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Commit | Line | Data |
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726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
cc87ba64 | 3 | /* Copyright (C) 1987-2005 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of the GNU Readline Library, a library for | |
6 | reading lines of text with interactive input and history editing. | |
7 | ||
8 | The GNU Readline Library is free software; you can redistribute it | |
9 | and/or modify it under the terms of the GNU General Public License | |
bb70624e | 10 | as published by the Free Software Foundation; either version 2, or |
726f6388 JA |
11 | (at your option) any later version. |
12 | ||
13 | The GNU Readline Library is distributed in the hope that it will be | |
14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | The GNU General Public License is often shipped with GNU software, and | |
19 | is generally kept in a file called COPYING or LICENSE. If you do not | |
20 | have a copy of the license, write to the Free Software Foundation, | |
bb70624e | 21 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 JA |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
ccc6cda3 | 25 | # include <config.h> |
726f6388 JA |
26 | #endif |
27 | ||
726f6388 JA |
28 | #include <sys/types.h> |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
d166f048 JA |
34 | #include "posixstat.h" |
35 | ||
726f6388 JA |
36 | #if defined (HAVE_STDLIB_H) |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
d166f048 JA |
42 | #include <stdio.h> |
43 | ||
726f6388 JA |
44 | /* System-specific feature definitions and include files. */ |
45 | #include "rldefs.h" | |
7117c2d2 | 46 | #include "rlmbutil.h" |
726f6388 | 47 | |
ccc6cda3 JA |
48 | /* Termcap library stuff. */ |
49 | #include "tcap.h" | |
50 | ||
726f6388 JA |
51 | /* Some standard library routines. */ |
52 | #include "readline.h" | |
53 | #include "history.h" | |
54 | ||
bb70624e JA |
55 | #include "rlprivate.h" |
56 | #include "xmalloc.h" | |
57 | ||
726f6388 JA |
58 | #if !defined (strchr) && !defined (__STDC__) |
59 | extern char *strchr (), *strrchr (); | |
60 | #endif /* !strchr && !__STDC__ */ | |
61 | ||
bb70624e | 62 | #if defined (HACK_TERMCAP_MOTION) |
28ef6c31 | 63 | extern char *_rl_term_forward_char; |
cce855bc | 64 | #endif |
726f6388 | 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)); |
f73dda09 | 70 | static void cr PARAMS((void)); |
ccc6cda3 | 71 | |
7117c2d2 | 72 | #if defined (HANDLE_MULTIBYTE) |
d3a24ed2 | 73 | static int _rl_col_width PARAMS((const char *, int, int)); |
7117c2d2 JA |
74 | static int *_rl_wrapped_line; |
75 | #else | |
76 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
77 | #endif | |
78 | ||
ccc6cda3 | 79 | static int *inv_lbreaks, *vis_lbreaks; |
bb70624e | 80 | static int inv_lbsize, vis_lbsize; |
726f6388 JA |
81 | |
82 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
83 | by backing up or outputting a carriage return and moving forward. */ | |
84 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
85 | ||
86 | /* **************************************************************** */ | |
87 | /* */ | |
88 | /* Display stuff */ | |
89 | /* */ | |
90 | /* **************************************************************** */ | |
91 | ||
92 | /* This is the stuff that is hard for me. I never seem to write good | |
93 | display routines in C. Let's see how I do this time. */ | |
94 | ||
95 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
96 | the problems of input lines longer than the screen width. | |
97 | ||
98 | update_line and the code that calls it makes a multiple line, | |
99 | automatically wrapping line update. Careful attention needs | |
100 | to be paid to the vertical position variables. */ | |
101 | ||
102 | /* Keep two buffers; one which reflects the current contents of the | |
103 | screen, and the other to draw what we think the new contents should | |
104 | be. Then compare the buffers, and make whatever changes to the | |
105 | screen itself that we should. Finally, make the buffer that we | |
106 | just drew into be the one which reflects the current contents of the | |
107 | screen, and place the cursor where it belongs. | |
108 | ||
109 | Commands that want to can fix the display themselves, and then let | |
110 | this function know that the display has been fixed by setting the | |
111 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
112 | ||
ccc6cda3 | 113 | /* Application-specific redisplay function. */ |
28ef6c31 | 114 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 115 | |
726f6388 JA |
116 | /* Global variables declared here. */ |
117 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
118 | int rl_display_fixed = 0; | |
119 | ||
ccc6cda3 | 120 | int _rl_suppress_redisplay = 0; |
798a67db | 121 | int _rl_want_redisplay = 0; |
ccc6cda3 | 122 | |
726f6388 JA |
123 | /* The stuff that gets printed out before the actual text of the line. |
124 | This is usually pointing to rl_prompt. */ | |
125 | char *rl_display_prompt = (char *)NULL; | |
126 | ||
127 | /* Pseudo-global variables declared here. */ | |
177d51f7 | 128 | |
726f6388 | 129 | /* The visible cursor position. If you print some text, adjust this. */ |
177d51f7 CR |
130 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
131 | supporting multibyte characters, and an absolute cursor position when | |
132 | in such a locale. This is an artifact of the donated multibyte support. | |
133 | Care must be taken when modifying its value. */ | |
726f6388 JA |
134 | int _rl_last_c_pos = 0; |
135 | int _rl_last_v_pos = 0; | |
136 | ||
5c26afb8 CR |
137 | static int cpos_adjusted; |
138 | ||
726f6388 JA |
139 | /* Number of lines currently on screen minus 1. */ |
140 | int _rl_vis_botlin = 0; | |
141 | ||
142 | /* Variables used only in this file. */ | |
143 | /* The last left edge of text that was displayed. This is used when | |
144 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 145 | static int last_lmargin; |
726f6388 JA |
146 | |
147 | /* The line display buffers. One is the line currently displayed on | |
148 | the screen. The other is the line about to be displayed. */ | |
149 | static char *visible_line = (char *)NULL; | |
150 | static char *invisible_line = (char *)NULL; | |
151 | ||
152 | /* A buffer for `modeline' messages. */ | |
153 | static char msg_buf[128]; | |
154 | ||
155 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 156 | static int forced_display; |
726f6388 JA |
157 | |
158 | /* Default and initial buffer size. Can grow. */ | |
159 | static int line_size = 1024; | |
160 | ||
28ef6c31 JA |
161 | /* Variables to keep track of the expanded prompt string, which may |
162 | include invisible characters. */ | |
163 | ||
726f6388 | 164 | static char *local_prompt, *local_prompt_prefix; |
28ef6c31 | 165 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
166 | |
167 | /* The number of invisible characters in the line currently being | |
168 | displayed on the screen. */ | |
ccc6cda3 JA |
169 | static int visible_wrap_offset; |
170 | ||
28ef6c31 JA |
171 | /* The number of invisible characters in the prompt string. Static so it |
172 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
173 | static int wrap_offset; |
174 | ||
28ef6c31 JA |
175 | /* The index of the last invisible character in the prompt string. */ |
176 | static int prompt_last_invisible; | |
726f6388 JA |
177 | |
178 | /* The length (buffer offset) of the first line of the last (possibly | |
179 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 180 | static int visible_first_line_len; |
726f6388 | 181 | |
28ef6c31 JA |
182 | /* Number of invisible characters on the first physical line of the prompt. |
183 | Only valid when the number of physical characters in the prompt exceeds | |
184 | (or is equal to) _rl_screenwidth. */ | |
185 | static int prompt_invis_chars_first_line; | |
186 | ||
187 | static int prompt_last_screen_line; | |
188 | ||
43cdcad8 CR |
189 | static int prompt_physical_chars; |
190 | ||
6e70dbff CR |
191 | /* Variables to save and restore prompt and display information. */ |
192 | ||
193 | /* These are getting numerous enough that it's time to create a struct. */ | |
194 | ||
195 | static char *saved_local_prompt; | |
196 | static char *saved_local_prefix; | |
197 | static int saved_last_invisible; | |
198 | static int saved_visible_length; | |
199 | static int saved_prefix_length; | |
200 | static int saved_invis_chars_first_line; | |
201 | static int saved_physical_chars; | |
202 | ||
726f6388 JA |
203 | /* Expand the prompt string S and return the number of visible |
204 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 205 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
206 | index of the last invisible character in the returned string. NIFLP, |
207 | if non-zero, is a place to store the number of invisible characters in | |
43cdcad8 CR |
208 | the first prompt line. The previous are used as byte counts -- indexes |
209 | into a character buffer. */ | |
726f6388 JA |
210 | |
211 | /* Current implementation: | |
212 | \001 (^A) start non-visible characters | |
213 | \002 (^B) end non-visible characters | |
214 | all characters except \001 and \002 (following a \001) are copied to | |
215 | the returned string; all characters except those between \001 and | |
216 | \002 are assumed to be `visible'. */ | |
217 | ||
218 | static char * | |
43cdcad8 | 219 | expand_prompt (pmt, lp, lip, niflp, vlp) |
726f6388 | 220 | char *pmt; |
43cdcad8 | 221 | int *lp, *lip, *niflp, *vlp; |
726f6388 | 222 | { |
5e4a95c7 | 223 | char *r, *ret, *p, *igstart; |
b954488b | 224 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
726f6388 JA |
225 | |
226 | /* Short-circuit if we can. */ | |
43cdcad8 | 227 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 JA |
228 | { |
229 | r = savestring (pmt); | |
230 | if (lp) | |
231 | *lp = strlen (r); | |
43cdcad8 CR |
232 | if (lip) |
233 | *lip = 0; | |
234 | if (niflp) | |
235 | *niflp = 0; | |
236 | if (vlp) | |
237 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
238 | return r; |
239 | } | |
240 | ||
ccc6cda3 | 241 | l = strlen (pmt); |
f73dda09 | 242 | r = ret = (char *)xmalloc (l + 1); |
28ef6c31 JA |
243 | |
244 | invfl = 0; /* invisible chars in first line of prompt */ | |
b954488b | 245 | invflset = 0; /* we only want to set invfl once */ |
28ef6c31 | 246 | |
5e4a95c7 | 247 | igstart = -1; |
43cdcad8 | 248 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
726f6388 JA |
249 | { |
250 | /* This code strips the invisible character string markers | |
251 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
5e4a95c7 | 252 | if (*p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */ |
726f6388 | 253 | { |
5e4a95c7 CR |
254 | ignoring = 1; |
255 | igstart = p; | |
726f6388 JA |
256 | continue; |
257 | } | |
258 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
259 | { | |
260 | ignoring = 0; | |
1569c106 CR |
261 | if (p[-1] != RL_PROMPT_START_IGNORE) |
262 | last = r - ret - 1; | |
726f6388 JA |
263 | continue; |
264 | } | |
265 | else | |
266 | { | |
43cdcad8 CR |
267 | #if defined (HANDLE_MULTIBYTE) |
268 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
269 | { | |
270 | pind = p - pmt; | |
271 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
272 | l = ind - pind; | |
273 | while (l--) | |
