1 /* Display generation from window structure and buffer text.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 1998
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 /*#include <ctype.h>*/
31 #include "dispextern.h"
38 #include "termhooks.h"
39 #include "intervals.h"
43 #include "region-cache.h"
49 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
50 extern void set_frame_menubar ();
51 extern int pending_menu_activation
;
54 extern int interrupt_input
;
55 extern int command_loop_level
;
57 extern int minibuffer_auto_raise
;
59 extern Lisp_Object Qface
;
61 extern Lisp_Object Voverriding_local_map
;
62 extern Lisp_Object Voverriding_local_map_menu_flag
;
64 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
65 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
66 Lisp_Object Qredisplay_end_trigger_functions
;
67 Lisp_Object Qinhibit_point_motion_hooks
;
69 /* Nonzero means print newline to stdout before next minibuffer message. */
71 int noninteractive_need_newline
;
73 /* Nonzero means print newline to message log before next message. */
75 static int message_log_need_newline
;
77 #define min(a, b) ((a) < (b) ? (a) : (b))
78 #define max(a, b) ((a) > (b) ? (a) : (b))
79 #define minmax(floor, val, ceil) \
80 ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val))
82 /* The buffer position of the first character appearing
83 entirely or partially on the current frame line.
84 Or zero, which disables the optimization for the current frame line. */
85 static int this_line_bufpos
;
87 /* Number of characters past the end of this line,
88 including the terminating newline */
89 static int this_line_endpos
;
91 /* The vertical position of this frame line. */
92 static int this_line_vpos
;
94 /* Hpos value for start of display on this frame line.
95 Usually zero, but negative if first character really began
97 static int this_line_start_hpos
;
99 /* Buffer that this_line variables are describing. */
100 static struct buffer
*this_line_buffer
;
102 /* Value of echo_area_glyphs when it was last acted on.
103 If this is nonzero, there is a message on the frame
104 in the minibuffer and it should be erased as soon
105 as it is no longer requested to appear. */
106 char *previous_echo_glyphs
;
108 /* Nonzero means truncate lines in all windows less wide than the frame */
109 int truncate_partial_width_windows
;
111 /* Nonzero means we have more than one non-minibuffer-only frame.
112 Not guaranteed to be accurate except while parsing frame-title-format. */
115 Lisp_Object Vglobal_mode_string
;
117 /* Marker for where to display an arrow on top of the buffer text. */
118 Lisp_Object Voverlay_arrow_position
;
120 /* String to display for the arrow. */
121 Lisp_Object Voverlay_arrow_string
;
123 /* Values of those variables at last redisplay.
124 However, if Voverlay_arrow_position is a marker,
125 last_arrow_position is its numerical position. */
126 static Lisp_Object last_arrow_position
, last_arrow_string
;
128 /* Like mode-line-format, but for the titlebar on a visible frame. */
129 Lisp_Object Vframe_title_format
;
131 /* Like mode-line-format, but for the titlebar on an iconified frame. */
132 Lisp_Object Vicon_title_format
;
134 /* List of functions to call when a window's size changes. These
135 functions get one arg, a frame on which one or more windows' sizes
137 static Lisp_Object Vwindow_size_change_functions
;
139 Lisp_Object Qmenu_bar_update_hook
;
141 /* Nonzero if overlay arrow has been displayed once in this window. */
142 static int overlay_arrow_seen
;
144 /* Nonzero if visible end of buffer has already been displayed once
145 in this window. (We need this variable in case there are overlay
146 strings that get displayed there.) */
147 static int zv_strings_seen
;
149 /* Nonzero means highlight the region even in nonselected windows. */
150 static int highlight_nonselected_windows
;
152 /* If cursor motion alone moves point off frame,
153 Try scrolling this many lines up or down if that will bring it back. */
154 static int scroll_step
;
156 /* Non-0 means scroll just far enough to bring point back on the screen,
158 static int scroll_conservatively
;
160 /* Recenter the window whenever point gets within this many lines
161 of the top or bottom of the window. */
164 /* Number of characters of overlap to show,
165 when scrolling a one-line window such as a minibuffer. */
166 static int minibuffer_scroll_overlap
;
168 /* Nonzero if try_window_id has made blank lines at window bottom
169 since the last redisplay that paused */
170 static int blank_end_of_window
;
172 /* Number of windows showing the buffer of the selected window
173 (or another buffer with the same base buffer).
174 keyboard.c refers to this. */
177 /* display_text_line sets these to the frame position (origin 0) of point,
178 whether the window is selected or not.
179 Set one to -1 first to determine whether point was found afterwards. */
181 static int cursor_vpos
;
182 static int cursor_hpos
;
184 static int debug_end_pos
;
186 /* Nonzero means display mode line highlighted */
187 int mode_line_inverse_video
;
189 static void redisplay_internal ();
190 static int message_log_check_duplicate ();
191 static void echo_area_display ();
192 void mark_window_display_accurate ();
193 static void redisplay_windows ();
194 static void redisplay_window ();
195 static void update_menu_bar ();
196 static void try_window ();
197 static int try_window_id ();
198 static struct position
*display_text_line ();
199 static void display_mode_line ();
200 static int display_mode_element ();
201 static char *decode_mode_spec ();
202 static int display_string ();
203 static void display_menu_bar ();
204 static int display_count_lines ();
206 /* Prompt to display in front of the minibuffer contents */
207 Lisp_Object minibuf_prompt
;
209 /* Width in columns of current minibuffer prompt. */
210 int minibuf_prompt_width
;
212 /* Message to display instead of minibuffer contents
213 This is what the functions error and message make,
214 and command echoing uses it as well.
215 It overrides the minibuf_prompt as well as the buffer. */
216 char *echo_area_glyphs
;
218 /* This is the length of the message in echo_area_glyphs. */
219 int echo_area_glyphs_length
;
221 /* This is the window where the echo area message was displayed.
222 It is always a minibuffer window, but it may not be the
223 same window currently active as a minibuffer. */
224 Lisp_Object echo_area_window
;
226 /* Nonzero means multibyte characters were enabled when the echo area
227 message was specified. */
228 int message_enable_multibyte
;
230 /* true iff we should redraw the mode lines on the next redisplay */
231 int update_mode_lines
;
233 /* Smallest number of characters before the gap
234 at any time since last redisplay that finished.
235 Valid for current buffer when try_window_id can be called. */
238 /* Smallest number of characters after the gap
239 at any time since last redisplay that finished.
240 Valid for current buffer when try_window_id can be called. */
243 /* MODIFF as of last redisplay that finished;
244 if it matches MODIFF, and overlay_unchanged_modified
245 matches OVERLAY_MODIFF, that means beg_unchanged and end_unchanged
246 contain no useful information */
247 int unchanged_modified
;
249 /* OVERLAY_MODIFF as of last redisplay that finished. */
250 int overlay_unchanged_modified
;
252 /* Nonzero if window sizes or contents have changed
253 since last redisplay that finished */
254 int windows_or_buffers_changed
;
256 /* Nonzero after display_mode_line if %l was used
257 and it displayed a line number. */
258 int line_number_displayed
;
260 /* Maximum buffer size for which to display line numbers. */
261 static int line_number_display_limit
;
263 /* Number of lines to keep in the message log buffer.
264 t means infinite. nil means don't log at all. */
265 Lisp_Object Vmessage_log_max
;
267 #define COERCE_MARKER(X) \
268 (MARKERP ((X)) ? Fmarker_position (X) : (X))
270 static int pos_tab_offset
P_ ((struct window
*, int, int));
272 /* Output a newline in the *Messages* buffer if "needs" one. */
275 message_log_maybe_newline ()
277 if (message_log_need_newline
)
278 message_dolog ("", 0, 1, 0);
282 /* Add a string to the message log, optionally terminated with a newline.
283 This function calls low-level routines in order to bypass text property
284 hooks, etc. which might not be safe to run.
285 MULTIBYTE, if nonzero, means interpret the contents of M as multibyte. */
288 message_dolog (m
, len
, nlflag
, multibyte
)
290 int len
, nlflag
, multibyte
;
292 if (!NILP (Vmessage_log_max
))
294 struct buffer
*oldbuf
;
295 Lisp_Object oldpoint
, oldbegv
, oldzv
;
296 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
297 int point_at_end
= 0;
299 Lisp_Object old_deactivate_mark
;
301 old_deactivate_mark
= Vdeactivate_mark
;
302 oldbuf
= current_buffer
;
303 Fset_buffer (Fget_buffer_create (build_string ("*Messages*")));
304 current_buffer
->undo_list
= Qt
;
306 oldpoint
= Fpoint_marker ();
307 oldbegv
= Fpoint_min_marker ();
308 oldzv
= Fpoint_max_marker ();
316 BEGV_BYTE
= BEG_BYTE
;
319 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
321 /* Insert the string--maybe converting multibyte to single byte
322 or vice versa, so that all the text fits the buffer. */
324 && NILP (current_buffer
->enable_multibyte_characters
))
326 int c
, i
= 0, nbytes
;
327 /* Convert a multibyte string to single-byte
328 for the *Message* buffer. */
331 c
= STRING_CHAR (m
+ i
, len
- i
);
332 i
+= XFASTINT (Fchar_bytes (make_number (c
)));
333 /* Truncate the character to its last byte--we can only hope
334 the user is happy with the character he gets,
335 since if it isn't right, there is no way to do it right. */
341 && ! NILP (current_buffer
->enable_multibyte_characters
))
344 unsigned char *msg
= (unsigned char *) m
;
345 /* Convert a single-byte string to multibyte
346 for the *Message* buffer. */
349 int c
= unibyte_char_to_multibyte (msg
[i
++]);
354 insert_1 (m
, len
, 1, 0, 0);
358 int this_bol
, this_bol_byte
, prev_bol
, prev_bol_byte
, dup
;
359 insert_1 ("\n", 1, 1, 0, 0);
361 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
, -2, 0);
363 this_bol_byte
= PT_BYTE
;
367 scan_newline (PT
, PT_BYTE
, BEG
, BEG_BYTE
, -2, 0);
369 prev_bol_byte
= PT_BYTE
;
371 dup
= message_log_check_duplicate (prev_bol
, prev_bol_byte
,
372 this_bol
, this_bol_byte
);
375 del_range_both (prev_bol
, prev_bol_byte
,
376 this_bol
, this_bol_byte
, 0);
382 /* If you change this format, don't forget to also
383 change message_log_check_duplicate. */
384 sprintf (dupstr
, " [%d times]", dup
);
385 duplen
= strlen (dupstr
);
386 TEMP_SET_PT_BOTH (Z
- 1, Z_BYTE
- 1);
387 insert_1 (dupstr
, duplen
, 1, 0, 1);
392 if (NATNUMP (Vmessage_log_max
))
394 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
,
395 -XFASTINT (Vmessage_log_max
) - 1, 0);
396 del_range_both (BEG
, BEG_BYTE
, PT
, PT_BYTE
, 0);
399 BEGV
= XMARKER (oldbegv
)->charpos
;
400 BEGV_BYTE
= marker_byte_position (oldbegv
);
409 ZV
= XMARKER (oldzv
)->charpos
;
410 ZV_BYTE
= marker_byte_position (oldzv
);
414 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
416 Fgoto_char (oldpoint
);
418 free_marker (oldpoint
);
419 free_marker (oldbegv
);
422 set_buffer_internal (oldbuf
);
423 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
424 message_log_need_newline
= !nlflag
;
425 Vdeactivate_mark
= old_deactivate_mark
;
429 /* We are at the end of the buffer after just having inserted a newline.
430 (Note: We depend on the fact we won't be crossing the gap.)
431 Check to see if the most recent message looks a lot like the previous one.
432 Return 0 if different, 1 if the new one should just replace it, or a
433 value N > 1 if we should also append " [N times]". */
436 message_log_check_duplicate (prev_bol
, prev_bol_byte
, this_bol
, this_bol_byte
)
437 int prev_bol
, this_bol
;
438 int prev_bol_byte
, this_bol_byte
;
441 int len
= Z
- 1 - this_bol
;
443 unsigned char *p1
= BUF_BYTE_ADDRESS (current_buffer
, prev_bol_byte
);
444 unsigned char *p2
= BUF_BYTE_ADDRESS (current_buffer
, this_bol_byte
);
446 for (i
= 0; i
< len
; i
++)
448 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.'
457 if (*p1
++ == ' ' && *p1
++ == '[')
460 while (*p1
>= '0' && *p1
<= '9')
461 n
= n
* 10 + *p1
++ - '0';
462 if (strncmp (p1
, " times]\n", 8) == 0)
468 /* Display an echo area message M with a specified length of LEN chars.
469 The string may include null characters. If M is 0, clear out any
470 existing message, and let the minibuffer text show through.
472 The buffer M must continue to exist until after the echo area
473 gets cleared or some other message gets displayed there.
475 Do not pass text that is stored in a Lisp string.
476 Do not pass text in a buffer that was alloca'd. */
479 message2 (m
, len
, multibyte
)
484 /* First flush out any partial line written with print. */
485 message_log_maybe_newline ();
487 message_dolog (m
, len
, 1, multibyte
);
488 message2_nolog (m
, len
, multibyte
);
492 /* The non-logging counterpart of message2. */
495 message2_nolog (m
, len
, multibyte
)
499 message_enable_multibyte
= multibyte
;
503 if (noninteractive_need_newline
)
505 noninteractive_need_newline
= 0;
507 fwrite (m
, len
, 1, stderr
);
508 if (cursor_in_echo_area
== 0)
509 fprintf (stderr
, "\n");
512 /* A null message buffer means that the frame hasn't really been
513 initialized yet. Error messages get reported properly by
514 cmd_error, so this must be just an informative message; toss it. */
515 else if (INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
517 Lisp_Object mini_window
;
520 /* Get the frame containing the minibuffer
521 that the selected frame is using. */
522 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
523 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
525 FRAME_SAMPLE_VISIBILITY (f
);
526 if (FRAME_VISIBLE_P (selected_frame
)
527 && ! FRAME_VISIBLE_P (f
))
528 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
532 echo_area_glyphs
= m
;
533 echo_area_glyphs_length
= len
;
535 if (minibuffer_auto_raise
)
536 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
539 echo_area_glyphs
= previous_echo_glyphs
= 0;
541 do_pending_window_change ();
542 echo_area_display ();
543 update_frame (f
, 1, 1);
544 do_pending_window_change ();
545 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
546 (*frame_up_to_date_hook
) (f
);
550 /* Display in echo area the null-terminated ASCII-only string M.
551 If M is 0, clear out any existing message,
552 and let the minibuffer text show through.
554 The string M must continue to exist until after the echo area
555 gets cleared or some other message gets displayed there.
557 Do not pass text that is stored in a Lisp string.
558 Do not pass text in a buffer that was alloca'd. */
564 message2 (m
, (m
? strlen (m
) : 0), 0);
571 message2_nolog (m
, (m
? strlen (m
) : 0), 0);
574 /* Display a message M which contains a single %s
575 which gets replaced with STRING. */
578 message_with_string (m
, string
, log
)
587 if (noninteractive_need_newline
)
589 noninteractive_need_newline
= 0;
590 fprintf (stderr
, m
, XSTRING (string
)->data
);
591 if (cursor_in_echo_area
== 0)
592 fprintf (stderr
, "\n");
596 else if (INTERACTIVE
)
598 /* The frame whose minibuffer we're going to display the message on.
599 It may be larger than the selected frame, so we need
600 to use its buffer, not the selected frame's buffer. */
601 Lisp_Object mini_window
;
604 /* Get the frame containing the minibuffer
605 that the selected frame is using. */
606 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
607 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
609 /* A null message buffer means that the frame hasn't really been
610 initialized yet. Error messages get reported properly by
611 cmd_error, so this must be just an informative message; toss it. */
612 if (FRAME_MESSAGE_BUF (f
))
616 a
[0] = (char *) XSTRING (string
)->data
;
618 len
= doprnt (FRAME_MESSAGE_BUF (f
),
619 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
622 message2 (FRAME_MESSAGE_BUF (f
), len
,
623 STRING_MULTIBYTE (string
));
625 message2_nolog (FRAME_MESSAGE_BUF (f
), len
,
626 STRING_MULTIBYTE (string
));
628 /* Print should start at the beginning of the message
630 message_buf_print
= 0;
635 /* Truncate what will be displayed in the echo area
636 the next time we display it--but don't redisplay it now. */
639 truncate_echo_area (len
)
642 /* A null message buffer means that the frame hasn't really been
643 initialized yet. Error messages get reported properly by
644 cmd_error, so this must be just an informative message; toss it. */
645 if (!noninteractive
&& INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
646 echo_area_glyphs_length
= len
;
649 /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print;
650 zero if being used by message. */
651 int message_buf_print
;
653 /* Dump an informative message to the minibuf. If M is 0, clear out
654 any existing message, and let the minibuffer text show through. */
658 message (m
, a1
, a2
, a3
)
660 EMACS_INT a1
, a2
, a3
;
666 if (noninteractive_need_newline
)
668 noninteractive_need_newline
= 0;
669 fprintf (stderr
, m
, a1
, a2
, a3
);
670 if (cursor_in_echo_area
== 0)
671 fprintf (stderr
, "\n");
675 else if (INTERACTIVE
)
677 /* The frame whose minibuffer we're going to display the message on.
678 It may be larger than the selected frame, so we need
679 to use its buffer, not the selected frame's buffer. */
680 Lisp_Object mini_window
;
683 /* Get the frame containing the minibuffer
684 that the selected frame is using. */
685 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
686 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
688 /* A null message buffer means that the frame hasn't really been
689 initialized yet. Error messages get reported properly by
690 cmd_error, so this must be just an informative message; toss it. */
691 if (FRAME_MESSAGE_BUF (f
))
702 len
= doprnt (FRAME_MESSAGE_BUF (f
),
703 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
705 len
= doprnt (FRAME_MESSAGE_BUF (f
),
706 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3,
708 #endif /* NO_ARG_ARRAY */
710 message2 (FRAME_MESSAGE_BUF (f
), len
, 0);
715 /* Print should start at the beginning of the message
717 message_buf_print
= 0;
722 /* The non-logging version of message. */
724 message_nolog (m
, a1
, a2
, a3
)
726 EMACS_INT a1
, a2
, a3
;
728 Lisp_Object old_log_max
;
729 old_log_max
= Vmessage_log_max
;
730 Vmessage_log_max
= Qnil
;
731 message (m
, a1
, a2
, a3
);
732 Vmessage_log_max
= old_log_max
;
738 message2 (echo_area_glyphs
, echo_area_glyphs_length
,
739 ! NILP (current_buffer
->enable_multibyte_characters
));
747 Lisp_Object mini_window
;
749 /* Choose the minibuffer window for this display.
