1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985,86,87,88,93,94,95,97,98,1999,2000,01,02,2003
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "systty.h" /* For emacs_tty in termchar.h */
35 #include "termhooks.h"
36 /* cm.h must come after dispextern.h on Windows. */
37 #include "dispextern.h"
47 #include "intervals.h"
48 #include "blockinput.h"
51 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
52 include the following file. */
53 /* #include "systty.h" */
54 #include "syssignal.h"
58 #endif /* HAVE_X_WINDOWS */
62 #endif /* HAVE_NTGUI */
68 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
73 /* To get the prototype for `sleep'. */
79 /* Get number of chars of output now in the buffer of a stdio stream.
80 This ought to be built in in stdio, but it isn't. Some s- files
81 override this because their stdio internals differ. */
83 #ifdef __GNU_LIBRARY__
85 /* The s- file might have overridden the definition with one that
86 works for the system's C library. But we are using the GNU C
87 library, so this is the right definition for every system. */
89 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
90 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #undef PENDING_OUTPUT_COUNT
93 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
95 #else /* not __GNU_LIBRARY__ */
96 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
97 #include <stdio_ext.h>
98 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
100 #ifndef PENDING_OUTPUT_COUNT
101 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
103 #endif /* not __GNU_LIBRARY__ */
105 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
106 #include <term.h> /* for tgetent */
109 /* Structure to pass dimensions around. Used for character bounding
110 boxes, glyph matrix dimensions and alike. */
119 /* Function prototypes. */
121 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
122 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
123 static void fake_current_matrices
P_ ((Lisp_Object
));
124 static void redraw_overlapping_rows
P_ ((struct window
*, int));
125 static void redraw_overlapped_rows
P_ ((struct window
*, int));
126 static int count_blanks
P_ ((struct glyph
*, int));
127 static int count_match
P_ ((struct glyph
*, struct glyph
*,
128 struct glyph
*, struct glyph
*));
129 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
130 static void update_frame_line
P_ ((struct frame
*, int));
131 static struct dim allocate_matrices_for_frame_redisplay
132 P_ ((Lisp_Object
, int, int, int, int *));
133 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
134 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
135 static void adjust_frame_glyphs
P_ ((struct frame
*));
136 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
137 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
138 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
139 int, int, struct dim
));
140 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
141 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
143 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
146 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
148 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
150 static struct glyph_pool
*new_glyph_pool
P_ ((void));
151 static void free_glyph_pool
P_ ((struct glyph_pool
*));
152 static void adjust_frame_glyphs_initially
P_ ((void));
153 static void adjust_frame_message_buffer
P_ ((struct frame
*));
154 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
155 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
156 static void build_frame_matrix
P_ ((struct frame
*));
157 void clear_current_matrices
P_ ((struct frame
*));
158 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
160 static void clear_window_matrices
P_ ((struct window
*, int));
161 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
162 static int scrolling_window
P_ ((struct window
*, int));
163 static int update_window_line
P_ ((struct window
*, int, int *));
164 static void update_marginal_area
P_ ((struct window
*, int, int));
165 static int update_text_area
P_ ((struct window
*, int));
166 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
168 static void mirror_make_current
P_ ((struct window
*, int));
169 void check_window_matrix_pointers
P_ ((struct window
*));
171 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
172 struct glyph_matrix
*));
174 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
175 static int update_window_tree
P_ ((struct window
*, int));
176 static int update_window
P_ ((struct window
*, int));
177 static int update_frame_1
P_ ((struct frame
*, int, int));
178 static void set_window_cursor_after_update
P_ ((struct window
*));
179 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
180 struct glyph_row
*, int));
181 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
182 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
183 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
184 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
185 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
186 struct window
*frame_row_to_window
P_ ((struct window
*, int));
189 /* Non-zero means don't pause redisplay for pending input. (This is
190 for debugging and for a future implementation of EDT-like
193 int redisplay_dont_pause
;
195 /* Nonzero upon entry to redisplay means do not assume anything about
196 current contents of actual terminal frame; clear and redraw it. */
200 /* Nonzero means last display completed. Zero means it was preempted. */
202 int display_completed
;
204 /* Lisp variable visible-bell; enables use of screen-flash instead of
209 /* Invert the color of the whole frame, at a low level. */
213 /* Line speed of the terminal. */
217 /* Either nil or a symbol naming the window system under which Emacs
220 Lisp_Object Vwindow_system
;
222 /* Version number of X windows: 10, 11 or nil. */
224 Lisp_Object Vwindow_system_version
;
226 /* Vector of glyph definitions. Indexed by glyph number, the contents
227 are a string which is how to output the glyph.
229 If Vglyph_table is nil, a glyph is output by using its low 8 bits
232 This is an obsolete feature that is no longer used. The variable
233 is retained for compatibility. */
235 Lisp_Object Vglyph_table
;
237 /* Display table to use for vectors that don't specify their own. */
239 Lisp_Object Vstandard_display_table
;
241 /* Nonzero means reading single-character input with prompt so put
242 cursor on mini-buffer after the prompt. Positive means at end of
243 text in echo area; negative means at beginning of line. */
245 int cursor_in_echo_area
;
247 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
250 /* The currently selected frame. In a single-frame version, this
251 variable always equals the_only_frame. */
253 Lisp_Object selected_frame
;
255 /* A frame which is not just a mini-buffer, or 0 if there are no such
256 frames. This is usually the most recent such frame that was
257 selected. In a single-frame version, this variable always holds
258 the address of the_only_frame. */
260 struct frame
*last_nonminibuf_frame
;
262 /* 1 means SIGWINCH happened when not safe. */
264 int delayed_size_change
;
266 /* 1 means glyph initialization has been completed at startup. */
268 static int glyphs_initialized_initially_p
;
270 /* Updated window if != 0. Set by update_window. */
272 struct window
*updated_window
;
274 /* Glyph row updated in update_window_line, and area that is updated. */
276 struct glyph_row
*updated_row
;
279 /* A glyph for a space. */
281 struct glyph space_glyph
;
283 /* Non-zero means update has been performed directly, so that there's
284 no need for redisplay_internal to do much work. Set by
285 direct_output_for_insert. */
287 int redisplay_performed_directly_p
;
289 /* Counts of allocated structures. These counts serve to diagnose
290 memory leaks and double frees. */
292 int glyph_matrix_count
;
293 int glyph_pool_count
;
295 /* If non-null, the frame whose frame matrices are manipulated. If
296 null, window matrices are worked on. */
298 static struct frame
*frame_matrix_frame
;
300 /* Non-zero means that fonts have been loaded since the last glyph
301 matrix adjustments. Redisplay must stop, and glyph matrices must
302 be adjusted when this flag becomes non-zero during display. The
303 reason fonts can be loaded so late is that fonts of fontsets are
308 /* Convert vpos and hpos from frame to window and vice versa.
309 This may only be used for terminal frames. */
313 static int window_to_frame_vpos
P_ ((struct window
*, int));
314 static int window_to_frame_hpos
P_ ((struct window
*, int));
315 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
316 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
318 /* One element of the ring buffer containing redisplay history
321 struct redisplay_history
323 char trace
[512 + 100];
326 /* The size of the history buffer. */
328 #define REDISPLAY_HISTORY_SIZE 30
330 /* The redisplay history buffer. */
332 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
334 /* Next free entry in redisplay_history. */
336 static int history_idx
;
338 /* A tick that's incremented each time something is added to the
341 static unsigned history_tick
;
343 static void add_frame_display_history
P_ ((struct frame
*, int));
344 static void add_window_display_history
P_ ((struct window
*, char *, int));
347 /* Add to the redisplay history how window W has been displayed.
348 MSG is a trace containing the information how W's glyph matrix
349 has been constructed. PAUSED_P non-zero means that the update
350 has been interrupted for pending input. */
353 add_window_display_history (w
, msg
, paused_p
)
360 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
362 buf
= redisplay_history
[history_idx
].trace
;
365 sprintf (buf
, "%d: window %p (`%s')%s\n",
368 ((BUFFERP (w
->buffer
)
369 && STRINGP (XBUFFER (w
->buffer
)->name
))
370 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
372 paused_p
? " ***paused***" : "");
377 /* Add to the redisplay history that frame F has been displayed.
378 PAUSED_P non-zero means that the update has been interrupted for
382 add_frame_display_history (f
, paused_p
)
388 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
390 buf
= redisplay_history
[history_idx
].trace
;
393 sprintf (buf
, "%d: update frame %p%s",
395 f
, paused_p
? " ***paused***" : "");
399 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
400 Sdump_redisplay_history
, 0, 0, "",
401 doc
: /* Dump redisplay history to stderr. */)
406 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
409 i
= REDISPLAY_HISTORY_SIZE
- 1;
410 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
417 #else /* GLYPH_DEBUG == 0 */
419 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
420 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
422 #endif /* GLYPH_DEBUG == 0 */
425 /* Like bcopy except never gets confused by overlap. Let this be the
426 first function defined in this file, or change emacs.c where the
427 address of this function is used. */
430 safe_bcopy (from
, to
, size
)
435 if (size
<= 0 || from
== to
)
438 /* If the source and destination don't overlap, then bcopy can
439 handle it. If they do overlap, but the destination is lower in
440 memory than the source, we'll assume bcopy can handle that. */
441 if (to
< from
|| from
+ size
<= to
)
442 bcopy (from
, to
, size
);
444 /* Otherwise, we'll copy from the end. */
447 register const char *endf
= from
+ size
;
448 register char *endt
= to
+ size
;
450 /* If TO - FROM is large, then we should break the copy into
451 nonoverlapping chunks of TO - FROM bytes each. However, if
452 TO - FROM is small, then the bcopy function call overhead
453 makes this not worth it. The crossover point could be about
454 anywhere. Since I don't think the obvious copy loop is too
455 bad, I'm trying to err in its favor. */
460 while (endf
!= from
);
472 bcopy (endf
, endt
, to
- from
);
475 /* If SIZE wasn't a multiple of TO - FROM, there will be a
476 little left over. The amount left over is (endt + (to -
477 from)) - to, which is endt - from. */
478 bcopy (from
, to
, endt
- from
);
485 /***********************************************************************
487 ***********************************************************************/
489 /* Allocate and return a glyph_matrix structure. POOL is the glyph
490 pool from which memory for the matrix should be allocated, or null
491 for window-based redisplay where no glyph pools are used. The
492 member `pool' of the glyph matrix structure returned is set to
493 POOL, the structure is otherwise zeroed. */
495 struct glyph_matrix
*
496 new_glyph_matrix (pool
)
497 struct glyph_pool
*pool
;
499 struct glyph_matrix
*result
;
501 /* Allocate and clear. */
502 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
503 bzero (result
, sizeof *result
);
505 /* Increment number of allocated matrices. This count is used
506 to detect memory leaks. */
507 ++glyph_matrix_count
;
509 /* Set pool and return. */
515 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
517 The global counter glyph_matrix_count is decremented when a matrix
518 is freed. If the count gets negative, more structures were freed
519 than allocated, i.e. one matrix was freed more than once or a bogus
520 pointer was passed to this function.
522 If MATRIX->pool is null, this means that the matrix manages its own
523 glyph memory---this is done for matrices on X frames. Freeing the
524 matrix also frees the glyph memory in this case. */
527 free_glyph_matrix (matrix
)
528 struct glyph_matrix
*matrix
;
534 /* Detect the case that more matrices are freed than were
536 if (--glyph_matrix_count
< 0)
539 /* Free glyph memory if MATRIX owns it. */
540 if (matrix
->pool
== NULL
)
541 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
542 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
544 /* Free row structures and the matrix itself. */
545 xfree (matrix
->rows
);
551 /* Return the number of glyphs to reserve for a marginal area of
552 window W. TOTAL_GLYPHS is the number of glyphs in a complete
553 display line of window W. MARGIN gives the width of the marginal
554 area in canonical character units. MARGIN should be an integer
558 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
565 if (NUMBERP (margin
))
567 int width
= XFASTINT (w
->total_cols
);
568 double d
= max (0, XFLOATINT (margin
));
569 d
= min (width
/ 2 - 1, d
);
570 n
= (int) ((double) total_glyphs
/ width
* d
);
579 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
582 W is null if the function is called for a frame glyph matrix.
583 Otherwise it is the window MATRIX is a member of. X and Y are the
584 indices of the first column and row of MATRIX within the frame
585 matrix, if such a matrix exists. They are zero for purely
586 window-based redisplay. DIM is the needed size of the matrix.
588 In window-based redisplay, where no frame matrices exist, glyph
589 matrices manage their own glyph storage. Otherwise, they allocate
590 storage from a common frame glyph pool which can be found in
593 The reason for this memory management strategy is to avoid complete
594 frame redraws if possible. When we allocate from a common pool, a
595 change of the location or size of a sub-matrix within the pool
596 requires a complete redisplay of the frame because we cannot easily
597 make sure that the current matrices of all windows still agree with
598 what is displayed on the screen. While this is usually fast, it
599 leads to screen flickering. */
602 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
604 struct glyph_matrix
*matrix
;
610 int marginal_areas_changed_p
= 0;
611 int header_line_changed_p
= 0;
612 int header_line_p
= 0;
613 int left
= -1, right
= -1;
614 int window_width
= -1, window_height
;
616 /* See if W had a header line that has disappeared now, or vice versa.
620 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
622 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
623 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
625 matrix
->header_line_p
= header_line_p
;
627 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
628 Do nothing if MATRIX' size, position, vscroll, and marginal areas
629 haven't changed. This optimization is important because preserving
630 the matrix means preventing redisplay. */
631 if (matrix
->pool
== NULL
)
633 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
634 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
635 xassert (left
>= 0 && right
>= 0);
636 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
637 || right
!= matrix
->right_margin_glyphs
);
639 if (!marginal_areas_changed_p
641 && !header_line_changed_p
642 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
643 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
644 && matrix
->window_height
== window_height
645 && matrix
->window_vscroll
== w
->vscroll
646 && matrix
->window_width
== window_width
)
650 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
651 if (matrix
->rows_allocated
< dim
.height
)
653 int size
= dim
.height
* sizeof (struct glyph_row
);
654 new_rows
= dim
.height
- matrix
->rows_allocated
;
655 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
656 bzero (matrix
->rows
+ matrix
->rows_allocated
,
657 new_rows
* sizeof *matrix
->rows
);
658 matrix
->rows_allocated
= dim
.height
;
663 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
664 on a frame not using window-based redisplay. Set up pointers for
665 each row into the glyph pool. */
668 xassert (matrix
->pool
->glyphs
);
672 left
= margin_glyphs_to_reserve (w
, dim
.width
,
673 w
->left_margin_cols
);
674 right
= margin_glyphs_to_reserve (w
, dim
.width
,
675 w
->right_margin_cols
);
680 for (i
= 0; i
< dim
.height
; ++i
)
682 struct glyph_row
*row
= &matrix
->rows
[i
];
684 row
->glyphs
[LEFT_MARGIN_AREA
]
685 = (matrix
->pool
->glyphs
686 + (y
+ i
) * matrix
->pool
->ncolumns
690 || row
== matrix
->rows
+ dim
.height
- 1
691 || (row
== matrix
->rows
&& matrix
->header_line_p
))
693 row
->glyphs
[TEXT_AREA
]
694 = row
->glyphs
[LEFT_MARGIN_AREA
];
695 row
->glyphs
[RIGHT_MARGIN_AREA
]
696 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
697 row
->glyphs
[LAST_AREA
]
698 = row
->glyphs
[RIGHT_MARGIN_AREA
];
702 row
->glyphs
[TEXT_AREA
]
703 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
704 row
->glyphs
[RIGHT_MARGIN_AREA
]
705 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
706 row
->glyphs
[LAST_AREA
]
707 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
711 matrix
->left_margin_glyphs
= left
;
712 matrix
->right_margin_glyphs
= right
;
716 /* If MATRIX->pool is null, MATRIX is responsible for managing
717 its own memory. It is a window matrix for window-based redisplay.
718 Allocate glyph memory from the heap. */
719 if (dim
.width
> matrix
->matrix_w
721 || header_line_changed_p
722 || marginal_areas_changed_p
)
724 struct glyph_row
*row
= matrix
->rows
;
725 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
729 row
->glyphs
[LEFT_MARGIN_AREA
]
730 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
732 * sizeof (struct glyph
)));
734 /* The mode line never has marginal areas. */
735 if (row
== matrix
->rows
+ dim
.height
- 1
736 || (row
== matrix
->rows
&& matrix
->header_line_p
))
738 row
->glyphs
[TEXT_AREA
]
739 = row
->glyphs
[LEFT_MARGIN_AREA
];
740 row
->glyphs
[RIGHT_MARGIN_AREA
]
741 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
742 row
->glyphs
[LAST_AREA
]
743 = row
->glyphs
[RIGHT_MARGIN_AREA
];
747 row
->glyphs
[TEXT_AREA
]
748 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
749 row
->glyphs
[RIGHT_MARGIN_AREA
]
750 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
751 row
->glyphs
[LAST_AREA
]
752 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
758 xassert (left
>= 0 && right
>= 0);
759 matrix
->left_margin_glyphs
= left
;
760 matrix
->right_margin_glyphs
= right
;
763 /* Number of rows to be used by MATRIX. */
764 matrix
->nrows
= dim
.height
;
765 xassert (matrix
->nrows
>= 0);
769 if (matrix
== w
->current_matrix
)
771 /* Mark rows in a current matrix of a window as not having
772 valid contents. It's important to not do this for
773 desired matrices. When Emacs starts, it may already be
774 building desired matrices when this function runs. */
775 if (window_width
< 0)
776 window_width
= window_box_width (w
, -1);
778 /* Optimize the case that only the height has changed (C-x 2,
779 upper window). Invalidate all rows that are no longer part
781 if (!marginal_areas_changed_p
782 && !header_line_changed_p
784 && dim
.width
== matrix
->matrix_w
785 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
786 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
787 && matrix
->window_width
== window_width
)
789 /* Find the last row in the window. */
790 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
791 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
797 /* Window end is invalid, if inside of the rows that
798 are invalidated below. */
799 if (INTEGERP (w
->window_end_vpos
)
800 && XFASTINT (w
->window_end_vpos
) >= i
)
801 w
->window_end_valid
= Qnil
;
803 while (i
< matrix
->nrows
)
804 matrix
->rows
[i
++].enabled_p
= 0;
808 for (i
= 0; i
< matrix
->nrows
; ++i
)
809 matrix
->rows
[i
].enabled_p
= 0;
812 else if (matrix
== w
->desired_matrix
)
814 /* Rows in desired matrices always have to be cleared;
815 redisplay expects this is the case when it runs, so it
816 had better be the case when we adjust matrices between
818 for (i
= 0; i
< matrix
->nrows
; ++i
)
819 matrix
->rows
[i
].enabled_p
= 0;
824 /* Remember last values to be able to optimize frame redraws. */
825 matrix
->matrix_x
= x
;
826 matrix
->matrix_y
= y
;
827 matrix
->matrix_w
= dim
.width
;
828 matrix
->matrix_h
= dim
.height
;
830 /* Record the top y location and height of W at the time the matrix
831 was last adjusted. This is used to optimize redisplay above. */
834 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
835 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
836 matrix
->window_height
= window_height
;
837 matrix
->window_width
= window_width
;
838 matrix
->window_vscroll
= w
->vscroll
;
843 /* Reverse the contents of rows in MATRIX between START and END. The
844 contents of the row at END - 1 end up at START, END - 2 at START +
845 1 etc. This is part of the implementation of rotate_matrix (see
849 reverse_rows (matrix
, start
, end
)
850 struct glyph_matrix
*matrix
;
855 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
857 /* Non-ISO HP/UX compiler doesn't like auto struct
859 struct glyph_row temp
;
860 temp
= matrix
->rows
[i
];
861 matrix
->rows
[i
] = matrix
->rows
[j
];
862 matrix
->rows
[j
] = temp
;
867 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
868 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
869 indices. (Note: this does not copy glyphs, only glyph pointers in
870 row structures are moved around).