274 | *r++ = *p++; | |
275 | if (!ignoring) | |
37c41ab1 CR |
276 | { |
277 | rl += ind - pind; | |
278 | physchars += _rl_col_width (pmt, pind, ind); | |
279 | } | |
43cdcad8 CR |
280 | else |
281 | ninvis += ind - pind; | |
282 | p--; /* compensate for later increment */ | |
283 | } | |
28ef6c31 | 284 | else |
43cdcad8 CR |
285 | #endif |
286 | { | |
287 | *r++ = *p; | |
288 | if (!ignoring) | |
37c41ab1 CR |
289 | { |
290 | rl++; /* visible length byte counter */ | |
291 | physchars++; | |
292 | } | |
43cdcad8 CR |
293 | else |
294 | ninvis++; /* invisible chars byte counter */ | |
295 | } | |
296 | ||
b954488b CR |
297 | if (invflset == 0 && rl >= _rl_screenwidth) |
298 | { | |
299 | invfl = ninvis; | |
300 | invflset = 1; | |
301 | } | |
726f6388 JA |
302 | } |
303 | } | |
304 | ||
28ef6c31 JA |
305 | if (rl < _rl_screenwidth) |
306 | invfl = ninvis; | |
307 | ||
726f6388 JA |
308 | *r = '\0'; |
309 | if (lp) | |
310 | *lp = rl; | |
ccc6cda3 JA |
311 | if (lip) |
312 | *lip = last; | |
28ef6c31 JA |
313 | if (niflp) |
314 | *niflp = invfl; | |
43cdcad8 CR |
315 | if (vlp) |
316 | *vlp = physchars; | |
726f6388 JA |
317 | return ret; |
318 | } | |
319 | ||
bb70624e JA |
320 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
321 | PMT and return the rest of PMT. */ | |
322 | char * | |
323 | _rl_strip_prompt (pmt) | |
324 | char *pmt; | |
325 | { | |
326 | char *ret; | |
327 | ||
43cdcad8 | 328 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
329 | return ret; |
330 | } | |
331 | ||
726f6388 JA |
332 | /* |
333 | * Expand the prompt string into the various display components, if | |
334 | * necessary. | |
335 | * | |
336 | * local_prompt = expanded last line of string in rl_display_prompt | |
337 | * (portion after the final newline) | |
338 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
339 | * expanded via expand_prompt | |
28ef6c31 JA |
340 | * prompt_visible_length = number of visible characters in local_prompt |
341 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
342 | * |
343 | * This function is called once per call to readline(). It may also be | |
344 | * called arbitrarily to expand the primary prompt. | |
345 | * | |
346 | * The return value is the number of visible characters on the last line | |
347 | * of the (possibly multi-line) prompt. | |
348 | */ | |
349 | int | |
350 | rl_expand_prompt (prompt) | |
351 | char *prompt; | |
352 | { | |
353 | char *p, *t; | |
354 | int c; | |
355 | ||
356 | /* Clear out any saved values. */ | |
28ef6c31 JA |
357 | FREE (local_prompt); |
358 | FREE (local_prompt_prefix); | |
359 | ||
726f6388 | 360 | local_prompt = local_prompt_prefix = (char *)0; |
ec2199bd CR |
361 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
362 | prompt_visible_length = prompt_physical_chars = 0; | |
726f6388 | 363 | |
ccc6cda3 | 364 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
365 | return (0); |
366 | ||
367 | p = strrchr (prompt, '\n'); | |
368 | if (!p) | |
369 | { | |
28ef6c31 JA |
370 | /* The prompt is only one logical line, though it might wrap. */ |
371 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
372 | &prompt_last_invisible, | |
43cdcad8 CR |
373 | &prompt_invis_chars_first_line, |
374 | &prompt_physical_chars); | |
726f6388 | 375 | local_prompt_prefix = (char *)0; |
28ef6c31 | 376 | return (prompt_visible_length); |
726f6388 JA |
377 | } |
378 | else | |
379 | { | |
380 | /* The prompt spans multiple lines. */ | |
381 | t = ++p; | |
28ef6c31 JA |
382 | local_prompt = expand_prompt (p, &prompt_visible_length, |
383 | &prompt_last_invisible, | |
43cdcad8 | 384 | (int *)NULL, |
e6e3b444 | 385 | &prompt_physical_chars); |
726f6388 JA |
386 | c = *t; *t = '\0'; |
387 | /* The portion of the prompt string up to and including the | |
388 | final newline is now null-terminated. */ | |
28ef6c31 JA |
389 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
390 | (int *)NULL, | |
43cdcad8 | 391 | &prompt_invis_chars_first_line, |
e6e3b444 | 392 | (int *)NULL); |
726f6388 | 393 | *t = c; |
28ef6c31 | 394 | return (prompt_prefix_length); |
726f6388 JA |
395 | } |
396 | } | |
397 | ||
bb70624e JA |
398 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
399 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
400 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
401 | increased. If the lines have already been allocated, this ensures that | |
402 | they can hold at least MINSIZE characters. */ | |
403 | static void | |
404 | init_line_structures (minsize) | |
405 | int minsize; | |
406 | { | |
407 | register int n; | |
408 | ||
409 | if (invisible_line == 0) /* initialize it */ | |
410 | { | |
411 | if (line_size < minsize) | |
412 | line_size = minsize; | |
f73dda09 JA |
413 | visible_line = (char *)xmalloc (line_size); |
414 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
415 | } |
416 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
417 | { | |
418 | line_size *= 2; | |
419 | if (line_size < minsize) | |
420 | line_size = minsize; | |
f73dda09 JA |
421 | visible_line = (char *)xrealloc (visible_line, line_size); |
422 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
423 | } |
424 | ||
425 | for (n = minsize; n < line_size; n++) | |
426 | { | |
427 | visible_line[n] = 0; | |
428 | invisible_line[n] = 1; | |
429 | } | |
430 | ||
431 | if (vis_lbreaks == 0) | |
432 | { | |
433 | /* should be enough. */ | |
434 | inv_lbsize = vis_lbsize = 256; | |
435 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
436 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
7117c2d2 JA |
437 | #if defined (HANDLE_MULTIBYTE) |
438 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
439 | #endif | |
bb70624e JA |
440 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
441 | } | |
442 | } | |
443 | ||
726f6388 JA |
444 | /* Basic redisplay algorithm. */ |
445 | void | |
446 | rl_redisplay () | |
447 | { | |
ccc6cda3 JA |
448 | register int in, out, c, linenum, cursor_linenum; |
449 | register char *line; | |
28089d04 | 450 | int c_pos, inv_botlin, lb_botlin, lb_linenum, o_cpos; |
37c41ab1 | 451 | int newlines, lpos, temp, modmark, n0, num; |
726f6388 | 452 | char *prompt_this_line; |
7117c2d2 JA |
453 | #if defined (HANDLE_MULTIBYTE) |
454 | wchar_t wc; | |
455 | size_t wc_bytes; | |
456 | int wc_width; | |
457 | mbstate_t ps; | |
458 | int _rl_wrapped_multicolumn = 0; | |
459 | #endif | |
726f6388 JA |
460 | |
461 | if (!readline_echoing_p) | |
462 | return; | |
463 | ||
464 | if (!rl_display_prompt) | |
465 | rl_display_prompt = ""; | |
466 | ||
055a1bf5 | 467 | if (invisible_line == 0 || vis_lbreaks == 0) |
726f6388 | 468 | { |
bb70624e | 469 | init_line_structures (0); |
726f6388 JA |
470 | rl_on_new_line (); |
471 | } | |
472 | ||
473 | /* Draw the line into the buffer. */ | |
474 | c_pos = -1; | |
475 | ||
ccc6cda3 JA |
476 | line = invisible_line; |
477 | out = inv_botlin = 0; | |
478 | ||
726f6388 JA |
479 | /* Mark the line as modified or not. We only do this for history |
480 | lines. */ | |
43cdcad8 | 481 | modmark = 0; |
726f6388 JA |
482 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
483 | { | |
484 | line[out++] = '*'; | |
485 | line[out] = '\0'; | |
43cdcad8 | 486 | modmark = 1; |
726f6388 JA |
487 | } |
488 | ||
489 | /* If someone thought that the redisplay was handled, but the currently | |
490 | visible line has a different modification state than the one about | |
491 | to become visible, then correct the caller's misconception. */ | |
492 | if (visible_line[0] != invisible_line[0]) | |
493 | rl_display_fixed = 0; | |
494 | ||
495 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
496 | one passed to readline()), use the values we have already expanded. | |
497 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
498 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 499 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 JA |
500 | { |
501 | int local_len = local_prompt ? strlen (local_prompt) : 0; | |
502 | if (local_prompt_prefix && forced_display) | |
503 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
504 | ||
505 | if (local_len > 0) | |
ccc6cda3 | 506 | { |
b72432fd JA |
507 | temp = local_len + out + 2; |
508 | if (temp >= line_size) | |
509 | { | |
510 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
511 | visible_line = (char *)xrealloc (visible_line, line_size); |
512 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 513 | } |
ccc6cda3 JA |
514 | strncpy (line + out, local_prompt, local_len); |
515 | out += local_len; | |
516 | } | |
726f6388 | 517 | line[out] = '\0'; |
28ef6c31 | 518 | wrap_offset = local_len - prompt_visible_length; |
726f6388 JA |
519 | } |
520 | else | |
521 | { | |
522 | int pmtlen; | |
523 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
524 | if (!prompt_this_line) | |
525 | prompt_this_line = rl_display_prompt; | |
526 | else | |
527 | { | |
528 | prompt_this_line++; | |
bb70624e | 529 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 530 | if (forced_display) |
ccc6cda3 | 531 | { |
bb70624e | 532 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
533 | /* Make sure we are at column zero even after a newline, |
534 | regardless of the state of terminal output processing. */ | |
bb70624e | 535 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
536 | cr (); |
537 | } | |
726f6388 JA |
538 | } |
539 | ||
762a763b | 540 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
541 | temp = pmtlen + out + 2; |
542 | if (temp >= line_size) | |
543 | { | |
544 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
545 | visible_line = (char *)xrealloc (visible_line, line_size); |
546 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 547 | } |
726f6388 JA |
548 | strncpy (line + out, prompt_this_line, pmtlen); |
549 | out += pmtlen; | |
550 | line[out] = '\0'; | |
28ef6c31 | 551 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
552 | } |
553 | ||
bb70624e JA |
554 | #define CHECK_INV_LBREAKS() \ |
555 | do { \ | |
556 | if (newlines >= (inv_lbsize - 2)) \ | |
557 | { \ | |
558 | inv_lbsize *= 2; \ | |
559 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
560 | } \ | |
561 | } while (0) | |
7117c2d2 JA |
562 | |
563 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
564 | #define CHECK_LPOS() \ |
565 | do { \ | |
b72432fd | 566 | lpos++; \ |
28ef6c31 | 567 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 568 | { \ |
bb70624e JA |
569 | if (newlines >= (inv_lbsize - 2)) \ |
570 | { \ | |
571 | inv_lbsize *= 2; \ | |
572 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
7117c2d2 | 573 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
bb70624e | 574 | } \ |
b72432fd | 575 | inv_lbreaks[++newlines] = out; \ |
7117c2d2 | 576 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
b72432fd JA |
577 | lpos = 0; \ |
578 | } \ | |
ccc6cda3 | 579 | } while (0) |
7117c2d2 JA |
580 | #else |
581 | #define CHECK_LPOS() \ | |
582 | do { \ | |
583 | lpos++; \ | |
584 | if (lpos >= _rl_screenwidth) \ | |
585 | { \ | |
586 | if (newlines >= (inv_lbsize - 2)) \ | |
587 | { \ | |
588 | inv_lbsize *= 2; \ | |
589 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
590 | } \ | |
591 | inv_lbreaks[++newlines] = out; \ | |
592 | lpos = 0; \ | |
593 | } \ | |
594 | } while (0) | |
595 | #endif | |
ccc6cda3 JA |
596 | |
597 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
598 | inv_lbreaks[newlines = 0] = 0; | |
