1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
33 /* cm.h must come after dispextern.h on Windows. */
34 #include "dispextern.h"
37 #include "character.h"
40 #include "termhooks.h"
45 #include "intervals.h"
46 #include "blockinput.h"
49 /* I don't know why DEC Alpha OSF1 fail to compile this file if we
50 include the following file. */
51 /* #include "systty.h" */
52 #include "syssignal.h"
56 #endif /* HAVE_X_WINDOWS */
60 #endif /* HAVE_NTGUI */
66 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
71 /* To get the prototype for `sleep'. */
77 /* Get number of chars of output now in the buffer of a stdio stream.
78 This ought to be built in in stdio, but it isn't. Some s- files
79 override this because their stdio internals differ. */
81 #ifdef __GNU_LIBRARY__
83 /* The s- file might have overridden the definition with one that
84 works for the system's C library. But we are using the GNU C
85 library, so this is the right definition for every system. */
87 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
88 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
90 #undef PENDING_OUTPUT_COUNT
91 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
93 #else /* not __GNU_LIBRARY__ */
94 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
95 #include <stdio_ext.h>
96 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
98 #ifndef PENDING_OUTPUT_COUNT
99 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
101 #endif /* not __GNU_LIBRARY__ */
103 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
104 #include <term.h> /* for tgetent */
107 /* Structure to pass dimensions around. Used for character bounding
108 boxes, glyph matrix dimensions and alike. */
117 /* Function prototypes. */
119 static struct glyph_matrix
*save_current_matrix
P_ ((struct frame
*));
120 static void restore_current_matrix
P_ ((struct frame
*, struct glyph_matrix
*));
121 static int showing_window_margins_p
P_ ((struct window
*));
122 static void fake_current_matrices
P_ ((Lisp_Object
));
123 static void redraw_overlapping_rows
P_ ((struct window
*, int));
124 static void redraw_overlapped_rows
P_ ((struct window
*, int));
125 static int count_blanks
P_ ((struct glyph
*, int));
126 static int count_match
P_ ((struct glyph
*, struct glyph
*,
127 struct glyph
*, struct glyph
*));
128 static unsigned line_draw_cost
P_ ((struct glyph_matrix
*, int));
129 static void update_frame_line
P_ ((struct frame
*, int));
130 static struct dim allocate_matrices_for_frame_redisplay
131 P_ ((Lisp_Object
, int, int, int, int *));
132 static void allocate_matrices_for_window_redisplay
P_ ((struct window
*));
133 static int realloc_glyph_pool
P_ ((struct glyph_pool
*, struct dim
));
134 static void adjust_frame_glyphs
P_ ((struct frame
*));
135 struct glyph_matrix
*new_glyph_matrix
P_ ((struct glyph_pool
*));
136 static void free_glyph_matrix
P_ ((struct glyph_matrix
*));
137 static void adjust_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
138 int, int, struct dim
));
139 static void change_frame_size_1
P_ ((struct frame
*, int, int, int, int, int));
140 static void swap_glyph_pointers
P_ ((struct glyph_row
*, struct glyph_row
*));
142 static int glyph_row_slice_p
P_ ((struct glyph_row
*, struct glyph_row
*));
144 static void fill_up_frame_row_with_spaces
P_ ((struct glyph_row
*, int));
145 static void build_frame_matrix_from_window_tree
P_ ((struct glyph_matrix
*,
147 static void build_frame_matrix_from_leaf_window
P_ ((struct glyph_matrix
*,
149 static struct glyph_pool
*new_glyph_pool
P_ ((void));
150 static void free_glyph_pool
P_ ((struct glyph_pool
*));
151 static void adjust_frame_glyphs_initially
P_ ((void));
152 static void adjust_frame_message_buffer
P_ ((struct frame
*));
153 static void adjust_decode_mode_spec_buffer
P_ ((struct frame
*));
154 static void fill_up_glyph_row_with_spaces
P_ ((struct glyph_row
*));
155 static void build_frame_matrix
P_ ((struct frame
*));
156 void clear_current_matrices
P_ ((struct frame
*));
157 void scroll_glyph_matrix_range
P_ ((struct glyph_matrix
*, int, int,
159 static void clear_window_matrices
P_ ((struct window
*, int));
160 static void fill_up_glyph_row_area_with_spaces
P_ ((struct glyph_row
*, int));
161 static int scrolling_window
P_ ((struct window
*, int));
162 static int update_window_line
P_ ((struct window
*, int, int *));
163 static void update_marginal_area
P_ ((struct window
*, int, int));
164 static int update_text_area
P_ ((struct window
*, int));
165 static void make_current
P_ ((struct glyph_matrix
*, struct glyph_matrix
*,
167 static void mirror_make_current
P_ ((struct window
*, int));
168 void check_window_matrix_pointers
P_ ((struct window
*));
170 static void check_matrix_pointers
P_ ((struct glyph_matrix
*,
171 struct glyph_matrix
*));
173 static void mirror_line_dance
P_ ((struct window
*, int, int, int *, char *));
174 static int update_window_tree
P_ ((struct window
*, int));
175 static int update_window
P_ ((struct window
*, int));
176 static int update_frame_1
P_ ((struct frame
*, int, int));
177 static void set_window_cursor_after_update
P_ ((struct window
*));
178 static int row_equal_p
P_ ((struct window
*, struct glyph_row
*,
179 struct glyph_row
*, int));
180 static void adjust_frame_glyphs_for_window_redisplay
P_ ((struct frame
*));
181 static void adjust_frame_glyphs_for_frame_redisplay
P_ ((struct frame
*));
182 static void reverse_rows
P_ ((struct glyph_matrix
*, int, int));
183 static int margin_glyphs_to_reserve
P_ ((struct window
*, int, Lisp_Object
));
184 static void sync_window_with_frame_matrix_rows
P_ ((struct window
*));
185 struct window
*frame_row_to_window
P_ ((struct window
*, int));
188 /* Non-zero means don't pause redisplay for pending input. (This is
189 for debugging and for a future implementation of EDT-like
192 int redisplay_dont_pause
;
194 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
195 are supported, so we can check for input during redisplay at
196 regular intervals. */
197 #ifdef EMACS_HAS_USECS
198 #define PERIODIC_PREEMPTION_CHECKING 1
200 #define PERIODIC_PREEMPTION_CHECKING 0
203 #if PERIODIC_PREEMPTION_CHECKING
205 /* If a number (float), check for user input every N seconds. */
207 Lisp_Object Vredisplay_preemption_period
;
209 /* Redisplay preemption timers. */
211 static EMACS_TIME preemption_period
;
212 static EMACS_TIME preemption_next_check
;
216 /* Nonzero upon entry to redisplay means do not assume anything about
217 current contents of actual terminal frame; clear and redraw it. */
221 /* Nonzero means last display completed. Zero means it was preempted. */
223 int display_completed
;
225 /* Lisp variable visible-bell; enables use of screen-flash instead of
230 /* Invert the color of the whole frame, at a low level. */
234 /* Line speed of the terminal. */
238 /* Either nil or a symbol naming the window system under which Emacs
239 creates the first frame. */
241 Lisp_Object Vinitial_window_system
;
243 /* Version number of X windows: 10, 11 or nil. */
245 Lisp_Object Vwindow_system_version
;
247 /* Vector of glyph definitions. Indexed by glyph number, the contents
248 are a string which is how to output the glyph.
250 If Vglyph_table is nil, a glyph is output by using its low 8 bits
253 This is an obsolete feature that is no longer used. The variable
254 is retained for compatibility. */
256 Lisp_Object Vglyph_table
;
258 /* Display table to use for vectors that don't specify their own. */
260 Lisp_Object Vstandard_display_table
;
262 /* Nonzero means reading single-character input with prompt so put
263 cursor on mini-buffer after the prompt. Positive means at end of
264 text in echo area; negative means at beginning of line. */
266 int cursor_in_echo_area
;
268 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
271 /* The currently selected frame. In a single-frame version, this
272 variable always equals the_only_frame. */
274 Lisp_Object selected_frame
;
276 /* A frame which is not just a mini-buffer, or 0 if there are no such
277 frames. This is usually the most recent such frame that was
278 selected. In a single-frame version, this variable always holds
279 the address of the_only_frame. */
281 struct frame
*last_nonminibuf_frame
;
283 /* 1 means SIGWINCH happened when not safe. */
285 int delayed_size_change
;
287 /* 1 means glyph initialization has been completed at startup. */
289 static int glyphs_initialized_initially_p
;
291 /* Updated window if != 0. Set by update_window. */
293 struct window
*updated_window
;
295 /* Glyph row updated in update_window_line, and area that is updated. */
297 struct glyph_row
*updated_row
;
300 /* A glyph for a space. */
302 struct glyph space_glyph
;
304 /* Non-zero means update has been performed directly, so that there's
305 no need for redisplay_internal to do much work. Set by
306 direct_output_for_insert. */
308 int redisplay_performed_directly_p
;
310 /* Counts of allocated structures. These counts serve to diagnose
311 memory leaks and double frees. */
313 int glyph_matrix_count
;
314 int glyph_pool_count
;
316 /* If non-null, the frame whose frame matrices are manipulated. If
317 null, window matrices are worked on. */
319 static struct frame
*frame_matrix_frame
;
321 /* Non-zero means that fonts have been loaded since the last glyph
322 matrix adjustments. Redisplay must stop, and glyph matrices must
323 be adjusted when this flag becomes non-zero during display. The
324 reason fonts can be loaded so late is that fonts of fontsets are
325 loaded on demand. Another reason is that a line contains many
326 characters displayed by zero width or very narrow glyphs of
327 variable-width fonts. */
331 /* Convert vpos and hpos from frame to window and vice versa.
332 This may only be used for terminal frames. */
336 static int window_to_frame_vpos
P_ ((struct window
*, int));
337 static int window_to_frame_hpos
P_ ((struct window
*, int));
338 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
339 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
341 /* One element of the ring buffer containing redisplay history
344 struct redisplay_history
346 char trace
[512 + 100];
349 /* The size of the history buffer. */
351 #define REDISPLAY_HISTORY_SIZE 30
353 /* The redisplay history buffer. */
355 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
357 /* Next free entry in redisplay_history. */
359 static int history_idx
;
361 /* A tick that's incremented each time something is added to the
364 static unsigned history_tick
;
366 static void add_frame_display_history
P_ ((struct frame
*, int));
367 static void add_window_display_history
P_ ((struct window
*, char *, int));
369 /* Add to the redisplay history how window W has been displayed.
370 MSG is a trace containing the information how W's glyph matrix
371 has been constructed. PAUSED_P non-zero means that the update
372 has been interrupted for pending input. */
375 add_window_display_history (w
, msg
, paused_p
)
382 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
384 buf
= redisplay_history
[history_idx
].trace
;
387 sprintf (buf
, "%d: window %p (`%s')%s\n",
390 ((BUFFERP (w
->buffer
)
391 && STRINGP (XBUFFER (w
->buffer
)->name
))
392 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
394 paused_p
? " ***paused***" : "");
399 /* Add to the redisplay history that frame F has been displayed.
400 PAUSED_P non-zero means that the update has been interrupted for
404 add_frame_display_history (f
, paused_p
)
410 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
412 buf
= redisplay_history
[history_idx
].trace
;
415 sprintf (buf
, "%d: update frame %p%s",
417 f
, paused_p
? " ***paused***" : "");
421 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
422 Sdump_redisplay_history
, 0, 0, "",
423 doc
: /* Dump redisplay history to stderr. */)
428 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
431 i
= REDISPLAY_HISTORY_SIZE
- 1;
432 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
439 #else /* GLYPH_DEBUG == 0 */
441 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
442 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
444 #endif /* GLYPH_DEBUG == 0 */
447 /* Like bcopy except never gets confused by overlap. Let this be the
448 first function defined in this file, or change emacs.c where the
449 address of this function is used. */
452 safe_bcopy (from
, to
, size
)
457 if (size
<= 0 || from
== to
)
460 /* If the source and destination don't overlap, then bcopy can
461 handle it. If they do overlap, but the destination is lower in
462 memory than the source, we'll assume bcopy can handle that. */
463 if (to
< from
|| from
+ size
<= to
)
464 bcopy (from
, to
, size
);
466 /* Otherwise, we'll copy from the end. */
469 register const char *endf
= from
+ size
;
470 register char *endt
= to
+ size
;
472 /* If TO - FROM is large, then we should break the copy into
473 nonoverlapping chunks of TO - FROM bytes each. However, if
474 TO - FROM is small, then the bcopy function call overhead
475 makes this not worth it. The crossover point could be about
476 anywhere. Since I don't think the obvious copy loop is too
477 bad, I'm trying to err in its favor. */
482 while (endf
!= from
);
494 bcopy (endf
, endt
, to
- from
);
497 /* If SIZE wasn't a multiple of TO - FROM, there will be a
498 little left over. The amount left over is (endt + (to -
499 from)) - to, which is endt - from. */
500 bcopy (from
, to
, endt
- from
);
507 /***********************************************************************
509 ***********************************************************************/
511 /* Allocate and return a glyph_matrix structure. POOL is the glyph
512 pool from which memory for the matrix should be allocated, or null
513 for window-based redisplay where no glyph pools are used. The
514 member `pool' of the glyph matrix structure returned is set to
515 POOL, the structure is otherwise zeroed. */
517 struct glyph_matrix
*
518 new_glyph_matrix (pool
)
519 struct glyph_pool
*pool
;
521 struct glyph_matrix
*result
;
523 /* Allocate and clear. */
524 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
525 bzero (result
, sizeof *result
);
527 /* Increment number of allocated matrices. This count is used
528 to detect memory leaks. */
529 ++glyph_matrix_count
;
531 /* Set pool and return. */
537 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
539 The global counter glyph_matrix_count is decremented when a matrix
540 is freed. If the count gets negative, more structures were freed
541 than allocated, i.e. one matrix was freed more than once or a bogus
542 pointer was passed to this function.
544 If MATRIX->pool is null, this means that the matrix manages its own
545 glyph memory---this is done for matrices on X frames. Freeing the
546 matrix also frees the glyph memory in this case. */
549 free_glyph_matrix (matrix
)
550 struct glyph_matrix
*matrix
;
556 /* Detect the case that more matrices are freed than were
558 if (--glyph_matrix_count
< 0)
561 /* Free glyph memory if MATRIX owns it. */
562 if (matrix
->pool
== NULL
)
563 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
564 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
566 /* Free row structures and the matrix itself. */
567 xfree (matrix
->rows
);
573 /* Return the number of glyphs to reserve for a marginal area of
574 window W. TOTAL_GLYPHS is the number of glyphs in a complete
575 display line of window W. MARGIN gives the width of the marginal
576 area in canonical character units. MARGIN should be an integer
580 margin_glyphs_to_reserve (w
, total_glyphs
, margin
)
587 if (NUMBERP (margin
))
589 int width
= XFASTINT (w
->total_cols
);
590 double d
= max (0, XFLOATINT (margin
));
591 d
= min (width
/ 2 - 1, d
);
592 n
= (int) ((double) total_glyphs
/ width
* d
);
601 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
604 W is null if the function is called for a frame glyph matrix.
605 Otherwise it is the window MATRIX is a member of. X and Y are the
606 indices of the first column and row of MATRIX within the frame
607 matrix, if such a matrix exists. They are zero for purely
608 window-based redisplay. DIM is the needed size of the matrix.
610 In window-based redisplay, where no frame matrices exist, glyph
611 matrices manage their own glyph storage. Otherwise, they allocate
612 storage from a common frame glyph pool which can be found in
615 The reason for this memory management strategy is to avoid complete
616 frame redraws if possible. When we allocate from a common pool, a
617 change of the location or size of a sub-matrix within the pool
618 requires a complete redisplay of the frame because we cannot easily
619 make sure that the current matrices of all windows still agree with
620 what is displayed on the screen. While this is usually fast, it
621 leads to screen flickering. */
624 adjust_glyph_matrix (w
, matrix
, x
, y
, dim
)
626 struct glyph_matrix
*matrix
;
632 int marginal_areas_changed_p
= 0;
633 int header_line_changed_p
= 0;
634 int header_line_p
= 0;
635 int left
= -1, right
= -1;
636 int window_width
= -1, window_height
= -1;
638 /* See if W had a header line that has disappeared now, or vice versa.
642 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
644 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
645 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
647 matrix
->header_line_p
= header_line_p
;
649 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
650 Do nothing if MATRIX' size, position, vscroll, and marginal areas
651 haven't changed. This optimization is important because preserving
652 the matrix means preventing redisplay. */
653 if (matrix
->pool
== NULL
)
655 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
656 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
657 xassert (left
>= 0 && right
>= 0);
658 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
659 || right
!= matrix
->right_margin_glyphs
);
661 if (!marginal_areas_changed_p
663 && !header_line_changed_p
664 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
665 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
666 && matrix
->window_height
== window_height
667 && matrix
->window_vscroll
== w
->vscroll
668 && matrix
->window_width
== window_width
)
672 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
673 if (matrix
->rows_allocated
< dim
.height
)
675 int size
= dim
.height
* sizeof (struct glyph_row
);
676 new_rows
= dim
.height
- matrix
->rows_allocated
;
677 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
678 bzero (matrix
->rows
+ matrix
->rows_allocated
,
679 new_rows
* sizeof *matrix
->rows
);
680 matrix
->rows_allocated
= dim
.height
;
685 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
686 on a frame not using window-based redisplay. Set up pointers for
687 each row into the glyph pool. */
690 xassert (matrix
->pool
->glyphs
);
694 left
= margin_glyphs_to_reserve (w
, dim
.width
,
695 w
->left_margin_cols
);
696 right
= margin_glyphs_to_reserve (w
, dim
.width
,
697 w
->right_margin_cols
);
702 for (i
= 0; i
< dim
.height
; ++i
)
704 struct glyph_row
*row
= &matrix
->rows
[i
];
706 row
->glyphs
[LEFT_MARGIN_AREA
]
707 = (matrix
->pool
->glyphs
708 + (y
+ i
) * matrix
->pool
->ncolumns
712 || row
== matrix
->rows
+ dim
.height
- 1
713 || (row
== matrix
->rows
&& matrix
->header_line_p
))
715 row
->glyphs
[TEXT_AREA
]
716 = row
->glyphs
[LEFT_MARGIN_AREA
];
717 row
->glyphs
[RIGHT_MARGIN_AREA
]
718 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
719 row
->glyphs
[LAST_AREA
]
720 = row
->glyphs
[RIGHT_MARGIN_AREA
];
724 row
->glyphs
[TEXT_AREA
]
725 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
726 row
->glyphs
[RIGHT_MARGIN_AREA
]
727 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
728 row
->glyphs
[LAST_AREA
]
729 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
733 matrix
->left_margin_glyphs
= left
;
734 matrix
->right_margin_glyphs
= right
;
738 /* If MATRIX->pool is null, MATRIX is responsible for managing
739 its own memory. It is a window matrix for window-based redisplay.
740 Allocate glyph memory from the heap. */
741 if (dim
.width
> matrix
->matrix_w
743 || header_line_changed_p
744 || marginal_areas_changed_p
)
746 struct glyph_row
*row
= matrix
->rows
;
747 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
751 row
->glyphs
[LEFT_MARGIN_AREA
]
752 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
754 * sizeof (struct glyph
)));
756 /* The mode line never has marginal areas. */
757 if (row
== matrix
->rows
+ dim
.height
- 1
758 || (row
== matrix
->rows
&& matrix
->header_line_p
))
760 row
->glyphs
[TEXT_AREA
]
761 = row
->glyphs
[LEFT_MARGIN_AREA
];
762 row
->glyphs
[RIGHT_MARGIN_AREA
]
763 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
764 row
->glyphs
[LAST_AREA
]
765 = row
->glyphs
[RIGHT_MARGIN_AREA
];
769 row
->glyphs
[TEXT_AREA
]
770 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
771 row
->glyphs
[RIGHT_MARGIN_AREA
]
772 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
773 row
->glyphs
[LAST_AREA
]
774 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
780 xassert (left
>= 0 && right
>= 0);
781 matrix
->left_margin_glyphs
= left
;
782 matrix
->right_margin_glyphs
= right
;
785 /* Number of rows to be used by MATRIX. */
786 matrix
->nrows
= dim
.height
;
787 xassert (matrix
->nrows
>= 0);
791 if (matrix
== w
->current_matrix
)
793 /* Mark rows in a current matrix of a window as not having
794 valid contents. It's important to not do this for
795 desired matrices. When Emacs starts, it may already be
796 building desired matrices when this function runs. */
797 if (window_width
< 0)
798 window_width
= window_box_width (w
, -1);
800 /* Optimize the case that only the height has changed (C-x 2,
801 upper window). Invalidate all rows that are no longer part
803 if (!marginal_areas_changed_p
804 && !header_line_changed_p
806 && dim
.width
== matrix
->matrix_w
807 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
808 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
809 && matrix
->window_width
== window_width
)
811 /* Find the last row in the window. */
812 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
813 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
819 /* Window end is invalid, if inside of the rows that
820 are invalidated below. */
821 if (INTEGERP (w
->window_end_vpos
)
822 && XFASTINT (w
->window_end_vpos
) >= i
)
823 w
->window_end_valid
= Qnil
;
825 while (i
< matrix
->nrows
)
826 matrix
->rows
[i
++].enabled_p
= 0;
830 for (i
= 0; i
< matrix
->nrows
; ++i
)
831 matrix
->rows
[i
].enabled_p
= 0;
834 else if (matrix
== w
->desired_matrix
)
836 /* Rows in desired matrices always have to be cleared;
837 redisplay expects this is the case when it runs, so it
838 had better be the case when we adjust matrices between
840 for (i
= 0; i
< matrix
->nrows
; ++i
)
841 matrix
->rows
[i
].enabled_p
= 0;
846 /* Remember last values to be able to optimize frame redraws. */
847 matrix
->matrix_x
= x
;
848 matrix
->matrix_y
= y
;
849 matrix
->matrix_w
= dim
.width
;
850 matrix
->matrix_h
= dim
.height
;
852 /* Record the top y location and height of W at the time the matrix
853 was last adjusted. This is used to optimize redisplay above. */
856 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
857 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
858 matrix
->window_height
= window_height
;
859 matrix
->window_width
= window_width
;
860 matrix
->window_vscroll
= w
->vscroll
;
865 /* Reverse the contents of rows in MATRIX between START and END. The
866 contents of the row at END - 1 end up at START, END - 2 at START +
867 1 etc. This is part of the implementation of rotate_matrix (see
871 reverse_rows (matrix
, start
, end
)
872 struct glyph_matrix
*matrix
;
877 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
879 /* Non-ISO HP/UX compiler doesn't like auto struct
881 struct glyph_row temp
;
882 temp
= matrix
->rows
[i
];
883 matrix
->rows
[i
] = matrix
->rows
[j
];
884 matrix
->rows
[j
] = temp
;
889 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
890 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
891 indices. (Note: this does not copy glyphs, only glyph pointers in
892 row structures are moved around).
