1 /* Display generation from window structure and buffer text.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 1998
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 /*#include <ctype.h>*/
31 #include "dispextern.h"
38 #include "termhooks.h"
39 #include "intervals.h"
43 #include "region-cache.h"
49 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
50 extern void set_frame_menubar ();
51 extern int pending_menu_activation
;
54 extern int interrupt_input
;
55 extern int command_loop_level
;
57 extern int minibuffer_auto_raise
;
59 extern Lisp_Object Qface
;
61 extern Lisp_Object Voverriding_local_map
;
62 extern Lisp_Object Voverriding_local_map_menu_flag
;
64 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
65 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
66 Lisp_Object Qredisplay_end_trigger_functions
;
67 Lisp_Object Qinhibit_point_motion_hooks
;
69 /* Nonzero means print newline to stdout before next minibuffer message. */
71 int noninteractive_need_newline
;
73 /* Nonzero means print newline to message log before next message. */
75 static int message_log_need_newline
;
77 #define min(a, b) ((a) < (b) ? (a) : (b))
78 #define max(a, b) ((a) > (b) ? (a) : (b))
79 #define minmax(floor, val, ceil) \
80 ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val))
82 /* The buffer position of the first character appearing
83 entirely or partially on the current frame line.
84 Or zero, which disables the optimization for the current frame line. */
85 static int this_line_bufpos
;
87 /* Number of characters past the end of this line,
88 including the terminating newline */
89 static int this_line_endpos
;
91 /* The vertical position of this frame line. */
92 static int this_line_vpos
;
94 /* Hpos value for start of display on this frame line.
95 Usually zero, but negative if first character really began
97 static int this_line_start_hpos
;
99 /* Buffer that this_line variables are describing. */
100 static struct buffer
*this_line_buffer
;
102 /* Value of echo_area_glyphs when it was last acted on.
103 If this is nonzero, there is a message on the frame
104 in the minibuffer and it should be erased as soon
105 as it is no longer requested to appear. */
106 char *previous_echo_glyphs
;
108 /* Nonzero means truncate lines in all windows less wide than the frame */
109 int truncate_partial_width_windows
;
111 /* Nonzero means we have more than one non-minibuffer-only frame.
112 Not guaranteed to be accurate except while parsing frame-title-format. */
115 Lisp_Object Vglobal_mode_string
;
117 /* Marker for where to display an arrow on top of the buffer text. */
118 Lisp_Object Voverlay_arrow_position
;
120 /* String to display for the arrow. */
121 Lisp_Object Voverlay_arrow_string
;
123 /* Values of those variables at last redisplay.
124 However, if Voverlay_arrow_position is a marker,
125 last_arrow_position is its numerical position. */
126 static Lisp_Object last_arrow_position
, last_arrow_string
;
128 /* Like mode-line-format, but for the titlebar on a visible frame. */
129 Lisp_Object Vframe_title_format
;
131 /* Like mode-line-format, but for the titlebar on an iconified frame. */
132 Lisp_Object Vicon_title_format
;
134 /* List of functions to call when a window's size changes. These
135 functions get one arg, a frame on which one or more windows' sizes
137 static Lisp_Object Vwindow_size_change_functions
;
139 Lisp_Object Qmenu_bar_update_hook
;
141 /* Nonzero if overlay arrow has been displayed once in this window. */
142 static int overlay_arrow_seen
;
144 /* Nonzero if visible end of buffer has already been displayed once
145 in this window. (We need this variable in case there are overlay
146 strings that get displayed there.) */
147 static int zv_strings_seen
;
149 /* Nonzero means highlight the region even in nonselected windows. */
150 static int highlight_nonselected_windows
;
152 /* If cursor motion alone moves point off frame,
153 Try scrolling this many lines up or down if that will bring it back. */
154 static int scroll_step
;
156 /* Non-0 means scroll just far enough to bring point back on the screen,
158 static int scroll_conservatively
;
160 /* Recenter the window whenever point gets within this many lines
161 of the top or bottom of the window. */
164 /* Number of characters of overlap to show,
165 when scrolling a one-line window such as a minibuffer. */
166 static int minibuffer_scroll_overlap
;
168 /* Nonzero if try_window_id has made blank lines at window bottom
169 since the last redisplay that paused */
170 static int blank_end_of_window
;
172 /* Number of windows showing the buffer of the selected window
173 (or another buffer with the same base buffer).
174 keyboard.c refers to this. */
177 /* display_text_line sets these to the frame position (origin 0) of point,
178 whether the window is selected or not.
179 Set one to -1 first to determine whether point was found afterwards. */
181 static int cursor_vpos
;
182 static int cursor_hpos
;
184 static int debug_end_pos
;
186 /* Nonzero means display mode line highlighted */
187 int mode_line_inverse_video
;
189 static void redisplay_internal ();
190 static int message_log_check_duplicate ();
191 static void echo_area_display ();
192 void mark_window_display_accurate ();
193 static void redisplay_windows ();
194 static void redisplay_window ();
195 static void update_menu_bar ();
196 static void try_window ();
197 static int try_window_id ();
198 static struct position
*display_text_line ();
199 static void display_mode_line ();
200 static int display_mode_element ();
201 static char *decode_mode_spec ();
202 static int display_string ();
203 static void display_menu_bar ();
204 static int display_count_lines ();
206 /* Prompt to display in front of the minibuffer contents */
207 Lisp_Object minibuf_prompt
;
209 /* Width in columns of current minibuffer prompt. */
210 int minibuf_prompt_width
;
212 /* Message to display instead of minibuffer contents
213 This is what the functions error and message make,
214 and command echoing uses it as well.
215 It overrides the minibuf_prompt as well as the buffer. */
216 char *echo_area_glyphs
;
218 /* This is the length of the message in echo_area_glyphs. */
219 int echo_area_glyphs_length
;
221 /* This is the window where the echo area message was displayed.
222 It is always a minibuffer window, but it may not be the
223 same window currently active as a minibuffer. */
224 Lisp_Object echo_area_window
;
226 /* Nonzero means multibyte characters were enabled when the echo area
227 message was specified. */
228 int message_enable_multibyte
;
230 /* true iff we should redraw the mode lines on the next redisplay */
231 int update_mode_lines
;
233 /* Smallest number of characters before the gap
234 at any time since last redisplay that finished.
235 Valid for current buffer when try_window_id can be called. */
238 /* Smallest number of characters after the gap
239 at any time since last redisplay that finished.
240 Valid for current buffer when try_window_id can be called. */
243 /* MODIFF as of last redisplay that finished;
244 if it matches MODIFF, and overlay_unchanged_modified
245 matches OVERLAY_MODIFF, that means beg_unchanged and end_unchanged
246 contain no useful information */
247 int unchanged_modified
;
249 /* OVERLAY_MODIFF as of last redisplay that finished. */
250 int overlay_unchanged_modified
;
252 /* Nonzero if window sizes or contents have changed
253 since last redisplay that finished */
254 int windows_or_buffers_changed
;
256 /* Nonzero after display_mode_line if %l was used
257 and it displayed a line number. */
258 int line_number_displayed
;
260 /* Maximum buffer size for which to display line numbers. */
261 static int line_number_display_limit
;
263 /* Number of lines to keep in the message log buffer.
264 t means infinite. nil means don't log at all. */
265 Lisp_Object Vmessage_log_max
;
267 #define COERCE_MARKER(X) \
268 (MARKERP ((X)) ? Fmarker_position (X) : (X))
270 static int pos_tab_offset
P_ ((struct window
*, int, int));
272 /* Output a newline in the *Messages* buffer if "needs" one. */
275 message_log_maybe_newline ()
277 if (message_log_need_newline
)
278 message_dolog ("", 0, 1, 0);
282 /* Add a string to the message log, optionally terminated with a newline.
283 This function calls low-level routines in order to bypass text property
284 hooks, etc. which might not be safe to run.
285 MULTIBYTE, if nonzero, means interpret the contents of M as multibyte. */
288 message_dolog (m
, len
, nlflag
, multibyte
)
290 int len
, nlflag
, multibyte
;
292 if (!NILP (Vmessage_log_max
))
294 struct buffer
*oldbuf
;
295 Lisp_Object oldpoint
, oldbegv
, oldzv
;
296 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
297 int point_at_end
= 0;
299 Lisp_Object old_deactivate_mark
;
301 old_deactivate_mark
= Vdeactivate_mark
;
302 oldbuf
= current_buffer
;
303 Fset_buffer (Fget_buffer_create (build_string ("*Messages*")));
304 current_buffer
->undo_list
= Qt
;
306 oldpoint
= Fpoint_marker ();
307 oldbegv
= Fpoint_min_marker ();
308 oldzv
= Fpoint_max_marker ();
316 BEGV_BYTE
= BEG_BYTE
;
319 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
321 /* Insert the string--maybe converting multibyte to single byte
322 or vice versa, so that all the text fits the buffer. */
324 && NILP (current_buffer
->enable_multibyte_characters
))
326 int c
, i
= 0, nbytes
;
327 /* Convert a multibyte string to single-byte
328 for the *Message* buffer. */
331 c
= STRING_CHAR (m
+ i
, len
- i
);
332 i
+= XFASTINT (Fchar_bytes (make_number (c
)));
333 /* Truncate the character to its last byte--we can only hope
334 the user is happy with the character he gets,
335 since if it isn't right, there is no way to do it right. */
341 && ! NILP (current_buffer
->enable_multibyte_characters
))
344 unsigned char *msg
= (unsigned char *) m
;
345 /* Convert a single-byte string to multibyte
346 for the *Message* buffer. */
349 int c
= unibyte_char_to_multibyte (msg
[i
++]);
354 insert_1 (m
, len
, 1, 0, 0);
358 int this_bol
, this_bol_byte
, prev_bol
, prev_bol_byte
, dup
;
359 insert_1 ("\n", 1, 1, 0, 0);
361 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
, -2, 0);
363 this_bol_byte
= PT_BYTE
;
367 scan_newline (PT
, PT_BYTE
, BEG
, BEG_BYTE
, -2, 0);
369 prev_bol_byte
= PT_BYTE
;
371 dup
= message_log_check_duplicate (prev_bol
, prev_bol_byte
,
372 this_bol
, this_bol_byte
);
375 del_range_both (prev_bol
, prev_bol_byte
,
376 this_bol
, this_bol_byte
, 0);
382 /* If you change this format, don't forget to also
383 change message_log_check_duplicate. */
384 sprintf (dupstr
, " [%d times]", dup
);
385 duplen
= strlen (dupstr
);
386 TEMP_SET_PT_BOTH (Z
- 1, Z_BYTE
- 1);
387 insert_1 (dupstr
, duplen
, 1, 0, 1);
392 if (NATNUMP (Vmessage_log_max
))
394 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
,
395 -XFASTINT (Vmessage_log_max
) - 1, 0);
396 del_range_both (BEG
, BEG_BYTE
, PT
, PT_BYTE
, 0);
399 BEGV
= XMARKER (oldbegv
)->charpos
;
400 BEGV_BYTE
= marker_byte_position (oldbegv
);
409 ZV
= XMARKER (oldzv
)->charpos
;
410 ZV_BYTE
= marker_byte_position (oldzv
);
414 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
416 Fgoto_char (oldpoint
);
418 free_marker (oldpoint
);
419 free_marker (oldbegv
);
422 set_buffer_internal (oldbuf
);
423 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
424 message_log_need_newline
= !nlflag
;
425 Vdeactivate_mark
= old_deactivate_mark
;
429 /* We are at the end of the buffer after just having inserted a newline.
430 (Note: We depend on the fact we won't be crossing the gap.)
431 Check to see if the most recent message looks a lot like the previous one.
432 Return 0 if different, 1 if the new one should just replace it, or a
433 value N > 1 if we should also append " [N times]". */
436 message_log_check_duplicate (prev_bol
, prev_bol_byte
, this_bol
, this_bol_byte
)
437 int prev_bol
, this_bol
;
438 int prev_bol_byte
, this_bol_byte
;
441 int len
= Z
- 1 - this_bol
;
443 unsigned char *p1
= BUF_BYTE_ADDRESS (current_buffer
, prev_bol_byte
);
444 unsigned char *p2
= BUF_BYTE_ADDRESS (current_buffer
, this_bol_byte
);
446 for (i
= 0; i
< len
; i
++)
448 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.'
457 if (*p1
++ == ' ' && *p1
++ == '[')
460 while (*p1
>= '0' && *p1
<= '9')
461 n
= n
* 10 + *p1
++ - '0';
462 if (strncmp (p1
, " times]\n", 8) == 0)
468 /* Display an echo area message M with a specified length of LEN chars.
469 The string may include null characters. If M is 0, clear out any
470 existing message, and let the minibuffer text show through.
472 The buffer M must continue to exist until after the echo area
473 gets cleared or some other message gets displayed there.
475 Do not pass text that is stored in a Lisp string.
476 Do not pass text in a buffer that was alloca'd. */
479 message2 (m
, len
, multibyte
)
484 /* First flush out any partial line written with print. */
485 message_log_maybe_newline ();
487 message_dolog (m
, len
, 1, multibyte
);
488 message2_nolog (m
, len
, multibyte
);
492 /* The non-logging counterpart of message2. */
495 message2_nolog (m
, len
, multibyte
)
499 message_enable_multibyte
= multibyte
;
503 if (noninteractive_need_newline
)
505 noninteractive_need_newline
= 0;
507 fwrite (m
, len
, 1, stderr
);
508 if (cursor_in_echo_area
== 0)
509 fprintf (stderr
, "\n");
512 /* A null message buffer means that the frame hasn't really been
513 initialized yet. Error messages get reported properly by
514 cmd_error, so this must be just an informative message; toss it. */
515 else if (INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
517 Lisp_Object mini_window
;
520 /* Get the frame containing the minibuffer
521 that the selected frame is using. */
522 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
523 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
525 FRAME_SAMPLE_VISIBILITY (f
);
526 if (FRAME_VISIBLE_P (selected_frame
)
527 && ! FRAME_VISIBLE_P (f
))
528 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
532 echo_area_glyphs
= m
;
533 echo_area_glyphs_length
= len
;
535 if (minibuffer_auto_raise
)
536 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
539 echo_area_glyphs
= previous_echo_glyphs
= 0;
541 do_pending_window_change ();
542 echo_area_display ();
543 update_frame (f
, 1, 1);
544 do_pending_window_change ();
545 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
546 (*frame_up_to_date_hook
) (f
);
550 /* Display in echo area the null-terminated ASCII-only string M.
551 If M is 0, clear out any existing message,
552 and let the minibuffer text show through.
554 The string M must continue to exist until after the echo area
555 gets cleared or some other message gets displayed there.
557 Do not pass text that is stored in a Lisp string.
558 Do not pass text in a buffer that was alloca'd. */
564 message2 (m
, (m
? strlen (m
) : 0), 0);
571 message2_nolog (m
, (m
? strlen (m
) : 0), 0);
574 /* Display a message M which contains a single %s
575 which gets replaced with STRING. */
578 message_with_string (m
, string
, log
)
587 if (noninteractive_need_newline
)
589 noninteractive_need_newline
= 0;
590 fprintf (stderr
, m
, XSTRING (string
)->data
);
591 if (cursor_in_echo_area
== 0)
592 fprintf (stderr
, "\n");
596 else if (INTERACTIVE
)
598 /* The frame whose minibuffer we're going to display the message on.
599 It may be larger than the selected frame, so we need
600 to use its buffer, not the selected frame's buffer. */
601 Lisp_Object mini_window
;
604 /* Get the frame containing the minibuffer
605 that the selected frame is using. */
606 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
607 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
609 /* A null message buffer means that the frame hasn't really been
610 initialized yet. Error messages get reported properly by
611 cmd_error, so this must be just an informative message; toss it. */
612 if (FRAME_MESSAGE_BUF (f
))
616 a
[0] = (char *) XSTRING (string
)->data
;
618 len
= doprnt (FRAME_MESSAGE_BUF (f
),
619 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
622 message2 (FRAME_MESSAGE_BUF (f
), len
,
623 STRING_MULTIBYTE (string
));
625 message2_nolog (FRAME_MESSAGE_BUF (f
), len
,
626 STRING_MULTIBYTE (string
));
628 /* Print should start at the beginning of the message
630 message_buf_print
= 0;
635 /* Truncate what will be displayed in the echo area
636 the next time we display it--but don't redisplay it now. */
639 truncate_echo_area (len
)
642 /* A null message buffer means that the frame hasn't really been
643 initialized yet. Error messages get reported properly by
644 cmd_error, so this must be just an informative message; toss it. */
645 if (!noninteractive
&& INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
646 echo_area_glyphs_length
= len
;
649 /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print;
650 zero if being used by message. */
651 int message_buf_print
;
653 /* Dump an informative message to the minibuf. If M is 0, clear out
654 any existing message, and let the minibuffer text show through. */
658 message (m
, a1
, a2
, a3
)
660 EMACS_INT a1
, a2
, a3
;
666 if (noninteractive_need_newline
)
668 noninteractive_need_newline
= 0;
669 fprintf (stderr
, m
, a1
, a2
, a3
);
670 if (cursor_in_echo_area
== 0)
671 fprintf (stderr
, "\n");
675 else if (INTERACTIVE
)
677 /* The frame whose minibuffer we're going to display the message on.
678 It may be larger than the selected frame, so we need
679 to use its buffer, not the selected frame's buffer. */
680 Lisp_Object mini_window
;
683 /* Get the frame containing the minibuffer
684 that the selected frame is using. */
685 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
686 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
688 /* A null message buffer means that the frame hasn't really been
689 initialized yet. Error messages get reported properly by
690 cmd_error, so this must be just an informative message; toss it. */
691 if (FRAME_MESSAGE_BUF (f
))
702 len
= doprnt (FRAME_MESSAGE_BUF (f
),
703 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
705 len
= doprnt (FRAME_MESSAGE_BUF (f
),
706 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3,
708 #endif /* NO_ARG_ARRAY */
710 message2 (FRAME_MESSAGE_BUF (f
), len
, 0);
715 /* Print should start at the beginning of the message
717 message_buf_print
= 0;
722 /* The non-logging version of message. */
724 message_nolog (m
, a1
, a2
, a3
)
726 EMACS_INT a1
, a2
, a3
;
728 Lisp_Object old_log_max
;
729 old_log_max
= Vmessage_log_max
;
730 Vmessage_log_max
= Qnil
;
731 message (m
, a1
, a2
, a3
);
732 Vmessage_log_max
= old_log_max
;
738 message2 (echo_area_glyphs
, echo_area_glyphs_length
,
739 ! NILP (current_buffer
->enable_multibyte_characters
));
747 Lisp_Object mini_window
;
749 /* Choose the minibuffer window for this display.