750 It is the minibuffer window used by the selected frame. */
751 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
752 /* This is the frame that window is in. */
753 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
755 if (! FRAME_VISIBLE_P (f
))
760 redraw_garbaged_frames ();
764 if (echo_area_glyphs
|| minibuf_level
== 0)
768 echo_area_window
= mini_window
;
770 vpos
= XFASTINT (XWINDOW (mini_window
)->top
);
771 get_display_line (f
, vpos
, 0);
773 /* Make sure the columns that overlap a left-hand scroll bar
775 for (i
= 0; i
< FRAME_LEFT_SCROLL_BAR_WIDTH (f
); i
++)
776 f
->desired_glyphs
->glyphs
[vpos
][i
] = SPACEGLYPH
;
778 display_string (XWINDOW (mini_window
), vpos
,
779 echo_area_glyphs
? echo_area_glyphs
: "",
780 echo_area_glyphs
? echo_area_glyphs_length
: -1,
781 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
783 FRAME_WIDTH (f
) + FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
784 message_enable_multibyte
);
786 #if 0 /* This just gets in the way. update_frame does the job. */
787 /* If desired cursor location is on this line, put it at end of text */
788 if (cursor_in_echo_area
)
789 FRAME_CURSOR_Y (f
) = vpos
;
790 if (FRAME_CURSOR_Y (f
) == vpos
)
791 FRAME_CURSOR_X (f
) = FRAME_DESIRED_GLYPHS (f
)->used
[vpos
];
794 /* Fill the rest of the minibuffer window with blank lines. */
799 i
< vpos
+ XFASTINT (XWINDOW (mini_window
)->height
); i
++)
801 get_display_line (f
, i
, 0);
802 /* We don't use FRAME_SCROLL_BAR_WIDTH (f) as the starting
803 hpos, because it is good to clear whatever is behind the
804 scroll bar. This does not affect the scroll bar itself. */
805 display_string (XWINDOW (mini_window
), i
,
808 0, FRAME_WIDTH (f
) + FRAME_SCROLL_BAR_WIDTH (f
),
813 else if (!EQ (mini_window
, selected_window
))
814 windows_or_buffers_changed
++;
816 if (EQ (mini_window
, selected_window
))
817 this_line_bufpos
= 0;
819 previous_echo_glyphs
= echo_area_glyphs
;
822 /* Update frame titles. */
824 #ifdef HAVE_WINDOW_SYSTEM
825 static char frame_title_buf
[512];
826 static char *frame_title_ptr
;
829 store_frame_title (str
, mincol
, maxcol
)
834 if (maxcol
< 0 || maxcol
>= sizeof(frame_title_buf
))
835 maxcol
= sizeof (frame_title_buf
);
836 limit
= &frame_title_buf
[maxcol
];
837 while (*str
!= '\0' && frame_title_ptr
< limit
)
838 *frame_title_ptr
++ = *str
++;
839 while (frame_title_ptr
< &frame_title_buf
[mincol
])
840 *frame_title_ptr
++ = ' ';
841 return frame_title_ptr
- frame_title_buf
;
845 x_consider_frame_title (frame
)
851 FRAME_PTR f
= XFRAME (frame
);
853 if (!(FRAME_WINDOW_P (f
) || FRAME_MINIBUF_ONLY_P (f
) || f
->explicit_name
))
856 /* Do we have more than one visible frame on this X display? */
860 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
862 FRAME_PTR tf
= XFRAME (XCONS (tail
)->car
);
864 if (tf
!= f
&& FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
865 && !FRAME_MINIBUF_ONLY_P (tf
)
866 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
870 multiple_frames
= CONSP (tail
);
873 obuf
= current_buffer
;
874 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
875 fmt
= (FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
);
876 frame_title_ptr
= frame_title_buf
;
877 len
= display_mode_element (XWINDOW (f
->selected_window
), 0, 0, 0,
878 0, sizeof (frame_title_buf
), fmt
);
880 set_buffer_internal (obuf
);
881 /* Set the name only if it's changed. This avoids consing
882 in the common case where it hasn't. (If it turns out that we've
883 already wasted too much time by walking through the list with
884 display_mode_element, then we might need to optimize at a higher
886 if (! STRINGP (f
->name
) || STRING_BYTES (XSTRING (f
->name
)) != len
887 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
888 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
891 #define frame_title_ptr ((char *)0)
892 #define store_frame_title(str, mincol, maxcol) 0
895 /* Prepare for redisplay by updating menu-bar item lists when appropriate.
896 This can call eval. */
901 register struct window
*w
= XWINDOW (selected_window
);
903 struct gcpro gcpro1
, gcpro2
;
905 all_windows
= (update_mode_lines
|| buffer_shared
> 1
906 || windows_or_buffers_changed
);
908 /* Update all frame titles based on their buffer names, etc.
909 We do this before the menu bars so that the buffer-menu
910 will show the up-to-date frame titles.
912 This used to be done after the menu bars, for a reason that
913 was stated as follows but which I do not understand:
914 "We do this after the menu bars so that the frame will first
915 create its menu bar using the name `emacs' if no other name
916 has yet been specified."
917 I think that is no longer a concern. */
918 #ifdef HAVE_WINDOW_SYSTEM
919 if (windows_or_buffers_changed
|| update_mode_lines
)
921 Lisp_Object tail
, frame
;
923 FOR_EACH_FRAME (tail
, frame
)
924 if (FRAME_VISIBLE_P (XFRAME (frame
))
925 || FRAME_ICONIFIED_P (XFRAME (frame
)))
926 x_consider_frame_title (frame
);
930 /* Update the menu bar item lists, if appropriate.
931 This has to be done before any actual redisplay
932 or generation of display lines. */
935 Lisp_Object tail
, frame
;
936 int count
= specpdl_ptr
- specpdl
;
938 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
940 FOR_EACH_FRAME (tail
, frame
)
942 /* If a window on this frame changed size,
943 report that to the user and clear the size-change flag. */
944 if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)))
946 Lisp_Object functions
;
947 /* Clear flag first in case we get error below. */
948 FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)) = 0;
949 functions
= Vwindow_size_change_functions
;
950 GCPRO2 (tail
, functions
);
951 while (CONSP (functions
))
953 call1 (XCONS (functions
)->car
, frame
);
954 functions
= XCONS (functions
)->cdr
;
959 update_menu_bar (XFRAME (frame
), 0);
963 unbind_to (count
, Qnil
);
966 update_menu_bar (selected_frame
, 1);
968 /* Motif needs this. See comment in xmenu.c.
969 Turn it off when pending_menu_activation is not defined. */
971 pending_menu_activation
= 0;
975 /* Do a frame update, taking possible shortcuts into account.
976 This is the main external entry point for redisplay.
978 If the last redisplay displayed an echo area message and that
979 message is no longer requested, we clear the echo area
980 or bring back the minibuffer if that is in use.
982 Do not call eval from within this function.
983 Calls to eval after the call to echo_area_display would confuse
984 the display_line mechanism and would cause a crash.
985 Calls to eval before that point will work most of the time,
986 but can still lose, because this function
987 can be called from signal handlers; with alarms set up;
988 or with synchronous processes running.
990 See Fcall_process; if you called it from here, it could be
991 entered recursively. */
993 static int do_verify_charstarts
;
995 /* Counter is used to clear the face cache
996 no more than once ever 1000 redisplays. */
997 static int clear_face_cache_count
;
999 /* Record the previous terminal frame we displayed. */
1000 static FRAME_PTR previous_terminal_frame
;
1005 redisplay_internal (0);
1008 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay
1009 is not in response to any user action; therefore, we should
1010 preserve the echo area. (Actually, our caller does that job.)
1011 Perhaps in the future avoid recentering windows
1012 if it is not necessary; currently that causes some problems. */
1015 redisplay_internal (preserve_echo_area
)
1016 int preserve_echo_area
;
1018 register struct window
*w
= XWINDOW (selected_window
);
1020 int must_finish
= 0;
1022 register int tlbufpos
, tlendpos
;
1023 struct position pos
;
1024 int number_of_visible_frames
;
1029 #ifdef USE_X_TOOLKIT
1030 if (popup_activated ())
1036 if (! FRAME_WINDOW_P (selected_frame
)
1037 && previous_terminal_frame
!= selected_frame
)
1039 /* Since frames on an ASCII terminal share the same display area,
1040 displaying a different frame means redisplay the whole thing. */
1041 windows_or_buffers_changed
++;
1042 SET_FRAME_GARBAGED (selected_frame
);
1043 XSETFRAME (Vterminal_frame
, selected_frame
);
1045 previous_terminal_frame
= selected_frame
;
1047 /* Set the visible flags for all frames.
1048 Do this before checking for resized or garbaged frames; they want
1049 to know if their frames are visible.
1050 See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */
1052 Lisp_Object tail
, frame
;
1054 number_of_visible_frames
= 0;
1056 FOR_EACH_FRAME (tail
, frame
)
1058 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1060 if (FRAME_VISIBLE_P (XFRAME (frame
)))
1061 number_of_visible_frames
++;
1063 /* Clear out all the display lines in which we will generate the
1064 glyphs to display. */
1065 init_desired_glyphs (XFRAME (frame
));
1069 /* Notice any pending interrupt request to change frame size. */
1070 do_pending_window_change ();
1074 redraw_garbaged_frames ();
1078 prepare_menu_bars ();
1080 if (windows_or_buffers_changed
)
1081 update_mode_lines
++;
1083 /* Detect case that we need to write or remove a star in the mode line. */
1084 if ((SAVE_MODIFF
< MODIFF
) != !NILP (w
->last_had_star
))
1086 w
->update_mode_line
= Qt
;
1087 if (buffer_shared
> 1)
1088 update_mode_lines
++;
1091 /* If %c is in use, update it if needed. */
1092 if (!NILP (w
->column_number_displayed
)
1093 /* This alternative quickly identifies a common case
1094 where no change is needed. */
1095 && !(PT
== XFASTINT (w
->last_point
)
1096 && XFASTINT (w
->last_modified
) >= MODIFF
1097 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1098 && XFASTINT (w
->column_number_displayed
) != current_column ())
1099 w
->update_mode_line
= Qt
;
1101 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
1103 all_windows
= update_mode_lines
|| buffer_shared
> 1;
1105 /* If specs for an arrow have changed, do thorough redisplay
1106 to ensure we remove any arrow that should no longer exist. */
1107 if (! EQ (COERCE_MARKER (Voverlay_arrow_position
), last_arrow_position
)
1108 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
1111 /* Normally the message* functions will have already displayed and
1112 updated the echo area, but the frame may have been trashed, or
1113 the update may have been preempted, so display the echo area
1115 if (echo_area_glyphs
|| previous_echo_glyphs
)
1117 echo_area_display ();
1121 /* If showing region, and mark has changed, must redisplay whole window. */
1122 if (((!NILP (Vtransient_mark_mode
)
1123 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1124 != !NILP (w
->region_showing
))
1125 || (!NILP (w
->region_showing
)
1126 && !EQ (w
->region_showing
,
1127 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
1128 this_line_bufpos
= -1;
1130 tlbufpos
= this_line_bufpos
;
1131 tlendpos
= this_line_endpos
;
1132 if (!all_windows
&& tlbufpos
> 0 && NILP (w
->update_mode_line
)
1133 && !current_buffer
->clip_changed
1134 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
1135 && !FRAME_OBSCURED_P (XFRAME (w
->frame
))
1136 /* Make sure recorded data applies to current buffer, etc */
1137 && this_line_buffer
== current_buffer
1138 && current_buffer
== XBUFFER (w
->buffer
)
1139 && NILP (w
->force_start
)
1140 /* Point must be on the line that we have info recorded about */
1142 && PT
<= Z
- tlendpos
1143 /* All text outside that line, including its final newline,
1144 must be unchanged */
1145 && ((XFASTINT (w
->last_modified
) >= MODIFF
1146 && (XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
))
1147 || (beg_unchanged
>= tlbufpos
- 1
1149 /* If selective display, can't optimize
1150 if the changes start at the beginning of the line. */
1151 && ((INTEGERP (current_buffer
->selective_display
)
1152 && XINT (current_buffer
->selective_display
) > 0
1153 ? (beg_unchanged
>= tlbufpos
1156 && end_unchanged
>= tlendpos
1157 && Z
- GPT
>= tlendpos
)))
1159 int tlbufpos_byte
= CHAR_TO_BYTE (tlbufpos
);
1160 if (tlbufpos
> BEGV
&& FETCH_BYTE (tlbufpos_byte
- 1) != '\n'
1162 || FETCH_BYTE (tlbufpos_byte
) == '\n'))
1163 /* Former continuation line has disappeared by becoming empty */
1165 else if (XFASTINT (w
->last_modified
) < MODIFF
1166 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
1167 || MINI_WINDOW_P (w
))
1169 /* We have to handle the case of continuation around a
1170 wide-column character (See the comment in indent.c around
1173 For instance, in the following case:
1175 -------- Insert --------
1176 K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars.
1177 J_I_ ==> J_I_ `^^' are cursors.
1181 As we have to redraw the line above, we should goto cancel. */
1183 struct position val
;
1185 int opoint
= PT
, opoint_byte
= PT_BYTE
;
1187 scan_newline (tlbufpos
, tlbufpos_byte
, BEGV
, BEGV_BYTE
, -1, 1);
1189 val
= *compute_motion (PT
, 0,
1190 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1193 1 << (BITS_PER_SHORT
- 1),
1194 1 << (BITS_PER_SHORT
- 1),
1195 window_internal_width (w
) - 1,
1196 XINT (w
->hscroll
), 0, w
);
1197 SET_PT_BOTH (opoint
, opoint_byte
);
1198 if (val
.hpos
!= this_line_start_hpos
)
1202 overlay_arrow_seen
= 0;
1203 zv_strings_seen
= 0;
1204 display_text_line (w
, tlbufpos
, tlbufpos_byte
,
1205 this_line_vpos
, this_line_start_hpos
,
1206 pos_tab_offset (w
, tlbufpos
, tlbufpos_byte
), 0);
1207 /* If line contains point, is not continued,
1208 and ends at same distance from eob as before, we win */
1209 if (cursor_vpos
>= 0 && this_line_bufpos
1210 && this_line_endpos
== tlendpos
)
1212 /* If this is not the window's last line,
1213 we must adjust the charstarts of the lines below. */
1214 if (this_line_vpos
+ 1
1215 < XFASTINT (w
->top
) + window_internal_height (w
))
1217 int left
= WINDOW_LEFT_MARGIN (w
);
1218 int *charstart_next_line
1219 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[this_line_vpos
+ 1];
1222 if (Z
- tlendpos
== ZV
)
1223 /* This line ends at end of (accessible part of) buffer.
1224 There is no newline to count. */
1225 adjust
= Z
- tlendpos
- charstart_next_line
[left
];
1227 /* This line ends in a newline.
1228 Must take account of the newline and the rest of the
1229 text that follows. */
1230 adjust
= Z
- tlendpos
+ 1 - charstart_next_line
[left
];
1232 adjust_window_charstarts (w
, this_line_vpos
, adjust
);
1235 if (!WINDOW_FULL_WIDTH_P (w
))
1236 preserve_other_columns (w
);
1242 else if (PT
== XFASTINT (w
->last_point
)
1243 /* Make sure the cursor was last displayed
1244 in this window. Otherwise we have to reposition it. */
1245 && XINT (w
->top
) <= FRAME_CURSOR_Y (selected_frame
)
1246 && (XINT (w
->top
) + XINT (w
->height
)
1247 > FRAME_CURSOR_Y (selected_frame
)))
1251 do_pending_window_change ();
1256 /* If highlighting the region, or if the cursor is in the echo area,
1257 then we can't just move the cursor. */
1258 else if (! (!NILP (Vtransient_mark_mode
)
1259 && !NILP (current_buffer
->mark_active
))
1260 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1261 || highlight_nonselected_windows
)
1262 && NILP (w
->region_showing
)
1263 && !cursor_in_echo_area
)
1265 pos
= *compute_motion (tlbufpos
, 0,
1266 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1268 PT
, 2, - (1 << (BITS_PER_SHORT
- 1)),
1269 window_internal_width (w
) - 1,
1271 pos_tab_offset (w
, tlbufpos
, tlbufpos_byte
),
1275 int width
= window_internal_width (w
) - 1;
1276 FRAME_CURSOR_X (selected_frame
)
1277 = WINDOW_LEFT_MARGIN (w
) + minmax (0, pos
.hpos
, width
);
1278 FRAME_CURSOR_Y (selected_frame
) = this_line_vpos
;
1285 /* Text changed drastically or point moved off of line */
1286 cancel_line (this_line_vpos
, selected_frame
);
1289 this_line_bufpos
= 0;
1290 all_windows
|= buffer_shared
> 1;
1292 clear_face_cache_count
++;
1296 Lisp_Object tail
, frame
;
1299 /* Clear the face cache, only when we do a full redisplay
1300 and not too often either. */
1301 if (clear_face_cache_count
> 1000)
1303 clear_face_cache ();
1304 clear_face_cache_count
= 0;
1308 /* Recompute # windows showing selected buffer.
1309 This will be incremented each time such a window is displayed. */
1312 FOR_EACH_FRAME (tail
, frame
)
1314 FRAME_PTR f
= XFRAME (frame
);
1315 if (FRAME_WINDOW_P (f
) || f
== selected_frame
)
1318 /* Mark all the scroll bars to be removed; we'll redeem the ones
1319 we want when we redisplay their windows. */
1320 if (condemn_scroll_bars_hook
)
1321 (*condemn_scroll_bars_hook
) (f
);
1323 if (FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
1324 redisplay_windows (FRAME_ROOT_WINDOW (f
), preserve_echo_area
);
1326 /* Any scroll bars which redisplay_windows should have nuked
1327 should now go away. */
1328 if (judge_scroll_bars_hook
)
1329 (*judge_scroll_bars_hook
) (f
);
1333 else if (FRAME_VISIBLE_P (selected_frame
) && !FRAME_OBSCURED_P (selected_frame
))
1335 redisplay_window (selected_window
, 1, preserve_echo_area
);
1336 if (!WINDOW_FULL_WIDTH_P (w
))
1337 preserve_other_columns (w
);
1341 /* Prevent various kinds of signals during display update.
1342 stdio is not robust about handling signals,
1343 which can cause an apparent I/O error. */
1344 if (interrupt_input
)
1354 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1358 if (!FRAMEP (XCONS (tail
)->car
))
1361 f
= XFRAME (XCONS (tail
)->car
);
1363 if ((FRAME_WINDOW_P (f
) || f
== selected_frame
)
1364 && FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
1366 pause
|= update_frame (f
, 0, 0);
1369 mark_window_display_accurate (f
->root_window
, 1);
1370 if (frame_up_to_date_hook
!= 0)
1371 (*frame_up_to_date_hook
) (f
);
1378 if (FRAME_VISIBLE_P (selected_frame
) && !FRAME_OBSCURED_P (selected_frame
))
1379 pause
= update_frame (selected_frame
, 0, 0);
1383 /* We may have called echo_area_display at the top of this
1384 function. If the echo area is on another frame, that may
1385 have put text on a frame other than the selected one, so the
1386 above call to update_frame would not have caught it. Catch
1389 Lisp_Object mini_window
;
1390 FRAME_PTR mini_frame
;
1392 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
1393 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
1395 if (mini_frame
!= selected_frame
&& FRAME_WINDOW_P (mini_frame
))
1396 pause
|= update_frame (mini_frame
, 0, 0);
1400 /* If frame does not match, prevent doing single-line-update next time.
1401 Also, don't forget to check every line to update the arrow. */
1404 this_line_bufpos
= 0;
1405 if (!NILP (last_arrow_position
))
1407 last_arrow_position
= Qt
;
1408 last_arrow_string
= Qt
;
1410 /* If we pause after scrolling, some lines in current_frame
1411 may be null, so preserve_other_columns won't be able to
1412 preserve all the vertical-bar separators. So, avoid using it
1414 if (!WINDOW_FULL_WIDTH_P (w
))
1415 update_mode_lines
= 1;
1418 /* Now text on frame agrees with windows, so
1419 put info into the windows for partial redisplay to follow */
1423 register struct buffer
*b
= XBUFFER (w
->buffer
);
1425 blank_end_of_window
= 0;
1426 unchanged_modified
= BUF_MODIFF (b
);
1427 overlay_unchanged_modified
= BUF_OVERLAY_MODIFF (b
);
1428 beg_unchanged
= BUF_GPT (b
) - BUF_BEG (b
);
1429 end_unchanged
= BUF_Z (b
) - BUF_GPT (b
);
1431 XSETFASTINT (w
->last_point
, BUF_PT (b
));
1432 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (selected_frame
));
1433 XSETFASTINT (w
->last_point_y
, FRAME_CURSOR_Y (selected_frame
));
1436 mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame
), 1);
1439 b
->clip_changed
= 0;
1440 w
->update_mode_line
= Qnil
;
1441 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
1442 XSETFASTINT (w
->last_overlay_modified
, BUF_OVERLAY_MODIFF (b
));
1444 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1447 /* Record if we are showing a region, so can make sure to
1448 update it fully at next redisplay. */
1449 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1450 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1451 || highlight_nonselected_windows
)
1452 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1453 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1456 w
->window_end_valid
= w
->buffer
;
1457 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1458 last_arrow_string
= Voverlay_arrow_string
;
1459 if (do_verify_charstarts
)
1460 verify_charstarts (w
);
1461 if (frame_up_to_date_hook
!= 0)
1462 (*frame_up_to_date_hook
) (selected_frame
);
1464 update_mode_lines
= 0;
1465 windows_or_buffers_changed
= 0;
1468 /* Start SIGIO interrupts coming again.
