1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985-1988, 1993-1995, 1997-2011 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
29 /* cm.h must come after dispextern.h on Windows. */
30 #include "dispextern.h"
33 #include "character.h"
36 #include "termhooks.h"
41 #include "intervals.h"
42 #include "blockinput.h"
45 #include "syssignal.h"
49 #endif /* HAVE_X_WINDOWS */
53 #endif /* HAVE_NTGUI */
59 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
64 /* Get number of chars of output now in the buffer of a stdio stream.
65 This ought to be built in in stdio, but it isn't. Some s- files
66 override this because their stdio internals differ. */
68 #ifdef __GNU_LIBRARY__
70 /* The s- file might have overridden the definition with one that
71 works for the system's C library. But we are using the GNU C
72 library, so this is the right definition for every system. */
74 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
75 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
77 #undef PENDING_OUTPUT_COUNT
78 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
80 #else /* not __GNU_LIBRARY__ */
81 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
82 #include <stdio_ext.h>
83 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
85 #ifndef PENDING_OUTPUT_COUNT
86 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
88 #endif /* not __GNU_LIBRARY__ */
90 #if defined (HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
91 #include <term.h> /* for tgetent */
94 /* Structure to pass dimensions around. Used for character bounding
95 boxes, glyph matrix dimensions and alike. */
104 /* Function prototypes. */
106 static void update_frame_line (struct frame
*, int);
107 static int required_matrix_height (struct window
*);
108 static int required_matrix_width (struct window
*);
109 static void adjust_frame_glyphs (struct frame
*);
110 static void change_frame_size_1 (struct frame
*, int, int, int, int, int);
111 static void increment_row_positions (struct glyph_row
*, ptrdiff_t, ptrdiff_t);
112 static void fill_up_frame_row_with_spaces (struct glyph_row
*, int);
113 static void build_frame_matrix_from_window_tree (struct glyph_matrix
*,
115 static void build_frame_matrix_from_leaf_window (struct glyph_matrix
*,
117 static void adjust_frame_message_buffer (struct frame
*);
118 static void adjust_decode_mode_spec_buffer (struct frame
*);
119 static void fill_up_glyph_row_with_spaces (struct glyph_row
*);
120 static void clear_window_matrices (struct window
*, int);
121 static void fill_up_glyph_row_area_with_spaces (struct glyph_row
*, int);
122 static int scrolling_window (struct window
*, int);
123 static int update_window_line (struct window
*, int, int *);
124 static void mirror_make_current (struct window
*, int);
126 static void check_matrix_pointers (struct glyph_matrix
*,
127 struct glyph_matrix
*);
129 static void mirror_line_dance (struct window
*, int, int, int *, char *);
130 static int update_window_tree (struct window
*, int);
131 static int update_window (struct window
*, int);
132 static int update_frame_1 (struct frame
*, int, int);
133 static int scrolling (struct frame
*);
134 static void set_window_cursor_after_update (struct window
*);
135 static void adjust_frame_glyphs_for_window_redisplay (struct frame
*);
136 static void adjust_frame_glyphs_for_frame_redisplay (struct frame
*);
139 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
140 are supported, so we can check for input during redisplay at
141 regular intervals. */
142 #ifdef EMACS_HAS_USECS
143 #define PERIODIC_PREEMPTION_CHECKING 1
145 #define PERIODIC_PREEMPTION_CHECKING 0
148 #if PERIODIC_PREEMPTION_CHECKING
150 /* Redisplay preemption timers. */
152 static EMACS_TIME preemption_period
;
153 static EMACS_TIME preemption_next_check
;
157 /* Nonzero upon entry to redisplay means do not assume anything about
158 current contents of actual terminal frame; clear and redraw it. */
162 /* Nonzero means last display completed. Zero means it was preempted. */
164 int display_completed
;
166 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
169 /* The currently selected frame. In a single-frame version, this
170 variable always equals the_only_frame. */
172 Lisp_Object selected_frame
;
174 /* A frame which is not just a mini-buffer, or 0 if there are no such
175 frames. This is usually the most recent such frame that was
176 selected. In a single-frame version, this variable always holds
177 the address of the_only_frame. */
179 struct frame
*last_nonminibuf_frame
;
181 /* 1 means SIGWINCH happened when not safe. */
183 static int delayed_size_change
;
185 /* 1 means glyph initialization has been completed at startup. */
187 static int glyphs_initialized_initially_p
;
189 /* Updated window if != 0. Set by update_window. */
191 struct window
*updated_window
;
193 /* Glyph row updated in update_window_line, and area that is updated. */
195 struct glyph_row
*updated_row
;
198 /* A glyph for a space. */
200 struct glyph space_glyph
;
202 /* Counts of allocated structures. These counts serve to diagnose
203 memory leaks and double frees. */
205 static int glyph_matrix_count
;
206 static int glyph_pool_count
;
208 /* If non-null, the frame whose frame matrices are manipulated. If
209 null, window matrices are worked on. */
211 static struct frame
*frame_matrix_frame
;
213 /* Non-zero means that fonts have been loaded since the last glyph
214 matrix adjustments. Redisplay must stop, and glyph matrices must
215 be adjusted when this flag becomes non-zero during display. The
216 reason fonts can be loaded so late is that fonts of fontsets are
217 loaded on demand. Another reason is that a line contains many
218 characters displayed by zero width or very narrow glyphs of
219 variable-width fonts. */
223 /* Convert vpos and hpos from frame to window and vice versa.
224 This may only be used for terminal frames. */
228 static int window_to_frame_vpos (struct window
*, int);
229 static int window_to_frame_hpos (struct window
*, int);
230 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
231 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
233 /* One element of the ring buffer containing redisplay history
236 struct redisplay_history
238 char trace
[512 + 100];
241 /* The size of the history buffer. */
243 #define REDISPLAY_HISTORY_SIZE 30
245 /* The redisplay history buffer. */
247 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
249 /* Next free entry in redisplay_history. */
251 static int history_idx
;
253 /* A tick that's incremented each time something is added to the
256 static uprintmax_t history_tick
;
258 static void add_frame_display_history (struct frame
*, int);
260 /* Add to the redisplay history how window W has been displayed.
261 MSG is a trace containing the information how W's glyph matrix
262 has been constructed. PAUSED_P non-zero means that the update
263 has been interrupted for pending input. */
266 add_window_display_history (struct window
*w
, const char *msg
, int paused_p
)
270 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
272 buf
= redisplay_history
[history_idx
].trace
;
275 snprintf (buf
, sizeof redisplay_history
[0].trace
,
276 "%"pMu
": window %p (`%s')%s\n%s",
279 ((BUFFERP (w
->buffer
)
280 && STRINGP (BVAR (XBUFFER (w
->buffer
), name
)))
281 ? SSDATA (BVAR (XBUFFER (w
->buffer
), name
))
283 paused_p
? " ***paused***" : "",
288 /* Add to the redisplay history that frame F has been displayed.
289 PAUSED_P non-zero means that the update has been interrupted for
293 add_frame_display_history (struct frame
*f
, int paused_p
)
297 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
299 buf
= redisplay_history
[history_idx
].trace
;
302 sprintf (buf
, "%"pMu
": update frame %p%s",
304 f
, paused_p
? " ***paused***" : "");
308 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
309 Sdump_redisplay_history
, 0, 0, "",
310 doc
: /* Dump redisplay history to stderr. */)
315 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
318 i
= REDISPLAY_HISTORY_SIZE
- 1;
319 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
326 #else /* GLYPH_DEBUG == 0 */
328 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
329 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
331 #endif /* GLYPH_DEBUG == 0 */
334 #if defined PROFILING && !HAVE___EXECUTABLE_START
335 /* FIXME: only used to find text start for profiling. */
338 safe_bcopy (const char *from
, char *to
, int size
)
344 /***********************************************************************
346 ***********************************************************************/
348 /* Allocate and return a glyph_matrix structure. POOL is the glyph
349 pool from which memory for the matrix should be allocated, or null
350 for window-based redisplay where no glyph pools are used. The
351 member `pool' of the glyph matrix structure returned is set to
352 POOL, the structure is otherwise zeroed. */
354 static struct glyph_matrix
*
355 new_glyph_matrix (struct glyph_pool
*pool
)
357 struct glyph_matrix
*result
;
359 /* Allocate and clear. */
360 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
361 memset (result
, 0, sizeof *result
);
363 /* Increment number of allocated matrices. This count is used
364 to detect memory leaks. */
365 ++glyph_matrix_count
;
367 /* Set pool and return. */
373 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
375 The global counter glyph_matrix_count is decremented when a matrix
376 is freed. If the count gets negative, more structures were freed
377 than allocated, i.e. one matrix was freed more than once or a bogus
378 pointer was passed to this function.
380 If MATRIX->pool is null, this means that the matrix manages its own
381 glyph memory---this is done for matrices on X frames. Freeing the
382 matrix also frees the glyph memory in this case. */
385 free_glyph_matrix (struct glyph_matrix
*matrix
)
391 /* Detect the case that more matrices are freed than were
393 if (--glyph_matrix_count
< 0)
396 /* Free glyph memory if MATRIX owns it. */
397 if (matrix
->pool
== NULL
)
398 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
399 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
401 /* Free row structures and the matrix itself. */
402 xfree (matrix
->rows
);
408 /* Return the number of glyphs to reserve for a marginal area of
409 window W. TOTAL_GLYPHS is the number of glyphs in a complete
410 display line of window W. MARGIN gives the width of the marginal
411 area in canonical character units. MARGIN should be an integer
415 margin_glyphs_to_reserve (struct window
*w
, int total_glyphs
, Lisp_Object margin
)
419 if (NUMBERP (margin
))
421 int width
= XFASTINT (w
->total_cols
);
422 double d
= max (0, XFLOATINT (margin
));
423 d
= min (width
/ 2 - 1, d
);
424 n
= (int) ((double) total_glyphs
/ width
* d
);
433 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
436 W is null if the function is called for a frame glyph matrix.
437 Otherwise it is the window MATRIX is a member of. X and Y are the
438 indices of the first column and row of MATRIX within the frame
439 matrix, if such a matrix exists. They are zero for purely
440 window-based redisplay. DIM is the needed size of the matrix.
442 In window-based redisplay, where no frame matrices exist, glyph
443 matrices manage their own glyph storage. Otherwise, they allocate
444 storage from a common frame glyph pool which can be found in
447 The reason for this memory management strategy is to avoid complete
448 frame redraws if possible. When we allocate from a common pool, a
449 change of the location or size of a sub-matrix within the pool
450 requires a complete redisplay of the frame because we cannot easily
451 make sure that the current matrices of all windows still agree with
452 what is displayed on the screen. While this is usually fast, it
453 leads to screen flickering. */
456 adjust_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int x
, int y
, struct dim dim
)
460 int marginal_areas_changed_p
= 0;
461 int header_line_changed_p
= 0;
462 int header_line_p
= 0;
463 int left
= -1, right
= -1;
464 int window_width
= -1, window_height
= -1;
466 /* See if W had a header line that has disappeared now, or vice versa.
470 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
472 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
473 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
475 matrix
->header_line_p
= header_line_p
;
477 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
478 Do nothing if MATRIX' size, position, vscroll, and marginal areas
479 haven't changed. This optimization is important because preserving
480 the matrix means preventing redisplay. */
481 if (matrix
->pool
== NULL
)
483 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
484 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
485 xassert (left
>= 0 && right
>= 0);
486 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
487 || right
!= matrix
->right_margin_glyphs
);
489 if (!marginal_areas_changed_p
491 && !header_line_changed_p
492 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
493 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
494 && matrix
->window_height
== window_height
495 && matrix
->window_vscroll
== w
->vscroll
496 && matrix
->window_width
== window_width
)
500 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
501 if (matrix
->rows_allocated
< dim
.height
)
503 int old_alloc
= matrix
->rows_allocated
;
504 new_rows
= dim
.height
- matrix
->rows_allocated
;
505 matrix
->rows
= xpalloc (matrix
->rows
, &matrix
->rows_allocated
,
506 new_rows
, INT_MAX
, sizeof *matrix
->rows
);
507 memset (matrix
->rows
+ old_alloc
, 0,
508 (matrix
->rows_allocated
- old_alloc
) * sizeof *matrix
->rows
);
513 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
514 on a frame not using window-based redisplay. Set up pointers for
515 each row into the glyph pool. */
518 xassert (matrix
->pool
->glyphs
);
522 left
= margin_glyphs_to_reserve (w
, dim
.width
,
523 w
->left_margin_cols
);
524 right
= margin_glyphs_to_reserve (w
, dim
.width
,
525 w
->right_margin_cols
);
530 for (i
= 0; i
< dim
.height
; ++i
)
532 struct glyph_row
*row
= &matrix
->rows
[i
];
534 row
->glyphs
[LEFT_MARGIN_AREA
]
535 = (matrix
->pool
->glyphs
536 + (y
+ i
) * matrix
->pool
->ncolumns
540 || row
== matrix
->rows
+ dim
.height
- 1
541 || (row
== matrix
->rows
&& matrix
->header_line_p
))
543 row
->glyphs
[TEXT_AREA
]
544 = row
->glyphs
[LEFT_MARGIN_AREA
];
545 row
->glyphs
[RIGHT_MARGIN_AREA
]
546 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
547 row
->glyphs
[LAST_AREA
]
548 = row
->glyphs
[RIGHT_MARGIN_AREA
];
552 row
->glyphs
[TEXT_AREA
]
553 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
554 row
->glyphs
[RIGHT_MARGIN_AREA
]
555 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
556 row
->glyphs
[LAST_AREA
]
557 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
561 matrix
->left_margin_glyphs
= left
;
562 matrix
->right_margin_glyphs
= right
;
566 /* If MATRIX->pool is null, MATRIX is responsible for managing
567 its own memory. It is a window matrix for window-based redisplay.
568 Allocate glyph memory from the heap. */
569 if (dim
.width
> matrix
->matrix_w
571 || header_line_changed_p
572 || marginal_areas_changed_p
)
574 struct glyph_row
*row
= matrix
->rows
;
575 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
579 row
->glyphs
[LEFT_MARGIN_AREA
]
580 = xnrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
581 dim
.width
, sizeof (struct glyph
));
583 /* The mode line never has marginal areas. */
584 if (row
== matrix
->rows
+ dim
.height
- 1
585 || (row
== matrix
->rows
&& matrix
->header_line_p
))
587 row
->glyphs
[TEXT_AREA
]
588 = row
->glyphs
[LEFT_MARGIN_AREA
];
589 row
->glyphs
[RIGHT_MARGIN_AREA
]
590 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
591 row
->glyphs
[LAST_AREA
]
592 = row
->glyphs
[RIGHT_MARGIN_AREA
];
596 row
->glyphs
[TEXT_AREA
]
597 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
598 row
->glyphs
[RIGHT_MARGIN_AREA
]
599 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
600 row
->glyphs
[LAST_AREA
]
601 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
607 xassert (left
>= 0 && right
>= 0);
608 matrix
->left_margin_glyphs
= left
;
609 matrix
->right_margin_glyphs
= right
;
612 /* Number of rows to be used by MATRIX. */
613 matrix
->nrows
= dim
.height
;
614 xassert (matrix
->nrows
>= 0);
618 if (matrix
== w
->current_matrix
)
620 /* Mark rows in a current matrix of a window as not having
621 valid contents. It's important to not do this for
622 desired matrices. When Emacs starts, it may already be
623 building desired matrices when this function runs. */
624 if (window_width
< 0)
625 window_width
= window_box_width (w
, -1);
627 /* Optimize the case that only the height has changed (C-x 2,
628 upper window). Invalidate all rows that are no longer part
630 if (!marginal_areas_changed_p
631 && !header_line_changed_p
633 && dim
.width
== matrix
->matrix_w
634 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
635 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
636 && matrix
->window_width
== window_width
)
638 /* Find the last row in the window. */
639 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
640 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
646 /* Window end is invalid, if inside of the rows that
647 are invalidated below. */
648 if (INTEGERP (w
->window_end_vpos
)
649 && XFASTINT (w
->window_end_vpos
) >= i
)
650 w
->window_end_valid
= Qnil
;
652 while (i
< matrix
->nrows
)
653 matrix
->rows
[i
++].enabled_p
= 0;
657 for (i
= 0; i
< matrix
->nrows
; ++i
)
658 matrix
->rows
[i
].enabled_p
= 0;
661 else if (matrix
== w
->desired_matrix
)
663 /* Rows in desired matrices always have to be cleared;
664 redisplay expects this is the case when it runs, so it
665 had better be the case when we adjust matrices between
667 for (i
= 0; i
< matrix
->nrows
; ++i
)
668 matrix
->rows
[i
].enabled_p
= 0;
673 /* Remember last values to be able to optimize frame redraws. */
674 matrix
->matrix_x
= x
;
675 matrix
->matrix_y
= y
;
676 matrix
->matrix_w
= dim
.width
;
677 matrix
->matrix_h
= dim
.height
;
679 /* Record the top y location and height of W at the time the matrix
680 was last adjusted. This is used to optimize redisplay above. */
683 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
684 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
685 matrix
->window_height
= window_height
;
686 matrix
->window_width
= window_width
;
687 matrix
->window_vscroll
= w
->vscroll
;
692 /* Reverse the contents of rows in MATRIX between START and END. The
693 contents of the row at END - 1 end up at START, END - 2 at START +
694 1 etc. This is part of the implementation of rotate_matrix (see
698 reverse_rows (struct glyph_matrix
*matrix
, int start
, int end
)
702 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
704 /* Non-ISO HP/UX compiler doesn't like auto struct
706 struct glyph_row temp
;
707 temp
= matrix
->rows
[i
];
708 matrix
->rows
[i
] = matrix
->rows
[j
];
709 matrix
->rows
[j
] = temp
;
714 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
715 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
716 indices. (Note: this does not copy glyphs, only glyph pointers in
717 row structures are moved around).
719 The algorithm used for rotating the vector was, I believe, first
720 described by Kernighan. See the vector R as consisting of two
721 sub-vectors AB, where A has length BY for BY >= 0. The result
722 after rotating is then BA. Reverse both sub-vectors to get ArBr
723 and reverse the result to get (ArBr)r which is BA. Similar for
727 rotate_matrix (struct glyph_matrix
*matrix
, int first
, int last
, int by
)
731 /* Up (rotate left, i.e. towards lower indices). */
733 reverse_rows (matrix
, first
, first
+ by
);
734 reverse_rows (matrix
, first
+ by
, last
);
735 reverse_rows (matrix
, first
, last
);
739 /* Down (rotate right, i.e. towards higher indices). */
740 reverse_rows (matrix
, last
- by
, last
);
741 reverse_rows (matrix
, first
, last
- by
);
742 reverse_rows (matrix
, first
, last
);
747 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
748 with indices START <= index < END. Increment positions by DELTA/
752 increment_matrix_positions (struct glyph_matrix
*matrix
, int start
, int end
,
753 ptrdiff_t delta
, ptrdiff_t delta_bytes
)
755 /* Check that START and END are reasonable values. */
756 xassert (start
>= 0 && start
<= matrix
->nrows
);
757 xassert (end
>= 0 && end
<= matrix
->nrows
);
758 xassert (start
<= end
);
760 for (; start
< end
; ++start
)
761 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
765 /* Enable a range of rows in glyph matrix MATRIX. START and END are
766 the row indices of the first and last + 1 row to enable. If
767 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
770 enable_glyph_matrix_rows (struct glyph_matrix
*matrix
, int start
, int end
, int enabled_p
)
772 xassert (start
<= end
);
773 xassert (start
>= 0 && start
< matrix
->nrows
);
774 xassert (end
>= 0 && end
<= matrix
->nrows
);
776 for (; start
< end
; ++start
)
777 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
783 This empties all rows in MATRIX by setting the enabled_p flag for
784 all rows of the matrix to zero. The function prepare_desired_row
785 will eventually really clear a row when it sees one with a zero
788 Resets update hints to defaults value. The only update hint
789 currently present is the flag MATRIX->no_scrolling_p. */
792 clear_glyph_matrix (struct glyph_matrix
*matrix
)
796 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
797 matrix
->no_scrolling_p
= 0;
802 /* Shift part of the glyph matrix MATRIX of window W up or down.
