1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985,86,87,88,93,94,95,97,98,1999,2000,01,02,2003
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "systty.h" /* For emacs_tty in termchar.h */
35 #include "termhooks.h"
36 /* cm.h must come after dispextern.h on Windows. */
37 #include "dispextern.h"
47 #include "intervals.h"
48 #include "blockinput.h"
51 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
52 include the following file. */
53 /* #include "systty.h" */
54 #include "syssignal.h"
58 #endif /* HAVE_X_WINDOWS */
62 #endif /* HAVE_NTGUI */
68 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
73 /* To get the prototype for `sleep'. */
79 /* Get number of chars of output now in the buffer of a stdio stream.
80 This ought to be built in in stdio, but it isn't. Some s- files
81 override this because their stdio internals differ. */
83 #ifdef __GNU_LIBRARY__
85 /* The s- file might have overridden the definition with one that
86 works for the system's C library. But we are using the GNU C
87 library, so this is the right definition for every system. */
89 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
90 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
92 #undef PENDING_OUTPUT_COUNT
93 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
95 #else /* not __GNU_LIBRARY__ */
96 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
97 #include <stdio_ext.h>
98 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
100 #ifndef PENDING_OUTPUT_COUNT
101 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
103 #endif /* not __GNU_LIBRARY__ */
105 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
106 #include <term.h> /* for tgetent */
109 /* Structure to pass dimensions around. Used for character bounding
110 boxes, glyph matrix dimensions and alike. */
119 /* Function prototypes. */
121 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
122 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
123 static void fake_current_matrices
P_ ((Lisp_Object
));
124 static void redraw_overlapping_rows
P_ ((struct window
*, int));
125 static void redraw_overlapped_rows
P_ ((struct window
*, int));
126 static int count_blanks
P_ ((struct glyph
*, int));
127 static int count_match
P_ ((struct glyph
*, struct glyph
*,
128 struct glyph
*, struct glyph
*));
129 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
130 static void update_frame_line
P_ ((struct frame
*, int));
131 static struct dim allocate_matrices_for_frame_redisplay
132 P_ ((Lisp_Object
, int, int, int, int *));
133 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
134 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
135 static void adjust_frame_glyphs
P_ ((struct frame
*));
136 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
137 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
138 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
139 int, int, struct dim
));
140 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
141 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
143 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
145 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
146 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
148 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
150 static struct glyph_pool
*new_glyph_pool
P_ ((void));
151 static void free_glyph_pool
P_ ((struct glyph_pool
*));
152 static void adjust_frame_glyphs_initially
P_ ((void));
153 static void adjust_frame_message_buffer
P_ ((struct frame
*));
154 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
155 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
156 static void build_frame_matrix
P_ ((struct frame
*));
157 void clear_current_matrices
P_ ((struct frame
*));
158 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
160 static void clear_window_matrices
P_ ((struct window
*, int));
161 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
162 static int scrolling_window
P_ ((struct window
*, int));
163 static int update_window_line
P_ ((struct window
*, int, int *));
164 static void update_marginal_area
P_ ((struct window
*, int, int));
165 static int update_text_area
P_ ((struct window
*, int));
166 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
168 static void mirror_make_current
P_ ((struct window
*, int));
169 void check_window_matrix_pointers
P_ ((struct window
*));
171 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
172 struct glyph_matrix
*));
174 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
175 static int update_window_tree
P_ ((struct window
*, int));
176 static int update_window
P_ ((struct window
*, int));
177 static int update_frame_1
P_ ((struct frame
*, int, int));
178 static void set_window_cursor_after_update
P_ ((struct window
*));
179 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
180 struct glyph_row
*, int));
181 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
182 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
183 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
184 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
185 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
186 struct window
*frame_row_to_window
P_ ((struct window
*, int));
189 /* Non-zero means don't pause redisplay for pending input. (This is
190 for debugging and for a future implementation of EDT-like
193 int redisplay_dont_pause
;
195 /* Nonzero upon entry to redisplay means do not assume anything about
196 current contents of actual terminal frame; clear and redraw it. */
200 /* Nonzero means last display completed. Zero means it was preempted. */
202 int display_completed
;
204 /* Lisp variable visible-bell; enables use of screen-flash instead of
209 /* Invert the color of the whole frame, at a low level. */
213 /* Line speed of the terminal. */
217 /* Either nil or a symbol naming the window system under which Emacs
220 Lisp_Object Vwindow_system
;
222 /* Version number of X windows: 10, 11 or nil. */
224 Lisp_Object Vwindow_system_version
;
226 /* Vector of glyph definitions. Indexed by glyph number, the contents
227 are a string which is how to output the glyph.
229 If Vglyph_table is nil, a glyph is output by using its low 8 bits
232 This is an obsolete feature that is no longer used. The variable
233 is retained for compatibility. */
235 Lisp_Object Vglyph_table
;
237 /* Display table to use for vectors that don't specify their own. */
239 Lisp_Object Vstandard_display_table
;
241 /* Nonzero means reading single-character input with prompt so put
242 cursor on mini-buffer after the prompt. Positive means at end of
243 text in echo area; negative means at beginning of line. */
245 int cursor_in_echo_area
;
247 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
250 /* The currently selected frame. In a single-frame version, this
251 variable always equals the_only_frame. */
253 Lisp_Object selected_frame
;
255 /* A frame which is not just a mini-buffer, or 0 if there are no such
256 frames. This is usually the most recent such frame that was
257 selected. In a single-frame version, this variable always holds
258 the address of the_only_frame. */
260 struct frame
*last_nonminibuf_frame
;
262 /* Structure for info on cursor positioning. */
266 /* 1 means SIGWINCH happened when not safe. */
268 int delayed_size_change
;
270 /* 1 means glyph initialization has been completed at startup. */
272 static int glyphs_initialized_initially_p
;
274 /* Updated window if != 0. Set by update_window. */
276 struct window
*updated_window
;
278 /* Glyph row updated in update_window_line, and area that is updated. */
280 struct glyph_row
*updated_row
;
283 /* A glyph for a space. */
285 struct glyph space_glyph
;
287 /* Non-zero means update has been performed directly, so that there's
288 no need for redisplay_internal to do much work. Set by
289 direct_output_for_insert. */
291 int redisplay_performed_directly_p
;
293 /* Counts of allocated structures. These counts serve to diagnose
294 memory leaks and double frees. */
296 int glyph_matrix_count
;
297 int glyph_pool_count
;
299 /* If non-null, the frame whose frame matrices are manipulated. If
300 null, window matrices are worked on. */
302 static struct frame
*frame_matrix_frame
;
304 /* Current interface for window-based redisplay. Set from init_xterm.
305 A null value means we are not using window-based redisplay. */
307 struct redisplay_interface
*rif
;
309 /* Non-zero means that fonts have been loaded since the last glyph
310 matrix adjustments. Redisplay must stop, and glyph matrices must
311 be adjusted when this flag becomes non-zero during display. The
312 reason fonts can be loaded so late is that fonts of fontsets are
317 /* Convert vpos and hpos from frame to window and vice versa.
318 This may only be used for terminal frames. */
322 static int window_to_frame_vpos
P_ ((struct window
*, int));
323 static int window_to_frame_hpos
P_ ((struct window
*, int));
324 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
325 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
327 /* One element of the ring buffer containing redisplay history
330 struct redisplay_history
332 char trace
[512 + 100];
335 /* The size of the history buffer. */
337 #define REDISPLAY_HISTORY_SIZE 30
339 /* The redisplay history buffer. */
341 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
343 /* Next free entry in redisplay_history. */
345 static int history_idx
;
347 /* A tick that's incremented each time something is added to the
350 static unsigned history_tick
;
352 static void add_frame_display_history
P_ ((struct frame
*, int));
353 static void add_window_display_history
P_ ((struct window
*, char *, int));
356 /* Add to the redisplay history how window W has been displayed.
357 MSG is a trace containing the information how W's glyph matrix
358 has been constructed. PAUSED_P non-zero means that the update
359 has been interrupted for pending input. */
362 add_window_display_history (w
, msg
, paused_p
)
369 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
371 buf
= redisplay_history
[history_idx
].trace
;
374 sprintf (buf
, "%d: window %p (`%s')%s\n",
377 ((BUFFERP (w
->buffer
)
378 && STRINGP (XBUFFER (w
->buffer
)->name
))
379 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
381 paused_p
? " ***paused***" : "");
386 /* Add to the redisplay history that frame F has been displayed.
387 PAUSED_P non-zero means that the update has been interrupted for
391 add_frame_display_history (f
, paused_p
)
397 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
399 buf
= redisplay_history
[history_idx
].trace
;
402 sprintf (buf
, "%d: update frame %p%s",
404 f
, paused_p
? " ***paused***" : "");
408 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
409 Sdump_redisplay_history
, 0, 0, "",
410 doc
: /* Dump redisplay history to stderr. */)
415 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
418 i
= REDISPLAY_HISTORY_SIZE
- 1;
419 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
426 #else /* GLYPH_DEBUG == 0 */
428 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
429 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
431 #endif /* GLYPH_DEBUG == 0 */
434 /* Like bcopy except never gets confused by overlap. Let this be the
435 first function defined in this file, or change emacs.c where the
436 address of this function is used. */
439 safe_bcopy (from
, to
, size
)
444 if (size
<= 0 || from
== to
)
447 /* If the source and destination don't overlap, then bcopy can
448 handle it. If they do overlap, but the destination is lower in
449 memory than the source, we'll assume bcopy can handle that. */
450 if (to
< from
|| from
+ size
<= to
)
451 bcopy (from
, to
, size
);
453 /* Otherwise, we'll copy from the end. */
456 register const char *endf
= from
+ size
;
457 register char *endt
= to
+ size
;
459 /* If TO - FROM is large, then we should break the copy into
460 nonoverlapping chunks of TO - FROM bytes each. However, if
461 TO - FROM is small, then the bcopy function call overhead
462 makes this not worth it. The crossover point could be about
463 anywhere. Since I don't think the obvious copy loop is too
464 bad, I'm trying to err in its favor. */
469 while (endf
!= from
);
481 bcopy (endf
, endt
, to
- from
);
484 /* If SIZE wasn't a multiple of TO - FROM, there will be a
485 little left over. The amount left over is (endt + (to -
486 from)) - to, which is endt - from. */
487 bcopy (from
, to
, endt
- from
);
494 /***********************************************************************
496 ***********************************************************************/
498 /* Allocate and return a glyph_matrix structure. POOL is the glyph
499 pool from which memory for the matrix should be allocated, or null
500 for window-based redisplay where no glyph pools are used. The
501 member `pool' of the glyph matrix structure returned is set to
502 POOL, the structure is otherwise zeroed. */
504 struct glyph_matrix
*
505 new_glyph_matrix (pool
)
506 struct glyph_pool
*pool
;
508 struct glyph_matrix
*result
;
510 /* Allocate and clear. */
511 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
512 bzero (result
, sizeof *result
);
514 /* Increment number of allocated matrices. This count is used
515 to detect memory leaks. */
516 ++glyph_matrix_count
;
518 /* Set pool and return. */
524 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
526 The global counter glyph_matrix_count is decremented when a matrix
527 is freed. If the count gets negative, more structures were freed
528 than allocated, i.e. one matrix was freed more than once or a bogus
529 pointer was passed to this function.
531 If MATRIX->pool is null, this means that the matrix manages its own
532 glyph memory---this is done for matrices on X frames. Freeing the
533 matrix also frees the glyph memory in this case. */
536 free_glyph_matrix (matrix
)
537 struct glyph_matrix
*matrix
;
543 /* Detect the case that more matrices are freed than were
545 if (--glyph_matrix_count
< 0)
548 /* Free glyph memory if MATRIX owns it. */
549 if (matrix
->pool
== NULL
)
550 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
551 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
553 /* Free row structures and the matrix itself. */
554 xfree (matrix
->rows
);
560 /* Return the number of glyphs to reserve for a marginal area of
561 window W. TOTAL_GLYPHS is the number of glyphs in a complete
562 display line of window W. MARGIN gives the width of the marginal
563 area in canonical character units. MARGIN should be an integer
567 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
574 if (NUMBERP (margin
))
576 int width
= XFASTINT (w
->total_cols
);
577 double d
= max (0, XFLOATINT (margin
));
578 d
= min (width
/ 2 - 1, d
);
579 n
= (int) ((double) total_glyphs
/ width
* d
);
588 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
591 W is null if the function is called for a frame glyph matrix.
592 Otherwise it is the window MATRIX is a member of. X and Y are the
593 indices of the first column and row of MATRIX within the frame
594 matrix, if such a matrix exists. They are zero for purely
595 window-based redisplay. DIM is the needed size of the matrix.
597 In window-based redisplay, where no frame matrices exist, glyph
598 matrices manage their own glyph storage. Otherwise, they allocate
599 storage from a common frame glyph pool which can be found in
602 The reason for this memory management strategy is to avoid complete
603 frame redraws if possible. When we allocate from a common pool, a
604 change of the location or size of a sub-matrix within the pool
605 requires a complete redisplay of the frame because we cannot easily
606 make sure that the current matrices of all windows still agree with
607 what is displayed on the screen. While this is usually fast, it
608 leads to screen flickering. */
611 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
613 struct glyph_matrix
*matrix
;
619 int marginal_areas_changed_p
= 0;
620 int header_line_changed_p
= 0;
621 int header_line_p
= 0;
622 int left
= -1, right
= -1;
623 int window_width
= -1, window_height
;
625 /* See if W had a header line that has disappeared now, or vice versa.
629 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
631 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
632 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
634 matrix
->header_line_p
= header_line_p
;
636 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
637 Do nothing if MATRIX' size, position, vscroll, and marginal areas
638 haven't changed. This optimization is important because preserving
639 the matrix means preventing redisplay. */
640 if (matrix
->pool
== NULL
)
642 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
643 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
644 xassert (left
>= 0 && right
>= 0);
645 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
646 || right
!= matrix
->right_margin_glyphs
);
648 if (!marginal_areas_changed_p
650 && !header_line_changed_p
651 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
652 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
653 && matrix
->window_height
== window_height
654 && matrix
->window_vscroll
== w
->vscroll
655 && matrix
->window_width
== window_width
)
659 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
660 if (matrix
->rows_allocated
< dim
.height
)
662 int size
= dim
.height
* sizeof (struct glyph_row
);
663 new_rows
= dim
.height
- matrix
->rows_allocated
;
664 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
665 bzero (matrix
->rows
+ matrix
->rows_allocated
,
666 new_rows
* sizeof *matrix
->rows
);
667 matrix
->rows_allocated
= dim
.height
;
672 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
673 on a frame not using window-based redisplay. Set up pointers for
674 each row into the glyph pool. */
677 xassert (matrix
->pool
->glyphs
);
681 left
= margin_glyphs_to_reserve (w
, dim
.width
,
682 w
->left_margin_cols
);
683 right
= margin_glyphs_to_reserve (w
, dim
.width
,
684 w
->right_margin_cols
);
689 for (i
= 0; i
< dim
.height
; ++i
)
691 struct glyph_row
*row
= &matrix
->rows
[i
];
693 row
->glyphs
[LEFT_MARGIN_AREA
]
694 = (matrix
->pool
->glyphs
695 + (y
+ i
) * matrix
->pool
->ncolumns
699 || row
== matrix
->rows
+ dim
.height
- 1
700 || (row
== matrix
->rows
&& matrix
->header_line_p
))
702 row
->glyphs
[TEXT_AREA
]
703 = row
->glyphs
[LEFT_MARGIN_AREA
];
704 row
->glyphs
[RIGHT_MARGIN_AREA
]
705 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
706 row
->glyphs
[LAST_AREA
]
707 = row
->glyphs
[RIGHT_MARGIN_AREA
];
711 row
->glyphs
[TEXT_AREA
]
712 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
713 row
->glyphs
[RIGHT_MARGIN_AREA
]
714 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
715 row
->glyphs
[LAST_AREA
]
716 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
720 matrix
->left_margin_glyphs
= left
;
721 matrix
->right_margin_glyphs
= right
;
725 /* If MATRIX->pool is null, MATRIX is responsible for managing
726 its own memory. It is a window matrix for window-based redisplay.
727 Allocate glyph memory from the heap. */
728 if (dim
.width
> matrix
->matrix_w
730 || header_line_changed_p
731 || marginal_areas_changed_p
)
733 struct glyph_row
*row
= matrix
->rows
;
734 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
738 row
->glyphs
[LEFT_MARGIN_AREA
]
739 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
741 * sizeof (struct glyph
)));
743 /* The mode line never has marginal areas. */
744 if (row
== matrix
->rows
+ dim
.height
- 1
745 || (row
== matrix
->rows
&& matrix
->header_line_p
))
747 row
->glyphs
[TEXT_AREA
]
748 = row
->glyphs
[LEFT_MARGIN_AREA
];
749 row
->glyphs
[RIGHT_MARGIN_AREA
]
750 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
751 row
->glyphs
[LAST_AREA
]
752 = row
->glyphs
[RIGHT_MARGIN_AREA
];
756 row
->glyphs
[TEXT_AREA
]
757 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
758 row
->glyphs
[RIGHT_MARGIN_AREA
]
759 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
760 row
->glyphs
[LAST_AREA
]
761 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
767 xassert (left
>= 0 && right
>= 0);
768 matrix
->left_margin_glyphs
= left
;
769 matrix
->right_margin_glyphs
= right
;
772 /* Number of rows to be used by MATRIX. */
773 matrix
->nrows
= dim
.height
;
774 xassert (matrix
->nrows
>= 0);
778 if (matrix
== w
->current_matrix
)
780 /* Mark rows in a current matrix of a window as not having
781 valid contents. It's important to not do this for
782 desired matrices. When Emacs starts, it may already be
783 building desired matrices when this function runs. */
784 if (window_width
< 0)
785 window_width
= window_box_width (w
, -1);
787 /* Optimize the case that only the height has changed (C-x 2,
788 upper window). Invalidate all rows that are no longer part
790 if (!marginal_areas_changed_p
791 && !header_line_changed_p
793 && dim
.width
== matrix
->matrix_w
794 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
795 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
796 && matrix
->window_width
== window_width
)
798 /* Find the last row in the window. */
799 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
800 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
806 /* Window end is invalid, if inside of the rows that
807 are invalidated below. */
808 if (INTEGERP (w
->window_end_vpos
)
809 && XFASTINT (w
->window_end_vpos
) >= i
)
810 w
->window_end_valid
= Qnil
;
812 while (i
< matrix
->nrows
)
813 matrix
->rows
[i
++].enabled_p
= 0;
817 for (i
= 0; i
< matrix
->nrows
; ++i
)
818 matrix
->rows
[i
].enabled_p
= 0;
821 else if (matrix
== w
->desired_matrix
)
823 /* Rows in desired matrices always have to be cleared;
824 redisplay expects this is the case when it runs, so it
825 had better be the case when we adjust matrices between
827 for (i
= 0; i
< matrix
->nrows
; ++i
)
828 matrix
->rows
[i
].enabled_p
= 0;
833 /* Remember last values to be able to optimize frame redraws. */
834 matrix
->matrix_x
= x
;
835 matrix
->matrix_y
= y
;
836 matrix
->matrix_w
= dim
.width
;
837 matrix
->matrix_h
= dim
.height
;
839 /* Record the top y location and height of W at the time the matrix
840 was last adjusted. This is used to optimize redisplay above. */
843 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
844 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
845 matrix
->window_height
= window_height
;
846 matrix
->window_width
= window_width
;
847 matrix
->window_vscroll
= w
->vscroll
;
852 /* Reverse the contents of rows in MATRIX between START and END. The
853 contents of the row at END - 1 end up at START, END - 2 at START +
854 1 etc. This is part of the implementation of rotate_matrix (see
858 reverse_rows (matrix
, start
, end
)
859 struct glyph_matrix
*matrix
;
864 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
866 /* Non-ISO HP/UX compiler doesn't like auto struct
868 struct glyph_row temp
;
869 temp
= matrix
->rows
[i
];
870 matrix
->rows
[i
] = matrix
->rows
[j
];
871 matrix
->rows
[j
] = temp
;
876 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
877 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
878 indices. (Note: this does not copy glyphs, only glyph pointers in
879 row structures are moved around).
