1 /* Display generation from window structure and buffer text.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1997
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 /*#include <ctype.h>*/
31 #include "dispextern.h"
38 #include "termhooks.h"
39 #include "intervals.h"
44 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
45 extern void set_frame_menubar ();
46 extern int pending_menu_activation
;
49 extern int interrupt_input
;
50 extern int command_loop_level
;
52 extern int minibuffer_auto_raise
;
54 extern Lisp_Object Qface
;
56 extern Lisp_Object Voverriding_local_map
;
57 extern Lisp_Object Voverriding_local_map_menu_flag
;
59 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
60 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
61 Lisp_Object Qredisplay_end_trigger_functions
;
63 /* Nonzero means print newline to stdout before next minibuffer message. */
65 int noninteractive_need_newline
;
67 /* Nonzero means print newline to message log before next message. */
69 static int message_log_need_newline
;
71 #define min(a, b) ((a) < (b) ? (a) : (b))
72 #define max(a, b) ((a) > (b) ? (a) : (b))
73 #define minmax(floor, val, ceil) \
74 ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val))
76 /* The buffer position of the first character appearing
77 entirely or partially on the current frame line.
78 Or zero, which disables the optimization for the current frame line. */
79 static int this_line_bufpos
;
81 /* Number of characters past the end of this line,
82 including the terminating newline */
83 static int this_line_endpos
;
85 /* The vertical position of this frame line. */
86 static int this_line_vpos
;
88 /* Hpos value for start of display on this frame line.
89 Usually zero, but negative if first character really began
91 static int this_line_start_hpos
;
93 /* Buffer that this_line variables are describing. */
94 static struct buffer
*this_line_buffer
;
96 /* Value of echo_area_glyphs when it was last acted on.
97 If this is nonzero, there is a message on the frame
98 in the minibuffer and it should be erased as soon
99 as it is no longer requested to appear. */
100 char *previous_echo_glyphs
;
102 /* Nonzero means truncate lines in all windows less wide than the frame */
103 int truncate_partial_width_windows
;
105 /* Nonzero means we have more than one non-minibuffer-only frame.
106 Not guaranteed to be accurate except while parsing frame-title-format. */
109 Lisp_Object Vglobal_mode_string
;
111 /* Marker for where to display an arrow on top of the buffer text. */
112 Lisp_Object Voverlay_arrow_position
;
114 /* String to display for the arrow. */
115 Lisp_Object Voverlay_arrow_string
;
117 /* Values of those variables at last redisplay.
118 However, if Voverlay_arrow_position is a marker,
119 last_arrow_position is its numerical position. */
120 static Lisp_Object last_arrow_position
, last_arrow_string
;
122 /* Like mode-line-format, but for the titlebar on a visible frame. */
123 Lisp_Object Vframe_title_format
;
125 /* Like mode-line-format, but for the titlebar on an iconified frame. */
126 Lisp_Object Vicon_title_format
;
128 /* List of functions to call when a window's size changes. These
129 functions get one arg, a frame on which one or more windows' sizes
131 static Lisp_Object Vwindow_size_change_functions
;
133 Lisp_Object Qmenu_bar_update_hook
;
135 /* Nonzero if overlay arrow has been displayed once in this window. */
136 static int overlay_arrow_seen
;
138 /* Nonzero if visible end of buffer has already been displayed once
139 in this window. (We need this variable in case there are overlay
140 strings that get displayed there.) */
141 static int zv_strings_seen
;
143 /* Nonzero means highlight the region even in nonselected windows. */
144 static int highlight_nonselected_windows
;
146 /* If cursor motion alone moves point off frame,
147 Try scrolling this many lines up or down if that will bring it back. */
148 static int scroll_step
;
150 /* Non-0 means scroll just far enough to bring point back on the screen,
152 static int scroll_conservatively
;
154 /* Recenter the window whenever point gets within this many lines
155 of the top or bottom of the window. */
158 /* Nonzero if try_window_id has made blank lines at window bottom
159 since the last redisplay that paused */
160 static int blank_end_of_window
;
162 /* Number of windows showing the buffer of the selected window
163 (or another buffer with the same base buffer).
164 keyboard.c refers to this. */
167 /* display_text_line sets these to the frame position (origin 0) of point,
168 whether the window is selected or not.
169 Set one to -1 first to determine whether point was found afterwards. */
171 static int cursor_vpos
;
172 static int cursor_hpos
;
174 static int debug_end_pos
;
176 /* Nonzero means display mode line highlighted */
177 int mode_line_inverse_video
;
179 static void redisplay_internal ();
180 static int message_log_check_duplicate ();
181 static void echo_area_display ();
182 void mark_window_display_accurate ();
183 static void redisplay_windows ();
184 static void redisplay_window ();
185 static void update_menu_bar ();
186 static void try_window ();
187 static int try_window_id ();
188 static struct position
*display_text_line ();
189 static void display_mode_line ();
190 static int display_mode_element ();
191 static char *decode_mode_spec ();
192 static int display_string ();
193 static void display_menu_bar ();
194 static int display_count_lines ();
196 /* Prompt to display in front of the minibuffer contents */
197 Lisp_Object minibuf_prompt
;
199 /* Width in columns of current minibuffer prompt. */
200 int minibuf_prompt_width
;
202 /* Message to display instead of minibuffer contents
203 This is what the functions error and message make,
204 and command echoing uses it as well.
205 It overrides the minibuf_prompt as well as the buffer. */
206 char *echo_area_glyphs
;
208 /* This is the length of the message in echo_area_glyphs. */
209 int echo_area_glyphs_length
;
211 /* This is the window where the echo area message was displayed.
212 It is always a minibuffer window, but it may not be the
213 same window currently active as a minibuffer. */
214 Lisp_Object echo_area_window
;
216 /* true iff we should redraw the mode lines on the next redisplay */
217 int update_mode_lines
;
219 /* Smallest number of characters before the gap
220 at any time since last redisplay that finished.
221 Valid for current buffer when try_window_id can be called. */
224 /* Smallest number of characters after the gap
225 at any time since last redisplay that finished.
226 Valid for current buffer when try_window_id can be called. */
229 /* MODIFF as of last redisplay that finished;
230 if it matches MODIFF, and overlay_unchanged_modified
231 matches OVERLAY_MODIFF, that means beg_unchanged and end_unchanged
232 contain no useful information */
233 int unchanged_modified
;
235 /* OVERLAY_MODIFF as of last redisplay that finished. */
236 int overlay_unchanged_modified
;
238 /* Nonzero if window sizes or contents have changed
239 since last redisplay that finished */
240 int windows_or_buffers_changed
;
242 /* Nonzero after display_mode_line if %l was used
243 and it displayed a line number. */
244 int line_number_displayed
;
246 /* Maximum buffer size for which to display line numbers. */
247 static int line_number_display_limit
;
249 /* Number of lines to keep in the message log buffer.
250 t means infinite. nil means don't log at all. */
251 Lisp_Object Vmessage_log_max
;
253 #define COERCE_MARKER(X) \
254 (MARKERP ((X)) ? make_number (marker_position (X)) : (X))
256 /* Output a newline in the *Messages* buffer if "needs" one. */
259 message_log_maybe_newline ()
261 if (message_log_need_newline
)
262 message_dolog ("", 0, 1);
266 /* Add a string to the message log, optionally terminated with a newline.
267 This function calls low-level routines in order to bypass text property
268 hooks, etc. which might not be safe to run. */
271 message_dolog (m
, len
, nlflag
)
275 if (!NILP (Vmessage_log_max
))
277 struct buffer
*oldbuf
;
278 int oldpoint
, oldbegv
, oldzv
;
279 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
281 oldbuf
= current_buffer
;
282 Fset_buffer (Fget_buffer_create (build_string ("*Messages*")));
283 current_buffer
->undo_list
= Qt
;
290 oldpoint
+= len
+ nlflag
;
292 oldzv
+= len
+ nlflag
;
295 insert_1 (m
, len
, 1, 0);
298 int this_bol
, prev_bol
, dup
;
299 insert_1 ("\n", 1, 1, 0);
301 this_bol
= scan_buffer ('\n', Z
, 0, -2, 0, 0);
304 prev_bol
= scan_buffer ('\n', this_bol
, 0, -2, 0, 0);
305 dup
= message_log_check_duplicate (prev_bol
, this_bol
);
308 if (oldpoint
> prev_bol
)
309 oldpoint
-= min (this_bol
, oldpoint
) - prev_bol
;
310 if (oldbegv
> prev_bol
)
311 oldbegv
-= min (this_bol
, oldbegv
) - prev_bol
;
312 if (oldzv
> prev_bol
)
313 oldzv
-= min (this_bol
, oldzv
) - prev_bol
;
314 del_range_1 (prev_bol
, this_bol
, 0);
320 /* If you change this format, don't forget to also
321 change message_log_check_duplicate. */
322 sprintf (dupstr
, " [%d times]", dup
);
323 duplen
= strlen (dupstr
);
329 insert_1 (dupstr
, duplen
, 1, 0);
334 if (NATNUMP (Vmessage_log_max
))
336 int pos
= scan_buffer ('\n', Z
, 0,
337 -XFASTINT (Vmessage_log_max
) - 1, 0, 0);
338 oldpoint
-= min (pos
, oldpoint
) - BEG
;
339 oldbegv
-= min (pos
, oldbegv
) - BEG
;
340 oldzv
-= min (pos
, oldzv
) - BEG
;
341 del_range_1 (BEG
, pos
, 0);
346 TEMP_SET_PT (oldpoint
);
347 set_buffer_internal (oldbuf
);
348 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
349 message_log_need_newline
= !nlflag
;
353 /* We are at the end of the buffer after just having inserted a newline.
354 (Note: We depend on the fact we won't be crossing the gap.)
355 Check to see if the most recent message looks a lot like the previous one.
356 Return 0 if different, 1 if the new one should just replace it, or a
357 value N > 1 if we should also append " [N times]". */
360 message_log_check_duplicate (prev_bol
, this_bol
)
361 int prev_bol
, this_bol
;
364 int len
= Z
- 1 - this_bol
;
366 unsigned char *p1
= BUF_CHAR_ADDRESS (current_buffer
, prev_bol
);
367 unsigned char *p2
= BUF_CHAR_ADDRESS (current_buffer
, this_bol
);
369 for (i
= 0; i
< len
; i
++)
371 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.'
380 if (*p1
++ == ' ' && *p1
++ == '[')
383 while (*p1
>= '0' && *p1
<= '9')
384 n
= n
* 10 + *p1
++ - '0';
385 if (strncmp (p1
, " times]\n", 8) == 0)
391 /* Display an echo area message M with a specified length of LEN chars.
392 The string may include null characters. If M is 0, clear out any
393 existing message, and let the minibuffer text show through.
395 The buffer M must continue to exist until after the echo area
396 gets cleared or some other message gets displayed there.
398 Do not pass text that is stored in a Lisp string.
399 Do not pass text in a buffer that was alloca'd. */
406 /* First flush out any partial line written with print. */
407 message_log_maybe_newline ();
409 message_dolog (m
, len
, 1);
410 message2_nolog (m
, len
);
414 /* The non-logging counterpart of message2. */
417 message2_nolog (m
, len
)
423 if (noninteractive_need_newline
)
425 noninteractive_need_newline
= 0;
427 fwrite (m
, len
, 1, stderr
);
428 if (cursor_in_echo_area
== 0)
429 fprintf (stderr
, "\n");
432 /* A null message buffer means that the frame hasn't really been
433 initialized yet. Error messages get reported properly by
434 cmd_error, so this must be just an informative message; toss it. */
435 else if (INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
437 Lisp_Object mini_window
;
440 /* Get the frame containing the minibuffer
441 that the selected frame is using. */
442 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
443 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
445 FRAME_SAMPLE_VISIBILITY (f
);
446 if (FRAME_VISIBLE_P (selected_frame
)
447 && ! FRAME_VISIBLE_P (f
))
448 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
452 echo_area_glyphs
= m
;
453 echo_area_glyphs_length
= len
;
455 if (minibuffer_auto_raise
)
456 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
459 echo_area_glyphs
= previous_echo_glyphs
= 0;
461 do_pending_window_change ();
462 echo_area_display ();
463 update_frame (f
, 1, 1);
464 do_pending_window_change ();
465 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
466 (*frame_up_to_date_hook
) (f
);
470 /* Display a null-terminated echo area message M. If M is 0, clear out any
471 existing message, and let the minibuffer text show through.
473 The buffer M must continue to exist until after the echo area
474 gets cleared or some other message gets displayed there.
476 Do not pass text that is stored in a Lisp string.
477 Do not pass text in a buffer that was alloca'd. */
483 message2 (m
, (m
? strlen (m
) : 0));
490 message2_nolog (m
, (m
? strlen (m
) : 0));
493 /* Truncate what will be displayed in the echo area
494 the next time we display it--but don't redisplay it now. */
497 truncate_echo_area (len
)
500 /* A null message buffer means that the frame hasn't really been
501 initialized yet. Error messages get reported properly by
502 cmd_error, so this must be just an informative message; toss it. */
503 if (!noninteractive
&& INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
504 echo_area_glyphs_length
= len
;
507 /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print;
508 zero if being used by message. */
509 int message_buf_print
;
511 /* Dump an informative message to the minibuf. If M is 0, clear out
512 any existing message, and let the minibuffer text show through. */
516 message (m
, a1
, a2
, a3
)
518 EMACS_INT a1
, a2
, a3
;
524 if (noninteractive_need_newline
)
526 noninteractive_need_newline
= 0;
527 fprintf (stderr
, m
, a1
, a2
, a3
);
528 if (cursor_in_echo_area
== 0)
529 fprintf (stderr
, "\n");
533 else if (INTERACTIVE
)
535 /* The frame whose minibuffer we're going to display the message on.
536 It may be larger than the selected frame, so we need
537 to use its buffer, not the selected frame's buffer. */
538 Lisp_Object mini_window
;
541 /* Get the frame containing the minibuffer
542 that the selected frame is using. */
543 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
544 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
546 /* A null message buffer means that the frame hasn't really been
547 initialized yet. Error messages get reported properly by
548 cmd_error, so this must be just an informative message; toss it. */
549 if (FRAME_MESSAGE_BUF (f
))
560 len
= doprnt (FRAME_MESSAGE_BUF (f
),
561 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
563 len
= doprnt (FRAME_MESSAGE_BUF (f
),
564 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, &a1
);
565 #endif /* NO_ARG_ARRAY */
567 message2 (FRAME_MESSAGE_BUF (f
), len
);
572 /* Print should start at the beginning of the message
574 message_buf_print
= 0;
579 /* The non-logging version of message. */
581 message_nolog (m
, a1
, a2
, a3
)
583 EMACS_INT a1
, a2
, a3
;
585 Lisp_Object old_log_max
;
586 old_log_max
= Vmessage_log_max
;
587 Vmessage_log_max
= Qnil
;
588 message (m
, a1
, a2
, a3
);
589 Vmessage_log_max
= old_log_max
;
595 message2 (echo_area_glyphs
, echo_area_glyphs_length
);
603 Lisp_Object mini_window
;
605 /* Choose the minibuffer window for this display.
606 It is the minibuffer window used by the selected frame. */
607 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
608 /* This is the frame that window is in. */
609 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
611 if (! FRAME_VISIBLE_P (f
))
616 redraw_garbaged_frames ();
620 if (echo_area_glyphs
|| minibuf_level
== 0)
624 echo_area_window
= mini_window
;
626 vpos
= XFASTINT (XWINDOW (mini_window
)->top
);
627 get_display_line (f
, vpos
, 0);
629 /* Make sure the columns that overlap a left-hand scroll bar
631 for (i
= 0; i
< FRAME_LEFT_SCROLL_BAR_WIDTH (f
); i
++)
632 f
->desired_glyphs
->glyphs
[vpos
][i
] = SPACEGLYPH
;
634 display_string (XWINDOW (mini_window
), vpos
,
635 echo_area_glyphs
? echo_area_glyphs
: "",
636 echo_area_glyphs
? echo_area_glyphs_length
: -1,
637 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
639 FRAME_WIDTH (f
) + FRAME_LEFT_SCROLL_BAR_WIDTH (f
));
641 #if 0 /* This just gets in the way. update_frame does the job. */
642 /* If desired cursor location is on this line, put it at end of text */
643 if (cursor_in_echo_area
)
644 FRAME_CURSOR_Y (f
) = vpos
;
645 if (FRAME_CURSOR_Y (f
) == vpos
)
646 FRAME_CURSOR_X (f
) = FRAME_DESIRED_GLYPHS (f
)->used
[vpos
];
649 /* Fill the rest of the minibuffer window with blank lines. */
654 i
< vpos
+ XFASTINT (XWINDOW (mini_window
)->height
); i
++)
656 get_display_line (f
, i
, 0);
657 /* We don't use FRAME_SCROLL_BAR_WIDTH (f) as the starting
658 hpos, because it is good to clear whatever is behind the
659 scroll bar. This does not affect the scroll bar itself. */
660 display_string (XWINDOW (mini_window
), i
,
663 0, FRAME_WIDTH (f
) + FRAME_SCROLL_BAR_WIDTH (f
));
667 else if (!EQ (mini_window
, selected_window
))
668 windows_or_buffers_changed
++;
670 if (EQ (mini_window
, selected_window
))
671 this_line_bufpos
= 0;
673 previous_echo_glyphs
= echo_area_glyphs
;
676 /* Update frame titles. */
678 #ifdef HAVE_WINDOW_SYSTEM
679 static char frame_title_buf
[512];
680 static char *frame_title_ptr
;
683 store_frame_title (str
, mincol
, maxcol
)
688 if (maxcol
< 0 || maxcol
>= sizeof(frame_title_buf
))
689 maxcol
= sizeof (frame_title_buf
);
690 limit
= &frame_title_buf
[maxcol
];
691 while (*str
!= '\0' && frame_title_ptr
< limit
)
692 *frame_title_ptr
++ = *str
++;
693 while (frame_title_ptr
< &frame_title_buf
[mincol
])
694 *frame_title_ptr
++ = ' ';
695 return frame_title_ptr
- frame_title_buf
;
699 x_consider_frame_title (frame
)
705 FRAME_PTR f
= XFRAME (frame
);
707 if (!(FRAME_WINDOW_P (f
) || FRAME_MINIBUF_ONLY_P (f
) || f
->explicit_name
))
710 /* Do we have more than one visible frame on this X display? */
714 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
716 FRAME_PTR tf
= XFRAME (XCONS (tail
)->car
);
718 if (tf
!= f
&& FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
719 && !FRAME_MINIBUF_ONLY_P (tf
)
720 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
724 multiple_frames
= CONSP (tail
);
727 obuf
= current_buffer
;
728 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
729 fmt
= (FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
);
730 frame_title_ptr
= frame_title_buf
;
731 len
= display_mode_element (XWINDOW (f
->selected_window
), 0, 0, 0,
732 0, sizeof (frame_title_buf
), fmt
);
734 set_buffer_internal (obuf
);
735 /* Set the name only if it's changed. This avoids consing
736 in the common case where it hasn't. (If it turns out that we've
737 already wasted too much time by walking through the list with
738 display_mode_element, then we might need to optimize at a higher
740 if (! STRINGP (f
->name
) || XSTRING (f
->name
)->size
!= len
741 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
742 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
745 #define frame_title_ptr ((char *)0)
746 #define store_frame_title(str, mincol, maxcol) 0
749 /* Prepare for redisplay by updating menu-bar item lists when appropriate.
