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726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
0628567a | 3 | /* Copyright (C) 1987-2006 Free Software Foundation, Inc. |
726f6388 JA |
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 | |
bb70624e | 10 | as published by the Free Software Foundation; either version 2, or |
726f6388 JA |
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, | |
bb70624e | 21 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 JA |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
ccc6cda3 | 25 | # include <config.h> |
726f6388 JA |
26 | #endif |
27 | ||
726f6388 JA |
28 | #include <sys/types.h> |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
d166f048 JA |
34 | #include "posixstat.h" |
35 | ||
726f6388 JA |
36 | #if defined (HAVE_STDLIB_H) |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
d166f048 JA |
42 | #include <stdio.h> |
43 | ||
726f6388 JA |
44 | /* System-specific feature definitions and include files. */ |
45 | #include "rldefs.h" | |
7117c2d2 | 46 | #include "rlmbutil.h" |
726f6388 | 47 | |
ccc6cda3 JA |
48 | /* Termcap library stuff. */ |
49 | #include "tcap.h" | |
50 | ||
726f6388 JA |
51 | /* Some standard library routines. */ |
52 | #include "readline.h" | |
53 | #include "history.h" | |
54 | ||
bb70624e JA |
55 | #include "rlprivate.h" |
56 | #include "xmalloc.h" | |
57 | ||
726f6388 JA |
58 | #if !defined (strchr) && !defined (__STDC__) |
59 | extern char *strchr (), *strrchr (); | |
60 | #endif /* !strchr && !__STDC__ */ | |
61 | ||
f73dda09 JA |
62 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
63 | static void space_to_eol PARAMS((int)); | |
64 | static void delete_chars PARAMS((int)); | |
7117c2d2 | 65 | static void insert_some_chars PARAMS((char *, int, int)); |
f73dda09 | 66 | static void cr PARAMS((void)); |
ccc6cda3 | 67 | |
7117c2d2 | 68 | #if defined (HANDLE_MULTIBYTE) |
b80f6443 | 69 | static int _rl_col_width PARAMS((const char *, int, int)); |
7117c2d2 JA |
70 | static int *_rl_wrapped_line; |
71 | #else | |
72 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
73 | #endif | |
74 | ||
ccc6cda3 | 75 | static int *inv_lbreaks, *vis_lbreaks; |
bb70624e | 76 | static int inv_lbsize, vis_lbsize; |
726f6388 JA |
77 | |
78 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
0628567a JA |
79 | by backing up or outputting a carriage return and moving forward. CUR |
80 | and NEW are either both buffer positions or absolute screen positions. */ | |
726f6388 JA |
81 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) |
82 | ||
0628567a JA |
83 | /* _rl_last_c_pos is an absolute cursor position in multibyte locales and a |
84 | buffer index in others. This macro is used when deciding whether the | |
85 | current cursor position is in the middle of a prompt string containing | |
86 | invisible characters. */ | |
87 | #define PROMPT_ENDING_INDEX \ | |
88 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1) | |
89 | ||
90 | ||
726f6388 JA |
91 | /* **************************************************************** */ |
92 | /* */ | |
93 | /* Display stuff */ | |
94 | /* */ | |
95 | /* **************************************************************** */ | |
96 | ||
97 | /* This is the stuff that is hard for me. I never seem to write good | |
98 | display routines in C. Let's see how I do this time. */ | |
99 | ||
100 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
101 | the problems of input lines longer than the screen width. | |
102 | ||
103 | update_line and the code that calls it makes a multiple line, | |
104 | automatically wrapping line update. Careful attention needs | |
105 | to be paid to the vertical position variables. */ | |
106 | ||
107 | /* Keep two buffers; one which reflects the current contents of the | |
108 | screen, and the other to draw what we think the new contents should | |
109 | be. Then compare the buffers, and make whatever changes to the | |
110 | screen itself that we should. Finally, make the buffer that we | |
111 | just drew into be the one which reflects the current contents of the | |
112 | screen, and place the cursor where it belongs. | |
113 | ||
114 | Commands that want to can fix the display themselves, and then let | |
115 | this function know that the display has been fixed by setting the | |
116 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
117 | ||
ccc6cda3 | 118 | /* Application-specific redisplay function. */ |
28ef6c31 | 119 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 120 | |
726f6388 JA |
121 | /* Global variables declared here. */ |
122 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
123 | int rl_display_fixed = 0; | |
124 | ||
ccc6cda3 | 125 | int _rl_suppress_redisplay = 0; |
95732b49 | 126 | int _rl_want_redisplay = 0; |
ccc6cda3 | 127 | |
726f6388 JA |
128 | /* The stuff that gets printed out before the actual text of the line. |
129 | This is usually pointing to rl_prompt. */ | |
130 | char *rl_display_prompt = (char *)NULL; | |
131 | ||
132 | /* Pseudo-global variables declared here. */ | |
95732b49 | 133 | |
726f6388 | 134 | /* The visible cursor position. If you print some text, adjust this. */ |
95732b49 JA |
135 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
136 | supporting multibyte characters, and an absolute cursor position when | |
137 | in such a locale. This is an artifact of the donated multibyte support. | |
138 | Care must be taken when modifying its value. */ | |
726f6388 JA |
139 | int _rl_last_c_pos = 0; |
140 | int _rl_last_v_pos = 0; | |
141 | ||
95732b49 | 142 | static int cpos_adjusted; |
0628567a | 143 | static int cpos_buffer_position; |
95732b49 | 144 | |
726f6388 JA |
145 | /* Number of lines currently on screen minus 1. */ |
146 | int _rl_vis_botlin = 0; | |
147 | ||
148 | /* Variables used only in this file. */ | |
149 | /* The last left edge of text that was displayed. This is used when | |
150 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 151 | static int last_lmargin; |
726f6388 JA |
152 | |
153 | /* The line display buffers. One is the line currently displayed on | |
154 | the screen. The other is the line about to be displayed. */ | |
155 | static char *visible_line = (char *)NULL; | |
156 | static char *invisible_line = (char *)NULL; | |
157 | ||
158 | /* A buffer for `modeline' messages. */ | |
159 | static char msg_buf[128]; | |
160 | ||
161 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 162 | static int forced_display; |
726f6388 JA |
163 | |
164 | /* Default and initial buffer size. Can grow. */ | |
165 | static int line_size = 1024; | |
166 | ||
28ef6c31 JA |
167 | /* Variables to keep track of the expanded prompt string, which may |
168 | include invisible characters. */ | |
169 | ||
726f6388 | 170 | static char *local_prompt, *local_prompt_prefix; |
0628567a | 171 | static int local_prompt_len; |
28ef6c31 | 172 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
173 | |
174 | /* The number of invisible characters in the line currently being | |
175 | displayed on the screen. */ | |
ccc6cda3 JA |
176 | static int visible_wrap_offset; |
177 | ||
28ef6c31 JA |
178 | /* The number of invisible characters in the prompt string. Static so it |
179 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
180 | static int wrap_offset; |
181 | ||
28ef6c31 JA |
182 | /* The index of the last invisible character in the prompt string. */ |
183 | static int prompt_last_invisible; | |
726f6388 JA |
184 | |
185 | /* The length (buffer offset) of the first line of the last (possibly | |
186 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 187 | static int visible_first_line_len; |
726f6388 | 188 | |
28ef6c31 JA |
189 | /* Number of invisible characters on the first physical line of the prompt. |
190 | Only valid when the number of physical characters in the prompt exceeds | |
191 | (or is equal to) _rl_screenwidth. */ | |
192 | static int prompt_invis_chars_first_line; | |
193 | ||
194 | static int prompt_last_screen_line; | |
195 | ||
b80f6443 JA |
196 | static int prompt_physical_chars; |
197 | ||
95732b49 JA |
198 | /* Variables to save and restore prompt and display information. */ |
199 | ||
200 | /* These are getting numerous enough that it's time to create a struct. */ | |
201 | ||
202 | static char *saved_local_prompt; | |
203 | static char *saved_local_prefix; | |
204 | static int saved_last_invisible; | |
205 | static int saved_visible_length; | |
206 | static int saved_prefix_length; | |
0628567a | 207 | static int saved_local_length; |
95732b49 JA |
208 | static int saved_invis_chars_first_line; |
209 | static int saved_physical_chars; | |
210 | ||
726f6388 JA |
211 | /* Expand the prompt string S and return the number of visible |
212 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 213 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
214 | index of the last invisible character in the returned string. NIFLP, |
215 | if non-zero, is a place to store the number of invisible characters in | |
b80f6443 JA |
216 | the first prompt line. The previous are used as byte counts -- indexes |
217 | into a character buffer. */ | |
726f6388 JA |
218 | |
219 | /* Current implementation: | |
220 | \001 (^A) start non-visible characters | |
221 | \002 (^B) end non-visible characters | |
222 | all characters except \001 and \002 (following a \001) are copied to | |
223 | the returned string; all characters except those between \001 and | |
224 | \002 are assumed to be `visible'. */ | |
225 | ||
226 | static char * | |
b80f6443 | 227 | expand_prompt (pmt, lp, lip, niflp, vlp) |
726f6388 | 228 | char *pmt; |
b80f6443 | 229 | int *lp, *lip, *niflp, *vlp; |
726f6388 | 230 | { |
0628567a | 231 | char *r, *ret, *p, *igstart; |
eb873671 | 232 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
726f6388 JA |
233 | |
234 | /* Short-circuit if we can. */ | |
b80f6443 | 235 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 JA |
236 | { |
237 | r = savestring (pmt); | |
238 | if (lp) | |
239 | *lp = strlen (r); | |
b80f6443 JA |
240 | if (lip) |
241 | *lip = 0; | |
242 | if (niflp) | |
243 | *niflp = 0; | |
244 | if (vlp) | |
245 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
246 | return r; |
247 | } | |
248 | ||
ccc6cda3 | 249 | l = strlen (pmt); |
f73dda09 | 250 | r = ret = (char *)xmalloc (l + 1); |
28ef6c31 JA |
251 | |
252 | invfl = 0; /* invisible chars in first line of prompt */ | |
eb873671 | 253 | invflset = 0; /* we only want to set invfl once */ |
28ef6c31 | 254 | |
0628567a | 255 | igstart = 0; |
b80f6443 | 256 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
726f6388 JA |
257 | { |
258 | /* This code strips the invisible character string markers | |
259 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
0628567a | 260 | if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */ |
726f6388 | 261 | { |
0628567a JA |
262 | ignoring = 1; |
263 | igstart = p; | |
726f6388 JA |
264 | continue; |
265 | } | |
266 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
267 | { | |
268 | ignoring = 0; | |
0628567a | 269 | if (p != (igstart + 1)) |
95732b49 | 270 | last = r - ret - 1; |
726f6388 JA |
271 | continue; |
272 | } | |
273 | else | |
274 | { | |
b80f6443 JA |
275 | #if defined (HANDLE_MULTIBYTE) |
276 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
277 | { | |
278 | pind = p - pmt; | |
279 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
280 | l = ind - pind; | |
281 | while (l--) | |
282 | *r++ = *p++; | |
283 | if (!ignoring) | |
eb873671 JA |
284 | { |
285 | rl += ind - pind; | |
286 | physchars += _rl_col_width (pmt, pind, ind); | |
287 | } | |
b80f6443 JA |
288 | else |
289 | ninvis += ind - pind; | |
290 | p--; /* compensate for later increment */ | |
291 | } | |
28ef6c31 | 292 | else |
b80f6443 JA |
293 | #endif |
294 | { | |
295 | *r++ = *p; | |