750 It is the minibuffer window used by the selected frame. */
751 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
752 /* This is the frame that window is in. */
753 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
755 if (! FRAME_VISIBLE_P (f
))
760 redraw_garbaged_frames ();
764 if (echo_area_glyphs
|| minibuf_level
== 0)
768 echo_area_window
= mini_window
;
770 vpos
= XFASTINT (XWINDOW (mini_window
)->top
);
771 get_display_line (f
, vpos
, 0);
773 /* Make sure the columns that overlap a left-hand scroll bar
775 for (i
= 0; i
< FRAME_LEFT_SCROLL_BAR_WIDTH (f
); i
++)
776 f
->desired_glyphs
->glyphs
[vpos
][i
] = SPACEGLYPH
;
778 display_string (XWINDOW (mini_window
), vpos
,
779 echo_area_glyphs
? echo_area_glyphs
: "",
780 echo_area_glyphs
? echo_area_glyphs_length
: -1,
781 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
783 FRAME_WIDTH (f
) + FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
784 message_enable_multibyte
);
786 #if 0 /* This just gets in the way. update_frame does the job. */
787 /* If desired cursor location is on this line, put it at end of text */
788 if (cursor_in_echo_area
)
789 FRAME_CURSOR_Y (f
) = vpos
;
790 if (FRAME_CURSOR_Y (f
) == vpos
)
791 FRAME_CURSOR_X (f
) = FRAME_DESIRED_GLYPHS (f
)->used
[vpos
];
794 /* Fill the rest of the minibuffer window with blank lines. */
799 i
< vpos
+ XFASTINT (XWINDOW (mini_window
)->height
); i
++)
801 get_display_line (f
, i
, 0);
802 /* We don't use FRAME_SCROLL_BAR_WIDTH (f) as the starting
803 hpos, because it is good to clear whatever is behind the
804 scroll bar. This does not affect the scroll bar itself. */
805 display_string (XWINDOW (mini_window
), i
,
808 0, FRAME_WIDTH (f
) + FRAME_SCROLL_BAR_WIDTH (f
),
813 else if (!EQ (mini_window
, selected_window
))
814 windows_or_buffers_changed
++;
816 if (EQ (mini_window
, selected_window
))
817 this_line_bufpos
= 0;
819 previous_echo_glyphs
= echo_area_glyphs
;
822 /* Update frame titles. */
824 #ifdef HAVE_WINDOW_SYSTEM
825 static char frame_title_buf
[512];
826 static char *frame_title_ptr
;
829 store_frame_title (str
, mincol
, maxcol
)
834 if (maxcol
< 0 || maxcol
>= sizeof(frame_title_buf
))
835 maxcol
= sizeof (frame_title_buf
);
836 limit
= &frame_title_buf
[maxcol
];
837 while (*str
!= '\0' && frame_title_ptr
< limit
)
838 *frame_title_ptr
++ = *str
++;
839 while (frame_title_ptr
< &frame_title_buf
[mincol
])
840 *frame_title_ptr
++ = ' ';
841 return frame_title_ptr
- frame_title_buf
;
845 x_consider_frame_title (frame
)
851 FRAME_PTR f
= XFRAME (frame
);
853 if (!(FRAME_WINDOW_P (f
) || FRAME_MINIBUF_ONLY_P (f
) || f
->explicit_name
))
856 /* Do we have more than one visible frame on this X display? */
860 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
862 FRAME_PTR tf
= XFRAME (XCONS (tail
)->car
);
864 if (tf
!= f
&& FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
865 && !FRAME_MINIBUF_ONLY_P (tf
)
866 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
870 multiple_frames
= CONSP (tail
);
873 obuf
= current_buffer
;
874 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
875 fmt
= (FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
);
876 frame_title_ptr
= frame_title_buf
;
877 len
= display_mode_element (XWINDOW (f
->selected_window
), 0, 0, 0,
878 0, sizeof (frame_title_buf
), fmt
);
880 set_buffer_internal (obuf
);
881 /* Set the name only if it's changed. This avoids consing
882 in the common case where it hasn't. (If it turns out that we've
883 already wasted too much time by walking through the list with
884 display_mode_element, then we might need to optimize at a higher
886 if (! STRINGP (f
->name
) || STRING_BYTES (XSTRING (f
->name
)) != len
887 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
888 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
891 #define frame_title_ptr ((char *)0)
892 #define store_frame_title(str, mincol, maxcol) 0
895 /* Prepare for redisplay by updating menu-bar item lists when appropriate.
896 This can call eval. */
901 register struct window
*w
= XWINDOW (selected_window
);
903 struct gcpro gcpro1
, gcpro2
;
905 all_windows
= (update_mode_lines
|| buffer_shared
> 1
906 || windows_or_buffers_changed
);
908 /* Update all frame titles based on their buffer names, etc.
909 We do this before the menu bars so that the buffer-menu
910 will show the up-to-date frame titles.
912 This used to be done after the menu bars, for a reason that
913 was stated as follows but which I do not understand:
914 "We do this after the menu bars so that the frame will first
915 create its menu bar using the name `emacs' if no other name
916 has yet been specified."
917 I think that is no longer a concern. */
918 #ifdef HAVE_WINDOW_SYSTEM
919 if (windows_or_buffers_changed
|| update_mode_lines
)
921 Lisp_Object tail
, frame
;
923 FOR_EACH_FRAME (tail
, frame
)
924 if (FRAME_VISIBLE_P (XFRAME (frame
))
925 || FRAME_ICONIFIED_P (XFRAME (frame
)))
926 x_consider_frame_title (frame
);
930 /* Update the menu bar item lists, if appropriate.
931 This has to be done before any actual redisplay
932 or generation of display lines. */
935 Lisp_Object tail
, frame
;
936 int count
= specpdl_ptr
- specpdl
;
938 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
940 FOR_EACH_FRAME (tail
, frame
)
942 /* If a window on this frame changed size,
943 report that to the user and clear the size-change flag. */
944 if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)))
946 Lisp_Object functions
;
947 /* Clear flag first in case we get error below. */
948 FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)) = 0;
949 functions
= Vwindow_size_change_functions
;
950 GCPRO2 (tail
, functions
);
951 while (CONSP (functions
))
953 call1 (XCONS (functions
)->car
, frame
);
954 functions
= XCONS (functions
)->cdr
;
959 update_menu_bar (XFRAME (frame
), 0);
963 unbind_to (count
, Qnil
);
966 update_menu_bar (selected_frame
, 1);
968 /* Motif needs this. See comment in xmenu.c.
969 Turn it off when pending_menu_activation is not defined. */
971 pending_menu_activation
= 0;
975 /* Do a frame update, taking possible shortcuts into account.
976 This is the main external entry point for redisplay.
978 If the last redisplay displayed an echo area message and that
979 message is no longer requested, we clear the echo area
980 or bring back the minibuffer if that is in use.
982 Do not call eval from within this function.
983 Calls to eval after the call to echo_area_display would confuse
984 the display_line mechanism and would cause a crash.
985 Calls to eval before that point will work most of the time,
986 but can still lose, because this function
987 can be called from signal handlers; with alarms set up;
988 or with synchronous processes running.
990 See Fcall_process; if you called it from here, it could be
991 entered recursively. */
993 static int do_verify_charstarts
;
995 /* Counter is used to clear the face cache
996 no more than once ever 1000 redisplays. */
997 static int clear_face_cache_count
;
999 /* Record the previous terminal frame we displayed. */
1000 static FRAME_PTR previous_terminal_frame
;
1005 redisplay_internal (0);
1008 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay
1009 is not in response to any user action; therefore, we should
1010 preserve the echo area. (Actually, our caller does that job.)
1011 Perhaps in the future avoid recentering windows
1012 if it is not necessary; currently that causes some problems. */
1015 redisplay_internal (preserve_echo_area
)
1016 int preserve_echo_area
;
1018 register struct window
*w
= XWINDOW (selected_window
);
1020 int must_finish
= 0;
1022 register int tlbufpos
, tlendpos
;
1023 struct position pos
;
1024 int number_of_visible_frames
;
1029 #ifdef USE_X_TOOLKIT
1030 if (popup_activated ())
1036 if (! FRAME_WINDOW_P (selected_frame
)
1037 && previous_terminal_frame
!= selected_frame
)
1039 /* Since frames on an ASCII terminal share the same display area,
1040 displaying a different frame means redisplay the whole thing. */
1041 windows_or_buffers_changed
++;
1042 SET_FRAME_GARBAGED (selected_frame
);
1043 XSETFRAME (Vterminal_frame
, selected_frame
);
1045 previous_terminal_frame
= selected_frame
;
1047 /* Set the visible flags for all frames.
1048 Do this before checking for resized or garbaged frames; they want
1049 to know if their frames are visible.
1050 See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */
1052 Lisp_Object tail
, frame
;
1054 number_of_visible_frames
= 0;
1056 FOR_EACH_FRAME (tail
, frame
)
1058 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1060 if (FRAME_VISIBLE_P (XFRAME (frame
)))
1061 number_of_visible_frames
++;
1063 /* Clear out all the display lines in which we will generate the
1064 glyphs to display. */
1065 init_desired_glyphs (XFRAME (frame
));
1069 /* Notice any pending interrupt request to change frame size. */
1070 do_pending_window_change ();
1074 redraw_garbaged_frames ();
1078 prepare_menu_bars ();
1080 if (windows_or_buffers_changed
)
1081 update_mode_lines
++;
1083 /* Detect case that we need to write or remove a star in the mode line. */
1084 if ((SAVE_MODIFF
< MODIFF
) != !NILP (w
->last_had_star
))
1086 w
->update_mode_line
= Qt
;
1087 if (buffer_shared
> 1)
1088 update_mode_lines
++;
1091 /* If %c is in use, update it if needed. */
1092 if (!NILP (w
->column_number_displayed
)
1093 /* This alternative quickly identifies a common case
1094 where no change is needed. */
1095 && !(PT
== XFASTINT (w
->last_point
)
1096 && XFASTINT (w
->last_modified
) >= MODIFF
1097 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1098 && XFASTINT (w
->column_number_displayed
) != current_column ())
1099 w
->update_mode_line
= Qt
;
1101 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
1103 all_windows
= update_mode_lines
|| buffer_shared
> 1;
1105 /* If specs for an arrow have changed, do thorough redisplay
1106 to ensure we remove any arrow that should no longer exist. */
1107 if (! EQ (COERCE_MARKER (Voverlay_arrow_position
), last_arrow_position
)
1108 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
1111 /* Normally the message* functions will have already displayed and
1112 updated the echo area, but the frame may have been trashed, or
1113 the update may have been preempted, so display the echo area
1115 if (echo_area_glyphs
|| previous_echo_glyphs
)
1117 echo_area_display ();
1121 /* If showing region, and mark has changed, must redisplay whole window. */
1122 if (((!NILP (Vtransient_mark_mode
)
1123 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1124 != !NILP (w
->region_showing
))
1125 || (!NILP (w
->region_showing
)
1126 && !EQ (w
->region_showing
,
1127 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
1128 this_line_bufpos
= -1;
1130 tlbufpos
= this_line_bufpos
;
1131 tlendpos
= this_line_endpos
;
1132 if (!all_windows
&& tlbufpos
> 0 && NILP (w
->update_mode_line
)
1133 && !current_buffer
->clip_changed
1134 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
1135 && !FRAME_OBSCURED_P (XFRAME (w
->frame
))
1136 /* Make sure recorded data applies to current buffer, etc */
1137 && this_line_buffer
== current_buffer
1138 && current_buffer
== XBUFFER (w
->buffer
)
1139 && NILP (w
->force_start
)
1140 /* Point must be on the line that we have info recorded about */
1142 && PT
<= Z
- tlendpos
1143 /* All text outside that line, including its final newline,
1144 must be unchanged */
1145 && ((XFASTINT (w
->last_modified
) >= MODIFF
1146 && (XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
))
1147 || (beg_unchanged
>= tlbufpos
- 1
1149 /* If selective display, can't optimize
1150 if the changes start at the beginning of the line. */
1151 && ((INTEGERP (current_buffer
->selective_display
)
1152 && XINT (current_buffer
->selective_display
) > 0
1153 ? (beg_unchanged
>= tlbufpos
1156 && end_unchanged
>= tlendpos
1157 && Z
- GPT
>= tlendpos
)))
1159 int tlbufpos_byte
= CHAR_TO_BYTE (tlbufpos
);
1160 if (tlbufpos
> BEGV
&& FETCH_BYTE (tlbufpos_byte
- 1) != '\n'
1162 || FETCH_BYTE (tlbufpos_byte
) == '\n'))
1163 /* Former continuation line has disappeared by becoming empty */
1165 else if (XFASTINT (w
->last_modified
) < MODIFF
1166 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
1167 || MINI_WINDOW_P (w
))
1169 /* We have to handle the case of continuation around a
1170 wide-column character (See the comment in indent.c around
1173 For instance, in the following case:
1175 -------- Insert --------
1176 K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars.
1177 J_I_ ==> J_I_ `^^' are cursors.
1181 As we have to redraw the line above, we should goto cancel. */
1183 struct position val
;
1185 int opoint
= PT
, opoint_byte
= PT_BYTE
;
1187 scan_newline (tlbufpos
, tlbufpos_byte
, BEGV
, BEGV_BYTE
, -1, 1);
1189 val
= *compute_motion (PT
, 0,
1190 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1193 1 << (BITS_PER_SHORT
- 1),
1194 1 << (BITS_PER_SHORT
- 1),
1195 window_internal_width (w
) - 1,
1196 XINT (w
->hscroll
), 0, w
);
1197 SET_PT_BOTH (opoint
, opoint_byte
);
1198 if (val
.hpos
!= this_line_start_hpos
)
1202 overlay_arrow_seen
= 0;
1203 zv_strings_seen
= 0;
1204 display_text_line (w
, tlbufpos
, tlbufpos_byte
,
1205 this_line_vpos
, this_line_start_hpos
,
1206 pos_tab_offset (w
, tlbufpos
, tlbufpos_byte
), 0);
1207 /* If line contains point, is not continued,
1208 and ends at same distance from eob as before, we win */
1209 if (cursor_vpos
>= 0 && this_line_bufpos
1210 && this_line_endpos
== tlendpos
)
1212 /* If this is not the window's last line,
1213 we must adjust the charstarts of the lines below. */
1214 if (this_line_vpos
+ 1
1215 < XFASTINT (w
->top
) + window_internal_height (w
))
1217 int left
= WINDOW_LEFT_MARGIN (w
);
1218 int *charstart_next_line
1219 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[this_line_vpos
+ 1];
1222 if (Z
- tlendpos
== ZV
)
1223 /* This line ends at end of (accessible part of) buffer.
1224 There is no newline to count. */
1225 adjust
= Z
- tlendpos
- charstart_next_line
[left
];
1227 /* This line ends in a newline.
1228 Must take account of the newline and the rest of the
1229 text that follows. */
1230 adjust
= Z
- tlendpos
+ 1 - charstart_next_line
[left
];
1232 adjust_window_charstarts (w
, this_line_vpos
, adjust
);
1235 if (!WINDOW_FULL_WIDTH_P (w
))
1236 preserve_other_columns (w
);
1242 else if (PT
== XFASTINT (w
->last_point
)
1243 /* Make sure the cursor was last displayed
1244 in this window. Otherwise we have to reposition it. */
1245 && XINT (w
->top
) <= FRAME_CURSOR_Y (selected_frame
)
1246 && (XINT (w
->top
) + XINT (w
->height
)
1247 > FRAME_CURSOR_Y (selected_frame
)))
1251 do_pending_window_change ();
1256 /* If highlighting the region, or if the cursor is in the echo area,
1257 then we can't just move the cursor. */
1258 else if (! (!NILP (Vtransient_mark_mode
)
1259 && !NILP (current_buffer
->mark_active
))
1260 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1261 || highlight_nonselected_windows
)
1262 && NILP (w
->region_showing
)
1263 && !cursor_in_echo_area
)
1265 pos
= *compute_motion (tlbufpos
, 0,
1266 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1268 PT
, 2, - (1 << (BITS_PER_SHORT
- 1)),
1269 window_internal_width (w
) - 1,
1271 pos_tab_offset (w
, tlbufpos
, tlbufpos_byte
),
1275 int width
= window_internal_width (w
) - 1;
1276 FRAME_CURSOR_X (selected_frame
)
1277 = WINDOW_LEFT_MARGIN (w
) + minmax (0, pos
.hpos
, width
);
1278 FRAME_CURSOR_Y (selected_frame
) = this_line_vpos
;
1285 /* Text changed drastically or point moved off of line */
1286 cancel_line (this_line_vpos
, selected_frame
);
1289 this_line_bufpos
= 0;
1290 all_windows
|= buffer_shared
> 1;
1292 clear_face_cache_count
++;
1296 Lisp_Object tail
, frame
;
1299 /* Clear the face cache, only when we do a full redisplay
1300 and not too often either. */
1301 if (clear_face_cache_count
> 1000)
1303 clear_face_cache ();
1304 clear_face_cache_count
= 0;
1308 /* Recompute # windows showing selected buffer.
1309 This will be incremented each time such a window is displayed. */
1312 FOR_EACH_FRAME (tail
, frame
)
1314 FRAME_PTR f
= XFRAME (frame
);
1315 if (FRAME_WINDOW_P (f
) || f
== selected_frame
)
1318 /* Mark all the scroll bars to be removed; we'll redeem the ones
1319 we want when we redisplay their windows. */
1320 if (condemn_scroll_bars_hook
)
1321 (*condemn_scroll_bars_hook
) (f
);
1323 if (FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
1324 redisplay_windows (FRAME_ROOT_WINDOW (f
), preserve_echo_area
);
1326 /* Any scroll bars which redisplay_windows should have nuked
1327 should now go away. */
1328 if (judge_scroll_bars_hook
)
1329 (*judge_scroll_bars_hook
) (f
);
1333 else if (FRAME_VISIBLE_P (selected_frame
) && !FRAME_OBSCURED_P (selected_frame
))
1335 redisplay_window (selected_window
, 1, preserve_echo_area
);
1336 if (!WINDOW_FULL_WIDTH_P (w
))
1337 preserve_other_columns (w
);
1341 /* Prevent various kinds of signals during display update.
1342 stdio is not robust about handling signals,
1343 which can cause an apparent I/O error. */
1344 if (interrupt_input
)
1354 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1358 if (!FRAMEP (XCONS (tail
)->car
))
1361 f
= XFRAME (XCONS (tail
)->car
);
1363 if ((FRAME_WINDOW_P (f
) || f
== selected_frame
)
1364 && FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
1366 pause
|= update_frame (f
, 0, 0);
1369 mark_window_display_accurate (f
->root_window
, 1);
1370 if (frame_up_to_date_hook
!= 0)
1371 (*frame_up_to_date_hook
) (f
);
1378 if (FRAME_VISIBLE_P (selected_frame
) && !FRAME_OBSCURED_P (selected_frame
))
1379 pause
= update_frame (selected_frame
, 0, 0);
1383 /* We may have called echo_area_display at the top of this
1384 function. If the echo area is on another frame, that may
1385 have put text on a frame other than the selected one, so the
1386 above call to update_frame would not have caught it. Catch
1389 Lisp_Object mini_window
;
1390 FRAME_PTR mini_frame
;
1392 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
1393 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
1395 if (mini_frame
!= selected_frame
&& FRAME_WINDOW_P (mini_frame
))
1396 pause
|= update_frame (mini_frame
, 0, 0);
1400 /* If frame does not match, prevent doing single-line-update next time.
1401 Also, don't forget to check every line to update the arrow. */
1404 this_line_bufpos
= 0;
1405 if (!NILP (last_arrow_position
))
1407 last_arrow_position
= Qt
;
1408 last_arrow_string
= Qt
;
1410 /* If we pause after scrolling, some lines in current_frame
1411 may be null, so preserve_other_columns won't be able to
1412 preserve all the vertical-bar separators. So, avoid using it
1414 if (!WINDOW_FULL_WIDTH_P (w
))
1415 update_mode_lines
= 1;
1418 /* Now text on frame agrees with windows, so
1419 put info into the windows for partial redisplay to follow */
1423 register struct buffer
*b
= XBUFFER (w
->buffer
);
1425 blank_end_of_window
= 0;
1426 unchanged_modified
= BUF_MODIFF (b
);
1427 overlay_unchanged_modified
= BUF_OVERLAY_MODIFF (b
);
1428 beg_unchanged
= BUF_GPT (b
) - BUF_BEG (b
);
1429 end_unchanged
= BUF_Z (b
) - BUF_GPT (b
);
1431 XSETFASTINT (w
->last_point
, BUF_PT (b
));
1432 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (selected_frame
));
1433 XSETFASTINT (w
->last_point_y
, FRAME_CURSOR_Y (selected_frame
));
1436 mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame
), 1);
1439 b
->clip_changed
= 0;
1440 w
->update_mode_line
= Qnil
;
1441 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
1442 XSETFASTINT (w
->last_overlay_modified
, BUF_OVERLAY_MODIFF (b
));
1444 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1447 /* Record if we are showing a region, so can make sure to
1448 update it fully at next redisplay. */
1449 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1450 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1451 || highlight_nonselected_windows
)
1452 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1453 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1456 w
->window_end_valid
= w
->buffer
;
1457 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1458 last_arrow_string
= Voverlay_arrow_string
;
1459 if (do_verify_charstarts
)
1460 verify_charstarts (w
);
1461 if (frame_up_to_date_hook
!= 0)
1462 (*frame_up_to_date_hook
) (selected_frame
);
1464 update_mode_lines
= 0;
1465 windows_or_buffers_changed
= 0;
1468 /* Start SIGIO interrupts coming again.
