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- Committer: Bazaar Package Importer
- Author(s): Junichi Uekawa
- Date: 2008-03-23 21:42:49 UTC
- mfrom: (3.1.6 hardy)
- Revision ID: james.westby@ubuntu.com-20080323214249-evlfv3y1o8q747la
Tags: 2.4.6.1-2
* Bug fix: "FTBFS with GCC 4.3: missing #includes", thanks to Martin
Michlmayr (Closes: #454890).
- 13_gcc4: updated
Michlmayr (Closes: #454890).
- 13_gcc4: updated
- files added:
- debian/patches/13_gcc4.3.dpatch
- files removed:
- debian/patches/10_unprotect_filename_with_comma.dpatch
- readline-4.0
- files modified:
- AUTHORS
added
removed
readline-4.0/display.c
1
/* display.c -- readline redisplay facility. */
2
3
/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
4
5
This file is part of the GNU Readline Library, a library for
6
reading lines of text with interactive input and history editing.
7
8
The GNU Readline Library is free software; you can redistribute it
9
and/or modify it under the terms of the GNU General Public License
10
as published by the Free Software Foundation; either version 1, or
11
(at your option) any later version.
12
13
The GNU Readline Library is distributed in the hope that it will be
14
useful, but WITHOUT ANY WARRANTY; without even the implied warranty
15
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
GNU General Public License for more details.
17
18
The GNU General Public License is often shipped with GNU software, and
19
is generally kept in a file called COPYING or LICENSE. If you do not
20
have a copy of the license, write to the Free Software Foundation,
21
675 Mass Ave, Cambridge, MA 02139, USA. */
22
#define READLINE_LIBRARY
23
24
#if defined (HAVE_CONFIG_H)
25
# include <config.h>
26
#endif
27
28
#include <sys/types.h>
29
30
#if defined (HAVE_UNISTD_H)
31
# include <unistd.h>
32
#endif /* HAVE_UNISTD_H */
33
34
#include "posixstat.h"
35
36
#if defined (HAVE_STDLIB_H)
37
# include <stdlib.h>
38
#else
39
# include "ansi_stdlib.h"
40
#endif /* HAVE_STDLIB_H */
41
42
#include <stdio.h>
43
44
#if defined (__GO32__)
45
# include <go32.h>
46
# include <pc.h>
47
#endif /* __GO32__ */
48
49
/* System-specific feature definitions and include files. */
50
#include "rldefs.h"
51
52
/* Termcap library stuff. */
53
#include "tcap.h"
54
55
/* Some standard library routines. */
56
#include "readline.h"
57
#include "history.h"
58
59
#if !defined (strchr) && !defined (__STDC__)
60
extern char *strchr (), *strrchr ();
61
#endif /* !strchr && !__STDC__ */
62
63
/* Global and pseudo-global variables and functions
64
imported from readline.c. */
65
extern char *rl_prompt;
66
extern int readline_echoing_p;
67
68
extern int _rl_output_meta_chars;
69
extern int _rl_horizontal_scroll_mode;
70
extern int _rl_mark_modified_lines;
71
extern int _rl_prefer_visible_bell;
72
73
/* Variables and functions imported from terminal.c */
74
extern void _rl_output_some_chars ();
75
#ifdef _MINIX
76
extern void _rl_output_character_function ();
77
#else
78
extern int _rl_output_character_function ();
79
#endif
80
extern int _rl_backspace ();
81
82
extern char *term_clreol, *term_clrpag;
83
extern char *term_im, *term_ic, *term_ei, *term_DC;
84
extern char *term_up, *term_dc, *term_cr, *term_IC;
85
extern int screenheight, screenwidth, screenchars;
86
extern int terminal_can_insert, _rl_term_autowrap;
87
88
/* Pseudo-global functions (local to the readline library) exported
89
by this file. */
90
void _rl_move_cursor_relative (), _rl_output_some_chars ();
91
void _rl_move_vert ();
92
void _rl_clear_to_eol (), _rl_clear_screen ();
93
94
static void update_line (), space_to_eol ();
95
static void delete_chars (), insert_some_chars ();
96
static void cr ();
97
98
static int *inv_lbreaks, *vis_lbreaks;
99
100
extern char *xmalloc (), *xrealloc ();
101
102
/* Heuristic used to decide whether it is faster to move from CUR to NEW
103
by backing up or outputting a carriage return and moving forward. */
104
#define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new)))
105
106
/* **************************************************************** */
107
/* */
108
/* Display stuff */
109
/* */
110
/* **************************************************************** */
111
112
/* This is the stuff that is hard for me. I never seem to write good
113
display routines in C. Let's see how I do this time. */
114
115
/* (PWP) Well... Good for a simple line updater, but totally ignores
116
the problems of input lines longer than the screen width.
117
118
update_line and the code that calls it makes a multiple line,
119
automatically wrapping line update. Careful attention needs
120
to be paid to the vertical position variables. */
121
122
/* Keep two buffers; one which reflects the current contents of the
123
screen, and the other to draw what we think the new contents should
124
be. Then compare the buffers, and make whatever changes to the
125
screen itself that we should. Finally, make the buffer that we
126
just drew into be the one which reflects the current contents of the
127
screen, and place the cursor where it belongs.
128
129
Commands that want to can fix the display themselves, and then let
130
this function know that the display has been fixed by setting the
131
RL_DISPLAY_FIXED variable. This is good for efficiency. */
132
133
/* Application-specific redisplay function. */
134
VFunction *rl_redisplay_function = rl_redisplay;
135
136
/* Global variables declared here. */
137
/* What YOU turn on when you have handled all redisplay yourself. */
138
int rl_display_fixed = 0;
139
140
int _rl_suppress_redisplay = 0;
141
142
/* The stuff that gets printed out before the actual text of the line.