750 This can call eval. */
755 register struct window
*w
= XWINDOW (selected_window
);
757 struct gcpro gcpro1
, gcpro2
;
759 all_windows
= (update_mode_lines
|| buffer_shared
> 1
760 || windows_or_buffers_changed
);
762 /* Update all frame titles based on their buffer names, etc.
763 We do this before the menu bars so that the buffer-menu
764 will show the up-to-date frame titles.
766 This used to be done after the menu bars, for a reason that
767 was stated as follows but which I do not understand:
768 "We do this after the menu bars so that the frame will first
769 create its menu bar using the name `emacs' if no other name
770 has yet been specified."
771 I think that is no longer a concern. */
772 #ifdef HAVE_WINDOW_SYSTEM
773 if (windows_or_buffers_changed
|| update_mode_lines
)
775 Lisp_Object tail
, frame
;
777 FOR_EACH_FRAME (tail
, frame
)
778 if (FRAME_VISIBLE_P (XFRAME (frame
))
779 || FRAME_ICONIFIED_P (XFRAME (frame
)))
780 x_consider_frame_title (frame
);
784 /* Update the menu bar item lists, if appropriate.
785 This has to be done before any actual redisplay
786 or generation of display lines. */
789 Lisp_Object tail
, frame
;
790 int count
= specpdl_ptr
- specpdl
;
792 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
794 FOR_EACH_FRAME (tail
, frame
)
796 /* If a window on this frame changed size,
797 report that to the user and clear the size-change flag. */
798 if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)))
800 Lisp_Object functions
;
801 /* Clear flag first in case we get error below. */
802 FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)) = 0;
803 functions
= Vwindow_size_change_functions
;
804 GCPRO2 (tail
, functions
);
805 while (CONSP (functions
))
807 call1 (XCONS (functions
)->car
, frame
);
808 functions
= XCONS (functions
)->cdr
;
813 update_menu_bar (XFRAME (frame
), 0);
817 unbind_to (count
, Qnil
);
820 update_menu_bar (selected_frame
, 1);
822 /* Motif needs this. See comment in xmenu.c.
823 Turn it off when pending_menu_activation is not defined. */
825 pending_menu_activation
= 0;
829 /* Do a frame update, taking possible shortcuts into account.
830 This is the main external entry point for redisplay.
832 If the last redisplay displayed an echo area message and that
833 message is no longer requested, we clear the echo area
834 or bring back the minibuffer if that is in use.
836 Do not call eval from within this function.
837 Calls to eval after the call to echo_area_display would confuse
838 the display_line mechanism and would cause a crash.
839 Calls to eval before that point will work most of the time,
840 but can still lose, because this function
841 can be called from signal handlers; with alarms set up;
842 or with synchronous processes running.
844 See Fcall_process; if you called it from here, it could be
845 entered recursively. */
847 static int do_verify_charstarts
;
849 /* Counter is used to clear the face cache
850 no more than once ever 1000 redisplays. */
851 static int clear_face_cache_count
;
853 /* Record the previous terminal frame we displayed. */
854 static FRAME_PTR previous_terminal_frame
;
859 redisplay_internal (0);
862 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay
863 is not in response to any user action; therefore, we should
864 preserve the echo area. (Actually, our caller does that job.)
865 Perhaps in the future avoid recentering windows
866 if it is not necessary; currently that causes some problems. */
869 redisplay_internal (preserve_echo_area
)
870 int preserve_echo_area
;
872 register struct window
*w
= XWINDOW (selected_window
);
876 register int tlbufpos
, tlendpos
;
878 int number_of_visible_frames
;
884 if (popup_activated ())
890 if (! FRAME_WINDOW_P (selected_frame
)
891 && previous_terminal_frame
!= selected_frame
)
893 /* Since frames on an ASCII terminal share the same display area,
894 displaying a different frame means redisplay the whole thing. */
895 windows_or_buffers_changed
++;
896 SET_FRAME_GARBAGED (selected_frame
);
897 XSETFRAME (Vterminal_frame
, selected_frame
);
899 previous_terminal_frame
= selected_frame
;
901 /* Set the visible flags for all frames.
902 Do this before checking for resized or garbaged frames; they want
903 to know if their frames are visible.
904 See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */
906 Lisp_Object tail
, frame
;
908 number_of_visible_frames
= 0;
910 FOR_EACH_FRAME (tail
, frame
)
912 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
914 if (FRAME_VISIBLE_P (XFRAME (frame
)))
915 number_of_visible_frames
++;
917 /* Clear out all the display lines in which we will generate the
918 glyphs to display. */
919 init_desired_glyphs (XFRAME (frame
));
923 /* Notice any pending interrupt request to change frame size. */
924 do_pending_window_change ();
928 redraw_garbaged_frames ();
932 prepare_menu_bars ();
934 if (windows_or_buffers_changed
)
937 /* Detect case that we need to write or remove a star in the mode line. */
938 if ((SAVE_MODIFF
< MODIFF
) != !NILP (w
->last_had_star
))
940 w
->update_mode_line
= Qt
;
941 if (buffer_shared
> 1)
945 /* If %c is in use, update it if needed. */
946 if (!NILP (w
->column_number_displayed
)
947 /* This alternative quickly identifies a common case
948 where no change is needed. */
949 && !(PT
== XFASTINT (w
->last_point
)
950 && XFASTINT (w
->last_modified
) >= MODIFF
951 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
952 && XFASTINT (w
->column_number_displayed
) != current_column ())
953 w
->update_mode_line
= Qt
;
955 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
957 all_windows
= update_mode_lines
|| buffer_shared
> 1;
959 /* If specs for an arrow have changed, do thorough redisplay
960 to ensure we remove any arrow that should no longer exist. */
961 if (! EQ (COERCE_MARKER (Voverlay_arrow_position
), last_arrow_position
)
962 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
965 /* Normally the message* functions will have already displayed and
966 updated the echo area, but the frame may have been trashed, or
967 the update may have been preempted, so display the echo area
969 if (echo_area_glyphs
|| previous_echo_glyphs
)
971 echo_area_display ();
975 /* If showing region, and mark has changed, must redisplay whole window. */
976 if (((!NILP (Vtransient_mark_mode
)
977 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
978 != !NILP (w
->region_showing
))
979 || (!NILP (w
->region_showing
)
980 && !EQ (w
->region_showing
,
981 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
982 this_line_bufpos
= -1;
984 tlbufpos
= this_line_bufpos
;
985 tlendpos
= this_line_endpos
;
986 if (!all_windows
&& tlbufpos
> 0 && NILP (w
->update_mode_line
)
987 && !current_buffer
->clip_changed
988 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
989 /* Make sure recorded data applies to current buffer, etc */
990 && this_line_buffer
== current_buffer
991 && current_buffer
== XBUFFER (w
->buffer
)
992 && NILP (w
->force_start
)
993 /* Point must be on the line that we have info recorded about */
995 && PT
<= Z
- tlendpos
996 /* All text outside that line, including its final newline,
998 && ((XFASTINT (w
->last_modified
) >= MODIFF
999 && (XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
))
1000 || (beg_unchanged
>= tlbufpos
- 1
1002 /* If selective display, can't optimize
1003 if the changes start at the beginning of the line. */
1004 && ((INTEGERP (current_buffer
->selective_display
)
1005 && XINT (current_buffer
->selective_display
) > 0
1006 ? (beg_unchanged
>= tlbufpos
1009 && end_unchanged
>= tlendpos
1010 && Z
- GPT
>= tlendpos
)))
1012 if (tlbufpos
> BEGV
&& FETCH_BYTE (tlbufpos
- 1) != '\n'
1014 || FETCH_BYTE (tlbufpos
) == '\n'))
1015 /* Former continuation line has disappeared by becoming empty */
1017 else if (XFASTINT (w
->last_modified
) < MODIFF
1018 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
1019 || MINI_WINDOW_P (w
))
1021 /* We have to handle the case of continuation around a
1022 wide-column character (See the comment in indent.c around
1025 For instance, in the following case:
1027 -------- Insert --------
1028 K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars.
1029 J_I_ ==> J_I_ `^^' are cursors.
1033 As we have to redraw the line above, we should goto cancel. */
1035 struct position val
;
1038 prevline
= find_next_newline (tlbufpos
, -1);
1039 val
= *compute_motion (prevline
, 0,
1040 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1043 1 << (BITS_PER_SHORT
- 1),
1044 1 << (BITS_PER_SHORT
- 1),
1045 window_internal_width (w
) - 1,
1046 XINT (w
->hscroll
), 0, w
);
1047 if (val
.hpos
!= this_line_start_hpos
)
1051 overlay_arrow_seen
= 0;
1052 zv_strings_seen
= 0;
1053 display_text_line (w
, tlbufpos
, this_line_vpos
, this_line_start_hpos
,
1054 pos_tab_offset (w
, tlbufpos
), 0);
1055 /* If line contains point, is not continued,
1056 and ends at same distance from eob as before, we win */
1057 if (cursor_vpos
>= 0 && this_line_bufpos
1058 && this_line_endpos
== tlendpos
)
1060 /* If this is not the window's last line,
1061 we must adjust the charstarts of the lines below. */
1062 if (this_line_vpos
+ 1
1063 < XFASTINT (w
->top
) + window_internal_height (w
))
1065 int left
= WINDOW_LEFT_MARGIN (w
);
1066 int *charstart_next_line
1067 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[this_line_vpos
+ 1];
1070 if (Z
- tlendpos
== ZV
)
1071 /* This line ends at end of (accessible part of) buffer.
1072 There is no newline to count. */
1073 adjust
= Z
- tlendpos
- charstart_next_line
[left
];
1075 /* This line ends in a newline.
1076 Must take account of the newline and the rest of the
1077 text that follows. */
1078 adjust
= Z
- tlendpos
+ 1 - charstart_next_line
[left
];
1080 adjust_window_charstarts (w
, this_line_vpos
, adjust
);
1083 if (!WINDOW_FULL_WIDTH_P (w
))
1084 preserve_other_columns (w
);
1090 else if (PT
== XFASTINT (w
->last_point
)
1091 /* Make sure the cursor was last displayed
1092 in this window. Otherwise we have to reposition it. */
1093 && XINT (w
->top
) <= FRAME_CURSOR_Y (selected_frame
)
1094 && (XINT (w
->top
) + XINT (w
->height
)
1095 > FRAME_CURSOR_Y (selected_frame
)))
1099 do_pending_window_change ();
1104 /* If highlighting the region, or if the cursor is in the echo area,
1105 then we can't just move the cursor. */
1106 else if (! (!NILP (Vtransient_mark_mode
)
1107 && !NILP (current_buffer
->mark_active
))
1108 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1109 || highlight_nonselected_windows
)
1110 && NILP (w
->region_showing
)
1111 && !cursor_in_echo_area
)
1113 pos
= *compute_motion (tlbufpos
, 0,
1114 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1116 PT
, 2, - (1 << (BITS_PER_SHORT
- 1)),
1117 window_internal_width (w
) - 1,
1119 pos_tab_offset (w
, tlbufpos
), w
);
1122 int width
= window_internal_width (w
) - 1;
1123 FRAME_CURSOR_X (selected_frame
)
1124 = WINDOW_LEFT_MARGIN (w
) + minmax (0, pos
.hpos
, width
);
1125 FRAME_CURSOR_Y (selected_frame
) = this_line_vpos
;
1132 /* Text changed drastically or point moved off of line */
1133 cancel_line (this_line_vpos
, selected_frame
);
1136 this_line_bufpos
= 0;
1137 all_windows
|= buffer_shared
> 1;
1139 clear_face_cache_count
++;
1143 Lisp_Object tail
, frame
;
1146 /* Clear the face cache, only when we do a full redisplay
1147 and not too often either. */
1148 if (clear_face_cache_count
> 1000)
1150 clear_face_cache ();
1151 clear_face_cache_count
= 0;
1155 /* Recompute # windows showing selected buffer.
1156 This will be incremented each time such a window is displayed. */
1159 FOR_EACH_FRAME (tail
, frame
)
1161 FRAME_PTR f
= XFRAME (frame
);
1162 if (FRAME_WINDOW_P (f
) || f
== selected_frame
)
1165 /* Mark all the scroll bars to be removed; we'll redeem the ones
1166 we want when we redisplay their windows. */
1167 if (condemn_scroll_bars_hook
)
1168 (*condemn_scroll_bars_hook
) (f
);
1170 if (FRAME_VISIBLE_P (f
))
1171 redisplay_windows (FRAME_ROOT_WINDOW (f
), preserve_echo_area
);
1173 /* Any scroll bars which redisplay_windows should have nuked
1174 should now go away. */
1175 if (judge_scroll_bars_hook
)
1176 (*judge_scroll_bars_hook
) (f
);
1180 else if (FRAME_VISIBLE_P (selected_frame
))
1182 redisplay_window (selected_window
, 1, preserve_echo_area
);
1183 if (!WINDOW_FULL_WIDTH_P (w
))
1184 preserve_other_columns (w
);
1188 /* Prevent various kinds of signals during display update.
1189 stdio is not robust about handling signals,
1190 which can cause an apparent I/O error. */
1191 if (interrupt_input
)
1201 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1205 if (!FRAMEP (XCONS (tail
)->car
))
1208 f
= XFRAME (XCONS (tail
)->car
);
1210 if ((FRAME_WINDOW_P (f
) || f
== selected_frame
)
1211 && FRAME_VISIBLE_P (f
))
1213 pause
|= update_frame (f
, 0, 0);
1216 mark_window_display_accurate (f
->root_window
, 1);
1217 if (frame_up_to_date_hook
!= 0)
1218 (*frame_up_to_date_hook
) (f
);
1225 if (FRAME_VISIBLE_P (selected_frame
))
1226 pause
= update_frame (selected_frame
, 0, 0);
1230 /* We may have called echo_area_display at the top of this
1231 function. If the echo area is on another frame, that may
1232 have put text on a frame other than the selected one, so the
1233 above call to update_frame would not have caught it. Catch
1236 Lisp_Object mini_window
;
1237 FRAME_PTR mini_frame
;
1239 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
1240 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
1242 if (mini_frame
!= selected_frame
&& FRAME_WINDOW_P (mini_frame
))
1243 pause
|= update_frame (mini_frame
, 0, 0);
1247 /* If frame does not match, prevent doing single-line-update next time.
1248 Also, don't forget to check every line to update the arrow. */
1251 this_line_bufpos
= 0;
1252 if (!NILP (last_arrow_position
))
1254 last_arrow_position
= Qt
;
1255 last_arrow_string
= Qt
;
1257 /* If we pause after scrolling, some lines in current_frame
1258 may be null, so preserve_other_columns won't be able to
1259 preserve all the vertical-bar separators. So, avoid using it
1261 if (!WINDOW_FULL_WIDTH_P (w
))
1262 update_mode_lines
= 1;
1265 /* Now text on frame agrees with windows, so
1266 put info into the windows for partial redisplay to follow */
1270 register struct buffer
*b
= XBUFFER (w
->buffer
);
1272 blank_end_of_window
= 0;
1273 unchanged_modified
= BUF_MODIFF (b
);
1274 overlay_unchanged_modified
= BUF_OVERLAY_MODIFF (b
);
1275 beg_unchanged
= BUF_GPT (b
) - BUF_BEG (b
);
1276 end_unchanged
= BUF_Z (b
) - BUF_GPT (b
);
1278 XSETFASTINT (w
->last_point
, BUF_PT (b
));
1279 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (selected_frame
));
1280 XSETFASTINT (w
->last_point_y
, FRAME_CURSOR_Y (selected_frame
));
1283 mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame
), 1);
1286 b
->clip_changed
= 0;
1287 w
->update_mode_line
= Qnil
;
1288 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
1289 XSETFASTINT (w
->last_overlay_modified
, BUF_OVERLAY_MODIFF (b
));
1291 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1294 /* Record if we are showing a region, so can make sure to
1295 update it fully at next redisplay. */
1296 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1297 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1298 || highlight_nonselected_windows
)
1299 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1300 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1303 w
->window_end_valid
= w
->buffer
;
1304 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1305 last_arrow_string
= Voverlay_arrow_string
;
1306 if (do_verify_charstarts
)
1307 verify_charstarts (w
);
1308 if (frame_up_to_date_hook
!= 0)
1309 (*frame_up_to_date_hook
) (selected_frame
);
1311 update_mode_lines
= 0;
1312 windows_or_buffers_changed
= 0;
1315 /* Start SIGIO interrupts coming again.
