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, 675 Mass Ave, Cambridge, MA 02139, USA. */
31 #include "termhooks.h"
33 #include "dispextern.h"
40 #include "intervals.h"
46 #endif /* HAVE_X_WINDOWS */
48 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
53 #define max(a, b) ((a) > (b) ? (a) : (b))
54 #define min(a, b) ((a) < (b) ? (a) : (b))
56 /* Get number of chars of output now in the buffer of a stdio stream.
57 This ought to be built in in stdio, but it isn't.
58 Some s- files override this because their stdio internals differ. */
59 #ifdef __GNU_LIBRARY__
60 /* The s- file might have overridden the definition with one that works for
61 the system's C library. But we are using the GNU C library, so this is
62 the right definition for every system. */
63 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
64 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
66 #undef PENDING_OUTPUT_COUNT
67 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
69 #else /* not __GNU_LIBRARY__ */
70 #ifndef PENDING_OUTPUT_COUNT
71 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
75 static void change_frame_size_1 ();
77 /* Nonzero upon entry to redisplay means do not assume anything about
78 current contents of actual terminal frame; clear and redraw it. */
82 /* Nonzero means last display completed. Zero means it was preempted. */
84 int display_completed
;
86 /* Lisp variable visible-bell; enables use of screen-flash
87 instead of audible bell. */
91 /* Invert the color of the whole frame, at a low level. */
95 /* Line speed of the terminal. */
99 /* nil or a symbol naming the window system under which emacs is
100 running ('x is the only current possibility). */
102 Lisp_Object Vwindow_system
;
104 /* Version number of X windows: 10, 11 or nil. */
105 Lisp_Object Vwindow_system_version
;
107 /* Vector of glyph definitions. Indexed by glyph number,
108 the contents are a string which is how to output the glyph.
110 If Vglyph_table is nil, a glyph is output by using its low 8 bits
111 as a character code. */
113 Lisp_Object Vglyph_table
;
115 /* Display table to use for vectors that don't specify their own. */
117 Lisp_Object Vstandard_display_table
;
119 /* Nonzero means reading single-character input with prompt
120 so put cursor on minibuffer after the prompt.
121 positive means at end of text in echo area;
122 negative means at beginning of line. */
123 int cursor_in_echo_area
;
125 /* The currently selected frame.
126 In a single-frame version, this variable always holds the address of
129 FRAME_PTR selected_frame
;
131 /* A frame which is not just a minibuffer, or 0 if there are no such
132 frames. This is usually the most recent such frame that was
133 selected. In a single-frame version, this variable always holds
134 the address of the_only_frame. */
135 FRAME_PTR last_nonminibuf_frame
;
137 /* In a single-frame version, the information that would otherwise
138 exist inside frame objects lives in the following structure instead.
140 NOTE: the_only_frame is not checked for garbage collection; don't
141 store collectible objects in any of its fields!
143 You're not/The only frame in town/... */
146 struct frame the_only_frame
;
149 /* This is a vector, made larger whenever it isn't large enough,
150 which is used inside `update_frame' to hold the old contents
151 of the FRAME_PHYS_LINES of the frame being updated. */
152 struct frame_glyphs
**ophys_lines
;
153 /* Length of vector currently allocated. */
154 int ophys_lines_length
;
156 FILE *termscript
; /* Stdio stream being used for copy of all output. */
158 struct cm Wcm
; /* Structure for info on cursor positioning */
160 extern short ospeed
; /* Output speed (from sg_ospeed) */
162 int delayed_size_change
; /* 1 means SIGWINCH happened when not safe. */
166 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
167 "Clear frame FRAME and output again what is supposed to appear on it.")
173 CHECK_LIVE_FRAME (frame
, 0);
176 /* set_terminal_modes (); */
178 clear_frame_records (f
);
181 windows_or_buffers_changed
++;
182 /* Mark all windows as INaccurate,
183 so that every window will have its redisplay done. */
184 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
193 XSETFRAME (frame
, f
);
194 Fredraw_frame (frame
);
199 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
200 /* Don't confuse make-docfile by having two doc strings for this function.
201 make-docfile does not pay attention to #if, for good reason! */
207 set_terminal_modes ();
211 clear_frame_records (0);
212 windows_or_buffers_changed
++;
213 /* Mark all windows as INaccurate,
214 so that every window will have its redisplay done. */
215 mark_window_display_accurate (FRAME_ROOT_WINDOW (0), 0);
221 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
222 "Clear and redisplay all visible frames.")
225 Lisp_Object tail
, frame
;
227 FOR_EACH_FRAME (tail
, frame
)
228 if (FRAME_VISIBLE_P (XFRAME (frame
)))
229 Fredraw_frame (frame
);
234 /* This is used when frame_garbaged is set.
235 Redraw the individual frames marked as garbaged. */
238 redraw_garbaged_frames ()
240 Lisp_Object tail
, frame
;
242 FOR_EACH_FRAME (tail
, frame
)
243 if (FRAME_VISIBLE_P (XFRAME (frame
))
244 && FRAME_GARBAGED_P (XFRAME (frame
)))
245 Fredraw_frame (frame
);
249 static struct frame_glyphs
*
250 make_frame_glyphs (frame
, empty
)
251 register FRAME_PTR frame
;
255 register width
= FRAME_WIDTH (frame
);
256 register height
= FRAME_HEIGHT (frame
);
257 register struct frame_glyphs
*new
258 = (struct frame_glyphs
*) xmalloc (sizeof (struct frame_glyphs
));
260 SET_GLYPHS_FRAME (new, frame
);
261 new->height
= height
;
263 new->used
= (int *) xmalloc (height
* sizeof (int));
264 new->glyphs
= (GLYPH
**) xmalloc (height
* sizeof (GLYPH
*));
265 new->charstarts
= (int **) xmalloc (height
* sizeof (int *));
266 new->highlight
= (char *) xmalloc (height
* sizeof (char));
267 new->enable
= (char *) xmalloc (height
* sizeof (char));
268 bzero (new->enable
, height
* sizeof (char));
269 new->bufp
= (int *) xmalloc (height
* sizeof (int));
271 #ifdef HAVE_X_WINDOWS
272 if (FRAME_X_P (frame
))
274 new->top_left_x
= (short *) xmalloc (height
* sizeof (short));
275 new->top_left_y
= (short *) xmalloc (height
* sizeof (short));
276 new->pix_width
= (short *) xmalloc (height
* sizeof (short));
277 new->pix_height
= (short *) xmalloc (height
* sizeof (short));
278 new->max_ascent
= (short *) xmalloc (height
* sizeof (short));
284 /* Make the buffer used by decode_mode_spec. This buffer is also
285 used as temporary storage when updating the frame. See scroll.c. */
286 unsigned int total_glyphs
= (width
+ 2) * sizeof (GLYPH
);
287 unsigned int total_charstarts
= (width
+ 2) * sizeof (int);
289 new->total_contents
= (GLYPH
*) xmalloc (total_glyphs
);
290 bzero (new->total_contents
, total_glyphs
);
292 new->total_charstarts
= (int *) xmalloc (total_charstarts
);
293 bzero (new->total_charstarts
, total_glyphs
);
297 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (GLYPH
);
299 new->total_contents
= (GLYPH
*) xmalloc (total_glyphs
);
300 bzero (new->total_contents
, total_glyphs
);
301 for (i
= 0; i
< height
; i
++)
302 new->glyphs
[i
] = new->total_contents
+ i
* (width
+ 2) + 1;
304 if (!FRAME_TERMCAP_P (frame
))
306 unsigned int total_charstarts
= height
* (width
+ 2) * sizeof (int);
308 new->total_charstarts
= (int *) xmalloc (total_charstarts
);
309 bzero (new->total_charstarts
, total_charstarts
);
310 for (i
= 0; i
< height
; i
++)
311 new->charstarts
[i
] = new->total_charstarts
+ i
* (width
+ 2) + 1;
315 /* Without a window system, we don't really need charstarts.