872 The algorithm used for rotating the vector was, I believe, first
873 described by Kernighan. See the vector R as consisting of two
874 sub-vectors AB, where A has length BY for BY >= 0. The result
875 after rotating is then BA. Reverse both sub-vectors to get ArBr
876 and reverse the result to get (ArBr)r which is BA. Similar for
880 rotate_matrix (matrix
, first
, last
, by
)
881 struct glyph_matrix
*matrix
;
886 /* Up (rotate left, i.e. towards lower indices). */
888 reverse_rows (matrix
, first
, first
+ by
);
889 reverse_rows (matrix
, first
+ by
, last
);
890 reverse_rows (matrix
, first
, last
);
894 /* Down (rotate right, i.e. towards higher indices). */
895 reverse_rows (matrix
, last
- by
, last
);
896 reverse_rows (matrix
, first
, last
- by
);
897 reverse_rows (matrix
, first
, last
);
902 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
903 with indices START <= index < END. Increment positions by DELTA/
907 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
908 struct glyph_matrix
*matrix
;
909 int start
, end
, delta
, delta_bytes
;
911 /* Check that START and END are reasonable values. */
912 xassert (start
>= 0 && start
<= matrix
->nrows
);
913 xassert (end
>= 0 && end
<= matrix
->nrows
);
914 xassert (start
<= end
);
916 for (; start
< end
; ++start
)
917 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
921 /* Enable a range of rows in glyph matrix MATRIX. START and END are
922 the row indices of the first and last + 1 row to enable. If
923 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
926 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
927 struct glyph_matrix
*matrix
;
931 xassert (start
<= end
);
932 xassert (start
>= 0 && start
< matrix
->nrows
);
933 xassert (end
>= 0 && end
<= matrix
->nrows
);
935 for (; start
< end
; ++start
)
936 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
942 This empties all rows in MATRIX by setting the enabled_p flag for
943 all rows of the matrix to zero. The function prepare_desired_row
944 will eventually really clear a row when it sees one with a zero
947 Resets update hints to defaults value. The only update hint
948 currently present is the flag MATRIX->no_scrolling_p. */
951 clear_glyph_matrix (matrix
)
952 struct glyph_matrix
*matrix
;
956 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
957 matrix
->no_scrolling_p
= 0;
962 /* Shift part of the glyph matrix MATRIX of window W up or down.
963 Increment y-positions in glyph rows between START and END by DY,
964 and recompute their visible height. */
967 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
969 struct glyph_matrix
*matrix
;
974 xassert (start
<= end
);
975 xassert (start
>= 0 && start
< matrix
->nrows
);
976 xassert (end
>= 0 && end
<= matrix
->nrows
);
978 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
979 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
981 for (; start
< end
; ++start
)
983 struct glyph_row
*row
= &matrix
->rows
[start
];
986 row
->visible_height
= row
->height
;
989 row
->visible_height
-= min_y
- row
->y
;
990 if (row
->y
+ row
->height
> max_y
)
991 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
996 /* Mark all rows in current matrices of frame F as invalid. Marking
997 invalid is done by setting enabled_p to zero for all rows in a
1001 clear_current_matrices (f
)
1002 register struct frame
*f
;
1004 /* Clear frame current matrix, if we have one. */
1005 if (f
->current_matrix
)
1006 clear_glyph_matrix (f
->current_matrix
);
1008 /* Clear the matrix of the menu bar window, if such a window exists.
1009 The menu bar window is currently used to display menus on X when
1010 no toolkit support is compiled in. */
1011 if (WINDOWP (f
->menu_bar_window
))
1012 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1014 /* Clear the matrix of the tool-bar window, if any. */
1015 if (WINDOWP (f
->tool_bar_window
))
1016 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1018 /* Clear current window matrices. */
1019 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1020 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1024 /* Clear out all display lines of F for a coming redisplay. */
1027 clear_desired_matrices (f
)
1028 register struct frame
*f
;
1030 if (f
->desired_matrix
)
1031 clear_glyph_matrix (f
->desired_matrix
);
1033 if (WINDOWP (f
->menu_bar_window
))
1034 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1036 if (WINDOWP (f
->tool_bar_window
))
1037 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1039 /* Do it for window matrices. */
1040 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1041 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1045 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1046 non-zero clear desired matrices, otherwise clear current matrices. */
1049 clear_window_matrices (w
, desired_p
)
1055 if (!NILP (w
->hchild
))
1057 xassert (WINDOWP (w
->hchild
));
1058 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1060 else if (!NILP (w
->vchild
))
1062 xassert (WINDOWP (w
->vchild
));
1063 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1068 clear_glyph_matrix (w
->desired_matrix
);
1071 clear_glyph_matrix (w
->current_matrix
);
1072 w
->window_end_valid
= Qnil
;
1076 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1082 /***********************************************************************
1085 See dispextern.h for an overall explanation of glyph rows.
1086 ***********************************************************************/
1088 /* Clear glyph row ROW. Do it in a way that makes it robust against
1089 changes in the glyph_row structure, i.e. addition or removal of
1090 structure members. */
1092 static struct glyph_row null_row
;
1095 clear_glyph_row (row
)
1096 struct glyph_row
*row
;
1098 struct glyph
*p
[1 + LAST_AREA
];
1100 /* Save pointers. */
1101 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1102 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1103 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1104 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1109 /* Restore pointers. */
1110 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1111 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1112 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1113 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1115 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1116 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1117 Redisplay outputs such glyphs, and flickering effects were
1118 the result. This also depended on the contents of memory
1119 returned by xmalloc. If flickering happens again, activate
1120 the code below. If the flickering is gone with that, chances
1121 are that the flickering has the same reason as here. */
1122 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1127 /* Make ROW an empty, enabled row of canonical character height,
1128 in window W starting at y-position Y. */
1131 blank_row (w
, row
, y
)
1133 struct glyph_row
*row
;
1138 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1139 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1141 clear_glyph_row (row
);
1143 row
->ascent
= row
->phys_ascent
= 0;
1144 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1145 row
->visible_height
= row
->height
;
1148 row
->visible_height
-= min_y
- row
->y
;
1149 if (row
->y
+ row
->height
> max_y
)
1150 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1156 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1157 are the amounts by which to change positions. Note that the first
1158 glyph of the text area of a row can have a buffer position even if
1159 the used count of the text area is zero. Such rows display line
1163 increment_row_positions (row
, delta
, delta_bytes
)
1164 struct glyph_row
*row
;
1165 int delta
, delta_bytes
;
1169 /* Increment start and end positions. */
1170 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1171 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1172 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1173 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1175 /* Increment positions in glyphs. */
1176 for (area
= 0; area
< LAST_AREA
; ++area
)
1177 for (i
= 0; i
< row
->used
[area
]; ++i
)
1178 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1179 && row
->glyphs
[area
][i
].charpos
> 0)
1180 row
->glyphs
[area
][i
].charpos
+= delta
;
1182 /* Capture the case of rows displaying a line end. */
1183 if (row
->used
[TEXT_AREA
] == 0
1184 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1185 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1190 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1191 contents, i.e. glyph structure contents are exchanged between A and
1192 B without changing glyph pointers in A and B. */
1195 swap_glyphs_in_rows (a
, b
)
1196 struct glyph_row
*a
, *b
;
1200 for (area
= 0; area
< LAST_AREA
; ++area
)
1202 /* Number of glyphs to swap. */
1203 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1205 /* Start of glyphs in area of row A. */
1206 struct glyph
*glyph_a
= a
->glyphs
[area
];
1208 /* End + 1 of glyphs in area of row A. */
1209 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1211 /* Start of glyphs in area of row B. */
1212 struct glyph
*glyph_b
= b
->glyphs
[area
];
1214 while (glyph_a
< glyph_a_end
)
1216 /* Non-ISO HP/UX compiler doesn't like auto struct
1220 *glyph_a
= *glyph_b
;
1230 /* Exchange pointers to glyph memory between glyph rows A and B. */
1233 swap_glyph_pointers (a
, b
)
1234 struct glyph_row
*a
, *b
;
1237 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1239 struct glyph
*temp
= a
->glyphs
[i
];
1240 a
->glyphs
[i
] = b
->glyphs
[i
];
1241 b
->glyphs
[i
] = temp
;
1246 /* Copy glyph row structure FROM to glyph row structure TO, except
1247 that glyph pointers in the structures are left unchanged. */
1250 copy_row_except_pointers (to
, from
)
1251 struct glyph_row
*to
, *from
;
1253 struct glyph
*pointers
[1 + LAST_AREA
];
1255 /* Save glyph pointers of TO. */
1256 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1258 /* Do a structure assignment. */
1261 /* Restore original pointers of TO. */
1262 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1266 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1267 TO and FROM are left unchanged. Glyph contents are copied from the
1268 glyph memory of FROM to the glyph memory of TO. Increment buffer
1269 positions in row TO by DELTA/ DELTA_BYTES. */
1272 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1273 struct glyph_row
*to
, *from
;
1274 int delta
, delta_bytes
;
1278 /* This is like a structure assignment TO = FROM, except that
1279 glyph pointers in the rows are left unchanged. */
1280 copy_row_except_pointers (to
, from
);
1282 /* Copy glyphs from FROM to TO. */
1283 for (area
= 0; area
< LAST_AREA
; ++area
)
1284 if (from
->used
[area
])
1285 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1286 from
->used
[area
] * sizeof (struct glyph
));
1288 /* Increment buffer positions in TO by DELTA. */
1289 increment_row_positions (to
, delta
, delta_bytes
);
1293 /* Assign glyph row FROM to glyph row TO. This works like a structure
1294 assignment TO = FROM, except that glyph pointers are not copied but
1295 exchanged between TO and FROM. Pointers must be exchanged to avoid
1299 assign_row (to
, from
)
1300 struct glyph_row
*to
, *from
;
1302 swap_glyph_pointers (to
, from
);
1303 copy_row_except_pointers (to
, from
);
1307 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1308 a row in a window matrix, is a slice of the glyph memory of the
1309 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1310 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1311 memory of FRAME_ROW. */
1316 glyph_row_slice_p (window_row
, frame_row
)
1317 struct glyph_row
*window_row
, *frame_row
;
1319 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1320 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1321 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1323 return (frame_glyph_start
<= window_glyph_start
1324 && window_glyph_start
< frame_glyph_end
);
1327 #endif /* GLYPH_DEBUG */
1331 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1332 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1333 in WINDOW_MATRIX is found satisfying the condition. */
1335 static struct glyph_row
*
1336 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1337 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1342 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1344 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1345 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1346 frame_matrix
->rows
+ row
))
1349 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1354 /* Prepare ROW for display. Desired rows are cleared lazily,
1355 i.e. they are only marked as to be cleared by setting their
1356 enabled_p flag to zero. When a row is to be displayed, a prior
1357 call to this function really clears it. */
1360 prepare_desired_row (row
)
1361 struct glyph_row
*row
;
1363 if (!row
->enabled_p
)
1365 clear_glyph_row (row
);
1371 /* Return a hash code for glyph row ROW. */
1374 line_hash_code (row
)
1375 struct glyph_row
*row
;
1381 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1382 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1386 int c
= glyph
->u
.ch
;
1387 int face_id
= glyph
->face_id
;
1388 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1390 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1391 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1403 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1404 the number of characters in the line. If must_write_spaces is
1405 zero, leading and trailing spaces are ignored. */
1408 line_draw_cost (matrix
, vpos
)
1409 struct glyph_matrix
*matrix
;
1412 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1413 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1414 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1416 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1417 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1419 /* Ignore trailing and leading spaces if we can. */
1420 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1422 /* Skip from the end over trailing spaces. */
1423 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1426 /* All blank line. */
1430 /* Skip over leading spaces. */
1431 while (CHAR_GLYPH_SPACE_P (*beg
))
1435 /* If we don't have a glyph-table, each glyph is one character,
1436 so return the number of glyphs. */
1437 if (glyph_table_base
== 0)
1441 /* Otherwise, scan the glyphs and accumulate their total length
1446 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1449 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1452 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1462 /* Test two glyph rows A and B for equality. Value is non-zero if A
1463 and B have equal contents. W is the window to which the glyphs
1464 rows A and B belong. It is needed here to test for partial row
1465 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1466 flags of A and B, too. */
1469 row_equal_p (w
, a
, b
, mouse_face_p
)
1471 struct glyph_row
*a
, *b
;
1476 else if (a
->hash
!= b
->hash
)
1480 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1483 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1486 /* Compare glyphs. */
1487 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1489 if (a
->used
[area
] != b
->used
[area
])
1492 a_glyph
= a
->glyphs
[area
];
1493 a_end
= a_glyph
+ a
->used
[area
];
1494 b_glyph
= b
->glyphs
[area
];
1496 while (a_glyph
< a_end
1497 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1498 ++a_glyph
, ++b_glyph
;
1500 if (a_glyph
!= a_end
)
1504 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1505 || a
->fill_line_p
!= b
->fill_line_p
1506 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1507 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1508 || a
->continued_p
!= b
->continued_p
1509 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1510 || a
->overlapped_p
!= b
->overlapped_p
1511 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1512 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1513 /* Different partially visible characters on left margin. */
1515 /* Different height. */
1516 || a
->ascent
!= b
->ascent
1517 || a
->phys_ascent
!= b
->phys_ascent
1518 || a
->phys_height
!= b
->phys_height
1519 || a
->visible_height
!= b
->visible_height
)
1528 /***********************************************************************
1531 See dispextern.h for an overall explanation of glyph pools.
1532 ***********************************************************************/
1534 /* Allocate a glyph_pool structure. The structure returned is
1535 initialized with zeros. The global variable glyph_pool_count is
1536 incremented for each pool allocated. */
1538 static struct glyph_pool
*
1541 struct glyph_pool
*result
;
1543 /* Allocate a new glyph_pool and clear it. */
1544 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1545 bzero (result
, sizeof *result
);
1547 /* For memory leak and double deletion checking. */
1554 /* Free a glyph_pool structure POOL. The function may be called with
1555 a null POOL pointer. The global variable glyph_pool_count is
1556 decremented with every pool structure freed. If this count gets
1557 negative, more structures were freed than allocated, i.e. one
1558 structure must have been freed more than once or a bogus pointer
1559 was passed to free_glyph_pool. */
1562 free_glyph_pool (pool
)
1563 struct glyph_pool
*pool
;
1567 /* More freed than allocated? */
1569 xassert (glyph_pool_count
>= 0);
1571 xfree (pool
->glyphs
);
1577 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1578 columns we need. This function never shrinks a pool. The only
1579 case in which this would make sense, would be when a frame's size
1580 is changed from a large value to a smaller one. But, if someone
1581 does it once, we can expect that he will do it again.
1583 Value is non-zero if the pool changed in a way which makes
1584 re-adjusting window glyph matrices necessary. */
1587 realloc_glyph_pool (pool
, matrix_dim
)
1588 struct glyph_pool
*pool
;
1589 struct dim matrix_dim
;
1594 changed_p
= (pool
->glyphs
== 0
1595 || matrix_dim
.height
!= pool
->nrows
1596 || matrix_dim
.width
!= pool
->ncolumns
);
1598 /* Enlarge the glyph pool. */
1599 needed
= matrix_dim
.width
* matrix_dim
.height
;
1600 if (needed
> pool
->nglyphs
)
1602 int size
= needed
* sizeof (struct glyph
);
1605 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1608 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1609 bzero (pool
->glyphs
, size
);
1612 pool
->nglyphs
= needed
;
1615 /* Remember the number of rows and columns because (a) we use them
1616 to do sanity checks, and (b) the number of columns determines
1617 where rows in the frame matrix start---this must be available to
1618 determine pointers to rows of window sub-matrices. */
1619 pool
->nrows
= matrix_dim
.height
;
1620 pool
->ncolumns
= matrix_dim
.width
;
1627 /***********************************************************************
1629 ***********************************************************************/
1634 /* Flush standard output. This is sometimes useful to call from the debugger.
1635 XXX Maybe this should be changed to flush the current terminal instead of
1646 /* Check that no glyph pointers have been lost in MATRIX. If a
1647 pointer has been lost, e.g. by using a structure assignment between
1648 rows, at least one pointer must occur more than once in the rows of
1652 check_matrix_pointer_lossage (matrix
)
1653 struct glyph_matrix
*matrix
;
1657 for (i
= 0; i
< matrix
->nrows
; ++i
)
1658 for (j
= 0; j
< matrix
->nrows
; ++j
)
1660 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1661 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1665 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1668 matrix_row (matrix
, row
)
1669 struct glyph_matrix
*matrix
;
1672 xassert (matrix
&& matrix
->rows
);
1673 xassert (row
>= 0 && row
< matrix
->nrows
);
1675 /* That's really too slow for normal testing because this function
1676 is called almost everywhere. Although---it's still astonishingly
1677 fast, so it is valuable to have for debugging purposes. */
1679 check_matrix_pointer_lossage (matrix
);
1682 return matrix
->rows
+ row
;
1686 #if 0 /* This function makes invalid assumptions when text is
1687 partially invisible. But it might come handy for debugging
1690 /* Check invariants that must hold for an up to date current matrix of
1694 check_matrix_invariants (w
)
1697 struct glyph_matrix
*matrix
= w
->current_matrix
;
1698 int yb
= window_text_bottom_y (w
);
1699 struct glyph_row
*row
= matrix
->rows
;
1700 struct glyph_row
*last_text_row
= NULL
;
1701 struct buffer
*saved
= current_buffer
;
1702 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1705 /* This can sometimes happen for a fresh window. */
1706 if (matrix
->nrows
< 2)
1709 set_buffer_temp (buffer
);
1711 /* Note: last row is always reserved for the mode line. */
1712 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1713 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1715 struct glyph_row
*next
= row
+ 1;
1717 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1718 last_text_row
= row
;
1720 /* Check that character and byte positions are in sync. */
1721 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1722 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1724 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1725 have such a position temporarily in case of a minibuffer
1726 displaying something like `[Sole completion]' at its end. */
1727 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1728 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1729 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1731 /* Check that end position of `row' is equal to start position
1733 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1735 xassert (MATRIX_ROW_END_CHARPOS (row
)
1736 == MATRIX_ROW_START_CHARPOS (next
));
1737 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1738 == MATRIX_ROW_START_BYTEPOS (next
));
1743 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1744 xassert (w
->desired_matrix
->rows
!= NULL
);
1745 set_buffer_temp (saved
);
1750 #endif /* GLYPH_DEBUG != 0 */
1754 /**********************************************************************
1755 Allocating/ Adjusting Glyph Matrices
1756 **********************************************************************/
1758 /* Allocate glyph matrices over a window tree for a frame-based
1761 X and Y are column/row within the frame glyph matrix where
1762 sub-matrices for the window tree rooted at WINDOW must be
1763 allocated. CH_DIM contains the dimensions of the smallest
1764 character that could be used during display. DIM_ONLY_P non-zero
1765 means that the caller of this function is only interested in the
1766 result matrix dimension, and matrix adjustments should not be
1769 The function returns the total width/height of the sub-matrices of
1770 the window tree. If called on a frame root window, the computation
1771 will take the mini-buffer window into account.