1316 Having them off during the code above
1317 makes it less likely one will discard output,
1318 but not impossible, since there might be stuff
1319 in the system buffer here.
1320 But it is much hairier to try to do anything about that. */
1322 if (interrupt_input
)
1326 /* If something has become visible now which was not before,
1327 redisplay again, so that we get them. */
1330 Lisp_Object tail
, frame
;
1333 FOR_EACH_FRAME (tail
, frame
)
1335 int this_is_visible
= 0;
1337 if (XFRAME (frame
)->visible
)
1338 this_is_visible
= 1;
1339 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1340 if (XFRAME (frame
)->visible
)
1341 this_is_visible
= 1;
1343 if (this_is_visible
)
1347 if (new_count
!= number_of_visible_frames
)
1348 windows_or_buffers_changed
++;
1351 /* Change frame size now if a change is pending. */
1352 do_pending_window_change ();
1354 /* If we just did a pending size change, or have additional
1355 visible frames, redisplay again. */
1356 if (windows_or_buffers_changed
&& !pause
)
1360 /* Redisplay, but leave alone any recent echo area message
1361 unless another message has been requested in its place.
1363 This is useful in situations where you need to redisplay but no
1364 user action has occurred, making it inappropriate for the message
1365 area to be cleared. See tracking_off and
1366 wait_reading_process_input for examples of these situations. */
1368 redisplay_preserve_echo_area ()
1370 if (echo_area_glyphs
== 0 && previous_echo_glyphs
!= 0)
1372 echo_area_glyphs
= previous_echo_glyphs
;
1373 redisplay_internal (1);
1374 echo_area_glyphs
= 0;
1377 redisplay_internal (1);
1381 mark_window_display_accurate (window
, flag
)
1385 register struct window
*w
;
1387 for (;!NILP (window
); window
= w
->next
)
1389 if (!WINDOWP (window
)) abort ();
1390 w
= XWINDOW (window
);
1392 if (!NILP (w
->buffer
))
1394 XSETFASTINT (w
->last_modified
,
1395 !flag
? 0 : BUF_MODIFF (XBUFFER (w
->buffer
)));
1396 XSETFASTINT (w
->last_overlay_modified
,
1397 !flag
? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w
->buffer
)));
1399 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1402 /* Record if we are showing a region, so can make sure to
1403 update it fully at next redisplay. */
1404 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1405 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1406 || highlight_nonselected_windows
)
1407 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1408 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1412 w
->window_end_valid
= w
->buffer
;
1413 w
->update_mode_line
= Qnil
;
1414 if (!NILP (w
->buffer
) && flag
)
1415 XBUFFER (w
->buffer
)->clip_changed
= 0;
1417 if (!NILP (w
->vchild
))
1418 mark_window_display_accurate (w
->vchild
, flag
);
1419 if (!NILP (w
->hchild
))
1420 mark_window_display_accurate (w
->hchild
, flag
);
1425 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1426 last_arrow_string
= Voverlay_arrow_string
;
1430 /* t is unequal to any useful value of Voverlay_arrow_... */
1431 last_arrow_position
= Qt
;
1432 last_arrow_string
= Qt
;
1436 /* Update the menu bar item list for frame F.
1437 This has to be done before we start to fill in any display lines,
1438 because it can call eval.
1440 If SAVE_MATCH_DATA is 1, we must save and restore it here. */
1443 update_menu_bar (f
, save_match_data
)
1445 int save_match_data
;
1447 struct buffer
*old
= current_buffer
;
1449 register struct window
*w
;
1451 window
= FRAME_SELECTED_WINDOW (f
);
1452 w
= XWINDOW (window
);
1454 if (update_mode_lines
)
1455 w
->update_mode_line
= Qt
;
1457 if (FRAME_WINDOW_P (f
)
1459 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1460 FRAME_EXTERNAL_MENU_BAR (f
)
1462 FRAME_MENU_BAR_LINES (f
) > 0
1464 : FRAME_MENU_BAR_LINES (f
) > 0)
1466 /* If the user has switched buffers or windows, we need to
1467 recompute to reflect the new bindings. But we'll
1468 recompute when update_mode_lines is set too; that means
1469 that people can use force-mode-line-update to request
1470 that the menu bar be recomputed. The adverse effect on
1471 the rest of the redisplay algorithm is about the same as
1472 windows_or_buffers_changed anyway. */
1473 if (windows_or_buffers_changed
1474 || !NILP (w
->update_mode_line
)
1475 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1476 < BUF_MODIFF (XBUFFER (w
->buffer
)))
1477 != !NILP (w
->last_had_star
))
1478 || ((!NILP (Vtransient_mark_mode
)
1479 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1480 != !NILP (w
->region_showing
)))
1482 struct buffer
*prev
= current_buffer
;
1483 int count
= specpdl_ptr
- specpdl
;
1485 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1486 if (save_match_data
)
1487 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
1488 if (NILP (Voverriding_local_map_menu_flag
))
1490 specbind (Qoverriding_terminal_local_map
, Qnil
);
1491 specbind (Qoverriding_local_map
, Qnil
);
1494 /* Run the Lucid hook. */
1495 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
1496 /* If it has changed current-menubar from previous value,
1497 really recompute the menubar from the value. */
1498 if (! NILP (Vlucid_menu_bar_dirty_flag
))
1499 call0 (Qrecompute_lucid_menubar
);
1500 safe_run_hooks (Qmenu_bar_update_hook
);
1501 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
1502 /* Redisplay the menu bar in case we changed it. */
1503 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1504 if (FRAME_WINDOW_P (f
))
1505 set_frame_menubar (f
, 0, 0);
1507 /* On a terminal screen, the menu bar is an ordinary screen
1508 line, and this makes it get updated. */
1509 w
->update_mode_line
= Qt
;
1510 #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1511 /* In the non-toolkit version, the menu bar is an ordinary screen
1512 line, and this makes it get updated. */
1513 w
->update_mode_line
= Qt
;
1514 #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1516 unbind_to (count
, Qnil
);
1517 set_buffer_internal_1 (prev
);
1524 /* Redisplay WINDOW and its subwindows and siblings. */
1527 redisplay_windows (window
, preserve_echo_area
)
1529 int preserve_echo_area
;
1531 for (; !NILP (window
); window
= XWINDOW (window
)->next
)
1532 redisplay_window (window
, 0, preserve_echo_area
);
1535 /* Return value in display table DP (Lisp_Char_Table *) for character
1536 C. Since a display table doesn't have any parent, we don't have to
1537 follow parent. Do not call this function directly but use the
1538 macro DISP_CHAR_VECTOR. */
1540 disp_char_vector (dp
, c
)
1541 struct Lisp_Char_Table
*dp
;
1547 if (SINGLE_BYTE_CHAR_P (c
)) return (dp
->contents
[c
]);
1549 SPLIT_NON_ASCII_CHAR (c
, code
[0], code
[1], code
[2]);
1550 if (code
[0] != CHARSET_COMPOSITION
)
1552 if (code
[1] < 32) code
[1] = -1;
1553 else if (code
[2] < 32) code
[2] = -1;
1555 /* Here, the possible range of CODE[0] (== charset ID) is
1556 128..MAX_CHARSET. Since the top level char table contains data
1557 for multibyte characters after 256th element, we must increment
1558 CODE[0] by 128 to get a correct index. */
1560 code
[3] = -1; /* anchor */
1562 for (i
= 0; code
[i
] >= 0; i
++, dp
= XCHAR_TABLE (val
))
1564 val
= dp
->contents
[code
[i
]];
1565 if (!SUB_CHAR_TABLE_P (val
))
1566 return (NILP (val
) ? dp
->defalt
: val
);
1568 /* Here, VAL is a sub char table. We return the default value of it. */
1569 return (dp
->defalt
);
1572 /* Redisplay window WINDOW and its subwindows. */
1575 redisplay_window (window
, just_this_one
, preserve_echo_area
)
1577 int just_this_one
, preserve_echo_area
;
1579 register struct window
*w
= XWINDOW (window
);
1580 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
1582 register int lpoint
= PT
;
1583 struct buffer
*old
= current_buffer
;
1584 register int width
= window_internal_width (w
) - 1;
1585 register int startp
;
1586 register int hscroll
= XINT (w
->hscroll
);
1587 struct position pos
;
1590 int update_mode_line
;
1591 struct Lisp_Char_Table
*dp
= window_display_table (w
);
1593 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1595 /* If this is a combination window, do its children; that's all. */
1597 if (!NILP (w
->vchild
))
1599 redisplay_windows (w
->vchild
, preserve_echo_area
);
1602 if (!NILP (w
->hchild
))
1604 redisplay_windows (w
->hchild
, preserve_echo_area
);
1607 if (NILP (w
->buffer
))
1610 height
= window_internal_height (w
);
1611 update_mode_line
= (!NILP (w
->update_mode_line
) || update_mode_lines
);
1612 if (XBUFFER (w
->buffer
)->clip_changed
)
1613 update_mode_line
= 1;
1615 if (MINI_WINDOW_P (w
))
1617 if (w
== XWINDOW (echo_area_window
) && echo_area_glyphs
)
1618 /* We've already displayed the echo area glyphs in this window. */
1619 goto finish_scroll_bars
;
1620 else if (w
!= XWINDOW (minibuf_window
))
1622 /* This is a minibuffer, but it's not the currently active one,
1624 int vpos
= XFASTINT (w
->top
);
1627 for (i
= 0; i
< height
; i
++)
1629 get_display_line (f
, vpos
+ i
, 0);
1630 display_string (w
, vpos
+ i
, "", 0,
1631 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
1635 goto finish_scroll_bars
;
1639 /* Otherwise set up data on this window; select its buffer and point value */
1641 if (update_mode_line
)
1642 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1644 set_buffer_temp (XBUFFER (w
->buffer
));
1648 /* If %c is in mode line, update it if needed. */
1649 if (!NILP (w
->column_number_displayed
)
1650 /* This alternative quickly identifies a common case
1651 where no change is needed. */
1652 && !(PT
== XFASTINT (w
->last_point
)
1653 && XFASTINT (w
->last_modified
) >= MODIFF
1654 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1655 && XFASTINT (w
->column_number_displayed
) != current_column ())
1656 update_mode_line
= 1;
1658 /* Count number of windows showing the selected buffer.
1659 An indirect buffer counts as its base buffer. */
1663 struct buffer
*current_base
, *window_base
;
1664 current_base
= current_buffer
;
1665 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
1666 if (current_base
->base_buffer
)
1667 current_base
= current_base
->base_buffer
;
1668 if (window_base
->base_buffer
)
1669 window_base
= window_base
->base_buffer
;
1670 if (current_base
== window_base
)
1674 /* POINT refers normally to the selected window.
1675 For any other window, set up appropriate value. */
1677 if (!EQ (window
, selected_window
))
1679 int new_pt
= marker_position (w
->pointm
);
1683 Fset_marker (w
->pointm
, make_number (new_pt
), Qnil
);
1685 else if (new_pt
> (ZV
- 1))
1688 Fset_marker (w
->pointm
, make_number (new_pt
), Qnil
);
1690 /* We don't use SET_PT so that the point-motion hooks don't run. */
1691 BUF_PT (current_buffer
) = new_pt
;
1694 /* If any of the character widths specified in the display table
1695 have changed, invalidate the width run cache. It's true that this
1696 may be a bit late to catch such changes, but the rest of
1697 redisplay goes (non-fatally) haywire when the display table is
1698 changed, so why should we worry about doing any better? */
1699 if (current_buffer
->width_run_cache
)
1701 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
1703 if (! disptab_matches_widthtab (disptab
,
1704 XVECTOR (current_buffer
->width_table
)))
1706 invalidate_region_cache (current_buffer
,
1707 current_buffer
->width_run_cache
,
1709 recompute_width_table (current_buffer
, disptab
);
1713 /* If window-start is screwed up, choose a new one. */
1714 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
1717 startp
= marker_position (w
->start
);
1719 /* If someone specified a new starting point but did not insist,
1720 check whether it can be used. */
1721 if (!NILP (w
->optional_new_start
))
1723 w
->optional_new_start
= Qnil
;
1724 /* Check whether this start pos is usable given where point is. */
1726 pos
= *compute_motion (startp
, 0,
1727 (((EQ (window
, minibuf_window
)
1729 ? minibuf_prompt_width
: 0)
1730 + (hscroll
? 1 - hscroll
: 0)),
1733 /* BUG FIX: See the comment of
1734 Fpos_visible_in_window_p (window.c). */
1735 - (1 << (BITS_PER_SHORT
- 1)),
1736 width
, hscroll
, pos_tab_offset (w
, startp
), w
);
1737 /* If PT does fit on the screen, we will use this start pos,
1738 so do so by setting force_start. */
1739 if (pos
.bufpos
== PT
)
1740 w
->force_start
= Qt
;
1743 /* Handle case where place to start displaying has been specified,
1744 unless the specified location is outside the accessible range. */
1745 if (!NILP (w
->force_start
))
1747 w
->force_start
= Qnil
;
1748 /* Forget any recorded base line for line number display. */
1749 w
->base_line_number
= Qnil
;
1750 /* Redisplay the mode line. Select the buffer properly for that.
1751 Also, run the hook window-scroll-functions
1752 because we have scrolled. */
1753 /* Note, we do this after clearing force_start because
1754 if there's an error, it is better to forget about force_start
1755 than to get into an infinite loop calling the hook functions
1756 and having them get more errors. */
1757 if (!update_mode_line
1758 || ! NILP (Vwindow_scroll_functions
))
1760 Lisp_Object temp
[3];
1762 set_buffer_temp (old
);
1763 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1764 update_mode_line
= 1;
1765 w
->update_mode_line
= Qt
;
1766 if (! NILP (Vwindow_scroll_functions
))
1768 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1769 make_number (startp
));
1770 startp
= marker_position (w
->start
);
1773 XSETFASTINT (w
->last_modified
, 0);
1774 XSETFASTINT (w
->last_overlay_modified
, 0);
1775 if (startp
< BEGV
) startp
= BEGV
;
1776 if (startp
> ZV
) startp
= ZV
;
1777 try_window (window
, startp
);
1778 if (cursor_vpos
< 0)
1780 /* If point does not appear, move point so it does appear */
1781 pos
= *compute_motion (startp
, 0,
1782 (((EQ (window
, minibuf_window
)
1784 ? minibuf_prompt_width
: 0)
1785 + (hscroll
? 1 - hscroll
: 0)),
1788 - (1 << (BITS_PER_SHORT
- 1)),
1789 width
, hscroll
, pos_tab_offset (w
, startp
), w
);
1790 BUF_PT (current_buffer
) = pos
.bufpos
;
1791 if (w
!= XWINDOW (selected_window
))
1792 Fset_marker (w
->pointm
, make_number (PT
), Qnil
);
1795 if (current_buffer
== old
)
1797 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
1798 + minmax (0, pos
.hpos
, width
));
1799 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1801 /* If we are highlighting the region,
1802 then we just changed the region, so redisplay to show it. */
1803 if (!NILP (Vtransient_mark_mode
)
1804 && !NILP (current_buffer
->mark_active
))
1806 cancel_my_columns (XWINDOW (window
));
1807 try_window (window
, startp
);
1813 /* Handle case where text has not changed, only point,
1814 and it has not moved off the frame. */
1816 /* This code is not used for minibuffer for the sake of
1817 the case of redisplaying to replace an echo area message;
1818 since in that case the minibuffer contents per se are usually unchanged.
1819 This code is of no real use in the minibuffer since
1820 the handling of this_line_bufpos, etc.,
1821 in redisplay handles the same cases. */
1823 if (XFASTINT (w
->last_modified
) >= MODIFF
1824 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
1825 && PT
>= startp
&& !current_buffer
->clip_changed
1826 && (just_this_one
|| WINDOW_FULL_WIDTH_P (w
))
1827 /* If force-mode-line-update was called, really redisplay;
1828 that's how redisplay is forced after e.g. changing
1829 buffer-invisibility-spec. */
1830 && NILP (w
->update_mode_line
)
1831 /* Can't use this case if highlighting a region. */
1832 && !(!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
1833 && NILP (w
->region_showing
)
1834 /* If end pos is out of date, scroll bar and percentage will be wrong */
1835 && INTEGERP (w
->window_end_vpos
)
1836 && XFASTINT (w
->window_end_vpos
) < XFASTINT (w
->height
)
1837 && !EQ (window
, minibuf_window
)
1838 && current_buffer
!= XMARKER (Voverlay_arrow_position
)->buffer
)
1840 int this_scroll_margin
= scroll_margin
;
1841 int last_point_y
= w
->last_point_y
- XINT (w
->top
);
1842 int last_point_x
= (w
->last_point_x
1843 + (hscroll
? 1 - hscroll
: 0)
1844 - WINDOW_LEFT_MARGIN (w
));
1846 /* Find where PT is located now on the frame. */
1847 /* Check just_this_one as a way of verifying that the
1848 window edges have not changed. */
1849 if (PT
== w
->last_point
&& just_this_one
)
1851 pos
.hpos
= last_point_x
;
1852 pos
.vpos
= last_point_y
;
1855 else if (PT
> w
->last_point
&& w
->last_point
> startp
&& just_this_one
)
1857 pos
= *compute_motion (w
->last_point
, last_point_y
, last_point_x
, 0,
1859 /* BUG FIX: See the comment of
1860 Fpos_visible_in_window_p (window.c). */
1861 - (1 << (BITS_PER_SHORT
- 1)),
1863 pos_tab_offset (w
, startp
), w
);
1867 pos
= *compute_motion (startp
, 0, (hscroll
? 1 - hscroll
: 0), 0,
1869 /* BUG FIX: See the comment of
1870 Fpos_visible_in_window_p (window.c). */
1871 - (1 << (BITS_PER_SHORT
- 1)),
1873 pos_tab_offset (w
, startp
), w
);
1876 /* Don't use a scroll margin that is negative or too large. */
1877 if (this_scroll_margin
< 0)
1878 this_scroll_margin
= 0;
1880 if (XINT (w
->height
) < 4 * scroll_margin
)
1881 this_scroll_margin
= XINT (w
->height
) / 4;
1883 /* If point fits on the screen, and not within the scroll margin,
1885 if (pos
.vpos
< height
- this_scroll_margin
1886 && (pos
.vpos
>= this_scroll_margin
|| startp
== BEGV
))
1888 /* Ok, point is still on frame */
1889 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
1891 /* These variables are supposed to be origin 1 */
1892 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
1893 + minmax (0, pos
.hpos
, width
));
1894 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1896 /* This doesn't do the trick, because if a window to the right of
1897 this one must be redisplayed, this does nothing because there
1898 is nothing in DesiredFrame yet, and then the other window is
1899 redisplayed, making likes that are empty in this window's columns.