803 Increment y-positions in glyph rows between START and END by DY,
804 and recompute their visible height. */
807 shift_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int start
, int end
, int dy
)
811 xassert (start
<= end
);
812 xassert (start
>= 0 && start
< matrix
->nrows
);
813 xassert (end
>= 0 && end
<= matrix
->nrows
);
815 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
816 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
818 for (; start
< end
; ++start
)
820 struct glyph_row
*row
= &matrix
->rows
[start
];
823 row
->visible_height
= row
->height
;
826 row
->visible_height
-= min_y
- row
->y
;
827 if (row
->y
+ row
->height
> max_y
)
828 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
829 if (row
->fringe_bitmap_periodic_p
)
830 row
->redraw_fringe_bitmaps_p
= 1;
835 /* Mark all rows in current matrices of frame F as invalid. Marking
836 invalid is done by setting enabled_p to zero for all rows in a
840 clear_current_matrices (register struct frame
*f
)
842 /* Clear frame current matrix, if we have one. */
843 if (f
->current_matrix
)
844 clear_glyph_matrix (f
->current_matrix
);
846 /* Clear the matrix of the menu bar window, if such a window exists.
847 The menu bar window is currently used to display menus on X when
848 no toolkit support is compiled in. */
849 if (WINDOWP (f
->menu_bar_window
))
850 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
852 /* Clear the matrix of the tool-bar window, if any. */
853 if (WINDOWP (f
->tool_bar_window
))
854 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
856 /* Clear current window matrices. */
857 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
858 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
862 /* Clear out all display lines of F for a coming redisplay. */
865 clear_desired_matrices (register struct frame
*f
)
867 if (f
->desired_matrix
)
868 clear_glyph_matrix (f
->desired_matrix
);
870 if (WINDOWP (f
->menu_bar_window
))
871 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
873 if (WINDOWP (f
->tool_bar_window
))
874 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
876 /* Do it for window matrices. */
877 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
878 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
882 /* Clear matrices in window tree rooted in W. If DESIRED_P is
883 non-zero clear desired matrices, otherwise clear current matrices. */
886 clear_window_matrices (struct window
*w
, int desired_p
)
890 if (!NILP (w
->hchild
))
892 xassert (WINDOWP (w
->hchild
));
893 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
895 else if (!NILP (w
->vchild
))
897 xassert (WINDOWP (w
->vchild
));
898 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
903 clear_glyph_matrix (w
->desired_matrix
);
906 clear_glyph_matrix (w
->current_matrix
);
907 w
->window_end_valid
= Qnil
;
911 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
917 /***********************************************************************
920 See dispextern.h for an overall explanation of glyph rows.
921 ***********************************************************************/
923 /* Clear glyph row ROW. Do it in a way that makes it robust against
924 changes in the glyph_row structure, i.e. addition or removal of
925 structure members. */
927 static struct glyph_row null_row
;
930 clear_glyph_row (struct glyph_row
*row
)
932 struct glyph
*p
[1 + LAST_AREA
];
935 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
936 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
937 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
938 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
943 /* Restore pointers. */
944 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
945 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
946 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
947 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
949 #if 0 /* At some point, some bit-fields of struct glyph were not set,
950 which made glyphs unequal when compared with GLYPH_EQUAL_P.
951 Redisplay outputs such glyphs, and flickering effects were
952 the result. This also depended on the contents of memory
953 returned by xmalloc. If flickering happens again, activate
954 the code below. If the flickering is gone with that, chances
955 are that the flickering has the same reason as here. */
956 memset (p
[0], 0, (char *) p
[LAST_AREA
] - (char *) p
[0]);
961 /* Make ROW an empty, enabled row of canonical character height,
962 in window W starting at y-position Y. */
965 blank_row (struct window
*w
, struct glyph_row
*row
, int y
)
969 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
970 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
972 clear_glyph_row (row
);
974 row
->ascent
= row
->phys_ascent
= 0;
975 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
976 row
->visible_height
= row
->height
;
979 row
->visible_height
-= min_y
- row
->y
;
980 if (row
->y
+ row
->height
> max_y
)
981 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
987 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
988 are the amounts by which to change positions. Note that the first
989 glyph of the text area of a row can have a buffer position even if
990 the used count of the text area is zero. Such rows display line
994 increment_row_positions (struct glyph_row
*row
,
995 ptrdiff_t delta
, ptrdiff_t delta_bytes
)
999 /* Increment start and end positions. */
1000 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1001 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1002 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1003 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1004 CHARPOS (row
->start
.pos
) += delta
;
1005 BYTEPOS (row
->start
.pos
) += delta_bytes
;
1006 CHARPOS (row
->end
.pos
) += delta
;
1007 BYTEPOS (row
->end
.pos
) += delta_bytes
;
1009 if (!row
->enabled_p
)
1012 /* Increment positions in glyphs. */
1013 for (area
= 0; area
< LAST_AREA
; ++area
)
1014 for (i
= 0; i
< row
->used
[area
]; ++i
)
1015 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1016 && row
->glyphs
[area
][i
].charpos
> 0)
1017 row
->glyphs
[area
][i
].charpos
+= delta
;
1019 /* Capture the case of rows displaying a line end. */
1020 if (row
->used
[TEXT_AREA
] == 0
1021 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1022 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1027 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1028 contents, i.e. glyph structure contents are exchanged between A and
1029 B without changing glyph pointers in A and B. */
1032 swap_glyphs_in_rows (struct glyph_row
*a
, struct glyph_row
*b
)
1036 for (area
= 0; area
< LAST_AREA
; ++area
)
1038 /* Number of glyphs to swap. */
1039 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1041 /* Start of glyphs in area of row A. */
1042 struct glyph
*glyph_a
= a
->glyphs
[area
];
1044 /* End + 1 of glyphs in area of row A. */
1045 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1047 /* Start of glyphs in area of row B. */
1048 struct glyph
*glyph_b
= b
->glyphs
[area
];
1050 while (glyph_a
< glyph_a_end
)
1052 /* Non-ISO HP/UX compiler doesn't like auto struct
1056 *glyph_a
= *glyph_b
;
1066 /* Exchange pointers to glyph memory between glyph rows A and B. */
1069 swap_glyph_pointers (struct glyph_row
*a
, struct glyph_row
*b
)
1072 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1074 struct glyph
*temp
= a
->glyphs
[i
];
1075 a
->glyphs
[i
] = b
->glyphs
[i
];
1076 b
->glyphs
[i
] = temp
;
1081 /* Copy glyph row structure FROM to glyph row structure TO, except
1082 that glyph pointers in the structures are left unchanged. */
1085 copy_row_except_pointers (struct glyph_row
*to
, struct glyph_row
*from
)
1087 struct glyph
*pointers
[1 + LAST_AREA
];
1089 /* Save glyph pointers of TO. */
1090 memcpy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1092 /* Do a structure assignment. */
1095 /* Restore original pointers of TO. */
1096 memcpy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1100 /* Assign glyph row FROM to glyph row TO. This works like a structure
1101 assignment TO = FROM, except that glyph pointers are not copied but
1102 exchanged between TO and FROM. Pointers must be exchanged to avoid
1106 assign_row (struct glyph_row
*to
, struct glyph_row
*from
)
1108 swap_glyph_pointers (to
, from
);
1109 copy_row_except_pointers (to
, from
);
1113 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1114 a row in a window matrix, is a slice of the glyph memory of the
1115 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1116 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1117 memory of FRAME_ROW. */
1122 glyph_row_slice_p (struct glyph_row
*window_row
, struct glyph_row
*frame_row
)
1124 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1125 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1126 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1128 return (frame_glyph_start
<= window_glyph_start
1129 && window_glyph_start
< frame_glyph_end
);
1132 #endif /* GLYPH_DEBUG */
1136 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1137 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1138 in WINDOW_MATRIX is found satisfying the condition. */
1140 static struct glyph_row
*
1141 find_glyph_row_slice (struct glyph_matrix
*window_matrix
,
1142 struct glyph_matrix
*frame_matrix
, int row
)
1146 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1148 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1149 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1150 frame_matrix
->rows
+ row
))
1153 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1158 /* Prepare ROW for display. Desired rows are cleared lazily,
1159 i.e. they are only marked as to be cleared by setting their
1160 enabled_p flag to zero. When a row is to be displayed, a prior
1161 call to this function really clears it. */
1164 prepare_desired_row (struct glyph_row
*row
)
1166 if (!row
->enabled_p
)
1168 int rp
= row
->reversed_p
;
1170 clear_glyph_row (row
);
1172 row
->reversed_p
= rp
;
1177 /* Return a hash code for glyph row ROW. */
1180 line_hash_code (struct glyph_row
*row
)
1186 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1187 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1191 int c
= glyph
->u
.ch
;
1192 int face_id
= glyph
->face_id
;
1193 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1195 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1196 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1208 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1209 the number of characters in the line. If must_write_spaces is
1210 zero, leading and trailing spaces are ignored. */
1213 line_draw_cost (struct glyph_matrix
*matrix
, int vpos
)
1215 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1216 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1217 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1219 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1220 ptrdiff_t glyph_table_len
= GLYPH_TABLE_LENGTH
;
1222 /* Ignore trailing and leading spaces if we can. */
1223 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1225 /* Skip from the end over trailing spaces. */
1226 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1229 /* All blank line. */
1233 /* Skip over leading spaces. */
1234 while (CHAR_GLYPH_SPACE_P (*beg
))
1238 /* If we don't have a glyph-table, each glyph is one character,
1239 so return the number of glyphs. */
1240 if (glyph_table_base
== 0)
1244 /* Otherwise, scan the glyphs and accumulate their total length
1251 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1253 if (GLYPH_INVALID_P (g
)
1254 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1257 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1267 /* Test two glyph rows A and B for equality. Value is non-zero if A
1268 and B have equal contents. MOUSE_FACE_P non-zero means compare the
1269 mouse_face_p flags of A and B, too. */
1272 row_equal_p (struct glyph_row
*a
, struct glyph_row
*b
, int mouse_face_p
)
1276 else if (a
->hash
!= b
->hash
)
1280 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1283 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1286 /* Compare glyphs. */
1287 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1289 if (a
->used
[area
] != b
->used
[area
])
1292 a_glyph
= a
->glyphs
[area
];
1293 a_end
= a_glyph
+ a
->used
[area
];
1294 b_glyph
= b
->glyphs
[area
];
1296 while (a_glyph
< a_end
1297 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1298 ++a_glyph
, ++b_glyph
;
1300 if (a_glyph
!= a_end
)
1304 if (a
->fill_line_p
!= b
->fill_line_p
1305 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1306 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1307 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1308 || a
->left_fringe_offset
!= b
->left_fringe_offset
1309 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1310 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1311 || a
->right_fringe_offset
!= b
->right_fringe_offset
1312 || a
->fringe_bitmap_periodic_p
!= b
->fringe_bitmap_periodic_p
1313 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1314 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1315 || a
->overlapped_p
!= b
->overlapped_p
1316 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1317 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1318 || a
->reversed_p
!= b
->reversed_p
1319 /* Different partially visible characters on left margin. */
1321 /* Different height. */
1322 || a
->ascent
!= b
->ascent
1323 || a
->phys_ascent
!= b
->phys_ascent
1324 || a
->phys_height
!= b
->phys_height
1325 || a
->visible_height
!= b
->visible_height
)
1334 /***********************************************************************
1337 See dispextern.h for an overall explanation of glyph pools.
1338 ***********************************************************************/
1340 /* Allocate a glyph_pool structure. The structure returned is
1341 initialized with zeros. The global variable glyph_pool_count is
1342 incremented for each pool allocated. */
1344 static struct glyph_pool
*
1345 new_glyph_pool (void)
1347 struct glyph_pool
*result
;
1349 /* Allocate a new glyph_pool and clear it. */
1350 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1351 memset (result
, 0, sizeof *result
);
1353 /* For memory leak and double deletion checking. */
1360 /* Free a glyph_pool structure POOL. The function may be called with
1361 a null POOL pointer. The global variable glyph_pool_count is
1362 decremented with every pool structure freed. If this count gets
1363 negative, more structures were freed than allocated, i.e. one
1364 structure must have been freed more than once or a bogus pointer
1365 was passed to free_glyph_pool. */
1368 free_glyph_pool (struct glyph_pool
*pool
)
1372 /* More freed than allocated? */
1374 xassert (glyph_pool_count
>= 0);
1376 xfree (pool
->glyphs
);
1382 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1383 columns we need. This function never shrinks a pool. The only
1384 case in which this would make sense, would be when a frame's size
1385 is changed from a large value to a smaller one. But, if someone
1386 does it once, we can expect that he will do it again.
1388 Value is non-zero if the pool changed in a way which makes
1389 re-adjusting window glyph matrices necessary. */
1392 realloc_glyph_pool (struct glyph_pool
*pool
, struct dim matrix_dim
)
1397 changed_p
= (pool
->glyphs
== 0
1398 || matrix_dim
.height
!= pool
->nrows
1399 || matrix_dim
.width
!= pool
->ncolumns
);
1401 /* Enlarge the glyph pool. */
1402 needed
= matrix_dim
.width
;
1403 if (INT_MULTIPLY_OVERFLOW (needed
, matrix_dim
.height
))
1404 memory_full (SIZE_MAX
);
1405 needed
*= matrix_dim
.height
;
1406 if (needed
> pool
->nglyphs
)
1408 ptrdiff_t old_nglyphs
= pool
->nglyphs
;
1409 pool
->glyphs
= xpalloc (pool
->glyphs
, &pool
->nglyphs
,
1410 needed
- old_nglyphs
, -1, sizeof *pool
->glyphs
);
1411 memset (pool
->glyphs
+ old_nglyphs
, 0,
1412 (pool
->nglyphs
- old_nglyphs
) * sizeof *pool
->glyphs
);
1415 /* Remember the number of rows and columns because (a) we use them
1416 to do sanity checks, and (b) the number of columns determines
1417 where rows in the frame matrix start---this must be available to
1418 determine pointers to rows of window sub-matrices. */
1419 pool
->nrows
= matrix_dim
.height
;
1420 pool
->ncolumns
= matrix_dim
.width
;
1427 /***********************************************************************
1429 ***********************************************************************/
1434 /* Flush standard output. This is sometimes useful to call from the debugger.
1435 XXX Maybe this should be changed to flush the current terminal instead of
1439 void flush_stdout (void) EXTERNALLY_VISIBLE
;
1448 /* Check that no glyph pointers have been lost in MATRIX. If a
1449 pointer has been lost, e.g. by using a structure assignment between
1450 rows, at least one pointer must occur more than once in the rows of
1454 check_matrix_pointer_lossage (struct glyph_matrix
*matrix
)
1458 for (i
= 0; i
< matrix
->nrows
; ++i
)
1459 for (j
= 0; j
< matrix
->nrows
; ++j
)
1461 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1462 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1466 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1469 matrix_row (struct glyph_matrix
*matrix
, int row
)
1471 xassert (matrix
&& matrix
->rows
);
1472 xassert (row
>= 0 && row
< matrix
->nrows
);
1474 /* That's really too slow for normal testing because this function
1475 is called almost everywhere. Although---it's still astonishingly
1476 fast, so it is valuable to have for debugging purposes. */
1478 check_matrix_pointer_lossage (matrix
);
1481 return matrix
->rows
+ row
;
1485 #if 0 /* This function makes invalid assumptions when text is
1486 partially invisible. But it might come handy for debugging
1489 /* Check invariants that must hold for an up to date current matrix of
1493 check_matrix_invariants (struct window
*w
)
1495 struct glyph_matrix
*matrix
= w
->current_matrix
;
1496 int yb
= window_text_bottom_y (w
);
1497 struct glyph_row
*row
= matrix
->rows
;
1498 struct glyph_row
*last_text_row
= NULL
;
1499 struct buffer
*saved
= current_buffer
;
1500 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1503 /* This can sometimes happen for a fresh window. */
1504 if (matrix
->nrows
< 2)
1507 set_buffer_temp (buffer
);
1509 /* Note: last row is always reserved for the mode line. */
1510 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1511 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1513 struct glyph_row
*next
= row
+ 1;
1515 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1516 last_text_row
= row
;
1518 /* Check that character and byte positions are in sync. */
1519 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1520 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1521 xassert (BYTEPOS (row
->start
.pos
)
1522 == CHAR_TO_BYTE (CHARPOS (row
->start
.pos
)));
1524 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1525 have such a position temporarily in case of a minibuffer
1526 displaying something like `[Sole completion]' at its end. */
1527 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1529 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1530 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1531 xassert (BYTEPOS (row
->end
.pos
)
1532 == CHAR_TO_BYTE (CHARPOS (row
->end
.pos
)));
1535 /* Check that end position of `row' is equal to start position
1537 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1539 xassert (MATRIX_ROW_END_CHARPOS (row
)
1540 == MATRIX_ROW_START_CHARPOS (next
));
1541 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1542 == MATRIX_ROW_START_BYTEPOS (next
));
1543 xassert (CHARPOS (row
->end
.pos
) == CHARPOS (next
->start
.pos
));
1544 xassert (BYTEPOS (row
->end
.pos
) == BYTEPOS (next
->start
.pos
));
1549 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1550 xassert (w
->desired_matrix
->rows
!= NULL
);
1551 set_buffer_temp (saved
);
1556 #endif /* GLYPH_DEBUG != 0 */
1560 /**********************************************************************
1561 Allocating/ Adjusting Glyph Matrices
1562 **********************************************************************/
1564 /* Allocate glyph matrices over a window tree for a frame-based
1567 X and Y are column/row within the frame glyph matrix where
1568 sub-matrices for the window tree rooted at WINDOW must be
1569 allocated. DIM_ONLY_P non-zero means that the caller of this
1570 function is only interested in the result matrix dimension, and
1571 matrix adjustments should not be performed.
1573 The function returns the total width/height of the sub-matrices of
1574 the window tree. If called on a frame root window, the computation
1575 will take the mini-buffer window into account.
1577 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1579 NEW_LEAF_MATRIX set if any window in the tree did not have a
1580 glyph matrices yet, and
1582 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1583 any window in the tree will be changed or have been changed (see
1586 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1589 Windows are arranged into chains of windows on the same level
1590 through the next fields of window structures. Such a level can be
1591 either a sequence of horizontally adjacent windows from left to
1592 right, or a sequence of vertically adjacent windows from top to
1593 bottom. Each window in a horizontal sequence can be either a leaf
1594 window or a vertical sequence; a window in a vertical sequence can
1595 be either a leaf or a horizontal sequence. All windows in a
1596 horizontal sequence have the same height, and all windows in a
1597 vertical sequence have the same width.
1599 This function uses, for historical reasons, a more general
1600 algorithm to determine glyph matrix dimensions that would be
1603 The matrix height of a horizontal sequence is determined by the
1604 maximum height of any matrix in the sequence. The matrix width of
1605 a horizontal sequence is computed by adding up matrix widths of
1606 windows in the sequence.
1608 |<------- result width ------->|
1609 +---------+----------+---------+ ---
1612 +---------+ | | result height
1617 The matrix width of a vertical sequence is the maximum matrix width
1618 of any window in the sequence. Its height is computed by adding up
1619 matrix heights of windows in the sequence.