1469 Having them off during the code above
1470 makes it less likely one will discard output,
1471 but not impossible, since there might be stuff
1472 in the system buffer here.
1473 But it is much hairier to try to do anything about that. */
1475 if (interrupt_input
)
1479 /* If something has become visible now which was not before,
1480 redisplay again, so that we get them. */
1483 Lisp_Object tail
, frame
;
1486 FOR_EACH_FRAME (tail
, frame
)
1488 int this_is_visible
= 0;
1490 if (XFRAME (frame
)->visible
)
1491 this_is_visible
= 1;
1492 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1493 if (XFRAME (frame
)->visible
)
1494 this_is_visible
= 1;
1496 if (this_is_visible
)
1500 if (new_count
!= number_of_visible_frames
)
1501 windows_or_buffers_changed
++;
1504 /* Change frame size now if a change is pending. */
1505 do_pending_window_change ();
1507 /* If we just did a pending size change, or have additional
1508 visible frames, redisplay again. */
1509 if (windows_or_buffers_changed
&& !pause
)
1513 /* Redisplay, but leave alone any recent echo area message
1514 unless another message has been requested in its place.
1516 This is useful in situations where you need to redisplay but no
1517 user action has occurred, making it inappropriate for the message
1518 area to be cleared. See tracking_off and
1519 wait_reading_process_input for examples of these situations. */
1522 redisplay_preserve_echo_area ()
1524 if (echo_area_glyphs
== 0 && previous_echo_glyphs
!= 0)
1526 echo_area_glyphs
= previous_echo_glyphs
;
1527 redisplay_internal (1);
1528 echo_area_glyphs
= 0;
1531 redisplay_internal (1);
1535 mark_window_display_accurate (window
, flag
)
1539 register struct window
*w
;
1541 for (;!NILP (window
); window
= w
->next
)
1543 if (!WINDOWP (window
)) abort ();
1544 w
= XWINDOW (window
);
1546 if (!NILP (w
->buffer
))
1548 XSETFASTINT (w
->last_modified
,
1549 !flag
? 0 : BUF_MODIFF (XBUFFER (w
->buffer
)));
1550 XSETFASTINT (w
->last_overlay_modified
,
1551 !flag
? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w
->buffer
)));
1553 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1556 /* Record if we are showing a region, so can make sure to
1557 update it fully at next redisplay. */
1558 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1559 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1560 || highlight_nonselected_windows
)
1561 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1562 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1566 w
->window_end_valid
= w
->buffer
;
1567 w
->update_mode_line
= Qnil
;
1568 if (!NILP (w
->buffer
) && flag
)
1569 XBUFFER (w
->buffer
)->clip_changed
= 0;
1571 if (!NILP (w
->vchild
))
1572 mark_window_display_accurate (w
->vchild
, flag
);
1573 if (!NILP (w
->hchild
))
1574 mark_window_display_accurate (w
->hchild
, flag
);
1579 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1580 last_arrow_string
= Voverlay_arrow_string
;
1584 /* t is unequal to any useful value of Voverlay_arrow_... */
1585 last_arrow_position
= Qt
;
1586 last_arrow_string
= Qt
;
1590 /* Update the menu bar item list for frame F.
1591 This has to be done before we start to fill in any display lines,
1592 because it can call eval.
1594 If SAVE_MATCH_DATA is 1, we must save and restore it here. */
1597 update_menu_bar (f
, save_match_data
)
1599 int save_match_data
;
1601 struct buffer
*old
= current_buffer
;
1603 register struct window
*w
;
1605 window
= FRAME_SELECTED_WINDOW (f
);
1606 w
= XWINDOW (window
);
1608 if (update_mode_lines
)
1609 w
->update_mode_line
= Qt
;
1611 if (FRAME_WINDOW_P (f
)
1613 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1614 FRAME_EXTERNAL_MENU_BAR (f
)
1616 FRAME_MENU_BAR_LINES (f
) > 0
1618 : FRAME_MENU_BAR_LINES (f
) > 0)
1620 /* If the user has switched buffers or windows, we need to
1621 recompute to reflect the new bindings. But we'll
1622 recompute when update_mode_lines is set too; that means
1623 that people can use force-mode-line-update to request
1624 that the menu bar be recomputed. The adverse effect on
1625 the rest of the redisplay algorithm is about the same as
1626 windows_or_buffers_changed anyway. */
1627 if (windows_or_buffers_changed
1628 || !NILP (w
->update_mode_line
)
1629 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1630 < BUF_MODIFF (XBUFFER (w
->buffer
)))
1631 != !NILP (w
->last_had_star
))
1632 || ((!NILP (Vtransient_mark_mode
)
1633 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1634 != !NILP (w
->region_showing
)))
1636 struct buffer
*prev
= current_buffer
;
1637 int count
= specpdl_ptr
- specpdl
;
1639 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1640 if (save_match_data
)
1641 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
1642 if (NILP (Voverriding_local_map_menu_flag
))
1644 specbind (Qoverriding_terminal_local_map
, Qnil
);
1645 specbind (Qoverriding_local_map
, Qnil
);
1648 /* Run the Lucid hook. */
1649 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
1650 /* If it has changed current-menubar from previous value,
1651 really recompute the menubar from the value. */
1652 if (! NILP (Vlucid_menu_bar_dirty_flag
))
1653 call0 (Qrecompute_lucid_menubar
);
1654 safe_run_hooks (Qmenu_bar_update_hook
);
1655 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
1656 /* Redisplay the menu bar in case we changed it. */
1657 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1658 if (FRAME_WINDOW_P (f
))
1659 set_frame_menubar (f
, 0, 0);
1661 /* On a terminal screen, the menu bar is an ordinary screen
1662 line, and this makes it get updated. */
1663 w
->update_mode_line
= Qt
;
1664 #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1665 /* In the non-toolkit version, the menu bar is an ordinary screen
1666 line, and this makes it get updated. */
1667 w
->update_mode_line
= Qt
;
1668 #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1670 unbind_to (count
, Qnil
);
1671 set_buffer_internal_1 (prev
);
1678 /* Redisplay WINDOW and its subwindows and siblings. */
1681 redisplay_windows (window
, preserve_echo_area
)
1683 int preserve_echo_area
;
1685 for (; !NILP (window
); window
= XWINDOW (window
)->next
)
1686 redisplay_window (window
, 0, preserve_echo_area
);
1689 /* Return value in display table DP (Lisp_Char_Table *) for character
1690 C. Since a display table doesn't have any parent, we don't have to
1691 follow parent. Do not call this function directly but use the
1692 macro DISP_CHAR_VECTOR. */
1694 disp_char_vector (dp
, c
)
1695 struct Lisp_Char_Table
*dp
;
1701 if (SINGLE_BYTE_CHAR_P (c
)) return (dp
->contents
[c
]);
1703 SPLIT_NON_ASCII_CHAR (c
, code
[0], code
[1], code
[2]);
1704 if (code
[0] != CHARSET_COMPOSITION
)
1706 if (code
[1] < 32) code
[1] = -1;
1707 else if (code
[2] < 32) code
[2] = -1;
1709 /* Here, the possible range of CODE[0] (== charset ID) is
1710 128..MAX_CHARSET. Since the top level char table contains data
1711 for multibyte characters after 256th element, we must increment
1712 CODE[0] by 128 to get a correct index. */
1714 code
[3] = -1; /* anchor */
1716 for (i
= 0; code
[i
] >= 0; i
++, dp
= XCHAR_TABLE (val
))
1718 val
= dp
->contents
[code
[i
]];
1719 if (!SUB_CHAR_TABLE_P (val
))
1720 return (NILP (val
) ? dp
->defalt
: val
);
1722 /* Here, VAL is a sub char table. We return the default value of it. */
1723 return (dp
->defalt
);
1726 /* Redisplay window WINDOW and its subwindows. */
1729 redisplay_window (window
, just_this_one
, preserve_echo_area
)
1731 int just_this_one
, preserve_echo_area
;
1733 register struct window
*w
= XWINDOW (window
);
1734 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
1737 int lpoint_byte
= PT_BYTE
;
1738 struct buffer
*old
= current_buffer
;
1739 register int width
= window_internal_width (w
) - 1;
1740 register int startp
, startp_byte
;
1741 register int hscroll
= XINT (w
->hscroll
);
1742 struct position pos
;
1744 int opoint_byte
= PT_BYTE
;
1746 int update_mode_line
;
1747 struct Lisp_Char_Table
*dp
= window_display_table (w
);
1748 int really_switched_buffer
= 0;
1749 int count
= specpdl_ptr
- specpdl
;
1751 if (Z
== Z_BYTE
&& lpoint
!= lpoint_byte
)
1753 if (lpoint_byte
< lpoint
)
1756 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1758 /* If this is a combination window, do its children; that's all. */
1760 if (!NILP (w
->vchild
))
1762 redisplay_windows (w
->vchild
, preserve_echo_area
);
1765 if (!NILP (w
->hchild
))
1767 redisplay_windows (w
->hchild
, preserve_echo_area
);
1770 if (NILP (w
->buffer
))
1773 specbind (Qinhibit_point_motion_hooks
, Qt
);
1775 height
= window_internal_height (w
);
1776 update_mode_line
= (!NILP (w
->update_mode_line
) || update_mode_lines
);
1777 if (XBUFFER (w
->buffer
)->clip_changed
)
1778 update_mode_line
= 1;
1780 if (MINI_WINDOW_P (w
))
1782 if (w
== XWINDOW (echo_area_window
) && echo_area_glyphs
)
1783 /* We've already displayed the echo area glyphs in this window. */
1784 goto finish_scroll_bars
;
1785 else if (w
!= XWINDOW (minibuf_window
))
1787 /* This is a minibuffer, but it's not the currently active one,
1789 int vpos
= XFASTINT (w
->top
);
1792 for (i
= 0; i
< height
; i
++)
1794 get_display_line (f
, vpos
+ i
, 0);
1795 display_string (w
, vpos
+ i
, "", 0,
1796 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
1800 goto finish_scroll_bars
;
1804 /* Otherwise set up data on this window; select its buffer and point value */
1806 if (update_mode_line
)
1807 /* Really select the buffer, for the sake of buffer-local variables. */
1809 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1810 really_switched_buffer
= 1;
1813 set_buffer_temp (XBUFFER (w
->buffer
));
1816 opoint_byte
= PT_BYTE
;
1818 if (Z
== Z_BYTE
&& opoint
!= opoint_byte
)
1820 if (opoint_byte
< opoint
)
1823 /* If %c is in mode line, update it if needed. */
1824 if (!NILP (w
->column_number_displayed
)
1825 /* This alternative quickly identifies a common case
1826 where no change is needed. */
1827 && !(PT
== XFASTINT (w
->last_point
)
1828 && XFASTINT (w
->last_modified
) >= MODIFF
1829 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1830 && XFASTINT (w
->column_number_displayed
) != current_column ())
1831 update_mode_line
= 1;
1833 /* Count number of windows showing the selected buffer.
1834 An indirect buffer counts as its base buffer. */
1838 struct buffer
*current_base
, *window_base
;
1839 current_base
= current_buffer
;
1840 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
1841 if (current_base
->base_buffer
)
1842 current_base
= current_base
->base_buffer
;
1843 if (window_base
->base_buffer
)
1844 window_base
= window_base
->base_buffer
;
1845 if (current_base
== window_base
)
1849 /* POINT refers normally to the selected window.
1850 For any other window, set up appropriate value. */
1852 if (!EQ (window
, selected_window
))
1854 int new_pt
= XMARKER (w
->pointm
)->charpos
;
1855 int new_pt_byte
= marker_byte_position (w
->pointm
);
1859 new_pt_byte
= BEGV_BYTE
;
1860 set_marker_both (w
->pointm
, Qnil
, BEGV
, BEGV_BYTE
);
1862 else if (new_pt
> (ZV
- 1))
1865 new_pt_byte
= ZV_BYTE
;
1866 set_marker_both (w
->pointm
, Qnil
, ZV
, ZV_BYTE
);
1868 /* We don't use SET_PT so that the point-motion hooks don't run. */
1869 TEMP_SET_PT_BOTH (new_pt
, new_pt_byte
);
1872 /* If any of the character widths specified in the display table
1873 have changed, invalidate the width run cache. It's true that this
1874 may be a bit late to catch such changes, but the rest of
1875 redisplay goes (non-fatally) haywire when the display table is
1876 changed, so why should we worry about doing any better? */
1877 if (current_buffer
->width_run_cache
)
1879 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
1881 if (! disptab_matches_widthtab (disptab
,
1882 XVECTOR (current_buffer
->width_table
)))
1884 invalidate_region_cache (current_buffer
,
1885 current_buffer
->width_run_cache
,
1887 recompute_width_table (current_buffer
, disptab
);
1891 /* If window-start is screwed up, choose a new one. */
1892 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
1895 startp
= marker_position (w
->start
);
1896 startp_byte
= marker_byte_position (w
->start
);
1898 /* If someone specified a new starting point but did not insist,
1899 check whether it can be used. */
1900 if (!NILP (w
->optional_new_start
))
1902 w
->optional_new_start
= Qnil
;
1903 /* Check whether this start pos is usable given where point is. */
1905 pos
= *compute_motion (startp
, 0,
1906 (((EQ (window
, minibuf_window
)
1908 ? minibuf_prompt_width
: 0)
1909 + (hscroll
? 1 - hscroll
: 0)),
1912 /* BUG FIX: See the comment of
1913 Fpos_visible_in_window_p (window.c). */
1914 - (1 << (BITS_PER_SHORT
- 1)),
1916 pos_tab_offset (w
, startp
, startp_byte
), w
);
1917 /* If PT does fit on the screen, we will use this start pos,
1918 so do so by setting force_start. */
1919 if (pos
.bufpos
== PT
)
1920 w
->force_start
= Qt
;
1923 /* Handle case where place to start displaying has been specified,
1924 unless the specified location is outside the accessible range. */
1925 if (!NILP (w
->force_start
))
1927 w
->force_start
= Qnil
;
1928 /* Forget any recorded base line for line number display. */
1929 w
->base_line_number
= Qnil
;
1930 /* Redisplay the mode line. Select the buffer properly for that.
1931 Also, run the hook window-scroll-functions
1932 because we have scrolled. */
1933 /* Note, we do this after clearing force_start because
1934 if there's an error, it is better to forget about force_start
1935 than to get into an infinite loop calling the hook functions
1936 and having them get more errors. */
1937 if (!update_mode_line
1938 || ! NILP (Vwindow_scroll_functions
))
1940 Lisp_Object temp
[3];
1942 if (!really_switched_buffer
)
1944 set_buffer_temp (old
);
1945 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1947 really_switched_buffer
= 1;
1948 update_mode_line
= 1;
1949 w
->update_mode_line
= Qt
;
1950 if (! NILP (Vwindow_scroll_functions
))
1952 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1953 make_number (startp
));
1954 startp
= marker_position (w
->start
);
1955 startp_byte
= marker_byte_position (w
->start
);
1958 XSETFASTINT (w
->last_modified
, 0);
1959 XSETFASTINT (w
->last_overlay_modified
, 0);
1960 if (startp
< BEGV
) startp
= BEGV
, startp_byte
= BEGV_BYTE
;
1961 if (startp
> ZV
) startp
= ZV
, startp
= ZV_BYTE
;
1962 try_window (window
, startp
);
1963 if (cursor_vpos
< 0)
1965 /* If point does not appear, move point so it does appear */
1966 pos
= *compute_motion (startp
, 0,
1967 (((EQ (window
, minibuf_window
)
1969 ? minibuf_prompt_width
: 0)
1970 + (hscroll
? 1 - hscroll
: 0)),
1973 - (1 << (BITS_PER_SHORT
- 1)),
1975 pos_tab_offset (w
, startp
, startp_byte
),
1977 TEMP_SET_PT_BOTH (pos
.bufpos
, pos
.bytepos
);
1978 if (w
!= XWINDOW (selected_window
))
1979 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
1982 if (current_buffer
== old
)
1985 lpoint_byte
= PT_BYTE
;
1987 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
1988 + minmax (0, pos
.hpos
, width
));
1989 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1991 /* If we are highlighting the region,
1992 then we just changed the region, so redisplay to show it. */
1993 if (!NILP (Vtransient_mark_mode
)
1994 && !NILP (current_buffer
->mark_active
))
1996 cancel_my_columns (XWINDOW (window
));
1997 try_window (window
, startp
);
2003 /* Handle case where text has not changed, only point,
2004 and it has not moved off the frame. */
2006 /* This code is not used for minibuffer for the sake of
2007 the case of redisplaying to replace an echo area message;
2008 since in that case the minibuffer contents per se are usually unchanged.
2009 This code is of no real use in the minibuffer since
2010 the handling of this_line_bufpos, etc.,
2011 in redisplay handles the same cases. */
2013 if (XFASTINT (w
->last_modified
) >= MODIFF
2014 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
2015 && PT
>= startp
&& !current_buffer
->clip_changed
2016 && (just_this_one
|| WINDOW_FULL_WIDTH_P (w
))
2017 /* If force-mode-line-update was called, really redisplay;
2018 that's how redisplay is forced after e.g. changing
2019 buffer-invisibility-spec. */
2020 && NILP (w
->update_mode_line
)
2021 /* Can't use this case if highlighting a region. */
2022 && !(!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
2023 && NILP (w
->region_showing
)
2024 /* If end pos is out of date, scroll bar and percentage will be wrong */
2025 && INTEGERP (w
->window_end_vpos
)
2026 && XFASTINT (w
->window_end_vpos
) < XFASTINT (w
->height
)
2027 && !EQ (window
, minibuf_window
)
2028 && (!MARKERP (Voverlay_arrow_position
)
2029 || current_buffer
!= XMARKER (Voverlay_arrow_position
)->buffer
))
2031 /* All positions in this clause are relative to the window edge. */
2033 int this_scroll_margin
= scroll_margin
;
2034 int last_point_y
= XFASTINT (w
->last_point_y
) - XINT (w
->top
);
2035 int last_point_x
= (XFASTINT (w
->last_point_x
) - WINDOW_LEFT_MARGIN (w
));
2037 /* Find where PT is located now on the frame. */
2038 /* Check just_this_one as a way of verifying that the
2039 window edges have not changed. */
2040 if (PT
== XFASTINT (w
->last_point
) && just_this_one
2041 /* If CURSOR_IN_ECHO_AREA, last_point_x and last_point_y
2042 refer to the echo area and are not related to this window. */
2043 && ! cursor_in_echo_area
)
2045 pos
.hpos
= last_point_x
;
2046 pos
.vpos
= last_point_y
;
2049 else if (PT
> XFASTINT (w
->last_point
)
2050 && ! cursor_in_echo_area
2051 && XFASTINT (w
->last_point
) > startp
&& just_this_one
2052 /* We can't use this if point is in the left margin of a
2053 hscrolled window, because w->last_point_x has been
2054 clipped to the window edges. */
2055 && !(last_point_x
<= 0 && hscroll
))
2057 int last_point
= XFASTINT (w
->last_point
);
2058 int last_point_byte
= CHAR_TO_BYTE (last_point
);
2059 int tab_offset
= (pos_tab_offset (w
, last_point
, last_point_byte
)
2060 - (last_point_x
+ hscroll
- !! hscroll
));
2062 pos
= *compute_motion (last_point
, last_point_y
, last_point_x
, 0,
2064 /* BUG FIX: See the comment of
2065 Fpos_visible_in_window_p (window.c). */
2066 - (1 << (BITS_PER_SHORT
- 1)),
2073 pos
= *compute_motion (startp
, 0, (hscroll
? 1 - hscroll
: 0), 0,
2075 /* BUG FIX: See the comment of
2076 Fpos_visible_in_window_p (window.c). */
2077 - (1 << (BITS_PER_SHORT
- 1)),
2079 pos_tab_offset (w
, startp
, startp_byte
),
2083 /* Don't use a scroll margin that is negative or too large. */
2084 if (this_scroll_margin
< 0)
2085 this_scroll_margin
= 0;
2087 if (XINT (w
->height
) < 4 * scroll_margin
)
2088 this_scroll_margin
= XINT (w
->height
) / 4;
2090 /* If point fits on the screen, and not within the scroll margin,
2092 if (pos
.vpos
< height
- this_scroll_margin
2093 && (pos
.vpos
>= this_scroll_margin
|| startp
== BEGV
))
2095 /* Ok, point is still on frame */
2096 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
2098 /* These variables are supposed to be origin 1 */
2099 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
2100 + minmax (0, pos
.hpos
, width
));
2101 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
2103 /* This doesn't do the trick, because if a window to the right of
2104 this one must be redisplayed, this does nothing because there
2105 is nothing in DesiredFrame yet, and then the other window is
2106 redisplayed, making likes that are empty in this window's columns.
