1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
32 #include "termhooks.h"
33 /* cm.h must come after dispextern.h on Windows. */
34 #include "dispextern.h"
42 #include "intervals.h"
43 #include "blockinput.h"
46 #include "syssignal.h"
50 #endif /* HAVE_X_WINDOWS */
54 #endif /* HAVE_NTGUI */
56 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
61 #define max(a, b) ((a) > (b) ? (a) : (b))
62 #define min(a, b) ((a) < (b) ? (a) : (b))
64 /* Get number of chars of output now in the buffer of a stdio stream.
65 This ought to be built in in stdio, but it isn't.
66 Some s- files override this because their stdio internals differ. */
67 #ifdef __GNU_LIBRARY__
68 /* The s- file might have overridden the definition with one that works for
69 the system's C library. But we are using the GNU C library, so this is
70 the right definition for every system. */
71 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
72 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
74 #undef PENDING_OUTPUT_COUNT
75 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
77 #else /* not __GNU_LIBRARY__ */
78 #ifndef PENDING_OUTPUT_COUNT
79 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
83 static void change_frame_size_1 ();
85 /* Nonzero upon entry to redisplay means do not assume anything about
86 current contents of actual terminal frame; clear and redraw it. */
90 /* Nonzero means last display completed. Zero means it was preempted. */
92 int display_completed
;
94 /* Lisp variable visible-bell; enables use of screen-flash
95 instead of audible bell. */
99 /* Invert the color of the whole frame, at a low level. */
103 /* Line speed of the terminal. */
107 /* nil or a symbol naming the window system under which emacs is
108 running ('x is the only current possibility). */
110 Lisp_Object Vwindow_system
;
112 /* Version number of X windows: 10, 11 or nil. */
113 Lisp_Object Vwindow_system_version
;
115 /* Vector of glyph definitions. Indexed by glyph number,
116 the contents are a string which is how to output the glyph.
118 If Vglyph_table is nil, a glyph is output by using its low 8 bits
119 as a character code. */
121 Lisp_Object Vglyph_table
;
123 /* Display table to use for vectors that don't specify their own. */
125 Lisp_Object Vstandard_display_table
;
127 /* Nonzero means reading single-character input with prompt
128 so put cursor on minibuffer after the prompt.
129 positive means at end of text in echo area;
130 negative means at beginning of line. */
131 int cursor_in_echo_area
;
133 Lisp_Object Qdisplay_table
;
135 /* The currently selected frame.
136 In a single-frame version, this variable always holds the address of
139 FRAME_PTR selected_frame
;
141 /* A frame which is not just a minibuffer, or 0 if there are no such
142 frames. This is usually the most recent such frame that was
143 selected. In a single-frame version, this variable always holds
144 the address of the_only_frame. */
145 FRAME_PTR last_nonminibuf_frame
;
147 /* This is a vector, made larger whenever it isn't large enough,
148 which is used inside `update_frame' to hold the old contents
149 of the FRAME_PHYS_LINES of the frame being updated. */
150 struct frame_glyphs
**ophys_lines
;
151 /* Length of vector currently allocated. */
152 int ophys_lines_length
;
154 FILE *termscript
; /* Stdio stream being used for copy of all output. */
156 struct cm Wcm
; /* Structure for info on cursor positioning */
158 int delayed_size_change
; /* 1 means SIGWINCH happened when not safe. */
160 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
161 "Clear frame FRAME and output again what is supposed to appear on it.")
167 CHECK_LIVE_FRAME (frame
, 0);
170 if (FRAME_MSDOS_P (f
))
171 set_terminal_modes ();
173 clear_frame_records (f
);
176 windows_or_buffers_changed
++;
177 /* Mark all windows as INaccurate,
178 so that every window will have its redisplay done. */
179 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
188 XSETFRAME (frame
, f
);
189 Fredraw_frame (frame
);
192 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
193 "Clear and redisplay all visible frames.")
196 Lisp_Object tail
, frame
;
198 FOR_EACH_FRAME (tail
, frame
)
199 if (FRAME_VISIBLE_P (XFRAME (frame
)))
200 Fredraw_frame (frame
);
205 /* This is used when frame_garbaged is set.
206 Redraw the individual frames marked as garbaged. */
209 redraw_garbaged_frames ()
211 Lisp_Object tail
, frame
;
213 FOR_EACH_FRAME (tail
, frame
)
214 if (FRAME_VISIBLE_P (XFRAME (frame
))
215 && FRAME_GARBAGED_P (XFRAME (frame
)))
216 Fredraw_frame (frame
);
220 static struct frame_glyphs
*
221 make_frame_glyphs (frame
, empty
)
222 register FRAME_PTR frame
;
226 register width
= FRAME_WIDTH (frame
);
227 register height
= FRAME_HEIGHT (frame
);
228 register struct frame_glyphs
*new
229 = (struct frame_glyphs
*) xmalloc (sizeof (struct frame_glyphs
));
231 SET_GLYPHS_FRAME (new, frame
);
232 new->height
= height
;
234 new->used
= (int *) xmalloc (height
* sizeof (int));
235 new->glyphs
= (GLYPH
**) xmalloc (height
* sizeof (GLYPH
*));
236 new->charstarts
= (int **) xmalloc (height
* sizeof (int *));
237 new->highlight
= (char *) xmalloc (height
* sizeof (char));
238 new->enable
= (char *) xmalloc (height
* sizeof (char));
239 bzero (new->enable
, height
* sizeof (char));
240 new->bufp
= (int *) xmalloc (height
* sizeof (int));
242 #ifdef HAVE_WINDOW_SYSTEM
243 if (FRAME_WINDOW_P (frame
))
245 new->top_left_x
= (short *) xmalloc (height
* sizeof (short));
246 new->top_left_y
= (short *) xmalloc (height
* sizeof (short));
247 new->pix_width
= (short *) xmalloc (height
* sizeof (short));
248 new->pix_height
= (short *) xmalloc (height
* sizeof (short));
249 new->max_ascent
= (short *) xmalloc (height
* sizeof (short));
251 #endif /* HAVE_WINDOW_SYSTEM */
255 /* Make the buffer used by decode_mode_spec. This buffer is also
256 used as temporary storage when updating the frame. See scroll.c. */
257 unsigned int total_glyphs
= (width
+ 2) * sizeof (GLYPH
);
258 unsigned int total_charstarts
= (width
+ 2) * sizeof (int);
260 new->total_contents
= (GLYPH
*) xmalloc (total_glyphs
);
261 bzero (new->total_contents
, total_glyphs
);
263 new->total_charstarts
= (int *) xmalloc (total_charstarts
);
264 bzero (new->total_charstarts
, total_charstarts
);
268 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (GLYPH
);
270 new->total_contents
= (GLYPH
*) xmalloc (total_glyphs
);
271 bzero (new->total_contents
, total_glyphs
);
272 for (i
= 0; i
< height
; i
++)
273 new->glyphs
[i
] = new->total_contents
+ i
* (width
+ 2) + 1;
275 if (!FRAME_TERMCAP_P (frame
))
277 unsigned int total_charstarts
= height
* (width
+ 2) * sizeof (int);
279 new->total_charstarts
= (int *) xmalloc (total_charstarts
);
280 bzero (new->total_charstarts
, total_charstarts
);
281 for (i
= 0; i
< height
; i
++)
282 new->charstarts
[i
] = new->total_charstarts
+ i
* (width
+ 2) + 1;
286 /* Without a window system, we don't really need charstarts.