881 The algorithm used for rotating the vector was, I believe, first
882 described by Kernighan. See the vector R as consisting of two
883 sub-vectors AB, where A has length BY for BY >= 0. The result
884 after rotating is then BA. Reverse both sub-vectors to get ArBr
885 and reverse the result to get (ArBr)r which is BA. Similar for
889 rotate_matrix (matrix
, first
, last
, by
)
890 struct glyph_matrix
*matrix
;
895 /* Up (rotate left, i.e. towards lower indices). */
897 reverse_rows (matrix
, first
, first
+ by
);
898 reverse_rows (matrix
, first
+ by
, last
);
899 reverse_rows (matrix
, first
, last
);
903 /* Down (rotate right, i.e. towards higher indices). */
904 reverse_rows (matrix
, last
- by
, last
);
905 reverse_rows (matrix
, first
, last
- by
);
906 reverse_rows (matrix
, first
, last
);
911 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
912 with indices START <= index < END. Increment positions by DELTA/
916 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
917 struct glyph_matrix
*matrix
;
918 int start
, end
, delta
, delta_bytes
;
920 /* Check that START and END are reasonable values. */
921 xassert (start
>= 0 && start
<= matrix
->nrows
);
922 xassert (end
>= 0 && end
<= matrix
->nrows
);
923 xassert (start
<= end
);
925 for (; start
< end
; ++start
)
926 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
930 /* Enable a range of rows in glyph matrix MATRIX. START and END are
931 the row indices of the first and last + 1 row to enable. If
932 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
935 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
936 struct glyph_matrix
*matrix
;
940 xassert (start
<= end
);
941 xassert (start
>= 0 && start
< matrix
->nrows
);
942 xassert (end
>= 0 && end
<= matrix
->nrows
);
944 for (; start
< end
; ++start
)
945 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
951 This empties all rows in MATRIX by setting the enabled_p flag for
952 all rows of the matrix to zero. The function prepare_desired_row
953 will eventually really clear a row when it sees one with a zero
956 Resets update hints to defaults value. The only update hint
957 currently present is the flag MATRIX->no_scrolling_p. */
960 clear_glyph_matrix (matrix
)
961 struct glyph_matrix
*matrix
;
965 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
966 matrix
->no_scrolling_p
= 0;
971 /* Shift part of the glyph matrix MATRIX of window W up or down.
972 Increment y-positions in glyph rows between START and END by DY,
973 and recompute their visible height. */
976 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
978 struct glyph_matrix
*matrix
;
983 xassert (start
<= end
);
984 xassert (start
>= 0 && start
< matrix
->nrows
);
985 xassert (end
>= 0 && end
<= matrix
->nrows
);
987 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
988 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
990 for (; start
< end
; ++start
)
992 struct glyph_row
*row
= &matrix
->rows
[start
];
995 row
->visible_height
= row
->height
;
998 row
->visible_height
-= min_y
- row
->y
;
999 if (row
->y
+ row
->height
> max_y
)
1000 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1005 /* Mark all rows in current matrices of frame F as invalid. Marking
1006 invalid is done by setting enabled_p to zero for all rows in a
1010 clear_current_matrices (f
)
1011 register struct frame
*f
;
1013 /* Clear frame current matrix, if we have one. */
1014 if (f
->current_matrix
)
1015 clear_glyph_matrix (f
->current_matrix
);
1017 /* Clear the matrix of the menu bar window, if such a window exists.
1018 The menu bar window is currently used to display menus on X when
1019 no toolkit support is compiled in. */
1020 if (WINDOWP (f
->menu_bar_window
))
1021 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1023 /* Clear the matrix of the tool-bar window, if any. */
1024 if (WINDOWP (f
->tool_bar_window
))
1025 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1027 /* Clear current window matrices. */
1028 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1029 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1033 /* Clear out all display lines of F for a coming redisplay. */
1036 clear_desired_matrices (f
)
1037 register struct frame
*f
;
1039 if (f
->desired_matrix
)
1040 clear_glyph_matrix (f
->desired_matrix
);
1042 if (WINDOWP (f
->menu_bar_window
))
1043 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1045 if (WINDOWP (f
->tool_bar_window
))
1046 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1048 /* Do it for window matrices. */
1049 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1050 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1054 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1055 non-zero clear desired matrices, otherwise clear current matrices. */
1058 clear_window_matrices (w
, desired_p
)
1064 if (!NILP (w
->hchild
))
1066 xassert (WINDOWP (w
->hchild
));
1067 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1069 else if (!NILP (w
->vchild
))
1071 xassert (WINDOWP (w
->vchild
));
1072 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1077 clear_glyph_matrix (w
->desired_matrix
);
1080 clear_glyph_matrix (w
->current_matrix
);
1081 w
->window_end_valid
= Qnil
;
1085 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1091 /***********************************************************************
1094 See dispextern.h for an overall explanation of glyph rows.
1095 ***********************************************************************/
1097 /* Clear glyph row ROW. Do it in a way that makes it robust against
1098 changes in the glyph_row structure, i.e. addition or removal of
1099 structure members. */
1101 static struct glyph_row null_row
;
1104 clear_glyph_row (row
)
1105 struct glyph_row
*row
;
1107 struct glyph
*p
[1 + LAST_AREA
];
1109 /* Save pointers. */
1110 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1111 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1112 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1113 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1118 /* Restore pointers. */
1119 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1120 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1121 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1122 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1124 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1125 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1126 Redisplay outputs such glyphs, and flickering effects were
1127 the result. This also depended on the contents of memory
1128 returned by xmalloc. If flickering happens again, activate
1129 the code below. If the flickering is gone with that, chances
1130 are that the flickering has the same reason as here. */
1131 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1136 /* Make ROW an empty, enabled row of canonical character height,
1137 in window W starting at y-position Y. */
1140 blank_row (w
, row
, y
)
1142 struct glyph_row
*row
;
1147 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1148 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1150 clear_glyph_row (row
);
1152 row
->ascent
= row
->phys_ascent
= 0;
1153 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1154 row
->visible_height
= row
->height
;
1157 row
->visible_height
-= min_y
- row
->y
;
1158 if (row
->y
+ row
->height
> max_y
)
1159 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1165 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1166 are the amounts by which to change positions. Note that the first
1167 glyph of the text area of a row can have a buffer position even if
1168 the used count of the text area is zero. Such rows display line
1172 increment_row_positions (row
, delta
, delta_bytes
)
1173 struct glyph_row
*row
;
1174 int delta
, delta_bytes
;
1178 /* Increment start and end positions. */
1179 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1180 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1181 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1182 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1184 /* Increment positions in glyphs. */
1185 for (area
= 0; area
< LAST_AREA
; ++area
)
1186 for (i
= 0; i
< row
->used
[area
]; ++i
)
1187 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1188 && row
->glyphs
[area
][i
].charpos
> 0)
1189 row
->glyphs
[area
][i
].charpos
+= delta
;
1191 /* Capture the case of rows displaying a line end. */
1192 if (row
->used
[TEXT_AREA
] == 0
1193 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1194 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1199 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1200 contents, i.e. glyph structure contents are exchanged between A and
1201 B without changing glyph pointers in A and B. */
1204 swap_glyphs_in_rows (a
, b
)
1205 struct glyph_row
*a
, *b
;
1209 for (area
= 0; area
< LAST_AREA
; ++area
)
1211 /* Number of glyphs to swap. */
1212 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1214 /* Start of glyphs in area of row A. */
1215 struct glyph
*glyph_a
= a
->glyphs
[area
];
1217 /* End + 1 of glyphs in area of row A. */
1218 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1220 /* Start of glyphs in area of row B. */
1221 struct glyph
*glyph_b
= b
->glyphs
[area
];
1223 while (glyph_a
< glyph_a_end
)
1225 /* Non-ISO HP/UX compiler doesn't like auto struct
1229 *glyph_a
= *glyph_b
;
1239 /* Exchange pointers to glyph memory between glyph rows A and B. */
1242 swap_glyph_pointers (a
, b
)
1243 struct glyph_row
*a
, *b
;
1246 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1248 struct glyph
*temp
= a
->glyphs
[i
];
1249 a
->glyphs
[i
] = b
->glyphs
[i
];
1250 b
->glyphs
[i
] = temp
;
1255 /* Copy glyph row structure FROM to glyph row structure TO, except
1256 that glyph pointers in the structures are left unchanged. */
1259 copy_row_except_pointers (to
, from
)
1260 struct glyph_row
*to
, *from
;
1262 struct glyph
*pointers
[1 + LAST_AREA
];
1264 /* Save glyph pointers of TO. */
1265 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1267 /* Do a structure assignment. */
1270 /* Restore original pointers of TO. */
1271 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1275 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1276 TO and FROM are left unchanged. Glyph contents are copied from the
1277 glyph memory of FROM to the glyph memory of TO. Increment buffer
1278 positions in row TO by DELTA/ DELTA_BYTES. */
1281 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1282 struct glyph_row
*to
, *from
;
1283 int delta
, delta_bytes
;
1287 /* This is like a structure assignment TO = FROM, except that
1288 glyph pointers in the rows are left unchanged. */
1289 copy_row_except_pointers (to
, from
);
1291 /* Copy glyphs from FROM to TO. */
1292 for (area
= 0; area
< LAST_AREA
; ++area
)
1293 if (from
->used
[area
])
1294 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1295 from
->used
[area
] * sizeof (struct glyph
));
1297 /* Increment buffer positions in TO by DELTA. */
1298 increment_row_positions (to
, delta
, delta_bytes
);
1302 /* Assign glyph row FROM to glyph row TO. This works like a structure
1303 assignment TO = FROM, except that glyph pointers are not copied but
1304 exchanged between TO and FROM. Pointers must be exchanged to avoid
1308 assign_row (to
, from
)
1309 struct glyph_row
*to
, *from
;
1311 swap_glyph_pointers (to
, from
);
1312 copy_row_except_pointers (to
, from
);
1316 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1317 a row in a window matrix, is a slice of the glyph memory of the
1318 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1319 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1320 memory of FRAME_ROW. */
1325 glyph_row_slice_p (window_row
, frame_row
)
1326 struct glyph_row
*window_row
, *frame_row
;
1328 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1329 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1330 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1332 return (frame_glyph_start
<= window_glyph_start
1333 && window_glyph_start
< frame_glyph_end
);
1336 #endif /* GLYPH_DEBUG */
1340 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1341 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1342 in WINDOW_MATRIX is found satisfying the condition. */
1344 static struct glyph_row
*
1345 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1346 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1351 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1353 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1354 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1355 frame_matrix
->rows
+ row
))
1358 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1363 /* Prepare ROW for display. Desired rows are cleared lazily,
1364 i.e. they are only marked as to be cleared by setting their
1365 enabled_p flag to zero. When a row is to be displayed, a prior
1366 call to this function really clears it. */
1369 prepare_desired_row (row
)
1370 struct glyph_row
*row
;
1372 if (!row
->enabled_p
)
1374 clear_glyph_row (row
);
1380 /* Return a hash code for glyph row ROW. */
1383 line_hash_code (row
)
1384 struct glyph_row
*row
;
1390 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1391 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1395 int c
= glyph
->u
.ch
;
1396 int face_id
= glyph
->face_id
;
1397 if (TTY_MUST_WRITE_SPACES (CURTTY ()))
1399 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1400 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1412 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1413 the number of characters in the line. If must_write_spaces is
1414 zero, leading and trailing spaces are ignored. */
1417 line_draw_cost (matrix
, vpos
)
1418 struct glyph_matrix
*matrix
;
1421 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1422 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1423 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1425 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1426 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1428 /* Ignore trailing and leading spaces if we can. */
1429 if (!TTY_MUST_WRITE_SPACES (CURTTY ()))
1431 /* Skip from the end over trailing spaces. */
1432 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1435 /* All blank line. */
1439 /* Skip over leading spaces. */
1440 while (CHAR_GLYPH_SPACE_P (*beg
))
1444 /* If we don't have a glyph-table, each glyph is one character,
1445 so return the number of glyphs. */
1446 if (glyph_table_base
== 0)
1450 /* Otherwise, scan the glyphs and accumulate their total length
1455 GLYPH g
= GLYPH_FROM_CHAR_GLYPH (*beg
);
1458 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1461 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1471 /* Test two glyph rows A and B for equality. Value is non-zero if A
1472 and B have equal contents. W is the window to which the glyphs
1473 rows A and B belong. It is needed here to test for partial row
1474 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1475 flags of A and B, too. */
1478 row_equal_p (w
, a
, b
, mouse_face_p
)
1480 struct glyph_row
*a
, *b
;
1485 else if (a
->hash
!= b
->hash
)
1489 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1492 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1495 /* Compare glyphs. */
1496 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1498 if (a
->used
[area
] != b
->used
[area
])
1501 a_glyph
= a
->glyphs
[area
];
1502 a_end
= a_glyph
+ a
->used
[area
];
1503 b_glyph
= b
->glyphs
[area
];
1505 while (a_glyph
< a_end
1506 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1507 ++a_glyph
, ++b_glyph
;
1509 if (a_glyph
!= a_end
)
1513 if (a
->truncated_on_left_p
!= b
->truncated_on_left_p
1514 || a
->fill_line_p
!= b
->fill_line_p
1515 || a
->truncated_on_right_p
!= b
->truncated_on_right_p
1516 || a
->overlay_arrow_p
!= b
->overlay_arrow_p
1517 || a
->continued_p
!= b
->continued_p
1518 || a
->indicate_empty_line_p
!= b
->indicate_empty_line_p
1519 || a
->overlapped_p
!= b
->overlapped_p
1520 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1521 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1522 /* Different partially visible characters on left margin. */
1524 /* Different height. */
1525 || a
->ascent
!= b
->ascent
1526 || a
->phys_ascent
!= b
->phys_ascent
1527 || a
->phys_height
!= b
->phys_height
1528 || a
->visible_height
!= b
->visible_height
)
1537 /***********************************************************************
1540 See dispextern.h for an overall explanation of glyph pools.
1541 ***********************************************************************/
1543 /* Allocate a glyph_pool structure. The structure returned is
1544 initialized with zeros. The global variable glyph_pool_count is
1545 incremented for each pool allocated. */
1547 static struct glyph_pool
*
1550 struct glyph_pool
*result
;
1552 /* Allocate a new glyph_pool and clear it. */
1553 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1554 bzero (result
, sizeof *result
);
1556 /* For memory leak and double deletion checking. */
1563 /* Free a glyph_pool structure POOL. The function may be called with
1564 a null POOL pointer. The global variable glyph_pool_count is
1565 decremented with every pool structure freed. If this count gets
1566 negative, more structures were freed than allocated, i.e. one
1567 structure must have been freed more than once or a bogus pointer
1568 was passed to free_glyph_pool. */
1571 free_glyph_pool (pool
)
1572 struct glyph_pool
*pool
;
1576 /* More freed than allocated? */
1578 xassert (glyph_pool_count
>= 0);
1580 xfree (pool
->glyphs
);
1586 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1587 columns we need. This function never shrinks a pool. The only
1588 case in which this would make sense, would be when a frame's size
1589 is changed from a large value to a smaller one. But, if someone
1590 does it once, we can expect that he will do it again.
1592 Value is non-zero if the pool changed in a way which makes
1593 re-adjusting window glyph matrices necessary. */
1596 realloc_glyph_pool (pool
, matrix_dim
)
1597 struct glyph_pool
*pool
;
1598 struct dim matrix_dim
;
1603 changed_p
= (pool
->glyphs
== 0
1604 || matrix_dim
.height
!= pool
->nrows
1605 || matrix_dim
.width
!= pool
->ncolumns
);
1607 /* Enlarge the glyph pool. */
1608 needed
= matrix_dim
.width
* matrix_dim
.height
;
1609 if (needed
> pool
->nglyphs
)
1611 int size
= needed
* sizeof (struct glyph
);
1614 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1617 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1618 bzero (pool
->glyphs
, size
);
1621 pool
->nglyphs
= needed
;
1624 /* Remember the number of rows and columns because (a) we use them
1625 to do sanity checks, and (b) the number of columns determines
1626 where rows in the frame matrix start---this must be available to
1627 determine pointers to rows of window sub-matrices. */
1628 pool
->nrows
= matrix_dim
.height
;
1629 pool
->ncolumns
= matrix_dim
.width
;
1636 /***********************************************************************
1638 ***********************************************************************/
1643 /* Flush standard output. This is sometimes useful to call from the debugger.
1644 XXX Maybe this should be changed to flush the current terminal instead of
1655 /* Check that no glyph pointers have been lost in MATRIX. If a
1656 pointer has been lost, e.g. by using a structure assignment between
1657 rows, at least one pointer must occur more than once in the rows of
1661 check_matrix_pointer_lossage (matrix
)
1662 struct glyph_matrix
*matrix
;
1666 for (i
= 0; i
< matrix
->nrows
; ++i
)
1667 for (j
= 0; j
< matrix
->nrows
; ++j
)
1669 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1670 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1674 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1677 matrix_row (matrix
, row
)
1678 struct glyph_matrix
*matrix
;
1681 xassert (matrix
&& matrix
->rows
);
1682 xassert (row
>= 0 && row
< matrix
->nrows
);
1684 /* That's really too slow for normal testing because this function
1685 is called almost everywhere. Although---it's still astonishingly
1686 fast, so it is valuable to have for debugging purposes. */
1688 check_matrix_pointer_lossage (matrix
);
1691 return matrix
->rows
+ row
;
1695 #if 0 /* This function makes invalid assumptions when text is
1696 partially invisible. But it might come handy for debugging
1699 /* Check invariants that must hold for an up to date current matrix of
1703 check_matrix_invariants (w
)
1706 struct glyph_matrix
*matrix
= w
->current_matrix
;
1707 int yb
= window_text_bottom_y (w
);
1708 struct glyph_row
*row
= matrix
->rows
;
1709 struct glyph_row
*last_text_row
= NULL
;
1710 struct buffer
*saved
= current_buffer
;
1711 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1714 /* This can sometimes happen for a fresh window. */
1715 if (matrix
->nrows
< 2)
1718 set_buffer_temp (buffer
);
1720 /* Note: last row is always reserved for the mode line. */
1721 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1722 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1724 struct glyph_row
*next
= row
+ 1;
1726 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1727 last_text_row
= row
;
1729 /* Check that character and byte positions are in sync. */
1730 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1731 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1733 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1734 have such a position temporarily in case of a minibuffer
1735 displaying something like `[Sole completion]' at its end. */
1736 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1737 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1738 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1740 /* Check that end position of `row' is equal to start position
1742 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1744 xassert (MATRIX_ROW_END_CHARPOS (row
)
1745 == MATRIX_ROW_START_CHARPOS (next
));
1746 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1747 == MATRIX_ROW_START_BYTEPOS (next
));
1752 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1753 xassert (w
->desired_matrix
->rows
!= NULL
);
1754 set_buffer_temp (saved
);
1759 #endif /* GLYPH_DEBUG != 0 */
1763 /**********************************************************************
1764 Allocating/ Adjusting Glyph Matrices
1765 **********************************************************************/
1767 /* Allocate glyph matrices over a window tree for a frame-based
1770 X and Y are column/row within the frame glyph matrix where
1771 sub-matrices for the window tree rooted at WINDOW must be
1772 allocated. CH_DIM contains the dimensions of the smallest
1773 character that could be used during display. DIM_ONLY_P non-zero
1774 means that the caller of this function is only interested in the
1775 result matrix dimension, and matrix adjustments should not be
1778 The function returns the total width/height of the sub-matrices of
1779 the window tree. If called on a frame root window, the computation
1780 will take the mini-buffer window into account.
