1 /* Display generation from window structure and buffer text.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
24 /*#include <ctype.h>*/
30 #include "dispextern.h"
36 #include "termhooks.h"
37 #include "intervals.h"
40 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
41 extern void set_frame_menubar ();
44 extern int interrupt_input
;
45 extern int command_loop_level
;
47 extern Lisp_Object Qface
;
49 extern Lisp_Object Voverriding_local_map
;
50 extern Lisp_Object Voverriding_local_map_menu_flag
;
52 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
53 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
54 Lisp_Object Qredisplay_end_trigger_functions
;
56 /* Nonzero means print newline to stdout before next minibuffer message. */
58 int noninteractive_need_newline
;
60 /* Nonzero means print newline to message log before next message. */
62 static int message_log_need_newline
;
64 #define min(a, b) ((a) < (b) ? (a) : (b))
65 #define max(a, b) ((a) > (b) ? (a) : (b))
66 #define minmax(floor, val, ceil) \
67 ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val))
69 /* The buffer position of the first character appearing
70 entirely or partially on the current frame line.
71 Or zero, which disables the optimization for the current frame line. */
72 static int this_line_bufpos
;
74 /* Number of characters past the end of this line,
75 including the terminating newline */
76 static int this_line_endpos
;
78 /* The vertical position of this frame line. */
79 static int this_line_vpos
;
81 /* Hpos value for start of display on this frame line.
82 Usually zero, but negative if first character really began
84 static int this_line_start_hpos
;
86 /* Buffer that this_line variables are describing. */
87 static struct buffer
*this_line_buffer
;
89 /* Value of echo_area_glyphs when it was last acted on.
90 If this is nonzero, there is a message on the frame
91 in the minibuffer and it should be erased as soon
92 as it is no longer requested to appear. */
93 char *previous_echo_glyphs
;
95 /* Nonzero means truncate lines in all windows less wide than the frame */
96 int truncate_partial_width_windows
;
98 /* Nonzero means we have more than one non-minibuffer-only frame.
99 Not guaranteed to be accurate except while parsing frame-title-format. */
102 Lisp_Object Vglobal_mode_string
;
104 /* Marker for where to display an arrow on top of the buffer text. */
105 Lisp_Object Voverlay_arrow_position
;
107 /* String to display for the arrow. */
108 Lisp_Object Voverlay_arrow_string
;
110 /* Like mode-line-format, but for the titlebar on a visible frame. */
111 Lisp_Object Vframe_title_format
;
113 /* Like mode-line-format, but for the titlebar on an iconified frame. */
114 Lisp_Object Vicon_title_format
;
116 /* List of functions to call when a window's size changes. These
117 functions get one arg, a frame on which one or more windows' sizes
119 static Lisp_Object Vwindow_size_change_functions
;
121 /* Values of those variables at last redisplay. */
122 static Lisp_Object last_arrow_position
, last_arrow_string
;
124 Lisp_Object Qmenu_bar_update_hook
;
126 /* Nonzero if overlay arrow has been displayed once in this window. */
127 static int overlay_arrow_seen
;
129 /* Nonzero if visible end of buffer has already been displayed once
130 in this window. (We need this variable in case there are overlay
131 strings that get displayed there.) */
132 static int zv_strings_seen
;
134 /* Nonzero means highlight the region even in nonselected windows. */
135 static int highlight_nonselected_windows
;
137 /* If cursor motion alone moves point off frame,
138 Try scrolling this many lines up or down if that will bring it back. */
139 static int scroll_step
;
141 /* Nonzero if try_window_id has made blank lines at window bottom
142 since the last redisplay that paused */
143 static int blank_end_of_window
;
145 /* Number of windows showing the buffer of the selected window
146 (or another buffer with the same base buffer).
147 keyboard.c refers to this. */
150 /* display_text_line sets these to the frame position (origin 0) of point,
151 whether the window is selected or not.
152 Set one to -1 first to determine whether point was found afterwards. */
154 static int cursor_vpos
;
155 static int cursor_hpos
;
157 static int debug_end_pos
;
159 /* Nonzero means display mode line highlighted */
160 int mode_line_inverse_video
;
162 static void redisplay_internal ();
163 static int message_log_check_duplicate ();
164 static void echo_area_display ();
165 void mark_window_display_accurate ();
166 static void redisplay_windows ();
167 static void redisplay_window ();
168 static void update_menu_bar ();
169 static void try_window ();
170 static int try_window_id ();
171 static struct position
*display_text_line ();
172 static void display_mode_line ();
173 static int display_mode_element ();
174 static char *decode_mode_spec ();
175 static int display_string ();
176 static void display_menu_bar ();
177 static int display_count_lines ();
179 /* Prompt to display in front of the minibuffer contents */
180 Lisp_Object minibuf_prompt
;
182 /* Width in columns of current minibuffer prompt. */
183 int minibuf_prompt_width
;
185 /* Message to display instead of minibuffer contents
186 This is what the functions error and message make,
187 and command echoing uses it as well.
188 It overrides the minibuf_prompt as well as the buffer. */
189 char *echo_area_glyphs
;
191 /* This is the length of the message in echo_area_glyphs. */
192 int echo_area_glyphs_length
;
194 /* This is the window where the echo area message was displayed.
195 It is always a minibuffer window, but it may not be the
196 same window currently active as a minibuffer. */
197 Lisp_Object echo_area_window
;
199 /* true iff we should redraw the mode lines on the next redisplay */
200 int update_mode_lines
;
202 /* Smallest number of characters before the gap
203 at any time since last redisplay that finished.
204 Valid for current buffer when try_window_id can be called. */
207 /* Smallest number of characters after the gap
208 at any time since last redisplay that finished.
209 Valid for current buffer when try_window_id can be called. */
212 /* MODIFF as of last redisplay that finished;
213 if it matches MODIFF, beg_unchanged and end_unchanged
214 contain no useful information */
215 int unchanged_modified
;
217 /* Nonzero if window sizes or contents have changed
218 since last redisplay that finished */
219 int windows_or_buffers_changed
;
221 /* Nonzero after display_mode_line if %l was used
222 and it displayed a line number. */
223 int line_number_displayed
;
225 /* Maximum buffer size for which to display line numbers. */
226 static int line_number_display_limit
;
228 /* Number of lines to keep in the message log buffer.
229 t means infinite. nil means don't log at all. */
230 Lisp_Object Vmessage_log_max
;
232 /* Output a newline in the *Messages* buffer if "needs" one. */
235 message_log_maybe_newline ()
237 if (message_log_need_newline
)
238 message_dolog ("", 0, 1);
242 /* Add a string to the message log, optionally terminated with a newline.
243 This function calls low-level routines in order to bypass text property
244 hooks, etc. which might not be safe to run. */
247 message_dolog (m
, len
, nlflag
)
251 if (!NILP (Vmessage_log_max
))
253 struct buffer
*oldbuf
;
254 int oldpoint
, oldbegv
, oldzv
;
255 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
257 oldbuf
= current_buffer
;
258 Fset_buffer (Fget_buffer_create (build_string ("*Messages*")));
259 current_buffer
->undo_list
= Qt
;
266 oldpoint
+= len
+ nlflag
;
268 oldzv
+= len
+ nlflag
;
271 insert_1 (m
, len
, 1, 0);
274 int this_bol
, prev_bol
, dup
;
275 insert_1 ("\n", 1, 1, 0);
277 this_bol
= scan_buffer ('\n', Z
, 0, -2, 0, 0);
280 prev_bol
= scan_buffer ('\n', this_bol
, 0, -2, 0, 0);
281 dup
= message_log_check_duplicate (prev_bol
, this_bol
);
284 if (oldpoint
> prev_bol
)
285 oldpoint
-= min (this_bol
, oldpoint
) - prev_bol
;
286 if (oldbegv
> prev_bol
)
287 oldbegv
-= min (this_bol
, oldbegv
) - prev_bol
;
288 if (oldzv
> prev_bol
)
289 oldzv
-= min (this_bol
, oldzv
) - prev_bol
;
290 del_range_1 (prev_bol
, this_bol
, 0);
296 /* If you change this format, don't forget to also
297 change message_log_check_duplicate. */
298 sprintf (dupstr
, " [%d times]", dup
);
299 duplen
= strlen (dupstr
);
305 insert_1 (dupstr
, duplen
, 1, 0);
310 if (NATNUMP (Vmessage_log_max
))
312 int pos
= scan_buffer ('\n', Z
, 0,
313 -XFASTINT (Vmessage_log_max
) - 1, 0, 0);
314 oldpoint
-= min (pos
, oldpoint
) - BEG
;
315 oldbegv
-= min (pos
, oldbegv
) - BEG
;
316 oldzv
-= min (pos
, oldzv
) - BEG
;
317 del_range_1 (BEG
, pos
, 0);
322 TEMP_SET_PT (oldpoint
);
323 set_buffer_internal (oldbuf
);
324 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
325 message_log_need_newline
= !nlflag
;
329 /* We are at the end of the buffer after just having inserted a newline.
330 (Note: We depend on the fact we won't be crossing the gap.)
331 Check to see if the most recent message looks a lot like the previous one.
332 Return 0 if different, 1 if the new one should just replace it, or a
333 value N > 1 if we should also append " [N times]". */
336 message_log_check_duplicate (prev_bol
, this_bol
)
337 int prev_bol
, this_bol
;
340 int len
= Z
- 1 - this_bol
;
342 unsigned char *p1
= BUF_CHAR_ADDRESS (current_buffer
, prev_bol
);
343 unsigned char *p2
= BUF_CHAR_ADDRESS (current_buffer
, this_bol
);
345 for (i
= 0; i
< len
; i
++)
347 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.'
356 if (*p1
++ == ' ' && *p1
++ == '[')
359 while (*p1
>= '0' && *p1
<= '9')
360 n
= n
* 10 + *p1
++ - '0';
361 if (strncmp (p1
, " times]\n", 8) == 0)
367 /* Display an echo area message M with a specified length of LEN chars.
368 The string may include null characters. If M is 0, clear out any
369 existing message, and let the minibuffer text show through.
371 The buffer M must continue to exist until after the echo area
372 gets cleared or some other message gets displayed there.
374 Do not pass text that is stored in a Lisp string.
375 Do not pass text in a buffer that was alloca'd. */
382 /* First flush out any partial line written with print. */
383 message_log_maybe_newline ();
385 message_dolog (m
, len
, 1);
386 message2_nolog (m
, len
);
390 /* The non-logging counterpart of message2. */
393 message2_nolog (m
, len
)
399 if (noninteractive_need_newline
)
401 noninteractive_need_newline
= 0;
402 fwrite (m
, len
, 1, stderr
);
403 if (cursor_in_echo_area
== 0)
404 fprintf (stderr
, "\n");
407 /* A null message buffer means that the frame hasn't really been
408 initialized yet. Error messages get reported properly by
409 cmd_error, so this must be just an informative message; toss it. */
410 else if (INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
412 Lisp_Object mini_window
;
415 /* Get the frame containing the minibuffer
416 that the selected frame is using. */
417 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
418 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
421 FRAME_SAMPLE_VISIBILITY (f
);
422 if (FRAME_VISIBLE_P (selected_frame
)
423 && ! FRAME_VISIBLE_P (f
))
424 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
429 echo_area_glyphs
= m
;
430 echo_area_glyphs_length
= len
;
433 echo_area_glyphs
= previous_echo_glyphs
= 0;
435 do_pending_window_change ();
436 echo_area_display ();
437 update_frame (f
, 1, 1);
438 do_pending_window_change ();
439 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
440 (*frame_up_to_date_hook
) (f
);
444 /* Display a null-terminated echo area message M. If M is 0, clear out any
445 existing message, and let the minibuffer text show through.
447 The buffer M must continue to exist until after the echo area
448 gets cleared or some other message gets displayed there.
450 Do not pass text that is stored in a Lisp string.
451 Do not pass text in a buffer that was alloca'd. */
457 message2 (m
, (m
? strlen (m
) : 0));
464 message2_nolog (m
, (m
? strlen (m
) : 0));
467 /* Truncate what will be displayed in the echo area
468 the next time we display it--but don't redisplay it now. */
471 truncate_echo_area (len
)
474 /* A null message buffer means that the frame hasn't really been
475 initialized yet. Error messages get reported properly by
476 cmd_error, so this must be just an informative message; toss it. */
477 if (!noninteractive
&& INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
478 echo_area_glyphs_length
= len
;
481 /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print;
482 zero if being used by message. */
483 int message_buf_print
;
485 /* Dump an informative message to the minibuf. If M is 0, clear out
486 any existing message, and let the minibuffer text show through. */
490 message (m
, a1
, a2
, a3
)
492 EMACS_INT a1
, a2
, a3
;
498 if (noninteractive_need_newline
)
500 noninteractive_need_newline
= 0;
501 fprintf (stderr
, m
, a1
, a2
, a3
);
502 if (cursor_in_echo_area
== 0)
503 fprintf (stderr
, "\n");
507 else if (INTERACTIVE
)
509 /* The frame whose minibuffer we're going to display the message on.
510 It may be larger than the selected frame, so we need
511 to use its buffer, not the selected frame's buffer. */
512 Lisp_Object mini_window
;
515 /* Get the frame containing the minibuffer
516 that the selected frame is using. */
517 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
518 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
520 /* A null message buffer means that the frame hasn't really been
521 initialized yet. Error messages get reported properly by
522 cmd_error, so this must be just an informative message; toss it. */
523 if (FRAME_MESSAGE_BUF (f
))
534 len
= doprnt (FRAME_MESSAGE_BUF (f
),
535 FRAME_WIDTH (f
), m
, (char *)0, 3, a
);
537 len
= doprnt (FRAME_MESSAGE_BUF (f
),
538 FRAME_WIDTH (f
), m
, (char *)0, 3, &a1
);
539 #endif /* NO_ARG_ARRAY */
541 message2 (FRAME_MESSAGE_BUF (f
), len
);
546 /* Print should start at the beginning of the message
548 message_buf_print
= 0;
553 /* The non-logging version of message. */
555 message_nolog (m
, a1
, a2
, a3
)
557 EMACS_INT a1
, a2
, a3
;
559 Lisp_Object old_log_max
;
560 old_log_max
= Vmessage_log_max
;
561 Vmessage_log_max
= Qnil
;
562 message (m
, a1
, a2
, a3
);
563 Vmessage_log_max
= old_log_max
;
569 message2 (echo_area_glyphs
, echo_area_glyphs_length
);
577 Lisp_Object mini_window
;
579 /* Choose the minibuffer window for this display.
