forked from emacs-mirror/emacs
/
term.c
2628 lines (2218 loc) · 72.1 KB
/
term.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* Terminal control module for terminals described by TERMCAP
Copyright (C) 1985, 86, 87, 93, 94, 95, 98, 2000, 2001
Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* New redisplay, TTY faces by Gerd Moellmann <gerd@gnu.org>. */
#include <config.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "termchar.h"
#include "termopts.h"
#include "lisp.h"
#include "charset.h"
#include "coding.h"
#include "keyboard.h"
#include "frame.h"
#include "disptab.h"
#include "termhooks.h"
#include "dispextern.h"
#include "window.h"
/* For now, don't try to include termcap.h. On some systems,
configure finds a non-standard termcap.h that the main build
won't find. */
#if defined HAVE_TERMCAP_H && 0
#include <termcap.h>
#else
extern void tputs P_ ((const char *, int, int (*)(int)));
extern int tgetent P_ ((char *, const char *));
extern int tgetflag P_ ((char *id));
extern int tgetnum P_ ((char *id));
#endif
#include "cm.h"
#ifdef HAVE_X_WINDOWS
#include "xterm.h"
#endif
#ifdef macintosh
#include "macterm.h"
#endif
static void turn_on_face P_ ((struct frame *, int face_id));
static void turn_off_face P_ ((struct frame *, int face_id));
static void tty_show_cursor P_ ((void));
static void tty_hide_cursor P_ ((void));
#define max(a, b) ((a) > (b) ? (a) : (b))
#define min(a, b) ((a) < (b) ? (a) : (b))
#define OUTPUT(a) \
tputs (a, (int) (FRAME_HEIGHT (XFRAME (selected_frame)) - curY), cmputc)
#define OUTPUT1(a) tputs (a, 1, cmputc)
#define OUTPUTL(a, lines) tputs (a, lines, cmputc)
#define OUTPUT_IF(a) \
do { \
if (a) \
tputs (a, (int) (FRAME_HEIGHT (XFRAME (selected_frame)) \
- curY), cmputc); \
} while (0)
#define OUTPUT1_IF(a) do { if (a) tputs (a, 1, cmputc); } while (0)
/* Function to use to ring the bell. */
Lisp_Object Vring_bell_function;
/* Terminal characteristics that higher levels want to look at.
These are all extern'd in termchar.h */
int must_write_spaces; /* Nonzero means spaces in the text
must actually be output; can't just skip
over some columns to leave them blank. */
int min_padding_speed; /* Speed below which no padding necessary */
int line_ins_del_ok; /* Terminal can insert and delete lines */
int char_ins_del_ok; /* Terminal can insert and delete chars */
int scroll_region_ok; /* Terminal supports setting the
scroll window */
int scroll_region_cost; /* Cost of setting a scroll window,
measured in characters */
int memory_below_frame; /* Terminal remembers lines
scrolled off bottom */
int fast_clear_end_of_line; /* Terminal has a `ce' string */
/* Nonzero means no need to redraw the entire frame on resuming
a suspended Emacs. This is useful on terminals with multiple pages,
where one page is used for Emacs and another for all else. */
int no_redraw_on_reenter;
/* Hook functions that you can set to snap out the functions in this file.
These are all extern'd in termhooks.h */
void (*cursor_to_hook) P_ ((int, int));
void (*raw_cursor_to_hook) P_ ((int, int));
void (*clear_to_end_hook) P_ ((void));
void (*clear_frame_hook) P_ ((void));
void (*clear_end_of_line_hook) P_ ((int));
void (*ins_del_lines_hook) P_ ((int, int));
void (*change_line_highlight_hook) P_ ((int, int, int, int));
void (*reassert_line_highlight_hook) P_ ((int, int));
void (*delete_glyphs_hook) P_ ((int));
void (*ring_bell_hook) P_ ((void));
void (*reset_terminal_modes_hook) P_ ((void));
void (*set_terminal_modes_hook) P_ ((void));
void (*update_begin_hook) P_ ((struct frame *));
void (*update_end_hook) P_ ((struct frame *));
void (*set_terminal_window_hook) P_ ((int));
void (*insert_glyphs_hook) P_ ((struct glyph *, int));
void (*write_glyphs_hook) P_ ((struct glyph *, int));
void (*delete_glyphs_hook) P_ ((int));
int (*read_socket_hook) P_ ((int, struct input_event *, int, int));
void (*frame_up_to_date_hook) P_ ((struct frame *));
/* Return the current position of the mouse.