1782 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1784 NEW_LEAF_MATRIX set if any window in the tree did not have a
1785 glyph matrices yet, and
1787 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1788 any window in the tree will be changed or have been changed (see
1791 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1794 Windows are arranged into chains of windows on the same level
1795 through the next fields of window structures. Such a level can be
1796 either a sequence of horizontally adjacent windows from left to
1797 right, or a sequence of vertically adjacent windows from top to
1798 bottom. Each window in a horizontal sequence can be either a leaf
1799 window or a vertical sequence; a window in a vertical sequence can
1800 be either a leaf or a horizontal sequence. All windows in a
1801 horizontal sequence have the same height, and all windows in a
1802 vertical sequence have the same width.
1804 This function uses, for historical reasons, a more general
1805 algorithm to determine glyph matrix dimensions that would be
1808 The matrix height of a horizontal sequence is determined by the
1809 maximum height of any matrix in the sequence. The matrix width of
1810 a horizontal sequence is computed by adding up matrix widths of
1811 windows in the sequence.
1813 |<------- result width ------->|
1814 +---------+----------+---------+ ---
1817 +---------+ | | result height
1822 The matrix width of a vertical sequence is the maximum matrix width
1823 of any window in the sequence. Its height is computed by adding up
1824 matrix heights of windows in the sequence.
1826 |<---- result width -->|
1834 +------------+---------+ |
1837 +------------+---------+ --- */
1839 /* Bit indicating that a new matrix will be allocated or has been
1842 #define NEW_LEAF_MATRIX (1 << 0)
1844 /* Bit indicating that a matrix will or has changed its location or
1847 #define CHANGED_LEAF_MATRIX (1 << 1)
1850 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1851 window_change_flags
)
1855 int *window_change_flags
;
1857 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1859 int wmax
= 0, hmax
= 0;
1863 int in_horz_combination_p
;
1865 /* What combination is WINDOW part of? Compute this once since the
1866 result is the same for all windows in the `next' chain. The
1867 special case of a root window (parent equal to nil) is treated
1868 like a vertical combination because a root window's `next'
1869 points to the mini-buffer window, if any, which is arranged
1870 vertically below other windows. */
1871 in_horz_combination_p
1872 = (!NILP (XWINDOW (window
)->parent
)
1873 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1875 /* For WINDOW and all windows on the same level. */
1878 w
= XWINDOW (window
);
1880 /* Get the dimension of the window sub-matrix for W, depending
1881 on whether this is a combination or a leaf window. */
1882 if (!NILP (w
->hchild
))
1883 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1885 window_change_flags
);
1886 else if (!NILP (w
->vchild
))
1887 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1889 window_change_flags
);
1892 /* If not already done, allocate sub-matrix structures. */
1893 if (w
->desired_matrix
== NULL
)
1895 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1896 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1897 *window_change_flags
|= NEW_LEAF_MATRIX
;
1900 /* Width and height MUST be chosen so that there are no
1901 holes in the frame matrix. */
1902 dim
.width
= required_matrix_width (w
);
1903 dim
.height
= required_matrix_height (w
);
1905 /* Will matrix be re-allocated? */
1906 if (x
!= w
->desired_matrix
->matrix_x
1907 || y
!= w
->desired_matrix
->matrix_y
1908 || dim
.width
!= w
->desired_matrix
->matrix_w
1909 || dim
.height
!= w
->desired_matrix
->matrix_h
1910 || (margin_glyphs_to_reserve (w
, dim
.width
,
1911 w
->right_margin_cols
)
1912 != w
->desired_matrix
->left_margin_glyphs
)
1913 || (margin_glyphs_to_reserve (w
, dim
.width
,
1914 w
->left_margin_cols
)
1915 != w
->desired_matrix
->right_margin_glyphs
))
1916 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1918 /* Actually change matrices, if allowed. Do not consider
1919 CHANGED_LEAF_MATRIX computed above here because the pool
1920 may have been changed which we don't now here. We trust
1921 that we only will be called with DIM_ONLY_P != 0 when
1925 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1926 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1930 /* If we are part of a horizontal combination, advance x for
1931 windows to the right of W; otherwise advance y for windows
1933 if (in_horz_combination_p
)
1938 /* Remember maximum glyph matrix dimensions. */
1939 wmax
= max (wmax
, dim
.width
);
1940 hmax
= max (hmax
, dim
.height
);
1942 /* Next window on same level. */
1945 while (!NILP (window
));
1947 /* Set `total' to the total glyph matrix dimension of this window
1948 level. In a vertical combination, the width is the width of the
1949 widest window; the height is the y we finally reached, corrected
1950 by the y we started with. In a horizontal combination, the total
1951 height is the height of the tallest window, and the width is the
1952 x we finally reached, corrected by the x we started with. */
1953 if (in_horz_combination_p
)
1955 total
.width
= x
- x0
;
1956 total
.height
= hmax
;
1961 total
.height
= y
- y0
;
1968 /* Return the required height of glyph matrices for window W. */
1971 required_matrix_height (w
)
1974 #ifdef HAVE_WINDOW_SYSTEM
1975 struct frame
*f
= XFRAME (w
->frame
);
1977 if (FRAME_WINDOW_P (f
))
1979 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1980 int window_pixel_height
= window_box_height (w
) + abs (w
->vscroll
);
1981 return (((window_pixel_height
+ ch_height
- 1)
1983 /* One partially visible line at the top and
1984 bottom of the window. */
1986 /* 2 for header and mode line. */
1989 #endif /* HAVE_WINDOW_SYSTEM */
1991 return WINDOW_TOTAL_LINES (w
);
1995 /* Return the required width of glyph matrices for window W. */
1998 required_matrix_width (w
)
2001 #ifdef HAVE_WINDOW_SYSTEM
2002 struct frame
*f
= XFRAME (w
->frame
);
2003 if (FRAME_WINDOW_P (f
))
2005 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2006 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2008 /* Compute number of glyphs needed in a glyph row. */
2009 return (((window_pixel_width
+ ch_width
- 1)
2011 /* 2 partially visible columns in the text area. */
2013 /* One partially visible column at the right
2014 edge of each marginal area. */
2017 #endif /* HAVE_WINDOW_SYSTEM */
2019 return XINT (w
->total_cols
);
2023 /* Allocate window matrices for window-based redisplay. W is the
2024 window whose matrices must be allocated/reallocated. CH_DIM is the
2025 size of the smallest character that could potentially be used on W. */
2028 allocate_matrices_for_window_redisplay (w
)
2033 if (!NILP (w
->vchild
))
2034 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2035 else if (!NILP (w
->hchild
))
2036 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2039 /* W is a leaf window. */
2042 /* If matrices are not yet allocated, allocate them now. */
2043 if (w
->desired_matrix
== NULL
)
2045 w
->desired_matrix
= new_glyph_matrix (NULL
);
2046 w
->current_matrix
= new_glyph_matrix (NULL
);
2049 dim
.width
= required_matrix_width (w
);
2050 dim
.height
= required_matrix_height (w
);
2051 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2052 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2055 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2060 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2061 do it for all frames; otherwise do it just for the given frame.
2062 This function must be called when a new frame is created, its size
2063 changes, or its window configuration changes. */
2069 /* Block input so that expose events and other events that access
2070 glyph matrices are not processed while we are changing them. */
2074 adjust_frame_glyphs (f
);
2077 Lisp_Object tail
, lisp_frame
;
2079 FOR_EACH_FRAME (tail
, lisp_frame
)
2080 adjust_frame_glyphs (XFRAME (lisp_frame
));
2087 /* Adjust frame glyphs when Emacs is initialized.
2089 To be called from init_display.
2091 We need a glyph matrix because redraw will happen soon.
2092 Unfortunately, window sizes on selected_frame are not yet set to
2093 meaningful values. I believe we can assume that there are only two
2094 windows on the frame---the mini-buffer and the root window. Frame
2095 height and width seem to be correct so far. So, set the sizes of
2096 windows to estimated values. */
2099 adjust_frame_glyphs_initially ()
2101 struct frame
*sf
= SELECTED_FRAME ();
2102 struct window
*root
= XWINDOW (sf
->root_window
);
2103 struct window
*mini
= XWINDOW (root
->next
);
2104 int frame_lines
= FRAME_LINES (sf
);
2105 int frame_cols
= FRAME_COLS (sf
);
2106 int top_margin
= FRAME_TOP_MARGIN (sf
);
2108 /* Do it for the root window. */
2109 XSETFASTINT (root
->top_line
, top_margin
);
2110 XSETFASTINT (root
->total_cols
, frame_cols
);
2111 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2113 /* Do it for the mini-buffer window. */
2114 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2115 XSETFASTINT (mini
->total_cols
, frame_cols
);
2116 set_window_height (root
->next
, 1, 0);
2118 adjust_frame_glyphs (sf
);
2119 glyphs_initialized_initially_p
= 1;
2123 /* Allocate/reallocate glyph matrices of a single frame F. */
2126 adjust_frame_glyphs (f
)
2129 if (FRAME_WINDOW_P (f
))
2130 adjust_frame_glyphs_for_window_redisplay (f
);
2132 adjust_frame_glyphs_for_frame_redisplay (f
);
2134 /* Don't forget the message buffer and the buffer for
2135 decode_mode_spec. */
2136 adjust_frame_message_buffer (f
);
2137 adjust_decode_mode_spec_buffer (f
);
2139 f
->glyphs_initialized_p
= 1;
2143 /* In the window tree with root W, build current matrices of leaf
2144 windows from the frame's current matrix. */
2147 fake_current_matrices (window
)
2152 for (; !NILP (window
); window
= w
->next
)
2154 w
= XWINDOW (window
);
2156 if (!NILP (w
->hchild
))
2157 fake_current_matrices (w
->hchild
);
2158 else if (!NILP (w
->vchild
))
2159 fake_current_matrices (w
->vchild
);
2163 struct frame
*f
= XFRAME (w
->frame
);
2164 struct glyph_matrix
*m
= w
->current_matrix
;
2165 struct glyph_matrix
*fm
= f
->current_matrix
;
2167 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2168 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2170 for (i
= 0; i
< m
->matrix_h
; ++i
)
2172 struct glyph_row
*r
= m
->rows
+ i
;
2173 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2175 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2176 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2178 r
->enabled_p
= fr
->enabled_p
;
2181 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2182 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2183 r
->used
[TEXT_AREA
] = (m
->matrix_w
2184 - r
->used
[LEFT_MARGIN_AREA
]
2185 - r
->used
[RIGHT_MARGIN_AREA
]);
2194 /* Save away the contents of frame F's current frame matrix. Value is
2195 a glyph matrix holding the contents of F's current frame matrix. */
2197 static struct glyph_matrix
*
2198 save_current_matrix (f
)
2202 struct glyph_matrix
*saved
;
2204 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2205 bzero (saved
, sizeof *saved
);
2206 saved
->nrows
= f
->current_matrix
->nrows
;
2207 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2208 * sizeof *saved
->rows
);
2209 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2211 for (i
= 0; i
< saved
->nrows
; ++i
)
2213 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2214 struct glyph_row
*to
= saved
->rows
+ i
;
2215 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2216 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2217 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2218 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2225 /* Restore the contents of frame F's current frame matrix from SAVED,
2226 and free memory associated with SAVED. */
2229 restore_current_matrix (f
, saved
)
2231 struct glyph_matrix
*saved
;
2235 for (i
= 0; i
< saved
->nrows
; ++i
)
2237 struct glyph_row
*from
= saved
->rows
+ i
;
2238 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2239 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2240 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2241 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2242 xfree (from
->glyphs
[TEXT_AREA
]);
2245 xfree (saved
->rows
);
2251 /* Allocate/reallocate glyph matrices of a single frame F for
2252 frame-based redisplay. */
2255 adjust_frame_glyphs_for_frame_redisplay (f
)
2259 struct dim matrix_dim
;
2261 int window_change_flags
;
2264 if (!FRAME_LIVE_P (f
))
2267 /* Determine the smallest character in any font for F. On
2268 console windows, all characters have dimension (1, 1). */
2269 ch_dim
.width
= ch_dim
.height
= 1;
2271 top_window_y
= FRAME_TOP_MARGIN (f
);
2273 /* Allocate glyph pool structures if not already done. */
2274 if (f
->desired_pool
== NULL
)
2276 f
->desired_pool
= new_glyph_pool ();
2277 f
->current_pool
= new_glyph_pool ();
2280 /* Allocate frames matrix structures if needed. */
2281 if (f
->desired_matrix
== NULL
)
2283 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2284 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2287 /* Compute window glyph matrices. (This takes the mini-buffer
2288 window into account). The result is the size of the frame glyph
2289 matrix needed. The variable window_change_flags is set to a bit
2290 mask indicating whether new matrices will be allocated or
2291 existing matrices change their size or location within the frame
2293 window_change_flags
= 0;
2295 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2298 &window_change_flags
);
2300 /* Add in menu bar lines, if any. */
2301 matrix_dim
.height
+= top_window_y
;
2303 /* Enlarge pools as necessary. */
2304 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2305 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2307 /* Set up glyph pointers within window matrices. Do this only if
2308 absolutely necessary since it requires a frame redraw. */
2309 if (pool_changed_p
|| window_change_flags
)
2311 /* Do it for window matrices. */
2312 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2314 &window_change_flags
);
2316 /* Size of frame matrices must equal size of frame. Note
2317 that we are called for X frames with window widths NOT equal
2318 to the frame width (from CHANGE_FRAME_SIZE_1). */
2319 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2320 && matrix_dim
.height
== FRAME_LINES (f
));
2322 /* Pointers to glyph memory in glyph rows are exchanged during
2323 the update phase of redisplay, which means in general that a
2324 frame's current matrix consists of pointers into both the
2325 desired and current glyph pool of the frame. Adjusting a
2326 matrix sets the frame matrix up so that pointers are all into
2327 the same pool. If we want to preserve glyph contents of the
2328 current matrix over a call to adjust_glyph_matrix, we must
2329 make a copy of the current glyphs, and restore the current
2330 matrix' contents from that copy. */
2331 if (display_completed
2332 && !FRAME_GARBAGED_P (f
)
2333 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2334 && matrix_dim
.height
== f
->current_matrix
->matrix_h
)
2336 struct glyph_matrix
*copy
= save_current_matrix (f
);
2337 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2338 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2339 restore_current_matrix (f
, copy
);
2340 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2344 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2345 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2346 SET_FRAME_GARBAGED (f
);
2352 /* Allocate/reallocate glyph matrices of a single frame F for
2353 window-based redisplay. */
2356 adjust_frame_glyphs_for_window_redisplay (f
)
2362 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2364 /* Get minimum sizes. */
2365 #ifdef HAVE_WINDOW_SYSTEM
2366 ch_dim
.width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2367 ch_dim
.height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
2369 ch_dim
.width
= ch_dim
.height
= 1;
2372 /* Allocate/reallocate window matrices. */
2373 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2375 /* Allocate/ reallocate matrices of the dummy window used to display
2376 the menu bar under X when no X toolkit support is available. */
2377 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2379 /* Allocate a dummy window if not already done. */
2380 if (NILP (f
->menu_bar_window
))
2382 f
->menu_bar_window
= make_window ();
2383 w
= XWINDOW (f
->menu_bar_window
);
2384 XSETFRAME (w
->frame
, f
);
2385 w
->pseudo_window_p
= 1;
2388 w
= XWINDOW (f
->menu_bar_window
);
2390 /* Set window dimensions to frame dimensions and allocate or
2391 adjust glyph matrices of W. */
2392 XSETFASTINT (w
->top_line
, 0);
2393 XSETFASTINT (w
->left_col
, 0);
2394 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2395 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2396 allocate_matrices_for_window_redisplay (w
);
2398 #endif /* not USE_X_TOOLKIT */
2401 /* Allocate/ reallocate matrices of the tool bar window. If we
2402 don't have a tool bar window yet, make one. */
2403 if (NILP (f
->tool_bar_window
))
2405 f
->tool_bar_window
= make_window ();
2406 w
= XWINDOW (f
->tool_bar_window
);
2407 XSETFRAME (w
->frame
, f
);
2408 w
->pseudo_window_p
= 1;
2411 w
= XWINDOW (f
->tool_bar_window
);
2413 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2414 XSETFASTINT (w
->left_col
, 0);
2415 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2416 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2417 allocate_matrices_for_window_redisplay (w
);
2422 /* Adjust/ allocate message buffer of frame F.
2424 Note that the message buffer is never freed. Since I could not
2425 find a free in 19.34, I assume that freeing it would be
2426 problematic in some way and don't do it either.
2428 (Implementation note: It should be checked if we can free it
2429 eventually without causing trouble). */
2432 adjust_frame_message_buffer (f
)
2435 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2437 if (FRAME_MESSAGE_BUF (f
))
2439 char *buffer
= FRAME_MESSAGE_BUF (f
);
2440 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2441 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2444 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2448 /* Re-allocate buffer for decode_mode_spec on frame F. */
2451 adjust_decode_mode_spec_buffer (f
)
2454 f
->decode_mode_spec_buffer
2455 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2456 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2461 /**********************************************************************
2462 Freeing Glyph Matrices
2463 **********************************************************************/
2465 /* Free glyph memory for a frame F. F may be null. This function can
2466 be called for the same frame more than once. The root window of
2467 F may be nil when this function is called. This is the case when
2468 the function is called when F is destroyed. */
2474 if (f
&& f
->glyphs_initialized_p
)
2476 /* Block interrupt input so that we don't get surprised by an X
2477 event while we're in an inconsistent state. */
2479 f
->glyphs_initialized_p
= 0;
2481 /* Release window sub-matrices. */
2482 if (!NILP (f
->root_window
))
2483 free_window_matrices (XWINDOW (f
->root_window
));
2485 /* Free the dummy window for menu bars without X toolkit and its
2487 if (!NILP (f
->menu_bar_window
))
2489 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2490 free_glyph_matrix (w
->desired_matrix
);
2491 free_glyph_matrix (w
->current_matrix
);
2492 w
->desired_matrix
= w
->current_matrix
= NULL
;
2493 f
->menu_bar_window
= Qnil
;
2496 /* Free the tool bar window and its glyph matrices. */
2497 if (!NILP (f
->tool_bar_window
))
2499 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2500 free_glyph_matrix (w
->desired_matrix
);
2501 free_glyph_matrix (w
->current_matrix
);
2502 w
->desired_matrix
= w
->current_matrix
= NULL
;
2503 f
->tool_bar_window
= Qnil
;
2506 /* Release frame glyph matrices. Reset fields to zero in
2507 case we are called a second time. */
2508 if (f
->desired_matrix
)
2510 free_glyph_matrix (f
->desired_matrix
);
2511 free_glyph_matrix (f
->current_matrix
);
2512 f
->desired_matrix
= f
->current_matrix
= NULL
;
2515 /* Release glyph pools. */
2516 if (f
->desired_pool
)
2518 free_glyph_pool (f
->desired_pool
);
2519 free_glyph_pool (f
->current_pool
);
2520 f
->desired_pool
= f
->current_pool
= NULL
;
2528 /* Free glyph sub-matrices in the window tree rooted at W. This
2529 function may be called with a null pointer, and it may be called on
2530 the same tree more than once. */
2533 free_window_matrices (w
)
2538 if (!NILP (w
->hchild
))
2539 free_window_matrices (XWINDOW (w
->hchild
));
2540 else if (!NILP (w
->vchild
))
2541 free_window_matrices (XWINDOW (w
->vchild
));
2544 /* This is a leaf window. Free its memory and reset fields
2545 to zero in case this function is called a second time for
2547 free_glyph_matrix (w
->current_matrix
);
2548 free_glyph_matrix (w
->desired_matrix
);
2549 w
->current_matrix
= w
->desired_matrix
= NULL
;
2552 /* Next window on same level. */
2553 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2558 /* Check glyph memory leaks. This function is called from
2559 shut_down_emacs. Note that frames are not destroyed when Emacs
2560 exits. We therefore free all glyph memory for all active frames
2561 explicitly and check that nothing is left allocated. */
2564 check_glyph_memory ()
2566 Lisp_Object tail
, frame
;
2568 /* Free glyph memory for all frames. */
2569 FOR_EACH_FRAME (tail
, frame
)
2570 free_glyphs (XFRAME (frame
));
2572 /* Check that nothing is left allocated. */
2573 if (glyph_matrix_count
)
2575 if (glyph_pool_count
)
2581 /**********************************************************************
2582 Building a Frame Matrix
2583 **********************************************************************/
2585 /* Most of the redisplay code works on glyph matrices attached to
2586 windows. This is a good solution most of the time, but it is not
2587 suitable for terminal code. Terminal output functions cannot rely
2588 on being able to set an arbitrary terminal window. Instead they
2589 must be provided with a view of the whole frame, i.e. the whole
2590 screen. We build such a view by constructing a frame matrix from
2591 window matrices in this section.
