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
);
1957 XSETFASTINT (w
->last_modified
, 0);
1958 XSETFASTINT (w
->last_overlay_modified
, 0);
1959 if (startp
< BEGV
) startp
= BEGV
, startp_byte
= BEGV_BYTE
;
1960 if (startp
> ZV
) startp
= ZV
, startp
= ZV_BYTE
;
1961 try_window (window
, startp
);
1962 if (cursor_vpos
< 0)
1964 /* If point does not appear, move point so it does appear */
1965 pos
= *compute_motion (startp
, 0,
1966 (((EQ (window
, minibuf_window
)
1968 ? minibuf_prompt_width
: 0)
1969 + (hscroll
? 1 - hscroll
: 0)),
1972 - (1 << (BITS_PER_SHORT
- 1)),
1974 pos_tab_offset (w
, startp
, startp_byte
),
1976 TEMP_SET_PT_BOTH (pos
.bufpos
, pos
.bytepos
);
1977 if (w
!= XWINDOW (selected_window
))
1978 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
1981 if (current_buffer
== old
)
1984 lpoint_byte
= PT_BYTE
;
1986 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
1987 + minmax (0, pos
.hpos
, width
));
1988 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1990 /* If we are highlighting the region,
1991 then we just changed the region, so redisplay to show it. */
1992 if (!NILP (Vtransient_mark_mode
)
1993 && !NILP (current_buffer
->mark_active
))
1995 cancel_my_columns (XWINDOW (window
));
1996 try_window (window
, startp
);
2002 /* Handle case where text has not changed, only point,
2003 and it has not moved off the frame. */
2005 /* This code is not used for minibuffer for the sake of
2006 the case of redisplaying to replace an echo area message;
2007 since in that case the minibuffer contents per se are usually unchanged.
2008 This code is of no real use in the minibuffer since
2009 the handling of this_line_bufpos, etc.,
2010 in redisplay handles the same cases. */
2012 if (XFASTINT (w
->last_modified
) >= MODIFF
2013 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
2014 && PT
>= startp
&& !current_buffer
->clip_changed
2015 && (just_this_one
|| WINDOW_FULL_WIDTH_P (w
))
2016 /* If force-mode-line-update was called, really redisplay;
2017 that's how redisplay is forced after e.g. changing
2018 buffer-invisibility-spec. */
2019 && NILP (w
->update_mode_line
)
2020 /* Can't use this case if highlighting a region. */
2021 && !(!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
2022 && NILP (w
->region_showing
)
2023 /* If end pos is out of date, scroll bar and percentage will be wrong */
2024 && INTEGERP (w
->window_end_vpos
)
2025 && XFASTINT (w
->window_end_vpos
) < XFASTINT (w
->height
)
2026 && !EQ (window
, minibuf_window
)
2027 && (!MARKERP (Voverlay_arrow_position
)
2028 || current_buffer
!= XMARKER (Voverlay_arrow_position
)->buffer
))
2030 /* All positions in this clause are relative to the window edge. */
2032 int this_scroll_margin
= scroll_margin
;
2033 int last_point_y
= XFASTINT (w
->last_point_y
) - XINT (w
->top
);
2034 int last_point_x
= (XFASTINT (w
->last_point_x
) - WINDOW_LEFT_MARGIN (w
));
2036 /* Find where PT is located now on the frame. */
2037 /* Check just_this_one as a way of verifying that the
2038 window edges have not changed. */
2039 if (PT
== XFASTINT (w
->last_point
) && just_this_one
)
2041 pos
.hpos
= last_point_x
;
2042 pos
.vpos
= last_point_y
;
2045 else if (PT
> XFASTINT (w
->last_point
)
2046 && XFASTINT (w
->last_point
) > startp
&& just_this_one
2047 /* We can't use this if point is in the left margin of a
2048 hscrolled window, because w->last_point_x has been
2049 clipped to the window edges. */
2050 && !(last_point_x
<= 0 && hscroll
))
2052 int last_point
= XFASTINT (w
->last_point
);
2053 int last_point_byte
= CHAR_TO_BYTE (last_point
);
2054 int tab_offset
= (pos_tab_offset (w
, last_point
, last_point_byte
)
2055 - (last_point_x
+ hscroll
- !! hscroll
));
2057 pos
= *compute_motion (last_point
, last_point_y
, last_point_x
, 0,
2059 /* BUG FIX: See the comment of
2060 Fpos_visible_in_window_p (window.c). */
2061 - (1 << (BITS_PER_SHORT
- 1)),
2068 pos
= *compute_motion (startp
, 0, (hscroll
? 1 - hscroll
: 0), 0,
2070 /* BUG FIX: See the comment of
2071 Fpos_visible_in_window_p (window.c). */
2072 - (1 << (BITS_PER_SHORT
- 1)),
2074 pos_tab_offset (w
, startp
, startp_byte
),
2078 /* Don't use a scroll margin that is negative or too large. */
2079 if (this_scroll_margin
< 0)
2080 this_scroll_margin
= 0;
2082 if (XINT (w
->height
) < 4 * scroll_margin
)
2083 this_scroll_margin
= XINT (w
->height
) / 4;
2085 /* If point fits on the screen, and not within the scroll margin,
2087 if (pos
.vpos
< height
- this_scroll_margin
2088 && (pos
.vpos
>= this_scroll_margin
|| startp
== BEGV
))
2090 /* Ok, point is still on frame */
2091 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
2093 /* These variables are supposed to be origin 1 */
2094 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
2095 + minmax (0, pos
.hpos
, width
));
2096 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
2098 /* This doesn't do the trick, because if a window to the right of
2099 this one must be redisplayed, this does nothing because there
2100 is nothing in DesiredFrame yet, and then the other window is
2101 redisplayed, making likes that are empty in this window's columns.
2102 if (WINDOW_FULL_WIDTH_P (w))
2103 preserve_my_columns (w);
2105 if (current_buffer
->clip_changed
2106 && ! NILP (Vwindow_scroll_functions
))
2107 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2108 make_number (marker_position (w
->start
)));
2112 /* Don't bother trying redisplay with same start;
2113 we already know it will lose */
2115 /* If current starting point was originally the beginning of a line
2116 but no longer is, find a new starting point. */
2117 else if (!NILP (w
->start_at_line_beg
)
2119 || FETCH_BYTE (startp_byte
- 1) == '\n'))
2123 else if (just_this_one
&& !MINI_WINDOW_P (w
)
2125 && XFASTINT (w
->last_modified
)
2126 /* or else vmotion on first line won't work. */
2127 && ! NILP (w
->start_at_line_beg
)
2128 && ! EQ (w
->window_end_valid
, Qnil
)
2129 && do_id
&& !current_buffer
->clip_changed
2130 && !blank_end_of_window
2131 && WINDOW_FULL_WIDTH_P (w
)
2132 /* Can't use this case if highlighting a region. */
2133 && !(!NILP (Vtransient_mark_mode
)
2134 && !NILP (current_buffer
->mark_active
))
2135 /* Don't use try_window_id if newline
2136 doesn't display as the end of a line. */
2137 && !(dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, '\n')))
2138 && NILP (w
->region_showing
)
2139 && EQ (last_arrow_position
, COERCE_MARKER (Voverlay_arrow_position
))
2140 && EQ (last_arrow_string
, Voverlay_arrow_string
)
2141 && (tem
= try_window_id (FRAME_SELECTED_WINDOW (f
)))
2144 /* tem > 0 means success. tem == -1 means choose new start.
2145 tem == -2 means try again with same start,
2146 and nothing but whitespace follows the changed stuff.
2147 tem == 0 means try again with same start. */
2151 else if (startp
>= BEGV
&& startp
<= ZV
2153 /* Avoid starting at end of buffer. */
2154 #if 0 /* This change causes trouble for M-! finger & RET.
2155 It will have to be considered later. */
2156 || ! EQ (window
, selected_window
)
2157 /* Don't do the recentering if redisplay
2158 is not for no user action. */
2159 || preserve_echo_area
2162 || (XFASTINT (w
->last_modified
) >= MODIFF
2163 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
2165 /* Try to redisplay starting at same place as before */
2166 /* If point has not moved off frame, accept the results */
2167 try_window (window
, startp
);
2168 if (cursor_vpos
>= 0)
2170 if (!just_this_one
|| current_buffer
->clip_changed
2171 || beg_unchanged
< startp
)
2172 /* Forget any recorded base line for line number display. */
2173 w
->base_line_number
= Qnil
;
2175 if (current_buffer
->clip_changed
2176 && ! NILP (Vwindow_scroll_functions
))
2177 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2178 make_number (marker_position (w
->start
)));
2183 cancel_my_columns (w
);
2186 XSETFASTINT (w
->last_modified
, 0);
2187 XSETFASTINT (w
->last_overlay_modified
, 0);
2188 /* Redisplay the mode line. Select the buffer properly for that. */
2189 if (!update_mode_line
)
2191 if (!really_switched_buffer
)
2193 set_buffer_temp (old
);
2194 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2196 update_mode_line
= 1;
2197 w
->update_mode_line
= Qt
;
2200 /* Try to scroll by specified few lines */
2202 if (scroll_conservatively
&& !current_buffer
->clip_changed
2203 && startp
>= BEGV
&& startp
<= ZV
)
2205 int this_scroll_margin
= scroll_margin
;
2206 int scroll_margin_pos
;
2208 /* Don't use a scroll margin that is negative or too large. */
2209 if (this_scroll_margin
< 0)
2210 this_scroll_margin
= 0;
2212 if (XINT (w
->height
) < 4 * this_scroll_margin
)
2213 this_scroll_margin
= XINT (w
->height
) / 4;
2215 scroll_margin_pos
= Z
- XFASTINT (w
->window_end_pos
);
2216 if (this_scroll_margin
)
2218 pos
= *vmotion (scroll_margin_pos
, -this_scroll_margin
, w
);
2219 scroll_margin_pos
= pos
.bufpos
;
2221 if (PT
>= scroll_margin_pos
)
2223 struct position pos
;
2224 pos
= *compute_motion (scroll_margin_pos
, 0, 0, 0,
2225 PT
, XFASTINT (w
->height
), 0,
2226 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2227 pos_tab_offset (w
, startp
, startp_byte
),
2229 if (pos
.vpos
> scroll_conservatively
)
2232 pos
= *vmotion (startp
, pos
.vpos
+ 1, w
);
2234 if (! NILP (Vwindow_scroll_functions
))
2236 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2237 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2238 make_number (pos
.bufpos
));
2239 pos
.bufpos
= marker_position (w
->start
);
2241 try_window (window
, pos
.bufpos
);
2242 if (cursor_vpos
>= 0)
2244 if (!just_this_one
|| current_buffer
->clip_changed
2245 || beg_unchanged
< startp
)
2246 /* Forget any recorded base line for line number display. */
2247 w
->base_line_number
= Qnil
;
2251 cancel_my_columns (w
);
2254 scroll_margin_pos
= startp
;
2255 if (this_scroll_margin
)
2257 pos
= *vmotion (scroll_margin_pos
, this_scroll_margin
, w
);
2258 scroll_margin_pos
= pos
.bufpos
;
2260 if (PT
< scroll_margin_pos
)
2262 struct position pos
;
2263 pos
= *compute_motion (PT
, 0, 0, 0,
2264 scroll_margin_pos
, XFASTINT (w
->height
), 0,
2265 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2266 pos_tab_offset (w
, startp
, startp_byte
),
2268 if (pos
.vpos
> scroll_conservatively
)
2271 pos
= *vmotion (startp
, -pos
.vpos
, w
);
2273 if (! NILP (Vwindow_scroll_functions
))
2275 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2276 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2277 make_number (pos
.bufpos
));
2278 pos
.bufpos
= marker_position (w
->start
);
2280 try_window (window
, pos
.bufpos
);
2281 if (cursor_vpos
>= 0)
2283 if (!just_this_one
|| current_buffer
->clip_changed
2284 || beg_unchanged
< startp
)
2285 /* Forget any recorded base line for line number display. */
2286 w
->base_line_number
= Qnil
;
2290 cancel_my_columns (w
);
2295 if (scroll_step
&& !current_buffer
->clip_changed
2296 && startp
>= BEGV
&& startp
<= ZV
)
2300 pos
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), scroll_step
, w
);
2301 if (pos
.vpos
>= height
)
2305 pos
= *vmotion (startp
, (PT
< startp
? - scroll_step
: scroll_step
), w
);
2307 if (PT
>= pos
.bufpos
)
2309 if (! NILP (Vwindow_scroll_functions
))
2311 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2312 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2313 make_number (pos
.bufpos
));
2314 pos
.bufpos
= marker_position (w
->start
);
2316 try_window (window
, pos
.bufpos
);
2317 if (cursor_vpos
>= 0)
2319 if (!just_this_one
|| current_buffer
->clip_changed
2320 || beg_unchanged
< startp
)
2321 /* Forget any recorded base line for line number display. */
2322 w
->base_line_number
= Qnil
;
2326 cancel_my_columns (w
);
2331 /* Finally, just choose place to start which centers point */
2334 /* Forget any previously recorded base line for line number display. */
2335 w
->base_line_number
= Qnil
;
2337 pos
= *vmotion (PT
, - (height
/ 2), w
);
2339 /* The minibuffer is often just one line. Ordinary scrolling
2340 gives little overlap and looks bad. So show 20 chars before point. */
2342 && (pos
.bufpos
>= PT
- minibuffer_scroll_overlap
2343 /* If we scrolled less than 1/2 line forward, we will
2344 get too much overlap, so change to the usual amount. */
2345 || pos
.bufpos
< startp
+ width
/ 2)
2346 && PT
> BEGV
+ minibuffer_scroll_overlap
2347 /* If we scrolled to an actual line boundary,
2348 that's different; don't ignore line boundaries. */
2349 && FETCH_BYTE (pos
.bytepos
- 1) != '\n')
2351 pos
.bufpos
= PT
- minibuffer_scroll_overlap
;
2352 pos
.bytepos
= CHAR_TO_BYTE (pos
.bufpos
);
2355 /* Set startp here explicitly in case that helps avoid an infinite loop
2356 in case the window-scroll-functions functions get errors. */
2357 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2358 if (! NILP (Vwindow_scroll_functions
))
2360 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2361 make_number (pos
.bufpos
));
2362 pos
.bufpos
= marker_position (w
->start
);
2363 pos
.bytepos
= marker_byte_position (w
->start
);
2365 try_window (window
, pos
.bufpos
);
2367 startp
= marker_position (w
->start
);
2368 startp_byte
= marker_byte_position (w
->start
);
2369 w
->start_at_line_beg
2370 = (startp
== BEGV
|| FETCH_BYTE (startp_byte
- 1) == '\n') ? Qt
: Qnil
;
2373 if ((update_mode_line
2374 /* If window not full width, must redo its mode line
2375 if the window to its side is being redone */
2376 || (!just_this_one
&& !WINDOW_FULL_WIDTH_P (w
))
2377 || INTEGERP (w
->base_line_pos
)
2378 || (!NILP (w
->column_number_displayed
)
2379 && XFASTINT (w
->column_number_displayed
) != current_column ()))
2380 && height
!= XFASTINT (w
->height
))
2382 FRAME_PTR oframe
= selected_frame
;
2383 if (!really_switched_buffer
)
2385 set_buffer_temp (old
);
2386 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2387 really_switched_buffer
= 1;
2390 display_mode_line (w
);
2391 selected_frame
= oframe
;
2393 if (! line_number_displayed
2394 && ! BUFFERP (w
->base_line_pos
))
2396 w
->base_line_pos
= Qnil
;
2397 w
->base_line_number
= Qnil
;
2400 /* When we reach a frame's selected window, redo the frame's menu bar. */
2401 if (update_mode_line
2402 && (FRAME_WINDOW_P (f
)
2404 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
2405 FRAME_EXTERNAL_MENU_BAR (f
)
2407 FRAME_MENU_BAR_LINES (f
) > 0
2409 : FRAME_MENU_BAR_LINES (f
) > 0)
2410 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
2411 display_menu_bar (w
);
2414 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2416 int start
, end
, whole
;
2418 /* Calculate the start and end positions for the current window.
