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Commit | Line | Data |
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726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
cc87ba64 | 3 | /* Copyright (C) 1987-2005 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of the GNU Readline Library, a library for | |
6 | reading lines of text with interactive input and history editing. | |
7 | ||
8 | The GNU Readline Library is free software; you can redistribute it | |
9 | and/or modify it under the terms of the GNU General Public License | |
bb70624e | 10 | as published by the Free Software Foundation; either version 2, or |
726f6388 JA |
11 | (at your option) any later version. |
12 | ||
13 | The GNU Readline Library is distributed in the hope that it will be | |
14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | The GNU General Public License is often shipped with GNU software, and | |
19 | is generally kept in a file called COPYING or LICENSE. If you do not | |
20 | have a copy of the license, write to the Free Software Foundation, | |
bb70624e | 21 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 JA |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
ccc6cda3 | 25 | # include <config.h> |
726f6388 JA |
26 | #endif |
27 | ||
726f6388 JA |
28 | #include <sys/types.h> |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
d166f048 JA |
34 | #include "posixstat.h" |
35 | ||
726f6388 JA |
36 | #if defined (HAVE_STDLIB_H) |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
d166f048 JA |
42 | #include <stdio.h> |
43 | ||
726f6388 JA |
44 | /* System-specific feature definitions and include files. */ |
45 | #include "rldefs.h" | |
7117c2d2 | 46 | #include "rlmbutil.h" |
726f6388 | 47 | |
ccc6cda3 JA |
48 | /* Termcap library stuff. */ |
49 | #include "tcap.h" | |
50 | ||
726f6388 JA |
51 | /* Some standard library routines. */ |
52 | #include "readline.h" | |
53 | #include "history.h" | |
54 | ||
bb70624e JA |
55 | #include "rlprivate.h" |
56 | #include "xmalloc.h" | |
57 | ||
726f6388 JA |
58 | #if !defined (strchr) && !defined (__STDC__) |
59 | extern char *strchr (), *strrchr (); | |
60 | #endif /* !strchr && !__STDC__ */ | |
61 | ||
bb70624e | 62 | #if defined (HACK_TERMCAP_MOTION) |
28ef6c31 | 63 | extern char *_rl_term_forward_char; |
cce855bc | 64 | #endif |
726f6388 | 65 | |
f73dda09 JA |
66 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
67 | static void space_to_eol PARAMS((int)); | |
68 | static void delete_chars PARAMS((int)); | |
7117c2d2 | 69 | static void insert_some_chars PARAMS((char *, int, int)); |
f73dda09 | 70 | static void cr PARAMS((void)); |
ccc6cda3 | 71 | |
7117c2d2 | 72 | #if defined (HANDLE_MULTIBYTE) |
d3a24ed2 | 73 | static int _rl_col_width PARAMS((const char *, int, int)); |
7117c2d2 JA |
74 | static int *_rl_wrapped_line; |
75 | #else | |
76 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
77 | #endif | |
78 | ||
ccc6cda3 | 79 | static int *inv_lbreaks, *vis_lbreaks; |
bb70624e | 80 | static int inv_lbsize, vis_lbsize; |
726f6388 JA |
81 | |
82 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
83 | by backing up or outputting a carriage return and moving forward. */ | |
84 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
85 | ||
86 | /* **************************************************************** */ | |
87 | /* */ | |
88 | /* Display stuff */ | |
89 | /* */ | |
90 | /* **************************************************************** */ | |
91 | ||
92 | /* This is the stuff that is hard for me. I never seem to write good | |
93 | display routines in C. Let's see how I do this time. */ | |
94 | ||
95 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
96 | the problems of input lines longer than the screen width. | |
97 | ||
98 | update_line and the code that calls it makes a multiple line, | |
99 | automatically wrapping line update. Careful attention needs | |
100 | to be paid to the vertical position variables. */ | |
101 | ||
102 | /* Keep two buffers; one which reflects the current contents of the | |
103 | screen, and the other to draw what we think the new contents should | |
104 | be. Then compare the buffers, and make whatever changes to the | |
105 | screen itself that we should. Finally, make the buffer that we | |
106 | just drew into be the one which reflects the current contents of the | |
107 | screen, and place the cursor where it belongs. | |
108 | ||
109 | Commands that want to can fix the display themselves, and then let | |
110 | this function know that the display has been fixed by setting the | |
111 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
112 | ||
ccc6cda3 | 113 | /* Application-specific redisplay function. */ |
28ef6c31 | 114 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 115 | |
726f6388 JA |
116 | /* Global variables declared here. */ |
117 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
118 | int rl_display_fixed = 0; | |
119 | ||
ccc6cda3 JA |
120 | int _rl_suppress_redisplay = 0; |
121 | ||
726f6388 JA |
122 | /* The stuff that gets printed out before the actual text of the line. |
123 | This is usually pointing to rl_prompt. */ | |
124 | char *rl_display_prompt = (char *)NULL; | |
125 | ||
126 | /* Pseudo-global variables declared here. */ | |
177d51f7 | 127 | |
726f6388 | 128 | /* The visible cursor position. If you print some text, adjust this. */ |
177d51f7 CR |
129 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
130 | supporting multibyte characters, and an absolute cursor position when | |
131 | in such a locale. This is an artifact of the donated multibyte support. | |
132 | Care must be taken when modifying its value. */ | |
726f6388 JA |
133 | int _rl_last_c_pos = 0; |
134 | int _rl_last_v_pos = 0; | |
135 | ||
136 | /* Number of lines currently on screen minus 1. */ | |
137 | int _rl_vis_botlin = 0; | |
138 | ||
139 | /* Variables used only in this file. */ | |
140 | /* The last left edge of text that was displayed. This is used when | |
141 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 142 | static int last_lmargin; |
726f6388 JA |
143 | |
144 | /* The line display buffers. One is the line currently displayed on | |
145 | the screen. The other is the line about to be displayed. */ | |
146 | static char *visible_line = (char *)NULL; | |
147 | static char *invisible_line = (char *)NULL; | |
148 | ||
149 | /* A buffer for `modeline' messages. */ | |
150 | static char msg_buf[128]; | |
151 | ||
152 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 153 | static int forced_display; |
726f6388 JA |
154 | |
155 | /* Default and initial buffer size. Can grow. */ | |
156 | static int line_size = 1024; | |
157 | ||
28ef6c31 JA |
158 | /* Variables to keep track of the expanded prompt string, which may |
159 | include invisible characters. */ | |
160 | ||
726f6388 | 161 | static char *local_prompt, *local_prompt_prefix; |
28ef6c31 | 162 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
163 | |
164 | /* The number of invisible characters in the line currently being | |
165 | displayed on the screen. */ | |
ccc6cda3 JA |
166 | static int visible_wrap_offset; |
167 | ||
28ef6c31 JA |
168 | /* The number of invisible characters in the prompt string. Static so it |
169 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
170 | static int wrap_offset; |
171 | ||
28ef6c31 JA |
172 | /* The index of the last invisible character in the prompt string. */ |
173 | static int prompt_last_invisible; | |