1469 Having them off during the code above
1470 makes it less likely one will discard output,
1471 but not impossible, since there might be stuff
1472 in the system buffer here.
1473 But it is much hairier to try to do anything about that. */
1475 if (interrupt_input
)
1479 /* If something has become visible now which was not before,
1480 redisplay again, so that we get them. */
1483 Lisp_Object tail
, frame
;
1486 FOR_EACH_FRAME (tail
, frame
)
1488 int this_is_visible
= 0;
1490 if (XFRAME (frame
)->visible
)
1491 this_is_visible
= 1;
1492 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1493 if (XFRAME (frame
)->visible
)
1494 this_is_visible
= 1;
1496 if (this_is_visible
)
1500 if (new_count
!= number_of_visible_frames
)
1501 windows_or_buffers_changed
++;
1504 /* Change frame size now if a change is pending. */
1505 do_pending_window_change ();
1507 /* If we just did a pending size change, or have additional
1508 visible frames, redisplay again. */
1509 if (windows_or_buffers_changed
&& !pause
)
1513 /* Redisplay, but leave alone any recent echo area message
1514 unless another message has been requested in its place.
1516 This is useful in situations where you need to redisplay but no
1517 user action has occurred, making it inappropriate for the message
1518 area to be cleared. See tracking_off and
1519 wait_reading_process_input for examples of these situations. */
1522 redisplay_preserve_echo_area ()
1524 if (echo_area_glyphs
== 0 && previous_echo_glyphs
!= 0)
1526 echo_area_glyphs
= previous_echo_glyphs
;
1527 redisplay_internal (1);
1528 echo_area_glyphs
= 0;
1531 redisplay_internal (1);
1535 mark_window_display_accurate (window
, flag
)
1539 register struct window
*w
;
1541 for (;!NILP (window
); window
= w
->next
)
1543 if (!WINDOWP (window
)) abort ();
1544 w
= XWINDOW (window
);
1546 if (!NILP (w
->buffer
))
1548 XSETFASTINT (w
->last_modified
,
1549 !flag
? 0 : BUF_MODIFF (XBUFFER (w
->buffer
)));
1550 XSETFASTINT (w
->last_overlay_modified
,
1551 !flag
? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w
->buffer
)));
1553 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1556 /* Record if we are showing a region, so can make sure to
1557 update it fully at next redisplay. */
1558 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1559 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1560 || highlight_nonselected_windows
)
1561 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1562 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1566 w
->window_end_valid
= w
->buffer
;
1567 w
->update_mode_line
= Qnil
;
1568 if (!NILP (w
->buffer
) && flag
)
1569 XBUFFER (w
->buffer
)->clip_changed
= 0;
1571 if (!NILP (w
->vchild
))
1572 mark_window_display_accurate (w
->vchild
, flag
);
1573 if (!NILP (w
->hchild
))
1574 mark_window_display_accurate (w
->hchild
, flag
);
1579 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1580 last_arrow_string
= Voverlay_arrow_string
;
1584 /* t is unequal to any useful value of Voverlay_arrow_... */
1585 last_arrow_position
= Qt
;
1586 last_arrow_string
= Qt
;
1590 /* Update the menu bar item list for frame F.
1591 This has to be done before we start to fill in any display lines,
1592 because it can call eval.
1594 If SAVE_MATCH_DATA is 1, we must save and restore it here. */
1597 update_menu_bar (f
, save_match_data
)
1599 int save_match_data
;
1601 struct buffer
*old
= current_buffer
;
1603 register struct window
*w
;
1605 window
= FRAME_SELECTED_WINDOW (f
);
1606 w
= XWINDOW (window
);
1608 if (update_mode_lines
)
1609 w
->update_mode_line
= Qt
;
1611 if (FRAME_WINDOW_P (f
)
1613 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1614 FRAME_EXTERNAL_MENU_BAR (f
)
1616 FRAME_MENU_BAR_LINES (f
) > 0
1618 : FRAME_MENU_BAR_LINES (f
) > 0)
1620 /* If the user has switched buffers or windows, we need to
1621 recompute to reflect the new bindings. But we'll
1622 recompute when update_mode_lines is set too; that means
1623 that people can use force-mode-line-update to request
1624 that the menu bar be recomputed. The adverse effect on
1625 the rest of the redisplay algorithm is about the same as
1626 windows_or_buffers_changed anyway. */
1627 if (windows_or_buffers_changed
1628 || !NILP (w
->update_mode_line
)
1629 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1630 < BUF_MODIFF (XBUFFER (w
->buffer
)))
1631 != !NILP (w
->last_had_star
))
1632 || ((!NILP (Vtransient_mark_mode
)
1633 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1634 != !NILP (w
->region_showing
)))
1636 struct buffer
*prev
= current_buffer
;
1637 int count
= specpdl_ptr
- specpdl
;
1639 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1640 if (save_match_data
)
1641 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
1642 if (NILP (Voverriding_local_map_menu_flag
))
1644 specbind (Qoverriding_terminal_local_map
, Qnil
);
1645 specbind (Qoverriding_local_map
, Qnil
);
1648 /* Run the Lucid hook. */
1649 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
1650 /* If it has changed current-menubar from previous value,
1651 really recompute the menubar from the value. */
1652 if (! NILP (Vlucid_menu_bar_dirty_flag
))
1653 call0 (Qrecompute_lucid_menubar
);
1654 safe_run_hooks (Qmenu_bar_update_hook
);
1655 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
1656 /* Redisplay the menu bar in case we changed it. */
1657 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1658 if (FRAME_WINDOW_P (f
))
1659 set_frame_menubar (f
, 0, 0);
1661 /* On a terminal screen, the menu bar is an ordinary screen
1662 line, and this makes it get updated. */
1663 w
->update_mode_line
= Qt
;
1664 #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1665 /* In the non-toolkit version, the menu bar is an ordinary screen
1666 line, and this makes it get updated. */
1667 w
->update_mode_line
= Qt
;
1668 #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1670 unbind_to (count
, Qnil
);
1671 set_buffer_internal_1 (prev
);
1678 /* Redisplay WINDOW and its subwindows and siblings. */
1681 redisplay_windows (window
, preserve_echo_area
)
1683 int preserve_echo_area
;
1685 for (; !NILP (window
); window
= XWINDOW (window
)->next
)
1686 redisplay_window (window
, 0, preserve_echo_area
);
1689 /* Return value in display table DP (Lisp_Char_Table *) for character
1690 C. Since a display table doesn't have any parent, we don't have to
1691 follow parent. Do not call this function directly but use the
1692 macro DISP_CHAR_VECTOR. */
1694 disp_char_vector (dp
, c
)
1695 struct Lisp_Char_Table
*dp
;
1701 if (SINGLE_BYTE_CHAR_P (c
)) return (dp
->contents
[c
]);
1703 SPLIT_NON_ASCII_CHAR (c
, code
[0], code
[1], code
[2]);
1704 if (code
[0] != CHARSET_COMPOSITION
)
1706 if (code
[1] < 32) code
[1] = -1;
1707 else if (code
[2] < 32) code
[2] = -1;
1709 /* Here, the possible range of CODE[0] (== charset ID) is
1710 128..MAX_CHARSET. Since the top level char table contains data
1711 for multibyte characters after 256th element, we must increment
1712 CODE[0] by 128 to get a correct index. */
1714 code
[3] = -1; /* anchor */
1716 for (i
= 0; code
[i
] >= 0; i
++, dp
= XCHAR_TABLE (val
))
1718 val
= dp
->contents
[code
[i
]];
1719 if (!SUB_CHAR_TABLE_P (val
))
1720 return (NILP (val
) ? dp
->defalt
: val
);
1722 /* Here, VAL is a sub char table. We return the default value of it. */
1723 return (dp
->defalt
);
1726 /* Redisplay window WINDOW and its subwindows. */
1729 redisplay_window (window
, just_this_one
, preserve_echo_area
)
1731 int just_this_one
, preserve_echo_area
;
1733 register struct window
*w
= XWINDOW (window
);
1734 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
1737 int lpoint_byte
= PT_BYTE
;
1738 struct buffer
*old
= current_buffer
;
1739 register int width
= window_internal_width (w
) - 1;
1740 register int startp
, startp_byte
;
1741 register int hscroll
= XINT (w
->hscroll
);
1742 struct position pos
;
1744 int opoint_byte
= PT_BYTE
;
1746 int update_mode_line
;
1747 struct Lisp_Char_Table
*dp
= window_display_table (w
);
1748 int really_switched_buffer
= 0;
1749 int count
= specpdl_ptr
- specpdl
;
1751 if (Z
== Z_BYTE
&& lpoint
!= lpoint_byte
)
1753 if (lpoint_byte
< lpoint
)
1756 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1758 /* If this is a combination window, do its children; that's all. */
1760 if (!NILP (w
->vchild
))
1762 redisplay_windows (w
->vchild
, preserve_echo_area
);
1765 if (!NILP (w
->hchild
))
1767 redisplay_windows (w
->hchild
, preserve_echo_area
);
1770 if (NILP (w
->buffer
))
1773 specbind (Qinhibit_point_motion_hooks
, Qt
);
1775 height
= window_internal_height (w
);
1776 update_mode_line
= (!NILP (w
->update_mode_line
) || update_mode_lines
);
1777 if (XBUFFER (w
->buffer
)->clip_changed
)
1778 update_mode_line
= 1;
1780 if (MINI_WINDOW_P (w
))
1782 if (w
== XWINDOW (echo_area_window
) && echo_area_glyphs
)
1783 /* We've already displayed the echo area glyphs in this window. */
1784 goto finish_scroll_bars
;
1785 else if (w
!= XWINDOW (minibuf_window
))
1787 /* This is a minibuffer, but it's not the currently active one,
1789 int vpos
= XFASTINT (w
->top
);
1792 for (i
= 0; i
< height
; i
++)
1794 get_display_line (f
, vpos
+ i
, 0);
1795 display_string (w
, vpos
+ i
, "", 0,
1796 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
1800 goto finish_scroll_bars
;
1804 /* Otherwise set up data on this window; select its buffer and point value */
1806 if (update_mode_line
)
1807 /* Really select the buffer, for the sake of buffer-local variables. */
1809 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1810 really_switched_buffer
= 1;
1813 set_buffer_temp (XBUFFER (w
->buffer
));
1816 opoint_byte
= PT_BYTE
;
1818 if (Z
== Z_BYTE
&& opoint
!= opoint_byte
)
1820 if (opoint_byte
< opoint
)
1823 /* If %c is in mode line, update it if needed. */
1824 if (!NILP (w
->column_number_displayed
)
1825 /* This alternative quickly identifies a common case
1826 where no change is needed. */
1827 && !(PT
== XFASTINT (w
->last_point
)
1828 && XFASTINT (w
->last_modified
) >= MODIFF
1829 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1830 && XFASTINT (w
->column_number_displayed
) != current_column ())
1831 update_mode_line
= 1;
1833 /* Count number of windows showing the selected buffer.
1834 An indirect buffer counts as its base buffer. */
1838 struct buffer
*current_base
, *window_base
;
1839 current_base
= current_buffer
;
1840 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
1841 if (current_base
->base_buffer
)
1842 current_base
= current_base
->base_buffer
;
1843 if (window_base
->base_buffer
)
1844 window_base
= window_base
->base_buffer
;
1845 if (current_base
== window_base
)
1849 /* POINT refers normally to the selected window.
1850 For any other window, set up appropriate value. */
1852 if (!EQ (window
, selected_window
))
1854 int new_pt
= XMARKER (w
->pointm
)->charpos
;
1855 int new_pt_byte
= marker_byte_position (w
->pointm
);
1859 new_pt_byte
= BEGV_BYTE
;
1860 set_marker_both (w
->pointm
, Qnil
, BEGV
, BEGV_BYTE
);
1862 else if (new_pt
> (ZV
- 1))
1865 new_pt_byte
= ZV_BYTE
;
1866 set_marker_both (w
->pointm
, Qnil
, ZV
, ZV_BYTE
);
1868 /* We don't use SET_PT so that the point-motion hooks don't run. */
1869 TEMP_SET_PT_BOTH (new_pt
, new_pt_byte
);
1872 /* If any of the character widths specified in the display table
1873 have changed, invalidate the width run cache. It's true that this
1874 may be a bit late to catch such changes, but the rest of
1875 redisplay goes (non-fatally) haywire when the display table is
1876 changed, so why should we worry about doing any better? */
1877 if (current_buffer
->width_run_cache
)
1879 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
1881 if (! disptab_matches_widthtab (disptab
,
1882 XVECTOR (current_buffer
->width_table
)))
1884 invalidate_region_cache (current_buffer
,
1885 current_buffer
->width_run_cache
,
1887 recompute_width_table (current_buffer
, disptab
);
1891 /* If window-start is screwed up, choose a new one. */
1892 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
1895 startp
= marker_position (w
->start
);
1896 startp_byte
= marker_byte_position (w
->start
);
1898 /* If someone specified a new starting point but did not insist,
1899 check whether it can be used. */
1900 if (!NILP (w
->optional_new_start
))
1902 w
->optional_new_start
= Qnil
;
1903 /* Check whether this start pos is usable given where point is. */
1905 pos
= *compute_motion (startp
, 0,
1906 (((EQ (window
, minibuf_window
)
1908 ? minibuf_prompt_width
: 0)
1909 + (hscroll
? 1 - hscroll
: 0)),
1912 /* BUG FIX: See the comment of
1913 Fpos_visible_in_window_p (window.c). */
1914 - (1 << (BITS_PER_SHORT
- 1)),
1916 pos_tab_offset (w
, startp
, startp_byte
), w
);
1917 /* If PT does fit on the screen, we will use this start pos,
1918 so do so by setting force_start. */
1919 if (pos
.bufpos
== PT
)
1920 w
->force_start
= Qt
;
1923 /* Handle case where place to start displaying has been specified,
1924 unless the specified location is outside the accessible range. */
1925 if (!NILP (w
->force_start
))
1927 w
->force_start
= Qnil
;
1928 /* Forget any recorded base line for line number display. */
1929 w
->base_line_number
= Qnil
;
1930 /* Redisplay the mode line. Select the buffer properly for that.
1931 Also, run the hook window-scroll-functions
1932 because we have scrolled. */
1933 /* Note, we do this after clearing force_start because
1934 if there's an error, it is better to forget about force_start
1935 than to get into an infinite loop calling the hook functions
1936 and having them get more errors. */
1937 if (!update_mode_line
1938 || ! NILP (Vwindow_scroll_functions
))
1940 Lisp_Object temp
[3];
1942 if (!really_switched_buffer
)
1944 set_buffer_temp (old
);
1945 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1947 really_switched_buffer
= 1;
1948 update_mode_line
= 1;
1949 w
->update_mode_line
= Qt
;
1950 if (! NILP (Vwindow_scroll_functions
))
1952 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1953 make_number (startp
));
1954 startp
= marker_position (w
->start
);
1955 startp_byte
= marker_byte_position (w
->start
);
1958 XSETFASTINT (w
->last_modified
, 0);
1959 XSETFASTINT (w
->last_overlay_modified
, 0);
1960 if (startp
< BEGV
) startp
= BEGV
, startp_byte
= BEGV_BYTE
;
1961 if (startp
> ZV
) startp
= ZV
, startp
= ZV_BYTE
;
1962 try_window (window
, startp
);
1963 if (cursor_vpos
< 0)
1965 /* If point does not appear, move point so it does appear */
1966 pos
= *compute_motion (startp
, 0,
1967 (((EQ (window
, minibuf_window
)
1969 ? minibuf_prompt_width
: 0)
1970 + (hscroll
? 1 - hscroll
: 0)),
1973 - (1 << (BITS_PER_SHORT
- 1)),
1975 pos_tab_offset (w
, startp
, startp_byte
),
1977 TEMP_SET_PT_BOTH (pos
.bufpos
, pos
.bytepos
);
1978 if (w
!= XWINDOW (selected_window
))
1979 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
1982 if (current_buffer
== old
)
1985 lpoint_byte
= PT_BYTE
;
1987 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
1988 + minmax (0, pos
.hpos
, width
));
1989 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1991 /* If we are highlighting the region,
1992 then we just changed the region, so redisplay to show it. */
1993 if (!NILP (Vtransient_mark_mode
)
1994 && !NILP (current_buffer
->mark_active
))
1996 cancel_my_columns (XWINDOW (window
));
1997 try_window (window
, startp
);
2003 /* Handle case where text has not changed, only point,
2004 and it has not moved off the frame. */
2006 /* This code is not used for minibuffer for the sake of
2007 the case of redisplaying to replace an echo area message;
2008 since in that case the minibuffer contents per se are usually unchanged.
2009 This code is of no real use in the minibuffer since
2010 the handling of this_line_bufpos, etc.,
2011 in redisplay handles the same cases. */
2013 if (XFASTINT (w
->last_modified
) >= MODIFF
2014 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
2015 && PT
>= startp
&& !current_buffer
->clip_changed
2016 && (just_this_one
|| WINDOW_FULL_WIDTH_P (w
))
2017 /* If force-mode-line-update was called, really redisplay;
2018 that's how redisplay is forced after e.g. changing
2019 buffer-invisibility-spec. */
2020 && NILP (w
->update_mode_line
)
2021 /* Can't use this case if highlighting a region. */
2022 && !(!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
2023 && NILP (w
->region_showing
)
2024 /* If end pos is out of date, scroll bar and percentage will be wrong */
2025 && INTEGERP (w
->window_end_vpos
)
2026 && XFASTINT (w
->window_end_vpos
) < XFASTINT (w
->height
)
2027 && !EQ (window
, minibuf_window
)
2028 && (!MARKERP (Voverlay_arrow_position
)
2029 || current_buffer
!= XMARKER (Voverlay_arrow_position
)->buffer
))
2031 /* All positions in this clause are relative to the window edge. */
2033 int this_scroll_margin
= scroll_margin
;
2034 int last_point_y
= XFASTINT (w
->last_point_y
) - XINT (w
->top
);
2035 int last_point_x
= (XFASTINT (w
->last_point_x
) - WINDOW_LEFT_MARGIN (w
));
2037 /* Find where PT is located now on the frame. */
2038 /* Check just_this_one as a way of verifying that the
2039 window edges have not changed. */
2040 if (PT
== XFASTINT (w
->last_point
) && just_this_one
)
2042 pos
.hpos
= last_point_x
;
2043 pos
.vpos
= last_point_y
;
2046 else if (PT
> XFASTINT (w
->last_point
)
2047 && XFASTINT (w
->last_point
) > startp
&& just_this_one
2048 /* We can't use this if point is in the left margin of a
2049 hscrolled window, because w->last_point_x has been
2050 clipped to the window edges. */
2051 && !(last_point_x
<= 0 && hscroll
))
2053 int last_point
= XFASTINT (w
->last_point
);
2054 int last_point_byte
= CHAR_TO_BYTE (last_point
);
2055 int tab_offset
= (pos_tab_offset (w
, last_point
, last_point_byte
)
2056 - (last_point_x
+ hscroll
- !! hscroll
));
2058 pos
= *compute_motion (last_point
, last_point_y
, last_point_x
, 0,
2060 /* BUG FIX: See the comment of
2061 Fpos_visible_in_window_p (window.c). */
2062 - (1 << (BITS_PER_SHORT
- 1)),
2069 pos
= *compute_motion (startp
, 0, (hscroll
? 1 - hscroll
: 0), 0,
2071 /* BUG FIX: See the comment of
2072 Fpos_visible_in_window_p (window.c). */
2073 - (1 << (BITS_PER_SHORT
- 1)),
2075 pos_tab_offset (w
, startp
, startp_byte
),
2079 /* Don't use a scroll margin that is negative or too large. */
2080 if (this_scroll_margin
< 0)
2081 this_scroll_margin
= 0;
2083 if (XINT (w
->height
) < 4 * scroll_margin
)
2084 this_scroll_margin
= XINT (w
->height
) / 4;
2086 /* If point fits on the screen, and not within the scroll margin,
2088 if (pos
.vpos
< height
- this_scroll_margin
2089 && (pos
.vpos
>= this_scroll_margin
|| startp
== BEGV
))
2091 /* Ok, point is still on frame */
2092 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
2094 /* These variables are supposed to be origin 1 */
2095 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
2096 + minmax (0, pos
.hpos
, width
));
2097 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
2099 /* This doesn't do the trick, because if a window to the right of
2100 this one must be redisplayed, this does nothing because there
2101 is nothing in DesiredFrame yet, and then the other window is
2102 redisplayed, making likes that are empty in this window's columns.
