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, 2007, 2008, 2009, 2010 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 3 of the License, or
11 (at your option) any later version.
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. If not, see <http://www.gnu.org/licenses/>. */
34 /* cm.h must come after dispextern.h on Windows. */
35 #include "dispextern.h"
38 #include "character.h"
41 #include "termhooks.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 #include "syssignal.h"
54 #endif /* HAVE_X_WINDOWS */
58 #endif /* HAVE_NTGUI */
64 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
69 /* Get number of chars of output now in the buffer of a stdio stream.
70 This ought to be built in in stdio, but it isn't. Some s- files
71 override this because their stdio internals differ. */
73 #ifdef __GNU_LIBRARY__
75 /* The s- file might have overridden the definition with one that
76 works for the system's C library. But we are using the GNU C
77 library, so this is the right definition for every system. */
79 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
80 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
82 #undef PENDING_OUTPUT_COUNT
83 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
85 #else /* not __GNU_LIBRARY__ */
86 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
87 #include <stdio_ext.h>
88 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
90 #ifndef PENDING_OUTPUT_COUNT
91 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
93 #endif /* not __GNU_LIBRARY__ */
95 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
96 #include <term.h> /* for tgetent */
99 /* Structure to pass dimensions around. Used for character bounding
100 boxes, glyph matrix dimensions and alike. */
109 /* Function prototypes. */
111 static struct glyph_matrix
*save_current_matrix (struct frame
*);
112 static void restore_current_matrix (struct frame
*, struct glyph_matrix
*);
113 static int showing_window_margins_p (struct window
*);
114 static void fake_current_matrices (Lisp_Object
);
115 static void redraw_overlapping_rows (struct window
*, int);
116 static void redraw_overlapped_rows (struct window
*, int);
117 static int count_blanks (struct glyph
*, int);
118 static int count_match (struct glyph
*, struct glyph
*,
119 struct glyph
*, struct glyph
*);
120 static unsigned line_draw_cost (struct glyph_matrix
*, int);
121 static void update_frame_line (struct frame
*, int);
122 static struct dim allocate_matrices_for_frame_redisplay
123 (Lisp_Object
, int, int, int, int *);
124 static void allocate_matrices_for_window_redisplay (struct window
*);
125 static int realloc_glyph_pool (struct glyph_pool
*, struct dim
);
126 static void adjust_frame_glyphs (struct frame
*);
127 struct glyph_matrix
*new_glyph_matrix (struct glyph_pool
*);
128 static void free_glyph_matrix (struct glyph_matrix
*);
129 static void adjust_glyph_matrix (struct window
*, struct glyph_matrix
*,
130 int, int, struct dim
);
131 static void change_frame_size_1 (struct frame
*, int, int, int, int, int);
132 static void swap_glyph_pointers (struct glyph_row
*, struct glyph_row
*);
134 static int glyph_row_slice_p (struct glyph_row
*, struct glyph_row
*);
136 static void fill_up_frame_row_with_spaces (struct glyph_row
*, int);
137 static void build_frame_matrix_from_window_tree (struct glyph_matrix
*,
139 static void build_frame_matrix_from_leaf_window (struct glyph_matrix
*,
141 static struct glyph_pool
*new_glyph_pool (void);
142 static void free_glyph_pool (struct glyph_pool
*);
143 static void adjust_frame_glyphs_initially (void);
144 static void adjust_frame_message_buffer (struct frame
*);
145 static void adjust_decode_mode_spec_buffer (struct frame
*);
146 static void fill_up_glyph_row_with_spaces (struct glyph_row
*);
147 static void build_frame_matrix (struct frame
*);
148 void clear_current_matrices (struct frame
*);
149 void scroll_glyph_matrix_range (struct glyph_matrix
*, int, int,
151 static void clear_window_matrices (struct window
*, int);
152 static void fill_up_glyph_row_area_with_spaces (struct glyph_row
*, int);
153 static int scrolling_window (struct window
*, int);
154 static int update_window_line (struct window
*, int, int *);
155 static void update_marginal_area (struct window
*, int, int);
156 static int update_text_area (struct window
*, int);
157 static void make_current (struct glyph_matrix
*, struct glyph_matrix
*,
159 static void mirror_make_current (struct window
*, int);
160 void check_window_matrix_pointers (struct window
*);
162 static void check_matrix_pointers (struct glyph_matrix
*,
163 struct glyph_matrix
*);
165 static void mirror_line_dance (struct window
*, int, int, int *, char *);
166 static int update_window_tree (struct window
*, int);
167 static int update_window (struct window
*, int);
168 static int update_frame_1 (struct frame
*, int, int);
169 static void set_window_cursor_after_update (struct window
*);
170 static int row_equal_p (struct window
*, struct glyph_row
*,
171 struct glyph_row
*, int);
172 static void adjust_frame_glyphs_for_window_redisplay (struct frame
*);
173 static void adjust_frame_glyphs_for_frame_redisplay (struct frame
*);
174 static void reverse_rows (struct glyph_matrix
*, int, int);
175 static int margin_glyphs_to_reserve (struct window
*, int, Lisp_Object
);
176 static void sync_window_with_frame_matrix_rows (struct window
*);
177 struct window
*frame_row_to_window (struct window
*, int);
180 /* Non-zero means don't pause redisplay for pending input. (This is
181 for debugging and for a future implementation of EDT-like
184 int redisplay_dont_pause
;
186 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
187 are supported, so we can check for input during redisplay at
188 regular intervals. */
189 #ifdef EMACS_HAS_USECS
190 #define PERIODIC_PREEMPTION_CHECKING 1
192 #define PERIODIC_PREEMPTION_CHECKING 0
195 #if PERIODIC_PREEMPTION_CHECKING
197 /* If a number (float), check for user input every N seconds. */
199 Lisp_Object Vredisplay_preemption_period
;
201 /* Redisplay preemption timers. */
203 static EMACS_TIME preemption_period
;
204 static EMACS_TIME preemption_next_check
;
208 /* Nonzero upon entry to redisplay means do not assume anything about
209 current contents of actual terminal frame; clear and redraw it. */
213 /* Nonzero means last display completed. Zero means it was preempted. */
215 int display_completed
;
217 /* Lisp variable visible-bell; enables use of screen-flash instead of
222 /* Invert the color of the whole frame, at a low level. */
226 /* Line speed of the terminal. */
230 /* Either nil or a symbol naming the window system under which Emacs
231 creates the first frame. */
233 Lisp_Object Vinitial_window_system
;
235 /* Version number of X windows: 10, 11 or nil. */
237 Lisp_Object Vwindow_system_version
;
239 /* Vector of glyph definitions. Indexed by glyph number, the contents
240 are a string which is how to output the glyph.
242 If Vglyph_table is nil, a glyph is output by using its low 8 bits
245 This is an obsolete feature that is no longer used. The variable
246 is retained for compatibility. */
248 Lisp_Object Vglyph_table
;
250 /* Display table to use for vectors that don't specify their own. */
252 Lisp_Object Vstandard_display_table
;
254 /* Nonzero means reading single-character input with prompt so put
255 cursor on mini-buffer after the prompt. Positive means at end of
256 text in echo area; negative means at beginning of line. */
258 int cursor_in_echo_area
;
260 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
263 /* The currently selected frame. In a single-frame version, this
264 variable always equals the_only_frame. */
266 Lisp_Object selected_frame
;
268 /* A frame which is not just a mini-buffer, or 0 if there are no such
269 frames. This is usually the most recent such frame that was
270 selected. In a single-frame version, this variable always holds
271 the address of the_only_frame. */
273 struct frame
*last_nonminibuf_frame
;
275 /* 1 means SIGWINCH happened when not safe. */
277 int delayed_size_change
;
279 /* 1 means glyph initialization has been completed at startup. */
281 static int glyphs_initialized_initially_p
;
283 /* Updated window if != 0. Set by update_window. */
285 struct window
*updated_window
;
287 /* Glyph row updated in update_window_line, and area that is updated. */
289 struct glyph_row
*updated_row
;
292 /* A glyph for a space. */
294 struct glyph space_glyph
;
296 /* Counts of allocated structures. These counts serve to diagnose
297 memory leaks and double frees. */
299 int glyph_matrix_count
;
300 int glyph_pool_count
;
302 /* If non-null, the frame whose frame matrices are manipulated. If
303 null, window matrices are worked on. */
305 static struct frame
*frame_matrix_frame
;
307 /* Non-zero means that fonts have been loaded since the last glyph
308 matrix adjustments. Redisplay must stop, and glyph matrices must
309 be adjusted when this flag becomes non-zero during display. The
310 reason fonts can be loaded so late is that fonts of fontsets are
311 loaded on demand. Another reason is that a line contains many
312 characters displayed by zero width or very narrow glyphs of
313 variable-width fonts. */
317 /* Convert vpos and hpos from frame to window and vice versa.
318 This may only be used for terminal frames. */
322 static int window_to_frame_vpos (struct window
*, int);
323 static int window_to_frame_hpos (struct window
*, int);
324 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
325 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
327 /* One element of the ring buffer containing redisplay history
330 struct redisplay_history
332 char trace
[512 + 100];
335 /* The size of the history buffer. */
337 #define REDISPLAY_HISTORY_SIZE 30
339 /* The redisplay history buffer. */
341 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
343 /* Next free entry in redisplay_history. */
345 static int history_idx
;
347 /* A tick that's incremented each time something is added to the
350 static unsigned history_tick
;
352 static void add_frame_display_history (struct frame
*, int);
353 static void add_window_display_history (struct window
*, char *, int);
355 /* Add to the redisplay history how window W has been displayed.
356 MSG is a trace containing the information how W's glyph matrix
357 has been constructed. PAUSED_P non-zero means that the update
358 has been interrupted for pending input. */
361 add_window_display_history (w
, msg
, paused_p
)
368 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
370 buf
= redisplay_history
[history_idx
].trace
;
373 sprintf (buf
, "%d: window %p (`%s')%s\n",
376 ((BUFFERP (w
->buffer
)
377 && STRINGP (XBUFFER (w
->buffer
)->name
))
378 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
380 paused_p
? " ***paused***" : "");
385 /* Add to the redisplay history that frame F has been displayed.
386 PAUSED_P non-zero means that the update has been interrupted for
390 add_frame_display_history (f
, paused_p
)
396 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
398 buf
= redisplay_history
[history_idx
].trace
;
401 sprintf (buf
, "%d: update frame %p%s",
403 f
, paused_p
? " ***paused***" : "");
407 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
408 Sdump_redisplay_history
, 0, 0, "",
409 doc
: /* Dump redisplay history to stderr. */)
414 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
417 i
= REDISPLAY_HISTORY_SIZE
- 1;
418 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
425 #else /* GLYPH_DEBUG == 0 */
427 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
428 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
430 #endif /* GLYPH_DEBUG == 0 */
433 #if defined PROFILING && !HAVE___EXECUTABLE_START
434 /* FIXME: only used to find text start for profiling. */
437 safe_bcopy (const char *from
, char *to
, int size
)
443 /***********************************************************************
445 ***********************************************************************/
447 /* Allocate and return a glyph_matrix structure. POOL is the glyph
448 pool from which memory for the matrix should be allocated, or null
449 for window-based redisplay where no glyph pools are used. The
450 member `pool' of the glyph matrix structure returned is set to
451 POOL, the structure is otherwise zeroed. */
453 struct glyph_matrix
*
454 new_glyph_matrix (struct glyph_pool
*pool
)
456 struct glyph_matrix
*result
;
458 /* Allocate and clear. */
459 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
460 memset (result
, 0, sizeof *result
);
462 /* Increment number of allocated matrices. This count is used
463 to detect memory leaks. */
464 ++glyph_matrix_count
;
466 /* Set pool and return. */
472 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
474 The global counter glyph_matrix_count is decremented when a matrix
475 is freed. If the count gets negative, more structures were freed
476 than allocated, i.e. one matrix was freed more than once or a bogus
477 pointer was passed to this function.
479 If MATRIX->pool is null, this means that the matrix manages its own
480 glyph memory---this is done for matrices on X frames. Freeing the
481 matrix also frees the glyph memory in this case. */
484 free_glyph_matrix (struct glyph_matrix
*matrix
)
490 /* Detect the case that more matrices are freed than were
492 if (--glyph_matrix_count
< 0)
495 /* Free glyph memory if MATRIX owns it. */
496 if (matrix
->pool
== NULL
)
497 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
498 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
500 /* Free row structures and the matrix itself. */
501 xfree (matrix
->rows
);
507 /* Return the number of glyphs to reserve for a marginal area of
508 window W. TOTAL_GLYPHS is the number of glyphs in a complete
509 display line of window W. MARGIN gives the width of the marginal
510 area in canonical character units. MARGIN should be an integer
514 margin_glyphs_to_reserve (struct window
*w
, int total_glyphs
, Lisp_Object margin
)
518 if (NUMBERP (margin
))
520 int width
= XFASTINT (w
->total_cols
);
521 double d
= max (0, XFLOATINT (margin
));
522 d
= min (width
/ 2 - 1, d
);
523 n
= (int) ((double) total_glyphs
/ width
* d
);
532 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
535 W is null if the function is called for a frame glyph matrix.
536 Otherwise it is the window MATRIX is a member of. X and Y are the
537 indices of the first column and row of MATRIX within the frame
538 matrix, if such a matrix exists. They are zero for purely
539 window-based redisplay. DIM is the needed size of the matrix.
541 In window-based redisplay, where no frame matrices exist, glyph
542 matrices manage their own glyph storage. Otherwise, they allocate
543 storage from a common frame glyph pool which can be found in
546 The reason for this memory management strategy is to avoid complete
547 frame redraws if possible. When we allocate from a common pool, a
548 change of the location or size of a sub-matrix within the pool
549 requires a complete redisplay of the frame because we cannot easily
550 make sure that the current matrices of all windows still agree with
551 what is displayed on the screen. While this is usually fast, it
552 leads to screen flickering. */
555 adjust_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int x
, int y
, struct dim dim
)
559 int marginal_areas_changed_p
= 0;
560 int header_line_changed_p
= 0;
561 int header_line_p
= 0;
562 int left
= -1, right
= -1;
563 int window_width
= -1, window_height
= -1;
565 /* See if W had a header line that has disappeared now, or vice versa.
569 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
571 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
572 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
574 matrix
->header_line_p
= header_line_p
;
576 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
577 Do nothing if MATRIX' size, position, vscroll, and marginal areas
578 haven't changed. This optimization is important because preserving
579 the matrix means preventing redisplay. */
580 if (matrix
->pool
== NULL
)
582 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
583 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
584 xassert (left
>= 0 && right
>= 0);
585 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
586 || right
!= matrix
->right_margin_glyphs
);
588 if (!marginal_areas_changed_p
590 && !header_line_changed_p
591 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
592 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
593 && matrix
->window_height
== window_height
594 && matrix
->window_vscroll
== w
->vscroll
595 && matrix
->window_width
== window_width
)
599 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
600 if (matrix
->rows_allocated
< dim
.height
)
602 int size
= dim
.height
* sizeof (struct glyph_row
);
603 new_rows
= dim
.height
- matrix
->rows_allocated
;
604 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
605 memset (matrix
->rows
+ matrix
->rows_allocated
, 0,
606 new_rows
* sizeof *matrix
->rows
);
607 matrix
->rows_allocated
= dim
.height
;
612 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
613 on a frame not using window-based redisplay. Set up pointers for
614 each row into the glyph pool. */
617 xassert (matrix
->pool
->glyphs
);
621 left
= margin_glyphs_to_reserve (w
, dim
.width
,
622 w
->left_margin_cols
);
623 right
= margin_glyphs_to_reserve (w
, dim
.width
,
624 w
->right_margin_cols
);
629 for (i
= 0; i
< dim
.height
; ++i
)
631 struct glyph_row
*row
= &matrix
->rows
[i
];
633 row
->glyphs
[LEFT_MARGIN_AREA
]
634 = (matrix
->pool
->glyphs
635 + (y
+ i
) * matrix
->pool
->ncolumns
639 || row
== matrix
->rows
+ dim
.height
- 1
640 || (row
== matrix
->rows
&& matrix
->header_line_p
))
642 row
->glyphs
[TEXT_AREA
]
643 = row
->glyphs
[LEFT_MARGIN_AREA
];
644 row
->glyphs
[RIGHT_MARGIN_AREA
]
645 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
646 row
->glyphs
[LAST_AREA
]
647 = row
->glyphs
[RIGHT_MARGIN_AREA
];
651 row
->glyphs
[TEXT_AREA
]
652 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
653 row
->glyphs
[RIGHT_MARGIN_AREA
]
654 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
655 row
->glyphs
[LAST_AREA
]
656 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
660 matrix
->left_margin_glyphs
= left
;
661 matrix
->right_margin_glyphs
= right
;
665 /* If MATRIX->pool is null, MATRIX is responsible for managing
666 its own memory. It is a window matrix for window-based redisplay.
667 Allocate glyph memory from the heap. */
668 if (dim
.width
> matrix
->matrix_w
670 || header_line_changed_p
671 || marginal_areas_changed_p
)
673 struct glyph_row
*row
= matrix
->rows
;
674 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
678 row
->glyphs
[LEFT_MARGIN_AREA
]
679 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
681 * sizeof (struct glyph
)));
683 /* The mode line never has marginal areas. */
684 if (row
== matrix
->rows
+ dim
.height
- 1
685 || (row
== matrix
->rows
&& matrix
->header_line_p
))
687 row
->glyphs
[TEXT_AREA
]
688 = row
->glyphs
[LEFT_MARGIN_AREA
];
689 row
->glyphs
[RIGHT_MARGIN_AREA
]
690 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
691 row
->glyphs
[LAST_AREA
]
692 = row
->glyphs
[RIGHT_MARGIN_AREA
];
696 row
->glyphs
[TEXT_AREA
]
697 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
698 row
->glyphs
[RIGHT_MARGIN_AREA
]
699 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
700 row
->glyphs
[LAST_AREA
]
701 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
707 xassert (left
>= 0 && right
>= 0);
708 matrix
->left_margin_glyphs
= left
;
709 matrix
->right_margin_glyphs
= right
;
712 /* Number of rows to be used by MATRIX. */
713 matrix
->nrows
= dim
.height
;
714 xassert (matrix
->nrows
>= 0);
718 if (matrix
== w
->current_matrix
)
720 /* Mark rows in a current matrix of a window as not having
721 valid contents. It's important to not do this for
722 desired matrices. When Emacs starts, it may already be
723 building desired matrices when this function runs. */
724 if (window_width
< 0)
725 window_width
= window_box_width (w
, -1);
727 /* Optimize the case that only the height has changed (C-x 2,
728 upper window). Invalidate all rows that are no longer part
730 if (!marginal_areas_changed_p
731 && !header_line_changed_p
733 && dim
.width
== matrix
->matrix_w
734 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
735 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
736 && matrix
->window_width
== window_width
)
738 /* Find the last row in the window. */
739 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
740 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
746 /* Window end is invalid, if inside of the rows that
747 are invalidated below. */
748 if (INTEGERP (w
->window_end_vpos
)
749 && XFASTINT (w
->window_end_vpos
) >= i
)
750 w
->window_end_valid
= Qnil
;
752 while (i
< matrix
->nrows
)
753 matrix
->rows
[i
++].enabled_p
= 0;
757 for (i
= 0; i
< matrix
->nrows
; ++i
)
758 matrix
->rows
[i
].enabled_p
= 0;
761 else if (matrix
== w
->desired_matrix
)
763 /* Rows in desired matrices always have to be cleared;
764 redisplay expects this is the case when it runs, so it
765 had better be the case when we adjust matrices between
767 for (i
= 0; i
< matrix
->nrows
; ++i
)
768 matrix
->rows
[i
].enabled_p
= 0;
773 /* Remember last values to be able to optimize frame redraws. */
774 matrix
->matrix_x
= x
;
775 matrix
->matrix_y
= y
;
776 matrix
->matrix_w
= dim
.width
;
777 matrix
->matrix_h
= dim
.height
;
779 /* Record the top y location and height of W at the time the matrix
780 was last adjusted. This is used to optimize redisplay above. */
783 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
784 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
785 matrix
->window_height
= window_height
;
786 matrix
->window_width
= window_width
;
787 matrix
->window_vscroll
= w
->vscroll
;
792 /* Reverse the contents of rows in MATRIX between START and END. The
793 contents of the row at END - 1 end up at START, END - 2 at START +
794 1 etc. This is part of the implementation of rotate_matrix (see
798 reverse_rows (struct glyph_matrix
*matrix
, int start
, int end
)
802 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
804 /* Non-ISO HP/UX compiler doesn't like auto struct
806 struct glyph_row temp
;
807 temp
= matrix
->rows
[i
];
808 matrix
->rows
[i
] = matrix
->rows
[j
];
809 matrix
->rows
[j
] = temp
;
814 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
815 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
816 indices. (Note: this does not copy glyphs, only glyph pointers in
817 row structures are moved around).