726f6388 JA |
174 | |
175 | /* The length (buffer offset) of the first line of the last (possibly | |
176 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 177 | static int visible_first_line_len; |
726f6388 | 178 | |
28ef6c31 JA |
179 | /* Number of invisible characters on the first physical line of the prompt. |
180 | Only valid when the number of physical characters in the prompt exceeds | |
181 | (or is equal to) _rl_screenwidth. */ | |
182 | static int prompt_invis_chars_first_line; | |
183 | ||
184 | static int prompt_last_screen_line; | |
185 | ||
43cdcad8 CR |
186 | static int prompt_physical_chars; |
187 | ||
6e70dbff CR |
188 | /* Variables to save and restore prompt and display information. */ |
189 | ||
190 | /* These are getting numerous enough that it's time to create a struct. */ | |
191 | ||
192 | static char *saved_local_prompt; | |
193 | static char *saved_local_prefix; | |
194 | static int saved_last_invisible; | |
195 | static int saved_visible_length; | |
196 | static int saved_prefix_length; | |
197 | static int saved_invis_chars_first_line; | |
198 | static int saved_physical_chars; | |
199 | ||
726f6388 JA |
200 | /* Expand the prompt string S and return the number of visible |
201 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 202 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
203 | index of the last invisible character in the returned string. NIFLP, |
204 | if non-zero, is a place to store the number of invisible characters in | |
43cdcad8 CR |
205 | the first prompt line. The previous are used as byte counts -- indexes |
206 | into a character buffer. */ | |
726f6388 JA |
207 | |
208 | /* Current implementation: | |
209 | \001 (^A) start non-visible characters | |
210 | \002 (^B) end non-visible characters | |
211 | all characters except \001 and \002 (following a \001) are copied to | |
212 | the returned string; all characters except those between \001 and | |
213 | \002 are assumed to be `visible'. */ | |
214 | ||
215 | static char * | |
43cdcad8 | 216 | expand_prompt (pmt, lp, lip, niflp, vlp) |
726f6388 | 217 | char *pmt; |
43cdcad8 | 218 | int *lp, *lip, *niflp, *vlp; |
726f6388 JA |
219 | { |
220 | char *r, *ret, *p; | |
b954488b | 221 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
726f6388 JA |
222 | |
223 | /* Short-circuit if we can. */ | |
43cdcad8 | 224 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 JA |
225 | { |
226 | r = savestring (pmt); | |
227 | if (lp) | |
228 | *lp = strlen (r); | |
43cdcad8 CR |
229 | if (lip) |
230 | *lip = 0; | |
231 | if (niflp) | |
232 | *niflp = 0; | |
233 | if (vlp) | |
234 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
235 | return r; |
236 | } | |
237 | ||
ccc6cda3 | 238 | l = strlen (pmt); |
f73dda09 | 239 | r = ret = (char *)xmalloc (l + 1); |
28ef6c31 JA |
240 | |
241 | invfl = 0; /* invisible chars in first line of prompt */ | |
b954488b | 242 | invflset = 0; /* we only want to set invfl once */ |
28ef6c31 | 243 | |
43cdcad8 | 244 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
726f6388 JA |
245 | { |
246 | /* This code strips the invisible character string markers | |
247 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
248 | if (*p == RL_PROMPT_START_IGNORE) | |
249 | { | |
250 | ignoring++; | |
251 | continue; | |
252 | } | |
253 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
254 | { | |
255 | ignoring = 0; | |
ccc6cda3 | 256 | last = r - ret - 1; |
726f6388 JA |
257 | continue; |
258 | } | |
259 | else | |
260 | { | |
43cdcad8 CR |
261 | #if defined (HANDLE_MULTIBYTE) |
262 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
263 | { | |
264 | pind = p - pmt; | |
265 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
266 | l = ind - pind; | |
267 | while (l--) | |
268 | *r++ = *p++; | |
269 | if (!ignoring) | |
37c41ab1 CR |
270 | { |
271 | rl += ind - pind; | |
272 | physchars += _rl_col_width (pmt, pind, ind); | |
273 | } | |
43cdcad8 CR |
274 | else |
275 | ninvis += ind - pind; | |
276 | p--; /* compensate for later increment */ | |
277 | } | |
28ef6c31 | 278 | else |
43cdcad8 CR |
279 | #endif |
280 | { | |
281 | *r++ = *p; | |
282 | if (!ignoring) | |
37c41ab1 CR |
283 | { |
284 | rl++; /* visible length byte counter */ | |
285 | physchars++; | |
286 | } | |
43cdcad8 CR |
287 | else |
288 | ninvis++; /* invisible chars byte counter */ | |
289 | } | |
290 | ||
b954488b CR |
291 | if (invflset == 0 && rl >= _rl_screenwidth) |
292 | { | |
293 | invfl = ninvis; | |
294 | invflset = 1; | |
295 | } | |
726f6388 JA |
296 | } |
297 | } | |
298 | ||
28ef6c31 JA |
299 | if (rl < _rl_screenwidth) |
300 | invfl = ninvis; | |
301 | ||
726f6388 JA |
302 | *r = '\0'; |
303 | if (lp) | |
304 | *lp = rl; | |
ccc6cda3 JA |
305 | if (lip) |
306 | *lip = last; | |
28ef6c31 JA |
307 | if (niflp) |
308 | *niflp = invfl; | |
43cdcad8 CR |
309 | if (vlp) |
310 | *vlp = physchars; | |
726f6388 JA |
311 | return ret; |
312 | } | |
313 | ||
bb70624e JA |
314 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
315 | PMT and return the rest of PMT. */ | |
316 | char * | |
317 | _rl_strip_prompt (pmt) | |
318 | char *pmt; | |
319 | { | |
320 | char *ret; | |
321 | ||
43cdcad8 | 322 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
323 | return ret; |
324 | } | |
325 | ||
726f6388 JA |
326 | /* |
327 | * Expand the prompt string into the various display components, if | |
328 | * necessary. | |
329 | * | |
330 | * local_prompt = expanded last line of string in rl_display_prompt | |
331 | * (portion after the final newline) | |
332 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
333 | * expanded via expand_prompt | |
28ef6c31 JA |
334 | * prompt_visible_length = number of visible characters in local_prompt |
335 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
336 | * |
337 | * This function is called once per call to readline(). It may also be | |
338 | * called arbitrarily to expand the primary prompt. | |
339 | * | |
340 | * The return value is the number of visible characters on the last line | |
341 | * of the (possibly multi-line) prompt. | |
342 | */ | |
343 | int | |
344 | rl_expand_prompt (prompt) | |
345 | char *prompt; | |
346 | { | |
347 | char *p, *t; | |
348 | int c; | |
349 | ||
350 | /* Clear out any saved values. */ | |
28ef6c31 JA |
351 | FREE (local_prompt); |
352 | FREE (local_prompt_prefix); | |
353 | ||
726f6388 | 354 | local_prompt = local_prompt_prefix = (char *)0; |
ec2199bd CR |
355 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
356 | prompt_visible_length = prompt_physical_chars = 0; | |
726f6388 | 357 | |
ccc6cda3 | 358 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
359 | return (0); |
360 | ||
361 | p = strrchr (prompt, '\n'); | |
362 | if (!p) | |
363 | { | |
28ef6c31 JA |
364 | /* The prompt is only one logical line, though it might wrap. */ |
365 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
366 | &prompt_last_invisible, | |
43cdcad8 CR |
367 | &prompt_invis_chars_first_line, |
368 | &prompt_physical_chars); | |
726f6388 | 369 | local_prompt_prefix = (char *)0; |
28ef6c31 | 370 | return (prompt_visible_length); |
726f6388 JA |
371 | } |
372 | else | |
373 | { | |
374 | /* The prompt spans multiple lines. */ | |
375 | t = ++p; | |
28ef6c31 JA |
376 | local_prompt = expand_prompt (p, &prompt_visible_length, |
377 | &prompt_last_invisible, | |
43cdcad8 | 378 | (int *)NULL, |
e6e3b444 | 379 | &prompt_physical_chars); |
726f6388 JA |
380 | c = *t; *t = '\0'; |
