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"
44 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
45 extern void set_frame_menubar ();
46 extern int pending_menu_activation
;
49 extern int interrupt_input
;
50 extern int command_loop_level
;
52 extern int minibuffer_auto_raise
;
54 extern Lisp_Object Qface
;
56 extern Lisp_Object Voverriding_local_map
;
57 extern Lisp_Object Voverriding_local_map_menu_flag
;
59 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
60 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
61 Lisp_Object Qredisplay_end_trigger_functions
;
63 /* Nonzero means print newline to stdout before next minibuffer message. */
65 int noninteractive_need_newline
;
67 /* Nonzero means print newline to message log before next message. */
69 static int message_log_need_newline
;
71 #define min(a, b) ((a) < (b) ? (a) : (b))
72 #define max(a, b) ((a) > (b) ? (a) : (b))
73 #define minmax(floor, val, ceil) \
74 ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val))
76 /* The buffer position of the first character appearing
77 entirely or partially on the current frame line.
78 Or zero, which disables the optimization for the current frame line. */
79 static int this_line_bufpos
;
81 /* Number of characters past the end of this line,
82 including the terminating newline */
83 static int this_line_endpos
;
85 /* The vertical position of this frame line. */
86 static int this_line_vpos
;
88 /* Hpos value for start of display on this frame line.
89 Usually zero, but negative if first character really began
91 static int this_line_start_hpos
;
93 /* Buffer that this_line variables are describing. */
94 static struct buffer
*this_line_buffer
;
96 /* Value of echo_area_glyphs when it was last acted on.
97 If this is nonzero, there is a message on the frame
98 in the minibuffer and it should be erased as soon
99 as it is no longer requested to appear. */
100 char *previous_echo_glyphs
;
102 /* Nonzero means truncate lines in all windows less wide than the frame */
103 int truncate_partial_width_windows
;
105 /* Nonzero means we have more than one non-minibuffer-only frame.
106 Not guaranteed to be accurate except while parsing frame-title-format. */
109 Lisp_Object Vglobal_mode_string
;
111 /* Marker for where to display an arrow on top of the buffer text. */
112 Lisp_Object Voverlay_arrow_position
;
114 /* String to display for the arrow. */
115 Lisp_Object Voverlay_arrow_string
;
117 /* Values of those variables at last redisplay.
118 However, if Voverlay_arrow_position is a marker,
119 last_arrow_position is its numerical position. */
120 static Lisp_Object last_arrow_position
, last_arrow_string
;
122 /* Like mode-line-format, but for the titlebar on a visible frame. */
123 Lisp_Object Vframe_title_format
;
125 /* Like mode-line-format, but for the titlebar on an iconified frame. */
126 Lisp_Object Vicon_title_format
;
128 /* List of functions to call when a window's size changes. These
129 functions get one arg, a frame on which one or more windows' sizes
131 static Lisp_Object Vwindow_size_change_functions
;
133 Lisp_Object Qmenu_bar_update_hook
;
135 /* Nonzero if overlay arrow has been displayed once in this window. */
136 static int overlay_arrow_seen
;
138 /* Nonzero if visible end of buffer has already been displayed once
139 in this window. (We need this variable in case there are overlay
140 strings that get displayed there.) */
141 static int zv_strings_seen
;
143 /* Nonzero means highlight the region even in nonselected windows. */
144 static int highlight_nonselected_windows
;
146 /* If cursor motion alone moves point off frame,
147 Try scrolling this many lines up or down if that will bring it back. */
148 static int scroll_step
;
150 /* Non-0 means scroll just far enough to bring point back on the screen,
152 static int scroll_conservatively
;
154 /* Recenter the window whenever point gets within this many lines
155 of the top or bottom of the window. */
158 /* Number of characters of overlap to show,
159 when scrolling a one-line window such as a minibuffer. */
160 static int minibuffer_scroll_overlap
;
162 /* Nonzero if try_window_id has made blank lines at window bottom
163 since the last redisplay that paused */
164 static int blank_end_of_window
;
166 /* Number of windows showing the buffer of the selected window
167 (or another buffer with the same base buffer).
168 keyboard.c refers to this. */
171 /* display_text_line sets these to the frame position (origin 0) of point,
172 whether the window is selected or not.
173 Set one to -1 first to determine whether point was found afterwards. */
175 static int cursor_vpos
;
176 static int cursor_hpos
;
178 static int debug_end_pos
;
180 /* Nonzero means display mode line highlighted */
181 int mode_line_inverse_video
;
183 static void redisplay_internal ();
184 static int message_log_check_duplicate ();
185 static void echo_area_display ();
186 void mark_window_display_accurate ();
187 static void redisplay_windows ();
188 static void redisplay_window ();
189 static void update_menu_bar ();
190 static void try_window ();
191 static int try_window_id ();
192 static struct position
*display_text_line ();
193 static void display_mode_line ();
194 static int display_mode_element ();
195 static char *decode_mode_spec ();
196 static int display_string ();
197 static void display_menu_bar ();
198 static int display_count_lines ();
200 /* Prompt to display in front of the minibuffer contents */
201 Lisp_Object minibuf_prompt
;
203 /* Width in columns of current minibuffer prompt. */
204 int minibuf_prompt_width
;
206 /* Message to display instead of minibuffer contents
207 This is what the functions error and message make,
208 and command echoing uses it as well.
209 It overrides the minibuf_prompt as well as the buffer. */
210 char *echo_area_glyphs
;
212 /* This is the length of the message in echo_area_glyphs. */
213 int echo_area_glyphs_length
;
215 /* This is the window where the echo area message was displayed.
216 It is always a minibuffer window, but it may not be the
217 same window currently active as a minibuffer. */
218 Lisp_Object echo_area_window
;
220 /* Nonzero means multibyte characters were enabled when the echo area
221 message was specified. */
222 int message_enable_multibyte
;
224 /* true iff we should redraw the mode lines on the next redisplay */
225 int update_mode_lines
;
227 /* Smallest number of characters before the gap
228 at any time since last redisplay that finished.
229 Valid for current buffer when try_window_id can be called. */
232 /* Smallest number of characters after the gap
233 at any time since last redisplay that finished.
234 Valid for current buffer when try_window_id can be called. */
237 /* MODIFF as of last redisplay that finished;
238 if it matches MODIFF, and overlay_unchanged_modified
239 matches OVERLAY_MODIFF, that means beg_unchanged and end_unchanged
240 contain no useful information */
241 int unchanged_modified
;
243 /* OVERLAY_MODIFF as of last redisplay that finished. */
244 int overlay_unchanged_modified
;
246 /* Nonzero if window sizes or contents have changed
247 since last redisplay that finished */
248 int windows_or_buffers_changed
;
250 /* Nonzero after display_mode_line if %l was used
251 and it displayed a line number. */
252 int line_number_displayed
;
254 /* Maximum buffer size for which to display line numbers. */
255 static int line_number_display_limit
;
257 /* Number of lines to keep in the message log buffer.
258 t means infinite. nil means don't log at all. */
259 Lisp_Object Vmessage_log_max
;
261 #define COERCE_MARKER(X) \
262 (MARKERP ((X)) ? Fmarker_position (X) : (X))
264 static int pos_tab_offset
P_ ((struct window
*, int, int));
266 /* Output a newline in the *Messages* buffer if "needs" one. */
269 message_log_maybe_newline ()
271 if (message_log_need_newline
)
272 message_dolog ("", 0, 1, 0);
276 /* Add a string to the message log, optionally terminated with a newline.
277 This function calls low-level routines in order to bypass text property
278 hooks, etc. which might not be safe to run.
279 MULTIBYTE, if nonzero, means interpret the contents of M as multibyte. */
282 message_dolog (m
, len
, nlflag
, multibyte
)
284 int len
, nlflag
, multibyte
;
286 if (!NILP (Vmessage_log_max
))
288 struct buffer
*oldbuf
;
289 Lisp_Object oldpoint
, oldbegv
, oldzv
;
290 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
291 int point_at_end
= 0;
293 Lisp_Object old_deactivate_mark
;
295 old_deactivate_mark
= Vdeactivate_mark
;
296 oldbuf
= current_buffer
;
297 Fset_buffer (Fget_buffer_create (build_string ("*Messages*")));
298 current_buffer
->undo_list
= Qt
;
300 oldpoint
= Fpoint_marker ();
301 oldbegv
= Fpoint_min_marker ();
302 oldzv
= Fpoint_max_marker ();
310 BEGV_BYTE
= BEG_BYTE
;
313 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
315 /* Insert the string--maybe converting multibyte to single byte
316 or vice versa, so that all the text fits the buffer. */
318 && NILP (current_buffer
->enable_multibyte_characters
))
320 int c
, i
= 0, nbytes
;
321 /* Convert a multibyte string to single-byte
322 for the *Message* buffer. */
325 c
= STRING_CHAR (m
+ i
, len
- i
);
326 i
+= XFASTINT (Fchar_bytes (make_number (c
)));
327 /* Truncate the character to its last byte--we can only hope
328 the user is happy with the character he gets,
329 since if it isn't right, there is no way to do it right. */
335 && ! NILP (current_buffer
->enable_multibyte_characters
))
338 unsigned char *msg
= (unsigned char *) m
;
339 /* Convert a single-byte string to multibyte
340 for the *Message* buffer. */
343 int c
= unibyte_char_to_multibyte (msg
[i
++]);
348 insert_1 (m
, len
, 1, 0, 0);
352 int this_bol
, this_bol_byte
, prev_bol
, prev_bol_byte
, dup
;
353 insert_1 ("\n", 1, 1, 0, 0);
355 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
, -2, 0);
357 this_bol_byte
= PT_BYTE
;
361 scan_newline (PT
, PT_BYTE
, BEG
, BEG_BYTE
, -2, 0);
363 prev_bol_byte
= PT_BYTE
;
365 dup
= message_log_check_duplicate (prev_bol
, prev_bol_byte
,
366 this_bol
, this_bol_byte
);
369 del_range_both (prev_bol
, prev_bol_byte
,
370 this_bol
, this_bol_byte
, 0);
376 /* If you change this format, don't forget to also
377 change message_log_check_duplicate. */
378 sprintf (dupstr
, " [%d times]", dup
);
379 duplen
= strlen (dupstr
);
380 TEMP_SET_PT_BOTH (Z
- 1, Z_BYTE
- 1);
381 insert_1 (dupstr
, duplen
, 1, 0, 1);
386 if (NATNUMP (Vmessage_log_max
))
388 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
,
389 -XFASTINT (Vmessage_log_max
) - 1, 0);
390 del_range_both (BEG
, BEG_BYTE
, PT
, PT_BYTE
, 0);
393 BEGV
= XMARKER (oldbegv
)->charpos
;
394 BEGV_BYTE
= marker_byte_position (oldbegv
);
403 ZV
= XMARKER (oldzv
)->charpos
;
404 ZV_BYTE
= marker_byte_position (oldzv
);
408 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
410 Fgoto_char (oldpoint
);
412 free_marker (oldpoint
);
413 free_marker (oldbegv
);
416 set_buffer_internal (oldbuf
);
417 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
418 message_log_need_newline
= !nlflag
;
419 Vdeactivate_mark
= old_deactivate_mark
;
423 /* We are at the end of the buffer after just having inserted a newline.
424 (Note: We depend on the fact we won't be crossing the gap.)
425 Check to see if the most recent message looks a lot like the previous one.
426 Return 0 if different, 1 if the new one should just replace it, or a
427 value N > 1 if we should also append " [N times]". */
430 message_log_check_duplicate (prev_bol
, prev_bol_byte
, this_bol
, this_bol_byte
)
431 int prev_bol
, this_bol
;
432 int prev_bol_byte
, this_bol_byte
;
435 int len
= Z
- 1 - this_bol
;
437 unsigned char *p1
= BUF_BYTE_ADDRESS (current_buffer
, prev_bol_byte
);
438 unsigned char *p2
= BUF_BYTE_ADDRESS (current_buffer
, this_bol_byte
);
440 for (i
= 0; i
< len
; i
++)
442 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.'
451 if (*p1
++ == ' ' && *p1
++ == '[')
454 while (*p1
>= '0' && *p1
<= '9')
455 n
= n
* 10 + *p1
++ - '0';
456 if (strncmp (p1
, " times]\n", 8) == 0)
462 /* Display an echo area message M with a specified length of LEN chars.
463 The string may include null characters. If M is 0, clear out any
464 existing message, and let the minibuffer text show through.
466 The buffer M must continue to exist until after the echo area
467 gets cleared or some other message gets displayed there.
469 Do not pass text that is stored in a Lisp string.
470 Do not pass text in a buffer that was alloca'd. */
473 message2 (m
, len
, multibyte
)
478 /* First flush out any partial line written with print. */
479 message_log_maybe_newline ();
481 message_dolog (m
, len
, 1, multibyte
);
482 message2_nolog (m
, len
, multibyte
);
486 /* The non-logging counterpart of message2. */
489 message2_nolog (m
, len
, multibyte
)
493 message_enable_multibyte
= multibyte
;
497 if (noninteractive_need_newline
)
499 noninteractive_need_newline
= 0;
501 fwrite (m
, len
, 1, stderr
);
502 if (cursor_in_echo_area
== 0)
503 fprintf (stderr
, "\n");
506 /* A null message buffer means that the frame hasn't really been
507 initialized yet. Error messages get reported properly by
508 cmd_error, so this must be just an informative message; toss it. */
509 else if (INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
511 Lisp_Object mini_window
;
514 /* Get the frame containing the minibuffer
515 that the selected frame is using. */
516 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
517 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
519 FRAME_SAMPLE_VISIBILITY (f
);
520 if (FRAME_VISIBLE_P (selected_frame
)
521 && ! FRAME_VISIBLE_P (f
))
522 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
526 echo_area_glyphs
= m
;
527 echo_area_glyphs_length
= len
;
529 if (minibuffer_auto_raise
)
530 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
533 echo_area_glyphs
= previous_echo_glyphs
= 0;
535 do_pending_window_change ();
536 echo_area_display ();
537 update_frame (f
, 1, 1);
538 do_pending_window_change ();
539 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
540 (*frame_up_to_date_hook
) (f
);
544 /* Display in echo area the null-terminated ASCII-only string M.
545 If M is 0, clear out any existing message,
546 and let the minibuffer text show through.
548 The string M must continue to exist until after the echo area
549 gets cleared or some other message gets displayed there.
551 Do not pass text that is stored in a Lisp string.
552 Do not pass text in a buffer that was alloca'd. */
558 message2 (m
, (m
? strlen (m
) : 0), 0);
565 message2_nolog (m
, (m
? strlen (m
) : 0), 0);
568 /* Display a message M which contains a single %s
569 which gets replaced with STRING. */
572 message_with_string (m
, string
, log
)
581 if (noninteractive_need_newline
)
583 noninteractive_need_newline
= 0;
584 fprintf (stderr
, m
, XSTRING (string
)->data
);
585 if (cursor_in_echo_area
== 0)
586 fprintf (stderr
, "\n");
590 else if (INTERACTIVE
)
592 /* The frame whose minibuffer we're going to display the message on.
593 It may be larger than the selected frame, so we need
594 to use its buffer, not the selected frame's buffer. */
595 Lisp_Object mini_window
;
598 /* Get the frame containing the minibuffer
599 that the selected frame is using. */
600 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
601 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
603 /* A null message buffer means that the frame hasn't really been
604 initialized yet. Error messages get reported properly by
605 cmd_error, so this must be just an informative message; toss it. */
606 if (FRAME_MESSAGE_BUF (f
))
610 a
[0] = (char *) XSTRING (string
)->data
;
612 len
= doprnt (FRAME_MESSAGE_BUF (f
),
613 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
616 message2 (FRAME_MESSAGE_BUF (f
), len
,
617 STRING_MULTIBYTE (string
));
619 message2_nolog (FRAME_MESSAGE_BUF (f
), len
,
620 STRING_MULTIBYTE (string
));
622 /* Print should start at the beginning of the message
624 message_buf_print
= 0;
629 /* Truncate what will be displayed in the echo area
630 the next time we display it--but don't redisplay it now. */
633 truncate_echo_area (len
)
636 /* A null message buffer means that the frame hasn't really been
637 initialized yet. Error messages get reported properly by
638 cmd_error, so this must be just an informative message; toss it. */
639 if (!noninteractive
&& INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
640 echo_area_glyphs_length
= len
;
643 /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print;
644 zero if being used by message. */
645 int message_buf_print
;
647 /* Dump an informative message to the minibuf. If M is 0, clear out
648 any existing message, and let the minibuffer text show through. */
652 message (m
, a1
, a2
, a3
)
654 EMACS_INT a1
, a2
, a3
;
660 if (noninteractive_need_newline
)
662 noninteractive_need_newline
= 0;
663 fprintf (stderr
, m
, a1
, a2
, a3
);
664 if (cursor_in_echo_area
== 0)
665 fprintf (stderr
, "\n");
669 else if (INTERACTIVE
)
671 /* The frame whose minibuffer we're going to display the message on.
672 It may be larger than the selected frame, so we need
673 to use its buffer, not the selected frame's buffer. */
674 Lisp_Object mini_window
;
677 /* Get the frame containing the minibuffer
678 that the selected frame is using. */
679 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
680 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
682 /* A null message buffer means that the frame hasn't really been
683 initialized yet. Error messages get reported properly by
684 cmd_error, so this must be just an informative message; toss it. */
685 if (FRAME_MESSAGE_BUF (f
))
696 len
= doprnt (FRAME_MESSAGE_BUF (f
),
697 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
699 len
= doprnt (FRAME_MESSAGE_BUF (f
),
700 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3,
702 #endif /* NO_ARG_ARRAY */
704 message2 (FRAME_MESSAGE_BUF (f
), len
, 0);
709 /* Print should start at the beginning of the message
711 message_buf_print
= 0;
716 /* The non-logging version of message. */
718 message_nolog (m
, a1
, a2
, a3
)
720 EMACS_INT a1
, a2
, a3
;
722 Lisp_Object old_log_max
;
723 old_log_max
= Vmessage_log_max
;
724 Vmessage_log_max
= Qnil
;
725 message (m
, a1
, a2
, a3
);
726 Vmessage_log_max
= old_log_max
;
732 message2 (echo_area_glyphs
, echo_area_glyphs_length
,
733 ! NILP (current_buffer
->enable_multibyte_characters
));
741 Lisp_Object mini_window
;
743 /* Choose the minibuffer window for this display.