1773 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1775 NEW_LEAF_MATRIX set if any window in the tree did not have a
1776 glyph matrices yet, and
1778 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1779 any window in the tree will be changed or have been changed (see
1782 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1785 Windows are arranged into chains of windows on the same level
1786 through the next fields of window structures. Such a level can be
1787 either a sequence of horizontally adjacent windows from left to
1788 right, or a sequence of vertically adjacent windows from top to
1789 bottom. Each window in a horizontal sequence can be either a leaf
1790 window or a vertical sequence; a window in a vertical sequence can
1791 be either a leaf or a horizontal sequence. All windows in a
1792 horizontal sequence have the same height, and all windows in a
1793 vertical sequence have the same width.
1795 This function uses, for historical reasons, a more general
1796 algorithm to determine glyph matrix dimensions that would be
1799 The matrix height of a horizontal sequence is determined by the
1800 maximum height of any matrix in the sequence. The matrix width of
1801 a horizontal sequence is computed by adding up matrix widths of
1802 windows in the sequence.
1804 |<------- result width ------->|
1805 +---------+----------+---------+ ---
1808 +---------+ | | result height
1813 The matrix width of a vertical sequence is the maximum matrix width
1814 of any window in the sequence. Its height is computed by adding up
1815 matrix heights of windows in the sequence.
1817 |<---- result width -->|
1825 +------------+---------+ |
1828 +------------+---------+ --- */
1830 /* Bit indicating that a new matrix will be allocated or has been
1833 #define NEW_LEAF_MATRIX (1 << 0)
1835 /* Bit indicating that a matrix will or has changed its location or
1838 #define CHANGED_LEAF_MATRIX (1 << 1)
1841 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1842 window_change_flags
)
1846 int *window_change_flags
;
1848 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1850 int wmax
= 0, hmax
= 0;
1854 int in_horz_combination_p
;
1856 /* What combination is WINDOW part of? Compute this once since the
1857 result is the same for all windows in the `next' chain. The
1858 special case of a root window (parent equal to nil) is treated
1859 like a vertical combination because a root window's `next'
1860 points to the mini-buffer window, if any, which is arranged
1861 vertically below other windows. */
1862 in_horz_combination_p
1863 = (!NILP (XWINDOW (window
)->parent
)
1864 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1866 /* For WINDOW and all windows on the same level. */
1869 w
= XWINDOW (window
);
1871 /* Get the dimension of the window sub-matrix for W, depending
1872 on whether this is a combination or a leaf window. */
1873 if (!NILP (w
->hchild
))
1874 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1876 window_change_flags
);
1877 else if (!NILP (w
->vchild
))
1878 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1880 window_change_flags
);
1883 /* If not already done, allocate sub-matrix structures. */
1884 if (w
->desired_matrix
== NULL
)
1886 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1887 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1888 *window_change_flags
|= NEW_LEAF_MATRIX
;
1891 /* Width and height MUST be chosen so that there are no
1892 holes in the frame matrix. */
1893 dim
.width
= required_matrix_width (w
);
1894 dim
.height
= required_matrix_height (w
);
1896 /* Will matrix be re-allocated? */
1897 if (x
!= w
->desired_matrix
->matrix_x
1898 || y
!= w
->desired_matrix
->matrix_y
1899 || dim
.width
!= w
->desired_matrix
->matrix_w
1900 || dim
.height
!= w
->desired_matrix
->matrix_h
1901 || (margin_glyphs_to_reserve (w
, dim
.width
,
1902 w
->right_margin_cols
)
1903 != w
->desired_matrix
->left_margin_glyphs
)
1904 || (margin_glyphs_to_reserve (w
, dim
.width
,
1905 w
->left_margin_cols
)
1906 != w
->desired_matrix
->right_margin_glyphs
))
1907 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1909 /* Actually change matrices, if allowed. Do not consider
1910 CHANGED_LEAF_MATRIX computed above here because the pool
1911 may have been changed which we don't now here. We trust
1912 that we only will be called with DIM_ONLY_P != 0 when
1916 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1917 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1921 /* If we are part of a horizontal combination, advance x for
1922 windows to the right of W; otherwise advance y for windows
1924 if (in_horz_combination_p
)
1929 /* Remember maximum glyph matrix dimensions. */
1930 wmax
= max (wmax
, dim
.width
);
1931 hmax
= max (hmax
, dim
.height
);
1933 /* Next window on same level. */
1936 while (!NILP (window
));
1938 /* Set `total' to the total glyph matrix dimension of this window
1939 level. In a vertical combination, the width is the width of the
1940 widest window; the height is the y we finally reached, corrected
1941 by the y we started with. In a horizontal combination, the total
1942 height is the height of the tallest window, and the width is the
1943 x we finally reached, corrected by the x we started with. */
1944 if (in_horz_combination_p
)
1946 total
.width
= x
- x0
;
1947 total
.height
= hmax
;
1952 total
.height
= y
- y0
;
1959 /* Return the required height of glyph matrices for window W. */
1962 required_matrix_height (w
)
1965 #ifdef HAVE_WINDOW_SYSTEM
1966 struct frame
*f
= XFRAME (w
->frame
);
1968 if (FRAME_WINDOW_P (f
))
1970 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1971 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1972 return (((window_pixel_height
+ ch_height
- 1)
1974 /* One partially visible line at the top and
1975 bottom of the window. */
1977 /* 2 for header and mode line. */
1980 #endif /* HAVE_WINDOW_SYSTEM */
1982 return WINDOW_TOTAL_LINES (w
);
1986 /* Return the required width of glyph matrices for window W. */
1989 required_matrix_width (w
)
1992 #ifdef HAVE_WINDOW_SYSTEM
1993 struct frame
*f
= XFRAME (w
->frame
);
1994 if (FRAME_WINDOW_P (f
))
1996 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
1997 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
1999 /* Compute number of glyphs needed in a glyph row. */
2000 return (((window_pixel_width
+ ch_width
- 1)
2002 /* 2 partially visible columns in the text area. */
2004 /* One partially visible column at the right
2005 edge of each marginal area. */
2008 #endif /* HAVE_WINDOW_SYSTEM */
2010 return XINT (w
->total_cols
);
2014 /* Allocate window matrices for window-based redisplay. W is the
2015 window whose matrices must be allocated/reallocated. CH_DIM is the
2016 size of the smallest character that could potentially be used on W. */
2019 allocate_matrices_for_window_redisplay (w
)
2024 if (!NILP (w
->vchild
))
2025 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2026 else if (!NILP (w
->hchild
))
2027 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2030 /* W is a leaf window. */
2033 /* If matrices are not yet allocated, allocate them now. */
2034 if (w
->desired_matrix
== NULL
)
2036 w
->desired_matrix
= new_glyph_matrix (NULL
);
2037 w
->current_matrix
= new_glyph_matrix (NULL
);
2040 dim
.width
= required_matrix_width (w
);
2041 dim
.height
= required_matrix_height (w
);
2042 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2043 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2046 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2051 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2052 do it for all frames; otherwise do it just for the given frame.
2053 This function must be called when a new frame is created, its size
2054 changes, or its window configuration changes. */
2060 /* Block input so that expose events and other events that access
2061 glyph matrices are not processed while we are changing them. */
2065 adjust_frame_glyphs (f
);
2068 Lisp_Object tail
, lisp_frame
;
2070 FOR_EACH_FRAME (tail
, lisp_frame
)
2071 adjust_frame_glyphs (XFRAME (lisp_frame
));
2078 /* Adjust frame glyphs when Emacs is initialized.
2080 To be called from init_display.
2082 We need a glyph matrix because redraw will happen soon.
2083 Unfortunately, window sizes on selected_frame are not yet set to
2084 meaningful values. I believe we can assume that there are only two
2085 windows on the frame---the mini-buffer and the root window. Frame
2086 height and width seem to be correct so far. So, set the sizes of
2087 windows to estimated values. */
2090 adjust_frame_glyphs_initially ()
2092 struct frame
*sf
= SELECTED_FRAME ();
2093 struct window
*root
= XWINDOW (sf
->root_window
);
2094 struct window
*mini
= XWINDOW (root
->next
);
2095 int frame_lines
= FRAME_LINES (sf
);
2096 int frame_cols
= FRAME_COLS (sf
);
2097 int top_margin
= FRAME_TOP_MARGIN (sf
);
2099 /* Do it for the root window. */
2100 XSETFASTINT (root
->top_line
, top_margin
);
2101 XSETFASTINT (root
->total_cols
, frame_cols
);
2102 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2104 /* Do it for the mini-buffer window. */
2105 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2106 XSETFASTINT (mini
->total_cols
, frame_cols
);
2107 set_window_height (root
->next
, 1, 0);
2109 adjust_frame_glyphs (sf
);
2110 glyphs_initialized_initially_p
= 1;
2114 /* Allocate/reallocate glyph matrices of a single frame F. */
2117 adjust_frame_glyphs (f
)
2120 if (FRAME_WINDOW_P (f
))
2121 adjust_frame_glyphs_for_window_redisplay (f
);
2123 adjust_frame_glyphs_for_frame_redisplay (f
);
2125 /* Don't forget the message buffer and the buffer for
2126 decode_mode_spec. */
2127 adjust_frame_message_buffer (f
);
2128 adjust_decode_mode_spec_buffer (f
);
2130 f
->glyphs_initialized_p
= 1;
2134 /* In the window tree with root W, build current matrices of leaf
2135 windows from the frame's current matrix. */
2138 fake_current_matrices (window
)
2143 for (; !NILP (window
); window
= w
->next
)
2145 w
= XWINDOW (window
);
2147 if (!NILP (w
->hchild
))
2148 fake_current_matrices (w
->hchild
);
2149 else if (!NILP (w
->vchild
))
2150 fake_current_matrices (w
->vchild
);
2154 struct frame
*f
= XFRAME (w
->frame
);
2155 struct glyph_matrix
*m
= w
->current_matrix
;
2156 struct glyph_matrix
*fm
= f
->current_matrix
;
2158 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2159 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2161 for (i
= 0; i
< m
->matrix_h
; ++i
)
2163 struct glyph_row
*r
= m
->rows
+ i
;
2164 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2166 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2167 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2169 r
->enabled_p
= fr
->enabled_p
;
2172 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2173 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2174 r
->used
[TEXT_AREA
] = (m
->matrix_w
2175 - r
->used
[LEFT_MARGIN_AREA
]
2176 - r
->used
[RIGHT_MARGIN_AREA
]);
2185 /* Save away the contents of frame F's current frame matrix. Value is
2186 a glyph matrix holding the contents of F's current frame matrix. */
2188 static struct glyph_matrix
*
2189 save_current_matrix (f
)
2193 struct glyph_matrix
*saved
;
2195 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2196 bzero (saved
, sizeof *saved
);
2197 saved
->nrows
= f
->current_matrix
->nrows
;
2198 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2199 * sizeof *saved
->rows
);
2200 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2202 for (i
= 0; i
< saved
->nrows
; ++i
)
2204 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2205 struct glyph_row
*to
= saved
->rows
+ i
;
2206 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2207 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2208 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2209 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2216 /* Restore the contents of frame F's current frame matrix from SAVED,
2217 and free memory associated with SAVED. */
2220 restore_current_matrix (f
, saved
)
2222 struct glyph_matrix
*saved
;
2226 for (i
= 0; i
< saved
->nrows
; ++i
)
2228 struct glyph_row
*from
= saved
->rows
+ i
;
2229 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2230 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2231 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2232 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2233 xfree (from
->glyphs
[TEXT_AREA
]);
2236 xfree (saved
->rows
);
2242 /* Allocate/reallocate glyph matrices of a single frame F for
2243 frame-based redisplay. */
2246 adjust_frame_glyphs_for_frame_redisplay (f
)
2250 struct dim matrix_dim
;
2252 int window_change_flags
;
2255 if (!FRAME_LIVE_P (f
))
2258 /* Determine the smallest character in any font for F. On
2259 console windows, all characters have dimension (1, 1). */
2260 ch_dim
.width
= ch_dim
.height
= 1;
2262 top_window_y
= FRAME_TOP_MARGIN (f
);
2264 /* Allocate glyph pool structures if not already done. */
2265 if (f
->desired_pool
== NULL
)
2267 f
->desired_pool
= new_glyph_pool ();
2268 f
->current_pool
= new_glyph_pool ();
2271 /* Allocate frames matrix structures if needed. */
2272 if (f
->desired_matrix
== NULL
)
2274 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2275 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2278 /* Compute window glyph matrices. (This takes the mini-buffer
2279 window into account). The result is the size of the frame glyph
2280 matrix needed. The variable window_change_flags is set to a bit
2281 mask indicating whether new matrices will be allocated or
2282 existing matrices change their size or location within the frame
2284 window_change_flags
= 0;
2286 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2289 &window_change_flags
);
2291 /* Add in menu bar lines, if any. */
2292 matrix_dim
.height
+= top_window_y
;
2294 /* Enlarge pools as necessary. */
2295 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2296 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2298 /* Set up glyph pointers within window matrices. Do this only if
2299 absolutely necessary since it requires a frame redraw. */
2300 if (pool_changed_p
|| window_change_flags
)
2302 /* Do it for window matrices. */
2303 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2305 &window_change_flags
);
2307 /* Size of frame matrices must equal size of frame. Note
2308 that we are called for X frames with window widths NOT equal
2309 to the frame width (from CHANGE_FRAME_SIZE_1). */
2310 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2311 && matrix_dim
.height
== FRAME_LINES (f
));
2313 /* Pointers to glyph memory in glyph rows are exchanged during
2314 the update phase of redisplay, which means in general that a
2315 frame's current matrix consists of pointers into both the
2316 desired and current glyph pool of the frame. Adjusting a
2317 matrix sets the frame matrix up so that pointers are all into
2318 the same pool. If we want to preserve glyph contents of the
2319 current matrix over a call to adjust_glyph_matrix, we must
2320 make a copy of the current glyphs, and restore the current
2321 matrix' contents from that copy. */
2322 if (display_completed
2323 && !FRAME_GARBAGED_P (f
)
2324 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2325 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2327 struct glyph_matrix
*copy
= save_current_matrix (f
);
2328 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2329 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2330 restore_current_matrix (f
, copy
);
2331 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2335 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2336 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2337 SET_FRAME_GARBAGED (f
);
2343 /* Allocate/reallocate glyph matrices of a single frame F for
2344 window-based redisplay. */
2347 adjust_frame_glyphs_for_window_redisplay (f
)
2353 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2355 /* Get minimum sizes. */
2356 #ifdef HAVE_WINDOW_SYSTEM
2357 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2358 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2360 ch_dim
.width
= ch_dim
.height
= 1;
2363 /* Allocate/reallocate window matrices. */
2364 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2366 /* Allocate/ reallocate matrices of the dummy window used to display
2367 the menu bar under X when no X toolkit support is available. */
2368 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2370 /* Allocate a dummy window if not already done. */
2371 if (NILP (f
->menu_bar_window
))
2373 f
->menu_bar_window
= make_window ();
2374 w
= XWINDOW (f
->menu_bar_window
);
2375 XSETFRAME (w
->frame
, f
);
2376 w
->pseudo_window_p
= 1;
2379 w
= XWINDOW (f
->menu_bar_window
);
2381 /* Set window dimensions to frame dimensions and allocate or
2382 adjust glyph matrices of W. */
2383 XSETFASTINT (w
->top_line
, 0);
2384 XSETFASTINT (w
->left_col
, 0);
2385 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2386 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2387 allocate_matrices_for_window_redisplay (w
);
2389 #endif /* not USE_X_TOOLKIT */
2392 /* Allocate/ reallocate matrices of the tool bar window. If we
2393 don't have a tool bar window yet, make one. */
2394 if (NILP (f
->tool_bar_window
))
2396 f
->tool_bar_window
= make_window ();
2397 w
= XWINDOW (f
->tool_bar_window
);
2398 XSETFRAME (w
->frame
, f
);
2399 w
->pseudo_window_p
= 1;
2402 w
= XWINDOW (f
->tool_bar_window
);
2404 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2405 XSETFASTINT (w
->left_col
, 0);
2406 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2407 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2408 allocate_matrices_for_window_redisplay (w
);
2413 /* Adjust/ allocate message buffer of frame F.
2415 Note that the message buffer is never freed. Since I could not
2416 find a free in 19.34, I assume that freeing it would be
2417 problematic in some way and don't do it either.
2419 (Implementation note: It should be checked if we can free it
2420 eventually without causing trouble). */
2423 adjust_frame_message_buffer (f
)
2426 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2428 if (FRAME_MESSAGE_BUF (f
))
2430 char *buffer
= FRAME_MESSAGE_BUF (f
);
2431 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2432 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2435 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2439 /* Re-allocate buffer for decode_mode_spec on frame F. */
2442 adjust_decode_mode_spec_buffer (f
)
2445 f
->decode_mode_spec_buffer
2446 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2447 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2452 /**********************************************************************
2453 Freeing Glyph Matrices
2454 **********************************************************************/
2456 /* Free glyph memory for a frame F. F may be null. This function can
2457 be called for the same frame more than once. The root window of
2458 F may be nil when this function is called. This is the case when
2459 the function is called when F is destroyed. */
2465 if (f
&& f
->glyphs_initialized_p
)
2467 /* Block interrupt input so that we don't get surprised by an X
2468 event while we're in an inconsistent state. */
2470 f
->glyphs_initialized_p
= 0;
2472 /* Release window sub-matrices. */
2473 if (!NILP (f
->root_window
))
2474 free_window_matrices (XWINDOW (f
->root_window
));
2476 /* Free the dummy window for menu bars without X toolkit and its
2478 if (!NILP (f
->menu_bar_window
))
2480 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2481 free_glyph_matrix (w
->desired_matrix
);
2482 free_glyph_matrix (w
->current_matrix
);
2483 w
->desired_matrix
= w
->current_matrix
= NULL
;
2484 f
->menu_bar_window
= Qnil
;
2487 /* Free the tool bar window and its glyph matrices. */
2488 if (!NILP (f
->tool_bar_window
))
2490 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2491 free_glyph_matrix (w
->desired_matrix
);
2492 free_glyph_matrix (w
->current_matrix
);
2493 w
->desired_matrix
= w
->current_matrix
= NULL
;
2494 f
->tool_bar_window
= Qnil
;
2497 /* Release frame glyph matrices. Reset fields to zero in
2498 case we are called a second time. */
2499 if (f
->desired_matrix
)
2501 free_glyph_matrix (f
->desired_matrix
);
2502 free_glyph_matrix (f
->current_matrix
);
2503 f
->desired_matrix
= f
->current_matrix
= NULL
;
2506 /* Release glyph pools. */
2507 if (f
->desired_pool
)
2509 free_glyph_pool (f
->desired_pool
);
2510 free_glyph_pool (f
->current_pool
);
2511 f
->desired_pool
= f
->current_pool
= NULL
;
2519 /* Free glyph sub-matrices in the window tree rooted at W. This
2520 function may be called with a null pointer, and it may be called on
2521 the same tree more than once. */
2524 free_window_matrices (w
)
2529 if (!NILP (w
->hchild
))
2530 free_window_matrices (XWINDOW (w
->hchild
));
2531 else if (!NILP (w
->vchild
))
2532 free_window_matrices (XWINDOW (w
->vchild
));
2535 /* This is a leaf window. Free its memory and reset fields
2536 to zero in case this function is called a second time for
2538 free_glyph_matrix (w
->current_matrix
);
2539 free_glyph_matrix (w
->desired_matrix
);
2540 w
->current_matrix
= w
->desired_matrix
= NULL
;
2543 /* Next window on same level. */
2544 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2549 /* Check glyph memory leaks. This function is called from
2550 shut_down_emacs. Note that frames are not destroyed when Emacs
2551 exits. We therefore free all glyph memory for all active frames
2552 explicitly and check that nothing is left allocated. */
2555 check_glyph_memory ()
2557 Lisp_Object tail
, frame
;
2559 /* Free glyph memory for all frames. */
2560 FOR_EACH_FRAME (tail
, frame
)
2561 free_glyphs (XFRAME (frame
));
2563 /* Check that nothing is left allocated. */
2564 if (glyph_matrix_count
)
2566 if (glyph_pool_count
)
2572 /**********************************************************************
2573 Building a Frame Matrix
2574 **********************************************************************/
2576 /* Most of the redisplay code works on glyph matrices attached to
2577 windows. This is a good solution most of the time, but it is not
2578 suitable for terminal code. Terminal output functions cannot rely
2579 on being able to set an arbitrary terminal window. Instead they
2580 must be provided with a view of the whole frame, i.e. the whole
2581 screen. We build such a view by constructing a frame matrix from
2582 window matrices in this section.
