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
,
853 EMACS_INT delta
, EMACS_INT delta_bytes
)
855 /* Check that START and END are reasonable values. */
856 xassert (start
>= 0 && start
<= matrix
->nrows
);
857 xassert (end
>= 0 && end
<= matrix
->nrows
);
858 xassert (start
<= end
);
860 for (; start
< end
; ++start
)
861 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
865 /* Enable a range of rows in glyph matrix MATRIX. START and END are
866 the row indices of the first and last + 1 row to enable. If
867 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
870 enable_glyph_matrix_rows (struct glyph_matrix
*matrix
, int start
, int end
, int enabled_p
)
872 xassert (start
<= end
);
873 xassert (start
>= 0 && start
< matrix
->nrows
);
874 xassert (end
>= 0 && end
<= matrix
->nrows
);
876 for (; start
< end
; ++start
)
877 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
883 This empties all rows in MATRIX by setting the enabled_p flag for
884 all rows of the matrix to zero. The function prepare_desired_row
885 will eventually really clear a row when it sees one with a zero
888 Resets update hints to defaults value. The only update hint
889 currently present is the flag MATRIX->no_scrolling_p. */
892 clear_glyph_matrix (struct glyph_matrix
*matrix
)
896 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
897 matrix
->no_scrolling_p
= 0;
902 /* Shift part of the glyph matrix MATRIX of window W up or down.
903 Increment y-positions in glyph rows between START and END by DY,
904 and recompute their visible height. */
907 shift_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int start
, int end
, int dy
)
911 xassert (start
<= end
);
912 xassert (start
>= 0 && start
< matrix
->nrows
);
913 xassert (end
>= 0 && end
<= matrix
->nrows
);
915 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
916 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
918 for (; start
< end
; ++start
)
920 struct glyph_row
*row
= &matrix
->rows
[start
];
923 row
->visible_height
= row
->height
;
926 row
->visible_height
-= min_y
- row
->y
;
927 if (row
->y
+ row
->height
> max_y
)
928 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
933 /* Mark all rows in current matrices of frame F as invalid. Marking
934 invalid is done by setting enabled_p to zero for all rows in a
938 clear_current_matrices (register struct frame
*f
)
940 /* Clear frame current matrix, if we have one. */
941 if (f
->current_matrix
)
942 clear_glyph_matrix (f
->current_matrix
);
944 /* Clear the matrix of the menu bar window, if such a window exists.
945 The menu bar window is currently used to display menus on X when
946 no toolkit support is compiled in. */
947 if (WINDOWP (f
->menu_bar_window
))
948 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
950 /* Clear the matrix of the tool-bar window, if any. */
951 if (WINDOWP (f
->tool_bar_window
))
952 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
954 /* Clear current window matrices. */
955 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
956 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
960 /* Clear out all display lines of F for a coming redisplay. */
963 clear_desired_matrices (register struct frame
*f
)
965 if (f
->desired_matrix
)
966 clear_glyph_matrix (f
->desired_matrix
);
968 if (WINDOWP (f
->menu_bar_window
))
969 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
971 if (WINDOWP (f
->tool_bar_window
))
972 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
974 /* Do it for window matrices. */
975 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
976 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
980 /* Clear matrices in window tree rooted in W. If DESIRED_P is
981 non-zero clear desired matrices, otherwise clear current matrices. */
984 clear_window_matrices (struct window
*w
, int desired_p
)
988 if (!NILP (w
->hchild
))
990 xassert (WINDOWP (w
->hchild
));
991 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
993 else if (!NILP (w
->vchild
))
995 xassert (WINDOWP (w
->vchild
));
996 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1001 clear_glyph_matrix (w
->desired_matrix
);
1004 clear_glyph_matrix (w
->current_matrix
);
1005 w
->window_end_valid
= Qnil
;
1009 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1015 /***********************************************************************
1018 See dispextern.h for an overall explanation of glyph rows.
1019 ***********************************************************************/
1021 /* Clear glyph row ROW. Do it in a way that makes it robust against
1022 changes in the glyph_row structure, i.e. addition or removal of
1023 structure members. */
1025 static struct glyph_row null_row
;
1028 clear_glyph_row (struct glyph_row
*row
)
1030 struct glyph
*p
[1 + LAST_AREA
];
1032 /* Save pointers. */
1033 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1034 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1035 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1036 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1041 /* Restore pointers. */
1042 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1043 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1044 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1045 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1047 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1048 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1049 Redisplay outputs such glyphs, and flickering effects were
1050 the result. This also depended on the contents of memory
1051 returned by xmalloc. If flickering happens again, activate
1052 the code below. If the flickering is gone with that, chances
1053 are that the flickering has the same reason as here. */
1054 memset (p
[0], 0, (char *) p
[LAST_AREA
] - (char *) p
[0]);
1059 /* Make ROW an empty, enabled row of canonical character height,
1060 in window W starting at y-position Y. */
1063 blank_row (struct window
*w
, struct glyph_row
*row
, int y
)
1067 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1068 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1070 clear_glyph_row (row
);
1072 row
->ascent
= row
->phys_ascent
= 0;
1073 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1074 row
->visible_height
= row
->height
;
1077 row
->visible_height
-= min_y
- row
->y
;
1078 if (row
->y
+ row
->height
> max_y
)
1079 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1085 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1086 are the amounts by which to change positions. Note that the first
1087 glyph of the text area of a row can have a buffer position even if
1088 the used count of the text area is zero. Such rows display line
1092 increment_row_positions (struct glyph_row
*row
,
1093 EMACS_INT delta
, EMACS_INT delta_bytes
)
1097 /* Increment start and end positions. */
1098 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1099 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1100 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1101 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1102 CHARPOS (row
->start
.pos
) += delta
;
1103 BYTEPOS (row
->start
.pos
) += delta_bytes
;
1104 CHARPOS (row
->end
.pos
) += delta
;
1105 BYTEPOS (row
->end
.pos
) += delta_bytes
;
1107 if (!row
->enabled_p
)
1110 /* Increment positions in glyphs. */
1111 for (area
= 0; area
< LAST_AREA
; ++area
)
1112 for (i
= 0; i
< row
->used
[area
]; ++i
)
1113 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1114 && row
->glyphs
[area
][i
].charpos
> 0)
1115 row
->glyphs
[area
][i
].charpos
+= delta
;
1117 /* Capture the case of rows displaying a line end. */
1118 if (row
->used
[TEXT_AREA
] == 0
1119 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1120 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1125 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1126 contents, i.e. glyph structure contents are exchanged between A and
1127 B without changing glyph pointers in A and B. */
1130 swap_glyphs_in_rows (a
, b
)
1131 struct glyph_row
*a
, *b
;
1135 for (area
= 0; area
< LAST_AREA
; ++area
)
1137 /* Number of glyphs to swap. */
1138 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1140 /* Start of glyphs in area of row A. */
1141 struct glyph
*glyph_a
= a
->glyphs
[area
];
1143 /* End + 1 of glyphs in area of row A. */
1144 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1146 /* Start of glyphs in area of row B. */
1147 struct glyph
*glyph_b
= b
->glyphs
[area
];
1149 while (glyph_a
< glyph_a_end
)
1151 /* Non-ISO HP/UX compiler doesn't like auto struct
1155 *glyph_a
= *glyph_b
;
1165 /* Exchange pointers to glyph memory between glyph rows A and B. */
1168 swap_glyph_pointers (struct glyph_row
*a
, struct glyph_row
*b
)
1171 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1173 struct glyph
*temp
= a
->glyphs
[i
];
1174 a
->glyphs
[i
] = b
->glyphs
[i
];
1175 b
->glyphs
[i
] = temp
;
1180 /* Copy glyph row structure FROM to glyph row structure TO, except
1181 that glyph pointers in the structures are left unchanged. */
1184 copy_row_except_pointers (struct glyph_row
*to
, struct glyph_row
*from
)
1186 struct glyph
*pointers
[1 + LAST_AREA
];
1188 /* Save glyph pointers of TO. */
1189 memcpy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1191 /* Do a structure assignment. */
1194 /* Restore original pointers of TO. */
1195 memcpy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1199 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1200 TO and FROM are left unchanged. Glyph contents are copied from the
1201 glyph memory of FROM to the glyph memory of TO. Increment buffer
1202 positions in row TO by DELTA/ DELTA_BYTES. */
1205 copy_glyph_row_contents (struct glyph_row
*to
, struct glyph_row
*from
,
1206 EMACS_INT delta
, EMACS_INT delta_bytes
)
1210 /* This is like a structure assignment TO = FROM, except that
1211 glyph pointers in the rows are left unchanged. */
1212 copy_row_except_pointers (to
, from
);
1214 /* Copy glyphs from FROM to TO. */
1215 for (area
= 0; area
< LAST_AREA
; ++area
)
1216 if (from
->used
[area
])
1217 memcpy (to
->glyphs
[area
], from
->glyphs
[area
],
1218 from
->used
[area
] * sizeof (struct glyph
));
1220 /* Increment buffer positions in TO by DELTA. */
1221 increment_row_positions (to
, delta
, delta_bytes
);
1225 /* Assign glyph row FROM to glyph row TO. This works like a structure
1226 assignment TO = FROM, except that glyph pointers are not copied but
1227 exchanged between TO and FROM. Pointers must be exchanged to avoid
1231 assign_row (struct glyph_row
*to
, struct glyph_row
*from
)
1233 swap_glyph_pointers (to
, from
);
1234 copy_row_except_pointers (to
, from
);
1238 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1239 a row in a window matrix, is a slice of the glyph memory of the
1240 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1241 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1242 memory of FRAME_ROW. */
1247 glyph_row_slice_p (window_row
, frame_row
)
1248 struct glyph_row
*window_row
, *frame_row
;
1250 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1251 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1252 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1254 return (frame_glyph_start
<= window_glyph_start
1255 && window_glyph_start
< frame_glyph_end
);
1258 #endif /* GLYPH_DEBUG */
1262 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1263 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1264 in WINDOW_MATRIX is found satisfying the condition. */
1266 static struct glyph_row
*
1267 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1268 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1273 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1275 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1276 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1277 frame_matrix
->rows
+ row
))
1280 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1285 /* Prepare ROW for display. Desired rows are cleared lazily,
1286 i.e. they are only marked as to be cleared by setting their
1287 enabled_p flag to zero. When a row is to be displayed, a prior
1288 call to this function really clears it. */
1291 prepare_desired_row (struct glyph_row
*row
)
1293 if (!row
->enabled_p
)
1295 unsigned rp
= row
->reversed_p
;
1297 clear_glyph_row (row
);
1299 row
->reversed_p
= rp
;
1304 /* Return a hash code for glyph row ROW. */
1307 line_hash_code (struct glyph_row
*row
)
1313 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1314 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1318 int c
= glyph
->u
.ch
;
1319 int face_id
= glyph
->face_id
;
1320 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1322 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1323 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1335 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1336 the number of characters in the line. If must_write_spaces is
1337 zero, leading and trailing spaces are ignored. */
1340 line_draw_cost (struct glyph_matrix
*matrix
, int vpos
)
1342 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1343 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1344 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1346 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1347 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1349 /* Ignore trailing and leading spaces if we can. */
1350 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1352 /* Skip from the end over trailing spaces. */
1353 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1356 /* All blank line. */
1360 /* Skip over leading spaces. */
1361 while (CHAR_GLYPH_SPACE_P (*beg
))
1365 /* If we don't have a glyph-table, each glyph is one character,
1366 so return the number of glyphs. */
1367 if (glyph_table_base
== 0)
1371 /* Otherwise, scan the glyphs and accumulate their total length
1378 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1380 if (GLYPH_INVALID_P (g
)
1381 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1384 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1394 /* Test two glyph rows A and B for equality. Value is non-zero if A
1395 and B have equal contents. W is the window to which the glyphs
1396 rows A and B belong. It is needed here to test for partial row
1397 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1398 flags of A and B, too. */
1401 row_equal_p (struct window
*w
, struct glyph_row
*a
, struct glyph_row
*b
, int mouse_face_p
)
1405 else if (a
->hash
!= b
->hash
)
1409 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1412 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1415 /* Compare glyphs. */
1416 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1418 if (a
->used
[area
] != b
->used
[area
])
1421 a_glyph
= a
->glyphs
[area
];
1422 a_end
= a_glyph
+ a
->used
[area
];
1423 b_glyph
= b
->glyphs
[area
];
1425 while (a_glyph
< a_end
1426 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1427 ++a_glyph
, ++b_glyph
;
1429 if (a_glyph
!= a_end
)
1433 if (a
->fill_line_p
!= b
->fill_line_p
1434 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1435 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1436 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1437 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1438 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1439 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1440 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1441 || a
->overlapped_p
!= b
->overlapped_p
1442 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1443 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1444 || a
->reversed_p
!= b
->reversed_p
1445 /* Different partially visible characters on left margin. */
1447 /* Different height. */
1448 || a
->ascent
!= b
->ascent
1449 || a
->phys_ascent
!= b
->phys_ascent
1450 || a
->phys_height
!= b
->phys_height
1451 || a
->visible_height
!= b
->visible_height
)
1460 /***********************************************************************
1463 See dispextern.h for an overall explanation of glyph pools.
1464 ***********************************************************************/
1466 /* Allocate a glyph_pool structure. The structure returned is
1467 initialized with zeros. The global variable glyph_pool_count is
1468 incremented for each pool allocated. */
1470 static struct glyph_pool
*
1471 new_glyph_pool (void)
1473 struct glyph_pool
*result
;
1475 /* Allocate a new glyph_pool and clear it. */
1476 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1477 memset (result
, 0, sizeof *result
);
1479 /* For memory leak and double deletion checking. */
1486 /* Free a glyph_pool structure POOL. The function may be called with
1487 a null POOL pointer. The global variable glyph_pool_count is
1488 decremented with every pool structure freed. If this count gets
1489 negative, more structures were freed than allocated, i.e. one
1490 structure must have been freed more than once or a bogus pointer
1491 was passed to free_glyph_pool. */
1494 free_glyph_pool (struct glyph_pool
*pool
)
1498 /* More freed than allocated? */
1500 xassert (glyph_pool_count
>= 0);
1502 xfree (pool
->glyphs
);
1508 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1509 columns we need. This function never shrinks a pool. The only
1510 case in which this would make sense, would be when a frame's size
1511 is changed from a large value to a smaller one. But, if someone
1512 does it once, we can expect that he will do it again.
1514 Value is non-zero if the pool changed in a way which makes
1515 re-adjusting window glyph matrices necessary. */
1518 realloc_glyph_pool (struct glyph_pool
*pool
, struct dim matrix_dim
)
1523 changed_p
= (pool
->glyphs
== 0
1524 || matrix_dim
.height
!= pool
->nrows
1525 || matrix_dim
.width
!= pool
->ncolumns
);
1527 /* Enlarge the glyph pool. */
1528 needed
= matrix_dim
.width
* matrix_dim
.height
;
1529 if (needed
> pool
->nglyphs
)
1531 int size
= needed
* sizeof (struct glyph
);
1535 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1536 memset (pool
->glyphs
+ pool
->nglyphs
, 0,
1537 size
- pool
->nglyphs
* sizeof (struct glyph
));
1541 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1542 memset (pool
->glyphs
, 0, size
);
1545 pool
->nglyphs
= needed
;
1548 /* Remember the number of rows and columns because (a) we use them
1549 to do sanity checks, and (b) the number of columns determines
1550 where rows in the frame matrix start---this must be available to
1551 determine pointers to rows of window sub-matrices. */
1552 pool
->nrows
= matrix_dim
.height
;
1553 pool
->ncolumns
= matrix_dim
.width
;
1560 /***********************************************************************
1562 ***********************************************************************/
1567 /* Flush standard output. This is sometimes useful to call from the debugger.
1568 XXX Maybe this should be changed to flush the current terminal instead of
1579 /* Check that no glyph pointers have been lost in MATRIX. If a
1580 pointer has been lost, e.g. by using a structure assignment between
1581 rows, at least one pointer must occur more than once in the rows of
1585 check_matrix_pointer_lossage (matrix
)
1586 struct glyph_matrix
*matrix
;
1590 for (i
= 0; i
< matrix
->nrows
; ++i
)
1591 for (j
= 0; j
< matrix
->nrows
; ++j
)
1593 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1594 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1598 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1601 matrix_row (matrix
, row
)
1602 struct glyph_matrix
*matrix
;
1605 xassert (matrix
&& matrix
->rows
);
1606 xassert (row
>= 0 && row
< matrix
->nrows
);
1608 /* That's really too slow for normal testing because this function
1609 is called almost everywhere. Although---it's still astonishingly
1610 fast, so it is valuable to have for debugging purposes. */
1612 check_matrix_pointer_lossage (matrix
);
1615 return matrix
->rows
+ row
;
1619 #if 0 /* This function makes invalid assumptions when text is
1620 partially invisible. But it might come handy for debugging
1623 /* Check invariants that must hold for an up to date current matrix of
1627 check_matrix_invariants (w
)
1630 struct glyph_matrix
*matrix
= w
->current_matrix
;
1631 int yb
= window_text_bottom_y (w
);
1632 struct glyph_row
*row
= matrix
->rows
;
1633 struct glyph_row
*last_text_row
= NULL
;
1634 struct buffer
*saved
= current_buffer
;
1635 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1638 /* This can sometimes happen for a fresh window. */
1639 if (matrix
->nrows
< 2)
1642 set_buffer_temp (buffer
);
1644 /* Note: last row is always reserved for the mode line. */
1645 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1646 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1648 struct glyph_row
*next
= row
+ 1;
1650 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1651 last_text_row
= row
;
1653 /* Check that character and byte positions are in sync. */
1654 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1655 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1656 xassert (BYTEPOS (row
->start
.pos
)
1657 == CHAR_TO_BYTE (CHARPOS (row
->start
.pos
)));
1659 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1660 have such a position temporarily in case of a minibuffer
1661 displaying something like `[Sole completion]' at its end. */
1662 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1664 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1665 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1666 xassert (BYTEPOS (row
->end
.pos
)
1667 == CHAR_TO_BYTE (CHARPOS (row
->end
.pos
)));
1670 /* Check that end position of `row' is equal to start position
1672 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1674 xassert (MATRIX_ROW_END_CHARPOS (row
)
1675 == MATRIX_ROW_START_CHARPOS (next
));
1676 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1677 == MATRIX_ROW_START_BYTEPOS (next
));
1678 xassert (CHARPOS (row
->end
.pos
) == CHARPOS (next
->start
.pos
));
1679 xassert (BYTEPOS (row
->end
.pos
) == BYTEPOS (next
->start
.pos
));
1684 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1685 xassert (w
->desired_matrix
->rows
!= NULL
);
1686 set_buffer_temp (saved
);
1691 #endif /* GLYPH_DEBUG != 0 */
1695 /**********************************************************************
1696 Allocating/ Adjusting Glyph Matrices
1697 **********************************************************************/
1699 /* Allocate glyph matrices over a window tree for a frame-based
1702 X and Y are column/row within the frame glyph matrix where
1703 sub-matrices for the window tree rooted at WINDOW must be
1704 allocated. DIM_ONLY_P non-zero means that the caller of this
1705 function is only interested in the result matrix dimension, and
1706 matrix adjustments should not be performed.