1621 |<---- result width -->|
1629 +------------+---------+ |
1632 +------------+---------+ --- */
1634 /* Bit indicating that a new matrix will be allocated or has been
1637 #define NEW_LEAF_MATRIX (1 << 0)
1639 /* Bit indicating that a matrix will or has changed its location or
1642 #define CHANGED_LEAF_MATRIX (1 << 1)
1645 allocate_matrices_for_frame_redisplay (Lisp_Object window
, int x
, int y
,
1646 int dim_only_p
, int *window_change_flags
)
1648 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1650 int wmax
= 0, hmax
= 0;
1654 int in_horz_combination_p
;
1656 /* What combination is WINDOW part of? Compute this once since the
1657 result is the same for all windows in the `next' chain. The
1658 special case of a root window (parent equal to nil) is treated
1659 like a vertical combination because a root window's `next'
1660 points to the mini-buffer window, if any, which is arranged
1661 vertically below other windows. */
1662 in_horz_combination_p
1663 = (!NILP (XWINDOW (window
)->parent
)
1664 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1666 /* For WINDOW and all windows on the same level. */
1669 w
= XWINDOW (window
);
1671 /* Get the dimension of the window sub-matrix for W, depending
1672 on whether this is a combination or a leaf window. */
1673 if (!NILP (w
->hchild
))
1674 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1676 window_change_flags
);
1677 else if (!NILP (w
->vchild
))
1678 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1680 window_change_flags
);
1683 /* If not already done, allocate sub-matrix structures. */
1684 if (w
->desired_matrix
== NULL
)
1686 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1687 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1688 *window_change_flags
|= NEW_LEAF_MATRIX
;
1691 /* Width and height MUST be chosen so that there are no
1692 holes in the frame matrix. */
1693 dim
.width
= required_matrix_width (w
);
1694 dim
.height
= required_matrix_height (w
);
1696 /* Will matrix be re-allocated? */
1697 if (x
!= w
->desired_matrix
->matrix_x
1698 || y
!= w
->desired_matrix
->matrix_y
1699 || dim
.width
!= w
->desired_matrix
->matrix_w
1700 || dim
.height
!= w
->desired_matrix
->matrix_h
1701 || (margin_glyphs_to_reserve (w
, dim
.width
,
1702 w
->left_margin_cols
)
1703 != w
->desired_matrix
->left_margin_glyphs
)
1704 || (margin_glyphs_to_reserve (w
, dim
.width
,
1705 w
->right_margin_cols
)
1706 != w
->desired_matrix
->right_margin_glyphs
))
1707 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1709 /* Actually change matrices, if allowed. Do not consider
1710 CHANGED_LEAF_MATRIX computed above here because the pool
1711 may have been changed which we don't now here. We trust
1712 that we only will be called with DIM_ONLY_P != 0 when
1716 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1717 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1721 /* If we are part of a horizontal combination, advance x for
1722 windows to the right of W; otherwise advance y for windows
1724 if (in_horz_combination_p
)
1729 /* Remember maximum glyph matrix dimensions. */
1730 wmax
= max (wmax
, dim
.width
);
1731 hmax
= max (hmax
, dim
.height
);
1733 /* Next window on same level. */
1736 while (!NILP (window
));
1738 /* Set `total' to the total glyph matrix dimension of this window
1739 level. In a vertical combination, the width is the width of the
1740 widest window; the height is the y we finally reached, corrected
1741 by the y we started with. In a horizontal combination, the total
1742 height is the height of the tallest window, and the width is the
1743 x we finally reached, corrected by the x we started with. */
1744 if (in_horz_combination_p
)
1746 total
.width
= x
- x0
;
1747 total
.height
= hmax
;
1752 total
.height
= y
- y0
;
1759 /* Return the required height of glyph matrices for window W. */
1762 required_matrix_height (struct window
*w
)
1764 #ifdef HAVE_WINDOW_SYSTEM
1765 struct frame
*f
= XFRAME (w
->frame
);
1767 if (FRAME_WINDOW_P (f
))
1769 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1770 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
1771 return (((window_pixel_height
+ ch_height
- 1)
1772 / ch_height
) * w
->nrows_scale_factor
1773 /* One partially visible line at the top and
1774 bottom of the window. */
1776 /* 2 for header and mode line. */
1779 #endif /* HAVE_WINDOW_SYSTEM */
1781 return WINDOW_TOTAL_LINES (w
);
1785 /* Return the required width of glyph matrices for window W. */
1788 required_matrix_width (struct window
*w
)
1790 #ifdef HAVE_WINDOW_SYSTEM
1791 struct frame
*f
= XFRAME (w
->frame
);
1792 if (FRAME_WINDOW_P (f
))
1794 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
1795 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
1797 /* Compute number of glyphs needed in a glyph row. */
1798 return (((window_pixel_width
+ ch_width
- 1)
1799 / ch_width
) * w
->ncols_scale_factor
1800 /* 2 partially visible columns in the text area. */
1802 /* One partially visible column at the right
1803 edge of each marginal area. */
1806 #endif /* HAVE_WINDOW_SYSTEM */
1808 return XINT (w
->total_cols
);
1812 /* Allocate window matrices for window-based redisplay. W is the
1813 window whose matrices must be allocated/reallocated. */
1816 allocate_matrices_for_window_redisplay (struct window
*w
)
1820 if (!NILP (w
->vchild
))
1821 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
1822 else if (!NILP (w
->hchild
))
1823 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
1826 /* W is a leaf window. */
1829 /* If matrices are not yet allocated, allocate them now. */
1830 if (w
->desired_matrix
== NULL
)
1832 w
->desired_matrix
= new_glyph_matrix (NULL
);
1833 w
->current_matrix
= new_glyph_matrix (NULL
);
1836 dim
.width
= required_matrix_width (w
);
1837 dim
.height
= required_matrix_height (w
);
1838 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
1839 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
1842 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
1847 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
1848 do it for all frames; otherwise do it just for the given frame.
1849 This function must be called when a new frame is created, its size
1850 changes, or its window configuration changes. */
1853 adjust_glyphs (struct frame
*f
)
1855 /* Block input so that expose events and other events that access
1856 glyph matrices are not processed while we are changing them. */
1860 adjust_frame_glyphs (f
);
1863 Lisp_Object tail
, lisp_frame
;
1865 FOR_EACH_FRAME (tail
, lisp_frame
)
1866 adjust_frame_glyphs (XFRAME (lisp_frame
));
1873 /* Adjust frame glyphs when Emacs is initialized.
1875 To be called from init_display.
1877 We need a glyph matrix because redraw will happen soon.
1878 Unfortunately, window sizes on selected_frame are not yet set to
1879 meaningful values. I believe we can assume that there are only two
1880 windows on the frame---the mini-buffer and the root window. Frame
1881 height and width seem to be correct so far. So, set the sizes of
1882 windows to estimated values. */
1885 adjust_frame_glyphs_initially (void)
1887 struct frame
*sf
= SELECTED_FRAME ();
1888 struct window
*root
= XWINDOW (sf
->root_window
);
1889 struct window
*mini
= XWINDOW (root
->next
);
1890 int frame_lines
= FRAME_LINES (sf
);
1891 int frame_cols
= FRAME_COLS (sf
);
1892 int top_margin
= FRAME_TOP_MARGIN (sf
);
1894 /* Do it for the root window. */
1895 XSETFASTINT (root
->top_line
, top_margin
);
1896 XSETFASTINT (root
->total_lines
, frame_lines
- 1 - top_margin
);
1897 XSETFASTINT (root
->total_cols
, frame_cols
);
1899 /* Do it for the mini-buffer window. */
1900 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
1901 XSETFASTINT (mini
->total_lines
, 1);
1902 XSETFASTINT (mini
->total_cols
, frame_cols
);
1904 adjust_frame_glyphs (sf
);
1905 glyphs_initialized_initially_p
= 1;
1909 /* Allocate/reallocate glyph matrices of a single frame F. */
1912 adjust_frame_glyphs (struct frame
*f
)
1914 if (FRAME_WINDOW_P (f
))
1915 adjust_frame_glyphs_for_window_redisplay (f
);
1917 adjust_frame_glyphs_for_frame_redisplay (f
);
1919 /* Don't forget the message buffer and the buffer for
1920 decode_mode_spec. */
1921 adjust_frame_message_buffer (f
);
1922 adjust_decode_mode_spec_buffer (f
);
1924 f
->glyphs_initialized_p
= 1;
1927 /* Return 1 if any window in the tree has nonzero window margins. See
1928 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
1930 showing_window_margins_p (struct window
*w
)
1934 if (!NILP (w
->hchild
))
1936 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
1939 else if (!NILP (w
->vchild
))
1941 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
1944 else if (!NILP (w
->left_margin_cols
)
1945 || !NILP (w
->right_margin_cols
))
1948 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1954 /* In the window tree with root W, build current matrices of leaf
1955 windows from the frame's current matrix. */
1958 fake_current_matrices (Lisp_Object window
)
1962 for (; !NILP (window
); window
= w
->next
)
1964 w
= XWINDOW (window
);
1966 if (!NILP (w
->hchild
))
1967 fake_current_matrices (w
->hchild
);
1968 else if (!NILP (w
->vchild
))
1969 fake_current_matrices (w
->vchild
);
1973 struct frame
*f
= XFRAME (w
->frame
);
1974 struct glyph_matrix
*m
= w
->current_matrix
;
1975 struct glyph_matrix
*fm
= f
->current_matrix
;
1977 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
1978 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
1980 for (i
= 0; i
< m
->matrix_h
; ++i
)
1982 struct glyph_row
*r
= m
->rows
+ i
;
1983 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
1985 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
1986 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
1988 r
->enabled_p
= fr
->enabled_p
;
1991 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
1992 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
1993 r
->used
[TEXT_AREA
] = (m
->matrix_w
1994 - r
->used
[LEFT_MARGIN_AREA
]
1995 - r
->used
[RIGHT_MARGIN_AREA
]);
2004 /* Save away the contents of frame F's current frame matrix. Value is
2005 a glyph matrix holding the contents of F's current frame matrix. */
2007 static struct glyph_matrix
*
2008 save_current_matrix (struct frame
*f
)
2011 struct glyph_matrix
*saved
;
2013 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2014 memset (saved
, 0, sizeof *saved
);
2015 saved
->nrows
= f
->current_matrix
->nrows
;
2016 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2017 * sizeof *saved
->rows
);
2018 memset (saved
->rows
, 0, saved
->nrows
* sizeof *saved
->rows
);
2020 for (i
= 0; i
< saved
->nrows
; ++i
)
2022 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2023 struct glyph_row
*to
= saved
->rows
+ i
;
2024 ptrdiff_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2025 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2026 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2027 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2034 /* Restore the contents of frame F's current frame matrix from SAVED,
2035 and free memory associated with SAVED. */
2038 restore_current_matrix (struct frame
*f
, struct glyph_matrix
*saved
)
2042 for (i
= 0; i
< saved
->nrows
; ++i
)
2044 struct glyph_row
*from
= saved
->rows
+ i
;
2045 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2046 ptrdiff_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2047 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2048 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2049 xfree (from
->glyphs
[TEXT_AREA
]);
2052 xfree (saved
->rows
);
2058 /* Allocate/reallocate glyph matrices of a single frame F for
2059 frame-based redisplay. */
2062 adjust_frame_glyphs_for_frame_redisplay (struct frame
*f
)
2064 struct dim matrix_dim
;
2066 int window_change_flags
;
2069 if (!FRAME_LIVE_P (f
))
2072 top_window_y
= FRAME_TOP_MARGIN (f
);
2074 /* Allocate glyph pool structures if not already done. */
2075 if (f
->desired_pool
== NULL
)
2077 f
->desired_pool
= new_glyph_pool ();
2078 f
->current_pool
= new_glyph_pool ();
2081 /* Allocate frames matrix structures if needed. */
2082 if (f
->desired_matrix
== NULL
)
2084 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2085 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2088 /* Compute window glyph matrices. (This takes the mini-buffer
2089 window into account). The result is the size of the frame glyph
2090 matrix needed. The variable window_change_flags is set to a bit
2091 mask indicating whether new matrices will be allocated or
2092 existing matrices change their size or location within the frame
2094 window_change_flags
= 0;
2096 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2099 &window_change_flags
);
2101 /* Add in menu bar lines, if any. */
2102 matrix_dim
.height
+= top_window_y
;
2104 /* Enlarge pools as necessary. */
2105 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2106 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2108 /* Set up glyph pointers within window matrices. Do this only if
2109 absolutely necessary since it requires a frame redraw. */
2110 if (pool_changed_p
|| window_change_flags
)
2112 /* Do it for window matrices. */
2113 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2115 &window_change_flags
);
2117 /* Size of frame matrices must equal size of frame. Note
2118 that we are called for X frames with window widths NOT equal
2119 to the frame width (from CHANGE_FRAME_SIZE_1). */
2120 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2121 && matrix_dim
.height
== FRAME_LINES (f
));
2123 /* Pointers to glyph memory in glyph rows are exchanged during
2124 the update phase of redisplay, which means in general that a
2125 frame's current matrix consists of pointers into both the
2126 desired and current glyph pool of the frame. Adjusting a
2127 matrix sets the frame matrix up so that pointers are all into
2128 the same pool. If we want to preserve glyph contents of the
2129 current matrix over a call to adjust_glyph_matrix, we must
2130 make a copy of the current glyphs, and restore the current
2131 matrix' contents from that copy. */
2132 if (display_completed
2133 && !FRAME_GARBAGED_P (f
)
2134 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2135 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2136 /* For some reason, the frame glyph matrix gets corrupted if
2137 any of the windows contain margins. I haven't been able
2138 to hunt down the reason, but for the moment this prevents
2139 the problem from manifesting. -- cyd */
2140 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2142 struct glyph_matrix
*copy
= save_current_matrix (f
);
2143 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2144 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2145 restore_current_matrix (f
, copy
);
2146 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2150 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2151 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2152 SET_FRAME_GARBAGED (f
);
2158 /* Allocate/reallocate glyph matrices of a single frame F for
2159 window-based redisplay. */
2162 adjust_frame_glyphs_for_window_redisplay (struct frame
*f
)
2164 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2166 /* Allocate/reallocate window matrices. */
2167 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2169 #ifdef HAVE_X_WINDOWS
2170 /* Allocate/ reallocate matrices of the dummy window used to display
2171 the menu bar under X when no X toolkit support is available. */
2172 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2174 /* Allocate a dummy window if not already done. */
2176 if (NILP (f
->menu_bar_window
))
2178 f
->menu_bar_window
= make_window ();
2179 w
= XWINDOW (f
->menu_bar_window
);
2180 XSETFRAME (w
->frame
, f
);
2181 w
->pseudo_window_p
= 1;
2184 w
= XWINDOW (f
->menu_bar_window
);
2186 /* Set window dimensions to frame dimensions and allocate or
2187 adjust glyph matrices of W. */
2188 XSETFASTINT (w
->top_line
, 0);
2189 XSETFASTINT (w
->left_col
, 0);
2190 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2191 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2192 allocate_matrices_for_window_redisplay (w
);
2194 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2195 #endif /* HAVE_X_WINDOWS */
2199 /* Allocate/ reallocate matrices of the tool bar window. If we
2200 don't have a tool bar window yet, make one. */
2202 if (NILP (f
->tool_bar_window
))
2204 f
->tool_bar_window
= make_window ();
2205 w
= XWINDOW (f
->tool_bar_window
);
2206 XSETFRAME (w
->frame
, f
);
2207 w
->pseudo_window_p
= 1;
2210 w
= XWINDOW (f
->tool_bar_window
);
2212 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2213 XSETFASTINT (w
->left_col
, 0);
2214 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2215 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2216 allocate_matrices_for_window_redisplay (w
);
2222 /* Adjust/ allocate message buffer of frame F.
2224 Note that the message buffer is never freed. Since I could not
2225 find a free in 19.34, I assume that freeing it would be
2226 problematic in some way and don't do it either.
2228 (Implementation note: It should be checked if we can free it
2229 eventually without causing trouble). */
2232 adjust_frame_message_buffer (struct frame
*f
)
2234 ptrdiff_t size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2236 if (FRAME_MESSAGE_BUF (f
))
2238 char *buffer
= FRAME_MESSAGE_BUF (f
);
2239 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2240 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2243 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2247 /* Re-allocate buffer for decode_mode_spec on frame F. */
2250 adjust_decode_mode_spec_buffer (struct frame
*f
)
2252 f
->decode_mode_spec_buffer
2253 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2254 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2259 /**********************************************************************
2260 Freeing Glyph Matrices
2261 **********************************************************************/
2263 /* Free glyph memory for a frame F. F may be null. This function can
2264 be called for the same frame more than once. The root window of
2265 F may be nil when this function is called. This is the case when
2266 the function is called when F is destroyed. */
2269 free_glyphs (struct frame
*f
)
2271 if (f
&& f
->glyphs_initialized_p
)
2273 /* Block interrupt input so that we don't get surprised by an X
2274 event while we're in an inconsistent state. */
2276 f
->glyphs_initialized_p
= 0;
2278 /* Release window sub-matrices. */
2279 if (!NILP (f
->root_window
))
2280 free_window_matrices (XWINDOW (f
->root_window
));
2282 /* Free the dummy window for menu bars without X toolkit and its
2284 if (!NILP (f
->menu_bar_window
))
2286 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2287 free_glyph_matrix (w
->desired_matrix
);
2288 free_glyph_matrix (w
->current_matrix
);
2289 w
->desired_matrix
= w
->current_matrix
= NULL
;
2290 f
->menu_bar_window
= Qnil
;
2293 /* Free the tool bar window and its glyph matrices. */
2294 if (!NILP (f
->tool_bar_window
))
2296 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2297 free_glyph_matrix (w
->desired_matrix
);
2298 free_glyph_matrix (w
->current_matrix
);
2299 w
->desired_matrix
= w
->current_matrix
= NULL
;
2300 f
->tool_bar_window
= Qnil
;
2303 /* Release frame glyph matrices. Reset fields to zero in
2304 case we are called a second time. */
2305 if (f
->desired_matrix
)
2307 free_glyph_matrix (f
->desired_matrix
);
2308 free_glyph_matrix (f
->current_matrix
);
2309 f
->desired_matrix
= f
->current_matrix
= NULL
;
2312 /* Release glyph pools. */
2313 if (f
->desired_pool
)
2315 free_glyph_pool (f
->desired_pool
);
2316 free_glyph_pool (f
->current_pool
);
2317 f
->desired_pool
= f
->current_pool
= NULL
;
2325 /* Free glyph sub-matrices in the window tree rooted at W. This
2326 function may be called with a null pointer, and it may be called on
2327 the same tree more than once. */
2330 free_window_matrices (struct window
*w
)
2334 if (!NILP (w
->hchild
))
2335 free_window_matrices (XWINDOW (w
->hchild
));
2336 else if (!NILP (w
->vchild
))
2337 free_window_matrices (XWINDOW (w
->vchild
));
2340 /* This is a leaf window. Free its memory and reset fields
2341 to zero in case this function is called a second time for
2343 free_glyph_matrix (w
->current_matrix
);
2344 free_glyph_matrix (w
->desired_matrix
);
2345 w
->current_matrix
= w
->desired_matrix
= NULL
;
2348 /* Next window on same level. */
2349 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2354 /* Check glyph memory leaks. This function is called from
2355 shut_down_emacs. Note that frames are not destroyed when Emacs
2356 exits. We therefore free all glyph memory for all active frames
2357 explicitly and check that nothing is left allocated. */
2360 check_glyph_memory (void)
2362 Lisp_Object tail
, frame
;
2364 /* Free glyph memory for all frames. */
2365 FOR_EACH_FRAME (tail
, frame
)
2366 free_glyphs (XFRAME (frame
));
2368 /* Check that nothing is left allocated. */
2369 if (glyph_matrix_count
)
2371 if (glyph_pool_count
)
2377 /**********************************************************************
2378 Building a Frame Matrix
2379 **********************************************************************/
2381 /* Most of the redisplay code works on glyph matrices attached to
2382 windows. This is a good solution most of the time, but it is not
2383 suitable for terminal code. Terminal output functions cannot rely
2384 on being able to set an arbitrary terminal window. Instead they
2385 must be provided with a view of the whole frame, i.e. the whole
2386 screen. We build such a view by constructing a frame matrix from
2387 window matrices in this section.
2389 Windows that must be updated have their must_be_update_p flag set.
2390 For all such windows, their desired matrix is made part of the
2391 desired frame matrix. For other windows, their current matrix is
2392 made part of the desired frame matrix.
2394 +-----------------+----------------+
2395 | desired | desired |
2397 +-----------------+----------------+
2400 +----------------------------------+
2402 Desired window matrices can be made part of the frame matrix in a
2403 cheap way: We exploit the fact that the desired frame matrix and
2404 desired window matrices share their glyph memory. This is not
2405 possible for current window matrices. Their glyphs are copied to
2406 the desired frame matrix. The latter is equivalent to
2407 preserve_other_columns in the old redisplay.
2409 Used glyphs counters for frame matrix rows are the result of adding
2410 up glyph lengths of the window matrices. A line in the frame
2411 matrix is enabled, if a corresponding line in a window matrix is
2414 After building the desired frame matrix, it will be passed to
2415 terminal code, which will manipulate both the desired and current
2416 frame matrix. Changes applied to the frame's current matrix have
2417 to be visible in current window matrices afterwards, of course.