287 So use a small amount of space to make enough data structure
288 to prevent crashes in display_text_line. */
289 new->total_charstarts
= (int *) xmalloc ((width
+ 2) * sizeof (int));
290 for (i
= 0; i
< height
; i
++)
291 new->charstarts
[i
] = new->total_charstarts
;
299 free_frame_glyphs (frame
, glyphs
)
301 struct frame_glyphs
*glyphs
;
303 if (glyphs
->total_contents
)
304 xfree (glyphs
->total_contents
);
305 if (glyphs
->total_charstarts
)
306 xfree (glyphs
->total_charstarts
);
308 xfree (glyphs
->used
);
309 xfree (glyphs
->glyphs
);
310 xfree (glyphs
->highlight
);
311 xfree (glyphs
->enable
);
312 xfree (glyphs
->bufp
);
313 if (glyphs
->charstarts
)
314 xfree (glyphs
->charstarts
);
316 #ifdef HAVE_WINDOW_SYSTEM
317 if (FRAME_WINDOW_P (frame
))
319 xfree (glyphs
->top_left_x
);
320 xfree (glyphs
->top_left_y
);
321 xfree (glyphs
->pix_width
);
322 xfree (glyphs
->pix_height
);
323 xfree (glyphs
->max_ascent
);
325 #endif /* HAVE_WINDOW_SYSTEM */
331 remake_frame_glyphs (frame
)
334 if (FRAME_CURRENT_GLYPHS (frame
))
335 free_frame_glyphs (frame
, FRAME_CURRENT_GLYPHS (frame
));
336 if (FRAME_DESIRED_GLYPHS (frame
))
337 free_frame_glyphs (frame
, FRAME_DESIRED_GLYPHS (frame
));
338 if (FRAME_TEMP_GLYPHS (frame
))
339 free_frame_glyphs (frame
, FRAME_TEMP_GLYPHS (frame
));
341 if (FRAME_MESSAGE_BUF (frame
))
343 /* Reallocate the frame's message buffer; remember that
344 echo_area_glyphs may be pointing here. */
345 char *old_message_buf
= FRAME_MESSAGE_BUF (frame
);
347 FRAME_MESSAGE_BUF (frame
)
348 = (char *) xrealloc (FRAME_MESSAGE_BUF (frame
),
349 FRAME_WIDTH (frame
) + 1);
351 if (echo_area_glyphs
== old_message_buf
)
352 echo_area_glyphs
= FRAME_MESSAGE_BUF (frame
);
353 if (previous_echo_glyphs
== old_message_buf
)
354 previous_echo_glyphs
= FRAME_MESSAGE_BUF (frame
);
357 FRAME_MESSAGE_BUF (frame
)
358 = (char *) xmalloc (FRAME_WIDTH (frame
) + 1);
360 FRAME_CURRENT_GLYPHS (frame
) = make_frame_glyphs (frame
, 0);
361 FRAME_DESIRED_GLYPHS (frame
) = make_frame_glyphs (frame
, 0);
362 FRAME_TEMP_GLYPHS (frame
) = make_frame_glyphs (frame
, 1);
363 if (FRAME_WINDOW_P (frame
) || frame
== selected_frame
)
364 SET_FRAME_GARBAGED (frame
);
367 /* Return the hash code of contents of line VPOS in frame-matrix M. */
370 line_hash_code (m
, vpos
)
371 register struct frame_glyphs
*m
;
374 register GLYPH
*body
, *end
;
377 if (!m
->enable
[vpos
])
380 /* Give all highlighted lines the same hash code
381 so as to encourage scrolling to leave them in place. */
382 if (m
->highlight
[vpos
])
385 body
= m
->glyphs
[vpos
];
387 if (must_write_spaces
)
394 h
= (((h
<< 4) + (h
>> 24)) & 0x0fffffff) + g
- SPACEGLYPH
;
403 h
= (((h
<< 4) + (h
>> 24)) & 0x0fffffff) + g
;
411 /* Return number of characters in line in M at vpos VPOS,
412 except don't count leading and trailing spaces
413 unless the terminal requires those to be explicitly output. */
416 line_draw_cost (m
, vpos
)
417 struct frame_glyphs
*m
;
420 register GLYPH
*beg
= m
->glyphs
[vpos
];
421 register GLYPH
*end
= m
->glyphs
[vpos
] + m
->used
[vpos
];
423 register int tlen
= GLYPH_TABLE_LENGTH
;
424 register Lisp_Object
*tbase
= GLYPH_TABLE_BASE
;
426 /* Ignore trailing and leading spaces if we can. */
427 if (!must_write_spaces
)
429 while ((end
!= beg
) && (*end
== SPACEGLYPH
))
432 return (0); /* All blank line. */
434 while (*beg
== SPACEGLYPH
)
438 /* If we don't have a glyph-table, each glyph is one character,
439 so return the number of glyphs. */
443 /* Otherwise, scan the glyphs and accumulate their total size in I. */
445 while ((beg
<= end
) && *beg
)
447 register GLYPH g
= *beg
++;
449 if (GLYPH_SIMPLE_P (tbase
, tlen
, g
))
452 i
+= GLYPH_LENGTH (tbase
, g
);
457 /* The functions on this page are the interface from xdisp.c to redisplay.
459 The only other interface into redisplay is through setting
460 FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame)
461 and SET_FRAME_GARBAGED (frame). */
463 /* cancel_line eliminates any request to display a line at position `vpos' */
465 cancel_line (vpos
, frame
)
467 register FRAME_PTR frame
;
469 FRAME_DESIRED_GLYPHS (frame
)->enable
[vpos
] = 0;
472 clear_frame_records (frame
)
473 register FRAME_PTR frame
;
475 bzero (FRAME_CURRENT_GLYPHS (frame
)->enable
, FRAME_HEIGHT (frame
));
478 /* Clear out all display lines for a coming redisplay. */
481 init_desired_glyphs (frame
)
482 register FRAME_PTR frame
;
484 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (frame
);
486 int height
= FRAME_HEIGHT (frame
);
488 for (vpos
= 0; vpos
< height
; vpos
++)
489 desired_glyphs
->enable
[vpos
] = 0;
492 /* Prepare to display on line VPOS starting at HPOS within it. */
495 get_display_line (frame
, vpos
, hpos
)
496 register FRAME_PTR frame
;
500 register struct frame_glyphs
*glyphs
;
501 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (frame
);
507 if (! desired_glyphs
->enable
[vpos
])
509 desired_glyphs
->used
[vpos
] = 0;
510 desired_glyphs
->highlight
[vpos
] = 0;
511 desired_glyphs
->enable
[vpos
] = 1;
514 if (hpos
> desired_glyphs
->used
[vpos
])
516 GLYPH
*g
= desired_glyphs
->glyphs
[vpos
] + desired_glyphs
->used
[vpos
];
517 GLYPH
*end
= desired_glyphs
->glyphs
[vpos
] + hpos
;
519 desired_glyphs
->used
[vpos
] = hpos
;
525 /* Like bcopy except never gets confused by overlap. */
528 safe_bcopy (from
, to
, size
)
532 if (size
<= 0 || from
== to
)
535 /* If the source and destination don't overlap, then bcopy can
536 handle it. If they do overlap, but the destination is lower in
537 memory than the source, we'll assume bcopy can handle that. */
538 if (to
< from
|| from
+ size
<= to
)
539 bcopy (from
, to
, size
);
541 /* Otherwise, we'll copy from the end. */
544 register char *endf
= from
+ size
;
545 register char *endt
= to
+ size
;
547 /* If TO - FROM is large, then we should break the copy into
548 nonoverlapping chunks of TO - FROM bytes each. However, if
549 TO - FROM is small, then the bcopy function call overhead
550 makes this not worth it. The crossover point could be about
551 anywhere. Since I don't think the obvious copy loop is too
552 bad, I'm trying to err in its favor. */
557 while (endf
!= from
);
569 bcopy (endf
, endt
, to
- from
);
572 /* If SIZE wasn't a multiple of TO - FROM, there will be a
573 little left over. The amount left over is
574 (endt + (to - from)) - to, which is endt - from. */
575 bcopy (from
, to
, endt
- from
);
580 /* Rotate a vector of SIZE bytes right, by DISTANCE bytes.
581 DISTANCE may be negative. */
584 rotate_vector (vector
, size
, distance
)
589 char *temp
= (char *) alloca (size
);
594 bcopy (vector
, temp
+ distance
, size
- distance
);
595 bcopy (vector
+ size
- distance
, temp
, distance
);
596 bcopy (temp
, vector
, size
);
599 /* Scroll lines from vpos FROM up to but not including vpos END
600 down by AMOUNT lines (AMOUNT may be negative).
601 Returns nonzero if done, zero if terminal cannot scroll them. */
604 scroll_frame_lines (frame
, from
, end
, amount
, newpos
)
605 register FRAME_PTR frame
;
606 int from
, end
, amount
, newpos
;
609 register struct frame_glyphs
*current_frame
610 = FRAME_CURRENT_GLYPHS (frame
);
612 int width
= FRAME_WIDTH (frame
);
614 if (!line_ins_del_ok
)
622 update_begin (frame
);
623 set_terminal_window (end
+ amount
);
624 if (!scroll_region_ok
)
625 ins_del_lines (end
, -amount
);
626 ins_del_lines (from
, amount
);
627 set_terminal_window (0);
629 rotate_vector (current_frame
->glyphs
+ from
,
630 sizeof (GLYPH
*) * (end
+ amount
- from
),
631 amount
* sizeof (GLYPH
*));
633 rotate_vector (current_frame
->charstarts
+ from
,
634 sizeof (int *) * (end
+ amount
- from
),
635 amount
* sizeof (int *));
637 safe_bcopy (current_frame
->used
+ from
,
638 current_frame
->used
+ from
+ amount
,
639 (end
- from
) * sizeof current_frame
->used
[0]);
641 safe_bcopy (current_frame
->highlight
+ from
,
642 current_frame
->highlight
+ from
+ amount
,
643 (end
- from
) * sizeof current_frame
->highlight
[0]);
645 safe_bcopy (current_frame
->enable
+ from
,
646 current_frame
->enable
+ from
+ amount
,
647 (end
- from
) * sizeof current_frame
->enable
[0]);
649 /* Adjust the lines by an amount
650 that puts the first of them at NEWPOS. */
651 pos_adjust
= newpos
- current_frame
->charstarts
[from
+ amount
][0];
653 /* Offset each char position in the charstarts lines we moved
655 for (i
= from
+ amount
; i
< end
+ amount
; i
++)
657 int *line
= current_frame
->charstarts
[i
];
659 for (col
= 0; col
< width
; col
++)
661 line
[col
] += pos_adjust
;
663 for (i
= from
; i
< from
+ amount
; i
++)
665 int *line
= current_frame
->charstarts
[i
];
668 for (col
= 0; col
< width
; col
++)
672 /* Mark the lines made empty by scrolling as enabled, empty and
674 bzero (current_frame
->used
+ from
,
675 amount
* sizeof current_frame
->used
[0]);
676 bzero (current_frame
->highlight
+ from
,
677 amount
* sizeof current_frame
->highlight
[0]);
678 for (i
= from
; i
< from
+ amount
; i
++)
680 current_frame
->glyphs
[i
][0] = '\0';
681 current_frame
->charstarts
[i
][0] = -1;
682 current_frame
->enable
[i
] = 1;
685 safe_bcopy (current_frame
->bufp
+ from
,
686 current_frame
->bufp
+ from
+ amount
,
687 (end
- from
) * sizeof current_frame
->bufp
[0]);
689 #ifdef HAVE_WINDOW_SYSTEM
690 if (FRAME_WINDOW_P (frame
))