296 | if (!ignoring) | |
eb873671 JA |
297 | { |
298 | rl++; /* visible length byte counter */ | |
299 | physchars++; | |
300 | } | |
b80f6443 JA |
301 | else |
302 | ninvis++; /* invisible chars byte counter */ | |
303 | } | |
304 | ||
eb873671 JA |
305 | if (invflset == 0 && rl >= _rl_screenwidth) |
306 | { | |
307 | invfl = ninvis; | |
308 | invflset = 1; | |
309 | } | |
726f6388 JA |
310 | } |
311 | } | |
312 | ||
28ef6c31 JA |
313 | if (rl < _rl_screenwidth) |
314 | invfl = ninvis; | |
315 | ||
726f6388 JA |
316 | *r = '\0'; |
317 | if (lp) | |
318 | *lp = rl; | |
ccc6cda3 JA |
319 | if (lip) |
320 | *lip = last; | |
28ef6c31 JA |
321 | if (niflp) |
322 | *niflp = invfl; | |
b80f6443 JA |
323 | if (vlp) |
324 | *vlp = physchars; | |
726f6388 JA |
325 | return ret; |
326 | } | |
327 | ||
bb70624e JA |
328 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
329 | PMT and return the rest of PMT. */ | |
330 | char * | |
331 | _rl_strip_prompt (pmt) | |
332 | char *pmt; | |
333 | { | |
334 | char *ret; | |
335 | ||
b80f6443 | 336 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
337 | return ret; |
338 | } | |
339 | ||
726f6388 JA |
340 | /* |
341 | * Expand the prompt string into the various display components, if | |
342 | * necessary. | |
343 | * | |
344 | * local_prompt = expanded last line of string in rl_display_prompt | |
345 | * (portion after the final newline) | |
346 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
347 | * expanded via expand_prompt | |
28ef6c31 JA |
348 | * prompt_visible_length = number of visible characters in local_prompt |
349 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
350 | * |
351 | * This function is called once per call to readline(). It may also be | |
352 | * called arbitrarily to expand the primary prompt. | |
353 | * | |
354 | * The return value is the number of visible characters on the last line | |
355 | * of the (possibly multi-line) prompt. | |
356 | */ | |
357 | int | |
358 | rl_expand_prompt (prompt) | |
359 | char *prompt; | |
360 | { | |
361 | char *p, *t; | |
362 | int c; | |
363 | ||
364 | /* Clear out any saved values. */ | |
28ef6c31 JA |
365 | FREE (local_prompt); |
366 | FREE (local_prompt_prefix); | |
367 | ||
726f6388 | 368 | local_prompt = local_prompt_prefix = (char *)0; |
0628567a | 369 | local_prompt_len = 0; |
95732b49 JA |
370 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
371 | prompt_visible_length = prompt_physical_chars = 0; | |
726f6388 | 372 | |
ccc6cda3 | 373 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
374 | return (0); |
375 | ||
376 | p = strrchr (prompt, '\n'); | |
377 | if (!p) | |
378 | { | |
28ef6c31 JA |
379 | /* The prompt is only one logical line, though it might wrap. */ |
380 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
381 | &prompt_last_invisible, | |
b80f6443 JA |
382 | &prompt_invis_chars_first_line, |
383 | &prompt_physical_chars); | |
726f6388 | 384 | local_prompt_prefix = (char *)0; |
0628567a | 385 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 386 | return (prompt_visible_length); |
726f6388 JA |
387 | } |
388 | else | |
389 | { | |
390 | /* The prompt spans multiple lines. */ | |
391 | t = ++p; | |
28ef6c31 JA |
392 | local_prompt = expand_prompt (p, &prompt_visible_length, |
393 | &prompt_last_invisible, | |
b80f6443 | 394 | (int *)NULL, |
eb873671 | 395 | &prompt_physical_chars); |
726f6388 JA |
396 | c = *t; *t = '\0'; |
397 | /* The portion of the prompt string up to and including the | |
398 | final newline is now null-terminated. */ | |
28ef6c31 JA |
399 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
400 | (int *)NULL, | |
b80f6443 | 401 | &prompt_invis_chars_first_line, |
eb873671 | 402 | (int *)NULL); |
726f6388 | 403 | *t = c; |
0628567a | 404 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 405 | return (prompt_prefix_length); |
726f6388 JA |
406 | } |
407 | } | |
408 | ||
bb70624e JA |
409 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
410 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
411 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
412 | increased. If the lines have already been allocated, this ensures that | |
413 | they can hold at least MINSIZE characters. */ | |
414 | static void | |
415 | init_line_structures (minsize) | |
416 | int minsize; | |
417 | { | |
418 | register int n; | |
419 | ||
420 | if (invisible_line == 0) /* initialize it */ | |
421 | { | |
422 | if (line_size < minsize) | |
423 | line_size = minsize; | |
f73dda09 JA |
424 | visible_line = (char *)xmalloc (line_size); |
425 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
426 | } |
427 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
428 | { | |
429 | line_size *= 2; | |
430 | if (line_size < minsize) | |
431 | line_size = minsize; | |
f73dda09 JA |
432 | visible_line = (char *)xrealloc (visible_line, line_size); |
433 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
434 | } |
435 | ||
436 | for (n = minsize; n < line_size; n++) | |
437 | { | |
438 | visible_line[n] = 0; | |
439 | invisible_line[n] = 1; | |
440 | } | |
441 | ||
442 | if (vis_lbreaks == 0) | |
443 | { | |
444 | /* should be enough. */ | |
445 | inv_lbsize = vis_lbsize = 256; | |
446 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
447 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
7117c2d2 JA |
448 | #if defined (HANDLE_MULTIBYTE) |
449 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
450 | #endif | |
bb70624e JA |
451 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
452 | } | |
453 | } | |
454 | ||
726f6388 JA |
455 | /* Basic redisplay algorithm. */ |
456 | void | |
457 | rl_redisplay () | |
458 | { | |
ccc6cda3 JA |
459 | register int in, out, c, linenum, cursor_linenum; |
460 | register char *line; | |
0628567a | 461 | int inv_botlin, lb_botlin, lb_linenum, o_cpos; |
eb873671 | 462 | int newlines, lpos, temp, modmark, n0, num; |
726f6388 | 463 | char *prompt_this_line; |
7117c2d2 JA |
464 | #if defined (HANDLE_MULTIBYTE) |
465 | wchar_t wc; | |
466 | size_t wc_bytes; | |
467 | int wc_width; | |
468 | mbstate_t ps; | |
469 | int _rl_wrapped_multicolumn = 0; | |
470 | #endif | |
726f6388 JA |
471 | |
472 | if (!readline_echoing_p) | |
473 | return; | |
474 | ||
475 | if (!rl_display_prompt) | |
476 | rl_display_prompt = ""; | |
477 | ||
95732b49 | 478 | if (invisible_line == 0 || vis_lbreaks == 0) |
726f6388 | 479 | { |
bb70624e | 480 | init_line_structures (0); |
726f6388 JA |
481 | rl_on_new_line (); |
482 | } | |
483 | ||
484 | /* Draw the line into the buffer. */ | |
0628567a | 485 | cpos_buffer_position = -1; |
726f6388 | 486 | |
ccc6cda3 JA |
487 | line = invisible_line; |
488 | out = inv_botlin = 0; | |
489 | ||
726f6388 JA |
490 | /* Mark the line as modified or not. We only do this for history |
491 | lines. */ | |
b80f6443 | 492 | modmark = 0; |
726f6388 JA |
493 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
494 | { | |
495 | line[out++] = '*'; | |
496 | line[out] = '\0'; | |
b80f6443 | 497 | modmark = 1; |
726f6388 JA |
498 | } |
499 | ||
500 | /* If someone thought that the redisplay was handled, but the currently | |
501 | visible line has a different modification state than the one about | |
502 | to become visible, then correct the caller's misconception. */ | |
503 | if (visible_line[0] != invisible_line[0]) | |
504 | rl_display_fixed = 0; | |
505 | ||
506 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
507 | one passed to readline()), use the values we have already expanded. | |
508 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
509 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 510 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 | 511 | { |
726f6388 JA |
512 | if (local_prompt_prefix && forced_display) |
513 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
514 | ||
0628567a | 515 | if (local_prompt_len > 0) |
ccc6cda3 | 516 | { |
0628567a | 517 | temp = local_prompt_len + out + 2; |
b72432fd JA |
518 | if (temp >= line_size) |
519 | { | |
520 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
521 | visible_line = (char *)xrealloc (visible_line, line_size); |
522 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 523 | } |
0628567a JA |
524 | strncpy (line + out, local_prompt, local_prompt_len); |
525 | out += local_prompt_len; | |
ccc6cda3 | 526 | } |
726f6388 | 527 | line[out] = '\0'; |
0628567a | 528 | wrap_offset = local_prompt_len - prompt_visible_length; |
726f6388 JA |
529 | } |
530 | else | |
531 | { | |
532 | int pmtlen; | |
533 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
534 | if (!prompt_this_line) | |
535 | prompt_this_line = rl_display_prompt; | |
536 | else | |
537 | { | |
538 | prompt_this_line++; | |
bb70624e | 539 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 540 | if (forced_display) |
ccc6cda3 | 541 | { |
bb70624e | 542 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
543 | /* Make sure we are at column zero even after a newline, |
544 | regardless of the state of terminal output processing. */ | |
bb70624e | 545 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
546 | cr (); |
547 | } | |
726f6388 JA |
548 | } |
549 | ||
b80f6443 | 550 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
551 | temp = pmtlen + out + 2; |
552 | if (temp >= line_size) | |
553 | { | |
554 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
555 | visible_line = (char *)xrealloc (visible_line, line_size); |
556 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 557 | } |
726f6388 JA |
558 | strncpy (line + out, prompt_this_line, pmtlen); |
559 | out += pmtlen; | |
560 | line[out] = '\0'; | |
28ef6c31 | 561 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
562 | } |
563 | ||
bb70624e JA |
564 | #define CHECK_INV_LBREAKS() \ |
565 | do { \ | |
566 | if (newlines >= (inv_lbsize - 2)) \ | |
567 | { \ | |
568 | inv_lbsize *= 2; \ | |
569 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
570 | } \ | |
571 | } while (0) | |
7117c2d2 JA |
572 | |
573 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
574 | #define CHECK_LPOS() \ |
575 | do { \ | |
b72432fd | 576 | lpos++; \ |
28ef6c31 | 577 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 578 | { \ |
bb70624e JA |
579 | if (newlines >= (inv_lbsize - 2)) \ |
580 | { \ | |
581 | inv_lbsize *= 2; \ | |
582 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
7117c2d2 | 583 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
bb70624e | 584 | } \ |
b72432fd | 585 | inv_lbreaks[++newlines] = out; \ |
7117c2d2 | 586 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
b72432fd JA |
587 | lpos = 0; \ |
588 | } \ | |
ccc6cda3 | 589 | } while (0) |
7117c2d2 JA |
590 | #else |
591 | #define CHECK_LPOS() \ | |
592 | do { \ | |
593 | lpos++; \ | |
594 | if (lpos >= _rl_screenwidth) \ | |
595 | { \ | |
596 | if (newlines >= (inv_lbsize - 2)) \ | |
597 | { \ | |
598 | inv_lbsize *= 2; \ | |
599 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
600 | } \ | |
601 | inv_lbreaks[++newlines] = out; \ | |
602 | lpos = 0; \ | |
603 | } \ | |
604 | } while (0) | |
605 | #endif | |
ccc6cda3 JA |
606 | |
607 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
608 | inv_lbreaks[newlines = 0] = 0; | |
b80f6443 | 609 | #if 0 |
d166f048 | 610 | lpos = out - wrap_offset; |
b80f6443 JA |
611 | #else |
612 | lpos = prompt_physical_chars + modmark; | |
613 | #endif | |
614 | ||
7117c2d2 JA |
615 | #if defined (HANDLE_MULTIBYTE) |
616 | memset (_rl_wrapped_line, 0, vis_lbsize); | |
eb873671 | 617 | num = 0; |
7117c2d2 | 618 | #endif |
d166f048 | 619 | |
28ef6c31 JA |
620 | /* prompt_invis_chars_first_line is the number of invisible characters in |
621 | the first physical line of the prompt. | |
622 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
623 | chars on the second line. */ | |
624 | ||