43cdcad8 | 599 | #if 0 |
d166f048 | 600 | lpos = out - wrap_offset; |
43cdcad8 CR |
601 | #else |
602 | lpos = prompt_physical_chars + modmark; | |
603 | #endif | |
604 | ||
7117c2d2 JA |
605 | #if defined (HANDLE_MULTIBYTE) |
606 | memset (_rl_wrapped_line, 0, vis_lbsize); | |
37c41ab1 | 607 | num = 0; |
7117c2d2 | 608 | #endif |
d166f048 | 609 | |
28ef6c31 JA |
610 | /* prompt_invis_chars_first_line is the number of invisible characters in |
611 | the first physical line of the prompt. | |
612 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
613 | chars on the second line. */ | |
614 | ||
615 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 616 | contents of the command line? */ |
28ef6c31 | 617 | while (lpos >= _rl_screenwidth) |
d166f048 | 618 | { |
28ef6c31 JA |
619 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
620 | invisible characters that is longer than the screen width. The | |
621 | prompt_invis_chars_first_line variable could be made into an array | |
622 | saying how many invisible characters there are per line, but that's | |
623 | probably too much work for the benefit gained. How many people have | |
545f34cf CR |
624 | prompts that exceed two physical lines? |
625 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
37c41ab1 CR |
626 | #if defined (HANDLE_MULTIBYTE) |
627 | n0 = num; | |
628 | temp = local_prompt ? strlen (local_prompt) : 0; | |
629 | while (num < temp) | |
630 | { | |
631 | if (_rl_col_width (local_prompt, n0, num) > _rl_screenwidth) | |
632 | { | |
633 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
634 | break; | |
635 | } | |
636 | num++; | |
637 | } | |
638 | temp = num + | |
639 | #else | |
28ef6c31 | 640 | temp = ((newlines + 1) * _rl_screenwidth) + |
37c41ab1 | 641 | #endif /* !HANDLE_MULTIBYTE */ |
545f34cf CR |
642 | ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line |
643 | : ((newlines == 1) ? wrap_offset : 0)) | |
644 | : ((newlines == 0) ? wrap_offset :0)); | |
645 | ||
d166f048 | 646 | inv_lbreaks[++newlines] = temp; |
37c41ab1 CR |
647 | #if defined (HANDLE_MULTIBYTE) |
648 | lpos -= _rl_col_width (local_prompt, n0, num); | |
649 | #else | |
28ef6c31 | 650 | lpos -= _rl_screenwidth; |
37c41ab1 | 651 | #endif |
d166f048 | 652 | } |
ccc6cda3 | 653 | |
28ef6c31 JA |
654 | prompt_last_screen_line = newlines; |
655 | ||
656 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
657 | track of where the cursor is (c_pos), the number of the line containing | |
658 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). | |
659 | It maintains an array of line breaks for display (inv_lbreaks). | |
660 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 661 | lb_linenum = 0; |
7117c2d2 JA |
662 | #if defined (HANDLE_MULTIBYTE) |
663 | in = 0; | |
664 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
665 | { | |
666 | memset (&ps, 0, sizeof (mbstate_t)); | |
667 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
668 | } | |
669 | else | |
670 | wc_bytes = 1; | |
671 | while (in < rl_end) | |
672 | #else | |
d166f048 | 673 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 674 | #endif |
726f6388 JA |
675 | { |
676 | c = (unsigned char)rl_line_buffer[in]; | |
677 | ||
7117c2d2 JA |
678 | #if defined (HANDLE_MULTIBYTE) |
679 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
680 | { | |
d3a24ed2 | 681 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
682 | { |
683 | /* Byte sequence is invalid or shortened. Assume that the | |
684 | first byte represents a character. */ | |
685 | wc_bytes = 1; | |
686 | /* Assume that a character occupies a single column. */ | |
687 | wc_width = 1; | |
688 | memset (&ps, 0, sizeof (mbstate_t)); | |
689 | } | |
d3a24ed2 | 690 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
691 | break; /* Found '\0' */ |
692 | else | |
693 | { | |
694 | temp = wcwidth (wc); | |
d3a24ed2 | 695 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
696 | } |
697 | } | |
698 | #endif | |
699 | ||
726f6388 JA |
700 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
701 | { | |
702 | line_size *= 2; | |
f73dda09 JA |
703 | visible_line = (char *)xrealloc (visible_line, line_size); |
704 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
705 | line = invisible_line; |
706 | } | |
707 | ||
708 | if (in == rl_point) | |
ccc6cda3 JA |
709 | { |
710 | c_pos = out; | |
711 | lb_linenum = newlines; | |
712 | } | |
726f6388 | 713 | |
7117c2d2 JA |
714 | #if defined (HANDLE_MULTIBYTE) |
715 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
716 | #else | |
726f6388 | 717 | if (META_CHAR (c)) |
7117c2d2 | 718 | #endif |
726f6388 JA |
719 | { |
720 | if (_rl_output_meta_chars == 0) | |
721 | { | |
722 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 723 | |
28ef6c31 | 724 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 725 | { |
28ef6c31 | 726 | temp = _rl_screenwidth - lpos; |
bb70624e | 727 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
728 | inv_lbreaks[++newlines] = out + temp; |
729 | lpos = 4 - temp; | |
730 | } | |
731 | else | |
732 | lpos += 4; | |
733 | ||
726f6388 JA |
734 | out += 4; |
735 | } | |
736 | else | |
ccc6cda3 JA |
737 | { |
738 | line[out++] = c; | |
739 | CHECK_LPOS(); | |
740 | } | |
726f6388 JA |
741 | } |
742 | #if defined (DISPLAY_TABS) | |
743 | else if (c == '\t') | |
744 | { | |
28ef6c31 | 745 | register int newout; |
b72432fd JA |
746 | |
747 | #if 0 | |
ccc6cda3 | 748 | newout = (out | (int)7) + 1; |
b72432fd JA |
749 | #else |
750 | newout = out + 8 - lpos % 8; | |
751 | #endif | |
ccc6cda3 | 752 | temp = newout - out; |
28ef6c31 | 753 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
754 | { |
755 | register int temp2; | |
28ef6c31 | 756 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 757 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
758 | inv_lbreaks[++newlines] = out + temp2; |
759 | lpos = temp - temp2; | |
760 | while (out < newout) | |
761 | line[out++] = ' '; | |
762 | } | |
763 | else | |
764 | { | |
765 | while (out < newout) | |
766 | line[out++] = ' '; | |
767 | lpos += temp; | |
768 | } | |
726f6388 JA |
769 | } |
770 | #endif | |
28ef6c31 | 771 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
772 | { |
773 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 774 | CHECK_INV_LBREAKS (); |
b72432fd JA |
775 | inv_lbreaks[++newlines] = out; |
776 | lpos = 0; | |
777 | } | |
ccc6cda3 | 778 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
779 | { |
780 | line[out++] = '^'; | |
ccc6cda3 JA |
781 | CHECK_LPOS(); |
782 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
783 | CHECK_LPOS(); | |
726f6388 | 784 | } |
ccc6cda3 | 785 | else |
726f6388 | 786 | { |
7117c2d2 JA |
787 | #if defined (HANDLE_MULTIBYTE) |
788 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
789 | { | |
790 | register int i; | |
791 | ||
792 | _rl_wrapped_multicolumn = 0; | |
793 | ||
794 | if (_rl_screenwidth < lpos + wc_width) | |
795 | for (i = lpos; i < _rl_screenwidth; i++) | |
796 | { | |
797 | /* The space will be removed in update_line() */ | |
798 | line[out++] = ' '; | |
799 | _rl_wrapped_multicolumn++; | |
800 | CHECK_LPOS(); | |
801 | } | |
802 | if (in == rl_point) | |
803 | { | |
804 | c_pos = out; | |
805 | lb_linenum = newlines; | |
806 | } | |
807 | for (i = in; i < in+wc_bytes; i++) | |
808 | line[out++] = rl_line_buffer[i]; | |
809 | for (i = 0; i < wc_width; i++) | |
810 | CHECK_LPOS(); | |
811 | } | |
812 | else | |
813 | { | |
814 | line[out++] = c; | |
815 | CHECK_LPOS(); | |
816 | } | |
817 | #else | |
ccc6cda3 JA |
818 | line[out++] = c; |
819 | CHECK_LPOS(); | |
7117c2d2 JA |
820 | #endif |
821 | } | |
822 | ||
823 | #if defined (HANDLE_MULTIBYTE) | |
824 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
825 | { | |
826 | in += wc_bytes; | |
827 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
726f6388 | 828 | } |
7117c2d2 JA |
829 | else |
830 | in++; | |
831 | #endif | |
832 | ||
726f6388 JA |
833 | } |
834 | line[out] = '\0'; | |
835 | if (c_pos < 0) | |
ccc6cda3 JA |
836 | { |
837 | c_pos = out; | |
838 | lb_linenum = newlines; | |
839 | } | |
840 | ||
841 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 842 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
843 | inv_lbreaks[newlines+1] = out; |
844 | cursor_linenum = lb_linenum; | |
726f6388 | 845 | |
28ef6c31 JA |
846 | /* C_POS == position in buffer where cursor should be placed. |
847 | CURSOR_LINENUM == line number where the cursor should be placed. */ | |
726f6388 JA |
848 | |
849 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
850 | line buffers are really multiple lines, which would wrap every | |
851 | (screenwidth - 1) characters. Go through each in turn, finding | |
852 | the changed region and updating it. The line order is top to bottom. */ | |
853 | ||
854 | /* If we can move the cursor up and down, then use multiple lines, | |
855 | otherwise, let long lines display in a single terminal line, and | |
856 | horizontally scroll it. */ | |
857 | ||
28ef6c31 | 858 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 859 | { |
28089d04 | 860 | int nleft, pos, changed_screen_line, tx; |
726f6388 JA |
861 | |
862 | if (!rl_display_fixed || forced_display) | |
863 | { | |
864 | forced_display = 0; | |
865 | ||
866 | /* If we have more than a screenful of material to display, then | |
867 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 868 | not the first. */ |
28ef6c31 | 869 | if (out >= _rl_screenchars) |
7117c2d2 JA |
870 | { |
871 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
872 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
873 | else | |
874 | out = _rl_screenchars - 1; | |
875 | } | |
726f6388 JA |
876 | |
877 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
878 | second and subsequent lines start at inv_lbreaks[N], offset by |
879 | OFFSET (which has already been calculated above). */ | |
726f6388 JA |
880 | |
881 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
ccc6cda3 JA |
882 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
883 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
884 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 885 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 886 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 JA |
887 | |
888 | /* For each line in the buffer, do the updating display. */ | |
889 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
890 | { | |
28089d04 | 891 | o_cpos = _rl_last_c_pos; |
5c26afb8 | 892 | cpos_adjusted = 0; |
726f6388 | 893 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
ccc6cda3 | 894 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 | 895 | |
28089d04 CR |
896 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
897 | take invisible characters into account, since _rl_last_c_pos | |
898 | is an absolute cursor position in a multibyte locale. See | |
899 | if compensating here is the right thing, or if we have to | |
5c26afb8 CR |
900 | change update_line itself. There is one case in which |
901 | update_line adjusts _rl_last_c_pos itself (so it can pass | |
902 | _rl_move_cursor_relative accurate values); it communicates | |
903 | this back by setting cpos_adjusted */ | |
28089d04 | 904 | if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
5c26afb8 | 905 | cpos_adjusted == 0 && |
28089d04 CR |
906 | _rl_last_c_pos != o_cpos && |
