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"
37 #include "termhooks.h"
38 #include "intervals.h"
43 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
44 extern void set_frame_menubar ();
45 extern int pending_menu_activation
;
48 extern int interrupt_input
;
49 extern int command_loop_level
;
51 extern int minibuffer_auto_raise
;
53 extern Lisp_Object Qface
;
55 extern Lisp_Object Voverriding_local_map
;
56 extern Lisp_Object Voverriding_local_map_menu_flag
;
58 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
59 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
60 Lisp_Object Qredisplay_end_trigger_functions
;
62 /* Nonzero means print newline to stdout before next minibuffer message. */
64 int noninteractive_need_newline
;
66 /* Nonzero means print newline to message log before next message. */
68 static int message_log_need_newline
;
70 #define min(a, b) ((a) < (b) ? (a) : (b))
71 #define max(a, b) ((a) > (b) ? (a) : (b))
72 #define minmax(floor, val, ceil) \
73 ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val))
75 /* The buffer position of the first character appearing
76 entirely or partially on the current frame line.
77 Or zero, which disables the optimization for the current frame line. */
78 static int this_line_bufpos
;
80 /* Number of characters past the end of this line,
81 including the terminating newline */
82 static int this_line_endpos
;
84 /* The vertical position of this frame line. */
85 static int this_line_vpos
;
87 /* Hpos value for start of display on this frame line.
88 Usually zero, but negative if first character really began
90 static int this_line_start_hpos
;
92 /* Buffer that this_line variables are describing. */
93 static struct buffer
*this_line_buffer
;
95 /* Value of echo_area_glyphs when it was last acted on.
96 If this is nonzero, there is a message on the frame
97 in the minibuffer and it should be erased as soon
98 as it is no longer requested to appear. */
99 char *previous_echo_glyphs
;
101 /* Nonzero means truncate lines in all windows less wide than the frame */
102 int truncate_partial_width_windows
;
104 /* Nonzero means we have more than one non-minibuffer-only frame.
105 Not guaranteed to be accurate except while parsing frame-title-format. */
108 Lisp_Object Vglobal_mode_string
;
110 /* Marker for where to display an arrow on top of the buffer text. */
111 Lisp_Object Voverlay_arrow_position
;
113 /* String to display for the arrow. */
114 Lisp_Object Voverlay_arrow_string
;
116 /* Like mode-line-format, but for the titlebar on a visible frame. */
117 Lisp_Object Vframe_title_format
;
119 /* Like mode-line-format, but for the titlebar on an iconified frame. */
120 Lisp_Object Vicon_title_format
;
122 /* List of functions to call when a window's size changes. These
123 functions get one arg, a frame on which one or more windows' sizes
125 static Lisp_Object Vwindow_size_change_functions
;
127 /* Values of those variables at last redisplay. */
128 static Lisp_Object last_arrow_position
, last_arrow_string
;
130 Lisp_Object Qmenu_bar_update_hook
;
132 /* Nonzero if overlay arrow has been displayed once in this window. */
133 static int overlay_arrow_seen
;
135 /* Nonzero if visible end of buffer has already been displayed once
136 in this window. (We need this variable in case there are overlay
137 strings that get displayed there.) */
138 static int zv_strings_seen
;
140 /* Nonzero means highlight the region even in nonselected windows. */
141 static int highlight_nonselected_windows
;
143 /* If cursor motion alone moves point off frame,
144 Try scrolling this many lines up or down if that will bring it back. */
145 static int scroll_step
;
147 /* Non-0 means scroll just far enough to bring point back on the screen,
149 static int scroll_conservatively
;
151 /* Recenter the window whenever point gets within this many lines
152 of the top or bottom of the window. */
155 /* Nonzero if try_window_id has made blank lines at window bottom
156 since the last redisplay that paused */
157 static int blank_end_of_window
;
159 /* Number of windows showing the buffer of the selected window
160 (or another buffer with the same base buffer).
161 keyboard.c refers to this. */
164 /* display_text_line sets these to the frame position (origin 0) of point,
165 whether the window is selected or not.
166 Set one to -1 first to determine whether point was found afterwards. */
168 static int cursor_vpos
;
169 static int cursor_hpos
;
171 static int debug_end_pos
;
173 /* Nonzero means display mode line highlighted */
174 int mode_line_inverse_video
;
176 static void redisplay_internal ();
177 static int message_log_check_duplicate ();
178 static void echo_area_display ();
179 void mark_window_display_accurate ();
180 static void redisplay_windows ();
181 static void redisplay_window ();
182 static void update_menu_bar ();
183 static void try_window ();
184 static int try_window_id ();
185 static struct position
*display_text_line ();
186 static void display_mode_line ();
187 static int display_mode_element ();
188 static char *decode_mode_spec ();
189 static int display_string ();
190 static void display_menu_bar ();
191 static int display_count_lines ();
193 /* Prompt to display in front of the minibuffer contents */
194 Lisp_Object minibuf_prompt
;
196 /* Width in columns of current minibuffer prompt. */
197 int minibuf_prompt_width
;
199 /* Message to display instead of minibuffer contents
200 This is what the functions error and message make,
201 and command echoing uses it as well.
202 It overrides the minibuf_prompt as well as the buffer. */
203 char *echo_area_glyphs
;
205 /* This is the length of the message in echo_area_glyphs. */
206 int echo_area_glyphs_length
;
208 /* This is the window where the echo area message was displayed.
209 It is always a minibuffer window, but it may not be the
210 same window currently active as a minibuffer. */
211 Lisp_Object echo_area_window
;
213 /* true iff we should redraw the mode lines on the next redisplay */
214 int update_mode_lines
;
216 /* Smallest number of characters before the gap
217 at any time since last redisplay that finished.
218 Valid for current buffer when try_window_id can be called. */
221 /* Smallest number of characters after the gap
222 at any time since last redisplay that finished.
223 Valid for current buffer when try_window_id can be called. */
226 /* MODIFF as of last redisplay that finished;
227 if it matches MODIFF, and overlay_unchanged_modified
228 matches OVERLAY_MODIFF, that means beg_unchanged and end_unchanged
229 contain no useful information */
230 int unchanged_modified
;
232 /* OVERLAY_MODIFF as of last redisplay that finished. */
233 int overlay_unchanged_modified
;
235 /* Nonzero if window sizes or contents have changed
236 since last redisplay that finished */
237 int windows_or_buffers_changed
;
239 /* Nonzero after display_mode_line if %l was used
240 and it displayed a line number. */
241 int line_number_displayed
;
243 /* Maximum buffer size for which to display line numbers. */
244 static int line_number_display_limit
;
246 /* Number of lines to keep in the message log buffer.
247 t means infinite. nil means don't log at all. */
248 Lisp_Object Vmessage_log_max
;
250 /* Output a newline in the *Messages* buffer if "needs" one. */
253 message_log_maybe_newline ()
255 if (message_log_need_newline
)
256 message_dolog ("", 0, 1);
260 /* Add a string to the message log, optionally terminated with a newline.
261 This function calls low-level routines in order to bypass text property
262 hooks, etc. which might not be safe to run. */
265 message_dolog (m
, len
, nlflag
)
269 if (!NILP (Vmessage_log_max
))
271 struct buffer
*oldbuf
;
272 int oldpoint
, oldbegv
, oldzv
;
273 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
275 oldbuf
= current_buffer
;
276 Fset_buffer (Fget_buffer_create (build_string ("*Messages*")));
277 current_buffer
->undo_list
= Qt
;
284 oldpoint
+= len
+ nlflag
;
286 oldzv
+= len
+ nlflag
;
289 insert_1 (m
, len
, 1, 0);
292 int this_bol
, prev_bol
, dup
;
293 insert_1 ("\n", 1, 1, 0);
295 this_bol
= scan_buffer ('\n', Z
, 0, -2, 0, 0);
298 prev_bol
= scan_buffer ('\n', this_bol
, 0, -2, 0, 0);
299 dup
= message_log_check_duplicate (prev_bol
, this_bol
);
302 if (oldpoint
> prev_bol
)
303 oldpoint
-= min (this_bol
, oldpoint
) - prev_bol
;
304 if (oldbegv
> prev_bol
)
305 oldbegv
-= min (this_bol
, oldbegv
) - prev_bol
;
306 if (oldzv
> prev_bol
)
307 oldzv
-= min (this_bol
, oldzv
) - prev_bol
;
308 del_range_1 (prev_bol
, this_bol
, 0);
314 /* If you change this format, don't forget to also
315 change message_log_check_duplicate. */
316 sprintf (dupstr
, " [%d times]", dup
);
317 duplen
= strlen (dupstr
);
323 insert_1 (dupstr
, duplen
, 1, 0);
328 if (NATNUMP (Vmessage_log_max
))
330 int pos
= scan_buffer ('\n', Z
, 0,
331 -XFASTINT (Vmessage_log_max
) - 1, 0, 0);
332 oldpoint
-= min (pos
, oldpoint
) - BEG
;
333 oldbegv
-= min (pos
, oldbegv
) - BEG
;
334 oldzv
-= min (pos
, oldzv
) - BEG
;
335 del_range_1 (BEG
, pos
, 0);
340 TEMP_SET_PT (oldpoint
);
341 set_buffer_internal (oldbuf
);
342 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
343 message_log_need_newline
= !nlflag
;
347 /* We are at the end of the buffer after just having inserted a newline.
348 (Note: We depend on the fact we won't be crossing the gap.)
349 Check to see if the most recent message looks a lot like the previous one.
350 Return 0 if different, 1 if the new one should just replace it, or a
351 value N > 1 if we should also append " [N times]". */
354 message_log_check_duplicate (prev_bol
, this_bol
)
355 int prev_bol
, this_bol
;
358 int len
= Z
- 1 - this_bol
;
360 unsigned char *p1
= BUF_CHAR_ADDRESS (current_buffer
, prev_bol
);
361 unsigned char *p2
= BUF_CHAR_ADDRESS (current_buffer
, this_bol
);
363 for (i
= 0; i
< len
; i
++)
365 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.'
374 if (*p1
++ == ' ' && *p1
++ == '[')
377 while (*p1
>= '0' && *p1
<= '9')
378 n
= n
* 10 + *p1
++ - '0';
379 if (strncmp (p1
, " times]\n", 8) == 0)
385 /* Display an echo area message M with a specified length of LEN chars.
386 The string may include null characters. If M is 0, clear out any
387 existing message, and let the minibuffer text show through.
389 The buffer M must continue to exist until after the echo area
390 gets cleared or some other message gets displayed there.
392 Do not pass text that is stored in a Lisp string.
393 Do not pass text in a buffer that was alloca'd. */
400 /* First flush out any partial line written with print. */
401 message_log_maybe_newline ();
403 message_dolog (m
, len
, 1);
404 message2_nolog (m
, len
);
408 /* The non-logging counterpart of message2. */
411 message2_nolog (m
, len
)
417 if (noninteractive_need_newline
)
419 noninteractive_need_newline
= 0;
420 fwrite (m
, len
, 1, stderr
);
421 if (cursor_in_echo_area
== 0)
422 fprintf (stderr
, "\n");
425 /* A null message buffer means that the frame hasn't really been
426 initialized yet. Error messages get reported properly by
427 cmd_error, so this must be just an informative message; toss it. */
428 else if (INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
430 Lisp_Object mini_window
;
433 /* Get the frame containing the minibuffer
434 that the selected frame is using. */
435 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
436 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
438 FRAME_SAMPLE_VISIBILITY (f
);
439 if (FRAME_VISIBLE_P (selected_frame
)
440 && ! FRAME_VISIBLE_P (f
))
441 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
445 echo_area_glyphs
= m
;
446 echo_area_glyphs_length
= len
;
448 if (minibuffer_auto_raise
)
449 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
452 echo_area_glyphs
= previous_echo_glyphs
= 0;
454 do_pending_window_change ();
455 echo_area_display ();
456 update_frame (f
, 1, 1);
457 do_pending_window_change ();
458 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
459 (*frame_up_to_date_hook
) (f
);
463 /* Display a null-terminated echo area message M. If M is 0, clear out any
464 existing message, and let the minibuffer text show through.
466 The buffer M must continue to exist until after the echo area
467 gets cleared or some other message gets displayed there.
469 Do not pass text that is stored in a Lisp string.
470 Do not pass text in a buffer that was alloca'd. */
476 message2 (m
, (m
? strlen (m
) : 0));
483 message2_nolog (m
, (m
? strlen (m
) : 0));
486 /* Truncate what will be displayed in the echo area
487 the next time we display it--but don't redisplay it now. */
490 truncate_echo_area (len
)
493 /* A null message buffer means that the frame hasn't really been
494 initialized yet. Error messages get reported properly by
495 cmd_error, so this must be just an informative message; toss it. */
496 if (!noninteractive
&& INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
497 echo_area_glyphs_length
= len
;
500 /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print;
501 zero if being used by message. */
502 int message_buf_print
;
504 /* Dump an informative message to the minibuf. If M is 0, clear out
505 any existing message, and let the minibuffer text show through. */
509 message (m
, a1
, a2
, a3
)
511 EMACS_INT a1
, a2
, a3
;
517 if (noninteractive_need_newline
)
519 noninteractive_need_newline
= 0;
520 fprintf (stderr
, m
, a1
, a2
, a3
);
521 if (cursor_in_echo_area
== 0)
522 fprintf (stderr
, "\n");
526 else if (INTERACTIVE
)
528 /* The frame whose minibuffer we're going to display the message on.
529 It may be larger than the selected frame, so we need
530 to use its buffer, not the selected frame's buffer. */
531 Lisp_Object mini_window
;
534 /* Get the frame containing the minibuffer
535 that the selected frame is using. */
536 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
537 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
539 /* A null message buffer means that the frame hasn't really been
540 initialized yet. Error messages get reported properly by
541 cmd_error, so this must be just an informative message; toss it. */
542 if (FRAME_MESSAGE_BUF (f
))
553 len
= doprnt (FRAME_MESSAGE_BUF (f
),
554 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
556 len
= doprnt (FRAME_MESSAGE_BUF (f
),
557 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, &a1
);
558 #endif /* NO_ARG_ARRAY */
560 message2 (FRAME_MESSAGE_BUF (f
), len
);
565 /* Print should start at the beginning of the message
567 message_buf_print
= 0;
572 /* The non-logging version of message. */
574 message_nolog (m
, a1
, a2
, a3
)
576 EMACS_INT a1
, a2
, a3
;
578 Lisp_Object old_log_max
;
579 old_log_max
= Vmessage_log_max
;
580 Vmessage_log_max
= Qnil
;
581 message (m
, a1
, a2
, a3
);
582 Vmessage_log_max
= old_log_max
;
588 message2 (echo_area_glyphs
, echo_area_glyphs_length
);
596 Lisp_Object mini_window
;
598 /* Choose the minibuffer window for this display.
599 It is the minibuffer window used by the selected frame. */
600 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
601 /* This is the frame that window is in. */
602 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
604 if (! FRAME_VISIBLE_P (f
))
609 redraw_garbaged_frames ();
613 if (echo_area_glyphs
|| minibuf_level
== 0)
617 echo_area_window
= mini_window
;
619 vpos
= XFASTINT (XWINDOW (mini_window
)->top
);
620 get_display_line (f
, vpos
, 0);
622 /* Make sure the columns that overlap a left-hand scroll bar
624 for (i
= 0; i
< FRAME_LEFT_SCROLL_BAR_WIDTH (f
); i
++)
625 f
->desired_glyphs
->glyphs
[vpos
][i
] = SPACEGLYPH
;
627 display_string (XWINDOW (mini_window
), vpos
,
628 echo_area_glyphs
? echo_area_glyphs
: "",
629 echo_area_glyphs
? echo_area_glyphs_length
: -1,
630 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
631 0, 0, 0, FRAME_WIDTH (f
));
633 #if 0 /* This just gets in the way. update_frame does the job. */
634 /* If desired cursor location is on this line, put it at end of text */
635 if (cursor_in_echo_area
)
636 FRAME_CURSOR_Y (f
) = vpos
;
637 if (FRAME_CURSOR_Y (f
) == vpos
)
638 FRAME_CURSOR_X (f
) = FRAME_DESIRED_GLYPHS (f
)->used
[vpos
];
641 /* Fill the rest of the minibuffer window with blank lines. */
646 i
< vpos
+ XFASTINT (XWINDOW (mini_window
)->height
); i
++)
648 get_display_line (f
, i
, 0);
649 display_string (XWINDOW (mini_window
), vpos
,
651 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
652 0, 0, 0, FRAME_WIDTH (f
));
656 else if (!EQ (mini_window
, selected_window
))
657 windows_or_buffers_changed
++;
659 if (EQ (mini_window
, selected_window
))
660 this_line_bufpos
= 0;
662 previous_echo_glyphs
= echo_area_glyphs
;
665 /* Update frame titles. */
667 #ifdef HAVE_WINDOW_SYSTEM
668 static char frame_title_buf
[512];
669 static char *frame_title_ptr
;
672 store_frame_title (str
, mincol
, maxcol
)
677 if (maxcol
< 0 || maxcol
>= sizeof(frame_title_buf
))
678 maxcol
= sizeof (frame_title_buf
);
679 limit
= &frame_title_buf
[maxcol
];
680 while (*str
!= '\0' && frame_title_ptr
< limit
)
681 *frame_title_ptr
++ = *str
++;
682 while (frame_title_ptr
< &frame_title_buf
[mincol
])
683 *frame_title_ptr
++ = ' ';
684 return frame_title_ptr
- frame_title_buf
;
688 x_consider_frame_title (frame
)
694 FRAME_PTR f
= XFRAME (frame
);
696 if (!(FRAME_WINDOW_P (f
) || FRAME_MINIBUF_ONLY_P (f
) || f
->explicit_name
))
699 /* Do we have more than one visible frame on this X display? */
703 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
705 FRAME_PTR tf
= XFRAME (XCONS (tail
)->car
);
707 if (tf
!= f
&& FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
708 && !FRAME_MINIBUF_ONLY_P (tf
)
709 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
713 multiple_frames
= CONSP (tail
);
716 obuf
= current_buffer
;
717 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
718 fmt
= (FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
);
719 frame_title_ptr
= frame_title_buf
;
720 len
= display_mode_element (XWINDOW (f
->selected_window
), 0, 0, 0,
721 0, sizeof (frame_title_buf
), fmt
);
723 set_buffer_internal (obuf
);
724 /* Set the name only if it's changed. This avoids consing
725 in the common case where it hasn't. (If it turns out that we've
726 already wasted too much time by walking through the list with
727 display_mode_element, then we might need to optimize at a higher
729 if (! STRINGP (f
->name
) || XSTRING (f
->name
)->size
!= len
730 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
731 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
734 #define frame_title_ptr ((char *)0)
735 #define store_frame_title(str, mincol, maxcol) 0
738 /* Prepare for redisplay by updating menu-bar item lists when appropriate.