Set *f to the frame the mouse is in, or zero if the mouse is in no
Emacs frame. If it is set to zero, all the other arguments are
garbage.
If the motion started in a scroll bar, set *bar_window to the
scroll bar's window, *part to the part the mouse is currently over,
*x to the position of the mouse along the scroll bar, and *y to the
overall length of the scroll bar.
Otherwise, set *bar_window to Qnil, and *x and *y to the column and
row of the character cell the mouse is over.
Set *time to the time the mouse was at the returned position.
This should clear mouse_moved until the next motion
event arrives. */
void (*mouse_position_hook) P_ ((FRAME_PTR *f, int insist,
Lisp_Object *bar_window,
enum scroll_bar_part *part,
Lisp_Object *x,
Lisp_Object *y,
unsigned long *time));
/* When reading from a minibuffer in a different frame, Emacs wants
to shift the highlight from the selected frame to the mini-buffer's
frame; under X, this means it lies about where the focus is.
This hook tells the window system code to re-decide where to put
the highlight. */
void (*frame_rehighlight_hook) P_ ((FRAME_PTR f));
/* If we're displaying frames using a window system that can stack
frames on top of each other, this hook allows you to bring a frame
to the front, or bury it behind all the other windows. If this
hook is zero, that means the device we're displaying on doesn't
support overlapping frames, so there's no need to raise or lower
anything.
If RAISE is non-zero, F is brought to the front, before all other
windows. If RAISE is zero, F is sent to the back, behind all other
windows. */
void (*frame_raise_lower_hook) P_ ((FRAME_PTR f, int raise));
/* Set the vertical scroll bar for WINDOW to have its upper left corner
at (TOP, LEFT), and be LENGTH rows high. Set its handle to
indicate that we are displaying PORTION characters out of a total
of WHOLE characters, starting at POSITION. If WINDOW doesn't yet
have a scroll bar, create one for it. */
void (*set_vertical_scroll_bar_hook)
P_ ((struct window *window,
int portion, int whole, int position));
/* The following three hooks are used when we're doing a thorough
redisplay of the frame. We don't explicitly know which scroll bars
are going to be deleted, because keeping track of when windows go
away is a real pain - can you say set-window-configuration?
Instead, we just assert at the beginning of redisplay that *all*
scroll bars are to be removed, and then save scroll bars from the
fiery pit when we actually redisplay their window. */
/* Arrange for all scroll bars on FRAME to be removed at the next call
to `*judge_scroll_bars_hook'. A scroll bar may be spared if
`*redeem_scroll_bar_hook' is applied to its window before the judgment.
This should be applied to each frame each time its window tree is
redisplayed, even if it is not displaying scroll bars at the moment;
if the HAS_SCROLL_BARS flag has just been turned off, only calling
this and the judge_scroll_bars_hook will get rid of them.
If non-zero, this hook should be safe to apply to any frame,
whether or not it can support scroll bars, and whether or not it is
currently displaying them. */
void (*condemn_scroll_bars_hook) P_ ((FRAME_PTR frame));
/* Unmark WINDOW's scroll bar for deletion in this judgement cycle.
Note that it's okay to redeem a scroll bar that is not condemned. */
void (*redeem_scroll_bar_hook) P_ ((struct window *window));
/* Remove all scroll bars on FRAME that haven't been saved since the
last call to `*condemn_scroll_bars_hook'.
This should be applied to each frame after each time its window
tree is redisplayed, even if it is not displaying scroll bars at the
moment; if the HAS_SCROLL_BARS flag has just been turned off, only
calling this and condemn_scroll_bars_hook will get rid of them.