2419 At some point, it would be nice to choose between scrollbars
2420 which reflect the whole buffer size, with special markers
2421 indicating narrowing, and scrollbars which reflect only the
2424 Note that minibuffers sometimes aren't displaying any text. */
2425 if (! MINI_WINDOW_P (w
)
2426 || (w
== XWINDOW (minibuf_window
) && ! echo_area_glyphs
))
2429 start
= marker_position (w
->start
) - BEGV
;
2430 /* I don't think this is guaranteed to be right. For the
2431 moment, we'll pretend it is. */
2432 end
= (Z
- XINT (w
->window_end_pos
)) - BEGV
;
2434 if (end
< start
) end
= start
;
2435 if (whole
< (end
- start
)) whole
= end
- start
;
2438 start
= end
= whole
= 0;
2440 /* Indicate what this scroll bar ought to be displaying now. */
2441 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
2443 /* Note that we actually used the scroll bar attached to this window,
2444 so it shouldn't be deleted at the end of redisplay. */
2445 (*redeem_scroll_bar_hook
) (w
);
2448 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
2449 if (really_switched_buffer
)
2450 set_buffer_internal_1 (old
);
2452 set_buffer_temp (old
);
2453 TEMP_SET_PT_BOTH (lpoint
, lpoint_byte
);
2455 unbind_to (count
, Qnil
);
2458 /* Do full redisplay on one window, starting at position `pos'. */
2461 try_window (window
, pos
)
2465 register struct window
*w
= XWINDOW (window
);
2466 register int height
= window_internal_height (w
);
2467 register int vpos
= XFASTINT (w
->top
);
2468 register int last_text_vpos
= vpos
;
2469 FRAME_PTR f
= XFRAME (w
->frame
);
2470 int width
= window_internal_width (w
) - 1;
2471 struct position val
;
2473 /* POS should never be out of range! */
2474 if (pos
< XBUFFER (w
->buffer
)->begv
2475 || pos
> XBUFFER (w
->buffer
)->zv
)
2478 if (XMARKER (w
->start
)->charpos
!= pos
)
2479 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2482 overlay_arrow_seen
= 0;
2483 zv_strings_seen
= 0;
2484 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
2485 val
.ovstring_chars_done
= 0;
2486 val
.bytepos
= marker_byte_position (w
->start
);
2487 val
.tab_offset
= pos_tab_offset (w
, pos
, val
.bytepos
);
2489 while (--height
>= 0)
2491 val
= *display_text_line (w
, pos
, val
.bytepos
, vpos
,
2492 val
.hpos
, val
.tab_offset
,
2493 val
.ovstring_chars_done
);
2494 /* The following code is omitted because we maintain tab_offset
2497 tab_offset
+= width
;
2498 if (val
.vpos
) tab_offset
= 0;
2501 if (pos
!= val
.bufpos
)
2504 #ifdef USE_TEXT_PROPERTIES
2505 Lisp_Object invis_prop
;
2506 invis_prop
= Fget_char_property (make_number (val
.bufpos
- 1),
2507 Qinvisible
, window
);
2508 invis
= TEXT_PROP_MEANS_INVISIBLE (invis_prop
);
2512 /* Next line, unless prev line ended in end of buffer with no cr */
2514 && (FETCH_BYTE (val
.bytepos
- 1) != '\n' || invis
));
2519 /* If last line is continued in middle of character,
2520 include the split character in the text considered on the frame */
2521 if (val
.hpos
< (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
2524 /* If bottom just moved off end of frame, change mode line percentage. */
2525 if (XFASTINT (w
->window_end_pos
) == 0
2527 w
->update_mode_line
= Qt
;
2529 /* Say where last char on frame will be, once redisplay is finished. */
2530 XSETFASTINT (w
->window_end_pos
, Z
- pos
);
2531 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
- XFASTINT (w
->top
));
2532 /* But that is not valid info until redisplay finishes. */
2533 w
->window_end_valid
= Qnil
;
2536 /* Try to redisplay when buffer is modified locally,
2537 computing insert/delete line to preserve text outside
2538 the bounds of the changes.
2539 Return 1 if successful, 0 if if cannot tell what to do,
2540 or -1 to tell caller to find a new window start,
2541 or -2 to tell caller to do normal redisplay with same window start. */
2544 try_window_id (window
)
2548 int opoint
, opoint_byte
;
2549 register struct window
*w
= XWINDOW (window
);
2550 register int height
= window_internal_height (w
);
2551 FRAME_PTR f
= XFRAME (w
->frame
);
2552 int top
= XFASTINT (w
->top
);
2553 int start
= marker_position (w
->start
);
2554 int width
= window_internal_width (w
) - 1;
2555 int hscroll
= XINT (w
->hscroll
);
2556 int lmargin
= hscroll
> 0 ? 1 - hscroll
: 0;
2559 register int i
, tem
;
2560 int last_text_vpos
= 0;
2562 int selective
= (INTEGERP (current_buffer
->selective_display
)
2563 ? XINT (current_buffer
->selective_display
)
2564 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2565 struct position val
, bp
, ep
, xp
, pp
;
2566 int scroll_amount
= 0;
2570 int start_byte
= marker_byte_position (w
->start
);
2572 if (GPT
- BEG
< beg_unchanged
)
2573 beg_unchanged
= GPT
- BEG
;
2574 if (Z
- GPT
< end_unchanged
)
2575 end_unchanged
= Z
- GPT
;
2577 if (beg_unchanged
+ BEG
< start
)
2578 return 0; /* Give up if changes go above top of window */
2580 /* Find position before which nothing is changed. */
2581 bp
= *compute_motion (start
, 0, lmargin
, 0,
2582 min (ZV
, beg_unchanged
+ BEG
), height
,
2583 /* BUG FIX: See the comment of
2584 Fpos_visible_in_window_p (window.c). */
2585 - (1 << (BITS_PER_SHORT
- 1)),
2587 pos_tab_offset (w
, start
, start_byte
),
2589 if (bp
.vpos
>= height
)
2593 /* All changes are beyond the window end, and point is on the screen.
2594 We don't need to change the text at all.
2595 But we need to update window_end_pos to account for
2596 any change in buffer size. */
2597 bp
= *compute_motion (start
, 0, lmargin
, 0,
2599 /* BUG FIX: See the comment of
2600 Fpos_visible_in_window_p() (window.c). */
2601 - (1 << (BITS_PER_SHORT
- 1)),
2603 pos_tab_offset (w
, start
, start_byte
), w
);
2604 XSETFASTINT (w
->window_end_vpos
, height
);
2605 XSETFASTINT (w
->window_end_pos
, Z
- bp
.bufpos
);
2613 /* Find beginning of that frame line. Must display from there. */
2614 bp
= *vmotion (bp
.bufpos
, 0, w
);
2617 pos_byte
= bp
.bytepos
;
2623 /* If about to start displaying at the beginning of a continuation line,
2624 really start with previous frame line, in case it was not
2625 continued when last redisplayed */
2626 if ((bp
.contin
&& bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0)
2628 /* Likewise if we have to worry about selective display. */
2629 (selective
> 0 && bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0))
2631 bp
= *vmotion (bp
.bufpos
, -1, w
);
2634 pos_byte
= bp
.bytepos
;
2636 val
.tab_offset
= bp
.tab_offset
; /* Update tab offset. */
2638 if (bp
.contin
&& bp
.hpos
!= lmargin
)
2640 val
.hpos
= bp
.prevhpos
- width
+ lmargin
;
2641 val
.tab_offset
= bp
.tab_offset
+ bp
.prevhpos
- width
;
2643 DEC_BOTH (pos
, pos_byte
);
2648 /* Find first visible newline after which no more is changed. */
2649 opoint
= PT
, opoint_byte
= PT_BYTE
;
2650 SET_PT (Z
- max (end_unchanged
, Z
- ZV
));
2651 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2653 while (PT
< ZV
- 1 && indented_beyond_p (PT
, PT_BYTE
, selective
))
2654 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2656 SET_PT_BOTH (opoint
, opoint_byte
);
2658 /* Compute the cursor position after that newline. */
2659 ep
= *compute_motion (pos
, vpos
, val
.hpos
, did_motion
, tem
,
2660 height
, - (1 << (BITS_PER_SHORT
- 1)),
2662 /* We have tab offset in VAL, use it. */
2665 /* If changes reach past the text available on the frame,
2666 just display rest of frame. */
2667 if (ep
.bufpos
> Z
- XFASTINT (w
->window_end_pos
))
2670 stop_vpos
= ep
.vpos
;
2672 /* If no newline before ep, the line ep is on includes some changes
2673 that must be displayed. Make sure we don't stop before it. */
2674 /* Also, if changes reach all the way until ep.bufpos,
2675 it is possible that something was deleted after the
2676 newline before it, so the following line must be redrawn. */
2677 if (stop_vpos
== ep
.vpos
2678 && (ep
.bufpos
== BEGV
2679 || FETCH_BYTE (ep
.bytepos
- 1) != '\n'
2680 || ep
.bufpos
== Z
- end_unchanged
))
2681 stop_vpos
= ep
.vpos
+ 1;
2684 overlay_arrow_seen
= 0;
2685 zv_strings_seen
= 0;
2687 /* If changes do not reach to bottom of window,
2688 figure out how much to scroll the rest of the window */
2689 if (stop_vpos
< height
)
2691 /* Now determine how far up or down the rest of the window has moved */
2692 xp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2693 Z
- XFASTINT (w
->window_end_pos
),
2694 /* Don't care for VPOS... */
2695 1 << (BITS_PER_SHORT
- 1),
2697 1 << (BITS_PER_SHORT
- 1),
2698 width
, hscroll
, ep
.tab_offset
, w
);
2699 scroll_amount
= xp
.vpos
- XFASTINT (w
->window_end_vpos
);
2701 /* Is everything on frame below the changes whitespace?