1708 The function returns the total width/height of the sub-matrices of
1709 the window tree. If called on a frame root window, the computation
1710 will take the mini-buffer window into account.
1712 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1714 NEW_LEAF_MATRIX set if any window in the tree did not have a
1715 glyph matrices yet, and
1717 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1718 any window in the tree will be changed or have been changed (see
1721 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1724 Windows are arranged into chains of windows on the same level
1725 through the next fields of window structures. Such a level can be
1726 either a sequence of horizontally adjacent windows from left to
1727 right, or a sequence of vertically adjacent windows from top to
1728 bottom. Each window in a horizontal sequence can be either a leaf
1729 window or a vertical sequence; a window in a vertical sequence can
1730 be either a leaf or a horizontal sequence. All windows in a
1731 horizontal sequence have the same height, and all windows in a
1732 vertical sequence have the same width.
1734 This function uses, for historical reasons, a more general
1735 algorithm to determine glyph matrix dimensions that would be
1738 The matrix height of a horizontal sequence is determined by the
1739 maximum height of any matrix in the sequence. The matrix width of
1740 a horizontal sequence is computed by adding up matrix widths of
1741 windows in the sequence.
1743 |<------- result width ------->|
1744 +---------+----------+---------+ ---
1747 +---------+ | | result height
1752 The matrix width of a vertical sequence is the maximum matrix width
1753 of any window in the sequence. Its height is computed by adding up
1754 matrix heights of windows in the sequence.
1756 |<---- result width -->|
1764 +------------+---------+ |
1767 +------------+---------+ --- */
1769 /* Bit indicating that a new matrix will be allocated or has been
1772 #define NEW_LEAF_MATRIX (1 << 0)
1774 /* Bit indicating that a matrix will or has changed its location or
1777 #define CHANGED_LEAF_MATRIX (1 << 1)
1780 allocate_matrices_for_frame_redisplay (Lisp_Object window
, int x
, int y
,
1781 int dim_only_p
, int *window_change_flags
)
1783 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1785 int wmax
= 0, hmax
= 0;
1789 int in_horz_combination_p
;
1791 /* What combination is WINDOW part of? Compute this once since the
1792 result is the same for all windows in the `next' chain. The
1793 special case of a root window (parent equal to nil) is treated
1794 like a vertical combination because a root window's `next'
1795 points to the mini-buffer window, if any, which is arranged
1796 vertically below other windows. */
1797 in_horz_combination_p
1798 = (!NILP (XWINDOW (window
)->parent
)
1799 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1801 /* For WINDOW and all windows on the same level. */
1804 w
= XWINDOW (window
);
1806 /* Get the dimension of the window sub-matrix for W, depending
1807 on whether this is a combination or a leaf window. */
1808 if (!NILP (w
->hchild
))
1809 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1811 window_change_flags
);
1812 else if (!NILP (w
->vchild
))
1813 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1815 window_change_flags
);
1818 /* If not already done, allocate sub-matrix structures. */
1819 if (w
->desired_matrix
== NULL
)
1821 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1822 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1823 *window_change_flags
|= NEW_LEAF_MATRIX
;
1826 /* Width and height MUST be chosen so that there are no
1827 holes in the frame matrix. */
1828 dim
.width
= required_matrix_width (w
);
1829 dim
.height
= required_matrix_height (w
);
1831 /* Will matrix be re-allocated? */
1832 if (x
!= w
->desired_matrix
->matrix_x
1833 || y
!= w
->desired_matrix
->matrix_y
1834 || dim
.width
!= w
->desired_matrix
->matrix_w
1835 || dim
.height
!= w
->desired_matrix
->matrix_h
1836 || (margin_glyphs_to_reserve (w
, dim
.width
,
1837 w
->left_margin_cols
)
1838 != w
->desired_matrix
->left_margin_glyphs
)
1839 || (margin_glyphs_to_reserve (w
, dim
.width
,
1840 w
->right_margin_cols
)
1841 != w
->desired_matrix
->right_margin_glyphs
))
1842 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1844 /* Actually change matrices, if allowed. Do not consider
1845 CHANGED_LEAF_MATRIX computed above here because the pool
1846 may have been changed which we don't now here. We trust
1847 that we only will be called with DIM_ONLY_P != 0 when
1851 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1852 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1856 /* If we are part of a horizontal combination, advance x for
1857 windows to the right of W; otherwise advance y for windows
1859 if (in_horz_combination_p
)
1864 /* Remember maximum glyph matrix dimensions. */
1865 wmax
= max (wmax
, dim
.width
);
1866 hmax
= max (hmax
, dim
.height
);
1868 /* Next window on same level. */
1871 while (!NILP (window
));
1873 /* Set `total' to the total glyph matrix dimension of this window
1874 level. In a vertical combination, the width is the width of the
1875 widest window; the height is the y we finally reached, corrected
1876 by the y we started with. In a horizontal combination, the total
1877 height is the height of the tallest window, and the width is the
1878 x we finally reached, corrected by the x we started with. */
1879 if (in_horz_combination_p
)
1881 total
.width
= x
- x0
;
1882 total
.height
= hmax
;
1887 total
.height
= y
- y0
;
1894 /* Return the required height of glyph matrices for window W. */
1897 required_matrix_height (struct window
*w
)
1899 #ifdef HAVE_WINDOW_SYSTEM
1900 struct frame
*f
= XFRAME (w
->frame
);
1902 if (FRAME_WINDOW_P (f
))
1904 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1905 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
1906 return (((window_pixel_height
+ ch_height
- 1)
1907 / ch_height
) * w
->nrows_scale_factor
1908 /* One partially visible line at the top and
1909 bottom of the window. */
1911 /* 2 for header and mode line. */
1914 #endif /* HAVE_WINDOW_SYSTEM */
1916 return WINDOW_TOTAL_LINES (w
);
1920 /* Return the required width of glyph matrices for window W. */
1923 required_matrix_width (struct window
*w
)
1925 #ifdef HAVE_WINDOW_SYSTEM
1926 struct frame
*f
= XFRAME (w
->frame
);
1927 if (FRAME_WINDOW_P (f
))
1929 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
1930 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
1932 /* Compute number of glyphs needed in a glyph row. */
1933 return (((window_pixel_width
+ ch_width
- 1)
1934 / ch_width
) * w
->ncols_scale_factor
1935 /* 2 partially visible columns in the text area. */
1937 /* One partially visible column at the right
1938 edge of each marginal area. */
1941 #endif /* HAVE_WINDOW_SYSTEM */
1943 return XINT (w
->total_cols
);
1947 /* Allocate window matrices for window-based redisplay. W is the
1948 window whose matrices must be allocated/reallocated. */
1951 allocate_matrices_for_window_redisplay (struct window
*w
)
1955 if (!NILP (w
->vchild
))
1956 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
1957 else if (!NILP (w
->hchild
))
1958 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
1961 /* W is a leaf window. */
1964 /* If matrices are not yet allocated, allocate them now. */
1965 if (w
->desired_matrix
== NULL
)
1967 w
->desired_matrix
= new_glyph_matrix (NULL
);
1968 w
->current_matrix
= new_glyph_matrix (NULL
);
1971 dim
.width
= required_matrix_width (w
);
1972 dim
.height
= required_matrix_height (w
);
1973 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
1974 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
1977 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
1982 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
1983 do it for all frames; otherwise do it just for the given frame.
1984 This function must be called when a new frame is created, its size
1985 changes, or its window configuration changes. */
1988 adjust_glyphs (struct frame
*f
)
1990 /* Block input so that expose events and other events that access
1991 glyph matrices are not processed while we are changing them. */
1995 adjust_frame_glyphs (f
);
1998 Lisp_Object tail
, lisp_frame
;
2000 FOR_EACH_FRAME (tail
, lisp_frame
)
2001 adjust_frame_glyphs (XFRAME (lisp_frame
));
2008 /* Adjust frame glyphs when Emacs is initialized.
2010 To be called from init_display.
2012 We need a glyph matrix because redraw will happen soon.
2013 Unfortunately, window sizes on selected_frame are not yet set to
2014 meaningful values. I believe we can assume that there are only two
2015 windows on the frame---the mini-buffer and the root window. Frame
2016 height and width seem to be correct so far. So, set the sizes of
2017 windows to estimated values. */
2020 adjust_frame_glyphs_initially (void)
2022 struct frame
*sf
= SELECTED_FRAME ();
2023 struct window
*root
= XWINDOW (sf
->root_window
);
2024 struct window
*mini
= XWINDOW (root
->next
);
2025 int frame_lines
= FRAME_LINES (sf
);
2026 int frame_cols
= FRAME_COLS (sf
);
2027 int top_margin
= FRAME_TOP_MARGIN (sf
);
2029 /* Do it for the root window. */
2030 XSETFASTINT (root
->top_line
, top_margin
);
2031 XSETFASTINT (root
->total_cols
, frame_cols
);
2032 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2034 /* Do it for the mini-buffer window. */
2035 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2036 XSETFASTINT (mini
->total_cols
, frame_cols
);
2037 set_window_height (root
->next
, 1, 0);
2039 adjust_frame_glyphs (sf
);
2040 glyphs_initialized_initially_p
= 1;
2044 /* Allocate/reallocate glyph matrices of a single frame F. */
2047 adjust_frame_glyphs (struct frame
*f
)
2049 if (FRAME_WINDOW_P (f
))
2050 adjust_frame_glyphs_for_window_redisplay (f
);
2052 adjust_frame_glyphs_for_frame_redisplay (f
);
2054 /* Don't forget the message buffer and the buffer for
2055 decode_mode_spec. */
2056 adjust_frame_message_buffer (f
);
2057 adjust_decode_mode_spec_buffer (f
);
2059 f
->glyphs_initialized_p
= 1;
2062 /* Return 1 if any window in the tree has nonzero window margins. See
2063 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2065 showing_window_margins_p (struct window
*w
)
2069 if (!NILP (w
->hchild
))
2071 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2074 else if (!NILP (w
->vchild
))
2076 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2079 else if (!NILP (w
->left_margin_cols
)
2080 || !NILP (w
->right_margin_cols
))
2083 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2089 /* In the window tree with root W, build current matrices of leaf
2090 windows from the frame's current matrix. */
2093 fake_current_matrices (Lisp_Object window
)
2097 for (; !NILP (window
); window
= w
->next
)
2099 w
= XWINDOW (window
);
2101 if (!NILP (w
->hchild
))
2102 fake_current_matrices (w
->hchild
);
2103 else if (!NILP (w
->vchild
))
2104 fake_current_matrices (w
->vchild
);
2108 struct frame
*f
= XFRAME (w
->frame
);
2109 struct glyph_matrix
*m
= w
->current_matrix
;
2110 struct glyph_matrix
*fm
= f
->current_matrix
;
2112 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2113 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2115 for (i
= 0; i
< m
->matrix_h
; ++i
)
2117 struct glyph_row
*r
= m
->rows
+ i
;
2118 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2120 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2121 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2123 r
->enabled_p
= fr
->enabled_p
;
2126 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2127 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2128 r
->used
[TEXT_AREA
] = (m
->matrix_w
2129 - r
->used
[LEFT_MARGIN_AREA
]
2130 - r
->used
[RIGHT_MARGIN_AREA
]);
2139 /* Save away the contents of frame F's current frame matrix. Value is
2140 a glyph matrix holding the contents of F's current frame matrix. */
2142 static struct glyph_matrix
*
2143 save_current_matrix (struct frame
*f
)
2146 struct glyph_matrix
*saved
;
2148 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2149 memset (saved
, 0, sizeof *saved
);
2150 saved
->nrows
= f
->current_matrix
->nrows
;
2151 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2152 * sizeof *saved
->rows
);
2153 memset (saved
->rows
, 0, saved
->nrows
* sizeof *saved
->rows
);
2155 for (i
= 0; i
< saved
->nrows
; ++i
)
2157 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2158 struct glyph_row
*to
= saved
->rows
+ i
;
2159 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2160 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2161 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2162 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2169 /* Restore the contents of frame F's current frame matrix from SAVED,
2170 and free memory associated with SAVED. */
2173 restore_current_matrix (struct frame
*f
, struct glyph_matrix
*saved
)
2177 for (i
= 0; i
< saved
->nrows
; ++i
)
2179 struct glyph_row
*from
= saved
->rows
+ i
;
2180 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2181 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2182 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2183 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2184 xfree (from
->glyphs
[TEXT_AREA
]);
2187 xfree (saved
->rows
);
2193 /* Allocate/reallocate glyph matrices of a single frame F for
2194 frame-based redisplay. */
2197 adjust_frame_glyphs_for_frame_redisplay (struct frame
*f
)
2199 struct dim matrix_dim
;
2201 int window_change_flags
;
2204 if (!FRAME_LIVE_P (f
))
2207 top_window_y
= FRAME_TOP_MARGIN (f
);
2209 /* Allocate glyph pool structures if not already done. */
2210 if (f
->desired_pool
== NULL
)
2212 f
->desired_pool
= new_glyph_pool ();
2213 f
->current_pool
= new_glyph_pool ();
2216 /* Allocate frames matrix structures if needed. */
2217 if (f
->desired_matrix
== NULL
)
2219 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2220 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2223 /* Compute window glyph matrices. (This takes the mini-buffer
2224 window into account). The result is the size of the frame glyph
2225 matrix needed. The variable window_change_flags is set to a bit
2226 mask indicating whether new matrices will be allocated or
2227 existing matrices change their size or location within the frame
2229 window_change_flags
= 0;
2231 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2234 &window_change_flags
);
2236 /* Add in menu bar lines, if any. */
2237 matrix_dim
.height
+= top_window_y
;
2239 /* Enlarge pools as necessary. */
2240 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2241 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2243 /* Set up glyph pointers within window matrices. Do this only if
2244 absolutely necessary since it requires a frame redraw. */
2245 if (pool_changed_p
|| window_change_flags
)
2247 /* Do it for window matrices. */
2248 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2250 &window_change_flags
);
2252 /* Size of frame matrices must equal size of frame. Note
2253 that we are called for X frames with window widths NOT equal
2254 to the frame width (from CHANGE_FRAME_SIZE_1). */
2255 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2256 && matrix_dim
.height
== FRAME_LINES (f
));
2258 /* Pointers to glyph memory in glyph rows are exchanged during
2259 the update phase of redisplay, which means in general that a
2260 frame's current matrix consists of pointers into both the
2261 desired and current glyph pool of the frame. Adjusting a
2262 matrix sets the frame matrix up so that pointers are all into
2263 the same pool. If we want to preserve glyph contents of the
2264 current matrix over a call to adjust_glyph_matrix, we must
2265 make a copy of the current glyphs, and restore the current
2266 matrix' contents from that copy. */
2267 if (display_completed
2268 && !FRAME_GARBAGED_P (f
)
2269 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2270 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2271 /* For some reason, the frame glyph matrix gets corrupted if
2272 any of the windows contain margins. I haven't been able
2273 to hunt down the reason, but for the moment this prevents
2274 the problem from manifesting. -- cyd */
2275 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2277 struct glyph_matrix
*copy
= save_current_matrix (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 restore_current_matrix (f
, copy
);
2281 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2285 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2286 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2287 SET_FRAME_GARBAGED (f
);
2293 /* Allocate/reallocate glyph matrices of a single frame F for
2294 window-based redisplay. */
2297 adjust_frame_glyphs_for_window_redisplay (struct frame
*f
)
2301 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2303 /* Allocate/reallocate window matrices. */
2304 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2306 #ifdef HAVE_X_WINDOWS
2307 /* Allocate/ reallocate matrices of the dummy window used to display
2308 the menu bar under X when no X toolkit support is available. */
2309 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2311 /* Allocate a dummy window if not already done. */
2312 if (NILP (f
->menu_bar_window
))
2314 f
->menu_bar_window
= make_window ();
2315 w
= XWINDOW (f
->menu_bar_window
);
2316 XSETFRAME (w
->frame
, f
);
2317 w
->pseudo_window_p
= 1;
2320 w
= XWINDOW (f
->menu_bar_window
);
2322 /* Set window dimensions to frame dimensions and allocate or
2323 adjust glyph matrices of W. */
2324 XSETFASTINT (w
->top_line
, 0);
2325 XSETFASTINT (w
->left_col
, 0);
2326 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2327 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2328 allocate_matrices_for_window_redisplay (w
);
2330 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2331 #endif /* HAVE_X_WINDOWS */
2334 /* Allocate/ reallocate matrices of the tool bar window. If we
2335 don't have a tool bar window yet, make one. */
2336 if (NILP (f
->tool_bar_window
))
2338 f
->tool_bar_window
= make_window ();
2339 w
= XWINDOW (f
->tool_bar_window
);
2340 XSETFRAME (w
->frame
, f
);
2341 w
->pseudo_window_p
= 1;
2344 w
= XWINDOW (f
->tool_bar_window
);
2346 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2347 XSETFASTINT (w
->left_col
, 0);
2348 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2349 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2350 allocate_matrices_for_window_redisplay (w
);
2355 /* Adjust/ allocate message buffer of frame F.