907 | _rl_last_c_pos > wrap_offset && | |
908 | o_cpos < prompt_last_invisible) | |
909 | _rl_last_c_pos -= wrap_offset; | |
28089d04 | 910 | |
726f6388 JA |
911 | /* If this is the line with the prompt, we might need to |
912 | compensate for invisible characters in the new line. Do | |
913 | this only if there is not more than one new line (which | |
914 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
915 | and the new line is shorter than the old. Make sure we are |
916 | at the end of the new line before clearing. */ | |
726f6388 | 917 | if (linenum == 0 && |
ccc6cda3 | 918 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
919 | (wrap_offset > visible_wrap_offset) && |
920 | (_rl_last_c_pos < visible_first_line_len)) | |
921 | { | |
177d51f7 CR |
922 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
923 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
924 | else | |
925 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
726f6388 | 926 | if (nleft) |
d166f048 | 927 | _rl_clear_to_eol (nleft); |
726f6388 JA |
928 | } |
929 | ||
930 | /* Since the new first line is now visible, save its length. */ | |
931 | if (linenum == 0) | |
ccc6cda3 | 932 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
933 | } |
934 | ||
935 | /* We may have deleted some lines. If so, clear the left over | |
936 | blank ones at the bottom out. */ | |
937 | if (_rl_vis_botlin > inv_botlin) | |
938 | { | |
939 | char *tt; | |
940 | for (; linenum <= _rl_vis_botlin; linenum++) | |
941 | { | |
942 | tt = VIS_CHARS (linenum); | |
943 | _rl_move_vert (linenum); | |
944 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 945 | _rl_clear_to_eol |
28ef6c31 | 946 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
947 | } |
948 | } | |
949 | _rl_vis_botlin = inv_botlin; | |
950 | ||
726f6388 JA |
951 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
952 | different screen line during this redisplay. */ | |
953 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
954 | if (changed_screen_line) | |
955 | { | |
956 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 957 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
958 | the physical cursor position on the screen stays the same, |
959 | but the buffer position needs to be adjusted to account | |
960 | for invisible characters. */ | |
6bf74e5a | 961 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
b72432fd | 962 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
963 | } |
964 | ||
965 | /* We have to reprint the prompt if it contains invisible | |
966 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
967 | the characters from the current cursor position. But we |
968 | only need to reprint it if the cursor is before the last | |
969 | invisible character in the prompt string. */ | |
28ef6c31 | 970 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 971 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
28ef6c31 | 972 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
726f6388 | 973 | { |
bb70624e JA |
974 | #if defined (__MSDOS__) |
975 | putc ('\r', rl_outstream); | |
976 | #else | |
28ef6c31 JA |
977 | if (_rl_term_cr) |
978 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 979 | #endif |
726f6388 | 980 | _rl_output_some_chars (local_prompt, nleft); |
7117c2d2 | 981 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
28089d04 | 982 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft) - wrap_offset; |
7117c2d2 JA |
983 | else |
984 | _rl_last_c_pos = nleft; | |
726f6388 JA |
985 | } |
986 | ||
987 | /* Where on that line? And where does that line start | |
988 | in the buffer? */ | |
ccc6cda3 | 989 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 JA |
990 | /* nleft == number of characters in the line buffer between the |
991 | start of the line and the cursor position. */ | |
992 | nleft = c_pos - pos; | |
993 | ||
6bf74e5a CR |
994 | /* NLEFT is now a number of characters in a buffer. When in a |
995 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
996 | position that doesn't take invisible characters in the prompt | |
997 | into account. We use a fudge factor to compensate. */ | |
6bf74e5a | 998 | |
ccc6cda3 | 999 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 1000 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 1001 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
1002 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
1003 | { | |
7117c2d2 | 1004 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
28089d04 | 1005 | tx = _rl_col_width (&visible_line[pos], 0, nleft) - visible_wrap_offset; |
7117c2d2 | 1006 | else |
177d51f7 | 1007 | tx = nleft; |
28089d04 | 1008 | if (_rl_last_c_pos > tx) |
d11b8b46 | 1009 | { |
28089d04 | 1010 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ |
d11b8b46 CR |
1011 | _rl_last_c_pos = tx; |
1012 | } | |
726f6388 JA |
1013 | } |
1014 | ||
28089d04 CR |
1015 | /* We need to note that in a multibyte locale we are dealing with |
1016 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1017 | point specified by a buffer position (NLEFT) that doesn't take | |
1018 | invisible characters into account. */ | |
7117c2d2 JA |
1019 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1020 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
1021 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
1022 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1023 | } | |
1024 | } | |
1025 | else /* Do horizontal scrolling. */ | |
1026 | { | |
1027 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1028 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1029 | ||
1030 | /* Always at top line. */ | |
1031 | _rl_last_v_pos = 0; | |
1032 | ||
1033 | /* Compute where in the buffer the displayed line should start. This | |
1034 | will be LMARGIN. */ | |
1035 | ||
1036 | /* The number of characters that will be displayed before the cursor. */ | |
1037 | ndisp = c_pos - wrap_offset; | |
28ef6c31 | 1038 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1039 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 1040 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
726f6388 | 1041 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 1042 | t = _rl_screenwidth / 3; |
726f6388 JA |
1043 | |
1044 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 1045 | last_lmargin will be > 0. */ |
726f6388 JA |
1046 | |
1047 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
1048 | width, compute the starting offset so that the cursor is about |
1049 | two-thirds of the way across the screen. */ | |
28ef6c31 | 1050 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 JA |
1051 | { |
1052 | lmargin = c_pos - (2 * t); | |
1053 | if (lmargin < 0) | |
1054 | lmargin = 0; | |
1055 | /* If the left margin would be in the middle of a prompt with | |
1056 | invisible characters, don't display the prompt at all. */ | |
1057 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1058 | lmargin = nleft; | |
1059 | } | |
28ef6c31 | 1060 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1061 | lmargin = 0; |
726f6388 JA |
1062 | else if (phys_c_pos < 1) |
1063 | { | |
1064 | /* If we are moving back towards the beginning of the line and | |
1065 | the last margin is no longer correct, compute a new one. */ | |
1066 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ | |
1067 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1068 | lmargin = nleft; | |
1069 | } | |
1070 | else | |
b72432fd | 1071 | lmargin = last_lmargin; |
726f6388 JA |
1072 | |
1073 | /* If the first character on the screen isn't the first character | |
1074 | in the display line, indicate this with a special character. */ | |
1075 | if (lmargin > 0) | |
1076 | line[lmargin] = '<'; | |
1077 | ||
1078 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1079 | the whole line, indicate that with a special character at the |
1080 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1081 | wrap offset into account. */ | |
28ef6c31 | 1082 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1083 | if (t < out) |
b72432fd | 1084 | line[t - 1] = '>'; |
726f6388 JA |
1085 | |
1086 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
1087 | { | |
1088 | forced_display = 0; | |
1089 | update_line (&visible_line[last_lmargin], | |
1090 | &invisible_line[lmargin], | |
1091 | 0, | |
28ef6c31 JA |
1092 | _rl_screenwidth + visible_wrap_offset, |
1093 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1094 | 0); |
1095 | ||
1096 | /* If the visible new line is shorter than the old, but the number | |
1097 | of invisible characters is greater, and we are at the end of | |
1098 | the new line, we need to clear to eol. */ | |
1099 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1100 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1101 | (_rl_last_c_pos == out) && | |
1102 | t < visible_first_line_len) | |
1103 | { | |
28ef6c31 | 1104 | nleft = _rl_screenwidth - t; |
d166f048 | 1105 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1106 | } |
1107 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1108 | if (visible_first_line_len > _rl_screenwidth) |
1109 | visible_first_line_len = _rl_screenwidth; | |
726f6388 JA |
1110 | |
1111 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); | |
1112 | last_lmargin = lmargin; | |
1113 | } | |
1114 | } | |
1115 | fflush (rl_outstream); | |
1116 | ||
1117 | /* Swap visible and non-visible lines. */ | |
1118 | { | |
28ef6c31 | 1119 | char *vtemp = visible_line; |
bb70624e JA |
1120 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
1121 | ||
726f6388 | 1122 | visible_line = invisible_line; |
28ef6c31 | 1123 | invisible_line = vtemp; |
bb70624e | 1124 | |
ccc6cda3 JA |
1125 | vis_lbreaks = inv_lbreaks; |
1126 | inv_lbreaks = itemp; | |
bb70624e JA |
1127 | |
1128 | vis_lbsize = inv_lbsize; | |
1129 | inv_lbsize = ntemp; | |
1130 | ||
726f6388 JA |
1131 | rl_display_fixed = 0; |
1132 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1133 | are not displaying any invisible characters, so set visible_wrap_offset | |
1134 | to 0. */ | |
1135 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1136 | visible_wrap_offset = 0; | |
1137 | else | |
1138 | visible_wrap_offset = wrap_offset; | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | /* PWP: update_line() is based on finding the middle difference of each | |
1143 | line on the screen; vis: | |
1144 | ||
1145 | /old first difference | |
1146 | /beginning of line | /old last same /old EOL | |
1147 | v v v v | |
1148 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1149 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1150 | ^ ^ ^ ^ | |
1151 | \beginning of line | \new last same \new end of line | |
1152 | \new first difference | |
1153 | ||
1154 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1155 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1156 | |
1157 | Could be made even smarter, but this works well enough */ | |
1158 | static void | |
1159 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1160 | register char *old, *new; | |
ccc6cda3 | 1161 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1162 | { |
1163 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
1164 | int temp, lendiff, wsatend, od, nd; | |
ccc6cda3 | 1165 | int current_invis_chars; |
7117c2d2 JA |
1166 | int col_lendiff, col_temp; |
1167 | #if defined (HANDLE_MULTIBYTE) | |
1168 | mbstate_t ps_new, ps_old; | |