316 So use a small amount of space to make enough data structure
317 to prevent crashes in display_text_line. */
318 new->total_charstarts
= (int *) xmalloc ((width
+ 2) * sizeof (int));
319 for (i
= 0; i
< height
; i
++)
320 new->charstarts
[i
] = new->total_charstarts
;
328 free_frame_glyphs (frame
, glyphs
)
330 struct frame_glyphs
*glyphs
;
332 if (glyphs
->total_contents
)
333 xfree (glyphs
->total_contents
);
334 if (glyphs
->total_charstarts
)
335 xfree (glyphs
->total_charstarts
);
337 xfree (glyphs
->used
);
338 xfree (glyphs
->glyphs
);
339 xfree (glyphs
->highlight
);
340 xfree (glyphs
->enable
);
341 xfree (glyphs
->bufp
);
342 if (glyphs
->charstarts
)
343 xfree (glyphs
->charstarts
);
345 #ifdef HAVE_X_WINDOWS
346 if (FRAME_X_P (frame
))
348 xfree (glyphs
->top_left_x
);
349 xfree (glyphs
->top_left_y
);
350 xfree (glyphs
->pix_width
);
351 xfree (glyphs
->pix_height
);
352 xfree (glyphs
->max_ascent
);
360 remake_frame_glyphs (frame
)
363 if (FRAME_CURRENT_GLYPHS (frame
))
364 free_frame_glyphs (frame
, FRAME_CURRENT_GLYPHS (frame
));
365 if (FRAME_DESIRED_GLYPHS (frame
))
366 free_frame_glyphs (frame
, FRAME_DESIRED_GLYPHS (frame
));
367 if (FRAME_TEMP_GLYPHS (frame
))
368 free_frame_glyphs (frame
, FRAME_TEMP_GLYPHS (frame
));
370 if (FRAME_MESSAGE_BUF (frame
))
372 /* Reallocate the frame's message buffer; remember that
373 echo_area_glyphs may be pointing here. */
374 char *old_message_buf
= FRAME_MESSAGE_BUF (frame
);
376 FRAME_MESSAGE_BUF (frame
)
377 = (char *) xrealloc (FRAME_MESSAGE_BUF (frame
),
378 FRAME_WIDTH (frame
) + 1);
380 if (echo_area_glyphs
== old_message_buf
)
381 echo_area_glyphs
= FRAME_MESSAGE_BUF (frame
);
382 if (previous_echo_glyphs
== old_message_buf
)
383 previous_echo_glyphs
= FRAME_MESSAGE_BUF (frame
);
386 FRAME_MESSAGE_BUF (frame
)
387 = (char *) xmalloc (FRAME_WIDTH (frame
) + 1);
389 FRAME_CURRENT_GLYPHS (frame
) = make_frame_glyphs (frame
, 0);
390 FRAME_DESIRED_GLYPHS (frame
) = make_frame_glyphs (frame
, 0);
391 FRAME_TEMP_GLYPHS (frame
) = make_frame_glyphs (frame
, 1);
392 if (! FRAME_TERMCAP_P (frame
) || frame
== selected_frame
)
393 SET_FRAME_GARBAGED (frame
);
396 /* Return the hash code of contents of line VPOS in frame-matrix M. */
399 line_hash_code (m
, vpos
)
400 register struct frame_glyphs
*m
;
403 register GLYPH
*body
, *end
;
406 if (!m
->enable
[vpos
])
409 /* Give all highlighted lines the same hash code
410 so as to encourage scrolling to leave them in place. */
411 if (m
->highlight
[vpos
])
414 body
= m
->glyphs
[vpos
];
416 if (must_write_spaces
)
423 h
= (((h
<< 4) + (h
>> 24)) & 0x0fffffff) + g
- SPACEGLYPH
;
432 h
= (((h
<< 4) + (h
>> 24)) & 0x0fffffff) + g
;
440 /* Return number of characters in line in M at vpos VPOS,
441 except don't count leading and trailing spaces
442 unless the terminal requires those to be explicitly output. */
445 line_draw_cost (m
, vpos
)
446 struct frame_glyphs
*m
;
449 register GLYPH
*beg
= m
->glyphs
[vpos
];
450 register GLYPH
*end
= m
->glyphs
[vpos
] + m
->used
[vpos
];
452 register int tlen
= GLYPH_TABLE_LENGTH
;
453 register Lisp_Object
*tbase
= GLYPH_TABLE_BASE
;
455 /* Ignore trailing and leading spaces if we can. */
456 if (!must_write_spaces
)
458 while ((end
!= beg
) && (*end
== SPACEGLYPH
))
461 return (0); /* All blank line. */
463 while (*beg
== SPACEGLYPH
)
467 /* If we don't have a glyph-table, each glyph is one character,
468 so return the number of glyphs. */
472 /* Otherwise, scan the glyphs and accumulate their total size in I. */
474 while ((beg
<= end
) && *beg
)
476 register GLYPH g
= *beg
++;
478 if (GLYPH_SIMPLE_P (tbase
, tlen
, g
))
481 i
+= GLYPH_LENGTH (tbase
, g
);
486 /* The functions on this page are the interface from xdisp.c to redisplay.
488 The only other interface into redisplay is through setting
489 FRAME_CURSOR_X (frame) and FRAME_CURSOR_Y (frame)
490 and SET_FRAME_GARBAGED (frame). */
492 /* cancel_line eliminates any request to display a line at position `vpos' */
494 cancel_line (vpos
, frame
)
496 register FRAME_PTR frame
;
498 FRAME_DESIRED_GLYPHS (frame
)->enable
[vpos
] = 0;
501 clear_frame_records (frame
)
502 register FRAME_PTR frame
;
504 bzero (FRAME_CURRENT_GLYPHS (frame
)->enable
, FRAME_HEIGHT (frame
));
507 /* Clear out all display lines for a coming redisplay. */
510 init_desired_glyphs (frame
)
511 register FRAME_PTR frame
;
513 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (frame
);
515 int height
= FRAME_HEIGHT (frame
);
517 for (vpos
= 0; vpos
< height
; vpos
++)
518 desired_glyphs
->enable
[vpos
] = 0;
521 /* Prepare to display on line VPOS starting at HPOS within it. */
524 get_display_line (frame
, vpos
, hpos
)
525 register FRAME_PTR frame
;
529 register struct frame_glyphs
*glyphs
;
530 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (frame
);
536 if ((desired_glyphs
->enable
[vpos
]) && desired_glyphs
->used
[vpos
] > hpos
)
539 if (! desired_glyphs
->enable
[vpos
])
541 desired_glyphs
->used
[vpos
] = 0;
542 desired_glyphs
->highlight
[vpos
] = 0;
543 desired_glyphs
->enable
[vpos
] = 1;
546 if (hpos
> desired_glyphs
->used
[vpos
])
548 GLYPH
*g
= desired_glyphs
->glyphs
[vpos
] + desired_glyphs
->used
[vpos
];
549 GLYPH
*end
= desired_glyphs
->glyphs
[vpos
] + hpos
;
551 desired_glyphs
->used
[vpos
] = hpos
;
557 /* Like bcopy except never gets confused by overlap. */
560 safe_bcopy (from
, to
, size
)
564 if (size
<= 0 || from
== to
)
567 /* If the source and destination don't overlap, then bcopy can
568 handle it. If they do overlap, but the destination is lower in
569 memory than the source, we'll assume bcopy can handle that. */
570 if (to
< from
|| from
+ size
<= to
)
571 bcopy (from
, to
, size
);
573 /* Otherwise, we'll copy from the end. */
576 register char *endf
= from
+ size
;
577 register char *endt
= to
+ size
;
579 /* If TO - FROM is large, then we should break the copy into
580 nonoverlapping chunks of TO - FROM bytes each. However, if
581 TO - FROM is small, then the bcopy function call overhead
582 makes this not worth it. The crossover point could be about
583 anywhere. Since I don't think the obvious copy loop is too
584 bad, I'm trying to err in its favor. */
589 while (endf
!= from
);
601 bcopy (endf
, endt
, to
- from
);
604 /* If SIZE wasn't a multiple of TO - FROM, there will be a
605 little left over. The amount left over is
606 (endt + (to - from)) - to, which is endt - from. */
607 bcopy (from
, to
, endt
- from
);
612 /* Rotate a vector of SIZE bytes right, by DISTANCE bytes.
613 DISTANCE may be negative. */
616 rotate_vector (vector
, size
, distance
)
621 char *temp
= (char *) alloca (size
);
626 bcopy (vector
, temp
+ distance
, size
- distance
);
627 bcopy (vector
+ size
- distance
, temp
, distance
);
628 bcopy (temp
, vector
, size
);
631 /* Scroll lines from vpos FROM up to but not including vpos END
632 down by AMOUNT lines (AMOUNT may be negative).
