File: | src/gnu/lib/libreadline/display.c |
Warning: | line 410, column 9 Although the value stored to 'inv_botlin' is used in the enclosing expression, the value is never actually read from 'inv_botlin' |
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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 2, 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 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
22 | #define READLINE_LIBRARY |
23 | |
24 | #if defined (HAVE_CONFIG_H1) |
25 | # include <config.h> |
26 | #endif |
27 | |
28 | #include <sys/types.h> |
29 | |
30 | #if defined (HAVE_UNISTD_H1) |
31 | # include <unistd.h> |
32 | #endif /* HAVE_UNISTD_H */ |
33 | |
34 | #include "posixstat.h" |
35 | |
36 | #if defined (HAVE_STDLIB_H1) |
37 | # include <stdlib.h> |
38 | #else |
39 | # include "ansi_stdlib.h" |
40 | #endif /* HAVE_STDLIB_H */ |
41 | |
42 | #include <stdio.h> |
43 | |
44 | /* System-specific feature definitions and include files. */ |
45 | #include "rldefs.h" |
46 | #include "rlmbutil.h" |
47 | |
48 | /* Termcap library stuff. */ |
49 | #include "tcap.h" |
50 | |
51 | /* Some standard library routines. */ |
52 | #include "readline.h" |
53 | #include "history.h" |
54 | |
55 | #include "rlprivate.h" |
56 | #include "xmalloc.h" |
57 | |
58 | #if !defined (strchr) && !defined (__STDC__1) |
59 | extern char *strchr (), *strrchr (); |
60 | #endif /* !strchr && !__STDC__ */ |
61 | |
62 | #if defined (HACK_TERMCAP_MOTION) |
63 | extern char *_rl_term_forward_char; |
64 | #endif |
65 | |
66 | static void update_line PARAMS((char *, char *, int, int, int, int))(char *, char *, int, int, int, int); |
67 | static void space_to_eol PARAMS((int))(int); |
68 | static void delete_chars PARAMS((int))(int); |
69 | static void insert_some_chars PARAMS((char *, int, int))(char *, int, int); |
70 | static void cr PARAMS((void))(void); |
71 | |
72 | #if defined (HANDLE_MULTIBYTE) |
73 | static int _rl_col_width PARAMS((const char *, int, int))(const char *, int, int); |
74 | static int *_rl_wrapped_line; |
75 | #else |
76 | # define _rl_col_width(l, s, e)(((e) <= (s)) ? 0 : (e) - (s)) (((e) <= (s)) ? 0 : (e) - (s)) |
77 | #endif |
78 | |
79 | static int *inv_lbreaks, *vis_lbreaks; |
80 | static int inv_lbsize, vis_lbsize; |
81 | |
82 | /* Heuristic used to decide whether it is faster to move from CUR to NEW |
83 | by backing up or outputting a carriage return and moving forward. */ |
84 | #define CR_FASTER(new, cur)(((new) + 1) < ((cur) - (new))) (((new) + 1) < ((cur) - (new))) |
85 | |
86 | /* **************************************************************** */ |
87 | /* */ |
88 | /* Display stuff */ |
89 | /* */ |
90 | /* **************************************************************** */ |
91 | |
92 | /* This is the stuff that is hard for me. I never seem to write good |
93 | display routines in C. Let's see how I do this time. */ |
94 | |
95 | /* (PWP) Well... Good for a simple line updater, but totally ignores |
96 | the problems of input lines longer than the screen width. |
97 | |
98 | update_line and the code that calls it makes a multiple line, |
99 | automatically wrapping line update. Careful attention needs |
100 | to be paid to the vertical position variables. */ |
101 | |
102 | /* Keep two buffers; one which reflects the current contents of the |
103 | screen, and the other to draw what we think the new contents should |
104 | be. Then compare the buffers, and make whatever changes to the |
105 | screen itself that we should. Finally, make the buffer that we |
106 | just drew into be the one which reflects the current contents of the |
107 | screen, and place the cursor where it belongs. |
108 | |
109 | Commands that want to can fix the display themselves, and then let |
110 | this function know that the display has been fixed by setting the |
111 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ |
112 | |
113 | /* Application-specific redisplay function. */ |
114 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
115 | |
116 | /* Global variables declared here. */ |
117 | /* What YOU turn on when you have handled all redisplay yourself. */ |
118 | int rl_display_fixed = 0; |
119 | |
120 | int _rl_suppress_redisplay = 0; |
121 | |
122 | /* The stuff that gets printed out before the actual text of the line. |
123 | This is usually pointing to rl_prompt. */ |
124 | char *rl_display_prompt = (char *)NULL((void *)0); |
125 | |
126 | /* Pseudo-global variables declared here. */ |
127 | /* The visible cursor position. If you print some text, adjust this. */ |
128 | int _rl_last_c_pos = 0; |
129 | int _rl_last_v_pos = 0; |
130 | |
131 | /* Number of lines currently on screen minus 1. */ |
132 | int _rl_vis_botlin = 0; |
133 | |
134 | /* Variables used only in this file. */ |
135 | /* The last left edge of text that was displayed. This is used when |
136 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ |
137 | static int last_lmargin; |
138 | |
139 | /* The line display buffers. One is the line currently displayed on |
140 | the screen. The other is the line about to be displayed. */ |
141 | static char *visible_line = (char *)NULL((void *)0); |
142 | static char *invisible_line = (char *)NULL((void *)0); |
143 | |
144 | /* A buffer for `modeline' messages. */ |
145 | static char msg_buf[128]; |
146 | |
147 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ |
148 | static int forced_display; |
149 | |
150 | /* Default and initial buffer size. Can grow. */ |
151 | static int line_size = 1024; |
152 | |
153 | /* Variables to keep track of the expanded prompt string, which may |
154 | include invisible characters. */ |
155 | |
156 | static char *local_prompt, *local_prompt_prefix; |
157 | static int prompt_visible_length, prompt_prefix_length; |
158 | |
159 | /* The number of invisible characters in the line currently being |
160 | displayed on the screen. */ |
161 | static int visible_wrap_offset; |
162 | |
163 | /* The number of invisible characters in the prompt string. Static so it |
164 | can be shared between rl_redisplay and update_line */ |
165 | static int wrap_offset; |
166 | |
167 | /* The index of the last invisible character in the prompt string. */ |
168 | static int prompt_last_invisible; |
169 | |
170 | /* The length (buffer offset) of the first line of the last (possibly |
171 | multi-line) buffer displayed on the screen. */ |
172 | static int visible_first_line_len; |
173 | |
174 | /* Number of invisible characters on the first physical line of the prompt. |
175 | Only valid when the number of physical characters in the prompt exceeds |
176 | (or is equal to) _rl_screenwidth. */ |
177 | static int prompt_invis_chars_first_line; |
178 | |
179 | static int prompt_last_screen_line; |
180 | |
181 | /* Expand the prompt string S and return the number of visible |
182 | characters in *LP, if LP is not null. This is currently more-or-less |
183 | a placeholder for expansion. LIP, if non-null is a place to store the |
184 | index of the last invisible character in the returned string. NIFLP, |
185 | if non-zero, is a place to store the number of invisible characters in |
186 | the first prompt line. */ |
187 | |
188 | /* Current implementation: |
189 | \001 (^A) start non-visible characters |
190 | \002 (^B) end non-visible characters |
191 | all characters except \001 and \002 (following a \001) are copied to |
192 | the returned string; all characters except those between \001 and |
193 | \002 are assumed to be `visible'. */ |
194 | |
195 | static char * |
196 | expand_prompt (pmt, lp, lip, niflp) |
197 | char *pmt; |
198 | int *lp, *lip, *niflp; |
199 | { |
200 | char *r, *ret, *p; |
201 | int l, rl, last, ignoring, ninvis, invfl; |
202 | |
203 | /* Short-circuit if we can. */ |
204 | if (strchr (pmt, RL_PROMPT_START_IGNORE'\001') == 0) |
205 | { |
206 | r = savestring (pmt)xstrdup(pmt); |
207 | if (lp) |
208 | *lp = strlen (r); |
209 | return r; |
210 | } |
211 | |
212 | l = strlen (pmt); |
213 | r = ret = (char *)xmalloc (l + 1); |
214 | |
215 | invfl = 0; /* invisible chars in first line of prompt */ |
216 | |
217 | for (rl = ignoring = last = ninvis = 0, p = pmt; p && *p; p++) |
218 | { |
219 | /* This code strips the invisible character string markers |
220 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ |
221 | if (*p == RL_PROMPT_START_IGNORE'\001') |
222 | { |
223 | ignoring++; |
224 | continue; |
225 | } |
226 | else if (ignoring && *p == RL_PROMPT_END_IGNORE'\002') |
227 | { |
228 | ignoring = 0; |
229 | last = r - ret - 1; |
230 | continue; |
231 | } |
232 | else |
233 | { |
234 | *r++ = *p; |
235 | if (!ignoring) |
236 | rl++; |
237 | else |
238 | ninvis++; |
239 | if (rl == _rl_screenwidth) |
240 | invfl = ninvis; |
241 | } |
242 | } |
243 | |
244 | if (rl < _rl_screenwidth) |
245 | invfl = ninvis; |
246 | |
247 | *r = '\0'; |
248 | if (lp) |
249 | *lp = rl; |
250 | if (lip) |
251 | *lip = last; |
252 | if (niflp) |
253 | *niflp = invfl; |
254 | return ret; |
255 | } |
256 | |
257 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
258 | PMT and return the rest of PMT. */ |
259 | char * |
260 | _rl_strip_prompt (pmt) |
261 | char *pmt; |
262 | { |
263 | char *ret; |
264 | |
265 | ret = expand_prompt (pmt, (int *)NULL((void *)0), (int *)NULL((void *)0), (int *)NULL((void *)0)); |
266 | return ret; |
267 | } |
268 | |
269 | /* |
270 | * Expand the prompt string into the various display components, if |
271 | * necessary. |
272 | * |
273 | * local_prompt = expanded last line of string in rl_display_prompt |
274 | * (portion after the final newline) |
275 | * local_prompt_prefix = portion before last newline of rl_display_prompt, |
276 | * expanded via expand_prompt |
277 | * prompt_visible_length = number of visible characters in local_prompt |
278 | * prompt_prefix_length = number of visible characters in local_prompt_prefix |