2702 If so, no scrolling is really necessary. */
2703 for (i
= ep
.bytepos
; i
< xp
.bytepos
; i
++)
2705 tem
= FETCH_BYTE (i
);
2706 if (tem
!= ' ' && tem
!= '\n' && tem
!= '\t')
2709 if (i
== xp
.bytepos
)
2712 XSETFASTINT (w
->window_end_vpos
,
2713 XFASTINT (w
->window_end_vpos
) + scroll_amount
);
2715 /* Before doing any scrolling, verify that point will be on frame. */
2716 if (PT
> ep
.bufpos
&& !(PT
<= xp
.bufpos
&& xp
.vpos
< height
))
2718 if (PT
<= xp
.bufpos
)
2720 pp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2721 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2723 /* We have tab offset in EP, use it. */
2728 pp
= *compute_motion (xp
.bufpos
, xp
.vpos
, xp
.hpos
, 1,
2729 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2731 /* We have tab offset in XP, use it. */
2734 if (pp
.bufpos
< PT
|| pp
.vpos
== height
)
2736 cursor_vpos
= pp
.vpos
+ top
;
2737 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, pp
.hpos
, width
);
2740 if (stop_vpos
- scroll_amount
>= height
2741 || ep
.bufpos
== xp
.bufpos
)
2743 if (scroll_amount
< 0)
2744 stop_vpos
-= scroll_amount
;
2746 /* In this path, we have altered window_end_vpos
2747 and not left it negative.
2748 We must make sure that, in case display is preempted
2749 before the frame changes to reflect what we do here,
2750 further updates will not come to try_window_id
2751 and assume the frame and window_end_vpos match. */
2752 blank_end_of_window
= 1;
2754 else if (!scroll_amount
)
2756 /* Even if we don't need to scroll, we must adjust the
2757 charstarts of subsequent lines (that we won't redisplay)
2758 according to the amount of text inserted or deleted. */
2759 int oldpos
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2760 int adjust
= ep
.bufpos
- oldpos
;
2761 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1, adjust
);
2763 else if (bp
.bufpos
== Z
- end_unchanged
)
2765 /* If reprinting everything is nearly as fast as scrolling,
2766 don't bother scrolling. Can happen if lines are short. */
2767 if (scroll_cost (f
, bp
.vpos
+ top
- scroll_amount
,
2768 top
+ height
- max (0, scroll_amount
),
2770 > xp
.bufpos
- bp
.bufpos
- 20)
2771 /* Return "try normal display with same window-start."
2772 Too bad we can't prevent further scroll-thinking. */
2774 /* If pure deletion, scroll up as many lines as possible.
2775 In common case of killing a line, this can save the
2776 following line from being overwritten by scrolling
2777 and therefore having to be redrawn. */
2778 tem
= scroll_frame_lines (f
, bp
.vpos
+ top
- scroll_amount
,
2779 top
+ height
- max (0, scroll_amount
),
2780 scroll_amount
, bp
.bufpos
);
2785 /* scroll_frame_lines did not properly adjust subsequent
2786 lines' charstarts in the case where the text of the
2787 screen line at bp.vpos has changed.
2788 (This can happen in a deletion that ends in mid-line.)
2789 To adjust properly, we need to make things consistent
2791 So do a second adjust to make that happen.
2792 Note that stop_vpos >= ep.vpos, so it is sufficient
2793 to update the charstarts for lines at ep.vpos and below. */
2795 = FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2796 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1,
2797 ep
.bufpos
- oldstart
);
2800 else if (scroll_amount
)
2802 /* If reprinting everything is nearly as fast as scrolling,
2803 don't bother scrolling. Can happen if lines are short. */
2804 /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an
2805 overestimate of cost of reprinting, since xp.bufpos
2806 would end up below the bottom of the window. */
2807 if (scroll_cost (f
, ep
.vpos
+ top
- scroll_amount
,
2808 top
+ height
- max (0, scroll_amount
),
2810 > xp
.bufpos
- ep
.bufpos
- 20)
2811 /* Return "try normal display with same window-start."
2812 Too bad we can't prevent further scroll-thinking. */
2814 tem
= scroll_frame_lines (f
, ep
.vpos
+ top
- scroll_amount
,
2815 top
+ height
- max (0, scroll_amount
),
2816 scroll_amount
, ep
.bufpos
);
2817 if (!tem
) stop_vpos
= height
;
2821 /* In any case, do not display past bottom of window */
2822 if (stop_vpos
>= height
)
2828 /* Handle case where pos is before w->start --
2829 can happen if part of line had been clipped and is not clipped now */
2830 if (vpos
== 0 && pos
< marker_position (w
->start
))
2831 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2833 val
.bytepos
= pos_byte
;
2835 /* Redisplay the lines where the text was changed */
2836 last_text_vpos
= vpos
;
2837 /* The following code is omitted because we maintain tab offset in
2840 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2841 /* If we are starting display in mid-character, correct tab_offset
2842 to account for passing the line that that character really starts in. */
2843 if (val
.hpos
< lmargin
)
2844 tab_offset
+= width
;
2847 while (vpos
< stop_vpos
)
2849 val
= *display_text_line (w
, pos
, val
.bytepos
, top
+ vpos
++,
2850 val
.hpos
, val
.tab_offset
,
2851 val
.ovstring_chars_done
);
2852 /* If display_text_line ran a hook and changed some text,
2853 redisplay all the way to bottom of buffer
2854 So that we show the changes. */
2855 if (old_tick
!= MODIFF
)
2857 /* The following code is omitted because we maintain tab offset
2858 in val.tab_offset. */
2860 tab_offset
+= width
;
2861 if (val
.vpos
) tab_offset
= 0;
2863 if (pos
!= val
.bufpos
)
2865 /* Next line, unless prev line ended in end of buffer with no cr */
2866 = vpos
- (val
.vpos
&& FETCH_BYTE (val
.bytepos
- 1) != '\n');
2870 /* There are two cases:
2871 1) we have displayed down to the bottom of the window
2872 2) we have scrolled lines below stop_vpos by scroll_amount */
2876 /* If last line is continued in middle of character,
2877 include the split character in the text considered on the frame */
2878 if (val
.hpos
< lmargin
)
2880 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
);
2881 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2884 /* If scrolling made blank lines at window bottom,
2885 redisplay to fill those lines */
2886 if (scroll_amount
< 0)
2888 /* Don't consider these lines for general-purpose scrolling.
2889 That will save time in the scrolling computation. */
2890 FRAME_SCROLL_BOTTOM_VPOS (f
) = xp
.vpos
;
2893 pos_byte
= xp
.bytepos
;
2895 val
.tab_offset
= xp
.tab_offset
;
2897 { /* Display from next line */
2898 vpos
= height
+ scroll_amount
;
2902 else if (xp
.contin
&& xp
.hpos
!= lmargin
)
2904 val
.hpos
= xp
.prevhpos
- width
+ lmargin
;
2905 val
.tab_offset
= xp
.tab_offset
+ bp
.prevhpos
- width
;
2906 DEC_BOTH (pos
, pos_byte
);
2909 blank_end_of_window
= 1;
2910 /* The following code is omitted because we maintain tab offset
2911 in val.tab_offset. */
2913 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2914 /* If we are starting display in mid-character, correct tab_offset
2915 to account for passing the line that that character starts in. */
2916 if (val
.hpos
< lmargin
)
2917 tab_offset
+= width
;
2919 val
.bytepos
= pos_byte
;
2920 while (vpos
< height
)
2922 val
= *display_text_line (w
, pos
, val
.bytepos
,
2923 top
+ vpos
++, val
.hpos
,
2924 val
.tab_offset
, val
.ovstring_chars_done
);
2925 /* The following code is omitted because we maintain tab
2926 offset in val.tab_offset. */
2928 tab_offset
+= width
;
2929 if (val
.vpos
) tab_offset
= 0;
2934 /* Here is a case where display_text_line sets cursor_vpos wrong.
2935 Make it be fixed up, below. */
2941 /* If bottom just moved off end of frame, change mode line percentage. */
2942 if (XFASTINT (w
->window_end_pos
) == 0
2944 w
->update_mode_line
= Qt
;
2946 /* Attempt to adjust end-of-text positions to new bottom line */
2949 delta
= height
- xp
.vpos
;
2951 || (delta
> 0 && xp
.bufpos
<= ZV
)
2952 || (delta
== 0 && xp
.hpos
))
2954 val
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), delta
, w
);
2955 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2956 XSETFASTINT (w
->window_end_vpos
,
2957 XFASTINT (w
->window_end_vpos
) + val
.vpos
);
2961 w
->window_end_valid
= Qnil
;
2963 /* If point was not in a line that was displayed, find it */
2964 if (cursor_vpos
< 0)
2967 val
= *compute_motion (start
, 0, lmargin
, 0, PT
,
2968 /* Don't care for VPOS... */
2969 1 << (BITS_PER_SHORT
- 1),
2971 1 << (BITS_PER_SHORT
- 1),
2973 pos_tab_offset (w
, start
, start_byte
),
2975 /* Admit failure if point is off frame now */
2976 if (val
.vpos
>= height
)
2978 for (vpos
= 0; vpos
< height
; vpos
++)
2979 cancel_line (vpos
+ top
, f
);
2982 cursor_vpos
= val
.vpos
+ top
;
2983 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, val
.hpos
, width
);
2986 FRAME_CURSOR_X (f
) = cursor_hpos
;
2987 FRAME_CURSOR_Y (f
) = cursor_vpos
;
2991 val
= *compute_motion (start
, 0, lmargin
, 0, ZV
,
2992 height
, - (1 << (BITS_PER_SHORT
- 1)),
2994 pos_tab_offset (w
, start
, start_byte
),
2996 if (val
.vpos
!= XFASTINT (w
->window_end_vpos
))
2998 if (XFASTINT (w
->window_end_pos
)
3006 /* Copy LEN glyphs starting address FROM to the rope TO.
3007 But don't actually copy the parts that would come in before S.
3008 Value is TO, advanced past the copied data.
3009 F is the frame we are displaying in. */
3012 copy_part_of_rope (f
, to
, s
, from
, len
, face
)
3014 register GLYPH
*to
; /* Copy to here. */
3015 register GLYPH
*s
; /* Starting point. */
3016 Lisp_Object
*from
; /* Data to copy. */
3018 int face
; /* Face to apply to glyphs which don't specify one. */
3021 register Lisp_Object
*fp
= from
;
3022 /* These cache the results of the last call to compute_glyph_face. */
3024 int last_merged
= 0;
3027 if (! FRAME_TERMCAP_P (f
))
3030 GLYPH glyph
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3032 unsigned int c
= FAST_GLYPH_CHAR (glyph
);
3035 /* For an invalid character code, use space. */
3038 if (FAST_GLYPH_FACE (glyph
) == 0)
3039 /* If GLYPH has no face code, use FACE. */
3041 else if (FAST_GLYPH_FACE (glyph
) == last_code
)
3042 /* If it's same as previous glyph, use same result. */
3043 facecode
= last_merged
;
3046 /* Merge this glyph's face and remember the result. */
3047 last_code
= FAST_GLYPH_FACE (glyph
);
3048 last_merged
= facecode
= compute_glyph_face (f
, last_code
, face
);
3052 *to
= FAST_MAKE_GLYPH (c
, facecode
);
3060 if (to
>= s
) *to
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3067 /* Correct a glyph by replacing its specified user-level face code
3068 with a displayable computed face code. */
3071 fix_glyph (f
, glyph
, cface
)
3077 if (! FRAME_TERMCAP_P (f
))
3079 if (FAST_GLYPH_FACE (glyph
) != 0)
3080 cface
= compute_glyph_face (f
, FAST_GLYPH_FACE (glyph
), cface
);
3081 glyph
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), cface
);
3087 /* Return the column of position POS / POS_BYTE in window W's buffer.
3088 When used on the character at the beginning of a line,
3089 starting at column 0, this says how much to subtract from
3090 the column position of any character in the line
3091 to get its horizontal position on the screen. */
3094 pos_tab_offset (w
, pos
, pos_byte
)
3096 register int pos
, pos_byte
;
3099 int opoint_byte
= PT_BYTE
;
3101 int width
= window_internal_width (w
) - 1;
3104 return MINI_WINDOW_P (w
) ? -minibuf_prompt_width
: 0;
3106 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3109 TEMP_SET_PT_BOTH (pos
, pos_byte
);
3110 col
= current_column ();
3111 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
3116 /* Display one line of window W, starting at char position START in W's buffer.