2357 Note that the message buffer is never freed. Since I could not
2358 find a free in 19.34, I assume that freeing it would be
2359 problematic in some way and don't do it either.
2361 (Implementation note: It should be checked if we can free it
2362 eventually without causing trouble). */
2365 adjust_frame_message_buffer (struct frame
*f
)
2367 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2369 if (FRAME_MESSAGE_BUF (f
))
2371 char *buffer
= FRAME_MESSAGE_BUF (f
);
2372 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2373 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2376 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2380 /* Re-allocate buffer for decode_mode_spec on frame F. */
2383 adjust_decode_mode_spec_buffer (struct frame
*f
)
2385 f
->decode_mode_spec_buffer
2386 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2387 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2392 /**********************************************************************
2393 Freeing Glyph Matrices
2394 **********************************************************************/
2396 /* Free glyph memory for a frame F. F may be null. This function can
2397 be called for the same frame more than once. The root window of
2398 F may be nil when this function is called. This is the case when
2399 the function is called when F is destroyed. */
2402 free_glyphs (struct frame
*f
)
2404 if (f
&& f
->glyphs_initialized_p
)
2406 /* Block interrupt input so that we don't get surprised by an X
2407 event while we're in an inconsistent state. */
2409 f
->glyphs_initialized_p
= 0;
2411 /* Release window sub-matrices. */
2412 if (!NILP (f
->root_window
))
2413 free_window_matrices (XWINDOW (f
->root_window
));
2415 /* Free the dummy window for menu bars without X toolkit and its
2417 if (!NILP (f
->menu_bar_window
))
2419 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2420 free_glyph_matrix (w
->desired_matrix
);
2421 free_glyph_matrix (w
->current_matrix
);
2422 w
->desired_matrix
= w
->current_matrix
= NULL
;
2423 f
->menu_bar_window
= Qnil
;
2426 /* Free the tool bar window and its glyph matrices. */
2427 if (!NILP (f
->tool_bar_window
))
2429 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2430 free_glyph_matrix (w
->desired_matrix
);
2431 free_glyph_matrix (w
->current_matrix
);
2432 w
->desired_matrix
= w
->current_matrix
= NULL
;
2433 f
->tool_bar_window
= Qnil
;
2436 /* Release frame glyph matrices. Reset fields to zero in
2437 case we are called a second time. */
2438 if (f
->desired_matrix
)
2440 free_glyph_matrix (f
->desired_matrix
);
2441 free_glyph_matrix (f
->current_matrix
);
2442 f
->desired_matrix
= f
->current_matrix
= NULL
;
2445 /* Release glyph pools. */
2446 if (f
->desired_pool
)
2448 free_glyph_pool (f
->desired_pool
);
2449 free_glyph_pool (f
->current_pool
);
2450 f
->desired_pool
= f
->current_pool
= NULL
;
2458 /* Free glyph sub-matrices in the window tree rooted at W. This
2459 function may be called with a null pointer, and it may be called on
2460 the same tree more than once. */
2463 free_window_matrices (struct window
*w
)
2467 if (!NILP (w
->hchild
))
2468 free_window_matrices (XWINDOW (w
->hchild
));
2469 else if (!NILP (w
->vchild
))
2470 free_window_matrices (XWINDOW (w
->vchild
));
2473 /* This is a leaf window. Free its memory and reset fields
2474 to zero in case this function is called a second time for
2476 free_glyph_matrix (w
->current_matrix
);
2477 free_glyph_matrix (w
->desired_matrix
);
2478 w
->current_matrix
= w
->desired_matrix
= NULL
;
2481 /* Next window on same level. */
2482 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2487 /* Check glyph memory leaks. This function is called from
2488 shut_down_emacs. Note that frames are not destroyed when Emacs
2489 exits. We therefore free all glyph memory for all active frames
2490 explicitly and check that nothing is left allocated. */
2493 check_glyph_memory (void)
2495 Lisp_Object tail
, frame
;
2497 /* Free glyph memory for all frames. */
2498 FOR_EACH_FRAME (tail
, frame
)
2499 free_glyphs (XFRAME (frame
));
2501 /* Check that nothing is left allocated. */
2502 if (glyph_matrix_count
)
2504 if (glyph_pool_count
)
2510 /**********************************************************************
2511 Building a Frame Matrix
2512 **********************************************************************/
2514 /* Most of the redisplay code works on glyph matrices attached to
2515 windows. This is a good solution most of the time, but it is not
2516 suitable for terminal code. Terminal output functions cannot rely
2517 on being able to set an arbitrary terminal window. Instead they
2518 must be provided with a view of the whole frame, i.e. the whole
2519 screen. We build such a view by constructing a frame matrix from
2520 window matrices in this section.
2522 Windows that must be updated have their must_be_update_p flag set.
2523 For all such windows, their desired matrix is made part of the
2524 desired frame matrix. For other windows, their current matrix is
2525 made part of the desired frame matrix.
2527 +-----------------+----------------+
2528 | desired | desired |
2530 +-----------------+----------------+
2533 +----------------------------------+
2535 Desired window matrices can be made part of the frame matrix in a
2536 cheap way: We exploit the fact that the desired frame matrix and
2537 desired window matrices share their glyph memory. This is not
2538 possible for current window matrices. Their glyphs are copied to
2539 the desired frame matrix. The latter is equivalent to
2540 preserve_other_columns in the old redisplay.
2542 Used glyphs counters for frame matrix rows are the result of adding
2543 up glyph lengths of the window matrices. A line in the frame
2544 matrix is enabled, if a corresponding line in a window matrix is
2547 After building the desired frame matrix, it will be passed to
2548 terminal code, which will manipulate both the desired and current
2549 frame matrix. Changes applied to the frame's current matrix have
2550 to be visible in current window matrices afterwards, of course.
2552 This problem is solved like this:
2554 1. Window and frame matrices share glyphs. Window matrices are
2555 constructed in a way that their glyph contents ARE the glyph
2556 contents needed in a frame matrix. Thus, any modification of
2557 glyphs done in terminal code will be reflected in window matrices
2560 2. Exchanges of rows in a frame matrix done by terminal code are
2561 intercepted by hook functions so that corresponding row operations
2562 on window matrices can be performed. This is necessary because we
2563 use pointers to glyphs in glyph row structures. To satisfy the
2564 assumption of point 1 above that glyphs are updated implicitly in
2565 window matrices when they are manipulated via the frame matrix,
2566 window and frame matrix must of course agree where to find the
2567 glyphs for their rows. Possible manipulations that must be
2568 mirrored are assignments of rows of the desired frame matrix to the
2569 current frame matrix and scrolling the current frame matrix. */
2571 /* Build frame F's desired matrix from window matrices. Only windows
2572 which have the flag must_be_updated_p set have to be updated. Menu
2573 bar lines of a frame are not covered by window matrices, so make
2574 sure not to touch them in this function. */
2577 build_frame_matrix (struct frame
*f
)
2581 /* F must have a frame matrix when this function is called. */
2582 xassert (!FRAME_WINDOW_P (f
));
2584 /* Clear all rows in the frame matrix covered by window matrices.
2585 Menu bar lines are not covered by windows. */
2586 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2587 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2589 /* Build the matrix by walking the window tree. */
2590 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2591 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2595 /* Walk a window tree, building a frame matrix MATRIX from window
2596 matrices. W is the root of a window tree. */
2599 build_frame_matrix_from_window_tree (struct glyph_matrix
*matrix
, struct window
*w
)
2603 if (!NILP (w
->hchild
))
2604 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2605 else if (!NILP (w
->vchild
))
2606 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2608 build_frame_matrix_from_leaf_window (matrix
, w
);
2610 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2615 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2616 desired frame matrix built. W is a leaf window whose desired or
2617 current matrix is to be added to FRAME_MATRIX. W's flag
2618 must_be_updated_p determines which matrix it contributes to
2619 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2620 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2621 Adding a desired matrix means setting up used counters and such in
2622 frame rows, while adding a current window matrix to FRAME_MATRIX
2623 means copying glyphs. The latter case corresponds to
2624 preserve_other_columns in the old redisplay. */
2627 build_frame_matrix_from_leaf_window (struct glyph_matrix
*frame_matrix
, struct window
*w
)
2629 struct glyph_matrix
*window_matrix
;
2630 int window_y
, frame_y
;
2631 /* If non-zero, a glyph to insert at the right border of W. */
2632 GLYPH right_border_glyph
;
2634 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2636 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2637 if (w
->must_be_updated_p
)
2639 window_matrix
= w
->desired_matrix
;
2641 /* Decide whether we want to add a vertical border glyph. */
2642 if (!WINDOW_RIGHTMOST_P (w
))
2644 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2647 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2649 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2650 && GLYPH_CODE_CHAR_VALID_P (gc
))
2652 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2653 spec_glyph_lookup_face (w
, &right_border_glyph
);
2656 if (GLYPH_FACE (right_border_glyph
) <= 0)
2657 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2661 window_matrix
= w
->current_matrix
;
2663 /* For all rows in the window matrix and corresponding rows in the
2666 frame_y
= window_matrix
->matrix_y
;
2667 while (window_y
< window_matrix
->nrows
)
2669 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2670 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2671 int current_row_p
= window_matrix
== w
->current_matrix
;
2673 /* Fill up the frame row with spaces up to the left margin of the
2675 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2677 /* Fill up areas in the window matrix row with spaces. */
2678 fill_up_glyph_row_with_spaces (window_row
);
2680 /* If only part of W's desired matrix has been built, and
2681 window_row wasn't displayed, use the corresponding current
2683 if (window_matrix
== w
->desired_matrix
2684 && !window_row
->enabled_p
)
2686 window_row
= w
->current_matrix
->rows
+ window_y
;
2692 /* Copy window row to frame row. */
2693 memcpy (frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2694 window_row
->glyphs
[0],
2695 window_matrix
->matrix_w
* sizeof (struct glyph
));
2699 xassert (window_row
->enabled_p
);
2701 /* Only when a desired row has been displayed, we want
2702 the corresponding frame row to be updated. */
2703 frame_row
->enabled_p
= 1;
2705 /* Maybe insert a vertical border between horizontally adjacent
2707 if (GLYPH_CHAR (right_border_glyph
) != 0)
2709 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2710 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2714 /* Window row window_y must be a slice of frame row
2716 xassert (glyph_row_slice_p (window_row
, frame_row
));
2718 /* If rows are in sync, we don't have to copy glyphs because
2719 frame and window share glyphs. */
2721 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2722 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2726 /* Set number of used glyphs in the frame matrix. Since we fill
2727 up with spaces, and visit leaf windows from left to right it
2728 can be done simply. */
2729 frame_row
->used
[TEXT_AREA
]
2730 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2738 /* Given a user-specified glyph, possibly including a Lisp-level face
2739 ID, return a glyph that has a realized face ID.
2740 This is used for glyphs displayed specially and not part of the text;
2741 for instance, vertical separators, truncation markers, etc. */
2744 spec_glyph_lookup_face (struct window
*w
, GLYPH
*glyph
)
2746 int lface_id
= GLYPH_FACE (*glyph
);
2747 /* Convert the glyph's specified face to a realized (cache) face. */
2750 int face_id
= merge_faces (XFRAME (w
->frame
),
2751 Qt
, lface_id
, DEFAULT_FACE_ID
);
2752 SET_GLYPH_FACE (*glyph
, face_id
);
2756 /* Add spaces to a glyph row ROW in a window matrix.
2758 Each row has the form:
2760 +---------+-----------------------------+------------+
2761 | left | text | right |
2762 +---------+-----------------------------+------------+
2764 Left and right marginal areas are optional. This function adds
2765 spaces to areas so that there are no empty holes between areas.
2766 In other words: If the right area is not empty, the text area
2767 is filled up with spaces up to the right area. If the text area
2768 is not empty, the left area is filled up.
2770 To be called for frame-based redisplay, only. */
2773 fill_up_glyph_row_with_spaces (struct glyph_row
*row
)
2775 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2776 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2777 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2781 /* Fill area AREA of glyph row ROW with spaces. To be called for
2782 frame-based redisplay only. */
2785 fill_up_glyph_row_area_with_spaces (struct glyph_row
*row
, int area
)
2787 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2789 struct glyph
*end
= row
->glyphs
[area
+ 1];
2790 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2793 *text
++ = space_glyph
;
2794 row
->used
[area
] = text
- row
->glyphs
[area
];
2799 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2800 reached. In frame matrices only one area, TEXT_AREA, is used. */
2803 fill_up_frame_row_with_spaces (struct glyph_row
*row
, int upto
)
2805 int i
= row
->used
[TEXT_AREA
];
2806 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2809 glyph
[i
++] = space_glyph
;
2811 row
->used
[TEXT_AREA
] = i
;
2816 /**********************************************************************
2817 Mirroring operations on frame matrices in window matrices
2818 **********************************************************************/
2820 /* Set frame being updated via frame-based redisplay to F. This
2821 function must be called before updates to make explicit that we are
2822 working on frame matrices or not. */
2825 set_frame_matrix_frame (struct frame
*f
)
2827 frame_matrix_frame
= f
;
2831 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2832 DESIRED_MATRIX is the desired matrix corresponding to
2833 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2834 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2835 frame_matrix_frame is non-null, this indicates that the exchange is
2836 done in frame matrices, and that we have to perform analogous
2837 operations in window matrices of frame_matrix_frame. */
2840 make_current (struct glyph_matrix
*desired_matrix
, struct glyph_matrix
*current_matrix
, int row
)
2842 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2843 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2844 int mouse_face_p
= current_row
->mouse_face_p
;
2846 /* Do current_row = desired_row. This exchanges glyph pointers
2847 between both rows, and does a structure assignment otherwise. */
2848 assign_row (current_row
, desired_row
);
2850 /* Enable current_row to mark it as valid. */
2851 current_row
->enabled_p
= 1;
2852 current_row
->mouse_face_p
= mouse_face_p
;
2854 /* If we are called on frame matrices, perform analogous operations
2855 for window matrices. */
2856 if (frame_matrix_frame
)
2857 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2861 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2862 W's frame which has been made current (by swapping pointers between
2863 current and desired matrix). Perform analogous operations in the
2864 matrices of leaf windows in the window tree rooted at W. */
2867 mirror_make_current (struct window
*w
, int frame_row
)
2871 if (!NILP (w
->hchild
))
2872 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2873 else if (!NILP (w
->vchild
))
2874 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2877 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2878 here because the checks performed in debug mode there
2879 will not allow the conversion. */
2880 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2882 /* If FRAME_ROW is within W, assign the desired row to the
2883 current row (exchanging glyph pointers). */
2884 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2886 struct glyph_row
*current_row
2887 = MATRIX_ROW (w
->current_matrix
, row
);
2888 struct glyph_row
*desired_row
2889 = MATRIX_ROW (w
->desired_matrix
, row
);
2891 if (desired_row
->enabled_p
)
2892 assign_row (current_row
, desired_row
);
2894 swap_glyph_pointers (desired_row
, current_row
);
2895 current_row
->enabled_p
= 1;
2897 /* Set the Y coordinate of the mode/header line's row.
2898 It is needed in draw_row_with_mouse_face to find the
2899 screen coordinates. (Window-based redisplay sets
2900 this in update_window, but no one seems to do that
2901 for frame-based redisplay.) */
2902 if (current_row
->mode_line_p
)
2903 current_row
->y
= row
;
2907 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2912 /* Perform row dance after scrolling. We are working on the range of
2913 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2914 including) in MATRIX. COPY_FROM is a vector containing, for each
2915 row I in the range 0 <= I < NLINES, the index of the original line
2916 to move to I. This index is relative to the row range, i.e. 0 <=
2917 index < NLINES. RETAINED_P is a vector containing zero for each
2918 row 0 <= I < NLINES which is empty.