580 It is the minibuffer window used by the selected frame. */
581 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
582 /* This is the frame that window is in. */
583 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
585 if (! FRAME_VISIBLE_P (f
))
590 redraw_garbaged_frames ();
594 if (echo_area_glyphs
|| minibuf_level
== 0)
596 echo_area_window
= mini_window
;
598 vpos
= XFASTINT (XWINDOW (mini_window
)->top
);
599 get_display_line (f
, vpos
, 0);
600 display_string (XWINDOW (mini_window
), vpos
,
601 echo_area_glyphs
? echo_area_glyphs
: "",
602 echo_area_glyphs
? echo_area_glyphs_length
: -1,
603 0, 0, 0, 0, FRAME_WIDTH (f
));
605 #if 0 /* This just gets in the way. update_frame does the job. */
606 /* If desired cursor location is on this line, put it at end of text */
607 if (cursor_in_echo_area
)
608 FRAME_CURSOR_Y (f
) = vpos
;
609 if (FRAME_CURSOR_Y (f
) == vpos
)
610 FRAME_CURSOR_X (f
) = FRAME_DESIRED_GLYPHS (f
)->used
[vpos
];
613 /* Fill the rest of the minibuffer window with blank lines. */
618 i
< vpos
+ XFASTINT (XWINDOW (mini_window
)->height
); i
++)
620 get_display_line (f
, i
, 0);
621 display_string (XWINDOW (mini_window
), vpos
,
622 "", 0, 0, 0, 0, 0, FRAME_WIDTH (f
));
626 else if (!EQ (mini_window
, selected_window
))
627 windows_or_buffers_changed
++;
629 if (EQ (mini_window
, selected_window
))
630 this_line_bufpos
= 0;
632 previous_echo_glyphs
= echo_area_glyphs
;
635 /* Update frame titles. */
637 #ifdef HAVE_WINDOW_SYSTEM
638 static char frame_title_buf
[512];
639 static char *frame_title_ptr
;
642 store_frame_title (str
, mincol
, maxcol
)
647 if (maxcol
< 0 || maxcol
>= sizeof(frame_title_buf
))
648 maxcol
= sizeof (frame_title_buf
);
649 limit
= &frame_title_buf
[maxcol
];
650 while (*str
!= '\0' && frame_title_ptr
< limit
)
651 *frame_title_ptr
++ = *str
++;
652 while (frame_title_ptr
< &frame_title_buf
[mincol
])
653 *frame_title_ptr
++ = ' ';
654 return frame_title_ptr
- frame_title_buf
;
658 x_consider_frame_title (frame
)
664 FRAME_PTR f
= XFRAME (frame
);
666 if (!(FRAME_WINDOW_P (f
) || FRAME_MINIBUF_ONLY_P (f
) || f
->explicit_name
))
669 /* Do we have more than one visible frame on this X display? */
673 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
675 FRAME_PTR tf
= XFRAME (XCONS (tail
)->car
);
677 if (tf
!= f
&& FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
678 && !FRAME_MINIBUF_ONLY_P (tf
)
679 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
683 multiple_frames
= CONSP (tail
);
686 obuf
= current_buffer
;
687 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
688 fmt
= (FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
);
689 frame_title_ptr
= frame_title_buf
;
690 len
= display_mode_element (XWINDOW (f
->selected_window
), 0, 0, 0,
691 0, sizeof (frame_title_buf
), fmt
);
693 set_buffer_internal (obuf
);
694 /* Set the name only if it's changed. This avoids consing
695 in the common case where it hasn't. (If it turns out that we've
696 already wasted too much time by walking through the list with
697 display_mode_element, then we might need to optimize at a higher
699 if (! STRINGP (f
->name
) || XSTRING (f
->name
)->size
!= len
700 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
701 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
704 #define frame_title_ptr ((char *)0)
705 #define store_frame_title(str, mincol, maxcol) 0
708 /* Prepare for redisplay by updating menu-bar item lists when appropriate.
709 This can call eval. */
714 register struct window
*w
= XWINDOW (selected_window
);
716 struct gcpro gcpro1
, gcpro2
;
718 all_windows
= (update_mode_lines
|| buffer_shared
> 1
719 || windows_or_buffers_changed
);
721 /* Update all frame titles based on their buffer names, etc.
722 We do this before the menu bars so that the buffer-menu
723 will show the up-to-date frame titles.
725 This used to be done after the menu bars, for a reason that
726 was stated as follows but which I do not understand:
727 "We do this after the menu bars so that the frame will first
728 create its menu bar using the name `emacs' if no other name
729 has yet been specified."
730 I think that is no longer a concern. */
731 #ifdef HAVE_WINDOW_SYSTEM
732 if (windows_or_buffers_changed
|| update_mode_lines
)
734 Lisp_Object tail
, frame
;
736 FOR_EACH_FRAME (tail
, frame
)
737 if (FRAME_VISIBLE_P (XFRAME (frame
))
738 || FRAME_ICONIFIED_P (XFRAME (frame
)))
739 x_consider_frame_title (frame
);
743 /* Update the menu bar item lists, if appropriate.
744 This has to be done before any actual redisplay
745 or generation of display lines. */
748 Lisp_Object tail
, frame
;
749 int count
= specpdl_ptr
- specpdl
;
751 record_unwind_protect (Fstore_match_data
, Fmatch_data ());
753 FOR_EACH_FRAME (tail
, frame
)
755 /* If a window on this frame changed size,
756 report that to the user and clear the size-change flag. */
757 if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)))
759 Lisp_Object functions
;
760 /* Clear flag first in case we get error below. */
761 FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)) = 0;
762 functions
= Vwindow_size_change_functions
;
763 GCPRO2 (tail
, functions
);
764 while (CONSP (functions
))
766 call1 (XCONS (functions
)->car
, frame
);
767 functions
= XCONS (functions
)->cdr
;
772 update_menu_bar (XFRAME (frame
), 0);
776 unbind_to (count
, Qnil
);
779 update_menu_bar (selected_frame
, 1);
782 /* Do a frame update, taking possible shortcuts into account.
783 This is the main external entry point for redisplay.
785 If the last redisplay displayed an echo area message and that
786 message is no longer requested, we clear the echo area
787 or bring back the minibuffer if that is in use.
789 Do not call eval from within this function.
790 Calls to eval after the call to echo_area_display would confuse
791 the display_line mechanism and would cause a crash.
792 Calls to eval before that point will work most of the time,
793 but can still lose, because this function
794 can be called from signal handlers; with alarms set up;
795 or with synchronous processes running.
797 See Fcall_process; if you called it from here, it could be
798 entered recursively. */
800 static int do_verify_charstarts
;
802 /* Counter is used to clear the face cache
803 no more than once ever 1000 redisplays. */
804 static int clear_face_cache_count
;
806 /* Record the previous terminal frame we displayed. */
807 static FRAME_PTR previous_terminal_frame
;
812 redisplay_internal (0);
815 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay
816 is not in response to any user action; therefore, we should
817 preserve the echo area. (Actually, our caller does that job.)
818 Perhaps in the future avoid recentering windows
819 if it is not necessary; currently that causes some problems. */
822 redisplay_internal (preserve_echo_area
)
823 int preserve_echo_area
;
825 register struct window
*w
= XWINDOW (selected_window
);
829 register int tlbufpos
, tlendpos
;
836 if (popup_activated ())
841 if (FRAME_TERMCAP_P (selected_frame
)
842 && previous_terminal_frame
!= selected_frame
)
844 /* Since frames on an ASCII terminal share the same display area,
845 displaying a different frame means redisplay the whole thing. */
846 windows_or_buffers_changed
++;
847 SET_FRAME_GARBAGED (selected_frame
);
848 XSETFRAME (Vterminal_frame
, selected_frame
);
850 previous_terminal_frame
= selected_frame
;
853 /* Set the visible flags for all frames.
854 Do this before checking for resized or garbaged frames; they want
855 to know if their frames are visible.
856 See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */
858 Lisp_Object tail
, frame
;
860 FOR_EACH_FRAME (tail
, frame
)
862 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
864 /* Clear out all the display lines in which we will generate the
865 glyphs to display. */
866 init_desired_glyphs (XFRAME (frame
));
870 /* Notice any pending interrupt request to change frame size. */
871 do_pending_window_change ();
875 redraw_garbaged_frames ();
879 prepare_menu_bars ();
881 if (windows_or_buffers_changed
)
884 /* Detect case that we need to write a star in the mode line. */
885 if (XFASTINT (w
->last_modified
) < MODIFF
886 && XFASTINT (w
->last_modified
) <= SAVE_MODIFF
)
888 w
->update_mode_line
= Qt
;
889 if (buffer_shared
> 1)
893 /* If %c is in use, update it if needed. */
894 if (!NILP (w
->column_number_displayed
)
895 /* This alternative quickly identifies a common case
896 where no change is needed. */
897 && !(PT
== XFASTINT (w
->last_point
)
898 && XFASTINT (w
->last_modified
) >= MODIFF
)
899 && XFASTINT (w
->column_number_displayed
) != current_column ())
900 w
->update_mode_line
= Qt
;
902 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
904 all_windows
= update_mode_lines
|| buffer_shared
> 1;
906 /* If specs for an arrow have changed, do thorough redisplay
907 to ensure we remove any arrow that should no longer exist. */
908 if (! EQ (Voverlay_arrow_position
, last_arrow_position
)
909 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
912 /* Normally the message* functions will have already displayed and
913 updated the echo area, but the frame may have been trashed, or
914 the update may have been preempted, so display the echo area
916 if (echo_area_glyphs
|| previous_echo_glyphs
)
918 echo_area_display ();
922 /* If showing region, and mark has changed, must redisplay whole window. */
923 if (((!NILP (Vtransient_mark_mode
)
924 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
925 != !NILP (w
->region_showing
))
926 || (!NILP (w
->region_showing
)
927 && !EQ (w
->region_showing
,
928 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
929 this_line_bufpos
= -1;
931 tlbufpos
= this_line_bufpos
;
932 tlendpos
= this_line_endpos
;
933 if (!all_windows
&& tlbufpos
> 0 && NILP (w
->update_mode_line
)
934 && !current_buffer
->clip_changed
935 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
936 /* Make sure recorded data applies to current buffer, etc */
937 && this_line_buffer
== current_buffer
938 && current_buffer
== XBUFFER (w
->buffer
)
939 && NILP (w
->force_start
)
940 /* Point must be on the line that we have info recorded about */
942 && PT
<= Z
- tlendpos
943 /* All text outside that line, including its final newline,
945 && (XFASTINT (w
->last_modified
) >= MODIFF
946 || (beg_unchanged
>= tlbufpos
- 1
948 /* If selective display, can't optimize
949 if the changes start at the beginning of the line. */
950 && ((INTEGERP (current_buffer
->selective_display
)
951 && XINT (current_buffer
->selective_display
) > 0
952 ? (beg_unchanged
>= tlbufpos
955 && end_unchanged
>= tlendpos
956 && Z
- GPT
>= tlendpos
)))
958 if (tlbufpos
> BEGV
&& FETCH_CHAR (tlbufpos
- 1) != '\n'
960 || FETCH_CHAR (tlbufpos
) == '\n'))
961 /* Former continuation line has disappeared by becoming empty */
963 else if (XFASTINT (w
->last_modified
) < MODIFF
964 || MINI_WINDOW_P (w
))
967 overlay_arrow_seen
= 0;
969 display_text_line (w
, tlbufpos
, this_line_vpos
, this_line_start_hpos
,
970 pos_tab_offset (w
, tlbufpos
));
971 /* If line contains point, is not continued,
972 and ends at same distance from eob as before, we win */
973 if (cursor_vpos
>= 0 && this_line_bufpos
974 && this_line_endpos
== tlendpos
)
976 /* If this is not the window's last line,
977 we must adjust the charstarts of the lines below. */
978 if (this_line_vpos
+ 1
979 < XFASTINT (w
->top
) + window_internal_height (w
))
981 int left
= XFASTINT (w
->left
);
982 int *charstart_next_line
983 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[this_line_vpos
+ 1];
986 if (Z
- tlendpos
== ZV
)
987 /* This line ends at end of (accessible part of) buffer.
988 There is no newline to count. */
989 adjust
= Z
- tlendpos
- charstart_next_line
[left
];
991 /* This line ends in a newline.
992 Must take account of the newline and the rest of the
993 text that follows. */
994 adjust
= Z
- tlendpos
+ 1 - charstart_next_line
[left
];
996 adjust_window_charstarts (w
, this_line_vpos
, adjust
);
999 if (XFASTINT (w
->width
) != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w
))))
1000 preserve_other_columns (w
);
1006 else if (PT
== XFASTINT (w
->last_point
)
1007 /* Make sure the cursor was last displayed
1008 in this window. Otherwise we have to reposition it. */
1009 && XINT (w
->top
) <= FRAME_CURSOR_Y (selected_frame
)
1010 && (XINT (w
->top
) + XINT (w
->height
)
1011 > FRAME_CURSOR_Y (selected_frame
)))
1015 do_pending_window_change ();
1020 /* If highlighting the region, or if the cursor is in the echo area,
1021 then we can't just move the cursor. */
1022 else if (! (!NILP (Vtransient_mark_mode
)
1023 && !NILP (current_buffer
->mark_active
))
1024 && NILP (w
->region_showing
)
1025 && !cursor_in_echo_area
)
1027 pos
= *compute_motion (tlbufpos
, 0,
1028 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1030 PT
, 2, - (1 << (BITS_PER_SHORT
- 1)),
1031 window_internal_width (w
) - 1,
1033 pos_tab_offset (w
, tlbufpos
), w
);
1036 int width
= window_internal_width (w
) - 1;
1037 FRAME_CURSOR_X (selected_frame
)
1038 = XFASTINT (w
->left
) + minmax (0, pos
.hpos
, width
);
1039 FRAME_CURSOR_Y (selected_frame
) = this_line_vpos
;
1046 /* Text changed drastically or point moved off of line */
1047 cancel_line (this_line_vpos
, selected_frame
);
1050 this_line_bufpos
= 0;
1051 all_windows
|= buffer_shared
> 1;
1053 clear_face_cache_count
++;
1057 Lisp_Object tail
, frame
;
1060 /* Clear the face cache, only when we do a full redisplay
1061 and not too often either. */
1062 if (clear_face_cache_count
> 1000)
1064 clear_face_cache ();
1065 clear_face_cache_count
= 0;
1069 /* Recompute # windows showing selected buffer.
1070 This will be incremented each time such a window is displayed. */
1073 FOR_EACH_FRAME (tail
, frame
)
1075 FRAME_PTR f
= XFRAME (frame
);
1076 if (! FRAME_TERMCAP_P (f
) || f
== selected_frame
)
1079 /* Mark all the scroll bars to be removed; we'll redeem the ones
1080 we want when we redisplay their windows. */
1081 if (condemn_scroll_bars_hook
)
1082 (*condemn_scroll_bars_hook
) (f
);
1084 if (FRAME_VISIBLE_P (f
))
1085 redisplay_windows (FRAME_ROOT_WINDOW (f
), preserve_echo_area
);
1087 /* Any scroll bars which redisplay_windows should have nuked
1088 should now go away. */
1089 if (judge_scroll_bars_hook
)
1090 (*judge_scroll_bars_hook
) (f
);
1094 else if (FRAME_VISIBLE_P (selected_frame
))
1096 redisplay_window (selected_window
, 1, preserve_echo_area
);
1097 if (XFASTINT (w
->width
) != FRAME_WIDTH (selected_frame
))
1098 preserve_other_columns (w
);
1102 /* Prevent various kinds of signals during display update.
1103 stdio is not robust about handling signals,
1104 which can cause an apparent I/O error. */
1105 if (interrupt_input
)
1116 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1120 if (!FRAMEP (XCONS (tail
)->car
))
1123 f
= XFRAME (XCONS (tail
)->car
);
1125 if ((! FRAME_TERMCAP_P (f
) || f
== selected_frame
)
1126 && FRAME_VISIBLE_P (f
))
1128 pause
|= update_frame (f
, 0, 0);
1131 mark_window_display_accurate (f
->root_window
, 1);
1132 if (frame_up_to_date_hook
!= 0)
1133 (*frame_up_to_date_hook
) (f
);
1139 #endif /* MULTI_FRAME */
1141 if (FRAME_VISIBLE_P (selected_frame
))
1142 pause
= update_frame (selected_frame
, 0, 0);
1146 /* We may have called echo_area_display at the top of this
1147 function. If the echo area is on another frame, that may
1148 have put text on a frame other than the selected one, so the
1149 above call to update_frame would not have caught it. Catch
1152 Lisp_Object mini_window
;
1153 FRAME_PTR mini_frame
;
1155 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
1156 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
1158 if (mini_frame
!= selected_frame
1159 && ! FRAME_TERMCAP_P (mini_frame
))
1160 pause
|= update_frame (mini_frame
, 0, 0);
1164 /* If frame does not match, prevent doing single-line-update next time.