If non-zero, this hook should be safe to apply to any frame,
whether or not it can support scroll bars, and whether or not it is
currently displaying them. */
void (*judge_scroll_bars_hook) P_ ((FRAME_PTR FRAME));
/* Hook to call in estimate_mode_line_height, if any. */
int (* estimate_mode_line_height_hook) P_ ((struct frame *f, enum face_id));
/* Strings, numbers and flags taken from the termcap entry. */
char *TS_ins_line; /* "al" */
char *TS_ins_multi_lines; /* "AL" (one parameter, # lines to insert) */
char *TS_bell; /* "bl" */
char *TS_clr_to_bottom; /* "cd" */
char *TS_clr_line; /* "ce", clear to end of line */
char *TS_clr_frame; /* "cl" */
char *TS_set_scroll_region; /* "cs" (2 params, first line and last line) */
char *TS_set_scroll_region_1; /* "cS" (4 params: total lines,
lines above scroll region, lines below it,
total lines again) */
char *TS_del_char; /* "dc" */
char *TS_del_multi_chars; /* "DC" (one parameter, # chars to delete) */
char *TS_del_line; /* "dl" */
char *TS_del_multi_lines; /* "DL" (one parameter, # lines to delete) */
char *TS_delete_mode; /* "dm", enter character-delete mode */
char *TS_end_delete_mode; /* "ed", leave character-delete mode */
char *TS_end_insert_mode; /* "ei", leave character-insert mode */
char *TS_ins_char; /* "ic" */
char *TS_ins_multi_chars; /* "IC" (one parameter, # chars to insert) */
char *TS_insert_mode; /* "im", enter character-insert mode */
char *TS_pad_inserted_char; /* "ip". Just padding, no commands. */
char *TS_end_keypad_mode; /* "ke" */
char *TS_keypad_mode; /* "ks" */
char *TS_pad_char; /* "pc", char to use as padding */
char *TS_repeat; /* "rp" (2 params, # times to repeat
and character to be repeated) */
char *TS_end_standout_mode; /* "se" */
char *TS_fwd_scroll; /* "sf" */
char *TS_standout_mode; /* "so" */
char *TS_rev_scroll; /* "sr" */
char *TS_end_termcap_modes; /* "te" */
char *TS_termcap_modes; /* "ti" */
char *TS_visible_bell; /* "vb" */
char *TS_cursor_normal; /* "ve" */
char *TS_cursor_visible; /* "vs" */
char *TS_cursor_invisible; /* "vi" */
char *TS_set_window; /* "wi" (4 params, start and end of window,
each as vpos and hpos) */
/* Value of the "NC" (no_color_video) capability, or 0 if not
present. */
static int TN_no_color_video;
/* Meaning of bits in no_color_video. Each bit set means that the
corresponding attribute cannot be combined with colors. */
enum no_color_bit
{
NC_STANDOUT = 1 << 0,
NC_UNDERLINE = 1 << 1,
NC_REVERSE = 1 << 2,
NC_BLINK = 1 << 3,
NC_DIM = 1 << 4,
NC_BOLD = 1 << 5,
NC_INVIS = 1 << 6,
NC_PROTECT = 1 << 7,
NC_ALT_CHARSET = 1 << 8
};
/* "md" -- turn on bold (extra bright mode). */
char *TS_enter_bold_mode;
/* "mh" -- turn on half-bright mode. */
char *TS_enter_dim_mode;
/* "mb" -- enter blinking mode. */
char *TS_enter_blink_mode;
/* "mr" -- enter reverse video mode. */
char *TS_enter_reverse_mode;
/* "us"/"ue" -- start/end underlining. */
char *TS_exit_underline_mode, *TS_enter_underline_mode;
/* "ug" -- number of blanks left by underline. */
int TN_magic_cookie_glitch_ul;
/* "as"/"ae" -- start/end alternate character set. Not really
supported, yet. */
char *TS_enter_alt_charset_mode, *TS_exit_alt_charset_mode;
/* "me" -- switch appearances off. */
char *TS_exit_attribute_mode;
/* "Co" -- number of colors. */
int TN_max_colors;
/* "pa" -- max. number of color pairs on screen. Not handled yet.
Could be a problem if not equal to TN_max_colors * TN_max_colors. */
int TN_max_pairs;
/* "op" -- SVr4 set default pair to its original value. */
char *TS_orig_pair;
/* "AF"/"AB" or "Sf"/"Sb"-- set ANSI or SVr4 foreground/background color.