2107 if (WINDOW_FULL_WIDTH_P (w))
2108 preserve_my_columns (w);
2110 if (current_buffer
->clip_changed
2111 && ! NILP (Vwindow_scroll_functions
))
2112 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2113 make_number (marker_position (w
->start
)));
2117 /* Don't bother trying redisplay with same start;
2118 we already know it will lose. */
2120 /* If current starting point was originally the beginning of a line
2121 but no longer is, find a new starting point. */
2122 else if (!NILP (w
->start_at_line_beg
)
2124 || FETCH_BYTE (startp_byte
- 1) == '\n'))
2128 else if (just_this_one
&& !MINI_WINDOW_P (w
)
2130 && XFASTINT (w
->last_modified
)
2131 /* or else vmotion on first line won't work. */
2132 && ! NILP (w
->start_at_line_beg
)
2133 && ! EQ (w
->window_end_valid
, Qnil
)
2134 && do_id
&& !current_buffer
->clip_changed
2135 && !blank_end_of_window
2136 && WINDOW_FULL_WIDTH_P (w
)
2137 /* Can't use this case if highlighting a region. */
2138 && !(!NILP (Vtransient_mark_mode
)
2139 && !NILP (current_buffer
->mark_active
))
2140 /* Don't use try_window_id if newline
2141 doesn't display as the end of a line. */
2142 && !(dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, '\n')))
2143 && NILP (w
->region_showing
)
2144 && EQ (last_arrow_position
, COERCE_MARKER (Voverlay_arrow_position
))
2145 && EQ (last_arrow_string
, Voverlay_arrow_string
)
2146 && (tem
= try_window_id (FRAME_SELECTED_WINDOW (f
)))
2149 /* tem > 0 means success. tem == -1 means choose new start.
2150 tem == -2 means try again with same start,
2151 and nothing but whitespace follows the changed stuff.
2152 tem == 0 means try again with same start. */
2156 else if (startp
>= BEGV
&& startp
<= ZV
2158 /* Avoid starting at end of buffer. */
2159 #if 0 /* This change causes trouble for M-! finger & RET.
2160 It will have to be considered later. */
2161 || ! EQ (window
, selected_window
)
2162 /* Don't do the recentering if redisplay
2163 is not for no user action. */
2164 || preserve_echo_area
2167 || (XFASTINT (w
->last_modified
) >= MODIFF
2168 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
2170 /* Try to redisplay starting at same place as before */
2171 /* If point has not moved off frame, accept the results */
2172 try_window (window
, startp
);
2173 if (cursor_vpos
>= 0)
2175 if (!just_this_one
|| current_buffer
->clip_changed
2176 || beg_unchanged
< startp
)
2177 /* Forget any recorded base line for line number display. */
2178 w
->base_line_number
= Qnil
;
2180 if (current_buffer
->clip_changed
2181 && ! NILP (Vwindow_scroll_functions
))
2182 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2183 make_number (marker_position (w
->start
)));
2188 cancel_my_columns (w
);
2191 XSETFASTINT (w
->last_modified
, 0);
2192 XSETFASTINT (w
->last_overlay_modified
, 0);
2193 /* Redisplay the mode line. Select the buffer properly for that. */
2194 if (!update_mode_line
)
2196 if (!really_switched_buffer
)
2198 set_buffer_temp (old
);
2199 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2201 update_mode_line
= 1;
2202 w
->update_mode_line
= Qt
;
2205 /* Try to scroll by specified few lines */
2207 if ((scroll_conservatively
|| scroll_step
)
2208 && !current_buffer
->clip_changed
2209 && startp
>= BEGV
&& startp
<= ZV
)
2211 int this_scroll_margin
= scroll_margin
;
2212 int scroll_margin_pos
, scroll_margin_bytepos
;
2213 int scroll_max
= scroll_step
;
2214 if (scroll_conservatively
)
2215 scroll_max
= scroll_conservatively
;
2217 /* Don't use a scroll margin that is negative or too large. */
2218 if (this_scroll_margin
< 0)
2219 this_scroll_margin
= 0;
2221 if (XINT (w
->height
) < 4 * this_scroll_margin
)
2222 this_scroll_margin
= XINT (w
->height
) / 4;
2224 scroll_margin_pos
= Z
- XFASTINT (w
->window_end_pos
);
2225 if (this_scroll_margin
)
2227 pos
= *vmotion (scroll_margin_pos
, -this_scroll_margin
, w
);
2228 scroll_margin_pos
= pos
.bufpos
;
2229 scroll_margin_bytepos
= pos
.bytepos
;
2232 scroll_margin_bytepos
= CHAR_TO_BYTE (scroll_margin_pos
);
2234 if (PT
>= scroll_margin_pos
)
2236 struct position pos
;
2237 pos
= *compute_motion (scroll_margin_pos
, 0, 0, 0,
2238 PT
, XFASTINT (w
->height
), 0,
2239 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2240 pos_tab_offset (w
, scroll_margin_pos
,
2241 scroll_margin_bytepos
),
2243 if (pos
.vpos
>= scroll_max
)
2246 pos
= *vmotion (startp
,
2247 scroll_conservatively
? pos
.vpos
+ 1 : scroll_step
,
2250 if (! NILP (Vwindow_scroll_functions
))
2252 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2253 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2254 make_number (pos
.bufpos
));
2255 pos
.bufpos
= marker_position (w
->start
);
2257 try_window (window
, pos
.bufpos
);
2258 if (cursor_vpos
>= 0)
2260 if (!just_this_one
|| current_buffer
->clip_changed
2261 || beg_unchanged
< startp
)
2262 /* Forget any recorded base line for line number display. */
2263 w
->base_line_number
= Qnil
;
2267 cancel_my_columns (w
);
2270 scroll_margin_pos
= startp
;
2271 if (this_scroll_margin
)
2273 pos
= *vmotion (scroll_margin_pos
, this_scroll_margin
, w
);
2274 scroll_margin_pos
= pos
.bufpos
;
2276 if (PT
< scroll_margin_pos
)
2278 struct position pos
;
2279 pos
= *compute_motion (PT
, 0, 0, 0,
2280 scroll_margin_pos
, XFASTINT (w
->height
), 0,
2281 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2282 pos_tab_offset (w
, PT
, PT_BYTE
),
2284 if (pos
.vpos
> scroll_max
)
2287 pos
= *vmotion (startp
,
2288 scroll_conservatively
? -pos
.vpos
: - scroll_step
,
2291 if (! NILP (Vwindow_scroll_functions
))
2293 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2294 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2295 make_number (pos
.bufpos
));
2296 pos
.bufpos
= marker_position (w
->start
);
2298 try_window (window
, pos
.bufpos
);
2299 if (cursor_vpos
>= 0)
2301 if (!just_this_one
|| current_buffer
->clip_changed
2302 || beg_unchanged
< startp
)
2303 /* Forget any recorded base line for line number display. */
2304 w
->base_line_number
= Qnil
;
2308 cancel_my_columns (w
);
2314 if (scroll_step
&& ! scroll_margin
&& !current_buffer
->clip_changed
2315 && startp
>= BEGV
&& startp
<= ZV
)
2317 if (margin_call
== 0)
2318 margin_call
= (PT
> startp
? 1 : -1);
2319 if (margin_call
> 0)
2321 pos
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), scroll_step
, w
);
2322 if (pos
.vpos
>= height
)
2326 pos
= *vmotion (startp
, (margin_call
< 0 ? - scroll_step
: scroll_step
),
2329 if (PT
>= pos
.bufpos
)
2331 if (! NILP (Vwindow_scroll_functions
))
2333 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2334 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2335 make_number (pos
.bufpos
));
2336 pos
.bufpos
= marker_position (w
->start
);
2338 try_window (window
, pos
.bufpos
);
2339 if (cursor_vpos
>= 0)
2341 if (!just_this_one
|| current_buffer
->clip_changed
2342 || beg_unchanged
< startp
)
2343 /* Forget any recorded base line for line number display. */
2344 w
->base_line_number
= Qnil
;
2348 cancel_my_columns (w
);
2354 /* Finally, just choose place to start which centers point */
2357 /* Forget any previously recorded base line for line number display. */
2358 w
->base_line_number
= Qnil
;
2360 pos
= *vmotion (PT
, - (height
/ 2), w
);
2362 /* The minibuffer is often just one line. Ordinary scrolling
2363 gives little overlap and looks bad. So show 20 chars before point. */
2365 && (pos
.bufpos
>= PT
- minibuffer_scroll_overlap
2366 /* If we scrolled less than 1/2 line forward, we will
2367 get too much overlap, so change to the usual amount. */
2368 || pos
.bufpos
< startp
+ width
/ 2)
2369 && PT
> BEGV
+ minibuffer_scroll_overlap
2370 /* If we scrolled to an actual line boundary,
2371 that's different; don't ignore line boundaries. */
2372 && FETCH_BYTE (pos
.bytepos
- 1) != '\n')
2374 pos
.bufpos
= PT
- minibuffer_scroll_overlap
;
2375 pos
.bytepos
= CHAR_TO_BYTE (pos
.bufpos
);
2378 /* Set startp here explicitly in case that helps avoid an infinite loop
2379 in case the window-scroll-functions functions get errors. */
2380 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2381 if (! NILP (Vwindow_scroll_functions
))
2383 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2384 make_number (pos
.bufpos
));
2385 pos
.bufpos
= marker_position (w
->start
);
2386 pos
.bytepos
= marker_byte_position (w
->start
);
2388 try_window (window
, pos
.bufpos
);
2390 startp
= marker_position (w
->start
);
2391 startp_byte
= marker_byte_position (w
->start
);
2392 w
->start_at_line_beg
2393 = (startp
== BEGV
|| FETCH_BYTE (startp_byte
- 1) == '\n') ? Qt
: Qnil
;
2396 if ((update_mode_line
2397 /* If window not full width, must redo its mode line
2398 if the window to its side is being redone */
2399 || (!just_this_one
&& !WINDOW_FULL_WIDTH_P (w
))
2400 || INTEGERP (w
->base_line_pos
)
2401 || (!NILP (w
->column_number_displayed
)
2402 && XFASTINT (w
->column_number_displayed
) != current_column ()))
2403 && height
!= XFASTINT (w
->height
))
2405 FRAME_PTR oframe
= selected_frame
;
2406 if (!really_switched_buffer
)
2408 set_buffer_temp (old
);
2409 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2410 really_switched_buffer
= 1;
2413 display_mode_line (w
);
2414 selected_frame
= oframe
;
2416 if (! line_number_displayed
2417 && ! BUFFERP (w
->base_line_pos
))
2419 w
->base_line_pos
= Qnil
;
2420 w
->base_line_number
= Qnil
;
2423 /* When we reach a frame's selected window, redo the frame's menu bar. */
2424 if (update_mode_line
2425 && (FRAME_WINDOW_P (f
)
2427 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
2428 FRAME_EXTERNAL_MENU_BAR (f
)
2430 FRAME_MENU_BAR_LINES (f
) > 0
2432 : FRAME_MENU_BAR_LINES (f
) > 0)
2433 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
2434 display_menu_bar (w
);
2437 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2439 int start
, end
, whole
;
2441 /* Calculate the start and end positions for the current window.
2442 At some point, it would be nice to choose between scrollbars
2443 which reflect the whole buffer size, with special markers
2444 indicating narrowing, and scrollbars which reflect only the
2447 Note that minibuffers sometimes aren't displaying any text. */
2448 if (! MINI_WINDOW_P (w
)
2449 || (w
== XWINDOW (minibuf_window
) && ! echo_area_glyphs
))
2452 start
= marker_position (w
->start
) - BEGV
;
2453 /* I don't think this is guaranteed to be right. For the
2454 moment, we'll pretend it is. */
2455 end
= (Z
- XINT (w
->window_end_pos
)) - BEGV
;
2457 if (end
< start
) end
= start
;
2458 if (whole
< (end
- start
)) whole
= end
- start
;
2461 start
= end
= whole
= 0;
2463 /* Indicate what this scroll bar ought to be displaying now. */
2464 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
2466 /* Note that we actually used the scroll bar attached to this window,
2467 so it shouldn't be deleted at the end of redisplay. */
2468 (*redeem_scroll_bar_hook
) (w
);
2471 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
2472 if (really_switched_buffer
)
2473 set_buffer_internal_1 (old
);
2475 set_buffer_temp (old
);
2476 TEMP_SET_PT_BOTH (lpoint
, lpoint_byte
);
2478 unbind_to (count
, Qnil
);
2481 /* Do full redisplay on one window, starting at position `pos'. */
2484 try_window (window
, pos
)
2488 register struct window
*w
= XWINDOW (window
);
2489 register int height
= window_internal_height (w
);
2490 register int vpos
= XFASTINT (w
->top
);
2491 register int last_text_vpos
= vpos
;
2492 FRAME_PTR f
= XFRAME (w
->frame
);
2493 int width
= window_internal_width (w
) - 1;
2494 struct position val
;
2496 /* POS should never be out of range! */
2497 if (pos
< XBUFFER (w
->buffer
)->begv
2498 || pos
> XBUFFER (w
->buffer
)->zv
)
2501 if (XMARKER (w
->start
)->charpos
!= pos
)
2502 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2505 overlay_arrow_seen
= 0;
2506 zv_strings_seen
= 0;
2507 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
2508 val
.ovstring_chars_done
= 0;
2509 val
.bytepos
= marker_byte_position (w
->start
);
2510 val
.tab_offset
= pos_tab_offset (w
, pos
, val
.bytepos
);
2512 while (--height
>= 0)
2514 val
= *display_text_line (w
, pos
, val
.bytepos
, vpos
,
2515 val
.hpos
, val
.tab_offset
,
2516 val
.ovstring_chars_done
);
2517 /* The following code is omitted because we maintain tab_offset
2520 tab_offset
+= width
;
2521 if (val
.vpos
) tab_offset
= 0;
2524 if (pos
!= val
.bufpos
)
2527 #ifdef USE_TEXT_PROPERTIES
2528 Lisp_Object invis_prop
;
2529 invis_prop
= Fget_char_property (make_number (val
.bufpos
- 1),
2530 Qinvisible
, window
);
2531 invis
= TEXT_PROP_MEANS_INVISIBLE (invis_prop
);
2535 /* Next line, unless prev line ended in end of buffer with no cr */
2537 && (FETCH_BYTE (val
.bytepos
- 1) != '\n' || invis
));
2542 /* If last line is continued in middle of character,
2543 include the split character in the text considered on the frame */
2544 if (val
.hpos
< (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
2547 /* If bottom just moved off end of frame, change mode line percentage. */
2548 if (XFASTINT (w
->window_end_pos
) == 0
2550 w
->update_mode_line
= Qt
;
2552 /* Say where last char on frame will be, once redisplay is finished. */
2553 XSETFASTINT (w
->window_end_pos
, Z
- pos
);
2554 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
- XFASTINT (w
->top
));
2555 /* But that is not valid info until redisplay finishes. */
2556 w
->window_end_valid
= Qnil
;
2559 /* Try to redisplay when buffer is modified locally,
2560 computing insert/delete line to preserve text outside
2561 the bounds of the changes.
2562 Return 1 if successful, 0 if if cannot tell what to do,
2563 or -1 to tell caller to find a new window start,
2564 or -2 to tell caller to do normal redisplay with same window start. */
2567 try_window_id (window
)
2571 int opoint
, opoint_byte
;
2572 register struct window
*w
= XWINDOW (window
);
2573 register int height
= window_internal_height (w
);
2574 FRAME_PTR f
= XFRAME (w
->frame
);
2575 int top
= XFASTINT (w
->top
);
2576 int start
= marker_position (w
->start
);
2577 int width
= window_internal_width (w
) - 1;
2578 int hscroll
= XINT (w
->hscroll
);
2579 int lmargin
= hscroll
> 0 ? 1 - hscroll
: 0;
2582 register int i
, tem
;
2583 int last_text_vpos
= 0;
2585 int selective
= (INTEGERP (current_buffer
->selective_display
)
2586 ? XINT (current_buffer
->selective_display
)
2587 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2588 struct position val
, bp
, ep
, xp
, pp
;
2589 int scroll_amount
= 0;
2593 int start_byte
= marker_byte_position (w
->start
);
2595 if (GPT
- BEG
< beg_unchanged
)
2596 beg_unchanged
= GPT
- BEG
;
2597 if (Z
- GPT
< end_unchanged
)
2598 end_unchanged
= Z
- GPT
;
2600 if (beg_unchanged
+ BEG
< start
)
2601 return 0; /* Give up if changes go above top of window */
2603 /* Find position before which nothing is changed. */
2604 bp
= *compute_motion (start
, 0, lmargin
, 0,
2605 min (ZV
, beg_unchanged
+ BEG
), height
,
2606 /* BUG FIX: See the comment of
2607 Fpos_visible_in_window_p (window.c). */
2608 - (1 << (BITS_PER_SHORT
- 1)),
2610 pos_tab_offset (w
, start
, start_byte
),
2612 if (bp
.vpos
>= height
)
2616 /* All changes are beyond the window end, and point is on the screen.
