1 /* Display generation from window structure and buffer text.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 97, 1998
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 /*#include <ctype.h>*/
31 #include "dispextern.h"
38 #include "termhooks.h"
39 #include "intervals.h"
43 #include "region-cache.h"
49 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
50 extern void set_frame_menubar ();
51 extern int pending_menu_activation
;
54 extern int interrupt_input
;
55 extern int command_loop_level
;
57 extern int minibuffer_auto_raise
;
59 extern Lisp_Object Qface
;
61 extern Lisp_Object Voverriding_local_map
;
62 extern Lisp_Object Voverriding_local_map_menu_flag
;
64 Lisp_Object Qoverriding_local_map
, Qoverriding_terminal_local_map
;
65 Lisp_Object Qwindow_scroll_functions
, Vwindow_scroll_functions
;
66 Lisp_Object Qredisplay_end_trigger_functions
;
67 Lisp_Object Qinhibit_point_motion_hooks
;
69 /* Non-nil means don't actually do any redisplay. */
71 Lisp_Object Vinhibit_redisplay
, Qinhibit_redisplay
;
73 /* Nonzero means print newline to stdout before next minibuffer message. */
75 int noninteractive_need_newline
;
77 /* Nonzero means print newline to message log before next message. */
79 static int message_log_need_newline
;
81 #define min(a, b) ((a) < (b) ? (a) : (b))
82 #define max(a, b) ((a) > (b) ? (a) : (b))
83 #define minmax(floor, val, ceil) \
84 ((val) < (floor) ? (floor) : (val) > (ceil) ? (ceil) : (val))
86 /* The buffer position of the first character appearing
87 entirely or partially on the current frame line.
88 Or zero, which disables the optimization for the current frame line. */
89 static int this_line_bufpos
;
91 /* Number of characters past the end of this line,
92 including the terminating newline */
93 static int this_line_endpos
;
95 /* The vertical position of this frame line. */
96 static int this_line_vpos
;
98 /* Hpos value for start of display on this frame line.
99 Usually zero, but negative if first character really began
101 static int this_line_start_hpos
;
103 /* Buffer that this_line variables are describing. */
104 static struct buffer
*this_line_buffer
;
106 /* Value of echo_area_glyphs when it was last acted on.
107 If this is nonzero, there is a message on the frame
108 in the minibuffer and it should be erased as soon
109 as it is no longer requested to appear. */
110 char *previous_echo_glyphs
;
112 /* Nonzero means truncate lines in all windows less wide than the frame */
113 int truncate_partial_width_windows
;
115 /* Nonzero means we have more than one non-minibuffer-only frame.
116 Not guaranteed to be accurate except while parsing frame-title-format. */
119 Lisp_Object Vglobal_mode_string
;
121 /* Marker for where to display an arrow on top of the buffer text. */
122 Lisp_Object Voverlay_arrow_position
;
124 /* String to display for the arrow. */
125 Lisp_Object Voverlay_arrow_string
;
127 /* Values of those variables at last redisplay.
128 However, if Voverlay_arrow_position is a marker,
129 last_arrow_position is its numerical position. */
130 static Lisp_Object last_arrow_position
, last_arrow_string
;
132 /* Like mode-line-format, but for the titlebar on a visible frame. */
133 Lisp_Object Vframe_title_format
;
135 /* Like mode-line-format, but for the titlebar on an iconified frame. */
136 Lisp_Object Vicon_title_format
;
138 /* List of functions to call when a window's size changes. These
139 functions get one arg, a frame on which one or more windows' sizes
141 static Lisp_Object Vwindow_size_change_functions
;
143 Lisp_Object Qmenu_bar_update_hook
;
145 /* Nonzero if overlay arrow has been displayed once in this window. */
146 static int overlay_arrow_seen
;
148 /* Nonzero if visible end of buffer has already been displayed once
149 in this window. (We need this variable in case there are overlay
150 strings that get displayed there.) */
151 static int zv_strings_seen
;
153 /* Nonzero means highlight the region even in nonselected windows. */
154 static int highlight_nonselected_windows
;
156 /* If cursor motion alone moves point off frame,
157 Try scrolling this many lines up or down if that will bring it back. */
158 static int scroll_step
;
160 /* Non-0 means scroll just far enough to bring point back on the screen,
162 static int scroll_conservatively
;
164 /* Recenter the window whenever point gets within this many lines
165 of the top or bottom of the window. */
168 /* Number of characters of overlap to show,
169 when scrolling a one-line window such as a minibuffer. */
170 static int minibuffer_scroll_overlap
;
172 /* Nonzero if try_window_id has made blank lines at window bottom
173 since the last redisplay that paused */
174 static int blank_end_of_window
;
176 /* Number of windows showing the buffer of the selected window
177 (or another buffer with the same base buffer).
178 keyboard.c refers to this. */
181 /* display_text_line sets these to the frame position (origin 0) of point,
182 whether the window is selected or not.
183 Set one to -1 first to determine whether point was found afterwards. */
185 static int cursor_vpos
;
186 static int cursor_hpos
;
188 static int debug_end_pos
;
190 /* Nonzero means display mode line highlighted */
191 int mode_line_inverse_video
;
193 static void redisplay_internal ();
194 static int message_log_check_duplicate ();
195 static void echo_area_display ();
196 void mark_window_display_accurate ();
197 static void redisplay_windows ();
198 static void redisplay_window ();
199 static void update_menu_bar ();
200 static void try_window ();
201 static int try_window_id ();
202 static struct position
*display_text_line ();
203 static void display_mode_line ();
204 static int display_mode_element ();
205 static char *decode_mode_spec ();
206 static int display_string ();
207 static void display_menu_bar ();
208 static int display_count_lines ();
210 /* Prompt to display in front of the minibuffer contents */
211 Lisp_Object minibuf_prompt
;
213 /* Width in columns of current minibuffer prompt. */
214 int minibuf_prompt_width
;
216 /* Message to display instead of minibuffer contents
217 This is what the functions error and message make,
218 and command echoing uses it as well.
219 It overrides the minibuf_prompt as well as the buffer. */
220 char *echo_area_glyphs
;
222 /* This is the length of the message in echo_area_glyphs. */
223 int echo_area_glyphs_length
;
225 /* This is the window where the echo area message was displayed.
226 It is always a minibuffer window, but it may not be the
227 same window currently active as a minibuffer. */
228 Lisp_Object echo_area_window
;
230 /* Nonzero means multibyte characters were enabled when the echo area
231 message was specified. */
232 int message_enable_multibyte
;
234 /* true iff we should redraw the mode lines on the next redisplay */
235 int update_mode_lines
;
237 /* Smallest number of characters before the gap
238 at any time since last redisplay that finished.
239 Valid for current buffer when try_window_id can be called. */
242 /* Smallest number of characters after the gap
243 at any time since last redisplay that finished.
244 Valid for current buffer when try_window_id can be called. */
247 /* MODIFF as of last redisplay that finished;
248 if it matches MODIFF, and overlay_unchanged_modified
249 matches OVERLAY_MODIFF, that means beg_unchanged and end_unchanged
250 contain no useful information */
251 int unchanged_modified
;
253 /* OVERLAY_MODIFF as of last redisplay that finished. */
254 int overlay_unchanged_modified
;
256 /* Nonzero if window sizes or contents have changed
257 since last redisplay that finished */
258 int windows_or_buffers_changed
;
260 /* Nonzero after display_mode_line if %l was used
261 and it displayed a line number. */
262 int line_number_displayed
;
264 /* Maximum buffer size for which to display line numbers. */
265 static int line_number_display_limit
;
267 /* Number of lines to keep in the message log buffer.
268 t means infinite. nil means don't log at all. */
269 Lisp_Object Vmessage_log_max
;
271 #define COERCE_MARKER(X) \
272 (MARKERP ((X)) ? Fmarker_position (X) : (X))
274 static int pos_tab_offset
P_ ((struct window
*, int, int));
276 /* Output a newline in the *Messages* buffer if "needs" one. */
279 message_log_maybe_newline ()
281 if (message_log_need_newline
)
282 message_dolog ("", 0, 1, 0);
286 /* Add a string to the message log, optionally terminated with a newline.
287 This function calls low-level routines in order to bypass text property
288 hooks, etc. which might not be safe to run.
289 MULTIBYTE, if nonzero, means interpret the contents of M as multibyte. */
292 message_dolog (m
, len
, nlflag
, multibyte
)
294 int len
, nlflag
, multibyte
;
296 if (!NILP (Vmessage_log_max
))
298 struct buffer
*oldbuf
;
299 Lisp_Object oldpoint
, oldbegv
, oldzv
;
300 int old_windows_or_buffers_changed
= windows_or_buffers_changed
;
301 int point_at_end
= 0;
303 Lisp_Object old_deactivate_mark
, tem
;
304 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
306 old_deactivate_mark
= Vdeactivate_mark
;
307 oldbuf
= current_buffer
;
308 Fset_buffer (Fget_buffer_create (build_string ("*Messages*")));
309 current_buffer
->undo_list
= Qt
;
311 oldpoint
= Fpoint_marker ();
312 oldbegv
= Fpoint_min_marker ();
313 oldzv
= Fpoint_max_marker ();
314 GCPRO4 (oldpoint
, oldbegv
, oldzv
, old_deactivate_mark
);
322 BEGV_BYTE
= BEG_BYTE
;
325 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
327 /* Insert the string--maybe converting multibyte to single byte
328 or vice versa, so that all the text fits the buffer. */
330 && NILP (current_buffer
->enable_multibyte_characters
))
332 int c
, i
= 0, nbytes
;
333 /* Convert a multibyte string to single-byte
334 for the *Message* buffer. */
337 c
= STRING_CHAR (m
+ i
, len
- i
);
339 /* Truncate the character to its last byte--we can only hope
340 the user is happy with the character he gets,
341 since if it isn't right, there is no way to do it right. */
347 && ! NILP (current_buffer
->enable_multibyte_characters
))
350 unsigned char *msg
= (unsigned char *) m
;
351 /* Convert a single-byte string to multibyte
352 for the *Message* buffer. */
355 int c
= unibyte_char_to_multibyte (msg
[i
++]);
360 insert_1 (m
, len
, 1, 0, 0);
364 int this_bol
, this_bol_byte
, prev_bol
, prev_bol_byte
, dup
;
365 insert_1 ("\n", 1, 1, 0, 0);
367 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
, -2, 0);
369 this_bol_byte
= PT_BYTE
;
373 scan_newline (PT
, PT_BYTE
, BEG
, BEG_BYTE
, -2, 0);
375 prev_bol_byte
= PT_BYTE
;
377 dup
= message_log_check_duplicate (prev_bol
, prev_bol_byte
,
378 this_bol
, this_bol_byte
);
381 del_range_both (prev_bol
, prev_bol_byte
,
382 this_bol
, this_bol_byte
, 0);
388 /* If you change this format, don't forget to also
389 change message_log_check_duplicate. */
390 sprintf (dupstr
, " [%d times]", dup
);
391 duplen
= strlen (dupstr
);
392 TEMP_SET_PT_BOTH (Z
- 1, Z_BYTE
- 1);
393 insert_1 (dupstr
, duplen
, 1, 0, 1);
398 if (NATNUMP (Vmessage_log_max
))
400 scan_newline (Z
, Z_BYTE
, BEG
, BEG_BYTE
,
401 -XFASTINT (Vmessage_log_max
) - 1, 0);
402 del_range_both (BEG
, BEG_BYTE
, PT
, PT_BYTE
, 0);
405 BEGV
= XMARKER (oldbegv
)->charpos
;
406 BEGV_BYTE
= marker_byte_position (oldbegv
);
415 ZV
= XMARKER (oldzv
)->charpos
;
416 ZV_BYTE
= marker_byte_position (oldzv
);
420 TEMP_SET_PT_BOTH (Z
, Z_BYTE
);
422 Fgoto_char (oldpoint
);
425 free_marker (oldpoint
);
426 free_marker (oldbegv
);
429 tem
= Fget_buffer_window (Fcurrent_buffer (), Qt
);
430 set_buffer_internal (oldbuf
);
432 windows_or_buffers_changed
= old_windows_or_buffers_changed
;
433 message_log_need_newline
= !nlflag
;
434 Vdeactivate_mark
= old_deactivate_mark
;
438 /* We are at the end of the buffer after just having inserted a newline.
439 (Note: We depend on the fact we won't be crossing the gap.)
440 Check to see if the most recent message looks a lot like the previous one.
441 Return 0 if different, 1 if the new one should just replace it, or a
442 value N > 1 if we should also append " [N times]". */
445 message_log_check_duplicate (prev_bol
, prev_bol_byte
, this_bol
, this_bol_byte
)
446 int prev_bol
, this_bol
;
447 int prev_bol_byte
, this_bol_byte
;
450 int len
= Z
- 1 - this_bol
;
452 unsigned char *p1
= BUF_BYTE_ADDRESS (current_buffer
, prev_bol_byte
);
453 unsigned char *p2
= BUF_BYTE_ADDRESS (current_buffer
, this_bol_byte
);
455 for (i
= 0; i
< len
; i
++)
457 if (i
>= 3 && p1
[i
-3] == '.' && p1
[i
-2] == '.' && p1
[i
-1] == '.'
466 if (*p1
++ == ' ' && *p1
++ == '[')
469 while (*p1
>= '0' && *p1
<= '9')
470 n
= n
* 10 + *p1
++ - '0';
471 if (strncmp (p1
, " times]\n", 8) == 0)
477 /* Display an echo area message M with a specified length of LEN chars.
478 The string may include null characters. If M is 0, clear out any
479 existing message, and let the minibuffer text show through.
481 The buffer M must continue to exist until after the echo area
482 gets cleared or some other message gets displayed there.
484 Do not pass text that is stored in a Lisp string.
485 Do not pass text in a buffer that was alloca'd. */
488 message2 (m
, len
, multibyte
)
493 /* First flush out any partial line written with print. */
494 message_log_maybe_newline ();
496 message_dolog (m
, len
, 1, multibyte
);
497 message2_nolog (m
, len
, multibyte
);
501 /* The non-logging counterpart of message2. */
504 message2_nolog (m
, len
, multibyte
)
508 message_enable_multibyte
= multibyte
;
512 if (noninteractive_need_newline
)
514 noninteractive_need_newline
= 0;
516 fwrite (m
, len
, 1, stderr
);
517 if (cursor_in_echo_area
== 0)
518 fprintf (stderr
, "\n");
521 /* A null message buffer means that the frame hasn't really been
522 initialized yet. Error messages get reported properly by
523 cmd_error, so this must be just an informative message; toss it. */
524 else if (INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
526 Lisp_Object mini_window
;
529 /* Get the frame containing the minibuffer
530 that the selected frame is using. */
531 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
532 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
534 FRAME_SAMPLE_VISIBILITY (f
);
535 if (FRAME_VISIBLE_P (selected_frame
)
536 && ! FRAME_VISIBLE_P (f
))
537 Fmake_frame_visible (WINDOW_FRAME (XWINDOW (mini_window
)));
541 echo_area_glyphs
= m
;
542 echo_area_glyphs_length
= len
;
544 if (minibuffer_auto_raise
)
545 Fraise_frame (WINDOW_FRAME (XWINDOW (mini_window
)));
548 echo_area_glyphs
= previous_echo_glyphs
= 0;
550 do_pending_window_change ();
551 echo_area_display ();
552 update_frame (f
, 1, 1);
553 do_pending_window_change ();
554 if (frame_up_to_date_hook
!= 0 && ! gc_in_progress
)
555 (*frame_up_to_date_hook
) (f
);
559 /* Display in echo area the null-terminated ASCII-only string M.
560 If M is 0, clear out any existing message,
561 and let the minibuffer text show through.
563 The string M must continue to exist until after the echo area
564 gets cleared or some other message gets displayed there.
566 Do not pass text that is stored in a Lisp string.
567 Do not pass text in a buffer that was alloca'd. */
573 message2 (m
, (m
? strlen (m
) : 0), 0);
580 message2_nolog (m
, (m
? strlen (m
) : 0), 0);
583 /* Display a message M which contains a single %s
584 which gets replaced with STRING. */
587 message_with_string (m
, string
, log
)
596 if (noninteractive_need_newline
)
598 noninteractive_need_newline
= 0;
599 fprintf (stderr
, m
, XSTRING (string
)->data
);
600 if (cursor_in_echo_area
== 0)
601 fprintf (stderr
, "\n");
605 else if (INTERACTIVE
)
607 /* The frame whose minibuffer we're going to display the message on.
608 It may be larger than the selected frame, so we need
609 to use its buffer, not the selected frame's buffer. */
610 Lisp_Object mini_window
;
613 /* Get the frame containing the minibuffer
614 that the selected frame is using. */
615 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
616 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
618 /* A null message buffer means that the frame hasn't really been
619 initialized yet. Error messages get reported properly by
620 cmd_error, so this must be just an informative message; toss it. */
621 if (FRAME_MESSAGE_BUF (f
))
625 a
[0] = (char *) XSTRING (string
)->data
;
627 len
= doprnt (FRAME_MESSAGE_BUF (f
),
628 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
631 message2 (FRAME_MESSAGE_BUF (f
), len
,
632 STRING_MULTIBYTE (string
));
634 message2_nolog (FRAME_MESSAGE_BUF (f
), len
,
635 STRING_MULTIBYTE (string
));
637 /* Print should start at the beginning of the message
639 message_buf_print
= 0;
644 /* Truncate what will be displayed in the echo area
645 the next time we display it--but don't redisplay it now. */
648 truncate_echo_area (len
)
651 /* A null message buffer means that the frame hasn't really been
652 initialized yet. Error messages get reported properly by
653 cmd_error, so this must be just an informative message; toss it. */
654 if (!noninteractive
&& INTERACTIVE
&& FRAME_MESSAGE_BUF (selected_frame
))
655 echo_area_glyphs_length
= len
;
658 /* Nonzero if FRAME_MESSAGE_BUF (selected_frame) is being used by print;
659 zero if being used by message. */
660 int message_buf_print
;
662 /* Dump an informative message to the minibuf. If M is 0, clear out
663 any existing message, and let the minibuffer text show through. */
667 message (m
, a1
, a2
, a3
)
669 EMACS_INT a1
, a2
, a3
;
675 if (noninteractive_need_newline
)
677 noninteractive_need_newline
= 0;
678 fprintf (stderr
, m
, a1
, a2
, a3
);
679 if (cursor_in_echo_area
== 0)
680 fprintf (stderr
, "\n");
684 else if (INTERACTIVE
)
686 /* The frame whose minibuffer we're going to display the message on.
687 It may be larger than the selected frame, so we need
688 to use its buffer, not the selected frame's buffer. */
689 Lisp_Object mini_window
;
692 /* Get the frame containing the minibuffer
693 that the selected frame is using. */
694 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
695 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
697 /* A null message buffer means that the frame hasn't really been
698 initialized yet. Error messages get reported properly by
699 cmd_error, so this must be just an informative message; toss it. */
700 if (FRAME_MESSAGE_BUF (f
))
711 len
= doprnt (FRAME_MESSAGE_BUF (f
),
712 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3, a
);
714 len
= doprnt (FRAME_MESSAGE_BUF (f
),
715 FRAME_MESSAGE_BUF_SIZE (f
), m
, (char *)0, 3,
717 #endif /* NO_ARG_ARRAY */
719 message2 (FRAME_MESSAGE_BUF (f
), len
, 0);
724 /* Print should start at the beginning of the message
726 message_buf_print
= 0;
731 /* The non-logging version of message. */
733 message_nolog (m
, a1
, a2
, a3
)
735 EMACS_INT a1
, a2
, a3
;
737 Lisp_Object old_log_max
;
738 old_log_max
= Vmessage_log_max
;
739 Vmessage_log_max
= Qnil
;
740 message (m
, a1
, a2
, a3
);
741 Vmessage_log_max
= old_log_max
;
747 message2 (echo_area_glyphs
, echo_area_glyphs_length
,
748 ! NILP (current_buffer
->enable_multibyte_characters
));
756 Lisp_Object mini_window
;
758 /* Choose the minibuffer window for this display.