819 The algorithm used for rotating the vector was, I believe, first
820 described by Kernighan. See the vector R as consisting of two
821 sub-vectors AB, where A has length BY for BY >= 0. The result
822 after rotating is then BA. Reverse both sub-vectors to get ArBr
823 and reverse the result to get (ArBr)r which is BA. Similar for
827 rotate_matrix (struct glyph_matrix
*matrix
, int first
, int last
, int by
)
831 /* Up (rotate left, i.e. towards lower indices). */
833 reverse_rows (matrix
, first
, first
+ by
);
834 reverse_rows (matrix
, first
+ by
, last
);
835 reverse_rows (matrix
, first
, last
);
839 /* Down (rotate right, i.e. towards higher indices). */
840 reverse_rows (matrix
, last
- by
, last
);
841 reverse_rows (matrix
, first
, last
- by
);
842 reverse_rows (matrix
, first
, last
);
847 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
848 with indices START <= index < END. Increment positions by DELTA/
852 increment_matrix_positions (struct glyph_matrix
*matrix
, int start
, int end
, int delta
, int delta_bytes
)
854 /* Check that START and END are reasonable values. */
855 xassert (start
>= 0 && start
<= matrix
->nrows
);
856 xassert (end
>= 0 && end
<= matrix
->nrows
);
857 xassert (start
<= end
);
859 for (; start
< end
; ++start
)
860 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
864 /* Enable a range of rows in glyph matrix MATRIX. START and END are
865 the row indices of the first and last + 1 row to enable. If
866 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
869 enable_glyph_matrix_rows (struct glyph_matrix
*matrix
, int start
, int end
, int enabled_p
)
871 xassert (start
<= end
);
872 xassert (start
>= 0 && start
< matrix
->nrows
);
873 xassert (end
>= 0 && end
<= matrix
->nrows
);
875 for (; start
< end
; ++start
)
876 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
882 This empties all rows in MATRIX by setting the enabled_p flag for
883 all rows of the matrix to zero. The function prepare_desired_row
884 will eventually really clear a row when it sees one with a zero
887 Resets update hints to defaults value. The only update hint
888 currently present is the flag MATRIX->no_scrolling_p. */
891 clear_glyph_matrix (struct glyph_matrix
*matrix
)
895 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
896 matrix
->no_scrolling_p
= 0;
901 /* Shift part of the glyph matrix MATRIX of window W up or down.
902 Increment y-positions in glyph rows between START and END by DY,
903 and recompute their visible height. */
906 shift_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int start
, int end
, int dy
)
910 xassert (start
<= end
);
911 xassert (start
>= 0 && start
< matrix
->nrows
);
912 xassert (end
>= 0 && end
<= matrix
->nrows
);
914 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
915 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
917 for (; start
< end
; ++start
)
919 struct glyph_row
*row
= &matrix
->rows
[start
];
922 row
->visible_height
= row
->height
;
925 row
->visible_height
-= min_y
- row
->y
;
926 if (row
->y
+ row
->height
> max_y
)
927 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
932 /* Mark all rows in current matrices of frame F as invalid. Marking
933 invalid is done by setting enabled_p to zero for all rows in a
937 clear_current_matrices (register struct frame
*f
)
939 /* Clear frame current matrix, if we have one. */
940 if (f
->current_matrix
)
941 clear_glyph_matrix (f
->current_matrix
);
943 /* Clear the matrix of the menu bar window, if such a window exists.
944 The menu bar window is currently used to display menus on X when
945 no toolkit support is compiled in. */
946 if (WINDOWP (f
->menu_bar_window
))
947 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
949 /* Clear the matrix of the tool-bar window, if any. */
950 if (WINDOWP (f
->tool_bar_window
))
951 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
953 /* Clear current window matrices. */
954 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
955 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
959 /* Clear out all display lines of F for a coming redisplay. */
962 clear_desired_matrices (register struct frame
*f
)
964 if (f
->desired_matrix
)
965 clear_glyph_matrix (f
->desired_matrix
);
967 if (WINDOWP (f
->menu_bar_window
))
968 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
970 if (WINDOWP (f
->tool_bar_window
))
971 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
973 /* Do it for window matrices. */
974 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
975 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
979 /* Clear matrices in window tree rooted in W. If DESIRED_P is
980 non-zero clear desired matrices, otherwise clear current matrices. */
983 clear_window_matrices (struct window
*w
, int desired_p
)
987 if (!NILP (w
->hchild
))
989 xassert (WINDOWP (w
->hchild
));
990 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
992 else if (!NILP (w
->vchild
))
994 xassert (WINDOWP (w
->vchild
));
995 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1000 clear_glyph_matrix (w
->desired_matrix
);
1003 clear_glyph_matrix (w
->current_matrix
);
1004 w
->window_end_valid
= Qnil
;
1008 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1014 /***********************************************************************
1017 See dispextern.h for an overall explanation of glyph rows.
1018 ***********************************************************************/
1020 /* Clear glyph row ROW. Do it in a way that makes it robust against
1021 changes in the glyph_row structure, i.e. addition or removal of
1022 structure members. */
1024 static struct glyph_row null_row
;
1027 clear_glyph_row (struct glyph_row
*row
)
1029 struct glyph
*p
[1 + LAST_AREA
];
1031 /* Save pointers. */
1032 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1033 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1034 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1035 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1040 /* Restore pointers. */
1041 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1042 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1043 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1044 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1046 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1047 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1048 Redisplay outputs such glyphs, and flickering effects were
1049 the result. This also depended on the contents of memory
1050 returned by xmalloc. If flickering happens again, activate
1051 the code below. If the flickering is gone with that, chances
1052 are that the flickering has the same reason as here. */
1053 memset (p
[0], 0, (char *) p
[LAST_AREA
] - (char *) p
[0]);
1058 /* Make ROW an empty, enabled row of canonical character height,
1059 in window W starting at y-position Y. */
1062 blank_row (struct window
*w
, struct glyph_row
*row
, int y
)
1066 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1067 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1069 clear_glyph_row (row
);
1071 row
->ascent
= row
->phys_ascent
= 0;
1072 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1073 row
->visible_height
= row
->height
;
1076 row
->visible_height
-= min_y
- row
->y
;
1077 if (row
->y
+ row
->height
> max_y
)
1078 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1084 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1085 are the amounts by which to change positions. Note that the first
1086 glyph of the text area of a row can have a buffer position even if
1087 the used count of the text area is zero. Such rows display line
1091 increment_row_positions (struct glyph_row
*row
, int delta
, int delta_bytes
)
1095 /* Increment start and end positions. */
1096 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1097 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1098 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1099 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1100 CHARPOS (row
->start
.pos
) += delta
;
1101 BYTEPOS (row
->start
.pos
) += delta_bytes
;
1102 CHARPOS (row
->end
.pos
) += delta
;
1103 BYTEPOS (row
->end
.pos
) += delta_bytes
;
1105 if (!row
->enabled_p
)
1108 /* Increment positions in glyphs. */
1109 for (area
= 0; area
< LAST_AREA
; ++area
)
1110 for (i
= 0; i
< row
->used
[area
]; ++i
)
1111 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1112 && row
->glyphs
[area
][i
].charpos
> 0)
1113 row
->glyphs
[area
][i
].charpos
+= delta
;
1115 /* Capture the case of rows displaying a line end. */
1116 if (row
->used
[TEXT_AREA
] == 0
1117 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1118 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1123 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1124 contents, i.e. glyph structure contents are exchanged between A and
1125 B without changing glyph pointers in A and B. */
1128 swap_glyphs_in_rows (a
, b
)
1129 struct glyph_row
*a
, *b
;
1133 for (area
= 0; area
< LAST_AREA
; ++area
)
1135 /* Number of glyphs to swap. */
1136 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1138 /* Start of glyphs in area of row A. */
1139 struct glyph
*glyph_a
= a
->glyphs
[area
];
1141 /* End + 1 of glyphs in area of row A. */
1142 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1144 /* Start of glyphs in area of row B. */
1145 struct glyph
*glyph_b
= b
->glyphs
[area
];
1147 while (glyph_a
< glyph_a_end
)
1149 /* Non-ISO HP/UX compiler doesn't like auto struct
1153 *glyph_a
= *glyph_b
;
1163 /* Exchange pointers to glyph memory between glyph rows A and B. */
1166 swap_glyph_pointers (struct glyph_row
*a
, struct glyph_row
*b
)
1169 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1171 struct glyph
*temp
= a
->glyphs
[i
];
1172 a
->glyphs
[i
] = b
->glyphs
[i
];
1173 b
->glyphs
[i
] = temp
;
1178 /* Copy glyph row structure FROM to glyph row structure TO, except
1179 that glyph pointers in the structures are left unchanged. */
1182 copy_row_except_pointers (struct glyph_row
*to
, struct glyph_row
*from
)
1184 struct glyph
*pointers
[1 + LAST_AREA
];
1186 /* Save glyph pointers of TO. */
1187 memcpy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1189 /* Do a structure assignment. */
1192 /* Restore original pointers of TO. */
1193 memcpy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1197 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1198 TO and FROM are left unchanged. Glyph contents are copied from the
1199 glyph memory of FROM to the glyph memory of TO. Increment buffer
1200 positions in row TO by DELTA/ DELTA_BYTES. */
1203 copy_glyph_row_contents (struct glyph_row
*to
, struct glyph_row
*from
, int delta
, int delta_bytes
)
1207 /* This is like a structure assignment TO = FROM, except that
1208 glyph pointers in the rows are left unchanged. */
1209 copy_row_except_pointers (to
, from
);
1211 /* Copy glyphs from FROM to TO. */
1212 for (area
= 0; area
< LAST_AREA
; ++area
)
1213 if (from
->used
[area
])
1214 memcpy (to
->glyphs
[area
], from
->glyphs
[area
],
1215 from
->used
[area
] * sizeof (struct glyph
));
1217 /* Increment buffer positions in TO by DELTA. */
1218 increment_row_positions (to
, delta
, delta_bytes
);
1222 /* Assign glyph row FROM to glyph row TO. This works like a structure
1223 assignment TO = FROM, except that glyph pointers are not copied but
1224 exchanged between TO and FROM. Pointers must be exchanged to avoid
1228 assign_row (struct glyph_row
*to
, struct glyph_row
*from
)
1230 swap_glyph_pointers (to
, from
);
1231 copy_row_except_pointers (to
, from
);
1235 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1236 a row in a window matrix, is a slice of the glyph memory of the
1237 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1238 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1239 memory of FRAME_ROW. */
1244 glyph_row_slice_p (window_row
, frame_row
)
1245 struct glyph_row
*window_row
, *frame_row
;
1247 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1248 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1249 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1251 return (frame_glyph_start
<= window_glyph_start
1252 && window_glyph_start
< frame_glyph_end
);
1255 #endif /* GLYPH_DEBUG */
1259 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1260 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1261 in WINDOW_MATRIX is found satisfying the condition. */
1263 static struct glyph_row
*
1264 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1265 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1270 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1272 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1273 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1274 frame_matrix
->rows
+ row
))
1277 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1282 /* Prepare ROW for display. Desired rows are cleared lazily,
1283 i.e. they are only marked as to be cleared by setting their
1284 enabled_p flag to zero. When a row is to be displayed, a prior
1285 call to this function really clears it. */
1288 prepare_desired_row (struct glyph_row
*row
)
1290 if (!row
->enabled_p
)
1292 unsigned rp
= row
->reversed_p
;
1294 clear_glyph_row (row
);
1296 row
->reversed_p
= rp
;
1301 /* Return a hash code for glyph row ROW. */
1304 line_hash_code (struct glyph_row
*row
)
1310 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1311 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1315 int c
= glyph
->u
.ch
;
1316 int face_id
= glyph
->face_id
;
1317 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1319 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1320 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1332 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1333 the number of characters in the line. If must_write_spaces is
1334 zero, leading and trailing spaces are ignored. */
1337 line_draw_cost (struct glyph_matrix
*matrix
, int vpos
)
1339 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1340 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1341 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1343 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1344 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1346 /* Ignore trailing and leading spaces if we can. */
1347 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1349 /* Skip from the end over trailing spaces. */
1350 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1353 /* All blank line. */
1357 /* Skip over leading spaces. */
1358 while (CHAR_GLYPH_SPACE_P (*beg
))
1362 /* If we don't have a glyph-table, each glyph is one character,
1363 so return the number of glyphs. */
1364 if (glyph_table_base
== 0)
1368 /* Otherwise, scan the glyphs and accumulate their total length
1375 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1377 if (GLYPH_INVALID_P (g
)
1378 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1381 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1391 /* Test two glyph rows A and B for equality. Value is non-zero if A
1392 and B have equal contents. W is the window to which the glyphs
1393 rows A and B belong. It is needed here to test for partial row
1394 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1395 flags of A and B, too. */
1398 row_equal_p (struct window
*w
, struct glyph_row
*a
, struct glyph_row
*b
, int mouse_face_p
)
1402 else if (a
->hash
!= b
->hash
)
1406 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1409 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1412 /* Compare glyphs. */
1413 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1415 if (a
->used
[area
] != b
->used
[area
])
1418 a_glyph
= a
->glyphs
[area
];
1419 a_end
= a_glyph
+ a
->used
[area
];
1420 b_glyph
= b
->glyphs
[area
];
1422 while (a_glyph
< a_end
1423 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1424 ++a_glyph
, ++b_glyph
;
1426 if (a_glyph
!= a_end
)
1430 if (a
->fill_line_p
!= b
->fill_line_p
1431 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1432 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1433 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1434 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1435 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1436 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1437 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1438 || a
->overlapped_p
!= b
->overlapped_p
1439 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1440 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1441 || a
->reversed_p
!= b
->reversed_p
1442 /* Different partially visible characters on left margin. */
1444 /* Different height. */
1445 || a
->ascent
!= b
->ascent
1446 || a
->phys_ascent
!= b
->phys_ascent
1447 || a
->phys_height
!= b
->phys_height
1448 || a
->visible_height
!= b
->visible_height
)
1457 /***********************************************************************
1460 See dispextern.h for an overall explanation of glyph pools.
1461 ***********************************************************************/
1463 /* Allocate a glyph_pool structure. The structure returned is
1464 initialized with zeros. The global variable glyph_pool_count is
1465 incremented for each pool allocated. */
1467 static struct glyph_pool
*
1468 new_glyph_pool (void)
1470 struct glyph_pool
*result
;
1472 /* Allocate a new glyph_pool and clear it. */
1473 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1474 memset (result
, 0, sizeof *result
);
1476 /* For memory leak and double deletion checking. */
1483 /* Free a glyph_pool structure POOL. The function may be called with
1484 a null POOL pointer. The global variable glyph_pool_count is
1485 decremented with every pool structure freed. If this count gets
1486 negative, more structures were freed than allocated, i.e. one
1487 structure must have been freed more than once or a bogus pointer
1488 was passed to free_glyph_pool. */
1491 free_glyph_pool (struct glyph_pool
*pool
)
1495 /* More freed than allocated? */
1497 xassert (glyph_pool_count
>= 0);
1499 xfree (pool
->glyphs
);
1505 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1506 columns we need. This function never shrinks a pool. The only
1507 case in which this would make sense, would be when a frame's size
1508 is changed from a large value to a smaller one. But, if someone
1509 does it once, we can expect that he will do it again.
1511 Value is non-zero if the pool changed in a way which makes
1512 re-adjusting window glyph matrices necessary. */
1515 realloc_glyph_pool (struct glyph_pool
*pool
, struct dim matrix_dim
)
1520 changed_p
= (pool
->glyphs
== 0
1521 || matrix_dim
.height
!= pool
->nrows
1522 || matrix_dim
.width
!= pool
->ncolumns
);
1524 /* Enlarge the glyph pool. */
1525 needed
= matrix_dim
.width
* matrix_dim
.height
;
1526 if (needed
> pool
->nglyphs
)
1528 int size
= needed
* sizeof (struct glyph
);
1531 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1534 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1535 memset (pool
->glyphs
, 0, size
);
1538 pool
->nglyphs
= needed
;
1541 /* Remember the number of rows and columns because (a) we use them
1542 to do sanity checks, and (b) the number of columns determines
1543 where rows in the frame matrix start---this must be available to
1544 determine pointers to rows of window sub-matrices. */
1545 pool
->nrows
= matrix_dim
.height
;
1546 pool
->ncolumns
= matrix_dim
.width
;
1553 /***********************************************************************
1555 ***********************************************************************/
1560 /* Flush standard output. This is sometimes useful to call from the debugger.
1561 XXX Maybe this should be changed to flush the current terminal instead of
1572 /* Check that no glyph pointers have been lost in MATRIX. If a
1573 pointer has been lost, e.g. by using a structure assignment between
1574 rows, at least one pointer must occur more than once in the rows of
1578 check_matrix_pointer_lossage (matrix
)
1579 struct glyph_matrix
*matrix
;
1583 for (i
= 0; i
< matrix
->nrows
; ++i
)
1584 for (j
= 0; j
< matrix
->nrows
; ++j
)
1586 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1587 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1591 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1594 matrix_row (matrix
, row
)
1595 struct glyph_matrix
*matrix
;
1598 xassert (matrix
&& matrix
->rows
);
1599 xassert (row
>= 0 && row
< matrix
->nrows
);
1601 /* That's really too slow for normal testing because this function
1602 is called almost everywhere. Although---it's still astonishingly
1603 fast, so it is valuable to have for debugging purposes. */
1605 check_matrix_pointer_lossage (matrix
);
1608 return matrix
->rows
+ row
;
1612 #if 0 /* This function makes invalid assumptions when text is
1613 partially invisible. But it might come handy for debugging
1616 /* Check invariants that must hold for an up to date current matrix of
1620 check_matrix_invariants (w
)
1623 struct glyph_matrix
*matrix
= w
->current_matrix
;
1624 int yb
= window_text_bottom_y (w
);
1625 struct glyph_row
*row
= matrix
->rows
;
1626 struct glyph_row
*last_text_row
= NULL
;
1627 struct buffer
*saved
= current_buffer
;
1628 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1631 /* This can sometimes happen for a fresh window. */
1632 if (matrix
->nrows
< 2)
1635 set_buffer_temp (buffer
);
1637 /* Note: last row is always reserved for the mode line. */
1638 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1639 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1641 struct glyph_row
*next
= row
+ 1;
1643 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1644 last_text_row
= row
;
1646 /* Check that character and byte positions are in sync. */
1647 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1648 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1649 xassert (BYTEPOS (row
->start
.pos
)
1650 == CHAR_TO_BYTE (CHARPOS (row
->start
.pos
)));
1652 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1653 have such a position temporarily in case of a minibuffer
1654 displaying something like `[Sole completion]' at its end. */
1655 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1657 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1658 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1659 xassert (BYTEPOS (row
->end
.pos
)
1660 == CHAR_TO_BYTE (CHARPOS (row
->end
.pos
)));
1663 /* Check that end position of `row' is equal to start position
1665 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1667 xassert (MATRIX_ROW_END_CHARPOS (row
)
1668 == MATRIX_ROW_START_CHARPOS (next
));
1669 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1670 == MATRIX_ROW_START_BYTEPOS (next
));
1671 xassert (CHARPOS (row
->end
.pos
) == CHARPOS (next
->start
.pos
));
1672 xassert (BYTEPOS (row
->end
.pos
) == BYTEPOS (next
->start
.pos
));
1677 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1678 xassert (w
->desired_matrix
->rows
!= NULL
);
1679 set_buffer_temp (saved
);
1684 #endif /* GLYPH_DEBUG != 0 */
1688 /**********************************************************************
1689 Allocating/ Adjusting Glyph Matrices
1690 **********************************************************************/
1692 /* Allocate glyph matrices over a window tree for a frame-based
1695 X and Y are column/row within the frame glyph matrix where
1696 sub-matrices for the window tree rooted at WINDOW must be
1697 allocated. DIM_ONLY_P non-zero means that the caller of this
1698 function is only interested in the result matrix dimension, and
1699 matrix adjustments should not be performed.