1165 Also, don't forget to check every line to update the arrow. */
1168 this_line_bufpos
= 0;
1169 if (!NILP (last_arrow_position
))
1171 last_arrow_position
= Qt
;
1172 last_arrow_string
= Qt
;
1174 /* If we pause after scrolling, some lines in current_frame
1175 may be null, so preserve_other_columns won't be able to
1176 preserve all the vertical-bar separators. So, avoid using it
1178 if (XFASTINT (w
->width
) != FRAME_WIDTH (selected_frame
))
1179 update_mode_lines
= 1;
1182 /* Now text on frame agrees with windows, so
1183 put info into the windows for partial redisplay to follow */
1187 register struct buffer
*b
= XBUFFER (w
->buffer
);
1189 blank_end_of_window
= 0;
1190 unchanged_modified
= BUF_MODIFF (b
);
1191 beg_unchanged
= BUF_GPT (b
) - BUF_BEG (b
);
1192 end_unchanged
= BUF_Z (b
) - BUF_GPT (b
);
1194 XSETFASTINT (w
->last_point
, BUF_PT (b
));
1195 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (selected_frame
));
1196 XSETFASTINT (w
->last_point_y
, FRAME_CURSOR_Y (selected_frame
));
1199 mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame
), 1);
1202 b
->clip_changed
= 0;
1203 w
->update_mode_line
= Qnil
;
1204 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
1205 w
->window_end_valid
= w
->buffer
;
1206 last_arrow_position
= Voverlay_arrow_position
;
1207 last_arrow_string
= Voverlay_arrow_string
;
1208 if (do_verify_charstarts
)
1209 verify_charstarts (w
);
1210 if (frame_up_to_date_hook
!= 0)
1211 (*frame_up_to_date_hook
) (selected_frame
);
1213 update_mode_lines
= 0;
1214 windows_or_buffers_changed
= 0;
1217 /* Start SIGIO interrupts coming again.
1218 Having them off during the code above
1219 makes it less likely one will discard output,
1220 but not impossible, since there might be stuff
1221 in the system buffer here.
1222 But it is much hairier to try to do anything about that. */
1224 if (interrupt_input
)
1228 /* Change frame size now if a change is pending. */
1229 do_pending_window_change ();
1231 /* If we just did a pending size change, redisplay again
1232 for the new size. */
1233 if (windows_or_buffers_changed
&& !pause
)
1237 /* Redisplay, but leave alone any recent echo area message
1238 unless another message has been requested in its place.
1240 This is useful in situations where you need to redisplay but no
1241 user action has occurred, making it inappropriate for the message
1242 area to be cleared. See tracking_off and
1243 wait_reading_process_input for examples of these situations. */
1245 redisplay_preserve_echo_area ()
1247 if (echo_area_glyphs
== 0 && previous_echo_glyphs
!= 0)
1249 echo_area_glyphs
= previous_echo_glyphs
;
1250 redisplay_internal (1);
1251 echo_area_glyphs
= 0;
1254 redisplay_internal (1);
1258 mark_window_display_accurate (window
, flag
)
1262 register struct window
*w
;
1264 for (;!NILP (window
); window
= w
->next
)
1266 if (!WINDOWP (window
)) abort ();
1267 w
= XWINDOW (window
);
1269 if (!NILP (w
->buffer
))
1271 XSETFASTINT (w
->last_modified
,
1272 !flag
? 0 : BUF_MODIFF (XBUFFER (w
->buffer
)));
1274 /* Record if we are showing a region, so can make sure to
1275 update it fully at next redisplay. */
1276 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1277 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1278 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1282 w
->window_end_valid
= w
->buffer
;
1283 w
->update_mode_line
= Qnil
;
1284 if (!NILP (w
->buffer
) && flag
)
1285 XBUFFER (w
->buffer
)->clip_changed
= 0;
1287 if (!NILP (w
->vchild
))
1288 mark_window_display_accurate (w
->vchild
, flag
);
1289 if (!NILP (w
->hchild
))
1290 mark_window_display_accurate (w
->hchild
, flag
);
1295 last_arrow_position
= Voverlay_arrow_position
;
1296 last_arrow_string
= Voverlay_arrow_string
;
1300 /* t is unequal to any useful value of Voverlay_arrow_... */
1301 last_arrow_position
= Qt
;
1302 last_arrow_string
= Qt
;
1306 /* Update the menu bar item list for frame F.
1307 This has to be done before we start to fill in any display lines,
1308 because it can call eval.
1310 If SAVE_MATCH_DATA is 1, we must save and restore it here. */
1313 update_menu_bar (f
, save_match_data
)
1315 int save_match_data
;
1317 struct buffer
*old
= current_buffer
;
1319 register struct window
*w
;
1321 window
= FRAME_SELECTED_WINDOW (f
);
1322 w
= XWINDOW (window
);
1324 if (update_mode_lines
)
1325 w
->update_mode_line
= Qt
;
1327 if (FRAME_WINDOW_P (f
)
1329 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1330 FRAME_EXTERNAL_MENU_BAR (f
)
1332 FRAME_MENU_BAR_LINES (f
) > 0
1334 : FRAME_MENU_BAR_LINES (f
) > 0)
1336 /* If the user has switched buffers or windows, we need to
1337 recompute to reflect the new bindings. But we'll
1338 recompute when update_mode_lines is set too; that means
1339 that people can use force-mode-line-update to request
1340 that the menu bar be recomputed. The adverse effect on
1341 the rest of the redisplay algorithm is about the same as
1342 windows_or_buffers_changed anyway. */
1343 if (windows_or_buffers_changed
1344 || !NILP (w
->update_mode_line
)
1345 || (XFASTINT (w
->last_modified
) < MODIFF
1346 && (XFASTINT (w
->last_modified
)
1347 <= BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))))
1348 || ((!NILP (Vtransient_mark_mode
)
1349 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1350 != !NILP (w
->region_showing
)))
1352 struct buffer
*prev
= current_buffer
;
1353 int count
= specpdl_ptr
- specpdl
;
1355 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1356 if (save_match_data
)
1357 record_unwind_protect (Fstore_match_data
, Fmatch_data ());
1358 if (NILP (Voverriding_local_map_menu_flag
))
1360 specbind (Qoverriding_terminal_local_map
, Qnil
);
1361 specbind (Qoverriding_local_map
, Qnil
);
1364 /* Run the Lucid hook. */
1365 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
1366 /* If it has changed current-menubar from previous value,
1367 really recompute the menubar from the value. */
1368 if (! NILP (Vlucid_menu_bar_dirty_flag
))
1369 call0 (Qrecompute_lucid_menubar
);
1370 safe_run_hooks (Qmenu_bar_update_hook
);
1371 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
1372 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1373 if (FRAME_WINDOW_P (f
))
1374 set_frame_menubar (f
, 0, 0);
1375 #endif /* USE_X_TOOLKIT || HAVE_NTGUI */
1377 unbind_to (count
, Qnil
);
1378 set_buffer_internal_1 (prev
);
1385 /* Redisplay WINDOW and its subwindows and siblings. */
1388 redisplay_windows (window
, preserve_echo_area
)
1390 int preserve_echo_area
;
1392 for (; !NILP (window
); window
= XWINDOW (window
)->next
)
1393 redisplay_window (window
, 0, preserve_echo_area
);
1396 /* Redisplay window WINDOW and its subwindows. */
1399 redisplay_window (window
, just_this_one
, preserve_echo_area
)
1401 int just_this_one
, preserve_echo_area
;
1403 register struct window
*w
= XWINDOW (window
);
1404 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
1406 register int lpoint
= PT
;
1407 struct buffer
*old
= current_buffer
;
1408 register int width
= window_internal_width (w
) - 1;
1409 register int startp
;
1410 register int hscroll
= XINT (w
->hscroll
);
1411 struct position pos
;
1414 int update_mode_line
;
1415 struct Lisp_Char_Table
*dp
= window_display_table (w
);
1417 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1419 /* If this is a combination window, do its children; that's all. */
1421 if (!NILP (w
->vchild
))
1423 redisplay_windows (w
->vchild
, preserve_echo_area
);
1426 if (!NILP (w
->hchild
))
1428 redisplay_windows (w
->hchild
, preserve_echo_area
);
1431 if (NILP (w
->buffer
))
1434 height
= window_internal_height (w
);
1435 update_mode_line
= (!NILP (w
->update_mode_line
) || update_mode_lines
);
1436 if (XBUFFER (w
->buffer
)->clip_changed
)
1437 update_mode_line
= 1;
1439 if (MINI_WINDOW_P (w
))
1441 if (w
== XWINDOW (echo_area_window
) && echo_area_glyphs
)
1442 /* We've already displayed the echo area glyphs in this window. */
1443 goto finish_scroll_bars
;
1444 else if (w
!= XWINDOW (minibuf_window
))
1446 /* This is a minibuffer, but it's not the currently active one,
1448 int vpos
= XFASTINT (w
->top
);
1451 for (i
= 0; i
< height
; i
++)
1453 get_display_line (f
, vpos
+ i
, 0);
1454 display_string (w
, vpos
+ i
, "", 0, 0, 0, 1, 0, width
);
1457 goto finish_scroll_bars
;
1461 /* Otherwise set up data on this window; select its buffer and point value */
1463 if (update_mode_line
)
1464 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1466 set_buffer_temp (XBUFFER (w
->buffer
));
1470 /* If %c is in mode line, update it if needed. */
1471 if (!NILP (w
->column_number_displayed
)
1472 /* This alternative quickly identifies a common case
1473 where no change is needed. */
1474 && !(PT
== XFASTINT (w
->last_point
)
1475 && XFASTINT (w
->last_modified
) >= MODIFF
)
1476 && XFASTINT (w
->column_number_displayed
) != current_column ())
1477 update_mode_line
= 1;
1479 /* Count number of windows showing the selected buffer.
1480 An indirect buffer counts as its base buffer. */
1484 struct buffer
*current_base
, *window_base
;
1485 current_base
= current_buffer
;
1486 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
1487 if (current_base
->base_buffer
)
1488 current_base
= current_base
->base_buffer
;
1489 if (window_base
->base_buffer
)
1490 window_base
= window_base
->base_buffer
;
1491 if (current_base
== window_base
)
1495 /* POINT refers normally to the selected window.
1496 For any other window, set up appropriate value. */
1498 if (!EQ (window
, selected_window
))
1500 int new_pt
= marker_position (w
->pointm
);
1504 Fset_marker (w
->pointm
, make_number (new_pt
), Qnil
);
1506 else if (new_pt
> (ZV
- 1))
1509 Fset_marker (w
->pointm
, make_number (new_pt
), Qnil
);
1511 /* We don't use SET_PT so that the point-motion hooks don't run. */
1512 BUF_PT (current_buffer
) = new_pt
;
1515 /* If any of the character widths specified in the display table
1516 have changed, invalidate the width run cache. It's true that this
1517 may be a bit late to catch such changes, but the rest of
1518 redisplay goes (non-fatally) haywire when the display table is
1519 changed, so why should we worry about doing any better? */
1520 if (current_buffer
->width_run_cache
)
1522 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
1524 if (! disptab_matches_widthtab (disptab
,
1525 XVECTOR (current_buffer
->width_table
)))
1527 invalidate_region_cache (current_buffer
,
1528 current_buffer
->width_run_cache
,
1530 recompute_width_table (current_buffer
, disptab
);
1534 /* If window-start is screwed up, choose a new one. */
1535 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
1538 startp
= marker_position (w
->start
);
1540 /* Handle case where place to start displaying has been specified,
1541 unless the specified location is outside the accessible range. */
1542 if (!NILP (w
->force_start
))
1544 w
->force_start
= Qnil
;
1545 /* Forget any recorded base line for line number display. */
1546 w
->base_line_number
= Qnil
;
1547 /* Redisplay the mode line. Select the buffer properly for that.
1548 Also, run the hook window-scroll-functions
1549 because we have scrolled. */
1550 /* Note, we do this after clearing force_start because
1551 if there's an error, it is better to forget about force_start
1552 than to get into an infinite loop calling the hook functions
1553 and having them get more errors. */
1554 if (!update_mode_line
1555 || ! NILP (Vwindow_scroll_functions
))
1557 Lisp_Object temp
[3];
1559 set_buffer_temp (old
);
1560 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1561 update_mode_line
= 1;
1562 w
->update_mode_line
= Qt
;
1563 if (! NILP (Vwindow_scroll_functions
))
1565 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1566 make_number (startp
));
1567 startp
= marker_position (w
->start
);
1570 XSETFASTINT (w
->last_modified
, 0);
1571 if (startp
< BEGV
) startp
= BEGV
;
1572 if (startp
> ZV
) startp
= ZV
;
1573 try_window (window
, startp
);
1574 if (cursor_vpos
< 0)
1576 /* If point does not appear, move point so it does appear */
1577 pos
= *compute_motion (startp
, 0,
1578 (((EQ (window
, minibuf_window
)
1580 ? minibuf_prompt_width
: 0)
1581 + (hscroll
? 1 - hscroll
: 0)),
1584 - (1 << (BITS_PER_SHORT
- 1)),
1585 width
, hscroll
, pos_tab_offset (w
, startp
), w
);
1586 BUF_PT (current_buffer
) = pos
.bufpos
;
1587 if (w
!= XWINDOW (selected_window
))
1588 Fset_marker (w
->pointm
, make_number (PT
), Qnil
);
1591 if (current_buffer
== old
)
1593 FRAME_CURSOR_X (f
) = (XFASTINT (w
->left
)
1594 + minmax (0, pos
.hpos
, width
));
1595 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1597 /* If we are highlighting the region,
1598 then we just changed the region, so redisplay to show it. */
1599 if (!NILP (Vtransient_mark_mode
)
1600 && !NILP (current_buffer
->mark_active
))
1602 cancel_my_columns (XWINDOW (window
));
1603 try_window (window
, startp
);
1609 /* Handle case where text has not changed, only point,
1610 and it has not moved off the frame. */
1612 /* This code is not used for minibuffer for the sake of
1613 the case of redisplaying to replace an echo area message;
1614 since in that case the minibuffer contents per se are usually unchanged.
1615 This code is of no real use in the minibuffer since
1616 the handling of this_line_bufpos, etc.,
1617 in redisplay handles the same cases. */
1619 if (XFASTINT (w
->last_modified
) >= MODIFF
1620 && PT
>= startp
&& !current_buffer
->clip_changed
1621 && (just_this_one
|| XFASTINT (w
->width
) == FRAME_WIDTH (f
))
1622 /* If force-mode-line-update was called, really redisplay;
1623 that's how redisplay is forced after e.g. changing
1624 buffer-invisibility-spec. */
1625 && NILP (w
->update_mode_line
)
1626 /* Can't use this case if highlighting a region. */
1627 && !(!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
1628 && NILP (w
->region_showing
)
1629 /* If end pos is out of date, scroll bar and percentage will be wrong */
1630 && INTEGERP (w
->window_end_vpos
)
1631 && XFASTINT (w
->window_end_vpos
) < XFASTINT (w
->height
)
1632 && !EQ (window
, minibuf_window
))
1634 pos
= *compute_motion (startp
, 0, (hscroll
? 1 - hscroll
: 0), 0,
1635 PT
, height
, 0, width
, hscroll
,
1636 pos_tab_offset (w
, startp
), w
);
1638 if (pos
.vpos
< height
)
1640 /* Ok, point is still on frame */
1641 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
1643 /* These variables are supposed to be origin 1 */
1644 FRAME_CURSOR_X (f
) = (XFASTINT (w
->left
)
1645 + minmax (0, pos
.hpos
, width
));
1646 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1648 /* This doesn't do the trick, because if a window to the right of
1649 this one must be redisplayed, this does nothing because there
1650 is nothing in DesiredFrame yet, and then the other window is
1651 redisplayed, making likes that are empty in this window's columns.