759 It is the minibuffer window used by the selected frame. */
760 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
761 /* This is the frame that window is in. */
762 f
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
764 if (! FRAME_VISIBLE_P (f
))
769 redraw_garbaged_frames ();
773 if (echo_area_glyphs
|| minibuf_level
== 0)
777 echo_area_window
= mini_window
;
779 vpos
= XFASTINT (XWINDOW (mini_window
)->top
);
780 get_display_line (f
, vpos
, 0);
782 /* Make sure the columns that overlap a left-hand scroll bar
784 for (i
= 0; i
< FRAME_LEFT_SCROLL_BAR_WIDTH (f
); i
++)
785 f
->desired_glyphs
->glyphs
[vpos
][i
] = SPACEGLYPH
;
787 display_string (XWINDOW (mini_window
), vpos
,
788 echo_area_glyphs
? echo_area_glyphs
: "",
789 echo_area_glyphs
? echo_area_glyphs_length
: -1,
790 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
792 FRAME_WIDTH (f
) + FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
793 message_enable_multibyte
);
795 #if 0 /* This just gets in the way. update_frame does the job. */
796 /* If desired cursor location is on this line, put it at end of text */
797 if (cursor_in_echo_area
)
798 FRAME_CURSOR_Y (f
) = vpos
;
799 if (FRAME_CURSOR_Y (f
) == vpos
)
800 FRAME_CURSOR_X (f
) = FRAME_DESIRED_GLYPHS (f
)->used
[vpos
];
803 /* Fill the rest of the minibuffer window with blank lines. */
808 i
< vpos
+ XFASTINT (XWINDOW (mini_window
)->height
); i
++)
810 get_display_line (f
, i
, 0);
811 /* We don't use FRAME_SCROLL_BAR_WIDTH (f) as the starting
812 hpos, because it is good to clear whatever is behind the
813 scroll bar. This does not affect the scroll bar itself. */
814 display_string (XWINDOW (mini_window
), i
,
817 0, FRAME_WIDTH (f
) + FRAME_SCROLL_BAR_WIDTH (f
),
822 else if (!EQ (mini_window
, selected_window
))
823 windows_or_buffers_changed
++;
825 if (EQ (mini_window
, selected_window
))
826 this_line_bufpos
= 0;
828 previous_echo_glyphs
= echo_area_glyphs
;
831 /* Update frame titles. */
833 #ifdef HAVE_WINDOW_SYSTEM
834 static char frame_title_buf
[512];
835 static char *frame_title_ptr
;
838 store_frame_title (str
, mincol
, maxcol
)
843 if (maxcol
< 0 || maxcol
>= sizeof(frame_title_buf
))
844 maxcol
= sizeof (frame_title_buf
);
845 limit
= &frame_title_buf
[maxcol
];
846 while (*str
!= '\0' && frame_title_ptr
< limit
)
847 *frame_title_ptr
++ = *str
++;
848 while (frame_title_ptr
< &frame_title_buf
[mincol
])
849 *frame_title_ptr
++ = ' ';
850 return frame_title_ptr
- frame_title_buf
;
854 x_consider_frame_title (frame
)
860 FRAME_PTR f
= XFRAME (frame
);
862 if (!(FRAME_WINDOW_P (f
) || FRAME_MINIBUF_ONLY_P (f
) || f
->explicit_name
))
865 /* Do we have more than one visible frame on this X display? */
869 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
871 FRAME_PTR tf
= XFRAME (XCONS (tail
)->car
);
873 if (tf
!= f
&& FRAME_KBOARD (tf
) == FRAME_KBOARD (f
)
874 && !FRAME_MINIBUF_ONLY_P (tf
)
875 && (FRAME_VISIBLE_P (tf
) || FRAME_ICONIFIED_P (tf
)))
879 multiple_frames
= CONSP (tail
);
882 obuf
= current_buffer
;
883 Fset_buffer (XWINDOW (f
->selected_window
)->buffer
);
884 fmt
= (FRAME_ICONIFIED_P (f
) ? Vicon_title_format
: Vframe_title_format
);
885 frame_title_ptr
= frame_title_buf
;
886 len
= display_mode_element (XWINDOW (f
->selected_window
), 0, 0, 0,
887 0, sizeof (frame_title_buf
), fmt
);
889 set_buffer_internal (obuf
);
890 /* Set the name only if it's changed. This avoids consing
891 in the common case where it hasn't. (If it turns out that we've
892 already wasted too much time by walking through the list with
893 display_mode_element, then we might need to optimize at a higher
895 if (! STRINGP (f
->name
) || STRING_BYTES (XSTRING (f
->name
)) != len
896 || bcmp (frame_title_buf
, XSTRING (f
->name
)->data
, len
) != 0)
897 x_implicitly_set_name (f
, make_string (frame_title_buf
, len
), Qnil
);
900 #define frame_title_ptr ((char *)0)
901 #define store_frame_title(str, mincol, maxcol) 0
904 /* Prepare for redisplay by updating menu-bar item lists when appropriate.
905 This can call eval. */
910 register struct window
*w
= XWINDOW (selected_window
);
912 struct gcpro gcpro1
, gcpro2
;
914 all_windows
= (update_mode_lines
|| buffer_shared
> 1
915 || windows_or_buffers_changed
);
917 /* Update all frame titles based on their buffer names, etc.
918 We do this before the menu bars so that the buffer-menu
919 will show the up-to-date frame titles.
921 This used to be done after the menu bars, for a reason that
922 was stated as follows but which I do not understand:
923 "We do this after the menu bars so that the frame will first
924 create its menu bar using the name `emacs' if no other name
925 has yet been specified."
926 I think that is no longer a concern. */
927 #ifdef HAVE_WINDOW_SYSTEM
928 if (windows_or_buffers_changed
|| update_mode_lines
)
930 Lisp_Object tail
, frame
;
932 FOR_EACH_FRAME (tail
, frame
)
933 if (FRAME_VISIBLE_P (XFRAME (frame
))
934 || FRAME_ICONIFIED_P (XFRAME (frame
)))
935 x_consider_frame_title (frame
);
939 /* Update the menu bar item lists, if appropriate.
940 This has to be done before any actual redisplay
941 or generation of display lines. */
944 Lisp_Object tail
, frame
;
945 int count
= specpdl_ptr
- specpdl
;
947 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
949 FOR_EACH_FRAME (tail
, frame
)
951 /* If a window on this frame changed size,
952 report that to the user and clear the size-change flag. */
953 if (FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)))
955 Lisp_Object functions
;
956 /* Clear flag first in case we get error below. */
957 FRAME_WINDOW_SIZES_CHANGED (XFRAME (frame
)) = 0;
958 functions
= Vwindow_size_change_functions
;
959 GCPRO2 (tail
, functions
);
960 while (CONSP (functions
))
962 call1 (XCONS (functions
)->car
, frame
);
963 functions
= XCONS (functions
)->cdr
;
968 update_menu_bar (XFRAME (frame
), 0);
972 unbind_to (count
, Qnil
);
975 update_menu_bar (selected_frame
, 1);
977 /* Motif needs this. See comment in xmenu.c.
978 Turn it off when pending_menu_activation is not defined. */
980 pending_menu_activation
= 0;
984 /* Do a frame update, taking possible shortcuts into account.
985 This is the main external entry point for redisplay.
987 If the last redisplay displayed an echo area message and that
988 message is no longer requested, we clear the echo area
989 or bring back the minibuffer if that is in use.
991 Do not call eval from within this function.
992 Calls to eval after the call to echo_area_display would confuse
993 the display_line mechanism and would cause a crash.
994 Calls to eval before that point will work most of the time,
995 but can still lose, because this function
996 can be called from signal handlers; with alarms set up;
997 or with synchronous processes running.
999 See Fcall_process; if you called it from here, it could be
1000 entered recursively. */
1002 static int do_verify_charstarts
;
1004 /* Counter is used to clear the face cache
1005 no more than once ever 1000 redisplays. */
1006 static int clear_face_cache_count
;
1008 /* Record the previous terminal frame we displayed. */
1009 static FRAME_PTR previous_terminal_frame
;
1014 redisplay_internal (0);
1017 /* If PRESERVE_ECHO_AREA is nonzero, it means this redisplay
1018 is not in response to any user action; therefore, we should
1019 preserve the echo area. (Actually, our caller does that job.)
1020 Perhaps in the future avoid recentering windows
1021 if it is not necessary; currently that causes some problems. */
1024 redisplay_internal (preserve_echo_area
)
1025 int preserve_echo_area
;
1027 register struct window
*w
= XWINDOW (selected_window
);
1029 int must_finish
= 0;
1031 register int tlbufpos
, tlendpos
;
1032 struct position pos
;
1033 int number_of_visible_frames
;
1038 #ifdef USE_X_TOOLKIT
1039 if (popup_activated ())
1043 if (! NILP (Vinhibit_redisplay
))
1048 if (! FRAME_WINDOW_P (selected_frame
)
1049 && previous_terminal_frame
!= selected_frame
)
1051 /* Since frames on an ASCII terminal share the same display area,
1052 displaying a different frame means redisplay the whole thing. */
1053 windows_or_buffers_changed
++;
1054 SET_FRAME_GARBAGED (selected_frame
);
1055 XSETFRAME (Vterminal_frame
, selected_frame
);
1057 previous_terminal_frame
= selected_frame
;
1059 /* Set the visible flags for all frames.
1060 Do this before checking for resized or garbaged frames; they want
1061 to know if their frames are visible.
1062 See the comment in frame.h for FRAME_SAMPLE_VISIBILITY. */
1064 Lisp_Object tail
, frame
;
1066 number_of_visible_frames
= 0;
1068 FOR_EACH_FRAME (tail
, frame
)
1070 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1072 if (FRAME_VISIBLE_P (XFRAME (frame
)))
1073 number_of_visible_frames
++;
1075 /* Clear out all the display lines in which we will generate the
1076 glyphs to display. */
1077 init_desired_glyphs (XFRAME (frame
));
1081 /* Notice any pending interrupt request to change frame size. */
1082 do_pending_window_change ();
1086 redraw_garbaged_frames ();
1090 prepare_menu_bars ();
1092 if (windows_or_buffers_changed
)
1093 update_mode_lines
++;
1095 /* Detect case that we need to write or remove a star in the mode line. */
1096 if ((SAVE_MODIFF
< MODIFF
) != !NILP (w
->last_had_star
))
1098 w
->update_mode_line
= Qt
;
1099 if (buffer_shared
> 1)
1100 update_mode_lines
++;
1103 /* If %c is in use, update it if needed. */
1104 if (!NILP (w
->column_number_displayed
)
1105 /* This alternative quickly identifies a common case
1106 where no change is needed. */
1107 && !(PT
== XFASTINT (w
->last_point
)
1108 && XFASTINT (w
->last_modified
) >= MODIFF
1109 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1110 && XFASTINT (w
->column_number_displayed
) != current_column ())
1111 w
->update_mode_line
= Qt
;
1113 FRAME_SCROLL_BOTTOM_VPOS (XFRAME (w
->frame
)) = -1;
1115 all_windows
= update_mode_lines
|| buffer_shared
> 1;
1117 /* If specs for an arrow have changed, do thorough redisplay
1118 to ensure we remove any arrow that should no longer exist. */
1119 if (! EQ (COERCE_MARKER (Voverlay_arrow_position
), last_arrow_position
)
1120 || ! EQ (Voverlay_arrow_string
, last_arrow_string
))
1123 /* Normally the message* functions will have already displayed and
1124 updated the echo area, but the frame may have been trashed, or
1125 the update may have been preempted, so display the echo area
1127 if (echo_area_glyphs
|| previous_echo_glyphs
)
1129 echo_area_display ();
1133 /* If showing region, and mark has changed, must redisplay whole window. */
1134 if (((!NILP (Vtransient_mark_mode
)
1135 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1136 != !NILP (w
->region_showing
))
1137 || (!NILP (w
->region_showing
)
1138 && !EQ (w
->region_showing
,
1139 Fmarker_position (XBUFFER (w
->buffer
)->mark
))))
1140 this_line_bufpos
= -1;
1142 tlbufpos
= this_line_bufpos
;
1143 tlendpos
= this_line_endpos
;
1144 if (!all_windows
&& tlbufpos
> 0 && NILP (w
->update_mode_line
)
1145 && !current_buffer
->clip_changed
1146 && FRAME_VISIBLE_P (XFRAME (w
->frame
))
1147 && !FRAME_OBSCURED_P (XFRAME (w
->frame
))
1148 /* Make sure recorded data applies to current buffer, etc */
1149 && this_line_buffer
== current_buffer
1150 && current_buffer
== XBUFFER (w
->buffer
)
1151 && NILP (w
->force_start
)
1152 /* Point must be on the line that we have info recorded about */
1154 && PT
<= Z
- tlendpos
1155 /* All text outside that line, including its final newline,
1156 must be unchanged */
1157 && ((XFASTINT (w
->last_modified
) >= MODIFF
1158 && (XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
))
1159 || (beg_unchanged
>= tlbufpos
- 1
1161 /* If selective display, can't optimize
1162 if the changes start at the beginning of the line. */
1163 && ((INTEGERP (current_buffer
->selective_display
)
1164 && XINT (current_buffer
->selective_display
) > 0
1165 ? (beg_unchanged
>= tlbufpos
1168 && end_unchanged
>= tlendpos
1169 && Z
- GPT
>= tlendpos
)))
1171 int tlbufpos_byte
= CHAR_TO_BYTE (tlbufpos
);
1172 if (tlbufpos
> BEGV
&& FETCH_BYTE (tlbufpos_byte
- 1) != '\n'
1174 || FETCH_BYTE (tlbufpos_byte
) == '\n'))
1175 /* Former continuation line has disappeared by becoming empty */
1177 else if (XFASTINT (w
->last_modified
) < MODIFF
1178 || XFASTINT (w
->last_overlay_modified
) < OVERLAY_MODIFF
1179 || MINI_WINDOW_P (w
))
1181 /* We have to handle the case of continuation around a
1182 wide-column character (See the comment in indent.c around
1185 For instance, in the following case:
1187 -------- Insert --------
1188 K_A_N_\\ `a' K_A_N_a\ `X_' are wide-column chars.
1189 J_I_ ==> J_I_ `^^' are cursors.
1193 As we have to redraw the line above, we should goto cancel. */
1195 struct position val
;
1197 int opoint
= PT
, opoint_byte
= PT_BYTE
;
1199 scan_newline (tlbufpos
, tlbufpos_byte
, BEGV
, BEGV_BYTE
, -1, 1);
1201 val
= *compute_motion (PT
, 0,
1202 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1205 1 << (BITS_PER_SHORT
- 1),
1206 1 << (BITS_PER_SHORT
- 1),
1207 window_internal_width (w
) - 1,
1208 XINT (w
->hscroll
), 0, w
);
1209 SET_PT_BOTH (opoint
, opoint_byte
);
1210 if (val
.hpos
!= this_line_start_hpos
)
1214 overlay_arrow_seen
= 0;
1215 zv_strings_seen
= 0;
1216 display_text_line (w
, tlbufpos
, tlbufpos_byte
,
1217 this_line_vpos
, this_line_start_hpos
,
1218 pos_tab_offset (w
, tlbufpos
, tlbufpos_byte
), 0);
1219 /* If line contains point, is not continued,
1220 and ends at same distance from eob as before, we win */
1221 if (cursor_vpos
>= 0 && this_line_bufpos
1222 && this_line_endpos
== tlendpos
)
1224 /* If this is not the window's last line,
1225 we must adjust the charstarts of the lines below. */
1226 if (this_line_vpos
+ 1
1227 < XFASTINT (w
->top
) + window_internal_height (w
))
1229 int left
= WINDOW_LEFT_MARGIN (w
);
1230 int *charstart_next_line
1231 = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w
)))->charstarts
[this_line_vpos
+ 1];
1234 if (Z
- tlendpos
== ZV
)
1235 /* This line ends at end of (accessible part of) buffer.
1236 There is no newline to count. */
1237 adjust
= Z
- tlendpos
- charstart_next_line
[left
];
1239 /* This line ends in a newline.
1240 Must take account of the newline and the rest of the
1241 text that follows. */
1242 adjust
= Z
- tlendpos
+ 1 - charstart_next_line
[left
];
1244 adjust_window_charstarts (w
, this_line_vpos
, adjust
);
1247 if (!WINDOW_FULL_WIDTH_P (w
))
1248 preserve_other_columns (w
);
1254 else if (PT
== XFASTINT (w
->last_point
)
1255 /* Make sure the cursor was last displayed
1256 in this window. Otherwise we have to reposition it. */
1257 && XINT (w
->top
) <= FRAME_CURSOR_Y (selected_frame
)
1258 && (XINT (w
->top
) + XINT (w
->height
)
1259 > FRAME_CURSOR_Y (selected_frame
)))
1263 do_pending_window_change ();
1268 /* If highlighting the region, or if the cursor is in the echo area,
1269 then we can't just move the cursor. */
1270 else if (! (!NILP (Vtransient_mark_mode
)
1271 && !NILP (current_buffer
->mark_active
))
1272 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1273 || highlight_nonselected_windows
)
1274 && NILP (w
->region_showing
)
1275 && !cursor_in_echo_area
)
1277 pos
= *compute_motion (tlbufpos
, 0,
1278 XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0,
1280 PT
, 2, - (1 << (BITS_PER_SHORT
- 1)),
1281 window_internal_width (w
) - 1,
1283 pos_tab_offset (w
, tlbufpos
, tlbufpos_byte
),
1287 int width
= window_internal_width (w
) - 1;
1288 FRAME_CURSOR_X (selected_frame
)
1289 = WINDOW_LEFT_MARGIN (w
) + minmax (0, pos
.hpos
, width
);
1290 FRAME_CURSOR_Y (selected_frame
) = this_line_vpos
;
1297 /* Text changed drastically or point moved off of line */
1298 cancel_line (this_line_vpos
, selected_frame
);
1301 this_line_bufpos
= 0;
1302 all_windows
|= buffer_shared
> 1;
1304 clear_face_cache_count
++;
1308 Lisp_Object tail
, frame
;
1311 /* Clear the face cache, only when we do a full redisplay
1312 and not too often either. */
1313 if (clear_face_cache_count
> 1000)
1315 clear_face_cache ();
1316 clear_face_cache_count
= 0;
1320 /* Recompute # windows showing selected buffer.
1321 This will be incremented each time such a window is displayed. */
1324 FOR_EACH_FRAME (tail
, frame
)
1326 FRAME_PTR f
= XFRAME (frame
);
1327 if (FRAME_WINDOW_P (f
) || f
== selected_frame
)
1330 /* Mark all the scroll bars to be removed; we'll redeem the ones
1331 we want when we redisplay their windows. */
1332 if (condemn_scroll_bars_hook
)
1333 (*condemn_scroll_bars_hook
) (f
);
1335 if (FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
1336 redisplay_windows (FRAME_ROOT_WINDOW (f
), preserve_echo_area
);
1338 /* Any scroll bars which redisplay_windows should have nuked
1339 should now go away. */
1340 if (judge_scroll_bars_hook
)
1341 (*judge_scroll_bars_hook
) (f
);
1345 else if (FRAME_VISIBLE_P (selected_frame
) && !FRAME_OBSCURED_P (selected_frame
))
1347 redisplay_window (selected_window
, 1, preserve_echo_area
);
1348 if (!WINDOW_FULL_WIDTH_P (w
))
1349 preserve_other_columns (w
);
1353 /* Prevent various kinds of signals during display update.
1354 stdio is not robust about handling signals,
1355 which can cause an apparent I/O error. */
1356 if (interrupt_input
)
1366 for (tail
= Vframe_list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1370 if (!FRAMEP (XCONS (tail
)->car
))
1373 f
= XFRAME (XCONS (tail
)->car
);
1375 if ((FRAME_WINDOW_P (f
) || f
== selected_frame
)
1376 && FRAME_VISIBLE_P (f
) && !FRAME_OBSCURED_P (f
))
1378 pause
|= update_frame (f
, 0, 0);
1381 mark_window_display_accurate (f
->root_window
, 1);
1382 if (frame_up_to_date_hook
!= 0)
1383 (*frame_up_to_date_hook
) (f
);
1390 if (FRAME_VISIBLE_P (selected_frame
) && !FRAME_OBSCURED_P (selected_frame
))
1391 pause
= update_frame (selected_frame
, 0, 0);
1395 /* We may have called echo_area_display at the top of this
1396 function. If the echo area is on another frame, that may
1397 have put text on a frame other than the selected one, so the
1398 above call to update_frame would not have caught it. Catch
1401 Lisp_Object mini_window
;
1402 FRAME_PTR mini_frame
;
1404 mini_window
= FRAME_MINIBUF_WINDOW (selected_frame
);
1405 mini_frame
= XFRAME (WINDOW_FRAME (XWINDOW (mini_window
)));
1407 if (mini_frame
!= selected_frame
&& FRAME_WINDOW_P (mini_frame
))
1408 pause
|= update_frame (mini_frame
, 0, 0);
1412 /* If frame does not match, prevent doing single-line-update next time.
1413 Also, don't forget to check every line to update the arrow. */
1416 this_line_bufpos
= 0;
1417 if (!NILP (last_arrow_position
))
1419 last_arrow_position
= Qt
;
1420 last_arrow_string
= Qt
;
1422 /* If we pause after scrolling, some lines in current_frame
1423 may be null, so preserve_other_columns won't be able to
1424 preserve all the vertical-bar separators. So, avoid using it
1426 if (!WINDOW_FULL_WIDTH_P (w
))
1427 update_mode_lines
= 1;
1430 /* Now text on frame agrees with windows, so
1431 put info into the windows for partial redisplay to follow */
1435 register struct buffer
*b
= XBUFFER (w
->buffer
);
1437 blank_end_of_window
= 0;
1438 unchanged_modified
= BUF_MODIFF (b
);
1439 overlay_unchanged_modified
= BUF_OVERLAY_MODIFF (b
);
1440 beg_unchanged
= BUF_GPT (b
) - BUF_BEG (b
);
1441 end_unchanged
= BUF_Z (b
) - BUF_GPT (b
);
1443 /* Record the last place cursor was displayed in this window.
1444 But not if cursor is in the echo area, because in that case
1445 FRAME_CURSOR_X and FRAME_CURSOR_Y are in the echo area. */
1446 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (selected_frame
)
1447 && EQ (FRAME_MINIBUF_WINDOW (selected_frame
), minibuf_window
)))
1449 XSETFASTINT (w
->last_point
, BUF_PT (b
));
1450 XSETFASTINT (w
->last_point_x
, FRAME_CURSOR_X (selected_frame
));
1451 XSETFASTINT (w
->last_point_y
, FRAME_CURSOR_Y (selected_frame
));
1454 /* Make last_point invalid, since we don't really know
1455 where the cursor would be if it were not in the echo area. */
1456 XSETINT (w
->last_point
, -1);
1459 mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame
), 1);
1462 b
->clip_changed
= 0;
1463 w
->update_mode_line
= Qnil
;
1464 XSETFASTINT (w
->last_modified
, BUF_MODIFF (b
));
1465 XSETFASTINT (w
->last_overlay_modified
, BUF_OVERLAY_MODIFF (b
));
1467 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1470 /* Record if we are showing a region, so can make sure to
1471 update it fully at next redisplay. */
1472 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1473 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1474 || highlight_nonselected_windows
)
1475 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1476 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1479 w
->window_end_valid
= w
->buffer
;
1480 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1481 last_arrow_string
= Voverlay_arrow_string
;
1482 if (do_verify_charstarts
)
1483 verify_charstarts (w
);
1484 if (frame_up_to_date_hook
!= 0)
1485 (*frame_up_to_date_hook
) (selected_frame
);
1487 update_mode_lines
= 0;
1488 windows_or_buffers_changed
= 0;
1491 /* Start SIGIO interrupts coming again.