2920 This function is called from do_scrolling and do_direct_scrolling. */
2923 mirrored_line_dance (struct glyph_matrix
*matrix
, int unchanged_at_top
, int nlines
,
2924 int *copy_from
, char *retained_p
)
2926 /* A copy of original rows. */
2927 struct glyph_row
*old_rows
;
2929 /* Rows to assign to. */
2930 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2934 /* Make a copy of the original rows. */
2935 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2936 memcpy (old_rows
, new_rows
, nlines
* sizeof *old_rows
);
2938 /* Assign new rows, maybe clear lines. */
2939 for (i
= 0; i
< nlines
; ++i
)
2941 int enabled_before_p
= new_rows
[i
].enabled_p
;
2943 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2944 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2945 new_rows
[i
] = old_rows
[copy_from
[i
]];
2946 new_rows
[i
].enabled_p
= enabled_before_p
;
2948 /* RETAINED_P is zero for empty lines. */
2949 if (!retained_p
[copy_from
[i
]])
2950 new_rows
[i
].enabled_p
= 0;
2953 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2954 if (frame_matrix_frame
)
2955 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2956 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2960 /* Synchronize glyph pointers in the current matrix of window W with
2961 the current frame matrix. */
2964 sync_window_with_frame_matrix_rows (struct window
*w
)
2966 struct frame
*f
= XFRAME (w
->frame
);
2967 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2968 int left
, right
, x
, width
;
2970 /* Preconditions: W must be a leaf window on a tty frame. */
2971 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2972 xassert (!FRAME_WINDOW_P (f
));
2974 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
2975 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
2976 x
= w
->current_matrix
->matrix_x
;
2977 width
= w
->current_matrix
->matrix_w
;
2979 window_row
= w
->current_matrix
->rows
;
2980 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
2981 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
2983 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
2985 window_row
->glyphs
[LEFT_MARGIN_AREA
]
2986 = frame_row
->glyphs
[0] + x
;
2987 window_row
->glyphs
[TEXT_AREA
]
2988 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
2989 window_row
->glyphs
[LAST_AREA
]
2990 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
2991 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
2992 = window_row
->glyphs
[LAST_AREA
] - right
;
2997 /* Return the window in the window tree rooted in W containing frame
2998 row ROW. Value is null if none is found. */
3001 frame_row_to_window (struct window
*w
, int row
)
3003 struct window
*found
= NULL
;
3007 if (!NILP (w
->hchild
))
3008 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3009 else if (!NILP (w
->vchild
))
3010 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3011 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3012 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3015 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3022 /* Perform a line dance in the window tree rooted at W, after
3023 scrolling a frame matrix in mirrored_line_dance.
3025 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3026 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3027 COPY_FROM is a vector containing, for each row I in the range 0 <=
3028 I < NLINES, the index of the original line to move to I. This
3029 index is relative to the row range, i.e. 0 <= index < NLINES.
3030 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3034 mirror_line_dance (struct window
*w
, int unchanged_at_top
, int nlines
, int *copy_from
, char *retained_p
)
3038 if (!NILP (w
->hchild
))
3039 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3040 nlines
, copy_from
, retained_p
);
3041 else if (!NILP (w
->vchild
))
3042 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3043 nlines
, copy_from
, retained_p
);
3046 /* W is a leaf window, and we are working on its current
3048 struct glyph_matrix
*m
= w
->current_matrix
;
3050 struct glyph_row
*old_rows
;
3052 /* Make a copy of the original rows of matrix m. */
3053 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3054 memcpy (old_rows
, m
->rows
, m
->nrows
* sizeof *old_rows
);
3056 for (i
= 0; i
< nlines
; ++i
)
3058 /* Frame relative line assigned to. */
3059 int frame_to
= i
+ unchanged_at_top
;
3061 /* Frame relative line assigned. */
3062 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3064 /* Window relative line assigned to. */
3065 int window_to
= frame_to
- m
->matrix_y
;
3067 /* Window relative line assigned. */
3068 int window_from
= frame_from
- m
->matrix_y
;
3070 /* Is assigned line inside window? */
3071 int from_inside_window_p
3072 = window_from
>= 0 && window_from
< m
->matrix_h
;
3074 /* Is assigned to line inside window? */
3075 int to_inside_window_p
3076 = window_to
>= 0 && window_to
< m
->matrix_h
;
3078 if (from_inside_window_p
&& to_inside_window_p
)
3080 /* Enabled setting before assignment. */
3081 int enabled_before_p
;
3083 /* Do the assignment. The enabled_p flag is saved
3084 over the assignment because the old redisplay did
3086 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3087 m
->rows
[window_to
] = old_rows
[window_from
];
3088 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3090 /* If frame line is empty, window line is empty, too. */
3091 if (!retained_p
[copy_from
[i
]])
3092 m
->rows
[window_to
].enabled_p
= 0;
3094 else if (to_inside_window_p
)
3096 /* A copy between windows. This is an infrequent
3097 case not worth optimizing. */
3098 struct frame
*f
= XFRAME (w
->frame
);
3099 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3101 struct glyph_matrix
*m2
;
3104 w2
= frame_row_to_window (root
, frame_from
);
3105 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3106 -nw', FROM_FRAME sometimes has no associated window.
3107 This check avoids a segfault if W2 is null. */
3110 m2
= w2
->current_matrix
;
3111 m2_from
= frame_from
- m2
->matrix_y
;
3112 copy_row_except_pointers (m
->rows
+ window_to
,
3113 m2
->rows
+ m2_from
);
3115 /* If frame line is empty, window line is empty, too. */
3116 if (!retained_p
[copy_from
[i
]])
3117 m
->rows
[window_to
].enabled_p
= 0;
3121 else if (from_inside_window_p
)
3125 /* If there was a copy between windows, make sure glyph
3126 pointers are in sync with the frame matrix. */
3128 sync_window_with_frame_matrix_rows (w
);
3130 /* Check that no pointers are lost. */
3134 /* Next window on same level. */
3135 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3142 /* Check that window and frame matrices agree about their
3143 understanding where glyphs of the rows are to find. For each
3144 window in the window tree rooted at W, check that rows in the
3145 matrices of leaf window agree with their frame matrices about
3149 check_window_matrix_pointers (w
)
3154 if (!NILP (w
->hchild
))
3155 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3156 else if (!NILP (w
->vchild
))
3157 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3160 struct frame
*f
= XFRAME (w
->frame
);
3161 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3162 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3165 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3170 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3171 a window and FRAME_MATRIX is the corresponding frame matrix. For
3172 each row in WINDOW_MATRIX check that it's a slice of the
3173 corresponding frame row. If it isn't, abort. */
3176 check_matrix_pointers (window_matrix
, frame_matrix
)
3177 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3179 /* Row number in WINDOW_MATRIX. */
3182 /* Row number corresponding to I in FRAME_MATRIX. */
3183 int j
= window_matrix
->matrix_y
;
3185 /* For all rows check that the row in the window matrix is a
3186 slice of the row in the frame matrix. If it isn't we didn't
3187 mirror an operation on the frame matrix correctly. */
3188 while (i
< window_matrix
->nrows
)
3190 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3191 frame_matrix
->rows
+ j
))
3197 #endif /* GLYPH_DEBUG != 0 */
3201 /**********************************************************************
3202 VPOS and HPOS translations
3203 **********************************************************************/
3207 /* Translate vertical position VPOS which is relative to window W to a
3208 vertical position relative to W's frame. */
3211 window_to_frame_vpos (w
, vpos
)
3215 struct frame
*f
= XFRAME (w
->frame
);
3217 xassert (!FRAME_WINDOW_P (f
));
3218 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3219 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3220 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3225 /* Translate horizontal position HPOS which is relative to window W to
3226 a horizontal position relative to W's frame. */
3229 window_to_frame_hpos (w
, hpos
)
3233 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3234 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3238 #endif /* GLYPH_DEBUG */
3242 /**********************************************************************
3244 **********************************************************************/
3246 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3247 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3252 CHECK_LIVE_FRAME (frame
);
3255 /* Ignore redraw requests, if frame has no glyphs yet.
3256 (Implementation note: It still has to be checked why we are
3257 called so early here). */
3258 if (!glyphs_initialized_initially_p
)
3263 if (FRAME_MSDOS_P (f
))
3264 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3267 clear_current_matrices (f
);
3269 if (FRAME_TERMCAP_P (f
))
3270 fflush (FRAME_TTY (f
)->output
);
3271 windows_or_buffers_changed
++;
3272 /* Mark all windows as inaccurate, so that every window will have
3273 its redisplay done. */
3274 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3275 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3281 /* Redraw frame F. This is nothing more than a call to the Lisp
3282 function redraw-frame. */
3285 redraw_frame (struct frame
*f
)
3288 XSETFRAME (frame
, f
);
3289 Fredraw_frame (frame
);
3293 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3294 doc
: /* Clear and redisplay all visible frames. */)
3297 Lisp_Object tail
, frame
;
3299 FOR_EACH_FRAME (tail
, frame
)
3300 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3301 Fredraw_frame (frame
);
3307 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3308 visible frames marked as garbaged. */
3311 redraw_garbaged_frames (void)
3313 Lisp_Object tail
, frame
;
3315 FOR_EACH_FRAME (tail
, frame
)
3316 if (FRAME_VISIBLE_P (XFRAME (frame
))
3317 && FRAME_GARBAGED_P (XFRAME (frame
)))
3318 Fredraw_frame (frame
);
3323 /***********************************************************************
3325 ***********************************************************************/
3327 /* Update frame F based on the data in desired matrices.
3329 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3330 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3333 Value is non-zero if redisplay was stopped due to pending input. */
3336 update_frame (struct frame
*f
, int force_p
, int inhibit_hairy_id_p
)
3338 /* 1 means display has been paused because of pending input. */
3340 struct window
*root_window
= XWINDOW (f
->root_window
);
3342 if (redisplay_dont_pause
)
3344 #if PERIODIC_PREEMPTION_CHECKING
3345 else if (NILP (Vredisplay_preemption_period
))
3347 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3350 double p
= XFLOATINT (Vredisplay_preemption_period
);
3353 if (detect_input_pending_ignore_squeezables ())
3360 usec
= (p
- sec
) * 1000000;
3362 EMACS_GET_TIME (tm
);
3363 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3364 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3368 if (FRAME_WINDOW_P (f
))
3370 /* We are working on window matrix basis. All windows whose
3371 flag must_be_updated_p is set have to be updated. */
3373 /* Record that we are not working on frame matrices. */
3374 set_frame_matrix_frame (NULL
);
3376 /* Update all windows in the window tree of F, maybe stopping
3377 when pending input is detected. */
3380 /* Update the menu bar on X frames that don't have toolkit
3382 if (WINDOWP (f
->menu_bar_window
))
3383 update_window (XWINDOW (f
->menu_bar_window
), 1);
3385 /* Update the tool-bar window, if present. */
3386 if (WINDOWP (f
->tool_bar_window
))
3388 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3390 /* Update tool-bar window. */
3391 if (w
->must_be_updated_p
)
3395 update_window (w
, 1);
3396 w
->must_be_updated_p
= 0;
3398 /* Swap tool-bar strings. We swap because we want to
3400 tem
= f
->current_tool_bar_string
;
3401 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3402 f
->desired_tool_bar_string
= tem
;
3407 /* Update windows. */
3408 paused_p
= update_window_tree (root_window
, force_p
);
3411 /* This flush is a performance bottleneck under X,
3412 and it doesn't seem to be necessary anyway (in general).
3413 It is necessary when resizing the window with the mouse, or
3414 at least the fringes are not redrawn in a timely manner. ++kfs */
3415 if (f
->force_flush_display_p
)
3417 FRAME_RIF (f
)->flush_display (f
);
3418 f
->force_flush_display_p
= 0;
3423 /* We are working on frame matrix basis. Set the frame on whose
3424 frame matrix we operate. */
3425 set_frame_matrix_frame (f
);
3427 /* Build F's desired matrix from window matrices. */
3428 build_frame_matrix (f
);
3430 /* Update the display */
3432 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3435 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3437 if (FRAME_TTY (f
)->termscript
)
3438 fflush (FRAME_TTY (f
)->termscript
);
3439 if (FRAME_TERMCAP_P (f
))
3440 fflush (FRAME_TTY (f
)->output
);
3443 /* Check window matrices for lost pointers. */
3445 check_window_matrix_pointers (root_window
);
3446 add_frame_display_history (f
, paused_p
);
3450 #if PERIODIC_PREEMPTION_CHECKING
3453 /* Reset flags indicating that a window should be updated. */
3454 set_window_update_flags (root_window
, 0);
3456 display_completed
= !paused_p
;
3462 /************************************************************************
3463 Window-based updates
3464 ************************************************************************/
3466 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3467 don't stop updating when input is pending. */
3470 update_window_tree (struct window
*w
, int force_p
)
3474 while (w
&& !paused_p
)
3476 if (!NILP (w
->hchild
))
3477 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3478 else if (!NILP (w
->vchild
))
3479 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3480 else if (w
->must_be_updated_p
)
3481 paused_p
|= update_window (w
, force_p
);
3483 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3490 /* Update window W if its flag must_be_updated_p is non-zero. If
3491 FORCE_P is non-zero, don't stop updating if input is pending. */
3494 update_single_window (struct window
*w
, int force_p
)
3496 if (w
->must_be_updated_p
)
3498 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3500 /* Record that this is not a frame-based redisplay. */
3501 set_frame_matrix_frame (NULL
);
3503 if (redisplay_dont_pause
)
3505 #if PERIODIC_PREEMPTION_CHECKING
3506 else if (NILP (Vredisplay_preemption_period
))
3508 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3511 double p
= XFLOATINT (Vredisplay_preemption_period
);
3515 usec
= (p
- sec
) * 1000000;
3517 EMACS_GET_TIME (tm
);
3518 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3519 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3525 update_window (w
, force_p
);
3528 /* Reset flag in W. */
3529 w
->must_be_updated_p
= 0;
3533 #ifdef HAVE_WINDOW_SYSTEM
3535 /* Redraw lines from the current matrix of window W that are
3536 overlapped by other rows. YB is bottom-most y-position in W. */
3539 redraw_overlapped_rows (struct window
*w
, int yb
)
3542 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3544 /* If rows overlapping others have been changed, the rows being
3545 overlapped have to be redrawn. This won't draw lines that have
3546 already been drawn in update_window_line because overlapped_p in
3547 desired rows is 0, so after row assignment overlapped_p in
3548 current rows is 0. */
3549 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3551 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3553 if (!row
->enabled_p
)
3555 else if (row
->mode_line_p
)
3558 if (row
->overlapped_p
)
3560 enum glyph_row_area area
;
3562 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3565 updated_area
= area
;
3566 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3567 area
== TEXT_AREA
? row
->x
: 0);
3568 if (row
->used
[area
])
3569 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3571 FRAME_RIF (f
)->clear_end_of_line (-1);
3574 row
->overlapped_p
= 0;
3577 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3583 /* Redraw lines from the current matrix of window W that overlap
3584 others. YB is bottom-most y-position in W. */
3587 redraw_overlapping_rows (struct window
*w
, int yb
)
3590 struct glyph_row
*row
;
3591 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3593 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3595 row
= w
->current_matrix
->rows
+ i
;
3597 if (!row
->enabled_p
)
3599 else if (row
->mode_line_p
)
3602 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3604 if (row
->overlapping_p
)
3608 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
3609 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
3610 overlaps
|= OVERLAPS_PRED
;
3611 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
3612 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
3613 overlaps
|= OVERLAPS_SUCC
;
3617 if (row
->used
[LEFT_MARGIN_AREA
])
3618 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
3620 if (row
->used
[TEXT_AREA
])
3621 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
3623 if (row
->used
[RIGHT_MARGIN_AREA
])
3624 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
3626 /* Record in neighbour rows that ROW overwrites part of
3628 if (overlaps
& OVERLAPS_PRED
)
3629 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3630 if (overlaps
& OVERLAPS_SUCC
)
3631 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3640 #endif /* HAVE_WINDOW_SYSTEM */
3645 /* Check that no row in the current matrix of window W is enabled
3646 which is below what's displayed in the window. */
3649 check_current_matrix_flags (struct window
*w
)
3651 int last_seen_p
= 0;
3652 int i
, yb
= window_text_bottom_y (w
);
3654 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
3656 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
3657 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3659 else if (last_seen_p
&& row
->enabled_p
)
3664 #endif /* GLYPH_DEBUG */
3667 /* Update display of window W. FORCE_P non-zero means that we should
3668 not stop when detecting pending input. */
3671 update_window (struct window
*w
, int force_p
)
3673 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3675 #if !PERIODIC_PREEMPTION_CHECKING
3676 int preempt_count
= baud_rate
/ 2400 + 1;
3678 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3680 /* Check that W's frame doesn't have glyph matrices. */
3681 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
3684 /* Check pending input the first time so that we can quickly return. */
3685 #if !PERIODIC_PREEMPTION_CHECKING
3687 detect_input_pending_ignore_squeezables ();
3690 /* If forced to complete the update, or if no input is pending, do
3692 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
3694 struct glyph_row
*row
, *end
;
3695 struct glyph_row
*mode_line_row
;
3696 struct glyph_row
*header_line_row
;
3697 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
3699 rif
->update_window_begin_hook (w
);
3700 yb
= window_text_bottom_y (w
);
3702 /* If window has a header line, update it before everything else.
3703 Adjust y-positions of other rows by the header line height. */
3704 row
= desired_matrix
->rows
;
3705 end
= row
+ desired_matrix
->nrows
- 1;
3707 if (row
->mode_line_p
)
3709 header_line_row
= row
;
3713 header_line_row
= NULL
;
3715 /* Update the mode line, if necessary. */
3716 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3717 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3719 mode_line_row
->y
= yb
;
3720 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3722 &mouse_face_overwritten_p
);
3725 /* Find first enabled row. Optimizations in redisplay_internal
3726 may lead to an update with only one row enabled. There may
3727 be also completely empty matrices. */
3728 while (row
< end
&& !row
->enabled_p
)
3731 /* Try reusing part of the display by copying. */
3732 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
3734 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
3737 /* All rows were found to be equal. */
3743 /* We've scrolled the display. */
3749 /* Update the rest of the lines. */
3750 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
3753 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
3756 /* We'll have to play a little bit with when to
3757 detect_input_pending. If it's done too often,
3758 scrolling large windows with repeated scroll-up
3759 commands will too quickly pause redisplay. */
3760 #if PERIODIC_PREEMPTION_CHECKING
3764 EMACS_GET_TIME (tm
);
3765 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
3766 if (EMACS_TIME_NEG_P (dif
))
3768 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3769 if (detect_input_pending_ignore_squeezables ())
3774 if (!force_p
&& ++n_updated
% preempt_count
== 0)
3775 detect_input_pending_ignore_squeezables ();
3777 changed_p
|= update_window_line (w
, vpos
,
3778 &mouse_face_overwritten_p
);
3780 /* Mark all rows below the last visible one in the current
3781 matrix as invalid. This is necessary because of
3782 variable line heights. Consider the case of three
3783 successive redisplays, where the first displays 5
3784 lines, the second 3 lines, and the third 5 lines again.