2593 Windows that must be updated have their must_be_update_p flag set.
2594 For all such windows, their desired matrix is made part of the
2595 desired frame matrix. For other windows, their current matrix is
2596 made part of the desired frame matrix.
2598 +-----------------+----------------+
2599 | desired | desired |
2601 +-----------------+----------------+
2604 +----------------------------------+
2606 Desired window matrices can be made part of the frame matrix in a
2607 cheap way: We exploit the fact that the desired frame matrix and
2608 desired window matrices share their glyph memory. This is not
2609 possible for current window matrices. Their glyphs are copied to
2610 the desired frame matrix. The latter is equivalent to
2611 preserve_other_columns in the old redisplay.
2613 Used glyphs counters for frame matrix rows are the result of adding
2614 up glyph lengths of the window matrices. A line in the frame
2615 matrix is enabled, if a corresponding line in a window matrix is
2618 After building the desired frame matrix, it will be passed to
2619 terminal code, which will manipulate both the desired and current
2620 frame matrix. Changes applied to the frame's current matrix have
2621 to be visible in current window matrices afterwards, of course.
2623 This problem is solved like this:
2625 1. Window and frame matrices share glyphs. Window matrices are
2626 constructed in a way that their glyph contents ARE the glyph
2627 contents needed in a frame matrix. Thus, any modification of
2628 glyphs done in terminal code will be reflected in window matrices
2631 2. Exchanges of rows in a frame matrix done by terminal code are
2632 intercepted by hook functions so that corresponding row operations
2633 on window matrices can be performed. This is necessary because we
2634 use pointers to glyphs in glyph row structures. To satisfy the
2635 assumption of point 1 above that glyphs are updated implicitly in
2636 window matrices when they are manipulated via the frame matrix,
2637 window and frame matrix must of course agree where to find the
2638 glyphs for their rows. Possible manipulations that must be
2639 mirrored are assignments of rows of the desired frame matrix to the
2640 current frame matrix and scrolling the current frame matrix. */
2642 /* Build frame F's desired matrix from window matrices. Only windows
2643 which have the flag must_be_updated_p set have to be updated. Menu
2644 bar lines of a frame are not covered by window matrices, so make
2645 sure not to touch them in this function. */
2648 build_frame_matrix (f
)
2653 /* F must have a frame matrix when this function is called. */
2654 xassert (!FRAME_WINDOW_P (f
));
2656 /* Clear all rows in the frame matrix covered by window matrices.
2657 Menu bar lines are not covered by windows. */
2658 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2659 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2661 /* Build the matrix by walking the window tree. */
2662 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2663 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2667 /* Walk a window tree, building a frame matrix MATRIX from window
2668 matrices. W is the root of a window tree. */
2671 build_frame_matrix_from_window_tree (matrix
, w
)
2672 struct glyph_matrix
*matrix
;
2677 if (!NILP (w
->hchild
))
2678 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2679 else if (!NILP (w
->vchild
))
2680 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2682 build_frame_matrix_from_leaf_window (matrix
, w
);
2684 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2689 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2690 desired frame matrix built. W is a leaf window whose desired or
2691 current matrix is to be added to FRAME_MATRIX. W's flag
2692 must_be_updated_p determines which matrix it contributes to
2693 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2694 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2695 Adding a desired matrix means setting up used counters and such in
2696 frame rows, while adding a current window matrix to FRAME_MATRIX
2697 means copying glyphs. The latter case corresponds to
2698 preserve_other_columns in the old redisplay. */
2701 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2702 struct glyph_matrix
*frame_matrix
;
2705 struct glyph_matrix
*window_matrix
;
2706 int window_y
, frame_y
;
2707 /* If non-zero, a glyph to insert at the right border of W. */
2708 GLYPH right_border_glyph
= 0;
2710 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2711 if (w
->must_be_updated_p
)
2713 window_matrix
= w
->desired_matrix
;
2715 /* Decide whether we want to add a vertical border glyph. */
2716 if (!WINDOW_RIGHTMOST_P (w
))
2718 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2719 right_border_glyph
= (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
2720 ? XINT (DISP_BORDER_GLYPH (dp
))
2725 window_matrix
= w
->current_matrix
;
2727 /* For all rows in the window matrix and corresponding rows in the
2730 frame_y
= window_matrix
->matrix_y
;
2731 while (window_y
< window_matrix
->nrows
)
2733 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2734 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2735 int current_row_p
= window_matrix
== w
->current_matrix
;
2737 /* Fill up the frame row with spaces up to the left margin of the
2739 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2741 /* Fill up areas in the window matrix row with spaces. */
2742 fill_up_glyph_row_with_spaces (window_row
);
2744 /* If only part of W's desired matrix has been built, and
2745 window_row wasn't displayed, use the corresponding current
2747 if (window_matrix
== w
->desired_matrix
2748 && !window_row
->enabled_p
)
2750 window_row
= w
->current_matrix
->rows
+ window_y
;
2756 /* Copy window row to frame row. */
2757 bcopy (window_row
->glyphs
[0],
2758 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2759 window_matrix
->matrix_w
* sizeof (struct glyph
));
2763 xassert (window_row
->enabled_p
);
2765 /* Only when a desired row has been displayed, we want
2766 the corresponding frame row to be updated. */
2767 frame_row
->enabled_p
= 1;
2769 /* Maybe insert a vertical border between horizontally adjacent
2771 if (right_border_glyph
)
2773 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2774 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2777 /* Window row window_y must be a slice of frame row
2779 xassert (glyph_row_slice_p (window_row
, frame_row
));
2781 /* If rows are in sync, we don't have to copy glyphs because
2782 frame and window share glyphs. */
2785 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2786 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2790 /* Set number of used glyphs in the frame matrix. Since we fill
2791 up with spaces, and visit leaf windows from left to right it
2792 can be done simply. */
2793 frame_row
->used
[TEXT_AREA
]
2794 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2803 /* Add spaces to a glyph row ROW in a window matrix.
2805 Each row has the form:
2807 +---------+-----------------------------+------------+
2808 | left | text | right |
2809 +---------+-----------------------------+------------+
2811 Left and right marginal areas are optional. This function adds
2812 spaces to areas so that there are no empty holes between areas.
2813 In other words: If the right area is not empty, the text area
2814 is filled up with spaces up to the right area. If the text area
2815 is not empty, the left area is filled up.
2817 To be called for frame-based redisplay, only. */
2820 fill_up_glyph_row_with_spaces (row
)
2821 struct glyph_row
*row
;
2823 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2824 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2825 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2829 /* Fill area AREA of glyph row ROW with spaces. To be called for
2830 frame-based redisplay only. */
2833 fill_up_glyph_row_area_with_spaces (row
, area
)
2834 struct glyph_row
*row
;
2837 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2839 struct glyph
*end
= row
->glyphs
[area
+ 1];
2840 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2843 *text
++ = space_glyph
;
2844 row
->used
[area
] = text
- row
->glyphs
[area
];
2849 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2850 reached. In frame matrices only one area, TEXT_AREA, is used. */
2853 fill_up_frame_row_with_spaces (row
, upto
)
2854 struct glyph_row
*row
;
2857 int i
= row
->used
[TEXT_AREA
];
2858 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2861 glyph
[i
++] = space_glyph
;
2863 row
->used
[TEXT_AREA
] = i
;
2868 /**********************************************************************
2869 Mirroring operations on frame matrices in window matrices
2870 **********************************************************************/
2872 /* Set frame being updated via frame-based redisplay to F. This
2873 function must be called before updates to make explicit that we are
2874 working on frame matrices or not. */
2877 set_frame_matrix_frame (f
)
2880 frame_matrix_frame
= f
;
2884 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2885 DESIRED_MATRIX is the desired matrix corresponding to
2886 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2887 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2888 frame_matrix_frame is non-null, this indicates that the exchange is
2889 done in frame matrices, and that we have to perform analogous
2890 operations in window matrices of frame_matrix_frame. */
2893 make_current (desired_matrix
, current_matrix
, row
)
2894 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2897 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2898 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2899 int mouse_face_p
= current_row
->mouse_face_p
;
2901 /* Do current_row = desired_row. This exchanges glyph pointers
2902 between both rows, and does a structure assignment otherwise. */
2903 assign_row (current_row
, desired_row
);
2905 /* Enable current_row to mark it as valid. */
2906 current_row
->enabled_p
= 1;
2907 current_row
->mouse_face_p
= mouse_face_p
;
2909 /* If we are called on frame matrices, perform analogous operations
2910 for window matrices. */
2911 if (frame_matrix_frame
)
2912 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2916 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2917 W's frame which has been made current (by swapping pointers between
2918 current and desired matrix). Perform analogous operations in the
2919 matrices of leaf windows in the window tree rooted at W. */
2922 mirror_make_current (w
, frame_row
)
2928 if (!NILP (w
->hchild
))
2929 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2930 else if (!NILP (w
->vchild
))
2931 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2934 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2935 here because the checks performed in debug mode there
2936 will not allow the conversion. */
2937 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2939 /* If FRAME_ROW is within W, assign the desired row to the
2940 current row (exchanging glyph pointers). */
2941 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2943 struct glyph_row
*current_row
2944 = MATRIX_ROW (w
->current_matrix
, row
);
2945 struct glyph_row
*desired_row
2946 = MATRIX_ROW (w
->desired_matrix
, row
);
2948 if (desired_row
->enabled_p
)
2949 assign_row (current_row
, desired_row
);
2951 swap_glyph_pointers (desired_row
, current_row
);
2952 current_row
->enabled_p
= 1;
2956 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2961 /* Perform row dance after scrolling. We are working on the range of
2962 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2963 including) in MATRIX. COPY_FROM is a vector containing, for each
2964 row I in the range 0 <= I < NLINES, the index of the original line
2965 to move to I. This index is relative to the row range, i.e. 0 <=
2966 index < NLINES. RETAINED_P is a vector containing zero for each
2967 row 0 <= I < NLINES which is empty.
2969 This function is called from do_scrolling and do_direct_scrolling. */
2972 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2974 struct glyph_matrix
*matrix
;
2975 int unchanged_at_top
, nlines
;
2979 /* A copy of original rows. */
2980 struct glyph_row
*old_rows
;
2982 /* Rows to assign to. */
2983 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2987 /* Make a copy of the original rows. */
2988 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2989 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
2991 /* Assign new rows, maybe clear lines. */
2992 for (i
= 0; i
< nlines
; ++i
)
2994 int enabled_before_p
= new_rows
[i
].enabled_p
;
2996 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2997 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2998 new_rows
[i
] = old_rows
[copy_from
[i
]];
2999 new_rows
[i
].enabled_p
= enabled_before_p
;
3001 /* RETAINED_P is zero for empty lines. */
3002 if (!retained_p
[copy_from
[i
]])
3003 new_rows
[i
].enabled_p
= 0;
3006 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3007 if (frame_matrix_frame
)
3008 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3009 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3013 /* Synchronize glyph pointers in the current matrix of window W with
3014 the current frame matrix. */
3017 sync_window_with_frame_matrix_rows (w
)
3020 struct frame
*f
= XFRAME (w
->frame
);
3021 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3022 int left
, right
, x
, width
;
3024 /* Preconditions: W must be a leaf window on a tty frame. */
3025 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3026 xassert (!FRAME_WINDOW_P (f
));
3028 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3029 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3030 x
= w
->current_matrix
->matrix_x
;
3031 width
= w
->current_matrix
->matrix_w
;
3033 window_row
= w
->current_matrix
->rows
;
3034 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3035 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3037 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3039 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3040 = frame_row
->glyphs
[0] + x
;
3041 window_row
->glyphs
[TEXT_AREA
]
3042 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3043 window_row
->glyphs
[LAST_AREA
]
3044 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3045 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3046 = window_row
->glyphs
[LAST_AREA
] - right
;
3051 /* Return the window in the window tree rooted in W containing frame
3052 row ROW. Value is null if none is found. */
3055 frame_row_to_window (w
, row
)
3059 struct window
*found
= NULL
;
3063 if (!NILP (w
->hchild
))
3064 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3065 else if (!NILP (w
->vchild
))
3066 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3067 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3068 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3071 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3078 /* Perform a line dance in the window tree rooted at W, after
3079 scrolling a frame matrix in mirrored_line_dance.
3081 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3082 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3083 COPY_FROM is a vector containing, for each row I in the range 0 <=
3084 I < NLINES, the index of the original line to move to I. This
3085 index is relative to the row range, i.e. 0 <= index < NLINES.
3086 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3090 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3092 int unchanged_at_top
, nlines
;
3098 if (!NILP (w
->hchild
))
3099 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3100 nlines
, copy_from
, retained_p
);
3101 else if (!NILP (w
->vchild
))
3102 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3103 nlines
, copy_from
, retained_p
);
3106 /* W is a leaf window, and we are working on its current
3108 struct glyph_matrix
*m
= w
->current_matrix
;
3110 struct glyph_row
*old_rows
;
3112 /* Make a copy of the original rows of matrix m. */
3113 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3114 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3116 for (i
= 0; i
< nlines
; ++i
)
3118 /* Frame relative line assigned to. */
3119 int frame_to
= i
+ unchanged_at_top
;
3121 /* Frame relative line assigned. */
3122 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3124 /* Window relative line assigned to. */
3125 int window_to
= frame_to
- m
->matrix_y
;
3127 /* Window relative line assigned. */
3128 int window_from
= frame_from
- m
->matrix_y
;
3130 /* Is assigned line inside window? */
3131 int from_inside_window_p
3132 = window_from
>= 0 && window_from
< m
->matrix_h
;
3134 /* Is assigned to line inside window? */
3135 int to_inside_window_p
3136 = window_to
>= 0 && window_to
< m
->matrix_h
;
3138 if (from_inside_window_p
&& to_inside_window_p
)
3140 /* Enabled setting before assignment. */
3141 int enabled_before_p
;
3143 /* Do the assignment. The enabled_p flag is saved
3144 over the assignment because the old redisplay did
3146 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3147 m
->rows
[window_to
] = old_rows
[window_from
];
3148 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3150 /* If frame line is empty, window line is empty, too. */
3151 if (!retained_p
[copy_from
[i
]])
3152 m
->rows
[window_to
].enabled_p
= 0;
3154 else if (to_inside_window_p
)
3156 /* A copy between windows. This is an infrequent
3157 case not worth optimizing. */
3158 struct frame
*f
= XFRAME (w
->frame
);
3159 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3161 struct glyph_matrix
*m2
;
3164 w2
= frame_row_to_window (root
, frame_to
);
3165 m2
= w2
->current_matrix
;
3166 m2_from
= frame_from
- m2
->matrix_y
;
3167 copy_row_except_pointers (m
->rows
+ window_to
,
3168 m2
->rows
+ m2_from
);
3170 /* If frame line is empty, window line is empty, too. */
3171 if (!retained_p
[copy_from
[i
]])
3172 m
->rows
[window_to
].enabled_p
= 0;
3175 else if (from_inside_window_p
)
3179 /* If there was a copy between windows, make sure glyph
3180 pointers are in sync with the frame matrix. */
3182 sync_window_with_frame_matrix_rows (w
);
3184 /* Check that no pointers are lost. */
3188 /* Next window on same level. */
3189 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3196 /* Check that window and frame matrices agree about their
3197 understanding where glyphs of the rows are to find. For each
3198 window in the window tree rooted at W, check that rows in the
3199 matrices of leaf window agree with their frame matrices about
3203 check_window_matrix_pointers (w
)
3208 if (!NILP (w
->hchild
))
3209 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3210 else if (!NILP (w
->vchild
))
3211 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3214 struct frame
*f
= XFRAME (w
->frame
);
3215 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3216 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3219 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3224 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3225 a window and FRAME_MATRIX is the corresponding frame matrix. For
3226 each row in WINDOW_MATRIX check that it's a slice of the
3227 corresponding frame row. If it isn't, abort. */
3230 check_matrix_pointers (window_matrix
, frame_matrix
)
3231 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3233 /* Row number in WINDOW_MATRIX. */
3236 /* Row number corresponding to I in FRAME_MATRIX. */
3237 int j
= window_matrix
->matrix_y
;
3239 /* For all rows check that the row in the window matrix is a
3240 slice of the row in the frame matrix. If it isn't we didn't
3241 mirror an operation on the frame matrix correctly. */
3242 while (i
< window_matrix
->nrows
)
3244 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3245 frame_matrix
->rows
+ j
))
3251 #endif /* GLYPH_DEBUG != 0 */
3255 /**********************************************************************
3256 VPOS and HPOS translations
3257 **********************************************************************/
3261 /* Translate vertical position VPOS which is relative to window W to a
3262 vertical position relative to W's frame. */
3265 window_to_frame_vpos (w
, vpos
)
3269 struct frame
*f
= XFRAME (w
->frame
);
3271 xassert (!FRAME_WINDOW_P (f
));
3272 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3273 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3274 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3279 /* Translate horizontal position HPOS which is relative to window W to
3280 a horizontal position relative to W's frame. */
3283 window_to_frame_hpos (w
, hpos
)
3287 struct frame
*f
= XFRAME (w
->frame
);
3289 xassert (!FRAME_WINDOW_P (f
));
3290 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3294 #endif /* GLYPH_DEBUG */
3298 /**********************************************************************
3300 **********************************************************************/
3302 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3303 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3309 CHECK_LIVE_FRAME (frame
);
3312 /* Ignore redraw requests, if frame has no glyphs yet.
3313 (Implementation note: It still has to be checked why we are
3314 called so early here). */
3315 if (!glyphs_initialized_initially_p
)
3319 if (FRAME_MSDOS_P (f
))
3320 set_terminal_modes (0);
3322 clear_current_matrices (f
);
3324 fflush (TTY_OUTPUT (FRAME_TTY (f
)));
3325 windows_or_buffers_changed
++;
3326 /* Mark all windows as inaccurate, so that every window will have
3327 its redisplay done. */
3328 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3329 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3335 /* Redraw frame F. This is nothing more than a call to the Lisp
3336 function redraw-frame. */
3343 XSETFRAME (frame
, f
);
3344 Fredraw_frame (frame
);
3348 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3349 doc
: /* Clear and redisplay all visible frames. */)
3352 Lisp_Object tail
, frame
;
3354 FOR_EACH_FRAME (tail
, frame
)
3355 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3356 Fredraw_frame (frame
);
3362 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3363 visible frames marked as garbaged. */
3366 redraw_garbaged_frames ()
3368 Lisp_Object tail
, frame
;
3370 FOR_EACH_FRAME (tail
, frame
)
3371 if (FRAME_VISIBLE_P (XFRAME (frame
))
3372 && FRAME_GARBAGED_P (XFRAME (frame
)))
3373 Fredraw_frame (frame
);
3378 /***********************************************************************
3380 ***********************************************************************/
3382 /* Try to update display and current glyph matrix directly.
3384 This function is called after a character G has been inserted into
3385 current_buffer. It tries to update the current glyph matrix and
3386 perform appropriate screen output to reflect the insertion. If it
3387 succeeds, the global flag redisplay_performed_directly_p will be
3388 set to 1, and thereby prevent the more costly general redisplay
3389 from running (see redisplay_internal).