2419 This problem is solved like this:
2421 1. Window and frame matrices share glyphs. Window matrices are
2422 constructed in a way that their glyph contents ARE the glyph
2423 contents needed in a frame matrix. Thus, any modification of
2424 glyphs done in terminal code will be reflected in window matrices
2427 2. Exchanges of rows in a frame matrix done by terminal code are
2428 intercepted by hook functions so that corresponding row operations
2429 on window matrices can be performed. This is necessary because we
2430 use pointers to glyphs in glyph row structures. To satisfy the
2431 assumption of point 1 above that glyphs are updated implicitly in
2432 window matrices when they are manipulated via the frame matrix,
2433 window and frame matrix must of course agree where to find the
2434 glyphs for their rows. Possible manipulations that must be
2435 mirrored are assignments of rows of the desired frame matrix to the
2436 current frame matrix and scrolling the current frame matrix. */
2438 /* Build frame F's desired matrix from window matrices. Only windows
2439 which have the flag must_be_updated_p set have to be updated. Menu
2440 bar lines of a frame are not covered by window matrices, so make
2441 sure not to touch them in this function. */
2444 build_frame_matrix (struct frame
*f
)
2448 /* F must have a frame matrix when this function is called. */
2449 xassert (!FRAME_WINDOW_P (f
));
2451 /* Clear all rows in the frame matrix covered by window matrices.
2452 Menu bar lines are not covered by windows. */
2453 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2454 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2456 /* Build the matrix by walking the window tree. */
2457 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2458 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2462 /* Walk a window tree, building a frame matrix MATRIX from window
2463 matrices. W is the root of a window tree. */
2466 build_frame_matrix_from_window_tree (struct glyph_matrix
*matrix
, struct window
*w
)
2470 if (!NILP (w
->hchild
))
2471 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2472 else if (!NILP (w
->vchild
))
2473 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2475 build_frame_matrix_from_leaf_window (matrix
, w
);
2477 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2482 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2483 desired frame matrix built. W is a leaf window whose desired or
2484 current matrix is to be added to FRAME_MATRIX. W's flag
2485 must_be_updated_p determines which matrix it contributes to
2486 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2487 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2488 Adding a desired matrix means setting up used counters and such in
2489 frame rows, while adding a current window matrix to FRAME_MATRIX
2490 means copying glyphs. The latter case corresponds to
2491 preserve_other_columns in the old redisplay. */
2494 build_frame_matrix_from_leaf_window (struct glyph_matrix
*frame_matrix
, struct window
*w
)
2496 struct glyph_matrix
*window_matrix
;
2497 int window_y
, frame_y
;
2498 /* If non-zero, a glyph to insert at the right border of W. */
2499 GLYPH right_border_glyph
;
2501 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2503 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2504 if (w
->must_be_updated_p
)
2506 window_matrix
= w
->desired_matrix
;
2508 /* Decide whether we want to add a vertical border glyph. */
2509 if (!WINDOW_RIGHTMOST_P (w
))
2511 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2514 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2516 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
)))
2518 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2519 spec_glyph_lookup_face (w
, &right_border_glyph
);
2522 if (GLYPH_FACE (right_border_glyph
) <= 0)
2523 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2527 window_matrix
= w
->current_matrix
;
2529 /* For all rows in the window matrix and corresponding rows in the
2532 frame_y
= window_matrix
->matrix_y
;
2533 while (window_y
< window_matrix
->nrows
)
2535 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2536 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2537 int current_row_p
= window_matrix
== w
->current_matrix
;
2539 /* Fill up the frame row with spaces up to the left margin of the
2541 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2543 /* Fill up areas in the window matrix row with spaces. */
2544 fill_up_glyph_row_with_spaces (window_row
);
2546 /* If only part of W's desired matrix has been built, and
2547 window_row wasn't displayed, use the corresponding current
2549 if (window_matrix
== w
->desired_matrix
2550 && !window_row
->enabled_p
)
2552 window_row
= w
->current_matrix
->rows
+ window_y
;
2558 /* Copy window row to frame row. */
2559 memcpy (frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2560 window_row
->glyphs
[0],
2561 window_matrix
->matrix_w
* sizeof (struct glyph
));
2565 xassert (window_row
->enabled_p
);
2567 /* Only when a desired row has been displayed, we want
2568 the corresponding frame row to be updated. */
2569 frame_row
->enabled_p
= 1;
2571 /* Maybe insert a vertical border between horizontally adjacent
2573 if (GLYPH_CHAR (right_border_glyph
) != 0)
2575 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2576 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2580 /* Window row window_y must be a slice of frame row
2582 xassert (glyph_row_slice_p (window_row
, frame_row
));
2584 /* If rows are in sync, we don't have to copy glyphs because
2585 frame and window share glyphs. */
2587 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2588 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2592 /* Set number of used glyphs in the frame matrix. Since we fill
2593 up with spaces, and visit leaf windows from left to right it
2594 can be done simply. */
2595 frame_row
->used
[TEXT_AREA
]
2596 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2604 /* Given a user-specified glyph, possibly including a Lisp-level face
2605 ID, return a glyph that has a realized face ID.
2606 This is used for glyphs displayed specially and not part of the text;
2607 for instance, vertical separators, truncation markers, etc. */
2610 spec_glyph_lookup_face (struct window
*w
, GLYPH
*glyph
)
2612 int lface_id
= GLYPH_FACE (*glyph
);
2613 /* Convert the glyph's specified face to a realized (cache) face. */
2616 int face_id
= merge_faces (XFRAME (w
->frame
),
2617 Qt
, lface_id
, DEFAULT_FACE_ID
);
2618 SET_GLYPH_FACE (*glyph
, face_id
);
2622 /* Add spaces to a glyph row ROW in a window matrix.
2624 Each row has the form:
2626 +---------+-----------------------------+------------+
2627 | left | text | right |
2628 +---------+-----------------------------+------------+
2630 Left and right marginal areas are optional. This function adds
2631 spaces to areas so that there are no empty holes between areas.
2632 In other words: If the right area is not empty, the text area
2633 is filled up with spaces up to the right area. If the text area
2634 is not empty, the left area is filled up.
2636 To be called for frame-based redisplay, only. */
2639 fill_up_glyph_row_with_spaces (struct glyph_row
*row
)
2641 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2642 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2643 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2647 /* Fill area AREA of glyph row ROW with spaces. To be called for
2648 frame-based redisplay only. */
2651 fill_up_glyph_row_area_with_spaces (struct glyph_row
*row
, int area
)
2653 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2655 struct glyph
*end
= row
->glyphs
[area
+ 1];
2656 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2659 *text
++ = space_glyph
;
2660 row
->used
[area
] = text
- row
->glyphs
[area
];
2665 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2666 reached. In frame matrices only one area, TEXT_AREA, is used. */
2669 fill_up_frame_row_with_spaces (struct glyph_row
*row
, int upto
)
2671 int i
= row
->used
[TEXT_AREA
];
2672 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2675 glyph
[i
++] = space_glyph
;
2677 row
->used
[TEXT_AREA
] = i
;
2682 /**********************************************************************
2683 Mirroring operations on frame matrices in window matrices
2684 **********************************************************************/
2686 /* Set frame being updated via frame-based redisplay to F. This
2687 function must be called before updates to make explicit that we are
2688 working on frame matrices or not. */
2691 set_frame_matrix_frame (struct frame
*f
)
2693 frame_matrix_frame
= f
;
2697 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2698 DESIRED_MATRIX is the desired matrix corresponding to
2699 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2700 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2701 frame_matrix_frame is non-null, this indicates that the exchange is
2702 done in frame matrices, and that we have to perform analogous
2703 operations in window matrices of frame_matrix_frame. */
2706 make_current (struct glyph_matrix
*desired_matrix
, struct glyph_matrix
*current_matrix
, int row
)
2708 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2709 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2710 int mouse_face_p
= current_row
->mouse_face_p
;
2712 /* Do current_row = desired_row. This exchanges glyph pointers
2713 between both rows, and does a structure assignment otherwise. */
2714 assign_row (current_row
, desired_row
);
2716 /* Enable current_row to mark it as valid. */
2717 current_row
->enabled_p
= 1;
2718 current_row
->mouse_face_p
= mouse_face_p
;
2720 /* If we are called on frame matrices, perform analogous operations
2721 for window matrices. */
2722 if (frame_matrix_frame
)
2723 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2727 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2728 W's frame which has been made current (by swapping pointers between
2729 current and desired matrix). Perform analogous operations in the
2730 matrices of leaf windows in the window tree rooted at W. */
2733 mirror_make_current (struct window
*w
, int frame_row
)
2737 if (!NILP (w
->hchild
))
2738 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2739 else if (!NILP (w
->vchild
))
2740 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2743 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2744 here because the checks performed in debug mode there
2745 will not allow the conversion. */
2746 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2748 /* If FRAME_ROW is within W, assign the desired row to the
2749 current row (exchanging glyph pointers). */
2750 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2752 struct glyph_row
*current_row
2753 = MATRIX_ROW (w
->current_matrix
, row
);
2754 struct glyph_row
*desired_row
2755 = MATRIX_ROW (w
->desired_matrix
, row
);
2757 if (desired_row
->enabled_p
)
2758 assign_row (current_row
, desired_row
);
2760 swap_glyph_pointers (desired_row
, current_row
);
2761 current_row
->enabled_p
= 1;
2763 /* Set the Y coordinate of the mode/header line's row.
2764 It is needed in draw_row_with_mouse_face to find the
2765 screen coordinates. (Window-based redisplay sets
2766 this in update_window, but no one seems to do that
2767 for frame-based redisplay.) */
2768 if (current_row
->mode_line_p
)
2769 current_row
->y
= row
;
2773 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2778 /* Perform row dance after scrolling. We are working on the range of
2779 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2780 including) in MATRIX. COPY_FROM is a vector containing, for each
2781 row I in the range 0 <= I < NLINES, the index of the original line
2782 to move to I. This index is relative to the row range, i.e. 0 <=
2783 index < NLINES. RETAINED_P is a vector containing zero for each
2784 row 0 <= I < NLINES which is empty.
2786 This function is called from do_scrolling and do_direct_scrolling. */
2789 mirrored_line_dance (struct glyph_matrix
*matrix
, int unchanged_at_top
, int nlines
,
2790 int *copy_from
, char *retained_p
)
2792 /* A copy of original rows. */
2793 struct glyph_row
*old_rows
;
2795 /* Rows to assign to. */
2796 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2800 /* Make a copy of the original rows. */
2801 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2802 memcpy (old_rows
, new_rows
, nlines
* sizeof *old_rows
);
2804 /* Assign new rows, maybe clear lines. */
2805 for (i
= 0; i
< nlines
; ++i
)
2807 int enabled_before_p
= new_rows
[i
].enabled_p
;
2809 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2810 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2811 new_rows
[i
] = old_rows
[copy_from
[i
]];
2812 new_rows
[i
].enabled_p
= enabled_before_p
;
2814 /* RETAINED_P is zero for empty lines. */
2815 if (!retained_p
[copy_from
[i
]])
2816 new_rows
[i
].enabled_p
= 0;
2819 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2820 if (frame_matrix_frame
)
2821 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2822 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2826 /* Synchronize glyph pointers in the current matrix of window W with
2827 the current frame matrix. */
2830 sync_window_with_frame_matrix_rows (struct window
*w
)
2832 struct frame
*f
= XFRAME (w
->frame
);
2833 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2834 int left
, right
, x
, width
;
2836 /* Preconditions: W must be a leaf window on a tty frame. */
2837 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2838 xassert (!FRAME_WINDOW_P (f
));
2840 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
2841 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
2842 x
= w
->current_matrix
->matrix_x
;
2843 width
= w
->current_matrix
->matrix_w
;
2845 window_row
= w
->current_matrix
->rows
;
2846 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
2847 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
2849 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
2851 window_row
->glyphs
[LEFT_MARGIN_AREA
]
2852 = frame_row
->glyphs
[0] + x
;
2853 window_row
->glyphs
[TEXT_AREA
]
2854 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
2855 window_row
->glyphs
[LAST_AREA
]
2856 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
2857 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
2858 = window_row
->glyphs
[LAST_AREA
] - right
;
2863 /* Return the window in the window tree rooted in W containing frame
2864 row ROW. Value is null if none is found. */
2866 static struct window
*
2867 frame_row_to_window (struct window
*w
, int row
)
2869 struct window
*found
= NULL
;
2873 if (!NILP (w
->hchild
))
2874 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
2875 else if (!NILP (w
->vchild
))
2876 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
2877 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
2878 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
2881 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2888 /* Perform a line dance in the window tree rooted at W, after
2889 scrolling a frame matrix in mirrored_line_dance.
2891 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
2892 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
2893 COPY_FROM is a vector containing, for each row I in the range 0 <=
2894 I < NLINES, the index of the original line to move to I. This
2895 index is relative to the row range, i.e. 0 <= index < NLINES.
2896 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
2900 mirror_line_dance (struct window
*w
, int unchanged_at_top
, int nlines
, int *copy_from
, char *retained_p
)
2904 if (!NILP (w
->hchild
))
2905 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
2906 nlines
, copy_from
, retained_p
);
2907 else if (!NILP (w
->vchild
))
2908 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
2909 nlines
, copy_from
, retained_p
);
2912 /* W is a leaf window, and we are working on its current
2914 struct glyph_matrix
*m
= w
->current_matrix
;
2916 struct glyph_row
*old_rows
;
2918 /* Make a copy of the original rows of matrix m. */
2919 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
2920 memcpy (old_rows
, m
->rows
, m
->nrows
* sizeof *old_rows
);
2922 for (i
= 0; i
< nlines
; ++i
)
2924 /* Frame relative line assigned to. */
2925 int frame_to
= i
+ unchanged_at_top
;
2927 /* Frame relative line assigned. */
2928 int frame_from
= copy_from
[i
] + unchanged_at_top
;
2930 /* Window relative line assigned to. */
2931 int window_to
= frame_to
- m
->matrix_y
;
2933 /* Window relative line assigned. */
2934 int window_from
= frame_from
- m
->matrix_y
;
2936 /* Is assigned line inside window? */
2937 int from_inside_window_p
2938 = window_from
>= 0 && window_from
< m
->matrix_h
;
2940 /* Is assigned to line inside window? */
2941 int to_inside_window_p
2942 = window_to
>= 0 && window_to
< m
->matrix_h
;
2944 if (from_inside_window_p
&& to_inside_window_p
)
2946 /* Enabled setting before assignment. */
2947 int enabled_before_p
;
2949 /* Do the assignment. The enabled_p flag is saved
2950 over the assignment because the old redisplay did
2952 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
2953 m
->rows
[window_to
] = old_rows
[window_from
];
2954 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
2956 /* If frame line is empty, window line is empty, too. */
2957 if (!retained_p
[copy_from
[i
]])
2958 m
->rows
[window_to
].enabled_p
= 0;
2960 else if (to_inside_window_p
)
2962 /* A copy between windows. This is an infrequent
2963 case not worth optimizing. */
2964 struct frame
*f
= XFRAME (w
->frame
);
2965 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
2967 struct glyph_matrix
*m2
;
2970 w2
= frame_row_to_window (root
, frame_from
);
2971 /* ttn@surf.glug.org: when enabling menu bar using `emacs
2972 -nw', FROM_FRAME sometimes has no associated window.
2973 This check avoids a segfault if W2 is null. */
2976 m2
= w2
->current_matrix
;
2977 m2_from
= frame_from
- m2
->matrix_y
;
2978 copy_row_except_pointers (m
->rows
+ window_to
,
2979 m2
->rows
+ m2_from
);
2981 /* If frame line is empty, window line is empty, too. */
2982 if (!retained_p
[copy_from
[i
]])
2983 m
->rows
[window_to
].enabled_p
= 0;
2987 else if (from_inside_window_p
)
2991 /* If there was a copy between windows, make sure glyph
2992 pointers are in sync with the frame matrix. */
2994 sync_window_with_frame_matrix_rows (w
);
2996 /* Check that no pointers are lost. */
3000 /* Next window on same level. */
3001 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3008 /* Check that window and frame matrices agree about their
3009 understanding where glyphs of the rows are to find. For each
3010 window in the window tree rooted at W, check that rows in the
3011 matrices of leaf window agree with their frame matrices about
3015 check_window_matrix_pointers (struct window
*w
)
3019 if (!NILP (w
->hchild
))
3020 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3021 else if (!NILP (w
->vchild
))
3022 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3025 struct frame
*f
= XFRAME (w
->frame
);
3026 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3027 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3030 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3035 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3036 a window and FRAME_MATRIX is the corresponding frame matrix. For
3037 each row in WINDOW_MATRIX check that it's a slice of the
3038 corresponding frame row. If it isn't, abort. */
3041 check_matrix_pointers (struct glyph_matrix
*window_matrix
,
3042 struct glyph_matrix
*frame_matrix
)
3044 /* Row number in WINDOW_MATRIX. */
3047 /* Row number corresponding to I in FRAME_MATRIX. */
3048 int j
= window_matrix
->matrix_y
;
3050 /* For all rows check that the row in the window matrix is a
3051 slice of the row in the frame matrix. If it isn't we didn't
3052 mirror an operation on the frame matrix correctly. */
3053 while (i
< window_matrix
->nrows
)
3055 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3056 frame_matrix
->rows
+ j
))
3062 #endif /* GLYPH_DEBUG != 0 */
3066 /**********************************************************************
3067 VPOS and HPOS translations
3068 **********************************************************************/
3072 /* Translate vertical position VPOS which is relative to window W to a
3073 vertical position relative to W's frame. */
3076 window_to_frame_vpos (struct window
*w
, int vpos
)
3078 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3079 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3080 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3081 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (XFRAME (w
->frame
)));
3086 /* Translate horizontal position HPOS which is relative to window W to
3087 a horizontal position relative to W's frame. */
3090 window_to_frame_hpos (struct window
*w
, int hpos
)
3092 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3093 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3097 #endif /* GLYPH_DEBUG */
3101 /**********************************************************************
3103 **********************************************************************/
3105 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3106 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3111 CHECK_LIVE_FRAME (frame
);
3114 /* Ignore redraw requests, if frame has no glyphs yet.
3115 (Implementation note: It still has to be checked why we are
3116 called so early here). */
3117 if (!glyphs_initialized_initially_p
)
3122 if (FRAME_MSDOS_P (f
))
3123 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3126 clear_current_matrices (f
);
3128 if (FRAME_TERMCAP_P (f
))
3129 fflush (FRAME_TTY (f
)->output
);
3130 windows_or_buffers_changed
++;
3131 /* Mark all windows as inaccurate, so that every window will have
3132 its redisplay done. */
3133 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3134 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3140 /* Redraw frame F. This is nothing more than a call to the Lisp
3141 function redraw-frame. */
3144 redraw_frame (struct frame
*f
)
3147 XSETFRAME (frame
, f
);
3148 Fredraw_frame (frame
);
3152 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3153 doc
: /* Clear and redisplay all visible frames. */)
3156 Lisp_Object tail
, frame
;
3158 FOR_EACH_FRAME (tail
, frame
)
3159 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3160 Fredraw_frame (frame
);
3167 /***********************************************************************
3169 ***********************************************************************/
3171 /* Update frame F based on the data in desired matrices.
3173 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3174 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3177 Value is non-zero if redisplay was stopped due to pending input. */
3180 update_frame (struct frame
*f
, int force_p
, int inhibit_hairy_id_p
)
3182 /* 1 means display has been paused because of pending input. */
3184 struct window
*root_window
= XWINDOW (f
->root_window
);
3186 if (redisplay_dont_pause
)
3188 #if PERIODIC_PREEMPTION_CHECKING
3189 else if (NILP (Vredisplay_preemption_period
))
3191 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3194 double p
= XFLOATINT (Vredisplay_preemption_period
);
3197 if (detect_input_pending_ignore_squeezables ())
3204 usec
= (p
- sec
) * 1000000;
3206 EMACS_GET_TIME (tm
);
3207 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3208 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3212 if (FRAME_WINDOW_P (f
))
3214 /* We are working on window matrix basis. All windows whose
3215 flag must_be_updated_p is set have to be updated. */
3217 /* Record that we are not working on frame matrices. */
3218 set_frame_matrix_frame (NULL
);
3220 /* Update all windows in the window tree of F, maybe stopping
3221 when pending input is detected. */
3224 /* Update the menu bar on X frames that don't have toolkit
3226 if (WINDOWP (f
->menu_bar_window
))
3227 update_window (XWINDOW (f
->menu_bar_window
), 1);
3229 /* Update the tool-bar window, if present. */
3230 if (WINDOWP (f
->tool_bar_window
))
3232 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3234 /* Update tool-bar window. */
3235 if (w
->must_be_updated_p
)
3239 update_window (w
, 1);
3240 w
->must_be_updated_p
= 0;
3242 /* Swap tool-bar strings. We swap because we want to
3244 tem
= f
->current_tool_bar_string
;
3245 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3246 f
->desired_tool_bar_string
= tem
;
3251 /* Update windows. */
3252 paused_p
= update_window_tree (root_window
, force_p
);
3255 /* This flush is a performance bottleneck under X,
3256 and it doesn't seem to be necessary anyway (in general).