894 The algorithm used for rotating the vector was, I believe, first
895 described by Kernighan. See the vector R as consisting of two
896 sub-vectors AB, where A has length BY for BY >= 0. The result
897 after rotating is then BA. Reverse both sub-vectors to get ArBr
898 and reverse the result to get (ArBr)r which is BA. Similar for
902 rotate_matrix (matrix
, first
, last
, by
)
903 struct glyph_matrix
*matrix
;
908 /* Up (rotate left, i.e. towards lower indices). */
910 reverse_rows (matrix
, first
, first
+ by
);
911 reverse_rows (matrix
, first
+ by
, last
);
912 reverse_rows (matrix
, first
, last
);
916 /* Down (rotate right, i.e. towards higher indices). */
917 reverse_rows (matrix
, last
- by
, last
);
918 reverse_rows (matrix
, first
, last
- by
);
919 reverse_rows (matrix
, first
, last
);
924 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
925 with indices START <= index < END. Increment positions by DELTA/
929 increment_matrix_positions (matrix
, start
, end
, delta
, delta_bytes
)
930 struct glyph_matrix
*matrix
;
931 int start
, end
, delta
, delta_bytes
;
933 /* Check that START and END are reasonable values. */
934 xassert (start
>= 0 && start
<= matrix
->nrows
);
935 xassert (end
>= 0 && end
<= matrix
->nrows
);
936 xassert (start
<= end
);
938 for (; start
< end
; ++start
)
939 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
943 /* Enable a range of rows in glyph matrix MATRIX. START and END are
944 the row indices of the first and last + 1 row to enable. If
945 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
948 enable_glyph_matrix_rows (matrix
, start
, end
, enabled_p
)
949 struct glyph_matrix
*matrix
;
953 xassert (start
<= end
);
954 xassert (start
>= 0 && start
< matrix
->nrows
);
955 xassert (end
>= 0 && end
<= matrix
->nrows
);
957 for (; start
< end
; ++start
)
958 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
964 This empties all rows in MATRIX by setting the enabled_p flag for
965 all rows of the matrix to zero. The function prepare_desired_row
966 will eventually really clear a row when it sees one with a zero
969 Resets update hints to defaults value. The only update hint
970 currently present is the flag MATRIX->no_scrolling_p. */
973 clear_glyph_matrix (matrix
)
974 struct glyph_matrix
*matrix
;
978 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
979 matrix
->no_scrolling_p
= 0;
984 /* Shift part of the glyph matrix MATRIX of window W up or down.
985 Increment y-positions in glyph rows between START and END by DY,
986 and recompute their visible height. */
989 shift_glyph_matrix (w
, matrix
, start
, end
, dy
)
991 struct glyph_matrix
*matrix
;
996 xassert (start
<= end
);
997 xassert (start
>= 0 && start
< matrix
->nrows
);
998 xassert (end
>= 0 && end
<= matrix
->nrows
);
1000 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1001 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1003 for (; start
< end
; ++start
)
1005 struct glyph_row
*row
= &matrix
->rows
[start
];
1008 row
->visible_height
= row
->height
;
1011 row
->visible_height
-= min_y
- row
->y
;
1012 if (row
->y
+ row
->height
> max_y
)
1013 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1018 /* Mark all rows in current matrices of frame F as invalid. Marking
1019 invalid is done by setting enabled_p to zero for all rows in a
1023 clear_current_matrices (f
)
1024 register struct frame
*f
;
1026 /* Clear frame current matrix, if we have one. */
1027 if (f
->current_matrix
)
1028 clear_glyph_matrix (f
->current_matrix
);
1030 /* Clear the matrix of the menu bar window, if such a window exists.
1031 The menu bar window is currently used to display menus on X when
1032 no toolkit support is compiled in. */
1033 if (WINDOWP (f
->menu_bar_window
))
1034 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
1036 /* Clear the matrix of the tool-bar window, if any. */
1037 if (WINDOWP (f
->tool_bar_window
))
1038 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
1040 /* Clear current window matrices. */
1041 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1042 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
1046 /* Clear out all display lines of F for a coming redisplay. */
1049 clear_desired_matrices (f
)
1050 register struct frame
*f
;
1052 if (f
->desired_matrix
)
1053 clear_glyph_matrix (f
->desired_matrix
);
1055 if (WINDOWP (f
->menu_bar_window
))
1056 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
1058 if (WINDOWP (f
->tool_bar_window
))
1059 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
1061 /* Do it for window matrices. */
1062 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
1063 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
1067 /* Clear matrices in window tree rooted in W. If DESIRED_P is
1068 non-zero clear desired matrices, otherwise clear current matrices. */
1071 clear_window_matrices (w
, desired_p
)
1077 if (!NILP (w
->hchild
))
1079 xassert (WINDOWP (w
->hchild
));
1080 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
1082 else if (!NILP (w
->vchild
))
1084 xassert (WINDOWP (w
->vchild
));
1085 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1090 clear_glyph_matrix (w
->desired_matrix
);
1093 clear_glyph_matrix (w
->current_matrix
);
1094 w
->window_end_valid
= Qnil
;
1098 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1104 /***********************************************************************
1107 See dispextern.h for an overall explanation of glyph rows.
1108 ***********************************************************************/
1110 /* Clear glyph row ROW. Do it in a way that makes it robust against
1111 changes in the glyph_row structure, i.e. addition or removal of
1112 structure members. */
1114 static struct glyph_row null_row
;
1117 clear_glyph_row (row
)
1118 struct glyph_row
*row
;
1120 struct glyph
*p
[1 + LAST_AREA
];
1122 /* Save pointers. */
1123 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1124 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1125 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1126 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1131 /* Restore pointers. */
1132 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1133 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1134 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1135 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1137 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1138 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1139 Redisplay outputs such glyphs, and flickering effects were
1140 the result. This also depended on the contents of memory
1141 returned by xmalloc. If flickering happens again, activate
1142 the code below. If the flickering is gone with that, chances
1143 are that the flickering has the same reason as here. */
1144 bzero (p
[0], (char *) p
[LAST_AREA
] - (char *) p
[0]);
1149 /* Make ROW an empty, enabled row of canonical character height,
1150 in window W starting at y-position Y. */
1153 blank_row (w
, row
, y
)
1155 struct glyph_row
*row
;
1160 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1161 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1163 clear_glyph_row (row
);
1165 row
->ascent
= row
->phys_ascent
= 0;
1166 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1167 row
->visible_height
= row
->height
;
1170 row
->visible_height
-= min_y
- row
->y
;
1171 if (row
->y
+ row
->height
> max_y
)
1172 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1178 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1179 are the amounts by which to change positions. Note that the first
1180 glyph of the text area of a row can have a buffer position even if
1181 the used count of the text area is zero. Such rows display line
1185 increment_row_positions (row
, delta
, delta_bytes
)
1186 struct glyph_row
*row
;
1187 int delta
, delta_bytes
;
1191 /* Increment start and end positions. */
1192 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1193 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1194 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1195 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1197 if (!row
->enabled_p
)
1200 /* Increment positions in glyphs. */
1201 for (area
= 0; area
< LAST_AREA
; ++area
)
1202 for (i
= 0; i
< row
->used
[area
]; ++i
)
1203 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1204 && row
->glyphs
[area
][i
].charpos
> 0)
1205 row
->glyphs
[area
][i
].charpos
+= delta
;
1207 /* Capture the case of rows displaying a line end. */
1208 if (row
->used
[TEXT_AREA
] == 0
1209 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1210 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1215 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1216 contents, i.e. glyph structure contents are exchanged between A and
1217 B without changing glyph pointers in A and B. */
1220 swap_glyphs_in_rows (a
, b
)
1221 struct glyph_row
*a
, *b
;
1225 for (area
= 0; area
< LAST_AREA
; ++area
)
1227 /* Number of glyphs to swap. */
1228 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1230 /* Start of glyphs in area of row A. */
1231 struct glyph
*glyph_a
= a
->glyphs
[area
];
1233 /* End + 1 of glyphs in area of row A. */
1234 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1236 /* Start of glyphs in area of row B. */
1237 struct glyph
*glyph_b
= b
->glyphs
[area
];
1239 while (glyph_a
< glyph_a_end
)
1241 /* Non-ISO HP/UX compiler doesn't like auto struct
1245 *glyph_a
= *glyph_b
;
1255 /* Exchange pointers to glyph memory between glyph rows A and B. */
1258 swap_glyph_pointers (a
, b
)
1259 struct glyph_row
*a
, *b
;
1262 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1264 struct glyph
*temp
= a
->glyphs
[i
];
1265 a
->glyphs
[i
] = b
->glyphs
[i
];
1266 b
->glyphs
[i
] = temp
;
1271 /* Copy glyph row structure FROM to glyph row structure TO, except
1272 that glyph pointers in the structures are left unchanged. */
1275 copy_row_except_pointers (to
, from
)
1276 struct glyph_row
*to
, *from
;
1278 struct glyph
*pointers
[1 + LAST_AREA
];
1280 /* Save glyph pointers of TO. */
1281 bcopy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1283 /* Do a structure assignment. */
1286 /* Restore original pointers of TO. */
1287 bcopy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1291 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1292 TO and FROM are left unchanged. Glyph contents are copied from the
1293 glyph memory of FROM to the glyph memory of TO. Increment buffer
1294 positions in row TO by DELTA/ DELTA_BYTES. */
1297 copy_glyph_row_contents (to
, from
, delta
, delta_bytes
)
1298 struct glyph_row
*to
, *from
;
1299 int delta
, delta_bytes
;
1303 /* This is like a structure assignment TO = FROM, except that
1304 glyph pointers in the rows are left unchanged. */
1305 copy_row_except_pointers (to
, from
);
1307 /* Copy glyphs from FROM to TO. */
1308 for (area
= 0; area
< LAST_AREA
; ++area
)
1309 if (from
->used
[area
])
1310 bcopy (from
->glyphs
[area
], to
->glyphs
[area
],
1311 from
->used
[area
] * sizeof (struct glyph
));
1313 /* Increment buffer positions in TO by DELTA. */
1314 increment_row_positions (to
, delta
, delta_bytes
);
1318 /* Assign glyph row FROM to glyph row TO. This works like a structure
1319 assignment TO = FROM, except that glyph pointers are not copied but
1320 exchanged between TO and FROM. Pointers must be exchanged to avoid
1324 assign_row (to
, from
)
1325 struct glyph_row
*to
, *from
;
1327 swap_glyph_pointers (to
, from
);
1328 copy_row_except_pointers (to
, from
);
1332 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1333 a row in a window matrix, is a slice of the glyph memory of the
1334 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1335 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1336 memory of FRAME_ROW. */
1341 glyph_row_slice_p (window_row
, frame_row
)
1342 struct glyph_row
*window_row
, *frame_row
;
1344 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1345 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1346 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1348 return (frame_glyph_start
<= window_glyph_start
1349 && window_glyph_start
< frame_glyph_end
);
1352 #endif /* GLYPH_DEBUG */
1356 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1357 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1358 in WINDOW_MATRIX is found satisfying the condition. */
1360 static struct glyph_row
*
1361 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1362 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1367 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1369 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1370 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1371 frame_matrix
->rows
+ row
))
1374 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1379 /* Prepare ROW for display. Desired rows are cleared lazily,
1380 i.e. they are only marked as to be cleared by setting their
1381 enabled_p flag to zero. When a row is to be displayed, a prior
1382 call to this function really clears it. */
1385 prepare_desired_row (row
)
1386 struct glyph_row
*row
;
1388 if (!row
->enabled_p
)
1390 clear_glyph_row (row
);
1396 /* Return a hash code for glyph row ROW. */
1399 line_hash_code (row
)
1400 struct glyph_row
*row
;
1406 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1407 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1411 int c
= glyph
->u
.ch
;
1412 int face_id
= glyph
->face_id
;
1413 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1415 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1416 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1428 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1429 the number of characters in the line. If must_write_spaces is
1430 zero, leading and trailing spaces are ignored. */
1433 line_draw_cost (matrix
, vpos
)
1434 struct glyph_matrix
*matrix
;
1437 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1438 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1439 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1441 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1442 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1444 /* Ignore trailing and leading spaces if we can. */
1445 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1447 /* Skip from the end over trailing spaces. */
1448 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1451 /* All blank line. */
1455 /* Skip over leading spaces. */
1456 while (CHAR_GLYPH_SPACE_P (*beg
))
1460 /* If we don't have a glyph-table, each glyph is one character,
1461 so return the number of glyphs. */
1462 if (glyph_table_base
== 0)
1466 /* Otherwise, scan the glyphs and accumulate their total length
1473 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1475 if (GLYPH_INVALID_P (g
)
1476 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1479 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1489 /* Test two glyph rows A and B for equality. Value is non-zero if A
1490 and B have equal contents. W is the window to which the glyphs
1491 rows A and B belong. It is needed here to test for partial row
1492 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1493 flags of A and B, too. */
1496 row_equal_p (w
, a
, b
, mouse_face_p
)
1498 struct glyph_row
*a
, *b
;
1503 else if (a
->hash
!= b
->hash
)
1507 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1510 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1513 /* Compare glyphs. */
1514 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1516 if (a
->used
[area
] != b
->used
[area
])
1519 a_glyph
= a
->glyphs
[area
];
1520 a_end
= a_glyph
+ a
->used
[area
];
1521 b_glyph
= b
->glyphs
[area
];
1523 while (a_glyph
< a_end
1524 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1525 ++a_glyph
, ++b_glyph
;
1527 if (a_glyph
!= a_end
)
1531 if (a
->fill_line_p
!= b
->fill_line_p
1532 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1533 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1534 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1535 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1536 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1537 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1538 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1539 || a
->overlapped_p
!= b
->overlapped_p
1540 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1541 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1542 /* Different partially visible characters on left margin. */
1544 /* Different height. */
1545 || a
->ascent
!= b
->ascent
1546 || a
->phys_ascent
!= b
->phys_ascent
1547 || a
->phys_height
!= b
->phys_height
1548 || a
->visible_height
!= b
->visible_height
)
1557 /***********************************************************************
1560 See dispextern.h for an overall explanation of glyph pools.
1561 ***********************************************************************/
1563 /* Allocate a glyph_pool structure. The structure returned is
1564 initialized with zeros. The global variable glyph_pool_count is
1565 incremented for each pool allocated. */
1567 static struct glyph_pool
*
1570 struct glyph_pool
*result
;
1572 /* Allocate a new glyph_pool and clear it. */
1573 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1574 bzero (result
, sizeof *result
);
1576 /* For memory leak and double deletion checking. */
1583 /* Free a glyph_pool structure POOL. The function may be called with
1584 a null POOL pointer. The global variable glyph_pool_count is
1585 decremented with every pool structure freed. If this count gets
1586 negative, more structures were freed than allocated, i.e. one
1587 structure must have been freed more than once or a bogus pointer
1588 was passed to free_glyph_pool. */
1591 free_glyph_pool (pool
)
1592 struct glyph_pool
*pool
;
1596 /* More freed than allocated? */
1598 xassert (glyph_pool_count
>= 0);
1600 xfree (pool
->glyphs
);
1606 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1607 columns we need. This function never shrinks a pool. The only
1608 case in which this would make sense, would be when a frame's size
1609 is changed from a large value to a smaller one. But, if someone
1610 does it once, we can expect that he will do it again.
1612 Value is non-zero if the pool changed in a way which makes
1613 re-adjusting window glyph matrices necessary. */
1616 realloc_glyph_pool (pool
, matrix_dim
)
1617 struct glyph_pool
*pool
;
1618 struct dim matrix_dim
;
1623 changed_p
= (pool
->glyphs
== 0
1624 || matrix_dim
.height
!= pool
->nrows
1625 || matrix_dim
.width
!= pool
->ncolumns
);
1627 /* Enlarge the glyph pool. */
1628 needed
= matrix_dim
.width
* matrix_dim
.height
;
1629 if (needed
> pool
->nglyphs
)
1631 int size
= needed
* sizeof (struct glyph
);
1634 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1637 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1638 bzero (pool
->glyphs
, size
);
1641 pool
->nglyphs
= needed
;
1644 /* Remember the number of rows and columns because (a) we use them
1645 to do sanity checks, and (b) the number of columns determines
1646 where rows in the frame matrix start---this must be available to
1647 determine pointers to rows of window sub-matrices. */
1648 pool
->nrows
= matrix_dim
.height
;
1649 pool
->ncolumns
= matrix_dim
.width
;
1656 /***********************************************************************
1658 ***********************************************************************/
1663 /* Flush standard output. This is sometimes useful to call from the debugger.
1664 XXX Maybe this should be changed to flush the current terminal instead of
1675 /* Check that no glyph pointers have been lost in MATRIX. If a
1676 pointer has been lost, e.g. by using a structure assignment between
1677 rows, at least one pointer must occur more than once in the rows of
1681 check_matrix_pointer_lossage (matrix
)
1682 struct glyph_matrix
*matrix
;
1686 for (i
= 0; i
< matrix
->nrows
; ++i
)
1687 for (j
= 0; j
< matrix
->nrows
; ++j
)
1689 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1690 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1694 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1697 matrix_row (matrix
, row
)
1698 struct glyph_matrix
*matrix
;
1701 xassert (matrix
&& matrix
->rows
);
1702 xassert (row
>= 0 && row
< matrix
->nrows
);
1704 /* That's really too slow for normal testing because this function
1705 is called almost everywhere. Although---it's still astonishingly
1706 fast, so it is valuable to have for debugging purposes. */
1708 check_matrix_pointer_lossage (matrix
);
1711 return matrix
->rows
+ row
;
1715 #if 0 /* This function makes invalid assumptions when text is
1716 partially invisible. But it might come handy for debugging
1719 /* Check invariants that must hold for an up to date current matrix of
1723 check_matrix_invariants (w
)
1726 struct glyph_matrix
*matrix
= w
->current_matrix
;
1727 int yb
= window_text_bottom_y (w
);
1728 struct glyph_row
*row
= matrix
->rows
;
1729 struct glyph_row
*last_text_row
= NULL
;
1730 struct buffer
*saved
= current_buffer
;
1731 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1734 /* This can sometimes happen for a fresh window. */
1735 if (matrix
->nrows
< 2)
1738 set_buffer_temp (buffer
);
1740 /* Note: last row is always reserved for the mode line. */
1741 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1742 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1744 struct glyph_row
*next
= row
+ 1;
1746 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1747 last_text_row
= row
;
1749 /* Check that character and byte positions are in sync. */
1750 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1751 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1753 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1754 have such a position temporarily in case of a minibuffer
1755 displaying something like `[Sole completion]' at its end. */
1756 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1757 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1758 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1760 /* Check that end position of `row' is equal to start position
1762 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1764 xassert (MATRIX_ROW_END_CHARPOS (row
)
1765 == MATRIX_ROW_START_CHARPOS (next
));
1766 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1767 == MATRIX_ROW_START_BYTEPOS (next
));
1772 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1773 xassert (w
->desired_matrix
->rows
!= NULL
);
1774 set_buffer_temp (saved
);
1779 #endif /* GLYPH_DEBUG != 0 */
1783 /**********************************************************************
1784 Allocating/ Adjusting Glyph Matrices
1785 **********************************************************************/
1787 /* Allocate glyph matrices over a window tree for a frame-based
1790 X and Y are column/row within the frame glyph matrix where
1791 sub-matrices for the window tree rooted at WINDOW must be
1792 allocated. DIM_ONLY_P non-zero means that the caller of this
1793 function is only interested in the result matrix dimension, and
1794 matrix adjustments should not be performed.
1796 The function returns the total width/height of the sub-matrices of
1797 the window tree. If called on a frame root window, the computation
1798 will take the mini-buffer window into account.
1800 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1802 NEW_LEAF_MATRIX set if any window in the tree did not have a
1803 glyph matrices yet, and
1805 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1806 any window in the tree will be changed or have been changed (see
1809 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1812 Windows are arranged into chains of windows on the same level
1813 through the next fields of window structures. Such a level can be
1814 either a sequence of horizontally adjacent windows from left to
1815 right, or a sequence of vertically adjacent windows from top to
1816 bottom. Each window in a horizontal sequence can be either a leaf
1817 window or a vertical sequence; a window in a vertical sequence can
1818 be either a leaf or a horizontal sequence. All windows in a
1819 horizontal sequence have the same height, and all windows in a
1820 vertical sequence have the same width.
1822 This function uses, for historical reasons, a more general
1823 algorithm to determine glyph matrix dimensions that would be
1826 The matrix height of a horizontal sequence is determined by the
1827 maximum height of any matrix in the sequence. The matrix width of
1828 a horizontal sequence is computed by adding up matrix widths of
1829 windows in the sequence.
