1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
35 #include "termhooks.h"
36 /* cm.h must come after dispextern.h on Windows. */
37 #include "dispextern.h"
40 #include "character.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 /* Stdio stream being used for copy of all output. */
266 /* Structure for info on cursor positioning. */
270 /* 1 means SIGWINCH happened when not safe. */
272 int delayed_size_change
;
274 /* 1 means glyph initialization has been completed at startup. */
276 static int glyphs_initialized_initially_p
;
278 /* Updated window if != 0. Set by update_window. */
280 struct window
*updated_window
;
282 /* Glyph row updated in update_window_line, and area that is updated. */
284 struct glyph_row
*updated_row
;
287 /* A glyph for a space. */
289 struct glyph space_glyph
;
291 /* Non-zero means update has been performed directly, so that there's
292 no need for redisplay_internal to do much work. Set by
293 direct_output_for_insert. */
295 int redisplay_performed_directly_p
;
297 /* Counts of allocated structures. These counts serve to diagnose
298 memory leaks and double frees. */
300 int glyph_matrix_count
;
301 int glyph_pool_count
;
303 /* If non-null, the frame whose frame matrices are manipulated. If
304 null, window matrices are worked on. */
306 static struct frame
*frame_matrix_frame
;
308 /* Current interface for window-based redisplay. Set from init_xterm.
309 A null value means we are not using window-based redisplay. */
311 struct redisplay_interface
*rif
;
313 /* Non-zero means that fonts have been loaded since the last glyph
314 matrix adjustments. Redisplay must stop, and glyph matrices must
315 be adjusted when this flag becomes non-zero during display. The
316 reason fonts can be loaded so late is that fonts of fontsets are
321 /* Convert vpos and hpos from frame to window and vice versa.
322 This may only be used for terminal frames. */
326 static int window_to_frame_vpos
P_ ((struct window
*, int));
327 static int window_to_frame_hpos
P_ ((struct window
*, int));
328 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
329 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
331 /* One element of the ring buffer containing redisplay history
334 struct redisplay_history
336 char trace
[512 + 100];
339 /* The size of the history buffer. */
341 #define REDISPLAY_HISTORY_SIZE 30
343 /* The redisplay history buffer. */
345 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
347 /* Next free entry in redisplay_history. */
349 static int history_idx
;
351 /* A tick that's incremented each time something is added to the
354 static unsigned history_tick
;
356 static void add_frame_display_history
P_ ((struct frame
*, int));
357 static void add_window_display_history
P_ ((struct window
*, char *, int));
359 /* Add to the redisplay history how window W has been displayed.
360 MSG is a trace containing the information how W's glyph matrix
361 has been constructed. PAUSED_P non-zero means that the update
362 has been interrupted for pending input. */
365 add_window_display_history (w
, msg
, paused_p
)
372 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
374 buf
= redisplay_history
[history_idx
].trace
;
377 sprintf (buf
, "%d: window %p (`%s')%s\n",
380 ((BUFFERP (w
->buffer
)
381 && STRINGP (XBUFFER (w
->buffer
)->name
))
382 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
384 paused_p
? " ***paused***" : "");
389 /* Add to the redisplay history that frame F has been displayed.
390 PAUSED_P non-zero means that the update has been interrupted for
394 add_frame_display_history (f
, paused_p
)
400 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
402 buf
= redisplay_history
[history_idx
].trace
;
405 sprintf (buf
, "%d: update frame %p%s",
407 f
, paused_p
? " ***paused***" : "");
411 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
412 Sdump_redisplay_history
, 0, 0, "",
413 doc
: /* Dump redisplay history to stderr. */)
418 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
421 i
= REDISPLAY_HISTORY_SIZE
- 1;
422 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
429 #else /* GLYPH_DEBUG == 0 */
431 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
432 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
434 #endif /* GLYPH_DEBUG == 0 */
437 /* Like bcopy except never gets confused by overlap. Let this be the
438 first function defined in this file, or change emacs.c where the
439 address of this function is used. */
442 safe_bcopy (from
, to
, size
)
447 if (size
<= 0 || from
== to
)
450 /* If the source and destination don't overlap, then bcopy can
451 handle it. If they do overlap, but the destination is lower in
452 memory than the source, we'll assume bcopy can handle that. */
453 if (to
< from
|| from
+ size
<= to
)
454 bcopy (from
, to
, size
);
456 /* Otherwise, we'll copy from the end. */
459 register const char *endf
= from
+ size
;
460 register char *endt
= to
+ size
;
462 /* If TO - FROM is large, then we should break the copy into
463 nonoverlapping chunks of TO - FROM bytes each. However, if
464 TO - FROM is small, then the bcopy function call overhead
465 makes this not worth it. The crossover point could be about
466 anywhere. Since I don't think the obvious copy loop is too
467 bad, I'm trying to err in its favor. */
472 while (endf
!= from
);
484 bcopy (endf
, endt
, to
- from
);
487 /* If SIZE wasn't a multiple of TO - FROM, there will be a
488 little left over. The amount left over is (endt + (to -
489 from)) - to, which is endt - from. */
490 bcopy (from
, to
, endt
- from
);
497 /***********************************************************************
499 ***********************************************************************/
501 /* Allocate and return a glyph_matrix structure. POOL is the glyph
502 pool from which memory for the matrix should be allocated, or null
503 for window-based redisplay where no glyph pools are used. The
504 member `pool' of the glyph matrix structure returned is set to
505 POOL, the structure is otherwise zeroed. */
507 struct glyph_matrix
*
508 new_glyph_matrix (pool
)
509 struct glyph_pool
*pool
;
511 struct glyph_matrix
*result
;
513 /* Allocate and clear. */
514 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
515 bzero (result
, sizeof *result
);
517 /* Increment number of allocated matrices. This count is used
518 to detect memory leaks. */
519 ++glyph_matrix_count
;
521 /* Set pool and return. */
527 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
529 The global counter glyph_matrix_count is decremented when a matrix
530 is freed. If the count gets negative, more structures were freed
531 than allocated, i.e. one matrix was freed more than once or a bogus
532 pointer was passed to this function.
534 If MATRIX->pool is null, this means that the matrix manages its own
535 glyph memory---this is done for matrices on X frames. Freeing the
536 matrix also frees the glyph memory in this case. */
539 free_glyph_matrix (matrix
)
540 struct glyph_matrix
*matrix
;
546 /* Detect the case that more matrices are freed than were
548 if (--glyph_matrix_count
< 0)
551 /* Free glyph memory if MATRIX owns it. */
552 if (matrix
->pool
== NULL
)
553 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
554 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
556 /* Free row structures and the matrix itself. */
557 xfree (matrix
->rows
);
563 /* Return the number of glyphs to reserve for a marginal area of
564 window W. TOTAL_GLYPHS is the number of glyphs in a complete
565 display line of window W. MARGIN gives the width of the marginal
566 area in canonical character units. MARGIN should be an integer
570 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
577 if (NUMBERP (margin
))
579 int width
= XFASTINT (w
->total_cols
);
580 double d
= max (0, XFLOATINT (margin
));
581 d
= min (width
/ 2 - 1, d
);
582 n
= (int) ((double) total_glyphs
/ width
* d
);
591 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
594 W is null if the function is called for a frame glyph matrix.
595 Otherwise it is the window MATRIX is a member of. X and Y are the
596 indices of the first column and row of MATRIX within the frame
597 matrix, if such a matrix exists. They are zero for purely
598 window-based redisplay. DIM is the needed size of the matrix.
600 In window-based redisplay, where no frame matrices exist, glyph
601 matrices manage their own glyph storage. Otherwise, they allocate
602 storage from a common frame glyph pool which can be found in
605 The reason for this memory management strategy is to avoid complete
606 frame redraws if possible. When we allocate from a common pool, a
607 change of the location or size of a sub-matrix within the pool
608 requires a complete redisplay of the frame because we cannot easily
609 make sure that the current matrices of all windows still agree with
610 what is displayed on the screen. While this is usually fast, it
611 leads to screen flickering. */
614 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
616 struct glyph_matrix
*matrix
;
622 int marginal_areas_changed_p
= 0;
623 int header_line_changed_p
= 0;
624 int header_line_p
= 0;
625 int left
= -1, right
= -1;
626 int window_width
= -1, window_height
;
628 /* See if W had a header line that has disappeared now, or vice versa.
632 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
634 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
635 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
637 matrix
->header_line_p
= header_line_p
;
639 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
640 Do nothing if MATRIX' size, position, vscroll, and marginal areas
641 haven't changed. This optimization is important because preserving
642 the matrix means preventing redisplay. */
643 if (matrix
->pool
== NULL
)
645 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
646 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
647 xassert (left
>= 0 && right
>= 0);
648 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
649 || right
!= matrix
->right_margin_glyphs
);
651 if (!marginal_areas_changed_p
653 && !header_line_changed_p
654 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
655 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
656 && matrix
->window_height
== window_height
657 && matrix
->window_vscroll
== w
->vscroll
658 && matrix
->window_width
== window_width
)
662 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
663 if (matrix
->rows_allocated
< dim
.height
)
665 int size
= dim
.height
* sizeof (struct glyph_row
);
666 new_rows
= dim
.height
- matrix
->rows_allocated
;
667 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
668 bzero (matrix
->rows
+ matrix
->rows_allocated
,
669 new_rows
* sizeof *matrix
->rows
);
670 matrix
->rows_allocated
= dim
.height
;
675 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
676 on a frame not using window-based redisplay. Set up pointers for
677 each row into the glyph pool. */
680 xassert (matrix
->pool
->glyphs
);
684 left
= margin_glyphs_to_reserve (w
, dim
.width
,
685 w
->left_margin_cols
);
686 right
= margin_glyphs_to_reserve (w
, dim
.width
,
687 w
->right_margin_cols
);
692 for (i
= 0; i
< dim
.height
; ++i
)
694 struct glyph_row
*row
= &matrix
->rows
[i
];
696 row
->glyphs
[LEFT_MARGIN_AREA
]
697 = (matrix
->pool
->glyphs
698 + (y
+ i
) * matrix
->pool
->ncolumns
702 || row
== matrix
->rows
+ dim
.height
- 1
703 || (row
== matrix
->rows
&& matrix
->header_line_p
))
705 row
->glyphs
[TEXT_AREA
]
706 = row
->glyphs
[LEFT_MARGIN_AREA
];
707 row
->glyphs
[RIGHT_MARGIN_AREA
]
708 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
709 row
->glyphs
[LAST_AREA
]
710 = row
->glyphs
[RIGHT_MARGIN_AREA
];
714 row
->glyphs
[TEXT_AREA
]
715 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
716 row
->glyphs
[RIGHT_MARGIN_AREA
]
717 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
718 row
->glyphs
[LAST_AREA
]
719 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
723 matrix
->left_margin_glyphs
= left
;
724 matrix
->right_margin_glyphs
= right
;
728 /* If MATRIX->pool is null, MATRIX is responsible for managing
729 its own memory. It is a window matrix for window-based redisplay.
730 Allocate glyph memory from the heap. */
731 if (dim
.width
> matrix
->matrix_w
733 || header_line_changed_p
734 || marginal_areas_changed_p
)
736 struct glyph_row
*row
= matrix
->rows
;
737 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
741 row
->glyphs
[LEFT_MARGIN_AREA
]
742 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
744 * sizeof (struct glyph
)));
746 /* The mode line never has marginal areas. */
747 if (row
== matrix
->rows
+ dim
.height
- 1
748 || (row
== matrix
->rows
&& matrix
->header_line_p
))
750 row
->glyphs
[TEXT_AREA
]
751 = row
->glyphs
[LEFT_MARGIN_AREA
];
752 row
->glyphs
[RIGHT_MARGIN_AREA
]
753 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
754 row
->glyphs
[LAST_AREA
]
755 = row
->glyphs
[RIGHT_MARGIN_AREA
];
759 row
->glyphs
[TEXT_AREA
]
760 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
761 row
->glyphs
[RIGHT_MARGIN_AREA
]
762 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
763 row
->glyphs
[LAST_AREA
]
764 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
770 xassert (left
>= 0 && right
>= 0);
771 matrix
->left_margin_glyphs
= left
;
772 matrix
->right_margin_glyphs
= right
;
775 /* Number of rows to be used by MATRIX. */
776 matrix
->nrows
= dim
.height
;
777 xassert (matrix
->nrows
>= 0);
781 if (matrix
== w
->current_matrix
)
783 /* Mark rows in a current matrix of a window as not having
784 valid contents. It's important to not do this for
785 desired matrices. When Emacs starts, it may already be
786 building desired matrices when this function runs. */
787 if (window_width
< 0)
788 window_width
= window_box_width (w
, -1);
790 /* Optimize the case that only the height has changed (C-x 2,
791 upper window). Invalidate all rows that are no longer part
793 if (!marginal_areas_changed_p
794 && !header_line_changed_p
796 && dim
.width
== matrix
->matrix_w
797 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
798 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
799 && matrix
->window_width
== window_width
)
801 /* Find the last row in the window. */
802 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
803 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
809 /* Window end is invalid, if inside of the rows that
810 are invalidated below. */
811 if (INTEGERP (w
->window_end_vpos
)
812 && XFASTINT (w
->window_end_vpos
) >= i
)
813 w
->window_end_valid
= Qnil
;
815 while (i
< matrix
->nrows
)
816 matrix
->rows
[i
++].enabled_p
= 0;
820 for (i
= 0; i
< matrix
->nrows
; ++i
)
821 matrix
->rows
[i
].enabled_p
= 0;
824 else if (matrix
== w
->desired_matrix
)
826 /* Rows in desired matrices always have to be cleared;
827 redisplay expects this is the case when it runs, so it
828 had better be the case when we adjust matrices between
830 for (i
= 0; i
< matrix
->nrows
; ++i
)
831 matrix
->rows
[i
].enabled_p
= 0;
836 /* Remember last values to be able to optimize frame redraws. */
837 matrix
->matrix_x
= x
;
838 matrix
->matrix_y
= y
;
839 matrix
->matrix_w
= dim
.width
;
840 matrix
->matrix_h
= dim
.height
;
842 /* Record the top y location and height of W at the time the matrix
843 was last adjusted. This is used to optimize redisplay above. */
846 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
847 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
848 matrix
->window_height
= window_height
;
849 matrix
->window_width
= window_width
;
850 matrix
->window_vscroll
= w
->vscroll
;
855 /* Reverse the contents of rows in MATRIX between START and END. The
856 contents of the row at END - 1 end up at START, END - 2 at START +
857 1 etc. This is part of the implementation of rotate_matrix (see
861 reverse_rows (matrix
, start
, end
)
862 struct glyph_matrix
*matrix
;
867 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
869 /* Non-ISO HP/UX compiler doesn't like auto struct
871 struct glyph_row temp
;
872 temp
= matrix
->rows
[i
];
873 matrix
->rows
[i
] = matrix
->rows
[j
];
874 matrix
->rows
[j
] = temp
;
879 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
880 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
881 indices. (Note: this does not copy glyphs, only glyph pointers in
882 row structures are moved around).
884 The algorithm used for rotating the vector was, I believe, first
885 described by Kernighan. See the vector R as consisting of two
886 sub-vectors AB, where A has length BY for BY >= 0. The result
887 after rotating is then BA. Reverse both sub-vectors to get ArBr
888 and reverse the result to get (ArBr)r which is BA. Similar for
892 rotate_matrix (matrix
, first
, last
, by
)
893 struct glyph_matrix
*matrix
;
898 /* Up (rotate left, i.e. towards lower indices). */
900 reverse_rows (matrix
, first
, first
+ by
);
901 reverse_rows (matrix
, first
+ by
, last
);
902 reverse_rows (matrix
, first
, last
);
906 /* Down (rotate right, i.e. towards higher indices). */
907 reverse_rows (matrix
, last
- by
, last
);
908 reverse_rows (matrix
, first
, last
- by
);
909 reverse_rows (matrix
, first
, last
);
914 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
915 with indices START <= index < END. Increment positions by DELTA/
919 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
920 struct glyph_matrix
*matrix
;
921 int start
, end
, delta
, delta_bytes
;
923 /* Check that START and END are reasonable values. */
924 xassert (start
>= 0 && start
<= matrix
->nrows
);
925 xassert (end
>= 0 && end
<= matrix
->nrows
);
926 xassert (start
<= end
);
928 for (; start
< end
; ++start
)
929 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
933 /* Enable a range of rows in glyph matrix MATRIX. START and END are
934 the row indices of the first and last + 1 row to enable. If
935 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
938 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
939 struct glyph_matrix
*matrix
;
943 xassert (start
<= end
);
944 xassert (start
>= 0 && start
< matrix
->nrows
);
945 xassert (end
>= 0 && end
<= matrix
->nrows
);
947 for (; start
< end
; ++start
)
948 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
954 This empties all rows in MATRIX by setting the enabled_p flag for
955 all rows of the matrix to zero. The function prepare_desired_row
956 will eventually really clear a row when it sees one with a zero
959 Resets update hints to defaults value. The only update hint
960 currently present is the flag MATRIX->no_scrolling_p. */
963 clear_glyph_matrix (matrix
)
964 struct glyph_matrix
*matrix
;
968 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
969 matrix
->no_scrolling_p
= 0;
974 /* Shift part of the glyph matrix MATRIX of window W up or down.
975 Increment y-positions in glyph rows between START and END by DY,
976 and recompute their visible height. */
979 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
981 struct glyph_matrix
*matrix
;
986 xassert (start
<= end
);
987 xassert (start
>= 0 && start
< matrix
->nrows
);
988 xassert (end
>= 0 && end
<= matrix
->nrows
);
990 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
991 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
993 for (; start
< end
; ++start
)
995 struct glyph_row
*row
= &matrix
->rows
[start
];
998 row
->visible_height
= row
->height
;
1001 row
->visible_height
-= min_y
- row
->y
;
1002 if (row
->y
+ row
->height
> max_y
)
1003 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1008 /* Mark all rows in current matrices of frame F as invalid. Marking
1009 invalid is done by setting enabled_p to zero for all rows in a
1013 clear_current_matrices (f
)
1014 register struct frame
*f
;
1016 /* Clear frame current matrix, if we have one. */
1017 if (f
->current_matrix
)
1018 clear_glyph_matrix (f
->current_matrix
);
1020 /* Clear the matrix of the menu bar window, if such a window exists.