1652 if (XFASTINT (w->width) != FRAME_WIDTH (f))
1653 preserve_my_columns (w);
1657 /* Don't bother trying redisplay with same start;
1658 we already know it will lose */
1660 /* If current starting point was originally the beginning of a line
1661 but no longer is, find a new starting point. */
1662 else if (!NILP (w
->start_at_line_beg
)
1664 || FETCH_CHAR (startp
- 1) == '\n'))
1668 else if (just_this_one
&& !MINI_WINDOW_P (w
)
1670 && XFASTINT (w
->last_modified
)
1671 /* or else vmotion on first line won't work. */
1672 && ! NILP (w
->start_at_line_beg
)
1673 && ! EQ (w
->window_end_valid
, Qnil
)
1674 && do_id
&& !current_buffer
->clip_changed
1675 && !blank_end_of_window
1676 && XFASTINT (w
->width
) == FRAME_WIDTH (f
)
1677 /* Can't use this case if highlighting a region. */
1678 && !(!NILP (Vtransient_mark_mode
)
1679 && !NILP (current_buffer
->mark_active
))
1680 /* Don't use try_window_id if newline
1681 doesn't display as the end of a line. */
1682 && !(dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, '\n')))
1683 && NILP (w
->region_showing
)
1684 && EQ (last_arrow_position
, Voverlay_arrow_position
)
1685 && EQ (last_arrow_string
, Voverlay_arrow_string
)
1686 && (tem
= try_window_id (FRAME_SELECTED_WINDOW (f
)))
1689 /* tem > 0 means success. tem == -1 means choose new start.
1690 tem == -2 means try again with same start,
1691 and nothing but whitespace follows the changed stuff.
1692 tem == 0 means try again with same start. */
1696 else if (startp
>= BEGV
&& startp
<= ZV
1698 /* Avoid starting at end of buffer. */
1699 #if 0 /* This change causes trouble for M-! finger & RET.
1700 It will have to be considered later. */
1701 || ! EQ (window
, selected_window
)
1702 /* Don't do the recentering if redisplay
1703 is not for no user action. */
1704 || preserve_echo_area
1707 || (XFASTINT (w
->last_modified
) >= MODIFF
)))
1709 /* Try to redisplay starting at same place as before */
1710 /* If point has not moved off frame, accept the results */
1711 try_window (window
, startp
);
1712 if (cursor_vpos
>= 0)
1714 if (!just_this_one
|| current_buffer
->clip_changed
1715 || beg_unchanged
< startp
)
1716 /* Forget any recorded base line for line number display. */
1717 w
->base_line_number
= Qnil
;
1721 cancel_my_columns (w
);
1724 XSETFASTINT (w
->last_modified
, 0);
1725 /* Redisplay the mode line. Select the buffer properly for that. */
1726 if (!update_mode_line
)
1728 set_buffer_temp (old
);
1729 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1730 update_mode_line
= 1;
1731 w
->update_mode_line
= Qt
;
1734 /* Try to scroll by specified few lines */
1736 if (scroll_step
&& !current_buffer
->clip_changed
1737 && startp
>= BEGV
&& startp
<= ZV
)
1741 pos
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), scroll_step
, w
);
1742 if (pos
.vpos
>= height
)
1746 pos
= *vmotion (startp
, (PT
< startp
? - scroll_step
: scroll_step
), w
);
1748 if (PT
>= pos
.bufpos
)
1750 if (! NILP (Vwindow_scroll_functions
))
1752 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
1753 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1754 make_number (pos
.bufpos
));
1755 pos
.bufpos
= marker_position (w
->start
);
1757 try_window (window
, pos
.bufpos
);
1758 if (cursor_vpos
>= 0)
1760 if (!just_this_one
|| current_buffer
->clip_changed
1761 || beg_unchanged
< startp
)
1762 /* Forget any recorded base line for line number display. */
1763 w
->base_line_number
= Qnil
;
1767 cancel_my_columns (w
);
1772 /* Finally, just choose place to start which centers point */
1775 /* Forget any previously recorded base line for line number display. */
1776 w
->base_line_number
= Qnil
;
1778 pos
= *vmotion (PT
, - (height
/ 2), w
);
1779 /* Set startp here explicitly in case that helps avoid an infinite loop
1780 in case the window-scroll-functions functions get errors. */
1781 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
1782 if (! NILP (Vwindow_scroll_functions
))
1784 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1785 make_number (pos
.bufpos
));
1786 pos
.bufpos
= marker_position (w
->start
);
1788 try_window (window
, pos
.bufpos
);
1790 startp
= marker_position (w
->start
);
1791 w
->start_at_line_beg
1792 = (startp
== BEGV
|| FETCH_CHAR (startp
- 1) == '\n') ? Qt
: Qnil
;
1795 if ((update_mode_line
1796 /* If window not full width, must redo its mode line
1797 if the window to its side is being redone */
1798 || (!just_this_one
&& width
< FRAME_WIDTH (f
) - 1)
1799 || INTEGERP (w
->base_line_pos
)
1800 || (!NILP (w
->column_number_displayed
)
1801 && XFASTINT (w
->column_number_displayed
) != current_column ()))
1802 && height
!= XFASTINT (w
->height
))
1803 display_mode_line (w
);
1804 if (! line_number_displayed
1805 && ! BUFFERP (w
->base_line_pos
))
1807 w
->base_line_pos
= Qnil
;
1808 w
->base_line_number
= Qnil
;
1811 /* When we reach a frame's selected window, redo the frame's menu bar. */
1812 if (update_mode_line
1813 && (FRAME_WINDOW_P (f
)
1815 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1816 FRAME_EXTERNAL_MENU_BAR (f
)
1818 FRAME_MENU_BAR_LINES (f
) > 0
1820 : FRAME_MENU_BAR_LINES (f
) > 0)
1821 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
1822 display_menu_bar (w
);
1825 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
1827 int start
, end
, whole
;
1829 /* Calculate the start and end positions for the current window.
1830 At some point, it would be nice to choose between scrollbars
1831 which reflect the whole buffer size, with special markers
1832 indicating narrowing, and scrollbars which reflect only the
1835 Note that minibuffers sometimes aren't displaying any text. */
1836 if (! MINI_WINDOW_P (w
)
1837 || (w
== XWINDOW (minibuf_window
) && ! echo_area_glyphs
))
1840 start
= marker_position (w
->start
) - BEGV
;
1841 /* I don't think this is guaranteed to be right. For the
1842 moment, we'll pretend it is. */
1843 end
= (Z
- XINT (w
->window_end_pos
)) - BEGV
;
1845 if (end
< start
) end
= start
;
1846 if (whole
< (end
- start
)) whole
= end
- start
;
1849 start
= end
= whole
= 0;
1851 /* Indicate what this scroll bar ought to be displaying now. */
1852 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
1854 /* Note that we actually used the scroll bar attached to this window,
1855 so it shouldn't be deleted at the end of redisplay. */
1856 (*redeem_scroll_bar_hook
) (w
);
1859 BUF_PT (current_buffer
) = opoint
;
1860 if (update_mode_line
)
1861 set_buffer_internal_1 (old
);
1863 set_buffer_temp (old
);
1864 BUF_PT (current_buffer
) = lpoint
;
1867 /* Do full redisplay on one window, starting at position `pos'. */
1870 try_window (window
, pos
)
1874 register struct window
*w
= XWINDOW (window
);
1875 register int height
= window_internal_height (w
);
1876 register int vpos
= XFASTINT (w
->top
);
1877 register int last_text_vpos
= vpos
;
1878 int tab_offset
= pos_tab_offset (w
, pos
);
1879 FRAME_PTR f
= XFRAME (w
->frame
);
1880 int width
= window_internal_width (w
) - 1;
1881 struct position val
;
1883 Fset_marker (w
->start
, make_number (pos
), Qnil
);
1885 overlay_arrow_seen
= 0;
1886 zv_strings_seen
= 0;
1887 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
1889 while (--height
>= 0)
1891 val
= *display_text_line (w
, pos
, vpos
, val
.hpos
, tab_offset
);
1892 tab_offset
+= width
;
1893 /* For the first line displayed, display_text_line
1894 subtracts the prompt width from the tab offset.
1895 But it does not affect the value of our variable tab_offset.
1896 So we do the subtraction again,
1897 for the sake of continuation lines of that first line. */
1898 if (MINI_WINDOW_P (w
) && vpos
== XFASTINT (w
->top
))
1899 tab_offset
-= minibuf_prompt_width
;
1901 if (val
.vpos
) tab_offset
= 0;
1903 if (pos
!= val
.bufpos
)
1906 #ifdef USE_TEXT_PROPERTIES
1907 Lisp_Object invis_prop
;
1908 invis_prop
= Fget_char_property (val
.bufpos
-1, Qinvisible
, window
);
1909 invis
= TEXT_PROP_MEANS_INVISIBLE (invis_prop
);
1913 /* Next line, unless prev line ended in end of buffer with no cr */
1915 && (FETCH_CHAR (val
.bufpos
- 1) != '\n' || invis
));
1920 /* If last line is continued in middle of character,
1921 include the split character in the text considered on the frame */
1922 if (val
.hpos
< (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
1925 /* If bottom just moved off end of frame, change mode line percentage. */
1926 if (XFASTINT (w
->window_end_pos
) == 0
1928 w
->update_mode_line
= Qt
;
1930 /* Say where last char on frame will be, once redisplay is finished. */
1931 XSETFASTINT (w
->window_end_pos
, Z
- pos
);
1932 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
- XFASTINT (w
->top
));
1933 /* But that is not valid info until redisplay finishes. */
1934 w
->window_end_valid
= Qnil
;
1937 /* Try to redisplay when buffer is modified locally,
1938 computing insert/delete line to preserve text outside
1939 the bounds of the changes.
1940 Return 1 if successful, 0 if if cannot tell what to do,
1941 or -1 to tell caller to find a new window start,
1942 or -2 to tell caller to do normal redisplay with same window start. */
1945 try_window_id (window
)
1949 register struct window
*w
= XWINDOW (window
);
1950 register int height
= window_internal_height (w
);
1951 FRAME_PTR f
= XFRAME (w
->frame
);
1952 int top
= XFASTINT (w
->top
);
1953 int start
= marker_position (w
->start
);
1954 int width
= window_internal_width (w
) - 1;
1955 int hscroll
= XINT (w
->hscroll
);
1956 int lmargin
= hscroll
> 0 ? 1 - hscroll
: 0;
1959 register int i
, tem
;
1960 int last_text_vpos
= 0;
1962 int selective
= (INTEGERP (current_buffer
->selective_display
)
1963 ? XINT (current_buffer
->selective_display
)
1964 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
1966 struct position val
, bp
, ep
, xp
, pp
;
1967 int scroll_amount
= 0;
1969 int tab_offset
, epto
, old_tick
;
1971 if (GPT
- BEG
< beg_unchanged
)
1972 beg_unchanged
= GPT
- BEG
;
1973 if (Z
- GPT
< end_unchanged
)
1974 end_unchanged
= Z
- GPT
;
1976 if (beg_unchanged
+ BEG
< start
)
1977 return 0; /* Give up if changes go above top of window */
1979 /* Find position before which nothing is changed. */
1980 bp
= *compute_motion (start
, 0, lmargin
, 0,
1981 min (ZV
, beg_unchanged
+ BEG
), height
, 0,
1982 width
, hscroll
, pos_tab_offset (w
, start
), w
);
1983 if (bp
.vpos
>= height
)
1987 /* All changes are beyond the window end, and point is on the screen.
1988 We don't need to change the text at all.
1989 But we need to update window_end_pos to account for
1990 any change in buffer size. */
1991 bp
= *compute_motion (start
, 0, lmargin
, 0,
1993 width
, hscroll
, pos_tab_offset (w
, start
), w
);
1994 XSETFASTINT (w
->window_end_vpos
, height
);
1995 XSETFASTINT (w
->window_end_pos
, Z
- bp
.bufpos
);
2003 /* Find beginning of that frame line. Must display from there. */
2004 bp
= *vmotion (bp
.bufpos
, 0, w
);
2012 /* If about to start displaying at the beginning of a continuation line,
2013 really start with previous frame line, in case it was not
2014 continued when last redisplayed */
2015 if ((bp
.contin
&& bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0)
2017 /* Likewise if we have to worry about selective display. */
2018 (selective
> 0 && bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0))
2020 bp
= *vmotion (bp
.bufpos
, -1, w
);
2025 if (bp
.contin
&& bp
.hpos
!= lmargin
)
2027 val
.hpos
= bp
.prevhpos
- width
+ lmargin
;
2034 /* Find first visible newline after which no more is changed. */
2035 tem
= find_next_newline (Z
- max (end_unchanged
, Z
- ZV
), 1);
2037 while (tem
< ZV
- 1 && (indented_beyond_p (tem
, selective
)))
2038 tem
= find_next_newline (tem
, 1);
2040 /* Compute the cursor position after that newline. */
2041 ep
= *compute_motion (pos
, vpos
, val
.hpos
, did_motion
, tem
,
2042 height
, - (1 << (BITS_PER_SHORT
- 1)),
2043 width
, hscroll
, pos_tab_offset (w
, bp
.bufpos
), w
);
2045 /* If changes reach past the text available on the frame,
2046 just display rest of frame. */
2047 if (ep
.bufpos
> Z
- XFASTINT (w
->window_end_pos
))
2050 stop_vpos
= ep
.vpos
;
2052 /* If no newline before ep, the line ep is on includes some changes
2053 that must be displayed. Make sure we don't stop before it. */
2054 /* Also, if changes reach all the way until ep.bufpos,
2055 it is possible that something was deleted after the
2056 newline before it, so the following line must be redrawn. */
2057 if (stop_vpos
== ep
.vpos
2058 && (ep
.bufpos
== BEGV
2059 || FETCH_CHAR (ep
.bufpos
- 1) != '\n'
2060 || ep
.bufpos
== Z
- end_unchanged
))
2061 stop_vpos
= ep
.vpos
+ 1;
2064 overlay_arrow_seen
= 0;
2065 zv_strings_seen
= 0;
2067 /* If changes do not reach to bottom of window,
2068 figure out how much to scroll the rest of the window */
2069 if (stop_vpos
< height
)
2071 /* Now determine how far up or down the rest of the window has moved */
2072 epto
= pos_tab_offset (w
, ep
.bufpos
);
2073 xp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2074 Z
- XFASTINT (w
->window_end_pos
),
2075 10000, 0, width
, hscroll
, epto
, w
);
2076 scroll_amount
= xp
.vpos
- XFASTINT (w
->window_end_vpos
);
2078 /* Is everything on frame below the changes whitespace?
2079 If so, no scrolling is really necessary. */
2080 for (i
= ep
.bufpos
; i
< xp
.bufpos
; i
++)
2082 tem
= FETCH_CHAR (i
);
2083 if (tem
!= ' ' && tem
!= '\n' && tem
!= '\t')
2089 XSETFASTINT (w
->window_end_vpos
,
2090 XFASTINT (w
->window_end_vpos
) + scroll_amount
);
2092 /* Before doing any scrolling, verify that point will be on frame. */
2093 if (PT
> ep
.bufpos
&& !(PT
<= xp
.bufpos
&& xp
.bufpos
< height
))
2095 if (PT
<= xp
.bufpos
)
2097 pp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2098 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2099 width
, hscroll
, epto
, w
);
2103 pp
= *compute_motion (xp
.bufpos
, xp
.vpos
, xp
.hpos
, 1,
2104 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2106 pos_tab_offset (w
, xp
.bufpos
), w
);
2108 if (pp
.bufpos
< PT
|| pp
.vpos
== height
)
2110 cursor_vpos
= pp
.vpos
+ top
;
2111 cursor_hpos
= XFASTINT (w
->left
) + minmax (0, pp
.hpos
, width
);
2114 if (stop_vpos
- scroll_amount
>= height
2115 || ep
.bufpos
== xp
.bufpos
)
2117 if (scroll_amount
< 0)
2118 stop_vpos
-= scroll_amount
;
2120 /* In this path, we have altered window_end_vpos
2121 and not left it negative.