381 | /* The portion of the prompt string up to and including the | |
382 | final newline is now null-terminated. */ | |
28ef6c31 JA |
383 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
384 | (int *)NULL, | |
43cdcad8 | 385 | &prompt_invis_chars_first_line, |
e6e3b444 | 386 | (int *)NULL); |
726f6388 | 387 | *t = c; |
28ef6c31 | 388 | return (prompt_prefix_length); |
726f6388 JA |
389 | } |
390 | } | |
391 | ||
bb70624e JA |
392 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
393 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
394 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
395 | increased. If the lines have already been allocated, this ensures that | |
396 | they can hold at least MINSIZE characters. */ | |
397 | static void | |
398 | init_line_structures (minsize) | |
399 | int minsize; | |
400 | { | |
401 | register int n; | |
402 | ||
403 | if (invisible_line == 0) /* initialize it */ | |
404 | { | |
405 | if (line_size < minsize) | |
406 | line_size = minsize; | |
f73dda09 JA |
407 | visible_line = (char *)xmalloc (line_size); |
408 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
409 | } |
410 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
411 | { | |
412 | line_size *= 2; | |
413 | if (line_size < minsize) | |
414 | line_size = minsize; | |
f73dda09 JA |
415 | visible_line = (char *)xrealloc (visible_line, line_size); |
416 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
417 | } |
418 | ||
419 | for (n = minsize; n < line_size; n++) | |
420 | { | |
421 | visible_line[n] = 0; | |
422 | invisible_line[n] = 1; | |
423 | } | |
424 | ||
425 | if (vis_lbreaks == 0) | |
426 | { | |
427 | /* should be enough. */ | |
428 | inv_lbsize = vis_lbsize = 256; | |
429 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
430 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
7117c2d2 JA |
431 | #if defined (HANDLE_MULTIBYTE) |
432 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
433 | #endif | |
bb70624e JA |
434 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
435 | } | |
436 | } | |
437 | ||
726f6388 JA |
438 | /* Basic redisplay algorithm. */ |
439 | void | |
440 | rl_redisplay () | |
441 | { | |
ccc6cda3 JA |
442 | register int in, out, c, linenum, cursor_linenum; |
443 | register char *line; | |
444 | int c_pos, inv_botlin, lb_botlin, lb_linenum; | |
37c41ab1 | 445 | int newlines, lpos, temp, modmark, n0, num; |
726f6388 | 446 | char *prompt_this_line; |
7117c2d2 JA |
447 | #if defined (HANDLE_MULTIBYTE) |
448 | wchar_t wc; | |
449 | size_t wc_bytes; | |
450 | int wc_width; | |
451 | mbstate_t ps; | |
452 | int _rl_wrapped_multicolumn = 0; | |
453 | #endif | |
726f6388 JA |
454 | |
455 | if (!readline_echoing_p) | |
456 | return; | |
457 | ||
458 | if (!rl_display_prompt) | |
459 | rl_display_prompt = ""; | |
460 | ||
ccc6cda3 | 461 | if (invisible_line == 0) |
726f6388 | 462 | { |
bb70624e | 463 | init_line_structures (0); |
726f6388 JA |
464 | rl_on_new_line (); |
465 | } | |
466 | ||
467 | /* Draw the line into the buffer. */ | |
468 | c_pos = -1; | |
469 | ||
ccc6cda3 JA |
470 | line = invisible_line; |
471 | out = inv_botlin = 0; | |
472 | ||
726f6388 JA |
473 | /* Mark the line as modified or not. We only do this for history |
474 | lines. */ | |
43cdcad8 | 475 | modmark = 0; |
726f6388 JA |
476 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
477 | { | |
478 | line[out++] = '*'; | |
479 | line[out] = '\0'; | |
43cdcad8 | 480 | modmark = 1; |
726f6388 JA |
481 | } |
482 | ||
483 | /* If someone thought that the redisplay was handled, but the currently | |
484 | visible line has a different modification state than the one about | |
485 | to become visible, then correct the caller's misconception. */ | |
486 | if (visible_line[0] != invisible_line[0]) | |
487 | rl_display_fixed = 0; | |
488 | ||
489 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
490 | one passed to readline()), use the values we have already expanded. | |
491 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
492 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 493 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 JA |
494 | { |
495 | int local_len = local_prompt ? strlen (local_prompt) : 0; | |
496 | if (local_prompt_prefix && forced_display) | |
497 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
498 | ||
499 | if (local_len > 0) | |
ccc6cda3 | 500 | { |
b72432fd JA |
501 | temp = local_len + out + 2; |
502 | if (temp >= line_size) | |
503 | { | |
504 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
505 | visible_line = (char *)xrealloc (visible_line, line_size); |
506 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 507 | } |
ccc6cda3 JA |
508 | strncpy (line + out, local_prompt, local_len); |
509 | out += local_len; | |
510 | } | |
726f6388 | 511 | line[out] = '\0'; |
28ef6c31 | 512 | wrap_offset = local_len - prompt_visible_length; |
726f6388 JA |
513 | } |
514 | else | |
515 | { | |
516 | int pmtlen; | |
517 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
518 | if (!prompt_this_line) | |
519 | prompt_this_line = rl_display_prompt; | |
520 | else | |
521 | { | |
522 | prompt_this_line++; | |
bb70624e | 523 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 524 | if (forced_display) |
ccc6cda3 | 525 | { |
bb70624e | 526 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
527 | /* Make sure we are at column zero even after a newline, |
528 | regardless of the state of terminal output processing. */ | |
bb70624e | 529 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
530 | cr (); |
531 | } | |
726f6388 JA |
532 | } |
533 | ||
762a763b | 534 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
535 | temp = pmtlen + out + 2; |
536 | if (temp >= line_size) | |
537 | { | |
538 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
539 | visible_line = (char *)xrealloc (visible_line, line_size); |
540 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 541 | } |
726f6388 JA |
542 | strncpy (line + out, prompt_this_line, pmtlen); |
543 | out += pmtlen; | |
544 | line[out] = '\0'; | |
28ef6c31 | 545 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
546 | } |
547 | ||
bb70624e JA |
548 | #define CHECK_INV_LBREAKS() \ |
549 | do { \ | |
550 | if (newlines >= (inv_lbsize - 2)) \ | |
551 | { \ | |
552 | inv_lbsize *= 2; \ | |
553 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
554 | } \ | |
555 | } while (0) | |
7117c2d2 JA |
556 | |
557 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
558 | #define CHECK_LPOS() \ |
559 | do { \ | |
b72432fd | 560 | lpos++; \ |
28ef6c31 | 561 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 562 | { \ |
bb70624e JA |
563 | if (newlines >= (inv_lbsize - 2)) \ |
564 | { \ | |
565 | inv_lbsize *= 2; \ | |
566 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
7117c2d2 | 567 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
bb70624e | 568 | } \ |
b72432fd | 569 | inv_lbreaks[++newlines] = out; \ |
7117c2d2 | 570 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
b72432fd JA |
571 | lpos = 0; \ |
572 | } \ | |
ccc6cda3 | 573 | } while (0) |
7117c2d2 JA |
574 | #else |
575 | #define CHECK_LPOS() \ | |
576 | do { \ | |
577 | lpos++; \ | |
578 | if (lpos >= _rl_screenwidth) \ | |
579 | { \ | |
580 | if (newlines >= (inv_lbsize - 2)) \ | |
581 | { \ | |
582 | inv_lbsize *= 2; \ | |
583 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
584 | } \ | |
585 | inv_lbreaks[++newlines] = out; \ | |
586 | lpos = 0; \ | |
587 | } \ | |