3785 If the second redisplay wouldn't mark rows in the
3786 current matrix invalid, the third redisplay might be
3787 tempted to optimize redisplay based on lines displayed
3788 in the first redisplay. */
3789 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3790 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
3791 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
3794 /* Was display preempted? */
3795 paused_p
= row
< end
;
3799 /* Update the header line after scrolling because a new header
3800 line would otherwise overwrite lines at the top of the window
3801 that can be scrolled. */
3802 if (header_line_row
&& header_line_row
->enabled_p
)
3804 header_line_row
->y
= 0;
3805 update_window_line (w
, 0, &mouse_face_overwritten_p
);
3808 /* Fix the appearance of overlapping/overlapped rows. */
3809 if (!paused_p
&& !w
->pseudo_window_p
)
3811 #ifdef HAVE_WINDOW_SYSTEM
3812 if (changed_p
&& rif
->fix_overlapping_area
)
3814 redraw_overlapped_rows (w
, yb
);
3815 redraw_overlapping_rows (w
, yb
);
3819 /* Make cursor visible at cursor position of W. */
3820 set_window_cursor_after_update (w
);
3822 #if 0 /* Check that current matrix invariants are satisfied. This is
3823 for debugging only. See the comment of check_matrix_invariants. */
3824 IF_DEBUG (check_matrix_invariants (w
));
3829 /* Remember the redisplay method used to display the matrix. */
3830 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
3833 #ifdef HAVE_WINDOW_SYSTEM
3834 update_window_fringes (w
, 0);
3837 /* End the update of window W. Don't set the cursor if we
3838 paused updating the display because in this case,
3839 set_window_cursor_after_update hasn't been called, and
3840 output_cursor doesn't contain the cursor location. */
3841 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
3847 /* check_current_matrix_flags (w); */
3848 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
3851 clear_glyph_matrix (desired_matrix
);
3857 /* Update the display of area AREA in window W, row number VPOS.
3858 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
3861 update_marginal_area (struct window
*w
, int area
, int vpos
)
3863 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3864 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3866 /* Let functions in xterm.c know what area subsequent X positions
3867 will be relative to. */
3868 updated_area
= area
;
3870 /* Set cursor to start of glyphs, write them, and clear to the end
3871 of the area. I don't think that something more sophisticated is
3872 necessary here, since marginal areas will not be the default. */
3873 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
3874 if (desired_row
->used
[area
])
3875 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
3876 rif
->clear_end_of_line (-1);
3880 /* Update the display of the text area of row VPOS in window W.
3881 Value is non-zero if display has changed. */
3884 update_text_area (struct window
*w
, int vpos
)
3886 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
3887 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3888 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3891 /* Let functions in xterm.c know what area subsequent X positions
3892 will be relative to. */
3893 updated_area
= TEXT_AREA
;
3895 /* If rows are at different X or Y, or rows have different height,
3896 or the current row is marked invalid, write the entire line. */
3897 if (!current_row
->enabled_p
3898 || desired_row
->y
!= current_row
->y
3899 || desired_row
->ascent
!= current_row
->ascent
3900 || desired_row
->phys_ascent
!= current_row
->phys_ascent
3901 || desired_row
->phys_height
!= current_row
->phys_height
3902 || desired_row
->visible_height
!= current_row
->visible_height
3903 || current_row
->overlapped_p
3904 /* This next line is necessary for correctly redrawing
3905 mouse-face areas after scrolling and other operations.
3906 However, it causes excessive flickering when mouse is moved
3907 across the mode line. Luckily, turning it off for the mode
3908 line doesn't seem to hurt anything. -- cyd.
3909 But it is still needed for the header line. -- kfs. */
3910 || (current_row
->mouse_face_p
3911 && !(current_row
->mode_line_p
&& vpos
> 0))
3912 || current_row
->x
!= desired_row
->x
)
3914 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
3916 if (desired_row
->used
[TEXT_AREA
])
3917 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
3918 desired_row
->used
[TEXT_AREA
]);
3920 /* Clear to end of window. */
3921 rif
->clear_end_of_line (-1);
3924 /* This erases the cursor. We do this here because
3925 notice_overwritten_cursor cannot easily check this, which
3926 might indicate that the whole functionality of
3927 notice_overwritten_cursor would better be implemented here.
3928 On the other hand, we need notice_overwritten_cursor as long
3929 as mouse highlighting is done asynchronously outside of
3931 if (vpos
== w
->phys_cursor
.vpos
)
3932 w
->phys_cursor_on_p
= 0;
3937 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
3938 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
3939 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
3940 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
3941 int abort_skipping
= 0;
3943 /* If the desired row extends its face to the text area end, and
3944 unless the current row also does so at the same position,
3945 make sure we write at least one glyph, so that the face
3946 extension actually takes place. */
3947 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
3948 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
3949 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
3950 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
3953 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
3957 /* Loop over glyphs that current and desired row may have
3961 int can_skip_p
= !abort_skipping
;
3963 /* Skip over glyphs that both rows have in common. These
3964 don't have to be written. We can't skip if the last
3965 current glyph overlaps the glyph to its right. For
3966 example, consider a current row of `if ' with the `f' in
3967 Courier bold so that it overlaps the ` ' to its right.
3968 If the desired row is ` ', we would skip over the space
3969 after the `if' and there would remain a pixel from the
3970 `f' on the screen. */
3971 if (overlapping_glyphs_p
&& i
> 0)
3973 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
3976 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
3978 can_skip_p
= (right
== 0 && !abort_skipping
);
3986 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
3988 x
+= desired_glyph
->pixel_width
;
3989 ++desired_glyph
, ++current_glyph
, ++i
;
3992 /* Consider the case that the current row contains "xxx
3993 ppp ggg" in italic Courier font, and the desired row
3994 is "xxx ggg". The character `p' has lbearing, `g'
3995 has not. The loop above will stop in front of the
3996 first `p' in the current row. If we would start
3997 writing glyphs there, we wouldn't erase the lbearing
3998 of the `p'. The rest of the lbearing problem is then
3999 taken care of by draw_glyphs. */
4000 if (overlapping_glyphs_p
4002 && i
< current_row
->used
[TEXT_AREA
]
4003 && (current_row
->used
[TEXT_AREA
]
4004 != desired_row
->used
[TEXT_AREA
]))
4008 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4010 while (left
> 0 && i
> 0)
4012 --i
, --desired_glyph
, --current_glyph
;
4013 x
-= desired_glyph
->pixel_width
;
4014 left
-= desired_glyph
->pixel_width
;
4017 /* Abort the skipping algorithm if we end up before
4018 our starting point, to avoid looping (bug#1070).
4019 This can happen when the lbearing is larger than
4021 abort_skipping
= (i
< start_hpos
);
4025 /* Try to avoid writing the entire rest of the desired row
4026 by looking for a resync point. This mainly prevents
4027 mode line flickering in the case the mode line is in
4028 fixed-pitch font, which it usually will be. */
4029 if (i
< desired_row
->used
[TEXT_AREA
])
4031 int start_x
= x
, start_hpos
= i
;
4032 struct glyph
*start
= desired_glyph
;
4034 int skip_first_p
= !can_skip_p
;
4036 /* Find the next glyph that's equal again. */
4039 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4042 x
+= desired_glyph
->pixel_width
;
4043 current_x
+= current_glyph
->pixel_width
;
4044 ++desired_glyph
, ++current_glyph
, ++i
;
4048 if (i
== start_hpos
|| x
!= current_x
)
4052 desired_glyph
= start
;
4056 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4057 rif
->write_glyphs (start
, i
- start_hpos
);
4062 /* Write the rest. */
4063 if (i
< desired_row
->used
[TEXT_AREA
])
4065 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4066 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4070 /* Maybe clear to end of line. */
4071 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4073 /* If new row extends to the end of the text area, nothing
4074 has to be cleared, if and only if we did a write_glyphs
4075 above. This is made sure by setting desired_stop_pos
4076 appropriately above. */
4077 xassert (i
< desired_row
->used
[TEXT_AREA
]
4078 || ((desired_row
->used
[TEXT_AREA
]
4079 == current_row
->used
[TEXT_AREA
])
4080 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4082 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4084 /* If old row extends to the end of the text area, clear. */
4085 if (i
>= desired_row
->used
[TEXT_AREA
])
4086 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4087 desired_row
->pixel_width
);
4088 rif
->clear_end_of_line (-1);
4091 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4093 /* Otherwise clear to the end of the old row. Everything
4094 after that position should be clear already. */
4097 if (i
>= desired_row
->used
[TEXT_AREA
])
4098 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4099 desired_row
->pixel_width
);
4101 /* If cursor is displayed at the end of the line, make sure
4102 it's cleared. Nowadays we don't have a phys_cursor_glyph
4103 with which to erase the cursor (because this method
4104 doesn't work with lbearing/rbearing), so we must do it
4106 if (vpos
== w
->phys_cursor
.vpos
4107 && (desired_row
->reversed_p
4108 ? (w
->phys_cursor
.hpos
< 0)
4109 : (w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])))
4111 w
->phys_cursor_on_p
= 0;
4115 x
= current_row
->pixel_width
;
4116 rif
->clear_end_of_line (x
);
4125 /* Update row VPOS in window W. Value is non-zero if display has been
4129 update_window_line (struct window
*w
, int vpos
, int *mouse_face_overwritten_p
)
4131 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4132 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4133 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4136 /* Set the row being updated. This is important to let xterm.c
4137 know what line height values are in effect. */
4138 updated_row
= desired_row
;
4140 /* A row can be completely invisible in case a desired matrix was
4141 built with a vscroll and then make_cursor_line_fully_visible shifts
4142 the matrix. Make sure to make such rows current anyway, since
4143 we need the correct y-position, for example, in the current matrix. */
4144 if (desired_row
->mode_line_p
4145 || desired_row
->visible_height
> 0)
4147 xassert (desired_row
->enabled_p
);
4149 /* Update display of the left margin area, if there is one. */
4150 if (!desired_row
->full_width_p
4151 && !NILP (w
->left_margin_cols
))
4154 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4157 /* Update the display of the text area. */
4158 if (update_text_area (w
, vpos
))
4161 if (current_row
->mouse_face_p
)
4162 *mouse_face_overwritten_p
= 1;
4165 /* Update display of the right margin area, if there is one. */
4166 if (!desired_row
->full_width_p
4167 && !NILP (w
->right_margin_cols
))
4170 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4173 /* Draw truncation marks etc. */
4174 if (!current_row
->enabled_p
4175 || desired_row
->y
!= current_row
->y
4176 || desired_row
->visible_height
!= current_row
->visible_height
4177 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4178 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4179 || current_row
->redraw_fringe_bitmaps_p
4180 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4181 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4182 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4183 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4184 rif
->after_update_window_line_hook (desired_row
);
4187 /* Update current_row from desired_row. */
4188 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4194 /* Set the cursor after an update of window W. This function may only
4195 be called from update_window. */
4198 set_window_cursor_after_update (struct window
*w
)
4200 struct frame
*f
= XFRAME (w
->frame
);
4201 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4202 int cx
, cy
, vpos
, hpos
;
4204 /* Not intended for frame matrix updates. */
4205 xassert (FRAME_WINDOW_P (f
));
4207 if (cursor_in_echo_area
4208 && !NILP (echo_area_buffer
[0])
4209 /* If we are showing a message instead of the mini-buffer,
4210 show the cursor for the message instead. */
4211 && XWINDOW (minibuf_window
) == w
4212 && EQ (minibuf_window
, echo_area_window
)
4213 /* These cases apply only to the frame that contains
4214 the active mini-buffer window. */
4215 && FRAME_HAS_MINIBUF_P (f
)
4216 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4218 cx
= cy
= vpos
= hpos
= 0;
4220 if (cursor_in_echo_area
>= 0)
4222 /* If the mini-buffer is several lines high, find the last
4223 line that has any text on it. Note: either all lines
4224 are enabled or none. Otherwise we wouldn't be able to
4226 struct glyph_row
*row
, *last_row
;
4227 struct glyph
*glyph
;
4228 int yb
= window_text_bottom_y (w
);
4231 row
= w
->current_matrix
->rows
;
4232 while (row
->enabled_p
4233 && (last_row
== NULL
4234 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4236 if (row
->used
[TEXT_AREA
]
4237 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4244 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4245 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4247 while (last
> start
&& last
->charpos
< 0)
4250 for (glyph
= start
; glyph
< last
; ++glyph
)
4252 cx
+= glyph
->pixel_width
;
4257 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4265 hpos
= w
->cursor
.hpos
;
4266 vpos
= w
->cursor
.vpos
;
4269 /* Window cursor can be out of sync for horizontally split windows. */
4270 hpos
= max (-1, hpos
); /* -1 is for when cursor is on the left fringe */
4271 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4272 vpos
= max (0, vpos
);
4273 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4274 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4278 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4279 tree rooted at W. */
4282 set_window_update_flags (struct window
*w
, int on_p
)
4286 if (!NILP (w
->hchild
))
4287 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4288 else if (!NILP (w
->vchild
))
4289 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4291 w
->must_be_updated_p
= on_p
;
4293 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4299 /***********************************************************************
4300 Window-Based Scrolling
4301 ***********************************************************************/
4303 /* Structure describing rows in scrolling_window. */
4307 /* Number of occurrences of this row in desired and current matrix. */
4308 int old_uses
, new_uses
;
4310 /* Vpos of row in new matrix. */
4311 int new_line_number
;
4313 /* Bucket index of this row_entry in the hash table row_table. */
4316 /* The row described by this entry. */
4317 struct glyph_row
*row
;
4319 /* Hash collision chain. */
4320 struct row_entry
*next
;
4323 /* A pool to allocate row_entry structures from, and the size of the
4324 pool. The pool is reallocated in scrolling_window when we find
4325 that we need a larger one. */
4327 static struct row_entry
*row_entry_pool
;
4328 static int row_entry_pool_size
;
4330 /* Index of next free entry in row_entry_pool. */
4332 static int row_entry_idx
;
4334 /* The hash table used during scrolling, and the table's size. This
4335 table is used to quickly identify equal rows in the desired and
4338 static struct row_entry
**row_table
;
4339 static int row_table_size
;
4341 /* Vectors of pointers to row_entry structures belonging to the
4342 current and desired matrix, and the size of the vectors. */
4344 static struct row_entry
**old_lines
, **new_lines
;
4345 static int old_lines_size
, new_lines_size
;
4347 /* A pool to allocate run structures from, and its size. */
4349 static struct run
*run_pool
;
4350 static int runs_size
;
4352 /* A vector of runs of lines found during scrolling. */
4354 static struct run
**runs
;
4356 /* Add glyph row ROW to the scrolling hash table during the scrolling
4359 static INLINE
struct row_entry
*
4360 add_row_entry (struct window
*w
, struct glyph_row
*row
)
4362 struct row_entry
*entry
;
4363 int i
= row
->hash
% row_table_size
;
4365 entry
= row_table
[i
];
4366 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4367 entry
= entry
->next
;
4371 entry
= row_entry_pool
+ row_entry_idx
++;
4373 entry
->old_uses
= entry
->new_uses
= 0;
4374 entry
->new_line_number
= 0;
4376 entry
->next
= row_table
[i
];
4377 row_table
[i
] = entry
;
4384 /* Try to reuse part of the current display of W by scrolling lines.
4385 HEADER_LINE_P non-zero means W has a header line.
4387 The algorithm is taken from Communications of the ACM, Apr78 "A
4388 Technique for Isolating Differences Between Files." It should take
4391 A short outline of the steps of the algorithm
4393 1. Skip lines equal at the start and end of both matrices.
4395 2. Enter rows in the current and desired matrix into a symbol
4396 table, counting how often they appear in both matrices.
4398 3. Rows that appear exactly once in both matrices serve as anchors,
4399 i.e. we assume that such lines are likely to have been moved.
4401 4. Starting from anchor lines, extend regions to be scrolled both
4402 forward and backward.
4406 -1 if all rows were found to be equal.