2122 We must make sure that, in case display is preempted
2123 before the frame changes to reflect what we do here,
2124 further updates will not come to try_window_id
2125 and assume the frame and window_end_vpos match. */
2126 blank_end_of_window
= 1;
2128 else if (!scroll_amount
)
2130 /* Even if we don't need to scroll, we must adjust the
2131 charstarts of subsequent lines (that we won't redisplay)
2132 according to the amount of text inserted or deleted. */
2133 int oldpos
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2134 int adjust
= ep
.bufpos
- oldpos
;
2135 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1, adjust
);
2137 else if (bp
.bufpos
== Z
- end_unchanged
)
2139 /* If reprinting everything is nearly as fast as scrolling,
2140 don't bother scrolling. Can happen if lines are short. */
2141 if (scroll_cost (f
, bp
.vpos
+ top
- scroll_amount
,
2142 top
+ height
- max (0, scroll_amount
),
2144 > xp
.bufpos
- bp
.bufpos
- 20)
2145 /* Return "try normal display with same window-start."
2146 Too bad we can't prevent further scroll-thinking. */
2148 /* If pure deletion, scroll up as many lines as possible.
2149 In common case of killing a line, this can save the
2150 following line from being overwritten by scrolling
2151 and therefore having to be redrawn. */
2152 tem
= scroll_frame_lines (f
, bp
.vpos
+ top
- scroll_amount
,
2153 top
+ height
- max (0, scroll_amount
),
2154 scroll_amount
, bp
.bufpos
);
2159 /* scroll_frame_lines did not properly adjust subsequent
2160 lines' charstarts in the case where the text of the
2161 screen line at bp.vpos has changed.
2162 (This can happen in a deletion that ends in mid-line.)
2163 To adjust properly, we need to make things consistent
2165 So do a second adjust to make that happen.
2166 Note that stop_vpos >= ep.vpos, so it is sufficient
2167 to update the charstarts for lines at ep.vpos and below. */
2169 = FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2170 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1,
2171 ep
.bufpos
- oldstart
);
2174 else if (scroll_amount
)
2176 /* If reprinting everything is nearly as fast as scrolling,
2177 don't bother scrolling. Can happen if lines are short. */
2178 /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an
2179 overestimate of cost of reprinting, since xp.bufpos
2180 would end up below the bottom of the window. */
2181 if (scroll_cost (f
, ep
.vpos
+ top
- scroll_amount
,
2182 top
+ height
- max (0, scroll_amount
),
2184 > xp
.bufpos
- ep
.bufpos
- 20)
2185 /* Return "try normal display with same window-start."
2186 Too bad we can't prevent further scroll-thinking. */
2188 tem
= scroll_frame_lines (f
, ep
.vpos
+ top
- scroll_amount
,
2189 top
+ height
- max (0, scroll_amount
),
2190 scroll_amount
, ep
.bufpos
);
2191 if (!tem
) stop_vpos
= height
;
2195 /* In any case, do not display past bottom of window */
2196 if (stop_vpos
>= height
)
2202 /* Handle case where pos is before w->start --
2203 can happen if part of line had been clipped and is not clipped now */
2204 if (vpos
== 0 && pos
< marker_position (w
->start
))
2205 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2207 /* Redisplay the lines where the text was changed */
2208 last_text_vpos
= vpos
;
2209 tab_offset
= pos_tab_offset (w
, pos
);
2210 /* If we are starting display in mid-character, correct tab_offset
2211 to account for passing the line that that character really starts in. */
2212 if (val
.hpos
< lmargin
)
2213 tab_offset
+= width
;
2215 while (vpos
< stop_vpos
)
2217 val
= *display_text_line (w
, pos
, top
+ vpos
++, val
.hpos
, tab_offset
);
2218 /* If display_text_line ran a hook and changed some text,
2219 redisplay all the way to bottom of buffer
2220 So that we show the changes. */
2221 if (old_tick
!= MODIFF
)
2223 tab_offset
+= width
;
2224 if (val
.vpos
) tab_offset
= 0;
2225 if (pos
!= val
.bufpos
)
2227 /* Next line, unless prev line ended in end of buffer with no cr */
2228 = vpos
- (val
.vpos
&& FETCH_CHAR (val
.bufpos
- 1) != '\n');
2232 /* There are two cases:
2233 1) we have displayed down to the bottom of the window
2234 2) we have scrolled lines below stop_vpos by scroll_amount */
2238 /* If last line is continued in middle of character,
2239 include the split character in the text considered on the frame */
2240 if (val
.hpos
< lmargin
)
2242 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
);
2243 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2246 /* If scrolling made blank lines at window bottom,
2247 redisplay to fill those lines */
2248 if (scroll_amount
< 0)
2250 /* Don't consider these lines for general-purpose scrolling.
2251 That will save time in the scrolling computation. */
2252 FRAME_SCROLL_BOTTOM_VPOS (f
) = xp
.vpos
;
2257 vpos
= height
+ scroll_amount
;
2258 else if (xp
.contin
&& xp
.hpos
!= lmargin
)
2260 val
.hpos
= xp
.prevhpos
- width
+ lmargin
;
2264 blank_end_of_window
= 1;
2265 tab_offset
= pos_tab_offset (w
, pos
);
2266 /* If we are starting display in mid-character, correct tab_offset
2267 to account for passing the line that that character starts in. */
2268 if (val
.hpos
< lmargin
)
2269 tab_offset
+= width
;
2271 while (vpos
< height
)
2273 val
= *display_text_line (w
, pos
, top
+ vpos
++, val
.hpos
, tab_offset
);
2274 tab_offset
+= width
;
2275 if (val
.vpos
) tab_offset
= 0;
2279 /* Here is a case where display_text_line sets cursor_vpos wrong.
2280 Make it be fixed up, below. */
2286 /* If bottom just moved off end of frame, change mode line percentage. */
2287 if (XFASTINT (w
->window_end_pos
) == 0
2289 w
->update_mode_line
= Qt
;
2291 /* Attempt to adjust end-of-text positions to new bottom line */
2294 delta
= height
- xp
.vpos
;
2296 || (delta
> 0 && xp
.bufpos
<= ZV
)
2297 || (delta
== 0 && xp
.hpos
))
2299 val
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), delta
, w
);
2300 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2301 XSETFASTINT (w
->window_end_vpos
,
2302 XFASTINT (w
->window_end_vpos
) + val
.vpos
);
2306 w
->window_end_valid
= Qnil
;
2308 /* If point was not in a line that was displayed, find it */
2309 if (cursor_vpos
< 0)
2312 val
= *compute_motion (start
, 0, lmargin
, 0, PT
, 10000, 10000,
2313 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2314 /* Admit failure if point is off frame now */
2315 if (val
.vpos
>= height
)
2317 for (vpos
= 0; vpos
< height
; vpos
++)
2318 cancel_line (vpos
+ top
, f
);
2321 cursor_vpos
= val
.vpos
+ top
;
2322 cursor_hpos
= XFASTINT (w
->left
) + minmax (0, val
.hpos
, width
);
2325 FRAME_CURSOR_X (f
) = cursor_hpos
;
2326 FRAME_CURSOR_Y (f
) = cursor_vpos
;
2330 val
= *compute_motion (start
, 0, lmargin
, 0, ZV
,
2331 height
, - (1 << (BITS_PER_SHORT
- 1)),
2332 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2333 if (val
.vpos
!= XFASTINT (w
->window_end_vpos
))
2335 if (XFASTINT (w
->window_end_pos
)
2343 /* Mark a section of BUF as modified, but only for the sake of redisplay.
2344 This is useful for recording changes to overlays.
2346 We increment the buffer's modification timestamp and set the
2347 redisplay caches (windows_or_buffers_changed, beg_unchanged, etc)
2348 as if the region of text between START and END had been modified;
2349 the redisplay code will check this against the windows' timestamps,
2350 and redraw the appropriate area of the buffer.
2352 However, if the buffer is unmodified, we bump the last-save
2353 timestamp as well, so that incrementing the timestamp doesn't fool
2354 Emacs into thinking that the buffer's text has been modified.
2356 Tweaking the timestamps shouldn't hurt the first-modification
2357 timestamps recorded in the undo records; those values aren't
2358 written until just before a real text modification is made, so they
2359 will never catch the timestamp value just before this function gets
2363 redisplay_region (buf
, start
, end
)
2373 start
= end
; end
= temp
;
2376 /* If this is a buffer not in the selected window,
2377 we must do other windows. */
2378 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
2379 windows_or_buffers_changed
= 1;
2380 /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */
2381 else if (buf
!= current_buffer
)
2382 windows_or_buffers_changed
= 1;
2383 /* If multiple windows show this buffer, we must do other windows. */
2384 else if (buffer_shared
> 1)
2385 windows_or_buffers_changed
= 1;
2388 if (unchanged_modified
== MODIFF
)
2390 beg_unchanged
= start
- BEG
;
2391 end_unchanged
= Z
- end
;
2395 if (Z
- end
< end_unchanged
)
2396 end_unchanged
= Z
- end
;
2397 if (start
- BEG
< beg_unchanged
)
2398 beg_unchanged
= start
- BEG
;
2402 /* Increment the buffer's time stamp, but also increment the save
2403 and autosave timestamps, so as not to screw up that timekeeping. */
2404 if (BUF_MODIFF (buf
) == BUF_SAVE_MODIFF (buf
))
2405 BUF_SAVE_MODIFF (buf
)++;
2406 if (BUF_MODIFF (buf
) == buf
->auto_save_modified
)
2407 buf
->auto_save_modified
++;
2409 BUF_MODIFF (buf
) ++;
2413 /* Copy LEN glyphs starting address FROM to the rope TO.
2414 But don't actually copy the parts that would come in before S.
2415 Value is TO, advanced past the copied data.
2416 F is the frame we are displaying in. */
2419 copy_part_of_rope (f
, to
, s
, from
, len
, face
)
2421 register GLYPH
*to
; /* Copy to here. */
2422 register GLYPH
*s
; /* Starting point. */
2423 Lisp_Object
*from
; /* Data to copy. */
2425 int face
; /* Face to apply to glyphs which don't specify one. */
2428 register Lisp_Object
*fp
= from
;
2429 /* These cache the results of the last call to compute_glyph_face. */
2431 int last_merged
= 0;
2434 if (! FRAME_TERMCAP_P (f
))
2437 int glyph
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
2440 if (FAST_GLYPH_FACE (glyph
) == 0)
2441 /* If GLYPH has no face code, use FACE. */
2443 else if (FAST_GLYPH_FACE (glyph
) == last_code
)
2444 /* If it's same as previous glyph, use same result. */
2445 facecode
= last_merged
;
2448 /* Merge this glyph's face and remember the result. */
2449 last_code
= FAST_GLYPH_FACE (glyph
);
2450 last_merged
= facecode
= compute_glyph_face (f
, last_code
, face
);
2454 *to
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), facecode
);
2462 if (to
>= s
) *to
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
2469 /* Correct a glyph by replacing its specified user-level face code
2470 with a displayable computed face code. */
2473 fix_glyph (f
, glyph
, cface
)
2479 if (! FRAME_TERMCAP_P (f
))
2481 if (FAST_GLYPH_FACE (glyph
) != 0)
2482 cface
= compute_glyph_face (f
, FAST_GLYPH_FACE (glyph
), cface
);
2483 glyph
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), cface
);
2489 /* Display one line of window W, starting at position START in W's buffer.
2491 Display starting at horizontal position HPOS, expressed relative to
2492 W's left edge. In situations where the text at START shouldn't
2493 start at the left margin (i.e. when the window is hscrolled, or
2494 we're continuing a line which left off in the midst of a
2495 multi-column character), HPOS should be negative; we throw away
2496 characters up 'til hpos = 0. So, HPOS must take hscrolling into
2499 TABOFFSET is an offset for ostensible hpos, used in tab stop calculations.
2501 Display on position VPOS on the frame. It is origin 0, relative to
2502 the top of the frame, not W.
2504 Returns a STRUCT POSITION giving character to start next line with
2505 and where to display it, including a zero or negative hpos.
2506 The vpos field is not really a vpos; it is 1 unless the line is continued */
2508 struct position val_display_text_line
;
2510 static struct position
*
2511 display_text_line (w
, start
, vpos
, hpos
, taboffset
)
2518 register int pos
= start
;
2522 register unsigned char *p
;
2524 register GLYPH
*leftmargin
;
2525 register GLYPH
*p1prev
;
2526 register GLYPH
*p1start
;
2529 FRAME_PTR f
= XFRAME (w
->frame
);
2530 int tab_width
= XINT (current_buffer
->tab_width
);
2531 int ctl_arrow
= !NILP (current_buffer
->ctl_arrow
);
2532 int width
= window_internal_width (w
) - 1;
2533 struct position val
;
2536 int last_invis_skip
= 0;
2537 Lisp_Object last_invis_prop
;
2538 int hscroll
= XINT (w
->hscroll
);
2539 int truncate
= (hscroll
2540 || (truncate_partial_width_windows
2541 && XFASTINT (w
->width
) < FRAME_WIDTH (f
))
2542 || !NILP (current_buffer
->truncate_lines
));
2544 /* 1 if we should highlight the region. */
2545 int highlight_region
2546 = !NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
);
2547 int region_beg
, region_end
;
2549 int selective
= (INTEGERP (current_buffer
->selective_display
)
2550 ? XINT (current_buffer
->selective_display
)
2551 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2552 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
2553 register struct Lisp_Char_Table
*dp
= window_display_table (w
);
2555 Lisp_Object default_invis_vector
[3];
2556 /* Number of characters of ellipsis to display after an invisible line
2557 if it calls for an ellipsis.
2558 Note that this value can be nonzero regardless of whether
2559 selective display is enabled--you must check that separately. */
2561 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
2562 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->size
2563 : !NILP (current_buffer
->selective_display_ellipses
) ? 3 : 0);
2564 /* This is the sequence of Lisp objects to display
2565 when there are invisible lines. */
2566 Lisp_Object
*invis_vector_contents
2567 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
2568 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->contents
2569 : default_invis_vector
);
2571 GLYPH truncator
= (dp
== 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp
))
2572 ? '$' : XINT (DISP_TRUNC_GLYPH (dp
)));
2573 GLYPH continuer
= (dp
== 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp
))
2574 ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp
)));
2576 /* The next buffer location at which the face should change, due
2577 to overlays or text property changes. */
2578 int next_face_change
;
2580 /* The next location where the `invisible' property changes, or an
2581 overlay starts or ends. */
2584 /* The face we're currently using. */
2585 int current_face
= 0;
2588 XSETFASTINT (default_invis_vector
[2], '.');
2589 default_invis_vector
[0] = default_invis_vector
[1] = default_invis_vector
[2];
2591 hpos
+= XFASTINT (w
->left
);
2592 get_display_line (f
, vpos
, XFASTINT (w
->left
));
2593 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
2595 /* Show where to highlight the region. */
2596 if (highlight_region
&& XMARKER (current_buffer
->mark
)->buffer
!= 0
2597 /* Maybe highlight only in selected window. */
2598 && (highlight_nonselected_windows
2599 || w
== XWINDOW (selected_window
)))
2601 region_beg
= marker_position (current_buffer
->mark
);
2602 if (PT
< region_beg
)
2604 region_end
= region_beg
;
2609 w
->region_showing
= Qt
;
2612 region_beg
= region_end
= -1;
2614 if (MINI_WINDOW_P (w
)
2616 && vpos
== XFASTINT (w
->top
))
2618 if (! NILP (minibuf_prompt
))
2620 minibuf_prompt_width
2621 = (display_string (w
, vpos
, XSTRING (minibuf_prompt
)->data
,
2622 XSTRING (minibuf_prompt
)->size
, hpos
,
2623 /* Display a space if we truncate. */
2626 /* Truncate the prompt a little before the
2627 margin, so user input can at least start
2628 on the first line. */
2629 w
->width
> 10 ? w
->width
- 4 : -1)
2631 hpos
+= minibuf_prompt_width
;
2632 taboffset
-= minibuf_prompt_width
;
2635 minibuf_prompt_width
= 0;
2638 /* If we're hscrolled at all, use compute_motion to skip over any
2639 text off the left edge of the window. compute_motion may know
2640 tricks to do this faster than we can. */
2643 struct position
*left_edge
2644 = compute_motion (pos
, vpos
, hpos
, 0,
2646 width
, hscroll
, taboffset
, w
);
2648 /* Retrieve the buffer position and column provided by
2649 compute_motion. We can't assume that the column will be
2650 zero, because you may have multi-column characters crossing
2653 compute_motion may have moved us past the screen position we
2654 requested, if we hit a multi-column character, or the end of
2655 the line. If so, back up. */
2656 if (left_edge
->vpos
> vpos
2657 || left_edge
->hpos
> 0)
2659 pos
= left_edge
->bufpos
- 1;
2660 hpos
= left_edge
->prevhpos
;
2664 pos
= left_edge
->bufpos
;
2665 hpos
= left_edge
->hpos
;
2669 desired_glyphs
->bufp
[vpos
] = start
;
2670 p1
= desired_glyphs
->glyphs
[vpos
] + hpos
;
2672 charstart
= desired_glyphs
->charstarts
[vpos
] + hpos
;
2673 /* In case we don't ever write anything into it... */
2674 desired_glyphs
->charstarts
[vpos
][XFASTINT (w
->left
)] = -1;
2675 leftmargin
= desired_glyphs
->glyphs
[vpos
] + XFASTINT (w
->left
);
2676 endp
= leftmargin
+ width
;
2678 /* Arrange the overlays nicely for our purposes. Usually, we call
2679 display_text_line on only one line at a time, in which case this
2680 can't really hurt too much, or we call it on lines which appear
2681 one after another in the buffer, in which case all calls to
2682 recenter_overlay_lists but the first will be pretty cheap. */
2683 recenter_overlay_lists (current_buffer
, pos
);
2685 /* Loop generating characters.
