Commit | Line | Data |
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d60d9f65 SS |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
5bdf8622 | 3 | /* Copyright (C) 1987-2005 Free Software Foundation, Inc. |
d60d9f65 SS |
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 | |
1b17e766 | 10 | as published by the Free Software Foundation; either version 2, or |
d60d9f65 SS |
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, | |
1b17e766 | 21 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
d60d9f65 SS |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <sys/types.h> | |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
34 | #include "posixstat.h" | |
35 | ||
36 | #if defined (HAVE_STDLIB_H) | |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
42 | #include <stdio.h> | |
43 | ||
30083a32 EZ |
44 | #ifdef __MSDOS__ |
45 | # include <pc.h> | |
46 | #endif | |
47 | ||
d60d9f65 SS |
48 | /* System-specific feature definitions and include files. */ |
49 | #include "rldefs.h" | |
9255ee31 | 50 | #include "rlmbutil.h" |
d60d9f65 SS |
51 | |
52 | /* Termcap library stuff. */ | |
53 | #include "tcap.h" | |
54 | ||
55 | /* Some standard library routines. */ | |
56 | #include "readline.h" | |
57 | #include "history.h" | |
58 | ||
1b17e766 EZ |
59 | #include "rlprivate.h" |
60 | #include "xmalloc.h" | |
61 | ||
d60d9f65 SS |
62 | #if !defined (strchr) && !defined (__STDC__) |
63 | extern char *strchr (), *strrchr (); | |
64 | #endif /* !strchr && !__STDC__ */ | |
65 | ||
1b17e766 | 66 | #if defined (HACK_TERMCAP_MOTION) |
9255ee31 | 67 | extern char *_rl_term_forward_char; |
d60d9f65 | 68 | #endif |
d60d9f65 | 69 | |
9255ee31 EZ |
70 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
71 | static void space_to_eol PARAMS((int)); | |
72 | static void delete_chars PARAMS((int)); | |
73 | static void insert_some_chars PARAMS((char *, int, int)); | |
74 | static void cr PARAMS((void)); | |
75 | ||
76 | #if defined (HANDLE_MULTIBYTE) | |
288381c0 | 77 | static int _rl_col_width PARAMS((const char *, int, int)); |
9255ee31 EZ |
78 | static int *_rl_wrapped_line; |
79 | #else | |
80 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
81 | #endif | |
d60d9f65 SS |
82 | |
83 | static int *inv_lbreaks, *vis_lbreaks; | |
1b17e766 | 84 | static int inv_lbsize, vis_lbsize; |
d60d9f65 SS |
85 | |
86 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
87 | by backing up or outputting a carriage return and moving forward. */ | |
88 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
89 | ||
90 | /* **************************************************************** */ | |
91 | /* */ | |
92 | /* Display stuff */ | |
93 | /* */ | |
94 | /* **************************************************************** */ | |
95 | ||
96 | /* This is the stuff that is hard for me. I never seem to write good | |
97 | display routines in C. Let's see how I do this time. */ | |
98 | ||
99 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
100 | the problems of input lines longer than the screen width. | |
101 | ||
102 | update_line and the code that calls it makes a multiple line, | |
103 | automatically wrapping line update. Careful attention needs | |
104 | to be paid to the vertical position variables. */ | |
105 | ||
106 | /* Keep two buffers; one which reflects the current contents of the | |
107 | screen, and the other to draw what we think the new contents should | |
108 | be. Then compare the buffers, and make whatever changes to the | |
109 | screen itself that we should. Finally, make the buffer that we | |
110 | just drew into be the one which reflects the current contents of the | |
111 | screen, and place the cursor where it belongs. | |
112 | ||
113 | Commands that want to can fix the display themselves, and then let | |
114 | this function know that the display has been fixed by setting the | |
115 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
116 | ||
117 | /* Application-specific redisplay function. */ | |
9255ee31 | 118 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
d60d9f65 SS |
119 | |
120 | /* Global variables declared here. */ | |
121 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
122 | int rl_display_fixed = 0; | |
123 | ||
124 | int _rl_suppress_redisplay = 0; | |
5bdf8622 | 125 | int _rl_want_redisplay = 0; |
d60d9f65 SS |
126 | |
127 | /* The stuff that gets printed out before the actual text of the line. | |
128 | This is usually pointing to rl_prompt. */ | |
129 | char *rl_display_prompt = (char *)NULL; | |
130 | ||
131 | /* Pseudo-global variables declared here. */ | |
5bdf8622 | 132 | |
d60d9f65 | 133 | /* The visible cursor position. If you print some text, adjust this. */ |
5bdf8622 DJ |
134 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
135 | supporting multibyte characters, and an absolute cursor position when | |
136 | in such a locale. This is an artifact of the donated multibyte support. | |
137 | Care must be taken when modifying its value. */ | |
d60d9f65 SS |
138 | int _rl_last_c_pos = 0; |
139 | int _rl_last_v_pos = 0; | |
140 | ||
5bdf8622 DJ |
141 | static int cpos_adjusted; |
142 | ||
d60d9f65 SS |
143 | /* Number of lines currently on screen minus 1. */ |
144 | int _rl_vis_botlin = 0; | |
145 | ||
146 | /* Variables used only in this file. */ | |
147 | /* The last left edge of text that was displayed. This is used when | |
148 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
149 | static int last_lmargin; | |
150 | ||
151 | /* The line display buffers. One is the line currently displayed on | |
152 | the screen. The other is the line about to be displayed. */ | |
153 | static char *visible_line = (char *)NULL; | |
154 | static char *invisible_line = (char *)NULL; | |
155 | ||
156 | /* A buffer for `modeline' messages. */ | |
157 | static char msg_buf[128]; | |
158 | ||
159 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
160 | static int forced_display; | |
161 | ||
162 | /* Default and initial buffer size. Can grow. */ | |
163 | static int line_size = 1024; | |
164 | ||
9255ee31 EZ |
165 | /* Variables to keep track of the expanded prompt string, which may |
166 | include invisible characters. */ | |
167 | ||
d60d9f65 | 168 | static char *local_prompt, *local_prompt_prefix; |
9255ee31 | 169 | static int prompt_visible_length, prompt_prefix_length; |
d60d9f65 SS |
170 | |
171 | /* The number of invisible characters in the line currently being | |
172 | displayed on the screen. */ | |
173 | static int visible_wrap_offset; | |
174 | ||
9255ee31 EZ |
175 | /* The number of invisible characters in the prompt string. Static so it |
176 | can be shared between rl_redisplay and update_line */ | |
d60d9f65 SS |
177 | static int wrap_offset; |
178 | ||
9255ee31 EZ |
179 | /* The index of the last invisible character in the prompt string. */ |
180 | static int prompt_last_invisible; | |
d60d9f65 SS |
181 | |
182 | /* The length (buffer offset) of the first line of the last (possibly | |
183 | multi-line) buffer displayed on the screen. */ | |
184 | static int visible_first_line_len; | |
185 | ||
9255ee31 EZ |
186 | /* Number of invisible characters on the first physical line of the prompt. |
187 | Only valid when the number of physical characters in the prompt exceeds | |
188 | (or is equal to) _rl_screenwidth. */ | |
189 | static int prompt_invis_chars_first_line; | |
190 | ||
191 | static int prompt_last_screen_line; | |
192 | ||
5bdf8622 DJ |
193 | static int prompt_physical_chars; |
194 | ||
195 | /* Variables to save and restore prompt and display information. */ | |
196 | ||
197 | /* These are getting numerous enough that it's time to create a struct. */ | |
198 | ||
199 | static char *saved_local_prompt; | |
200 | static char *saved_local_prefix; | |
201 | static int saved_last_invisible; | |
202 | static int saved_visible_length; | |
203 | static int saved_prefix_length; | |
204 | static int saved_invis_chars_first_line; | |
205 | static int saved_physical_chars; | |
206 | ||
d60d9f65 SS |
207 | /* Expand the prompt string S and return the number of visible |
208 | characters in *LP, if LP is not null. This is currently more-or-less | |
209 | a placeholder for expansion. LIP, if non-null is a place to store the | |
9255ee31 EZ |
210 | index of the last invisible character in the returned string. NIFLP, |
211 | if non-zero, is a place to store the number of invisible characters in | |
5bdf8622 DJ |
212 | the first prompt line. The previous are used as byte counts -- indexes |
213 | into a character buffer. */ | |
d60d9f65 SS |
214 | |
215 | /* Current implementation: | |
216 | \001 (^A) start non-visible characters | |
217 | \002 (^B) end non-visible characters | |
218 | all characters except \001 and \002 (following a \001) are copied to | |
219 | the returned string; all characters except those between \001 and | |
220 | \002 are assumed to be `visible'. */ | |
221 | ||
222 | static char * | |
5bdf8622 | 223 | expand_prompt (pmt, lp, lip, niflp, vlp) |
d60d9f65 | 224 | char *pmt; |
5bdf8622 | 225 | int *lp, *lip, *niflp, *vlp; |
d60d9f65 SS |
226 | { |
227 | char *r, *ret, *p; | |
5bdf8622 | 228 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
d60d9f65 SS |
229 | |
230 | /* Short-circuit if we can. */ | |
5bdf8622 | 231 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
d60d9f65 SS |
232 | { |
233 | r = savestring (pmt); | |
234 | if (lp) | |
235 | *lp = strlen (r); | |
5bdf8622 DJ |
236 | if (lip) |
237 | *lip = 0; | |
238 | if (niflp) | |
239 | *niflp = 0; | |
240 | if (vlp) | |
241 | *vlp = lp ? *lp : strlen (r); | |
d60d9f65 SS |
242 | return r; |
243 | } | |
244 | ||
245 | l = strlen (pmt); | |
9255ee31 EZ |
246 | r = ret = (char *)xmalloc (l + 1); |
247 | ||
248 | invfl = 0; /* invisible chars in first line of prompt */ | |
5bdf8622 | 249 | invflset = 0; /* we only want to set invfl once */ |
9255ee31 | 250 | |
5bdf8622 | 251 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
d60d9f65 SS |
252 | { |
253 | /* This code strips the invisible character string markers | |
254 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
255 | if (*p == RL_PROMPT_START_IGNORE) | |
256 | { | |
257 | ignoring++; | |
258 | continue; | |
259 | } | |
260 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
261 | { | |
262 | ignoring = 0; | |
5bdf8622 DJ |
263 | if (p[-1] != RL_PROMPT_START_IGNORE) |
264 | last = r - ret - 1; | |
d60d9f65 SS |
265 | continue; |
266 | } | |
267 | else | |
268 | { | |
5bdf8622 DJ |
269 | #if defined (HANDLE_MULTIBYTE) |
270 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
271 | { | |
272 | pind = p - pmt; | |
273 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
274 | l = ind - pind; | |
275 | while (l--) | |
276 | *r++ = *p++; | |
277 | if (!ignoring) | |
278 | { | |
279 | rl += ind - pind; | |
280 | physchars += _rl_col_width (pmt, pind, ind); | |
281 | } | |
282 | else | |
283 | ninvis += ind - pind; | |
284 | p--; /* compensate for later increment */ | |
285 | } | |
9255ee31 | 286 | else |
5bdf8622 DJ |
287 | #endif |
288 | { | |
289 | *r++ = *p; | |
290 | if (!ignoring) | |
291 | { | |
292 | rl++; /* visible length byte counter */ | |
293 | physchars++; | |
294 | } | |
295 | else | |
296 | ninvis++; /* invisible chars byte counter */ | |
297 | } | |
298 | ||
299 | if (invflset == 0 && rl >= _rl_screenwidth) | |
300 | { | |
301 | invfl = ninvis; | |