2584 Windows that must be updated have their must_be_update_p flag set.
2585 For all such windows, their desired matrix is made part of the
2586 desired frame matrix. For other windows, their current matrix is
2587 made part of the desired frame matrix.
2589 +-----------------+----------------+
2590 | desired | desired |
2592 +-----------------+----------------+
2595 +----------------------------------+
2597 Desired window matrices can be made part of the frame matrix in a
2598 cheap way: We exploit the fact that the desired frame matrix and
2599 desired window matrices share their glyph memory. This is not
2600 possible for current window matrices. Their glyphs are copied to
2601 the desired frame matrix. The latter is equivalent to
2602 preserve_other_columns in the old redisplay.
2604 Used glyphs counters for frame matrix rows are the result of adding
2605 up glyph lengths of the window matrices. A line in the frame
2606 matrix is enabled, if a corresponding line in a window matrix is
2609 After building the desired frame matrix, it will be passed to
2610 terminal code, which will manipulate both the desired and current
2611 frame matrix. Changes applied to the frame's current matrix have
2612 to be visible in current window matrices afterwards, of course.
2614 This problem is solved like this:
2616 1. Window and frame matrices share glyphs. Window matrices are
2617 constructed in a way that their glyph contents ARE the glyph
2618 contents needed in a frame matrix. Thus, any modification of
2619 glyphs done in terminal code will be reflected in window matrices
2622 2. Exchanges of rows in a frame matrix done by terminal code are
2623 intercepted by hook functions so that corresponding row operations
2624 on window matrices can be performed. This is necessary because we
2625 use pointers to glyphs in glyph row structures. To satisfy the
2626 assumption of point 1 above that glyphs are updated implicitly in
2627 window matrices when they are manipulated via the frame matrix,
2628 window and frame matrix must of course agree where to find the
2629 glyphs for their rows. Possible manipulations that must be
2630 mirrored are assignments of rows of the desired frame matrix to the
2631 current frame matrix and scrolling the current frame matrix. */
2633 /* Build frame F's desired matrix from window matrices. Only windows
2634 which have the flag must_be_updated_p set have to be updated. Menu
2635 bar lines of a frame are not covered by window matrices, so make
2636 sure not to touch them in this function. */
2639 build_frame_matrix (f
)
2644 /* F must have a frame matrix when this function is called. */
2645 xassert (!FRAME_WINDOW_P (f
));
2647 /* Clear all rows in the frame matrix covered by window matrices.
2648 Menu bar lines are not covered by windows. */
2649 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2650 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2652 /* Build the matrix by walking the window tree. */
2653 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2654 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2658 /* Walk a window tree, building a frame matrix MATRIX from window
2659 matrices. W is the root of a window tree. */
2662 build_frame_matrix_from_window_tree (matrix
, w
)
2663 struct glyph_matrix
*matrix
;
2668 if (!NILP (w
->hchild
))
2669 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2670 else if (!NILP (w
->vchild
))
2671 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2673 build_frame_matrix_from_leaf_window (matrix
, w
);
2675 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2680 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2681 desired frame matrix built. W is a leaf window whose desired or
2682 current matrix is to be added to FRAME_MATRIX. W's flag
2683 must_be_updated_p determines which matrix it contributes to
2684 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2685 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2686 Adding a desired matrix means setting up used counters and such in
2687 frame rows, while adding a current window matrix to FRAME_MATRIX
2688 means copying glyphs. The latter case corresponds to
2689 preserve_other_columns in the old redisplay. */
2692 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2693 struct glyph_matrix
*frame_matrix
;
2696 struct glyph_matrix
*window_matrix
;
2697 int window_y
, frame_y
;
2698 /* If non-zero, a glyph to insert at the right border of W. */
2699 GLYPH right_border_glyph
= 0;
2701 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2702 if (w
->must_be_updated_p
)
2704 window_matrix
= w
->desired_matrix
;
2706 /* Decide whether we want to add a vertical border glyph. */
2707 if (!WINDOW_RIGHTMOST_P (w
))
2709 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2710 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2711 ? XINT (DISP_BORDER_GLYPH (dp
))
2716 window_matrix
= w
->current_matrix
;
2718 /* For all rows in the window matrix and corresponding rows in the
2721 frame_y
= window_matrix
->matrix_y
;
2722 while (window_y
< window_matrix
->nrows
)
2724 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2725 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2726 int current_row_p
= window_matrix
== w
->current_matrix
;
2728 /* Fill up the frame row with spaces up to the left margin of the
2730 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2732 /* Fill up areas in the window matrix row with spaces. */
2733 fill_up_glyph_row_with_spaces (window_row
);
2735 /* If only part of W's desired matrix has been built, and
2736 window_row wasn't displayed, use the corresponding current
2738 if (window_matrix
== w
->desired_matrix
2739 && !window_row
->enabled_p
)
2741 window_row
= w
->current_matrix
->rows
+ window_y
;
2747 /* Copy window row to frame row. */
2748 bcopy (window_row
->glyphs
[0],
2749 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2750 window_matrix
->matrix_w
* sizeof (struct glyph
));
2754 xassert (window_row
->enabled_p
);
2756 /* Only when a desired row has been displayed, we want
2757 the corresponding frame row to be updated. */
2758 frame_row
->enabled_p
= 1;
2760 /* Maybe insert a vertical border between horizontally adjacent
2762 if (right_border_glyph
)
2764 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2765 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2768 /* Window row window_y must be a slice of frame row
2770 xassert (glyph_row_slice_p (window_row
, frame_row
));
2772 /* If rows are in sync, we don't have to copy glyphs because
2773 frame and window share glyphs. */
2776 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2777 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2781 /* Set number of used glyphs in the frame matrix. Since we fill
2782 up with spaces, and visit leaf windows from left to right it
2783 can be done simply. */
2784 frame_row
->used
[TEXT_AREA
]
2785 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2794 /* Add spaces to a glyph row ROW in a window matrix.
2796 Each row has the form:
2798 +---------+-----------------------------+------------+
2799 | left | text | right |
2800 +---------+-----------------------------+------------+
2802 Left and right marginal areas are optional. This function adds
2803 spaces to areas so that there are no empty holes between areas.
2804 In other words: If the right area is not empty, the text area
2805 is filled up with spaces up to the right area. If the text area
2806 is not empty, the left area is filled up.
2808 To be called for frame-based redisplay, only. */
2811 fill_up_glyph_row_with_spaces (row
)
2812 struct glyph_row
*row
;
2814 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2815 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2816 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2820 /* Fill area AREA of glyph row ROW with spaces. To be called for
2821 frame-based redisplay only. */
2824 fill_up_glyph_row_area_with_spaces (row
, area
)
2825 struct glyph_row
*row
;
2828 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2830 struct glyph
*end
= row
->glyphs
[area
+ 1];
2831 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2834 *text
++ = space_glyph
;
2835 row
->used
[area
] = text
- row
->glyphs
[area
];
2840 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2841 reached. In frame matrices only one area, TEXT_AREA, is used. */
2844 fill_up_frame_row_with_spaces (row
, upto
)
2845 struct glyph_row
*row
;
2848 int i
= row
->used
[TEXT_AREA
];
2849 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2852 glyph
[i
++] = space_glyph
;
2854 row
->used
[TEXT_AREA
] = i
;
2859 /**********************************************************************
2860 Mirroring operations on frame matrices in window matrices
2861 **********************************************************************/
2863 /* Set frame being updated via frame-based redisplay to F. This
2864 function must be called before updates to make explicit that we are
2865 working on frame matrices or not. */
2868 set_frame_matrix_frame (f
)
2871 frame_matrix_frame
= f
;
2875 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2876 DESIRED_MATRIX is the desired matrix corresponding to
2877 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2878 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2879 frame_matrix_frame is non-null, this indicates that the exchange is
2880 done in frame matrices, and that we have to perform analogous
2881 operations in window matrices of frame_matrix_frame. */
2884 make_current (desired_matrix
, current_matrix
, row
)
2885 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2888 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2889 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2890 int mouse_face_p
= current_row
->mouse_face_p
;
2892 /* Do current_row = desired_row. This exchanges glyph pointers
2893 between both rows, and does a structure assignment otherwise. */
2894 assign_row (current_row
, desired_row
);
2896 /* Enable current_row to mark it as valid. */
2897 current_row
->enabled_p
= 1;
2898 current_row
->mouse_face_p
= mouse_face_p
;
2900 /* If we are called on frame matrices, perform analogous operations
2901 for window matrices. */
2902 if (frame_matrix_frame
)
2903 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2907 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2908 W's frame which has been made current (by swapping pointers between
2909 current and desired matrix). Perform analogous operations in the
2910 matrices of leaf windows in the window tree rooted at W. */
2913 mirror_make_current (w
, frame_row
)
2919 if (!NILP (w
->hchild
))
2920 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2921 else if (!NILP (w
->vchild
))
2922 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2925 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2926 here because the checks performed in debug mode there
2927 will not allow the conversion. */
2928 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2930 /* If FRAME_ROW is within W, assign the desired row to the
2931 current row (exchanging glyph pointers). */
2932 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2934 struct glyph_row
*current_row
2935 = MATRIX_ROW (w
->current_matrix
, row
);
2936 struct glyph_row
*desired_row
2937 = MATRIX_ROW (w
->desired_matrix
, row
);
2939 if (desired_row
->enabled_p
)
2940 assign_row (current_row
, desired_row
);
2942 swap_glyph_pointers (desired_row
, current_row
);
2943 current_row
->enabled_p
= 1;
2947 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2952 /* Perform row dance after scrolling. We are working on the range of
2953 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2954 including) in MATRIX. COPY_FROM is a vector containing, for each
2955 row I in the range 0 <= I < NLINES, the index of the original line
2956 to move to I. This index is relative to the row range, i.e. 0 <=
2957 index < NLINES. RETAINED_P is a vector containing zero for each
2958 row 0 <= I < NLINES which is empty.
2960 This function is called from do_scrolling and do_direct_scrolling. */
2963 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2965 struct glyph_matrix
*matrix
;
2966 int unchanged_at_top
, nlines
;
2970 /* A copy of original rows. */
2971 struct glyph_row
*old_rows
;
2973 /* Rows to assign to. */
2974 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2978 /* Make a copy of the original rows. */
2979 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2980 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2982 /* Assign new rows, maybe clear lines. */
2983 for (i
= 0; i
< nlines
; ++i
)
2985 int enabled_before_p
= new_rows
[i
].enabled_p
;
2987 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2988 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2989 new_rows
[i
] = old_rows
[copy_from
[i
]];
2990 new_rows
[i
].enabled_p
= enabled_before_p
;
2992 /* RETAINED_P is zero for empty lines. */
2993 if (!retained_p
[copy_from
[i
]])
2994 new_rows
[i
].enabled_p
= 0;
2997 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2998 if (frame_matrix_frame
)
2999 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3000 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3004 /* Synchronize glyph pointers in the current matrix of window W with
3005 the current frame matrix. */
3008 sync_window_with_frame_matrix_rows (w
)
3011 struct frame
*f
= XFRAME (w
->frame
);
3012 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3013 int left
, right
, x
, width
;
3015 /* Preconditions: W must be a leaf window on a tty frame. */
3016 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3017 xassert (!FRAME_WINDOW_P (f
));
3019 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3020 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3021 x
= w
->current_matrix
->matrix_x
;
3022 width
= w
->current_matrix
->matrix_w
;
3024 window_row
= w
->current_matrix
->rows
;
3025 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3026 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3028 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3030 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3031 = frame_row
->glyphs
[0] + x
;
3032 window_row
->glyphs
[TEXT_AREA
]
3033 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3034 window_row
->glyphs
[LAST_AREA
]
3035 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3036 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3037 = window_row
->glyphs
[LAST_AREA
] - right
;
3042 /* Return the window in the window tree rooted in W containing frame
3043 row ROW. Value is null if none is found. */
3046 frame_row_to_window (w
, row
)
3050 struct window
*found
= NULL
;
3054 if (!NILP (w
->hchild
))
3055 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3056 else if (!NILP (w
->vchild
))
3057 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3058 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3059 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3062 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3069 /* Perform a line dance in the window tree rooted at W, after
3070 scrolling a frame matrix in mirrored_line_dance.
3072 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3073 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3074 COPY_FROM is a vector containing, for each row I in the range 0 <=
3075 I < NLINES, the index of the original line to move to I. This
3076 index is relative to the row range, i.e. 0 <= index < NLINES.
3077 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3081 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3083 int unchanged_at_top
, nlines
;
3089 if (!NILP (w
->hchild
))
3090 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3091 nlines
, copy_from
, retained_p
);
3092 else if (!NILP (w
->vchild
))
3093 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3094 nlines
, copy_from
, retained_p
);
3097 /* W is a leaf window, and we are working on its current
3099 struct glyph_matrix
*m
= w
->current_matrix
;
3101 struct glyph_row
*old_rows
;
3103 /* Make a copy of the original rows of matrix m. */
3104 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3105 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3107 for (i
= 0; i
< nlines
; ++i
)
3109 /* Frame relative line assigned to. */
3110 int frame_to
= i
+ unchanged_at_top
;
3112 /* Frame relative line assigned. */
3113 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3115 /* Window relative line assigned to. */
3116 int window_to
= frame_to
- m
->matrix_y
;
3118 /* Window relative line assigned. */
3119 int window_from
= frame_from
- m
->matrix_y
;
3121 /* Is assigned line inside window? */
3122 int from_inside_window_p
3123 = window_from
>= 0 && window_from
< m
->matrix_h
;
3125 /* Is assigned to line inside window? */
3126 int to_inside_window_p
3127 = window_to
>= 0 && window_to
< m
->matrix_h
;
3129 if (from_inside_window_p
&& to_inside_window_p
)
3131 /* Enabled setting before assignment. */
3132 int enabled_before_p
;
3134 /* Do the assignment. The enabled_p flag is saved
3135 over the assignment because the old redisplay did
3137 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3138 m
->rows
[window_to
] = old_rows
[window_from
];
3139 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3141 /* If frame line is empty, window line is empty, too. */
3142 if (!retained_p
[copy_from
[i
]])
3143 m
->rows
[window_to
].enabled_p
= 0;
3145 else if (to_inside_window_p
)
3147 /* A copy between windows. This is an infrequent
3148 case not worth optimizing. */
3149 struct frame
*f
= XFRAME (w
->frame
);
3150 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3152 struct glyph_matrix
*m2
;
3155 w2
= frame_row_to_window (root
, frame_to
);
3156 m2
= w2
->current_matrix
;
3157 m2_from
= frame_from
- m2
->matrix_y
;
3158 copy_row_except_pointers (m
->rows
+ window_to
,
3159 m2
->rows
+ m2_from
);
3161 /* If frame line is empty, window line is empty, too. */
3162 if (!retained_p
[copy_from
[i
]])
3163 m
->rows
[window_to
].enabled_p
= 0;
3166 else if (from_inside_window_p
)
3170 /* If there was a copy between windows, make sure glyph
3171 pointers are in sync with the frame matrix. */
3173 sync_window_with_frame_matrix_rows (w
);
3175 /* Check that no pointers are lost. */
3179 /* Next window on same level. */
3180 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3187 /* Check that window and frame matrices agree about their
3188 understanding where glyphs of the rows are to find. For each
3189 window in the window tree rooted at W, check that rows in the
3190 matrices of leaf window agree with their frame matrices about
3194 check_window_matrix_pointers (w
)
3199 if (!NILP (w
->hchild
))
3200 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3201 else if (!NILP (w
->vchild
))
3202 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3205 struct frame
*f
= XFRAME (w
->frame
);
3206 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3207 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3210 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3215 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3216 a window and FRAME_MATRIX is the corresponding frame matrix. For
3217 each row in WINDOW_MATRIX check that it's a slice of the
3218 corresponding frame row. If it isn't, abort. */
3221 check_matrix_pointers (window_matrix
, frame_matrix
)
3222 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3224 /* Row number in WINDOW_MATRIX. */
3227 /* Row number corresponding to I in FRAME_MATRIX. */
3228 int j
= window_matrix
->matrix_y
;
3230 /* For all rows check that the row in the window matrix is a
3231 slice of the row in the frame matrix. If it isn't we didn't
3232 mirror an operation on the frame matrix correctly. */
3233 while (i
< window_matrix
->nrows
)
3235 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3236 frame_matrix
->rows
+ j
))
3242 #endif /* GLYPH_DEBUG != 0 */
3246 /**********************************************************************
3247 VPOS and HPOS translations
3248 **********************************************************************/
3252 /* Translate vertical position VPOS which is relative to window W to a
3253 vertical position relative to W's frame. */
3256 window_to_frame_vpos (w
, vpos
)
3260 struct frame
*f
= XFRAME (w
->frame
);
3262 xassert (!FRAME_WINDOW_P (f
));
3263 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3264 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3265 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3270 /* Translate horizontal position HPOS which is relative to window W to
3271 a horizontal position relative to W's frame. */
3274 window_to_frame_hpos (w
, hpos
)
3278 struct frame
*f
= XFRAME (w
->frame
);
3280 xassert (!FRAME_WINDOW_P (f
));
3281 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3285 #endif /* GLYPH_DEBUG */
3289 /**********************************************************************
3291 **********************************************************************/
3293 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3294 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3300 CHECK_LIVE_FRAME (frame
);
3303 /* Ignore redraw requests, if frame has no glyphs yet.
3304 (Implementation note: It still has to be checked why we are
3305 called so early here). */
3306 if (!glyphs_initialized_initially_p
)
3310 if (FRAME_MSDOS_P (f
))
3311 set_terminal_modes ();
3313 clear_current_matrices (f
);
3315 if (FRAME_TERMCAP_P (f
))
3316 fflush (TTY_OUTPUT (FRAME_TTY (f
)));
3317 windows_or_buffers_changed
++;
3318 /* Mark all windows as inaccurate, so that every window will have
3319 its redisplay done. */
3320 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3321 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3327 /* Redraw frame F. This is nothing more than a call to the Lisp
3328 function redraw-frame. */
3335 XSETFRAME (frame
, f
);
3336 Fredraw_frame (frame
);
3340 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3341 doc
: /* Clear and redisplay all visible frames. */)
3344 Lisp_Object tail
, frame
;
3346 FOR_EACH_FRAME (tail
, frame
)
3347 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3348 Fredraw_frame (frame
);
3354 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3355 visible frames marked as garbaged. */
3358 redraw_garbaged_frames ()
3360 Lisp_Object tail
, frame
;
3362 FOR_EACH_FRAME (tail
, frame
)
3363 if (FRAME_VISIBLE_P (XFRAME (frame
))
3364 && FRAME_GARBAGED_P (XFRAME (frame
)))
3365 Fredraw_frame (frame
);
3370 /***********************************************************************
3372 ***********************************************************************/
3374 /* Try to update display and current glyph matrix directly.
3376 This function is called after a character G has been inserted into
3377 current_buffer. It tries to update the current glyph matrix and
3378 perform appropriate screen output to reflect the insertion. If it
3379 succeeds, the global flag redisplay_performed_directly_p will be
3380 set to 1, and thereby prevent the more costly general redisplay
3381 from running (see redisplay_internal).