279 | * |
280 | * This function is called once per call to readline(). It may also be |
281 | * called arbitrarily to expand the primary prompt. |
282 | * |
283 | * The return value is the number of visible characters on the last line |
284 | * of the (possibly multi-line) prompt. |
285 | */ |
286 | int |
287 | rl_expand_prompt (prompt) |
288 | char *prompt; |
289 | { |
290 | char *p, *t; |
291 | int c; |
292 | |
293 | /* Clear out any saved values. */ |
294 | FREE (local_prompt)if (local_prompt) free (local_prompt); |
295 | FREE (local_prompt_prefix)if (local_prompt_prefix) free (local_prompt_prefix); |
296 | |
297 | local_prompt = local_prompt_prefix = (char *)0; |
298 | prompt_last_invisible = prompt_visible_length = 0; |
299 | |
300 | if (prompt == 0 || *prompt == 0) |
301 | return (0); |
302 | |
303 | p = strrchr (prompt, '\n'); |
304 | if (!p) |
305 | { |
306 | /* The prompt is only one logical line, though it might wrap. */ |
307 | local_prompt = expand_prompt (prompt, &prompt_visible_length, |
308 | &prompt_last_invisible, |
309 | &prompt_invis_chars_first_line); |
310 | local_prompt_prefix = (char *)0; |
311 | return (prompt_visible_length); |
312 | } |
313 | else |
314 | { |
315 | /* The prompt spans multiple lines. */ |
316 | t = ++p; |
317 | local_prompt = expand_prompt (p, &prompt_visible_length, |
318 | &prompt_last_invisible, |
319 | &prompt_invis_chars_first_line); |
320 | c = *t; *t = '\0'; |
321 | /* The portion of the prompt string up to and including the |
322 | final newline is now null-terminated. */ |
323 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
324 | (int *)NULL((void *)0), |
325 | &prompt_invis_chars_first_line); |
326 | *t = c; |
327 | return (prompt_prefix_length); |
328 | } |
329 | } |
330 | |
331 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
332 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE |
333 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is |
334 | increased. If the lines have already been allocated, this ensures that |
335 | they can hold at least MINSIZE characters. */ |
336 | static void |
337 | init_line_structures (minsize) |
338 | int minsize; |
339 | { |
340 | register int n; |
341 | |
342 | if (invisible_line == 0) /* initialize it */ |
343 | { |
344 | if (line_size < minsize) |
345 | line_size = minsize; |
346 | visible_line = (char *)xmalloc (line_size); |
347 | invisible_line = (char *)xmalloc (line_size); |
348 | } |
349 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ |
350 | { |
351 | line_size *= 2; |
352 | if (line_size < minsize) |
353 | line_size = minsize; |
354 | visible_line = (char *)xrealloc (visible_line, line_size); |
355 | invisible_line = (char *)xrealloc (invisible_line, line_size); |
356 | } |
357 | |
358 | for (n = minsize; n < line_size; n++) |
359 | { |
360 | visible_line[n] = 0; |
361 | invisible_line[n] = 1; |
362 | } |
363 | |
364 | if (vis_lbreaks == 0) |
365 | { |
366 | /* should be enough. */ |
367 | inv_lbsize = vis_lbsize = 256; |
368 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); |
369 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); |
370 | #if defined (HANDLE_MULTIBYTE) |
371 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); |
372 | #endif |
373 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
374 | } |
375 | } |
376 | |
377 | /* Basic redisplay algorithm. */ |
378 | void |
379 | rl_redisplay () |
380 | { |
381 | register int in, out, c, linenum, cursor_linenum; |
382 | register char *line; |
383 | int c_pos, inv_botlin, lb_botlin, lb_linenum; |
384 | int newlines, lpos, temp; |
385 | char *prompt_this_line; |
386 | #if defined (HANDLE_MULTIBYTE) |
387 | wchar_t wc; |
388 | size_t wc_bytes; |
389 | int wc_width; |
390 | mbstate_t ps; |
391 | int _rl_wrapped_multicolumn = 0; |
392 | #endif |
393 | |
394 | if (!readline_echoing_p) |
395 | return; |
396 | |
397 | if (!rl_display_prompt) |
398 | rl_display_prompt = ""; |
399 | |
400 | if (invisible_line == 0) |
401 | { |
402 | init_line_structures (0); |
403 | rl_on_new_line (); |
404 | } |
405 | |
406 | /* Draw the line into the buffer. */ |
407 | c_pos = -1; |
408 | |
409 | line = invisible_line; |
410 | out = inv_botlin = 0; |
Although the value stored to 'inv_botlin' is used in the enclosing expression, the value is never actually read from 'inv_botlin' | |
411 | |
412 | /* Mark the line as modified or not. We only do this for history |
413 | lines. */ |
414 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
415 | { |
416 | line[out++] = '*'; |
417 | line[out] = '\0'; |
418 | } |
419 | |
420 | /* If someone thought that the redisplay was handled, but the currently |
421 | visible line has a different modification state than the one about |
422 | to become visible, then correct the caller's misconception. */ |
423 | if (visible_line[0] != invisible_line[0]) |
424 | rl_display_fixed = 0; |
425 | |
426 | /* If the prompt to be displayed is the `primary' readline prompt (the |
427 | one passed to readline()), use the values we have already expanded. |
428 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the |
429 | number of non-visible characters in the prompt string. */ |
430 | if (rl_display_prompt == rl_prompt || local_prompt) |
431 | { |
432 | int local_len = local_prompt ? strlen (local_prompt) : 0; |
433 | if (local_prompt_prefix && forced_display) |
434 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); |
435 | |
436 | if (local_len > 0) |
437 | { |
438 | temp = local_len + out + 2; |
439 | if (temp >= line_size) |
440 | { |
441 | line_size = (temp + 1024) - (temp % 1024); |
442 | visible_line = (char *)xrealloc (visible_line, line_size); |
443 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); |
444 | } |
445 | strncpy (line + out, local_prompt, local_len); |
446 | out += local_len; |
447 | } |
448 | line[out] = '\0'; |
449 | wrap_offset = local_len - prompt_visible_length; |
450 | } |
451 | else |
452 | { |
453 | int pmtlen; |
454 | prompt_this_line = strrchr (rl_display_prompt, '\n'); |
455 | if (!prompt_this_line) |
456 | prompt_this_line = rl_display_prompt; |
457 | else |
458 | { |
459 | prompt_this_line++; |
460 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
461 | if (forced_display) |
462 | { |
463 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
464 | /* Make sure we are at column zero even after a newline, |
465 | regardless of the state of terminal output processing. */ |
466 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
467 | cr (); |
468 | } |
469 | } |
470 | |
471 | pmtlen = strlen (prompt_this_line); |
472 | temp = pmtlen + out + 2; |
473 | if (temp >= line_size) |
474 | { |
475 | line_size = (temp + 1024) - (temp % 1024); |
476 | visible_line = (char *)xrealloc (visible_line, line_size); |
477 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); |
478 | } |
479 | strncpy (line + out, prompt_this_line, pmtlen); |
480 | out += pmtlen; |
481 | line[out] = '\0'; |
482 | wrap_offset = prompt_invis_chars_first_line = 0; |
483 | } |
484 | |
485 | #define CHECK_INV_LBREAKS()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0) \ |
486 | do { \ |
487 | if (newlines >= (inv_lbsize - 2)) \ |
488 | { \ |
489 | inv_lbsize *= 2; \ |
490 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
491 | } \ |
492 | } while (0) |
493 | |
494 | #if defined (HANDLE_MULTIBYTE) |
495 | #define CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0) \ |
496 | do { \ |
497 | lpos++; \ |
498 | if (lpos >= _rl_screenwidth) \ |
499 | { \ |
500 | if (newlines >= (inv_lbsize - 2)) \ |
501 | { \ |
502 | inv_lbsize *= 2; \ |
503 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
504 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
505 | } \ |
506 | inv_lbreaks[++newlines] = out; \ |
507 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
508 | lpos = 0; \ |
509 | } \ |
510 | } while (0) |
511 | #else |
512 | #define CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0) \ |
513 | do { \ |
514 | lpos++; \ |
515 | if (lpos >= _rl_screenwidth) \ |
516 | { \ |
517 | if (newlines >= (inv_lbsize - 2)) \ |
518 | { \ |
519 | inv_lbsize *= 2; \ |
520 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
521 | } \ |
522 | inv_lbreaks[++newlines] = out; \ |
523 | lpos = 0; \ |
524 | } \ |
525 | } while (0) |
526 | #endif |
527 | |
528 | /* inv_lbreaks[i] is where line i starts in the buffer. */ |
529 | inv_lbreaks[newlines = 0] = 0; |
530 | lpos = out - wrap_offset; |
531 | #if defined (HANDLE_MULTIBYTE) |
532 | memset (_rl_wrapped_line, 0, vis_lbsize); |
533 | #endif |
534 | |
535 | /* prompt_invis_chars_first_line is the number of invisible characters in |
536 | the first physical line of the prompt. |
537 | wrap_offset - prompt_invis_chars_first_line is the number of invis |
538 | chars on the second line. */ |
539 | |
540 | /* what if lpos is already >= _rl_screenwidth before we start drawing the |
541 | contents of the command line? */ |
542 | while (lpos >= _rl_screenwidth) |
543 | { |
544 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
545 | invisible characters that is longer than the screen width. The |
546 | prompt_invis_chars_first_line variable could be made into an array |
547 | saying how many invisible characters there are per line, but that's |
548 | probably too much work for the benefit gained. How many people have |
549 | prompts that exceed two physical lines? */ |
550 | temp = ((newlines + 1) * _rl_screenwidth) + |
551 | #if 0 |
552 | ((newlines == 0) ? prompt_invis_chars_first_line : 0) + |
553 | #else |
554 | ((newlines == 0 && local_prompt_prefix == 0) ? prompt_invis_chars_first_line : 0) + |
555 | #endif |
556 | ((newlines == 1) ? wrap_offset : 0); |
557 | |
558 | inv_lbreaks[++newlines] = temp; |
559 | lpos -= _rl_screenwidth; |
560 | } |
561 | |
