]>
Commit | Line | Data |
---|---|---|
726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
73a146be | 3 | /* Copyright (C) 1987-2013 Free Software Foundation, Inc. |
726f6388 | 4 | |
2e4498b3 CR |
5 | This file is part of the GNU Readline Library (Readline), a library |
6 | for reading lines of text with interactive input and history editing. | |
726f6388 | 7 | |
2e4498b3 CR |
8 | Readline is free software: you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation, either version 3 of the License, or | |
726f6388 JA |
11 | (at your option) any later version. |
12 | ||
2e4498b3 CR |
13 | Readline is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
726f6388 JA |
16 | GNU General Public License for more details. |
17 | ||
2e4498b3 CR |
18 | You should have received a copy of the GNU General Public License |
19 | along with Readline. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
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 | ||
af32e54d CR |
44 | #ifdef __MSDOS__ |
45 | # include <pc.h> | |
46 | #endif | |
47 | ||
726f6388 JA |
48 | /* System-specific feature definitions and include files. */ |
49 | #include "rldefs.h" | |
7117c2d2 | 50 | #include "rlmbutil.h" |
726f6388 | 51 | |
ccc6cda3 JA |
52 | /* Termcap library stuff. */ |
53 | #include "tcap.h" | |
54 | ||
726f6388 JA |
55 | /* Some standard library routines. */ |
56 | #include "readline.h" | |
57 | #include "history.h" | |
58 | ||
bb70624e JA |
59 | #include "rlprivate.h" |
60 | #include "xmalloc.h" | |
61 | ||
726f6388 JA |
62 | #if !defined (strchr) && !defined (__STDC__) |
63 | extern char *strchr (), *strrchr (); | |
64 | #endif /* !strchr && !__STDC__ */ | |
65 | ||
f73dda09 JA |
66 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
67 | static void space_to_eol PARAMS((int)); | |
68 | static void delete_chars PARAMS((int)); | |
7117c2d2 | 69 | static void insert_some_chars PARAMS((char *, int, int)); |
73a146be | 70 | static void open_some_spaces PARAMS((int)); |
f73dda09 | 71 | static void cr PARAMS((void)); |
ccc6cda3 | 72 | |
d3ad40de CR |
73 | /* State of visible and invisible lines. */ |
74 | struct line_state | |
75 | { | |
76 | char *line; | |
77 | int *lbreaks; | |
78 | int lbsize; | |
79 | #if defined (HANDLE_MULTIBYTE) | |
80 | int *wrapped_line; | |
81 | int wbsize; | |
82 | #endif | |
83 | }; | |
84 | ||
85 | /* The line display buffers. One is the line currently displayed on | |
86 | the screen. The other is the line about to be displayed. */ | |
87 | static struct line_state line_state_array[2]; | |
88 | static struct line_state *line_state_visible = &line_state_array[0]; | |
89 | static struct line_state *line_state_invisible = &line_state_array[1]; | |
c2a47ea9 | 90 | static int line_structures_initialized = 0; |
d3ad40de CR |
91 | |
92 | /* Backwards-compatible names. */ | |
93 | #define inv_lbreaks (line_state_invisible->lbreaks) | |
94 | #define inv_lbsize (line_state_invisible->lbsize) | |
95 | #define vis_lbreaks (line_state_visible->lbreaks) | |
96 | #define vis_lbsize (line_state_visible->lbsize) | |
97 | ||
98 | #define visible_line (line_state_visible->line) | |
99 | #define invisible_line (line_state_invisible->line) | |
100 | ||
7117c2d2 | 101 | #if defined (HANDLE_MULTIBYTE) |
82a5df63 | 102 | static int _rl_col_width PARAMS((const char *, int, int, int)); |
7117c2d2 | 103 | #else |
82a5df63 | 104 | # define _rl_col_width(l, s, e, f) (((e) <= (s)) ? 0 : (e) - (s)) |
7117c2d2 JA |
105 | #endif |
106 | ||
726f6388 | 107 | /* Heuristic used to decide whether it is faster to move from CUR to NEW |
d3ad40de CR |
108 | by backing up or outputting a carriage return and moving forward. CUR |
109 | and NEW are either both buffer positions or absolute screen positions. */ | |
726f6388 JA |
110 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) |
111 | ||
ac18b312 CR |
112 | /* _rl_last_c_pos is an absolute cursor position in multibyte locales and a |
113 | buffer index in others. This macro is used when deciding whether the | |
114 | current cursor position is in the middle of a prompt string containing | |
d3ad40de | 115 | invisible characters. XXX - might need to take `modmark' into account. */ |
ac18b312 | 116 | #define PROMPT_ENDING_INDEX \ |
2abb7255 | 117 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1) |
ac18b312 CR |
118 | |
119 | ||
726f6388 JA |
120 | /* **************************************************************** */ |
121 | /* */ | |
122 | /* Display stuff */ | |
123 | /* */ | |
124 | /* **************************************************************** */ | |
125 | ||
126 | /* This is the stuff that is hard for me. I never seem to write good | |
127 | display routines in C. Let's see how I do this time. */ | |
128 | ||
129 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
130 | the problems of input lines longer than the screen width. | |
131 | ||
132 | update_line and the code that calls it makes a multiple line, | |
133 | automatically wrapping line update. Careful attention needs | |
134 | to be paid to the vertical position variables. */ | |
135 | ||
136 | /* Keep two buffers; one which reflects the current contents of the | |
137 | screen, and the other to draw what we think the new contents should | |
138 | be. Then compare the buffers, and make whatever changes to the | |
139 | screen itself that we should. Finally, make the buffer that we | |
140 | just drew into be the one which reflects the current contents of the | |
141 | screen, and place the cursor where it belongs. | |
142 | ||
143 | Commands that want to can fix the display themselves, and then let | |
144 | this function know that the display has been fixed by setting the | |
145 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
146 | ||
ccc6cda3 | 147 | /* Application-specific redisplay function. */ |
28ef6c31 | 148 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 149 | |
726f6388 JA |
150 | /* Global variables declared here. */ |
151 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
152 | int rl_display_fixed = 0; | |
153 | ||
ccc6cda3 | 154 | int _rl_suppress_redisplay = 0; |
798a67db | 155 | int _rl_want_redisplay = 0; |
ccc6cda3 | 156 | |
726f6388 JA |
157 | /* The stuff that gets printed out before the actual text of the line. |
158 | This is usually pointing to rl_prompt. */ | |
159 | char *rl_display_prompt = (char *)NULL; | |
160 | ||
161 | /* Pseudo-global variables declared here. */ | |
177d51f7 | 162 | |
726f6388 | 163 | /* The visible cursor position. If you print some text, adjust this. */ |
177d51f7 CR |
164 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
165 | supporting multibyte characters, and an absolute cursor position when | |
166 | in such a locale. This is an artifact of the donated multibyte support. | |
167 | Care must be taken when modifying its value. */ | |
726f6388 JA |
168 | int _rl_last_c_pos = 0; |
169 | int _rl_last_v_pos = 0; | |
170 | ||
5c26afb8 | 171 | static int cpos_adjusted; |
d3ad40de | 172 | static int cpos_buffer_position; |
77b3aacb | 173 | static int displaying_prompt_first_line; |
d3ad40de | 174 | static int prompt_multibyte_chars; |
5c26afb8 | 175 | |
726f6388 JA |
176 | /* Number of lines currently on screen minus 1. */ |
177 | int _rl_vis_botlin = 0; | |
178 | ||
179 | /* Variables used only in this file. */ | |
180 | /* The last left edge of text that was displayed. This is used when | |
181 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 182 | static int last_lmargin; |
726f6388 | 183 | |
726f6388 | 184 | /* A buffer for `modeline' messages. */ |
40647963 CR |
185 | static char *msg_buf = 0; |
186 | static int msg_bufsiz = 0; | |
726f6388 JA |
187 | |
188 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 189 | static int forced_display; |
726f6388 JA |
190 | |
191 | /* Default and initial buffer size. Can grow. */ | |
192 | static int line_size = 1024; | |
193 | ||
28ef6c31 JA |
194 | /* Variables to keep track of the expanded prompt string, which may |
195 | include invisible characters. */ | |
196 | ||
726f6388 | 197 | static char *local_prompt, *local_prompt_prefix; |
d3ad40de | 198 | static int local_prompt_len; |
28ef6c31 | 199 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
200 | |
201 | /* The number of invisible characters in the line currently being | |
202 | displayed on the screen. */ | |
ccc6cda3 JA |
203 | static int visible_wrap_offset; |
204 | ||
28ef6c31 JA |
205 | /* The number of invisible characters in the prompt string. Static so it |
206 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
207 | static int wrap_offset; |
208 | ||
28ef6c31 JA |
209 | /* The index of the last invisible character in the prompt string. */ |
210 | static int prompt_last_invisible; | |
726f6388 JA |
211 | |
212 | /* The length (buffer offset) of the first line of the last (possibly | |
213 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 214 | static int visible_first_line_len; |
726f6388 | 215 | |
28ef6c31 JA |
216 | /* Number of invisible characters on the first physical line of the prompt. |
217 | Only valid when the number of physical characters in the prompt exceeds | |
218 | (or is equal to) _rl_screenwidth. */ | |
219 | static int prompt_invis_chars_first_line; | |
220 | ||
221 | static int prompt_last_screen_line; | |
222 | ||
43cdcad8 CR |
223 | static int prompt_physical_chars; |
224 | ||
d3ad40de CR |
225 | /* set to a non-zero value by rl_redisplay if we are marking modified history |
226 | lines and the current line is so marked. */ | |
227 | static int modmark; | |
228 | ||
6e70dbff CR |
229 | /* Variables to save and restore prompt and display information. */ |
230 | ||
231 | /* These are getting numerous enough that it's time to create a struct. */ | |
232 | ||
233 | static char *saved_local_prompt; | |
234 | static char *saved_local_prefix; | |
235 | static int saved_last_invisible; | |
236 | static int saved_visible_length; | |
237 | static int saved_prefix_length; | |
d3ad40de | 238 | static int saved_local_length; |
6e70dbff CR |
239 | static int saved_invis_chars_first_line; |
240 | static int saved_physical_chars; | |
241 | ||
a7ad477f CR |
242 | /* Return a character indicating the editing mode, for use in the prompt. */ |
243 | static int | |
244 | prompt_modechar () | |
245 | { | |
246 | if (rl_editing_mode == emacs_mode) | |
247 | return '@'; | |
248 | else if (_rl_keymap == vi_insertion_keymap) | |
249 | return '+'; /* vi insert mode */ | |
250 | else | |
251 | return ':'; /* vi command mode */ | |
252 | } | |
253 | ||
726f6388 JA |
254 | /* Expand the prompt string S and return the number of visible |
255 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 256 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
257 | index of the last invisible character in the returned string. NIFLP, |
258 | if non-zero, is a place to store the number of invisible characters in | |
43cdcad8 CR |
259 | the first prompt line. The previous are used as byte counts -- indexes |
260 | into a character buffer. */ | |
726f6388 JA |
261 | |
262 | /* Current implementation: | |
263 | \001 (^A) start non-visible characters | |
264 | \002 (^B) end non-visible characters | |
265 | all characters except \001 and \002 (following a \001) are copied to | |
266 | the returned string; all characters except those between \001 and | |
267 | \002 are assumed to be `visible'. */ | |
268 | ||
269 | static char * | |
43cdcad8 | 270 | expand_prompt (pmt, lp, lip, niflp, vlp) |
726f6388 | 271 | char *pmt; |
43cdcad8 | 272 | int *lp, *lip, *niflp, *vlp; |
726f6388 | 273 | { |
5e4a95c7 | 274 | char *r, *ret, *p, *igstart; |
b954488b | 275 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
726f6388 JA |
276 | |
277 | /* Short-circuit if we can. */ | |
43cdcad8 | 278 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 | 279 | { |
a7ad477f CR |
280 | if (pmt == rl_prompt && _rl_show_mode_in_prompt) |
281 | { | |
282 | l = strlen (pmt); | |
283 | r = (char *)xmalloc (l + 2); | |
284 | r[0] = prompt_modechar (); | |
285 | strcpy (r + 1, pmt); | |
286 | } | |
287 | else | |
288 | r = savestring (pmt); | |
289 | ||
726f6388 JA |
290 | if (lp) |
291 | *lp = strlen (r); | |
43cdcad8 CR |
292 | if (lip) |
293 | *lip = 0; | |
294 | if (niflp) | |
295 | *niflp = 0; | |
296 | if (vlp) | |
297 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
298 | return r; |
299 | } | |
300 | ||
ccc6cda3 | 301 | l = strlen (pmt); |
a7ad477f CR |
302 | r = ret = (char *)xmalloc (l + 2); |
303 | ||
304 | rl = physchars = 0; /* move up here so mode show can set them */ | |
305 | if (pmt == rl_prompt && _rl_show_mode_in_prompt) | |
306 | { | |
307 | *r++ = prompt_modechar (); | |
308 | rl = physchars = 1; | |
309 | } | |
28ef6c31 JA |
310 | |
311 | invfl = 0; /* invisible chars in first line of prompt */ | |
b954488b | 312 | invflset = 0; /* we only want to set invfl once */ |
28ef6c31 | 313 | |
dc8fbaf9 | 314 | igstart = 0; |
a7ad477f | 315 | for (ignoring = last = ninvis = 0, p = pmt; p && *p; p++) |
726f6388 JA |
316 | { |
317 | /* This code strips the invisible character string markers | |
318 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
dc8fbaf9 | 319 | if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */ |
726f6388 | 320 | { |
5e4a95c7 CR |
321 | ignoring = 1; |
322 | igstart = p; | |
726f6388 JA |
323 | continue; |
324 | } | |
325 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
326 | { | |
327 | ignoring = 0; | |
dc8fbaf9 | 328 | if (p != (igstart + 1)) |
1569c106 | 329 | last = r - ret - 1; |
726f6388 JA |
330 | continue; |
331 | } | |
332 | else | |
333 | { | |
43cdcad8 CR |
334 | #if defined (HANDLE_MULTIBYTE) |
335 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
336 | { | |
337 | pind = p - pmt; | |
338 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
339 | l = ind - pind; | |
340 | while (l--) | |
341 | *r++ = *p++; | |
342 | if (!ignoring) | |
37c41ab1 | 343 | { |
d3ad40de CR |
344 | /* rl ends up being assigned to prompt_visible_length, |
345 | which is the number of characters in the buffer that | |
346 | contribute to characters on the screen, which might | |
347 | not be the same as the number of physical characters | |
348 | on the screen in the presence of multibyte characters */ | |
37c41ab1 | 349 | rl += ind - pind; |