625 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 626 | contents of the command line? */ |
28ef6c31 | 627 | while (lpos >= _rl_screenwidth) |
d166f048 | 628 | { |
0628567a | 629 | int z; |
28ef6c31 JA |
630 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
631 | invisible characters that is longer than the screen width. The | |
632 | prompt_invis_chars_first_line variable could be made into an array | |
633 | saying how many invisible characters there are per line, but that's | |
634 | probably too much work for the benefit gained. How many people have | |
b80f6443 JA |
635 | prompts that exceed two physical lines? |
636 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
eb873671 | 637 | #if defined (HANDLE_MULTIBYTE) |
0628567a | 638 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
eb873671 | 639 | { |
0628567a JA |
640 | n0 = num; |
641 | temp = local_prompt_len; | |
642 | while (num < temp) | |
eb873671 | 643 | { |
0628567a JA |
644 | z = _rl_col_width (local_prompt, n0, num); |
645 | if (z > _rl_screenwidth) | |
646 | { | |
647 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
648 | break; | |
649 | } | |
650 | else if (z == _rl_screenwidth) | |
651 | break; | |
652 | num++; | |
eb873671 | 653 | } |
0628567a | 654 | temp = num; |
eb873671 | 655 | } |
0628567a | 656 | else |
eb873671 | 657 | #endif /* !HANDLE_MULTIBYTE */ |
0628567a JA |
658 | temp = ((newlines + 1) * _rl_screenwidth); |
659 | ||
660 | /* Now account for invisible characters in the current line. */ | |
661 | temp += ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line | |
662 | : ((newlines == 1) ? wrap_offset : 0)) | |
663 | : ((newlines == 0) ? wrap_offset :0)); | |
b80f6443 | 664 | |
d166f048 | 665 | inv_lbreaks[++newlines] = temp; |
eb873671 | 666 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
667 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
668 | lpos -= _rl_col_width (local_prompt, n0, num); | |
669 | else | |
eb873671 | 670 | #endif |
0628567a | 671 | lpos -= _rl_screenwidth; |
d166f048 | 672 | } |
ccc6cda3 | 673 | |
28ef6c31 JA |
674 | prompt_last_screen_line = newlines; |
675 | ||
676 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
0628567a | 677 | track of where the cursor is (cpos_buffer_position), the number of the line containing |
28ef6c31 JA |
678 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
679 | It maintains an array of line breaks for display (inv_lbreaks). | |
680 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 681 | lb_linenum = 0; |
7117c2d2 JA |
682 | #if defined (HANDLE_MULTIBYTE) |
683 | in = 0; | |
684 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
685 | { | |
686 | memset (&ps, 0, sizeof (mbstate_t)); | |
687 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
688 | } | |
689 | else | |
690 | wc_bytes = 1; | |
691 | while (in < rl_end) | |
692 | #else | |
d166f048 | 693 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 694 | #endif |
726f6388 JA |
695 | { |
696 | c = (unsigned char)rl_line_buffer[in]; | |
697 | ||
7117c2d2 JA |
698 | #if defined (HANDLE_MULTIBYTE) |
699 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
700 | { | |
b80f6443 | 701 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
702 | { |
703 | /* Byte sequence is invalid or shortened. Assume that the | |
704 | first byte represents a character. */ | |
705 | wc_bytes = 1; | |
706 | /* Assume that a character occupies a single column. */ | |
707 | wc_width = 1; | |
708 | memset (&ps, 0, sizeof (mbstate_t)); | |
709 | } | |
b80f6443 | 710 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
711 | break; /* Found '\0' */ |
712 | else | |
713 | { | |
714 | temp = wcwidth (wc); | |
b80f6443 | 715 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
716 | } |
717 | } | |
718 | #endif | |
719 | ||
726f6388 JA |
720 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
721 | { | |
722 | line_size *= 2; | |
f73dda09 JA |
723 | visible_line = (char *)xrealloc (visible_line, line_size); |
724 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
725 | line = invisible_line; |
726 | } | |
727 | ||
728 | if (in == rl_point) | |
ccc6cda3 | 729 | { |
0628567a | 730 | cpos_buffer_position = out; |
ccc6cda3 JA |
731 | lb_linenum = newlines; |
732 | } | |
726f6388 | 733 | |
7117c2d2 JA |
734 | #if defined (HANDLE_MULTIBYTE) |
735 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
736 | #else | |
726f6388 | 737 | if (META_CHAR (c)) |
7117c2d2 | 738 | #endif |
726f6388 JA |
739 | { |
740 | if (_rl_output_meta_chars == 0) | |
741 | { | |
742 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 743 | |
28ef6c31 | 744 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 745 | { |
28ef6c31 | 746 | temp = _rl_screenwidth - lpos; |
bb70624e | 747 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
748 | inv_lbreaks[++newlines] = out + temp; |
749 | lpos = 4 - temp; | |
750 | } | |
751 | else | |
752 | lpos += 4; | |
753 | ||
726f6388 JA |
754 | out += 4; |
755 | } | |
756 | else | |
ccc6cda3 JA |
757 | { |
758 | line[out++] = c; | |
759 | CHECK_LPOS(); | |
760 | } | |
726f6388 JA |
761 | } |
762 | #if defined (DISPLAY_TABS) | |
763 | else if (c == '\t') | |
764 | { | |
28ef6c31 | 765 | register int newout; |
b72432fd JA |
766 | |
767 | #if 0 | |
ccc6cda3 | 768 | newout = (out | (int)7) + 1; |
b72432fd JA |
769 | #else |
770 | newout = out + 8 - lpos % 8; | |
771 | #endif | |
ccc6cda3 | 772 | temp = newout - out; |
28ef6c31 | 773 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
774 | { |
775 | register int temp2; | |
28ef6c31 | 776 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 777 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
778 | inv_lbreaks[++newlines] = out + temp2; |
779 | lpos = temp - temp2; | |
780 | while (out < newout) | |
781 | line[out++] = ' '; | |
782 | } | |
783 | else | |
784 | { | |
785 | while (out < newout) | |
786 | line[out++] = ' '; | |
787 | lpos += temp; | |
788 | } | |
726f6388 JA |
789 | } |
790 | #endif | |
28ef6c31 | 791 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
792 | { |
793 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 794 | CHECK_INV_LBREAKS (); |
b72432fd JA |
795 | inv_lbreaks[++newlines] = out; |
796 | lpos = 0; | |
797 | } | |
ccc6cda3 | 798 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
799 | { |
800 | line[out++] = '^'; | |
ccc6cda3 JA |
801 | CHECK_LPOS(); |
802 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
803 | CHECK_LPOS(); | |
726f6388 | 804 | } |
ccc6cda3 | 805 | else |
726f6388 | 806 | { |
7117c2d2 JA |
807 | #if defined (HANDLE_MULTIBYTE) |
808 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
809 | { | |
810 | register int i; | |
811 | ||
812 | _rl_wrapped_multicolumn = 0; | |
813 | ||
814 | if (_rl_screenwidth < lpos + wc_width) | |
815 | for (i = lpos; i < _rl_screenwidth; i++) | |
816 | { | |
817 | /* The space will be removed in update_line() */ | |
818 | line[out++] = ' '; | |
819 | _rl_wrapped_multicolumn++; | |
820 | CHECK_LPOS(); | |
821 | } | |
822 | if (in == rl_point) | |
823 | { | |
0628567a | 824 | cpos_buffer_position = out; |
7117c2d2 JA |
825 | lb_linenum = newlines; |
826 | } | |
827 | for (i = in; i < in+wc_bytes; i++) | |
828 | line[out++] = rl_line_buffer[i]; | |
829 | for (i = 0; i < wc_width; i++) | |
830 | CHECK_LPOS(); | |
831 | } | |
832 | else | |
833 | { | |
834 | line[out++] = c; | |
835 | CHECK_LPOS(); | |
836 | } | |
837 | #else | |
ccc6cda3 JA |
838 | line[out++] = c; |
839 | CHECK_LPOS(); | |
7117c2d2 JA |
840 | #endif |
841 | } | |
842 | ||
843 | #if defined (HANDLE_MULTIBYTE) | |
844 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
845 | { | |
846 | in += wc_bytes; | |
847 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
726f6388 | 848 | } |
7117c2d2 JA |
849 | else |
850 | in++; | |
851 | #endif | |
852 | ||
726f6388 JA |
853 | } |
854 | line[out] = '\0'; | |
0628567a | 855 | if (cpos_buffer_position < 0) |
ccc6cda3 | 856 | { |
0628567a | 857 | cpos_buffer_position = out; |
ccc6cda3 JA |
858 | lb_linenum = newlines; |
859 | } | |
860 | ||
861 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 862 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
863 | inv_lbreaks[newlines+1] = out; |
864 | cursor_linenum = lb_linenum; | |
726f6388 | 865 | |
0628567a | 866 | /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed. |
28ef6c31 | 867 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
726f6388 JA |
868 | |
869 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
870 | line buffers are really multiple lines, which would wrap every | |
871 | (screenwidth - 1) characters. Go through each in turn, finding | |
872 | the changed region and updating it. The line order is top to bottom. */ | |
873 | ||
874 | /* If we can move the cursor up and down, then use multiple lines, | |
875 | otherwise, let long lines display in a single terminal line, and | |
876 | horizontally scroll it. */ | |
877 | ||
28ef6c31 | 878 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 879 | { |
95732b49 | 880 | int nleft, pos, changed_screen_line, tx; |
726f6388 JA |
881 | |
882 | if (!rl_display_fixed || forced_display) | |
883 | { | |
884 | forced_display = 0; | |
885 | ||
886 | /* If we have more than a screenful of material to display, then | |
887 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 888 | not the first. */ |
28ef6c31 | 889 | if (out >= _rl_screenchars) |
7117c2d2 JA |
890 | { |
891 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
892 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
893 | else | |
894 | out = _rl_screenchars - 1; | |
895 | } | |
726f6388 JA |
896 | |
897 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
898 | second and subsequent lines start at inv_lbreaks[N], offset by |
899 | OFFSET (which has already been calculated above). */ | |
726f6388 JA |
900 | |
901 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
ccc6cda3 JA |
902 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
903 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
904 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 905 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 906 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 JA |
907 | |
908 | /* For each line in the buffer, do the updating display. */ | |
909 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
910 | { | |
0628567a JA |
911 | /* This can lead us astray if we execute a program that changes |
912 | the locale from a non-multibyte to a multibyte one. */ | |
95732b49 JA |
913 | o_cpos = _rl_last_c_pos; |
914 | cpos_adjusted = 0; | |
726f6388 | 915 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
ccc6cda3 | 916 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 | 917 | |
95732b49 JA |
918 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
919 | take invisible characters into account, since _rl_last_c_pos | |
920 | is an absolute cursor position in a multibyte locale. See | |
921 | if compensating here is the right thing, or if we have to | |
922 | change update_line itself. There is one case in which | |
923 | update_line adjusts _rl_last_c_pos itself (so it can pass | |
924 | _rl_move_cursor_relative accurate values); it communicates | |
0628567a JA |
925 | this back by setting cpos_adjusted. If we assume that |
926 | _rl_last_c_pos is correct (an absolute cursor position) each | |
927 | time update_line is called, then we can assume in our | |
928 | calculations that o_cpos does not need to be adjusted by | |
929 | wrap_offset. */ | |
95732b49 JA |
930 | if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
931 | cpos_adjusted == 0 && | |
932 | _rl_last_c_pos != o_cpos && | |
933 | _rl_last_c_pos > wrap_offset && | |
934 | o_cpos < prompt_last_invisible) | |
935 | _rl_last_c_pos -= wrap_offset; | |
936 | ||
726f6388 JA |
937 | /* If this is the line with the prompt, we might need to |