2686 Stop at end of buffer, before newline,
2687 if reach or pass continuation column,
2688 or at face change. */
2690 next_face_change
= pos
;
2691 next_boundary
= pos
;
2700 while (pos
== next_boundary
)
2702 Lisp_Object position
, limit
, prop
, ww
;
2704 /* Display the overlay strings here, unless we're at ZV
2705 and have already displayed the appropriate strings
2706 on an earlier line. */
2707 if (pos
< ZV
|| !zv_strings_seen
++)
2711 ovlen
= overlay_strings (pos
, w
, &ovstr
);
2712 for (; ovlen
; ovlen
--, ovstr
++)
2714 if (p1
>= leftmargin
&& p1
< endp
)
2715 *p1
= MAKE_GLYPH (f
, *ovstr
, current_face
);
2720 /* Did we reach point? Record the cursor location. */
2721 if (pos
== PT
&& cursor_vpos
< 0)
2724 cursor_hpos
= p1
- leftmargin
;
2730 XSETFASTINT (position
, pos
);
2731 limit
= Fnext_overlay_change (position
);
2732 #ifdef USE_TEXT_PROPERTIES
2733 /* This is just an estimate to give reasonable
2734 performance; nothing should go wrong if it is too small. */
2735 if (XFASTINT (limit
) > pos
+ 50)
2736 XSETFASTINT (limit
, pos
+ 50);
2737 limit
= Fnext_single_property_change (position
, Qinvisible
,
2738 Fcurrent_buffer (), limit
);
2740 next_boundary
= XFASTINT (limit
);
2741 /* if the `invisible' property is set, we can skip to
2742 the next property change. */
2744 prop
= Fget_char_property (position
, Qinvisible
, ww
);
2745 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
2747 if (pos
< PT
&& next_boundary
>= PT
)
2750 cursor_hpos
= p1
- leftmargin
;
2752 pos
= next_boundary
;
2753 last_invis_skip
= pos
;
2754 last_invis_prop
= prop
;
2758 /* Did we reach point? Record the cursor location. */
2759 if (pos
== PT
&& cursor_vpos
< 0)
2762 cursor_hpos
= p1
- leftmargin
;
2765 /* Did we hit the end of the visible region of the buffer?
2769 /* Update charstarts for the end of this line. */
2770 /* Do nothing if off the left edge or at the right edge. */
2771 if (p1
>= leftmargin
&& p1
+ 1 != endp
)
2773 int *p2x
= &charstart
[(p1
< leftmargin
2781 /* Figure out where (if at all) the
2782 redisplay_end_trigger-hook should run. */
2783 if (MARKERP (w
->redisplay_end_trigger
)
2784 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
2785 e_t_h
= marker_position (w
->redisplay_end_trigger
);
2786 else if (INTEGERP (w
->redisplay_end_trigger
))
2787 e_t_h
= XINT (w
->redisplay_end_trigger
);
2791 /* If we've gone past the place to run a hook,
2793 if (pos
>= e_t_h
&& e_t_h
!= ZV
)
2795 Lisp_Object args
[3];
2797 args
[0] = Qredisplay_end_trigger_functions
;
2798 XSETWINDOW (args
[1], w
);
2799 XSETINT (args
[2], e_t_h
);
2801 /* Since we are *trying* to run these functions,
2802 don't try to run them again, even if they get an error. */
2803 w
->redisplay_end_trigger
= Qnil
;
2804 Frun_hook_with_args (3, args
);
2807 /* Notice if it changed the face of this character. */
2808 next_face_change
= pos
;
2812 /* Did we hit a face change? Figure out what face we should
2813 use now. We also hit this the first time through the
2814 loop, to see what face we should start with. */
2815 if (pos
>= next_face_change
&& (FRAME_WINDOW_P (f
)))
2816 current_face
= compute_char_face (f
, w
, pos
,
2817 region_beg
, region_end
,
2818 &next_face_change
, pos
+ 50, 0);
2821 /* Compute the next place we need to stop
2822 and do something special; set PAUSE. */
2826 if (pos
< next_boundary
&& next_boundary
< pause
)
2827 pause
= next_boundary
;
2828 if (pos
< next_face_change
&& next_face_change
< pause
)
2829 pause
= next_face_change
;
2834 /* Wouldn't you hate to read the next line to someone over
2836 if (pos
< PT
&& PT
< pause
)
2838 if (pos
< GPT
&& GPT
< pause
)
2841 p
= &FETCH_CHAR (pos
);
2850 /* Let a display table override all standard display methods. */
2851 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
2853 p1
= copy_part_of_rope (f
, p1
, leftmargin
,
2854 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
2855 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
2858 else if (c
>= 040 && c
< 0177)
2860 if (p1
>= leftmargin
)
2861 *p1
= MAKE_GLYPH (f
, c
, current_face
);
2867 if (last_invis_skip
== pos
2868 && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop
))
2872 && indented_beyond_p (pos
+ 1, selective
))
2875 pos
= find_next_newline (pos
+ 1, 1);
2876 if (FETCH_CHAR (pos
- 1) == '\n')
2879 if (invis
&& selective_rlen
> 0 && p1
>= leftmargin
)
2881 p1
+= selective_rlen
;
2882 if (p1
- leftmargin
> width
)
2884 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
2885 (p1
- p1prev
), current_face
);
2888 /* Draw the face of the newline character as extending all the
2889 way to the end of the frame line. */
2892 if (p1
< leftmargin
)
2895 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
);
2899 /* Update charstarts for the newline that ended this line. */
2900 /* Do nothing here for a char that's entirely off the left edge
2901 or if it starts at the right edge. */
2902 if (p1
>= leftmargin
&& p1prev
!= endp
)
2904 /* Store the newline's position into charstarts
2905 for the column where the newline starts.
2906 Store -1 for the rest of the glyphs it occupies. */
2907 int *p2x
= &charstart
[(p1prev
< leftmargin
2908 ? leftmargin
: p1prev
)
2910 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
2923 if (p1
>= leftmargin
&& p1
< endp
)
2924 *p1
= MAKE_GLYPH (f
, ' ', current_face
);
2927 while ((p1
- leftmargin
+ taboffset
+ hscroll
- (hscroll
> 0))
2930 else if (c
== Ctl ('M') && selective
== -1)
2932 pos
= find_next_newline (pos
, 1);
2933 if (FETCH_CHAR (pos
- 1) == '\n')
2935 if (selective_rlen
> 0)
2937 p1
+= selective_rlen
;
2938 if (p1
- leftmargin
> width
)
2940 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
2941 (p1
- p1prev
), current_face
);
2944 /* Draw the face of the newline character as extending all the
2945 way to the end of the frame line. */
2948 if (p1
< leftmargin
)
2951 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
);
2955 /* Update charstarts for the ^M that ended this line. */
2956 /* Do nothing here for a char that's entirely off the left edge
2957 or if it starts at the right edge. */
2958 if (p1
>= leftmargin
&& p1prev
!= endp
)
2960 /* Store the newline's position into charstarts
2961 for the column where the newline starts.
2962 Store -1 for the rest of the glyphs it occupies. */
2963 int *p2x
= &charstart
[(p1prev
< leftmargin
2964 ? leftmargin
: p1prev
)
2966 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
2974 else if (c
< 0200 && ctl_arrow
)
2976 if (p1
>= leftmargin
)
2977 *p1
= fix_glyph (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
2978 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
2981 if (p1
>= leftmargin
&& p1
< endp
)
2982 *p1
= MAKE_GLYPH (f
, c
^ 0100, current_face
);
2987 if (p1
>= leftmargin
)
2988 *p1
= fix_glyph (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
2989 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
2992 if (p1
>= leftmargin
&& p1
< endp
)
2993 *p1
= MAKE_GLYPH (f
, (c
>> 6) + '0', current_face
);
2995 if (p1
>= leftmargin
&& p1
< endp
)
2996 *p1
= MAKE_GLYPH (f
, (7 & (c
>> 3)) + '0', current_face
);
2998 if (p1
>= leftmargin
&& p1
< endp
)
2999 *p1
= MAKE_GLYPH (f
, (7 & c
) + '0', current_face
);
3006 /* Update charstarts for the character just output. */
3008 /* Do nothing here for a char that's entirely off the left edge. */
3009 if (p1
>= leftmargin
)
3011 /* Store the char's position into charstarts
3012 for the first glyph occupied by this char.
3013 Store -1 for the rest of the glyphs it occupies. */
3016 int *p2x
= &charstart
[(p1prev
< leftmargin
3017 ? leftmargin
: p1prev
)
3019 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3029 val
.hpos
= - XINT (w
->hscroll
);
3037 /* Store 0 in this charstart line for the positions where
3038 there is no character. But do leave what was recorded
3039 for the character that ended the line. */
3040 /* Add 1 in the endtest to compensate for the fact that ENDP was
3041 made from WIDTH, which is 1 less than the window's actual
3043 i
= p1
- p1start
+ 1;
3044 if (p1
< leftmargin
)
3045 i
+= leftmargin
- p1
;
3046 for (; i
< endp
- p1start
+ 1; i
++)
3049 /* Handle continuation in middle of a character */
3050 /* by backing up over it */
3053 /* Don't back up if we never actually displayed any text.
3054 This occurs when the minibuffer prompt takes up the whole line. */
3057 /* Start the next line with that same character */
3059 /* but at negative hpos, to skip the columns output on this line. */
3060 val
.hpos
+= p1prev
- endp
;
3063 /* Keep in this line everything up to the continuation column. */
3067 /* Finish deciding which character to start the next line on,
3068 and what hpos to start it at.
3069 Also set `lastpos' to the last position which counts as "on this line"
3070 for cursor-positioning. */
3074 if (FETCH_CHAR (pos
) == '\n')
3076 /* If stopped due to a newline, start next line after it */
3078 /* Check again for hidden lines, in case the newline occurred exactly
3079 at the right margin. */
3080 while (pos
< ZV
&& selective
> 0
3081 && indented_beyond_p (pos
, selective
))
3082 pos
= find_next_newline (pos
, 1);
3085 /* Stopped due to right margin of window */
3089 *p1
++ = fix_glyph (f
, truncator
, 0);
3090 /* Truncating => start next line after next newline,
3091 and point is on this line if it is before the newline,
3092 and skip none of first char of next line */
3094 pos
= find_next_newline (pos
, 1);
3095 while (pos
< ZV
&& selective
> 0
3096 && indented_beyond_p (pos
, selective
));
3097 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
3099 lastpos
= pos
- (FETCH_CHAR (pos
- 1) == '\n');
3103 *p1
++ = fix_glyph (f
, continuer
, 0);
3110 /* If point is at eol or in invisible text at eol,
3111 record its frame location now. */
3113 if (start
<= PT
&& PT
<= lastpos
&& cursor_vpos
< 0)
3116 cursor_hpos
= p1
- leftmargin
;
3119 if (cursor_vpos
== vpos
)
3121 if (cursor_hpos
< 0) cursor_hpos
= 0;
3122 if (cursor_hpos
> width
) cursor_hpos
= width
;
3123 cursor_hpos
+= XFASTINT (w
->left
);
3124 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
3126 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (f
)
3127 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
)))
3129 FRAME_CURSOR_Y (f
) = cursor_vpos
;
3130 FRAME_CURSOR_X (f
) = cursor_hpos
;
3133 if (w
== XWINDOW (selected_window
))
3135 /* Line is not continued and did not start
3136 in middle of character */
3137 if ((hpos
- XFASTINT (w
->left
)
3138 == (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
3141 this_line_bufpos
= start
;
3142 this_line_buffer
= current_buffer
;
3143 this_line_vpos
= cursor_vpos
;
3144 this_line_start_hpos
= hpos
;
3145 this_line_endpos
= Z
- lastpos
;
3148 this_line_bufpos
= 0;
3153 /* If hscroll and line not empty, insert truncation-at-left marker */
3154 if (hscroll
&& lastpos
!= start
)
3156 *leftmargin
= fix_glyph (f
, truncator
, 0);
3157 if (p1
<= leftmargin
)
3158 p1
= leftmargin
+ 1;
3161 if (XFASTINT (w
->width
) + XFASTINT (w
->left
) != FRAME_WIDTH (f
))
3164 if (p1
< leftmargin
) p1
= leftmargin
;
3165 while (p1
< endp
) *p1
++ = SPACEGLYPH
;
3167 /* Don't draw vertical bars if we're using scroll bars. They're
3168 covered up by the scroll bars, and it's distracting to see
3169 them when the scroll bar windows are flickering around to be
3171 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3174 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
3178 *p1
++ = (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
3179 ? DISP_BORDER_GLYPH (dp
)
3182 desired_glyphs
->used
[vpos
] = max (desired_glyphs
->used
[vpos
],
3183 p1
- desired_glyphs
->glyphs
[vpos
]);
3184 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
3186 /* If the start of this line is the overlay arrow-position,
3187 then put the arrow string into the display-line. */
3189 if (MARKERP (Voverlay_arrow_position
)
3190 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
3191 && start
== marker_position (Voverlay_arrow_position
)
3192 && STRINGP (Voverlay_arrow_string
)
3193 && ! overlay_arrow_seen
)
3195 unsigned char *p
= XSTRING (Voverlay_arrow_string
)->data
;
3197 int len
= XSTRING (Voverlay_arrow_string
)->size
;
3203 if (!NULL_INTERVAL_P (XSTRING (Voverlay_arrow_string
)->intervals
))
3205 /* If the arrow string has text props, obey them when displaying. */
3206 for (i
= 0; i
< len
; i
++)
3209 Lisp_Object face
, ilisp
;
3212 XSETFASTINT (ilisp
, i
);
3213 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
3214 newface
= compute_glyph_face_1 (f
, face
, 0);
3215 leftmargin
[i
] = FAST_MAKE_GLYPH (c
, newface
);
3219 #endif /* HAVE_FACES */
3221 for (i
= 0; i
< len
; i
++)
3222 leftmargin
[i
] = p
[i
];
3225 /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */
3226 arrow_end
= (leftmargin
- desired_glyphs
->glyphs
[vpos
]) + len
;
3227 if (desired_glyphs
->used
[vpos
] < arrow_end
)
3228 desired_glyphs
->used
[vpos
] = arrow_end
;
3230 overlay_arrow_seen
= 1;
3234 val_display_text_line
= val
;
3235 return &val_display_text_line
;
3238 /* Redisplay the menu bar in the frame for window W. */
3241 display_menu_bar (w
)
3244 Lisp_Object items
, tail
;
3245 register int vpos
= 0;
3246 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
3247 int maxendcol
= FRAME_WIDTH (f
);
3255 #ifdef USE_X_TOOLKIT
3258 #endif /* USE_X_TOOLKIT */
3260 get_display_line (f
, vpos
, 0);
3262 items
= FRAME_MENU_BAR_ITEMS (f
);
3263 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 3)
3265 Lisp_Object pos
, string
;
3266 string
= XVECTOR (items
)->contents
[i
+ 1];
3270 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 2], hpos
);
3272 if (hpos
< maxendcol
)
3273 hpos
= display_string (XWINDOW (FRAME_ROOT_WINDOW (f
)), vpos
,
3274 XSTRING (string
)->data
,
3275 XSTRING (string
)->size
,
3276 hpos
, 0, 0, hpos
, maxendcol
);
3277 /* Put a space between items. */
3278 if (hpos
< maxendcol
)
3280 int hpos1
= hpos
+ 1;
3281 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0,
3282 min (hpos1
, maxendcol
), maxendcol
);
3286 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
3287 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
3289 /* Fill out the line with spaces. */
3290 if (maxendcol
> hpos
)
3291 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0, maxendcol
, maxendcol
);
3293 /* Clear the rest of the lines allocated to the menu bar. */
3295 while (vpos
< FRAME_MENU_BAR_LINES (f
))
3296 get_display_line (f
, vpos
++, 0);
3299 /* Display the mode line for window w */
3302 display_mode_line (w
)
3305 register int vpos
= XFASTINT (w
->height
) + XFASTINT (w
->top
) - 1;
3306 register int left
= XFASTINT (w
->left
);
3307 register int right
= XFASTINT (w
->width
) + left
;
3308 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
3310 line_number_displayed
= 0;
3311 w
->column_number_displayed
= Qnil
;
3313 get_display_line (f
, vpos
, left
);
3315 /* Temporarily make frame F's kboard the current kboard
3316 so that kboard-local variables in the mode_line_format
3317 will get the right values. */
3318 push_frame_kboard (f
);
3320 display_mode_element (w
, vpos
, left
, 0, right
, right
,
3321 current_buffer
->mode_line_format
);
3323 pop_frame_kboard ();
3325 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
3327 /* Make the mode line inverse video if the entire line
3328 is made of mode lines.