82a5df63 | 350 | physchars += _rl_col_width (pmt, pind, ind, 0); |
37c41ab1 | 351 | } |
43cdcad8 CR |
352 | else |
353 | ninvis += ind - pind; | |
354 | p--; /* compensate for later increment */ | |
355 | } | |
28ef6c31 | 356 | else |
43cdcad8 CR |
357 | #endif |
358 | { | |
359 | *r++ = *p; | |
360 | if (!ignoring) | |
37c41ab1 CR |
361 | { |
362 | rl++; /* visible length byte counter */ | |
363 | physchars++; | |
364 | } | |
43cdcad8 CR |
365 | else |
366 | ninvis++; /* invisible chars byte counter */ | |
367 | } | |
368 | ||
b954488b CR |
369 | if (invflset == 0 && rl >= _rl_screenwidth) |
370 | { | |
371 | invfl = ninvis; | |
372 | invflset = 1; | |
373 | } | |
726f6388 JA |
374 | } |
375 | } | |
376 | ||
28ef6c31 JA |
377 | if (rl < _rl_screenwidth) |
378 | invfl = ninvis; | |
379 | ||
726f6388 JA |
380 | *r = '\0'; |
381 | if (lp) | |
382 | *lp = rl; | |
ccc6cda3 JA |
383 | if (lip) |
384 | *lip = last; | |
28ef6c31 JA |
385 | if (niflp) |
386 | *niflp = invfl; | |
43cdcad8 CR |
387 | if (vlp) |
388 | *vlp = physchars; | |
726f6388 JA |
389 | return ret; |
390 | } | |
391 | ||
bb70624e JA |
392 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
393 | PMT and return the rest of PMT. */ | |
394 | char * | |
395 | _rl_strip_prompt (pmt) | |
396 | char *pmt; | |
397 | { | |
398 | char *ret; | |
399 | ||
43cdcad8 | 400 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
401 | return ret; |
402 | } | |
403 | ||
a7ad477f CR |
404 | void |
405 | _rl_reset_prompt () | |
406 | { | |
407 | rl_visible_prompt_length = rl_expand_prompt (rl_prompt); | |
408 | } | |
409 | ||
726f6388 JA |
410 | /* |
411 | * Expand the prompt string into the various display components, if | |
412 | * necessary. | |
413 | * | |
414 | * local_prompt = expanded last line of string in rl_display_prompt | |
415 | * (portion after the final newline) | |
416 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
417 | * expanded via expand_prompt | |
28ef6c31 JA |
418 | * prompt_visible_length = number of visible characters in local_prompt |
419 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
420 | * |
421 | * This function is called once per call to readline(). It may also be | |
422 | * called arbitrarily to expand the primary prompt. | |
423 | * | |
424 | * The return value is the number of visible characters on the last line | |
425 | * of the (possibly multi-line) prompt. | |
426 | */ | |
427 | int | |
428 | rl_expand_prompt (prompt) | |
429 | char *prompt; | |
430 | { | |
431 | char *p, *t; | |
432 | int c; | |
433 | ||
434 | /* Clear out any saved values. */ | |
28ef6c31 JA |
435 | FREE (local_prompt); |
436 | FREE (local_prompt_prefix); | |
437 | ||
726f6388 | 438 | local_prompt = local_prompt_prefix = (char *)0; |
d3ad40de | 439 | local_prompt_len = 0; |
ec2199bd CR |
440 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
441 | prompt_visible_length = prompt_physical_chars = 0; | |
726f6388 | 442 | |
ccc6cda3 | 443 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
444 | return (0); |
445 | ||
446 | p = strrchr (prompt, '\n'); | |
447 | if (!p) | |
448 | { | |
28ef6c31 JA |
449 | /* The prompt is only one logical line, though it might wrap. */ |
450 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
451 | &prompt_last_invisible, | |
43cdcad8 CR |
452 | &prompt_invis_chars_first_line, |
453 | &prompt_physical_chars); | |
726f6388 | 454 | local_prompt_prefix = (char *)0; |
d3ad40de | 455 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 456 | return (prompt_visible_length); |
726f6388 JA |
457 | } |
458 | else | |
459 | { | |
460 | /* The prompt spans multiple lines. */ | |
461 | t = ++p; | |
28ef6c31 JA |
462 | local_prompt = expand_prompt (p, &prompt_visible_length, |
463 | &prompt_last_invisible, | |
70694d2e | 464 | &prompt_invis_chars_first_line, |
e6e3b444 | 465 | &prompt_physical_chars); |
726f6388 JA |
466 | c = *t; *t = '\0'; |
467 | /* The portion of the prompt string up to and including the | |
468 | final newline is now null-terminated. */ | |
28ef6c31 JA |
469 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
470 | (int *)NULL, | |
70694d2e | 471 | (int *)NULL, |
e6e3b444 | 472 | (int *)NULL); |
726f6388 | 473 | *t = c; |
d3ad40de | 474 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 475 | return (prompt_prefix_length); |
726f6388 JA |
476 | } |
477 | } | |
478 | ||
bb70624e JA |
479 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
480 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
481 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
482 | increased. If the lines have already been allocated, this ensures that | |
483 | they can hold at least MINSIZE characters. */ | |
484 | static void | |
485 | init_line_structures (minsize) | |
486 | int minsize; | |
487 | { | |
488 | register int n; | |
489 | ||
490 | if (invisible_line == 0) /* initialize it */ | |
491 | { | |
492 | if (line_size < minsize) | |
493 | line_size = minsize; | |
f73dda09 JA |
494 | visible_line = (char *)xmalloc (line_size); |
495 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
496 | } |
497 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
498 | { | |
499 | line_size *= 2; | |
500 | if (line_size < minsize) | |
501 | line_size = minsize; | |
f73dda09 JA |
502 | visible_line = (char *)xrealloc (visible_line, line_size); |
503 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
504 | } |
505 | ||
506 | for (n = minsize; n < line_size; n++) | |
507 | { | |
508 | visible_line[n] = 0; | |
509 | invisible_line[n] = 1; | |
510 | } | |
511 | ||
512 | if (vis_lbreaks == 0) | |
513 | { | |
514 | /* should be enough. */ | |
515 | inv_lbsize = vis_lbsize = 256; | |
c2a47ea9 | 516 | |
7117c2d2 | 517 | #if defined (HANDLE_MULTIBYTE) |
d3ad40de CR |
518 | line_state_visible->wbsize = vis_lbsize; |
519 | line_state_visible->wrapped_line = (int *)xmalloc (line_state_visible->wbsize * sizeof (int)); | |
520 | ||
521 | line_state_invisible->wbsize = inv_lbsize; | |
522 | line_state_invisible->wrapped_line = (int *)xmalloc (line_state_invisible->wbsize * sizeof (int)); | |
7117c2d2 | 523 | #endif |
c2a47ea9 CR |
524 | |
525 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
526 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
bb70624e JA |
527 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
528 | } | |
c2a47ea9 CR |
529 | |
530 | line_structures_initialized = 1; | |
bb70624e JA |
531 | } |
532 | ||
726f6388 JA |
533 | /* Basic redisplay algorithm. */ |
534 | void | |
535 | rl_redisplay () | |
536 | { | |
ccc6cda3 JA |
537 | register int in, out, c, linenum, cursor_linenum; |
538 | register char *line; | |
d3ad40de | 539 | int inv_botlin, lb_botlin, lb_linenum, o_cpos; |
57a3f689 | 540 | int newlines, lpos, temp, n0, num, prompt_lines_estimate; |
726f6388 | 541 | char *prompt_this_line; |
7117c2d2 JA |
542 | #if defined (HANDLE_MULTIBYTE) |
543 | wchar_t wc; | |
544 | size_t wc_bytes; | |
545 | int wc_width; | |
546 | mbstate_t ps; | |
547 | int _rl_wrapped_multicolumn = 0; | |
548 | #endif | |
726f6388 | 549 | |
6fbe7620 | 550 | if (_rl_echoing_p == 0) |
726f6388 JA |
551 | return; |
552 | ||
d356441f CR |
553 | /* Block keyboard interrupts because this function manipulates global |
554 | data structures. */ | |
555 | _rl_block_sigint (); | |
83c14a20 | 556 | RL_SETSTATE (RL_STATE_REDISPLAYING); |
d356441f | 557 | |
726f6388 JA |
558 | if (!rl_display_prompt) |
559 | rl_display_prompt = ""; | |
560 | ||
c2a47ea9 | 561 | if (line_structures_initialized == 0) |
726f6388 | 562 | { |
bb70624e | 563 | init_line_structures (0); |
726f6388 JA |
564 | rl_on_new_line (); |
565 | } | |
566 | ||
567 | /* Draw the line into the buffer. */ | |
d3ad40de CR |
568 | cpos_buffer_position = -1; |
569 | ||
570 | prompt_multibyte_chars = prompt_visible_length - prompt_physical_chars; | |
6ec48275 | 571 | |
ccc6cda3 JA |
572 | line = invisible_line; |
573 | out = inv_botlin = 0; | |
574 | ||
726f6388 JA |
575 | /* Mark the line as modified or not. We only do this for history |
576 | lines. */ | |
43cdcad8 | 577 | modmark = 0; |
726f6388 JA |
578 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
579 | { | |
580 | line[out++] = '*'; | |
581 | line[out] = '\0'; | |
43cdcad8 | 582 | modmark = 1; |
726f6388 JA |
583 | } |
584 | ||
585 | /* If someone thought that the redisplay was handled, but the currently | |
586 | visible line has a different modification state than the one about | |
587 | to become visible, then correct the caller's misconception. */ | |
588 | if (visible_line[0] != invisible_line[0]) | |
589 | rl_display_fixed = 0; | |
590 | ||
591 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
592 | one passed to readline()), use the values we have already expanded. | |
593 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
594 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 595 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 | 596 | { |
726f6388 JA |
597 | if (local_prompt_prefix && forced_display) |
598 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
599 | ||
d3ad40de | 600 | if (local_prompt_len > 0) |
ccc6cda3 | 601 | { |
d3ad40de | 602 | temp = local_prompt_len + out + 2; |
b72432fd JA |
603 | if (temp >= line_size) |
604 | { | |
605 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
606 | visible_line = (char *)xrealloc (visible_line, line_size); |
607 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 608 | } |
d3ad40de CR |
609 | strncpy (line + out, local_prompt, local_prompt_len); |
610 | out += local_prompt_len; | |
ccc6cda3 | 611 | } |
726f6388 | 612 | line[out] = '\0'; |
d3ad40de | 613 | wrap_offset = local_prompt_len - prompt_visible_length; |
726f6388 JA |
614 | } |
615 | else | |
616 | { | |
617 | int pmtlen; | |
618 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
619 | if (!prompt_this_line) | |
620 | prompt_this_line = rl_display_prompt; | |
621 | else | |
622 | { | |
623 | prompt_this_line++; | |
bb70624e | 624 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 625 | if (forced_display) |
ccc6cda3 | 626 | { |
bb70624e | 627 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
628 | /* Make sure we are at column zero even after a newline, |
629 | regardless of the state of terminal output processing. */ | |
bb70624e | 630 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
631 | cr (); |
632 | } | |
726f6388 JA |
633 | } |
634 | ||
762a763b | 635 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
636 | temp = pmtlen + out + 2; |
637 | if (temp >= line_size) | |
638 | { | |
639 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
640 | visible_line = (char *)xrealloc (visible_line, line_size); |
641 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 642 | } |
726f6388 JA |
643 | strncpy (line + out, prompt_this_line, pmtlen); |
644 | out += pmtlen; | |
645 | line[out] = '\0'; | |
28ef6c31 | 646 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
647 | } |
648 | ||
bb70624e JA |
649 | #define CHECK_INV_LBREAKS() \ |
650 | do { \ | |
651 | if (newlines >= (inv_lbsize - 2)) \ | |
652 | { \ | |
653 | inv_lbsize *= 2; \ | |
654 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
655 | } \ | |
656 | } while (0) | |
7117c2d2 JA |
657 | |
658 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
659 | #define CHECK_LPOS() \ |
660 | do { \ | |
b72432fd | 661 | lpos++; \ |
28ef6c31 | 662 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 663 | { \ |
bb70624e JA |
664 | if (newlines >= (inv_lbsize - 2)) \ |
665 | { \ | |
666 | inv_lbsize *= 2; \ | |
667 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
668 | } \ | |
b72432fd | 669 | inv_lbreaks[++newlines] = out; \ |
d3ad40de CR |
670 | if (newlines >= (line_state_invisible->wbsize - 1)) \ |
671 | { \ | |
672 | line_state_invisible->wbsize *= 2; \ | |
673 | line_state_invisible->wrapped_line = (int *)xrealloc (line_state_invisible->wrapped_line, line_state_invisible->wbsize * sizeof(int)); \ | |
674 | } \ | |
675 | line_state_invisible->wrapped_line[newlines] = _rl_wrapped_multicolumn; \ | |
b72432fd JA |
676 | lpos = 0; \ |
677 | } \ | |
ccc6cda3 | 678 | } while (0) |
7117c2d2 JA |
679 | #else |
680 | #define CHECK_LPOS() \ | |
681 | do { \ | |
682 | lpos++; \ | |
683 | if (lpos >= _rl_screenwidth) \ | |
684 | { \ | |
685 | if (newlines >= (inv_lbsize - 2)) \ | |
686 | { \ | |
687 | inv_lbsize *= 2; \ | |
688 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
689 | } \ | |
690 | inv_lbreaks[++newlines] = out; \ | |
691 | lpos = 0; \ | |
692 | } \ | |
693 | } while (0) | |
694 | #endif | |
ccc6cda3 JA |
695 | |
696 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
697 | inv_lbreaks[newlines = 0] = 0; | |
43cdcad8 | 698 | lpos = prompt_physical_chars + modmark; |
43cdcad8 | 699 | |
7117c2d2 | 700 | #if defined (HANDLE_MULTIBYTE) |
d3ad40de | 701 | memset (line_state_invisible->wrapped_line, 0, line_state_invisible->wbsize * sizeof (int)); |
37c41ab1 | 702 | num = 0; |
7117c2d2 | 703 | #endif |
d166f048 | 704 | |
28ef6c31 JA |
705 | /* prompt_invis_chars_first_line is the number of invisible characters in |
706 | the first physical line of the prompt. | |
707 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
57a3f689 CR |
708 | chars on the second (or, more generally, last) line. */ |
709 | ||
710 | /* This is zero-based, used to set the newlines */ | |
711 | prompt_lines_estimate = lpos / _rl_screenwidth; | |
28ef6c31 JA |
712 | |
713 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 714 | contents of the command line? */ |
28ef6c31 | 715 | while (lpos >= _rl_screenwidth) |
d166f048 | 716 | { |
d3ad40de | 717 | int z; |
28ef6c31 JA |
718 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
719 | invisible characters that is longer than the screen width. The | |
720 | prompt_invis_chars_first_line variable could be made into an array | |
721 | saying how many invisible characters there are per line, but that's | |
722 | probably too much work for the benefit gained. How many people have | |
545f34cf CR |
723 | prompts that exceed two physical lines? |
724 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
37c41ab1 | 725 | #if defined (HANDLE_MULTIBYTE) |
33fe8777 | 726 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) |
37c41ab1 | 727 | { |
d3ad40de CR |
728 | n0 = num; |