692 safe_bcopy (current_frame
->top_left_x
+ from
,
693 current_frame
->top_left_x
+ from
+ amount
,
694 (end
- from
) * sizeof current_frame
->top_left_x
[0]);
696 safe_bcopy (current_frame
->top_left_y
+ from
,
697 current_frame
->top_left_y
+ from
+ amount
,
698 (end
- from
) * sizeof current_frame
->top_left_y
[0]);
700 safe_bcopy (current_frame
->pix_width
+ from
,
701 current_frame
->pix_width
+ from
+ amount
,
702 (end
- from
) * sizeof current_frame
->pix_width
[0]);
704 safe_bcopy (current_frame
->pix_height
+ from
,
705 current_frame
->pix_height
+ from
+ amount
,
706 (end
- from
) * sizeof current_frame
->pix_height
[0]);
708 safe_bcopy (current_frame
->max_ascent
+ from
,
709 current_frame
->max_ascent
+ from
+ amount
,
710 (end
- from
) * sizeof current_frame
->max_ascent
[0]);
712 #endif /* HAVE_WINDOW_SYSTEM */
718 update_begin (frame
);
719 set_terminal_window (end
);
720 ins_del_lines (from
+ amount
, amount
);
721 if (!scroll_region_ok
)
722 ins_del_lines (end
+ amount
, -amount
);
723 set_terminal_window (0);
725 rotate_vector (current_frame
->glyphs
+ from
+ amount
,
726 sizeof (GLYPH
*) * (end
- from
- amount
),
727 amount
* sizeof (GLYPH
*));
729 rotate_vector (current_frame
->charstarts
+ from
+ amount
,
730 sizeof (int *) * (end
- from
- amount
),
731 amount
* sizeof (int *));
733 safe_bcopy (current_frame
->used
+ from
,
734 current_frame
->used
+ from
+ amount
,
735 (end
- from
) * sizeof current_frame
->used
[0]);
737 safe_bcopy (current_frame
->highlight
+ from
,
738 current_frame
->highlight
+ from
+ amount
,
739 (end
- from
) * sizeof current_frame
->highlight
[0]);
741 safe_bcopy (current_frame
->enable
+ from
,
742 current_frame
->enable
+ from
+ amount
,
743 (end
- from
) * sizeof current_frame
->enable
[0]);
745 /* Adjust the lines by an amount
746 that puts the first of them at NEWPOS. */
747 pos_adjust
= newpos
- current_frame
->charstarts
[from
+ amount
][0];
749 /* Offset each char position in the charstarts lines we moved
751 for (i
= from
+ amount
; i
< end
+ amount
; i
++)
753 int *line
= current_frame
->charstarts
[i
];
755 for (col
= 0; col
< width
; col
++)
757 line
[col
] += pos_adjust
;
759 for (i
= end
+ amount
; i
< end
; i
++)
761 int *line
= current_frame
->charstarts
[i
];
764 for (col
= 0; col
< width
; col
++)
768 /* Mark the lines made empty by scrolling as enabled, empty and
770 bzero (current_frame
->used
+ end
+ amount
,
771 - amount
* sizeof current_frame
->used
[0]);
772 bzero (current_frame
->highlight
+ end
+ amount
,
773 - amount
* sizeof current_frame
->highlight
[0]);
774 for (i
= end
+ amount
; i
< end
; i
++)
776 current_frame
->glyphs
[i
][0] = '\0';
777 current_frame
->charstarts
[i
][0] = 0;
778 current_frame
->enable
[i
] = 1;
781 safe_bcopy (current_frame
->bufp
+ from
,
782 current_frame
->bufp
+ from
+ amount
,
783 (end
- from
) * sizeof current_frame
->bufp
[0]);
785 #ifdef HAVE_WINDOW_SYSTEM
786 if (FRAME_WINDOW_P (frame
))
788 safe_bcopy (current_frame
->top_left_x
+ from
,
789 current_frame
->top_left_x
+ from
+ amount
,
790 (end
- from
) * sizeof current_frame
->top_left_x
[0]);
792 safe_bcopy (current_frame
->top_left_y
+ from
,
793 current_frame
->top_left_y
+ from
+ amount
,
794 (end
- from
) * sizeof current_frame
->top_left_y
[0]);
796 safe_bcopy (current_frame
->pix_width
+ from
,
797 current_frame
->pix_width
+ from
+ amount
,
798 (end
- from
) * sizeof current_frame
->pix_width
[0]);
800 safe_bcopy (current_frame
->pix_height
+ from
,
801 current_frame
->pix_height
+ from
+ amount
,
802 (end
- from
) * sizeof current_frame
->pix_height
[0]);
804 safe_bcopy (current_frame
->max_ascent
+ from
,
805 current_frame
->max_ascent
+ from
+ amount
,
806 (end
- from
) * sizeof current_frame
->max_ascent
[0]);
808 #endif /* HAVE_WINDOW_SYSTEM */
815 /* After updating a window W that isn't the full frame wide,
816 copy all the columns that W does not occupy
817 into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame)
818 so that update_frame will not change those columns. */
820 preserve_other_columns (w
)
824 register struct frame_glyphs
*current_frame
, *desired_frame
;
825 register FRAME_PTR frame
= XFRAME (w
->frame
);
826 int start
= WINDOW_LEFT_MARGIN (w
);
827 int end
= WINDOW_RIGHT_EDGE (w
);
828 int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
830 current_frame
= FRAME_CURRENT_GLYPHS (frame
);
831 desired_frame
= FRAME_DESIRED_GLYPHS (frame
);
833 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
835 if (current_frame
->enable
[vpos
] && desired_frame
->enable
[vpos
])
841 bcopy (current_frame
->glyphs
[vpos
],
842 desired_frame
->glyphs
[vpos
],
843 start
* sizeof (current_frame
->glyphs
[vpos
][0]));
844 bcopy (current_frame
->charstarts
[vpos
],
845 desired_frame
->charstarts
[vpos
],
846 start
* sizeof (current_frame
->charstarts
[vpos
][0]));
847 len
= min (start
, current_frame
->used
[vpos
]);
848 if (desired_frame
->used
[vpos
] < len
)
849 desired_frame
->used
[vpos
] = len
;
851 if (current_frame
->used
[vpos
] > end
852 && desired_frame
->used
[vpos
] < current_frame
->used
[vpos
])
854 while (desired_frame
->used
[vpos
] < end
)
856 int used
= desired_frame
->used
[vpos
]++;
857 desired_frame
->glyphs
[vpos
][used
] = SPACEGLYPH
;
858 desired_frame
->glyphs
[vpos
][used
] = 0;
860 bcopy (current_frame
->glyphs
[vpos
] + end
,
861 desired_frame
->glyphs
[vpos
] + end
,
862 ((current_frame
->used
[vpos
] - end
)
863 * sizeof (current_frame
->glyphs
[vpos
][0])));
864 bcopy (current_frame
->charstarts
[vpos
] + end
,
865 desired_frame
->charstarts
[vpos
] + end
,
866 ((current_frame
->used
[vpos
] - end
)
867 * sizeof (current_frame
->charstarts
[vpos
][0])));
868 desired_frame
->used
[vpos
] = current_frame
->used
[vpos
];
876 /* If window w does not need to be updated and isn't the full frame wide,
877 copy all the columns that w does occupy
878 into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame)
879 so that update_frame will not change those columns.
881 Have not been able to figure out how to use this correctly. */
883 preserve_my_columns (w
)
886 register int vpos
, fin
;
887 register struct frame_glyphs
*l1
, *l2
;
888 register FRAME_PTR frame
= XFRAME (w
->frame
);
889 int start
= WINDOW_LEFT_MARGIN (w
);
890 int end
= WINDOW_RIGHT_EDGE (w
);
891 int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
893 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
895 if ((l1
= FRAME_DESIRED_GLYPHS (frame
)->glyphs
[vpos
+ 1])
896 && (l2
= FRAME_PHYS_GLYPHS (frame
)->glyphs
[vpos
+ 1]))
898 if (l2
->length
> start
&& l1
->length
< l2
->length
)
901 if (fin
> end
) fin
= end
;
902 while (l1
->length
< start
)
903 l1
->body
[l1
->length
++] = ' ';
904 bcopy (l2
->body
+ start
, l1
->body
+ start
, fin
- start
);
913 /* Adjust by ADJUST the charstart values in window W
914 after vpos VPOS, which counts relative to the frame
915 (not relative to W itself). */
918 adjust_window_charstarts (w
, vpos
, adjust
)
923 int left
= WINDOW_LEFT_MARGIN (w
);
924 int top
= XFASTINT (w
->top
);
925 int right
= left
+ window_internal_width (w
);
926 int bottom
= top
+ window_internal_height (w
);
929 for (i
= vpos
+ 1; i
< bottom
; i
++)
932 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[i
];
934 for (j
= left
; j
< right
; j
++)
935 if (charstart
[j
] > 0)
936 charstart
[j
] += adjust
;
940 /* Check the charstarts values in the area of window W
941 for internal consistency. We cannot check that they are "right";
942 we can only look for something nonsensical. */
944 verify_charstarts (w
)
947 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
949 int top
= XFASTINT (w
->top
);
950 int bottom
= top
+ window_internal_height (w
);
951 int left
= WINDOW_LEFT_MARGIN (w
);
952 int right
= left
+ window_internal_width (w
);
954 int truncate
= (XINT (w
->hscroll
)
955 || (truncate_partial_width_windows
956 && !WINDOW_FULL_WIDTH_P (w
))
957 || !NILP (XBUFFER (w
->buffer
)->truncate_lines
));
959 for (i
= top
; i
< bottom
; i
++)
963 int *charstart
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[i
];
969 /* If we are truncating lines, allow a jump
970 in charstarts from one line to the next. */
971 if (charstart
[left
] < next_line
)
976 if (charstart
[left
] != next_line
)
981 for (j
= left
; j
< right
; j
++)
982 if (charstart
[j
] > 0)
984 /* Record where the next line should start. */
986 if (BUF_ZV (XBUFFER (w
->buffer
)) != last
)
988 /* If there's a newline between the two lines, count that. */
989 int endchar
= *BUF_CHAR_ADDRESS (XBUFFER (w
->buffer
), last
);
996 /* On discovering that the redisplay for a window was no good,
997 cancel the columns of that window, so that when the window is
998 displayed over again get_display_line will not complain. */
1000 cancel_my_columns (w
)
1004 register struct frame_glyphs
*desired_glyphs
1005 = FRAME_DESIRED_GLYPHS (XFRAME (w
->frame
));
1006 register int start
= WINDOW_LEFT_MARGIN (w
);
1007 register int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
1009 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
1010 if (desired_glyphs
->enable
[vpos
]
1011 && desired_glyphs
->used
[vpos
] >= start
)
1012 desired_glyphs
->used
[vpos
] = start
;
1015 /* These functions try to perform directly and immediately on the frame
1016 the necessary output for one change in the buffer.