588 | } while (0) | |
589 | #endif | |
ccc6cda3 JA |
590 | |
591 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
592 | inv_lbreaks[newlines = 0] = 0; | |
43cdcad8 | 593 | #if 0 |
d166f048 | 594 | lpos = out - wrap_offset; |
43cdcad8 CR |
595 | #else |
596 | lpos = prompt_physical_chars + modmark; | |
597 | #endif | |
598 | ||
7117c2d2 JA |
599 | #if defined (HANDLE_MULTIBYTE) |
600 | memset (_rl_wrapped_line, 0, vis_lbsize); | |
37c41ab1 | 601 | num = 0; |
7117c2d2 | 602 | #endif |
d166f048 | 603 | |
28ef6c31 JA |
604 | /* prompt_invis_chars_first_line is the number of invisible characters in |
605 | the first physical line of the prompt. | |
606 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
607 | chars on the second line. */ | |
608 | ||
609 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 610 | contents of the command line? */ |
28ef6c31 | 611 | while (lpos >= _rl_screenwidth) |
d166f048 | 612 | { |
28ef6c31 JA |
613 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
614 | invisible characters that is longer than the screen width. The | |
615 | prompt_invis_chars_first_line variable could be made into an array | |
616 | saying how many invisible characters there are per line, but that's | |
617 | probably too much work for the benefit gained. How many people have | |
545f34cf CR |
618 | prompts that exceed two physical lines? |
619 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
37c41ab1 CR |
620 | #if defined (HANDLE_MULTIBYTE) |
621 | n0 = num; | |
622 | temp = local_prompt ? strlen (local_prompt) : 0; | |
623 | while (num < temp) | |
624 | { | |
625 | if (_rl_col_width (local_prompt, n0, num) > _rl_screenwidth) | |
626 | { | |
627 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
628 | break; | |
629 | } | |
630 | num++; | |
631 | } | |
632 | temp = num + | |
633 | #else | |
28ef6c31 | 634 | temp = ((newlines + 1) * _rl_screenwidth) + |
37c41ab1 | 635 | #endif /* !HANDLE_MULTIBYTE */ |
545f34cf CR |
636 | ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line |
637 | : ((newlines == 1) ? wrap_offset : 0)) | |
638 | : ((newlines == 0) ? wrap_offset :0)); | |
639 | ||
d166f048 | 640 | inv_lbreaks[++newlines] = temp; |
37c41ab1 CR |
641 | #if defined (HANDLE_MULTIBYTE) |
642 | lpos -= _rl_col_width (local_prompt, n0, num); | |
643 | #else | |
28ef6c31 | 644 | lpos -= _rl_screenwidth; |
37c41ab1 | 645 | #endif |
d166f048 | 646 | } |
ccc6cda3 | 647 | |
28ef6c31 JA |
648 | prompt_last_screen_line = newlines; |
649 | ||
650 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
651 | track of where the cursor is (c_pos), the number of the line containing | |
652 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). | |
653 | It maintains an array of line breaks for display (inv_lbreaks). | |
654 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 655 | lb_linenum = 0; |
7117c2d2 JA |
656 | #if defined (HANDLE_MULTIBYTE) |
657 | in = 0; | |
658 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
659 | { | |
660 | memset (&ps, 0, sizeof (mbstate_t)); | |
661 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
662 | } | |
663 | else | |
664 | wc_bytes = 1; | |
665 | while (in < rl_end) | |
666 | #else | |
d166f048 | 667 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 668 | #endif |
726f6388 JA |
669 | { |
670 | c = (unsigned char)rl_line_buffer[in]; | |
671 | ||
7117c2d2 JA |
672 | #if defined (HANDLE_MULTIBYTE) |
673 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
674 | { | |
d3a24ed2 | 675 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
676 | { |
677 | /* Byte sequence is invalid or shortened. Assume that the | |
678 | first byte represents a character. */ | |
679 | wc_bytes = 1; | |
680 | /* Assume that a character occupies a single column. */ | |
681 | wc_width = 1; | |
682 | memset (&ps, 0, sizeof (mbstate_t)); | |
683 | } | |
d3a24ed2 | 684 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
685 | break; /* Found '\0' */ |
686 | else | |
687 | { | |
688 | temp = wcwidth (wc); | |
d3a24ed2 | 689 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
690 | } |
691 | } | |
692 | #endif | |
693 | ||
726f6388 JA |
694 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
695 | { | |
696 | line_size *= 2; | |
f73dda09 JA |
697 | visible_line = (char *)xrealloc (visible_line, line_size); |
698 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
699 | line = invisible_line; |
700 | } | |
701 | ||
702 | if (in == rl_point) | |
ccc6cda3 JA |
703 | { |
704 | c_pos = out; | |
705 | lb_linenum = newlines; | |
706 | } | |
726f6388 | 707 | |
7117c2d2 JA |
708 | #if defined (HANDLE_MULTIBYTE) |
709 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
710 | #else | |
726f6388 | 711 | if (META_CHAR (c)) |
7117c2d2 | 712 | #endif |
726f6388 JA |
713 | { |
714 | if (_rl_output_meta_chars == 0) | |
715 | { | |
716 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 717 | |
28ef6c31 | 718 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 719 | { |
28ef6c31 | 720 | temp = _rl_screenwidth - lpos; |
bb70624e | 721 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
722 | inv_lbreaks[++newlines] = out + temp; |
723 | lpos = 4 - temp; | |
724 | } | |
725 | else | |
726 | lpos += 4; | |
727 | ||
726f6388 JA |
728 | out += 4; |
729 | } | |
730 | else | |
ccc6cda3 JA |
731 | { |
732 | line[out++] = c; | |
733 | CHECK_LPOS(); | |
734 | } | |
726f6388 JA |
735 | } |
736 | #if defined (DISPLAY_TABS) | |
737 | else if (c == '\t') | |
738 | { | |
28ef6c31 | 739 | register int newout; |
b72432fd JA |
740 | |
741 | #if 0 | |
ccc6cda3 | 742 | newout = (out | (int)7) + 1; |
b72432fd JA |
743 | #else |
744 | newout = out + 8 - lpos % 8; | |
745 | #endif | |
ccc6cda3 | 746 | temp = newout - out; |
28ef6c31 | 747 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
748 | { |
749 | register int temp2; | |
28ef6c31 | 750 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 751 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
752 | inv_lbreaks[++newlines] = out + temp2; |
753 | lpos = temp - temp2; | |
754 | while (out < newout) | |
755 | line[out++] = ' '; | |
756 | } | |
757 | else | |
758 | { | |
759 | while (out < newout) | |
760 | line[out++] = ' '; | |
761 | lpos += temp; | |
762 | } | |
726f6388 JA |
763 | } |
764 | #endif | |
28ef6c31 | 765 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
766 | { |
767 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 768 | CHECK_INV_LBREAKS (); |
b72432fd JA |
769 | inv_lbreaks[++newlines] = out; |
770 | lpos = 0; | |
771 | } | |
ccc6cda3 | 772 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
773 | { |
774 | line[out++] = '^'; | |
ccc6cda3 JA |
775 | CHECK_LPOS(); |
776 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
777 | CHECK_LPOS(); | |
726f6388 | 778 | } |
ccc6cda3 | 779 | else |
726f6388 | 780 | { |
7117c2d2 JA |
781 | #if defined (HANDLE_MULTIBYTE) |
782 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
783 | { | |
784 | register int i; | |
785 | ||
786 | _rl_wrapped_multicolumn = 0; | |
787 | ||
788 | if (_rl_screenwidth < lpos + wc_width) | |
789 | for (i = lpos; i < _rl_screenwidth; i++) | |
790 | { | |
791 | /* The space will be removed in update_line() */ | |
792 | line[out++] = ' '; | |
793 | _rl_wrapped_multicolumn++; | |
794 | CHECK_LPOS(); | |
795 | } | |
796 | if (in == rl_point) | |
797 | { | |
798 | c_pos = out; | |
799 | lb_linenum = newlines; | |
800 | } | |
801 | for (i = in; i < in+wc_bytes; i++) | |
802 | line[out++] = rl_line_buffer[i]; | |