143
This is usually pointing to rl_prompt. */
144
char *rl_display_prompt = (char *)NULL;
145
146
/* Pseudo-global variables declared here. */
147
/* The visible cursor position. If you print some text, adjust this. */
148
int _rl_last_c_pos = 0;
149
int _rl_last_v_pos = 0;
150
151
/* Number of lines currently on screen minus 1. */
152
int _rl_vis_botlin = 0;
153
154
/* Variables used only in this file. */
155
/* The last left edge of text that was displayed. This is used when
156
doing horizontal scrolling. It shifts in thirds of a screenwidth. */
157
static int last_lmargin;
158
159
/* The line display buffers. One is the line currently displayed on
160
the screen. The other is the line about to be displayed. */
161
static char *visible_line = (char *)NULL;
162
static char *invisible_line = (char *)NULL;
163
164
/* A buffer for `modeline' messages. */
165
static char msg_buf[128];
166
167
/* Non-zero forces the redisplay even if we thought it was unnecessary. */
168
static int forced_display;
169
170
/* Default and initial buffer size. Can grow. */
171
static int line_size = 1024;
172
173
static char *local_prompt, *local_prompt_prefix;
174
static int visible_length, prefix_length;
175
176
/* The number of invisible characters in the line currently being
177
displayed on the screen. */
178
static int visible_wrap_offset;
179
180
/* static so it can be shared between rl_redisplay and update_line */
181
static int wrap_offset;
182
183
/* The index of the last invisible_character in the prompt string. */
184
static int last_invisible;
185
186
/* The length (buffer offset) of the first line of the last (possibly
187
multi-line) buffer displayed on the screen. */
188
static int visible_first_line_len;
189
190
/* Expand the prompt string S and return the number of visible
191
characters in *LP, if LP is not null. This is currently more-or-less
192
a placeholder for expansion. LIP, if non-null is a place to store the
193
index of the last invisible character in ther eturned string. */
194
195
/* Current implementation:
196
\001 (^A) start non-visible characters
197
\002 (^B) end non-visible characters
198
all characters except \001 and \002 (following a \001) are copied to
199
the returned string; all characters except those between \001 and
200
\002 are assumed to be `visible'. */
201
202
static char *
203
expand_prompt (pmt, lp, lip)
204
char *pmt;
205
int *lp, *lip;
206
{
207
char *r, *ret, *p;
208
int l, rl, last, ignoring;
209
210
/* Short-circuit if we can. */
211
if (strchr (pmt, RL_PROMPT_START_IGNORE) == 0)
212
{
213
r = savestring (pmt);
214
if (lp)
215
*lp = strlen (r);
216
return r;
217
}
218
219
l = strlen (pmt);
220
r = ret = xmalloc (l + 1);
221
222
for (rl = ignoring = last = 0, p = pmt; p && *p; p++)
223
{
224
/* This code strips the invisible character string markers
225
RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */
226
if (*p == RL_PROMPT_START_IGNORE)
227
{
228
ignoring++;
229
continue;
230
}
231
else if (ignoring && *p == RL_PROMPT_END_IGNORE)
232
{
233
ignoring = 0;
234
last = r - ret - 1;
235
continue;
236
}
237
else
238
{
239
*r++ = *p;
240
if (!ignoring)
241
rl++;
242
}
243
}
244
245
*r = '\0';
246
if (lp)
247
*lp = rl;
248
if (lip)
249
*lip = last;
250
return ret;
251
}
252
253
/*
254
* Expand the prompt string into the various display components, if
255
* necessary.
256
*
257
* local_prompt = expanded last line of string in rl_display_prompt
258
* (portion after the final newline)
259
* local_prompt_prefix = portion before last newline of rl_display_prompt,
260
* expanded via expand_prompt
261
* visible_length = number of visible characters in local_prompt
262
* prefix_length = number of visible characters in local_prompt_prefix
263
*
264
* This function is called once per call to readline(). It may also be
265
* called arbitrarily to expand the primary prompt.
266
*
267
* The return value is the number of visible characters on the last line
268
* of the (possibly multi-line) prompt.
269
*/
270
int
271
rl_expand_prompt (prompt)
272
char *prompt;
273
{
274
char *p, *t;
275
int c;
276
277
/* Clear out any saved values. */
278
if (local_prompt)
279
free (local_prompt);
280
if (local_prompt_prefix)
281
free (local_prompt_prefix);
282
local_prompt = local_prompt_prefix = (char *)0;
283
last_invisible = visible_length = 0;
284
285
if (prompt == 0 || *prompt == 0)
286
return (0);
287
288
p = strrchr (prompt, '\n');
289
if (!p)
290
{
291
/* The prompt is only one line. */
292
local_prompt = expand_prompt (prompt, &visible_length, &last_invisible);
293
local_prompt_prefix = (char *)0;
294
return (visible_length);
295
}
296
else
297
{
298
/* The prompt spans multiple lines. */
299
t = ++p;
300
local_prompt = expand_prompt (p, &visible_length, &last_invisible);
301
c = *t; *t = '\0';
302
/* The portion of the prompt string up to and including the
303
final newline is now null-terminated. */
304
local_prompt_prefix = expand_prompt (prompt, &prefix_length, (int *)NULL);
305
*t = c;
306
return (prefix_length);
307
}
308
}
309
310
/* Basic redisplay algorithm. */
311
void
312
rl_redisplay ()
313
{
314
register int in, out, c, linenum, cursor_linenum;
315
register char *line;
316
int c_pos, inv_botlin, lb_botlin, lb_linenum;
317
int newlines, lpos, temp;
318
char *prompt_this_line;
319
320
if (!readline_echoing_p)
321
return;
322
323
if (!rl_display_prompt)
324
rl_display_prompt = "";
325
326
if (invisible_line == 0)
327
{
328
visible_line = xmalloc (line_size);
329
invisible_line = xmalloc (line_size);
330
for (in = 0; in < line_size; in++)
331
{
332
visible_line[in] = 0;
333
invisible_line[in] = 1;
334
}
335
336
/* should be enough, but then again, this is just for testing. */
337
inv_lbreaks = (int *)malloc (256 * sizeof (int));
338
vis_lbreaks = (int *)malloc (256 * sizeof (int));
339
inv_lbreaks[0] = vis_lbreaks[0] = 0;
340
341
rl_on_new_line ();
342
}
343
344
/* Draw the line into the buffer. */
345
c_pos = -1;
346
347
line = invisible_line;
348
out = inv_botlin = 0;
349
350
/* Mark the line as modified or not. We only do this for history
351
lines. */
352
if (_rl_mark_modified_lines && current_history () && rl_undo_list)
353
{
354
line[out++] = '*';
355
line[out] = '\0';
356
}
357
358
/* If someone thought that the redisplay was handled, but the currently
359
visible line has a different modification state than the one about
360
to become visible, then correct the caller's misconception. */
361
if (visible_line[0] != invisible_line[0])
362
rl_display_fixed = 0;
363
364
/* If the prompt to be displayed is the `primary' readline prompt (the
365
one passed to readline()), use the values we have already expanded.