1017 They may return 0 meaning nothing was done if anything is difficult,
1018 or 1 meaning the output was performed properly.
1019 They assume that the frame was up to date before the buffer
1020 change being displayed. They make various other assumptions too;
1021 see command_loop_1 where these are called. */
1024 direct_output_for_insert (g
)
1027 register FRAME_PTR frame
= selected_frame
;
1028 register struct frame_glyphs
*current_frame
1029 = FRAME_CURRENT_GLYPHS (frame
);
1031 #ifndef COMPILER_REGISTER_BUG
1033 #endif /* COMPILER_REGISTER_BUG */
1034 struct window
*w
= XWINDOW (selected_window
);
1035 #ifndef COMPILER_REGISTER_BUG
1037 #endif /* COMPILER_REGISTER_BUG */
1038 int hpos
= FRAME_CURSOR_X (frame
);
1039 #ifndef COMPILER_REGISTER_BUG
1041 #endif /* COMPILER_REGISTER_BUG */
1042 int vpos
= FRAME_CURSOR_Y (frame
);
1044 /* Give up if about to continue line. */
1045 if (hpos
>= WINDOW_LEFT_MARGIN (w
) + window_internal_width (w
) - 1
1047 /* Avoid losing if cursor is in invisible text off left margin */
1048 || (XINT (w
->hscroll
) && hpos
== WINDOW_LEFT_MARGIN (w
))
1050 /* Give up if cursor outside window (in minibuf, probably) */
1051 || cursor_in_echo_area
1052 || FRAME_CURSOR_Y (frame
) < XFASTINT (w
->top
)
1053 || FRAME_CURSOR_Y (frame
) >= XFASTINT (w
->top
) + XFASTINT (w
->height
)
1055 /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */
1056 || !display_completed
1058 /* Give up if buffer appears in two places. */
1059 || buffer_shared
> 1
1061 #ifdef USE_TEXT_PROPERTIES
1062 /* Intervals have already been adjusted, point is after the
1063 character that was just inserted. */
1064 /* Give up if character is invisible. */
1065 /* Give up if character has a face property.
1066 At the moment we only lose at end of line or end of buffer
1067 and only with faces that have some background */
1068 /* Instead of wasting time, give up if character has any text properties */
1069 || ! NILP (Ftext_properties_at (make_number (PT
- 1), Qnil
))
1072 /* Give up if w is minibuffer and a message is being displayed there */
1073 || (MINI_WINDOW_P (w
) && echo_area_glyphs
))
1081 if (FRAME_WINDOW_P (frame
) || FRAME_MSDOS_P (frame
))
1082 face
= compute_char_face (frame
, w
, PT
- 1, -1, -1, &dummy
, PT
, 0);
1084 current_frame
->glyphs
[vpos
][hpos
] = MAKE_GLYPH (frame
, g
, face
);
1085 current_frame
->charstarts
[vpos
][hpos
] = PT
- 1;
1086 /* Record the entry for after the newly inserted character. */
1087 current_frame
->charstarts
[vpos
][hpos
+ 1] = PT
;
1088 adjust_window_charstarts (w
, vpos
, 1);
1090 unchanged_modified
= MODIFF
;
1091 beg_unchanged
= GPT
- BEG
;
1092 XSETFASTINT (w
->last_point
, PT
);
1093 XSETFASTINT (w
->last_point_x
, hpos
);
1094 XSETFASTINT (w
->last_modified
, MODIFF
);
1095 XSETFASTINT (w
->last_overlay_modified
, OVERLAY_MODIFF
);
1097 reassert_line_highlight (0, vpos
);
1098 write_glyphs (¤t_frame
->glyphs
[vpos
][hpos
], 1);
1100 ++FRAME_CURSOR_X (frame
);
1101 if (hpos
== current_frame
->used
[vpos
])
1103 current_frame
->used
[vpos
] = hpos
+ 1;
1104 current_frame
->glyphs
[vpos
][hpos
+ 1] = 0;
1111 direct_output_forward_char (n
)
1114 register FRAME_PTR frame
= selected_frame
;
1115 register struct window
*w
= XWINDOW (selected_window
);
1116 Lisp_Object position
;
1117 int hpos
= FRAME_CURSOR_X (frame
);
1119 /* Give up if in truncated text at end of line. */
1120 if (hpos
>= WINDOW_LEFT_MARGIN (w
) + window_internal_width (w
) - 1)
1123 /* Avoid losing if cursor is in invisible text off left margin
1124 or about to go off either side of window. */
1125 if ((FRAME_CURSOR_X (frame
) == WINDOW_LEFT_MARGIN (w
)
1126 && (XINT (w
->hscroll
) || n
< 0))
1128 && (FRAME_CURSOR_X (frame
) + 1 >= window_internal_width (w
) - 1))
1129 || cursor_in_echo_area
)
1132 /* Can't use direct output if highlighting a region. */
1133 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
1136 /* Can't use direct output at an overlay boundary; it might have
1137 before-string or after-string properties. */
1138 if (overlay_touches_p (PT
) || overlay_touches_p (PT
- n
))
1141 #ifdef USE_TEXT_PROPERTIES
1142 /* Don't use direct output next to an invisible character
1143 since we might need to do something special. */
1145 XSETFASTINT (position
, PT
);
1146 if (XFASTINT (position
) < ZV
1147 && ! NILP (Fget_char_property (position
,
1152 XSETFASTINT (position
, PT
- 1);
1153 if (XFASTINT (position
) >= BEGV
1154 && ! NILP (Fget_char_property (position
,
1160 FRAME_CURSOR_X (frame
) += n
;
1161 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (frame
));
1162 XSETFASTINT (w
->last_point
, PT
);
1163 cursor_to (FRAME_CURSOR_Y (frame
), FRAME_CURSOR_X (frame
));
1169 static void update_line ();
1171 /* Update frame F based on the data in FRAME_DESIRED_GLYPHS.
1172 Value is nonzero if redisplay stopped due to pending input.
1173 FORCE nonzero means do not stop for pending input. */
1176 update_frame (f
, force
, inhibit_hairy_id
)
1179 int inhibit_hairy_id
;
1181 register struct frame_glyphs
*current_frame
;
1182 register struct frame_glyphs
*desired_frame
= 0;
1185 int preempt_count
= baud_rate
/ 2400 + 1;
1186 extern input_pending
;
1187 #ifdef HAVE_WINDOW_SYSTEM
1188 register int downto
, leftmost
;
1191 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
1192 calculate_costs (f
);
1194 if (preempt_count
<= 0)
1197 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1199 detect_input_pending ();
1200 if (input_pending
&& !force
)
1208 if (!line_ins_del_ok
)
1209 inhibit_hairy_id
= 1;
1211 /* These are separate to avoid a possible bug in the AIX C compiler. */
1212 current_frame
= FRAME_CURRENT_GLYPHS (f
);
1213 desired_frame
= FRAME_DESIRED_GLYPHS (f
);
1215 /* See if any of the desired lines are enabled; don't compute for
1216 i/d line if just want cursor motion. */
1217 for (i
= 0; i
< FRAME_HEIGHT (f
); i
++)
1218 if (desired_frame
->enable
[i
])
1221 /* Try doing i/d line, if not yet inhibited. */
1222 if (!inhibit_hairy_id
&& i
< FRAME_HEIGHT (f
))
1223 force
|= scrolling (f
);
1225 /* Update the individual lines as needed. Do bottom line first. */
1227 if (desired_frame
->enable
[FRAME_HEIGHT (f
) - 1])
1228 update_line (f
, FRAME_HEIGHT (f
) - 1);
1230 #ifdef HAVE_WINDOW_SYSTEM
1231 if (FRAME_WINDOW_P (f
))
1233 leftmost
= downto
= FRAME_INTERNAL_BORDER_WIDTH (f
);
1234 if (desired_frame
->enable
[0])
1236 current_frame
->top_left_x
[FRAME_HEIGHT (f
) - 1] = leftmost
;
1237 current_frame
->top_left_y
[FRAME_HEIGHT (f
) - 1]
1238 = PIXEL_HEIGHT (f
) - FRAME_INTERNAL_BORDER_WIDTH (f
)
1239 - current_frame
->pix_height
[FRAME_HEIGHT (f
) - 1];
1240 current_frame
->top_left_x
[0] = leftmost
;
1241 current_frame
->top_left_y
[0] = downto
;
1244 #endif /* HAVE_WINDOW_SYSTEM */
1246 /* Now update the rest of the lines. */
1247 for (i
= 0; i
< FRAME_HEIGHT (f
) - 1 && (force
|| !input_pending
); i
++)
1249 if (desired_frame
->enable
[i
])
1251 if (FRAME_TERMCAP_P (f
))
1253 /* Flush out every so many lines.