302 | invflset = 1; | |
303 | } | |
d60d9f65 SS |
304 | } |
305 | } | |
306 | ||
9255ee31 EZ |
307 | if (rl < _rl_screenwidth) |
308 | invfl = ninvis; | |
309 | ||
d60d9f65 SS |
310 | *r = '\0'; |
311 | if (lp) | |
312 | *lp = rl; | |
313 | if (lip) | |
314 | *lip = last; | |
9255ee31 EZ |
315 | if (niflp) |
316 | *niflp = invfl; | |
5bdf8622 DJ |
317 | if (vlp) |
318 | *vlp = physchars; | |
d60d9f65 SS |
319 | return ret; |
320 | } | |
321 | ||
1b17e766 EZ |
322 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
323 | PMT and return the rest of PMT. */ | |
324 | char * | |
325 | _rl_strip_prompt (pmt) | |
326 | char *pmt; | |
327 | { | |
328 | char *ret; | |
329 | ||
5bdf8622 | 330 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
1b17e766 EZ |
331 | return ret; |
332 | } | |
333 | ||
d60d9f65 SS |
334 | /* |
335 | * Expand the prompt string into the various display components, if | |
336 | * necessary. | |
337 | * | |
338 | * local_prompt = expanded last line of string in rl_display_prompt | |
339 | * (portion after the final newline) | |
340 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
341 | * expanded via expand_prompt | |
9255ee31 EZ |
342 | * prompt_visible_length = number of visible characters in local_prompt |
343 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
d60d9f65 SS |
344 | * |
345 | * This function is called once per call to readline(). It may also be | |
346 | * called arbitrarily to expand the primary prompt. | |
347 | * | |
348 | * The return value is the number of visible characters on the last line | |
349 | * of the (possibly multi-line) prompt. | |
350 | */ | |
351 | int | |
352 | rl_expand_prompt (prompt) | |
353 | char *prompt; | |
354 | { | |
355 | char *p, *t; | |
356 | int c; | |
357 | ||
358 | /* Clear out any saved values. */ | |
9255ee31 EZ |
359 | FREE (local_prompt); |
360 | FREE (local_prompt_prefix); | |
361 | ||
d60d9f65 | 362 | local_prompt = local_prompt_prefix = (char *)0; |
5bdf8622 DJ |
363 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
364 | prompt_visible_length = prompt_physical_chars = 0; | |
d60d9f65 SS |
365 | |
366 | if (prompt == 0 || *prompt == 0) | |
367 | return (0); | |
368 | ||
369 | p = strrchr (prompt, '\n'); | |
370 | if (!p) | |
371 | { | |
9255ee31 EZ |
372 | /* The prompt is only one logical line, though it might wrap. */ |
373 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
374 | &prompt_last_invisible, | |
5bdf8622 DJ |
375 | &prompt_invis_chars_first_line, |
376 | &prompt_physical_chars); | |
d60d9f65 | 377 | local_prompt_prefix = (char *)0; |
9255ee31 | 378 | return (prompt_visible_length); |
d60d9f65 SS |
379 | } |
380 | else | |
381 | { | |
382 | /* The prompt spans multiple lines. */ | |
383 | t = ++p; | |
9255ee31 EZ |
384 | local_prompt = expand_prompt (p, &prompt_visible_length, |
385 | &prompt_last_invisible, | |
5bdf8622 DJ |
386 | (int *)NULL, |
387 | &prompt_physical_chars); | |
d60d9f65 SS |
388 | c = *t; *t = '\0'; |
389 | /* The portion of the prompt string up to and including the | |
390 | final newline is now null-terminated. */ | |
9255ee31 EZ |
391 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
392 | (int *)NULL, | |
5bdf8622 DJ |
393 | &prompt_invis_chars_first_line, |
394 | (int *)NULL); | |
d60d9f65 | 395 | *t = c; |
9255ee31 | 396 | return (prompt_prefix_length); |
d60d9f65 SS |
397 | } |
398 | } | |
399 | ||
1b17e766 EZ |
400 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
401 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
402 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
403 | increased. If the lines have already been allocated, this ensures that | |
404 | they can hold at least MINSIZE characters. */ | |
405 | static void | |
406 | init_line_structures (minsize) | |
407 | int minsize; | |
408 | { | |
409 | register int n; | |
410 | ||
411 | if (invisible_line == 0) /* initialize it */ | |
412 | { | |
413 | if (line_size < minsize) | |
414 | line_size = minsize; | |
9255ee31 EZ |
415 | visible_line = (char *)xmalloc (line_size); |
416 | invisible_line = (char *)xmalloc (line_size); | |
1b17e766 EZ |
417 | } |
418 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
419 | { | |
420 | line_size *= 2; | |
421 | if (line_size < minsize) | |
422 | line_size = minsize; | |
9255ee31 EZ |
423 | visible_line = (char *)xrealloc (visible_line, line_size); |
424 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
1b17e766 EZ |
425 | } |
426 | ||
427 | for (n = minsize; n < line_size; n++) | |
428 | { | |
429 | visible_line[n] = 0; | |
430 | invisible_line[n] = 1; | |
431 | } | |
432 | ||
433 | if (vis_lbreaks == 0) | |
434 | { | |
435 | /* should be enough. */ | |
436 | inv_lbsize = vis_lbsize = 256; | |
437 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
438 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
9255ee31 EZ |
439 | #if defined (HANDLE_MULTIBYTE) |
440 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
441 | #endif | |
1b17e766 EZ |
442 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
443 | } | |
444 | } | |
445 | ||
d60d9f65 SS |
446 | /* Basic redisplay algorithm. */ |
447 | void | |
448 | rl_redisplay () | |
449 | { | |
450 | register int in, out, c, linenum, cursor_linenum; | |
451 | register char *line; | |
5bdf8622 DJ |
452 | int c_pos, inv_botlin, lb_botlin, lb_linenum, o_cpos; |
453 | int newlines, lpos, temp, modmark, n0, num; | |
d60d9f65 | 454 | char *prompt_this_line; |
9255ee31 EZ |
455 | #if defined (HANDLE_MULTIBYTE) |
456 | wchar_t wc; | |
457 | size_t wc_bytes; | |
458 | int wc_width; | |
459 | mbstate_t ps; | |
460 | int _rl_wrapped_multicolumn = 0; | |
461 | #endif | |
d60d9f65 SS |
462 | |
463 | if (!readline_echoing_p) | |
464 | return; | |
465 | ||
466 | if (!rl_display_prompt) | |
467 | rl_display_prompt = ""; | |
468 | ||
5bdf8622 | 469 | if (invisible_line == 0 || vis_lbreaks == 0) |
d60d9f65 | 470 | { |
1b17e766 | 471 | init_line_structures (0); |
d60d9f65 SS |
472 | rl_on_new_line (); |
473 | } | |
474 | ||
475 | /* Draw the line into the buffer. */ | |
476 | c_pos = -1; | |
477 | ||
478 | line = invisible_line; | |
479 | out = inv_botlin = 0; | |
480 | ||
481 | /* Mark the line as modified or not. We only do this for history | |
482 | lines. */ | |
5bdf8622 | 483 | modmark = 0; |
d60d9f65 SS |
484 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
485 | { | |
486 | line[out++] = '*'; | |
487 | line[out] = '\0'; | |
5bdf8622 | 488 | modmark = 1; |
d60d9f65 SS |
489 | } |
490 | ||
491 | /* If someone thought that the redisplay was handled, but the currently | |
492 | visible line has a different modification state than the one about | |
493 | to become visible, then correct the caller's misconception. */ | |
494 | if (visible_line[0] != invisible_line[0]) | |
495 | rl_display_fixed = 0; | |
496 | ||
497 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
498 | one passed to readline()), use the values we have already expanded. | |
499 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
500 | number of non-visible characters in the prompt string. */ | |
501 | if (rl_display_prompt == rl_prompt || local_prompt) | |
502 | { | |
503 | int local_len = local_prompt ? strlen (local_prompt) : 0; | |
504 | if (local_prompt_prefix && forced_display) | |
505 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
506 | ||
507 | if (local_len > 0) | |
508 | { | |
c862e87b JM |
509 | temp = local_len + out + 2; |
510 | if (temp >= line_size) | |
511 | { | |
512 | line_size = (temp + 1024) - (temp % 1024); | |
9255ee31 EZ |
513 | visible_line = (char *)xrealloc (visible_line, line_size); |
514 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
c862e87b | 515 | } |
d60d9f65 SS |
516 | strncpy (line + out, local_prompt, local_len); |
517 | out += local_len; | |
518 | } | |
519 | line[out] = '\0'; | |
9255ee31 | 520 | wrap_offset = local_len - prompt_visible_length; |
d60d9f65 SS |
521 | } |
522 | else | |
523 | { | |
524 | int pmtlen; | |
525 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
526 | if (!prompt_this_line) | |
527 | prompt_this_line = rl_display_prompt; | |
528 | else | |
529 | { | |
530 | prompt_this_line++; | |
1b17e766 | 531 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
d60d9f65 SS |
532 | if (forced_display) |
533 | { | |
1b17e766 | 534 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
d60d9f65 SS |
535 | /* Make sure we are at column zero even after a newline, |
536 | regardless of the state of terminal output processing. */ | |
1b17e766 | 537 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
d60d9f65 SS |
538 | cr (); |
539 | } | |
540 | } | |
541 | ||
5bdf8622 | 542 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
c862e87b JM |
543 | temp = pmtlen + out + 2; |
544 | if (temp >= line_size) | |
545 | { | |
546 | line_size = (temp + 1024) - (temp % 1024); | |
9255ee31 EZ |
547 | visible_line = (char *)xrealloc (visible_line, line_size); |
548 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
c862e87b | 549 | } |
d60d9f65 SS |
550 | strncpy (line + out, prompt_this_line, pmtlen); |
551 | out += pmtlen; | |
552 | line[out] = '\0'; | |
9255ee31 | 553 | wrap_offset = prompt_invis_chars_first_line = 0; |
d60d9f65 SS |
554 | } |
555 | ||
1b17e766 EZ |
556 | #define CHECK_INV_LBREAKS() \ |
557 | do { \ | |
558 | if (newlines >= (inv_lbsize - 2)) \ | |
559 | { \ | |
560 | inv_lbsize *= 2; \ | |
561 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
562 | } \ | |
563 | } while (0) | |
9255ee31 EZ |
564 | |
565 | #if defined (HANDLE_MULTIBYTE) | |
d60d9f65 SS |
566 | #define CHECK_LPOS() \ |
567 | do { \ | |
c862e87b | 568 | lpos++; \ |
9255ee31 | 569 | if (lpos >= _rl_screenwidth) \ |
c862e87b | 570 | { \ |
1b17e766 EZ |
571 | if (newlines >= (inv_lbsize - 2)) \ |
572 | { \ | |
573 | inv_lbsize *= 2; \ | |
574 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
9255ee31 | 575 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
1b17e766 | 576 | } \ |
c862e87b | 577 | inv_lbreaks[++newlines] = out; \ |
9255ee31 | 578 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
c862e87b JM |
579 | lpos = 0; \ |
580 | } \ | |
d60d9f65 | 581 | } while (0) |
9255ee31 EZ |
582 | #else |
583 | #define CHECK_LPOS() \ | |
584 | do { \ | |
585 | lpos++; \ | |
586 | if (lpos >= _rl_screenwidth) \ | |
587 | { \ | |
588 | if (newlines >= (inv_lbsize - 2)) \ | |
589 | { \ | |
590 | inv_lbsize *= 2; \ | |
591 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
592 | } \ | |
593 | inv_lbreaks[++newlines] = out; \ | |
594 | lpos = 0; \ | |
595 | } \ | |
596 | } while (0) | |
597 | #endif | |
d60d9f65 SS |
598 | |
599 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
600 | inv_lbreaks[newlines = 0] = 0; | |
5bdf8622 | 601 | #if 0 |
d60d9f65 | 602 | lpos = out - wrap_offset; |
5bdf8622 DJ |
603 | #else |
604 | lpos = prompt_physical_chars + modmark; | |
605 | #endif | |
606 | ||
9255ee31 EZ |
607 | #if defined (HANDLE_MULTIBYTE) |
608 | memset (_rl_wrapped_line, 0, vis_lbsize); | |
5bdf8622 | 609 | num = 0; |
9255ee31 EZ |
610 | #endif |
611 | ||
612 | /* prompt_invis_chars_first_line is the number of invisible characters in | |
613 | the first physical line of the prompt. | |
614 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
615 | chars on the second line. */ | |
d60d9f65 | 616 | |
9255ee31 | 617 | /* what if lpos is already >= _rl_screenwidth before we start drawing the |