562 | prompt_last_screen_line = newlines; |
563 | |
564 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping |
565 | track of where the cursor is (c_pos), the number of the line containing |
566 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
567 | It maintains an array of line breaks for display (inv_lbreaks). |
568 | This handles expanding tabs for display and displaying meta characters. */ |
569 | lb_linenum = 0; |
570 | #if defined (HANDLE_MULTIBYTE) |
571 | in = 0; |
572 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
573 | { |
574 | memset (&ps, 0, sizeof (mbstate_t)); |
575 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); |
576 | } |
577 | else |
578 | wc_bytes = 1; |
579 | while (in < rl_end) |
580 | #else |
581 | for (in = 0; in < rl_end; in++) |
582 | #endif |
583 | { |
584 | c = (unsigned char)rl_line_buffer[in]; |
585 | |
586 | #if defined (HANDLE_MULTIBYTE) |
587 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
588 | { |
589 | if (wc_bytes == (size_t)-1 || wc_bytes == (size_t)-2) |
590 | { |
591 | /* Byte sequence is invalid or shortened. Assume that the |
592 | first byte represents a character. */ |
593 | wc_bytes = 1; |
594 | /* Assume that a character occupies a single column. */ |
595 | wc_width = 1; |
596 | memset (&ps, 0, sizeof (mbstate_t)); |
597 | } |
598 | else if (wc_bytes == (size_t)0) |
599 | break; /* Found '\0' */ |
600 | else |
601 | { |
602 | temp = wcwidth (wc); |
603 | wc_width = (temp < 0) ? 1 : temp; |
604 | } |
605 | } |
606 | #endif |
607 | |
608 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
609 | { |
610 | line_size *= 2; |
611 | visible_line = (char *)xrealloc (visible_line, line_size); |
612 | invisible_line = (char *)xrealloc (invisible_line, line_size); |
613 | line = invisible_line; |
614 | } |
615 | |
616 | if (in == rl_point) |
617 | { |
618 | c_pos = out; |
619 | lb_linenum = newlines; |
620 | } |
621 | |
622 | #if defined (HANDLE_MULTIBYTE) |
623 | if (META_CHAR (c)((c) > 0x07f && (c) <= 255) && _rl_output_meta_chars == 0) /* XXX - clean up */ |
624 | #else |
625 | if (META_CHAR (c)((c) > 0x07f && (c) <= 255)) |
626 | #endif |
627 | { |
628 | if (_rl_output_meta_chars == 0) |
629 | { |
630 | snprintf (line + out, line_size - out, "\\%o", c); |
631 | |
632 | if (lpos + 4 >= _rl_screenwidth) |
633 | { |
634 | temp = _rl_screenwidth - lpos; |
635 | CHECK_INV_LBREAKS ()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0); |
636 | inv_lbreaks[++newlines] = out + temp; |
637 | lpos = 4 - temp; |
638 | } |
639 | else |
640 | lpos += 4; |
641 | |
642 | out += 4; |
643 | } |
644 | else |
645 | { |
646 | line[out++] = c; |
647 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
648 | } |
649 | } |
650 | #if defined (DISPLAY_TABS) |
651 | else if (c == '\t') |
652 | { |
653 | register int newout; |
654 | |
655 | #if 0 |
656 | newout = (out | (int)7) + 1; |
657 | #else |
658 | newout = out + 8 - lpos % 8; |
659 | #endif |
660 | temp = newout - out; |
661 | if (lpos + temp >= _rl_screenwidth) |
662 | { |
663 | register int temp2; |
664 | temp2 = _rl_screenwidth - lpos; |
665 | CHECK_INV_LBREAKS ()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0); |
666 | inv_lbreaks[++newlines] = out + temp2; |
667 | lpos = temp - temp2; |
668 | while (out < newout) |
669 | line[out++] = ' '; |
670 | } |
671 | else |
672 | { |
673 | while (out < newout) |
674 | line[out++] = ' '; |
675 | lpos += temp; |
676 | } |
677 | } |
678 | #endif |
679 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
680 | { |
681 | line[out++] = '\0'; /* XXX - sentinel */ |
682 | CHECK_INV_LBREAKS ()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0); |
683 | inv_lbreaks[++newlines] = out; |
684 | lpos = 0; |
685 | } |
686 | else if (CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) || c == RUBOUT0x7f) |
687 | { |
688 | line[out++] = '^'; |
689 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
690 | line[out++] = CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) ? UNCTRL (c)((((unsigned char)(((c)|0x40)) == (((c)|0x40))) && (isascii (((c)|0x40)) && islower (((c)|0x40)))) ? toupper((unsigned char)((c)|0x40)) : (((c)|0x40))) : '?'; |
691 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
692 | } |
693 | else |
694 | { |
695 | #if defined (HANDLE_MULTIBYTE) |
696 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
697 | { |
698 | register int i; |
699 | |
700 | _rl_wrapped_multicolumn = 0; |
701 | |
702 | if (_rl_screenwidth < lpos + wc_width) |
703 | for (i = lpos; i < _rl_screenwidth; i++) |
704 | { |
705 | /* The space will be removed in update_line() */ |
706 | line[out++] = ' '; |
707 | _rl_wrapped_multicolumn++; |
708 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
709 | } |
710 | if (in == rl_point) |
711 | { |
712 | c_pos = out; |
713 | lb_linenum = newlines; |
714 | } |
715 | for (i = in; i < in+wc_bytes; i++) |
716 | line[out++] = rl_line_buffer[i]; |
717 | for (i = 0; i < wc_width; i++) |
718 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
719 | } |
720 | else |
721 | { |
722 | line[out++] = c; |
723 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
724 | } |
725 | #else |
726 | line[out++] = c; |
727 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
728 | #endif |
729 | } |
730 | |
731 | #if defined (HANDLE_MULTIBYTE) |
732 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
733 | { |
734 | in += wc_bytes; |
735 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); |
736 | } |
737 | else |
738 | in++; |
739 | #endif |
740 | |
741 | } |
742 | line[out] = '\0'; |
743 | if (c_pos < 0) |
744 | { |
745 | c_pos = out; |
746 | lb_linenum = newlines; |
747 | } |
748 | |
749 | inv_botlin = lb_botlin = newlines; |
750 | CHECK_INV_LBREAKS ()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0); |
751 | inv_lbreaks[newlines+1] = out; |
752 | cursor_linenum = lb_linenum; |
753 | |
754 | /* C_POS == position in buffer where cursor should be placed. |
755 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
756 | |
757 | /* PWP: now is when things get a bit hairy. The visible and invisible |
758 | line buffers are really multiple lines, which would wrap every |
759 | (screenwidth - 1) characters. Go through each in turn, finding |
760 | the changed region and updating it. The line order is top to bottom. */ |
761 | |
762 | /* If we can move the cursor up and down, then use multiple lines, |
763 | otherwise, let long lines display in a single terminal line, and |
764 | horizontally scroll it. */ |
765 | |
766 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
767 | { |
768 | int nleft, pos, changed_screen_line; |
769 | |
770 | if (!rl_display_fixed || forced_display) |
771 | { |
772 | forced_display = 0; |
773 | |
774 | /* If we have more than a screenful of material to display, then |
775 | only display a screenful. We should display the last screen, |
776 | not the first. */ |
777 | if (out >= _rl_screenchars) |
778 | { |
779 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
780 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY)(((_rl_screenchars) == 0) ? (_rl_screenchars) : ((_rl_screenchars ) - 1)); |
781 | else |
782 | out = _rl_screenchars - 1; |
783 | } |
784 | |
785 | /* The first line is at character position 0 in the buffer. The |
786 | second and subsequent lines start at inv_lbreaks[N], offset by |
787 | OFFSET (which has already been calculated above). */ |
788 | |
789 | #define W_OFFSET(line, offset)((line) == 0 ? offset : 0) ((line) == 0 ? offset : 0) |
790 | #define VIS_LLEN(l)((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks [l])) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
791 | #define INV_LLEN(l)(inv_lbreaks[l+1] - inv_lbreaks[l]) (inv_lbreaks[l+1] - inv_lbreaks[l]) |
792 | #define VIS_CHARS(line)(visible_line + vis_lbreaks[line]) (visible_line + vis_lbreaks[line]) |
793 | #define VIS_LINE(line)((line) > _rl_vis_botlin) ? "" : (visible_line + vis_lbreaks [line]) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line)(visible_line + vis_lbreaks[line]) |
794 | #define INV_LINE(line)(invisible_line + inv_lbreaks[line]) (invisible_line + inv_lbreaks[line]) |
795 | |
796 | /* For each line in the buffer, do the updating display. */ |
797 | for (linenum = 0; linenum <= inv_botlin; linenum++) |
798 | { |
799 | update_line (VIS_LINE(linenum)((linenum) > _rl_vis_botlin) ? "" : (visible_line + vis_lbreaks [linenum]), INV_LINE(linenum)(invisible_line + inv_lbreaks[linenum]), linenum, |
800 | VIS_LLEN(linenum)((linenum) > _rl_vis_botlin ? 0 : (vis_lbreaks[linenum+1] - vis_lbreaks[linenum])), INV_LLEN(linenum)(inv_lbreaks[linenum+1] - inv_lbreaks[linenum]), inv_botlin); |
801 | |
802 | /* If this is the line with the prompt, we might need to |
803 | compensate for invisible characters in the new line. Do |
804 | this only if there is not more than one new line (which |
805 | implies that we completely overwrite the old visible line) |
806 | and the new line is shorter than the old. Make sure we are |
807 | at the end of the new line before clearing. */ |
808 | if (linenum == 0 && |
809 | inv_botlin == 0 && _rl_last_c_pos == out && |
810 | (wrap_offset > visible_wrap_offset) && |
811 | (_rl_last_c_pos < visible_first_line_len)) |
812 | { |
813 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; |
814 | if (nleft) |
815 | _rl_clear_to_eol (nleft); |
816 | } |
817 | |
818 | /* Since the new first line is now visible, save its length. */ |
819 | if (linenum == 0) |
820 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
821 | } |
822 | |
823 | /* We may have deleted some lines. If so, clear the left over |
824 | blank ones at the bottom out. */ |
825 | if (_rl_vis_botlin > inv_botlin) |
826 | { |
827 | char *tt; |
828 | for (; linenum <= _rl_vis_botlin; linenum++) |
829 | { |
830 | tt = VIS_CHARS (linenum)(visible_line + vis_lbreaks[linenum]); |