1254 Also flush out if likely to have more than 1k buffered
1255 otherwise. I'm told that some telnet connections get
1256 really screwed by more than 1k output at once. */
1257 int outq
= PENDING_OUTPUT_COUNT (stdout
);
1259 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
1262 if (preempt_count
== 1)
1264 #ifdef EMACS_OUTQSIZE
1265 if (EMACS_OUTQSIZE (0, &outq
) < 0)
1266 /* Probably not a tty. Ignore the error and reset
1267 * the outq count. */
1268 outq
= PENDING_OUTPUT_COUNT (stdout
);
1271 if (baud_rate
<= outq
&& baud_rate
> 0)
1272 sleep (outq
/ baud_rate
);
1275 if ((i
- 1) % preempt_count
== 0)
1276 detect_input_pending ();
1280 #ifdef HAVE_WINDOW_SYSTEM
1281 if (FRAME_WINDOW_P (f
))
1283 current_frame
->top_left_y
[i
] = downto
;
1284 current_frame
->top_left_x
[i
] = leftmost
;
1286 #endif /* HAVE_WINDOW_SYSTEM */
1289 #ifdef HAVE_WINDOW_SYSTEM
1290 if (FRAME_WINDOW_P (f
))
1291 downto
+= current_frame
->pix_height
[i
];
1292 #endif /* HAVE_WINDOW_SYSTEM */
1294 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
1296 /* Now just clean up termcap drivers and set cursor, etc. */
1299 if ((cursor_in_echo_area
1300 /* If we are showing a message instead of the minibuffer,
1301 show the cursor for the message instead of for the
1302 (now hidden) minibuffer contents. */
1303 || (EQ (minibuf_window
, selected_window
)
1304 && EQ (minibuf_window
, echo_area_window
)
1305 && echo_area_glyphs
!= 0))
1306 /* These cases apply only to the frame that contains
1307 the active minibuffer window. */
1308 && FRAME_HAS_MINIBUF_P (f
)
1309 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
1311 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
1314 if (cursor_in_echo_area
< 0)
1321 /* If the minibuffer is several lines high, find the last
1322 line that has any text on it. */
1323 row
= FRAME_HEIGHT (f
);
1327 if (current_frame
->enable
[row
])
1328 col
= current_frame
->used
[row
];
1332 while (row
> top
&& col
== 0);
1334 if (col
>= FRAME_WIDTH (f
))
1337 if (row
< FRAME_HEIGHT (f
) - 1)
1342 cursor_to (row
, col
);
1345 cursor_to (FRAME_CURSOR_Y (f
),
1346 max (min (FRAME_CURSOR_X (f
),
1347 FRAME_WINDOW_WIDTH (f
) - 1), 0));
1353 fflush (termscript
);
1356 /* Here if output is preempted because input is detected. */
1359 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1360 display_completed
= !pause
;
1362 bzero (FRAME_DESIRED_GLYPHS (f
)->enable
, FRAME_HEIGHT (f
));
1366 /* Called when about to quit, to check for doing so
1367 at an improper time. */
1373 if (FRAME_DESIRED_GLYPHS (selected_frame
) == 0)
1375 if (FRAME_DESIRED_GLYPHS (selected_frame
)->enable
[0])
1377 if (FRAME_DESIRED_GLYPHS (selected_frame
)->enable
[FRAME_HEIGHT (selected_frame
) - 1])
1382 /* Decide what insert/delete line to do, and do it */
1384 extern void scrolling_1 ();
1389 int unchanged_at_top
, unchanged_at_bottom
;
1392 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1393 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1394 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1395 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1397 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
1398 register struct frame_glyphs
*current_frame
= FRAME_CURRENT_GLYPHS (frame
);
1399 register struct frame_glyphs
*desired_frame
= FRAME_DESIRED_GLYPHS (frame
);
1401 /* Compute hash codes of all the lines.
1402 Also calculate number of changed lines,
1403 number of unchanged lines at the beginning,
1404 and number of unchanged lines at the end. */
1407 unchanged_at_top
= 0;
1408 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
1409 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
1411 /* Give up on this scrolling if some old lines are not enabled. */
1412 if (!current_frame
->enable
[i
])
1414 old_hash
[i
] = line_hash_code (current_frame
, i
);
1415 if (! desired_frame
->enable
[i
])
1416 new_hash
[i
] = old_hash
[i
];
1418 new_hash
[i
] = line_hash_code (desired_frame
, i
);
1420 if (old_hash
[i
] != new_hash
[i
])
1423 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
1425 else if (i
== unchanged_at_top
)
1427 draw_cost
[i
] = line_draw_cost (desired_frame
, i
);
1428 old_draw_cost
[i
] = line_draw_cost (current_frame
, i
);
1431 /* If changed lines are few, don't allow preemption, don't scroll. */
1432 if (!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400
1433 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
1436 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
1437 - unchanged_at_bottom
);
1439 if (scroll_region_ok
)
1440 free_at_end_vpos
-= unchanged_at_bottom
;
1441 else if (memory_below_frame
)
1442 free_at_end_vpos
= -1;
1444 /* If large window, fast terminal and few lines in common between
1445 current frame and desired frame, don't bother with i/d calc. */
1446 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
1448 10 * scrolling_max_lines_saved (unchanged_at_top
,
1449 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
1450 old_hash
, new_hash
, draw_cost
)))
1453 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
1454 draw_cost
+ unchanged_at_top
- 1,
1455 old_draw_cost
+ unchanged_at_top
- 1,
1456 old_hash
+ unchanged_at_top
- 1,
1457 new_hash
+ unchanged_at_top
- 1,
1458 free_at_end_vpos
- unchanged_at_top
);
1463 /* Return the offset in its buffer of the character at location col, line
1464 in the given window. */
1466 buffer_posn_from_coords (window
, col
, line
)
1467 struct window
*window
;
1470 int hscroll
= XINT (window
->hscroll
);
1471 int window_left
= WINDOW_LEFT_MARGIN (window
);
1473 /* The actual width of the window is window->width less one for the
1474 DISP_CONTINUE_GLYPH, and less one if it's not the rightmost
1476 int window_width
= window_internal_width (window
) - 1;
1478 int startp
= marker_position (window
->start
);
1480 /* Since compute_motion will only operate on the current buffer,
1481 we need to save the old one and restore it when we're done. */
1482 struct buffer
*old_current_buffer
= current_buffer
;
1483 struct position
*posn
;
1485 current_buffer
= XBUFFER (window
->buffer
);
1487 /* We can't get a correct result in this case,
1488 but at least prevent compute_motion from crashing. */
1492 /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME
1493 (window->frame))->bufp to avoid scanning from the very top of
1494 the window, but it isn't maintained correctly, and I'm not even
1495 sure I will keep it. */
1496 posn
= compute_motion (startp
, 0,
1497 ((window
== XWINDOW (minibuf_window
) && startp
== BEG
1498 ? minibuf_prompt_width
: 0)
1499 + (hscroll
? 1 - hscroll
: 0)),
1502 window_width
, hscroll
, 0, window
);
1504 current_buffer
= old_current_buffer
;
1506 /* compute_motion considers frame points past the end of a line
1507 to be *after* the newline, i.e. at the start of the next line.
1508 This is reasonable, but not really what we want. So if the
1509 result is on a line below LINE, back it up one character. */
1510 if (posn
->vpos
> line
)
1511 return posn
->bufpos
- 1;
1513 return posn
->bufpos
;
1520 register GLYPH
*p
= r
;
1521 while (*p
++ == SPACEGLYPH
);
1526 count_match (str1
, str2
)
1529 register GLYPH
*p1
= str1
;
1530 register GLYPH
*p2
= str2
;
1531 while (*p1
++ == *p2
++);
1532 return p1
- str1
- 1;
1535 /* Char insertion/deletion cost vector, from term.c */
1536 extern int *char_ins_del_vector
;
1538 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))])
1541 update_line (frame
, vpos
)
1542 register FRAME_PTR frame
;
1545 register GLYPH
*obody
, *nbody
, *op1
, *op2
, *np1
, *temp
;
1548 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
1550 register struct frame_glyphs
*current_frame
1551 = FRAME_CURRENT_GLYPHS (frame
);
1552 register struct frame_glyphs
*desired_frame
1553 = FRAME_DESIRED_GLYPHS (frame
);
1555 if (desired_frame
->highlight
[vpos
]
1556 != (current_frame
->enable
[vpos
] && current_frame
->highlight
[vpos
]))
1558 change_line_highlight (desired_frame
->highlight
[vpos
], vpos
,
1559 (current_frame
->enable
[vpos
] ?