1831 |<------- result width ------->|
1832 +---------+----------+---------+ ---
1835 +---------+ | | result height
1840 The matrix width of a vertical sequence is the maximum matrix width
1841 of any window in the sequence. Its height is computed by adding up
1842 matrix heights of windows in the sequence.
1844 |<---- result width -->|
1852 +------------+---------+ |
1855 +------------+---------+ --- */
1857 /* Bit indicating that a new matrix will be allocated or has been
1860 #define NEW_LEAF_MATRIX (1 << 0)
1862 /* Bit indicating that a matrix will or has changed its location or
1865 #define CHANGED_LEAF_MATRIX (1 << 1)
1868 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1869 window_change_flags
)
1873 int *window_change_flags
;
1875 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1877 int wmax
= 0, hmax
= 0;
1881 int in_horz_combination_p
;
1883 /* What combination is WINDOW part of? Compute this once since the
1884 result is the same for all windows in the `next' chain. The
1885 special case of a root window (parent equal to nil) is treated
1886 like a vertical combination because a root window's `next'
1887 points to the mini-buffer window, if any, which is arranged
1888 vertically below other windows. */
1889 in_horz_combination_p
1890 = (!NILP (XWINDOW (window
)->parent
)
1891 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1893 /* For WINDOW and all windows on the same level. */
1896 w
= XWINDOW (window
);
1898 /* Get the dimension of the window sub-matrix for W, depending
1899 on whether this is a combination or a leaf window. */
1900 if (!NILP (w
->hchild
))
1901 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1903 window_change_flags
);
1904 else if (!NILP (w
->vchild
))
1905 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1907 window_change_flags
);
1910 /* If not already done, allocate sub-matrix structures. */
1911 if (w
->desired_matrix
== NULL
)
1913 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1914 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1915 *window_change_flags
|= NEW_LEAF_MATRIX
;
1918 /* Width and height MUST be chosen so that there are no
1919 holes in the frame matrix. */
1920 dim
.width
= required_matrix_width (w
);
1921 dim
.height
= required_matrix_height (w
);
1923 /* Will matrix be re-allocated? */
1924 if (x
!= w
->desired_matrix
->matrix_x
1925 || y
!= w
->desired_matrix
->matrix_y
1926 || dim
.width
!= w
->desired_matrix
->matrix_w
1927 || dim
.height
!= w
->desired_matrix
->matrix_h
1928 || (margin_glyphs_to_reserve (w
, dim
.width
,
1929 w
->left_margin_cols
)
1930 != w
->desired_matrix
->left_margin_glyphs
)
1931 || (margin_glyphs_to_reserve (w
, dim
.width
,
1932 w
->right_margin_cols
)
1933 != w
->desired_matrix
->right_margin_glyphs
))
1934 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1936 /* Actually change matrices, if allowed. Do not consider
1937 CHANGED_LEAF_MATRIX computed above here because the pool
1938 may have been changed which we don't now here. We trust
1939 that we only will be called with DIM_ONLY_P != 0 when
1943 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1944 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1948 /* If we are part of a horizontal combination, advance x for
1949 windows to the right of W; otherwise advance y for windows
1951 if (in_horz_combination_p
)
1956 /* Remember maximum glyph matrix dimensions. */
1957 wmax
= max (wmax
, dim
.width
);
1958 hmax
= max (hmax
, dim
.height
);
1960 /* Next window on same level. */
1963 while (!NILP (window
));
1965 /* Set `total' to the total glyph matrix dimension of this window
1966 level. In a vertical combination, the width is the width of the
1967 widest window; the height is the y we finally reached, corrected
1968 by the y we started with. In a horizontal combination, the total
1969 height is the height of the tallest window, and the width is the
1970 x we finally reached, corrected by the x we started with. */
1971 if (in_horz_combination_p
)
1973 total
.width
= x
- x0
;
1974 total
.height
= hmax
;
1979 total
.height
= y
- y0
;
1986 /* Return the required height of glyph matrices for window W. */
1989 required_matrix_height (w
)
1992 #ifdef HAVE_WINDOW_SYSTEM
1993 struct frame
*f
= XFRAME (w
->frame
);
1995 if (FRAME_WINDOW_P (f
))
1997 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1998 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
1999 return (((window_pixel_height
+ ch_height
- 1)
2000 / ch_height
) * w
->nrows_scale_factor
2001 /* One partially visible line at the top and
2002 bottom of the window. */
2004 /* 2 for header and mode line. */
2007 #endif /* HAVE_WINDOW_SYSTEM */
2009 return WINDOW_TOTAL_LINES (w
);
2013 /* Return the required width of glyph matrices for window W. */
2016 required_matrix_width (w
)
2019 #ifdef HAVE_WINDOW_SYSTEM
2020 struct frame
*f
= XFRAME (w
->frame
);
2021 if (FRAME_WINDOW_P (f
))
2023 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
2024 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
2026 /* Compute number of glyphs needed in a glyph row. */
2027 return (((window_pixel_width
+ ch_width
- 1)
2028 / ch_width
) * w
->ncols_scale_factor
2029 /* 2 partially visible columns in the text area. */
2031 /* One partially visible column at the right
2032 edge of each marginal area. */
2035 #endif /* HAVE_WINDOW_SYSTEM */
2037 return XINT (w
->total_cols
);
2041 /* Allocate window matrices for window-based redisplay. W is the
2042 window whose matrices must be allocated/reallocated. */
2045 allocate_matrices_for_window_redisplay (w
)
2050 if (!NILP (w
->vchild
))
2051 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
2052 else if (!NILP (w
->hchild
))
2053 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
2056 /* W is a leaf window. */
2059 /* If matrices are not yet allocated, allocate them now. */
2060 if (w
->desired_matrix
== NULL
)
2062 w
->desired_matrix
= new_glyph_matrix (NULL
);
2063 w
->current_matrix
= new_glyph_matrix (NULL
);
2066 dim
.width
= required_matrix_width (w
);
2067 dim
.height
= required_matrix_height (w
);
2068 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
2069 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
2072 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
2077 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
2078 do it for all frames; otherwise do it just for the given frame.
2079 This function must be called when a new frame is created, its size
2080 changes, or its window configuration changes. */
2086 /* Block input so that expose events and other events that access
2087 glyph matrices are not processed while we are changing them. */
2091 adjust_frame_glyphs (f
);
2094 Lisp_Object tail
, lisp_frame
;
2096 FOR_EACH_FRAME (tail
, lisp_frame
)
2097 adjust_frame_glyphs (XFRAME (lisp_frame
));
2104 /* Adjust frame glyphs when Emacs is initialized.
2106 To be called from init_display.
2108 We need a glyph matrix because redraw will happen soon.
2109 Unfortunately, window sizes on selected_frame are not yet set to
2110 meaningful values. I believe we can assume that there are only two
2111 windows on the frame---the mini-buffer and the root window. Frame
2112 height and width seem to be correct so far. So, set the sizes of
2113 windows to estimated values. */
2116 adjust_frame_glyphs_initially ()
2118 struct frame
*sf
= SELECTED_FRAME ();
2119 struct window
*root
= XWINDOW (sf
->root_window
);
2120 struct window
*mini
= XWINDOW (root
->next
);
2121 int frame_lines
= FRAME_LINES (sf
);
2122 int frame_cols
= FRAME_COLS (sf
);
2123 int top_margin
= FRAME_TOP_MARGIN (sf
);
2125 /* Do it for the root window. */
2126 XSETFASTINT (root
->top_line
, top_margin
);
2127 XSETFASTINT (root
->total_cols
, frame_cols
);
2128 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2130 /* Do it for the mini-buffer window. */
2131 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2132 XSETFASTINT (mini
->total_cols
, frame_cols
);
2133 set_window_height (root
->next
, 1, 0);
2135 adjust_frame_glyphs (sf
);
2136 glyphs_initialized_initially_p
= 1;
2140 /* Allocate/reallocate glyph matrices of a single frame F. */
2143 adjust_frame_glyphs (f
)
2146 if (FRAME_WINDOW_P (f
))
2147 adjust_frame_glyphs_for_window_redisplay (f
);
2149 adjust_frame_glyphs_for_frame_redisplay (f
);
2151 /* Don't forget the message buffer and the buffer for
2152 decode_mode_spec. */
2153 adjust_frame_message_buffer (f
);
2154 adjust_decode_mode_spec_buffer (f
);
2156 f
->glyphs_initialized_p
= 1;
2159 /* Return 1 if any window in the tree has nonzero window margins. See
2160 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2162 showing_window_margins_p (w
)
2167 if (!NILP (w
->hchild
))
2169 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2172 else if (!NILP (w
->vchild
))
2174 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2177 else if (!NILP (w
->left_margin_cols
)
2178 || !NILP (w
->right_margin_cols
))
2181 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2187 /* In the window tree with root W, build current matrices of leaf
2188 windows from the frame's current matrix. */
2191 fake_current_matrices (window
)
2196 for (; !NILP (window
); window
= w
->next
)
2198 w
= XWINDOW (window
);
2200 if (!NILP (w
->hchild
))
2201 fake_current_matrices (w
->hchild
);
2202 else if (!NILP (w
->vchild
))
2203 fake_current_matrices (w
->vchild
);
2207 struct frame
*f
= XFRAME (w
->frame
);
2208 struct glyph_matrix
*m
= w
->current_matrix
;
2209 struct glyph_matrix
*fm
= f
->current_matrix
;
2211 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2212 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2214 for (i
= 0; i
< m
->matrix_h
; ++i
)
2216 struct glyph_row
*r
= m
->rows
+ i
;
2217 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2219 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2220 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2222 r
->enabled_p
= fr
->enabled_p
;
2225 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2226 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2227 r
->used
[TEXT_AREA
] = (m
->matrix_w
2228 - r
->used
[LEFT_MARGIN_AREA
]
2229 - r
->used
[RIGHT_MARGIN_AREA
]);
2238 /* Save away the contents of frame F's current frame matrix. Value is
2239 a glyph matrix holding the contents of F's current frame matrix. */
2241 static struct glyph_matrix
*
2242 save_current_matrix (f
)
2246 struct glyph_matrix
*saved
;
2248 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2249 bzero (saved
, sizeof *saved
);
2250 saved
->nrows
= f
->current_matrix
->nrows
;
2251 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2252 * sizeof *saved
->rows
);
2253 bzero (saved
->rows
, saved
->nrows
* sizeof *saved
->rows
);
2255 for (i
= 0; i
< saved
->nrows
; ++i
)
2257 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2258 struct glyph_row
*to
= saved
->rows
+ i
;
2259 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2260 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2261 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2262 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2269 /* Restore the contents of frame F's current frame matrix from SAVED,
2270 and free memory associated with SAVED. */
2273 restore_current_matrix (f
, saved
)
2275 struct glyph_matrix
*saved
;
2279 for (i
= 0; i
< saved
->nrows
; ++i
)
2281 struct glyph_row
*from
= saved
->rows
+ i
;
2282 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2283 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2284 bcopy (from
->glyphs
[TEXT_AREA
], to
->glyphs
[TEXT_AREA
], nbytes
);
2285 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2286 xfree (from
->glyphs
[TEXT_AREA
]);
2289 xfree (saved
->rows
);
2295 /* Allocate/reallocate glyph matrices of a single frame F for
2296 frame-based redisplay. */
2299 adjust_frame_glyphs_for_frame_redisplay (f
)
2302 struct dim matrix_dim
;
2304 int window_change_flags
;
2307 if (!FRAME_LIVE_P (f
))
2310 top_window_y
= FRAME_TOP_MARGIN (f
);
2312 /* Allocate glyph pool structures if not already done. */
2313 if (f
->desired_pool
== NULL
)
2315 f
->desired_pool
= new_glyph_pool ();
2316 f
->current_pool
= new_glyph_pool ();
2319 /* Allocate frames matrix structures if needed. */
2320 if (f
->desired_matrix
== NULL
)
2322 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2323 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2326 /* Compute window glyph matrices. (This takes the mini-buffer
2327 window into account). The result is the size of the frame glyph
2328 matrix needed. The variable window_change_flags is set to a bit
2329 mask indicating whether new matrices will be allocated or
2330 existing matrices change their size or location within the frame
2332 window_change_flags
= 0;
2334 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2337 &window_change_flags
);
2339 /* Add in menu bar lines, if any. */
2340 matrix_dim
.height
+= top_window_y
;
2342 /* Enlarge pools as necessary. */
2343 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2344 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2346 /* Set up glyph pointers within window matrices. Do this only if
2347 absolutely necessary since it requires a frame redraw. */
2348 if (pool_changed_p
|| window_change_flags
)
2350 /* Do it for window matrices. */
2351 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2353 &window_change_flags
);
2355 /* Size of frame matrices must equal size of frame. Note
2356 that we are called for X frames with window widths NOT equal
2357 to the frame width (from CHANGE_FRAME_SIZE_1). */
2358 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2359 && matrix_dim
.height
== FRAME_LINES (f
));
2361 /* Pointers to glyph memory in glyph rows are exchanged during
2362 the update phase of redisplay, which means in general that a
2363 frame's current matrix consists of pointers into both the
2364 desired and current glyph pool of the frame. Adjusting a
2365 matrix sets the frame matrix up so that pointers are all into
2366 the same pool. If we want to preserve glyph contents of the
2367 current matrix over a call to adjust_glyph_matrix, we must
2368 make a copy of the current glyphs, and restore the current
2369 matrix' contents from that copy. */
2370 if (display_completed
2371 && !FRAME_GARBAGED_P (f
)
2372 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2373 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2374 /* For some reason, the frame glyph matrix gets corrupted if
2375 any of the windows contain margins. I haven't been able
2376 to hunt down the reason, but for the moment this prevents
2377 the problem from manifesting. -- cyd */
2378 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2380 struct glyph_matrix
*copy
= save_current_matrix (f
);
2381 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2382 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2383 restore_current_matrix (f
, copy
);
2384 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2388 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2389 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2390 SET_FRAME_GARBAGED (f
);
2396 /* Allocate/reallocate glyph matrices of a single frame F for
2397 window-based redisplay. */
2400 adjust_frame_glyphs_for_window_redisplay (f
)
2405 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2407 /* Allocate/reallocate window matrices. */
2408 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2410 #ifdef HAVE_X_WINDOWS
2411 /* Allocate/ reallocate matrices of the dummy window used to display
2412 the menu bar under X when no X toolkit support is available. */
2413 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2415 /* Allocate a dummy window if not already done. */
2416 if (NILP (f
->menu_bar_window
))
2418 f
->menu_bar_window
= make_window ();
2419 w
= XWINDOW (f
->menu_bar_window
);
2420 XSETFRAME (w
->frame
, f
);
2421 w
->pseudo_window_p
= 1;
2424 w
= XWINDOW (f
->menu_bar_window
);
2426 /* Set window dimensions to frame dimensions and allocate or
2427 adjust glyph matrices of W. */
2428 XSETFASTINT (w
->top_line
, 0);
2429 XSETFASTINT (w
->left_col
, 0);
2430 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2431 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2432 allocate_matrices_for_window_redisplay (w
);
2434 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2435 #endif /* HAVE_X_WINDOWS */
2438 /* Allocate/ reallocate matrices of the tool bar window. If we
2439 don't have a tool bar window yet, make one. */
2440 if (NILP (f
->tool_bar_window
))
2442 f
->tool_bar_window
= make_window ();
2443 w
= XWINDOW (f
->tool_bar_window
);
2444 XSETFRAME (w
->frame
, f
);
2445 w
->pseudo_window_p
= 1;
2448 w
= XWINDOW (f
->tool_bar_window
);
2450 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2451 XSETFASTINT (w
->left_col
, 0);
2452 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2453 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2454 allocate_matrices_for_window_redisplay (w
);
2459 /* Adjust/ allocate message buffer of frame F.
2461 Note that the message buffer is never freed. Since I could not
2462 find a free in 19.34, I assume that freeing it would be
2463 problematic in some way and don't do it either.
2465 (Implementation note: It should be checked if we can free it
2466 eventually without causing trouble). */
2469 adjust_frame_message_buffer (f
)
2472 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2474 if (FRAME_MESSAGE_BUF (f
))
2476 char *buffer
= FRAME_MESSAGE_BUF (f
);
2477 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2478 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2481 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2485 /* Re-allocate buffer for decode_mode_spec on frame F. */
2488 adjust_decode_mode_spec_buffer (f
)
2491 f
->decode_mode_spec_buffer
2492 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2493 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2498 /**********************************************************************
2499 Freeing Glyph Matrices
2500 **********************************************************************/
2502 /* Free glyph memory for a frame F. F may be null. This function can
2503 be called for the same frame more than once. The root window of
2504 F may be nil when this function is called. This is the case when
2505 the function is called when F is destroyed. */
2511 if (f
&& f
->glyphs_initialized_p
)
2513 /* Block interrupt input so that we don't get surprised by an X
2514 event while we're in an inconsistent state. */
2516 f
->glyphs_initialized_p
= 0;
2518 /* Release window sub-matrices. */
2519 if (!NILP (f
->root_window
))
2520 free_window_matrices (XWINDOW (f
->root_window
));
2522 /* Free the dummy window for menu bars without X toolkit and its
2524 if (!NILP (f
->menu_bar_window
))
2526 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2527 free_glyph_matrix (w
->desired_matrix
);
2528 free_glyph_matrix (w
->current_matrix
);
2529 w
->desired_matrix
= w
->current_matrix
= NULL
;
2530 f
->menu_bar_window
= Qnil
;
2533 /* Free the tool bar window and its glyph matrices. */
2534 if (!NILP (f
->tool_bar_window
))
2536 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2537 free_glyph_matrix (w
->desired_matrix
);
2538 free_glyph_matrix (w
->current_matrix
);
2539 w
->desired_matrix
= w
->current_matrix
= NULL
;
2540 f
->tool_bar_window
= Qnil
;
2543 /* Release frame glyph matrices. Reset fields to zero in
2544 case we are called a second time. */
2545 if (f
->desired_matrix
)
2547 free_glyph_matrix (f
->desired_matrix
);
2548 free_glyph_matrix (f
->current_matrix
);
2549 f
->desired_matrix
= f
->current_matrix
= NULL
;
2552 /* Release glyph pools. */
2553 if (f
->desired_pool
)
2555 free_glyph_pool (f
->desired_pool
);
2556 free_glyph_pool (f
->current_pool
);
2557 f
->desired_pool
= f
->current_pool
= NULL
;
2565 /* Free glyph sub-matrices in the window tree rooted at W. This
2566 function may be called with a null pointer, and it may be called on
2567 the same tree more than once. */
2570 free_window_matrices (w
)
2575 if (!NILP (w
->hchild
))
2576 free_window_matrices (XWINDOW (w
->hchild
));
2577 else if (!NILP (w
->vchild
))
2578 free_window_matrices (XWINDOW (w
->vchild
));
2581 /* This is a leaf window. Free its memory and reset fields
2582 to zero in case this function is called a second time for
2584 free_glyph_matrix (w
->current_matrix
);
2585 free_glyph_matrix (w
->desired_matrix
);
2586 w
->current_matrix
= w
->desired_matrix
= NULL
;
2589 /* Next window on same level. */
2590 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2595 /* Check glyph memory leaks. This function is called from
2596 shut_down_emacs. Note that frames are not destroyed when Emacs
2597 exits. We therefore free all glyph memory for all active frames
2598 explicitly and check that nothing is left allocated. */
2601 check_glyph_memory ()
2603 Lisp_Object tail
, frame
;
2605 /* Free glyph memory for all frames. */
2606 FOR_EACH_FRAME (tail
, frame
)
2607 free_glyphs (XFRAME (frame
));
2609 /* Check that nothing is left allocated. */
2610 if (glyph_matrix_count
)
2612 if (glyph_pool_count
)
2618 /**********************************************************************
2619 Building a Frame Matrix
2620 **********************************************************************/
2622 /* Most of the redisplay code works on glyph matrices attached to
2623 windows. This is a good solution most of the time, but it is not
2624 suitable for terminal code. Terminal output functions cannot rely
2625 on being able to set an arbitrary terminal window. Instead they
2626 must be provided with a view of the whole frame, i.e. the whole
2627 screen. We build such a view by constructing a frame matrix from
2628 window matrices in this section.
2630 Windows that must be updated have their must_be_update_p flag set.
2631 For all such windows, their desired matrix is made part of the
2632 desired frame matrix. For other windows, their current matrix is
2633 made part of the desired frame matrix.
2635 +-----------------+----------------+
2636 | desired | desired |
2638 +-----------------+----------------+
2641 +----------------------------------+
2643 Desired window matrices can be made part of the frame matrix in a
2644 cheap way: We exploit the fact that the desired frame matrix and
2645 desired window matrices share their glyph memory. This is not
2646 possible for current window matrices. Their glyphs are copied to
2647 the desired frame matrix. The latter is equivalent to
2648 preserve_other_columns in the old redisplay.
2650 Used glyphs counters for frame matrix rows are the result of adding
2651 up glyph lengths of the window matrices. A line in the frame
2652 matrix is enabled, if a corresponding line in a window matrix is
2655 After building the desired frame matrix, it will be passed to
2656 terminal code, which will manipulate both the desired and current
2657 frame matrix. Changes applied to the frame's current matrix have
2658 to be visible in current window matrices afterwards, of course.