739 This can call eval. */
744 register struct window
*w
= XWINDOW (selected_window
);
746 struct gcpro gcpro1
, gcpro2
;
748 all_windows
= (update_mode_lines
|| buffer_shared
> 1
749 || windows_or_buffers_changed
);
751 /* Update all frame titles based on their buffer names, etc.
752 We do this before the menu bars so that the buffer-menu
753 will show the up-to-date frame titles.
755 This used to be done after the menu bars, for a reason that
756 was stated as follows but which I do not understand:
757 "We do this after the menu bars so that the frame will first
758 create its menu bar using the name `emacs' if no other name
759 has yet been specified."
760 I think that is no longer a concern. */
761 #ifdef HAVE_WINDOW_SYSTEM
762 if (windows_or_buffers_changed
|| update_mode_lines
)
764 Lisp_Object tail
, frame
;
766 FOR_EACH_FRAME (tail
, frame
)
767 if (FRAME_VISIBLE_P (XFRAME (frame
))
768 || FRAME_ICONIFIED_P (XFRAME (frame
)))
769 x_consider_frame_title (frame
);
773 /* Update the menu bar item lists, if appropriate.
774 This has to be done before any actual redisplay
775 or generation of display lines. */
778 Lisp_Object tail
, frame
;
779 int count
= specpdl_ptr
- specpdl
;
781 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
783 FOR_EACH_FRAME (tail
, frame
)
785 /* If a window on this frame changed size,
786 report that to the user and clear the size-change flag. */
787 if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)))
789 Lisp_Object functions
;
790 /* Clear flag first in case we get error below. */
791 FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)) = 0;
792 functions
= Vwindow_size_change_functions
;
793 GCPRO2 (tail
, functions
);
794 while (CONSP (functions
))
796 call1 (XCONS (functions
)->car
, frame
);
797 functions
= XCONS (functions
)->cdr
;
802 update_menu_bar (XFRAME (frame
), 0);
806 unbind_to (count
, Qnil
);
809 update_menu_bar (selected_frame
, 1);
811 /* Motif needs this. See comment in xmenu.c.
812 Turn it off when pending_menu_activation is not defined. */
814 pending_menu_activation
= 0;
818 /* Do a frame update, taking possible shortcuts into account.
819 This is the main external entry point for redisplay.
821 If the last redisplay displayed an echo area message and that
822 message is no longer requested, we clear the echo area
823 or bring back the minibuffer if that is in use.
825 Do not call eval from within this function.
826 Calls to eval after the call to echo_area_display would confuse
827 the display_line mechanism and would cause a crash.
828 Calls to eval before that point will work most of the time,
829 but can still lose, because this function
830 can be called from signal handlers; with alarms set up;
831 or with synchronous processes running.
833 See Fcall_process; if you called it from here, it could be
834 entered recursively. */
836 static int do_verify_charstarts
;
838 /* Counter is used to clear the face cache
839 no more than once ever 1000 redisplays. */
840 static int clear_face_cache_count
;
842 /* Record the previous terminal frame we displayed. */
843 static FRAME_PTR previous_terminal_frame
;
848 redisplay_internal (0);
851 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay
852 is not in response to any user action; therefore, we should
853 preserve the echo area. (Actually, our caller does that job.)
854 Perhaps in the future avoid recentering windows
855 if it is not necessary; currently that causes some problems. */
858 redisplay_internal (preserve_echo_area
)
859 int preserve_echo_area
;
861 register struct window
*w
= XWINDOW (selected_window
);
865 register int tlbufpos
, tlendpos
;
872 if (popup_activated ())
876 if (! FRAME_WINDOW_P (selected_frame
)
877 && previous_terminal_frame
!= selected_frame
)
879 /* Since frames on an ASCII terminal share the same display area,
880 displaying a different frame means redisplay the whole thing. */
881 windows_or_buffers_changed
++;
882 SET_FRAME_GARBAGED (selected_frame
);
883 XSETFRAME (Vterminal_frame
, selected_frame
);
885 previous_terminal_frame
= selected_frame
;
887 /* Set the visible flags for all frames.
888 Do this before checking for resized or garbaged frames; they want
889 to know if their frames are visible.
890 See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */
892 Lisp_Object tail
, frame
;
894 FOR_EACH_FRAME (tail
, frame
)
896 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
898 /* Clear out all the display lines in which we will generate the
899 glyphs to display. */
900 init_desired_glyphs (XFRAME (frame
));
904 /* Notice any pending interrupt request to change frame size. */
905 do_pending_window_change ();
909 redraw_garbaged_frames ();
913 prepare_menu_bars ();
915 if (windows_or_buffers_changed
)
918 /* Detect case that we need to write or remove a star in the mode line. */
919 if ((SAVE_MODIFF
< MODIFF
) != !NILP (w
->last_had_star
))
921 w
->update_mode_line
= Qt
;
922 if (buffer_shared
> 1)
926 /* If %c is in use, update it if needed. */
927 if (!NILP (w
->column_number_displayed
)
928 /* This alternative quickly identifies a common case
929 where no change is needed. */
930 && !(PT
== XFASTINT (w
->last_point
)
931 && XFASTINT (w
->last_modified
) >= MODIFF
932 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
933 && XFASTINT (w
->column_number_displayed
) != current_column ())
934 w
->update_mode_line
= Qt
;
936 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
938 all_windows
= update_mode_lines
|| buffer_shared
> 1;
940 /* If specs for an arrow have changed, do thorough redisplay
941 to ensure we remove any arrow that should no longer exist. */
942 if (! EQ (Voverlay_arrow_position
, last_arrow_position
)
943 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
946 /* Normally the message* functions will have already displayed and
947 updated the echo area, but the frame may have been trashed, or
948 the update may have been preempted, so display the echo area
950 if (echo_area_glyphs
|| previous_echo_glyphs
)
952 echo_area_display ();
956 /* If showing region, and mark has changed, must redisplay whole window. */
957 if (((!NILP (Vtransient_mark_mode
)
958 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
959 != !NILP (w
->region_showing
))
960 || (!NILP (w
->region_showing
)
961 && !EQ (w
->region_showing
,
962 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
963 this_line_bufpos
= -1;
965 tlbufpos
= this_line_bufpos
;
966 tlendpos
= this_line_endpos
;
967 if (!all_windows
&& tlbufpos
> 0 && NILP (w
->update_mode_line
)
968 && !current_buffer
->clip_changed
969 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
970 /* Make sure recorded data applies to current buffer, etc */
971 && this_line_buffer
== current_buffer
972 && current_buffer
== XBUFFER (w
->buffer
)
973 && NILP (w
->force_start
)
974 /* Point must be on the line that we have info recorded about */
976 && PT
<= Z
- tlendpos
977 /* All text outside that line, including its final newline,
979 && ((XFASTINT (w
->last_modified
) >= MODIFF
980 && (XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
))
981 || (beg_unchanged
>= tlbufpos
- 1
983 /* If selective display, can't optimize
984 if the changes start at the beginning of the line. */
985 && ((INTEGERP (current_buffer
->selective_display
)
986 && XINT (current_buffer
->selective_display
) > 0
987 ? (beg_unchanged
>= tlbufpos
990 && end_unchanged
>= tlendpos
991 && Z
- GPT
>= tlendpos
)))
993 if (tlbufpos
> BEGV
&& FETCH_BYTE (tlbufpos
- 1) != '\n'
995 || FETCH_BYTE (tlbufpos
) == '\n'))
996 /* Former continuation line has disappeared by becoming empty */
998 else if (XFASTINT (w
->last_modified
) < MODIFF
999 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
1000 || MINI_WINDOW_P (w
))
1002 /* We have to handle the case of continuation around a
1003 wide-column character (See the comment in indent.c around
1006 For instance, in the following case:
1008 -------- Insert --------
1009 K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars.
1010 J_I_ ==> J_I_ `^^' are cursors.
1014 As we have to redraw the line above, we should goto cancel. */
1016 struct position val
;
1019 prevline
= find_next_newline (tlbufpos
, -1);
1020 val
= *compute_motion (prevline
, 0,
1021 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1024 1 << (BITS_PER_SHORT
- 1),
1025 1 << (BITS_PER_SHORT
- 1),
1026 window_internal_width (w
) - 1,
1027 XINT (w
->hscroll
), 0, w
);
1028 if (val
.hpos
!= this_line_start_hpos
)
1032 overlay_arrow_seen
= 0;
1033 zv_strings_seen
= 0;
1034 display_text_line (w
, tlbufpos
, this_line_vpos
, this_line_start_hpos
,
1035 pos_tab_offset (w
, tlbufpos
), 0);
1036 /* If line contains point, is not continued,
1037 and ends at same distance from eob as before, we win */
1038 if (cursor_vpos
>= 0 && this_line_bufpos
1039 && this_line_endpos
== tlendpos
)
1041 /* If this is not the window's last line,
1042 we must adjust the charstarts of the lines below. */
1043 if (this_line_vpos
+ 1
1044 < XFASTINT (w
->top
) + window_internal_height (w
))
1046 int left
= WINDOW_LEFT_MARGIN (w
);
1047 int *charstart_next_line
1048 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[this_line_vpos
+ 1];
1051 if (Z
- tlendpos
== ZV
)
1052 /* This line ends at end of (accessible part of) buffer.
1053 There is no newline to count. */
1054 adjust
= Z
- tlendpos
- charstart_next_line
[left
];
1056 /* This line ends in a newline.
1057 Must take account of the newline and the rest of the
1058 text that follows. */
1059 adjust
= Z
- tlendpos
+ 1 - charstart_next_line
[left
];
1061 adjust_window_charstarts (w
, this_line_vpos
, adjust
);
1064 if (!WINDOW_FULL_WIDTH_P (w
))
1065 preserve_other_columns (w
);
1071 else if (PT
== XFASTINT (w
->last_point
)
1072 /* Make sure the cursor was last displayed
1073 in this window. Otherwise we have to reposition it. */
1074 && XINT (w
->top
) <= FRAME_CURSOR_Y (selected_frame
)
1075 && (XINT (w
->top
) + XINT (w
->height
)
1076 > FRAME_CURSOR_Y (selected_frame
)))
1080 do_pending_window_change ();
1085 /* If highlighting the region, or if the cursor is in the echo area,
1086 then we can't just move the cursor. */
1087 else if (! (!NILP (Vtransient_mark_mode
)
1088 && !NILP (current_buffer
->mark_active
))
1089 && w
== XWINDOW (current_buffer
->last_selected_window
)
1090 && NILP (w
->region_showing
)
1091 && !cursor_in_echo_area
)
1093 pos
= *compute_motion (tlbufpos
, 0,
1094 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1096 PT
, 2, - (1 << (BITS_PER_SHORT
- 1)),
1097 window_internal_width (w
) - 1,
1099 pos_tab_offset (w
, tlbufpos
), w
);
1102 int width
= window_internal_width (w
) - 1;
1103 FRAME_CURSOR_X (selected_frame
)
1104 = WINDOW_LEFT_MARGIN (w
) + minmax (0, pos
.hpos
, width
);
1105 FRAME_CURSOR_Y (selected_frame
) = this_line_vpos
;
1112 /* Text changed drastically or point moved off of line */
1113 cancel_line (this_line_vpos
, selected_frame
);
1116 this_line_bufpos
= 0;
1117 all_windows
|= buffer_shared
> 1;
1119 clear_face_cache_count
++;
1123 Lisp_Object tail
, frame
;
1126 /* Clear the face cache, only when we do a full redisplay
1127 and not too often either. */
1128 if (clear_face_cache_count
> 1000)
1130 clear_face_cache ();
1131 clear_face_cache_count
= 0;
1135 /* Recompute # windows showing selected buffer.
1136 This will be incremented each time such a window is displayed. */
1139 FOR_EACH_FRAME (tail
, frame
)
1141 FRAME_PTR f
= XFRAME (frame
);
1142 if (FRAME_WINDOW_P (f
) || f
== selected_frame
)
1145 /* Mark all the scroll bars to be removed; we'll redeem the ones
1146 we want when we redisplay their windows. */
1147 if (condemn_scroll_bars_hook
)
1148 (*condemn_scroll_bars_hook
) (f
);
1150 if (FRAME_VISIBLE_P (f
))
1151 redisplay_windows (FRAME_ROOT_WINDOW (f
), preserve_echo_area
);
1153 /* Any scroll bars which redisplay_windows should have nuked
1154 should now go away. */
1155 if (judge_scroll_bars_hook
)
1156 (*judge_scroll_bars_hook
) (f
);
1160 else if (FRAME_VISIBLE_P (selected_frame
))
1162 redisplay_window (selected_window
, 1, preserve_echo_area
);
1163 if (!WINDOW_FULL_WIDTH_P (w
))
1164 preserve_other_columns (w
);
1168 /* Prevent various kinds of signals during display update.
1169 stdio is not robust about handling signals,
1170 which can cause an apparent I/O error. */
1171 if (interrupt_input
)
1181 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1185 if (!FRAMEP (XCONS (tail
)->car
))
1188 f
= XFRAME (XCONS (tail
)->car
);
1190 if ((FRAME_WINDOW_P (f
) || f
== selected_frame
)
1191 && FRAME_VISIBLE_P (f
))
1193 pause
|= update_frame (f
, 0, 0);
1196 mark_window_display_accurate (f
->root_window
, 1);
1197 if (frame_up_to_date_hook
!= 0)
1198 (*frame_up_to_date_hook
) (f
);
1205 if (FRAME_VISIBLE_P (selected_frame
))
1206 pause
= update_frame (selected_frame
, 0, 0);
1210 /* We may have called echo_area_display at the top of this
1211 function. If the echo area is on another frame, that may
1212 have put text on a frame other than the selected one, so the
1213 above call to update_frame would not have caught it. Catch
1216 Lisp_Object mini_window
;
1217 FRAME_PTR mini_frame
;
1219 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
1220 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
1222 if (mini_frame
!= selected_frame
&& FRAME_WINDOW_P (mini_frame
))
1223 pause
|= update_frame (mini_frame
, 0, 0);
1227 /* If frame does not match, prevent doing single-line-update next time.
1228 Also, don't forget to check every line to update the arrow. */
1231 this_line_bufpos
= 0;
1232 if (!NILP (last_arrow_position
))
1234 last_arrow_position
= Qt
;
1235 last_arrow_string
= Qt
;
1237 /* If we pause after scrolling, some lines in current_frame
1238 may be null, so preserve_other_columns won't be able to
1239 preserve all the vertical-bar separators. So, avoid using it
1241 if (!WINDOW_FULL_WIDTH_P (w
))
1242 update_mode_lines
= 1;
1245 /* Now text on frame agrees with windows, so
1246 put info into the windows for partial redisplay to follow */
1250 register struct buffer
*b
= XBUFFER (w
->buffer
);
1252 blank_end_of_window
= 0;
1253 unchanged_modified
= BUF_MODIFF (b
);
1254 overlay_unchanged_modified
= BUF_OVERLAY_MODIFF (b
);
1255 beg_unchanged
= BUF_GPT (b
) - BUF_BEG (b
);
1256 end_unchanged
= BUF_Z (b
) - BUF_GPT (b
);
1258 XSETFASTINT (w
->last_point
, BUF_PT (b
));
1259 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (selected_frame
));
1260 XSETFASTINT (w
->last_point_y
, FRAME_CURSOR_Y (selected_frame
));
1263 mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame
), 1);
1266 b
->clip_changed
= 0;
1267 w
->update_mode_line
= Qnil
;
1268 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
1269 XSETFASTINT (w
->last_overlay_modified
, BUF_OVERLAY_MODIFF (b
));
1271 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1273 w
->window_end_valid
= w
->buffer
;
1274 last_arrow_position
= Voverlay_arrow_position
;
1275 last_arrow_string
= Voverlay_arrow_string
;
1276 if (do_verify_charstarts
)
1277 verify_charstarts (w
);
1278 if (frame_up_to_date_hook
!= 0)
1279 (*frame_up_to_date_hook
) (selected_frame
);
1281 update_mode_lines
= 0;
1282 windows_or_buffers_changed
= 0;
1285 /* Start SIGIO interrupts coming again.