729 | temp = local_prompt_len; | |
730 | while (num < temp) | |
37c41ab1 | 731 | { |
82a5df63 | 732 | z = _rl_col_width (local_prompt, n0, num, 1); |
d3ad40de CR |
733 | if (z > _rl_screenwidth) |
734 | { | |
735 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
736 | break; | |
737 | } | |
738 | else if (z == _rl_screenwidth) | |
739 | break; | |
740 | num++; | |
37c41ab1 | 741 | } |
d3ad40de | 742 | temp = num; |
37c41ab1 | 743 | } |
d3ad40de | 744 | else |
37c41ab1 | 745 | #endif /* !HANDLE_MULTIBYTE */ |
d3ad40de CR |
746 | temp = ((newlines + 1) * _rl_screenwidth); |
747 | ||
748 | /* Now account for invisible characters in the current line. */ | |
57a3f689 CR |
749 | /* XXX - this assumes that the invisible characters may be split, but only |
750 | between the first and the last lines. */ | |
6e51e0d0 CR |
751 | temp += (newlines == 0) ? prompt_invis_chars_first_line |
752 | : ((newlines == prompt_lines_estimate) ? wrap_offset : prompt_invis_chars_first_line); | |
753 | ||
d166f048 | 754 | inv_lbreaks[++newlines] = temp; |
37c41ab1 | 755 | #if defined (HANDLE_MULTIBYTE) |
33fe8777 | 756 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) |
82a5df63 | 757 | lpos -= _rl_col_width (local_prompt, n0, num, 1); |
d3ad40de | 758 | else |
37c41ab1 | 759 | #endif |
d3ad40de | 760 | lpos -= _rl_screenwidth; |
d166f048 | 761 | } |
ccc6cda3 | 762 | |
28ef6c31 JA |
763 | prompt_last_screen_line = newlines; |
764 | ||
765 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
d3ad40de | 766 | track of where the cursor is (cpos_buffer_position), the number of the line containing |
28ef6c31 JA |
767 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
768 | It maintains an array of line breaks for display (inv_lbreaks). | |
769 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 770 | lb_linenum = 0; |
7117c2d2 JA |
771 | #if defined (HANDLE_MULTIBYTE) |
772 | in = 0; | |
773 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
774 | { | |
775 | memset (&ps, 0, sizeof (mbstate_t)); | |
bf6bd355 | 776 | /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */ |
7117c2d2 JA |
777 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); |
778 | } | |
779 | else | |
780 | wc_bytes = 1; | |
781 | while (in < rl_end) | |
782 | #else | |
d166f048 | 783 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 784 | #endif |
726f6388 JA |
785 | { |
786 | c = (unsigned char)rl_line_buffer[in]; | |
787 | ||
7117c2d2 JA |
788 | #if defined (HANDLE_MULTIBYTE) |
789 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
790 | { | |
d3a24ed2 | 791 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
792 | { |
793 | /* Byte sequence is invalid or shortened. Assume that the | |
794 | first byte represents a character. */ | |
795 | wc_bytes = 1; | |
796 | /* Assume that a character occupies a single column. */ | |
797 | wc_width = 1; | |
798 | memset (&ps, 0, sizeof (mbstate_t)); | |
799 | } | |
d3a24ed2 | 800 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
801 | break; /* Found '\0' */ |
802 | else | |
803 | { | |
22818c14 | 804 | temp = WCWIDTH (wc); |
d3a24ed2 | 805 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
806 | } |
807 | } | |
808 | #endif | |
809 | ||
726f6388 JA |
810 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
811 | { | |
812 | line_size *= 2; | |
f73dda09 JA |
813 | visible_line = (char *)xrealloc (visible_line, line_size); |
814 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
815 | line = invisible_line; |
816 | } | |
817 | ||
818 | if (in == rl_point) | |
ccc6cda3 | 819 | { |
d3ad40de | 820 | cpos_buffer_position = out; |
ccc6cda3 JA |
821 | lb_linenum = newlines; |
822 | } | |
726f6388 | 823 | |
7117c2d2 JA |
824 | #if defined (HANDLE_MULTIBYTE) |
825 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
826 | #else | |
726f6388 | 827 | if (META_CHAR (c)) |
7117c2d2 | 828 | #endif |
726f6388 JA |
829 | { |
830 | if (_rl_output_meta_chars == 0) | |
831 | { | |
832 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 833 | |
28ef6c31 | 834 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 835 | { |
28ef6c31 | 836 | temp = _rl_screenwidth - lpos; |
bb70624e | 837 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
838 | inv_lbreaks[++newlines] = out + temp; |
839 | lpos = 4 - temp; | |
840 | } | |
841 | else | |
842 | lpos += 4; | |
843 | ||
726f6388 JA |
844 | out += 4; |
845 | } | |
846 | else | |
ccc6cda3 JA |
847 | { |
848 | line[out++] = c; | |
849 | CHECK_LPOS(); | |
850 | } | |
726f6388 JA |
851 | } |
852 | #if defined (DISPLAY_TABS) | |
853 | else if (c == '\t') | |
854 | { | |
28ef6c31 | 855 | register int newout; |
b72432fd JA |
856 | |
857 | #if 0 | |
ccc6cda3 | 858 | newout = (out | (int)7) + 1; |
b72432fd JA |
859 | #else |
860 | newout = out + 8 - lpos % 8; | |
861 | #endif | |
ccc6cda3 | 862 | temp = newout - out; |
28ef6c31 | 863 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
864 | { |
865 | register int temp2; | |
28ef6c31 | 866 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 867 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
868 | inv_lbreaks[++newlines] = out + temp2; |
869 | lpos = temp - temp2; | |
870 | while (out < newout) | |
871 | line[out++] = ' '; | |
872 | } | |
873 | else | |
874 | { | |
875 | while (out < newout) | |
876 | line[out++] = ' '; | |
877 | lpos += temp; | |
878 | } | |
726f6388 JA |
879 | } |
880 | #endif | |
28ef6c31 | 881 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
882 | { |
883 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 884 | CHECK_INV_LBREAKS (); |
b72432fd JA |
885 | inv_lbreaks[++newlines] = out; |
886 | lpos = 0; | |
887 | } | |
ccc6cda3 | 888 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
889 | { |
890 | line[out++] = '^'; | |
ccc6cda3 JA |
891 | CHECK_LPOS(); |
892 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
893 | CHECK_LPOS(); | |
726f6388 | 894 | } |
ccc6cda3 | 895 | else |
726f6388 | 896 | { |
7117c2d2 JA |
897 | #if defined (HANDLE_MULTIBYTE) |
898 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
899 | { | |
900 | register int i; | |
901 | ||
902 | _rl_wrapped_multicolumn = 0; | |
903 | ||
904 | if (_rl_screenwidth < lpos + wc_width) | |
905 | for (i = lpos; i < _rl_screenwidth; i++) | |
906 | { | |
907 | /* The space will be removed in update_line() */ | |
908 | line[out++] = ' '; | |
909 | _rl_wrapped_multicolumn++; | |
910 | CHECK_LPOS(); | |
911 | } | |
912 | if (in == rl_point) | |
913 | { | |
d3ad40de | 914 | cpos_buffer_position = out; |
7117c2d2 JA |
915 | lb_linenum = newlines; |
916 | } | |
917 | for (i = in; i < in+wc_bytes; i++) | |
918 | line[out++] = rl_line_buffer[i]; | |
919 | for (i = 0; i < wc_width; i++) | |
920 | CHECK_LPOS(); | |
921 | } | |
922 | else | |
923 | { | |
924 | line[out++] = c; | |
925 | CHECK_LPOS(); | |
926 | } | |
927 | #else | |
ccc6cda3 JA |
928 | line[out++] = c; |
929 | CHECK_LPOS(); | |
7117c2d2 JA |
930 | #endif |
931 | } | |
932 | ||
933 | #if defined (HANDLE_MULTIBYTE) | |
934 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
935 | { | |
936 | in += wc_bytes; | |
bf6bd355 | 937 | /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */ |
7117c2d2 | 938 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); |
726f6388 | 939 | } |
7117c2d2 JA |
940 | else |
941 | in++; | |
942 | #endif | |
943 | ||
726f6388 JA |
944 | } |
945 | line[out] = '\0'; | |
d3ad40de | 946 | if (cpos_buffer_position < 0) |
ccc6cda3 | 947 | { |
d3ad40de | 948 | cpos_buffer_position = out; |
ccc6cda3 JA |
949 | lb_linenum = newlines; |
950 | } | |
951 | ||
952 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 953 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
954 | inv_lbreaks[newlines+1] = out; |
955 | cursor_linenum = lb_linenum; | |
726f6388 | 956 | |
d3ad40de | 957 | /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed. |
28ef6c31 | 958 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
726f6388 JA |
959 | |
960 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
961 | line buffers are really multiple lines, which would wrap every | |
962 | (screenwidth - 1) characters. Go through each in turn, finding | |
963 | the changed region and updating it. The line order is top to bottom. */ | |
964 | ||
965 | /* If we can move the cursor up and down, then use multiple lines, | |
966 | otherwise, let long lines display in a single terminal line, and | |
967 | horizontally scroll it. */ | |
77b3aacb | 968 | displaying_prompt_first_line = 1; |
28ef6c31 | 969 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 970 | { |
28089d04 | 971 | int nleft, pos, changed_screen_line, tx; |
726f6388 JA |
972 | |
973 | if (!rl_display_fixed || forced_display) | |
974 | { | |
975 | forced_display = 0; | |
976 | ||
977 | /* If we have more than a screenful of material to display, then | |
978 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 979 | not the first. */ |
28ef6c31 | 980 | if (out >= _rl_screenchars) |
7117c2d2 JA |
981 | { |
982 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
983 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
984 | else | |
985 | out = _rl_screenchars - 1; | |
986 | } | |
726f6388 JA |
987 | |
988 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
989 | second and subsequent lines start at inv_lbreaks[N], offset by |
990 | OFFSET (which has already been calculated above). */ | |
726f6388 | 991 | |
866961ad | 992 | #define INVIS_FIRST() (prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset) |
234d8729 | 993 | #define WRAP_OFFSET(line, offset) ((line == 0) \ |
866961ad | 994 | ? (offset ? INVIS_FIRST() : 0) \ |
234d8729 | 995 | : ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0)) |
726f6388 | 996 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) |
ccc6cda3 JA |
997 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
998 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
999 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 1000 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 1001 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 | 1002 | |
4a8bb13f CR |
1003 | #define OLD_CPOS_IN_PROMPT() (cpos_adjusted == 0 && \ |
1004 | _rl_last_c_pos != o_cpos && \ | |
1005 | _rl_last_c_pos > wrap_offset && \ | |
1006 | o_cpos < prompt_last_invisible) | |
1007 | ||
726f6388 JA |
1008 | /* For each line in the buffer, do the updating display. */ |
1009 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
1010 | { | |
d3ad40de CR |
1011 | /* This can lead us astray if we execute a program that changes |
1012 | the locale from a non-multibyte to a multibyte one. */ | |
28089d04 | 1013 | o_cpos = _rl_last_c_pos; |
5c26afb8 | 1014 | cpos_adjusted = 0; |
726f6388 | 1015 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
ccc6cda3 | 1016 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 | 1017 | |
28089d04 CR |
1018 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
1019 | take invisible characters into account, since _rl_last_c_pos | |
1020 | is an absolute cursor position in a multibyte locale. See | |
1021 | if compensating here is the right thing, or if we have to | |
57a3f689 | 1022 | change update_line itself. There are several cases in which |
5c26afb8 CR |
1023 | update_line adjusts _rl_last_c_pos itself (so it can pass |
1024 | _rl_move_cursor_relative accurate values); it communicates | |
d3ad40de CR |
1025 | this back by setting cpos_adjusted. If we assume that |
1026 | _rl_last_c_pos is correct (an absolute cursor position) each | |
1027 | time update_line is called, then we can assume in our | |
1028 | calculations that o_cpos does not need to be adjusted by | |
1029 | wrap_offset. */ | |
4a8bb13f | 1030 | if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && OLD_CPOS_IN_PROMPT()) |
33fe8777 | 1031 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ |
234d8729 CR |
1032 | else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth && |
1033 | (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && | |
1034 | cpos_adjusted == 0 && | |
1035 | _rl_last_c_pos != o_cpos && | |
33fe8777 | 1036 | _rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line)) |
234d8729 | 1037 | _rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line); |
0d9b018b | 1038 | |
726f6388 JA |
1039 | /* If this is the line with the prompt, we might need to |
1040 | compensate for invisible characters in the new line. Do | |
1041 | this only if there is not more than one new line (which | |
1042 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
1043 | and the new line is shorter than the old. Make sure we are |
1044 | at the end of the new line before clearing. */ | |
726f6388 | 1045 | if (linenum == 0 && |
ccc6cda3 | 1046 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
1047 | (wrap_offset > visible_wrap_offset) && |
1048 | (_rl_last_c_pos < visible_first_line_len)) | |
1049 | { | |
177d51f7 CR |
1050 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1051 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
1052 | else | |
1053 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
726f6388 | 1054 | if (nleft) |
d166f048 | 1055 | _rl_clear_to_eol (nleft); |
726f6388 | 1056 | } |
234d8729 CR |
1057 | #if 0 |
1058 | /* This segment is intended to handle the case where the prompt | |
1059 | has invisible characters on the second line and the new line | |
1060 | to be displayed needs to clear the rest of the old characters | |
1061 | out (e.g., when printing the i-search prompt). In general, | |
1062 | the case of the new line being shorter than the old. | |
1063 | Incomplete */ | |
1064 | else if (linenum == prompt_last_screen_line && | |
1065 | prompt_physical_chars > _rl_screenwidth && | |
1066 | wrap_offset != prompt_invis_chars_first_line && | |
1067 | _rl_last_c_pos == out && | |
1068 | #endif | |
1069 | ||
726f6388 JA |
1070 | |
1071 | /* Since the new first line is now visible, save its length. */ | |
1072 | if (linenum == 0) | |
ccc6cda3 | 1073 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
1074 | } |
1075 | ||
1076 | /* We may have deleted some lines. If so, clear the left over | |
1077 | blank ones at the bottom out. */ | |
1078 | if (_rl_vis_botlin > inv_botlin) | |
1079 | { | |
1080 | char *tt; | |
1081 | for (; linenum <= _rl_vis_botlin; linenum++) | |