2660 This problem is solved like this:
2662 1. Window and frame matrices share glyphs. Window matrices are
2663 constructed in a way that their glyph contents ARE the glyph
2664 contents needed in a frame matrix. Thus, any modification of
2665 glyphs done in terminal code will be reflected in window matrices
2668 2. Exchanges of rows in a frame matrix done by terminal code are
2669 intercepted by hook functions so that corresponding row operations
2670 on window matrices can be performed. This is necessary because we
2671 use pointers to glyphs in glyph row structures. To satisfy the
2672 assumption of point 1 above that glyphs are updated implicitly in
2673 window matrices when they are manipulated via the frame matrix,
2674 window and frame matrix must of course agree where to find the
2675 glyphs for their rows. Possible manipulations that must be
2676 mirrored are assignments of rows of the desired frame matrix to the
2677 current frame matrix and scrolling the current frame matrix. */
2679 /* Build frame F's desired matrix from window matrices. Only windows
2680 which have the flag must_be_updated_p set have to be updated. Menu
2681 bar lines of a frame are not covered by window matrices, so make
2682 sure not to touch them in this function. */
2685 build_frame_matrix (f
)
2690 /* F must have a frame matrix when this function is called. */
2691 xassert (!FRAME_WINDOW_P (f
));
2693 /* Clear all rows in the frame matrix covered by window matrices.
2694 Menu bar lines are not covered by windows. */
2695 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2696 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2698 /* Build the matrix by walking the window tree. */
2699 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2700 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2704 /* Walk a window tree, building a frame matrix MATRIX from window
2705 matrices. W is the root of a window tree. */
2708 build_frame_matrix_from_window_tree (matrix
, w
)
2709 struct glyph_matrix
*matrix
;
2714 if (!NILP (w
->hchild
))
2715 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2716 else if (!NILP (w
->vchild
))
2717 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2719 build_frame_matrix_from_leaf_window (matrix
, w
);
2721 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2726 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2727 desired frame matrix built. W is a leaf window whose desired or
2728 current matrix is to be added to FRAME_MATRIX. W's flag
2729 must_be_updated_p determines which matrix it contributes to
2730 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2731 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2732 Adding a desired matrix means setting up used counters and such in
2733 frame rows, while adding a current window matrix to FRAME_MATRIX
2734 means copying glyphs. The latter case corresponds to
2735 preserve_other_columns in the old redisplay. */
2738 build_frame_matrix_from_leaf_window (frame_matrix
, w
)
2739 struct glyph_matrix
*frame_matrix
;
2742 struct glyph_matrix
*window_matrix
;
2743 int window_y
, frame_y
;
2744 /* If non-zero, a glyph to insert at the right border of W. */
2745 GLYPH right_border_glyph
;
2747 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2749 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2750 if (w
->must_be_updated_p
)
2752 window_matrix
= w
->desired_matrix
;
2754 /* Decide whether we want to add a vertical border glyph. */
2755 if (!WINDOW_RIGHTMOST_P (w
))
2757 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2760 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2762 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2763 && GLYPH_CODE_CHAR_VALID_P (gc
))
2765 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2766 spec_glyph_lookup_face (w
, &right_border_glyph
);
2769 if (GLYPH_FACE (right_border_glyph
) <= 0)
2770 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2774 window_matrix
= w
->current_matrix
;
2776 /* For all rows in the window matrix and corresponding rows in the
2779 frame_y
= window_matrix
->matrix_y
;
2780 while (window_y
< window_matrix
->nrows
)
2782 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2783 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2784 int current_row_p
= window_matrix
== w
->current_matrix
;
2786 /* Fill up the frame row with spaces up to the left margin of the
2788 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2790 /* Fill up areas in the window matrix row with spaces. */
2791 fill_up_glyph_row_with_spaces (window_row
);
2793 /* If only part of W's desired matrix has been built, and
2794 window_row wasn't displayed, use the corresponding current
2796 if (window_matrix
== w
->desired_matrix
2797 && !window_row
->enabled_p
)
2799 window_row
= w
->current_matrix
->rows
+ window_y
;
2805 /* Copy window row to frame row. */
2806 bcopy (window_row
->glyphs
[0],
2807 frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2808 window_matrix
->matrix_w
* sizeof (struct glyph
));
2812 xassert (window_row
->enabled_p
);
2814 /* Only when a desired row has been displayed, we want
2815 the corresponding frame row to be updated. */
2816 frame_row
->enabled_p
= 1;
2818 /* Maybe insert a vertical border between horizontally adjacent
2820 if (GLYPH_CHAR (right_border_glyph
) != 0)
2822 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2823 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2827 /* Window row window_y must be a slice of frame row
2829 xassert (glyph_row_slice_p (window_row
, frame_row
));
2831 /* If rows are in sync, we don't have to copy glyphs because
2832 frame and window share glyphs. */
2834 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2835 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2839 /* Set number of used glyphs in the frame matrix. Since we fill
2840 up with spaces, and visit leaf windows from left to right it
2841 can be done simply. */
2842 frame_row
->used
[TEXT_AREA
]
2843 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2851 /* Given a user-specified glyph, possibly including a Lisp-level face
2852 ID, return a glyph that has a realized face ID.
2853 This is used for glyphs displayed specially and not part of the text;
2854 for instance, vertical separators, truncation markers, etc. */
2857 spec_glyph_lookup_face (w
, glyph
)
2861 int lface_id
= GLYPH_FACE (*glyph
);
2862 /* Convert the glyph's specified face to a realized (cache) face. */
2865 int face_id
= merge_faces (XFRAME (w
->frame
),
2866 Qt
, lface_id
, DEFAULT_FACE_ID
);
2867 SET_GLYPH_FACE (*glyph
, face_id
);
2871 /* Add spaces to a glyph row ROW in a window matrix.
2873 Each row has the form:
2875 +---------+-----------------------------+------------+
2876 | left | text | right |
2877 +---------+-----------------------------+------------+
2879 Left and right marginal areas are optional. This function adds
2880 spaces to areas so that there are no empty holes between areas.
2881 In other words: If the right area is not empty, the text area
2882 is filled up with spaces up to the right area. If the text area
2883 is not empty, the left area is filled up.
2885 To be called for frame-based redisplay, only. */
2888 fill_up_glyph_row_with_spaces (row
)
2889 struct glyph_row
*row
;
2891 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2892 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2893 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2897 /* Fill area AREA of glyph row ROW with spaces. To be called for
2898 frame-based redisplay only. */
2901 fill_up_glyph_row_area_with_spaces (row
, area
)
2902 struct glyph_row
*row
;
2905 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2907 struct glyph
*end
= row
->glyphs
[area
+ 1];
2908 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2911 *text
++ = space_glyph
;
2912 row
->used
[area
] = text
- row
->glyphs
[area
];
2917 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2918 reached. In frame matrices only one area, TEXT_AREA, is used. */
2921 fill_up_frame_row_with_spaces (row
, upto
)
2922 struct glyph_row
*row
;
2925 int i
= row
->used
[TEXT_AREA
];
2926 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2929 glyph
[i
++] = space_glyph
;
2931 row
->used
[TEXT_AREA
] = i
;
2936 /**********************************************************************
2937 Mirroring operations on frame matrices in window matrices
2938 **********************************************************************/
2940 /* Set frame being updated via frame-based redisplay to F. This
2941 function must be called before updates to make explicit that we are
2942 working on frame matrices or not. */
2945 set_frame_matrix_frame (f
)
2948 frame_matrix_frame
= f
;
2952 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2953 DESIRED_MATRIX is the desired matrix corresponding to
2954 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2955 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2956 frame_matrix_frame is non-null, this indicates that the exchange is
2957 done in frame matrices, and that we have to perform analogous
2958 operations in window matrices of frame_matrix_frame. */
2961 make_current (desired_matrix
, current_matrix
, row
)
2962 struct glyph_matrix
*desired_matrix
, *current_matrix
;
2965 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2966 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2967 int mouse_face_p
= current_row
->mouse_face_p
;
2969 /* Do current_row = desired_row. This exchanges glyph pointers
2970 between both rows, and does a structure assignment otherwise. */
2971 assign_row (current_row
, desired_row
);
2973 /* Enable current_row to mark it as valid. */
2974 current_row
->enabled_p
= 1;
2975 current_row
->mouse_face_p
= mouse_face_p
;
2977 /* If we are called on frame matrices, perform analogous operations
2978 for window matrices. */
2979 if (frame_matrix_frame
)
2980 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2984 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2985 W's frame which has been made current (by swapping pointers between
2986 current and desired matrix). Perform analogous operations in the
2987 matrices of leaf windows in the window tree rooted at W. */
2990 mirror_make_current (w
, frame_row
)
2996 if (!NILP (w
->hchild
))
2997 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2998 else if (!NILP (w
->vchild
))
2999 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
3002 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
3003 here because the checks performed in debug mode there
3004 will not allow the conversion. */
3005 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
3007 /* If FRAME_ROW is within W, assign the desired row to the
3008 current row (exchanging glyph pointers). */
3009 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
3011 struct glyph_row
*current_row
3012 = MATRIX_ROW (w
->current_matrix
, row
);
3013 struct glyph_row
*desired_row
3014 = MATRIX_ROW (w
->desired_matrix
, row
);
3016 if (desired_row
->enabled_p
)
3017 assign_row (current_row
, desired_row
);
3019 swap_glyph_pointers (desired_row
, current_row
);
3020 current_row
->enabled_p
= 1;
3024 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3029 /* Perform row dance after scrolling. We are working on the range of
3030 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
3031 including) in MATRIX. COPY_FROM is a vector containing, for each
3032 row I in the range 0 <= I < NLINES, the index of the original line
3033 to move to I. This index is relative to the row range, i.e. 0 <=
3034 index < NLINES. RETAINED_P is a vector containing zero for each
3035 row 0 <= I < NLINES which is empty.
3037 This function is called from do_scrolling and do_direct_scrolling. */
3040 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
3042 struct glyph_matrix
*matrix
;
3043 int unchanged_at_top
, nlines
;
3047 /* A copy of original rows. */
3048 struct glyph_row
*old_rows
;
3050 /* Rows to assign to. */
3051 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
3055 /* Make a copy of the original rows. */
3056 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
3057 bcopy (new_rows
, old_rows
, nlines
* sizeof *old_rows
);
3059 /* Assign new rows, maybe clear lines. */
3060 for (i
= 0; i
< nlines
; ++i
)
3062 int enabled_before_p
= new_rows
[i
].enabled_p
;
3064 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
3065 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
3066 new_rows
[i
] = old_rows
[copy_from
[i
]];
3067 new_rows
[i
].enabled_p
= enabled_before_p
;
3069 /* RETAINED_P is zero for empty lines. */
3070 if (!retained_p
[copy_from
[i
]])
3071 new_rows
[i
].enabled_p
= 0;
3074 /* Do the same for window matrices, if MATRIX is a frame matrix. */
3075 if (frame_matrix_frame
)
3076 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
3077 unchanged_at_top
, nlines
, copy_from
, retained_p
);
3081 /* Synchronize glyph pointers in the current matrix of window W with
3082 the current frame matrix. */
3085 sync_window_with_frame_matrix_rows (w
)
3088 struct frame
*f
= XFRAME (w
->frame
);
3089 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
3090 int left
, right
, x
, width
;
3092 /* Preconditions: W must be a leaf window on a tty frame. */
3093 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
3094 xassert (!FRAME_WINDOW_P (f
));
3096 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
3097 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
3098 x
= w
->current_matrix
->matrix_x
;
3099 width
= w
->current_matrix
->matrix_w
;
3101 window_row
= w
->current_matrix
->rows
;
3102 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
3103 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
3105 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
3107 window_row
->glyphs
[LEFT_MARGIN_AREA
]
3108 = frame_row
->glyphs
[0] + x
;
3109 window_row
->glyphs
[TEXT_AREA
]
3110 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
3111 window_row
->glyphs
[LAST_AREA
]
3112 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
3113 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
3114 = window_row
->glyphs
[LAST_AREA
] - right
;
3119 /* Return the window in the window tree rooted in W containing frame
3120 row ROW. Value is null if none is found. */
3123 frame_row_to_window (w
, row
)
3127 struct window
*found
= NULL
;
3131 if (!NILP (w
->hchild
))
3132 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3133 else if (!NILP (w
->vchild
))
3134 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3135 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3136 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3139 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3146 /* Perform a line dance in the window tree rooted at W, after
3147 scrolling a frame matrix in mirrored_line_dance.
3149 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3150 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3151 COPY_FROM is a vector containing, for each row I in the range 0 <=
3152 I < NLINES, the index of the original line to move to I. This
3153 index is relative to the row range, i.e. 0 <= index < NLINES.
3154 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3158 mirror_line_dance (w
, unchanged_at_top
, nlines
, copy_from
, retained_p
)
3160 int unchanged_at_top
, nlines
;
3166 if (!NILP (w
->hchild
))
3167 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3168 nlines
, copy_from
, retained_p
);
3169 else if (!NILP (w
->vchild
))
3170 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3171 nlines
, copy_from
, retained_p
);
3174 /* W is a leaf window, and we are working on its current
3176 struct glyph_matrix
*m
= w
->current_matrix
;
3178 struct glyph_row
*old_rows
;
3180 /* Make a copy of the original rows of matrix m. */
3181 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3182 bcopy (m
->rows
, old_rows
, m
->nrows
* sizeof *old_rows
);
3184 for (i
= 0; i
< nlines
; ++i
)
3186 /* Frame relative line assigned to. */
3187 int frame_to
= i
+ unchanged_at_top
;
3189 /* Frame relative line assigned. */
3190 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3192 /* Window relative line assigned to. */
3193 int window_to
= frame_to
- m
->matrix_y
;
3195 /* Window relative line assigned. */
3196 int window_from
= frame_from
- m
->matrix_y
;
3198 /* Is assigned line inside window? */
3199 int from_inside_window_p
3200 = window_from
>= 0 && window_from
< m
->matrix_h
;
3202 /* Is assigned to line inside window? */
3203 int to_inside_window_p
3204 = window_to
>= 0 && window_to
< m
->matrix_h
;
3206 if (from_inside_window_p
&& to_inside_window_p
)
3208 /* Enabled setting before assignment. */
3209 int enabled_before_p
;
3211 /* Do the assignment. The enabled_p flag is saved
3212 over the assignment because the old redisplay did
3214 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3215 m
->rows
[window_to
] = old_rows
[window_from
];
3216 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3218 /* If frame line is empty, window line is empty, too. */
3219 if (!retained_p
[copy_from
[i
]])
3220 m
->rows
[window_to
].enabled_p
= 0;
3222 else if (to_inside_window_p
)
3224 /* A copy between windows. This is an infrequent
3225 case not worth optimizing. */
3226 struct frame
*f
= XFRAME (w
->frame
);
3227 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3229 struct glyph_matrix
*m2
;
3232 w2
= frame_row_to_window (root
, frame_from
);
3233 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3234 -nw', FROM_FRAME sometimes has no associated window.
3235 This check avoids a segfault if W2 is null. */
3238 m2
= w2
->current_matrix
;
3239 m2_from
= frame_from
- m2
->matrix_y
;
3240 copy_row_except_pointers (m
->rows
+ window_to
,
3241 m2
->rows
+ m2_from
);
3243 /* If frame line is empty, window line is empty, too. */
3244 if (!retained_p
[copy_from
[i
]])
3245 m
->rows
[window_to
].enabled_p
= 0;
3249 else if (from_inside_window_p
)
3253 /* If there was a copy between windows, make sure glyph
3254 pointers are in sync with the frame matrix. */
3256 sync_window_with_frame_matrix_rows (w
);
3258 /* Check that no pointers are lost. */
3262 /* Next window on same level. */
3263 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3270 /* Check that window and frame matrices agree about their
3271 understanding where glyphs of the rows are to find. For each
3272 window in the window tree rooted at W, check that rows in the
3273 matrices of leaf window agree with their frame matrices about
3277 check_window_matrix_pointers (w
)
3282 if (!NILP (w
->hchild
))
3283 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3284 else if (!NILP (w
->vchild
))
3285 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3288 struct frame
*f
= XFRAME (w
->frame
);
3289 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3290 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3293 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3298 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3299 a window and FRAME_MATRIX is the corresponding frame matrix. For
3300 each row in WINDOW_MATRIX check that it's a slice of the
3301 corresponding frame row. If it isn't, abort. */
3304 check_matrix_pointers (window_matrix
, frame_matrix
)
3305 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3307 /* Row number in WINDOW_MATRIX. */
3310 /* Row number corresponding to I in FRAME_MATRIX. */
3311 int j
= window_matrix
->matrix_y
;
3313 /* For all rows check that the row in the window matrix is a
3314 slice of the row in the frame matrix. If it isn't we didn't
3315 mirror an operation on the frame matrix correctly. */
3316 while (i
< window_matrix
->nrows
)
3318 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3319 frame_matrix
->rows
+ j
))
3325 #endif /* GLYPH_DEBUG != 0 */
3329 /**********************************************************************
3330 VPOS and HPOS translations
3331 **********************************************************************/
3335 /* Translate vertical position VPOS which is relative to window W to a
3336 vertical position relative to W's frame. */
3339 window_to_frame_vpos (w
, vpos
)
3343 struct frame
*f
= XFRAME (w
->frame
);
3345 xassert (!FRAME_WINDOW_P (f
));
3346 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3347 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3348 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3353 /* Translate horizontal position HPOS which is relative to window W to
3354 a horizontal position relative to W's frame. */
3357 window_to_frame_hpos (w
, hpos
)
3361 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3362 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3366 #endif /* GLYPH_DEBUG */
3370 /**********************************************************************
3372 **********************************************************************/
3374 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3375 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3381 CHECK_LIVE_FRAME (frame
);
3384 /* Ignore redraw requests, if frame has no glyphs yet.
3385 (Implementation note: It still has to be checked why we are
3386 called so early here). */
3387 if (!glyphs_initialized_initially_p
)
3392 if (FRAME_MSDOS_P (f
))
3393 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3396 clear_current_matrices (f
);
3398 if (FRAME_TERMCAP_P (f
))
3399 fflush (FRAME_TTY (f
)->output
);
3400 windows_or_buffers_changed
++;
3401 /* Mark all windows as inaccurate, so that every window will have
3402 its redisplay done. */
3403 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3404 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3410 /* Redraw frame F. This is nothing more than a call to the Lisp
3411 function redraw-frame. */
3418 XSETFRAME (frame
, f
);
3419 Fredraw_frame (frame
);
3423 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3424 doc
: /* Clear and redisplay all visible frames. */)
3427 Lisp_Object tail
, frame
;
3429 FOR_EACH_FRAME (tail
, frame
)
3430 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3431 Fredraw_frame (frame
);
3437 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3438 visible frames marked as garbaged. */
3441 redraw_garbaged_frames ()
3443 Lisp_Object tail
, frame
;
3445 FOR_EACH_FRAME (tail
, frame
)
3446 if (FRAME_VISIBLE_P (XFRAME (frame
))
3447 && FRAME_GARBAGED_P (XFRAME (frame
)))
3448 Fredraw_frame (frame
);
3453 /***********************************************************************
3455 ***********************************************************************/
3457 /* Try to update display and current glyph matrix directly.
3459 This function is called after a character G has been inserted into
3460 current_buffer. It tries to update the current glyph matrix and
3461 perform appropriate screen output to reflect the insertion. If it
3462 succeeds, the global flag redisplay_performed_directly_p will be
3463 set to 1, and thereby prevent the more costly general redisplay
3464 from running (see redisplay_internal).