1492 Having them off during the code above
1493 makes it less likely one will discard output,
1494 but not impossible, since there might be stuff
1495 in the system buffer here.
1496 But it is much hairier to try to do anything about that. */
1498 if (interrupt_input
)
1502 /* If something has become visible now which was not before,
1503 redisplay again, so that we get them. */
1506 Lisp_Object tail
, frame
;
1509 FOR_EACH_FRAME (tail
, frame
)
1511 int this_is_visible
= 0;
1513 if (XFRAME (frame
)->visible
)
1514 this_is_visible
= 1;
1515 FRAME_SAMPLE_VISIBILITY (XFRAME (frame
));
1516 if (XFRAME (frame
)->visible
)
1517 this_is_visible
= 1;
1519 if (this_is_visible
)
1523 if (new_count
!= number_of_visible_frames
)
1524 windows_or_buffers_changed
++;
1527 /* Change frame size now if a change is pending. */
1528 do_pending_window_change ();
1530 /* If we just did a pending size change, or have additional
1531 visible frames, redisplay again. */
1532 if (windows_or_buffers_changed
&& !pause
)
1536 /* Redisplay, but leave alone any recent echo area message
1537 unless another message has been requested in its place.
1539 This is useful in situations where you need to redisplay but no
1540 user action has occurred, making it inappropriate for the message
1541 area to be cleared. See tracking_off and
1542 wait_reading_process_input for examples of these situations. */
1545 redisplay_preserve_echo_area ()
1547 if (echo_area_glyphs
== 0 && previous_echo_glyphs
!= 0)
1549 echo_area_glyphs
= previous_echo_glyphs
;
1550 redisplay_internal (1);
1551 echo_area_glyphs
= 0;
1554 redisplay_internal (1);
1558 mark_window_display_accurate (window
, flag
)
1562 register struct window
*w
;
1564 for (;!NILP (window
); window
= w
->next
)
1566 if (!WINDOWP (window
)) abort ();
1567 w
= XWINDOW (window
);
1569 if (!NILP (w
->buffer
))
1571 XSETFASTINT (w
->last_modified
,
1572 !flag
? 0 : BUF_MODIFF (XBUFFER (w
->buffer
)));
1573 XSETFASTINT (w
->last_overlay_modified
,
1574 !flag
? 0 : BUF_OVERLAY_MODIFF (XBUFFER (w
->buffer
)));
1576 = (BUF_MODIFF (XBUFFER (w
->buffer
)) > BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1579 /* Record if we are showing a region, so can make sure to
1580 update it fully at next redisplay. */
1581 w
->region_showing
= (!NILP (Vtransient_mark_mode
)
1582 && (w
== XWINDOW (current_buffer
->last_selected_window
)
1583 || highlight_nonselected_windows
)
1584 && !NILP (XBUFFER (w
->buffer
)->mark_active
)
1585 ? Fmarker_position (XBUFFER (w
->buffer
)->mark
)
1589 w
->window_end_valid
= w
->buffer
;
1590 w
->update_mode_line
= Qnil
;
1591 if (!NILP (w
->buffer
) && flag
)
1592 XBUFFER (w
->buffer
)->clip_changed
= 0;
1594 if (!NILP (w
->vchild
))
1595 mark_window_display_accurate (w
->vchild
, flag
);
1596 if (!NILP (w
->hchild
))
1597 mark_window_display_accurate (w
->hchild
, flag
);
1602 last_arrow_position
= COERCE_MARKER (Voverlay_arrow_position
);
1603 last_arrow_string
= Voverlay_arrow_string
;
1607 /* t is unequal to any useful value of Voverlay_arrow_... */
1608 last_arrow_position
= Qt
;
1609 last_arrow_string
= Qt
;
1613 /* Update the menu bar item list for frame F.
1614 This has to be done before we start to fill in any display lines,
1615 because it can call eval.
1617 If SAVE_MATCH_DATA is 1, we must save and restore it here. */
1620 update_menu_bar (f
, save_match_data
)
1622 int save_match_data
;
1624 struct buffer
*old
= current_buffer
;
1626 register struct window
*w
;
1628 window
= FRAME_SELECTED_WINDOW (f
);
1629 w
= XWINDOW (window
);
1631 if (update_mode_lines
)
1632 w
->update_mode_line
= Qt
;
1634 if (FRAME_WINDOW_P (f
)
1636 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1637 FRAME_EXTERNAL_MENU_BAR (f
)
1639 FRAME_MENU_BAR_LINES (f
) > 0
1641 : FRAME_MENU_BAR_LINES (f
) > 0)
1643 /* If the user has switched buffers or windows, we need to
1644 recompute to reflect the new bindings. But we'll
1645 recompute when update_mode_lines is set too; that means
1646 that people can use force-mode-line-update to request
1647 that the menu bar be recomputed. The adverse effect on
1648 the rest of the redisplay algorithm is about the same as
1649 windows_or_buffers_changed anyway. */
1650 if (windows_or_buffers_changed
1651 || !NILP (w
->update_mode_line
)
1652 || ((BUF_SAVE_MODIFF (XBUFFER (w
->buffer
))
1653 < BUF_MODIFF (XBUFFER (w
->buffer
)))
1654 != !NILP (w
->last_had_star
))
1655 || ((!NILP (Vtransient_mark_mode
)
1656 && !NILP (XBUFFER (w
->buffer
)->mark_active
))
1657 != !NILP (w
->region_showing
)))
1659 struct buffer
*prev
= current_buffer
;
1660 int count
= specpdl_ptr
- specpdl
;
1662 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1663 if (save_match_data
)
1664 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
1665 if (NILP (Voverriding_local_map_menu_flag
))
1667 specbind (Qoverriding_terminal_local_map
, Qnil
);
1668 specbind (Qoverriding_local_map
, Qnil
);
1671 /* Run the Lucid hook. */
1672 call1 (Vrun_hooks
, Qactivate_menubar_hook
);
1673 /* If it has changed current-menubar from previous value,
1674 really recompute the menubar from the value. */
1675 if (! NILP (Vlucid_menu_bar_dirty_flag
))
1676 call0 (Qrecompute_lucid_menubar
);
1677 safe_run_hooks (Qmenu_bar_update_hook
);
1678 FRAME_MENU_BAR_ITEMS (f
) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f
));
1679 /* Redisplay the menu bar in case we changed it. */
1680 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
1681 if (FRAME_WINDOW_P (f
))
1682 set_frame_menubar (f
, 0, 0);
1684 /* On a terminal screen, the menu bar is an ordinary screen
1685 line, and this makes it get updated. */
1686 w
->update_mode_line
= Qt
;
1687 #else /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1688 /* In the non-toolkit version, the menu bar is an ordinary screen
1689 line, and this makes it get updated. */
1690 w
->update_mode_line
= Qt
;
1691 #endif /* ! (USE_X_TOOLKIT || HAVE_NTGUI) */
1693 unbind_to (count
, Qnil
);
1694 set_buffer_internal_1 (prev
);
1701 /* Redisplay WINDOW and its subwindows and siblings. */
1704 redisplay_windows (window
, preserve_echo_area
)
1706 int preserve_echo_area
;
1708 for (; !NILP (window
); window
= XWINDOW (window
)->next
)
1709 redisplay_window (window
, 0, preserve_echo_area
);
1712 /* Return value in display table DP (Lisp_Char_Table *) for character
1713 C. Since a display table doesn't have any parent, we don't have to
1714 follow parent. Do not call this function directly but use the
1715 macro DISP_CHAR_VECTOR. */
1717 disp_char_vector (dp
, c
)
1718 struct Lisp_Char_Table
*dp
;
1724 if (SINGLE_BYTE_CHAR_P (c
)) return (dp
->contents
[c
]);
1726 SPLIT_NON_ASCII_CHAR (c
, code
[0], code
[1], code
[2]);
1727 if (code
[0] != CHARSET_COMPOSITION
)
1729 if (code
[1] < 32) code
[1] = -1;
1730 else if (code
[2] < 32) code
[2] = -1;
1732 /* Here, the possible range of CODE[0] (== charset ID) is
1733 128..MAX_CHARSET. Since the top level char table contains data
1734 for multibyte characters after 256th element, we must increment
1735 CODE[0] by 128 to get a correct index. */
1737 code
[3] = -1; /* anchor */
1739 for (i
= 0; code
[i
] >= 0; i
++, dp
= XCHAR_TABLE (val
))
1741 val
= dp
->contents
[code
[i
]];
1742 if (!SUB_CHAR_TABLE_P (val
))
1743 return (NILP (val
) ? dp
->defalt
: val
);
1745 /* Here, VAL is a sub char table. We return the default value of it. */
1746 return (dp
->defalt
);
1749 /* Redisplay window WINDOW and its subwindows. */
1752 redisplay_window (window
, just_this_one
, preserve_echo_area
)
1754 int just_this_one
, preserve_echo_area
;
1756 register struct window
*w
= XWINDOW (window
);
1757 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
1760 int lpoint_byte
= PT_BYTE
;
1761 struct buffer
*old
= current_buffer
;
1762 register int width
= window_internal_width (w
) - 1;
1763 register int startp
, startp_byte
;
1764 register int hscroll
= XINT (w
->hscroll
);
1765 struct position pos
;
1767 int opoint_byte
= PT_BYTE
;
1769 int update_mode_line
;
1770 struct Lisp_Char_Table
*dp
= window_display_table (w
);
1771 int really_switched_buffer
= 0;
1772 int count
= specpdl_ptr
- specpdl
;
1774 if (Z
== Z_BYTE
&& lpoint
!= lpoint_byte
)
1776 if (lpoint_byte
< lpoint
)
1779 if (FRAME_HEIGHT (f
) == 0) abort (); /* Some bug zeros some core */
1781 /* If this is a combination window, do its children; that's all. */
1783 if (!NILP (w
->vchild
))
1785 redisplay_windows (w
->vchild
, preserve_echo_area
);
1788 if (!NILP (w
->hchild
))
1790 redisplay_windows (w
->hchild
, preserve_echo_area
);
1793 if (NILP (w
->buffer
))
1796 specbind (Qinhibit_point_motion_hooks
, Qt
);
1798 height
= window_internal_height (w
);
1799 update_mode_line
= (!NILP (w
->update_mode_line
) || update_mode_lines
);
1800 if (XBUFFER (w
->buffer
)->clip_changed
)
1801 update_mode_line
= 1;
1803 if (MINI_WINDOW_P (w
))
1805 if (w
== XWINDOW (echo_area_window
) && echo_area_glyphs
)
1806 /* We've already displayed the echo area glyphs in this window. */
1807 goto finish_scroll_bars
;
1808 else if (w
!= XWINDOW (minibuf_window
))
1810 /* This is a minibuffer, but it's not the currently active one,
1812 int vpos
= XFASTINT (w
->top
);
1815 for (i
= 0; i
< height
; i
++)
1817 get_display_line (f
, vpos
+ i
, 0);
1818 display_string (w
, vpos
+ i
, "", 0,
1819 FRAME_LEFT_SCROLL_BAR_WIDTH (f
),
1823 goto finish_scroll_bars
;
1827 /* Otherwise set up data on this window; select its buffer and point value */
1829 if (update_mode_line
)
1830 /* Really select the buffer, for the sake of buffer-local variables. */
1832 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1833 really_switched_buffer
= 1;
1836 set_buffer_temp (XBUFFER (w
->buffer
));
1839 opoint_byte
= PT_BYTE
;
1841 if (Z
== Z_BYTE
&& opoint
!= opoint_byte
)
1843 if (opoint_byte
< opoint
)
1846 /* If %c is in mode line, update it if needed. */
1847 if (!NILP (w
->column_number_displayed
)
1848 /* This alternative quickly identifies a common case
1849 where no change is needed. */
1850 && !(PT
== XFASTINT (w
->last_point
)
1851 && XFASTINT (w
->last_modified
) >= MODIFF
1852 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)
1853 && XFASTINT (w
->column_number_displayed
) != current_column ())
1854 update_mode_line
= 1;
1856 /* Count number of windows showing the selected buffer.
1857 An indirect buffer counts as its base buffer. */
1861 struct buffer
*current_base
, *window_base
;
1862 current_base
= current_buffer
;
1863 window_base
= XBUFFER (XWINDOW (selected_window
)->buffer
);
1864 if (current_base
->base_buffer
)
1865 current_base
= current_base
->base_buffer
;
1866 if (window_base
->base_buffer
)
1867 window_base
= window_base
->base_buffer
;
1868 if (current_base
== window_base
)
1872 /* POINT refers normally to the selected window.
1873 For any other window, set up appropriate value. */
1875 if (!EQ (window
, selected_window
))
1877 int new_pt
= XMARKER (w
->pointm
)->charpos
;
1878 int new_pt_byte
= marker_byte_position (w
->pointm
);
1882 new_pt_byte
= BEGV_BYTE
;
1883 set_marker_both (w
->pointm
, Qnil
, BEGV
, BEGV_BYTE
);
1885 else if (new_pt
> (ZV
- 1))
1888 new_pt_byte
= ZV_BYTE
;
1889 set_marker_both (w
->pointm
, Qnil
, ZV
, ZV_BYTE
);
1891 /* We don't use SET_PT so that the point-motion hooks don't run. */
1892 TEMP_SET_PT_BOTH (new_pt
, new_pt_byte
);
1895 /* If any of the character widths specified in the display table
1896 have changed, invalidate the width run cache. It's true that this
1897 may be a bit late to catch such changes, but the rest of
1898 redisplay goes (non-fatally) haywire when the display table is
1899 changed, so why should we worry about doing any better? */
1900 if (current_buffer
->width_run_cache
)
1902 struct Lisp_Char_Table
*disptab
= buffer_display_table ();
1904 if (! disptab_matches_widthtab (disptab
,
1905 XVECTOR (current_buffer
->width_table
)))
1907 invalidate_region_cache (current_buffer
,
1908 current_buffer
->width_run_cache
,
1910 recompute_width_table (current_buffer
, disptab
);
1914 /* If window-start is screwed up, choose a new one. */
1915 if (XMARKER (w
->start
)->buffer
!= current_buffer
)
1918 startp
= marker_position (w
->start
);
1919 startp_byte
= marker_byte_position (w
->start
);
1921 /* If someone specified a new starting point but did not insist,
1922 check whether it can be used. */
1923 if (!NILP (w
->optional_new_start
)
1924 && startp
>= BEGV
&& startp
<= ZV
)
1926 w
->optional_new_start
= Qnil
;
1927 /* Check whether this start pos is usable given where point is. */
1929 pos
= *compute_motion (startp
, 0,
1930 (((EQ (window
, minibuf_window
)
1932 ? minibuf_prompt_width
: 0)
1933 + (hscroll
? 1 - hscroll
: 0)),
1936 /* BUG FIX: See the comment of
1937 Fpos_visible_in_window_p (window.c). */
1938 - (1 << (BITS_PER_SHORT
- 1)),
1940 pos_tab_offset (w
, startp
, startp_byte
), w
);
1941 /* If PT does fit on the screen, we will use this start pos,
1942 so do so by setting force_start. */
1943 if (pos
.bufpos
== PT
)
1944 w
->force_start
= Qt
;
1947 /* Handle case where place to start displaying has been specified,
1948 unless the specified location is outside the accessible range. */
1949 if (!NILP (w
->force_start
))
1951 w
->force_start
= Qnil
;
1952 /* Forget any recorded base line for line number display. */
1953 w
->base_line_number
= Qnil
;
1954 /* Redisplay the mode line. Select the buffer properly for that.
1955 Also, run the hook window-scroll-functions
1956 because we have scrolled. */
1957 /* Note, we do this after clearing force_start because
1958 if there's an error, it is better to forget about force_start
1959 than to get into an infinite loop calling the hook functions
1960 and having them get more errors. */
1961 if (!update_mode_line
1962 || ! NILP (Vwindow_scroll_functions
))
1964 Lisp_Object temp
[3];
1966 if (!really_switched_buffer
)
1968 set_buffer_temp (old
);
1969 set_buffer_internal_1 (XBUFFER (w
->buffer
));
1971 really_switched_buffer
= 1;
1972 update_mode_line
= 1;
1973 w
->update_mode_line
= Qt
;
1974 if (! NILP (Vwindow_scroll_functions
))
1976 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
1977 make_number (startp
));
1978 startp
= marker_position (w
->start
);
1979 startp_byte
= marker_byte_position (w
->start
);
1982 XSETFASTINT (w
->last_modified
, 0);
1983 XSETFASTINT (w
->last_overlay_modified
, 0);
1984 if (startp
< BEGV
) startp
= BEGV
, startp_byte
= BEGV_BYTE
;
1985 if (startp
> ZV
) startp
= ZV
, startp
= ZV_BYTE
;
1986 try_window (window
, startp
);
1987 if (cursor_vpos
< 0)
1989 /* If point does not appear, move point so it does appear */
1990 pos
= *compute_motion (startp
, 0,
1991 (((EQ (window
, minibuf_window
)
1993 ? minibuf_prompt_width
: 0)
1994 + (hscroll
? 1 - hscroll
: 0)),
1997 - (1 << (BITS_PER_SHORT
- 1)),
1999 pos_tab_offset (w
, startp
, startp_byte
),
2001 TEMP_SET_PT_BOTH (pos
.bufpos
, pos
.bytepos
);
2002 if (w
!= XWINDOW (selected_window
))
2003 set_marker_both (w
->pointm
, Qnil
, PT
, PT_BYTE
);
2006 if (current_buffer
== old
)
2009 lpoint_byte
= PT_BYTE
;
2011 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
2012 + minmax (0, pos
.hpos
, width
));
2013 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
2015 /* If we are highlighting the region,
2016 then we just changed the region, so redisplay to show it. */
2017 if (!NILP (Vtransient_mark_mode
)
2018 && !NILP (current_buffer
->mark_active
))
2020 cancel_my_columns (XWINDOW (window
));
2021 try_window (window
, startp
);
2027 /* Handle case where text has not changed, only point,
2028 and it has not moved off the frame. */
2030 /* This code is not used for minibuffer for the sake of
2031 the case of redisplaying to replace an echo area message;
2032 since in that case the minibuffer contents per se are usually unchanged.
2033 This code is of no real use in the minibuffer since
2034 the handling of this_line_bufpos, etc.,
2035 in redisplay handles the same cases. */
2037 if (XFASTINT (w
->last_modified
) >= MODIFF
2038 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
2039 && PT
>= startp
&& !current_buffer
->clip_changed
2040 && (just_this_one
|| WINDOW_FULL_WIDTH_P (w
))
2041 /* If force-mode-line-update was called, really redisplay;
2042 that's how redisplay is forced after e.g. changing
2043 buffer-invisibility-spec. */
2044 && NILP (w
->update_mode_line
)
2045 /* Can't use this case if highlighting a region. */
2046 && !(!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
))
2047 && NILP (w
->region_showing
)
2048 /* If end pos is out of date, scroll bar and percentage will be wrong */
2049 && INTEGERP (w
->window_end_vpos
)
2050 && XFASTINT (w
->window_end_vpos
) < XFASTINT (w
->height
)
2051 && !EQ (window
, minibuf_window
)
2052 && (!MARKERP (Voverlay_arrow_position
)
2053 || current_buffer
!= XMARKER (Voverlay_arrow_position
)->buffer
))
2055 /* All positions in this clause are relative to the window edge. */
2057 int this_scroll_margin
= scroll_margin
;
2058 int last_point_y
= XFASTINT (w
->last_point_y
) - XINT (w
->top
);
2059 int last_point_x
= (XFASTINT (w
->last_point_x
) - WINDOW_LEFT_MARGIN (w
));
2061 /* Find where PT is located now on the frame. */
2062 /* Check just_this_one as a way of verifying that the
2063 window edges have not changed. */
2064 if (PT
== XFASTINT (w
->last_point
) && just_this_one
2065 /* If CURSOR_IN_ECHO_AREA, last_point_x and last_point_y
2066 refer to the echo area and are not related to this window. */
2067 && ! cursor_in_echo_area
)
2069 pos
.hpos
= last_point_x
;
2070 pos
.vpos
= last_point_y
;
2073 else if (PT
> XFASTINT (w
->last_point
)
2074 && ! cursor_in_echo_area
2075 && XFASTINT (w
->last_point
) > startp
&& just_this_one
2076 /* We can't use this if point is in the left margin of a
2077 hscrolled window, because w->last_point_x has been
2078 clipped to the window edges. */
2079 && !(last_point_x
<= 0 && hscroll
))
2081 int last_point
= XFASTINT (w
->last_point
);
2082 int last_point_byte
= CHAR_TO_BYTE (last_point
);
2083 int tab_offset
= (pos_tab_offset (w
, last_point
, last_point_byte
)
2084 - (last_point_x
+ hscroll
- !! hscroll
));
2086 pos
= *compute_motion (last_point
, last_point_y
, last_point_x
, 0,
2088 /* BUG FIX: See the comment of
2089 Fpos_visible_in_window_p (window.c). */
2090 - (1 << (BITS_PER_SHORT
- 1)),
2097 pos
= *compute_motion (startp
, 0, (hscroll
? 1 - hscroll
: 0), 0,
2099 /* BUG FIX: See the comment of
2100 Fpos_visible_in_window_p (window.c). */
2101 - (1 << (BITS_PER_SHORT
- 1)),
2103 pos_tab_offset (w
, startp
, startp_byte
),
2107 /* Don't use a scroll margin that is negative or too large. */
2108 if (this_scroll_margin
< 0)
2109 this_scroll_margin
= 0;
2111 if (XINT (w
->height
) < 4 * scroll_margin
)
2112 this_scroll_margin
= XINT (w
->height
) / 4;
2114 /* If point fits on the screen, and not within the scroll margin,
2116 if (pos
.vpos
< height
- this_scroll_margin
2117 && (pos
.vpos
>= this_scroll_margin
|| startp
== BEGV
))
2119 /* Ok, point is still on frame */
2120 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
2122 /* These variables are supposed to be origin 1 */
2123 FRAME_CURSOR_X (f
) = (WINDOW_LEFT_MARGIN (w
)
2124 + minmax (0, pos
.hpos
, width
));
2125 FRAME_CURSOR_Y (f
) = pos
.vpos
+ XFASTINT (w
->top
);
2127 /* This doesn't do the trick, because if a window to the right of
2128 this one must be redisplayed, this does nothing because there
2129 is nothing in DesiredFrame yet, and then the other window is
2130 redisplayed, making likes that are empty in this window's columns.