1021 The menu bar window is currently used to display menus on X when
1022 no toolkit support is compiled in. */
1023 if (WINDOWP (f
->menu_bar_window
))
1024 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1026 /* Clear the matrix of the tool-bar window, if any. */
1027 if (WINDOWP (f
->tool_bar_window
))
1028 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1030 /* Clear current window matrices. */
1031 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1032 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1036 /* Clear out all display lines of F for a coming redisplay. */
1039 clear_desired_matrices (f
)
1040 register struct frame
*f
;
1042 if (f
->desired_matrix
)
1043 clear_glyph_matrix (f
->desired_matrix
);
1045 if (WINDOWP (f
->menu_bar_window
))
1046 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1048 if (WINDOWP (f
->tool_bar_window
))
1049 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1051 /* Do it for window matrices. */
1052 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1053 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1057 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1058 non-zero clear desired matrices, otherwise clear current matrices. */
1061 clear_window_matrices (w
, desired_p
)
1067 if (!NILP (w
->hchild
))
1069 xassert (WINDOWP (w
->hchild
));
1070 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1072 else if (!NILP (w
->vchild
))
1074 xassert (WINDOWP (w
->vchild
));
1075 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1080 clear_glyph_matrix (w
->desired_matrix
);
1083 clear_glyph_matrix (w
->current_matrix
);
1084 w
->window_end_valid
= Qnil
;
1088 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1094 /***********************************************************************
1097 See dispextern.h for an overall explanation of glyph rows.
1098 ***********************************************************************/
1100 /* Clear glyph row ROW. Do it in a way that makes it robust against
1101 changes in the glyph_row structure, i.e. addition or removal of
1102 structure members. */
1104 static struct glyph_row null_row
;
1107 clear_glyph_row (row
)
1108 struct glyph_row
*row
;
1110 struct glyph
*p
[1 + LAST_AREA
];
1112 /* Save pointers. */
1113 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1114 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1115 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1116 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1121 /* Restore pointers. */
1122 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1123 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1124 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1125 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1127 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1128 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1129 Redisplay outputs such glyphs, and flickering effects were
1130 the result. This also depended on the contents of memory
1131 returned by xmalloc. If flickering happens again, activate
1132 the code below. If the flickering is gone with that, chances
1133 are that the flickering has the same reason as here. */
1134 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1139 /* Make ROW an empty, enabled row of canonical character height,
1140 in window W starting at y-position Y. */
1143 blank_row (w
, row
, y
)
1145 struct glyph_row
*row
;
1150 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1151 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1153 clear_glyph_row (row
);
1155 row
->ascent
= row
->phys_ascent
= 0;
1156 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1157 row
->visible_height
= row
->height
;
1160 row
->visible_height
-= min_y
- row
->y
;
1161 if (row
->y
+ row
->height
> max_y
)
1162 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1168 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1169 are the amounts by which to change positions. Note that the first
1170 glyph of the text area of a row can have a buffer position even if
1171 the used count of the text area is zero. Such rows display line
1175 increment_row_positions (row
, delta
, delta_bytes
)
1176 struct glyph_row
*row
;
1177 int delta
, delta_bytes
;
1181 /* Increment start and end positions. */
1182 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1183 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1184 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1185 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1187 if (!row
->enabled_p
)
1190 /* Increment positions in glyphs. */
1191 for (area
= 0; area
< LAST_AREA
; ++area
)
1192 for (i
= 0; i
< row
->used
[area
]; ++i
)
1193 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1194 && row
->glyphs
[area
][i
].charpos
> 0)
1195 row
->glyphs
[area
][i
].charpos
+= delta
;
1197 /* Capture the case of rows displaying a line end. */
1198 if (row
->used
[TEXT_AREA
] == 0
1199 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1200 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1205 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1206 contents, i.e. glyph structure contents are exchanged between A and
1207 B without changing glyph pointers in A and B. */
1210 swap_glyphs_in_rows (a
, b
)
1211 struct glyph_row
*a
, *b
;
1215 for (area
= 0; area
< LAST_AREA
; ++area
)
1217 /* Number of glyphs to swap. */
1218 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1220 /* Start of glyphs in area of row A. */
1221 struct glyph
*glyph_a
= a
->glyphs
[area
];
1223 /* End + 1 of glyphs in area of row A. */
1224 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1226 /* Start of glyphs in area of row B. */
1227 struct glyph
*glyph_b
= b
->glyphs
[area
];
1229 while (glyph_a
< glyph_a_end
)
1231 /* Non-ISO HP/UX compiler doesn't like auto struct
1235 *glyph_a
= *glyph_b
;
1245 /* Exchange pointers to glyph memory between glyph rows A and B. */
1248 swap_glyph_pointers (a
, b
)
1249 struct glyph_row
*a
, *b
;
1252 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1254 struct glyph
*temp
= a
->glyphs
[i
];
1255 a
->glyphs
[i
] = b
->glyphs
[i
];
1256 b
->glyphs
[i
] = temp
;
1261 /* Copy glyph row structure FROM to glyph row structure TO, except
1262 that glyph pointers in the structures are left unchanged. */
1265 copy_row_except_pointers (to
, from
)
1266 struct glyph_row
*to
, *from
;
1268 struct glyph
*pointers
[1 + LAST_AREA
];
1270 /* Save glyph pointers of TO. */
1271 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1273 /* Do a structure assignment. */
1276 /* Restore original pointers of TO. */
1277 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1281 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1282 TO and FROM are left unchanged. Glyph contents are copied from the
1283 glyph memory of FROM to the glyph memory of TO. Increment buffer
1284 positions in row TO by DELTA/ DELTA_BYTES. */
1287 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1288 struct glyph_row
*to
, *from
;
1289 int delta
, delta_bytes
;
1293 /* This is like a structure assignment TO = FROM, except that
1294 glyph pointers in the rows are left unchanged. */
1295 copy_row_except_pointers (to
, from
);
1297 /* Copy glyphs from FROM to TO. */
1298 for (area
= 0; area
< LAST_AREA
; ++area
)
1299 if (from
->used
[area
])
1300 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1301 from
->used
[area
] * sizeof (struct glyph
));
1303 /* Increment buffer positions in TO by DELTA. */
1304 increment_row_positions (to
, delta
, delta_bytes
);
1308 /* Assign glyph row FROM to glyph row TO. This works like a structure
1309 assignment TO = FROM, except that glyph pointers are not copied but
1310 exchanged between TO and FROM. Pointers must be exchanged to avoid
1314 assign_row (to
, from
)
1315 struct glyph_row
*to
, *from
;
1317 swap_glyph_pointers (to
, from
);
1318 copy_row_except_pointers (to
, from
);
1322 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1323 a row in a window matrix, is a slice of the glyph memory of the
1324 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1325 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1326 memory of FRAME_ROW. */
1331 glyph_row_slice_p (window_row
, frame_row
)
1332 struct glyph_row
*window_row
, *frame_row
;
1334 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1335 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1336 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1338 return (frame_glyph_start
<= window_glyph_start
1339 && window_glyph_start
< frame_glyph_end
);
1342 #endif /* GLYPH_DEBUG */
1346 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1347 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1348 in WINDOW_MATRIX is found satisfying the condition. */
1350 static struct glyph_row
*
1351 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1352 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1357 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1359 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1360 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1361 frame_matrix
->rows
+ row
))
1364 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1369 /* Prepare ROW for display. Desired rows are cleared lazily,
1370 i.e. they are only marked as to be cleared by setting their
1371 enabled_p flag to zero. When a row is to be displayed, a prior
1372 call to this function really clears it. */
1375 prepare_desired_row (row
)
1376 struct glyph_row
*row
;
1378 if (!row
->enabled_p
)
1380 clear_glyph_row (row
);
1386 /* Return a hash code for glyph row ROW. */
1389 line_hash_code (row
)
1390 struct glyph_row
*row
;
1396 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1397 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1401 int c
= glyph
->u
.ch
;
1402 int face_id
= glyph
->face_id
;
1403 if (must_write_spaces
)
1405 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1406 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1418 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1419 the number of characters in the line. If must_write_spaces is
1420 zero, leading and trailing spaces are ignored. */
1423 line_draw_cost (matrix
, vpos
)
1424 struct glyph_matrix
*matrix
;
1427 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1428 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1429 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1431 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1432 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1434 /* Ignore trailing and leading spaces if we can. */
1435 if (!must_write_spaces
)
1437 /* Skip from the end over trailing spaces. */
1438 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1441 /* All blank line. */
1445 /* Skip over leading spaces. */
1446 while (CHAR_GLYPH_SPACE_P (*beg
))
1450 /* If we don't have a glyph-table, each glyph is one character,
1451 so return the number of glyphs. */
1452 if (glyph_table_base
== 0)
1456 /* Otherwise, scan the glyphs and accumulate their total length
1461 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1464 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1467 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1477 /* Test two glyph rows A and B for equality. Value is non-zero if A
1478 and B have equal contents. W is the window to which the glyphs
1479 rows A and B belong. It is needed here to test for partial row
1480 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1481 flags of A and B, too. */
1484 row_equal_p (w
, a
, b
, mouse_face_p
)
1486 struct glyph_row
*a
, *b
;
1491 else if (a
->hash
!= b
->hash
)
1495 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1498 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1501 /* Compare glyphs. */
1502 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1504 if (a
->used
[area
] != b
->used
[area
])
1507 a_glyph
= a
->glyphs
[area
];
1508 a_end
= a_glyph
+ a
->used
[area
];
1509 b_glyph
= b
->glyphs
[area
];
1511 while (a_glyph
< a_end
1512 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1513 ++a_glyph
, ++b_glyph
;
1515 if (a_glyph
!= a_end
)
1519 if (a
->fill_line_p
!= b
->fill_line_p
1520 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1521 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1522 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1523 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1524 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1525 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1526 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1527 || a
->overlapped_p
!= b
->overlapped_p
1528 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1529 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1530 /* Different partially visible characters on left margin. */
1532 /* Different height. */
1533 || a
->ascent
!= b
->ascent
1534 || a
->phys_ascent
!= b
->phys_ascent
1535 || a
->phys_height
!= b
->phys_height
1536 || a
->visible_height
!= b
->visible_height
)
1545 /***********************************************************************
1548 See dispextern.h for an overall explanation of glyph pools.
1549 ***********************************************************************/
1551 /* Allocate a glyph_pool structure. The structure returned is
1552 initialized with zeros. The global variable glyph_pool_count is
1553 incremented for each pool allocated. */
1555 static struct glyph_pool
*
1558 struct glyph_pool
*result
;
1560 /* Allocate a new glyph_pool and clear it. */
1561 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1562 bzero (result
, sizeof *result
);
1564 /* For memory leak and double deletion checking. */
1571 /* Free a glyph_pool structure POOL. The function may be called with
1572 a null POOL pointer. The global variable glyph_pool_count is
1573 decremented with every pool structure freed. If this count gets
1574 negative, more structures were freed than allocated, i.e. one
1575 structure must have been freed more than once or a bogus pointer
1576 was passed to free_glyph_pool. */
1579 free_glyph_pool (pool
)
1580 struct glyph_pool
*pool
;
1584 /* More freed than allocated? */
1586 xassert (glyph_pool_count
>= 0);
1588 xfree (pool
->glyphs
);
1594 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1595 columns we need. This function never shrinks a pool. The only
1596 case in which this would make sense, would be when a frame's size
1597 is changed from a large value to a smaller one. But, if someone
1598 does it once, we can expect that he will do it again.
1600 Value is non-zero if the pool changed in a way which makes
1601 re-adjusting window glyph matrices necessary. */
1604 realloc_glyph_pool (pool
, matrix_dim
)
1605 struct glyph_pool
*pool
;
1606 struct dim matrix_dim
;
1611 changed_p
= (pool
->glyphs
== 0
1612 || matrix_dim
.height
!= pool
->nrows
1613 || matrix_dim
.width
!= pool
->ncolumns
);
1615 /* Enlarge the glyph pool. */
1616 needed
= matrix_dim
.width
* matrix_dim
.height
;
1617 if (needed
> pool
->nglyphs
)
1619 int size
= needed
* sizeof (struct glyph
);
1622 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1625 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1626 bzero (pool
->glyphs
, size
);
1629 pool
->nglyphs
= needed
;
1632 /* Remember the number of rows and columns because (a) we use them
1633 to do sanity checks, and (b) the number of columns determines
1634 where rows in the frame matrix start---this must be available to
1635 determine pointers to rows of window sub-matrices. */
1636 pool
->nrows
= matrix_dim
.height
;
1637 pool
->ncolumns
= matrix_dim
.width
;
1644 /***********************************************************************
1646 ***********************************************************************/
1651 /* Flush standard output. This is sometimes useful to call from
1661 /* Check that no glyph pointers have been lost in MATRIX. If a
1662 pointer has been lost, e.g. by using a structure assignment between
1663 rows, at least one pointer must occur more than once in the rows of
1667 check_matrix_pointer_lossage (matrix
)
1668 struct glyph_matrix
*matrix
;
1672 for (i
= 0; i
< matrix
->nrows
; ++i
)
1673 for (j
= 0; j
< matrix
->nrows
; ++j
)
1675 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1676 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1680 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1683 matrix_row (matrix
, row
)
1684 struct glyph_matrix
*matrix
;
1687 xassert (matrix
&& matrix
->rows
);
1688 xassert (row
>= 0 && row
< matrix
->nrows
);
1690 /* That's really too slow for normal testing because this function
1691 is called almost everywhere. Although---it's still astonishingly
1692 fast, so it is valuable to have for debugging purposes. */
1694 check_matrix_pointer_lossage (matrix
);
1697 return matrix
->rows
+ row
;
1701 #if 0 /* This function makes invalid assumptions when text is
1702 partially invisible. But it might come handy for debugging
1705 /* Check invariants that must hold for an up to date current matrix of
1709 check_matrix_invariants (w
)
1712 struct glyph_matrix
*matrix
= w
->current_matrix
;
1713 int yb
= window_text_bottom_y (w
);
1714 struct glyph_row
*row
= matrix
->rows
;
1715 struct glyph_row
*last_text_row
= NULL
;
1716 struct buffer
*saved
= current_buffer
;
1717 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1720 /* This can sometimes happen for a fresh window. */
1721 if (matrix
->nrows
< 2)
1724 set_buffer_temp (buffer
);
1726 /* Note: last row is always reserved for the mode line. */
1727 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1728 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1730 struct glyph_row
*next
= row
+ 1;
1732 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1733 last_text_row
= row
;
1735 /* Check that character and byte positions are in sync. */
1736 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1737 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1739 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1740 have such a position temporarily in case of a minibuffer
1741 displaying something like `[Sole completion]' at its end. */
1742 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1743 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1744 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1746 /* Check that end position of `row' is equal to start position
1748 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1750 xassert (MATRIX_ROW_END_CHARPOS (row
)
1751 == MATRIX_ROW_START_CHARPOS (next
));
1752 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1753 == MATRIX_ROW_START_BYTEPOS (next
));
1758 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1759 xassert (w
->desired_matrix
->rows
!= NULL
);
1760 set_buffer_temp (saved
);
1765 #endif /* GLYPH_DEBUG != 0 */
1769 /**********************************************************************
1770 Allocating/ Adjusting Glyph Matrices
1771 **********************************************************************/
1773 /* Allocate glyph matrices over a window tree for a frame-based
1776 X and Y are column/row within the frame glyph matrix where
1777 sub-matrices for the window tree rooted at WINDOW must be
1778 allocated. CH_DIM contains the dimensions of the smallest
1779 character that could be used during display. DIM_ONLY_P non-zero
1780 means that the caller of this function is only interested in the
1781 result matrix dimension, and matrix adjustments should not be
1784 The function returns the total width/height of the sub-matrices of
1785 the window tree. If called on a frame root window, the computation
1786 will take the mini-buffer window into account.
1788 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1790 NEW_LEAF_MATRIX set if any window in the tree did not have a
1791 glyph matrices yet, and
1793 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1794 any window in the tree will be changed or have been changed (see
1797 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1800 Windows are arranged into chains of windows on the same level
1801 through the next fields of window structures. Such a level can be
1802 either a sequence of horizontally adjacent windows from left to
1803 right, or a sequence of vertically adjacent windows from top to
1804 bottom. Each window in a horizontal sequence can be either a leaf
1805 window or a vertical sequence; a window in a vertical sequence can
1806 be either a leaf or a horizontal sequence. All windows in a
1807 horizontal sequence have the same height, and all windows in a
1808 vertical sequence have the same width.
1810 This function uses, for historical reasons, a more general
1811 algorithm to determine glyph matrix dimensions that would be
1814 The matrix height of a horizontal sequence is determined by the
1815 maximum height of any matrix in the sequence. The matrix width of
1816 a horizontal sequence is computed by adding up matrix widths of
1817 windows in the sequence.
1819 |<------- result width ------->|
1820 +---------+----------+---------+ ---
1823 +---------+ | | result height
1828 The matrix width of a vertical sequence is the maximum matrix width
1829 of any window in the sequence. Its height is computed by adding up
1830 matrix heights of windows in the sequence.
1832 |<---- result width -->|
1840 +------------+---------+ |
1843 +------------+---------+ --- */
1845 /* Bit indicating that a new matrix will be allocated or has been
1848 #define NEW_LEAF_MATRIX (1 << 0)
1850 /* Bit indicating that a matrix will or has changed its location or
1853 #define CHANGED_LEAF_MATRIX (1 << 1)
1856 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1857 window_change_flags
)
1861 int *window_change_flags
;
1863 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1865 int wmax
= 0, hmax
= 0;
1869 int in_horz_combination_p
;
1871 /* What combination is WINDOW part of? Compute this once since the
1872 result is the same for all windows in the `next' chain. The
1873 special case of a root window (parent equal to nil) is treated
1874 like a vertical combination because a root window's `next'
1875 points to the mini-buffer window, if any, which is arranged
1876 vertically below other windows. */
1877 in_horz_combination_p
1878 = (!NILP (XWINDOW (window
)->parent
)
1879 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1881 /* For WINDOW and all windows on the same level. */
1884 w
= XWINDOW (window
);
1886 /* Get the dimension of the window sub-matrix for W, depending
1887 on whether this is a combination or a leaf window. */
1888 if (!NILP (w
->hchild
))
1889 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1891 window_change_flags
);
1892 else if (!NILP (w
->vchild
))
1893 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1895 window_change_flags
);
1898 /* If not already done, allocate sub-matrix structures. */
1899 if (w
->desired_matrix
== NULL
)
1901 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1902 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1903 *window_change_flags
|= NEW_LEAF_MATRIX
;
1906 /* Width and height MUST be chosen so that there are no
1907 holes in the frame matrix. */
1908 dim
.width
= required_matrix_width (w
);
1909 dim
.height
= required_matrix_height (w
);
1911 /* Will matrix be re-allocated? */
1912 if (x
!= w
->desired_matrix
->matrix_x
1913 || y
!= w
->desired_matrix
->matrix_y
1914 || dim
.width
!= w
->desired_matrix
->matrix_w
1915 || dim
.height
!= w
->desired_matrix
->matrix_h
1916 || (margin_glyphs_to_reserve (w
, dim
.width
,
1917 w
->left_margin_cols
)
1918 != w
->desired_matrix
->left_margin_glyphs
)
1919 || (margin_glyphs_to_reserve (w
, dim
.width
,
1920 w
->right_margin_cols
)
1921 != w
->desired_matrix
->right_margin_glyphs
))
1922 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1924 /* Actually change matrices, if allowed. Do not consider
1925 CHANGED_LEAF_MATRIX computed above here because the pool
1926 may have been changed which we don't now here. We trust
1927 that we only will be called with DIM_ONLY_P != 0 when
1931 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1932 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1936 /* If we are part of a horizontal combination, advance x for
1937 windows to the right of W; otherwise advance y for windows
1939 if (in_horz_combination_p
)
1944 /* Remember maximum glyph matrix dimensions. */
1945 wmax
= max (wmax
, dim
.width
);
1946 hmax
= max (hmax
, dim
.height
);
1948 /* Next window on same level. */
1951 while (!NILP (window
));
1953 /* Set `total' to the total glyph matrix dimension of this window
1954 level. In a vertical combination, the width is the width of the
1955 widest window; the height is the y we finally reached, corrected
1956 by the y we started with. In a horizontal combination, the total
1957 height is the height of the tallest window, and the width is the
1958 x we finally reached, corrected by the x we started with. */
1959 if (in_horz_combination_p
)
1961 total
.width
= x
- x0
;
1962 total
.height
= hmax
;
1967 total
.height
= y
- y0
;
1974 /* Return the required height of glyph matrices for window W. */
1977 required_matrix_height (w
)
1980 #ifdef HAVE_WINDOW_SYSTEM
1981 struct frame
*f
= XFRAME (w
->frame
);
1983 if (FRAME_WINDOW_P (f
))
1985 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1986 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1987 return (((window_pixel_height
+ ch_height
- 1)
1988 / ch_height
) * w
->nrows_scale_factor
1989 /* One partially visible line at the top and
1990 bottom of the window. */
1992 /* 2 for header and mode line. */
1995 #endif /* HAVE_WINDOW_SYSTEM */
1997 return WINDOW_TOTAL_LINES (w
);
2001 /* Return the required width of glyph matrices for window W. */
2004 required_matrix_width (w
)
2007 #ifdef HAVE_WINDOW_SYSTEM
2008 struct frame
*f
= XFRAME (w
->frame
);
2009 if (FRAME_WINDOW_P (f
))
2011 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2012 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2014 /* Compute number of glyphs needed in a glyph row. */
2015 return (((window_pixel_width
+ ch_width
- 1)
2016 / ch_width
) * w
->ncols_scale_factor
2017 /* 2 partially visible columns in the text area. */
2019 /* One partially visible column at the right
2020 edge of each marginal area. */
2023 #endif /* HAVE_WINDOW_SYSTEM */
2025 return XINT (w
->total_cols
);
2029 /* Allocate window matrices for window-based redisplay. W is the
2030 window whose matrices must be allocated/reallocated. CH_DIM is the
2031 size of the smallest character that could potentially be used on W. */
2034 allocate_matrices_for_window_redisplay (w
)
2039 if (!NILP (w
->vchild
))
2040 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2041 else if (!NILP (w
->hchild
))
2042 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2045 /* W is a leaf window. */
2048 /* If matrices are not yet allocated, allocate them now. */
2049 if (w
->desired_matrix
== NULL
)
2051 w
->desired_matrix
= new_glyph_matrix (NULL
);
2052 w
->current_matrix
= new_glyph_matrix (NULL
);
2055 dim
.width
= required_matrix_width (w
);
2056 dim
.height
= required_matrix_height (w
);
2057 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2058 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2061 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2066 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2067 do it for all frames; otherwise do it just for the given frame.