d60d9f65 | 618 | contents of the command line? */ |
9255ee31 | 619 | while (lpos >= _rl_screenwidth) |
d60d9f65 | 620 | { |
9255ee31 EZ |
621 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
622 | invisible characters that is longer than the screen width. The | |
623 | prompt_invis_chars_first_line variable could be made into an array | |
624 | saying how many invisible characters there are per line, but that's | |
625 | probably too much work for the benefit gained. How many people have | |
5bdf8622 DJ |
626 | prompts that exceed two physical lines? |
627 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
628 | #if defined (HANDLE_MULTIBYTE) | |
629 | n0 = num; | |
630 | temp = local_prompt ? strlen (local_prompt) : 0; | |
631 | while (num < temp) | |
632 | { | |
633 | if (_rl_col_width (local_prompt, n0, num) > _rl_screenwidth) | |
634 | { | |
635 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
636 | break; | |
637 | } | |
638 | num++; | |
639 | } | |
640 | temp = num + | |
9255ee31 | 641 | #else |
5bdf8622 DJ |
642 | temp = ((newlines + 1) * _rl_screenwidth) + |
643 | #endif /* !HANDLE_MULTIBYTE */ | |
644 | ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line | |
645 | : ((newlines == 1) ? wrap_offset : 0)) | |
646 | : ((newlines == 0) ? wrap_offset :0)); | |
647 | ||
d60d9f65 | 648 | inv_lbreaks[++newlines] = temp; |
5bdf8622 DJ |
649 | #if defined (HANDLE_MULTIBYTE) |
650 | lpos -= _rl_col_width (local_prompt, n0, num); | |
651 | #else | |
9255ee31 | 652 | lpos -= _rl_screenwidth; |
5bdf8622 | 653 | #endif |
d60d9f65 SS |
654 | } |
655 | ||
9255ee31 EZ |
656 | prompt_last_screen_line = newlines; |
657 | ||
658 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
659 | track of where the cursor is (c_pos), the number of the line containing | |
660 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). | |
661 | It maintains an array of line breaks for display (inv_lbreaks). | |
662 | This handles expanding tabs for display and displaying meta characters. */ | |
d60d9f65 | 663 | lb_linenum = 0; |
9255ee31 EZ |
664 | #if defined (HANDLE_MULTIBYTE) |
665 | in = 0; | |
666 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
667 | { | |
668 | memset (&ps, 0, sizeof (mbstate_t)); | |
669 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
670 | } | |
671 | else | |
672 | wc_bytes = 1; | |
673 | while (in < rl_end) | |
674 | #else | |
d60d9f65 | 675 | for (in = 0; in < rl_end; in++) |
9255ee31 | 676 | #endif |
d60d9f65 SS |
677 | { |
678 | c = (unsigned char)rl_line_buffer[in]; | |
679 | ||
9255ee31 EZ |
680 | #if defined (HANDLE_MULTIBYTE) |
681 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
682 | { | |
5bdf8622 | 683 | if (MB_INVALIDCH (wc_bytes)) |
9255ee31 EZ |
684 | { |
685 | /* Byte sequence is invalid or shortened. Assume that the | |
686 | first byte represents a character. */ | |
687 | wc_bytes = 1; | |
688 | /* Assume that a character occupies a single column. */ | |
689 | wc_width = 1; | |
690 | memset (&ps, 0, sizeof (mbstate_t)); | |
691 | } | |
5bdf8622 | 692 | else if (MB_NULLWCH (wc_bytes)) |
9255ee31 EZ |
693 | break; /* Found '\0' */ |
694 | else | |
695 | { | |
696 | temp = wcwidth (wc); | |
5bdf8622 | 697 | wc_width = (temp >= 0) ? temp : 1; |
9255ee31 EZ |
698 | } |
699 | } | |
700 | #endif | |
701 | ||
d60d9f65 SS |
702 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
703 | { | |
704 | line_size *= 2; | |
9255ee31 EZ |
705 | visible_line = (char *)xrealloc (visible_line, line_size); |
706 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
d60d9f65 SS |
707 | line = invisible_line; |
708 | } | |
709 | ||
710 | if (in == rl_point) | |
711 | { | |
712 | c_pos = out; | |
713 | lb_linenum = newlines; | |
714 | } | |
715 | ||
9255ee31 EZ |
716 | #if defined (HANDLE_MULTIBYTE) |
717 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
718 | #else | |
d60d9f65 | 719 | if (META_CHAR (c)) |
9255ee31 | 720 | #endif |
d60d9f65 SS |
721 | { |
722 | if (_rl_output_meta_chars == 0) | |
723 | { | |
724 | sprintf (line + out, "\\%o", c); | |
725 | ||
9255ee31 | 726 | if (lpos + 4 >= _rl_screenwidth) |
d60d9f65 | 727 | { |
9255ee31 | 728 | temp = _rl_screenwidth - lpos; |
1b17e766 | 729 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
730 | inv_lbreaks[++newlines] = out + temp; |
731 | lpos = 4 - temp; | |
732 | } | |
733 | else | |
734 | lpos += 4; | |
735 | ||
736 | out += 4; | |
737 | } | |
738 | else | |
739 | { | |
740 | line[out++] = c; | |
741 | CHECK_LPOS(); | |
742 | } | |
743 | } | |
744 | #if defined (DISPLAY_TABS) | |
745 | else if (c == '\t') | |
746 | { | |
9255ee31 | 747 | register int newout; |
c862e87b JM |
748 | |
749 | #if 0 | |
d60d9f65 | 750 | newout = (out | (int)7) + 1; |
c862e87b JM |
751 | #else |
752 | newout = out + 8 - lpos % 8; | |
753 | #endif | |
d60d9f65 | 754 | temp = newout - out; |
9255ee31 | 755 | if (lpos + temp >= _rl_screenwidth) |
d60d9f65 SS |
756 | { |
757 | register int temp2; | |
9255ee31 | 758 | temp2 = _rl_screenwidth - lpos; |
1b17e766 | 759 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
760 | inv_lbreaks[++newlines] = out + temp2; |
761 | lpos = temp - temp2; | |
762 | while (out < newout) | |
763 | line[out++] = ' '; | |
764 | } | |
765 | else | |
766 | { | |
767 | while (out < newout) | |
768 | line[out++] = ' '; | |
769 | lpos += temp; | |
770 | } | |
771 | } | |
772 | #endif | |
9255ee31 | 773 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
c862e87b JM |
774 | { |
775 | line[out++] = '\0'; /* XXX - sentinel */ | |
1b17e766 | 776 | CHECK_INV_LBREAKS (); |
c862e87b JM |
777 | inv_lbreaks[++newlines] = out; |
778 | lpos = 0; | |
779 | } | |
d60d9f65 SS |
780 | else if (CTRL_CHAR (c) || c == RUBOUT) |
781 | { | |
782 | line[out++] = '^'; | |
783 | CHECK_LPOS(); | |
784 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
785 | CHECK_LPOS(); | |
786 | } | |
787 | else | |
788 | { | |
9255ee31 EZ |
789 | #if defined (HANDLE_MULTIBYTE) |
790 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
791 | { | |
792 | register int i; | |
793 | ||
794 | _rl_wrapped_multicolumn = 0; | |
795 | ||
796 | if (_rl_screenwidth < lpos + wc_width) | |
797 | for (i = lpos; i < _rl_screenwidth; i++) | |
798 | { | |
799 | /* The space will be removed in update_line() */ | |
800 | line[out++] = ' '; | |
801 | _rl_wrapped_multicolumn++; | |
802 | CHECK_LPOS(); | |
803 | } | |
804 | if (in == rl_point) | |
805 | { | |
806 | c_pos = out; | |
807 | lb_linenum = newlines; | |
808 | } | |
809 | for (i = in; i < in+wc_bytes; i++) | |
810 | line[out++] = rl_line_buffer[i]; | |
811 | for (i = 0; i < wc_width; i++) | |
812 | CHECK_LPOS(); | |
813 | } | |
814 | else | |
815 | { | |
816 | line[out++] = c; | |
817 | CHECK_LPOS(); | |
818 | } | |
819 | #else | |
d60d9f65 SS |
820 | line[out++] = c; |
821 | CHECK_LPOS(); | |
9255ee31 | 822 | #endif |
d60d9f65 | 823 | } |
9255ee31 EZ |
824 | |
825 | #if defined (HANDLE_MULTIBYTE) | |
826 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
827 | { | |
828 | in += wc_bytes; | |
829 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
830 | } | |
831 | else | |
832 | in++; | |
833 | #endif | |
834 | ||
d60d9f65 SS |
835 | } |
836 | line[out] = '\0'; | |
837 | if (c_pos < 0) | |
838 | { | |
839 | c_pos = out; | |
840 | lb_linenum = newlines; | |
841 | } | |
842 | ||
843 | inv_botlin = lb_botlin = newlines; | |
1b17e766 | 844 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
845 | inv_lbreaks[newlines+1] = out; |
846 | cursor_linenum = lb_linenum; | |
847 | ||
9255ee31 EZ |
848 | /* C_POS == position in buffer where cursor should be placed. |
849 | CURSOR_LINENUM == line number where the cursor should be placed. */ | |
d60d9f65 SS |
850 | |
851 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
852 | line buffers are really multiple lines, which would wrap every | |
853 | (screenwidth - 1) characters. Go through each in turn, finding | |
854 | the changed region and updating it. The line order is top to bottom. */ | |
855 | ||
856 | /* If we can move the cursor up and down, then use multiple lines, | |
857 | otherwise, let long lines display in a single terminal line, and | |
858 | horizontally scroll it. */ | |
859 | ||
9255ee31 | 860 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
d60d9f65 | 861 | { |
5bdf8622 | 862 | int nleft, pos, changed_screen_line, tx; |
d60d9f65 SS |
863 | |
864 | if (!rl_display_fixed || forced_display) | |
865 | { | |
866 | forced_display = 0; | |
867 | ||
868 | /* If we have more than a screenful of material to display, then | |
869 | only display a screenful. We should display the last screen, | |
870 | not the first. */ | |
9255ee31 EZ |
871 | if (out >= _rl_screenchars) |
872 | { | |
873 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
874 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
875 | else | |
876 | out = _rl_screenchars - 1; | |
877 | } | |
d60d9f65 SS |
878 | |
879 | /* The first line is at character position 0 in the buffer. The | |
880 | second and subsequent lines start at inv_lbreaks[N], offset by | |
881 | OFFSET (which has already been calculated above). */ | |
882 | ||
883 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
884 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) | |
885 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
886 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
887 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) | |
888 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) | |
889 | ||
890 | /* For each line in the buffer, do the updating display. */ | |
891 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
892 | { | |
5bdf8622 DJ |
893 | o_cpos = _rl_last_c_pos; |
894 | cpos_adjusted = 0; | |
d60d9f65 SS |
895 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
896 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); | |
897 | ||
5bdf8622 DJ |
898 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
899 | take invisible characters into account, since _rl_last_c_pos | |
900 | is an absolute cursor position in a multibyte locale. See | |
901 | if compensating here is the right thing, or if we have to | |
902 | change update_line itself. There is one case in which | |
903 | update_line adjusts _rl_last_c_pos itself (so it can pass | |
904 | _rl_move_cursor_relative accurate values); it communicates | |
905 | this back by setting cpos_adjusted */ | |
906 | if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && | |
907 | cpos_adjusted == 0 && | |
908 | _rl_last_c_pos != o_cpos && | |
909 | _rl_last_c_pos > wrap_offset && | |
910 | o_cpos < prompt_last_invisible) | |
911 | _rl_last_c_pos -= wrap_offset; | |
912 | ||
d60d9f65 SS |
913 | /* If this is the line with the prompt, we might need to |
914 | compensate for invisible characters in the new line. Do | |
915 | this only if there is not more than one new line (which | |
916 | implies that we completely overwrite the old visible line) | |
917 | and the new line is shorter than the old. Make sure we are | |
918 | at the end of the new line before clearing. */ | |
919 | if (linenum == 0 && | |
920 | inv_botlin == 0 && _rl_last_c_pos == out && | |
921 | (wrap_offset > visible_wrap_offset) && | |
922 | (_rl_last_c_pos < visible_first_line_len)) | |
923 | { | |
5bdf8622 DJ |
924 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