2103 if (WINDOW_FULL_WIDTH_P (w))
2104 preserve_my_columns (w);
2106 if (current_buffer
->clip_changed
2107 && ! NILP (Vwindow_scroll_functions
))
2108 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2109 make_number (marker_position (w
->start
)));
2113 /* Don't bother trying redisplay with same start;
2114 we already know it will lose */
2116 /* If current starting point was originally the beginning of a line
2117 but no longer is, find a new starting point. */
2118 else if (!NILP (w
->start_at_line_beg
)
2120 || FETCH_BYTE (startp_byte
- 1) == '\n'))
2124 else if (just_this_one
&& !MINI_WINDOW_P (w
)
2126 && XFASTINT (w
->last_modified
)
2127 /* or else vmotion on first line won't work. */
2128 && ! NILP (w
->start_at_line_beg
)
2129 && ! EQ (w
->window_end_valid
, Qnil
)
2130 && do_id
&& !current_buffer
->clip_changed
2131 && !blank_end_of_window
2132 && WINDOW_FULL_WIDTH_P (w
)
2133 /* Can't use this case if highlighting a region. */
2134 && !(!NILP (Vtransient_mark_mode
)
2135 && !NILP (current_buffer
->mark_active
))
2136 /* Don't use try_window_id if newline
2137 doesn't display as the end of a line. */
2138 && !(dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, '\n')))
2139 && NILP (w
->region_showing
)
2140 && EQ (last_arrow_position
, COERCE_MARKER (Voverlay_arrow_position
))
2141 && EQ (last_arrow_string
, Voverlay_arrow_string
)
2142 && (tem
= try_window_id (FRAME_SELECTED_WINDOW (f
)))
2145 /* tem > 0 means success. tem == -1 means choose new start.
2146 tem == -2 means try again with same start,
2147 and nothing but whitespace follows the changed stuff.
2148 tem == 0 means try again with same start. */
2152 else if (startp
>= BEGV
&& startp
<= ZV
2154 /* Avoid starting at end of buffer. */
2155 #if 0 /* This change causes trouble for M-! finger & RET.
2156 It will have to be considered later. */
2157 || ! EQ (window
, selected_window
)
2158 /* Don't do the recentering if redisplay
2159 is not for no user action. */
2160 || preserve_echo_area
2163 || (XFASTINT (w
->last_modified
) >= MODIFF
2164 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
2166 /* Try to redisplay starting at same place as before */
2167 /* If point has not moved off frame, accept the results */
2168 try_window (window
, startp
);
2169 if (cursor_vpos
>= 0)
2171 if (!just_this_one
|| current_buffer
->clip_changed
2172 || beg_unchanged
< startp
)
2173 /* Forget any recorded base line for line number display. */
2174 w
->base_line_number
= Qnil
;
2176 if (current_buffer
->clip_changed
2177 && ! NILP (Vwindow_scroll_functions
))
2178 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2179 make_number (marker_position (w
->start
)));
2184 cancel_my_columns (w
);
2187 XSETFASTINT (w
->last_modified
, 0);
2188 XSETFASTINT (w
->last_overlay_modified
, 0);
2189 /* Redisplay the mode line. Select the buffer properly for that. */
2190 if (!update_mode_line
)
2192 if (!really_switched_buffer
)
2194 set_buffer_temp (old
);
2195 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2197 update_mode_line
= 1;
2198 w
->update_mode_line
= Qt
;
2201 /* Try to scroll by specified few lines */
2203 if (scroll_conservatively
&& !current_buffer
->clip_changed
2204 && startp
>= BEGV
&& startp
<= ZV
)
2206 int this_scroll_margin
= scroll_margin
;
2207 int scroll_margin_pos
, scroll_margin_bytepos
;
2209 /* Don't use a scroll margin that is negative or too large. */
2210 if (this_scroll_margin
< 0)
2211 this_scroll_margin
= 0;
2213 if (XINT (w
->height
) < 4 * this_scroll_margin
)
2214 this_scroll_margin
= XINT (w
->height
) / 4;
2216 scroll_margin_pos
= Z
- XFASTINT (w
->window_end_pos
);
2217 if (this_scroll_margin
)
2219 pos
= *vmotion (scroll_margin_pos
, -this_scroll_margin
, w
);
2220 scroll_margin_pos
= pos
.bufpos
;
2221 scroll_margin_bytepos
= pos
.bytepos
;
2224 scroll_margin_bytepos
= CHAR_TO_BYTE (scroll_margin_pos
);
2226 if (PT
>= scroll_margin_pos
)
2228 struct position pos
;
2229 pos
= *compute_motion (scroll_margin_pos
, 0, 0, 0,
2230 PT
, XFASTINT (w
->height
), 0,
2231 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2232 pos_tab_offset (w
, scroll_margin_pos
,
2233 scroll_margin_bytepos
),
2235 if (pos
.vpos
> scroll_conservatively
)
2238 pos
= *vmotion (startp
, pos
.vpos
+ 1, w
);
2240 if (! NILP (Vwindow_scroll_functions
))
2242 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2243 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2244 make_number (pos
.bufpos
));
2245 pos
.bufpos
= marker_position (w
->start
);
2247 try_window (window
, pos
.bufpos
);
2248 if (cursor_vpos
>= 0)
2250 if (!just_this_one
|| current_buffer
->clip_changed
2251 || beg_unchanged
< startp
)
2252 /* Forget any recorded base line for line number display. */
2253 w
->base_line_number
= Qnil
;
2257 cancel_my_columns (w
);
2260 scroll_margin_pos
= startp
;
2261 if (this_scroll_margin
)
2263 pos
= *vmotion (scroll_margin_pos
, this_scroll_margin
, w
);
2264 scroll_margin_pos
= pos
.bufpos
;
2266 if (PT
< scroll_margin_pos
)
2268 struct position pos
;
2269 pos
= *compute_motion (PT
, 0, 0, 0,
2270 scroll_margin_pos
, XFASTINT (w
->height
), 0,
2271 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2272 pos_tab_offset (w
, PT
, PT_BYTE
),
2274 if (pos
.vpos
> scroll_conservatively
)
2277 pos
= *vmotion (startp
, -pos
.vpos
, w
);
2279 if (! NILP (Vwindow_scroll_functions
))
2281 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2282 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2283 make_number (pos
.bufpos
));
2284 pos
.bufpos
= marker_position (w
->start
);
2286 try_window (window
, pos
.bufpos
);
2287 if (cursor_vpos
>= 0)
2289 if (!just_this_one
|| current_buffer
->clip_changed
2290 || beg_unchanged
< startp
)
2291 /* Forget any recorded base line for line number display. */
2292 w
->base_line_number
= Qnil
;
2296 cancel_my_columns (w
);
2301 if (scroll_step
&& !current_buffer
->clip_changed
2302 && startp
>= BEGV
&& startp
<= ZV
)
2306 pos
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), scroll_step
, w
);
2307 if (pos
.vpos
>= height
)
2311 pos
= *vmotion (startp
, (PT
< startp
? - scroll_step
: scroll_step
), w
);
2313 if (PT
>= pos
.bufpos
)
2315 if (! NILP (Vwindow_scroll_functions
))
2317 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2318 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2319 make_number (pos
.bufpos
));
2320 pos
.bufpos
= marker_position (w
->start
);
2322 try_window (window
, pos
.bufpos
);
2323 if (cursor_vpos
>= 0)
2325 if (!just_this_one
|| current_buffer
->clip_changed
2326 || beg_unchanged
< startp
)
2327 /* Forget any recorded base line for line number display. */
2328 w
->base_line_number
= Qnil
;
2332 cancel_my_columns (w
);
2337 /* Finally, just choose place to start which centers point */
2340 /* Forget any previously recorded base line for line number display. */
2341 w
->base_line_number
= Qnil
;
2343 pos
= *vmotion (PT
, - (height
/ 2), w
);
2345 /* The minibuffer is often just one line. Ordinary scrolling
2346 gives little overlap and looks bad. So show 20 chars before point. */
2348 && (pos
.bufpos
>= PT
- minibuffer_scroll_overlap
2349 /* If we scrolled less than 1/2 line forward, we will
2350 get too much overlap, so change to the usual amount. */
2351 || pos
.bufpos
< startp
+ width
/ 2)
2352 && PT
> BEGV
+ minibuffer_scroll_overlap
2353 /* If we scrolled to an actual line boundary,
2354 that's different; don't ignore line boundaries. */
2355 && FETCH_BYTE (pos
.bytepos
- 1) != '\n')
2357 pos
.bufpos
= PT
- minibuffer_scroll_overlap
;
2358 pos
.bytepos
= CHAR_TO_BYTE (pos
.bufpos
);
2361 /* Set startp here explicitly in case that helps avoid an infinite loop
2362 in case the window-scroll-functions functions get errors. */
2363 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2364 if (! NILP (Vwindow_scroll_functions
))
2366 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2367 make_number (pos
.bufpos
));
2368 pos
.bufpos
= marker_position (w
->start
);
2369 pos
.bytepos
= marker_byte_position (w
->start
);
2371 try_window (window
, pos
.bufpos
);
2373 startp
= marker_position (w
->start
);
2374 startp_byte
= marker_byte_position (w
->start
);
2375 w
->start_at_line_beg
2376 = (startp
== BEGV
|| FETCH_BYTE (startp_byte
- 1) == '\n') ? Qt
: Qnil
;
2379 if ((update_mode_line
2380 /* If window not full width, must redo its mode line
2381 if the window to its side is being redone */
2382 || (!just_this_one
&& !WINDOW_FULL_WIDTH_P (w
))
2383 || INTEGERP (w
->base_line_pos
)
2384 || (!NILP (w
->column_number_displayed
)
2385 && XFASTINT (w
->column_number_displayed
) != current_column ()))
2386 && height
!= XFASTINT (w
->height
))
2388 FRAME_PTR oframe
= selected_frame
;
2389 if (!really_switched_buffer
)
2391 set_buffer_temp (old
);
2392 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2393 really_switched_buffer
= 1;
2396 display_mode_line (w
);
2397 selected_frame
= oframe
;
2399 if (! line_number_displayed
2400 && ! BUFFERP (w
->base_line_pos
))
2402 w
->base_line_pos
= Qnil
;
2403 w
->base_line_number
= Qnil
;
2406 /* When we reach a frame's selected window, redo the frame's menu bar. */
2407 if (update_mode_line
2408 && (FRAME_WINDOW_P (f
)
2410 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
2411 FRAME_EXTERNAL_MENU_BAR (f
)
2413 FRAME_MENU_BAR_LINES (f
) > 0
2415 : FRAME_MENU_BAR_LINES (f
) > 0)
2416 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
2417 display_menu_bar (w
);
2420 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2422 int start
, end
, whole
;
2424 /* Calculate the start and end positions for the current window.
2425 At some point, it would be nice to choose between scrollbars
2426 which reflect the whole buffer size, with special markers
2427 indicating narrowing, and scrollbars which reflect only the
2430 Note that minibuffers sometimes aren't displaying any text. */
2431 if (! MINI_WINDOW_P (w
)
2432 || (w
== XWINDOW (minibuf_window
) && ! echo_area_glyphs
))
2435 start
= marker_position (w
->start
) - BEGV
;
2436 /* I don't think this is guaranteed to be right. For the
2437 moment, we'll pretend it is. */
2438 end
= (Z
- XINT (w
->window_end_pos
)) - BEGV
;
2440 if (end
< start
) end
= start
;
2441 if (whole
< (end
- start
)) whole
= end
- start
;
2444 start
= end
= whole
= 0;
2446 /* Indicate what this scroll bar ought to be displaying now. */
2447 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
2449 /* Note that we actually used the scroll bar attached to this window,
2450 so it shouldn't be deleted at the end of redisplay. */
2451 (*redeem_scroll_bar_hook
) (w
);
2454 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
2455 if (really_switched_buffer
)
2456 set_buffer_internal_1 (old
);
2458 set_buffer_temp (old
);
2459 TEMP_SET_PT_BOTH (lpoint
, lpoint_byte
);
2461 unbind_to (count
, Qnil
);
2464 /* Do full redisplay on one window, starting at position `pos'. */
2467 try_window (window
, pos
)
2471 register struct window
*w
= XWINDOW (window
);
2472 register int height
= window_internal_height (w
);
2473 register int vpos
= XFASTINT (w
->top
);
2474 register int last_text_vpos
= vpos
;
2475 FRAME_PTR f
= XFRAME (w
->frame
);
2476 int width
= window_internal_width (w
) - 1;
2477 struct position val
;
2479 /* POS should never be out of range! */
2480 if (pos
< XBUFFER (w
->buffer
)->begv
2481 || pos
> XBUFFER (w
->buffer
)->zv
)
2484 if (XMARKER (w
->start
)->charpos
!= pos
)
2485 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2488 overlay_arrow_seen
= 0;
2489 zv_strings_seen
= 0;
2490 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
2491 val
.ovstring_chars_done
= 0;
2492 val
.bytepos
= marker_byte_position (w
->start
);
2493 val
.tab_offset
= pos_tab_offset (w
, pos
, val
.bytepos
);
2495 while (--height
>= 0)
2497 val
= *display_text_line (w
, pos
, val
.bytepos
, vpos
,
2498 val
.hpos
, val
.tab_offset
,
2499 val
.ovstring_chars_done
);
2500 /* The following code is omitted because we maintain tab_offset
2503 tab_offset
+= width
;
2504 if (val
.vpos
) tab_offset
= 0;
2507 if (pos
!= val
.bufpos
)
2510 #ifdef USE_TEXT_PROPERTIES
2511 Lisp_Object invis_prop
;
2512 invis_prop
= Fget_char_property (make_number (val
.bufpos
- 1),
2513 Qinvisible
, window
);
2514 invis
= TEXT_PROP_MEANS_INVISIBLE (invis_prop
);
2518 /* Next line, unless prev line ended in end of buffer with no cr */
2520 && (FETCH_BYTE (val
.bytepos
- 1) != '\n' || invis
));
2525 /* If last line is continued in middle of character,
2526 include the split character in the text considered on the frame */
2527 if (val
.hpos
< (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
2530 /* If bottom just moved off end of frame, change mode line percentage. */
2531 if (XFASTINT (w
->window_end_pos
) == 0
2533 w
->update_mode_line
= Qt
;
2535 /* Say where last char on frame will be, once redisplay is finished. */
2536 XSETFASTINT (w
->window_end_pos
, Z
- pos
);
2537 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
- XFASTINT (w
->top
));
2538 /* But that is not valid info until redisplay finishes. */
2539 w
->window_end_valid
= Qnil
;
2542 /* Try to redisplay when buffer is modified locally,
2543 computing insert/delete line to preserve text outside
2544 the bounds of the changes.
2545 Return 1 if successful, 0 if if cannot tell what to do,
2546 or -1 to tell caller to find a new window start,
2547 or -2 to tell caller to do normal redisplay with same window start. */
2550 try_window_id (window
)
2554 int opoint
, opoint_byte
;
2555 register struct window
*w
= XWINDOW (window
);
2556 register int height
= window_internal_height (w
);
2557 FRAME_PTR f
= XFRAME (w
->frame
);
2558 int top
= XFASTINT (w
->top
);
2559 int start
= marker_position (w
->start
);
2560 int width
= window_internal_width (w
) - 1;
2561 int hscroll
= XINT (w
->hscroll
);
2562 int lmargin
= hscroll
> 0 ? 1 - hscroll
: 0;
2565 register int i
, tem
;
2566 int last_text_vpos
= 0;
2568 int selective
= (INTEGERP (current_buffer
->selective_display
)
2569 ? XINT (current_buffer
->selective_display
)
2570 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2571 struct position val
, bp
, ep
, xp
, pp
;
2572 int scroll_amount
= 0;
2576 int start_byte
= marker_byte_position (w
->start
);
2578 if (GPT
- BEG
< beg_unchanged
)
2579 beg_unchanged
= GPT
- BEG
;
2580 if (Z
- GPT
< end_unchanged
)
2581 end_unchanged
= Z
- GPT
;
2583 if (beg_unchanged
+ BEG
< start
)
2584 return 0; /* Give up if changes go above top of window */
2586 /* Find position before which nothing is changed. */
2587 bp
= *compute_motion (start
, 0, lmargin
, 0,
2588 min (ZV
, beg_unchanged
+ BEG
), height
,
2589 /* BUG FIX: See the comment of
2590 Fpos_visible_in_window_p (window.c). */
2591 - (1 << (BITS_PER_SHORT
- 1)),
2593 pos_tab_offset (w
, start
, start_byte
),
2595 if (bp
.vpos
>= height
)
2599 /* All changes are beyond the window end, and point is on the screen.