744 It is the minibuffer window used by the selected frame. */
745 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
746 /* This is the frame that window is in. */
747 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
749 if (! FRAME_VISIBLE_P (f
))
754 redraw_garbaged_frames ();
758 if (echo_area_glyphs
|| minibuf_level
== 0)
762 echo_area_window
= mini_window
;
764 vpos
= XFASTINT (XWINDOW (mini_window
)->top
);
765 get_display_line (f
, vpos
, 0);
767 /* Make sure the columns that overlap a left-hand scroll bar
769 for (i
= 0; i
< FRAME_LEFT_SCROLL_BAR_WIDTH (f
); i
++)
770 f
->desired_glyphs
->glyphs
[vpos
][i
] = SPACEGLYPH
;
772 display_string (XWINDOW (mini_window
), vpos
,
773 echo_area_glyphs
? echo_area_glyphs
: "",
774 echo_area_glyphs
? echo_area_glyphs_length
: -1,
775 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
777 FRAME_WIDTH (f
) + FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
778 message_enable_multibyte
);
780 #if 0 /* This just gets in the way. update_frame does the job. */
781 /* If desired cursor location is on this line, put it at end of text */
782 if (cursor_in_echo_area
)
783 FRAME_CURSOR_Y (f
) = vpos
;
784 if (FRAME_CURSOR_Y (f
) == vpos
)
785 FRAME_CURSOR_X (f
) = FRAME_DESIRED_GLYPHS (f
)->used
[vpos
];
788 /* Fill the rest of the minibuffer window with blank lines. */
793 i
< vpos
+ XFASTINT (XWINDOW (mini_window
)->height
); i
++)
795 get_display_line (f
, i
, 0);
796 /* We don't use FRAME_SCROLL_BAR_WIDTH (f) as the starting
797 hpos, because it is good to clear whatever is behind the
798 scroll bar. This does not affect the scroll bar itself. */
799 display_string (XWINDOW (mini_window
), i
,
802 0, FRAME_WIDTH (f
) + FRAME_SCROLL_BAR_WIDTH (f
),
807 else if (!EQ (mini_window
, selected_window
))
808 windows_or_buffers_changed
++;
810 if (EQ (mini_window
, selected_window
))
811 this_line_bufpos
= 0;
813 previous_echo_glyphs
= echo_area_glyphs
;
816 /* Update frame titles. */
818 #ifdef HAVE_WINDOW_SYSTEM
819 static char frame_title_buf
[512];
820 static char *frame_title_ptr
;
823 store_frame_title (str
, mincol
, maxcol
)
828 if (maxcol
< 0 || maxcol
>= sizeof(frame_title_buf
))
829 maxcol
= sizeof (frame_title_buf
);
830 limit
= &frame_title_buf
[maxcol
];
831 while (*str
!= '\0' && frame_title_ptr
< limit
)
832 *frame_title_ptr
++ = *str
++;
833 while (frame_title_ptr
< &frame_title_buf
[mincol
])
834 *frame_title_ptr
++ = ' ';
835 return frame_title_ptr
- frame_title_buf
;
839 x_consider_frame_title (frame
)
845 FRAME_PTR f
= XFRAME (frame
);
847 if (!(FRAME_WINDOW_P (f
) || FRAME_MINIBUF_ONLY_P (f
) || f
->explicit_name
))
850 /* Do we have more than one visible frame on this X display? */
854 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
856 FRAME_PTR tf
= XFRAME (XCONS (tail
)->car
);
858 if (tf
!= f
&& FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
859 && !FRAME_MINIBUF_ONLY_P (tf
)
860 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
864 multiple_frames
= CONSP (tail
);
867 obuf
= current_buffer
;
868 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
869 fmt
= (FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
);
870 frame_title_ptr
= frame_title_buf
;
871 len
= display_mode_element (XWINDOW (f
->selected_window
), 0, 0, 0,
872 0, sizeof (frame_title_buf
), fmt
);
874 set_buffer_internal (obuf
);
875 /* Set the name only if it's changed. This avoids consing
876 in the common case where it hasn't. (If it turns out that we've
877 already wasted too much time by walking through the list with
878 display_mode_element, then we might need to optimize at a higher
880 if (! STRINGP (f
->name
) || STRING_BYTES (XSTRING (f
->name
)) != len
881 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
882 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
885 #define frame_title_ptr ((char *)0)
886 #define store_frame_title(str, mincol, maxcol) 0
889 /* Prepare for redisplay by updating menu-bar item lists when appropriate.
890 This can call eval. */
895 register struct window
*w
= XWINDOW (selected_window
);
897 struct gcpro gcpro1
, gcpro2
;
899 all_windows
= (update_mode_lines
|| buffer_shared
> 1
900 || windows_or_buffers_changed
);
902 /* Update all frame titles based on their buffer names, etc.
903 We do this before the menu bars so that the buffer-menu
904 will show the up-to-date frame titles.
906 This used to be done after the menu bars, for a reason that
907 was stated as follows but which I do not understand:
908 "We do this after the menu bars so that the frame will first
909 create its menu bar using the name `emacs' if no other name
910 has yet been specified."
911 I think that is no longer a concern. */
912 #ifdef HAVE_WINDOW_SYSTEM
913 if (windows_or_buffers_changed
|| update_mode_lines
)
915 Lisp_Object tail
, frame
;
917 FOR_EACH_FRAME (tail
, frame
)
918 if (FRAME_VISIBLE_P (XFRAME (frame
))
919 || FRAME_ICONIFIED_P (XFRAME (frame
)))
920 x_consider_frame_title (frame
);
924 /* Update the menu bar item lists, if appropriate.
925 This has to be done before any actual redisplay
926 or generation of display lines. */
929 Lisp_Object tail
, frame
;
930 int count
= specpdl_ptr
- specpdl
;
932 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
934 FOR_EACH_FRAME (tail
, frame
)
936 /* If a window on this frame changed size,
937 report that to the user and clear the size-change flag. */
938 if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)))
940 Lisp_Object functions
;
941 /* Clear flag first in case we get error below. */
942 FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)) = 0;
943 functions
= Vwindow_size_change_functions
;
944 GCPRO2 (tail
, functions
);
945 while (CONSP (functions
))
947 call1 (XCONS (functions
)->car
, frame
);
948 functions
= XCONS (functions
)->cdr
;
953 update_menu_bar (XFRAME (frame
), 0);
957 unbind_to (count
, Qnil
);
960 update_menu_bar (selected_frame
, 1);
962 /* Motif needs this. See comment in xmenu.c.
963 Turn it off when pending_menu_activation is not defined. */
965 pending_menu_activation
= 0;
969 /* Do a frame update, taking possible shortcuts into account.
970 This is the main external entry point for redisplay.
972 If the last redisplay displayed an echo area message and that
973 message is no longer requested, we clear the echo area
974 or bring back the minibuffer if that is in use.
976 Do not call eval from within this function.
977 Calls to eval after the call to echo_area_display would confuse
978 the display_line mechanism and would cause a crash.
979 Calls to eval before that point will work most of the time,
980 but can still lose, because this function
981 can be called from signal handlers; with alarms set up;
982 or with synchronous processes running.
984 See Fcall_process; if you called it from here, it could be
985 entered recursively. */
987 static int do_verify_charstarts
;
989 /* Counter is used to clear the face cache
990 no more than once ever 1000 redisplays. */
991 static int clear_face_cache_count
;
993 /* Record the previous terminal frame we displayed. */
994 static FRAME_PTR previous_terminal_frame
;
999 redisplay_internal (0);
1002 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay
1003 is not in response to any user action; therefore, we should
1004 preserve the echo area. (Actually, our caller does that job.)
1005 Perhaps in the future avoid recentering windows
1006 if it is not necessary; currently that causes some problems. */
1009 redisplay_internal (preserve_echo_area
)
1010 int preserve_echo_area
;
1012 register struct window
*w
= XWINDOW (selected_window
);
1014 int must_finish
= 0;
1016 register int tlbufpos
, tlendpos
;
1017 struct position pos
;
1018 int number_of_visible_frames
;
1023 #ifdef USE_X_TOOLKIT
1024 if (popup_activated ())
1030 if (! FRAME_WINDOW_P (selected_frame
)
1031 && previous_terminal_frame
!= selected_frame
)
1033 /* Since frames on an ASCII terminal share the same display area,
1034 displaying a different frame means redisplay the whole thing. */
1035 windows_or_buffers_changed
++;
1036 SET_FRAME_GARBAGED (selected_frame
);
1037 XSETFRAME (Vterminal_frame
, selected_frame
);
1039 previous_terminal_frame
= selected_frame
;
1041 /* Set the visible flags for all frames.
1042 Do this before checking for resized or garbaged frames; they want
1043 to know if their frames are visible.
1044 See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */
1046 Lisp_Object tail
, frame
;
1048 number_of_visible_frames
= 0;
1050 FOR_EACH_FRAME (tail
, frame
)
1052 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1054 if (FRAME_VISIBLE_P (XFRAME (frame
)))
1055 number_of_visible_frames
++;
1057 /* Clear out all the display lines in which we will generate the
1058 glyphs to display. */
1059 init_desired_glyphs (XFRAME (frame
));
1063 /* Notice any pending interrupt request to change frame size. */
1064 do_pending_window_change ();
1068 redraw_garbaged_frames ();
1072 prepare_menu_bars ();
1074 if (windows_or_buffers_changed
)
1075 update_mode_lines
++;
1077 /* Detect case that we need to write or remove a star in the mode line. */
1078 if ((SAVE_MODIFF
< MODIFF
) != !NILP (w
->last_had_star
))
1080 w
->update_mode_line
= Qt
;
1081 if (buffer_shared
> 1)
1082 update_mode_lines
++;
1085 /* If %c is in use, update it if needed. */
1086 if (!NILP (w
->column_number_displayed
)
1087 /* This alternative quickly identifies a common case
1088 where no change is needed. */
1089 && !(PT
== XFASTINT (w
->last_point
)
1090 && XFASTINT (w
->last_modified
) >= MODIFF
1091 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1092 && XFASTINT (w
->column_number_displayed
) != current_column ())
1093 w
->update_mode_line
= Qt
;
1095 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
1097 all_windows
= update_mode_lines
|| buffer_shared
> 1;
1099 /* If specs for an arrow have changed, do thorough redisplay
1100 to ensure we remove any arrow that should no longer exist. */
1101 if (! EQ (COERCE_MARKER (Voverlay_arrow_position
), last_arrow_position
)
1102 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
1105 /* Normally the message* functions will have already displayed and
1106 updated the echo area, but the frame may have been trashed, or
1107 the update may have been preempted, so display the echo area
1109 if (echo_area_glyphs
|| previous_echo_glyphs
)
1111 echo_area_display ();
1115 /* If showing region, and mark has changed, must redisplay whole window. */
1116 if (((!NILP (Vtransient_mark_mode
)
1117 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1118 != !NILP (w
->region_showing
))
1119 || (!NILP (w
->region_showing
)
1120 && !EQ (w
->region_showing
,
1121 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
1122 this_line_bufpos
= -1;
1124 tlbufpos
= this_line_bufpos
;
1125 tlendpos
= this_line_endpos
;
1126 if (!all_windows
&& tlbufpos
> 0 && NILP (w
->update_mode_line
)
1127 && !current_buffer
->clip_changed
1128 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
1129 && !FRAME_OBSCURED_P (XFRAME (w
->frame
))
1130 /* Make sure recorded data applies to current buffer, etc */
1131 && this_line_buffer
== current_buffer
1132 && current_buffer
== XBUFFER (w
->buffer
)
1133 && NILP (w
->force_start
)
1134 /* Point must be on the line that we have info recorded about */
1136 && PT
<= Z
- tlendpos
1137 /* All text outside that line, including its final newline,
1138 must be unchanged */
1139 && ((XFASTINT (w
->last_modified
) >= MODIFF
1140 && (XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
))
1141 || (beg_unchanged
>= tlbufpos
- 1
1143 /* If selective display, can't optimize
1144 if the changes start at the beginning of the line. */
1145 && ((INTEGERP (current_buffer
->selective_display
)
1146 && XINT (current_buffer
->selective_display
) > 0
1147 ? (beg_unchanged
>= tlbufpos
1150 && end_unchanged
>= tlendpos
1151 && Z
- GPT
>= tlendpos
)))
1153 int tlbufpos_byte
= CHAR_TO_BYTE (tlbufpos
);
1154 if (tlbufpos
> BEGV
&& FETCH_BYTE (tlbufpos_byte
- 1) != '\n'
1156 || FETCH_BYTE (tlbufpos_byte
) == '\n'))
1157 /* Former continuation line has disappeared by becoming empty */
1159 else if (XFASTINT (w
->last_modified
) < MODIFF
1160 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
1161 || MINI_WINDOW_P (w
))
1163 /* We have to handle the case of continuation around a
1164 wide-column character (See the comment in indent.c around
1167 For instance, in the following case:
1169 -------- Insert --------
1170 K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars.
1171 J_I_ ==> J_I_ `^^' are cursors.
1175 As we have to redraw the line above, we should goto cancel. */
1177 struct position val
;
1179 int opoint
= PT
, opoint_byte
= PT_BYTE
;
1181 scan_newline (tlbufpos
, tlbufpos_byte
, BEGV
, BEGV_BYTE
, -1, 1);
1183 val
= *compute_motion (PT
, 0,
1184 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1187 1 << (BITS_PER_SHORT
- 1),
1188 1 << (BITS_PER_SHORT
- 1),
1189 window_internal_width (w
) - 1,
1190 XINT (w
->hscroll
), 0, w
);
1191 SET_PT_BOTH (opoint
, opoint_byte
);
1192 if (val
.hpos
!= this_line_start_hpos
)
1196 overlay_arrow_seen
= 0;
1197 zv_strings_seen
= 0;
1198 display_text_line (w
, tlbufpos
, tlbufpos_byte
,
1199 this_line_vpos
, this_line_start_hpos
,
1200 pos_tab_offset (w
, tlbufpos
, tlbufpos_byte
), 0);
1201 /* If line contains point, is not continued,
1202 and ends at same distance from eob as before, we win */
1203 if (cursor_vpos
>= 0 && this_line_bufpos
1204 && this_line_endpos
== tlendpos
)
1206 /* If this is not the window's last line,
1207 we must adjust the charstarts of the lines below. */
1208 if (this_line_vpos
+ 1
1209 < XFASTINT (w
->top
) + window_internal_height (w
))
1211 int left
= WINDOW_LEFT_MARGIN (w
);
1212 int *charstart_next_line
1213 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[this_line_vpos
+ 1];
1216 if (Z
- tlendpos
== ZV
)
1217 /* This line ends at end of (accessible part of) buffer.
1218 There is no newline to count. */
1219 adjust
= Z
- tlendpos
- charstart_next_line
[left
];
1221 /* This line ends in a newline.
1222 Must take account of the newline and the rest of the
1223 text that follows. */
1224 adjust
= Z
- tlendpos
+ 1 - charstart_next_line
[left
];
1226 adjust_window_charstarts (w
, this_line_vpos
, adjust
);
1229 if (!WINDOW_FULL_WIDTH_P (w
))
1230 preserve_other_columns (w
);
1236 else if (PT
== XFASTINT (w
->last_point
)
1237 /* Make sure the cursor was last displayed
1238 in this window. Otherwise we have to reposition it. */
1239 && XINT (w
->top
) <= FRAME_CURSOR_Y (selected_frame
)
1240 && (XINT (w
->top
) + XINT (w
->height
)
1241 > FRAME_CURSOR_Y (selected_frame
)))
1245 do_pending_window_change ();
1250 /* If highlighting the region, or if the cursor is in the echo area,
1251 then we can't just move the cursor. */
1252 else if (! (!NILP (Vtransient_mark_mode
)
1253 && !NILP (current_buffer
->mark_active
))
1254 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1255 || highlight_nonselected_windows
)
1256 && NILP (w
->region_showing
)
1257 && !cursor_in_echo_area
)
1259 pos
= *compute_motion (tlbufpos
, 0,
1260 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1262 PT
, 2, - (1 << (BITS_PER_SHORT
- 1)),
1263 window_internal_width (w
) - 1,
1265 pos_tab_offset (w
, tlbufpos
, tlbufpos_byte
),
1269 int width
= window_internal_width (w
) - 1;
1270 FRAME_CURSOR_X (selected_frame
)
1271 = WINDOW_LEFT_MARGIN (w
) + minmax (0, pos
.hpos
, width
);
1272 FRAME_CURSOR_Y (selected_frame
) = this_line_vpos
;
1279 /* Text changed drastically or point moved off of line */
1280 cancel_line (this_line_vpos
, selected_frame
);
1283 this_line_bufpos
= 0;
1284 all_windows
|= buffer_shared
> 1;
1286 clear_face_cache_count
++;
1290 Lisp_Object tail
, frame
;
1293 /* Clear the face cache, only when we do a full redisplay
1294 and not too often either. */
1295 if (clear_face_cache_count
> 1000)
1297 clear_face_cache ();
1298 clear_face_cache_count
= 0;
1302 /* Recompute # windows showing selected buffer.
1303 This will be incremented each time such a window is displayed. */
1306 FOR_EACH_FRAME (tail
, frame
)
1308 FRAME_PTR f
= XFRAME (frame
);
1309 if (FRAME_WINDOW_P (f
) || f
== selected_frame
)
1312 /* Mark all the scroll bars to be removed; we'll redeem the ones
1313 we want when we redisplay their windows. */
1314 if (condemn_scroll_bars_hook
)
1315 (*condemn_scroll_bars_hook
) (f
);
1317 if (FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
1318 redisplay_windows (FRAME_ROOT_WINDOW (f
), preserve_echo_area
);
1320 /* Any scroll bars which redisplay_windows should have nuked
1321 should now go away. */
1322 if (judge_scroll_bars_hook
)
1323 (*judge_scroll_bars_hook
) (f
);
1327 else if (FRAME_VISIBLE_P (selected_frame
) && !FRAME_OBSCURED_P (selected_frame
))
1329 redisplay_window (selected_window
, 1, preserve_echo_area
);
1330 if (!WINDOW_FULL_WIDTH_P (w
))
1331 preserve_other_columns (w
);
1335 /* Prevent various kinds of signals during display update.
1336 stdio is not robust about handling signals,
1337 which can cause an apparent I/O error. */
1338 if (interrupt_input
)
1348 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1352 if (!FRAMEP (XCONS (tail
)->car
))
1355 f
= XFRAME (XCONS (tail
)->car
);
1357 if ((FRAME_WINDOW_P (f
) || f
== selected_frame
)
1358 && FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
1360 pause
|= update_frame (f
, 0, 0);
1363 mark_window_display_accurate (f
->root_window
, 1);
1364 if (frame_up_to_date_hook
!= 0)
1365 (*frame_up_to_date_hook
) (f
);
1372 if (FRAME_VISIBLE_P (selected_frame
) && !FRAME_OBSCURED_P (selected_frame
))
1373 pause
= update_frame (selected_frame
, 0, 0);
1377 /* We may have called echo_area_display at the top of this
1378 function. If the echo area is on another frame, that may
1379 have put text on a frame other than the selected one, so the
1380 above call to update_frame would not have caught it. Catch
1383 Lisp_Object mini_window
;
1384 FRAME_PTR mini_frame
;
1386 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
1387 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
1389 if (mini_frame
!= selected_frame
&& FRAME_WINDOW_P (mini_frame
))
1390 pause
|= update_frame (mini_frame
, 0, 0);
1394 /* If frame does not match, prevent doing single-line-update next time.
1395 Also, don't forget to check every line to update the arrow. */
1398 this_line_bufpos
= 0;
1399 if (!NILP (last_arrow_position
))
1401 last_arrow_position
= Qt
;
1402 last_arrow_string
= Qt
;
1404 /* If we pause after scrolling, some lines in current_frame
1405 may be null, so preserve_other_columns won't be able to
1406 preserve all the vertical-bar separators. So, avoid using it
1408 if (!WINDOW_FULL_WIDTH_P (w
))
1409 update_mode_lines
= 1;
1412 /* Now text on frame agrees with windows, so
1413 put info into the windows for partial redisplay to follow */
1417 register struct buffer
*b
= XBUFFER (w
->buffer
);
1419 blank_end_of_window
= 0;
1420 unchanged_modified
= BUF_MODIFF (b
);
1421 overlay_unchanged_modified
= BUF_OVERLAY_MODIFF (b
);
1422 beg_unchanged
= BUF_GPT (b
) - BUF_BEG (b
);
1423 end_unchanged
= BUF_Z (b
) - BUF_GPT (b
);
1425 XSETFASTINT (w
->last_point
, BUF_PT (b
));
1426 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (selected_frame
));
1427 XSETFASTINT (w
->last_point_y
, FRAME_CURSOR_Y (selected_frame
));
1430 mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame
), 1);
1433 b
->clip_changed
= 0;
1434 w
->update_mode_line
= Qnil
;
1435 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
1436 XSETFASTINT (w
->last_overlay_modified
, BUF_OVERLAY_MODIFF (b
));
1438 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1441 /* Record if we are showing a region, so can make sure to
1442 update it fully at next redisplay. */
1443 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1444 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1445 || highlight_nonselected_windows
)
1446 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1447 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1450 w
->window_end_valid
= w
->buffer
;
1451 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1452 last_arrow_string
= Voverlay_arrow_string
;
1453 if (do_verify_charstarts
)
1454 verify_charstarts (w
);
1455 if (frame_up_to_date_hook
!= 0)
1456 (*frame_up_to_date_hook
) (selected_frame
);
1458 update_mode_lines
= 0;
1459 windows_or_buffers_changed
= 0;
1462 /* Start SIGIO interrupts coming again.