2068 This function must be called when a new frame is created, its size
2069 changes, or its window configuration changes. */
2075 /* Block input so that expose events and other events that access
2076 glyph matrices are not processed while we are changing them. */
2080 adjust_frame_glyphs (f
);
2083 Lisp_Object tail
, lisp_frame
;
2085 FOR_EACH_FRAME (tail
, lisp_frame
)
2086 adjust_frame_glyphs (XFRAME (lisp_frame
));
2093 /* Adjust frame glyphs when Emacs is initialized.
2095 To be called from init_display.
2097 We need a glyph matrix because redraw will happen soon.
2098 Unfortunately, window sizes on selected_frame are not yet set to
2099 meaningful values. I believe we can assume that there are only two
2100 windows on the frame---the mini-buffer and the root window. Frame
2101 height and width seem to be correct so far. So, set the sizes of
2102 windows to estimated values. */
2105 adjust_frame_glyphs_initially ()
2107 struct frame
*sf
= SELECTED_FRAME ();
2108 struct window
*root
= XWINDOW (sf
->root_window
);
2109 struct window
*mini
= XWINDOW (root
->next
);
2110 int frame_lines
= FRAME_LINES (sf
);
2111 int frame_cols
= FRAME_COLS (sf
);
2112 int top_margin
= FRAME_TOP_MARGIN (sf
);
2114 /* Do it for the root window. */
2115 XSETFASTINT (root
->top_line
, top_margin
);
2116 XSETFASTINT (root
->total_cols
, frame_cols
);
2117 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2119 /* Do it for the mini-buffer window. */
2120 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2121 XSETFASTINT (mini
->total_cols
, frame_cols
);
2122 set_window_height (root
->next
, 1, 0);
2124 adjust_frame_glyphs (sf
);
2125 glyphs_initialized_initially_p
= 1;
2129 /* Allocate/reallocate glyph matrices of a single frame F. */
2132 adjust_frame_glyphs (f
)
2135 if (FRAME_WINDOW_P (f
))
2136 adjust_frame_glyphs_for_window_redisplay (f
);
2138 adjust_frame_glyphs_for_frame_redisplay (f
);
2140 /* Don't forget the message buffer and the buffer for
2141 decode_mode_spec. */
2142 adjust_frame_message_buffer (f
);
2143 adjust_decode_mode_spec_buffer (f
);
2145 f
->glyphs_initialized_p
= 1;
2149 /* In the window tree with root W, build current matrices of leaf
2150 windows from the frame's current matrix. */
2153 fake_current_matrices (window
)
2158 for (; !NILP (window
); window
= w
->next
)
2160 w
= XWINDOW (window
);
2162 if (!NILP (w
->hchild
))
2163 fake_current_matrices (w
->hchild
);
2164 else if (!NILP (w
->vchild
))
2165 fake_current_matrices (w
->vchild
);
2169 struct frame
*f
= XFRAME (w
->frame
);
2170 struct glyph_matrix
*m
= w
->current_matrix
;
2171 struct glyph_matrix
*fm
= f
->current_matrix
;
2173 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2174 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2176 for (i
= 0; i
< m
->matrix_h
; ++i
)
2178 struct glyph_row
*r
= m
->rows
+ i
;
2179 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2181 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2182 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2184 r
->enabled_p
= fr
->enabled_p
;
2187 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2188 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2189 r
->used
[TEXT_AREA
] = (m
->matrix_w
2190 - r
->used
[LEFT_MARGIN_AREA
]
2191 - r
->used
[RIGHT_MARGIN_AREA
]);
2200 /* Save away the contents of frame F's current frame matrix. Value is
2201 a glyph matrix holding the contents of F's current frame matrix. */
2203 static struct glyph_matrix
*
2204 save_current_matrix (f
)
2208 struct glyph_matrix
*saved
;
2210 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2211 bzero (saved
, sizeof *saved
);
2212 saved
->nrows
= f
->current_matrix
->nrows
;
2213 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2214 * sizeof *saved
->rows
);
2215 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2217 for (i
= 0; i
< saved
->nrows
; ++i
)
2219 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2220 struct glyph_row
*to
= saved
->rows
+ i
;
2221 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2222 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2223 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2224 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2231 /* Restore the contents of frame F's current frame matrix from SAVED,
2232 and free memory associated with SAVED. */
2235 restore_current_matrix (f
, saved
)
2237 struct glyph_matrix
*saved
;
2241 for (i
= 0; i
< saved
->nrows
; ++i
)
2243 struct glyph_row
*from
= saved
->rows
+ i
;
2244 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2245 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2246 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2247 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2248 xfree (from
->glyphs
[TEXT_AREA
]);
2251 xfree (saved
->rows
);
2257 /* Allocate/reallocate glyph matrices of a single frame F for
2258 frame-based redisplay. */
2261 adjust_frame_glyphs_for_frame_redisplay (f
)
2264 struct dim matrix_dim
;
2266 int window_change_flags
;
2269 if (!FRAME_LIVE_P (f
))
2272 top_window_y
= FRAME_TOP_MARGIN (f
);
2274 /* Allocate glyph pool structures if not already done. */
2275 if (f
->desired_pool
== NULL
)
2277 f
->desired_pool
= new_glyph_pool ();
2278 f
->current_pool
= new_glyph_pool ();
2281 /* Allocate frames matrix structures if needed. */
2282 if (f
->desired_matrix
== NULL
)
2284 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2285 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2288 /* Compute window glyph matrices. (This takes the mini-buffer
2289 window into account). The result is the size of the frame glyph
2290 matrix needed. The variable window_change_flags is set to a bit
2291 mask indicating whether new matrices will be allocated or
2292 existing matrices change their size or location within the frame
2294 window_change_flags
= 0;
2296 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2299 &window_change_flags
);
2301 /* Add in menu bar lines, if any. */
2302 matrix_dim
.height
+= top_window_y
;
2304 /* Enlarge pools as necessary. */
2305 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2306 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2308 /* Set up glyph pointers within window matrices. Do this only if
2309 absolutely necessary since it requires a frame redraw. */
2310 if (pool_changed_p
|| window_change_flags
)
2312 /* Do it for window matrices. */
2313 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2315 &window_change_flags
);
2317 /* Size of frame matrices must equal size of frame. Note
2318 that we are called for X frames with window widths NOT equal
2319 to the frame width (from CHANGE_FRAME_SIZE_1). */
2320 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2321 && matrix_dim
.height
== FRAME_LINES (f
));
2323 /* Pointers to glyph memory in glyph rows are exchanged during
2324 the update phase of redisplay, which means in general that a
2325 frame's current matrix consists of pointers into both the
2326 desired and current glyph pool of the frame. Adjusting a
2327 matrix sets the frame matrix up so that pointers are all into
2328 the same pool. If we want to preserve glyph contents of the
2329 current matrix over a call to adjust_glyph_matrix, we must
2330 make a copy of the current glyphs, and restore the current
2331 matrix' contents from that copy. */
2332 if (display_completed
2333 && !FRAME_GARBAGED_P (f
)
2334 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2335 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2337 struct glyph_matrix
*copy
= save_current_matrix (f
);
2338 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2339 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2340 restore_current_matrix (f
, copy
);
2341 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2345 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2346 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2347 SET_FRAME_GARBAGED (f
);
2353 /* Allocate/reallocate glyph matrices of a single frame F for
2354 window-based redisplay. */
2357 adjust_frame_glyphs_for_window_redisplay (f
)
2362 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2364 /* Allocate/reallocate window matrices. */
2365 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2367 /* Allocate/ reallocate matrices of the dummy window used to display
2368 the menu bar under X when no X toolkit support is available. */
2369 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2371 /* Allocate a dummy window if not already done. */
2372 if (NILP (f
->menu_bar_window
))
2374 f
->menu_bar_window
= make_window ();
2375 w
= XWINDOW (f
->menu_bar_window
);
2376 XSETFRAME (w
->frame
, f
);
2377 w
->pseudo_window_p
= 1;
2380 w
= XWINDOW (f
->menu_bar_window
);
2382 /* Set window dimensions to frame dimensions and allocate or
2383 adjust glyph matrices of W. */
2384 XSETFASTINT (w
->top_line
, 0);
2385 XSETFASTINT (w
->left_col
, 0);
2386 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2387 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2388 allocate_matrices_for_window_redisplay (w
);
2390 #endif /* not USE_X_TOOLKIT */
2393 /* Allocate/ reallocate matrices of the tool bar window. If we
2394 don't have a tool bar window yet, make one. */
2395 if (NILP (f
->tool_bar_window
))
2397 f
->tool_bar_window
= make_window ();
2398 w
= XWINDOW (f
->tool_bar_window
);
2399 XSETFRAME (w
->frame
, f
);
2400 w
->pseudo_window_p
= 1;
2403 w
= XWINDOW (f
->tool_bar_window
);
2405 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2406 XSETFASTINT (w
->left_col
, 0);
2407 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2408 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2409 allocate_matrices_for_window_redisplay (w
);
2414 /* Adjust/ allocate message buffer of frame F.
2416 Note that the message buffer is never freed. Since I could not
2417 find a free in 19.34, I assume that freeing it would be
2418 problematic in some way and don't do it either.
2420 (Implementation note: It should be checked if we can free it
2421 eventually without causing trouble). */
2424 adjust_frame_message_buffer (f
)
2427 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2429 if (FRAME_MESSAGE_BUF (f
))
2431 char *buffer
= FRAME_MESSAGE_BUF (f
);
2432 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2433 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2436 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2440 /* Re-allocate buffer for decode_mode_spec on frame F. */
2443 adjust_decode_mode_spec_buffer (f
)
2446 f
->decode_mode_spec_buffer
2447 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2448 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2453 /**********************************************************************
2454 Freeing Glyph Matrices
2455 **********************************************************************/
2457 /* Free glyph memory for a frame F. F may be null. This function can
2458 be called for the same frame more than once. The root window of
2459 F may be nil when this function is called. This is the case when
2460 the function is called when F is destroyed. */
2466 if (f
&& f
->glyphs_initialized_p
)
2468 /* Block interrupt input so that we don't get surprised by an X
2469 event while we're in an inconsistent state. */
2471 f
->glyphs_initialized_p
= 0;
2473 /* Release window sub-matrices. */
2474 if (!NILP (f
->root_window
))
2475 free_window_matrices (XWINDOW (f
->root_window
));
2477 /* Free the dummy window for menu bars without X toolkit and its
2479 if (!NILP (f
->menu_bar_window
))
2481 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2482 free_glyph_matrix (w
->desired_matrix
);
2483 free_glyph_matrix (w
->current_matrix
);
2484 w
->desired_matrix
= w
->current_matrix
= NULL
;
2485 f
->menu_bar_window
= Qnil
;
2488 /* Free the tool bar window and its glyph matrices. */
2489 if (!NILP (f
->tool_bar_window
))
2491 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2492 free_glyph_matrix (w
->desired_matrix
);
2493 free_glyph_matrix (w
->current_matrix
);
2494 w
->desired_matrix
= w
->current_matrix
= NULL
;
2495 f
->tool_bar_window
= Qnil
;
2498 /* Release frame glyph matrices. Reset fields to zero in
2499 case we are called a second time. */
2500 if (f
->desired_matrix
)
2502 free_glyph_matrix (f
->desired_matrix
);
2503 free_glyph_matrix (f
->current_matrix
);
2504 f
->desired_matrix
= f
->current_matrix
= NULL
;
2507 /* Release glyph pools. */
2508 if (f
->desired_pool
)
2510 free_glyph_pool (f
->desired_pool
);
2511 free_glyph_pool (f
->current_pool
);
2512 f
->desired_pool
= f
->current_pool
= NULL
;
2520 /* Free glyph sub-matrices in the window tree rooted at W. This
2521 function may be called with a null pointer, and it may be called on
2522 the same tree more than once. */
2525 free_window_matrices (w
)
2530 if (!NILP (w
->hchild
))
2531 free_window_matrices (XWINDOW (w
->hchild
));
2532 else if (!NILP (w
->vchild
))
2533 free_window_matrices (XWINDOW (w
->vchild
));
2536 /* This is a leaf window. Free its memory and reset fields
2537 to zero in case this function is called a second time for
2539 free_glyph_matrix (w
->current_matrix
);
2540 free_glyph_matrix (w
->desired_matrix
);
2541 w
->current_matrix
= w
->desired_matrix
= NULL
;
2544 /* Next window on same level. */
2545 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2550 /* Check glyph memory leaks. This function is called from
2551 shut_down_emacs. Note that frames are not destroyed when Emacs
2552 exits. We therefore free all glyph memory for all active frames
2553 explicitly and check that nothing is left allocated. */
2556 check_glyph_memory ()
2558 Lisp_Object tail
, frame
;
2560 /* Free glyph memory for all frames. */
2561 FOR_EACH_FRAME (tail
, frame
)
2562 free_glyphs (XFRAME (frame
));
2564 /* Check that nothing is left allocated. */
2565 if (glyph_matrix_count
)
2567 if (glyph_pool_count
)
2573 /**********************************************************************
2574 Building a Frame Matrix
2575 **********************************************************************/
2577 /* Most of the redisplay code works on glyph matrices attached to
2578 windows. This is a good solution most of the time, but it is not
2579 suitable for terminal code. Terminal output functions cannot rely
2580 on being able to set an arbitrary terminal window. Instead they
2581 must be provided with a view of the whole frame, i.e. the whole
2582 screen. We build such a view by constructing a frame matrix from
2583 window matrices in this section.
2585 Windows that must be updated have their must_be_update_p flag set.
2586 For all such windows, their desired matrix is made part of the
2587 desired frame matrix. For other windows, their current matrix is
2588 made part of the desired frame matrix.
2590 +-----------------+----------------+
2591 | desired | desired |
2593 +-----------------+----------------+
2596 +----------------------------------+
2598 Desired window matrices can be made part of the frame matrix in a
2599 cheap way: We exploit the fact that the desired frame matrix and
2600 desired window matrices share their glyph memory. This is not
2601 possible for current window matrices. Their glyphs are copied to
2602 the desired frame matrix. The latter is equivalent to
2603 preserve_other_columns in the old redisplay.
2605 Used glyphs counters for frame matrix rows are the result of adding
2606 up glyph lengths of the window matrices. A line in the frame
2607 matrix is enabled, if a corresponding line in a window matrix is
2610 After building the desired frame matrix, it will be passed to
2611 terminal code, which will manipulate both the desired and current
2612 frame matrix. Changes applied to the frame's current matrix have
2613 to be visible in current window matrices afterwards, of course.
2615 This problem is solved like this:
2617 1. Window and frame matrices share glyphs. Window matrices are
2618 constructed in a way that their glyph contents ARE the glyph
2619 contents needed in a frame matrix. Thus, any modification of
2620 glyphs done in terminal code will be reflected in window matrices
2623 2. Exchanges of rows in a frame matrix done by terminal code are
2624 intercepted by hook functions so that corresponding row operations
2625 on window matrices can be performed. This is necessary because we
2626 use pointers to glyphs in glyph row structures. To satisfy the
2627 assumption of point 1 above that glyphs are updated implicitly in
2628 window matrices when they are manipulated via the frame matrix,
2629 window and frame matrix must of course agree where to find the
2630 glyphs for their rows. Possible manipulations that must be
2631 mirrored are assignments of rows of the desired frame matrix to the
2632 current frame matrix and scrolling the current frame matrix. */
2634 /* Build frame F's desired matrix from window matrices. Only windows
2635 which have the flag must_be_updated_p set have to be updated. Menu
2636 bar lines of a frame are not covered by window matrices, so make
2637 sure not to touch them in this function. */
2640 build_frame_matrix (f
)
2645 /* F must have a frame matrix when this function is called. */
2646 xassert (!FRAME_WINDOW_P (f
));
2648 /* Clear all rows in the frame matrix covered by window matrices.