3383 This function is not called for `hairy' character insertions.
3384 In particular, it is not called when after or before change
3385 functions exist, like they are used by font-lock. See keyboard.c
3386 for details where this function is called. */
3389 direct_output_for_insert (g
)
3392 register struct frame
*f
= SELECTED_FRAME ();
3393 struct window
*w
= XWINDOW (selected_window
);
3395 struct glyph_row
*glyph_row
;
3396 struct glyph
*glyphs
, *glyph
, *end
;
3398 /* Non-null means that redisplay of W is based on window matrices. */
3399 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3400 /* Non-null means we are in overwrite mode. */
3401 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3403 struct text_pos pos
;
3404 int delta
, delta_bytes
;
3406 /* Not done directly. */
3407 redisplay_performed_directly_p
= 0;
3409 /* Quickly give up for some common cases. */
3410 if (cursor_in_echo_area
3411 /* Give up if fonts have changed. */
3413 /* Give up if face attributes have been changed. */
3414 || face_change_count
3415 /* Give up if cursor position not really known. */
3416 || !display_completed
3417 /* Give up if buffer appears in two places. */
3418 || buffer_shared
> 1
3419 /* Give up if currently displaying a message instead of the
3420 minibuffer contents. */
3421 || (EQ (selected_window
, minibuf_window
)
3422 && EQ (minibuf_window
, echo_area_window
))
3423 /* Give up for hscrolled mini-buffer because display of the prompt
3424 is handled specially there (see display_line). */
3425 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3426 /* Give up if overwriting in the middle of a line. */
3429 && FETCH_BYTE (PT
) != '\n')
3430 /* Give up for tabs and line ends. */
3434 /* Give up if unable to display the cursor in the window. */
3435 || w
->cursor
.vpos
< 0
3436 /* Give up if we are showing a message or just cleared the message
3437 because we might need to resize the echo area window. */
3438 || !NILP (echo_area_buffer
[0])
3439 || !NILP (echo_area_buffer
[1])
3440 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3441 /* Can't do it in a continued line because continuation
3442 lines would change. */
3443 (glyph_row
->continued_p
3444 /* Can't use this method if the line overlaps others or is
3445 overlapped by others because these other lines would
3446 have to be redisplayed. */
3447 || glyph_row
->overlapping_p
3448 || glyph_row
->overlapped_p
))
3449 /* Can't do it for partial width windows on terminal frames
3450 because we can't clear to eol in such a window. */
3451 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3454 /* If we can't insert glyphs, we can use this method only
3455 at the end of a line. */
3456 if (!FRAME_CHAR_INS_DEL_OK (f
))
3457 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3460 /* Set up a display iterator structure for W. Glyphs will be
3461 produced in scratch_glyph_row. Current position is W's cursor
3463 clear_glyph_row (&scratch_glyph_row
);
3464 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3465 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3466 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3469 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3470 if (glyph_row
->mouse_face_p
)
3473 /* Give up if highlighting trailing whitespace and we have trailing
3474 whitespace in glyph_row. We would have to remove the trailing
3475 whitespace face in that case. */
3476 if (!NILP (Vshow_trailing_whitespace
)
3477 && glyph_row
->used
[TEXT_AREA
])
3481 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3482 if (last
->type
== STRETCH_GLYPH
3483 || (last
->type
== CHAR_GLYPH
3484 && last
->u
.ch
== ' '))
3488 /* Give up if there are overlay strings at pos. This would fail
3489 if the overlay string has newlines in it. */
3490 if (STRINGP (it
.string
))
3493 it
.hpos
= w
->cursor
.hpos
;
3494 it
.vpos
= w
->cursor
.vpos
;
3495 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3496 it
.current_y
= w
->cursor
.y
;
3497 it
.end_charpos
= PT
;
3498 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3499 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3501 /* More than one display element may be returned for PT - 1 if
3502 (i) it's a control character which is translated into `\003' or
3503 `^C', or (ii) it has a display table entry, or (iii) it's a
3504 combination of both. */
3505 delta
= delta_bytes
= 0;
3506 while (get_next_display_element (&it
))
3508 PRODUCE_GLYPHS (&it
);
3510 /* Give up if glyph doesn't fit completely on the line. */
3511 if (it
.current_x
>= it
.last_visible_x
)
3514 /* Give up if new glyph has different ascent or descent than
3515 the original row, or if it is not a character glyph. */
3516 if (glyph_row
->ascent
!= it
.ascent
3517 || glyph_row
->height
!= it
.ascent
+ it
.descent
3518 || glyph_row
->phys_ascent
!= it
.phys_ascent
3519 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3520 || it
.what
!= IT_CHARACTER
)
3524 delta_bytes
+= it
.len
;
3525 set_iterator_to_next (&it
, 1);
3528 /* Give up if we hit the right edge of the window. We would have
3529 to insert truncation or continuation glyphs. */
3530 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3531 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3534 /* Give up if there is a \t following in the line. */
3536 it2
.end_charpos
= ZV
;
3537 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3538 while (get_next_display_element (&it2
)
3539 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3543 set_iterator_to_next (&it2
, 1);
3546 /* Number of new glyphs produced. */
3547 n
= it
.glyph_row
->used
[TEXT_AREA
];
3549 /* Start and end of glyphs in original row. */
3550 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3551 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3553 /* Make room for new glyphs, then insert them. */
3554 xassert (end
- glyphs
- n
>= 0);
3555 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3556 (end
- glyphs
- n
) * sizeof (*end
));
3557 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3558 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3559 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3561 /* Compute new line width. */
3562 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3563 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3564 glyph_row
->pixel_width
= glyph_row
->x
;
3567 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3571 /* Increment buffer positions for glyphs following the newly
3573 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3574 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3575 glyph
->charpos
+= delta
;
3577 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3579 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3580 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3583 /* Adjust positions in lines following the one we are in. */
3584 increment_matrix_positions (w
->current_matrix
,
3586 w
->current_matrix
->nrows
,
3587 delta
, delta_bytes
);
3589 glyph_row
->contains_overlapping_glyphs_p
3590 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3592 glyph_row
->displays_text_p
= 1;
3593 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3594 XFASTINT (w
->window_end_vpos
)));
3596 if (!NILP (Vshow_trailing_whitespace
))
3597 highlight_trailing_whitespace (it
.f
, glyph_row
);
3599 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3600 In the middle, we have to insert glyphs. Note that this is now
3601 implemented for X frames. The implementation uses updated_window
3603 updated_row
= glyph_row
;
3604 updated_area
= TEXT_AREA
;
3608 FRAME_RIF (f
)->update_window_begin_hook (w
);
3610 if (glyphs
== end
- n
3611 /* In front of a space added by append_space. */
3612 || (glyphs
== end
- n
- 1
3613 && (end
- n
)->charpos
<= 0))
3614 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3616 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3620 if (glyphs
== end
- n
)
3621 write_glyphs (glyphs
, n
);
3623 insert_glyphs (glyphs
, n
);
3626 w
->cursor
.hpos
+= n
;
3627 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3628 xassert (w
->cursor
.hpos
>= 0
3629 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3631 /* How to set the cursor differs depending on whether we are
3632 using a frame matrix or a window matrix. Note that when
3633 a frame matrix is used, cursor_to expects frame coordinates,
3634 and the X and Y parameters are not used. */
3635 if (window_redisplay_p
)
3636 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3637 w
->cursor
.y
, w
->cursor
.x
);
3641 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3642 + (INTEGERP (w
->left_margin_cols
)
3643 ? XFASTINT (w
->left_margin_cols
)
3645 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3650 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3653 if (FRAME_TERMCAP_P (f
))
3654 fflush (TTY_OUTPUT (FRAME_TTY (f
)));
3656 TRACE ((stderr
, "direct output for insert\n"));
3657 mark_window_display_accurate (it
.window
, 1);
3658 redisplay_performed_directly_p
= 1;
3663 /* Perform a direct display update for moving PT by N positions
3664 left or right. N < 0 means a movement backwards. This function
3665 is currently only called for N == 1 or N == -1. */
3668 direct_output_forward_char (n
)
3671 struct frame
*f
= SELECTED_FRAME ();
3672 struct window
*w
= XWINDOW (selected_window
);
3673 struct glyph_row
*row
;
3675 /* Give up if point moved out of or into a composition. */
3676 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3677 current_buffer
, PT
))
3680 /* Give up if face attributes have been changed. */
3681 if (face_change_count
)
3684 /* Give up if current matrix is not up to date or we are
3685 displaying a message. */
3686 if (!display_completed
|| cursor_in_echo_area
)
3689 /* Give up if the buffer's direction is reversed. */
3690 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3693 /* Can't use direct output if highlighting a region. */
3694 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3697 /* Can't use direct output if highlighting trailing whitespace. */
3698 if (!NILP (Vshow_trailing_whitespace
))
3701 /* Give up if we are showing a message or just cleared the message
3702 because we might need to resize the echo area window. */
3703 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3706 /* Give up if currently displaying a message instead of the
3707 minibuffer contents. */
3708 if (XWINDOW (minibuf_window
) == w
3709 && EQ (minibuf_window
, echo_area_window
))
3712 /* Give up if we don't know where the cursor is. */
3713 if (w
->cursor
.vpos
< 0)
3716 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3718 /* Give up if PT is outside of the last known cursor row. */
3719 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3720 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3723 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3725 w
->last_cursor
= w
->cursor
;
3726 XSETFASTINT (w
->last_point
, PT
);
3728 xassert (w
->cursor
.hpos
>= 0
3729 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3731 if (FRAME_WINDOW_P (f
))
3732 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3733 w
->cursor
.y
, w
->cursor
.x
);
3737 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3738 + (INTEGERP (w
->left_margin_cols
)
3739 ? XFASTINT (w
->left_margin_cols
)
3741 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3745 if (FRAME_TERMCAP_P (f
))
3746 fflush (TTY_OUTPUT (FRAME_TTY (f
)));
3747 redisplay_performed_directly_p
= 1;
3753 /***********************************************************************
3755 ***********************************************************************/
3757 /* Update frame F based on the data in desired matrices.
3759 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3760 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3763 Value is non-zero if redisplay was stopped due to pending input. */
3766 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3769 int inhibit_hairy_id_p
;
3771 /* 1 means display has been paused because of pending input. */
3773 struct window
*root_window
= XWINDOW (f
->root_window
);
3775 if (FRAME_WINDOW_P (f
))
3777 /* We are working on window matrix basis. All windows whose
3778 flag must_be_updated_p is set have to be updated. */
3780 /* Record that we are not working on frame matrices. */
3781 set_frame_matrix_frame (NULL
);
3783 /* Update all windows in the window tree of F, maybe stopping
3784 when pending input is detected. */
3787 /* Update the menu bar on X frames that don't have toolkit
3789 if (WINDOWP (f
->menu_bar_window
))
3790 update_window (XWINDOW (f
->menu_bar_window
), 1);
3792 /* Update the tool-bar window, if present. */
3793 if (WINDOWP (f
->tool_bar_window
))
3795 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3797 /* Update tool-bar window. */
3798 if (w
->must_be_updated_p
)
3802 update_window (w
, 1);
3803 w
->must_be_updated_p
= 0;
3805 /* Swap tool-bar strings. We swap because we want to
3807 tem
= f
->current_tool_bar_string
;
3808 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3809 f
->desired_tool_bar_string
= tem
;
3814 /* Update windows. */
3815 paused_p
= update_window_tree (root_window
, force_p
);
3818 #if 0 /* This flush is a performance bottleneck under X,
3819 and it doesn't seem to be necessary anyway. */
3820 FRAME_RIF (f
)->flush_display (f
);
3825 /* We are working on frame matrix basis. Set the frame on whose
3826 frame matrix we operate. */
3827 set_frame_matrix_frame (f
);
3829 /* Build F's desired matrix from window matrices. */
3830 build_frame_matrix (f
);
3832 /* Update the display */
3834 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3837 if (TTY_TERMSCRIPT (FRAME_TTY (f
)))
3838 fflush (TTY_TERMSCRIPT (FRAME_TTY (f
)));
3839 fflush (TTY_OUTPUT (FRAME_TTY (f
)));
3841 /* Check window matrices for lost pointers. */
3843 check_window_matrix_pointers (root_window
);
3844 add_frame_display_history (f
, paused_p
);
3848 /* Reset flags indicating that a window should be updated. */
3849 set_window_update_flags (root_window
, 0);
3851 display_completed
= !paused_p
;
3857 /************************************************************************
3858 Window-based updates
3859 ************************************************************************/
3861 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3862 don't stop updating when input is pending. */
3865 update_window_tree (w
, force_p
)
3871 while (w
&& !paused_p
)
3873 if (!NILP (w
->hchild
))
3874 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3875 else if (!NILP (w
->vchild
))
3876 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3877 else if (w
->must_be_updated_p
)
3878 paused_p
|= update_window (w
, force_p
);
3880 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3887 /* Update window W if its flag must_be_updated_p is non-zero. If
3888 FORCE_P is non-zero, don't stop updating if input is pending. */
3891 update_single_window (w
, force_p
)
3895 if (w
->must_be_updated_p
)
3897 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3899 /* Record that this is not a frame-based redisplay. */
3900 set_frame_matrix_frame (NULL
);
3904 update_window (w
, force_p
);
3907 /* Reset flag in W. */
3908 w
->must_be_updated_p
= 0;
3913 /* Redraw lines from the current matrix of window W that are
3914 overlapped by other rows. YB is bottom-most y-position in W. */
3917 redraw_overlapped_rows (w
, yb
)
3922 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3924 /* If rows overlapping others have been changed, the rows being
3925 overlapped have to be redrawn. This won't draw lines that have
3926 already been drawn in update_window_line because overlapped_p in
3927 desired rows is 0, so after row assignment overlapped_p in
3928 current rows is 0. */
3929 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3931 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3933 if (!row
->enabled_p
)
3935 else if (row
->mode_line_p
)
3938 if (row
->overlapped_p
)
3940 enum glyph_row_area area
;
3942 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3945 updated_area
= area
;
3946 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3947 area
== TEXT_AREA
? row
->x
: 0);
3948 if (row
->used
[area
])
3949 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3951 FRAME_RIF (f
)->clear_end_of_line (-1);
3954 row
->overlapped_p
= 0;
3957 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3963 /* Redraw lines from the current matrix of window W that overlap
3964 others. YB is bottom-most y-position in W. */
3967 redraw_overlapping_rows (w
, yb
)
3972 struct glyph_row
*row
;
3973 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3975 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3977 row
= w
->current_matrix
->rows
+ i
;
3979 if (!row
->enabled_p
)
3981 else if (row
->mode_line_p
)
3984 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3986 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3988 if (row
->used
[LEFT_MARGIN_AREA
])
3989 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3991 if (row
->used
[TEXT_AREA
])
3992 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3994 if (row
->used
[RIGHT_MARGIN_AREA
])
3995 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3997 /* Record in neighbour rows that ROW overwrites part of their
3999 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4000 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4001 if ((row
->phys_height
- row
->phys_ascent
4002 > row
->height
- row
->ascent
)
4004 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4015 /* Check that no row in the current matrix of window W is enabled
4016 which is below what's displayed in the window. */
4019 check_current_matrix_flags (w
)
4022 int last_seen_p
= 0;
4023 int i
, yb
= window_text_bottom_y (w
);
4025 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4027 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4028 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4030 else if (last_seen_p
&& row
->enabled_p
)
4035 #endif /* GLYPH_DEBUG */
4038 /* Update display of window W. FORCE_P non-zero means that we should
4039 not stop when detecting pending input. */
4042 update_window (w
, force_p
)
4046 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4048 int preempt_count
= baud_rate
/ 2400 + 1;
4049 extern int input_pending
;
4050 extern Lisp_Object do_mouse_tracking
;
4052 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4054 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4056 /* Check that W's frame doesn't have glyph matrices. */
4057 xassert (FRAME_WINDOW_P (f
));
4058 xassert (updating_frame
!= NULL
);
4060 /* Check pending input the first time so that we can quickly return. */
4061 if (redisplay_dont_pause
)
4064 detect_input_pending ();
4066 /* If forced to complete the update, or if no input is pending, do
4068 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4070 struct glyph_row
*row
, *end
;
4071 struct glyph_row
*mode_line_row
;
4072 struct glyph_row
*header_line_row
;
4073 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4075 rif
->update_window_begin_hook (w
);
4076 yb
= window_text_bottom_y (w
);
4078 /* If window has a header line, update it before everything else.
4079 Adjust y-positions of other rows by the header line height. */
4080 row
= desired_matrix
->rows
;
4081 end
= row
+ desired_matrix
->nrows
- 1;
4083 if (row
->mode_line_p
)
4085 header_line_row
= row
;
4089 header_line_row
= NULL
;
4091 /* Update the mode line, if necessary. */
4092 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4093 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4095 mode_line_row
->y
= yb
;
4096 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4098 &mouse_face_overwritten_p
);
4102 /* Find first enabled row. Optimizations in redisplay_internal
4103 may lead to an update with only one row enabled. There may
4104 be also completely empty matrices. */
4105 while (row
< end
&& !row
->enabled_p
)
4108 /* Try reusing part of the display by copying. */
4109 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4111 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4114 /* All rows were found to be equal. */
4119 /* We've scrolled the display. */
4124 /* Update the header line after scrolling because a new header
4125 line would otherwise overwrite lines at the top of the window
4126 that can be scrolled. */
4127 if (header_line_row
&& header_line_row
->enabled_p
)
4129 header_line_row
->y
= 0;
4130 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4134 /* Update the rest of the lines. */
4135 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4138 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4141 /* We'll have to play a little bit with when to
4142 detect_input_pending. If it's done too often,
4143 scrolling large windows with repeated scroll-up
4144 commands will too quickly pause redisplay. */
4145 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4146 detect_input_pending ();
4148 changed_p
|= update_window_line (w
, vpos
,
4149 &mouse_face_overwritten_p
);
4151 /* Mark all rows below the last visible one in the current
4152 matrix as invalid. This is necessary because of
4153 variable line heights. Consider the case of three
4154 successive redisplays, where the first displays 5
4155 lines, the second 3 lines, and the third 5 lines again.
4156 If the second redisplay wouldn't mark rows in the
4157 current matrix invalid, the third redisplay might be
4158 tempted to optimize redisplay based on lines displayed
4159 in the first redisplay. */
4160 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4161 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4162 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4165 /* Was display preempted? */
4166 paused_p
= row
< end
;
4170 /* Fix the appearance of overlapping/overlapped rows. */
4171 if (!paused_p
&& !w
->pseudo_window_p
)
4173 if (changed_p
&& rif
->fix_overlapping_area
)
4175 redraw_overlapped_rows (w
, yb
);
4176 redraw_overlapping_rows (w
, yb
);
4179 /* Make cursor visible at cursor position of W. */
4180 set_window_cursor_after_update (w
);
4182 #if 0 /* Check that current matrix invariants are satisfied. This is
4183 for debugging only. See the comment of check_matrix_invariants. */
4184 IF_DEBUG (check_matrix_invariants (w
));
4189 /* Remember the redisplay method used to display the matrix. */
4190 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4193 /* End the update of window W. Don't set the cursor if we
4194 paused updating the display because in this case,
4195 set_window_cursor_after_update hasn't been called, and
4196 output_cursor doesn't contain the cursor location. */
4197 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4203 /* check_current_matrix_flags (w); */
4204 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4207 clear_glyph_matrix (desired_matrix
);
4213 /* Update the display of area AREA in window W, row number VPOS.