3329 I.e. if this window is full width,
3330 or if it is the child of a full width window
3331 (which implies that that window is split side-by-side
3332 and the rest of this line is mode lines of the sibling windows). */
3333 if (XFASTINT (w
->width
) == FRAME_WIDTH (f
)
3334 || XFASTINT (XWINDOW (w
->parent
)->width
) == FRAME_WIDTH (f
))
3335 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
3337 else if (! FRAME_TERMCAP_P (f
) && mode_line_inverse_video
)
3339 /* For a partial width window, explicitly set face of each glyph. */
3341 GLYPH
*ptr
= FRAME_DESIRED_GLYPHS (f
)->glyphs
[vpos
];
3342 for (i
= left
; i
< right
; ++i
)
3343 ptr
[i
] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr
[i
]), 1);
3348 /* Contribute ELT to the mode line for window W.
3349 How it translates into text depends on its data type.
3351 VPOS is the position of the mode line being displayed.
3353 HPOS is the position (absolute on frame) where this element's text
3354 should start. The output is truncated automatically at the right
3357 DEPTH is the depth in recursion. It is used to prevent
3358 infinite recursion here.
3360 MINENDCOL is the hpos before which the element may not end.
3361 The element is padded at the right with spaces if nec
3362 to reach this column.
3364 MAXENDCOL is the hpos past which this element may not extend.
3365 If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority.
3366 (This is necessary to make nested padding and truncation work.)
3368 Returns the hpos of the end of the text generated by ELT.
3369 The next element will receive that value as its HPOS arg,
3370 so as to concatenate the elements. */
3373 display_mode_element (w
, vpos
, hpos
, depth
, minendcol
, maxendcol
, elt
)
3375 register int vpos
, hpos
;
3378 register int maxendcol
;
3379 register Lisp_Object elt
;
3387 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
3391 /* A string: output it and check for %-constructs within it. */
3392 register unsigned char c
;
3393 register unsigned char *this = XSTRING (elt
)->data
;
3395 while (hpos
< maxendcol
&& *this)
3397 unsigned char *last
= this;
3398 while ((c
= *this++) != '\0' && c
!= '%')
3400 if (this - 1 != last
)
3402 register int lim
= --this - last
+ hpos
;
3403 if (frame_title_ptr
)
3404 hpos
= store_frame_title (last
, hpos
, min (lim
, maxendcol
));
3406 hpos
= display_string (w
, vpos
, last
, -1, hpos
, 0, 1,
3407 hpos
, min (lim
, maxendcol
));
3411 register int minendcol
;
3412 register int spec_width
= 0;
3414 /* We can't allow -ve args due to the "%-" construct */
3415 /* Argument specifies minwidth but not maxwidth
3416 (maxwidth can be specified by
3417 (<negative-number> . <stuff>) mode-line elements) */
3419 while ((c
= *this++) >= '0' && c
<= '9')
3421 spec_width
= spec_width
* 10 + (c
- '0');
3424 minendcol
= hpos
+ spec_width
;
3425 if (minendcol
> maxendcol
)
3427 spec_width
= maxendcol
- hpos
;
3428 minendcol
= maxendcol
;
3432 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
3433 spec_width
, maxendcol
,
3434 Vglobal_mode_string
);
3437 char *spec
= decode_mode_spec (w
, c
, spec_width
,
3439 if (frame_title_ptr
)
3440 hpos
= store_frame_title (spec
, minendcol
, maxendcol
);
3442 hpos
= display_string (w
, vpos
, spec
, -1,
3444 minendcol
, maxendcol
);
3452 /* A symbol: process the value of the symbol recursively
3453 as if it appeared here directly. Avoid error if symbol void.
3454 Special case: if value of symbol is a string, output the string
3457 register Lisp_Object tem
;
3458 tem
= Fboundp (elt
);
3461 tem
= Fsymbol_value (elt
);
3462 /* If value is a string, output that string literally:
3463 don't check for % within it. */
3466 if (frame_title_ptr
)
3467 hpos
= store_frame_title (XSTRING (tem
)->data
,
3468 minendcol
, maxendcol
);
3470 hpos
= display_string (w
, vpos
, XSTRING (tem
)->data
,
3471 XSTRING (tem
)->size
,
3472 hpos
, 0, 1, minendcol
, maxendcol
);
3474 /* Give up right away for nil or t. */
3475 else if (!EQ (tem
, elt
))
3476 { elt
= tem
; goto tail_recurse
; }
3483 register Lisp_Object car
, tem
;
3485 /* A cons cell: three distinct cases.
3486 If first element is a string or a cons, process all the elements
3487 and effectively concatenate them.
3488 If first element is a negative number, truncate displaying cdr to
3489 at most that many characters. If positive, pad (with spaces)
3490 to at least that many characters.
3491 If first element is a symbol, process the cadr or caddr recursively
3492 according to whether the symbol's value is non-nil or nil. */
3493 car
= XCONS (elt
)->car
;
3496 tem
= Fboundp (car
);
3497 elt
= XCONS (elt
)->cdr
;
3500 /* elt is now the cdr, and we know it is a cons cell.
3501 Use its car if CAR has a non-nil value. */
3504 tem
= Fsymbol_value (car
);
3506 { elt
= XCONS (elt
)->car
; goto tail_recurse
; }
3508 /* Symbol's value is nil (or symbol is unbound)
3509 Get the cddr of the original list
3510 and if possible find the caddr and use that. */
3511 elt
= XCONS (elt
)->cdr
;
3514 else if (!CONSP (elt
))
3516 elt
= XCONS (elt
)->car
;
3519 else if (INTEGERP (car
))
3521 register int lim
= XINT (car
);
3522 elt
= XCONS (elt
)->cdr
;
3524 /* Negative int means reduce maximum width.
3525 DO NOT change MINENDCOL here!
3526 (20 -10 . foo) should truncate foo to 10 col
3527 and then pad to 20. */
3528 maxendcol
= min (maxendcol
, hpos
- lim
);
3531 /* Padding specified. Don't let it be more than
3534 if (lim
> maxendcol
)
3536 /* If that's more padding than already wanted, queue it.
3537 But don't reduce padding already specified even if
3538 that is beyond the current truncation point. */
3539 if (lim
> minendcol
)
3544 else if (STRINGP (car
) || CONSP (car
))
3546 register int limit
= 50;
3547 /* LIMIT is to protect against circular lists. */
3548 while (CONSP (elt
) && --limit
> 0
3549 && hpos
< maxendcol
)
3551 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
3554 elt
= XCONS (elt
)->cdr
;
3562 if (frame_title_ptr
)
3563 hpos
= store_frame_title ("*invalid*", minendcol
, maxendcol
);
3565 hpos
= display_string (w
, vpos
, "*invalid*", -1, hpos
, 0, 1,
3566 minendcol
, maxendcol
);
3570 if (minendcol
> hpos
)
3571 if (frame_title_ptr
)
3572 hpos
= store_frame_title ("", minendcol
, maxendcol
);
3574 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 1, minendcol
, maxendcol
);
3578 /* Write a null-terminated, right justified decimal representation of
3579 the positive integer D to BUF using a minimal field width WIDTH. */
3582 pint2str (buf
, width
, d
)
3587 register char *p
= buf
;
3594 *p
++ = d
% 10 + '0';
3597 for (width
-= (int) (p
- buf
); width
> 0; --width
) *p
++ = ' ';
3607 /* Return a string for the output of a mode line %-spec for window W,
3608 generated by character C. SPEC_WIDTH is the field width when
3609 padding to the left (%c, %l). The value returned from this
3610 function will later be truncated to width MAXWIDTH. */
3612 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
3615 decode_mode_spec (w
, c
, spec_width
, maxwidth
)
3618 register int spec_width
;
3619 register int maxwidth
;
3622 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
3623 char *decode_mode_spec_buf
= (char *) FRAME_TEMP_GLYPHS (f
)->total_contents
;
3624 struct buffer
*b
= XBUFFER (w
->buffer
);
3627 if (maxwidth
> FRAME_WIDTH (f
))
3628 maxwidth
= FRAME_WIDTH (f
);
3633 if (!NILP (b
->read_only
))
3635 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
3640 /* This differs from %* only for a modified read-only buffer. */
3641 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
3643 if (!NILP (b
->read_only
))
3648 /* This differs from %* in ignoring read-only-ness. */
3649 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
3661 if (command_loop_level
> 5)
3663 p
= decode_mode_spec_buf
;
3664 for (i
= 0; i
< command_loop_level
; i
++)
3667 return decode_mode_spec_buf
;
3675 if (command_loop_level
> 5)
3677 p
= decode_mode_spec_buf
;
3678 for (i
= 0; i
< command_loop_level
; i
++)
3681 return decode_mode_spec_buf
;
3689 if (maxwidth
< sizeof (lots_of_dashes
))
3690 return lots_of_dashes
;
3693 for (p
= decode_mode_spec_buf
, i
= maxwidth
; i
> 0; i
--)
3697 return decode_mode_spec_buf
;
3703 if (maxwidth
>= 3 && XSTRING (obj
)->size
> maxwidth
)
3705 bcopy (XSTRING (obj
)->data
, decode_mode_spec_buf
, maxwidth
- 1);
3706 decode_mode_spec_buf
[maxwidth
- 1] = '\\';
3707 decode_mode_spec_buf
[maxwidth
] = '\0';
3708 return decode_mode_spec_buf
;
3715 int col
= current_column ();
3716 XSETFASTINT (w
->column_number_displayed
, col
);
3717 pint2str (decode_mode_spec_buf
, spec_width
, col
);
3718 return decode_mode_spec_buf
;
3722 /* %F displays the frame name. */
3724 if (!NILP (f
->title
))
3725 return (char *) XSTRING (f
->title
)->data
;
3726 if (f
->explicit_name
|| FRAME_TERMCAP_P (f
))
3727 return (char *) XSTRING (f
->name
)->data
;
3736 else if (STRINGP (obj
) && XSTRING (obj
)->size
> maxwidth
)
3738 bcopy ("...", decode_mode_spec_buf
, 3);
3739 bcopy (XSTRING (obj
)->data
+ XSTRING (obj
)->size
- maxwidth
+ 3,
3740 decode_mode_spec_buf
+ 3, maxwidth
- 3);
3741 return decode_mode_spec_buf
;
3748 int startpos
= marker_position (w
->start
);
3749 int line
, linepos
, topline
;
3752 int height
= XFASTINT (w
->height
);
3754 /* If we decided that this buffer isn't suitable for line numbers,
3755 don't forget that too fast. */
3756 if (EQ (w
->base_line_pos
, w
->buffer
))
3759 /* If the buffer is very big, don't waste time. */
3760 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
3762 w
->base_line_pos
= Qnil
;
3763 w
->base_line_number
= Qnil
;
3767 if (!NILP (w
->base_line_number
)
3768 && !NILP (w
->base_line_pos
)
3769 && XFASTINT (w
->base_line_pos
) <= marker_position (w
->start
))
3771 line
= XFASTINT (w
->base_line_number
);
3772 linepos
= XFASTINT (w
->base_line_pos
);
3777 linepos
= BUF_BEGV (b
);
3780 /* Count lines from base line to window start position. */
3781 nlines
= display_count_lines (linepos
, startpos
, startpos
, &junk
);
3783 topline
= nlines
+ line
;
3785 /* Determine a new base line, if the old one is too close
3786 or too far away, or if we did not have one.
3787 "Too close" means it's plausible a scroll-down would
3789 if (startpos
== BUF_BEGV (b
))
3791 XSETFASTINT (w
->base_line_number
, topline
);
3792 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
3794 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
3795 || linepos
== BUF_BEGV (b
))
3797 int limit
= BUF_BEGV (b
);
3799 int distance
= (height
* 2 + 30) * 200;
3801 if (startpos
- distance
> limit
)
3802 limit
= startpos
- distance
;
3804 nlines
= display_count_lines (startpos
, limit
,
3807 /* If we couldn't find the lines we wanted within
3809 give up on line numbers for this window. */
3810 if (position
== startpos
- distance
)
3812 w
->base_line_pos
= w
->buffer
;
3813 w
->base_line_number
= Qnil
;
3817 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
3818 XSETFASTINT (w
->base_line_pos
, position
);
3821 /* Now count lines from the start pos to point. */
3822 nlines
= display_count_lines (startpos
, PT
, PT
, &junk
);
3824 /* Record that we did display the line number. */
3825 line_number_displayed
= 1;
3827 /* Make the string to show. */
3828 pint2str (decode_mode_spec_buf
, spec_width
, topline
+ nlines
);
3829 return decode_mode_spec_buf
;
3832 char* p
= decode_mode_spec_buf
;
3833 for (spec_width
-= 2; spec_width
> 0; --spec_width
) *p
++ = ' ';
3835 return decode_mode_spec_buf
;
3845 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
3851 int pos
= marker_position (w
->start
);
3852 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
3854 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
3856 if (pos
<= BUF_BEGV (b
))
3861 else if (pos
<= BUF_BEGV (b
))
3865 if (total
> 1000000)
3866 /* Do it differently for a large value, to avoid overflow. */
3867 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
3869 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
3870 /* We can't normally display a 3-digit number,
3871 so get us a 2-digit number that is close. */
3874 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
3875 return decode_mode_spec_buf
;
3879 /* Display percentage of size above the bottom of the screen. */
3882 int toppos
= marker_position (w
->start
);
3883 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
3884 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
3886 if (botpos
>= BUF_ZV (b
))
3888 if (toppos
<= BUF_BEGV (b
))
3895 if (total
> 1000000)
3896 /* Do it differently for a large value, to avoid overflow. */
3897 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
3899 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
3900 /* We can't normally display a 3-digit number,
3901 so get us a 2-digit number that is close. */
3904 if (toppos
<= BUF_BEGV (b
))
3905 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
3907 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
3908 return decode_mode_spec_buf
;
3913 /* status of process */
3914 obj
= Fget_buffer_process (w
->buffer
);
3916 return "no process";
3918 obj
= Fsymbol_name (Fprocess_status (obj
));
3922 case 't': /* indicate TEXT or BINARY */
3923 #ifdef MODE_LINE_BINARY_TEXT
3924 return MODE_LINE_BINARY_TEXT (b
);
3931 return (char *) XSTRING (obj
)->data
;
3936 /* Search for COUNT instances of a line boundary, which means either a
3937 newline or (if selective display enabled) a carriage return.