3257 It is necessary when resizing the window with the mouse, or
3258 at least the fringes are not redrawn in a timely manner. ++kfs */
3259 if (f
->force_flush_display_p
)
3261 FRAME_RIF (f
)->flush_display (f
);
3262 f
->force_flush_display_p
= 0;
3267 /* We are working on frame matrix basis. Set the frame on whose
3268 frame matrix we operate. */
3269 set_frame_matrix_frame (f
);
3271 /* Build F's desired matrix from window matrices. */
3272 build_frame_matrix (f
);
3274 /* Update the display */
3276 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3279 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3281 if (FRAME_TTY (f
)->termscript
)
3282 fflush (FRAME_TTY (f
)->termscript
);
3283 if (FRAME_TERMCAP_P (f
))
3284 fflush (FRAME_TTY (f
)->output
);
3287 /* Check window matrices for lost pointers. */
3289 check_window_matrix_pointers (root_window
);
3290 add_frame_display_history (f
, paused_p
);
3294 #if PERIODIC_PREEMPTION_CHECKING
3297 /* Reset flags indicating that a window should be updated. */
3298 set_window_update_flags (root_window
, 0);
3300 display_completed
= !paused_p
;
3306 /************************************************************************
3307 Window-based updates
3308 ************************************************************************/
3310 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3311 don't stop updating when input is pending. */
3314 update_window_tree (struct window
*w
, int force_p
)
3318 while (w
&& !paused_p
)
3320 if (!NILP (w
->hchild
))
3321 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3322 else if (!NILP (w
->vchild
))
3323 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3324 else if (w
->must_be_updated_p
)
3325 paused_p
|= update_window (w
, force_p
);
3327 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3334 /* Update window W if its flag must_be_updated_p is non-zero. If
3335 FORCE_P is non-zero, don't stop updating if input is pending. */
3338 update_single_window (struct window
*w
, int force_p
)
3340 if (w
->must_be_updated_p
)
3342 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3344 /* Record that this is not a frame-based redisplay. */
3345 set_frame_matrix_frame (NULL
);
3347 if (redisplay_dont_pause
)
3349 #if PERIODIC_PREEMPTION_CHECKING
3350 else if (NILP (Vredisplay_preemption_period
))
3352 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3355 double p
= XFLOATINT (Vredisplay_preemption_period
);
3359 usec
= (p
- sec
) * 1000000;
3361 EMACS_GET_TIME (tm
);
3362 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3363 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3369 update_window (w
, force_p
);
3372 /* Reset flag in W. */
3373 w
->must_be_updated_p
= 0;
3377 #ifdef HAVE_WINDOW_SYSTEM
3379 /* Redraw lines from the current matrix of window W that are
3380 overlapped by other rows. YB is bottom-most y-position in W. */
3383 redraw_overlapped_rows (struct window
*w
, int yb
)
3386 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3388 /* If rows overlapping others have been changed, the rows being
3389 overlapped have to be redrawn. This won't draw lines that have
3390 already been drawn in update_window_line because overlapped_p in
3391 desired rows is 0, so after row assignment overlapped_p in
3392 current rows is 0. */
3393 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3395 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3397 if (!row
->enabled_p
)
3399 else if (row
->mode_line_p
)
3402 if (row
->overlapped_p
)
3404 enum glyph_row_area area
;
3406 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3409 updated_area
= area
;
3410 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3411 area
== TEXT_AREA
? row
->x
: 0);
3412 if (row
->used
[area
])
3413 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3415 FRAME_RIF (f
)->clear_end_of_line (-1);
3418 row
->overlapped_p
= 0;
3421 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3427 /* Redraw lines from the current matrix of window W that overlap
3428 others. YB is bottom-most y-position in W. */
3431 redraw_overlapping_rows (struct window
*w
, int yb
)
3434 struct glyph_row
*row
;
3435 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3437 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3439 row
= w
->current_matrix
->rows
+ i
;
3441 if (!row
->enabled_p
)
3443 else if (row
->mode_line_p
)
3446 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3448 if (row
->overlapping_p
)
3452 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
3453 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
3454 overlaps
|= OVERLAPS_PRED
;
3455 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
3456 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
3457 overlaps
|= OVERLAPS_SUCC
;
3461 if (row
->used
[LEFT_MARGIN_AREA
])
3462 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
3464 if (row
->used
[TEXT_AREA
])
3465 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
3467 if (row
->used
[RIGHT_MARGIN_AREA
])
3468 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
3470 /* Record in neighbour rows that ROW overwrites part of
3472 if (overlaps
& OVERLAPS_PRED
)
3473 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3474 if (overlaps
& OVERLAPS_SUCC
)
3475 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3484 #endif /* HAVE_WINDOW_SYSTEM */
3487 #if defined GLYPH_DEBUG && 0
3489 /* Check that no row in the current matrix of window W is enabled
3490 which is below what's displayed in the window. */
3493 check_current_matrix_flags (struct window
*w
)
3495 int last_seen_p
= 0;
3496 int i
, yb
= window_text_bottom_y (w
);
3498 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
3500 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
3501 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3503 else if (last_seen_p
&& row
->enabled_p
)
3508 #endif /* GLYPH_DEBUG */
3511 /* Update display of window W. FORCE_P non-zero means that we should
3512 not stop when detecting pending input. */
3515 update_window (struct window
*w
, int force_p
)
3517 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3519 #if !PERIODIC_PREEMPTION_CHECKING
3520 int preempt_count
= baud_rate
/ 2400 + 1;
3522 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3524 /* Check that W's frame doesn't have glyph matrices. */
3525 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
3528 /* Check pending input the first time so that we can quickly return. */
3529 #if !PERIODIC_PREEMPTION_CHECKING
3531 detect_input_pending_ignore_squeezables ();
3534 /* If forced to complete the update, or if no input is pending, do
3536 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
3538 struct glyph_row
*row
, *end
;
3539 struct glyph_row
*mode_line_row
;
3540 struct glyph_row
*header_line_row
;
3541 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0;
3542 #if ! PERIODIC_PREEMPTION_CHECKING
3546 rif
->update_window_begin_hook (w
);
3547 yb
= window_text_bottom_y (w
);
3549 /* If window has a header line, update it before everything else.
3550 Adjust y-positions of other rows by the header line height. */
3551 row
= desired_matrix
->rows
;
3552 end
= row
+ desired_matrix
->nrows
- 1;
3554 if (row
->mode_line_p
)
3556 header_line_row
= row
;
3560 header_line_row
= NULL
;
3562 /* Update the mode line, if necessary. */
3563 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3564 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3566 mode_line_row
->y
= yb
;
3567 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3569 &mouse_face_overwritten_p
);
3572 /* Find first enabled row. Optimizations in redisplay_internal
3573 may lead to an update with only one row enabled. There may
3574 be also completely empty matrices. */
3575 while (row
< end
&& !row
->enabled_p
)
3578 /* Try reusing part of the display by copying. */
3579 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
3581 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
3584 /* All rows were found to be equal. */
3590 /* We've scrolled the display. */
3596 /* Update the rest of the lines. */
3597 for (; row
< end
&& (force_p
|| !input_pending
); ++row
)
3600 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
3603 /* We'll have to play a little bit with when to
3604 detect_input_pending. If it's done too often,
3605 scrolling large windows with repeated scroll-up
3606 commands will too quickly pause redisplay. */
3607 #if PERIODIC_PREEMPTION_CHECKING
3611 EMACS_GET_TIME (tm
);
3612 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
3613 if (EMACS_TIME_NEG_P (dif
))
3615 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3616 if (detect_input_pending_ignore_squeezables ())
3621 if (!force_p
&& ++n_updated
% preempt_count
== 0)
3622 detect_input_pending_ignore_squeezables ();
3624 changed_p
|= update_window_line (w
, vpos
,
3625 &mouse_face_overwritten_p
);
3627 /* Mark all rows below the last visible one in the current
3628 matrix as invalid. This is necessary because of
3629 variable line heights. Consider the case of three
3630 successive redisplays, where the first displays 5
3631 lines, the second 3 lines, and the third 5 lines again.
3632 If the second redisplay wouldn't mark rows in the
3633 current matrix invalid, the third redisplay might be
3634 tempted to optimize redisplay based on lines displayed
3635 in the first redisplay. */
3636 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3637 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
3638 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
3641 /* Was display preempted? */
3642 paused_p
= row
< end
;
3646 /* Update the header line after scrolling because a new header
3647 line would otherwise overwrite lines at the top of the window
3648 that can be scrolled. */
3649 if (header_line_row
&& header_line_row
->enabled_p
)
3651 header_line_row
->y
= 0;
3652 update_window_line (w
, 0, &mouse_face_overwritten_p
);
3655 /* Fix the appearance of overlapping/overlapped rows. */
3656 if (!paused_p
&& !w
->pseudo_window_p
)
3658 #ifdef HAVE_WINDOW_SYSTEM
3659 if (changed_p
&& rif
->fix_overlapping_area
)
3661 redraw_overlapped_rows (w
, yb
);
3662 redraw_overlapping_rows (w
, yb
);
3666 /* Make cursor visible at cursor position of W. */
3667 set_window_cursor_after_update (w
);
3669 #if 0 /* Check that current matrix invariants are satisfied. This is
3670 for debugging only. See the comment of check_matrix_invariants. */
3671 IF_DEBUG (check_matrix_invariants (w
));
3676 /* Remember the redisplay method used to display the matrix. */
3677 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
3680 #ifdef HAVE_WINDOW_SYSTEM
3681 update_window_fringes (w
, 0);
3684 /* End the update of window W. Don't set the cursor if we
3685 paused updating the display because in this case,
3686 set_window_cursor_after_update hasn't been called, and
3687 output_cursor doesn't contain the cursor location. */
3688 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
3694 /* check_current_matrix_flags (w); */
3695 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
3698 clear_glyph_matrix (desired_matrix
);
3704 /* Update the display of area AREA in window W, row number VPOS.
3705 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
3708 update_marginal_area (struct window
*w
, int area
, int vpos
)
3710 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3711 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3713 /* Let functions in xterm.c know what area subsequent X positions
3714 will be relative to. */
3715 updated_area
= area
;
3717 /* Set cursor to start of glyphs, write them, and clear to the end
3718 of the area. I don't think that something more sophisticated is
3719 necessary here, since marginal areas will not be the default. */
3720 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
3721 if (desired_row
->used
[area
])
3722 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
3723 rif
->clear_end_of_line (-1);
3727 /* Update the display of the text area of row VPOS in window W.
3728 Value is non-zero if display has changed. */
3731 update_text_area (struct window
*w
, int vpos
)
3733 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
3734 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3735 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3738 /* Let functions in xterm.c know what area subsequent X positions
3739 will be relative to. */
3740 updated_area
= TEXT_AREA
;
3742 /* If rows are at different X or Y, or rows have different height,
3743 or the current row is marked invalid, write the entire line. */
3744 if (!current_row
->enabled_p
3745 || desired_row
->y
!= current_row
->y
3746 || desired_row
->ascent
!= current_row
->ascent
3747 || desired_row
->phys_ascent
!= current_row
->phys_ascent
3748 || desired_row
->phys_height
!= current_row
->phys_height
3749 || desired_row
->visible_height
!= current_row
->visible_height
3750 || current_row
->overlapped_p
3751 /* This next line is necessary for correctly redrawing
3752 mouse-face areas after scrolling and other operations.
3753 However, it causes excessive flickering when mouse is moved
3754 across the mode line. Luckily, turning it off for the mode
3755 line doesn't seem to hurt anything. -- cyd.
3756 But it is still needed for the header line. -- kfs. */
3757 || (current_row
->mouse_face_p
3758 && !(current_row
->mode_line_p
&& vpos
> 0))
3759 || current_row
->x
!= desired_row
->x
)
3761 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
3763 if (desired_row
->used
[TEXT_AREA
])
3764 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
3765 desired_row
->used
[TEXT_AREA
]);
3767 /* Clear to end of window. */
3768 rif
->clear_end_of_line (-1);
3771 /* This erases the cursor. We do this here because
3772 notice_overwritten_cursor cannot easily check this, which
3773 might indicate that the whole functionality of
3774 notice_overwritten_cursor would better be implemented here.
3775 On the other hand, we need notice_overwritten_cursor as long
3776 as mouse highlighting is done asynchronously outside of
3778 if (vpos
== w
->phys_cursor
.vpos
)
3779 w
->phys_cursor_on_p
= 0;
3784 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
3785 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
3786 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
3787 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
3788 int abort_skipping
= 0;
3790 /* If the desired row extends its face to the text area end, and
3791 unless the current row also does so at the same position,
3792 make sure we write at least one glyph, so that the face
3793 extension actually takes place. */
3794 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
3795 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
3796 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
3797 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
3800 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
3804 /* Loop over glyphs that current and desired row may have
3808 int can_skip_p
= !abort_skipping
;
3810 /* Skip over glyphs that both rows have in common. These
3811 don't have to be written. We can't skip if the last
3812 current glyph overlaps the glyph to its right. For
3813 example, consider a current row of `if ' with the `f' in
3814 Courier bold so that it overlaps the ` ' to its right.
3815 If the desired row is ` ', we would skip over the space
3816 after the `if' and there would remain a pixel from the
3817 `f' on the screen. */
3818 if (overlapping_glyphs_p
&& i
> 0)
3820 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
3823 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
3825 can_skip_p
= (right
== 0 && !abort_skipping
);
3833 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
3835 x
+= desired_glyph
->pixel_width
;
3836 ++desired_glyph
, ++current_glyph
, ++i
;
3839 /* Consider the case that the current row contains "xxx
3840 ppp ggg" in italic Courier font, and the desired row
3841 is "xxx ggg". The character `p' has lbearing, `g'
3842 has not. The loop above will stop in front of the
3843 first `p' in the current row. If we would start
3844 writing glyphs there, we wouldn't erase the lbearing
3845 of the `p'. The rest of the lbearing problem is then
3846 taken care of by draw_glyphs. */
3847 if (overlapping_glyphs_p
3849 && i
< current_row
->used
[TEXT_AREA
]
3850 && (current_row
->used
[TEXT_AREA
]
3851 != desired_row
->used
[TEXT_AREA
]))
3855 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
3857 while (left
> 0 && i
> 0)
3859 --i
, --desired_glyph
, --current_glyph
;
3860 x
-= desired_glyph
->pixel_width
;
3861 left
-= desired_glyph
->pixel_width
;
3864 /* Abort the skipping algorithm if we end up before
3865 our starting point, to avoid looping (bug#1070).
3866 This can happen when the lbearing is larger than
3868 abort_skipping
= (i
< start_hpos
);
3872 /* Try to avoid writing the entire rest of the desired row
3873 by looking for a resync point. This mainly prevents
3874 mode line flickering in the case the mode line is in
3875 fixed-pitch font, which it usually will be. */
3876 if (i
< desired_row
->used
[TEXT_AREA
])
3878 int start_x
= x
, start_hpos
= i
;
3879 struct glyph
*start
= desired_glyph
;
3881 int skip_first_p
= !can_skip_p
;
3883 /* Find the next glyph that's equal again. */
3886 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
3889 x
+= desired_glyph
->pixel_width
;
3890 current_x
+= current_glyph
->pixel_width
;
3891 ++desired_glyph
, ++current_glyph
, ++i
;
3895 if (i
== start_hpos
|| x
!= current_x
)
3899 desired_glyph
= start
;
3903 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
3904 rif
->write_glyphs (start
, i
- start_hpos
);
3909 /* Write the rest. */
3910 if (i
< desired_row
->used
[TEXT_AREA
])
3912 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
3913 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
3917 /* Maybe clear to end of line. */
3918 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
3920 /* If new row extends to the end of the text area, nothing
3921 has to be cleared, if and only if we did a write_glyphs
3922 above. This is made sure by setting desired_stop_pos
3923 appropriately above. */
3924 xassert (i
< desired_row
->used
[TEXT_AREA
]
3925 || ((desired_row
->used
[TEXT_AREA
]
3926 == current_row
->used
[TEXT_AREA
])
3927 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
3929 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
3931 /* If old row extends to the end of the text area, clear. */
3932 if (i
>= desired_row
->used
[TEXT_AREA
])
3933 rif
->cursor_to (vpos
, i
, desired_row
->y
,
3934 desired_row
->pixel_width
);
3935 rif
->clear_end_of_line (-1);
3938 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
3940 /* Otherwise clear to the end of the old row. Everything
3941 after that position should be clear already. */
3944 if (i
>= desired_row
->used
[TEXT_AREA
])
3945 rif
->cursor_to (vpos
, i
, desired_row
->y
,
3946 desired_row
->pixel_width
);
3948 /* If cursor is displayed at the end of the line, make sure
3949 it's cleared. Nowadays we don't have a phys_cursor_glyph
3950 with which to erase the cursor (because this method
3951 doesn't work with lbearing/rbearing), so we must do it
3953 if (vpos
== w
->phys_cursor
.vpos
3954 && (desired_row
->reversed_p
3955 ? (w
->phys_cursor
.hpos
< 0)
3956 : (w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])))
3958 w
->phys_cursor_on_p
= 0;
3962 xlim
= current_row
->pixel_width
;
3963 rif
->clear_end_of_line (xlim
);
3972 /* Update row VPOS in window W. Value is non-zero if display has been
3976 update_window_line (struct window
*w
, int vpos
, int *mouse_face_overwritten_p
)
3978 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
3979 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3980 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3983 /* Set the row being updated. This is important to let xterm.c
3984 know what line height values are in effect. */
3985 updated_row
= desired_row
;
3987 /* A row can be completely invisible in case a desired matrix was
3988 built with a vscroll and then make_cursor_line_fully_visible shifts
3989 the matrix. Make sure to make such rows current anyway, since
3990 we need the correct y-position, for example, in the current matrix. */
3991 if (desired_row
->mode_line_p
3992 || desired_row
->visible_height
> 0)
3994 xassert (desired_row
->enabled_p
);
3996 /* Update display of the left margin area, if there is one. */
3997 if (!desired_row
->full_width_p
3998 && !NILP (w
->left_margin_cols
))
4001 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4004 /* Update the display of the text area. */
4005 if (update_text_area (w
, vpos
))
4008 if (current_row
->mouse_face_p
)
4009 *mouse_face_overwritten_p
= 1;
4012 /* Update display of the right margin area, if there is one. */
4013 if (!desired_row
->full_width_p
4014 && !NILP (w
->right_margin_cols
))
4017 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4020 /* Draw truncation marks etc. */
4021 if (!current_row
->enabled_p
4022 || desired_row
->y
!= current_row
->y
4023 || desired_row
->visible_height
!= current_row
->visible_height
4024 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4025 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4026 || current_row
->redraw_fringe_bitmaps_p
4027 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4028 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4029 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4030 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4031 rif
->after_update_window_line_hook (desired_row
);
4034 /* Update current_row from desired_row. */
4035 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4041 /* Set the cursor after an update of window W. This function may only
4042 be called from update_window. */
4045 set_window_cursor_after_update (struct window
*w
)
4047 struct frame
*f
= XFRAME (w
->frame
);
4048 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4049 int cx
, cy
, vpos
, hpos
;
4051 /* Not intended for frame matrix updates. */
4052 xassert (FRAME_WINDOW_P (f
));
4054 if (cursor_in_echo_area
4055 && !NILP (echo_area_buffer
[0])
4056 /* If we are showing a message instead of the mini-buffer,
4057 show the cursor for the message instead. */
4058 && XWINDOW (minibuf_window
) == w
4059 && EQ (minibuf_window
, echo_area_window
)
4060 /* These cases apply only to the frame that contains
4061 the active mini-buffer window. */
4062 && FRAME_HAS_MINIBUF_P (f
)
4063 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4065 cx
= cy
= vpos
= hpos
= 0;
4067 if (cursor_in_echo_area
>= 0)
4069 /* If the mini-buffer is several lines high, find the last
4070 line that has any text on it. Note: either all lines
4071 are enabled or none. Otherwise we wouldn't be able to
4073 struct glyph_row
*row
, *last_row
;
4074 struct glyph
*glyph
;
4075 int yb
= window_text_bottom_y (w
);
4078 row
= w
->current_matrix
->rows
;
4079 while (row
->enabled_p
4080 && (last_row
== NULL
4081 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4083 if (row
->used
[TEXT_AREA
]
4084 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4091 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4092 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4094 while (last
> start
&& last
->charpos
< 0)
4097 for (glyph
= start
; glyph
< last
; ++glyph
)
4099 cx
+= glyph
->pixel_width
;
4104 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4112 hpos
= w
->cursor
.hpos
;
4113 vpos
= w
->cursor
.vpos
;
4116 /* Window cursor can be out of sync for horizontally split windows. */
4117 hpos
= max (-1, hpos
); /* -1 is for when cursor is on the left fringe */
4118 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4119 vpos
= max (0, vpos
);
4120 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4121 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4125 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4126 tree rooted at W. */
4129 set_window_update_flags (struct window
*w
, int on_p
)
4133 if (!NILP (w
->hchild
))
4134 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4135 else if (!NILP (w
->vchild
))
4136 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4138 w
->must_be_updated_p
= on_p
;
4140 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4146 /***********************************************************************
4147 Window-Based Scrolling
4148 ***********************************************************************/
4150 /* Structure describing rows in scrolling_window. */
4154 /* Number of occurrences of this row in desired and current matrix. */
4155 int old_uses
, new_uses
;
4157 /* Vpos of row in new matrix. */
4158 int new_line_number
;
4160 /* Bucket index of this row_entry in the hash table row_table. */
4163 /* The row described by this entry. */
4164 struct glyph_row
*row
;
4166 /* Hash collision chain. */
4167 struct row_entry
*next
;
4170 /* A pool to allocate row_entry structures from, and the size of the
4171 pool. The pool is reallocated in scrolling_window when we find
4172 that we need a larger one. */
4174 static struct row_entry
*row_entry_pool
;
4175 static ptrdiff_t row_entry_pool_size
;
4177 /* Index of next free entry in row_entry_pool. */
4179 static ptrdiff_t row_entry_idx
;
4181 /* The hash table used during scrolling, and the table's size. This
4182 table is used to quickly identify equal rows in the desired and
4185 static struct row_entry
**row_table
;
4186 static ptrdiff_t row_table_size
;
4188 /* Vectors of pointers to row_entry structures belonging to the
4189 current and desired matrix, and the size of the vectors. */
4191 static struct row_entry
**old_lines
, **new_lines
;
4192 static ptrdiff_t old_lines_size
, new_lines_size
;
4194 /* A pool to allocate run structures from, and its size. */
4196 static struct run
*run_pool
;
4197 static ptrdiff_t runs_size
;
4199 /* A vector of runs of lines found during scrolling. */
4201 static struct run
**runs
;
4203 /* Add glyph row ROW to the scrolling hash table. */
4205 static inline struct row_entry
*
4206 add_row_entry (struct glyph_row
*row
)
4208 struct row_entry
*entry
;
4209 ptrdiff_t i
= row
->hash
% row_table_size
;
4211 entry
= row_table
[i
];
4212 while (entry
&& !row_equal_p (entry
->row
, row
, 1))
4213 entry
= entry
->next
;
4217 entry
= row_entry_pool
+ row_entry_idx
++;
4219 entry
->old_uses
= entry
->new_uses
= 0;
4220 entry
->new_line_number
= 0;
4222 entry
->next
= row_table
[i
];
4223 row_table
[i
] = entry
;
4230 /* Try to reuse part of the current display of W by scrolling lines.