3117 START_BYTE is the corresponding byte position.
3119 Display starting at horizontal position HPOS, expressed relative to
3120 W's left edge. In situations where the text at START shouldn't
3121 start at the left margin (i.e. when the window is hscrolled, or
3122 we're continuing a line which left off in the midst of a
3123 multi-column character), HPOS should be negative; we throw away
3124 characters up 'til hpos = 0. So, HPOS must take hscrolling into
3127 TABOFFSET is an offset for ostensible hpos, used in tab stop calculations.
3129 OVSTR_DONE is the number of chars of overlay before/after strings
3130 at this position which have already been processed.
3132 Display on position VPOS on the frame. It is origin 0, relative to
3133 the top of the frame, not W.
3135 Returns a STRUCT POSITION giving character to start next line with
3136 and where to display it, including a zero or negative hpos.
3137 The vpos field is not really a vpos; it is 1 unless the line is continued */
3139 struct position val_display_text_line
;
3141 static struct position
*
3142 display_text_line (w
, start
, start_byte
, vpos
, hpos
, taboffset
, ovstr_done
)
3150 register int pos
= start
;
3151 int pos_byte
= start_byte
;
3154 int pause
, limit_byte
;
3155 register unsigned char *p
;
3157 register GLYPH
*leftmargin
;
3158 register GLYPH
*p1prev
;
3159 register GLYPH
*p1start
;
3160 GLYPH
*p1_wide_column_end
= (GLYPH
*) 0;
3161 int prevpos
, prevpos_byte
;
3163 FRAME_PTR f
= XFRAME (w
->frame
);
3164 int tab_width
= XINT (current_buffer
->tab_width
);
3165 int ctl_arrow
= !NILP (current_buffer
->ctl_arrow
);
3166 int width
= window_internal_width (w
) - 1;
3167 struct position val
;
3168 int lastpos
, lastpos_byte
;
3170 int last_invis_skip
= 0;
3171 Lisp_Object last_invis_prop
;
3172 int hscroll
= XINT (w
->hscroll
);
3173 int truncate
= (hscroll
3174 || (truncate_partial_width_windows
3175 && !WINDOW_FULL_WIDTH_P (w
))
3176 || !NILP (current_buffer
->truncate_lines
));
3178 /* 1 if this buffer has a region to highlight. */
3179 int highlight_region
3180 = (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
)
3181 && XMARKER (current_buffer
->mark
)->buffer
!= 0);
3182 int region_beg
, region_end
;
3184 int selective
= (INTEGERP (current_buffer
->selective_display
)
3185 ? XINT (current_buffer
->selective_display
)
3186 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
3187 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
3188 register struct Lisp_Char_Table
*dp
= window_display_table (w
);
3190 Lisp_Object default_invis_vector
[3];
3191 /* Number of characters of ellipsis to display after an invisible line
3192 if it calls for an ellipsis.
3193 Note that this value can be nonzero regardless of whether
3194 selective display is enabled--you must check that separately. */
3196 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3197 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->size
3198 : !NILP (current_buffer
->selective_display_ellipses
) ? 3 : 0);
3199 /* This is the sequence of Lisp objects to display
3200 when there are invisible lines. */
3201 Lisp_Object
*invis_vector_contents
3202 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3203 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->contents
3204 : default_invis_vector
);
3206 GLYPH truncator
= (dp
== 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp
))
3207 || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp
)))
3208 ? '$' : XINT (DISP_TRUNC_GLYPH (dp
)));
3209 GLYPH continuer
= (dp
== 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp
))
3210 || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp
)))
3211 ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp
)));
3213 /* If 1, we must handle multibyte characters. */
3214 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
3215 /* Length of multibyte form of each character. */
3217 /* Glyphs generated should be set this bit mask if text must be
3218 displayed from right to left. */
3219 GLYPH rev_dir_bit
= (NILP (current_buffer
->direction_reversed
)
3220 ? 0 : GLYPH_MASK_REV_DIR
);
3222 /* The next buffer location at which the face should change, due
3223 to overlays or text property changes. */
3224 int next_face_change
;
3226 /* The next location where the `invisible' property changes, or an
3227 overlay starts or ends. */
3230 /* The face we're currently using. */
3231 int current_face
= 0;
3234 XSETFASTINT (default_invis_vector
[2], '.');
3235 default_invis_vector
[0] = default_invis_vector
[1] = default_invis_vector
[2];
3237 get_display_line (f
, vpos
, WINDOW_LEFT_MARGIN (w
));
3238 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
3240 /* Show where to highlight the region. */
3241 if (highlight_region
3242 /* Maybe highlight only in selected window. */
3243 && (highlight_nonselected_windows
3244 || w
== XWINDOW (selected_window
)
3245 || (MINI_WINDOW_P (XWINDOW (selected_window
))
3246 && w
== XWINDOW (Vminibuf_scroll_window
))))
3248 region_beg
= marker_position (current_buffer
->mark
);
3249 if (PT
< region_beg
)
3251 region_end
= region_beg
;
3256 w
->region_showing
= Qt
;
3260 region_beg
= region_end
= -1;
3261 w
->region_showing
= Qnil
;
3264 if (MINI_WINDOW_P (w
)
3266 && vpos
== XFASTINT (w
->top
))
3268 if (! NILP (minibuf_prompt
))
3270 int old_width
= minibuf_prompt_width
;
3272 minibuf_prompt_width
3273 = (display_string (w
, vpos
, XSTRING (minibuf_prompt
)->data
,
3274 STRING_BYTES (XSTRING (minibuf_prompt
)),
3275 hpos
+ WINDOW_LEFT_MARGIN (w
),
3276 /* Display a space if we truncate. */
3279 /* Truncate the prompt a little before the
3280 margin, so user input can at least start
3281 on the first line. */
3282 (XFASTINT (w
->width
) > 10
3283 ? XFASTINT (w
->width
) - 4 : -1),
3284 STRING_MULTIBYTE (minibuf_prompt
))
3285 - hpos
- WINDOW_LEFT_MARGIN (w
));
3286 hpos
+= minibuf_prompt_width
;
3287 taboffset
-= minibuf_prompt_width
- old_width
;
3290 minibuf_prompt_width
= 0;
3293 /* If we're hscrolled at all, use compute_motion to skip over any
3294 text off the left edge of the window. compute_motion may know
3295 tricks to do this faster than we can. */
3298 struct position
*left_edge
3299 = compute_motion (pos
, vpos
, hpos
, 0,
3301 width
, hscroll
, taboffset
, w
);
3303 /* Retrieve the buffer position and column provided by
3304 compute_motion. We can't assume that the column will be
3305 zero, because you may have multi-column characters crossing
3308 compute_motion may have moved us past the screen position we
3309 requested, if we hit a multi-column character, or the end of
3310 the line. If so, back up. */
3311 if (left_edge
->vpos
> vpos
3312 || left_edge
->hpos
> 0)
3314 pos
= left_edge
->bufpos
;
3315 pos_byte
= left_edge
->bytepos
;
3316 DEC_BOTH (pos
, pos_byte
);
3317 hpos
= left_edge
->prevhpos
;
3321 pos
= left_edge
->bufpos
;
3322 pos_byte
= left_edge
->bytepos
;
3323 hpos
= left_edge
->hpos
;
3327 hpos
+= WINDOW_LEFT_MARGIN (w
);
3329 desired_glyphs
->bufp
[vpos
] = start
;
3330 p1
= desired_glyphs
->glyphs
[vpos
] + hpos
;
3332 charstart
= desired_glyphs
->charstarts
[vpos
] + hpos
;
3333 /* In case we don't ever write anything into it... */
3334 desired_glyphs
->charstarts
[vpos
][WINDOW_LEFT_MARGIN (w
)] = -1;
3335 leftmargin
= desired_glyphs
->glyphs
[vpos
] + WINDOW_LEFT_MARGIN (w
);
3336 endp
= leftmargin
+ width
;
3338 /* Arrange the overlays nicely for our purposes. Usually, we call
3339 display_text_line on only one line at a time, in which case this
3340 can't really hurt too much, or we call it on lines which appear
3341 one after another in the buffer, in which case all calls to
3342 recenter_overlay_lists but the first will be pretty cheap. */
3343 recenter_overlay_lists (current_buffer
, pos
);
3345 /* Loop generating characters.
3346 Stop at end of buffer, before newline,
3347 if reach or pass continuation column,
3348 or at face change. */
3350 limit_byte
= pos_byte
;
3351 next_face_change
= pos
;
3352 next_boundary
= pos
;
3355 prevpos_byte
= pos_byte
;
3357 /* If the window is hscrolled and point is in the invisible part of the
3358 current line beyond the left margin we can record the cursor location
3360 if (hscroll
&& start
<= PT
&& PT
< pos
&& cursor_vpos
< 0)
3363 cursor_hpos
= p1
- leftmargin
;
3372 while (pos
== next_boundary
)
3374 Lisp_Object position
, limit
, prop
, ww
;
3376 /* Display the overlay strings here, unless we're at ZV
3377 and have already displayed the appropriate strings
3378 on an earlier line. */
3379 if (pos
< ZV
|| !zv_strings_seen
++)
3382 unsigned char *ovstr
;
3383 ovlen
= overlay_strings (pos
, w
, &ovstr
);
3387 /* Skip the ones we did in a previous line. */
3388 ovstr
+= ovstr_done
;
3389 ovlen
-= ovstr_done
;
3398 c
= STRING_CHAR_AND_LENGTH (ovstr
, ovlen
, len
);
3399 ovstr
+= len
, ovlen
-= len
, ovstr_done
+= len
;
3400 charset
= CHAR_CHARSET (c
);
3401 cols
= (charset
== CHARSET_COMPOSITION
3402 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3403 : CHARSET_WIDTH (charset
));
3407 c
= *ovstr
++, ovlen
--, ovstr_done
++;
3410 g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3413 if (p1
>= leftmargin
&& p1
< endp
)
3414 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3418 /* If we did all the overlay strings
3419 and we have room for text, clear ovstr_done
3420 just for neatness' sake. */
3421 if (ovlen
== 0 && p1
< endp
)
3426 /* Did we reach point? Record the cursor location. */
3427 if (pos
== PT
&& cursor_vpos
< 0)
3430 cursor_hpos
= p1
- leftmargin
;
3436 XSETFASTINT (position
, pos
);
3437 limit
= Fnext_overlay_change (position
);
3438 #ifdef USE_TEXT_PROPERTIES
3439 /* This is just an estimate to give reasonable
3440 performance; nothing should go wrong if it is too small. */
3441 if (XFASTINT (limit
) > pos
+ 50)
3443 int limitpos
= pos
+ 50;
3444 XSETFASTINT (limit
, limitpos
);
3446 limit
= Fnext_single_property_change (position
, Qinvisible
,
3447 Fcurrent_buffer (), limit
);
3449 next_boundary
= XFASTINT (limit
);
3450 /* if the `invisible' property is set, we can skip to
3451 the next property change. */
3453 prop
= Fget_char_property (position
, Qinvisible
, ww
);
3454 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
3456 if (pos
< PT
&& next_boundary
>= PT
)
3459 cursor_hpos
= p1
- leftmargin
;
3461 pos
= next_boundary
;
3462 pos_byte
= CHAR_TO_BYTE (pos
);
3463 last_invis_skip
= pos
;
3464 last_invis_prop
= prop
;
3468 /* Did we reach point? Record the cursor location. */
3469 if (pos
== PT
&& cursor_vpos
< 0)
3472 cursor_hpos
= p1
- leftmargin
;
3475 /* Did we hit the end of the visible region of the buffer?
3479 /* Update charstarts for the end of this line. */
3480 /* Do nothing if off the left edge or at the right edge. */
3481 if (p1
>= leftmargin
&& p1
+ 1 != endp
)
3483 int *p2x
= &charstart
[(p1
< leftmargin
3491 /* Figure out where (if at all) the
3492 redisplay_end_trigger-hook should run. */
3493 if (MARKERP (w
->redisplay_end_trigger
)
3494 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
3495 e_t_h
= marker_position (w
->redisplay_end_trigger
);
3496 else if (INTEGERP (w
->redisplay_end_trigger
))
3497 e_t_h
= XINT (w
->redisplay_end_trigger
);
3501 /* If we've gone past the place to run a hook,
3503 if (pos
>= e_t_h
&& e_t_h
!= ZV
)
3505 Lisp_Object args
[3];
3507 args
[0] = Qredisplay_end_trigger_functions
;
3508 XSETWINDOW (args
[1], w
);
3509 XSETINT (args
[2], e_t_h
);
3511 /* Since we are *trying* to run these functions,
3512 don't try to run them again, even if they get an error. */
3513 w
->redisplay_end_trigger
= Qnil
;
3514 Frun_hook_with_args (3, args
);
3517 /* Notice if it changed the face of this character. */
3518 next_face_change
= pos
;
3522 /* Did we hit a face change? Figure out what face we should
3523 use now. We also hit this the first time through the
3524 loop, to see what face we should start with. */
3525 if (pos
>= next_face_change
3526 && (FRAME_WINDOW_P (f
) || FRAME_MSDOS_P (f
)))
3528 int limit
= pos
+ 50;
3530 current_face
= compute_char_face (f
, w
, pos
,
3531 region_beg
, region_end
,
3532 &next_face_change
, limit
, 0);
3536 /* Compute the next place we need to stop
3537 and do something special; set PAUSE. */
3541 if (pos
< next_boundary
&& next_boundary
< pause
)
3542 pause
= next_boundary
;
3543 if (pos
< next_face_change
&& next_face_change
< pause
)
3544 pause
= next_face_change
;
3549 /* Wouldn't you hate to read the next line to someone over
3551 if (pos
< PT
&& PT
< pause
)
3553 if (pos
< GPT
&& GPT
< pause
)
3556 /* LIMIT_BYTE is not the same place in the buffer as PAUSE.