4214 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4217 update_marginal_area (w
, area
, vpos
)
4221 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4222 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4224 /* Let functions in xterm.c know what area subsequent X positions
4225 will be relative to. */
4226 updated_area
= area
;
4228 /* Set cursor to start of glyphs, write them, and clear to the end
4229 of the area. I don't think that something more sophisticated is
4230 necessary here, since marginal areas will not be the default. */
4231 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4232 if (desired_row
->used
[area
])
4233 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4234 rif
->clear_end_of_line (-1);
4238 /* Update the display of the text area of row VPOS in window W.
4239 Value is non-zero if display has changed. */
4242 update_text_area (w
, vpos
)
4246 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4247 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4248 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4251 /* Let functions in xterm.c know what area subsequent X positions
4252 will be relative to. */
4253 updated_area
= TEXT_AREA
;
4255 /* If rows are at different X or Y, or rows have different height,
4256 or the current row is marked invalid, write the entire line. */
4257 if (!current_row
->enabled_p
4258 || desired_row
->y
!= current_row
->y
4259 || desired_row
->ascent
!= current_row
->ascent
4260 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4261 || desired_row
->phys_height
!= current_row
->phys_height
4262 || desired_row
->visible_height
!= current_row
->visible_height
4263 || current_row
->overlapped_p
4264 || current_row
->mouse_face_p
4265 || current_row
->x
!= desired_row
->x
)
4267 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4269 if (desired_row
->used
[TEXT_AREA
])
4270 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4271 desired_row
->used
[TEXT_AREA
]);
4273 /* Clear to end of window. */
4274 rif
->clear_end_of_line (-1);
4277 /* This erases the cursor. We do this here because
4278 notice_overwritten_cursor cannot easily check this, which
4279 might indicate that the whole functionality of
4280 notice_overwritten_cursor would better be implemented here.
4281 On the other hand, we need notice_overwritten_cursor as long
4282 as mouse highlighting is done asynchronously outside of
4284 if (vpos
== w
->phys_cursor
.vpos
)
4285 w
->phys_cursor_on_p
= 0;
4290 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4291 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4292 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4293 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4295 /* If the desired row extends its face to the text area end,
4296 make sure we write at least one glyph, so that the face
4297 extension actually takes place. */
4298 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4301 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4305 /* Loop over glyphs that current and desired row may have
4311 /* Skip over glyphs that both rows have in common. These
4312 don't have to be written. We can't skip if the last
4313 current glyph overlaps the glyph to its right. For
4314 example, consider a current row of `if ' with the `f' in
4315 Courier bold so that it overlaps the ` ' to its right.
4316 If the desired row is ` ', we would skip over the space
4317 after the `if' and there would remain a pixel from the
4318 `f' on the screen. */
4319 if (overlapping_glyphs_p
&& i
> 0)
4321 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4324 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4326 can_skip_p
= right
== 0;
4332 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4334 x
+= desired_glyph
->pixel_width
;
4335 ++desired_glyph
, ++current_glyph
, ++i
;
4338 /* Consider the case that the current row contains "xxx
4339 ppp ggg" in italic Courier font, and the desired row
4340 is "xxx ggg". The character `p' has lbearing, `g'
4341 has not. The loop above will stop in front of the
4342 first `p' in the current row. If we would start
4343 writing glyphs there, we wouldn't erase the lbearing
4344 of the `p'. The rest of the lbearing problem is then
4345 taken care of by draw_glyphs. */
4346 if (overlapping_glyphs_p
4348 && i
< current_row
->used
[TEXT_AREA
]
4349 && (current_row
->used
[TEXT_AREA
]
4350 != desired_row
->used
[TEXT_AREA
]))
4354 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4356 while (left
> 0 && i
> 0)
4358 --i
, --desired_glyph
, --current_glyph
;
4359 x
-= desired_glyph
->pixel_width
;
4360 left
-= desired_glyph
->pixel_width
;
4365 /* Try to avoid writing the entire rest of the desired row
4366 by looking for a resync point. This mainly prevents
4367 mode line flickering in the case the mode line is in
4368 fixed-pitch font, which it usually will be. */
4369 if (i
< desired_row
->used
[TEXT_AREA
])
4371 int start_x
= x
, start_hpos
= i
;
4372 struct glyph
*start
= desired_glyph
;
4374 int skip_first_p
= !can_skip_p
;
4376 /* Find the next glyph that's equal again. */
4379 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4382 x
+= desired_glyph
->pixel_width
;
4383 current_x
+= current_glyph
->pixel_width
;
4384 ++desired_glyph
, ++current_glyph
, ++i
;
4388 if (i
== start_hpos
|| x
!= current_x
)
4392 desired_glyph
= start
;
4396 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4397 rif
->write_glyphs (start
, i
- start_hpos
);
4402 /* Write the rest. */
4403 if (i
< desired_row
->used
[TEXT_AREA
])
4405 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4406 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4410 /* Maybe clear to end of line. */
4411 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4413 /* If new row extends to the end of the text area, nothing
4414 has to be cleared, if and only if we did a write_glyphs
4415 above. This is made sure by setting desired_stop_pos
4416 appropriately above. */
4417 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4419 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4421 /* If old row extends to the end of the text area, clear. */
4422 if (i
>= desired_row
->used
[TEXT_AREA
])
4423 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4424 desired_row
->pixel_width
);
4425 rif
->clear_end_of_line (-1);
4428 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4430 /* Otherwise clear to the end of the old row. Everything
4431 after that position should be clear already. */
4434 if (i
>= desired_row
->used
[TEXT_AREA
])
4435 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4436 desired_row
->pixel_width
);
4438 /* If cursor is displayed at the end of the line, make sure
4439 it's cleared. Nowadays we don't have a phys_cursor_glyph
4440 with which to erase the cursor (because this method
4441 doesn't work with lbearing/rbearing), so we must do it
4443 if (vpos
== w
->phys_cursor
.vpos
4444 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4446 w
->phys_cursor_on_p
= 0;
4450 x
= current_row
->pixel_width
;
4451 rif
->clear_end_of_line (x
);
4460 /* Update row VPOS in window W. Value is non-zero if display has been
4464 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4466 int vpos
, *mouse_face_overwritten_p
;
4468 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4469 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4470 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4473 /* Set the row being updated. This is important to let xterm.c
4474 know what line height values are in effect. */
4475 updated_row
= desired_row
;
4477 /* A row can be completely invisible in case a desired matrix was
4478 built with a vscroll and then make_cursor_line_fully_visible shifts
4479 the matrix. Make sure to make such rows current anyway, since
4480 we need the correct y-position, for example, in the current matrix. */
4481 if (desired_row
->mode_line_p
4482 || desired_row
->visible_height
> 0)
4484 xassert (desired_row
->enabled_p
);
4486 /* Update display of the left margin area, if there is one. */
4487 if (!desired_row
->full_width_p
4488 && !NILP (w
->left_margin_cols
))
4491 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4494 /* Update the display of the text area. */
4495 if (update_text_area (w
, vpos
))
4498 if (current_row
->mouse_face_p
)
4499 *mouse_face_overwritten_p
= 1;
4502 /* Update display of the right margin area, if there is one. */
4503 if (!desired_row
->full_width_p
4504 && !NILP (w
->right_margin_cols
))
4507 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4510 /* Draw truncation marks etc. */
4511 if (!current_row
->enabled_p
4512 || desired_row
->y
!= current_row
->y
4513 || desired_row
->visible_height
!= current_row
->visible_height
4514 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4515 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4516 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4517 || desired_row
->continued_p
!= current_row
->continued_p
4518 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4519 || (desired_row
->indicate_empty_line_p
4520 != current_row
->indicate_empty_line_p
)
4521 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4522 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4523 rif
->after_update_window_line_hook (desired_row
);
4526 /* Update current_row from desired_row. */
4527 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4533 /* Set the cursor after an update of window W. This function may only
4534 be called from update_window. */
4537 set_window_cursor_after_update (w
)
4540 struct frame
*f
= XFRAME (w
->frame
);
4541 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4542 int cx
, cy
, vpos
, hpos
;
4544 /* Not intended for frame matrix updates. */
4545 xassert (FRAME_WINDOW_P (f
));
4547 if (cursor_in_echo_area
4548 && !NILP (echo_area_buffer
[0])
4549 /* If we are showing a message instead of the mini-buffer,
4550 show the cursor for the message instead. */
4551 && XWINDOW (minibuf_window
) == w
4552 && EQ (minibuf_window
, echo_area_window
)
4553 /* These cases apply only to the frame that contains
4554 the active mini-buffer window. */
4555 && FRAME_HAS_MINIBUF_P (f
)
4556 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4558 cx
= cy
= vpos
= hpos
= 0;
4560 if (cursor_in_echo_area
>= 0)
4562 /* If the mini-buffer is several lines high, find the last
4563 line that has any text on it. Note: either all lines
4564 are enabled or none. Otherwise we wouldn't be able to
4566 struct glyph_row
*row
, *last_row
;
4567 struct glyph
*glyph
;
4568 int yb
= window_text_bottom_y (w
);
4571 row
= w
->current_matrix
->rows
;
4572 while (row
->enabled_p
4573 && (last_row
== NULL
4574 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4576 if (row
->used
[TEXT_AREA
]
4577 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4584 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4585 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4587 while (last
> start
&& last
->charpos
< 0)
4590 for (glyph
= start
; glyph
< last
; ++glyph
)
4592 cx
+= glyph
->pixel_width
;
4597 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4605 hpos
= w
->cursor
.hpos
;
4606 vpos
= w
->cursor
.vpos
;
4609 /* Window cursor can be out of sync for horizontally split windows. */
4610 hpos
= max (0, hpos
);
4611 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4612 vpos
= max (0, vpos
);
4613 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4614 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4618 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4619 tree rooted at W. */
4622 set_window_update_flags (w
, on_p
)
4628 if (!NILP (w
->hchild
))
4629 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4630 else if (!NILP (w
->vchild
))
4631 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4633 w
->must_be_updated_p
= on_p
;
4635 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4641 /***********************************************************************
4642 Window-Based Scrolling
4643 ***********************************************************************/
4645 /* Structure describing rows in scrolling_window. */
4649 /* Number of occurrences of this row in desired and current matrix. */
4650 int old_uses
, new_uses
;
4652 /* Vpos of row in new matrix. */
4653 int new_line_number
;
4655 /* Bucket index of this row_entry in the hash table row_table. */
4658 /* The row described by this entry. */
4659 struct glyph_row
*row
;
4661 /* Hash collision chain. */
4662 struct row_entry
*next
;
4665 /* A pool to allocate row_entry structures from, and the size of the
4666 pool. The pool is reallocated in scrolling_window when we find
4667 that we need a larger one. */
4669 static struct row_entry
*row_entry_pool
;
4670 static int row_entry_pool_size
;
4672 /* Index of next free entry in row_entry_pool. */
4674 static int row_entry_idx
;
4676 /* The hash table used during scrolling, and the table's size. This
4677 table is used to quickly identify equal rows in the desired and
4680 static struct row_entry
**row_table
;
4681 static int row_table_size
;
4683 /* Vectors of pointers to row_entry structures belonging to the
4684 current and desired matrix, and the size of the vectors. */
4686 static struct row_entry
**old_lines
, **new_lines
;
4687 static int old_lines_size
, new_lines_size
;
4689 /* A pool to allocate run structures from, and its size. */
4691 static struct run
*run_pool
;
4692 static int runs_size
;
4694 /* A vector of runs of lines found during scrolling. */
4696 static struct run
**runs
;
4698 /* Add glyph row ROW to the scrolling hash table during the scrolling
4701 static INLINE
struct row_entry
*
4702 add_row_entry (w
, row
)
4704 struct glyph_row
*row
;
4706 struct row_entry
*entry
;
4707 int i
= row
->hash
% row_table_size
;
4709 entry
= row_table
[i
];
4710 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4711 entry
= entry
->next
;
4715 entry
= row_entry_pool
+ row_entry_idx
++;
4717 entry
->old_uses
= entry
->new_uses
= 0;
4718 entry
->new_line_number
= 0;
4720 entry
->next
= row_table
[i
];
4721 row_table
[i
] = entry
;
4728 /* Try to reuse part of the current display of W by scrolling lines.
4729 HEADER_LINE_P non-zero means W has a header line.
4731 The algorithm is taken from Communications of the ACM, Apr78 "A
4732 Technique for Isolating Differences Between Files." It should take
4735 A short outline of the steps of the algorithm
4737 1. Skip lines equal at the start and end of both matrices.
4739 2. Enter rows in the current and desired matrix into a symbol
4740 table, counting how often they appear in both matrices.
4742 3. Rows that appear exactly once in both matrices serve as anchors,
4743 i.e. we assume that such lines are likely to have been moved.
4745 4. Starting from anchor lines, extend regions to be scrolled both
4746 forward and backward.
4750 -1 if all rows were found to be equal.
4751 0 to indicate that we did not scroll the display, or
4752 1 if we did scroll. */
4755 scrolling_window (w
, header_line_p
)
4759 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4760 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4761 int yb
= window_text_bottom_y (w
);
4762 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4763 int nruns
, nbytes
, n
, run_idx
;
4764 struct row_entry
*entry
;
4765 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4767 /* Skip over rows equal at the start. */
4768 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4770 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4771 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4776 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4777 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4778 && row_equal_p (w
, c
, d
, 1))
4787 /* Give up if some rows in the desired matrix are not enabled. */
4788 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4791 first_old
= first_new
= i
;
4793 /* Set last_new to the index + 1 of the last enabled row in the
4796 while (i
< desired_matrix
->nrows
- 1
4797 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4798 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4801 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4806 /* Set last_old to the index + 1 of the last enabled row in the
4807 current matrix. We don't look at the enabled flag here because
4808 we plan to reuse part of the display even if other parts are
4811 while (i
< current_matrix
->nrows
- 1)
4813 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4822 /* Skip over rows equal at the bottom. */
4825 while (i
- 1 > first_new
4826 && j
- 1 > first_old
4827 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4828 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4829 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4831 MATRIX_ROW (desired_matrix
, i
- 1),
4832 MATRIX_ROW (current_matrix
, j
- 1), 1))
4837 /* Nothing to do if all rows are equal. */
4838 if (last_new
== first_new
)
4841 /* Reallocate vectors, tables etc. if necessary. */
4843 if (current_matrix
->nrows
> old_lines_size
)
4845 old_lines_size
= current_matrix
->nrows
;
4846 nbytes
= old_lines_size
* sizeof *old_lines
;
4847 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4850 if (desired_matrix
->nrows
> new_lines_size
)
4852 new_lines_size
= desired_matrix
->nrows
;
4853 nbytes
= new_lines_size
* sizeof *new_lines
;
4854 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4857 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4858 if (3 * n
> row_table_size
)
4860 row_table_size
= next_almost_prime (3 * n
);
4861 nbytes
= row_table_size
* sizeof *row_table
;
4862 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4863 bzero (row_table
, nbytes
);
4866 if (n
> row_entry_pool_size
)
4868 row_entry_pool_size
= n
;
4869 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4870 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4873 if (desired_matrix
->nrows
> runs_size
)
4875 runs_size
= desired_matrix
->nrows
;
4876 nbytes
= runs_size
* sizeof *runs
;
4877 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4878 nbytes
= runs_size
* sizeof *run_pool
;
4879 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4882 nruns
= run_idx
= 0;
4885 /* Add rows from the current and desired matrix to the hash table
4886 row_hash_table to be able to find equal ones quickly. */
4888 for (i
= first_old
; i
< last_old
; ++i
)
4890 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4892 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4893 old_lines
[i
] = entry
;
4897 old_lines
[i
] = NULL
;
4900 for (i
= first_new
; i
< last_new
; ++i
)
4902 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4903 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4905 entry
->new_line_number
= i
;
4906 new_lines
[i
] = entry
;
4909 /* Identify moves based on lines that are unique and equal
4910 in both matrices. */
4911 for (i
= first_old
; i
< last_old
;)
4913 && old_lines
[i
]->old_uses
== 1
4914 && old_lines
[i
]->new_uses
== 1)
4917 int new_line
= old_lines
[i
]->new_line_number
;
4918 struct run
*run
= run_pool
+ run_idx
++;
4921 run
->current_vpos
= i
;
4922 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4923 run
->desired_vpos
= new_line
;
4924 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4926 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4928 /* Extend backward. */
4931 while (j
> first_old
4933 && old_lines
[j
] == new_lines
[k
])
4935 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4936 --run
->current_vpos
;
4937 --run
->desired_vpos
;
4940 run
->desired_y
-= h
;
4941 run
->current_y
-= h
;
4945 /* Extend forward. */
4950 && old_lines
[j
] == new_lines
[k
])
4952 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4958 /* Insert run into list of all runs. Order runs by copied
4959 pixel lines. Note that we record runs that don't have to
4960 be copied because they are already in place. This is done
4961 because we can avoid calling update_window_line in this
4963 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4965 for (k
= nruns
; k
> j
; --k
)
4966 runs
[k
] = runs
[k
- 1];
4975 /* Do the moves. Do it in a way that we don't overwrite something
4976 we want to copy later on. This is not solvable in general
4977 because there is only one display and we don't have a way to
4978 exchange areas on this display. Example:
4980 +-----------+ +-----------+
4982 +-----------+ --> +-----------+
4984 +-----------+ +-----------+
4986 Instead, prefer bigger moves, and invalidate moves that would
4987 copy from where we copied to. */
4989 for (i
= 0; i
< nruns
; ++i
)
4990 if (runs
[i
]->nrows
> 0)
4992 struct run
*r
= runs
[i
];
4994 /* Copy on the display. */
4995 if (r
->current_y
!= r
->desired_y
)
4997 rif
->scroll_run_hook (w
, r
);
4999 /* Invalidate runs that copy from where we copied to. */
5000 for (j
= i
+ 1; j
< nruns
; ++j
)
5002 struct run
*p
= runs
[j
];
5004 if ((p
->current_y
>= r
->desired_y
5005 && p
->current_y
< r
->desired_y
+ r
->height
)
5006 || (p
->current_y
+ p
->height
>= r
->desired_y
5007 && (p
->current_y
+ p
->height
5008 < r
->desired_y
+ r
->height
)))
5013 /* Assign matrix rows. */
5014 for (j
= 0; j
< r
->nrows
; ++j
)
5016 struct glyph_row
*from
, *to
;
5017 int to_overlapped_p
;
5019 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5020 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5021 to_overlapped_p
= to
->overlapped_p
;
5022 assign_row (to
, from
);
5023 to
->enabled_p
= 1, from
->enabled_p
= 0;
5024 to
->overlapped_p
= to_overlapped_p
;
5028 /* Clear the hash table, for the next time. */
5029 for (i
= 0; i
< row_entry_idx
; ++i
)
5030 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5032 /* Value is non-zero to indicate that we scrolled the display. */
5038 /************************************************************************
5040 ************************************************************************/
5042 /* Update the desired frame matrix of frame F.
5044 FORCE_P non-zero means that the update should not be stopped by
5045 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5046 should not be tried.
5048 Value is non-zero if update was stopped due to pending input. */
5051 update_frame_1 (f
, force_p
, inhibit_id_p
)
5056 /* Frame matrices to work on. */
5057 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5058 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5061 int preempt_count
= baud_rate
/ 2400 + 1;
5062 extern int input_pending
;
5064 xassert (current_matrix
&& desired_matrix
);
5066 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5067 calculate_costs (f
);
5069 if (preempt_count
<= 0)
5072 if (redisplay_dont_pause
)
5074 else if (!force_p
&& detect_input_pending ())
5080 /* If we cannot insert/delete lines, it's no use trying it. */
5081 if (!FRAME_LINE_INS_DEL_OK (f
))
5084 /* See if any of the desired lines are enabled; don't compute for
5085 i/d line if just want cursor motion. */
5086 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5087 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5090 /* Try doing i/d line, if not yet inhibited. */
5091 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5092 force_p
|= scrolling (f
);
5094 /* Update the individual lines as needed. Do bottom line first. */
5095 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5096 update_frame_line (f
, desired_matrix
->nrows
- 1);
5098 /* Now update the rest of the lines. */
5099 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5101 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5103 if (FRAME_TERMCAP_P (f
))
5105 /* Flush out every so many lines.