4231 HEADER_LINE_P non-zero means W has a header line.
4233 The algorithm is taken from Communications of the ACM, Apr78 "A
4234 Technique for Isolating Differences Between Files." It should take
4237 A short outline of the steps of the algorithm
4239 1. Skip lines equal at the start and end of both matrices.
4241 2. Enter rows in the current and desired matrix into a symbol
4242 table, counting how often they appear in both matrices.
4244 3. Rows that appear exactly once in both matrices serve as anchors,
4245 i.e. we assume that such lines are likely to have been moved.
4247 4. Starting from anchor lines, extend regions to be scrolled both
4248 forward and backward.
4252 -1 if all rows were found to be equal.
4253 0 to indicate that we did not scroll the display, or
4254 1 if we did scroll. */
4257 scrolling_window (struct window
*w
, int header_line_p
)
4259 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4260 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4261 int yb
= window_text_bottom_y (w
);
4263 int j
, first_old
, first_new
, last_old
, last_new
;
4266 struct row_entry
*entry
;
4267 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4269 /* Skip over rows equal at the start. */
4270 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4272 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4273 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4277 && !d
->redraw_fringe_bitmaps_p
4279 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4280 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4281 && row_equal_p (c
, d
, 1))
4290 /* Give up if some rows in the desired matrix are not enabled. */
4291 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4294 first_old
= first_new
= i
;
4296 /* Set last_new to the index + 1 of the row that reaches the
4297 bottom boundary in the desired matrix. Give up if we find a
4298 disabled row before we reach the bottom boundary. */
4300 while (i
< desired_matrix
->nrows
- 1)
4304 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4306 bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
));
4315 /* Set last_old to the index + 1 of the row that reaches the bottom
4316 boundary in the current matrix. We don't look at the enabled
4317 flag here because we plan to reuse part of the display even if
4318 other parts are disabled. */
4320 while (i
< current_matrix
->nrows
- 1)
4322 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4331 /* Skip over rows equal at the bottom. */
4334 while (i
- 1 > first_new
4335 && j
- 1 > first_old
4336 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4337 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4338 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4339 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4340 && row_equal_p (MATRIX_ROW (desired_matrix
, i
- 1),
4341 MATRIX_ROW (current_matrix
, j
- 1), 1))
4346 /* Nothing to do if all rows are equal. */
4347 if (last_new
== first_new
)
4350 /* Check for integer overflow in size calculation.
4352 If next_almost_prime checks (N) for divisibility by 2..10, then
4353 it can return at most N + 10, e.g., next_almost_prime (1) == 11.
4354 So, set next_almost_prime_increment_max to 10.
4356 It's just a coincidence that next_almost_prime_increment_max ==
4357 NEXT_ALMOST_PRIME_LIMIT - 1. If NEXT_ALMOST_PRIME_LIMIT were
4358 13, then next_almost_prime_increment_max would be 14, e.g.,
4359 because next_almost_prime (113) would be 127. */
4361 verify (NEXT_ALMOST_PRIME_LIMIT
== 11);
4362 enum { next_almost_prime_increment_max
= 10 };
4363 ptrdiff_t row_table_max
=
4364 (min (PTRDIFF_MAX
, SIZE_MAX
) / (3 * sizeof *row_table
)
4365 - next_almost_prime_increment_max
);
4366 ptrdiff_t current_nrows_max
= row_table_max
- desired_matrix
->nrows
;
4367 if (current_nrows_max
< current_matrix
->nrows
)
4368 memory_full (SIZE_MAX
);
4371 /* Reallocate vectors, tables etc. if necessary. */
4373 if (current_matrix
->nrows
> old_lines_size
)
4374 old_lines
= xpalloc (old_lines
, &old_lines_size
,
4375 current_matrix
->nrows
- old_lines_size
,
4376 INT_MAX
, sizeof *old_lines
);
4378 if (desired_matrix
->nrows
> new_lines_size
)
4379 new_lines
= xpalloc (new_lines
, &new_lines_size
,
4380 desired_matrix
->nrows
- new_lines_size
,
4381 INT_MAX
, sizeof *new_lines
);
4383 n
= desired_matrix
->nrows
;
4384 n
+= current_matrix
->nrows
;
4385 if (row_table_size
< 3 * n
)
4387 ptrdiff_t size
= next_almost_prime (3 * n
);
4388 row_table
= xnrealloc (row_table
, size
, sizeof *row_table
);
4389 row_table_size
= size
;
4390 memset (row_table
, 0, size
* sizeof *row_table
);
4393 if (n
> row_entry_pool_size
)
4394 row_entry_pool
= xpalloc (row_entry_pool
, &row_entry_pool_size
,
4395 n
- row_entry_pool_size
,
4396 -1, sizeof *row_entry_pool
);
4398 if (desired_matrix
->nrows
> runs_size
)
4400 runs
= xnrealloc (runs
, desired_matrix
->nrows
, sizeof *runs
);
4401 run_pool
= xnrealloc (run_pool
, desired_matrix
->nrows
, sizeof *run_pool
);
4402 runs_size
= desired_matrix
->nrows
;
4405 nruns
= run_idx
= 0;
4408 /* Add rows from the current and desired matrix to the hash table
4409 row_hash_table to be able to find equal ones quickly. */
4411 for (i
= first_old
; i
< last_old
; ++i
)
4413 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4415 entry
= add_row_entry (MATRIX_ROW (current_matrix
, i
));
4416 old_lines
[i
] = entry
;
4420 old_lines
[i
] = NULL
;
4423 for (i
= first_new
; i
< last_new
; ++i
)
4425 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4426 entry
= add_row_entry (MATRIX_ROW (desired_matrix
, i
));
4428 entry
->new_line_number
= i
;
4429 new_lines
[i
] = entry
;
4432 /* Identify moves based on lines that are unique and equal
4433 in both matrices. */
4434 for (i
= first_old
; i
< last_old
;)
4436 && old_lines
[i
]->old_uses
== 1
4437 && old_lines
[i
]->new_uses
== 1)
4440 int new_line
= old_lines
[i
]->new_line_number
;
4441 struct run
*run
= run_pool
+ run_idx
++;
4444 run
->current_vpos
= i
;
4445 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4446 run
->desired_vpos
= new_line
;
4447 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4449 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4451 /* Extend backward. */
4454 while (p
> first_old
4456 && old_lines
[p
] == new_lines
[q
])
4458 int h
= MATRIX_ROW (current_matrix
, p
)->height
;
4459 --run
->current_vpos
;
4460 --run
->desired_vpos
;
4463 run
->desired_y
-= h
;
4464 run
->current_y
-= h
;
4468 /* Extend forward. */
4473 && old_lines
[p
] == new_lines
[q
])
4475 int h
= MATRIX_ROW (current_matrix
, p
)->height
;
4481 /* Insert run into list of all runs. Order runs by copied
4482 pixel lines. Note that we record runs that don't have to
4483 be copied because they are already in place. This is done
4484 because we can avoid calling update_window_line in this
4486 for (p
= 0; p
< nruns
&& runs
[p
]->height
> run
->height
; ++p
)
4488 for (q
= nruns
; q
> p
; --q
)
4489 runs
[q
] = runs
[q
- 1];
4498 /* Do the moves. Do it in a way that we don't overwrite something
4499 we want to copy later on. This is not solvable in general
4500 because there is only one display and we don't have a way to
4501 exchange areas on this display. Example:
4503 +-----------+ +-----------+
4505 +-----------+ --> +-----------+
4507 +-----------+ +-----------+
4509 Instead, prefer bigger moves, and invalidate moves that would
4510 copy from where we copied to. */
4512 for (i
= 0; i
< nruns
; ++i
)
4513 if (runs
[i
]->nrows
> 0)
4515 struct run
*r
= runs
[i
];
4517 /* Copy on the display. */
4518 if (r
->current_y
!= r
->desired_y
)
4520 rif
->clear_window_mouse_face (w
);
4521 rif
->scroll_run_hook (w
, r
);
4523 /* Invalidate runs that copy from where we copied to. */
4524 for (j
= i
+ 1; j
< nruns
; ++j
)
4526 struct run
*p
= runs
[j
];
4528 if ((p
->current_y
>= r
->desired_y
4529 && p
->current_y
< r
->desired_y
+ r
->height
)
4530 || (p
->current_y
+ p
->height
>= r
->desired_y
4531 && (p
->current_y
+ p
->height
4532 < r
->desired_y
+ r
->height
)))
4537 /* Assign matrix rows. */
4538 for (j
= 0; j
< r
->nrows
; ++j
)
4540 struct glyph_row
*from
, *to
;
4541 int to_overlapped_p
;
4543 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4544 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4545 to_overlapped_p
= to
->overlapped_p
;
4546 from
->redraw_fringe_bitmaps_p
= from
->fringe_bitmap_periodic_p
;
4547 assign_row (to
, from
);
4548 to
->enabled_p
= 1, from
->enabled_p
= 0;
4549 to
->overlapped_p
= to_overlapped_p
;
4553 /* Clear the hash table, for the next time. */
4554 for (i
= 0; i
< row_entry_idx
; ++i
)
4555 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4557 /* Value is 1 to indicate that we scrolled the display. */
4563 /************************************************************************
4565 ************************************************************************/
4567 /* Update the desired frame matrix of frame F.
4569 FORCE_P non-zero means that the update should not be stopped by
4570 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4571 should not be tried.
4573 Value is non-zero if update was stopped due to pending input. */
4576 update_frame_1 (struct frame
*f
, int force_p
, int inhibit_id_p
)
4578 /* Frame matrices to work on. */
4579 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4580 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4583 int preempt_count
= baud_rate
/ 2400 + 1;
4585 xassert (current_matrix
&& desired_matrix
);
4587 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4588 calculate_costs (f
);
4590 if (preempt_count
<= 0)
4593 #if !PERIODIC_PREEMPTION_CHECKING
4594 if (!force_p
&& detect_input_pending_ignore_squeezables ())
4601 /* If we cannot insert/delete lines, it's no use trying it. */
4602 if (!FRAME_LINE_INS_DEL_OK (f
))
4605 /* See if any of the desired lines are enabled; don't compute for
4606 i/d line if just want cursor motion. */
4607 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4608 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4611 /* Try doing i/d line, if not yet inhibited. */
4612 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4613 force_p
|= scrolling (f
);
4615 /* Update the individual lines as needed. Do bottom line first. */
4616 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4617 update_frame_line (f
, desired_matrix
->nrows
- 1);
4619 /* Now update the rest of the lines. */
4620 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4622 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4624 if (FRAME_TERMCAP_P (f
))
4626 /* Flush out every so many lines.
4627 Also flush out if likely to have more than 1k buffered
4628 otherwise. I'm told that some telnet connections get
4629 really screwed by more than 1k output at once. */
4630 FILE *display_output
= FRAME_TTY (f
)->output
;
4633 int outq
= PENDING_OUTPUT_COUNT (display_output
);
4635 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4637 fflush (display_output
);
4638 if (preempt_count
== 1)
4640 #ifdef EMACS_OUTQSIZE
4641 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4642 /* Probably not a tty. Ignore the error and reset
4644 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
4647 if (baud_rate
<= outq
&& baud_rate
> 0)
4648 sleep (outq
/ baud_rate
);
4654 #if PERIODIC_PREEMPTION_CHECKING
4658 EMACS_GET_TIME (tm
);
4659 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4660 if (EMACS_TIME_NEG_P (dif
))
4662 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4663 if (detect_input_pending_ignore_squeezables ())
4668 if (!force_p
&& (i
- 1) % preempt_count
== 0)
4669 detect_input_pending_ignore_squeezables ();
4672 update_frame_line (f
, i
);
4676 pause_p
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
4678 /* Now just clean up termcap drivers and set cursor, etc. */
4681 if ((cursor_in_echo_area
4682 /* If we are showing a message instead of the mini-buffer,
4683 show the cursor for the message instead of for the
4684 (now hidden) mini-buffer contents. */
4685 || (EQ (minibuf_window
, selected_window
)
4686 && EQ (minibuf_window
, echo_area_window
)
4687 && !NILP (echo_area_buffer
[0])))
4688 /* These cases apply only to the frame that contains
4689 the active mini-buffer window. */
4690 && FRAME_HAS_MINIBUF_P (f
)
4691 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4693 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
4696 if (cursor_in_echo_area
< 0)
4698 /* Negative value of cursor_in_echo_area means put
4699 cursor at beginning of line. */
4705 /* Positive value of cursor_in_echo_area means put
4706 cursor at the end of the prompt. If the mini-buffer
4707 is several lines high, find the last line that has
4709 row
= FRAME_LINES (f
);
4715 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
4717 /* Frame rows are filled up with spaces that
4718 must be ignored here. */
4719 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
4721 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
4722 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
4725 && (last
- 1)->charpos
< 0)
4731 while (row
> top
&& col
== 0);
4733 /* Make sure COL is not out of range. */
4734 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
4736 /* If we have another row, advance cursor into it. */
4737 if (row
< FRAME_LINES (f
) - 1)
4739 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
4742 /* Otherwise move it back in range. */
4744 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
4748 cursor_to (f
, row
, col
);
4752 /* We have only one cursor on terminal frames. Use it to
4753 display the cursor of the selected window. */
4754 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
4755 if (w
->cursor
.vpos
>= 0
4756 /* The cursor vpos may be temporarily out of bounds
4757 in the following situation: There is one window,
4758 with the cursor in the lower half of it. The window
4759 is split, and a message causes a redisplay before
4760 a new cursor position has been computed. */
4761 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
4763 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
4764 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
4766 if (INTEGERP (w
->left_margin_cols
))
4767 x
+= XFASTINT (w
->left_margin_cols
);
4769 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
4770 cursor_to (f
, y
, x
);
4775 #if !PERIODIC_PREEMPTION_CHECKING
4779 clear_desired_matrices (f
);
4784 /* Do line insertions/deletions on frame F for frame-based redisplay. */
4787 scrolling (struct frame
*frame
)
4789 int unchanged_at_top
, unchanged_at_bottom
;
4792 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4793 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4794 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4795 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4797 int free_at_end_vpos
= FRAME_LINES (frame
);
4798 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
4799 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
4801 if (!current_matrix
)
4804 /* Compute hash codes of all the lines. Also calculate number of
4805 changed lines, number of unchanged lines at the beginning, and
4806 number of unchanged lines at the end. */
4808 unchanged_at_top
= 0;
4809 unchanged_at_bottom
= FRAME_LINES (frame
);
4810 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
4812 /* Give up on this scrolling if some old lines are not enabled. */
4813 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
4815 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
4816 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4818 /* This line cannot be redrawn, so don't let scrolling mess it. */
4819 new_hash
[i
] = old_hash
[i
];
4820 #define INFINITY 1000000 /* Taken from scroll.c */
4821 draw_cost
[i
] = INFINITY
;
4825 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
4826 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
4829 if (old_hash
[i
] != new_hash
[i
])
4832 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
4834 else if (i
== unchanged_at_top
)
4836 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
4839 /* If changed lines are few, don't allow preemption, don't scroll. */
4840 if ((!FRAME_SCROLL_REGION_OK (frame
)
4841 && changed_lines
< baud_rate
/ 2400)
4842 || unchanged_at_bottom
== FRAME_LINES (frame
))
4845 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
4846 - unchanged_at_bottom
);
4848 if (FRAME_SCROLL_REGION_OK (frame
))
4849 free_at_end_vpos
-= unchanged_at_bottom
;
4850 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
4851 free_at_end_vpos
= -1;
4853 /* If large window, fast terminal and few lines in common between
4854 current frame and desired frame, don't bother with i/d calc. */
4855 if (!FRAME_SCROLL_REGION_OK (frame
)
4856 && window_size
>= 18 && baud_rate
> 2400
4858 10 * scrolling_max_lines_saved (unchanged_at_top
,
4859 FRAME_LINES (frame
) - unchanged_at_bottom
,
4860 old_hash
, new_hash
, draw_cost
)))
4863 if (window_size
< 2)
4866 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
4867 draw_cost
+ unchanged_at_top
- 1,
4868 old_draw_cost
+ unchanged_at_top
- 1,
4869 old_hash
+ unchanged_at_top
- 1,
4870 new_hash
+ unchanged_at_top
- 1,
4871 free_at_end_vpos
- unchanged_at_top
);
4877 /* Count the number of blanks at the start of the vector of glyphs R
4878 which is LEN glyphs long. */
4881 count_blanks (struct glyph
*r
, int len
)
4885 for (i
= 0; i
< len
; ++i
)
4886 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
4893 /* Count the number of glyphs in common at the start of the glyph
4894 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
4895 of STR2. Value is the number of equal glyphs equal at the start. */
4898 count_match (struct glyph
*str1
, struct glyph
*end1
, struct glyph
*str2
, struct glyph
*end2
)
4900 struct glyph
*p1
= str1
;
4901 struct glyph
*p2
= str2
;
4905 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
4912 /* Char insertion/deletion cost vector, from term.c */
4914 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS ((f))])
4917 /* Perform a frame-based update on line VPOS in frame FRAME. */
4920 update_frame_line (struct frame
*f
, int vpos
)
4922 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
4924 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
4925 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4926 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4927 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
4928 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
4929 int must_write_whole_line_p
;
4930 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
4931 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
4932 != FACE_TTY_DEFAULT_BG_COLOR
);
4934 if (colored_spaces_p
)
4937 /* Current row not enabled means it has unknown contents. We must
4938 write the whole desired line in that case. */
4939 must_write_whole_line_p
= !current_row
->enabled_p
;
4940 if (must_write_whole_line_p
)
4947 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
4948 olen
= current_row
->used
[TEXT_AREA
];
4950 /* Ignore trailing spaces, if we can. */
4951 if (!write_spaces_p
)
4952 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
4956 current_row
->enabled_p
= 1;
4957 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
4959 /* If desired line is empty, just clear the line. */
4960 if (!desired_row
->enabled_p
)
4966 nbody
= desired_row
->glyphs
[TEXT_AREA
];
4967 nlen
= desired_row
->used
[TEXT_AREA
];
4968 nend
= nbody
+ nlen
;
4970 /* If display line has unknown contents, write the whole line. */
4971 if (must_write_whole_line_p
)
4973 /* Ignore spaces at the end, if we can. */
4974 if (!write_spaces_p
)
4975 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
4978 /* Write the contents of the desired line. */
4981 cursor_to (f
, vpos
, 0);
4982 write_glyphs (f
, nbody
, nlen
);
4985 /* Don't call clear_end_of_line if we already wrote the whole
4986 line. The cursor will not be at the right margin in that
4987 case but in the line below. */
4988 if (nlen
< FRAME_TOTAL_COLS (f
))
4990 cursor_to (f
, vpos
, nlen
);
4991 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
4994 /* Make sure we are in the right row, otherwise cursor movement
4995 with cmgoto might use `ch' in the wrong row. */
4996 cursor_to (f
, vpos
, 0);
4998 make_current (desired_matrix
, current_matrix
, vpos
);
5002 /* Pretend trailing spaces are not there at all,
5003 unless for one reason or another we must write all spaces. */
5004 if (!write_spaces_p
)
5005 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5008 /* If there's no i/d char, quickly do the best we can without it. */
5009 if (!FRAME_CHAR_INS_DEL_OK (f
))
5013 /* Find the first glyph in desired row that doesn't agree with
5014 a glyph in the current row, and write the rest from there on. */
5015 for (i
= 0; i
< nlen
; i
++)
5017 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5019 /* Find the end of the run of different glyphs. */
5023 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5024 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5027 /* Output this run of non-matching chars. */
5028 cursor_to (f
, vpos
, i
);
5029 write_glyphs (f
, nbody
+ i
, j
- i
);
5032 /* Now find the next non-match. */
5036 /* Clear the rest of the line, or the non-clear part of it. */
5039 cursor_to (f
, vpos
, nlen
);
5040 clear_end_of_line (f
, olen
);
5043 /* Make current row = desired row. */
5044 make_current (desired_matrix
, current_matrix
, vpos
);
5048 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5049 characters in a row. */
5053 /* If current line is blank, skip over initial spaces, if
5054 possible, and write the rest. */
5058 nsp
= count_blanks (nbody
, nlen
);
5062 cursor_to (f
, vpos
, nsp
);
5063 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5066 /* Exchange contents between current_frame and new_frame. */
5067 make_current (desired_matrix
, current_matrix
, vpos
);
5071 /* Compute number of leading blanks in old and new contents. */
5072 osp
= count_blanks (obody
, olen
);
5073 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5075 /* Compute number of matching chars starting with first non-blank. */
5076 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5077 nbody
+ nsp
, nbody
+ nlen
);
5079 /* Spaces in new match implicit space past the end of old. */
5080 /* A bug causing this to be a no-op was fixed in 18.29. */
5081 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5084 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5088 /* Avoid doing insert/delete char
5089 just cause number of leading spaces differs
5090 when the following text does not match. */
5091 if (begmatch
== 0 && osp
!= nsp
)
5092 osp
= nsp
= min (osp
, nsp
);
5094 /* Find matching characters at end of line */
5097 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5099 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5104 endmatch
= obody
+ olen
- op1
;
5106 /* tem gets the distance to insert or delete.