1286 Having them off during the code above
1287 makes it less likely one will discard output,
1288 but not impossible, since there might be stuff
1289 in the system buffer here.
1290 But it is much hairier to try to do anything about that. */
1292 if (interrupt_input
)
1296 /* Change frame size now if a change is pending. */
1297 do_pending_window_change ();
1299 /* If we just did a pending size change, redisplay again
1300 for the new size. */
1301 if (windows_or_buffers_changed
&& !pause
)
1305 /* Redisplay, but leave alone any recent echo area message
1306 unless another message has been requested in its place.
1308 This is useful in situations where you need to redisplay but no
1309 user action has occurred, making it inappropriate for the message
1310 area to be cleared. See tracking_off and
1311 wait_reading_process_input for examples of these situations. */
1313 redisplay_preserve_echo_area ()
1315 if (echo_area_glyphs
== 0 && previous_echo_glyphs
!= 0)
1317 echo_area_glyphs
= previous_echo_glyphs
;
1318 redisplay_internal (1);
1319 echo_area_glyphs
= 0;
1322 redisplay_internal (1);
1326 mark_window_display_accurate (window
, flag
)
1330 register struct window
*w
;
1332 for (;!NILP (window
); window
= w
->next
)
1334 if (!WINDOWP (window
)) abort ();
1335 w
= XWINDOW (window
);
1337 if (!NILP (w
->buffer
))
1339 XSETFASTINT (w
->last_modified
,
1340 !flag
? 0 : BUF_MODIFF (XBUFFER (w
->buffer
)));
1341 XSETFASTINT (w
->last_overlay_modified
,
1342 !flag
? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w
->buffer
)));
1344 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1347 /* Record if we are showing a region, so can make sure to
1348 update it fully at next redisplay. */
1349 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1350 && w
== XWINDOW (current_buffer
->last_selected_window
)
1351 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1352 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1356 w
->window_end_valid
= w
->buffer
;
1357 w
->update_mode_line
= Qnil
;
1358 if (!NILP (w
->buffer
) && flag
)
1359 XBUFFER (w
->buffer
)->clip_changed
= 0;
1361 if (!NILP (w
->vchild
))
1362 mark_window_display_accurate (w
->vchild
, flag
);
1363 if (!NILP (w
->hchild
))
1364 mark_window_display_accurate (w
->hchild
, flag
);
1369 last_arrow_position
= Voverlay_arrow_position
;
1370 last_arrow_string
= Voverlay_arrow_string
;
1374 /* t is unequal to any useful value of Voverlay_arrow_... */
1375 last_arrow_position
= Qt
;
1376 last_arrow_string
= Qt
;
1380 /* Update the menu bar item list for frame F.
1381 This has to be done before we start to fill in any display lines,
1382 because it can call eval.
1384 If SAVE_MATCH_DATA is 1, we must save and restore it here. */
1387 update_menu_bar (f
, save_match_data
)
1389 int save_match_data
;
1391 struct buffer
*old
= current_buffer
;
1393 register struct window
*w
;
1395 window
= FRAME_SELECTED_WINDOW (f
);
1396 w
= XWINDOW (window
);
1398 if (update_mode_lines
)
1399 w
->update_mode_line
= Qt
;
1401 if (FRAME_WINDOW_P (f
)
1403 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1404 FRAME_EXTERNAL_MENU_BAR (f
)
1406 FRAME_MENU_BAR_LINES (f
) > 0
1408 : FRAME_MENU_BAR_LINES (f
) > 0)
1410 /* If the user has switched buffers or windows, we need to
1411 recompute to reflect the new bindings. But we'll
1412 recompute when update_mode_lines is set too; that means
1413 that people can use force-mode-line-update to request
1414 that the menu bar be recomputed. The adverse effect on
1415 the rest of the redisplay algorithm is about the same as
1416 windows_or_buffers_changed anyway. */
1417 if (windows_or_buffers_changed
1418 || !NILP (w
->update_mode_line
)
1419 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1420 < BUF_MODIFF (XBUFFER (w
->buffer
)))
1421 != !NILP (w
->last_had_star
))
1422 || ((!NILP (Vtransient_mark_mode
)
1423 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1424 != !NILP (w
->region_showing
)))
1426 struct buffer
*prev
= current_buffer
;
1427 int count
= specpdl_ptr
- specpdl
;
1429 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1430 if (save_match_data
)
1431 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
1432 if (NILP (Voverriding_local_map_menu_flag
))
1434 specbind (Qoverriding_terminal_local_map
, Qnil
);
1435 specbind (Qoverriding_local_map
, Qnil
);
1438 /* Run the Lucid hook. */
1439 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
1440 /* If it has changed current-menubar from previous value,
1441 really recompute the menubar from the value. */
1442 if (! NILP (Vlucid_menu_bar_dirty_flag
))
1443 call0 (Qrecompute_lucid_menubar
);
1444 safe_run_hooks (Qmenu_bar_update_hook
);
1445 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
1446 /* Redisplay the menu bar in case we changed it. */
1447 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1448 if (FRAME_WINDOW_P (f
))
1449 set_frame_menubar (f
, 0, 0);
1451 /* On a terminal screen, the menu bar is an ordinary screen
1452 line, and this makes it get updated. */
1453 w
->update_mode_line
= Qt
;
1454 #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1455 /* In the non-toolkit version, the menu bar is an ordinary screen
1456 line, and this makes it get updated. */
1457 w
->update_mode_line
= Qt
;
1458 #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1460 unbind_to (count
, Qnil
);
1461 set_buffer_internal_1 (prev
);
1468 /* Redisplay WINDOW and its subwindows and siblings. */
1471 redisplay_windows (window
, preserve_echo_area
)
1473 int preserve_echo_area
;
1475 for (; !NILP (window
); window
= XWINDOW (window
)->next
)
1476 redisplay_window (window
, 0, preserve_echo_area
);
1479 /* Redisplay window WINDOW and its subwindows. */
1482 redisplay_window (window
, just_this_one
, preserve_echo_area
)
1484 int just_this_one
, preserve_echo_area
;
1486 register struct window
*w
= XWINDOW (window
);
1487 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
1489 register int lpoint
= PT
;
1490 struct buffer
*old
= current_buffer
;
1491 register int width
= window_internal_width (w
) - 1;
1492 register int startp
;
1493 register int hscroll
= XINT (w
->hscroll
);
1494 struct position pos
;
1497 int update_mode_line
;
1498 struct Lisp_Char_Table
*dp
= window_display_table (w
);
1500 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1502 /* If this is a combination window, do its children; that's all. */
1504 if (!NILP (w
->vchild
))
1506 redisplay_windows (w
->vchild
, preserve_echo_area
);
1509 if (!NILP (w
->hchild
))
1511 redisplay_windows (w
->hchild
, preserve_echo_area
);
1514 if (NILP (w
->buffer
))
1517 height
= window_internal_height (w
);
1518 update_mode_line
= (!NILP (w
->update_mode_line
) || update_mode_lines
);
1519 if (XBUFFER (w
->buffer
)->clip_changed
)
1520 update_mode_line
= 1;
1522 if (MINI_WINDOW_P (w
))
1524 if (w
== XWINDOW (echo_area_window
) && echo_area_glyphs
)
1525 /* We've already displayed the echo area glyphs in this window. */
1526 goto finish_scroll_bars
;
1527 else if (w
!= XWINDOW (minibuf_window
))
1529 /* This is a minibuffer, but it's not the currently active one,
1531 int vpos
= XFASTINT (w
->top
);
1534 for (i
= 0; i
< height
; i
++)
1536 get_display_line (f
, vpos
+ i
, 0);
1537 display_string (w
, vpos
+ i
, "", 0,
1538 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
1542 goto finish_scroll_bars
;
1546 /* Otherwise set up data on this window; select its buffer and point value */
1548 if (update_mode_line
)
1549 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1551 set_buffer_temp (XBUFFER (w
->buffer
));
1555 /* If %c is in mode line, update it if needed. */
1556 if (!NILP (w
->column_number_displayed
)
1557 /* This alternative quickly identifies a common case
1558 where no change is needed. */
1559 && !(PT
== XFASTINT (w
->last_point
)
1560 && XFASTINT (w
->last_modified
) >= MODIFF
1561 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1562 && XFASTINT (w
->column_number_displayed
) != current_column ())
1563 update_mode_line
= 1;
1565 /* Count number of windows showing the selected buffer.
1566 An indirect buffer counts as its base buffer. */
1570 struct buffer
*current_base
, *window_base
;
1571 current_base
= current_buffer
;
1572 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
1573 if (current_base
->base_buffer
)
1574 current_base
= current_base
->base_buffer
;
1575 if (window_base
->base_buffer
)
1576 window_base
= window_base
->base_buffer
;
1577 if (current_base
== window_base
)
1581 /* POINT refers normally to the selected window.
1582 For any other window, set up appropriate value. */
1584 if (!EQ (window
, selected_window
))
1586 int new_pt
= marker_position (w
->pointm
);
1590 Fset_marker (w
->pointm
, make_number (new_pt
), Qnil
);
1592 else if (new_pt
> (ZV
- 1))
1595 Fset_marker (w
->pointm
, make_number (new_pt
), Qnil
);
1597 /* We don't use SET_PT so that the point-motion hooks don't run. */
1598 BUF_PT (current_buffer
) = new_pt
;
1601 /* If any of the character widths specified in the display table
1602 have changed, invalidate the width run cache. It's true that this
1603 may be a bit late to catch such changes, but the rest of
1604 redisplay goes (non-fatally) haywire when the display table is
1605 changed, so why should we worry about doing any better? */
1606 if (current_buffer
->width_run_cache
)
1608 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
1610 if (! disptab_matches_widthtab (disptab
,
1611 XVECTOR (current_buffer
->width_table
)))
1613 invalidate_region_cache (current_buffer
,
1614 current_buffer
->width_run_cache
,
1616 recompute_width_table (current_buffer
, disptab
);
1620 /* If window-start is screwed up, choose a new one. */
1621 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
1624 startp
= marker_position (w
->start
);
1626 /* If someone specified a new starting point but did not insist,
1627 check whether it can be used. */
1628 if (!NILP (w
->optional_new_start
))
1630 w
->optional_new_start
= Qnil
;
1631 /* Check whether this start pos is usable given where point is. */
1633 pos
= *compute_motion (startp
, 0,
1634 (((EQ (window
, minibuf_window
)
1636 ? minibuf_prompt_width
: 0)
1637 + (hscroll
? 1 - hscroll
: 0)),
1640 /* BUG FIX: See the comment of
1641 Fpos_visible_in_window_p (window.c). */
1642 - (1 << (BITS_PER_SHORT
- 1)),
1643 width
, hscroll
, pos_tab_offset (w
, startp
), w
);
1644 /* If PT does fit on the screen, we will use this start pos,
1645 so do so by setting force_start. */
1646 if (pos
.bufpos
== PT
)
1647 w
->force_start
= Qt
;
1650 /* Handle case where place to start displaying has been specified,
1651 unless the specified location is outside the accessible range. */
1652 if (!NILP (w
->force_start
))
1654 w
->force_start
= Qnil
;
1655 /* Forget any recorded base line for line number display. */
1656 w
->base_line_number
= Qnil
;
1657 /* Redisplay the mode line. Select the buffer properly for that.
1658 Also, run the hook window-scroll-functions
1659 because we have scrolled. */
1660 /* Note, we do this after clearing force_start because
1661 if there's an error, it is better to forget about force_start
1662 than to get into an infinite loop calling the hook functions
1663 and having them get more errors. */
1664 if (!update_mode_line
1665 || ! NILP (Vwindow_scroll_functions
))
1667 Lisp_Object temp
[3];
1669 set_buffer_temp (old
);
1670 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1671 update_mode_line
= 1;
1672 w
->update_mode_line
= Qt
;
1673 if (! NILP (Vwindow_scroll_functions
))
1675 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1676 make_number (startp
));
1677 startp
= marker_position (w
->start
);
1680 XSETFASTINT (w
->last_modified
, 0);
1681 XSETFASTINT (w
->last_overlay_modified
, 0);
1682 if (startp
< BEGV
) startp
= BEGV
;
1683 if (startp
> ZV
) startp
= ZV
;
1684 try_window (window
, startp
);
1685 if (cursor_vpos
< 0)
1687 /* If point does not appear, move point so it does appear */
1688 pos
= *compute_motion (startp
, 0,
1689 (((EQ (window
, minibuf_window
)
1691 ? minibuf_prompt_width
: 0)
1692 + (hscroll
? 1 - hscroll
: 0)),
1695 - (1 << (BITS_PER_SHORT
- 1)),
1696 width
, hscroll
, pos_tab_offset (w
, startp
), w
);
1697 BUF_PT (current_buffer
) = pos
.bufpos
;
1698 if (w
!= XWINDOW (selected_window
))
1699 Fset_marker (w
->pointm
, make_number (PT
), Qnil
);
1702 if (current_buffer
== old
)
1704 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
1705 + minmax (0, pos
.hpos
, width
));
1706 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1708 /* If we are highlighting the region,
1709 then we just changed the region, so redisplay to show it. */
1710 if (!NILP (Vtransient_mark_mode
)
1711 && !NILP (current_buffer
->mark_active
))
1713 cancel_my_columns (XWINDOW (window
));
1714 try_window (window
, startp
);
1720 /* Handle case where text has not changed, only point,
1721 and it has not moved off the frame. */
1723 /* This code is not used for minibuffer for the sake of
1724 the case of redisplaying to replace an echo area message;
1725 since in that case the minibuffer contents per se are usually unchanged.
1726 This code is of no real use in the minibuffer since
1727 the handling of this_line_bufpos, etc.,
1728 in redisplay handles the same cases. */
1730 if (XFASTINT (w
->last_modified
) >= MODIFF
1731 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
1732 && PT
>= startp
&& !current_buffer
->clip_changed
1733 && (just_this_one
|| WINDOW_FULL_WIDTH_P (w
))
1734 /* If force-mode-line-update was called, really redisplay;
1735 that's how redisplay is forced after e.g. changing
1736 buffer-invisibility-spec. */
1737 && NILP (w
->update_mode_line
)
1738 /* Can't use this case if highlighting a region. */
1739 && !(!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
1740 && NILP (w
->region_showing
)
1741 /* If end pos is out of date, scroll bar and percentage will be wrong */
1742 && INTEGERP (w
->window_end_vpos
)
1743 && XFASTINT (w
->window_end_vpos
) < XFASTINT (w
->height
)
1744 && !EQ (window
, minibuf_window
))
1746 int this_scroll_margin
= scroll_margin
;
1748 pos
= *compute_motion (startp
, 0, (hscroll
? 1 - hscroll
: 0), 0,
1750 /* BUG FIX: See the comment of
1751 Fpos_visible_in_window_p (window.c). */
1752 - (1 << (BITS_PER_SHORT
- 1)),
1754 pos_tab_offset (w
, startp
), w
);
1756 /* Don't use a scroll margin that is negative or too large. */
1757 if (this_scroll_margin
< 0)
1758 this_scroll_margin
= 0;
1760 if (XINT (w
->height
) < 4 * scroll_margin
)
1761 this_scroll_margin
= XINT (w
->height
) / 4;
1763 /* If point fits on the screen, and not within the scroll margin,
1765 if (pos
.vpos
< height
- this_scroll_margin
1766 && (pos
.vpos
>= this_scroll_margin
|| startp
== BEGV
))
1768 /* Ok, point is still on frame */
1769 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
1771 /* These variables are supposed to be origin 1 */
1772 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
1773 + minmax (0, pos
.hpos
, width
));
1774 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1776 /* This doesn't do the trick, because if a window to the right of
1777 this one must be redisplayed, this does nothing because there
1778 is nothing in DesiredFrame yet, and then the other window is
1779 redisplayed, making likes that are empty in this window's columns.
1780 if (WINDOW_FULL_WIDTH_P (w))
1781 preserve_my_columns (w);
1785 /* Don't bother trying redisplay with same start;
1786 we already know it will lose */
1788 /* If current starting point was originally the beginning of a line
1789 but no longer is, find a new starting point. */
1790 else if (!NILP (w
->start_at_line_beg
)
1792 || FETCH_BYTE (startp
- 1) == '\n'))
1796 else if (just_this_one
&& !MINI_WINDOW_P (w
)
1798 && XFASTINT (w
->last_modified
)
1799 /* or else vmotion on first line won't work. */
1800 && ! NILP (w
->start_at_line_beg
)
1801 && ! EQ (w
->window_end_valid
, Qnil
)
1802 && do_id
&& !current_buffer
->clip_changed
1803 && !blank_end_of_window
1804 && WINDOW_FULL_WIDTH_P (w
)
1805 /* Can't use this case if highlighting a region. */
1806 && !(!NILP (Vtransient_mark_mode
)
1807 && !NILP (current_buffer
->mark_active
))
1808 /* Don't use try_window_id if newline
1809 doesn't display as the end of a line. */
1810 && !(dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, '\n')))
1811 && NILP (w
->region_showing
)
1812 && EQ (last_arrow_position
, Voverlay_arrow_position
)
1813 && EQ (last_arrow_string
, Voverlay_arrow_string
)
1814 && (tem
= try_window_id (FRAME_SELECTED_WINDOW (f
)))
1817 /* tem > 0 means success. tem == -1 means choose new start.