1701 The function returns the total width/height of the sub-matrices of
1702 the window tree. If called on a frame root window, the computation
1703 will take the mini-buffer window into account.
1705 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1707 NEW_LEAF_MATRIX set if any window in the tree did not have a
1708 glyph matrices yet, and
1710 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1711 any window in the tree will be changed or have been changed (see
1714 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1717 Windows are arranged into chains of windows on the same level
1718 through the next fields of window structures. Such a level can be
1719 either a sequence of horizontally adjacent windows from left to
1720 right, or a sequence of vertically adjacent windows from top to
1721 bottom. Each window in a horizontal sequence can be either a leaf
1722 window or a vertical sequence; a window in a vertical sequence can
1723 be either a leaf or a horizontal sequence. All windows in a
1724 horizontal sequence have the same height, and all windows in a
1725 vertical sequence have the same width.
1727 This function uses, for historical reasons, a more general
1728 algorithm to determine glyph matrix dimensions that would be
1731 The matrix height of a horizontal sequence is determined by the
1732 maximum height of any matrix in the sequence. The matrix width of
1733 a horizontal sequence is computed by adding up matrix widths of
1734 windows in the sequence.
1736 |<------- result width ------->|
1737 +---------+----------+---------+ ---
1740 +---------+ | | result height
1745 The matrix width of a vertical sequence is the maximum matrix width
1746 of any window in the sequence. Its height is computed by adding up
1747 matrix heights of windows in the sequence.
1749 |<---- result width -->|
1757 +------------+---------+ |
1760 +------------+---------+ --- */
1762 /* Bit indicating that a new matrix will be allocated or has been
1765 #define NEW_LEAF_MATRIX (1 << 0)
1767 /* Bit indicating that a matrix will or has changed its location or
1770 #define CHANGED_LEAF_MATRIX (1 << 1)
1773 allocate_matrices_for_frame_redisplay (Lisp_Object window
, int x
, int y
,
1774 int dim_only_p
, int *window_change_flags
)
1776 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1778 int wmax
= 0, hmax
= 0;
1782 int in_horz_combination_p
;
1784 /* What combination is WINDOW part of? Compute this once since the
1785 result is the same for all windows in the `next' chain. The
1786 special case of a root window (parent equal to nil) is treated
1787 like a vertical combination because a root window's `next'
1788 points to the mini-buffer window, if any, which is arranged
1789 vertically below other windows. */
1790 in_horz_combination_p
1791 = (!NILP (XWINDOW (window
)->parent
)
1792 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1794 /* For WINDOW and all windows on the same level. */
1797 w
= XWINDOW (window
);
1799 /* Get the dimension of the window sub-matrix for W, depending
1800 on whether this is a combination or a leaf window. */
1801 if (!NILP (w
->hchild
))
1802 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1804 window_change_flags
);
1805 else if (!NILP (w
->vchild
))
1806 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1808 window_change_flags
);
1811 /* If not already done, allocate sub-matrix structures. */
1812 if (w
->desired_matrix
== NULL
)
1814 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1815 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1816 *window_change_flags
|= NEW_LEAF_MATRIX
;
1819 /* Width and height MUST be chosen so that there are no
1820 holes in the frame matrix. */
1821 dim
.width
= required_matrix_width (w
);
1822 dim
.height
= required_matrix_height (w
);
1824 /* Will matrix be re-allocated? */
1825 if (x
!= w
->desired_matrix
->matrix_x
1826 || y
!= w
->desired_matrix
->matrix_y
1827 || dim
.width
!= w
->desired_matrix
->matrix_w
1828 || dim
.height
!= w
->desired_matrix
->matrix_h
1829 || (margin_glyphs_to_reserve (w
, dim
.width
,
1830 w
->left_margin_cols
)
1831 != w
->desired_matrix
->left_margin_glyphs
)
1832 || (margin_glyphs_to_reserve (w
, dim
.width
,
1833 w
->right_margin_cols
)
1834 != w
->desired_matrix
->right_margin_glyphs
))
1835 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1837 /* Actually change matrices, if allowed. Do not consider
1838 CHANGED_LEAF_MATRIX computed above here because the pool
1839 may have been changed which we don't now here. We trust
1840 that we only will be called with DIM_ONLY_P != 0 when
1844 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1845 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1849 /* If we are part of a horizontal combination, advance x for
1850 windows to the right of W; otherwise advance y for windows
1852 if (in_horz_combination_p
)
1857 /* Remember maximum glyph matrix dimensions. */
1858 wmax
= max (wmax
, dim
.width
);
1859 hmax
= max (hmax
, dim
.height
);
1861 /* Next window on same level. */
1864 while (!NILP (window
));
1866 /* Set `total' to the total glyph matrix dimension of this window
1867 level. In a vertical combination, the width is the width of the
1868 widest window; the height is the y we finally reached, corrected
1869 by the y we started with. In a horizontal combination, the total
1870 height is the height of the tallest window, and the width is the
1871 x we finally reached, corrected by the x we started with. */
1872 if (in_horz_combination_p
)
1874 total
.width
= x
- x0
;
1875 total
.height
= hmax
;
1880 total
.height
= y
- y0
;
1887 /* Return the required height of glyph matrices for window W. */
1890 required_matrix_height (struct window
*w
)
1892 #ifdef HAVE_WINDOW_SYSTEM
1893 struct frame
*f
= XFRAME (w
->frame
);
1895 if (FRAME_WINDOW_P (f
))
1897 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1898 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
1899 return (((window_pixel_height
+ ch_height
- 1)
1900 / ch_height
) * w
->nrows_scale_factor
1901 /* One partially visible line at the top and
1902 bottom of the window. */
1904 /* 2 for header and mode line. */
1907 #endif /* HAVE_WINDOW_SYSTEM */
1909 return WINDOW_TOTAL_LINES (w
);
1913 /* Return the required width of glyph matrices for window W. */
1916 required_matrix_width (struct window
*w
)
1918 #ifdef HAVE_WINDOW_SYSTEM
1919 struct frame
*f
= XFRAME (w
->frame
);
1920 if (FRAME_WINDOW_P (f
))
1922 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
1923 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
1925 /* Compute number of glyphs needed in a glyph row. */
1926 return (((window_pixel_width
+ ch_width
- 1)
1927 / ch_width
) * w
->ncols_scale_factor
1928 /* 2 partially visible columns in the text area. */
1930 /* One partially visible column at the right
1931 edge of each marginal area. */
1934 #endif /* HAVE_WINDOW_SYSTEM */
1936 return XINT (w
->total_cols
);
1940 /* Allocate window matrices for window-based redisplay. W is the
1941 window whose matrices must be allocated/reallocated. */
1944 allocate_matrices_for_window_redisplay (struct window
*w
)
1948 if (!NILP (w
->vchild
))
1949 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
1950 else if (!NILP (w
->hchild
))
1951 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
1954 /* W is a leaf window. */
1957 /* If matrices are not yet allocated, allocate them now. */
1958 if (w
->desired_matrix
== NULL
)
1960 w
->desired_matrix
= new_glyph_matrix (NULL
);
1961 w
->current_matrix
= new_glyph_matrix (NULL
);
1964 dim
.width
= required_matrix_width (w
);
1965 dim
.height
= required_matrix_height (w
);
1966 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
1967 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
1970 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
1975 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
1976 do it for all frames; otherwise do it just for the given frame.
1977 This function must be called when a new frame is created, its size
1978 changes, or its window configuration changes. */
1981 adjust_glyphs (struct frame
*f
)
1983 /* Block input so that expose events and other events that access
1984 glyph matrices are not processed while we are changing them. */
1988 adjust_frame_glyphs (f
);
1991 Lisp_Object tail
, lisp_frame
;
1993 FOR_EACH_FRAME (tail
, lisp_frame
)
1994 adjust_frame_glyphs (XFRAME (lisp_frame
));
2001 /* Adjust frame glyphs when Emacs is initialized.
2003 To be called from init_display.
2005 We need a glyph matrix because redraw will happen soon.
2006 Unfortunately, window sizes on selected_frame are not yet set to
2007 meaningful values. I believe we can assume that there are only two
2008 windows on the frame---the mini-buffer and the root window. Frame
2009 height and width seem to be correct so far. So, set the sizes of
2010 windows to estimated values. */
2013 adjust_frame_glyphs_initially (void)
2015 struct frame
*sf
= SELECTED_FRAME ();
2016 struct window
*root
= XWINDOW (sf
->root_window
);
2017 struct window
*mini
= XWINDOW (root
->next
);
2018 int frame_lines
= FRAME_LINES (sf
);
2019 int frame_cols
= FRAME_COLS (sf
);
2020 int top_margin
= FRAME_TOP_MARGIN (sf
);
2022 /* Do it for the root window. */
2023 XSETFASTINT (root
->top_line
, top_margin
);
2024 XSETFASTINT (root
->total_lines
, frame_lines
- 1 - top_margin
);
2025 XSETFASTINT (root
->total_cols
, frame_cols
);
2027 /* Do it for the mini-buffer window. */
2028 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2029 XSETFASTINT (mini
->total_lines
, 1);
2030 XSETFASTINT (mini
->total_cols
, frame_cols
);
2032 adjust_frame_glyphs (sf
);
2033 glyphs_initialized_initially_p
= 1;
2037 /* Allocate/reallocate glyph matrices of a single frame F. */
2040 adjust_frame_glyphs (struct frame
*f
)
2042 if (FRAME_WINDOW_P (f
))
2043 adjust_frame_glyphs_for_window_redisplay (f
);
2045 adjust_frame_glyphs_for_frame_redisplay (f
);
2047 /* Don't forget the message buffer and the buffer for
2048 decode_mode_spec. */
2049 adjust_frame_message_buffer (f
);
2050 adjust_decode_mode_spec_buffer (f
);
2052 f
->glyphs_initialized_p
= 1;
2055 /* Return 1 if any window in the tree has nonzero window margins. See
2056 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2058 showing_window_margins_p (struct window
*w
)
2062 if (!NILP (w
->hchild
))
2064 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2067 else if (!NILP (w
->vchild
))
2069 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2072 else if (!NILP (w
->left_margin_cols
)
2073 || !NILP (w
->right_margin_cols
))
2076 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2082 /* In the window tree with root W, build current matrices of leaf
2083 windows from the frame's current matrix. */
2086 fake_current_matrices (Lisp_Object window
)
2090 for (; !NILP (window
); window
= w
->next
)
2092 w
= XWINDOW (window
);
2094 if (!NILP (w
->hchild
))
2095 fake_current_matrices (w
->hchild
);
2096 else if (!NILP (w
->vchild
))
2097 fake_current_matrices (w
->vchild
);
2101 struct frame
*f
= XFRAME (w
->frame
);
2102 struct glyph_matrix
*m
= w
->current_matrix
;
2103 struct glyph_matrix
*fm
= f
->current_matrix
;
2105 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2106 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2108 for (i
= 0; i
< m
->matrix_h
; ++i
)
2110 struct glyph_row
*r
= m
->rows
+ i
;
2111 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2113 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2114 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2116 r
->enabled_p
= fr
->enabled_p
;
2119 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2120 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2121 r
->used
[TEXT_AREA
] = (m
->matrix_w
2122 - r
->used
[LEFT_MARGIN_AREA
]
2123 - r
->used
[RIGHT_MARGIN_AREA
]);
2132 /* Save away the contents of frame F's current frame matrix. Value is
2133 a glyph matrix holding the contents of F's current frame matrix. */
2135 static struct glyph_matrix
*
2136 save_current_matrix (struct frame
*f
)
2139 struct glyph_matrix
*saved
;
2141 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2142 memset (saved
, 0, sizeof *saved
);
2143 saved
->nrows
= f
->current_matrix
->nrows
;
2144 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2145 * sizeof *saved
->rows
);
2146 memset (saved
->rows
, 0, saved
->nrows
* sizeof *saved
->rows
);
2148 for (i
= 0; i
< saved
->nrows
; ++i
)
2150 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2151 struct glyph_row
*to
= saved
->rows
+ i
;
2152 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2153 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2154 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2155 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2162 /* Restore the contents of frame F's current frame matrix from SAVED,
2163 and free memory associated with SAVED. */
2166 restore_current_matrix (struct frame
*f
, struct glyph_matrix
*saved
)
2170 for (i
= 0; i
< saved
->nrows
; ++i
)
2172 struct glyph_row
*from
= saved
->rows
+ i
;
2173 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2174 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2175 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2176 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2177 xfree (from
->glyphs
[TEXT_AREA
]);
2180 xfree (saved
->rows
);
2186 /* Allocate/reallocate glyph matrices of a single frame F for
2187 frame-based redisplay. */
2190 adjust_frame_glyphs_for_frame_redisplay (struct frame
*f
)
2192 struct dim matrix_dim
;
2194 int window_change_flags
;
2197 if (!FRAME_LIVE_P (f
))
2200 top_window_y
= FRAME_TOP_MARGIN (f
);
2202 /* Allocate glyph pool structures if not already done. */
2203 if (f
->desired_pool
== NULL
)
2205 f
->desired_pool
= new_glyph_pool ();
2206 f
->current_pool
= new_glyph_pool ();
2209 /* Allocate frames matrix structures if needed. */
2210 if (f
->desired_matrix
== NULL
)
2212 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2213 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2216 /* Compute window glyph matrices. (This takes the mini-buffer
2217 window into account). The result is the size of the frame glyph
2218 matrix needed. The variable window_change_flags is set to a bit
2219 mask indicating whether new matrices will be allocated or
2220 existing matrices change their size or location within the frame
2222 window_change_flags
= 0;
2224 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2227 &window_change_flags
);
2229 /* Add in menu bar lines, if any. */
2230 matrix_dim
.height
+= top_window_y
;
2232 /* Enlarge pools as necessary. */
2233 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2234 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2236 /* Set up glyph pointers within window matrices. Do this only if
2237 absolutely necessary since it requires a frame redraw. */
2238 if (pool_changed_p
|| window_change_flags
)
2240 /* Do it for window matrices. */
2241 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2243 &window_change_flags
);
2245 /* Size of frame matrices must equal size of frame. Note
2246 that we are called for X frames with window widths NOT equal
2247 to the frame width (from CHANGE_FRAME_SIZE_1). */
2248 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2249 && matrix_dim
.height
== FRAME_LINES (f
));
2251 /* Pointers to glyph memory in glyph rows are exchanged during
2252 the update phase of redisplay, which means in general that a
2253 frame's current matrix consists of pointers into both the
2254 desired and current glyph pool of the frame. Adjusting a
2255 matrix sets the frame matrix up so that pointers are all into
2256 the same pool. If we want to preserve glyph contents of the
2257 current matrix over a call to adjust_glyph_matrix, we must
2258 make a copy of the current glyphs, and restore the current
2259 matrix' contents from that copy. */
2260 if (display_completed
2261 && !FRAME_GARBAGED_P (f
)
2262 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2263 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2264 /* For some reason, the frame glyph matrix gets corrupted if
2265 any of the windows contain margins. I haven't been able
2266 to hunt down the reason, but for the moment this prevents
2267 the problem from manifesting. -- cyd */
2268 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2270 struct glyph_matrix
*copy
= save_current_matrix (f
);
2271 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2272 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2273 restore_current_matrix (f
, copy
);
2274 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2278 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2279 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2280 SET_FRAME_GARBAGED (f
);
2286 /* Allocate/reallocate glyph matrices of a single frame F for
2287 window-based redisplay. */
2290 adjust_frame_glyphs_for_window_redisplay (struct frame
*f
)
2294 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2296 /* Allocate/reallocate window matrices. */
2297 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2299 #ifdef HAVE_X_WINDOWS
2300 /* Allocate/ reallocate matrices of the dummy window used to display
2301 the menu bar under X when no X toolkit support is available. */
2302 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2304 /* Allocate a dummy window if not already done. */
2305 if (NILP (f
->menu_bar_window
))
2307 f
->menu_bar_window
= make_window ();
2308 w
= XWINDOW (f
->menu_bar_window
);
2309 XSETFRAME (w
->frame
, f
);
2310 w
->pseudo_window_p
= 1;
2313 w
= XWINDOW (f
->menu_bar_window
);
2315 /* Set window dimensions to frame dimensions and allocate or
2316 adjust glyph matrices of W. */
2317 XSETFASTINT (w
->top_line
, 0);
2318 XSETFASTINT (w
->left_col
, 0);
2319 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2320 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2321 allocate_matrices_for_window_redisplay (w
);
2323 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2324 #endif /* HAVE_X_WINDOWS */
2327 /* Allocate/ reallocate matrices of the tool bar window. If we
2328 don't have a tool bar window yet, make one. */
2329 if (NILP (f
->tool_bar_window
))
2331 f
->tool_bar_window
= make_window ();
2332 w
= XWINDOW (f
->tool_bar_window
);
2333 XSETFRAME (w
->frame
, f
);
2334 w
->pseudo_window_p
= 1;
2337 w
= XWINDOW (f
->tool_bar_window
);
2339 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2340 XSETFASTINT (w
->left_col
, 0);
2341 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2342 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2343 allocate_matrices_for_window_redisplay (w
);
2348 /* Adjust/ allocate message buffer of frame F.
2350 Note that the message buffer is never freed. Since I could not
2351 find a free in 19.34, I assume that freeing it would be
2352 problematic in some way and don't do it either.