1082 | { | |
1083 | tt = VIS_CHARS (linenum); | |
1084 | _rl_move_vert (linenum); | |
1085 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 1086 | _rl_clear_to_eol |
28ef6c31 | 1087 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
1088 | } |
1089 | } | |
1090 | _rl_vis_botlin = inv_botlin; | |
1091 | ||
726f6388 JA |
1092 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
1093 | different screen line during this redisplay. */ | |
1094 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
1095 | if (changed_screen_line) | |
1096 | { | |
1097 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 1098 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
1099 | the physical cursor position on the screen stays the same, |
1100 | but the buffer position needs to be adjusted to account | |
1101 | for invisible characters. */ | |
6bf74e5a | 1102 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
b72432fd | 1103 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
1104 | } |
1105 | ||
1106 | /* We have to reprint the prompt if it contains invisible | |
1107 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
1108 | the characters from the current cursor position. But we |
1109 | only need to reprint it if the cursor is before the last | |
1110 | invisible character in the prompt string. */ | |
28ef6c31 | 1111 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1112 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
2abb7255 | 1113 | #if 0 |
ac18b312 | 1114 | _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt) |
2abb7255 CR |
1115 | #else |
1116 | _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt) | |
1117 | #endif | |
726f6388 | 1118 | { |
bb70624e JA |
1119 | #if defined (__MSDOS__) |
1120 | putc ('\r', rl_outstream); | |
1121 | #else | |
28ef6c31 JA |
1122 | if (_rl_term_cr) |
1123 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 1124 | #endif |
d3ad40de CR |
1125 | if (modmark) |
1126 | _rl_output_some_chars ("*", 1); | |
1127 | ||
726f6388 | 1128 | _rl_output_some_chars (local_prompt, nleft); |
7117c2d2 | 1129 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
82a5df63 | 1130 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft, 1) - wrap_offset + modmark; |
7117c2d2 | 1131 | else |
d3ad40de | 1132 | _rl_last_c_pos = nleft + modmark; |
726f6388 JA |
1133 | } |
1134 | ||
1135 | /* Where on that line? And where does that line start | |
1136 | in the buffer? */ | |
ccc6cda3 | 1137 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 | 1138 | /* nleft == number of characters in the line buffer between the |
d3ad40de CR |
1139 | start of the line and the desired cursor position. */ |
1140 | nleft = cpos_buffer_position - pos; | |
726f6388 | 1141 | |
6bf74e5a CR |
1142 | /* NLEFT is now a number of characters in a buffer. When in a |
1143 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
1144 | position that doesn't take invisible characters in the prompt | |
1145 | into account. We use a fudge factor to compensate. */ | |
6bf74e5a | 1146 | |
ccc6cda3 | 1147 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 1148 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 1149 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
1150 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
1151 | { | |
d3ad40de | 1152 | /* TX == new physical cursor position in multibyte locale. */ |
7117c2d2 | 1153 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
82a5df63 | 1154 | tx = _rl_col_width (&visible_line[pos], 0, nleft, 1) - visible_wrap_offset; |
7117c2d2 | 1155 | else |
177d51f7 | 1156 | tx = nleft; |
3d4e09aa | 1157 | if (tx >= 0 && _rl_last_c_pos > tx) |
d11b8b46 | 1158 | { |
28089d04 | 1159 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ |
d11b8b46 CR |
1160 | _rl_last_c_pos = tx; |
1161 | } | |
726f6388 JA |
1162 | } |
1163 | ||
28089d04 CR |
1164 | /* We need to note that in a multibyte locale we are dealing with |
1165 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1166 | point specified by a buffer position (NLEFT) that doesn't take | |
1167 | invisible characters into account. */ | |
7117c2d2 JA |
1168 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1169 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
1170 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
1171 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1172 | } | |
1173 | } | |
1174 | else /* Do horizontal scrolling. */ | |
1175 | { | |
1176 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1177 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1178 | ||
1179 | /* Always at top line. */ | |
1180 | _rl_last_v_pos = 0; | |
1181 | ||
1182 | /* Compute where in the buffer the displayed line should start. This | |
1183 | will be LMARGIN. */ | |
1184 | ||
1185 | /* The number of characters that will be displayed before the cursor. */ | |
d3ad40de | 1186 | ndisp = cpos_buffer_position - wrap_offset; |
28ef6c31 | 1187 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1188 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 1189 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
d3ad40de | 1190 | phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 1191 | t = _rl_screenwidth / 3; |
726f6388 JA |
1192 | |
1193 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 1194 | last_lmargin will be > 0. */ |
726f6388 JA |
1195 | |
1196 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
1197 | width, compute the starting offset so that the cursor is about |
1198 | two-thirds of the way across the screen. */ | |
28ef6c31 | 1199 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 | 1200 | { |
d3ad40de | 1201 | lmargin = cpos_buffer_position - (2 * t); |
726f6388 JA |
1202 | if (lmargin < 0) |
1203 | lmargin = 0; | |
1204 | /* If the left margin would be in the middle of a prompt with | |
1205 | invisible characters, don't display the prompt at all. */ | |
1206 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1207 | lmargin = nleft; | |
1208 | } | |
28ef6c31 | 1209 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1210 | lmargin = 0; |
726f6388 JA |
1211 | else if (phys_c_pos < 1) |
1212 | { | |
1213 | /* If we are moving back towards the beginning of the line and | |
1214 | the last margin is no longer correct, compute a new one. */ | |
d3ad40de | 1215 | lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */ |
726f6388 JA |
1216 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
1217 | lmargin = nleft; | |
1218 | } | |
1219 | else | |
b72432fd | 1220 | lmargin = last_lmargin; |
726f6388 | 1221 | |
77b3aacb CR |
1222 | displaying_prompt_first_line = lmargin < nleft; |
1223 | ||
726f6388 JA |
1224 | /* If the first character on the screen isn't the first character |
1225 | in the display line, indicate this with a special character. */ | |
1226 | if (lmargin > 0) | |
1227 | line[lmargin] = '<'; | |
1228 | ||
1229 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1230 | the whole line, indicate that with a special character at the |
1231 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1232 | wrap offset into account. */ | |
28ef6c31 | 1233 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1234 | if (t < out) |
b72432fd | 1235 | line[t - 1] = '>'; |
726f6388 | 1236 | |
bf6bd355 | 1237 | if (rl_display_fixed == 0 || forced_display || lmargin != last_lmargin) |
726f6388 JA |
1238 | { |
1239 | forced_display = 0; | |
bf6bd355 CR |
1240 | o_cpos = _rl_last_c_pos; |
1241 | cpos_adjusted = 0; | |
726f6388 JA |
1242 | update_line (&visible_line[last_lmargin], |
1243 | &invisible_line[lmargin], | |
1244 | 0, | |
28ef6c31 JA |
1245 | _rl_screenwidth + visible_wrap_offset, |
1246 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1247 | 0); |
1248 | ||
77b3aacb CR |
1249 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
1250 | displaying_prompt_first_line && OLD_CPOS_IN_PROMPT()) | |
4a8bb13f | 1251 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ |
bf6bd355 | 1252 | |
726f6388 JA |
1253 | /* If the visible new line is shorter than the old, but the number |
1254 | of invisible characters is greater, and we are at the end of | |
1255 | the new line, we need to clear to eol. */ | |
1256 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1257 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
77b3aacb | 1258 | (_rl_last_c_pos == out) && displaying_prompt_first_line && |
726f6388 JA |
1259 | t < visible_first_line_len) |
1260 | { | |
28ef6c31 | 1261 | nleft = _rl_screenwidth - t; |
d166f048 | 1262 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1263 | } |
1264 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1265 | if (visible_first_line_len > _rl_screenwidth) |
1266 | visible_first_line_len = _rl_screenwidth; | |
726f6388 | 1267 | |
d3ad40de | 1268 | _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]); |
726f6388 JA |
1269 | last_lmargin = lmargin; |
1270 | } | |
1271 | } | |
1272 | fflush (rl_outstream); | |
1273 | ||
1274 | /* Swap visible and non-visible lines. */ | |
1275 | { | |
d3ad40de | 1276 | struct line_state *vtemp = line_state_visible; |
bb70624e | 1277 | |
d3ad40de CR |
1278 | line_state_visible = line_state_invisible; |
1279 | line_state_invisible = vtemp; | |
bb70624e | 1280 | |
726f6388 JA |
1281 | rl_display_fixed = 0; |
1282 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1283 | are not displaying any invisible characters, so set visible_wrap_offset | |
1284 | to 0. */ | |
1285 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1286 | visible_wrap_offset = 0; | |
1287 | else | |
1288 | visible_wrap_offset = wrap_offset; | |
1289 | } | |
d356441f | 1290 | |
83c14a20 | 1291 | RL_UNSETSTATE (RL_STATE_REDISPLAYING); |
d356441f | 1292 | _rl_release_sigint (); |
726f6388 JA |
1293 | } |
1294 | ||
1295 | /* PWP: update_line() is based on finding the middle difference of each | |
1296 | line on the screen; vis: | |
1297 | ||
1298 | /old first difference | |
1299 | /beginning of line | /old last same /old EOL | |
1300 | v v v v | |
1301 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1302 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1303 | ^ ^ ^ ^ | |
1304 | \beginning of line | \new last same \new end of line | |
1305 | \new first difference | |
1306 | ||
1307 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1308 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1309 | |
1310 | Could be made even smarter, but this works well enough */ | |
1311 | static void | |
1312 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1313 | register char *old, *new; | |
ccc6cda3 | 1314 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1315 | { |
1316 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
3d4e09aa | 1317 | int temp, lendiff, wsatend, od, nd, twidth, o_cpos; |
ccc6cda3 | 1318 | int current_invis_chars; |
7117c2d2 | 1319 | int col_lendiff, col_temp; |
73a146be | 1320 | int bytes_to_insert; |
7117c2d2 JA |
1321 | #if defined (HANDLE_MULTIBYTE) |
1322 | mbstate_t ps_new, ps_old; | |
dc8fbaf9 | 1323 | int new_offset, old_offset; |
7117c2d2 | 1324 | #endif |
726f6388 JA |
1325 | |
1326 | /* If we're at the right edge of a terminal that supports xn, we're | |
1327 | ready to wrap around, so do so. This fixes problems with knowing | |
1328 | the exact cursor position and cut-and-paste with certain terminal | |
1329 | emulators. In this calculation, TEMP is the physical screen | |
1330 | position of the cursor. */ | |
177d51f7 CR |
1331 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1332 | temp = _rl_last_c_pos; | |
1333 | else | |
234d8729 | 1334 | temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset); |
28ef6c31 | 1335 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1336 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1337 | { |
7117c2d2 JA |
1338 | #if defined (HANDLE_MULTIBYTE) |
1339 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1340 | { | |
1341 | wchar_t wc; | |
1342 | mbstate_t ps; | |
1343 | int tempwidth, bytes; | |
1344 | size_t ret; | |
1345 | ||
1346 | /* This fixes only double-column characters, but if the wrapped | |
39feef01 | 1347 | character consumes more than three columns, spaces will be |
7117c2d2 | 1348 | inserted in the string buffer. */ |
d3ad40de CR |
1349 | if (current_line < line_state_visible->wbsize && line_state_visible->wrapped_line[current_line] > 0) |
1350 | _rl_clear_to_eol (line_state_visible->wrapped_line[current_line]); | |
7117c2d2 JA |
1351 | |
1352 | memset (&ps, 0, sizeof (mbstate_t)); | |
1353 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
d3a24ed2 | 1354 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1355 | { |
1356 | tempwidth = 1; | |
1357 | ret = 1; | |
1358 | } | |
d3a24ed2 | 1359 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1360 | tempwidth = 0; |
1361 | else | |
22818c14 | 1362 | tempwidth = WCWIDTH (wc); |
7117c2d2 JA |
1363 | |
1364 | if (tempwidth > 0) | |
1365 | { | |
9dd88db7 | 1366 | int count, i; |
7117c2d2 JA |
1367 | bytes = ret; |
1368 | for (count = 0; count < bytes; count++) | |
1369 | putc (new[count], rl_outstream); | |
1370 | _rl_last_c_pos = tempwidth; | |
1371 | _rl_last_v_pos++; | |
1372 | memset (&ps, 0, sizeof (mbstate_t)); | |
1373 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1374 | if (ret != 0 && bytes != 0) | |
1375 | { | |
d3a24ed2 | 1376 | if (MB_INVALIDCH (ret)) |
9dd88db7 CR |
1377 | ret = 1; |
1378 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
7117c2d2 | 1379 | memcpy (old, new, bytes); |
9dd88db7 CR |
1380 | /* Fix up indices if we copy data from one line to another */ |
1381 | omax += bytes - ret; | |
208fdb50 | 1382 | for (i = current_line+1; i <= inv_botlin+1; i++) |
9dd88db7 | 1383 | vis_lbreaks[i] += bytes - ret; |
7117c2d2 JA |
1384 | } |
1385 | } | |
1386 | else | |
1387 | { | |
1388 | putc (' ', rl_outstream); | |
1389 | _rl_last_c_pos = 1; | |
1390 | _rl_last_v_pos++; | |
1391 | if (old[0] && new[0]) | |
1392 | old[0] = new[0]; | |
1393 | } | |
1394 | } | |
726f6388 | 1395 | else |
7117c2d2 JA |
1396 | #endif |
1397 | { | |
1398 | if (new[0]) | |
1399 | putc (new[0], rl_outstream); | |
1400 | else | |
1401 | putc (' ', rl_outstream); | |
5c26afb8 | 1402 | _rl_last_c_pos = 1; |
7117c2d2 JA |
1403 | _rl_last_v_pos++; |
1404 | if (old[0] && new[0]) | |
1405 | old[0] = new[0]; | |