1900 if (WINDOW_FULL_WIDTH_P (w))
1901 preserve_my_columns (w);
1905 /* Don't bother trying redisplay with same start;
1906 we already know it will lose */
1908 /* If current starting point was originally the beginning of a line
1909 but no longer is, find a new starting point. */
1910 else if (!NILP (w
->start_at_line_beg
)
1912 || FETCH_BYTE (startp
- 1) == '\n'))
1916 else if (just_this_one
&& !MINI_WINDOW_P (w
)
1918 && XFASTINT (w
->last_modified
)
1919 /* or else vmotion on first line won't work. */
1920 && ! NILP (w
->start_at_line_beg
)
1921 && ! EQ (w
->window_end_valid
, Qnil
)
1922 && do_id
&& !current_buffer
->clip_changed
1923 && !blank_end_of_window
1924 && WINDOW_FULL_WIDTH_P (w
)
1925 /* Can't use this case if highlighting a region. */
1926 && !(!NILP (Vtransient_mark_mode
)
1927 && !NILP (current_buffer
->mark_active
))
1928 /* Don't use try_window_id if newline
1929 doesn't display as the end of a line. */
1930 && !(dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, '\n')))
1931 && NILP (w
->region_showing
)
1932 && EQ (last_arrow_position
, COERCE_MARKER (Voverlay_arrow_position
))
1933 && EQ (last_arrow_string
, Voverlay_arrow_string
)
1934 && (tem
= try_window_id (FRAME_SELECTED_WINDOW (f
)))
1937 /* tem > 0 means success. tem == -1 means choose new start.
1938 tem == -2 means try again with same start,
1939 and nothing but whitespace follows the changed stuff.
1940 tem == 0 means try again with same start. */
1944 else if (startp
>= BEGV
&& startp
<= ZV
1946 /* Avoid starting at end of buffer. */
1947 #if 0 /* This change causes trouble for M-! finger & RET.
1948 It will have to be considered later. */
1949 || ! EQ (window
, selected_window
)
1950 /* Don't do the recentering if redisplay
1951 is not for no user action. */
1952 || preserve_echo_area
1955 || (XFASTINT (w
->last_modified
) >= MODIFF
1956 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
1958 /* Try to redisplay starting at same place as before */
1959 /* If point has not moved off frame, accept the results */
1960 try_window (window
, startp
);
1961 if (cursor_vpos
>= 0)
1963 if (!just_this_one
|| current_buffer
->clip_changed
1964 || beg_unchanged
< startp
)
1965 /* Forget any recorded base line for line number display. */
1966 w
->base_line_number
= Qnil
;
1970 cancel_my_columns (w
);
1973 XSETFASTINT (w
->last_modified
, 0);
1974 XSETFASTINT (w
->last_overlay_modified
, 0);
1975 /* Redisplay the mode line. Select the buffer properly for that. */
1976 if (!update_mode_line
)
1978 set_buffer_temp (old
);
1979 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1980 update_mode_line
= 1;
1981 w
->update_mode_line
= Qt
;
1984 /* Try to scroll by specified few lines */
1986 if (scroll_conservatively
&& !current_buffer
->clip_changed
1987 && startp
>= BEGV
&& startp
<= ZV
)
1989 int this_scroll_margin
= scroll_margin
;
1991 /* Don't use a scroll margin that is negative or too large. */
1992 if (this_scroll_margin
< 0)
1993 this_scroll_margin
= 0;
1995 if (XINT (w
->height
) < 4 * scroll_margin
)
1996 this_scroll_margin
= XINT (w
->height
) / 4;
1998 if (PT
>= Z
- XFASTINT (w
->window_end_pos
))
2000 struct position pos
;
2001 pos
= *compute_motion (Z
- XFASTINT (w
->window_end_pos
), 0, 0, 0,
2002 PT
, XFASTINT (w
->height
), 0,
2003 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2004 pos_tab_offset (w
, startp
), w
);
2005 if (pos
.vpos
> scroll_conservatively
)
2008 pos
= *vmotion (startp
, pos
.vpos
+ 1 + this_scroll_margin
, w
);
2010 if (! NILP (Vwindow_scroll_functions
))
2012 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
2013 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2014 make_number (pos
.bufpos
));
2015 pos
.bufpos
= marker_position (w
->start
);
2017 try_window (window
, pos
.bufpos
);
2018 if (cursor_vpos
>= 0)
2020 if (!just_this_one
|| current_buffer
->clip_changed
2021 || beg_unchanged
< startp
)
2022 /* Forget any recorded base line for line number display. */
2023 w
->base_line_number
= Qnil
;
2027 cancel_my_columns (w
);
2031 struct position pos
;
2032 pos
= *compute_motion (PT
, 0, 0, 0,
2033 startp
, XFASTINT (w
->height
), 0,
2034 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2035 pos_tab_offset (w
, startp
), w
);
2036 if (pos
.vpos
> scroll_conservatively
)
2039 pos
= *vmotion (startp
, - pos
.vpos
- this_scroll_margin
, w
);
2041 if (! NILP (Vwindow_scroll_functions
))
2043 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
2044 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2045 make_number (pos
.bufpos
));
2046 pos
.bufpos
= marker_position (w
->start
);
2048 try_window (window
, pos
.bufpos
);
2049 if (cursor_vpos
>= 0)
2051 if (!just_this_one
|| current_buffer
->clip_changed
2052 || beg_unchanged
< startp
)
2053 /* Forget any recorded base line for line number display. */
2054 w
->base_line_number
= Qnil
;
2058 cancel_my_columns (w
);
2063 if (scroll_step
&& !current_buffer
->clip_changed
2064 && startp
>= BEGV
&& startp
<= ZV
)
2068 pos
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), scroll_step
, w
);
2069 if (pos
.vpos
>= height
)
2073 pos
= *vmotion (startp
, (PT
< startp
? - scroll_step
: scroll_step
), w
);
2075 if (PT
>= pos
.bufpos
)
2077 if (! NILP (Vwindow_scroll_functions
))
2079 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
2080 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2081 make_number (pos
.bufpos
));
2082 pos
.bufpos
= marker_position (w
->start
);
2084 try_window (window
, pos
.bufpos
);
2085 if (cursor_vpos
>= 0)
2087 if (!just_this_one
|| current_buffer
->clip_changed
2088 || beg_unchanged
< startp
)
2089 /* Forget any recorded base line for line number display. */
2090 w
->base_line_number
= Qnil
;
2094 cancel_my_columns (w
);
2099 /* Finally, just choose place to start which centers point */
2102 /* Forget any previously recorded base line for line number display. */
2103 w
->base_line_number
= Qnil
;
2105 pos
= *vmotion (PT
, - (height
/ 2), w
);
2106 /* Set startp here explicitly in case that helps avoid an infinite loop
2107 in case the window-scroll-functions functions get errors. */
2108 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
2109 if (! NILP (Vwindow_scroll_functions
))
2111 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2112 make_number (pos
.bufpos
));
2113 pos
.bufpos
= marker_position (w
->start
);
2115 try_window (window
, pos
.bufpos
);
2117 startp
= marker_position (w
->start
);
2118 w
->start_at_line_beg
2119 = (startp
== BEGV
|| FETCH_BYTE (startp
- 1) == '\n') ? Qt
: Qnil
;
2122 if ((update_mode_line
2123 /* If window not full width, must redo its mode line
2124 if the window to its side is being redone */
2125 || (!just_this_one
&& !WINDOW_FULL_WIDTH_P (w
))
2126 || INTEGERP (w
->base_line_pos
)
2127 || (!NILP (w
->column_number_displayed
)
2128 && XFASTINT (w
->column_number_displayed
) != current_column ()))
2129 && height
!= XFASTINT (w
->height
))
2130 display_mode_line (w
);
2131 if (! line_number_displayed
2132 && ! BUFFERP (w
->base_line_pos
))
2134 w
->base_line_pos
= Qnil
;
2135 w
->base_line_number
= Qnil
;
2138 /* When we reach a frame's selected window, redo the frame's menu bar. */
2139 if (update_mode_line
2140 && (FRAME_WINDOW_P (f
)
2142 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
2143 FRAME_EXTERNAL_MENU_BAR (f
)
2145 FRAME_MENU_BAR_LINES (f
) > 0
2147 : FRAME_MENU_BAR_LINES (f
) > 0)
2148 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
2149 display_menu_bar (w
);
2152 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2154 int start
, end
, whole
;
2156 /* Calculate the start and end positions for the current window.
2157 At some point, it would be nice to choose between scrollbars
2158 which reflect the whole buffer size, with special markers
2159 indicating narrowing, and scrollbars which reflect only the
2162 Note that minibuffers sometimes aren't displaying any text. */
2163 if (! MINI_WINDOW_P (w
)
2164 || (w
== XWINDOW (minibuf_window
) && ! echo_area_glyphs
))
2167 start
= marker_position (w
->start
) - BEGV
;
2168 /* I don't think this is guaranteed to be right. For the
2169 moment, we'll pretend it is. */
2170 end
= (Z
- XINT (w
->window_end_pos
)) - BEGV
;
2172 if (end
< start
) end
= start
;
2173 if (whole
< (end
- start
)) whole
= end
- start
;
2176 start
= end
= whole
= 0;
2178 /* Indicate what this scroll bar ought to be displaying now. */
2179 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
2181 /* Note that we actually used the scroll bar attached to this window,
2182 so it shouldn't be deleted at the end of redisplay. */
2183 (*redeem_scroll_bar_hook
) (w
);
2186 BUF_PT (current_buffer
) = opoint
;
2187 if (update_mode_line
)
2188 set_buffer_internal_1 (old
);
2190 set_buffer_temp (old
);
2191 BUF_PT (current_buffer
) = lpoint
;
2194 /* Do full redisplay on one window, starting at position `pos'. */
2197 try_window (window
, pos
)
2201 register struct window
*w
= XWINDOW (window
);
2202 register int height
= window_internal_height (w
);
2203 register int vpos
= XFASTINT (w
->top
);
2204 register int last_text_vpos
= vpos
;
2205 FRAME_PTR f
= XFRAME (w
->frame
);
2206 int width
= window_internal_width (w
) - 1;
2207 struct position val
;
2209 /* POS should never be out of range! */
2210 if (pos
< XBUFFER (w
->buffer
)->begv
2211 || pos
> XBUFFER (w
->buffer
)->zv
)
2214 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2216 overlay_arrow_seen
= 0;
2217 zv_strings_seen
= 0;
2218 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
2219 val
.ovstring_chars_done
= 0;
2220 val
.tab_offset
= pos_tab_offset (w
, pos
);
2222 while (--height
>= 0)
2224 val
= *display_text_line (w
, pos
, vpos
, val
.hpos
, val
.tab_offset
,
2225 val
.ovstring_chars_done
);
2226 /* The following code is omitted because we maintain tab_offset
2229 tab_offset
+= width
;
2230 if (val
.vpos
) tab_offset
= 0;
2233 if (pos
!= val
.bufpos
)
2236 #ifdef USE_TEXT_PROPERTIES
2237 Lisp_Object invis_prop
;
2238 invis_prop
= Fget_char_property (val
.bufpos
-1, Qinvisible
, window
);
2239 invis
= TEXT_PROP_MEANS_INVISIBLE (invis_prop
);
2243 /* Next line, unless prev line ended in end of buffer with no cr */
2245 && (FETCH_BYTE (val
.bufpos
- 1) != '\n' || invis
));
2250 /* If last line is continued in middle of character,
2251 include the split character in the text considered on the frame */
2252 if (val
.hpos
< (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
2255 /* If bottom just moved off end of frame, change mode line percentage. */
2256 if (XFASTINT (w
->window_end_pos
) == 0
2258 w
->update_mode_line
= Qt
;
2260 /* Say where last char on frame will be, once redisplay is finished. */
2261 XSETFASTINT (w
->window_end_pos
, Z
- pos
);
2262 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
- XFASTINT (w
->top
));
2263 /* But that is not valid info until redisplay finishes. */
2264 w
->window_end_valid
= Qnil
;
2267 /* Try to redisplay when buffer is modified locally,
2268 computing insert/delete line to preserve text outside
2269 the bounds of the changes.
2270 Return 1 if successful, 0 if if cannot tell what to do,
2271 or -1 to tell caller to find a new window start,
2272 or -2 to tell caller to do normal redisplay with same window start. */
2275 try_window_id (window
)
2279 register struct window
*w
= XWINDOW (window
);
2280 register int height
= window_internal_height (w
);
2281 FRAME_PTR f
= XFRAME (w
->frame
);
2282 int top
= XFASTINT (w
->top
);
2283 int start
= marker_position (w
->start
);
2284 int width
= window_internal_width (w
) - 1;
2285 int hscroll
= XINT (w
->hscroll
);
2286 int lmargin
= hscroll
> 0 ? 1 - hscroll
: 0;
2289 register int i
, tem
;
2290 int last_text_vpos
= 0;
2292 int selective
= (INTEGERP (current_buffer
->selective_display
)
2293 ? XINT (current_buffer
->selective_display
)
2294 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2296 struct position val
, bp
, ep
, xp
, pp
;
2297 int scroll_amount
= 0;
2301 if (GPT
- BEG
< beg_unchanged
)
2302 beg_unchanged
= GPT
- BEG
;
2303 if (Z
- GPT
< end_unchanged
)
2304 end_unchanged
= Z
- GPT
;
2306 if (beg_unchanged
+ BEG
< start
)
2307 return 0; /* Give up if changes go above top of window */
2309 /* Find position before which nothing is changed. */
2310 bp
= *compute_motion (start
, 0, lmargin
, 0,
2311 min (ZV
, beg_unchanged
+ BEG
), height
,
2312 /* BUG FIX: See the comment of
2313 Fpos_visible_in_window_p() (window.c). */
2314 - (1 << (BITS_PER_SHORT
- 1)),
2315 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2316 if (bp
.vpos
>= height
)
2320 /* All changes are beyond the window end, and point is on the screen.
2321 We don't need to change the text at all.
2322 But we need to update window_end_pos to account for
2323 any change in buffer size. */
2324 bp
= *compute_motion (start
, 0, lmargin
, 0,
2326 /* BUG FIX: See the comment of
2327 Fpos_visible_in_window_p() (window.c). */
2328 - (1 << (BITS_PER_SHORT
- 1)),
2329 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2330 XSETFASTINT (w
->window_end_vpos
, height
);
2331 XSETFASTINT (w
->window_end_pos
, Z
- bp
.bufpos
);
2339 /* Find beginning of that frame line. Must display from there. */
2340 bp
= *vmotion (bp
.bufpos
, 0, w
);
2348 /* If about to start displaying at the beginning of a continuation line,
2349 really start with previous frame line, in case it was not
2350 continued when last redisplayed */
2351 if ((bp
.contin
&& bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0)
2353 /* Likewise if we have to worry about selective display. */
2354 (selective
> 0 && bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0))
2356 bp
= *vmotion (bp
.bufpos
, -1, w
);
2360 val
.tab_offset
= bp
.tab_offset
; /* Update tab offset. */
2362 if (bp
.contin
&& bp
.hpos
!= lmargin
)
2364 val
.hpos
= bp
.prevhpos
- width
+ lmargin
;
2365 val
.tab_offset
= bp
.tab_offset
+ bp
.prevhpos
- width
;
2372 /* Find first visible newline after which no more is changed. */
2373 tem
= find_next_newline (Z
- max (end_unchanged
, Z
- ZV
), 1);
2375 while (tem
< ZV
- 1 && (indented_beyond_p (tem
, selective
)))
2376 tem
= find_next_newline (tem
, 1);
2378 /* Compute the cursor position after that newline. */
2379 ep
= *compute_motion (pos
, vpos
, val
.hpos
, did_motion
, tem
,
2380 height
, - (1 << (BITS_PER_SHORT
- 1)),
2382 /* We have tab offset in VAL, use it. */
2385 /* If changes reach past the text available on the frame,
2386 just display rest of frame. */
2387 if (ep
.bufpos
> Z
- XFASTINT (w
->window_end_pos
))
2390 stop_vpos
= ep
.vpos
;
2392 /* If no newline before ep, the line ep is on includes some changes
2393 that must be displayed. Make sure we don't stop before it. */
2394 /* Also, if changes reach all the way until ep.bufpos,
2395 it is possible that something was deleted after the
2396 newline before it, so the following line must be redrawn. */
2397 if (stop_vpos
== ep
.vpos
2398 && (ep
.bufpos
== BEGV
2399 || FETCH_BYTE (ep
.bufpos
- 1) != '\n'
2400 || ep
.bufpos
== Z
- end_unchanged
))
2401 stop_vpos
= ep
.vpos
+ 1;
2404 overlay_arrow_seen
= 0;
2405 zv_strings_seen
= 0;
2407 /* If changes do not reach to bottom of window,
2408 figure out how much to scroll the rest of the window */
2409 if (stop_vpos
< height
)
2411 /* Now determine how far up or down the rest of the window has moved */
2412 xp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2413 Z
- XFASTINT (w
->window_end_pos
),
2414 /* Don't care for VPOS... */
2415 1 << (BITS_PER_SHORT
- 1),
2417 1 << (BITS_PER_SHORT
- 1),
2418 width
, hscroll
, ep
.tab_offset
, w
);
2419 scroll_amount
= xp
.vpos
- XFASTINT (w
->window_end_vpos
);
2421 /* Is everything on frame below the changes whitespace?