938 | compensate for invisible characters in the new line. Do | |
939 | this only if there is not more than one new line (which | |
940 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
941 | and the new line is shorter than the old. Make sure we are |
942 | at the end of the new line before clearing. */ | |
726f6388 | 943 | if (linenum == 0 && |
ccc6cda3 | 944 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
945 | (wrap_offset > visible_wrap_offset) && |
946 | (_rl_last_c_pos < visible_first_line_len)) | |
947 | { | |
95732b49 JA |
948 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
949 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
950 | else | |
951 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
726f6388 | 952 | if (nleft) |
d166f048 | 953 | _rl_clear_to_eol (nleft); |
726f6388 JA |
954 | } |
955 | ||
956 | /* Since the new first line is now visible, save its length. */ | |
957 | if (linenum == 0) | |
ccc6cda3 | 958 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
959 | } |
960 | ||
961 | /* We may have deleted some lines. If so, clear the left over | |
962 | blank ones at the bottom out. */ | |
963 | if (_rl_vis_botlin > inv_botlin) | |
964 | { | |
965 | char *tt; | |
966 | for (; linenum <= _rl_vis_botlin; linenum++) | |
967 | { | |
968 | tt = VIS_CHARS (linenum); | |
969 | _rl_move_vert (linenum); | |
970 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 971 | _rl_clear_to_eol |
28ef6c31 | 972 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
973 | } |
974 | } | |
975 | _rl_vis_botlin = inv_botlin; | |
976 | ||
726f6388 JA |
977 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
978 | different screen line during this redisplay. */ | |
979 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
980 | if (changed_screen_line) | |
981 | { | |
982 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 983 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
984 | the physical cursor position on the screen stays the same, |
985 | but the buffer position needs to be adjusted to account | |
986 | for invisible characters. */ | |
95732b49 | 987 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
b72432fd | 988 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
989 | } |
990 | ||
991 | /* We have to reprint the prompt if it contains invisible | |
992 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
993 | the characters from the current cursor position. But we |
994 | only need to reprint it if the cursor is before the last | |
995 | invisible character in the prompt string. */ | |
28ef6c31 | 996 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 997 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
0628567a JA |
998 | #if 0 |
999 | _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt) | |
1000 | #else | |
1001 | _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt) | |
1002 | #endif | |
726f6388 | 1003 | { |
bb70624e JA |
1004 | #if defined (__MSDOS__) |
1005 | putc ('\r', rl_outstream); | |
1006 | #else | |
28ef6c31 JA |
1007 | if (_rl_term_cr) |
1008 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 1009 | #endif |
726f6388 | 1010 | _rl_output_some_chars (local_prompt, nleft); |
7117c2d2 | 1011 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
95732b49 | 1012 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft) - wrap_offset; |
7117c2d2 JA |
1013 | else |
1014 | _rl_last_c_pos = nleft; | |
726f6388 JA |
1015 | } |
1016 | ||
1017 | /* Where on that line? And where does that line start | |
1018 | in the buffer? */ | |
ccc6cda3 | 1019 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 | 1020 | /* nleft == number of characters in the line buffer between the |
0628567a JA |
1021 | start of the line and the desired cursor position. */ |
1022 | nleft = cpos_buffer_position - pos; | |
726f6388 | 1023 | |
95732b49 JA |
1024 | /* NLEFT is now a number of characters in a buffer. When in a |
1025 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
1026 | position that doesn't take invisible characters in the prompt | |
1027 | into account. We use a fudge factor to compensate. */ | |
1028 | ||
ccc6cda3 | 1029 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 1030 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 1031 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
1032 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
1033 | { | |
0628567a | 1034 | /* TX == new physical cursor position in multibyte locale. */ |
7117c2d2 | 1035 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
95732b49 | 1036 | tx = _rl_col_width (&visible_line[pos], 0, nleft) - visible_wrap_offset; |
7117c2d2 | 1037 | else |
95732b49 JA |
1038 | tx = nleft; |
1039 | if (_rl_last_c_pos > tx) | |
1040 | { | |
1041 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ | |
1042 | _rl_last_c_pos = tx; | |
1043 | } | |
726f6388 JA |
1044 | } |
1045 | ||
95732b49 JA |
1046 | /* We need to note that in a multibyte locale we are dealing with |
1047 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1048 | point specified by a buffer position (NLEFT) that doesn't take | |
1049 | invisible characters into account. */ | |
7117c2d2 JA |
1050 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1051 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
1052 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
1053 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1054 | } | |
1055 | } | |
1056 | else /* Do horizontal scrolling. */ | |
1057 | { | |
1058 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1059 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1060 | ||
1061 | /* Always at top line. */ | |
1062 | _rl_last_v_pos = 0; | |
1063 | ||
1064 | /* Compute where in the buffer the displayed line should start. This | |
1065 | will be LMARGIN. */ | |
1066 | ||
1067 | /* The number of characters that will be displayed before the cursor. */ | |
0628567a | 1068 | ndisp = cpos_buffer_position - wrap_offset; |
28ef6c31 | 1069 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1070 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 1071 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
0628567a | 1072 | phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 1073 | t = _rl_screenwidth / 3; |
726f6388 JA |
1074 | |
1075 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 1076 | last_lmargin will be > 0. */ |
726f6388 JA |
1077 | |
1078 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
1079 | width, compute the starting offset so that the cursor is about |
1080 | two-thirds of the way across the screen. */ | |
28ef6c31 | 1081 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 | 1082 | { |
0628567a | 1083 | lmargin = cpos_buffer_position - (2 * t); |
726f6388 JA |
1084 | if (lmargin < 0) |
1085 | lmargin = 0; | |
1086 | /* If the left margin would be in the middle of a prompt with | |
1087 | invisible characters, don't display the prompt at all. */ | |
1088 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1089 | lmargin = nleft; | |
1090 | } | |
28ef6c31 | 1091 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1092 | lmargin = 0; |
726f6388 JA |
1093 | else if (phys_c_pos < 1) |
1094 | { | |
1095 | /* If we are moving back towards the beginning of the line and | |
1096 | the last margin is no longer correct, compute a new one. */ | |
0628567a | 1097 | lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */ |
726f6388 JA |
1098 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
1099 | lmargin = nleft; | |
1100 | } | |
1101 | else | |
b72432fd | 1102 | lmargin = last_lmargin; |
726f6388 JA |
1103 | |
1104 | /* If the first character on the screen isn't the first character | |
1105 | in the display line, indicate this with a special character. */ | |
1106 | if (lmargin > 0) | |
1107 | line[lmargin] = '<'; | |
1108 | ||
1109 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1110 | the whole line, indicate that with a special character at the |
1111 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1112 | wrap offset into account. */ | |
28ef6c31 | 1113 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1114 | if (t < out) |
b72432fd | 1115 | line[t - 1] = '>'; |
726f6388 JA |
1116 | |
1117 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
1118 | { | |
1119 | forced_display = 0; | |
1120 | update_line (&visible_line[last_lmargin], | |
1121 | &invisible_line[lmargin], | |
1122 | 0, | |
28ef6c31 JA |
1123 | _rl_screenwidth + visible_wrap_offset, |
1124 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1125 | 0); |
1126 | ||
1127 | /* If the visible new line is shorter than the old, but the number | |
1128 | of invisible characters is greater, and we are at the end of | |
1129 | the new line, we need to clear to eol. */ | |
1130 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1131 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1132 | (_rl_last_c_pos == out) && | |
1133 | t < visible_first_line_len) | |
1134 | { | |
28ef6c31 | 1135 | nleft = _rl_screenwidth - t; |
d166f048 | 1136 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1137 | } |
1138 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1139 | if (visible_first_line_len > _rl_screenwidth) |
1140 | visible_first_line_len = _rl_screenwidth; | |
726f6388 | 1141 | |
0628567a | 1142 | _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]); |
726f6388 JA |
1143 | last_lmargin = lmargin; |
1144 | } | |
1145 | } | |
1146 | fflush (rl_outstream); | |
1147 | ||
1148 | /* Swap visible and non-visible lines. */ | |
1149 | { | |
28ef6c31 | 1150 | char *vtemp = visible_line; |
bb70624e JA |
1151 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
1152 | ||
726f6388 | 1153 | visible_line = invisible_line; |
28ef6c31 | 1154 | invisible_line = vtemp; |
bb70624e | 1155 | |
ccc6cda3 JA |
1156 | vis_lbreaks = inv_lbreaks; |
1157 | inv_lbreaks = itemp; | |
bb70624e JA |
1158 | |
1159 | vis_lbsize = inv_lbsize; | |
1160 | inv_lbsize = ntemp; | |
1161 | ||
726f6388 JA |
1162 | rl_display_fixed = 0; |
1163 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1164 | are not displaying any invisible characters, so set visible_wrap_offset | |
1165 | to 0. */ | |
1166 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1167 | visible_wrap_offset = 0; | |
1168 | else | |
1169 | visible_wrap_offset = wrap_offset; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | /* PWP: update_line() is based on finding the middle difference of each | |
1174 | line on the screen; vis: | |
1175 | ||
1176 | /old first difference | |
1177 | /beginning of line | /old last same /old EOL | |
1178 | v v v v | |
1179 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1180 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1181 | ^ ^ ^ ^ | |
1182 | \beginning of line | \new last same \new end of line | |
1183 | \new first difference | |
1184 | ||
1185 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1186 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1187 | |
1188 | Could be made even smarter, but this works well enough */ | |
1189 | static void | |
1190 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1191 | register char *old, *new; | |
ccc6cda3 | 1192 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1193 | { |
1194 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
1195 | int temp, lendiff, wsatend, od, nd; | |
ccc6cda3 | 1196 | int current_invis_chars; |
7117c2d2 JA |
1197 | int col_lendiff, col_temp; |
1198 | #if defined (HANDLE_MULTIBYTE) | |
1199 | mbstate_t ps_new, ps_old; | |
0628567a | 1200 | int new_offset, old_offset; |
7117c2d2 | 1201 | #endif |
726f6388 JA |
1202 | |
1203 | /* If we're at the right edge of a terminal that supports xn, we're | |
1204 | ready to wrap around, so do so. This fixes problems with knowing | |
1205 | the exact cursor position and cut-and-paste with certain terminal | |