2600 We don't need to change the text at all.
2601 But we need to update window_end_pos to account for
2602 any change in buffer size. */
2603 bp
= *compute_motion (start
, 0, lmargin
, 0,
2605 /* BUG FIX: See the comment of
2606 Fpos_visible_in_window_p() (window.c). */
2607 - (1 << (BITS_PER_SHORT
- 1)),
2609 pos_tab_offset (w
, start
, start_byte
), w
);
2610 XSETFASTINT (w
->window_end_vpos
, height
);
2611 XSETFASTINT (w
->window_end_pos
, Z
- bp
.bufpos
);
2619 /* Find beginning of that frame line. Must display from there. */
2620 bp
= *vmotion (bp
.bufpos
, 0, w
);
2623 pos_byte
= bp
.bytepos
;
2629 /* If about to start displaying at the beginning of a continuation line,
2630 really start with previous frame line, in case it was not
2631 continued when last redisplayed */
2632 if ((bp
.contin
&& bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0)
2634 /* Likewise if we have to worry about selective display. */
2635 (selective
> 0 && bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0))
2637 bp
= *vmotion (bp
.bufpos
, -1, w
);
2640 pos_byte
= bp
.bytepos
;
2642 val
.tab_offset
= bp
.tab_offset
; /* Update tab offset. */
2644 if (bp
.contin
&& bp
.hpos
!= lmargin
)
2646 val
.hpos
= bp
.prevhpos
- width
+ lmargin
;
2647 val
.tab_offset
= bp
.tab_offset
+ bp
.prevhpos
- width
;
2649 DEC_BOTH (pos
, pos_byte
);
2654 /* Find first visible newline after which no more is changed. */
2655 opoint
= PT
, opoint_byte
= PT_BYTE
;
2656 SET_PT (Z
- max (end_unchanged
, Z
- ZV
));
2657 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2659 while (PT
< ZV
- 1 && indented_beyond_p (PT
, PT_BYTE
, selective
))
2660 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2662 SET_PT_BOTH (opoint
, opoint_byte
);
2664 /* Compute the cursor position after that newline. */
2665 ep
= *compute_motion (pos
, vpos
, val
.hpos
, did_motion
, tem
,
2666 height
, - (1 << (BITS_PER_SHORT
- 1)),
2668 /* We have tab offset in VAL, use it. */
2671 /* If changes reach past the text available on the frame,
2672 just display rest of frame. */
2673 if (ep
.bufpos
> Z
- XFASTINT (w
->window_end_pos
))
2676 stop_vpos
= ep
.vpos
;
2678 /* If no newline before ep, the line ep is on includes some changes
2679 that must be displayed. Make sure we don't stop before it. */
2680 /* Also, if changes reach all the way until ep.bufpos,
2681 it is possible that something was deleted after the
2682 newline before it, so the following line must be redrawn. */
2683 if (stop_vpos
== ep
.vpos
2684 && (ep
.bufpos
== BEGV
2685 || FETCH_BYTE (ep
.bytepos
- 1) != '\n'
2686 || ep
.bufpos
== Z
- end_unchanged
))
2687 stop_vpos
= ep
.vpos
+ 1;
2690 overlay_arrow_seen
= 0;
2691 zv_strings_seen
= 0;
2693 /* If changes do not reach to bottom of window,
2694 figure out how much to scroll the rest of the window */
2695 if (stop_vpos
< height
)
2697 /* Now determine how far up or down the rest of the window has moved */
2698 xp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2699 Z
- XFASTINT (w
->window_end_pos
),
2700 /* Don't care for VPOS... */
2701 1 << (BITS_PER_SHORT
- 1),
2703 1 << (BITS_PER_SHORT
- 1),
2704 width
, hscroll
, ep
.tab_offset
, w
);
2705 scroll_amount
= xp
.vpos
- XFASTINT (w
->window_end_vpos
);
2707 /* Is everything on frame below the changes whitespace?
2708 If so, no scrolling is really necessary. */
2709 for (i
= ep
.bytepos
; i
< xp
.bytepos
; i
++)
2711 tem
= FETCH_BYTE (i
);
2712 if (tem
!= ' ' && tem
!= '\n' && tem
!= '\t')
2715 if (i
== xp
.bytepos
)
2718 XSETFASTINT (w
->window_end_vpos
,
2719 XFASTINT (w
->window_end_vpos
) + scroll_amount
);
2721 /* Before doing any scrolling, verify that point will be on frame. */
2722 if (PT
> ep
.bufpos
&& !(PT
<= xp
.bufpos
&& xp
.vpos
< height
))
2724 if (PT
<= xp
.bufpos
)
2726 pp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2727 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2729 /* We have tab offset in EP, use it. */
2734 pp
= *compute_motion (xp
.bufpos
, xp
.vpos
, xp
.hpos
, 1,
2735 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2737 /* We have tab offset in XP, use it. */
2740 if (pp
.bufpos
< PT
|| pp
.vpos
== height
)
2742 cursor_vpos
= pp
.vpos
+ top
;
2743 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, pp
.hpos
, width
);
2746 if (stop_vpos
- scroll_amount
>= height
2747 || ep
.bufpos
== xp
.bufpos
)
2749 if (scroll_amount
< 0)
2750 stop_vpos
-= scroll_amount
;
2752 /* In this path, we have altered window_end_vpos
2753 and not left it negative.
2754 We must make sure that, in case display is preempted
2755 before the frame changes to reflect what we do here,
2756 further updates will not come to try_window_id
2757 and assume the frame and window_end_vpos match. */
2758 blank_end_of_window
= 1;
2760 else if (!scroll_amount
)
2762 /* Even if we don't need to scroll, we must adjust the
2763 charstarts of subsequent lines (that we won't redisplay)
2764 according to the amount of text inserted or deleted. */
2765 int oldpos
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2766 int adjust
= ep
.bufpos
- oldpos
;
2767 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1, adjust
);
2769 else if (bp
.bufpos
== Z
- end_unchanged
)
2771 /* If reprinting everything is nearly as fast as scrolling,
2772 don't bother scrolling. Can happen if lines are short. */
2773 if (scroll_cost (f
, bp
.vpos
+ top
- scroll_amount
,
2774 top
+ height
- max (0, scroll_amount
),
2776 > xp
.bufpos
- bp
.bufpos
- 20)
2777 /* Return "try normal display with same window-start."
2778 Too bad we can't prevent further scroll-thinking. */
2780 /* If pure deletion, scroll up as many lines as possible.
2781 In common case of killing a line, this can save the
2782 following line from being overwritten by scrolling
2783 and therefore having to be redrawn. */
2784 tem
= scroll_frame_lines (f
, bp
.vpos
+ top
- scroll_amount
,
2785 top
+ height
- max (0, scroll_amount
),
2786 scroll_amount
, bp
.bufpos
);
2791 /* scroll_frame_lines did not properly adjust subsequent
2792 lines' charstarts in the case where the text of the
2793 screen line at bp.vpos has changed.
2794 (This can happen in a deletion that ends in mid-line.)
2795 To adjust properly, we need to make things consistent
2797 So do a second adjust to make that happen.
2798 Note that stop_vpos >= ep.vpos, so it is sufficient
2799 to update the charstarts for lines at ep.vpos and below. */
2801 = FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2802 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1,
2803 ep
.bufpos
- oldstart
);
2806 else if (scroll_amount
)
2808 /* If reprinting everything is nearly as fast as scrolling,
2809 don't bother scrolling. Can happen if lines are short. */
2810 /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an
2811 overestimate of cost of reprinting, since xp.bufpos
2812 would end up below the bottom of the window. */
2813 if (scroll_cost (f
, ep
.vpos
+ top
- scroll_amount
,
2814 top
+ height
- max (0, scroll_amount
),
2816 > xp
.bufpos
- ep
.bufpos
- 20)
2817 /* Return "try normal display with same window-start."
2818 Too bad we can't prevent further scroll-thinking. */
2820 tem
= scroll_frame_lines (f
, ep
.vpos
+ top
- scroll_amount
,
2821 top
+ height
- max (0, scroll_amount
),
2822 scroll_amount
, ep
.bufpos
);
2823 if (!tem
) stop_vpos
= height
;
2827 /* In any case, do not display past bottom of window */
2828 if (stop_vpos
>= height
)
2834 /* Handle case where pos is before w->start --
2835 can happen if part of line had been clipped and is not clipped now */
2836 if (vpos
== 0 && pos
< marker_position (w
->start
))
2837 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2839 val
.bytepos
= pos_byte
;
2841 /* Redisplay the lines where the text was changed */
2842 last_text_vpos
= vpos
;
2843 /* The following code is omitted because we maintain tab offset in
2846 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2847 /* If we are starting display in mid-character, correct tab_offset
2848 to account for passing the line that that character really starts in. */
2849 if (val
.hpos
< lmargin
)
2850 tab_offset
+= width
;
2853 while (vpos
< stop_vpos
)
2855 val
= *display_text_line (w
, pos
, val
.bytepos
, top
+ vpos
++,
2856 val
.hpos
, val
.tab_offset
,
2857 val
.ovstring_chars_done
);
2858 /* If display_text_line ran a hook and changed some text,
2859 redisplay all the way to bottom of buffer
2860 So that we show the changes. */
2861 if (old_tick
!= MODIFF
)
2863 /* The following code is omitted because we maintain tab offset
2864 in val.tab_offset. */
2866 tab_offset
+= width
;
2867 if (val
.vpos
) tab_offset
= 0;
2869 if (pos
!= val
.bufpos
)
2871 /* Next line, unless prev line ended in end of buffer with no cr */
2872 = vpos
- (val
.vpos
&& FETCH_BYTE (val
.bytepos
- 1) != '\n');
2876 /* There are two cases:
2877 1) we have displayed down to the bottom of the window
2878 2) we have scrolled lines below stop_vpos by scroll_amount */
2882 /* If last line is continued in middle of character,
2883 include the split character in the text considered on the frame */
2884 if (val
.hpos
< lmargin
)
2886 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
);
2887 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2890 /* If scrolling made blank lines at window bottom,
2891 redisplay to fill those lines */
2892 if (scroll_amount
< 0)
2894 /* Don't consider these lines for general-purpose scrolling.
2895 That will save time in the scrolling computation. */
2896 FRAME_SCROLL_BOTTOM_VPOS (f
) = xp
.vpos
;
2899 pos_byte
= xp
.bytepos
;
2901 val
.tab_offset
= xp
.tab_offset
;
2903 { /* Display from next line */
2904 vpos
= height
+ scroll_amount
;
2908 else if (xp
.contin
&& xp
.hpos
!= lmargin
)
2910 val
.hpos
= xp
.prevhpos
- width
+ lmargin
;
2911 val
.tab_offset
= xp
.tab_offset
+ bp
.prevhpos
- width
;
2912 DEC_BOTH (pos
, pos_byte
);
2915 blank_end_of_window
= 1;
2916 /* The following code is omitted because we maintain tab offset
2917 in val.tab_offset. */
2919 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2920 /* If we are starting display in mid-character, correct tab_offset
2921 to account for passing the line that that character starts in. */
2922 if (val
.hpos
< lmargin
)
2923 tab_offset
+= width
;
2925 val
.bytepos
= pos_byte
;
2926 while (vpos
< height
)
2928 val
= *display_text_line (w
, pos
, val
.bytepos
,
2929 top
+ vpos
++, val
.hpos
,
2930 val
.tab_offset
, val
.ovstring_chars_done
);
2931 /* The following code is omitted because we maintain tab
2932 offset in val.tab_offset. */
2934 tab_offset
+= width
;
2935 if (val
.vpos
) tab_offset
= 0;
2940 /* Here is a case where display_text_line sets cursor_vpos wrong.
2941 Make it be fixed up, below. */
2947 /* If bottom just moved off end of frame, change mode line percentage. */
2948 if (XFASTINT (w
->window_end_pos
) == 0
2950 w
->update_mode_line
= Qt
;
2952 /* Attempt to adjust end-of-text positions to new bottom line */
2955 delta
= height
- xp
.vpos
;
2957 || (delta
> 0 && xp
.bufpos
<= ZV
)
2958 || (delta
== 0 && xp
.hpos
))
2960 val
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), delta
, w
);
2961 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2962 XSETFASTINT (w
->window_end_vpos
,
2963 XFASTINT (w
->window_end_vpos
) + val
.vpos
);
2967 w
->window_end_valid
= Qnil
;
2969 /* If point was not in a line that was displayed, find it */
2970 if (cursor_vpos
< 0)
2973 val
= *compute_motion (start
, 0, lmargin
, 0, PT
,
2974 /* Don't care for VPOS... */
2975 1 << (BITS_PER_SHORT
- 1),
2977 1 << (BITS_PER_SHORT
- 1),
2979 pos_tab_offset (w
, start
, start_byte
),
2981 /* Admit failure if point is off frame now */
2982 if (val
.vpos
>= height
)
2984 for (vpos
= 0; vpos
< height
; vpos
++)
2985 cancel_line (vpos
+ top
, f
);
2988 cursor_vpos
= val
.vpos
+ top
;
2989 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, val
.hpos
, width
);
2992 FRAME_CURSOR_X (f
) = cursor_hpos
;
2993 FRAME_CURSOR_Y (f
) = cursor_vpos
;
2997 val
= *compute_motion (start
, 0, lmargin
, 0, ZV
,
2998 height
, - (1 << (BITS_PER_SHORT
- 1)),
3000 pos_tab_offset (w
, start
, start_byte
),
3002 if (val
.vpos
!= XFASTINT (w
->window_end_vpos
))
3004 if (XFASTINT (w
->window_end_pos
)
3012 /* Copy LEN glyphs starting address FROM to the rope TO.
3013 But don't actually copy the parts that would come in before S.
3014 Value is TO, advanced past the copied data.
3015 F is the frame we are displaying in. */
3018 copy_part_of_rope (f
, to
, s
, from
, len
, face
)
3020 register GLYPH
*to
; /* Copy to here. */
3021 register GLYPH
*s
; /* Starting point. */
3022 Lisp_Object
*from
; /* Data to copy. */
3024 int face
; /* Face to apply to glyphs which don't specify one. */
3027 register Lisp_Object
*fp
= from
;
3028 /* These cache the results of the last call to compute_glyph_face. */
3030 int last_merged
= 0;
3033 if (! FRAME_TERMCAP_P (f
))
3036 GLYPH glyph
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3038 unsigned int c
= FAST_GLYPH_CHAR (glyph
);
3041 /* For an invalid character code, use space. */
3044 if (FAST_GLYPH_FACE (glyph
) == 0)
3045 /* If GLYPH has no face code, use FACE. */
3047 else if (FAST_GLYPH_FACE (glyph
) == last_code
)
3048 /* If it's same as previous glyph, use same result. */
3049 facecode
= last_merged
;
3052 /* Merge this glyph's face and remember the result. */
3053 last_code
= FAST_GLYPH_FACE (glyph
);
3054 last_merged
= facecode
= compute_glyph_face (f
, last_code
, face
);
3058 *to
= FAST_MAKE_GLYPH (c
, facecode
);
3066 if (to
>= s
) *to
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3073 /* Correct a glyph by replacing its specified user-level face code
3074 with a displayable computed face code. */
3077 fix_glyph (f
, glyph
, cface
)
3083 if (! FRAME_TERMCAP_P (f
))
3085 if (FAST_GLYPH_FACE (glyph
) != 0)
3086 cface
= compute_glyph_face (f
, FAST_GLYPH_FACE (glyph
), cface
);
3087 glyph
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), cface
);
3093 /* Return the column of position POS / POS_BYTE in window W's buffer.
3094 When used on the character at the beginning of a line,
3095 starting at column 0, this says how much to subtract from
3096 the column position of any character in the line
3097 to get its horizontal position on the screen. */
3100 pos_tab_offset (w
, pos
, pos_byte
)
3102 register int pos
, pos_byte
;
3105 int opoint_byte
= PT_BYTE
;
3107 int width
= window_internal_width (w
) - 1;
3110 return MINI_WINDOW_P (w
) ? -minibuf_prompt_width
: 0;
3112 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3115 TEMP_SET_PT_BOTH (pos
, pos_byte
);
3116 col
= current_column ();
3117 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
3122 /* Display one line of window W, starting at char position START in W's buffer.
3123 START_BYTE is the corresponding byte position.
3125 Display starting at horizontal position HPOS, expressed relative to
3126 W's left edge. In situations where the text at START shouldn't
3127 start at the left margin (i.e. when the window is hscrolled, or
3128 we're continuing a line which left off in the midst of a
3129 multi-column character), HPOS should be negative; we throw away
3130 characters up 'til hpos = 0. So, HPOS must take hscrolling into
3133 TABOFFSET is an offset for ostensible hpos, used in tab stop calculations.
3135 OVSTR_DONE is the number of chars of overlay before/after strings
3136 at this position which have already been processed.
3138 Display on position VPOS on the frame. It is origin 0, relative to
3139 the top of the frame, not W.
3141 Returns a STRUCT POSITION giving character to start next line with
3142 and where to display it, including a zero or negative hpos.
3143 The vpos field is not really a vpos; it is 1 unless the line is continued */
3145 struct position val_display_text_line
;
3147 static struct position
*
3148 display_text_line (w
, start
, start_byte
, vpos
, hpos
, taboffset
, ovstr_done
)
3156 register int pos
= start
;
3157 int pos_byte
= start_byte
;
3160 int pause
, limit_byte
;
3161 register unsigned char *p
;
3163 register GLYPH
*leftmargin
;
3164 register GLYPH
*p1prev
;
3165 register GLYPH
*p1start
;
3166 GLYPH
*p1_wide_column_end
= (GLYPH
*) 0;
3167 int prevpos
, prevpos_byte
;
3169 FRAME_PTR f
= XFRAME (w
->frame
);
3170 int tab_width
= XINT (current_buffer
->tab_width
);
3171 int ctl_arrow
= !NILP (current_buffer
->ctl_arrow
);
3172 int width
= window_internal_width (w
) - 1;
3173 struct position val
;
3174 int lastpos
, lastpos_byte
;
3176 int last_invis_skip
= 0;
3177 Lisp_Object last_invis_prop
;
3178 int hscroll
= XINT (w
->hscroll
);
3179 int truncate
= (hscroll
3180 || (truncate_partial_width_windows
3181 && !WINDOW_FULL_WIDTH_P (w
))
3182 || !NILP (current_buffer
->truncate_lines
));
3184 /* 1 if this buffer has a region to highlight. */
3185 int highlight_region
3186 = (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
)
3187 && XMARKER (current_buffer
->mark
)->buffer
!= 0);
3188 int region_beg
, region_end
;
3190 int selective
= (INTEGERP (current_buffer
->selective_display
)
3191 ? XINT (current_buffer
->selective_display
)
3192 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
3193 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
3194 register struct Lisp_Char_Table
*dp
= window_display_table (w
);
3196 Lisp_Object default_invis_vector
[3];
3197 /* Number of characters of ellipsis to display after an invisible line
3198 if it calls for an ellipsis.