2649 Menu bar lines are not covered by windows. */
2650 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2651 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2653 /* Build the matrix by walking the window tree. */
2654 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2655 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2659 /* Walk a window tree, building a frame matrix MATRIX from window
2660 matrices. W is the root of a window tree. */
2663 build_frame_matrix_from_window_tree (matrix
, w
)
2664 struct glyph_matrix
*matrix
;
2669 if (!NILP (w
->hchild
))
2670 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2671 else if (!NILP (w
->vchild
))
2672 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2674 build_frame_matrix_from_leaf_window (matrix
, w
);
2676 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2681 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2682 desired frame matrix built. W is a leaf window whose desired or
2683 current matrix is to be added to FRAME_MATRIX. W's flag
2684 must_be_updated_p determines which matrix it contributes to
2685 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2686 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2687 Adding a desired matrix means setting up used counters and such in
2688 frame rows, while adding a current window matrix to FRAME_MATRIX
2689 means copying glyphs. The latter case corresponds to
2690 preserve_other_columns in the old redisplay. */
2693 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2694 struct glyph_matrix
*frame_matrix
;
2697 struct glyph_matrix
*window_matrix
;
2698 int window_y
, frame_y
;
2699 /* If non-zero, a glyph to insert at the right border of W. */
2700 GLYPH right_border_glyph
= 0;
2702 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2703 if (w
->must_be_updated_p
)
2705 window_matrix
= w
->desired_matrix
;
2707 /* Decide whether we want to add a vertical border glyph. */
2708 if (!WINDOW_RIGHTMOST_P (w
))
2710 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2713 = ((dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
)))
2714 ? spec_glyph_lookup_face (w
, XINT (DISP_BORDER_GLYPH (dp
)))
2717 if (FAST_GLYPH_FACE (right_border_glyph
) <= 0)
2719 = FAST_MAKE_GLYPH (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2723 window_matrix
= w
->current_matrix
;
2725 /* For all rows in the window matrix and corresponding rows in the
2728 frame_y
= window_matrix
->matrix_y
;
2729 while (window_y
< window_matrix
->nrows
)
2731 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2732 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2733 int current_row_p
= window_matrix
== w
->current_matrix
;
2735 /* Fill up the frame row with spaces up to the left margin of the
2737 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2739 /* Fill up areas in the window matrix row with spaces. */
2740 fill_up_glyph_row_with_spaces (window_row
);
2742 /* If only part of W's desired matrix has been built, and
2743 window_row wasn't displayed, use the corresponding current
2745 if (window_matrix
== w
->desired_matrix
2746 && !window_row
->enabled_p
)
2748 window_row
= w
->current_matrix
->rows
+ window_y
;
2754 /* Copy window row to frame row. */
2755 bcopy (window_row
->glyphs
[0],
2756 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2757 window_matrix
->matrix_w
* sizeof (struct glyph
));
2761 xassert (window_row
->enabled_p
);
2763 /* Only when a desired row has been displayed, we want
2764 the corresponding frame row to be updated. */
2765 frame_row
->enabled_p
= 1;
2767 /* Maybe insert a vertical border between horizontally adjacent
2769 if (right_border_glyph
)
2771 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2772 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2776 /* Window row window_y must be a slice of frame row
2778 xassert (glyph_row_slice_p (window_row
, frame_row
));
2780 /* If rows are in sync, we don't have to copy glyphs because
2781 frame and window share glyphs. */
2783 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2784 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2788 /* Set number of used glyphs in the frame matrix. Since we fill
2789 up with spaces, and visit leaf windows from left to right it
2790 can be done simply. */
2791 frame_row
->used
[TEXT_AREA
]
2792 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2800 /* Given a user-specified glyph, possibly including a Lisp-level face
2801 ID, return a glyph that has a realized face ID.
2802 This is used for glyphs displayed specially and not part of the text;
2803 for instance, vertical separators, truncation markers, etc. */
2806 spec_glyph_lookup_face (w
, glyph
)
2810 int lface_id
= FAST_GLYPH_FACE (glyph
);
2811 /* Convert the glyph's specified face to a realized (cache) face. */
2814 int face_id
= merge_faces (XFRAME (w
->frame
),
2815 Qt
, lface_id
, DEFAULT_FACE_ID
);
2817 = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), face_id
);
2822 /* Add spaces to a glyph row ROW in a window matrix.
2824 Each row has the form:
2826 +---------+-----------------------------+------------+
2827 | left | text | right |
2828 +---------+-----------------------------+------------+
2830 Left and right marginal areas are optional. This function adds
2831 spaces to areas so that there are no empty holes between areas.
2832 In other words: If the right area is not empty, the text area
2833 is filled up with spaces up to the right area. If the text area
2834 is not empty, the left area is filled up.
2836 To be called for frame-based redisplay, only. */
2839 fill_up_glyph_row_with_spaces (row
)
2840 struct glyph_row
*row
;
2842 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2843 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2844 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2848 /* Fill area AREA of glyph row ROW with spaces. To be called for
2849 frame-based redisplay only. */
2852 fill_up_glyph_row_area_with_spaces (row
, area
)
2853 struct glyph_row
*row
;
2856 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2858 struct glyph
*end
= row
->glyphs
[area
+ 1];
2859 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2862 *text
++ = space_glyph
;
2863 row
->used
[area
] = text
- row
->glyphs
[area
];
2868 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2869 reached. In frame matrices only one area, TEXT_AREA, is used. */
2872 fill_up_frame_row_with_spaces (row
, upto
)
2873 struct glyph_row
*row
;
2876 int i
= row
->used
[TEXT_AREA
];
2877 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2880 glyph
[i
++] = space_glyph
;
2882 row
->used
[TEXT_AREA
] = i
;
2887 /**********************************************************************
2888 Mirroring operations on frame matrices in window matrices
2889 **********************************************************************/
2891 /* Set frame being updated via frame-based redisplay to F. This
2892 function must be called before updates to make explicit that we are
2893 working on frame matrices or not. */
2896 set_frame_matrix_frame (f
)
2899 frame_matrix_frame
= f
;
2903 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2904 DESIRED_MATRIX is the desired matrix corresponding to
2905 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2906 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2907 frame_matrix_frame is non-null, this indicates that the exchange is
2908 done in frame matrices, and that we have to perform analogous
2909 operations in window matrices of frame_matrix_frame. */
2912 make_current (desired_matrix
, current_matrix
, row
)
2913 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2916 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2917 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2918 int mouse_face_p
= current_row
->mouse_face_p
;
2920 /* Do current_row = desired_row. This exchanges glyph pointers
2921 between both rows, and does a structure assignment otherwise. */
2922 assign_row (current_row
, desired_row
);
2924 /* Enable current_row to mark it as valid. */
2925 current_row
->enabled_p
= 1;
2926 current_row
->mouse_face_p
= mouse_face_p
;
2928 /* If we are called on frame matrices, perform analogous operations
2929 for window matrices. */
2930 if (frame_matrix_frame
)
2931 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2935 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2936 W's frame which has been made current (by swapping pointers between
2937 current and desired matrix). Perform analogous operations in the
2938 matrices of leaf windows in the window tree rooted at W. */
2941 mirror_make_current (w
, frame_row
)
2947 if (!NILP (w
->hchild
))
2948 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2949 else if (!NILP (w
->vchild
))
2950 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2953 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2954 here because the checks performed in debug mode there
2955 will not allow the conversion. */
2956 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2958 /* If FRAME_ROW is within W, assign the desired row to the
2959 current row (exchanging glyph pointers). */
2960 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2962 struct glyph_row
*current_row
2963 = MATRIX_ROW (w
->current_matrix
, row
);
2964 struct glyph_row
*desired_row
2965 = MATRIX_ROW (w
->desired_matrix
, row
);
2967 if (desired_row
->enabled_p
)
2968 assign_row (current_row
, desired_row
);
2970 swap_glyph_pointers (desired_row
, current_row
);
2971 current_row
->enabled_p
= 1;
2975 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2980 /* Perform row dance after scrolling. We are working on the range of
2981 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2982 including) in MATRIX. COPY_FROM is a vector containing, for each
2983 row I in the range 0 <= I < NLINES, the index of the original line
2984 to move to I. This index is relative to the row range, i.e. 0 <=
2985 index < NLINES. RETAINED_P is a vector containing zero for each
2986 row 0 <= I < NLINES which is empty.
2988 This function is called from do_scrolling and do_direct_scrolling. */
2991 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2993 struct glyph_matrix
*matrix
;
2994 int unchanged_at_top
, nlines
;
2998 /* A copy of original rows. */
2999 struct glyph_row
*old_rows
;
3001 /* Rows to assign to. */
3002 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3006 /* Make a copy of the original rows. */
3007 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3008 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3010 /* Assign new rows, maybe clear lines. */
3011 for (i
= 0; i
< nlines
; ++i
)
3013 int enabled_before_p
= new_rows
[i
].enabled_p
;
3015 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3016 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3017 new_rows
[i
] = old_rows
[copy_from
[i
]];
3018 new_rows
[i
].enabled_p
= enabled_before_p
;
3020 /* RETAINED_P is zero for empty lines. */
3021 if (!retained_p
[copy_from
[i
]])
3022 new_rows
[i
].enabled_p
= 0;
3025 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3026 if (frame_matrix_frame
)
3027 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3028 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3032 /* Synchronize glyph pointers in the current matrix of window W with
3033 the current frame matrix. */
3036 sync_window_with_frame_matrix_rows (w
)
3039 struct frame
*f
= XFRAME (w
->frame
);
3040 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3041 int left
, right
, x
, width
;
3043 /* Preconditions: W must be a leaf window on a tty frame. */
3044 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3045 xassert (!FRAME_WINDOW_P (f
));
3047 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3048 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3049 x
= w
->current_matrix
->matrix_x
;
3050 width
= w
->current_matrix
->matrix_w
;
3052 window_row
= w
->current_matrix
->rows
;
3053 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3054 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3056 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3058 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3059 = frame_row
->glyphs
[0] + x
;
3060 window_row
->glyphs
[TEXT_AREA
]
3061 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3062 window_row
->glyphs
[LAST_AREA
]
3063 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3064 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3065 = window_row
->glyphs
[LAST_AREA
] - right
;
3070 /* Return the window in the window tree rooted in W containing frame
3071 row ROW. Value is null if none is found. */
3074 frame_row_to_window (w
, row
)
3078 struct window
*found
= NULL
;
3082 if (!NILP (w
->hchild
))
3083 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3084 else if (!NILP (w
->vchild
))
3085 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3086 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3087 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3090 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3097 /* Perform a line dance in the window tree rooted at W, after
3098 scrolling a frame matrix in mirrored_line_dance.
3100 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3101 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3102 COPY_FROM is a vector containing, for each row I in the range 0 <=
3103 I < NLINES, the index of the original line to move to I. This
3104 index is relative to the row range, i.e. 0 <= index < NLINES.
3105 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3109 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3111 int unchanged_at_top
, nlines
;
3117 if (!NILP (w
->hchild
))
3118 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3119 nlines
, copy_from
, retained_p
);
3120 else if (!NILP (w
->vchild
))
3121 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3122 nlines
, copy_from
, retained_p
);
3125 /* W is a leaf window, and we are working on its current
3127 struct glyph_matrix
*m
= w
->current_matrix
;
3129 struct glyph_row
*old_rows
;
3131 /* Make a copy of the original rows of matrix m. */
3132 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3133 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3135 for (i
= 0; i
< nlines
; ++i
)
3137 /* Frame relative line assigned to. */
3138 int frame_to
= i
+ unchanged_at_top
;
3140 /* Frame relative line assigned. */
3141 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3143 /* Window relative line assigned to. */
3144 int window_to
= frame_to
- m
->matrix_y
;
3146 /* Window relative line assigned. */
3147 int window_from
= frame_from
- m
->matrix_y
;
3149 /* Is assigned line inside window? */
3150 int from_inside_window_p
3151 = window_from
>= 0 && window_from
< m
->matrix_h
;
3153 /* Is assigned to line inside window? */
3154 int to_inside_window_p
3155 = window_to
>= 0 && window_to
< m
->matrix_h
;
3157 if (from_inside_window_p
&& to_inside_window_p
)
3159 /* Enabled setting before assignment. */
3160 int enabled_before_p
;
3162 /* Do the assignment. The enabled_p flag is saved
3163 over the assignment because the old redisplay did
3165 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3166 m
->rows
[window_to
] = old_rows
[window_from
];
3167 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3169 /* If frame line is empty, window line is empty, too. */
3170 if (!retained_p
[copy_from
[i
]])
3171 m
->rows
[window_to
].enabled_p
= 0;
3173 else if (to_inside_window_p
)
3175 /* A copy between windows. This is an infrequent
3176 case not worth optimizing. */
3177 struct frame
*f
= XFRAME (w
->frame
);
3178 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3180 struct glyph_matrix
*m2
;
3183 w2
= frame_row_to_window (root
, frame_from
);
3184 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3185 -nw', FROM_FRAME sometimes has no associated window.
3186 This check avoids a segfault if W2 is null. */
3189 m2
= w2
->current_matrix
;
3190 m2_from
= frame_from
- m2
->matrix_y
;
3191 copy_row_except_pointers (m
->rows
+ window_to
,
3192 m2
->rows
+ m2_from
);
3194 /* If frame line is empty, window line is empty, too. */
3195 if (!retained_p
[copy_from
[i
]])
3196 m
->rows
[window_to
].enabled_p
= 0;
3200 else if (from_inside_window_p
)
3204 /* If there was a copy between windows, make sure glyph
3205 pointers are in sync with the frame matrix. */
3207 sync_window_with_frame_matrix_rows (w
);
3209 /* Check that no pointers are lost. */
3213 /* Next window on same level. */
3214 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3221 /* Check that window and frame matrices agree about their
3222 understanding where glyphs of the rows are to find. For each
3223 window in the window tree rooted at W, check that rows in the
3224 matrices of leaf window agree with their frame matrices about
3228 check_window_matrix_pointers (w
)
3233 if (!NILP (w
->hchild
))
3234 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3235 else if (!NILP (w
->vchild
))
3236 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3239 struct frame
*f
= XFRAME (w
->frame
);
3240 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3241 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3244 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3249 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3250 a window and FRAME_MATRIX is the corresponding frame matrix. For
3251 each row in WINDOW_MATRIX check that it's a slice of the
3252 corresponding frame row. If it isn't, abort. */
3255 check_matrix_pointers (window_matrix
, frame_matrix
)
3256 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3258 /* Row number in WINDOW_MATRIX. */
3261 /* Row number corresponding to I in FRAME_MATRIX. */
3262 int j
= window_matrix
->matrix_y
;
3264 /* For all rows check that the row in the window matrix is a
3265 slice of the row in the frame matrix. If it isn't we didn't
3266 mirror an operation on the frame matrix correctly. */
3267 while (i
< window_matrix
->nrows
)
3269 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3270 frame_matrix
->rows
+ j
))
3276 #endif /* GLYPH_DEBUG != 0 */
3280 /**********************************************************************
3281 VPOS and HPOS translations
3282 **********************************************************************/
3286 /* Translate vertical position VPOS which is relative to window W to a
3287 vertical position relative to W's frame. */
3290 window_to_frame_vpos (w
, vpos
)
3294 struct frame
*f
= XFRAME (w
->frame
);
3296 xassert (!FRAME_WINDOW_P (f
));
3297 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3298 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3299 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3304 /* Translate horizontal position HPOS which is relative to window W to
3305 a horizontal position relative to W's frame. */
3308 window_to_frame_hpos (w
, hpos
)
3312 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3313 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3317 #endif /* GLYPH_DEBUG */
3321 /**********************************************************************
3323 **********************************************************************/
3325 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3326 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3332 CHECK_LIVE_FRAME (frame
);
3335 /* Ignore redraw requests, if frame has no glyphs yet.
3336 (Implementation note: It still has to be checked why we are
3337 called so early here). */
3338 if (!glyphs_initialized_initially_p
)
3342 if (FRAME_MSDOS_P (f
))
3343 set_terminal_modes ();
3345 clear_current_matrices (f
);
3348 windows_or_buffers_changed
++;
3349 /* Mark all windows as inaccurate, so that every window will have
3350 its redisplay done. */
3351 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3352 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3358 /* Redraw frame F. This is nothing more than a call to the Lisp
3359 function redraw-frame. */
3366 XSETFRAME (frame
, f
);
3367 Fredraw_frame (frame
);
3371 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3372 doc
: /* Clear and redisplay all visible frames. */)
3375 Lisp_Object tail
, frame
;
3377 FOR_EACH_FRAME (tail
, frame
)
3378 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3379 Fredraw_frame (frame
);
3385 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3386 visible frames marked as garbaged. */
3389 redraw_garbaged_frames ()
3391 Lisp_Object tail
, frame
;
3393 FOR_EACH_FRAME (tail
, frame
)
3394 if (FRAME_VISIBLE_P (XFRAME (frame
))
3395 && FRAME_GARBAGED_P (XFRAME (frame
)))
3396 Fredraw_frame (frame
);
3401 /***********************************************************************
3403 ***********************************************************************/
3405 /* Try to update display and current glyph matrix directly.
3407 This function is called after a character G has been inserted into
3408 current_buffer. It tries to update the current glyph matrix and
3409 perform appropriate screen output to reflect the insertion. If it
3410 succeeds, the global flag redisplay_performed_directly_p will be
3411 set to 1, and thereby prevent the more costly general redisplay
3412 from running (see redisplay_internal).