2422 If so, no scrolling is really necessary. */
2423 for (i
= ep
.bufpos
; i
< xp
.bufpos
; i
++)
2425 tem
= FETCH_BYTE (i
);
2426 if (tem
!= ' ' && tem
!= '\n' && tem
!= '\t')
2432 XSETFASTINT (w
->window_end_vpos
,
2433 XFASTINT (w
->window_end_vpos
) + scroll_amount
);
2435 /* Before doing any scrolling, verify that point will be on frame. */
2436 if (PT
> ep
.bufpos
&& !(PT
<= xp
.bufpos
&& xp
.vpos
< height
))
2438 if (PT
<= xp
.bufpos
)
2440 pp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2441 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2443 /* We have tab offset in EP, use it. */
2448 pp
= *compute_motion (xp
.bufpos
, xp
.vpos
, xp
.hpos
, 1,
2449 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2451 /* We have tab offset in XP, use it. */
2454 if (pp
.bufpos
< PT
|| pp
.vpos
== height
)
2456 cursor_vpos
= pp
.vpos
+ top
;
2457 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, pp
.hpos
, width
);
2460 if (stop_vpos
- scroll_amount
>= height
2461 || ep
.bufpos
== xp
.bufpos
)
2463 if (scroll_amount
< 0)
2464 stop_vpos
-= scroll_amount
;
2466 /* In this path, we have altered window_end_vpos
2467 and not left it negative.
2468 We must make sure that, in case display is preempted
2469 before the frame changes to reflect what we do here,
2470 further updates will not come to try_window_id
2471 and assume the frame and window_end_vpos match. */
2472 blank_end_of_window
= 1;
2474 else if (!scroll_amount
)
2476 /* Even if we don't need to scroll, we must adjust the
2477 charstarts of subsequent lines (that we won't redisplay)
2478 according to the amount of text inserted or deleted. */
2479 int oldpos
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2480 int adjust
= ep
.bufpos
- oldpos
;
2481 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1, adjust
);
2483 else if (bp
.bufpos
== Z
- end_unchanged
)
2485 /* If reprinting everything is nearly as fast as scrolling,
2486 don't bother scrolling. Can happen if lines are short. */
2487 if (scroll_cost (f
, bp
.vpos
+ top
- scroll_amount
,
2488 top
+ height
- max (0, scroll_amount
),
2490 > xp
.bufpos
- bp
.bufpos
- 20)
2491 /* Return "try normal display with same window-start."
2492 Too bad we can't prevent further scroll-thinking. */
2494 /* If pure deletion, scroll up as many lines as possible.
2495 In common case of killing a line, this can save the
2496 following line from being overwritten by scrolling
2497 and therefore having to be redrawn. */
2498 tem
= scroll_frame_lines (f
, bp
.vpos
+ top
- scroll_amount
,
2499 top
+ height
- max (0, scroll_amount
),
2500 scroll_amount
, bp
.bufpos
);
2505 /* scroll_frame_lines did not properly adjust subsequent
2506 lines' charstarts in the case where the text of the
2507 screen line at bp.vpos has changed.
2508 (This can happen in a deletion that ends in mid-line.)
2509 To adjust properly, we need to make things consistent
2511 So do a second adjust to make that happen.
2512 Note that stop_vpos >= ep.vpos, so it is sufficient
2513 to update the charstarts for lines at ep.vpos and below. */
2515 = FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2516 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1,
2517 ep
.bufpos
- oldstart
);
2520 else if (scroll_amount
)
2522 /* If reprinting everything is nearly as fast as scrolling,
2523 don't bother scrolling. Can happen if lines are short. */
2524 /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an
2525 overestimate of cost of reprinting, since xp.bufpos
2526 would end up below the bottom of the window. */
2527 if (scroll_cost (f
, ep
.vpos
+ top
- scroll_amount
,
2528 top
+ height
- max (0, scroll_amount
),
2530 > xp
.bufpos
- ep
.bufpos
- 20)
2531 /* Return "try normal display with same window-start."
2532 Too bad we can't prevent further scroll-thinking. */
2534 tem
= scroll_frame_lines (f
, ep
.vpos
+ top
- scroll_amount
,
2535 top
+ height
- max (0, scroll_amount
),
2536 scroll_amount
, ep
.bufpos
);
2537 if (!tem
) stop_vpos
= height
;
2541 /* In any case, do not display past bottom of window */
2542 if (stop_vpos
>= height
)
2548 /* Handle case where pos is before w->start --
2549 can happen if part of line had been clipped and is not clipped now */
2550 if (vpos
== 0 && pos
< marker_position (w
->start
))
2551 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2553 /* Redisplay the lines where the text was changed */
2554 last_text_vpos
= vpos
;
2555 /* The following code is omitted because we maintain tab offset in
2558 tab_offset
= pos_tab_offset (w
, pos
);
2559 /* If we are starting display in mid-character, correct tab_offset
2560 to account for passing the line that that character really starts in. */
2561 if (val
.hpos
< lmargin
)
2562 tab_offset
+= width
;
2565 while (vpos
< stop_vpos
)
2567 val
= *display_text_line (w
, pos
, top
+ vpos
++, val
.hpos
, val
.tab_offset
,
2568 val
.ovstring_chars_done
);
2569 /* If display_text_line ran a hook and changed some text,
2570 redisplay all the way to bottom of buffer
2571 So that we show the changes. */
2572 if (old_tick
!= MODIFF
)
2574 /* The following code is omitted because we maintain tab offset
2575 in val.tab_offset. */
2577 tab_offset
+= width
;
2578 if (val
.vpos
) tab_offset
= 0;
2580 if (pos
!= val
.bufpos
)
2582 /* Next line, unless prev line ended in end of buffer with no cr */
2583 = vpos
- (val
.vpos
&& FETCH_BYTE (val
.bufpos
- 1) != '\n');
2587 /* There are two cases:
2588 1) we have displayed down to the bottom of the window
2589 2) we have scrolled lines below stop_vpos by scroll_amount */
2593 /* If last line is continued in middle of character,
2594 include the split character in the text considered on the frame */
2595 if (val
.hpos
< lmargin
)
2597 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
);
2598 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2601 /* If scrolling made blank lines at window bottom,
2602 redisplay to fill those lines */
2603 if (scroll_amount
< 0)
2605 /* Don't consider these lines for general-purpose scrolling.
2606 That will save time in the scrolling computation. */
2607 FRAME_SCROLL_BOTTOM_VPOS (f
) = xp
.vpos
;
2611 val
.tab_offset
= xp
.tab_offset
;
2613 { /* Display from next line */
2614 vpos
= height
+ scroll_amount
;
2618 else if (xp
.contin
&& xp
.hpos
!= lmargin
)
2620 val
.hpos
= xp
.prevhpos
- width
+ lmargin
;
2621 val
.tab_offset
= xp
.tab_offset
+ bp
.prevhpos
- width
;
2625 blank_end_of_window
= 1;
2626 /* The following code is omitted because we maintain tab offset
2627 in val.tab_offset. */
2629 tab_offset
= pos_tab_offset (w
, pos
);
2630 /* If we are starting display in mid-character, correct tab_offset
2631 to account for passing the line that that character starts in. */
2632 if (val
.hpos
< lmargin
)
2633 tab_offset
+= width
;
2635 while (vpos
< height
)
2637 val
= *display_text_line (w
, pos
, top
+ vpos
++, val
.hpos
,
2638 val
.tab_offset
, val
.ovstring_chars_done
);
2639 /* The following code is omitted because we maintain tab
2640 offset in val.tab_offset. */
2642 tab_offset
+= width
;
2643 if (val
.vpos
) tab_offset
= 0;
2648 /* Here is a case where display_text_line sets cursor_vpos wrong.
2649 Make it be fixed up, below. */
2655 /* If bottom just moved off end of frame, change mode line percentage. */
2656 if (XFASTINT (w
->window_end_pos
) == 0
2658 w
->update_mode_line
= Qt
;
2660 /* Attempt to adjust end-of-text positions to new bottom line */
2663 delta
= height
- xp
.vpos
;
2665 || (delta
> 0 && xp
.bufpos
<= ZV
)
2666 || (delta
== 0 && xp
.hpos
))
2668 val
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), delta
, w
);
2669 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2670 XSETFASTINT (w
->window_end_vpos
,
2671 XFASTINT (w
->window_end_vpos
) + val
.vpos
);
2675 w
->window_end_valid
= Qnil
;
2677 /* If point was not in a line that was displayed, find it */
2678 if (cursor_vpos
< 0)
2681 val
= *compute_motion (start
, 0, lmargin
, 0, PT
,
2682 /* Don't care for VPOS... */
2683 1 << (BITS_PER_SHORT
- 1),
2685 1 << (BITS_PER_SHORT
- 1),
2686 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2687 /* Admit failure if point is off frame now */
2688 if (val
.vpos
>= height
)
2690 for (vpos
= 0; vpos
< height
; vpos
++)
2691 cancel_line (vpos
+ top
, f
);
2694 cursor_vpos
= val
.vpos
+ top
;
2695 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, val
.hpos
, width
);
2698 FRAME_CURSOR_X (f
) = cursor_hpos
;
2699 FRAME_CURSOR_Y (f
) = cursor_vpos
;
2703 val
= *compute_motion (start
, 0, lmargin
, 0, ZV
,
2704 height
, - (1 << (BITS_PER_SHORT
- 1)),
2705 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2706 if (val
.vpos
!= XFASTINT (w
->window_end_vpos
))
2708 if (XFASTINT (w
->window_end_pos
)
2716 /* Copy LEN glyphs starting address FROM to the rope TO.
2717 But don't actually copy the parts that would come in before S.
2718 Value is TO, advanced past the copied data.
2719 F is the frame we are displaying in. */
2722 copy_part_of_rope (f
, to
, s
, from
, len
, face
)
2724 register GLYPH
*to
; /* Copy to here. */
2725 register GLYPH
*s
; /* Starting point. */
2726 Lisp_Object
*from
; /* Data to copy. */
2728 int face
; /* Face to apply to glyphs which don't specify one. */
2731 register Lisp_Object
*fp
= from
;
2732 /* These cache the results of the last call to compute_glyph_face. */
2734 int last_merged
= 0;
2737 if (! FRAME_TERMCAP_P (f
))
2740 GLYPH glyph
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
2742 unsigned int c
= FAST_GLYPH_CHAR (glyph
);
2745 /* For an invalid character code, use space. */
2748 if (FAST_GLYPH_FACE (glyph
) == 0)
2749 /* If GLYPH has no face code, use FACE. */
2751 else if (FAST_GLYPH_FACE (glyph
) == last_code
)
2752 /* If it's same as previous glyph, use same result. */
2753 facecode
= last_merged
;
2756 /* Merge this glyph's face and remember the result. */
2757 last_code
= FAST_GLYPH_FACE (glyph
);
2758 last_merged
= facecode
= compute_glyph_face (f
, last_code
, face
);
2762 *to
= FAST_MAKE_GLYPH (c
, facecode
);
2770 if (to
>= s
) *to
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
2777 /* Correct a glyph by replacing its specified user-level face code
2778 with a displayable computed face code. */
2781 fix_glyph (f
, glyph
, cface
)
2787 if (! FRAME_TERMCAP_P (f
))
2789 if (FAST_GLYPH_FACE (glyph
) != 0)
2790 cface
= compute_glyph_face (f
, FAST_GLYPH_FACE (glyph
), cface
);
2791 glyph
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), cface
);
2797 /* Display one line of window W, starting at position START in W's buffer.
2799 Display starting at horizontal position HPOS, expressed relative to
2800 W's left edge. In situations where the text at START shouldn't
2801 start at the left margin (i.e. when the window is hscrolled, or
2802 we're continuing a line which left off in the midst of a
2803 multi-column character), HPOS should be negative; we throw away
2804 characters up 'til hpos = 0. So, HPOS must take hscrolling into
2807 TABOFFSET is an offset for ostensible hpos, used in tab stop calculations.
2809 OVSTR_DONE is the number of chars of overlay before/after strings
2810 at this position which have already been processed.
2812 Display on position VPOS on the frame. It is origin 0, relative to
2813 the top of the frame, not W.
2815 Returns a STRUCT POSITION giving character to start next line with
2816 and where to display it, including a zero or negative hpos.
2817 The vpos field is not really a vpos; it is 1 unless the line is continued */
2819 struct position val_display_text_line
;
2821 static struct position
*
2822 display_text_line (w
, start
, vpos
, hpos
, taboffset
, ovstr_done
)
2830 register int pos
= start
;
2834 register unsigned char *p
;
2836 register GLYPH
*leftmargin
;
2837 register GLYPH
*p1prev
;
2838 register GLYPH
*p1start
;
2841 FRAME_PTR f
= XFRAME (w
->frame
);
2842 int tab_width
= XINT (current_buffer
->tab_width
);
2843 int ctl_arrow
= !NILP (current_buffer
->ctl_arrow
);
2844 int width
= window_internal_width (w
) - 1;
2845 struct position val
;
2848 int last_invis_skip
= 0;
2849 Lisp_Object last_invis_prop
;
2850 int hscroll
= XINT (w
->hscroll
);
2851 int truncate
= (hscroll
2852 || (truncate_partial_width_windows
2853 && !WINDOW_FULL_WIDTH_P (w
))
2854 || !NILP (current_buffer
->truncate_lines
));
2856 /* 1 if we should highlight the region. */
2857 int highlight_region
2858 = (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
)
2859 && (XWINDOW (current_buffer
->last_selected_window
) == w
2860 || highlight_nonselected_windows
));
2861 int region_beg
, region_end
;
2863 int selective
= (INTEGERP (current_buffer
->selective_display
)
2864 ? XINT (current_buffer
->selective_display
)
2865 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2866 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
2867 register struct Lisp_Char_Table
*dp
= window_display_table (w
);
2869 Lisp_Object default_invis_vector
[3];
2870 /* Number of characters of ellipsis to display after an invisible line
2871 if it calls for an ellipsis.
2872 Note that this value can be nonzero regardless of whether
2873 selective display is enabled--you must check that separately. */
2875 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
2876 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->size
2877 : !NILP (current_buffer
->selective_display_ellipses
) ? 3 : 0);
2878 /* This is the sequence of Lisp objects to display
2879 when there are invisible lines. */
2880 Lisp_Object
*invis_vector_contents
2881 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
2882 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->contents
2883 : default_invis_vector
);
2885 GLYPH truncator
= (dp
== 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp
))
2886 || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp
)))
2887 ? '$' : XINT (DISP_TRUNC_GLYPH (dp
)));
2888 GLYPH continuer
= (dp
== 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp
))
2889 || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp
)))
2890 ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp
)));
2892 /* If 1, we must handle multibyte characters. */
2893 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
2894 /* Length of multibyte form of each character. */
2896 /* Glyphs generated should be set this bit mask if text must be
2897 displayed from right to left. */
2898 GLYPH rev_dir_bit
= (NILP (current_buffer
->direction_reversed
)
2899 ? 0 : GLYPH_MASK_REV_DIR
);
2901 /* The next buffer location at which the face should change, due
2902 to overlays or text property changes. */
2903 int next_face_change
;
2905 /* The next location where the `invisible' property changes, or an
2906 overlay starts or ends. */
2909 /* The face we're currently using. */
2910 int current_face
= 0;
2913 XSETFASTINT (default_invis_vector
[2], '.');
2914 default_invis_vector
[0] = default_invis_vector
[1] = default_invis_vector
[2];
2916 hpos
+= WINDOW_LEFT_MARGIN (w
);
2917 get_display_line (f
, vpos
, WINDOW_LEFT_MARGIN (w
));
2918 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
2920 /* Show where to highlight the region. */
2921 if (highlight_region
&& XMARKER (current_buffer
->mark
)->buffer
!= 0
2922 /* Maybe highlight only in selected window. */
2923 && (highlight_nonselected_windows
2924 || w
== XWINDOW (selected_window
)))
2926 region_beg
= marker_position (current_buffer
->mark
);
2927 if (PT
< region_beg
)
2929 region_end
= region_beg
;
2934 w
->region_showing
= Qt
;
2938 region_beg
= region_end
= -1;
2939 w
->region_showing
= Qnil
;
2942 if (MINI_WINDOW_P (w
)
2944 && vpos
== XFASTINT (w
->top
))
2946 if (! NILP (minibuf_prompt
))
2948 int old_width
= minibuf_prompt_width
;
2950 minibuf_prompt_width
2951 = (display_string (w
, vpos
, XSTRING (minibuf_prompt
)->data
,
2952 XSTRING (minibuf_prompt
)->size
, hpos
,
2953 /* Display a space if we truncate. */
2956 /* Truncate the prompt a little before the
2957 margin, so user input can at least start
2958 on the first line. */
2959 (XFASTINT (w
->width
) > 10
2960 ? XFASTINT (w
->width
) - 4 : -1))
2962 hpos
+= minibuf_prompt_width
;
2963 taboffset
-= minibuf_prompt_width
- old_width
;
2966 minibuf_prompt_width
= 0;
2969 /* If we're hscrolled at all, use compute_motion to skip over any
2970 text off the left edge of the window. compute_motion may know
2971 tricks to do this faster than we can. */
2974 struct position
*left_edge
2975 = compute_motion (pos
, vpos
, hpos
, 0,
2977 width
, hscroll
, taboffset
, w
);
2979 /* Retrieve the buffer position and column provided by
2980 compute_motion. We can't assume that the column will be
2981 zero, because you may have multi-column characters crossing
2984 compute_motion may have moved us past the screen position we
2985 requested, if we hit a multi-column character, or the end of
2986 the line. If so, back up. */
2987 if (left_edge
->vpos
> vpos
2988 || left_edge
->hpos
> 0)
2990 pos
= left_edge
->bufpos
;
2991 /* Since this should not be a valid multibyte character, we
2992 can decrease POS by 1. */
2994 hpos
= left_edge
->prevhpos
;
2998 pos
= left_edge
->bufpos
;
2999 hpos
= left_edge
->hpos
;
3003 desired_glyphs
->bufp
[vpos
] = start
;
3004 p1
= desired_glyphs
->glyphs
[vpos
] + hpos
;
3006 charstart
= desired_glyphs
->charstarts
[vpos
] + hpos
;
3007 /* In case we don't ever write anything into it... */
3008 desired_glyphs
->charstarts
[vpos
][WINDOW_LEFT_MARGIN (w
)] = -1;
3009 leftmargin
= desired_glyphs
->glyphs
[vpos
] + WINDOW_LEFT_MARGIN (w
);
3010 endp
= leftmargin
+ width
;
3012 /* Arrange the overlays nicely for our purposes. Usually, we call
3013 display_text_line on only one line at a time, in which case this
3014 can't really hurt too much, or we call it on lines which appear
3015 one after another in the buffer, in which case all calls to
3016 recenter_overlay_lists but the first will be pretty cheap. */
3017 recenter_overlay_lists (current_buffer
, pos
);
3019 /* Loop generating characters.