2354 (Implementation note: It should be checked if we can free it
2355 eventually without causing trouble). */
2358 adjust_frame_message_buffer (struct frame
*f
)
2360 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2362 if (FRAME_MESSAGE_BUF (f
))
2364 char *buffer
= FRAME_MESSAGE_BUF (f
);
2365 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2366 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2369 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2373 /* Re-allocate buffer for decode_mode_spec on frame F. */
2376 adjust_decode_mode_spec_buffer (struct frame
*f
)
2378 f
->decode_mode_spec_buffer
2379 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2380 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2385 /**********************************************************************
2386 Freeing Glyph Matrices
2387 **********************************************************************/
2389 /* Free glyph memory for a frame F. F may be null. This function can
2390 be called for the same frame more than once. The root window of
2391 F may be nil when this function is called. This is the case when
2392 the function is called when F is destroyed. */
2395 free_glyphs (struct frame
*f
)
2397 if (f
&& f
->glyphs_initialized_p
)
2399 /* Block interrupt input so that we don't get surprised by an X
2400 event while we're in an inconsistent state. */
2402 f
->glyphs_initialized_p
= 0;
2404 /* Release window sub-matrices. */
2405 if (!NILP (f
->root_window
))
2406 free_window_matrices (XWINDOW (f
->root_window
));
2408 /* Free the dummy window for menu bars without X toolkit and its
2410 if (!NILP (f
->menu_bar_window
))
2412 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2413 free_glyph_matrix (w
->desired_matrix
);
2414 free_glyph_matrix (w
->current_matrix
);
2415 w
->desired_matrix
= w
->current_matrix
= NULL
;
2416 f
->menu_bar_window
= Qnil
;
2419 /* Free the tool bar window and its glyph matrices. */
2420 if (!NILP (f
->tool_bar_window
))
2422 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2423 free_glyph_matrix (w
->desired_matrix
);
2424 free_glyph_matrix (w
->current_matrix
);
2425 w
->desired_matrix
= w
->current_matrix
= NULL
;
2426 f
->tool_bar_window
= Qnil
;
2429 /* Release frame glyph matrices. Reset fields to zero in
2430 case we are called a second time. */
2431 if (f
->desired_matrix
)
2433 free_glyph_matrix (f
->desired_matrix
);
2434 free_glyph_matrix (f
->current_matrix
);
2435 f
->desired_matrix
= f
->current_matrix
= NULL
;
2438 /* Release glyph pools. */
2439 if (f
->desired_pool
)
2441 free_glyph_pool (f
->desired_pool
);
2442 free_glyph_pool (f
->current_pool
);
2443 f
->desired_pool
= f
->current_pool
= NULL
;
2451 /* Free glyph sub-matrices in the window tree rooted at W. This
2452 function may be called with a null pointer, and it may be called on
2453 the same tree more than once. */
2456 free_window_matrices (struct window
*w
)
2460 if (!NILP (w
->hchild
))
2461 free_window_matrices (XWINDOW (w
->hchild
));
2462 else if (!NILP (w
->vchild
))
2463 free_window_matrices (XWINDOW (w
->vchild
));
2466 /* This is a leaf window. Free its memory and reset fields
2467 to zero in case this function is called a second time for
2469 free_glyph_matrix (w
->current_matrix
);
2470 free_glyph_matrix (w
->desired_matrix
);
2471 w
->current_matrix
= w
->desired_matrix
= NULL
;
2474 /* Next window on same level. */
2475 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2480 /* Check glyph memory leaks. This function is called from
2481 shut_down_emacs. Note that frames are not destroyed when Emacs
2482 exits. We therefore free all glyph memory for all active frames
2483 explicitly and check that nothing is left allocated. */
2486 check_glyph_memory (void)
2488 Lisp_Object tail
, frame
;
2490 /* Free glyph memory for all frames. */
2491 FOR_EACH_FRAME (tail
, frame
)
2492 free_glyphs (XFRAME (frame
));
2494 /* Check that nothing is left allocated. */
2495 if (glyph_matrix_count
)
2497 if (glyph_pool_count
)
2503 /**********************************************************************
2504 Building a Frame Matrix
2505 **********************************************************************/
2507 /* Most of the redisplay code works on glyph matrices attached to
2508 windows. This is a good solution most of the time, but it is not
2509 suitable for terminal code. Terminal output functions cannot rely
2510 on being able to set an arbitrary terminal window. Instead they
2511 must be provided with a view of the whole frame, i.e. the whole
2512 screen. We build such a view by constructing a frame matrix from
2513 window matrices in this section.
2515 Windows that must be updated have their must_be_update_p flag set.
2516 For all such windows, their desired matrix is made part of the
2517 desired frame matrix. For other windows, their current matrix is
2518 made part of the desired frame matrix.
2520 +-----------------+----------------+
2521 | desired | desired |
2523 +-----------------+----------------+
2526 +----------------------------------+
2528 Desired window matrices can be made part of the frame matrix in a
2529 cheap way: We exploit the fact that the desired frame matrix and
2530 desired window matrices share their glyph memory. This is not
2531 possible for current window matrices. Their glyphs are copied to
2532 the desired frame matrix. The latter is equivalent to
2533 preserve_other_columns in the old redisplay.
2535 Used glyphs counters for frame matrix rows are the result of adding
2536 up glyph lengths of the window matrices. A line in the frame
2537 matrix is enabled, if a corresponding line in a window matrix is
2540 After building the desired frame matrix, it will be passed to
2541 terminal code, which will manipulate both the desired and current
2542 frame matrix. Changes applied to the frame's current matrix have
2543 to be visible in current window matrices afterwards, of course.
2545 This problem is solved like this:
2547 1. Window and frame matrices share glyphs. Window matrices are
2548 constructed in a way that their glyph contents ARE the glyph
2549 contents needed in a frame matrix. Thus, any modification of
2550 glyphs done in terminal code will be reflected in window matrices
2553 2. Exchanges of rows in a frame matrix done by terminal code are
2554 intercepted by hook functions so that corresponding row operations
2555 on window matrices can be performed. This is necessary because we
2556 use pointers to glyphs in glyph row structures. To satisfy the
2557 assumption of point 1 above that glyphs are updated implicitly in
2558 window matrices when they are manipulated via the frame matrix,
2559 window and frame matrix must of course agree where to find the
2560 glyphs for their rows. Possible manipulations that must be
2561 mirrored are assignments of rows of the desired frame matrix to the
2562 current frame matrix and scrolling the current frame matrix. */
2564 /* Build frame F's desired matrix from window matrices. Only windows
2565 which have the flag must_be_updated_p set have to be updated. Menu
2566 bar lines of a frame are not covered by window matrices, so make
2567 sure not to touch them in this function. */
2570 build_frame_matrix (struct frame
*f
)
2574 /* F must have a frame matrix when this function is called. */
2575 xassert (!FRAME_WINDOW_P (f
));
2577 /* Clear all rows in the frame matrix covered by window matrices.
2578 Menu bar lines are not covered by windows. */
2579 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2580 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2582 /* Build the matrix by walking the window tree. */
2583 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2584 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2588 /* Walk a window tree, building a frame matrix MATRIX from window
2589 matrices. W is the root of a window tree. */
2592 build_frame_matrix_from_window_tree (struct glyph_matrix
*matrix
, struct window
*w
)
2596 if (!NILP (w
->hchild
))
2597 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2598 else if (!NILP (w
->vchild
))
2599 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2601 build_frame_matrix_from_leaf_window (matrix
, w
);
2603 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2608 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2609 desired frame matrix built. W is a leaf window whose desired or
2610 current matrix is to be added to FRAME_MATRIX. W's flag
2611 must_be_updated_p determines which matrix it contributes to
2612 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2613 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2614 Adding a desired matrix means setting up used counters and such in
2615 frame rows, while adding a current window matrix to FRAME_MATRIX
2616 means copying glyphs. The latter case corresponds to
2617 preserve_other_columns in the old redisplay. */
2620 build_frame_matrix_from_leaf_window (struct glyph_matrix
*frame_matrix
, struct window
*w
)
2622 struct glyph_matrix
*window_matrix
;
2623 int window_y
, frame_y
;
2624 /* If non-zero, a glyph to insert at the right border of W. */
2625 GLYPH right_border_glyph
;
2627 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2629 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2630 if (w
->must_be_updated_p
)
2632 window_matrix
= w
->desired_matrix
;
2634 /* Decide whether we want to add a vertical border glyph. */
2635 if (!WINDOW_RIGHTMOST_P (w
))
2637 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2640 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2642 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2643 && GLYPH_CODE_CHAR_VALID_P (gc
))
2645 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2646 spec_glyph_lookup_face (w
, &right_border_glyph
);
2649 if (GLYPH_FACE (right_border_glyph
) <= 0)
2650 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2654 window_matrix
= w
->current_matrix
;
2656 /* For all rows in the window matrix and corresponding rows in the
2659 frame_y
= window_matrix
->matrix_y
;
2660 while (window_y
< window_matrix
->nrows
)
2662 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2663 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2664 int current_row_p
= window_matrix
== w
->current_matrix
;
2666 /* Fill up the frame row with spaces up to the left margin of the
2668 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2670 /* Fill up areas in the window matrix row with spaces. */
2671 fill_up_glyph_row_with_spaces (window_row
);
2673 /* If only part of W's desired matrix has been built, and
2674 window_row wasn't displayed, use the corresponding current
2676 if (window_matrix
== w
->desired_matrix
2677 && !window_row
->enabled_p
)
2679 window_row
= w
->current_matrix
->rows
+ window_y
;
2685 /* Copy window row to frame row. */
2686 memcpy (frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2687 window_row
->glyphs
[0],
2688 window_matrix
->matrix_w
* sizeof (struct glyph
));
2692 xassert (window_row
->enabled_p
);
2694 /* Only when a desired row has been displayed, we want
2695 the corresponding frame row to be updated. */
2696 frame_row
->enabled_p
= 1;
2698 /* Maybe insert a vertical border between horizontally adjacent
2700 if (GLYPH_CHAR (right_border_glyph
) != 0)
2702 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2703 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2707 /* Window row window_y must be a slice of frame row
2709 xassert (glyph_row_slice_p (window_row
, frame_row
));
2711 /* If rows are in sync, we don't have to copy glyphs because
2712 frame and window share glyphs. */
2714 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2715 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2719 /* Set number of used glyphs in the frame matrix. Since we fill
2720 up with spaces, and visit leaf windows from left to right it
2721 can be done simply. */
2722 frame_row
->used
[TEXT_AREA
]
2723 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2731 /* Given a user-specified glyph, possibly including a Lisp-level face
2732 ID, return a glyph that has a realized face ID.
2733 This is used for glyphs displayed specially and not part of the text;
2734 for instance, vertical separators, truncation markers, etc. */
2737 spec_glyph_lookup_face (struct window
*w
, GLYPH
*glyph
)
2739 int lface_id
= GLYPH_FACE (*glyph
);
2740 /* Convert the glyph's specified face to a realized (cache) face. */
2743 int face_id
= merge_faces (XFRAME (w
->frame
),
2744 Qt
, lface_id
, DEFAULT_FACE_ID
);
2745 SET_GLYPH_FACE (*glyph
, face_id
);
2749 /* Add spaces to a glyph row ROW in a window matrix.
2751 Each row has the form:
2753 +---------+-----------------------------+------------+
2754 | left | text | right |
2755 +---------+-----------------------------+------------+
2757 Left and right marginal areas are optional. This function adds
2758 spaces to areas so that there are no empty holes between areas.
2759 In other words: If the right area is not empty, the text area
2760 is filled up with spaces up to the right area. If the text area
2761 is not empty, the left area is filled up.
2763 To be called for frame-based redisplay, only. */
2766 fill_up_glyph_row_with_spaces (struct glyph_row
*row
)
2768 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2769 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2770 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2774 /* Fill area AREA of glyph row ROW with spaces. To be called for
2775 frame-based redisplay only. */
2778 fill_up_glyph_row_area_with_spaces (struct glyph_row
*row
, int area
)
2780 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2782 struct glyph
*end
= row
->glyphs
[area
+ 1];
2783 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2786 *text
++ = space_glyph
;
2787 row
->used
[area
] = text
- row
->glyphs
[area
];
2792 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2793 reached. In frame matrices only one area, TEXT_AREA, is used. */
2796 fill_up_frame_row_with_spaces (struct glyph_row
*row
, int upto
)
2798 int i
= row
->used
[TEXT_AREA
];
2799 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2802 glyph
[i
++] = space_glyph
;
2804 row
->used
[TEXT_AREA
] = i
;
2809 /**********************************************************************
2810 Mirroring operations on frame matrices in window matrices
2811 **********************************************************************/
2813 /* Set frame being updated via frame-based redisplay to F. This
2814 function must be called before updates to make explicit that we are
2815 working on frame matrices or not. */
2818 set_frame_matrix_frame (struct frame
*f
)
2820 frame_matrix_frame
= f
;
2824 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2825 DESIRED_MATRIX is the desired matrix corresponding to
2826 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2827 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2828 frame_matrix_frame is non-null, this indicates that the exchange is
2829 done in frame matrices, and that we have to perform analogous
2830 operations in window matrices of frame_matrix_frame. */
2833 make_current (struct glyph_matrix
*desired_matrix
, struct glyph_matrix
*current_matrix
, int row
)
2835 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2836 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2837 int mouse_face_p
= current_row
->mouse_face_p
;
2839 /* Do current_row = desired_row. This exchanges glyph pointers
2840 between both rows, and does a structure assignment otherwise. */
2841 assign_row (current_row
, desired_row
);
2843 /* Enable current_row to mark it as valid. */
2844 current_row
->enabled_p
= 1;
2845 current_row
->mouse_face_p
= mouse_face_p
;
2847 /* If we are called on frame matrices, perform analogous operations
2848 for window matrices. */
2849 if (frame_matrix_frame
)
2850 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2854 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2855 W's frame which has been made current (by swapping pointers between
2856 current and desired matrix). Perform analogous operations in the
2857 matrices of leaf windows in the window tree rooted at W. */
2860 mirror_make_current (struct window
*w
, int frame_row
)
2864 if (!NILP (w
->hchild
))
2865 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2866 else if (!NILP (w
->vchild
))
2867 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2870 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2871 here because the checks performed in debug mode there
2872 will not allow the conversion. */
2873 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2875 /* If FRAME_ROW is within W, assign the desired row to the
2876 current row (exchanging glyph pointers). */
2877 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2879 struct glyph_row
*current_row
2880 = MATRIX_ROW (w
->current_matrix
, row
);
2881 struct glyph_row
*desired_row
2882 = MATRIX_ROW (w
->desired_matrix
, row
);
2884 if (desired_row
->enabled_p
)
2885 assign_row (current_row
, desired_row
);
2887 swap_glyph_pointers (desired_row
, current_row
);
2888 current_row
->enabled_p
= 1;
2892 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2897 /* Perform row dance after scrolling. We are working on the range of
2898 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2899 including) in MATRIX. COPY_FROM is a vector containing, for each
2900 row I in the range 0 <= I < NLINES, the index of the original line
2901 to move to I. This index is relative to the row range, i.e. 0 <=
2902 index < NLINES. RETAINED_P is a vector containing zero for each
2903 row 0 <= I < NLINES which is empty.
2905 This function is called from do_scrolling and do_direct_scrolling. */
2908 mirrored_line_dance (struct glyph_matrix
*matrix
, int unchanged_at_top
, int nlines
,
2909 int *copy_from
, char *retained_p
)
2911 /* A copy of original rows. */
2912 struct glyph_row
*old_rows
;
2914 /* Rows to assign to. */
2915 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2919 /* Make a copy of the original rows. */
2920 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2921 memcpy (old_rows
, new_rows
, nlines
* sizeof *old_rows
);
2923 /* Assign new rows, maybe clear lines. */
2924 for (i
= 0; i
< nlines
; ++i
)
2926 int enabled_before_p
= new_rows
[i
].enabled_p
;
2928 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2929 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2930 new_rows
[i
] = old_rows
[copy_from
[i
]];
2931 new_rows
[i
].enabled_p
= enabled_before_p
;
2933 /* RETAINED_P is zero for empty lines. */
2934 if (!retained_p
[copy_from
[i
]])
2935 new_rows
[i
].enabled_p
= 0;
2938 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2939 if (frame_matrix_frame
)
2940 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2941 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2945 /* Synchronize glyph pointers in the current matrix of window W with
2946 the current frame matrix. */
2949 sync_window_with_frame_matrix_rows (struct window
*w
)
2951 struct frame
*f
= XFRAME (w
->frame
);
2952 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2953 int left
, right
, x
, width
;
2955 /* Preconditions: W must be a leaf window on a tty frame. */
2956 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2957 xassert (!FRAME_WINDOW_P (f
));
2959 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
2960 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
2961 x
= w
->current_matrix
->matrix_x
;
2962 width
= w
->current_matrix
->matrix_w
;
2964 window_row
= w
->current_matrix
->rows
;
2965 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
2966 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
2968 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
2970 window_row
->glyphs
[LEFT_MARGIN_AREA
]
2971 = frame_row
->glyphs
[0] + x
;
2972 window_row
->glyphs
[TEXT_AREA
]
2973 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
2974 window_row
->glyphs
[LAST_AREA
]
2975 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
2976 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
2977 = window_row
->glyphs
[LAST_AREA
] - right
;
2982 /* Return the window in the window tree rooted in W containing frame
2983 row ROW. Value is null if none is found. */
2986 frame_row_to_window (struct window
*w
, int row
)
2988 struct window
*found
= NULL
;
2992 if (!NILP (w
->hchild
))
2993 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
2994 else if (!NILP (w
->vchild
))
2995 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
2996 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
2997 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3000 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3007 /* Perform a line dance in the window tree rooted at W, after
3008 scrolling a frame matrix in mirrored_line_dance.
3010 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3011 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3012 COPY_FROM is a vector containing, for each row I in the range 0 <=
3013 I < NLINES, the index of the original line to move to I. This
3014 index is relative to the row range, i.e. 0 <= index < NLINES.
3015 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3019 mirror_line_dance (struct window
*w
, int unchanged_at_top
, int nlines
, int *copy_from
, char *retained_p
)
3023 if (!NILP (w
->hchild
))
3024 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3025 nlines
, copy_from
, retained_p
);
3026 else if (!NILP (w
->vchild
))
3027 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3028 nlines
, copy_from
, retained_p
);
3031 /* W is a leaf window, and we are working on its current
3033 struct glyph_matrix
*m
= w
->current_matrix
;
3035 struct glyph_row
*old_rows
;
3037 /* Make a copy of the original rows of matrix m. */
3038 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3039 memcpy (old_rows
, m
->rows
, m
->nrows
* sizeof *old_rows
);
3041 for (i
= 0; i
< nlines
; ++i
)
3043 /* Frame relative line assigned to. */
3044 int frame_to
= i
+ unchanged_at_top
;
3046 /* Frame relative line assigned. */
3047 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3049 /* Window relative line assigned to. */
3050 int window_to
= frame_to
- m
->matrix_y
;
3052 /* Window relative line assigned. */
3053 int window_from
= frame_from
- m
->matrix_y
;
3055 /* Is assigned line inside window? */
3056 int from_inside_window_p
3057 = window_from
>= 0 && window_from
< m
->matrix_h
;
3059 /* Is assigned to line inside window? */
3060 int to_inside_window_p
3061 = window_to
>= 0 && window_to
< m
->matrix_h
;
3063 if (from_inside_window_p
&& to_inside_window_p
)
3065 /* Enabled setting before assignment. */
3066 int enabled_before_p
;
3068 /* Do the assignment. The enabled_p flag is saved
3069 over the assignment because the old redisplay did
3071 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3072 m
->rows
[window_to
] = old_rows
[window_from
];
3073 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3075 /* If frame line is empty, window line is empty, too. */
3076 if (!retained_p
[copy_from
[i
]])
3077 m
->rows
[window_to
].enabled_p
= 0;
3079 else if (to_inside_window_p
)
3081 /* A copy between windows. This is an infrequent
3082 case not worth optimizing. */
3083 struct frame
*f
= XFRAME (w
->frame
);
3084 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3086 struct glyph_matrix
*m2
;
3089 w2
= frame_row_to_window (root
, frame_from
);
3090 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3091 -nw', FROM_FRAME sometimes has no associated window.