925 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
926 | else | |
927 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
d60d9f65 SS |
928 | if (nleft) |
929 | _rl_clear_to_eol (nleft); | |
930 | } | |
931 | ||
932 | /* Since the new first line is now visible, save its length. */ | |
933 | if (linenum == 0) | |
934 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; | |
935 | } | |
936 | ||
937 | /* We may have deleted some lines. If so, clear the left over | |
938 | blank ones at the bottom out. */ | |
939 | if (_rl_vis_botlin > inv_botlin) | |
940 | { | |
941 | char *tt; | |
942 | for (; linenum <= _rl_vis_botlin; linenum++) | |
943 | { | |
944 | tt = VIS_CHARS (linenum); | |
945 | _rl_move_vert (linenum); | |
946 | _rl_move_cursor_relative (0, tt); | |
947 | _rl_clear_to_eol | |
9255ee31 | 948 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
d60d9f65 SS |
949 | } |
950 | } | |
951 | _rl_vis_botlin = inv_botlin; | |
952 | ||
953 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a | |
954 | different screen line during this redisplay. */ | |
955 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
956 | if (changed_screen_line) | |
957 | { | |
958 | _rl_move_vert (cursor_linenum); | |
9255ee31 | 959 | /* If we moved up to the line with the prompt using _rl_term_up, |
c862e87b JM |
960 | the physical cursor position on the screen stays the same, |
961 | but the buffer position needs to be adjusted to account | |
962 | for invisible characters. */ | |
5bdf8622 | 963 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
c862e87b | 964 | _rl_last_c_pos += wrap_offset; |
d60d9f65 SS |
965 | } |
966 | ||
967 | /* We have to reprint the prompt if it contains invisible | |
968 | characters, since it's not generally OK to just reprint | |
969 | the characters from the current cursor position. But we | |
970 | only need to reprint it if the cursor is before the last | |
971 | invisible character in the prompt string. */ | |
9255ee31 | 972 | nleft = prompt_visible_length + wrap_offset; |
d60d9f65 | 973 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
9255ee31 | 974 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
d60d9f65 | 975 | { |
771578d1 SS |
976 | #if defined (__MSDOS__) |
977 | putc ('\r', rl_outstream); | |
978 | #else | |
9255ee31 EZ |
979 | if (_rl_term_cr) |
980 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
771578d1 | 981 | #endif |
d60d9f65 | 982 | _rl_output_some_chars (local_prompt, nleft); |
9255ee31 | 983 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5bdf8622 | 984 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft) - wrap_offset; |
9255ee31 EZ |
985 | else |
986 | _rl_last_c_pos = nleft; | |
d60d9f65 SS |
987 | } |
988 | ||
989 | /* Where on that line? And where does that line start | |
990 | in the buffer? */ | |
991 | pos = inv_lbreaks[cursor_linenum]; | |
992 | /* nleft == number of characters in the line buffer between the | |
993 | start of the line and the cursor position. */ | |
994 | nleft = c_pos - pos; | |
995 | ||
5bdf8622 DJ |
996 | /* NLEFT is now a number of characters in a buffer. When in a |
997 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
998 | position that doesn't take invisible characters in the prompt | |
999 | into account. We use a fudge factor to compensate. */ | |
1000 | ||
d60d9f65 SS |
1001 | /* Since _rl_backspace() doesn't know about invisible characters in the |
1002 | prompt, and there's no good way to tell it, we compensate for | |
1003 | those characters here and call _rl_backspace() directly. */ | |
1004 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) | |
1005 | { | |
9255ee31 | 1006 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5bdf8622 | 1007 | tx = _rl_col_width (&visible_line[pos], 0, nleft) - visible_wrap_offset; |
9255ee31 | 1008 | else |
5bdf8622 DJ |
1009 | tx = nleft; |
1010 | if (_rl_last_c_pos > tx) | |
1011 | { | |
1012 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ | |
1013 | _rl_last_c_pos = tx; | |
1014 | } | |
d60d9f65 SS |
1015 | } |
1016 | ||
5bdf8622 DJ |
1017 | /* We need to note that in a multibyte locale we are dealing with |
1018 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1019 | point specified by a buffer position (NLEFT) that doesn't take | |
1020 | invisible characters into account. */ | |
9255ee31 EZ |
1021 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1022 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
1023 | else if (nleft != _rl_last_c_pos) | |
d60d9f65 SS |
1024 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1025 | } | |
1026 | } | |
1027 | else /* Do horizontal scrolling. */ | |
1028 | { | |
1029 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1030 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1031 | ||
1032 | /* Always at top line. */ | |
1033 | _rl_last_v_pos = 0; | |
1034 | ||
1035 | /* Compute where in the buffer the displayed line should start. This | |
1036 | will be LMARGIN. */ | |
1037 | ||
1038 | /* The number of characters that will be displayed before the cursor. */ | |
1039 | ndisp = c_pos - wrap_offset; | |
9255ee31 | 1040 | nleft = prompt_visible_length + wrap_offset; |
d60d9f65 | 1041 | /* Where the new cursor position will be on the screen. This can be |
c862e87b | 1042 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
d60d9f65 | 1043 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
9255ee31 | 1044 | t = _rl_screenwidth / 3; |
d60d9f65 SS |
1045 | |
1046 | /* If the number of characters had already exceeded the screenwidth, | |
c862e87b | 1047 | last_lmargin will be > 0. */ |
d60d9f65 SS |
1048 | |
1049 | /* If the number of characters to be displayed is more than the screen | |
c862e87b JM |
1050 | width, compute the starting offset so that the cursor is about |
1051 | two-thirds of the way across the screen. */ | |
9255ee31 | 1052 | if (phys_c_pos > _rl_screenwidth - 2) |
d60d9f65 SS |
1053 | { |
1054 | lmargin = c_pos - (2 * t); | |
1055 | if (lmargin < 0) | |
1056 | lmargin = 0; | |
1057 | /* If the left margin would be in the middle of a prompt with | |
1058 | invisible characters, don't display the prompt at all. */ | |
1059 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1060 | lmargin = nleft; | |
1061 | } | |
9255ee31 | 1062 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
c862e87b | 1063 | lmargin = 0; |
d60d9f65 SS |
1064 | else if (phys_c_pos < 1) |
1065 | { | |
1066 | /* If we are moving back towards the beginning of the line and | |
1067 | the last margin is no longer correct, compute a new one. */ | |
1068 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ | |
1069 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1070 | lmargin = nleft; | |
1071 | } | |
1072 | else | |
c862e87b | 1073 | lmargin = last_lmargin; |
d60d9f65 SS |
1074 | |
1075 | /* If the first character on the screen isn't the first character | |
1076 | in the display line, indicate this with a special character. */ | |
1077 | if (lmargin > 0) | |
1078 | line[lmargin] = '<'; | |
1079 | ||
1080 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
c862e87b JM |
1081 | the whole line, indicate that with a special character at the |
1082 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1083 | wrap offset into account. */ | |
9255ee31 | 1084 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
d60d9f65 | 1085 | if (t < out) |
c862e87b | 1086 | line[t - 1] = '>'; |
d60d9f65 SS |
1087 | |
1088 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
1089 | { | |
1090 | forced_display = 0; | |
1091 | update_line (&visible_line[last_lmargin], | |
1092 | &invisible_line[lmargin], | |
1093 | 0, | |
9255ee31 EZ |
1094 | _rl_screenwidth + visible_wrap_offset, |
1095 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
d60d9f65 SS |
1096 | 0); |
1097 | ||
1098 | /* If the visible new line is shorter than the old, but the number | |
1099 | of invisible characters is greater, and we are at the end of | |
1100 | the new line, we need to clear to eol. */ | |
1101 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1102 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1103 | (_rl_last_c_pos == out) && | |
1104 | t < visible_first_line_len) | |
1105 | { | |
9255ee31 | 1106 | nleft = _rl_screenwidth - t; |
d60d9f65 SS |
1107 | _rl_clear_to_eol (nleft); |
1108 | } | |
1109 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
9255ee31 EZ |
1110 | if (visible_first_line_len > _rl_screenwidth) |
1111 | visible_first_line_len = _rl_screenwidth; | |
d60d9f65 SS |
1112 | |
1113 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); | |
1114 | last_lmargin = lmargin; | |
1115 | } | |
1116 | } | |
1117 | fflush (rl_outstream); | |
1118 | ||
1119 | /* Swap visible and non-visible lines. */ | |
1120 | { | |
9255ee31 | 1121 | char *vtemp = visible_line; |
1b17e766 EZ |
1122 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
1123 | ||
d60d9f65 | 1124 | visible_line = invisible_line; |
9255ee31 | 1125 | invisible_line = vtemp; |
1b17e766 | 1126 | |
d60d9f65 SS |
1127 | vis_lbreaks = inv_lbreaks; |
1128 | inv_lbreaks = itemp; | |
1b17e766 EZ |
1129 | |
1130 | vis_lbsize = inv_lbsize; | |
1131 | inv_lbsize = ntemp; | |
1132 | ||
d60d9f65 SS |
1133 | rl_display_fixed = 0; |
1134 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1135 | are not displaying any invisible characters, so set visible_wrap_offset | |
1136 | to 0. */ | |
1137 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1138 | visible_wrap_offset = 0; | |
1139 | else | |
1140 | visible_wrap_offset = wrap_offset; | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | /* PWP: update_line() is based on finding the middle difference of each | |
1145 | line on the screen; vis: | |
1146 | ||
1147 | /old first difference | |
1148 | /beginning of line | /old last same /old EOL | |
1149 | v v v v | |
1150 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1151 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1152 | ^ ^ ^ ^ | |
1153 | \beginning of line | \new last same \new end of line | |
1154 | \new first difference | |
1155 | ||
1156 | All are character pointers for the sake of speed. Special cases for | |
c862e87b | 1157 | no differences, as well as for end of line additions must be handled. |
d60d9f65 SS |
1158 | |
1159 | Could be made even smarter, but this works well enough */ | |
1160 | static void | |
1161 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1162 | register char *old, *new; | |
1163 | int current_line, omax, nmax, inv_botlin; | |
1164 | { | |
1165 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
1166 | int temp, lendiff, wsatend, od, nd; | |
1167 | int current_invis_chars; | |
9255ee31 EZ |
1168 | int col_lendiff, col_temp; |
1169 | #if defined (HANDLE_MULTIBYTE) | |
1170 | mbstate_t ps_new, ps_old; | |
1171 | int new_offset, old_offset, tmp; | |
1172 | #endif | |
d60d9f65 SS |
1173 | |
1174 | /* If we're at the right edge of a terminal that supports xn, we're | |
1175 | ready to wrap around, so do so. This fixes problems with knowing | |
1176 | the exact cursor position and cut-and-paste with certain terminal | |
1177 | emulators. In this calculation, TEMP is the physical screen | |
1178 | position of the cursor. */ | |
5bdf8622 DJ |
1179 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1180 | temp = _rl_last_c_pos; | |
1181 | else | |
1182 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