4407 0 to indicate that we did not scroll the display, or
4408 1 if we did scroll. */
4411 scrolling_window (struct window
*w
, int header_line_p
)
4413 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4414 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4415 int yb
= window_text_bottom_y (w
);
4416 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4417 int nruns
, nbytes
, n
, run_idx
;
4418 struct row_entry
*entry
;
4419 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4421 /* Skip over rows equal at the start. */
4422 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4424 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4425 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4429 && !d
->redraw_fringe_bitmaps_p
4431 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4432 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4433 && row_equal_p (w
, c
, d
, 1))
4442 /* Give up if some rows in the desired matrix are not enabled. */
4443 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4446 first_old
= first_new
= i
;
4448 /* Set last_new to the index + 1 of the last enabled row in the
4451 while (i
< desired_matrix
->nrows
- 1
4452 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4453 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4456 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4461 /* Set last_old to the index + 1 of the last enabled row in the
4462 current matrix. We don't look at the enabled flag here because
4463 we plan to reuse part of the display even if other parts are
4466 while (i
< current_matrix
->nrows
- 1)
4468 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4477 /* Skip over rows equal at the bottom. */
4480 while (i
- 1 > first_new
4481 && j
- 1 > first_old
4482 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4483 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4484 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4485 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4487 MATRIX_ROW (desired_matrix
, i
- 1),
4488 MATRIX_ROW (current_matrix
, j
- 1), 1))
4493 /* Nothing to do if all rows are equal. */
4494 if (last_new
== first_new
)
4497 /* Reallocate vectors, tables etc. if necessary. */
4499 if (current_matrix
->nrows
> old_lines_size
)
4501 old_lines_size
= current_matrix
->nrows
;
4502 nbytes
= old_lines_size
* sizeof *old_lines
;
4503 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4506 if (desired_matrix
->nrows
> new_lines_size
)
4508 new_lines_size
= desired_matrix
->nrows
;
4509 nbytes
= new_lines_size
* sizeof *new_lines
;
4510 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4513 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4514 if (3 * n
> row_table_size
)
4516 row_table_size
= next_almost_prime (3 * n
);
4517 nbytes
= row_table_size
* sizeof *row_table
;
4518 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4519 memset (row_table
, 0, nbytes
);
4522 if (n
> row_entry_pool_size
)
4524 row_entry_pool_size
= n
;
4525 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4526 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4529 if (desired_matrix
->nrows
> runs_size
)
4531 runs_size
= desired_matrix
->nrows
;
4532 nbytes
= runs_size
* sizeof *runs
;
4533 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4534 nbytes
= runs_size
* sizeof *run_pool
;
4535 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4538 nruns
= run_idx
= 0;
4541 /* Add rows from the current and desired matrix to the hash table
4542 row_hash_table to be able to find equal ones quickly. */
4544 for (i
= first_old
; i
< last_old
; ++i
)
4546 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4548 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4549 old_lines
[i
] = entry
;
4553 old_lines
[i
] = NULL
;
4556 for (i
= first_new
; i
< last_new
; ++i
)
4558 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4559 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4561 entry
->new_line_number
= i
;
4562 new_lines
[i
] = entry
;
4565 /* Identify moves based on lines that are unique and equal
4566 in both matrices. */
4567 for (i
= first_old
; i
< last_old
;)
4569 && old_lines
[i
]->old_uses
== 1
4570 && old_lines
[i
]->new_uses
== 1)
4573 int new_line
= old_lines
[i
]->new_line_number
;
4574 struct run
*run
= run_pool
+ run_idx
++;
4577 run
->current_vpos
= i
;
4578 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4579 run
->desired_vpos
= new_line
;
4580 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4582 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4584 /* Extend backward. */
4587 while (j
> first_old
4589 && old_lines
[j
] == new_lines
[k
])
4591 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4592 --run
->current_vpos
;
4593 --run
->desired_vpos
;
4596 run
->desired_y
-= h
;
4597 run
->current_y
-= h
;
4601 /* Extend forward. */
4606 && old_lines
[j
] == new_lines
[k
])
4608 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4614 /* Insert run into list of all runs. Order runs by copied
4615 pixel lines. Note that we record runs that don't have to
4616 be copied because they are already in place. This is done
4617 because we can avoid calling update_window_line in this
4619 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4621 for (k
= nruns
; k
> j
; --k
)
4622 runs
[k
] = runs
[k
- 1];
4631 /* Do the moves. Do it in a way that we don't overwrite something
4632 we want to copy later on. This is not solvable in general
4633 because there is only one display and we don't have a way to
4634 exchange areas on this display. Example:
4636 +-----------+ +-----------+
4638 +-----------+ --> +-----------+
4640 +-----------+ +-----------+
4642 Instead, prefer bigger moves, and invalidate moves that would
4643 copy from where we copied to. */
4645 for (i
= 0; i
< nruns
; ++i
)
4646 if (runs
[i
]->nrows
> 0)
4648 struct run
*r
= runs
[i
];
4650 /* Copy on the display. */
4651 if (r
->current_y
!= r
->desired_y
)
4653 rif
->scroll_run_hook (w
, r
);
4655 /* Invalidate runs that copy from where we copied to. */
4656 for (j
= i
+ 1; j
< nruns
; ++j
)
4658 struct run
*p
= runs
[j
];
4660 if ((p
->current_y
>= r
->desired_y
4661 && p
->current_y
< r
->desired_y
+ r
->height
)
4662 || (p
->current_y
+ p
->height
>= r
->desired_y
4663 && (p
->current_y
+ p
->height
4664 < r
->desired_y
+ r
->height
)))
4669 /* Assign matrix rows. */
4670 for (j
= 0; j
< r
->nrows
; ++j
)
4672 struct glyph_row
*from
, *to
;
4673 int to_overlapped_p
;
4675 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4676 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4677 to_overlapped_p
= to
->overlapped_p
;
4678 if (!from
->mode_line_p
&& !w
->pseudo_window_p
4679 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
4680 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
4681 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
4682 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
4683 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
4684 from
->redraw_fringe_bitmaps_p
= 1;
4685 assign_row (to
, from
);
4686 to
->enabled_p
= 1, from
->enabled_p
= 0;
4687 to
->overlapped_p
= to_overlapped_p
;
4691 /* Clear the hash table, for the next time. */
4692 for (i
= 0; i
< row_entry_idx
; ++i
)
4693 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4695 /* Value is > 0 to indicate that we scrolled the display. */
4701 /************************************************************************
4703 ************************************************************************/
4705 /* Update the desired frame matrix of frame F.
4707 FORCE_P non-zero means that the update should not be stopped by
4708 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4709 should not be tried.
4711 Value is non-zero if update was stopped due to pending input. */
4714 update_frame_1 (struct frame
*f
, int force_p
, int inhibit_id_p
)
4716 /* Frame matrices to work on. */
4717 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4718 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4721 int preempt_count
= baud_rate
/ 2400 + 1;
4723 xassert (current_matrix
&& desired_matrix
);
4725 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4726 calculate_costs (f
);
4728 if (preempt_count
<= 0)
4731 #if !PERIODIC_PREEMPTION_CHECKING
4732 if (!force_p
&& detect_input_pending_ignore_squeezables ())
4739 /* If we cannot insert/delete lines, it's no use trying it. */
4740 if (!FRAME_LINE_INS_DEL_OK (f
))
4743 /* See if any of the desired lines are enabled; don't compute for
4744 i/d line if just want cursor motion. */
4745 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4746 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4749 /* Try doing i/d line, if not yet inhibited. */
4750 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4751 force_p
|= scrolling (f
);
4753 /* Update the individual lines as needed. Do bottom line first. */
4754 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4755 update_frame_line (f
, desired_matrix
->nrows
- 1);
4757 /* Now update the rest of the lines. */
4758 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4760 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4762 if (FRAME_TERMCAP_P (f
))
4764 /* Flush out every so many lines.
4765 Also flush out if likely to have more than 1k buffered
4766 otherwise. I'm told that some telnet connections get
4767 really screwed by more than 1k output at once. */
4768 FILE *display_output
= FRAME_TTY (f
)->output
;
4771 int outq
= PENDING_OUTPUT_COUNT (display_output
);
4773 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4775 fflush (display_output
);
4776 if (preempt_count
== 1)
4778 #ifdef EMACS_OUTQSIZE
4779 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4780 /* Probably not a tty. Ignore the error and reset
4782 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
4785 if (baud_rate
<= outq
&& baud_rate
> 0)
4786 sleep (outq
/ baud_rate
);
4792 #if PERIODIC_PREEMPTION_CHECKING
4796 EMACS_GET_TIME (tm
);
4797 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4798 if (EMACS_TIME_NEG_P (dif
))
4800 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4801 if (detect_input_pending_ignore_squeezables ())
4806 if (!force_p
&& (i
- 1) % preempt_count
== 0)
4807 detect_input_pending_ignore_squeezables ();
4810 update_frame_line (f
, i
);
4814 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
4816 /* Now just clean up termcap drivers and set cursor, etc. */
4819 if ((cursor_in_echo_area
4820 /* If we are showing a message instead of the mini-buffer,
4821 show the cursor for the message instead of for the
4822 (now hidden) mini-buffer contents. */
4823 || (EQ (minibuf_window
, selected_window
)
4824 && EQ (minibuf_window
, echo_area_window
)
4825 && !NILP (echo_area_buffer
[0])))
4826 /* These cases apply only to the frame that contains
4827 the active mini-buffer window. */
4828 && FRAME_HAS_MINIBUF_P (f
)
4829 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4831 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
4834 if (cursor_in_echo_area
< 0)
4836 /* Negative value of cursor_in_echo_area means put
4837 cursor at beginning of line. */
4843 /* Positive value of cursor_in_echo_area means put
4844 cursor at the end of the prompt. If the mini-buffer
4845 is several lines high, find the last line that has
4847 row
= FRAME_LINES (f
);
4853 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
4855 /* Frame rows are filled up with spaces that
4856 must be ignored here. */
4857 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
4859 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
4860 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
4863 && (last
- 1)->charpos
< 0)
4869 while (row
> top
&& col
== 0);
4871 /* Make sure COL is not out of range. */
4872 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
4874 /* If we have another row, advance cursor into it. */
4875 if (row
< FRAME_LINES (f
) - 1)
4877 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
4880 /* Otherwise move it back in range. */
4882 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
4886 cursor_to (f
, row
, col
);
4890 /* We have only one cursor on terminal frames. Use it to
4891 display the cursor of the selected window. */
4892 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
4893 if (w
->cursor
.vpos
>= 0
4894 /* The cursor vpos may be temporarily out of bounds
4895 in the following situation: There is one window,
4896 with the cursor in the lower half of it. The window
4897 is split, and a message causes a redisplay before
4898 a new cursor position has been computed. */
4899 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
4901 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
4902 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
4904 if (INTEGERP (w
->left_margin_cols
))
4905 x
+= XFASTINT (w
->left_margin_cols
);
4907 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
4908 cursor_to (f
, y
, x
);
4913 #if !PERIODIC_PREEMPTION_CHECKING
4917 clear_desired_matrices (f
);
4922 /* Do line insertions/deletions on frame F for frame-based redisplay. */
4925 scrolling (struct frame
*frame
)
4927 int unchanged_at_top
, unchanged_at_bottom
;
4930 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4931 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4932 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4933 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4935 int free_at_end_vpos
= FRAME_LINES (frame
);
4936 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
4937 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
4939 if (!current_matrix
)
4942 /* Compute hash codes of all the lines. Also calculate number of
4943 changed lines, number of unchanged lines at the beginning, and
4944 number of unchanged lines at the end. */
4946 unchanged_at_top
= 0;
4947 unchanged_at_bottom
= FRAME_LINES (frame
);
4948 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
4950 /* Give up on this scrolling if some old lines are not enabled. */
4951 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
4953 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
4954 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4956 /* This line cannot be redrawn, so don't let scrolling mess it. */
4957 new_hash
[i
] = old_hash
[i
];
4958 #define INFINITY 1000000 /* Taken from scroll.c */
4959 draw_cost
[i
] = INFINITY
;
4963 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
4964 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
4967 if (old_hash
[i
] != new_hash
[i
])
4970 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
4972 else if (i
== unchanged_at_top
)
4974 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
4977 /* If changed lines are few, don't allow preemption, don't scroll. */
4978 if ((!FRAME_SCROLL_REGION_OK (frame
)
4979 && changed_lines
< baud_rate
/ 2400)
4980 || unchanged_at_bottom
== FRAME_LINES (frame
))
4983 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
4984 - unchanged_at_bottom
);
4986 if (FRAME_SCROLL_REGION_OK (frame
))
4987 free_at_end_vpos
-= unchanged_at_bottom
;
4988 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
4989 free_at_end_vpos
= -1;
4991 /* If large window, fast terminal and few lines in common between
4992 current frame and desired frame, don't bother with i/d calc. */
4993 if (!FRAME_SCROLL_REGION_OK (frame
)
4994 && window_size
>= 18 && baud_rate
> 2400
4996 10 * scrolling_max_lines_saved (unchanged_at_top
,
4997 FRAME_LINES (frame
) - unchanged_at_bottom
,
4998 old_hash
, new_hash
, draw_cost
)))
5001 if (window_size
< 2)
5004 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5005 draw_cost
+ unchanged_at_top
- 1,
5006 old_draw_cost
+ unchanged_at_top
- 1,
5007 old_hash
+ unchanged_at_top
- 1,
5008 new_hash
+ unchanged_at_top
- 1,
5009 free_at_end_vpos
- unchanged_at_top
);
5015 /* Count the number of blanks at the start of the vector of glyphs R
5016 which is LEN glyphs long. */
5019 count_blanks (struct glyph
*r
, int len
)
5023 for (i
= 0; i
< len
; ++i
)
5024 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5031 /* Count the number of glyphs in common at the start of the glyph
5032 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5033 of STR2. Value is the number of equal glyphs equal at the start. */
5036 count_match (struct glyph
*str1
, struct glyph
*end1
, struct glyph
*str2
, struct glyph
*end2
)
5038 struct glyph
*p1
= str1
;
5039 struct glyph
*p2
= str2
;
5043 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5050 /* Char insertion/deletion cost vector, from term.c */
5052 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5055 /* Perform a frame-based update on line VPOS in frame FRAME. */
5058 update_frame_line (struct frame
*f
, int vpos
)
5060 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5062 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5063 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5064 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5065 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5066 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5067 int must_write_whole_line_p
;
5068 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5069 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5070 != FACE_TTY_DEFAULT_BG_COLOR
);
5072 if (colored_spaces_p
)
5075 /* Current row not enabled means it has unknown contents. We must
5076 write the whole desired line in that case. */
5077 must_write_whole_line_p
= !current_row
->enabled_p
;
5078 if (must_write_whole_line_p
)
5085 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5086 olen
= current_row
->used
[TEXT_AREA
];
5088 /* Ignore trailing spaces, if we can. */
5089 if (!write_spaces_p
)
5090 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5094 current_row
->enabled_p
= 1;
5095 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5097 /* If desired line is empty, just clear the line. */
5098 if (!desired_row
->enabled_p
)
5104 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5105 nlen
= desired_row
->used
[TEXT_AREA
];
5106 nend
= nbody
+ nlen
;
5108 /* If display line has unknown contents, write the whole line. */
5109 if (must_write_whole_line_p
)
5111 /* Ignore spaces at the end, if we can. */
5112 if (!write_spaces_p
)
5113 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5116 /* Write the contents of the desired line. */
5119 cursor_to (f
, vpos
, 0);
5120 write_glyphs (f
, nbody
, nlen
);
5123 /* Don't call clear_end_of_line if we already wrote the whole
5124 line. The cursor will not be at the right margin in that
5125 case but in the line below. */
5126 if (nlen
< FRAME_TOTAL_COLS (f
))
5128 cursor_to (f
, vpos
, nlen
);
5129 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5132 /* Make sure we are in the right row, otherwise cursor movement
5133 with cmgoto might use `ch' in the wrong row. */
5134 cursor_to (f
, vpos
, 0);
5136 make_current (desired_matrix
, current_matrix
, vpos
);
5140 /* Pretend trailing spaces are not there at all,
5141 unless for one reason or another we must write all spaces. */
5142 if (!write_spaces_p
)
5143 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5146 /* If there's no i/d char, quickly do the best we can without it. */
5147 if (!FRAME_CHAR_INS_DEL_OK (f
))
5151 /* Find the first glyph in desired row that doesn't agree with
5152 a glyph in the current row, and write the rest from there on. */
5153 for (i
= 0; i
< nlen
; i
++)
5155 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5157 /* Find the end of the run of different glyphs. */
5161 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5162 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5165 /* Output this run of non-matching chars. */
5166 cursor_to (f
, vpos
, i
);
5167 write_glyphs (f
, nbody
+ i
, j
- i
);
5170 /* Now find the next non-match. */
5174 /* Clear the rest of the line, or the non-clear part of it. */
5177 cursor_to (f
, vpos
, nlen
);
5178 clear_end_of_line (f
, olen
);
5181 /* Make current row = desired row. */
5182 make_current (desired_matrix
, current_matrix
, vpos
);
5186 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5187 characters in a row. */
5191 /* If current line is blank, skip over initial spaces, if
5192 possible, and write the rest. */
5196 nsp
= count_blanks (nbody
, nlen
);
5200 cursor_to (f
, vpos
, nsp
);
5201 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5204 /* Exchange contents between current_frame and new_frame. */
5205 make_current (desired_matrix
, current_matrix
, vpos
);
5209 /* Compute number of leading blanks in old and new contents. */
5210 osp
= count_blanks (obody
, olen
);
5211 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5213 /* Compute number of matching chars starting with first non-blank. */
5214 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5215 nbody
+ nsp
, nbody
+ nlen
);
5217 /* Spaces in new match implicit space past the end of old. */
5218 /* A bug causing this to be a no-op was fixed in 18.29. */
5219 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5222 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5226 /* Avoid doing insert/delete char
5227 just cause number of leading spaces differs
5228 when the following text does not match. */
5229 if (begmatch
== 0 && osp
!= nsp
)
5230 osp
= nsp
= min (osp
, nsp
);
5232 /* Find matching characters at end of line */
5235 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5237 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5242 endmatch
= obody
+ olen
- op1
;
5244 /* tem gets the distance to insert or delete.
5245 endmatch is how many characters we save by doing so.