1818 tem == -2 means try again with same start,
1819 and nothing but whitespace follows the changed stuff.
1820 tem == 0 means try again with same start. */
1824 else if (startp
>= BEGV
&& startp
<= ZV
1826 /* Avoid starting at end of buffer. */
1827 #if 0 /* This change causes trouble for M-! finger & RET.
1828 It will have to be considered later. */
1829 || ! EQ (window
, selected_window
)
1830 /* Don't do the recentering if redisplay
1831 is not for no user action. */
1832 || preserve_echo_area
1835 || (XFASTINT (w
->last_modified
) >= MODIFF
1836 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
1838 /* Try to redisplay starting at same place as before */
1839 /* If point has not moved off frame, accept the results */
1840 try_window (window
, startp
);
1841 if (cursor_vpos
>= 0)
1843 if (!just_this_one
|| current_buffer
->clip_changed
1844 || beg_unchanged
< startp
)
1845 /* Forget any recorded base line for line number display. */
1846 w
->base_line_number
= Qnil
;
1850 cancel_my_columns (w
);
1853 XSETFASTINT (w
->last_modified
, 0);
1854 XSETFASTINT (w
->last_overlay_modified
, 0);
1855 /* Redisplay the mode line. Select the buffer properly for that. */
1856 if (!update_mode_line
)
1858 set_buffer_temp (old
);
1859 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1860 update_mode_line
= 1;
1861 w
->update_mode_line
= Qt
;
1864 /* Try to scroll by specified few lines */
1866 if (scroll_conservatively
&& !current_buffer
->clip_changed
1867 && startp
>= BEGV
&& startp
<= ZV
)
1869 int this_scroll_margin
= scroll_margin
;
1871 /* Don't use a scroll margin that is negative or too large. */
1872 if (this_scroll_margin
< 0)
1873 this_scroll_margin
= 0;
1875 if (XINT (w
->height
) < 4 * scroll_margin
)
1876 this_scroll_margin
= XINT (w
->height
) / 4;
1878 if (PT
>= Z
- XFASTINT (w
->window_end_pos
))
1880 struct position pos
;
1881 pos
= *compute_motion (Z
- XFASTINT (w
->window_end_pos
), 0, 0, 0,
1882 PT
, XFASTINT (w
->height
), 0,
1883 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
1884 pos_tab_offset (w
, startp
), w
);
1885 if (pos
.vpos
> scroll_conservatively
)
1888 pos
= *vmotion (startp
, pos
.vpos
+ 1 + this_scroll_margin
, w
);
1890 if (! NILP (Vwindow_scroll_functions
))
1892 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
1893 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1894 make_number (pos
.bufpos
));
1895 pos
.bufpos
= marker_position (w
->start
);
1897 try_window (window
, pos
.bufpos
);
1898 if (cursor_vpos
>= 0)
1900 if (!just_this_one
|| current_buffer
->clip_changed
1901 || beg_unchanged
< startp
)
1902 /* Forget any recorded base line for line number display. */
1903 w
->base_line_number
= Qnil
;
1907 cancel_my_columns (w
);
1911 struct position pos
;
1912 pos
= *compute_motion (PT
, 0, 0, 0,
1913 startp
, XFASTINT (w
->height
), 0,
1914 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
1915 pos_tab_offset (w
, startp
), w
);
1916 if (pos
.vpos
>= scroll_conservatively
)
1919 pos
= *vmotion (startp
, - pos
.vpos
- this_scroll_margin
, w
);
1921 if (! NILP (Vwindow_scroll_functions
))
1923 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
1924 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1925 make_number (pos
.bufpos
));
1926 pos
.bufpos
= marker_position (w
->start
);
1928 try_window (window
, pos
.bufpos
);
1929 if (cursor_vpos
>= 0)
1931 if (!just_this_one
|| current_buffer
->clip_changed
1932 || beg_unchanged
< startp
)
1933 /* Forget any recorded base line for line number display. */
1934 w
->base_line_number
= Qnil
;
1938 cancel_my_columns (w
);
1943 if (scroll_step
&& !current_buffer
->clip_changed
1944 && startp
>= BEGV
&& startp
<= ZV
)
1948 pos
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), scroll_step
, w
);
1949 if (pos
.vpos
>= height
)
1953 pos
= *vmotion (startp
, (PT
< startp
? - scroll_step
: scroll_step
), w
);
1955 if (PT
>= pos
.bufpos
)
1957 if (! NILP (Vwindow_scroll_functions
))
1959 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
1960 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1961 make_number (pos
.bufpos
));
1962 pos
.bufpos
= marker_position (w
->start
);
1964 try_window (window
, pos
.bufpos
);
1965 if (cursor_vpos
>= 0)
1967 if (!just_this_one
|| current_buffer
->clip_changed
1968 || beg_unchanged
< startp
)
1969 /* Forget any recorded base line for line number display. */
1970 w
->base_line_number
= Qnil
;
1974 cancel_my_columns (w
);
1979 /* Finally, just choose place to start which centers point */
1982 /* Forget any previously recorded base line for line number display. */
1983 w
->base_line_number
= Qnil
;
1985 pos
= *vmotion (PT
, - (height
/ 2), w
);
1986 /* Set startp here explicitly in case that helps avoid an infinite loop
1987 in case the window-scroll-functions functions get errors. */
1988 Fset_marker (w
->start
, make_number (pos
.bufpos
), Qnil
);
1989 if (! NILP (Vwindow_scroll_functions
))
1991 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1992 make_number (pos
.bufpos
));
1993 pos
.bufpos
= marker_position (w
->start
);
1995 try_window (window
, pos
.bufpos
);
1997 startp
= marker_position (w
->start
);
1998 w
->start_at_line_beg
1999 = (startp
== BEGV
|| FETCH_BYTE (startp
- 1) == '\n') ? Qt
: Qnil
;
2002 if ((update_mode_line
2003 /* If window not full width, must redo its mode line
2004 if the window to its side is being redone */
2005 || (!just_this_one
&& !WINDOW_FULL_WIDTH_P (w
))
2006 || INTEGERP (w
->base_line_pos
)
2007 || (!NILP (w
->column_number_displayed
)
2008 && XFASTINT (w
->column_number_displayed
) != current_column ()))
2009 && height
!= XFASTINT (w
->height
))
2010 display_mode_line (w
);
2011 if (! line_number_displayed
2012 && ! BUFFERP (w
->base_line_pos
))
2014 w
->base_line_pos
= Qnil
;
2015 w
->base_line_number
= Qnil
;
2018 /* When we reach a frame's selected window, redo the frame's menu bar. */
2019 if (update_mode_line
2020 && (FRAME_WINDOW_P (f
)
2022 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
2023 FRAME_EXTERNAL_MENU_BAR (f
)
2025 FRAME_MENU_BAR_LINES (f
) > 0
2027 : FRAME_MENU_BAR_LINES (f
) > 0)
2028 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
2029 display_menu_bar (w
);
2032 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2034 int start
, end
, whole
;
2036 /* Calculate the start and end positions for the current window.
2037 At some point, it would be nice to choose between scrollbars
2038 which reflect the whole buffer size, with special markers
2039 indicating narrowing, and scrollbars which reflect only the
2042 Note that minibuffers sometimes aren't displaying any text. */
2043 if (! MINI_WINDOW_P (w
)
2044 || (w
== XWINDOW (minibuf_window
) && ! echo_area_glyphs
))
2047 start
= marker_position (w
->start
) - BEGV
;
2048 /* I don't think this is guaranteed to be right. For the
2049 moment, we'll pretend it is. */
2050 end
= (Z
- XINT (w
->window_end_pos
)) - BEGV
;
2052 if (end
< start
) end
= start
;
2053 if (whole
< (end
- start
)) whole
= end
- start
;
2056 start
= end
= whole
= 0;
2058 /* Indicate what this scroll bar ought to be displaying now. */
2059 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
2061 /* Note that we actually used the scroll bar attached to this window,
2062 so it shouldn't be deleted at the end of redisplay. */
2063 (*redeem_scroll_bar_hook
) (w
);
2066 BUF_PT (current_buffer
) = opoint
;
2067 if (update_mode_line
)
2068 set_buffer_internal_1 (old
);
2070 set_buffer_temp (old
);
2071 BUF_PT (current_buffer
) = lpoint
;
2074 /* Do full redisplay on one window, starting at position `pos'. */
2077 try_window (window
, pos
)
2081 register struct window
*w
= XWINDOW (window
);
2082 register int height
= window_internal_height (w
);
2083 register int vpos
= XFASTINT (w
->top
);
2084 register int last_text_vpos
= vpos
;
2085 FRAME_PTR f
= XFRAME (w
->frame
);
2086 int width
= window_internal_width (w
) - 1;
2087 struct position val
;
2089 /* POS should never be out of range! */
2090 if (pos
< XBUFFER (w
->buffer
)->begv
2091 || pos
> XBUFFER (w
->buffer
)->zv
)
2094 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2096 overlay_arrow_seen
= 0;
2097 zv_strings_seen
= 0;
2098 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
2099 val
.ovstring_chars_done
= 0;
2100 val
.tab_offset
= pos_tab_offset (w
, pos
);
2102 while (--height
>= 0)
2104 val
= *display_text_line (w
, pos
, vpos
, val
.hpos
, val
.tab_offset
,
2105 val
.ovstring_chars_done
);
2106 /* The following code is omitted because we maintain tab_offset
2109 tab_offset
+= width
;
2110 if (val
.vpos
) tab_offset
= 0;
2113 if (pos
!= val
.bufpos
)
2116 #ifdef USE_TEXT_PROPERTIES
2117 Lisp_Object invis_prop
;
2118 invis_prop
= Fget_char_property (val
.bufpos
-1, Qinvisible
, window
);
2119 invis
= TEXT_PROP_MEANS_INVISIBLE (invis_prop
);
2123 /* Next line, unless prev line ended in end of buffer with no cr */
2125 && (FETCH_BYTE (val
.bufpos
- 1) != '\n' || invis
));
2130 /* If last line is continued in middle of character,
2131 include the split character in the text considered on the frame */
2132 if (val
.hpos
< (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
2135 /* If bottom just moved off end of frame, change mode line percentage. */
2136 if (XFASTINT (w
->window_end_pos
) == 0
2138 w
->update_mode_line
= Qt
;
2140 /* Say where last char on frame will be, once redisplay is finished. */
2141 XSETFASTINT (w
->window_end_pos
, Z
- pos
);
2142 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
- XFASTINT (w
->top
));
2143 /* But that is not valid info until redisplay finishes. */
2144 w
->window_end_valid
= Qnil
;
2147 /* Try to redisplay when buffer is modified locally,
2148 computing insert/delete line to preserve text outside
2149 the bounds of the changes.
2150 Return 1 if successful, 0 if if cannot tell what to do,
2151 or -1 to tell caller to find a new window start,
2152 or -2 to tell caller to do normal redisplay with same window start. */
2155 try_window_id (window
)
2159 register struct window
*w
= XWINDOW (window
);
2160 register int height
= window_internal_height (w
);
2161 FRAME_PTR f
= XFRAME (w
->frame
);
2162 int top
= XFASTINT (w
->top
);
2163 int start
= marker_position (w
->start
);
2164 int width
= window_internal_width (w
) - 1;
2165 int hscroll
= XINT (w
->hscroll
);
2166 int lmargin
= hscroll
> 0 ? 1 - hscroll
: 0;
2169 register int i
, tem
;
2170 int last_text_vpos
= 0;
2172 int selective
= (INTEGERP (current_buffer
->selective_display
)
2173 ? XINT (current_buffer
->selective_display
)
2174 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2176 struct position val
, bp
, ep
, xp
, pp
;
2177 int scroll_amount
= 0;
2181 if (GPT
- BEG
< beg_unchanged
)
2182 beg_unchanged
= GPT
- BEG
;
2183 if (Z
- GPT
< end_unchanged
)
2184 end_unchanged
= Z
- GPT
;
2186 if (beg_unchanged
+ BEG
< start
)
2187 return 0; /* Give up if changes go above top of window */
2189 /* Find position before which nothing is changed. */
2190 bp
= *compute_motion (start
, 0, lmargin
, 0,
2191 min (ZV
, beg_unchanged
+ BEG
), height
,
2192 /* BUG FIX: See the comment of
2193 Fpos_visible_in_window_p() (window.c). */
2194 - (1 << (BITS_PER_SHORT
- 1)),
2195 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2196 if (bp
.vpos
>= height
)
2200 /* All changes are beyond the window end, and point is on the screen.
2201 We don't need to change the text at all.
2202 But we need to update window_end_pos to account for
2203 any change in buffer size. */
2204 bp
= *compute_motion (start
, 0, lmargin
, 0,
2206 /* BUG FIX: See the comment of
2207 Fpos_visible_in_window_p() (window.c). */
2208 - (1 << (BITS_PER_SHORT
- 1)),
2209 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2210 XSETFASTINT (w
->window_end_vpos
, height
);
2211 XSETFASTINT (w
->window_end_pos
, Z
- bp
.bufpos
);
2219 /* Find beginning of that frame line. Must display from there. */
2220 bp
= *vmotion (bp
.bufpos
, 0, w
);
2228 /* If about to start displaying at the beginning of a continuation line,
2229 really start with previous frame line, in case it was not
2230 continued when last redisplayed */
2231 if ((bp
.contin
&& bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0)
2233 /* Likewise if we have to worry about selective display. */
2234 (selective
> 0 && bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0))
2236 bp
= *vmotion (bp
.bufpos
, -1, w
);
2240 val
.tab_offset
= bp
.tab_offset
; /* Update tab offset. */
2242 if (bp
.contin
&& bp
.hpos
!= lmargin
)
2244 val
.hpos
= bp
.prevhpos
- width
+ lmargin
;
2245 val
.tab_offset
= bp
.tab_offset
+ bp
.prevhpos
- width
;
2252 /* Find first visible newline after which no more is changed. */
2253 tem
= find_next_newline (Z
- max (end_unchanged
, Z
- ZV
), 1);
2255 while (tem
< ZV
- 1 && (indented_beyond_p (tem
, selective
)))
2256 tem
= find_next_newline (tem
, 1);
2258 /* Compute the cursor position after that newline. */
2259 ep
= *compute_motion (pos
, vpos
, val
.hpos
, did_motion
, tem
,
2260 height
, - (1 << (BITS_PER_SHORT
- 1)),
2262 /* We have tab offset in VAL, use it. */
2265 /* If changes reach past the text available on the frame,
2266 just display rest of frame. */
2267 if (ep
.bufpos
> Z
- XFASTINT (w
->window_end_pos
))
2270 stop_vpos
= ep
.vpos
;
2272 /* If no newline before ep, the line ep is on includes some changes
2273 that must be displayed. Make sure we don't stop before it. */
2274 /* Also, if changes reach all the way until ep.bufpos,
2275 it is possible that something was deleted after the
2276 newline before it, so the following line must be redrawn. */
2277 if (stop_vpos
== ep
.vpos
2278 && (ep
.bufpos
== BEGV
2279 || FETCH_BYTE (ep
.bufpos
- 1) != '\n'
2280 || ep
.bufpos
== Z
- end_unchanged
))
2281 stop_vpos
= ep
.vpos
+ 1;
2284 overlay_arrow_seen
= 0;
2285 zv_strings_seen
= 0;
2287 /* If changes do not reach to bottom of window,
2288 figure out how much to scroll the rest of the window */
2289 if (stop_vpos
< height
)
2291 /* Now determine how far up or down the rest of the window has moved */
2292 xp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2293 Z
- XFASTINT (w
->window_end_pos
),
2294 /* Don't care for VPOS... */
2295 1 << (BITS_PER_SHORT
- 1),
2297 1 << (BITS_PER_SHORT
- 1),
2298 width
, hscroll
, ep
.tab_offset
, w
);
2299 scroll_amount
= xp
.vpos
- XFASTINT (w
->window_end_vpos
);
2301 /* Is everything on frame below the changes whitespace?
2302 If so, no scrolling is really necessary. */
2303 for (i
= ep
.bufpos
; i
< xp
.bufpos
; i
++)
2305 tem
= FETCH_BYTE (i
);
2306 if (tem
!= ' ' && tem
!= '\n' && tem
!= '\t')
2312 XSETFASTINT (w
->window_end_vpos
,
2313 XFASTINT (w
->window_end_vpos
) + scroll_amount
);
2315 /* Before doing any scrolling, verify that point will be on frame. */
2316 if (PT
> ep
.bufpos
&& !(PT
<= xp
.bufpos
&& xp
.vpos
< height
))
2318 if (PT
<= xp
.bufpos
)
2320 pp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2321 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2323 /* We have tab offset in EP, use it. */
2328 pp
= *compute_motion (xp
.bufpos
, xp
.vpos
, xp
.hpos
, 1,
2329 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2331 /* We have tab offset in XP, use it. */
2334 if (pp
.bufpos
< PT
|| pp
.vpos
== height
)
2336 cursor_vpos
= pp
.vpos
+ top
;
2337 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, pp
.hpos
, width
);
2340 if (stop_vpos
- scroll_amount
>= height
2341 || ep
.bufpos
== xp
.bufpos
)
2343 if (scroll_amount
< 0)
2344 stop_vpos
-= scroll_amount
;
2346 /* In this path, we have altered window_end_vpos
2347 and not left it negative.