3199 Note that this value can be nonzero regardless of whether
3200 selective display is enabled--you must check that separately. */
3202 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3203 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->size
3204 : !NILP (current_buffer
->selective_display_ellipses
) ? 3 : 0);
3205 /* This is the sequence of Lisp objects to display
3206 when there are invisible lines. */
3207 Lisp_Object
*invis_vector_contents
3208 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3209 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->contents
3210 : default_invis_vector
);
3212 GLYPH truncator
= (dp
== 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp
))
3213 || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp
)))
3214 ? '$' : XINT (DISP_TRUNC_GLYPH (dp
)));
3215 GLYPH continuer
= (dp
== 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp
))
3216 || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp
)))
3217 ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp
)));
3219 /* If 1, we must handle multibyte characters. */
3220 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
3221 /* Length of multibyte form of each character. */
3223 /* Glyphs generated should be set this bit mask if text must be
3224 displayed from right to left. */
3225 GLYPH rev_dir_bit
= (NILP (current_buffer
->direction_reversed
)
3226 ? 0 : GLYPH_MASK_REV_DIR
);
3228 /* The next buffer location at which the face should change, due
3229 to overlays or text property changes. */
3230 int next_face_change
;
3232 /* The next location where the `invisible' property changes, or an
3233 overlay starts or ends. */
3236 /* The face we're currently using. */
3237 int current_face
= 0;
3240 XSETFASTINT (default_invis_vector
[2], '.');
3241 default_invis_vector
[0] = default_invis_vector
[1] = default_invis_vector
[2];
3243 get_display_line (f
, vpos
, WINDOW_LEFT_MARGIN (w
));
3244 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
3246 /* Show where to highlight the region. */
3247 if (highlight_region
3248 /* Maybe highlight only in selected window. */
3249 && (highlight_nonselected_windows
3250 || w
== XWINDOW (selected_window
)
3251 || (MINI_WINDOW_P (XWINDOW (selected_window
))
3252 && w
== XWINDOW (Vminibuf_scroll_window
))))
3254 region_beg
= marker_position (current_buffer
->mark
);
3255 if (PT
< region_beg
)
3257 region_end
= region_beg
;
3262 w
->region_showing
= Qt
;
3266 region_beg
= region_end
= -1;
3267 w
->region_showing
= Qnil
;
3270 if (MINI_WINDOW_P (w
)
3272 && vpos
== XFASTINT (w
->top
))
3274 if (! NILP (minibuf_prompt
))
3276 int old_width
= minibuf_prompt_width
;
3278 minibuf_prompt_width
3279 = (display_string (w
, vpos
, XSTRING (minibuf_prompt
)->data
,
3280 STRING_BYTES (XSTRING (minibuf_prompt
)),
3281 hpos
+ WINDOW_LEFT_MARGIN (w
),
3282 /* Display a space if we truncate. */
3285 /* Truncate the prompt a little before the
3286 margin, so user input can at least start
3287 on the first line. */
3288 (XFASTINT (w
->width
) > 10
3289 ? XFASTINT (w
->width
) - 4 : -1),
3290 STRING_MULTIBYTE (minibuf_prompt
))
3291 - hpos
- WINDOW_LEFT_MARGIN (w
));
3292 hpos
+= minibuf_prompt_width
;
3293 taboffset
-= minibuf_prompt_width
- old_width
;
3296 minibuf_prompt_width
= 0;
3299 /* If we're hscrolled at all, use compute_motion to skip over any
3300 text off the left edge of the window. compute_motion may know
3301 tricks to do this faster than we can. */
3304 struct position
*left_edge
3305 = compute_motion (pos
, vpos
, hpos
, 0,
3307 width
, hscroll
, taboffset
, w
);
3309 /* Retrieve the buffer position and column provided by
3310 compute_motion. We can't assume that the column will be
3311 zero, because you may have multi-column characters crossing
3314 compute_motion may have moved us past the screen position we
3315 requested, if we hit a multi-column character, or the end of
3316 the line. If so, back up. */
3317 if (left_edge
->vpos
> vpos
3318 || left_edge
->hpos
> 0)
3320 pos
= left_edge
->bufpos
;
3321 pos_byte
= left_edge
->bytepos
;
3322 DEC_BOTH (pos
, pos_byte
);
3323 hpos
= left_edge
->prevhpos
;
3327 pos
= left_edge
->bufpos
;
3328 pos_byte
= left_edge
->bytepos
;
3329 hpos
= left_edge
->hpos
;
3333 hpos
+= WINDOW_LEFT_MARGIN (w
);
3335 desired_glyphs
->bufp
[vpos
] = start
;
3336 p1
= desired_glyphs
->glyphs
[vpos
] + hpos
;
3338 charstart
= desired_glyphs
->charstarts
[vpos
] + hpos
;
3339 /* In case we don't ever write anything into it... */
3340 desired_glyphs
->charstarts
[vpos
][WINDOW_LEFT_MARGIN (w
)] = -1;
3341 leftmargin
= desired_glyphs
->glyphs
[vpos
] + WINDOW_LEFT_MARGIN (w
);
3342 endp
= leftmargin
+ width
;
3344 /* Arrange the overlays nicely for our purposes. Usually, we call
3345 display_text_line on only one line at a time, in which case this
3346 can't really hurt too much, or we call it on lines which appear
3347 one after another in the buffer, in which case all calls to
3348 recenter_overlay_lists but the first will be pretty cheap. */
3349 recenter_overlay_lists (current_buffer
, pos
);
3351 /* Loop generating characters.
3352 Stop at end of buffer, before newline,
3353 if reach or pass continuation column,
3354 or at face change. */
3356 limit_byte
= pos_byte
;
3357 next_face_change
= pos
;
3358 next_boundary
= pos
;
3361 prevpos_byte
= pos_byte
;
3363 /* If the window is hscrolled and point is in the invisible part of the
3364 current line beyond the left margin we can record the cursor location
3366 if (hscroll
&& start
<= PT
&& PT
< pos
&& cursor_vpos
< 0)
3369 cursor_hpos
= p1
- leftmargin
;
3378 while (pos
== next_boundary
)
3380 Lisp_Object position
, limit
, prop
, ww
;
3382 /* Display the overlay strings here, unless we're at ZV
3383 and have already displayed the appropriate strings
3384 on an earlier line. */
3385 if (pos
< ZV
|| !zv_strings_seen
++)
3388 unsigned char *ovstr
;
3389 ovlen
= overlay_strings (pos
, w
, &ovstr
);
3393 /* Skip the ones we did in a previous line. */
3394 ovstr
+= ovstr_done
;
3395 ovlen
-= ovstr_done
;
3404 c
= STRING_CHAR_AND_LENGTH (ovstr
, ovlen
, len
);
3405 ovstr
+= len
, ovlen
-= len
, ovstr_done
+= len
;
3406 charset
= CHAR_CHARSET (c
);
3407 cols
= (charset
== CHARSET_COMPOSITION
3408 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3409 : CHARSET_WIDTH (charset
));
3413 c
= *ovstr
++, ovlen
--, ovstr_done
++;
3416 g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3419 if (p1
>= leftmargin
&& p1
< endp
)
3420 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3424 /* If we did all the overlay strings
3425 and we have room for text, clear ovstr_done
3426 just for neatness' sake. */
3427 if (ovlen
== 0 && p1
< endp
)
3432 /* Did we reach point? Record the cursor location. */
3433 if (pos
== PT
&& cursor_vpos
< 0)
3436 cursor_hpos
= p1
- leftmargin
;
3442 XSETFASTINT (position
, pos
);
3443 limit
= Fnext_overlay_change (position
);
3444 #ifdef USE_TEXT_PROPERTIES
3445 /* This is just an estimate to give reasonable
3446 performance; nothing should go wrong if it is too small. */
3447 if (XFASTINT (limit
) > pos
+ 50)
3449 int limitpos
= pos
+ 50;
3450 XSETFASTINT (limit
, limitpos
);
3452 limit
= Fnext_single_property_change (position
, Qinvisible
,
3453 Fcurrent_buffer (), limit
);
3455 next_boundary
= XFASTINT (limit
);
3456 /* if the `invisible' property is set, we can skip to
3457 the next property change. */
3459 prop
= Fget_char_property (position
, Qinvisible
, ww
);
3460 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
3462 if (pos
< PT
&& next_boundary
>= PT
)
3465 cursor_hpos
= p1
- leftmargin
;
3467 pos
= next_boundary
;
3468 pos_byte
= CHAR_TO_BYTE (pos
);
3469 last_invis_skip
= pos
;
3470 last_invis_prop
= prop
;
3474 /* Did we reach point? Record the cursor location. */
3475 if (pos
== PT
&& cursor_vpos
< 0)
3478 cursor_hpos
= p1
- leftmargin
;
3481 /* Did we hit the end of the visible region of the buffer?
3485 /* Update charstarts for the end of this line. */
3486 /* Do nothing if off the left edge or at the right edge. */
3487 if (p1
>= leftmargin
&& p1
+ 1 != endp
)
3489 int *p2x
= &charstart
[(p1
< leftmargin
3497 /* Figure out where (if at all) the
3498 redisplay_end_trigger-hook should run. */
3499 if (MARKERP (w
->redisplay_end_trigger
)
3500 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
3501 e_t_h
= marker_position (w
->redisplay_end_trigger
);
3502 else if (INTEGERP (w
->redisplay_end_trigger
))
3503 e_t_h
= XINT (w
->redisplay_end_trigger
);
3507 /* If we've gone past the place to run a hook,
3509 if (pos
>= e_t_h
&& e_t_h
!= ZV
)
3511 Lisp_Object args
[3];
3513 args
[0] = Qredisplay_end_trigger_functions
;
3514 XSETWINDOW (args
[1], w
);
3515 XSETINT (args
[2], e_t_h
);
3517 /* Since we are *trying* to run these functions,
3518 don't try to run them again, even if they get an error. */
3519 w
->redisplay_end_trigger
= Qnil
;
3520 Frun_hook_with_args (3, args
);
3523 /* Notice if it changed the face of this character. */
3524 next_face_change
= pos
;
3528 /* Did we hit a face change? Figure out what face we should
3529 use now. We also hit this the first time through the
3530 loop, to see what face we should start with. */
3531 if (pos
>= next_face_change
3532 && (FRAME_WINDOW_P (f
) || FRAME_MSDOS_P (f
)))
3534 int limit
= pos
+ 50;
3536 current_face
= compute_char_face (f
, w
, pos
,
3537 region_beg
, region_end
,
3538 &next_face_change
, limit
, 0);
3542 /* Compute the next place we need to stop
3543 and do something special; set PAUSE. */
3547 if (pos
< next_boundary
&& next_boundary
< pause
)
3548 pause
= next_boundary
;
3549 if (pos
< next_face_change
&& next_face_change
< pause
)
3550 pause
= next_face_change
;
3555 /* Wouldn't you hate to read the next line to someone over
3557 if (pos
< PT
&& PT
< pause
)
3559 if (pos
< GPT
&& GPT
< pause
)
3562 /* LIMIT_BYTE is not the same place in the buffer as PAUSE.
3563 It is a limit on valid characters.
3564 We use it to bound STRING_CHAR_AND_LENGTH. */
3565 limit_byte
= ZV_BYTE
;
3566 if (pos
< GPT
&& GPT_BYTE
< limit_byte
)
3567 limit_byte
= GPT_BYTE
;
3570 int temp
= CHAR_TO_BYTE (pos
);
3571 p
= BYTE_POS_ADDR (temp
);
3579 p1_wide_column_end
= (GLYPH
*) 0;
3582 c
= STRING_CHAR_AND_LENGTH (p
, limit_byte
- pos_byte
, len
), p
+= len
;
3585 /* Let a display table override all standard display methods. */
3586 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
3588 p1
= copy_part_of_rope (f
, p1
, leftmargin
,
3589 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
3590 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
3591 current_face
, rev_dir_bit
);
3593 else if (c
>= 040 && c
< 0177)
3595 if (p1
>= leftmargin
)
3596 *p1
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3602 /* Same as p1prev, but after the invis_vector_contents text
3603 (if we have that on this line). */
3604 GLYPH
*p1prev_modified
;
3608 if (last_invis_skip
== pos
3609 && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop
))
3613 && indented_beyond_p (pos
+ 1, pos_byte
+ 1, selective
))
3615 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3618 INC_BOTH (pos
, pos_byte
);
3619 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3620 pos
= PT
, pos_byte
= PT_BYTE
;
3621 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3626 SET_PT_BOTH (opoint
, opoint_byte
);
3628 if (invis
&& selective_rlen
> 0 && p1
>= leftmargin
)
3633 cs
= charstart
+ (p1
- p1start
);
3636 p1
+= selective_rlen
;
3637 if (p1
- leftmargin
> width
)
3640 #if 0 /* This needs more work; charstarts needs to record
3641 both whether a position ho;ds an ellipsis character
3642 and what buffer position it corresponds to. */
3643 csend
= charstart
+ (p1
- p1start
);
3646 /* The idea is to use p1prev_modified instead of p1prev
3647 in the loop below over p2x. */
3648 p1prev_modified
= p1
;
3651 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3652 (p1
- p1prev
), current_face
, rev_dir_bit
);
3655 /* Update charstarts for the newline that ended this line. */
3656 /* Do nothing here for a char that's entirely off the left edge
3657 or if it starts at the right edge. */
3658 if (p1
>= leftmargin
&& p1prev
!= endp
)
3660 /* Store the newline's position into charstarts
3661 for the column where the newline starts.
3662 Store -1 for the rest of the glyphs it occupies. */
3663 int *p2x
= &charstart
[(p1prev
< leftmargin
3664 ? leftmargin
: p1prev
)
3666 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3673 /* Draw the face of the newline character as extending all the
3674 way to the end of the frame line. */
3677 if (p1
< leftmargin
)
3680 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3690 if (p1
>= leftmargin
&& p1
< endp
)
3691 *p1
= MAKE_GLYPH (f
, ' ', current_face
) | rev_dir_bit
;
3694 while ((p1
- leftmargin
+ taboffset
+ hscroll
- (hscroll
> 0))
3697 else if (c
== Ctl ('M') && selective
== -1)
3699 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3700 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3701 pos
= PT
, pos_byte
= PT_BYTE
;
3702 SET_PT_BOTH (opoint
, opoint_byte
);
3704 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3706 if (selective_rlen
> 0)
3708 p1
+= selective_rlen
;
3709 if (p1
- leftmargin
> width
)
3711 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3712 (p1
- p1prev
), current_face
, rev_dir_bit
);
3715 /* Draw the face of the newline character as extending all the
3716 way to the end of the frame line. */
3719 if (p1
< leftmargin
)
3722 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3726 /* Update charstarts for the ^M that ended this line. */
3727 /* Do nothing here for a char that's entirely off the left edge
3728 or if it starts at the right edge. */
3729 if (p1
>= leftmargin
&& p1prev
!= endp
)
3731 /* Store the newline's position into charstarts
3732 for the column where the newline starts.
3733 Store -1 for the rest of the glyphs it occupies. */
3734 int *p2x
= &charstart
[(p1prev
< leftmargin
3735 ? leftmargin
: p1prev
)
3737 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3745 else if (c
< 0200 && ctl_arrow
)
3747 if (p1
>= leftmargin
)
3749 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
3750 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
3751 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
3755 if (p1
>= leftmargin
&& p1
< endp
)
3756 *p1
= MAKE_GLYPH (f
, c
^ 0100, current_face
) | rev_dir_bit
;
3761 /* C is a multibyte character or a character to be displayed
3763 int remaining_bytes
= len
;
3767 /* C is a multibyte character. */
3768 int charset
= CHAR_CHARSET (c
);
3769 int columns
= (charset
== CHARSET_COMPOSITION
3770 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3771 : CHARSET_WIDTH (charset
));
3772 GLYPH g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3776 if (p1
>= leftmargin
&& p1
< endp
)
3777 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3780 p1_wide_column_end
= p1
;
3781 remaining_bytes
-= CHARSET_BYTES (charset
);
3784 while (remaining_bytes
> 0)
3786 c
= *(p
- remaining_bytes
--);
3788 if (p1
>= leftmargin
&& p1
< endp
)
3791 (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
3792 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
3793 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
3797 if (p1
>= leftmargin
&& p1
< endp
)
3798 *p1
= (MAKE_GLYPH (f
, (c
>> 6) + '0', current_face
)
3801 if (p1
>= leftmargin
&& p1
< endp
)
3802 *p1
= (MAKE_GLYPH (f
, (7 & (c
>> 3)) + '0', current_face
)
3805 if (p1
>= leftmargin
&& p1
< endp
)
3806 *p1
= (MAKE_GLYPH (f
, (7 & c
) + '0', current_face
)
3813 prevpos_byte
= pos_byte
;
3817 /* Update charstarts for the character just output. */
3819 /* Do nothing here for a char that's entirely off the left edge. */
3820 if (p1
>= leftmargin
)
3822 /* Store the char's position into charstarts
3823 for the first glyph occupied by this char.
3824 Store -1 for the rest of the glyphs it occupies. */
3827 int *p2x
= &charstart
[(p1prev
< leftmargin
3828 ? leftmargin
: p1prev
)
3830 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3840 val
.hpos
= - XINT (w
->hscroll
);
3847 lastpos_byte
= pos_byte
;
3849 /* Store 0 in this charstart line for the positions where
3850 there is no character. But do leave what was recorded
3851 for the character that ended the line. */
3852 /* Add 1 in the endtest to compensate for the fact that ENDP was
3853 made from WIDTH, which is 1 less than the window's actual
3855 i
= p1
- p1start
+ 1;
3856 if (p1
< leftmargin
)
3857 i
+= leftmargin
- p1
;
3858 for (; i
< endp
- p1start
+ 1; i
++)
3861 /* Handle continuation in middle of a character */
3862 /* by backing up over it */
3865 /* Don't back up if we never actually displayed any text.
3866 This occurs when the minibuffer prompt takes up the whole line. */
3869 /* Start the next line with that same character whose
3870 character code is C and the length of multi-byte form is
3873 pos_byte
= prevpos_byte
;
3875 if (p1_wide_column_end
< endp
)
3876 /* As ENDP is not in the middle of wide-column character,
3877 we can break the line at ENDP and start from the middle
3878 column in the next line. So, adjust VAL.HPOS to skip
3879 the columns output on this line. */
3880 val
.hpos
+= p1prev
- endp
;
3883 /* We displayed a wide-column character at around ENDP.
3884 Since we can't broke it in the middle, the whole
3885 character should be driven into the next line. */
3886 /* As the result, the actual columns occupied by the
3887 text on this line is less than WIDTH. VAL.TAB_OFFSET
3888 must be adjusted. */
3889 taboffset
= taboffset
+ (p1prev
- endp
);
3890 /* Let's fill unused columns with TRUNCATOR or CONTINUER. */
3892 GLYPH g
= fix_glyph (f
, truncate
? truncator
: continuer
, 0);
3893 while (p1prev
< endp
)
3896 /* If POINT is at POS, cursor should not on this line. */
3898 lastpos_byte
= pos_byte
;
3904 /* Keep in this line everything up to the continuation column. */
3908 /* Finish deciding which character to start the next line on,
3909 and what hpos to start it at.