1560 current_frame
->used
[vpos
] : 0));
1561 current_frame
->enable
[vpos
] = 0;
1564 reassert_line_highlight (desired_frame
->highlight
[vpos
], vpos
);
1566 if (! current_frame
->enable
[vpos
])
1572 obody
= current_frame
->glyphs
[vpos
];
1573 olen
= current_frame
->used
[vpos
];
1574 if (! current_frame
->highlight
[vpos
])
1576 if (!must_write_spaces
)
1577 while (olen
> 0 && obody
[olen
- 1] == SPACEGLYPH
)
1582 /* For an inverse-video line, remember we gave it
1583 spaces all the way to the frame edge
1584 so that the reverse video extends all the way across. */
1586 while (olen
< FRAME_WIDTH (frame
) - 1)
1587 obody
[olen
++] = SPACEGLYPH
;
1591 /* One way or another, this will enable the line being updated. */
1592 current_frame
->enable
[vpos
] = 1;
1593 current_frame
->used
[vpos
] = desired_frame
->used
[vpos
];
1594 current_frame
->highlight
[vpos
] = desired_frame
->highlight
[vpos
];
1595 current_frame
->bufp
[vpos
] = desired_frame
->bufp
[vpos
];
1597 #ifdef HAVE_WINDOW_SYSTEM
1598 if (FRAME_WINDOW_P (frame
))
1600 current_frame
->pix_width
[vpos
]
1601 = current_frame
->used
[vpos
]
1602 * FONT_WIDTH (FRAME_FONT (frame
));
1603 current_frame
->pix_height
[vpos
]
1604 = FRAME_LINE_HEIGHT (frame
);
1606 #endif /* HAVE_WINDOW_SYSTEM */
1608 if (!desired_frame
->enable
[vpos
])
1614 nbody
= desired_frame
->glyphs
[vpos
];
1615 nlen
= desired_frame
->used
[vpos
];
1617 /* Pretend trailing spaces are not there at all,
1618 unless for one reason or another we must write all spaces. */
1619 if (! desired_frame
->highlight
[vpos
])
1621 if (!must_write_spaces
)
1622 /* We know that the previous character byte contains 0. */
1623 while (nbody
[nlen
- 1] == SPACEGLYPH
)
1628 /* For an inverse-video line, give it extra trailing spaces
1629 all the way to the frame edge
1630 so that the reverse video extends all the way across. */
1632 while (nlen
< FRAME_WIDTH (frame
) - 1)
1633 nbody
[nlen
++] = SPACEGLYPH
;
1636 /* If there's no i/d char, quickly do the best we can without it. */
1637 if (!char_ins_del_ok
)
1642 if (FRAME_X_P (frame
))
1644 /* Under X, erase everything we are going to rewrite,
1645 and rewrite everything from the first char that's changed.
1646 This is part of supporting fonts like Courier
1647 whose chars can overlap outside the char width. */
1648 for (i
= 0; i
< nlen
; i
++)
1649 if (i
>= olen
|| nbody
[i
] != obody
[i
])
1652 cursor_to (vpos
, i
);
1654 clear_end_of_line (olen
);
1655 write_glyphs (nbody
+ i
, nlen
- i
);
1660 for (i
= 0; i
< nlen
; i
++)
1662 if (i
>= olen
|| nbody
[i
] != obody
[i
]) /* A non-matching char. */
1664 cursor_to (vpos
, i
);
1665 for (j
= 1; (i
+ j
< nlen
&&
1666 (i
+ j
>= olen
|| nbody
[i
+j
] != obody
[i
+j
]));
1669 /* Output this run of non-matching chars. */
1670 write_glyphs (nbody
+ i
, j
);
1673 /* Now find the next non-match. */
1677 /* Clear the rest of the line, or the non-clear part of it. */
1680 cursor_to (vpos
, nlen
);
1681 clear_end_of_line (olen
);
1684 /* Exchange contents between current_frame and new_frame. */
1685 temp
= desired_frame
->glyphs
[vpos
];
1686 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1687 current_frame
->glyphs
[vpos
] = temp
;
1689 /* Exchange charstarts between current_frame and new_frame. */
1690 temp1
= desired_frame
->charstarts
[vpos
];
1691 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1692 current_frame
->charstarts
[vpos
] = temp1
;
1699 nsp
= (must_write_spaces
|| desired_frame
->highlight
[vpos
])
1700 ? 0 : count_blanks (nbody
);
1703 cursor_to (vpos
, nsp
);
1704 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
1707 /* Exchange contents between current_frame and new_frame. */
1708 temp
= desired_frame
->glyphs
[vpos
];
1709 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1710 current_frame
->glyphs
[vpos
] = temp
;
1712 /* Exchange charstarts between current_frame and new_frame. */
1713 temp1
= desired_frame
->charstarts
[vpos
];
1714 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1715 current_frame
->charstarts
[vpos
] = temp1
;
1724 /* Compute number of leading blanks in old and new contents. */
1725 osp
= count_blanks (obody
);
1726 if (!desired_frame
->highlight
[vpos
])
1727 nsp
= count_blanks (nbody
);
1731 /* Compute number of matching chars starting with first nonblank. */
1732 begmatch
= count_match (obody
+ osp
, nbody
+ nsp
);
1734 /* Spaces in new match implicit space past the end of old. */
1735 /* A bug causing this to be a no-op was fixed in 18.29. */
1736 if (!must_write_spaces
&& osp
+ begmatch
== olen
)
1739 while (np1
[begmatch
] == SPACEGLYPH
)
1743 /* Avoid doing insert/delete char
1744 just cause number of leading spaces differs
1745 when the following text does not match. */
1746 if (begmatch
== 0 && osp
!= nsp
)
1747 osp
= nsp
= min (osp
, nsp
);
1749 /* Find matching characters at end of line */
1752 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
1753 while (op1
> op2
&& op1
[-1] == np1
[-1])
1758 endmatch
= obody
+ olen
- op1
;
1760 /* Put correct value back in nbody[nlen].
1761 This is important because direct_output_for_insert
1762 can write into the line at a later point.
1763 If this screws up the zero at the end of the line, re-establish it. */
1767 /* tem gets the distance to insert or delete.
1768 endmatch is how many characters we save by doing so.
1771 tem
= (nlen
- nsp
) - (olen
- osp
);
1773 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (frame
)[tem
]))
1776 /* nsp - osp is the distance to insert or delete.
1777 If that is nonzero, begmatch is known to be nonzero also.
1778 begmatch + endmatch is how much we save by doing the ins/del.
1782 && (!char_ins_del_ok
1783 || begmatch
+ endmatch
<= char_ins_del_cost (frame
)[nsp
- osp
]))
1787 osp
= nsp
= min (osp
, nsp
);
1790 /* Now go through the line, inserting, writing and
1791 deleting as appropriate. */
1795 cursor_to (vpos
, nsp
);
1796 delete_glyphs (osp
- nsp
);
1800 /* If going to delete chars later in line
1801 and insert earlier in the line,
1802 must delete first to avoid losing data in the insert */
1803 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
1805 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
1806 delete_glyphs (olen
+ nsp
- osp
- nlen
);
1807 olen
= nlen
- (nsp
- osp
);
1809 cursor_to (vpos
, osp
);
1810 insert_glyphs ((char *)0, nsp
- osp
);
1814 tem
= nsp
+ begmatch
+ endmatch
;
1815 if (nlen
!= tem
|| olen
!= tem
)
1817 cursor_to (vpos
, nsp
+ begmatch
);
1818 if (!endmatch
|| nlen
== olen
)
1820 /* If new text being written reaches right margin,
1821 there is no need to do clear-to-eol at the end.
1822 (and it would not be safe, since cursor is not
1823 going to be "at the margin" after the text is done) */
1824 if (nlen
== FRAME_WIDTH (frame
))
1826 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1830 /* the following code loses disastrously if tem == nlen.
1831 Rather than trying to fix that case, I am trying the simpler
1832 solution found above. */
1834 /* If the text reaches to the right margin,
1835 it will lose one way or another (depending on AutoWrap)
1836 to clear to end of line after outputting all the text.
1837 So pause with one character to go and clear the line then. */
1838 if (nlen
== FRAME_WIDTH (frame
) && fast_clear_end_of_line
&& olen
> nlen
)
1840 /* endmatch must be zero, and tem must equal nsp + begmatch */
1841 write_glyphs (nbody
+ tem
, nlen
- tem
- 1);
1842 clear_end_of_line (olen
);
1843 olen
= 0; /* Don't let it be cleared again later */
1844 write_glyphs (nbody
+ nlen
- 1, 1);
1847 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1848 #endif /* OBSOLETE */
1851 else if (nlen
> olen
)
1853 write_glyphs (nbody
+ nsp
+ begmatch
, olen
- tem
);
1854 insert_glyphs (nbody
+ nsp
+ begmatch
+ olen
- tem
, nlen
- olen
);
1857 else if (olen
> nlen
)
1859 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1860 delete_glyphs (olen
- nlen
);
1866 /* If any unerased characters remain after the new line, erase them. */
1869 cursor_to (vpos
, nlen
);
1870 clear_end_of_line (olen
);
1873 /* Exchange contents between current_frame and new_frame. */
1874 temp
= desired_frame
->glyphs
[vpos
];
1875 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1876 current_frame
->glyphs
[vpos
] = temp
;
1878 /* Exchange charstarts between current_frame and new_frame. */
1879 temp1
= desired_frame
->charstarts
[vpos
];
1880 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1881 current_frame
->charstarts
[vpos
] = temp1
;
1884 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
1885 session's frames, frame names, buffers, buffer-read-only flags, and
1886 buffer-modified-flags, and a trailing sentinel (so we don't need to
1887 add length checks). */
1888 static Lisp_Object frame_and_buffer_state
;
1890 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
1891 Sframe_or_buffer_changed_p
, 0, 0, 0,
1892 "Return non-nil if the frame and buffer state appears to have changed.\n\
1893 The state variable is an internal vector containing all frames and buffers,\n\
1894 aside from buffers whose names start with space,\n\
1895 along with the buffers' read-only and modified flags, which allows a fast\n\
1896 check to see whether the menu bars might need to be recomputed.\n\
1897 If this function returns non-nil, it updates the internal vector to reflect\n\
1898 the current state.\n")
1901 Lisp_Object tail
, frame
, buf
;
1905 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
1906 FOR_EACH_FRAME (tail
, frame
)
1908 if (!EQ (*vecp
++, frame
))
1910 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
1913 /* Check that the buffer info matches.