9255ee31 EZ |
1183 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
1184 | && _rl_last_v_pos == current_line - 1) | |
d60d9f65 | 1185 | { |
9255ee31 EZ |
1186 | #if defined (HANDLE_MULTIBYTE) |
1187 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1188 | { | |
1189 | wchar_t wc; | |
1190 | mbstate_t ps; | |
1191 | int tempwidth, bytes; | |
1192 | size_t ret; | |
1193 | ||
1194 | /* This fixes only double-column characters, but if the wrapped | |
1195 | character comsumes more than three columns, spaces will be | |
1196 | inserted in the string buffer. */ | |
1197 | if (_rl_wrapped_line[current_line] > 0) | |
1198 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); | |
1199 | ||
1200 | memset (&ps, 0, sizeof (mbstate_t)); | |
1201 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
5bdf8622 | 1202 | if (MB_INVALIDCH (ret)) |
9255ee31 EZ |
1203 | { |
1204 | tempwidth = 1; | |
1205 | ret = 1; | |
1206 | } | |
5bdf8622 | 1207 | else if (MB_NULLWCH (ret)) |
9255ee31 EZ |
1208 | tempwidth = 0; |
1209 | else | |
1210 | tempwidth = wcwidth (wc); | |
1211 | ||
1212 | if (tempwidth > 0) | |
1213 | { | |
1214 | int count; | |
1215 | bytes = ret; | |
1216 | for (count = 0; count < bytes; count++) | |
1217 | putc (new[count], rl_outstream); | |
1218 | _rl_last_c_pos = tempwidth; | |
1219 | _rl_last_v_pos++; | |
1220 | memset (&ps, 0, sizeof (mbstate_t)); | |
1221 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1222 | if (ret != 0 && bytes != 0) | |
1223 | { | |
5bdf8622 | 1224 | if (MB_INVALIDCH (ret)) |
9255ee31 EZ |
1225 | memmove (old+bytes, old+1, strlen (old+1)); |
1226 | else | |
1227 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1228 | memcpy (old, new, bytes); | |
1229 | } | |
1230 | } | |
1231 | else | |
1232 | { | |
1233 | putc (' ', rl_outstream); | |
1234 | _rl_last_c_pos = 1; | |
1235 | _rl_last_v_pos++; | |
1236 | if (old[0] && new[0]) | |
1237 | old[0] = new[0]; | |
1238 | } | |
1239 | } | |
d60d9f65 | 1240 | else |
9255ee31 EZ |
1241 | #endif |
1242 | { | |
1243 | if (new[0]) | |
1244 | putc (new[0], rl_outstream); | |
1245 | else | |
1246 | putc (' ', rl_outstream); | |
5bdf8622 | 1247 | _rl_last_c_pos = 1; |
9255ee31 EZ |
1248 | _rl_last_v_pos++; |
1249 | if (old[0] && new[0]) | |
1250 | old[0] = new[0]; | |
1251 | } | |
d60d9f65 | 1252 | } |
9255ee31 | 1253 | |
d60d9f65 SS |
1254 | |
1255 | /* Find first difference. */ | |
9255ee31 EZ |
1256 | #if defined (HANDLE_MULTIBYTE) |
1257 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1258 | { | |
5bdf8622 DJ |
1259 | /* See if the old line is a subset of the new line, so that the |
1260 | only change is adding characters. */ | |
1261 | temp = (omax < nmax) ? omax : nmax; | |
1262 | if (memcmp (old, new, temp) == 0) | |
9255ee31 | 1263 | { |
5bdf8622 DJ |
1264 | ofd = old + temp; |
1265 | nfd = new + temp; | |
1266 | } | |
1267 | else | |
1268 | { | |
1269 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1270 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1271 | ||
1272 | if (omax == nmax && STREQN (new, old, omax)) | |
1273 | { | |
1274 | ofd = old + omax; | |
1275 | nfd = new + nmax; | |
1276 | } | |
1277 | else | |
1278 | { | |
1279 | new_offset = old_offset = 0; | |
1280 | for (ofd = old, nfd = new; | |
1281 | (ofd - old < omax) && *ofd && | |
1282 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1283 | { | |
1284 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1285 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1286 | ofd = old + old_offset; | |
1287 | nfd = new + new_offset; | |
1288 | } | |
1289 | } | |
9255ee31 EZ |
1290 | } |
1291 | } | |
1292 | else | |
1293 | #endif | |
d60d9f65 SS |
1294 | for (ofd = old, nfd = new; |
1295 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1296 | ofd++, nfd++) | |
1297 | ; | |
1298 | ||
1299 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1300 | of the distance between ne and new and oe and old, respectively, to | |
1301 | move a subtraction out of each loop. */ | |
1302 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1303 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1304 | ||
1305 | /* If no difference, continue to next line. */ | |
1306 | if (ofd == oe && nfd == ne) | |
1307 | return; | |
1308 | ||
1309 | wsatend = 1; /* flag for trailing whitespace */ | |
9255ee31 EZ |
1310 | |
1311 | #if defined (HANDLE_MULTIBYTE) | |
1312 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1313 | { | |
1314 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1315 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1316 | while ((ols > ofd) && (nls > nfd)) | |
1317 | { | |
1318 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1319 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1320 | ||
5bdf8622 DJ |
1321 | #if 0 |
1322 | /* On advice from jir@yamato.ibm.com */ | |
9255ee31 EZ |
1323 | _rl_adjust_point (old, ols - old, &ps_old); |
1324 | _rl_adjust_point (new, nls - new, &ps_new); | |
5bdf8622 | 1325 | #endif |
9255ee31 EZ |
1326 | |
1327 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1328 | break; | |
1329 | ||
1330 | if (*ols == ' ') | |
1331 | wsatend = 0; | |
1332 | ||
1333 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1334 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1335 | } | |
1336 | } | |
1337 | else | |
1338 | { | |
1339 | #endif /* HANDLE_MULTIBYTE */ | |
d60d9f65 SS |
1340 | ols = oe - 1; /* find last same */ |
1341 | nls = ne - 1; | |
1342 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1343 | { | |
1344 | if (*ols != ' ') | |
1345 | wsatend = 0; | |
1346 | ols--; | |
1347 | nls--; | |
1348 | } | |
9255ee31 EZ |
1349 | #if defined (HANDLE_MULTIBYTE) |
1350 | } | |
1351 | #endif | |
d60d9f65 SS |
1352 | |
1353 | if (wsatend) | |
1354 | { | |
1355 | ols = oe; | |
1356 | nls = ne; | |
1357 | } | |
9255ee31 EZ |
1358 | #if defined (HANDLE_MULTIBYTE) |
1359 | /* This may not work for stateful encoding, but who cares? To handle | |
1360 | stateful encoding properly, we have to scan each string from the | |
1361 | beginning and compare. */ | |
1362 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1363 | #else | |
d60d9f65 | 1364 | else if (*ols != *nls) |
9255ee31 | 1365 | #endif |
d60d9f65 SS |
1366 | { |
1367 | if (*ols) /* don't step past the NUL */ | |
9255ee31 EZ |
1368 | { |
1369 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1370 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1371 | else | |
1372 | ols++; | |
1373 | } | |
d60d9f65 | 1374 | if (*nls) |
9255ee31 EZ |
1375 | { |
1376 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1377 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1378 | else | |
1379 | nls++; | |
1380 | } | |
d60d9f65 SS |
1381 | } |
1382 | ||
1383 | /* count of invisible characters in the current invisible line. */ | |
1384 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1385 | if (_rl_last_v_pos != current_line) | |
1386 | { | |
1387 | _rl_move_vert (current_line); | |
5bdf8622 | 1388 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
d60d9f65 SS |
1389 | _rl_last_c_pos += visible_wrap_offset; |
1390 | } | |
1391 | ||
1392 | /* If this is the first line and there are invisible characters in the | |
1393 | prompt string, and the prompt string has not changed, and the current | |
1394 | cursor position is before the last invisible character in the prompt, | |
1395 | and the index of the character to move to is past the end of the prompt | |
1396 | string, then redraw the entire prompt string. We can only do this | |
1397 | reliably if the terminal supports a `cr' capability. | |
1398 | ||
1399 | This is not an efficiency hack -- there is a problem with redrawing | |
1400 | portions of the prompt string if they contain terminal escape | |
1401 | sequences (like drawing the `unbold' sequence without a corresponding | |
1402 | `bold') that manifests itself on certain terminals. */ | |
1403 | ||
1404 | lendiff = local_prompt ? strlen (local_prompt) : 0; | |
1405 | od = ofd - old; /* index of first difference in visible line */ | |
1406 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
9255ee31 EZ |
1407 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
1408 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) | |
d60d9f65 | 1409 | { |
771578d1 SS |
1410 | #if defined (__MSDOS__) |
1411 | putc ('\r', rl_outstream); | |
1412 | #else | |
9255ee31 | 1413 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1b17e766 | 1414 | #endif |
d60d9f65 | 1415 | _rl_output_some_chars (local_prompt, lendiff); |
9255ee31 | 1416 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5bdf8622 DJ |
1417 | { |
1418 | /* We take wrap_offset into account here so we can pass correct | |
1419 | information to _rl_move_cursor_relative. */ | |
1420 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff) - wrap_offset; | |
1421 | cpos_adjusted = 1; | |
1422 | } | |
9255ee31 EZ |
1423 | else |
1424 | _rl_last_c_pos = lendiff; | |
d60d9f65 SS |
1425 | } |
1426 | ||
1427 | _rl_move_cursor_relative (od, old); | |
1428 | ||
9255ee31 EZ |
1429 | /* if (len (new) > len (old)) |
1430 | lendiff == difference in buffer | |
1431 | col_lendiff == difference on screen | |
1432 | When not using multibyte characters, these are equal */ | |
d60d9f65 | 1433 | lendiff = (nls - nfd) - (ols - ofd); |
9255ee31 EZ |
1434 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1435 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1436 | else | |
1437 | col_lendiff = lendiff; | |
d60d9f65 SS |
1438 | |
1439 | /* If we are changing the number of invisible characters in a line, and | |
1440 | the spot of first difference is before the end of the invisible chars, | |
1441 | lendiff needs to be adjusted. */ | |
1442 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1443 | current_invis_chars != visible_wrap_offset) | |
9255ee31 EZ |
1444 | { |
1445 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1446 | { | |
1447 | lendiff += visible_wrap_offset - current_invis_chars; | |
1448 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1449 | } | |
1450 | else | |
1451 | { | |
1452 | lendiff += visible_wrap_offset - current_invis_chars; | |
1453 | col_lendiff = lendiff; | |
1454 | } | |
1455 | } | |
d60d9f65 SS |
1456 | |
1457 | /* Insert (diff (len (old), len (new)) ch. */ | |
1458 | temp = ne - nfd; | |
9255ee31 EZ |
1459 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1460 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1461 | else | |
1462 | col_temp = temp; | |
1463 | ||
1464 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
d60d9f65 SS |
1465 | { |
1466 | /* Non-zero if we're increasing the number of lines. */ | |
1467 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1468 | /* Sometimes it is cheaper to print the characters rather than | |
1469 | use the terminal's capabilities. If we're growing the number | |
1470 | of lines, make sure we actually cause the new line to wrap | |
1471 | around on auto-wrapping terminals. */ | |
9255ee31 | 1472 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
d60d9f65 | 1473 | { |
9255ee31 | 1474 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
d60d9f65 | 1475 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
9255ee31 | 1476 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
d60d9f65 SS |
1477 | invisible characters. We need to just draw them. */ |