2617 We don't need to change the text at all.
2618 But we need to update window_end_pos to account for
2619 any change in buffer size. */
2620 bp
= *compute_motion (start
, 0, lmargin
, 0,
2622 /* BUG FIX: See the comment of
2623 Fpos_visible_in_window_p() (window.c). */
2624 - (1 << (BITS_PER_SHORT
- 1)),
2626 pos_tab_offset (w
, start
, start_byte
), w
);
2627 XSETFASTINT (w
->window_end_vpos
, height
);
2628 XSETFASTINT (w
->window_end_pos
, Z
- bp
.bufpos
);
2636 /* Find beginning of that frame line. Must display from there. */
2637 bp
= *vmotion (bp
.bufpos
, 0, w
);
2640 pos_byte
= bp
.bytepos
;
2646 /* If about to start displaying at the beginning of a continuation line,
2647 really start with previous frame line, in case it was not
2648 continued when last redisplayed */
2649 if ((bp
.contin
&& bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0)
2651 /* Likewise if we have to worry about selective display. */
2652 (selective
> 0 && bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0))
2654 bp
= *vmotion (bp
.bufpos
, -1, w
);
2657 pos_byte
= bp
.bytepos
;
2659 val
.tab_offset
= bp
.tab_offset
; /* Update tab offset. */
2661 if (bp
.contin
&& bp
.hpos
!= lmargin
)
2663 val
.hpos
= bp
.prevhpos
- width
+ lmargin
;
2664 val
.tab_offset
= bp
.tab_offset
+ bp
.prevhpos
- width
;
2666 DEC_BOTH (pos
, pos_byte
);
2671 /* Find first visible newline after which no more is changed. */
2672 opoint
= PT
, opoint_byte
= PT_BYTE
;
2673 SET_PT (Z
- max (end_unchanged
, Z
- ZV
));
2674 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2676 while (PT
< ZV
- 1 && indented_beyond_p (PT
, PT_BYTE
, selective
))
2677 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2679 SET_PT_BOTH (opoint
, opoint_byte
);
2681 /* Compute the cursor position after that newline. */
2682 ep
= *compute_motion (pos
, vpos
, val
.hpos
, did_motion
, tem
,
2683 height
, - (1 << (BITS_PER_SHORT
- 1)),
2685 /* We have tab offset in VAL, use it. */
2688 /* If changes reach past the text available on the frame,
2689 just display rest of frame. */
2690 if (ep
.bufpos
> Z
- XFASTINT (w
->window_end_pos
))
2693 stop_vpos
= ep
.vpos
;
2695 /* If no newline before ep, the line ep is on includes some changes
2696 that must be displayed. Make sure we don't stop before it. */
2697 /* Also, if changes reach all the way until ep.bufpos,
2698 it is possible that something was deleted after the
2699 newline before it, so the following line must be redrawn. */
2700 if (stop_vpos
== ep
.vpos
2701 && (ep
.bufpos
== BEGV
2702 || FETCH_BYTE (ep
.bytepos
- 1) != '\n'
2703 || ep
.bufpos
== Z
- end_unchanged
))
2704 stop_vpos
= ep
.vpos
+ 1;
2707 overlay_arrow_seen
= 0;
2708 zv_strings_seen
= 0;
2710 /* If changes do not reach to bottom of window,
2711 figure out how much to scroll the rest of the window */
2712 if (stop_vpos
< height
)
2714 /* Now determine how far up or down the rest of the window has moved */
2715 xp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2716 Z
- XFASTINT (w
->window_end_pos
),
2717 /* Don't care for VPOS... */
2718 1 << (BITS_PER_SHORT
- 1),
2720 1 << (BITS_PER_SHORT
- 1),
2721 width
, hscroll
, ep
.tab_offset
, w
);
2722 scroll_amount
= xp
.vpos
- XFASTINT (w
->window_end_vpos
);
2724 /* Is everything on frame below the changes whitespace?
2725 If so, no scrolling is really necessary. */
2726 for (i
= ep
.bytepos
; i
< xp
.bytepos
; i
++)
2728 tem
= FETCH_BYTE (i
);
2729 if (tem
!= ' ' && tem
!= '\n' && tem
!= '\t')
2732 if (i
== xp
.bytepos
)
2735 XSETFASTINT (w
->window_end_vpos
,
2736 XFASTINT (w
->window_end_vpos
) + scroll_amount
);
2738 /* Before doing any scrolling, verify that point will be on frame. */
2739 if (PT
> ep
.bufpos
&& !(PT
<= xp
.bufpos
&& xp
.vpos
< height
))
2741 if (PT
<= xp
.bufpos
)
2743 pp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2744 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2746 /* We have tab offset in EP, use it. */
2751 pp
= *compute_motion (xp
.bufpos
, xp
.vpos
, xp
.hpos
, 1,
2752 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2754 /* We have tab offset in XP, use it. */
2757 if (pp
.bufpos
< PT
|| pp
.vpos
== height
)
2759 cursor_vpos
= pp
.vpos
+ top
;
2760 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, pp
.hpos
, width
);
2763 if (stop_vpos
- scroll_amount
>= height
2764 || ep
.bufpos
== xp
.bufpos
)
2766 if (scroll_amount
< 0)
2767 stop_vpos
-= scroll_amount
;
2769 /* In this path, we have altered window_end_vpos
2770 and not left it negative.
2771 We must make sure that, in case display is preempted
2772 before the frame changes to reflect what we do here,
2773 further updates will not come to try_window_id
2774 and assume the frame and window_end_vpos match. */
2775 blank_end_of_window
= 1;
2777 else if (!scroll_amount
)
2779 /* Even if we don't need to scroll, we must adjust the
2780 charstarts of subsequent lines (that we won't redisplay)
2781 according to the amount of text inserted or deleted. */
2782 int oldpos
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2783 int adjust
= ep
.bufpos
- oldpos
;
2784 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1, adjust
);
2786 else if (bp
.bufpos
== Z
- end_unchanged
)
2788 /* If reprinting everything is nearly as fast as scrolling,
2789 don't bother scrolling. Can happen if lines are short. */
2790 if (scroll_cost (f
, bp
.vpos
+ top
- scroll_amount
,
2791 top
+ height
- max (0, scroll_amount
),
2793 > xp
.bufpos
- bp
.bufpos
- 20)
2794 /* Return "try normal display with same window-start."
2795 Too bad we can't prevent further scroll-thinking. */
2797 /* If pure deletion, scroll up as many lines as possible.
2798 In common case of killing a line, this can save the
2799 following line from being overwritten by scrolling
2800 and therefore having to be redrawn. */
2801 tem
= scroll_frame_lines (f
, bp
.vpos
+ top
- scroll_amount
,
2802 top
+ height
- max (0, scroll_amount
),
2803 scroll_amount
, bp
.bufpos
);
2808 /* scroll_frame_lines did not properly adjust subsequent
2809 lines' charstarts in the case where the text of the
2810 screen line at bp.vpos has changed.
2811 (This can happen in a deletion that ends in mid-line.)
2812 To adjust properly, we need to make things consistent
2814 So do a second adjust to make that happen.
2815 Note that stop_vpos >= ep.vpos, so it is sufficient
2816 to update the charstarts for lines at ep.vpos and below. */
2818 = FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2819 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1,
2820 ep
.bufpos
- oldstart
);
2823 else if (scroll_amount
)
2825 /* If reprinting everything is nearly as fast as scrolling,
2826 don't bother scrolling. Can happen if lines are short. */
2827 /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an
2828 overestimate of cost of reprinting, since xp.bufpos
2829 would end up below the bottom of the window. */
2830 if (scroll_cost (f
, ep
.vpos
+ top
- scroll_amount
,
2831 top
+ height
- max (0, scroll_amount
),
2833 > xp
.bufpos
- ep
.bufpos
- 20)
2834 /* Return "try normal display with same window-start."
2835 Too bad we can't prevent further scroll-thinking. */
2837 tem
= scroll_frame_lines (f
, ep
.vpos
+ top
- scroll_amount
,
2838 top
+ height
- max (0, scroll_amount
),
2839 scroll_amount
, ep
.bufpos
);
2840 if (!tem
) stop_vpos
= height
;
2844 /* In any case, do not display past bottom of window */
2845 if (stop_vpos
>= height
)
2851 /* Handle case where pos is before w->start --
2852 can happen if part of line had been clipped and is not clipped now */
2853 if (vpos
== 0 && pos
< marker_position (w
->start
))
2854 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2856 val
.bytepos
= pos_byte
;
2858 /* Redisplay the lines where the text was changed */
2859 last_text_vpos
= vpos
;
2860 /* The following code is omitted because we maintain tab offset in
2863 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2864 /* If we are starting display in mid-character, correct tab_offset
2865 to account for passing the line that that character really starts in. */
2866 if (val
.hpos
< lmargin
)
2867 tab_offset
+= width
;
2870 while (vpos
< stop_vpos
)
2872 val
= *display_text_line (w
, pos
, val
.bytepos
, top
+ vpos
++,
2873 val
.hpos
, val
.tab_offset
,
2874 val
.ovstring_chars_done
);
2875 /* If display_text_line ran a hook and changed some text,
2876 redisplay all the way to bottom of buffer
2877 So that we show the changes. */
2878 if (old_tick
!= MODIFF
)
2880 /* The following code is omitted because we maintain tab offset
2881 in val.tab_offset. */
2883 tab_offset
+= width
;
2884 if (val
.vpos
) tab_offset
= 0;
2886 if (pos
!= val
.bufpos
)
2888 /* Next line, unless prev line ended in end of buffer with no cr */
2889 = vpos
- (val
.vpos
&& FETCH_BYTE (val
.bytepos
- 1) != '\n');
2893 /* There are two cases:
2894 1) we have displayed down to the bottom of the window
2895 2) we have scrolled lines below stop_vpos by scroll_amount */
2899 /* If last line is continued in middle of character,
2900 include the split character in the text considered on the frame */
2901 if (val
.hpos
< lmargin
)
2903 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
);
2904 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2907 /* If scrolling made blank lines at window bottom,
2908 redisplay to fill those lines */
2909 if (scroll_amount
< 0)
2911 /* Don't consider these lines for general-purpose scrolling.
2912 That will save time in the scrolling computation. */
2913 FRAME_SCROLL_BOTTOM_VPOS (f
) = xp
.vpos
;
2916 pos_byte
= xp
.bytepos
;
2918 val
.tab_offset
= xp
.tab_offset
;
2920 { /* Display from next line */
2921 vpos
= height
+ scroll_amount
;
2925 else if (xp
.contin
&& xp
.hpos
!= lmargin
)
2927 val
.hpos
= xp
.prevhpos
- width
+ lmargin
;
2928 val
.tab_offset
= xp
.tab_offset
+ bp
.prevhpos
- width
;
2929 DEC_BOTH (pos
, pos_byte
);
2932 blank_end_of_window
= 1;
2933 /* The following code is omitted because we maintain tab offset
2934 in val.tab_offset. */
2936 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2937 /* If we are starting display in mid-character, correct tab_offset
2938 to account for passing the line that that character starts in. */
2939 if (val
.hpos
< lmargin
)
2940 tab_offset
+= width
;
2942 val
.bytepos
= pos_byte
;
2943 while (vpos
< height
)
2945 val
= *display_text_line (w
, pos
, val
.bytepos
,
2946 top
+ vpos
++, val
.hpos
,
2947 val
.tab_offset
, val
.ovstring_chars_done
);
2948 /* The following code is omitted because we maintain tab
2949 offset in val.tab_offset. */
2951 tab_offset
+= width
;
2952 if (val
.vpos
) tab_offset
= 0;
2957 /* Here is a case where display_text_line sets cursor_vpos wrong.
2958 Make it be fixed up, below. */
2964 /* If bottom just moved off end of frame, change mode line percentage. */
2965 if (XFASTINT (w
->window_end_pos
) == 0
2967 w
->update_mode_line
= Qt
;
2969 /* Attempt to adjust end-of-text positions to new bottom line */
2972 delta
= height
- xp
.vpos
;
2974 || (delta
> 0 && xp
.bufpos
<= ZV
)
2975 || (delta
== 0 && xp
.hpos
))
2977 val
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), delta
, w
);
2978 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2979 XSETFASTINT (w
->window_end_vpos
,
2980 XFASTINT (w
->window_end_vpos
) + val
.vpos
);
2984 w
->window_end_valid
= Qnil
;
2986 /* If point was not in a line that was displayed, find it */
2987 if (cursor_vpos
< 0)
2990 val
= *compute_motion (start
, 0, lmargin
, 0, PT
,
2991 /* Don't care for VPOS... */
2992 1 << (BITS_PER_SHORT
- 1),
2994 1 << (BITS_PER_SHORT
- 1),
2996 pos_tab_offset (w
, start
, start_byte
),
2998 /* Admit failure if point is off frame now */
2999 if (val
.vpos
>= height
)
3001 for (vpos
= 0; vpos
< height
; vpos
++)
3002 cancel_line (vpos
+ top
, f
);
3005 cursor_vpos
= val
.vpos
+ top
;
3006 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, val
.hpos
, width
);
3009 FRAME_CURSOR_X (f
) = cursor_hpos
;
3010 FRAME_CURSOR_Y (f
) = cursor_vpos
;
3014 val
= *compute_motion (start
, 0, lmargin
, 0, ZV
,
3015 height
, - (1 << (BITS_PER_SHORT
- 1)),
3017 pos_tab_offset (w
, start
, start_byte
),
3019 if (val
.vpos
!= XFASTINT (w
->window_end_vpos
))
3021 if (XFASTINT (w
->window_end_pos
)
3029 /* Copy LEN glyphs starting address FROM to the rope TO.
3030 But don't actually copy the parts that would come in before S.
3031 Value is TO, advanced past the copied data.
3032 F is the frame we are displaying in. */
3035 copy_part_of_rope (f
, to
, s
, from
, len
, face
)
3037 register GLYPH
*to
; /* Copy to here. */
3038 register GLYPH
*s
; /* Starting point. */
3039 Lisp_Object
*from
; /* Data to copy. */
3041 int face
; /* Face to apply to glyphs which don't specify one. */
3044 register Lisp_Object
*fp
= from
;
3045 /* These cache the results of the last call to compute_glyph_face. */
3047 int last_merged
= 0;
3050 if (! FRAME_TERMCAP_P (f
))
3053 GLYPH glyph
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3055 unsigned int c
= FAST_GLYPH_CHAR (glyph
);
3058 /* For an invalid character code, use space. */
3061 if (FAST_GLYPH_FACE (glyph
) == 0)
3062 /* If GLYPH has no face code, use FACE. */
3064 else if (FAST_GLYPH_FACE (glyph
) == last_code
)
3065 /* If it's same as previous glyph, use same result. */
3066 facecode
= last_merged
;
3069 /* Merge this glyph's face and remember the result. */
3070 last_code
= FAST_GLYPH_FACE (glyph
);
3071 last_merged
= facecode
= compute_glyph_face (f
, last_code
, face
);
3075 *to
= FAST_MAKE_GLYPH (c
, facecode
);
3083 if (to
>= s
) *to
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3090 /* Correct a glyph by replacing its specified user-level face code
3091 with a displayable computed face code. */
3094 fix_glyph (f
, glyph
, cface
)
3100 if (! FRAME_TERMCAP_P (f
))
3102 if (FAST_GLYPH_FACE (glyph
) != 0)
3103 cface
= compute_glyph_face (f
, FAST_GLYPH_FACE (glyph
), cface
);
3104 glyph
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), cface
);
3110 /* Return the column of position POS / POS_BYTE in window W's buffer.
3111 When used on the character at the beginning of a line,
3112 starting at column 0, this says how much to subtract from
3113 the column position of any character in the line
3114 to get its horizontal position on the screen. */
3117 pos_tab_offset (w
, pos
, pos_byte
)
3119 register int pos
, pos_byte
;
3122 int opoint_byte
= PT_BYTE
;
3124 int width
= window_internal_width (w
) - 1;
3127 return MINI_WINDOW_P (w
) ? -minibuf_prompt_width
: 0;
3129 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3132 TEMP_SET_PT_BOTH (pos
, pos_byte
);
3133 col
= current_column ();
3134 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
3139 /* Display one line of window W, starting at char position START in W's buffer.
3140 START_BYTE is the corresponding byte position.
3142 Display starting at horizontal position HPOS, expressed relative to
3143 W's left edge. In situations where the text at START shouldn't
3144 start at the left margin (i.e. when the window is hscrolled, or
3145 we're continuing a line which left off in the midst of a
3146 multi-column character), HPOS should be negative; we throw away
3147 characters up 'til hpos = 0. So, HPOS must take hscrolling into
3150 TABOFFSET is an offset for ostensible hpos, used in tab stop calculations.
3152 OVSTR_DONE is the number of chars of overlay before/after strings
3153 at this position which have already been processed.
3155 Display on position VPOS on the frame. It is origin 0, relative to
3156 the top of the frame, not W.
3158 Returns a STRUCT POSITION giving character to start next line with
3159 and where to display it, including a zero or negative hpos.
3160 The vpos field is not really a vpos; it is 1 unless the line is continued */
3162 struct position val_display_text_line
;
3164 static struct position
*
3165 display_text_line (w
, start
, start_byte
, vpos
, hpos
, taboffset
, ovstr_done
)
3173 register int pos
= start
;
3174 int pos_byte
= start_byte
;
3177 int pause
, limit_byte
;
3178 register unsigned char *p
;
3180 register GLYPH
*leftmargin
;
3181 register GLYPH
*p1prev
;
3182 register GLYPH
*p1start
;
3183 GLYPH
*p1_wide_column_end
= (GLYPH
*) 0;
3184 int prevpos
, prevpos_byte
;
3186 FRAME_PTR f
= XFRAME (w
->frame
);
3187 int tab_width
= XINT (current_buffer
->tab_width
);
3188 int ctl_arrow
= !NILP (current_buffer
->ctl_arrow
);
3189 int width
= window_internal_width (w
) - 1;
3190 struct position val
;
3191 int lastpos
, lastpos_byte
;
3193 int last_invis_skip
= 0;
3194 Lisp_Object last_invis_prop
;
3195 int hscroll
= XINT (w
->hscroll
);
3196 int truncate
= (hscroll
3197 || (truncate_partial_width_windows
3198 && !WINDOW_FULL_WIDTH_P (w
))
3199 || !NILP (current_buffer
->truncate_lines
));
3201 /* 1 if this buffer has a region to highlight. */
3202 int highlight_region
3203 = (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
)
3204 && XMARKER (current_buffer
->mark
)->buffer
!= 0);
3205 int region_beg
, region_end
;
3207 int selective
= (INTEGERP (current_buffer
->selective_display
)
3208 ? XINT (current_buffer
->selective_display
)
3209 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
3210 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
3211 register struct Lisp_Char_Table
*dp
= window_display_table (w
);
3213 Lisp_Object default_invis_vector
[3];
3214 /* Number of characters of ellipsis to display after an invisible line
3215 if it calls for an ellipsis.