1463 Having them off during the code above
1464 makes it less likely one will discard output,
1465 but not impossible, since there might be stuff
1466 in the system buffer here.
1467 But it is much hairier to try to do anything about that. */
1469 if (interrupt_input
)
1473 /* If something has become visible now which was not before,
1474 redisplay again, so that we get them. */
1477 Lisp_Object tail
, frame
;
1480 FOR_EACH_FRAME (tail
, frame
)
1482 int this_is_visible
= 0;
1484 if (XFRAME (frame
)->visible
)
1485 this_is_visible
= 1;
1486 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1487 if (XFRAME (frame
)->visible
)
1488 this_is_visible
= 1;
1490 if (this_is_visible
)
1494 if (new_count
!= number_of_visible_frames
)
1495 windows_or_buffers_changed
++;
1498 /* Change frame size now if a change is pending. */
1499 do_pending_window_change ();
1501 /* If we just did a pending size change, or have additional
1502 visible frames, redisplay again. */
1503 if (windows_or_buffers_changed
&& !pause
)
1507 /* Redisplay, but leave alone any recent echo area message
1508 unless another message has been requested in its place.
1510 This is useful in situations where you need to redisplay but no
1511 user action has occurred, making it inappropriate for the message
1512 area to be cleared. See tracking_off and
1513 wait_reading_process_input for examples of these situations. */
1516 redisplay_preserve_echo_area ()
1518 if (echo_area_glyphs
== 0 && previous_echo_glyphs
!= 0)
1520 echo_area_glyphs
= previous_echo_glyphs
;
1521 redisplay_internal (1);
1522 echo_area_glyphs
= 0;
1525 redisplay_internal (1);
1529 mark_window_display_accurate (window
, flag
)
1533 register struct window
*w
;
1535 for (;!NILP (window
); window
= w
->next
)
1537 if (!WINDOWP (window
)) abort ();
1538 w
= XWINDOW (window
);
1540 if (!NILP (w
->buffer
))
1542 XSETFASTINT (w
->last_modified
,
1543 !flag
? 0 : BUF_MODIFF (XBUFFER (w
->buffer
)));
1544 XSETFASTINT (w
->last_overlay_modified
,
1545 !flag
? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w
->buffer
)));
1547 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1550 /* Record if we are showing a region, so can make sure to
1551 update it fully at next redisplay. */
1552 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1553 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1554 || highlight_nonselected_windows
)
1555 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1556 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1560 w
->window_end_valid
= w
->buffer
;
1561 w
->update_mode_line
= Qnil
;
1562 if (!NILP (w
->buffer
) && flag
)
1563 XBUFFER (w
->buffer
)->clip_changed
= 0;
1565 if (!NILP (w
->vchild
))
1566 mark_window_display_accurate (w
->vchild
, flag
);
1567 if (!NILP (w
->hchild
))
1568 mark_window_display_accurate (w
->hchild
, flag
);
1573 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1574 last_arrow_string
= Voverlay_arrow_string
;
1578 /* t is unequal to any useful value of Voverlay_arrow_... */
1579 last_arrow_position
= Qt
;
1580 last_arrow_string
= Qt
;
1584 /* Update the menu bar item list for frame F.
1585 This has to be done before we start to fill in any display lines,
1586 because it can call eval.
1588 If SAVE_MATCH_DATA is 1, we must save and restore it here. */
1591 update_menu_bar (f
, save_match_data
)
1593 int save_match_data
;
1595 struct buffer
*old
= current_buffer
;
1597 register struct window
*w
;
1599 window
= FRAME_SELECTED_WINDOW (f
);
1600 w
= XWINDOW (window
);
1602 if (update_mode_lines
)
1603 w
->update_mode_line
= Qt
;
1605 if (FRAME_WINDOW_P (f
)
1607 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1608 FRAME_EXTERNAL_MENU_BAR (f
)
1610 FRAME_MENU_BAR_LINES (f
) > 0
1612 : FRAME_MENU_BAR_LINES (f
) > 0)
1614 /* If the user has switched buffers or windows, we need to
1615 recompute to reflect the new bindings. But we'll
1616 recompute when update_mode_lines is set too; that means
1617 that people can use force-mode-line-update to request
1618 that the menu bar be recomputed. The adverse effect on
1619 the rest of the redisplay algorithm is about the same as
1620 windows_or_buffers_changed anyway. */
1621 if (windows_or_buffers_changed
1622 || !NILP (w
->update_mode_line
)
1623 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1624 < BUF_MODIFF (XBUFFER (w
->buffer
)))
1625 != !NILP (w
->last_had_star
))
1626 || ((!NILP (Vtransient_mark_mode
)
1627 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1628 != !NILP (w
->region_showing
)))
1630 struct buffer
*prev
= current_buffer
;
1631 int count
= specpdl_ptr
- specpdl
;
1633 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1634 if (save_match_data
)
1635 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
1636 if (NILP (Voverriding_local_map_menu_flag
))
1638 specbind (Qoverriding_terminal_local_map
, Qnil
);
1639 specbind (Qoverriding_local_map
, Qnil
);
1642 /* Run the Lucid hook. */
1643 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
1644 /* If it has changed current-menubar from previous value,
1645 really recompute the menubar from the value. */
1646 if (! NILP (Vlucid_menu_bar_dirty_flag
))
1647 call0 (Qrecompute_lucid_menubar
);
1648 safe_run_hooks (Qmenu_bar_update_hook
);
1649 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
1650 /* Redisplay the menu bar in case we changed it. */
1651 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1652 if (FRAME_WINDOW_P (f
))
1653 set_frame_menubar (f
, 0, 0);
1655 /* On a terminal screen, the menu bar is an ordinary screen
1656 line, and this makes it get updated. */
1657 w
->update_mode_line
= Qt
;
1658 #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1659 /* In the non-toolkit version, the menu bar is an ordinary screen
1660 line, and this makes it get updated. */
1661 w
->update_mode_line
= Qt
;
1662 #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1664 unbind_to (count
, Qnil
);
1665 set_buffer_internal_1 (prev
);
1672 /* Redisplay WINDOW and its subwindows and siblings. */
1675 redisplay_windows (window
, preserve_echo_area
)
1677 int preserve_echo_area
;
1679 for (; !NILP (window
); window
= XWINDOW (window
)->next
)
1680 redisplay_window (window
, 0, preserve_echo_area
);
1683 /* Return value in display table DP (Lisp_Char_Table *) for character
1684 C. Since a display table doesn't have any parent, we don't have to
1685 follow parent. Do not call this function directly but use the
1686 macro DISP_CHAR_VECTOR. */
1688 disp_char_vector (dp
, c
)
1689 struct Lisp_Char_Table
*dp
;
1695 if (SINGLE_BYTE_CHAR_P (c
)) return (dp
->contents
[c
]);
1697 SPLIT_NON_ASCII_CHAR (c
, code
[0], code
[1], code
[2]);
1698 if (code
[0] != CHARSET_COMPOSITION
)
1700 if (code
[1] < 32) code
[1] = -1;
1701 else if (code
[2] < 32) code
[2] = -1;
1703 /* Here, the possible range of CODE[0] (== charset ID) is
1704 128..MAX_CHARSET. Since the top level char table contains data
1705 for multibyte characters after 256th element, we must increment
1706 CODE[0] by 128 to get a correct index. */
1708 code
[3] = -1; /* anchor */
1710 for (i
= 0; code
[i
] >= 0; i
++, dp
= XCHAR_TABLE (val
))
1712 val
= dp
->contents
[code
[i
]];
1713 if (!SUB_CHAR_TABLE_P (val
))
1714 return (NILP (val
) ? dp
->defalt
: val
);
1716 /* Here, VAL is a sub char table. We return the default value of it. */
1717 return (dp
->defalt
);
1720 /* Redisplay window WINDOW and its subwindows. */
1723 redisplay_window (window
, just_this_one
, preserve_echo_area
)
1725 int just_this_one
, preserve_echo_area
;
1727 register struct window
*w
= XWINDOW (window
);
1728 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
1731 int lpoint_byte
= PT_BYTE
;
1732 struct buffer
*old
= current_buffer
;
1733 register int width
= window_internal_width (w
) - 1;
1734 register int startp
, startp_byte
;
1735 register int hscroll
= XINT (w
->hscroll
);
1736 struct position pos
;
1738 int opoint_byte
= PT_BYTE
;
1740 int update_mode_line
;
1741 struct Lisp_Char_Table
*dp
= window_display_table (w
);
1743 if (Z
== Z_BYTE
&& lpoint
!= lpoint_byte
)
1745 if (lpoint_byte
< lpoint
)
1748 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1750 /* If this is a combination window, do its children; that's all. */
1752 if (!NILP (w
->vchild
))
1754 redisplay_windows (w
->vchild
, preserve_echo_area
);
1757 if (!NILP (w
->hchild
))
1759 redisplay_windows (w
->hchild
, preserve_echo_area
);
1762 if (NILP (w
->buffer
))
1765 height
= window_internal_height (w
);
1766 update_mode_line
= (!NILP (w
->update_mode_line
) || update_mode_lines
);
1767 if (XBUFFER (w
->buffer
)->clip_changed
)
1768 update_mode_line
= 1;
1770 if (MINI_WINDOW_P (w
))
1772 if (w
== XWINDOW (echo_area_window
) && echo_area_glyphs
)
1773 /* We've already displayed the echo area glyphs in this window. */
1774 goto finish_scroll_bars
;
1775 else if (w
!= XWINDOW (minibuf_window
))
1777 /* This is a minibuffer, but it's not the currently active one,
1779 int vpos
= XFASTINT (w
->top
);
1782 for (i
= 0; i
< height
; i
++)
1784 get_display_line (f
, vpos
+ i
, 0);
1785 display_string (w
, vpos
+ i
, "", 0,
1786 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
1790 goto finish_scroll_bars
;
1794 /* Otherwise set up data on this window; select its buffer and point value */
1796 if (update_mode_line
)
1797 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1799 set_buffer_temp (XBUFFER (w
->buffer
));
1802 opoint_byte
= PT_BYTE
;
1804 if (Z
== Z_BYTE
&& opoint
!= opoint_byte
)
1806 if (opoint_byte
< opoint
)
1809 /* If %c is in mode line, update it if needed. */
1810 if (!NILP (w
->column_number_displayed
)
1811 /* This alternative quickly identifies a common case
1812 where no change is needed. */
1813 && !(PT
== XFASTINT (w
->last_point
)
1814 && XFASTINT (w
->last_modified
) >= MODIFF
1815 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1816 && XFASTINT (w
->column_number_displayed
) != current_column ())
1817 update_mode_line
= 1;
1819 /* Count number of windows showing the selected buffer.
1820 An indirect buffer counts as its base buffer. */
1824 struct buffer
*current_base
, *window_base
;
1825 current_base
= current_buffer
;
1826 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
1827 if (current_base
->base_buffer
)
1828 current_base
= current_base
->base_buffer
;
1829 if (window_base
->base_buffer
)
1830 window_base
= window_base
->base_buffer
;
1831 if (current_base
== window_base
)
1835 /* POINT refers normally to the selected window.
1836 For any other window, set up appropriate value. */
1838 if (!EQ (window
, selected_window
))
1840 int new_pt
= XMARKER (w
->pointm
)->charpos
;
1841 int new_pt_byte
= marker_byte_position (w
->pointm
);
1845 new_pt_byte
= BEGV_BYTE
;
1846 set_marker_both (w
->pointm
, Qnil
, BEGV
, BEGV_BYTE
);
1848 else if (new_pt
> (ZV
- 1))
1851 new_pt_byte
= ZV_BYTE
;
1852 set_marker_both (w
->pointm
, Qnil
, ZV
, ZV_BYTE
);
1854 /* We don't use SET_PT so that the point-motion hooks don't run. */
1855 TEMP_SET_PT_BOTH (new_pt
, new_pt_byte
);
1858 /* If any of the character widths specified in the display table
1859 have changed, invalidate the width run cache. It's true that this
1860 may be a bit late to catch such changes, but the rest of
1861 redisplay goes (non-fatally) haywire when the display table is
1862 changed, so why should we worry about doing any better? */
1863 if (current_buffer
->width_run_cache
)
1865 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
1867 if (! disptab_matches_widthtab (disptab
,
1868 XVECTOR (current_buffer
->width_table
)))
1870 invalidate_region_cache (current_buffer
,
1871 current_buffer
->width_run_cache
,
1873 recompute_width_table (current_buffer
, disptab
);
1877 /* If window-start is screwed up, choose a new one. */
1878 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
1881 startp
= marker_position (w
->start
);
1882 startp_byte
= marker_byte_position (w
->start
);
1884 /* If someone specified a new starting point but did not insist,
1885 check whether it can be used. */
1886 if (!NILP (w
->optional_new_start
))
1888 w
->optional_new_start
= Qnil
;
1889 /* Check whether this start pos is usable given where point is. */
1891 pos
= *compute_motion (startp
, 0,
1892 (((EQ (window
, minibuf_window
)
1894 ? minibuf_prompt_width
: 0)
1895 + (hscroll
? 1 - hscroll
: 0)),
1898 /* BUG FIX: See the comment of
1899 Fpos_visible_in_window_p (window.c). */
1900 - (1 << (BITS_PER_SHORT
- 1)),
1902 pos_tab_offset (w
, startp
, startp_byte
), w
);
1903 /* If PT does fit on the screen, we will use this start pos,
1904 so do so by setting force_start. */
1905 if (pos
.bufpos
== PT
)
1906 w
->force_start
= Qt
;
1909 /* Handle case where place to start displaying has been specified,
1910 unless the specified location is outside the accessible range. */
1911 if (!NILP (w
->force_start
))
1913 w
->force_start
= Qnil
;
1914 /* Forget any recorded base line for line number display. */
1915 w
->base_line_number
= Qnil
;
1916 /* Redisplay the mode line. Select the buffer properly for that.
1917 Also, run the hook window-scroll-functions
1918 because we have scrolled. */
1919 /* Note, we do this after clearing force_start because
1920 if there's an error, it is better to forget about force_start
1921 than to get into an infinite loop calling the hook functions
1922 and having them get more errors. */
1923 if (!update_mode_line
1924 || ! NILP (Vwindow_scroll_functions
))
1926 Lisp_Object temp
[3];
1928 set_buffer_temp (old
);
1929 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1930 update_mode_line
= 1;
1931 w
->update_mode_line
= Qt
;
1932 if (! NILP (Vwindow_scroll_functions
))
1934 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1935 make_number (startp
));
1936 startp
= marker_position (w
->start
);
1939 XSETFASTINT (w
->last_modified
, 0);
1940 XSETFASTINT (w
->last_overlay_modified
, 0);
1941 if (startp
< BEGV
) startp
= BEGV
, startp_byte
= BEGV_BYTE
;
1942 if (startp
> ZV
) startp
= ZV
, startp
= ZV_BYTE
;
1943 try_window (window
, startp
);
1944 if (cursor_vpos
< 0)
1946 /* If point does not appear, move point so it does appear */
1947 pos
= *compute_motion (startp
, 0,
1948 (((EQ (window
, minibuf_window
)
1950 ? minibuf_prompt_width
: 0)
1951 + (hscroll
? 1 - hscroll
: 0)),
1954 - (1 << (BITS_PER_SHORT
- 1)),
1956 pos_tab_offset (w
, startp
, startp_byte
),
1958 TEMP_SET_PT_BOTH (pos
.bufpos
, pos
.bytepos
);
1959 if (w
!= XWINDOW (selected_window
))
1960 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
1963 if (current_buffer
== old
)
1966 lpoint_byte
= PT_BYTE
;
1968 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
1969 + minmax (0, pos
.hpos
, width
));
1970 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
1972 /* If we are highlighting the region,
1973 then we just changed the region, so redisplay to show it. */
1974 if (!NILP (Vtransient_mark_mode
)
1975 && !NILP (current_buffer
->mark_active
))
1977 cancel_my_columns (XWINDOW (window
));
1978 try_window (window
, startp
);
1984 /* Handle case where text has not changed, only point,
1985 and it has not moved off the frame. */
1987 /* This code is not used for minibuffer for the sake of
1988 the case of redisplaying to replace an echo area message;
1989 since in that case the minibuffer contents per se are usually unchanged.
1990 This code is of no real use in the minibuffer since
1991 the handling of this_line_bufpos, etc.,
1992 in redisplay handles the same cases. */
1994 if (XFASTINT (w
->last_modified
) >= MODIFF
1995 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
1996 && PT
>= startp
&& !current_buffer
->clip_changed
1997 && (just_this_one
|| WINDOW_FULL_WIDTH_P (w
))
1998 /* If force-mode-line-update was called, really redisplay;
1999 that's how redisplay is forced after e.g. changing
2000 buffer-invisibility-spec. */
2001 && NILP (w
->update_mode_line
)
2002 /* Can't use this case if highlighting a region. */
2003 && !(!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
2004 && NILP (w
->region_showing
)
2005 /* If end pos is out of date, scroll bar and percentage will be wrong */
2006 && INTEGERP (w
->window_end_vpos
)
2007 && XFASTINT (w
->window_end_vpos
) < XFASTINT (w
->height
)
2008 && !EQ (window
, minibuf_window
)
2009 && (!MARKERP (Voverlay_arrow_position
)
2010 || current_buffer
!= XMARKER (Voverlay_arrow_position
)->buffer
))
2012 /* All positions in this clause are relative to the window edge. */
2014 int this_scroll_margin
= scroll_margin
;
2015 int last_point_y
= XFASTINT (w
->last_point_y
) - XINT (w
->top
);
2016 int last_point_x
= (XFASTINT (w
->last_point_x
) - WINDOW_LEFT_MARGIN (w
));
2018 /* Find where PT is located now on the frame. */
2019 /* Check just_this_one as a way of verifying that the
2020 window edges have not changed. */
2021 if (PT
== XFASTINT (w
->last_point
) && just_this_one
)
2023 pos
.hpos
= last_point_x
;
2024 pos
.vpos
= last_point_y
;
2027 else if (PT
> XFASTINT (w
->last_point
)
2028 && XFASTINT (w
->last_point
) > startp
&& just_this_one
2029 /* We can't use this if point is in the left margin of a
2030 hscrolled window, because w->last_point_x has been
2031 clipped to the window edges. */
2032 && !(last_point_x
<= 0 && hscroll
))
2034 pos
= *compute_motion (XFASTINT (w
->last_point
),
2035 last_point_y
, last_point_x
, 0,
2037 /* BUG FIX: See the comment of
2038 Fpos_visible_in_window_p (window.c). */
2039 - (1 << (BITS_PER_SHORT
- 1)),
2041 pos_tab_offset (w
, startp
, startp_byte
),
2046 pos
= *compute_motion (startp
, 0, (hscroll
? 1 - hscroll
: 0), 0,
2048 /* BUG FIX: See the comment of
2049 Fpos_visible_in_window_p (window.c). */
2050 - (1 << (BITS_PER_SHORT
- 1)),
2052 pos_tab_offset (w
, startp
, startp_byte
),
2056 /* Don't use a scroll margin that is negative or too large. */
2057 if (this_scroll_margin
< 0)
2058 this_scroll_margin
= 0;
2060 if (XINT (w
->height
) < 4 * scroll_margin
)
2061 this_scroll_margin
= XINT (w
->height
) / 4;
2063 /* If point fits on the screen, and not within the scroll margin,
2065 if (pos
.vpos
< height
- this_scroll_margin
2066 && (pos
.vpos
>= this_scroll_margin
|| startp
== BEGV
))
2068 /* Ok, point is still on frame */
2069 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
2071 /* These variables are supposed to be origin 1 */
2072 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
2073 + minmax (0, pos
.hpos
, width
));
2074 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
2076 /* This doesn't do the trick, because if a window to the right of
2077 this one must be redisplayed, this does nothing because there
2078 is nothing in DesiredFrame yet, and then the other window is
2079 redisplayed, making likes that are empty in this window's columns.