2348 We must make sure that, in case display is preempted
2349 before the frame changes to reflect what we do here,
2350 further updates will not come to try_window_id
2351 and assume the frame and window_end_vpos match. */
2352 blank_end_of_window
= 1;
2354 else if (!scroll_amount
)
2356 /* Even if we don't need to scroll, we must adjust the
2357 charstarts of subsequent lines (that we won't redisplay)
2358 according to the amount of text inserted or deleted. */
2359 int oldpos
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2360 int adjust
= ep
.bufpos
- oldpos
;
2361 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1, adjust
);
2363 else if (bp
.bufpos
== Z
- end_unchanged
)
2365 /* If reprinting everything is nearly as fast as scrolling,
2366 don't bother scrolling. Can happen if lines are short. */
2367 if (scroll_cost (f
, bp
.vpos
+ top
- scroll_amount
,
2368 top
+ height
- max (0, scroll_amount
),
2370 > xp
.bufpos
- bp
.bufpos
- 20)
2371 /* Return "try normal display with same window-start."
2372 Too bad we can't prevent further scroll-thinking. */
2374 /* If pure deletion, scroll up as many lines as possible.
2375 In common case of killing a line, this can save the
2376 following line from being overwritten by scrolling
2377 and therefore having to be redrawn. */
2378 tem
= scroll_frame_lines (f
, bp
.vpos
+ top
- scroll_amount
,
2379 top
+ height
- max (0, scroll_amount
),
2380 scroll_amount
, bp
.bufpos
);
2385 /* scroll_frame_lines did not properly adjust subsequent
2386 lines' charstarts in the case where the text of the
2387 screen line at bp.vpos has changed.
2388 (This can happen in a deletion that ends in mid-line.)
2389 To adjust properly, we need to make things consistent
2391 So do a second adjust to make that happen.
2392 Note that stop_vpos >= ep.vpos, so it is sufficient
2393 to update the charstarts for lines at ep.vpos and below. */
2395 = FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2396 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1,
2397 ep
.bufpos
- oldstart
);
2400 else if (scroll_amount
)
2402 /* If reprinting everything is nearly as fast as scrolling,
2403 don't bother scrolling. Can happen if lines are short. */
2404 /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an
2405 overestimate of cost of reprinting, since xp.bufpos
2406 would end up below the bottom of the window. */
2407 if (scroll_cost (f
, ep
.vpos
+ top
- scroll_amount
,
2408 top
+ height
- max (0, scroll_amount
),
2410 > xp
.bufpos
- ep
.bufpos
- 20)
2411 /* Return "try normal display with same window-start."
2412 Too bad we can't prevent further scroll-thinking. */
2414 tem
= scroll_frame_lines (f
, ep
.vpos
+ top
- scroll_amount
,
2415 top
+ height
- max (0, scroll_amount
),
2416 scroll_amount
, ep
.bufpos
);
2417 if (!tem
) stop_vpos
= height
;
2421 /* In any case, do not display past bottom of window */
2422 if (stop_vpos
>= height
)
2428 /* Handle case where pos is before w->start --
2429 can happen if part of line had been clipped and is not clipped now */
2430 if (vpos
== 0 && pos
< marker_position (w
->start
))
2431 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2433 /* Redisplay the lines where the text was changed */
2434 last_text_vpos
= vpos
;
2435 /* The following code is omitted because we maintain tab offset in
2438 tab_offset
= pos_tab_offset (w
, pos
);
2439 /* If we are starting display in mid-character, correct tab_offset
2440 to account for passing the line that that character really starts in. */
2441 if (val
.hpos
< lmargin
)
2442 tab_offset
+= width
;
2445 while (vpos
< stop_vpos
)
2447 val
= *display_text_line (w
, pos
, top
+ vpos
++, val
.hpos
, val
.tab_offset
,
2448 val
.ovstring_chars_done
);
2449 /* If display_text_line ran a hook and changed some text,
2450 redisplay all the way to bottom of buffer
2451 So that we show the changes. */
2452 if (old_tick
!= MODIFF
)
2454 /* The following code is omitted because we maintain tab offset
2455 in val.tab_offset. */
2457 tab_offset
+= width
;
2458 if (val
.vpos
) tab_offset
= 0;
2460 if (pos
!= val
.bufpos
)
2462 /* Next line, unless prev line ended in end of buffer with no cr */
2463 = vpos
- (val
.vpos
&& FETCH_BYTE (val
.bufpos
- 1) != '\n');
2467 /* There are two cases:
2468 1) we have displayed down to the bottom of the window
2469 2) we have scrolled lines below stop_vpos by scroll_amount */
2473 /* If last line is continued in middle of character,
2474 include the split character in the text considered on the frame */
2475 if (val
.hpos
< lmargin
)
2477 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
);
2478 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2481 /* If scrolling made blank lines at window bottom,
2482 redisplay to fill those lines */
2483 if (scroll_amount
< 0)
2485 /* Don't consider these lines for general-purpose scrolling.
2486 That will save time in the scrolling computation. */
2487 FRAME_SCROLL_BOTTOM_VPOS (f
) = xp
.vpos
;
2491 val
.tab_offset
= xp
.tab_offset
;
2493 { /* Display from next line */
2494 vpos
= height
+ scroll_amount
;
2498 else if (xp
.contin
&& xp
.hpos
!= lmargin
)
2500 val
.hpos
= xp
.prevhpos
- width
+ lmargin
;
2501 val
.tab_offset
= xp
.tab_offset
+ bp
.prevhpos
- width
;
2505 blank_end_of_window
= 1;
2506 /* The following code is omitted because we maintain tab offset
2507 in val.tab_offset. */
2509 tab_offset
= pos_tab_offset (w
, pos
);
2510 /* If we are starting display in mid-character, correct tab_offset
2511 to account for passing the line that that character starts in. */
2512 if (val
.hpos
< lmargin
)
2513 tab_offset
+= width
;
2515 while (vpos
< height
)
2517 val
= *display_text_line (w
, pos
, top
+ vpos
++, val
.hpos
,
2518 val
.tab_offset
, val
.ovstring_chars_done
);
2519 /* The following code is omitted because we maintain tab
2520 offset in val.tab_offset. */
2522 tab_offset
+= width
;
2523 if (val
.vpos
) tab_offset
= 0;
2528 /* Here is a case where display_text_line sets cursor_vpos wrong.
2529 Make it be fixed up, below. */
2535 /* If bottom just moved off end of frame, change mode line percentage. */
2536 if (XFASTINT (w
->window_end_pos
) == 0
2538 w
->update_mode_line
= Qt
;
2540 /* Attempt to adjust end-of-text positions to new bottom line */
2543 delta
= height
- xp
.vpos
;
2545 || (delta
> 0 && xp
.bufpos
<= ZV
)
2546 || (delta
== 0 && xp
.hpos
))
2548 val
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), delta
, w
);
2549 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2550 XSETFASTINT (w
->window_end_vpos
,
2551 XFASTINT (w
->window_end_vpos
) + val
.vpos
);
2555 w
->window_end_valid
= Qnil
;
2557 /* If point was not in a line that was displayed, find it */
2558 if (cursor_vpos
< 0)
2561 val
= *compute_motion (start
, 0, lmargin
, 0, PT
,
2562 /* Don't care for VPOS... */
2563 1 << (BITS_PER_SHORT
- 1),
2565 1 << (BITS_PER_SHORT
- 1),
2566 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2567 /* Admit failure if point is off frame now */
2568 if (val
.vpos
>= height
)
2570 for (vpos
= 0; vpos
< height
; vpos
++)
2571 cancel_line (vpos
+ top
, f
);
2574 cursor_vpos
= val
.vpos
+ top
;
2575 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, val
.hpos
, width
);
2578 FRAME_CURSOR_X (f
) = cursor_hpos
;
2579 FRAME_CURSOR_Y (f
) = cursor_vpos
;
2583 val
= *compute_motion (start
, 0, lmargin
, 0, ZV
,
2584 height
, - (1 << (BITS_PER_SHORT
- 1)),
2585 width
, hscroll
, pos_tab_offset (w
, start
), w
);
2586 if (val
.vpos
!= XFASTINT (w
->window_end_vpos
))
2588 if (XFASTINT (w
->window_end_pos
)
2596 /* Copy LEN glyphs starting address FROM to the rope TO.
2597 But don't actually copy the parts that would come in before S.
2598 Value is TO, advanced past the copied data.
2599 F is the frame we are displaying in. */
2602 copy_part_of_rope (f
, to
, s
, from
, len
, face
)
2604 register GLYPH
*to
; /* Copy to here. */
2605 register GLYPH
*s
; /* Starting point. */
2606 Lisp_Object
*from
; /* Data to copy. */
2608 int face
; /* Face to apply to glyphs which don't specify one. */
2611 register Lisp_Object
*fp
= from
;
2612 /* These cache the results of the last call to compute_glyph_face. */
2614 int last_merged
= 0;
2617 if (! FRAME_TERMCAP_P (f
))
2620 GLYPH glyph
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
2622 unsigned int c
= FAST_GLYPH_CHAR (glyph
);
2625 /* For an invalid character code, use space. */
2628 if (FAST_GLYPH_FACE (glyph
) == 0)
2629 /* If GLYPH has no face code, use FACE. */
2631 else if (FAST_GLYPH_FACE (glyph
) == last_code
)
2632 /* If it's same as previous glyph, use same result. */
2633 facecode
= last_merged
;
2636 /* Merge this glyph's face and remember the result. */
2637 last_code
= FAST_GLYPH_FACE (glyph
);
2638 last_merged
= facecode
= compute_glyph_face (f
, last_code
, face
);
2642 *to
= FAST_MAKE_GLYPH (c
, facecode
);
2650 if (to
>= s
) *to
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
2657 /* Correct a glyph by replacing its specified user-level face code
2658 with a displayable computed face code. */
2661 fix_glyph (f
, glyph
, cface
)
2667 if (! FRAME_TERMCAP_P (f
))
2669 if (FAST_GLYPH_FACE (glyph
) != 0)
2670 cface
= compute_glyph_face (f
, FAST_GLYPH_FACE (glyph
), cface
);
2671 glyph
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), cface
);
2677 /* Display one line of window W, starting at position START in W's buffer.
2679 Display starting at horizontal position HPOS, expressed relative to
2680 W's left edge. In situations where the text at START shouldn't
2681 start at the left margin (i.e. when the window is hscrolled, or
2682 we're continuing a line which left off in the midst of a
2683 multi-column character), HPOS should be negative; we throw away
2684 characters up 'til hpos = 0. So, HPOS must take hscrolling into
2687 TABOFFSET is an offset for ostensible hpos, used in tab stop calculations.
2689 OVSTR_DONE is the number of chars of overlay before/after strings
2690 at this position which have already been processed.
2692 Display on position VPOS on the frame. It is origin 0, relative to
2693 the top of the frame, not W.
2695 Returns a STRUCT POSITION giving character to start next line with
2696 and where to display it, including a zero or negative hpos.
2697 The vpos field is not really a vpos; it is 1 unless the line is continued */
2699 struct position val_display_text_line
;
2701 static struct position
*
2702 display_text_line (w
, start
, vpos
, hpos
, taboffset
, ovstr_done
)
2710 register int pos
= start
;
2714 register unsigned char *p
;
2716 register GLYPH
*leftmargin
;
2717 register GLYPH
*p1prev
;
2718 register GLYPH
*p1start
;
2721 FRAME_PTR f
= XFRAME (w
->frame
);
2722 int tab_width
= XINT (current_buffer
->tab_width
);
2723 int ctl_arrow
= !NILP (current_buffer
->ctl_arrow
);
2724 int width
= window_internal_width (w
) - 1;
2725 struct position val
;
2728 int last_invis_skip
= 0;
2729 Lisp_Object last_invis_prop
;
2730 int hscroll
= XINT (w
->hscroll
);
2731 int truncate
= (hscroll
2732 || (truncate_partial_width_windows
2733 && !WINDOW_FULL_WIDTH_P (w
))
2734 || !NILP (current_buffer
->truncate_lines
));
2736 /* 1 if we should highlight the region. */
2737 int highlight_region
2738 = (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
)
2739 && XWINDOW (current_buffer
->last_selected_window
) == w
);
2740 int region_beg
, region_end
;
2742 int selective
= (INTEGERP (current_buffer
->selective_display
)
2743 ? XINT (current_buffer
->selective_display
)
2744 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2745 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
2746 register struct Lisp_Char_Table
*dp
= window_display_table (w
);
2748 Lisp_Object default_invis_vector
[3];
2749 /* Number of characters of ellipsis to display after an invisible line
2750 if it calls for an ellipsis.
2751 Note that this value can be nonzero regardless of whether
2752 selective display is enabled--you must check that separately. */
2754 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
2755 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->size
2756 : !NILP (current_buffer
->selective_display_ellipses
) ? 3 : 0);
2757 /* This is the sequence of Lisp objects to display
2758 when there are invisible lines. */
2759 Lisp_Object
*invis_vector_contents
2760 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
2761 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->contents
2762 : default_invis_vector
);
2764 GLYPH truncator
= (dp
== 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp
))
2765 || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp
)))
2766 ? '$' : XINT (DISP_TRUNC_GLYPH (dp
)));
2767 GLYPH continuer
= (dp
== 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp
))
2768 || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp
)))
2769 ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp
)));
2771 /* If 1, we must handle multibyte characters. */
2772 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
2773 /* Length of multibyte form of each character. */
2775 /* Glyphs generated should be set this bit mask if text must be
2776 displayed from right to left. */
2777 GLYPH rev_dir_bit
= (NILP (current_buffer
->direction_reversed
)
2778 ? 0 : GLYPH_MASK_REV_DIR
);
2780 /* The next buffer location at which the face should change, due
2781 to overlays or text property changes. */
2782 int next_face_change
;
2784 /* The next location where the `invisible' property changes, or an
2785 overlay starts or ends. */
2788 /* The face we're currently using. */
2789 int current_face
= 0;
2792 XSETFASTINT (default_invis_vector
[2], '.');
2793 default_invis_vector
[0] = default_invis_vector
[1] = default_invis_vector
[2];
2795 hpos
+= WINDOW_LEFT_MARGIN (w
);
2796 get_display_line (f
, vpos
, WINDOW_LEFT_MARGIN (w
));
2797 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
2799 /* Show where to highlight the region. */
2800 if (highlight_region
&& XMARKER (current_buffer
->mark
)->buffer
!= 0
2801 /* Maybe highlight only in selected window. */
2802 && (highlight_nonselected_windows
2803 || w
== XWINDOW (selected_window
)))
2805 region_beg
= marker_position (current_buffer
->mark
);
2806 if (PT
< region_beg
)
2808 region_end
= region_beg
;
2813 w
->region_showing
= Qt
;
2816 region_beg
= region_end
= -1;
2818 if (MINI_WINDOW_P (w
)
2820 && vpos
== XFASTINT (w
->top
))
2822 if (! NILP (minibuf_prompt
))
2824 minibuf_prompt_width
2825 = (display_string (w
, vpos
, XSTRING (minibuf_prompt
)->data
,
2826 XSTRING (minibuf_prompt
)->size
, hpos
,
2827 /* Display a space if we truncate. */
2830 /* Truncate the prompt a little before the
2831 margin, so user input can at least start
2832 on the first line. */
2833 w
->width
> 10 ? w
->width
- 4 : -1)
2835 hpos
+= minibuf_prompt_width
;
2836 taboffset
-= minibuf_prompt_width
;
2839 minibuf_prompt_width
= 0;
2842 /* If we're hscrolled at all, use compute_motion to skip over any
2843 text off the left edge of the window. compute_motion may know
2844 tricks to do this faster than we can. */
2847 struct position
*left_edge
2848 = compute_motion (pos
, vpos
, hpos
, 0,
2850 width
, hscroll
, taboffset
, w
);
2852 /* Retrieve the buffer position and column provided by
2853 compute_motion. We can't assume that the column will be
2854 zero, because you may have multi-column characters crossing
2857 compute_motion may have moved us past the screen position we
2858 requested, if we hit a multi-column character, or the end of
2859 the line. If so, back up. */
2860 if (left_edge
->vpos
> vpos
2861 || left_edge
->hpos
> 0)
2863 pos
= left_edge
->bufpos
;
2864 /* Since this should not be a valid multibyte character, we
2865 can decrease POS by 1. */
2867 hpos
= left_edge
->prevhpos
;
2871 pos
= left_edge
->bufpos
;
2872 hpos
= left_edge
->hpos
;
2876 desired_glyphs
->bufp
[vpos
] = start
;
2877 p1
= desired_glyphs
->glyphs
[vpos
] + hpos
;
2879 charstart
= desired_glyphs
->charstarts
[vpos
] + hpos
;
2880 /* In case we don't ever write anything into it... */
2881 desired_glyphs
->charstarts
[vpos
][WINDOW_LEFT_MARGIN (w
)] = -1;
2882 leftmargin
= desired_glyphs
->glyphs
[vpos
] + WINDOW_LEFT_MARGIN (w
);
2883 endp
= leftmargin
+ width
;
2885 /* Arrange the overlays nicely for our purposes. Usually, we call
2886 display_text_line on only one line at a time, in which case this
2887 can't really hurt too much, or we call it on lines which appear
2888 one after another in the buffer, in which case all calls to
2889 recenter_overlay_lists but the first will be pretty cheap. */
2890 recenter_overlay_lists (current_buffer
, pos
);
2892 /* Loop generating characters.