366
If not, use what's already in rl_display_prompt. WRAP_OFFSET is the
367
number of non-visible characters in the prompt string. */
368
if (rl_display_prompt == rl_prompt || local_prompt)
369
{
370
int local_len = local_prompt ? strlen (local_prompt) : 0;
371
if (local_prompt_prefix && forced_display)
372
_rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix));
373
374
if (local_len > 0)
375
{
376
temp = local_len + out + 2;
377
if (temp >= line_size)
378
{
379
line_size = (temp + 1024) - (temp % 1024);
380
visible_line = xrealloc (visible_line, line_size);
381
line = invisible_line = xrealloc (invisible_line, line_size);
382
}
383
strncpy (line + out, local_prompt, local_len);
384
out += local_len;
385
}
386
line[out] = '\0';
387
wrap_offset = local_len - visible_length;
388
}
389
else
390
{
391
int pmtlen;
392
prompt_this_line = strrchr (rl_display_prompt, '\n');
393
if (!prompt_this_line)
394
prompt_this_line = rl_display_prompt;
395
else
396
{
397
prompt_this_line++;
398
if (forced_display)
399
{
400
_rl_output_some_chars (rl_display_prompt, prompt_this_line - rl_display_prompt);
401
/* Make sure we are at column zero even after a newline,
402
regardless of the state of terminal output processing. */
403
if (prompt_this_line[-2] != '\r')
404
cr ();
405
}
406
}
407
408
pmtlen = strlen (prompt_this_line);
409
temp = pmtlen + out + 2;
410
if (temp >= line_size)
411
{
412
line_size = (temp + 1024) - (temp % 1024);
413
visible_line = xrealloc (visible_line, line_size);
414
line = invisible_line = xrealloc (invisible_line, line_size);
415
}
416
strncpy (line + out, prompt_this_line, pmtlen);
417
out += pmtlen;
418
line[out] = '\0';
419
wrap_offset = 0;
420
}
421
422
#define CHECK_LPOS() \
423
do { \
424
lpos++; \
425
if (lpos >= screenwidth) \
426
{ \
427
inv_lbreaks[++newlines] = out; \
428
lpos = 0; \
429
} \
430
} while (0)
431
432
/* inv_lbreaks[i] is where line i starts in the buffer. */
433
inv_lbreaks[newlines = 0] = 0;
434
lpos = out - wrap_offset;
435
436
/* XXX - what if lpos is already >= screenwidth before we start drawing the
437
contents of the command line? */
438
while (lpos >= screenwidth)
439
{
440
#if 0
441
temp = ((newlines + 1) * screenwidth) - ((newlines == 0) ? wrap_offset : 0);
442
#else
443
/* XXX - possible fix from Darin Johnson <darin@acuson.com> for prompt
444
string with invisible characters that is longer than the screen
445
width. */
446
temp = ((newlines + 1) * screenwidth) + ((newlines == 0) ? wrap_offset : 0);
447
#endif
448
inv_lbreaks[++newlines] = temp;
449
lpos -= screenwidth;
450
}
451
452
lb_linenum = 0;
453
for (in = 0; in < rl_end; in++)
454
{
455
c = (unsigned char)rl_line_buffer[in];
456
457
if (out + 8 >= line_size) /* XXX - 8 for \t */
458
{
459
line_size *= 2;
460
visible_line = xrealloc (visible_line, line_size);
461
invisible_line = xrealloc (invisible_line, line_size);
462
line = invisible_line;
463
}
464
465
if (in == rl_point)
466
{
467
c_pos = out;
468
lb_linenum = newlines;
469
}
470
471
if (META_CHAR (c))
472
{
473
if (_rl_output_meta_chars == 0)
474
{
475
sprintf (line + out, "\\%o", c);
476
477
if (lpos + 4 >= screenwidth)
478
{
479
temp = screenwidth - lpos;
480
inv_lbreaks[++newlines] = out + temp;
481
lpos = 4 - temp;
482
}
483
else
484
lpos += 4;
485
486
out += 4;
487
}
488
else
489
{
490
line[out++] = c;
491
CHECK_LPOS();
492
}
493
}
494
#if defined (DISPLAY_TABS)
495
else if (c == '\t')
496
{
497
register int temp, newout;
498
499
#if 0
500
newout = (out | (int)7) + 1;
501
#else
502
newout = out + 8 - lpos % 8;
503
#endif
504
temp = newout - out;
505
if (lpos + temp >= screenwidth)
506
{
507
register int temp2;
508
temp2 = screenwidth - lpos;
509
inv_lbreaks[++newlines] = out + temp2;
510
lpos = temp - temp2;
511
while (out < newout)
512
line[out++] = ' ';
513
}
514
else
515
{
516
while (out < newout)
517
line[out++] = ' ';
518
lpos += temp;
519
}
520
}
521
#endif
522
else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && term_up && *term_up)
523
{
524
line[out++] = '\0'; /* XXX - sentinel */
525
inv_lbreaks[++newlines] = out;
526
lpos = 0;
527
}
528
else if (CTRL_CHAR (c) || c == RUBOUT)
529
{
530
line[out++] = '^';
531
CHECK_LPOS();
532
line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?';
533
CHECK_LPOS();
534
}
535
else
536
{
537
line[out++] = c;
538
CHECK_LPOS();
539
}
540
}
541
line[out] = '\0';
542
if (c_pos < 0)
543
{
544
c_pos = out;
545
lb_linenum = newlines;
546
}
547
548
inv_botlin = lb_botlin = newlines;
549
inv_lbreaks[newlines+1] = out;
550
cursor_linenum = lb_linenum;
551
552
/* C_POS == position in buffer where cursor should be placed. */
553
554
/* PWP: now is when things get a bit hairy. The visible and invisible
555
line buffers are really multiple lines, which would wrap every
556
(screenwidth - 1) characters. Go through each in turn, finding
557
the changed region and updating it. The line order is top to bottom. */
558
559
/* If we can move the cursor up and down, then use multiple lines,
560
otherwise, let long lines display in a single terminal line, and
561
horizontally scroll it. */
562
563
if (_rl_horizontal_scroll_mode == 0 && term_up && *term_up)
564
{
565
int nleft, pos, changed_screen_line;
566
567
if (!rl_display_fixed || forced_display)
568
{
569
forced_display = 0;
570
571
/* If we have more than a screenful of material to display, then
572
only display a screenful. We should display the last screen,
573
not the first. */
574
if (out >= screenchars)
575
out = screenchars - 1;
576
577
/* The first line is at character position 0 in the buffer. The
578
second and subsequent lines start at inv_lbreaks[N], offset by
579
OFFSET (which has already been calculated above). */
580
581
#define W_OFFSET(line, offset) ((line) == 0 ? offset : 0)
582
#define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l]))
583
#define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l])
584
#define VIS_CHARS(line) (visible_line + vis_lbreaks[line])
585
#define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line)
586
#define INV_LINE(line) (invisible_line + inv_lbreaks[line])
587
588
/* For each line in the buffer, do the updating display. */
589
for (linenum = 0; linenum <= inv_botlin; linenum++)
590
{
591
update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum,
592
VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin);
593
594
/* If this is the line with the prompt, we might need to
595
compensate for invisible characters in the new line. Do
596
this only if there is not more than one new line (which
597
implies that we completely overwrite the old visible line)
598
and the new line is shorter than the old. Make sure we are
599
at the end of the new line before clearing. */
600
if (linenum == 0 &&
601
inv_botlin == 0 && _rl_last_c_pos == out &&
602
(wrap_offset > visible_wrap_offset) &&
603
(_rl_last_c_pos < visible_first_line_len))
604
{
605
nleft = screenwidth + wrap_offset - _rl_last_c_pos;
606
if (nleft)
607