1 param, the color index. */
char *TS_set_foreground, *TS_set_background;
int TF_hazeltine; /* termcap hz flag. */
int TF_insmode_motion; /* termcap mi flag: can move while in insert mode. */
int TF_standout_motion; /* termcap mi flag: can move while in standout mode. */
int TF_underscore; /* termcap ul flag: _ underlines if over-struck on
non-blank position. Must clear before writing _. */
int TF_teleray; /* termcap xt flag: many weird consequences.
For t1061. */
int TF_xs; /* Nonzero for "xs". If set together with
TN_standout_width == 0, it means don't bother
to write any end-standout cookies. */
int TN_standout_width; /* termcap sg number: width occupied by standout
markers */
static int RPov; /* # chars to start a TS_repeat */
static int delete_in_insert_mode; /* delete mode == insert mode */
static int se_is_so; /* 1 if same string both enters and leaves
standout mode */
/* internal state */
/* The largest frame width in any call to calculate_costs. */
int max_frame_width;
/* The largest frame height in any call to calculate_costs. */
int max_frame_height;
/* Number of chars of space used for standout marker at beginning of line,
or'd with 0100. Zero if no standout marker at all.
The length of these vectors is max_frame_height.
Used IFF TN_standout_width >= 0. */
static char *chars_wasted;
static char *copybuf;
/* nonzero means supposed to write text in standout mode. */
int standout_requested;
int insert_mode; /* Nonzero when in insert mode. */
int standout_mode; /* Nonzero when in standout mode. */
/* Size of window specified by higher levels.
This is the number of lines, from the top of frame downwards,
which can participate in insert-line/delete-line operations.
Effectively it excludes the bottom frame_height - specified_window_size
lines from those operations. */
int specified_window;
/* Frame currently being redisplayed; 0 if not currently redisplaying.
(Direct output does not count). */
FRAME_PTR updating_frame;
/* Provided for lisp packages. */
static int system_uses_terminfo;
/* Flag used in tty_show/hide_cursor. */
static int tty_cursor_hidden;
char *tparam ();
extern char *tgetstr ();
#ifdef WINDOWSNT
/* We aren't X windows, but we aren't termcap either. This makes me
uncertain as to what value to use for frame.output_method. For
this file, we'll define FRAME_TERMCAP_P to be zero so that our
output hooks get called instead of the termcap functions. Probably
the best long-term solution is to define an output_windows_nt... */
#undef FRAME_TERMCAP_P
#define FRAME_TERMCAP_P(_f_) 0
#endif /* WINDOWSNT */
void
ring_bell ()
{
if (!NILP (Vring_bell_function))
{
Lisp_Object function;
/* Temporarily set the global variable to nil
so that if we get an error, it stays nil
and we don't call it over and over.
We don't specbind it, because that would carefully
restore the bad value if there's an error
and make the loop of errors happen anyway. */
function = Vring_bell_function;
Vring_bell_function = Qnil;
call0 (function);
Vring_bell_function = function;
}
else if (!FRAME_TERMCAP_P (XFRAME (selected_frame)))
(*ring_bell_hook) ();
else
OUTPUT (TS_visible_bell && visible_bell ? TS_visible_bell : TS_bell);
}
void
set_terminal_modes ()
{
if (FRAME_TERMCAP_P (XFRAME (selected_frame)))
{
OUTPUT_IF (TS_termcap_modes);
OUTPUT_IF (TS_cursor_visible);
OUTPUT_IF (TS_keypad_mode);
losecursor ();
}
else
(*set_terminal_modes_hook) ();
}
void
reset_terminal_modes ()
{
if (FRAME_TERMCAP_P (XFRAME (selected_frame)))
{
if (TN_standout_width < 0)
turn_off_highlight ();
turn_off_insert ();
OUTPUT_IF (TS_end_keypad_mode);
OUTPUT_IF (TS_cursor_normal);
OUTPUT_IF (TS_end_termcap_modes);
OUTPUT_IF (TS_orig_pair);
/* Output raw CR so kernel can track the cursor hpos. */
/* But on magic-cookie terminals this can erase an end-standout
marker and cause the rest of the frame to be in standout, so