2893 Stop at end of buffer, before newline,
2894 if reach or pass continuation column,
2895 or at face change. */
2897 next_face_change
= pos
;
2898 next_boundary
= pos
;
2907 while (pos
== next_boundary
)
2909 Lisp_Object position
, limit
, prop
, ww
;
2911 /* Display the overlay strings here, unless we're at ZV
2912 and have already displayed the appropriate strings
2913 on an earlier line. */
2914 if (pos
< ZV
|| !zv_strings_seen
++)
2917 unsigned char *ovstr
;
2918 ovlen
= overlay_strings (pos
, w
, &ovstr
);
2922 /* Skip the ones we did in a previous line. */
2923 ovstr
+= ovstr_done
;
2924 ovlen
-= ovstr_done
;
2933 c
= STRING_CHAR_AND_LENGTH (ovstr
, ovlen
, len
);
2934 ovstr
+= len
, ovlen
-= len
, ovstr_done
+= len
;
2935 charset
= CHAR_CHARSET (c
);
2936 cols
= (charset
== CHARSET_COMPOSITION
2937 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
2938 : CHARSET_WIDTH (charset
));
2942 c
= *ovstr
++, ovlen
--, ovstr_done
++;
2945 g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
2948 if (p1
>= leftmargin
&& p1
< endp
)
2949 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
2953 /* If we did all the overlay strings
2954 and we have room for text, clear ovstr_done
2955 just for neatness' sake. */
2956 if (ovlen
== 0 && p1
< endp
)
2961 /* Did we reach point? Record the cursor location. */
2962 if (pos
== PT
&& cursor_vpos
< 0)
2965 cursor_hpos
= p1
- leftmargin
;
2971 XSETFASTINT (position
, pos
);
2972 limit
= Fnext_overlay_change (position
);
2973 #ifdef USE_TEXT_PROPERTIES
2974 /* This is just an estimate to give reasonable
2975 performance; nothing should go wrong if it is too small. */
2976 if (XFASTINT (limit
) > pos
+ 50)
2978 int limitpos
= pos
+ 50;
2980 INC_POS (limitpos
); /* Adjust to character boundary. */
2981 XSETFASTINT (limit
, limitpos
);
2983 limit
= Fnext_single_property_change (position
, Qinvisible
,
2984 Fcurrent_buffer (), limit
);
2986 next_boundary
= XFASTINT (limit
);
2987 /* if the `invisible' property is set, we can skip to
2988 the next property change. */
2990 prop
= Fget_char_property (position
, Qinvisible
, ww
);
2991 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
2993 if (pos
< PT
&& next_boundary
>= PT
)
2996 cursor_hpos
= p1
- leftmargin
;
2998 pos
= next_boundary
;
2999 last_invis_skip
= pos
;
3000 last_invis_prop
= prop
;
3004 /* Did we reach point? Record the cursor location. */
3005 if (pos
== PT
&& cursor_vpos
< 0)
3008 cursor_hpos
= p1
- leftmargin
;
3011 /* Did we hit the end of the visible region of the buffer?
3015 /* Update charstarts for the end of this line. */
3016 /* Do nothing if off the left edge or at the right edge. */
3017 if (p1
>= leftmargin
&& p1
+ 1 != endp
)
3019 int *p2x
= &charstart
[(p1
< leftmargin
3027 /* Figure out where (if at all) the
3028 redisplay_end_trigger-hook should run. */
3029 if (MARKERP (w
->redisplay_end_trigger
)
3030 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
3031 e_t_h
= marker_position (w
->redisplay_end_trigger
);
3032 else if (INTEGERP (w
->redisplay_end_trigger
))
3033 e_t_h
= XINT (w
->redisplay_end_trigger
);
3037 /* If we've gone past the place to run a hook,
3039 if (pos
>= e_t_h
&& e_t_h
!= ZV
)
3041 Lisp_Object args
[3];
3043 args
[0] = Qredisplay_end_trigger_functions
;
3044 XSETWINDOW (args
[1], w
);
3045 XSETINT (args
[2], e_t_h
);
3047 /* Since we are *trying* to run these functions,
3048 don't try to run them again, even if they get an error. */
3049 w
->redisplay_end_trigger
= Qnil
;
3050 Frun_hook_with_args (3, args
);
3053 /* Notice if it changed the face of this character. */
3054 next_face_change
= pos
;
3058 /* Did we hit a face change? Figure out what face we should
3059 use now. We also hit this the first time through the
3060 loop, to see what face we should start with. */
3061 if (pos
>= next_face_change
3062 && (FRAME_WINDOW_P (f
) || FRAME_MSDOS_P (f
)))
3064 int limit
= pos
+ 50;
3066 if (limit
< Z
&& !CHAR_HEAD_P (POS_ADDR (limit
)))
3067 INC_POS (limit
); /* Adjust to character boundary. */
3068 current_face
= compute_char_face (f
, w
, pos
,
3069 region_beg
, region_end
,
3070 &next_face_change
, limit
, 0);
3074 /* Compute the next place we need to stop
3075 and do something special; set PAUSE. */
3079 if (pos
< next_boundary
&& next_boundary
< pause
)
3080 pause
= next_boundary
;
3081 if (pos
< next_face_change
&& next_face_change
< pause
)
3082 pause
= next_face_change
;
3087 /* Wouldn't you hate to read the next line to someone over
3089 if (pos
< PT
&& PT
< pause
)
3091 if (pos
< GPT
&& GPT
< pause
)
3103 /* PAUSE is surely at character boundary. */
3104 c
= STRING_CHAR_AND_LENGTH (p
, pause
- pos
, len
), p
+= len
;
3107 /* Let a display table override all standard display methods. */
3108 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
3110 p1
= copy_part_of_rope (f
, p1
, leftmargin
,
3111 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
3112 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
3113 current_face
, rev_dir_bit
);
3115 else if (c
>= 040 && c
< 0177)
3117 if (p1
>= leftmargin
)
3118 *p1
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3124 if (last_invis_skip
== pos
3125 && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop
))
3129 && indented_beyond_p (pos
+ 1, selective
))
3132 pos
= find_next_newline (pos
+ 1, 1);
3133 if (FETCH_BYTE (pos
- 1) == '\n')
3136 if (invis
&& selective_rlen
> 0 && p1
>= leftmargin
)
3138 p1
+= selective_rlen
;
3139 if (p1
- leftmargin
> width
)
3141 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3142 (p1
- p1prev
), current_face
, rev_dir_bit
);
3145 /* Draw the face of the newline character as extending all the
3146 way to the end of the frame line. */
3149 if (p1
< leftmargin
)
3152 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3156 /* Update charstarts for the newline that ended this line. */
3157 /* Do nothing here for a char that's entirely off the left edge
3158 or if it starts at the right edge. */
3159 if (p1
>= leftmargin
&& p1prev
!= endp
)
3161 /* Store the newline's position into charstarts
3162 for the column where the newline starts.
3163 Store -1 for the rest of the glyphs it occupies. */
3164 int *p2x
= &charstart
[(p1prev
< leftmargin
3165 ? leftmargin
: p1prev
)
3167 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3180 if (p1
>= leftmargin
&& p1
< endp
)
3181 *p1
= MAKE_GLYPH (f
, ' ', current_face
) | rev_dir_bit
;
3184 while ((p1
- leftmargin
+ taboffset
+ hscroll
- (hscroll
> 0))
3187 else if (c
== Ctl ('M') && selective
== -1)
3189 pos
= find_next_newline (pos
, 1);
3190 if (FETCH_BYTE (pos
- 1) == '\n')
3192 if (selective_rlen
> 0)
3194 p1
+= selective_rlen
;
3195 if (p1
- leftmargin
> width
)
3197 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3198 (p1
- p1prev
), current_face
, rev_dir_bit
);
3201 /* Draw the face of the newline character as extending all the
3202 way to the end of the frame line. */
3205 if (p1
< leftmargin
)
3208 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3212 /* Update charstarts for the ^M that ended this line. */
3213 /* Do nothing here for a char that's entirely off the left edge
3214 or if it starts at the right edge. */
3215 if (p1
>= leftmargin
&& p1prev
!= endp
)
3217 /* Store the newline's position into charstarts
3218 for the column where the newline starts.
3219 Store -1 for the rest of the glyphs it occupies. */
3220 int *p2x
= &charstart
[(p1prev
< leftmargin
3221 ? leftmargin
: p1prev
)
3223 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3231 else if (c
< 0200 && ctl_arrow
)
3233 if (p1
>= leftmargin
)
3235 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
3236 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
3237 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
3241 if (p1
>= leftmargin
&& p1
< endp
)
3242 *p1
= MAKE_GLYPH (f
, c
^ 0100, current_face
) | rev_dir_bit
;
3247 /* C is not a multibyte character. */
3248 if (p1
>= leftmargin
)
3250 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
3251 && GLYPH_CHAR_VALID_P (DISP_ESCAPE_GLYPH (dp
))
3252 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
3256 if (p1
>= leftmargin
&& p1
< endp
)
3257 *p1
= MAKE_GLYPH (f
, (c
>> 6) + '0', current_face
) | rev_dir_bit
;
3259 if (p1
>= leftmargin
&& p1
< endp
)
3260 *p1
= (MAKE_GLYPH (f
, (7 & (c
>> 3)) + '0', current_face
)
3263 if (p1
>= leftmargin
&& p1
< endp
)
3264 *p1
= MAKE_GLYPH (f
, (7 & c
) + '0', current_face
) | rev_dir_bit
;
3269 /* C is a multibyte character. */
3270 int charset
= CHAR_CHARSET (c
);
3271 int columns
= (charset
== CHARSET_COMPOSITION
3272 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3273 : CHARSET_WIDTH (charset
));
3274 GLYPH g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3278 if (p1
>= leftmargin
&& p1
< endp
)
3279 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3287 /* Update charstarts for the character just output. */
3289 /* Do nothing here for a char that's entirely off the left edge. */
3290 if (p1
>= leftmargin
)
3292 /* Store the char's position into charstarts
3293 for the first glyph occupied by this char.
3294 Store -1 for the rest of the glyphs it occupies. */
3297 int *p2x
= &charstart
[(p1prev
< leftmargin
3298 ? leftmargin
: p1prev
)
3300 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3310 val
.hpos
= - XINT (w
->hscroll
);
3318 /* Store 0 in this charstart line for the positions where
3319 there is no character. But do leave what was recorded
3320 for the character that ended the line. */
3321 /* Add 1 in the endtest to compensate for the fact that ENDP was
3322 made from WIDTH, which is 1 less than the window's actual
3324 i
= p1
- p1start
+ 1;
3325 if (p1
< leftmargin
)
3326 i
+= leftmargin
- p1
;
3327 for (; i
< endp
- p1start
+ 1; i
++)
3330 /* Handle continuation in middle of a character */
3331 /* by backing up over it */
3334 /* Don't back up if we never actually displayed any text.
3335 This occurs when the minibuffer prompt takes up the whole line. */
3338 /* Start the next line with that same character whose
3339 character code is C and the length of multi-byte form is
3344 /* C is not a multi-byte character. We can break it and
3345 start from the middle column in the next line. So,
3346 adjust VAL.HPOS to skip the columns output on this
3348 val
.hpos
+= p1prev
- endp
;
3351 /* C is a multibyte character. Since we can't broke it
3352 in the middle, the whole character should be driven
3353 into the next line. */
3354 /* As the result, the actual columns occupied by the
3355 text on this line is less than WIDTH. VAL.TAB_OFFSET
3356 must be adjusted. */
3357 taboffset
= taboffset
+ (p1prev
- endp
);
3358 /* Let's fill unused columns with TRUNCATOR or CONTINUER. */
3360 GLYPH g
= fix_glyph (f
, truncate
? truncator
: continuer
, 0);
3361 while (p1prev
< endp
)
3364 /* If POINT is at POS, cursor should not on this line. */
3371 /* Keep in this line everything up to the continuation column. */
3375 /* Finish deciding which character to start the next line on,
3376 and what hpos to start it at.
3377 Also set `lastpos' to the last position which counts as "on this line"
3378 for cursor-positioning. */
3382 if (FETCH_BYTE (pos
) == '\n')
3384 /* If stopped due to a newline, start next line after it */
3387 /* Check again for hidden lines, in case the newline occurred exactly
3388 at the right margin. */
3389 while (pos
< ZV
&& selective
> 0
3390 && indented_beyond_p (pos
, selective
))
3391 pos
= find_next_newline (pos
, 1);
3394 /* Stopped due to right margin of window */
3398 *p1
++ = fix_glyph (f
, truncator
, 0);
3399 /* Truncating => start next line after next newline,
3400 and point is on this line if it is before the newline,
3401 and skip none of first char of next line */
3403 pos
= find_next_newline (pos
, 1);
3404 while (pos
< ZV
&& selective
> 0
3405 && indented_beyond_p (pos
, selective
));
3406 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
3408 lastpos
= pos
- (FETCH_BYTE (pos
- 1) == '\n');
3413 *p1
++ = fix_glyph (f
, continuer
, 0);
3416 val
.tab_offset
= taboffset
+ width
;
3423 /* If point is at eol or in invisible text at eol,
3424 record its frame location now. */
3426 if (start
<= PT
&& PT
<= lastpos
&& cursor_vpos
< 0)
3429 cursor_hpos
= p1
- leftmargin
;
3432 if (cursor_vpos
== vpos
)
3434 if (cursor_hpos
< 0) cursor_hpos
= 0;
3435 if (cursor_hpos
> width
) cursor_hpos
= width
;
3436 cursor_hpos
+= WINDOW_LEFT_MARGIN (w
);
3437 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
3439 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (f
)
3440 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
)))
3442 FRAME_CURSOR_Y (f
) = cursor_vpos
;
3443 FRAME_CURSOR_X (f
) = cursor_hpos
;
3446 if (w
== XWINDOW (selected_window
))
3448 /* Line is not continued and did not start
3449 in middle of character */
3450 if ((hpos
- WINDOW_LEFT_MARGIN (w
)
3451 == (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
3454 this_line_bufpos
= start
;
3455 this_line_buffer
= current_buffer
;
3456 this_line_vpos
= cursor_vpos
;
3457 this_line_start_hpos
= hpos
;
3458 this_line_endpos
= Z
- lastpos
;
3461 this_line_bufpos
= 0;
3466 /* If hscroll and line not empty, insert truncation-at-left marker */
3467 if (hscroll
&& lastpos
!= start
)
3469 GLYPH g
= fix_glyph (f
, truncator
, 0);
3471 if (p1
<= leftmargin
)
3472 p1
= leftmargin
+ 1;
3473 else /* MULE: it may be a wide-column character */
3475 p1prev
= leftmargin
+ 1;
3476 while (p1prev
< p1
&& *p1prev
& GLYPH_MASK_PADDING
)
3481 if (!WINDOW_RIGHTMOST_P (w
))
3484 if (p1
< leftmargin
) p1
= leftmargin
;
3485 while (p1
< endp
) *p1
++ = SPACEGLYPH
;
3487 /* Don't draw vertical bars if we're using scroll bars. They're
3488 covered up by the scroll bars, and it's distracting to see
3489 them when the scroll bar windows are flickering around to be
3491 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
3494 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
3497 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
3498 *p1
++ = (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
3499 ? DISP_BORDER_GLYPH (dp
)
3502 desired_glyphs
->used
[vpos
] = max (desired_glyphs
->used
[vpos
],
3503 p1
- desired_glyphs
->glyphs
[vpos
]);
3504 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
3506 /* If the start of this line is the overlay arrow-position,
3507 then put the arrow string into the display-line. */
3509 if (MARKERP (Voverlay_arrow_position
)
3510 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
3511 && start
== marker_position (Voverlay_arrow_position
)
3512 && STRINGP (Voverlay_arrow_string
)
3513 && ! overlay_arrow_seen
)
3515 unsigned char *p
= XSTRING (Voverlay_arrow_string
)->data
;
3517 int len
= XSTRING (Voverlay_arrow_string
)->size
;
3523 if (!NULL_INTERVAL_P (XSTRING (Voverlay_arrow_string
)->intervals
))
3525 /* If the arrow string has text props, obey them when displaying. */
3526 for (i
= 0; i
< len
; i
++)
3529 Lisp_Object face
, ilisp
;
3532 XSETFASTINT (ilisp
, i
);
3533 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
3534 newface
= compute_glyph_face_1 (f
, face
, 0);
3535 leftmargin
[i
] = FAST_MAKE_GLYPH (c
, newface
);
3539 #endif /* HAVE_FACES */
3541 for (i
= 0; i
< len
; i
++)
3542 leftmargin
[i
] = p
[i
];
3545 /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */
3546 arrow_end
= (leftmargin
- desired_glyphs
->glyphs
[vpos
]) + len
;
3547 if (desired_glyphs
->used
[vpos
] < arrow_end
)
3548 desired_glyphs
->used
[vpos
] = arrow_end
;
3550 overlay_arrow_seen
= 1;
3554 val
.ovstring_chars_done
= ovstr_done
;
3555 val_display_text_line
= val
;
3556 return &val_display_text_line
;
3559 /* Redisplay the menu bar in the frame for window W. */
3562 display_menu_bar (w
)
3565 Lisp_Object items
, tail
;
3566 register int vpos
= 0;
3567 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
3568 int maxendcol
= FRAME_WIDTH (f
);
3573 if (!NILP (Vwindow_system
))
3577 #ifdef USE_X_TOOLKIT
3580 #endif /* USE_X_TOOLKIT */
3582 get_display_line (f
, vpos
, 0);
3584 items
= FRAME_MENU_BAR_ITEMS (f
);
3585 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
3587 Lisp_Object pos
, string
;
3588 string
= XVECTOR (items
)->contents
[i
+ 1];
3592 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], hpos
);
3594 if (hpos
< maxendcol
)
3595 hpos
= display_string (XWINDOW (FRAME_ROOT_WINDOW (f
)), vpos
,
3596 XSTRING (string
)->data
,
3597 XSTRING (string
)->size
,
3598 hpos
, 0, 0, hpos
, maxendcol
);
3599 /* Put a space between items. */
3600 if (hpos
< maxendcol
)
3602 int hpos1
= hpos
+ 1;
3603 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0,
3604 min (hpos1
, maxendcol
), maxendcol
);
3608 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
3609 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
3611 /* Fill out the line with spaces. */
3612 if (maxendcol
> hpos
)
3613 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0, maxendcol
, maxendcol
);
3615 /* Clear the rest of the lines allocated to the menu bar. */
3617 while (vpos
< FRAME_MENU_BAR_LINES (f
))
3618 get_display_line (f
, vpos
++, 0);
3621 /* Display the mode line for window w */
3624 display_mode_line (w
)
3627 register int vpos
= XFASTINT (w
->height
) + XFASTINT (w
->top
) - 1;
3628 register int left
= WINDOW_LEFT_MARGIN (w
);
3629 register int right
= WINDOW_RIGHT_MARGIN (w
);
3630 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
3632 line_number_displayed
= 0;
3633 w
->column_number_displayed
= Qnil
;
3635 get_display_line (f
, vpos
, left
);
3637 /* Temporarily make frame F's kboard the current kboard
3638 so that kboard-local variables in the mode_line_format
3639 will get the right values. */
3640 push_frame_kboard (f
);
3642 display_mode_element (w
, vpos
, left
, 0, right
, right
,
3643 current_buffer
->mode_line_format
);
3645 pop_frame_kboard ();
3647 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
3649 /* Put the mode line in inverse video.