_rl_clear_to_eol (nleft);
608
}
609
610
/* Since the new first line is now visible, save its length. */
611
if (linenum == 0)
612
visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset;
613
}
614
615
/* We may have deleted some lines. If so, clear the left over
616
blank ones at the bottom out. */
617
if (_rl_vis_botlin > inv_botlin)
618
{
619
char *tt;
620
for (; linenum <= _rl_vis_botlin; linenum++)
621
{
622
tt = VIS_CHARS (linenum);
623
_rl_move_vert (linenum);
624
_rl_move_cursor_relative (0, tt);
625
_rl_clear_to_eol
626
((linenum == _rl_vis_botlin) ? strlen (tt) : screenwidth);
627
}
628
}
629
_rl_vis_botlin = inv_botlin;
630
631
/* CHANGED_SCREEN_LINE is set to 1 if we have moved to a
632
different screen line during this redisplay. */
633
changed_screen_line = _rl_last_v_pos != cursor_linenum;
634
if (changed_screen_line)
635
{
636
_rl_move_vert (cursor_linenum);
637
/* If we moved up to the line with the prompt using term_up,
638
the physical cursor position on the screen stays the same,
639
but the buffer position needs to be adjusted to account
640
for invisible characters. */
641
if (cursor_linenum == 0 && wrap_offset)
642
_rl_last_c_pos += wrap_offset;
643
}
644
645
/* We have to reprint the prompt if it contains invisible
646
characters, since it's not generally OK to just reprint
647
the characters from the current cursor position. But we
648
only need to reprint it if the cursor is before the last
649
invisible character in the prompt string. */
650
nleft = visible_length + wrap_offset;
651
if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 &&
652
_rl_last_c_pos <= last_invisible && local_prompt)
653
{
654
if (term_cr)
655
tputs (term_cr, 1, _rl_output_character_function);
656
_rl_output_some_chars (local_prompt, nleft);
657
_rl_last_c_pos = nleft;
658
}
659
660
/* Where on that line? And where does that line start
661
in the buffer? */
662
pos = inv_lbreaks[cursor_linenum];
663
/* nleft == number of characters in the line buffer between the
664
start of the line and the cursor position. */
665
nleft = c_pos - pos;
666
667
/* Since _rl_backspace() doesn't know about invisible characters in the
668
prompt, and there's no good way to tell it, we compensate for
669
those characters here and call _rl_backspace() directly. */
670
if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos)
671
{
672
_rl_backspace (_rl_last_c_pos - nleft);
673
_rl_last_c_pos = nleft;
674
}
675
676
if (nleft != _rl_last_c_pos)
677
_rl_move_cursor_relative (nleft, &invisible_line[pos]);
678
}
679
}
680
else /* Do horizontal scrolling. */
681
{
682
#define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0)
683
int lmargin, ndisp, nleft, phys_c_pos, t;
684
685
/* Always at top line. */
686
_rl_last_v_pos = 0;
687
688
/* Compute where in the buffer the displayed line should start. This
689
will be LMARGIN. */
690
691
/* The number of characters that will be displayed before the cursor. */
692
ndisp = c_pos - wrap_offset;
693
nleft = visible_length + wrap_offset;
694
/* Where the new cursor position will be on the screen. This can be
695
longer than SCREENWIDTH; if it is, lmargin will be adjusted. */
696
phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset);
697
t = screenwidth / 3;
698
699
/* If the number of characters had already exceeded the screenwidth,
700
last_lmargin will be > 0. */
701
702
/* If the number of characters to be displayed is more than the screen
703
width, compute the starting offset so that the cursor is about
704
two-thirds of the way across the screen. */
705
if (phys_c_pos > screenwidth - 2)
706
{
707
lmargin = c_pos - (2 * t);
708
if (lmargin < 0)
709
lmargin = 0;
710
/* If the left margin would be in the middle of a prompt with
711
invisible characters, don't display the prompt at all. */
712
if (wrap_offset && lmargin > 0 && lmargin < nleft)
713
lmargin = nleft;
714
}
715
else if (ndisp < screenwidth - 2) /* XXX - was -1 */
716
lmargin = 0;
717
else if (phys_c_pos < 1)
718
{
719
/* If we are moving back towards the beginning of the line and
720
the last margin is no longer correct, compute a new one. */
721
lmargin = ((c_pos - 1) / t) * t; /* XXX */
722
if (wrap_offset && lmargin > 0 && lmargin < nleft)
723
lmargin = nleft;
724
}
725
else
726
lmargin = last_lmargin;
727
728
/* If the first character on the screen isn't the first character
729
in the display line, indicate this with a special character. */
730
if (lmargin > 0)
731
line[lmargin] = '<';
732
733
/* If SCREENWIDTH characters starting at LMARGIN do not encompass
734
the whole line, indicate that with a special character at the
735
right edge of the screen. If LMARGIN is 0, we need to take the
736
wrap offset into account. */
737
t = lmargin + M_OFFSET (lmargin, wrap_offset) + screenwidth;
738
if (t < out)
739
line[t - 1] = '>';
740
741
if (!rl_display_fixed || forced_display || lmargin != last_lmargin)
742
{
743
forced_display = 0;
744
update_line (&visible_line[last_lmargin],
745
&invisible_line[lmargin],
746
0,
747
screenwidth + visible_wrap_offset,
748
screenwidth + (lmargin ? 0 : wrap_offset),
749
0);
750
751
/* If the visible new line is shorter than the old, but the number
752
of invisible characters is greater, and we are at the end of
753
the new line, we need to clear to eol. */
754
t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset);
755
if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) &&
756
(_rl_last_c_pos == out) &&
757
t < visible_first_line_len)
758
{
759
nleft = screenwidth - t;
760
_rl_clear_to_eol (nleft);
761
}
762
visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset);
763
if (visible_first_line_len > screenwidth)
764
visible_first_line_len = screenwidth;
765
766
_rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]);
767
last_lmargin = lmargin;
768
}
769
}
770
fflush (rl_outstream);
771
772
/* Swap visible and non-visible lines. */
773
{
774
char *temp = visible_line;
775
int *itemp = vis_lbreaks;
776
visible_line = invisible_line;
777
invisible_line = temp;
778
vis_lbreaks = inv_lbreaks;
779
inv_lbreaks = itemp;
780
rl_display_fixed = 0;
781
/* If we are displaying on a single line, and last_lmargin is > 0, we
782
are not displaying any invisible characters, so set visible_wrap_offset
783
to 0. */
784
if (_rl_horizontal_scroll_mode && last_lmargin)
785
visible_wrap_offset = 0;
786
else
787
visible_wrap_offset = wrap_offset;
788
}
789
}
790
791
/* PWP: update_line() is based on finding the middle difference of each
792
line on the screen; vis:
793
794
/old first difference
795
/beginning of line | /old last same /old EOL
796
v v v v
797
old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as
798
new: eddie> Oh, my little buggy says to me, as lurgid as
799
^ ^ ^ ^
800
\beginning of line | \new last same \new end of line
801
\new first difference
802
803
All are character pointers for the sake of speed. Special cases for
804
no differences, as well as for end of line additions must be handled.