3466 This function is not called for `hairy' character insertions.
3467 In particular, it is not called when after or before change
3468 functions exist, like they are used by font-lock. See keyboard.c
3469 for details where this function is called. */
3472 direct_output_for_insert (g
)
3475 register struct frame
*f
= SELECTED_FRAME ();
3476 struct window
*w
= XWINDOW (selected_window
);
3478 struct glyph_row
*glyph_row
;
3479 struct glyph
*glyphs
, *glyph
, *end
;
3481 /* Non-null means that redisplay of W is based on window matrices. */
3482 int window_redisplay_p
= FRAME_WINDOW_P (f
);
3483 /* Non-null means we are in overwrite mode. */
3484 int overwrite_p
= !NILP (current_buffer
->overwrite_mode
);
3486 struct text_pos pos
;
3487 int delta
, delta_bytes
;
3489 /* Not done directly. */
3490 redisplay_performed_directly_p
= 0;
3492 /* Quickly give up for some common cases. */
3493 if (cursor_in_echo_area
3494 /* Give up if fonts have changed. */
3496 /* Give up if face attributes have been changed. */
3497 || face_change_count
3498 /* Give up if cursor position not really known. */
3499 || !display_completed
3500 /* Give up if buffer appears in two places. */
3501 || buffer_shared
> 1
3502 /* Give up if currently displaying a message instead of the
3503 minibuffer contents. */
3504 || (EQ (selected_window
, minibuf_window
)
3505 && EQ (minibuf_window
, echo_area_window
))
3506 /* Give up for hscrolled mini-buffer because display of the prompt
3507 is handled specially there (see display_line). */
3508 || (MINI_WINDOW_P (w
) && XFASTINT (w
->hscroll
))
3509 /* Give up if overwriting in the middle of a line. */
3512 && FETCH_BYTE (PT
) != '\n')
3513 /* Give up for tabs and line ends. */
3517 || (g
== ' ' && !NILP (current_buffer
->word_wrap
))
3518 /* Give up if unable to display the cursor in the window. */
3519 || w
->cursor
.vpos
< 0
3520 /* Give up if we are showing a message or just cleared the message
3521 because we might need to resize the echo area window. */
3522 || !NILP (echo_area_buffer
[0])
3523 || !NILP (echo_area_buffer
[1])
3524 || (glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
),
3525 /* Can't do it in a continued line because continuation
3526 lines would change. */
3527 (glyph_row
->continued_p
3528 || glyph_row
->exact_window_width_line_p
3529 /* Can't use this method if the line overlaps others or is
3530 overlapped by others because these other lines would
3531 have to be redisplayed. */
3532 || glyph_row
->overlapping_p
3533 || glyph_row
->overlapped_p
))
3534 /* Can't do it for partial width windows on terminal frames
3535 because we can't clear to eol in such a window. */
3536 || (!window_redisplay_p
&& !WINDOW_FULL_WIDTH_P (w
)))
3539 /* If we can't insert glyphs, we can use this method only
3540 at the end of a line. */
3541 if (!FRAME_CHAR_INS_DEL_OK (f
))
3542 if (PT
!= ZV
&& FETCH_BYTE (PT_BYTE
) != '\n')
3545 /* Set up a display iterator structure for W. Glyphs will be
3546 produced in scratch_glyph_row. Current position is W's cursor
3548 clear_glyph_row (&scratch_glyph_row
);
3549 SET_TEXT_POS (pos
, PT
, PT_BYTE
);
3550 DEC_TEXT_POS (pos
, !NILP (current_buffer
->enable_multibyte_characters
));
3551 init_iterator (&it
, w
, CHARPOS (pos
), BYTEPOS (pos
), &scratch_glyph_row
,
3554 glyph_row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3555 if (glyph_row
->mouse_face_p
)
3558 /* Give up if highlighting trailing whitespace and we have trailing
3559 whitespace in glyph_row. We would have to remove the trailing
3560 whitespace face in that case. */
3561 if (!NILP (Vshow_trailing_whitespace
)
3562 && glyph_row
->used
[TEXT_AREA
])
3566 last
= glyph_row
->glyphs
[TEXT_AREA
] + glyph_row
->used
[TEXT_AREA
] - 1;
3567 if (last
->type
== STRETCH_GLYPH
3568 || (last
->type
== CHAR_GLYPH
3569 && last
->u
.ch
== ' '))
3573 /* Give up if there are overlay strings at pos. This would fail
3574 if the overlay string has newlines in it. */
3575 if (STRINGP (it
.string
))
3578 it
.hpos
= w
->cursor
.hpos
;
3579 it
.vpos
= w
->cursor
.vpos
;
3580 it
.current_x
= w
->cursor
.x
+ it
.first_visible_x
;
3581 it
.current_y
= w
->cursor
.y
;
3582 it
.end_charpos
= PT
;
3583 it
.stop_charpos
= min (PT
, it
.stop_charpos
);
3584 it
.stop_charpos
= max (IT_CHARPOS (it
), it
.stop_charpos
);
3586 /* More than one display element may be returned for PT - 1 if
3587 (i) it's a control character which is translated into `\003' or
3588 `^C', or (ii) it has a display table entry, or (iii) it's a
3589 combination of both. */
3590 delta
= delta_bytes
= 0;
3591 while (get_next_display_element (&it
))
3593 PRODUCE_GLYPHS (&it
);
3595 /* Give up if glyph doesn't fit completely on the line. */
3596 if (it
.current_x
>= it
.last_visible_x
)
3599 /* Give up if new glyph has different ascent or descent than
3600 the original row, or if it is not a character glyph. */
3601 if (glyph_row
->ascent
!= it
.ascent
3602 || glyph_row
->height
!= it
.ascent
+ it
.descent
3603 || glyph_row
->phys_ascent
!= it
.phys_ascent
3604 || glyph_row
->phys_height
!= it
.phys_ascent
+ it
.phys_descent
3605 || it
.what
!= IT_CHARACTER
)
3609 delta_bytes
+= it
.len
;
3610 set_iterator_to_next (&it
, 1);
3613 /* Give up if we hit the right edge of the window. We would have
3614 to insert truncation or continuation glyphs. */
3615 added_width
= it
.current_x
- (w
->cursor
.x
+ it
.first_visible_x
);
3616 if (glyph_row
->pixel_width
+ added_width
>= it
.last_visible_x
)
3619 /* Give up if there is a \t following in the line. */
3621 it2
.end_charpos
= ZV
;
3622 it2
.stop_charpos
= min (it2
.stop_charpos
, ZV
);
3623 while (get_next_display_element (&it2
)
3624 && !ITERATOR_AT_END_OF_LINE_P (&it2
))
3628 set_iterator_to_next (&it2
, 1);
3631 /* Number of new glyphs produced. */
3632 n
= it
.glyph_row
->used
[TEXT_AREA
];
3634 /* Start and end of glyphs in original row. */
3635 glyphs
= glyph_row
->glyphs
[TEXT_AREA
] + w
->cursor
.hpos
;
3636 end
= glyph_row
->glyphs
[1 + TEXT_AREA
];
3638 /* Make room for new glyphs, then insert them. */
3639 xassert (end
- glyphs
- n
>= 0);
3640 safe_bcopy ((char *) glyphs
, (char *) (glyphs
+ n
),
3641 (end
- glyphs
- n
) * sizeof (*end
));
3642 bcopy (it
.glyph_row
->glyphs
[TEXT_AREA
], glyphs
, n
* sizeof *glyphs
);
3643 glyph_row
->used
[TEXT_AREA
] = min (glyph_row
->used
[TEXT_AREA
] + n
,
3644 end
- glyph_row
->glyphs
[TEXT_AREA
]);
3646 /* Compute new line width. */
3647 glyph
= glyph_row
->glyphs
[TEXT_AREA
];
3648 end
= glyph
+ glyph_row
->used
[TEXT_AREA
];
3649 glyph_row
->pixel_width
= glyph_row
->x
;
3652 glyph_row
->pixel_width
+= glyph
->pixel_width
;
3656 /* Increment buffer positions for glyphs following the newly
3658 for (glyph
= glyphs
+ n
; glyph
< end
; ++glyph
)
3659 if (glyph
->charpos
> 0 && BUFFERP (glyph
->object
))
3660 glyph
->charpos
+= delta
;
3662 if (MATRIX_ROW_END_CHARPOS (glyph_row
) > 0)
3664 MATRIX_ROW_END_CHARPOS (glyph_row
) += delta
;
3665 MATRIX_ROW_END_BYTEPOS (glyph_row
) += delta_bytes
;
3668 /* Adjust positions in lines following the one we are in. */
3669 increment_matrix_positions (w
->current_matrix
,
3671 w
->current_matrix
->nrows
,
3672 delta
, delta_bytes
);
3674 glyph_row
->contains_overlapping_glyphs_p
3675 |= it
.glyph_row
->contains_overlapping_glyphs_p
;
3677 glyph_row
->displays_text_p
= 1;
3678 w
->window_end_vpos
= make_number (max (w
->cursor
.vpos
,
3679 XFASTINT (w
->window_end_vpos
)));
3681 if (!NILP (Vshow_trailing_whitespace
))
3682 highlight_trailing_whitespace (it
.f
, glyph_row
);
3684 /* Write glyphs. If at end of row, we can simply call write_glyphs.
3685 In the middle, we have to insert glyphs. Note that this is now
3686 implemented for X frames. The implementation uses updated_window
3688 updated_row
= glyph_row
;
3689 updated_area
= TEXT_AREA
;
3693 FRAME_RIF (f
)->update_window_begin_hook (w
);
3695 if (glyphs
== end
- n
3696 /* In front of a space added by append_space. */
3697 || (glyphs
== end
- n
- 1
3698 && (end
- n
)->charpos
<= 0))
3699 FRAME_RIF (f
)->write_glyphs (glyphs
, n
);
3701 FRAME_RIF (f
)->insert_glyphs (glyphs
, n
);
3705 if (glyphs
== end
- n
)
3706 write_glyphs (f
, glyphs
, n
);
3708 insert_glyphs (f
, glyphs
, n
);
3711 w
->cursor
.hpos
+= n
;
3712 w
->cursor
.x
= it
.current_x
- it
.first_visible_x
;
3713 xassert (w
->cursor
.hpos
>= 0
3714 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3716 /* How to set the cursor differs depending on whether we are
3717 using a frame matrix or a window matrix. Note that when
3718 a frame matrix is used, cursor_to expects frame coordinates,
3719 and the X and Y parameters are not used. */
3720 if (window_redisplay_p
)
3721 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3722 w
->cursor
.y
, w
->cursor
.x
);
3726 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3727 + (INTEGERP (w
->left_margin_cols
)
3728 ? XFASTINT (w
->left_margin_cols
)
3730 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3731 cursor_to (f
, y
, x
);
3734 #ifdef HAVE_WINDOW_SYSTEM
3735 update_window_fringes (w
, 0);
3739 FRAME_RIF (f
)->update_window_end_hook (w
, 1, 0);
3742 if (FRAME_TERMCAP_P (f
))
3743 fflush (FRAME_TTY (f
)->output
);
3745 TRACE ((stderr
, "direct output for insert\n"));
3746 mark_window_display_accurate (it
.window
, 1);
3747 redisplay_performed_directly_p
= 1;
3752 /* Perform a direct display update for moving PT by N positions
3753 left or right. N < 0 means a movement backwards. This function
3754 is currently only called for N == 1 or N == -1. */
3757 direct_output_forward_char (n
)
3760 struct frame
*f
= SELECTED_FRAME ();
3761 struct window
*w
= XWINDOW (selected_window
);
3762 struct glyph_row
*row
;
3764 /* Give up if point moved out of or into a composition. */
3765 if (check_point_in_composition (current_buffer
, XINT (w
->last_point
),
3766 current_buffer
, PT
))
3769 /* Give up if face attributes have been changed. */
3770 if (face_change_count
)
3773 /* Give up if current matrix is not up to date or we are
3774 displaying a message. */
3775 if (!display_completed
|| cursor_in_echo_area
)
3778 /* Give up if the buffer's direction is reversed. */
3779 if (!NILP (XBUFFER (w
->buffer
)->direction_reversed
))
3782 /* Can't use direct output if highlighting a region. */
3783 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
3786 /* Can't use direct output if highlighting trailing whitespace. */
3787 if (!NILP (Vshow_trailing_whitespace
))
3790 /* Give up if we are showing a message or just cleared the message
3791 because we might need to resize the echo area window. */
3792 if (!NILP (echo_area_buffer
[0]) || !NILP (echo_area_buffer
[1]))
3795 /* Give up if currently displaying a message instead of the
3796 minibuffer contents. */
3797 if (XWINDOW (minibuf_window
) == w
3798 && EQ (minibuf_window
, echo_area_window
))
3801 /* Give up if we don't know where the cursor is. */
3802 if (w
->cursor
.vpos
< 0)
3805 row
= MATRIX_ROW (w
->current_matrix
, w
->cursor
.vpos
);
3807 /* Give up if PT is outside of the last known cursor row. */
3808 if (PT
<= MATRIX_ROW_START_CHARPOS (row
)
3809 || PT
>= MATRIX_ROW_END_CHARPOS (row
))
3812 set_cursor_from_row (w
, row
, w
->current_matrix
, 0, 0, 0, 0);
3814 w
->last_cursor
= w
->cursor
;
3815 XSETFASTINT (w
->last_point
, PT
);
3817 xassert (w
->cursor
.hpos
>= 0
3818 && w
->cursor
.hpos
< w
->desired_matrix
->matrix_w
);
3820 if (FRAME_WINDOW_P (f
))
3821 FRAME_RIF (f
)->cursor_to (w
->cursor
.vpos
, w
->cursor
.hpos
,
3822 w
->cursor
.y
, w
->cursor
.x
);
3826 x
= (WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
)
3827 + (INTEGERP (w
->left_margin_cols
)
3828 ? XFASTINT (w
->left_margin_cols
)
3830 y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
3831 cursor_to (f
, y
, x
);
3834 if (FRAME_TERMCAP_P (f
))
3835 fflush (FRAME_TTY (f
)->output
);
3836 redisplay_performed_directly_p
= 1;
3842 /***********************************************************************
3844 ***********************************************************************/
3846 /* Update frame F based on the data in desired matrices.
3848 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3849 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3852 Value is non-zero if redisplay was stopped due to pending input. */
3855 update_frame (f
, force_p
, inhibit_hairy_id_p
)
3858 int inhibit_hairy_id_p
;
3860 /* 1 means display has been paused because of pending input. */
3862 struct window
*root_window
= XWINDOW (f
->root_window
);
3864 if (redisplay_dont_pause
)
3866 #if PERIODIC_PREEMPTION_CHECKING
3867 else if (NILP (Vredisplay_preemption_period
))
3869 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3872 double p
= XFLOATINT (Vredisplay_preemption_period
);
3875 if (detect_input_pending_ignore_squeezables ())
3882 usec
= (p
- sec
) * 1000000;
3884 EMACS_GET_TIME (tm
);
3885 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3886 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3890 if (FRAME_WINDOW_P (f
))
3892 /* We are working on window matrix basis. All windows whose
3893 flag must_be_updated_p is set have to be updated. */
3895 /* Record that we are not working on frame matrices. */
3896 set_frame_matrix_frame (NULL
);
3898 /* Update all windows in the window tree of F, maybe stopping
3899 when pending input is detected. */
3902 /* Update the menu bar on X frames that don't have toolkit
3904 if (WINDOWP (f
->menu_bar_window
))
3905 update_window (XWINDOW (f
->menu_bar_window
), 1);
3907 /* Update the tool-bar window, if present. */
3908 if (WINDOWP (f
->tool_bar_window
))
3910 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3912 /* Update tool-bar window. */
3913 if (w
->must_be_updated_p
)
3917 update_window (w
, 1);
3918 w
->must_be_updated_p
= 0;
3920 /* Swap tool-bar strings. We swap because we want to
3922 tem
= f
->current_tool_bar_string
;
3923 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3924 f
->desired_tool_bar_string
= tem
;
3929 /* Update windows. */
3930 paused_p
= update_window_tree (root_window
, force_p
);
3933 /* This flush is a performance bottleneck under X,
3934 and it doesn't seem to be necessary anyway (in general).
3935 It is necessary when resizing the window with the mouse, or
3936 at least the fringes are not redrawn in a timely manner. ++kfs */
3937 if (f
->force_flush_display_p
)
3939 FRAME_RIF (f
)->flush_display (f
);
3940 f
->force_flush_display_p
= 0;
3945 /* We are working on frame matrix basis. Set the frame on whose
3946 frame matrix we operate. */
3947 set_frame_matrix_frame (f
);
3949 /* Build F's desired matrix from window matrices. */
3950 build_frame_matrix (f
);
3952 /* Update the display */
3954 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3957 if (FRAME_TERMCAP_P (f
))
3959 if (FRAME_TTY (f
)->termscript
)
3960 fflush (FRAME_TTY (f
)->termscript
);
3961 fflush (FRAME_TTY (f
)->output
);
3964 /* Check window matrices for lost pointers. */
3966 check_window_matrix_pointers (root_window
);
3967 add_frame_display_history (f
, paused_p
);
3972 /* Reset flags indicating that a window should be updated. */
3973 set_window_update_flags (root_window
, 0);
3975 display_completed
= !paused_p
;
3981 /************************************************************************
3982 Window-based updates
3983 ************************************************************************/
3985 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3986 don't stop updating when input is pending. */
3989 update_window_tree (w
, force_p
)
3995 while (w
&& !paused_p
)
3997 if (!NILP (w
->hchild
))
3998 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3999 else if (!NILP (w
->vchild
))
4000 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
4001 else if (w
->must_be_updated_p
)
4002 paused_p
|= update_window (w
, force_p
);
4004 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4011 /* Update window W if its flag must_be_updated_p is non-zero. If
4012 FORCE_P is non-zero, don't stop updating if input is pending. */
4015 update_single_window (w
, force_p
)
4019 if (w
->must_be_updated_p
)
4021 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4023 /* Record that this is not a frame-based redisplay. */
4024 set_frame_matrix_frame (NULL
);
4026 if (redisplay_dont_pause
)
4028 #if PERIODIC_PREEMPTION_CHECKING
4029 else if (NILP (Vredisplay_preemption_period
))
4031 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
4034 double p
= XFLOATINT (Vredisplay_preemption_period
);
4038 usec
= (p
- sec
) * 1000000;
4040 EMACS_GET_TIME (tm
);
4041 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
4042 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4048 update_window (w
, force_p
);
4051 /* Reset flag in W. */
4052 w
->must_be_updated_p
= 0;
4056 #ifdef HAVE_WINDOW_SYSTEM
4058 /* Redraw lines from the current matrix of window W that are
4059 overlapped by other rows. YB is bottom-most y-position in W. */
4062 redraw_overlapped_rows (w
, yb
)
4067 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
4069 /* If rows overlapping others have been changed, the rows being
4070 overlapped have to be redrawn. This won't draw lines that have
4071 already been drawn in update_window_line because overlapped_p in
4072 desired rows is 0, so after row assignment overlapped_p in
4073 current rows is 0. */
4074 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4076 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
4078 if (!row
->enabled_p
)
4080 else if (row
->mode_line_p
)
4083 if (row
->overlapped_p
)
4085 enum glyph_row_area area
;
4087 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
4090 updated_area
= area
;
4091 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
4092 area
== TEXT_AREA
? row
->x
: 0);
4093 if (row
->used
[area
])
4094 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
4096 FRAME_RIF (f
)->clear_end_of_line (-1);
4099 row
->overlapped_p
= 0;
4102 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4108 /* Redraw lines from the current matrix of window W that overlap
4109 others. YB is bottom-most y-position in W. */
4112 redraw_overlapping_rows (w
, yb
)
4117 struct glyph_row
*row
;
4118 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4120 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
4122 row
= w
->current_matrix
->rows
+ i
;
4124 if (!row
->enabled_p
)
4126 else if (row
->mode_line_p
)
4129 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
4131 if (row
->overlapping_p
&& i
> 0 && bottom_y
< yb
)
4135 if (MATRIX_ROW_OVERLAPS_PRED_P (row
)
4136 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
4137 overlaps
|= OVERLAPS_PRED
;
4138 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
)
4139 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
4140 overlaps
|= OVERLAPS_SUCC
;
4144 if (row
->used
[LEFT_MARGIN_AREA
])
4145 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
4147 if (row
->used
[TEXT_AREA
])
4148 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
4150 if (row
->used
[RIGHT_MARGIN_AREA
])
4151 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
4153 /* Record in neighbour rows that ROW overwrites part of
4155 if (overlaps
& OVERLAPS_PRED
)
4156 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
4157 if (overlaps
& OVERLAPS_SUCC
)
4158 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
4167 #endif /* HAVE_WINDOW_SYSTEM */
4172 /* Check that no row in the current matrix of window W is enabled
4173 which is below what's displayed in the window. */
4176 check_current_matrix_flags (w
)
4179 int last_seen_p
= 0;
4180 int i
, yb
= window_text_bottom_y (w
);
4182 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
4184 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
4185 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4187 else if (last_seen_p
&& row
->enabled_p
)
4192 #endif /* GLYPH_DEBUG */
4195 /* Update display of window W. FORCE_P non-zero means that we should
4196 not stop when detecting pending input. */
4199 update_window (w
, force_p
)
4203 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4205 #if !PERIODIC_PREEMPTION_CHECKING
4206 int preempt_count
= baud_rate
/ 2400 + 1;
4208 extern int input_pending
;
4209 extern Lisp_Object do_mouse_tracking
;
4210 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4212 /* Check that W's frame doesn't have glyph matrices. */
4213 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
4216 /* Check pending input the first time so that we can quickly return. */
4217 #if !PERIODIC_PREEMPTION_CHECKING
4219 detect_input_pending_ignore_squeezables ();
4222 /* If forced to complete the update, or if no input is pending, do
4224 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
4226 struct glyph_row
*row
, *end
;
4227 struct glyph_row
*mode_line_row
;
4228 struct glyph_row
*header_line_row
;
4229 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
4231 rif
->update_window_begin_hook (w
);
4232 yb
= window_text_bottom_y (w
);
4234 /* If window has a header line, update it before everything else.
4235 Adjust y-positions of other rows by the header line height. */
4236 row
= desired_matrix
->rows
;
4237 end
= row
+ desired_matrix
->nrows
- 1;
4239 if (row
->mode_line_p
)
4241 header_line_row
= row
;
4245 header_line_row
= NULL
;
4247 /* Update the mode line, if necessary. */
4248 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
4249 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
4251 mode_line_row
->y
= yb
;
4252 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
4254 &mouse_face_overwritten_p
);
4257 /* Find first enabled row. Optimizations in redisplay_internal
4258 may lead to an update with only one row enabled. There may
4259 be also completely empty matrices. */
4260 while (row
< end
&& !row
->enabled_p
)
4263 /* Try reusing part of the display by copying. */
4264 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
4266 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
4269 /* All rows were found to be equal. */
4275 /* We've scrolled the display. */
4281 /* Update the rest of the lines. */
4282 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
4285 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
4288 /* We'll have to play a little bit with when to
4289 detect_input_pending. If it's done too often,
4290 scrolling large windows with repeated scroll-up
4291 commands will too quickly pause redisplay. */
4292 #if PERIODIC_PREEMPTION_CHECKING
4296 EMACS_GET_TIME (tm
);
4297 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4298 if (EMACS_TIME_NEG_P (dif
))
4300 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4301 if (detect_input_pending_ignore_squeezables ())
4306 if (!force_p
&& ++n_updated
% preempt_count
== 0)
4307 detect_input_pending_ignore_squeezables ();
4309 changed_p
|= update_window_line (w
, vpos
,
4310 &mouse_face_overwritten_p
);
4312 /* Mark all rows below the last visible one in the current
4313 matrix as invalid. This is necessary because of
4314 variable line heights. Consider the case of three
4315 successive redisplays, where the first displays 5
4316 lines, the second 3 lines, and the third 5 lines again.