2080 if (WINDOW_FULL_WIDTH_P (w))
2081 preserve_my_columns (w);
2083 if (current_buffer
->clip_changed
2084 && ! NILP (Vwindow_scroll_functions
))
2085 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2086 make_number (marker_position (w
->start
)));
2090 /* Don't bother trying redisplay with same start;
2091 we already know it will lose */
2093 /* If current starting point was originally the beginning of a line
2094 but no longer is, find a new starting point. */
2095 else if (!NILP (w
->start_at_line_beg
)
2097 || FETCH_BYTE (startp_byte
- 1) == '\n'))
2101 else if (just_this_one
&& !MINI_WINDOW_P (w
)
2103 && XFASTINT (w
->last_modified
)
2104 /* or else vmotion on first line won't work. */
2105 && ! NILP (w
->start_at_line_beg
)
2106 && ! EQ (w
->window_end_valid
, Qnil
)
2107 && do_id
&& !current_buffer
->clip_changed
2108 && !blank_end_of_window
2109 && WINDOW_FULL_WIDTH_P (w
)
2110 /* Can't use this case if highlighting a region. */
2111 && !(!NILP (Vtransient_mark_mode
)
2112 && !NILP (current_buffer
->mark_active
))
2113 /* Don't use try_window_id if newline
2114 doesn't display as the end of a line. */
2115 && !(dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, '\n')))
2116 && NILP (w
->region_showing
)
2117 && EQ (last_arrow_position
, COERCE_MARKER (Voverlay_arrow_position
))
2118 && EQ (last_arrow_string
, Voverlay_arrow_string
)
2119 && (tem
= try_window_id (FRAME_SELECTED_WINDOW (f
)))
2122 /* tem > 0 means success. tem == -1 means choose new start.
2123 tem == -2 means try again with same start,
2124 and nothing but whitespace follows the changed stuff.
2125 tem == 0 means try again with same start. */
2129 else if (startp
>= BEGV
&& startp
<= ZV
2131 /* Avoid starting at end of buffer. */
2132 #if 0 /* This change causes trouble for M-! finger & RET.
2133 It will have to be considered later. */
2134 || ! EQ (window
, selected_window
)
2135 /* Don't do the recentering if redisplay
2136 is not for no user action. */
2137 || preserve_echo_area
2140 || (XFASTINT (w
->last_modified
) >= MODIFF
2141 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
2143 /* Try to redisplay starting at same place as before */
2144 /* If point has not moved off frame, accept the results */
2145 try_window (window
, startp
);
2146 if (cursor_vpos
>= 0)
2148 if (!just_this_one
|| current_buffer
->clip_changed
2149 || beg_unchanged
< startp
)
2150 /* Forget any recorded base line for line number display. */
2151 w
->base_line_number
= Qnil
;
2153 if (current_buffer
->clip_changed
2154 && ! NILP (Vwindow_scroll_functions
))
2155 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2156 make_number (marker_position (w
->start
)));
2161 cancel_my_columns (w
);
2164 XSETFASTINT (w
->last_modified
, 0);
2165 XSETFASTINT (w
->last_overlay_modified
, 0);
2166 /* Redisplay the mode line. Select the buffer properly for that. */
2167 if (!update_mode_line
)
2169 set_buffer_temp (old
);
2170 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2171 update_mode_line
= 1;
2172 w
->update_mode_line
= Qt
;
2175 /* Try to scroll by specified few lines */
2177 if (scroll_conservatively
&& !current_buffer
->clip_changed
2178 && startp
>= BEGV
&& startp
<= ZV
)
2180 int this_scroll_margin
= scroll_margin
;
2181 int scroll_margin_pos
;
2183 /* Don't use a scroll margin that is negative or too large. */
2184 if (this_scroll_margin
< 0)
2185 this_scroll_margin
= 0;
2187 if (XINT (w
->height
) < 4 * this_scroll_margin
)
2188 this_scroll_margin
= XINT (w
->height
) / 4;
2190 scroll_margin_pos
= Z
- XFASTINT (w
->window_end_pos
);
2191 if (this_scroll_margin
)
2193 pos
= *vmotion (scroll_margin_pos
, -this_scroll_margin
, w
);
2194 scroll_margin_pos
= pos
.bufpos
;
2196 if (PT
>= scroll_margin_pos
)
2198 struct position pos
;
2199 pos
= *compute_motion (scroll_margin_pos
, 0, 0, 0,
2200 PT
, XFASTINT (w
->height
), 0,
2201 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2202 pos_tab_offset (w
, startp
, startp_byte
),
2204 if (pos
.vpos
> scroll_conservatively
)
2207 pos
= *vmotion (startp
, pos
.vpos
+ 1, w
);
2209 if (! NILP (Vwindow_scroll_functions
))
2211 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2212 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2213 make_number (pos
.bufpos
));
2214 pos
.bufpos
= marker_position (w
->start
);
2216 try_window (window
, pos
.bufpos
);
2217 if (cursor_vpos
>= 0)
2219 if (!just_this_one
|| current_buffer
->clip_changed
2220 || beg_unchanged
< startp
)
2221 /* Forget any recorded base line for line number display. */
2222 w
->base_line_number
= Qnil
;
2226 cancel_my_columns (w
);
2229 scroll_margin_pos
= startp
;
2230 if (this_scroll_margin
)
2232 pos
= *vmotion (scroll_margin_pos
, this_scroll_margin
, w
);
2233 scroll_margin_pos
= pos
.bufpos
;
2235 if (PT
< scroll_margin_pos
)
2237 struct position pos
;
2238 pos
= *compute_motion (PT
, 0, 0, 0,
2239 scroll_margin_pos
, XFASTINT (w
->height
), 0,
2240 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2241 pos_tab_offset (w
, startp
, startp_byte
),
2243 if (pos
.vpos
> scroll_conservatively
)
2246 pos
= *vmotion (startp
, -pos
.vpos
, w
);
2248 if (! NILP (Vwindow_scroll_functions
))
2250 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2251 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2252 make_number (pos
.bufpos
));
2253 pos
.bufpos
= marker_position (w
->start
);
2255 try_window (window
, pos
.bufpos
);
2256 if (cursor_vpos
>= 0)
2258 if (!just_this_one
|| current_buffer
->clip_changed
2259 || beg_unchanged
< startp
)
2260 /* Forget any recorded base line for line number display. */
2261 w
->base_line_number
= Qnil
;
2265 cancel_my_columns (w
);
2270 if (scroll_step
&& !current_buffer
->clip_changed
2271 && startp
>= BEGV
&& startp
<= ZV
)
2275 pos
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), scroll_step
, w
);
2276 if (pos
.vpos
>= height
)
2280 pos
= *vmotion (startp
, (PT
< startp
? - scroll_step
: scroll_step
), w
);
2282 if (PT
>= pos
.bufpos
)
2284 if (! NILP (Vwindow_scroll_functions
))
2286 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2287 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2288 make_number (pos
.bufpos
));
2289 pos
.bufpos
= marker_position (w
->start
);
2291 try_window (window
, pos
.bufpos
);
2292 if (cursor_vpos
>= 0)
2294 if (!just_this_one
|| current_buffer
->clip_changed
2295 || beg_unchanged
< startp
)
2296 /* Forget any recorded base line for line number display. */
2297 w
->base_line_number
= Qnil
;
2301 cancel_my_columns (w
);
2306 /* Finally, just choose place to start which centers point */
2309 /* Forget any previously recorded base line for line number display. */
2310 w
->base_line_number
= Qnil
;
2312 pos
= *vmotion (PT
, - (height
/ 2), w
);
2314 /* The minibuffer is often just one line. Ordinary scrolling
2315 gives little overlap and looks bad. So show 20 chars before point. */
2317 && (pos
.bufpos
>= PT
- minibuffer_scroll_overlap
2318 /* If we scrolled less than 1/2 line forward, we will
2319 get too much overlap, so change to the usual amount. */
2320 || pos
.bufpos
< startp
+ width
/ 2)
2321 && PT
> BEGV
+ minibuffer_scroll_overlap
2322 /* If we scrolled to an actual line boundary,
2323 that's different; don't ignore line boundaries. */
2324 && FETCH_BYTE (pos
.bufpos
- 1) != '\n')
2326 pos
.bufpos
= PT
- minibuffer_scroll_overlap
;
2327 pos
.bytepos
= CHAR_TO_BYTE (pos
.bufpos
);
2330 /* Set startp here explicitly in case that helps avoid an infinite loop
2331 in case the window-scroll-functions functions get errors. */
2332 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2333 if (! NILP (Vwindow_scroll_functions
))
2335 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2336 make_number (pos
.bufpos
));
2337 pos
.bufpos
= marker_position (w
->start
);
2338 pos
.bytepos
= marker_byte_position (w
->start
);
2340 try_window (window
, pos
.bufpos
);
2342 startp
= marker_position (w
->start
);
2343 startp_byte
= marker_byte_position (w
->start
);
2344 w
->start_at_line_beg
2345 = (startp
== BEGV
|| FETCH_BYTE (startp_byte
- 1) == '\n') ? Qt
: Qnil
;
2348 if ((update_mode_line
2349 /* If window not full width, must redo its mode line
2350 if the window to its side is being redone */
2351 || (!just_this_one
&& !WINDOW_FULL_WIDTH_P (w
))
2352 || INTEGERP (w
->base_line_pos
)
2353 || (!NILP (w
->column_number_displayed
)
2354 && XFASTINT (w
->column_number_displayed
) != current_column ()))
2355 && height
!= XFASTINT (w
->height
))
2356 display_mode_line (w
);
2357 if (! line_number_displayed
2358 && ! BUFFERP (w
->base_line_pos
))
2360 w
->base_line_pos
= Qnil
;
2361 w
->base_line_number
= Qnil
;
2364 /* When we reach a frame's selected window, redo the frame's menu bar. */
2365 if (update_mode_line
2366 && (FRAME_WINDOW_P (f
)
2368 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
2369 FRAME_EXTERNAL_MENU_BAR (f
)
2371 FRAME_MENU_BAR_LINES (f
) > 0
2373 : FRAME_MENU_BAR_LINES (f
) > 0)
2374 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
2375 display_menu_bar (w
);
2378 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2380 int start
, end
, whole
;
2382 /* Calculate the start and end positions for the current window.
2383 At some point, it would be nice to choose between scrollbars
2384 which reflect the whole buffer size, with special markers
2385 indicating narrowing, and scrollbars which reflect only the
2388 Note that minibuffers sometimes aren't displaying any text. */
2389 if (! MINI_WINDOW_P (w
)
2390 || (w
== XWINDOW (minibuf_window
) && ! echo_area_glyphs
))
2393 start
= marker_position (w
->start
) - BEGV
;
2394 /* I don't think this is guaranteed to be right. For the
2395 moment, we'll pretend it is. */
2396 end
= (Z
- XINT (w
->window_end_pos
)) - BEGV
;
2398 if (end
< start
) end
= start
;
2399 if (whole
< (end
- start
)) whole
= end
- start
;
2402 start
= end
= whole
= 0;
2404 /* Indicate what this scroll bar ought to be displaying now. */
2405 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
2407 /* Note that we actually used the scroll bar attached to this window,
2408 so it shouldn't be deleted at the end of redisplay. */
2409 (*redeem_scroll_bar_hook
) (w
);
2412 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
2413 if (update_mode_line
)
2414 set_buffer_internal_1 (old
);
2416 set_buffer_temp (old
);
2417 TEMP_SET_PT_BOTH (lpoint
, lpoint_byte
);
2420 /* Do full redisplay on one window, starting at position `pos'. */
2423 try_window (window
, pos
)
2427 register struct window
*w
= XWINDOW (window
);
2428 register int height
= window_internal_height (w
);
2429 register int vpos
= XFASTINT (w
->top
);
2430 register int last_text_vpos
= vpos
;
2431 FRAME_PTR f
= XFRAME (w
->frame
);
2432 int width
= window_internal_width (w
) - 1;
2433 struct position val
;
2435 /* POS should never be out of range! */
2436 if (pos
< XBUFFER (w
->buffer
)->begv
2437 || pos
> XBUFFER (w
->buffer
)->zv
)
2440 if (XMARKER (w
->start
)->charpos
!= pos
)
2441 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2444 overlay_arrow_seen
= 0;
2445 zv_strings_seen
= 0;
2446 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
2447 val
.ovstring_chars_done
= 0;
2448 val
.bytepos
= marker_byte_position (w
->start
);
2449 val
.tab_offset
= pos_tab_offset (w
, pos
, val
.bytepos
);
2451 while (--height
>= 0)
2453 val
= *display_text_line (w
, pos
, val
.bytepos
, vpos
,
2454 val
.hpos
, val
.tab_offset
,
2455 val
.ovstring_chars_done
);
2456 /* The following code is omitted because we maintain tab_offset
2459 tab_offset
+= width
;
2460 if (val
.vpos
) tab_offset
= 0;
2463 if (pos
!= val
.bufpos
)
2466 #ifdef USE_TEXT_PROPERTIES
2467 Lisp_Object invis_prop
;
2468 invis_prop
= Fget_char_property (val
.bufpos
-1, Qinvisible
, window
);
2469 invis
= TEXT_PROP_MEANS_INVISIBLE (invis_prop
);
2473 /* Next line, unless prev line ended in end of buffer with no cr */
2475 && (FETCH_BYTE (val
.bytepos
- 1) != '\n' || invis
));
2480 /* If last line is continued in middle of character,
2481 include the split character in the text considered on the frame */
2482 if (val
.hpos
< (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
2485 /* If bottom just moved off end of frame, change mode line percentage. */
2486 if (XFASTINT (w
->window_end_pos
) == 0
2488 w
->update_mode_line
= Qt
;
2490 /* Say where last char on frame will be, once redisplay is finished. */
2491 XSETFASTINT (w
->window_end_pos
, Z
- pos
);
2492 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
- XFASTINT (w
->top
));
2493 /* But that is not valid info until redisplay finishes. */
2494 w
->window_end_valid
= Qnil
;
2497 /* Try to redisplay when buffer is modified locally,
2498 computing insert/delete line to preserve text outside
2499 the bounds of the changes.
2500 Return 1 if successful, 0 if if cannot tell what to do,
2501 or -1 to tell caller to find a new window start,
2502 or -2 to tell caller to do normal redisplay with same window start. */
2505 try_window_id (window
)
2509 int opoint
, opoint_byte
;
2510 register struct window
*w
= XWINDOW (window
);
2511 register int height
= window_internal_height (w
);
2512 FRAME_PTR f
= XFRAME (w
->frame
);
2513 int top
= XFASTINT (w
->top
);
2514 int start
= marker_position (w
->start
);
2515 int width
= window_internal_width (w
) - 1;
2516 int hscroll
= XINT (w
->hscroll
);
2517 int lmargin
= hscroll
> 0 ? 1 - hscroll
: 0;
2520 register int i
, tem
;
2521 int last_text_vpos
= 0;
2523 int selective
= (INTEGERP (current_buffer
->selective_display
)
2524 ? XINT (current_buffer
->selective_display
)
2525 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2526 struct position val
, bp
, ep
, xp
, pp
;
2527 int scroll_amount
= 0;
2531 int start_byte
= marker_byte_position (w
->start
);
2533 if (GPT
- BEG
< beg_unchanged
)
2534 beg_unchanged
= GPT
- BEG
;
2535 if (Z
- GPT
< end_unchanged
)
2536 end_unchanged
= Z
- GPT
;
2538 if (beg_unchanged
+ BEG
< start
)
2539 return 0; /* Give up if changes go above top of window */
2541 /* Find position before which nothing is changed. */
2542 bp
= *compute_motion (start
, 0, lmargin
, 0,
2543 min (ZV
, beg_unchanged
+ BEG
), height
,
2544 /* BUG FIX: See the comment of
2545 Fpos_visible_in_window_p (window.c). */
2546 - (1 << (BITS_PER_SHORT
- 1)),
2548 pos_tab_offset (w
, start
, start_byte
),
2550 if (bp
.vpos
>= height
)
2554 /* All changes are beyond the window end, and point is on the screen.
2555 We don't need to change the text at all.
2556 But we need to update window_end_pos to account for
2557 any change in buffer size. */
2558 bp
= *compute_motion (start
, 0, lmargin
, 0,
2560 /* BUG FIX: See the comment of
2561 Fpos_visible_in_window_p() (window.c). */
2562 - (1 << (BITS_PER_SHORT
- 1)),
2564 pos_tab_offset (w
, start
, start_byte
), w
);
2565 XSETFASTINT (w
->window_end_vpos
, height
);
2566 XSETFASTINT (w
->window_end_pos
, Z
- bp
.bufpos
);
2574 /* Find beginning of that frame line. Must display from there. */
2575 bp
= *vmotion (bp
.bufpos
, 0, w
);
2578 pos_byte
= bp
.bytepos
;
2584 /* If about to start displaying at the beginning of a continuation line,
2585 really start with previous frame line, in case it was not
2586 continued when last redisplayed */
2587 if ((bp
.contin
&& bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0)
2589 /* Likewise if we have to worry about selective display. */
2590 (selective
> 0 && bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0))
2592 bp
= *vmotion (bp
.bufpos
, -1, w
);
2595 pos_byte
= bp
.bytepos
;
2597 val
.tab_offset
= bp
.tab_offset
; /* Update tab offset. */
2599 if (bp
.contin
&& bp
.hpos
!= lmargin
)
2601 val
.hpos
= bp
.prevhpos
- width
+ lmargin
;
2602 val
.tab_offset
= bp
.tab_offset
+ bp
.prevhpos
- width
;
2604 DEC_BOTH (pos
, pos_byte
);
2609 /* Find first visible newline after which no more is changed. */
2610 opoint
= PT
, opoint_byte
= PT_BYTE
;
2611 SET_PT (Z
- max (end_unchanged
, Z
- ZV
));
2612 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2614 while (PT
< ZV
- 1 && indented_beyond_p (PT
, PT_BYTE
, selective
))
2615 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2617 SET_PT_BOTH (opoint
, opoint_byte
);
2619 /* Compute the cursor position after that newline. */
2620 ep
= *compute_motion (pos
, vpos
, val
.hpos
, did_motion
, tem
,
2621 height
, - (1 << (BITS_PER_SHORT
- 1)),
2623 /* We have tab offset in VAL, use it. */
2626 /* If changes reach past the text available on the frame,
2627 just display rest of frame. */
2628 if (ep
.bufpos
> Z
- XFASTINT (w
->window_end_pos
))
2631 stop_vpos
= ep
.vpos
;
2633 /* If no newline before ep, the line ep is on includes some changes
2634 that must be displayed. Make sure we don't stop before it. */
2635 /* Also, if changes reach all the way until ep.bufpos,
2636 it is possible that something was deleted after the
2637 newline before it, so the following line must be redrawn. */
2638 if (stop_vpos
== ep
.vpos
2639 && (ep
.bufpos
== BEGV
2640 || FETCH_BYTE (ep
.bufpos
- 1) != '\n'
2641 || ep
.bufpos
== Z
- end_unchanged
))
2642 stop_vpos
= ep
.vpos
+ 1;
2645 overlay_arrow_seen
= 0;
2646 zv_strings_seen
= 0;
2648 /* If changes do not reach to bottom of window,
2649 figure out how much to scroll the rest of the window */
2650 if (stop_vpos
< height
)
2652 /* Now determine how far up or down the rest of the window has moved */
2653 xp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2654 Z
- XFASTINT (w
->window_end_pos
),
2655 /* Don't care for VPOS... */
2656 1 << (BITS_PER_SHORT
- 1),
2658 1 << (BITS_PER_SHORT
- 1),
2659 width
, hscroll
, ep
.tab_offset
, w
);
2660 scroll_amount
= xp
.vpos
- XFASTINT (w
->window_end_vpos
);
2662 /* Is everything on frame below the changes whitespace?