5107 endmatch is how many characters we save by doing so.
5110 tem
= (nlen
- nsp
) - (olen
- osp
);
5112 && (!FRAME_CHAR_INS_DEL_OK (f
)
5113 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5116 /* nsp - osp is the distance to insert or delete.
5117 If that is nonzero, begmatch is known to be nonzero also.
5118 begmatch + endmatch is how much we save by doing the ins/del.
5122 && (!FRAME_CHAR_INS_DEL_OK (f
)
5123 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5127 osp
= nsp
= min (osp
, nsp
);
5130 /* Now go through the line, inserting, writing and
5131 deleting as appropriate. */
5135 cursor_to (f
, vpos
, nsp
);
5136 delete_glyphs (f
, osp
- nsp
);
5140 /* If going to delete chars later in line
5141 and insert earlier in the line,
5142 must delete first to avoid losing data in the insert */
5143 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5145 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5146 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5147 olen
= nlen
- (nsp
- osp
);
5149 cursor_to (f
, vpos
, osp
);
5150 insert_glyphs (f
, 0, nsp
- osp
);
5154 tem
= nsp
+ begmatch
+ endmatch
;
5155 if (nlen
!= tem
|| olen
!= tem
)
5157 if (!endmatch
|| nlen
== olen
)
5159 /* If new text being written reaches right margin, there is
5160 no need to do clear-to-eol at the end of this function
5161 (and it would not be safe, since cursor is not going to
5162 be "at the margin" after the text is done). */
5163 if (nlen
== FRAME_TOTAL_COLS (f
))
5166 /* Function write_glyphs is prepared to do nothing
5167 if passed a length <= 0. Check it here to avoid
5168 unnecessary cursor movement. */
5171 cursor_to (f
, vpos
, nsp
+ begmatch
);
5172 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5175 else if (nlen
> olen
)
5177 /* Here, we used to have the following simple code:
5178 ----------------------------------------
5179 write_glyphs (nbody + nsp + begmatch, olen - tem);
5180 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5181 ----------------------------------------
5182 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5183 is a padding glyph. */
5184 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5187 cursor_to (f
, vpos
, nsp
+ begmatch
);
5189 /* Calculate columns we can actually overwrite. */
5190 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5192 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5194 /* If we left columns to be overwritten, we must delete them. */
5195 del
= olen
- tem
- out
;
5197 delete_glyphs (f
, del
);
5199 /* At last, we insert columns not yet written out. */
5200 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5203 else if (olen
> nlen
)
5205 cursor_to (f
, vpos
, nsp
+ begmatch
);
5206 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5207 delete_glyphs (f
, olen
- nlen
);
5213 /* If any unerased characters remain after the new line, erase them. */
5216 cursor_to (f
, vpos
, nlen
);
5217 clear_end_of_line (f
, olen
);
5220 /* Exchange contents between current_frame and new_frame. */
5221 make_current (desired_matrix
, current_matrix
, vpos
);
5226 /***********************************************************************
5227 X/Y Position -> Buffer Position
5228 ***********************************************************************/
5230 /* Determine what's under window-relative pixel position (*X, *Y).
5231 Return the OBJECT (string or buffer) that's there.
5232 Return in *POS the position in that object.
5233 Adjust *X and *Y to character positions.
5234 Return in *DX and *DY the pixel coordinates of the click,
5235 relative to the top left corner of OBJECT, or relative to
5236 the top left corner of the character glyph at (*X, *Y)
5238 Return WIDTH and HEIGHT of the object at (*X, *Y), or zero
5239 if the coordinates point to an empty area of the display. */
5242 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
)
5245 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5246 struct text_pos startp
;
5248 struct glyph_row
*row
;
5249 #ifdef HAVE_WINDOW_SYSTEM
5250 struct image
*img
= 0;
5253 void *itdata
= NULL
;
5255 /* We used to set current_buffer directly here, but that does the
5256 wrong thing with `face-remapping-alist' (bug#2044). */
5257 Fset_buffer (w
->buffer
);
5258 itdata
= bidi_shelve_cache ();
5259 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5260 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5261 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5262 start_display (&it
, w
, startp
);
5266 /* First, move to the beginning of the row corresponding to *Y. We
5267 need to be in that row to get the correct value of base paragraph
5268 direction for the text at (*X, *Y). */
5269 move_it_to (&it
, -1, 0, *y
, -1, MOVE_TO_X
| MOVE_TO_Y
);
5271 /* TO_X is the pixel position that the iterator will compute for the
5272 glyph at *X. We add it.first_visible_x because iterator
5273 positions include the hscroll. */
5274 to_x
= x0
+ it
.first_visible_x
;
5275 if (it
.bidi_it
.paragraph_dir
== R2L
)
5276 /* For lines in an R2L paragraph, we need to mirror TO_X wrt the
5277 text area. This is because the iterator, even in R2L
5278 paragraphs, delivers glyphs as if they started at the left
5279 margin of the window. (When we actually produce glyphs for
5280 display, we reverse their order in PRODUCE_GLYPHS, but the
5281 iterator doesn't know about that.) The following line adjusts
5282 the pixel position to the iterator geometry, which is what
5283 move_it_* routines use. (The -1 is because in a window whose
5284 text-area width is W, the rightmost pixel position is W-1, and
5285 it should be mirrored into zero pixel position.) */
5286 to_x
= window_box_width (w
, TEXT_AREA
) - to_x
- 1;
5288 /* Now move horizontally in the row to the glyph under *X. Second
5289 argument is ZV to prevent move_it_in_display_line from matching
5290 based on buffer positions. */
5291 move_it_in_display_line (&it
, ZV
, to_x
, MOVE_TO_X
);
5292 bidi_unshelve_cache (itdata
, 0);
5294 Fset_buffer (old_current_buffer
);
5296 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5297 *dy
= *y
- it
.current_y
;
5300 if (STRINGP (it
.string
))
5303 if (it
.what
== IT_COMPOSITION
5304 && it
.cmp_it
.nchars
> 1
5305 && it
.cmp_it
.reversed_p
)
5307 /* The current display element is a grapheme cluster in a
5308 composition. In that case, we need the position of the first
5309 character of the cluster. But, as it.cmp_it.reversed_p is 1,
5310 it.current points to the last character of the cluster, thus
5311 we must move back to the first character of the same
5313 CHARPOS (pos
->pos
) -= it
.cmp_it
.nchars
- 1;
5314 if (STRINGP (it
.string
))
5315 BYTEPOS (pos
->pos
) = string_char_to_byte (string
, CHARPOS (pos
->pos
));
5317 BYTEPOS (pos
->pos
) = buf_charpos_to_bytepos (XBUFFER (w
->buffer
),
5318 CHARPOS (pos
->pos
));
5321 #ifdef HAVE_WINDOW_SYSTEM
5322 if (it
.what
== IT_IMAGE
)
5324 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5325 && !NILP (img
->spec
))
5326 *object
= img
->spec
;
5330 if (it
.vpos
< w
->current_matrix
->nrows
5331 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5334 if (it
.hpos
< row
->used
[TEXT_AREA
])
5336 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5337 #ifdef HAVE_WINDOW_SYSTEM
5340 *dy
-= row
->ascent
- glyph
->ascent
;
5341 *dx
+= glyph
->slice
.img
.x
;
5342 *dy
+= glyph
->slice
.img
.y
;
5343 /* Image slices positions are still relative to the entire image */
5344 *width
= img
->width
;
5345 *height
= img
->height
;
5350 *width
= glyph
->pixel_width
;
5351 *height
= glyph
->ascent
+ glyph
->descent
;
5357 *height
= row
->height
;
5362 *width
= *height
= 0;
5365 /* Add extra (default width) columns if clicked after EOL. */
5366 x1
= max (0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5368 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5377 /* Value is the string under window-relative coordinates X/Y in the
5378 mode line or header line (PART says which) of window W, or nil if none.
5379 *CHARPOS is set to the position in the string returned. */
5382 mode_line_string (struct window
*w
, enum window_part part
,
5383 int *x
, int *y
, ptrdiff_t *charpos
, Lisp_Object
*object
,
5384 int *dx
, int *dy
, int *width
, int *height
)
5386 struct glyph_row
*row
;
5387 struct glyph
*glyph
, *end
;
5389 Lisp_Object string
= Qnil
;
5391 if (part
== ON_MODE_LINE
)
5392 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5394 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5396 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5398 if (row
->mode_line_p
&& row
->enabled_p
)
5400 /* Find the glyph under X. If we find one with a string object,
5401 it's the one we were looking for. */
5402 glyph
= row
->glyphs
[TEXT_AREA
];
5403 end
= glyph
+ row
->used
[TEXT_AREA
];
5404 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5405 x0
-= glyph
->pixel_width
;
5406 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5409 string
= glyph
->object
;
5410 *charpos
= glyph
->charpos
;
5411 *width
= glyph
->pixel_width
;
5412 *height
= glyph
->ascent
+ glyph
->descent
;
5413 #ifdef HAVE_WINDOW_SYSTEM
5414 if (glyph
->type
== IMAGE_GLYPH
)
5417 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5419 *object
= img
->spec
;
5420 y0
-= row
->ascent
- glyph
->ascent
;
5426 /* Add extra (default width) columns if clicked after EOL. */
5427 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5429 *height
= row
->height
;
5436 *width
= *height
= 0;
5446 /* Value is the string under window-relative coordinates X/Y in either
5447 marginal area, or nil if none. *CHARPOS is set to the position in
5448 the string returned. */
5451 marginal_area_string (struct window
*w
, enum window_part part
,
5452 int *x
, int *y
, ptrdiff_t *charpos
, Lisp_Object
*object
,
5453 int *dx
, int *dy
, int *width
, int *height
)
5455 struct glyph_row
*row
= w
->current_matrix
->rows
;
5456 struct glyph
*glyph
, *end
;
5457 int x0
, y0
, i
, wy
= *y
;
5459 Lisp_Object string
= Qnil
;
5461 if (part
== ON_LEFT_MARGIN
)
5462 area
= LEFT_MARGIN_AREA
;
5463 else if (part
== ON_RIGHT_MARGIN
)
5464 area
= RIGHT_MARGIN_AREA
;
5468 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5469 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5472 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5476 /* Find the glyph under X. If we find one with a string object,
5477 it's the one we were looking for. */
5478 if (area
== RIGHT_MARGIN_AREA
)
5479 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5480 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5481 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5482 + window_box_width (w
, LEFT_MARGIN_AREA
)
5483 + window_box_width (w
, TEXT_AREA
));
5485 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5486 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5489 glyph
= row
->glyphs
[area
];
5490 end
= glyph
+ row
->used
[area
];
5491 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5492 x0
-= glyph
->pixel_width
;
5493 *x
= glyph
- row
->glyphs
[area
];
5496 string
= glyph
->object
;
5497 *charpos
= glyph
->charpos
;
5498 *width
= glyph
->pixel_width
;
5499 *height
= glyph
->ascent
+ glyph
->descent
;
5500 #ifdef HAVE_WINDOW_SYSTEM
5501 if (glyph
->type
== IMAGE_GLYPH
)
5504 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5506 *object
= img
->spec
;
5507 y0
-= row
->ascent
- glyph
->ascent
;
5508 x0
+= glyph
->slice
.img
.x
;
5509 y0
+= glyph
->slice
.img
.y
;
5515 /* Add extra (default width) columns if clicked after EOL. */
5516 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5518 *height
= row
->height
;
5525 *width
= *height
= 0;
5535 /***********************************************************************
5536 Changing Frame Sizes
5537 ***********************************************************************/
5542 window_change_signal (int signalnum
) /* If we don't have an argument, */
5543 /* some compilers complain in signal calls. */
5546 int old_errno
= errno
;
5548 struct tty_display_info
*tty
;
5550 signal (SIGWINCH
, window_change_signal
);
5551 SIGNAL_THREAD_CHECK (signalnum
);
5553 /* The frame size change obviously applies to a single
5554 termcap-controlled terminal, but we can't decide which.
5555 Therefore, we resize the frames corresponding to each tty.
5557 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
5559 if (! tty
->term_initted
)
5562 /* Suspended tty frames have tty->input == NULL avoid trying to
5567 get_tty_size (fileno (tty
->input
), &width
, &height
);
5569 if (width
> 5 && height
> 2) {
5570 Lisp_Object tail
, frame
;
5572 FOR_EACH_FRAME (tail
, frame
)
5573 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
5574 /* Record the new sizes, but don't reallocate the data
5575 structures now. Let that be done later outside of the
5577 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5583 #endif /* SIGWINCH */
5586 /* Do any change in frame size that was requested by a signal. SAFE
5587 non-zero means this function is called from a place where it is
5588 safe to change frame sizes while a redisplay is in progress. */
5591 do_pending_window_change (int safe
)
5593 /* If window_change_signal should have run before, run it now. */
5594 if (redisplaying_p
&& !safe
)
5597 while (delayed_size_change
)
5599 Lisp_Object tail
, frame
;
5601 delayed_size_change
= 0;
5603 FOR_EACH_FRAME (tail
, frame
)
5605 struct frame
*f
= XFRAME (frame
);
5607 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
5608 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
5615 /* Change the frame height and/or width. Values may be given as zero to
5616 indicate no change is to take place.
5618 If DELAY is non-zero, then assume we're being called from a signal
5619 handler, and queue the change for later - perhaps the next
5620 redisplay. Since this tries to resize windows, we can't call it
5621 from a signal handler.
5623 SAFE non-zero means this function is called from a place where it's
5624 safe to change frame sizes while a redisplay is in progress. */
5627 change_frame_size (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5629 Lisp_Object tail
, frame
;
5631 if (FRAME_MSDOS_P (f
))
5633 /* On MS-DOS, all frames use the same screen, so a change in
5634 size affects all frames. Termcap now supports multiple
5636 FOR_EACH_FRAME (tail
, frame
)
5637 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5638 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5639 pretend
, delay
, safe
);
5642 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5646 change_frame_size_1 (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5648 int new_frame_total_cols
;
5649 ptrdiff_t count
= SPECPDL_INDEX ();
5651 /* If we can't deal with the change now, queue it for later. */
5652 if (delay
|| (redisplaying_p
&& !safe
))
5654 f
->new_text_lines
= newheight
;
5655 f
->new_text_cols
= newwidth
;
5656 delayed_size_change
= 1;
5660 /* This size-change overrides any pending one for this frame. */
5661 f
->new_text_lines
= 0;
5662 f
->new_text_cols
= 0;
5664 /* If an argument is zero, set it to the current value. */
5666 newheight
= FRAME_LINES (f
);
5668 newwidth
= FRAME_COLS (f
);
5670 /* Compute width of windows in F.
5671 This is the width of the frame without vertical scroll bars. */
5672 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
5674 /* Round up to the smallest acceptable size. */
5675 check_frame_size (f
, &newheight
, &newwidth
);
5677 /* If we're not changing the frame size, quit now. */
5678 /* Frame width may be unchanged but the text portion may change, for example,
5679 fullscreen and remove/add scroll bar. */
5680 if (newheight
== FRAME_LINES (f
)
5681 && newwidth
== FRAME_COLS (f
) // text portion unchanged
5682 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
)) // frame width unchanged
5688 /* We only can set screen dimensions to certain values supported
5689 by our video hardware. Try to find the smallest size greater
5690 or equal to the requested dimensions. */
5691 dos_set_window_size (&newheight
, &newwidth
);
5694 if (newheight
!= FRAME_LINES (f
))
5696 resize_frame_windows (f
, newheight
, 0);
5698 /* MSDOS frames cannot PRETEND, as they change frame size by
5699 manipulating video hardware. */
5700 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5701 FrameRows (FRAME_TTY (f
)) = newheight
;
5704 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
5706 resize_frame_windows (f
, new_frame_total_cols
, 1);
5708 /* MSDOS frames cannot PRETEND, as they change frame size by
5709 manipulating video hardware. */
5710 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5711 FrameCols (FRAME_TTY (f
)) = newwidth
;
5713 if (WINDOWP (f
->tool_bar_window
))
5714 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
5717 FRAME_LINES (f
) = newheight
;
5718 SET_FRAME_COLS (f
, newwidth
);
5721 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5722 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5724 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5726 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5727 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5728 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5729 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5733 calculate_costs (f
);
5734 SET_FRAME_GARBAGED (f
);
5739 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5741 run_window_configuration_change_hook (f
);
5743 unbind_to (count
, Qnil
);
5748 /***********************************************************************
5749 Terminal Related Lisp Functions
5750 ***********************************************************************/
5752 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5753 1, 1, "FOpen termscript file: ",
5754 doc
: /* Start writing all terminal output to FILE as well as the terminal.