3092 This check avoids a segfault if W2 is null. */
3095 m2
= w2
->current_matrix
;
3096 m2_from
= frame_from
- m2
->matrix_y
;
3097 copy_row_except_pointers (m
->rows
+ window_to
,
3098 m2
->rows
+ m2_from
);
3100 /* If frame line is empty, window line is empty, too. */
3101 if (!retained_p
[copy_from
[i
]])
3102 m
->rows
[window_to
].enabled_p
= 0;
3106 else if (from_inside_window_p
)
3110 /* If there was a copy between windows, make sure glyph
3111 pointers are in sync with the frame matrix. */
3113 sync_window_with_frame_matrix_rows (w
);
3115 /* Check that no pointers are lost. */
3119 /* Next window on same level. */
3120 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3127 /* Check that window and frame matrices agree about their
3128 understanding where glyphs of the rows are to find. For each
3129 window in the window tree rooted at W, check that rows in the
3130 matrices of leaf window agree with their frame matrices about
3134 check_window_matrix_pointers (w
)
3139 if (!NILP (w
->hchild
))
3140 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3141 else if (!NILP (w
->vchild
))
3142 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3145 struct frame
*f
= XFRAME (w
->frame
);
3146 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3147 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3150 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3155 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3156 a window and FRAME_MATRIX is the corresponding frame matrix. For
3157 each row in WINDOW_MATRIX check that it's a slice of the
3158 corresponding frame row. If it isn't, abort. */
3161 check_matrix_pointers (window_matrix
, frame_matrix
)
3162 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3164 /* Row number in WINDOW_MATRIX. */
3167 /* Row number corresponding to I in FRAME_MATRIX. */
3168 int j
= window_matrix
->matrix_y
;
3170 /* For all rows check that the row in the window matrix is a
3171 slice of the row in the frame matrix. If it isn't we didn't
3172 mirror an operation on the frame matrix correctly. */
3173 while (i
< window_matrix
->nrows
)
3175 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3176 frame_matrix
->rows
+ j
))
3182 #endif /* GLYPH_DEBUG != 0 */
3186 /**********************************************************************
3187 VPOS and HPOS translations
3188 **********************************************************************/
3192 /* Translate vertical position VPOS which is relative to window W to a
3193 vertical position relative to W's frame. */
3196 window_to_frame_vpos (w
, vpos
)
3200 struct frame
*f
= XFRAME (w
->frame
);
3202 xassert (!FRAME_WINDOW_P (f
));
3203 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3204 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3205 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3210 /* Translate horizontal position HPOS which is relative to window W to
3211 a horizontal position relative to W's frame. */
3214 window_to_frame_hpos (w
, hpos
)
3218 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3219 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3223 #endif /* GLYPH_DEBUG */
3227 /**********************************************************************
3229 **********************************************************************/
3231 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3232 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3237 CHECK_LIVE_FRAME (frame
);
3240 /* Ignore redraw requests, if frame has no glyphs yet.
3241 (Implementation note: It still has to be checked why we are
3242 called so early here). */
3243 if (!glyphs_initialized_initially_p
)
3248 if (FRAME_MSDOS_P (f
))
3249 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3252 clear_current_matrices (f
);
3254 if (FRAME_TERMCAP_P (f
))
3255 fflush (FRAME_TTY (f
)->output
);
3256 windows_or_buffers_changed
++;
3257 /* Mark all windows as inaccurate, so that every window will have
3258 its redisplay done. */
3259 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3260 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3266 /* Redraw frame F. This is nothing more than a call to the Lisp
3267 function redraw-frame. */
3270 redraw_frame (struct frame
*f
)
3273 XSETFRAME (frame
, f
);
3274 Fredraw_frame (frame
);
3278 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3279 doc
: /* Clear and redisplay all visible frames. */)
3282 Lisp_Object tail
, frame
;
3284 FOR_EACH_FRAME (tail
, frame
)
3285 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3286 Fredraw_frame (frame
);
3292 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3293 visible frames marked as garbaged. */
3296 redraw_garbaged_frames (void)
3298 Lisp_Object tail
, frame
;
3300 FOR_EACH_FRAME (tail
, frame
)
3301 if (FRAME_VISIBLE_P (XFRAME (frame
))
3302 && FRAME_GARBAGED_P (XFRAME (frame
)))
3303 Fredraw_frame (frame
);
3308 /***********************************************************************
3310 ***********************************************************************/
3312 /* Update frame F based on the data in desired matrices.
3314 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3315 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3318 Value is non-zero if redisplay was stopped due to pending input. */
3321 update_frame (struct frame
*f
, int force_p
, int inhibit_hairy_id_p
)
3323 /* 1 means display has been paused because of pending input. */
3325 struct window
*root_window
= XWINDOW (f
->root_window
);
3327 if (redisplay_dont_pause
)
3329 #if PERIODIC_PREEMPTION_CHECKING
3330 else if (NILP (Vredisplay_preemption_period
))
3332 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3335 double p
= XFLOATINT (Vredisplay_preemption_period
);
3338 if (detect_input_pending_ignore_squeezables ())
3345 usec
= (p
- sec
) * 1000000;
3347 EMACS_GET_TIME (tm
);
3348 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3349 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3353 if (FRAME_WINDOW_P (f
))
3355 /* We are working on window matrix basis. All windows whose
3356 flag must_be_updated_p is set have to be updated. */
3358 /* Record that we are not working on frame matrices. */
3359 set_frame_matrix_frame (NULL
);
3361 /* Update all windows in the window tree of F, maybe stopping
3362 when pending input is detected. */
3365 /* Update the menu bar on X frames that don't have toolkit
3367 if (WINDOWP (f
->menu_bar_window
))
3368 update_window (XWINDOW (f
->menu_bar_window
), 1);
3370 /* Update the tool-bar window, if present. */
3371 if (WINDOWP (f
->tool_bar_window
))
3373 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3375 /* Update tool-bar window. */
3376 if (w
->must_be_updated_p
)
3380 update_window (w
, 1);
3381 w
->must_be_updated_p
= 0;
3383 /* Swap tool-bar strings. We swap because we want to
3385 tem
= f
->current_tool_bar_string
;
3386 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3387 f
->desired_tool_bar_string
= tem
;
3392 /* Update windows. */
3393 paused_p
= update_window_tree (root_window
, force_p
);
3396 /* This flush is a performance bottleneck under X,
3397 and it doesn't seem to be necessary anyway (in general).
3398 It is necessary when resizing the window with the mouse, or
3399 at least the fringes are not redrawn in a timely manner. ++kfs */
3400 if (f
->force_flush_display_p
)
3402 FRAME_RIF (f
)->flush_display (f
);
3403 f
->force_flush_display_p
= 0;
3408 /* We are working on frame matrix basis. Set the frame on whose
3409 frame matrix we operate. */
3410 set_frame_matrix_frame (f
);
3412 /* Build F's desired matrix from window matrices. */
3413 build_frame_matrix (f
);
3415 /* Update the display */
3417 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3420 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3422 if (FRAME_TTY (f
)->termscript
)
3423 fflush (FRAME_TTY (f
)->termscript
);
3424 if (FRAME_TERMCAP_P (f
))
3425 fflush (FRAME_TTY (f
)->output
);
3428 /* Check window matrices for lost pointers. */
3430 check_window_matrix_pointers (root_window
);
3431 add_frame_display_history (f
, paused_p
);
3436 /* Reset flags indicating that a window should be updated. */
3437 set_window_update_flags (root_window
, 0);
3439 display_completed
= !paused_p
;
3445 /************************************************************************
3446 Window-based updates
3447 ************************************************************************/
3449 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3450 don't stop updating when input is pending. */
3453 update_window_tree (struct window
*w
, int force_p
)
3457 while (w
&& !paused_p
)
3459 if (!NILP (w
->hchild
))
3460 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3461 else if (!NILP (w
->vchild
))
3462 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3463 else if (w
->must_be_updated_p
)
3464 paused_p
|= update_window (w
, force_p
);
3466 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3473 /* Update window W if its flag must_be_updated_p is non-zero. If
3474 FORCE_P is non-zero, don't stop updating if input is pending. */
3477 update_single_window (struct window
*w
, int force_p
)
3479 if (w
->must_be_updated_p
)
3481 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3483 /* Record that this is not a frame-based redisplay. */
3484 set_frame_matrix_frame (NULL
);
3486 if (redisplay_dont_pause
)
3488 #if PERIODIC_PREEMPTION_CHECKING
3489 else if (NILP (Vredisplay_preemption_period
))
3491 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3494 double p
= XFLOATINT (Vredisplay_preemption_period
);
3498 usec
= (p
- sec
) * 1000000;
3500 EMACS_GET_TIME (tm
);
3501 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3502 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3508 update_window (w
, force_p
);
3511 /* Reset flag in W. */
3512 w
->must_be_updated_p
= 0;
3516 #ifdef HAVE_WINDOW_SYSTEM
3518 /* Redraw lines from the current matrix of window W that are
3519 overlapped by other rows. YB is bottom-most y-position in W. */
3522 redraw_overlapped_rows (struct window
*w
, int yb
)
3525 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3527 /* If rows overlapping others have been changed, the rows being
3528 overlapped have to be redrawn. This won't draw lines that have
3529 already been drawn in update_window_line because overlapped_p in
3530 desired rows is 0, so after row assignment overlapped_p in
3531 current rows is 0. */
3532 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3534 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3536 if (!row
->enabled_p
)
3538 else if (row
->mode_line_p
)
3541 if (row
->overlapped_p
)
3543 enum glyph_row_area area
;
3545 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3548 updated_area
= area
;
3549 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3550 area
== TEXT_AREA
? row
->x
: 0);
3551 if (row
->used
[area
])
3552 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3554 FRAME_RIF (f
)->clear_end_of_line (-1);
3557 row
->overlapped_p
= 0;
3560 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3566 /* Redraw lines from the current matrix of window W that overlap
3567 others. YB is bottom-most y-position in W. */
3570 redraw_overlapping_rows (struct window
*w
, int yb
)
3573 struct glyph_row
*row
;
3574 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3576 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3578 row
= w
->current_matrix
->rows
+ i
;
3580 if (!row
->enabled_p
)
3582 else if (row
->mode_line_p
)
3585 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3587 if (row
->overlapping_p
)
3591 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
3592 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
3593 overlaps
|= OVERLAPS_PRED
;
3594 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
3595 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
3596 overlaps
|= OVERLAPS_SUCC
;
3600 if (row
->used
[LEFT_MARGIN_AREA
])
3601 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
3603 if (row
->used
[TEXT_AREA
])
3604 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
3606 if (row
->used
[RIGHT_MARGIN_AREA
])
3607 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
3609 /* Record in neighbour rows that ROW overwrites part of
3611 if (overlaps
& OVERLAPS_PRED
)
3612 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3613 if (overlaps
& OVERLAPS_SUCC
)
3614 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3623 #endif /* HAVE_WINDOW_SYSTEM */
3628 /* Check that no row in the current matrix of window W is enabled
3629 which is below what's displayed in the window. */
3632 check_current_matrix_flags (struct window
*w
)
3634 int last_seen_p
= 0;
3635 int i
, yb
= window_text_bottom_y (w
);
3637 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
3639 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
3640 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3642 else if (last_seen_p
&& row
->enabled_p
)
3647 #endif /* GLYPH_DEBUG */
3650 /* Update display of window W. FORCE_P non-zero means that we should
3651 not stop when detecting pending input. */
3654 update_window (struct window
*w
, int force_p
)
3656 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3658 #if !PERIODIC_PREEMPTION_CHECKING
3659 int preempt_count
= baud_rate
/ 2400 + 1;
3661 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3663 /* Check that W's frame doesn't have glyph matrices. */
3664 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
3667 /* Check pending input the first time so that we can quickly return. */
3668 #if !PERIODIC_PREEMPTION_CHECKING
3670 detect_input_pending_ignore_squeezables ();
3673 /* If forced to complete the update, or if no input is pending, do
3675 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
3677 struct glyph_row
*row
, *end
;
3678 struct glyph_row
*mode_line_row
;
3679 struct glyph_row
*header_line_row
;
3680 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
3682 rif
->update_window_begin_hook (w
);
3683 yb
= window_text_bottom_y (w
);
3685 /* If window has a header line, update it before everything else.
3686 Adjust y-positions of other rows by the header line height. */
3687 row
= desired_matrix
->rows
;
3688 end
= row
+ desired_matrix
->nrows
- 1;
3690 if (row
->mode_line_p
)
3692 header_line_row
= row
;
3696 header_line_row
= NULL
;
3698 /* Update the mode line, if necessary. */
3699 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3700 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3702 mode_line_row
->y
= yb
;
3703 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3705 &mouse_face_overwritten_p
);
3708 /* Find first enabled row. Optimizations in redisplay_internal
3709 may lead to an update with only one row enabled. There may
3710 be also completely empty matrices. */
3711 while (row
< end
&& !row
->enabled_p
)
3714 /* Try reusing part of the display by copying. */
3715 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
3717 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
3720 /* All rows were found to be equal. */
3726 /* We've scrolled the display. */
3732 /* Update the rest of the lines. */
3733 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
3736 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
3739 /* We'll have to play a little bit with when to
3740 detect_input_pending. If it's done too often,
3741 scrolling large windows with repeated scroll-up
3742 commands will too quickly pause redisplay. */
3743 #if PERIODIC_PREEMPTION_CHECKING
3747 EMACS_GET_TIME (tm
);
3748 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
3749 if (EMACS_TIME_NEG_P (dif
))
3751 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3752 if (detect_input_pending_ignore_squeezables ())
3757 if (!force_p
&& ++n_updated
% preempt_count
== 0)
3758 detect_input_pending_ignore_squeezables ();
3760 changed_p
|= update_window_line (w
, vpos
,
3761 &mouse_face_overwritten_p
);
3763 /* Mark all rows below the last visible one in the current
3764 matrix as invalid. This is necessary because of
3765 variable line heights. Consider the case of three
3766 successive redisplays, where the first displays 5
3767 lines, the second 3 lines, and the third 5 lines again.
3768 If the second redisplay wouldn't mark rows in the
3769 current matrix invalid, the third redisplay might be
3770 tempted to optimize redisplay based on lines displayed
3771 in the first redisplay. */
3772 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3773 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
3774 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
3777 /* Was display preempted? */
3778 paused_p
= row
< end
;
3782 /* Update the header line after scrolling because a new header
3783 line would otherwise overwrite lines at the top of the window
3784 that can be scrolled. */
3785 if (header_line_row
&& header_line_row
->enabled_p
)
3787 header_line_row
->y
= 0;
3788 update_window_line (w
, 0, &mouse_face_overwritten_p
);
3791 /* Fix the appearance of overlapping/overlapped rows. */
3792 if (!paused_p
&& !w
->pseudo_window_p
)
3794 #ifdef HAVE_WINDOW_SYSTEM
3795 if (changed_p
&& rif
->fix_overlapping_area
)
3797 redraw_overlapped_rows (w
, yb
);
3798 redraw_overlapping_rows (w
, yb
);
3802 /* Make cursor visible at cursor position of W. */
3803 set_window_cursor_after_update (w
);
3805 #if 0 /* Check that current matrix invariants are satisfied. This is
3806 for debugging only. See the comment of check_matrix_invariants. */
3807 IF_DEBUG (check_matrix_invariants (w
));
3812 /* Remember the redisplay method used to display the matrix. */
3813 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
3816 #ifdef HAVE_WINDOW_SYSTEM
3817 update_window_fringes (w
, 0);
3820 /* End the update of window W. Don't set the cursor if we
3821 paused updating the display because in this case,
3822 set_window_cursor_after_update hasn't been called, and
3823 output_cursor doesn't contain the cursor location. */
3824 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
3830 /* check_current_matrix_flags (w); */
3831 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
3834 clear_glyph_matrix (desired_matrix
);
3840 /* Update the display of area AREA in window W, row number VPOS.
3841 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
3844 update_marginal_area (struct window
*w
, int area
, int vpos
)
3846 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3847 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3849 /* Let functions in xterm.c know what area subsequent X positions
3850 will be relative to. */
3851 updated_area
= area
;
3853 /* Set cursor to start of glyphs, write them, and clear to the end
3854 of the area. I don't think that something more sophisticated is
3855 necessary here, since marginal areas will not be the default. */
3856 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
3857 if (desired_row
->used
[area
])
3858 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
3859 rif
->clear_end_of_line (-1);
3863 /* Update the display of the text area of row VPOS in window W.
3864 Value is non-zero if display has changed. */
3867 update_text_area (struct window
*w
, int vpos
)
3869 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
3870 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3871 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3874 /* Let functions in xterm.c know what area subsequent X positions
3875 will be relative to. */
3876 updated_area
= TEXT_AREA
;
3878 /* If rows are at different X or Y, or rows have different height,
3879 or the current row is marked invalid, write the entire line. */
3880 if (!current_row
->enabled_p
3881 || desired_row
->y
!= current_row
->y
3882 || desired_row
->ascent
!= current_row
->ascent
3883 || desired_row
->phys_ascent
!= current_row
->phys_ascent
3884 || desired_row
->phys_height
!= current_row
->phys_height
3885 || desired_row
->visible_height
!= current_row
->visible_height
3886 || current_row
->overlapped_p
3887 /* This next line is necessary for correctly redrawing
3888 mouse-face areas after scrolling and other operations.
3889 However, it causes excessive flickering when mouse is moved
3890 across the mode line. Luckily, turning it off for the mode
3891 line doesn't seem to hurt anything. -- cyd.
3892 But it is still needed for the header line. -- kfs. */
3893 || (current_row
->mouse_face_p
3894 && !(current_row
->mode_line_p
&& vpos
> 0))
3895 || current_row
->x
!= desired_row
->x
)
3897 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
3899 if (desired_row
->used
[TEXT_AREA
])
3900 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
3901 desired_row
->used
[TEXT_AREA
]);
3903 /* Clear to end of window. */
3904 rif
->clear_end_of_line (-1);
3907 /* This erases the cursor. We do this here because
3908 notice_overwritten_cursor cannot easily check this, which
3909 might indicate that the whole functionality of
3910 notice_overwritten_cursor would better be implemented here.
3911 On the other hand, we need notice_overwritten_cursor as long
3912 as mouse highlighting is done asynchronously outside of
3914 if (vpos
== w
->phys_cursor
.vpos
)
3915 w
->phys_cursor_on_p
= 0;
3920 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
3921 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
3922 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
3923 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
3924 int abort_skipping
= 0;
3926 /* If the desired row extends its face to the text area end, and
3927 unless the current row also does so at the same position,
3928 make sure we write at least one glyph, so that the face
3929 extension actually takes place. */
3930 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
3931 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
3932 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
3933 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
3936 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
3940 /* Loop over glyphs that current and desired row may have
3944 int can_skip_p
= !abort_skipping
;
3946 /* Skip over glyphs that both rows have in common. These
3947 don't have to be written. We can't skip if the last
3948 current glyph overlaps the glyph to its right. For
3949 example, consider a current row of `if ' with the `f' in
3950 Courier bold so that it overlaps the ` ' to its right.
3951 If the desired row is ` ', we would skip over the space
3952 after the `if' and there would remain a pixel from the
3953 `f' on the screen. */
3954 if (overlapping_glyphs_p
&& i
> 0)
3956 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
3959 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
3961 can_skip_p
= (right
== 0 && !abort_skipping
);
3969 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
3971 x
+= desired_glyph
->pixel_width
;
3972 ++desired_glyph
, ++current_glyph
, ++i
;
3975 /* Consider the case that the current row contains "xxx
3976 ppp ggg" in italic Courier font, and the desired row
3977 is "xxx ggg". The character `p' has lbearing, `g'
3978 has not. The loop above will stop in front of the
3979 first `p' in the current row. If we would start
3980 writing glyphs there, we wouldn't erase the lbearing
3981 of the `p'. The rest of the lbearing problem is then
3982 taken care of by draw_glyphs. */
3983 if (overlapping_glyphs_p
3985 && i
< current_row
->used
[TEXT_AREA
]
3986 && (current_row
->used
[TEXT_AREA
]
3987 != desired_row
->used
[TEXT_AREA
]))
3991 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
3993 while (left
> 0 && i
> 0)
3995 --i
, --desired_glyph
, --current_glyph
;
3996 x
-= desired_glyph
->pixel_width
;
3997 left
-= desired_glyph
->pixel_width
;
4000 /* Abort the skipping algorithm if we end up before
4001 our starting point, to avoid looping (bug#1070).