1406 | } | |
726f6388 | 1407 | } |
7117c2d2 | 1408 | |
726f6388 JA |
1409 | |
1410 | /* Find first difference. */ | |
7117c2d2 JA |
1411 | #if defined (HANDLE_MULTIBYTE) |
1412 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1413 | { | |
5e13499c CR |
1414 | /* See if the old line is a subset of the new line, so that the |
1415 | only change is adding characters. */ | |
1416 | temp = (omax < nmax) ? omax : nmax; | |
d3ad40de | 1417 | if (memcmp (old, new, temp) == 0) /* adding at the end */ |
7117c2d2 | 1418 | { |
22818c14 | 1419 | new_offset = old_offset = temp; |
5e13499c CR |
1420 | ofd = old + temp; |
1421 | nfd = new + temp; | |
d3a24ed2 CR |
1422 | } |
1423 | else | |
5e13499c CR |
1424 | { |
1425 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1426 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1427 | ||
1428 | if (omax == nmax && STREQN (new, old, omax)) | |
d3a24ed2 | 1429 | { |
22818c14 CR |
1430 | old_offset = omax; |
1431 | new_offset = nmax; | |
5e13499c CR |
1432 | ofd = old + omax; |
1433 | nfd = new + nmax; | |
1434 | } | |
1435 | else | |
1436 | { | |
1437 | new_offset = old_offset = 0; | |
1438 | for (ofd = old, nfd = new; | |
1439 | (ofd - old < omax) && *ofd && | |
1440 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1441 | { | |
1442 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1443 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
22818c14 | 1444 | |
5e13499c CR |
1445 | ofd = old + old_offset; |
1446 | nfd = new + new_offset; | |
1447 | } | |
d3a24ed2 | 1448 | } |
7117c2d2 JA |
1449 | } |
1450 | } | |
1451 | else | |
1452 | #endif | |
726f6388 JA |
1453 | for (ofd = old, nfd = new; |
1454 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1455 | ofd++, nfd++) | |
1456 | ; | |
1457 | ||
1458 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1459 | of the distance between ne and new and oe and old, respectively, to | |
1460 | move a subtraction out of each loop. */ | |
1461 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1462 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1463 | ||
1464 | /* If no difference, continue to next line. */ | |
1465 | if (ofd == oe && nfd == ne) | |
1466 | return; | |
1467 | ||
22818c14 CR |
1468 | #if defined (HANDLE_MULTIBYTE) |
1469 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && _rl_utf8locale) | |
1470 | { | |
1471 | wchar_t wc; | |
1472 | mbstate_t ps = { 0 }; | |
1473 | int t; | |
1474 | ||
1475 | /* If the first character in the difference is a zero-width character, | |
1476 | assume it's a combining character and back one up so the two base | |
1477 | characters no longer compare equivalently. */ | |
1478 | t = mbrtowc (&wc, ofd, MB_CUR_MAX, &ps); | |
1479 | if (t > 0 && UNICODE_COMBINING_CHAR (wc) && WCWIDTH (wc) == 0) | |
1480 | { | |
1481 | old_offset = _rl_find_prev_mbchar (old, ofd - old, MB_FIND_ANY); | |
1482 | new_offset = _rl_find_prev_mbchar (new, nfd - new, MB_FIND_ANY); | |
1483 | ofd = old + old_offset; /* equal by definition */ | |
1484 | nfd = new + new_offset; | |
1485 | } | |
1486 | } | |
1487 | #endif | |
1488 | ||
726f6388 | 1489 | wsatend = 1; /* flag for trailing whitespace */ |
7117c2d2 JA |
1490 | |
1491 | #if defined (HANDLE_MULTIBYTE) | |
1492 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1493 | { | |
1494 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1495 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
22818c14 | 1496 | |
7117c2d2 JA |
1497 | while ((ols > ofd) && (nls > nfd)) |
1498 | { | |
1499 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1500 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1501 | ||
d3a24ed2 CR |
1502 | #if 0 |
1503 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1504 | _rl_adjust_point (old, ols - old, &ps_old); |
1505 | _rl_adjust_point (new, nls - new, &ps_new); | |
d3a24ed2 | 1506 | #endif |
7117c2d2 JA |
1507 | |
1508 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1509 | break; | |
1510 | ||
1511 | if (*ols == ' ') | |
1512 | wsatend = 0; | |
1513 | ||
1514 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1515 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1516 | } | |
1517 | } | |
1518 | else | |
1519 | { | |
1520 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1521 | ols = oe - 1; /* find last same */ |
1522 | nls = ne - 1; | |
1523 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1524 | { | |
1525 | if (*ols != ' ') | |
1526 | wsatend = 0; | |
1527 | ols--; | |
1528 | nls--; | |
1529 | } | |
7117c2d2 JA |
1530 | #if defined (HANDLE_MULTIBYTE) |
1531 | } | |
1532 | #endif | |
726f6388 JA |
1533 | |
1534 | if (wsatend) | |
1535 | { | |
1536 | ols = oe; | |
1537 | nls = ne; | |
1538 | } | |
7117c2d2 JA |
1539 | #if defined (HANDLE_MULTIBYTE) |
1540 | /* This may not work for stateful encoding, but who cares? To handle | |
1541 | stateful encoding properly, we have to scan each string from the | |
1542 | beginning and compare. */ | |
1543 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1544 | #else | |
726f6388 | 1545 | else if (*ols != *nls) |
7117c2d2 | 1546 | #endif |
726f6388 JA |
1547 | { |
1548 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 JA |
1549 | { |
1550 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1551 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1552 | else | |
1553 | ols++; | |
1554 | } | |
726f6388 | 1555 | if (*nls) |
7117c2d2 JA |
1556 | { |
1557 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1558 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1559 | else | |
1560 | nls++; | |
1561 | } | |
726f6388 JA |
1562 | } |
1563 | ||
ccc6cda3 JA |
1564 | /* count of invisible characters in the current invisible line. */ |
1565 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1566 | if (_rl_last_v_pos != current_line) | |
1567 | { | |
1568 | _rl_move_vert (current_line); | |
177d51f7 | 1569 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
ccc6cda3 JA |
1570 | _rl_last_c_pos += visible_wrap_offset; |
1571 | } | |
726f6388 JA |
1572 | |
1573 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1574 | prompt string, and the prompt string has not changed, and the current |
1575 | cursor position is before the last invisible character in the prompt, | |
1576 | and the index of the character to move to is past the end of the prompt | |
1577 | string, then redraw the entire prompt string. We can only do this | |
1578 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1579 | |
ccc6cda3 JA |
1580 | This is not an efficiency hack -- there is a problem with redrawing |
1581 | portions of the prompt string if they contain terminal escape | |
1582 | sequences (like drawing the `unbold' sequence without a corresponding | |
1583 | `bold') that manifests itself on certain terminals. */ | |
726f6388 | 1584 | |
d3ad40de | 1585 | lendiff = local_prompt_len; |
ccc6cda3 | 1586 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 1587 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 | 1588 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
d3ad40de | 1589 | od >= lendiff && _rl_last_c_pos < PROMPT_ENDING_INDEX) |
726f6388 | 1590 | { |
bb70624e JA |
1591 | #if defined (__MSDOS__) |
1592 | putc ('\r', rl_outstream); | |
1593 | #else | |
28ef6c31 | 1594 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1595 | #endif |
d3ad40de CR |
1596 | if (modmark) |
1597 | _rl_output_some_chars ("*", 1); | |
726f6388 | 1598 | _rl_output_some_chars (local_prompt, lendiff); |
7117c2d2 | 1599 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5c26afb8 CR |
1600 | { |
1601 | /* We take wrap_offset into account here so we can pass correct | |
1602 | information to _rl_move_cursor_relative. */ | |
82a5df63 | 1603 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff, 1) - wrap_offset + modmark; |
5c26afb8 CR |
1604 | cpos_adjusted = 1; |
1605 | } | |
7117c2d2 | 1606 | else |
d3ad40de | 1607 | _rl_last_c_pos = lendiff + modmark; |
726f6388 JA |
1608 | } |
1609 | ||
3d4e09aa CR |
1610 | o_cpos = _rl_last_c_pos; |
1611 | ||
d3ad40de | 1612 | /* When this function returns, _rl_last_c_pos is correct, and an absolute |
39feef01 | 1613 | cursor position in multibyte mode, but a buffer index when not in a |
d3ad40de | 1614 | multibyte locale. */ |
ccc6cda3 | 1615 | _rl_move_cursor_relative (od, old); |
73a146be | 1616 | |
d3ad40de CR |
1617 | #if defined (HANDLE_MULTIBYTE) |
1618 | /* We need to indicate that the cursor position is correct in the presence of | |
1619 | invisible characters in the prompt string. Let's see if setting this when | |
1620 | we make sure we're at the end of the drawn prompt string works. */ | |
3d4e09aa CR |
1621 | if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 && |
1622 | (_rl_last_c_pos > 0 || o_cpos > 0) && | |
1623 | _rl_last_c_pos == prompt_physical_chars) | |
d3ad40de | 1624 | cpos_adjusted = 1; |
d3ad40de | 1625 | #endif |
726f6388 | 1626 | |
7117c2d2 | 1627 | /* if (len (new) > len (old)) |
73a146be CR |
1628 | lendiff == difference in buffer (bytes) |
1629 | col_lendiff == difference on screen (columns) | |
7117c2d2 | 1630 | When not using multibyte characters, these are equal */ |
726f6388 | 1631 | lendiff = (nls - nfd) - (ols - ofd); |
7117c2d2 | 1632 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
82a5df63 | 1633 | col_lendiff = _rl_col_width (new, nfd - new, nls - new, 1) - _rl_col_width (old, ofd - old, ols - old, 1); |
7117c2d2 JA |
1634 | else |
1635 | col_lendiff = lendiff; | |
726f6388 | 1636 | |
ccc6cda3 JA |
1637 | /* If we are changing the number of invisible characters in a line, and |
1638 | the spot of first difference is before the end of the invisible chars, | |
1639 | lendiff needs to be adjusted. */ | |
0d9b018b | 1640 | if (current_line == 0 && /* !_rl_horizontal_scroll_mode && */ |
ccc6cda3 | 1641 | current_invis_chars != visible_wrap_offset) |
7117c2d2 JA |
1642 | { |
1643 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1644 | { | |
1645 | lendiff += visible_wrap_offset - current_invis_chars; | |
1646 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1647 | } | |
1648 | else | |
1649 | { | |
1650 | lendiff += visible_wrap_offset - current_invis_chars; | |
1651 | col_lendiff = lendiff; | |
1652 | } | |
1653 | } | |
ccc6cda3 | 1654 | |
73a146be CR |
1655 | /* We use temp as a count of the number of bytes from the first difference |
1656 | to the end of the new line. col_temp is the corresponding number of | |
1657 | screen columns. A `dumb' update moves to the spot of first difference | |
1658 | and writes TEMP bytes. */ | |
726f6388 JA |
1659 | /* Insert (diff (len (old), len (new)) ch. */ |
1660 | temp = ne - nfd; | |
7117c2d2 | 1661 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
82a5df63 | 1662 | col_temp = _rl_col_width (new, nfd - new, ne - new, 1); |
7117c2d2 JA |
1663 | else |
1664 | col_temp = temp; | |
1665 | ||
73a146be CR |
1666 | /* how many bytes from the new line buffer to write to the display */ |
1667 | bytes_to_insert = nls - nfd; | |
1668 | ||
1669 | /* col_lendiff > 0 if we are adding characters to the line */ | |
7117c2d2 | 1670 | if (col_lendiff > 0) /* XXX - was lendiff */ |
726f6388 JA |
1671 | { |
1672 | /* Non-zero if we're increasing the number of lines. */ | |
1673 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
b0c16657 CR |
1674 | /* If col_lendiff is > 0, implying that the new string takes up more |
1675 | screen real estate than the old, but lendiff is < 0, meaning that it | |
1676 | takes fewer bytes, we need to just output the characters starting | |
1677 | from the first difference. These will overwrite what is on the | |
1678 | display, so there's no reason to do a smart update. This can really | |
1679 | only happen in a multibyte environment. */ | |
1680 | if (lendiff < 0) | |
1681 | { | |
1682 | _rl_output_some_chars (nfd, temp); | |
73a146be | 1683 | _rl_last_c_pos += col_temp; /* XXX - was _rl_col_width (nfd, 0, temp, 1); */ |
b0c16657 CR |
1684 | /* If nfd begins before any invisible characters in the prompt, |
1685 | adjust _rl_last_c_pos to account for wrap_offset and set | |
1686 | cpos_adjusted to let the caller know. */ | |
73a146be | 1687 | if (current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
b0c16657 CR |
1688 | { |
1689 | _rl_last_c_pos -= wrap_offset; | |
1690 | cpos_adjusted = 1; | |
1691 | } | |
1692 | return; | |
1693 | } | |
726f6388 JA |
1694 | /* Sometimes it is cheaper to print the characters rather than |
1695 | use the terminal's capabilities. If we're growing the number | |
1696 | of lines, make sure we actually cause the new line to wrap | |
1697 | around on auto-wrapping terminals. */ | |
b0c16657 | 1698 | else if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1699 | { |
28ef6c31 | 1700 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1701 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1702 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 | 1703 | invisible characters. We need to just draw them. */ |
57a3f689 CR |
1704 | /* The same thing happens if we're trying to draw before the last |
1705 | invisible character in the prompt string or we're increasing the | |
1706 | number of invisible characters in the line and we're not drawing | |
1707 | the entire prompt string. */ | |
1708 | if (*ols && ((_rl_horizontal_scroll_mode && | |
1709 | _rl_last_c_pos == 0 && | |
1710 | lendiff > prompt_visible_length && | |
1711 | current_invis_chars > 0) == 0) && | |
1712 | (((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && | |
1713 | current_line == 0 && wrap_offset && | |
1714 | ((nfd - new) <= prompt_last_invisible) && | |
1715 | (col_lendiff < prompt_visible_length)) == 0) && | |
1716 | (visible_wrap_offset >= current_invis_chars)) | |
726f6388 | 1717 | { |
73a146be CR |
1718 | open_some_spaces (col_lendiff); |
1719 | _rl_output_some_chars (nfd, bytes_to_insert); | |
c7e43312 CR |
1720 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1721 | _rl_last_c_pos += _rl_col_width (nfd, 0, bytes_to_insert, 1); | |
1722 | else | |
1723 | _rl_last_c_pos += bytes_to_insert; | |
726f6388 | 1724 | } |
d90269dd | 1725 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
726f6388 JA |
1726 | { |
1727 | /* At the end of a line the characters do not have to | |