3414 This function is not called for `hairy' character insertions.
3415 In particular, it is not called when after or before change
3416 functions exist, like they are used by font-lock. See keyboard.c
3417 for details where this function is called. */
3420 direct_output_for_insert (g
)
3423 register struct frame
*f
= SELECTED_FRAME ();
3424 struct window
*w
= XWINDOW (selected_window
);
3426 struct glyph_row
*glyph_row
;
3427 struct glyph
*glyphs
, *glyph
, *end
;
3429 /* Non-null means that redisplay of W is based on window matrices. */
3430 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3431 /* Non-null means we are in overwrite mode. */
3432 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3434 struct text_pos pos
;
3435 int delta
, delta_bytes
;
3437 /* Not done directly. */
3438 redisplay_performed_directly_p
= 0;
3440 /* Quickly give up for some common cases. */
3441 if (cursor_in_echo_area
3442 /* Give up if fonts have changed. */
3444 /* Give up if face attributes have been changed. */
3445 || face_change_count
3446 /* Give up if cursor position not really known. */
3447 || !display_completed
3448 /* Give up if buffer appears in two places. */
3449 || buffer_shared
> 1
3450 /* Give up if currently displaying a message instead of the
3451 minibuffer contents. */
3452 || (EQ (selected_window
, minibuf_window
)
3453 && EQ (minibuf_window
, echo_area_window
))
3454 /* Give up for hscrolled mini-buffer because display of the prompt
3455 is handled specially there (see display_line). */
3456 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3457 /* Give up if overwriting in the middle of a line. */
3460 && FETCH_BYTE (PT
) != '\n')
3461 /* Give up for tabs and line ends. */
3465 /* Give up if unable to display the cursor in the window. */
3466 || w
->cursor
.vpos
< 0
3467 /* Give up if we are showing a message or just cleared the message
3468 because we might need to resize the echo area window. */
3469 || !NILP (echo_area_buffer
[0])
3470 || !NILP (echo_area_buffer
[1])
3471 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3472 /* Can't do it in a continued line because continuation
3473 lines would change. */
3474 (glyph_row
->continued_p
3475 || glyph_row
->exact_window_width_line_p
3476 /* Can't use this method if the line overlaps others or is
3477 overlapped by others because these other lines would
3478 have to be redisplayed. */
3479 || glyph_row
->overlapping_p
3480 || glyph_row
->overlapped_p
))
3481 /* Can't do it for partial width windows on terminal frames
3482 because we can't clear to eol in such a window. */
3483 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3486 /* If we can't insert glyphs, we can use this method only
3487 at the end of a line. */
3488 if (!char_ins_del_ok
)
3489 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3492 /* Set up a display iterator structure for W. Glyphs will be
3493 produced in scratch_glyph_row. Current position is W's cursor
3495 clear_glyph_row (&scratch_glyph_row
);
3496 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3497 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3498 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3501 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3502 if (glyph_row
->mouse_face_p
)
3505 /* Give up if highlighting trailing whitespace and we have trailing
3506 whitespace in glyph_row. We would have to remove the trailing
3507 whitespace face in that case. */
3508 if (!NILP (Vshow_trailing_whitespace
)
3509 && glyph_row
->used
[TEXT_AREA
])
3513 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3514 if (last
->type
== STRETCH_GLYPH
3515 || (last
->type
== CHAR_GLYPH
3516 && last
->u
.ch
== ' '))
3520 /* Give up if there are overlay strings at pos. This would fail
3521 if the overlay string has newlines in it. */
3522 if (STRINGP (it
.string
))
3525 it
.hpos
= w
->cursor
.hpos
;
3526 it
.vpos
= w
->cursor
.vpos
;
3527 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3528 it
.current_y
= w
->cursor
.y
;
3529 it
.end_charpos
= PT
;
3530 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3531 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3533 /* More than one display element may be returned for PT - 1 if
3534 (i) it's a control character which is translated into `\003' or
3535 `^C', or (ii) it has a display table entry, or (iii) it's a
3536 combination of both. */
3537 delta
= delta_bytes
= 0;
3538 while (get_next_display_element (&it
))
3540 PRODUCE_GLYPHS (&it
);
3542 /* Give up if glyph doesn't fit completely on the line. */
3543 if (it
.current_x
>= it
.last_visible_x
)
3546 /* Give up if new glyph has different ascent or descent than
3547 the original row, or if it is not a character glyph. */
3548 if (glyph_row
->ascent
!= it
.ascent
3549 || glyph_row
->height
!= it
.ascent
+ it
.descent
3550 || glyph_row
->phys_ascent
!= it
.phys_ascent
3551 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3552 || it
.what
!= IT_CHARACTER
)
3556 delta_bytes
+= it
.len
;
3557 set_iterator_to_next (&it
, 1);
3560 /* Give up if we hit the right edge of the window. We would have
3561 to insert truncation or continuation glyphs. */
3562 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3563 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3566 /* Give up if there is a \t following in the line. */
3568 it2
.end_charpos
= ZV
;
3569 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3570 while (get_next_display_element (&it2
)
3571 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3575 set_iterator_to_next (&it2
, 1);
3578 /* Number of new glyphs produced. */
3579 n
= it
.glyph_row
->used
[TEXT_AREA
];
3581 /* Start and end of glyphs in original row. */
3582 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3583 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3585 /* Make room for new glyphs, then insert them. */
3586 xassert (end
- glyphs
- n
>= 0);
3587 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3588 (end
- glyphs
- n
) * sizeof (*end
));
3589 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3590 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3591 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3593 /* Compute new line width. */
3594 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3595 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3596 glyph_row
->pixel_width
= glyph_row
->x
;
3599 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3603 /* Increment buffer positions for glyphs following the newly
3605 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3606 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3607 glyph
->charpos
+= delta
;
3609 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3611 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3612 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3615 /* Adjust positions in lines following the one we are in. */
3616 increment_matrix_positions (w
->current_matrix
,
3618 w
->current_matrix
->nrows
,
3619 delta
, delta_bytes
);
3621 glyph_row
->contains_overlapping_glyphs_p
3622 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3624 glyph_row
->displays_text_p
= 1;
3625 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3626 XFASTINT (w
->window_end_vpos
)));
3628 if (!NILP (Vshow_trailing_whitespace
))
3629 highlight_trailing_whitespace (it
.f
, glyph_row
);
3631 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3632 In the middle, we have to insert glyphs. Note that this is now
3633 implemented for X frames. The implementation uses updated_window
3635 updated_row
= glyph_row
;
3636 updated_area
= TEXT_AREA
;
3640 rif
->update_window_begin_hook (w
);
3642 if (glyphs
== end
- n
3643 /* In front of a space added by append_space. */
3644 || (glyphs
== end
- n
- 1
3645 && (end
- n
)->charpos
<= 0))
3646 rif
->write_glyphs (glyphs
, n
);
3648 rif
->insert_glyphs (glyphs
, n
);
3652 if (glyphs
== end
- n
)
3653 write_glyphs (glyphs
, n
);
3655 insert_glyphs (glyphs
, n
);
3658 w
->cursor
.hpos
+= n
;
3659 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3660 xassert (w
->cursor
.hpos
>= 0
3661 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3663 /* How to set the cursor differs depending on whether we are
3664 using a frame matrix or a window matrix. Note that when
3665 a frame matrix is used, cursor_to expects frame coordinates,
3666 and the X and Y parameters are not used. */
3667 if (window_redisplay_p
)
3668 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3669 w
->cursor
.y
, w
->cursor
.x
);
3673 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3674 + (INTEGERP (w
->left_margin_cols
)
3675 ? XFASTINT (w
->left_margin_cols
)
3677 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3681 #ifdef HAVE_WINDOW_SYSTEM
3682 update_window_fringes (w
, 0);
3686 rif
->update_window_end_hook (w
, 1, 0);
3691 TRACE ((stderr
, "direct output for insert\n"));
3692 mark_window_display_accurate (it
.window
, 1);
3693 redisplay_performed_directly_p
= 1;
3698 /* Perform a direct display update for moving PT by N positions
3699 left or right. N < 0 means a movement backwards. This function
3700 is currently only called for N == 1 or N == -1. */
3703 direct_output_forward_char (n
)
3706 struct frame
*f
= SELECTED_FRAME ();
3707 struct window
*w
= XWINDOW (selected_window
);
3708 struct glyph_row
*row
;
3710 /* Give up if point moved out of or into a composition. */
3711 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3712 current_buffer
, PT
))
3715 /* Give up if face attributes have been changed. */
3716 if (face_change_count
)
3719 /* Give up if current matrix is not up to date or we are
3720 displaying a message. */
3721 if (!display_completed
|| cursor_in_echo_area
)
3724 /* Give up if the buffer's direction is reversed. */
3725 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3728 /* Can't use direct output if highlighting a region. */
3729 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3732 /* Can't use direct output if highlighting trailing whitespace. */
3733 if (!NILP (Vshow_trailing_whitespace
))
3736 /* Give up if we are showing a message or just cleared the message
3737 because we might need to resize the echo area window. */
3738 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3741 /* Give up if currently displaying a message instead of the
3742 minibuffer contents. */
3743 if (XWINDOW (minibuf_window
) == w
3744 && EQ (minibuf_window
, echo_area_window
))
3747 /* Give up if we don't know where the cursor is. */
3748 if (w
->cursor
.vpos
< 0)
3751 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3753 /* Give up if PT is outside of the last known cursor row. */
3754 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3755 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3758 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3760 w
->last_cursor
= w
->cursor
;
3761 XSETFASTINT (w
->last_point
, PT
);
3763 xassert (w
->cursor
.hpos
>= 0
3764 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3766 if (FRAME_WINDOW_P (f
))
3767 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3768 w
->cursor
.y
, w
->cursor
.x
);
3772 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3773 + (INTEGERP (w
->left_margin_cols
)
3774 ? XFASTINT (w
->left_margin_cols
)
3776 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3781 redisplay_performed_directly_p
= 1;
3787 /***********************************************************************
3789 ***********************************************************************/
3791 /* Update frame F based on the data in desired matrices.
3793 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3794 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3797 Value is non-zero if redisplay was stopped due to pending input. */
3800 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3803 int inhibit_hairy_id_p
;
3805 /* 1 means display has been paused because of pending input. */
3807 struct window
*root_window
= XWINDOW (f
->root_window
);
3809 if (FRAME_WINDOW_P (f
))
3811 /* We are working on window matrix basis. All windows whose
3812 flag must_be_updated_p is set have to be updated. */
3814 /* Record that we are not working on frame matrices. */
3815 set_frame_matrix_frame (NULL
);
3817 /* Update all windows in the window tree of F, maybe stopping
3818 when pending input is detected. */
3821 /* Update the menu bar on X frames that don't have toolkit
3823 if (WINDOWP (f
->menu_bar_window
))
3824 update_window (XWINDOW (f
->menu_bar_window
), 1);
3826 /* Update the tool-bar window, if present. */
3827 if (WINDOWP (f
->tool_bar_window
))
3829 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3831 /* Update tool-bar window. */
3832 if (w
->must_be_updated_p
)
3836 update_window (w
, 1);
3837 w
->must_be_updated_p
= 0;
3839 /* Swap tool-bar strings. We swap because we want to
3841 tem
= f
->current_tool_bar_string
;
3842 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3843 f
->desired_tool_bar_string
= tem
;
3848 /* Update windows. */
3849 paused_p
= update_window_tree (root_window
, force_p
);
3852 /* This flush is a performance bottleneck under X,
3853 and it doesn't seem to be necessary anyway (in general).
3854 It is necessary when resizing the window with the mouse, or
3855 at least the fringes are not redrawn in a timely manner. ++kfs */
3856 if (f
->force_flush_display_p
)
3858 rif
->flush_display (f
);
3859 f
->force_flush_display_p
= 0;
3864 /* We are working on frame matrix basis. Set the frame on whose
3865 frame matrix we operate. */
3866 set_frame_matrix_frame (f
);
3868 /* Build F's desired matrix from window matrices. */
3869 build_frame_matrix (f
);
3871 /* Update the display */
3873 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3877 fflush (termscript
);
3880 /* Check window matrices for lost pointers. */
3882 check_window_matrix_pointers (root_window
);
3883 add_frame_display_history (f
, paused_p
);
3887 /* Reset flags indicating that a window should be updated. */
3888 set_window_update_flags (root_window
, 0);
3890 display_completed
= !paused_p
;
3896 /************************************************************************
3897 Window-based updates
3898 ************************************************************************/
3900 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3901 don't stop updating when input is pending. */
3904 update_window_tree (w
, force_p
)
3910 while (w
&& !paused_p
)
3912 if (!NILP (w
->hchild
))
3913 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3914 else if (!NILP (w
->vchild
))
3915 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3916 else if (w
->must_be_updated_p
)
3917 paused_p
|= update_window (w
, force_p
);
3919 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3926 /* Update window W if its flag must_be_updated_p is non-zero. If
3927 FORCE_P is non-zero, don't stop updating if input is pending. */
3930 update_single_window (w
, force_p
)
3934 if (w
->must_be_updated_p
)
3936 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3938 /* Record that this is not a frame-based redisplay. */
3939 set_frame_matrix_frame (NULL
);
3943 update_window (w
, force_p
);
3946 /* Reset flag in W. */
3947 w
->must_be_updated_p
= 0;
3951 #ifdef HAVE_WINDOW_SYSTEM
3953 /* Redraw lines from the current matrix of window W that are
3954 overlapped by other rows. YB is bottom-most y-position in W. */
3957 redraw_overlapped_rows (w
, yb
)
3963 /* If rows overlapping others have been changed, the rows being
3964 overlapped have to be redrawn. This won't draw lines that have
3965 already been drawn in update_window_line because overlapped_p in
3966 desired rows is 0, so after row assignment overlapped_p in
3967 current rows is 0. */
3968 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3970 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3972 if (!row
->enabled_p
)
3974 else if (row
->mode_line_p
)
3977 if (row
->overlapped_p
)
3979 enum glyph_row_area area
;
3981 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3984 updated_area
= area
;
3985 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3986 if (row
->used
[area
])
3987 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3988 rif
->clear_end_of_line (-1);
3991 row
->overlapped_p
= 0;
3994 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4000 /* Redraw lines from the current matrix of window W that overlap
4001 others. YB is bottom-most y-position in W. */
4004 redraw_overlapping_rows (w
, yb
)
4009 struct glyph_row
*row
;
4011 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4013 row
= w
->current_matrix
->rows
+ i
;
4015 if (!row
->enabled_p
)
4017 else if (row
->mode_line_p
)
4020 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4022 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4026 if (MATRIX_ROW_OVERLAPS_PRED_P (row
)
4027 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4028 overlaps
|= OVERLAPS_PRED
;
4029 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
4030 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4031 overlaps
|= OVERLAPS_SUCC
;
4035 if (row
->used
[LEFT_MARGIN_AREA
])
4036 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4038 if (row
->used
[TEXT_AREA
])
4039 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4041 if (row
->used
[RIGHT_MARGIN_AREA
])
4042 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4044 /* Record in neighbour rows that ROW overwrites part of
4046 if (overlaps
& OVERLAPS_PRED
)
4047 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4048 if (overlaps
& OVERLAPS_SUCC
)
4049 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4058 #endif /* HAVE_WINDOW_SYSTEM */
4063 /* Check that no row in the current matrix of window W is enabled
4064 which is below what's displayed in the window. */
4067 check_current_matrix_flags (w
)
4070 int last_seen_p
= 0;
4071 int i
, yb
= window_text_bottom_y (w
);
4073 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4075 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4076 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4078 else if (last_seen_p
&& row
->enabled_p
)
4083 #endif /* GLYPH_DEBUG */
4086 /* Update display of window W. FORCE_P non-zero means that we should
4087 not stop when detecting pending input. */
4090 update_window (w
, force_p
)
4094 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4096 int preempt_count
= baud_rate
/ 2400 + 1;
4097 extern int input_pending
;
4098 extern Lisp_Object do_mouse_tracking
;
4100 /* Check that W's frame doesn't have glyph matrices. */
4101 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4102 xassert (updating_frame
!= NULL
);
4105 /* Check pending input the first time so that we can quickly return. */
4106 if (redisplay_dont_pause
)
4109 detect_input_pending_ignore_squeezables ();
4111 /* If forced to complete the update, or if no input is pending, do
4113 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4115 struct glyph_row
*row
, *end
;
4116 struct glyph_row
*mode_line_row
;
4117 struct glyph_row
*header_line_row
;
4118 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4120 rif
->update_window_begin_hook (w
);
4121 yb
= window_text_bottom_y (w
);
4123 /* If window has a header line, update it before everything else.
4124 Adjust y-positions of other rows by the header line height. */
4125 row
= desired_matrix
->rows
;
4126 end
= row
+ desired_matrix
->nrows
- 1;
4128 if (row
->mode_line_p
)
4130 header_line_row
= row
;
4134 header_line_row
= NULL
;
4136 /* Update the mode line, if necessary. */
4137 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4138 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4140 mode_line_row
->y
= yb
;
4141 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4143 &mouse_face_overwritten_p
);
4146 /* Find first enabled row. Optimizations in redisplay_internal
4147 may lead to an update with only one row enabled. There may
4148 be also completely empty matrices. */
4149 while (row
< end
&& !row
->enabled_p
)
4152 /* Try reusing part of the display by copying. */
4153 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4155 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4158 /* All rows were found to be equal. */
4164 /* We've scrolled the display. */
4170 /* Update the rest of the lines. */
4171 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4174 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4177 /* We'll have to play a little bit with when to
4178 detect_input_pending. If it's done too often,
4179 scrolling large windows with repeated scroll-up
4180 commands will too quickly pause redisplay. */
4181 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4182 detect_input_pending_ignore_squeezables ();
4184 changed_p
|= update_window_line (w
, vpos
,
4185 &mouse_face_overwritten_p
);
4187 /* Mark all rows below the last visible one in the current
4188 matrix as invalid. This is necessary because of
4189 variable line heights. Consider the case of three
4190 successive redisplays, where the first displays 5
4191 lines, the second 3 lines, and the third 5 lines again.
4192 If the second redisplay wouldn't mark rows in the
4193 current matrix invalid, the third redisplay might be
4194 tempted to optimize redisplay based on lines displayed
4195 in the first redisplay. */
4196 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4197 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4198 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4201 /* Was display preempted? */
4202 paused_p
= row
< end
;
4206 /* Update the header line after scrolling because a new header
4207 line would otherwise overwrite lines at the top of the window
4208 that can be scrolled. */
4209 if (header_line_row
&& header_line_row
->enabled_p
)
4211 header_line_row
->y
= 0;
4212 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4215 /* Fix the appearance of overlapping/overlapped rows. */
4216 if (!paused_p
&& !w
->pseudo_window_p
)
4218 #ifdef HAVE_WINDOW_SYSTEM
4219 if (changed_p
&& rif
->fix_overlapping_area
)
4221 redraw_overlapped_rows (w
, yb
);
4222 redraw_overlapping_rows (w
, yb
);
4226 /* Make cursor visible at cursor position of W. */
4227 set_window_cursor_after_update (w
);
4229 #if 0 /* Check that current matrix invariants are satisfied. This is
4230 for debugging only. See the comment of check_matrix_invariants. */
4231 IF_DEBUG (check_matrix_invariants (w
));
4236 /* Remember the redisplay method used to display the matrix. */
4237 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4240 #ifdef HAVE_WINDOW_SYSTEM
4241 update_window_fringes (w
, 0);
4244 /* End the update of window W. Don't set the cursor if we
4245 paused updating the display because in this case,
4246 set_window_cursor_after_update hasn't been called, and
4247 output_cursor doesn't contain the cursor location. */
4248 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4254 /* check_current_matrix_flags (w); */
4255 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4258 clear_glyph_matrix (desired_matrix
);
4264 /* Update the display of area AREA in window W, row number VPOS.
4265 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4268 update_marginal_area (w
, area
, vpos
)
4272 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4274 /* Let functions in xterm.c know what area subsequent X positions
4275 will be relative to. */
4276 updated_area
= area
;
4278 /* Set cursor to start of glyphs, write them, and clear to the end
4279 of the area. I don't think that something more sophisticated is
4280 necessary here, since marginal areas will not be the default. */
4281 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4282 if (desired_row
->used
[area
])
4283 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4284 rif
->clear_end_of_line (-1);
4288 /* Update the display of the text area of row VPOS in window W.
4289 Value is non-zero if display has changed. */
4292 update_text_area (w
, vpos
)
4296 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4297 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4300 /* Let functions in xterm.c know what area subsequent X positions
4301 will be relative to. */
4302 updated_area
= TEXT_AREA
;
4304 /* If rows are at different X or Y, or rows have different height,
4305 or the current row is marked invalid, write the entire line. */
4306 if (!current_row
->enabled_p
4307 || desired_row
->y
!= current_row
->y
4308 || desired_row
->ascent
!= current_row
->ascent
4309 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4310 || desired_row
->phys_height
!= current_row
->phys_height
4311 || desired_row
->visible_height
!= current_row
->visible_height
4312 || current_row
->overlapped_p
4313 || current_row
->mouse_face_p
4314 || current_row
->x
!= desired_row
->x
)
4316 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4318 if (desired_row
->used
[TEXT_AREA
])
4319 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4320 desired_row
->used
[TEXT_AREA
]);
4322 /* Clear to end of window. */
4323 rif
->clear_end_of_line (-1);
4326 /* This erases the cursor. We do this here because
4327 notice_overwritten_cursor cannot easily check this, which
4328 might indicate that the whole functionality of
4329 notice_overwritten_cursor would better be implemented here.