3557 It is a limit on valid characters.
3558 We use it to bound STRING_CHAR_AND_LENGTH. */
3559 limit_byte
= ZV_BYTE
;
3560 if (pos
< GPT
&& GPT_BYTE
< limit_byte
)
3561 limit_byte
= GPT_BYTE
;
3564 int temp
= CHAR_TO_BYTE (pos
);
3565 p
= BYTE_POS_ADDR (temp
);
3573 p1_wide_column_end
= (GLYPH
*) 0;
3576 c
= STRING_CHAR_AND_LENGTH (p
, limit_byte
- pos_byte
, len
), p
+= len
;
3579 /* Let a display table override all standard display methods. */
3580 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
3582 p1
= copy_part_of_rope (f
, p1
, leftmargin
,
3583 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
3584 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
3585 current_face
, rev_dir_bit
);
3587 else if (c
>= 040 && c
< 0177)
3589 if (p1
>= leftmargin
)
3590 *p1
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3596 /* Same as p1prev, but after the invis_vector_contents text
3597 (if we have that on this line). */
3598 GLYPH
*p1prev_modified
;
3602 if (last_invis_skip
== pos
3603 && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop
))
3607 && indented_beyond_p (pos
+ 1, pos_byte
+ 1, selective
))
3609 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3612 INC_BOTH (pos
, pos_byte
);
3613 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3614 pos
= PT
, pos_byte
= PT_BYTE
;
3615 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3620 SET_PT_BOTH (opoint
, opoint_byte
);
3622 if (invis
&& selective_rlen
> 0 && p1
>= leftmargin
)
3627 cs
= charstart
+ (p1
- p1start
);
3630 p1
+= selective_rlen
;
3631 if (p1
- leftmargin
> width
)
3634 #if 0 /* This needs more work; charstarts needs to record
3635 both whether a position ho;ds an ellipsis character
3636 and what buffer position it corresponds to. */
3637 csend
= charstart
+ (p1
- p1start
);
3640 /* The idea is to use p1prev_modified instead of p1prev
3641 in the loop below over p2x. */
3642 p1prev_modified
= p1
;
3645 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3646 (p1
- p1prev
), current_face
, rev_dir_bit
);
3649 /* Update charstarts for the newline that ended this line. */
3650 /* Do nothing here for a char that's entirely off the left edge
3651 or if it starts at the right edge. */
3652 if (p1
>= leftmargin
&& p1prev
!= endp
)
3654 /* Store the newline's position into charstarts
3655 for the column where the newline starts.
3656 Store -1 for the rest of the glyphs it occupies. */
3657 int *p2x
= &charstart
[(p1prev
< leftmargin
3658 ? leftmargin
: p1prev
)
3660 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3667 /* Draw the face of the newline character as extending all the
3668 way to the end of the frame line. */
3671 if (p1
< leftmargin
)
3674 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3684 if (p1
>= leftmargin
&& p1
< endp
)
3685 *p1
= MAKE_GLYPH (f
, ' ', current_face
) | rev_dir_bit
;
3688 while ((p1
- leftmargin
+ taboffset
+ hscroll
- (hscroll
> 0))
3691 else if (c
== Ctl ('M') && selective
== -1)
3693 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3694 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3695 pos
= PT
, pos_byte
= PT_BYTE
;
3696 SET_PT_BOTH (opoint
, opoint_byte
);
3698 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3700 if (selective_rlen
> 0)
3702 p1
+= selective_rlen
;
3703 if (p1
- leftmargin
> width
)
3705 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3706 (p1
- p1prev
), current_face
, rev_dir_bit
);
3709 /* Draw the face of the newline character as extending all the
3710 way to the end of the frame line. */
3713 if (p1
< leftmargin
)
3716 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3720 /* Update charstarts for the ^M that ended this line. */
3721 /* Do nothing here for a char that's entirely off the left edge
3722 or if it starts at the right edge. */
3723 if (p1
>= leftmargin
&& p1prev
!= endp
)
3725 /* Store the newline's position into charstarts
3726 for the column where the newline starts.
3727 Store -1 for the rest of the glyphs it occupies. */
3728 int *p2x
= &charstart
[(p1prev
< leftmargin
3729 ? leftmargin
: p1prev
)
3731 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3739 else if (c
< 0200 && ctl_arrow
)
3741 if (p1
>= leftmargin
)
3743 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
3744 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
3745 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
3749 if (p1
>= leftmargin
&& p1
< endp
)
3750 *p1
= MAKE_GLYPH (f
, c
^ 0100, current_face
) | rev_dir_bit
;
3755 /* C is a multibyte character or a character to be displayed
3757 int remaining_bytes
= len
;
3761 /* C is a multibyte character. */
3762 int charset
= CHAR_CHARSET (c
);
3763 int columns
= (charset
== CHARSET_COMPOSITION
3764 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3765 : CHARSET_WIDTH (charset
));
3766 GLYPH g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3770 if (p1
>= leftmargin
&& p1
< endp
)
3771 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3774 p1_wide_column_end
= p1
;
3775 remaining_bytes
-= CHARSET_BYTES (charset
);
3778 while (remaining_bytes
> 0)
3780 c
= *(p
- remaining_bytes
--);
3782 if (p1
>= leftmargin
&& p1
< endp
)
3785 (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
3786 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
3787 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
3791 if (p1
>= leftmargin
&& p1
< endp
)
3792 *p1
= (MAKE_GLYPH (f
, (c
>> 6) + '0', current_face
)
3795 if (p1
>= leftmargin
&& p1
< endp
)
3796 *p1
= (MAKE_GLYPH (f
, (7 & (c
>> 3)) + '0', current_face
)
3799 if (p1
>= leftmargin
&& p1
< endp
)
3800 *p1
= (MAKE_GLYPH (f
, (7 & c
) + '0', current_face
)
3807 prevpos_byte
= pos_byte
;
3811 /* Update charstarts for the character just output. */
3813 /* Do nothing here for a char that's entirely off the left edge. */
3814 if (p1
>= leftmargin
)
3816 /* Store the char's position into charstarts
3817 for the first glyph occupied by this char.
3818 Store -1 for the rest of the glyphs it occupies. */
3821 int *p2x
= &charstart
[(p1prev
< leftmargin
3822 ? leftmargin
: p1prev
)
3824 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3834 val
.hpos
= - XINT (w
->hscroll
);
3841 lastpos_byte
= pos_byte
;
3843 /* Store 0 in this charstart line for the positions where
3844 there is no character. But do leave what was recorded
3845 for the character that ended the line. */
3846 /* Add 1 in the endtest to compensate for the fact that ENDP was
3847 made from WIDTH, which is 1 less than the window's actual
3849 i
= p1
- p1start
+ 1;
3850 if (p1
< leftmargin
)
3851 i
+= leftmargin
- p1
;
3852 for (; i
< endp
- p1start
+ 1; i
++)
3855 /* Handle continuation in middle of a character */
3856 /* by backing up over it */
3859 /* Don't back up if we never actually displayed any text.
3860 This occurs when the minibuffer prompt takes up the whole line. */
3863 /* Start the next line with that same character whose
3864 character code is C and the length of multi-byte form is
3867 pos_byte
= prevpos_byte
;
3869 if (p1_wide_column_end
< endp
)
3870 /* As ENDP is not in the middle of wide-column character,
3871 we can break the line at ENDP and start from the middle
3872 column in the next line. So, adjust VAL.HPOS to skip
3873 the columns output on this line. */
3874 val
.hpos
+= p1prev
- endp
;
3877 /* We displayed a wide-column character at around ENDP.
3878 Since we can't broke it in the middle, the whole
3879 character should be driven into the next line. */
3880 /* As the result, the actual columns occupied by the
3881 text on this line is less than WIDTH. VAL.TAB_OFFSET
3882 must be adjusted. */
3883 taboffset
= taboffset
+ (p1prev
- endp
);
3884 /* Let's fill unused columns with TRUNCATOR or CONTINUER. */
3886 GLYPH g
= fix_glyph (f
, truncate
? truncator
: continuer
, 0);
3887 while (p1prev
< endp
)
3890 /* If POINT is at POS, cursor should not on this line. */
3892 lastpos_byte
= pos_byte
;
3898 /* Keep in this line everything up to the continuation column. */
3902 /* Finish deciding which character to start the next line on,
3903 and what hpos to start it at.