831 | _rl_move_vert (linenum); |
832 | _rl_move_cursor_relative (0, tt); |
833 | _rl_clear_to_eol |
834 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
835 | } |
836 | } |
837 | _rl_vis_botlin = inv_botlin; |
838 | |
839 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
840 | different screen line during this redisplay. */ |
841 | changed_screen_line = _rl_last_v_pos != cursor_linenum; |
842 | if (changed_screen_line) |
843 | { |
844 | _rl_move_vert (cursor_linenum); |
845 | /* If we moved up to the line with the prompt using _rl_term_up, |
846 | the physical cursor position on the screen stays the same, |
847 | but the buffer position needs to be adjusted to account |
848 | for invisible characters. */ |
849 | if (cursor_linenum == 0 && wrap_offset) |
850 | _rl_last_c_pos += wrap_offset; |
851 | } |
852 | |
853 | /* We have to reprint the prompt if it contains invisible |
854 | characters, since it's not generally OK to just reprint |
855 | the characters from the current cursor position. But we |
856 | only need to reprint it if the cursor is before the last |
857 | invisible character in the prompt string. */ |
858 | nleft = prompt_visible_length + wrap_offset; |
859 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
860 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
861 | { |
862 | #if defined (__MSDOS__) |
863 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
864 | #else |
865 | if (_rl_term_cr) |
866 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
867 | #endif |
868 | _rl_output_some_chars (local_prompt, nleft); |
869 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
870 | _rl_last_c_pos = _rl_col_width(local_prompt, 0, nleft)(((nleft) <= (0)) ? 0 : (nleft) - (0)); |
871 | else |
872 | _rl_last_c_pos = nleft; |
873 | } |
874 | |
875 | /* Where on that line? And where does that line start |
876 | in the buffer? */ |
877 | pos = inv_lbreaks[cursor_linenum]; |
878 | /* nleft == number of characters in the line buffer between the |
879 | start of the line and the cursor position. */ |
880 | nleft = c_pos - pos; |
881 | |
882 | /* Since _rl_backspace() doesn't know about invisible characters in the |
883 | prompt, and there's no good way to tell it, we compensate for |
884 | those characters here and call _rl_backspace() directly. */ |
885 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
886 | { |
887 | _rl_backspace (_rl_last_c_pos - nleft); |
888 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
889 | _rl_last_c_pos = _rl_col_width (&visible_line[pos], 0, nleft)(((nleft) <= (0)) ? 0 : (nleft) - (0)); |
890 | else |
891 | _rl_last_c_pos = nleft; |
892 | } |
893 | |
894 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
895 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
896 | else if (nleft != _rl_last_c_pos) |
897 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
898 | } |
899 | } |
900 | else /* Do horizontal scrolling. */ |
901 | { |
902 | #define M_OFFSET(margin, offset)((margin) == 0 ? offset : 0) ((margin) == 0 ? offset : 0) |
903 | int lmargin, ndisp, nleft, phys_c_pos, t; |
904 | |
905 | /* Always at top line. */ |
906 | _rl_last_v_pos = 0; |
907 | |
908 | /* Compute where in the buffer the displayed line should start. This |
909 | will be LMARGIN. */ |
910 | |
911 | /* The number of characters that will be displayed before the cursor. */ |
912 | ndisp = c_pos - wrap_offset; |
913 | nleft = prompt_visible_length + wrap_offset; |
914 | /* Where the new cursor position will be on the screen. This can be |
915 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
916 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
917 | t = _rl_screenwidth / 3; |
918 | |
919 | /* If the number of characters had already exceeded the screenwidth, |
920 | last_lmargin will be > 0. */ |
921 | |
922 | /* If the number of characters to be displayed is more than the screen |
923 | width, compute the starting offset so that the cursor is about |
924 | two-thirds of the way across the screen. */ |
925 | if (phys_c_pos > _rl_screenwidth - 2) |
926 | { |
927 | lmargin = c_pos - (2 * t); |
928 | if (lmargin < 0) |
929 | lmargin = 0; |
930 | /* If the left margin would be in the middle of a prompt with |
931 | invisible characters, don't display the prompt at all. */ |
932 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
933 | lmargin = nleft; |
934 | } |
935 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
936 | lmargin = 0; |
937 | else if (phys_c_pos < 1) |
938 | { |
939 | /* If we are moving back towards the beginning of the line and |
940 | the last margin is no longer correct, compute a new one. */ |
941 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ |
942 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
943 | lmargin = nleft; |
944 | } |
945 | else |
946 | lmargin = last_lmargin; |
947 | |
948 | /* If the first character on the screen isn't the first character |
949 | in the display line, indicate this with a special character. */ |
950 | if (lmargin > 0) |
951 | line[lmargin] = '<'; |
952 | |
953 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass |
954 | the whole line, indicate that with a special character at the |
955 | right edge of the screen. If LMARGIN is 0, we need to take the |
956 | wrap offset into account. */ |
957 | t = lmargin + M_OFFSET (lmargin, wrap_offset)((lmargin) == 0 ? wrap_offset : 0) + _rl_screenwidth; |
958 | if (t < out) |
959 | line[t - 1] = '>'; |
960 | |
961 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) |
962 | { |
963 | forced_display = 0; |
964 | update_line (&visible_line[last_lmargin], |
965 | &invisible_line[lmargin], |
966 | 0, |
967 | _rl_screenwidth + visible_wrap_offset, |
968 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), |
969 | 0); |
970 | |
971 | /* If the visible new line is shorter than the old, but the number |
972 | of invisible characters is greater, and we are at the end of |
973 | the new line, we need to clear to eol. */ |
974 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset)((lmargin) == 0 ? wrap_offset : 0); |
975 | if ((M_OFFSET (lmargin, wrap_offset)((lmargin) == 0 ? wrap_offset : 0) > visible_wrap_offset) && |
976 | (_rl_last_c_pos == out) && |
977 | t < visible_first_line_len) |
978 | { |
979 | nleft = _rl_screenwidth - t; |
980 | _rl_clear_to_eol (nleft); |
981 | } |
982 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset)((lmargin) == 0 ? wrap_offset : 0); |
983 | if (visible_first_line_len > _rl_screenwidth) |
984 | visible_first_line_len = _rl_screenwidth; |
985 | |
986 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); |
987 | last_lmargin = lmargin; |
988 | } |
989 | } |
990 | fflush (rl_outstream); |
991 | |
992 | /* Swap visible and non-visible lines. */ |
993 | { |
994 | char *vtemp = visible_line; |
995 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
996 | |
997 | visible_line = invisible_line; |
998 | invisible_line = vtemp; |
999 | |
1000 | vis_lbreaks = inv_lbreaks; |
1001 | inv_lbreaks = itemp; |
1002 | |
1003 | vis_lbsize = inv_lbsize; |
1004 | inv_lbsize = ntemp; |
1005 | |
1006 | rl_display_fixed = 0; |
1007 | /* If we are displaying on a single line, and last_lmargin is > 0, we |
1008 | are not displaying any invisible characters, so set visible_wrap_offset |
1009 | to 0. */ |
1010 | if (_rl_horizontal_scroll_mode && last_lmargin) |
1011 | visible_wrap_offset = 0; |
1012 | else |
1013 | visible_wrap_offset = wrap_offset; |
1014 | } |
1015 | } |
1016 | |
1017 | /* PWP: update_line() is based on finding the middle difference of each |
1018 | line on the screen; vis: |
1019 | |
1020 | /old first difference |
1021 | /beginning of line | /old last same /old EOL |
1022 | v v v v |
1023 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as |
1024 | new: eddie> Oh, my little buggy says to me, as lurgid as |
1025 | ^ ^ ^ ^ |
1026 | \beginning of line | \new last same \new end of line |
1027 | \new first difference |
1028 | |
1029 | All are character pointers for the sake of speed. Special cases for |
1030 | no differences, as well as for end of line additions must be handled. |
1031 | |
1032 | Could be made even smarter, but this works well enough */ |
1033 | static void |
1034 | update_line (old, new, current_line, omax, nmax, inv_botlin) |
1035 | register char *old, *new; |
1036 | int current_line, omax, nmax, inv_botlin; |
1037 | { |
1038 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; |
1039 | int temp, lendiff, wsatend, od, nd; |
1040 | int current_invis_chars; |
1041 | int col_lendiff, col_temp; |
1042 | #if defined (HANDLE_MULTIBYTE) |
1043 | mbstate_t ps_new, ps_old; |
1044 | int new_offset, old_offset, tmp; |
1045 | #endif |
1046 | |
1047 | /* If we're at the right edge of a terminal that supports xn, we're |
1048 | ready to wrap around, so do so. This fixes problems with knowing |
1049 | the exact cursor position and cut-and-paste with certain terminal |
1050 | emulators. In this calculation, TEMP is the physical screen |
1051 | position of the cursor. */ |
1052 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset)((_rl_last_v_pos) == 0 ? visible_wrap_offset : 0); |
1053 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
1054 | && _rl_last_v_pos == current_line - 1) |
1055 | { |
1056 | #if defined (HANDLE_MULTIBYTE) |
1057 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1058 | { |
1059 | wchar_t wc; |
1060 | mbstate_t ps; |
1061 | int tempwidth, bytes; |
1062 | size_t ret; |
1063 | |
1064 | /* This fixes only double-column characters, but if the wrapped |
1065 | character comsumes more than three columns, spaces will be |
1066 | inserted in the string buffer. */ |
1067 | if (_rl_wrapped_line[current_line] > 0) |
1068 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); |
1069 | |
1070 | memset (&ps, 0, sizeof (mbstate_t)); |