3910 Also set `lastpos' to the last position which counts as "on this line"
3911 for cursor-positioning. */
3915 if (FETCH_BYTE (pos_byte
) == '\n')
3917 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3919 /* If stopped due to a newline, start next line after it */
3920 SET_PT_BOTH (pos
+ 1, pos_byte
+ 1);
3923 /* Check again for hidden lines, in case the newline occurred exactly
3924 at the right margin. */
3925 while (PT
< ZV
&& selective
> 0
3926 && indented_beyond_p (PT
, PT_BYTE
, selective
))
3927 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3929 pos
= PT
, pos_byte
= PT_BYTE
;
3930 SET_PT_BOTH (opoint
, opoint_byte
);
3933 /* Stopped due to right margin of window */
3937 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3939 SET_PT_BOTH (pos
, pos_byte
);
3940 *p1
++ = fix_glyph (f
, truncator
, 0);
3941 /* Truncating => start next line after next newline,
3942 and point is on this line if it is before the newline,
3943 and skip none of first char of next line */
3945 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3946 while (PT
< ZV
&& selective
> 0
3947 && indented_beyond_p (PT
, PT_BYTE
, selective
));
3948 pos
= PT
, pos_byte
= PT_BYTE
;
3949 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
3950 SET_PT_BOTH (opoint
, opoint_byte
);
3952 lastpos
= pos
- (FETCH_BYTE (pos_byte
- 1) == '\n');
3953 lastpos_byte
= CHAR_TO_BYTE (lastpos
);
3958 *p1
++ = fix_glyph (f
, continuer
, 0);
3960 DEC_BOTH (lastpos
, lastpos_byte
);
3961 val
.tab_offset
= taboffset
+ width
;
3968 /* If point is at eol or in invisible text at eol,
3969 record its frame location now. */
3971 if (start
<= PT
&& PT
<= lastpos
&& cursor_vpos
< 0)
3974 cursor_hpos
= p1
- leftmargin
;
3977 if (cursor_vpos
== vpos
)
3979 if (cursor_hpos
< 0) cursor_hpos
= 0;
3980 if (cursor_hpos
> width
) cursor_hpos
= width
;
3981 cursor_hpos
+= WINDOW_LEFT_MARGIN (w
);
3982 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
3984 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (f
)
3985 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
)))
3987 FRAME_CURSOR_Y (f
) = cursor_vpos
;
3988 FRAME_CURSOR_X (f
) = cursor_hpos
;
3991 if (w
== XWINDOW (selected_window
))
3993 /* Line is not continued and did not start
3994 in middle of character */
3995 if ((hpos
- WINDOW_LEFT_MARGIN (w
)
3996 == (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
3999 this_line_bufpos
= start
;
4000 this_line_buffer
= current_buffer
;
4001 this_line_vpos
= cursor_vpos
;
4002 this_line_start_hpos
= hpos
- WINDOW_LEFT_MARGIN (w
);
4003 this_line_endpos
= Z
- lastpos
;
4006 this_line_bufpos
= 0;
4011 /* If hscroll and line not empty, insert truncation-at-left marker */
4012 if (hscroll
&& lastpos
!= start
)
4014 GLYPH g
= fix_glyph (f
, truncator
, 0);
4016 if (p1
<= leftmargin
)
4017 p1
= leftmargin
+ 1;
4018 else /* MULE: it may be a wide-column character */
4020 p1prev
= leftmargin
+ 1;
4021 while (p1prev
< p1
&& *p1prev
& GLYPH_MASK_PADDING
)
4026 if (!WINDOW_RIGHTMOST_P (w
))
4029 if (p1
< leftmargin
) p1
= leftmargin
;
4030 while (p1
< endp
) *p1
++ = SPACEGLYPH
;
4032 /* Don't draw vertical bars if we're using scroll bars. They're
4033 covered up by the scroll bars, and it's distracting to see
4034 them when the scroll bar windows are flickering around to be
4036 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
4039 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
4042 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
4043 *p1
++ = (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
4044 ? XINT (DISP_BORDER_GLYPH (dp
))
4047 desired_glyphs
->used
[vpos
] = max (desired_glyphs
->used
[vpos
],
4048 p1
- desired_glyphs
->glyphs
[vpos
]);
4049 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
4051 /* If the start of this line is the overlay arrow-position,
4052 then put the arrow string into the display-line. */
4054 if (MARKERP (Voverlay_arrow_position
)
4055 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
4056 && start
== marker_position (Voverlay_arrow_position
)
4057 && STRINGP (Voverlay_arrow_string
)
4058 && ! overlay_arrow_seen
)
4061 int len
= XSTRING (Voverlay_arrow_string
)->size
;
4067 /* If the arrow string has text props, obey them when displaying. */
4068 for (i
= 0, i_byte
= 0; i
< len
; )
4071 Lisp_Object face
, ilisp
;
4075 if (STRING_MULTIBYTE (Voverlay_arrow_string
))
4076 FETCH_STRING_CHAR_ADVANCE (c
, Voverlay_arrow_string
, i
, i_byte
);
4078 c
= XSTRING (Voverlay_arrow_string
)->data
[i
++];
4080 XSETFASTINT (ilisp
, i
);
4082 if (FRAME_WINDOW_P (f
))
4084 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
4085 newface
= compute_glyph_face_1 (f
, face
, 0);
4086 c
= FAST_MAKE_GLYPH (c
, newface
);
4088 #endif /* HAVE_FACES */
4089 leftmargin
[idx
] = c
;
4092 /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */
4093 arrow_end
= (leftmargin
- desired_glyphs
->glyphs
[vpos
]) + len
;
4094 if (desired_glyphs
->used
[vpos
] < arrow_end
)
4095 desired_glyphs
->used
[vpos
] = arrow_end
;
4097 overlay_arrow_seen
= 1;
4101 val
.bytepos
= pos_byte
;
4102 val
.ovstring_chars_done
= ovstr_done
;
4103 val_display_text_line
= val
;
4104 return &val_display_text_line
;
4107 /* Redisplay the menu bar in the frame for window W. */
4110 display_menu_bar (w
)
4113 Lisp_Object items
, tail
;
4114 register int vpos
= 0;
4115 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4116 int maxendcol
= FRAME_WIDTH (f
);
4121 if (!NILP (Vwindow_system
))
4125 #ifdef USE_X_TOOLKIT
4128 #endif /* USE_X_TOOLKIT */
4130 get_display_line (f
, vpos
, 0);
4132 items
= FRAME_MENU_BAR_ITEMS (f
);
4133 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
4135 Lisp_Object pos
, string
;
4136 string
= XVECTOR (items
)->contents
[i
+ 1];
4140 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], hpos
);
4142 if (hpos
< maxendcol
)
4143 hpos
= display_string (w
, vpos
,
4144 XSTRING (string
)->data
,
4145 STRING_BYTES (XSTRING (string
)),
4146 hpos
, 0, 0, hpos
, maxendcol
,
4147 STRING_MULTIBYTE (string
));
4148 /* Put a space between items. */
4149 if (hpos
< maxendcol
)
4151 int hpos1
= hpos
+ 1;
4152 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0,
4153 min (hpos1
, maxendcol
), maxendcol
, 0);
4157 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4158 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4160 /* Fill out the line with spaces. */
4161 if (maxendcol
> hpos
)
4162 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0, maxendcol
, maxendcol
, 0);
4164 /* Clear the rest of the lines allocated to the menu bar. */
4166 while (vpos
< FRAME_MENU_BAR_LINES (f
))
4167 get_display_line (f
, vpos
++, 0);
4170 /* Display the mode line for window w */
4173 display_mode_line (w
)
4176 register int vpos
= XFASTINT (w
->height
) + XFASTINT (w
->top
) - 1;
4177 register int left
= WINDOW_LEFT_MARGIN (w
);
4178 register int right
= WINDOW_RIGHT_MARGIN (w
);
4179 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4181 line_number_displayed
= 0;
4182 w
->column_number_displayed
= Qnil
;
4184 get_display_line (f
, vpos
, left
);
4186 /* Temporarily make frame F's kboard the current kboard
4187 so that kboard-local variables in the mode_line_format
4188 will get the right values. */
4189 push_frame_kboard (f
);
4191 display_mode_element (w
, vpos
, left
, 0, right
, right
,
4192 current_buffer
->mode_line_format
);
4194 pop_frame_kboard ();
4196 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4198 /* Put the mode line in inverse video.
4199 Use faces if possible, since that lets us handle
4200 partial-width windows and avoid inverting the scroll bar columns. */
4202 if (! FRAME_TERMCAP_P (f
) && mode_line_inverse_video
)
4204 /* For a partial width window, explicitly set face of each glyph. */
4206 unsigned int padding
;
4207 GLYPH
*ptr
= FRAME_DESIRED_GLYPHS (f
)->glyphs
[vpos
];
4208 for (i
= left
; i
< right
; ++i
)
4210 padding
= ptr
[i
] & GLYPH_MASK_PADDING
;
4211 ptr
[i
] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr
[i
]), 1) | padding
;
4217 /* Make the mode line inverse video if the entire line
4218 is made of mode lines.
4219 I.e. if this window is full width,
4220 or if it is the child of a full width window
4221 (which implies that that window is split side-by-side
4222 and the rest of this line is mode lines of the sibling windows). */
4223 if (WINDOW_FULL_WIDTH_P (w
)
4224 || WINDOW_FULL_WIDTH_P (XWINDOW (w
->parent
)))
4225 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4228 /* Contribute ELT to the mode line for window W.
4229 How it translates into text depends on its data type.
4231 VPOS is the position of the mode line being displayed.
4233 HPOS is the position (absolute on frame) where this element's text
4234 should start. The output is truncated automatically at the right
4237 DEPTH is the depth in recursion. It is used to prevent
4238 infinite recursion here.
4240 MINENDCOL is the hpos before which the element may not end.
4241 The element is padded at the right with spaces if nec
4242 to reach this column.
4244 MAXENDCOL is the hpos past which this element may not extend.
4245 If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority.
4246 (This is necessary to make nested padding and truncation work.)
4248 Returns the hpos of the end of the text generated by ELT.
4249 The next element will receive that value as its HPOS arg,
4250 so as to concatenate the elements. */
4253 display_mode_element (w
, vpos
, hpos
, depth
, minendcol
, maxendcol
, elt
)
4255 register int vpos
, hpos
;
4258 register int maxendcol
;
4259 register Lisp_Object elt
;
4267 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
4271 /* A string: output it and check for %-constructs within it. */
4272 register unsigned char c
;
4273 register unsigned char *this = XSTRING (elt
)->data
;
4275 while (hpos
< maxendcol
&& *this)
4277 unsigned char *last
= this;
4278 while ((c
= *this++) != '\0' && c
!= '%')
4280 if (this - 1 != last
)
4282 register int lim
= --this - last
+ hpos
;
4283 if (frame_title_ptr
)
4284 hpos
= store_frame_title (last
, hpos
, min (lim
, maxendcol
));
4286 hpos
= display_string (w
, vpos
, last
, -1, hpos
, 0, 1,
4287 hpos
, min (lim
, maxendcol
),
4288 STRING_MULTIBYTE (elt
));
4292 register int minendcol
;
4293 register int spec_width
= 0;
4295 /* We can't allow -ve args due to the "%-" construct */
4296 /* Argument specifies minwidth but not maxwidth
4297 (maxwidth can be specified by
4298 (<negative-number> . <stuff>) mode-line elements) */
4300 while ((c
= *this++) >= '0' && c
<= '9')
4302 spec_width
= spec_width
* 10 + (c
- '0');
4305 minendcol
= hpos
+ spec_width
;
4306 if (minendcol
> maxendcol
)
4308 spec_width
= maxendcol
- hpos
;
4309 minendcol
= maxendcol
;
4313 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4314 spec_width
, maxendcol
,
4315 Vglobal_mode_string
);
4318 char *spec
= decode_mode_spec (w
, c
, spec_width
,
4320 if (frame_title_ptr
)
4321 hpos
= store_frame_title (spec
, minendcol
, maxendcol
);
4323 hpos
= display_string (w
, vpos
, spec
, -1,
4325 minendcol
, maxendcol
, -1);
4333 /* A symbol: process the value of the symbol recursively
4334 as if it appeared here directly. Avoid error if symbol void.
4335 Special case: if value of symbol is a string, output the string
4338 register Lisp_Object tem
;
4339 tem
= Fboundp (elt
);
4342 tem
= Fsymbol_value (elt
);
4343 /* If value is a string, output that string literally:
4344 don't check for % within it. */
4347 if (frame_title_ptr
)
4348 hpos
= store_frame_title (XSTRING (tem
)->data
,
4349 minendcol
, maxendcol
);
4351 hpos
= display_string (w
, vpos
, XSTRING (tem
)->data
,
4352 STRING_BYTES (XSTRING (tem
)),
4353 hpos
, 0, 1, minendcol
, maxendcol
,
4354 STRING_MULTIBYTE (tem
));
4356 /* Give up right away for nil or t. */
4357 else if (!EQ (tem
, elt
))
4358 { elt
= tem
; goto tail_recurse
; }
4365 register Lisp_Object car
, tem
;
4367 /* A cons cell: three distinct cases.
4368 If first element is a string or a cons, process all the elements
4369 and effectively concatenate them.
4370 If first element is a negative number, truncate displaying cdr to
4371 at most that many characters. If positive, pad (with spaces)
4372 to at least that many characters.
4373 If first element is a symbol, process the cadr or caddr recursively
4374 according to whether the symbol's value is non-nil or nil. */
4375 car
= XCONS (elt
)->car
;
4378 tem
= Fboundp (car
);
4379 elt
= XCONS (elt
)->cdr
;
4382 /* elt is now the cdr, and we know it is a cons cell.
4383 Use its car if CAR has a non-nil value. */
4386 tem
= Fsymbol_value (car
);
4388 { elt
= XCONS (elt
)->car
; goto tail_recurse
; }
4390 /* Symbol's value is nil (or symbol is unbound)
4391 Get the cddr of the original list
4392 and if possible find the caddr and use that. */
4393 elt
= XCONS (elt
)->cdr
;
4396 else if (!CONSP (elt
))
4398 elt
= XCONS (elt
)->car
;
4401 else if (INTEGERP (car
))
4403 register int lim
= XINT (car
);
4404 elt
= XCONS (elt
)->cdr
;
4406 /* Negative int means reduce maximum width.
4407 DO NOT change MINENDCOL here!
4408 (20 -10 . foo) should truncate foo to 10 col
4409 and then pad to 20. */
4410 maxendcol
= min (maxendcol
, hpos
- lim
);
4413 /* Padding specified. Don't let it be more than
4416 if (lim
> maxendcol
)
4418 /* If that's more padding than already wanted, queue it.
4419 But don't reduce padding already specified even if
4420 that is beyond the current truncation point. */
4421 if (lim
> minendcol
)
4426 else if (STRINGP (car
) || CONSP (car
))
4428 register int limit
= 50;
4429 /* LIMIT is to protect against circular lists. */
4430 while (CONSP (elt
) && --limit
> 0
4431 && hpos
< maxendcol
)
4433 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4436 elt
= XCONS (elt
)->cdr
;
4444 if (frame_title_ptr
)
4445 hpos
= store_frame_title ("*invalid*", minendcol
, maxendcol
);
4447 hpos
= display_string (w
, vpos
, "*invalid*", -1, hpos
, 0, 1,
4448 minendcol
, maxendcol
, 0);
4452 if (minendcol
> hpos
)
4453 if (frame_title_ptr
)
4454 hpos
= store_frame_title ("", minendcol
, maxendcol
);
4456 hpos
= display_string (w
, vpos
, "", 0, hpos
,
4457 0, 1, minendcol
, maxendcol
, 0);
4461 /* Write a null-terminated, right justified decimal representation of
4462 the positive integer D to BUF using a minimal field width WIDTH. */
4465 pint2str (buf
, width
, d
)
4470 register char *p
= buf
;
4477 *p
++ = d
% 10 + '0';
4480 for (width
-= (int) (p
- buf
); width
> 0; --width
) *p
++ = ' ';
4490 /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF.
4491 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
4492 type of CODING_SYSTEM. Return updated pointer into BUF. */
4495 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
4496 Lisp_Object coding_system
;
4501 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
4503 val
= coding_system
;
4505 if (NILP (val
)) /* Not yet decided. */
4510 *buf
++ = eol_mnemonic_undecided
;
4511 /* Don't mention EOL conversion if it isn't decided. */
4515 Lisp_Object eolvalue
;
4517 eolvalue
= Fget (coding_system
, Qeol_type
);
4519 while (!NILP (val
) && SYMBOLP (val
))
4521 val
= Fget (val
, Qcoding_system
);
4522 if (NILP (eolvalue
))
4523 eolvalue
= Fget (val
, Qeol_type
);
4527 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
4531 /* The EOL conversion we are using. */
4533 /* The EOL conversion that is normal on this system. */
4535 if (NILP (eolvalue
)) /* Not yet decided. */
4536 eoltype
= eol_mnemonic_undecided
;
4537 else if (VECTORP (eolvalue
)) /* Not yet decided. */
4538 eoltype
= eol_mnemonic_undecided
;
4539 else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */
4540 eoltype
= (XFASTINT (eolvalue
) == 0
4542 : (XFASTINT (eolvalue
) == 1
4543 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
4545 /* Mention the EOL conversion if it is not the usual one. */
4552 /* Return a string for the output of a mode line %-spec for window W,
4553 generated by character C. SPEC_WIDTH is the field width when
4554 padding to the left (%c, %l). The value returned from this
4555 function will later be truncated to width MAXWIDTH. */
4557 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
4560 decode_mode_spec (w
, c
, spec_width
, maxwidth
)
4563 register int spec_width
;
4564 register int maxwidth
;
4567 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4568 char *decode_mode_spec_buf
= (char *) FRAME_TEMP_GLYPHS (f
)->total_contents
;
4569 struct buffer
*b
= XBUFFER (w
->buffer
);
4572 if (maxwidth
> FRAME_WIDTH (f
))
4573 maxwidth
= FRAME_WIDTH (f
);
4578 if (!NILP (b
->read_only
))
4580 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4585 /* This differs from %* only for a modified read-only buffer. */
4586 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4588 if (!NILP (b
->read_only
))
4593 /* This differs from %* in ignoring read-only-ness. */
4594 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4606 if (command_loop_level
> 5)
4608 p
= decode_mode_spec_buf
;
4609 for (i
= 0; i
< command_loop_level
; i
++)
4612 return decode_mode_spec_buf
;
4620 if (command_loop_level
> 5)
4622 p
= decode_mode_spec_buf
;
4623 for (i
= 0; i
< command_loop_level
; i
++)
4626 return decode_mode_spec_buf
;
4634 if (maxwidth
< sizeof (lots_of_dashes
))
4635 return lots_of_dashes
;
4638 for (p
= decode_mode_spec_buf
, i
= maxwidth
; i
> 0; i
--)
4642 return decode_mode_spec_buf
;
4648 if (maxwidth
>= 3 && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4650 bcopy (XSTRING (obj
)->data
, decode_mode_spec_buf
, maxwidth
- 1);
4651 decode_mode_spec_buf
[maxwidth
- 1] = '\\';
4652 decode_mode_spec_buf
[maxwidth
] = '\0';
4653 return decode_mode_spec_buf
;
4660 int col
= current_column ();
4661 XSETFASTINT (w
->column_number_displayed
, col
);
4662 pint2str (decode_mode_spec_buf
, spec_width
, col
);
4663 return decode_mode_spec_buf
;
4667 /* %F displays the frame name. */
4668 /* Systems that can only display a single frame at a time should
4669 NOT replace the frame name with the (constant) frame title,
4670 since then they won't be able to tell which frame is that. */
4671 if (FRAME_WINDOW_P (f
) && !NILP (f
->title
))
4672 return (char *) XSTRING (f
->title
)->data
;
4673 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
4674 return (char *) XSTRING (f
->name
)->data
;
4682 else if (STRINGP (obj
) && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4684 bcopy ("...", decode_mode_spec_buf
, 3);
4685 bcopy (XSTRING (obj
)->data
+ STRING_BYTES (XSTRING (obj
)) - maxwidth
+ 3,
4686 decode_mode_spec_buf
+ 3, maxwidth
- 3);
4687 return decode_mode_spec_buf
;
4694 int startpos
= XMARKER (w
->start
)->charpos
;
4695 int startpos_byte
= marker_byte_position (w
->start
);
4696 int line
, linepos
, linepos_byte
, topline
;
4699 int height
= XFASTINT (w
->height
);
4701 /* If we decided that this buffer isn't suitable for line numbers,
4702 don't forget that too fast. */
4703 if (EQ (w
->base_line_pos
, w
->buffer
))
4705 /* But do forget it, if the window shows a different buffer now. */
4706 else if (BUFFERP (w
->base_line_pos
))
4707 w
->base_line_pos
= Qnil
;
4709 /* If the buffer is very big, don't waste time. */
4710 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
4712 w
->base_line_pos
= Qnil
;
4713 w
->base_line_number
= Qnil
;
4717 if (!NILP (w
->base_line_number
)
4718 && !NILP (w
->base_line_pos
)
4719 && XFASTINT (w
->base_line_pos
) <= startpos
)
4721 line
= XFASTINT (w
->base_line_number
);
4722 linepos
= XFASTINT (w
->base_line_pos
);
4723 linepos_byte
= buf_charpos_to_bytepos (b
, linepos
);
4728 linepos
= BUF_BEGV (b
);
4729 linepos_byte
= BUF_BEGV_BYTE (b
);
4732 /* Count lines from base line to window start position. */
4733 nlines
= display_count_lines (linepos
, linepos_byte
,
4737 topline
= nlines
+ line
;
4739 /* Determine a new base line, if the old one is too close
4740 or too far away, or if we did not have one.