805
806
Could be made even smarter, but this works well enough */
807
static void
808
update_line (old, new, current_line, omax, nmax, inv_botlin)
809
register char *old, *new;
810
int current_line, omax, nmax, inv_botlin;
811
{
812
register char *ofd, *ols, *oe, *nfd, *nls, *ne;
813
int temp, lendiff, wsatend, od, nd;
814
int current_invis_chars;
815
816
/* If we're at the right edge of a terminal that supports xn, we're
817
ready to wrap around, so do so. This fixes problems with knowing
818
the exact cursor position and cut-and-paste with certain terminal
819
emulators. In this calculation, TEMP is the physical screen
820
position of the cursor. */
821
temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset);
822
if (temp == screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode
823
&& _rl_last_v_pos == current_line - 1)
824
{
825
if (new[0])
826
putc (new[0], rl_outstream);
827
else
828
putc (' ', rl_outstream);
829
_rl_last_c_pos = 1; /* XXX */
830
_rl_last_v_pos++;
831
if (old[0] && new[0])
832
old[0] = new[0];
833
}
834
835
/* Find first difference. */
836
for (ofd = old, nfd = new;
837
(ofd - old < omax) && *ofd && (*ofd == *nfd);
838
ofd++, nfd++)
839
;
840
841
/* Move to the end of the screen line. ND and OD are used to keep track
842
of the distance between ne and new and oe and old, respectively, to
843
move a subtraction out of each loop. */
844
for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++);
845
for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++);
846
847
/* If no difference, continue to next line. */
848
if (ofd == oe && nfd == ne)
849
return;
850
851
wsatend = 1; /* flag for trailing whitespace */
852
ols = oe - 1; /* find last same */
853
nls = ne - 1;
854
while ((ols > ofd) && (nls > nfd) && (*ols == *nls))
855
{
856
if (*ols != ' ')
857
wsatend = 0;
858
ols--;
859
nls--;
860
}
861
862
if (wsatend)
863
{
864
ols = oe;
865
nls = ne;
866
}
867
else if (*ols != *nls)
868
{
869
if (*ols) /* don't step past the NUL */
870
ols++;
871
if (*nls)
872
nls++;
873
}
874
875
/* count of invisible characters in the current invisible line. */
876
current_invis_chars = W_OFFSET (current_line, wrap_offset);
877
if (_rl_last_v_pos != current_line)
878
{
879
_rl_move_vert (current_line);
880
if (current_line == 0 && visible_wrap_offset)
881
_rl_last_c_pos += visible_wrap_offset;
882
}
883
884
/* If this is the first line and there are invisible characters in the
885
prompt string, and the prompt string has not changed, and the current
886
cursor position is before the last invisible character in the prompt,
887
and the index of the character to move to is past the end of the prompt
888
string, then redraw the entire prompt string. We can only do this
889
reliably if the terminal supports a `cr' capability.
890
891
This is not an efficiency hack -- there is a problem with redrawing
892
portions of the prompt string if they contain terminal escape
893
sequences (like drawing the `unbold' sequence without a corresponding
894
`bold') that manifests itself on certain terminals. */
895
896
lendiff = local_prompt ? strlen (local_prompt) : 0;
897
od = ofd - old; /* index of first difference in visible line */
898
if (current_line == 0 && !_rl_horizontal_scroll_mode &&
899
term_cr && lendiff > visible_length && _rl_last_c_pos > 0 &&
900
od > lendiff && _rl_last_c_pos < last_invisible)
901
{
902
tputs (term_cr, 1, _rl_output_character_function);
903
_rl_output_some_chars (local_prompt, lendiff);
904
_rl_last_c_pos = lendiff;
905
}
906
907
_rl_move_cursor_relative (od, old);
908
909
/* if (len (new) > len (old)) */
910
lendiff = (nls - nfd) - (ols - ofd);
911
912
/* If we are changing the number of invisible characters in a line, and
913
the spot of first difference is before the end of the invisible chars,
914
lendiff needs to be adjusted. */
915
if (current_line == 0 && !_rl_horizontal_scroll_mode &&
916
current_invis_chars != visible_wrap_offset)
917
lendiff += visible_wrap_offset - current_invis_chars;
918
919
/* Insert (diff (len (old), len (new)) ch. */
920
temp = ne - nfd;
921
if (lendiff > 0)
922
{
923
/* Non-zero if we're increasing the number of lines. */
924
int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin;
925
/* Sometimes it is cheaper to print the characters rather than
926
use the terminal's capabilities. If we're growing the number
927
of lines, make sure we actually cause the new line to wrap
928
around on auto-wrapping terminals. */
929
if (terminal_can_insert && ((2 * temp) >= lendiff || term_IC) && (!_rl_term_autowrap || !gl))
930
{
931
/* If lendiff > visible_length and _rl_last_c_pos == 0 and
932
_rl_horizontal_scroll_mode == 1, inserting the characters with
933
term_IC or term_ic will screw up the screen because of the
934
invisible characters. We need to just draw them. */
935
if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 ||
936
lendiff <= visible_length || !current_invis_chars))
937
{
938
insert_some_chars (nfd, lendiff);
939
_rl_last_c_pos += lendiff;
940
}
941
else if (*ols == 0)
942
{
943
/* At the end of a line the characters do not have to
944
be "inserted". They can just be placed on the screen. */
945
/* However, this screws up the rest of this block, which
946
assumes you've done the insert because you can. */
947
_rl_output_some_chars (nfd, lendiff);
948
_rl_last_c_pos += lendiff;
949
}
950
else
951
{
952
/* We have horizontal scrolling and we are not inserting at
953
the end. We have invisible characters in this line. This
954
is a dumb update. */
955
_rl_output_some_chars (nfd, temp);
956
_rl_last_c_pos += temp;
957
return;
958
}
959
/* Copy (new) chars to screen from first diff to last match. */
960
temp = nls - nfd;
961
if ((temp - lendiff) > 0)
962
{
963
_rl_output_some_chars (nfd + lendiff, temp - lendiff);
964
_rl_last_c_pos += temp - lendiff;
965
}
966
}
967
else
968
{
969
/* cannot insert chars, write to EOL */
970
_rl_output_some_chars (nfd, temp);
971
_rl_last_c_pos += temp;
972
}
973
}
974
else /* Delete characters from line. */
975
{
976