1728 | be "inserted". They can just be placed on the screen. */ | |
c7e43312 CR |
1729 | _rl_output_some_chars (nfd, temp); |
1730 | _rl_last_c_pos += col_temp; | |
1731 | return; | |
726f6388 | 1732 | } |
73a146be | 1733 | else /* just write from first difference to end of new line */ |
ccc6cda3 | 1734 | { |
ccc6cda3 | 1735 | _rl_output_some_chars (nfd, temp); |
5c26afb8 | 1736 | _rl_last_c_pos += col_temp; |
57a3f689 CR |
1737 | /* If nfd begins before the last invisible character in the |
1738 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1739 | and set cpos_adjusted to let the caller know. */ | |
77b3aacb | 1740 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
97c2aab2 CR |
1741 | { |
1742 | _rl_last_c_pos -= wrap_offset; | |
1743 | cpos_adjusted = 1; | |
1744 | } | |
ccc6cda3 JA |
1745 | return; |
1746 | } | |
73a146be CR |
1747 | |
1748 | if (bytes_to_insert > lendiff) | |
726f6388 | 1749 | { |
57a3f689 CR |
1750 | /* If nfd begins before the last invisible character in the |
1751 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1752 | and set cpos_adjusted to let the caller know. */ | |
77b3aacb | 1753 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
57a3f689 CR |
1754 | { |
1755 | _rl_last_c_pos -= wrap_offset; | |
1756 | cpos_adjusted = 1; | |
1757 | } | |
726f6388 JA |
1758 | } |
1759 | } | |
1760 | else | |
1761 | { | |
1762 | /* cannot insert chars, write to EOL */ | |
1763 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1764 | _rl_last_c_pos += col_temp; |
5c26afb8 CR |
1765 | /* If we're in a multibyte locale and were before the last invisible |
1766 | char in the current line (which implies we just output some invisible | |
28089d04 CR |
1767 | characters) we need to adjust _rl_last_c_pos, since it represents |
1768 | a physical character position. */ | |
57a3f689 CR |
1769 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
1770 | current_line == prompt_last_screen_line && wrap_offset && | |
77b3aacb | 1771 | displaying_prompt_first_line && |
57a3f689 CR |
1772 | wrap_offset != prompt_invis_chars_first_line && |
1773 | ((nfd-new) < (prompt_last_invisible-(current_line*_rl_screenwidth)))) | |
1774 | { | |
1775 | _rl_last_c_pos -= wrap_offset - prompt_invis_chars_first_line; | |
1776 | cpos_adjusted = 1; | |
1777 | } | |
726f6388 JA |
1778 | } |
1779 | } | |
1780 | else /* Delete characters from line. */ | |
1781 | { | |
1782 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1783 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1784 | { |
1785 | /* If all we're doing is erasing the invisible characters in the | |
1786 | prompt string, don't bother. It screws up the assumptions | |
1787 | about what's on the screen. */ | |
1788 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
77b3aacb | 1789 | displaying_prompt_first_line && |
726f6388 | 1790 | -lendiff == visible_wrap_offset) |
7117c2d2 | 1791 | col_lendiff = 0; |
726f6388 | 1792 | |
77b3aacb CR |
1793 | /* If we have moved lmargin and we're shrinking the line, we've |
1794 | already moved the cursor to the first character of the new line, | |
1795 | so deleting -col_lendiff characters will mess up the cursor | |
1796 | position calculation */ | |
1797 | if (_rl_horizontal_scroll_mode && displaying_prompt_first_line == 0 && | |
1798 | col_lendiff && _rl_last_c_pos < -col_lendiff) | |
1799 | col_lendiff = 0; | |
1800 | ||
7117c2d2 JA |
1801 | if (col_lendiff) |
1802 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 | 1803 | |
73a146be CR |
1804 | /* Copy (new) chars to screen from first diff to last match, |
1805 | overwriting what is there. */ | |
1806 | if (bytes_to_insert > 0) | |
726f6388 | 1807 | { |
d3ad40de CR |
1808 | /* If nfd begins at the prompt, or before the invisible |
1809 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1810 | in a multibyte locale to account for the wrap offset and | |
1811 | set cpos_adjusted accordingly. */ | |
73a146be | 1812 | _rl_output_some_chars (nfd, bytes_to_insert); |
d3ad40de CR |
1813 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1814 | { | |
73a146be | 1815 | _rl_last_c_pos += _rl_col_width (nfd, 0, bytes_to_insert, 1); |
77b3aacb CR |
1816 | if (current_line == 0 && wrap_offset && |
1817 | displaying_prompt_first_line && | |
1818 | _rl_last_c_pos > wrap_offset && | |
1819 | ((nfd - new) <= prompt_last_invisible)) | |
d3ad40de CR |
1820 | { |
1821 | _rl_last_c_pos -= wrap_offset; | |
1822 | cpos_adjusted = 1; | |
1823 | } | |
1824 | } | |
1825 | else | |
73a146be | 1826 | _rl_last_c_pos += bytes_to_insert; |
77b3aacb | 1827 | |
0d9b018b CR |
1828 | /* XXX - we only want to do this if we are at the end of the line |
1829 | so we move there with _rl_move_cursor_relative */ | |
77b3aacb | 1830 | if (_rl_horizontal_scroll_mode && ((oe-old) > (ne-new))) |
0d9b018b CR |
1831 | { |
1832 | _rl_move_cursor_relative (ne-new, new); | |
1833 | goto clear_rest_of_line; | |
1834 | } | |
726f6388 JA |
1835 | } |
1836 | } | |
1837 | /* Otherwise, print over the existing material. */ | |
1838 | else | |
1839 | { | |
1840 | if (temp > 0) | |
1841 | { | |
d3ad40de CR |
1842 | /* If nfd begins at the prompt, or before the invisible |
1843 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1844 | in a multibyte locale to account for the wrap offset and | |
1845 | set cpos_adjusted accordingly. */ | |
726f6388 | 1846 | _rl_output_some_chars (nfd, temp); |
28089d04 | 1847 | _rl_last_c_pos += col_temp; /* XXX */ |
d3ad40de CR |
1848 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1849 | { | |
77b3aacb CR |
1850 | if (current_line == 0 && wrap_offset && |
1851 | displaying_prompt_first_line && | |
1852 | _rl_last_c_pos > wrap_offset && | |
1853 | ((nfd - new) <= prompt_last_invisible)) | |
d3ad40de CR |
1854 | { |
1855 | _rl_last_c_pos -= wrap_offset; | |
1856 | cpos_adjusted = 1; | |
1857 | } | |
1858 | } | |
726f6388 | 1859 | } |
77b3aacb | 1860 | clear_rest_of_line: |
726f6388 | 1861 | lendiff = (oe - old) - (ne - new); |
7117c2d2 | 1862 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
82a5df63 | 1863 | col_lendiff = _rl_col_width (old, 0, oe - old, 1) - _rl_col_width (new, 0, ne - new, 1); |
7117c2d2 JA |
1864 | else |
1865 | col_lendiff = lendiff; | |
1866 | ||
57a3f689 CR |
1867 | /* If we've already printed over the entire width of the screen, |
1868 | including the old material, then col_lendiff doesn't matter and | |
1869 | space_to_eol will insert too many spaces. XXX - maybe we should | |
1870 | adjust col_lendiff based on the difference between _rl_last_c_pos | |
1871 | and _rl_screenwidth */ | |
83c14a20 | 1872 | if (col_lendiff && ((MB_CUR_MAX == 1 || rl_byte_oriented) || (_rl_last_c_pos < _rl_screenwidth))) |
b72432fd JA |
1873 | { |
1874 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 1875 | space_to_eol (col_lendiff); |
b72432fd | 1876 | else |
7117c2d2 | 1877 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 1878 | } |
726f6388 JA |
1879 | } |
1880 | } | |
1881 | } | |
1882 | ||
1883 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1884 | int |
726f6388 JA |
1885 | rl_on_new_line () |
1886 | { | |
1887 | if (visible_line) | |
1888 | visible_line[0] = '\0'; | |
1889 | ||
1890 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1891 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1892 | if (vis_lbreaks) |
1893 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1894 | visible_wrap_offset = 0; | |
726f6388 JA |
1895 | return 0; |
1896 | } | |
1897 | ||
bb70624e JA |
1898 | /* Tell the update routines that we have moved onto a new line with the |
1899 | prompt already displayed. Code originally from the version of readline | |
61deeb13 CR |
1900 | distributed with CLISP. rl_expand_prompt must have already been called |
1901 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
1902 | int |
1903 | rl_on_new_line_with_prompt () | |
1904 | { | |
1905 | int prompt_size, i, l, real_screenwidth, newlines; | |
61deeb13 | 1906 | char *prompt_last_line, *lprompt; |
bb70624e JA |
1907 | |
1908 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1909 | the already-displayed prompt. */ | |
1910 | prompt_size = strlen (rl_prompt) + 1; | |
1911 | init_line_structures (prompt_size); | |
1912 | ||
1913 | /* Make sure the line structures hold the already-displayed prompt for | |
1914 | redisplay. */ | |
61deeb13 CR |
1915 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1916 | strcpy (visible_line, lprompt); | |
1917 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
1918 | |
1919 | /* If the prompt contains newlines, take the last tail. */ | |
1920 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1921 | if (!prompt_last_line) | |
1922 | prompt_last_line = rl_prompt; | |
1923 | ||
1924 | l = strlen (prompt_last_line); | |
7117c2d2 | 1925 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
82a5df63 | 1926 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l, 1); /* XXX */ |
7117c2d2 JA |
1927 | else |
1928 | _rl_last_c_pos = l; | |
bb70624e JA |
1929 | |
1930 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1931 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1932 | one less, see terminal.c. */ | |
28ef6c31 | 1933 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1934 | _rl_last_v_pos = l / real_screenwidth; |
1935 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1936 | whether the cursor is at the end of the last line, or already at the | |
1937 | beginning of the next line. Output a newline just to be safe. */ | |
1938 | if (l > 0 && (l % real_screenwidth) == 0) | |
1939 | _rl_output_some_chars ("\n", 1); | |
1940 | last_lmargin = 0; | |
1941 | ||
1942 | newlines = 0; i = 0; | |
1943 | while (i <= l) | |
1944 | { | |
1945 | _rl_vis_botlin = newlines; | |
1946 | vis_lbreaks[newlines++] = i; | |
1947 | i += real_screenwidth; | |
1948 | } | |
1949 | vis_lbreaks[newlines] = l; | |
1950 | visible_wrap_offset = 0; | |
1951 | ||
61deeb13 CR |
1952 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1953 | ||
bb70624e JA |
1954 | return 0; |
1955 | } | |
1956 | ||
726f6388 | 1957 | /* Actually update the display, period. */ |
ccc6cda3 | 1958 | int |
726f6388 JA |
1959 | rl_forced_update_display () |
1960 | { | |
0cc62c12 CR |
1961 | register char *temp; |
1962 | ||
726f6388 JA |
1963 | if (visible_line) |
1964 | { | |
0cc62c12 | 1965 | temp = visible_line; |
ccc6cda3 | 1966 | while (*temp) |
b72432fd | 1967 | *temp++ = '\0'; |
726f6388 JA |
1968 | } |
1969 | rl_on_new_line (); | |
1970 | forced_display++; | |
ccc6cda3 | 1971 | (*rl_redisplay_function) (); |
726f6388 JA |
1972 | return 0; |
1973 | } | |
1974 | ||
1975 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
28089d04 CR |
1976 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
1977 | buffer index.) | |
726f6388 JA |
1978 | DATA is the contents of the screen line of interest; i.e., where |
1979 | the movement is being done. */ | |
1980 | void | |
1981 | _rl_move_cursor_relative (new, data) | |
1982 | int new; | |
28ef6c31 | 1983 | const char *data; |
726f6388 JA |
1984 | { |
1985 | register int i; | |
28089d04 CR |
1986 | int woff; /* number of invisible chars on current line */ |
1987 | int cpos, dpos; /* current and desired cursor positions */ | |
dfc21851 | 1988 | int adjust; |
726f6388 | 1989 | |
234d8729 | 1990 | woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset); |
28089d04 | 1991 | cpos = _rl_last_c_pos; |
d0ca3503 CR |
1992 | |
1993 | if (cpos == 0 && cpos == new) | |
1994 | return; | |
1995 | ||
7117c2d2 JA |
1996 | #if defined (HANDLE_MULTIBYTE) |
1997 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1998 | a multibyte string, but _rl_last_c_pos is the display position. In | |
d3a24ed2 | 1999 | this case, NEW's display position is not obvious and must be |
28089d04 CR |
2000 | calculated. We need to account for invisible characters in this line, |
2001 | as long as we are past them and they are counted by _rl_col_width. */ | |
2002 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
d3a24ed2 | 2003 | { |
dfc21851 CR |
2004 | adjust = 1; |
2005 | /* Try to short-circuit common cases and eliminate a bunch of multibyte | |
2006 | character function calls. */ | |
2007 | /* 1. prompt string */ | |
2008 | if (new == local_prompt_len && memcmp (data, local_prompt, new) == 0) | |
2009 | { | |
82a5df63 | 2010 | dpos = prompt_physical_chars; |
dfc21851 CR |
2011 | cpos_adjusted = 1; |
2012 | adjust = 0; | |
2013 | } | |
2014 | /* 2. prompt_string + line contents */ | |
2015 | else if (new > local_prompt_len && local_prompt && memcmp (data, local_prompt, local_prompt_len) == 0) | |
2016 | { | |
82a5df63 | 2017 | dpos = prompt_physical_chars + _rl_col_width (data, local_prompt_len, new, 1); |
dfc21851 CR |
2018 | cpos_adjusted = 1; |
2019 | adjust = 0; | |
2020 | } | |
2021 | else | |
82a5df63 | 2022 | dpos = _rl_col_width (data, 0, new, 1); |
dfc21851 | 2023 | |
77b3aacb CR |
2024 | if (displaying_prompt_first_line == 0) |
2025 | adjust = 0; | |
2026 | ||
d3ad40de CR |
2027 | /* Use NEW when comparing against the last invisible character in the |
2028 | prompt string, since they're both buffer indices and DPOS is a | |
2029 | desired display position. */ | |
dfc21851 | 2030 | if (adjust && ((new > prompt_last_invisible) || /* XXX - don't use woff here */ |
d0ca3503 | 2031 | (prompt_physical_chars >= _rl_screenwidth && |
234d8729 | 2032 | _rl_last_v_pos == prompt_last_screen_line && |
d0ca3503 | 2033 | wrap_offset >= woff && dpos >= woff && |
dfc21851 | 2034 | new > (prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset)))) |
57a3f689 | 2035 | /* XXX last comparison might need to be >= */ |
d3ad40de CR |
2036 | { |
2037 | dpos -= woff; | |
2038 | /* Since this will be assigned to _rl_last_c_pos at the end (more | |
2039 | precisely, _rl_last_c_pos == dpos when this function returns), | |
2040 | let the caller know. */ | |
2041 | cpos_adjusted = 1; | |
2042 | } | |
d3a24ed2 | 2043 | } |
28089d04 | 2044 | else |
7117c2d2 | 2045 | #endif |
28089d04 CR |
2046 | dpos = new; |
2047 | ||
2048 | /* If we don't have to do anything, then return. */ | |
2049 | if (cpos == dpos) | |
2050 | return; | |
726f6388 JA |
2051 | |
2052 | /* It may be faster to output a CR, and then move forwards instead | |
2053 | of moving backwards. */ | |
2054 | /* i == current physical cursor position. */ | |