3391 This function is not called for `hairy' character insertions.
3392 In particular, it is not called when after or before change
3393 functions exist, like they are used by font-lock. See keyboard.c
3394 for details where this function is called. */
3397 direct_output_for_insert (g
)
3400 register struct frame
*f
= SELECTED_FRAME ();
3401 struct window
*w
= XWINDOW (selected_window
);
3403 struct glyph_row
*glyph_row
;
3404 struct glyph
*glyphs
, *glyph
, *end
;
3406 /* Non-null means that redisplay of W is based on window matrices. */
3407 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3408 /* Non-null means we are in overwrite mode. */
3409 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3411 struct text_pos pos
;
3412 int delta
, delta_bytes
;
3414 /* Not done directly. */
3415 redisplay_performed_directly_p
= 0;
3417 /* Quickly give up for some common cases. */
3418 if (cursor_in_echo_area
3419 /* Give up if fonts have changed. */
3421 /* Give up if face attributes have been changed. */
3422 || face_change_count
3423 /* Give up if cursor position not really known. */
3424 || !display_completed
3425 /* Give up if buffer appears in two places. */
3426 || buffer_shared
> 1
3427 /* Give up if currently displaying a message instead of the
3428 minibuffer contents. */
3429 || (EQ (selected_window
, minibuf_window
)
3430 && EQ (minibuf_window
, echo_area_window
))
3431 /* Give up for hscrolled mini-buffer because display of the prompt
3432 is handled specially there (see display_line). */
3433 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3434 /* Give up if overwriting in the middle of a line. */
3437 && FETCH_BYTE (PT
) != '\n')
3438 /* Give up for tabs and line ends. */
3442 /* Give up if unable to display the cursor in the window. */
3443 || w
->cursor
.vpos
< 0
3444 /* Give up if we are showing a message or just cleared the message
3445 because we might need to resize the echo area window. */
3446 || !NILP (echo_area_buffer
[0])
3447 || !NILP (echo_area_buffer
[1])
3448 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3449 /* Can't do it in a continued line because continuation
3450 lines would change. */
3451 (glyph_row
->continued_p
3452 /* Can't use this method if the line overlaps others or is
3453 overlapped by others because these other lines would
3454 have to be redisplayed. */
3455 || glyph_row
->overlapping_p
3456 || glyph_row
->overlapped_p
))
3457 /* Can't do it for partial width windows on terminal frames
3458 because we can't clear to eol in such a window. */
3459 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3462 /* If we can't insert glyphs, we can use this method only
3463 at the end of a line. */
3464 if (!TTY_CHAR_INS_DEL_OK (FRAME_TTY (f
)))
3465 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3468 /* Set up a display iterator structure for W. Glyphs will be
3469 produced in scratch_glyph_row. Current position is W's cursor
3471 clear_glyph_row (&scratch_glyph_row
);
3472 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3473 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3474 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3477 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3478 if (glyph_row
->mouse_face_p
)
3481 /* Give up if highlighting trailing whitespace and we have trailing
3482 whitespace in glyph_row. We would have to remove the trailing
3483 whitespace face in that case. */
3484 if (!NILP (Vshow_trailing_whitespace
)
3485 && glyph_row
->used
[TEXT_AREA
])
3489 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3490 if (last
->type
== STRETCH_GLYPH
3491 || (last
->type
== CHAR_GLYPH
3492 && last
->u
.ch
== ' '))
3496 /* Give up if there are overlay strings at pos. This would fail
3497 if the overlay string has newlines in it. */
3498 if (STRINGP (it
.string
))
3501 it
.hpos
= w
->cursor
.hpos
;
3502 it
.vpos
= w
->cursor
.vpos
;
3503 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3504 it
.current_y
= w
->cursor
.y
;
3505 it
.end_charpos
= PT
;
3506 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3507 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3509 /* More than one display element may be returned for PT - 1 if
3510 (i) it's a control character which is translated into `\003' or
3511 `^C', or (ii) it has a display table entry, or (iii) it's a
3512 combination of both. */
3513 delta
= delta_bytes
= 0;
3514 while (get_next_display_element (&it
))
3516 PRODUCE_GLYPHS (&it
);
3518 /* Give up if glyph doesn't fit completely on the line. */
3519 if (it
.current_x
>= it
.last_visible_x
)
3522 /* Give up if new glyph has different ascent or descent than
3523 the original row, or if it is not a character glyph. */
3524 if (glyph_row
->ascent
!= it
.ascent
3525 || glyph_row
->height
!= it
.ascent
+ it
.descent
3526 || glyph_row
->phys_ascent
!= it
.phys_ascent
3527 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3528 || it
.what
!= IT_CHARACTER
)
3532 delta_bytes
+= it
.len
;
3533 set_iterator_to_next (&it
, 1);
3536 /* Give up if we hit the right edge of the window. We would have
3537 to insert truncation or continuation glyphs. */
3538 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3539 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3542 /* Give up if there is a \t following in the line. */
3544 it2
.end_charpos
= ZV
;
3545 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3546 while (get_next_display_element (&it2
)
3547 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3551 set_iterator_to_next (&it2
, 1);
3554 /* Number of new glyphs produced. */
3555 n
= it
.glyph_row
->used
[TEXT_AREA
];
3557 /* Start and end of glyphs in original row. */
3558 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3559 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3561 /* Make room for new glyphs, then insert them. */
3562 xassert (end
- glyphs
- n
>= 0);
3563 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3564 (end
- glyphs
- n
) * sizeof (*end
));
3565 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3566 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3567 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3569 /* Compute new line width. */
3570 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3571 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3572 glyph_row
->pixel_width
= glyph_row
->x
;
3575 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3579 /* Increment buffer positions for glyphs following the newly
3581 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3582 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3583 glyph
->charpos
+= delta
;
3585 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3587 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3588 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3591 /* Adjust positions in lines following the one we are in. */
3592 increment_matrix_positions (w
->current_matrix
,
3594 w
->current_matrix
->nrows
,
3595 delta
, delta_bytes
);
3597 glyph_row
->contains_overlapping_glyphs_p
3598 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3600 glyph_row
->displays_text_p
= 1;
3601 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3602 XFASTINT (w
->window_end_vpos
)));
3604 if (!NILP (Vshow_trailing_whitespace
))
3605 highlight_trailing_whitespace (it
.f
, glyph_row
);
3607 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3608 In the middle, we have to insert glyphs. Note that this is now
3609 implemented for X frames. The implementation uses updated_window
3611 updated_row
= glyph_row
;
3612 updated_area
= TEXT_AREA
;
3616 rif
->update_window_begin_hook (w
);
3618 if (glyphs
== end
- n
3619 /* In front of a space added by append_space. */
3620 || (glyphs
== end
- n
- 1
3621 && (end
- n
)->charpos
<= 0))
3622 rif
->write_glyphs (glyphs
, n
);
3624 rif
->insert_glyphs (glyphs
, n
);
3628 if (glyphs
== end
- n
)
3629 write_glyphs (glyphs
, n
);
3631 insert_glyphs (glyphs
, n
);
3634 w
->cursor
.hpos
+= n
;
3635 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3636 xassert (w
->cursor
.hpos
>= 0
3637 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3639 /* How to set the cursor differs depending on whether we are
3640 using a frame matrix or a window matrix. Note that when
3641 a frame matrix is used, cursor_to expects frame coordinates,
3642 and the X and Y parameters are not used. */
3643 if (window_redisplay_p
)
3644 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3645 w
->cursor
.y
, w
->cursor
.x
);
3649 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3650 + (INTEGERP (w
->left_margin_cols
)
3651 ? XFASTINT (w
->left_margin_cols
)
3653 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3658 rif
->update_window_end_hook (w
, 1, 0);
3661 fflush (TTY_OUTPUT (CURTTY ()));
3663 TRACE ((stderr
, "direct output for insert\n"));
3664 mark_window_display_accurate (it
.window
, 1);
3665 redisplay_performed_directly_p
= 1;
3670 /* Perform a direct display update for moving PT by N positions
3671 left or right. N < 0 means a movement backwards. This function
3672 is currently only called for N == 1 or N == -1. */
3675 direct_output_forward_char (n
)
3678 struct frame
*f
= SELECTED_FRAME ();
3679 struct window
*w
= XWINDOW (selected_window
);
3680 struct glyph_row
*row
;
3682 /* Give up if point moved out of or into a composition. */
3683 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3684 current_buffer
, PT
))
3687 /* Give up if face attributes have been changed. */
3688 if (face_change_count
)
3691 /* Give up if current matrix is not up to date or we are
3692 displaying a message. */
3693 if (!display_completed
|| cursor_in_echo_area
)
3696 /* Give up if the buffer's direction is reversed. */
3697 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3700 /* Can't use direct output if highlighting a region. */
3701 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3704 /* Can't use direct output if highlighting trailing whitespace. */
3705 if (!NILP (Vshow_trailing_whitespace
))
3708 /* Give up if we are showing a message or just cleared the message
3709 because we might need to resize the echo area window. */
3710 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3713 /* Give up if currently displaying a message instead of the
3714 minibuffer contents. */
3715 if (XWINDOW (minibuf_window
) == w
3716 && EQ (minibuf_window
, echo_area_window
))
3719 /* Give up if we don't know where the cursor is. */
3720 if (w
->cursor
.vpos
< 0)
3723 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3725 /* Give up if PT is outside of the last known cursor row. */
3726 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3727 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3730 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3732 w
->last_cursor
= w
->cursor
;
3733 XSETFASTINT (w
->last_point
, PT
);
3735 xassert (w
->cursor
.hpos
>= 0
3736 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3738 if (FRAME_WINDOW_P (f
))
3739 rif
->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3740 w
->cursor
.y
, w
->cursor
.x
);
3744 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3745 + (INTEGERP (w
->left_margin_cols
)
3746 ? XFASTINT (w
->left_margin_cols
)
3748 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3752 fflush (TTY_OUTPUT (CURTTY ()));
3753 redisplay_performed_directly_p
= 1;
3759 /***********************************************************************
3761 ***********************************************************************/
3763 /* Update frame F based on the data in desired matrices.
3765 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3766 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3769 Value is non-zero if redisplay was stopped due to pending input. */
3772 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3775 int inhibit_hairy_id_p
;
3777 /* 1 means display has been paused because of pending input. */
3779 struct window
*root_window
= XWINDOW (f
->root_window
);
3781 if (FRAME_WINDOW_P (f
))
3783 /* We are working on window matrix basis. All windows whose
3784 flag must_be_updated_p is set have to be updated. */
3786 /* Record that we are not working on frame matrices. */
3787 set_frame_matrix_frame (NULL
);
3789 /* Update all windows in the window tree of F, maybe stopping
3790 when pending input is detected. */
3793 /* Update the menu bar on X frames that don't have toolkit
3795 if (WINDOWP (f
->menu_bar_window
))
3796 update_window (XWINDOW (f
->menu_bar_window
), 1);
3798 /* Update the tool-bar window, if present. */
3799 if (WINDOWP (f
->tool_bar_window
))
3801 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3803 /* Update tool-bar window. */
3804 if (w
->must_be_updated_p
)
3808 update_window (w
, 1);
3809 w
->must_be_updated_p
= 0;
3811 /* Swap tool-bar strings. We swap because we want to
3813 tem
= f
->current_tool_bar_string
;
3814 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3815 f
->desired_tool_bar_string
= tem
;
3820 /* Update windows. */
3821 paused_p
= update_window_tree (root_window
, force_p
);
3824 #if 0 /* This flush is a performance bottleneck under X,
3825 and it doesn't seem to be necessary anyway. */
3826 rif
->flush_display (f
);
3831 /* We are working on frame matrix basis. Set the frame on whose
3832 frame matrix we operate. */
3833 set_frame_matrix_frame (f
);
3835 /* Build F's desired matrix from window matrices. */
3836 build_frame_matrix (f
);
3838 /* Update the display */
3840 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3843 if (TTY_TERMSCRIPT (FRAME_TTY (f
)))
3844 fflush (TTY_TERMSCRIPT (FRAME_TTY (f
)));
3845 fflush (TTY_OUTPUT (FRAME_TTY (f
)));
3847 /* Check window matrices for lost pointers. */
3849 check_window_matrix_pointers (root_window
);
3850 add_frame_display_history (f
, paused_p
);
3854 /* Reset flags indicating that a window should be updated. */
3855 set_window_update_flags (root_window
, 0);
3857 display_completed
= !paused_p
;
3863 /************************************************************************
3864 Window-based updates
3865 ************************************************************************/
3867 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3868 don't stop updating when input is pending. */
3871 update_window_tree (w
, force_p
)
3877 while (w
&& !paused_p
)
3879 if (!NILP (w
->hchild
))
3880 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3881 else if (!NILP (w
->vchild
))
3882 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3883 else if (w
->must_be_updated_p
)
3884 paused_p
|= update_window (w
, force_p
);
3886 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3893 /* Update window W if its flag must_be_updated_p is non-zero. If
3894 FORCE_P is non-zero, don't stop updating if input is pending. */
3897 update_single_window (w
, force_p
)
3901 if (w
->must_be_updated_p
)
3903 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3905 /* Record that this is not a frame-based redisplay. */
3906 set_frame_matrix_frame (NULL
);
3910 update_window (w
, force_p
);
3913 /* Reset flag in W. */
3914 w
->must_be_updated_p
= 0;
3919 /* Redraw lines from the current matrix of window W that are
3920 overlapped by other rows. YB is bottom-most y-position in W. */
3923 redraw_overlapped_rows (w
, yb
)
3929 /* If rows overlapping others have been changed, the rows being
3930 overlapped have to be redrawn. This won't draw lines that have
3931 already been drawn in update_window_line because overlapped_p in
3932 desired rows is 0, so after row assignment overlapped_p in
3933 current rows is 0. */
3934 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3936 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3938 if (!row
->enabled_p
)
3940 else if (row
->mode_line_p
)
3943 if (row
->overlapped_p
)
3945 enum glyph_row_area area
;
3947 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3950 updated_area
= area
;
3951 rif
->cursor_to (i
, 0, row
->y
, area
== TEXT_AREA
? row
->x
: 0);
3952 if (row
->used
[area
])
3953 rif
->write_glyphs (row
->glyphs
[area
], row
->used
[area
]);
3954 rif
->clear_end_of_line (-1);
3957 row
->overlapped_p
= 0;
3960 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3966 /* Redraw lines from the current matrix of window W that overlap
3967 others. YB is bottom-most y-position in W. */
3970 redraw_overlapping_rows (w
, yb
)
3975 struct glyph_row
*row
;
3977 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3979 row
= w
->current_matrix
->rows
+ i
;
3981 if (!row
->enabled_p
)
3983 else if (row
->mode_line_p
)
3986 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3988 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
3990 if (row
->used
[LEFT_MARGIN_AREA
])
3991 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
);
3993 if (row
->used
[TEXT_AREA
])
3994 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
);
3996 if (row
->used
[RIGHT_MARGIN_AREA
])
3997 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
);
3999 /* Record in neighbour rows that ROW overwrites part of their
4001 if (row
->phys_ascent
> row
->ascent
&& i
> 0)
4002 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4003 if ((row
->phys_height
- row
->phys_ascent
4004 > row
->height
- row
->ascent
)
4006 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4017 /* Check that no row in the current matrix of window W is enabled
4018 which is below what's displayed in the window. */
4021 check_current_matrix_flags (w
)
4024 int last_seen_p
= 0;
4025 int i
, yb
= window_text_bottom_y (w
);
4027 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4029 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4030 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4032 else if (last_seen_p
&& row
->enabled_p
)
4037 #endif /* GLYPH_DEBUG */
4040 /* Update display of window W. FORCE_P non-zero means that we should
4041 not stop when detecting pending input. */
4044 update_window (w
, force_p
)
4048 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4050 int preempt_count
= baud_rate
/ 2400 + 1;
4051 extern int input_pending
;
4052 extern Lisp_Object do_mouse_tracking
;
4054 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4057 /* Check that W's frame doesn't have glyph matrices. */
4058 xassert (FRAME_WINDOW_P (f
));
4059 xassert (updating_frame
!= NULL
);
4061 /* Check pending input the first time so that we can quickly return. */
4062 if (redisplay_dont_pause
)
4065 detect_input_pending ();
4067 /* If forced to complete the update, or if no input is pending, do
4069 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4071 struct glyph_row
*row
, *end
;
4072 struct glyph_row
*mode_line_row
;
4073 struct glyph_row
*header_line_row
;
4074 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4076 rif
->update_window_begin_hook (w
);
4077 yb
= window_text_bottom_y (w
);
4079 /* If window has a header line, update it before everything else.
4080 Adjust y-positions of other rows by the header line height. */
4081 row
= desired_matrix
->rows
;
4082 end
= row
+ desired_matrix
->nrows
- 1;
4084 if (row
->mode_line_p
)
4086 header_line_row
= row
;
4090 header_line_row
= NULL
;
4092 /* Update the mode line, if necessary. */
4093 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4094 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4096 mode_line_row
->y
= yb
;
4097 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4099 &mouse_face_overwritten_p
);
4103 /* Find first enabled row. Optimizations in redisplay_internal
4104 may lead to an update with only one row enabled. There may
4105 be also completely empty matrices. */
4106 while (row
< end
&& !row
->enabled_p
)
4109 /* Try reusing part of the display by copying. */
4110 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4112 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4115 /* All rows were found to be equal. */
4120 /* We've scrolled the display. */
4125 /* Update the header line after scrolling because a new header
4126 line would otherwise overwrite lines at the top of the window
4127 that can be scrolled. */
4128 if (header_line_row
&& header_line_row
->enabled_p
)
4130 header_line_row
->y
= 0;
4131 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4135 /* Update the rest of the lines. */
4136 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4139 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4142 /* We'll have to play a little bit with when to
4143 detect_input_pending. If it's done too often,
4144 scrolling large windows with repeated scroll-up
4145 commands will too quickly pause redisplay. */
4146 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4147 detect_input_pending ();
4149 changed_p
|= update_window_line (w
, vpos
,
4150 &mouse_face_overwritten_p
);
4152 /* Mark all rows below the last visible one in the current
4153 matrix as invalid. This is necessary because of
4154 variable line heights. Consider the case of three
4155 successive redisplays, where the first displays 5
4156 lines, the second 3 lines, and the third 5 lines again.
4157 If the second redisplay wouldn't mark rows in the
4158 current matrix invalid, the third redisplay might be
4159 tempted to optimize redisplay based on lines displayed
4160 in the first redisplay. */
4161 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4162 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4163 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4166 /* Was display preempted? */
4167 paused_p
= row
< end
;
4171 /* Fix the appearance of overlapping/overlapped rows. */
4172 if (!paused_p
&& !w
->pseudo_window_p
)
4174 if (changed_p
&& rif
->fix_overlapping_area
)
4176 redraw_overlapped_rows (w
, yb
);
4177 redraw_overlapping_rows (w
, yb
);
4180 /* Make cursor visible at cursor position of W. */
4181 set_window_cursor_after_update (w
);
4183 #if 0 /* Check that current matrix invariants are satisfied. This is
4184 for debugging only. See the comment of check_matrix_invariants. */
4185 IF_DEBUG (check_matrix_invariants (w
));
4190 /* Remember the redisplay method used to display the matrix. */
4191 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4194 /* End the update of window W. Don't set the cursor if we
4195 paused updating the display because in this case,
4196 set_window_cursor_after_update hasn't been called, and
4197 output_cursor doesn't contain the cursor location. */
4198 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4204 /* check_current_matrix_flags (w); */
4205 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4208 clear_glyph_matrix (desired_matrix
);
4214 /* Update the display of area AREA in window W, row number VPOS.