1206 | emulators. In this calculation, TEMP is the physical screen | |
1207 | position of the cursor. */ | |
95732b49 JA |
1208 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1209 | temp = _rl_last_c_pos; | |
1210 | else | |
1211 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
28ef6c31 | 1212 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1213 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1214 | { |
7117c2d2 JA |
1215 | #if defined (HANDLE_MULTIBYTE) |
1216 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1217 | { | |
1218 | wchar_t wc; | |
1219 | mbstate_t ps; | |
1220 | int tempwidth, bytes; | |
1221 | size_t ret; | |
1222 | ||
1223 | /* This fixes only double-column characters, but if the wrapped | |
1224 | character comsumes more than three columns, spaces will be | |
1225 | inserted in the string buffer. */ | |
1226 | if (_rl_wrapped_line[current_line] > 0) | |
1227 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); | |
1228 | ||
1229 | memset (&ps, 0, sizeof (mbstate_t)); | |
1230 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
b80f6443 | 1231 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1232 | { |
1233 | tempwidth = 1; | |
1234 | ret = 1; | |
1235 | } | |
b80f6443 | 1236 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1237 | tempwidth = 0; |
1238 | else | |
1239 | tempwidth = wcwidth (wc); | |
1240 | ||
1241 | if (tempwidth > 0) | |
1242 | { | |
1243 | int count; | |
1244 | bytes = ret; | |
1245 | for (count = 0; count < bytes; count++) | |
1246 | putc (new[count], rl_outstream); | |
1247 | _rl_last_c_pos = tempwidth; | |
1248 | _rl_last_v_pos++; | |
1249 | memset (&ps, 0, sizeof (mbstate_t)); | |
1250 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1251 | if (ret != 0 && bytes != 0) | |
1252 | { | |
b80f6443 | 1253 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1254 | memmove (old+bytes, old+1, strlen (old+1)); |
1255 | else | |
1256 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1257 | memcpy (old, new, bytes); | |
1258 | } | |
1259 | } | |
1260 | else | |
1261 | { | |
1262 | putc (' ', rl_outstream); | |
1263 | _rl_last_c_pos = 1; | |
1264 | _rl_last_v_pos++; | |
1265 | if (old[0] && new[0]) | |
1266 | old[0] = new[0]; | |
1267 | } | |
1268 | } | |
726f6388 | 1269 | else |
7117c2d2 JA |
1270 | #endif |
1271 | { | |
1272 | if (new[0]) | |
1273 | putc (new[0], rl_outstream); | |
1274 | else | |
1275 | putc (' ', rl_outstream); | |
95732b49 | 1276 | _rl_last_c_pos = 1; |
7117c2d2 JA |
1277 | _rl_last_v_pos++; |
1278 | if (old[0] && new[0]) | |
1279 | old[0] = new[0]; | |
1280 | } | |
726f6388 | 1281 | } |
7117c2d2 | 1282 | |
726f6388 JA |
1283 | |
1284 | /* Find first difference. */ | |
7117c2d2 JA |
1285 | #if defined (HANDLE_MULTIBYTE) |
1286 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1287 | { | |
b80f6443 JA |
1288 | /* See if the old line is a subset of the new line, so that the |
1289 | only change is adding characters. */ | |
1290 | temp = (omax < nmax) ? omax : nmax; | |
1291 | if (memcmp (old, new, temp) == 0) | |
7117c2d2 | 1292 | { |
b80f6443 JA |
1293 | ofd = old + temp; |
1294 | nfd = new + temp; | |
1295 | } | |
1296 | else | |
1297 | { | |
1298 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1299 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1300 | ||
1301 | if (omax == nmax && STREQN (new, old, omax)) | |
1302 | { | |
1303 | ofd = old + omax; | |
1304 | nfd = new + nmax; | |
1305 | } | |
1306 | else | |
1307 | { | |
1308 | new_offset = old_offset = 0; | |
1309 | for (ofd = old, nfd = new; | |
1310 | (ofd - old < omax) && *ofd && | |
1311 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1312 | { | |
1313 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1314 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1315 | ofd = old + old_offset; | |
1316 | nfd = new + new_offset; | |
1317 | } | |
1318 | } | |
7117c2d2 JA |
1319 | } |
1320 | } | |
1321 | else | |
1322 | #endif | |
726f6388 JA |
1323 | for (ofd = old, nfd = new; |
1324 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1325 | ofd++, nfd++) | |
1326 | ; | |
1327 | ||
1328 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1329 | of the distance between ne and new and oe and old, respectively, to | |
1330 | move a subtraction out of each loop. */ | |
1331 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1332 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1333 | ||
1334 | /* If no difference, continue to next line. */ | |
1335 | if (ofd == oe && nfd == ne) | |
1336 | return; | |
1337 | ||
1338 | wsatend = 1; /* flag for trailing whitespace */ | |
7117c2d2 JA |
1339 | |
1340 | #if defined (HANDLE_MULTIBYTE) | |
1341 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1342 | { | |
1343 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1344 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1345 | while ((ols > ofd) && (nls > nfd)) | |
1346 | { | |
1347 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1348 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1349 | ||
b80f6443 JA |
1350 | #if 0 |
1351 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1352 | _rl_adjust_point (old, ols - old, &ps_old); |
1353 | _rl_adjust_point (new, nls - new, &ps_new); | |
b80f6443 | 1354 | #endif |
7117c2d2 JA |
1355 | |
1356 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1357 | break; | |
1358 | ||
1359 | if (*ols == ' ') | |
1360 | wsatend = 0; | |
1361 | ||
1362 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1363 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1364 | } | |
1365 | } | |
1366 | else | |
1367 | { | |
1368 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1369 | ols = oe - 1; /* find last same */ |
1370 | nls = ne - 1; | |
1371 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1372 | { | |
1373 | if (*ols != ' ') | |
1374 | wsatend = 0; | |
1375 | ols--; | |
1376 | nls--; | |
1377 | } | |
7117c2d2 JA |
1378 | #if defined (HANDLE_MULTIBYTE) |
1379 | } | |
1380 | #endif | |
726f6388 JA |
1381 | |
1382 | if (wsatend) | |
1383 | { | |
1384 | ols = oe; | |
1385 | nls = ne; | |
1386 | } | |
7117c2d2 JA |
1387 | #if defined (HANDLE_MULTIBYTE) |
1388 | /* This may not work for stateful encoding, but who cares? To handle | |
1389 | stateful encoding properly, we have to scan each string from the | |
1390 | beginning and compare. */ | |
1391 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1392 | #else | |
726f6388 | 1393 | else if (*ols != *nls) |
7117c2d2 | 1394 | #endif |
726f6388 JA |
1395 | { |
1396 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 JA |
1397 | { |
1398 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1399 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1400 | else | |
1401 | ols++; | |
1402 | } | |
726f6388 | 1403 | if (*nls) |
7117c2d2 JA |
1404 | { |
1405 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1406 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1407 | else | |
1408 | nls++; | |
1409 | } | |
726f6388 JA |
1410 | } |
1411 | ||
ccc6cda3 JA |
1412 | /* count of invisible characters in the current invisible line. */ |
1413 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1414 | if (_rl_last_v_pos != current_line) | |
1415 | { | |
1416 | _rl_move_vert (current_line); | |
95732b49 | 1417 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
ccc6cda3 JA |
1418 | _rl_last_c_pos += visible_wrap_offset; |
1419 | } | |
726f6388 JA |
1420 | |
1421 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1422 | prompt string, and the prompt string has not changed, and the current |
1423 | cursor position is before the last invisible character in the prompt, | |
1424 | and the index of the character to move to is past the end of the prompt | |
1425 | string, then redraw the entire prompt string. We can only do this | |
1426 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1427 | |
ccc6cda3 JA |
1428 | This is not an efficiency hack -- there is a problem with redrawing |
1429 | portions of the prompt string if they contain terminal escape | |
1430 | sequences (like drawing the `unbold' sequence without a corresponding | |
1431 | `bold') that manifests itself on certain terminals. */ | |
726f6388 | 1432 | |
0628567a | 1433 | lendiff = local_prompt_len; |
ccc6cda3 | 1434 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 1435 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 | 1436 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
0628567a | 1437 | od >= lendiff && _rl_last_c_pos < PROMPT_ENDING_INDEX) |
726f6388 | 1438 | { |
bb70624e JA |
1439 | #if defined (__MSDOS__) |
1440 | putc ('\r', rl_outstream); | |
1441 | #else | |
28ef6c31 | 1442 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1443 | #endif |
726f6388 | 1444 | _rl_output_some_chars (local_prompt, lendiff); |
7117c2d2 | 1445 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
95732b49 JA |
1446 | { |
1447 | /* We take wrap_offset into account here so we can pass correct | |
1448 | information to _rl_move_cursor_relative. */ | |
1449 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff) - wrap_offset; | |
1450 | cpos_adjusted = 1; | |
1451 | } | |
7117c2d2 JA |
1452 | else |
1453 | _rl_last_c_pos = lendiff; | |
726f6388 JA |
1454 | } |
1455 | ||
0628567a JA |
1456 | /* When this function returns, _rl_last_c_pos is correct, and an absolute |
1457 | cursor postion in multibyte mode, but a buffer index when not in a | |
1458 | multibyte locale. */ | |
ccc6cda3 | 1459 | _rl_move_cursor_relative (od, old); |
0628567a JA |
1460 | #if 1 |
1461 | #if defined (HANDLE_MULTIBYTE) | |
1462 | /* We need to indicate that the cursor position is correct in the presence of | |
1463 | invisible characters in the prompt string. Let's see if setting this when | |
1464 | we make sure we're at the end of the drawn prompt string works. */ | |
1465 | if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 && _rl_last_c_pos == prompt_physical_chars) | |
1466 | cpos_adjusted = 1; | |
1467 | #endif | |
1468 | #endif | |
726f6388 | 1469 | |
7117c2d2 JA |
1470 | /* if (len (new) > len (old)) |
1471 | lendiff == difference in buffer | |
1472 | col_lendiff == difference on screen | |
1473 | When not using multibyte characters, these are equal */ | |
726f6388 | 1474 | lendiff = (nls - nfd) - (ols - ofd); |
7117c2d2 JA |
1475 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1476 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1477 | else | |
1478 | col_lendiff = lendiff; | |
726f6388 | 1479 | |
ccc6cda3 JA |
1480 | /* If we are changing the number of invisible characters in a line, and |
1481 | the spot of first difference is before the end of the invisible chars, | |
1482 | lendiff needs to be adjusted. */ | |
1483 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1484 | current_invis_chars != visible_wrap_offset) | |
7117c2d2 JA |
1485 | { |
1486 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1487 | { | |
1488 | lendiff += visible_wrap_offset - current_invis_chars; | |
1489 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1490 | } | |
1491 | else | |
1492 | { | |
1493 | lendiff += visible_wrap_offset - current_invis_chars; | |
1494 | col_lendiff = lendiff; | |
1495 | } | |
1496 | } | |
ccc6cda3 | 1497 | |
726f6388 JA |
1498 | /* Insert (diff (len (old), len (new)) ch. */ |
1499 | temp = ne - nfd; | |
7117c2d2 JA |
1500 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1501 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1502 | else | |
1503 | col_temp = temp; | |
1504 | ||
1505 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
726f6388 JA |
1506 | { |
1507 | /* Non-zero if we're increasing the number of lines. */ | |
1508 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1509 | /* Sometimes it is cheaper to print the characters rather than | |