2131 if (WINDOW_FULL_WIDTH_P (w))
2132 preserve_my_columns (w);
2134 if (current_buffer
->clip_changed
2135 && ! NILP (Vwindow_scroll_functions
))
2136 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2137 make_number (marker_position (w
->start
)));
2141 /* Don't bother trying redisplay with same start;
2142 we already know it will lose. */
2144 /* If current starting point was originally the beginning of a line
2145 but no longer is, find a new starting point. */
2146 else if (!NILP (w
->start_at_line_beg
)
2148 || FETCH_BYTE (startp_byte
- 1) == '\n'))
2152 else if (just_this_one
&& !MINI_WINDOW_P (w
)
2154 && XFASTINT (w
->last_modified
)
2155 /* or else vmotion on first line won't work. */
2156 && ! NILP (w
->start_at_line_beg
)
2157 && ! EQ (w
->window_end_valid
, Qnil
)
2158 && do_id
&& !current_buffer
->clip_changed
2159 && !blank_end_of_window
2160 && WINDOW_FULL_WIDTH_P (w
)
2161 /* Can't use this case if highlighting a region. */
2162 && !(!NILP (Vtransient_mark_mode
)
2163 && !NILP (current_buffer
->mark_active
))
2164 /* Don't use try_window_id if newline
2165 doesn't display as the end of a line. */
2166 && !(dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, '\n')))
2167 && NILP (w
->region_showing
)
2168 && EQ (last_arrow_position
, COERCE_MARKER (Voverlay_arrow_position
))
2169 && EQ (last_arrow_string
, Voverlay_arrow_string
)
2170 && (tem
= try_window_id (FRAME_SELECTED_WINDOW (f
)))
2173 /* tem > 0 means success. tem == -1 means choose new start.
2174 tem == -2 means try again with same start,
2175 and nothing but whitespace follows the changed stuff.
2176 tem == 0 means try again with same start. */
2180 else if (startp
>= BEGV
&& startp
<= ZV
2182 /* Avoid starting at end of buffer. */
2183 #if 0 /* This change causes trouble for M-! finger & RET.
2184 It will have to be considered later. */
2185 || ! EQ (window
, selected_window
)
2186 /* Don't do the recentering if redisplay
2187 is not for no user action. */
2188 || preserve_echo_area
2191 || (XFASTINT (w
->last_modified
) >= MODIFF
2192 && XFASTINT (w
->last_overlay_modified
) >= OVERLAY_MODIFF
)))
2194 /* Try to redisplay starting at same place as before */
2195 /* If point has not moved off frame, accept the results */
2196 try_window (window
, startp
);
2197 if (cursor_vpos
>= 0)
2199 if (!just_this_one
|| current_buffer
->clip_changed
2200 || beg_unchanged
< startp
)
2201 /* Forget any recorded base line for line number display. */
2202 w
->base_line_number
= Qnil
;
2204 if (current_buffer
->clip_changed
2205 && ! NILP (Vwindow_scroll_functions
))
2206 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2207 make_number (marker_position (w
->start
)));
2212 cancel_my_columns (w
);
2215 XSETFASTINT (w
->last_modified
, 0);
2216 XSETFASTINT (w
->last_overlay_modified
, 0);
2217 /* Redisplay the mode line. Select the buffer properly for that. */
2218 if (!update_mode_line
)
2220 if (!really_switched_buffer
)
2222 set_buffer_temp (old
);
2223 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2225 update_mode_line
= 1;
2226 w
->update_mode_line
= Qt
;
2229 /* Try to scroll by specified few lines */
2231 if ((scroll_conservatively
|| scroll_step
)
2232 && !current_buffer
->clip_changed
2233 && startp
>= BEGV
&& startp
<= ZV
)
2235 int this_scroll_margin
= scroll_margin
;
2236 int scroll_margin_pos
, scroll_margin_bytepos
;
2237 int scroll_max
= scroll_step
;
2240 if (scroll_conservatively
)
2241 scroll_max
= scroll_conservatively
;
2243 /* Don't use a scroll margin that is negative or too large. */
2244 if (this_scroll_margin
< 0)
2245 this_scroll_margin
= 0;
2247 if (XINT (w
->height
) < 4 * this_scroll_margin
)
2248 this_scroll_margin
= XINT (w
->height
) / 4;
2250 ltemp
= Fwindow_end (window
, Qt
);
2251 scroll_margin_pos
= XINT (ltemp
);
2253 if (this_scroll_margin
)
2255 pos
= *vmotion (scroll_margin_pos
, -this_scroll_margin
, w
);
2256 scroll_margin_pos
= pos
.bufpos
;
2257 scroll_margin_bytepos
= pos
.bytepos
;
2260 scroll_margin_bytepos
= CHAR_TO_BYTE (scroll_margin_pos
);
2262 if (PT
>= scroll_margin_pos
)
2264 struct position pos
;
2265 pos
= *compute_motion (scroll_margin_pos
, 0, 0, 0,
2266 PT
, XFASTINT (w
->height
), 0,
2267 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2268 pos_tab_offset (w
, scroll_margin_pos
,
2269 scroll_margin_bytepos
),
2271 if (pos
.vpos
>= scroll_max
)
2274 pos
= *vmotion (startp
,
2275 scroll_conservatively
? pos
.vpos
+ 1 : scroll_step
,
2278 if (! NILP (Vwindow_scroll_functions
))
2280 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2281 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2282 make_number (pos
.bufpos
));
2283 pos
.bufpos
= marker_position (w
->start
);
2285 try_window (window
, pos
.bufpos
);
2286 if (cursor_vpos
>= 0)
2288 if (!just_this_one
|| current_buffer
->clip_changed
2289 || beg_unchanged
< startp
)
2290 /* Forget any recorded base line for line number display. */
2291 w
->base_line_number
= Qnil
;
2295 cancel_my_columns (w
);
2298 scroll_margin_pos
= startp
;
2299 if (this_scroll_margin
)
2301 pos
= *vmotion (scroll_margin_pos
, this_scroll_margin
, w
);
2302 scroll_margin_pos
= pos
.bufpos
;
2304 if (PT
< scroll_margin_pos
)
2306 struct position pos
;
2307 pos
= *compute_motion (PT
, 0, 0, 0,
2308 scroll_margin_pos
, XFASTINT (w
->height
), 0,
2309 XFASTINT (w
->width
), XFASTINT (w
->hscroll
),
2310 pos_tab_offset (w
, PT
, PT_BYTE
),
2312 if (pos
.vpos
> scroll_max
)
2315 pos
= *vmotion (startp
,
2316 scroll_conservatively
? -pos
.vpos
: - scroll_step
,
2319 if (! NILP (Vwindow_scroll_functions
))
2321 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2322 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2323 make_number (pos
.bufpos
));
2324 pos
.bufpos
= marker_position (w
->start
);
2326 try_window (window
, pos
.bufpos
);
2327 if (cursor_vpos
>= 0)
2329 if (!just_this_one
|| current_buffer
->clip_changed
2330 || beg_unchanged
< startp
)
2331 /* Forget any recorded base line for line number display. */
2332 w
->base_line_number
= Qnil
;
2336 cancel_my_columns (w
);
2342 if (scroll_step
&& ! scroll_margin
&& !current_buffer
->clip_changed
2343 && startp
>= BEGV
&& startp
<= ZV
)
2345 if (margin_call
== 0)
2346 margin_call
= (PT
> startp
? 1 : -1);
2347 if (margin_call
> 0)
2349 pos
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), scroll_step
, w
);
2350 if (pos
.vpos
>= height
)
2354 pos
= *vmotion (startp
, (margin_call
< 0 ? - scroll_step
: scroll_step
),
2357 if (PT
>= pos
.bufpos
)
2359 if (! NILP (Vwindow_scroll_functions
))
2361 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2362 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2363 make_number (pos
.bufpos
));
2364 pos
.bufpos
= marker_position (w
->start
);
2366 try_window (window
, pos
.bufpos
);
2367 if (cursor_vpos
>= 0)
2369 if (!just_this_one
|| current_buffer
->clip_changed
2370 || beg_unchanged
< startp
)
2371 /* Forget any recorded base line for line number display. */
2372 w
->base_line_number
= Qnil
;
2376 cancel_my_columns (w
);
2382 /* Finally, just choose place to start which centers point */
2385 /* Forget any previously recorded base line for line number display. */
2386 w
->base_line_number
= Qnil
;
2388 pos
= *vmotion (PT
, - (height
/ 2), w
);
2390 /* The minibuffer is often just one line. Ordinary scrolling
2391 gives little overlap and looks bad. So show 20 chars before point. */
2393 && (pos
.bufpos
>= PT
- minibuffer_scroll_overlap
2394 /* If we scrolled less than 1/2 line forward, we will
2395 get too much overlap, so change to the usual amount. */
2396 || pos
.bufpos
< startp
+ width
/ 2)
2397 && PT
> BEGV
+ minibuffer_scroll_overlap
2398 /* If we scrolled to an actual line boundary,
2399 that's different; don't ignore line boundaries. */
2400 && FETCH_BYTE (pos
.bytepos
- 1) != '\n')
2402 pos
.bufpos
= PT
- minibuffer_scroll_overlap
;
2403 pos
.bytepos
= CHAR_TO_BYTE (pos
.bufpos
);
2406 /* Set startp here explicitly in case that helps avoid an infinite loop
2407 in case the window-scroll-functions functions get errors. */
2408 set_marker_both (w
->start
, Qnil
, pos
.bufpos
, pos
.bytepos
);
2409 if (! NILP (Vwindow_scroll_functions
))
2411 run_hook_with_args_2 (Qwindow_scroll_functions
, window
,
2412 make_number (pos
.bufpos
));
2413 pos
.bufpos
= marker_position (w
->start
);
2414 pos
.bytepos
= marker_byte_position (w
->start
);
2416 try_window (window
, pos
.bufpos
);
2418 startp
= marker_position (w
->start
);
2419 startp_byte
= marker_byte_position (w
->start
);
2420 w
->start_at_line_beg
2421 = (startp
== BEGV
|| FETCH_BYTE (startp_byte
- 1) == '\n') ? Qt
: Qnil
;
2424 if ((update_mode_line
2425 /* If window not full width, must redo its mode line
2426 if the window to its side is being redone */
2427 || (!just_this_one
&& !WINDOW_FULL_WIDTH_P (w
))
2428 || INTEGERP (w
->base_line_pos
)
2429 || (!NILP (w
->column_number_displayed
)
2430 && XFASTINT (w
->column_number_displayed
) != current_column ()))
2431 && height
!= XFASTINT (w
->height
))
2433 FRAME_PTR oframe
= selected_frame
;
2434 if (!really_switched_buffer
)
2436 set_buffer_temp (old
);
2437 set_buffer_internal_1 (XBUFFER (w
->buffer
));
2438 really_switched_buffer
= 1;
2441 display_mode_line (w
);
2442 selected_frame
= oframe
;
2444 if (! line_number_displayed
2445 && ! BUFFERP (w
->base_line_pos
))
2447 w
->base_line_pos
= Qnil
;
2448 w
->base_line_number
= Qnil
;
2451 /* When we reach a frame's selected window, redo the frame's menu bar. */
2452 if (update_mode_line
2453 && (FRAME_WINDOW_P (f
)
2455 #if defined (USE_X_TOOLKIT) || defined (HAVE_NTGUI)
2456 FRAME_EXTERNAL_MENU_BAR (f
)
2458 FRAME_MENU_BAR_LINES (f
) > 0
2460 : FRAME_MENU_BAR_LINES (f
) > 0)
2461 && EQ (FRAME_SELECTED_WINDOW (f
), window
))
2462 display_menu_bar (w
);
2465 if (FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
2467 int start
, end
, whole
;
2469 /* Calculate the start and end positions for the current window.
2470 At some point, it would be nice to choose between scrollbars
2471 which reflect the whole buffer size, with special markers
2472 indicating narrowing, and scrollbars which reflect only the
2475 Note that minibuffers sometimes aren't displaying any text. */
2476 if (! MINI_WINDOW_P (w
)
2477 || (w
== XWINDOW (minibuf_window
) && ! echo_area_glyphs
))
2480 start
= marker_position (w
->start
) - BEGV
;
2481 /* I don't think this is guaranteed to be right. For the
2482 moment, we'll pretend it is. */
2483 end
= (Z
- XINT (w
->window_end_pos
)) - BEGV
;
2485 if (end
< start
) end
= start
;
2486 if (whole
< (end
- start
)) whole
= end
- start
;
2489 start
= end
= whole
= 0;
2491 /* Indicate what this scroll bar ought to be displaying now. */
2492 (*set_vertical_scroll_bar_hook
) (w
, end
- start
, whole
, start
);
2494 /* Note that we actually used the scroll bar attached to this window,
2495 so it shouldn't be deleted at the end of redisplay. */
2496 (*redeem_scroll_bar_hook
) (w
);
2499 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
2500 if (really_switched_buffer
)
2501 set_buffer_internal_1 (old
);
2503 set_buffer_temp (old
);
2504 TEMP_SET_PT_BOTH (lpoint
, lpoint_byte
);
2506 unbind_to (count
, Qnil
);
2509 /* Do full redisplay on one window, starting at position `pos'. */
2512 try_window (window
, pos
)
2516 register struct window
*w
= XWINDOW (window
);
2517 register int height
= window_internal_height (w
);
2518 register int vpos
= XFASTINT (w
->top
);
2519 register int last_text_vpos
= vpos
;
2520 FRAME_PTR f
= XFRAME (w
->frame
);
2521 int width
= window_internal_width (w
) - 1;
2522 struct position val
;
2524 /* POS should never be out of range! */
2525 if (pos
< XBUFFER (w
->buffer
)->begv
2526 || pos
> XBUFFER (w
->buffer
)->zv
)
2529 if (XMARKER (w
->start
)->charpos
!= pos
)
2530 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2533 overlay_arrow_seen
= 0;
2534 zv_strings_seen
= 0;
2535 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
2536 val
.ovstring_chars_done
= 0;
2537 val
.bytepos
= marker_byte_position (w
->start
);
2538 val
.tab_offset
= pos_tab_offset (w
, pos
, val
.bytepos
);
2540 while (--height
>= 0)
2542 val
= *display_text_line (w
, pos
, val
.bytepos
, vpos
,
2543 val
.hpos
, val
.tab_offset
,
2544 val
.ovstring_chars_done
);
2545 /* The following code is omitted because we maintain tab_offset
2548 tab_offset
+= width
;
2549 if (val
.vpos
) tab_offset
= 0;
2552 if (pos
!= val
.bufpos
)
2555 #ifdef USE_TEXT_PROPERTIES
2556 Lisp_Object invis_prop
;
2557 invis_prop
= Fget_char_property (make_number (val
.bufpos
- 1),
2558 Qinvisible
, window
);
2559 invis
= TEXT_PROP_MEANS_INVISIBLE (invis_prop
);
2563 /* Next line, unless prev line ended in end of buffer with no cr */
2565 && (FETCH_BYTE (val
.bytepos
- 1) != '\n' || invis
));
2570 /* If last line is continued in middle of character,
2571 include the split character in the text considered on the frame */
2572 if (val
.hpos
< (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
2575 /* If bottom just moved off end of frame, change mode line percentage. */
2576 if (XFASTINT (w
->window_end_pos
) == 0
2578 w
->update_mode_line
= Qt
;
2580 /* Say where last char on frame will be, once redisplay is finished. */
2581 XSETFASTINT (w
->window_end_pos
, Z
- pos
);
2582 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
- XFASTINT (w
->top
));
2583 /* But that is not valid info until redisplay finishes. */
2584 w
->window_end_valid
= Qnil
;
2587 /* Try to redisplay when buffer is modified locally,
2588 computing insert/delete line to preserve text outside
2589 the bounds of the changes.
2590 Return 1 if successful, 0 if if cannot tell what to do,
2591 or -1 to tell caller to find a new window start,
2592 or -2 to tell caller to do normal redisplay with same window start. */
2595 try_window_id (window
)
2599 int opoint
, opoint_byte
;
2600 register struct window
*w
= XWINDOW (window
);
2601 register int height
= window_internal_height (w
);
2602 FRAME_PTR f
= XFRAME (w
->frame
);
2603 int top
= XFASTINT (w
->top
);
2604 int start
= marker_position (w
->start
);
2605 int width
= window_internal_width (w
) - 1;
2606 int hscroll
= XINT (w
->hscroll
);
2607 int lmargin
= hscroll
> 0 ? 1 - hscroll
: 0;
2610 register int i
, tem
;
2611 int last_text_vpos
= 0;
2613 int selective
= (INTEGERP (current_buffer
->selective_display
)
2614 ? XINT (current_buffer
->selective_display
)
2615 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
2616 struct position val
, bp
, ep
, xp
, pp
;
2617 int scroll_amount
= 0;
2621 int start_byte
= marker_byte_position (w
->start
);
2623 if (GPT
- BEG
< beg_unchanged
)
2624 beg_unchanged
= GPT
- BEG
;
2625 if (Z
- GPT
< end_unchanged
)
2626 end_unchanged
= Z
- GPT
;
2628 if (beg_unchanged
+ BEG
< start
)
2629 return 0; /* Give up if changes go above top of window */
2631 /* Find position before which nothing is changed. */
2632 bp
= *compute_motion (start
, 0, lmargin
, 0,
2633 min (ZV
, beg_unchanged
+ BEG
), height
,
2634 /* BUG FIX: See the comment of
2635 Fpos_visible_in_window_p (window.c). */
2636 - (1 << (BITS_PER_SHORT
- 1)),
2638 pos_tab_offset (w
, start
, start_byte
),
2640 if (bp
.vpos
>= height
)
2644 /* All changes are beyond the window end, and point is on the screen.
2645 We don't need to change the text at all.
2646 But we need to update window_end_pos to account for
2647 any change in buffer size. */
2648 bp
= *compute_motion (start
, 0, lmargin
, 0,
2650 /* BUG FIX: See the comment of
2651 Fpos_visible_in_window_p() (window.c). */
2652 - (1 << (BITS_PER_SHORT
- 1)),
2654 pos_tab_offset (w
, start
, start_byte
), w
);
2655 XSETFASTINT (w
->window_end_vpos
, height
);
2656 XSETFASTINT (w
->window_end_pos
, Z
- bp
.bufpos
);
2664 /* Find beginning of that frame line. Must display from there. */
2665 bp
= *vmotion (bp
.bufpos
, 0, w
);
2668 pos_byte
= bp
.bytepos
;
2674 /* If about to start displaying at the beginning of a continuation line,
2675 really start with previous frame line, in case it was not
2676 continued when last redisplayed */
2677 if ((bp
.contin
&& bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0)
2679 /* Likewise if we have to worry about selective display. */
2680 (selective
> 0 && bp
.bufpos
- 1 == beg_unchanged
&& vpos
> 0))
2682 bp
= *vmotion (bp
.bufpos
, -1, w
);
2685 pos_byte
= bp
.bytepos
;
2687 val
.tab_offset
= bp
.tab_offset
; /* Update tab offset. */
2689 if (bp
.contin
&& bp
.hpos
!= lmargin
)
2691 val
.hpos
= bp
.prevhpos
- width
+ lmargin
;
2692 val
.tab_offset
= bp
.tab_offset
+ bp
.prevhpos
- width
;
2694 DEC_BOTH (pos
, pos_byte
);
2699 /* Find first visible newline after which no more is changed. */
2700 opoint
= PT
, opoint_byte
= PT_BYTE
;
2701 SET_PT (Z
- max (end_unchanged
, Z
- ZV
));
2702 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2704 while (PT
< ZV
- 1 && indented_beyond_p (PT
, PT_BYTE
, selective
))
2705 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
2707 SET_PT_BOTH (opoint
, opoint_byte
);
2709 /* Compute the cursor position after that newline. */
2710 ep
= *compute_motion (pos
, vpos
, val
.hpos
, did_motion
, tem
,
2711 height
, - (1 << (BITS_PER_SHORT
- 1)),
2713 /* We have tab offset in VAL, use it. */
2716 /* If changes reach past the text available on the frame,
2717 just display rest of frame. */
2718 if (ep
.bufpos
> Z
- XFASTINT (w
->window_end_pos
))
2721 stop_vpos
= ep
.vpos
;
2723 /* If no newline before ep, the line ep is on includes some changes
2724 that must be displayed. Make sure we don't stop before it. */
2725 /* Also, if changes reach all the way until ep.bufpos,
2726 it is possible that something was deleted after the
2727 newline before it, so the following line must be redrawn. */
2728 if (stop_vpos
== ep
.vpos
2729 && (ep
.bufpos
== BEGV
2730 || FETCH_BYTE (ep
.bytepos
- 1) != '\n'
2731 || ep
.bufpos
== Z
- end_unchanged
))
2732 stop_vpos
= ep
.vpos
+ 1;
2735 overlay_arrow_seen
= 0;
2736 zv_strings_seen
= 0;
2738 /* If changes do not reach to bottom of window,
2739 figure out how much to scroll the rest of the window */
2740 if (stop_vpos
< height
)
2742 /* Now determine how far up or down the rest of the window has moved */
2743 xp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2744 Z
- XFASTINT (w
->window_end_pos
),
2745 /* Don't care for VPOS... */
2746 1 << (BITS_PER_SHORT
- 1),
2748 1 << (BITS_PER_SHORT
- 1),
2749 width
, hscroll
, ep
.tab_offset
, w
);
2750 scroll_amount
= xp
.vpos
- XFASTINT (w
->window_end_vpos
);
2752 /* Is everything on frame below the changes whitespace?