4741 "Too close" means it's plausible a scroll-down would
4743 if (startpos
== BUF_BEGV (b
))
4745 XSETFASTINT (w
->base_line_number
, topline
);
4746 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
4748 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
4749 || linepos
== BUF_BEGV (b
))
4751 int limit
= BUF_BEGV (b
);
4752 int limit_byte
= BUF_BEGV_BYTE (b
);
4754 int distance
= (height
* 2 + 30) * 200;
4756 if (startpos
- distance
> limit
)
4758 limit
= startpos
- distance
;
4759 limit_byte
= CHAR_TO_BYTE (limit
);
4762 nlines
= display_count_lines (startpos
, startpos_byte
,
4764 - (height
* 2 + 30),
4766 /* If we couldn't find the lines we wanted within
4768 give up on line numbers for this window. */
4769 if (position
== limit_byte
&& limit
== startpos
- distance
)
4771 w
->base_line_pos
= w
->buffer
;
4772 w
->base_line_number
= Qnil
;
4776 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
4777 XSETFASTINT (w
->base_line_pos
, BYTE_TO_CHAR (position
));
4780 /* Now count lines from the start pos to point. */
4781 nlines
= display_count_lines (startpos
, startpos_byte
,
4782 PT_BYTE
, PT
, &junk
);
4784 /* Record that we did display the line number. */
4785 line_number_displayed
= 1;
4787 /* Make the string to show. */
4788 pint2str (decode_mode_spec_buf
, spec_width
, topline
+ nlines
);
4789 return decode_mode_spec_buf
;
4792 char* p
= decode_mode_spec_buf
;
4793 for (spec_width
-= 2; spec_width
> 0; --spec_width
) *p
++ = ' ';
4795 return decode_mode_spec_buf
;
4805 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
4811 int pos
= marker_position (w
->start
);
4812 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4814 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
4816 if (pos
<= BUF_BEGV (b
))
4821 else if (pos
<= BUF_BEGV (b
))
4825 if (total
> 1000000)
4826 /* Do it differently for a large value, to avoid overflow. */
4827 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4829 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4830 /* We can't normally display a 3-digit number,
4831 so get us a 2-digit number that is close. */
4834 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4835 return decode_mode_spec_buf
;
4839 /* Display percentage of size above the bottom of the screen. */
4842 int toppos
= marker_position (w
->start
);
4843 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
4844 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4846 if (botpos
>= BUF_ZV (b
))
4848 if (toppos
<= BUF_BEGV (b
))
4855 if (total
> 1000000)
4856 /* Do it differently for a large value, to avoid overflow. */
4857 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4859 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4860 /* We can't normally display a 3-digit number,
4861 so get us a 2-digit number that is close. */
4864 if (toppos
<= BUF_BEGV (b
))
4865 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
4867 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4868 return decode_mode_spec_buf
;
4873 /* status of process */
4874 obj
= Fget_buffer_process (w
->buffer
);
4876 return "no process";
4878 obj
= Fsymbol_name (Fprocess_status (obj
));
4882 case 't': /* indicate TEXT or BINARY */
4883 #ifdef MODE_LINE_BINARY_TEXT
4884 return MODE_LINE_BINARY_TEXT (b
);
4890 /* coding-system (not including end-of-line format) */
4892 /* coding-system (including end-of-line type) */
4894 int eol_flag
= (c
== 'Z');
4895 char *p
= decode_mode_spec_buf
;
4897 if (! FRAME_WINDOW_P (f
))
4899 /* No need to mention EOL here--the terminal never needs
4900 to do EOL conversion. */
4901 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, 0);
4902 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, 0);
4904 p
= decode_mode_spec_coding (b
->buffer_file_coding_system
,
4907 #if 0 /* This proves to be annoying; I think we can do without. -- rms. */
4909 obj
= Fget_buffer_process (Fcurrent_buffer ());
4912 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
4914 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
4917 #endif /* subprocesses */
4920 return decode_mode_spec_buf
;
4925 return (char *) XSTRING (obj
)->data
;
4930 /* Count up to COUNT lines starting from START / START_BYTE.
4931 But don't go beyond LIMIT_BYTE.
4932 Return the number of lines thus found (always nonnegative).
4934 Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */
4937 display_count_lines (start
, start_byte
, limit_byte
, count
, byte_pos_ptr
)
4938 int start
, start_byte
, limit_byte
, count
;
4941 register unsigned char *cursor
;
4942 unsigned char *base
;
4944 register int ceiling
;
4945 register unsigned char *ceiling_addr
;
4946 int orig_count
= count
;
4948 /* If we are not in selective display mode,
4949 check only for newlines. */
4950 int selective_display
= (!NILP (current_buffer
->selective_display
)
4951 && !INTEGERP (current_buffer
->selective_display
));
4955 while (start_byte
< limit_byte
)
4957 ceiling
= BUFFER_CEILING_OF (start_byte
);
4958 ceiling
= min (limit_byte
- 1, ceiling
);
4959 ceiling_addr
= BYTE_POS_ADDR (ceiling
) + 1;
4960 base
= (cursor
= BYTE_POS_ADDR (start_byte
));
4963 if (selective_display
)
4964 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
4967 while (*cursor
!= '\n' && ++cursor
!= ceiling_addr
)
4970 if (cursor
!= ceiling_addr
)
4974 start_byte
+= cursor
- base
+ 1;
4975 *byte_pos_ptr
= start_byte
;
4979 if (++cursor
== ceiling_addr
)
4985 start_byte
+= cursor
- base
;
4990 while (start_byte
> limit_byte
)
4992 ceiling
= BUFFER_FLOOR_OF (start_byte
- 1);
4993 ceiling
= max (limit_byte
, ceiling
);
4994 ceiling_addr
= BYTE_POS_ADDR (ceiling
) - 1;
4995 base
= (cursor
= BYTE_POS_ADDR (start_byte
- 1) + 1);
4998 if (selective_display
)
4999 while (--cursor
!= ceiling_addr
5000 && *cursor
!= '\n' && *cursor
!= 015)
5003 while (--cursor
!= ceiling_addr
&& *cursor
!= '\n')
5006 if (cursor
!= ceiling_addr
)
5010 start_byte
+= cursor
- base
+ 1;
5011 *byte_pos_ptr
= start_byte
;
5012 /* When scanning backwards, we should
5013 not count the newline posterior to which we stop. */
5014 return - orig_count
- 1;
5020 /* Here we add 1 to compensate for the last decrement
5021 of CURSOR, which took it past the valid range. */
5022 start_byte
+= cursor
- base
+ 1;
5026 *byte_pos_ptr
= limit_byte
;
5029 return - orig_count
+ count
;
5030 return orig_count
- count
;
5034 /* Display STRING on one line of window W, starting at HPOS.
5035 Display at position VPOS. Caller should have done get_display_line.
5036 If VPOS == -1, display it as the current frame's title.
5037 LENGTH is the length of STRING, or -1 meaning STRING is null-terminated.
5039 TRUNCATE is GLYPH to display at end if truncated. Zero for none.
5041 MINCOL is the first column ok to end at. (Pad with spaces to this col.)
5042 MAXCOL is the last column ok to end at. Truncate here.
5043 -1 for MINCOL or MAXCOL means no explicit minimum or maximum.
5044 Both count from the left edge of the frame, as does HPOS.
5045 The right edge of W is an implicit maximum.
5046 If TRUNCATE is nonzero, the implicit maximum is one column before the edge.
5048 OBEY_WINDOW_WIDTH says to put spaces or vertical bars
5049 at the place where the current window ends in this line
5050 and not display anything beyond there. Otherwise, only MAXCOL
5051 controls where to stop output.
5053 MULTIBYTE can be 0 meaning do not display multibyte chars,
5054 1 meaning do display them, or -1 meaning obey the current buffer's
5055 value of enable_multibyte_characters.
5057 Returns ending hpos. */
5060 display_string (w
, vpos
, string
, length
, hpos
, truncate
,
5061 obey_window_width
, mincol
, maxcol
, multibyte
)
5063 unsigned char *string
;
5067 int obey_window_width
;
5074 int hscroll
= XINT (w
->hscroll
);
5075 int tab_width
= XINT (XBUFFER (w
->buffer
)->tab_width
);
5076 register GLYPH
*start
;
5077 register GLYPH
*end
;
5078 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
5079 struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
5080 GLYPH
*p1start
= desired_glyphs
->glyphs
[vpos
] + hpos
;
5081 int window_width
= XFASTINT (w
->width
);
5083 /* Use the standard display table, not the window's display table.
5084 We don't want the mode line in rot13. */
5085 register struct Lisp_Char_Table
*dp
= 0;
5088 if (multibyte
== -1)
5089 multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
5090 /* Now multibyte is 1 if we should display multibyte characters. */
5092 if (DISP_TABLE_P (Vstandard_display_table
))
5093 dp
= XCHAR_TABLE (Vstandard_display_table
);
5095 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
5098 start
= desired_glyphs
->glyphs
[vpos
];
5100 if (obey_window_width
)
5102 start
+= XFASTINT (w
->left
);
5103 end
= start
+ window_width
- (truncate
!= 0);
5105 if (!WINDOW_RIGHTMOST_P (w
))
5107 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
5111 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
5114 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
5119 if (! obey_window_width
5120 || (maxcol
>= 0 && end
- desired_glyphs
->glyphs
[vpos
] > maxcol
))
5121 end
= desired_glyphs
->glyphs
[vpos
] + maxcol
;
5123 /* Store 0 in charstart for these columns. */
5124 for (i
= (hpos
>= 0 ? hpos
: 0); i
< end
- p1start
+ hpos
; i
++)
5125 desired_glyphs
->charstarts
[vpos
][i
] = 0;
5127 if (maxcol
>= 0 && mincol
> maxcol
)
5131 /* We need this value for multibyte characters. */
5132 length
= strlen (string
);
5134 /* We set truncated to 1 if we get stopped by trying to pass END
5135 (that is, trying to pass MAXCOL.) */
5144 c
= STRING_CHAR_AND_LENGTH (string
, length
, len
);
5146 c
= *string
, len
= 1;
5148 string
+= len
, length
-= len
;
5156 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
5158 p1
= copy_part_of_rope (f
, p1
, start
,
5159 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
5160 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
5163 else if (c
>= 040 && c
< 0177)
5173 if (p1
>= start
&& p1
< end
)
5177 while ((p1
- start
+ hscroll
- (hscroll
> 0)) % tab_width
);
5179 else if (c
< 0200 && ! NILP (buffer_defaults
.ctl_arrow
))
5183 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
5184 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
5185 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
5188 if (p1
>= start
&& p1
< end
)
5194 /* C is a control character or a binary byte data. */
5197 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
5198 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
5199 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
5202 if (p1
>= start
&& p1
< end
)
5203 *p1
= (c
>> 6) + '0';
5205 if (p1
>= start
&& p1
< end
)
5206 *p1
= (7 & (c
>> 3)) + '0';
5208 if (p1
>= start
&& p1
< end
)
5209 *p1
= (7 & c
) + '0';
5214 /* C is a multibyte character. */
5215 int charset
= CHAR_CHARSET (c
);
5216 int columns
= (charset
== CHARSET_COMPOSITION
5217 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
5218 : CHARSET_WIDTH (charset
));
5222 /* Since we can't show the left part of C, fill all
5223 columns with spaces. */
5224 columns
-= start
- p1
;
5233 else if (p1
+ columns
> end
)
5235 /* Since we can't show the right part of C, fill all
5236 columns with TRUNCATE if TRUNCATE is specified. */
5240 *p1
++ = fix_glyph (f
, truncate
, 0);
5241 /* And tell the line is truncated. */
5248 /* We can show the whole glyph of C. */
5251 *p1
++ = c
| GLYPH_MASK_PADDING
;
5259 if (truncate
) *p1
++ = fix_glyph (f
, truncate
, 0);
5261 else if (mincol
>= 0)
5263 end
= desired_glyphs
->glyphs
[vpos
] + mincol
;
5269 register int len
= p1
- desired_glyphs
->glyphs
[vpos
];
5271 if (len
> desired_glyphs
->used
[vpos
])
5272 desired_glyphs
->used
[vpos
] = len
;
5273 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
5279 /* This is like a combination of memq and assq.
5280 Return 1 if PROPVAL appears as an element of LIST
5281 or as the car of an element of LIST.
5282 If PROPVAL is a list, compare each element against LIST
5283 in that way, and return 1 if any element of PROPVAL is found in LIST.
5285 This function cannot quit. */
5288 invisible_p (propval
, list
)
5289 register Lisp_Object propval
;
5292 register Lisp_Object tail
, proptail
;
5293 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5295 register Lisp_Object tem
;
5296 tem
= XCONS (tail
)->car
;
5297 if (EQ (propval
, tem
))
5299 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5302 if (CONSP (propval
))
5303 for (proptail
= propval
; CONSP (proptail
);
5304 proptail
= XCONS (proptail
)->cdr
)
5306 Lisp_Object propelt
;
5307 propelt
= XCONS (proptail
)->car
;
5308 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5310 register Lisp_Object tem
;
5311 tem
= XCONS (tail
)->car
;
5312 if (EQ (propelt
, tem
))
5314 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5321 /* Return 1 if PROPVAL appears as the car of an element of LIST
5322 and the cdr of that element is non-nil.
5323 If PROPVAL is a list, check each element of PROPVAL in that way,
5324 and the first time some element is found,
5325 return 1 if the cdr of that element is non-nil.
5327 This function cannot quit. */
5330 invisible_ellipsis_p (propval
, list
)
5331 register Lisp_Object propval
;
5334 register Lisp_Object tail
, proptail
;
5335 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5337 register Lisp_Object tem
;
5338 tem
= XCONS (tail
)->car
;
5339 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5340 return ! NILP (XCONS (tem
)->cdr
);
5342 if (CONSP (propval
))
5343 for (proptail
= propval
; CONSP (proptail
);
5344 proptail
= XCONS (proptail
)->cdr
)
5346 Lisp_Object propelt
;
5347 propelt
= XCONS (proptail
)->car
;
5348 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5350 register Lisp_Object tem
;
5351 tem
= XCONS (tail
)->car
;
5352 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5353 return ! NILP (XCONS (tem
)->cdr
);
5362 staticpro (&Qmenu_bar_update_hook
);
5363 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
5365 staticpro (&Qoverriding_terminal_local_map
);
5366 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
5368 staticpro (&Qoverriding_local_map
);
5369 Qoverriding_local_map
= intern ("overriding-local-map");
5371 staticpro (&Qwindow_scroll_functions
);
5372 Qwindow_scroll_functions
= intern ("window-scroll-functions");
5374 staticpro (&Qredisplay_end_trigger_functions
);
5375 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
5377 staticpro (&Qinhibit_point_motion_hooks
);
5378 Qinhibit_point_motion_hooks
= intern ("inhibit-point-motion-hooks");
5380 staticpro (&last_arrow_position
);
5381 staticpro (&last_arrow_string
);
5382 last_arrow_position
= Qnil
;
5383 last_arrow_string
= Qnil
;
5385 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
5386 "String (or mode line construct) included (normally) in `mode-line-format'.");
5387 Vglobal_mode_string
= Qnil
;
5389 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
5390 "Marker for where to display an arrow on top of the buffer text.\n\
5391 This must be the beginning of a line in order to work.\n\
5392 See also `overlay-arrow-string'.");
5393 Voverlay_arrow_position
= Qnil
;
5395 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
5396 "String to display as an arrow. See also `overlay-arrow-position'.");
5397 Voverlay_arrow_string
= Qnil
;
5399 DEFVAR_INT ("scroll-step", &scroll_step
,
5400 "*The number of lines to try scrolling a window by when point moves out.\n\
5401 If that fails to bring point back on frame, point is centered instead.\n\
5402 If this is zero, point is always centered after it moves off frame.");
5404 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
5405 "*Scroll up to this many lines, to bring point back on screen.");
5406 scroll_conservatively
= 0;
5408 DEFVAR_INT ("scroll-margin", &scroll_margin
,
5409 "*Number of lines of margin at the top and bottom of a window.\n\
5410 Recenter the window whenever point gets within this many lines\n\
5411 of the top or bottom of the window.");
5414 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
5416 DEFVAR_BOOL ("truncate-partial-width-windows",
5417 &truncate_partial_width_windows
,
5418 "*Non-nil means truncate lines in all windows less than full frame wide.");
5419 truncate_partial_width_windows
= 1;
5421 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
5422 "*Non-nil means use inverse video for the mode line.");
5423 mode_line_inverse_video
= 1;
5425 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
5426 "*Maximum buffer size (in characters) for line number display\n\
5427 If the buffer is bigger than this, the line number does not appear\n\
5428 in the mode line..");
5429 line_number_display_limit
= 1000000;
5431 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
5432 "*Non-nil means highlight region even in nonselected windows.");
5433 highlight_nonselected_windows
= 0;
5435 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
5436 "Non-nil if more than one frame is visible on this display.\n\
5437 Minibuffer-only frames don't count, but iconified frames do.\n\
5438 This variable is not guaranteed to be accurate except while processing\n\
5439 `frame-title-format' and `icon-title-format'.");
5441 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
5442 "Template for displaying the titlebar of visible frames.\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').");
5447 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
5448 "Template for displaying the titlebar of an iconified frame.\n\
5449 \(Assuming the window manager supports this feature.)\n\
5450 This variable has the same structure as `mode-line-format' (which see),\n\
5451 and is used only on frames for which no explicit name has been set\n\
5452 \(see `modify-frame-parameters').");
5454 = Vframe_title_format
5455 = Fcons (intern ("multiple-frames"),
5456 Fcons (build_string ("%b"),
5457 Fcons (Fcons (build_string (""),
5458 Fcons (intern ("invocation-name"),
5459 Fcons (build_string ("@"),
5460 Fcons (intern ("system-name"),
5464 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
5465 "Maximum number of lines to keep in the message log buffer.\n\
5466 If nil, disable message logging. If t, log messages but don't truncate\n\
5467 the buffer when it becomes large.");
5468 XSETFASTINT (Vmessage_log_max
, 50);
5470 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
5471 "Functions called before redisplay, if window sizes have changed.\n\
5472 The value should be a list of functions that take one argument.\n\
5473 Just before redisplay, for each frame, if any of its windows have changed\n\
5474 size since the last redisplay, or have been split or deleted,\n\
5475 all the functions in the list are called, with the frame as argument.");
5476 Vwindow_size_change_functions
= Qnil
;
5478 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
5479 "List of functions to call before redisplaying a window with scrolling.\n\
5480 Each function is called with two arguments, the window\n\
5481 and its new display-start position. Note that the value of `window-end'\n\
5482 is not valid when these functions are called.");
5483 Vwindow_scroll_functions
= Qnil
;
5485 DEFVAR_INT ("minibuffer-scroll-overlap", &minibuffer_scroll_overlap
,
5486 "*Number of characters of overlap when scrolling a one-line window.\n\
5487 This commonly affects the minibuffer window, hence the name of the variable.");
5488 minibuffer_scroll_overlap
= 20;
5491 /* initialize the window system */
5495 Lisp_Object root_window
;
5496 #ifndef COMPILER_REGISTER_BUG
5498 #endif /* COMPILER_REGISTER_BUG */
5499 struct window
*mini_w
;
5501 this_line_bufpos
= 0;
5503 mini_w
= XWINDOW (minibuf_window
);
5504 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
5506 echo_area_glyphs
= 0;
5507 previous_echo_glyphs
= 0;
5509 if (!noninteractive
)
5511 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
5512 XSETFASTINT (XWINDOW (root_window
)->top
, FRAME_MENU_BAR_LINES (f
));
5513 set_window_height (root_window
,
5514 FRAME_HEIGHT (f
) - 1 - FRAME_MENU_BAR_LINES (f
),
5516 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
5517 set_window_height (minibuf_window
, 1, 0);
5519 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
5520 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));