1478 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
9255ee31 | 1479 | lendiff <= prompt_visible_length || !current_invis_chars)) |
d60d9f65 | 1480 | { |
9255ee31 EZ |
1481 | insert_some_chars (nfd, lendiff, col_lendiff); |
1482 | _rl_last_c_pos += col_lendiff; | |
d60d9f65 | 1483 | } |
5bdf8622 | 1484 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
d60d9f65 SS |
1485 | { |
1486 | /* At the end of a line the characters do not have to | |
1487 | be "inserted". They can just be placed on the screen. */ | |
1488 | /* However, this screws up the rest of this block, which | |
c862e87b | 1489 | assumes you've done the insert because you can. */ |
d60d9f65 | 1490 | _rl_output_some_chars (nfd, lendiff); |
9255ee31 | 1491 | _rl_last_c_pos += col_lendiff; |
d60d9f65 SS |
1492 | } |
1493 | else | |
1494 | { | |
1495 | /* We have horizontal scrolling and we are not inserting at | |
1496 | the end. We have invisible characters in this line. This | |
1497 | is a dumb update. */ | |
1498 | _rl_output_some_chars (nfd, temp); | |
9255ee31 | 1499 | _rl_last_c_pos += col_temp; |
d60d9f65 SS |
1500 | return; |
1501 | } | |
1502 | /* Copy (new) chars to screen from first diff to last match. */ | |
1503 | temp = nls - nfd; | |
1504 | if ((temp - lendiff) > 0) | |
1505 | { | |
1506 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
5bdf8622 DJ |
1507 | #if 1 |
1508 | /* XXX -- this bears closer inspection. Fixes a redisplay bug | |
1509 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1510 | multibyte characters and prompt strings with invisible | |
1511 | characters, but was previously disabled. */ | |
9255ee31 | 1512 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); |
288381c0 MC |
1513 | #else |
1514 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff); | |
9255ee31 | 1515 | #endif |
d60d9f65 SS |
1516 | } |
1517 | } | |
1518 | else | |
1519 | { | |
1520 | /* cannot insert chars, write to EOL */ | |
1521 | _rl_output_some_chars (nfd, temp); | |
9255ee31 | 1522 | _rl_last_c_pos += col_temp; |
5bdf8622 DJ |
1523 | /* If we're in a multibyte locale and were before the last invisible |
1524 | char in the current line (which implies we just output some invisible | |
1525 | characters) we need to adjust _rl_last_c_pos, since it represents | |
1526 | a physical character position. */ | |
d60d9f65 SS |
1527 | } |
1528 | } | |
1529 | else /* Delete characters from line. */ | |
1530 | { | |
1531 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
9255ee31 | 1532 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
d60d9f65 SS |
1533 | { |
1534 | /* If all we're doing is erasing the invisible characters in the | |
1535 | prompt string, don't bother. It screws up the assumptions | |
1536 | about what's on the screen. */ | |
1537 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1538 | -lendiff == visible_wrap_offset) | |
9255ee31 | 1539 | col_lendiff = 0; |
d60d9f65 | 1540 | |
9255ee31 EZ |
1541 | if (col_lendiff) |
1542 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
d60d9f65 SS |
1543 | |
1544 | /* Copy (new) chars to screen from first diff to last match */ | |
1545 | temp = nls - nfd; | |
1546 | if (temp > 0) | |
1547 | { | |
1548 | _rl_output_some_chars (nfd, temp); | |
9255ee31 | 1549 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp);; |
d60d9f65 SS |
1550 | } |
1551 | } | |
1552 | /* Otherwise, print over the existing material. */ | |
1553 | else | |
1554 | { | |
1555 | if (temp > 0) | |
1556 | { | |
1557 | _rl_output_some_chars (nfd, temp); | |
5bdf8622 | 1558 | _rl_last_c_pos += col_temp; /* XXX */ |
d60d9f65 SS |
1559 | } |
1560 | lendiff = (oe - old) - (ne - new); | |
9255ee31 EZ |
1561 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1562 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1563 | else | |
1564 | col_lendiff = lendiff; | |
1565 | ||
1566 | if (col_lendiff) | |
c862e87b JM |
1567 | { |
1568 | if (_rl_term_autowrap && current_line < inv_botlin) | |
9255ee31 | 1569 | space_to_eol (col_lendiff); |
c862e87b | 1570 | else |
9255ee31 | 1571 | _rl_clear_to_eol (col_lendiff); |
c862e87b | 1572 | } |
d60d9f65 SS |
1573 | } |
1574 | } | |
1575 | } | |
1576 | ||
1577 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
1578 | int | |
1579 | rl_on_new_line () | |
1580 | { | |
1581 | if (visible_line) | |
1582 | visible_line[0] = '\0'; | |
1583 | ||
1584 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1585 | _rl_vis_botlin = last_lmargin = 0; | |
1586 | if (vis_lbreaks) | |
1587 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1588 | visible_wrap_offset = 0; | |
1589 | return 0; | |
1590 | } | |
1591 | ||
1b17e766 EZ |
1592 | /* Tell the update routines that we have moved onto a new line with the |
1593 | prompt already displayed. Code originally from the version of readline | |
5bdf8622 DJ |
1594 | distributed with CLISP. rl_expand_prompt must have already been called |
1595 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
1b17e766 EZ |
1596 | int |
1597 | rl_on_new_line_with_prompt () | |
1598 | { | |
1599 | int prompt_size, i, l, real_screenwidth, newlines; | |
5bdf8622 | 1600 | char *prompt_last_line, *lprompt; |
1b17e766 EZ |
1601 | |
1602 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1603 | the already-displayed prompt. */ | |
1604 | prompt_size = strlen (rl_prompt) + 1; | |
1605 | init_line_structures (prompt_size); | |
1606 | ||
1607 | /* Make sure the line structures hold the already-displayed prompt for | |
1608 | redisplay. */ | |
5bdf8622 DJ |
1609 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1610 | strcpy (visible_line, lprompt); | |
1611 | strcpy (invisible_line, lprompt); | |
1b17e766 EZ |
1612 | |
1613 | /* If the prompt contains newlines, take the last tail. */ | |
1614 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1615 | if (!prompt_last_line) | |
1616 | prompt_last_line = rl_prompt; | |
1617 | ||
1618 | l = strlen (prompt_last_line); | |
9255ee31 | 1619 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5bdf8622 | 1620 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); /* XXX */ |
9255ee31 EZ |
1621 | else |
1622 | _rl_last_c_pos = l; | |
1b17e766 EZ |
1623 | |
1624 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1625 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1626 | one less, see terminal.c. */ | |
9255ee31 | 1627 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
1b17e766 EZ |
1628 | _rl_last_v_pos = l / real_screenwidth; |
1629 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1630 | whether the cursor is at the end of the last line, or already at the | |
1631 | beginning of the next line. Output a newline just to be safe. */ | |
1632 | if (l > 0 && (l % real_screenwidth) == 0) | |
1633 | _rl_output_some_chars ("\n", 1); | |
1634 | last_lmargin = 0; | |
1635 | ||
1636 | newlines = 0; i = 0; | |
1637 | while (i <= l) | |
1638 | { | |
1639 | _rl_vis_botlin = newlines; | |
1640 | vis_lbreaks[newlines++] = i; | |
1641 | i += real_screenwidth; | |
1642 | } | |
1643 | vis_lbreaks[newlines] = l; | |
1644 | visible_wrap_offset = 0; | |
1645 | ||
5bdf8622 DJ |
1646 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1647 | ||
1b17e766 EZ |
1648 | return 0; |
1649 | } | |
1650 | ||
d60d9f65 SS |
1651 | /* Actually update the display, period. */ |
1652 | int | |
1653 | rl_forced_update_display () | |
1654 | { | |
1655 | if (visible_line) | |
1656 | { | |
1657 | register char *temp = visible_line; | |
1658 | ||
1659 | while (*temp) | |
c862e87b | 1660 | *temp++ = '\0'; |
d60d9f65 SS |
1661 | } |
1662 | rl_on_new_line (); | |
1663 | forced_display++; | |
1664 | (*rl_redisplay_function) (); | |
1665 | return 0; | |
1666 | } | |
1667 | ||
1668 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
5bdf8622 DJ |
1669 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
1670 | buffer index.) | |
d60d9f65 SS |
1671 | DATA is the contents of the screen line of interest; i.e., where |
1672 | the movement is being done. */ | |
1673 | void | |
1674 | _rl_move_cursor_relative (new, data) | |
1675 | int new; | |
9255ee31 | 1676 | const char *data; |
d60d9f65 SS |
1677 | { |
1678 | register int i; | |
5bdf8622 DJ |
1679 | int woff; /* number of invisible chars on current line */ |
1680 | int cpos, dpos; /* current and desired cursor positions */ | |
d60d9f65 | 1681 | |
5bdf8622 DJ |
1682 | woff = W_OFFSET (_rl_last_v_pos, wrap_offset); |
1683 | cpos = _rl_last_c_pos; | |
9255ee31 EZ |
1684 | #if defined (HANDLE_MULTIBYTE) |
1685 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1686 | a multibyte string, but _rl_last_c_pos is the display position. In | |
288381c0 | 1687 | this case, NEW's display position is not obvious and must be |
5bdf8622 DJ |
1688 | calculated. We need to account for invisible characters in this line, |
1689 | as long as we are past them and they are counted by _rl_col_width. */ | |
1690 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
288381c0 | 1691 | { |
5bdf8622 DJ |
1692 | dpos = _rl_col_width (data, 0, new); |
1693 | if (dpos > woff) | |
1694 | dpos -= woff; | |
288381c0 | 1695 | } |
5bdf8622 | 1696 | else |
9255ee31 | 1697 | #endif |
5bdf8622 DJ |
1698 | dpos = new; |
1699 | ||
1700 | /* If we don't have to do anything, then return. */ | |
1701 | if (cpos == dpos) | |
1702 | return; | |
d60d9f65 SS |
1703 | |
1704 | /* It may be faster to output a CR, and then move forwards instead | |
1705 | of moving backwards. */ | |
1706 | /* i == current physical cursor position. */ | |
5bdf8622 DJ |
1707 | #if defined (HANDLE_MULTIBYTE) |
1708 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1709 | i = _rl_last_c_pos; | |
1710 | else | |
1711 | #endif | |
1712 | i = _rl_last_c_pos - woff; | |
d60d9f65 | 1713 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || |
9255ee31 | 1714 | (_rl_term_autowrap && i == _rl_screenwidth)) |
d60d9f65 SS |
1715 | { |
1716 | #if defined (__MSDOS__) | |
1717 | putc ('\r', rl_outstream); | |
1718 | #else | |
9255ee31 | 1719 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
d60d9f65 | 1720 | #endif /* !__MSDOS__ */ |
5bdf8622 | 1721 | cpos = _rl_last_c_pos = 0; |
d60d9f65 SS |
1722 | } |
1723 | ||
5bdf8622 | 1724 | if (cpos < dpos) |
d60d9f65 SS |
1725 | { |
1726 | /* Move the cursor forward. We do it by printing the command | |
1727 | to move the cursor forward if there is one, else print that | |
1728 | portion of the output buffer again. Which is cheaper? */ | |
1729 | ||
1730 | /* The above comment is left here for posterity. It is faster | |
1731 | to print one character (non-control) than to print a control | |
1732 | sequence telling the terminal to move forward one character. | |
1733 | That kind of control is for people who don't know what the | |
1734 | data is underneath the cursor. */ | |
1735 | #if defined (HACK_TERMCAP_MOTION) | |
9255ee31 EZ |
1736 | if (_rl_term_forward_char) |
1737 | { | |
5bdf8622 DJ |
1738 | for (i = cpos; i < dpos; i++) |
1739 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
9255ee31 EZ |
1740 | } |
1741 | else | |
5bdf8622 | 1742 | #endif /* HACK_TERMCAP_MOTION */ |
9255ee31 EZ |
1743 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1744 | { | |
1745 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1746 | for (i = 0; i < new; i++) | |
1747 | putc (data[i], rl_outstream); | |
1748 | } | |
d60d9f65 | 1749 | else |
5bdf8622 | 1750 | for (i = cpos; i < new; i++) |