3216 Note that this value can be nonzero regardless of whether
3217 selective display is enabled--you must check that separately. */
3219 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3220 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->size
3221 : !NILP (current_buffer
->selective_display_ellipses
) ? 3 : 0);
3222 /* This is the sequence of Lisp objects to display
3223 when there are invisible lines. */
3224 Lisp_Object
*invis_vector_contents
3225 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3226 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->contents
3227 : default_invis_vector
);
3229 GLYPH truncator
= (dp
== 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp
))
3230 || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp
)))
3231 ? '$' : XINT (DISP_TRUNC_GLYPH (dp
)));
3232 GLYPH continuer
= (dp
== 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp
))
3233 || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp
)))
3234 ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp
)));
3236 /* If 1, we must handle multibyte characters. */
3237 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
3238 /* Length of multibyte form of each character. */
3240 /* Glyphs generated should be set this bit mask if text must be
3241 displayed from right to left. */
3242 GLYPH rev_dir_bit
= (NILP (current_buffer
->direction_reversed
)
3243 ? 0 : GLYPH_MASK_REV_DIR
);
3245 /* The next buffer location at which the face should change, due
3246 to overlays or text property changes. */
3247 int next_face_change
;
3249 /* The next location where the `invisible' property changes, or an
3250 overlay starts or ends. */
3253 /* The face we're currently using. */
3254 int current_face
= 0;
3257 XSETFASTINT (default_invis_vector
[2], '.');
3258 default_invis_vector
[0] = default_invis_vector
[1] = default_invis_vector
[2];
3260 get_display_line (f
, vpos
, WINDOW_LEFT_MARGIN (w
));
3261 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
3263 /* Show where to highlight the region. */
3264 if (highlight_region
3265 /* Maybe highlight only in selected window. */
3266 && (highlight_nonselected_windows
3267 || w
== XWINDOW (selected_window
)
3268 || (MINI_WINDOW_P (XWINDOW (selected_window
))
3269 && w
== XWINDOW (Vminibuf_scroll_window
))))
3271 region_beg
= marker_position (current_buffer
->mark
);
3272 if (PT
< region_beg
)
3274 region_end
= region_beg
;
3279 w
->region_showing
= Qt
;
3283 region_beg
= region_end
= -1;
3284 w
->region_showing
= Qnil
;
3287 if (MINI_WINDOW_P (w
)
3289 && vpos
== XFASTINT (w
->top
))
3291 if (! NILP (minibuf_prompt
))
3293 int old_width
= minibuf_prompt_width
;
3295 minibuf_prompt_width
3296 = (display_string (w
, vpos
, XSTRING (minibuf_prompt
)->data
,
3297 STRING_BYTES (XSTRING (minibuf_prompt
)),
3298 hpos
+ WINDOW_LEFT_MARGIN (w
),
3299 /* Display a space if we truncate. */
3302 /* Truncate the prompt a little before the
3303 margin, so user input can at least start
3304 on the first line. */
3305 (XFASTINT (w
->width
) > 10
3306 ? XFASTINT (w
->width
) - 4 : -1),
3307 STRING_MULTIBYTE (minibuf_prompt
))
3308 - hpos
- WINDOW_LEFT_MARGIN (w
));
3309 hpos
+= minibuf_prompt_width
;
3310 taboffset
-= minibuf_prompt_width
- old_width
;
3313 minibuf_prompt_width
= 0;
3316 /* If we're hscrolled at all, use compute_motion to skip over any
3317 text off the left edge of the window. compute_motion may know
3318 tricks to do this faster than we can. */
3321 struct position
*left_edge
3322 = compute_motion (pos
, vpos
, hpos
, 0,
3324 width
, hscroll
, taboffset
, w
);
3326 /* Retrieve the buffer position and column provided by
3327 compute_motion. We can't assume that the column will be
3328 zero, because you may have multi-column characters crossing
3331 compute_motion may have moved us past the screen position we
3332 requested, if we hit a multi-column character, or the end of
3333 the line. If so, back up. */
3334 if (left_edge
->vpos
> vpos
3335 || left_edge
->hpos
> 0)
3337 pos
= left_edge
->bufpos
;
3338 pos_byte
= left_edge
->bytepos
;
3339 DEC_BOTH (pos
, pos_byte
);
3340 hpos
= left_edge
->prevhpos
;
3344 pos
= left_edge
->bufpos
;
3345 pos_byte
= left_edge
->bytepos
;
3346 hpos
= left_edge
->hpos
;
3350 hpos
+= WINDOW_LEFT_MARGIN (w
);
3352 desired_glyphs
->bufp
[vpos
] = start
;
3353 p1
= desired_glyphs
->glyphs
[vpos
] + hpos
;
3355 charstart
= desired_glyphs
->charstarts
[vpos
] + hpos
;
3356 /* In case we don't ever write anything into it... */
3357 desired_glyphs
->charstarts
[vpos
][WINDOW_LEFT_MARGIN (w
)] = -1;
3358 leftmargin
= desired_glyphs
->glyphs
[vpos
] + WINDOW_LEFT_MARGIN (w
);
3359 endp
= leftmargin
+ width
;
3361 /* Arrange the overlays nicely for our purposes. Usually, we call
3362 display_text_line on only one line at a time, in which case this
3363 can't really hurt too much, or we call it on lines which appear
3364 one after another in the buffer, in which case all calls to
3365 recenter_overlay_lists but the first will be pretty cheap. */
3366 recenter_overlay_lists (current_buffer
, pos
);
3368 /* Loop generating characters.
3369 Stop at end of buffer, before newline,
3370 if reach or pass continuation column,
3371 or at face change. */
3373 limit_byte
= pos_byte
;
3374 next_face_change
= pos
;
3375 next_boundary
= pos
;
3378 prevpos_byte
= pos_byte
;
3380 /* If the window is hscrolled and point is in the invisible part of the
3381 current line beyond the left margin we can record the cursor location
3383 if (hscroll
&& start
<= PT
&& PT
< pos
&& cursor_vpos
< 0)
3386 cursor_hpos
= p1
- leftmargin
;
3395 while (pos
== next_boundary
)
3397 Lisp_Object position
, limit
, prop
, ww
;
3399 /* Display the overlay strings here, unless we're at ZV
3400 and have already displayed the appropriate strings
3401 on an earlier line. */
3402 if (pos
< ZV
|| !zv_strings_seen
++)
3405 unsigned char *ovstr
;
3406 ovlen
= overlay_strings (pos
, w
, &ovstr
);
3410 /* Skip the ones we did in a previous line. */
3411 ovstr
+= ovstr_done
;
3412 ovlen
-= ovstr_done
;
3421 c
= STRING_CHAR_AND_LENGTH (ovstr
, ovlen
, len
);
3422 ovstr
+= len
, ovlen
-= len
, ovstr_done
+= len
;
3423 charset
= CHAR_CHARSET (c
);
3424 cols
= (charset
== CHARSET_COMPOSITION
3425 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3426 : CHARSET_WIDTH (charset
));
3430 c
= *ovstr
++, ovlen
--, ovstr_done
++;
3433 g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3436 if (p1
>= leftmargin
&& p1
< endp
)
3437 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3441 /* If we did all the overlay strings
3442 and we have room for text, clear ovstr_done
3443 just for neatness' sake. */
3444 if (ovlen
== 0 && p1
< endp
)
3449 /* Did we reach point? Record the cursor location. */
3450 if (pos
== PT
&& cursor_vpos
< 0)
3453 cursor_hpos
= p1
- leftmargin
;
3459 XSETFASTINT (position
, pos
);
3460 limit
= Fnext_overlay_change (position
);
3461 #ifdef USE_TEXT_PROPERTIES
3462 /* This is just an estimate to give reasonable
3463 performance; nothing should go wrong if it is too small. */
3464 if (XFASTINT (limit
) > pos
+ 50)
3466 int limitpos
= pos
+ 50;
3467 XSETFASTINT (limit
, limitpos
);
3469 limit
= Fnext_single_property_change (position
, Qinvisible
,
3470 Fcurrent_buffer (), limit
);
3472 next_boundary
= XFASTINT (limit
);
3473 /* if the `invisible' property is set, we can skip to
3474 the next property change. */
3476 prop
= Fget_char_property (position
, Qinvisible
, ww
);
3477 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
3479 if (pos
< PT
&& next_boundary
>= PT
)
3482 cursor_hpos
= p1
- leftmargin
;
3484 pos
= next_boundary
;
3485 pos_byte
= CHAR_TO_BYTE (pos
);
3486 last_invis_skip
= pos
;
3487 last_invis_prop
= prop
;
3491 /* Did we reach point? Record the cursor location. */
3492 if (pos
== PT
&& cursor_vpos
< 0)
3495 cursor_hpos
= p1
- leftmargin
;
3498 /* Did we hit the end of the visible region of the buffer?
3502 /* Update charstarts for the end of this line. */
3503 /* Do nothing if off the left edge or at the right edge. */
3504 if (p1
>= leftmargin
&& p1
+ 1 != endp
)
3506 int *p2x
= &charstart
[(p1
< leftmargin
3514 /* Figure out where (if at all) the
3515 redisplay_end_trigger-hook should run. */
3516 if (MARKERP (w
->redisplay_end_trigger
)
3517 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
3518 e_t_h
= marker_position (w
->redisplay_end_trigger
);
3519 else if (INTEGERP (w
->redisplay_end_trigger
))
3520 e_t_h
= XINT (w
->redisplay_end_trigger
);
3524 /* If we've gone past the place to run a hook,
3526 if (pos
>= e_t_h
&& e_t_h
!= ZV
)
3528 Lisp_Object args
[3];
3530 args
[0] = Qredisplay_end_trigger_functions
;
3531 XSETWINDOW (args
[1], w
);
3532 XSETINT (args
[2], e_t_h
);
3534 /* Since we are *trying* to run these functions,
3535 don't try to run them again, even if they get an error. */
3536 w
->redisplay_end_trigger
= Qnil
;
3537 Frun_hook_with_args (3, args
);
3540 /* Notice if it changed the face of this character. */
3541 next_face_change
= pos
;
3545 /* Did we hit a face change? Figure out what face we should
3546 use now. We also hit this the first time through the
3547 loop, to see what face we should start with. */
3548 if (pos
>= next_face_change
3549 && (FRAME_WINDOW_P (f
) || FRAME_MSDOS_P (f
)))
3551 int limit
= pos
+ 50;
3553 current_face
= compute_char_face (f
, w
, pos
,
3554 region_beg
, region_end
,
3555 &next_face_change
, limit
, 0);
3559 /* Compute the next place we need to stop
3560 and do something special; set PAUSE. */
3564 if (pos
< next_boundary
&& next_boundary
< pause
)
3565 pause
= next_boundary
;
3566 if (pos
< next_face_change
&& next_face_change
< pause
)
3567 pause
= next_face_change
;
3572 /* Wouldn't you hate to read the next line to someone over
3574 if (pos
< PT
&& PT
< pause
)
3576 if (pos
< GPT
&& GPT
< pause
)
3579 /* LIMIT_BYTE is not the same place in the buffer as PAUSE.
3580 It is a limit on valid characters.
3581 We use it to bound STRING_CHAR_AND_LENGTH. */
3582 limit_byte
= ZV_BYTE
;
3583 if (pos
< GPT
&& GPT_BYTE
< limit_byte
)
3584 limit_byte
= GPT_BYTE
;
3587 int temp
= CHAR_TO_BYTE (pos
);
3588 p
= BYTE_POS_ADDR (temp
);
3596 p1_wide_column_end
= (GLYPH
*) 0;
3599 c
= STRING_CHAR_AND_LENGTH (p
, limit_byte
- pos_byte
, len
), p
+= len
;
3602 /* Let a display table override all standard display methods. */
3603 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
3605 p1
= copy_part_of_rope (f
, p1
, leftmargin
,
3606 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
3607 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
3608 current_face
, rev_dir_bit
);
3610 else if (c
>= 040 && c
< 0177)
3612 if (p1
>= leftmargin
)
3613 *p1
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3619 /* Same as p1prev, but after the invis_vector_contents text
3620 (if we have that on this line). */
3621 GLYPH
*p1prev_modified
;
3625 if (last_invis_skip
== pos
3626 && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop
))
3630 && indented_beyond_p (pos
+ 1, pos_byte
+ 1, selective
))
3632 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3635 INC_BOTH (pos
, pos_byte
);
3636 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3637 pos
= PT
, pos_byte
= PT_BYTE
;
3638 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3643 SET_PT_BOTH (opoint
, opoint_byte
);
3645 if (invis
&& selective_rlen
> 0 && p1
>= leftmargin
)
3650 cs
= charstart
+ (p1
- p1start
);
3653 p1
+= selective_rlen
;
3654 if (p1
- leftmargin
> width
)
3657 #if 0 /* This needs more work; charstarts needs to record
3658 both whether a position ho;ds an ellipsis character
3659 and what buffer position it corresponds to. */
3660 csend
= charstart
+ (p1
- p1start
);
3663 /* The idea is to use p1prev_modified instead of p1prev
3664 in the loop below over p2x. */
3665 p1prev_modified
= p1
;
3668 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3669 (p1
- p1prev
), current_face
, rev_dir_bit
);
3672 /* Update charstarts for the newline that ended this line. */
3673 /* Do nothing here for a char that's entirely off the left edge
3674 or if it starts at the right edge. */
3675 if (p1
>= leftmargin
&& p1prev
!= endp
)
3677 /* Store the newline's position into charstarts
3678 for the column where the newline starts.
3679 Store -1 for the rest of the glyphs it occupies. */
3680 int *p2x
= &charstart
[(p1prev
< leftmargin
3681 ? leftmargin
: p1prev
)
3683 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3690 /* Draw the face of the newline character as extending all the
3691 way to the end of the frame line. */
3694 if (p1
< leftmargin
)
3697 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3707 if (p1
>= leftmargin
&& p1
< endp
)
3708 *p1
= MAKE_GLYPH (f
, ' ', current_face
) | rev_dir_bit
;
3711 while ((p1
- leftmargin
+ taboffset
+ hscroll
- (hscroll
> 0))
3714 else if (c
== Ctl ('M') && selective
== -1)
3716 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3717 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3718 pos
= PT
, pos_byte
= PT_BYTE
;
3719 SET_PT_BOTH (opoint
, opoint_byte
);
3721 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3723 if (selective_rlen
> 0)
3725 p1
+= selective_rlen
;
3726 if (p1
- leftmargin
> width
)
3728 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3729 (p1
- p1prev
), current_face
, rev_dir_bit
);
3732 /* Draw the face of the newline character as extending all the
3733 way to the end of the frame line. */
3736 if (p1
< leftmargin
)
3739 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3743 /* Update charstarts for the ^M that ended this line. */
3744 /* Do nothing here for a char that's entirely off the left edge
3745 or if it starts at the right edge. */
3746 if (p1
>= leftmargin
&& p1prev
!= endp
)
3748 /* Store the newline's position into charstarts
3749 for the column where the newline starts.
3750 Store -1 for the rest of the glyphs it occupies. */
3751 int *p2x
= &charstart
[(p1prev
< leftmargin
3752 ? leftmargin
: p1prev
)
3754 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3762 else if (c
< 0200 && ctl_arrow
)
3764 if (p1
>= leftmargin
)
3766 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
3767 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
3768 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
3772 if (p1
>= leftmargin
&& p1
< endp
)
3773 *p1
= MAKE_GLYPH (f
, c
^ 0100, current_face
) | rev_dir_bit
;
3778 /* C is a multibyte character or a character to be displayed
3780 int remaining_bytes
= len
;
3784 /* C is a multibyte character. */
3785 int charset
= CHAR_CHARSET (c
);
3786 int columns
= (charset
== CHARSET_COMPOSITION
3787 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3788 : CHARSET_WIDTH (charset
));
3789 GLYPH g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3793 if (p1
>= leftmargin
&& p1
< endp
)
3794 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3797 p1_wide_column_end
= p1
;
3798 remaining_bytes
-= CHARSET_BYTES (charset
);
3801 while (remaining_bytes
> 0)
3803 c
= *(p
- remaining_bytes
--);
3805 if (p1
>= leftmargin
&& p1
< endp
)
3808 (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
3809 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
3810 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
3814 if (p1
>= leftmargin
&& p1
< endp
)
3815 *p1
= (MAKE_GLYPH (f
, (c
>> 6) + '0', current_face
)
3818 if (p1
>= leftmargin
&& p1
< endp
)
3819 *p1
= (MAKE_GLYPH (f
, (7 & (c
>> 3)) + '0', current_face
)
3822 if (p1
>= leftmargin
&& p1
< endp
)
3823 *p1
= (MAKE_GLYPH (f
, (7 & c
) + '0', current_face
)
3830 prevpos_byte
= pos_byte
;
3834 /* Update charstarts for the character just output. */
3836 /* Do nothing here for a char that's entirely off the left edge. */
3837 if (p1
>= leftmargin
)
3839 /* Store the char's position into charstarts
3840 for the first glyph occupied by this char.
3841 Store -1 for the rest of the glyphs it occupies. */
3844 int *p2x
= &charstart
[(p1prev
< leftmargin
3845 ? leftmargin
: p1prev
)
3847 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3857 val
.hpos
= - XINT (w
->hscroll
);
3864 lastpos_byte
= pos_byte
;
3866 /* Store 0 in this charstart line for the positions where
3867 there is no character. But do leave what was recorded
3868 for the character that ended the line. */
3869 /* Add 1 in the endtest to compensate for the fact that ENDP was
3870 made from WIDTH, which is 1 less than the window's actual
3872 i
= p1
- p1start
+ 1;
3873 if (p1
< leftmargin
)
3874 i
+= leftmargin
- p1
;
3875 for (; i
< endp
- p1start
+ 1; i
++)
3878 /* Handle continuation in middle of a character */
3879 /* by backing up over it */
3882 /* Don't back up if we never actually displayed any text.
3883 This occurs when the minibuffer prompt takes up the whole line. */
3886 /* Start the next line with that same character whose
3887 character code is C and the length of multi-byte form is
3890 pos_byte
= prevpos_byte
;
3892 if (p1_wide_column_end
< endp
)
3893 /* As ENDP is not in the middle of wide-column character,
3894 we can break the line at ENDP and start from the middle
3895 column in the next line. So, adjust VAL.HPOS to skip
3896 the columns output on this line. */
3897 val
.hpos
+= p1prev
- endp
;
3900 /* We displayed a wide-column character at around ENDP.
3901 Since we can't broke it in the middle, the whole
3902 character should be driven into the next line. */
3903 /* As the result, the actual columns occupied by the
3904 text on this line is less than WIDTH. VAL.TAB_OFFSET
3905 must be adjusted. */
3906 taboffset
= taboffset
+ (p1prev
- endp
);
3907 /* Let's fill unused columns with TRUNCATOR or CONTINUER. */
3909 GLYPH g
= fix_glyph (f
, truncate
? truncator
: continuer
, 0);
3910 while (p1prev
< endp
)
3913 /* If POINT is at POS, cursor should not on this line. */
3915 lastpos_byte
= pos_byte
;
3921 /* Keep in this line everything up to the continuation column. */
3925 /* Finish deciding which character to start the next line on,
3926 and what hpos to start it at.