4330 On the other hand, we need notice_overwritten_cursor as long
4331 as mouse highlighting is done asynchronously outside of
4333 if (vpos
== w
->phys_cursor
.vpos
)
4334 w
->phys_cursor_on_p
= 0;
4339 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4340 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4341 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4342 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4344 /* If the desired row extends its face to the text area end, and
4345 unless the current row also does so at the same position,
4346 make sure we write at least one glyph, so that the face
4347 extension actually takes place. */
4348 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4349 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4350 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4351 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4354 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4358 /* Loop over glyphs that current and desired row may have
4364 /* Skip over glyphs that both rows have in common. These
4365 don't have to be written. We can't skip if the last
4366 current glyph overlaps the glyph to its right. For
4367 example, consider a current row of `if ' with the `f' in
4368 Courier bold so that it overlaps the ` ' to its right.
4369 If the desired row is ` ', we would skip over the space
4370 after the `if' and there would remain a pixel from the
4371 `f' on the screen. */
4372 if (overlapping_glyphs_p
&& i
> 0)
4374 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4377 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4379 can_skip_p
= right
== 0;
4385 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4387 x
+= desired_glyph
->pixel_width
;
4388 ++desired_glyph
, ++current_glyph
, ++i
;
4391 /* Consider the case that the current row contains "xxx
4392 ppp ggg" in italic Courier font, and the desired row
4393 is "xxx ggg". The character `p' has lbearing, `g'
4394 has not. The loop above will stop in front of the
4395 first `p' in the current row. If we would start
4396 writing glyphs there, we wouldn't erase the lbearing
4397 of the `p'. The rest of the lbearing problem is then
4398 taken care of by draw_glyphs. */
4399 if (overlapping_glyphs_p
4401 && i
< current_row
->used
[TEXT_AREA
]
4402 && (current_row
->used
[TEXT_AREA
]
4403 != desired_row
->used
[TEXT_AREA
]))
4407 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4409 while (left
> 0 && i
> 0)
4411 --i
, --desired_glyph
, --current_glyph
;
4412 x
-= desired_glyph
->pixel_width
;
4413 left
-= desired_glyph
->pixel_width
;
4418 /* Try to avoid writing the entire rest of the desired row
4419 by looking for a resync point. This mainly prevents
4420 mode line flickering in the case the mode line is in
4421 fixed-pitch font, which it usually will be. */
4422 if (i
< desired_row
->used
[TEXT_AREA
])
4424 int start_x
= x
, start_hpos
= i
;
4425 struct glyph
*start
= desired_glyph
;
4427 int skip_first_p
= !can_skip_p
;
4429 /* Find the next glyph that's equal again. */
4432 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4435 x
+= desired_glyph
->pixel_width
;
4436 current_x
+= current_glyph
->pixel_width
;
4437 ++desired_glyph
, ++current_glyph
, ++i
;
4441 if (i
== start_hpos
|| x
!= current_x
)
4445 desired_glyph
= start
;
4449 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4450 rif
->write_glyphs (start
, i
- start_hpos
);
4455 /* Write the rest. */
4456 if (i
< desired_row
->used
[TEXT_AREA
])
4458 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4459 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4463 /* Maybe clear to end of line. */
4464 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4466 /* If new row extends to the end of the text area, nothing
4467 has to be cleared, if and only if we did a write_glyphs
4468 above. This is made sure by setting desired_stop_pos
4469 appropriately above. */
4470 xassert (i
< desired_row
->used
[TEXT_AREA
]
4471 || ((desired_row
->used
[TEXT_AREA
]
4472 == current_row
->used
[TEXT_AREA
])
4473 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4475 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4477 /* If old row extends to the end of the text area, clear. */
4478 if (i
>= desired_row
->used
[TEXT_AREA
])
4479 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4480 desired_row
->pixel_width
);
4481 rif
->clear_end_of_line (-1);
4484 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4486 /* Otherwise clear to the end of the old row. Everything
4487 after that position should be clear already. */
4490 if (i
>= desired_row
->used
[TEXT_AREA
])
4491 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4492 desired_row
->pixel_width
);
4494 /* If cursor is displayed at the end of the line, make sure
4495 it's cleared. Nowadays we don't have a phys_cursor_glyph
4496 with which to erase the cursor (because this method
4497 doesn't work with lbearing/rbearing), so we must do it
4499 if (vpos
== w
->phys_cursor
.vpos
4500 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4502 w
->phys_cursor_on_p
= 0;
4506 x
= current_row
->pixel_width
;
4507 rif
->clear_end_of_line (x
);
4516 /* Update row VPOS in window W. Value is non-zero if display has been
4520 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4522 int vpos
, *mouse_face_overwritten_p
;
4524 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4525 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4528 /* Set the row being updated. This is important to let xterm.c
4529 know what line height values are in effect. */
4530 updated_row
= desired_row
;
4532 /* A row can be completely invisible in case a desired matrix was
4533 built with a vscroll and then make_cursor_line_fully_visible shifts
4534 the matrix. Make sure to make such rows current anyway, since
4535 we need the correct y-position, for example, in the current matrix. */
4536 if (desired_row
->mode_line_p
4537 || desired_row
->visible_height
> 0)
4539 xassert (desired_row
->enabled_p
);
4541 /* Update display of the left margin area, if there is one. */
4542 if (!desired_row
->full_width_p
4543 && !NILP (w
->left_margin_cols
))
4546 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4549 /* Update the display of the text area. */
4550 if (update_text_area (w
, vpos
))
4553 if (current_row
->mouse_face_p
)
4554 *mouse_face_overwritten_p
= 1;
4557 /* Update display of the right margin area, if there is one. */
4558 if (!desired_row
->full_width_p
4559 && !NILP (w
->right_margin_cols
))
4562 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4565 /* Draw truncation marks etc. */
4566 if (!current_row
->enabled_p
4567 || desired_row
->y
!= current_row
->y
4568 || desired_row
->visible_height
!= current_row
->visible_height
4569 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4570 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4571 || current_row
->redraw_fringe_bitmaps_p
4572 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4573 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4574 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4575 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4576 rif
->after_update_window_line_hook (desired_row
);
4579 /* Update current_row from desired_row. */
4580 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4586 /* Set the cursor after an update of window W. This function may only
4587 be called from update_window. */
4590 set_window_cursor_after_update (w
)
4593 struct frame
*f
= XFRAME (w
->frame
);
4594 int cx
, cy
, vpos
, hpos
;
4596 /* Not intended for frame matrix updates. */
4597 xassert (FRAME_WINDOW_P (f
));
4599 if (cursor_in_echo_area
4600 && !NILP (echo_area_buffer
[0])
4601 /* If we are showing a message instead of the mini-buffer,
4602 show the cursor for the message instead. */
4603 && XWINDOW (minibuf_window
) == w
4604 && EQ (minibuf_window
, echo_area_window
)
4605 /* These cases apply only to the frame that contains
4606 the active mini-buffer window. */
4607 && FRAME_HAS_MINIBUF_P (f
)
4608 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4610 cx
= cy
= vpos
= hpos
= 0;
4612 if (cursor_in_echo_area
>= 0)
4614 /* If the mini-buffer is several lines high, find the last
4615 line that has any text on it. Note: either all lines
4616 are enabled or none. Otherwise we wouldn't be able to
4618 struct glyph_row
*row
, *last_row
;
4619 struct glyph
*glyph
;
4620 int yb
= window_text_bottom_y (w
);
4623 row
= w
->current_matrix
->rows
;
4624 while (row
->enabled_p
4625 && (last_row
== NULL
4626 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4628 if (row
->used
[TEXT_AREA
]
4629 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4636 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4637 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4639 while (last
> start
&& last
->charpos
< 0)
4642 for (glyph
= start
; glyph
< last
; ++glyph
)
4644 cx
+= glyph
->pixel_width
;
4649 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4657 hpos
= w
->cursor
.hpos
;
4658 vpos
= w
->cursor
.vpos
;
4661 /* Window cursor can be out of sync for horizontally split windows. */
4662 hpos
= max (0, hpos
);
4663 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4664 vpos
= max (0, vpos
);
4665 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4666 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4670 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4671 tree rooted at W. */
4674 set_window_update_flags (w
, on_p
)
4680 if (!NILP (w
->hchild
))
4681 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4682 else if (!NILP (w
->vchild
))
4683 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4685 w
->must_be_updated_p
= on_p
;
4687 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4693 /***********************************************************************
4694 Window-Based Scrolling
4695 ***********************************************************************/
4697 /* Structure describing rows in scrolling_window. */
4701 /* Number of occurrences of this row in desired and current matrix. */
4702 int old_uses
, new_uses
;
4704 /* Vpos of row in new matrix. */
4705 int new_line_number
;
4707 /* Bucket index of this row_entry in the hash table row_table. */
4710 /* The row described by this entry. */
4711 struct glyph_row
*row
;
4713 /* Hash collision chain. */
4714 struct row_entry
*next
;
4717 /* A pool to allocate row_entry structures from, and the size of the
4718 pool. The pool is reallocated in scrolling_window when we find
4719 that we need a larger one. */
4721 static struct row_entry
*row_entry_pool
;
4722 static int row_entry_pool_size
;
4724 /* Index of next free entry in row_entry_pool. */
4726 static int row_entry_idx
;
4728 /* The hash table used during scrolling, and the table's size. This
4729 table is used to quickly identify equal rows in the desired and
4732 static struct row_entry
**row_table
;
4733 static int row_table_size
;
4735 /* Vectors of pointers to row_entry structures belonging to the
4736 current and desired matrix, and the size of the vectors. */
4738 static struct row_entry
**old_lines
, **new_lines
;
4739 static int old_lines_size
, new_lines_size
;
4741 /* A pool to allocate run structures from, and its size. */
4743 static struct run
*run_pool
;
4744 static int runs_size
;
4746 /* A vector of runs of lines found during scrolling. */
4748 static struct run
**runs
;
4750 /* Add glyph row ROW to the scrolling hash table during the scrolling
4753 static INLINE
struct row_entry
*
4754 add_row_entry (w
, row
)
4756 struct glyph_row
*row
;
4758 struct row_entry
*entry
;
4759 int i
= row
->hash
% row_table_size
;
4761 entry
= row_table
[i
];
4762 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4763 entry
= entry
->next
;
4767 entry
= row_entry_pool
+ row_entry_idx
++;
4769 entry
->old_uses
= entry
->new_uses
= 0;
4770 entry
->new_line_number
= 0;
4772 entry
->next
= row_table
[i
];
4773 row_table
[i
] = entry
;
4780 /* Try to reuse part of the current display of W by scrolling lines.
4781 HEADER_LINE_P non-zero means W has a header line.
4783 The algorithm is taken from Communications of the ACM, Apr78 "A
4784 Technique for Isolating Differences Between Files." It should take
4787 A short outline of the steps of the algorithm
4789 1. Skip lines equal at the start and end of both matrices.
4791 2. Enter rows in the current and desired matrix into a symbol
4792 table, counting how often they appear in both matrices.
4794 3. Rows that appear exactly once in both matrices serve as anchors,
4795 i.e. we assume that such lines are likely to have been moved.
4797 4. Starting from anchor lines, extend regions to be scrolled both
4798 forward and backward.
4802 -1 if all rows were found to be equal.
4803 0 to indicate that we did not scroll the display, or
4804 1 if we did scroll. */
4807 scrolling_window (w
, header_line_p
)
4811 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4812 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4813 int yb
= window_text_bottom_y (w
);
4814 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4815 int nruns
, nbytes
, n
, run_idx
;
4816 struct row_entry
*entry
;
4818 /* Skip over rows equal at the start. */
4819 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4821 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4822 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4826 && !d
->redraw_fringe_bitmaps_p
4828 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4829 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4830 && row_equal_p (w
, c
, d
, 1))
4839 /* Give up if some rows in the desired matrix are not enabled. */
4840 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4843 first_old
= first_new
= i
;
4845 /* Set last_new to the index + 1 of the last enabled row in the
4848 while (i
< desired_matrix
->nrows
- 1
4849 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4850 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4853 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4858 /* Set last_old to the index + 1 of the last enabled row in the
4859 current matrix. We don't look at the enabled flag here because
4860 we plan to reuse part of the display even if other parts are
4863 while (i
< current_matrix
->nrows
- 1)
4865 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4874 /* Skip over rows equal at the bottom. */
4877 while (i
- 1 > first_new
4878 && j
- 1 > first_old
4879 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4880 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4881 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4882 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4884 MATRIX_ROW (desired_matrix
, i
- 1),
4885 MATRIX_ROW (current_matrix
, j
- 1), 1))
4890 /* Nothing to do if all rows are equal. */
4891 if (last_new
== first_new
)
4894 /* Reallocate vectors, tables etc. if necessary. */
4896 if (current_matrix
->nrows
> old_lines_size
)
4898 old_lines_size
= current_matrix
->nrows
;
4899 nbytes
= old_lines_size
* sizeof *old_lines
;
4900 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4903 if (desired_matrix
->nrows
> new_lines_size
)
4905 new_lines_size
= desired_matrix
->nrows
;
4906 nbytes
= new_lines_size
* sizeof *new_lines
;
4907 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4910 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4911 if (3 * n
> row_table_size
)
4913 row_table_size
= next_almost_prime (3 * n
);
4914 nbytes
= row_table_size
* sizeof *row_table
;
4915 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4916 bzero (row_table
, nbytes
);
4919 if (n
> row_entry_pool_size
)
4921 row_entry_pool_size
= n
;
4922 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4923 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4926 if (desired_matrix
->nrows
> runs_size
)
4928 runs_size
= desired_matrix
->nrows
;
4929 nbytes
= runs_size
* sizeof *runs
;
4930 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4931 nbytes
= runs_size
* sizeof *run_pool
;
4932 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4935 nruns
= run_idx
= 0;
4938 /* Add rows from the current and desired matrix to the hash table
4939 row_hash_table to be able to find equal ones quickly. */
4941 for (i
= first_old
; i
< last_old
; ++i
)
4943 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4945 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4946 old_lines
[i
] = entry
;
4950 old_lines
[i
] = NULL
;
4953 for (i
= first_new
; i
< last_new
; ++i
)
4955 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4956 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4958 entry
->new_line_number
= i
;
4959 new_lines
[i
] = entry
;
4962 /* Identify moves based on lines that are unique and equal
4963 in both matrices. */
4964 for (i
= first_old
; i
< last_old
;)
4966 && old_lines
[i
]->old_uses
== 1
4967 && old_lines
[i
]->new_uses
== 1)
4970 int new_line
= old_lines
[i
]->new_line_number
;
4971 struct run
*run
= run_pool
+ run_idx
++;
4974 run
->current_vpos
= i
;
4975 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4976 run
->desired_vpos
= new_line
;
4977 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4979 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4981 /* Extend backward. */
4984 while (j
> first_old
4986 && old_lines
[j
] == new_lines
[k
])
4988 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4989 --run
->current_vpos
;
4990 --run
->desired_vpos
;
4993 run
->desired_y
-= h
;
4994 run
->current_y
-= h
;
4998 /* Extend forward. */
5003 && old_lines
[j
] == new_lines
[k
])
5005 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5011 /* Insert run into list of all runs. Order runs by copied
5012 pixel lines. Note that we record runs that don't have to
5013 be copied because they are already in place. This is done
5014 because we can avoid calling update_window_line in this
5016 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5018 for (k
= nruns
; k
> j
; --k
)
5019 runs
[k
] = runs
[k
- 1];
5028 /* Do the moves. Do it in a way that we don't overwrite something
5029 we want to copy later on. This is not solvable in general
5030 because there is only one display and we don't have a way to
5031 exchange areas on this display. Example:
5033 +-----------+ +-----------+
5035 +-----------+ --> +-----------+
5037 +-----------+ +-----------+
5039 Instead, prefer bigger moves, and invalidate moves that would
5040 copy from where we copied to. */
5042 for (i
= 0; i
< nruns
; ++i
)
5043 if (runs
[i
]->nrows
> 0)
5045 struct run
*r
= runs
[i
];
5047 /* Copy on the display. */
5048 if (r
->current_y
!= r
->desired_y
)
5050 rif
->scroll_run_hook (w
, r
);
5052 /* Invalidate runs that copy from where we copied to. */
5053 for (j
= i
+ 1; j
< nruns
; ++j
)
5055 struct run
*p
= runs
[j
];
5057 if ((p
->current_y
>= r
->desired_y
5058 && p
->current_y
< r
->desired_y
+ r
->height
)
5059 || (p
->current_y
+ p
->height
>= r
->desired_y
5060 && (p
->current_y
+ p
->height
5061 < r
->desired_y
+ r
->height
)))
5066 /* Assign matrix rows. */
5067 for (j
= 0; j
< r
->nrows
; ++j
)
5069 struct glyph_row
*from
, *to
;
5070 int to_overlapped_p
;
5072 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5073 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5074 to_overlapped_p
= to
->overlapped_p
;
5075 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5076 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5077 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5078 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5079 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5080 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5081 from
->redraw_fringe_bitmaps_p
= 1;
5082 assign_row (to
, from
);
5083 to
->enabled_p
= 1, from
->enabled_p
= 0;
5084 to
->overlapped_p
= to_overlapped_p
;
5088 /* Clear the hash table, for the next time. */
5089 for (i
= 0; i
< row_entry_idx
; ++i
)
5090 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5092 /* Value is > 0 to indicate that we scrolled the display. */
5098 /************************************************************************
5100 ************************************************************************/
5102 /* Update the desired frame matrix of frame F.
5104 FORCE_P non-zero means that the update should not be stopped by
5105 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5106 should not be tried.
5108 Value is non-zero if update was stopped due to pending input. */
5111 update_frame_1 (f
, force_p
, inhibit_id_p
)
5116 /* Frame matrices to work on. */
5117 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5118 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5121 int preempt_count
= baud_rate
/ 2400 + 1;
5122 extern int input_pending
;
5124 xassert (current_matrix
&& desired_matrix
);
5126 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5127 calculate_costs (f
);
5129 if (preempt_count
<= 0)
5132 if (redisplay_dont_pause
)
5134 else if (!force_p
&& detect_input_pending_ignore_squeezables ())
5140 /* If we cannot insert/delete lines, it's no use trying it. */
5141 if (!line_ins_del_ok
)
5144 /* See if any of the desired lines are enabled; don't compute for
5145 i/d line if just want cursor motion. */
5146 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5147 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5150 /* Try doing i/d line, if not yet inhibited. */
5151 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5152 force_p
|= scrolling (f
);
5154 /* Update the individual lines as needed. Do bottom line first. */
5155 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5156 update_frame_line (f
, desired_matrix
->nrows
- 1);
5158 /* Now update the rest of the lines. */
5159 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5161 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5163 if (FRAME_TERMCAP_P (f
))
5165 /* Flush out every so many lines.