1071 | ret = mbrtowc (&wc, new, MB_CUR_MAX1, &ps); |
1072 | if (ret == (size_t)-1 || ret == (size_t)-2) |
1073 | { |
1074 | tempwidth = 1; |
1075 | ret = 1; |
1076 | } |
1077 | else if (ret == 0) |
1078 | tempwidth = 0; |
1079 | else |
1080 | tempwidth = wcwidth (wc); |
1081 | |
1082 | if (tempwidth > 0) |
1083 | { |
1084 | int count; |
1085 | bytes = ret; |
1086 | for (count = 0; count < bytes; count++) |
1087 | putc (new[count], rl_outstream)(!__isthreaded ? __sputc(new[count], rl_outstream) : (putc)(new [count], rl_outstream)); |
1088 | _rl_last_c_pos = tempwidth; |
1089 | _rl_last_v_pos++; |
1090 | memset (&ps, 0, sizeof (mbstate_t)); |
1091 | ret = mbrtowc (&wc, old, MB_CUR_MAX1, &ps); |
1092 | if (ret != 0 && bytes != 0) |
1093 | { |
1094 | if (ret == (size_t)-1 || ret == (size_t)-2) |
1095 | memmove (old+bytes, old+1, strlen (old+1)); |
1096 | else |
1097 | memmove (old+bytes, old+ret, strlen (old+ret)); |
1098 | memcpy (old, new, bytes); |
1099 | } |
1100 | } |
1101 | else |
1102 | { |
1103 | putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream )); |
1104 | _rl_last_c_pos = 1; |
1105 | _rl_last_v_pos++; |
1106 | if (old[0] && new[0]) |
1107 | old[0] = new[0]; |
1108 | } |
1109 | } |
1110 | else |
1111 | #endif |
1112 | { |
1113 | if (new[0]) |
1114 | putc (new[0], rl_outstream)(!__isthreaded ? __sputc(new[0], rl_outstream) : (putc)(new[0 ], rl_outstream)); |
1115 | else |
1116 | putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream )); |
1117 | _rl_last_c_pos = 1; /* XXX */ |
1118 | _rl_last_v_pos++; |
1119 | if (old[0] && new[0]) |
1120 | old[0] = new[0]; |
1121 | } |
1122 | } |
1123 | |
1124 | |
1125 | /* Find first difference. */ |
1126 | #if defined (HANDLE_MULTIBYTE) |
1127 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1128 | { |
1129 | memset (&ps_new, 0, sizeof(mbstate_t)); |
1130 | memset (&ps_old, 0, sizeof(mbstate_t)); |
1131 | |
1132 | new_offset = old_offset = 0; |
1133 | for (ofd = old, nfd = new; |
1134 | (ofd - old < omax) && *ofd && |
1135 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) |
1136 | { |
1137 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY)((old_offset) + (1)); |
1138 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY)((new_offset) + (1)); |
1139 | ofd = old + old_offset; |
1140 | nfd = new + new_offset; |
1141 | } |
1142 | } |
1143 | else |
1144 | #endif |
1145 | for (ofd = old, nfd = new; |
1146 | (ofd - old < omax) && *ofd && (*ofd == *nfd); |
1147 | ofd++, nfd++) |
1148 | ; |
1149 | |
1150 | /* Move to the end of the screen line. ND and OD are used to keep track |
1151 | of the distance between ne and new and oe and old, respectively, to |
1152 | move a subtraction out of each loop. */ |
1153 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); |
1154 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); |
1155 | |
1156 | /* If no difference, continue to next line. */ |
1157 | if (ofd == oe && nfd == ne) |
1158 | return; |
1159 | |
1160 | wsatend = 1; /* flag for trailing whitespace */ |
1161 | |
1162 | #if defined (HANDLE_MULTIBYTE) |
1163 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1164 | { |
1165 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY)(((oe - old) == 0) ? (oe - old) : ((oe - old) - 1)); |
1166 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY)(((ne - new) == 0) ? (ne - new) : ((ne - new) - 1)); |
1167 | while ((ols > ofd) && (nls > nfd)) |
1168 | { |
1169 | memset (&ps_old, 0, sizeof (mbstate_t)); |
1170 | memset (&ps_new, 0, sizeof (mbstate_t)); |
1171 | |
1172 | _rl_adjust_point (old, ols - old, &ps_old); |
1173 | _rl_adjust_point (new, nls - new, &ps_new); |
1174 | |
1175 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) |
1176 | break; |
1177 | |
1178 | if (*ols == ' ') |
1179 | wsatend = 0; |
1180 | |
1181 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY)(((ols - old) == 0) ? (ols - old) : ((ols - old) - 1)); |
1182 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY)(((nls - new) == 0) ? (nls - new) : ((nls - new) - 1)); |
1183 | } |
1184 | } |
1185 | else |
1186 | { |
1187 | #endif /* HANDLE_MULTIBYTE */ |
1188 | ols = oe - 1; /* find last same */ |
1189 | nls = ne - 1; |
1190 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) |
1191 | { |
1192 | if (*ols != ' ') |
1193 | wsatend = 0; |
1194 | ols--; |
1195 | nls--; |
1196 | } |
1197 | #if defined (HANDLE_MULTIBYTE) |
1198 | } |
1199 | #endif |
1200 | |
1201 | if (wsatend) |
1202 | { |
1203 | ols = oe; |
1204 | nls = ne; |
1205 | } |
1206 | #if defined (HANDLE_MULTIBYTE) |
1207 | /* This may not work for stateful encoding, but who cares? To handle |
1208 | stateful encoding properly, we have to scan each string from the |
1209 | beginning and compare. */ |
1210 | else if (_rl_compare_chars (ols, 0, NULL((void *)0), nls, 0, NULL((void *)0)) == 0) |
1211 | #else |
1212 | else if (*ols != *nls) |
1213 | #endif |
1214 | { |
1215 | if (*ols) /* don't step past the NUL */ |
1216 | { |
1217 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1218 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY)((ols - old) + (1)); |
1219 | else |
1220 | ols++; |
1221 | } |
1222 | if (*nls) |
1223 | { |
1224 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1225 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY)((nls - new) + (1)); |
1226 | else |
1227 | nls++; |
1228 | } |
1229 | } |
1230 | |
1231 | /* count of invisible characters in the current invisible line. */ |
1232 | current_invis_chars = W_OFFSET (current_line, wrap_offset)((current_line) == 0 ? wrap_offset : 0); |
1233 | if (_rl_last_v_pos != current_line) |
1234 | { |
1235 | _rl_move_vert (current_line); |
1236 | if (current_line == 0 && visible_wrap_offset) |
1237 | _rl_last_c_pos += visible_wrap_offset; |
1238 | } |
1239 | |
1240 | /* If this is the first line and there are invisible characters in the |
1241 | prompt string, and the prompt string has not changed, and the current |
1242 | cursor position is before the last invisible character in the prompt, |
1243 | and the index of the character to move to is past the end of the prompt |
1244 | string, then redraw the entire prompt string. We can only do this |
1245 | reliably if the terminal supports a `cr' capability. |
1246 | |
1247 | This is not an efficiency hack -- there is a problem with redrawing |
1248 | portions of the prompt string if they contain terminal escape |
1249 | sequences (like drawing the `unbold' sequence without a corresponding |
1250 | `bold') that manifests itself on certain terminals. */ |
1251 | |
1252 | lendiff = local_prompt ? strlen (local_prompt) : 0; |
1253 | od = ofd - old; /* index of first difference in visible line */ |
1254 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
1255 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
1256 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) |
1257 | { |
1258 | #if defined (__MSDOS__) |
1259 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
1260 | #else |
1261 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1262 | #endif |
1263 | _rl_output_some_chars (local_prompt, lendiff); |
1264 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1265 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff)(((lendiff) <= (0)) ? 0 : (lendiff) - (0)); |
1266 | else |
1267 | _rl_last_c_pos = lendiff; |
1268 | } |
1269 | |
1270 | _rl_move_cursor_relative (od, old); |
1271 | |
1272 | /* if (len (new) > len (old)) |
1273 | lendiff == difference in buffer |
1274 | col_lendiff == difference on screen |
1275 | When not using multibyte characters, these are equal */ |
1276 | lendiff = (nls - nfd) - (ols - ofd); |
1277 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1278 | col_lendiff = _rl_col_width (new, nfd - new, nls - new)(((nls - new) <= (nfd - new)) ? 0 : (nls - new) - (nfd - new )) - _rl_col_width (old, ofd - old, ols - old)(((ols - old) <= (ofd - old)) ? 0 : (ols - old) - (ofd - old )); |
1279 | else |
1280 | col_lendiff = lendiff; |
1281 | |
1282 | /* If we are changing the number of invisible characters in a line, and |
1283 | the spot of first difference is before the end of the invisible chars, |
1284 | lendiff needs to be adjusted. */ |
1285 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
1286 | current_invis_chars != visible_wrap_offset) |
1287 | { |
1288 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1289 | { |
1290 | lendiff += visible_wrap_offset - current_invis_chars; |
1291 | col_lendiff += visible_wrap_offset - current_invis_chars; |
1292 | } |
1293 | else |
1294 | { |
1295 | lendiff += visible_wrap_offset - current_invis_chars; |
1296 | col_lendiff = lendiff; |
1297 | } |
1298 | } |
1299 | |
1300 | /* Insert (diff (len (old), len (new)) ch. */ |
1301 | temp = ne - nfd; |
1302 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1303 | col_temp = _rl_col_width (new, nfd - new, ne - new)(((ne - new) <= (nfd - new)) ? 0 : (ne - new) - (nfd - new )); |
1304 | else |
1305 | col_temp = temp; |
1306 | |
1307 | if (col_lendiff > 0) /* XXX - was lendiff */ |
1308 | { |
1309 | /* Non-zero if we're increasing the number of lines. */ |
1310 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; |
1311 | /* Sometimes it is cheaper to print the characters rather than |
1312 | use the terminal's capabilities. If we're growing the number |
1313 | of lines, make sure we actually cause the new line to wrap |
1314 | around on auto-wrapping terminals. */ |
1315 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
1316 | { |
1317 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
1318 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
1319 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
1320 | invisible characters. We need to just draw them. */ |
1321 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || |
1322 | lendiff <= prompt_visible_length || !current_invis_chars)) |
1323 | { |
1324 | insert_some_chars (nfd, lendiff, col_lendiff); |
1325 | _rl_last_c_pos += col_lendiff; |
1326 | } |
1327 | else if (*ols == 0) |
1328 | { |
1329 | /* At the end of a line the characters do not have to |
1330 | be "inserted". They can just be placed on the screen. */ |
1331 | /* However, this screws up the rest of this block, which |
1332 | assumes you've done the insert because you can. */ |
1333 | _rl_output_some_chars (nfd, lendiff); |
1334 | _rl_last_c_pos += col_lendiff; |
1335 | } |
1336 | else |
1337 | { |
1338 | /* We have horizontal scrolling and we are not inserting at |
1339 | the end. We have invisible characters in this line. This |
1340 | is a dumb update. */ |
1341 | _rl_output_some_chars (nfd, temp); |
1342 | _rl_last_c_pos += col_temp; |
1343 | return; |
1344 | } |
1345 | /* Copy (new) chars to screen from first diff to last match. */ |
1346 | temp = nls - nfd; |
1347 | if ((temp - lendiff) > 0) |
1348 | { |
1349 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); |
1350 | #if 0 |
1351 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff)(((temp-col_lendiff) <= (0)) ? 0 : (temp-col_lendiff) - (0 )); |
1352 | #else |
1353 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff)(((temp-lendiff) <= (0)) ? 0 : (temp-lendiff) - (0)); |
1354 | #endif |
1355 | } |
1356 | } |
1357 | else |
1358 | { |
1359 | /* cannot insert chars, write to EOL */ |
1360 | _rl_output_some_chars (nfd, temp); |
1361 | _rl_last_c_pos += col_temp; |
1362 | } |
1363 | } |
1364 | else /* Delete characters from line. */ |
1365 | { |
1366 | /* If possible and inexpensive to use terminal deletion, then do so. */ |
1367 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
1368 | { |
1369 | /* If all we're doing is erasing the invisible characters in the |
1370 | prompt string, don't bother. It screws up the assumptions |
1371 | about what's on the screen. */ |
1372 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && |
1373 | -lendiff == visible_wrap_offset) |
1374 | col_lendiff = 0; |
1375 | |
1376 | if (col_lendiff) |
1377 | delete_chars (-col_lendiff); /* delete (diff) characters */ |
1378 | |
1379 | /* Copy (new) chars to screen from first diff to last match */ |
1380 | temp = nls - nfd; |
1381 | if (temp > 0) |
1382 | { |
1383 | _rl_output_some_chars (nfd, temp); |
1384 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp)(((temp) <= (0)) ? 0 : (temp) - (0));; |
1385 | } |
1386 | } |
1387 | /* Otherwise, print over the existing material. */ |
1388 | else |
1389 | { |
1390 | if (temp > 0) |
1391 | { |
1392 | _rl_output_some_chars (nfd, temp); |
1393 | _rl_last_c_pos += col_temp; |
1394 | } |
1395 | lendiff = (oe - old) - (ne - new); |
1396 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1397 | col_lendiff = _rl_col_width (old, 0, oe - old)(((oe - old) <= (0)) ? 0 : (oe - old) - (0)) - _rl_col_width (new, 0, ne - new)(((ne - new) <= (0)) ? 0 : (ne - new) - (0)); |
1398 | else |
1399 | col_lendiff = lendiff; |
1400 | |
1401 | if (col_lendiff) |
1402 | { |
1403 | if (_rl_term_autowrap && current_line < inv_botlin) |
1404 | space_to_eol (col_lendiff); |
1405 | else |
1406 | _rl_clear_to_eol (col_lendiff); |
1407 | } |
1408 | } |
1409 | } |
1410 | } |
1411 | |
1412 | /* Tell the update routines that we have moved onto a new (empty) line. */ |
1413 | int |
1414 | rl_on_new_line () |
1415 | { |
1416 | if (visible_line) |
1417 | visible_line[0] = '\0'; |
1418 | |
1419 | _rl_last_c_pos = _rl_last_v_pos = 0; |
1420 | _rl_vis_botlin = last_lmargin = 0; |
1421 | if (vis_lbreaks) |
1422 | vis_lbreaks[0] = vis_lbreaks[1] = 0; |
1423 | visible_wrap_offset = 0; |
1424 | return 0; |
1425 | } |
1426 | |
1427 | /* Tell the update routines that we have moved onto a new line with the |
1428 | prompt already displayed. Code originally from the version of readline |
1429 | distributed with CLISP. */ |
1430 | int |
1431 | rl_on_new_line_with_prompt () |
1432 | { |
1433 | int prompt_size, i, l, real_screenwidth, newlines; |
1434 | char *prompt_last_line; |
1435 | |
1436 | /* Initialize visible_line and invisible_line to ensure that they can hold |
1437 | the already-displayed prompt. */ |
1438 | prompt_size = strlen (rl_prompt) + 1; |
1439 | init_line_structures (prompt_size); |
1440 | |
1441 | /* Make sure the line structures hold the already-displayed prompt for |
1442 | redisplay. */ |
1443 | strlcpy (visible_line, rl_prompt, line_size); |
1444 | strlcpy (invisible_line, rl_prompt, line_size); |
1445 | |
1446 | /* If the prompt contains newlines, take the last tail. */ |
1447 | prompt_last_line = strrchr (rl_prompt, '\n'); |
1448 | if (!prompt_last_line) |
1449 | prompt_last_line = rl_prompt; |
1450 | |
1451 | l = strlen (prompt_last_line); |
1452 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1453 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l)(((l) <= (0)) ? 0 : (l) - (0)); |
1454 | else |
1455 | _rl_last_c_pos = l; |
1456 | |
1457 | /* Dissect prompt_last_line into screen lines. Note that here we have |
1458 | to use the real screenwidth. Readline's notion of screenwidth might be |
1459 | one less, see terminal.c. */ |
1460 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
1461 | _rl_last_v_pos = l / real_screenwidth; |
1462 | /* If the prompt length is a multiple of real_screenwidth, we don't know |
1463 | whether the cursor is at the end of the last line, or already at the |
1464 | beginning of the next line. Output a newline just to be safe. */ |
1465 | if (l > 0 && (l % real_screenwidth) == 0) |
1466 | _rl_output_some_chars ("\n", 1); |
1467 | last_lmargin = 0; |
1468 | |
1469 | newlines = 0; i = 0; |
1470 | while (i <= l) |
1471 | { |
1472 | _rl_vis_botlin = newlines; |
1473 | vis_lbreaks[newlines++] = i; |
1474 | i += real_screenwidth; |
1475 | } |
1476 | vis_lbreaks[newlines] = l; |
1477 | visible_wrap_offset = 0; |
1478 | |
1479 | return 0; |
1480 | } |
1481 | |
1482 | /* Actually update the display, period. */ |
1483 | int |
1484 | rl_forced_update_display () |
1485 | { |
1486 | if (visible_line) |
1487 | { |
1488 | register char *temp = visible_line; |
1489 | |
1490 | while (*temp) |
1491 | *temp++ = '\0'; |
1492 | } |
1493 | rl_on_new_line (); |
1494 | forced_display++; |
1495 | (*rl_redisplay_function) (); |
1496 | return 0; |
1497 | } |
1498 | |
1499 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. |
1500 | DATA is the contents of the screen line of interest; i.e., where |
1501 | the movement is being done. */ |
1502 | void |
1503 | _rl_move_cursor_relative (new, data) |
1504 | int new; |
1505 | const char *data; |
1506 | { |
1507 | register int i; |
1508 | |
1509 | /* If we don't have to do anything, then return. */ |
1510 | #if defined (HANDLE_MULTIBYTE) |
1511 | /* If we have multibyte characters, NEW is indexed by the buffer point in |
1512 | a multibyte string, but _rl_last_c_pos is the display position. In |
1513 | this case, NEW's display position is not obvious and must be |
1514 | calculated. */ |
1515 | if (MB_CUR_MAX1 == 1 || rl_byte_oriented) |
1516 | { |
1517 | if (_rl_last_c_pos == new) |
1518 | return; |
1519 | } |
1520 | else if (_rl_last_c_pos == _rl_col_width (data, 0, new)(((new) <= (0)) ? 0 : (new) - (0))) |
1521 | return; |
1522 | #else |
1523 | if (_rl_last_c_pos == new) return; |
1524 | #endif |
1525 | |
1526 | /* It may be faster to output a CR, and then move forwards instead |
1527 | of moving backwards. */ |
1528 | /* i == current physical cursor position. */ |
1529 | i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset)((_rl_last_v_pos) == 0 ? visible_wrap_offset : 0); |
1530 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos)(((new) + 1) < ((_rl_last_c_pos) - (new))) || |
1531 | (_rl_term_autowrap && i == _rl_screenwidth)) |
1532 | { |
1533 | #if defined (__MSDOS__) |
1534 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
1535 | #else |
1536 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1537 | #endif /* !__MSDOS__ */ |
1538 | _rl_last_c_pos = 0; |
1539 | } |
1540 | |
1541 | if (_rl_last_c_pos < new) |
1542 | { |
1543 | /* Move the cursor forward. We do it by printing the command |
1544 | to move the cursor forward if there is one, else print that |
1545 | portion of the output buffer again. Which is cheaper? */ |
1546 | |
1547 | /* The above comment is left here for posterity. It is faster |
1548 | to print one character (non-control) than to print a control |
1549 | sequence telling the terminal to move forward one character. |
1550 | That kind of control is for people who don't know what the |
1551 | data is underneath the cursor. */ |
1552 | #if defined (HACK_TERMCAP_MOTION) |
1553 | if (_rl_term_forward_char) |
1554 | { |
1555 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1556 | { |
1557 | int width; |
1558 | width = _rl_col_width (data, _rl_last_c_pos, new)(((new) <= (_rl_last_c_pos)) ? 0 : (new) - (_rl_last_c_pos )); |
1559 | for (i = 0; i < width; i++) |
1560 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); |
1561 | } |
1562 | else |
1563 | { |
1564 | for (i = _rl_last_c_pos; i < new; i++) |
1565 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); |
1566 | } |
1567 | } |
1568 | else if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1569 | { |
1570 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1571 | for (i = 0; i < new; i++) |
1572 | putc (data[i], rl_outstream)(!__isthreaded ? __sputc(data[i], rl_outstream) : (putc)(data [i], rl_outstream)); |
1573 | } |
1574 | else |
1575 | for (i = _rl_last_c_pos; i < new; i++) |
1576 | putc (data[i], rl_outstream)(!__isthreaded ? __sputc(data[i], rl_outstream) : (putc)(data [i], rl_outstream)); |
1577 | |
1578 | #else /* !HACK_TERMCAP_MOTION */ |
1579 | |
1580 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1581 | { |