3020 Stop at end of buffer, before newline,
3021 if reach or pass continuation column,
3022 or at face change. */
3024 next_face_change
= pos
;
3025 next_boundary
= pos
;
3029 /* If the window is hscrolled and point is in the invisible part of the
3030 current line beyond the left margin we can record the cursor location
3032 if (hscroll
&& start
<= PT
&& PT
< pos
&& cursor_vpos
< 0)
3035 cursor_hpos
= p1
- leftmargin
;
3044 while (pos
== next_boundary
)
3046 Lisp_Object position
, limit
, prop
, ww
;
3048 /* Display the overlay strings here, unless we're at ZV
3049 and have already displayed the appropriate strings
3050 on an earlier line. */
3051 if (pos
< ZV
|| !zv_strings_seen
++)
3054 unsigned char *ovstr
;
3055 ovlen
= overlay_strings (pos
, w
, &ovstr
);
3059 /* Skip the ones we did in a previous line. */
3060 ovstr
+= ovstr_done
;
3061 ovlen
-= ovstr_done
;
3070 c
= STRING_CHAR_AND_LENGTH (ovstr
, ovlen
, len
);
3071 ovstr
+= len
, ovlen
-= len
, ovstr_done
+= len
;
3072 charset
= CHAR_CHARSET (c
);
3073 cols
= (charset
== CHARSET_COMPOSITION
3074 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3075 : CHARSET_WIDTH (charset
));
3079 c
= *ovstr
++, ovlen
--, ovstr_done
++;
3082 g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3085 if (p1
>= leftmargin
&& p1
< endp
)
3086 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3090 /* If we did all the overlay strings
3091 and we have room for text, clear ovstr_done
3092 just for neatness' sake. */
3093 if (ovlen
== 0 && p1
< endp
)
3098 /* Did we reach point? Record the cursor location. */
3099 if (pos
== PT
&& cursor_vpos
< 0)
3102 cursor_hpos
= p1
- leftmargin
;
3108 XSETFASTINT (position
, pos
);
3109 limit
= Fnext_overlay_change (position
);
3110 #ifdef USE_TEXT_PROPERTIES
3111 /* This is just an estimate to give reasonable
3112 performance; nothing should go wrong if it is too small. */
3113 if (XFASTINT (limit
) > pos
+ 50)
3115 int limitpos
= pos
+ 50;
3117 INC_POS (limitpos
); /* Adjust to character boundary. */
3118 XSETFASTINT (limit
, limitpos
);
3120 limit
= Fnext_single_property_change (position
, Qinvisible
,
3121 Fcurrent_buffer (), limit
);
3123 next_boundary
= XFASTINT (limit
);
3124 /* if the `invisible' property is set, we can skip to
3125 the next property change. */
3127 prop
= Fget_char_property (position
, Qinvisible
, ww
);
3128 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
3130 if (pos
< PT
&& next_boundary
>= PT
)
3133 cursor_hpos
= p1
- leftmargin
;
3135 pos
= next_boundary
;
3136 last_invis_skip
= pos
;
3137 last_invis_prop
= prop
;
3141 /* Did we reach point? Record the cursor location. */
3142 if (pos
== PT
&& cursor_vpos
< 0)
3145 cursor_hpos
= p1
- leftmargin
;
3148 /* Did we hit the end of the visible region of the buffer?
3152 /* Update charstarts for the end of this line. */
3153 /* Do nothing if off the left edge or at the right edge. */
3154 if (p1
>= leftmargin
&& p1
+ 1 != endp
)
3156 int *p2x
= &charstart
[(p1
< leftmargin
3164 /* Figure out where (if at all) the
3165 redisplay_end_trigger-hook should run. */
3166 if (MARKERP (w
->redisplay_end_trigger
)
3167 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
3168 e_t_h
= marker_position (w
->redisplay_end_trigger
);
3169 else if (INTEGERP (w
->redisplay_end_trigger
))
3170 e_t_h
= XINT (w
->redisplay_end_trigger
);
3174 /* If we've gone past the place to run a hook,
3176 if (pos
>= e_t_h
&& e_t_h
!= ZV
)
3178 Lisp_Object args
[3];
3180 args
[0] = Qredisplay_end_trigger_functions
;
3181 XSETWINDOW (args
[1], w
);
3182 XSETINT (args
[2], e_t_h
);
3184 /* Since we are *trying* to run these functions,
3185 don't try to run them again, even if they get an error. */
3186 w
->redisplay_end_trigger
= Qnil
;
3187 Frun_hook_with_args (3, args
);
3190 /* Notice if it changed the face of this character. */
3191 next_face_change
= pos
;
3195 /* Did we hit a face change? Figure out what face we should
3196 use now. We also hit this the first time through the
3197 loop, to see what face we should start with. */
3198 if (pos
>= next_face_change
3199 && (FRAME_WINDOW_P (f
) || FRAME_MSDOS_P (f
)))
3201 int limit
= pos
+ 50;
3203 if (limit
< Z
&& !CHAR_HEAD_P (POS_ADDR (limit
)))
3204 INC_POS (limit
); /* Adjust to character boundary. */
3205 current_face
= compute_char_face (f
, w
, pos
,
3206 region_beg
, region_end
,
3207 &next_face_change
, limit
, 0);
3211 /* Compute the next place we need to stop
3212 and do something special; set PAUSE. */
3216 if (pos
< next_boundary
&& next_boundary
< pause
)
3217 pause
= next_boundary
;
3218 if (pos
< next_face_change
&& next_face_change
< pause
)
3219 pause
= next_face_change
;
3224 /* Wouldn't you hate to read the next line to someone over
3226 if (pos
< PT
&& PT
< pause
)
3228 if (pos
< GPT
&& GPT
< pause
)
3240 /* PAUSE is surely at character boundary. */
3241 c
= STRING_CHAR_AND_LENGTH (p
, pause
- pos
, len
), p
+= len
;
3244 /* Let a display table override all standard display methods. */
3245 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
3247 p1
= copy_part_of_rope (f
, p1
, leftmargin
,
3248 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
3249 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
3250 current_face
, rev_dir_bit
);
3252 else if (c
>= 040 && c
< 0177)
3254 if (p1
>= leftmargin
)
3255 *p1
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3261 /* Same as p1prev, but after the invis_vector_contents text
3262 (if we have that on this line). */
3263 GLYPH
*p1prev_modified
;
3267 if (last_invis_skip
== pos
3268 && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop
))
3272 && indented_beyond_p (pos
+ 1, selective
))
3275 pos
= find_next_newline (pos
+ 1, 1);
3276 if (FETCH_BYTE (pos
- 1) == '\n')
3279 if (invis
&& selective_rlen
> 0 && p1
>= leftmargin
)
3284 cs
= charstart
+ (p1
- p1start
);
3287 p1
+= selective_rlen
;
3288 if (p1
- leftmargin
> width
)
3291 #if 0 /* This needs more work; charstarts needs to record
3292 both whether a position ho;ds an ellipsis character
3293 and what buffer position it corresponds to. */
3294 csend
= charstart
+ (p1
- p1start
);
3297 /* The idea is to use p1prev_modified instead of p1prev
3298 in the loop below over p2x. */
3299 p1prev_modified
= p1
;
3302 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3303 (p1
- p1prev
), current_face
, rev_dir_bit
);
3306 /* Update charstarts for the newline that ended this line. */
3307 /* Do nothing here for a char that's entirely off the left edge
3308 or if it starts at the right edge. */
3309 if (p1
>= leftmargin
&& p1prev
!= endp
)
3311 /* Store the newline's position into charstarts
3312 for the column where the newline starts.
3313 Store -1 for the rest of the glyphs it occupies. */
3314 int *p2x
= &charstart
[(p1prev
< leftmargin
3315 ? leftmargin
: p1prev
)
3317 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3324 /* Draw the face of the newline character as extending all the
3325 way to the end of the frame line. */
3328 if (p1
< leftmargin
)
3331 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3341 if (p1
>= leftmargin
&& p1
< endp
)
3342 *p1
= MAKE_GLYPH (f
, ' ', current_face
) | rev_dir_bit
;
3345 while ((p1
- leftmargin
+ taboffset
+ hscroll
- (hscroll
> 0))
3348 else if (c
== Ctl ('M') && selective
== -1)
3350 pos
= find_next_newline (pos
, 1);
3351 if (FETCH_BYTE (pos
- 1) == '\n')
3353 if (selective_rlen
> 0)
3355 p1
+= selective_rlen
;
3356 if (p1
- leftmargin
> width
)
3358 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3359 (p1
- p1prev
), current_face
, rev_dir_bit
);
3362 /* Draw the face of the newline character as extending all the
3363 way to the end of the frame line. */
3366 if (p1
< leftmargin
)
3369 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3373 /* Update charstarts for the ^M that ended this line. */
3374 /* Do nothing here for a char that's entirely off the left edge
3375 or if it starts at the right edge. */
3376 if (p1
>= leftmargin
&& p1prev
!= endp
)
3378 /* Store the newline's position into charstarts
3379 for the column where the newline starts.
3380 Store -1 for the rest of the glyphs it occupies. */
3381 int *p2x
= &charstart
[(p1prev
< leftmargin
3382 ? leftmargin
: p1prev
)
3384 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3392 else if (c
< 0200 && ctl_arrow
)
3394 if (p1
>= leftmargin
)
3396 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
3397 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
3398 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
3402 if (p1
>= leftmargin
&& p1
< endp
)
3403 *p1
= MAKE_GLYPH (f
, c
^ 0100, current_face
) | rev_dir_bit
;
3408 /* C is not a multibyte character. */
3409 if (p1
>= leftmargin
)
3411 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
3412 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
3413 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
3417 if (p1
>= leftmargin
&& p1
< endp
)
3418 *p1
= MAKE_GLYPH (f
, (c
>> 6) + '0', current_face
) | rev_dir_bit
;
3420 if (p1
>= leftmargin
&& p1
< endp
)
3421 *p1
= (MAKE_GLYPH (f
, (7 & (c
>> 3)) + '0', current_face
)
3424 if (p1
>= leftmargin
&& p1
< endp
)
3425 *p1
= MAKE_GLYPH (f
, (7 & c
) + '0', current_face
) | rev_dir_bit
;
3430 /* C is a multibyte character. */
3431 int charset
= CHAR_CHARSET (c
);
3432 int columns
= (charset
== CHARSET_COMPOSITION
3433 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3434 : CHARSET_WIDTH (charset
));
3435 GLYPH g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3439 if (p1
>= leftmargin
&& p1
< endp
)
3440 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3448 /* Update charstarts for the character just output. */
3450 /* Do nothing here for a char that's entirely off the left edge. */
3451 if (p1
>= leftmargin
)
3453 /* Store the char's position into charstarts
3454 for the first glyph occupied by this char.
3455 Store -1 for the rest of the glyphs it occupies. */
3458 int *p2x
= &charstart
[(p1prev
< leftmargin
3459 ? leftmargin
: p1prev
)
3461 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3471 val
.hpos
= - XINT (w
->hscroll
);
3479 /* Store 0 in this charstart line for the positions where
3480 there is no character. But do leave what was recorded
3481 for the character that ended the line. */
3482 /* Add 1 in the endtest to compensate for the fact that ENDP was
3483 made from WIDTH, which is 1 less than the window's actual
3485 i
= p1
- p1start
+ 1;
3486 if (p1
< leftmargin
)
3487 i
+= leftmargin
- p1
;
3488 for (; i
< endp
- p1start
+ 1; i
++)
3491 /* Handle continuation in middle of a character */
3492 /* by backing up over it */
3495 /* Don't back up if we never actually displayed any text.
3496 This occurs when the minibuffer prompt takes up the whole line. */
3499 /* Start the next line with that same character whose
3500 character code is C and the length of multi-byte form is
3505 /* C is not a multi-byte character. We can break it and
3506 start from the middle column in the next line. So,
3507 adjust VAL.HPOS to skip the columns output on this
3509 val
.hpos
+= p1prev
- endp
;
3512 /* C is a multibyte character. Since we can't broke it
3513 in the middle, the whole character should be driven
3514 into the next line. */
3515 /* As the result, the actual columns occupied by the
3516 text on this line is less than WIDTH. VAL.TAB_OFFSET
3517 must be adjusted. */
3518 taboffset
= taboffset
+ (p1prev
- endp
);
3519 /* Let's fill unused columns with TRUNCATOR or CONTINUER. */
3521 GLYPH g
= fix_glyph (f
, truncate
? truncator
: continuer
, 0);
3522 while (p1prev
< endp
)
3525 /* If POINT is at POS, cursor should not on this line. */
3532 /* Keep in this line everything up to the continuation column. */
3536 /* Finish deciding which character to start the next line on,
3537 and what hpos to start it at.
3538 Also set `lastpos' to the last position which counts as "on this line"
3539 for cursor-positioning. */
3543 if (FETCH_BYTE (pos
) == '\n')
3545 /* If stopped due to a newline, start next line after it */
3548 /* Check again for hidden lines, in case the newline occurred exactly
3549 at the right margin. */
3550 while (pos
< ZV
&& selective
> 0
3551 && indented_beyond_p (pos
, selective
))
3552 pos
= find_next_newline (pos
, 1);
3555 /* Stopped due to right margin of window */
3559 *p1
++ = fix_glyph (f
, truncator
, 0);
3560 /* Truncating => start next line after next newline,
3561 and point is on this line if it is before the newline,
3562 and skip none of first char of next line */
3564 pos
= find_next_newline (pos
, 1);
3565 while (pos
< ZV
&& selective
> 0
3566 && indented_beyond_p (pos
, selective
));
3567 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
3569 lastpos
= pos
- (FETCH_BYTE (pos
- 1) == '\n');
3574 *p1
++ = fix_glyph (f
, continuer
, 0);
3577 val
.tab_offset
= taboffset
+ width
;
3584 /* If point is at eol or in invisible text at eol,
3585 record its frame location now. */
3587 if (start
<= PT
&& PT
<= lastpos
&& cursor_vpos
< 0)
3590 cursor_hpos
= p1
- leftmargin
;
3593 if (cursor_vpos
== vpos
)
3595 if (cursor_hpos
< 0) cursor_hpos
= 0;
3596 if (cursor_hpos
> width
) cursor_hpos
= width
;
3597 cursor_hpos
+= WINDOW_LEFT_MARGIN (w
);
3598 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
3600 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (f
)
3601 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
)))
3603 FRAME_CURSOR_Y (f
) = cursor_vpos
;
3604 FRAME_CURSOR_X (f
) = cursor_hpos
;
3607 if (w
== XWINDOW (selected_window
))
3609 /* Line is not continued and did not start
3610 in middle of character */
3611 if ((hpos
- WINDOW_LEFT_MARGIN (w
)
3612 == (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
3615 this_line_bufpos
= start
;
3616 this_line_buffer
= current_buffer
;
3617 this_line_vpos
= cursor_vpos
;
3618 this_line_start_hpos
= hpos
- WINDOW_LEFT_MARGIN (w
);
3619 this_line_endpos
= Z
- lastpos
;
3622 this_line_bufpos
= 0;
3627 /* If hscroll and line not empty, insert truncation-at-left marker */
3628 if (hscroll
&& lastpos
!= start
)
3630 GLYPH g
= fix_glyph (f
, truncator
, 0);
3632 if (p1
<= leftmargin
)
3633 p1
= leftmargin
+ 1;
3634 else /* MULE: it may be a wide-column character */
3636 p1prev
= leftmargin
+ 1;
3637 while (p1prev
< p1
&& *p1prev
& GLYPH_MASK_PADDING
)
3642 if (!WINDOW_RIGHTMOST_P (w
))
3645 if (p1
< leftmargin
) p1
= leftmargin
;
3646 while (p1
< endp
) *p1
++ = SPACEGLYPH
;
3648 /* Don't draw vertical bars if we're using scroll bars. They're
3649 covered up by the scroll bars, and it's distracting to see
3650 them when the scroll bar windows are flickering around to be
3652 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
3655 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
3658 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3659 *p1
++ = (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
3660 ? XINT (DISP_BORDER_GLYPH (dp
))
3663 desired_glyphs
->used
[vpos
] = max (desired_glyphs
->used
[vpos
],
3664 p1
- desired_glyphs
->glyphs
[vpos
]);
3665 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
3667 /* If the start of this line is the overlay arrow-position,
3668 then put the arrow string into the display-line. */
3670 if (MARKERP (Voverlay_arrow_position
)
3671 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
3672 && start
== marker_position (Voverlay_arrow_position
)
3673 && STRINGP (Voverlay_arrow_string
)
3674 && ! overlay_arrow_seen
)
3676 unsigned char *p
= XSTRING (Voverlay_arrow_string
)->data
;
3678 int len
= XSTRING (Voverlay_arrow_string
)->size
;
3684 if (!NULL_INTERVAL_P (XSTRING (Voverlay_arrow_string
)->intervals
))
3686 /* If the arrow string has text props, obey them when displaying. */
3687 for (i
= 0; i
< len
; i
++)
3690 Lisp_Object face
, ilisp
;
3693 XSETFASTINT (ilisp
, i
);
3694 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
3695 newface
= compute_glyph_face_1 (f
, face
, 0);
3696 leftmargin
[i
] = FAST_MAKE_GLYPH (c
, newface
);
3700 #endif /* HAVE_FACES */
3702 for (i
= 0; i
< len
; i
++)
3703 leftmargin
[i
] = p
[i
];
3706 /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */
3707 arrow_end
= (leftmargin
- desired_glyphs
->glyphs
[vpos
]) + len
;
3708 if (desired_glyphs
->used
[vpos
] < arrow_end
)
3709 desired_glyphs
->used
[vpos
] = arrow_end
;
3711 overlay_arrow_seen
= 1;
3715 val
.ovstring_chars_done
= ovstr_done
;
3716 val_display_text_line
= val
;
3717 return &val_display_text_line
;
3720 /* Redisplay the menu bar in the frame for window W. */
3723 display_menu_bar (w
)
3726 Lisp_Object items
, tail
;
3727 register int vpos
= 0;
3728 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
3729 int maxendcol
= FRAME_WIDTH (f
);
3734 if (!NILP (Vwindow_system
))
3738 #ifdef USE_X_TOOLKIT
3741 #endif /* USE_X_TOOLKIT */
3743 get_display_line (f
, vpos
, 0);
3745 items
= FRAME_MENU_BAR_ITEMS (f
);
3746 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
3748 Lisp_Object pos
, string
;
3749 string
= XVECTOR (items
)->contents
[i
+ 1];
3753 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], hpos
);
3755 if (hpos
< maxendcol
)
3756 hpos
= display_string (w
, vpos
,
3757 XSTRING (string
)->data
,
3758 XSTRING (string
)->size
,
3759 hpos
, 0, 0, hpos
, maxendcol
);
3760 /* Put a space between items. */
3761 if (hpos
< maxendcol
)
3763 int hpos1
= hpos
+ 1;
3764 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0,
3765 min (hpos1
, maxendcol
), maxendcol
);
3769 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
3770 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
3772 /* Fill out the line with spaces. */
3773 if (maxendcol
> hpos
)
3774 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0, maxendcol
, maxendcol
);
3776 /* Clear the rest of the lines allocated to the menu bar. */
3778 while (vpos
< FRAME_MENU_BAR_LINES (f
))
3779 get_display_line (f
, vpos
++, 0);
3782 /* Display the mode line for window w */
3785 display_mode_line (w
)
3788 register int vpos
= XFASTINT (w
->height
) + XFASTINT (w
->top
) - 1;
3789 register int left
= WINDOW_LEFT_MARGIN (w
);
3790 register int right
= WINDOW_RIGHT_MARGIN (w
);
3791 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
3793 line_number_displayed
= 0;
3794 w
->column_number_displayed
= Qnil
;
3796 get_display_line (f
, vpos
, left
);
3798 /* Temporarily make frame F's kboard the current kboard
3799 so that kboard-local variables in the mode_line_format
3800 will get the right values. */
3801 push_frame_kboard (f
);
3803 display_mode_element (w
, vpos
, left
, 0, right
, right
,
3804 current_buffer
->mode_line_format
);
3806 pop_frame_kboard ();
3808 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
3810 /* Put the mode line in inverse video.