5248 tem
= (nlen
- nsp
) - (olen
- osp
);
5250 && (!FRAME_CHAR_INS_DEL_OK (f
)
5251 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5254 /* nsp - osp is the distance to insert or delete.
5255 If that is nonzero, begmatch is known to be nonzero also.
5256 begmatch + endmatch is how much we save by doing the ins/del.
5260 && (!FRAME_CHAR_INS_DEL_OK (f
)
5261 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5265 osp
= nsp
= min (osp
, nsp
);
5268 /* Now go through the line, inserting, writing and
5269 deleting as appropriate. */
5273 cursor_to (f
, vpos
, nsp
);
5274 delete_glyphs (f
, osp
- nsp
);
5278 /* If going to delete chars later in line
5279 and insert earlier in the line,
5280 must delete first to avoid losing data in the insert */
5281 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5283 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5284 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5285 olen
= nlen
- (nsp
- osp
);
5287 cursor_to (f
, vpos
, osp
);
5288 insert_glyphs (f
, 0, nsp
- osp
);
5292 tem
= nsp
+ begmatch
+ endmatch
;
5293 if (nlen
!= tem
|| olen
!= tem
)
5295 if (!endmatch
|| nlen
== olen
)
5297 /* If new text being written reaches right margin, there is
5298 no need to do clear-to-eol at the end of this function
5299 (and it would not be safe, since cursor is not going to
5300 be "at the margin" after the text is done). */
5301 if (nlen
== FRAME_TOTAL_COLS (f
))
5304 /* Function write_glyphs is prepared to do nothing
5305 if passed a length <= 0. Check it here to avoid
5306 unnecessary cursor movement. */
5309 cursor_to (f
, vpos
, nsp
+ begmatch
);
5310 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5313 else if (nlen
> olen
)
5315 /* Here, we used to have the following simple code:
5316 ----------------------------------------
5317 write_glyphs (nbody + nsp + begmatch, olen - tem);
5318 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5319 ----------------------------------------
5320 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5321 is a padding glyph. */
5322 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5325 cursor_to (f
, vpos
, nsp
+ begmatch
);
5327 /* Calculate columns we can actually overwrite. */
5328 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5330 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5332 /* If we left columns to be overwritten, we must delete them. */
5333 del
= olen
- tem
- out
;
5335 delete_glyphs (f
, del
);
5337 /* At last, we insert columns not yet written out. */
5338 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5341 else if (olen
> nlen
)
5343 cursor_to (f
, vpos
, nsp
+ begmatch
);
5344 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5345 delete_glyphs (f
, olen
- nlen
);
5351 /* If any unerased characters remain after the new line, erase them. */
5354 cursor_to (f
, vpos
, nlen
);
5355 clear_end_of_line (f
, olen
);
5358 /* Exchange contents between current_frame and new_frame. */
5359 make_current (desired_matrix
, current_matrix
, vpos
);
5364 /***********************************************************************
5365 X/Y Position -> Buffer Position
5366 ***********************************************************************/
5368 /* Determine what's under window-relative pixel position (*X, *Y).
5369 Return the OBJECT (string or buffer) that's there.
5370 Return in *POS the position in that object.
5371 Adjust *X and *Y to character positions.
5372 Return in *DX and *DY the pixel coordinates of the click,
5373 relative to the top left corner of OBJECT, or relative to
5374 the top left corner of the character glyph at (*X, *Y)
5376 Return WIDTH and HEIGHT of the object at (*X, *Y), or zero
5377 if the coordinates point to an empty area of the display. */
5380 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
)
5383 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5384 struct text_pos startp
;
5386 struct glyph_row
*row
;
5387 #ifdef HAVE_WINDOW_SYSTEM
5388 struct image
*img
= 0;
5392 /* We used to set current_buffer directly here, but that does the
5393 wrong thing with `face-remapping-alist' (bug#2044). */
5394 Fset_buffer (w
->buffer
);
5395 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5396 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5397 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5398 start_display (&it
, w
, startp
);
5402 /* First, move to the beginning of the row corresponding to *Y. We
5403 need to be in that row to get the correct value of base paragraph
5404 direction for the text at (*X, *Y). */
5405 move_it_to (&it
, -1, 0, *y
, -1, MOVE_TO_X
| MOVE_TO_Y
);
5407 /* TO_X is the pixel position that the iterator will compute for the
5408 glyph at *X. We add it.first_visible_x because iterator
5409 positions include the hscroll. */
5410 to_x
= x0
+ it
.first_visible_x
;
5411 if (it
.bidi_it
.paragraph_dir
== R2L
)
5412 /* For lines in an R2L paragraph, we need to mirror TO_X wrt the
5413 text area. This is because the iterator, even in R2L
5414 paragraphs, delivers glyphs as if they started at the left
5415 margin of the window. (When we actually produce glyphs for
5416 display, we reverse their order in PRODUCE_GLYPHS, but the
5417 iterator doesn't know about that.) The following line adjusts
5418 the pixel position to the iterator geometry, which is what
5419 move_it_* routines use. (The -1 is because in a window whose
5420 text-area width is W, the rightmost pixel position is W-1, and
5421 it should be mirrored into zero pixel position.) */
5422 to_x
= window_box_width (w
, TEXT_AREA
) - to_x
- 1;
5424 /* Now move horizontally in the row to the glyph under *X. Second
5425 argument is ZV to prevent move_it_in_display_line from matching
5426 based on buffer positions. */
5427 move_it_in_display_line (&it
, ZV
, to_x
, MOVE_TO_X
);
5429 Fset_buffer (old_current_buffer
);
5431 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5432 *dy
= *y
- it
.current_y
;
5435 if (STRINGP (it
.string
))
5438 if (it
.what
== IT_COMPOSITION
5439 && it
.cmp_it
.nchars
> 1
5440 && it
.cmp_it
.reversed_p
)
5442 /* The current display element is a grapheme cluster in a
5443 composition. In that case, we need the position of the first
5444 character of the cluster. But, as it.cmp_it.reversed_p is 1,
5445 it.current points to the last character of the cluster, thus
5446 we must move back to the first character of the same
5448 CHARPOS (pos
->pos
) -= it
.cmp_it
.nchars
- 1;
5449 if (STRINGP (it
.string
))
5450 BYTEPOS (pos
->pos
) = string_char_to_byte (string
, CHARPOS (pos
->pos
));
5452 BYTEPOS (pos
->pos
) = CHAR_TO_BYTE (CHARPOS (pos
->pos
));
5455 #ifdef HAVE_WINDOW_SYSTEM
5456 if (it
.what
== IT_IMAGE
)
5458 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5459 && !NILP (img
->spec
))
5460 *object
= img
->spec
;
5464 if (it
.vpos
< w
->current_matrix
->nrows
5465 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5468 if (it
.hpos
< row
->used
[TEXT_AREA
])
5470 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5471 #ifdef HAVE_WINDOW_SYSTEM
5474 *dy
-= row
->ascent
- glyph
->ascent
;
5475 *dx
+= glyph
->slice
.img
.x
;
5476 *dy
+= glyph
->slice
.img
.y
;
5477 /* Image slices positions are still relative to the entire image */
5478 *width
= img
->width
;
5479 *height
= img
->height
;
5484 *width
= glyph
->pixel_width
;
5485 *height
= glyph
->ascent
+ glyph
->descent
;
5491 *height
= row
->height
;
5496 *width
= *height
= 0;
5499 /* Add extra (default width) columns if clicked after EOL. */
5500 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5502 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5511 /* Value is the string under window-relative coordinates X/Y in the
5512 mode line or header line (PART says which) of window W, or nil if none.
5513 *CHARPOS is set to the position in the string returned. */
5516 mode_line_string (struct window
*w
, enum window_part part
,
5517 int *x
, int *y
, EMACS_INT
*charpos
, Lisp_Object
*object
,
5518 int *dx
, int *dy
, int *width
, int *height
)
5520 struct glyph_row
*row
;
5521 struct glyph
*glyph
, *end
;
5523 Lisp_Object string
= Qnil
;
5525 if (part
== ON_MODE_LINE
)
5526 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5528 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5530 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5532 if (row
->mode_line_p
&& row
->enabled_p
)
5534 /* Find the glyph under X. If we find one with a string object,
5535 it's the one we were looking for. */
5536 glyph
= row
->glyphs
[TEXT_AREA
];
5537 end
= glyph
+ row
->used
[TEXT_AREA
];
5538 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5539 x0
-= glyph
->pixel_width
;
5540 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5543 string
= glyph
->object
;
5544 *charpos
= glyph
->charpos
;
5545 *width
= glyph
->pixel_width
;
5546 *height
= glyph
->ascent
+ glyph
->descent
;
5547 #ifdef HAVE_WINDOW_SYSTEM
5548 if (glyph
->type
== IMAGE_GLYPH
)
5551 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5553 *object
= img
->spec
;
5554 y0
-= row
->ascent
- glyph
->ascent
;
5560 /* Add extra (default width) columns if clicked after EOL. */
5561 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5563 *height
= row
->height
;
5570 *width
= *height
= 0;
5580 /* Value is the string under window-relative coordinates X/Y in either
5581 marginal area, or nil if none. *CHARPOS is set to the position in
5582 the string returned. */
5585 marginal_area_string (struct window
*w
, enum window_part part
,
5586 int *x
, int *y
, EMACS_INT
*charpos
, Lisp_Object
*object
,
5587 int *dx
, int *dy
, int *width
, int *height
)
5589 struct glyph_row
*row
= w
->current_matrix
->rows
;
5590 struct glyph
*glyph
, *end
;
5591 int x0
, y0
, i
, wy
= *y
;
5593 Lisp_Object string
= Qnil
;
5595 if (part
== ON_LEFT_MARGIN
)
5596 area
= LEFT_MARGIN_AREA
;
5597 else if (part
== ON_RIGHT_MARGIN
)
5598 area
= RIGHT_MARGIN_AREA
;
5602 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5603 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5606 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5610 /* Find the glyph under X. If we find one with a string object,
5611 it's the one we were looking for. */
5612 if (area
== RIGHT_MARGIN_AREA
)
5613 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5614 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5615 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5616 + window_box_width (w
, LEFT_MARGIN_AREA
)
5617 + window_box_width (w
, TEXT_AREA
));
5619 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5620 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5623 glyph
= row
->glyphs
[area
];
5624 end
= glyph
+ row
->used
[area
];
5625 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5626 x0
-= glyph
->pixel_width
;
5627 *x
= glyph
- row
->glyphs
[area
];
5630 string
= glyph
->object
;
5631 *charpos
= glyph
->charpos
;
5632 *width
= glyph
->pixel_width
;
5633 *height
= glyph
->ascent
+ glyph
->descent
;
5634 #ifdef HAVE_WINDOW_SYSTEM
5635 if (glyph
->type
== IMAGE_GLYPH
)
5638 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5640 *object
= img
->spec
;
5641 y0
-= row
->ascent
- glyph
->ascent
;
5642 x0
+= glyph
->slice
.img
.x
;
5643 y0
+= glyph
->slice
.img
.y
;
5649 /* Add extra (default width) columns if clicked after EOL. */
5650 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5652 *height
= row
->height
;
5659 *width
= *height
= 0;
5669 /***********************************************************************
5670 Changing Frame Sizes
5671 ***********************************************************************/
5676 window_change_signal (int signalnum
) /* If we don't have an argument, */
5677 /* some compilers complain in signal calls. */
5680 int old_errno
= errno
;
5682 struct tty_display_info
*tty
;
5684 signal (SIGWINCH
, window_change_signal
);
5685 SIGNAL_THREAD_CHECK (signalnum
);
5687 /* The frame size change obviously applies to a single
5688 termcap-controlled terminal, but we can't decide which.
5689 Therefore, we resize the frames corresponding to each tty.
5691 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
5693 if (! tty
->term_initted
)
5696 /* Suspended tty frames have tty->input == NULL avoid trying to
5701 get_tty_size (fileno (tty
->input
), &width
, &height
);
5703 if (width
> 5 && height
> 2) {
5704 Lisp_Object tail
, frame
;
5706 FOR_EACH_FRAME (tail
, frame
)
5707 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
5708 /* Record the new sizes, but don't reallocate the data
5709 structures now. Let that be done later outside of the
5711 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5717 #endif /* SIGWINCH */
5720 /* Do any change in frame size that was requested by a signal. SAFE
5721 non-zero means this function is called from a place where it is
5722 safe to change frame sizes while a redisplay is in progress. */
5725 do_pending_window_change (int safe
)
5727 /* If window_change_signal should have run before, run it now. */
5728 if (redisplaying_p
&& !safe
)
5731 while (delayed_size_change
)
5733 Lisp_Object tail
, frame
;
5735 delayed_size_change
= 0;
5737 FOR_EACH_FRAME (tail
, frame
)
5739 struct frame
*f
= XFRAME (frame
);
5741 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
5742 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
5749 /* Change the frame height and/or width. Values may be given as zero to
5750 indicate no change is to take place.
5752 If DELAY is non-zero, then assume we're being called from a signal
5753 handler, and queue the change for later - perhaps the next
5754 redisplay. Since this tries to resize windows, we can't call it
5755 from a signal handler.
5757 SAFE non-zero means this function is called from a place where it's
5758 safe to change frame sizes while a redisplay is in progress. */
5761 change_frame_size (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5763 Lisp_Object tail
, frame
;
5765 if (FRAME_MSDOS_P (f
))
5767 /* On MS-DOS, all frames use the same screen, so a change in
5768 size affects all frames. Termcap now supports multiple
5770 FOR_EACH_FRAME (tail
, frame
)
5771 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5772 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5773 pretend
, delay
, safe
);
5776 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5780 change_frame_size_1 (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5782 int new_frame_total_cols
;
5783 int count
= SPECPDL_INDEX ();
5785 /* If we can't deal with the change now, queue it for later. */
5786 if (delay
|| (redisplaying_p
&& !safe
))
5788 f
->new_text_lines
= newheight
;
5789 f
->new_text_cols
= newwidth
;
5790 delayed_size_change
= 1;
5794 /* This size-change overrides any pending one for this frame. */
5795 f
->new_text_lines
= 0;
5796 f
->new_text_cols
= 0;
5798 /* If an argument is zero, set it to the current value. */
5800 newheight
= FRAME_LINES (f
);
5802 newwidth
= FRAME_COLS (f
);
5804 /* Compute width of windows in F.
5805 This is the width of the frame without vertical scroll bars. */
5806 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
5808 /* Round up to the smallest acceptable size. */
5809 check_frame_size (f
, &newheight
, &newwidth
);
5811 /* If we're not changing the frame size, quit now. */
5812 /* Frame width may be unchanged but the text portion may change, for example,
5813 fullscreen and remove/add scroll bar. */
5814 if (newheight
== FRAME_LINES (f
)
5815 && newwidth
== FRAME_COLS (f
) // text portion unchanged
5816 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
)) // frame width unchanged
5822 /* We only can set screen dimensions to certain values supported
5823 by our video hardware. Try to find the smallest size greater
5824 or equal to the requested dimensions. */
5825 dos_set_window_size (&newheight
, &newwidth
);
5828 if (newheight
!= FRAME_LINES (f
))
5830 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5832 /* Frame has both root and mini-buffer. */
5833 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
5834 FRAME_TOP_MARGIN (f
));
5835 set_window_height (FRAME_ROOT_WINDOW (f
),
5838 - FRAME_TOP_MARGIN (f
)),
5840 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
5842 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5845 /* Frame has just one top-level window. */
5846 set_window_height (FRAME_ROOT_WINDOW (f
),
5847 newheight
- FRAME_TOP_MARGIN (f
), 2);
5849 /* MSDOS frames cannot PRETEND, as they change frame size by
5850 manipulating video hardware. */
5851 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5852 FrameRows (FRAME_TTY (f
)) = newheight
;
5855 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
5857 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
5858 if (FRAME_HAS_MINIBUF_P (f
))
5859 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
5861 /* MSDOS frames cannot PRETEND, as they change frame size by
5862 manipulating video hardware. */
5863 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5864 FrameCols (FRAME_TTY (f
)) = newwidth
;
5866 if (WINDOWP (f
->tool_bar_window
))
5867 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
5870 FRAME_LINES (f
) = newheight
;
5871 SET_FRAME_COLS (f
, newwidth
);
5874 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5875 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5877 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5879 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5880 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5881 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5882 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5886 calculate_costs (f
);
5887 SET_FRAME_GARBAGED (f
);
5892 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5894 run_window_configuration_change_hook (f
);
5896 unbind_to (count
, Qnil
);
5901 /***********************************************************************
5902 Terminal Related Lisp Functions
5903 ***********************************************************************/
5905 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5906 1, 1, "FOpen termscript file: ",
5907 doc
: /* Start writing all terminal output to FILE as well as the terminal.
5908 FILE = nil means just close any termscript file currently open. */)
5911 struct tty_display_info
*tty
;
5913 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
5914 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
5915 error ("Current frame is not on a tty device");
5919 if (tty
->termscript
!= 0)
5922 fclose (tty
->termscript
);
5925 tty
->termscript
= 0;
5929 file
= Fexpand_file_name (file
, Qnil
);
5930 tty
->termscript
= fopen (SDATA (file
), "w");
5931 if (tty
->termscript
== 0)
5932 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5938 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5939 Ssend_string_to_terminal
, 1, 2, 0,
5940 doc
: /* Send STRING to the terminal without alteration.