4317 If the second redisplay wouldn't mark rows in the
4318 current matrix invalid, the third redisplay might be
4319 tempted to optimize redisplay based on lines displayed
4320 in the first redisplay. */
4321 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
4322 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
4323 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
4326 /* Was display preempted? */
4327 paused_p
= row
< end
;
4331 /* Update the header line after scrolling because a new header
4332 line would otherwise overwrite lines at the top of the window
4333 that can be scrolled. */
4334 if (header_line_row
&& header_line_row
->enabled_p
)
4336 header_line_row
->y
= 0;
4337 update_window_line (w
, 0, &mouse_face_overwritten_p
);
4340 /* Fix the appearance of overlapping/overlapped rows. */
4341 if (!paused_p
&& !w
->pseudo_window_p
)
4343 #ifdef HAVE_WINDOW_SYSTEM
4344 if (changed_p
&& rif
->fix_overlapping_area
)
4346 redraw_overlapped_rows (w
, yb
);
4347 redraw_overlapping_rows (w
, yb
);
4351 /* Make cursor visible at cursor position of W. */
4352 set_window_cursor_after_update (w
);
4354 #if 0 /* Check that current matrix invariants are satisfied. This is
4355 for debugging only. See the comment of check_matrix_invariants. */
4356 IF_DEBUG (check_matrix_invariants (w
));
4361 /* Remember the redisplay method used to display the matrix. */
4362 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
4365 #ifdef HAVE_WINDOW_SYSTEM
4366 update_window_fringes (w
, 0);
4369 /* End the update of window W. Don't set the cursor if we
4370 paused updating the display because in this case,
4371 set_window_cursor_after_update hasn't been called, and
4372 output_cursor doesn't contain the cursor location. */
4373 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
4379 /* check_current_matrix_flags (w); */
4380 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
4383 clear_glyph_matrix (desired_matrix
);
4389 /* Update the display of area AREA in window W, row number VPOS.
4390 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
4393 update_marginal_area (w
, area
, vpos
)
4397 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4398 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4400 /* Let functions in xterm.c know what area subsequent X positions
4401 will be relative to. */
4402 updated_area
= area
;
4404 /* Set cursor to start of glyphs, write them, and clear to the end
4405 of the area. I don't think that something more sophisticated is
4406 necessary here, since marginal areas will not be the default. */
4407 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
4408 if (desired_row
->used
[area
])
4409 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
4410 rif
->clear_end_of_line (-1);
4414 /* Update the display of the text area of row VPOS in window W.
4415 Value is non-zero if display has changed. */
4418 update_text_area (w
, vpos
)
4422 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4423 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4424 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4427 /* Let functions in xterm.c know what area subsequent X positions
4428 will be relative to. */
4429 updated_area
= TEXT_AREA
;
4431 /* If rows are at different X or Y, or rows have different height,
4432 or the current row is marked invalid, write the entire line. */
4433 if (!current_row
->enabled_p
4434 || desired_row
->y
!= current_row
->y
4435 || desired_row
->ascent
!= current_row
->ascent
4436 || desired_row
->phys_ascent
!= current_row
->phys_ascent
4437 || desired_row
->phys_height
!= current_row
->phys_height
4438 || desired_row
->visible_height
!= current_row
->visible_height
4439 || current_row
->overlapped_p
4440 /* This next line is necessary for correctly redrawing
4441 mouse-face areas after scrolling and other operations.
4442 However, it causes excessive flickering when mouse is moved
4443 across the mode line. Luckily, turning it off for the mode
4444 line doesn't seem to hurt anything. -- cyd.
4445 But it is still needed for the header line. -- kfs. */
4446 || (current_row
->mouse_face_p
4447 && !(current_row
->mode_line_p
&& vpos
> 0))
4448 || current_row
->x
!= desired_row
->x
)
4450 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
4452 if (desired_row
->used
[TEXT_AREA
])
4453 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
4454 desired_row
->used
[TEXT_AREA
]);
4456 /* Clear to end of window. */
4457 rif
->clear_end_of_line (-1);
4460 /* This erases the cursor. We do this here because
4461 notice_overwritten_cursor cannot easily check this, which
4462 might indicate that the whole functionality of
4463 notice_overwritten_cursor would better be implemented here.
4464 On the other hand, we need notice_overwritten_cursor as long
4465 as mouse highlighting is done asynchronously outside of
4467 if (vpos
== w
->phys_cursor
.vpos
)
4468 w
->phys_cursor_on_p
= 0;
4473 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
4474 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
4475 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
4476 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
4478 /* If the desired row extends its face to the text area end, and
4479 unless the current row also does so at the same position,
4480 make sure we write at least one glyph, so that the face
4481 extension actually takes place. */
4482 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
4483 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
4484 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
4485 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
4488 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
4492 /* Loop over glyphs that current and desired row may have
4498 /* Skip over glyphs that both rows have in common. These
4499 don't have to be written. We can't skip if the last
4500 current glyph overlaps the glyph to its right. For
4501 example, consider a current row of `if ' with the `f' in
4502 Courier bold so that it overlaps the ` ' to its right.
4503 If the desired row is ` ', we would skip over the space
4504 after the `if' and there would remain a pixel from the
4505 `f' on the screen. */
4506 if (overlapping_glyphs_p
&& i
> 0)
4508 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
4511 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
4513 can_skip_p
= right
== 0;
4519 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4521 x
+= desired_glyph
->pixel_width
;
4522 ++desired_glyph
, ++current_glyph
, ++i
;
4525 /* Consider the case that the current row contains "xxx
4526 ppp ggg" in italic Courier font, and the desired row
4527 is "xxx ggg". The character `p' has lbearing, `g'
4528 has not. The loop above will stop in front of the
4529 first `p' in the current row. If we would start
4530 writing glyphs there, we wouldn't erase the lbearing
4531 of the `p'. The rest of the lbearing problem is then
4532 taken care of by draw_glyphs. */
4533 if (overlapping_glyphs_p
4535 && i
< current_row
->used
[TEXT_AREA
]
4536 && (current_row
->used
[TEXT_AREA
]
4537 != desired_row
->used
[TEXT_AREA
]))
4541 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4543 while (left
> 0 && i
> 0)
4545 --i
, --desired_glyph
, --current_glyph
;
4546 x
-= desired_glyph
->pixel_width
;
4547 left
-= desired_glyph
->pixel_width
;
4552 /* Try to avoid writing the entire rest of the desired row
4553 by looking for a resync point. This mainly prevents
4554 mode line flickering in the case the mode line is in
4555 fixed-pitch font, which it usually will be. */
4556 if (i
< desired_row
->used
[TEXT_AREA
])
4558 int start_x
= x
, start_hpos
= i
;
4559 struct glyph
*start
= desired_glyph
;
4561 int skip_first_p
= !can_skip_p
;
4563 /* Find the next glyph that's equal again. */
4566 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4569 x
+= desired_glyph
->pixel_width
;
4570 current_x
+= current_glyph
->pixel_width
;
4571 ++desired_glyph
, ++current_glyph
, ++i
;
4575 if (i
== start_hpos
|| x
!= current_x
)
4579 desired_glyph
= start
;
4583 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4584 rif
->write_glyphs (start
, i
- start_hpos
);
4589 /* Write the rest. */
4590 if (i
< desired_row
->used
[TEXT_AREA
])
4592 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4593 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4597 /* Maybe clear to end of line. */
4598 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4600 /* If new row extends to the end of the text area, nothing
4601 has to be cleared, if and only if we did a write_glyphs
4602 above. This is made sure by setting desired_stop_pos
4603 appropriately above. */
4604 xassert (i
< desired_row
->used
[TEXT_AREA
]
4605 || ((desired_row
->used
[TEXT_AREA
]
4606 == current_row
->used
[TEXT_AREA
])
4607 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4609 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4611 /* If old row extends to the end of the text area, clear. */
4612 if (i
>= desired_row
->used
[TEXT_AREA
])
4613 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4614 desired_row
->pixel_width
);
4615 rif
->clear_end_of_line (-1);
4618 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4620 /* Otherwise clear to the end of the old row. Everything
4621 after that position should be clear already. */
4624 if (i
>= desired_row
->used
[TEXT_AREA
])
4625 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4626 desired_row
->pixel_width
);
4628 /* If cursor is displayed at the end of the line, make sure
4629 it's cleared. Nowadays we don't have a phys_cursor_glyph
4630 with which to erase the cursor (because this method
4631 doesn't work with lbearing/rbearing), so we must do it
4633 if (vpos
== w
->phys_cursor
.vpos
4634 && w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])
4636 w
->phys_cursor_on_p
= 0;
4640 x
= current_row
->pixel_width
;
4641 rif
->clear_end_of_line (x
);
4650 /* Update row VPOS in window W. Value is non-zero if display has been
4654 update_window_line (w
, vpos
, mouse_face_overwritten_p
)
4656 int vpos
, *mouse_face_overwritten_p
;
4658 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4659 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4660 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4663 /* Set the row being updated. This is important to let xterm.c
4664 know what line height values are in effect. */
4665 updated_row
= desired_row
;
4667 /* A row can be completely invisible in case a desired matrix was
4668 built with a vscroll and then make_cursor_line_fully_visible shifts
4669 the matrix. Make sure to make such rows current anyway, since
4670 we need the correct y-position, for example, in the current matrix. */
4671 if (desired_row
->mode_line_p
4672 || desired_row
->visible_height
> 0)
4674 xassert (desired_row
->enabled_p
);
4676 /* Update display of the left margin area, if there is one. */
4677 if (!desired_row
->full_width_p
4678 && !NILP (w
->left_margin_cols
))
4681 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4684 /* Update the display of the text area. */
4685 if (update_text_area (w
, vpos
))
4688 if (current_row
->mouse_face_p
)
4689 *mouse_face_overwritten_p
= 1;
4692 /* Update display of the right margin area, if there is one. */
4693 if (!desired_row
->full_width_p
4694 && !NILP (w
->right_margin_cols
))
4697 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4700 /* Draw truncation marks etc. */
4701 if (!current_row
->enabled_p
4702 || desired_row
->y
!= current_row
->y
4703 || desired_row
->visible_height
!= current_row
->visible_height
4704 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4705 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4706 || current_row
->redraw_fringe_bitmaps_p
4707 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4708 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4709 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4710 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4711 rif
->after_update_window_line_hook (desired_row
);
4714 /* Update current_row from desired_row. */
4715 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4721 /* Set the cursor after an update of window W. This function may only
4722 be called from update_window. */
4725 set_window_cursor_after_update (w
)
4728 struct frame
*f
= XFRAME (w
->frame
);
4729 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4730 int cx
, cy
, vpos
, hpos
;
4732 /* Not intended for frame matrix updates. */
4733 xassert (FRAME_WINDOW_P (f
));
4735 if (cursor_in_echo_area
4736 && !NILP (echo_area_buffer
[0])
4737 /* If we are showing a message instead of the mini-buffer,
4738 show the cursor for the message instead. */
4739 && XWINDOW (minibuf_window
) == w
4740 && EQ (minibuf_window
, echo_area_window
)
4741 /* These cases apply only to the frame that contains
4742 the active mini-buffer window. */
4743 && FRAME_HAS_MINIBUF_P (f
)
4744 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4746 cx
= cy
= vpos
= hpos
= 0;
4748 if (cursor_in_echo_area
>= 0)
4750 /* If the mini-buffer is several lines high, find the last
4751 line that has any text on it. Note: either all lines
4752 are enabled or none. Otherwise we wouldn't be able to
4754 struct glyph_row
*row
, *last_row
;
4755 struct glyph
*glyph
;
4756 int yb
= window_text_bottom_y (w
);
4759 row
= w
->current_matrix
->rows
;
4760 while (row
->enabled_p
4761 && (last_row
== NULL
4762 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4764 if (row
->used
[TEXT_AREA
]
4765 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4772 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4773 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4775 while (last
> start
&& last
->charpos
< 0)
4778 for (glyph
= start
; glyph
< last
; ++glyph
)
4780 cx
+= glyph
->pixel_width
;
4785 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4793 hpos
= w
->cursor
.hpos
;
4794 vpos
= w
->cursor
.vpos
;
4797 /* Window cursor can be out of sync for horizontally split windows. */
4798 hpos
= max (0, hpos
);
4799 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4800 vpos
= max (0, vpos
);
4801 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4802 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4806 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4807 tree rooted at W. */
4810 set_window_update_flags (w
, on_p
)
4816 if (!NILP (w
->hchild
))
4817 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4818 else if (!NILP (w
->vchild
))
4819 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4821 w
->must_be_updated_p
= on_p
;
4823 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4829 /***********************************************************************
4830 Window-Based Scrolling
4831 ***********************************************************************/
4833 /* Structure describing rows in scrolling_window. */
4837 /* Number of occurrences of this row in desired and current matrix. */
4838 int old_uses
, new_uses
;
4840 /* Vpos of row in new matrix. */
4841 int new_line_number
;
4843 /* Bucket index of this row_entry in the hash table row_table. */
4846 /* The row described by this entry. */
4847 struct glyph_row
*row
;
4849 /* Hash collision chain. */
4850 struct row_entry
*next
;
4853 /* A pool to allocate row_entry structures from, and the size of the
4854 pool. The pool is reallocated in scrolling_window when we find
4855 that we need a larger one. */
4857 static struct row_entry
*row_entry_pool
;
4858 static int row_entry_pool_size
;
4860 /* Index of next free entry in row_entry_pool. */
4862 static int row_entry_idx
;
4864 /* The hash table used during scrolling, and the table's size. This
4865 table is used to quickly identify equal rows in the desired and
4868 static struct row_entry
**row_table
;
4869 static int row_table_size
;
4871 /* Vectors of pointers to row_entry structures belonging to the
4872 current and desired matrix, and the size of the vectors. */
4874 static struct row_entry
**old_lines
, **new_lines
;
4875 static int old_lines_size
, new_lines_size
;
4877 /* A pool to allocate run structures from, and its size. */
4879 static struct run
*run_pool
;
4880 static int runs_size
;
4882 /* A vector of runs of lines found during scrolling. */
4884 static struct run
**runs
;
4886 /* Add glyph row ROW to the scrolling hash table during the scrolling
4889 static INLINE
struct row_entry
*
4890 add_row_entry (w
, row
)
4892 struct glyph_row
*row
;
4894 struct row_entry
*entry
;
4895 int i
= row
->hash
% row_table_size
;
4897 entry
= row_table
[i
];
4898 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4899 entry
= entry
->next
;
4903 entry
= row_entry_pool
+ row_entry_idx
++;
4905 entry
->old_uses
= entry
->new_uses
= 0;
4906 entry
->new_line_number
= 0;
4908 entry
->next
= row_table
[i
];
4909 row_table
[i
] = entry
;
4916 /* Try to reuse part of the current display of W by scrolling lines.
4917 HEADER_LINE_P non-zero means W has a header line.
4919 The algorithm is taken from Communications of the ACM, Apr78 "A
4920 Technique for Isolating Differences Between Files." It should take
4923 A short outline of the steps of the algorithm
4925 1. Skip lines equal at the start and end of both matrices.
4927 2. Enter rows in the current and desired matrix into a symbol
4928 table, counting how often they appear in both matrices.
4930 3. Rows that appear exactly once in both matrices serve as anchors,
4931 i.e. we assume that such lines are likely to have been moved.
4933 4. Starting from anchor lines, extend regions to be scrolled both
4934 forward and backward.
4938 -1 if all rows were found to be equal.
4939 0 to indicate that we did not scroll the display, or
4940 1 if we did scroll. */
4943 scrolling_window (w
, header_line_p
)
4947 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4948 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4949 int yb
= window_text_bottom_y (w
);
4950 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4951 int nruns
, nbytes
, n
, run_idx
;
4952 struct row_entry
*entry
;
4953 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4955 /* Skip over rows equal at the start. */
4956 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4958 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4959 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4963 && !d
->redraw_fringe_bitmaps_p
4965 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4966 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4967 && row_equal_p (w
, c
, d
, 1))
4976 /* Give up if some rows in the desired matrix are not enabled. */
4977 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4980 first_old
= first_new
= i
;
4982 /* Set last_new to the index + 1 of the last enabled row in the
4985 while (i
< desired_matrix
->nrows
- 1
4986 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4987 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4990 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4995 /* Set last_old to the index + 1 of the last enabled row in the
4996 current matrix. We don't look at the enabled flag here because
4997 we plan to reuse part of the display even if other parts are
5000 while (i
< current_matrix
->nrows
- 1)
5002 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
5011 /* Skip over rows equal at the bottom. */
5014 while (i
- 1 > first_new
5015 && j
- 1 > first_old
5016 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
5017 && (MATRIX_ROW (current_matrix
, i
- 1)->y
5018 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
5019 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
5021 MATRIX_ROW (desired_matrix
, i
- 1),
5022 MATRIX_ROW (current_matrix
, j
- 1), 1))
5027 /* Nothing to do if all rows are equal. */
5028 if (last_new
== first_new
)
5031 /* Reallocate vectors, tables etc. if necessary. */
5033 if (current_matrix
->nrows
> old_lines_size
)
5035 old_lines_size
= current_matrix
->nrows
;
5036 nbytes
= old_lines_size
* sizeof *old_lines
;
5037 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
5040 if (desired_matrix
->nrows
> new_lines_size
)
5042 new_lines_size
= desired_matrix
->nrows
;
5043 nbytes
= new_lines_size
* sizeof *new_lines
;
5044 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
5047 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
5048 if (3 * n
> row_table_size
)
5050 row_table_size
= next_almost_prime (3 * n
);
5051 nbytes
= row_table_size
* sizeof *row_table
;
5052 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
5053 bzero (row_table
, nbytes
);
5056 if (n
> row_entry_pool_size
)
5058 row_entry_pool_size
= n
;
5059 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
5060 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
5063 if (desired_matrix
->nrows
> runs_size
)
5065 runs_size
= desired_matrix
->nrows
;
5066 nbytes
= runs_size
* sizeof *runs
;
5067 runs
= (struct run
**) xrealloc (runs
, nbytes
);
5068 nbytes
= runs_size
* sizeof *run_pool
;
5069 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
5072 nruns
= run_idx
= 0;
5075 /* Add rows from the current and desired matrix to the hash table
5076 row_hash_table to be able to find equal ones quickly. */
5078 for (i
= first_old
; i
< last_old
; ++i
)
5080 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
5082 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
5083 old_lines
[i
] = entry
;
5087 old_lines
[i
] = NULL
;
5090 for (i
= first_new
; i
< last_new
; ++i
)
5092 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
5093 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
5095 entry
->new_line_number
= i
;
5096 new_lines
[i
] = entry
;
5099 /* Identify moves based on lines that are unique and equal
5100 in both matrices. */
5101 for (i
= first_old
; i
< last_old
;)
5103 && old_lines
[i
]->old_uses
== 1
5104 && old_lines
[i
]->new_uses
== 1)
5107 int new_line
= old_lines
[i
]->new_line_number
;
5108 struct run
*run
= run_pool
+ run_idx
++;
5111 run
->current_vpos
= i
;
5112 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
5113 run
->desired_vpos
= new_line
;
5114 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
5116 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
5118 /* Extend backward. */
5121 while (j
> first_old
5123 && old_lines
[j
] == new_lines
[k
])
5125 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5126 --run
->current_vpos
;
5127 --run
->desired_vpos
;
5130 run
->desired_y
-= h
;
5131 run
->current_y
-= h
;
5135 /* Extend forward. */
5140 && old_lines
[j
] == new_lines
[k
])
5142 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
5148 /* Insert run into list of all runs. Order runs by copied
5149 pixel lines. Note that we record runs that don't have to
5150 be copied because they are already in place. This is done
5151 because we can avoid calling update_window_line in this
5153 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
5155 for (k
= nruns
; k
> j
; --k
)
5156 runs
[k
] = runs
[k
- 1];
5165 /* Do the moves. Do it in a way that we don't overwrite something
5166 we want to copy later on. This is not solvable in general
5167 because there is only one display and we don't have a way to
5168 exchange areas on this display. Example:
5170 +-----------+ +-----------+
5172 +-----------+ --> +-----------+
5174 +-----------+ +-----------+
5176 Instead, prefer bigger moves, and invalidate moves that would
5177 copy from where we copied to. */
5179 for (i
= 0; i
< nruns
; ++i
)
5180 if (runs
[i
]->nrows
> 0)
5182 struct run
*r
= runs
[i
];
5184 /* Copy on the display. */
5185 if (r
->current_y
!= r
->desired_y
)
5187 rif
->scroll_run_hook (w
, r
);
5189 /* Invalidate runs that copy from where we copied to. */
5190 for (j
= i
+ 1; j
< nruns
; ++j
)
5192 struct run
*p
= runs
[j
];
5194 if ((p
->current_y
>= r
->desired_y
5195 && p
->current_y
< r
->desired_y
+ r
->height
)
5196 || (p
->current_y
+ p
->height
>= r
->desired_y
5197 && (p
->current_y
+ p
->height
5198 < r
->desired_y
+ r
->height
)))
5203 /* Assign matrix rows. */
5204 for (j
= 0; j
< r
->nrows
; ++j
)
5206 struct glyph_row
*from
, *to
;
5207 int to_overlapped_p
;
5209 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
5210 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
5211 to_overlapped_p
= to
->overlapped_p
;
5212 if (!from
->mode_line_p
&& !w
->pseudo_window_p
5213 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
5214 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
5215 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
5216 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
5217 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
5218 from
->redraw_fringe_bitmaps_p
= 1;
5219 assign_row (to
, from
);
5220 to
->enabled_p
= 1, from
->enabled_p
= 0;
5221 to
->overlapped_p
= to_overlapped_p
;
5225 /* Clear the hash table, for the next time. */
5226 for (i
= 0; i
< row_entry_idx
; ++i
)
5227 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
5229 /* Value is > 0 to indicate that we scrolled the display. */
5235 /************************************************************************
5237 ************************************************************************/
5239 /* Update the desired frame matrix of frame F.
5241 FORCE_P non-zero means that the update should not be stopped by
5242 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
5243 should not be tried.