633 Returns nonzero if done, zero if terminal cannot scroll them. */
636 scroll_frame_lines (frame
, from
, end
, amount
, newpos
)
637 register FRAME_PTR frame
;
638 int from
, end
, amount
, newpos
;
641 register struct frame_glyphs
*current_frame
642 = FRAME_CURRENT_GLYPHS (frame
);
644 int width
= FRAME_WIDTH (frame
);
646 if (!line_ins_del_ok
)
654 update_begin (frame
);
655 set_terminal_window (end
+ amount
);
656 if (!scroll_region_ok
)
657 ins_del_lines (end
, -amount
);
658 ins_del_lines (from
, amount
);
659 set_terminal_window (0);
661 rotate_vector (current_frame
->glyphs
+ from
,
662 sizeof (GLYPH
*) * (end
+ amount
- from
),
663 amount
* sizeof (GLYPH
*));
665 rotate_vector (current_frame
->charstarts
+ from
,
666 sizeof (int *) * (end
+ amount
- from
),
667 amount
* sizeof (int *));
669 safe_bcopy (current_frame
->used
+ from
,
670 current_frame
->used
+ from
+ amount
,
671 (end
- from
) * sizeof current_frame
->used
[0]);
673 safe_bcopy (current_frame
->highlight
+ from
,
674 current_frame
->highlight
+ from
+ amount
,
675 (end
- from
) * sizeof current_frame
->highlight
[0]);
677 safe_bcopy (current_frame
->enable
+ from
,
678 current_frame
->enable
+ from
+ amount
,
679 (end
- from
) * sizeof current_frame
->enable
[0]);
681 /* Adjust the lines by an amount
682 that puts the first of them at NEWPOS. */
683 pos_adjust
= newpos
- current_frame
->charstarts
[from
+ amount
][0];
685 /* Offset each char position in the charstarts lines we moved
687 for (i
= from
+ amount
; i
< end
+ amount
; i
++)
689 int *line
= current_frame
->charstarts
[i
];
691 for (col
= 0; col
< width
; col
++)
693 line
[col
] += pos_adjust
;
695 for (i
= from
; i
< from
+ amount
; i
++)
697 int *line
= current_frame
->charstarts
[i
];
700 for (col
= 0; col
< width
; col
++)
704 /* Mark the lines made empty by scrolling as enabled, empty and
706 bzero (current_frame
->used
+ from
,
707 amount
* sizeof current_frame
->used
[0]);
708 bzero (current_frame
->highlight
+ from
,
709 amount
* sizeof current_frame
->highlight
[0]);
710 for (i
= from
; i
< from
+ amount
; i
++)
712 current_frame
->glyphs
[i
][0] = '\0';
713 current_frame
->charstarts
[i
][0] = -1;
714 current_frame
->enable
[i
] = 1;
717 safe_bcopy (current_frame
->bufp
+ from
,
718 current_frame
->bufp
+ from
+ amount
,
719 (end
- from
) * sizeof current_frame
->bufp
[0]);
721 #ifdef HAVE_X_WINDOWS
722 if (FRAME_X_P (frame
))
724 safe_bcopy (current_frame
->top_left_x
+ from
,
725 current_frame
->top_left_x
+ from
+ amount
,
726 (end
- from
) * sizeof current_frame
->top_left_x
[0]);
728 safe_bcopy (current_frame
->top_left_y
+ from
,
729 current_frame
->top_left_y
+ from
+ amount
,
730 (end
- from
) * sizeof current_frame
->top_left_y
[0]);
732 safe_bcopy (current_frame
->pix_width
+ from
,
733 current_frame
->pix_width
+ from
+ amount
,
734 (end
- from
) * sizeof current_frame
->pix_width
[0]);
736 safe_bcopy (current_frame
->pix_height
+ from
,
737 current_frame
->pix_height
+ from
+ amount
,
738 (end
- from
) * sizeof current_frame
->pix_height
[0]);
740 safe_bcopy (current_frame
->max_ascent
+ from
,
741 current_frame
->max_ascent
+ from
+ amount
,
742 (end
- from
) * sizeof current_frame
->max_ascent
[0]);
744 #endif /* HAVE_X_WINDOWS */
750 update_begin (frame
);
751 set_terminal_window (end
);
752 ins_del_lines (from
+ amount
, amount
);
753 if (!scroll_region_ok
)
754 ins_del_lines (end
+ amount
, -amount
);
755 set_terminal_window (0);
757 rotate_vector (current_frame
->glyphs
+ from
+ amount
,
758 sizeof (GLYPH
*) * (end
- from
- amount
),
759 amount
* sizeof (GLYPH
*));
761 rotate_vector (current_frame
->charstarts
+ from
+ amount
,
762 sizeof (int *) * (end
- from
- amount
),
763 amount
* sizeof (int *));
765 safe_bcopy (current_frame
->used
+ from
,
766 current_frame
->used
+ from
+ amount
,
767 (end
- from
) * sizeof current_frame
->used
[0]);
769 safe_bcopy (current_frame
->highlight
+ from
,
770 current_frame
->highlight
+ from
+ amount
,
771 (end
- from
) * sizeof current_frame
->highlight
[0]);
773 safe_bcopy (current_frame
->enable
+ from
,
774 current_frame
->enable
+ from
+ amount
,
775 (end
- from
) * sizeof current_frame
->enable
[0]);
777 /* Adjust the lines by an amount
778 that puts the first of them at NEWPOS. */
779 pos_adjust
= newpos
- current_frame
->charstarts
[from
+ amount
][0];
781 /* Offset each char position in the charstarts lines we moved
783 for (i
= from
+ amount
; i
< end
+ amount
; i
++)
785 int *line
= current_frame
->charstarts
[i
];
787 for (col
= 0; col
< width
; col
++)
789 line
[col
] += pos_adjust
;
791 for (i
= end
+ amount
; i
< end
; i
++)
793 int *line
= current_frame
->charstarts
[i
];
796 for (col
= 0; col
< width
; col
++)
800 /* Mark the lines made empty by scrolling as enabled, empty and
802 bzero (current_frame
->used
+ end
+ amount
,
803 - amount
* sizeof current_frame
->used
[0]);
804 bzero (current_frame
->highlight
+ end
+ amount
,
805 - amount
* sizeof current_frame
->highlight
[0]);
806 for (i
= end
+ amount
; i
< end
; i
++)
808 current_frame
->glyphs
[i
][0] = '\0';
809 current_frame
->charstarts
[i
][0] = 0;
810 current_frame
->enable
[i
] = 1;
813 safe_bcopy (current_frame
->bufp
+ from
,
814 current_frame
->bufp
+ from
+ amount
,
815 (end
- from
) * sizeof current_frame
->bufp
[0]);
817 #ifdef HAVE_X_WINDOWS
818 if (FRAME_X_P (frame
))
820 safe_bcopy (current_frame
->top_left_x
+ from
,
821 current_frame
->top_left_x
+ from
+ amount
,
822 (end
- from
) * sizeof current_frame
->top_left_x
[0]);
824 safe_bcopy (current_frame
->top_left_y
+ from
,
825 current_frame
->top_left_y
+ from
+ amount
,
826 (end
- from
) * sizeof current_frame
->top_left_y
[0]);
828 safe_bcopy (current_frame
->pix_width
+ from
,
829 current_frame
->pix_width
+ from
+ amount
,
830 (end
- from
) * sizeof current_frame
->pix_width
[0]);
832 safe_bcopy (current_frame
->pix_height
+ from
,
833 current_frame
->pix_height
+ from
+ amount
,
834 (end
- from
) * sizeof current_frame
->pix_height
[0]);
836 safe_bcopy (current_frame
->max_ascent
+ from
,
837 current_frame
->max_ascent
+ from
+ amount
,
838 (end
- from
) * sizeof current_frame
->max_ascent
[0]);
840 #endif /* HAVE_X_WINDOWS */
847 /* After updating a window W that isn't the full frame wide,
848 copy all the columns that W does not occupy
849 into the FRAME_DESIRED_GLYPHS (frame) from the FRAME_PHYS_GLYPHS (frame)
850 so that update_frame will not change those columns. */
852 preserve_other_columns (w
)
856 register struct frame_glyphs
*current_frame
, *desired_frame
;
857 register FRAME_PTR frame
= XFRAME (w
->frame
);
858 int start
= XFASTINT (w
->left
);
859 int end
= XFASTINT (w
->left
) + XFASTINT (w
->width
);
860 int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
862 current_frame
= FRAME_CURRENT_GLYPHS (frame
);
863 desired_frame
= FRAME_DESIRED_GLYPHS (frame
);
865 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
867 if (current_frame
->enable
[vpos
] && desired_frame
->enable
[vpos
])
873 bcopy (current_frame
->glyphs
[vpos
],
874 desired_frame
->glyphs
[vpos
],
875 start
* sizeof (current_frame
->glyphs
[vpos
][0]));
876 bcopy (current_frame
->charstarts
[vpos
],
877 desired_frame
->charstarts
[vpos
],
878 start
* sizeof (current_frame
->charstarts
[vpos
][0]));
879 len
= min (start
, current_frame
->used
[vpos
]);
880 if (desired_frame
->used
[vpos
] < len
)
881 desired_frame
->used
[vpos
] = len
;
883 if (current_frame
->used
[vpos
] > end
884 && desired_frame
->used
[vpos
] < current_frame
->used
[vpos
])
886 while (desired_frame
->used
[vpos
] < end
)
888 int used
= desired_frame
->used
[vpos
]++;
889 desired_frame
->glyphs
[vpos
][used
] = SPACEGLYPH
;
890 desired_frame
->glyphs
[vpos
][used
] = 0;
892 bcopy (current_frame
->glyphs
[vpos
] + end
,
893 desired_frame
->glyphs
[vpos
] + end
,
894 ((current_frame
->used
[vpos
] - end
)
895 * sizeof (current_frame
->glyphs
[vpos
][0])));
896 bcopy (current_frame
->charstarts
[vpos
] + end
,
897 desired_frame
->charstarts
[vpos
] + end
,
898 ((current_frame
->used
[vpos
] - end
)
899 * sizeof (current_frame
->charstarts
[vpos
][0])));
900 desired_frame
->used
[vpos
] = current_frame
->used
[vpos
];
908 /* If window w does not need to be updated and isn't the full frame wide,
909 copy all the columns that w does occupy
910 into the FRAME_DESIRED_LINES (frame) from the FRAME_PHYS_LINES (frame)
911 so that update_frame will not change those columns.
913 Have not been able to figure out how to use this correctly. */
915 preserve_my_columns (w
)
918 register int vpos
, fin
;
919 register struct frame_glyphs
*l1
, *l2
;
920 register FRAME_PTR frame
= XFRAME (w
->frame
);
921 int start
= XFASTINT (w
->left
);
922 int end
= XFASTINT (w
->left
) + XFASTINT (w
->width
);
923 int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
925 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
927 if ((l1
= FRAME_DESIRED_GLYPHS (frame
)->glyphs
[vpos
+ 1])
928 && (l2
= FRAME_PHYS_GLYPHS (frame
)->glyphs
[vpos
+ 1]))
930 if (l2
->length
> start
&& l1
->length
< l2
->length
)
933 if (fin
> end
) fin
= end
;
934 while (l1
->length
< start
)
935 l1
->body
[l1
->length
++] = ' ';
936 bcopy (l2
->body
+ start
, l1
->body
+ start
, fin
- start
);
945 /* Adjust by ADJUST the charstart values in window W
946 after vpos VPOS, which counts relative to the frame
947 (not relative to W itself). */
950 adjust_window_charstarts (w
, vpos
, adjust
)
955 int left
= XFASTINT (w
->left
);
956 int top
= XFASTINT (w
->top
);
957 int right
= left
+ window_internal_width (w
);
958 int bottom
= top
+ window_internal_height (w
);
961 for (i
= vpos
+ 1; i
< bottom
; i
++)
964 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[i
];
966 for (j
= left
; j
< right
; j
++)
967 if (charstart
[j
] > 0)
968 charstart
[j
] += adjust
;
972 /* Check the charstarts values in the area of window W
973 for internal consistency. We cannot check that they are "right";
974 we can only look for something nonsensical. */
976 verify_charstarts (w
)
979 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
981 int top
= XFASTINT (w
->top
);
982 int bottom
= top
+ window_internal_height (w
);
983 int left
= XFASTINT (w
->left
);
984 int right
= left
+ window_internal_width (w
);
986 int truncate
= (XINT (w
->hscroll
)
987 || (truncate_partial_width_windows
988 && (XFASTINT (w
->width
) < FRAME_WIDTH (f
)))
989 || !NILP (XBUFFER (w
->buffer
)->truncate_lines
));
991 for (i
= top
; i
< bottom
; i
++)
995 int *charstart
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[i
];
1001 /* If we are truncating lines, allow a jump
1002 in charstarts from one line to the next. */
1003 if (charstart
[left
] < next_line
)
1008 if (charstart
[left
] != next_line
)
1013 for (j
= left
; j
< right
; j
++)
1014 if (charstart
[j
] > 0)
1015 last
= charstart
[j
];
1016 /* Record where the next line should start. */
1018 if (BUF_ZV (XBUFFER (w
->buffer
)) != last
)
1020 /* If there's a newline between the two lines, count that. */
1021 int endchar
= *BUF_CHAR_ADDRESS (XBUFFER (w
->buffer
), last
);
1022 if (endchar
== '\n')
1028 /* On discovering that the redisplay for a window was no good,
1029 cancel the columns of that window, so that when the window is
1030 displayed over again get_display_line will not complain. */
1032 cancel_my_columns (w
)
1036 register struct frame_glyphs
*desired_glyphs
1037 = FRAME_DESIRED_GLYPHS (XFRAME (w
->frame
));
1038 register int start
= XFASTINT (w
->left
);
1039 register int bot
= XFASTINT (w
->top
) + XFASTINT (w
->height
);
1041 for (vpos
= XFASTINT (w
->top
); vpos
< bot
; vpos
++)
1042 if (desired_glyphs
->enable
[vpos
]
1043 && desired_glyphs
->used
[vpos
] >= start
)
1044 desired_glyphs
->used
[vpos
] = start
;
1047 /* These functions try to perform directly and immediately on the frame
1048 the necessary output for one change in the buffer.