2663 If so, no scrolling is really necessary. */
2664 for (i
= ep
.bufpos
; i
< xp
.bufpos
; i
++)
2666 tem
= FETCH_BYTE (i
);
2667 if (tem
!= ' ' && tem
!= '\n' && tem
!= '\t')
2673 XSETFASTINT (w
->window_end_vpos
,
2674 XFASTINT (w
->window_end_vpos
) + scroll_amount
);
2676 /* Before doing any scrolling, verify that point will be on frame. */
2677 if (PT
> ep
.bufpos
&& !(PT
<= xp
.bufpos
&& xp
.vpos
< height
))
2679 if (PT
<= xp
.bufpos
)
2681 pp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2682 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2684 /* We have tab offset in EP, use it. */
2689 pp
= *compute_motion (xp
.bufpos
, xp
.vpos
, xp
.hpos
, 1,
2690 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2692 /* We have tab offset in XP, use it. */
2695 if (pp
.bufpos
< PT
|| pp
.vpos
== height
)
2697 cursor_vpos
= pp
.vpos
+ top
;
2698 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, pp
.hpos
, width
);
2701 if (stop_vpos
- scroll_amount
>= height
2702 || ep
.bufpos
== xp
.bufpos
)
2704 if (scroll_amount
< 0)
2705 stop_vpos
-= scroll_amount
;
2707 /* In this path, we have altered window_end_vpos
2708 and not left it negative.
2709 We must make sure that, in case display is preempted
2710 before the frame changes to reflect what we do here,
2711 further updates will not come to try_window_id
2712 and assume the frame and window_end_vpos match. */
2713 blank_end_of_window
= 1;
2715 else if (!scroll_amount
)
2717 /* Even if we don't need to scroll, we must adjust the
2718 charstarts of subsequent lines (that we won't redisplay)
2719 according to the amount of text inserted or deleted. */
2720 int oldpos
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2721 int adjust
= ep
.bufpos
- oldpos
;
2722 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1, adjust
);
2724 else if (bp
.bufpos
== Z
- end_unchanged
)
2726 /* If reprinting everything is nearly as fast as scrolling,
2727 don't bother scrolling. Can happen if lines are short. */
2728 if (scroll_cost (f
, bp
.vpos
+ top
- scroll_amount
,
2729 top
+ height
- max (0, scroll_amount
),
2731 > xp
.bufpos
- bp
.bufpos
- 20)
2732 /* Return "try normal display with same window-start."
2733 Too bad we can't prevent further scroll-thinking. */
2735 /* If pure deletion, scroll up as many lines as possible.
2736 In common case of killing a line, this can save the
2737 following line from being overwritten by scrolling
2738 and therefore having to be redrawn. */
2739 tem
= scroll_frame_lines (f
, bp
.vpos
+ top
- scroll_amount
,
2740 top
+ height
- max (0, scroll_amount
),
2741 scroll_amount
, bp
.bufpos
);
2746 /* scroll_frame_lines did not properly adjust subsequent
2747 lines' charstarts in the case where the text of the
2748 screen line at bp.vpos has changed.
2749 (This can happen in a deletion that ends in mid-line.)
2750 To adjust properly, we need to make things consistent
2752 So do a second adjust to make that happen.
2753 Note that stop_vpos >= ep.vpos, so it is sufficient
2754 to update the charstarts for lines at ep.vpos and below. */
2756 = FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2757 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1,
2758 ep
.bufpos
- oldstart
);
2761 else if (scroll_amount
)
2763 /* If reprinting everything is nearly as fast as scrolling,
2764 don't bother scrolling. Can happen if lines are short. */
2765 /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an
2766 overestimate of cost of reprinting, since xp.bufpos
2767 would end up below the bottom of the window. */
2768 if (scroll_cost (f
, ep
.vpos
+ top
- scroll_amount
,
2769 top
+ height
- max (0, scroll_amount
),
2771 > xp
.bufpos
- ep
.bufpos
- 20)
2772 /* Return "try normal display with same window-start."
2773 Too bad we can't prevent further scroll-thinking. */
2775 tem
= scroll_frame_lines (f
, ep
.vpos
+ top
- scroll_amount
,
2776 top
+ height
- max (0, scroll_amount
),
2777 scroll_amount
, ep
.bufpos
);
2778 if (!tem
) stop_vpos
= height
;
2782 /* In any case, do not display past bottom of window */
2783 if (stop_vpos
>= height
)
2789 /* Handle case where pos is before w->start --
2790 can happen if part of line had been clipped and is not clipped now */
2791 if (vpos
== 0 && pos
< marker_position (w
->start
))
2792 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2794 val
.bytepos
= pos_byte
;
2796 /* Redisplay the lines where the text was changed */
2797 last_text_vpos
= vpos
;
2798 /* The following code is omitted because we maintain tab offset in
2801 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2802 /* If we are starting display in mid-character, correct tab_offset
2803 to account for passing the line that that character really starts in. */
2804 if (val
.hpos
< lmargin
)
2805 tab_offset
+= width
;
2808 while (vpos
< stop_vpos
)
2810 val
= *display_text_line (w
, pos
, val
.bytepos
, top
+ vpos
++,
2811 val
.hpos
, val
.tab_offset
,
2812 val
.ovstring_chars_done
);
2813 /* If display_text_line ran a hook and changed some text,
2814 redisplay all the way to bottom of buffer
2815 So that we show the changes. */
2816 if (old_tick
!= MODIFF
)
2818 /* The following code is omitted because we maintain tab offset
2819 in val.tab_offset. */
2821 tab_offset
+= width
;
2822 if (val
.vpos
) tab_offset
= 0;
2824 if (pos
!= val
.bufpos
)
2826 /* Next line, unless prev line ended in end of buffer with no cr */
2827 = vpos
- (val
.vpos
&& FETCH_BYTE (val
.bufpos
- 1) != '\n');
2831 /* There are two cases:
2832 1) we have displayed down to the bottom of the window
2833 2) we have scrolled lines below stop_vpos by scroll_amount */
2837 /* If last line is continued in middle of character,
2838 include the split character in the text considered on the frame */
2839 if (val
.hpos
< lmargin
)
2841 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
);
2842 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2845 /* If scrolling made blank lines at window bottom,
2846 redisplay to fill those lines */
2847 if (scroll_amount
< 0)
2849 /* Don't consider these lines for general-purpose scrolling.
2850 That will save time in the scrolling computation. */
2851 FRAME_SCROLL_BOTTOM_VPOS (f
) = xp
.vpos
;
2854 pos_byte
= xp
.bytepos
;
2856 val
.tab_offset
= xp
.tab_offset
;
2858 { /* Display from next line */
2859 vpos
= height
+ scroll_amount
;
2863 else if (xp
.contin
&& xp
.hpos
!= lmargin
)
2865 val
.hpos
= xp
.prevhpos
- width
+ lmargin
;
2866 val
.tab_offset
= xp
.tab_offset
+ bp
.prevhpos
- width
;
2867 DEC_BOTH (pos
, pos_byte
);
2870 blank_end_of_window
= 1;
2871 /* The following code is omitted because we maintain tab offset
2872 in val.tab_offset. */
2874 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2875 /* If we are starting display in mid-character, correct tab_offset
2876 to account for passing the line that that character starts in. */
2877 if (val
.hpos
< lmargin
)
2878 tab_offset
+= width
;
2881 while (vpos
< height
)
2883 val
= *display_text_line (w
, pos
, val
.bytepos
,
2884 top
+ vpos
++, val
.hpos
,
2885 val
.tab_offset
, val
.ovstring_chars_done
);
2886 /* The following code is omitted because we maintain tab
2887 offset in val.tab_offset. */
2889 tab_offset
+= width
;
2890 if (val
.vpos
) tab_offset
= 0;
2895 /* Here is a case where display_text_line sets cursor_vpos wrong.
2896 Make it be fixed up, below. */
2902 /* If bottom just moved off end of frame, change mode line percentage. */
2903 if (XFASTINT (w
->window_end_pos
) == 0
2905 w
->update_mode_line
= Qt
;
2907 /* Attempt to adjust end-of-text positions to new bottom line */
2910 delta
= height
- xp
.vpos
;
2912 || (delta
> 0 && xp
.bufpos
<= ZV
)
2913 || (delta
== 0 && xp
.hpos
))
2915 val
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), delta
, w
);
2916 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2917 XSETFASTINT (w
->window_end_vpos
,
2918 XFASTINT (w
->window_end_vpos
) + val
.vpos
);
2922 w
->window_end_valid
= Qnil
;
2924 /* If point was not in a line that was displayed, find it */
2925 if (cursor_vpos
< 0)
2928 val
= *compute_motion (start
, 0, lmargin
, 0, PT
,
2929 /* Don't care for VPOS... */
2930 1 << (BITS_PER_SHORT
- 1),
2932 1 << (BITS_PER_SHORT
- 1),
2934 pos_tab_offset (w
, start
, start_byte
),
2936 /* Admit failure if point is off frame now */
2937 if (val
.vpos
>= height
)
2939 for (vpos
= 0; vpos
< height
; vpos
++)
2940 cancel_line (vpos
+ top
, f
);
2943 cursor_vpos
= val
.vpos
+ top
;
2944 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, val
.hpos
, width
);
2947 FRAME_CURSOR_X (f
) = cursor_hpos
;
2948 FRAME_CURSOR_Y (f
) = cursor_vpos
;
2952 val
= *compute_motion (start
, 0, lmargin
, 0, ZV
,
2953 height
, - (1 << (BITS_PER_SHORT
- 1)),
2955 pos_tab_offset (w
, start
, start_byte
),
2957 if (val
.vpos
!= XFASTINT (w
->window_end_vpos
))
2959 if (XFASTINT (w
->window_end_pos
)
2967 /* Copy LEN glyphs starting address FROM to the rope TO.
2968 But don't actually copy the parts that would come in before S.
2969 Value is TO, advanced past the copied data.
2970 F is the frame we are displaying in. */
2973 copy_part_of_rope (f
, to
, s
, from
, len
, face
)
2975 register GLYPH
*to
; /* Copy to here. */
2976 register GLYPH
*s
; /* Starting point. */
2977 Lisp_Object
*from
; /* Data to copy. */
2979 int face
; /* Face to apply to glyphs which don't specify one. */
2982 register Lisp_Object
*fp
= from
;
2983 /* These cache the results of the last call to compute_glyph_face. */
2985 int last_merged
= 0;
2988 if (! FRAME_TERMCAP_P (f
))
2991 GLYPH glyph
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
2993 unsigned int c
= FAST_GLYPH_CHAR (glyph
);
2996 /* For an invalid character code, use space. */
2999 if (FAST_GLYPH_FACE (glyph
) == 0)
3000 /* If GLYPH has no face code, use FACE. */
3002 else if (FAST_GLYPH_FACE (glyph
) == last_code
)
3003 /* If it's same as previous glyph, use same result. */
3004 facecode
= last_merged
;
3007 /* Merge this glyph's face and remember the result. */
3008 last_code
= FAST_GLYPH_FACE (glyph
);
3009 last_merged
= facecode
= compute_glyph_face (f
, last_code
, face
);
3013 *to
= FAST_MAKE_GLYPH (c
, facecode
);
3021 if (to
>= s
) *to
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3028 /* Correct a glyph by replacing its specified user-level face code
3029 with a displayable computed face code. */
3032 fix_glyph (f
, glyph
, cface
)
3038 if (! FRAME_TERMCAP_P (f
))
3040 if (FAST_GLYPH_FACE (glyph
) != 0)
3041 cface
= compute_glyph_face (f
, FAST_GLYPH_FACE (glyph
), cface
);
3042 glyph
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), cface
);
3048 /* Return the column of position POS / POS_BYTE in window W's buffer.
3049 The result is rounded down to a multiple of the internal width of W.
3050 This is the amount of indentation of position POS
3051 that is not visible in its horizontal position in the window. */
3054 pos_tab_offset (w
, pos
, pos_byte
)
3056 register int pos
, pos_byte
;
3059 int opoint_byte
= PT_BYTE
;
3061 int width
= window_internal_width (w
) - 1;
3064 return MINI_WINDOW_P (w
) ? -minibuf_prompt_width
: 0;
3066 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3069 TEMP_SET_PT_BOTH (pos
, pos_byte
);
3070 col
= current_column ();
3071 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
3076 /* Display one line of window W, starting at char position START in W's buffer.
3077 START_BYTE is the corresponding byte position.
3079 Display starting at horizontal position HPOS, expressed relative to
3080 W's left edge. In situations where the text at START shouldn't
3081 start at the left margin (i.e. when the window is hscrolled, or
3082 we're continuing a line which left off in the midst of a
3083 multi-column character), HPOS should be negative; we throw away
3084 characters up 'til hpos = 0. So, HPOS must take hscrolling into
3087 TABOFFSET is an offset for ostensible hpos, used in tab stop calculations.
3089 OVSTR_DONE is the number of chars of overlay before/after strings
3090 at this position which have already been processed.
3092 Display on position VPOS on the frame. It is origin 0, relative to
3093 the top of the frame, not W.
3095 Returns a STRUCT POSITION giving character to start next line with
3096 and where to display it, including a zero or negative hpos.
3097 The vpos field is not really a vpos; it is 1 unless the line is continued */
3099 struct position val_display_text_line
;
3101 static struct position
*
3102 display_text_line (w
, start
, start_byte
, vpos
, hpos
, taboffset
, ovstr_done
)
3110 register int pos
= start
;
3111 int pos_byte
= start_byte
;
3114 int pause
, limit_byte
;
3115 register unsigned char *p
;
3117 register GLYPH
*leftmargin
;
3118 register GLYPH
*p1prev
;
3119 register GLYPH
*p1start
;
3120 GLYPH
*p1_wide_column_end
= (GLYPH
*) 0;
3121 int prevpos
, prevpos_byte
;
3123 FRAME_PTR f
= XFRAME (w
->frame
);
3124 int tab_width
= XINT (current_buffer
->tab_width
);
3125 int ctl_arrow
= !NILP (current_buffer
->ctl_arrow
);
3126 int width
= window_internal_width (w
) - 1;
3127 struct position val
;
3128 int lastpos
, lastpos_byte
;
3130 int last_invis_skip
= 0;
3131 Lisp_Object last_invis_prop
;
3132 int hscroll
= XINT (w
->hscroll
);
3133 int truncate
= (hscroll
3134 || (truncate_partial_width_windows
3135 && !WINDOW_FULL_WIDTH_P (w
))
3136 || !NILP (current_buffer
->truncate_lines
));
3138 /* 1 if this buffer has a region to highlight. */
3139 int highlight_region
3140 = (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
)
3141 && XMARKER (current_buffer
->mark
)->buffer
!= 0);
3142 int region_beg
, region_end
;
3144 int selective
= (INTEGERP (current_buffer
->selective_display
)
3145 ? XINT (current_buffer
->selective_display
)
3146 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
3147 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
3148 register struct Lisp_Char_Table
*dp
= window_display_table (w
);
3150 Lisp_Object default_invis_vector
[3];
3151 /* Number of characters of ellipsis to display after an invisible line
3152 if it calls for an ellipsis.
3153 Note that this value can be nonzero regardless of whether
3154 selective display is enabled--you must check that separately. */
3156 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3157 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->size
3158 : !NILP (current_buffer
->selective_display_ellipses
) ? 3 : 0);
3159 /* This is the sequence of Lisp objects to display
3160 when there are invisible lines. */
3161 Lisp_Object
*invis_vector_contents
3162 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3163 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->contents
3164 : default_invis_vector
);
3166 GLYPH truncator
= (dp
== 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp
))
3167 || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp
)))
3168 ? '$' : XINT (DISP_TRUNC_GLYPH (dp
)));
3169 GLYPH continuer
= (dp
== 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp
))
3170 || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp
)))
3171 ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp
)));
3173 /* If 1, we must handle multibyte characters. */
3174 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
3175 /* Length of multibyte form of each character. */
3177 /* Glyphs generated should be set this bit mask if text must be
3178 displayed from right to left. */
3179 GLYPH rev_dir_bit
= (NILP (current_buffer
->direction_reversed
)
3180 ? 0 : GLYPH_MASK_REV_DIR
);
3182 /* The next buffer location at which the face should change, due
3183 to overlays or text property changes. */
3184 int next_face_change
;
3186 /* The next location where the `invisible' property changes, or an
3187 overlay starts or ends. */
3190 /* The face we're currently using. */
3191 int current_face
= 0;
3194 XSETFASTINT (default_invis_vector
[2], '.');
3195 default_invis_vector
[0] = default_invis_vector
[1] = default_invis_vector
[2];
3197 get_display_line (f
, vpos
, WINDOW_LEFT_MARGIN (w
));
3198 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
3200 /* Show where to highlight the region. */
3201 if (highlight_region
3202 /* Maybe highlight only in selected window. */
3203 && (highlight_nonselected_windows
3204 || w
== XWINDOW (selected_window
)
3205 || (MINI_WINDOW_P (XWINDOW (selected_window
))
3206 && w
== XWINDOW (Vminibuf_scroll_window
))))
3208 region_beg
= marker_position (current_buffer
->mark
);
3209 if (PT
< region_beg
)
3211 region_end
= region_beg
;
3216 w
->region_showing
= Qt
;
3220 region_beg
= region_end
= -1;
3221 w
->region_showing
= Qnil
;
3224 if (MINI_WINDOW_P (w
)
3226 && vpos
== XFASTINT (w
->top
))
3228 if (! NILP (minibuf_prompt
))
3230 int old_width
= minibuf_prompt_width
;
3232 minibuf_prompt_width
3233 = (display_string (w
, vpos
, XSTRING (minibuf_prompt
)->data
,
3234 STRING_BYTES (XSTRING (minibuf_prompt
)),
3235 hpos
+ WINDOW_LEFT_MARGIN (w
),
3236 /* Display a space if we truncate. */
3239 /* Truncate the prompt a little before the
3240 margin, so user input can at least start
3241 on the first line. */
3242 (XFASTINT (w
->width
) > 10
3243 ? XFASTINT (w
->width
) - 4 : -1),
3244 STRING_MULTIBYTE (minibuf_prompt
))
3245 - hpos
- WINDOW_LEFT_MARGIN (w
));
3246 hpos
+= minibuf_prompt_width
;
3247 taboffset
-= minibuf_prompt_width
- old_width
;
3250 minibuf_prompt_width
= 0;
3253 /* If we're hscrolled at all, use compute_motion to skip over any
3254 text off the left edge of the window. compute_motion may know
3255 tricks to do this faster than we can. */
3258 struct position
*left_edge
3259 = compute_motion (pos
, vpos
, hpos
, 0,
3261 width
, hscroll
, taboffset
, w
);
3263 /* Retrieve the buffer position and column provided by
3264 compute_motion. We can't assume that the column will be
3265 zero, because you may have multi-column characters crossing
3268 compute_motion may have moved us past the screen position we
3269 requested, if we hit a multi-column character, or the end of
3270 the line. If so, back up. */
3271 if (left_edge
->vpos
> vpos
3272 || left_edge
->hpos
> 0)
3274 pos
= left_edge
->bufpos
;
3275 pos_byte
= left_edge
->bytepos
;
3276 DEC_BOTH (pos
, pos_byte
);
3277 hpos
= left_edge
->prevhpos
;
3281 pos
= left_edge
->bufpos
;
3282 pos_byte
= left_edge
->bytepos
;
3283 hpos
= left_edge
->hpos
;
3287 hpos
+= WINDOW_LEFT_MARGIN (w
);
3289 desired_glyphs
->bufp
[vpos
] = start
;
3290 p1
= desired_glyphs
->glyphs
[vpos
] + hpos
;
3292 charstart
= desired_glyphs
->charstarts
[vpos
] + hpos
;
3293 /* In case we don't ever write anything into it... */
3294 desired_glyphs
->charstarts
[vpos
][WINDOW_LEFT_MARGIN (w
)] = -1;
3295 leftmargin
= desired_glyphs
->glyphs
[vpos
] + WINDOW_LEFT_MARGIN (w
);
3296 endp
= leftmargin
+ width
;
3298 /* Arrange the overlays nicely for our purposes. Usually, we call
3299 display_text_line on only one line at a time, in which case this
3300 can't really hurt too much, or we call it on lines which appear
3301 one after another in the buffer, in which case all calls to
3302 recenter_overlay_lists but the first will be pretty cheap. */
3303 recenter_overlay_lists (current_buffer
, pos
);
3305 /* Loop generating characters.