1169 | int new_offset, old_offset, tmp; | |
1170 | #endif | |
726f6388 JA |
1171 | |
1172 | /* If we're at the right edge of a terminal that supports xn, we're | |
1173 | ready to wrap around, so do so. This fixes problems with knowing | |
1174 | the exact cursor position and cut-and-paste with certain terminal | |
1175 | emulators. In this calculation, TEMP is the physical screen | |
1176 | position of the cursor. */ | |
177d51f7 CR |
1177 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1178 | temp = _rl_last_c_pos; | |
1179 | else | |
1180 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
28ef6c31 | 1181 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1182 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1183 | { |
7117c2d2 JA |
1184 | #if defined (HANDLE_MULTIBYTE) |
1185 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1186 | { | |
1187 | wchar_t wc; | |
1188 | mbstate_t ps; | |
1189 | int tempwidth, bytes; | |
1190 | size_t ret; | |
1191 | ||
1192 | /* This fixes only double-column characters, but if the wrapped | |
1193 | character comsumes more than three columns, spaces will be | |
1194 | inserted in the string buffer. */ | |
1195 | if (_rl_wrapped_line[current_line] > 0) | |
1196 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); | |
1197 | ||
1198 | memset (&ps, 0, sizeof (mbstate_t)); | |
1199 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
d3a24ed2 | 1200 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1201 | { |
1202 | tempwidth = 1; | |
1203 | ret = 1; | |
1204 | } | |
d3a24ed2 | 1205 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1206 | tempwidth = 0; |
1207 | else | |
1208 | tempwidth = wcwidth (wc); | |
1209 | ||
1210 | if (tempwidth > 0) | |
1211 | { | |
1212 | int count; | |
1213 | bytes = ret; | |
1214 | for (count = 0; count < bytes; count++) | |
1215 | putc (new[count], rl_outstream); | |
1216 | _rl_last_c_pos = tempwidth; | |
1217 | _rl_last_v_pos++; | |
1218 | memset (&ps, 0, sizeof (mbstate_t)); | |
1219 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1220 | if (ret != 0 && bytes != 0) | |
1221 | { | |
d3a24ed2 | 1222 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1223 | memmove (old+bytes, old+1, strlen (old+1)); |
1224 | else | |
1225 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1226 | memcpy (old, new, bytes); | |
1227 | } | |
1228 | } | |
1229 | else | |
1230 | { | |
1231 | putc (' ', rl_outstream); | |
1232 | _rl_last_c_pos = 1; | |
1233 | _rl_last_v_pos++; | |
1234 | if (old[0] && new[0]) | |
1235 | old[0] = new[0]; | |
1236 | } | |
1237 | } | |
726f6388 | 1238 | else |
7117c2d2 JA |
1239 | #endif |
1240 | { | |
1241 | if (new[0]) | |
1242 | putc (new[0], rl_outstream); | |
1243 | else | |
1244 | putc (' ', rl_outstream); | |
5c26afb8 | 1245 | _rl_last_c_pos = 1; |
7117c2d2 JA |
1246 | _rl_last_v_pos++; |
1247 | if (old[0] && new[0]) | |
1248 | old[0] = new[0]; | |
1249 | } | |
726f6388 | 1250 | } |
7117c2d2 | 1251 | |
726f6388 JA |
1252 | |
1253 | /* Find first difference. */ | |
7117c2d2 JA |
1254 | #if defined (HANDLE_MULTIBYTE) |
1255 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1256 | { | |
5e13499c CR |
1257 | /* See if the old line is a subset of the new line, so that the |
1258 | only change is adding characters. */ | |
1259 | temp = (omax < nmax) ? omax : nmax; | |
1260 | if (memcmp (old, new, temp) == 0) | |
7117c2d2 | 1261 | { |
5e13499c CR |
1262 | ofd = old + temp; |
1263 | nfd = new + temp; | |
d3a24ed2 CR |
1264 | } |
1265 | else | |
5e13499c CR |
1266 | { |
1267 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1268 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1269 | ||
1270 | if (omax == nmax && STREQN (new, old, omax)) | |
d3a24ed2 | 1271 | { |
5e13499c CR |
1272 | ofd = old + omax; |
1273 | nfd = new + nmax; | |
1274 | } | |
1275 | else | |
1276 | { | |
1277 | new_offset = old_offset = 0; | |
1278 | for (ofd = old, nfd = new; | |
1279 | (ofd - old < omax) && *ofd && | |
1280 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1281 | { | |
1282 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1283 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1284 | ofd = old + old_offset; | |
1285 | nfd = new + new_offset; | |
1286 | } | |
d3a24ed2 | 1287 | } |
7117c2d2 JA |
1288 | } |
1289 | } | |
1290 | else | |
1291 | #endif | |
726f6388 JA |
1292 | for (ofd = old, nfd = new; |
1293 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1294 | ofd++, nfd++) | |
1295 | ; | |
1296 | ||
1297 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1298 | of the distance between ne and new and oe and old, respectively, to | |
1299 | move a subtraction out of each loop. */ | |
1300 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1301 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1302 | ||
1303 | /* If no difference, continue to next line. */ | |
1304 | if (ofd == oe && nfd == ne) | |
1305 | return; | |
1306 | ||
1307 | wsatend = 1; /* flag for trailing whitespace */ | |
7117c2d2 JA |
1308 | |
1309 | #if defined (HANDLE_MULTIBYTE) | |
1310 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1311 | { | |
1312 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1313 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1314 | while ((ols > ofd) && (nls > nfd)) | |
1315 | { | |
1316 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1317 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1318 | ||
d3a24ed2 CR |
1319 | #if 0 |
1320 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1321 | _rl_adjust_point (old, ols - old, &ps_old); |
1322 | _rl_adjust_point (new, nls - new, &ps_new); | |
d3a24ed2 | 1323 | #endif |
7117c2d2 JA |
1324 | |
1325 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1326 | break; | |
1327 | ||
1328 | if (*ols == ' ') | |
1329 | wsatend = 0; | |
1330 | ||
1331 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1332 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1333 | } | |
1334 | } | |
1335 | else | |
1336 | { | |
1337 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1338 | ols = oe - 1; /* find last same */ |
1339 | nls = ne - 1; | |
1340 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1341 | { | |
1342 | if (*ols != ' ') | |
1343 | wsatend = 0; | |
1344 | ols--; | |
1345 | nls--; | |
1346 | } | |
7117c2d2 JA |
1347 | #if defined (HANDLE_MULTIBYTE) |
1348 | } | |
1349 | #endif | |
726f6388 JA |
1350 | |
1351 | if (wsatend) | |
1352 | { | |
1353 | ols = oe; | |
1354 | nls = ne; | |
1355 | } | |
7117c2d2 JA |
1356 | #if defined (HANDLE_MULTIBYTE) |
1357 | /* This may not work for stateful encoding, but who cares? To handle | |
1358 | stateful encoding properly, we have to scan each string from the | |
1359 | beginning and compare. */ | |
1360 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1361 | #else | |
726f6388 | 1362 | else if (*ols != *nls) |
7117c2d2 | 1363 | #endif |
726f6388 JA |
1364 | { |
1365 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 JA |
1366 | { |
1367 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1368 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1369 | else | |
1370 | ols++; | |
1371 | } | |
726f6388 | 1372 | if (*nls) |
7117c2d2 JA |
1373 | { |
1374 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1375 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1376 | else | |
1377 | nls++; | |
1378 | } | |
726f6388 JA |
1379 | } |
1380 | ||
ccc6cda3 JA |
1381 | /* count of invisible characters in the current invisible line. */ |
1382 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1383 | if (_rl_last_v_pos != current_line) | |
1384 | { | |
1385 | _rl_move_vert (current_line); | |
177d51f7 | 1386 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
ccc6cda3 JA |
1387 | _rl_last_c_pos += visible_wrap_offset; |
1388 | } | |
726f6388 JA |
1389 | |
1390 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1391 | prompt string, and the prompt string has not changed, and the current |
1392 | cursor position is before the last invisible character in the prompt, | |
1393 | and the index of the character to move to is past the end of the prompt | |
1394 | string, then redraw the entire prompt string. We can only do this | |
1395 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1396 | |
ccc6cda3 JA |
1397 | This is not an efficiency hack -- there is a problem with redrawing |
1398 | portions of the prompt string if they contain terminal escape | |
1399 | sequences (like drawing the `unbold' sequence without a corresponding | |
1400 | `bold') that manifests itself on certain terminals. */ | |
726f6388 JA |
1401 | |
1402 | lendiff = local_prompt ? strlen (local_prompt) : 0; | |
ccc6cda3 | 1403 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 1404 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 JA |
1405 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
1406 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) | |
726f6388 | 1407 | { |
bb70624e JA |
1408 | #if defined (__MSDOS__) |
1409 | putc ('\r', rl_outstream); | |
1410 | #else | |
28ef6c31 | 1411 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1412 | #endif |
726f6388 | 1413 | _rl_output_some_chars (local_prompt, lendiff); |
7117c2d2 | 1414 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5c26afb8 CR |
1415 | { |
1416 | /* We take wrap_offset into account here so we can pass correct | |
1417 | information to _rl_move_cursor_relative. */ | |
1418 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff) - wrap_offset; | |
1419 | cpos_adjusted = 1; | |
1420 | } | |
7117c2d2 JA |
1421 | else |
1422 | _rl_last_c_pos = lendiff; | |
726f6388 JA |
1423 | } |
1424 | ||
ccc6cda3 | 1425 | _rl_move_cursor_relative (od, old); |
726f6388 | 1426 | |
7117c2d2 JA |
1427 | /* if (len (new) > len (old)) |
1428 | lendiff == difference in buffer | |
1429 | col_lendiff == difference on screen | |
1430 | When not using multibyte characters, these are equal */ | |
726f6388 | 1431 | lendiff = (nls - nfd) - (ols - ofd); |
7117c2d2 JA |
1432 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1433 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1434 | else | |
1435 | col_lendiff = lendiff; | |
726f6388 | 1436 | |
ccc6cda3 JA |
1437 | /* If we are changing the number of invisible characters in a line, and |
1438 | the spot of first difference is before the end of the invisible chars, | |
1439 | lendiff needs to be adjusted. */ | |
1440 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1441 | current_invis_chars != visible_wrap_offset) | |
7117c2d2 JA |
1442 | { |
1443 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1444 | { | |
1445 | lendiff += visible_wrap_offset - current_invis_chars; | |
1446 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1447 | } | |
1448 | else | |
1449 | { | |
1450 | lendiff += visible_wrap_offset - current_invis_chars; | |
1451 | col_lendiff = lendiff; | |
1452 | } | |
1453 | } | |
ccc6cda3 | 1454 | |
726f6388 JA |
1455 | /* Insert (diff (len (old), len (new)) ch. */ |
1456 | temp = ne - nfd; | |
7117c2d2 JA |
1457 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1458 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1459 | else | |
1460 | col_temp = temp; | |
1461 | ||
1462 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
726f6388 JA |
1463 | { |
1464 | /* Non-zero if we're increasing the number of lines. */ | |