1049 They may return 0 meaning nothing was done if anything is difficult,
1050 or 1 meaning the output was performed properly.
1051 They assume that the frame was up to date before the buffer
1052 change being displayed. They make various other assumptions too;
1053 see command_loop_1 where these are called. */
1056 direct_output_for_insert (g
)
1059 register FRAME_PTR frame
= selected_frame
;
1060 register struct frame_glyphs
*current_frame
1061 = FRAME_CURRENT_GLYPHS (frame
);
1063 #ifndef COMPILER_REGISTER_BUG
1065 #endif /* COMPILER_REGISTER_BUG */
1066 struct window
*w
= XWINDOW (selected_window
);
1067 #ifndef COMPILER_REGISTER_BUG
1069 #endif /* COMPILER_REGISTER_BUG */
1070 int hpos
= FRAME_CURSOR_X (frame
);
1071 #ifndef COMPILER_REGISTER_BUG
1073 #endif /* COMPILER_REGISTER_BUG */
1074 int vpos
= FRAME_CURSOR_Y (frame
);
1076 /* Give up if about to continue line. */
1077 if (hpos
>= XFASTINT (w
->left
) + window_internal_width (w
) - 1
1079 /* Avoid losing if cursor is in invisible text off left margin */
1080 || (XINT (w
->hscroll
) && hpos
== XFASTINT (w
->left
))
1082 /* Give up if cursor outside window (in minibuf, probably) */
1083 || cursor_in_echo_area
1084 || FRAME_CURSOR_Y (frame
) < XFASTINT (w
->top
)
1085 || FRAME_CURSOR_Y (frame
) >= XFASTINT (w
->top
) + XFASTINT (w
->height
)
1087 /* Give up if cursor not really at FRAME_CURSOR_X, FRAME_CURSOR_Y */
1088 || !display_completed
1090 /* Give up if buffer appears in two places. */
1091 || buffer_shared
> 1
1093 #ifdef USE_TEXT_PROPERTIES
1094 /* Intervals have already been adjusted, point is after the
1095 character that was just inserted. */
1096 /* Give up if character is invisible. */
1097 /* Give up if character has a face property.
1098 At the moment we only lose at end of line or end of buffer
1099 and only with faces that have some background */
1100 /* Instead of wasting time, give up if character has any text properties */
1101 || ! NILP (Ftext_properties_at (make_number (point
- 1), Qnil
))
1104 /* Give up if w is minibuffer and a message is being displayed there */
1105 || (MINI_WINDOW_P (w
) && echo_area_glyphs
))
1113 if (FRAME_X_P (frame
))
1114 face
= compute_char_face (frame
, w
, point
- 1, -1, -1, &dummy
, point
, 0);
1116 current_frame
->glyphs
[vpos
][hpos
] = MAKE_GLYPH (frame
, g
, face
);
1117 current_frame
->charstarts
[vpos
][hpos
] = point
- 1;
1118 /* Record the entry for after the newly inserted character. */
1119 current_frame
->charstarts
[vpos
][hpos
+ 1] = point
;
1120 adjust_window_charstarts (w
, vpos
, 1);
1122 unchanged_modified
= MODIFF
;
1123 beg_unchanged
= GPT
- BEG
;
1124 XSETFASTINT (w
->last_point
, point
);
1125 XSETFASTINT (w
->last_point_x
, hpos
);
1126 XSETFASTINT (w
->last_modified
, MODIFF
);
1128 reassert_line_highlight (0, vpos
);
1129 write_glyphs (¤t_frame
->glyphs
[vpos
][hpos
], 1);
1131 ++FRAME_CURSOR_X (frame
);
1132 if (hpos
== current_frame
->used
[vpos
])
1134 current_frame
->used
[vpos
] = hpos
+ 1;
1135 current_frame
->glyphs
[vpos
][hpos
+ 1] = 0;
1142 direct_output_forward_char (n
)
1145 register FRAME_PTR frame
= selected_frame
;
1146 register struct window
*w
= XWINDOW (selected_window
);
1147 Lisp_Object position
;
1148 int hpos
= FRAME_CURSOR_X (frame
);
1150 /* Give up if in truncated text at end of line. */
1151 if (hpos
>= XFASTINT (w
->left
) + window_internal_width (w
) - 1)
1154 /* Avoid losing if cursor is in invisible text off left margin
1155 or about to go off either side of window. */
1156 if ((FRAME_CURSOR_X (frame
) == XFASTINT (w
->left
)
1157 && (XINT (w
->hscroll
) || n
< 0))
1159 && (FRAME_CURSOR_X (frame
) + 1 >= window_internal_width (w
) - 1))
1160 || cursor_in_echo_area
)
1163 /* Can't use direct output if highlighting a region. */
1164 if (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
1167 /* Can't use direct output at an overlay boundary; it might have
1168 before-string or after-string properties. */
1169 if (overlay_touches_p (PT
) || overlay_touches_p (PT
- n
))
1172 #ifdef USE_TEXT_PROPERTIES
1173 /* Don't use direct output next to an invisible character
1174 since we might need to do something special. */
1176 XSETFASTINT (position
, point
);
1177 if (XFASTINT (position
) < ZV
1178 && ! NILP (Fget_char_property (position
,
1183 XSETFASTINT (position
, point
- 1);
1184 if (XFASTINT (position
) >= BEGV
1185 && ! NILP (Fget_char_property (position
,
1191 FRAME_CURSOR_X (frame
) += n
;
1192 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (frame
));
1193 XSETFASTINT (w
->last_point
, point
);
1194 cursor_to (FRAME_CURSOR_Y (frame
), FRAME_CURSOR_X (frame
));
1200 static void update_line ();
1202 /* Update frame F based on the data in FRAME_DESIRED_GLYPHS.
1203 Value is nonzero if redisplay stopped due to pending input.
1204 FORCE nonzero means do not stop for pending input. */
1207 update_frame (f
, force
, inhibit_hairy_id
)
1210 int inhibit_hairy_id
;
1212 register struct frame_glyphs
*current_frame
;
1213 register struct frame_glyphs
*desired_frame
= 0;
1216 int preempt_count
= baud_rate
/ 2400 + 1;
1217 extern input_pending
;
1218 #ifdef HAVE_X_WINDOWS
1219 register int downto
, leftmost
;
1222 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
1223 calculate_costs (f
);
1225 if (preempt_count
<= 0)
1228 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1230 detect_input_pending ();
1231 if (input_pending
&& !force
)
1239 if (!line_ins_del_ok
)
1240 inhibit_hairy_id
= 1;
1242 /* These are separate to avoid a possible bug in the AIX C compiler. */
1243 current_frame
= FRAME_CURRENT_GLYPHS (f
);
1244 desired_frame
= FRAME_DESIRED_GLYPHS (f
);
1246 /* See if any of the desired lines are enabled; don't compute for
1247 i/d line if just want cursor motion. */
1248 for (i
= 0; i
< FRAME_HEIGHT (f
); i
++)
1249 if (desired_frame
->enable
[i
])
1252 /* Try doing i/d line, if not yet inhibited. */
1253 if (!inhibit_hairy_id
&& i
< FRAME_HEIGHT (f
))
1254 force
|= scrolling (f
);
1256 /* Update the individual lines as needed. Do bottom line first. */
1258 if (desired_frame
->enable
[FRAME_HEIGHT (f
) - 1])
1259 update_line (f
, FRAME_HEIGHT (f
) - 1);
1261 #ifdef HAVE_X_WINDOWS
1264 leftmost
= downto
= f
->display
.x
->internal_border_width
;
1265 if (desired_frame
->enable
[0])
1267 current_frame
->top_left_x
[FRAME_HEIGHT (f
) - 1] = leftmost
;
1268 current_frame
->top_left_y
[FRAME_HEIGHT (f
) - 1]
1269 = PIXEL_HEIGHT (f
) - f
->display
.x
->internal_border_width
1270 - current_frame
->pix_height
[FRAME_HEIGHT (f
) - 1];
1271 current_frame
->top_left_x
[0] = leftmost
;
1272 current_frame
->top_left_y
[0] = downto
;
1275 #endif /* HAVE_X_WINDOWS */
1277 /* Now update the rest of the lines. */
1278 for (i
= 0; i
< FRAME_HEIGHT (f
) - 1 && (force
|| !input_pending
); i
++)
1280 if (desired_frame
->enable
[i
])
1282 if (FRAME_TERMCAP_P (f
))
1284 /* Flush out every so many lines.