5106 Also flush out if likely to have more than 1k buffered
5107 otherwise. I'm told that some telnet connections get
5108 really screwed by more than 1k output at once. */
5109 int outq
= PENDING_OUTPUT_COUNT (TTY_OUTPUT (FRAME_TTY (f
)));
5111 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5113 fflush (TTY_OUTPUT (FRAME_TTY (f
)));
5114 if (preempt_count
== 1)
5116 #ifdef EMACS_OUTQSIZE
5117 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5118 /* Probably not a tty. Ignore the error and reset
5120 outq
= PENDING_OUTPUT_COUNT (TTY_OUTPUT (FRAME_TTY (f
)));
5123 if (baud_rate
<= outq
&& baud_rate
> 0)
5124 sleep (outq
/ baud_rate
);
5129 if ((i
- 1) % preempt_count
== 0)
5130 detect_input_pending ();
5132 update_frame_line (f
, i
);
5136 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5138 /* Now just clean up termcap drivers and set cursor, etc. */
5141 if ((cursor_in_echo_area
5142 /* If we are showing a message instead of the mini-buffer,
5143 show the cursor for the message instead of for the
5144 (now hidden) mini-buffer contents. */
5145 || (EQ (minibuf_window
, selected_window
)
5146 && EQ (minibuf_window
, echo_area_window
)
5147 && !NILP (echo_area_buffer
[0])))
5148 /* These cases apply only to the frame that contains
5149 the active mini-buffer window. */
5150 && FRAME_HAS_MINIBUF_P (f
)
5151 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5153 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5156 if (cursor_in_echo_area
< 0)
5158 /* Negative value of cursor_in_echo_area means put
5159 cursor at beginning of line. */
5165 /* Positive value of cursor_in_echo_area means put
5166 cursor at the end of the prompt. If the mini-buffer
5167 is several lines high, find the last line that has
5169 row
= FRAME_LINES (f
);
5175 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5177 /* Frame rows are filled up with spaces that
5178 must be ignored here. */
5179 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5181 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5182 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5185 && (last
- 1)->charpos
< 0)
5191 while (row
> top
&& col
== 0);
5193 /* Make sure COL is not out of range. */
5194 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5196 /* If we have another row, advance cursor into it. */
5197 if (row
< FRAME_LINES (f
) - 1)
5199 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5202 /* Otherwise move it back in range. */
5204 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5208 cursor_to (row
, col
);
5212 /* We have only one cursor on terminal frames. Use it to
5213 display the cursor of the selected window. */
5214 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5215 if (w
->cursor
.vpos
>= 0
5216 /* The cursor vpos may be temporarily out of bounds
5217 in the following situation: There is one window,
5218 with the cursor in the lower half of it. The window
5219 is split, and a message causes a redisplay before
5220 a new cursor position has been computed. */
5221 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5223 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5224 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5226 if (INTEGERP (w
->left_margin_cols
))
5227 x
+= XFASTINT (w
->left_margin_cols
);
5229 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5237 clear_desired_matrices (f
);
5242 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5246 struct frame
*frame
;
5248 int unchanged_at_top
, unchanged_at_bottom
;
5251 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5252 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5253 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5254 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5256 int free_at_end_vpos
= FRAME_LINES (frame
);
5257 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5258 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5260 if (!current_matrix
)
5263 /* Compute hash codes of all the lines. Also calculate number of
5264 changed lines, number of unchanged lines at the beginning, and
5265 number of unchanged lines at the end. */
5267 unchanged_at_top
= 0;
5268 unchanged_at_bottom
= FRAME_LINES (frame
);
5269 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5271 /* Give up on this scrolling if some old lines are not enabled. */
5272 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5274 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5275 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5277 /* This line cannot be redrawn, so don't let scrolling mess it. */
5278 new_hash
[i
] = old_hash
[i
];
5279 #define INFINITY 1000000 /* Taken from scroll.c */
5280 draw_cost
[i
] = INFINITY
;
5284 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5285 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5288 if (old_hash
[i
] != new_hash
[i
])
5291 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5293 else if (i
== unchanged_at_top
)
5295 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5298 /* If changed lines are few, don't allow preemption, don't scroll. */
5299 if ((!FRAME_SCROLL_REGION_OK (frame
)
5300 && changed_lines
< baud_rate
/ 2400)
5301 || unchanged_at_bottom
== FRAME_LINES (frame
))
5304 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5305 - unchanged_at_bottom
);
5307 if (FRAME_SCROLL_REGION_OK (frame
))
5308 free_at_end_vpos
-= unchanged_at_bottom
;
5309 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5310 free_at_end_vpos
= -1;
5312 /* If large window, fast terminal and few lines in common between
5313 current frame and desired frame, don't bother with i/d calc. */
5314 if (!FRAME_SCROLL_REGION_OK (frame
)
5315 && window_size
>= 18 && baud_rate
> 2400
5317 10 * scrolling_max_lines_saved (unchanged_at_top
,
5318 FRAME_LINES (frame
) - unchanged_at_bottom
,
5319 old_hash
, new_hash
, draw_cost
)))
5322 if (window_size
< 2)
5325 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5326 draw_cost
+ unchanged_at_top
- 1,
5327 old_draw_cost
+ unchanged_at_top
- 1,
5328 old_hash
+ unchanged_at_top
- 1,
5329 new_hash
+ unchanged_at_top
- 1,
5330 free_at_end_vpos
- unchanged_at_top
);
5336 /* Count the number of blanks at the start of the vector of glyphs R
5337 which is LEN glyphs long. */
5340 count_blanks (r
, len
)
5346 for (i
= 0; i
< len
; ++i
)
5347 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5354 /* Count the number of glyphs in common at the start of the glyph
5355 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5356 of STR2. Value is the number of equal glyphs equal at the start. */
5359 count_match (str1
, end1
, str2
, end2
)
5360 struct glyph
*str1
, *end1
, *str2
, *end2
;
5362 struct glyph
*p1
= str1
;
5363 struct glyph
*p2
= str2
;
5367 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5374 /* Char insertion/deletion cost vector, from term.c */
5376 extern int *char_ins_del_vector
;
5377 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5380 /* Perform a frame-based update on line VPOS in frame FRAME. */
5383 update_frame_line (f
, vpos
)
5387 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5389 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5390 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5391 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5392 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5393 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5394 int must_write_whole_line_p
;
5395 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5396 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5397 != FACE_TTY_DEFAULT_BG_COLOR
);
5399 if (colored_spaces_p
)
5402 /* Current row not enabled means it has unknown contents. We must
5403 write the whole desired line in that case. */
5404 must_write_whole_line_p
= !current_row
->enabled_p
;
5405 if (must_write_whole_line_p
)
5412 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5413 olen
= current_row
->used
[TEXT_AREA
];
5415 /* Ignore trailing spaces, if we can. */
5416 if (!write_spaces_p
)
5417 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5421 current_row
->enabled_p
= 1;
5422 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5424 /* If desired line is empty, just clear the line. */
5425 if (!desired_row
->enabled_p
)
5431 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5432 nlen
= desired_row
->used
[TEXT_AREA
];
5433 nend
= nbody
+ nlen
;
5435 /* If display line has unknown contents, write the whole line. */
5436 if (must_write_whole_line_p
)
5438 /* Ignore spaces at the end, if we can. */
5439 if (!write_spaces_p
)
5440 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5443 /* Write the contents of the desired line. */
5446 cursor_to (vpos
, 0);
5447 write_glyphs (nbody
, nlen
);
5450 /* Don't call clear_end_of_line if we already wrote the whole
5451 line. The cursor will not be at the right margin in that
5452 case but in the line below. */
5453 if (nlen
< FRAME_TOTAL_COLS (f
))
5455 cursor_to (vpos
, nlen
);
5456 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5459 /* Make sure we are in the right row, otherwise cursor movement
5460 with cmgoto might use `ch' in the wrong row. */
5461 cursor_to (vpos
, 0);
5463 make_current (desired_matrix
, current_matrix
, vpos
);
5467 /* Pretend trailing spaces are not there at all,
5468 unless for one reason or another we must write all spaces. */
5469 if (!write_spaces_p
)
5470 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5473 /* If there's no i/d char, quickly do the best we can without it. */
5474 if (!FRAME_CHAR_INS_DEL_OK (f
))
5478 /* Find the first glyph in desired row that doesn't agree with
5479 a glyph in the current row, and write the rest from there on. */
5480 for (i
= 0; i
< nlen
; i
++)
5482 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5484 /* Find the end of the run of different glyphs. */
5488 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5489 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5492 /* Output this run of non-matching chars. */
5493 cursor_to (vpos
, i
);
5494 write_glyphs (nbody
+ i
, j
- i
);
5497 /* Now find the next non-match. */
5501 /* Clear the rest of the line, or the non-clear part of it. */
5504 cursor_to (vpos
, nlen
);
5505 clear_end_of_line (olen
);
5508 /* Make current row = desired row. */
5509 make_current (desired_matrix
, current_matrix
, vpos
);
5513 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5514 characters in a row. */
5518 /* If current line is blank, skip over initial spaces, if
5519 possible, and write the rest. */
5523 nsp
= count_blanks (nbody
, nlen
);
5527 cursor_to (vpos
, nsp
);
5528 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5531 /* Exchange contents between current_frame and new_frame. */
5532 make_current (desired_matrix
, current_matrix
, vpos
);
5536 /* Compute number of leading blanks in old and new contents. */
5537 osp
= count_blanks (obody
, olen
);
5538 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5540 /* Compute number of matching chars starting with first non-blank. */
5541 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5542 nbody
+ nsp
, nbody
+ nlen
);
5544 /* Spaces in new match implicit space past the end of old. */
5545 /* A bug causing this to be a no-op was fixed in 18.29. */
5546 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5549 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5553 /* Avoid doing insert/delete char
5554 just cause number of leading spaces differs
5555 when the following text does not match. */
5556 if (begmatch
== 0 && osp
!= nsp
)
5557 osp
= nsp
= min (osp
, nsp
);
5559 /* Find matching characters at end of line */
5562 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5564 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5569 endmatch
= obody
+ olen
- op1
;
5571 /* tem gets the distance to insert or delete.
5572 endmatch is how many characters we save by doing so.
5575 tem
= (nlen
- nsp
) - (olen
- osp
);
5577 && (!FRAME_CHAR_INS_DEL_OK (f
)
5578 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5581 /* nsp - osp is the distance to insert or delete.
5582 If that is nonzero, begmatch is known to be nonzero also.
5583 begmatch + endmatch is how much we save by doing the ins/del.
5587 && (!FRAME_CHAR_INS_DEL_OK (f
)
5588 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5592 osp
= nsp
= min (osp
, nsp
);
5595 /* Now go through the line, inserting, writing and
5596 deleting as appropriate. */
5600 cursor_to (vpos
, nsp
);
5601 delete_glyphs (osp
- nsp
);
5605 /* If going to delete chars later in line
5606 and insert earlier in the line,
5607 must delete first to avoid losing data in the insert */
5608 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5610 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5611 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5612 olen
= nlen
- (nsp
- osp
);
5614 cursor_to (vpos
, osp
);
5615 insert_glyphs (0, nsp
- osp
);
5619 tem
= nsp
+ begmatch
+ endmatch
;
5620 if (nlen
!= tem
|| olen
!= tem
)
5622 if (!endmatch
|| nlen
== olen
)
5624 /* If new text being written reaches right margin, there is
5625 no need to do clear-to-eol at the end of this function
5626 (and it would not be safe, since cursor is not going to
5627 be "at the margin" after the text is done). */
5628 if (nlen
== FRAME_TOTAL_COLS (f
))
5631 /* Function write_glyphs is prepared to do nothing
5632 if passed a length <= 0. Check it here to avoid
5633 unnecessary cursor movement. */
5636 cursor_to (vpos
, nsp
+ begmatch
);
5637 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5640 else if (nlen
> olen
)
5642 /* Here, we used to have the following simple code:
5643 ----------------------------------------
5644 write_glyphs (nbody + nsp + begmatch, olen - tem);
5645 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5646 ----------------------------------------
5647 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5648 is a padding glyph. */
5649 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5652 cursor_to (vpos
, nsp
+ begmatch
);
5654 /* Calculate columns we can actually overwrite. */
5655 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5657 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5659 /* If we left columns to be overwritten, we must delete them. */
5660 del
= olen
- tem
- out
;
5662 delete_glyphs (del
);
5664 /* At last, we insert columns not yet written out. */
5665 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5668 else if (olen
> nlen
)
5670 cursor_to (vpos
, nsp
+ begmatch
);
5671 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5672 delete_glyphs (olen
- nlen
);
5678 /* If any unerased characters remain after the new line, erase them. */
5681 cursor_to (vpos
, nlen
);
5682 clear_end_of_line (olen
);
5685 /* Exchange contents between current_frame and new_frame. */
5686 make_current (desired_matrix
, current_matrix
, vpos
);
5691 /***********************************************************************
5692 X/Y Position -> Buffer Position
5693 ***********************************************************************/
5695 /* Determine what's under window-relative pixel position (*X, *Y).
5696 Return in *OBJECT the object (string or buffer) that's there.
5697 Return in *POS the position in that object. Adjust *X and *Y
5698 to character positions. */
5701 buffer_posn_from_coords (w
, x
, y
, dx
, dy
, object
, pos
)
5705 Lisp_Object
*object
;
5706 struct display_pos
*pos
;
5709 struct buffer
*old_current_buffer
= current_buffer
;
5710 struct text_pos startp
;
5713 current_buffer
= XBUFFER (w
->buffer
);
5714 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5715 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5716 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5717 start_display (&it
, w
, startp
);
5719 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5720 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5721 MOVE_TO_X
| MOVE_TO_Y
);
5723 current_buffer
= old_current_buffer
;
5725 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5726 *dy
= *y
- it
.current_y
;
5728 *object
= w
->buffer
;
5730 #ifdef HAVE_WINDOW_SYSTEM
5731 if (it
.what
== IT_IMAGE
)
5734 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5735 && !NILP (img
->spec
))
5737 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
);
5738 struct glyph
*glyph
;
5740 if (it
.hpos
< row
->used
[TEXT_AREA
]
5741 && (glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
,
5742 glyph
->type
== IMAGE_GLYPH
))
5744 *dy
-= row
->ascent
- glyph
->ascent
;
5745 *object
= img
->spec
;
5751 if (STRINGP (it
.string
))
5752 *object
= it
.string
;
5756 /* Add extra (default width) columns if clicked after EOL. */
5757 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5759 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5766 /* Value is the string under window-relative coordinates X/Y in the
5767 mode or header line of window W, or nil if none. MODE_LINE_P non-zero
5768 means look at the mode line. *CHARPOS is set to the position in
5769 the string returned. */
5772 mode_line_string (w
, x
, y
, dx
, dy
, part
, charpos
)
5776 enum window_part part
;
5779 struct glyph_row
*row
;
5780 struct glyph
*glyph
, *end
;
5782 Lisp_Object string
= Qnil
;
5784 if (part
== ON_MODE_LINE
)
5785 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5787 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5789 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5791 if (row
->mode_line_p
&& row
->enabled_p
)
5793 /* Find the glyph under X. If we find one with a string object,
5794 it's the one we were looking for. */
5795 glyph
= row
->glyphs
[TEXT_AREA
];
5796 end
= glyph
+ row
->used
[TEXT_AREA
];
5797 for (x0
= *x
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5798 x0
-= glyph
->pixel_width
;
5799 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5802 string
= glyph
->object
;
5803 *charpos
= glyph
->charpos
;
5806 /* Add extra (default width) columns if clicked after EOL. */
5807 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5825 /* Value is the string under window-relative coordinates X/Y in either
5826 marginal area, or nil if none. *CHARPOS is set to the position in
5827 the string returned. */
5830 marginal_area_string (w
, x
, y
, dx
, dy
, part
, charpos
)
5834 enum window_part part
;
5837 struct glyph_row
*row
= w
->current_matrix
->rows
;
5838 struct glyph
*glyph
, *end
;
5839 int x0
, y0
, i
, wy
= *y
;
5841 Lisp_Object string
= Qnil
;
5843 if (part
== ON_LEFT_MARGIN
)
5844 area
= LEFT_MARGIN_AREA
;
5845 else if (part
== ON_RIGHT_MARGIN
)
5846 area
= RIGHT_MARGIN_AREA
;
5850 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5851 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5854 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5858 /* Find the glyph under X. If we find one with a string object,
5859 it's the one we were looking for. */
5860 if (area
== RIGHT_MARGIN_AREA
)
5861 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5862 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5863 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5864 + window_box_width (w
, LEFT_MARGIN_AREA
)
5865 + window_box_width (w
, TEXT_AREA
));
5867 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5868 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5871 glyph
= row
->glyphs
[area
];
5872 end
= glyph
+ row
->used
[area
];
5873 for (x0
= *x
- x0
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5874 x0
-= glyph
->pixel_width
;
5875 *x
= glyph
- row
->glyphs
[area
];
5878 string
= glyph
->object
;
5879 *charpos
= glyph
->charpos
;
5880 #ifdef HAVE_WINDOW_SYSTEM
5881 if (glyph
->type
== IMAGE_GLYPH
)
5884 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5887 y0
-= row
->ascent
- glyph
->ascent
;
5892 /* Add extra (default width) columns if clicked after EOL. */
5893 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5911 /***********************************************************************
5912 Changing Frame Sizes
5913 ***********************************************************************/
5918 window_change_signal (signalnum
) /* If we don't have an argument, */
5919 int signalnum
; /* some compilers complain in signal calls. */
5925 int old_errno
= errno
;
5927 struct tty_display_info
*tty
;
5929 /* The frame size change obviously applies to a single
5930 termcap-controlled terminal, but we can't decide which.
5931 Therefore, we resize the frames corresponding to each tty.
5933 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
5935 if (! tty
->term_initted
)
5938 get_tty_size (fileno (TTY_INPUT (tty
)), &width
, &height
);
5941 Lisp_Object tail
, frame
;
5943 FOR_EACH_FRAME (tail
, frame
)
5945 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
5947 /* Record the new sizes, but don't reallocate the data structures
5948 now. Let that be done later outside of the signal handler. */
5949 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5956 signal (SIGWINCH
, window_change_signal
);
5959 #endif /* SIGWINCH */
5962 /* Do any change in frame size that was requested by a signal. SAFE
5963 non-zero means this function is called from a place where it is
5964 safe to change frame sizes while a redisplay is in progress. */
5967 do_pending_window_change (safe
)
5970 /* If window_change_signal should have run before, run it now. */
5971 if (redisplaying_p
&& !safe
)
5974 while (delayed_size_change
)
5976 Lisp_Object tail
, frame
;
5978 delayed_size_change
= 0;
5980 FOR_EACH_FRAME (tail
, frame
)
5982 struct frame
*f
= XFRAME (frame
);
5984 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
5985 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
5992 /* Change the frame height and/or width. Values may be given as zero to
5993 indicate no change is to take place.
5995 If DELAY is non-zero, then assume we're being called from a signal
5996 handler, and queue the change for later - perhaps the next
5997 redisplay. Since this tries to resize windows, we can't call it
5998 from a signal handler.