3904 Also set `lastpos' to the last position which counts as "on this line"
3905 for cursor-positioning. */
3909 if (FETCH_BYTE (pos_byte
) == '\n')
3911 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3913 /* If stopped due to a newline, start next line after it */
3914 SET_PT_BOTH (pos
+ 1, pos_byte
+ 1);
3917 /* Check again for hidden lines, in case the newline occurred exactly
3918 at the right margin. */
3919 while (PT
< ZV
&& selective
> 0
3920 && indented_beyond_p (PT
, PT_BYTE
, selective
))
3921 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3923 pos
= PT
, pos_byte
= PT_BYTE
;
3924 SET_PT_BOTH (opoint
, opoint_byte
);
3927 /* Stopped due to right margin of window */
3931 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3933 SET_PT_BOTH (pos
, pos_byte
);
3934 *p1
++ = fix_glyph (f
, truncator
, 0);
3935 /* Truncating => start next line after next newline,
3936 and point is on this line if it is before the newline,
3937 and skip none of first char of next line */
3939 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3940 while (PT
< ZV
&& selective
> 0
3941 && indented_beyond_p (PT
, PT_BYTE
, selective
));
3942 pos
= PT
, pos_byte
= PT_BYTE
;
3943 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
3944 SET_PT_BOTH (opoint
, opoint_byte
);
3946 lastpos
= pos
- (FETCH_BYTE (pos_byte
- 1) == '\n');
3947 lastpos_byte
= CHAR_TO_BYTE (lastpos
);
3952 *p1
++ = fix_glyph (f
, continuer
, 0);
3954 DEC_BOTH (lastpos
, lastpos_byte
);
3955 val
.tab_offset
= taboffset
+ width
;
3962 /* If point is at eol or in invisible text at eol,
3963 record its frame location now. */
3965 if (start
<= PT
&& PT
<= lastpos
&& cursor_vpos
< 0)
3968 cursor_hpos
= p1
- leftmargin
;
3971 if (cursor_vpos
== vpos
)
3973 if (cursor_hpos
< 0) cursor_hpos
= 0;
3974 if (cursor_hpos
> width
) cursor_hpos
= width
;
3975 cursor_hpos
+= WINDOW_LEFT_MARGIN (w
);
3976 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
3978 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (f
)
3979 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
)))
3981 FRAME_CURSOR_Y (f
) = cursor_vpos
;
3982 FRAME_CURSOR_X (f
) = cursor_hpos
;
3985 if (w
== XWINDOW (selected_window
))
3987 /* Line is not continued and did not start
3988 in middle of character */
3989 if ((hpos
- WINDOW_LEFT_MARGIN (w
)
3990 == (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
3993 this_line_bufpos
= start
;
3994 this_line_buffer
= current_buffer
;
3995 this_line_vpos
= cursor_vpos
;
3996 this_line_start_hpos
= hpos
- WINDOW_LEFT_MARGIN (w
);
3997 this_line_endpos
= Z
- lastpos
;
4000 this_line_bufpos
= 0;
4005 /* If hscroll and line not empty, insert truncation-at-left marker */
4006 if (hscroll
&& lastpos
!= start
)
4008 GLYPH g
= fix_glyph (f
, truncator
, 0);
4010 if (p1
<= leftmargin
)
4011 p1
= leftmargin
+ 1;
4012 else /* MULE: it may be a wide-column character */
4014 p1prev
= leftmargin
+ 1;
4015 while (p1prev
< p1
&& *p1prev
& GLYPH_MASK_PADDING
)
4020 if (!WINDOW_RIGHTMOST_P (w
))
4023 if (p1
< leftmargin
) p1
= leftmargin
;
4024 while (p1
< endp
) *p1
++ = SPACEGLYPH
;
4026 /* Don't draw vertical bars if we're using scroll bars. They're
4027 covered up by the scroll bars, and it's distracting to see
4028 them when the scroll bar windows are flickering around to be
4030 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
4033 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
4036 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
4037 *p1
++ = (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
4038 ? XINT (DISP_BORDER_GLYPH (dp
))
4041 desired_glyphs
->used
[vpos
] = max (desired_glyphs
->used
[vpos
],
4042 p1
- desired_glyphs
->glyphs
[vpos
]);
4043 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
4045 /* If the start of this line is the overlay arrow-position,
4046 then put the arrow string into the display-line. */
4048 if (MARKERP (Voverlay_arrow_position
)
4049 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
4050 && start
== marker_position (Voverlay_arrow_position
)
4051 && STRINGP (Voverlay_arrow_string
)
4052 && ! overlay_arrow_seen
)
4055 int len
= XSTRING (Voverlay_arrow_string
)->size
;
4061 /* If the arrow string has text props, obey them when displaying. */
4062 for (i
= 0, i_byte
= 0; i
< len
; )
4065 Lisp_Object face
, ilisp
;
4069 if (STRING_MULTIBYTE (Voverlay_arrow_string
))
4070 FETCH_STRING_CHAR_ADVANCE (c
, Voverlay_arrow_string
, i
, i_byte
);
4072 c
= XSTRING (Voverlay_arrow_string
)->data
[i
++];
4074 XSETFASTINT (ilisp
, i
);
4076 if (FRAME_WINDOW_P (f
))
4078 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
4079 newface
= compute_glyph_face_1 (f
, face
, 0);
4080 c
= FAST_MAKE_GLYPH (c
, newface
);
4082 #endif /* HAVE_FACES */
4083 leftmargin
[idx
] = c
;
4086 /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */
4087 arrow_end
= (leftmargin
- desired_glyphs
->glyphs
[vpos
]) + len
;
4088 if (desired_glyphs
->used
[vpos
] < arrow_end
)
4089 desired_glyphs
->used
[vpos
] = arrow_end
;
4091 overlay_arrow_seen
= 1;
4095 val
.bytepos
= pos_byte
;
4096 val
.ovstring_chars_done
= ovstr_done
;
4097 val_display_text_line
= val
;
4098 return &val_display_text_line
;
4101 /* Redisplay the menu bar in the frame for window W. */
4104 display_menu_bar (w
)
4107 Lisp_Object items
, tail
;
4108 register int vpos
= 0;
4109 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4110 int maxendcol
= FRAME_WIDTH (f
);
4115 if (!NILP (Vwindow_system
))
4119 #ifdef USE_X_TOOLKIT
4122 #endif /* USE_X_TOOLKIT */
4124 get_display_line (f
, vpos
, 0);
4126 items
= FRAME_MENU_BAR_ITEMS (f
);
4127 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
4129 Lisp_Object pos
, string
;
4130 string
= XVECTOR (items
)->contents
[i
+ 1];
4134 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], hpos
);
4136 if (hpos
< maxendcol
)
4137 hpos
= display_string (w
, vpos
,
4138 XSTRING (string
)->data
,
4139 STRING_BYTES (XSTRING (string
)),
4140 hpos
, 0, 0, hpos
, maxendcol
,
4141 STRING_MULTIBYTE (string
));
4142 /* Put a space between items. */
4143 if (hpos
< maxendcol
)
4145 int hpos1
= hpos
+ 1;
4146 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0,
4147 min (hpos1
, maxendcol
), maxendcol
, 0);
4151 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4152 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4154 /* Fill out the line with spaces. */
4155 if (maxendcol
> hpos
)
4156 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0, maxendcol
, maxendcol
, 0);
4158 /* Clear the rest of the lines allocated to the menu bar. */
4160 while (vpos
< FRAME_MENU_BAR_LINES (f
))
4161 get_display_line (f
, vpos
++, 0);
4164 /* Display the mode line for window w */
4167 display_mode_line (w
)
4170 register int vpos
= XFASTINT (w
->height
) + XFASTINT (w
->top
) - 1;
4171 register int left
= WINDOW_LEFT_MARGIN (w
);
4172 register int right
= WINDOW_RIGHT_MARGIN (w
);
4173 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4175 line_number_displayed
= 0;
4176 w
->column_number_displayed
= Qnil
;
4178 get_display_line (f
, vpos
, left
);
4180 /* Temporarily make frame F's kboard the current kboard
4181 so that kboard-local variables in the mode_line_format
4182 will get the right values. */
4183 push_frame_kboard (f
);
4185 display_mode_element (w
, vpos
, left
, 0, right
, right
,
4186 current_buffer
->mode_line_format
);
4188 pop_frame_kboard ();
4190 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4192 /* Put the mode line in inverse video.
4193 Use faces if possible, since that lets us handle
4194 partial-width windows and avoid inverting the scroll bar columns. */
4196 if (! FRAME_TERMCAP_P (f
) && mode_line_inverse_video
)
4198 /* For a partial width window, explicitly set face of each glyph. */
4200 unsigned int padding
;
4201 GLYPH
*ptr
= FRAME_DESIRED_GLYPHS (f
)->glyphs
[vpos
];
4202 for (i
= left
; i
< right
; ++i
)
4204 padding
= ptr
[i
] & GLYPH_MASK_PADDING
;
4205 ptr
[i
] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr
[i
]), 1) | padding
;
4211 /* Make the mode line inverse video if the entire line
4212 is made of mode lines.
4213 I.e. if this window is full width,
4214 or if it is the child of a full width window
4215 (which implies that that window is split side-by-side
4216 and the rest of this line is mode lines of the sibling windows). */
4217 if (WINDOW_FULL_WIDTH_P (w
)
4218 || WINDOW_FULL_WIDTH_P (XWINDOW (w
->parent
)))
4219 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4222 /* Contribute ELT to the mode line for window W.
4223 How it translates into text depends on its data type.
4225 VPOS is the position of the mode line being displayed.
4227 HPOS is the position (absolute on frame) where this element's text
4228 should start. The output is truncated automatically at the right
4231 DEPTH is the depth in recursion. It is used to prevent
4232 infinite recursion here.
4234 MINENDCOL is the hpos before which the element may not end.
4235 The element is padded at the right with spaces if nec
4236 to reach this column.
4238 MAXENDCOL is the hpos past which this element may not extend.
4239 If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority.
4240 (This is necessary to make nested padding and truncation work.)
4242 Returns the hpos of the end of the text generated by ELT.
4243 The next element will receive that value as its HPOS arg,
4244 so as to concatenate the elements. */
4247 display_mode_element (w
, vpos
, hpos
, depth
, minendcol
, maxendcol
, elt
)
4249 register int vpos
, hpos
;
4252 register int maxendcol
;
4253 register Lisp_Object elt
;
4261 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
4265 /* A string: output it and check for %-constructs within it. */
4266 register unsigned char c
;
4267 register unsigned char *this = XSTRING (elt
)->data
;
4269 while (hpos
< maxendcol
&& *this)
4271 unsigned char *last
= this;
4272 while ((c
= *this++) != '\0' && c
!= '%')
4274 if (this - 1 != last
)
4276 register int lim
= --this - last
+ hpos
;
4277 if (frame_title_ptr
)
4278 hpos
= store_frame_title (last
, hpos
, min (lim
, maxendcol
));
4280 hpos
= display_string (w
, vpos
, last
, -1, hpos
, 0, 1,
4281 hpos
, min (lim
, maxendcol
),
4282 STRING_MULTIBYTE (elt
));
4286 register int minendcol
;
4287 register int spec_width
= 0;
4289 /* We can't allow -ve args due to the "%-" construct */
4290 /* Argument specifies minwidth but not maxwidth
4291 (maxwidth can be specified by
4292 (<negative-number> . <stuff>) mode-line elements) */
4294 while ((c
= *this++) >= '0' && c
<= '9')
4296 spec_width
= spec_width
* 10 + (c
- '0');
4299 minendcol
= hpos
+ spec_width
;
4300 if (minendcol
> maxendcol
)
4302 spec_width
= maxendcol
- hpos
;
4303 minendcol
= maxendcol
;
4307 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4308 spec_width
, maxendcol
,
4309 Vglobal_mode_string
);
4312 char *spec
= decode_mode_spec (w
, c
, spec_width
,
4314 if (frame_title_ptr
)
4315 hpos
= store_frame_title (spec
, minendcol
, maxendcol
);
4317 hpos
= display_string (w
, vpos
, spec
, -1,
4319 minendcol
, maxendcol
, -1);
4327 /* A symbol: process the value of the symbol recursively
4328 as if it appeared here directly. Avoid error if symbol void.
4329 Special case: if value of symbol is a string, output the string
4332 register Lisp_Object tem
;
4333 tem
= Fboundp (elt
);
4336 tem
= Fsymbol_value (elt
);
4337 /* If value is a string, output that string literally:
4338 don't check for % within it. */
4341 if (frame_title_ptr
)
4342 hpos
= store_frame_title (XSTRING (tem
)->data
,
4343 minendcol
, maxendcol
);
4345 hpos
= display_string (w
, vpos
, XSTRING (tem
)->data
,
4346 STRING_BYTES (XSTRING (tem
)),
4347 hpos
, 0, 1, minendcol
, maxendcol
,
4348 STRING_MULTIBYTE (tem
));
4350 /* Give up right away for nil or t. */
4351 else if (!EQ (tem
, elt
))
4352 { elt
= tem
; goto tail_recurse
; }
4359 register Lisp_Object car
, tem
;
4361 /* A cons cell: three distinct cases.
4362 If first element is a string or a cons, process all the elements
4363 and effectively concatenate them.
4364 If first element is a negative number, truncate displaying cdr to
4365 at most that many characters. If positive, pad (with spaces)
4366 to at least that many characters.
4367 If first element is a symbol, process the cadr or caddr recursively
4368 according to whether the symbol's value is non-nil or nil. */
4369 car
= XCONS (elt
)->car
;
4372 tem
= Fboundp (car
);
4373 elt
= XCONS (elt
)->cdr
;
4376 /* elt is now the cdr, and we know it is a cons cell.
4377 Use its car if CAR has a non-nil value. */
4380 tem
= Fsymbol_value (car
);
4382 { elt
= XCONS (elt
)->car
; goto tail_recurse
; }
4384 /* Symbol's value is nil (or symbol is unbound)
4385 Get the cddr of the original list
4386 and if possible find the caddr and use that. */
4387 elt
= XCONS (elt
)->cdr
;
4390 else if (!CONSP (elt
))
4392 elt
= XCONS (elt
)->car
;
4395 else if (INTEGERP (car
))
4397 register int lim
= XINT (car
);
4398 elt
= XCONS (elt
)->cdr
;
4400 /* Negative int means reduce maximum width.
4401 DO NOT change MINENDCOL here!
4402 (20 -10 . foo) should truncate foo to 10 col
4403 and then pad to 20. */
4404 maxendcol
= min (maxendcol
, hpos
- lim
);
4407 /* Padding specified. Don't let it be more than
4410 if (lim
> maxendcol
)
4412 /* If that's more padding than already wanted, queue it.
4413 But don't reduce padding already specified even if
4414 that is beyond the current truncation point. */
4415 if (lim
> minendcol
)
4420 else if (STRINGP (car
) || CONSP (car
))
4422 register int limit
= 50;
4423 /* LIMIT is to protect against circular lists. */
4424 while (CONSP (elt
) && --limit
> 0
4425 && hpos
< maxendcol
)
4427 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4430 elt
= XCONS (elt
)->cdr
;
4438 if (frame_title_ptr
)
4439 hpos
= store_frame_title ("*invalid*", minendcol
, maxendcol
);
4441 hpos
= display_string (w
, vpos
, "*invalid*", -1, hpos
, 0, 1,
4442 minendcol
, maxendcol
, 0);
4446 if (minendcol
> hpos
)
4447 if (frame_title_ptr
)
4448 hpos
= store_frame_title ("", minendcol
, maxendcol
);
4450 hpos
= display_string (w
, vpos
, "", 0, hpos
,
4451 0, 1, minendcol
, maxendcol
, 0);
4455 /* Write a null-terminated, right justified decimal representation of
4456 the positive integer D to BUF using a minimal field width WIDTH. */
4459 pint2str (buf
, width
, d
)
4464 register char *p
= buf
;
4471 *p
++ = d
% 10 + '0';
4474 for (width
-= (int) (p
- buf
); width
> 0; --width
) *p
++ = ' ';
4484 /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF.