1285 Also flush out if likely to have more than 1k buffered
1286 otherwise. I'm told that some telnet connections get
1287 really screwed by more than 1k output at once. */
1288 int outq
= PENDING_OUTPUT_COUNT (stdout
);
1290 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
1293 if (preempt_count
== 1)
1295 #ifdef EMACS_OUTQSIZE
1296 if (EMACS_OUTQSIZE (0, &outq
) < 0)
1297 /* Probably not a tty. Ignore the error and reset
1298 * the outq count. */
1299 outq
= PENDING_OUTPUT_COUNT (stdout
);
1302 if (baud_rate
<= outq
&& baud_rate
> 0)
1303 sleep (outq
/ baud_rate
);
1306 if ((i
- 1) % preempt_count
== 0)
1307 detect_input_pending ();
1311 #ifdef HAVE_X_WINDOWS
1314 current_frame
->top_left_y
[i
] = downto
;
1315 current_frame
->top_left_x
[i
] = leftmost
;
1317 #endif /* HAVE_X_WINDOWS */
1320 #ifdef HAVE_X_WINDOWS
1322 downto
+= current_frame
->pix_height
[i
];
1325 pause
= (i
< FRAME_HEIGHT (f
) - 1) ? i
: 0;
1327 /* Now just clean up termcap drivers and set cursor, etc. */
1330 if (cursor_in_echo_area
1331 && FRAME_HAS_MINIBUF_P (f
)
1332 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
))
1334 int top
= XINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top
);
1337 if (cursor_in_echo_area
< 0)
1344 /* If the minibuffer is several lines high, find the last
1345 line that has any text on it. */
1346 row
= FRAME_HEIGHT (f
);
1350 if (current_frame
->enable
[row
])
1351 col
= current_frame
->used
[row
];
1355 while (row
> top
&& col
== 0);
1357 if (col
>= FRAME_WIDTH (f
))
1360 if (row
< FRAME_HEIGHT (f
) - 1)
1365 cursor_to (row
, col
);
1368 cursor_to (FRAME_CURSOR_Y (f
), max (min (FRAME_CURSOR_X (f
),
1369 FRAME_WIDTH (f
) - 1), 0));
1375 fflush (termscript
);
1378 /* Here if output is preempted because input is detected. */
1381 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1382 display_completed
= !pause
;
1384 bzero (FRAME_DESIRED_GLYPHS (f
)->enable
, FRAME_HEIGHT (f
));
1388 /* Called when about to quit, to check for doing so
1389 at an improper time. */
1394 if (FRAME_DESIRED_GLYPHS (selected_frame
) == 0)
1396 if (FRAME_DESIRED_GLYPHS (selected_frame
)->enable
[0])
1398 if (FRAME_DESIRED_GLYPHS (selected_frame
)->enable
[FRAME_HEIGHT (selected_frame
) - 1])
1402 /* Decide what insert/delete line to do, and do it */
1404 extern void scrolling_1 ();
1409 int unchanged_at_top
, unchanged_at_bottom
;
1412 int *old_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1413 int *new_hash
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1414 int *draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1415 int *old_draw_cost
= (int *) alloca (FRAME_HEIGHT (frame
) * sizeof (int));
1417 int free_at_end_vpos
= FRAME_HEIGHT (frame
);
1418 register struct frame_glyphs
*current_frame
= FRAME_CURRENT_GLYPHS (frame
);
1419 register struct frame_glyphs
*desired_frame
= FRAME_DESIRED_GLYPHS (frame
);
1421 /* Compute hash codes of all the lines.
1422 Also calculate number of changed lines,
1423 number of unchanged lines at the beginning,
1424 and number of unchanged lines at the end. */
1427 unchanged_at_top
= 0;
1428 unchanged_at_bottom
= FRAME_HEIGHT (frame
);
1429 for (i
= 0; i
< FRAME_HEIGHT (frame
); i
++)
1431 /* Give up on this scrolling if some old lines are not enabled. */
1432 if (!current_frame
->enable
[i
])
1434 old_hash
[i
] = line_hash_code (current_frame
, i
);
1435 if (! desired_frame
->enable
[i
])
1436 new_hash
[i
] = old_hash
[i
];
1438 new_hash
[i
] = line_hash_code (desired_frame
, i
);
1440 if (old_hash
[i
] != new_hash
[i
])
1443 unchanged_at_bottom
= FRAME_HEIGHT (frame
) - i
- 1;
1445 else if (i
== unchanged_at_top
)
1447 draw_cost
[i
] = line_draw_cost (desired_frame
, i
);
1448 old_draw_cost
[i
] = line_draw_cost (current_frame
, i
);
1451 /* If changed lines are few, don't allow preemption, don't scroll. */
1452 if (!scroll_region_ok
&& changed_lines
< baud_rate
/ 2400
1453 || unchanged_at_bottom
== FRAME_HEIGHT (frame
))
1456 window_size
= (FRAME_HEIGHT (frame
) - unchanged_at_top
1457 - unchanged_at_bottom
);
1459 if (scroll_region_ok
)
1460 free_at_end_vpos
-= unchanged_at_bottom
;
1461 else if (memory_below_frame
)
1462 free_at_end_vpos
= -1;
1464 /* If large window, fast terminal and few lines in common between
1465 current frame and desired frame, don't bother with i/d calc. */
1466 if (!scroll_region_ok
&& window_size
>= 18 && baud_rate
> 2400
1468 10 * scrolling_max_lines_saved (unchanged_at_top
,
1469 FRAME_HEIGHT (frame
) - unchanged_at_bottom
,
1470 old_hash
, new_hash
, draw_cost
)))
1473 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
1474 draw_cost
+ unchanged_at_top
- 1,
1475 old_draw_cost
+ unchanged_at_top
- 1,
1476 old_hash
+ unchanged_at_top
- 1,
1477 new_hash
+ unchanged_at_top
- 1,
1478 free_at_end_vpos
- unchanged_at_top
);
1483 /* Return the offset in its buffer of the character at location col, line
1484 in the given window. */
1486 buffer_posn_from_coords (window
, col
, line
)
1487 struct window
*window
;
1490 int hscroll
= XINT (window
->hscroll
);
1491 int window_left
= XFASTINT (window
->left
);
1493 /* The actual width of the window is window->width less one for the
1494 DISP_CONTINUE_GLYPH, and less one if it's not the rightmost
1496 int window_width
= window_internal_width (window
) - 1;
1498 int startp
= marker_position (window
->start
);
1500 /* Since compute_motion will only operate on the current buffer,
1501 we need to save the old one and restore it when we're done. */
1502 struct buffer
*old_current_buffer
= current_buffer
;
1503 struct position
*posn
;
1505 current_buffer
= XBUFFER (window
->buffer
);
1507 /* It would be nice if we could use FRAME_CURRENT_GLYPHS (XFRAME
1508 (window->frame))->bufp to avoid scanning from the very top of
1509 the window, but it isn't maintained correctly, and I'm not even
1510 sure I will keep it. */
1511 posn
= compute_motion (startp
, 0,
1512 (window
== XWINDOW (minibuf_window
) && startp
== 1
1513 ? minibuf_prompt_width
: 0)
1514 + (hscroll
? 1 - hscroll
: 0),
1516 window_width
, hscroll
, 0, window
);
1518 current_buffer
= old_current_buffer
;
1520 /* compute_motion considers frame points past the end of a line
1521 to be *after* the newline, i.e. at the start of the next line.
1522 This is reasonable, but not really what we want. So if the
1523 result is on a line below LINE, back it up one character. */
1524 if (posn
->vpos
> line
)
1525 return posn
->bufpos
- 1;
1527 return posn
->bufpos
;
1534 register GLYPH
*p
= r
;
1535 while (*p
++ == SPACEGLYPH
);
1540 count_match (str1
, str2
)
1543 register GLYPH
*p1
= str1
;
1544 register GLYPH
*p2
= str2
;
1545 while (*p1
++ == *p2
++);
1546 return p1
- str1
- 1;
1549 /* Char insertion/deletion cost vector, from term.c */
1550 extern int *char_ins_del_vector
;
1552 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_WIDTH((f))])
1555 update_line (frame
, vpos
)
1556 register FRAME_PTR frame
;
1559 register GLYPH
*obody
, *nbody
, *op1
, *op2
, *np1
, *temp
;
1562 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
1564 register struct frame_glyphs
*current_frame
1565 = FRAME_CURRENT_GLYPHS (frame
);
1566 register struct frame_glyphs
*desired_frame
1567 = FRAME_DESIRED_GLYPHS (frame
);
1569 if (desired_frame
->highlight
[vpos
]
1570 != (current_frame
->enable
[vpos
] && current_frame
->highlight
[vpos
]))
1572 change_line_highlight (desired_frame
->highlight
[vpos
], vpos
,
1573 (current_frame
->enable
[vpos
] ?