1914 No need to test for the end of the vector
1915 because the last element of the vector is lambda
1916 and that will always cause a mismatch. */
1917 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1919 buf
= XCONS (XCONS (tail
)->car
)->cdr
;
1920 /* Ignore buffers that aren't included in buffer lists. */
1921 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1923 if (!EQ (*vecp
++, buf
))
1925 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
1927 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
1930 /* Detect deletion of a buffer at the end of the list. */
1931 if (*vecp
== Qlambda
)
1934 /* Start with 1 so there is room for at least one lambda at the end. */
1936 FOR_EACH_FRAME (tail
, frame
)
1938 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1940 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
1941 if (n
> XVECTOR (frame_and_buffer_state
)->size
1942 || n
+ 20 < XVECTOR (frame_and_buffer_state
)->size
/ 2)
1943 /* Add 20 extra so we grow it less often. */
1944 frame_and_buffer_state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
1945 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
1946 FOR_EACH_FRAME (tail
, frame
)
1949 *vecp
++ = XFRAME (frame
)->name
;
1951 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1953 buf
= XCONS (XCONS (tail
)->car
)->cdr
;
1954 /* Ignore buffers that aren't included in buffer lists. */
1955 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1958 *vecp
++ = XBUFFER (buf
)->read_only
;
1959 *vecp
++ = Fbuffer_modified_p (buf
);
1961 /* Fill up the vector with lambdas (always at least one). */
1963 while (vecp
- XVECTOR (frame_and_buffer_state
)->contents
1964 < XVECTOR (frame_and_buffer_state
)->size
)
1966 /* Make sure we didn't overflow the vector. */
1967 if (vecp
- XVECTOR (frame_and_buffer_state
)->contents
1968 > XVECTOR (frame_and_buffer_state
)->size
)
1973 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
1974 1, 1, "FOpen termscript file: ",
1975 "Start writing all terminal output to FILE as well as the terminal.\n\
1976 FILE = nil means just close any termscript file currently open.")
1980 if (termscript
!= 0) fclose (termscript
);
1985 file
= Fexpand_file_name (file
, Qnil
);
1986 termscript
= fopen (XSTRING (file
)->data
, "w");
1987 if (termscript
== 0)
1988 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
1996 window_change_signal (signalnum
) /* If we don't have an argument, */
1997 int signalnum
; /* some compilers complain in signal calls. */
2001 int old_errno
= errno
;
2003 get_frame_size (&width
, &height
);
2005 /* The frame size change obviously applies to a termcap-controlled
2006 frame. Find such a frame in the list, and assume it's the only
2007 one (since the redisplay code always writes to stdout, not a
2008 FILE * specified in the frame structure). Record the new size,
2009 but don't reallocate the data structures now. Let that be done
2010 later outside of the signal handler. */
2013 Lisp_Object tail
, frame
;
2015 FOR_EACH_FRAME (tail
, frame
)
2017 if (FRAME_TERMCAP_P (XFRAME (frame
)))
2019 change_frame_size (XFRAME (frame
), height
, width
, 0, 1);
2025 signal (SIGWINCH
, window_change_signal
);
2028 #endif /* SIGWINCH */
2031 /* Do any change in frame size that was requested by a signal. */
2033 do_pending_window_change ()
2035 /* If window_change_signal should have run before, run it now. */
2036 while (delayed_size_change
)
2038 Lisp_Object tail
, frame
;
2040 delayed_size_change
= 0;
2042 FOR_EACH_FRAME (tail
, frame
)
2044 FRAME_PTR f
= XFRAME (frame
);
2046 int height
= FRAME_NEW_HEIGHT (f
);
2047 int width
= FRAME_NEW_WIDTH (f
);
2049 if (height
!= 0 || width
!= 0)
2050 change_frame_size (f
, height
, width
, 0, 0);
2056 /* Change the frame height and/or width. Values may be given as zero to
2057 indicate no change is to take place.
2059 If DELAY is non-zero, then assume we're being called from a signal
2060 handler, and queue the change for later - perhaps the next
2061 redisplay. Since this tries to resize windows, we can't call it
2062 from a signal handler. */
2064 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
)
2065 register FRAME_PTR f
;
2066 int newheight
, newwidth
, pretend
;
2068 Lisp_Object tail
, frame
;
2069 if (! FRAME_WINDOW_P (f
))
2071 /* When using termcap, or on MS-DOS, all frames use
2072 the same screen, so a change in size affects all frames. */
2073 FOR_EACH_FRAME (tail
, frame
)
2074 if (! FRAME_WINDOW_P (XFRAME (frame
)))
2075 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
2079 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
);
2083 change_frame_size_1 (frame
, newheight
, newwidth
, pretend
, delay
)
2084 register FRAME_PTR frame
;
2085 int newheight
, newwidth
, pretend
, delay
;
2087 int new_frame_window_width
;
2088 /* If we can't deal with the change now, queue it for later. */
2091 FRAME_NEW_HEIGHT (frame
) = newheight
;
2092 FRAME_NEW_WIDTH (frame
) = newwidth
;
2093 delayed_size_change
= 1;
2097 /* This size-change overrides any pending one for this frame. */
2098 FRAME_NEW_HEIGHT (frame
) = 0;
2099 FRAME_NEW_WIDTH (frame
) = 0;
2101 /* If an argument is zero, set it to the current value. */
2103 newheight
= FRAME_HEIGHT (frame
);
2105 newwidth
= FRAME_WIDTH (frame
);
2106 new_frame_window_width
= FRAME_WINDOW_WIDTH_ARG (frame
, newwidth
);
2108 /* Round up to the smallest acceptable size. */
2109 check_frame_size (frame
, &newheight
, &newwidth
);
2111 /* If we're not changing the frame size, quit now. */
2112 if (newheight
== FRAME_HEIGHT (frame
)
2113 && new_frame_window_width
== FRAME_WINDOW_WIDTH (frame
))
2119 /* We only can set screen dimensions to certain values supported
2120 by our video hardware. Try to find the smallest size greater
2121 or equal to the requested dimensions. */
2122 dos_set_window_size (&newheight
, &newwidth
);
2125 if (newheight
!= FRAME_HEIGHT (frame
))
2127 if (FRAME_HAS_MINIBUF_P (frame
)
2128 && ! FRAME_MINIBUF_ONLY_P (frame
))
2130 /* Frame has both root and minibuffer. */
2131 set_window_height (FRAME_ROOT_WINDOW (frame
),
2132 newheight
- 1 - FRAME_MENU_BAR_LINES (frame
), 0);
2133 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame
))->top
,
2135 set_window_height (FRAME_MINIBUF_WINDOW (frame
), 1, 0);
2138 /* Frame has just one top-level window. */
2139 set_window_height (FRAME_ROOT_WINDOW (frame
),
2140 newheight
- FRAME_MENU_BAR_LINES (frame
), 0);
2142 if (FRAME_TERMCAP_P (frame
) && !pretend
)
2143 FrameRows
= newheight
;
2146 if (frame
->output_method
== output_termcap
)
2148 frame_height
= newheight
;
2150 FrameRows
= newheight
;
2155 if (new_frame_window_width
!= FRAME_WINDOW_WIDTH (frame
))
2157 set_window_width (FRAME_ROOT_WINDOW (frame
), new_frame_window_width
, 0);
2158 if (FRAME_HAS_MINIBUF_P (frame
))
2159 set_window_width (FRAME_MINIBUF_WINDOW (frame
), new_frame_window_width
, 0);
2161 if (FRAME_TERMCAP_P (frame
) && !pretend
)
2162 FrameCols
= newwidth
;
2164 if (frame
->output_method
== output_termcap
)
2166 frame_width
= newwidth
;
2168 FrameCols
= newwidth
;
2173 FRAME_HEIGHT (frame
) = newheight
;
2174 SET_FRAME_WIDTH (frame
, newwidth
);
2176 if (FRAME_CURSOR_X (frame
) >= FRAME_WIDTH (frame
))
2177 FRAME_CURSOR_X (frame
) = FRAME_WIDTH (frame
) - 1;
2178 if (FRAME_CURSOR_Y (frame
) >= FRAME_HEIGHT (frame
))
2179 FRAME_CURSOR_Y (frame
) = FRAME_HEIGHT (frame
) - 1;
2181 remake_frame_glyphs (frame
);
2182 calculate_costs (frame
);
2187 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
2188 Ssend_string_to_terminal
, 1, 1, 0,
2189 "Send STRING to the terminal without alteration.\n\
2190 Control characters in STRING will have terminal-dependent effects.")
2194 CHECK_STRING (string
, 0);
2195 fwrite (XSTRING (string
)->data
, 1, XSTRING (string
)->size
, stdout
);
2199 fwrite (XSTRING (string
)->data
, 1, XSTRING (string
)->size
, termscript
);
2200 fflush (termscript
);
2205 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
2206 "Beep, or flash the screen.\n\
2207 Also, unless an argument is given,\n\
2208 terminate any keyboard macro currently executing.")
2230 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
2231 error ("Keyboard macro terminated by a command ringing the bell");
2237 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
2238 "Pause, without updating display, for SECONDS seconds.\n\
2239 SECONDS may be a floating-point value, meaning that you can wait for a\n\
2240 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
2241 additional wait period, in milliseconds; this may be useful if your\n\
2242 Emacs was built without floating point support.\n\
2243 \(Not all operating systems support waiting for a fraction of a second.)")