4215 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4218 update_marginal_area (w
, area
, vpos
)
4222 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4224 /* Let functions in xterm.c know what area subsequent X positions
4225 will be relative to. */
4226 updated_area
= area
;
4228 /* Set cursor to start of glyphs, write them, and clear to the end
4229 of the area. I don't think that something more sophisticated is
4230 necessary here, since marginal areas will not be the default. */
4231 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4232 if (desired_row
->used
[area
])
4233 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4234 rif
->clear_end_of_line (-1);
4238 /* Update the display of the text area of row VPOS in window W.
4239 Value is non-zero if display has changed. */
4242 update_text_area (w
, vpos
)
4246 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4247 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4250 /* Let functions in xterm.c know what area subsequent X positions
4251 will be relative to. */
4252 updated_area
= TEXT_AREA
;
4254 /* If rows are at different X or Y, or rows have different height,
4255 or the current row is marked invalid, write the entire line. */
4256 if (!current_row
->enabled_p
4257 || desired_row
->y
!= current_row
->y
4258 || desired_row
->ascent
!= current_row
->ascent
4259 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4260 || desired_row
->phys_height
!= current_row
->phys_height
4261 || desired_row
->visible_height
!= current_row
->visible_height
4262 || current_row
->overlapped_p
4263 || current_row
->mouse_face_p
4264 || current_row
->x
!= desired_row
->x
)
4266 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4268 if (desired_row
->used
[TEXT_AREA
])
4269 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4270 desired_row
->used
[TEXT_AREA
]);
4272 /* Clear to end of window. */
4273 rif
->clear_end_of_line (-1);
4276 /* This erases the cursor. We do this here because
4277 notice_overwritten_cursor cannot easily check this, which
4278 might indicate that the whole functionality of
4279 notice_overwritten_cursor would better be implemented here.
4280 On the other hand, we need notice_overwritten_cursor as long
4281 as mouse highlighting is done asynchronously outside of
4283 if (vpos
== w
->phys_cursor
.vpos
)
4284 w
->phys_cursor_on_p
= 0;
4289 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4290 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4291 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4292 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4294 /* If the desired row extends its face to the text area end,
4295 make sure we write at least one glyph, so that the face
4296 extension actually takes place. */
4297 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4300 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4304 /* Loop over glyphs that current and desired row may have
4310 /* Skip over glyphs that both rows have in common. These
4311 don't have to be written. We can't skip if the last
4312 current glyph overlaps the glyph to its right. For
4313 example, consider a current row of `if ' with the `f' in
4314 Courier bold so that it overlaps the ` ' to its right.
4315 If the desired row is ` ', we would skip over the space
4316 after the `if' and there would remain a pixel from the
4317 `f' on the screen. */
4318 if (overlapping_glyphs_p
&& i
> 0)
4320 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4323 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4325 can_skip_p
= right
== 0;
4331 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4333 x
+= desired_glyph
->pixel_width
;
4334 ++desired_glyph
, ++current_glyph
, ++i
;
4337 /* Consider the case that the current row contains "xxx
4338 ppp ggg" in italic Courier font, and the desired row
4339 is "xxx ggg". The character `p' has lbearing, `g'
4340 has not. The loop above will stop in front of the
4341 first `p' in the current row. If we would start
4342 writing glyphs there, we wouldn't erase the lbearing
4343 of the `p'. The rest of the lbearing problem is then
4344 taken care of by draw_glyphs. */
4345 if (overlapping_glyphs_p
4347 && i
< current_row
->used
[TEXT_AREA
]
4348 && (current_row
->used
[TEXT_AREA
]
4349 != desired_row
->used
[TEXT_AREA
]))
4353 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4355 while (left
> 0 && i
> 0)
4357 --i
, --desired_glyph
, --current_glyph
;
4358 x
-= desired_glyph
->pixel_width
;
4359 left
-= desired_glyph
->pixel_width
;
4364 /* Try to avoid writing the entire rest of the desired row
4365 by looking for a resync point. This mainly prevents
4366 mode line flickering in the case the mode line is in
4367 fixed-pitch font, which it usually will be. */
4368 if (i
< desired_row
->used
[TEXT_AREA
])
4370 int start_x
= x
, start_hpos
= i
;
4371 struct glyph
*start
= desired_glyph
;
4373 int skip_first_p
= !can_skip_p
;
4375 /* Find the next glyph that's equal again. */
4378 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4381 x
+= desired_glyph
->pixel_width
;
4382 current_x
+= current_glyph
->pixel_width
;
4383 ++desired_glyph
, ++current_glyph
, ++i
;
4387 if (i
== start_hpos
|| x
!= current_x
)
4391 desired_glyph
= start
;
4395 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4396 rif
->write_glyphs (start
, i
- start_hpos
);
4401 /* Write the rest. */
4402 if (i
< desired_row
->used
[TEXT_AREA
])
4404 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4405 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4409 /* Maybe clear to end of line. */
4410 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4412 /* If new row extends to the end of the text area, nothing
4413 has to be cleared, if and only if we did a write_glyphs
4414 above. This is made sure by setting desired_stop_pos
4415 appropriately above. */
4416 xassert (i
< desired_row
->used
[TEXT_AREA
]);
4418 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4420 /* If old row extends to the end of the text area, clear. */
4421 if (i
>= desired_row
->used
[TEXT_AREA
])
4422 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4423 desired_row
->pixel_width
);
4424 rif
->clear_end_of_line (-1);
4427 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4429 /* Otherwise clear to the end of the old row. Everything
4430 after that position should be clear already. */
4433 if (i
>= desired_row
->used
[TEXT_AREA
])
4434 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4435 desired_row
->pixel_width
);
4437 /* If cursor is displayed at the end of the line, make sure
4438 it's cleared. Nowadays we don't have a phys_cursor_glyph
4439 with which to erase the cursor (because this method
4440 doesn't work with lbearing/rbearing), so we must do it
4442 if (vpos
== w
->phys_cursor
.vpos
4443 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4445 w
->phys_cursor_on_p
= 0;
4449 x
= current_row
->pixel_width
;
4450 rif
->clear_end_of_line (x
);
4459 /* Update row VPOS in window W. Value is non-zero if display has been
4463 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4465 int vpos
, *mouse_face_overwritten_p
;
4467 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4468 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4471 /* Set the row being updated. This is important to let xterm.c
4472 know what line height values are in effect. */
4473 updated_row
= desired_row
;
4475 /* A row can be completely invisible in case a desired matrix was
4476 built with a vscroll and then make_cursor_line_fully_visible shifts
4477 the matrix. Make sure to make such rows current anyway, since
4478 we need the correct y-position, for example, in the current matrix. */
4479 if (desired_row
->mode_line_p
4480 || desired_row
->visible_height
> 0)
4482 xassert (desired_row
->enabled_p
);
4484 /* Update display of the left margin area, if there is one. */
4485 if (!desired_row
->full_width_p
4486 && !NILP (w
->left_margin_cols
))
4489 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4492 /* Update the display of the text area. */
4493 if (update_text_area (w
, vpos
))
4496 if (current_row
->mouse_face_p
)
4497 *mouse_face_overwritten_p
= 1;
4500 /* Update display of the right margin area, if there is one. */
4501 if (!desired_row
->full_width_p
4502 && !NILP (w
->right_margin_cols
))
4505 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4508 /* Draw truncation marks etc. */
4509 if (!current_row
->enabled_p
4510 || desired_row
->y
!= current_row
->y
4511 || desired_row
->visible_height
!= current_row
->visible_height
4512 || desired_row
->overlay_arrow_p
!= current_row
->overlay_arrow_p
4513 || desired_row
->truncated_on_left_p
!= current_row
->truncated_on_left_p
4514 || desired_row
->truncated_on_right_p
!= current_row
->truncated_on_right_p
4515 || desired_row
->continued_p
!= current_row
->continued_p
4516 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4517 || (desired_row
->indicate_empty_line_p
4518 != current_row
->indicate_empty_line_p
)
4519 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4520 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4521 rif
->after_update_window_line_hook (desired_row
);
4524 /* Update current_row from desired_row. */
4525 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4531 /* Set the cursor after an update of window W. This function may only
4532 be called from update_window. */
4535 set_window_cursor_after_update (w
)
4538 struct frame
*f
= XFRAME (w
->frame
);
4539 int cx
, cy
, vpos
, hpos
;
4541 /* Not intended for frame matrix updates. */
4542 xassert (FRAME_WINDOW_P (f
));
4544 if (cursor_in_echo_area
4545 && !NILP (echo_area_buffer
[0])
4546 /* If we are showing a message instead of the mini-buffer,
4547 show the cursor for the message instead. */
4548 && XWINDOW (minibuf_window
) == w
4549 && EQ (minibuf_window
, echo_area_window
)
4550 /* These cases apply only to the frame that contains
4551 the active mini-buffer window. */
4552 && FRAME_HAS_MINIBUF_P (f
)
4553 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4555 cx
= cy
= vpos
= hpos
= 0;
4557 if (cursor_in_echo_area
>= 0)
4559 /* If the mini-buffer is several lines high, find the last
4560 line that has any text on it. Note: either all lines
4561 are enabled or none. Otherwise we wouldn't be able to
4563 struct glyph_row
*row
, *last_row
;
4564 struct glyph
*glyph
;
4565 int yb
= window_text_bottom_y (w
);
4568 row
= w
->current_matrix
->rows
;
4569 while (row
->enabled_p
4570 && (last_row
== NULL
4571 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4573 if (row
->used
[TEXT_AREA
]
4574 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4581 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4582 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4584 while (last
> start
&& last
->charpos
< 0)
4587 for (glyph
= start
; glyph
< last
; ++glyph
)
4589 cx
+= glyph
->pixel_width
;
4594 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4602 hpos
= w
->cursor
.hpos
;
4603 vpos
= w
->cursor
.vpos
;
4606 /* Window cursor can be out of sync for horizontally split windows. */
4607 hpos
= max (0, hpos
);
4608 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4609 vpos
= max (0, vpos
);
4610 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4611 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4615 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4616 tree rooted at W. */
4619 set_window_update_flags (w
, on_p
)
4625 if (!NILP (w
->hchild
))
4626 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4627 else if (!NILP (w
->vchild
))
4628 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4630 w
->must_be_updated_p
= on_p
;
4632 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4638 /***********************************************************************
4639 Window-Based Scrolling
4640 ***********************************************************************/
4642 /* Structure describing rows in scrolling_window. */
4646 /* Number of occurrences of this row in desired and current matrix. */
4647 int old_uses
, new_uses
;
4649 /* Vpos of row in new matrix. */
4650 int new_line_number
;
4652 /* Bucket index of this row_entry in the hash table row_table. */
4655 /* The row described by this entry. */
4656 struct glyph_row
*row
;
4658 /* Hash collision chain. */
4659 struct row_entry
*next
;
4662 /* A pool to allocate row_entry structures from, and the size of the
4663 pool. The pool is reallocated in scrolling_window when we find
4664 that we need a larger one. */
4666 static struct row_entry
*row_entry_pool
;
4667 static int row_entry_pool_size
;
4669 /* Index of next free entry in row_entry_pool. */
4671 static int row_entry_idx
;
4673 /* The hash table used during scrolling, and the table's size. This
4674 table is used to quickly identify equal rows in the desired and
4677 static struct row_entry
**row_table
;
4678 static int row_table_size
;
4680 /* Vectors of pointers to row_entry structures belonging to the
4681 current and desired matrix, and the size of the vectors. */
4683 static struct row_entry
**old_lines
, **new_lines
;
4684 static int old_lines_size
, new_lines_size
;
4686 /* A pool to allocate run structures from, and its size. */
4688 static struct run
*run_pool
;
4689 static int runs_size
;
4691 /* A vector of runs of lines found during scrolling. */
4693 static struct run
**runs
;
4695 /* Add glyph row ROW to the scrolling hash table during the scrolling
4698 static INLINE
struct row_entry
*
4699 add_row_entry (w
, row
)
4701 struct glyph_row
*row
;
4703 struct row_entry
*entry
;
4704 int i
= row
->hash
% row_table_size
;
4706 entry
= row_table
[i
];
4707 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4708 entry
= entry
->next
;
4712 entry
= row_entry_pool
+ row_entry_idx
++;
4714 entry
->old_uses
= entry
->new_uses
= 0;
4715 entry
->new_line_number
= 0;
4717 entry
->next
= row_table
[i
];
4718 row_table
[i
] = entry
;
4725 /* Try to reuse part of the current display of W by scrolling lines.
4726 HEADER_LINE_P non-zero means W has a header line.
4728 The algorithm is taken from Communications of the ACM, Apr78 "A
4729 Technique for Isolating Differences Between Files." It should take
4732 A short outline of the steps of the algorithm
4734 1. Skip lines equal at the start and end of both matrices.
4736 2. Enter rows in the current and desired matrix into a symbol
4737 table, counting how often they appear in both matrices.
4739 3. Rows that appear exactly once in both matrices serve as anchors,
4740 i.e. we assume that such lines are likely to have been moved.
4742 4. Starting from anchor lines, extend regions to be scrolled both
4743 forward and backward.
4747 -1 if all rows were found to be equal.
4748 0 to indicate that we did not scroll the display, or
4749 1 if we did scroll. */
4752 scrolling_window (w
, header_line_p
)
4756 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4757 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4758 int yb
= window_text_bottom_y (w
);
4759 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4760 int nruns
, nbytes
, n
, run_idx
;
4761 struct row_entry
*entry
;
4763 /* Skip over rows equal at the start. */
4764 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4766 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4767 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4772 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4773 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4774 && row_equal_p (w
, c
, d
, 1))
4783 /* Give up if some rows in the desired matrix are not enabled. */
4784 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4787 first_old
= first_new
= i
;
4789 /* Set last_new to the index + 1 of the last enabled row in the
4792 while (i
< desired_matrix
->nrows
- 1
4793 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4794 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4797 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4802 /* Set last_old to the index + 1 of the last enabled row in the
4803 current matrix. We don't look at the enabled flag here because
4804 we plan to reuse part of the display even if other parts are
4807 while (i
< current_matrix
->nrows
- 1)
4809 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4818 /* Skip over rows equal at the bottom. */
4821 while (i
- 1 > first_new
4822 && j
- 1 > first_old
4823 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4824 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4825 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4827 MATRIX_ROW (desired_matrix
, i
- 1),
4828 MATRIX_ROW (current_matrix
, j
- 1), 1))
4833 /* Nothing to do if all rows are equal. */
4834 if (last_new
== first_new
)
4837 /* Reallocate vectors, tables etc. if necessary. */
4839 if (current_matrix
->nrows
> old_lines_size
)
4841 old_lines_size
= current_matrix
->nrows
;
4842 nbytes
= old_lines_size
* sizeof *old_lines
;
4843 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4846 if (desired_matrix
->nrows
> new_lines_size
)
4848 new_lines_size
= desired_matrix
->nrows
;
4849 nbytes
= new_lines_size
* sizeof *new_lines
;
4850 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4853 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4854 if (3 * n
> row_table_size
)
4856 row_table_size
= next_almost_prime (3 * n
);
4857 nbytes
= row_table_size
* sizeof *row_table
;
4858 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4859 bzero (row_table
, nbytes
);
4862 if (n
> row_entry_pool_size
)
4864 row_entry_pool_size
= n
;
4865 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4866 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4869 if (desired_matrix
->nrows
> runs_size
)
4871 runs_size
= desired_matrix
->nrows
;
4872 nbytes
= runs_size
* sizeof *runs
;
4873 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4874 nbytes
= runs_size
* sizeof *run_pool
;
4875 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4878 nruns
= run_idx
= 0;
4881 /* Add rows from the current and desired matrix to the hash table
4882 row_hash_table to be able to find equal ones quickly. */
4884 for (i
= first_old
; i
< last_old
; ++i
)
4886 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4888 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4889 old_lines
[i
] = entry
;
4893 old_lines
[i
] = NULL
;
4896 for (i
= first_new
; i
< last_new
; ++i
)
4898 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4899 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4901 entry
->new_line_number
= i
;
4902 new_lines
[i
] = entry
;
4905 /* Identify moves based on lines that are unique and equal
4906 in both matrices. */
4907 for (i
= first_old
; i
< last_old
;)
4909 && old_lines
[i
]->old_uses
== 1
4910 && old_lines
[i
]->new_uses
== 1)
4913 int new_line
= old_lines
[i
]->new_line_number
;
4914 struct run
*run
= run_pool
+ run_idx
++;
4917 run
->current_vpos
= i
;
4918 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4919 run
->desired_vpos
= new_line
;
4920 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4922 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4924 /* Extend backward. */
4927 while (j
> first_old
4929 && old_lines
[j
] == new_lines
[k
])
4931 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4932 --run
->current_vpos
;
4933 --run
->desired_vpos
;
4936 run
->desired_y
-= h
;
4937 run
->current_y
-= h
;
4941 /* Extend forward. */
4946 && old_lines
[j
] == new_lines
[k
])
4948 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4954 /* Insert run into list of all runs. Order runs by copied
4955 pixel lines. Note that we record runs that don't have to
4956 be copied because they are already in place. This is done
4957 because we can avoid calling update_window_line in this
4959 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4961 for (k
= nruns
; k
> j
; --k
)
4962 runs
[k
] = runs
[k
- 1];
4971 /* Do the moves. Do it in a way that we don't overwrite something
4972 we want to copy later on. This is not solvable in general
4973 because there is only one display and we don't have a way to
4974 exchange areas on this display. Example:
4976 +-----------+ +-----------+
4978 +-----------+ --> +-----------+
4980 +-----------+ +-----------+
4982 Instead, prefer bigger moves, and invalidate moves that would
4983 copy from where we copied to. */
4985 for (i
= 0; i
< nruns
; ++i
)
4986 if (runs
[i
]->nrows
> 0)
4988 struct run
*r
= runs
[i
];
4990 /* Copy on the display. */
4991 if (r
->current_y
!= r
->desired_y
)
4993 rif
->scroll_run_hook (w
, r
);
4995 /* Invalidate runs that copy from where we copied to. */
4996 for (j
= i
+ 1; j
< nruns
; ++j
)
4998 struct run
*p
= runs
[j
];
5000 if ((p
->current_y
>= r
->desired_y
5001 && p
->current_y
< r
->desired_y
+ r
->height
)
5002 || (p
->current_y
+ p
->height
>= r
->desired_y
5003 && (p
->current_y
+ p
->height
5004 < r
->desired_y
+ r
->height
)))
5009 /* Assign matrix rows. */
5010 for (j
= 0; j
< r
->nrows
; ++j
)
5012 struct glyph_row
*from
, *to
;
5013 int to_overlapped_p
;
5015 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5016 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5017 to_overlapped_p
= to
->overlapped_p
;
5018 assign_row (to
, from
);
5019 to
->enabled_p
= 1, from
->enabled_p
= 0;
5020 to
->overlapped_p
= to_overlapped_p
;
5024 /* Clear the hash table, for the next time. */
5025 for (i
= 0; i
< row_entry_idx
; ++i
)
5026 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5028 /* Value is non-zero to indicate that we scrolled the display. */
5034 /************************************************************************
5036 ************************************************************************/
5038 /* Update the desired frame matrix of frame F.
5040 FORCE_P non-zero means that the update should not be stopped by
5041 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5042 should not be tried.
5044 Value is non-zero if update was stopped due to pending input. */
5047 update_frame_1 (f
, force_p
, inhibit_id_p
)
5052 /* Frame matrices to work on. */
5053 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5054 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5057 int preempt_count
= baud_rate
/ 2400 + 1;
5058 extern int input_pending
;
5060 xassert (current_matrix
&& desired_matrix
);
5062 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5063 calculate_costs (f
);
5065 if (preempt_count
<= 0)
5068 if (redisplay_dont_pause
)
5070 else if (!force_p
&& detect_input_pending ())
5076 /* If we cannot insert/delete lines, it's no use trying it. */
5077 if (!TTY_LINE_INS_DEL_OK (FRAME_TTY (f
)))
5080 /* See if any of the desired lines are enabled; don't compute for
5081 i/d line if just want cursor motion. */
5082 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5083 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5086 /* Try doing i/d line, if not yet inhibited. */
5087 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5088 force_p
|= scrolling (f
);
5090 /* Update the individual lines as needed. Do bottom line first. */
5091 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5092 update_frame_line (f
, desired_matrix
->nrows
- 1);
5094 /* Now update the rest of the lines. */
5095 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5097 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5099 if (FRAME_TERMCAP_P (f
))
5101 /* Flush out every so many lines.