move down first. */
if (TN_standout_width >= 0)
cmputc ('\n');
cmputc ('\r');
}
else if (reset_terminal_modes_hook)
(*reset_terminal_modes_hook) ();
}
void
update_begin (f)
struct frame *f;
{
updating_frame = f;
if (!FRAME_TERMCAP_P (f))
update_begin_hook (f);
}
void
update_end (f)
struct frame *f;
{
if (FRAME_TERMCAP_P (f))
{
if (!XWINDOW (selected_window)->cursor_off_p)
tty_show_cursor ();
turn_off_insert ();
background_highlight ();
standout_requested = 0;
}
else
update_end_hook (f);
updating_frame = NULL;
}
void
set_terminal_window (size)
int size;
{
if (FRAME_TERMCAP_P (updating_frame))
{
specified_window = size ? size : FRAME_HEIGHT (updating_frame);
if (scroll_region_ok)
set_scroll_region (0, specified_window);
}
else
set_terminal_window_hook (size);
}
void
set_scroll_region (start, stop)
int start, stop;
{
char *buf;
struct frame *sf = XFRAME (selected_frame);
if (TS_set_scroll_region)
buf = tparam (TS_set_scroll_region, 0, 0, start, stop - 1);
else if (TS_set_scroll_region_1)
buf = tparam (TS_set_scroll_region_1, 0, 0,
FRAME_HEIGHT (sf), start,
FRAME_HEIGHT (sf) - stop,
FRAME_HEIGHT (sf));
else
buf = tparam (TS_set_window, 0, 0, start, 0, stop, FRAME_WIDTH (sf));
OUTPUT (buf);
xfree (buf);
losecursor ();
}
static void
turn_on_insert ()
{
if (!insert_mode)
OUTPUT (TS_insert_mode);
insert_mode = 1;
}
void
turn_off_insert ()
{
if (insert_mode)
OUTPUT (TS_end_insert_mode);
insert_mode = 0;
}
/* Handle highlighting when TN_standout_width (termcap sg) is not specified.
In these terminals, output is affected by the value of standout
mode when the output is written.
These functions are called on all terminals, but do nothing
on terminals whose standout mode does not work that way. */
void
turn_off_highlight ()
{
if (TN_standout_width < 0)
{
if (standout_mode)
OUTPUT_IF (TS_end_standout_mode);
standout_mode = 0;
}
}
static void
turn_on_highlight ()
{
if (TN_standout_width < 0)
{
if (!standout_mode)
OUTPUT_IF (TS_standout_mode);
standout_mode = 1;
}
}
static void
toggle_highlight ()
{
if (standout_mode)
turn_off_highlight ();
else
turn_on_highlight ();
}
/* Make cursor invisible. */
static void
tty_hide_cursor ()
{
if (tty_cursor_hidden == 0)
{
tty_cursor_hidden = 1;
OUTPUT_IF (TS_cursor_invisible);
}
}
/* Ensure that cursor is visible. */
static void
tty_show_cursor ()
{
if (tty_cursor_hidden)
{
tty_cursor_hidden = 0;
OUTPUT_IF (TS_cursor_normal);
OUTPUT_IF (TS_cursor_visible);
}
}
/* Set standout mode to the state it should be in for
empty space inside windows. What this is,
depends on the user option inverse-video. */
void
background_highlight ()
{
if (TN_standout_width >= 0)
return;
if (inverse_video)
turn_on_highlight ();
else
turn_off_highlight ();
}
/* Set standout mode to the mode specified for the text to be output. */
static void
highlight_if_desired ()
{
if (TN_standout_width >= 0)
return;
if (!inverse_video == !standout_requested)
turn_off_highlight ();
else
turn_on_highlight ();
}
/* Handle standout mode for terminals in which TN_standout_width >= 0.
On these terminals, standout is controlled by markers that
live inside the terminal's memory. TN_standout_width is the width
that the marker occupies in memory. Standout runs from the marker
to the end of the line on some terminals, or to the next
turn-off-standout marker (TS_end_standout_mode) string
on other terminals. */
/* Write a standout marker or end-standout marker at the front of the line
at vertical position vpos. */
static void
write_standout_marker (flag, vpos)
int flag, vpos;
{
if (flag
|| (TS_end_standout_mode && !TF_teleray && !se_is_so
&& !(TF_xs && TN_standout_width == 0)))
{
cmgoto (vpos, 0);
cmplus (TN_standout_width);
OUTPUT (flag ? TS_standout_mode : TS_end_standout_mode);
chars_wasted[curY] = TN_standout_width | 0100;
}
}
/* External interface to control of standout mode.