3306 Stop at end of buffer, before newline,
3307 if reach or pass continuation column,
3308 or at face change. */
3310 limit_byte
= pos_byte
;
3311 next_face_change
= pos
;
3312 next_boundary
= pos
;
3315 prevpos_byte
= pos_byte
;
3317 /* If the window is hscrolled and point is in the invisible part of the
3318 current line beyond the left margin we can record the cursor location
3320 if (hscroll
&& start
<= PT
&& PT
< pos
&& cursor_vpos
< 0)
3323 cursor_hpos
= p1
- leftmargin
;
3328 int eat_following_binary_data
;
3334 while (pos
== next_boundary
)
3336 Lisp_Object position
, limit
, prop
, ww
;
3338 /* Display the overlay strings here, unless we're at ZV
3339 and have already displayed the appropriate strings
3340 on an earlier line. */
3341 if (pos
< ZV
|| !zv_strings_seen
++)
3344 unsigned char *ovstr
;
3345 ovlen
= overlay_strings (pos
, w
, &ovstr
);
3349 /* Skip the ones we did in a previous line. */
3350 ovstr
+= ovstr_done
;
3351 ovlen
-= ovstr_done
;
3360 c
= STRING_CHAR_AND_LENGTH (ovstr
, ovlen
, len
);
3361 ovstr
+= len
, ovlen
-= len
, ovstr_done
+= len
;
3362 charset
= CHAR_CHARSET (c
);
3363 cols
= (charset
== CHARSET_COMPOSITION
3364 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3365 : CHARSET_WIDTH (charset
));
3369 c
= *ovstr
++, ovlen
--, ovstr_done
++;
3372 g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3375 if (p1
>= leftmargin
&& p1
< endp
)
3376 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3380 /* If we did all the overlay strings
3381 and we have room for text, clear ovstr_done
3382 just for neatness' sake. */
3383 if (ovlen
== 0 && p1
< endp
)
3388 /* Did we reach point? Record the cursor location. */
3389 if (pos
== PT
&& cursor_vpos
< 0)
3392 cursor_hpos
= p1
- leftmargin
;
3398 XSETFASTINT (position
, pos
);
3399 limit
= Fnext_overlay_change (position
);
3400 #ifdef USE_TEXT_PROPERTIES
3401 /* This is just an estimate to give reasonable
3402 performance; nothing should go wrong if it is too small. */
3403 if (XFASTINT (limit
) > pos
+ 50)
3405 int limitpos
= pos
+ 50;
3406 XSETFASTINT (limit
, limitpos
);
3408 limit
= Fnext_single_property_change (position
, Qinvisible
,
3409 Fcurrent_buffer (), limit
);
3411 next_boundary
= XFASTINT (limit
);
3412 /* if the `invisible' property is set, we can skip to
3413 the next property change. */
3415 prop
= Fget_char_property (position
, Qinvisible
, ww
);
3416 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
3418 if (pos
< PT
&& next_boundary
>= PT
)
3421 cursor_hpos
= p1
- leftmargin
;
3423 pos
= next_boundary
;
3424 pos_byte
= CHAR_TO_BYTE (pos
);
3425 last_invis_skip
= pos
;
3426 last_invis_prop
= prop
;
3430 /* Did we reach point? Record the cursor location. */
3431 if (pos
== PT
&& cursor_vpos
< 0)
3434 cursor_hpos
= p1
- leftmargin
;
3437 /* Did we hit the end of the visible region of the buffer?
3441 /* Update charstarts for the end of this line. */
3442 /* Do nothing if off the left edge or at the right edge. */
3443 if (p1
>= leftmargin
&& p1
+ 1 != endp
)
3445 int *p2x
= &charstart
[(p1
< leftmargin
3453 /* Figure out where (if at all) the
3454 redisplay_end_trigger-hook should run. */
3455 if (MARKERP (w
->redisplay_end_trigger
)
3456 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
3457 e_t_h
= marker_position (w
->redisplay_end_trigger
);
3458 else if (INTEGERP (w
->redisplay_end_trigger
))
3459 e_t_h
= XINT (w
->redisplay_end_trigger
);
3463 /* If we've gone past the place to run a hook,
3465 if (pos
>= e_t_h
&& e_t_h
!= ZV
)
3467 Lisp_Object args
[3];
3469 args
[0] = Qredisplay_end_trigger_functions
;
3470 XSETWINDOW (args
[1], w
);
3471 XSETINT (args
[2], e_t_h
);
3473 /* Since we are *trying* to run these functions,
3474 don't try to run them again, even if they get an error. */
3475 w
->redisplay_end_trigger
= Qnil
;
3476 Frun_hook_with_args (3, args
);
3479 /* Notice if it changed the face of this character. */
3480 next_face_change
= pos
;
3484 /* Did we hit a face change? Figure out what face we should
3485 use now. We also hit this the first time through the
3486 loop, to see what face we should start with. */
3487 if (pos
>= next_face_change
3488 && (FRAME_WINDOW_P (f
) || FRAME_MSDOS_P (f
)))
3490 int limit
= pos
+ 50;
3492 current_face
= compute_char_face (f
, w
, pos
,
3493 region_beg
, region_end
,
3494 &next_face_change
, limit
, 0);
3498 /* Compute the next place we need to stop
3499 and do something special; set PAUSE. */
3503 if (pos
< next_boundary
&& next_boundary
< pause
)
3504 pause
= next_boundary
;
3505 if (pos
< next_face_change
&& next_face_change
< pause
)
3506 pause
= next_face_change
;
3511 /* Wouldn't you hate to read the next line to someone over
3513 if (pos
< PT
&& PT
< pause
)
3515 if (pos
< GPT
&& GPT
< pause
)
3518 /* LIMIT_BYTE is not the same place in the buffer as PAUSE.
3519 It is a limit on valid characters.
3520 We use it to bound STRING_CHAR_AND_LENGTH. */
3521 limit_byte
= ZV_BYTE
;
3522 if (pos
< GPT
&& GPT_BYTE
< limit_byte
)
3523 limit_byte
= GPT_BYTE
;
3526 int temp
= CHAR_TO_BYTE (pos
);
3527 p
= BYTE_POS_ADDR (temp
);
3535 p1_wide_column_end
= (GLYPH
*) 0;
3538 c
= STRING_CHAR_AND_LENGTH (p
, limit_byte
- pos_byte
, len
), p
+= len
;
3541 /* Let a display table override all standard display methods. */
3542 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
3544 p1
= copy_part_of_rope (f
, p1
, leftmargin
,
3545 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
3546 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
3547 current_face
, rev_dir_bit
);
3549 else if (c
>= 040 && c
< 0177)
3551 if (p1
>= leftmargin
)
3552 *p1
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3558 /* Same as p1prev, but after the invis_vector_contents text
3559 (if we have that on this line). */
3560 GLYPH
*p1prev_modified
;
3564 if (last_invis_skip
== pos
3565 && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop
))
3569 && indented_beyond_p (pos
+ 1, pos_byte
+ 1, selective
))
3571 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3574 INC_BOTH (pos
, pos_byte
);
3575 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3576 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3581 SET_PT_BOTH (opoint
, opoint_byte
);
3583 if (invis
&& selective_rlen
> 0 && p1
>= leftmargin
)
3588 cs
= charstart
+ (p1
- p1start
);
3591 p1
+= selective_rlen
;
3592 if (p1
- leftmargin
> width
)
3595 #if 0 /* This needs more work; charstarts needs to record
3596 both whether a position ho;ds an ellipsis character
3597 and what buffer position it corresponds to. */
3598 csend
= charstart
+ (p1
- p1start
);
3601 /* The idea is to use p1prev_modified instead of p1prev
3602 in the loop below over p2x. */
3603 p1prev_modified
= p1
;
3606 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3607 (p1
- p1prev
), current_face
, rev_dir_bit
);
3610 /* Update charstarts for the newline that ended this line. */
3611 /* Do nothing here for a char that's entirely off the left edge
3612 or if it starts at the right edge. */
3613 if (p1
>= leftmargin
&& p1prev
!= endp
)
3615 /* Store the newline's position into charstarts
3616 for the column where the newline starts.
3617 Store -1 for the rest of the glyphs it occupies. */
3618 int *p2x
= &charstart
[(p1prev
< leftmargin
3619 ? leftmargin
: p1prev
)
3621 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3628 /* Draw the face of the newline character as extending all the
3629 way to the end of the frame line. */
3632 if (p1
< leftmargin
)
3635 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3645 if (p1
>= leftmargin
&& p1
< endp
)
3646 *p1
= MAKE_GLYPH (f
, ' ', current_face
) | rev_dir_bit
;
3649 while ((p1
- leftmargin
+ taboffset
+ hscroll
- (hscroll
> 0))
3652 else if (c
== Ctl ('M') && selective
== -1)
3654 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3655 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3656 pos
= PT
, pos_byte
= PT_BYTE
;
3657 SET_PT_BOTH (opoint
, opoint_byte
);
3659 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3661 if (selective_rlen
> 0)
3663 p1
+= selective_rlen
;
3664 if (p1
- leftmargin
> width
)
3666 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3667 (p1
- p1prev
), current_face
, rev_dir_bit
);
3670 /* Draw the face of the newline character as extending all the
3671 way to the end of the frame line. */
3674 if (p1
< leftmargin
)
3677 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3681 /* Update charstarts for the ^M that ended this line. */
3682 /* Do nothing here for a char that's entirely off the left edge
3683 or if it starts at the right edge. */
3684 if (p1
>= leftmargin
&& p1prev
!= endp
)
3686 /* Store the newline's position into charstarts
3687 for the column where the newline starts.
3688 Store -1 for the rest of the glyphs it occupies. */
3689 int *p2x
= &charstart
[(p1prev
< leftmargin
3690 ? leftmargin
: p1prev
)
3692 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3700 else if (c
< 0200 && ctl_arrow
)
3702 if (p1
>= leftmargin
)
3704 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
3705 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
3706 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
3710 if (p1
>= leftmargin
&& p1
< endp
)
3711 *p1
= MAKE_GLYPH (f
, c
^ 0100, current_face
) | rev_dir_bit
;
3716 /* C is not a multibyte character. */
3717 eat_following_binary_data
= multibyte
&& BASE_LEADING_CODE_P (c
);
3719 label_display_binary_data
:
3721 if (p1
>= leftmargin
&& p1
< endp
)
3723 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
3724 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
3725 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
3729 if (p1
>= leftmargin
&& p1
< endp
)
3730 *p1
= MAKE_GLYPH (f
, (c
>> 6) + '0', current_face
) | rev_dir_bit
;
3732 if (p1
>= leftmargin
&& p1
< endp
)
3733 *p1
= (MAKE_GLYPH (f
, (7 & (c
>> 3)) + '0', current_face
)
3736 if (p1
>= leftmargin
&& p1
< endp
)
3737 *p1
= MAKE_GLYPH (f
, (7 & c
) + '0', current_face
) | rev_dir_bit
;
3739 } while (eat_following_binary_data
3740 && (pos_byte
+ len
) < limit_byte
3741 && ! CHAR_HEAD_P (*p
)
3742 && ((c
= *p
++), len
++));
3746 /* C is a multibyte character. */
3747 int charset
= CHAR_CHARSET (c
);
3748 int columns
= (charset
== CHARSET_COMPOSITION
3749 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3750 : CHARSET_WIDTH (charset
));
3751 GLYPH g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3755 if (p1
>= leftmargin
&& p1
< endp
)
3756 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3760 p1_wide_column_end
= p1
;
3761 /* Check if binary data follows it. */
3762 if (pos_byte
+ len
< limit_byte
3763 && ! CHAR_HEAD_P (*p
))
3765 eat_following_binary_data
= 1;
3768 goto label_display_binary_data
;
3773 prevpos_byte
= pos_byte
;
3777 /* Update charstarts for the character just output. */
3779 /* Do nothing here for a char that's entirely off the left edge. */
3780 if (p1
>= leftmargin
)
3782 /* Store the char's position into charstarts
3783 for the first glyph occupied by this char.
3784 Store -1 for the rest of the glyphs it occupies. */
3787 int *p2x
= &charstart
[(p1prev
< leftmargin
3788 ? leftmargin
: p1prev
)
3790 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3800 val
.hpos
= - XINT (w
->hscroll
);
3807 lastpos_byte
= pos_byte
;
3809 /* Store 0 in this charstart line for the positions where
3810 there is no character. But do leave what was recorded
3811 for the character that ended the line. */
3812 /* Add 1 in the endtest to compensate for the fact that ENDP was
3813 made from WIDTH, which is 1 less than the window's actual
3815 i
= p1
- p1start
+ 1;
3816 if (p1
< leftmargin
)
3817 i
+= leftmargin
- p1
;
3818 for (; i
< endp
- p1start
+ 1; i
++)
3821 /* Handle continuation in middle of a character */
3822 /* by backing up over it */
3825 /* Don't back up if we never actually displayed any text.
3826 This occurs when the minibuffer prompt takes up the whole line. */
3829 /* Start the next line with that same character whose
3830 character code is C and the length of multi-byte form is
3833 pos_byte
= prevpos_byte
;
3835 if (p1_wide_column_end
< endp
)
3836 /* As ENDP is not in the middle of wide-column character,
3837 we can break the line at ENDP and start from the middle
3838 column in the next line. So, adjust VAL.HPOS to skip
3839 the columns output on this line. */
3840 val
.hpos
+= p1prev
- endp
;
3843 /* We displayed a wide-column character at around ENDP.
3844 Since we can't broke it in the middle, the whole
3845 character should be driven into the next line. */
3846 /* As the result, the actual columns occupied by the
3847 text on this line is less than WIDTH. VAL.TAB_OFFSET
3848 must be adjusted. */
3849 taboffset
= taboffset
+ (p1prev
- endp
);
3850 /* Let's fill unused columns with TRUNCATOR or CONTINUER. */
3852 GLYPH g
= fix_glyph (f
, truncate
? truncator
: continuer
, 0);
3853 while (p1prev
< endp
)
3856 /* If POINT is at POS, cursor should not on this line. */
3858 lastpos_byte
= pos_byte
;
3864 /* Keep in this line everything up to the continuation column. */
3868 /* Finish deciding which character to start the next line on,
3869 and what hpos to start it at.