4485 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
4486 type of CODING_SYSTEM. Return updated pointer into BUF. */
4489 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
4490 Lisp_Object coding_system
;
4495 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
4497 val
= coding_system
;
4499 if (NILP (val
)) /* Not yet decided. */
4504 *buf
++ = eol_mnemonic_undecided
;
4505 /* Don't mention EOL conversion if it isn't decided. */
4509 Lisp_Object eolvalue
;
4511 eolvalue
= Fget (coding_system
, Qeol_type
);
4513 while (!NILP (val
) && SYMBOLP (val
))
4515 val
= Fget (val
, Qcoding_system
);
4516 if (NILP (eolvalue
))
4517 eolvalue
= Fget (val
, Qeol_type
);
4521 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
4525 /* The EOL conversion we are using. */
4527 /* The EOL conversion that is normal on this system. */
4529 if (NILP (eolvalue
)) /* Not yet decided. */
4530 eoltype
= eol_mnemonic_undecided
;
4531 else if (VECTORP (eolvalue
)) /* Not yet decided. */
4532 eoltype
= eol_mnemonic_undecided
;
4533 else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */
4534 eoltype
= (XFASTINT (eolvalue
) == 0
4536 : (XFASTINT (eolvalue
) == 1
4537 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
4539 /* Mention the EOL conversion if it is not the usual one. */
4546 /* Return a string for the output of a mode line %-spec for window W,
4547 generated by character C. SPEC_WIDTH is the field width when
4548 padding to the left (%c, %l). The value returned from this
4549 function will later be truncated to width MAXWIDTH. */
4551 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
4554 decode_mode_spec (w
, c
, spec_width
, maxwidth
)
4557 register int spec_width
;
4558 register int maxwidth
;
4561 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4562 char *decode_mode_spec_buf
= (char *) FRAME_TEMP_GLYPHS (f
)->total_contents
;
4563 struct buffer
*b
= XBUFFER (w
->buffer
);
4566 if (maxwidth
> FRAME_WIDTH (f
))
4567 maxwidth
= FRAME_WIDTH (f
);
4572 if (!NILP (b
->read_only
))
4574 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4579 /* This differs from %* only for a modified read-only buffer. */
4580 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4582 if (!NILP (b
->read_only
))
4587 /* This differs from %* in ignoring read-only-ness. */
4588 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4600 if (command_loop_level
> 5)
4602 p
= decode_mode_spec_buf
;
4603 for (i
= 0; i
< command_loop_level
; i
++)
4606 return decode_mode_spec_buf
;
4614 if (command_loop_level
> 5)
4616 p
= decode_mode_spec_buf
;
4617 for (i
= 0; i
< command_loop_level
; i
++)
4620 return decode_mode_spec_buf
;
4628 if (maxwidth
< sizeof (lots_of_dashes
))
4629 return lots_of_dashes
;
4632 for (p
= decode_mode_spec_buf
, i
= maxwidth
; i
> 0; i
--)
4636 return decode_mode_spec_buf
;
4642 if (maxwidth
>= 3 && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4644 bcopy (XSTRING (obj
)->data
, decode_mode_spec_buf
, maxwidth
- 1);
4645 decode_mode_spec_buf
[maxwidth
- 1] = '\\';
4646 decode_mode_spec_buf
[maxwidth
] = '\0';
4647 return decode_mode_spec_buf
;
4654 int col
= current_column ();
4655 XSETFASTINT (w
->column_number_displayed
, col
);
4656 pint2str (decode_mode_spec_buf
, spec_width
, col
);
4657 return decode_mode_spec_buf
;
4661 /* %F displays the frame name. */
4662 /* Systems that can only display a single frame at a time should
4663 NOT replace the frame name with the (constant) frame title,
4664 since then they won't be able to tell which frame is that. */
4665 if (FRAME_WINDOW_P (f
) && !NILP (f
->title
))
4666 return (char *) XSTRING (f
->title
)->data
;
4667 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
4668 return (char *) XSTRING (f
->name
)->data
;
4676 else if (STRINGP (obj
) && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4678 bcopy ("...", decode_mode_spec_buf
, 3);
4679 bcopy (XSTRING (obj
)->data
+ STRING_BYTES (XSTRING (obj
)) - maxwidth
+ 3,
4680 decode_mode_spec_buf
+ 3, maxwidth
- 3);
4681 return decode_mode_spec_buf
;
4688 int startpos
= XMARKER (w
->start
)->charpos
;
4689 int startpos_byte
= marker_byte_position (w
->start
);
4690 int line
, linepos
, linepos_byte
, topline
;
4693 int height
= XFASTINT (w
->height
);
4695 /* If we decided that this buffer isn't suitable for line numbers,
4696 don't forget that too fast. */
4697 if (EQ (w
->base_line_pos
, w
->buffer
))
4699 /* But do forget it, if the window shows a different buffer now. */
4700 else if (BUFFERP (w
->base_line_pos
))
4701 w
->base_line_pos
= Qnil
;
4703 /* If the buffer is very big, don't waste time. */
4704 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
4706 w
->base_line_pos
= Qnil
;
4707 w
->base_line_number
= Qnil
;
4711 if (!NILP (w
->base_line_number
)
4712 && !NILP (w
->base_line_pos
)
4713 && XFASTINT (w
->base_line_pos
) <= startpos
)
4715 line
= XFASTINT (w
->base_line_number
);
4716 linepos
= XFASTINT (w
->base_line_pos
);
4717 linepos_byte
= buf_charpos_to_bytepos (b
, linepos
);
4722 linepos
= BUF_BEGV (b
);
4723 linepos_byte
= BUF_BEGV_BYTE (b
);
4726 /* Count lines from base line to window start position. */
4727 nlines
= display_count_lines (linepos
, linepos_byte
,
4731 topline
= nlines
+ line
;
4733 /* Determine a new base line, if the old one is too close
4734 or too far away, or if we did not have one.
4735 "Too close" means it's plausible a scroll-down would
4737 if (startpos
== BUF_BEGV (b
))
4739 XSETFASTINT (w
->base_line_number
, topline
);
4740 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
4742 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
4743 || linepos
== BUF_BEGV (b
))
4745 int limit
= BUF_BEGV (b
);
4746 int limit_byte
= BUF_BEGV_BYTE (b
);
4748 int distance
= (height
* 2 + 30) * 200;
4750 if (startpos
- distance
> limit
)
4752 limit
= startpos
- distance
;
4753 limit_byte
= CHAR_TO_BYTE (limit
);
4756 nlines
= display_count_lines (startpos
, startpos_byte
,
4758 - (height
* 2 + 30),
4760 /* If we couldn't find the lines we wanted within
4762 give up on line numbers for this window. */
4763 if (position
== limit_byte
&& limit
== startpos
- distance
)
4765 w
->base_line_pos
= w
->buffer
;
4766 w
->base_line_number
= Qnil
;
4770 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
4771 XSETFASTINT (w
->base_line_pos
, BYTE_TO_CHAR (position
));
4774 /* Now count lines from the start pos to point. */
4775 nlines
= display_count_lines (startpos
, startpos_byte
,
4776 PT_BYTE
, PT
, &junk
);
4778 /* Record that we did display the line number. */
4779 line_number_displayed
= 1;
4781 /* Make the string to show. */
4782 pint2str (decode_mode_spec_buf
, spec_width
, topline
+ nlines
);
4783 return decode_mode_spec_buf
;
4786 char* p
= decode_mode_spec_buf
;
4787 for (spec_width
-= 2; spec_width
> 0; --spec_width
) *p
++ = ' ';
4789 return decode_mode_spec_buf
;
4799 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
4805 int pos
= marker_position (w
->start
);
4806 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4808 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
4810 if (pos
<= BUF_BEGV (b
))
4815 else if (pos
<= BUF_BEGV (b
))
4819 if (total
> 1000000)
4820 /* Do it differently for a large value, to avoid overflow. */
4821 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4823 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4824 /* We can't normally display a 3-digit number,
4825 so get us a 2-digit number that is close. */
4828 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4829 return decode_mode_spec_buf
;
4833 /* Display percentage of size above the bottom of the screen. */
4836 int toppos
= marker_position (w
->start
);
4837 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
4838 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4840 if (botpos
>= BUF_ZV (b
))
4842 if (toppos
<= BUF_BEGV (b
))
4849 if (total
> 1000000)
4850 /* Do it differently for a large value, to avoid overflow. */
4851 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4853 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4854 /* We can't normally display a 3-digit number,
4855 so get us a 2-digit number that is close. */
4858 if (toppos
<= BUF_BEGV (b
))
4859 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
4861 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4862 return decode_mode_spec_buf
;
4867 /* status of process */
4868 obj
= Fget_buffer_process (w
->buffer
);
4870 return "no process";
4872 obj
= Fsymbol_name (Fprocess_status (obj
));
4876 case 't': /* indicate TEXT or BINARY */
4877 #ifdef MODE_LINE_BINARY_TEXT
4878 return MODE_LINE_BINARY_TEXT (b
);
4884 /* coding-system (not including end-of-line format) */
4886 /* coding-system (including end-of-line type) */
4888 int eol_flag
= (c
== 'Z');
4889 char *p
= decode_mode_spec_buf
;
4891 if (! FRAME_WINDOW_P (f
))
4893 /* No need to mention EOL here--the terminal never needs
4894 to do EOL conversion. */
4895 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, 0);
4896 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, 0);
4898 p
= decode_mode_spec_coding (b
->buffer_file_coding_system
,
4901 #if 0 /* This proves to be annoying; I think we can do without. -- rms. */
4903 obj
= Fget_buffer_process (Fcurrent_buffer ());
4906 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
4908 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
4911 #endif /* subprocesses */
4914 return decode_mode_spec_buf
;
4919 return (char *) XSTRING (obj
)->data
;
4924 /* Count up to COUNT lines starting from START / START_BYTE.
4925 But don't go beyond LIMIT_BYTE.
4926 Return the number of lines thus found (always nonnegative).
4928 Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */
4931 display_count_lines (start
, start_byte
, limit_byte
, count
, byte_pos_ptr
)
4932 int start
, start_byte
, limit_byte
, count
;
4935 register unsigned char *cursor
;
4936 unsigned char *base
;
4938 register int ceiling
;
4939 register unsigned char *ceiling_addr
;
4940 int orig_count
= count
;
4942 /* If we are not in selective display mode,
4943 check only for newlines. */
4944 int selective_display
= (!NILP (current_buffer
->selective_display
)
4945 && !INTEGERP (current_buffer
->selective_display
));
4949 while (start_byte
< limit_byte
)
4951 ceiling
= BUFFER_CEILING_OF (start_byte
);
4952 ceiling
= min (limit_byte
- 1, ceiling
);
4953 ceiling_addr
= BYTE_POS_ADDR (ceiling
) + 1;
4954 base
= (cursor
= BYTE_POS_ADDR (start_byte
));
4957 if (selective_display
)
4958 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
4961 while (*cursor
!= '\n' && ++cursor
!= ceiling_addr
)
4964 if (cursor
!= ceiling_addr
)
4968 start_byte
+= cursor
- base
+ 1;
4969 *byte_pos_ptr
= start_byte
;
4973 if (++cursor
== ceiling_addr
)
4979 start_byte
+= cursor
- base
;
4984 while (start_byte
> limit_byte
)
4986 ceiling
= BUFFER_FLOOR_OF (start_byte
- 1);
4987 ceiling
= max (limit_byte
, ceiling
);
4988 ceiling_addr
= BYTE_POS_ADDR (ceiling
) - 1;
4989 base
= (cursor
= BYTE_POS_ADDR (start_byte
- 1) + 1);
4992 if (selective_display
)
4993 while (--cursor
!= ceiling_addr
4994 && *cursor
!= '\n' && *cursor
!= 015)
4997 while (--cursor
!= ceiling_addr
&& *cursor
!= '\n')
5000 if (cursor
!= ceiling_addr
)
5004 start_byte
+= cursor
- base
+ 1;
5005 *byte_pos_ptr
= start_byte
;
5006 /* When scanning backwards, we should
5007 not count the newline posterior to which we stop. */
5008 return - orig_count
- 1;
5014 /* Here we add 1 to compensate for the last decrement
5015 of CURSOR, which took it past the valid range. */
5016 start_byte
+= cursor
- base
+ 1;
5020 *byte_pos_ptr
= limit_byte
;
5023 return - orig_count
+ count
;
5024 return orig_count
- count
;
5028 /* Display STRING on one line of window W, starting at HPOS.
5029 Display at position VPOS. Caller should have done get_display_line.
5030 If VPOS == -1, display it as the current frame's title.
5031 LENGTH is the length of STRING, or -1 meaning STRING is null-terminated.
5033 TRUNCATE is GLYPH to display at end if truncated. Zero for none.
5035 MINCOL is the first column ok to end at. (Pad with spaces to this col.)
5036 MAXCOL is the last column ok to end at. Truncate here.
5037 -1 for MINCOL or MAXCOL means no explicit minimum or maximum.