5245 Value is non-zero if update was stopped due to pending input. */
5248 update_frame_1 (f
, force_p
, inhibit_id_p
)
5253 /* Frame matrices to work on. */
5254 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5255 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5258 int preempt_count
= baud_rate
/ 2400 + 1;
5259 extern int input_pending
;
5261 xassert (current_matrix
&& desired_matrix
);
5263 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
5264 calculate_costs (f
);
5266 if (preempt_count
<= 0)
5269 #if !PERIODIC_PREEMPTION_CHECKING
5270 if (!force_p
&& detect_input_pending_ignore_squeezables ())
5277 /* If we cannot insert/delete lines, it's no use trying it. */
5278 if (!FRAME_LINE_INS_DEL_OK (f
))
5281 /* See if any of the desired lines are enabled; don't compute for
5282 i/d line if just want cursor motion. */
5283 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
5284 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5287 /* Try doing i/d line, if not yet inhibited. */
5288 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
5289 force_p
|= scrolling (f
);
5291 /* Update the individual lines as needed. Do bottom line first. */
5292 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
5293 update_frame_line (f
, desired_matrix
->nrows
- 1);
5295 /* Now update the rest of the lines. */
5296 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
5298 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5300 if (FRAME_TERMCAP_P (f
))
5302 /* Flush out every so many lines.
5303 Also flush out if likely to have more than 1k buffered
5304 otherwise. I'm told that some telnet connections get
5305 really screwed by more than 1k output at once. */
5306 FILE *display_output
= FRAME_TTY (f
)->output
;
5309 int outq
= PENDING_OUTPUT_COUNT (display_output
);
5311 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
5313 fflush (display_output
);
5314 if (preempt_count
== 1)
5316 #ifdef EMACS_OUTQSIZE
5317 if (EMACS_OUTQSIZE (0, &outq
) < 0)
5318 /* Probably not a tty. Ignore the error and reset
5320 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
5323 if (baud_rate
<= outq
&& baud_rate
> 0)
5324 sleep (outq
/ baud_rate
);
5330 #if PERIODIC_PREEMPTION_CHECKING
5334 EMACS_GET_TIME (tm
);
5335 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
5336 if (EMACS_TIME_NEG_P (dif
))
5338 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
5339 if (detect_input_pending_ignore_squeezables ())
5344 if (!force_p
&& (i
- 1) % preempt_count
== 0)
5345 detect_input_pending_ignore_squeezables ();
5348 update_frame_line (f
, i
);
5352 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
5354 /* Now just clean up termcap drivers and set cursor, etc. */
5357 if ((cursor_in_echo_area
5358 /* If we are showing a message instead of the mini-buffer,
5359 show the cursor for the message instead of for the
5360 (now hidden) mini-buffer contents. */
5361 || (EQ (minibuf_window
, selected_window
)
5362 && EQ (minibuf_window
, echo_area_window
)
5363 && !NILP (echo_area_buffer
[0])))
5364 /* These cases apply only to the frame that contains
5365 the active mini-buffer window. */
5366 && FRAME_HAS_MINIBUF_P (f
)
5367 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
5369 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
5372 if (cursor_in_echo_area
< 0)
5374 /* Negative value of cursor_in_echo_area means put
5375 cursor at beginning of line. */
5381 /* Positive value of cursor_in_echo_area means put
5382 cursor at the end of the prompt. If the mini-buffer
5383 is several lines high, find the last line that has
5385 row
= FRAME_LINES (f
);
5391 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
5393 /* Frame rows are filled up with spaces that
5394 must be ignored here. */
5395 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
5397 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
5398 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
5401 && (last
- 1)->charpos
< 0)
5407 while (row
> top
&& col
== 0);
5409 /* Make sure COL is not out of range. */
5410 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
5412 /* If we have another row, advance cursor into it. */
5413 if (row
< FRAME_LINES (f
) - 1)
5415 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
5418 /* Otherwise move it back in range. */
5420 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
5424 cursor_to (f
, row
, col
);
5428 /* We have only one cursor on terminal frames. Use it to
5429 display the cursor of the selected window. */
5430 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5431 if (w
->cursor
.vpos
>= 0
5432 /* The cursor vpos may be temporarily out of bounds
5433 in the following situation: There is one window,
5434 with the cursor in the lower half of it. The window
5435 is split, and a message causes a redisplay before
5436 a new cursor position has been computed. */
5437 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
5439 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
5440 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
5442 if (INTEGERP (w
->left_margin_cols
))
5443 x
+= XFASTINT (w
->left_margin_cols
);
5445 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
5446 cursor_to (f
, y
, x
);
5453 clear_desired_matrices (f
);
5458 /* Do line insertions/deletions on frame F for frame-based redisplay. */
5462 struct frame
*frame
;
5464 int unchanged_at_top
, unchanged_at_bottom
;
5467 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5468 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5469 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5470 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
5472 int free_at_end_vpos
= FRAME_LINES (frame
);
5473 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
5474 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
5476 if (!current_matrix
)
5479 /* Compute hash codes of all the lines. Also calculate number of
5480 changed lines, number of unchanged lines at the beginning, and
5481 number of unchanged lines at the end. */
5483 unchanged_at_top
= 0;
5484 unchanged_at_bottom
= FRAME_LINES (frame
);
5485 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
5487 /* Give up on this scrolling if some old lines are not enabled. */
5488 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
5490 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
5491 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
5493 /* This line cannot be redrawn, so don't let scrolling mess it. */
5494 new_hash
[i
] = old_hash
[i
];
5495 #define INFINITY 1000000 /* Taken from scroll.c */
5496 draw_cost
[i
] = INFINITY
;
5500 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
5501 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
5504 if (old_hash
[i
] != new_hash
[i
])
5507 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
5509 else if (i
== unchanged_at_top
)
5511 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
5514 /* If changed lines are few, don't allow preemption, don't scroll. */
5515 if ((!FRAME_SCROLL_REGION_OK (frame
)
5516 && changed_lines
< baud_rate
/ 2400)
5517 || unchanged_at_bottom
== FRAME_LINES (frame
))
5520 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
5521 - unchanged_at_bottom
);
5523 if (FRAME_SCROLL_REGION_OK (frame
))
5524 free_at_end_vpos
-= unchanged_at_bottom
;
5525 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
5526 free_at_end_vpos
= -1;
5528 /* If large window, fast terminal and few lines in common between
5529 current frame and desired frame, don't bother with i/d calc. */
5530 if (!FRAME_SCROLL_REGION_OK (frame
)
5531 && window_size
>= 18 && baud_rate
> 2400
5533 10 * scrolling_max_lines_saved (unchanged_at_top
,
5534 FRAME_LINES (frame
) - unchanged_at_bottom
,
5535 old_hash
, new_hash
, draw_cost
)))
5538 if (window_size
< 2)
5541 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5542 draw_cost
+ unchanged_at_top
- 1,
5543 old_draw_cost
+ unchanged_at_top
- 1,
5544 old_hash
+ unchanged_at_top
- 1,
5545 new_hash
+ unchanged_at_top
- 1,
5546 free_at_end_vpos
- unchanged_at_top
);
5552 /* Count the number of blanks at the start of the vector of glyphs R
5553 which is LEN glyphs long. */
5556 count_blanks (r
, len
)
5562 for (i
= 0; i
< len
; ++i
)
5563 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5570 /* Count the number of glyphs in common at the start of the glyph
5571 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5572 of STR2. Value is the number of equal glyphs equal at the start. */
5575 count_match (str1
, end1
, str2
, end2
)
5576 struct glyph
*str1
, *end1
, *str2
, *end2
;
5578 struct glyph
*p1
= str1
;
5579 struct glyph
*p2
= str2
;
5583 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5590 /* Char insertion/deletion cost vector, from term.c */
5592 extern int *char_ins_del_vector
;
5593 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5596 /* Perform a frame-based update on line VPOS in frame FRAME. */
5599 update_frame_line (f
, vpos
)
5603 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5605 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5606 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5607 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5608 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5609 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5610 int must_write_whole_line_p
;
5611 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5612 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5613 != FACE_TTY_DEFAULT_BG_COLOR
);
5615 if (colored_spaces_p
)
5618 /* Current row not enabled means it has unknown contents. We must
5619 write the whole desired line in that case. */
5620 must_write_whole_line_p
= !current_row
->enabled_p
;
5621 if (must_write_whole_line_p
)
5628 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5629 olen
= current_row
->used
[TEXT_AREA
];
5631 /* Ignore trailing spaces, if we can. */
5632 if (!write_spaces_p
)
5633 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5637 current_row
->enabled_p
= 1;
5638 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5640 /* If desired line is empty, just clear the line. */
5641 if (!desired_row
->enabled_p
)
5647 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5648 nlen
= desired_row
->used
[TEXT_AREA
];
5649 nend
= nbody
+ nlen
;
5651 /* If display line has unknown contents, write the whole line. */
5652 if (must_write_whole_line_p
)
5654 /* Ignore spaces at the end, if we can. */
5655 if (!write_spaces_p
)
5656 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5659 /* Write the contents of the desired line. */
5662 cursor_to (f
, vpos
, 0);
5663 write_glyphs (f
, nbody
, nlen
);
5666 /* Don't call clear_end_of_line if we already wrote the whole
5667 line. The cursor will not be at the right margin in that
5668 case but in the line below. */
5669 if (nlen
< FRAME_TOTAL_COLS (f
))
5671 cursor_to (f
, vpos
, nlen
);
5672 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5675 /* Make sure we are in the right row, otherwise cursor movement
5676 with cmgoto might use `ch' in the wrong row. */
5677 cursor_to (f
, vpos
, 0);
5679 make_current (desired_matrix
, current_matrix
, vpos
);
5683 /* Pretend trailing spaces are not there at all,
5684 unless for one reason or another we must write all spaces. */
5685 if (!write_spaces_p
)
5686 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5689 /* If there's no i/d char, quickly do the best we can without it. */
5690 if (!FRAME_CHAR_INS_DEL_OK (f
))
5694 /* Find the first glyph in desired row that doesn't agree with
5695 a glyph in the current row, and write the rest from there on. */
5696 for (i
= 0; i
< nlen
; i
++)
5698 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5700 /* Find the end of the run of different glyphs. */
5704 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5705 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5708 /* Output this run of non-matching chars. */
5709 cursor_to (f
, vpos
, i
);
5710 write_glyphs (f
, nbody
+ i
, j
- i
);
5713 /* Now find the next non-match. */
5717 /* Clear the rest of the line, or the non-clear part of it. */
5720 cursor_to (f
, vpos
, nlen
);
5721 clear_end_of_line (f
, olen
);
5724 /* Make current row = desired row. */
5725 make_current (desired_matrix
, current_matrix
, vpos
);
5729 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5730 characters in a row. */
5734 /* If current line is blank, skip over initial spaces, if
5735 possible, and write the rest. */
5739 nsp
= count_blanks (nbody
, nlen
);
5743 cursor_to (f
, vpos
, nsp
);
5744 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5747 /* Exchange contents between current_frame and new_frame. */
5748 make_current (desired_matrix
, current_matrix
, vpos
);
5752 /* Compute number of leading blanks in old and new contents. */
5753 osp
= count_blanks (obody
, olen
);
5754 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5756 /* Compute number of matching chars starting with first non-blank. */
5757 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5758 nbody
+ nsp
, nbody
+ nlen
);
5760 /* Spaces in new match implicit space past the end of old. */
5761 /* A bug causing this to be a no-op was fixed in 18.29. */
5762 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5765 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5769 /* Avoid doing insert/delete char
5770 just cause number of leading spaces differs
5771 when the following text does not match. */
5772 if (begmatch
== 0 && osp
!= nsp
)
5773 osp
= nsp
= min (osp
, nsp
);
5775 /* Find matching characters at end of line */
5778 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5780 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5785 endmatch
= obody
+ olen
- op1
;
5787 /* tem gets the distance to insert or delete.
5788 endmatch is how many characters we save by doing so.
5791 tem
= (nlen
- nsp
) - (olen
- osp
);
5793 && (!FRAME_CHAR_INS_DEL_OK (f
)
5794 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5797 /* nsp - osp is the distance to insert or delete.
5798 If that is nonzero, begmatch is known to be nonzero also.
5799 begmatch + endmatch is how much we save by doing the ins/del.
5803 && (!FRAME_CHAR_INS_DEL_OK (f
)
5804 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5808 osp
= nsp
= min (osp
, nsp
);
5811 /* Now go through the line, inserting, writing and
5812 deleting as appropriate. */
5816 cursor_to (f
, vpos
, nsp
);
5817 delete_glyphs (f
, osp
- nsp
);
5821 /* If going to delete chars later in line
5822 and insert earlier in the line,
5823 must delete first to avoid losing data in the insert */
5824 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5826 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5827 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5828 olen
= nlen
- (nsp
- osp
);
5830 cursor_to (f
, vpos
, osp
);
5831 insert_glyphs (f
, 0, nsp
- osp
);
5835 tem
= nsp
+ begmatch
+ endmatch
;
5836 if (nlen
!= tem
|| olen
!= tem
)
5838 if (!endmatch
|| nlen
== olen
)
5840 /* If new text being written reaches right margin, there is
5841 no need to do clear-to-eol at the end of this function
5842 (and it would not be safe, since cursor is not going to
5843 be "at the margin" after the text is done). */
5844 if (nlen
== FRAME_TOTAL_COLS (f
))
5847 /* Function write_glyphs is prepared to do nothing
5848 if passed a length <= 0. Check it here to avoid
5849 unnecessary cursor movement. */
5852 cursor_to (f
, vpos
, nsp
+ begmatch
);
5853 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5856 else if (nlen
> olen
)
5858 /* Here, we used to have the following simple code:
5859 ----------------------------------------
5860 write_glyphs (nbody + nsp + begmatch, olen - tem);
5861 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5862 ----------------------------------------
5863 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5864 is a padding glyph. */
5865 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5868 cursor_to (f
, vpos
, nsp
+ begmatch
);
5870 /* Calculate columns we can actually overwrite. */
5871 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5873 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5875 /* If we left columns to be overwritten, we must delete them. */
5876 del
= olen
- tem
- out
;
5878 delete_glyphs (f
, del
);
5880 /* At last, we insert columns not yet written out. */
5881 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5884 else if (olen
> nlen
)
5886 cursor_to (f
, vpos
, nsp
+ begmatch
);
5887 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5888 delete_glyphs (f
, olen
- nlen
);
5894 /* If any unerased characters remain after the new line, erase them. */
5897 cursor_to (f
, vpos
, nlen
);
5898 clear_end_of_line (f
, olen
);
5901 /* Exchange contents between current_frame and new_frame. */
5902 make_current (desired_matrix
, current_matrix
, vpos
);
5907 /***********************************************************************
5908 X/Y Position -> Buffer Position
5909 ***********************************************************************/
5911 /* Determine what's under window-relative pixel position (*X, *Y).
5912 Return the object (string or buffer) that's there.
5913 Return in *POS the position in that object.
5914 Adjust *X and *Y to character positions. */
5917 buffer_posn_from_coords (w
, x
, y
, pos
, object
, dx
, dy
, width
, height
)
5920 struct display_pos
*pos
;
5921 Lisp_Object
*object
;
5923 int *width
, *height
;
5926 struct buffer
*old_current_buffer
= current_buffer
;
5927 struct text_pos startp
;
5929 struct glyph_row
*row
;
5930 #ifdef HAVE_WINDOW_SYSTEM
5931 struct image
*img
= 0;
5935 current_buffer
= XBUFFER (w
->buffer
);
5936 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5937 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5938 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5939 start_display (&it
, w
, startp
);
5941 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5942 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5943 MOVE_TO_X
| MOVE_TO_Y
);
5945 current_buffer
= old_current_buffer
;
5947 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5948 *dy
= *y
- it
.current_y
;
5951 if (STRINGP (it
.string
))
5955 #ifdef HAVE_WINDOW_SYSTEM
5956 if (it
.what
== IT_IMAGE
)
5958 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5959 && !NILP (img
->spec
))
5960 *object
= img
->spec
;
5964 if (it
.vpos
< w
->current_matrix
->nrows
5965 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5968 if (it
.hpos
< row
->used
[TEXT_AREA
])
5970 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5971 #ifdef HAVE_WINDOW_SYSTEM
5974 *dy
-= row
->ascent
- glyph
->ascent
;
5975 *dx
+= glyph
->slice
.x
;
5976 *dy
+= glyph
->slice
.y
;
5977 /* Image slices positions are still relative to the entire image */
5978 *width
= img
->width
;
5979 *height
= img
->height
;
5984 *width
= glyph
->pixel_width
;
5985 *height
= glyph
->ascent
+ glyph
->descent
;
5991 *height
= row
->height
;
5996 *width
= *height
= 0;
5999 /* Add extra (default width) columns if clicked after EOL. */
6000 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
6002 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
6011 /* Value is the string under window-relative coordinates X/Y in the
6012 mode line or header line (PART says which) of window W, or nil if none.
6013 *CHARPOS is set to the position in the string returned. */
6016 mode_line_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6018 enum window_part part
;
6021 Lisp_Object
*object
;
6023 int *width
, *height
;
6025 struct glyph_row
*row
;
6026 struct glyph
*glyph
, *end
;
6028 Lisp_Object string
= Qnil
;
6030 if (part
== ON_MODE_LINE
)
6031 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
6033 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
6035 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6037 if (row
->mode_line_p
&& row
->enabled_p
)
6039 /* Find the glyph under X. If we find one with a string object,
6040 it's the one we were looking for. */
6041 glyph
= row
->glyphs
[TEXT_AREA
];
6042 end
= glyph
+ row
->used
[TEXT_AREA
];
6043 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6044 x0
-= glyph
->pixel_width
;
6045 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
6048 string
= glyph
->object
;
6049 *charpos
= glyph
->charpos
;
6050 *width
= glyph
->pixel_width
;
6051 *height
= glyph
->ascent
+ glyph
->descent
;
6052 #ifdef HAVE_WINDOW_SYSTEM
6053 if (glyph
->type
== IMAGE_GLYPH
)
6056 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6058 *object
= img
->spec
;
6059 y0
-= row
->ascent
- glyph
->ascent
;
6065 /* Add extra (default width) columns if clicked after EOL. */
6066 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6068 *height
= row
->height
;
6075 *width
= *height
= 0;
6085 /* Value is the string under window-relative coordinates X/Y in either
6086 marginal area, or nil if none. *CHARPOS is set to the position in
6087 the string returned. */
6090 marginal_area_string (w
, part
, x
, y
, charpos
, object
, dx
, dy
, width
, height
)
6092 enum window_part part
;
6095 Lisp_Object
*object
;
6097 int *width
, *height
;
6099 struct glyph_row
*row
= w
->current_matrix
->rows
;
6100 struct glyph
*glyph
, *end
;
6101 int x0
, y0
, i
, wy
= *y
;
6103 Lisp_Object string
= Qnil
;
6105 if (part
== ON_LEFT_MARGIN
)
6106 area
= LEFT_MARGIN_AREA
;
6107 else if (part
== ON_RIGHT_MARGIN
)
6108 area
= RIGHT_MARGIN_AREA
;
6112 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
6113 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
6116 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
6120 /* Find the glyph under X. If we find one with a string object,
6121 it's the one we were looking for. */
6122 if (area
== RIGHT_MARGIN_AREA
)
6123 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6124 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6125 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
6126 + window_box_width (w
, LEFT_MARGIN_AREA
)
6127 + window_box_width (w
, TEXT_AREA
));
6129 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
6130 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
6133 glyph
= row
->glyphs
[area
];
6134 end
= glyph
+ row
->used
[area
];
6135 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
6136 x0
-= glyph
->pixel_width
;
6137 *x
= glyph
- row
->glyphs
[area
];
6140 string
= glyph
->object
;
6141 *charpos
= glyph
->charpos
;
6142 *width
= glyph
->pixel_width
;
6143 *height
= glyph
->ascent
+ glyph
->descent
;
6144 #ifdef HAVE_WINDOW_SYSTEM
6145 if (glyph
->type
== IMAGE_GLYPH
)
6148 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
6150 *object
= img
->spec
;
6151 y0
-= row
->ascent
- glyph
->ascent
;
6152 x0
+= glyph
->slice
.x
;
6153 y0
+= glyph
->slice
.y
;
6159 /* Add extra (default width) columns if clicked after EOL. */
6160 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
6162 *height
= row
->height
;
6169 *width
= *height
= 0;
6179 /***********************************************************************
6180 Changing Frame Sizes
6181 ***********************************************************************/
6186 window_change_signal (signalnum
) /* If we don't have an argument, */
6187 int signalnum
; /* some compilers complain in signal calls. */
6193 int old_errno
= errno
;
6195 struct tty_display_info
*tty
;
6197 signal (SIGWINCH
, window_change_signal
);
6198 SIGNAL_THREAD_CHECK (signalnum
);
6200 /* The frame size change obviously applies to a single
6201 termcap-controlled terminal, but we can't decide which.
6202 Therefore, we resize the frames corresponding to each tty.
6204 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
6206 if (! tty
->term_initted
)
6209 get_tty_size (fileno (tty
->input
), &width
, &height
);
6211 if (width
> 5 && height
> 2) {
6212 Lisp_Object tail
, frame
;
6214 FOR_EACH_FRAME (tail
, frame
)
6215 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
6216 /* Record the new sizes, but don't reallocate the data
6217 structures now. Let that be done later outside of the
6219 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
6225 #endif /* SIGWINCH */
6228 /* Do any change in frame size that was requested by a signal. SAFE
6229 non-zero means this function is called from a place where it is
6230 safe to change frame sizes while a redisplay is in progress. */
6233 do_pending_window_change (safe
)
6236 /* If window_change_signal should have run before, run it now. */
6237 if (redisplaying_p
&& !safe
)
6240 while (delayed_size_change
)
6242 Lisp_Object tail
, frame
;
6244 delayed_size_change
= 0;
6246 FOR_EACH_FRAME (tail
, frame
)
6248 struct frame
*f
= XFRAME (frame
);
6250 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
6251 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
6258 /* Change the frame height and/or width. Values may be given as zero to
6259 indicate no change is to take place.