4002 This can happen when the lbearing is larger than
4004 abort_skipping
= (i
< start_hpos
);
4008 /* Try to avoid writing the entire rest of the desired row
4009 by looking for a resync point. This mainly prevents
4010 mode line flickering in the case the mode line is in
4011 fixed-pitch font, which it usually will be. */
4012 if (i
< desired_row
->used
[TEXT_AREA
])
4014 int start_x
= x
, start_hpos
= i
;
4015 struct glyph
*start
= desired_glyph
;
4017 int skip_first_p
= !can_skip_p
;
4019 /* Find the next glyph that's equal again. */
4022 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4025 x
+= desired_glyph
->pixel_width
;
4026 current_x
+= current_glyph
->pixel_width
;
4027 ++desired_glyph
, ++current_glyph
, ++i
;
4031 if (i
== start_hpos
|| x
!= current_x
)
4035 desired_glyph
= start
;
4039 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4040 rif
->write_glyphs (start
, i
- start_hpos
);
4045 /* Write the rest. */
4046 if (i
< desired_row
->used
[TEXT_AREA
])
4048 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4049 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4053 /* Maybe clear to end of line. */
4054 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4056 /* If new row extends to the end of the text area, nothing
4057 has to be cleared, if and only if we did a write_glyphs
4058 above. This is made sure by setting desired_stop_pos
4059 appropriately above. */
4060 xassert (i
< desired_row
->used
[TEXT_AREA
]
4061 || ((desired_row
->used
[TEXT_AREA
]
4062 == current_row
->used
[TEXT_AREA
])
4063 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4065 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4067 /* If old row extends to the end of the text area, clear. */
4068 if (i
>= desired_row
->used
[TEXT_AREA
])
4069 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4070 desired_row
->pixel_width
);
4071 rif
->clear_end_of_line (-1);
4074 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4076 /* Otherwise clear to the end of the old row. Everything
4077 after that position should be clear already. */
4080 if (i
>= desired_row
->used
[TEXT_AREA
])
4081 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4082 desired_row
->pixel_width
);
4084 /* If cursor is displayed at the end of the line, make sure
4085 it's cleared. Nowadays we don't have a phys_cursor_glyph
4086 with which to erase the cursor (because this method
4087 doesn't work with lbearing/rbearing), so we must do it
4089 if (vpos
== w
->phys_cursor
.vpos
4090 && (desired_row
->reversed_p
4091 ? (w
->phys_cursor
.hpos
< 0)
4092 : (w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])))
4094 w
->phys_cursor_on_p
= 0;
4098 x
= current_row
->pixel_width
;
4099 rif
->clear_end_of_line (x
);
4108 /* Update row VPOS in window W. Value is non-zero if display has been
4112 update_window_line (struct window
*w
, int vpos
, int *mouse_face_overwritten_p
)
4114 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4115 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4116 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4119 /* Set the row being updated. This is important to let xterm.c
4120 know what line height values are in effect. */
4121 updated_row
= desired_row
;
4123 /* A row can be completely invisible in case a desired matrix was
4124 built with a vscroll and then make_cursor_line_fully_visible shifts
4125 the matrix. Make sure to make such rows current anyway, since
4126 we need the correct y-position, for example, in the current matrix. */
4127 if (desired_row
->mode_line_p
4128 || desired_row
->visible_height
> 0)
4130 xassert (desired_row
->enabled_p
);
4132 /* Update display of the left margin area, if there is one. */
4133 if (!desired_row
->full_width_p
4134 && !NILP (w
->left_margin_cols
))
4137 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4140 /* Update the display of the text area. */
4141 if (update_text_area (w
, vpos
))
4144 if (current_row
->mouse_face_p
)
4145 *mouse_face_overwritten_p
= 1;
4148 /* Update display of the right margin area, if there is one. */
4149 if (!desired_row
->full_width_p
4150 && !NILP (w
->right_margin_cols
))
4153 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4156 /* Draw truncation marks etc. */
4157 if (!current_row
->enabled_p
4158 || desired_row
->y
!= current_row
->y
4159 || desired_row
->visible_height
!= current_row
->visible_height
4160 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4161 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4162 || current_row
->redraw_fringe_bitmaps_p
4163 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4164 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4165 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4166 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4167 rif
->after_update_window_line_hook (desired_row
);
4170 /* Update current_row from desired_row. */
4171 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4177 /* Set the cursor after an update of window W. This function may only
4178 be called from update_window. */
4181 set_window_cursor_after_update (struct window
*w
)
4183 struct frame
*f
= XFRAME (w
->frame
);
4184 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4185 int cx
, cy
, vpos
, hpos
;
4187 /* Not intended for frame matrix updates. */
4188 xassert (FRAME_WINDOW_P (f
));
4190 if (cursor_in_echo_area
4191 && !NILP (echo_area_buffer
[0])
4192 /* If we are showing a message instead of the mini-buffer,
4193 show the cursor for the message instead. */
4194 && XWINDOW (minibuf_window
) == w
4195 && EQ (minibuf_window
, echo_area_window
)
4196 /* These cases apply only to the frame that contains
4197 the active mini-buffer window. */
4198 && FRAME_HAS_MINIBUF_P (f
)
4199 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4201 cx
= cy
= vpos
= hpos
= 0;
4203 if (cursor_in_echo_area
>= 0)
4205 /* If the mini-buffer is several lines high, find the last
4206 line that has any text on it. Note: either all lines
4207 are enabled or none. Otherwise we wouldn't be able to
4209 struct glyph_row
*row
, *last_row
;
4210 struct glyph
*glyph
;
4211 int yb
= window_text_bottom_y (w
);
4214 row
= w
->current_matrix
->rows
;
4215 while (row
->enabled_p
4216 && (last_row
== NULL
4217 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4219 if (row
->used
[TEXT_AREA
]
4220 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4227 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4228 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4230 while (last
> start
&& last
->charpos
< 0)
4233 for (glyph
= start
; glyph
< last
; ++glyph
)
4235 cx
+= glyph
->pixel_width
;
4240 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4248 hpos
= w
->cursor
.hpos
;
4249 vpos
= w
->cursor
.vpos
;
4252 /* Window cursor can be out of sync for horizontally split windows. */
4253 hpos
= max (-1, hpos
); /* -1 is for when cursor is on the left fringe */
4254 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4255 vpos
= max (0, vpos
);
4256 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4257 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4261 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4262 tree rooted at W. */
4265 set_window_update_flags (struct window
*w
, int on_p
)
4269 if (!NILP (w
->hchild
))
4270 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4271 else if (!NILP (w
->vchild
))
4272 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4274 w
->must_be_updated_p
= on_p
;
4276 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4282 /***********************************************************************
4283 Window-Based Scrolling
4284 ***********************************************************************/
4286 /* Structure describing rows in scrolling_window. */
4290 /* Number of occurrences of this row in desired and current matrix. */
4291 int old_uses
, new_uses
;
4293 /* Vpos of row in new matrix. */
4294 int new_line_number
;
4296 /* Bucket index of this row_entry in the hash table row_table. */
4299 /* The row described by this entry. */
4300 struct glyph_row
*row
;
4302 /* Hash collision chain. */
4303 struct row_entry
*next
;
4306 /* A pool to allocate row_entry structures from, and the size of the
4307 pool. The pool is reallocated in scrolling_window when we find
4308 that we need a larger one. */
4310 static struct row_entry
*row_entry_pool
;
4311 static int row_entry_pool_size
;
4313 /* Index of next free entry in row_entry_pool. */
4315 static int row_entry_idx
;
4317 /* The hash table used during scrolling, and the table's size. This
4318 table is used to quickly identify equal rows in the desired and
4321 static struct row_entry
**row_table
;
4322 static int row_table_size
;
4324 /* Vectors of pointers to row_entry structures belonging to the
4325 current and desired matrix, and the size of the vectors. */
4327 static struct row_entry
**old_lines
, **new_lines
;
4328 static int old_lines_size
, new_lines_size
;
4330 /* A pool to allocate run structures from, and its size. */
4332 static struct run
*run_pool
;
4333 static int runs_size
;
4335 /* A vector of runs of lines found during scrolling. */
4337 static struct run
**runs
;
4339 /* Add glyph row ROW to the scrolling hash table during the scrolling
4342 static INLINE
struct row_entry
*
4343 add_row_entry (struct window
*w
, struct glyph_row
*row
)
4345 struct row_entry
*entry
;
4346 int i
= row
->hash
% row_table_size
;
4348 entry
= row_table
[i
];
4349 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4350 entry
= entry
->next
;
4354 entry
= row_entry_pool
+ row_entry_idx
++;
4356 entry
->old_uses
= entry
->new_uses
= 0;
4357 entry
->new_line_number
= 0;
4359 entry
->next
= row_table
[i
];
4360 row_table
[i
] = entry
;
4367 /* Try to reuse part of the current display of W by scrolling lines.
4368 HEADER_LINE_P non-zero means W has a header line.
4370 The algorithm is taken from Communications of the ACM, Apr78 "A
4371 Technique for Isolating Differences Between Files." It should take
4374 A short outline of the steps of the algorithm
4376 1. Skip lines equal at the start and end of both matrices.
4378 2. Enter rows in the current and desired matrix into a symbol
4379 table, counting how often they appear in both matrices.
4381 3. Rows that appear exactly once in both matrices serve as anchors,
4382 i.e. we assume that such lines are likely to have been moved.
4384 4. Starting from anchor lines, extend regions to be scrolled both
4385 forward and backward.
4389 -1 if all rows were found to be equal.
4390 0 to indicate that we did not scroll the display, or
4391 1 if we did scroll. */
4394 scrolling_window (struct window
*w
, int header_line_p
)
4396 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4397 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4398 int yb
= window_text_bottom_y (w
);
4399 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4400 int nruns
, nbytes
, n
, run_idx
;
4401 struct row_entry
*entry
;
4402 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4404 /* Skip over rows equal at the start. */
4405 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4407 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4408 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4412 && !d
->redraw_fringe_bitmaps_p
4414 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4415 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4416 && row_equal_p (w
, c
, d
, 1))
4425 /* Give up if some rows in the desired matrix are not enabled. */
4426 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4429 first_old
= first_new
= i
;
4431 /* Set last_new to the index + 1 of the last enabled row in the
4434 while (i
< desired_matrix
->nrows
- 1
4435 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4436 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4439 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4444 /* Set last_old to the index + 1 of the last enabled row in the
4445 current matrix. We don't look at the enabled flag here because
4446 we plan to reuse part of the display even if other parts are
4449 while (i
< current_matrix
->nrows
- 1)
4451 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4460 /* Skip over rows equal at the bottom. */
4463 while (i
- 1 > first_new
4464 && j
- 1 > first_old
4465 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4466 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4467 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4468 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4470 MATRIX_ROW (desired_matrix
, i
- 1),
4471 MATRIX_ROW (current_matrix
, j
- 1), 1))
4476 /* Nothing to do if all rows are equal. */
4477 if (last_new
== first_new
)
4480 /* Reallocate vectors, tables etc. if necessary. */
4482 if (current_matrix
->nrows
> old_lines_size
)
4484 old_lines_size
= current_matrix
->nrows
;
4485 nbytes
= old_lines_size
* sizeof *old_lines
;
4486 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4489 if (desired_matrix
->nrows
> new_lines_size
)
4491 new_lines_size
= desired_matrix
->nrows
;
4492 nbytes
= new_lines_size
* sizeof *new_lines
;
4493 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4496 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4497 if (3 * n
> row_table_size
)
4499 row_table_size
= next_almost_prime (3 * n
);
4500 nbytes
= row_table_size
* sizeof *row_table
;
4501 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4502 memset (row_table
, 0, nbytes
);
4505 if (n
> row_entry_pool_size
)
4507 row_entry_pool_size
= n
;
4508 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4509 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4512 if (desired_matrix
->nrows
> runs_size
)
4514 runs_size
= desired_matrix
->nrows
;
4515 nbytes
= runs_size
* sizeof *runs
;
4516 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4517 nbytes
= runs_size
* sizeof *run_pool
;
4518 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4521 nruns
= run_idx
= 0;
4524 /* Add rows from the current and desired matrix to the hash table
4525 row_hash_table to be able to find equal ones quickly. */
4527 for (i
= first_old
; i
< last_old
; ++i
)
4529 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4531 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4532 old_lines
[i
] = entry
;
4536 old_lines
[i
] = NULL
;
4539 for (i
= first_new
; i
< last_new
; ++i
)
4541 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4542 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4544 entry
->new_line_number
= i
;
4545 new_lines
[i
] = entry
;
4548 /* Identify moves based on lines that are unique and equal
4549 in both matrices. */
4550 for (i
= first_old
; i
< last_old
;)
4552 && old_lines
[i
]->old_uses
== 1
4553 && old_lines
[i
]->new_uses
== 1)
4556 int new_line
= old_lines
[i
]->new_line_number
;
4557 struct run
*run
= run_pool
+ run_idx
++;
4560 run
->current_vpos
= i
;
4561 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4562 run
->desired_vpos
= new_line
;
4563 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4565 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4567 /* Extend backward. */
4570 while (j
> first_old
4572 && old_lines
[j
] == new_lines
[k
])
4574 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4575 --run
->current_vpos
;
4576 --run
->desired_vpos
;
4579 run
->desired_y
-= h
;
4580 run
->current_y
-= h
;
4584 /* Extend forward. */
4589 && old_lines
[j
] == new_lines
[k
])
4591 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4597 /* Insert run into list of all runs. Order runs by copied
4598 pixel lines. Note that we record runs that don't have to
4599 be copied because they are already in place. This is done
4600 because we can avoid calling update_window_line in this
4602 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4604 for (k
= nruns
; k
> j
; --k
)
4605 runs
[k
] = runs
[k
- 1];
4614 /* Do the moves. Do it in a way that we don't overwrite something
4615 we want to copy later on. This is not solvable in general
4616 because there is only one display and we don't have a way to
4617 exchange areas on this display. Example:
4619 +-----------+ +-----------+
4621 +-----------+ --> +-----------+
4623 +-----------+ +-----------+
4625 Instead, prefer bigger moves, and invalidate moves that would
4626 copy from where we copied to. */
4628 for (i
= 0; i
< nruns
; ++i
)
4629 if (runs
[i
]->nrows
> 0)
4631 struct run
*r
= runs
[i
];
4633 /* Copy on the display. */
4634 if (r
->current_y
!= r
->desired_y
)
4636 rif
->scroll_run_hook (w
, r
);
4638 /* Invalidate runs that copy from where we copied to. */
4639 for (j
= i
+ 1; j
< nruns
; ++j
)
4641 struct run
*p
= runs
[j
];
4643 if ((p
->current_y
>= r
->desired_y
4644 && p
->current_y
< r
->desired_y
+ r
->height
)
4645 || (p
->current_y
+ p
->height
>= r
->desired_y
4646 && (p
->current_y
+ p
->height
4647 < r
->desired_y
+ r
->height
)))
4652 /* Assign matrix rows. */
4653 for (j
= 0; j
< r
->nrows
; ++j
)
4655 struct glyph_row
*from
, *to
;
4656 int to_overlapped_p
;
4658 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4659 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4660 to_overlapped_p
= to
->overlapped_p
;
4661 if (!from
->mode_line_p
&& !w
->pseudo_window_p
4662 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
4663 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
4664 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
4665 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
4666 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
4667 from
->redraw_fringe_bitmaps_p
= 1;
4668 assign_row (to
, from
);
4669 to
->enabled_p
= 1, from
->enabled_p
= 0;
4670 to
->overlapped_p
= to_overlapped_p
;
4674 /* Clear the hash table, for the next time. */
4675 for (i
= 0; i
< row_entry_idx
; ++i
)
4676 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4678 /* Value is > 0 to indicate that we scrolled the display. */
4684 /************************************************************************
4686 ************************************************************************/
4688 /* Update the desired frame matrix of frame F.
4690 FORCE_P non-zero means that the update should not be stopped by
4691 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4692 should not be tried.
4694 Value is non-zero if update was stopped due to pending input. */
4697 update_frame_1 (struct frame
*f
, int force_p
, int inhibit_id_p
)
4699 /* Frame matrices to work on. */
4700 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4701 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4704 int preempt_count
= baud_rate
/ 2400 + 1;
4706 xassert (current_matrix
&& desired_matrix
);
4708 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4709 calculate_costs (f
);
4711 if (preempt_count
<= 0)
4714 #if !PERIODIC_PREEMPTION_CHECKING
4715 if (!force_p
&& detect_input_pending_ignore_squeezables ())
4722 /* If we cannot insert/delete lines, it's no use trying it. */
4723 if (!FRAME_LINE_INS_DEL_OK (f
))
4726 /* See if any of the desired lines are enabled; don't compute for
4727 i/d line if just want cursor motion. */
4728 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4729 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4732 /* Try doing i/d line, if not yet inhibited. */
4733 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4734 force_p
|= scrolling (f
);
4736 /* Update the individual lines as needed. Do bottom line first. */
4737 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4738 update_frame_line (f
, desired_matrix
->nrows
- 1);
4740 /* Now update the rest of the lines. */
4741 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4743 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4745 if (FRAME_TERMCAP_P (f
))
4747 /* Flush out every so many lines.