3811 Use faces if possible, since that lets us handle
3812 partial-width windows and avoid inverting the scroll bar columns. */
3814 if (! FRAME_TERMCAP_P (f
) && mode_line_inverse_video
)
3816 /* For a partial width window, explicitly set face of each glyph. */
3818 unsigned int padding
;
3819 GLYPH
*ptr
= FRAME_DESIRED_GLYPHS (f
)->glyphs
[vpos
];
3820 for (i
= left
; i
< right
; ++i
)
3822 padding
= ptr
[i
] & GLYPH_MASK_PADDING
;
3823 ptr
[i
] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr
[i
]), 1) | padding
;
3829 /* Make the mode line inverse video if the entire line
3830 is made of mode lines.
3831 I.e. if this window is full width,
3832 or if it is the child of a full width window
3833 (which implies that that window is split side-by-side
3834 and the rest of this line is mode lines of the sibling windows). */
3835 if (WINDOW_FULL_WIDTH_P (w
)
3836 || WINDOW_FULL_WIDTH_P (XWINDOW (w
->parent
)))
3837 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
3840 /* Contribute ELT to the mode line for window W.
3841 How it translates into text depends on its data type.
3843 VPOS is the position of the mode line being displayed.
3845 HPOS is the position (absolute on frame) where this element's text
3846 should start. The output is truncated automatically at the right
3849 DEPTH is the depth in recursion. It is used to prevent
3850 infinite recursion here.
3852 MINENDCOL is the hpos before which the element may not end.
3853 The element is padded at the right with spaces if nec
3854 to reach this column.
3856 MAXENDCOL is the hpos past which this element may not extend.
3857 If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority.
3858 (This is necessary to make nested padding and truncation work.)
3860 Returns the hpos of the end of the text generated by ELT.
3861 The next element will receive that value as its HPOS arg,
3862 so as to concatenate the elements. */
3865 display_mode_element (w
, vpos
, hpos
, depth
, minendcol
, maxendcol
, elt
)
3867 register int vpos
, hpos
;
3870 register int maxendcol
;
3871 register Lisp_Object elt
;
3879 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
3883 /* A string: output it and check for %-constructs within it. */
3884 register unsigned char c
;
3885 register unsigned char *this = XSTRING (elt
)->data
;
3887 while (hpos
< maxendcol
&& *this)
3889 unsigned char *last
= this;
3890 while ((c
= *this++) != '\0' && c
!= '%')
3892 if (this - 1 != last
)
3894 register int lim
= --this - last
+ hpos
;
3895 if (frame_title_ptr
)
3896 hpos
= store_frame_title (last
, hpos
, min (lim
, maxendcol
));
3898 hpos
= display_string (w
, vpos
, last
, -1, hpos
, 0, 1,
3899 hpos
, min (lim
, maxendcol
));
3903 register int minendcol
;
3904 register int spec_width
= 0;
3906 /* We can't allow -ve args due to the "%-" construct */
3907 /* Argument specifies minwidth but not maxwidth
3908 (maxwidth can be specified by
3909 (<negative-number> . <stuff>) mode-line elements) */
3911 while ((c
= *this++) >= '0' && c
<= '9')
3913 spec_width
= spec_width
* 10 + (c
- '0');
3916 minendcol
= hpos
+ spec_width
;
3917 if (minendcol
> maxendcol
)
3919 spec_width
= maxendcol
- hpos
;
3920 minendcol
= maxendcol
;
3924 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
3925 spec_width
, maxendcol
,
3926 Vglobal_mode_string
);
3929 char *spec
= decode_mode_spec (w
, c
, spec_width
,
3931 if (frame_title_ptr
)
3932 hpos
= store_frame_title (spec
, minendcol
, maxendcol
);
3934 hpos
= display_string (w
, vpos
, spec
, -1,
3936 minendcol
, maxendcol
);
3944 /* A symbol: process the value of the symbol recursively
3945 as if it appeared here directly. Avoid error if symbol void.
3946 Special case: if value of symbol is a string, output the string
3949 register Lisp_Object tem
;
3950 tem
= Fboundp (elt
);
3953 tem
= Fsymbol_value (elt
);
3954 /* If value is a string, output that string literally:
3955 don't check for % within it. */
3958 if (frame_title_ptr
)
3959 hpos
= store_frame_title (XSTRING (tem
)->data
,
3960 minendcol
, maxendcol
);
3962 hpos
= display_string (w
, vpos
, XSTRING (tem
)->data
,
3963 XSTRING (tem
)->size
,
3964 hpos
, 0, 1, minendcol
, maxendcol
);
3966 /* Give up right away for nil or t. */
3967 else if (!EQ (tem
, elt
))
3968 { elt
= tem
; goto tail_recurse
; }
3975 register Lisp_Object car
, tem
;
3977 /* A cons cell: three distinct cases.
3978 If first element is a string or a cons, process all the elements
3979 and effectively concatenate them.
3980 If first element is a negative number, truncate displaying cdr to
3981 at most that many characters. If positive, pad (with spaces)
3982 to at least that many characters.
3983 If first element is a symbol, process the cadr or caddr recursively
3984 according to whether the symbol's value is non-nil or nil. */
3985 car
= XCONS (elt
)->car
;
3988 tem
= Fboundp (car
);
3989 elt
= XCONS (elt
)->cdr
;
3992 /* elt is now the cdr, and we know it is a cons cell.
3993 Use its car if CAR has a non-nil value. */
3996 tem
= Fsymbol_value (car
);
3998 { elt
= XCONS (elt
)->car
; goto tail_recurse
; }
4000 /* Symbol's value is nil (or symbol is unbound)
4001 Get the cddr of the original list
4002 and if possible find the caddr and use that. */
4003 elt
= XCONS (elt
)->cdr
;
4006 else if (!CONSP (elt
))
4008 elt
= XCONS (elt
)->car
;
4011 else if (INTEGERP (car
))
4013 register int lim
= XINT (car
);
4014 elt
= XCONS (elt
)->cdr
;
4016 /* Negative int means reduce maximum width.
4017 DO NOT change MINENDCOL here!
4018 (20 -10 . foo) should truncate foo to 10 col
4019 and then pad to 20. */
4020 maxendcol
= min (maxendcol
, hpos
- lim
);
4023 /* Padding specified. Don't let it be more than
4026 if (lim
> maxendcol
)
4028 /* If that's more padding than already wanted, queue it.
4029 But don't reduce padding already specified even if
4030 that is beyond the current truncation point. */
4031 if (lim
> minendcol
)
4036 else if (STRINGP (car
) || CONSP (car
))
4038 register int limit
= 50;
4039 /* LIMIT is to protect against circular lists. */
4040 while (CONSP (elt
) && --limit
> 0
4041 && hpos
< maxendcol
)
4043 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4046 elt
= XCONS (elt
)->cdr
;
4054 if (frame_title_ptr
)
4055 hpos
= store_frame_title ("*invalid*", minendcol
, maxendcol
);
4057 hpos
= display_string (w
, vpos
, "*invalid*", -1, hpos
, 0, 1,
4058 minendcol
, maxendcol
);
4062 if (minendcol
> hpos
)
4063 if (frame_title_ptr
)
4064 hpos
= store_frame_title ("", minendcol
, maxendcol
);
4066 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 1, minendcol
, maxendcol
);
4070 /* Write a null-terminated, right justified decimal representation of
4071 the positive integer D to BUF using a minimal field width WIDTH. */
4074 pint2str (buf
, width
, d
)
4079 register char *p
= buf
;
4086 *p
++ = d
% 10 + '0';
4089 for (width
-= (int) (p
- buf
); width
> 0; --width
) *p
++ = ' ';
4099 /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF.
4100 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
4101 type of CODING_SYSTEM. Return updated pointer into BUF. */
4104 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
4105 Lisp_Object coding_system
;
4110 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
4112 val
= coding_system
;
4114 if (NILP (val
)) /* Not yet decided. */
4119 *buf
++ = eol_mnemonic_undecided
;
4120 /* Don't mention EOL conversion if it isn't decided. */
4124 Lisp_Object eolvalue
;
4126 eolvalue
= Fget (coding_system
, Qeol_type
);
4128 while (!NILP (val
) && SYMBOLP (val
))
4130 val
= Fget (val
, Qcoding_system
);
4131 if (NILP (eolvalue
))
4132 eolvalue
= Fget (val
, Qeol_type
);
4136 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
4140 /* The EOL conversion we are using. */
4142 /* The EOL conversion that is normal on this system. */
4144 if (NILP (eolvalue
)) /* Not yet decided. */
4145 eoltype
= eol_mnemonic_undecided
;
4146 else if (VECTORP (eolvalue
)) /* Not yet decided. */
4147 eoltype
= eol_mnemonic_undecided
;
4148 else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */
4149 eoltype
= (XFASTINT (eolvalue
) == 0
4151 : (XFASTINT (eolvalue
) == 1
4152 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
4154 /* Mention the EOL conversion if it is not the usual one. */
4161 /* Return a string for the output of a mode line %-spec for window W,
4162 generated by character C. SPEC_WIDTH is the field width when
4163 padding to the left (%c, %l). The value returned from this
4164 function will later be truncated to width MAXWIDTH. */
4166 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
4169 decode_mode_spec (w
, c
, spec_width
, maxwidth
)
4172 register int spec_width
;
4173 register int maxwidth
;
4176 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4177 char *decode_mode_spec_buf
= (char *) FRAME_TEMP_GLYPHS (f
)->total_contents
;
4178 struct buffer
*b
= XBUFFER (w
->buffer
);
4181 if (maxwidth
> FRAME_WIDTH (f
))
4182 maxwidth
= FRAME_WIDTH (f
);
4187 if (!NILP (b
->read_only
))
4189 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4194 /* This differs from %* only for a modified read-only buffer. */
4195 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4197 if (!NILP (b
->read_only
))
4202 /* This differs from %* in ignoring read-only-ness. */
4203 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4215 if (command_loop_level
> 5)
4217 p
= decode_mode_spec_buf
;
4218 for (i
= 0; i
< command_loop_level
; i
++)
4221 return decode_mode_spec_buf
;
4229 if (command_loop_level
> 5)
4231 p
= decode_mode_spec_buf
;
4232 for (i
= 0; i
< command_loop_level
; i
++)
4235 return decode_mode_spec_buf
;
4243 if (maxwidth
< sizeof (lots_of_dashes
))
4244 return lots_of_dashes
;
4247 for (p
= decode_mode_spec_buf
, i
= maxwidth
; i
> 0; i
--)
4251 return decode_mode_spec_buf
;
4257 if (maxwidth
>= 3 && XSTRING (obj
)->size
> maxwidth
)
4259 bcopy (XSTRING (obj
)->data
, decode_mode_spec_buf
, maxwidth
- 1);
4260 decode_mode_spec_buf
[maxwidth
- 1] = '\\';
4261 decode_mode_spec_buf
[maxwidth
] = '\0';
4262 return decode_mode_spec_buf
;
4269 int col
= current_column ();
4270 XSETFASTINT (w
->column_number_displayed
, col
);
4271 pint2str (decode_mode_spec_buf
, spec_width
, col
);
4272 return decode_mode_spec_buf
;
4276 /* %F displays the frame name. */
4277 if (!NILP (f
->title
))
4278 return (char *) XSTRING (f
->title
)->data
;
4279 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
4280 return (char *) XSTRING (f
->name
)->data
;
4288 else if (STRINGP (obj
) && XSTRING (obj
)->size
> maxwidth
)
4290 bcopy ("...", decode_mode_spec_buf
, 3);
4291 bcopy (XSTRING (obj
)->data
+ XSTRING (obj
)->size
- maxwidth
+ 3,
4292 decode_mode_spec_buf
+ 3, maxwidth
- 3);
4293 return decode_mode_spec_buf
;
4300 int startpos
= marker_position (w
->start
);
4301 int line
, linepos
, topline
;
4304 int height
= XFASTINT (w
->height
);
4306 /* If we decided that this buffer isn't suitable for line numbers,
4307 don't forget that too fast. */
4308 if (EQ (w
->base_line_pos
, w
->buffer
))
4310 /* But do forget it, if the window shows a different buffer now. */
4311 else if (BUFFERP (w
->base_line_pos
))
4312 w
->base_line_pos
= Qnil
;
4314 /* If the buffer is very big, don't waste time. */
4315 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
4317 w
->base_line_pos
= Qnil
;
4318 w
->base_line_number
= Qnil
;
4322 if (!NILP (w
->base_line_number
)
4323 && !NILP (w
->base_line_pos
)
4324 && XFASTINT (w
->base_line_pos
) <= marker_position (w
->start
))
4326 line
= XFASTINT (w
->base_line_number
);
4327 linepos
= XFASTINT (w
->base_line_pos
);
4332 linepos
= BUF_BEGV (b
);
4335 /* Count lines from base line to window start position. */
4336 nlines
= display_count_lines (linepos
, startpos
, startpos
, &junk
);
4338 topline
= nlines
+ line
;
4340 /* Determine a new base line, if the old one is too close
4341 or too far away, or if we did not have one.