3650 Use faces if possible, since that lets us handle
3651 partial-width windows and avoid inverting the scroll bar columns. */
3653 if (! FRAME_TERMCAP_P (f
) && mode_line_inverse_video
)
3655 /* For a partial width window, explicitly set face of each glyph. */
3657 unsigned int padding
;
3658 GLYPH
*ptr
= FRAME_DESIRED_GLYPHS (f
)->glyphs
[vpos
];
3659 for (i
= left
; i
< right
; ++i
)
3661 padding
= ptr
[i
] & GLYPH_MASK_PADDING
;
3662 ptr
[i
] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr
[i
]), 1) | padding
;
3668 /* Make the mode line inverse video if the entire line
3669 is made of mode lines.
3670 I.e. if this window is full width,
3671 or if it is the child of a full width window
3672 (which implies that that window is split side-by-side
3673 and the rest of this line is mode lines of the sibling windows). */
3674 if (WINDOW_FULL_WIDTH_P (w
)
3675 || WINDOW_FULL_WIDTH_P (XWINDOW (w
->parent
)))
3676 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
3679 /* Contribute ELT to the mode line for window W.
3680 How it translates into text depends on its data type.
3682 VPOS is the position of the mode line being displayed.
3684 HPOS is the position (absolute on frame) where this element's text
3685 should start. The output is truncated automatically at the right
3688 DEPTH is the depth in recursion. It is used to prevent
3689 infinite recursion here.
3691 MINENDCOL is the hpos before which the element may not end.
3692 The element is padded at the right with spaces if nec
3693 to reach this column.
3695 MAXENDCOL is the hpos past which this element may not extend.
3696 If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority.
3697 (This is necessary to make nested padding and truncation work.)
3699 Returns the hpos of the end of the text generated by ELT.
3700 The next element will receive that value as its HPOS arg,
3701 so as to concatenate the elements. */
3704 display_mode_element (w
, vpos
, hpos
, depth
, minendcol
, maxendcol
, elt
)
3706 register int vpos
, hpos
;
3709 register int maxendcol
;
3710 register Lisp_Object elt
;
3718 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
3722 /* A string: output it and check for %-constructs within it. */
3723 register unsigned char c
;
3724 register unsigned char *this = XSTRING (elt
)->data
;
3726 while (hpos
< maxendcol
&& *this)
3728 unsigned char *last
= this;
3729 while ((c
= *this++) != '\0' && c
!= '%')
3731 if (this - 1 != last
)
3733 register int lim
= --this - last
+ hpos
;
3734 if (frame_title_ptr
)
3735 hpos
= store_frame_title (last
, hpos
, min (lim
, maxendcol
));
3737 hpos
= display_string (w
, vpos
, last
, -1, hpos
, 0, 1,
3738 hpos
, min (lim
, maxendcol
));
3742 register int minendcol
;
3743 register int spec_width
= 0;
3745 /* We can't allow -ve args due to the "%-" construct */
3746 /* Argument specifies minwidth but not maxwidth
3747 (maxwidth can be specified by
3748 (<negative-number> . <stuff>) mode-line elements) */
3750 while ((c
= *this++) >= '0' && c
<= '9')
3752 spec_width
= spec_width
* 10 + (c
- '0');
3755 minendcol
= hpos
+ spec_width
;
3756 if (minendcol
> maxendcol
)
3758 spec_width
= maxendcol
- hpos
;
3759 minendcol
= maxendcol
;
3763 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
3764 spec_width
, maxendcol
,
3765 Vglobal_mode_string
);
3768 char *spec
= decode_mode_spec (w
, c
, spec_width
,
3770 if (frame_title_ptr
)
3771 hpos
= store_frame_title (spec
, minendcol
, maxendcol
);
3773 hpos
= display_string (w
, vpos
, spec
, -1,
3775 minendcol
, maxendcol
);
3783 /* A symbol: process the value of the symbol recursively
3784 as if it appeared here directly. Avoid error if symbol void.
3785 Special case: if value of symbol is a string, output the string
3788 register Lisp_Object tem
;
3789 tem
= Fboundp (elt
);
3792 tem
= Fsymbol_value (elt
);
3793 /* If value is a string, output that string literally:
3794 don't check for % within it. */
3797 if (frame_title_ptr
)
3798 hpos
= store_frame_title (XSTRING (tem
)->data
,
3799 minendcol
, maxendcol
);
3801 hpos
= display_string (w
, vpos
, XSTRING (tem
)->data
,
3802 XSTRING (tem
)->size
,
3803 hpos
, 0, 1, minendcol
, maxendcol
);
3805 /* Give up right away for nil or t. */
3806 else if (!EQ (tem
, elt
))
3807 { elt
= tem
; goto tail_recurse
; }
3814 register Lisp_Object car
, tem
;
3816 /* A cons cell: three distinct cases.
3817 If first element is a string or a cons, process all the elements
3818 and effectively concatenate them.
3819 If first element is a negative number, truncate displaying cdr to
3820 at most that many characters. If positive, pad (with spaces)
3821 to at least that many characters.
3822 If first element is a symbol, process the cadr or caddr recursively
3823 according to whether the symbol's value is non-nil or nil. */
3824 car
= XCONS (elt
)->car
;
3827 tem
= Fboundp (car
);
3828 elt
= XCONS (elt
)->cdr
;
3831 /* elt is now the cdr, and we know it is a cons cell.
3832 Use its car if CAR has a non-nil value. */
3835 tem
= Fsymbol_value (car
);
3837 { elt
= XCONS (elt
)->car
; goto tail_recurse
; }
3839 /* Symbol's value is nil (or symbol is unbound)
3840 Get the cddr of the original list
3841 and if possible find the caddr and use that. */
3842 elt
= XCONS (elt
)->cdr
;
3845 else if (!CONSP (elt
))
3847 elt
= XCONS (elt
)->car
;
3850 else if (INTEGERP (car
))
3852 register int lim
= XINT (car
);
3853 elt
= XCONS (elt
)->cdr
;
3855 /* Negative int means reduce maximum width.
3856 DO NOT change MINENDCOL here!
3857 (20 -10 . foo) should truncate foo to 10 col
3858 and then pad to 20. */
3859 maxendcol
= min (maxendcol
, hpos
- lim
);
3862 /* Padding specified. Don't let it be more than
3865 if (lim
> maxendcol
)
3867 /* If that's more padding than already wanted, queue it.
3868 But don't reduce padding already specified even if
3869 that is beyond the current truncation point. */
3870 if (lim
> minendcol
)
3875 else if (STRINGP (car
) || CONSP (car
))
3877 register int limit
= 50;
3878 /* LIMIT is to protect against circular lists. */
3879 while (CONSP (elt
) && --limit
> 0
3880 && hpos
< maxendcol
)
3882 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
3885 elt
= XCONS (elt
)->cdr
;
3893 if (frame_title_ptr
)
3894 hpos
= store_frame_title ("*invalid*", minendcol
, maxendcol
);
3896 hpos
= display_string (w
, vpos
, "*invalid*", -1, hpos
, 0, 1,
3897 minendcol
, maxendcol
);
3901 if (minendcol
> hpos
)
3902 if (frame_title_ptr
)
3903 hpos
= store_frame_title ("", minendcol
, maxendcol
);
3905 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 1, minendcol
, maxendcol
);
3909 /* Write a null-terminated, right justified decimal representation of
3910 the positive integer D to BUF using a minimal field width WIDTH. */
3913 pint2str (buf
, width
, d
)
3918 register char *p
= buf
;
3925 *p
++ = d
% 10 + '0';
3928 for (width
-= (int) (p
- buf
); width
> 0; --width
) *p
++ = ' ';
3938 /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF.
3939 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
3940 type of CODING_SYSTEM. Return updated pointer into BUF. */
3943 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
3944 Lisp_Object coding_system
;
3948 register Lisp_Object val
= coding_system
;
3950 if (NILP (val
)) /* Not yet decided. */
3953 if (eol_flag
) *buf
++ = eol_mnemonic_undecided
;
3957 while (!NILP (val
) && SYMBOLP (val
))
3958 val
= Fget (val
, Qcoding_system
);
3959 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
3962 val
= Fget (coding_system
, Qeol_type
);
3964 if (NILP (val
)) /* Not yet decided. */
3965 *buf
++ = eol_mnemonic_undecided
;
3966 else if (VECTORP (val
)) /* Not yet decided. */
3967 *buf
++ = eol_mnemonic_undecided
;
3968 else /* INTEGERP (val) -- 1:LF, 2:CRLF, 3:CR */
3969 *buf
++ = (XFASTINT (val
) == 1
3971 : (XFASTINT (val
) == 2
3972 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
3978 /* Return a string for the output of a mode line %-spec for window W,
3979 generated by character C. SPEC_WIDTH is the field width when
3980 padding to the left (%c, %l). The value returned from this
3981 function will later be truncated to width MAXWIDTH. */
3983 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
3986 decode_mode_spec (w
, c
, spec_width
, maxwidth
)
3989 register int spec_width
;
3990 register int maxwidth
;
3993 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
3994 char *decode_mode_spec_buf
= (char *) FRAME_TEMP_GLYPHS (f
)->total_contents
;
3995 struct buffer
*b
= XBUFFER (w
->buffer
);
3998 if (maxwidth
> FRAME_WIDTH (f
))
3999 maxwidth
= FRAME_WIDTH (f
);
4004 if (!NILP (b
->read_only
))
4006 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4011 /* This differs from %* only for a modified read-only buffer. */
4012 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4014 if (!NILP (b
->read_only
))
4019 /* This differs from %* in ignoring read-only-ness. */
4020 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4032 if (command_loop_level
> 5)
4034 p
= decode_mode_spec_buf
;
4035 for (i
= 0; i
< command_loop_level
; i
++)
4038 return decode_mode_spec_buf
;
4046 if (command_loop_level
> 5)
4048 p
= decode_mode_spec_buf
;
4049 for (i
= 0; i
< command_loop_level
; i
++)
4052 return decode_mode_spec_buf
;
4060 if (maxwidth
< sizeof (lots_of_dashes
))
4061 return lots_of_dashes
;
4064 for (p
= decode_mode_spec_buf
, i
= maxwidth
; i
> 0; i
--)
4068 return decode_mode_spec_buf
;
4074 if (maxwidth
>= 3 && XSTRING (obj
)->size
> maxwidth
)
4076 bcopy (XSTRING (obj
)->data
, decode_mode_spec_buf
, maxwidth
- 1);
4077 decode_mode_spec_buf
[maxwidth
- 1] = '\\';
4078 decode_mode_spec_buf
[maxwidth
] = '\0';
4079 return decode_mode_spec_buf
;
4086 int col
= current_column ();
4087 XSETFASTINT (w
->column_number_displayed
, col
);
4088 pint2str (decode_mode_spec_buf
, spec_width
, col
);
4089 return decode_mode_spec_buf
;
4093 /* %F displays the frame name. */
4094 if (!NILP (f
->title
))
4095 return (char *) XSTRING (f
->title
)->data
;
4096 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
4097 return (char *) XSTRING (f
->name
)->data
;
4105 else if (STRINGP (obj
) && XSTRING (obj
)->size
> maxwidth
)
4107 bcopy ("...", decode_mode_spec_buf
, 3);
4108 bcopy (XSTRING (obj
)->data
+ XSTRING (obj
)->size
- maxwidth
+ 3,
4109 decode_mode_spec_buf
+ 3, maxwidth
- 3);
4110 return decode_mode_spec_buf
;
4117 int startpos
= marker_position (w
->start
);
4118 int line
, linepos
, topline
;
4121 int height
= XFASTINT (w
->height
);
4123 /* If we decided that this buffer isn't suitable for line numbers,
4124 don't forget that too fast. */
4125 if (EQ (w
->base_line_pos
, w
->buffer
))
4127 /* But do forget it, if the window shows a different buffer now. */
4128 else if (BUFFERP (w
->base_line_pos
))
4129 w
->base_line_pos
= Qnil
;
4131 /* If the buffer is very big, don't waste time. */
4132 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
4134 w
->base_line_pos
= Qnil
;
4135 w
->base_line_number
= Qnil
;
4139 if (!NILP (w
->base_line_number
)
4140 && !NILP (w
->base_line_pos
)
4141 && XFASTINT (w
->base_line_pos
) <= marker_position (w
->start
))
4143 line
= XFASTINT (w
->base_line_number
);
4144 linepos
= XFASTINT (w
->base_line_pos
);
4149 linepos
= BUF_BEGV (b
);
4152 /* Count lines from base line to window start position. */
4153 nlines
= display_count_lines (linepos
, startpos
, startpos
, &junk
);
4155 topline
= nlines
+ line
;
4157 /* Determine a new base line, if the old one is too close
4158 or too far away, or if we did not have one.
4159 "Too close" means it's plausible a scroll-down would
4161 if (startpos
== BUF_BEGV (b
))
4163 XSETFASTINT (w
->base_line_number
, topline
);
4164 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
4166 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
4167 || linepos
== BUF_BEGV (b
))
4169 int limit
= BUF_BEGV (b
);
4171 int distance
= (height
* 2 + 30) * 200;
4173 if (startpos
- distance
> limit
)
4174 limit
= startpos
- distance
;
4176 nlines
= display_count_lines (startpos
, limit
,
4179 /* If we couldn't find the lines we wanted within
4181 give up on line numbers for this window. */
4182 if (position
== startpos
- distance
)
4184 w
->base_line_pos
= w
->buffer
;
4185 w
->base_line_number
= Qnil
;
4189 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
4190 XSETFASTINT (w
->base_line_pos
, position
);
4193 /* Now count lines from the start pos to point. */
4194 nlines
= display_count_lines (startpos
, PT
, PT
, &junk
);
4196 /* Record that we did display the line number. */
4197 line_number_displayed
= 1;
4199 /* Make the string to show. */
4200 pint2str (decode_mode_spec_buf
, spec_width
, topline
+ nlines
);
4201 return decode_mode_spec_buf
;
4204 char* p
= decode_mode_spec_buf
;
4205 for (spec_width
-= 2; spec_width
> 0; --spec_width
) *p
++ = ' ';
4207 return decode_mode_spec_buf
;
4217 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
4223 int pos
= marker_position (w
->start
);
4224 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4226 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
4228 if (pos
<= BUF_BEGV (b
))
4233 else if (pos
<= BUF_BEGV (b
))
4237 if (total
> 1000000)
4238 /* Do it differently for a large value, to avoid overflow. */
4239 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4241 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4242 /* We can't normally display a 3-digit number,
4243 so get us a 2-digit number that is close. */
4246 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4247 return decode_mode_spec_buf
;
4251 /* Display percentage of size above the bottom of the screen. */
4254 int toppos
= marker_position (w
->start
);
4255 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
4256 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4258 if (botpos
>= BUF_ZV (b
))
4260 if (toppos
<= BUF_BEGV (b
))
4267 if (total
> 1000000)
4268 /* Do it differently for a large value, to avoid overflow. */
4269 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4271 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4272 /* We can't normally display a 3-digit number,
4273 so get us a 2-digit number that is close. */
4276 if (toppos
<= BUF_BEGV (b
))
4277 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
4279 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4280 return decode_mode_spec_buf
;
4285 /* status of process */
4286 obj
= Fget_buffer_process (w
->buffer
);
4288 return "no process";
4290 obj
= Fsymbol_name (Fprocess_status (obj
));
4294 case 't': /* indicate TEXT or BINARY */
4295 #ifdef MODE_LINE_BINARY_TEXT
4296 return MODE_LINE_BINARY_TEXT (b
);
4302 /* coding-system (not including end-of-line format) */
4304 /* coding-system (including end-of-line type) */
4306 int eol_flag
= (c
== 'Z');
4309 p
= decode_mode_spec_coding
4310 (find_symbol_value (Qbuffer_file_coding_system
),
4311 decode_mode_spec_buf
, eol_flag
);
4312 if (FRAME_TERMCAP_P (f
))
4314 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, eol_flag
);
4315 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, eol_flag
);
4318 obj
= Fget_buffer_process (Fcurrent_buffer ());
4321 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
4323 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
4326 #endif /* subprocesses */
4328 return decode_mode_spec_buf
;
4333 return (char *) XSTRING (obj
)->data
;
4338 /* Search for COUNT instances of a line boundary, which means either a
4339 newline or (if selective display enabled) a carriage return.