2753 If so, no scrolling is really necessary. */
2754 for (i
= ep
.bytepos
; i
< xp
.bytepos
; i
++)
2756 tem
= FETCH_BYTE (i
);
2757 if (tem
!= ' ' && tem
!= '\n' && tem
!= '\t')
2760 if (i
== xp
.bytepos
)
2763 XSETFASTINT (w
->window_end_vpos
,
2764 XFASTINT (w
->window_end_vpos
) + scroll_amount
);
2766 /* Before doing any scrolling, verify that point will be on frame. */
2767 if (PT
> ep
.bufpos
&& !(PT
<= xp
.bufpos
&& xp
.vpos
< height
))
2769 if (PT
<= xp
.bufpos
)
2771 pp
= *compute_motion (ep
.bufpos
, ep
.vpos
, ep
.hpos
, 1,
2772 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2774 /* We have tab offset in EP, use it. */
2779 pp
= *compute_motion (xp
.bufpos
, xp
.vpos
, xp
.hpos
, 1,
2780 PT
, height
, - (1 << (BITS_PER_SHORT
- 1)),
2782 /* We have tab offset in XP, use it. */
2785 if (pp
.bufpos
< PT
|| pp
.vpos
== height
)
2787 cursor_vpos
= pp
.vpos
+ top
;
2788 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, pp
.hpos
, width
);
2791 if (stop_vpos
- scroll_amount
>= height
2792 || ep
.bufpos
== xp
.bufpos
)
2794 if (scroll_amount
< 0)
2795 stop_vpos
-= scroll_amount
;
2797 /* In this path, we have altered window_end_vpos
2798 and not left it negative.
2799 We must make sure that, in case display is preempted
2800 before the frame changes to reflect what we do here,
2801 further updates will not come to try_window_id
2802 and assume the frame and window_end_vpos match. */
2803 blank_end_of_window
= 1;
2805 else if (!scroll_amount
)
2807 /* Even if we don't need to scroll, we must adjust the
2808 charstarts of subsequent lines (that we won't redisplay)
2809 according to the amount of text inserted or deleted. */
2810 int oldpos
= FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2811 int adjust
= ep
.bufpos
- oldpos
;
2812 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1, adjust
);
2814 else if (bp
.bufpos
== Z
- end_unchanged
)
2816 /* If reprinting everything is nearly as fast as scrolling,
2817 don't bother scrolling. Can happen if lines are short. */
2818 if (scroll_cost (f
, bp
.vpos
+ top
- scroll_amount
,
2819 top
+ height
- max (0, scroll_amount
),
2821 > xp
.bufpos
- bp
.bufpos
- 20)
2822 /* Return "try normal display with same window-start."
2823 Too bad we can't prevent further scroll-thinking. */
2825 /* If pure deletion, scroll up as many lines as possible.
2826 In common case of killing a line, this can save the
2827 following line from being overwritten by scrolling
2828 and therefore having to be redrawn. */
2829 tem
= scroll_frame_lines (f
, bp
.vpos
+ top
- scroll_amount
,
2830 top
+ height
- max (0, scroll_amount
),
2831 scroll_amount
, bp
.bufpos
);
2836 /* scroll_frame_lines did not properly adjust subsequent
2837 lines' charstarts in the case where the text of the
2838 screen line at bp.vpos has changed.
2839 (This can happen in a deletion that ends in mid-line.)
2840 To adjust properly, we need to make things consistent
2842 So do a second adjust to make that happen.
2843 Note that stop_vpos >= ep.vpos, so it is sufficient
2844 to update the charstarts for lines at ep.vpos and below. */
2846 = FRAME_CURRENT_GLYPHS (f
)->charstarts
[ep
.vpos
+ top
][0];
2847 adjust_window_charstarts (w
, ep
.vpos
+ top
- 1,
2848 ep
.bufpos
- oldstart
);
2851 else if (scroll_amount
)
2853 /* If reprinting everything is nearly as fast as scrolling,
2854 don't bother scrolling. Can happen if lines are short. */
2855 /* Note that if scroll_amount > 0, xp.bufpos - bp.bufpos is an
2856 overestimate of cost of reprinting, since xp.bufpos
2857 would end up below the bottom of the window. */
2858 if (scroll_cost (f
, ep
.vpos
+ top
- scroll_amount
,
2859 top
+ height
- max (0, scroll_amount
),
2861 > xp
.bufpos
- ep
.bufpos
- 20)
2862 /* Return "try normal display with same window-start."
2863 Too bad we can't prevent further scroll-thinking. */
2865 tem
= scroll_frame_lines (f
, ep
.vpos
+ top
- scroll_amount
,
2866 top
+ height
- max (0, scroll_amount
),
2867 scroll_amount
, ep
.bufpos
);
2868 if (!tem
) stop_vpos
= height
;
2872 /* In any case, do not display past bottom of window */
2873 if (stop_vpos
>= height
)
2879 /* Handle case where pos is before w->start --
2880 can happen if part of line had been clipped and is not clipped now */
2881 if (vpos
== 0 && pos
< marker_position (w
->start
))
2882 Fset_marker (w
->start
, make_number (pos
), Qnil
);
2884 val
.bytepos
= pos_byte
;
2886 /* Redisplay the lines where the text was changed */
2887 last_text_vpos
= vpos
;
2888 /* The following code is omitted because we maintain tab offset in
2891 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2892 /* If we are starting display in mid-character, correct tab_offset
2893 to account for passing the line that that character really starts in. */
2894 if (val
.hpos
< lmargin
)
2895 tab_offset
+= width
;
2898 while (vpos
< stop_vpos
)
2900 val
= *display_text_line (w
, pos
, val
.bytepos
, top
+ vpos
++,
2901 val
.hpos
, val
.tab_offset
,
2902 val
.ovstring_chars_done
);
2903 /* If display_text_line ran a hook and changed some text,
2904 redisplay all the way to bottom of buffer
2905 So that we show the changes. */
2906 if (old_tick
!= MODIFF
)
2908 /* The following code is omitted because we maintain tab offset
2909 in val.tab_offset. */
2911 tab_offset
+= width
;
2912 if (val
.vpos
) tab_offset
= 0;
2914 if (pos
!= val
.bufpos
)
2916 /* Next line, unless prev line ended in end of buffer with no cr */
2917 = vpos
- (val
.vpos
&& FETCH_BYTE (val
.bytepos
- 1) != '\n');
2921 /* There are two cases:
2922 1) we have displayed down to the bottom of the window
2923 2) we have scrolled lines below stop_vpos by scroll_amount */
2927 /* If last line is continued in middle of character,
2928 include the split character in the text considered on the frame */
2929 if (val
.hpos
< lmargin
)
2931 XSETFASTINT (w
->window_end_vpos
, last_text_vpos
);
2932 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
2935 /* If scrolling made blank lines at window bottom,
2936 redisplay to fill those lines */
2937 if (scroll_amount
< 0)
2939 /* Don't consider these lines for general-purpose scrolling.
2940 That will save time in the scrolling computation. */
2941 FRAME_SCROLL_BOTTOM_VPOS (f
) = xp
.vpos
;
2944 pos_byte
= xp
.bytepos
;
2946 val
.tab_offset
= xp
.tab_offset
;
2948 { /* Display from next line */
2949 vpos
= height
+ scroll_amount
;
2953 else if (xp
.contin
&& xp
.hpos
!= lmargin
)
2955 val
.hpos
= xp
.prevhpos
- width
+ lmargin
;
2956 val
.tab_offset
= xp
.tab_offset
+ bp
.prevhpos
- width
;
2957 DEC_BOTH (pos
, pos_byte
);
2960 blank_end_of_window
= 1;
2961 /* The following code is omitted because we maintain tab offset
2962 in val.tab_offset. */
2964 tab_offset
= pos_tab_offset (w
, pos
, pos_byte
);
2965 /* If we are starting display in mid-character, correct tab_offset
2966 to account for passing the line that that character starts in. */
2967 if (val
.hpos
< lmargin
)
2968 tab_offset
+= width
;
2970 val
.bytepos
= pos_byte
;
2971 while (vpos
< height
)
2973 val
= *display_text_line (w
, pos
, val
.bytepos
,
2974 top
+ vpos
++, val
.hpos
,
2975 val
.tab_offset
, val
.ovstring_chars_done
);
2976 /* The following code is omitted because we maintain tab
2977 offset in val.tab_offset. */
2979 tab_offset
+= width
;
2980 if (val
.vpos
) tab_offset
= 0;
2985 /* Here is a case where display_text_line sets cursor_vpos wrong.
2986 Make it be fixed up, below. */
2992 /* If bottom just moved off end of frame, change mode line percentage. */
2993 if (XFASTINT (w
->window_end_pos
) == 0
2995 w
->update_mode_line
= Qt
;
2997 /* Attempt to adjust end-of-text positions to new bottom line */
3000 delta
= height
- xp
.vpos
;
3002 || (delta
> 0 && xp
.bufpos
<= ZV
)
3003 || (delta
== 0 && xp
.hpos
))
3005 val
= *vmotion (Z
- XFASTINT (w
->window_end_pos
), delta
, w
);
3006 XSETFASTINT (w
->window_end_pos
, Z
- val
.bufpos
);
3007 XSETFASTINT (w
->window_end_vpos
,
3008 XFASTINT (w
->window_end_vpos
) + val
.vpos
);
3012 w
->window_end_valid
= Qnil
;
3014 /* If point was not in a line that was displayed, find it */
3015 if (cursor_vpos
< 0)
3018 val
= *compute_motion (start
, 0, lmargin
, 0, PT
,
3019 /* Don't care for VPOS... */
3020 1 << (BITS_PER_SHORT
- 1),
3022 1 << (BITS_PER_SHORT
- 1),
3024 pos_tab_offset (w
, start
, start_byte
),
3026 /* Admit failure if point is off frame now */
3027 if (val
.vpos
>= height
)
3029 for (vpos
= 0; vpos
< height
; vpos
++)
3030 cancel_line (vpos
+ top
, f
);
3033 cursor_vpos
= val
.vpos
+ top
;
3034 cursor_hpos
= WINDOW_LEFT_MARGIN (w
) + minmax (0, val
.hpos
, width
);
3037 FRAME_CURSOR_X (f
) = cursor_hpos
;
3038 FRAME_CURSOR_Y (f
) = cursor_vpos
;
3042 val
= *compute_motion (start
, 0, lmargin
, 0, ZV
,
3043 height
, - (1 << (BITS_PER_SHORT
- 1)),
3045 pos_tab_offset (w
, start
, start_byte
),
3047 if (val
.vpos
!= XFASTINT (w
->window_end_vpos
))
3049 if (XFASTINT (w
->window_end_pos
)
3057 /* Copy LEN glyphs starting address FROM to the rope TO.
3058 But don't actually copy the parts that would come in before S.
3059 Value is TO, advanced past the copied data.
3060 F is the frame we are displaying in. */
3063 copy_part_of_rope (f
, to
, s
, from
, len
, face
)
3065 register GLYPH
*to
; /* Copy to here. */
3066 register GLYPH
*s
; /* Starting point. */
3067 Lisp_Object
*from
; /* Data to copy. */
3069 int face
; /* Face to apply to glyphs which don't specify one. */
3072 register Lisp_Object
*fp
= from
;
3073 /* These cache the results of the last call to compute_glyph_face. */
3075 int last_merged
= 0;
3078 if (! FRAME_TERMCAP_P (f
))
3081 GLYPH glyph
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3083 unsigned int c
= FAST_GLYPH_CHAR (glyph
);
3086 /* For an invalid character code, use space. */
3089 if (FAST_GLYPH_FACE (glyph
) == 0)
3090 /* If GLYPH has no face code, use FACE. */
3092 else if (FAST_GLYPH_FACE (glyph
) == last_code
)
3093 /* If it's same as previous glyph, use same result. */
3094 facecode
= last_merged
;
3097 /* Merge this glyph's face and remember the result. */
3098 last_code
= FAST_GLYPH_FACE (glyph
);
3099 last_merged
= facecode
= compute_glyph_face (f
, last_code
, face
);
3103 *to
= FAST_MAKE_GLYPH (c
, facecode
);
3111 if (to
>= s
) *to
= (INTEGERP (*fp
) ? XFASTINT (*fp
) : 0);
3118 /* Correct a glyph by replacing its specified user-level face code
3119 with a displayable computed face code. */
3122 fix_glyph (f
, glyph
, cface
)
3128 if (! FRAME_TERMCAP_P (f
))
3130 if (FAST_GLYPH_FACE (glyph
) != 0)
3131 cface
= compute_glyph_face (f
, FAST_GLYPH_FACE (glyph
), cface
);
3132 glyph
= FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (glyph
), cface
);
3138 /* Return the column of position POS / POS_BYTE in window W's buffer.
3139 When used on the character at the beginning of a line,
3140 starting at column 0, this says how much to subtract from
3141 the column position of any character in the line
3142 to get its horizontal position on the screen. */
3145 pos_tab_offset (w
, pos
, pos_byte
)
3147 register int pos
, pos_byte
;
3150 int opoint_byte
= PT_BYTE
;
3152 int width
= window_internal_width (w
) - 1;
3155 return MINI_WINDOW_P (w
) ? -minibuf_prompt_width
: 0;
3157 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3160 TEMP_SET_PT_BOTH (pos
, pos_byte
);
3161 col
= current_column ();
3162 TEMP_SET_PT_BOTH (opoint
, opoint_byte
);
3167 /* Display one line of window W, starting at char position START in W's buffer.
3168 START_BYTE is the corresponding byte position.
3170 Display starting at horizontal position HPOS, expressed relative to
3171 W's left edge. In situations where the text at START shouldn't
3172 start at the left margin (i.e. when the window is hscrolled, or
3173 we're continuing a line which left off in the midst of a
3174 multi-column character), HPOS should be negative; we throw away
3175 characters up 'til hpos = 0. So, HPOS must take hscrolling into
3178 TABOFFSET is an offset for ostensible hpos, used in tab stop calculations.
3180 OVSTR_DONE is the number of chars of overlay before/after strings
3181 at this position which have already been processed.
3183 Display on position VPOS on the frame. It is origin 0, relative to
3184 the top of the frame, not W.
3186 Returns a STRUCT POSITION giving character to start next line with
3187 and where to display it, including a zero or negative hpos.
3188 The vpos field is not really a vpos; it is 1 unless the line is continued */
3190 struct position val_display_text_line
;
3192 static struct position
*
3193 display_text_line (w
, start
, start_byte
, vpos
, hpos
, taboffset
, ovstr_done
)
3201 register int pos
= start
;
3202 int pos_byte
= start_byte
;
3205 int pause
, limit_byte
;
3206 register unsigned char *p
;
3208 register GLYPH
*leftmargin
;
3209 register GLYPH
*p1prev
;
3210 register GLYPH
*p1start
;
3211 GLYPH
*p1_wide_column_end
= (GLYPH
*) 0;
3212 int prevpos
, prevpos_byte
;
3214 FRAME_PTR f
= XFRAME (w
->frame
);
3215 int tab_width
= XINT (current_buffer
->tab_width
);
3216 int ctl_arrow
= !NILP (current_buffer
->ctl_arrow
);
3217 int width
= window_internal_width (w
) - 1;
3218 struct position val
;
3219 int lastpos
, lastpos_byte
;
3221 int last_invis_skip
= 0;
3222 Lisp_Object last_invis_prop
;
3223 int hscroll
= XINT (w
->hscroll
);
3224 int truncate
= (hscroll
3225 || (truncate_partial_width_windows
3226 && !WINDOW_FULL_WIDTH_P (w
))
3227 || !NILP (current_buffer
->truncate_lines
));
3229 /* 1 if this buffer has a region to highlight. */
3230 int highlight_region
3231 = (!NILP (Vtransient_mark_mode
) && !NILP (current_buffer
->mark_active
)
3232 && XMARKER (current_buffer
->mark
)->buffer
!= 0);
3233 int region_beg
, region_end
;
3235 int selective
= (INTEGERP (current_buffer
->selective_display
)
3236 ? XINT (current_buffer
->selective_display
)
3237 : !NILP (current_buffer
->selective_display
) ? -1 : 0);
3238 register struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
3239 register struct Lisp_Char_Table
*dp
= window_display_table (w
);
3241 Lisp_Object default_invis_vector
[3];
3242 /* Number of characters of ellipsis to display after an invisible line
3243 if it calls for an ellipsis.
3244 Note that this value can be nonzero regardless of whether
3245 selective display is enabled--you must check that separately. */
3247 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3248 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->size
3249 : !NILP (current_buffer
->selective_display_ellipses
) ? 3 : 0);
3250 /* This is the sequence of Lisp objects to display
3251 when there are invisible lines. */
3252 Lisp_Object
*invis_vector_contents
3253 = (dp
&& VECTORP (DISP_INVIS_VECTOR (dp
))
3254 ? XVECTOR (DISP_INVIS_VECTOR (dp
))->contents
3255 : default_invis_vector
);
3257 GLYPH truncator
= (dp
== 0 || !INTEGERP (DISP_TRUNC_GLYPH (dp
))
3258 || !GLYPH_CHAR_VALID_P (XINT (DISP_TRUNC_GLYPH (dp
)))
3259 ? '$' : XINT (DISP_TRUNC_GLYPH (dp
)));
3260 GLYPH continuer
= (dp
== 0 || !INTEGERP (DISP_CONTINUE_GLYPH (dp
))
3261 || !GLYPH_CHAR_VALID_P (XINT (DISP_CONTINUE_GLYPH (dp
)))
3262 ? '\\' : XINT (DISP_CONTINUE_GLYPH (dp
)));
3264 /* If 1, we must handle multibyte characters. */
3265 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
3266 /* Length of multibyte form of each character. */
3268 /* Glyphs generated should be set this bit mask if text must be
3269 displayed from right to left. */
3270 GLYPH rev_dir_bit
= (NILP (current_buffer
->direction_reversed
)
3271 ? 0 : GLYPH_MASK_REV_DIR
);
3273 /* The next buffer location at which the face should change, due
3274 to overlays or text property changes. */
3275 int next_face_change
;
3277 /* The next location where the `invisible' property changes, or an
3278 overlay starts or ends. */
3281 /* The face we're currently using. */
3282 int current_face
= 0;
3285 XSETFASTINT (default_invis_vector
[2], '.');
3286 default_invis_vector
[0] = default_invis_vector
[1] = default_invis_vector
[2];
3288 get_display_line (f
, vpos
, WINDOW_LEFT_MARGIN (w
));
3289 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
3291 /* Show where to highlight the region. */
3292 if (highlight_region
3293 /* Maybe highlight only in selected window. */
3294 && (highlight_nonselected_windows
3295 || w
== XWINDOW (selected_window
)
3296 || (MINI_WINDOW_P (XWINDOW (selected_window
))
3297 && w
== XWINDOW (Vminibuf_scroll_window
))))
3299 region_beg
= marker_position (current_buffer
->mark
);
3300 if (PT
< region_beg
)
3302 region_end
= region_beg
;
3307 w
->region_showing
= Qt
;
3311 region_beg
= region_end
= -1;
3312 w
->region_showing
= Qnil
;
3315 if (MINI_WINDOW_P (w
)
3317 && vpos
== XFASTINT (w
->top
))
3319 if (! NILP (minibuf_prompt
))
3321 int old_width
= minibuf_prompt_width
;
3323 minibuf_prompt_width
3324 = (display_string (w
, vpos
, XSTRING (minibuf_prompt
)->data
,
3325 STRING_BYTES (XSTRING (minibuf_prompt
)),
3326 hpos
+ WINDOW_LEFT_MARGIN (w
),
3327 /* Display a space if we truncate. */
3330 /* Truncate the prompt a little before the
3331 margin, so user input can at least start
3332 on the first line. */
3333 (XFASTINT (w
->width
) > 10
3334 ? XFASTINT (w
->width
) - 4 : -1),
3335 STRING_MULTIBYTE (minibuf_prompt
))
3336 - hpos
- WINDOW_LEFT_MARGIN (w
));
3337 hpos
+= minibuf_prompt_width
;
3338 taboffset
-= minibuf_prompt_width
- old_width
;
3341 minibuf_prompt_width
= 0;
3344 /* If we're hscrolled at all, use compute_motion to skip over any
3345 text off the left edge of the window. compute_motion may know
3346 tricks to do this faster than we can. */
3349 struct position
*left_edge
3350 = compute_motion (pos
, vpos
, hpos
, 0,
3352 width
, hscroll
, taboffset
, w
);
3354 /* Retrieve the buffer position and column provided by
3355 compute_motion. We can't assume that the column will be
3356 zero, because you may have multi-column characters crossing
3359 compute_motion may have moved us past the screen position we
3360 requested, if we hit a multi-column character, or the end of
3361 the line. If so, back up. */
3362 if (left_edge
->vpos
> vpos
3363 || left_edge
->hpos
> 0)
3365 pos
= left_edge
->bufpos
;
3366 pos_byte
= left_edge
->bytepos
;
3367 DEC_BOTH (pos
, pos_byte
);
3368 hpos
= left_edge
->prevhpos
;
3372 pos
= left_edge
->bufpos
;
3373 pos_byte
= left_edge
->bytepos
;
3374 hpos
= left_edge
->hpos
;
3378 hpos
+= WINDOW_LEFT_MARGIN (w
);
3380 desired_glyphs
->bufp
[vpos
] = start
;
3381 p1
= desired_glyphs
->glyphs
[vpos
] + hpos
;
3383 charstart
= desired_glyphs
->charstarts
[vpos
] + hpos
;
3384 /* In case we don't ever write anything into it... */
3385 desired_glyphs
->charstarts
[vpos
][WINDOW_LEFT_MARGIN (w
)] = -1;
3386 leftmargin
= desired_glyphs
->glyphs
[vpos
] + WINDOW_LEFT_MARGIN (w
);
3387 endp
= leftmargin
+ width
;
3389 /* Arrange the overlays nicely for our purposes. Usually, we call
3390 display_text_line on only one line at a time, in which case this
3391 can't really hurt too much, or we call it on lines which appear
3392 one after another in the buffer, in which case all calls to
3393 recenter_overlay_lists but the first will be pretty cheap. */
3394 recenter_overlay_lists (current_buffer
, pos
);
3396 /* Loop generating characters.