3938 Start at START. If COUNT is negative, search backwards.
3940 If we find COUNT instances, set *SHORTAGE to zero, and return the
3941 position after the COUNTth match. Note that for reverse motion
3942 this is not the same as the usual convention for Emacs motion commands.
3944 If we don't find COUNT instances before reaching the end of the
3945 buffer (or the beginning, if scanning backwards), set *SHORTAGE to
3946 the number of line boundaries left unfound, and return the end of the
3947 buffer we bumped up against. */
3950 display_scan_buffer (start
, count
, shortage
)
3951 int *shortage
, start
;
3954 int limit
= ((count
> 0) ? ZV
- 1 : BEGV
);
3955 int direction
= ((count
> 0) ? 1 : -1);
3957 register unsigned char *cursor
;
3958 unsigned char *base
;
3960 register int ceiling
;
3961 register unsigned char *ceiling_addr
;
3963 /* If we are not in selective display mode,
3964 check only for newlines. */
3965 if (! (!NILP (current_buffer
->selective_display
)
3966 && !INTEGERP (current_buffer
->selective_display
)))
3967 return scan_buffer ('\n', start
, 0, count
, shortage
, 0);
3969 /* The code that follows is like scan_buffer
3970 but checks for either newline or carriage return. */
3976 while (start
!= limit
+ 1)
3978 ceiling
= BUFFER_CEILING_OF (start
);
3979 ceiling
= min (limit
, ceiling
);
3980 ceiling_addr
= &FETCH_CHAR (ceiling
) + 1;
3981 base
= (cursor
= &FETCH_CHAR (start
));
3984 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
3986 if (cursor
!= ceiling_addr
)
3991 return (start
+ cursor
- base
+ 1);
3994 if (++cursor
== ceiling_addr
)
4000 start
+= cursor
- base
;
4004 start
--; /* first character we scan */
4005 while (start
> limit
- 1)
4006 { /* we WILL scan under start */
4007 ceiling
= BUFFER_FLOOR_OF (start
);
4008 ceiling
= max (limit
, ceiling
);
4009 ceiling_addr
= &FETCH_CHAR (ceiling
) - 1;
4010 base
= (cursor
= &FETCH_CHAR (start
));
4014 while (--cursor
!= ceiling_addr
4015 && *cursor
!= '\n' && *cursor
!= 015)
4017 if (cursor
!= ceiling_addr
)
4022 return (start
+ cursor
- base
+ 1);
4028 start
+= cursor
- base
;
4033 *shortage
= count
* direction
;
4034 return (start
+ ((direction
== 1 ? 0 : 1)));
4037 /* Count up to N lines starting from FROM.
4038 But don't go beyond LIMIT.
4039 Return the number of lines thus found (always positive).
4040 Store the position after what was found into *POS_PTR. */
4043 display_count_lines (from
, limit
, n
, pos_ptr
)
4056 *pos_ptr
= display_scan_buffer (from
, n
, &shortage
);
4062 /* When scanning backwards, scan_buffer stops *after* the last newline
4063 it finds, but does count it. Compensate for that. */
4064 return - n
- shortage
- (*pos_ptr
!= limit
);
4065 return n
- shortage
;
4068 /* Display STRING on one line of window W, starting at HPOS.
4069 Display at position VPOS. Caller should have done get_display_line.
4070 If VPOS == -1, display it as the current frame's title.
4071 LENGTH is the length of STRING, or -1 meaning STRING is null-terminated.
4073 TRUNCATE is GLYPH to display at end if truncated. Zero for none.
4075 MINCOL is the first column ok to end at. (Pad with spaces to this col.)
4076 MAXCOL is the last column ok to end at. Truncate here.
4077 -1 for MINCOL or MAXCOL means no explicit minimum or maximum.
4078 Both count from the left edge of the frame, as does HPOS.
4079 The right edge of W is an implicit maximum.
4080 If TRUNCATE is nonzero, the implicit maximum is one column before the edge.
4082 OBEY_WINDOW_WIDTH says to put spaces or vertical bars
4083 at the place where the current window ends in this line
4084 and not display anything beyond there. Otherwise, only MAXCOL
4085 controls where to stop output.
4087 Returns ending hpos. */
4090 display_string (w
, vpos
, string
, length
, hpos
, truncate
,
4091 obey_window_width
, mincol
, maxcol
)
4093 unsigned char *string
;
4097 int obey_window_width
;
4103 int hscroll
= XINT (w
->hscroll
);
4104 int tab_width
= XINT (XBUFFER (w
->buffer
)->tab_width
);
4105 register GLYPH
*start
;
4106 register GLYPH
*end
;
4107 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4108 struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
4109 GLYPH
*p1start
= desired_glyphs
->glyphs
[vpos
] + hpos
;
4110 int window_width
= XFASTINT (w
->width
);
4112 /* Use the standard display table, not the window's display table.
4113 We don't want the mode line in rot13. */
4114 register struct Lisp_Char_Table
*dp
= 0;
4117 if (DISP_TABLE_P (Vstandard_display_table
))
4118 dp
= XCHAR_TABLE (Vstandard_display_table
);
4120 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
4123 start
= desired_glyphs
->glyphs
[vpos
] + XFASTINT (w
->left
);
4125 if (obey_window_width
)
4127 end
= start
+ window_width
- (truncate
!= 0);
4129 if ((window_width
+ XFASTINT (w
->left
)) != FRAME_WIDTH (f
))
4131 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
4135 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
4143 if (! obey_window_width
4144 || (maxcol
>= 0 && end
- desired_glyphs
->glyphs
[vpos
] > maxcol
))
4145 end
= desired_glyphs
->glyphs
[vpos
] + maxcol
;
4147 /* Store 0 in charstart for these columns. */
4148 for (i
= (hpos
>= 0 ? hpos
: 0); i
< end
- p1start
+ hpos
; i
++)
4149 desired_glyphs
->charstarts
[vpos
][i
] = 0;
4151 if (maxcol
>= 0 && mincol
> maxcol
)
4154 /* We set truncated to 1 if we get stopped by trying to pass END
4155 (that is, trying to pass MAXCOL.) */
4162 /* Specified length. */
4165 /* Unspecified length (null-terminated string). */
4175 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
4177 p1
= copy_part_of_rope (f
, p1
, start
,
4178 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
4179 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
4182 else if (c
>= 040 && c
< 0177)
4192 if (p1
>= start
&& p1
< end
)
4196 while ((p1
- start
+ hscroll
- (hscroll
> 0)) % tab_width
);
4198 else if (c
< 0200 && ! NILP (buffer_defaults
.ctl_arrow
))
4201 *p1
= fix_glyph (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
4202 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
4205 if (p1
>= start
&& p1
< end
)
4212 *p1
= fix_glyph (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
4213 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
4216 if (p1
>= start
&& p1
< end
)
4217 *p1
= (c
>> 6) + '0';
4219 if (p1
>= start
&& p1
< end
)
4220 *p1
= (7 & (c
>> 3)) + '0';
4222 if (p1
>= start
&& p1
< end
)
4223 *p1
= (7 & c
) + '0';
4231 if (truncate
) *p1
++ = fix_glyph (f
, truncate
, 0);
4233 else if (mincol
>= 0)
4235 end
= desired_glyphs
->glyphs
[vpos
] + mincol
;
4241 register int len
= p1
- desired_glyphs
->glyphs
[vpos
];
4243 if (len
> desired_glyphs
->used
[vpos
])
4244 desired_glyphs
->used
[vpos
] = len
;
4245 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
4251 /* This is like a combination of memq and assq.
4252 Return 1 if PROPVAL appears as an element of LIST
4253 or as the car of an element of LIST.
4254 If PROPVAL is a list, compare each element against LIST
4255 in that way, and return 1 if any element of PROPVAL is found in LIST.
4257 This function cannot quit. */
4260 invisible_p (propval
, list
)
4261 register Lisp_Object propval
;
4264 register Lisp_Object tail
, proptail
;
4265 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4267 register Lisp_Object tem
;
4268 tem
= XCONS (tail
)->car
;
4269 if (EQ (propval
, tem
))
4271 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
4274 if (CONSP (propval
))
4275 for (proptail
= propval
; CONSP (proptail
);
4276 proptail
= XCONS (proptail
)->cdr
)
4278 Lisp_Object propelt
;
4279 propelt
= XCONS (proptail
)->car
;
4280 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4282 register Lisp_Object tem
;
4283 tem
= XCONS (tail
)->car
;
4284 if (EQ (propelt
, tem
))
4286 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
4293 /* Return 1 if PROPVAL appears as the car of an element of LIST
4294 and the cdr of that element is non-nil.
4295 If PROPVAL is a list, check each element of PROPVAL in that way,
4296 and the first time some element is found,
4297 return 1 if the cdr of that element is non-nil.
4299 This function cannot quit. */
4302 invisible_ellipsis_p (propval
, list
)
4303 register Lisp_Object propval
;
4306 register Lisp_Object tail
, proptail
;
4307 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4309 register Lisp_Object tem
;
4310 tem
= XCONS (tail
)->car
;
4311 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
4312 return ! NILP (XCONS (tem
)->cdr
);
4314 if (CONSP (propval
))
4315 for (proptail
= propval
; CONSP (proptail
);
4316 proptail
= XCONS (proptail
)->cdr
)
4318 Lisp_Object propelt
;
4319 propelt
= XCONS (proptail
)->car
;
4320 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4322 register Lisp_Object tem
;
4323 tem
= XCONS (tail
)->car
;
4324 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
4325 return ! NILP (XCONS (tem
)->cdr
);
4334 staticpro (&Qmenu_bar_update_hook
);
4335 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
4337 staticpro (&Qoverriding_terminal_local_map
);
4338 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
4340 staticpro (&Qoverriding_local_map
);
4341 Qoverriding_local_map
= intern ("overriding-local-map");
4343 staticpro (&Qwindow_scroll_functions
);
4344 Qwindow_scroll_functions
= intern ("window-scroll-functions");
4346 staticpro (&Qredisplay_end_trigger_functions
);
4347 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
4349 staticpro (&last_arrow_position
);
4350 staticpro (&last_arrow_string
);
4351 last_arrow_position
= Qnil
;
4352 last_arrow_string
= Qnil
;
4354 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
4355 "String (or mode line construct) included (normally) in `mode-line-format'.");
4356 Vglobal_mode_string
= Qnil
;
4358 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
4359 "Marker for where to display an arrow on top of the buffer text.\n\
4360 This must be the beginning of a line in order to work.\n\
4361 See also `overlay-arrow-string'.");
4362 Voverlay_arrow_position
= Qnil
;
4364 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
4365 "String to display as an arrow. See also `overlay-arrow-position'.");
4366 Voverlay_arrow_string
= Qnil
;
4368 DEFVAR_INT ("scroll-step", &scroll_step
,
4369 "*The number of lines to try scrolling a window by when point moves out.\n\
4370 If that fails to bring point back on frame, point is centered instead.\n\
4371 If this is zero, point is always centered after it moves off frame.");
4373 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
4375 DEFVAR_BOOL ("truncate-partial-width-windows",
4376 &truncate_partial_width_windows
,
4377 "*Non-nil means truncate lines in all windows less than full frame wide.");
4378 truncate_partial_width_windows
= 1;
4380 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
4381 "*Non-nil means use inverse video for the mode line.");
4382 mode_line_inverse_video
= 1;
4384 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
4385 "*Maximum buffer size for which line number should be displayed.");
4386 line_number_display_limit
= 1000000;
4388 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
4389 "*Non-nil means highlight region even in nonselected windows.");
4390 highlight_nonselected_windows
= 1;
4392 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
4393 "Non-nil if more than one frame is visible on this display.\n\
4394 Minibuffer-only frames don't count, but iconified frames do.\n\
4395 This variable is not guaranteed to be accurate except while processing\n\
4396 `frame-title-format' and `icon-title-format'.");
4398 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
4399 "Template for displaying the titlebar of visible frames.\n\
4400 \(Assuming the window manager supports this feature.)\n\
4401 This variable has the same structure as `mode-line-format' (which see),\n\
4402 and is used only on frames for which no explicit name has been set\n\
4403 \(see `modify-frame-parameters').");
4404 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
4405 "Template for displaying the titlebar of an iconified frame.\n\
4406 \(Assuming the window manager supports this feature.)\n\
4407 This variable has the same structure as `mode-line-format' (which see),\n\
4408 and is used only on frames for which no explicit name has been set\n\
4409 \(see `modify-frame-parameters').");
4411 = Vframe_title_format
4412 = Fcons (intern ("multiple-frames"),
4413 Fcons (build_string ("%b"),
4414 Fcons (Fcons (build_string (""),
4415 Fcons (intern ("invocation-name"),
4416 Fcons (build_string ("@"),
4417 Fcons (intern ("system-name"),
4421 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
4422 "Maximum number of lines to keep in the message log buffer.\n\
4423 If nil, disable message logging. If t, log messages but don't truncate\n\
4424 the buffer when it becomes large.");
4425 XSETFASTINT (Vmessage_log_max
, 50);
4427 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
4428 "Functions called before redisplay, if window sizes have changed.\n\
4429 The value should be a list of functions that take one argument.\n\
4430 Just before redisplay, for each frame, if any of its windows have changed\n\
4431 size since the last redisplay, or have been split or deleted,\n\
4432 all the functions in the list are called, with the frame as argument.");
4433 Vwindow_size_change_functions
= Qnil
;
4435 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
4436 "List of Functions to call before redisplaying a window with scrolling.\n\
4437 Each function is called with two arguments, the window\n\
4438 and its new display-start position. Note that the value of `window-end'\n\
4439 is not valid when these functions are called.");
4440 Vwindow_scroll_functions
= Qnil
;
4443 /* initialize the window system */
4446 Lisp_Object root_window
;
4447 #ifndef COMPILER_REGISTER_BUG
4449 #endif /* COMPILER_REGISTER_BUG */
4450 struct window
*mini_w
;
4452 this_line_bufpos
= 0;
4454 mini_w
= XWINDOW (minibuf_window
);
4455 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
4457 echo_area_glyphs
= 0;
4458 previous_echo_glyphs
= 0;
4460 if (!noninteractive
)
4462 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
4463 XSETFASTINT (XWINDOW (root_window
)->top
, 0);
4464 set_window_height (root_window
, FRAME_HEIGHT (f
) - 1, 0);
4465 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
4466 set_window_height (minibuf_window
, 1, 0);
4468 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
4469 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));