5038 Both count from the left edge of the frame, as does HPOS.
5039 The right edge of W is an implicit maximum.
5040 If TRUNCATE is nonzero, the implicit maximum is one column before the edge.
5042 OBEY_WINDOW_WIDTH says to put spaces or vertical bars
5043 at the place where the current window ends in this line
5044 and not display anything beyond there. Otherwise, only MAXCOL
5045 controls where to stop output.
5047 MULTIBYTE can be 0 meaning do not display multibyte chars,
5048 1 meaning do display them, or -1 meaning obey the current buffer's
5049 value of enable_multibyte_characters.
5051 Returns ending hpos. */
5054 display_string (w
, vpos
, string
, length
, hpos
, truncate
,
5055 obey_window_width
, mincol
, maxcol
, multibyte
)
5057 unsigned char *string
;
5061 int obey_window_width
;
5068 int hscroll
= XINT (w
->hscroll
);
5069 int tab_width
= XINT (XBUFFER (w
->buffer
)->tab_width
);
5070 register GLYPH
*start
;
5071 register GLYPH
*end
;
5072 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
5073 struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
5074 GLYPH
*p1start
= desired_glyphs
->glyphs
[vpos
] + hpos
;
5075 int window_width
= XFASTINT (w
->width
);
5077 /* Use the standard display table, not the window's display table.
5078 We don't want the mode line in rot13. */
5079 register struct Lisp_Char_Table
*dp
= 0;
5082 if (multibyte
== -1)
5083 multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
5084 /* Now multibyte is 1 if we should display multibyte characters. */
5086 if (DISP_TABLE_P (Vstandard_display_table
))
5087 dp
= XCHAR_TABLE (Vstandard_display_table
);
5089 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
5092 start
= desired_glyphs
->glyphs
[vpos
];
5094 if (obey_window_width
)
5096 start
+= XFASTINT (w
->left
);
5097 end
= start
+ window_width
- (truncate
!= 0);
5099 if (!WINDOW_RIGHTMOST_P (w
))
5101 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
5105 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
5108 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
5113 if (! obey_window_width
5114 || (maxcol
>= 0 && end
- desired_glyphs
->glyphs
[vpos
] > maxcol
))
5115 end
= desired_glyphs
->glyphs
[vpos
] + maxcol
;
5117 /* Store 0 in charstart for these columns. */
5118 for (i
= (hpos
>= 0 ? hpos
: 0); i
< end
- p1start
+ hpos
; i
++)
5119 desired_glyphs
->charstarts
[vpos
][i
] = 0;
5121 if (maxcol
>= 0 && mincol
> maxcol
)
5125 /* We need this value for multibyte characters. */
5126 length
= strlen (string
);
5128 /* We set truncated to 1 if we get stopped by trying to pass END
5129 (that is, trying to pass MAXCOL.) */
5138 c
= STRING_CHAR_AND_LENGTH (string
, length
, len
);
5140 c
= *string
, len
= 1;
5142 string
+= len
, length
-= len
;
5150 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
5152 p1
= copy_part_of_rope (f
, p1
, start
,
5153 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
5154 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
5157 else if (c
>= 040 && c
< 0177)
5167 if (p1
>= start
&& p1
< end
)
5171 while ((p1
- start
+ hscroll
- (hscroll
> 0)) % tab_width
);
5173 else if (c
< 0200 && ! NILP (buffer_defaults
.ctl_arrow
))
5177 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
5178 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
5179 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
5182 if (p1
>= start
&& p1
< end
)
5188 /* C is a control character or a binary byte data. */
5191 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
5192 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
5193 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
5196 if (p1
>= start
&& p1
< end
)
5197 *p1
= (c
>> 6) + '0';
5199 if (p1
>= start
&& p1
< end
)
5200 *p1
= (7 & (c
>> 3)) + '0';
5202 if (p1
>= start
&& p1
< end
)
5203 *p1
= (7 & c
) + '0';
5208 /* C is a multibyte character. */
5209 int charset
= CHAR_CHARSET (c
);
5210 int columns
= (charset
== CHARSET_COMPOSITION
5211 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
5212 : CHARSET_WIDTH (charset
));
5216 /* Since we can't show the left part of C, fill all
5217 columns with spaces. */
5218 columns
-= start
- p1
;
5227 else if (p1
+ columns
> end
)
5229 /* Since we can't show the right part of C, fill all
5230 columns with TRUNCATE if TRUNCATE is specified. */
5234 *p1
++ = fix_glyph (f
, truncate
, 0);
5235 /* And tell the line is truncated. */
5242 /* We can show the whole glyph of C. */
5245 *p1
++ = c
| GLYPH_MASK_PADDING
;
5253 if (truncate
) *p1
++ = fix_glyph (f
, truncate
, 0);
5255 else if (mincol
>= 0)
5257 end
= desired_glyphs
->glyphs
[vpos
] + mincol
;
5263 register int len
= p1
- desired_glyphs
->glyphs
[vpos
];
5265 if (len
> desired_glyphs
->used
[vpos
])
5266 desired_glyphs
->used
[vpos
] = len
;
5267 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
5273 /* This is like a combination of memq and assq.
5274 Return 1 if PROPVAL appears as an element of LIST
5275 or as the car of an element of LIST.
5276 If PROPVAL is a list, compare each element against LIST
5277 in that way, and return 1 if any element of PROPVAL is found in LIST.
5279 This function cannot quit. */
5282 invisible_p (propval
, list
)
5283 register Lisp_Object propval
;
5286 register Lisp_Object tail
, proptail
;
5287 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5289 register Lisp_Object tem
;
5290 tem
= XCONS (tail
)->car
;
5291 if (EQ (propval
, tem
))
5293 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5296 if (CONSP (propval
))
5297 for (proptail
= propval
; CONSP (proptail
);
5298 proptail
= XCONS (proptail
)->cdr
)
5300 Lisp_Object propelt
;
5301 propelt
= XCONS (proptail
)->car
;
5302 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5304 register Lisp_Object tem
;
5305 tem
= XCONS (tail
)->car
;
5306 if (EQ (propelt
, tem
))
5308 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5315 /* Return 1 if PROPVAL appears as the car of an element of LIST
5316 and the cdr of that element is non-nil.
5317 If PROPVAL is a list, check each element of PROPVAL in that way,
5318 and the first time some element is found,
5319 return 1 if the cdr of that element is non-nil.
5321 This function cannot quit. */
5324 invisible_ellipsis_p (propval
, list
)
5325 register Lisp_Object propval
;
5328 register Lisp_Object tail
, proptail
;
5329 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5331 register Lisp_Object tem
;
5332 tem
= XCONS (tail
)->car
;
5333 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5334 return ! NILP (XCONS (tem
)->cdr
);
5336 if (CONSP (propval
))
5337 for (proptail
= propval
; CONSP (proptail
);
5338 proptail
= XCONS (proptail
)->cdr
)
5340 Lisp_Object propelt
;
5341 propelt
= XCONS (proptail
)->car
;
5342 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5344 register Lisp_Object tem
;
5345 tem
= XCONS (tail
)->car
;
5346 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5347 return ! NILP (XCONS (tem
)->cdr
);
5356 staticpro (&Qmenu_bar_update_hook
);
5357 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
5359 staticpro (&Qoverriding_terminal_local_map
);
5360 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
5362 staticpro (&Qoverriding_local_map
);
5363 Qoverriding_local_map
= intern ("overriding-local-map");
5365 staticpro (&Qwindow_scroll_functions
);
5366 Qwindow_scroll_functions
= intern ("window-scroll-functions");
5368 staticpro (&Qredisplay_end_trigger_functions
);
5369 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
5371 staticpro (&Qinhibit_point_motion_hooks
);
5372 Qinhibit_point_motion_hooks
= intern ("inhibit-point-motion-hooks");
5374 staticpro (&last_arrow_position
);
5375 staticpro (&last_arrow_string
);
5376 last_arrow_position
= Qnil
;
5377 last_arrow_string
= Qnil
;
5379 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
5380 "String (or mode line construct) included (normally) in `mode-line-format'.");
5381 Vglobal_mode_string
= Qnil
;
5383 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
5384 "Marker for where to display an arrow on top of the buffer text.\n\
5385 This must be the beginning of a line in order to work.\n\
5386 See also `overlay-arrow-string'.");
5387 Voverlay_arrow_position
= Qnil
;
5389 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
5390 "String to display as an arrow. See also `overlay-arrow-position'.");
5391 Voverlay_arrow_string
= Qnil
;
5393 DEFVAR_INT ("scroll-step", &scroll_step
,
5394 "*The number of lines to try scrolling a window by when point moves out.\n\
5395 If that fails to bring point back on frame, point is centered instead.\n\
5396 If this is zero, point is always centered after it moves off frame.");
5398 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
5399 "*Scroll up to this many lines, to bring point back on screen.");
5400 scroll_conservatively
= 0;
5402 DEFVAR_INT ("scroll-margin", &scroll_margin
,
5403 "*Number of lines of margin at the top and bottom of a window.\n\
5404 Recenter the window whenever point gets within this many lines\n\
5405 of the top or bottom of the window.");
5408 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
5410 DEFVAR_BOOL ("truncate-partial-width-windows",
5411 &truncate_partial_width_windows
,
5412 "*Non-nil means truncate lines in all windows less than full frame wide.");
5413 truncate_partial_width_windows
= 1;
5415 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
5416 "*Non-nil means use inverse video for the mode line.");
5417 mode_line_inverse_video
= 1;
5419 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
5420 "*Maximum buffer size (in characters) for line number display\n\
5421 If the buffer is bigger than this, the line number does not appear\n\
5422 in the mode line..");
5423 line_number_display_limit
= 1000000;
5425 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
5426 "*Non-nil means highlight region even in nonselected windows.");
5427 highlight_nonselected_windows
= 0;
5429 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
5430 "Non-nil if more than one frame is visible on this display.\n\
5431 Minibuffer-only frames don't count, but iconified frames do.\n\
5432 This variable is not guaranteed to be accurate except while processing\n\
5433 `frame-title-format' and `icon-title-format'.");
5435 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
5436 "Template for displaying the titlebar of visible frames.\n\
5437 \(Assuming the window manager supports this feature.)\n\
5438 This variable has the same structure as `mode-line-format' (which see),\n\
5439 and is used only on frames for which no explicit name has been set\n\
5440 \(see `modify-frame-parameters').");
5441 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
5442 "Template for displaying the titlebar of an iconified frame.\n\
5443 \(Assuming the window manager supports this feature.)\n\
5444 This variable has the same structure as `mode-line-format' (which see),\n\
5445 and is used only on frames for which no explicit name has been set\n\
5446 \(see `modify-frame-parameters').");
5448 = Vframe_title_format
5449 = Fcons (intern ("multiple-frames"),
5450 Fcons (build_string ("%b"),
5451 Fcons (Fcons (build_string (""),
5452 Fcons (intern ("invocation-name"),
5453 Fcons (build_string ("@"),
5454 Fcons (intern ("system-name"),
5458 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
5459 "Maximum number of lines to keep in the message log buffer.\n\
5460 If nil, disable message logging. If t, log messages but don't truncate\n\
5461 the buffer when it becomes large.");
5462 XSETFASTINT (Vmessage_log_max
, 50);
5464 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
5465 "Functions called before redisplay, if window sizes have changed.\n\
5466 The value should be a list of functions that take one argument.\n\
5467 Just before redisplay, for each frame, if any of its windows have changed\n\
5468 size since the last redisplay, or have been split or deleted,\n\
5469 all the functions in the list are called, with the frame as argument.");
5470 Vwindow_size_change_functions
= Qnil
;
5472 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
5473 "List of functions to call before redisplaying a window with scrolling.\n\
5474 Each function is called with two arguments, the window\n\
5475 and its new display-start position. Note that the value of `window-end'\n\
5476 is not valid when these functions are called.");
5477 Vwindow_scroll_functions
= Qnil
;
5479 DEFVAR_INT ("minibuffer-scroll-overlap", &minibuffer_scroll_overlap
,
5480 "*Number of characters of overlap when scrolling a one-line window.\n\
5481 This commonly affects the minibuffer window, hence the name of the variable.");
5482 minibuffer_scroll_overlap
= 20;
5485 /* initialize the window system */
5489 Lisp_Object root_window
;
5490 #ifndef COMPILER_REGISTER_BUG
5492 #endif /* COMPILER_REGISTER_BUG */
5493 struct window
*mini_w
;
5495 this_line_bufpos
= 0;
5497 mini_w
= XWINDOW (minibuf_window
);
5498 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
5500 echo_area_glyphs
= 0;
5501 previous_echo_glyphs
= 0;
5503 if (!noninteractive
)
5505 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
5506 XSETFASTINT (XWINDOW (root_window
)->top
, FRAME_MENU_BAR_LINES (f
));
5507 set_window_height (root_window
,
5508 FRAME_HEIGHT (f
) - 1 - FRAME_MENU_BAR_LINES (f
),
5510 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
5511 set_window_height (minibuf_window
, 1, 0);
5513 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
5514 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));