1582 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1583 | for (i = 0; i < new; i++) |
1584 | putc (data[i], rl_outstream)(!__isthreaded ? __sputc(data[i], rl_outstream) : (putc)(data [i], rl_outstream)); |
1585 | } |
1586 | else |
1587 | for (i = _rl_last_c_pos; i < new; i++) |
1588 | putc (data[i], rl_outstream)(!__isthreaded ? __sputc(data[i], rl_outstream) : (putc)(data [i], rl_outstream)); |
1589 | |
1590 | #endif /* !HACK_TERMCAP_MOTION */ |
1591 | |
1592 | } |
1593 | #if defined (HANDLE_MULTIBYTE) |
1594 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. |
1595 | The byte length of the string is probably bigger than the column width |
1596 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's |
1597 | display point is less than _rl_last_c_pos. */ |
1598 | else if (_rl_last_c_pos >= new) |
1599 | #else |
1600 | else if (_rl_last_c_pos > new) |
1601 | #endif |
1602 | { |
1603 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1604 | _rl_backspace (_rl_last_c_pos - _rl_col_width (data, 0, new)(((new) <= (0)) ? 0 : (new) - (0))); |
1605 | else |
1606 | _rl_backspace (_rl_last_c_pos - new); |
1607 | } |
1608 | |
1609 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
1610 | _rl_last_c_pos = _rl_col_width (data, 0, new)(((new) <= (0)) ? 0 : (new) - (0)); |
1611 | else |
1612 | _rl_last_c_pos = new; |
1613 | } |
1614 | |
1615 | /* PWP: move the cursor up or down. */ |
1616 | void |
1617 | _rl_move_vert (to) |
1618 | int to; |
1619 | { |
1620 | register int delta, i; |
1621 | |
1622 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
1623 | return; |
1624 | |
1625 | if ((delta = to - _rl_last_v_pos) > 0) |
1626 | { |
1627 | for (i = 0; i < delta; i++) |
1628 | putc ('\n', rl_outstream)(!__isthreaded ? __sputc('\n', rl_outstream) : (putc)('\n', rl_outstream )); |
1629 | #if defined (__MSDOS__) |
1630 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
1631 | #else |
1632 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1633 | #endif |
1634 | _rl_last_c_pos = 0; |
1635 | } |
1636 | else |
1637 | { /* delta < 0 */ |
1638 | if (_rl_term_up && *_rl_term_up) |
1639 | for (i = 0; i < -delta; i++) |
1640 | tputs (_rl_term_up, 1, _rl_output_character_function); |
1641 | } |
1642 | |
1643 | _rl_last_v_pos = to; /* Now TO is here */ |
1644 | } |
1645 | |
1646 | /* Physically print C on rl_outstream. This is for functions which know |
1647 | how to optimize the display. Return the number of characters output. */ |
1648 | int |
1649 | rl_show_char (c) |
1650 | int c; |
1651 | { |
1652 | int n = 1; |
1653 | if (META_CHAR (c)((c) > 0x07f && (c) <= 255) && (_rl_output_meta_chars == 0)) |
1654 | { |
1655 | fprintf (rl_outstream, "M-"); |
1656 | n += 2; |
1657 | c = UNMETA (c)((c) & (~0x080)); |
1658 | } |
1659 | |
1660 | #if defined (DISPLAY_TABS) |
1661 | if ((CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) && c != '\t') || c == RUBOUT0x7f) |
1662 | #else |
1663 | if (CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) || c == RUBOUT0x7f) |
1664 | #endif /* !DISPLAY_TABS */ |
1665 | { |
1666 | fprintf (rl_outstream, "C-"); |
1667 | n += 2; |
1668 | c = CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) ? UNCTRL (c)((((unsigned char)(((c)|0x40)) == (((c)|0x40))) && (isascii (((c)|0x40)) && islower (((c)|0x40)))) ? toupper((unsigned char)((c)|0x40)) : (((c)|0x40))) : '?'; |
1669 | } |
1670 | |
1671 | putc (c, rl_outstream)(!__isthreaded ? __sputc(c, rl_outstream) : (putc)(c, rl_outstream )); |
1672 | fflush (rl_outstream); |
1673 | return n; |
1674 | } |
1675 | |
1676 | int |
1677 | rl_character_len (c, pos) |
1678 | register int c, pos; |
1679 | { |
1680 | unsigned char uc; |
1681 | |
1682 | uc = (unsigned char)c; |
1683 | |
1684 | if (META_CHAR (uc)((uc) > 0x07f && (uc) <= 255)) |
1685 | return ((_rl_output_meta_chars == 0) ? 4 : 1); |
1686 | |
1687 | if (uc == '\t') |
1688 | { |
1689 | #if defined (DISPLAY_TABS) |
1690 | return (((pos | 7) + 1) - pos); |
1691 | #else |
1692 | return (2); |
1693 | #endif /* !DISPLAY_TABS */ |
1694 | } |
1695 | |
1696 | if (CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) || c == RUBOUT0x7f) |
1697 | return (2); |
1698 | |
1699 | return ((ISPRINT (uc)(isascii(uc) && isprint (uc))) ? 1 : 2); |
1700 | } |
1701 | |
1702 | /* How to print things in the "echo-area". The prompt is treated as a |
1703 | mini-modeline. */ |
1704 | |
1705 | #if defined (USE_VARARGS) |
1706 | int |
1707 | #if defined (PREFER_STDARG) |
1708 | rl_message (const char *format, ...) |
1709 | #else |
1710 | rl_message (va_alist) |
1711 | va_dcl |
1712 | #endif |
1713 | { |
1714 | va_list args; |
1715 | #if defined (PREFER_VARARGS) |
1716 | char *format; |
1717 | #endif |
1718 | |
1719 | #if defined (PREFER_STDARG) |
1720 | va_start (args, format)__builtin_va_start(args, format); |
1721 | #else |
1722 | va_start (args); |
1723 | format = va_arg (args, char *)__builtin_va_arg(args, char *); |
1724 | #endif |
1725 | |
1726 | #if defined (HAVE_VSNPRINTF1) |
1727 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); |
1728 | #else |
1729 | vsprintf (msg_buf, format, args); |
1730 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1731 | #endif |
1732 | va_end (args)__builtin_va_end(args); |
1733 | |
1734 | rl_display_prompt = msg_buf; |
1735 | (*rl_redisplay_function) (); |
1736 | return 0; |
1737 | } |
1738 | #else /* !USE_VARARGS */ |
1739 | int |
1740 | rl_message (format, arg1, arg2) |
1741 | char *format; |
1742 | { |
1743 | snprintf (msg_buf, sizeof(msg_buf), format, arg1, arg2); |
1744 | rl_display_prompt = msg_buf; |
1745 | (*rl_redisplay_function) (); |
1746 | return 0; |
1747 | } |
1748 | #endif /* !USE_VARARGS */ |
1749 | |
1750 | /* How to clear things from the "echo-area". */ |
1751 | int |
1752 | rl_clear_message () |
1753 | { |
1754 | rl_display_prompt = rl_prompt; |
1755 | (*rl_redisplay_function) (); |
1756 | return 0; |
1757 | } |
1758 | |
1759 | int |
1760 | rl_reset_line_state () |
1761 | { |
1762 | rl_on_new_line (); |
1763 | |
1764 | rl_display_prompt = rl_prompt ? rl_prompt : ""; |
1765 | forced_display = 1; |
1766 | return 0; |
1767 | } |
1768 | |
1769 | static char *saved_local_prompt; |
1770 | static char *saved_local_prefix; |
1771 | static int saved_last_invisible; |
1772 | static int saved_visible_length; |
1773 | |
1774 | void |
1775 | rl_save_prompt () |
1776 | { |
1777 | saved_local_prompt = local_prompt; |
1778 | saved_local_prefix = local_prompt_prefix; |
1779 | saved_last_invisible = prompt_last_invisible; |
1780 | saved_visible_length = prompt_visible_length; |
1781 | |
1782 | local_prompt = local_prompt_prefix = (char *)0; |
1783 | prompt_last_invisible = prompt_visible_length = 0; |
1784 | } |
1785 | |
1786 | void |
1787 | rl_restore_prompt () |
1788 | { |
1789 | FREE (local_prompt)if (local_prompt) free (local_prompt); |
1790 | FREE (local_prompt_prefix)if (local_prompt_prefix) free (local_prompt_prefix); |
1791 | |
1792 | local_prompt = saved_local_prompt; |
1793 | local_prompt_prefix = saved_local_prefix; |
1794 | prompt_last_invisible = saved_last_invisible; |
1795 | prompt_visible_length = saved_visible_length; |
1796 | } |
1797 | |
1798 | char * |
1799 | _rl_make_prompt_for_search (pchar) |
1800 | int pchar; |
1801 | { |
1802 | int len; |
1803 | char *pmt; |
1804 | |
1805 | rl_save_prompt (); |
1806 | |
1807 | if (saved_local_prompt == 0) |
1808 | { |
1809 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; |
1810 | pmt = (char *)xmalloc (len + 2); |
1811 | if (len) |
1812 | strlcpy (pmt, rl_prompt, len + 2); |
1813 | pmt[len] = pchar; |
1814 | pmt[len+1] = '\0'; |
1815 | } |
1816 | else |
1817 | { |
1818 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; |
1819 | pmt = (char *)xmalloc (len + 2); |
1820 | if (len) |
1821 | strlcpy (pmt, saved_local_prompt, len + 2); |
1822 | pmt[len] = pchar; |
1823 | pmt[len+1] = '\0'; |
1824 | local_prompt = savestring (pmt)xstrdup(pmt); |
1825 | prompt_last_invisible = saved_last_invisible; |
1826 | prompt_visible_length = saved_visible_length + 1; |
1827 | } |
1828 | return pmt; |
1829 | } |
1830 | |
1831 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
1832 | void |
1833 | _rl_erase_at_end_of_line (l) |
1834 | int l; |
1835 | { |
1836 | register int i; |
1837 | |
1838 | _rl_backspace (l); |
1839 | for (i = 0; i < l; i++) |
1840 | putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream )); |
1841 | _rl_backspace (l); |
1842 | for (i = 0; i < l; i++) |
1843 | visible_line[--_rl_last_c_pos] = '\0'; |
1844 | rl_display_fixed++; |
1845 | } |
1846 | |
1847 | /* Clear to the end of the line. COUNT is the minimum |
1848 | number of character spaces to clear, */ |
1849 | void |
1850 | _rl_clear_to_eol (count) |
1851 | int count; |
1852 | { |
1853 | if (_rl_term_clreol) |
1854 | tputs (_rl_term_clreol, 1, _rl_output_character_function); |
1855 | else if (count) |
1856 | space_to_eol (count); |
1857 | } |
1858 | |
1859 | /* Clear to the end of the line using spaces. COUNT is the minimum |
1860 | number of character spaces to clear, */ |
1861 | static void |
1862 | space_to_eol (count) |
1863 | int count; |
1864 | { |
1865 | register int i; |
1866 | |
1867 | for (i = 0; i < count; i++) |
1868 | putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream )); |
1869 | |
1870 | _rl_last_c_pos += count; |
1871 | } |
1872 | |
1873 | void |
1874 | _rl_clear_screen () |
1875 | { |
1876 | if (_rl_term_clrpag) |
1877 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); |
1878 | else |
1879 | rl_crlf (); |
1880 | } |
1881 | |
1882 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
1883 | static void |
1884 | insert_some_chars (string, count, col) |
1885 | char *string; |
1886 | int count, col; |
1887 | { |
1888 | /* DEBUGGING */ |
1889 | if (MB_CUR_MAX1 == 1 || rl_byte_oriented) |
1890 | if (count != col) |