1465 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1466 | /* Sometimes it is cheaper to print the characters rather than | |
1467 | use the terminal's capabilities. If we're growing the number | |
1468 | of lines, make sure we actually cause the new line to wrap | |
1469 | around on auto-wrapping terminals. */ | |
7117c2d2 | 1470 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1471 | { |
28ef6c31 | 1472 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1473 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1474 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 JA |
1475 | invisible characters. We need to just draw them. */ |
1476 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
28ef6c31 | 1477 | lendiff <= prompt_visible_length || !current_invis_chars)) |
726f6388 | 1478 | { |
7117c2d2 JA |
1479 | insert_some_chars (nfd, lendiff, col_lendiff); |
1480 | _rl_last_c_pos += col_lendiff; | |
726f6388 | 1481 | } |
d90269dd | 1482 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
726f6388 JA |
1483 | { |
1484 | /* At the end of a line the characters do not have to | |
1485 | be "inserted". They can just be placed on the screen. */ | |
ccc6cda3 | 1486 | /* However, this screws up the rest of this block, which |
b72432fd | 1487 | assumes you've done the insert because you can. */ |
726f6388 | 1488 | _rl_output_some_chars (nfd, lendiff); |
7117c2d2 | 1489 | _rl_last_c_pos += col_lendiff; |
726f6388 | 1490 | } |
ccc6cda3 JA |
1491 | else |
1492 | { | |
1493 | /* We have horizontal scrolling and we are not inserting at | |
1494 | the end. We have invisible characters in this line. This | |
1495 | is a dumb update. */ | |
1496 | _rl_output_some_chars (nfd, temp); | |
5c26afb8 | 1497 | _rl_last_c_pos += col_temp; |
ccc6cda3 JA |
1498 | return; |
1499 | } | |
726f6388 JA |
1500 | /* Copy (new) chars to screen from first diff to last match. */ |
1501 | temp = nls - nfd; | |
1502 | if ((temp - lendiff) > 0) | |
1503 | { | |
1504 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
5e13499c CR |
1505 | #if 1 |
1506 | /* XXX -- this bears closer inspection. Fixes a redisplay bug | |
1507 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1508 | multibyte characters and prompt strings with invisible | |
1509 | characters, but was previously disabled. */ | |
7117c2d2 | 1510 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); |
d3a24ed2 CR |
1511 | #else |
1512 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff); | |
7117c2d2 | 1513 | #endif |
726f6388 JA |
1514 | } |
1515 | } | |
1516 | else | |
1517 | { | |
1518 | /* cannot insert chars, write to EOL */ | |
1519 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1520 | _rl_last_c_pos += col_temp; |
5c26afb8 CR |
1521 | /* If we're in a multibyte locale and were before the last invisible |
1522 | char in the current line (which implies we just output some invisible | |
28089d04 CR |
1523 | characters) we need to adjust _rl_last_c_pos, since it represents |
1524 | a physical character position. */ | |
726f6388 JA |
1525 | } |
1526 | } | |
1527 | else /* Delete characters from line. */ | |
1528 | { | |
1529 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1530 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1531 | { |
1532 | /* If all we're doing is erasing the invisible characters in the | |
1533 | prompt string, don't bother. It screws up the assumptions | |
1534 | about what's on the screen. */ | |
1535 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1536 | -lendiff == visible_wrap_offset) | |
7117c2d2 | 1537 | col_lendiff = 0; |
726f6388 | 1538 | |
7117c2d2 JA |
1539 | if (col_lendiff) |
1540 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 JA |
1541 | |
1542 | /* Copy (new) chars to screen from first diff to last match */ | |
1543 | temp = nls - nfd; | |
1544 | if (temp > 0) | |
1545 | { | |
1546 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1547 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp);; |
726f6388 JA |
1548 | } |
1549 | } | |
1550 | /* Otherwise, print over the existing material. */ | |
1551 | else | |
1552 | { | |
1553 | if (temp > 0) | |
1554 | { | |
1555 | _rl_output_some_chars (nfd, temp); | |
28089d04 | 1556 | _rl_last_c_pos += col_temp; /* XXX */ |
726f6388 JA |
1557 | } |
1558 | lendiff = (oe - old) - (ne - new); | |
7117c2d2 JA |
1559 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1560 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1561 | else | |
1562 | col_lendiff = lendiff; | |
1563 | ||
1564 | if (col_lendiff) | |
b72432fd JA |
1565 | { |
1566 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 1567 | space_to_eol (col_lendiff); |
b72432fd | 1568 | else |
7117c2d2 | 1569 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 1570 | } |
726f6388 JA |
1571 | } |
1572 | } | |
1573 | } | |
1574 | ||
1575 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1576 | int |
726f6388 JA |
1577 | rl_on_new_line () |
1578 | { | |
1579 | if (visible_line) | |
1580 | visible_line[0] = '\0'; | |
1581 | ||
1582 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1583 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1584 | if (vis_lbreaks) |
1585 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1586 | visible_wrap_offset = 0; | |
726f6388 JA |
1587 | return 0; |
1588 | } | |
1589 | ||
bb70624e JA |
1590 | /* Tell the update routines that we have moved onto a new line with the |
1591 | prompt already displayed. Code originally from the version of readline | |
61deeb13 CR |
1592 | distributed with CLISP. rl_expand_prompt must have already been called |
1593 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
1594 | int |
1595 | rl_on_new_line_with_prompt () | |
1596 | { | |
1597 | int prompt_size, i, l, real_screenwidth, newlines; | |
61deeb13 | 1598 | char *prompt_last_line, *lprompt; |
bb70624e JA |
1599 | |
1600 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1601 | the already-displayed prompt. */ | |
1602 | prompt_size = strlen (rl_prompt) + 1; | |
1603 | init_line_structures (prompt_size); | |
1604 | ||
1605 | /* Make sure the line structures hold the already-displayed prompt for | |
1606 | redisplay. */ | |
61deeb13 CR |
1607 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1608 | strcpy (visible_line, lprompt); | |
1609 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
1610 | |
1611 | /* If the prompt contains newlines, take the last tail. */ | |
1612 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1613 | if (!prompt_last_line) | |
1614 | prompt_last_line = rl_prompt; | |
1615 | ||
1616 | l = strlen (prompt_last_line); | |
7117c2d2 | 1617 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
28089d04 | 1618 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); /* XXX */ |
7117c2d2 JA |
1619 | else |
1620 | _rl_last_c_pos = l; | |
bb70624e JA |
1621 | |
1622 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1623 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1624 | one less, see terminal.c. */ | |
28ef6c31 | 1625 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1626 | _rl_last_v_pos = l / real_screenwidth; |
1627 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1628 | whether the cursor is at the end of the last line, or already at the | |
1629 | beginning of the next line. Output a newline just to be safe. */ | |
1630 | if (l > 0 && (l % real_screenwidth) == 0) | |
1631 | _rl_output_some_chars ("\n", 1); | |
1632 | last_lmargin = 0; | |
1633 | ||
1634 | newlines = 0; i = 0; | |
1635 | while (i <= l) | |
1636 | { | |
1637 | _rl_vis_botlin = newlines; | |
1638 | vis_lbreaks[newlines++] = i; | |
1639 | i += real_screenwidth; | |
1640 | } | |
1641 | vis_lbreaks[newlines] = l; | |
1642 | visible_wrap_offset = 0; | |
1643 | ||
61deeb13 CR |
1644 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1645 | ||
bb70624e JA |
1646 | return 0; |
1647 | } | |
1648 | ||
726f6388 | 1649 | /* Actually update the display, period. */ |
ccc6cda3 | 1650 | int |
726f6388 JA |
1651 | rl_forced_update_display () |
1652 | { | |
1653 | if (visible_line) | |
1654 | { | |
1655 | register char *temp = visible_line; | |
1656 | ||
ccc6cda3 | 1657 | while (*temp) |
b72432fd | 1658 | *temp++ = '\0'; |
726f6388 JA |
1659 | } |
1660 | rl_on_new_line (); | |
1661 | forced_display++; | |
ccc6cda3 | 1662 | (*rl_redisplay_function) (); |
726f6388 JA |
1663 | return 0; |
1664 | } | |
1665 | ||
1666 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
28089d04 CR |
1667 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
1668 | buffer index.) | |
726f6388 JA |
1669 | DATA is the contents of the screen line of interest; i.e., where |
1670 | the movement is being done. */ | |
1671 | void | |
1672 | _rl_move_cursor_relative (new, data) | |
1673 | int new; | |
28ef6c31 | 1674 | const char *data; |
726f6388 JA |
1675 | { |
1676 | register int i; | |
28089d04 CR |
1677 | int woff; /* number of invisible chars on current line */ |
1678 | int cpos, dpos; /* current and desired cursor positions */ | |
726f6388 | 1679 | |
28089d04 CR |
1680 | woff = W_OFFSET (_rl_last_v_pos, wrap_offset); |
1681 | cpos = _rl_last_c_pos; | |
7117c2d2 JA |
1682 | #if defined (HANDLE_MULTIBYTE) |
1683 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1684 | a multibyte string, but _rl_last_c_pos is the display position. In | |
d3a24ed2 | 1685 | this case, NEW's display position is not obvious and must be |
28089d04 CR |
1686 | calculated. We need to account for invisible characters in this line, |
1687 | as long as we are past them and they are counted by _rl_col_width. */ | |
1688 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
d3a24ed2 | 1689 | { |
28089d04 CR |
1690 | dpos = _rl_col_width (data, 0, new); |
1691 | if (dpos > woff) | |
1692 | dpos -= woff; | |
d3a24ed2 | 1693 | } |
28089d04 | 1694 | else |
7117c2d2 | 1695 | #endif |
28089d04 CR |
1696 | dpos = new; |
1697 | ||
1698 | /* If we don't have to do anything, then return. */ | |
1699 | if (cpos == dpos) | |
1700 | return; | |
726f6388 JA |
1701 | |
1702 | /* It may be faster to output a CR, and then move forwards instead | |
1703 | of moving backwards. */ | |
1704 | /* i == current physical cursor position. */ | |
28089d04 CR |
1705 | #if defined (HANDLE_MULTIBYTE) |
1706 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1707 | i = _rl_last_c_pos; | |
1708 | else | |
1709 | #endif | |
1710 | i = _rl_last_c_pos - woff; | |
ccc6cda3 | 1711 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || |
28ef6c31 | 1712 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
1713 | { |
1714 | #if defined (__MSDOS__) | |
1715 | putc ('\r', rl_outstream); | |
1716 | #else | |
28ef6c31 | 1717 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 | 1718 | #endif /* !__MSDOS__ */ |
28089d04 | 1719 | cpos = _rl_last_c_pos = 0; |
726f6388 JA |
1720 | } |
1721 | ||
28089d04 | 1722 | if (cpos < dpos) |
726f6388 JA |
1723 | { |
1724 | /* Move the cursor forward. We do it by printing the command | |
1725 | to move the cursor forward if there is one, else print that | |
1726 | portion of the output buffer again. Which is cheaper? */ | |
1727 | ||
1728 | /* The above comment is left here for posterity. It is faster | |
1729 | to print one character (non-control) than to print a control | |
1730 | sequence telling the terminal to move forward one character. | |
1731 | That kind of control is for people who don't know what the | |