5755 FILE = nil means just close any termscript file currently open. */)
5758 struct tty_display_info
*tty
;
5760 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
5761 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
5762 error ("Current frame is not on a tty device");
5766 if (tty
->termscript
!= 0)
5769 fclose (tty
->termscript
);
5772 tty
->termscript
= 0;
5776 file
= Fexpand_file_name (file
, Qnil
);
5777 tty
->termscript
= fopen (SSDATA (file
), "w");
5778 if (tty
->termscript
== 0)
5779 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5785 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5786 Ssend_string_to_terminal
, 1, 2, 0,
5787 doc
: /* Send STRING to the terminal without alteration.
5788 Control characters in STRING will have terminal-dependent effects.
5790 Optional parameter TERMINAL specifies the tty terminal device to use.
5791 It may be a terminal object, a frame, or nil for the terminal used by
5792 the currently selected frame. In batch mode, STRING is sent to stdout
5793 when TERMINAL is nil. */)
5794 (Lisp_Object string
, Lisp_Object terminal
)
5796 struct terminal
*t
= get_terminal (terminal
, 1);
5799 /* ??? Perhaps we should do something special for multibyte strings here. */
5800 CHECK_STRING (string
);
5804 error ("Unknown terminal device");
5806 if (t
->type
== output_initial
)
5808 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
5809 error ("Device %d is not a termcap terminal device", t
->id
);
5812 struct tty_display_info
*tty
= t
->display_info
.tty
;
5815 error ("Terminal is currently suspended");
5817 if (tty
->termscript
)
5819 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
5820 fflush (tty
->termscript
);
5824 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
5831 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5832 doc
: /* Beep, or flash the screen.
5833 Also, unless an argument is given,
5834 terminate any keyboard macro currently executing. */)
5842 ring_bell (XFRAME (selected_frame
));
5851 bitch_at_user (void)
5855 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
5856 error ("Keyboard macro terminated by a command ringing the bell");
5858 ring_bell (XFRAME (selected_frame
));
5863 /***********************************************************************
5865 ***********************************************************************/
5867 /* Convert a positive value DURATION to a seconds count *PSEC plus a
5868 microseconds count *PUSEC, rounding up. On overflow return the
5871 duration_to_sec_usec (double duration
, int *psec
, int *pusec
)
5873 int MILLION
= 1000000;
5874 int sec
= INT_MAX
, usec
= MILLION
- 1;
5876 if (duration
< INT_MAX
+ 1.0)
5879 double usdouble
= (duration
- s
) * MILLION
;
5880 int usfloor
= usdouble
;
5881 int usceil
= usfloor
+ (usfloor
< usdouble
);
5883 if (usceil
< MILLION
)
5888 else if (sec
< INT_MAX
)
5899 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
5900 doc
: /* Pause, without updating display, for SECONDS seconds.
5901 SECONDS may be a floating-point value, meaning that you can wait for a
5902 fraction of a second. Optional second arg MILLISECONDS specifies an
5903 additional wait period, in milliseconds; this may be useful if your
5904 Emacs was built without floating point support.
5905 \(Not all operating systems support waiting for a fraction of a second.) */)
5906 (Lisp_Object seconds
, Lisp_Object milliseconds
)
5909 double duration
= extract_float (seconds
);
5911 if (!NILP (milliseconds
))
5913 CHECK_NUMBER (milliseconds
);
5914 duration
+= XINT (milliseconds
) / 1000.0;
5917 if (! (0 < duration
))
5920 duration_to_sec_usec (duration
, &sec
, &usec
);
5922 #ifndef EMACS_HAS_USECS
5923 if (sec
== 0 && usec
!= 0)
5924 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
5927 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
5933 /* This is just like wait_reading_process_output, except that
5936 TIMEOUT is number of seconds to wait (float or integer),
5937 or t to wait forever.
5938 READING is 1 if reading input.
5939 If DO_DISPLAY is >0 display process output while waiting.
5940 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
5944 sit_for (Lisp_Object timeout
, int reading
, int do_display
)
5948 swallow_events (do_display
);
5950 if ((detect_input_pending_run_timers (do_display
))
5951 || !NILP (Vexecuting_kbd_macro
))
5954 if (do_display
>= 2)
5955 redisplay_preserve_echo_area (2);
5957 if (EQ (timeout
, Qt
))
5964 double duration
= extract_float (timeout
);
5966 if (! (0 < duration
))
5969 duration_to_sec_usec (duration
, &sec
, &usec
);
5976 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
5979 return detect_input_pending () ? Qnil
: Qt
;
5983 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
5984 doc
: /* Perform redisplay if no input is available.
5985 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
5986 perform a full redisplay even if input is available.
5987 Return t if redisplay was performed, nil otherwise. */)
5993 if ((detect_input_pending_run_timers (1)
5994 && NILP (force
) && !redisplay_dont_pause
)
5995 || !NILP (Vexecuting_kbd_macro
))
5998 count
= SPECPDL_INDEX ();
5999 if (!NILP (force
) && !redisplay_dont_pause
)
6000 specbind (Qredisplay_dont_pause
, Qt
);
6001 redisplay_preserve_echo_area (2);
6002 unbind_to (count
, Qnil
);
6008 /***********************************************************************
6009 Other Lisp Functions
6010 ***********************************************************************/
6012 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6013 session's frames, frame names, buffers, buffer-read-only flags, and
6014 buffer-modified-flags. */
6016 static Lisp_Object frame_and_buffer_state
;
6019 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6020 Sframe_or_buffer_changed_p
, 0, 1, 0,
6021 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6022 VARIABLE is a variable name whose value is either nil or a state vector
6023 that will be updated to contain all frames and buffers,
6024 aside from buffers whose names start with space,
6025 along with the buffers' read-only and modified flags. This allows a fast
6026 check to see whether buffer menus might need to be recomputed.
6027 If this function returns non-nil, it updates the internal vector to reflect
6030 If VARIABLE is nil, an internal variable is used. Users should not
6031 pass nil for VARIABLE. */)
6032 (Lisp_Object variable
)
6034 Lisp_Object state
, tail
, frame
, buf
;
6035 Lisp_Object
*vecp
, *end
;
6038 if (! NILP (variable
))
6040 CHECK_SYMBOL (variable
);
6041 state
= Fsymbol_value (variable
);
6042 if (! VECTORP (state
))
6046 state
= frame_and_buffer_state
;
6048 vecp
= XVECTOR (state
)->contents
;
6049 end
= vecp
+ ASIZE (state
);
6051 FOR_EACH_FRAME (tail
, frame
)
6055 if (!EQ (*vecp
++, frame
))
6059 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6062 /* Check that the buffer info matches. */
6063 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6065 buf
= XCDR (XCAR (tail
));
6066 /* Ignore buffers that aren't included in buffer lists. */
6067 if (SREF (BVAR (XBUFFER (buf
), name
), 0) == ' ')
6071 if (!EQ (*vecp
++, buf
))
6075 if (!EQ (*vecp
++, BVAR (XBUFFER (buf
), read_only
)))
6079 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6084 /* Detect deletion of a buffer at the end of the list. */
6085 if (EQ (*vecp
, Qlambda
))
6088 /* Come here if we decide the data has changed. */
6090 /* Count the size we will need.
6091 Start with 1 so there is room for at least one lambda at the end. */
6093 FOR_EACH_FRAME (tail
, frame
)
6095 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6097 /* Reallocate the vector if data has grown to need it,
6098 or if it has shrunk a lot. */
6099 if (! VECTORP (state
)
6100 || n
> ASIZE (state
)
6101 || n
+ 20 < ASIZE (state
) / 2)
6102 /* Add 20 extra so we grow it less often. */
6104 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6105 if (! NILP (variable
))
6106 Fset (variable
, state
);
6108 frame_and_buffer_state
= state
;
6111 /* Record the new data in the (possibly reallocated) vector. */
6112 vecp
= XVECTOR (state
)->contents
;
6113 FOR_EACH_FRAME (tail
, frame
)
6116 *vecp
++ = XFRAME (frame
)->name
;
6118 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6120 buf
= XCDR (XCAR (tail
));
6121 /* Ignore buffers that aren't included in buffer lists. */
6122 if (SREF (BVAR (XBUFFER (buf
), name
), 0) == ' ')
6125 *vecp
++ = BVAR (XBUFFER (buf
), read_only
);
6126 *vecp
++ = Fbuffer_modified_p (buf
);
6128 /* Fill up the vector with lambdas (always at least one). */
6130 while (vecp
- XVECTOR (state
)->contents
6133 /* Make sure we didn't overflow the vector. */
6134 if (vecp
- XVECTOR (state
)->contents
6142 /***********************************************************************
6144 ***********************************************************************/
6146 /* Initialization done when Emacs fork is started, before doing stty.
6147 Determine terminal type and set terminal_driver. Then invoke its
6148 decoding routine to set up variables in the terminal package. */
6153 char *terminal_type
;
6155 /* Construct the space glyph. */
6156 space_glyph
.type
= CHAR_GLYPH
;
6157 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6158 space_glyph
.charpos
= -1;
6161 cursor_in_echo_area
= 0;
6162 terminal_type
= (char *) 0;
6164 /* Now is the time to initialize this; it's used by init_sys_modes
6166 Vinitial_window_system
= Qnil
;
6168 /* SIGWINCH needs to be handled no matter what display we start
6169 with. Otherwise newly opened tty frames will not resize
6174 #endif /* CANNOT_DUMP */
6175 signal (SIGWINCH
, window_change_signal
);
6176 #endif /* SIGWINCH */
6178 /* If running as a daemon, no need to initialize any frames/terminal. */
6182 /* If the user wants to use a window system, we shouldn't bother
6183 initializing the terminal. This is especially important when the
6184 terminal is so dumb that emacs gives up before and doesn't bother
6185 using the window system.
6187 If the DISPLAY environment variable is set and nonempty,
6188 try to use X, and die with an error message if that doesn't work. */
6190 #ifdef HAVE_X_WINDOWS
6191 if (! inhibit_window_system
&& ! display_arg
)
6194 display
= getenv ("DISPLAY");
6195 display_arg
= (display
!= 0 && *display
!= 0);
6197 if (display_arg
&& !x_display_ok (display
))
6199 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6201 inhibit_window_system
= 1;
6205 if (!inhibit_window_system
&& display_arg
)
6207 Vinitial_window_system
= Qx
;
6209 Vwindow_system_version
= make_number (11);
6211 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6212 /* In some versions of ncurses,
6213 tputs crashes if we have not called tgetent.
6215 { char b
[2044]; tgetent (b
, "xterm");}
6217 adjust_frame_glyphs_initially ();
6220 #endif /* HAVE_X_WINDOWS */
6223 if (!inhibit_window_system
)
6225 Vinitial_window_system
= Qw32
;
6226 Vwindow_system_version
= make_number (1);
6227 adjust_frame_glyphs_initially ();
6230 #endif /* HAVE_NTGUI */
6233 if (!inhibit_window_system
6239 Vinitial_window_system
= Qns
;
6240 Vwindow_system_version
= make_number (10);
6241 adjust_frame_glyphs_initially ();
6246 /* If no window system has been specified, try to use the terminal. */
6249 fatal ("standard input is not a tty");
6254 terminal_type
= "w32console";
6256 /* Look at the TERM variable. */
6257 terminal_type
= (char *) getenv ("TERM");
6261 #ifdef HAVE_WINDOW_SYSTEM
6262 if (! inhibit_window_system
)
6263 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6265 #endif /* HAVE_WINDOW_SYSTEM */
6266 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6272 struct frame
*f
= XFRAME (selected_frame
);
6274 /* Open a display on the controlling tty. */
6275 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6277 /* Convert the initial frame to use the new display. */
6278 if (f
->output_method
!= output_initial
)
6280 f
->output_method
= t
->type
;
6283 t
->reference_count
++;
6285 f
->output_data
.tty
->display_info
= &the_only_display_info
;
6287 if (f
->output_method
== output_termcap
)
6288 create_tty_output (f
);
6290 t
->display_info
.tty
->top_frame
= selected_frame
;
6291 change_frame_size (XFRAME (selected_frame
),
6292 FrameRows (t
->display_info
.tty
),
6293 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6295 /* Delete the initial terminal. */
6296 if (--initial_terminal
->reference_count
== 0
6297 && initial_terminal
->delete_terminal_hook
)
6298 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6300 /* Update frame parameters to reflect the new type. */
6301 Fmodify_frame_parameters
6302 (selected_frame
, Fcons (Fcons (Qtty_type
,
6303 Ftty_type (selected_frame
)), Qnil
));
6304 if (t
->display_info
.tty
->name
)
6305 Fmodify_frame_parameters (selected_frame
,
6306 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6309 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
6314 struct frame
*sf
= SELECTED_FRAME ();
6315 int width
= FRAME_TOTAL_COLS (sf
);
6316 int height
= FRAME_LINES (sf
);
6318 /* If these sizes are so big they cause overflow, just ignore the
6319 change. It's not clear what better we could do. The rest of
6320 the code assumes that (width + 2) * height * sizeof (struct glyph)
6321 does not overflow and does not exceed PTRDIFF_MAX or SIZE_MAX. */
6322 if (INT_ADD_RANGE_OVERFLOW (width
, 2, INT_MIN
, INT_MAX
)
6323 || INT_MULTIPLY_RANGE_OVERFLOW (width
+ 2, height
, INT_MIN
, INT_MAX
)
6324 || (min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof (struct glyph
)
6325 < (width
+ 2) * height
))
6326 fatal ("screen size %dx%d too big", width
, height
);
6329 adjust_frame_glyphs_initially ();
6330 calculate_costs (XFRAME (selected_frame
));
6332 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6335 && NILP (Vinitial_window_system
))
6337 /* For the initial frame, we don't have any way of knowing what
6338 are the foreground and background colors of the terminal. */
6339 struct frame
*sf
= SELECTED_FRAME ();
6341 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6342 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6343 call0 (intern ("tty-set-up-initial-frame-faces"));
6349 /***********************************************************************
6351 ***********************************************************************/
6353 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6354 Sinternal_show_cursor
, 2, 2, 0,
6355 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6356 WINDOW nil means use the selected window. SHOW non-nil means
6357 show a cursor in WINDOW in the next redisplay. SHOW nil means
6358 don't show a cursor. */)
6359 (Lisp_Object window
, Lisp_Object show
)
6361 /* Don't change cursor state while redisplaying. This could confuse
6363 if (!redisplaying_p
)
6366 window
= selected_window
;
6368 CHECK_WINDOW (window
);
6370 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6377 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6378 Sinternal_show_cursor_p
, 0, 1, 0,
6379 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6380 WINDOW nil or omitted means report on the selected window. */)
6381 (Lisp_Object window
)
6386 window
= selected_window
;
6388 CHECK_WINDOW (window
);
6390 w
= XWINDOW (window
);
6391 return w
->cursor_off_p
? Qnil
: Qt
;
6394 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
6395 Slast_nonminibuf_frame
, 0, 0, 0,
6396 doc
: /* Value is last nonminibuffer frame. */)
6399 Lisp_Object frame
= Qnil
;
6401 if (last_nonminibuf_frame
)
6402 XSETFRAME (frame
, last_nonminibuf_frame
);
6407 /***********************************************************************
6409 ***********************************************************************/
6412 syms_of_display (void)
6414 defsubr (&Sredraw_frame
);
6415 defsubr (&Sredraw_display
);
6416 defsubr (&Sframe_or_buffer_changed_p
);
6417 defsubr (&Sopen_termscript
);
6419 defsubr (&Sredisplay
);
6420 defsubr (&Ssleep_for
);
6421 defsubr (&Ssend_string_to_terminal
);
6422 defsubr (&Sinternal_show_cursor
);
6423 defsubr (&Sinternal_show_cursor_p
);
6424 defsubr (&Slast_nonminibuf_frame
);
6427 defsubr (&Sdump_redisplay_history
);
6430 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6431 staticpro (&frame_and_buffer_state
);
6433 DEFSYM (Qdisplay_table
, "display-table");
6434 DEFSYM (Qredisplay_dont_pause
, "redisplay-dont-pause");
6436 DEFVAR_INT ("baud-rate", baud_rate
,
6437 doc
: /* *The output baud rate of the terminal.
6438 On most systems, changing this value will affect the amount of padding
6439 and the other strategic decisions made during redisplay. */);
6441 DEFVAR_BOOL ("inverse-video", inverse_video
,
6442 doc
: /* *Non-nil means invert the entire frame display.
6443 This means everything is in inverse video which otherwise would not be. */);
6445 DEFVAR_BOOL ("visible-bell", visible_bell
,
6446 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6448 See also `ring-bell-function'. */);
6450 DEFVAR_BOOL ("no-redraw-on-reenter", no_redraw_on_reenter
,
6451 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6452 A non-nil value is useful if the terminal can automatically preserve
6453 Emacs's frame display when you reenter Emacs.
6454 It is up to you to set this variable if your terminal can do that. */);
6456 DEFVAR_LISP ("initial-window-system", Vinitial_window_system
,
6457 doc
: /* Name of the window system that Emacs uses for the first frame.
6458 The value is a symbol:
6459 nil for a termcap frame (a character-only terminal),
6460 'x' for an Emacs frame that is really an X window,
6461 'w32' for an Emacs frame that is a window on MS-Windows display,
6462 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display,
6463 'pc' for a direct-write MS-DOS frame.
6465 Use of this variable as a boolean is deprecated. Instead,
6466 use `display-graphic-p' or any of the other `display-*-p'
6467 predicates which report frame's specific UI-related capabilities. */);
6469 DEFVAR_KBOARD ("window-system", Vwindow_system
,
6470 doc
: /* Name of window system through which the selected frame is displayed.
6471 The value is a symbol:
6472 nil for a termcap frame (a character-only terminal),
6473 'x' for an Emacs frame that is really an X window,
6474 'w32' for an Emacs frame that is a window on MS-Windows display,
6475 'ns' for an Emacs frame on a GNUstep or Macintosh Cocoa display,
6476 'pc' for a direct-write MS-DOS frame.
6478 Use of this variable as a boolean is deprecated. Instead,
6479 use `display-graphic-p' or any of the other `display-*-p'
6480 predicates which report frame's specific UI-related capabilities. */);
6482 DEFVAR_LISP ("window-system-version", Vwindow_system_version
,
6483 doc
: /* The version number of the window system in use.
6484 For X windows, this is 11. */);
6486 DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area
,
6487 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6489 DEFVAR_LISP ("glyph-table", Vglyph_table
,
6490 doc
: /* Table defining how to output a glyph code to the frame.
6491 If not nil, this is a vector indexed by glyph code to define the glyph.
6492 Each element can be:
6493 integer: a glyph code which this glyph is an alias for.
6494 string: output this glyph using that string (not impl. in X windows).
6495 nil: this glyph mod 524288 is the code of a character to output,
6496 and this glyph / 524288 is the face number (see `face-id') to use
6497 while outputting it. */);
6498 Vglyph_table
= Qnil
;
6500 DEFVAR_LISP ("standard-display-table", Vstandard_display_table
,
6501 doc
: /* Display table to use for buffers that specify none.
6502 See `buffer-display-table' for more information. */);
6503 Vstandard_display_table
= Qnil
;
6505 DEFVAR_BOOL ("redisplay-dont-pause", redisplay_dont_pause
,
6506 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6507 redisplay_dont_pause
= 0;
6509 #if PERIODIC_PREEMPTION_CHECKING
6510 DEFVAR_LISP ("redisplay-preemption-period", Vredisplay_preemption_period
,
6511 doc
: /* *The period in seconds between checking for input during redisplay.
6512 If input is detected, redisplay is pre-empted, and the input is processed.
6513 If nil, never pre-empt redisplay. */);
6514 Vredisplay_preemption_period
= make_float (0.10);
6521 Vinitial_window_system
= Qnil
;
6522 Vwindow_system_version
= Qnil
;