1891 | fprintf(stderr(&__sF[2]), "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); |
1892 | |
1893 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
1894 | if (_rl_term_IC) |
1895 | { |
1896 | char *buffer; |
1897 | |
1898 | buffer = tgoto (_rl_term_IC, 0, col); |
1899 | tputs (buffer, 1, _rl_output_character_function); |
1900 | _rl_output_some_chars (string, count); |
1901 | } |
1902 | else |
1903 | { |
1904 | register int i; |
1905 | |
1906 | /* If we have to turn on insert-mode, then do so. */ |
1907 | if (_rl_term_im && *_rl_term_im) |
1908 | tputs (_rl_term_im, 1, _rl_output_character_function); |
1909 | |
1910 | /* If there is a special command for inserting characters, then |
1911 | use that first to open up the space. */ |
1912 | if (_rl_term_ic && *_rl_term_ic) |
1913 | { |
1914 | for (i = col; i--; ) |
1915 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
1916 | } |
1917 | |
1918 | /* Print the text. */ |
1919 | _rl_output_some_chars (string, count); |
1920 | |
1921 | /* If there is a string to turn off insert mode, we had best use |
1922 | it now. */ |
1923 | if (_rl_term_ei && *_rl_term_ei) |
1924 | tputs (_rl_term_ei, 1, _rl_output_character_function); |
1925 | } |
1926 | } |
1927 | |
1928 | /* Delete COUNT characters from the display line. */ |
1929 | static void |
1930 | delete_chars (count) |
1931 | int count; |
1932 | { |
1933 | if (count > _rl_screenwidth) /* XXX */ |
1934 | return; |
1935 | |
1936 | if (_rl_term_DC && *_rl_term_DC) |
1937 | { |
1938 | char *buffer; |
1939 | buffer = tgoto (_rl_term_DC, count, count); |
1940 | tputs (buffer, count, _rl_output_character_function); |
1941 | } |
1942 | else |
1943 | { |
1944 | if (_rl_term_dc && *_rl_term_dc) |
1945 | while (count--) |
1946 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
1947 | } |
1948 | } |
1949 | |
1950 | void |
1951 | _rl_update_final () |
1952 | { |
1953 | int full_lines; |
1954 | |
1955 | full_lines = 0; |
1956 | /* If the cursor is the only thing on an otherwise-blank last line, |
1957 | compensate so we don't print an extra CRLF. */ |
1958 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && |
1959 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
1960 | { |
1961 | _rl_vis_botlin--; |
1962 | full_lines = 1; |
1963 | } |
1964 | _rl_move_vert (_rl_vis_botlin); |
1965 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
1966 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin)((_rl_vis_botlin) > _rl_vis_botlin ? 0 : (vis_lbreaks[_rl_vis_botlin +1] - vis_lbreaks[_rl_vis_botlin])) == _rl_screenwidth)) |
1967 | { |
1968 | char *last_line; |
1969 | |
1970 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
1971 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
1972 | _rl_clear_to_eol (0); |
1973 | putc (last_line[_rl_screenwidth - 1], rl_outstream)(!__isthreaded ? __sputc(last_line[_rl_screenwidth - 1], rl_outstream ) : (putc)(last_line[_rl_screenwidth - 1], rl_outstream)); |
1974 | } |
1975 | _rl_vis_botlin = 0; |
1976 | rl_crlf (); |
1977 | fflush (rl_outstream); |
1978 | rl_display_fixed++; |
1979 | } |
1980 | |
1981 | /* Move to the start of the current line. */ |
1982 | static void |
1983 | cr () |
1984 | { |
1985 | if (_rl_term_cr) |
1986 | { |
1987 | #if defined (__MSDOS__) |
1988 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
1989 | #else |
1990 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1991 | #endif |
1992 | _rl_last_c_pos = 0; |
1993 | } |
1994 | } |
1995 | |
1996 | /* Redraw the last line of a multi-line prompt that may possibly contain |
1997 | terminal escape sequences. Called with the cursor at column 0 of the |
1998 | line to draw the prompt on. */ |
1999 | static void |
2000 | redraw_prompt (t) |
2001 | char *t; |
2002 | { |
2003 | char *oldp, *oldl, *oldlprefix; |
2004 | int oldlen, oldlast, oldplen, oldninvis; |
2005 | |
2006 | /* Geez, I should make this a struct. */ |
2007 | oldp = rl_display_prompt; |
2008 | oldl = local_prompt; |
2009 | oldlprefix = local_prompt_prefix; |
2010 | oldlen = prompt_visible_length; |
2011 | oldplen = prompt_prefix_length; |
2012 | oldlast = prompt_last_invisible; |
2013 | oldninvis = prompt_invis_chars_first_line; |
2014 | |
2015 | rl_display_prompt = t; |
2016 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2017 | &prompt_last_invisible, |
2018 | &prompt_invis_chars_first_line); |
2019 | local_prompt_prefix = (char *)NULL((void *)0); |
2020 | rl_forced_update_display (); |
2021 | |
2022 | rl_display_prompt = oldp; |
2023 | local_prompt = oldl; |
2024 | local_prompt_prefix = oldlprefix; |
2025 | prompt_visible_length = oldlen; |
2026 | prompt_prefix_length = oldplen; |
2027 | prompt_last_invisible = oldlast; |
2028 | prompt_invis_chars_first_line = oldninvis; |
2029 | } |
2030 | |
2031 | /* Redisplay the current line after a SIGWINCH is received. */ |
2032 | void |
2033 | _rl_redisplay_after_sigwinch () |
2034 | { |
2035 | char *t; |
2036 | |
2037 | /* Clear the current line and put the cursor at column 0. Make sure |
2038 | the right thing happens if we have wrapped to a new screen line. */ |
2039 | if (_rl_term_cr) |
2040 | { |
2041 | #if defined (__MSDOS__) |
2042 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
2043 | #else |
2044 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
2045 | #endif |
2046 | _rl_last_c_pos = 0; |
2047 | #if defined (__MSDOS__) |
2048 | space_to_eol (_rl_screenwidth); |
2049 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
2050 | #else |
2051 | if (_rl_term_clreol) |
2052 | tputs (_rl_term_clreol, 1, _rl_output_character_function); |
2053 | else |
2054 | { |
2055 | space_to_eol (_rl_screenwidth); |
2056 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
2057 | } |
2058 | #endif |
2059 | if (_rl_last_v_pos > 0) |
2060 | _rl_move_vert (0); |
2061 | } |
2062 | else |
2063 | rl_crlf (); |
2064 | |
2065 | /* Redraw only the last line of a multi-line prompt. */ |
2066 | t = strrchr (rl_display_prompt, '\n'); |
2067 | if (t) |
2068 | redraw_prompt (++t); |
2069 | else |
2070 | rl_forced_update_display (); |
2071 | } |
2072 | |
2073 | void |
2074 | _rl_clean_up_for_exit () |
2075 | { |
2076 | if (readline_echoing_p) |
2077 | { |
2078 | _rl_move_vert (_rl_vis_botlin); |
2079 | _rl_vis_botlin = 0; |
2080 | fflush (rl_outstream); |
2081 | rl_restart_output (1, 0); |
2082 | } |
2083 | } |
2084 | |
2085 | void |
2086 | _rl_erase_entire_line () |
2087 | { |
2088 | cr (); |
2089 | _rl_clear_to_eol (0); |
2090 | cr (); |
2091 | fflush (rl_outstream); |
2092 | } |
2093 | |
2094 | /* return the `current display line' of the cursor -- the number of lines to |
2095 | move up to get to the first screen line of the current readline line. */ |
2096 | int |
2097 | _rl_current_display_line () |
2098 | { |
2099 | int ret, nleft; |
2100 | |
2101 | /* Find out whether or not there might be invisible characters in the |
2102 | editing buffer. */ |
2103 | if (rl_display_prompt == rl_prompt) |
2104 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
2105 | else |
2106 | nleft = _rl_last_c_pos - _rl_screenwidth; |
2107 | |
2108 | if (nleft > 0) |
2109 | ret = 1 + nleft / _rl_screenwidth; |
2110 | else |
2111 | ret = 0; |
2112 | |
2113 | return ret; |
2114 | } |
2115 | |
2116 | #if defined (HANDLE_MULTIBYTE) |
2117 | /* Calculate the number of screen columns occupied by STR from START to END. |
2118 | In the case of multibyte characters with stateful encoding, we have to |
2119 | scan from the beginning of the string to take the state into account. */ |
2120 | static int |
2121 | _rl_col_width (str, start, end)(((end) <= (start)) ? 0 : (end) - (start)) |
2122 | const char *str; |
2123 | int start, end; |
2124 | { |
2125 | wchar_t wc; |
2126 | mbstate_t ps = {0}; |
2127 | int tmp, point, width, max; |
2128 | |
2129 | if (end <= start) |
2130 | return 0; |
2131 | |
2132 | point = 0; |
2133 | max = end; |
2134 | |
2135 | while (point < start) |
2136 | { |
2137 | tmp = mbrlen (str + point, max, &ps); |
2138 | if ((size_t)tmp == (size_t)-1 || (size_t)tmp == (size_t)-2) |
2139 | { |
2140 | /* In this case, the bytes are invalid or too short to compose a |
2141 | multibyte character, so we assume that the first byte represents |
2142 | a single character. */ |
2143 | point++; |
2144 | max--; |
2145 | |
2146 | /* Clear the state of the byte sequence, because in this case the |
2147 | effect of mbstate is undefined. */ |
2148 | memset (&ps, 0, sizeof (mbstate_t)); |
2149 | } |
2150 | else if (tmp == 0) |
2151 | break; /* Found '\0' */ |
2152 | else |
2153 | { |
2154 | point += tmp; |
2155 | max -= tmp; |
2156 | } |
2157 | } |
2158 | |
2159 | /* If START is not a byte that starts a character, then POINT will be |
2160 | greater than START. In this case, assume that (POINT - START) gives |
2161 | a byte count that is the number of columns of difference. */ |
2162 | width = point - start; |
2163 | |
2164 | while (point < end) |
2165 | { |
2166 | tmp = mbrtowc (&wc, str + point, max, &ps); |
2167 | if ((size_t)tmp == (size_t)-1 || (size_t)tmp == (size_t)-2) |
2168 | { |
2169 | /* In this case, the bytes are invalid or too short to compose a |
2170 | multibyte character, so we assume that the first byte represents |
2171 | a single character. */ |
2172 | point++; |
2173 | max--; |
2174 | |
2175 | /* and assume that the byte occupies a single column. */ |
2176 | width++; |
2177 | |
2178 | /* Clear the state of the byte sequence, because in this case the |
2179 | effect of mbstate is undefined. */ |
2180 | memset (&ps, 0, sizeof (mbstate_t)); |
2181 | } |
2182 | else if (tmp == 0) |
2183 | break; /* Found '\0' */ |
2184 | else |
2185 | { |
2186 | point += tmp; |
2187 | max -= tmp; |
2188 | tmp = wcwidth(wc); |
2189 | width += (tmp >= 0) ? tmp : 1; |
2190 | } |
2191 | } |
2192 | |
2193 | width += point - end; |
2194 | |
2195 | return width; |
2196 | } |
2197 | #endif /* HANDLE_MULTIBYTE */ |