3397 Stop at end of buffer, before newline,
3398 if reach or pass continuation column,
3399 or at face change. */
3401 limit_byte
= pos_byte
;
3402 next_face_change
= pos
;
3403 next_boundary
= pos
;
3406 prevpos_byte
= pos_byte
;
3408 /* If the window is hscrolled and point is in the invisible part of the
3409 current line beyond the left margin we can record the cursor location
3411 if (hscroll
&& start
<= PT
&& PT
< pos
&& cursor_vpos
< 0)
3414 cursor_hpos
= p1
- leftmargin
;
3423 while (pos
== next_boundary
)
3425 Lisp_Object position
, limit
, prop
, ww
;
3427 /* Display the overlay strings here, unless we're at ZV
3428 and have already displayed the appropriate strings
3429 on an earlier line. */
3430 if (pos
< ZV
|| !zv_strings_seen
++)
3433 unsigned char *ovstr
;
3434 ovlen
= overlay_strings (pos
, w
, &ovstr
);
3438 /* Skip the ones we did in a previous line. */
3439 ovstr
+= ovstr_done
;
3440 ovlen
-= ovstr_done
;
3449 c
= STRING_CHAR_AND_LENGTH (ovstr
, ovlen
, len
);
3450 ovstr
+= len
, ovlen
-= len
, ovstr_done
+= len
;
3451 charset
= CHAR_CHARSET (c
);
3452 cols
= (charset
== CHARSET_COMPOSITION
3453 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3454 : CHARSET_WIDTH (charset
));
3458 c
= *ovstr
++, ovlen
--, ovstr_done
++;
3461 g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3464 if (p1
>= leftmargin
&& p1
< endp
)
3465 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3469 /* If we did all the overlay strings
3470 and we have room for text, clear ovstr_done
3471 just for neatness' sake. */
3472 if (ovlen
== 0 && p1
< endp
)
3477 /* Did we reach point? Record the cursor location. */
3478 if (pos
== PT
&& cursor_vpos
< 0)
3481 cursor_hpos
= p1
- leftmargin
;
3487 XSETFASTINT (position
, pos
);
3488 limit
= Fnext_overlay_change (position
);
3489 #ifdef USE_TEXT_PROPERTIES
3490 /* This is just an estimate to give reasonable
3491 performance; nothing should go wrong if it is too small. */
3492 if (XFASTINT (limit
) > pos
+ 50)
3494 int limitpos
= pos
+ 50;
3495 XSETFASTINT (limit
, limitpos
);
3497 limit
= Fnext_single_property_change (position
, Qinvisible
,
3498 Fcurrent_buffer (), limit
);
3500 next_boundary
= XFASTINT (limit
);
3501 /* if the `invisible' property is set, we can skip to
3502 the next property change. */
3504 prop
= Fget_char_property (position
, Qinvisible
, ww
);
3505 if (TEXT_PROP_MEANS_INVISIBLE (prop
))
3507 if (pos
< PT
&& next_boundary
>= PT
)
3510 cursor_hpos
= p1
- leftmargin
;
3512 pos
= next_boundary
;
3513 pos_byte
= CHAR_TO_BYTE (pos
);
3514 last_invis_skip
= pos
;
3515 last_invis_prop
= prop
;
3519 /* Did we reach point? Record the cursor location. */
3520 if (pos
== PT
&& cursor_vpos
< 0)
3523 cursor_hpos
= p1
- leftmargin
;
3526 /* Did we hit the end of the visible region of the buffer?
3530 /* Update charstarts for the end of this line. */
3531 /* Do nothing if off the left edge or at the right edge. */
3532 if (p1
>= leftmargin
&& p1
+ 1 != endp
)
3534 int *p2x
= &charstart
[(p1
< leftmargin
3542 /* Figure out where (if at all) the
3543 redisplay_end_trigger-hook should run. */
3544 if (MARKERP (w
->redisplay_end_trigger
)
3545 && XMARKER (w
->redisplay_end_trigger
)->buffer
!= 0)
3546 e_t_h
= marker_position (w
->redisplay_end_trigger
);
3547 else if (INTEGERP (w
->redisplay_end_trigger
))
3548 e_t_h
= XINT (w
->redisplay_end_trigger
);
3552 /* If we've gone past the place to run a hook,
3554 if (pos
>= e_t_h
&& e_t_h
!= ZV
)
3556 Lisp_Object args
[3];
3558 args
[0] = Qredisplay_end_trigger_functions
;
3559 XSETWINDOW (args
[1], w
);
3560 XSETINT (args
[2], e_t_h
);
3562 /* Since we are *trying* to run these functions,
3563 don't try to run them again, even if they get an error. */
3564 w
->redisplay_end_trigger
= Qnil
;
3565 Frun_hook_with_args (3, args
);
3568 /* Notice if it changed the face of this character. */
3569 next_face_change
= pos
;
3573 /* Did we hit a face change? Figure out what face we should
3574 use now. We also hit this the first time through the
3575 loop, to see what face we should start with. */
3576 if (pos
>= next_face_change
3577 && (FRAME_WINDOW_P (f
) || FRAME_MSDOS_P (f
)))
3579 int limit
= pos
+ 50;
3581 current_face
= compute_char_face (f
, w
, pos
,
3582 region_beg
, region_end
,
3583 &next_face_change
, limit
, 0);
3587 /* Compute the next place we need to stop
3588 and do something special; set PAUSE. */
3592 if (pos
< next_boundary
&& next_boundary
< pause
)
3593 pause
= next_boundary
;
3594 if (pos
< next_face_change
&& next_face_change
< pause
)
3595 pause
= next_face_change
;
3600 /* Wouldn't you hate to read the next line to someone over
3602 if (pos
< PT
&& PT
< pause
)
3604 if (pos
< GPT
&& GPT
< pause
)
3607 /* LIMIT_BYTE is not the same place in the buffer as PAUSE.
3608 It is a limit on valid characters.
3609 We use it to bound STRING_CHAR_AND_LENGTH. */
3610 limit_byte
= ZV_BYTE
;
3611 if (pos
< GPT
&& GPT_BYTE
< limit_byte
)
3612 limit_byte
= GPT_BYTE
;
3615 int temp
= CHAR_TO_BYTE (pos
);
3616 p
= BYTE_POS_ADDR (temp
);
3624 p1_wide_column_end
= (GLYPH
*) 0;
3627 c
= STRING_CHAR_AND_LENGTH (p
, limit_byte
- pos_byte
, len
), p
+= len
;
3630 /* Let a display table override all standard display methods. */
3631 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
3633 p1
= copy_part_of_rope (f
, p1
, leftmargin
,
3634 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
3635 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
3636 current_face
, rev_dir_bit
);
3638 else if (c
>= 040 && c
< 0177)
3640 if (p1
>= leftmargin
)
3641 *p1
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3647 /* Same as p1prev, but after the invis_vector_contents text
3648 (if we have that on this line). */
3649 GLYPH
*p1prev_modified
;
3653 if (last_invis_skip
== pos
3654 && TEXT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS (last_invis_prop
))
3658 && indented_beyond_p (pos
+ 1, pos_byte
+ 1, selective
))
3660 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3663 INC_BOTH (pos
, pos_byte
);
3664 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3665 pos
= PT
, pos_byte
= PT_BYTE
;
3666 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3671 SET_PT_BOTH (opoint
, opoint_byte
);
3673 if (invis
&& selective_rlen
> 0 && p1
>= leftmargin
)
3678 cs
= charstart
+ (p1
- p1start
);
3681 p1
+= selective_rlen
;
3682 if (p1
- leftmargin
> width
)
3685 #if 0 /* This needs more work; charstarts needs to record
3686 both whether a position ho;ds an ellipsis character
3687 and what buffer position it corresponds to. */
3688 csend
= charstart
+ (p1
- p1start
);
3691 /* The idea is to use p1prev_modified instead of p1prev
3692 in the loop below over p2x. */
3693 p1prev_modified
= p1
;
3696 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3697 (p1
- p1prev
), current_face
, rev_dir_bit
);
3700 /* Update charstarts for the newline that ended this line. */
3701 /* Do nothing here for a char that's entirely off the left edge
3702 or if it starts at the right edge. */
3703 if (p1
>= leftmargin
&& p1prev
!= endp
)
3705 /* Store the newline's position into charstarts
3706 for the column where the newline starts.
3707 Store -1 for the rest of the glyphs it occupies. */
3708 int *p2x
= &charstart
[(p1prev
< leftmargin
3709 ? leftmargin
: p1prev
)
3711 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3718 /* Draw the face of the newline character as extending all the
3719 way to the end of the frame line. */
3722 if (p1
< leftmargin
)
3725 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3735 if (p1
>= leftmargin
&& p1
< endp
)
3736 *p1
= MAKE_GLYPH (f
, ' ', current_face
) | rev_dir_bit
;
3739 while ((p1
- leftmargin
+ taboffset
+ hscroll
- (hscroll
> 0))
3742 else if (c
== Ctl ('M') && selective
== -1)
3744 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3745 scan_newline (pos
, pos_byte
, ZV
, ZV_BYTE
, 1, 1);
3746 pos
= PT
, pos_byte
= PT_BYTE
;
3747 SET_PT_BOTH (opoint
, opoint_byte
);
3749 if (FETCH_BYTE (pos_byte
- 1) == '\n')
3751 if (selective_rlen
> 0)
3753 p1
+= selective_rlen
;
3754 if (p1
- leftmargin
> width
)
3756 copy_part_of_rope (f
, p1prev
, p1prev
, invis_vector_contents
,
3757 (p1
- p1prev
), current_face
, rev_dir_bit
);
3760 /* Draw the face of the newline character as extending all the
3761 way to the end of the frame line. */
3764 if (p1
< leftmargin
)
3767 *p1
++ = FAST_MAKE_GLYPH (' ', current_face
) | rev_dir_bit
;
3771 /* Update charstarts for the ^M that ended this line. */
3772 /* Do nothing here for a char that's entirely off the left edge
3773 or if it starts at the right edge. */
3774 if (p1
>= leftmargin
&& p1prev
!= endp
)
3776 /* Store the newline's position into charstarts
3777 for the column where the newline starts.
3778 Store -1 for the rest of the glyphs it occupies. */
3779 int *p2x
= &charstart
[(p1prev
< leftmargin
3780 ? leftmargin
: p1prev
)
3782 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3790 else if (c
< 0200 && ctl_arrow
)
3792 if (p1
>= leftmargin
)
3794 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
3795 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
3796 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
3800 if (p1
>= leftmargin
&& p1
< endp
)
3801 *p1
= MAKE_GLYPH (f
, c
^ 0100, current_face
) | rev_dir_bit
;
3806 /* C is a multibyte character or a character to be displayed
3808 int remaining_bytes
= len
;
3812 /* C is a multibyte character. */
3813 int charset
= CHAR_CHARSET (c
);
3814 int columns
= (charset
== CHARSET_COMPOSITION
3815 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
3816 : CHARSET_WIDTH (charset
));
3817 GLYPH g
= MAKE_GLYPH (f
, c
, current_face
) | rev_dir_bit
;
3821 if (p1
>= leftmargin
&& p1
< endp
)
3822 *p1
= g
, g
|= GLYPH_MASK_PADDING
;
3825 p1_wide_column_end
= p1
;
3826 remaining_bytes
-= CHARSET_BYTES (charset
);
3829 while (remaining_bytes
> 0)
3831 c
= *(p
- remaining_bytes
--);
3833 if (p1
>= leftmargin
&& p1
< endp
)
3836 (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
3837 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
3838 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
3842 if (p1
>= leftmargin
&& p1
< endp
)
3843 *p1
= (MAKE_GLYPH (f
, (c
>> 6) + '0', current_face
)
3846 if (p1
>= leftmargin
&& p1
< endp
)
3847 *p1
= (MAKE_GLYPH (f
, (7 & (c
>> 3)) + '0', current_face
)
3850 if (p1
>= leftmargin
&& p1
< endp
)
3851 *p1
= (MAKE_GLYPH (f
, (7 & c
) + '0', current_face
)
3858 prevpos_byte
= pos_byte
;
3862 /* Update charstarts for the character just output. */
3864 /* Do nothing here for a char that's entirely off the left edge. */
3865 if (p1
>= leftmargin
)
3867 /* Store the char's position into charstarts
3868 for the first glyph occupied by this char.
3869 Store -1 for the rest of the glyphs it occupies. */
3872 int *p2x
= &charstart
[(p1prev
< leftmargin
3873 ? leftmargin
: p1prev
)
3875 int *p2
= &charstart
[(p1
< endp
? p1
: endp
) - p1start
];
3885 val
.hpos
= - XINT (w
->hscroll
);
3892 lastpos_byte
= pos_byte
;
3894 /* Store 0 in this charstart line for the positions where
3895 there is no character. But do leave what was recorded
3896 for the character that ended the line. */
3897 /* Add 1 in the endtest to compensate for the fact that ENDP was
3898 made from WIDTH, which is 1 less than the window's actual
3900 i
= p1
- p1start
+ 1;
3901 if (p1
< leftmargin
)
3902 i
+= leftmargin
- p1
;
3903 for (; i
< endp
- p1start
+ 1; i
++)
3906 /* Handle continuation in middle of a character */
3907 /* by backing up over it */
3910 /* Don't back up if we never actually displayed any text.
3911 This occurs when the minibuffer prompt takes up the whole line. */
3914 /* Start the next line with that same character whose
3915 character code is C and the length of multi-byte form is
3918 pos_byte
= prevpos_byte
;
3920 if (p1_wide_column_end
< endp
)
3921 /* As ENDP is not in the middle of wide-column character,
3922 we can break the line at ENDP and start from the middle
3923 column in the next line. So, adjust VAL.HPOS to skip
3924 the columns output on this line. */
3925 val
.hpos
+= p1prev
- endp
;
3928 /* We displayed a wide-column character at around ENDP.
3929 Since we can't broke it in the middle, the whole
3930 character should be driven into the next line. */
3931 /* As the result, the actual columns occupied by the
3932 text on this line is less than WIDTH. VAL.TAB_OFFSET
3933 must be adjusted. */
3934 taboffset
= taboffset
+ (p1prev
- endp
);
3935 /* Let's fill unused columns with TRUNCATOR or CONTINUER. */
3937 GLYPH g
= fix_glyph (f
, truncate
? truncator
: continuer
, 0);
3938 while (p1prev
< endp
)
3941 /* If POINT is at POS, cursor should not on this line. */
3943 lastpos_byte
= pos_byte
;
3949 /* Keep in this line everything up to the continuation column. */
3953 /* Finish deciding which character to start the next line on,
3954 and what hpos to start it at.
3955 Also set `lastpos' to the last position which counts as "on this line"
3956 for cursor-positioning. */
3960 if (FETCH_BYTE (pos_byte
) == '\n')
3962 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3964 /* If stopped due to a newline, start next line after it */
3965 SET_PT_BOTH (pos
+ 1, pos_byte
+ 1);
3968 /* Check again for hidden lines, in case the newline occurred exactly
3969 at the right margin. */
3970 while (PT
< ZV
&& selective
> 0
3971 && indented_beyond_p (PT
, PT_BYTE
, selective
))
3972 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3974 pos
= PT
, pos_byte
= PT_BYTE
;
3975 SET_PT_BOTH (opoint
, opoint_byte
);
3978 /* Stopped due to right margin of window */
3982 int opoint
= PT
, opoint_byte
= PT_BYTE
;
3984 SET_PT_BOTH (pos
, pos_byte
);
3985 *p1
++ = fix_glyph (f
, truncator
, 0);
3986 /* Truncating => start next line after next newline,
3987 and point is on this line if it is before the newline,
3988 and skip none of first char of next line */
3990 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 1);
3991 while (PT
< ZV
&& selective
> 0
3992 && indented_beyond_p (PT
, PT_BYTE
, selective
));
3993 pos
= PT
, pos_byte
= PT_BYTE
;
3994 val
.hpos
= XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0;
3995 SET_PT_BOTH (opoint
, opoint_byte
);
3997 lastpos
= pos
- (FETCH_BYTE (pos_byte
- 1) == '\n');
3998 lastpos_byte
= CHAR_TO_BYTE (lastpos
);
4003 *p1
++ = fix_glyph (f
, continuer
, 0);
4005 DEC_BOTH (lastpos
, lastpos_byte
);
4006 val
.tab_offset
= taboffset
+ width
;
4013 /* If point is at eol or in invisible text at eol,
4014 record its frame location now. */
4016 if (start
<= PT
&& PT
<= lastpos
&& cursor_vpos
< 0)
4019 cursor_hpos
= p1
- leftmargin
;
4022 if (cursor_vpos
== vpos
)
4024 if (cursor_hpos
< 0) cursor_hpos
= 0;
4025 if (cursor_hpos
> width
) cursor_hpos
= width
;
4026 cursor_hpos
+= WINDOW_LEFT_MARGIN (w
);
4027 if (w
== XWINDOW (FRAME_SELECTED_WINDOW (f
)))
4029 this_line_bufpos
= 0;
4031 /* If this frame's cursor will be in its echo area,
4032 don't record a cursor from the window text,
4033 and turn off the optimization for cursor-motion-only case. */
4034 if (!(cursor_in_echo_area
&& FRAME_HAS_MINIBUF_P (f
)
4035 && EQ (FRAME_MINIBUF_WINDOW (f
), minibuf_window
)))
4037 FRAME_CURSOR_Y (f
) = cursor_vpos
;
4038 FRAME_CURSOR_X (f
) = cursor_hpos
;
4040 if (w
== XWINDOW (selected_window
))
4042 /* Line is not continued and did not start
4043 in middle of character */
4044 if ((hpos
- WINDOW_LEFT_MARGIN (w
)
4045 == (XINT (w
->hscroll
) ? 1 - XINT (w
->hscroll
) : 0))
4048 this_line_bufpos
= start
;
4049 this_line_buffer
= current_buffer
;
4050 this_line_vpos
= cursor_vpos
;
4051 this_line_start_hpos
= hpos
- WINDOW_LEFT_MARGIN (w
);
4052 this_line_endpos
= Z
- lastpos
;
4059 /* If hscroll and line not empty, insert truncation-at-left marker */
4060 if (hscroll
&& lastpos
!= start
)
4062 GLYPH g
= fix_glyph (f
, truncator
, 0);
4064 if (p1
<= leftmargin
)
4065 p1
= leftmargin
+ 1;
4066 else /* MULE: it may be a wide-column character */
4068 p1prev
= leftmargin
+ 1;
4069 while (p1prev
< p1
&& *p1prev
& GLYPH_MASK_PADDING
)
4074 if (!WINDOW_RIGHTMOST_P (w
))
4077 if (p1
< leftmargin
) p1
= leftmargin
;
4078 while (p1
< endp
) *p1
++ = SPACEGLYPH
;
4080 /* Don't draw vertical bars if we're using scroll bars. They're
4081 covered up by the scroll bars, and it's distracting to see
4082 them when the scroll bar windows are flickering around to be
4084 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
4087 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
4090 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
4091 *p1
++ = (dp
&& INTEGERP (DISP_BORDER_GLYPH (dp
))
4092 ? XINT (DISP_BORDER_GLYPH (dp
))
4095 desired_glyphs
->used
[vpos
] = max (desired_glyphs
->used
[vpos
],
4096 p1
- desired_glyphs
->glyphs
[vpos
]);
4097 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
4099 /* If the start of this line is the overlay arrow-position,
4100 then put the arrow string into the display-line. */
4102 if (MARKERP (Voverlay_arrow_position
)
4103 && current_buffer
== XMARKER (Voverlay_arrow_position
)->buffer
4104 && start
== marker_position (Voverlay_arrow_position
)
4105 && STRINGP (Voverlay_arrow_string
)
4106 && ! overlay_arrow_seen
)
4109 int len
= XSTRING (Voverlay_arrow_string
)->size
;
4115 /* If the arrow string has text props, obey them when displaying. */
4116 for (i
= 0, i_byte
= 0; i
< len
; )
4119 Lisp_Object face
, ilisp
;
4123 if (STRING_MULTIBYTE (Voverlay_arrow_string
))
4124 FETCH_STRING_CHAR_ADVANCE (c
, Voverlay_arrow_string
, i
, i_byte
);
4126 c
= XSTRING (Voverlay_arrow_string
)->data
[i
++];
4128 XSETFASTINT (ilisp
, i
);
4130 if (FRAME_WINDOW_P (f
))
4132 face
= Fget_text_property (ilisp
, Qface
, Voverlay_arrow_string
);
4133 newface
= compute_glyph_face_1 (f
, face
, 0);
4134 c
= FAST_MAKE_GLYPH (c
, newface
);
4136 #endif /* HAVE_FACES */
4137 leftmargin
[idx
] = c
;
4140 /* Bug in SunOS 4.1.1 compiler requires this intermediate variable. */
4141 arrow_end
= (leftmargin
- desired_glyphs
->glyphs
[vpos
]) + len
;
4142 if (desired_glyphs
->used
[vpos
] < arrow_end
)
4143 desired_glyphs
->used
[vpos
] = arrow_end
;
4145 overlay_arrow_seen
= 1;
4149 val
.bytepos
= pos_byte
;
4150 val
.ovstring_chars_done
= ovstr_done
;
4151 val_display_text_line
= val
;
4152 return &val_display_text_line
;
4155 /* Redisplay the menu bar in the frame for window W. */
4158 display_menu_bar (w
)
4161 Lisp_Object items
, tail
;
4162 register int vpos
= 0;
4163 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4164 int maxendcol
= FRAME_WIDTH (f
);
4169 if (!NILP (Vwindow_system
))
4173 #ifdef USE_X_TOOLKIT
4176 #endif /* USE_X_TOOLKIT */
4178 get_display_line (f
, vpos
, 0);
4180 items
= FRAME_MENU_BAR_ITEMS (f
);
4181 for (i
= 0; i
< XVECTOR (items
)->size
; i
+= 4)
4183 Lisp_Object pos
, string
;
4184 string
= XVECTOR (items
)->contents
[i
+ 1];
4188 XSETFASTINT (XVECTOR (items
)->contents
[i
+ 3], hpos
);
4190 if (hpos
< maxendcol
)
4191 hpos
= display_string (w
, vpos
,
4192 XSTRING (string
)->data
,
4193 STRING_BYTES (XSTRING (string
)),
4194 hpos
, 0, 0, hpos
, maxendcol
,
4195 STRING_MULTIBYTE (string
));
4196 /* Put a space between items. */
4197 if (hpos
< maxendcol
)
4199 int hpos1
= hpos
+ 1;
4200 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0,
4201 min (hpos1
, maxendcol
), maxendcol
, 0);
4205 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4206 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4208 /* Fill out the line with spaces. */
4209 if (maxendcol
> hpos
)
4210 hpos
= display_string (w
, vpos
, "", 0, hpos
, 0, 0, maxendcol
, maxendcol
, 0);
4212 /* Clear the rest of the lines allocated to the menu bar. */
4214 while (vpos
< FRAME_MENU_BAR_LINES (f
))
4215 get_display_line (f
, vpos
++, 0);
4218 /* Display the mode line for window w */
4221 display_mode_line (w
)
4224 register int vpos
= XFASTINT (w
->height
) + XFASTINT (w
->top
) - 1;
4225 register int left
= WINDOW_LEFT_MARGIN (w
);
4226 register int right
= WINDOW_RIGHT_MARGIN (w
);
4227 register FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4229 line_number_displayed
= 0;
4230 w
->column_number_displayed
= Qnil
;
4232 get_display_line (f
, vpos
, left
);
4234 /* Temporarily make frame F's kboard the current kboard
4235 so that kboard-local variables in the mode_line_format
4236 will get the right values. */
4237 push_frame_kboard (f
);
4239 display_mode_element (w
, vpos
, left
, 0, right
, right
,
4240 current_buffer
->mode_line_format
);
4242 pop_frame_kboard ();
4244 FRAME_DESIRED_GLYPHS (f
)->bufp
[vpos
] = 0;
4246 /* Put the mode line in inverse video.