3870 Also set `lastpos' to the last position which counts as "on this line"
3871 for cursor-positioning. */
3875 if (FETCH_BYTE (pos_byte
) == '\n')
3877 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3879 /* If stopped due to a newline, start next line after it */
3880 SET_PT_BOTH (pos
+ 1, pos_byte
+ 1);
3883 /* Check again for hidden lines, in case the newline occurred exactly
3884 at the right margin. */
3885 while (PT
< ZV
&& selective
> 0
3886 && indented_beyond_p (PT
, PT_BYTE
, selective
))
3887 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3889 pos
= PT
, pos_byte
= PT_BYTE
;
3890 SET_PT_BOTH (opoint
, opoint_byte
);
3893 /* Stopped due to right margin of window */
3897 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3899 SET_PT_BOTH (pos
, pos_byte
);
3900 *p1
++ = fix_glyph (f
, truncator
, 0);
3901 /* Truncating => start next line after next newline,
3902 and point is on this line if it is before the newline,
3903 and skip none of first char of next line */
3905 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3906 while (PT
< ZV
&& selective
> 0
3907 && indented_beyond_p (PT
, PT_BYTE
, selective
));
3908 pos
= PT
, pos_byte
= PT_BYTE
;
3909 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
3910 SET_PT_BOTH (opoint
, opoint_byte
);
3912 lastpos
= pos
- (FETCH_BYTE (pos_byte
- 1) == '\n');
3913 lastpos_byte
= CHAR_TO_BYTE (lastpos
);
3918 *p1
++ = fix_glyph (f
, continuer
, 0);
3920 DEC_BOTH (lastpos
, lastpos_byte
);
3921 val
.tab_offset
= taboffset
+ width
;
3928 /* If point is at eol or in invisible text at eol,
3929 record its frame location now. */
3931 if (start
<= PT
&& PT
<= lastpos
&& cursor_vpos
< 0)
3934 cursor_hpos
= p1
- leftmargin
;
3937 if (cursor_vpos
== vpos
)
3939 if (cursor_hpos
< 0) cursor_hpos
= 0;
3940 if (cursor_hpos
> width
) cursor_hpos
= width
;
3941 cursor_hpos
+= WINDOW_LEFT_MARGIN (w
);
3942 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
3944 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (f
)
3945 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
)))
3947 FRAME_CURSOR_Y (f
) = cursor_vpos
;
3948 FRAME_CURSOR_X (f
) = cursor_hpos
;
3951 if (w
== XWINDOW (selected_window
))
3953 /* Line is not continued and did not start
3954 in middle of character */
3955 if ((hpos
- WINDOW_LEFT_MARGIN (w
)
3956 == (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
3959 this_line_bufpos
= start
;
3960 this_line_buffer
= current_buffer
;
3961 this_line_vpos
= cursor_vpos
;
3962 this_line_start_hpos
= hpos
- WINDOW_LEFT_MARGIN (w
);
3963 this_line_endpos
= Z
- lastpos
;
3966 this_line_bufpos
= 0;
3971 /* If hscroll and line not empty, insert truncation-at-left marker */
3972 if (hscroll
&& lastpos
!= start
)
3974 GLYPH g
= fix_glyph (f
, truncator
, 0);
3976 if (p1
<= leftmargin
)
3977 p1
= leftmargin
+ 1;
3978 else /* MULE: it may be a wide-column character */
3980 p1prev
= leftmargin
+ 1;
3981 while (p1prev
< p1
&& *p1prev
& GLYPH_MASK_PADDING
)
3986 if (!WINDOW_RIGHTMOST_P (w
))
3989 if (p1
< leftmargin
) p1
= leftmargin
;
3990 while (p1
< endp
) *p1
++ = SPACEGLYPH
;
3992 /* Don't draw vertical bars if we're using scroll bars. They're
3993 covered up by the scroll bars, and it's distracting to see
3994 them when the scroll bar windows are flickering around to be
3996 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
3999 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
4002 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
4003 *p1
++ = (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
4004 ? XINT (DISP_BORDER_GLYPH (dp
))
4007 desired_glyphs
->used
[vpos
] = max (desired_glyphs
->used
[vpos
],
4008 p1
- desired_glyphs
->glyphs
[vpos
]);
4009 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
4011 /* If the start of this line is the overlay arrow-position,
4012 then put the arrow string into the display-line. */
4014 if (MARKERP (Voverlay_arrow_position
)
4015 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
4016 && start
== marker_position (Voverlay_arrow_position
)
4017 && STRINGP (Voverlay_arrow_string
)
4018 && ! overlay_arrow_seen
)
4021 int len
= XSTRING (Voverlay_arrow_string
)->size
;
4027 if (!NULL_INTERVAL_P (XSTRING (Voverlay_arrow_string
)->intervals
))
4029 /* If the arrow string has text props, obey them when displaying. */
4030 for (i
= 0, i_byte
= 0; i
< len
; )
4033 Lisp_Object face
, ilisp
;
4036 if (STRING_MULTIBYTE (Voverlay_arrow_string
))
4037 FETCH_STRING_CHAR_ADVANCE (c
, Voverlay_arrow_string
, i
, i_byte
);
4039 c
= XSTRING (Voverlay_arrow_string
)->data
[i
++];
4041 XSETFASTINT (ilisp
, i
);
4042 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
4043 newface
= compute_glyph_face_1 (f
, face
, 0);
4044 leftmargin
[i
] = FAST_MAKE_GLYPH (c
, newface
);
4048 #endif /* HAVE_FACES */
4050 for (i
= 0; i
< len
; i
++)
4051 leftmargin
[i
] = p
[i
];
4054 /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */
4055 arrow_end
= (leftmargin
- desired_glyphs
->glyphs
[vpos
]) + len
;
4056 if (desired_glyphs
->used
[vpos
] < arrow_end
)
4057 desired_glyphs
->used
[vpos
] = arrow_end
;
4059 overlay_arrow_seen
= 1;
4063 val
.bytepos
= pos_byte
;
4064 val
.ovstring_chars_done
= ovstr_done
;
4065 val_display_text_line
= val
;
4066 return &val_display_text_line
;
4069 /* Redisplay the menu bar in the frame for window W. */
4072 display_menu_bar (w
)
4075 Lisp_Object items
, tail
;
4076 register int vpos
= 0;
4077 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4078 int maxendcol
= FRAME_WIDTH (f
);
4083 if (!NILP (Vwindow_system
))
4087 #ifdef USE_X_TOOLKIT
4090 #endif /* USE_X_TOOLKIT */
4092 get_display_line (f
, vpos
, 0);
4094 items
= FRAME_MENU_BAR_ITEMS (f
);
4095 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
4097 Lisp_Object pos
, string
;
4098 string
= XVECTOR (items
)->contents
[i
+ 1];
4102 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], hpos
);
4104 if (hpos
< maxendcol
)
4105 hpos
= display_string (w
, vpos
,
4106 XSTRING (string
)->data
,
4107 STRING_BYTES (XSTRING (string
)),
4108 hpos
, 0, 0, hpos
, maxendcol
,
4109 STRING_MULTIBYTE (string
));
4110 /* Put a space between items. */
4111 if (hpos
< maxendcol
)
4113 int hpos1
= hpos
+ 1;
4114 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0,
4115 min (hpos1
, maxendcol
), maxendcol
, 0);
4119 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4120 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4122 /* Fill out the line with spaces. */
4123 if (maxendcol
> hpos
)
4124 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0, maxendcol
, maxendcol
, 0);
4126 /* Clear the rest of the lines allocated to the menu bar. */
4128 while (vpos
< FRAME_MENU_BAR_LINES (f
))
4129 get_display_line (f
, vpos
++, 0);
4132 /* Display the mode line for window w */
4135 display_mode_line (w
)
4138 register int vpos
= XFASTINT (w
->height
) + XFASTINT (w
->top
) - 1;
4139 register int left
= WINDOW_LEFT_MARGIN (w
);
4140 register int right
= WINDOW_RIGHT_MARGIN (w
);
4141 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4143 line_number_displayed
= 0;
4144 w
->column_number_displayed
= Qnil
;
4146 get_display_line (f
, vpos
, left
);
4148 /* Temporarily make frame F's kboard the current kboard
4149 so that kboard-local variables in the mode_line_format
4150 will get the right values. */
4151 push_frame_kboard (f
);
4153 display_mode_element (w
, vpos
, left
, 0, right
, right
,
4154 current_buffer
->mode_line_format
);
4156 pop_frame_kboard ();
4158 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4160 /* Put the mode line in inverse video.
4161 Use faces if possible, since that lets us handle
4162 partial-width windows and avoid inverting the scroll bar columns. */
4164 if (! FRAME_TERMCAP_P (f
) && mode_line_inverse_video
)
4166 /* For a partial width window, explicitly set face of each glyph. */
4168 unsigned int padding
;
4169 GLYPH
*ptr
= FRAME_DESIRED_GLYPHS (f
)->glyphs
[vpos
];
4170 for (i
= left
; i
< right
; ++i
)
4172 padding
= ptr
[i
] & GLYPH_MASK_PADDING
;
4173 ptr
[i
] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr
[i
]), 1) | padding
;
4179 /* Make the mode line inverse video if the entire line
4180 is made of mode lines.
4181 I.e. if this window is full width,
4182 or if it is the child of a full width window
4183 (which implies that that window is split side-by-side
4184 and the rest of this line is mode lines of the sibling windows). */
4185 if (WINDOW_FULL_WIDTH_P (w
)
4186 || WINDOW_FULL_WIDTH_P (XWINDOW (w
->parent
)))
4187 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4190 /* Contribute ELT to the mode line for window W.
4191 How it translates into text depends on its data type.
4193 VPOS is the position of the mode line being displayed.
4195 HPOS is the position (absolute on frame) where this element's text
4196 should start. The output is truncated automatically at the right
4199 DEPTH is the depth in recursion. It is used to prevent
4200 infinite recursion here.
4202 MINENDCOL is the hpos before which the element may not end.
4203 The element is padded at the right with spaces if nec
4204 to reach this column.
4206 MAXENDCOL is the hpos past which this element may not extend.
4207 If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority.
4208 (This is necessary to make nested padding and truncation work.)
4210 Returns the hpos of the end of the text generated by ELT.
4211 The next element will receive that value as its HPOS arg,
4212 so as to concatenate the elements. */
4215 display_mode_element (w
, vpos
, hpos
, depth
, minendcol
, maxendcol
, elt
)
4217 register int vpos
, hpos
;
4220 register int maxendcol
;
4221 register Lisp_Object elt
;
4229 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
4233 /* A string: output it and check for %-constructs within it. */
4234 register unsigned char c
;
4235 register unsigned char *this = XSTRING (elt
)->data
;
4237 while (hpos
< maxendcol
&& *this)
4239 unsigned char *last
= this;
4240 while ((c
= *this++) != '\0' && c
!= '%')
4242 if (this - 1 != last
)
4244 register int lim
= --this - last
+ hpos
;
4245 if (frame_title_ptr
)
4246 hpos
= store_frame_title (last
, hpos
, min (lim
, maxendcol
));
4248 hpos
= display_string (w
, vpos
, last
, -1, hpos
, 0, 1,
4249 hpos
, min (lim
, maxendcol
),
4250 STRING_MULTIBYTE (elt
));
4254 register int minendcol
;
4255 register int spec_width
= 0;
4257 /* We can't allow -ve args due to the "%-" construct */
4258 /* Argument specifies minwidth but not maxwidth
4259 (maxwidth can be specified by
4260 (<negative-number> . <stuff>) mode-line elements) */
4262 while ((c
= *this++) >= '0' && c
<= '9')
4264 spec_width
= spec_width
* 10 + (c
- '0');
4267 minendcol
= hpos
+ spec_width
;
4268 if (minendcol
> maxendcol
)
4270 spec_width
= maxendcol
- hpos
;
4271 minendcol
= maxendcol
;
4275 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4276 spec_width
, maxendcol
,
4277 Vglobal_mode_string
);
4280 char *spec
= decode_mode_spec (w
, c
, spec_width
,
4282 if (frame_title_ptr
)
4283 hpos
= store_frame_title (spec
, minendcol
, maxendcol
);
4285 hpos
= display_string (w
, vpos
, spec
, -1,
4287 minendcol
, maxendcol
, -1);
4295 /* A symbol: process the value of the symbol recursively
4296 as if it appeared here directly. Avoid error if symbol void.
4297 Special case: if value of symbol is a string, output the string
4300 register Lisp_Object tem
;
4301 tem
= Fboundp (elt
);
4304 tem
= Fsymbol_value (elt
);
4305 /* If value is a string, output that string literally:
4306 don't check for % within it. */
4309 if (frame_title_ptr
)
4310 hpos
= store_frame_title (XSTRING (tem
)->data
,
4311 minendcol
, maxendcol
);
4313 hpos
= display_string (w
, vpos
, XSTRING (tem
)->data
,
4314 STRING_BYTES (XSTRING (tem
)),
4315 hpos
, 0, 1, minendcol
, maxendcol
,
4316 STRING_MULTIBYTE (tem
));
4318 /* Give up right away for nil or t. */
4319 else if (!EQ (tem
, elt
))
4320 { elt
= tem
; goto tail_recurse
; }
4327 register Lisp_Object car
, tem
;
4329 /* A cons cell: three distinct cases.
4330 If first element is a string or a cons, process all the elements
4331 and effectively concatenate them.
4332 If first element is a negative number, truncate displaying cdr to
4333 at most that many characters. If positive, pad (with spaces)
4334 to at least that many characters.
4335 If first element is a symbol, process the cadr or caddr recursively
4336 according to whether the symbol's value is non-nil or nil. */
4337 car
= XCONS (elt
)->car
;
4340 tem
= Fboundp (car
);
4341 elt
= XCONS (elt
)->cdr
;
4344 /* elt is now the cdr, and we know it is a cons cell.
4345 Use its car if CAR has a non-nil value. */
4348 tem
= Fsymbol_value (car
);
4350 { elt
= XCONS (elt
)->car
; goto tail_recurse
; }
4352 /* Symbol's value is nil (or symbol is unbound)
4353 Get the cddr of the original list
4354 and if possible find the caddr and use that. */
4355 elt
= XCONS (elt
)->cdr
;
4358 else if (!CONSP (elt
))
4360 elt
= XCONS (elt
)->car
;
4363 else if (INTEGERP (car
))
4365 register int lim
= XINT (car
);
4366 elt
= XCONS (elt
)->cdr
;
4368 /* Negative int means reduce maximum width.
4369 DO NOT change MINENDCOL here!
4370 (20 -10 . foo) should truncate foo to 10 col
4371 and then pad to 20. */
4372 maxendcol
= min (maxendcol
, hpos
- lim
);
4375 /* Padding specified. Don't let it be more than
4378 if (lim
> maxendcol
)
4380 /* If that's more padding than already wanted, queue it.
4381 But don't reduce padding already specified even if
4382 that is beyond the current truncation point. */
4383 if (lim
> minendcol
)
4388 else if (STRINGP (car
) || CONSP (car
))
4390 register int limit
= 50;
4391 /* LIMIT is to protect against circular lists. */
4392 while (CONSP (elt
) && --limit
> 0
4393 && hpos
< maxendcol
)
4395 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4398 elt
= XCONS (elt
)->cdr
;
4406 if (frame_title_ptr
)
4407 hpos
= store_frame_title ("*invalid*", minendcol
, maxendcol
);
4409 hpos
= display_string (w
, vpos
, "*invalid*", -1, hpos
, 0, 1,
4410 minendcol
, maxendcol
, 0);
4414 if (minendcol
> hpos
)
4415 if (frame_title_ptr
)
4416 hpos
= store_frame_title ("", minendcol
, maxendcol
);
4418 hpos
= display_string (w
, vpos
, "", 0, hpos
,
4419 0, 1, minendcol
, maxendcol
, 0);
4423 /* Write a null-terminated, right justified decimal representation of
4424 the positive integer D to BUF using a minimal field width WIDTH. */
4427 pint2str (buf
, width
, d
)
4432 register char *p
= buf
;
4439 *p
++ = d
% 10 + '0';
4442 for (width
-= (int) (p
- buf
); width
> 0; --width
) *p
++ = ' ';
4452 /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF.
4453 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
4454 type of CODING_SYSTEM. Return updated pointer into BUF. */
4457 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
4458 Lisp_Object coding_system
;
4463 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
4465 val
= coding_system
;
4467 if (NILP (val
)) /* Not yet decided. */
4472 *buf
++ = eol_mnemonic_undecided
;
4473 /* Don't mention EOL conversion if it isn't decided. */
4477 Lisp_Object eolvalue
;
4479 eolvalue
= Fget (coding_system
, Qeol_type
);
4481 while (!NILP (val
) && SYMBOLP (val
))
4483 val
= Fget (val
, Qcoding_system
);
4484 if (NILP (eolvalue
))
4485 eolvalue
= Fget (val
, Qeol_type
);
4489 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
4493 /* The EOL conversion we are using. */
4495 /* The EOL conversion that is normal on this system. */
4497 if (NILP (eolvalue
)) /* Not yet decided. */
4498 eoltype
= eol_mnemonic_undecided
;
4499 else if (VECTORP (eolvalue
)) /* Not yet decided. */
4500 eoltype
= eol_mnemonic_undecided
;
4501 else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */
4502 eoltype
= (XFASTINT (eolvalue
) == 0
4504 : (XFASTINT (eolvalue
) == 1
4505 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
4507 /* Mention the EOL conversion if it is not the usual one. */
4514 /* Return a string for the output of a mode line %-spec for window W,
4515 generated by character C. SPEC_WIDTH is the field width when
4516 padding to the left (%c, %l). The value returned from this
4517 function will later be truncated to width MAXWIDTH. */
4519 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
4522 decode_mode_spec (w
, c
, spec_width
, maxwidth
)
4525 register int spec_width
;
4526 register int maxwidth
;
4529 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4530 char *decode_mode_spec_buf
= (char *) FRAME_TEMP_GLYPHS (f
)->total_contents
;
4531 struct buffer
*b
= XBUFFER (w
->buffer
);
4534 if (maxwidth
> FRAME_WIDTH (f
))
4535 maxwidth
= FRAME_WIDTH (f
);
4540 if (!NILP (b
->read_only
))
4542 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4547 /* This differs from %* only for a modified read-only buffer. */
4548 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4550 if (!NILP (b
->read_only
))
4555 /* This differs from %* in ignoring read-only-ness. */
4556 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4568 if (command_loop_level
> 5)
4570 p
= decode_mode_spec_buf
;
4571 for (i
= 0; i
< command_loop_level
; i
++)
4574 return decode_mode_spec_buf
;
4582 if (command_loop_level
> 5)
4584 p
= decode_mode_spec_buf
;
4585 for (i
= 0; i
< command_loop_level
; i
++)
4588 return decode_mode_spec_buf
;
4596 if (maxwidth
< sizeof (lots_of_dashes
))
4597 return lots_of_dashes
;
4600 for (p
= decode_mode_spec_buf
, i
= maxwidth
; i
> 0; i
--)
4604 return decode_mode_spec_buf
;
4610 if (maxwidth
>= 3 && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4612 bcopy (XSTRING (obj
)->data
, decode_mode_spec_buf
, maxwidth
- 1);
4613 decode_mode_spec_buf
[maxwidth
- 1] = '\\';
4614 decode_mode_spec_buf
[maxwidth
] = '\0';
4615 return decode_mode_spec_buf
;
4622 int col
= current_column ();
4623 XSETFASTINT (w
->column_number_displayed
, col
);
4624 pint2str (decode_mode_spec_buf
, spec_width
, col
);
4625 return decode_mode_spec_buf
;
4629 /* %F displays the frame name. */
4630 /* Systems that can only display a single frame at a time should
4631 NOT replace the frame name with the (constant) frame title,
4632 since then they won't be able to tell which frame is that. */
4633 if (FRAME_WINDOW_P (f
) && !NILP (f
->title
))
4634 return (char *) XSTRING (f
->title
)->data
;
4635 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
4636 return (char *) XSTRING (f
->name
)->data
;
4644 else if (STRINGP (obj
) && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4646 bcopy ("...", decode_mode_spec_buf
, 3);
4647 bcopy (XSTRING (obj
)->data
+ STRING_BYTES (XSTRING (obj
)) - maxwidth
+ 3,
4648 decode_mode_spec_buf
+ 3, maxwidth
- 3);
4649 return decode_mode_spec_buf
;
4656 int startpos
= XMARKER (w
->start
)->charpos
;
4657 int startpos_byte
= marker_byte_position (w
->start
);
4658 int line
, linepos
, linepos_byte
, topline
;
4661 int height
= XFASTINT (w
->height
);
4663 /* If we decided that this buffer isn't suitable for line numbers,
4664 don't forget that too fast. */
4665 if (EQ (w
->base_line_pos
, w
->buffer
))
4667 /* But do forget it, if the window shows a different buffer now. */
4668 else if (BUFFERP (w
->base_line_pos
))
4669 w
->base_line_pos
= Qnil
;
4671 /* If the buffer is very big, don't waste time. */
4672 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
4674 w
->base_line_pos
= Qnil
;
4675 w
->base_line_number
= Qnil
;
4679 if (!NILP (w
->base_line_number
)
4680 && !NILP (w
->base_line_pos
)
4681 && XFASTINT (w
->base_line_pos
) <= startpos
)
4683 line
= XFASTINT (w
->base_line_number
);
4684 linepos
= XFASTINT (w
->base_line_pos
);
4685 linepos_byte
= buf_charpos_to_bytepos (b
, linepos
);
4690 linepos
= BUF_BEGV (b
);
4691 linepos_byte
= BUF_BEGV_BYTE (b
);
4694 /* Count lines from base line to window start position. */
4695 nlines
= display_count_lines (linepos
, linepos_byte
,
4699 topline
= nlines
+ line
;
4701 /* Determine a new base line, if the old one is too close
4702 or too far away, or if we did not have one.