5166 Also flush out if likely to have more than 1k buffered
5167 otherwise. I'm told that some telnet connections get
5168 really screwed by more than 1k output at once. */
5169 int outq
= PENDING_OUTPUT_COUNT (stdout
);
5171 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5174 if (preempt_count
== 1)
5176 #ifdef EMACS_OUTQSIZE
5177 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5178 /* Probably not a tty. Ignore the error and reset
5180 outq
= PENDING_OUTPUT_COUNT (stdout
);
5183 if (baud_rate
<= outq
&& baud_rate
> 0)
5184 sleep (outq
/ baud_rate
);
5189 if ((i
- 1) % preempt_count
== 0)
5190 detect_input_pending_ignore_squeezables ();
5192 update_frame_line (f
, i
);
5196 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5198 /* Now just clean up termcap drivers and set cursor, etc. */
5201 if ((cursor_in_echo_area
5202 /* If we are showing a message instead of the mini-buffer,
5203 show the cursor for the message instead of for the
5204 (now hidden) mini-buffer contents. */
5205 || (EQ (minibuf_window
, selected_window
)
5206 && EQ (minibuf_window
, echo_area_window
)
5207 && !NILP (echo_area_buffer
[0])))
5208 /* These cases apply only to the frame that contains
5209 the active mini-buffer window. */
5210 && FRAME_HAS_MINIBUF_P (f
)
5211 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5213 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5216 if (cursor_in_echo_area
< 0)
5218 /* Negative value of cursor_in_echo_area means put
5219 cursor at beginning of line. */
5225 /* Positive value of cursor_in_echo_area means put
5226 cursor at the end of the prompt. If the mini-buffer
5227 is several lines high, find the last line that has
5229 row
= FRAME_LINES (f
);
5235 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5237 /* Frame rows are filled up with spaces that
5238 must be ignored here. */
5239 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5241 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5242 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5245 && (last
- 1)->charpos
< 0)
5251 while (row
> top
&& col
== 0);
5253 /* Make sure COL is not out of range. */
5254 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5256 /* If we have another row, advance cursor into it. */
5257 if (row
< FRAME_LINES (f
) - 1)
5259 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5262 /* Otherwise move it back in range. */
5264 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5268 cursor_to (row
, col
);
5272 /* We have only one cursor on terminal frames. Use it to
5273 display the cursor of the selected window. */
5274 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5275 if (w
->cursor
.vpos
>= 0
5276 /* The cursor vpos may be temporarily out of bounds
5277 in the following situation: There is one window,
5278 with the cursor in the lower half of it. The window
5279 is split, and a message causes a redisplay before
5280 a new cursor position has been computed. */
5281 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5283 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5284 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5286 if (INTEGERP (w
->left_margin_cols
))
5287 x
+= XFASTINT (w
->left_margin_cols
);
5289 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5297 clear_desired_matrices (f
);
5302 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5306 struct frame
*frame
;
5308 int unchanged_at_top
, unchanged_at_bottom
;
5311 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5312 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5313 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5314 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5316 int free_at_end_vpos
= FRAME_LINES (frame
);
5317 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5318 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5320 if (!current_matrix
)
5323 /* Compute hash codes of all the lines. Also calculate number of
5324 changed lines, number of unchanged lines at the beginning, and
5325 number of unchanged lines at the end. */
5327 unchanged_at_top
= 0;
5328 unchanged_at_bottom
= FRAME_LINES (frame
);
5329 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5331 /* Give up on this scrolling if some old lines are not enabled. */
5332 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5334 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5335 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5337 /* This line cannot be redrawn, so don't let scrolling mess it. */
5338 new_hash
[i
] = old_hash
[i
];
5339 #define INFINITY 1000000 /* Taken from scroll.c */
5340 draw_cost
[i
] = INFINITY
;
5344 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5345 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5348 if (old_hash
[i
] != new_hash
[i
])
5351 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5353 else if (i
== unchanged_at_top
)
5355 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5358 /* If changed lines are few, don't allow preemption, don't scroll. */
5359 if ((!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400)
5360 || unchanged_at_bottom
== FRAME_LINES (frame
))
5363 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5364 - unchanged_at_bottom
);
5366 if (scroll_region_ok
)
5367 free_at_end_vpos
-= unchanged_at_bottom
;
5368 else if (memory_below_frame
)
5369 free_at_end_vpos
= -1;
5371 /* If large window, fast terminal and few lines in common between
5372 current frame and desired frame, don't bother with i/d calc. */
5373 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
5375 10 * scrolling_max_lines_saved (unchanged_at_top
,
5376 FRAME_LINES (frame
) - unchanged_at_bottom
,
5377 old_hash
, new_hash
, draw_cost
)))
5380 if (window_size
< 2)
5383 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5384 draw_cost
+ unchanged_at_top
- 1,
5385 old_draw_cost
+ unchanged_at_top
- 1,
5386 old_hash
+ unchanged_at_top
- 1,
5387 new_hash
+ unchanged_at_top
- 1,
5388 free_at_end_vpos
- unchanged_at_top
);
5394 /* Count the number of blanks at the start of the vector of glyphs R
5395 which is LEN glyphs long. */
5398 count_blanks (r
, len
)
5404 for (i
= 0; i
< len
; ++i
)
5405 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5412 /* Count the number of glyphs in common at the start of the glyph
5413 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5414 of STR2. Value is the number of equal glyphs equal at the start. */
5417 count_match (str1
, end1
, str2
, end2
)
5418 struct glyph
*str1
, *end1
, *str2
, *end2
;
5420 struct glyph
*p1
= str1
;
5421 struct glyph
*p2
= str2
;
5425 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5432 /* Char insertion/deletion cost vector, from term.c */
5434 extern int *char_ins_del_vector
;
5435 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5438 /* Perform a frame-based update on line VPOS in frame FRAME. */
5441 update_frame_line (f
, vpos
)
5445 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5447 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5448 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5449 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5450 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5451 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5452 int must_write_whole_line_p
;
5453 int write_spaces_p
= must_write_spaces
;
5454 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5455 != FACE_TTY_DEFAULT_BG_COLOR
);
5457 if (colored_spaces_p
)
5460 /* Current row not enabled means it has unknown contents. We must
5461 write the whole desired line in that case. */
5462 must_write_whole_line_p
= !current_row
->enabled_p
;
5463 if (must_write_whole_line_p
)
5470 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5471 olen
= current_row
->used
[TEXT_AREA
];
5473 /* Ignore trailing spaces, if we can. */
5474 if (!write_spaces_p
)
5475 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5479 current_row
->enabled_p
= 1;
5480 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5482 /* If desired line is empty, just clear the line. */
5483 if (!desired_row
->enabled_p
)
5489 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5490 nlen
= desired_row
->used
[TEXT_AREA
];
5491 nend
= nbody
+ nlen
;
5493 /* If display line has unknown contents, write the whole line. */
5494 if (must_write_whole_line_p
)
5496 /* Ignore spaces at the end, if we can. */
5497 if (!write_spaces_p
)
5498 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5501 /* Write the contents of the desired line. */
5504 cursor_to (vpos
, 0);
5505 write_glyphs (nbody
, nlen
);
5508 /* Don't call clear_end_of_line if we already wrote the whole
5509 line. The cursor will not be at the right margin in that
5510 case but in the line below. */
5511 if (nlen
< FRAME_TOTAL_COLS (f
))
5513 cursor_to (vpos
, nlen
);
5514 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5517 /* Make sure we are in the right row, otherwise cursor movement
5518 with cmgoto might use `ch' in the wrong row. */
5519 cursor_to (vpos
, 0);
5521 make_current (desired_matrix
, current_matrix
, vpos
);
5525 /* Pretend trailing spaces are not there at all,
5526 unless for one reason or another we must write all spaces. */
5527 if (!write_spaces_p
)
5528 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5531 /* If there's no i/d char, quickly do the best we can without it. */
5532 if (!char_ins_del_ok
)
5536 /* Find the first glyph in desired row that doesn't agree with
5537 a glyph in the current row, and write the rest from there on. */
5538 for (i
= 0; i
< nlen
; i
++)
5540 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5542 /* Find the end of the run of different glyphs. */
5546 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5547 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5550 /* Output this run of non-matching chars. */
5551 cursor_to (vpos
, i
);
5552 write_glyphs (nbody
+ i
, j
- i
);
5555 /* Now find the next non-match. */
5559 /* Clear the rest of the line, or the non-clear part of it. */
5562 cursor_to (vpos
, nlen
);
5563 clear_end_of_line (olen
);
5566 /* Make current row = desired row. */
5567 make_current (desired_matrix
, current_matrix
, vpos
);
5571 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5572 characters in a row. */
5576 /* If current line is blank, skip over initial spaces, if
5577 possible, and write the rest. */
5581 nsp
= count_blanks (nbody
, nlen
);
5585 cursor_to (vpos
, nsp
);
5586 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5589 /* Exchange contents between current_frame and new_frame. */
5590 make_current (desired_matrix
, current_matrix
, vpos
);
5594 /* Compute number of leading blanks in old and new contents. */
5595 osp
= count_blanks (obody
, olen
);
5596 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5598 /* Compute number of matching chars starting with first non-blank. */
5599 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5600 nbody
+ nsp
, nbody
+ nlen
);
5602 /* Spaces in new match implicit space past the end of old. */
5603 /* A bug causing this to be a no-op was fixed in 18.29. */
5604 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5607 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5611 /* Avoid doing insert/delete char
5612 just cause number of leading spaces differs
5613 when the following text does not match. */
5614 if (begmatch
== 0 && osp
!= nsp
)
5615 osp
= nsp
= min (osp
, nsp
);
5617 /* Find matching characters at end of line */
5620 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5622 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5627 endmatch
= obody
+ olen
- op1
;
5629 /* tem gets the distance to insert or delete.
5630 endmatch is how many characters we save by doing so.
5633 tem
= (nlen
- nsp
) - (olen
- osp
);
5635 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (f
)[tem
]))
5638 /* nsp - osp is the distance to insert or delete.
5639 If that is nonzero, begmatch is known to be nonzero also.
5640 begmatch + endmatch is how much we save by doing the ins/del.
5644 && (!char_ins_del_ok
5645 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5649 osp
= nsp
= min (osp
, nsp
);
5652 /* Now go through the line, inserting, writing and
5653 deleting as appropriate. */
5657 cursor_to (vpos
, nsp
);
5658 delete_glyphs (osp
- nsp
);
5662 /* If going to delete chars later in line
5663 and insert earlier in the line,
5664 must delete first to avoid losing data in the insert */
5665 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5667 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5668 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5669 olen
= nlen
- (nsp
- osp
);
5671 cursor_to (vpos
, osp
);
5672 insert_glyphs (0, nsp
- osp
);
5676 tem
= nsp
+ begmatch
+ endmatch
;
5677 if (nlen
!= tem
|| olen
!= tem
)
5679 if (!endmatch
|| nlen
== olen
)
5681 /* If new text being written reaches right margin, there is
5682 no need to do clear-to-eol at the end of this function
5683 (and it would not be safe, since cursor is not going to
5684 be "at the margin" after the text is done). */
5685 if (nlen
== FRAME_TOTAL_COLS (f
))
5688 /* Function write_glyphs is prepared to do nothing
5689 if passed a length <= 0. Check it here to avoid
5690 unnecessary cursor movement. */
5693 cursor_to (vpos
, nsp
+ begmatch
);
5694 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5697 else if (nlen
> olen
)
5699 /* Here, we used to have the following simple code:
5700 ----------------------------------------
5701 write_glyphs (nbody + nsp + begmatch, olen - tem);
5702 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5703 ----------------------------------------
5704 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5705 is a padding glyph. */
5706 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5709 cursor_to (vpos
, nsp
+ begmatch
);
5711 /* Calculate columns we can actually overwrite. */
5712 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5714 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5716 /* If we left columns to be overwritten, we must delete them. */
5717 del
= olen
- tem
- out
;
5719 delete_glyphs (del
);
5721 /* At last, we insert columns not yet written out. */
5722 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5725 else if (olen
> nlen
)
5727 cursor_to (vpos
, nsp
+ begmatch
);
5728 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5729 delete_glyphs (olen
- nlen
);
5735 /* If any unerased characters remain after the new line, erase them. */
5738 cursor_to (vpos
, nlen
);
5739 clear_end_of_line (olen
);
5742 /* Exchange contents between current_frame and new_frame. */
5743 make_current (desired_matrix
, current_matrix
, vpos
);
5748 /***********************************************************************
5749 X/Y Position -> Buffer Position
5750 ***********************************************************************/
5752 /* Determine what's under window-relative pixel position (*X, *Y).
5753 Return the object (string or buffer) that's there.
5754 Return in *POS the position in that object.
5755 Adjust *X and *Y to character positions. */
5758 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5761 struct display_pos
*pos
;
5762 Lisp_Object
*object
;
5764 int *width
, *height
;
5767 struct buffer
*old_current_buffer
= current_buffer
;
5768 struct text_pos startp
;
5770 struct glyph_row
*row
;
5771 #ifdef HAVE_WINDOW_SYSTEM
5772 struct image
*img
= 0;
5776 current_buffer
= XBUFFER (w
->buffer
);
5777 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5778 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5779 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5780 start_display (&it
, w
, startp
);
5782 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5783 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5784 MOVE_TO_X
| MOVE_TO_Y
);
5786 current_buffer
= old_current_buffer
;
5788 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5789 *dy
= *y
- it
.current_y
;
5792 if (STRINGP (it
.string
))
5796 #ifdef HAVE_WINDOW_SYSTEM
5797 if (it
.what
== IT_IMAGE
)
5799 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5800 && !NILP (img
->spec
))
5801 *object
= img
->spec
;
5805 if (it
.vpos
< w
->current_matrix
->nrows
5806 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5809 if (it
.hpos
< row
->used
[TEXT_AREA
])
5811 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5812 #ifdef HAVE_WINDOW_SYSTEM
5815 *dy
-= row
->ascent
- glyph
->ascent
;
5816 *dx
+= glyph
->slice
.x
;
5817 *dy
+= glyph
->slice
.y
;
5818 /* Image slices positions are still relative to the entire image */
5819 *width
= img
->width
;
5820 *height
= img
->height
;
5825 *width
= glyph
->pixel_width
;
5826 *height
= glyph
->ascent
+ glyph
->descent
;
5832 *height
= row
->height
;
5837 *width
= *height
= 0;
5840 /* Add extra (default width) columns if clicked after EOL. */
5841 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5843 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5852 /* Value is the string under window-relative coordinates X/Y in the
5853 mode line or header line (PART says which) of window W, or nil if none.
5854 *CHARPOS is set to the position in the string returned. */
5857 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5859 enum window_part part
;
5862 Lisp_Object
*object
;
5864 int *width
, *height
;
5866 struct glyph_row
*row
;
5867 struct glyph
*glyph
, *end
;
5869 Lisp_Object string
= Qnil
;
5871 if (part
== ON_MODE_LINE
)
5872 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5874 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5876 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5878 if (row
->mode_line_p
&& row
->enabled_p
)
5880 /* Find the glyph under X. If we find one with a string object,
5881 it's the one we were looking for. */
5882 glyph
= row
->glyphs
[TEXT_AREA
];
5883 end
= glyph
+ row
->used
[TEXT_AREA
];
5884 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5885 x0
-= glyph
->pixel_width
;
5886 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5889 string
= glyph
->object
;
5890 *charpos
= glyph
->charpos
;
5891 *width
= glyph
->pixel_width
;
5892 *height
= glyph
->ascent
+ glyph
->descent
;
5893 #ifdef HAVE_WINDOW_SYSTEM
5894 if (glyph
->type
== IMAGE_GLYPH
)
5897 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5899 *object
= img
->spec
;
5900 y0
-= row
->ascent
- glyph
->ascent
;
5906 /* Add extra (default width) columns if clicked after EOL. */
5907 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5909 *height
= row
->height
;
5916 *width
= *height
= 0;
5926 /* Value is the string under window-relative coordinates X/Y in either
5927 marginal area, or nil if none. *CHARPOS is set to the position in
5928 the string returned. */
5931 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
5933 enum window_part part
;
5936 Lisp_Object
*object
;
5938 int *width
, *height
;
5940 struct glyph_row
*row
= w
->current_matrix
->rows
;
5941 struct glyph
*glyph
, *end
;
5942 int x0
, y0
, i
, wy
= *y
;
5944 Lisp_Object string
= Qnil
;
5946 if (part
== ON_LEFT_MARGIN
)
5947 area
= LEFT_MARGIN_AREA
;
5948 else if (part
== ON_RIGHT_MARGIN
)
5949 area
= RIGHT_MARGIN_AREA
;
5953 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5954 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5957 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5961 /* Find the glyph under X. If we find one with a string object,
5962 it's the one we were looking for. */
5963 if (area
== RIGHT_MARGIN_AREA
)
5964 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5965 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5966 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5967 + window_box_width (w
, LEFT_MARGIN_AREA
)
5968 + window_box_width (w
, TEXT_AREA
));
5970 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5971 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5974 glyph
= row
->glyphs
[area
];
5975 end
= glyph
+ row
->used
[area
];
5976 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5977 x0
-= glyph
->pixel_width
;
5978 *x
= glyph
- row
->glyphs
[area
];
5981 string
= glyph
->object
;
5982 *charpos
= glyph
->charpos
;
5983 *width
= glyph
->pixel_width
;
5984 *height
= glyph
->ascent
+ glyph
->descent
;
5985 #ifdef HAVE_WINDOW_SYSTEM
5986 if (glyph
->type
== IMAGE_GLYPH
)
5989 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5991 *object
= img
->spec
;
5992 y0
-= row
->ascent
- glyph
->ascent
;
5993 x0
+= glyph
->slice
.x
;
5994 y0
+= glyph
->slice
.y
;
6000 /* Add extra (default width) columns if clicked after EOL. */
6001 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6003 *height
= row
->height
;
6010 *width
= *height
= 0;
6020 /***********************************************************************
6021 Changing Frame Sizes
6022 ***********************************************************************/
6027 window_change_signal (signalnum
) /* If we don't have an argument, */
6028 int signalnum
; /* some compilers complain in signal calls. */
6034 int old_errno
= errno
;
6036 signal (SIGWINCH
, window_change_signal
);
6037 SIGNAL_THREAD_CHECK (signalnum
);
6039 get_frame_size (&width
, &height
);
6041 /* The frame size change obviously applies to a termcap-controlled
6042 frame. Find such a frame in the list, and assume it's the only
6043 one (since the redisplay code always writes to stdout, not a
6044 FILE * specified in the frame structure). Record the new size,
6045 but don't reallocate the data structures now. Let that be done
6046 later outside of the signal handler. */
6049 Lisp_Object tail
, frame
;
6051 FOR_EACH_FRAME (tail
, frame
)
6053 if (FRAME_TERMCAP_P (XFRAME (frame
)))
6055 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6063 #endif /* SIGWINCH */
6066 /* Do any change in frame size that was requested by a signal. SAFE
6067 non-zero means this function is called from a place where it is
6068 safe to change frame sizes while a redisplay is in progress. */
6071 do_pending_window_change (safe
)
6074 /* If window_change_signal should have run before, run it now. */
6075 if (redisplaying_p
&& !safe
)
6078 while (delayed_size_change
)
6080 Lisp_Object tail
, frame
;
6082 delayed_size_change
= 0;
6084 FOR_EACH_FRAME (tail
, frame
)
6086 struct frame
*f
= XFRAME (frame
);
6088 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6089 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6096 /* Change the frame height and/or width. Values may be given as zero to
6097 indicate no change is to take place.