5102 Also flush out if likely to have more than 1k buffered
5103 otherwise. I'm told that some telnet connections get
5104 really screwed by more than 1k output at once. */
5105 int outq
= PENDING_OUTPUT_COUNT (TTY_OUTPUT (FRAME_TTY (f
)));
5107 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5109 fflush (TTY_OUTPUT (FRAME_TTY (f
)));
5110 if (preempt_count
== 1)
5112 #ifdef EMACS_OUTQSIZE
5113 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5114 /* Probably not a tty. Ignore the error and reset
5116 outq
= PENDING_OUTPUT_COUNT (TTY_OUTPUT (FRAME_TTY (f
)));
5119 if (baud_rate
<= outq
&& baud_rate
> 0)
5120 sleep (outq
/ baud_rate
);
5125 if ((i
- 1) % preempt_count
== 0)
5126 detect_input_pending ();
5128 update_frame_line (f
, i
);
5132 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5134 /* Now just clean up termcap drivers and set cursor, etc. */
5137 if ((cursor_in_echo_area
5138 /* If we are showing a message instead of the mini-buffer,
5139 show the cursor for the message instead of for the
5140 (now hidden) mini-buffer contents. */
5141 || (EQ (minibuf_window
, selected_window
)
5142 && EQ (minibuf_window
, echo_area_window
)
5143 && !NILP (echo_area_buffer
[0])))
5144 /* These cases apply only to the frame that contains
5145 the active mini-buffer window. */
5146 && FRAME_HAS_MINIBUF_P (f
)
5147 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5149 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5152 if (cursor_in_echo_area
< 0)
5154 /* Negative value of cursor_in_echo_area means put
5155 cursor at beginning of line. */
5161 /* Positive value of cursor_in_echo_area means put
5162 cursor at the end of the prompt. If the mini-buffer
5163 is several lines high, find the last line that has
5165 row
= FRAME_LINES (f
);
5171 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5173 /* Frame rows are filled up with spaces that
5174 must be ignored here. */
5175 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5177 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5178 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5181 && (last
- 1)->charpos
< 0)
5187 while (row
> top
&& col
== 0);
5189 /* Make sure COL is not out of range. */
5190 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5192 /* If we have another row, advance cursor into it. */
5193 if (row
< FRAME_LINES (f
) - 1)
5195 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5198 /* Otherwise move it back in range. */
5200 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5204 cursor_to (row
, col
);
5208 /* We have only one cursor on terminal frames. Use it to
5209 display the cursor of the selected window. */
5210 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5211 if (w
->cursor
.vpos
>= 0
5212 /* The cursor vpos may be temporarily out of bounds
5213 in the following situation: There is one window,
5214 with the cursor in the lower half of it. The window
5215 is split, and a message causes a redisplay before
5216 a new cursor position has been computed. */
5217 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5219 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5220 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5222 if (INTEGERP (w
->left_margin_cols
))
5223 x
+= XFASTINT (w
->left_margin_cols
);
5225 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5233 clear_desired_matrices (f
);
5238 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5242 struct frame
*frame
;
5244 int unchanged_at_top
, unchanged_at_bottom
;
5247 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5248 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5249 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5250 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5252 int free_at_end_vpos
= FRAME_LINES (frame
);
5253 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5254 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5256 if (!current_matrix
)
5259 /* Compute hash codes of all the lines. Also calculate number of
5260 changed lines, number of unchanged lines at the beginning, and
5261 number of unchanged lines at the end. */
5263 unchanged_at_top
= 0;
5264 unchanged_at_bottom
= FRAME_LINES (frame
);
5265 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5267 /* Give up on this scrolling if some old lines are not enabled. */
5268 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5270 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5271 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5273 /* This line cannot be redrawn, so don't let scrolling mess it. */
5274 new_hash
[i
] = old_hash
[i
];
5275 #define INFINITY 1000000 /* Taken from scroll.c */
5276 draw_cost
[i
] = INFINITY
;
5280 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5281 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5284 if (old_hash
[i
] != new_hash
[i
])
5287 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5289 else if (i
== unchanged_at_top
)
5291 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5294 /* If changed lines are few, don't allow preemption, don't scroll. */
5295 if ((!TTY_SCROLL_REGION_OK (FRAME_TTY (frame
))
5296 && changed_lines
< baud_rate
/ 2400)
5297 || unchanged_at_bottom
== FRAME_LINES (frame
))
5300 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5301 - unchanged_at_bottom
);
5303 if (TTY_SCROLL_REGION_OK (FRAME_TTY (frame
)))
5304 free_at_end_vpos
-= unchanged_at_bottom
;
5305 else if (TTY_MEMORY_BELOW_FRAME (FRAME_TTY (frame
)))
5306 free_at_end_vpos
= -1;
5308 /* If large window, fast terminal and few lines in common between
5309 current frame and desired frame, don't bother with i/d calc. */
5310 if (!TTY_SCROLL_REGION_OK (FRAME_TTY (frame
))
5311 && window_size
>= 18 && baud_rate
> 2400
5313 10 * scrolling_max_lines_saved (unchanged_at_top
,
5314 FRAME_LINES (frame
) - unchanged_at_bottom
,
5315 old_hash
, new_hash
, draw_cost
)))
5318 if (window_size
< 2)
5321 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5322 draw_cost
+ unchanged_at_top
- 1,
5323 old_draw_cost
+ unchanged_at_top
- 1,
5324 old_hash
+ unchanged_at_top
- 1,
5325 new_hash
+ unchanged_at_top
- 1,
5326 free_at_end_vpos
- unchanged_at_top
);
5332 /* Count the number of blanks at the start of the vector of glyphs R
5333 which is LEN glyphs long. */
5336 count_blanks (r
, len
)
5342 for (i
= 0; i
< len
; ++i
)
5343 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5350 /* Count the number of glyphs in common at the start of the glyph
5351 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5352 of STR2. Value is the number of equal glyphs equal at the start. */
5355 count_match (str1
, end1
, str2
, end2
)
5356 struct glyph
*str1
, *end1
, *str2
, *end2
;
5358 struct glyph
*p1
= str1
;
5359 struct glyph
*p2
= str2
;
5363 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5370 /* Char insertion/deletion cost vector, from term.c */
5372 extern int *char_ins_del_vector
;
5373 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5376 /* Perform a frame-based update on line VPOS in frame FRAME. */
5379 update_frame_line (f
, vpos
)
5383 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5385 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5386 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5387 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5388 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5389 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5390 int must_write_whole_line_p
;
5391 int write_spaces_p
= TTY_MUST_WRITE_SPACES (FRAME_TTY (f
));
5392 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5393 != FACE_TTY_DEFAULT_BG_COLOR
);
5395 if (colored_spaces_p
)
5398 /* Current row not enabled means it has unknown contents. We must
5399 write the whole desired line in that case. */
5400 must_write_whole_line_p
= !current_row
->enabled_p
;
5401 if (must_write_whole_line_p
)
5408 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5409 olen
= current_row
->used
[TEXT_AREA
];
5411 /* Ignore trailing spaces, if we can. */
5412 if (!write_spaces_p
)
5413 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5417 current_row
->enabled_p
= 1;
5418 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5420 /* If desired line is empty, just clear the line. */
5421 if (!desired_row
->enabled_p
)
5427 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5428 nlen
= desired_row
->used
[TEXT_AREA
];
5429 nend
= nbody
+ nlen
;
5431 /* If display line has unknown contents, write the whole line. */
5432 if (must_write_whole_line_p
)
5434 /* Ignore spaces at the end, if we can. */
5435 if (!write_spaces_p
)
5436 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5439 /* Write the contents of the desired line. */
5442 cursor_to (vpos
, 0);
5443 write_glyphs (nbody
, nlen
);
5446 /* Don't call clear_end_of_line if we already wrote the whole
5447 line. The cursor will not be at the right margin in that
5448 case but in the line below. */
5449 if (nlen
< FRAME_TOTAL_COLS (f
))
5451 cursor_to (vpos
, nlen
);
5452 clear_end_of_line (FRAME_TOTAL_COLS (f
));
5455 /* Make sure we are in the right row, otherwise cursor movement
5456 with cmgoto might use `ch' in the wrong row. */
5457 cursor_to (vpos
, 0);
5459 make_current (desired_matrix
, current_matrix
, vpos
);
5463 /* Pretend trailing spaces are not there at all,
5464 unless for one reason or another we must write all spaces. */
5465 if (!write_spaces_p
)
5466 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5469 /* If there's no i/d char, quickly do the best we can without it. */
5470 if (!TTY_CHAR_INS_DEL_OK (FRAME_TTY (f
)))
5474 /* Find the first glyph in desired row that doesn't agree with
5475 a glyph in the current row, and write the rest from there on. */
5476 for (i
= 0; i
< nlen
; i
++)
5478 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5480 /* Find the end of the run of different glyphs. */
5484 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5485 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5488 /* Output this run of non-matching chars. */
5489 cursor_to (vpos
, i
);
5490 write_glyphs (nbody
+ i
, j
- i
);
5493 /* Now find the next non-match. */
5497 /* Clear the rest of the line, or the non-clear part of it. */
5500 cursor_to (vpos
, nlen
);
5501 clear_end_of_line (olen
);
5504 /* Make current row = desired row. */
5505 make_current (desired_matrix
, current_matrix
, vpos
);
5509 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5510 characters in a row. */
5514 /* If current line is blank, skip over initial spaces, if
5515 possible, and write the rest. */
5519 nsp
= count_blanks (nbody
, nlen
);
5523 cursor_to (vpos
, nsp
);
5524 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
5527 /* Exchange contents between current_frame and new_frame. */
5528 make_current (desired_matrix
, current_matrix
, vpos
);
5532 /* Compute number of leading blanks in old and new contents. */
5533 osp
= count_blanks (obody
, olen
);
5534 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5536 /* Compute number of matching chars starting with first non-blank. */
5537 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5538 nbody
+ nsp
, nbody
+ nlen
);
5540 /* Spaces in new match implicit space past the end of old. */
5541 /* A bug causing this to be a no-op was fixed in 18.29. */
5542 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5545 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5549 /* Avoid doing insert/delete char
5550 just cause number of leading spaces differs
5551 when the following text does not match. */
5552 if (begmatch
== 0 && osp
!= nsp
)
5553 osp
= nsp
= min (osp
, nsp
);
5555 /* Find matching characters at end of line */
5558 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5560 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5565 endmatch
= obody
+ olen
- op1
;
5567 /* tem gets the distance to insert or delete.
5568 endmatch is how many characters we save by doing so.
5571 tem
= (nlen
- nsp
) - (olen
- osp
);
5573 && (!TTY_CHAR_INS_DEL_OK (FRAME_TTY (f
))
5574 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5577 /* nsp - osp is the distance to insert or delete.
5578 If that is nonzero, begmatch is known to be nonzero also.
5579 begmatch + endmatch is how much we save by doing the ins/del.
5583 && (!TTY_CHAR_INS_DEL_OK (FRAME_TTY (f
))
5584 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5588 osp
= nsp
= min (osp
, nsp
);
5591 /* Now go through the line, inserting, writing and
5592 deleting as appropriate. */
5596 cursor_to (vpos
, nsp
);
5597 delete_glyphs (osp
- nsp
);
5601 /* If going to delete chars later in line
5602 and insert earlier in the line,
5603 must delete first to avoid losing data in the insert */
5604 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5606 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
5607 delete_glyphs (olen
+ nsp
- osp
- nlen
);
5608 olen
= nlen
- (nsp
- osp
);
5610 cursor_to (vpos
, osp
);
5611 insert_glyphs (0, nsp
- osp
);
5615 tem
= nsp
+ begmatch
+ endmatch
;
5616 if (nlen
!= tem
|| olen
!= tem
)
5618 if (!endmatch
|| nlen
== olen
)
5620 /* If new text being written reaches right margin, there is
5621 no need to do clear-to-eol at the end of this function
5622 (and it would not be safe, since cursor is not going to
5623 be "at the margin" after the text is done). */
5624 if (nlen
== FRAME_TOTAL_COLS (f
))
5627 /* Function write_glyphs is prepared to do nothing
5628 if passed a length <= 0. Check it here to avoid
5629 unnecessary cursor movement. */
5632 cursor_to (vpos
, nsp
+ begmatch
);
5633 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5636 else if (nlen
> olen
)
5638 /* Here, we used to have the following simple code:
5639 ----------------------------------------
5640 write_glyphs (nbody + nsp + begmatch, olen - tem);
5641 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5642 ----------------------------------------
5643 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5644 is a padding glyph. */
5645 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5648 cursor_to (vpos
, nsp
+ begmatch
);
5650 /* Calculate columns we can actually overwrite. */
5651 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5653 write_glyphs (nbody
+ nsp
+ begmatch
, out
);
5655 /* If we left columns to be overwritten, we must delete them. */
5656 del
= olen
- tem
- out
;
5658 delete_glyphs (del
);
5660 /* At last, we insert columns not yet written out. */
5661 insert_glyphs (nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5664 else if (olen
> nlen
)
5666 cursor_to (vpos
, nsp
+ begmatch
);
5667 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
5668 delete_glyphs (olen
- nlen
);
5674 /* If any unerased characters remain after the new line, erase them. */
5677 cursor_to (vpos
, nlen
);
5678 clear_end_of_line (olen
);
5681 /* Exchange contents between current_frame and new_frame. */
5682 make_current (desired_matrix
, current_matrix
, vpos
);
5687 /***********************************************************************
5688 X/Y Position -> Buffer Position
5689 ***********************************************************************/
5691 /* Determine what's under window-relative pixel position (*X, *Y).
5692 Return in *OBJECT the object (string or buffer) that's there.
5693 Return in *POS the position in that object. Adjust *X and *Y
5694 to character positions. */
5697 buffer_posn_from_coords (w
, x
, y
, dx
, dy
, object
, pos
)
5701 Lisp_Object
*object
;
5702 struct display_pos
*pos
;
5705 struct buffer
*old_current_buffer
= current_buffer
;
5706 struct text_pos startp
;
5707 struct glyph_row
*row
;
5711 current_buffer
= XBUFFER (w
->buffer
);
5712 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5713 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5714 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5715 start_display (&it
, w
, startp
);
5717 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5718 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5719 MOVE_TO_X
| MOVE_TO_Y
);
5721 /* Add extra (default width) columns if clicked after EOL. */
5722 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5724 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5726 current_buffer
= old_current_buffer
;
5728 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5729 *dy
= *y
- it
.current_y
;
5731 #ifdef HAVE_WINDOW_SYSTEM
5732 if (it
.what
== IT_IMAGE
5733 && (img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5734 && !NILP (img
->spec
))
5735 *object
= img
->spec
;
5738 *object
= STRINGP (it
.string
) ? it
.string
: w
->buffer
;
5745 /* Value is the string under window-relative coordinates X/Y in the
5746 mode or header line of window W, or nil if none. MODE_LINE_P non-zero
5747 means look at the mode line. *CHARPOS is set to the position in
5748 the string returned. */
5751 mode_line_string (w
, x
, y
, dx
, dy
, part
, charpos
)
5755 enum window_part part
;
5758 struct glyph_row
*row
;
5759 struct glyph
*glyph
, *end
;
5761 Lisp_Object string
= Qnil
;
5763 if (part
== ON_MODE_LINE
)
5764 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5766 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5768 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5770 if (row
->mode_line_p
&& row
->enabled_p
)
5772 /* Find the glyph under X. If we find one with a string object,
5773 it's the one we were looking for. */
5774 glyph
= row
->glyphs
[TEXT_AREA
];
5775 end
= glyph
+ row
->used
[TEXT_AREA
];
5776 for (x0
= *x
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5777 x0
-= glyph
->pixel_width
;
5778 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5781 string
= glyph
->object
;
5782 *charpos
= glyph
->charpos
;
5785 /* Add extra (default width) columns if clicked after EOL. */
5786 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5804 /* Value is the string under window-relative coordinates X/Y in either
5805 marginal area, or nil if none. *CHARPOS is set to the position in
5806 the string returned. */
5809 marginal_area_string (w
, x
, y
, dx
, dy
, part
, charpos
)
5813 enum window_part part
;
5816 struct glyph_row
*row
= w
->current_matrix
->rows
;
5817 struct glyph
*glyph
, *end
;
5818 int x0
, y0
, i
, wy
= *y
;
5820 Lisp_Object string
= Qnil
;
5822 if (part
== ON_LEFT_MARGIN
)
5823 area
= LEFT_MARGIN_AREA
;
5824 else if (part
== ON_RIGHT_MARGIN
)
5825 area
= RIGHT_MARGIN_AREA
;
5829 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5830 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5833 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5837 /* Find the glyph under X. If we find one with a string object,
5838 it's the one we were looking for. */
5839 if (area
== RIGHT_MARGIN_AREA
)
5840 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5841 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5842 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5843 + window_box_width (w
, LEFT_MARGIN_AREA
)
5844 + window_box_width (w
, TEXT_AREA
));
5846 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5847 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5850 glyph
= row
->glyphs
[area
];
5851 end
= glyph
+ row
->used
[area
];
5852 for (x0
= *x
- x0
; glyph
< end
&& x0
> glyph
->pixel_width
; ++glyph
)
5853 x0
-= glyph
->pixel_width
;
5854 *x
= glyph
- row
->glyphs
[area
];
5857 string
= glyph
->object
;
5858 *charpos
= glyph
->charpos
;
5861 /* Add extra (default width) columns if clicked after EOL. */
5862 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5880 /***********************************************************************
5881 Changing Frame Sizes
5882 ***********************************************************************/
5887 window_change_signal (signalnum
) /* If we don't have an argument, */
5888 int signalnum
; /* some compilers complain in signal calls. */
5894 int old_errno
= errno
;
5896 struct tty_output
*tty
;
5898 /* The frame size change obviously applies to a single
5899 termcap-controlled terminal, but we can't decide which.
5900 Therefore, we resize the frames corresponding to each tty.
5902 XXX In fact we only get the signal for the initial terminal.
5904 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
5906 get_tty_size (tty
, &width
, &height
);
5909 Lisp_Object tail
, frame
;
5911 FOR_EACH_FRAME (tail
, frame
)
5913 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
5915 /* Record the new sizes, but don't reallocate the data structures
5916 now. Let that be done later outside of the signal handler. */
5917 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5924 signal (SIGWINCH
, window_change_signal
);
5927 #endif /* SIGWINCH */
5930 /* Do any change in frame size that was requested by a signal. SAFE
5931 non-zero means this function is called from a place where it is
5932 safe to change frame sizes while a redisplay is in progress. */
5935 do_pending_window_change (safe
)
5938 /* If window_change_signal should have run before, run it now. */
5939 if (redisplaying_p
&& !safe
)
5942 while (delayed_size_change
)
5944 Lisp_Object tail
, frame
;
5946 delayed_size_change
= 0;
5948 FOR_EACH_FRAME (tail
, frame
)
5950 struct frame
*f
= XFRAME (frame
);
5952 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
5953 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
5960 /* Change the frame height and/or width. Values may be given as zero to
5961 indicate no change is to take place.
5963 If DELAY is non-zero, then assume we're being called from a signal
5964 handler, and queue the change for later - perhaps the next
5965 redisplay. Since this tries to resize windows, we can't call it
5966 from a signal handler.