Call this when about to modify line at position VPOS
and not change whether it is highlighted. */
void
reassert_line_highlight (highlight, vpos)
int highlight;
int vpos;
{
struct frame *f = updating_frame ? updating_frame : XFRAME (selected_frame);
if (! FRAME_TERMCAP_P (f))
{
(*reassert_line_highlight_hook) (highlight, vpos);
return;
}
if (TN_standout_width < 0)
/* Handle terminals where standout takes affect at output time */
standout_requested = highlight;
else if (chars_wasted && chars_wasted[vpos] == 0)
/* For terminals with standout markers, write one on this line
if there isn't one already. */
write_standout_marker (inverse_video ? !highlight : highlight, vpos);
}
/* Call this when about to modify line at position VPOS
and change whether it is highlighted. */
void
change_line_highlight (new_highlight, vpos, y, first_unused_hpos)
int new_highlight, vpos, y, first_unused_hpos;
{
standout_requested = new_highlight;
if (! FRAME_TERMCAP_P (updating_frame))
{
(*change_line_highlight_hook) (new_highlight, vpos, y, first_unused_hpos);
return;
}
cursor_to (vpos, 0);
if (TN_standout_width < 0)
background_highlight ();
/* If line starts with a marker, delete the marker */
else if (TS_clr_line && chars_wasted[curY])
{
turn_off_insert ();
/* On Teleray, make sure to erase the SO marker. */
if (TF_teleray)
{
cmgoto (curY - 1, FRAME_WIDTH (XFRAME (selected_frame)) - 4);
OUTPUT ("\033S");
curY++; /* ESC S moves to next line where the TS_standout_mode was */
curX = 0;
}
else
cmgoto (curY, 0); /* reposition to kill standout marker */
}
clear_end_of_line_raw (first_unused_hpos);
reassert_line_highlight (new_highlight, curY);
}
/* Move cursor to row/column position VPOS/HPOS. HPOS/VPOS are
frame-relative coordinates. */
void
cursor_to (vpos, hpos)
int vpos, hpos;
{
struct frame *f = updating_frame ? updating_frame : XFRAME (selected_frame);
if (! FRAME_TERMCAP_P (f) && cursor_to_hook)
{
(*cursor_to_hook) (vpos, hpos);
return;
}
/* Detect the case where we are called from reset_sys_modes
and the costs have never been calculated. Do nothing. */
if (chars_wasted == 0)
return;
hpos += chars_wasted[vpos] & 077;
if (curY == vpos && curX == hpos)
return;
if (!TF_standout_motion)
background_highlight ();
if (!TF_insmode_motion)
turn_off_insert ();
cmgoto (vpos, hpos);
}
/* Similar but don't take any account of the wasted characters. */
void
raw_cursor_to (row, col)
int row, col;
{
struct frame *f = updating_frame ? updating_frame : XFRAME (selected_frame);
if (! FRAME_TERMCAP_P (f))
{
(*raw_cursor_to_hook) (row, col);
return;
}
if (curY == row && curX == col)
return;
if (!TF_standout_motion)
background_highlight ();
if (!TF_insmode_motion)
turn_off_insert ();
cmgoto (row, col);
}
/* Erase operations */
/* clear from cursor to end of frame */
void
clear_to_end ()
{
register int i;
if (clear_to_end_hook && ! FRAME_TERMCAP_P (updating_frame))
{
(*clear_to_end_hook) ();
return;
}
if (TS_clr_to_bottom)
{
background_highlight ();
OUTPUT (TS_clr_to_bottom);
bzero (chars_wasted + curY,
FRAME_HEIGHT (XFRAME (selected_frame)) - curY);
}
else
{
for (i = curY; i < FRAME_HEIGHT (XFRAME (selected_frame)); i++)
{
cursor_to (i, 0);
clear_end_of_line_raw (FRAME_WIDTH (XFRAME (selected_frame)));
}
}
}
/* Clear entire frame */
void
clear_frame ()
{
struct frame *sf = XFRAME (selected_frame);
if (clear_frame_hook
&& ! FRAME_TERMCAP_P ((updating_frame ? updating_frame : sf)))
{
(*clear_frame_hook) ();
return;
}
if (TS_clr_frame)
{
background_highlight ();
OUTPUT (TS_clr_frame);
bzero (chars_wasted, FRAME_HEIGHT (sf));
cmat (0, 0);
}
else
{
cursor_to (0, 0);
clear_to_end ();
}
}
/* Clear to end of line, but do not clear any standout marker.