4703 "Too close" means it's plausible a scroll-down would
4705 if (startpos
== BUF_BEGV (b
))
4707 XSETFASTINT (w
->base_line_number
, topline
);
4708 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
4710 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
4711 || linepos
== BUF_BEGV (b
))
4713 int limit
= BUF_BEGV (b
);
4714 int limit_byte
= BUF_BEGV_BYTE (b
);
4716 int distance
= (height
* 2 + 30) * 200;
4718 if (startpos
- distance
> limit
)
4720 limit
= startpos
- distance
;
4721 limit_byte
= CHAR_TO_BYTE (limit
);
4724 nlines
= display_count_lines (startpos
, startpos_byte
,
4726 - (height
* 2 + 30),
4728 /* If we couldn't find the lines we wanted within
4730 give up on line numbers for this window. */
4731 if (position
== limit_byte
&& limit
== startpos
- distance
)
4733 w
->base_line_pos
= w
->buffer
;
4734 w
->base_line_number
= Qnil
;
4738 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
4739 XSETFASTINT (w
->base_line_pos
, BYTE_TO_CHAR (position
));
4742 /* Now count lines from the start pos to point. */
4743 nlines
= display_count_lines (startpos
, startpos_byte
,
4744 PT_BYTE
, PT
, &junk
);
4746 /* Record that we did display the line number. */
4747 line_number_displayed
= 1;
4749 /* Make the string to show. */
4750 pint2str (decode_mode_spec_buf
, spec_width
, topline
+ nlines
);
4751 return decode_mode_spec_buf
;
4754 char* p
= decode_mode_spec_buf
;
4755 for (spec_width
-= 2; spec_width
> 0; --spec_width
) *p
++ = ' ';
4757 return decode_mode_spec_buf
;
4767 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
4773 int pos
= marker_position (w
->start
);
4774 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4776 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
4778 if (pos
<= BUF_BEGV (b
))
4783 else if (pos
<= BUF_BEGV (b
))
4787 if (total
> 1000000)
4788 /* Do it differently for a large value, to avoid overflow. */
4789 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4791 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4792 /* We can't normally display a 3-digit number,
4793 so get us a 2-digit number that is close. */
4796 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4797 return decode_mode_spec_buf
;
4801 /* Display percentage of size above the bottom of the screen. */
4804 int toppos
= marker_position (w
->start
);
4805 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
4806 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4808 if (botpos
>= BUF_ZV (b
))
4810 if (toppos
<= BUF_BEGV (b
))
4817 if (total
> 1000000)
4818 /* Do it differently for a large value, to avoid overflow. */
4819 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4821 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4822 /* We can't normally display a 3-digit number,
4823 so get us a 2-digit number that is close. */
4826 if (toppos
<= BUF_BEGV (b
))
4827 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
4829 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4830 return decode_mode_spec_buf
;
4835 /* status of process */
4836 obj
= Fget_buffer_process (w
->buffer
);
4838 return "no process";
4840 obj
= Fsymbol_name (Fprocess_status (obj
));
4844 case 't': /* indicate TEXT or BINARY */
4845 #ifdef MODE_LINE_BINARY_TEXT
4846 return MODE_LINE_BINARY_TEXT (b
);
4852 /* coding-system (not including end-of-line format) */
4854 /* coding-system (including end-of-line type) */
4856 int eol_flag
= (c
== 'Z');
4857 char *p
= decode_mode_spec_buf
;
4859 if (! FRAME_WINDOW_P (f
))
4861 /* No need to mention EOL here--the terminal never needs
4862 to do EOL conversion. */
4863 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, 0);
4864 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, 0);
4866 p
= decode_mode_spec_coding (b
->buffer_file_coding_system
,
4869 #if 0 /* This proves to be annoying; I think we can do without. -- rms. */
4871 obj
= Fget_buffer_process (Fcurrent_buffer ());
4874 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
4876 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
4879 #endif /* subprocesses */
4882 return decode_mode_spec_buf
;
4887 return (char *) XSTRING (obj
)->data
;
4892 /* Count up to COUNT lines starting from START / START_BYTE.
4893 But don't go beyond LIMIT_BYTE.
4894 Return the number of lines thus found (always nonnegative).
4896 Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */
4899 display_count_lines (start
, start_byte
, limit_byte
, count
, byte_pos_ptr
)
4900 int start
, start_byte
, limit_byte
, count
;
4903 register unsigned char *cursor
;
4904 unsigned char *base
;
4906 register int ceiling
;
4907 register unsigned char *ceiling_addr
;
4908 int orig_count
= count
;
4910 /* If we are not in selective display mode,
4911 check only for newlines. */
4912 int selective_display
= (!NILP (current_buffer
->selective_display
)
4913 && !INTEGERP (current_buffer
->selective_display
));
4917 while (start_byte
< limit_byte
)
4919 ceiling
= BUFFER_CEILING_OF (start_byte
);
4920 ceiling
= min (limit_byte
- 1, ceiling
);
4921 ceiling_addr
= BYTE_POS_ADDR (ceiling
) + 1;
4922 base
= (cursor
= BYTE_POS_ADDR (start_byte
));
4925 if (selective_display
)
4926 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
4929 while (*cursor
!= '\n' && ++cursor
!= ceiling_addr
)
4932 if (cursor
!= ceiling_addr
)
4936 start_byte
+= cursor
- base
+ 1;
4937 *byte_pos_ptr
= start_byte
;
4941 if (++cursor
== ceiling_addr
)
4947 start_byte
+= cursor
- base
;
4952 while (start_byte
> limit_byte
)
4954 ceiling
= BUFFER_FLOOR_OF (start_byte
- 1);
4955 ceiling
= max (limit_byte
, ceiling
);
4956 ceiling_addr
= BYTE_POS_ADDR (ceiling
) - 1;
4957 base
= (cursor
= BYTE_POS_ADDR (start_byte
- 1) + 1);
4960 if (selective_display
)
4961 while (--cursor
!= ceiling_addr
4962 && *cursor
!= '\n' && *cursor
!= 015)
4965 while (--cursor
!= ceiling_addr
&& *cursor
!= '\n')
4968 if (cursor
!= ceiling_addr
)
4972 start_byte
+= cursor
- base
+ 1;
4973 *byte_pos_ptr
= start_byte
;
4974 /* When scanning backwards, we should
4975 not count the newline posterior to which we stop. */
4976 return - orig_count
- 1;
4982 /* Here we add 1 to compensate for the last decrement
4983 of CURSOR, which took it past the valid range. */
4984 start_byte
+= cursor
- base
+ 1;
4988 *byte_pos_ptr
= limit_byte
;
4991 return - orig_count
+ count
;
4992 return orig_count
- count
;
4996 /* Display STRING on one line of window W, starting at HPOS.
4997 Display at position VPOS. Caller should have done get_display_line.
4998 If VPOS == -1, display it as the current frame's title.
4999 LENGTH is the length of STRING, or -1 meaning STRING is null-terminated.
5001 TRUNCATE is GLYPH to display at end if truncated. Zero for none.
5003 MINCOL is the first column ok to end at. (Pad with spaces to this col.)
5004 MAXCOL is the last column ok to end at. Truncate here.
5005 -1 for MINCOL or MAXCOL means no explicit minimum or maximum.
5006 Both count from the left edge of the frame, as does HPOS.
5007 The right edge of W is an implicit maximum.
5008 If TRUNCATE is nonzero, the implicit maximum is one column before the edge.
5010 OBEY_WINDOW_WIDTH says to put spaces or vertical bars
5011 at the place where the current window ends in this line
5012 and not display anything beyond there. Otherwise, only MAXCOL
5013 controls where to stop output.
5015 MULTIBYTE can be 0 meaning do not display multibyte chars,
5016 1 meaning do display them, or -1 meaning obey the current buffer's
5017 value of enable_multibyte_characters.
5019 Returns ending hpos. */
5022 display_string (w
, vpos
, string
, length
, hpos
, truncate
,
5023 obey_window_width
, mincol
, maxcol
, multibyte
)
5025 unsigned char *string
;
5029 int obey_window_width
;
5036 int hscroll
= XINT (w
->hscroll
);
5037 int tab_width
= XINT (XBUFFER (w
->buffer
)->tab_width
);
5038 register GLYPH
*start
;
5039 register GLYPH
*end
;
5040 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
5041 struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
5042 GLYPH
*p1start
= desired_glyphs
->glyphs
[vpos
] + hpos
;
5043 int window_width
= XFASTINT (w
->width
);
5045 /* Use the standard display table, not the window's display table.
5046 We don't want the mode line in rot13. */
5047 register struct Lisp_Char_Table
*dp
= 0;
5050 if (multibyte
== -1)
5051 multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
5052 /* Now multibyte is 1 if we should display multibyte characters. */
5054 if (DISP_TABLE_P (Vstandard_display_table
))
5055 dp
= XCHAR_TABLE (Vstandard_display_table
);
5057 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
5060 start
= desired_glyphs
->glyphs
[vpos
];
5062 if (obey_window_width
)
5064 start
+= XFASTINT (w
->left
);
5065 end
= start
+ window_width
- (truncate
!= 0);
5067 if (!WINDOW_RIGHTMOST_P (w
))
5069 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
5073 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
5076 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
5081 if (! obey_window_width
5082 || (maxcol
>= 0 && end
- desired_glyphs
->glyphs
[vpos
] > maxcol
))
5083 end
= desired_glyphs
->glyphs
[vpos
] + maxcol
;
5085 /* Store 0 in charstart for these columns. */
5086 for (i
= (hpos
>= 0 ? hpos
: 0); i
< end
- p1start
+ hpos
; i
++)
5087 desired_glyphs
->charstarts
[vpos
][i
] = 0;
5089 if (maxcol
>= 0 && mincol
> maxcol
)
5093 /* We need this value for multibyte characters. */
5094 length
= strlen (string
);
5096 /* We set truncated to 1 if we get stopped by trying to pass END
5097 (that is, trying to pass MAXCOL.) */
5106 c
= STRING_CHAR_AND_LENGTH (string
, length
, len
);
5108 c
= *string
, len
= 1;
5110 string
+= len
, length
-= len
;
5118 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
5120 p1
= copy_part_of_rope (f
, p1
, start
,
5121 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
5122 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
5125 else if (c
>= 040 && c
< 0177)
5135 if (p1
>= start
&& p1
< end
)
5139 while ((p1
- start
+ hscroll
- (hscroll
> 0)) % tab_width
);
5141 else if (c
< 0200 && ! NILP (buffer_defaults
.ctl_arrow
))
5145 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
5146 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
5147 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
5150 if (p1
>= start
&& p1
< end
)
5156 /* C is a control character or a binary byte data. */
5159 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
5160 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
5161 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
5164 if (p1
>= start
&& p1
< end
)
5165 *p1
= (c
>> 6) + '0';
5167 if (p1
>= start
&& p1
< end
)
5168 *p1
= (7 & (c
>> 3)) + '0';
5170 if (p1
>= start
&& p1
< end
)
5171 *p1
= (7 & c
) + '0';
5176 /* C is a multibyte character. */
5177 int charset
= CHAR_CHARSET (c
);
5178 int columns
= (charset
== CHARSET_COMPOSITION
5179 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
5180 : CHARSET_WIDTH (charset
));
5184 /* Since we can't show the left part of C, fill all
5185 columns with spaces. */
5186 columns
-= start
- p1
;
5195 else if (p1
+ columns
> end
)
5197 /* Since we can't show the right part of C, fill all
5198 columns with TRUNCATE if TRUNCATE is specified. */
5202 *p1
++ = fix_glyph (f
, truncate
, 0);
5203 /* And tell the line is truncated. */
5210 /* We can show the whole glyph of C. */
5213 *p1
++ = c
| GLYPH_MASK_PADDING
;
5221 if (truncate
) *p1
++ = fix_glyph (f
, truncate
, 0);
5223 else if (mincol
>= 0)
5225 end
= desired_glyphs
->glyphs
[vpos
] + mincol
;
5231 register int len
= p1
- desired_glyphs
->glyphs
[vpos
];
5233 if (len
> desired_glyphs
->used
[vpos
])
5234 desired_glyphs
->used
[vpos
] = len
;
5235 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
5241 /* This is like a combination of memq and assq.
5242 Return 1 if PROPVAL appears as an element of LIST
5243 or as the car of an element of LIST.
5244 If PROPVAL is a list, compare each element against LIST
5245 in that way, and return 1 if any element of PROPVAL is found in LIST.
5247 This function cannot quit. */
5250 invisible_p (propval
, list
)
5251 register Lisp_Object propval
;
5254 register Lisp_Object tail
, proptail
;
5255 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5257 register Lisp_Object tem
;
5258 tem
= XCONS (tail
)->car
;
5259 if (EQ (propval
, tem
))
5261 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5264 if (CONSP (propval
))
5265 for (proptail
= propval
; CONSP (proptail
);
5266 proptail
= XCONS (proptail
)->cdr
)
5268 Lisp_Object propelt
;
5269 propelt
= XCONS (proptail
)->car
;
5270 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5272 register Lisp_Object tem
;
5273 tem
= XCONS (tail
)->car
;
5274 if (EQ (propelt
, tem
))
5276 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5283 /* Return 1 if PROPVAL appears as the car of an element of LIST
5284 and the cdr of that element is non-nil.
5285 If PROPVAL is a list, check each element of PROPVAL in that way,
5286 and the first time some element is found,
5287 return 1 if the cdr of that element is non-nil.
5289 This function cannot quit. */
5292 invisible_ellipsis_p (propval
, list
)
5293 register Lisp_Object propval
;
5296 register Lisp_Object tail
, proptail
;
5297 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5299 register Lisp_Object tem
;
5300 tem
= XCONS (tail
)->car
;
5301 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5302 return ! NILP (XCONS (tem
)->cdr
);
5304 if (CONSP (propval
))
5305 for (proptail
= propval
; CONSP (proptail
);
5306 proptail
= XCONS (proptail
)->cdr
)
5308 Lisp_Object propelt
;
5309 propelt
= XCONS (proptail
)->car
;
5310 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5312 register Lisp_Object tem
;
5313 tem
= XCONS (tail
)->car
;
5314 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5315 return ! NILP (XCONS (tem
)->cdr
);
5324 staticpro (&Qmenu_bar_update_hook
);
5325 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
5327 staticpro (&Qoverriding_terminal_local_map
);
5328 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
5330 staticpro (&Qoverriding_local_map
);
5331 Qoverriding_local_map
= intern ("overriding-local-map");
5333 staticpro (&Qwindow_scroll_functions
);
5334 Qwindow_scroll_functions
= intern ("window-scroll-functions");
5336 staticpro (&Qredisplay_end_trigger_functions
);
5337 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
5339 staticpro (&last_arrow_position
);
5340 staticpro (&last_arrow_string
);
5341 last_arrow_position
= Qnil
;
5342 last_arrow_string
= Qnil
;
5344 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
5345 "String (or mode line construct) included (normally) in `mode-line-format'.");
5346 Vglobal_mode_string
= Qnil
;
5348 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
5349 "Marker for where to display an arrow on top of the buffer text.\n\
5350 This must be the beginning of a line in order to work.\n\
5351 See also `overlay-arrow-string'.");
5352 Voverlay_arrow_position
= Qnil
;
5354 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
5355 "String to display as an arrow. See also `overlay-arrow-position'.");
5356 Voverlay_arrow_string
= Qnil
;
5358 DEFVAR_INT ("scroll-step", &scroll_step
,
5359 "*The number of lines to try scrolling a window by when point moves out.\n\
5360 If that fails to bring point back on frame, point is centered instead.\n\
5361 If this is zero, point is always centered after it moves off frame.");
5363 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
5364 "*Scroll up to this many lines, to bring point back on screen.");
5365 scroll_conservatively
= 0;
5367 DEFVAR_INT ("scroll-margin", &scroll_margin
,
5368 "*Number of lines of margin at the top and bottom of a window.\n\
5369 Recenter the window whenever point gets within this many lines\n\
5370 of the top or bottom of the window.");
5373 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
5375 DEFVAR_BOOL ("truncate-partial-width-windows",
5376 &truncate_partial_width_windows
,
5377 "*Non-nil means truncate lines in all windows less than full frame wide.");
5378 truncate_partial_width_windows
= 1;
5380 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
5381 "*Non-nil means use inverse video for the mode line.");
5382 mode_line_inverse_video
= 1;
5384 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
5385 "*Maximum buffer size (in characters) for line number display\n\
5386 If the buffer is bigger than this, the line number does not appear\n\
5387 in the mode line..");
5388 line_number_display_limit
= 1000000;
5390 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
5391 "*Non-nil means highlight region even in nonselected windows.");
5392 highlight_nonselected_windows
= 0;
5394 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
5395 "Non-nil if more than one frame is visible on this display.\n\
5396 Minibuffer-only frames don't count, but iconified frames do.\n\
5397 This variable is not guaranteed to be accurate except while processing\n\
5398 `frame-title-format' and `icon-title-format'.");
5400 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
5401 "Template for displaying the titlebar of visible frames.\n\
5402 \(Assuming the window manager supports this feature.)\n\
5403 This variable has the same structure as `mode-line-format' (which see),\n\
5404 and is used only on frames for which no explicit name has been set\n\
5405 \(see `modify-frame-parameters').");
5406 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
5407 "Template for displaying the titlebar of an iconified frame.\n\
5408 \(Assuming the window manager supports this feature.)\n\
5409 This variable has the same structure as `mode-line-format' (which see),\n\
5410 and is used only on frames for which no explicit name has been set\n\
5411 \(see `modify-frame-parameters').");
5413 = Vframe_title_format
5414 = Fcons (intern ("multiple-frames"),
5415 Fcons (build_string ("%b"),
5416 Fcons (Fcons (build_string (""),
5417 Fcons (intern ("invocation-name"),
5418 Fcons (build_string ("@"),
5419 Fcons (intern ("system-name"),
5423 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
5424 "Maximum number of lines to keep in the message log buffer.\n\
5425 If nil, disable message logging. If t, log messages but don't truncate\n\
5426 the buffer when it becomes large.");
5427 XSETFASTINT (Vmessage_log_max
, 50);
5429 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
5430 "Functions called before redisplay, if window sizes have changed.\n\
5431 The value should be a list of functions that take one argument.\n\
5432 Just before redisplay, for each frame, if any of its windows have changed\n\
5433 size since the last redisplay, or have been split or deleted,\n\
5434 all the functions in the list are called, with the frame as argument.");
5435 Vwindow_size_change_functions
= Qnil
;
5437 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
5438 "List of functions to call before redisplaying a window with scrolling.\n\
5439 Each function is called with two arguments, the window\n\
5440 and its new display-start position. Note that the value of `window-end'\n\
5441 is not valid when these functions are called.");
5442 Vwindow_scroll_functions
= Qnil
;
5444 DEFVAR_INT ("minibuffer-scroll-overlap", &minibuffer_scroll_overlap
,
5445 "*Number of characters of overlap when scrolling a one-line window.\n\
5446 This commonly affects the minibuffer window, hence the name of the variable.");
5447 minibuffer_scroll_overlap
= 20;
5450 /* initialize the window system */
5453 Lisp_Object root_window
;
5454 #ifndef COMPILER_REGISTER_BUG
5456 #endif /* COMPILER_REGISTER_BUG */
5457 struct window
*mini_w
;
5459 this_line_bufpos
= 0;
5461 mini_w
= XWINDOW (minibuf_window
);
5462 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
5464 echo_area_glyphs
= 0;
5465 previous_echo_glyphs
= 0;
5467 if (!noninteractive
)
5469 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
5470 XSETFASTINT (XWINDOW (root_window
)->top
, FRAME_MENU_BAR_LINES (f
));
5471 set_window_height (root_window
,
5472 FRAME_HEIGHT (f
) - 1 - FRAME_MENU_BAR_LINES (f
),
5474 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
5475 set_window_height (minibuf_window
, 1, 0);
5477 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
5478 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));