1574 current_frame
->used
[vpos
] : 0));
1575 current_frame
->enable
[vpos
] = 0;
1578 reassert_line_highlight (desired_frame
->highlight
[vpos
], vpos
);
1580 if (! current_frame
->enable
[vpos
])
1586 obody
= current_frame
->glyphs
[vpos
];
1587 olen
= current_frame
->used
[vpos
];
1588 if (! current_frame
->highlight
[vpos
])
1590 if (!must_write_spaces
)
1591 while (obody
[olen
- 1] == SPACEGLYPH
&& olen
> 0)
1596 /* For an inverse-video line, remember we gave it
1597 spaces all the way to the frame edge
1598 so that the reverse video extends all the way across. */
1600 while (olen
< FRAME_WIDTH (frame
) - 1)
1601 obody
[olen
++] = SPACEGLYPH
;
1605 /* One way or another, this will enable the line being updated. */
1606 current_frame
->enable
[vpos
] = 1;
1607 current_frame
->used
[vpos
] = desired_frame
->used
[vpos
];
1608 current_frame
->highlight
[vpos
] = desired_frame
->highlight
[vpos
];
1609 current_frame
->bufp
[vpos
] = desired_frame
->bufp
[vpos
];
1611 #ifdef HAVE_X_WINDOWS
1612 if (FRAME_X_P (frame
))
1614 current_frame
->pix_width
[vpos
]
1615 = current_frame
->used
[vpos
]
1616 * FONT_WIDTH (frame
->display
.x
->font
);
1617 current_frame
->pix_height
[vpos
]
1618 = frame
->display
.x
->line_height
;
1620 #endif /* HAVE_X_WINDOWS */
1622 if (!desired_frame
->enable
[vpos
])
1628 nbody
= desired_frame
->glyphs
[vpos
];
1629 nlen
= desired_frame
->used
[vpos
];
1631 /* Pretend trailing spaces are not there at all,
1632 unless for one reason or another we must write all spaces. */
1633 if (! desired_frame
->highlight
[vpos
])
1635 if (!must_write_spaces
)
1636 /* We know that the previous character byte contains 0. */
1637 while (nbody
[nlen
- 1] == SPACEGLYPH
)
1642 /* For an inverse-video line, give it extra trailing spaces
1643 all the way to the frame edge
1644 so that the reverse video extends all the way across. */
1646 while (nlen
< FRAME_WIDTH (frame
) - 1)
1647 nbody
[nlen
++] = SPACEGLYPH
;
1650 /* If there's no i/d char, quickly do the best we can without it. */
1651 if (!char_ins_del_ok
)
1656 if (FRAME_X_P (frame
))
1658 /* Under X, erase everything we are going to rewrite,
1659 and rewrite everything from the first char that's changed.
1660 This is part of supporting fonts like Courier
1661 whose chars can overlap outside the char width. */
1662 for (i
= 0; i
< nlen
; i
++)
1663 if (i
>= olen
|| nbody
[i
] != obody
[i
])
1666 cursor_to (vpos
, i
);
1668 clear_end_of_line (olen
);
1669 write_glyphs (nbody
+ i
, nlen
- i
);
1674 for (i
= 0; i
< nlen
; i
++)
1676 if (i
>= olen
|| nbody
[i
] != obody
[i
]) /* A non-matching char. */
1678 cursor_to (vpos
, i
);
1679 for (j
= 1; (i
+ j
< nlen
&&
1680 (i
+ j
>= olen
|| nbody
[i
+j
] != obody
[i
+j
]));
1683 /* Output this run of non-matching chars. */
1684 write_glyphs (nbody
+ i
, j
);
1687 /* Now find the next non-match. */
1691 /* Clear the rest of the line, or the non-clear part of it. */
1694 cursor_to (vpos
, nlen
);
1695 clear_end_of_line (olen
);
1698 /* Exchange contents between current_frame and new_frame. */
1699 temp
= desired_frame
->glyphs
[vpos
];
1700 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1701 current_frame
->glyphs
[vpos
] = temp
;
1703 /* Exchange charstarts between current_frame and new_frame. */
1704 temp1
= desired_frame
->charstarts
[vpos
];
1705 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1706 current_frame
->charstarts
[vpos
] = temp1
;
1713 nsp
= (must_write_spaces
|| desired_frame
->highlight
[vpos
])
1714 ? 0 : count_blanks (nbody
);
1717 cursor_to (vpos
, nsp
);
1718 write_glyphs (nbody
+ nsp
, nlen
- nsp
);
1721 /* Exchange contents between current_frame and new_frame. */
1722 temp
= desired_frame
->glyphs
[vpos
];
1723 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1724 current_frame
->glyphs
[vpos
] = temp
;
1726 /* Exchange charstarts between current_frame and new_frame. */
1727 temp1
= desired_frame
->charstarts
[vpos
];
1728 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1729 current_frame
->charstarts
[vpos
] = temp1
;
1738 /* Compute number of leading blanks in old and new contents. */
1739 osp
= count_blanks (obody
);
1740 if (!desired_frame
->highlight
[vpos
])
1741 nsp
= count_blanks (nbody
);
1745 /* Compute number of matching chars starting with first nonblank. */
1746 begmatch
= count_match (obody
+ osp
, nbody
+ nsp
);
1748 /* Spaces in new match implicit space past the end of old. */
1749 /* A bug causing this to be a no-op was fixed in 18.29. */
1750 if (!must_write_spaces
&& osp
+ begmatch
== olen
)
1753 while (np1
[begmatch
] == SPACEGLYPH
)
1757 /* Avoid doing insert/delete char
1758 just cause number of leading spaces differs
1759 when the following text does not match. */
1760 if (begmatch
== 0 && osp
!= nsp
)
1761 osp
= nsp
= min (osp
, nsp
);
1763 /* Find matching characters at end of line */
1766 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
1767 while (op1
> op2
&& op1
[-1] == np1
[-1])
1772 endmatch
= obody
+ olen
- op1
;
1774 /* Put correct value back in nbody[nlen].
1775 This is important because direct_output_for_insert
1776 can write into the line at a later point.
1777 If this screws up the zero at the end of the line, re-establish it. */
1781 /* tem gets the distance to insert or delete.
1782 endmatch is how many characters we save by doing so.
1785 tem
= (nlen
- nsp
) - (olen
- osp
);
1787 && (!char_ins_del_ok
|| endmatch
<= char_ins_del_cost (frame
)[tem
]))
1790 /* nsp - osp is the distance to insert or delete.
1791 If that is nonzero, begmatch is known to be nonzero also.
1792 begmatch + endmatch is how much we save by doing the ins/del.
1796 && (!char_ins_del_ok
1797 || begmatch
+ endmatch
<= char_ins_del_cost (frame
)[nsp
- osp
]))
1801 osp
= nsp
= min (osp
, nsp
);
1804 /* Now go through the line, inserting, writing and
1805 deleting as appropriate. */
1809 cursor_to (vpos
, nsp
);
1810 delete_glyphs (osp
- nsp
);
1814 /* If going to delete chars later in line
1815 and insert earlier in the line,
1816 must delete first to avoid losing data in the insert */
1817 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
1819 cursor_to (vpos
, nlen
- endmatch
+ osp
- nsp
);
1820 delete_glyphs (olen
+ nsp
- osp
- nlen
);
1821 olen
= nlen
- (nsp
- osp
);
1823 cursor_to (vpos
, osp
);
1824 insert_glyphs ((char *)0, nsp
- osp
);
1828 tem
= nsp
+ begmatch
+ endmatch
;
1829 if (nlen
!= tem
|| olen
!= tem
)
1831 cursor_to (vpos
, nsp
+ begmatch
);
1832 if (!endmatch
|| nlen
== olen
)
1834 /* If new text being written reaches right margin,
1835 there is no need to do clear-to-eol at the end.
1836 (and it would not be safe, since cursor is not
1837 going to be "at the margin" after the text is done) */
1838 if (nlen
== FRAME_WIDTH (frame
))
1840 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1844 /* the following code loses disastrously if tem == nlen.
1845 Rather than trying to fix that case, I am trying the simpler
1846 solution found above. */
1848 /* If the text reaches to the right margin,
1849 it will lose one way or another (depending on AutoWrap)
1850 to clear to end of line after outputting all the text.
1851 So pause with one character to go and clear the line then. */
1852 if (nlen
== FRAME_WIDTH (frame
) && fast_clear_end_of_line
&& olen
> nlen
)
1854 /* endmatch must be zero, and tem must equal nsp + begmatch */
1855 write_glyphs (nbody
+ tem
, nlen
- tem
- 1);
1856 clear_end_of_line (olen
);
1857 olen
= 0; /* Don't let it be cleared again later */
1858 write_glyphs (nbody
+ nlen
- 1, 1);
1861 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1862 #endif /* OBSOLETE */
1865 else if (nlen
> olen
)
1867 write_glyphs (nbody
+ nsp
+ begmatch
, olen
- tem
);
1868 insert_glyphs (nbody
+ nsp
+ begmatch
+ olen
- tem
, nlen
- olen
);
1871 else if (olen
> nlen
)
1873 write_glyphs (nbody
+ nsp
+ begmatch
, nlen
- tem
);
1874 delete_glyphs (olen
- nlen
);
1880 /* If any unerased characters remain after the new line, erase them. */
1883 cursor_to (vpos
, nlen
);
1884 clear_end_of_line (olen
);
1887 /* Exchange contents between current_frame and new_frame. */
1888 temp
= desired_frame
->glyphs
[vpos
];
1889 desired_frame
->glyphs
[vpos
] = current_frame
->glyphs
[vpos
];
1890 current_frame
->glyphs
[vpos
] = temp
;
1892 /* Exchange charstarts between current_frame and new_frame. */
1893 temp1
= desired_frame
->charstarts
[vpos
];
1894 desired_frame
->charstarts
[vpos
] = current_frame
->charstarts
[vpos
];
1895 current_frame
->charstarts
[vpos
] = temp1
;
1898 /* A vector of size >= NFRAMES + 3 * NBUFFERS + 1, containing the session's
1899 frames, buffers, buffer-read-only flags, and buffer-modified-flags,
1900 and a trailing sentinel (so we don't need to add length checks). */
1901 static Lisp_Object frame_and_buffer_state
;
1903 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
1904 Sframe_or_buffer_changed_p
, 0, 0, 0,
1905 "Return non-nil if the frame and buffer state appears to have changed.\n\
1906 The state variable is an internal vector containing all frames and buffers,\n\
1907 aside from buffers whose names start with space,\n\
1908 along with the buffers' read-only and modified flags, which allows a fast\n\
1909 check to see whether the menu bars might need to be recomputed.\n\
1910 If this function returns non-nil, it updates the internal vector to reflect\n\
1911 the current state.\n")
1914 Lisp_Object tail
, frame
, buf
;
1917 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
1918 FOR_EACH_FRAME (tail
, frame
)
1919 if (!EQ (*vecp
++, frame
))
1921 /* Check that the buffer info matches.