6000 SAFE non-zero means this function is called from a place where it's
6001 safe to change frame sizes while a redisplay is in progress. */
6004 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6005 register struct frame
*f
;
6006 int newheight
, newwidth
, pretend
, delay
, safe
;
6008 Lisp_Object tail
, frame
;
6010 if (FRAME_MSDOS_P (f
))
6012 /* On MS-DOS, all frames use the same screen, so a change in
6013 size affects all frames. Termcap now supports multiple
6015 FOR_EACH_FRAME (tail
, frame
)
6016 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6017 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6018 pretend
, delay
, safe
);
6021 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6025 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6026 register struct frame
*f
;
6027 int newheight
, newwidth
, pretend
, delay
, safe
;
6029 int new_frame_total_cols
;
6030 int count
= SPECPDL_INDEX ();
6032 /* If we can't deal with the change now, queue it for later. */
6033 if (delay
|| (redisplaying_p
&& !safe
))
6035 f
->new_text_lines
= newheight
;
6036 f
->new_text_cols
= newwidth
;
6037 delayed_size_change
= 1;
6041 /* This size-change overrides any pending one for this frame. */
6042 f
->new_text_lines
= 0;
6043 f
->new_text_cols
= 0;
6045 /* If an argument is zero, set it to the current value. */
6047 newheight
= FRAME_LINES (f
);
6049 newwidth
= FRAME_COLS (f
);
6051 /* Compute width of windows in F.
6052 This is the width of the frame without vertical scroll bars. */
6053 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6055 /* Round up to the smallest acceptable size. */
6056 check_frame_size (f
, &newheight
, &newwidth
);
6058 /* If we're not changing the frame size, quit now. */
6059 if (newheight
== FRAME_LINES (f
)
6060 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6066 /* We only can set screen dimensions to certain values supported
6067 by our video hardware. Try to find the smallest size greater
6068 or equal to the requested dimensions. */
6069 dos_set_window_size (&newheight
, &newwidth
);
6072 if (newheight
!= FRAME_LINES (f
))
6074 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6076 /* Frame has both root and mini-buffer. */
6077 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6078 FRAME_TOP_MARGIN (f
));
6079 set_window_height (FRAME_ROOT_WINDOW (f
),
6082 - FRAME_TOP_MARGIN (f
)),
6084 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6086 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6089 /* Frame has just one top-level window. */
6090 set_window_height (FRAME_ROOT_WINDOW (f
),
6091 newheight
- FRAME_TOP_MARGIN (f
), 0);
6093 if (FRAME_TERMCAP_P (f
) && !pretend
)
6094 FrameRows (FRAME_TTY (f
)) = newheight
;
6097 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6099 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6100 if (FRAME_HAS_MINIBUF_P (f
))
6101 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6103 if (FRAME_TERMCAP_P (f
) && !pretend
)
6104 FrameCols (FRAME_TTY (f
)) = newwidth
;
6106 if (WINDOWP (f
->tool_bar_window
))
6107 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6110 FRAME_LINES (f
) = newheight
;
6111 SET_FRAME_COLS (f
, newwidth
);
6114 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6115 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6117 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6119 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6120 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6121 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6122 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6126 calculate_costs (f
);
6127 SET_FRAME_GARBAGED (f
);
6132 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6134 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6135 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6136 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6138 unbind_to (count
, Qnil
);
6143 /***********************************************************************
6144 Terminal Related Lisp Functions
6145 ***********************************************************************/
6147 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6148 1, 1, "FOpen termscript file: ",
6149 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6150 FILE = nil means just close any termscript file currently open. */)
6154 if (TTY_TERMSCRIPT (CURTTY ()) != 0)
6155 fclose (TTY_TERMSCRIPT (CURTTY ()));
6156 TTY_TERMSCRIPT (CURTTY ()) = 0;
6160 file
= Fexpand_file_name (file
, Qnil
);
6161 TTY_TERMSCRIPT (CURTTY ()) = fopen (SDATA (file
), "w");
6162 if (TTY_TERMSCRIPT (CURTTY ()) == 0)
6163 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6169 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6170 Ssend_string_to_terminal
, 1, 1, 0,
6171 doc
: /* Send STRING to the terminal without alteration.
6172 Control characters in STRING will have terminal-dependent effects. */)
6176 /* ??? Perhaps we should do something special for multibyte strings here. */
6177 CHECK_STRING (string
);
6178 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6179 error ("Current frame is not on a tty device");
6181 if (TTY_TERMSCRIPT (CURTTY ()))
6183 fwrite (SDATA (string
), 1, SBYTES (string
),
6184 TTY_TERMSCRIPT (CURTTY ()));
6185 fflush (TTY_TERMSCRIPT (CURTTY ()));
6187 fwrite (SDATA (string
), 1, SBYTES (string
),
6188 TTY_OUTPUT (CURTTY ()));
6189 fflush (TTY_OUTPUT (CURTTY ()));
6194 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6195 doc
: /* Beep, or flash the screen.
6196 Also, unless an argument is given,
6197 terminate any keyboard macro currently executing. */)
6207 if (FRAME_TERMCAP_P (XFRAME (selected_frame
)))
6208 fflush (TTY_OUTPUT (CURTTY ()));
6221 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6222 error ("Keyboard macro terminated by a command ringing the bell");
6225 if (FRAME_TERMCAP_P (XFRAME (selected_frame
)))
6226 fflush (TTY_OUTPUT (CURTTY ()));
6231 /***********************************************************************
6233 ***********************************************************************/
6235 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6236 doc
: /* Pause, without updating display, for SECONDS seconds.
6237 SECONDS may be a floating-point value, meaning that you can wait for a
6238 fraction of a second. Optional second arg MILLISECONDS specifies an
6239 additional wait period, in milliseconds; this may be useful if your
6240 Emacs was built without floating point support.
6241 \(Not all operating systems support waiting for a fraction of a second.) */)
6242 (seconds
, milliseconds
)
6243 Lisp_Object seconds
, milliseconds
;
6247 if (NILP (milliseconds
))
6248 XSETINT (milliseconds
, 0);
6250 CHECK_NUMBER (milliseconds
);
6251 usec
= XINT (milliseconds
) * 1000;
6254 double duration
= extract_float (seconds
);
6255 sec
= (int) duration
;
6256 usec
+= (duration
- sec
) * 1000000;
6259 #ifndef EMACS_HAS_USECS
6260 if (sec
== 0 && usec
!= 0)
6261 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6264 /* Assure that 0 <= usec < 1000000. */
6267 /* We can't rely on the rounding being correct if usec is negative. */
6268 if (-1000000 < usec
)
6269 sec
--, usec
+= 1000000;
6271 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6274 sec
+= usec
/ 1000000, usec
%= 1000000;
6276 if (sec
< 0 || (sec
== 0 && usec
== 0))
6282 XSETFASTINT (zero
, 0);
6283 wait_reading_process_input (sec
, usec
, zero
, 0);
6286 /* We should always have wait_reading_process_input; we have a dummy
6287 implementation for systems which don't support subprocesses. */
6289 /* No wait_reading_process_input */
6296 /* The reason this is done this way
6297 (rather than defined (H_S) && defined (H_T))
6298 is because the VMS preprocessor doesn't grok `defined'. */
6300 EMACS_GET_TIME (end_time
);
6301 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6302 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6306 EMACS_GET_TIME (timeout
);
6307 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6308 if (EMACS_TIME_NEG_P (timeout
)
6309 || !select (1, 0, 0, 0, &timeout
))
6312 #else /* not HAVE_SELECT */
6314 #endif /* HAVE_SELECT */
6315 #endif /* not VMS */
6318 #endif /* no subprocesses */
6324 /* This is just like wait_reading_process_input, except that
6325 it does the redisplay.
6327 It's also much like Fsit_for, except that it can be used for
6328 waiting for input as well. */
6331 sit_for (sec
, usec
, reading
, display
, initial_display
)
6332 int sec
, usec
, reading
, display
, initial_display
;
6334 Lisp_Object read_kbd
;
6336 swallow_events (display
);
6338 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_macro
))
6341 if (initial_display
)
6342 redisplay_preserve_echo_area (2);
6344 if (sec
== 0 && usec
== 0)
6351 XSETINT (read_kbd
, reading
? -1 : 1);
6352 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6354 return detect_input_pending () ? Qnil
: Qt
;
6358 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6359 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6360 SECONDS may be a floating-point value, meaning that you can wait for a
6361 fraction of a second.
6362 \(Not all operating systems support waiting for a fraction of a second.)
6363 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6364 Redisplay is preempted as always if input arrives, and does not happen
6365 if input is available before it starts.
6366 Value is t if waited the full time with no input arriving.
6368 An obsolete but still supported form is
6369 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6370 Where the optional arg MILLISECONDS specifies an additional wait period,
6371 in milliseconds; this was useful when Emacs was built without
6372 floating point support.
6373 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6375 /* The `old-nodisp' stuff is there so that the arglist has the correct
6376 length. Otherwise, `defdvice' will redefine it with fewer args. */
6377 (seconds
, milliseconds
, nodisp
)
6378 Lisp_Object seconds
, milliseconds
, nodisp
;
6382 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6384 nodisp
= milliseconds
;
6385 milliseconds
= Qnil
;
6388 if (NILP (milliseconds
))
6389 XSETINT (milliseconds
, 0);
6391 CHECK_NUMBER (milliseconds
);
6392 usec
= XINT (milliseconds
) * 1000;
6395 double duration
= extract_float (seconds
);
6396 sec
= (int) duration
;
6397 usec
+= (duration
- sec
) * 1000000;
6400 #ifndef EMACS_HAS_USECS
6401 if (usec
!= 0 && sec
== 0)
6402 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6405 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6410 /***********************************************************************
6411 Other Lisp Functions
6412 ***********************************************************************/
6414 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6415 session's frames, frame names, buffers, buffer-read-only flags, and
6416 buffer-modified-flags, and a trailing sentinel (so we don't need to
6417 add length checks). */
6419 static Lisp_Object frame_and_buffer_state
;
6422 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6423 Sframe_or_buffer_changed_p
, 0, 0, 0,
6424 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6425 The state variable is an internal vector containing all frames and buffers,
6426 aside from buffers whose names start with space,
6427 along with the buffers' read-only and modified flags, which allows a fast
6428 check to see whether the menu bars might need to be recomputed.
6429 If this function returns non-nil, it updates the internal vector to reflect
6430 the current state. */)
6433 Lisp_Object tail
, frame
, buf
;
6437 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6438 FOR_EACH_FRAME (tail
, frame
)
6440 if (!EQ (*vecp
++, frame
))
6442 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6445 /* Check that the buffer info matches.
6446 No need to test for the end of the vector
6447 because the last element of the vector is lambda
6448 and that will always cause a mismatch. */
6449 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6451 buf
= XCDR (XCAR (tail
));
6452 /* Ignore buffers that aren't included in buffer lists. */
6453 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6455 if (!EQ (*vecp
++, buf
))
6457 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6459 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6462 /* Detect deletion of a buffer at the end of the list. */
6463 if (EQ (*vecp
, Qlambda
))
6466 /* Start with 1 so there is room for at least one lambda at the end. */
6468 FOR_EACH_FRAME (tail
, frame
)
6470 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6472 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6473 if (n
> XVECTOR (frame_and_buffer_state
)->size
6474 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6475 /* Add 20 extra so we grow it less often. */
6476 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6477 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6478 FOR_EACH_FRAME (tail
, frame
)
6481 *vecp
++ = XFRAME (frame
)->name
;
6483 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6485 buf
= XCDR (XCAR (tail
));
6486 /* Ignore buffers that aren't included in buffer lists. */
6487 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6490 *vecp
++ = XBUFFER (buf
)->read_only
;
6491 *vecp
++ = Fbuffer_modified_p (buf
);
6493 /* Fill up the vector with lambdas (always at least one). */
6495 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6496 < XVECTOR (frame_and_buffer_state
)->size
)
6498 /* Make sure we didn't overflow the vector. */
6499 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6500 > XVECTOR (frame_and_buffer_state
)->size
)
6507 /***********************************************************************
6509 ***********************************************************************/
6511 /* Initialization done when Emacs fork is started, before doing stty.
6512 Determine terminal type and set terminal_driver. Then invoke its
6513 decoding routine to set up variables in the terminal package. */
6518 char *terminal_type
;
6520 #ifdef HAVE_X_WINDOWS
6521 extern int display_arg
;
6524 /* Construct the space glyph. */
6525 space_glyph
.type
= CHAR_GLYPH
;
6526 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6527 space_glyph
.charpos
= -1;
6530 cursor_in_echo_area
= 0;
6531 terminal_type
= (char *) 0;
6533 /* Now is the time to initialize this; it's used by init_sys_modes
6535 Vwindow_system
= Qnil
;
6537 /* If the user wants to use a window system, we shouldn't bother
6538 initializing the terminal. This is especially important when the
6539 terminal is so dumb that emacs gives up before and doesn't bother
6540 using the window system.
6542 If the DISPLAY environment variable is set and nonempty,
6543 try to use X, and die with an error message if that doesn't work. */
6545 #ifdef HAVE_X_WINDOWS
6550 display
= getenv ("DECW$DISPLAY");
6552 display
= getenv ("DISPLAY");
6555 display_arg
= (display
!= 0 && *display
!= 0);
6558 if (!inhibit_window_system
&& display_arg
6564 Vwindow_system
= intern ("x");
6566 Vwindow_system_version
= make_number (11);
6568 Vwindow_system_version
= make_number (10);
6570 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6571 /* In some versions of ncurses,
6572 tputs crashes if we have not called tgetent.
6574 { char b
[2044]; tgetent (b
, "xterm");}
6576 adjust_frame_glyphs_initially ();
6579 #endif /* HAVE_X_WINDOWS */
6582 if (!inhibit_window_system
)
6584 Vwindow_system
= intern ("w32");
6585 Vwindow_system_version
= make_number (1);
6586 adjust_frame_glyphs_initially ();
6589 #endif /* HAVE_NTGUI */
6592 if (!inhibit_window_system
)
6594 Vwindow_system
= intern ("mac");
6595 Vwindow_system_version
= make_number (1);
6596 adjust_frame_glyphs_initially ();
6601 /* If no window system has been specified, try to use the terminal. */
6604 fatal ("standard input is not a tty");
6608 /* Look at the TERM variable. */
6609 terminal_type
= (char *) getenv ("TERM");
6613 fprintf (stderr
, "Please specify your terminal type.\n\
6614 For types defined in VMS, use set term /device=TYPE.\n\
6615 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6616 \(The quotation marks are necessary since terminal types are lower case.)\n");
6618 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6624 /* VMS DCL tends to up-case things, so down-case term type.
6625 Hardly any uppercase letters in terminal types; should be none. */
6627 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6630 strcpy (new, terminal_type
);
6632 for (p
= new; *p
; p
++)
6636 terminal_type
= new;
6641 struct tty_display_info
*tty
;
6643 tty
= term_init (selected_frame
, 0, terminal_type
);
6644 change_frame_size (XFRAME (selected_frame
), FrameRows (tty
), FrameCols (tty
), 0, 0, 1);
6648 struct frame
*sf
= SELECTED_FRAME ();
6649 int width
= FRAME_TOTAL_COLS (sf
);
6650 int height
= FRAME_LINES (sf
);
6652 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6654 /* If these sizes are so big they cause overflow, just ignore the
6655 change. It's not clear what better we could do. */
6656 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6657 fatal ("screen size %dx%d too big", width
, height
);
6660 adjust_frame_glyphs_initially ();
6661 calculate_costs (XFRAME (selected_frame
));
6666 #endif /* CANNOT_DUMP */
6667 signal (SIGWINCH
, window_change_signal
);
6668 #endif /* SIGWINCH */
6670 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6674 /* The MSDOS terminal turns on its ``window system'' relatively
6675 late into the startup, so we cannot do the frame faces'
6676 initialization just yet. It will be done later by pc-win.el
6677 and internal_terminal_init. */
6678 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6680 && NILP (Vwindow_system
))
6682 /* For the initial frame, we don't have any way of knowing what
6683 are the foreground and background colors of the terminal. */
6684 struct frame
*sf
= SELECTED_FRAME();
6686 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6687 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6688 call0 (intern ("tty-set-up-initial-frame-faces"));
6694 /***********************************************************************
6696 ***********************************************************************/
6698 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6699 Sinternal_show_cursor
, 2, 2, 0,
6700 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6701 WINDOW nil means use the selected window. SHOW non-nil means
6702 show a cursor in WINDOW in the next redisplay. SHOW nil means
6703 don't show a cursor. */)
6705 Lisp_Object window
, show
;
6707 /* Don't change cursor state while redisplaying. This could confuse
6709 if (!redisplaying_p
)
6712 window
= selected_window
;
6714 CHECK_WINDOW (window
);
6716 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6723 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6724 Sinternal_show_cursor_p
, 0, 1, 0,
6725 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6726 WINDOW nil or omitted means report on the selected window. */)
6733 window
= selected_window
;
6735 CHECK_WINDOW (window
);
6737 w
= XWINDOW (window
);
6738 return w
->cursor_off_p
? Qnil
: Qt
;
6742 /***********************************************************************
6744 ***********************************************************************/
6749 defsubr (&Sredraw_frame
);
6750 defsubr (&Sredraw_display
);
6751 defsubr (&Sframe_or_buffer_changed_p
);
6752 defsubr (&Sopen_termscript
);
6754 defsubr (&Ssit_for
);
6755 defsubr (&Ssleep_for
);
6756 defsubr (&Ssend_string_to_terminal
);
6757 defsubr (&Sinternal_show_cursor
);
6758 defsubr (&Sinternal_show_cursor_p
);
6761 defsubr (&Sdump_redisplay_history
);
6764 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6765 staticpro (&frame_and_buffer_state
);
6767 Qdisplay_table
= intern ("display-table");
6768 staticpro (&Qdisplay_table
);
6769 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6770 staticpro (&Qredisplay_dont_pause
);
6772 DEFVAR_INT ("baud-rate", &baud_rate
,
6773 doc
: /* *The output baud rate of the terminal.
6774 On most systems, changing this value will affect the amount of padding
6775 and the other strategic decisions made during redisplay. */);
6777 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6778 doc
: /* *Non-nil means invert the entire frame display.
6779 This means everything is in inverse video which otherwise would not be. */);
6781 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6782 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6784 See also `ring-bell-function'. */);
6786 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6787 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6788 A non-nil value is useful if the terminal can automatically preserve
6789 Emacs's frame display when you reenter Emacs.
6790 It is up to you to set this variable if your terminal can do that. */);
6792 DEFVAR_LISP ("window-system", &Vwindow_system
,
6793 doc
: /* Name of window system that Emacs is displaying through.
6794 The value is a symbol--for instance, `x' for X windows.
6795 The value is nil if Emacs is using a text-only terminal. */);
6797 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6798 doc
: /* The version number of the window system in use.
6799 For X windows, this is 10 or 11. */);
6801 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6802 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6804 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6805 doc
: /* Table defining how to output a glyph code to the frame.
6806 If not nil, this is a vector indexed by glyph code to define the glyph.
6807 Each element can be:
6808 integer: a glyph code which this glyph is an alias for.
6809 string: output this glyph using that string (not impl. in X windows).
6810 nil: this glyph mod 524288 is the code of a character to output,
6811 and this glyph / 524288 is the face number (see `face-id') to use
6812 while outputting it. */);
6813 Vglyph_table
= Qnil
;
6815 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6816 doc
: /* Display table to use for buffers that specify none.
6817 See `buffer-display-table' for more information. */);
6818 Vstandard_display_table
= Qnil
;
6820 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6821 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6822 redisplay_dont_pause
= 0;
6824 /* Initialize `window-system', unless init_display already decided it. */
6829 Vwindow_system
= Qnil
;
6830 Vwindow_system_version
= Qnil
;
6834 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6835 (do not change this comment) */