1732 | data is underneath the cursor. */ | |
1733 | #if defined (HACK_TERMCAP_MOTION) | |
28ef6c31 | 1734 | if (_rl_term_forward_char) |
7117c2d2 | 1735 | { |
28089d04 CR |
1736 | for (i = cpos; i < dpos; i++) |
1737 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
7117c2d2 JA |
1738 | } |
1739 | else | |
28089d04 | 1740 | #endif /* HACK_TERMCAP_MOTION */ |
7117c2d2 JA |
1741 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1742 | { | |
1743 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1744 | for (i = 0; i < new; i++) | |
1745 | putc (data[i], rl_outstream); | |
1746 | } | |
726f6388 | 1747 | else |
28089d04 | 1748 | for (i = cpos; i < new; i++) |
726f6388 | 1749 | putc (data[i], rl_outstream); |
726f6388 | 1750 | } |
28089d04 | 1751 | |
7117c2d2 JA |
1752 | #if defined (HANDLE_MULTIBYTE) |
1753 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1754 | The byte length of the string is probably bigger than the column width | |
1755 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1756 | display point is less than _rl_last_c_pos. */ | |
7117c2d2 | 1757 | #endif |
28089d04 CR |
1758 | else if (cpos > dpos) |
1759 | _rl_backspace (cpos - dpos); | |
7117c2d2 | 1760 | |
28089d04 | 1761 | _rl_last_c_pos = dpos; |
726f6388 JA |
1762 | } |
1763 | ||
1764 | /* PWP: move the cursor up or down. */ | |
1765 | void | |
1766 | _rl_move_vert (to) | |
1767 | int to; | |
1768 | { | |
1769 | register int delta, i; | |
1770 | ||
28ef6c31 | 1771 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
1772 | return; |
1773 | ||
726f6388 JA |
1774 | if ((delta = to - _rl_last_v_pos) > 0) |
1775 | { | |
1776 | for (i = 0; i < delta; i++) | |
1777 | putc ('\n', rl_outstream); | |
bb70624e JA |
1778 | #if defined (__MSDOS__) |
1779 | putc ('\r', rl_outstream); | |
1780 | #else | |
28ef6c31 | 1781 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1782 | #endif |
726f6388 JA |
1783 | _rl_last_c_pos = 0; |
1784 | } | |
1785 | else | |
1786 | { /* delta < 0 */ | |
28ef6c31 | 1787 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 1788 | for (i = 0; i < -delta; i++) |
28ef6c31 | 1789 | tputs (_rl_term_up, 1, _rl_output_character_function); |
726f6388 | 1790 | } |
bb70624e | 1791 | |
726f6388 JA |
1792 | _rl_last_v_pos = to; /* Now TO is here */ |
1793 | } | |
1794 | ||
1795 | /* Physically print C on rl_outstream. This is for functions which know | |
1796 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 1797 | int |
726f6388 JA |
1798 | rl_show_char (c) |
1799 | int c; | |
1800 | { | |
1801 | int n = 1; | |
1802 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1803 | { | |
1804 | fprintf (rl_outstream, "M-"); | |
1805 | n += 2; | |
1806 | c = UNMETA (c); | |
1807 | } | |
1808 | ||
1809 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 1810 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 1811 | #else |
ccc6cda3 | 1812 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
1813 | #endif /* !DISPLAY_TABS */ |
1814 | { | |
1815 | fprintf (rl_outstream, "C-"); | |
1816 | n += 2; | |
ccc6cda3 | 1817 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
1818 | } |
1819 | ||
1820 | putc (c, rl_outstream); | |
1821 | fflush (rl_outstream); | |
1822 | return n; | |
1823 | } | |
1824 | ||
1825 | int | |
1826 | rl_character_len (c, pos) | |
1827 | register int c, pos; | |
1828 | { | |
1829 | unsigned char uc; | |
1830 | ||
1831 | uc = (unsigned char)c; | |
1832 | ||
1833 | if (META_CHAR (uc)) | |
1834 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1835 | ||
1836 | if (uc == '\t') | |
1837 | { | |
1838 | #if defined (DISPLAY_TABS) | |
1839 | return (((pos | 7) + 1) - pos); | |
1840 | #else | |
1841 | return (2); | |
1842 | #endif /* !DISPLAY_TABS */ | |
1843 | } | |
1844 | ||
ccc6cda3 JA |
1845 | if (CTRL_CHAR (c) || c == RUBOUT) |
1846 | return (2); | |
1847 | ||
f73dda09 | 1848 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 | 1849 | } |
726f6388 JA |
1850 | /* How to print things in the "echo-area". The prompt is treated as a |
1851 | mini-modeline. */ | |
6e70dbff | 1852 | static int msg_saved_prompt = 0; |
726f6388 | 1853 | |
ccc6cda3 JA |
1854 | #if defined (USE_VARARGS) |
1855 | int | |
1856 | #if defined (PREFER_STDARG) | |
1857 | rl_message (const char *format, ...) | |
1858 | #else | |
726f6388 JA |
1859 | rl_message (va_alist) |
1860 | va_dcl | |
ccc6cda3 | 1861 | #endif |
726f6388 | 1862 | { |
726f6388 | 1863 | va_list args; |
ccc6cda3 JA |
1864 | #if defined (PREFER_VARARGS) |
1865 | char *format; | |
1866 | #endif | |
726f6388 | 1867 | |
ccc6cda3 JA |
1868 | #if defined (PREFER_STDARG) |
1869 | va_start (args, format); | |
1870 | #else | |
726f6388 JA |
1871 | va_start (args); |
1872 | format = va_arg (args, char *); | |
ccc6cda3 JA |
1873 | #endif |
1874 | ||
f73dda09 JA |
1875 | #if defined (HAVE_VSNPRINTF) |
1876 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
1877 | #else | |
726f6388 | 1878 | vsprintf (msg_buf, format, args); |
f73dda09 JA |
1879 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1880 | #endif | |
726f6388 JA |
1881 | va_end (args); |
1882 | ||
6e70dbff CR |
1883 | if (saved_local_prompt == 0) |
1884 | { | |
1885 | rl_save_prompt (); | |
1886 | msg_saved_prompt = 1; | |
1887 | } | |
726f6388 | 1888 | rl_display_prompt = msg_buf; |
6e70dbff CR |
1889 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
1890 | &prompt_last_invisible, | |
1891 | &prompt_invis_chars_first_line, | |
1892 | &prompt_physical_chars); | |
1893 | local_prompt_prefix = (char *)NULL; | |
ccc6cda3 | 1894 | (*rl_redisplay_function) (); |
6e70dbff | 1895 | |
726f6388 JA |
1896 | return 0; |
1897 | } | |
ccc6cda3 JA |
1898 | #else /* !USE_VARARGS */ |
1899 | int | |
726f6388 JA |
1900 | rl_message (format, arg1, arg2) |
1901 | char *format; | |
1902 | { | |
1903 | sprintf (msg_buf, format, arg1, arg2); | |
f73dda09 | 1904 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
6e70dbff | 1905 | |
726f6388 | 1906 | rl_display_prompt = msg_buf; |
6e70dbff CR |
1907 | if (saved_local_prompt == 0) |
1908 | { | |
1909 | rl_save_prompt (); | |
1910 | msg_saved_prompt = 1; | |
1911 | } | |
1912 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, | |
1913 | &prompt_last_invisible, | |
1914 | &prompt_invis_chars_first_line, | |
1915 | &prompt_physical_chars); | |
1916 | local_prompt_prefix = (char *)NULL; | |
ccc6cda3 | 1917 | (*rl_redisplay_function) (); |
6e70dbff | 1918 | |
726f6388 JA |
1919 | return 0; |
1920 | } | |
ccc6cda3 | 1921 | #endif /* !USE_VARARGS */ |
726f6388 JA |
1922 | |
1923 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 1924 | int |
726f6388 JA |
1925 | rl_clear_message () |
1926 | { | |
1927 | rl_display_prompt = rl_prompt; | |
6e70dbff CR |
1928 | if (msg_saved_prompt) |
1929 | { | |
1930 | rl_restore_prompt (); | |
1931 | msg_saved_prompt = 0; | |
1932 | } | |
ccc6cda3 | 1933 | (*rl_redisplay_function) (); |
726f6388 JA |
1934 | return 0; |
1935 | } | |
1936 | ||
ccc6cda3 | 1937 | int |
726f6388 JA |
1938 | rl_reset_line_state () |
1939 | { | |
1940 | rl_on_new_line (); | |
1941 | ||
1942 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
1943 | forced_display = 1; | |
1944 | return 0; | |
1945 | } | |
1946 | ||
ccc6cda3 | 1947 | void |
b72432fd | 1948 | rl_save_prompt () |
ccc6cda3 JA |
1949 | { |
1950 | saved_local_prompt = local_prompt; | |
1951 | saved_local_prefix = local_prompt_prefix; | |
6e70dbff | 1952 | saved_prefix_length = prompt_prefix_length; |
28ef6c31 JA |
1953 | saved_last_invisible = prompt_last_invisible; |
1954 | saved_visible_length = prompt_visible_length; | |
d3a24ed2 | 1955 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
762a763b | 1956 | saved_physical_chars = prompt_physical_chars; |
ccc6cda3 JA |
1957 | |
1958 | local_prompt = local_prompt_prefix = (char *)0; | |
6e70dbff | 1959 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
762a763b | 1960 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
1961 | } |
1962 | ||
1963 | void | |
b72432fd | 1964 | rl_restore_prompt () |
ccc6cda3 | 1965 | { |
28ef6c31 JA |
1966 | FREE (local_prompt); |
1967 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
1968 | |
1969 | local_prompt = saved_local_prompt; | |
1970 | local_prompt_prefix = saved_local_prefix; | |
6e70dbff | 1971 | prompt_prefix_length = saved_prefix_length; |
28ef6c31 JA |
1972 | prompt_last_invisible = saved_last_invisible; |
1973 | prompt_visible_length = saved_visible_length; | |
d3a24ed2 | 1974 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
762a763b | 1975 | prompt_physical_chars = saved_physical_chars; |
6e70dbff CR |
1976 | |
1977 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
1978 | saved_local_prompt = saved_local_prefix = (char *)0; | |
1979 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; | |
1980 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
ccc6cda3 JA |
1981 | } |
1982 | ||
1983 | char * | |
1984 | _rl_make_prompt_for_search (pchar) | |
1985 | int pchar; | |
1986 | { | |
1987 | int len; | |
1988 | char *pmt; | |
1989 | ||
b72432fd | 1990 | rl_save_prompt (); |
ccc6cda3 JA |
1991 | |
1992 | if (saved_local_prompt == 0) | |
1993 | { | |
1994 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
f73dda09 | 1995 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 1996 | if (len) |
b72432fd | 1997 | strcpy (pmt, rl_prompt); |
ccc6cda3 JA |
1998 | pmt[len] = pchar; |
1999 | pmt[len+1] = '\0'; | |
2000 | } | |
2001 | else | |
2002 | { | |
2003 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; | |
f73dda09 | 2004 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 2005 | if (len) |
b72432fd | 2006 | strcpy (pmt, saved_local_prompt); |
ccc6cda3 JA |
2007 | pmt[len] = pchar; |
2008 | pmt[len+1] = '\0'; | |
2009 | local_prompt = savestring (pmt); | |
28ef6c31 JA |
2010 | prompt_last_invisible = saved_last_invisible; |
2011 | prompt_visible_length = saved_visible_length + 1; | |
ccc6cda3 | 2012 | } |
762a763b | 2013 | |
6e70dbff CR |
2014 | prompt_physical_chars = saved_physical_chars + 1; |
2015 | ||
ccc6cda3 JA |
2016 | return pmt; |
2017 | } | |
2018 | ||
726f6388 JA |
2019 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
2020 | void | |
2021 | _rl_erase_at_end_of_line (l) | |
2022 | int l; | |
2023 | { | |
2024 | register int i; | |
2025 | ||
ccc6cda3 | 2026 | _rl_backspace (l); |
726f6388 JA |
2027 | for (i = 0; i < l; i++) |
2028 | putc (' ', rl_outstream); | |
ccc6cda3 | 2029 | _rl_backspace (l); |
726f6388 JA |
2030 | for (i = 0; i < l; i++) |
2031 | visible_line[--_rl_last_c_pos] = '\0'; | |
2032 | rl_display_fixed++; | |
2033 | } | |
2034 | ||
2035 | /* Clear to the end of the line. COUNT is the minimum | |
2036 | number of character spaces to clear, */ | |
d166f048 JA |
2037 | void |
2038 | _rl_clear_to_eol (count) | |
726f6388 JA |
2039 | int count; |
2040 | { | |
28ef6c31 JA |
2041 | if (_rl_term_clreol) |
2042 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d166f048 | 2043 | else if (count) |
726f6388 JA |
2044 | space_to_eol (count); |
2045 | } | |
2046 | ||
2047 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2048 | number of character spaces to clear, */ | |
2049 | static void | |
2050 | space_to_eol (count) | |
2051 | int count; | |
2052 | { | |
2053 | register int i; | |
2054 | ||
2055 | for (i = 0; i < count; i++) | |
2056 | putc (' ', rl_outstream); | |
2057 | ||
2058 | _rl_last_c_pos += count; | |