5968 SAFE non-zero means this function is called from a place where it's
5969 safe to change frame sizes while a redisplay is in progress. */
5972 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5973 register struct frame
*f
;
5974 int newheight
, newwidth
, pretend
, delay
, safe
;
5976 Lisp_Object tail
, frame
;
5978 if (FRAME_MSDOS_P (f
))
5980 /* On MS-DOS, all frames use the same screen, so a change in
5981 size affects all frames. Termcap now supports multiple
5983 FOR_EACH_FRAME (tail
, frame
)
5984 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5985 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5986 pretend
, delay
, safe
);
5989 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5993 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
5994 register struct frame
*f
;
5995 int newheight
, newwidth
, pretend
, delay
, safe
;
5997 int new_frame_total_cols
;
5998 int count
= SPECPDL_INDEX ();
6000 /* If we can't deal with the change now, queue it for later. */
6001 if (delay
|| (redisplaying_p
&& !safe
))
6003 f
->new_text_lines
= newheight
;
6004 f
->new_text_cols
= newwidth
;
6005 delayed_size_change
= 1;
6009 /* This size-change overrides any pending one for this frame. */
6010 f
->new_text_lines
= 0;
6011 f
->new_text_cols
= 0;
6013 /* If an argument is zero, set it to the current value. */
6015 newheight
= FRAME_LINES (f
);
6017 newwidth
= FRAME_COLS (f
);
6019 /* Compute width of windows in F.
6020 This is the width of the frame without vertical scroll bars. */
6021 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6023 /* Round up to the smallest acceptable size. */
6024 check_frame_size (f
, &newheight
, &newwidth
);
6026 /* If we're not changing the frame size, quit now. */
6027 if (newheight
== FRAME_LINES (f
)
6028 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6034 /* We only can set screen dimensions to certain values supported
6035 by our video hardware. Try to find the smallest size greater
6036 or equal to the requested dimensions. */
6037 dos_set_window_size (&newheight
, &newwidth
);
6040 if (newheight
!= FRAME_LINES (f
))
6042 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6044 /* Frame has both root and mini-buffer. */
6045 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6046 FRAME_TOP_MARGIN (f
));
6047 set_window_height (FRAME_ROOT_WINDOW (f
),
6050 - FRAME_TOP_MARGIN (f
)),
6052 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6054 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6057 /* Frame has just one top-level window. */
6058 set_window_height (FRAME_ROOT_WINDOW (f
),
6059 newheight
- FRAME_TOP_MARGIN (f
), 0);
6061 if (FRAME_TERMCAP_P (f
) && !pretend
)
6062 FrameRows
= newheight
;
6065 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6067 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 0);
6068 if (FRAME_HAS_MINIBUF_P (f
))
6069 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6071 if (FRAME_TERMCAP_P (f
) && !pretend
)
6072 FrameCols
= newwidth
;
6074 if (WINDOWP (f
->tool_bar_window
))
6075 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6078 FRAME_LINES (f
) = newheight
;
6079 SET_FRAME_COLS (f
, newwidth
);
6082 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6083 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6085 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6087 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6088 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6089 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6090 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6094 calculate_costs (f
);
6095 SET_FRAME_GARBAGED (f
);
6100 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6102 /* This isn't quite a no-op: it runs window-configuration-change-hook. */
6103 Fset_window_buffer (FRAME_SELECTED_WINDOW (f
),
6104 XWINDOW (FRAME_SELECTED_WINDOW (f
))->buffer
, Qt
);
6106 unbind_to (count
, Qnil
);
6111 /***********************************************************************
6112 Terminal Related Lisp Functions
6113 ***********************************************************************/
6115 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6116 1, 1, "FOpen termscript file: ",
6117 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6118 FILE = nil means just close any termscript file currently open. */)
6122 if (TTY_TERMSCRIPT (CURTTY ()) != 0)
6123 fclose (TTY_TERMSCRIPT (CURTTY ()));
6124 TTY_TERMSCRIPT (CURTTY ()) = 0;
6128 file
= Fexpand_file_name (file
, Qnil
);
6129 TTY_TERMSCRIPT (CURTTY ()) = fopen (SDATA (file
), "w");
6130 if (TTY_TERMSCRIPT (CURTTY ()) == 0)
6131 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6137 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6138 Ssend_string_to_terminal
, 1, 1, 0,
6139 doc
: /* Send STRING to the terminal without alteration.
6140 Control characters in STRING will have terminal-dependent effects. */)
6144 /* ??? Perhaps we should do something special for multibyte strings here. */
6145 CHECK_STRING (string
);
6146 if (TTY_TERMSCRIPT (CURTTY ()))
6148 fwrite (SDATA (string
), 1, SBYTES (string
),
6149 TTY_TERMSCRIPT (CURTTY ()));
6150 fflush (TTY_TERMSCRIPT (CURTTY ()));
6152 fwrite (SDATA (string
), 1, SBYTES (string
),
6153 TTY_OUTPUT (CURTTY ()));
6154 fflush (TTY_OUTPUT (CURTTY ()));
6159 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6160 doc
: /* Beep, or flash the screen.
6161 Also, unless an argument is given,
6162 terminate any keyboard macro currently executing. */)
6172 fflush (TTY_OUTPUT (CURTTY ()));
6185 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6186 error ("Keyboard macro terminated by a command ringing the bell");
6189 fflush (TTY_OUTPUT (CURTTY ()));
6194 /***********************************************************************
6196 ***********************************************************************/
6198 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6199 doc
: /* Pause, without updating display, for SECONDS seconds.
6200 SECONDS may be a floating-point value, meaning that you can wait for a
6201 fraction of a second. Optional second arg MILLISECONDS specifies an
6202 additional wait period, in milliseconds; this may be useful if your
6203 Emacs was built without floating point support.
6204 \(Not all operating systems support waiting for a fraction of a second.) */)
6205 (seconds
, milliseconds
)
6206 Lisp_Object seconds
, milliseconds
;
6210 if (NILP (milliseconds
))
6211 XSETINT (milliseconds
, 0);
6213 CHECK_NUMBER (milliseconds
);
6214 usec
= XINT (milliseconds
) * 1000;
6217 double duration
= extract_float (seconds
);
6218 sec
= (int) duration
;
6219 usec
+= (duration
- sec
) * 1000000;
6222 #ifndef EMACS_HAS_USECS
6223 if (sec
== 0 && usec
!= 0)
6224 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6227 /* Assure that 0 <= usec < 1000000. */
6230 /* We can't rely on the rounding being correct if usec is negative. */
6231 if (-1000000 < usec
)
6232 sec
--, usec
+= 1000000;
6234 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6237 sec
+= usec
/ 1000000, usec
%= 1000000;
6239 if (sec
< 0 || (sec
== 0 && usec
== 0))
6245 XSETFASTINT (zero
, 0);
6246 wait_reading_process_input (sec
, usec
, zero
, 0);
6249 /* We should always have wait_reading_process_input; we have a dummy
6250 implementation for systems which don't support subprocesses. */
6252 /* No wait_reading_process_input */
6259 /* The reason this is done this way
6260 (rather than defined (H_S) && defined (H_T))
6261 is because the VMS preprocessor doesn't grok `defined'. */
6263 EMACS_GET_TIME (end_time
);
6264 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
6265 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6269 EMACS_GET_TIME (timeout
);
6270 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6271 if (EMACS_TIME_NEG_P (timeout
)
6272 || !select (1, 0, 0, 0, &timeout
))
6275 #else /* not HAVE_SELECT */
6277 #endif /* HAVE_SELECT */
6278 #endif /* not VMS */
6281 #endif /* no subprocesses */
6287 /* This is just like wait_reading_process_input, except that
6288 it does the redisplay.
6290 It's also much like Fsit_for, except that it can be used for
6291 waiting for input as well. */
6294 sit_for (sec
, usec
, reading
, display
, initial_display
)
6295 int sec
, usec
, reading
, display
, initial_display
;
6297 Lisp_Object read_kbd
;
6299 swallow_events (display
);
6301 if (detect_input_pending_run_timers (display
) || !NILP (Vexecuting_macro
))
6304 if (initial_display
)
6305 redisplay_preserve_echo_area (2);
6307 if (sec
== 0 && usec
== 0)
6314 XSETINT (read_kbd
, reading
? -1 : 1);
6315 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
6317 return detect_input_pending () ? Qnil
: Qt
;
6321 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
6322 doc
: /* Perform redisplay, then wait for SECONDS seconds or until input is available.
6323 SECONDS may be a floating-point value, meaning that you can wait for a
6324 fraction of a second.
6325 \(Not all operating systems support waiting for a fraction of a second.)
6326 Optional arg NODISP non-nil means don't redisplay, just wait for input.
6327 Redisplay is preempted as always if input arrives, and does not happen
6328 if input is available before it starts.
6329 Value is t if waited the full time with no input arriving.
6331 An obsolete but still supported form is
6332 \(sit-for SECONDS &optional MILLISECONDS NODISP)
6333 Where the optional arg MILLISECONDS specifies an additional wait period,
6334 in milliseconds; this was useful when Emacs was built without
6335 floating point support.
6336 usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */)
6338 /* The `old-nodisp' stuff is there so that the arglist has the correct
6339 length. Otherwise, `defdvice' will redefine it with fewer args. */
6340 (seconds
, milliseconds
, nodisp
)
6341 Lisp_Object seconds
, milliseconds
, nodisp
;
6345 if (NILP (nodisp
) && !NUMBERP (milliseconds
))
6347 nodisp
= milliseconds
;
6348 milliseconds
= Qnil
;
6351 if (NILP (milliseconds
))
6352 XSETINT (milliseconds
, 0);
6354 CHECK_NUMBER (milliseconds
);
6355 usec
= XINT (milliseconds
) * 1000;
6358 double duration
= extract_float (seconds
);
6359 sec
= (int) duration
;
6360 usec
+= (duration
- sec
) * 1000000;
6363 #ifndef EMACS_HAS_USECS
6364 if (usec
!= 0 && sec
== 0)
6365 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
6368 return sit_for (sec
, usec
, 0, NILP (nodisp
), NILP (nodisp
));
6373 /***********************************************************************
6374 Other Lisp Functions
6375 ***********************************************************************/
6377 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6378 session's frames, frame names, buffers, buffer-read-only flags, and
6379 buffer-modified-flags, and a trailing sentinel (so we don't need to
6380 add length checks). */
6382 static Lisp_Object frame_and_buffer_state
;
6385 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6386 Sframe_or_buffer_changed_p
, 0, 0, 0,
6387 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6388 The state variable is an internal vector containing all frames and buffers,
6389 aside from buffers whose names start with space,
6390 along with the buffers' read-only and modified flags, which allows a fast
6391 check to see whether the menu bars might need to be recomputed.
6392 If this function returns non-nil, it updates the internal vector to reflect
6393 the current state. */)
6396 Lisp_Object tail
, frame
, buf
;
6400 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6401 FOR_EACH_FRAME (tail
, frame
)
6403 if (!EQ (*vecp
++, frame
))
6405 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6408 /* Check that the buffer info matches.
6409 No need to test for the end of the vector
6410 because the last element of the vector is lambda
6411 and that will always cause a mismatch. */
6412 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6414 buf
= XCDR (XCAR (tail
));
6415 /* Ignore buffers that aren't included in buffer lists. */
6416 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6418 if (!EQ (*vecp
++, buf
))
6420 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6422 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6425 /* Detect deletion of a buffer at the end of the list. */
6426 if (EQ (*vecp
, Qlambda
))
6429 /* Start with 1 so there is room for at least one lambda at the end. */
6431 FOR_EACH_FRAME (tail
, frame
)
6433 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6435 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
6436 if (n
> XVECTOR (frame_and_buffer_state
)->size
6437 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
6438 /* Add 20 extra so we grow it less often. */
6439 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6440 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
6441 FOR_EACH_FRAME (tail
, frame
)
6444 *vecp
++ = XFRAME (frame
)->name
;
6446 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6448 buf
= XCDR (XCAR (tail
));
6449 /* Ignore buffers that aren't included in buffer lists. */
6450 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6453 *vecp
++ = XBUFFER (buf
)->read_only
;
6454 *vecp
++ = Fbuffer_modified_p (buf
);
6456 /* Fill up the vector with lambdas (always at least one). */
6458 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6459 < XVECTOR (frame_and_buffer_state
)->size
)
6461 /* Make sure we didn't overflow the vector. */
6462 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
6463 > XVECTOR (frame_and_buffer_state
)->size
)
6470 /***********************************************************************
6472 ***********************************************************************/
6474 /* Initialization done when Emacs fork is started, before doing stty.
6475 Determine terminal type and set terminal_driver. Then invoke its
6476 decoding routine to set up variables in the terminal package. */
6481 char *terminal_type
;
6483 #ifdef HAVE_X_WINDOWS
6484 extern int display_arg
;
6487 /* Construct the space glyph. */
6488 space_glyph
.type
= CHAR_GLYPH
;
6489 SET_CHAR_GLYPH_FROM_GLYPH (space_glyph
, ' ');
6490 space_glyph
.charpos
= -1;
6494 cursor_in_echo_area
= 0;
6495 terminal_type
= (char *) 0;
6497 /* Now is the time to initialize this; it's used by init_sys_modes
6499 Vwindow_system
= Qnil
;
6501 /* If the user wants to use a window system, we shouldn't bother
6502 initializing the terminal. This is especially important when the
6503 terminal is so dumb that emacs gives up before and doesn't bother
6504 using the window system.
6506 If the DISPLAY environment variable is set and nonempty,
6507 try to use X, and die with an error message if that doesn't work. */
6509 #ifdef HAVE_X_WINDOWS
6514 display
= getenv ("DECW$DISPLAY");
6516 display
= getenv ("DISPLAY");
6519 display_arg
= (display
!= 0 && *display
!= 0);
6522 if (!inhibit_window_system
&& display_arg
6528 Vwindow_system
= intern ("x");
6530 Vwindow_system_version
= make_number (11);
6532 Vwindow_system_version
= make_number (10);
6534 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6535 /* In some versions of ncurses,
6536 tputs crashes if we have not called tgetent.
6538 { char b
[2044]; tgetent (b
, "xterm");}
6540 adjust_frame_glyphs_initially ();
6543 #endif /* HAVE_X_WINDOWS */
6546 if (!inhibit_window_system
)
6548 Vwindow_system
= intern ("w32");
6549 Vwindow_system_version
= make_number (1);
6550 adjust_frame_glyphs_initially ();
6553 #endif /* HAVE_NTGUI */
6556 if (!inhibit_window_system
)
6558 Vwindow_system
= intern ("mac");
6559 Vwindow_system_version
= make_number (1);
6560 adjust_frame_glyphs_initially ();
6565 /* If no window system has been specified, try to use the terminal. */
6568 fatal ("standard input is not a tty");
6572 /* Look at the TERM variable. */
6573 terminal_type
= (char *) getenv ("TERM");
6577 fprintf (stderr
, "Please specify your terminal type.\n\
6578 For types defined in VMS, use set term /device=TYPE.\n\
6579 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
6580 \(The quotation marks are necessary since terminal types are lower case.)\n");
6582 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
6588 /* VMS DCL tends to up-case things, so down-case term type.
6589 Hardly any uppercase letters in terminal types; should be none. */
6591 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
6594 strcpy (new, terminal_type
);
6596 for (p
= new; *p
; p
++)
6600 terminal_type
= new;
6604 term_init (0, terminal_type
);
6607 struct frame
*sf
= SELECTED_FRAME ();
6608 int width
= FRAME_TOTAL_COLS (sf
);
6609 int height
= FRAME_LINES (sf
);
6611 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6613 /* If these sizes are so big they cause overflow, just ignore the
6614 change. It's not clear what better we could do. */
6615 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6616 fatal ("screen size %dx%d too big", width
, height
);
6619 adjust_frame_glyphs_initially ();
6620 calculate_costs (XFRAME (selected_frame
));
6625 #endif /* CANNOT_DUMP */
6626 signal (SIGWINCH
, window_change_signal
);
6627 #endif /* SIGWINCH */
6629 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6633 /* The MSDOS terminal turns on its ``window system'' relatively
6634 late into the startup, so we cannot do the frame faces'
6635 initialization just yet. It will be done later by pc-win.el
6636 and internal_terminal_init. */
6637 && (strcmp (terminal_type
, "internal") != 0 || inhibit_window_system
)
6639 && NILP (Vwindow_system
))
6641 /* For the initial frame, we don't have any way of knowing what
6642 are the foreground and background colors of the terminal. */
6643 struct frame
*sf
= SELECTED_FRAME();
6645 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6646 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6647 call0 (intern ("tty-set-up-initial-frame-faces"));
6653 /***********************************************************************
6655 ***********************************************************************/
6657 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6658 Sinternal_show_cursor
, 2, 2, 0,
6659 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6660 WINDOW nil means use the selected window. SHOW non-nil means
6661 show a cursor in WINDOW in the next redisplay. SHOW nil means
6662 don't show a cursor. */)
6664 Lisp_Object window
, show
;
6666 /* Don't change cursor state while redisplaying. This could confuse
6668 if (!redisplaying_p
)
6671 window
= selected_window
;
6673 CHECK_WINDOW (window
);
6675 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6682 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6683 Sinternal_show_cursor_p
, 0, 1, 0,
6684 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6685 WINDOW nil or omitted means report on the selected window. */)
6692 window
= selected_window
;
6694 CHECK_WINDOW (window
);
6696 w
= XWINDOW (window
);
6697 return w
->cursor_off_p
? Qnil
: Qt
;
6701 /***********************************************************************
6703 ***********************************************************************/
6708 defsubr (&Sredraw_frame
);
6709 defsubr (&Sredraw_display
);
6710 defsubr (&Sframe_or_buffer_changed_p
);
6711 defsubr (&Sopen_termscript
);
6713 defsubr (&Ssit_for
);
6714 defsubr (&Ssleep_for
);
6715 defsubr (&Ssend_string_to_terminal
);
6716 defsubr (&Sinternal_show_cursor
);
6717 defsubr (&Sinternal_show_cursor_p
);
6720 defsubr (&Sdump_redisplay_history
);
6723 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6724 staticpro (&frame_and_buffer_state
);
6726 Qdisplay_table
= intern ("display-table");
6727 staticpro (&Qdisplay_table
);
6728 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
6729 staticpro (&Qredisplay_dont_pause
);
6731 DEFVAR_INT ("baud-rate", &baud_rate
,
6732 doc
: /* *The output baud rate of the terminal.
6733 On most systems, changing this value will affect the amount of padding
6734 and the other strategic decisions made during redisplay. */);
6736 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6737 doc
: /* *Non-nil means invert the entire frame display.
6738 This means everything is in inverse video which otherwise would not be. */);
6740 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6741 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6743 See also `ring-bell-function'. */);
6745 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6746 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6747 A non-nil value is useful if the terminal can automatically preserve
6748 Emacs's frame display when you reenter Emacs.
6749 It is up to you to set this variable if your terminal can do that. */);
6751 DEFVAR_LISP ("window-system", &Vwindow_system
,
6752 doc
: /* Name of window system that Emacs is displaying through.
6753 The value is a symbol--for instance, `x' for X windows.
6754 The value is nil if Emacs is using a text-only terminal. */);
6756 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6757 doc
: /* The version number of the window system in use.
6758 For X windows, this is 10 or 11. */);
6760 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6761 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6763 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6764 doc
: /* Table defining how to output a glyph code to the frame.
6765 If not nil, this is a vector indexed by glyph code to define the glyph.
6766 Each element can be:
6767 integer: a glyph code which this glyph is an alias for.
6768 string: output this glyph using that string (not impl. in X windows).
6769 nil: this glyph mod 524288 is the code of a character to output,
6770 and this glyph / 524288 is the face number (see `face-id') to use
6771 while outputting it. */);
6772 Vglyph_table
= Qnil
;
6774 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6775 doc
: /* Display table to use for buffers that specify none.
6776 See `buffer-display-table' for more information. */);
6777 Vstandard_display_table
= Qnil
;
6779 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6780 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6781 redisplay_dont_pause
= 0;
6783 /* Initialize `window-system', unless init_display already decided it. */
6788 Vwindow_system
= Qnil
;
6789 Vwindow_system_version
= Qnil
;
6793 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6794 (do not change this comment) */