803 | for (i = 0; i < wc_width; i++) | |
804 | CHECK_LPOS(); | |
805 | } | |
806 | else | |
807 | { | |
808 | line[out++] = c; | |
809 | CHECK_LPOS(); | |
810 | } | |
811 | #else | |
ccc6cda3 JA |
812 | line[out++] = c; |
813 | CHECK_LPOS(); | |
7117c2d2 JA |
814 | #endif |
815 | } | |
816 | ||
817 | #if defined (HANDLE_MULTIBYTE) | |
818 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
819 | { | |
820 | in += wc_bytes; | |
821 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
726f6388 | 822 | } |
7117c2d2 JA |
823 | else |
824 | in++; | |
825 | #endif | |
826 | ||
726f6388 JA |
827 | } |
828 | line[out] = '\0'; | |
829 | if (c_pos < 0) | |
ccc6cda3 JA |
830 | { |
831 | c_pos = out; | |
832 | lb_linenum = newlines; | |
833 | } | |
834 | ||
835 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 836 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
837 | inv_lbreaks[newlines+1] = out; |
838 | cursor_linenum = lb_linenum; | |
726f6388 | 839 | |
28ef6c31 JA |
840 | /* C_POS == position in buffer where cursor should be placed. |
841 | CURSOR_LINENUM == line number where the cursor should be placed. */ | |
726f6388 JA |
842 | |
843 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
844 | line buffers are really multiple lines, which would wrap every | |
845 | (screenwidth - 1) characters. Go through each in turn, finding | |
846 | the changed region and updating it. The line order is top to bottom. */ | |
847 | ||
848 | /* If we can move the cursor up and down, then use multiple lines, | |
849 | otherwise, let long lines display in a single terminal line, and | |
850 | horizontally scroll it. */ | |
851 | ||
28ef6c31 | 852 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 853 | { |
177d51f7 | 854 | int nleft, pos, changed_screen_line, tx; |
726f6388 JA |
855 | |
856 | if (!rl_display_fixed || forced_display) | |
857 | { | |
858 | forced_display = 0; | |
859 | ||
860 | /* If we have more than a screenful of material to display, then | |
861 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 862 | not the first. */ |
28ef6c31 | 863 | if (out >= _rl_screenchars) |
7117c2d2 JA |
864 | { |
865 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
866 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
867 | else | |
868 | out = _rl_screenchars - 1; | |
869 | } | |
726f6388 JA |
870 | |
871 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
872 | second and subsequent lines start at inv_lbreaks[N], offset by |
873 | OFFSET (which has already been calculated above). */ | |
726f6388 JA |
874 | |
875 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
ccc6cda3 JA |
876 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
877 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
878 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 879 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 880 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 JA |
881 | |
882 | /* For each line in the buffer, do the updating display. */ | |
883 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
884 | { | |
885 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, | |
ccc6cda3 | 886 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 JA |
887 | |
888 | /* If this is the line with the prompt, we might need to | |
889 | compensate for invisible characters in the new line. Do | |
890 | this only if there is not more than one new line (which | |
891 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
892 | and the new line is shorter than the old. Make sure we are |
893 | at the end of the new line before clearing. */ | |
726f6388 | 894 | if (linenum == 0 && |
ccc6cda3 | 895 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
896 | (wrap_offset > visible_wrap_offset) && |
897 | (_rl_last_c_pos < visible_first_line_len)) | |
898 | { | |
177d51f7 CR |
899 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
900 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
901 | else | |
902 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
726f6388 | 903 | if (nleft) |
d166f048 | 904 | _rl_clear_to_eol (nleft); |
726f6388 JA |
905 | } |
906 | ||
907 | /* Since the new first line is now visible, save its length. */ | |
908 | if (linenum == 0) | |
ccc6cda3 | 909 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
910 | } |
911 | ||
912 | /* We may have deleted some lines. If so, clear the left over | |
913 | blank ones at the bottom out. */ | |
914 | if (_rl_vis_botlin > inv_botlin) | |
915 | { | |
916 | char *tt; | |
917 | for (; linenum <= _rl_vis_botlin; linenum++) | |
918 | { | |
919 | tt = VIS_CHARS (linenum); | |
920 | _rl_move_vert (linenum); | |
921 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 922 | _rl_clear_to_eol |
28ef6c31 | 923 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
924 | } |
925 | } | |
926 | _rl_vis_botlin = inv_botlin; | |
927 | ||
726f6388 JA |
928 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
929 | different screen line during this redisplay. */ | |
930 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
931 | if (changed_screen_line) | |
932 | { | |
933 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 934 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
935 | the physical cursor position on the screen stays the same, |
936 | but the buffer position needs to be adjusted to account | |
937 | for invisible characters. */ | |
177d51f7 | 938 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
b72432fd | 939 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
940 | } |
941 | ||
942 | /* We have to reprint the prompt if it contains invisible | |
943 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
944 | the characters from the current cursor position. But we |
945 | only need to reprint it if the cursor is before the last | |
946 | invisible character in the prompt string. */ | |
28ef6c31 | 947 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 948 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
28ef6c31 | 949 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
726f6388 | 950 | { |
bb70624e JA |
951 | #if defined (__MSDOS__) |
952 | putc ('\r', rl_outstream); | |
953 | #else | |
28ef6c31 JA |
954 | if (_rl_term_cr) |
955 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 956 | #endif |
726f6388 | 957 | _rl_output_some_chars (local_prompt, nleft); |
7117c2d2 | 958 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5e13499c | 959 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft); |
7117c2d2 JA |
960 | else |
961 | _rl_last_c_pos = nleft; | |
726f6388 JA |
962 | } |
963 | ||
964 | /* Where on that line? And where does that line start | |
965 | in the buffer? */ | |
ccc6cda3 | 966 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 JA |
967 | /* nleft == number of characters in the line buffer between the |
968 | start of the line and the cursor position. */ | |
969 | nleft = c_pos - pos; | |
970 | ||
ccc6cda3 | 971 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 972 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 973 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
974 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
975 | { | |
7117c2d2 | 976 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
177d51f7 | 977 | tx = _rl_col_width (&visible_line[pos], 0, nleft); |
7117c2d2 | 978 | else |
177d51f7 | 979 | tx = nleft; |
d11b8b46 CR |
980 | if (_rl_last_c_pos != tx) |
981 | { | |
982 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ | |
983 | _rl_last_c_pos = tx; | |
984 | } | |
726f6388 JA |
985 | } |
986 | ||
7117c2d2 JA |
987 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
988 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
989 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
990 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
991 | } | |
992 | } | |
993 | else /* Do horizontal scrolling. */ | |
994 | { | |
995 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
996 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
997 | ||
998 | /* Always at top line. */ | |
999 | _rl_last_v_pos = 0; | |
1000 | ||
1001 | /* Compute where in the buffer the displayed line should start. This | |
1002 | will be LMARGIN. */ | |
1003 | ||
1004 | /* The number of characters that will be displayed before the cursor. */ | |
1005 | ndisp = c_pos - wrap_offset; | |
28ef6c31 | 1006 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1007 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 1008 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
726f6388 | 1009 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 1010 | t = _rl_screenwidth / 3; |
726f6388 JA |
1011 | |
1012 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 1013 | last_lmargin will be > 0. */ |
726f6388 JA |
1014 | |
1015 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
1016 | width, compute the starting offset so that the cursor is about |
1017 | two-thirds of the way across the screen. */ | |
28ef6c31 | 1018 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 JA |
1019 | { |
1020 | lmargin = c_pos - (2 * t); | |
1021 | if (lmargin < 0) | |
1022 | lmargin = 0; | |
1023 | /* If the left margin would be in the middle of a prompt with | |
1024 | invisible characters, don't display the prompt at all. */ | |
1025 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1026 | lmargin = nleft; | |
1027 | } | |
28ef6c31 | 1028 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1029 | lmargin = 0; |
726f6388 JA |
1030 | else if (phys_c_pos < 1) |
1031 | { | |
1032 | /* If we are moving back towards the beginning of the line and | |
1033 | the last margin is no longer correct, compute a new one. */ | |
1034 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ | |
1035 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1036 | lmargin = nleft; | |
1037 | } | |
1038 | else | |
b72432fd | 1039 | lmargin = last_lmargin; |
726f6388 JA |
1040 | |
1041 | /* If the first character on the screen isn't the first character | |
1042 | in the display line, indicate this with a special character. */ | |
1043 | if (lmargin > 0) | |
1044 | line[lmargin] = '<'; | |
1045 | ||
1046 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1047 | the whole line, indicate that with a special character at the |
1048 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1049 | wrap offset into account. */ | |
28ef6c31 | 1050 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1051 | if (t < out) |
b72432fd | 1052 | line[t - 1] = '>'; |
726f6388 JA |
1053 | |
1054 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
1055 | { | |
1056 | forced_display = 0; | |
1057 | update_line (&visible_line[last_lmargin], | |
1058 | &invisible_line[lmargin], | |
1059 | 0, | |
28ef6c31 JA |
1060 | _rl_screenwidth + visible_wrap_offset, |
1061 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1062 | 0); |
1063 | ||
1064 | /* If the visible new line is shorter than the old, but the number | |
1065 | of invisible characters is greater, and we are at the end of | |
1066 | the new line, we need to clear to eol. */ | |
1067 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1068 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1069 | (_rl_last_c_pos == out) && | |
1070 | t < visible_first_line_len) | |
1071 | { | |
28ef6c31 | 1072 | nleft = _rl_screenwidth - t; |
d166f048 | 1073 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1074 | } |
1075 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1076 | if (visible_first_line_len > _rl_screenwidth) |
1077 | visible_first_line_len = _rl_screenwidth; | |
726f6388 JA |
1078 | |
1079 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); | |
1080 | last_lmargin = lmargin; | |
1081 | } | |
1082 | } | |
1083 | fflush (rl_outstream); | |
1084 | ||
1085 | /* Swap visible and non-visible lines. */ | |
1086 | { | |
28ef6c31 | 1087 | char *vtemp = visible_line; |
bb70624e JA |
1088 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
1089 | ||
726f6388 | 1090 | visible_line = invisible_line; |
28ef6c31 | 1091 | invisible_line = vtemp; |
bb70624e | 1092 | |
ccc6cda3 JA |
1093 | vis_lbreaks = inv_lbreaks; |
1094 | inv_lbreaks = itemp; | |
bb70624e JA |
1095 | |
1096 | vis_lbsize = inv_lbsize; | |
1097 | inv_lbsize = ntemp; | |
1098 | ||
726f6388 JA |
1099 | rl_display_fixed = 0; |
1100 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1101 | are not displaying any invisible characters, so set visible_wrap_offset | |
1102 | to 0. */ | |
1103 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1104 | visible_wrap_offset = 0; | |
1105 | else | |
1106 | visible_wrap_offset = wrap_offset; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | /* PWP: update_line() is based on finding the middle difference of each | |
1111 | line on the screen; vis: | |
1112 | ||
1113 | /old first difference | |
1114 | /beginning of line | /old last same /old EOL | |
1115 | v v v v | |
1116 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1117 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1118 | ^ ^ ^ ^ | |
1119 | \beginning of line | \new last same \new end of line | |
1120 | \new first difference | |
1121 | ||
1122 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1123 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1124 | |
1125 | Could be made even smarter, but this works well enough */ | |
1126 | static void | |
1127 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1128 | register char *old, *new; | |
ccc6cda3 | 1129 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1130 | { |
1131 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
1132 | int temp, lendiff, wsatend, od, nd; | |
ccc6cda3 | 1133 | int current_invis_chars; |
7117c2d2 JA |
1134 | int col_lendiff, col_temp; |
1135 | #if defined (HANDLE_MULTIBYTE) | |
1136 | mbstate_t ps_new, ps_old; | |
1137 | int new_offset, old_offset, tmp; | |
1138 | #endif | |
726f6388 JA |
1139 | |
1140 | /* If we're at the right edge of a terminal that supports xn, we're | |
1141 | ready to wrap around, so do so. This fixes problems with knowing | |
1142 | the exact cursor position and cut-and-paste with certain terminal | |
1143 | emulators. In this calculation, TEMP is the physical screen | |
1144 | position of the cursor. */ | |
177d51f7 CR |
1145 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1146 | temp = _rl_last_c_pos; | |
1147 | else | |
1148 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
28ef6c31 | 1149 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1150 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1151 | { |
7117c2d2 JA |
1152 | #if defined (HANDLE_MULTIBYTE) |
1153 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1154 | { | |
1155 | wchar_t wc; | |
1156 | mbstate_t ps; | |
1157 | int tempwidth, bytes; | |
1158 | size_t ret; | |
1159 | ||
1160 | /* This fixes only double-column characters, but if the wrapped | |
1161 | character comsumes more than three columns, spaces will be | |
1162 | inserted in the string buffer. */ | |