d60d9f65 | 1751 | putc (data[i], rl_outstream); |
d60d9f65 | 1752 | } |
5bdf8622 | 1753 | |
9255ee31 EZ |
1754 | #if defined (HANDLE_MULTIBYTE) |
1755 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1756 | The byte length of the string is probably bigger than the column width | |
1757 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1758 | display point is less than _rl_last_c_pos. */ | |
9255ee31 | 1759 | #endif |
5bdf8622 DJ |
1760 | else if (cpos > dpos) |
1761 | _rl_backspace (cpos - dpos); | |
9255ee31 | 1762 | |
5bdf8622 | 1763 | _rl_last_c_pos = dpos; |
d60d9f65 SS |
1764 | } |
1765 | ||
1766 | /* PWP: move the cursor up or down. */ | |
1767 | void | |
1768 | _rl_move_vert (to) | |
1769 | int to; | |
1770 | { | |
1771 | register int delta, i; | |
1772 | ||
9255ee31 | 1773 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
d60d9f65 SS |
1774 | return; |
1775 | ||
d60d9f65 SS |
1776 | if ((delta = to - _rl_last_v_pos) > 0) |
1777 | { | |
1778 | for (i = 0; i < delta; i++) | |
1779 | putc ('\n', rl_outstream); | |
1b17e766 EZ |
1780 | #if defined (__MSDOS__) |
1781 | putc ('\r', rl_outstream); | |
1782 | #else | |
9255ee31 | 1783 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1b17e766 | 1784 | #endif |
d60d9f65 SS |
1785 | _rl_last_c_pos = 0; |
1786 | } | |
1787 | else | |
1788 | { /* delta < 0 */ | |
30083a32 EZ |
1789 | #ifdef __MSDOS__ |
1790 | int row, col; | |
1791 | ||
b0f0a30e | 1792 | fflush (rl_outstream); /* make sure the cursor pos is current! */ |
30083a32 | 1793 | ScreenGetCursor (&row, &col); |
b0f0a30e EZ |
1794 | ScreenSetCursor (row + delta, col); |
1795 | i = -delta; /* in case someone wants to use it after the loop */ | |
30083a32 | 1796 | #else /* !__MSDOS__ */ |
9255ee31 | 1797 | if (_rl_term_up && *_rl_term_up) |
d60d9f65 | 1798 | for (i = 0; i < -delta; i++) |
9255ee31 | 1799 | tputs (_rl_term_up, 1, _rl_output_character_function); |
30083a32 | 1800 | #endif /* !__MSDOS__ */ |
d60d9f65 | 1801 | } |
1b17e766 | 1802 | |
d60d9f65 SS |
1803 | _rl_last_v_pos = to; /* Now TO is here */ |
1804 | } | |
1805 | ||
1806 | /* Physically print C on rl_outstream. This is for functions which know | |
1807 | how to optimize the display. Return the number of characters output. */ | |
1808 | int | |
1809 | rl_show_char (c) | |
1810 | int c; | |
1811 | { | |
1812 | int n = 1; | |
1813 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1814 | { | |
1815 | fprintf (rl_outstream, "M-"); | |
1816 | n += 2; | |
1817 | c = UNMETA (c); | |
1818 | } | |
1819 | ||
1820 | #if defined (DISPLAY_TABS) | |
1821 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) | |
1822 | #else | |
1823 | if (CTRL_CHAR (c) || c == RUBOUT) | |
1824 | #endif /* !DISPLAY_TABS */ | |
1825 | { | |
1826 | fprintf (rl_outstream, "C-"); | |
1827 | n += 2; | |
1828 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
1829 | } | |
1830 | ||
1831 | putc (c, rl_outstream); | |
1832 | fflush (rl_outstream); | |
1833 | return n; | |
1834 | } | |
1835 | ||
1836 | int | |
1837 | rl_character_len (c, pos) | |
1838 | register int c, pos; | |
1839 | { | |
1840 | unsigned char uc; | |
1841 | ||
1842 | uc = (unsigned char)c; | |
1843 | ||
1844 | if (META_CHAR (uc)) | |
1845 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1846 | ||
1847 | if (uc == '\t') | |
1848 | { | |
1849 | #if defined (DISPLAY_TABS) | |
1850 | return (((pos | 7) + 1) - pos); | |
1851 | #else | |
1852 | return (2); | |
1853 | #endif /* !DISPLAY_TABS */ | |
1854 | } | |
1855 | ||
1856 | if (CTRL_CHAR (c) || c == RUBOUT) | |
1857 | return (2); | |
1858 | ||
9255ee31 | 1859 | return ((ISPRINT (uc)) ? 1 : 2); |
d60d9f65 | 1860 | } |
d60d9f65 SS |
1861 | /* How to print things in the "echo-area". The prompt is treated as a |
1862 | mini-modeline. */ | |
5bdf8622 | 1863 | static int msg_saved_prompt = 0; |
d60d9f65 SS |
1864 | |
1865 | #if defined (USE_VARARGS) | |
1866 | int | |
1867 | #if defined (PREFER_STDARG) | |
1868 | rl_message (const char *format, ...) | |
1869 | #else | |
1870 | rl_message (va_alist) | |
1871 | va_dcl | |
1872 | #endif | |
1873 | { | |
1874 | va_list args; | |
1875 | #if defined (PREFER_VARARGS) | |
1876 | char *format; | |
1877 | #endif | |
1878 | ||
1879 | #if defined (PREFER_STDARG) | |
1880 | va_start (args, format); | |
1881 | #else | |
1882 | va_start (args); | |
1883 | format = va_arg (args, char *); | |
1884 | #endif | |
1885 | ||
9255ee31 EZ |
1886 | #if defined (HAVE_VSNPRINTF) |
1887 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
1888 | #else | |
d60d9f65 | 1889 | vsprintf (msg_buf, format, args); |
9255ee31 EZ |
1890 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1891 | #endif | |
d60d9f65 SS |
1892 | va_end (args); |
1893 | ||
5bdf8622 DJ |
1894 | if (saved_local_prompt == 0) |
1895 | { | |
1896 | rl_save_prompt (); | |
1897 | msg_saved_prompt = 1; | |
1898 | } | |
d60d9f65 | 1899 | rl_display_prompt = msg_buf; |
5bdf8622 DJ |
1900 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
1901 | &prompt_last_invisible, | |
1902 | &prompt_invis_chars_first_line, | |
1903 | &prompt_physical_chars); | |
1904 | local_prompt_prefix = (char *)NULL; | |
d60d9f65 | 1905 | (*rl_redisplay_function) (); |
5bdf8622 | 1906 | |
d60d9f65 SS |
1907 | return 0; |
1908 | } | |
1909 | #else /* !USE_VARARGS */ | |
1910 | int | |
1911 | rl_message (format, arg1, arg2) | |
1912 | char *format; | |
1913 | { | |
1914 | sprintf (msg_buf, format, arg1, arg2); | |
9255ee31 | 1915 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
5bdf8622 | 1916 | |
d60d9f65 | 1917 | rl_display_prompt = msg_buf; |
5bdf8622 DJ |
1918 | if (saved_local_prompt == 0) |
1919 | { | |
1920 | rl_save_prompt (); | |
1921 | msg_saved_prompt = 1; | |
1922 | } | |
1923 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, | |
1924 | &prompt_last_invisible, | |
1925 | &prompt_invis_chars_first_line, | |
1926 | &prompt_physical_chars); | |
1927 | local_prompt_prefix = (char *)NULL; | |
d60d9f65 | 1928 | (*rl_redisplay_function) (); |
5bdf8622 | 1929 | |
d60d9f65 SS |
1930 | return 0; |
1931 | } | |
1932 | #endif /* !USE_VARARGS */ | |
1933 | ||
1934 | /* How to clear things from the "echo-area". */ | |
1935 | int | |
1936 | rl_clear_message () | |
1937 | { | |
1938 | rl_display_prompt = rl_prompt; | |
5bdf8622 DJ |
1939 | if (msg_saved_prompt) |
1940 | { | |
1941 | rl_restore_prompt (); | |
1942 | msg_saved_prompt = 0; | |
1943 | } | |
d60d9f65 SS |
1944 | (*rl_redisplay_function) (); |
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | int | |
1949 | rl_reset_line_state () | |
1950 | { | |
1951 | rl_on_new_line (); | |
1952 | ||
1953 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
1954 | forced_display = 1; | |
1955 | return 0; | |
1956 | } | |
1957 | ||
d60d9f65 | 1958 | void |
c862e87b | 1959 | rl_save_prompt () |
d60d9f65 SS |
1960 | { |
1961 | saved_local_prompt = local_prompt; | |
1962 | saved_local_prefix = local_prompt_prefix; | |
5bdf8622 | 1963 | saved_prefix_length = prompt_prefix_length; |
9255ee31 EZ |
1964 | saved_last_invisible = prompt_last_invisible; |
1965 | saved_visible_length = prompt_visible_length; | |
5bdf8622 DJ |
1966 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
1967 | saved_physical_chars = prompt_physical_chars; | |
d60d9f65 SS |
1968 | |
1969 | local_prompt = local_prompt_prefix = (char *)0; | |
5bdf8622 DJ |
1970 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
1971 | prompt_invis_chars_first_line = prompt_physical_chars = 0; | |
d60d9f65 SS |
1972 | } |
1973 | ||
1974 | void | |
c862e87b | 1975 | rl_restore_prompt () |
d60d9f65 | 1976 | { |
9255ee31 EZ |
1977 | FREE (local_prompt); |
1978 | FREE (local_prompt_prefix); | |
d60d9f65 SS |
1979 | |
1980 | local_prompt = saved_local_prompt; | |
1981 | local_prompt_prefix = saved_local_prefix; | |
5bdf8622 | 1982 | prompt_prefix_length = saved_prefix_length; |
9255ee31 EZ |
1983 | prompt_last_invisible = saved_last_invisible; |
1984 | prompt_visible_length = saved_visible_length; | |
5bdf8622 DJ |
1985 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
1986 | prompt_physical_chars = saved_physical_chars; | |
1987 | ||
1988 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
1989 | saved_local_prompt = saved_local_prefix = (char *)0; | |
1990 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; | |
1991 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
d60d9f65 SS |
1992 | } |
1993 | ||
1994 | char * | |
1995 | _rl_make_prompt_for_search (pchar) | |
1996 | int pchar; | |
1997 | { | |
1998 | int len; | |
5bdf8622 | 1999 | char *pmt, *p; |
d60d9f65 | 2000 | |
c862e87b | 2001 | rl_save_prompt (); |
d60d9f65 | 2002 | |
5bdf8622 DJ |
2003 | /* We've saved the prompt, and can do anything with the various prompt |
2004 | strings we need before they're restored. We want the unexpanded | |
2005 | portion of the prompt string after any final newline. */ | |
2006 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; | |
2007 | if (p == 0) | |
d60d9f65 SS |
2008 | { |
2009 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
9255ee31 | 2010 | pmt = (char *)xmalloc (len + 2); |
d60d9f65 | 2011 | if (len) |
c862e87b | 2012 | strcpy (pmt, rl_prompt); |
d60d9f65 SS |
2013 | pmt[len] = pchar; |
2014 | pmt[len+1] = '\0'; | |
2015 | } | |
2016 | else | |
2017 | { | |
5bdf8622 DJ |
2018 | p++; |
2019 | len = strlen (p); | |
9255ee31 | 2020 | pmt = (char *)xmalloc (len + 2); |
d60d9f65 | 2021 | if (len) |
5bdf8622 | 2022 | strcpy (pmt, p); |
d60d9f65 SS |
2023 | pmt[len] = pchar; |
2024 | pmt[len+1] = '\0'; | |
5bdf8622 DJ |
2025 | } |
2026 | ||
2027 | /* will be overwritten by expand_prompt, called from rl_message */ | |
2028 | prompt_physical_chars = saved_physical_chars + 1; | |
d60d9f65 SS |
2029 | return pmt; |
2030 | } | |
2031 | ||
2032 | /* Quick redisplay hack when erasing characters at the end of the line. */ | |
2033 | void | |
2034 | _rl_erase_at_end_of_line (l) | |
2035 | int l; | |
2036 | { | |
2037 | register int i; | |
2038 | ||
2039 | _rl_backspace (l); | |
2040 | for (i = 0; i < l; i++) | |
2041 | putc (' ', rl_outstream); | |
2042 | _rl_backspace (l); | |
2043 | for (i = 0; i < l; i++) | |
2044 | visible_line[--_rl_last_c_pos] = '\0'; | |
2045 | rl_display_fixed++; | |
2046 | } | |
2047 | ||
2048 | /* Clear to the end of the line. COUNT is the minimum | |
2049 | number of character spaces to clear, */ | |
2050 | void | |
2051 | _rl_clear_to_eol (count) | |
2052 | int count; | |
2053 | { | |
30083a32 | 2054 | #ifndef __MSDOS__ |
9255ee31 EZ |
2055 | if (_rl_term_clreol) |
2056 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
30083a32 EZ |
2057 | else |
2058 | #endif | |
2059 | if (count) | |
d60d9f65 SS |
2060 | space_to_eol (count); |
2061 | } | |
2062 | ||
2063 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2064 | number of character spaces to clear, */ | |
2065 | static void | |
2066 | space_to_eol (count) | |
2067 | int count; | |
2068 | { | |
2069 | register int i; | |
2070 | ||
2071 | for (i = 0; i < count; i++) | |
2072 | putc (' ', rl_outstream); | |
2073 | ||
2074 | _rl_last_c_pos += count; | |
2075 | } | |
2076 | ||
2077 | void | |
2078 | _rl_clear_screen () | |
2079 | { | |
30083a32 EZ |
2080 | #if defined (__GO32__) |
2081 | ScreenClear (); /* FIXME: only works in text modes */ | |
2082 | ScreenSetCursor (0, 0); /* term_clrpag is "cl" which homes the cursor */ | |
2083 | #else | |