28089d04 CR |
2055 | #if defined (HANDLE_MULTIBYTE) |
2056 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
2057 | i = _rl_last_c_pos; | |
2058 | else | |
2059 | #endif | |
2060 | i = _rl_last_c_pos - woff; | |
d3ad40de | 2061 | if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) || |
28ef6c31 | 2062 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
2063 | { |
2064 | #if defined (__MSDOS__) | |
2065 | putc ('\r', rl_outstream); | |
2066 | #else | |
28ef6c31 | 2067 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 | 2068 | #endif /* !__MSDOS__ */ |
28089d04 | 2069 | cpos = _rl_last_c_pos = 0; |
726f6388 JA |
2070 | } |
2071 | ||
28089d04 | 2072 | if (cpos < dpos) |
726f6388 JA |
2073 | { |
2074 | /* Move the cursor forward. We do it by printing the command | |
2075 | to move the cursor forward if there is one, else print that | |
2076 | portion of the output buffer again. Which is cheaper? */ | |
2077 | ||
2078 | /* The above comment is left here for posterity. It is faster | |
2079 | to print one character (non-control) than to print a control | |
2080 | sequence telling the terminal to move forward one character. | |
2081 | That kind of control is for people who don't know what the | |
2082 | data is underneath the cursor. */ | |
d3ad40de CR |
2083 | |
2084 | /* However, we need a handle on where the current display position is | |
2085 | in the buffer for the immediately preceding comment to be true. | |
2086 | In multibyte locales, we don't currently have that info available. | |
2087 | Without it, we don't know where the data we have to display begins | |
2088 | in the buffer and we have to go back to the beginning of the screen | |
2089 | line. In this case, we can use the terminal sequence to move forward | |
2090 | if it's available. */ | |
7117c2d2 JA |
2091 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
2092 | { | |
d3ad40de CR |
2093 | if (_rl_term_forward_char) |
2094 | { | |
2095 | for (i = cpos; i < dpos; i++) | |
2096 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
2097 | } | |
2098 | else | |
2099 | { | |
2100 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2101 | for (i = 0; i < new; i++) | |
2102 | putc (data[i], rl_outstream); | |
2103 | } | |
7117c2d2 | 2104 | } |
726f6388 | 2105 | else |
28089d04 | 2106 | for (i = cpos; i < new; i++) |
726f6388 | 2107 | putc (data[i], rl_outstream); |
726f6388 | 2108 | } |
28089d04 | 2109 | |
7117c2d2 JA |
2110 | #if defined (HANDLE_MULTIBYTE) |
2111 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
2112 | The byte length of the string is probably bigger than the column width | |
2113 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
2114 | display point is less than _rl_last_c_pos. */ | |
7117c2d2 | 2115 | #endif |
28089d04 CR |
2116 | else if (cpos > dpos) |
2117 | _rl_backspace (cpos - dpos); | |
7117c2d2 | 2118 | |
28089d04 | 2119 | _rl_last_c_pos = dpos; |
726f6388 JA |
2120 | } |
2121 | ||
2122 | /* PWP: move the cursor up or down. */ | |
2123 | void | |
2124 | _rl_move_vert (to) | |
2125 | int to; | |
2126 | { | |
2127 | register int delta, i; | |
2128 | ||
28ef6c31 | 2129 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
2130 | return; |
2131 | ||
726f6388 JA |
2132 | if ((delta = to - _rl_last_v_pos) > 0) |
2133 | { | |
2134 | for (i = 0; i < delta; i++) | |
2135 | putc ('\n', rl_outstream); | |
bb70624e JA |
2136 | #if defined (__MSDOS__) |
2137 | putc ('\r', rl_outstream); | |
2138 | #else | |
28ef6c31 | 2139 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2140 | #endif |
726f6388 JA |
2141 | _rl_last_c_pos = 0; |
2142 | } | |
2143 | else | |
2144 | { /* delta < 0 */ | |
af32e54d CR |
2145 | #ifdef __DJGPP__ |
2146 | int row, col; | |
2147 | ||
2148 | fflush (rl_outstream); | |
2149 | ScreenGetCursor (&row, &col); | |
2150 | ScreenSetCursor (row + delta, col); | |
2151 | i = -delta; | |
2152 | #else | |
28ef6c31 | 2153 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 2154 | for (i = 0; i < -delta; i++) |
28ef6c31 | 2155 | tputs (_rl_term_up, 1, _rl_output_character_function); |
af32e54d | 2156 | #endif /* !__DJGPP__ */ |
726f6388 | 2157 | } |
bb70624e | 2158 | |
726f6388 JA |
2159 | _rl_last_v_pos = to; /* Now TO is here */ |
2160 | } | |
2161 | ||
2162 | /* Physically print C on rl_outstream. This is for functions which know | |
2163 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 2164 | int |
726f6388 JA |
2165 | rl_show_char (c) |
2166 | int c; | |
2167 | { | |
2168 | int n = 1; | |
2169 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
2170 | { | |
2171 | fprintf (rl_outstream, "M-"); | |
2172 | n += 2; | |
2173 | c = UNMETA (c); | |
2174 | } | |
2175 | ||
2176 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 2177 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 2178 | #else |
ccc6cda3 | 2179 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
2180 | #endif /* !DISPLAY_TABS */ |
2181 | { | |
2182 | fprintf (rl_outstream, "C-"); | |
2183 | n += 2; | |
ccc6cda3 | 2184 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
2185 | } |
2186 | ||
2187 | putc (c, rl_outstream); | |
2188 | fflush (rl_outstream); | |
2189 | return n; | |
2190 | } | |
2191 | ||
2192 | int | |
2193 | rl_character_len (c, pos) | |
2194 | register int c, pos; | |
2195 | { | |
2196 | unsigned char uc; | |
2197 | ||
2198 | uc = (unsigned char)c; | |
2199 | ||
2200 | if (META_CHAR (uc)) | |
2201 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
2202 | ||
2203 | if (uc == '\t') | |
2204 | { | |
2205 | #if defined (DISPLAY_TABS) | |
2206 | return (((pos | 7) + 1) - pos); | |
2207 | #else | |
2208 | return (2); | |
2209 | #endif /* !DISPLAY_TABS */ | |
2210 | } | |
2211 | ||
ccc6cda3 JA |
2212 | if (CTRL_CHAR (c) || c == RUBOUT) |
2213 | return (2); | |
2214 | ||
f73dda09 | 2215 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 | 2216 | } |
726f6388 JA |
2217 | /* How to print things in the "echo-area". The prompt is treated as a |
2218 | mini-modeline. */ | |
6e70dbff | 2219 | static int msg_saved_prompt = 0; |
726f6388 | 2220 | |
ccc6cda3 JA |
2221 | #if defined (USE_VARARGS) |
2222 | int | |
2223 | #if defined (PREFER_STDARG) | |
2224 | rl_message (const char *format, ...) | |
2225 | #else | |
726f6388 JA |
2226 | rl_message (va_alist) |
2227 | va_dcl | |
ccc6cda3 | 2228 | #endif |
726f6388 | 2229 | { |
726f6388 | 2230 | va_list args; |
ccc6cda3 JA |
2231 | #if defined (PREFER_VARARGS) |
2232 | char *format; | |
2233 | #endif | |
40647963 CR |
2234 | #if defined (HAVE_VSNPRINTF) |
2235 | int bneed; | |
2236 | #endif | |
726f6388 | 2237 | |
ccc6cda3 JA |
2238 | #if defined (PREFER_STDARG) |
2239 | va_start (args, format); | |
2240 | #else | |
726f6388 JA |
2241 | va_start (args); |
2242 | format = va_arg (args, char *); | |
ccc6cda3 JA |
2243 | #endif |
2244 | ||
40647963 CR |
2245 | if (msg_buf == 0) |
2246 | msg_buf = xmalloc (msg_bufsiz = 128); | |
2247 | ||
f73dda09 | 2248 | #if defined (HAVE_VSNPRINTF) |
40647963 CR |
2249 | bneed = vsnprintf (msg_buf, msg_bufsiz - 1, format, args); |
2250 | if (bneed >= msg_bufsiz - 1) | |
2251 | { | |
2252 | msg_bufsiz = bneed + 1; | |
2253 | msg_buf = xrealloc (msg_buf, msg_bufsiz); | |
2254 | va_end (args); | |
2255 | ||
2256 | #if defined (PREFER_STDARG) | |
2257 | va_start (args, format); | |
2258 | #else | |
2259 | va_start (args); | |
2260 | format = va_arg (args, char *); | |
2261 | #endif | |
2262 | vsnprintf (msg_buf, msg_bufsiz - 1, format, args); | |
2263 | } | |
f73dda09 | 2264 | #else |
726f6388 | 2265 | vsprintf (msg_buf, format, args); |
40647963 | 2266 | msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */ |
f73dda09 | 2267 | #endif |
726f6388 JA |
2268 | va_end (args); |
2269 | ||
6e70dbff CR |
2270 | if (saved_local_prompt == 0) |
2271 | { | |
2272 | rl_save_prompt (); | |
2273 | msg_saved_prompt = 1; | |
2274 | } | |
c84e5202 CR |
2275 | else if (local_prompt != saved_local_prompt) |
2276 | { | |
2277 | FREE (local_prompt); | |
2278 | FREE (local_prompt_prefix); | |
2279 | local_prompt = (char *)NULL; | |
2280 | } | |
726f6388 | 2281 | rl_display_prompt = msg_buf; |
6e70dbff CR |
2282 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
2283 | &prompt_last_invisible, | |
2284 | &prompt_invis_chars_first_line, | |
2285 | &prompt_physical_chars); | |
2286 | local_prompt_prefix = (char *)NULL; | |
d3ad40de | 2287 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 2288 | (*rl_redisplay_function) (); |
6e70dbff | 2289 | |
726f6388 JA |
2290 | return 0; |
2291 | } | |
ccc6cda3 JA |
2292 | #else /* !USE_VARARGS */ |
2293 | int | |
726f6388 JA |
2294 | rl_message (format, arg1, arg2) |
2295 | char *format; | |
2296 | { | |
40647963 CR |
2297 | if (msg_buf == 0) |
2298 | msg_buf = xmalloc (msg_bufsiz = 128); | |
2299 | ||
726f6388 | 2300 | sprintf (msg_buf, format, arg1, arg2); |
40647963 | 2301 | msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */ |
6e70dbff | 2302 | |
726f6388 | 2303 | rl_display_prompt = msg_buf; |
6e70dbff CR |
2304 | if (saved_local_prompt == 0) |
2305 | { | |
2306 | rl_save_prompt (); | |
2307 | msg_saved_prompt = 1; | |
2308 | } | |
c84e5202 CR |
2309 | else if (local_prompt != saved_local_prompt) |
2310 | { | |
2311 | FREE (local_prompt); | |
2312 | FREE (local_prompt_prefix); | |
2313 | local_prompt = (char *)NULL; | |
2314 | } | |
6e70dbff CR |
2315 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
2316 | &prompt_last_invisible, | |
2317 | &prompt_invis_chars_first_line, | |
2318 | &prompt_physical_chars); | |
2319 | local_prompt_prefix = (char *)NULL; | |
d3ad40de | 2320 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 2321 | (*rl_redisplay_function) (); |
6e70dbff | 2322 | |
726f6388 JA |
2323 | return 0; |
2324 | } | |
ccc6cda3 | 2325 | #endif /* !USE_VARARGS */ |
726f6388 JA |
2326 | |
2327 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 2328 | int |
726f6388 JA |
2329 | rl_clear_message () |
2330 | { | |
2331 | rl_display_prompt = rl_prompt; | |
6e70dbff CR |
2332 | if (msg_saved_prompt) |
2333 | { | |
2334 | rl_restore_prompt (); | |
2335 | msg_saved_prompt = 0; | |
2336 | } | |
ccc6cda3 | 2337 | (*rl_redisplay_function) (); |
726f6388 JA |
2338 | return 0; |
2339 | } | |
2340 | ||
ccc6cda3 | 2341 | int |
726f6388 JA |
2342 | rl_reset_line_state () |
2343 | { | |
2344 | rl_on_new_line (); | |
2345 | ||
2346 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
2347 | forced_display = 1; | |
2348 | return 0; | |
2349 | } | |
2350 | ||
ccc6cda3 | 2351 | void |
b72432fd | 2352 | rl_save_prompt () |
ccc6cda3 JA |
2353 | { |
2354 | saved_local_prompt = local_prompt; | |
2355 | saved_local_prefix = local_prompt_prefix; | |
6e70dbff | 2356 | saved_prefix_length = prompt_prefix_length; |
d3ad40de | 2357 | saved_local_length = local_prompt_len; |
28ef6c31 JA |
2358 | saved_last_invisible = prompt_last_invisible; |
2359 | saved_visible_length = prompt_visible_length; | |
d3a24ed2 | 2360 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
762a763b | 2361 | saved_physical_chars = prompt_physical_chars; |
ccc6cda3 JA |
2362 | |
2363 | local_prompt = local_prompt_prefix = (char *)0; | |
d3ad40de | 2364 | local_prompt_len = 0; |
6e70dbff | 2365 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
762a763b | 2366 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
2367 | } |
2368 | ||
2369 | void | |
b72432fd | 2370 | rl_restore_prompt () |
ccc6cda3 | 2371 | { |
28ef6c31 JA |
2372 | FREE (local_prompt); |
2373 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
2374 | |
2375 | local_prompt = saved_local_prompt; | |
2376 | local_prompt_prefix = saved_local_prefix; | |
d3ad40de | 2377 | local_prompt_len = saved_local_length; |
6e70dbff | 2378 | prompt_prefix_length = saved_prefix_length; |
28ef6c31 JA |
2379 | prompt_last_invisible = saved_last_invisible; |
2380 | prompt_visible_length = saved_visible_length; | |
d3a24ed2 | 2381 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
762a763b | 2382 | prompt_physical_chars = saved_physical_chars; |
6e70dbff CR |
2383 | |
2384 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
2385 | saved_local_prompt = saved_local_prefix = (char *)0; | |
d3ad40de | 2386 | saved_local_length = 0; |
6e70dbff CR |
2387 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; |
2388 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
ccc6cda3 JA |
2389 | } |
2390 | ||
2391 | char * | |
2392 | _rl_make_prompt_for_search (pchar) | |
2393 | int pchar; | |
2394 | { | |
2395 | int len; | |
0cc62c12 | 2396 | char *pmt, *p; |
ccc6cda3 | 2397 | |
b72432fd | 2398 | rl_save_prompt (); |
ccc6cda3 | 2399 | |
0cc62c12 CR |
2400 | /* We've saved the prompt, and can do anything with the various prompt |
2401 | strings we need before they're restored. We want the unexpanded | |
2402 | portion of the prompt string after any final newline. */ | |
2403 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; | |
2404 | if (p == 0) | |
2405 | { | |
2406 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
2407 | pmt = (char *)xmalloc (len + 2); | |
2408 | if (len) | |
2409 | strcpy (pmt, rl_prompt); | |
2410 | pmt[len] = pchar; | |
2411 | pmt[len+1] = '\0'; | |
2412 | } | |
2413 | else | |
2414 | { | |
2415 | p++; | |
2416 | len = strlen (p); | |
2417 | pmt = (char *)xmalloc (len + 2); | |
2418 | if (len) | |
2419 | strcpy (pmt, p); | |
2420 | pmt[len] = pchar; | |
2421 | pmt[len+1] = '\0'; | |
2422 | } | |
762a763b | 2423 | |
2abb7255 | 2424 | /* will be overwritten by expand_prompt, called from rl_message */ |
6e70dbff | 2425 | prompt_physical_chars = saved_physical_chars + 1; |
ccc6cda3 JA |
2426 | return pmt; |
2427 | } | |
2428 | ||
726f6388 JA |
2429 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
2430 | void | |
2431 | _rl_erase_at_end_of_line (l) | |
2432 | int l; | |
2433 | { | |
2434 | register int i; | |
2435 | ||
ccc6cda3 | 2436 | _rl_backspace (l); |
726f6388 JA |
2437 | for (i = 0; i < l; i++) |
2438 | putc (' ', rl_outstream); | |
ccc6cda3 | 2439 | _rl_backspace (l); |
726f6388 JA |
2440 | for (i = 0; i < l; i++) |
2441 | visible_line[--_rl_last_c_pos] = '\0'; | |
2442 | rl_display_fixed++; | |
2443 | } | |
2444 | ||
2445 | /* Clear to the end of the line. COUNT is the minimum | |
2446 | number of character spaces to clear, */ | |
d166f048 JA |