4748 Also flush out if likely to have more than 1k buffered
4749 otherwise. I'm told that some telnet connections get
4750 really screwed by more than 1k output at once. */
4751 FILE *display_output
= FRAME_TTY (f
)->output
;
4754 int outq
= PENDING_OUTPUT_COUNT (display_output
);
4756 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4758 fflush (display_output
);
4759 if (preempt_count
== 1)
4761 #ifdef EMACS_OUTQSIZE
4762 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4763 /* Probably not a tty. Ignore the error and reset
4765 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
4768 if (baud_rate
<= outq
&& baud_rate
> 0)
4769 sleep (outq
/ baud_rate
);
4775 #if PERIODIC_PREEMPTION_CHECKING
4779 EMACS_GET_TIME (tm
);
4780 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4781 if (EMACS_TIME_NEG_P (dif
))
4783 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4784 if (detect_input_pending_ignore_squeezables ())
4789 if (!force_p
&& (i
- 1) % preempt_count
== 0)
4790 detect_input_pending_ignore_squeezables ();
4793 update_frame_line (f
, i
);
4797 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
4799 /* Now just clean up termcap drivers and set cursor, etc. */
4802 if ((cursor_in_echo_area
4803 /* If we are showing a message instead of the mini-buffer,
4804 show the cursor for the message instead of for the
4805 (now hidden) mini-buffer contents. */
4806 || (EQ (minibuf_window
, selected_window
)
4807 && EQ (minibuf_window
, echo_area_window
)
4808 && !NILP (echo_area_buffer
[0])))
4809 /* These cases apply only to the frame that contains
4810 the active mini-buffer window. */
4811 && FRAME_HAS_MINIBUF_P (f
)
4812 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4814 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
4817 if (cursor_in_echo_area
< 0)
4819 /* Negative value of cursor_in_echo_area means put
4820 cursor at beginning of line. */
4826 /* Positive value of cursor_in_echo_area means put
4827 cursor at the end of the prompt. If the mini-buffer
4828 is several lines high, find the last line that has
4830 row
= FRAME_LINES (f
);
4836 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
4838 /* Frame rows are filled up with spaces that
4839 must be ignored here. */
4840 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
4842 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
4843 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
4846 && (last
- 1)->charpos
< 0)
4852 while (row
> top
&& col
== 0);
4854 /* Make sure COL is not out of range. */
4855 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
4857 /* If we have another row, advance cursor into it. */
4858 if (row
< FRAME_LINES (f
) - 1)
4860 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
4863 /* Otherwise move it back in range. */
4865 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
4869 cursor_to (f
, row
, col
);
4873 /* We have only one cursor on terminal frames. Use it to
4874 display the cursor of the selected window. */
4875 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
4876 if (w
->cursor
.vpos
>= 0
4877 /* The cursor vpos may be temporarily out of bounds
4878 in the following situation: There is one window,
4879 with the cursor in the lower half of it. The window
4880 is split, and a message causes a redisplay before
4881 a new cursor position has been computed. */
4882 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
4884 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
4885 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
4887 if (INTEGERP (w
->left_margin_cols
))
4888 x
+= XFASTINT (w
->left_margin_cols
);
4890 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
4891 cursor_to (f
, y
, x
);
4898 clear_desired_matrices (f
);
4903 /* Do line insertions/deletions on frame F for frame-based redisplay. */
4906 scrolling (struct frame
*frame
)
4908 int unchanged_at_top
, unchanged_at_bottom
;
4911 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4912 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4913 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4914 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4916 int free_at_end_vpos
= FRAME_LINES (frame
);
4917 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
4918 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
4920 if (!current_matrix
)
4923 /* Compute hash codes of all the lines. Also calculate number of
4924 changed lines, number of unchanged lines at the beginning, and
4925 number of unchanged lines at the end. */
4927 unchanged_at_top
= 0;
4928 unchanged_at_bottom
= FRAME_LINES (frame
);
4929 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
4931 /* Give up on this scrolling if some old lines are not enabled. */
4932 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
4934 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
4935 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4937 /* This line cannot be redrawn, so don't let scrolling mess it. */
4938 new_hash
[i
] = old_hash
[i
];
4939 #define INFINITY 1000000 /* Taken from scroll.c */
4940 draw_cost
[i
] = INFINITY
;
4944 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
4945 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
4948 if (old_hash
[i
] != new_hash
[i
])
4951 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
4953 else if (i
== unchanged_at_top
)
4955 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
4958 /* If changed lines are few, don't allow preemption, don't scroll. */
4959 if ((!FRAME_SCROLL_REGION_OK (frame
)
4960 && changed_lines
< baud_rate
/ 2400)
4961 || unchanged_at_bottom
== FRAME_LINES (frame
))
4964 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
4965 - unchanged_at_bottom
);
4967 if (FRAME_SCROLL_REGION_OK (frame
))
4968 free_at_end_vpos
-= unchanged_at_bottom
;
4969 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
4970 free_at_end_vpos
= -1;
4972 /* If large window, fast terminal and few lines in common between
4973 current frame and desired frame, don't bother with i/d calc. */
4974 if (!FRAME_SCROLL_REGION_OK (frame
)
4975 && window_size
>= 18 && baud_rate
> 2400
4977 10 * scrolling_max_lines_saved (unchanged_at_top
,
4978 FRAME_LINES (frame
) - unchanged_at_bottom
,
4979 old_hash
, new_hash
, draw_cost
)))
4982 if (window_size
< 2)
4985 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
4986 draw_cost
+ unchanged_at_top
- 1,
4987 old_draw_cost
+ unchanged_at_top
- 1,
4988 old_hash
+ unchanged_at_top
- 1,
4989 new_hash
+ unchanged_at_top
- 1,
4990 free_at_end_vpos
- unchanged_at_top
);
4996 /* Count the number of blanks at the start of the vector of glyphs R
4997 which is LEN glyphs long. */
5000 count_blanks (struct glyph
*r
, int len
)
5004 for (i
= 0; i
< len
; ++i
)
5005 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5012 /* Count the number of glyphs in common at the start of the glyph
5013 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5014 of STR2. Value is the number of equal glyphs equal at the start. */
5017 count_match (struct glyph
*str1
, struct glyph
*end1
, struct glyph
*str2
, struct glyph
*end2
)
5019 struct glyph
*p1
= str1
;
5020 struct glyph
*p2
= str2
;
5024 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5031 /* Char insertion/deletion cost vector, from term.c */
5033 extern int *char_ins_del_vector
;
5034 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5037 /* Perform a frame-based update on line VPOS in frame FRAME. */
5040 update_frame_line (struct frame
*f
, int vpos
)
5042 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5044 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5045 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5046 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5047 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5048 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5049 int must_write_whole_line_p
;
5050 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5051 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5052 != FACE_TTY_DEFAULT_BG_COLOR
);
5054 if (colored_spaces_p
)
5057 /* Current row not enabled means it has unknown contents. We must
5058 write the whole desired line in that case. */
5059 must_write_whole_line_p
= !current_row
->enabled_p
;
5060 if (must_write_whole_line_p
)
5067 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5068 olen
= current_row
->used
[TEXT_AREA
];
5070 /* Ignore trailing spaces, if we can. */
5071 if (!write_spaces_p
)
5072 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5076 current_row
->enabled_p
= 1;
5077 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5079 /* If desired line is empty, just clear the line. */
5080 if (!desired_row
->enabled_p
)
5086 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5087 nlen
= desired_row
->used
[TEXT_AREA
];
5088 nend
= nbody
+ nlen
;
5090 /* If display line has unknown contents, write the whole line. */
5091 if (must_write_whole_line_p
)
5093 /* Ignore spaces at the end, if we can. */
5094 if (!write_spaces_p
)
5095 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5098 /* Write the contents of the desired line. */
5101 cursor_to (f
, vpos
, 0);
5102 write_glyphs (f
, nbody
, nlen
);
5105 /* Don't call clear_end_of_line if we already wrote the whole
5106 line. The cursor will not be at the right margin in that
5107 case but in the line below. */
5108 if (nlen
< FRAME_TOTAL_COLS (f
))
5110 cursor_to (f
, vpos
, nlen
);
5111 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5114 /* Make sure we are in the right row, otherwise cursor movement
5115 with cmgoto might use `ch' in the wrong row. */
5116 cursor_to (f
, vpos
, 0);
5118 make_current (desired_matrix
, current_matrix
, vpos
);
5122 /* Pretend trailing spaces are not there at all,
5123 unless for one reason or another we must write all spaces. */
5124 if (!write_spaces_p
)
5125 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5128 /* If there's no i/d char, quickly do the best we can without it. */
5129 if (!FRAME_CHAR_INS_DEL_OK (f
))
5133 /* Find the first glyph in desired row that doesn't agree with
5134 a glyph in the current row, and write the rest from there on. */
5135 for (i
= 0; i
< nlen
; i
++)
5137 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5139 /* Find the end of the run of different glyphs. */
5143 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5144 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5147 /* Output this run of non-matching chars. */
5148 cursor_to (f
, vpos
, i
);
5149 write_glyphs (f
, nbody
+ i
, j
- i
);
5152 /* Now find the next non-match. */
5156 /* Clear the rest of the line, or the non-clear part of it. */
5159 cursor_to (f
, vpos
, nlen
);
5160 clear_end_of_line (f
, olen
);
5163 /* Make current row = desired row. */
5164 make_current (desired_matrix
, current_matrix
, vpos
);
5168 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5169 characters in a row. */
5173 /* If current line is blank, skip over initial spaces, if
5174 possible, and write the rest. */
5178 nsp
= count_blanks (nbody
, nlen
);
5182 cursor_to (f
, vpos
, nsp
);
5183 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5186 /* Exchange contents between current_frame and new_frame. */
5187 make_current (desired_matrix
, current_matrix
, vpos
);
5191 /* Compute number of leading blanks in old and new contents. */
5192 osp
= count_blanks (obody
, olen
);
5193 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5195 /* Compute number of matching chars starting with first non-blank. */
5196 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5197 nbody
+ nsp
, nbody
+ nlen
);
5199 /* Spaces in new match implicit space past the end of old. */
5200 /* A bug causing this to be a no-op was fixed in 18.29. */
5201 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5204 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5208 /* Avoid doing insert/delete char
5209 just cause number of leading spaces differs
5210 when the following text does not match. */
5211 if (begmatch
== 0 && osp
!= nsp
)
5212 osp
= nsp
= min (osp
, nsp
);
5214 /* Find matching characters at end of line */
5217 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5219 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5224 endmatch
= obody
+ olen
- op1
;
5226 /* tem gets the distance to insert or delete.
5227 endmatch is how many characters we save by doing so.
5230 tem
= (nlen
- nsp
) - (olen
- osp
);
5232 && (!FRAME_CHAR_INS_DEL_OK (f
)
5233 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5236 /* nsp - osp is the distance to insert or delete.
5237 If that is nonzero, begmatch is known to be nonzero also.
5238 begmatch + endmatch is how much we save by doing the ins/del.
5242 && (!FRAME_CHAR_INS_DEL_OK (f
)
5243 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5247 osp
= nsp
= min (osp
, nsp
);
5250 /* Now go through the line, inserting, writing and
5251 deleting as appropriate. */
5255 cursor_to (f
, vpos
, nsp
);
5256 delete_glyphs (f
, osp
- nsp
);
5260 /* If going to delete chars later in line
5261 and insert earlier in the line,
5262 must delete first to avoid losing data in the insert */
5263 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5265 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5266 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5267 olen
= nlen
- (nsp
- osp
);
5269 cursor_to (f
, vpos
, osp
);
5270 insert_glyphs (f
, 0, nsp
- osp
);
5274 tem
= nsp
+ begmatch
+ endmatch
;
5275 if (nlen
!= tem
|| olen
!= tem
)
5277 if (!endmatch
|| nlen
== olen
)
5279 /* If new text being written reaches right margin, there is
5280 no need to do clear-to-eol at the end of this function
5281 (and it would not be safe, since cursor is not going to
5282 be "at the margin" after the text is done). */
5283 if (nlen
== FRAME_TOTAL_COLS (f
))
5286 /* Function write_glyphs is prepared to do nothing
5287 if passed a length <= 0. Check it here to avoid
5288 unnecessary cursor movement. */
5291 cursor_to (f
, vpos
, nsp
+ begmatch
);
5292 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5295 else if (nlen
> olen
)
5297 /* Here, we used to have the following simple code:
5298 ----------------------------------------
5299 write_glyphs (nbody + nsp + begmatch, olen - tem);
5300 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5301 ----------------------------------------
5302 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5303 is a padding glyph. */
5304 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5307 cursor_to (f
, vpos
, nsp
+ begmatch
);
5309 /* Calculate columns we can actually overwrite. */
5310 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5312 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5314 /* If we left columns to be overwritten, we must delete them. */
5315 del
= olen
- tem
- out
;
5317 delete_glyphs (f
, del
);
5319 /* At last, we insert columns not yet written out. */
5320 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5323 else if (olen
> nlen
)
5325 cursor_to (f
, vpos
, nsp
+ begmatch
);
5326 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5327 delete_glyphs (f
, olen
- nlen
);
5333 /* If any unerased characters remain after the new line, erase them. */
5336 cursor_to (f
, vpos
, nlen
);
5337 clear_end_of_line (f
, olen
);
5340 /* Exchange contents between current_frame and new_frame. */
5341 make_current (desired_matrix
, current_matrix
, vpos
);
5346 /***********************************************************************
5347 X/Y Position -> Buffer Position
5348 ***********************************************************************/
5350 /* Determine what's under window-relative pixel position (*X, *Y).
5351 Return the object (string or buffer) that's there.
5352 Return in *POS the position in that object.
5353 Adjust *X and *Y to character positions. */
5356 buffer_posn_from_coords (struct window
*w
, int *x
, int *y
, struct display_pos
*pos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5359 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5360 struct text_pos startp
;
5362 struct glyph_row
*row
;
5363 #ifdef HAVE_WINDOW_SYSTEM
5364 struct image
*img
= 0;
5368 /* We used to set current_buffer directly here, but that does the
5369 wrong thing with `face-remapping-alist' (bug#2044). */
5370 Fset_buffer (w
->buffer
);
5371 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5372 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5373 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5374 start_display (&it
, w
, startp
);
5376 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5377 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5378 MOVE_TO_X
| MOVE_TO_Y
);
5380 Fset_buffer (old_current_buffer
);
5382 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5383 *dy
= *y
- it
.current_y
;
5386 if (STRINGP (it
.string
))
5390 #ifdef HAVE_WINDOW_SYSTEM
5391 if (it
.what
== IT_IMAGE
)
5393 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5394 && !NILP (img
->spec
))
5395 *object
= img
->spec
;
5399 if (it
.vpos
< w
->current_matrix
->nrows
5400 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5403 if (it
.hpos
< row
->used
[TEXT_AREA
])
5405 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5406 #ifdef HAVE_WINDOW_SYSTEM
5409 *dy
-= row
->ascent
- glyph
->ascent
;
5410 *dx
+= glyph
->slice
.x
;
5411 *dy
+= glyph
->slice
.y
;
5412 /* Image slices positions are still relative to the entire image */
5413 *width
= img
->width
;
5414 *height
= img
->height
;
5419 *width
= glyph
->pixel_width
;
5420 *height
= glyph
->ascent
+ glyph
->descent
;
5426 *height
= row
->height
;
5431 *width
= *height
= 0;
5434 /* Add extra (default width) columns if clicked after EOL. */
5435 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5437 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5446 /* Value is the string under window-relative coordinates X/Y in the
5447 mode line or header line (PART says which) of window W, or nil if none.
5448 *CHARPOS is set to the position in the string returned. */
5451 mode_line_string (struct window
*w
, enum window_part part
, int *x
, int *y
, int *charpos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5453 struct glyph_row
*row
;
5454 struct glyph
*glyph
, *end
;
5456 Lisp_Object string
= Qnil
;
5458 if (part
== ON_MODE_LINE
)
5459 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5461 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5463 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5465 if (row
->mode_line_p
&& row
->enabled_p
)
5467 /* Find the glyph under X. If we find one with a string object,
5468 it's the one we were looking for. */
5469 glyph
= row
->glyphs
[TEXT_AREA
];
5470 end
= glyph
+ row
->used
[TEXT_AREA
];
5471 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5472 x0
-= glyph
->pixel_width
;
5473 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5476 string
= glyph
->object
;
5477 *charpos
= glyph
->charpos
;
5478 *width
= glyph
->pixel_width
;
5479 *height
= glyph
->ascent
+ glyph
->descent
;
5480 #ifdef HAVE_WINDOW_SYSTEM
5481 if (glyph
->type
== IMAGE_GLYPH
)
5484 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5486 *object
= img
->spec
;
5487 y0
-= row
->ascent
- glyph
->ascent
;
5493 /* Add extra (default width) columns if clicked after EOL. */
5494 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5496 *height
= row
->height
;
5503 *width
= *height
= 0;
5513 /* Value is the string under window-relative coordinates X/Y in either
5514 marginal area, or nil if none. *CHARPOS is set to the position in
5515 the string returned. */
5518 marginal_area_string (struct window
*w
, enum window_part part
, int *x
, int *y
, int *charpos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5520 struct glyph_row
*row
= w
->current_matrix
->rows
;
5521 struct glyph
*glyph
, *end
;
5522 int x0
, y0
, i
, wy
= *y
;
5524 Lisp_Object string
= Qnil
;
5526 if (part
== ON_LEFT_MARGIN
)
5527 area
= LEFT_MARGIN_AREA
;
5528 else if (part
== ON_RIGHT_MARGIN
)
5529 area
= RIGHT_MARGIN_AREA
;
5533 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5534 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5537 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5541 /* Find the glyph under X. If we find one with a string object,
5542 it's the one we were looking for. */
5543 if (area
== RIGHT_MARGIN_AREA
)
5544 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5545 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5546 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5547 + window_box_width (w
, LEFT_MARGIN_AREA
)
5548 + window_box_width (w
, TEXT_AREA
));
5550 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5551 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5554 glyph
= row
->glyphs
[area
];
5555 end
= glyph
+ row
->used
[area
];
5556 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5557 x0
-= glyph
->pixel_width
;
5558 *x
= glyph
- row
->glyphs
[area
];
5561 string
= glyph
->object
;
5562 *charpos
= glyph
->charpos
;
5563 *width
= glyph
->pixel_width
;
5564 *height
= glyph
->ascent
+ glyph
->descent
;
5565 #ifdef HAVE_WINDOW_SYSTEM
5566 if (glyph
->type
== IMAGE_GLYPH
)
5569 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5571 *object
= img
->spec
;
5572 y0
-= row
->ascent
- glyph
->ascent
;
5573 x0
+= glyph
->slice
.x
;
5574 y0
+= glyph
->slice
.y
;
5580 /* Add extra (default width) columns if clicked after EOL. */
5581 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5583 *height
= row
->height
;
5590 *width
= *height
= 0;
5600 /***********************************************************************
5601 Changing Frame Sizes
5602 ***********************************************************************/
5607 window_change_signal (int signalnum
) /* If we don't have an argument, */
5608 /* some compilers complain in signal calls. */
5611 int old_errno
= errno
;
5613 struct tty_display_info
*tty
;
5615 signal (SIGWINCH
, window_change_signal
);
5616 SIGNAL_THREAD_CHECK (signalnum
);
5618 /* The frame size change obviously applies to a single
5619 termcap-controlled terminal, but we can't decide which.
5620 Therefore, we resize the frames corresponding to each tty.
5622 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
5624 if (! tty
->term_initted
)
5627 /* Suspended tty frames have tty->input == NULL avoid trying to
5632 get_tty_size (fileno (tty
->input
), &width
, &height
);
5634 if (width
> 5 && height
> 2) {
5635 Lisp_Object tail
, frame
;
5637 FOR_EACH_FRAME (tail
, frame
)
5638 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
5639 /* Record the new sizes, but don't reallocate the data
5640 structures now. Let that be done later outside of the
5642 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5648 #endif /* SIGWINCH */
5651 /* Do any change in frame size that was requested by a signal. SAFE
5652 non-zero means this function is called from a place where it is
5653 safe to change frame sizes while a redisplay is in progress. */
5656 do_pending_window_change (int safe
)
5658 /* If window_change_signal should have run before, run it now. */
5659 if (redisplaying_p
&& !safe
)
5662 while (delayed_size_change
)
5664 Lisp_Object tail
, frame
;
5666 delayed_size_change
= 0;
5668 FOR_EACH_FRAME (tail
, frame
)
5670 struct frame
*f
= XFRAME (frame
);
5672 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
5673 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
5680 /* Change the frame height and/or width. Values may be given as zero to
5681 indicate no change is to take place.
5683 If DELAY is non-zero, then assume we're being called from a signal
5684 handler, and queue the change for later - perhaps the next
5685 redisplay. Since this tries to resize windows, we can't call it
5686 from a signal handler.
5688 SAFE non-zero means this function is called from a place where it's
5689 safe to change frame sizes while a redisplay is in progress. */
5692 change_frame_size (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5694 Lisp_Object tail
, frame
;
5696 if (FRAME_MSDOS_P (f
))
5698 /* On MS-DOS, all frames use the same screen, so a change in
5699 size affects all frames. Termcap now supports multiple
5701 FOR_EACH_FRAME (tail
, frame
)
5702 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5703 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5704 pretend
, delay
, safe
);
5707 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5711 change_frame_size_1 (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5713 int new_frame_total_cols
;
5714 int count
= SPECPDL_INDEX ();
5716 /* If we can't deal with the change now, queue it for later. */
5717 if (delay
|| (redisplaying_p
&& !safe
))
5719 f
->new_text_lines
= newheight
;
5720 f
->new_text_cols
= newwidth
;
5721 delayed_size_change
= 1;
5725 /* This size-change overrides any pending one for this frame. */
5726 f
->new_text_lines
= 0;
5727 f
->new_text_cols
= 0;
5729 /* If an argument is zero, set it to the current value. */
5731 newheight
= FRAME_LINES (f
);
5733 newwidth
= FRAME_COLS (f
);
5735 /* Compute width of windows in F.