5941 Control characters in STRING will have terminal-dependent effects.
5943 Optional parameter TERMINAL specifies the tty terminal device to use.
5944 It may be a terminal object, a frame, or nil for the terminal used by
5945 the currently selected frame. In batch mode, STRING is sent to stdout
5946 when TERMINAL is nil. */)
5947 (Lisp_Object string
, Lisp_Object terminal
)
5949 struct terminal
*t
= get_terminal (terminal
, 1);
5952 /* ??? Perhaps we should do something special for multibyte strings here. */
5953 CHECK_STRING (string
);
5957 error ("Unknown terminal device");
5959 if (t
->type
== output_initial
)
5961 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
5962 error ("Device %d is not a termcap terminal device", t
->id
);
5965 struct tty_display_info
*tty
= t
->display_info
.tty
;
5968 error ("Terminal is currently suspended");
5970 if (tty
->termscript
)
5972 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
5973 fflush (tty
->termscript
);
5977 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
5984 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5985 doc
: /* Beep, or flash the screen.
5986 Also, unless an argument is given,
5987 terminate any keyboard macro currently executing. */)
5995 ring_bell (XFRAME (selected_frame
));
6004 bitch_at_user (void)
6008 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6009 error ("Keyboard macro terminated by a command ringing the bell");
6011 ring_bell (XFRAME (selected_frame
));
6016 /***********************************************************************
6018 ***********************************************************************/
6020 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6021 doc
: /* Pause, without updating display, for SECONDS seconds.
6022 SECONDS may be a floating-point value, meaning that you can wait for a
6023 fraction of a second. Optional second arg MILLISECONDS specifies an
6024 additional wait period, in milliseconds; this may be useful if your
6025 Emacs was built without floating point support.
6026 \(Not all operating systems support waiting for a fraction of a second.) */)
6027 (Lisp_Object seconds
, Lisp_Object milliseconds
)
6031 if (NILP (milliseconds
))
6032 XSETINT (milliseconds
, 0);
6034 CHECK_NUMBER (milliseconds
);
6035 usec
= XINT (milliseconds
) * 1000;
6038 double duration
= extract_float (seconds
);
6039 sec
= (int) duration
;
6040 usec
+= (duration
- sec
) * 1000000;
6043 #ifndef EMACS_HAS_USECS
6044 if (sec
== 0 && usec
!= 0)
6045 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6048 /* Assure that 0 <= usec < 1000000. */
6051 /* We can't rely on the rounding being correct if usec is negative. */
6052 if (-1000000 < usec
)
6053 sec
--, usec
+= 1000000;
6055 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6058 sec
+= usec
/ 1000000, usec
%= 1000000;
6060 if (sec
< 0 || (sec
== 0 && usec
== 0))
6063 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6069 /* This is just like wait_reading_process_output, except that
6072 TIMEOUT is number of seconds to wait (float or integer),
6073 or t to wait forever.
6074 READING is 1 if reading input.
6075 If DO_DISPLAY is >0 display process output while waiting.
6076 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6080 sit_for (Lisp_Object timeout
, int reading
, int do_display
)
6084 swallow_events (do_display
);
6086 if ((detect_input_pending_run_timers (do_display
))
6087 || !NILP (Vexecuting_kbd_macro
))
6090 if (do_display
>= 2)
6091 redisplay_preserve_echo_area (2);
6093 if (INTEGERP (timeout
))
6095 sec
= XINT (timeout
);
6098 else if (FLOATP (timeout
))
6100 double seconds
= XFLOAT_DATA (timeout
);
6101 sec
= (int) seconds
;
6102 usec
= (int) ((seconds
- sec
) * 1000000);
6104 else if (EQ (timeout
, Qt
))
6110 wrong_type_argument (Qnumberp
, timeout
);
6112 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6119 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6122 return detect_input_pending () ? Qnil
: Qt
;
6126 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6127 doc
: /* Perform redisplay if no input is available.
6128 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6129 perform a full redisplay even if input is available.
6130 Return t if redisplay was performed, nil otherwise. */)
6136 if ((detect_input_pending_run_timers (1)
6137 && NILP (force
) && !redisplay_dont_pause
)
6138 || !NILP (Vexecuting_kbd_macro
))
6141 count
= SPECPDL_INDEX ();
6142 if (!NILP (force
) && !redisplay_dont_pause
)
6143 specbind (Qredisplay_dont_pause
, Qt
);
6144 redisplay_preserve_echo_area (2);
6145 unbind_to (count
, Qnil
);
6151 /***********************************************************************
6152 Other Lisp Functions
6153 ***********************************************************************/
6155 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6156 session's frames, frame names, buffers, buffer-read-only flags, and
6157 buffer-modified-flags. */
6159 static Lisp_Object frame_and_buffer_state
;
6162 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6163 Sframe_or_buffer_changed_p
, 0, 1, 0,
6164 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6165 VARIABLE is a variable name whose value is either nil or a state vector
6166 that will be updated to contain all frames and buffers,
6167 aside from buffers whose names start with space,
6168 along with the buffers' read-only and modified flags. This allows a fast
6169 check to see whether buffer menus might need to be recomputed.
6170 If this function returns non-nil, it updates the internal vector to reflect
6173 If VARIABLE is nil, an internal variable is used. Users should not
6174 pass nil for VARIABLE. */)
6175 (Lisp_Object variable
)
6177 Lisp_Object state
, tail
, frame
, buf
;
6178 Lisp_Object
*vecp
, *end
;
6181 if (! NILP (variable
))
6183 CHECK_SYMBOL (variable
);
6184 state
= Fsymbol_value (variable
);
6185 if (! VECTORP (state
))
6189 state
= frame_and_buffer_state
;
6191 vecp
= XVECTOR (state
)->contents
;
6192 end
= vecp
+ XVECTOR (state
)->size
;
6194 FOR_EACH_FRAME (tail
, frame
)
6198 if (!EQ (*vecp
++, frame
))
6202 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6205 /* Check that the buffer info matches. */
6206 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6208 buf
= XCDR (XCAR (tail
));
6209 /* Ignore buffers that aren't included in buffer lists. */
6210 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6214 if (!EQ (*vecp
++, buf
))
6218 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6222 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6227 /* Detect deletion of a buffer at the end of the list. */
6228 if (EQ (*vecp
, Qlambda
))
6231 /* Come here if we decide the data has changed. */
6233 /* Count the size we will need.
6234 Start with 1 so there is room for at least one lambda at the end. */
6236 FOR_EACH_FRAME (tail
, frame
)
6238 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6240 /* Reallocate the vector if data has grown to need it,
6241 or if it has shrunk a lot. */
6242 if (! VECTORP (state
)
6243 || n
> XVECTOR (state
)->size
6244 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6245 /* Add 20 extra so we grow it less often. */
6247 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6248 if (! NILP (variable
))
6249 Fset (variable
, state
);
6251 frame_and_buffer_state
= state
;
6254 /* Record the new data in the (possibly reallocated) vector. */
6255 vecp
= XVECTOR (state
)->contents
;
6256 FOR_EACH_FRAME (tail
, frame
)
6259 *vecp
++ = XFRAME (frame
)->name
;
6261 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6263 buf
= XCDR (XCAR (tail
));
6264 /* Ignore buffers that aren't included in buffer lists. */
6265 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6268 *vecp
++ = XBUFFER (buf
)->read_only
;
6269 *vecp
++ = Fbuffer_modified_p (buf
);
6271 /* Fill up the vector with lambdas (always at least one). */
6273 while (vecp
- XVECTOR (state
)->contents
6274 < XVECTOR (state
)->size
)
6276 /* Make sure we didn't overflow the vector. */
6277 if (vecp
- XVECTOR (state
)->contents
6278 > XVECTOR (state
)->size
)
6285 /***********************************************************************
6287 ***********************************************************************/
6289 /* Initialization done when Emacs fork is started, before doing stty.
6290 Determine terminal type and set terminal_driver. Then invoke its
6291 decoding routine to set up variables in the terminal package. */
6296 char *terminal_type
;
6298 /* Construct the space glyph. */
6299 space_glyph
.type
= CHAR_GLYPH
;
6300 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6301 space_glyph
.charpos
= -1;
6304 cursor_in_echo_area
= 0;
6305 terminal_type
= (char *) 0;
6307 /* Now is the time to initialize this; it's used by init_sys_modes
6309 Vinitial_window_system
= Qnil
;
6311 /* SIGWINCH needs to be handled no matter what display we start
6312 with. Otherwise newly opened tty frames will not resize
6317 #endif /* CANNOT_DUMP */
6318 signal (SIGWINCH
, window_change_signal
);
6319 #endif /* SIGWINCH */
6321 /* If running as a daemon, no need to initialize any frames/terminal. */
6325 /* If the user wants to use a window system, we shouldn't bother
6326 initializing the terminal. This is especially important when the
6327 terminal is so dumb that emacs gives up before and doesn't bother
6328 using the window system.
6330 If the DISPLAY environment variable is set and nonempty,
6331 try to use X, and die with an error message if that doesn't work. */
6333 #ifdef HAVE_X_WINDOWS
6334 if (! inhibit_window_system
&& ! display_arg
)
6337 display
= getenv ("DISPLAY");
6338 display_arg
= (display
!= 0 && *display
!= 0);
6340 if (display_arg
&& !x_display_ok (display
))
6342 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6344 inhibit_window_system
= 1;
6348 if (!inhibit_window_system
&& display_arg
6354 Vinitial_window_system
= Qx
;
6356 Vwindow_system_version
= make_number (11);
6358 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6359 /* In some versions of ncurses,
6360 tputs crashes if we have not called tgetent.
6362 { char b
[2044]; tgetent (b
, "xterm");}
6364 adjust_frame_glyphs_initially ();
6367 #endif /* HAVE_X_WINDOWS */
6370 if (!inhibit_window_system
)
6372 Vinitial_window_system
= Qw32
;
6373 Vwindow_system_version
= make_number (1);
6374 adjust_frame_glyphs_initially ();
6377 #endif /* HAVE_NTGUI */
6380 if (!inhibit_window_system
6386 Vinitial_window_system
= Qns
;
6387 Vwindow_system_version
= make_number(10);
6388 adjust_frame_glyphs_initially ();
6393 /* If no window system has been specified, try to use the terminal. */
6396 fatal ("standard input is not a tty");
6401 terminal_type
= "w32console";
6403 /* Look at the TERM variable. */
6404 terminal_type
= (char *) getenv ("TERM");
6408 #ifdef HAVE_WINDOW_SYSTEM
6409 if (! inhibit_window_system
)
6410 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6412 #endif /* HAVE_WINDOW_SYSTEM */
6413 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6419 struct frame
*f
= XFRAME (selected_frame
);
6421 /* Open a display on the controlling tty. */
6422 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6424 /* Convert the initial frame to use the new display. */
6425 if (f
->output_method
!= output_initial
)
6427 f
->output_method
= t
->type
;
6430 t
->reference_count
++;
6432 f
->output_data
.tty
->display_info
= &the_only_display_info
;
6434 if (f
->output_method
== output_termcap
)
6435 create_tty_output (f
);
6437 t
->display_info
.tty
->top_frame
= selected_frame
;
6438 change_frame_size (XFRAME (selected_frame
),
6439 FrameRows (t
->display_info
.tty
),
6440 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6442 /* Delete the initial terminal. */
6443 if (--initial_terminal
->reference_count
== 0
6444 && initial_terminal
->delete_terminal_hook
)
6445 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6447 /* Update frame parameters to reflect the new type. */
6448 Fmodify_frame_parameters
6449 (selected_frame
, Fcons (Fcons (Qtty_type
,
6450 Ftty_type (selected_frame
)), Qnil
));
6451 if (t
->display_info
.tty
->name
)
6452 Fmodify_frame_parameters (selected_frame
,
6453 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6456 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
6461 struct frame
*sf
= SELECTED_FRAME ();
6462 int width
= FRAME_TOTAL_COLS (sf
);
6463 int height
= FRAME_LINES (sf
);
6465 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6467 /* If these sizes are so big they cause overflow, just ignore the
6468 change. It's not clear what better we could do. */
6469 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6470 fatal ("screen size %dx%d too big", width
, height
);
6473 adjust_frame_glyphs_initially ();
6474 calculate_costs (XFRAME (selected_frame
));
6476 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6479 && NILP (Vinitial_window_system
))
6481 /* For the initial frame, we don't have any way of knowing what
6482 are the foreground and background colors of the terminal. */
6483 struct frame
*sf
= SELECTED_FRAME();
6485 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6486 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6487 call0 (intern ("tty-set-up-initial-frame-faces"));
6493 /***********************************************************************
6495 ***********************************************************************/
6497 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6498 Sinternal_show_cursor
, 2, 2, 0,
6499 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6500 WINDOW nil means use the selected window. SHOW non-nil means
6501 show a cursor in WINDOW in the next redisplay. SHOW nil means
6502 don't show a cursor. */)
6503 (Lisp_Object window
, Lisp_Object show
)
6505 /* Don't change cursor state while redisplaying. This could confuse
6507 if (!redisplaying_p
)
6510 window
= selected_window
;
6512 CHECK_WINDOW (window
);
6514 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6521 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6522 Sinternal_show_cursor_p
, 0, 1, 0,
6523 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6524 WINDOW nil or omitted means report on the selected window. */)
6525 (Lisp_Object window
)
6530 window
= selected_window
;
6532 CHECK_WINDOW (window
);
6534 w
= XWINDOW (window
);
6535 return w
->cursor_off_p
? Qnil
: Qt
;
6538 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
6539 Slast_nonminibuf_frame
, 0, 0, 0,
6540 doc
: /* Value is last nonminibuffer frame. */)
6543 Lisp_Object frame
= Qnil
;
6545 if (last_nonminibuf_frame
)
6546 XSETFRAME (frame
, last_nonminibuf_frame
);
6551 /***********************************************************************
6553 ***********************************************************************/
6556 syms_of_display (void)
6558 defsubr (&Sredraw_frame
);
6559 defsubr (&Sredraw_display
);
6560 defsubr (&Sframe_or_buffer_changed_p
);
6561 defsubr (&Sopen_termscript
);
6563 defsubr (&Sredisplay
);
6564 defsubr (&Ssleep_for
);
6565 defsubr (&Ssend_string_to_terminal
);
6566 defsubr (&Sinternal_show_cursor
);
6567 defsubr (&Sinternal_show_cursor_p
);
6568 defsubr (&Slast_nonminibuf_frame
);
6571 defsubr (&Sdump_redisplay_history
);
6574 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6575 staticpro (&frame_and_buffer_state
);
6577 Qdisplay_table
= intern_c_string ("display-table");
6578 staticpro (&Qdisplay_table
);
6579 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
6580 staticpro (&Qredisplay_dont_pause
);
6582 DEFVAR_INT ("baud-rate", &baud_rate
,
6583 doc
: /* *The output baud rate of the terminal.
6584 On most systems, changing this value will affect the amount of padding
6585 and the other strategic decisions made during redisplay. */);
6587 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6588 doc
: /* *Non-nil means invert the entire frame display.
6589 This means everything is in inverse video which otherwise would not be. */);
6591 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6592 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6594 See also `ring-bell-function'. */);
6596 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6597 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6598 A non-nil value is useful if the terminal can automatically preserve
6599 Emacs's frame display when you reenter Emacs.
6600 It is up to you to set this variable if your terminal can do that. */);
6602 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6603 doc
: /* Name of the window system that Emacs uses for the first frame.
6604 The value is a symbol:
6605 nil for a termcap frame (a character-only terminal),
6606 'x' for an Emacs frame that is really an X window,
6607 'w32' for an Emacs frame that is a window on MS-Windows display,
6608 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display,
6609 'pc' for a direct-write MS-DOS frame.
6611 Use of this variable as a boolean is deprecated. Instead,
6612 use `display-graphic-p' or any of the other `display-*-p'
6613 predicates which report frame's specific UI-related capabilities. */);
6615 DEFVAR_KBOARD ("window-system", Vwindow_system
,
6616 doc
: /* Name of window system through which the selected frame is displayed.
6617 The value is a symbol:
6618 nil for a termcap frame (a character-only terminal),
6619 'x' for an Emacs frame that is really an X window,
6620 'w32' for an Emacs frame that is a window on MS-Windows display,
6621 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display,
6622 'pc' for a direct-write MS-DOS frame.
6624 Use of this variable as a boolean is deprecated. Instead,
6625 use `display-graphic-p' or any of the other `display-*-p'
6626 predicates which report frame's specific UI-related capabilities. */);
6628 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6629 doc
: /* The version number of the window system in use.
6630 For X windows, this is 11. */);
6632 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6633 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6635 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6636 doc
: /* Table defining how to output a glyph code to the frame.
6637 If not nil, this is a vector indexed by glyph code to define the glyph.
6638 Each element can be:
6639 integer: a glyph code which this glyph is an alias for.
6640 string: output this glyph using that string (not impl. in X windows).
6641 nil: this glyph mod 524288 is the code of a character to output,
6642 and this glyph / 524288 is the face number (see `face-id') to use
6643 while outputting it. */);
6644 Vglyph_table
= Qnil
;
6646 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6647 doc
: /* Display table to use for buffers that specify none.
6648 See `buffer-display-table' for more information. */);
6649 Vstandard_display_table
= Qnil
;
6651 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6652 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6653 redisplay_dont_pause
= 0;
6655 #if PERIODIC_PREEMPTION_CHECKING
6656 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
6657 doc
: /* *The period in seconds between checking for input during redisplay.
6658 If input is detected, redisplay is pre-empted, and the input is processed.
6659 If nil, never pre-empt redisplay. */);
6660 Vredisplay_preemption_period
= make_float (0.10);
6667 Vinitial_window_system
= Qnil
;
6668 Vwindow_system_version
= Qnil
;
6672 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6673 (do not change this comment) */