/* If possible and inexpensive to use terminal deletion, then do so. */
977
if (term_dc && (2 * temp) >= -lendiff)
978
{
979
/* If all we're doing is erasing the invisible characters in the
980
prompt string, don't bother. It screws up the assumptions
981
about what's on the screen. */
982
if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 &&
983
-lendiff == visible_wrap_offset)
984
lendiff = 0;
985
986
if (lendiff)
987
delete_chars (-lendiff); /* delete (diff) characters */
988
989
/* Copy (new) chars to screen from first diff to last match */
990
temp = nls - nfd;
991
if (temp > 0)
992
{
993
_rl_output_some_chars (nfd, temp);
994
_rl_last_c_pos += temp;
995
}
996
}
997
/* Otherwise, print over the existing material. */
998
else
999
{
1000
if (temp > 0)
1001
{
1002
_rl_output_some_chars (nfd, temp);
1003
_rl_last_c_pos += temp;
1004
}
1005
lendiff = (oe - old) - (ne - new);
1006
if (lendiff)
1007
{
1008
if (_rl_term_autowrap && current_line < inv_botlin)
1009
space_to_eol (lendiff);
1010
else
1011
_rl_clear_to_eol (lendiff);
1012
}
1013
}
1014
}
1015
}
1016
1017
/* Tell the update routines that we have moved onto a new (empty) line. */
1018
int
1019
rl_on_new_line ()
1020
{
1021
if (visible_line)
1022
visible_line[0] = '\0';
1023
1024
_rl_last_c_pos = _rl_last_v_pos = 0;
1025
_rl_vis_botlin = last_lmargin = 0;
1026
if (vis_lbreaks)
1027
vis_lbreaks[0] = vis_lbreaks[1] = 0;
1028
visible_wrap_offset = 0;
1029
return 0;
1030
}
1031
1032
/* Actually update the display, period. */
1033
int
1034
rl_forced_update_display ()
1035
{
1036
if (visible_line)
1037
{
1038
register char *temp = visible_line;
1039
1040
while (*temp)
1041
*temp++ = '\0';
1042
}
1043
rl_on_new_line ();
1044
forced_display++;
1045
(*rl_redisplay_function) ();
1046
return 0;
1047
}
1048
1049
/* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices.
1050
DATA is the contents of the screen line of interest; i.e., where
1051
the movement is being done. */
1052
void
1053
_rl_move_cursor_relative (new, data)
1054
int new;
1055
char *data;
1056
{
1057
register int i;
1058
1059
/* If we don't have to do anything, then return. */
1060
if (_rl_last_c_pos == new) return;
1061
1062
/* It may be faster to output a CR, and then move forwards instead
1063
of moving backwards. */
1064
/* i == current physical cursor position. */
1065
i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset);
1066
if (new == 0 || CR_FASTER (new, _rl_last_c_pos) ||
1067
(_rl_term_autowrap && i == screenwidth))
1068
{
1069
#if defined (__MSDOS__)
1070
putc ('\r', rl_outstream);
1071
#else
1072
tputs (term_cr, 1, _rl_output_character_function);
1073
#endif /* !__MSDOS__ */
1074
_rl_last_c_pos = 0;
1075
}
1076
1077
if (_rl_last_c_pos < new)
1078
{
1079
/* Move the cursor forward. We do it by printing the command
1080
to move the cursor forward if there is one, else print that
1081
portion of the output buffer again. Which is cheaper? */
1082
1083
/* The above comment is left here for posterity. It is faster
1084
to print one character (non-control) than to print a control
1085
sequence telling the terminal to move forward one character.
1086
That kind of control is for people who don't know what the
1087
data is underneath the cursor. */
1088
#if defined (HACK_TERMCAP_MOTION)
1089
extern char *term_forward_char;
1090
1091
if (term_forward_char)
1092
for (i = _rl_last_c_pos; i < new; i++)
1093
tputs (term_forward_char, 1, _rl_output_character_function);
1094
else
1095
for (i = _rl_last_c_pos; i < new; i++)
1096
putc (data[i], rl_outstream);
1097
#else
1098
for (i = _rl_last_c_pos; i < new; i++)
1099
putc (data[i], rl_outstream);
1100
#endif /* HACK_TERMCAP_MOTION */
1101
}
1102
else if (_rl_last_c_pos > new)
1103
_rl_backspace (_rl_last_c_pos - new);
1104
_rl_last_c_pos = new;
1105
}
1106
1107
/* PWP: move the cursor up or down. */
1108
void
1109
_rl_move_vert (to)
1110
int to;
1111
{
1112
register int delta, i;
1113
1114
if (_rl_last_v_pos == to || to > screenheight)
1115
return;
1116
1117
#if defined (__GO32__)
1118
{
1119
int row, col;
1120
1121
ScreenGetCursor (&row, &col);
1122
ScreenSetCursor ((row + to - _rl_last_v_pos), col);
1123
}
1124
#else /* !__GO32__ */
1125
1126
if ((delta = to - _rl_last_v_pos) > 0)
1127
{
1128
for (i = 0; i < delta; i++)
1129
putc ('\n', rl_outstream);
1130
tputs (term_cr, 1, _rl_output_character_function);
1131
_rl_last_c_pos = 0;
1132
}
1133
else
1134
{ /* delta < 0 */
1135
if (term_up && *term_up)
1136
for (i = 0; i < -delta; i++)
1137
tputs (term_up, 1, _rl_output_character_function);
1138
}
1139
#endif /* !__GO32__ */
1140
_rl_last_v_pos = to; /* Now TO is here */
1141
}
1142
1143
/* Physically print C on rl_outstream. This is for functions which know
1144
how to optimize the display. Return the number of characters output. */
1145
int
1146
rl_show_char (c)
1147
int c;
1148
{
1149
int n = 1;
1150
if (META_CHAR (c) && (_rl_output_meta_chars == 0))
1151
{
1152
fprintf (rl_outstream, "M-");
1153
n += 2;
1154
c = UNMETA (c);
1155
}
1156
1157
#if defined (DISPLAY_TABS)
1158
if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT)
1159
#else
1160
if (CTRL_CHAR (c) || c == RUBOUT)
1161
#endif /* !DISPLAY_TABS */
1162
{
1163
fprintf (rl_outstream, "C-");
1164
n += 2;
1165
c = CTRL_CHAR (c) ? UNCTRL (c) : '?';
1166
}
1167
1168
putc (c, rl_outstream);
1169
fflush (rl_outstream);
1170
return n;
1171
}
1172
1173
int
1174
rl_character_len (c, pos)
1175
register int c, pos;
1176
{
1177
unsigned char uc;
1178
1179
uc = (unsigned char)c;
1180
1181
if (META_CHAR (uc))
1182
return ((_rl_output_meta_chars == 0) ? 4 : 1);
1183
1184
if (uc == '\t')
1185
{
1186
#if defined (DISPLAY_TABS)
1187
return (((pos | 7) + 1) - pos);
1188
#else
1189
return (2);
1190
#endif /* !DISPLAY_TABS */
1191
}
1192
1193
if (CTRL_CHAR (c) || c == RUBOUT)
1194
return (2);
1195
1196
return ((isprint (uc)) ? 1 : 2);
1197
}
1198
1199
/* How to print things in the "echo-area". The prompt is treated as a
1200
mini-modeline. */
1201
1202
#if defined (USE_VARARGS)
1203
int
1204
#if defined (PREFER_STDARG)
1205
rl_message (const char *format, ...)