1510 | use the terminal's capabilities. If we're growing the number | |
1511 | of lines, make sure we actually cause the new line to wrap | |
1512 | around on auto-wrapping terminals. */ | |
7117c2d2 | 1513 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1514 | { |
28ef6c31 | 1515 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1516 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1517 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 JA |
1518 | invisible characters. We need to just draw them. */ |
1519 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
28ef6c31 | 1520 | lendiff <= prompt_visible_length || !current_invis_chars)) |
726f6388 | 1521 | { |
7117c2d2 JA |
1522 | insert_some_chars (nfd, lendiff, col_lendiff); |
1523 | _rl_last_c_pos += col_lendiff; | |
726f6388 | 1524 | } |
95732b49 | 1525 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
726f6388 JA |
1526 | { |
1527 | /* At the end of a line the characters do not have to | |
1528 | be "inserted". They can just be placed on the screen. */ | |
ccc6cda3 | 1529 | /* However, this screws up the rest of this block, which |
b72432fd | 1530 | assumes you've done the insert because you can. */ |
726f6388 | 1531 | _rl_output_some_chars (nfd, lendiff); |
7117c2d2 | 1532 | _rl_last_c_pos += col_lendiff; |
726f6388 | 1533 | } |
ccc6cda3 JA |
1534 | else |
1535 | { | |
1536 | /* We have horizontal scrolling and we are not inserting at | |
1537 | the end. We have invisible characters in this line. This | |
1538 | is a dumb update. */ | |
1539 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1540 | _rl_last_c_pos += col_temp; |
ccc6cda3 JA |
1541 | return; |
1542 | } | |
726f6388 JA |
1543 | /* Copy (new) chars to screen from first diff to last match. */ |
1544 | temp = nls - nfd; | |
1545 | if ((temp - lendiff) > 0) | |
1546 | { | |
1547 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
b80f6443 JA |
1548 | #if 1 |
1549 | /* XXX -- this bears closer inspection. Fixes a redisplay bug | |
1550 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1551 | multibyte characters and prompt strings with invisible | |
1552 | characters, but was previously disabled. */ | |
7117c2d2 | 1553 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); |
b80f6443 JA |
1554 | #else |
1555 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff); | |
7117c2d2 | 1556 | #endif |
726f6388 JA |
1557 | } |
1558 | } | |
1559 | else | |
1560 | { | |
1561 | /* cannot insert chars, write to EOL */ | |
1562 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1563 | _rl_last_c_pos += col_temp; |
95732b49 JA |
1564 | /* If we're in a multibyte locale and were before the last invisible |
1565 | char in the current line (which implies we just output some invisible | |
1566 | characters) we need to adjust _rl_last_c_pos, since it represents | |
1567 | a physical character position. */ | |
726f6388 JA |
1568 | } |
1569 | } | |
1570 | else /* Delete characters from line. */ | |
1571 | { | |
1572 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1573 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1574 | { |
1575 | /* If all we're doing is erasing the invisible characters in the | |
1576 | prompt string, don't bother. It screws up the assumptions | |
1577 | about what's on the screen. */ | |
1578 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1579 | -lendiff == visible_wrap_offset) | |
7117c2d2 | 1580 | col_lendiff = 0; |
726f6388 | 1581 | |
7117c2d2 JA |
1582 | if (col_lendiff) |
1583 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 JA |
1584 | |
1585 | /* Copy (new) chars to screen from first diff to last match */ | |
1586 | temp = nls - nfd; | |
1587 | if (temp > 0) | |
1588 | { | |
1589 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1590 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp);; |
726f6388 JA |
1591 | } |
1592 | } | |
1593 | /* Otherwise, print over the existing material. */ | |
1594 | else | |
1595 | { | |
1596 | if (temp > 0) | |
1597 | { | |
1598 | _rl_output_some_chars (nfd, temp); | |
95732b49 | 1599 | _rl_last_c_pos += col_temp; /* XXX */ |
726f6388 JA |
1600 | } |
1601 | lendiff = (oe - old) - (ne - new); | |
7117c2d2 JA |
1602 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1603 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1604 | else | |
1605 | col_lendiff = lendiff; | |
1606 | ||
1607 | if (col_lendiff) | |
b72432fd JA |
1608 | { |
1609 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 1610 | space_to_eol (col_lendiff); |
b72432fd | 1611 | else |
7117c2d2 | 1612 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 1613 | } |
726f6388 JA |
1614 | } |
1615 | } | |
1616 | } | |
1617 | ||
1618 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1619 | int |
726f6388 JA |
1620 | rl_on_new_line () |
1621 | { | |
1622 | if (visible_line) | |
1623 | visible_line[0] = '\0'; | |
1624 | ||
1625 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1626 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1627 | if (vis_lbreaks) |
1628 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1629 | visible_wrap_offset = 0; | |
726f6388 JA |
1630 | return 0; |
1631 | } | |
1632 | ||
bb70624e JA |
1633 | /* Tell the update routines that we have moved onto a new line with the |
1634 | prompt already displayed. Code originally from the version of readline | |
b80f6443 JA |
1635 | distributed with CLISP. rl_expand_prompt must have already been called |
1636 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
1637 | int |
1638 | rl_on_new_line_with_prompt () | |
1639 | { | |
1640 | int prompt_size, i, l, real_screenwidth, newlines; | |
b80f6443 | 1641 | char *prompt_last_line, *lprompt; |
bb70624e JA |
1642 | |
1643 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1644 | the already-displayed prompt. */ | |
1645 | prompt_size = strlen (rl_prompt) + 1; | |
1646 | init_line_structures (prompt_size); | |
1647 | ||
1648 | /* Make sure the line structures hold the already-displayed prompt for | |
1649 | redisplay. */ | |
b80f6443 JA |
1650 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1651 | strcpy (visible_line, lprompt); | |
1652 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
1653 | |
1654 | /* If the prompt contains newlines, take the last tail. */ | |
1655 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1656 | if (!prompt_last_line) | |
1657 | prompt_last_line = rl_prompt; | |
1658 | ||
1659 | l = strlen (prompt_last_line); | |
7117c2d2 | 1660 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
95732b49 | 1661 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); /* XXX */ |
7117c2d2 JA |
1662 | else |
1663 | _rl_last_c_pos = l; | |
bb70624e JA |
1664 | |
1665 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1666 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1667 | one less, see terminal.c. */ | |
28ef6c31 | 1668 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1669 | _rl_last_v_pos = l / real_screenwidth; |
1670 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1671 | whether the cursor is at the end of the last line, or already at the | |
1672 | beginning of the next line. Output a newline just to be safe. */ | |
1673 | if (l > 0 && (l % real_screenwidth) == 0) | |
1674 | _rl_output_some_chars ("\n", 1); | |
1675 | last_lmargin = 0; | |
1676 | ||
1677 | newlines = 0; i = 0; | |
1678 | while (i <= l) | |
1679 | { | |
1680 | _rl_vis_botlin = newlines; | |
1681 | vis_lbreaks[newlines++] = i; | |
1682 | i += real_screenwidth; | |
1683 | } | |
1684 | vis_lbreaks[newlines] = l; | |
1685 | visible_wrap_offset = 0; | |
1686 | ||
b80f6443 JA |
1687 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1688 | ||
bb70624e JA |
1689 | return 0; |
1690 | } | |
1691 | ||
726f6388 | 1692 | /* Actually update the display, period. */ |
ccc6cda3 | 1693 | int |
726f6388 JA |
1694 | rl_forced_update_display () |
1695 | { | |
0628567a JA |
1696 | register char *temp; |
1697 | ||
726f6388 JA |
1698 | if (visible_line) |
1699 | { | |
0628567a | 1700 | temp = visible_line; |
ccc6cda3 | 1701 | while (*temp) |
b72432fd | 1702 | *temp++ = '\0'; |
726f6388 JA |
1703 | } |
1704 | rl_on_new_line (); | |
1705 | forced_display++; | |
ccc6cda3 | 1706 | (*rl_redisplay_function) (); |
726f6388 JA |
1707 | return 0; |
1708 | } | |
1709 | ||
1710 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
95732b49 JA |
1711 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
1712 | buffer index.) | |
726f6388 JA |
1713 | DATA is the contents of the screen line of interest; i.e., where |
1714 | the movement is being done. */ | |
1715 | void | |
1716 | _rl_move_cursor_relative (new, data) | |
1717 | int new; | |
28ef6c31 | 1718 | const char *data; |
726f6388 JA |
1719 | { |
1720 | register int i; | |
95732b49 JA |
1721 | int woff; /* number of invisible chars on current line */ |
1722 | int cpos, dpos; /* current and desired cursor positions */ | |
726f6388 | 1723 | |
95732b49 JA |
1724 | woff = W_OFFSET (_rl_last_v_pos, wrap_offset); |
1725 | cpos = _rl_last_c_pos; | |
7117c2d2 JA |
1726 | #if defined (HANDLE_MULTIBYTE) |
1727 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1728 | a multibyte string, but _rl_last_c_pos is the display position. In | |
b80f6443 | 1729 | this case, NEW's display position is not obvious and must be |
95732b49 JA |
1730 | calculated. We need to account for invisible characters in this line, |
1731 | as long as we are past them and they are counted by _rl_col_width. */ | |
1732 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
b80f6443 | 1733 | { |
95732b49 | 1734 | dpos = _rl_col_width (data, 0, new); |
0628567a JA |
1735 | if (dpos > prompt_last_invisible) /* XXX - don't use woff here */ |
1736 | { | |
1737 | dpos -= woff; | |
1738 | /* Since this will be assigned to _rl_last_c_pos at the end (more | |
1739 | precisely, _rl_last_c_pos == dpos when this function returns), | |
1740 | let the caller know. */ | |
1741 | cpos_adjusted = 1; | |
1742 | } | |
b80f6443 | 1743 | } |
95732b49 | 1744 | else |
7117c2d2 | 1745 | #endif |
95732b49 JA |
1746 | dpos = new; |
1747 | ||
1748 | /* If we don't have to do anything, then return. */ | |
1749 | if (cpos == dpos) | |
1750 | return; | |
726f6388 JA |
1751 | |
1752 | /* It may be faster to output a CR, and then move forwards instead | |
1753 | of moving backwards. */ | |
1754 | /* i == current physical cursor position. */ | |
95732b49 JA |
1755 | #if defined (HANDLE_MULTIBYTE) |
1756 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1757 | i = _rl_last_c_pos; | |
1758 | else | |
1759 | #endif | |
1760 | i = _rl_last_c_pos - woff; | |
0628567a | 1761 | if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) || |
28ef6c31 | 1762 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
1763 | { |
1764 | #if defined (__MSDOS__) | |
1765 | putc ('\r', rl_outstream); | |
1766 | #else | |
28ef6c31 | 1767 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 | 1768 | #endif /* !__MSDOS__ */ |
95732b49 | 1769 | cpos = _rl_last_c_pos = 0; |
726f6388 JA |
1770 | } |
1771 | ||
95732b49 | 1772 | if (cpos < dpos) |
726f6388 JA |
1773 | { |
1774 | /* Move the cursor forward. We do it by printing the command | |
1775 | to move the cursor forward if there is one, else print that | |
1776 | portion of the output buffer again. Which is cheaper? */ | |
1777 | ||
1778 | /* The above comment is left here for posterity. It is faster | |
1779 | to print one character (non-control) than to print a control | |
1780 | sequence telling the terminal to move forward one character. | |
1781 | That kind of control is for people who don't know what the | |
1782 | data is underneath the cursor. */ | |
0628567a JA |
1783 | |
1784 | /* However, we need a handle on where the current display position is | |
1785 | in the buffer for the immediately preceding comment to be true. | |