3927 Also set `lastpos' to the last position which counts as "on this line"
3928 for cursor-positioning. */
3932 if (FETCH_BYTE (pos_byte
) == '\n')
3934 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3936 /* If stopped due to a newline, start next line after it */
3937 SET_PT_BOTH (pos
+ 1, pos_byte
+ 1);
3940 /* Check again for hidden lines, in case the newline occurred exactly
3941 at the right margin. */
3942 while (PT
< ZV
&& selective
> 0
3943 && indented_beyond_p (PT
, PT_BYTE
, selective
))
3944 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3946 pos
= PT
, pos_byte
= PT_BYTE
;
3947 SET_PT_BOTH (opoint
, opoint_byte
);
3950 /* Stopped due to right margin of window */
3954 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3956 SET_PT_BOTH (pos
, pos_byte
);
3957 *p1
++ = fix_glyph (f
, truncator
, 0);
3958 /* Truncating => start next line after next newline,
3959 and point is on this line if it is before the newline,
3960 and skip none of first char of next line */
3962 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3963 while (PT
< ZV
&& selective
> 0
3964 && indented_beyond_p (PT
, PT_BYTE
, selective
));
3965 pos
= PT
, pos_byte
= PT_BYTE
;
3966 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
3967 SET_PT_BOTH (opoint
, opoint_byte
);
3969 lastpos
= pos
- (FETCH_BYTE (pos_byte
- 1) == '\n');
3970 lastpos_byte
= CHAR_TO_BYTE (lastpos
);
3975 *p1
++ = fix_glyph (f
, continuer
, 0);
3977 DEC_BOTH (lastpos
, lastpos_byte
);
3978 val
.tab_offset
= taboffset
+ width
;
3985 /* If point is at eol or in invisible text at eol,
3986 record its frame location now. */
3988 if (start
<= PT
&& PT
<= lastpos
&& cursor_vpos
< 0)
3991 cursor_hpos
= p1
- leftmargin
;
3994 if (cursor_vpos
== vpos
)
3996 if (cursor_hpos
< 0) cursor_hpos
= 0;
3997 if (cursor_hpos
> width
) cursor_hpos
= width
;
3998 cursor_hpos
+= WINDOW_LEFT_MARGIN (w
);
3999 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
4001 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (f
)
4002 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
)))
4004 FRAME_CURSOR_Y (f
) = cursor_vpos
;
4005 FRAME_CURSOR_X (f
) = cursor_hpos
;
4008 if (w
== XWINDOW (selected_window
))
4010 /* Line is not continued and did not start
4011 in middle of character */
4012 if ((hpos
- WINDOW_LEFT_MARGIN (w
)
4013 == (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
4016 this_line_bufpos
= start
;
4017 this_line_buffer
= current_buffer
;
4018 this_line_vpos
= cursor_vpos
;
4019 this_line_start_hpos
= hpos
- WINDOW_LEFT_MARGIN (w
);
4020 this_line_endpos
= Z
- lastpos
;
4023 this_line_bufpos
= 0;
4028 /* If hscroll and line not empty, insert truncation-at-left marker */
4029 if (hscroll
&& lastpos
!= start
)
4031 GLYPH g
= fix_glyph (f
, truncator
, 0);
4033 if (p1
<= leftmargin
)
4034 p1
= leftmargin
+ 1;
4035 else /* MULE: it may be a wide-column character */
4037 p1prev
= leftmargin
+ 1;
4038 while (p1prev
< p1
&& *p1prev
& GLYPH_MASK_PADDING
)
4043 if (!WINDOW_RIGHTMOST_P (w
))
4046 if (p1
< leftmargin
) p1
= leftmargin
;
4047 while (p1
< endp
) *p1
++ = SPACEGLYPH
;
4049 /* Don't draw vertical bars if we're using scroll bars. They're
4050 covered up by the scroll bars, and it's distracting to see
4051 them when the scroll bar windows are flickering around to be
4053 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
4056 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
4059 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
4060 *p1
++ = (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
4061 ? XINT (DISP_BORDER_GLYPH (dp
))
4064 desired_glyphs
->used
[vpos
] = max (desired_glyphs
->used
[vpos
],
4065 p1
- desired_glyphs
->glyphs
[vpos
]);
4066 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
4068 /* If the start of this line is the overlay arrow-position,
4069 then put the arrow string into the display-line. */
4071 if (MARKERP (Voverlay_arrow_position
)
4072 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
4073 && start
== marker_position (Voverlay_arrow_position
)
4074 && STRINGP (Voverlay_arrow_string
)
4075 && ! overlay_arrow_seen
)
4078 int len
= XSTRING (Voverlay_arrow_string
)->size
;
4084 /* If the arrow string has text props, obey them when displaying. */
4085 for (i
= 0, i_byte
= 0; i
< len
; )
4088 Lisp_Object face
, ilisp
;
4092 if (STRING_MULTIBYTE (Voverlay_arrow_string
))
4093 FETCH_STRING_CHAR_ADVANCE (c
, Voverlay_arrow_string
, i
, i_byte
);
4095 c
= XSTRING (Voverlay_arrow_string
)->data
[i
++];
4097 XSETFASTINT (ilisp
, i
);
4099 if (FRAME_WINDOW_P (f
))
4101 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
4102 newface
= compute_glyph_face_1 (f
, face
, 0);
4103 c
= FAST_MAKE_GLYPH (c
, newface
);
4105 #endif /* HAVE_FACES */
4106 leftmargin
[idx
] = c
;
4109 /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */
4110 arrow_end
= (leftmargin
- desired_glyphs
->glyphs
[vpos
]) + len
;
4111 if (desired_glyphs
->used
[vpos
] < arrow_end
)
4112 desired_glyphs
->used
[vpos
] = arrow_end
;
4114 overlay_arrow_seen
= 1;
4118 val
.bytepos
= pos_byte
;
4119 val
.ovstring_chars_done
= ovstr_done
;
4120 val_display_text_line
= val
;
4121 return &val_display_text_line
;
4124 /* Redisplay the menu bar in the frame for window W. */
4127 display_menu_bar (w
)
4130 Lisp_Object items
, tail
;
4131 register int vpos
= 0;
4132 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4133 int maxendcol
= FRAME_WIDTH (f
);
4138 if (!NILP (Vwindow_system
))
4142 #ifdef USE_X_TOOLKIT
4145 #endif /* USE_X_TOOLKIT */
4147 get_display_line (f
, vpos
, 0);
4149 items
= FRAME_MENU_BAR_ITEMS (f
);
4150 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
4152 Lisp_Object pos
, string
;
4153 string
= XVECTOR (items
)->contents
[i
+ 1];
4157 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], hpos
);
4159 if (hpos
< maxendcol
)
4160 hpos
= display_string (w
, vpos
,
4161 XSTRING (string
)->data
,
4162 STRING_BYTES (XSTRING (string
)),
4163 hpos
, 0, 0, hpos
, maxendcol
,
4164 STRING_MULTIBYTE (string
));
4165 /* Put a space between items. */
4166 if (hpos
< maxendcol
)
4168 int hpos1
= hpos
+ 1;
4169 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0,
4170 min (hpos1
, maxendcol
), maxendcol
, 0);
4174 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4175 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4177 /* Fill out the line with spaces. */
4178 if (maxendcol
> hpos
)
4179 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0, maxendcol
, maxendcol
, 0);
4181 /* Clear the rest of the lines allocated to the menu bar. */
4183 while (vpos
< FRAME_MENU_BAR_LINES (f
))
4184 get_display_line (f
, vpos
++, 0);
4187 /* Display the mode line for window w */
4190 display_mode_line (w
)
4193 register int vpos
= XFASTINT (w
->height
) + XFASTINT (w
->top
) - 1;
4194 register int left
= WINDOW_LEFT_MARGIN (w
);
4195 register int right
= WINDOW_RIGHT_MARGIN (w
);
4196 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4198 line_number_displayed
= 0;
4199 w
->column_number_displayed
= Qnil
;
4201 get_display_line (f
, vpos
, left
);
4203 /* Temporarily make frame F's kboard the current kboard
4204 so that kboard-local variables in the mode_line_format
4205 will get the right values. */
4206 push_frame_kboard (f
);
4208 display_mode_element (w
, vpos
, left
, 0, right
, right
,
4209 current_buffer
->mode_line_format
);
4211 pop_frame_kboard ();
4213 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4215 /* Put the mode line in inverse video.
4216 Use faces if possible, since that lets us handle
4217 partial-width windows and avoid inverting the scroll bar columns. */
4219 if (! FRAME_TERMCAP_P (f
) && mode_line_inverse_video
)
4221 /* For a partial width window, explicitly set face of each glyph. */
4223 unsigned int padding
;
4224 GLYPH
*ptr
= FRAME_DESIRED_GLYPHS (f
)->glyphs
[vpos
];
4225 for (i
= left
; i
< right
; ++i
)
4227 padding
= ptr
[i
] & GLYPH_MASK_PADDING
;
4228 ptr
[i
] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr
[i
]), 1) | padding
;
4234 /* Make the mode line inverse video if the entire line
4235 is made of mode lines.
4236 I.e. if this window is full width,
4237 or if it is the child of a full width window
4238 (which implies that that window is split side-by-side
4239 and the rest of this line is mode lines of the sibling windows). */
4240 if (WINDOW_FULL_WIDTH_P (w
)
4241 || WINDOW_FULL_WIDTH_P (XWINDOW (w
->parent
)))
4242 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4245 /* Contribute ELT to the mode line for window W.
4246 How it translates into text depends on its data type.
4248 VPOS is the position of the mode line being displayed.
4250 HPOS is the position (absolute on frame) where this element's text
4251 should start. The output is truncated automatically at the right
4254 DEPTH is the depth in recursion. It is used to prevent
4255 infinite recursion here.
4257 MINENDCOL is the hpos before which the element may not end.
4258 The element is padded at the right with spaces if nec
4259 to reach this column.
4261 MAXENDCOL is the hpos past which this element may not extend.
4262 If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority.
4263 (This is necessary to make nested padding and truncation work.)
4265 Returns the hpos of the end of the text generated by ELT.
4266 The next element will receive that value as its HPOS arg,
4267 so as to concatenate the elements. */
4270 display_mode_element (w
, vpos
, hpos
, depth
, minendcol
, maxendcol
, elt
)
4272 register int vpos
, hpos
;
4275 register int maxendcol
;
4276 register Lisp_Object elt
;
4284 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
4288 /* A string: output it and check for %-constructs within it. */
4289 register unsigned char c
;
4290 register unsigned char *this = XSTRING (elt
)->data
;
4292 while (hpos
< maxendcol
&& *this)
4294 unsigned char *last
= this;
4295 while ((c
= *this++) != '\0' && c
!= '%')
4297 if (this - 1 != last
)
4299 register int lim
= --this - last
+ hpos
;
4300 if (frame_title_ptr
)
4301 hpos
= store_frame_title (last
, hpos
, min (lim
, maxendcol
));
4303 hpos
= display_string (w
, vpos
, last
, -1, hpos
, 0, 1,
4304 hpos
, min (lim
, maxendcol
),
4305 STRING_MULTIBYTE (elt
));
4309 register int minendcol
;
4310 register int spec_width
= 0;
4312 /* We can't allow -ve args due to the "%-" construct */
4313 /* Argument specifies minwidth but not maxwidth
4314 (maxwidth can be specified by
4315 (<negative-number> . <stuff>) mode-line elements) */
4317 while ((c
= *this++) >= '0' && c
<= '9')
4319 spec_width
= spec_width
* 10 + (c
- '0');
4322 minendcol
= hpos
+ spec_width
;
4323 if (minendcol
> maxendcol
)
4325 spec_width
= maxendcol
- hpos
;
4326 minendcol
= maxendcol
;
4330 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4331 spec_width
, maxendcol
,
4332 Vglobal_mode_string
);
4335 char *spec
= decode_mode_spec (w
, c
, spec_width
,
4337 if (frame_title_ptr
)
4338 hpos
= store_frame_title (spec
, minendcol
, maxendcol
);
4340 hpos
= display_string (w
, vpos
, spec
, -1,
4342 minendcol
, maxendcol
, -1);
4350 /* A symbol: process the value of the symbol recursively
4351 as if it appeared here directly. Avoid error if symbol void.
4352 Special case: if value of symbol is a string, output the string
4355 register Lisp_Object tem
;
4356 tem
= Fboundp (elt
);
4359 tem
= Fsymbol_value (elt
);
4360 /* If value is a string, output that string literally:
4361 don't check for % within it. */
4364 if (frame_title_ptr
)
4365 hpos
= store_frame_title (XSTRING (tem
)->data
,
4366 minendcol
, maxendcol
);
4368 hpos
= display_string (w
, vpos
, XSTRING (tem
)->data
,
4369 STRING_BYTES (XSTRING (tem
)),
4370 hpos
, 0, 1, minendcol
, maxendcol
,
4371 STRING_MULTIBYTE (tem
));
4373 /* Give up right away for nil or t. */
4374 else if (!EQ (tem
, elt
))
4375 { elt
= tem
; goto tail_recurse
; }
4382 register Lisp_Object car
, tem
;
4384 /* A cons cell: three distinct cases.
4385 If first element is a string or a cons, process all the elements
4386 and effectively concatenate them.
4387 If first element is a negative number, truncate displaying cdr to
4388 at most that many characters. If positive, pad (with spaces)
4389 to at least that many characters.
4390 If first element is a symbol, process the cadr or caddr recursively
4391 according to whether the symbol's value is non-nil or nil. */
4392 car
= XCONS (elt
)->car
;
4395 tem
= Fboundp (car
);
4396 elt
= XCONS (elt
)->cdr
;
4399 /* elt is now the cdr, and we know it is a cons cell.
4400 Use its car if CAR has a non-nil value. */
4403 tem
= Fsymbol_value (car
);
4405 { elt
= XCONS (elt
)->car
; goto tail_recurse
; }
4407 /* Symbol's value is nil (or symbol is unbound)
4408 Get the cddr of the original list
4409 and if possible find the caddr and use that. */
4410 elt
= XCONS (elt
)->cdr
;
4413 else if (!CONSP (elt
))
4415 elt
= XCONS (elt
)->car
;
4418 else if (INTEGERP (car
))
4420 register int lim
= XINT (car
);
4421 elt
= XCONS (elt
)->cdr
;
4423 /* Negative int means reduce maximum width.
4424 DO NOT change MINENDCOL here!
4425 (20 -10 . foo) should truncate foo to 10 col
4426 and then pad to 20. */
4427 maxendcol
= min (maxendcol
, hpos
- lim
);
4430 /* Padding specified. Don't let it be more than
4433 if (lim
> maxendcol
)
4435 /* If that's more padding than already wanted, queue it.
4436 But don't reduce padding already specified even if
4437 that is beyond the current truncation point. */
4438 if (lim
> minendcol
)
4443 else if (STRINGP (car
) || CONSP (car
))
4445 register int limit
= 50;
4446 /* LIMIT is to protect against circular lists. */
4447 while (CONSP (elt
) && --limit
> 0
4448 && hpos
< maxendcol
)
4450 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4453 elt
= XCONS (elt
)->cdr
;
4461 if (frame_title_ptr
)
4462 hpos
= store_frame_title ("*invalid*", minendcol
, maxendcol
);
4464 hpos
= display_string (w
, vpos
, "*invalid*", -1, hpos
, 0, 1,
4465 minendcol
, maxendcol
, 0);
4469 if (minendcol
> hpos
)
4470 if (frame_title_ptr
)
4471 hpos
= store_frame_title ("", minendcol
, maxendcol
);
4473 hpos
= display_string (w
, vpos
, "", 0, hpos
,
4474 0, 1, minendcol
, maxendcol
, 0);
4478 /* Write a null-terminated, right justified decimal representation of
4479 the positive integer D to BUF using a minimal field width WIDTH. */
4482 pint2str (buf
, width
, d
)
4487 register char *p
= buf
;
4494 *p
++ = d
% 10 + '0';
4497 for (width
-= (int) (p
- buf
); width
> 0; --width
) *p
++ = ' ';
4507 /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF.
4508 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
4509 type of CODING_SYSTEM. Return updated pointer into BUF. */
4512 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
4513 Lisp_Object coding_system
;
4518 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
4520 val
= coding_system
;
4522 if (NILP (val
)) /* Not yet decided. */
4527 *buf
++ = eol_mnemonic_undecided
;
4528 /* Don't mention EOL conversion if it isn't decided. */
4532 Lisp_Object eolvalue
;
4534 eolvalue
= Fget (coding_system
, Qeol_type
);
4536 while (!NILP (val
) && SYMBOLP (val
))
4538 val
= Fget (val
, Qcoding_system
);
4539 if (NILP (eolvalue
))
4540 eolvalue
= Fget (val
, Qeol_type
);
4544 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
4548 /* The EOL conversion we are using. */
4550 /* The EOL conversion that is normal on this system. */
4552 if (NILP (eolvalue
)) /* Not yet decided. */
4553 eoltype
= eol_mnemonic_undecided
;
4554 else if (VECTORP (eolvalue
)) /* Not yet decided. */
4555 eoltype
= eol_mnemonic_undecided
;
4556 else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */
4557 eoltype
= (XFASTINT (eolvalue
) == 0
4559 : (XFASTINT (eolvalue
) == 1
4560 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
4562 /* Mention the EOL conversion if it is not the usual one. */
4569 /* Return a string for the output of a mode line %-spec for window W,
4570 generated by character C. SPEC_WIDTH is the field width when
4571 padding to the left (%c, %l). The value returned from this
4572 function will later be truncated to width MAXWIDTH. */
4574 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
4577 decode_mode_spec (w
, c
, spec_width
, maxwidth
)
4580 register int spec_width
;
4581 register int maxwidth
;
4584 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4585 char *decode_mode_spec_buf
= (char *) FRAME_TEMP_GLYPHS (f
)->total_contents
;
4586 struct buffer
*b
= XBUFFER (w
->buffer
);
4589 if (maxwidth
> FRAME_WIDTH (f
))
4590 maxwidth
= FRAME_WIDTH (f
);
4595 if (!NILP (b
->read_only
))
4597 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4602 /* This differs from %* only for a modified read-only buffer. */
4603 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4605 if (!NILP (b
->read_only
))
4610 /* This differs from %* in ignoring read-only-ness. */
4611 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4623 if (command_loop_level
> 5)
4625 p
= decode_mode_spec_buf
;
4626 for (i
= 0; i
< command_loop_level
; i
++)
4629 return decode_mode_spec_buf
;
4637 if (command_loop_level
> 5)
4639 p
= decode_mode_spec_buf
;
4640 for (i
= 0; i
< command_loop_level
; i
++)
4643 return decode_mode_spec_buf
;
4651 if (maxwidth
< sizeof (lots_of_dashes
))
4652 return lots_of_dashes
;
4655 for (p
= decode_mode_spec_buf
, i
= maxwidth
; i
> 0; i
--)
4659 return decode_mode_spec_buf
;
4665 if (maxwidth
>= 3 && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4667 bcopy (XSTRING (obj
)->data
, decode_mode_spec_buf
, maxwidth
- 1);
4668 decode_mode_spec_buf
[maxwidth
- 1] = '\\';
4669 decode_mode_spec_buf
[maxwidth
] = '\0';
4670 return decode_mode_spec_buf
;
4677 int col
= current_column ();
4678 XSETFASTINT (w
->column_number_displayed
, col
);
4679 pint2str (decode_mode_spec_buf
, spec_width
, col
);
4680 return decode_mode_spec_buf
;
4684 /* %F displays the frame name. */
4685 /* Systems that can only display a single frame at a time should
4686 NOT replace the frame name with the (constant) frame title,
4687 since then they won't be able to tell which frame is that. */
4688 if (FRAME_WINDOW_P (f
) && !NILP (f
->title
))
4689 return (char *) XSTRING (f
->title
)->data
;
4690 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
4691 return (char *) XSTRING (f
->name
)->data
;
4699 else if (STRINGP (obj
) && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4701 bcopy ("...", decode_mode_spec_buf
, 3);
4702 bcopy (XSTRING (obj
)->data
+ STRING_BYTES (XSTRING (obj
)) - maxwidth
+ 3,
4703 decode_mode_spec_buf
+ 3, maxwidth
- 3);
4704 return decode_mode_spec_buf
;
4711 int startpos
= XMARKER (w
->start
)->charpos
;
4712 int startpos_byte
= marker_byte_position (w
->start
);
4713 int line
, linepos
, linepos_byte
, topline
;
4716 int height
= XFASTINT (w
->height
);
4718 /* If we decided that this buffer isn't suitable for line numbers,
4719 don't forget that too fast. */
4720 if (EQ (w
->base_line_pos
, w
->buffer
))
4722 /* But do forget it, if the window shows a different buffer now. */
4723 else if (BUFFERP (w
->base_line_pos
))
4724 w
->base_line_pos
= Qnil
;
4726 /* If the buffer is very big, don't waste time. */
4727 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
4729 w
->base_line_pos
= Qnil
;
4730 w
->base_line_number
= Qnil
;
4734 if (!NILP (w
->base_line_number
)
4735 && !NILP (w
->base_line_pos
)
4736 && XFASTINT (w
->base_line_pos
) <= startpos
)
4738 line
= XFASTINT (w
->base_line_number
);
4739 linepos
= XFASTINT (w
->base_line_pos
);
4740 linepos_byte
= buf_charpos_to_bytepos (b
, linepos
);
4745 linepos
= BUF_BEGV (b
);
4746 linepos_byte
= BUF_BEGV_BYTE (b
);
4749 /* Count lines from base line to window start position. */
4750 nlines
= display_count_lines (linepos
, linepos_byte
,
4754 topline
= nlines
+ line
;
4756 /* Determine a new base line, if the old one is too close
4757 or too far away, or if we did not have one.