2244 (seconds
, milliseconds
)
2245 Lisp_Object seconds
, milliseconds
;
2249 if (NILP (milliseconds
))
2250 XSETINT (milliseconds
, 0);
2252 CHECK_NUMBER (milliseconds
, 1);
2253 usec
= XINT (milliseconds
) * 1000;
2255 #ifdef LISP_FLOAT_TYPE
2257 double duration
= extract_float (seconds
);
2258 sec
= (int) duration
;
2259 usec
+= (duration
- sec
) * 1000000;
2262 CHECK_NUMBER (seconds
, 0);
2263 sec
= XINT (seconds
);
2266 #ifndef EMACS_HAS_USECS
2267 if (sec
== 0 && usec
!= 0)
2268 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
2271 /* Assure that 0 <= usec < 1000000. */
2274 /* We can't rely on the rounding being correct if user is negative. */
2275 if (-1000000 < usec
)
2276 sec
--, usec
+= 1000000;
2278 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
2281 sec
+= usec
/ 1000000, usec
%= 1000000;
2283 if (sec
< 0 || (sec
== 0 && usec
== 0))
2289 XSETFASTINT (zero
, 0);
2290 wait_reading_process_input (sec
, usec
, zero
, 0);
2293 /* We should always have wait_reading_process_input; we have a dummy
2294 implementation for systems which don't support subprocesses. */
2296 /* No wait_reading_process_input */
2303 /* The reason this is done this way
2304 (rather than defined (H_S) && defined (H_T))
2305 is because the VMS preprocessor doesn't grok `defined' */
2307 EMACS_GET_TIME (end_time
);
2308 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
2309 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2313 EMACS_GET_TIME (timeout
);
2314 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2315 if (EMACS_TIME_NEG_P (timeout
)
2316 || !select (1, 0, 0, 0, &timeout
))
2319 #else /* not HAVE_SELECT */
2321 #endif /* HAVE_SELECT */
2322 #endif /* not VMS */
2325 #endif /* no subprocesses */
2330 /* This is just like wait_reading_process_input, except that
2331 it does the redisplay.
2333 It's also much like Fsit_for, except that it can be used for
2334 waiting for input as well. */
2337 sit_for (sec
, usec
, reading
, display
)
2338 int sec
, usec
, reading
, display
;
2340 Lisp_Object read_kbd
;
2342 swallow_events (display
);
2344 if (detect_input_pending_run_timers (display
))
2348 redisplay_preserve_echo_area ();
2350 if (sec
== 0 && usec
== 0)
2357 XSETINT (read_kbd
, reading
? -1 : 1);
2358 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
2361 /* wait_reading_process_input should always be available now; it is
2362 simulated in a simple way on systems that don't support
2365 /* No wait_reading_process_input available. */
2371 input_wait_timeout (XINT (arg
));
2373 #ifndef HAVE_TIMEVAL
2375 select (1, &waitchannels
, 0, 0, &timeout_sec
);
2376 #else /* HAVE_TIMEVAL */
2377 timeout
.tv_sec
= sec
;
2378 timeout
.tv_usec
= usec
;
2379 select (1, &waitchannels
, 0, 0, &timeout
);
2380 #endif /* HAVE_TIMEVAL */
2381 #endif /* not VMS */
2386 return detect_input_pending () ? Qnil
: Qt
;
2389 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
2390 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
2391 SECONDS may be a floating-point value, meaning that you can wait for a\n\
2392 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
2393 additional wait period, in milliseconds; this may be useful if your\n\
2394 Emacs was built without floating point support.\n\
2395 \(Not all operating systems support waiting for a fraction of a second.)\n\
2396 Optional third arg NODISP non-nil means don't redisplay, just wait for input.\n\
2397 Redisplay is preempted as always if input arrives, and does not happen\n\
2398 if input is available before it starts.\n\
2399 Value is t if waited the full time with no input arriving.")
2400 (seconds
, milliseconds
, nodisp
)
2401 Lisp_Object seconds
, milliseconds
, nodisp
;
2405 if (NILP (milliseconds
))
2406 XSETINT (milliseconds
, 0);
2408 CHECK_NUMBER (milliseconds
, 1);
2409 usec
= XINT (milliseconds
) * 1000;
2411 #ifdef LISP_FLOAT_TYPE
2413 double duration
= extract_float (seconds
);
2414 sec
= (int) duration
;
2415 usec
+= (duration
- sec
) * 1000000;
2418 CHECK_NUMBER (seconds
, 0);
2419 sec
= XINT (seconds
);
2422 #ifndef EMACS_HAS_USECS
2423 if (usec
!= 0 && sec
== 0)
2424 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
2427 return sit_for (sec
, usec
, 0, NILP (nodisp
));
2430 char *terminal_type
;
2432 /* Initialization done when Emacs fork is started, before doing stty. */
2433 /* Determine terminal type and set terminal_driver */
2434 /* Then invoke its decoding routine to set up variables
2435 in the terminal package */
2439 #ifdef HAVE_X_WINDOWS
2440 extern int display_arg
;
2445 cursor_in_echo_area
= 0;
2446 terminal_type
= (char *) 0;
2448 /* Now is the time to initialize this; it's used by init_sys_modes
2450 Vwindow_system
= Qnil
;
2452 /* If the user wants to use a window system, we shouldn't bother
2453 initializing the terminal. This is especially important when the
2454 terminal is so dumb that emacs gives up before and doesn't bother
2455 using the window system.
2457 If the DISPLAY environment variable is set and nonempty,
2458 try to use X, and die with an error message if that doesn't work. */
2460 #ifdef HAVE_X_WINDOWS
2465 display
= getenv ("DECW$DISPLAY");
2467 display
= getenv ("DISPLAY");
2470 display_arg
= (display
!= 0 && *display
!= 0);
2473 if (!inhibit_window_system
&& display_arg
)
2475 Vwindow_system
= intern ("x");
2477 Vwindow_system_version
= make_number (11);
2479 Vwindow_system_version
= make_number (10);
2481 #if defined (LINUX) && defined (HAVE_LIBNCURSES)
2482 /* In some versions of ncurses,
2483 tputs crashes if we have not called tgetent.
2485 { char b
[2044]; tgetent (b
, "xterm");}
2489 #endif /* HAVE_X_WINDOWS */
2492 if (!inhibit_window_system
)
2494 Vwindow_system
= intern ("win32");
2495 Vwindow_system_version
= make_number (1);
2498 #endif /* HAVE_NTGUI */
2500 /* If no window system has been specified, try to use the terminal. */
2503 fprintf (stderr
, "emacs: standard input is not a tty\n");
2507 /* Look at the TERM variable */
2508 terminal_type
= (char *) getenv ("TERM");
2512 fprintf (stderr
, "Please specify your terminal type.\n\
2513 For types defined in VMS, use set term /device=TYPE.\n\
2514 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
2515 \(The quotation marks are necessary since terminal types are lower case.)\n");
2517 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
2523 /* VMS DCL tends to upcase things, so downcase term type.
2524 Hardly any uppercase letters in terminal types; should be none. */
2526 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
2529 strcpy (new, terminal_type
);
2531 for (p
= new; *p
; p
++)
2535 terminal_type
= new;
2539 term_init (terminal_type
);
2541 remake_frame_glyphs (selected_frame
);
2542 calculate_costs (selected_frame
);
2544 /* X and Y coordinates of the cursor between updates. */
2545 FRAME_CURSOR_X (selected_frame
) = 0;
2546 FRAME_CURSOR_Y (selected_frame
) = 0;
2551 #endif /* CANNOT_DUMP */
2552 signal (SIGWINCH
, window_change_signal
);
2553 #endif /* SIGWINCH */
2558 defsubr (&Sredraw_frame
);
2559 defsubr (&Sredraw_display
);
2560 defsubr (&Sframe_or_buffer_changed_p
);
2561 defsubr (&Sopen_termscript
);
2563 defsubr (&Ssit_for
);
2564 defsubr (&Ssleep_for
);
2565 defsubr (&Ssend_string_to_terminal
);
2567 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
2568 staticpro (&frame_and_buffer_state
);
2570 Qdisplay_table
= intern ("display-table");
2571 staticpro (&Qdisplay_table
);
2573 DEFVAR_INT ("baud-rate", &baud_rate
,
2574 "*The output baud rate of the terminal.\n\
2575 On most systems, changing this value will affect the amount of padding\n\
2576 and the other strategic decisions made during redisplay.");
2577 DEFVAR_BOOL ("inverse-video", &inverse_video
,
2578 "*Non-nil means invert the entire frame display.\n\
2579 This means everything is in inverse video which otherwise would not be.");
2580 DEFVAR_BOOL ("visible-bell", &visible_bell
,
2581 "*Non-nil means try to flash the frame to represent a bell.");
2582 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
2583 "*Non-nil means no need to redraw entire frame after suspending.\n\
2584 A non-nil value is useful if the terminal can automatically preserve\n\
2585 Emacs's frame display when you reenter Emacs.\n\
2586 It is up to you to set this variable if your terminal can do that.");
2587 DEFVAR_LISP ("window-system", &Vwindow_system
,
2588 "A symbol naming the window-system under which Emacs is running\n\
2589 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
2590 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
2591 "The version number of the window system in use.\n\
2592 For X windows, this is 10 or 11.");
2593 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
2594 "Non-nil means put cursor in minibuffer, at end of any message there.");
2595 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
2596 "Table defining how to output a glyph code to the frame.\n\
2597 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
2598 Each element can be:\n\
2599 integer: a glyph code which this glyph is an alias for.\n\
2600 string: output this glyph using that string (not impl. in X windows).\n\
2601 nil: this glyph mod 256 is char code to output,\n\
2602 and this glyph / 256 is face code for X windows (see `face-id').");
2603 Vglyph_table
= Qnil
;
2605 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
2606 "Display table to use for buffers that specify none.\n\
2607 See `buffer-display-table' for more information.");
2608 Vstandard_display_table
= Qnil
;
2610 /* Initialize `window-system', unless init_display already decided it. */
2615 Vwindow_system
= Qnil
;
2616 Vwindow_system_version
= Qnil
;