6261 If DELAY is non-zero, then assume we're being called from a signal
6262 handler, and queue the change for later - perhaps the next
6263 redisplay. Since this tries to resize windows, we can't call it
6264 from a signal handler.
6266 SAFE non-zero means this function is called from a place where it's
6267 safe to change frame sizes while a redisplay is in progress. */
6270 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6271 register struct frame
*f
;
6272 int newheight
, newwidth
, pretend
, delay
, safe
;
6274 Lisp_Object tail
, frame
;
6276 if (FRAME_MSDOS_P (f
))
6278 /* On MS-DOS, all frames use the same screen, so a change in
6279 size affects all frames. Termcap now supports multiple
6281 FOR_EACH_FRAME (tail
, frame
)
6282 if (! FRAME_WINDOW_P (XFRAME (frame
)))
6283 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
6284 pretend
, delay
, safe
);
6287 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
6291 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
)
6292 register struct frame
*f
;
6293 int newheight
, newwidth
, pretend
, delay
, safe
;
6295 int new_frame_total_cols
;
6296 int count
= SPECPDL_INDEX ();
6298 /* If we can't deal with the change now, queue it for later. */
6299 if (delay
|| (redisplaying_p
&& !safe
))
6301 f
->new_text_lines
= newheight
;
6302 f
->new_text_cols
= newwidth
;
6303 delayed_size_change
= 1;
6307 /* This size-change overrides any pending one for this frame. */
6308 f
->new_text_lines
= 0;
6309 f
->new_text_cols
= 0;
6311 /* If an argument is zero, set it to the current value. */
6313 newheight
= FRAME_LINES (f
);
6315 newwidth
= FRAME_COLS (f
);
6317 /* Compute width of windows in F.
6318 This is the width of the frame without vertical scroll bars. */
6319 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
6321 /* Round up to the smallest acceptable size. */
6322 check_frame_size (f
, &newheight
, &newwidth
);
6324 /* If we're not changing the frame size, quit now. */
6325 if (newheight
== FRAME_LINES (f
)
6326 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
))
6332 /* We only can set screen dimensions to certain values supported
6333 by our video hardware. Try to find the smallest size greater
6334 or equal to the requested dimensions. */
6335 dos_set_window_size (&newheight
, &newwidth
);
6338 if (newheight
!= FRAME_LINES (f
))
6340 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
6342 /* Frame has both root and mini-buffer. */
6343 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
6344 FRAME_TOP_MARGIN (f
));
6345 set_window_height (FRAME_ROOT_WINDOW (f
),
6348 - FRAME_TOP_MARGIN (f
)),
6350 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
6352 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
6355 /* Frame has just one top-level window. */
6356 set_window_height (FRAME_ROOT_WINDOW (f
),
6357 newheight
- FRAME_TOP_MARGIN (f
), 2);
6359 if (FRAME_TERMCAP_P (f
) && !pretend
)
6360 FrameRows (FRAME_TTY (f
)) = newheight
;
6363 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
6365 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
6366 if (FRAME_HAS_MINIBUF_P (f
))
6367 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
6369 if (FRAME_TERMCAP_P (f
) && !pretend
)
6370 FrameCols (FRAME_TTY (f
)) = newwidth
;
6372 if (WINDOWP (f
->tool_bar_window
))
6373 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
6376 FRAME_LINES (f
) = newheight
;
6377 SET_FRAME_COLS (f
, newwidth
);
6380 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
6381 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
6383 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
6385 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
6386 w
->cursor
.hpos
= w
->cursor
.x
= 0;
6387 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
6388 w
->cursor
.vpos
= w
->cursor
.y
= 0;
6392 calculate_costs (f
);
6393 SET_FRAME_GARBAGED (f
);
6398 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
6400 run_window_configuration_change_hook (f
);
6402 unbind_to (count
, Qnil
);
6407 /***********************************************************************
6408 Terminal Related Lisp Functions
6409 ***********************************************************************/
6411 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
6412 1, 1, "FOpen termscript file: ",
6413 doc
: /* Start writing all terminal output to FILE as well as the terminal.
6414 FILE = nil means just close any termscript file currently open. */)
6418 struct tty_display_info
*tty
;
6420 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
6421 error ("Current frame is not on a tty device");
6425 if (tty
->termscript
!= 0)
6428 fclose (tty
->termscript
);
6431 tty
->termscript
= 0;
6435 file
= Fexpand_file_name (file
, Qnil
);
6436 tty
->termscript
= fopen (SDATA (file
), "w");
6437 if (tty
->termscript
== 0)
6438 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
6444 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
6445 Ssend_string_to_terminal
, 1, 2, 0,
6446 doc
: /* Send STRING to the terminal without alteration.
6447 Control characters in STRING will have terminal-dependent effects.
6449 Optional parameter TERMINAL specifies the tty terminal device to use.
6450 It may be a terminal id, a frame, or nil for the terminal used by the
6451 currently selected frame. */)
6454 Lisp_Object terminal
;
6456 struct terminal
*t
= get_tty_terminal (terminal
, 1);
6457 struct tty_display_info
*tty
;
6459 /* ??? Perhaps we should do something special for multibyte strings here. */
6460 CHECK_STRING (string
);
6464 error ("Unknown terminal device");
6466 tty
= t
->display_info
.tty
;
6469 error ("Terminal is currently suspended");
6471 if (tty
->termscript
)
6473 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
6474 fflush (tty
->termscript
);
6476 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->output
);
6477 fflush (tty
->output
);
6483 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
6484 doc
: /* Beep, or flash the screen.
6485 Also, unless an argument is given,
6486 terminate any keyboard macro currently executing. */)
6495 ring_bell (XFRAME (selected_frame
));
6508 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
6509 error ("Keyboard macro terminated by a command ringing the bell");
6511 ring_bell (XFRAME (selected_frame
));
6516 /***********************************************************************
6518 ***********************************************************************/
6520 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
6521 doc
: /* Pause, without updating display, for SECONDS seconds.
6522 SECONDS may be a floating-point value, meaning that you can wait for a
6523 fraction of a second. Optional second arg MILLISECONDS specifies an
6524 additional wait period, in milliseconds; this may be useful if your
6525 Emacs was built without floating point support.
6526 \(Not all operating systems support waiting for a fraction of a second.) */)
6527 (seconds
, milliseconds
)
6528 Lisp_Object seconds
, milliseconds
;
6532 if (NILP (milliseconds
))
6533 XSETINT (milliseconds
, 0);
6535 CHECK_NUMBER (milliseconds
);
6536 usec
= XINT (milliseconds
) * 1000;
6539 double duration
= extract_float (seconds
);
6540 sec
= (int) duration
;
6541 usec
+= (duration
- sec
) * 1000000;
6544 #ifndef EMACS_HAS_USECS
6545 if (sec
== 0 && usec
!= 0)
6546 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
6549 /* Assure that 0 <= usec < 1000000. */
6552 /* We can't rely on the rounding being correct if usec is negative. */
6553 if (-1000000 < usec
)
6554 sec
--, usec
+= 1000000;
6556 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6559 sec
+= usec
/ 1000000, usec
%= 1000000;
6561 if (sec
< 0 || (sec
== 0 && usec
== 0))
6564 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6570 /* This is just like wait_reading_process_output, except that
6573 TIMEOUT is number of seconds to wait (float or integer),
6574 or t to wait forever.
6575 READING is 1 if reading input.
6576 If DO_DISPLAY is >0 display process output while waiting.
6577 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6581 sit_for (timeout
, reading
, do_display
)
6582 Lisp_Object timeout
;
6583 int reading
, do_display
;
6587 swallow_events (do_display
);
6589 if ((detect_input_pending_run_timers (do_display
))
6590 || !NILP (Vexecuting_kbd_macro
))
6593 if (do_display
>= 2)
6594 redisplay_preserve_echo_area (2);
6596 if (INTEGERP (timeout
))
6598 sec
= XINT (timeout
);
6601 else if (FLOATP (timeout
))
6603 double seconds
= XFLOAT_DATA (timeout
);
6604 sec
= (int) seconds
;
6605 usec
= (int) ((seconds
- sec
) * 1000000);
6607 else if (EQ (timeout
, Qt
))
6613 wrong_type_argument (Qnumberp
, timeout
);
6615 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6622 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6625 return detect_input_pending () ? Qnil
: Qt
;
6629 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6630 doc
: /* Perform redisplay if no input is available.
6631 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6632 perform a full redisplay even if input is available.
6633 Return t if redisplay was performed, nil otherwise. */)
6640 if ((detect_input_pending_run_timers (1)
6641 && NILP (force
) && !redisplay_dont_pause
)
6642 || !NILP (Vexecuting_kbd_macro
))
6645 count
= SPECPDL_INDEX ();
6646 if (!NILP (force
) && !redisplay_dont_pause
)
6647 specbind (Qredisplay_dont_pause
, Qt
);
6648 redisplay_preserve_echo_area (2);
6649 unbind_to (count
, Qnil
);
6655 /***********************************************************************
6656 Other Lisp Functions
6657 ***********************************************************************/
6659 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6660 session's frames, frame names, buffers, buffer-read-only flags, and
6661 buffer-modified-flags. */
6663 static Lisp_Object frame_and_buffer_state
;
6666 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6667 Sframe_or_buffer_changed_p
, 0, 1, 0,
6668 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6669 VARIABLE is a variable name whose value is either nil or a state vector
6670 that will be updated to contain all frames and buffers,
6671 aside from buffers whose names start with space,
6672 along with the buffers' read-only and modified flags. This allows a fast
6673 check to see whether buffer menus might need to be recomputed.
6674 If this function returns non-nil, it updates the internal vector to reflect
6677 If VARIABLE is nil, an internal variable is used. Users should not
6678 pass nil for VARIABLE. */)
6680 Lisp_Object variable
;
6682 Lisp_Object state
, tail
, frame
, buf
;
6683 Lisp_Object
*vecp
, *end
;
6686 if (! NILP (variable
))
6688 CHECK_SYMBOL (variable
);
6689 state
= Fsymbol_value (variable
);
6690 if (! VECTORP (state
))
6694 state
= frame_and_buffer_state
;
6696 vecp
= XVECTOR (state
)->contents
;
6697 end
= vecp
+ XVECTOR (state
)->size
;
6699 FOR_EACH_FRAME (tail
, frame
)
6703 if (!EQ (*vecp
++, frame
))
6707 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6710 /* Check that the buffer info matches. */
6711 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6713 buf
= XCDR (XCAR (tail
));
6714 /* Ignore buffers that aren't included in buffer lists. */
6715 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6719 if (!EQ (*vecp
++, buf
))
6723 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6727 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6732 /* Detect deletion of a buffer at the end of the list. */
6733 if (EQ (*vecp
, Qlambda
))
6736 /* Come here if we decide the data has changed. */
6738 /* Count the size we will need.
6739 Start with 1 so there is room for at least one lambda at the end. */
6741 FOR_EACH_FRAME (tail
, frame
)
6743 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6745 /* Reallocate the vector if data has grown to need it,
6746 or if it has shrunk a lot. */
6747 if (! VECTORP (state
)
6748 || n
> XVECTOR (state
)->size
6749 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6750 /* Add 20 extra so we grow it less often. */
6752 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6753 if (! NILP (variable
))
6754 Fset (variable
, state
);
6756 frame_and_buffer_state
= state
;
6759 /* Record the new data in the (possibly reallocated) vector. */
6760 vecp
= XVECTOR (state
)->contents
;
6761 FOR_EACH_FRAME (tail
, frame
)
6764 *vecp
++ = XFRAME (frame
)->name
;
6766 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6768 buf
= XCDR (XCAR (tail
));
6769 /* Ignore buffers that aren't included in buffer lists. */
6770 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6773 *vecp
++ = XBUFFER (buf
)->read_only
;
6774 *vecp
++ = Fbuffer_modified_p (buf
);
6776 /* Fill up the vector with lambdas (always at least one). */
6778 while (vecp
- XVECTOR (state
)->contents
6779 < XVECTOR (state
)->size
)
6781 /* Make sure we didn't overflow the vector. */
6782 if (vecp
- XVECTOR (state
)->contents
6783 > XVECTOR (state
)->size
)
6790 /***********************************************************************
6792 ***********************************************************************/
6794 /* Initialization done when Emacs fork is started, before doing stty.
6795 Determine terminal type and set terminal_driver. Then invoke its
6796 decoding routine to set up variables in the terminal package. */
6801 char *terminal_type
;
6803 #ifdef HAVE_X_WINDOWS
6804 extern int display_arg
;
6807 /* Construct the space glyph. */
6808 space_glyph
.type
= CHAR_GLYPH
;
6809 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6810 space_glyph
.charpos
= -1;
6813 cursor_in_echo_area
= 0;
6814 terminal_type
= (char *) 0;
6816 /* Now is the time to initialize this; it's used by init_sys_modes
6818 Vinitial_window_system
= Qnil
;
6820 /* SIGWINCH needs to be handled no matter what display we start
6821 with. Otherwise newly opened tty frames will not resize
6826 #endif /* CANNOT_DUMP */
6827 signal (SIGWINCH
, window_change_signal
);
6828 #endif /* SIGWINCH */
6830 /* If running as a daemon, no need to initialize any frames/terminal. */
6834 /* If the user wants to use a window system, we shouldn't bother
6835 initializing the terminal. This is especially important when the
6836 terminal is so dumb that emacs gives up before and doesn't bother
6837 using the window system.
6839 If the DISPLAY environment variable is set and nonempty,
6840 try to use X, and die with an error message if that doesn't work. */
6842 #ifdef HAVE_X_WINDOWS
6843 if (! inhibit_window_system
&& ! display_arg
)
6846 display
= getenv ("DISPLAY");
6847 display_arg
= (display
!= 0 && *display
!= 0);
6849 if (display_arg
&& !x_display_ok (display
))
6851 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6853 inhibit_window_system
= 1;
6857 if (!inhibit_window_system
&& display_arg
6863 Vinitial_window_system
= intern ("x");
6865 Vwindow_system_version
= make_number (11);
6867 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6868 /* In some versions of ncurses,
6869 tputs crashes if we have not called tgetent.
6871 { char b
[2044]; tgetent (b
, "xterm");}
6873 adjust_frame_glyphs_initially ();
6876 #endif /* HAVE_X_WINDOWS */
6879 if (!inhibit_window_system
)
6881 Vinitial_window_system
= intern ("w32");
6882 Vwindow_system_version
= make_number (1);
6883 adjust_frame_glyphs_initially ();
6886 #endif /* HAVE_NTGUI */
6889 if (!inhibit_window_system
6895 Vinitial_window_system
= intern("ns");
6896 Vwindow_system_version
= make_number(10);
6897 adjust_frame_glyphs_initially ();
6902 /* If no window system has been specified, try to use the terminal. */
6905 fatal ("standard input is not a tty");
6910 terminal_type
= "w32console";
6912 /* Look at the TERM variable. */
6913 terminal_type
= (char *) getenv ("TERM");
6917 #ifdef HAVE_WINDOW_SYSTEM
6918 if (! inhibit_window_system
)
6919 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6921 #endif /* HAVE_WINDOW_SYSTEM */
6922 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6928 struct frame
*f
= XFRAME (selected_frame
);
6930 /* Open a display on the controlling tty. */
6931 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6933 /* Convert the initial frame to use the new display. */
6934 if (f
->output_method
!= output_initial
)
6936 f
->output_method
= t
->type
;
6939 t
->reference_count
++;
6940 t
->display_info
.tty
->top_frame
= selected_frame
;
6941 change_frame_size (XFRAME (selected_frame
),
6942 FrameRows (t
->display_info
.tty
),
6943 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6945 /* Delete the initial terminal. */
6946 if (--initial_terminal
->reference_count
== 0
6947 && initial_terminal
->delete_terminal_hook
)
6948 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6950 /* Update frame parameters to reflect the new type. */
6951 Fmodify_frame_parameters
6952 (selected_frame
, Fcons (Fcons (Qtty_type
,
6953 Ftty_type (selected_frame
)), Qnil
));
6954 if (t
->display_info
.tty
->name
)
6955 Fmodify_frame_parameters (selected_frame
,
6956 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6959 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
6964 struct frame
*sf
= SELECTED_FRAME ();
6965 int width
= FRAME_TOTAL_COLS (sf
);
6966 int height
= FRAME_LINES (sf
);
6968 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6970 /* If these sizes are so big they cause overflow, just ignore the
6971 change. It's not clear what better we could do. */
6972 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6973 fatal ("screen size %dx%d too big", width
, height
);
6976 adjust_frame_glyphs_initially ();
6977 calculate_costs (XFRAME (selected_frame
));
6979 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6982 && NILP (Vinitial_window_system
))
6984 /* For the initial frame, we don't have any way of knowing what
6985 are the foreground and background colors of the terminal. */
6986 struct frame
*sf
= SELECTED_FRAME();
6988 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6989 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6990 call0 (intern ("tty-set-up-initial-frame-faces"));
6996 /***********************************************************************
6998 ***********************************************************************/
7000 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
7001 Sinternal_show_cursor
, 2, 2, 0,
7002 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
7003 WINDOW nil means use the selected window. SHOW non-nil means
7004 show a cursor in WINDOW in the next redisplay. SHOW nil means
7005 don't show a cursor. */)
7007 Lisp_Object window
, show
;
7009 /* Don't change cursor state while redisplaying. This could confuse
7011 if (!redisplaying_p
)
7014 window
= selected_window
;
7016 CHECK_WINDOW (window
);
7018 XWINDOW (window
)->cursor_off_p
= NILP (show
);
7025 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
7026 Sinternal_show_cursor_p
, 0, 1, 0,
7027 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
7028 WINDOW nil or omitted means report on the selected window. */)
7035 window
= selected_window
;
7037 CHECK_WINDOW (window
);
7039 w
= XWINDOW (window
);
7040 return w
->cursor_off_p
? Qnil
: Qt
;
7043 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
7044 Slast_nonminibuf_frame
, 0, 0, 0,
7045 doc
: /* Value is last nonminibuffer frame. */)
7048 Lisp_Object frame
= Qnil
;
7050 if (last_nonminibuf_frame
)
7051 XSETFRAME (frame
, last_nonminibuf_frame
);
7056 /***********************************************************************
7058 ***********************************************************************/
7063 defsubr (&Sredraw_frame
);
7064 defsubr (&Sredraw_display
);
7065 defsubr (&Sframe_or_buffer_changed_p
);
7066 defsubr (&Sopen_termscript
);
7068 defsubr (&Sredisplay
);
7069 defsubr (&Ssleep_for
);
7070 defsubr (&Ssend_string_to_terminal
);
7071 defsubr (&Sinternal_show_cursor
);
7072 defsubr (&Sinternal_show_cursor_p
);
7073 defsubr (&Slast_nonminibuf_frame
);
7076 defsubr (&Sdump_redisplay_history
);
7079 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
7080 staticpro (&frame_and_buffer_state
);
7082 Qdisplay_table
= intern ("display-table");
7083 staticpro (&Qdisplay_table
);
7084 Qredisplay_dont_pause
= intern ("redisplay-dont-pause");
7085 staticpro (&Qredisplay_dont_pause
);
7087 DEFVAR_INT ("baud-rate", &baud_rate
,
7088 doc
: /* *The output baud rate of the terminal.
7089 On most systems, changing this value will affect the amount of padding
7090 and the other strategic decisions made during redisplay. */);
7092 DEFVAR_BOOL ("inverse-video", &inverse_video
,
7093 doc
: /* *Non-nil means invert the entire frame display.
7094 This means everything is in inverse video which otherwise would not be. */);
7096 DEFVAR_BOOL ("visible-bell", &visible_bell
,
7097 doc
: /* *Non-nil means try to flash the frame to represent a bell.
7099 See also `ring-bell-function'. */);
7101 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
7102 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
7103 A non-nil value is useful if the terminal can automatically preserve
7104 Emacs's frame display when you reenter Emacs.
7105 It is up to you to set this variable if your terminal can do that. */);
7107 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
7108 doc
: /* Name of the window system that Emacs uses for the first frame.
7109 The value is a symbol--for instance, `x' for X windows.
7110 The value is nil if Emacs is using a text-only terminal. */);
7112 DEFVAR_KBOARD ("window-system", Vwindow_system
,
7113 doc
: /* Name of window system through which the selected frame is displayed.
7114 The value is a symbol--for instance, `x' for X windows.
7115 The value is nil if the selected frame is on a text-only-terminal. */);
7117 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
7118 doc
: /* The version number of the window system in use.
7119 For X windows, this is 11. */);
7121 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
7122 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
7124 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
7125 doc
: /* Table defining how to output a glyph code to the frame.
7126 If not nil, this is a vector indexed by glyph code to define the glyph.
7127 Each element can be:
7128 integer: a glyph code which this glyph is an alias for.
7129 string: output this glyph using that string (not impl. in X windows).
7130 nil: this glyph mod 524288 is the code of a character to output,
7131 and this glyph / 524288 is the face number (see `face-id') to use
7132 while outputting it. */);
7133 Vglyph_table
= Qnil
;
7135 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
7136 doc
: /* Display table to use for buffers that specify none.
7137 See `buffer-display-table' for more information. */);
7138 Vstandard_display_table
= Qnil
;
7140 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
7141 doc
: /* *Non-nil means update isn't paused when input is detected. */);
7142 redisplay_dont_pause
= 0;
7144 #if PERIODIC_PREEMPTION_CHECKING
7145 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
7146 doc
: /* *The period in seconds between checking for input during redisplay.
7147 If input is detected, redisplay is pre-empted, and the input is processed.
7148 If nil, never pre-empt redisplay. */);
7149 Vredisplay_preemption_period
= make_float (0.10);
7156 Vinitial_window_system
= Qnil
;
7157 Vwindow_system_version
= Qnil
;
7161 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
7162 (do not change this comment) */