1206
#else
1207
rl_message (va_alist)
1208
va_dcl
1209
#endif
1210
{
1211
va_list args;
1212
#if defined (PREFER_VARARGS)
1213
char *format;
1214
#endif
1215
1216
#if defined (PREFER_STDARG)
1217
va_start (args, format);
1218
#else
1219
va_start (args);
1220
format = va_arg (args, char *);
1221
#endif
1222
1223
vsprintf (msg_buf, format, args);
1224
va_end (args);
1225
1226
rl_display_prompt = msg_buf;
1227
(*rl_redisplay_function) ();
1228
return 0;
1229
}
1230
#else /* !USE_VARARGS */
1231
int
1232
rl_message (format, arg1, arg2)
1233
char *format;
1234
{
1235
sprintf (msg_buf, format, arg1, arg2);
1236
rl_display_prompt = msg_buf;
1237
(*rl_redisplay_function) ();
1238
return 0;
1239
}
1240
#endif /* !USE_VARARGS */
1241
1242
/* How to clear things from the "echo-area". */
1243
int
1244
rl_clear_message ()
1245
{
1246
rl_display_prompt = rl_prompt;
1247
(*rl_redisplay_function) ();
1248
return 0;
1249
}
1250
1251
int
1252
rl_reset_line_state ()
1253
{
1254
rl_on_new_line ();
1255
1256
rl_display_prompt = rl_prompt ? rl_prompt : "";
1257
forced_display = 1;
1258
return 0;
1259
}
1260
1261
static char *saved_local_prompt;
1262
static char *saved_local_prefix;
1263
static int saved_last_invisible;
1264
static int saved_visible_length;
1265
1266
void
1267
rl_save_prompt ()
1268
{
1269
saved_local_prompt = local_prompt;
1270
saved_local_prefix = local_prompt_prefix;
1271
saved_last_invisible = last_invisible;
1272
saved_visible_length = visible_length;
1273
1274
local_prompt = local_prompt_prefix = (char *)0;
1275
last_invisible = visible_length = 0;
1276
}
1277
1278
void
1279
rl_restore_prompt ()
1280
{
1281
if (local_prompt)
1282
free (local_prompt);
1283
if (local_prompt_prefix)
1284
free (local_prompt_prefix);
1285
1286
local_prompt = saved_local_prompt;
1287
local_prompt_prefix = saved_local_prefix;
1288
last_invisible = saved_last_invisible;
1289
visible_length = saved_visible_length;
1290
}
1291
1292
char *
1293
_rl_make_prompt_for_search (pchar)
1294
int pchar;
1295
{
1296
int len;
1297
char *pmt;
1298
1299
rl_save_prompt ();
1300
1301
if (saved_local_prompt == 0)
1302
{
1303
len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0;
1304
pmt = xmalloc (len + 2);
1305
if (len)
1306
strcpy (pmt, rl_prompt);
1307
pmt[len] = pchar;
1308
pmt[len+1] = '\0';
1309
}
1310
else
1311
{
1312
len = *saved_local_prompt ? strlen (saved_local_prompt) : 0;
1313
pmt = xmalloc (len + 2);
1314
if (len)
1315
strcpy (pmt, saved_local_prompt);
1316
pmt[len] = pchar;
1317
pmt[len+1] = '\0';
1318
local_prompt = savestring (pmt);
1319
last_invisible = saved_last_invisible;
1320
visible_length = saved_visible_length + 1;
1321
}
1322
return pmt;
1323
}
1324
1325
/* Quick redisplay hack when erasing characters at the end of the line. */
1326
void
1327
_rl_erase_at_end_of_line (l)
1328
int l;
1329
{
1330
register int i;
1331
1332
_rl_backspace (l);
1333
for (i = 0; i < l; i++)
1334
putc (' ', rl_outstream);
1335
_rl_backspace (l);
1336
for (i = 0; i < l; i++)
1337
visible_line[--_rl_last_c_pos] = '\0';
1338
rl_display_fixed++;
1339
}
1340
1341
/* Clear to the end of the line. COUNT is the minimum
1342
number of character spaces to clear, */
1343
void
1344
_rl_clear_to_eol (count)
1345
int count;
1346
{
1347
#if !defined (__GO32__)
1348
if (term_clreol)
1349
tputs (term_clreol, 1, _rl_output_character_function);
1350
else if (count)
1351
#endif /* !__GO32__ */
1352
space_to_eol (count);
1353
}
1354
1355
/* Clear to the end of the line using spaces. COUNT is the minimum
1356
number of character spaces to clear, */
1357
static void
1358
space_to_eol (count)
1359
int count;
1360
{
1361
register int i;
1362
1363
for (i = 0; i < count; i++)
1364
putc (' ', rl_outstream);
1365
1366
_rl_last_c_pos += count;
1367
}
1368
1369
void
1370
_rl_clear_screen ()
1371
{
1372
#if !defined (__GO32__)
1373
if (term_clrpag)
1374
tputs (term_clrpag, 1, _rl_output_character_function);
1375
else
1376
#endif /* !__GO32__ */
1377
crlf ();
1378
}
1379
1380
/* Insert COUNT characters from STRING to the output stream. */
1381
static void
1382
insert_some_chars (string, count)
1383
char *string;
1384
int count;
1385
{
1386
#if defined (__GO32__)
1387
int row, col, width;
1388
char *row_start;
1389
1390
ScreenGetCursor (&row, &col);
1391
width = ScreenCols ();
1392
row_start = ScreenPrimary + (row * width);
1393
1394
memcpy (row_start + col + count, row_start + col, width - col - count);
1395
1396
/* Place the text on the screen. */
1397
_rl_output_some_chars (string, count);
1398
#else /* !_GO32 */
1399
1400