1922 No need to test for the end of the vector
1923 because the last element of the vector is lambda
1924 and that will always cause a mismatch. */
1925 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1927 buf
= XCONS (XCONS (tail
)->car
)->cdr
;
1928 /* Ignore buffers that aren't included in buffer lists. */
1929 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1931 if (!EQ (*vecp
++, buf
))
1933 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
1935 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
1938 /* Detect deletion of a buffer at the end of the list. */
1939 if (*vecp
== Qlambda
)
1942 /* Start with 1 so there is room for at least one lambda at the end. */
1944 FOR_EACH_FRAME (tail
, frame
)
1946 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1948 /* Reallocate the vector if it's grown, or if it's shrunk a lot. */
1949 if (n
> XVECTOR (frame_and_buffer_state
)->size
1950 || n
< XVECTOR (frame_and_buffer_state
)->size
/ 2)
1951 frame_and_buffer_state
= Fmake_vector (make_number (n
), Qlambda
);
1952 vecp
= XVECTOR (frame_and_buffer_state
)->contents
;
1953 FOR_EACH_FRAME (tail
, frame
)
1955 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1957 buf
= XCONS (XCONS (tail
)->car
)->cdr
;
1958 /* Ignore buffers that aren't included in buffer lists. */
1959 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1962 *vecp
++ = XBUFFER (buf
)->read_only
;
1963 *vecp
++ = Fbuffer_modified_p (buf
);
1965 /* If we left any slack in the vector, fill it up now. */
1966 for (; n
< XVECTOR (frame_and_buffer_state
)->size
; ++n
)
1971 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
1972 1, 1, "FOpen termscript file: ",
1973 "Start writing all terminal output to FILE as well as the terminal.\n\
1974 FILE = nil means just close any termscript file currently open.")
1978 if (termscript
!= 0) fclose (termscript
);
1983 file
= Fexpand_file_name (file
, Qnil
);
1984 termscript
= fopen (XSTRING (file
)->data
, "w");
1985 if (termscript
== 0)
1986 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
1994 window_change_signal (signalnum
) /* If we don't have an argument, */
1995 int signalnum
; /* some compilers complain in signal calls. */
1999 int old_errno
= errno
;
2001 get_frame_size (&width
, &height
);
2003 /* The frame size change obviously applies to a termcap-controlled
2004 frame. Find such a frame in the list, and assume it's the only
2005 one (since the redisplay code always writes to stdout, not a
2006 FILE * specified in the frame structure). Record the new size,
2007 but don't reallocate the data structures now. Let that be done
2008 later outside of the signal handler. */
2011 Lisp_Object tail
, frame
;
2013 FOR_EACH_FRAME (tail
, frame
)
2015 if (FRAME_TERMCAP_P (XFRAME (frame
)))
2017 change_frame_size (XFRAME (frame
), height
, width
, 0, 1);
2023 signal (SIGWINCH
, window_change_signal
);
2026 #endif /* SIGWINCH */
2029 /* Do any change in frame size that was requested by a signal. */
2031 do_pending_window_change ()
2033 /* If window_change_signal should have run before, run it now. */
2034 while (delayed_size_change
)
2036 Lisp_Object tail
, frame
;
2038 delayed_size_change
= 0;
2040 FOR_EACH_FRAME (tail
, frame
)
2042 FRAME_PTR f
= XFRAME (frame
);
2044 int height
= FRAME_NEW_HEIGHT (f
);
2045 int width
= FRAME_NEW_WIDTH (f
);
2047 if (height
!= 0 || width
!= 0)
2048 change_frame_size (f
, height
, width
, 0, 0);
2054 /* Change the frame height and/or width. Values may be given as zero to
2055 indicate no change is to take place.
2057 If DELAY is non-zero, then assume we're being called from a signal
2058 handler, and queue the change for later - perhaps the next
2059 redisplay. Since this tries to resize windows, we can't call it
2060 from a signal handler. */
2062 change_frame_size (f
, newheight
, newwidth
, pretend
, delay
)
2063 register FRAME_PTR f
;
2064 int newheight
, newwidth
, pretend
;
2066 Lisp_Object tail
, frame
;
2067 if (FRAME_TERMCAP_P (f
))
2069 /* When using termcap, all frames use the same screen,
2070 so a change in size affects all termcap frames. */
2071 FOR_EACH_FRAME (tail
, frame
)
2072 if (FRAME_TERMCAP_P (XFRAME (frame
)))
2073 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
2077 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
);
2081 change_frame_size_1 (frame
, newheight
, newwidth
, pretend
, delay
)
2082 register FRAME_PTR frame
;
2083 int newheight
, newwidth
, pretend
;
2085 /* If we can't deal with the change now, queue it for later. */
2088 FRAME_NEW_HEIGHT (frame
) = newheight
;
2089 FRAME_NEW_WIDTH (frame
) = newwidth
;
2090 delayed_size_change
= 1;
2094 /* This size-change overrides any pending one for this frame. */
2095 FRAME_NEW_HEIGHT (frame
) = 0;
2096 FRAME_NEW_WIDTH (frame
) = 0;
2098 /* If an argument is zero, set it to the current value. */
2099 newheight
|| (newheight
= FRAME_HEIGHT (frame
));
2100 newwidth
|| (newwidth
= FRAME_WIDTH (frame
));
2102 /* Round up to the smallest acceptable size. */
2103 check_frame_size (frame
, &newheight
, &newwidth
);
2105 /* If we're not changing the frame size, quit now. */
2106 if (newheight
== FRAME_HEIGHT (frame
)
2107 && newwidth
== FRAME_WIDTH (frame
))
2110 if (newheight
!= FRAME_HEIGHT (frame
))
2112 if (FRAME_HAS_MINIBUF_P (frame
)
2113 && ! FRAME_MINIBUF_ONLY_P (frame
))
2115 /* Frame has both root and minibuffer. */
2116 set_window_height (FRAME_ROOT_WINDOW (frame
),
2117 newheight
- 1 - FRAME_MENU_BAR_LINES (frame
), 0);
2118 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (frame
))->top
,
2120 set_window_height (FRAME_MINIBUF_WINDOW (frame
), 1, 0);
2123 /* Frame has just one top-level window. */
2124 set_window_height (FRAME_ROOT_WINDOW (frame
),
2125 newheight
- FRAME_MENU_BAR_LINES (frame
), 0);
2127 if (FRAME_TERMCAP_P (frame
) && !pretend
)
2128 FrameRows
= newheight
;
2131 if (frame
->output_method
== output_termcap
)
2133 frame_height
= newheight
;
2135 FrameRows
= newheight
;
2140 if (newwidth
!= FRAME_WIDTH (frame
))
2142 set_window_width (FRAME_ROOT_WINDOW (frame
), newwidth
, 0);
2143 if (FRAME_HAS_MINIBUF_P (frame
))
2144 set_window_width (FRAME_MINIBUF_WINDOW (frame
), newwidth
, 0);
2146 if (FRAME_TERMCAP_P (frame
) && !pretend
)
2147 FrameCols
= newwidth
;
2149 if (frame
->output_method
== output_termcap
)
2151 frame_width
= newwidth
;
2153 FrameCols
= newwidth
;
2158 FRAME_HEIGHT (frame
) = newheight
;
2159 FRAME_WIDTH (frame
) = newwidth
;
2161 if (FRAME_CURSOR_X (frame
) >= FRAME_WIDTH (frame
))
2162 FRAME_CURSOR_X (frame
) = FRAME_WIDTH (frame
) - 1;
2163 if (FRAME_CURSOR_Y (frame
) >= FRAME_HEIGHT (frame
))
2164 FRAME_CURSOR_Y (frame
) = FRAME_HEIGHT (frame
) - 1;
2166 remake_frame_glyphs (frame
);
2167 calculate_costs (frame
);
2170 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
2171 Ssend_string_to_terminal
, 1, 1, 0,
2172 "Send STRING to the terminal without alteration.\n\
2173 Control characters in STRING will have terminal-dependent effects.")
2177 CHECK_STRING (str
, 0);
2178 fwrite (XSTRING (str
)->data
, 1, XSTRING (str
)->size
, stdout
);
2182 fwrite (XSTRING (str
)->data
, 1, XSTRING (str
)->size
, termscript
);
2183 fflush (termscript
);
2188 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
2189 "Beep, or flash the screen.\n\
2190 Also, unless an argument is given,\n\
2191 terminate any keyboard macro currently executing.")
2213 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
2214 error ("Keyboard macro terminated by a command ringing the bell");
2220 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
2221 "Pause, without updating display, for SECONDS seconds.\n\
2222 SECONDS may be a floating-point value, meaning that you can wait for a\n\
2223 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
2224 additional wait period, in milliseconds; this may be useful if your\n\
2225 Emacs was built without floating point support.\n\
2226 \(Not all operating systems support waiting for a fraction of a second.)")