5736 This is the width of the frame without vertical scroll bars. */
5737 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
5739 /* Round up to the smallest acceptable size. */
5740 check_frame_size (f
, &newheight
, &newwidth
);
5742 /* If we're not changing the frame size, quit now. */
5743 /* Frame width may be unchanged but the text portion may change, for example,
5744 fullscreen and remove/add scroll bar. */
5745 if (newheight
== FRAME_LINES (f
)
5746 && newwidth
== FRAME_COLS (f
) // text portion unchanged
5747 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
)) // frame width unchanged
5753 /* We only can set screen dimensions to certain values supported
5754 by our video hardware. Try to find the smallest size greater
5755 or equal to the requested dimensions. */
5756 dos_set_window_size (&newheight
, &newwidth
);
5759 if (newheight
!= FRAME_LINES (f
))
5761 resize_frame_windows (f
, newheight
, 0);
5763 /* MSDOS frames cannot PRETEND, as they change frame size by
5764 manipulating video hardware. */
5765 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5766 FrameRows (FRAME_TTY (f
)) = newheight
;
5769 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
5771 resize_frame_windows (f
, new_frame_total_cols
, 1);
5773 /* MSDOS frames cannot PRETEND, as they change frame size by
5774 manipulating video hardware. */
5775 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5776 FrameCols (FRAME_TTY (f
)) = newwidth
;
5778 if (WINDOWP (f
->tool_bar_window
))
5779 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
5782 FRAME_LINES (f
) = newheight
;
5783 SET_FRAME_COLS (f
, newwidth
);
5786 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5787 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5789 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5791 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5792 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5793 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5794 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5798 calculate_costs (f
);
5799 SET_FRAME_GARBAGED (f
);
5804 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5806 run_window_configuration_change_hook (f
);
5808 unbind_to (count
, Qnil
);
5813 /***********************************************************************
5814 Terminal Related Lisp Functions
5815 ***********************************************************************/
5817 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5818 1, 1, "FOpen termscript file: ",
5819 doc
: /* Start writing all terminal output to FILE as well as the terminal.
5820 FILE = nil means just close any termscript file currently open. */)
5823 struct tty_display_info
*tty
;
5825 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
5826 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
5827 error ("Current frame is not on a tty device");
5831 if (tty
->termscript
!= 0)
5834 fclose (tty
->termscript
);
5837 tty
->termscript
= 0;
5841 file
= Fexpand_file_name (file
, Qnil
);
5842 tty
->termscript
= fopen (SDATA (file
), "w");
5843 if (tty
->termscript
== 0)
5844 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5850 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5851 Ssend_string_to_terminal
, 1, 2, 0,
5852 doc
: /* Send STRING to the terminal without alteration.
5853 Control characters in STRING will have terminal-dependent effects.
5855 Optional parameter TERMINAL specifies the tty terminal device to use.
5856 It may be a terminal object, a frame, or nil for the terminal used by
5857 the currently selected frame. In batch mode, STRING is sent to stdout
5858 when TERMINAL is nil. */)
5859 (Lisp_Object string
, Lisp_Object terminal
)
5861 struct terminal
*t
= get_terminal (terminal
, 1);
5864 /* ??? Perhaps we should do something special for multibyte strings here. */
5865 CHECK_STRING (string
);
5869 error ("Unknown terminal device");
5871 if (t
->type
== output_initial
)
5873 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
5874 error ("Device %d is not a termcap terminal device", t
->id
);
5877 struct tty_display_info
*tty
= t
->display_info
.tty
;
5880 error ("Terminal is currently suspended");
5882 if (tty
->termscript
)
5884 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
5885 fflush (tty
->termscript
);
5889 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
5896 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5897 doc
: /* Beep, or flash the screen.
5898 Also, unless an argument is given,
5899 terminate any keyboard macro currently executing. */)
5907 ring_bell (XFRAME (selected_frame
));
5916 bitch_at_user (void)
5920 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
5921 error ("Keyboard macro terminated by a command ringing the bell");
5923 ring_bell (XFRAME (selected_frame
));
5928 /***********************************************************************
5930 ***********************************************************************/
5932 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
5933 doc
: /* Pause, without updating display, for SECONDS seconds.
5934 SECONDS may be a floating-point value, meaning that you can wait for a
5935 fraction of a second. Optional second arg MILLISECONDS specifies an
5936 additional wait period, in milliseconds; this may be useful if your
5937 Emacs was built without floating point support.
5938 \(Not all operating systems support waiting for a fraction of a second.) */)
5939 (Lisp_Object seconds
, Lisp_Object milliseconds
)
5943 if (NILP (milliseconds
))
5944 XSETINT (milliseconds
, 0);
5946 CHECK_NUMBER (milliseconds
);
5947 usec
= XINT (milliseconds
) * 1000;
5950 double duration
= extract_float (seconds
);
5951 sec
= (int) duration
;
5952 usec
+= (duration
- sec
) * 1000000;
5955 #ifndef EMACS_HAS_USECS
5956 if (sec
== 0 && usec
!= 0)
5957 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
5960 /* Assure that 0 <= usec < 1000000. */
5963 /* We can't rely on the rounding being correct if usec is negative. */
5964 if (-1000000 < usec
)
5965 sec
--, usec
+= 1000000;
5967 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
5970 sec
+= usec
/ 1000000, usec
%= 1000000;
5972 if (sec
< 0 || (sec
== 0 && usec
== 0))
5975 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
5981 /* This is just like wait_reading_process_output, except that
5984 TIMEOUT is number of seconds to wait (float or integer),
5985 or t to wait forever.
5986 READING is 1 if reading input.
5987 If DO_DISPLAY is >0 display process output while waiting.
5988 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
5992 sit_for (Lisp_Object timeout
, int reading
, int do_display
)
5996 swallow_events (do_display
);
5998 if ((detect_input_pending_run_timers (do_display
))
5999 || !NILP (Vexecuting_kbd_macro
))
6002 if (do_display
>= 2)
6003 redisplay_preserve_echo_area (2);
6005 if (INTEGERP (timeout
))
6007 sec
= XINT (timeout
);
6010 else if (FLOATP (timeout
))
6012 double seconds
= XFLOAT_DATA (timeout
);
6013 sec
= (int) seconds
;
6014 usec
= (int) ((seconds
- sec
) * 1000000);
6016 else if (EQ (timeout
, Qt
))
6022 wrong_type_argument (Qnumberp
, timeout
);
6024 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6031 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6034 return detect_input_pending () ? Qnil
: Qt
;
6038 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6039 doc
: /* Perform redisplay if no input is available.
6040 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6041 perform a full redisplay even if input is available.
6042 Return t if redisplay was performed, nil otherwise. */)
6048 if ((detect_input_pending_run_timers (1)
6049 && NILP (force
) && !redisplay_dont_pause
)
6050 || !NILP (Vexecuting_kbd_macro
))
6053 count
= SPECPDL_INDEX ();
6054 if (!NILP (force
) && !redisplay_dont_pause
)
6055 specbind (Qredisplay_dont_pause
, Qt
);
6056 redisplay_preserve_echo_area (2);
6057 unbind_to (count
, Qnil
);
6063 /***********************************************************************
6064 Other Lisp Functions
6065 ***********************************************************************/
6067 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6068 session's frames, frame names, buffers, buffer-read-only flags, and
6069 buffer-modified-flags. */
6071 static Lisp_Object frame_and_buffer_state
;
6074 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6075 Sframe_or_buffer_changed_p
, 0, 1, 0,
6076 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6077 VARIABLE is a variable name whose value is either nil or a state vector
6078 that will be updated to contain all frames and buffers,
6079 aside from buffers whose names start with space,
6080 along with the buffers' read-only and modified flags. This allows a fast
6081 check to see whether buffer menus might need to be recomputed.
6082 If this function returns non-nil, it updates the internal vector to reflect
6085 If VARIABLE is nil, an internal variable is used. Users should not
6086 pass nil for VARIABLE. */)
6087 (Lisp_Object variable
)
6089 Lisp_Object state
, tail
, frame
, buf
;
6090 Lisp_Object
*vecp
, *end
;
6093 if (! NILP (variable
))
6095 CHECK_SYMBOL (variable
);
6096 state
= Fsymbol_value (variable
);
6097 if (! VECTORP (state
))
6101 state
= frame_and_buffer_state
;
6103 vecp
= XVECTOR (state
)->contents
;
6104 end
= vecp
+ XVECTOR (state
)->size
;
6106 FOR_EACH_FRAME (tail
, frame
)
6110 if (!EQ (*vecp
++, frame
))
6114 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6117 /* Check that the buffer info matches. */
6118 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6120 buf
= XCDR (XCAR (tail
));
6121 /* Ignore buffers that aren't included in buffer lists. */
6122 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6126 if (!EQ (*vecp
++, buf
))
6130 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6134 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6139 /* Detect deletion of a buffer at the end of the list. */
6140 if (EQ (*vecp
, Qlambda
))
6143 /* Come here if we decide the data has changed. */
6145 /* Count the size we will need.
6146 Start with 1 so there is room for at least one lambda at the end. */
6148 FOR_EACH_FRAME (tail
, frame
)
6150 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6152 /* Reallocate the vector if data has grown to need it,
6153 or if it has shrunk a lot. */
6154 if (! VECTORP (state
)
6155 || n
> XVECTOR (state
)->size
6156 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6157 /* Add 20 extra so we grow it less often. */
6159 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6160 if (! NILP (variable
))
6161 Fset (variable
, state
);
6163 frame_and_buffer_state
= state
;
6166 /* Record the new data in the (possibly reallocated) vector. */
6167 vecp
= XVECTOR (state
)->contents
;
6168 FOR_EACH_FRAME (tail
, frame
)
6171 *vecp
++ = XFRAME (frame
)->name
;
6173 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6175 buf
= XCDR (XCAR (tail
));
6176 /* Ignore buffers that aren't included in buffer lists. */
6177 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6180 *vecp
++ = XBUFFER (buf
)->read_only
;
6181 *vecp
++ = Fbuffer_modified_p (buf
);
6183 /* Fill up the vector with lambdas (always at least one). */
6185 while (vecp
- XVECTOR (state
)->contents
6186 < XVECTOR (state
)->size
)
6188 /* Make sure we didn't overflow the vector. */
6189 if (vecp
- XVECTOR (state
)->contents
6190 > XVECTOR (state
)->size
)
6197 /***********************************************************************
6199 ***********************************************************************/
6201 /* Initialization done when Emacs fork is started, before doing stty.
6202 Determine terminal type and set terminal_driver. Then invoke its
6203 decoding routine to set up variables in the terminal package. */
6208 char *terminal_type
;
6210 /* Construct the space glyph. */
6211 space_glyph
.type
= CHAR_GLYPH
;
6212 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6213 space_glyph
.charpos
= -1;
6216 cursor_in_echo_area
= 0;
6217 terminal_type
= (char *) 0;
6219 /* Now is the time to initialize this; it's used by init_sys_modes
6221 Vinitial_window_system
= Qnil
;
6223 /* SIGWINCH needs to be handled no matter what display we start
6224 with. Otherwise newly opened tty frames will not resize
6229 #endif /* CANNOT_DUMP */
6230 signal (SIGWINCH
, window_change_signal
);
6231 #endif /* SIGWINCH */
6233 /* If running as a daemon, no need to initialize any frames/terminal. */
6237 /* If the user wants to use a window system, we shouldn't bother
6238 initializing the terminal. This is especially important when the
6239 terminal is so dumb that emacs gives up before and doesn't bother
6240 using the window system.
6242 If the DISPLAY environment variable is set and nonempty,
6243 try to use X, and die with an error message if that doesn't work. */
6245 #ifdef HAVE_X_WINDOWS
6246 if (! inhibit_window_system
&& ! display_arg
)
6249 display
= getenv ("DISPLAY");
6250 display_arg
= (display
!= 0 && *display
!= 0);
6252 if (display_arg
&& !x_display_ok (display
))
6254 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6256 inhibit_window_system
= 1;
6260 if (!inhibit_window_system
&& display_arg
6266 Vinitial_window_system
= Qx
;
6268 Vwindow_system_version
= make_number (11);
6270 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6271 /* In some versions of ncurses,
6272 tputs crashes if we have not called tgetent.
6274 { char b
[2044]; tgetent (b
, "xterm");}
6276 adjust_frame_glyphs_initially ();
6279 #endif /* HAVE_X_WINDOWS */
6282 if (!inhibit_window_system
)
6284 Vinitial_window_system
= Qw32
;
6285 Vwindow_system_version
= make_number (1);
6286 adjust_frame_glyphs_initially ();
6289 #endif /* HAVE_NTGUI */
6292 if (!inhibit_window_system
6298 Vinitial_window_system
= Qns
;
6299 Vwindow_system_version
= make_number(10);
6300 adjust_frame_glyphs_initially ();
6305 /* If no window system has been specified, try to use the terminal. */
6308 fatal ("standard input is not a tty");
6313 terminal_type
= "w32console";
6315 /* Look at the TERM variable. */
6316 terminal_type
= (char *) getenv ("TERM");
6320 #ifdef HAVE_WINDOW_SYSTEM
6321 if (! inhibit_window_system
)
6322 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6324 #endif /* HAVE_WINDOW_SYSTEM */
6325 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6331 struct frame
*f
= XFRAME (selected_frame
);
6333 /* Open a display on the controlling tty. */
6334 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6336 /* Convert the initial frame to use the new display. */
6337 if (f
->output_method
!= output_initial
)
6339 f
->output_method
= t
->type
;
6342 t
->reference_count
++;
6343 t
->display_info
.tty
->top_frame
= selected_frame
;
6344 change_frame_size (XFRAME (selected_frame
),
6345 FrameRows (t
->display_info
.tty
),
6346 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6348 /* Delete the initial terminal. */
6349 if (--initial_terminal
->reference_count
== 0
6350 && initial_terminal
->delete_terminal_hook
)
6351 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6353 /* Update frame parameters to reflect the new type. */
6354 Fmodify_frame_parameters
6355 (selected_frame
, Fcons (Fcons (Qtty_type
,
6356 Ftty_type (selected_frame
)), Qnil
));
6357 if (t
->display_info
.tty
->name
)
6358 Fmodify_frame_parameters (selected_frame
,
6359 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6362 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
6367 struct frame
*sf
= SELECTED_FRAME ();
6368 int width
= FRAME_TOTAL_COLS (sf
);
6369 int height
= FRAME_LINES (sf
);
6371 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6373 /* If these sizes are so big they cause overflow, just ignore the
6374 change. It's not clear what better we could do. */
6375 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6376 fatal ("screen size %dx%d too big", width
, height
);
6379 adjust_frame_glyphs_initially ();
6380 calculate_costs (XFRAME (selected_frame
));
6382 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6385 && NILP (Vinitial_window_system
))
6387 /* For the initial frame, we don't have any way of knowing what
6388 are the foreground and background colors of the terminal. */
6389 struct frame
*sf
= SELECTED_FRAME();
6391 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6392 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6393 call0 (intern ("tty-set-up-initial-frame-faces"));
6399 /***********************************************************************
6401 ***********************************************************************/
6403 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6404 Sinternal_show_cursor
, 2, 2, 0,
6405 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6406 WINDOW nil means use the selected window. SHOW non-nil means
6407 show a cursor in WINDOW in the next redisplay. SHOW nil means
6408 don't show a cursor. */)
6409 (Lisp_Object window
, Lisp_Object show
)
6411 /* Don't change cursor state while redisplaying. This could confuse
6413 if (!redisplaying_p
)
6416 window
= selected_window
;
6418 CHECK_WINDOW (window
);
6420 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6427 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6428 Sinternal_show_cursor_p
, 0, 1, 0,
6429 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6430 WINDOW nil or omitted means report on the selected window. */)
6431 (Lisp_Object window
)
6436 window
= selected_window
;
6438 CHECK_WINDOW (window
);
6440 w
= XWINDOW (window
);
6441 return w
->cursor_off_p
? Qnil
: Qt
;
6444 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
6445 Slast_nonminibuf_frame
, 0, 0, 0,
6446 doc
: /* Value is last nonminibuffer frame. */)
6449 Lisp_Object frame
= Qnil
;
6451 if (last_nonminibuf_frame
)
6452 XSETFRAME (frame
, last_nonminibuf_frame
);
6457 /***********************************************************************
6459 ***********************************************************************/
6462 syms_of_display (void)
6464 defsubr (&Sredraw_frame
);
6465 defsubr (&Sredraw_display
);
6466 defsubr (&Sframe_or_buffer_changed_p
);
6467 defsubr (&Sopen_termscript
);
6469 defsubr (&Sredisplay
);
6470 defsubr (&Ssleep_for
);
6471 defsubr (&Ssend_string_to_terminal
);
6472 defsubr (&Sinternal_show_cursor
);
6473 defsubr (&Sinternal_show_cursor_p
);
6474 defsubr (&Slast_nonminibuf_frame
);
6477 defsubr (&Sdump_redisplay_history
);
6480 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6481 staticpro (&frame_and_buffer_state
);
6483 Qdisplay_table
= intern_c_string ("display-table");
6484 staticpro (&Qdisplay_table
);
6485 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
6486 staticpro (&Qredisplay_dont_pause
);
6488 DEFVAR_INT ("baud-rate", &baud_rate
,
6489 doc
: /* *The output baud rate of the terminal.
6490 On most systems, changing this value will affect the amount of padding
6491 and the other strategic decisions made during redisplay. */);
6493 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6494 doc
: /* *Non-nil means invert the entire frame display.
6495 This means everything is in inverse video which otherwise would not be. */);
6497 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6498 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6500 See also `ring-bell-function'. */);
6502 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6503 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6504 A non-nil value is useful if the terminal can automatically preserve
6505 Emacs's frame display when you reenter Emacs.
6506 It is up to you to set this variable if your terminal can do that. */);
6508 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6509 doc
: /* Name of the window system that Emacs uses for the first frame.
6510 The value is a symbol--for instance, `x' for X windows.
6511 The value is nil if Emacs is using a text-only terminal. */);
6513 DEFVAR_KBOARD ("window-system", Vwindow_system
,
6514 doc
: /* Name of window system through which the selected frame is displayed.
6515 The value is a symbol--for instance, `x' for X windows.
6516 The value is nil if the selected frame is on a text-only-terminal. */);
6518 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6519 doc
: /* The version number of the window system in use.
6520 For X windows, this is 11. */);
6522 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6523 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6525 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6526 doc
: /* Table defining how to output a glyph code to the frame.
6527 If not nil, this is a vector indexed by glyph code to define the glyph.
6528 Each element can be:
6529 integer: a glyph code which this glyph is an alias for.
6530 string: output this glyph using that string (not impl. in X windows).
6531 nil: this glyph mod 524288 is the code of a character to output,
6532 and this glyph / 524288 is the face number (see `face-id') to use
6533 while outputting it. */);
6534 Vglyph_table
= Qnil
;
6536 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6537 doc
: /* Display table to use for buffers that specify none.
6538 See `buffer-display-table' for more information. */);
6539 Vstandard_display_table
= Qnil
;
6541 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6542 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6543 redisplay_dont_pause
= 0;
6545 #if PERIODIC_PREEMPTION_CHECKING
6546 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
6547 doc
: /* *The period in seconds between checking for input during redisplay.
6548 If input is detected, redisplay is pre-empted, and the input is processed.
6549 If nil, never pre-empt redisplay. */);
6550 Vredisplay_preemption_period
= make_float (0.10);
6557 Vinitial_window_system
= Qnil
;
6558 Vwindow_system_version
= Qnil
;
6562 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6563 (do not change this comment) */