4758 "Too close" means it's plausible a scroll-down would
4760 if (startpos
== BUF_BEGV (b
))
4762 XSETFASTINT (w
->base_line_number
, topline
);
4763 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
4765 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
4766 || linepos
== BUF_BEGV (b
))
4768 int limit
= BUF_BEGV (b
);
4769 int limit_byte
= BUF_BEGV_BYTE (b
);
4771 int distance
= (height
* 2 + 30) * 200;
4773 if (startpos
- distance
> limit
)
4775 limit
= startpos
- distance
;
4776 limit_byte
= CHAR_TO_BYTE (limit
);
4779 nlines
= display_count_lines (startpos
, startpos_byte
,
4781 - (height
* 2 + 30),
4783 /* If we couldn't find the lines we wanted within
4785 give up on line numbers for this window. */
4786 if (position
== limit_byte
&& limit
== startpos
- distance
)
4788 w
->base_line_pos
= w
->buffer
;
4789 w
->base_line_number
= Qnil
;
4793 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
4794 XSETFASTINT (w
->base_line_pos
, BYTE_TO_CHAR (position
));
4797 /* Now count lines from the start pos to point. */
4798 nlines
= display_count_lines (startpos
, startpos_byte
,
4799 PT_BYTE
, PT
, &junk
);
4801 /* Record that we did display the line number. */
4802 line_number_displayed
= 1;
4804 /* Make the string to show. */
4805 pint2str (decode_mode_spec_buf
, spec_width
, topline
+ nlines
);
4806 return decode_mode_spec_buf
;
4809 char* p
= decode_mode_spec_buf
;
4810 for (spec_width
-= 2; spec_width
> 0; --spec_width
) *p
++ = ' ';
4812 return decode_mode_spec_buf
;
4822 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
4828 int pos
= marker_position (w
->start
);
4829 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4831 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
4833 if (pos
<= BUF_BEGV (b
))
4838 else if (pos
<= BUF_BEGV (b
))
4842 if (total
> 1000000)
4843 /* Do it differently for a large value, to avoid overflow. */
4844 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4846 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4847 /* We can't normally display a 3-digit number,
4848 so get us a 2-digit number that is close. */
4851 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4852 return decode_mode_spec_buf
;
4856 /* Display percentage of size above the bottom of the screen. */
4859 int toppos
= marker_position (w
->start
);
4860 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
4861 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4863 if (botpos
>= BUF_ZV (b
))
4865 if (toppos
<= BUF_BEGV (b
))
4872 if (total
> 1000000)
4873 /* Do it differently for a large value, to avoid overflow. */
4874 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4876 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4877 /* We can't normally display a 3-digit number,
4878 so get us a 2-digit number that is close. */
4881 if (toppos
<= BUF_BEGV (b
))
4882 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
4884 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4885 return decode_mode_spec_buf
;
4890 /* status of process */
4891 obj
= Fget_buffer_process (w
->buffer
);
4893 return "no process";
4895 obj
= Fsymbol_name (Fprocess_status (obj
));
4899 case 't': /* indicate TEXT or BINARY */
4900 #ifdef MODE_LINE_BINARY_TEXT
4901 return MODE_LINE_BINARY_TEXT (b
);
4907 /* coding-system (not including end-of-line format) */
4909 /* coding-system (including end-of-line type) */
4911 int eol_flag
= (c
== 'Z');
4912 char *p
= decode_mode_spec_buf
;
4914 if (! FRAME_WINDOW_P (f
))
4916 /* No need to mention EOL here--the terminal never needs
4917 to do EOL conversion. */
4918 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, 0);
4919 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, 0);
4921 p
= decode_mode_spec_coding (b
->buffer_file_coding_system
,
4924 #if 0 /* This proves to be annoying; I think we can do without. -- rms. */
4926 obj
= Fget_buffer_process (Fcurrent_buffer ());
4929 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
4931 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
4934 #endif /* subprocesses */
4937 return decode_mode_spec_buf
;
4942 return (char *) XSTRING (obj
)->data
;
4947 /* Count up to COUNT lines starting from START / START_BYTE.
4948 But don't go beyond LIMIT_BYTE.
4949 Return the number of lines thus found (always nonnegative).
4951 Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */
4954 display_count_lines (start
, start_byte
, limit_byte
, count
, byte_pos_ptr
)
4955 int start
, start_byte
, limit_byte
, count
;
4958 register unsigned char *cursor
;
4959 unsigned char *base
;
4961 register int ceiling
;
4962 register unsigned char *ceiling_addr
;
4963 int orig_count
= count
;
4965 /* If we are not in selective display mode,
4966 check only for newlines. */
4967 int selective_display
= (!NILP (current_buffer
->selective_display
)
4968 && !INTEGERP (current_buffer
->selective_display
));
4972 while (start_byte
< limit_byte
)
4974 ceiling
= BUFFER_CEILING_OF (start_byte
);
4975 ceiling
= min (limit_byte
- 1, ceiling
);
4976 ceiling_addr
= BYTE_POS_ADDR (ceiling
) + 1;
4977 base
= (cursor
= BYTE_POS_ADDR (start_byte
));
4980 if (selective_display
)
4981 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
4984 while (*cursor
!= '\n' && ++cursor
!= ceiling_addr
)
4987 if (cursor
!= ceiling_addr
)
4991 start_byte
+= cursor
- base
+ 1;
4992 *byte_pos_ptr
= start_byte
;
4996 if (++cursor
== ceiling_addr
)
5002 start_byte
+= cursor
- base
;
5007 while (start_byte
> limit_byte
)
5009 ceiling
= BUFFER_FLOOR_OF (start_byte
- 1);
5010 ceiling
= max (limit_byte
, ceiling
);
5011 ceiling_addr
= BYTE_POS_ADDR (ceiling
) - 1;
5012 base
= (cursor
= BYTE_POS_ADDR (start_byte
- 1) + 1);
5015 if (selective_display
)
5016 while (--cursor
!= ceiling_addr
5017 && *cursor
!= '\n' && *cursor
!= 015)
5020 while (--cursor
!= ceiling_addr
&& *cursor
!= '\n')
5023 if (cursor
!= ceiling_addr
)
5027 start_byte
+= cursor
- base
+ 1;
5028 *byte_pos_ptr
= start_byte
;
5029 /* When scanning backwards, we should
5030 not count the newline posterior to which we stop. */
5031 return - orig_count
- 1;
5037 /* Here we add 1 to compensate for the last decrement
5038 of CURSOR, which took it past the valid range. */
5039 start_byte
+= cursor
- base
+ 1;
5043 *byte_pos_ptr
= limit_byte
;
5046 return - orig_count
+ count
;
5047 return orig_count
- count
;
5051 /* Display STRING on one line of window W, starting at HPOS.
5052 Display at position VPOS. Caller should have done get_display_line.
5053 If VPOS == -1, display it as the current frame's title.
5054 LENGTH is the length of STRING, or -1 meaning STRING is null-terminated.
5056 TRUNCATE is GLYPH to display at end if truncated. Zero for none.
5058 MINCOL is the first column ok to end at. (Pad with spaces to this col.)
5059 MAXCOL is the last column ok to end at. Truncate here.
5060 -1 for MINCOL or MAXCOL means no explicit minimum or maximum.
5061 Both count from the left edge of the frame, as does HPOS.
5062 The right edge of W is an implicit maximum.
5063 If TRUNCATE is nonzero, the implicit maximum is one column before the edge.
5065 OBEY_WINDOW_WIDTH says to put spaces or vertical bars
5066 at the place where the current window ends in this line
5067 and not display anything beyond there. Otherwise, only MAXCOL
5068 controls where to stop output.
5070 MULTIBYTE can be 0 meaning do not display multibyte chars,
5071 1 meaning do display them, or -1 meaning obey the current buffer's
5072 value of enable_multibyte_characters.
5074 Returns ending hpos. */
5077 display_string (w
, vpos
, string
, length
, hpos
, truncate
,
5078 obey_window_width
, mincol
, maxcol
, multibyte
)
5080 unsigned char *string
;
5084 int obey_window_width
;
5091 int hscroll
= XINT (w
->hscroll
);
5092 int tab_width
= XINT (XBUFFER (w
->buffer
)->tab_width
);
5093 register GLYPH
*start
;
5094 register GLYPH
*end
;
5095 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
5096 struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
5097 GLYPH
*p1start
= desired_glyphs
->glyphs
[vpos
] + hpos
;
5098 int window_width
= XFASTINT (w
->width
);
5100 /* Use the standard display table, not the window's display table.
5101 We don't want the mode line in rot13. */
5102 register struct Lisp_Char_Table
*dp
= 0;
5105 if (multibyte
== -1)
5106 multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
5107 /* Now multibyte is 1 if we should display multibyte characters. */
5109 if (DISP_TABLE_P (Vstandard_display_table
))
5110 dp
= XCHAR_TABLE (Vstandard_display_table
);
5112 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
5115 start
= desired_glyphs
->glyphs
[vpos
];
5117 if (obey_window_width
)
5119 start
+= XFASTINT (w
->left
);
5120 end
= start
+ window_width
- (truncate
!= 0);
5122 if (!WINDOW_RIGHTMOST_P (w
))
5124 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
5128 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
5131 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
5136 if (! obey_window_width
5137 || (maxcol
>= 0 && end
- desired_glyphs
->glyphs
[vpos
] > maxcol
))
5138 end
= desired_glyphs
->glyphs
[vpos
] + maxcol
;
5140 /* Store 0 in charstart for these columns. */
5141 for (i
= (hpos
>= 0 ? hpos
: 0); i
< end
- p1start
+ hpos
; i
++)
5142 desired_glyphs
->charstarts
[vpos
][i
] = 0;
5144 if (maxcol
>= 0 && mincol
> maxcol
)
5148 /* We need this value for multibyte characters. */
5149 length
= strlen (string
);
5151 /* We set truncated to 1 if we get stopped by trying to pass END
5152 (that is, trying to pass MAXCOL.) */
5161 c
= STRING_CHAR_AND_LENGTH (string
, length
, len
);
5163 c
= *string
, len
= 1;
5165 string
+= len
, length
-= len
;
5173 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
5175 p1
= copy_part_of_rope (f
, p1
, start
,
5176 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
5177 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
5180 else if (c
>= 040 && c
< 0177)
5190 if (p1
>= start
&& p1
< end
)
5194 while ((p1
- start
+ hscroll
- (hscroll
> 0)) % tab_width
);
5196 else if (c
< 0200 && ! NILP (buffer_defaults
.ctl_arrow
))
5200 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
5201 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
5202 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
5205 if (p1
>= start
&& p1
< end
)
5211 /* C is a control character or a binary byte data. */
5214 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
5215 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
5216 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
5219 if (p1
>= start
&& p1
< end
)
5220 *p1
= (c
>> 6) + '0';
5222 if (p1
>= start
&& p1
< end
)
5223 *p1
= (7 & (c
>> 3)) + '0';
5225 if (p1
>= start
&& p1
< end
)
5226 *p1
= (7 & c
) + '0';
5231 /* C is a multibyte character. */
5232 int charset
= CHAR_CHARSET (c
);
5233 int columns
= (charset
== CHARSET_COMPOSITION
5234 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
5235 : CHARSET_WIDTH (charset
));
5239 /* Since we can't show the left part of C, fill all
5240 columns with spaces. */
5241 columns
-= start
- p1
;
5250 else if (p1
+ columns
> end
)
5252 /* Since we can't show the right part of C, fill all
5253 columns with TRUNCATE if TRUNCATE is specified. */
5257 *p1
++ = fix_glyph (f
, truncate
, 0);
5258 /* And tell the line is truncated. */
5265 /* We can show the whole glyph of C. */
5268 *p1
++ = c
| GLYPH_MASK_PADDING
;
5276 if (truncate
) *p1
++ = fix_glyph (f
, truncate
, 0);
5278 else if (mincol
>= 0)
5280 end
= desired_glyphs
->glyphs
[vpos
] + mincol
;
5286 register int len
= p1
- desired_glyphs
->glyphs
[vpos
];
5288 if (len
> desired_glyphs
->used
[vpos
])
5289 desired_glyphs
->used
[vpos
] = len
;
5290 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
5296 /* This is like a combination of memq and assq.
5297 Return 1 if PROPVAL appears as an element of LIST
5298 or as the car of an element of LIST.
5299 If PROPVAL is a list, compare each element against LIST
5300 in that way, and return 1 if any element of PROPVAL is found in LIST.
5302 This function cannot quit. */
5305 invisible_p (propval
, list
)
5306 register Lisp_Object propval
;
5309 register Lisp_Object tail
, proptail
;
5310 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5312 register Lisp_Object tem
;
5313 tem
= XCONS (tail
)->car
;
5314 if (EQ (propval
, tem
))
5316 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5319 if (CONSP (propval
))
5320 for (proptail
= propval
; CONSP (proptail
);
5321 proptail
= XCONS (proptail
)->cdr
)
5323 Lisp_Object propelt
;
5324 propelt
= XCONS (proptail
)->car
;
5325 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5327 register Lisp_Object tem
;
5328 tem
= XCONS (tail
)->car
;
5329 if (EQ (propelt
, tem
))
5331 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5338 /* Return 1 if PROPVAL appears as the car of an element of LIST
5339 and the cdr of that element is non-nil.
5340 If PROPVAL is a list, check each element of PROPVAL in that way,
5341 and the first time some element is found,
5342 return 1 if the cdr of that element is non-nil.
5344 This function cannot quit. */
5347 invisible_ellipsis_p (propval
, list
)
5348 register Lisp_Object propval
;
5351 register Lisp_Object tail
, proptail
;
5352 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5354 register Lisp_Object tem
;
5355 tem
= XCONS (tail
)->car
;
5356 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5357 return ! NILP (XCONS (tem
)->cdr
);
5359 if (CONSP (propval
))
5360 for (proptail
= propval
; CONSP (proptail
);
5361 proptail
= XCONS (proptail
)->cdr
)
5363 Lisp_Object propelt
;
5364 propelt
= XCONS (proptail
)->car
;
5365 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5367 register Lisp_Object tem
;
5368 tem
= XCONS (tail
)->car
;
5369 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5370 return ! NILP (XCONS (tem
)->cdr
);
5379 staticpro (&Qmenu_bar_update_hook
);
5380 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
5382 staticpro (&Qoverriding_terminal_local_map
);
5383 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
5385 staticpro (&Qoverriding_local_map
);
5386 Qoverriding_local_map
= intern ("overriding-local-map");
5388 staticpro (&Qwindow_scroll_functions
);
5389 Qwindow_scroll_functions
= intern ("window-scroll-functions");
5391 staticpro (&Qredisplay_end_trigger_functions
);
5392 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
5394 staticpro (&Qinhibit_point_motion_hooks
);
5395 Qinhibit_point_motion_hooks
= intern ("inhibit-point-motion-hooks");
5397 staticpro (&last_arrow_position
);
5398 staticpro (&last_arrow_string
);
5399 last_arrow_position
= Qnil
;
5400 last_arrow_string
= Qnil
;
5402 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
5403 "String (or mode line construct) included (normally) in `mode-line-format'.");
5404 Vglobal_mode_string
= Qnil
;
5406 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
5407 "Marker for where to display an arrow on top of the buffer text.\n\
5408 This must be the beginning of a line in order to work.\n\
5409 See also `overlay-arrow-string'.");
5410 Voverlay_arrow_position
= Qnil
;
5412 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
5413 "String to display as an arrow. See also `overlay-arrow-position'.");
5414 Voverlay_arrow_string
= Qnil
;
5416 DEFVAR_INT ("scroll-step", &scroll_step
,
5417 "*The number of lines to try scrolling a window by when point moves out.\n\
5418 If that fails to bring point back on frame, point is centered instead.\n\
5419 If this is zero, point is always centered after it moves off frame.");
5421 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
5422 "*Scroll up to this many lines, to bring point back on screen.");
5423 scroll_conservatively
= 0;
5425 DEFVAR_INT ("scroll-margin", &scroll_margin
,
5426 "*Number of lines of margin at the top and bottom of a window.\n\
5427 Recenter the window whenever point gets within this many lines\n\
5428 of the top or bottom of the window.");
5431 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
5433 DEFVAR_BOOL ("truncate-partial-width-windows",
5434 &truncate_partial_width_windows
,
5435 "*Non-nil means truncate lines in all windows less than full frame wide.");
5436 truncate_partial_width_windows
= 1;
5438 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
5439 "*Non-nil means use inverse video for the mode line.");
5440 mode_line_inverse_video
= 1;
5442 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
5443 "*Maximum buffer size (in characters) for line number display\n\
5444 If the buffer is bigger than this, the line number does not appear\n\
5445 in the mode line..");
5446 line_number_display_limit
= 1000000;
5448 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
5449 "*Non-nil means highlight region even in nonselected windows.");
5450 highlight_nonselected_windows
= 0;
5452 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
5453 "Non-nil if more than one frame is visible on this display.\n\
5454 Minibuffer-only frames don't count, but iconified frames do.\n\
5455 This variable is not guaranteed to be accurate except while processing\n\
5456 `frame-title-format' and `icon-title-format'.");
5458 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
5459 "Template for displaying the titlebar of visible frames.\n\
5460 \(Assuming the window manager supports this feature.)\n\
5461 This variable has the same structure as `mode-line-format' (which see),\n\
5462 and is used only on frames for which no explicit name has been set\n\
5463 \(see `modify-frame-parameters').");
5464 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
5465 "Template for displaying the titlebar of an iconified frame.\n\
5466 \(Assuming the window manager supports this feature.)\n\
5467 This variable has the same structure as `mode-line-format' (which see),\n\
5468 and is used only on frames for which no explicit name has been set\n\
5469 \(see `modify-frame-parameters').");
5471 = Vframe_title_format
5472 = Fcons (intern ("multiple-frames"),
5473 Fcons (build_string ("%b"),
5474 Fcons (Fcons (build_string (""),
5475 Fcons (intern ("invocation-name"),
5476 Fcons (build_string ("@"),
5477 Fcons (intern ("system-name"),
5481 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
5482 "Maximum number of lines to keep in the message log buffer.\n\
5483 If nil, disable message logging. If t, log messages but don't truncate\n\
5484 the buffer when it becomes large.");
5485 XSETFASTINT (Vmessage_log_max
, 50);
5487 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
5488 "Functions called before redisplay, if window sizes have changed.\n\
5489 The value should be a list of functions that take one argument.\n\
5490 Just before redisplay, for each frame, if any of its windows have changed\n\
5491 size since the last redisplay, or have been split or deleted,\n\
5492 all the functions in the list are called, with the frame as argument.");
5493 Vwindow_size_change_functions
= Qnil
;
5495 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
5496 "List of functions to call before redisplaying a window with scrolling.\n\
5497 Each function is called with two arguments, the window\n\
5498 and its new display-start position. Note that the value of `window-end'\n\
5499 is not valid when these functions are called.");
5500 Vwindow_scroll_functions
= Qnil
;
5502 DEFVAR_INT ("minibuffer-scroll-overlap", &minibuffer_scroll_overlap
,
5503 "*Number of characters of overlap when scrolling a one-line window.\n\
5504 This commonly affects the minibuffer window, hence the name of the variable.");
5505 minibuffer_scroll_overlap
= 20;
5508 /* initialize the window system */
5512 Lisp_Object root_window
;
5513 #ifndef COMPILER_REGISTER_BUG
5515 #endif /* COMPILER_REGISTER_BUG */
5516 struct window
*mini_w
;
5518 this_line_bufpos
= 0;
5520 mini_w
= XWINDOW (minibuf_window
);
5521 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
5523 echo_area_glyphs
= 0;
5524 previous_echo_glyphs
= 0;
5526 if (!noninteractive
)
5528 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
5529 XSETFASTINT (XWINDOW (root_window
)->top
, FRAME_MENU_BAR_LINES (f
));
5530 set_window_height (root_window
,
5531 FRAME_HEIGHT (f
) - 1 - FRAME_MENU_BAR_LINES (f
),
5533 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
5534 set_window_height (minibuf_window
, 1, 0);
5536 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
5537 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));