4247 Use faces if possible, since that lets us handle
4248 partial-width windows and avoid inverting the scroll bar columns. */
4250 if (! FRAME_TERMCAP_P (f
) && mode_line_inverse_video
)
4252 /* For a partial width window, explicitly set face of each glyph. */
4254 unsigned int padding
;
4255 GLYPH
*ptr
= FRAME_DESIRED_GLYPHS (f
)->glyphs
[vpos
];
4256 for (i
= left
; i
< right
; ++i
)
4258 padding
= ptr
[i
] & GLYPH_MASK_PADDING
;
4259 ptr
[i
] = FAST_MAKE_GLYPH (FAST_GLYPH_CHAR (ptr
[i
]), 1) | padding
;
4265 /* Make the mode line inverse video if the entire line
4266 is made of mode lines.
4267 I.e. if this window is full width,
4268 or if it is the child of a full width window
4269 (which implies that that window is split side-by-side
4270 and the rest of this line is mode lines of the sibling windows). */
4271 if (WINDOW_FULL_WIDTH_P (w
)
4272 || WINDOW_FULL_WIDTH_P (XWINDOW (w
->parent
)))
4273 FRAME_DESIRED_GLYPHS (f
)->highlight
[vpos
] = mode_line_inverse_video
;
4276 /* Contribute ELT to the mode line for window W.
4277 How it translates into text depends on its data type.
4279 VPOS is the position of the mode line being displayed.
4281 HPOS is the position (absolute on frame) where this element's text
4282 should start. The output is truncated automatically at the right
4285 DEPTH is the depth in recursion. It is used to prevent
4286 infinite recursion here.
4288 MINENDCOL is the hpos before which the element may not end.
4289 The element is padded at the right with spaces if nec
4290 to reach this column.
4292 MAXENDCOL is the hpos past which this element may not extend.
4293 If MINENDCOL is > MAXENDCOL, MINENDCOL takes priority.
4294 (This is necessary to make nested padding and truncation work.)
4296 Returns the hpos of the end of the text generated by ELT.
4297 The next element will receive that value as its HPOS arg,
4298 so as to concatenate the elements. */
4301 display_mode_element (w
, vpos
, hpos
, depth
, minendcol
, maxendcol
, elt
)
4303 register int vpos
, hpos
;
4306 register int maxendcol
;
4307 register Lisp_Object elt
;
4315 switch (SWITCH_ENUM_CAST (XTYPE (elt
)))
4319 /* A string: output it and check for %-constructs within it. */
4320 register unsigned char c
;
4321 register unsigned char *this = XSTRING (elt
)->data
;
4323 while (hpos
< maxendcol
&& *this)
4325 unsigned char *last
= this;
4326 while ((c
= *this++) != '\0' && c
!= '%')
4328 if (this - 1 != last
)
4330 register int lim
= --this - last
+ hpos
;
4331 if (frame_title_ptr
)
4332 hpos
= store_frame_title (last
, hpos
, min (lim
, maxendcol
));
4334 hpos
= display_string (w
, vpos
, last
, -1, hpos
, 0, 1,
4335 hpos
, min (lim
, maxendcol
),
4336 STRING_MULTIBYTE (elt
));
4340 register int minendcol
;
4341 register int spec_width
= 0;
4343 /* We can't allow -ve args due to the "%-" construct */
4344 /* Argument specifies minwidth but not maxwidth
4345 (maxwidth can be specified by
4346 (<negative-number> . <stuff>) mode-line elements) */
4348 while ((c
= *this++) >= '0' && c
<= '9')
4350 spec_width
= spec_width
* 10 + (c
- '0');
4353 minendcol
= hpos
+ spec_width
;
4354 if (minendcol
> maxendcol
)
4356 spec_width
= maxendcol
- hpos
;
4357 minendcol
= maxendcol
;
4361 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4362 spec_width
, maxendcol
,
4363 Vglobal_mode_string
);
4366 char *spec
= decode_mode_spec (w
, c
, spec_width
,
4368 if (frame_title_ptr
)
4369 hpos
= store_frame_title (spec
, minendcol
, maxendcol
);
4371 hpos
= display_string (w
, vpos
, spec
, -1,
4373 minendcol
, maxendcol
, -1);
4381 /* A symbol: process the value of the symbol recursively
4382 as if it appeared here directly. Avoid error if symbol void.
4383 Special case: if value of symbol is a string, output the string
4386 register Lisp_Object tem
;
4387 tem
= Fboundp (elt
);
4390 tem
= Fsymbol_value (elt
);
4391 /* If value is a string, output that string literally:
4392 don't check for % within it. */
4395 if (frame_title_ptr
)
4396 hpos
= store_frame_title (XSTRING (tem
)->data
,
4397 minendcol
, maxendcol
);
4399 hpos
= display_string (w
, vpos
, XSTRING (tem
)->data
,
4400 STRING_BYTES (XSTRING (tem
)),
4401 hpos
, 0, 1, minendcol
, maxendcol
,
4402 STRING_MULTIBYTE (tem
));
4404 /* Give up right away for nil or t. */
4405 else if (!EQ (tem
, elt
))
4406 { elt
= tem
; goto tail_recurse
; }
4413 register Lisp_Object car
, tem
;
4415 /* A cons cell: three distinct cases.
4416 If first element is a string or a cons, process all the elements
4417 and effectively concatenate them.
4418 If first element is a negative number, truncate displaying cdr to
4419 at most that many characters. If positive, pad (with spaces)
4420 to at least that many characters.
4421 If first element is a symbol, process the cadr or caddr recursively
4422 according to whether the symbol's value is non-nil or nil. */
4423 car
= XCONS (elt
)->car
;
4426 tem
= Fboundp (car
);
4427 elt
= XCONS (elt
)->cdr
;
4430 /* elt is now the cdr, and we know it is a cons cell.
4431 Use its car if CAR has a non-nil value. */
4434 tem
= Fsymbol_value (car
);
4436 { elt
= XCONS (elt
)->car
; goto tail_recurse
; }
4438 /* Symbol's value is nil (or symbol is unbound)
4439 Get the cddr of the original list
4440 and if possible find the caddr and use that. */
4441 elt
= XCONS (elt
)->cdr
;
4444 else if (!CONSP (elt
))
4446 elt
= XCONS (elt
)->car
;
4449 else if (INTEGERP (car
))
4451 register int lim
= XINT (car
);
4452 elt
= XCONS (elt
)->cdr
;
4454 /* Negative int means reduce maximum width.
4455 DO NOT change MINENDCOL here!
4456 (20 -10 . foo) should truncate foo to 10 col
4457 and then pad to 20. */
4458 maxendcol
= min (maxendcol
, hpos
- lim
);
4461 /* Padding specified. Don't let it be more than
4464 if (lim
> maxendcol
)
4466 /* If that's more padding than already wanted, queue it.
4467 But don't reduce padding already specified even if
4468 that is beyond the current truncation point. */
4469 if (lim
> minendcol
)
4474 else if (STRINGP (car
) || CONSP (car
))
4476 register int limit
= 50;
4477 /* LIMIT is to protect against circular lists. */
4478 while (CONSP (elt
) && --limit
> 0
4479 && hpos
< maxendcol
)
4481 hpos
= display_mode_element (w
, vpos
, hpos
, depth
,
4484 elt
= XCONS (elt
)->cdr
;
4492 if (frame_title_ptr
)
4493 hpos
= store_frame_title ("*invalid*", minendcol
, maxendcol
);
4495 hpos
= display_string (w
, vpos
, "*invalid*", -1, hpos
, 0, 1,
4496 minendcol
, maxendcol
, 0);
4500 if (minendcol
> hpos
)
4501 if (frame_title_ptr
)
4502 hpos
= store_frame_title ("", minendcol
, maxendcol
);
4504 hpos
= display_string (w
, vpos
, "", 0, hpos
,
4505 0, 1, minendcol
, maxendcol
, 0);
4509 /* Write a null-terminated, right justified decimal representation of
4510 the positive integer D to BUF using a minimal field width WIDTH. */
4513 pint2str (buf
, width
, d
)
4518 register char *p
= buf
;
4525 *p
++ = d
% 10 + '0';
4528 for (width
-= (int) (p
- buf
); width
> 0; --width
) *p
++ = ' ';
4538 /* Set a mnemonic character for CODING_SYSTEM (Lisp symbol) in BUF.
4539 If EOL_FLAG is 1, set also a mnemonic character for end-of-line
4540 type of CODING_SYSTEM. Return updated pointer into BUF. */
4543 decode_mode_spec_coding (coding_system
, buf
, eol_flag
)
4544 Lisp_Object coding_system
;
4549 int multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
4551 val
= coding_system
;
4553 if (NILP (val
)) /* Not yet decided. */
4558 *buf
++ = eol_mnemonic_undecided
;
4559 /* Don't mention EOL conversion if it isn't decided. */
4563 Lisp_Object eolvalue
;
4565 eolvalue
= Fget (coding_system
, Qeol_type
);
4567 while (!NILP (val
) && SYMBOLP (val
))
4569 val
= Fget (val
, Qcoding_system
);
4570 if (NILP (eolvalue
))
4571 eolvalue
= Fget (val
, Qeol_type
);
4575 *buf
++ = XFASTINT (XVECTOR (val
)->contents
[1]);
4579 /* The EOL conversion we are using. */
4581 /* The EOL conversion that is normal on this system. */
4583 if (NILP (eolvalue
)) /* Not yet decided. */
4584 eoltype
= eol_mnemonic_undecided
;
4585 else if (VECTORP (eolvalue
)) /* Not yet decided. */
4586 eoltype
= eol_mnemonic_undecided
;
4587 else /* INTEGERP (eolvalue) -- 0:LF, 1:CRLF, 2:CR */
4588 eoltype
= (XFASTINT (eolvalue
) == 0
4590 : (XFASTINT (eolvalue
) == 1
4591 ? eol_mnemonic_dos
: eol_mnemonic_mac
));
4593 /* Mention the EOL conversion if it is not the usual one. */
4600 /* Return a string for the output of a mode line %-spec for window W,
4601 generated by character C. SPEC_WIDTH is the field width when
4602 padding to the left (%c, %l). The value returned from this
4603 function will later be truncated to width MAXWIDTH. */
4605 static char lots_of_dashes
[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
4608 decode_mode_spec (w
, c
, spec_width
, maxwidth
)
4611 register int spec_width
;
4612 register int maxwidth
;
4615 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
4616 char *decode_mode_spec_buf
= (char *) FRAME_TEMP_GLYPHS (f
)->total_contents
;
4617 struct buffer
*b
= XBUFFER (w
->buffer
);
4620 if (maxwidth
> FRAME_WIDTH (f
))
4621 maxwidth
= FRAME_WIDTH (f
);
4626 if (!NILP (b
->read_only
))
4628 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4633 /* This differs from %* only for a modified read-only buffer. */
4634 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4636 if (!NILP (b
->read_only
))
4641 /* This differs from %* in ignoring read-only-ness. */
4642 if (BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
4654 if (command_loop_level
> 5)
4656 p
= decode_mode_spec_buf
;
4657 for (i
= 0; i
< command_loop_level
; i
++)
4660 return decode_mode_spec_buf
;
4668 if (command_loop_level
> 5)
4670 p
= decode_mode_spec_buf
;
4671 for (i
= 0; i
< command_loop_level
; i
++)
4674 return decode_mode_spec_buf
;
4682 if (maxwidth
< sizeof (lots_of_dashes
))
4683 return lots_of_dashes
;
4686 for (p
= decode_mode_spec_buf
, i
= maxwidth
; i
> 0; i
--)
4690 return decode_mode_spec_buf
;
4696 if (maxwidth
>= 3 && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4698 bcopy (XSTRING (obj
)->data
, decode_mode_spec_buf
, maxwidth
- 1);
4699 decode_mode_spec_buf
[maxwidth
- 1] = '\\';
4700 decode_mode_spec_buf
[maxwidth
] = '\0';
4701 return decode_mode_spec_buf
;
4708 int col
= current_column ();
4709 XSETFASTINT (w
->column_number_displayed
, col
);
4710 pint2str (decode_mode_spec_buf
, spec_width
, col
);
4711 return decode_mode_spec_buf
;
4715 /* %F displays the frame name. */
4716 /* Systems that can only display a single frame at a time should
4717 NOT replace the frame name with the (constant) frame title,
4718 since then they won't be able to tell which frame is that. */
4719 if (FRAME_WINDOW_P (f
) && !NILP (f
->title
))
4720 return (char *) XSTRING (f
->title
)->data
;
4721 if (f
->explicit_name
|| ! FRAME_WINDOW_P (f
))
4722 return (char *) XSTRING (f
->name
)->data
;
4730 else if (STRINGP (obj
) && STRING_BYTES (XSTRING (obj
)) > maxwidth
)
4732 bcopy ("...", decode_mode_spec_buf
, 3);
4733 bcopy (XSTRING (obj
)->data
+ STRING_BYTES (XSTRING (obj
)) - maxwidth
+ 3,
4734 decode_mode_spec_buf
+ 3, maxwidth
- 3);
4735 return decode_mode_spec_buf
;
4742 int startpos
= XMARKER (w
->start
)->charpos
;
4743 int startpos_byte
= marker_byte_position (w
->start
);
4744 int line
, linepos
, linepos_byte
, topline
;
4747 int height
= XFASTINT (w
->height
);
4749 /* If we decided that this buffer isn't suitable for line numbers,
4750 don't forget that too fast. */
4751 if (EQ (w
->base_line_pos
, w
->buffer
))
4753 /* But do forget it, if the window shows a different buffer now. */
4754 else if (BUFFERP (w
->base_line_pos
))
4755 w
->base_line_pos
= Qnil
;
4757 /* If the buffer is very big, don't waste time. */
4758 if (BUF_ZV (b
) - BUF_BEGV (b
) > line_number_display_limit
)
4760 w
->base_line_pos
= Qnil
;
4761 w
->base_line_number
= Qnil
;
4765 if (!NILP (w
->base_line_number
)
4766 && !NILP (w
->base_line_pos
)
4767 && XFASTINT (w
->base_line_pos
) <= startpos
)
4769 line
= XFASTINT (w
->base_line_number
);
4770 linepos
= XFASTINT (w
->base_line_pos
);
4771 linepos_byte
= buf_charpos_to_bytepos (b
, linepos
);
4776 linepos
= BUF_BEGV (b
);
4777 linepos_byte
= BUF_BEGV_BYTE (b
);
4780 /* Count lines from base line to window start position. */
4781 nlines
= display_count_lines (linepos
, linepos_byte
,
4785 topline
= nlines
+ line
;
4787 /* Determine a new base line, if the old one is too close
4788 or too far away, or if we did not have one.
4789 "Too close" means it's plausible a scroll-down would
4791 if (startpos
== BUF_BEGV (b
))
4793 XSETFASTINT (w
->base_line_number
, topline
);
4794 XSETFASTINT (w
->base_line_pos
, BUF_BEGV (b
));
4796 else if (nlines
< height
+ 25 || nlines
> height
* 3 + 50
4797 || linepos
== BUF_BEGV (b
))
4799 int limit
= BUF_BEGV (b
);
4800 int limit_byte
= BUF_BEGV_BYTE (b
);
4802 int distance
= (height
* 2 + 30) * 200;
4804 if (startpos
- distance
> limit
)
4806 limit
= startpos
- distance
;
4807 limit_byte
= CHAR_TO_BYTE (limit
);
4810 nlines
= display_count_lines (startpos
, startpos_byte
,
4812 - (height
* 2 + 30),
4814 /* If we couldn't find the lines we wanted within
4816 give up on line numbers for this window. */
4817 if (position
== limit_byte
&& limit
== startpos
- distance
)
4819 w
->base_line_pos
= w
->buffer
;
4820 w
->base_line_number
= Qnil
;
4824 XSETFASTINT (w
->base_line_number
, topline
- nlines
);
4825 XSETFASTINT (w
->base_line_pos
, BYTE_TO_CHAR (position
));
4828 /* Now count lines from the start pos to point. */
4829 nlines
= display_count_lines (startpos
, startpos_byte
,
4830 PT_BYTE
, PT
, &junk
);
4832 /* Record that we did display the line number. */
4833 line_number_displayed
= 1;
4835 /* Make the string to show. */
4836 pint2str (decode_mode_spec_buf
, spec_width
, topline
+ nlines
);
4837 return decode_mode_spec_buf
;
4840 char* p
= decode_mode_spec_buf
;
4841 for (spec_width
-= 2; spec_width
> 0; --spec_width
) *p
++ = ' ';
4843 return decode_mode_spec_buf
;
4853 if (BUF_BEGV (b
) > BUF_BEG (b
) || BUF_ZV (b
) < BUF_Z (b
))
4859 int pos
= marker_position (w
->start
);
4860 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4862 if (XFASTINT (w
->window_end_pos
) <= BUF_Z (b
) - BUF_ZV (b
))
4864 if (pos
<= BUF_BEGV (b
))
4869 else if (pos
<= BUF_BEGV (b
))
4873 if (total
> 1000000)
4874 /* Do it differently for a large value, to avoid overflow. */
4875 total
= ((pos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4877 total
= ((pos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4878 /* We can't normally display a 3-digit number,
4879 so get us a 2-digit number that is close. */
4882 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4883 return decode_mode_spec_buf
;
4887 /* Display percentage of size above the bottom of the screen. */
4890 int toppos
= marker_position (w
->start
);
4891 int botpos
= BUF_Z (b
) - XFASTINT (w
->window_end_pos
);
4892 int total
= BUF_ZV (b
) - BUF_BEGV (b
);
4894 if (botpos
>= BUF_ZV (b
))
4896 if (toppos
<= BUF_BEGV (b
))
4903 if (total
> 1000000)
4904 /* Do it differently for a large value, to avoid overflow. */
4905 total
= ((botpos
- BUF_BEGV (b
)) + (total
/ 100) - 1) / (total
/ 100);
4907 total
= ((botpos
- BUF_BEGV (b
)) * 100 + total
- 1) / total
;
4908 /* We can't normally display a 3-digit number,
4909 so get us a 2-digit number that is close. */
4912 if (toppos
<= BUF_BEGV (b
))
4913 sprintf (decode_mode_spec_buf
, "Top%2d%%", total
);
4915 sprintf (decode_mode_spec_buf
, "%2d%%", total
);
4916 return decode_mode_spec_buf
;
4921 /* status of process */
4922 obj
= Fget_buffer_process (w
->buffer
);
4924 return "no process";
4926 obj
= Fsymbol_name (Fprocess_status (obj
));
4930 case 't': /* indicate TEXT or BINARY */
4931 #ifdef MODE_LINE_BINARY_TEXT
4932 return MODE_LINE_BINARY_TEXT (b
);
4938 /* coding-system (not including end-of-line format) */
4940 /* coding-system (including end-of-line type) */
4942 int eol_flag
= (c
== 'Z');
4943 char *p
= decode_mode_spec_buf
;
4945 if (! FRAME_WINDOW_P (f
))
4947 /* No need to mention EOL here--the terminal never needs
4948 to do EOL conversion. */
4949 p
= decode_mode_spec_coding (keyboard_coding
.symbol
, p
, 0);
4950 p
= decode_mode_spec_coding (terminal_coding
.symbol
, p
, 0);
4952 p
= decode_mode_spec_coding (b
->buffer_file_coding_system
,
4955 #if 0 /* This proves to be annoying; I think we can do without. -- rms. */
4957 obj
= Fget_buffer_process (Fcurrent_buffer ());
4960 p
= decode_mode_spec_coding (XPROCESS (obj
)->decode_coding_system
,
4962 p
= decode_mode_spec_coding (XPROCESS (obj
)->encode_coding_system
,
4965 #endif /* subprocesses */
4968 return decode_mode_spec_buf
;
4973 return (char *) XSTRING (obj
)->data
;
4978 /* Count up to COUNT lines starting from START / START_BYTE.