1786 | In multibyte locales, we don't currently have that info available. | |
1787 | Without it, we don't know where the data we have to display begins | |
1788 | in the buffer and we have to go back to the beginning of the screen | |
1789 | line. In this case, we can use the terminal sequence to move forward | |
1790 | if it's available. */ | |
7117c2d2 JA |
1791 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1792 | { | |
0628567a JA |
1793 | if (_rl_term_forward_char) |
1794 | { | |
1795 | for (i = cpos; i < dpos; i++) | |
1796 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1797 | } | |
1798 | else | |
1799 | { | |
1800 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1801 | for (i = 0; i < new; i++) | |
1802 | putc (data[i], rl_outstream); | |
1803 | } | |
7117c2d2 | 1804 | } |
726f6388 | 1805 | else |
95732b49 | 1806 | for (i = cpos; i < new; i++) |
726f6388 | 1807 | putc (data[i], rl_outstream); |
726f6388 | 1808 | } |
95732b49 | 1809 | |
7117c2d2 JA |
1810 | #if defined (HANDLE_MULTIBYTE) |
1811 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1812 | The byte length of the string is probably bigger than the column width | |
1813 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1814 | display point is less than _rl_last_c_pos. */ | |
7117c2d2 | 1815 | #endif |
95732b49 JA |
1816 | else if (cpos > dpos) |
1817 | _rl_backspace (cpos - dpos); | |
7117c2d2 | 1818 | |
95732b49 | 1819 | _rl_last_c_pos = dpos; |
726f6388 JA |
1820 | } |
1821 | ||
1822 | /* PWP: move the cursor up or down. */ | |
1823 | void | |
1824 | _rl_move_vert (to) | |
1825 | int to; | |
1826 | { | |
1827 | register int delta, i; | |
1828 | ||
28ef6c31 | 1829 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
1830 | return; |
1831 | ||
726f6388 JA |
1832 | if ((delta = to - _rl_last_v_pos) > 0) |
1833 | { | |
1834 | for (i = 0; i < delta; i++) | |
1835 | putc ('\n', rl_outstream); | |
bb70624e JA |
1836 | #if defined (__MSDOS__) |
1837 | putc ('\r', rl_outstream); | |
1838 | #else | |
28ef6c31 | 1839 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1840 | #endif |
726f6388 JA |
1841 | _rl_last_c_pos = 0; |
1842 | } | |
1843 | else | |
1844 | { /* delta < 0 */ | |
28ef6c31 | 1845 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 1846 | for (i = 0; i < -delta; i++) |
28ef6c31 | 1847 | tputs (_rl_term_up, 1, _rl_output_character_function); |
726f6388 | 1848 | } |
bb70624e | 1849 | |
726f6388 JA |
1850 | _rl_last_v_pos = to; /* Now TO is here */ |
1851 | } | |
1852 | ||
1853 | /* Physically print C on rl_outstream. This is for functions which know | |
1854 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 1855 | int |
726f6388 JA |
1856 | rl_show_char (c) |
1857 | int c; | |
1858 | { | |
1859 | int n = 1; | |
1860 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1861 | { | |
1862 | fprintf (rl_outstream, "M-"); | |
1863 | n += 2; | |
1864 | c = UNMETA (c); | |
1865 | } | |
1866 | ||
1867 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 1868 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 1869 | #else |
ccc6cda3 | 1870 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
1871 | #endif /* !DISPLAY_TABS */ |
1872 | { | |
1873 | fprintf (rl_outstream, "C-"); | |
1874 | n += 2; | |
ccc6cda3 | 1875 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
1876 | } |
1877 | ||
1878 | putc (c, rl_outstream); | |
1879 | fflush (rl_outstream); | |
1880 | return n; | |
1881 | } | |
1882 | ||
1883 | int | |
1884 | rl_character_len (c, pos) | |
1885 | register int c, pos; | |
1886 | { | |
1887 | unsigned char uc; | |
1888 | ||
1889 | uc = (unsigned char)c; | |
1890 | ||
1891 | if (META_CHAR (uc)) | |
1892 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1893 | ||
1894 | if (uc == '\t') | |
1895 | { | |
1896 | #if defined (DISPLAY_TABS) | |
1897 | return (((pos | 7) + 1) - pos); | |
1898 | #else | |
1899 | return (2); | |
1900 | #endif /* !DISPLAY_TABS */ | |
1901 | } | |
1902 | ||
ccc6cda3 JA |
1903 | if (CTRL_CHAR (c) || c == RUBOUT) |
1904 | return (2); | |
1905 | ||
f73dda09 | 1906 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 | 1907 | } |
726f6388 JA |
1908 | /* How to print things in the "echo-area". The prompt is treated as a |
1909 | mini-modeline. */ | |
95732b49 | 1910 | static int msg_saved_prompt = 0; |
726f6388 | 1911 | |
ccc6cda3 JA |
1912 | #if defined (USE_VARARGS) |
1913 | int | |
1914 | #if defined (PREFER_STDARG) | |
1915 | rl_message (const char *format, ...) | |
1916 | #else | |
726f6388 JA |
1917 | rl_message (va_alist) |
1918 | va_dcl | |
ccc6cda3 | 1919 | #endif |
726f6388 | 1920 | { |
726f6388 | 1921 | va_list args; |
ccc6cda3 JA |
1922 | #if defined (PREFER_VARARGS) |
1923 | char *format; | |
1924 | #endif | |
726f6388 | 1925 | |
ccc6cda3 JA |
1926 | #if defined (PREFER_STDARG) |
1927 | va_start (args, format); | |
1928 | #else | |
726f6388 JA |
1929 | va_start (args); |
1930 | format = va_arg (args, char *); | |
ccc6cda3 JA |
1931 | #endif |
1932 | ||
f73dda09 JA |
1933 | #if defined (HAVE_VSNPRINTF) |
1934 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
1935 | #else | |
726f6388 | 1936 | vsprintf (msg_buf, format, args); |
f73dda09 JA |
1937 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1938 | #endif | |
726f6388 JA |
1939 | va_end (args); |
1940 | ||
95732b49 JA |
1941 | if (saved_local_prompt == 0) |
1942 | { | |
1943 | rl_save_prompt (); | |
1944 | msg_saved_prompt = 1; | |
1945 | } | |
726f6388 | 1946 | rl_display_prompt = msg_buf; |
95732b49 JA |
1947 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
1948 | &prompt_last_invisible, | |
1949 | &prompt_invis_chars_first_line, | |
1950 | &prompt_physical_chars); | |
1951 | local_prompt_prefix = (char *)NULL; | |
0628567a | 1952 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 1953 | (*rl_redisplay_function) (); |
95732b49 | 1954 | |
726f6388 JA |
1955 | return 0; |
1956 | } | |
ccc6cda3 JA |
1957 | #else /* !USE_VARARGS */ |
1958 | int | |
726f6388 JA |
1959 | rl_message (format, arg1, arg2) |
1960 | char *format; | |
1961 | { | |
1962 | sprintf (msg_buf, format, arg1, arg2); | |
f73dda09 | 1963 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
95732b49 | 1964 | |
726f6388 | 1965 | rl_display_prompt = msg_buf; |
95732b49 JA |
1966 | if (saved_local_prompt == 0) |
1967 | { | |
1968 | rl_save_prompt (); | |
1969 | msg_saved_prompt = 1; | |
1970 | } | |
1971 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, | |
1972 | &prompt_last_invisible, | |
1973 | &prompt_invis_chars_first_line, | |
1974 | &prompt_physical_chars); | |
1975 | local_prompt_prefix = (char *)NULL; | |
0628567a | 1976 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 1977 | (*rl_redisplay_function) (); |
95732b49 | 1978 | |
726f6388 JA |
1979 | return 0; |
1980 | } | |
ccc6cda3 | 1981 | #endif /* !USE_VARARGS */ |
726f6388 JA |
1982 | |
1983 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 1984 | int |
726f6388 JA |
1985 | rl_clear_message () |
1986 | { | |
1987 | rl_display_prompt = rl_prompt; | |
95732b49 JA |
1988 | if (msg_saved_prompt) |
1989 | { | |
1990 | rl_restore_prompt (); | |
1991 | msg_saved_prompt = 0; | |
1992 | } | |
ccc6cda3 | 1993 | (*rl_redisplay_function) (); |
726f6388 JA |
1994 | return 0; |
1995 | } | |
1996 | ||
ccc6cda3 | 1997 | int |
726f6388 JA |
1998 | rl_reset_line_state () |
1999 | { | |
2000 | rl_on_new_line (); | |
2001 | ||
2002 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
2003 | forced_display = 1; | |
2004 | return 0; | |
2005 | } | |
2006 | ||
ccc6cda3 | 2007 | void |
b72432fd | 2008 | rl_save_prompt () |
ccc6cda3 JA |
2009 | { |
2010 | saved_local_prompt = local_prompt; | |
2011 | saved_local_prefix = local_prompt_prefix; | |
95732b49 | 2012 | saved_prefix_length = prompt_prefix_length; |
0628567a | 2013 | saved_local_length = local_prompt_len; |
28ef6c31 JA |
2014 | saved_last_invisible = prompt_last_invisible; |
2015 | saved_visible_length = prompt_visible_length; | |
b80f6443 JA |
2016 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
2017 | saved_physical_chars = prompt_physical_chars; | |
ccc6cda3 JA |
2018 | |
2019 | local_prompt = local_prompt_prefix = (char *)0; | |
0628567a | 2020 | local_prompt_len = 0; |
95732b49 | 2021 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
b80f6443 | 2022 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
2023 | } |
2024 | ||
2025 | void | |
b72432fd | 2026 | rl_restore_prompt () |
ccc6cda3 | 2027 | { |
28ef6c31 JA |
2028 | FREE (local_prompt); |
2029 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
2030 | |
2031 | local_prompt = saved_local_prompt; | |
2032 | local_prompt_prefix = saved_local_prefix; | |
0628567a | 2033 | local_prompt_len = saved_local_length; |
95732b49 | 2034 | prompt_prefix_length = saved_prefix_length; |
28ef6c31 JA |
2035 | prompt_last_invisible = saved_last_invisible; |
2036 | prompt_visible_length = saved_visible_length; | |
b80f6443 JA |
2037 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
2038 | prompt_physical_chars = saved_physical_chars; | |
95732b49 JA |
2039 | |
2040 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
2041 | saved_local_prompt = saved_local_prefix = (char *)0; | |
0628567a | 2042 | saved_local_length = 0; |
95732b49 JA |
2043 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; |
2044 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
ccc6cda3 JA |
2045 | } |
2046 | ||
2047 | char * | |
2048 | _rl_make_prompt_for_search (pchar) | |
2049 | int pchar; | |
2050 | { | |
2051 | int len; | |
0628567a | 2052 | char *pmt, *p; |
ccc6cda3 | 2053 | |
b72432fd | 2054 | rl_save_prompt (); |
ccc6cda3 | 2055 | |
0628567a JA |
2056 | /* We've saved the prompt, and can do anything with the various prompt |
2057 | strings we need before they're restored. We want the unexpanded | |
2058 | portion of the prompt string after any final newline. */ | |
2059 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; | |
2060 | if (p == 0) | |
ccc6cda3 JA |
2061 | { |
2062 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
f73dda09 | 2063 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 2064 | if (len) |
b72432fd | 2065 | strcpy (pmt, rl_prompt); |
ccc6cda3 JA |
2066 | pmt[len] = pchar; |
2067 | pmt[len+1] = '\0'; | |
2068 | } | |
2069 | else | |
2070 | { | |
0628567a JA |
2071 | p++; |
2072 | len = strlen (p); | |
f73dda09 | 2073 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 2074 | if (len) |
0628567a | 2075 | strcpy (pmt, p); |
ccc6cda3 JA |
2076 | pmt[len] = pchar; |
2077 | pmt[len+1] = '\0'; | |
0628567a | 2078 | } |
b80f6443 | 2079 | |
0628567a | 2080 | /* will be overwritten by expand_prompt, called from rl_message */ |
95732b49 | 2081 | prompt_physical_chars = saved_physical_chars + 1; |
ccc6cda3 JA |
2082 | return pmt; |
2083 | } | |
2084 | ||
726f6388 JA |
2085 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
2086 | void | |
2087 | _rl_erase_at_end_of_line (l) | |
2088 | int l; | |
2089 | { | |
2090 | register int i; | |
2091 | ||
ccc6cda3 | 2092 | _rl_backspace (l); |
726f6388 JA |
2093 | for (i = 0; i < l; i++) |
2094 | putc (' ', rl_outstream); | |
ccc6cda3 | 2095 | _rl_backspace (l); |
726f6388 JA |
2096 | for (i = 0; i < l; i++) |
2097 | visible_line[--_rl_last_c_pos] = '\0'; | |
2098 | rl_display_fixed++; | |
2099 | } | |
2100 | ||
2101 | /* Clear to the end of the line. COUNT is the minimum | |
2102 | number of character spaces to clear, */ | |
d166f048 JA |
2103 | void |
2104 | _rl_clear_to_eol (count) | |
726f6388 JA |
2105 | int count; |
2106 | { | |
28ef6c31 JA |
2107 | if (_rl_term_clreol) |
2108 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d166f048 | 2109 | else if (count) |
726f6388 JA |
2110 | space_to_eol (count); |
2111 | } | |
2112 | ||
2113 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2114 | number of character spaces to clear, */ | |