/* If IC is defined, then we do not have to "enter" insert mode. */
1401
if (term_IC)
1402
{
1403
char *buffer;
1404
buffer = tgoto (term_IC, 0, count);
1405
tputs (buffer, 1, _rl_output_character_function);
1406
_rl_output_some_chars (string, count);
1407
}
1408
else
1409
{
1410
register int i;
1411
1412
/* If we have to turn on insert-mode, then do so. */
1413
if (term_im && *term_im)
1414
tputs (term_im, 1, _rl_output_character_function);
1415
1416
/* If there is a special command for inserting characters, then
1417
use that first to open up the space. */
1418
if (term_ic && *term_ic)
1419
{
1420
for (i = count; i--; )
1421
tputs (term_ic, 1, _rl_output_character_function);
1422
}
1423
1424
/* Print the text. */
1425
_rl_output_some_chars (string, count);
1426
1427
/* If there is a string to turn off insert mode, we had best use
1428
it now. */
1429
if (term_ei && *term_ei)
1430
tputs (term_ei, 1, _rl_output_character_function);
1431
}
1432
#endif /* !__GO32__ */
1433
}
1434
1435
/* Delete COUNT characters from the display line. */
1436
static void
1437
delete_chars (count)
1438
int count;
1439
{
1440
#if defined (__GO32__)
1441
int row, col, width;
1442
char *row_start;
1443
1444
ScreenGetCursor (&row, &col);
1445
width = ScreenCols ();
1446
row_start = ScreenPrimary + (row * width);
1447
1448
memcpy (row_start + col, row_start + col + count, width - col - count);
1449
memset (row_start + width - count, 0, count * 2);
1450
#else /* !_GO32 */
1451
1452
if (count > screenwidth) /* XXX */
1453
return;
1454
1455
if (term_DC && *term_DC)
1456
{
1457
char *buffer;
1458
buffer = tgoto (term_DC, count, count);
1459
tputs (buffer, count, _rl_output_character_function);
1460
}
1461
else
1462
{
1463
if (term_dc && *term_dc)
1464
while (count--)
1465
tputs (term_dc, 1, _rl_output_character_function);
1466
}
1467
#endif /* !__GO32__ */
1468
}
1469
1470
void
1471
_rl_update_final ()
1472
{
1473
int full_lines;
1474
1475
full_lines = 0;
1476
/* If the cursor is the only thing on an otherwise-blank last line,
1477
compensate so we don't print an extra CRLF. */
1478
if (_rl_vis_botlin && _rl_last_c_pos == 0 &&
1479
visible_line[vis_lbreaks[_rl_vis_botlin]] == 0)
1480
{
1481
_rl_vis_botlin--;
1482
full_lines = 1;
1483
}
1484
_rl_move_vert (_rl_vis_botlin);
1485
/* If we've wrapped lines, remove the final xterm line-wrap flag. */
1486
if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == screenwidth))
1487
{
1488
char *last_line;
1489
last_line = &visible_line[inv_lbreaks[_rl_vis_botlin]];
1490
_rl_move_cursor_relative (screenwidth - 1, last_line);
1491
_rl_clear_to_eol (0);
1492
putc (last_line[screenwidth - 1], rl_outstream);
1493
}
1494
_rl_vis_botlin = 0;
1495
crlf ();
1496
fflush (rl_outstream);
1497
rl_display_fixed++;
1498
}
1499
1500
/* Move to the start of the current line. */
1501
static void
1502
cr ()
1503
{
1504
if (term_cr)
1505
{
1506
tputs (term_cr, 1, _rl_output_character_function);
1507
_rl_last_c_pos = 0;
1508
}
1509
}
1510
1511
/* Redisplay the current line after a SIGWINCH is received. */
1512
void
1513
_rl_redisplay_after_sigwinch ()
1514
{
1515
char *t, *oldp, *oldl, *oldlprefix;
1516
1517
/* Clear the current line and put the cursor at column 0. Make sure
1518
the right thing happens if we have wrapped to a new screen line. */
1519
if (term_cr)
1520
{
1521
tputs (term_cr, 1, _rl_output_character_function);
1522
_rl_last_c_pos = 0;
1523
if (term_clreol)
1524
tputs (term_clreol, 1, _rl_output_character_function);
1525
else
1526
{
1527
space_to_eol (screenwidth);
1528
tputs (term_cr, 1, _rl_output_character_function);
1529
}
1530
if (_rl_last_v_pos > 0)
1531
_rl_move_vert (0);
1532
}
1533
else
1534
crlf ();
1535
1536
/* Redraw only the last line of a multi-line prompt. */
1537
t = strrchr (rl_display_prompt, '\n');
1538
if (t)
1539
{
1540
oldp = rl_display_prompt;
1541
oldl = local_prompt;
1542
oldlprefix = local_prompt_prefix;
1543
rl_display_prompt = ++t;
1544
local_prompt = local_prompt_prefix = (char *)NULL;
1545
rl_forced_update_display ();
1546
rl_display_prompt = oldp;
1547
local_prompt = oldl;
1548
local_prompt_prefix = oldlprefix;
1549
}
1550
else
1551
rl_forced_update_display ();
1552
}
1553
1554
void
1555
_rl_clean_up_for_exit ()
1556
{
1557
if (readline_echoing_p)
1558
{
1559
_rl_move_vert (_rl_vis_botlin);
1560
_rl_vis_botlin = 0;
1561
fflush (rl_outstream);
1562
rl_restart_output (1, 0);
1563
}
1564
}
1565
1566
void
1567
_rl_erase_entire_line ()
1568
{
1569
cr ();
1570
_rl_clear_to_eol (0);
1571
cr ();
1572
fflush (rl_outstream);
1573
}
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