4979 But don't go beyond LIMIT_BYTE.
4980 Return the number of lines thus found (always nonnegative).
4982 Set *BYTE_POS_PTR to 1 if we found COUNT lines, 0 if we hit LIMIT. */
4985 display_count_lines (start
, start_byte
, limit_byte
, count
, byte_pos_ptr
)
4986 int start
, start_byte
, limit_byte
, count
;
4989 register unsigned char *cursor
;
4990 unsigned char *base
;
4992 register int ceiling
;
4993 register unsigned char *ceiling_addr
;
4994 int orig_count
= count
;
4996 /* If we are not in selective display mode,
4997 check only for newlines. */
4998 int selective_display
= (!NILP (current_buffer
->selective_display
)
4999 && !INTEGERP (current_buffer
->selective_display
));
5003 while (start_byte
< limit_byte
)
5005 ceiling
= BUFFER_CEILING_OF (start_byte
);
5006 ceiling
= min (limit_byte
- 1, ceiling
);
5007 ceiling_addr
= BYTE_POS_ADDR (ceiling
) + 1;
5008 base
= (cursor
= BYTE_POS_ADDR (start_byte
));
5011 if (selective_display
)
5012 while (*cursor
!= '\n' && *cursor
!= 015 && ++cursor
!= ceiling_addr
)
5015 while (*cursor
!= '\n' && ++cursor
!= ceiling_addr
)
5018 if (cursor
!= ceiling_addr
)
5022 start_byte
+= cursor
- base
+ 1;
5023 *byte_pos_ptr
= start_byte
;
5027 if (++cursor
== ceiling_addr
)
5033 start_byte
+= cursor
- base
;
5038 while (start_byte
> limit_byte
)
5040 ceiling
= BUFFER_FLOOR_OF (start_byte
- 1);
5041 ceiling
= max (limit_byte
, ceiling
);
5042 ceiling_addr
= BYTE_POS_ADDR (ceiling
) - 1;
5043 base
= (cursor
= BYTE_POS_ADDR (start_byte
- 1) + 1);
5046 if (selective_display
)
5047 while (--cursor
!= ceiling_addr
5048 && *cursor
!= '\n' && *cursor
!= 015)
5051 while (--cursor
!= ceiling_addr
&& *cursor
!= '\n')
5054 if (cursor
!= ceiling_addr
)
5058 start_byte
+= cursor
- base
+ 1;
5059 *byte_pos_ptr
= start_byte
;
5060 /* When scanning backwards, we should
5061 not count the newline posterior to which we stop. */
5062 return - orig_count
- 1;
5068 /* Here we add 1 to compensate for the last decrement
5069 of CURSOR, which took it past the valid range. */
5070 start_byte
+= cursor
- base
+ 1;
5074 *byte_pos_ptr
= limit_byte
;
5077 return - orig_count
+ count
;
5078 return orig_count
- count
;
5082 /* Display STRING on one line of window W, starting at HPOS.
5083 Display at position VPOS. Caller should have done get_display_line.
5084 If VPOS == -1, display it as the current frame's title.
5085 LENGTH is the length of STRING, or -1 meaning STRING is null-terminated.
5087 TRUNCATE is GLYPH to display at end if truncated. Zero for none.
5089 MINCOL is the first column ok to end at. (Pad with spaces to this col.)
5090 MAXCOL is the last column ok to end at. Truncate here.
5091 -1 for MINCOL or MAXCOL means no explicit minimum or maximum.
5092 Both count from the left edge of the frame, as does HPOS.
5093 The right edge of W is an implicit maximum.
5094 If TRUNCATE is nonzero, the implicit maximum is one column before the edge.
5096 OBEY_WINDOW_WIDTH says to put spaces or vertical bars
5097 at the place where the current window ends in this line
5098 and not display anything beyond there. Otherwise, only MAXCOL
5099 controls where to stop output.
5101 MULTIBYTE can be 0 meaning do not display multibyte chars,
5102 1 meaning do display them, or -1 meaning obey the current buffer's
5103 value of enable_multibyte_characters.
5105 Returns ending hpos. */
5108 display_string (w
, vpos
, string
, length
, hpos
, truncate
,
5109 obey_window_width
, mincol
, maxcol
, multibyte
)
5111 unsigned char *string
;
5115 int obey_window_width
;
5122 int hscroll
= XINT (w
->hscroll
);
5123 int tab_width
= XINT (XBUFFER (w
->buffer
)->tab_width
);
5124 register GLYPH
*start
;
5125 register GLYPH
*end
;
5126 FRAME_PTR f
= XFRAME (WINDOW_FRAME (w
));
5127 struct frame_glyphs
*desired_glyphs
= FRAME_DESIRED_GLYPHS (f
);
5128 GLYPH
*p1start
= desired_glyphs
->glyphs
[vpos
] + hpos
;
5129 int window_width
= XFASTINT (w
->width
);
5131 /* Use the standard display table, not the window's display table.
5132 We don't want the mode line in rot13. */
5133 register struct Lisp_Char_Table
*dp
= 0;
5136 if (multibyte
== -1)
5137 multibyte
= !NILP (current_buffer
->enable_multibyte_characters
);
5138 /* Now multibyte is 1 if we should display multibyte characters. */
5140 if (DISP_TABLE_P (Vstandard_display_table
))
5141 dp
= XCHAR_TABLE (Vstandard_display_table
);
5143 if (tab_width
<= 0 || tab_width
> 1000) tab_width
= 8;
5146 start
= desired_glyphs
->glyphs
[vpos
];
5148 if (obey_window_width
)
5150 start
+= XFASTINT (w
->left
);
5151 end
= start
+ window_width
- (truncate
!= 0);
5153 if (!WINDOW_RIGHTMOST_P (w
))
5155 if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_RIGHT (f
))
5159 for (i
= 0; i
< FRAME_SCROLL_BAR_COLS (f
); i
++)
5162 else if (!FRAME_HAS_VERTICAL_SCROLL_BARS (f
))
5167 if (! obey_window_width
5168 || (maxcol
>= 0 && end
- desired_glyphs
->glyphs
[vpos
] > maxcol
))
5169 end
= desired_glyphs
->glyphs
[vpos
] + maxcol
;
5171 /* Store 0 in charstart for these columns. */
5172 for (i
= (hpos
>= 0 ? hpos
: 0); i
< end
- p1start
+ hpos
; i
++)
5173 desired_glyphs
->charstarts
[vpos
][i
] = 0;
5175 if (maxcol
>= 0 && mincol
> maxcol
)
5179 /* We need this value for multibyte characters. */
5180 length
= strlen (string
);
5182 /* We set truncated to 1 if we get stopped by trying to pass END
5183 (that is, trying to pass MAXCOL.) */
5192 c
= STRING_CHAR_AND_LENGTH (string
, length
, len
);
5194 c
= *string
, len
= 1;
5196 string
+= len
, length
-= len
;
5204 if (dp
!= 0 && VECTORP (DISP_CHAR_VECTOR (dp
, c
)))
5206 p1
= copy_part_of_rope (f
, p1
, start
,
5207 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->contents
,
5208 XVECTOR (DISP_CHAR_VECTOR (dp
, c
))->size
,
5211 else if (c
>= 040 && c
< 0177)
5221 if (p1
>= start
&& p1
< end
)
5225 while ((p1
- start
+ hscroll
- (hscroll
> 0)) % tab_width
);
5227 else if (c
< 0200 && ! NILP (buffer_defaults
.ctl_arrow
))
5231 (f
, (dp
&& INTEGERP (DISP_CTRL_GLYPH (dp
))
5232 && GLYPH_CHAR_VALID_P (XINT (DISP_CTRL_GLYPH (dp
)))
5233 ? XINT (DISP_CTRL_GLYPH (dp
)) : '^'),
5236 if (p1
>= start
&& p1
< end
)
5242 /* C is a control character or a binary byte data. */
5245 (f
, (dp
&& INTEGERP (DISP_ESCAPE_GLYPH (dp
))
5246 && GLYPH_CHAR_VALID_P (XINT (DISP_ESCAPE_GLYPH (dp
)))
5247 ? XINT (DISP_ESCAPE_GLYPH (dp
)) : '\\'),
5250 if (p1
>= start
&& p1
< end
)
5251 *p1
= (c
>> 6) + '0';
5253 if (p1
>= start
&& p1
< end
)
5254 *p1
= (7 & (c
>> 3)) + '0';
5256 if (p1
>= start
&& p1
< end
)
5257 *p1
= (7 & c
) + '0';
5262 /* C is a multibyte character. */
5263 int charset
= CHAR_CHARSET (c
);
5264 int columns
= (charset
== CHARSET_COMPOSITION
5265 ? cmpchar_table
[COMPOSITE_CHAR_ID (c
)]->width
5266 : CHARSET_WIDTH (charset
));
5270 /* Since we can't show the left part of C, fill all
5271 columns with spaces. */
5272 columns
-= start
- p1
;
5281 else if (p1
+ columns
> end
)
5283 /* Since we can't show the right part of C, fill all
5284 columns with TRUNCATE if TRUNCATE is specified. */
5288 *p1
++ = fix_glyph (f
, truncate
, 0);
5289 /* And tell the line is truncated. */
5296 /* We can show the whole glyph of C. */
5299 *p1
++ = c
| GLYPH_MASK_PADDING
;
5307 if (truncate
) *p1
++ = fix_glyph (f
, truncate
, 0);
5309 else if (mincol
>= 0)
5311 end
= desired_glyphs
->glyphs
[vpos
] + mincol
;
5317 register int len
= p1
- desired_glyphs
->glyphs
[vpos
];
5319 if (len
> desired_glyphs
->used
[vpos
])
5320 desired_glyphs
->used
[vpos
] = len
;
5321 desired_glyphs
->glyphs
[vpos
][desired_glyphs
->used
[vpos
]] = 0;
5327 /* This is like a combination of memq and assq.
5328 Return 1 if PROPVAL appears as an element of LIST
5329 or as the car of an element of LIST.
5330 If PROPVAL is a list, compare each element against LIST
5331 in that way, and return 1 if any element of PROPVAL is found in LIST.
5333 This function cannot quit. */
5336 invisible_p (propval
, list
)
5337 register Lisp_Object propval
;
5340 register Lisp_Object tail
, proptail
;
5341 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5343 register Lisp_Object tem
;
5344 tem
= XCONS (tail
)->car
;
5345 if (EQ (propval
, tem
))
5347 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5350 if (CONSP (propval
))
5351 for (proptail
= propval
; CONSP (proptail
);
5352 proptail
= XCONS (proptail
)->cdr
)
5354 Lisp_Object propelt
;
5355 propelt
= XCONS (proptail
)->car
;
5356 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5358 register Lisp_Object tem
;
5359 tem
= XCONS (tail
)->car
;
5360 if (EQ (propelt
, tem
))
5362 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5369 /* Return 1 if PROPVAL appears as the car of an element of LIST
5370 and the cdr of that element is non-nil.
5371 If PROPVAL is a list, check each element of PROPVAL in that way,
5372 and the first time some element is found,
5373 return 1 if the cdr of that element is non-nil.
5375 This function cannot quit. */
5378 invisible_ellipsis_p (propval
, list
)
5379 register Lisp_Object propval
;
5382 register Lisp_Object tail
, proptail
;
5383 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5385 register Lisp_Object tem
;
5386 tem
= XCONS (tail
)->car
;
5387 if (CONSP (tem
) && EQ (propval
, XCONS (tem
)->car
))
5388 return ! NILP (XCONS (tem
)->cdr
);
5390 if (CONSP (propval
))
5391 for (proptail
= propval
; CONSP (proptail
);
5392 proptail
= XCONS (proptail
)->cdr
)
5394 Lisp_Object propelt
;
5395 propelt
= XCONS (proptail
)->car
;
5396 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
5398 register Lisp_Object tem
;
5399 tem
= XCONS (tail
)->car
;
5400 if (CONSP (tem
) && EQ (propelt
, XCONS (tem
)->car
))
5401 return ! NILP (XCONS (tem
)->cdr
);
5410 staticpro (&Qinhibit_redisplay
);
5411 Qinhibit_redisplay
= intern ("inhibit-redisplay");
5413 staticpro (&Qmenu_bar_update_hook
);
5414 Qmenu_bar_update_hook
= intern ("menu-bar-update-hook");
5416 staticpro (&Qoverriding_terminal_local_map
);
5417 Qoverriding_terminal_local_map
= intern ("overriding-terminal-local-map");
5419 staticpro (&Qoverriding_local_map
);
5420 Qoverriding_local_map
= intern ("overriding-local-map");
5422 staticpro (&Qwindow_scroll_functions
);
5423 Qwindow_scroll_functions
= intern ("window-scroll-functions");
5425 staticpro (&Qredisplay_end_trigger_functions
);
5426 Qredisplay_end_trigger_functions
= intern ("redisplay-end-trigger-functions");
5428 staticpro (&Qinhibit_point_motion_hooks
);
5429 Qinhibit_point_motion_hooks
= intern ("inhibit-point-motion-hooks");
5431 staticpro (&last_arrow_position
);
5432 staticpro (&last_arrow_string
);
5433 last_arrow_position
= Qnil
;
5434 last_arrow_string
= Qnil
;
5436 DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay
,
5437 "Non-nil means don't actually do any redisplay.\n\
5438 This is used for internal purposes.");
5439 Vinhibit_redisplay
= Qnil
;
5441 DEFVAR_LISP ("global-mode-string", &Vglobal_mode_string
,
5442 "String (or mode line construct) included (normally) in `mode-line-format'.");
5443 Vglobal_mode_string
= Qnil
;
5445 DEFVAR_LISP ("overlay-arrow-position", &Voverlay_arrow_position
,
5446 "Marker for where to display an arrow on top of the buffer text.\n\
5447 This must be the beginning of a line in order to work.\n\
5448 See also `overlay-arrow-string'.");
5449 Voverlay_arrow_position
= Qnil
;
5451 DEFVAR_LISP ("overlay-arrow-string", &Voverlay_arrow_string
,
5452 "String to display as an arrow. See also `overlay-arrow-position'.");
5453 Voverlay_arrow_string
= Qnil
;
5455 DEFVAR_INT ("scroll-step", &scroll_step
,
5456 "*The number of lines to try scrolling a window by when point moves out.\n\
5457 If that fails to bring point back on frame, point is centered instead.\n\
5458 If this is zero, point is always centered after it moves off frame.");
5460 DEFVAR_INT ("scroll-conservatively", &scroll_conservatively
,
5461 "*Scroll up to this many lines, to bring point back on screen.");
5462 scroll_conservatively
= 0;
5464 DEFVAR_INT ("scroll-margin", &scroll_margin
,
5465 "*Number of lines of margin at the top and bottom of a window.\n\
5466 Recenter the window whenever point gets within this many lines\n\
5467 of the top or bottom of the window.");
5470 DEFVAR_INT ("debug-end-pos", &debug_end_pos
, "Don't ask");
5472 DEFVAR_BOOL ("truncate-partial-width-windows",
5473 &truncate_partial_width_windows
,
5474 "*Non-nil means truncate lines in all windows less than full frame wide.");
5475 truncate_partial_width_windows
= 1;
5477 DEFVAR_BOOL ("mode-line-inverse-video", &mode_line_inverse_video
,
5478 "*Non-nil means use inverse video for the mode line.");
5479 mode_line_inverse_video
= 1;
5481 DEFVAR_INT ("line-number-display-limit", &line_number_display_limit
,
5482 "*Maximum buffer size (in characters) for line number display\n\
5483 If the buffer is bigger than this, the line number does not appear\n\
5484 in the mode line..");
5485 line_number_display_limit
= 1000000;
5487 DEFVAR_BOOL ("highlight-nonselected-windows", &highlight_nonselected_windows
,
5488 "*Non-nil means highlight region even in nonselected windows.");
5489 highlight_nonselected_windows
= 0;
5491 DEFVAR_BOOL ("multiple-frames", &multiple_frames
,
5492 "Non-nil if more than one frame is visible on this display.\n\
5493 Minibuffer-only frames don't count, but iconified frames do.\n\
5494 This variable is not guaranteed to be accurate except while processing\n\
5495 `frame-title-format' and `icon-title-format'.");
5497 DEFVAR_LISP ("frame-title-format", &Vframe_title_format
,
5498 "Template for displaying the titlebar of visible frames.\n\
5499 \(Assuming the window manager supports this feature.)\n\
5500 This variable has the same structure as `mode-line-format' (which see),\n\
5501 and is used only on frames for which no explicit name has been set\n\
5502 \(see `modify-frame-parameters').");
5503 DEFVAR_LISP ("icon-title-format", &Vicon_title_format
,
5504 "Template for displaying the titlebar of an iconified frame.\n\
5505 \(Assuming the window manager supports this feature.)\n\
5506 This variable has the same structure as `mode-line-format' (which see),\n\
5507 and is used only on frames for which no explicit name has been set\n\
5508 \(see `modify-frame-parameters').");
5510 = Vframe_title_format
5511 = Fcons (intern ("multiple-frames"),
5512 Fcons (build_string ("%b"),
5513 Fcons (Fcons (build_string (""),
5514 Fcons (intern ("invocation-name"),
5515 Fcons (build_string ("@"),
5516 Fcons (intern ("system-name"),
5520 DEFVAR_LISP ("message-log-max", &Vmessage_log_max
,
5521 "Maximum number of lines to keep in the message log buffer.\n\
5522 If nil, disable message logging. If t, log messages but don't truncate\n\
5523 the buffer when it becomes large.");
5524 XSETFASTINT (Vmessage_log_max
, 50);
5526 DEFVAR_LISP ("window-size-change-functions", &Vwindow_size_change_functions
,
5527 "Functions called before redisplay, if window sizes have changed.\n\
5528 The value should be a list of functions that take one argument.\n\
5529 Just before redisplay, for each frame, if any of its windows have changed\n\
5530 size since the last redisplay, or have been split or deleted,\n\
5531 all the functions in the list are called, with the frame as argument.");
5532 Vwindow_size_change_functions
= Qnil
;
5534 DEFVAR_LISP ("window-scroll-functions", &Vwindow_scroll_functions
,
5535 "List of functions to call before redisplaying a window with scrolling.\n\
5536 Each function is called with two arguments, the window\n\
5537 and its new display-start position. Note that the value of `window-end'\n\
5538 is not valid when these functions are called.");
5539 Vwindow_scroll_functions
= Qnil
;
5541 DEFVAR_INT ("minibuffer-scroll-overlap", &minibuffer_scroll_overlap
,
5542 "*Number of characters of overlap when scrolling a one-line window.\n\
5543 This commonly affects the minibuffer window, hence the name of the variable.");
5544 minibuffer_scroll_overlap
= 20;
5547 /* initialize the window system */
5551 Lisp_Object root_window
;
5552 #ifndef COMPILER_REGISTER_BUG
5554 #endif /* COMPILER_REGISTER_BUG */
5555 struct window
*mini_w
;
5557 this_line_bufpos
= 0;
5559 mini_w
= XWINDOW (minibuf_window
);
5560 root_window
= FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w
)));
5562 echo_area_glyphs
= 0;
5563 previous_echo_glyphs
= 0;
5565 if (!noninteractive
)
5567 FRAME_PTR f
= XFRAME (WINDOW_FRAME (XWINDOW (root_window
)));
5568 XSETFASTINT (XWINDOW (root_window
)->top
, FRAME_MENU_BAR_LINES (f
));
5569 set_window_height (root_window
,
5570 FRAME_HEIGHT (f
) - 1 - FRAME_MENU_BAR_LINES (f
),
5572 XSETFASTINT (mini_w
->top
, FRAME_HEIGHT (f
) - 1);
5573 set_window_height (minibuf_window
, 1, 0);
5575 XSETFASTINT (XWINDOW (root_window
)->width
, FRAME_WIDTH (f
));
5576 XSETFASTINT (mini_w
->width
, FRAME_WIDTH (f
));