1163 | if (_rl_wrapped_line[current_line] > 0) | |
1164 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); | |
1165 | ||
1166 | memset (&ps, 0, sizeof (mbstate_t)); | |
1167 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
d3a24ed2 | 1168 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1169 | { |
1170 | tempwidth = 1; | |
1171 | ret = 1; | |
1172 | } | |
d3a24ed2 | 1173 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1174 | tempwidth = 0; |
1175 | else | |
1176 | tempwidth = wcwidth (wc); | |
1177 | ||
1178 | if (tempwidth > 0) | |
1179 | { | |
1180 | int count; | |
1181 | bytes = ret; | |
1182 | for (count = 0; count < bytes; count++) | |
1183 | putc (new[count], rl_outstream); | |
1184 | _rl_last_c_pos = tempwidth; | |
1185 | _rl_last_v_pos++; | |
1186 | memset (&ps, 0, sizeof (mbstate_t)); | |
1187 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1188 | if (ret != 0 && bytes != 0) | |
1189 | { | |
d3a24ed2 | 1190 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1191 | memmove (old+bytes, old+1, strlen (old+1)); |
1192 | else | |
1193 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1194 | memcpy (old, new, bytes); | |
1195 | } | |
1196 | } | |
1197 | else | |
1198 | { | |
1199 | putc (' ', rl_outstream); | |
1200 | _rl_last_c_pos = 1; | |
1201 | _rl_last_v_pos++; | |
1202 | if (old[0] && new[0]) | |
1203 | old[0] = new[0]; | |
1204 | } | |
1205 | } | |
726f6388 | 1206 | else |
7117c2d2 JA |
1207 | #endif |
1208 | { | |
1209 | if (new[0]) | |
1210 | putc (new[0], rl_outstream); | |
1211 | else | |
1212 | putc (' ', rl_outstream); | |
1213 | _rl_last_c_pos = 1; /* XXX */ | |
1214 | _rl_last_v_pos++; | |
1215 | if (old[0] && new[0]) | |
1216 | old[0] = new[0]; | |
1217 | } | |
726f6388 | 1218 | } |
7117c2d2 | 1219 | |
726f6388 JA |
1220 | |
1221 | /* Find first difference. */ | |
7117c2d2 JA |
1222 | #if defined (HANDLE_MULTIBYTE) |
1223 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1224 | { | |
5e13499c CR |
1225 | /* See if the old line is a subset of the new line, so that the |
1226 | only change is adding characters. */ | |
1227 | temp = (omax < nmax) ? omax : nmax; | |
1228 | if (memcmp (old, new, temp) == 0) | |
7117c2d2 | 1229 | { |
5e13499c CR |
1230 | ofd = old + temp; |
1231 | nfd = new + temp; | |
d3a24ed2 CR |
1232 | } |
1233 | else | |
5e13499c CR |
1234 | { |
1235 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1236 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1237 | ||
1238 | if (omax == nmax && STREQN (new, old, omax)) | |
d3a24ed2 | 1239 | { |
5e13499c CR |
1240 | ofd = old + omax; |
1241 | nfd = new + nmax; | |
1242 | } | |
1243 | else | |
1244 | { | |
1245 | new_offset = old_offset = 0; | |
1246 | for (ofd = old, nfd = new; | |
1247 | (ofd - old < omax) && *ofd && | |
1248 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1249 | { | |
1250 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1251 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1252 | ofd = old + old_offset; | |
1253 | nfd = new + new_offset; | |
1254 | } | |
d3a24ed2 | 1255 | } |
7117c2d2 JA |
1256 | } |
1257 | } | |
1258 | else | |
1259 | #endif | |
726f6388 JA |
1260 | for (ofd = old, nfd = new; |
1261 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1262 | ofd++, nfd++) | |
1263 | ; | |
1264 | ||
1265 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1266 | of the distance between ne and new and oe and old, respectively, to | |
1267 | move a subtraction out of each loop. */ | |
1268 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1269 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1270 | ||
1271 | /* If no difference, continue to next line. */ | |
1272 | if (ofd == oe && nfd == ne) | |
1273 | return; | |
1274 | ||
1275 | wsatend = 1; /* flag for trailing whitespace */ | |
7117c2d2 JA |
1276 | |
1277 | #if defined (HANDLE_MULTIBYTE) | |
1278 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1279 | { | |
1280 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1281 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1282 | while ((ols > ofd) && (nls > nfd)) | |
1283 | { | |
1284 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1285 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1286 | ||
d3a24ed2 CR |
1287 | #if 0 |
1288 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1289 | _rl_adjust_point (old, ols - old, &ps_old); |
1290 | _rl_adjust_point (new, nls - new, &ps_new); | |
d3a24ed2 | 1291 | #endif |
7117c2d2 JA |
1292 | |
1293 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1294 | break; | |
1295 | ||
1296 | if (*ols == ' ') | |
1297 | wsatend = 0; | |
1298 | ||
1299 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1300 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1301 | } | |
1302 | } | |
1303 | else | |
1304 | { | |
1305 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1306 | ols = oe - 1; /* find last same */ |
1307 | nls = ne - 1; | |
1308 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1309 | { | |
1310 | if (*ols != ' ') | |
1311 | wsatend = 0; | |
1312 | ols--; | |
1313 | nls--; | |
1314 | } | |
7117c2d2 JA |
1315 | #if defined (HANDLE_MULTIBYTE) |
1316 | } | |
1317 | #endif | |
726f6388 JA |
1318 | |
1319 | if (wsatend) | |
1320 | { | |
1321 | ols = oe; | |
1322 | nls = ne; | |
1323 | } | |
7117c2d2 JA |
1324 | #if defined (HANDLE_MULTIBYTE) |
1325 | /* This may not work for stateful encoding, but who cares? To handle | |
1326 | stateful encoding properly, we have to scan each string from the | |
1327 | beginning and compare. */ | |
1328 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1329 | #else | |
726f6388 | 1330 | else if (*ols != *nls) |
7117c2d2 | 1331 | #endif |
726f6388 JA |
1332 | { |
1333 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 JA |
1334 | { |
1335 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1336 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1337 | else | |
1338 | ols++; | |
1339 | } | |
726f6388 | 1340 | if (*nls) |
7117c2d2 JA |
1341 | { |
1342 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1343 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1344 | else | |
1345 | nls++; | |
1346 | } | |
726f6388 JA |
1347 | } |
1348 | ||
ccc6cda3 JA |
1349 | /* count of invisible characters in the current invisible line. */ |
1350 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1351 | if (_rl_last_v_pos != current_line) | |
1352 | { | |
1353 | _rl_move_vert (current_line); | |
177d51f7 | 1354 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
ccc6cda3 JA |
1355 | _rl_last_c_pos += visible_wrap_offset; |
1356 | } | |
726f6388 JA |
1357 | |
1358 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1359 | prompt string, and the prompt string has not changed, and the current |
1360 | cursor position is before the last invisible character in the prompt, | |
1361 | and the index of the character to move to is past the end of the prompt | |
1362 | string, then redraw the entire prompt string. We can only do this | |
1363 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1364 | |
ccc6cda3 JA |
1365 | This is not an efficiency hack -- there is a problem with redrawing |
1366 | portions of the prompt string if they contain terminal escape | |
1367 | sequences (like drawing the `unbold' sequence without a corresponding | |
1368 | `bold') that manifests itself on certain terminals. */ | |
726f6388 JA |
1369 | |
1370 | lendiff = local_prompt ? strlen (local_prompt) : 0; | |