2115 | static void | |
2116 | space_to_eol (count) | |
2117 | int count; | |
2118 | { | |
2119 | register int i; | |
2120 | ||
2121 | for (i = 0; i < count; i++) | |
2122 | putc (' ', rl_outstream); | |
2123 | ||
2124 | _rl_last_c_pos += count; | |
2125 | } | |
2126 | ||
d166f048 JA |
2127 | void |
2128 | _rl_clear_screen () | |
2129 | { | |
28ef6c31 JA |
2130 | if (_rl_term_clrpag) |
2131 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 2132 | else |
28ef6c31 | 2133 | rl_crlf (); |
d166f048 JA |
2134 | } |
2135 | ||
7117c2d2 | 2136 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 2137 | static void |
7117c2d2 | 2138 | insert_some_chars (string, count, col) |
726f6388 | 2139 | char *string; |
7117c2d2 | 2140 | int count, col; |
726f6388 | 2141 | { |
95732b49 JA |
2142 | #if defined (__MSDOS__) || defined (__MINGW32__) |
2143 | _rl_output_some_chars (string, count); | |
2144 | #else | |
7117c2d2 JA |
2145 | /* DEBUGGING */ |
2146 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2147 | if (count != col) | |
2148 | fprintf(stderr, "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); | |
2149 | ||
726f6388 | 2150 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2151 | if (_rl_term_IC) |
726f6388 | 2152 | { |
ccc6cda3 | 2153 | char *buffer; |
7117c2d2 JA |
2154 | |
2155 | buffer = tgoto (_rl_term_IC, 0, col); | |
726f6388 JA |
2156 | tputs (buffer, 1, _rl_output_character_function); |
2157 | _rl_output_some_chars (string, count); | |
2158 | } | |
2159 | else | |
2160 | { | |
2161 | register int i; | |
2162 | ||
2163 | /* If we have to turn on insert-mode, then do so. */ | |
28ef6c31 JA |
2164 | if (_rl_term_im && *_rl_term_im) |
2165 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
726f6388 JA |
2166 | |
2167 | /* If there is a special command for inserting characters, then | |
2168 | use that first to open up the space. */ | |
28ef6c31 | 2169 | if (_rl_term_ic && *_rl_term_ic) |
726f6388 | 2170 | { |
7117c2d2 | 2171 | for (i = col; i--; ) |
28ef6c31 | 2172 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
726f6388 JA |
2173 | } |
2174 | ||
2175 | /* Print the text. */ | |
2176 | _rl_output_some_chars (string, count); | |
2177 | ||
2178 | /* If there is a string to turn off insert mode, we had best use | |
2179 | it now. */ | |
28ef6c31 JA |
2180 | if (_rl_term_ei && *_rl_term_ei) |
2181 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
726f6388 | 2182 | } |
95732b49 | 2183 | #endif /* __MSDOS__ || __MINGW32__ */ |
726f6388 JA |
2184 | } |
2185 | ||
2186 | /* Delete COUNT characters from the display line. */ | |
2187 | static void | |
2188 | delete_chars (count) | |
2189 | int count; | |
2190 | { | |
28ef6c31 | 2191 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2192 | return; |
2193 | ||
95732b49 | 2194 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
28ef6c31 | 2195 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2196 | { |
ccc6cda3 | 2197 | char *buffer; |
28ef6c31 | 2198 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2199 | tputs (buffer, count, _rl_output_character_function); |
2200 | } | |
2201 | else | |
2202 | { | |
28ef6c31 | 2203 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2204 | while (count--) |
28ef6c31 | 2205 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2206 | } |
95732b49 | 2207 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
726f6388 JA |
2208 | } |
2209 | ||
2210 | void | |
2211 | _rl_update_final () | |
2212 | { | |
2213 | int full_lines; | |
2214 | ||
2215 | full_lines = 0; | |
ccc6cda3 JA |
2216 | /* If the cursor is the only thing on an otherwise-blank last line, |
2217 | compensate so we don't print an extra CRLF. */ | |
2218 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2219 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2220 | { |
2221 | _rl_vis_botlin--; | |
2222 | full_lines = 1; | |
2223 | } | |
2224 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2225 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2226 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2227 | { |
726f6388 | 2228 | char *last_line; |
7117c2d2 | 2229 | |
bb70624e | 2230 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
0628567a JA |
2231 | cpos_buffer_position = -1; /* don't know where we are in buffer */ |
2232 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */ | |
d166f048 | 2233 | _rl_clear_to_eol (0); |
28ef6c31 | 2234 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2235 | } |
2236 | _rl_vis_botlin = 0; | |
28ef6c31 | 2237 | rl_crlf (); |
726f6388 JA |
2238 | fflush (rl_outstream); |
2239 | rl_display_fixed++; | |
2240 | } | |
2241 | ||
2242 | /* Move to the start of the current line. */ | |
2243 | static void | |
2244 | cr () | |
2245 | { | |
28ef6c31 | 2246 | if (_rl_term_cr) |
726f6388 | 2247 | { |
bb70624e JA |
2248 | #if defined (__MSDOS__) |
2249 | putc ('\r', rl_outstream); | |
2250 | #else | |
28ef6c31 | 2251 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2252 | #endif |
726f6388 JA |
2253 | _rl_last_c_pos = 0; |
2254 | } | |
2255 | } | |
2256 | ||
bb70624e JA |
2257 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2258 | terminal escape sequences. Called with the cursor at column 0 of the | |
2259 | line to draw the prompt on. */ | |
2260 | static void | |
2261 | redraw_prompt (t) | |
2262 | char *t; | |
2263 | { | |
95732b49 | 2264 | char *oldp; |
bb70624e | 2265 | |
bb70624e | 2266 | oldp = rl_display_prompt; |
95732b49 | 2267 | rl_save_prompt (); |
bb70624e JA |
2268 | |
2269 | rl_display_prompt = t; | |
28ef6c31 JA |
2270 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2271 | &prompt_last_invisible, | |
b80f6443 JA |
2272 | &prompt_invis_chars_first_line, |
2273 | &prompt_physical_chars); | |
bb70624e | 2274 | local_prompt_prefix = (char *)NULL; |
0628567a | 2275 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
95732b49 | 2276 | |
bb70624e JA |
2277 | rl_forced_update_display (); |
2278 | ||
2279 | rl_display_prompt = oldp; | |
95732b49 | 2280 | rl_restore_prompt(); |
bb70624e JA |
2281 | } |
2282 | ||
726f6388 JA |
2283 | /* Redisplay the current line after a SIGWINCH is received. */ |
2284 | void | |
2285 | _rl_redisplay_after_sigwinch () | |
2286 | { | |
bb70624e | 2287 | char *t; |
726f6388 JA |
2288 | |
2289 | /* Clear the current line and put the cursor at column 0. Make sure | |
2290 | the right thing happens if we have wrapped to a new screen line. */ | |
28ef6c31 | 2291 | if (_rl_term_cr) |
726f6388 | 2292 | { |
bb70624e JA |
2293 | #if defined (__MSDOS__) |
2294 | putc ('\r', rl_outstream); | |
2295 | #else | |
28ef6c31 | 2296 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2297 | #endif |
726f6388 | 2298 | _rl_last_c_pos = 0; |
bb70624e | 2299 | #if defined (__MSDOS__) |
28ef6c31 | 2300 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2301 | putc ('\r', rl_outstream); |
2302 | #else | |
28ef6c31 JA |
2303 | if (_rl_term_clreol) |
2304 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2305 | else |
2306 | { | |
28ef6c31 JA |
2307 | space_to_eol (_rl_screenwidth); |
2308 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2309 | } |
bb70624e | 2310 | #endif |
726f6388 JA |
2311 | if (_rl_last_v_pos > 0) |
2312 | _rl_move_vert (0); | |
2313 | } | |
2314 | else | |
28ef6c31 | 2315 | rl_crlf (); |
726f6388 JA |
2316 | |
2317 | /* Redraw only the last line of a multi-line prompt. */ | |
2318 | t = strrchr (rl_display_prompt, '\n'); | |
2319 | if (t) | |
bb70624e | 2320 | redraw_prompt (++t); |
726f6388 JA |
2321 | else |
2322 | rl_forced_update_display (); | |
2323 | } | |
ccc6cda3 JA |
2324 | |
2325 | void | |
2326 | _rl_clean_up_for_exit () | |
2327 | { | |
2328 | if (readline_echoing_p) | |
2329 | { | |
2330 | _rl_move_vert (_rl_vis_botlin); | |
2331 | _rl_vis_botlin = 0; | |
2332 | fflush (rl_outstream); | |
b72432fd | 2333 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2334 | } |
2335 | } | |
b72432fd JA |
2336 | |
2337 | void | |
2338 | _rl_erase_entire_line () | |
2339 | { | |
2340 | cr (); | |
2341 | _rl_clear_to_eol (0); | |
2342 | cr (); | |
2343 | fflush (rl_outstream); | |
2344 | } | |
bb70624e JA |
2345 | |
2346 | /* return the `current display line' of the cursor -- the number of lines to | |
2347 | move up to get to the first screen line of the current readline line. */ | |
2348 | int | |
2349 | _rl_current_display_line () | |
2350 | { | |
2351 | int ret, nleft; | |
2352 | ||
2353 | /* Find out whether or not there might be invisible characters in the | |
2354 | editing buffer. */ | |
2355 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2356 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2357 | else |
28ef6c31 | 2358 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2359 | |
2360 | if (nleft > 0) | |
28ef6c31 | 2361 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2362 | else |
2363 | ret = 0; | |
2364 | ||
2365 | return ret; | |
2366 | } | |
7117c2d2 JA |
2367 | |
2368 | #if defined (HANDLE_MULTIBYTE) | |
2369 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2370 | In the case of multibyte characters with stateful encoding, we have to | |
2371 | scan from the beginning of the string to take the state into account. */ | |
2372 | static int | |
2373 | _rl_col_width (str, start, end) | |
b80f6443 | 2374 | const char *str; |
7117c2d2 JA |
2375 | int start, end; |
2376 | { | |
2377 | wchar_t wc; | |
0628567a | 2378 | mbstate_t ps; |
7117c2d2 JA |
2379 | int tmp, point, width, max; |
2380 | ||
2381 | if (end <= start) | |
2382 | return 0; | |
2383 | ||
0628567a JA |
2384 | memset (&ps, 0, sizeof (mbstate_t)); |
2385 | ||
7117c2d2 JA |
2386 | point = 0; |
2387 | max = end; | |
2388 | ||
2389 | while (point < start) | |
2390 | { | |
2391 | tmp = mbrlen (str + point, max, &ps); | |
b80f6443 | 2392 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2393 | { |
2394 | /* In this case, the bytes are invalid or too short to compose a | |
2395 | multibyte character, so we assume that the first byte represents | |
2396 | a single character. */ | |
2397 | point++; | |
2398 | max--; | |
2399 | ||
2400 | /* Clear the state of the byte sequence, because in this case the | |
2401 | effect of mbstate is undefined. */ | |
2402 | memset (&ps, 0, sizeof (mbstate_t)); | |
2403 | } | |
b80f6443 JA |
2404 | else if (MB_NULLWCH (tmp)) |
2405 | break; /* Found '\0' */ | |
7117c2d2 JA |
2406 | else |
2407 | { | |
2408 | point += tmp; | |
2409 | max -= tmp; | |
2410 | } | |
2411 | } | |
2412 | ||
2413 | /* If START is not a byte that starts a character, then POINT will be | |
2414 | greater than START. In this case, assume that (POINT - START) gives | |
2415 | a byte count that is the number of columns of difference. */ | |
2416 | width = point - start; | |
2417 | ||
2418 | while (point < end) | |
2419 | { | |
2420 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
b80f6443 | 2421 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2422 | { |
2423 | /* In this case, the bytes are invalid or too short to compose a | |
2424 | multibyte character, so we assume that the first byte represents | |
2425 | a single character. */ | |
2426 | point++; | |
2427 | max--; | |
2428 | ||
2429 | /* and assume that the byte occupies a single column. */ | |
2430 | width++; | |
2431 | ||
2432 | /* Clear the state of the byte sequence, because in this case the | |
2433 | effect of mbstate is undefined. */ | |
2434 | memset (&ps, 0, sizeof (mbstate_t)); | |
2435 | } | |
b80f6443 JA |
2436 | else if (MB_NULLWCH (tmp)) |
2437 | break; /* Found '\0' */ | |
7117c2d2 JA |
2438 | else |
2439 | { | |
2440 | point += tmp; | |
2441 | max -= tmp; | |
2442 | tmp = wcwidth(wc); | |
2443 | width += (tmp >= 0) ? tmp : 1; | |
2444 | } | |
2445 | } | |
2446 | ||
2447 | width += point - end; | |
2448 | ||
2449 | return width; | |
2450 | } | |
2451 | #endif /* HANDLE_MULTIBYTE */ |