2227 (seconds
, milliseconds
)
2228 Lisp_Object seconds
, milliseconds
;
2232 if (NILP (milliseconds
))
2233 XSETINT (milliseconds
, 0);
2235 CHECK_NUMBER (milliseconds
, 1);
2236 usec
= XINT (milliseconds
) * 1000;
2238 #ifdef LISP_FLOAT_TYPE
2240 double duration
= extract_float (seconds
);
2241 sec
= (int) duration
;
2242 usec
+= (duration
- sec
) * 1000000;
2245 CHECK_NUMBER (seconds
, 0);
2246 sec
= XINT (seconds
);
2249 #ifndef EMACS_HAS_USECS
2250 if (sec
== 0 && usec
!= 0)
2251 error ("millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
2254 /* Assure that 0 <= usec < 1000000. */
2257 /* We can't rely on the rounding being correct if user is negative. */
2258 if (-1000000 < usec
)
2259 sec
--, usec
+= 1000000;
2261 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
2264 sec
+= usec
/ 1000000, usec
%= 1000000;
2272 XSETFASTINT (zero
, 0);
2273 wait_reading_process_input (sec
, usec
, zero
, 0);
2276 /* We should always have wait_reading_process_input; we have a dummy
2277 implementation for systems which don't support subprocesses. */
2279 /* No wait_reading_process_input */
2286 /* The reason this is done this way
2287 (rather than defined (H_S) && defined (H_T))
2288 is because the VMS preprocessor doesn't grok `defined' */
2290 EMACS_GET_TIME (end_time
);
2291 EMACS_SET_SECS_USECS (timeout
, sec
, usec
);
2292 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2296 EMACS_GET_TIME (timeout
);
2297 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2298 if (EMACS_TIME_NEG_P (timeout
)
2299 || !select (1, 0, 0, 0, &timeout
))
2302 #else /* not HAVE_SELECT */
2304 #endif /* HAVE_SELECT */
2305 #endif /* not VMS */
2308 #endif /* no subprocesses */
2313 /* This is just like wait_reading_process_input, except that
2314 it does the redisplay.
2316 It's also much like Fsit_for, except that it can be used for
2317 waiting for input as well. */
2320 sit_for (sec
, usec
, reading
, display
)
2321 int sec
, usec
, reading
, display
;
2323 Lisp_Object read_kbd
;
2325 if (detect_input_pending ())
2329 redisplay_preserve_echo_area ();
2331 if (sec
== 0 && usec
== 0)
2338 XSETINT (read_kbd
, reading
? -1 : 1);
2339 wait_reading_process_input (sec
, usec
, read_kbd
, display
);
2342 /* wait_reading_process_input should always be available now; it is
2343 simulated in a simple way on systems that don't support
2346 /* No wait_reading_process_input available. */
2352 input_wait_timeout (XINT (arg
));
2354 #ifndef HAVE_TIMEVAL
2356 select (1, &waitchannels
, 0, 0, &timeout_sec
);
2357 #else /* HAVE_TIMEVAL */
2358 timeout
.tv_sec
= sec
;
2359 timeout
.tv_usec
= usec
;
2360 select (1, &waitchannels
, 0, 0, &timeout
);
2361 #endif /* HAVE_TIMEVAL */
2362 #endif /* not VMS */
2367 return detect_input_pending () ? Qnil
: Qt
;
2370 DEFUN ("sit-for", Fsit_for
, Ssit_for
, 1, 3, 0,
2371 "Perform redisplay, then wait for SECONDS seconds or until input is available.\n\
2372 SECONDS may be a floating-point value, meaning that you can wait for a\n\
2373 fraction of a second. Optional second arg MILLISECONDS specifies an\n\
2374 additional wait period, in milliseconds; this may be useful if your\n\
2375 Emacs was built without floating point support.\n\
2376 \(Not all operating systems support waiting for a fraction of a second.)\n\
2377 Optional third arg non-nil means don't redisplay, just wait for input.\n\
2378 Redisplay is preempted as always if input arrives, and does not happen\n\
2379 if input is available before it starts.\n\
2380 Value is t if waited the full time with no input arriving.")
2381 (seconds
, milliseconds
, nodisp
)
2382 Lisp_Object seconds
, milliseconds
, nodisp
;
2386 if (NILP (milliseconds
))
2387 XSETINT (milliseconds
, 0);
2389 CHECK_NUMBER (milliseconds
, 1);
2390 usec
= XINT (milliseconds
) * 1000;
2392 #ifdef LISP_FLOAT_TYPE
2394 double duration
= extract_float (seconds
);
2395 sec
= (int) duration
;
2396 usec
+= (duration
- sec
) * 1000000;
2399 CHECK_NUMBER (seconds
, 0);
2400 sec
= XINT (seconds
);
2403 #ifndef EMACS_HAS_USECS
2404 if (usec
!= 0 && sec
== 0)
2405 error ("millisecond `sit-for' not supported on %s", SYSTEM_TYPE
);
2409 prepare_menu_bars ();
2410 return sit_for (sec
, usec
, 0, NILP (nodisp
));
2413 char *terminal_type
;
2415 /* Initialization done when Emacs fork is started, before doing stty. */
2416 /* Determine terminal type and set terminal_driver */
2417 /* Then invoke its decoding routine to set up variables
2418 in the terminal package */
2422 #ifdef HAVE_X_WINDOWS
2423 extern int display_arg
;
2428 cursor_in_echo_area
= 0;
2429 terminal_type
= (char *) 0;
2431 /* Now is the time to initialize this; it's used by init_sys_modes
2433 Vwindow_system
= Qnil
;
2435 /* If the user wants to use a window system, we shouldn't bother
2436 initializing the terminal. This is especially important when the
2437 terminal is so dumb that emacs gives up before and doesn't bother
2438 using the window system.
2440 If the DISPLAY environment variable is set, try to use X, and die
2441 with an error message if that doesn't work. */
2443 #ifdef HAVE_X_WINDOWS
2447 display_arg
= (getenv ("DECW$DISPLAY") != 0);
2449 display_arg
= (getenv ("DISPLAY") != 0);
2453 if (!inhibit_window_system
&& display_arg
)
2455 Vwindow_system
= intern ("x");
2457 Vwindow_system_version
= make_number (11);
2459 Vwindow_system_version
= make_number (10);
2463 #endif /* HAVE_X_WINDOWS */
2465 /* If no window system has been specified, try to use the terminal. */
2468 fprintf (stderr
, "emacs: standard input is not a tty\n");
2472 /* Look at the TERM variable */
2473 terminal_type
= (char *) getenv ("TERM");
2477 fprintf (stderr
, "Please specify your terminal type.\n\
2478 For types defined in VMS, use set term /device=TYPE.\n\
2479 For types not defined in VMS, use define emacs_term \"TYPE\".\n\
2480 \(The quotation marks are necessary since terminal types are lower case.)\n");
2482 fprintf (stderr
, "Please set the environment variable TERM; see tset(1).\n");
2488 /* VMS DCL tends to upcase things, so downcase term type.
2489 Hardly any uppercase letters in terminal types; should be none. */
2491 char *new = (char *) xmalloc (strlen (terminal_type
) + 1);
2494 strcpy (new, terminal_type
);
2496 for (p
= new; *p
; p
++)
2500 terminal_type
= new;
2504 term_init (terminal_type
);
2506 remake_frame_glyphs (selected_frame
);
2507 calculate_costs (selected_frame
);
2509 /* X and Y coordinates of the cursor between updates. */
2510 FRAME_CURSOR_X (selected_frame
) = 0;
2511 FRAME_CURSOR_Y (selected_frame
) = 0;
2516 #endif /* CANNOT_DUMP */
2517 signal (SIGWINCH
, window_change_signal
);
2518 #endif /* SIGWINCH */
2524 defsubr (&Sredraw_frame
);
2526 defsubr (&Sredraw_display
);
2527 defsubr (&Sframe_or_buffer_changed_p
);
2528 defsubr (&Sopen_termscript
);
2530 defsubr (&Ssit_for
);
2531 defsubr (&Ssleep_for
);
2532 defsubr (&Ssend_string_to_terminal
);
2534 frame_and_buffer_state
= Fmake_vector (make_number (1), Qlambda
);
2535 staticpro (&frame_and_buffer_state
);
2537 DEFVAR_INT ("baud-rate", &baud_rate
,
2538 "*The output baud rate of the terminal.\n\
2539 On most systems, changing this value will affect the amount of padding\n\
2540 and the other strategic decisions made during redisplay.");
2541 DEFVAR_BOOL ("inverse-video", &inverse_video
,
2542 "*Non-nil means invert the entire frame display.\n\
2543 This means everything is in inverse video which otherwise would not be.");
2544 DEFVAR_BOOL ("visible-bell", &visible_bell
,
2545 "*Non-nil means try to flash the frame to represent a bell.");
2546 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
2547 "*Non-nil means no need to redraw entire frame after suspending.\n\
2548 A non-nil value is useful if the terminal can automatically preserve\n\
2549 Emacs's frame display when you reenter Emacs.\n\
2550 It is up to you to set this variable if your terminal can do that.");
2551 DEFVAR_LISP ("window-system", &Vwindow_system
,
2552 "A symbol naming the window-system under which Emacs is running\n\
2553 \(such as `x'), or nil if emacs is running on an ordinary terminal.");
2554 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
2555 "The version number of the window system in use.\n\
2556 For X windows, this is 10 or 11.");
2557 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
2558 "Non-nil means put cursor in minibuffer, at end of any message there.");
2559 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
2560 "Table defining how to output a glyph code to the frame.\n\
2561 If not nil, this is a vector indexed by glyph code to define the glyph.\n\
2562 Each element can be:\n\
2563 integer: a glyph code which this glyph is an alias for.\n\
2564 string: output this glyph using that string (not impl. in X windows).\n\
2565 nil: this glyph mod 256 is char code to output,\n\
2566 and this glyph / 256 is face code for X windows (see `face-id').");
2567 Vglyph_table
= Qnil
;
2569 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
2570 "Display table to use for buffers that specify none.\n\
2571 See `buffer-display-table' for more information.");
2572 Vstandard_display_table
= Qnil
;
2574 /* Initialize `window-system', unless init_display already decided it. */
2579 Vwindow_system
= Qnil
;
2580 Vwindow_system_version
= Qnil
;