4342 "Too close" means it's plausible a scroll-down would
4344 if (startpos
== BUF_BEGV (b
))
4346 XSETFASTINT (w
->base_line_number
, topline
);
4347 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
4349 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
4350 || linepos
== BUF_BEGV (b
))
4352 int limit
= BUF_BEGV (b
);
4354 int distance
= (height
* 2 + 30) * 200;
4356 if (startpos
- distance
> limit
)
4357 limit
= startpos
- distance
;
4359 nlines
= display_count_lines (startpos
, limit
,
4362 /* If we couldn't find the lines we wanted within
4364 give up on line numbers for this window. */
4365 if (position
== startpos
- distance
)
4367 w
->base_line_pos
= w
->buffer
;
4368 w
->base_line_number
= Qnil
;
4372 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
4373 XSETFASTINT (w
->base_line_pos
, position
);
4376 /* Now count lines from the start pos to point. */
4377 nlines
= display_count_lines (startpos
, PT
, PT
, &junk
);
4379 /* Record that we did display the line number. */
4380 line_number_displayed
= 1;
4382 /* Make the string to show. */
4383 pint2str (decode_mode_spec_buf
, spec_width
, topline
+ nlines
);
4384 return decode_mode_spec_buf
;
4387 char* p
= decode_mode_spec_buf
;
4388 for (spec_width
-= 2; spec_width
> 0; --spec_width
) *p
++ = ' ';
4390 return decode_mode_spec_buf
;
4400 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
4406 int pos
= marker_position (w
->start
);
4407 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4409 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
4411 if (pos
<= BUF_BEGV (b
))
4416 else if (pos
<= BUF_BEGV (b
))
4420 if (total
> 1000000)
4421 /* Do it differently for a large value, to avoid overflow. */
4422 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4424 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4425 /* We can't normally display a 3-digit number,
4426 so get us a 2-digit number that is close. */
4429 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4430 return decode_mode_spec_buf
;
4434 /* Display percentage of size above the bottom of the screen. */
4437 int toppos
= marker_position (w
->start
);
4438 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
4439 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4441 if (botpos
>= BUF_ZV (b
))
4443 if (toppos
<= BUF_BEGV (b
))
4450 if (total
> 1000000)
4451 /* Do it differently for a large value, to avoid overflow. */
4452 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4454 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4455 /* We can't normally display a 3-digit number,
4456 so get us a 2-digit number that is close. */
4459 if (toppos
<= BUF_BEGV (b
))
4460 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
4462 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4463 return decode_mode_spec_buf
;
4468 /* status of process */
4469 obj
= Fget_buffer_process (w
->buffer
);
4471 return "no process";
4473 obj
= Fsymbol_name (Fprocess_status (obj
));
4477 case 't': /* indicate TEXT or BINARY */
4478 #ifdef MODE_LINE_BINARY_TEXT
4479 return MODE_LINE_BINARY_TEXT (b
);
4485 /* coding-system (not including end-of-line format) */
4487 /* coding-system (including end-of-line type) */
4489 int eol_flag
= (c
== 'Z');
4490 char *p
= decode_mode_spec_buf
;
4492 if (FRAME_TERMCAP_P (f
))
4494 /* No need to mention EOL here--the terminal never needs
4495 to do EOL conversion. */
4496 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, 0);
4497 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, 0);
4499 p
= decode_mode_spec_coding (b
->buffer_file_coding_system
,
4502 #if 0 /* This proves to be annoying; I think we can do without. -- rms. */
4504 obj
= Fget_buffer_process (Fcurrent_buffer ());
4507 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
4509 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
4512 #endif /* subprocesses */
4515 return decode_mode_spec_buf
;
4520 return (char *) XSTRING (obj
)->data
;
4525 /* Search for COUNT instances of a line boundary, which means either a
4526 newline or (if selective display enabled) a carriage return.
4527 Start at START. If COUNT is negative, search backwards.
4529 If we find COUNT instances, set *SHORTAGE to zero, and return the
4530 position after the COUNTth match. Note that for reverse motion
4531 this is not the same as the usual convention for Emacs motion commands.
4533 If we don't find COUNT instances before reaching the end of the
4534 buffer (or the beginning, if scanning backwards), set *SHORTAGE to
4535 the number of line boundaries left unfound, and return the end of the
4536 buffer we bumped up against. */
4539 display_scan_buffer (start
, count
, shortage
)
4540 int *shortage
, start
;
4543 int limit
= ((count
> 0) ? ZV
- 1 : BEGV
);
4544 int direction
= ((count
> 0) ? 1 : -1);
4546 register unsigned char *cursor
;
4547 unsigned char *base
;
4549 register int ceiling
;
4550 register unsigned char *ceiling_addr
;
4552 /* If we are not in selective display mode,
4553 check only for newlines. */
4554 if (! (!NILP (current_buffer
->selective_display
)
4555 && !INTEGERP (current_buffer
->selective_display
)))
4556 return scan_buffer ('\n', start
, 0, count
, shortage
, 0);
4558 /* The code that follows is like scan_buffer
4559 but checks for either newline or carriage return. */
4565 while (start
!= limit
+ 1)
4567 ceiling
= BUFFER_CEILING_OF (start
);
4568 ceiling
= min (limit
, ceiling
);
4569 ceiling_addr
= POS_ADDR (ceiling
) + 1;
4570 base
= (cursor
= POS_ADDR (start
));
4573 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
4575 if (cursor
!= ceiling_addr
)
4580 return (start
+ cursor
- base
+ 1);
4583 if (++cursor
== ceiling_addr
)
4589 start
+= cursor
- base
;
4593 start
--; /* first character we scan */
4594 while (start
> limit
- 1)
4595 { /* we WILL scan under start */
4596 ceiling
= BUFFER_FLOOR_OF (start
);
4597 ceiling
= max (limit
, ceiling
);
4598 ceiling_addr
= POS_ADDR (ceiling
) - 1;
4599 base
= (cursor
= POS_ADDR (start
));
4603 while (--cursor
!= ceiling_addr
4604 && *cursor
!= '\n' && *cursor
!= 015)
4606 if (cursor
!= ceiling_addr
)
4611 return (start
+ cursor
- base
+ 1);
4617 start
+= cursor
- base
;
4622 *shortage
= count
* direction
;
4623 return (start
+ ((direction
== 1 ? 0 : 1)));
4626 /* Count up to N lines starting from FROM.
4627 But don't go beyond LIMIT.
4628 Return the number of lines thus found (always positive).
4629 Store the position after what was found into *POS_PTR. */
4632 display_count_lines (from
, limit
, n
, pos_ptr
)
4645 *pos_ptr
= display_scan_buffer (from
, n
, &shortage
);
4651 /* When scanning backwards, scan_buffer stops *after* the last newline
4652 it finds, but does count it. Compensate for that. */
4653 return - n
- shortage
- (*pos_ptr
!= limit
);
4654 return n
- shortage
;
4657 /* Display STRING on one line of window W, starting at HPOS.
4658 Display at position VPOS. Caller should have done get_display_line.
4659 If VPOS == -1, display it as the current frame's title.
4660 LENGTH is the length of STRING, or -1 meaning STRING is null-terminated.
4662 TRUNCATE is GLYPH to display at end if truncated. Zero for none.
4664 MINCOL is the first column ok to end at. (Pad with spaces to this col.)
4665 MAXCOL is the last column ok to end at. Truncate here.
4666 -1 for MINCOL or MAXCOL means no explicit minimum or maximum.
4667 Both count from the left edge of the frame, as does HPOS.
4668 The right edge of W is an implicit maximum.
4669 If TRUNCATE is nonzero, the implicit maximum is one column before the edge.
4671 OBEY_WINDOW_WIDTH says to put spaces or vertical bars
4672 at the place where the current window ends in this line
4673 and not display anything beyond there. Otherwise, only MAXCOL
4674 controls where to stop output.
4676 Returns ending hpos. */
4679 display_string (w
, vpos
, string
, length
, hpos
, truncate
,
4680 obey_window_width
, mincol
, maxcol
)
4682 unsigned char *string
;
4686 int obey_window_width
;
4692 int hscroll
= XINT (w
->hscroll
);
4693 int tab_width
= XINT (XBUFFER (w
->buffer
)->tab_width
);
4694 register GLYPH
*start
;
4695 register GLYPH
*end
;
4696 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4697 struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
4698 GLYPH
*p1start
= desired_glyphs
->glyphs
[vpos
] + hpos
;
4699 int window_width
= XFASTINT (w
->width
);
4700 /* If 1, we must display multibyte characters. */
4701 int multibyte
= !NILP (XBUFFER (w
->buffer
)->enable_multibyte_characters
);
4703 /* Use the standard display table, not the window's display table.
4704 We don't want the mode line in rot13. */
4705 register struct Lisp_Char_Table
*dp
= 0;
4708 if (DISP_TABLE_P (Vstandard_display_table
))
4709 dp
= XCHAR_TABLE (Vstandard_display_table
);
4711 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
4714 start
= desired_glyphs
->glyphs
[vpos
];
4716 if (obey_window_width
)
4718 start
+= XFASTINT (w
->left
);
4719 end
= start
+ window_width
- (truncate
!= 0);
4721 if (!WINDOW_RIGHTMOST_P (w
))
4723 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
4727 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
4730 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
4735 if (! obey_window_width
4736 || (maxcol
>= 0 && end
- desired_glyphs
->glyphs
[vpos
] > maxcol
))
4737 end
= desired_glyphs
->glyphs
[vpos
] + maxcol
;
4739 /* Store 0 in charstart for these columns. */
4740 for (i
= (hpos
>= 0 ? hpos
: 0); i
< end
- p1start
+ hpos
; i
++)
4741 desired_glyphs
->charstarts
[vpos
][i
] = 0;
4743 if (maxcol
>= 0 && mincol
> maxcol
)
4747 /* We need this value for multibyte characters. */
4748 length
= strlen (string
);
4750 /* We set truncated to 1 if we get stopped by trying to pass END
4751 (that is, trying to pass MAXCOL.) */
4760 c
= STRING_CHAR_AND_LENGTH (string
, length
, len
);
4762 c
= *string
, len
= 1;
4764 string
+= len
, length
-= len
;
4772 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
4774 p1
= copy_part_of_rope (f
, p1
, start
,
4775 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
4776 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
4779 else if (c
>= 040 && c
< 0177)
4789 if (p1
>= start
&& p1
< end
)
4793 while ((p1
- start
+ hscroll
- (hscroll
> 0)) % tab_width
);
4795 else if (c
< 0200 && ! NILP (buffer_defaults
.ctl_arrow
))
4799 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
4800 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
4801 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
4804 if (p1
>= start
&& p1
< end
)
4810 /* C is a control character or a binary byte data. */
4813 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
4814 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
4815 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
4818 if (p1
>= start
&& p1
< end
)
4819 *p1
= (c
>> 6) + '0';
4821 if (p1
>= start
&& p1
< end
)
4822 *p1
= (7 & (c
>> 3)) + '0';
4824 if (p1
>= start
&& p1
< end
)
4825 *p1
= (7 & c
) + '0';
4830 /* C is a multibyte character. */
4831 int charset
= CHAR_CHARSET (c
);
4832 int columns
= (charset
== CHARSET_COMPOSITION
4833 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
4834 : CHARSET_WIDTH (charset
));
4838 /* Since we can't show the left part of C, fill all
4839 columns with spaces. */
4840 columns
-= start
- p1
;
4849 else if (p1
+ columns
> end
)
4851 /* Since we can't show the right part of C, fill all
4852 columns with TRUNCATE if TRUNCATE is specified. */
4856 *p1
++ = fix_glyph (f
, truncate
, 0);
4857 /* And tell the line is truncated. */
4864 /* We can show the whole glyph of C. */
4867 *p1
++ = c
| GLYPH_MASK_PADDING
;
4875 if (truncate
) *p1
++ = fix_glyph (f
, truncate
, 0);
4877 else if (mincol
>= 0)
4879 end
= desired_glyphs
->glyphs
[vpos
] + mincol
;
4885 register int len
= p1
- desired_glyphs
->glyphs
[vpos
];
4887 if (len
> desired_glyphs
->used
[vpos
])
4888 desired_glyphs
->used
[vpos
] = len
;
4889 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
4895 /* This is like a combination of memq and assq.
4896 Return 1 if PROPVAL appears as an element of LIST
4897 or as the car of an element of LIST.
4898 If PROPVAL is a list, compare each element against LIST
4899 in that way, and return 1 if any element of PROPVAL is found in LIST.
4901 This function cannot quit. */
4904 invisible_p (propval
, list
)
4905 register Lisp_Object propval
;
4908 register Lisp_Object tail
, proptail
;
4909 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4911 register Lisp_Object tem
;
4912 tem
= XCONS (tail
)->car
;
4913 if (EQ (propval
, tem
))
4915 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
4918 if (CONSP (propval
))
4919 for (proptail
= propval
; CONSP (proptail
);
4920 proptail
= XCONS (proptail
)->cdr
)
4922 Lisp_Object propelt
;
4923 propelt
= XCONS (proptail
)->car
;
4924 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4926 register Lisp_Object tem
;
4927 tem
= XCONS (tail
)->car
;
4928 if (EQ (propelt
, tem
))
4930 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
4937 /* Return 1 if PROPVAL appears as the car of an element of LIST
4938 and the cdr of that element is non-nil.
4939 If PROPVAL is a list, check each element of PROPVAL in that way,
4940 and the first time some element is found,
4941 return 1 if the cdr of that element is non-nil.
4943 This function cannot quit. */
4946 invisible_ellipsis_p (propval
, list
)
4947 register Lisp_Object propval
;
4950 register Lisp_Object tail
, proptail
;
4951 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4953 register Lisp_Object tem
;
4954 tem
= XCONS (tail
)->car
;
4955 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
4956 return ! NILP (XCONS (tem
)->cdr
);
4958 if (CONSP (propval
))
4959 for (proptail
= propval
; CONSP (proptail
);
4960 proptail
= XCONS (proptail
)->cdr
)
4962 Lisp_Object propelt
;
4963 propelt
= XCONS (proptail
)->car
;
4964 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4966 register Lisp_Object tem
;
4967 tem
= XCONS (tail
)->car
;
4968 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
4969 return ! NILP (XCONS (tem
)->cdr
);
4978 staticpro (&Qmenu_bar_update_hook
);
4979 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
4981 staticpro (&Qoverriding_terminal_local_map
);
4982 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
4984 staticpro (&Qoverriding_local_map
);
4985 Qoverriding_local_map
= intern ("overriding-local-map");
4987 staticpro (&Qwindow_scroll_functions
);
4988 Qwindow_scroll_functions
= intern ("window-scroll-functions");
4990 staticpro (&Qredisplay_end_trigger_functions
);
4991 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
4993 staticpro (&last_arrow_position
);
4994 staticpro (&last_arrow_string
);
4995 last_arrow_position
= Qnil
;
4996 last_arrow_string
= Qnil
;
4998 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
4999 "String (or mode line construct) included (normally) in `mode-line-format'.");
5000 Vglobal_mode_string
= Qnil
;
5002 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
5003 "Marker for where to display an arrow on top of the buffer text.\n\
5004 This must be the beginning of a line in order to work.\n\
5005 See also `overlay-arrow-string'.");
5006 Voverlay_arrow_position
= Qnil
;
5008 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
5009 "String to display as an arrow. See also `overlay-arrow-position'.");
5010 Voverlay_arrow_string
= Qnil
;
5012 DEFVAR_INT ("scroll-step", &scroll_step
,
5013 "*The number of lines to try scrolling a window by when point moves out.\n\
5014 If that fails to bring point back on frame, point is centered instead.\n\
5015 If this is zero, point is always centered after it moves off frame.");
5017 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
5018 "*Scroll up to this many lines, to bring point back on screen.");
5019 scroll_conservatively
= 0;
5021 DEFVAR_INT ("scroll-margin", &scroll_margin
,
5022 "*Number of lines of margin at the top and bottom of a window.\n\
5023 Recenter the window whenever point gets within this many lines\n\
5024 of the top or bottom of the window.");
5027 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
5029 DEFVAR_BOOL ("truncate-partial-width-windows",
5030 &truncate_partial_width_windows
,
5031 "*Non-nil means truncate lines in all windows less than full frame wide.");
5032 truncate_partial_width_windows
= 1;
5034 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
5035 "*Non-nil means use inverse video for the mode line.");
5036 mode_line_inverse_video
= 1;
5038 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
5039 "*Maximum buffer size for which line number should be displayed.");
5040 line_number_display_limit
= 1000000;
5042 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
5043 "*Non-nil means highlight region even in nonselected windows.");
5044 highlight_nonselected_windows
= 0;
5046 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
5047 "Non-nil if more than one frame is visible on this display.\n\
5048 Minibuffer-only frames don't count, but iconified frames do.\n\
5049 This variable is not guaranteed to be accurate except while processing\n\
5050 `frame-title-format' and `icon-title-format'.");
5052 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
5053 "Template for displaying the titlebar of visible frames.\n\
5054 \(Assuming the window manager supports this feature.)\n\
5055 This variable has the same structure as `mode-line-format' (which see),\n\
5056 and is used only on frames for which no explicit name has been set\n\
5057 \(see `modify-frame-parameters').");
5058 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
5059 "Template for displaying the titlebar of an iconified frame.\n\
5060 \(Assuming the window manager supports this feature.)\n\
5061 This variable has the same structure as `mode-line-format' (which see),\n\
5062 and is used only on frames for which no explicit name has been set\n\
5063 \(see `modify-frame-parameters').");
5065 = Vframe_title_format
5066 = Fcons (intern ("multiple-frames"),
5067 Fcons (build_string ("%b"),
5068 Fcons (Fcons (build_string (""),
5069 Fcons (intern ("invocation-name"),
5070 Fcons (build_string ("@"),
5071 Fcons (intern ("system-name"),
5075 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
5076 "Maximum number of lines to keep in the message log buffer.\n\
5077 If nil, disable message logging. If t, log messages but don't truncate\n\
5078 the buffer when it becomes large.");
5079 XSETFASTINT (Vmessage_log_max
, 50);
5081 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
5082 "Functions called before redisplay, if window sizes have changed.\n\
5083 The value should be a list of functions that take one argument.\n\
5084 Just before redisplay, for each frame, if any of its windows have changed\n\
5085 size since the last redisplay, or have been split or deleted,\n\
5086 all the functions in the list are called, with the frame as argument.");
5087 Vwindow_size_change_functions
= Qnil
;
5089 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
5090 "List of Functions to call before redisplaying a window with scrolling.\n\
5091 Each function is called with two arguments, the window\n\
5092 and its new display-start position. Note that the value of `window-end'\n\
5093 is not valid when these functions are called.");
5094 Vwindow_scroll_functions
= Qnil
;
5097 /* initialize the window system */
5100 Lisp_Object root_window
;
5101 #ifndef COMPILER_REGISTER_BUG
5103 #endif /* COMPILER_REGISTER_BUG */
5104 struct window
*mini_w
;
5106 this_line_bufpos
= 0;
5108 mini_w
= XWINDOW (minibuf_window
);
5109 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
5111 echo_area_glyphs
= 0;
5112 previous_echo_glyphs
= 0;
5114 if (!noninteractive
)
5116 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
5117 XSETFASTINT (XWINDOW (root_window
)->top
, FRAME_MENU_BAR_LINES (f
));
5118 set_window_height (root_window
,
5119 FRAME_HEIGHT (f
) - 1 - FRAME_MENU_BAR_LINES (f
),
5121 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
5122 set_window_height (minibuf_window
, 1, 0);
5124 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
5125 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));