2447 | void |
2448 | _rl_clear_to_eol (count) | |
726f6388 JA |
2449 | int count; |
2450 | { | |
af32e54d | 2451 | #ifndef __MSDOS__ |
28ef6c31 JA |
2452 | if (_rl_term_clreol) |
2453 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
af32e54d CR |
2454 | else |
2455 | #endif | |
2456 | if (count) | |
2457 | space_to_eol (count); | |
726f6388 JA |
2458 | } |
2459 | ||
2460 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2461 | number of character spaces to clear, */ | |
2462 | static void | |
2463 | space_to_eol (count) | |
2464 | int count; | |
2465 | { | |
2466 | register int i; | |
2467 | ||
2468 | for (i = 0; i < count; i++) | |
2469 | putc (' ', rl_outstream); | |
2470 | ||
2471 | _rl_last_c_pos += count; | |
2472 | } | |
2473 | ||
d166f048 JA |
2474 | void |
2475 | _rl_clear_screen () | |
2476 | { | |
af32e54d | 2477 | #ifndef __DJGPP__ |
28ef6c31 JA |
2478 | if (_rl_term_clrpag) |
2479 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 2480 | else |
28ef6c31 | 2481 | rl_crlf (); |
af32e54d CR |
2482 | #else |
2483 | ScreenClear (); | |
2484 | ScreenSetCursor (0, 0); | |
2485 | #endif /* __DJGPP__ */ | |
d166f048 JA |
2486 | } |
2487 | ||
7117c2d2 | 2488 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 2489 | static void |
7117c2d2 | 2490 | insert_some_chars (string, count, col) |
726f6388 | 2491 | char *string; |
7117c2d2 | 2492 | int count, col; |
726f6388 | 2493 | { |
73a146be | 2494 | open_some_spaces (col); |
9607141c | 2495 | _rl_output_some_chars (string, count); |
73a146be CR |
2496 | } |
2497 | ||
2498 | /* Insert COL spaces, keeping the cursor at the same position. We follow the | |
2499 | ncurses documentation and use either im/ei with explicit spaces, or IC/ic | |
2500 | by itself. We assume there will either be ei or we don't need to use it. */ | |
2501 | static void | |
2502 | open_some_spaces (col) | |
2503 | int col; | |
2504 | { | |
2505 | #if !defined (__MSDOS__) && !defined (__MINGW32__) | |
2506 | char *buffer; | |
2507 | register int i; | |
7117c2d2 | 2508 | |
726f6388 | 2509 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2510 | if (_rl_term_IC) |
726f6388 | 2511 | { |
7117c2d2 | 2512 | buffer = tgoto (_rl_term_IC, 0, col); |
726f6388 | 2513 | tputs (buffer, 1, _rl_output_character_function); |
726f6388 | 2514 | } |
73a146be | 2515 | else if (_rl_term_im && *_rl_term_im) |
726f6388 | 2516 | { |
73a146be CR |
2517 | tputs (_rl_term_im, 1, _rl_output_character_function); |
2518 | /* just output the desired number of spaces */ | |
2519 | for (i = col; i--; ) | |
2520 | _rl_output_character_function (' '); | |
2521 | /* If there is a string to turn off insert mode, use it now. */ | |
28ef6c31 JA |
2522 | if (_rl_term_ei && *_rl_term_ei) |
2523 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
73a146be CR |
2524 | /* and move back the right number of spaces */ |
2525 | _rl_backspace (col); | |
2526 | } | |
2527 | else if (_rl_term_ic && *_rl_term_ic) | |
2528 | { | |
2529 | /* If there is a special command for inserting characters, then | |
2530 | use that first to open up the space. */ | |
2531 | for (i = col; i--; ) | |
2532 | tputs (_rl_term_ic, 1, _rl_output_character_function); | |
726f6388 | 2533 | } |
73a146be | 2534 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
726f6388 JA |
2535 | } |
2536 | ||
2537 | /* Delete COUNT characters from the display line. */ | |
2538 | static void | |
2539 | delete_chars (count) | |
2540 | int count; | |
2541 | { | |
28ef6c31 | 2542 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2543 | return; |
2544 | ||
9607141c | 2545 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
28ef6c31 | 2546 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2547 | { |
ccc6cda3 | 2548 | char *buffer; |
28ef6c31 | 2549 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2550 | tputs (buffer, count, _rl_output_character_function); |
2551 | } | |
2552 | else | |
2553 | { | |
28ef6c31 | 2554 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2555 | while (count--) |
28ef6c31 | 2556 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2557 | } |
9607141c | 2558 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
726f6388 JA |
2559 | } |
2560 | ||
2561 | void | |
2562 | _rl_update_final () | |
2563 | { | |
2564 | int full_lines; | |
2565 | ||
2566 | full_lines = 0; | |
ccc6cda3 JA |
2567 | /* If the cursor is the only thing on an otherwise-blank last line, |
2568 | compensate so we don't print an extra CRLF. */ | |
2569 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2570 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2571 | { |
2572 | _rl_vis_botlin--; | |
2573 | full_lines = 1; | |
2574 | } | |
2575 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2576 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2577 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2578 | { |
726f6388 | 2579 | char *last_line; |
7117c2d2 | 2580 | |
bb70624e | 2581 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
d3ad40de CR |
2582 | cpos_buffer_position = -1; /* don't know where we are in buffer */ |
2583 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */ | |
d166f048 | 2584 | _rl_clear_to_eol (0); |
28ef6c31 | 2585 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2586 | } |
2587 | _rl_vis_botlin = 0; | |
28ef6c31 | 2588 | rl_crlf (); |
726f6388 JA |
2589 | fflush (rl_outstream); |
2590 | rl_display_fixed++; | |
2591 | } | |
2592 | ||
2593 | /* Move to the start of the current line. */ | |
2594 | static void | |
2595 | cr () | |
2596 | { | |
28ef6c31 | 2597 | if (_rl_term_cr) |
726f6388 | 2598 | { |
bb70624e JA |
2599 | #if defined (__MSDOS__) |
2600 | putc ('\r', rl_outstream); | |
2601 | #else | |
28ef6c31 | 2602 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2603 | #endif |
726f6388 JA |
2604 | _rl_last_c_pos = 0; |
2605 | } | |
2606 | } | |
2607 | ||
bb70624e JA |
2608 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2609 | terminal escape sequences. Called with the cursor at column 0 of the | |
2610 | line to draw the prompt on. */ | |
2611 | static void | |
2612 | redraw_prompt (t) | |
2613 | char *t; | |
2614 | { | |
6e70dbff | 2615 | char *oldp; |
bb70624e | 2616 | |
bb70624e | 2617 | oldp = rl_display_prompt; |
6e70dbff | 2618 | rl_save_prompt (); |
bb70624e JA |
2619 | |
2620 | rl_display_prompt = t; | |
28ef6c31 JA |
2621 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2622 | &prompt_last_invisible, | |
43cdcad8 CR |
2623 | &prompt_invis_chars_first_line, |
2624 | &prompt_physical_chars); | |
bb70624e | 2625 | local_prompt_prefix = (char *)NULL; |
d3ad40de | 2626 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
6e70dbff | 2627 | |
bb70624e JA |
2628 | rl_forced_update_display (); |
2629 | ||
2630 | rl_display_prompt = oldp; | |
6e70dbff | 2631 | rl_restore_prompt(); |
bb70624e JA |
2632 | } |
2633 | ||
726f6388 JA |
2634 | /* Redisplay the current line after a SIGWINCH is received. */ |
2635 | void | |
2636 | _rl_redisplay_after_sigwinch () | |
2637 | { | |
bb70624e | 2638 | char *t; |
726f6388 | 2639 | |
d3ad40de CR |
2640 | /* Clear the last line (assuming that the screen size change will result in |
2641 | either more or fewer characters on that line only) and put the cursor at | |
2642 | column 0. Make sure the right thing happens if we have wrapped to a new | |
2643 | screen line. */ | |
28ef6c31 | 2644 | if (_rl_term_cr) |
726f6388 | 2645 | { |
d3ad40de CR |
2646 | _rl_move_vert (_rl_vis_botlin); |
2647 | ||
bb70624e JA |
2648 | #if defined (__MSDOS__) |
2649 | putc ('\r', rl_outstream); | |
2650 | #else | |
28ef6c31 | 2651 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2652 | #endif |
726f6388 | 2653 | _rl_last_c_pos = 0; |
bb70624e | 2654 | #if defined (__MSDOS__) |
28ef6c31 | 2655 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2656 | putc ('\r', rl_outstream); |
2657 | #else | |
28ef6c31 JA |
2658 | if (_rl_term_clreol) |
2659 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2660 | else |
2661 | { | |
28ef6c31 JA |
2662 | space_to_eol (_rl_screenwidth); |
2663 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2664 | } |
bb70624e | 2665 | #endif |
726f6388 JA |
2666 | if (_rl_last_v_pos > 0) |
2667 | _rl_move_vert (0); | |
2668 | } | |
2669 | else | |
28ef6c31 | 2670 | rl_crlf (); |
726f6388 JA |
2671 | |
2672 | /* Redraw only the last line of a multi-line prompt. */ | |
2673 | t = strrchr (rl_display_prompt, '\n'); | |
2674 | if (t) | |
bb70624e | 2675 | redraw_prompt (++t); |
726f6388 JA |
2676 | else |
2677 | rl_forced_update_display (); | |
2678 | } | |
ccc6cda3 JA |
2679 | |
2680 | void | |
2681 | _rl_clean_up_for_exit () | |
2682 | { | |
6fbe7620 | 2683 | if (_rl_echoing_p) |
ccc6cda3 | 2684 | { |
c28fcb7e CR |
2685 | if (_rl_vis_botlin > 0) /* minor optimization plus bug fix */ |
2686 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 JA |
2687 | _rl_vis_botlin = 0; |
2688 | fflush (rl_outstream); | |
b72432fd | 2689 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2690 | } |
2691 | } | |
b72432fd JA |
2692 | |
2693 | void | |
2694 | _rl_erase_entire_line () | |
2695 | { | |
2696 | cr (); | |
2697 | _rl_clear_to_eol (0); | |
2698 | cr (); | |
2699 | fflush (rl_outstream); | |
2700 | } | |
bb70624e | 2701 | |
0d9b018b CR |
2702 | void |
2703 | _rl_ttyflush () | |
2704 | { | |
2705 | fflush (rl_outstream); | |
2706 | } | |
2707 | ||
bb70624e JA |
2708 | /* return the `current display line' of the cursor -- the number of lines to |
2709 | move up to get to the first screen line of the current readline line. */ | |
2710 | int | |
2711 | _rl_current_display_line () | |
2712 | { | |
2713 | int ret, nleft; | |
2714 | ||
2715 | /* Find out whether or not there might be invisible characters in the | |
2716 | editing buffer. */ | |
2717 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2718 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2719 | else |
28ef6c31 | 2720 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2721 | |
2722 | if (nleft > 0) | |
28ef6c31 | 2723 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2724 | else |
2725 | ret = 0; | |
2726 | ||
2727 | return ret; | |
2728 | } | |
7117c2d2 JA |
2729 | |
2730 | #if defined (HANDLE_MULTIBYTE) | |
2731 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2732 | In the case of multibyte characters with stateful encoding, we have to | |
2733 | scan from the beginning of the string to take the state into account. */ | |
2734 | static int | |
82a5df63 | 2735 | _rl_col_width (str, start, end, flags) |
d3a24ed2 | 2736 | const char *str; |
82a5df63 | 2737 | int start, end, flags; |
7117c2d2 JA |
2738 | { |
2739 | wchar_t wc; | |
d3ad40de | 2740 | mbstate_t ps; |
7117c2d2 JA |
2741 | int tmp, point, width, max; |
2742 | ||
2743 | if (end <= start) | |
2744 | return 0; | |
d3ad40de | 2745 | if (MB_CUR_MAX == 1 || rl_byte_oriented) |
c7e43312 | 2746 | /* this can happen in some cases where it's inconvenient to check */ |
d3ad40de | 2747 | return (end - start); |
d3ad40de CR |
2748 | |
2749 | memset (&ps, 0, sizeof (mbstate_t)); | |
5cef52a7 | 2750 | |
7117c2d2 JA |
2751 | point = 0; |
2752 | max = end; | |
2753 | ||
dfc21851 CR |
2754 | /* Try to short-circuit common cases. The adjustment to remove wrap_offset |
2755 | is done by the caller. */ | |
2756 | /* 1. prompt string */ | |
82a5df63 CR |
2757 | if (flags && start == 0 && end == local_prompt_len && memcmp (str, local_prompt, local_prompt_len) == 0) |
2758 | return (prompt_physical_chars + wrap_offset); | |
dfc21851 | 2759 | /* 2. prompt string + line contents */ |
82a5df63 | 2760 | else if (flags && start == 0 && local_prompt_len > 0 && end > local_prompt_len && local_prompt && memcmp (str, local_prompt, local_prompt_len) == 0) |
dfc21851 | 2761 | { |
82a5df63 | 2762 | tmp = prompt_physical_chars + wrap_offset; |
dfc21851 | 2763 | /* XXX - try to call ourselves recursively with non-prompt portion */ |
82a5df63 | 2764 | tmp += _rl_col_width (str, local_prompt_len, end, flags); |
dfc21851 CR |
2765 | return (tmp); |
2766 | } | |
2767 | ||
7117c2d2 JA |
2768 | while (point < start) |
2769 | { | |
2770 | tmp = mbrlen (str + point, max, &ps); | |
d3a24ed2 | 2771 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2772 | { |
2773 | /* In this case, the bytes are invalid or too short to compose a | |
2774 | multibyte character, so we assume that the first byte represents | |
2775 | a single character. */ | |
2776 | point++; | |
2777 | max--; | |
2778 | ||
2779 | /* Clear the state of the byte sequence, because in this case the | |
2780 | effect of mbstate is undefined. */ | |
2781 | memset (&ps, 0, sizeof (mbstate_t)); | |
2782 | } | |
d3a24ed2 | 2783 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2784 | break; /* Found '\0' */ |
7117c2d2 JA |
2785 | else |
2786 | { | |
2787 | point += tmp; | |
2788 | max -= tmp; | |
2789 | } | |
2790 | } | |
2791 | ||
2792 | /* If START is not a byte that starts a character, then POINT will be | |
2793 | greater than START. In this case, assume that (POINT - START) gives | |
2794 | a byte count that is the number of columns of difference. */ | |
2795 | width = point - start; | |
2796 | ||
2797 | while (point < end) | |
2798 | { | |
2799 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
d3a24ed2 | 2800 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2801 | { |
2802 | /* In this case, the bytes are invalid or too short to compose a | |
2803 | multibyte character, so we assume that the first byte represents | |
2804 | a single character. */ | |
2805 | point++; | |
2806 | max--; | |
2807 | ||
2808 | /* and assume that the byte occupies a single column. */ | |
2809 | width++; | |
2810 | ||
2811 | /* Clear the state of the byte sequence, because in this case the | |
2812 | effect of mbstate is undefined. */ | |
2813 | memset (&ps, 0, sizeof (mbstate_t)); | |
2814 | } | |
d3a24ed2 | 2815 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2816 | break; /* Found '\0' */ |
7117c2d2 JA |
2817 | else |
2818 | { | |
2819 | point += tmp; | |
2820 | max -= tmp; | |
22818c14 | 2821 | tmp = WCWIDTH(wc); |
7117c2d2 JA |
2822 | width += (tmp >= 0) ? tmp : 1; |
2823 | } | |
2824 | } | |
2825 | ||
2826 | width += point - end; | |
2827 | ||
2828 | return width; | |
2829 | } | |
2830 | #endif /* HANDLE_MULTIBYTE */ |