6099 If DELAY is non-zero, then assume we're being called from a signal
6100 handler, and queue the change for later - perhaps the next
6101 redisplay. Since this tries to resize windows, we can't call it
6102 from a signal handler.
6104 SAFE non-zero means this function is called from a place where it's
6105 safe to change frame sizes while a redisplay is in progress. */
6108 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6109 register struct frame
*f
;
6110 int newheight
, newwidth
, pretend
, delay
, safe
;
6112 Lisp_Object tail
, frame
;
6114 if (! FRAME_WINDOW_P (f
))
6116 /* When using termcap, or on MS-DOS, all frames use
6117 the same screen, so a change in size affects all frames. */
6118 FOR_EACH_FRAME (tail
, frame
)
6119 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6120 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6121 pretend
, delay
, safe
);
6124 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6128 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6129 register struct frame
*f
;
6130 int newheight
, newwidth
, pretend
, delay
, safe
;
6132 int new_frame_total_cols
;
6133 int count
= SPECPDL_INDEX ();
6135 /* If we can't deal with the change now, queue it for later. */
6136 if (delay
|| (redisplaying_p
&& !safe
))
6138 f
->new_text_lines
= newheight
;
6139 f
->new_text_cols
= newwidth
;
6140 delayed_size_change
= 1;
6144 /* This size-change overrides any pending one for this frame. */
6145 f
->new_text_lines
= 0;
6146 f
->new_text_cols
= 0;
6148 /* If an argument is zero, set it to the current value. */
6150 newheight
= FRAME_LINES (f
);
6152 newwidth
= FRAME_COLS (f
);
6154 /* Compute width of windows in F.
6155 This is the width of the frame without vertical scroll bars. */
6156 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6158 /* Round up to the smallest acceptable size. */
6159 check_frame_size (f
, &newheight
, &newwidth
);
6161 /* If we're not changing the frame size, quit now. */
6162 if (newheight
== FRAME_LINES (f
)
6163 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6169 /* We only can set screen dimensions to certain values supported
6170 by our video hardware. Try to find the smallest size greater
6171 or equal to the requested dimensions. */
6172 dos_set_window_size (&newheight
, &newwidth
);
6175 if (newheight
!= FRAME_LINES (f
))
6177 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6179 /* Frame has both root and mini-buffer. */
6180 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6181 FRAME_TOP_MARGIN (f
));
6182 set_window_height (FRAME_ROOT_WINDOW (f
),
6185 - FRAME_TOP_MARGIN (f
)),
6187 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6189 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6192 /* Frame has just one top-level window. */
6193 set_window_height (FRAME_ROOT_WINDOW (f
),
6194 newheight
- FRAME_TOP_MARGIN (f
), 0);
6196 if (FRAME_TERMCAP_P (f
) && !pretend
)
6197 FrameRows
= newheight
;
6200 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6202 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6203 if (FRAME_HAS_MINIBUF_P (f
))
6204 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6206 if (FRAME_TERMCAP_P (f
) && !pretend
)
6207 FrameCols
= newwidth
;
6209 if (WINDOWP (f
->tool_bar_window
))
6210 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6213 FRAME_LINES (f
) = newheight
;
6214 SET_FRAME_COLS (f
, newwidth
);
6217 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6218 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6220 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6222 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6223 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6224 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6225 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6229 calculate_costs (f
);
6230 SET_FRAME_GARBAGED (f
);
6235 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6237 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6238 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6239 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6241 unbind_to (count
, Qnil
);
6246 /***********************************************************************
6247 Terminal Related Lisp Functions
6248 ***********************************************************************/
6250 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6251 1, 1, "FOpen termscript file: ",
6252 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6253 FILE = nil means just close any termscript file currently open. */)
6257 if (termscript
!= 0) fclose (termscript
);
6262 file
= Fexpand_file_name (file
, Qnil
);
6263 termscript
= fopen (SDATA (file
), "w");
6264 if (termscript
== 0)
6265 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6271 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6272 Ssend_string_to_terminal
, 1, 1, 0,
6273 doc
: /* Send STRING to the terminal without alteration.
6274 Control characters in STRING will have terminal-dependent effects. */)
6278 /* ??? Perhaps we should do something special for multibyte strings here. */
6279 CHECK_STRING (string
);
6280 fwrite (SDATA (string
), 1, SBYTES (string
), stdout
);
6284 fwrite (SDATA (string
), 1, SBYTES (string
),
6286 fflush (termscript
);
6292 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6293 doc
: /* Beep, or flash the screen.
6294 Also, unless an argument is given,
6295 terminate any keyboard macro currently executing. */)
6318 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6319 error ("Keyboard macro terminated by a command ringing the bell");
6327 /***********************************************************************
6329 ***********************************************************************/
6331 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6332 doc
: /* Pause, without updating display, for SECONDS seconds.
6333 SECONDS may be a floating-point value, meaning that you can wait for a
6334 fraction of a second. Optional second arg MILLISECONDS specifies an
6335 additional wait period, in milliseconds; this may be useful if your
6336 Emacs was built without floating point support.
6337 \(Not all operating systems support waiting for a fraction of a second.) */)
6338 (seconds
, milliseconds
)
6339 Lisp_Object seconds
, milliseconds
;
6343 if (NILP (milliseconds
))
6344 XSETINT (milliseconds
, 0);
6346 CHECK_NUMBER (milliseconds
);
6347 usec
= XINT (milliseconds
) * 1000;
6350 double duration
= extract_float (seconds
);
6351 sec
= (int) duration
;
6352 usec
+= (duration
- sec
) * 1000000;
6355 #ifndef EMACS_HAS_USECS
6356 if (sec
== 0 && usec
!= 0)
6357 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6360 /* Assure that 0 <= usec < 1000000. */
6363 /* We can't rely on the rounding being correct if usec is negative. */
6364 if (-1000000 < usec
)
6365 sec
--, usec
+= 1000000;
6367 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6370 sec
+= usec
/ 1000000, usec
%= 1000000;
6372 if (sec
< 0 || (sec
== 0 && usec
== 0))
6375 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6381 /* This is just like wait_reading_process_output, except that
6382 it does the redisplay.
6384 It's also much like Fsit_for, except that it can be used for
6385 waiting for input as well. */
6388 sit_for (sec
, usec
, reading
, display
, initial_display
)
6389 int sec
, usec
, reading
, display
, initial_display
;
6391 swallow_events (display
);
6393 if ((detect_input_pending_run_timers (display
)
6394 && !redisplay_dont_pause
)
6395 || !NILP (Vexecuting_kbd_macro
))
6398 if (initial_display
)
6399 redisplay_preserve_echo_area (2);
6401 if (sec
== 0 && usec
== 0)
6408 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, display
,
6411 return detect_input_pending () ? Qnil
: Qt
;
6415 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6416 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6417 SECONDS may be a floating-point value, meaning that you can wait for a
6418 fraction of a second.
6419 \(Not all operating systems support waiting for a fraction of a second.)
6420 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6421 Redisplay is preempted as always if input arrives, and does not happen
6422 if input is available before it starts.
6423 Value is t if waited the full time with no input arriving.
6425 Redisplay will occur even when input is available if you bind
6426 `redisplay-dont-pause' to a non-nil value.
6428 An obsolete but still supported form is
6429 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6430 Where the optional arg MILLISECONDS specifies an additional wait period,
6431 in milliseconds; this was useful when Emacs was built without
6432 floating point support.
6433 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6435 /* The `old-nodisp' stuff is there so that the arglist has the correct
6436 length. Otherwise, `defdvice' will redefine it with fewer args. */
6437 (seconds
, milliseconds
, nodisp
)
6438 Lisp_Object seconds
, milliseconds
, nodisp
;
6442 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6444 nodisp
= milliseconds
;
6445 milliseconds
= Qnil
;
6448 if (NILP (milliseconds
))
6449 XSETINT (milliseconds
, 0);
6451 CHECK_NUMBER (milliseconds
);
6452 usec
= XINT (milliseconds
) * 1000;
6455 double duration
= extract_float (seconds
);
6456 sec
= (int) duration
;
6457 usec
+= (duration
- sec
) * 1000000;
6460 #ifndef EMACS_HAS_USECS
6461 if (usec
!= 0 && sec
== 0)
6462 error ("Millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6465 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6470 /***********************************************************************
6471 Other Lisp Functions
6472 ***********************************************************************/
6474 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6475 session's frames, frame names, buffers, buffer-read-only flags, and
6476 buffer-modified-flags. */
6478 static Lisp_Object frame_and_buffer_state
;
6481 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6482 Sframe_or_buffer_changed_p
, 0, 1, 0,
6483 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6484 VARIABLE is a variable name whose value is either nil or a state vector
6485 that will be updated to contain all frames and buffers,
6486 aside from buffers whose names start with space,
6487 along with the buffers' read-only and modified flags. This allows a fast
6488 check to see whether buffer menus might need to be recomputed.
6489 If this function returns non-nil, it updates the internal vector to reflect
6492 If VARIABLE is nil, an internal variable is used. Users should not
6493 pass nil for VARIABLE. */)
6495 Lisp_Object variable
;
6497 Lisp_Object state
, tail
, frame
, buf
;
6498 Lisp_Object
*vecp
, *end
;
6501 if (! NILP (variable
))
6503 CHECK_SYMBOL (variable
);
6504 state
= Fsymbol_value (variable
);
6505 if (! VECTORP (state
))
6509 state
= frame_and_buffer_state
;
6511 vecp
= XVECTOR (state
)->contents
;
6512 end
= vecp
+ XVECTOR (state
)->size
;
6514 FOR_EACH_FRAME (tail
, frame
)
6518 if (!EQ (*vecp
++, frame
))
6522 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6525 /* Check that the buffer info matches. */
6526 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6528 buf
= XCDR (XCAR (tail
));
6529 /* Ignore buffers that aren't included in buffer lists. */
6530 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6534 if (!EQ (*vecp
++, buf
))
6538 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6542 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6547 /* Detect deletion of a buffer at the end of the list. */
6548 if (EQ (*vecp
, Qlambda
))
6551 /* Come here if we decide the data has changed. */
6553 /* Count the size we will need.
6554 Start with 1 so there is room for at least one lambda at the end. */
6556 FOR_EACH_FRAME (tail
, frame
)
6558 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6560 /* Reallocate the vector if data has grown to need it,
6561 or if it has shrunk a lot. */
6562 if (! VECTORP (state
)
6563 || n
> XVECTOR (state
)->size
6564 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6565 /* Add 20 extra so we grow it less often. */
6567 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6568 if (! NILP (variable
))
6569 Fset (variable
, state
);
6571 frame_and_buffer_state
= state
;
6574 /* Record the new data in the (possibly reallocated) vector. */
6575 vecp
= XVECTOR (state
)->contents
;
6576 FOR_EACH_FRAME (tail
, frame
)
6579 *vecp
++ = XFRAME (frame
)->name
;
6581 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6583 buf
= XCDR (XCAR (tail
));
6584 /* Ignore buffers that aren't included in buffer lists. */
6585 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6588 *vecp
++ = XBUFFER (buf
)->read_only
;
6589 *vecp
++ = Fbuffer_modified_p (buf
);
6591 /* Fill up the vector with lambdas (always at least one). */
6593 while (vecp
- XVECTOR (state
)->contents
6594 < XVECTOR (state
)->size
)
6596 /* Make sure we didn't overflow the vector. */
6597 if (vecp
- XVECTOR (state
)->contents
6598 > XVECTOR (state
)->size
)
6605 /***********************************************************************
6607 ***********************************************************************/
6609 char *terminal_type
;
6611 /* Initialization done when Emacs fork is started, before doing stty.
6612 Determine terminal type and set terminal_driver. Then invoke its
6613 decoding routine to set up variables in the terminal package. */
6618 #ifdef HAVE_X_WINDOWS
6619 extern int display_arg
;
6622 /* Construct the space glyph. */
6623 space_glyph
.type
= CHAR_GLYPH
;
6624 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6625 space_glyph
.charpos
= -1;
6629 cursor_in_echo_area
= 0;
6630 terminal_type
= (char *) 0;
6632 /* Now is the time to initialize this; it's used by init_sys_modes
6634 Vwindow_system
= Qnil
;
6636 /* If the user wants to use a window system, we shouldn't bother
6637 initializing the terminal. This is especially important when the
6638 terminal is so dumb that emacs gives up before and doesn't bother
6639 using the window system.
6641 If the DISPLAY environment variable is set and nonempty,
6642 try to use X, and die with an error message if that doesn't work. */
6644 #ifdef HAVE_X_WINDOWS
6645 if (! inhibit_window_system
&& ! display_arg
)
6649 display
= getenv ("DECW$DISPLAY");
6651 display
= getenv ("DISPLAY");
6654 display_arg
= (display
!= 0 && *display
!= 0);
6656 if (display_arg
&& !x_display_ok (display
))
6658 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6660 inhibit_window_system
= 1;
6664 if (!inhibit_window_system
&& display_arg
6670 Vwindow_system
= intern ("x");
6672 Vwindow_system_version
= make_number (11);
6674 Vwindow_system_version
= make_number (10);
6676 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6677 /* In some versions of ncurses,
6678 tputs crashes if we have not called tgetent.
6680 { char b
[2044]; tgetent (b
, "xterm");}
6682 adjust_frame_glyphs_initially ();
6685 #endif /* HAVE_X_WINDOWS */
6688 if (!inhibit_window_system
)
6690 Vwindow_system
= intern ("w32");
6691 Vwindow_system_version
= make_number (1);
6692 adjust_frame_glyphs_initially ();
6695 #endif /* HAVE_NTGUI */
6698 if (!inhibit_window_system
)
6700 Vwindow_system
= intern ("mac");
6701 Vwindow_system_version
= make_number (1);
6702 adjust_frame_glyphs_initially ();
6707 /* If no window system has been specified, try to use the terminal. */
6710 fatal ("standard input is not a tty");
6714 /* Look at the TERM variable. */
6715 terminal_type
= (char *) getenv ("TERM");
6719 fprintf (stderr
, "Please specify your terminal type.\n\
6720 For types defined in VMS, use set term /device=TYPE.\n\
6721 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6722 \(The quotation marks are necessary since terminal types are lower case.)\n");
6724 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6730 /* VMS DCL tends to up-case things, so down-case term type.
6731 Hardly any uppercase letters in terminal types; should be none. */
6733 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6736 strcpy (new, terminal_type
);
6738 for (p
= new; *p
; p
++)
6742 terminal_type
= new;
6746 term_init (terminal_type
);
6749 struct frame
*sf
= SELECTED_FRAME ();
6750 int width
= FRAME_TOTAL_COLS (sf
);
6751 int height
= FRAME_LINES (sf
);
6753 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6755 /* If these sizes are so big they cause overflow, just ignore the
6756 change. It's not clear what better we could do. */
6757 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6758 fatal ("screen size %dx%d too big", width
, height
);
6761 adjust_frame_glyphs_initially ();
6762 calculate_costs (XFRAME (selected_frame
));
6767 #endif /* CANNOT_DUMP */
6768 signal (SIGWINCH
, window_change_signal
);
6769 #endif /* SIGWINCH */
6771 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6775 /* The MSDOS terminal turns on its ``window system'' relatively
6776 late into the startup, so we cannot do the frame faces'
6777 initialization just yet. It will be done later by pc-win.el
6778 and internal_terminal_init. */
6779 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6781 && NILP (Vwindow_system
))
6783 /* For the initial frame, we don't have any way of knowing what
6784 are the foreground and background colors of the terminal. */
6785 struct frame
*sf
= SELECTED_FRAME();
6787 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6788 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6789 call0 (intern ("tty-set-up-initial-frame-faces"));
6795 /***********************************************************************
6797 ***********************************************************************/
6799 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6800 Sinternal_show_cursor
, 2, 2, 0,
6801 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6802 WINDOW nil means use the selected window. SHOW non-nil means
6803 show a cursor in WINDOW in the next redisplay. SHOW nil means
6804 don't show a cursor. */)
6806 Lisp_Object window
, show
;
6808 /* Don't change cursor state while redisplaying. This could confuse
6810 if (!redisplaying_p
)
6813 window
= selected_window
;
6815 CHECK_WINDOW (window
);
6817 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6824 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6825 Sinternal_show_cursor_p
, 0, 1, 0,
6826 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6827 WINDOW nil or omitted means report on the selected window. */)
6834 window
= selected_window
;
6836 CHECK_WINDOW (window
);
6838 w
= XWINDOW (window
);
6839 return w
->cursor_off_p
? Qnil
: Qt
;
6843 /***********************************************************************
6845 ***********************************************************************/
6850 defsubr (&Sredraw_frame
);
6851 defsubr (&Sredraw_display
);
6852 defsubr (&Sframe_or_buffer_changed_p
);
6853 defsubr (&Sopen_termscript
);
6855 defsubr (&Ssit_for
);
6856 defsubr (&Ssleep_for
);
6857 defsubr (&Ssend_string_to_terminal
);
6858 defsubr (&Sinternal_show_cursor
);
6859 defsubr (&Sinternal_show_cursor_p
);
6862 defsubr (&Sdump_redisplay_history
);
6865 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6866 staticpro (&frame_and_buffer_state
);
6868 Qdisplay_table
= intern ("display-table");
6869 staticpro (&Qdisplay_table
);
6870 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6871 staticpro (&Qredisplay_dont_pause
);
6873 DEFVAR_INT ("baud-rate", &baud_rate
,
6874 doc
: /* *The output baud rate of the terminal.
6875 On most systems, changing this value will affect the amount of padding
6876 and the other strategic decisions made during redisplay. */);
6878 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6879 doc
: /* *Non-nil means invert the entire frame display.
6880 This means everything is in inverse video which otherwise would not be. */);
6882 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6883 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6885 See also `ring-bell-function'. */);
6887 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6888 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6889 A non-nil value is useful if the terminal can automatically preserve
6890 Emacs's frame display when you reenter Emacs.
6891 It is up to you to set this variable if your terminal can do that. */);
6893 DEFVAR_LISP ("window-system", &Vwindow_system
,
6894 doc
: /* Name of window system that Emacs is displaying through.
6895 The value is a symbol--for instance, `x' for X windows.
6896 The value is nil if Emacs is using a text-only terminal. */);
6898 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6899 doc
: /* The version number of the window system in use.
6900 For X windows, this is 10 or 11. */);
6902 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6903 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6905 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6906 doc
: /* Table defining how to output a glyph code to the frame.
6907 If not nil, this is a vector indexed by glyph code to define the glyph.
6908 Each element can be:
6909 integer: a glyph code which this glyph is an alias for.
6910 string: output this glyph using that string (not impl. in X windows).
6911 nil: this glyph mod 524288 is the code of a character to output,
6912 and this glyph / 524288 is the face number (see `face-id') to use
6913 while outputting it. */);
6914 Vglyph_table
= Qnil
;
6916 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6917 doc
: /* Display table to use for buffers that specify none.
6918 See `buffer-display-table' for more information. */);
6919 Vstandard_display_table
= Qnil
;
6921 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6922 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6923 redisplay_dont_pause
= 0;
6925 /* Initialize `window-system', unless init_display already decided it. */
6930 Vwindow_system
= Qnil
;
6931 Vwindow_system_version
= Qnil
;
6935 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6936 (do not change this comment) */