4340 Start at START. If COUNT is negative, search backwards.
4342 If we find COUNT instances, set *SHORTAGE to zero, and return the
4343 position after the COUNTth match. Note that for reverse motion
4344 this is not the same as the usual convention for Emacs motion commands.
4346 If we don't find COUNT instances before reaching the end of the
4347 buffer (or the beginning, if scanning backwards), set *SHORTAGE to
4348 the number of line boundaries left unfound, and return the end of the
4349 buffer we bumped up against. */
4352 display_scan_buffer (start
, count
, shortage
)
4353 int *shortage
, start
;
4356 int limit
= ((count
> 0) ? ZV
- 1 : BEGV
);
4357 int direction
= ((count
> 0) ? 1 : -1);
4359 register unsigned char *cursor
;
4360 unsigned char *base
;
4362 register int ceiling
;
4363 register unsigned char *ceiling_addr
;
4365 /* If we are not in selective display mode,
4366 check only for newlines. */
4367 if (! (!NILP (current_buffer
->selective_display
)
4368 && !INTEGERP (current_buffer
->selective_display
)))
4369 return scan_buffer ('\n', start
, 0, count
, shortage
, 0);
4371 /* The code that follows is like scan_buffer
4372 but checks for either newline or carriage return. */
4378 while (start
!= limit
+ 1)
4380 ceiling
= BUFFER_CEILING_OF (start
);
4381 ceiling
= min (limit
, ceiling
);
4382 ceiling_addr
= POS_ADDR (ceiling
) + 1;
4383 base
= (cursor
= POS_ADDR (start
));
4386 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
4388 if (cursor
!= ceiling_addr
)
4393 return (start
+ cursor
- base
+ 1);
4396 if (++cursor
== ceiling_addr
)
4402 start
+= cursor
- base
;
4406 start
--; /* first character we scan */
4407 while (start
> limit
- 1)
4408 { /* we WILL scan under start */
4409 ceiling
= BUFFER_FLOOR_OF (start
);
4410 ceiling
= max (limit
, ceiling
);
4411 ceiling_addr
= POS_ADDR (ceiling
) - 1;
4412 base
= (cursor
= POS_ADDR (start
));
4416 while (--cursor
!= ceiling_addr
4417 && *cursor
!= '\n' && *cursor
!= 015)
4419 if (cursor
!= ceiling_addr
)
4424 return (start
+ cursor
- base
+ 1);
4430 start
+= cursor
- base
;
4435 *shortage
= count
* direction
;
4436 return (start
+ ((direction
== 1 ? 0 : 1)));
4439 /* Count up to N lines starting from FROM.
4440 But don't go beyond LIMIT.
4441 Return the number of lines thus found (always positive).
4442 Store the position after what was found into *POS_PTR. */
4445 display_count_lines (from
, limit
, n
, pos_ptr
)
4458 *pos_ptr
= display_scan_buffer (from
, n
, &shortage
);
4464 /* When scanning backwards, scan_buffer stops *after* the last newline
4465 it finds, but does count it. Compensate for that. */
4466 return - n
- shortage
- (*pos_ptr
!= limit
);
4467 return n
- shortage
;
4470 /* Display STRING on one line of window W, starting at HPOS.
4471 Display at position VPOS. Caller should have done get_display_line.
4472 If VPOS == -1, display it as the current frame's title.
4473 LENGTH is the length of STRING, or -1 meaning STRING is null-terminated.
4475 TRUNCATE is GLYPH to display at end if truncated. Zero for none.
4477 MINCOL is the first column ok to end at. (Pad with spaces to this col.)
4478 MAXCOL is the last column ok to end at. Truncate here.
4479 -1 for MINCOL or MAXCOL means no explicit minimum or maximum.
4480 Both count from the left edge of the frame, as does HPOS.
4481 The right edge of W is an implicit maximum.
4482 If TRUNCATE is nonzero, the implicit maximum is one column before the edge.
4484 OBEY_WINDOW_WIDTH says to put spaces or vertical bars
4485 at the place where the current window ends in this line
4486 and not display anything beyond there. Otherwise, only MAXCOL
4487 controls where to stop output.
4489 Returns ending hpos. */
4492 display_string (w
, vpos
, string
, length
, hpos
, truncate
,
4493 obey_window_width
, mincol
, maxcol
)
4495 unsigned char *string
;
4499 int obey_window_width
;
4505 int hscroll
= XINT (w
->hscroll
);
4506 int tab_width
= XINT (XBUFFER (w
->buffer
)->tab_width
);
4507 register GLYPH
*start
;
4508 register GLYPH
*end
;
4509 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4510 struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
4511 GLYPH
*p1start
= desired_glyphs
->glyphs
[vpos
] + hpos
;
4512 int window_width
= XFASTINT (w
->width
);
4513 /* If 1, we must display multibyte characters. */
4514 int multibyte
= !NILP (XBUFFER (w
->buffer
)->enable_multibyte_characters
);
4516 /* Use the standard display table, not the window's display table.
4517 We don't want the mode line in rot13. */
4518 register struct Lisp_Char_Table
*dp
= 0;
4521 if (DISP_TABLE_P (Vstandard_display_table
))
4522 dp
= XCHAR_TABLE (Vstandard_display_table
);
4524 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
4527 start
= desired_glyphs
->glyphs
[vpos
] + XFASTINT (w
->left
);
4529 if (obey_window_width
)
4531 end
= start
+ window_width
- (truncate
!= 0);
4533 if (!WINDOW_RIGHTMOST_P (w
))
4535 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
4539 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
4542 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
4547 if (! obey_window_width
4548 || (maxcol
>= 0 && end
- desired_glyphs
->glyphs
[vpos
] > maxcol
))
4549 end
= desired_glyphs
->glyphs
[vpos
] + maxcol
;
4551 /* Store 0 in charstart for these columns. */
4552 for (i
= (hpos
>= 0 ? hpos
: 0); i
< end
- p1start
+ hpos
; i
++)
4553 desired_glyphs
->charstarts
[vpos
][i
] = 0;
4555 if (maxcol
>= 0 && mincol
> maxcol
)
4559 /* We need this value for multibyte characters. */
4560 length
= strlen (string
);
4562 /* We set truncated to 1 if we get stopped by trying to pass END
4563 (that is, trying to pass MAXCOL.) */
4572 c
= STRING_CHAR_AND_LENGTH (string
, length
, len
);
4574 c
= *string
, len
= 1;
4576 string
+= len
, length
-= len
;
4584 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
4586 p1
= copy_part_of_rope (f
, p1
, start
,
4587 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
4588 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
4591 else if (c
>= 040 && c
< 0177)
4601 if (p1
>= start
&& p1
< end
)
4605 while ((p1
- start
+ hscroll
- (hscroll
> 0)) % tab_width
);
4607 else if (c
< 0200 && ! NILP (buffer_defaults
.ctl_arrow
))
4611 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
4612 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
4613 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
4616 if (p1
>= start
&& p1
< end
)
4622 /* C is a control character or a binary byte data. */
4625 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
4626 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
4627 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
4630 if (p1
>= start
&& p1
< end
)
4631 *p1
= (c
>> 6) + '0';
4633 if (p1
>= start
&& p1
< end
)
4634 *p1
= (7 & (c
>> 3)) + '0';
4636 if (p1
>= start
&& p1
< end
)
4637 *p1
= (7 & c
) + '0';
4642 /* C is a multibyte character. */
4643 int charset
= CHAR_CHARSET (c
);
4644 int columns
= (charset
== CHARSET_COMPOSITION
4645 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
4646 : CHARSET_WIDTH (charset
));
4650 /* Since we can't show the left part of C, fill all
4651 columns with spaces. */
4652 columns
-= start
- p1
;
4661 else if (p1
+ columns
> end
)
4663 /* Since we can't show the right part of C, fill all
4664 columns with TRUNCATE if TRUNCATE is specified. */
4668 *p1
++ = fix_glyph (f
, truncate
, 0);
4669 /* And tell the line is truncated. */
4676 /* We can show the whole glyph of C. */
4679 *p1
++ = c
| GLYPH_MASK_PADDING
;
4687 if (truncate
) *p1
++ = fix_glyph (f
, truncate
, 0);
4689 else if (mincol
>= 0)
4691 end
= desired_glyphs
->glyphs
[vpos
] + mincol
;
4697 register int len
= p1
- desired_glyphs
->glyphs
[vpos
];
4699 if (len
> desired_glyphs
->used
[vpos
])
4700 desired_glyphs
->used
[vpos
] = len
;
4701 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
4707 /* This is like a combination of memq and assq.
4708 Return 1 if PROPVAL appears as an element of LIST
4709 or as the car of an element of LIST.
4710 If PROPVAL is a list, compare each element against LIST
4711 in that way, and return 1 if any element of PROPVAL is found in LIST.
4713 This function cannot quit. */
4716 invisible_p (propval
, list
)
4717 register Lisp_Object propval
;
4720 register Lisp_Object tail
, proptail
;
4721 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4723 register Lisp_Object tem
;
4724 tem
= XCONS (tail
)->car
;
4725 if (EQ (propval
, tem
))
4727 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
4730 if (CONSP (propval
))
4731 for (proptail
= propval
; CONSP (proptail
);
4732 proptail
= XCONS (proptail
)->cdr
)
4734 Lisp_Object propelt
;
4735 propelt
= XCONS (proptail
)->car
;
4736 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4738 register Lisp_Object tem
;
4739 tem
= XCONS (tail
)->car
;
4740 if (EQ (propelt
, tem
))
4742 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
4749 /* Return 1 if PROPVAL appears as the car of an element of LIST
4750 and the cdr of that element is non-nil.
4751 If PROPVAL is a list, check each element of PROPVAL in that way,
4752 and the first time some element is found,
4753 return 1 if the cdr of that element is non-nil.
4755 This function cannot quit. */
4758 invisible_ellipsis_p (propval
, list
)
4759 register Lisp_Object propval
;
4762 register Lisp_Object tail
, proptail
;
4763 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4765 register Lisp_Object tem
;
4766 tem
= XCONS (tail
)->car
;
4767 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
4768 return ! NILP (XCONS (tem
)->cdr
);
4770 if (CONSP (propval
))
4771 for (proptail
= propval
; CONSP (proptail
);
4772 proptail
= XCONS (proptail
)->cdr
)
4774 Lisp_Object propelt
;
4775 propelt
= XCONS (proptail
)->car
;
4776 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4778 register Lisp_Object tem
;
4779 tem
= XCONS (tail
)->car
;
4780 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
4781 return ! NILP (XCONS (tem
)->cdr
);
4790 staticpro (&Qmenu_bar_update_hook
);
4791 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
4793 staticpro (&Qoverriding_terminal_local_map
);
4794 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
4796 staticpro (&Qoverriding_local_map
);
4797 Qoverriding_local_map
= intern ("overriding-local-map");
4799 staticpro (&Qwindow_scroll_functions
);
4800 Qwindow_scroll_functions
= intern ("window-scroll-functions");
4802 staticpro (&Qredisplay_end_trigger_functions
);
4803 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
4805 staticpro (&last_arrow_position
);
4806 staticpro (&last_arrow_string
);
4807 last_arrow_position
= Qnil
;
4808 last_arrow_string
= Qnil
;
4810 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
4811 "String (or mode line construct) included (normally) in `mode-line-format'.");
4812 Vglobal_mode_string
= Qnil
;
4814 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
4815 "Marker for where to display an arrow on top of the buffer text.\n\
4816 This must be the beginning of a line in order to work.\n\
4817 See also `overlay-arrow-string'.");
4818 Voverlay_arrow_position
= Qnil
;
4820 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
4821 "String to display as an arrow. See also `overlay-arrow-position'.");
4822 Voverlay_arrow_string
= Qnil
;
4824 DEFVAR_INT ("scroll-step", &scroll_step
,
4825 "*The number of lines to try scrolling a window by when point moves out.\n\
4826 If that fails to bring point back on frame, point is centered instead.\n\
4827 If this is zero, point is always centered after it moves off frame.");
4829 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
4830 "*Scroll up to this many lines, to bring point back on screen.");
4831 scroll_conservatively
= 0;
4833 DEFVAR_INT ("scroll-margin", &scroll_margin
,
4834 "*Number of lines of margin at the top and bottom of a window.\n\
4835 Recenter the window whenever point gets within this many lines\n\
4836 of the top or bottom of the window.");
4839 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
4841 DEFVAR_BOOL ("truncate-partial-width-windows",
4842 &truncate_partial_width_windows
,
4843 "*Non-nil means truncate lines in all windows less than full frame wide.");
4844 truncate_partial_width_windows
= 1;
4846 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
4847 "*Non-nil means use inverse video for the mode line.");
4848 mode_line_inverse_video
= 1;
4850 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
4851 "*Maximum buffer size for which line number should be displayed.");
4852 line_number_display_limit
= 1000000;
4854 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
4855 "*Non-nil means highlight region even in nonselected windows.");
4856 highlight_nonselected_windows
= 1;
4858 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
4859 "Non-nil if more than one frame is visible on this display.\n\
4860 Minibuffer-only frames don't count, but iconified frames do.\n\
4861 This variable is not guaranteed to be accurate except while processing\n\
4862 `frame-title-format' and `icon-title-format'.");
4864 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
4865 "Template for displaying the titlebar of visible frames.\n\
4866 \(Assuming the window manager supports this feature.)\n\
4867 This variable has the same structure as `mode-line-format' (which see),\n\
4868 and is used only on frames for which no explicit name has been set\n\
4869 \(see `modify-frame-parameters').");
4870 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
4871 "Template for displaying the titlebar of an iconified frame.\n\
4872 \(Assuming the window manager supports this feature.)\n\
4873 This variable has the same structure as `mode-line-format' (which see),\n\
4874 and is used only on frames for which no explicit name has been set\n\
4875 \(see `modify-frame-parameters').");
4877 = Vframe_title_format
4878 = Fcons (intern ("multiple-frames"),
4879 Fcons (build_string ("%b"),
4880 Fcons (Fcons (build_string (""),
4881 Fcons (intern ("invocation-name"),
4882 Fcons (build_string ("@"),
4883 Fcons (intern ("system-name"),
4887 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
4888 "Maximum number of lines to keep in the message log buffer.\n\
4889 If nil, disable message logging. If t, log messages but don't truncate\n\
4890 the buffer when it becomes large.");
4891 XSETFASTINT (Vmessage_log_max
, 50);
4893 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
4894 "Functions called before redisplay, if window sizes have changed.\n\
4895 The value should be a list of functions that take one argument.\n\
4896 Just before redisplay, for each frame, if any of its windows have changed\n\
4897 size since the last redisplay, or have been split or deleted,\n\
4898 all the functions in the list are called, with the frame as argument.");
4899 Vwindow_size_change_functions
= Qnil
;
4901 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
4902 "List of Functions to call before redisplaying a window with scrolling.\n\
4903 Each function is called with two arguments, the window\n\
4904 and its new display-start position. Note that the value of `window-end'\n\
4905 is not valid when these functions are called.");
4906 Vwindow_scroll_functions
= Qnil
;
4909 /* initialize the window system */
4912 Lisp_Object root_window
;
4913 #ifndef COMPILER_REGISTER_BUG
4915 #endif /* COMPILER_REGISTER_BUG */
4916 struct window
*mini_w
;
4918 this_line_bufpos
= 0;
4920 mini_w
= XWINDOW (minibuf_window
);
4921 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
4923 echo_area_glyphs
= 0;
4924 previous_echo_glyphs
= 0;
4926 if (!noninteractive
)
4928 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
4929 XSETFASTINT (XWINDOW (root_window
)->top
, 0);
4930 set_window_height (root_window
, FRAME_HEIGHT (f
) - 1, 0);
4931 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
4932 set_window_height (minibuf_window
, 1, 0);
4934 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
4935 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));