9255ee31 EZ |
2084 | if (_rl_term_clrpag) |
2085 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d60d9f65 | 2086 | else |
9255ee31 | 2087 | rl_crlf (); |
30083a32 | 2088 | #endif |
d60d9f65 SS |
2089 | } |
2090 | ||
9255ee31 | 2091 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
d60d9f65 | 2092 | static void |
9255ee31 | 2093 | insert_some_chars (string, count, col) |
d60d9f65 | 2094 | char *string; |
9255ee31 | 2095 | int count, col; |
d60d9f65 | 2096 | { |
5bdf8622 | 2097 | #if defined (__MSDOS__) || defined (__MINGW32__) |
30083a32 | 2098 | _rl_output_some_chars (string, count); |
5bdf8622 | 2099 | #else |
9255ee31 EZ |
2100 | /* DEBUGGING */ |
2101 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2102 | if (count != col) | |
2103 | fprintf(stderr, "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); | |
2104 | ||
d60d9f65 | 2105 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
9255ee31 | 2106 | if (_rl_term_IC) |
d60d9f65 SS |
2107 | { |
2108 | char *buffer; | |
9255ee31 EZ |
2109 | |
2110 | buffer = tgoto (_rl_term_IC, 0, col); | |
d60d9f65 SS |
2111 | tputs (buffer, 1, _rl_output_character_function); |
2112 | _rl_output_some_chars (string, count); | |
2113 | } | |
2114 | else | |
2115 | { | |
2116 | register int i; | |
2117 | ||
2118 | /* If we have to turn on insert-mode, then do so. */ | |
9255ee31 EZ |
2119 | if (_rl_term_im && *_rl_term_im) |
2120 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
d60d9f65 SS |
2121 | |
2122 | /* If there is a special command for inserting characters, then | |
2123 | use that first to open up the space. */ | |
9255ee31 | 2124 | if (_rl_term_ic && *_rl_term_ic) |
d60d9f65 | 2125 | { |
9255ee31 EZ |
2126 | for (i = col; i--; ) |
2127 | tputs (_rl_term_ic, 1, _rl_output_character_function); | |
d60d9f65 SS |
2128 | } |
2129 | ||
2130 | /* Print the text. */ | |
2131 | _rl_output_some_chars (string, count); | |
2132 | ||
2133 | /* If there is a string to turn off insert mode, we had best use | |
2134 | it now. */ | |
9255ee31 EZ |
2135 | if (_rl_term_ei && *_rl_term_ei) |
2136 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
d60d9f65 | 2137 | } |
5bdf8622 | 2138 | #endif /* __MSDOS__ || __MINGW32__ */ |
d60d9f65 SS |
2139 | } |
2140 | ||
2141 | /* Delete COUNT characters from the display line. */ | |
2142 | static void | |
2143 | delete_chars (count) | |
2144 | int count; | |
2145 | { | |
9255ee31 | 2146 | if (count > _rl_screenwidth) /* XXX */ |
d60d9f65 SS |
2147 | return; |
2148 | ||
5bdf8622 | 2149 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
9255ee31 | 2150 | if (_rl_term_DC && *_rl_term_DC) |
d60d9f65 SS |
2151 | { |
2152 | char *buffer; | |
9255ee31 | 2153 | buffer = tgoto (_rl_term_DC, count, count); |
d60d9f65 SS |
2154 | tputs (buffer, count, _rl_output_character_function); |
2155 | } | |
2156 | else | |
2157 | { | |
9255ee31 | 2158 | if (_rl_term_dc && *_rl_term_dc) |
d60d9f65 | 2159 | while (count--) |
9255ee31 | 2160 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
d60d9f65 | 2161 | } |
430b7832 | 2162 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
d60d9f65 SS |
2163 | } |
2164 | ||
2165 | void | |
2166 | _rl_update_final () | |
2167 | { | |
2168 | int full_lines; | |
2169 | ||
2170 | full_lines = 0; | |
2171 | /* If the cursor is the only thing on an otherwise-blank last line, | |
2172 | compensate so we don't print an extra CRLF. */ | |
2173 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
2174 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) | |
2175 | { | |
2176 | _rl_vis_botlin--; | |
2177 | full_lines = 1; | |
2178 | } | |
2179 | _rl_move_vert (_rl_vis_botlin); | |
2180 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ | |
9255ee31 | 2181 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
d60d9f65 SS |
2182 | { |
2183 | char *last_line; | |
9255ee31 | 2184 | |
1b17e766 | 2185 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
9255ee31 | 2186 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
d60d9f65 | 2187 | _rl_clear_to_eol (0); |
9255ee31 | 2188 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
d60d9f65 SS |
2189 | } |
2190 | _rl_vis_botlin = 0; | |
9255ee31 | 2191 | rl_crlf (); |
d60d9f65 SS |
2192 | fflush (rl_outstream); |
2193 | rl_display_fixed++; | |
2194 | } | |
2195 | ||
2196 | /* Move to the start of the current line. */ | |
2197 | static void | |
2198 | cr () | |
2199 | { | |
9255ee31 | 2200 | if (_rl_term_cr) |
d60d9f65 | 2201 | { |
771578d1 SS |
2202 | #if defined (__MSDOS__) |
2203 | putc ('\r', rl_outstream); | |
2204 | #else | |
9255ee31 | 2205 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1b17e766 | 2206 | #endif |
d60d9f65 SS |
2207 | _rl_last_c_pos = 0; |
2208 | } | |
2209 | } | |
2210 | ||
1b17e766 EZ |
2211 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2212 | terminal escape sequences. Called with the cursor at column 0 of the | |
2213 | line to draw the prompt on. */ | |
2214 | static void | |
2215 | redraw_prompt (t) | |
2216 | char *t; | |
2217 | { | |
5bdf8622 | 2218 | char *oldp; |
1b17e766 | 2219 | |
1b17e766 | 2220 | oldp = rl_display_prompt; |
5bdf8622 | 2221 | rl_save_prompt (); |
1b17e766 EZ |
2222 | |
2223 | rl_display_prompt = t; | |
9255ee31 EZ |
2224 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2225 | &prompt_last_invisible, | |
5bdf8622 DJ |
2226 | &prompt_invis_chars_first_line, |
2227 | &prompt_physical_chars); | |
1b17e766 | 2228 | local_prompt_prefix = (char *)NULL; |
5bdf8622 | 2229 | |
1b17e766 EZ |
2230 | rl_forced_update_display (); |
2231 | ||
2232 | rl_display_prompt = oldp; | |
5bdf8622 | 2233 | rl_restore_prompt(); |
1b17e766 EZ |
2234 | } |
2235 | ||
d60d9f65 SS |
2236 | /* Redisplay the current line after a SIGWINCH is received. */ |
2237 | void | |
2238 | _rl_redisplay_after_sigwinch () | |
2239 | { | |
1b17e766 | 2240 | char *t; |
d60d9f65 SS |
2241 | |
2242 | /* Clear the current line and put the cursor at column 0. Make sure | |
2243 | the right thing happens if we have wrapped to a new screen line. */ | |
9255ee31 | 2244 | if (_rl_term_cr) |
d60d9f65 | 2245 | { |
771578d1 SS |
2246 | #if defined (__MSDOS__) |
2247 | putc ('\r', rl_outstream); | |
2248 | #else | |
9255ee31 | 2249 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1b17e766 | 2250 | #endif |
d60d9f65 | 2251 | _rl_last_c_pos = 0; |
771578d1 | 2252 | #if defined (__MSDOS__) |
9255ee31 | 2253 | space_to_eol (_rl_screenwidth); |
771578d1 SS |
2254 | putc ('\r', rl_outstream); |
2255 | #else | |
9255ee31 EZ |
2256 | if (_rl_term_clreol) |
2257 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d60d9f65 SS |
2258 | else |
2259 | { | |
9255ee31 EZ |
2260 | space_to_eol (_rl_screenwidth); |
2261 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
d60d9f65 | 2262 | } |
771578d1 | 2263 | #endif |
d60d9f65 SS |
2264 | if (_rl_last_v_pos > 0) |
2265 | _rl_move_vert (0); | |
2266 | } | |
2267 | else | |
9255ee31 | 2268 | rl_crlf (); |
d60d9f65 SS |
2269 | |
2270 | /* Redraw only the last line of a multi-line prompt. */ | |
2271 | t = strrchr (rl_display_prompt, '\n'); | |
2272 | if (t) | |
1b17e766 | 2273 | redraw_prompt (++t); |
d60d9f65 SS |
2274 | else |
2275 | rl_forced_update_display (); | |
2276 | } | |
2277 | ||
2278 | void | |
2279 | _rl_clean_up_for_exit () | |
2280 | { | |
2281 | if (readline_echoing_p) | |
2282 | { | |
2283 | _rl_move_vert (_rl_vis_botlin); | |
2284 | _rl_vis_botlin = 0; | |
2285 | fflush (rl_outstream); | |
c862e87b | 2286 | rl_restart_output (1, 0); |
d60d9f65 SS |
2287 | } |
2288 | } | |
c862e87b JM |
2289 | |
2290 | void | |
2291 | _rl_erase_entire_line () | |
2292 | { | |
2293 | cr (); | |
2294 | _rl_clear_to_eol (0); | |
2295 | cr (); | |
2296 | fflush (rl_outstream); | |
2297 | } | |
1b17e766 EZ |
2298 | |
2299 | /* return the `current display line' of the cursor -- the number of lines to | |
2300 | move up to get to the first screen line of the current readline line. */ | |
2301 | int | |
2302 | _rl_current_display_line () | |
2303 | { | |
2304 | int ret, nleft; | |
2305 | ||
2306 | /* Find out whether or not there might be invisible characters in the | |
2307 | editing buffer. */ | |
2308 | if (rl_display_prompt == rl_prompt) | |
9255ee31 | 2309 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
1b17e766 | 2310 | else |
9255ee31 | 2311 | nleft = _rl_last_c_pos - _rl_screenwidth; |
1b17e766 EZ |
2312 | |
2313 | if (nleft > 0) | |
9255ee31 | 2314 | ret = 1 + nleft / _rl_screenwidth; |
1b17e766 EZ |
2315 | else |
2316 | ret = 0; | |
2317 | ||
2318 | return ret; | |
2319 | } | |
9255ee31 EZ |
2320 | |
2321 | #if defined (HANDLE_MULTIBYTE) | |
2322 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2323 | In the case of multibyte characters with stateful encoding, we have to | |
2324 | scan from the beginning of the string to take the state into account. */ | |
2325 | static int | |
2326 | _rl_col_width (str, start, end) | |
288381c0 | 2327 | const char *str; |
9255ee31 EZ |
2328 | int start, end; |
2329 | { | |
2330 | wchar_t wc; | |
2331 | mbstate_t ps = {0}; | |
2332 | int tmp, point, width, max; | |
2333 | ||
2334 | if (end <= start) | |
2335 | return 0; | |
2336 | ||
2337 | point = 0; | |
2338 | max = end; | |
2339 | ||
2340 | while (point < start) | |
2341 | { | |
2342 | tmp = mbrlen (str + point, max, &ps); | |
5bdf8622 | 2343 | if (MB_INVALIDCH ((size_t)tmp)) |
9255ee31 EZ |
2344 | { |
2345 | /* In this case, the bytes are invalid or too short to compose a | |
2346 | multibyte character, so we assume that the first byte represents | |
2347 | a single character. */ | |
2348 | point++; | |
2349 | max--; | |
2350 | ||
2351 | /* Clear the state of the byte sequence, because in this case the | |
2352 | effect of mbstate is undefined. */ | |
2353 | memset (&ps, 0, sizeof (mbstate_t)); | |
2354 | } | |
5bdf8622 DJ |
2355 | else if (MB_NULLWCH (tmp)) |
2356 | break; /* Found '\0' */ | |
9255ee31 EZ |
2357 | else |
2358 | { | |
2359 | point += tmp; | |
2360 | max -= tmp; | |
2361 | } | |
2362 | } | |
2363 | ||
2364 | /* If START is not a byte that starts a character, then POINT will be | |
2365 | greater than START. In this case, assume that (POINT - START) gives | |
2366 | a byte count that is the number of columns of difference. */ | |
2367 | width = point - start; | |
2368 | ||
2369 | while (point < end) | |
2370 | { | |
2371 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
5bdf8622 | 2372 | if (MB_INVALIDCH ((size_t)tmp)) |
9255ee31 EZ |
2373 | { |
2374 | /* In this case, the bytes are invalid or too short to compose a | |
2375 | multibyte character, so we assume that the first byte represents | |
2376 | a single character. */ | |
2377 | point++; | |
2378 | max--; | |
2379 | ||
2380 | /* and assume that the byte occupies a single column. */ | |
2381 | width++; | |
2382 | ||
2383 | /* Clear the state of the byte sequence, because in this case the | |
2384 | effect of mbstate is undefined. */ | |
2385 | memset (&ps, 0, sizeof (mbstate_t)); | |
2386 | } | |
5bdf8622 DJ |
2387 | else if (MB_NULLWCH (tmp)) |
2388 | break; /* Found '\0' */ | |
9255ee31 EZ |
2389 | else |
2390 | { | |
2391 | point += tmp; | |
2392 | max -= tmp; | |
2393 | tmp = wcwidth(wc); | |
2394 | width += (tmp >= 0) ? tmp : 1; | |
2395 | } | |
2396 | } | |
2397 | ||
2398 | width += point - end; | |
2399 | ||
2400 | return width; | |
2401 | } | |
2402 | #endif /* HANDLE_MULTIBYTE */ |