2059 | } | |
2060 | ||
d166f048 JA |
2061 | void |
2062 | _rl_clear_screen () | |
2063 | { | |
28ef6c31 JA |
2064 | if (_rl_term_clrpag) |
2065 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 2066 | else |
28ef6c31 | 2067 | rl_crlf (); |
d166f048 JA |
2068 | } |
2069 | ||
7117c2d2 | 2070 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 2071 | static void |
7117c2d2 | 2072 | insert_some_chars (string, count, col) |
726f6388 | 2073 | char *string; |
7117c2d2 | 2074 | int count, col; |
726f6388 | 2075 | { |
9607141c CR |
2076 | #if defined (__MSDOS__) || defined (__MINGW32__) |
2077 | _rl_output_some_chars (string, count); | |
2078 | #else | |
7117c2d2 JA |
2079 | /* DEBUGGING */ |
2080 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2081 | if (count != col) | |
2082 | fprintf(stderr, "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); | |
2083 | ||
726f6388 | 2084 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2085 | if (_rl_term_IC) |
726f6388 | 2086 | { |
ccc6cda3 | 2087 | char *buffer; |
7117c2d2 JA |
2088 | |
2089 | buffer = tgoto (_rl_term_IC, 0, col); | |
726f6388 JA |
2090 | tputs (buffer, 1, _rl_output_character_function); |
2091 | _rl_output_some_chars (string, count); | |
2092 | } | |
2093 | else | |
2094 | { | |
2095 | register int i; | |
2096 | ||
2097 | /* If we have to turn on insert-mode, then do so. */ | |
28ef6c31 JA |
2098 | if (_rl_term_im && *_rl_term_im) |
2099 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
726f6388 JA |
2100 | |
2101 | /* If there is a special command for inserting characters, then | |
2102 | use that first to open up the space. */ | |
28ef6c31 | 2103 | if (_rl_term_ic && *_rl_term_ic) |
726f6388 | 2104 | { |
7117c2d2 | 2105 | for (i = col; i--; ) |
28ef6c31 | 2106 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
726f6388 JA |
2107 | } |
2108 | ||
2109 | /* Print the text. */ | |
2110 | _rl_output_some_chars (string, count); | |
2111 | ||
2112 | /* If there is a string to turn off insert mode, we had best use | |
2113 | it now. */ | |
28ef6c31 JA |
2114 | if (_rl_term_ei && *_rl_term_ei) |
2115 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
726f6388 | 2116 | } |
9607141c | 2117 | #endif /* __MSDOS__ || __MINGW32__ */ |
726f6388 JA |
2118 | } |
2119 | ||
2120 | /* Delete COUNT characters from the display line. */ | |
2121 | static void | |
2122 | delete_chars (count) | |
2123 | int count; | |
2124 | { | |
28ef6c31 | 2125 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2126 | return; |
2127 | ||
9607141c | 2128 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
28ef6c31 | 2129 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2130 | { |
ccc6cda3 | 2131 | char *buffer; |
28ef6c31 | 2132 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2133 | tputs (buffer, count, _rl_output_character_function); |
2134 | } | |
2135 | else | |
2136 | { | |
28ef6c31 | 2137 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2138 | while (count--) |
28ef6c31 | 2139 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2140 | } |
9607141c | 2141 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
726f6388 JA |
2142 | } |
2143 | ||
2144 | void | |
2145 | _rl_update_final () | |
2146 | { | |
2147 | int full_lines; | |
2148 | ||
2149 | full_lines = 0; | |
ccc6cda3 JA |
2150 | /* If the cursor is the only thing on an otherwise-blank last line, |
2151 | compensate so we don't print an extra CRLF. */ | |
2152 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2153 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2154 | { |
2155 | _rl_vis_botlin--; | |
2156 | full_lines = 1; | |
2157 | } | |
2158 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2159 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2160 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2161 | { |
726f6388 | 2162 | char *last_line; |
7117c2d2 | 2163 | |
bb70624e | 2164 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
28ef6c31 | 2165 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
d166f048 | 2166 | _rl_clear_to_eol (0); |
28ef6c31 | 2167 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2168 | } |
2169 | _rl_vis_botlin = 0; | |
28ef6c31 | 2170 | rl_crlf (); |
726f6388 JA |
2171 | fflush (rl_outstream); |
2172 | rl_display_fixed++; | |
2173 | } | |
2174 | ||
2175 | /* Move to the start of the current line. */ | |
2176 | static void | |
2177 | cr () | |
2178 | { | |
28ef6c31 | 2179 | if (_rl_term_cr) |
726f6388 | 2180 | { |
bb70624e JA |
2181 | #if defined (__MSDOS__) |
2182 | putc ('\r', rl_outstream); | |
2183 | #else | |
28ef6c31 | 2184 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2185 | #endif |
726f6388 JA |
2186 | _rl_last_c_pos = 0; |
2187 | } | |
2188 | } | |
2189 | ||
bb70624e JA |
2190 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2191 | terminal escape sequences. Called with the cursor at column 0 of the | |
2192 | line to draw the prompt on. */ | |
2193 | static void | |
2194 | redraw_prompt (t) | |
2195 | char *t; | |
2196 | { | |
6e70dbff | 2197 | char *oldp; |
bb70624e | 2198 | |
bb70624e | 2199 | oldp = rl_display_prompt; |
6e70dbff | 2200 | rl_save_prompt (); |
bb70624e JA |
2201 | |
2202 | rl_display_prompt = t; | |
28ef6c31 JA |
2203 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2204 | &prompt_last_invisible, | |
43cdcad8 CR |
2205 | &prompt_invis_chars_first_line, |
2206 | &prompt_physical_chars); | |
bb70624e | 2207 | local_prompt_prefix = (char *)NULL; |
6e70dbff | 2208 | |
bb70624e JA |
2209 | rl_forced_update_display (); |
2210 | ||
2211 | rl_display_prompt = oldp; | |
6e70dbff | 2212 | rl_restore_prompt(); |
bb70624e JA |
2213 | } |
2214 | ||
726f6388 JA |
2215 | /* Redisplay the current line after a SIGWINCH is received. */ |
2216 | void | |
2217 | _rl_redisplay_after_sigwinch () | |
2218 | { | |
bb70624e | 2219 | char *t; |
726f6388 JA |
2220 | |
2221 | /* Clear the current line and put the cursor at column 0. Make sure | |
2222 | the right thing happens if we have wrapped to a new screen line. */ | |
28ef6c31 | 2223 | if (_rl_term_cr) |
726f6388 | 2224 | { |
bb70624e JA |
2225 | #if defined (__MSDOS__) |
2226 | putc ('\r', rl_outstream); | |
2227 | #else | |
28ef6c31 | 2228 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2229 | #endif |
726f6388 | 2230 | _rl_last_c_pos = 0; |
bb70624e | 2231 | #if defined (__MSDOS__) |
28ef6c31 | 2232 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2233 | putc ('\r', rl_outstream); |
2234 | #else | |
28ef6c31 JA |
2235 | if (_rl_term_clreol) |
2236 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2237 | else |
2238 | { | |
28ef6c31 JA |
2239 | space_to_eol (_rl_screenwidth); |
2240 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2241 | } |
bb70624e | 2242 | #endif |
726f6388 JA |
2243 | if (_rl_last_v_pos > 0) |
2244 | _rl_move_vert (0); | |
2245 | } | |
2246 | else | |
28ef6c31 | 2247 | rl_crlf (); |
726f6388 JA |
2248 | |
2249 | /* Redraw only the last line of a multi-line prompt. */ | |
2250 | t = strrchr (rl_display_prompt, '\n'); | |
2251 | if (t) | |
bb70624e | 2252 | redraw_prompt (++t); |
726f6388 JA |
2253 | else |
2254 | rl_forced_update_display (); | |
2255 | } | |
ccc6cda3 JA |
2256 | |
2257 | void | |
2258 | _rl_clean_up_for_exit () | |
2259 | { | |
2260 | if (readline_echoing_p) | |
2261 | { | |
2262 | _rl_move_vert (_rl_vis_botlin); | |
2263 | _rl_vis_botlin = 0; | |
2264 | fflush (rl_outstream); | |
b72432fd | 2265 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2266 | } |
2267 | } | |
b72432fd JA |
2268 | |
2269 | void | |
2270 | _rl_erase_entire_line () | |
2271 | { | |
2272 | cr (); | |
2273 | _rl_clear_to_eol (0); | |
2274 | cr (); | |
2275 | fflush (rl_outstream); | |
2276 | } | |
bb70624e JA |
2277 | |
2278 | /* return the `current display line' of the cursor -- the number of lines to | |
2279 | move up to get to the first screen line of the current readline line. */ | |
2280 | int | |
2281 | _rl_current_display_line () | |
2282 | { | |
2283 | int ret, nleft; | |
2284 | ||
2285 | /* Find out whether or not there might be invisible characters in the | |
2286 | editing buffer. */ | |
2287 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2288 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2289 | else |
28ef6c31 | 2290 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2291 | |
2292 | if (nleft > 0) | |
28ef6c31 | 2293 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2294 | else |
2295 | ret = 0; | |
2296 | ||
2297 | return ret; | |
2298 | } | |
7117c2d2 JA |
2299 | |
2300 | #if defined (HANDLE_MULTIBYTE) | |
2301 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2302 | In the case of multibyte characters with stateful encoding, we have to | |
2303 | scan from the beginning of the string to take the state into account. */ | |
2304 | static int | |
2305 | _rl_col_width (str, start, end) | |
d3a24ed2 | 2306 | const char *str; |
7117c2d2 JA |
2307 | int start, end; |
2308 | { | |
2309 | wchar_t wc; | |
2310 | mbstate_t ps = {0}; | |
2311 | int tmp, point, width, max; | |
2312 | ||
2313 | if (end <= start) | |
2314 | return 0; | |
2315 | ||
2316 | point = 0; | |
2317 | max = end; | |
2318 | ||
2319 | while (point < start) | |
2320 | { | |
2321 | tmp = mbrlen (str + point, max, &ps); | |
d3a24ed2 | 2322 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2323 | { |
2324 | /* In this case, the bytes are invalid or too short to compose a | |
2325 | multibyte character, so we assume that the first byte represents | |
2326 | a single character. */ | |
2327 | point++; | |
2328 | max--; | |
2329 | ||
2330 | /* Clear the state of the byte sequence, because in this case the | |
2331 | effect of mbstate is undefined. */ | |
2332 | memset (&ps, 0, sizeof (mbstate_t)); | |
2333 | } | |
d3a24ed2 | 2334 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2335 | break; /* Found '\0' */ |
7117c2d2 JA |
2336 | else |
2337 | { | |
2338 | point += tmp; | |
2339 | max -= tmp; | |
2340 | } | |
2341 | } | |
2342 | ||
2343 | /* If START is not a byte that starts a character, then POINT will be | |
2344 | greater than START. In this case, assume that (POINT - START) gives | |
2345 | a byte count that is the number of columns of difference. */ | |
2346 | width = point - start; | |
2347 | ||
2348 | while (point < end) | |
2349 | { | |
2350 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
d3a24ed2 | 2351 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2352 | { |
2353 | /* In this case, the bytes are invalid or too short to compose a | |
2354 | multibyte character, so we assume that the first byte represents | |
2355 | a single character. */ | |
2356 | point++; | |
2357 | max--; | |
2358 | ||
2359 | /* and assume that the byte occupies a single column. */ | |
2360 | width++; | |
2361 | ||
2362 | /* Clear the state of the byte sequence, because in this case the | |
2363 | effect of mbstate is undefined. */ | |
2364 | memset (&ps, 0, sizeof (mbstate_t)); | |
2365 | } | |
d3a24ed2 | 2366 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2367 | break; /* Found '\0' */ |
7117c2d2 JA |
2368 | else |
2369 | { | |
2370 | point += tmp; | |
2371 | max -= tmp; | |
2372 | tmp = wcwidth(wc); | |
2373 | width += (tmp >= 0) ? tmp : 1; | |
2374 | } | |
2375 | } | |
2376 | ||
2377 | width += point - end; | |
2378 | ||
2379 | return width; | |
2380 | } | |
2381 | #endif /* HANDLE_MULTIBYTE */ |