Assumes that the cursor is positioned at a character of real text,
which implies it cannot be before a standout marker
unless the marker has zero width.
Note that the cursor may be moved. */
void
clear_end_of_line (first_unused_hpos)
int first_unused_hpos;
{
if (FRAME_TERMCAP_P (XFRAME (selected_frame))
&& chars_wasted != 0
&& TN_standout_width == 0 && curX == 0 && chars_wasted[curY] != 0)
write_glyphs (&space_glyph, 1);
clear_end_of_line_raw (first_unused_hpos);
}
/* Clear from cursor to end of line.
Assume that the line is already clear starting at column first_unused_hpos.
If the cursor is at a standout marker, erase the marker.
Note that the cursor may be moved, on terminals lacking a `ce' string. */
void
clear_end_of_line_raw (first_unused_hpos)
int first_unused_hpos;
{
register int i;
if (clear_end_of_line_hook
&& ! FRAME_TERMCAP_P ((updating_frame
? updating_frame
: XFRAME (selected_frame))))
{
(*clear_end_of_line_hook) (first_unused_hpos);
return;
}
/* Detect the case where we are called from reset_sys_modes
and the costs have never been calculated. Do nothing. */
if (chars_wasted == 0)
return;
first_unused_hpos += chars_wasted[curY] & 077;
if (curX >= first_unused_hpos)
return;
/* Notice if we are erasing a magic cookie */
if (curX == 0)
chars_wasted[curY] = 0;
background_highlight ();
if (TS_clr_line)
{
OUTPUT1 (TS_clr_line);
}
else
{ /* have to do it the hard way */
struct frame *sf = XFRAME (selected_frame);
turn_off_insert ();
/* Do not write in last row last col with Auto-wrap on. */
if (AutoWrap && curY == FRAME_HEIGHT (sf) - 1
&& first_unused_hpos == FRAME_WIDTH (sf))
first_unused_hpos--;
for (i = curX; i < first_unused_hpos; i++)
{
if (termscript)
fputc (' ', termscript);
putchar (' ');
}
cmplus (first_unused_hpos - curX);
}
}
/* Encode SRC_LEN glyphs starting at SRC to terminal output codes and
store them at DST. Do not write more than DST_LEN bytes. That may
require stopping before all SRC_LEN input glyphs have been
converted.
We store the number of glyphs actually converted in *CONSUMED. The
return value is the number of bytes store in DST. */
int
encode_terminal_code (src, dst, src_len, dst_len, consumed)
struct glyph *src;
int src_len;
unsigned char *dst;
int dst_len, *consumed;
{
struct glyph *src_start = src, *src_end = src + src_len;
unsigned char *dst_start = dst, *dst_end = dst + dst_len;
register GLYPH g;
unsigned char workbuf[MAX_MULTIBYTE_LENGTH], *buf;
int len;
register int tlen = GLYPH_TABLE_LENGTH;
register Lisp_Object *tbase = GLYPH_TABLE_BASE;
int result;
struct coding_system *coding;
/* If terminal_coding does any conversion, use it, otherwise use
safe_terminal_coding. We can't use CODING_REQUIRE_ENCODING here
because it always return 1 if the member src_multibyte is 1. */
coding = (terminal_coding.common_flags & CODING_REQUIRE_ENCODING_MASK
? &terminal_coding
: &safe_terminal_coding);
while (src < src_end)
{
/* We must skip glyphs to be padded for a wide character. */
if (! CHAR_GLYPH_PADDING_P (*src))
{
g = GLYPH_FROM_CHAR_GLYPH (src[0]);
if (g < 0 || g >= tlen)
{
/* This glyph doesn't has an entry in Vglyph_table. */
if (! CHAR_VALID_P (src->u.ch, 0))
{