ccc6cda3 | 1371 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 1372 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 JA |
1373 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
1374 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) | |
726f6388 | 1375 | { |
bb70624e JA |
1376 | #if defined (__MSDOS__) |
1377 | putc ('\r', rl_outstream); | |
1378 | #else | |
28ef6c31 | 1379 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1380 | #endif |
726f6388 | 1381 | _rl_output_some_chars (local_prompt, lendiff); |
7117c2d2 JA |
1382 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1383 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff); | |
1384 | else | |
1385 | _rl_last_c_pos = lendiff; | |
726f6388 JA |
1386 | } |
1387 | ||
ccc6cda3 | 1388 | _rl_move_cursor_relative (od, old); |
726f6388 | 1389 | |
7117c2d2 JA |
1390 | /* if (len (new) > len (old)) |
1391 | lendiff == difference in buffer | |
1392 | col_lendiff == difference on screen | |
1393 | When not using multibyte characters, these are equal */ | |
726f6388 | 1394 | lendiff = (nls - nfd) - (ols - ofd); |
7117c2d2 JA |
1395 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1396 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1397 | else | |
1398 | col_lendiff = lendiff; | |
726f6388 | 1399 | |
ccc6cda3 JA |
1400 | /* If we are changing the number of invisible characters in a line, and |
1401 | the spot of first difference is before the end of the invisible chars, | |
1402 | lendiff needs to be adjusted. */ | |
1403 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1404 | current_invis_chars != visible_wrap_offset) | |
7117c2d2 JA |
1405 | { |
1406 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1407 | { | |
1408 | lendiff += visible_wrap_offset - current_invis_chars; | |
1409 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1410 | } | |
1411 | else | |
1412 | { | |
1413 | lendiff += visible_wrap_offset - current_invis_chars; | |
1414 | col_lendiff = lendiff; | |
1415 | } | |
1416 | } | |
ccc6cda3 | 1417 | |
726f6388 JA |
1418 | /* Insert (diff (len (old), len (new)) ch. */ |
1419 | temp = ne - nfd; | |
7117c2d2 JA |
1420 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1421 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1422 | else | |
1423 | col_temp = temp; | |
1424 | ||
1425 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
726f6388 JA |
1426 | { |
1427 | /* Non-zero if we're increasing the number of lines. */ | |
1428 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1429 | /* Sometimes it is cheaper to print the characters rather than | |
1430 | use the terminal's capabilities. If we're growing the number | |
1431 | of lines, make sure we actually cause the new line to wrap | |
1432 | around on auto-wrapping terminals. */ | |
7117c2d2 | 1433 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1434 | { |
28ef6c31 | 1435 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1436 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1437 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 JA |
1438 | invisible characters. We need to just draw them. */ |
1439 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
28ef6c31 | 1440 | lendiff <= prompt_visible_length || !current_invis_chars)) |
726f6388 | 1441 | { |
7117c2d2 JA |
1442 | insert_some_chars (nfd, lendiff, col_lendiff); |
1443 | _rl_last_c_pos += col_lendiff; | |
726f6388 | 1444 | } |
d90269dd | 1445 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
726f6388 JA |
1446 | { |
1447 | /* At the end of a line the characters do not have to | |
1448 | be "inserted". They can just be placed on the screen. */ | |
ccc6cda3 | 1449 | /* However, this screws up the rest of this block, which |
b72432fd | 1450 | assumes you've done the insert because you can. */ |
726f6388 | 1451 | _rl_output_some_chars (nfd, lendiff); |
7117c2d2 | 1452 | _rl_last_c_pos += col_lendiff; |
726f6388 | 1453 | } |
ccc6cda3 JA |
1454 | else |
1455 | { | |
1456 | /* We have horizontal scrolling and we are not inserting at | |
1457 | the end. We have invisible characters in this line. This | |
1458 | is a dumb update. */ | |
1459 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1460 | _rl_last_c_pos += col_temp; |
ccc6cda3 JA |
1461 | return; |
1462 | } | |
726f6388 JA |
1463 | /* Copy (new) chars to screen from first diff to last match. */ |
1464 | temp = nls - nfd; | |
1465 | if ((temp - lendiff) > 0) | |
1466 | { | |
1467 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
5e13499c CR |
1468 | #if 1 |
1469 | /* XXX -- this bears closer inspection. Fixes a redisplay bug | |
1470 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1471 | multibyte characters and prompt strings with invisible | |
1472 | characters, but was previously disabled. */ | |
7117c2d2 | 1473 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); |
d3a24ed2 CR |
1474 | #else |
1475 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff); | |
7117c2d2 | 1476 | #endif |
726f6388 JA |
1477 | } |
1478 | } | |
1479 | else | |
1480 | { | |
1481 | /* cannot insert chars, write to EOL */ | |
1482 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1483 | _rl_last_c_pos += col_temp; |
726f6388 JA |
1484 | } |
1485 | } | |
1486 | else /* Delete characters from line. */ | |
1487 | { | |
1488 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1489 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1490 | { |
1491 | /* If all we're doing is erasing the invisible characters in the | |
1492 | prompt string, don't bother. It screws up the assumptions | |
1493 | about what's on the screen. */ | |
1494 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1495 | -lendiff == visible_wrap_offset) | |
7117c2d2 | 1496 | col_lendiff = 0; |
726f6388 | 1497 | |
7117c2d2 JA |
1498 | if (col_lendiff) |
1499 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 JA |
1500 | |
1501 | /* Copy (new) chars to screen from first diff to last match */ | |
1502 | temp = nls - nfd; | |
1503 | if (temp > 0) | |
1504 | { | |
1505 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1506 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp);; |
726f6388 JA |
1507 | } |
1508 | } | |
1509 | /* Otherwise, print over the existing material. */ | |
1510 | else | |
1511 | { | |
1512 | if (temp > 0) | |
1513 | { | |
1514 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1515 | _rl_last_c_pos += col_temp; |
726f6388 JA |
1516 | } |
1517 | lendiff = (oe - old) - (ne - new); | |
7117c2d2 JA |
1518 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1519 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1520 | else | |
1521 | col_lendiff = lendiff; | |
1522 | ||
1523 | if (col_lendiff) | |
b72432fd JA |
1524 | { |
1525 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 1526 | space_to_eol (col_lendiff); |
b72432fd | 1527 | else |
7117c2d2 | 1528 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 1529 | } |
726f6388 JA |
1530 | } |
1531 | } | |
1532 | } | |
1533 | ||
1534 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1535 | int |
726f6388 JA |
1536 | rl_on_new_line () |
1537 | { | |
1538 | if (visible_line) | |
1539 | visible_line[0] = '\0'; | |
1540 | ||
1541 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1542 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1543 | if (vis_lbreaks) |
1544 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1545 | visible_wrap_offset = 0; | |
726f6388 JA |
1546 | return 0; |
1547 | } | |
1548 | ||
bb70624e JA |
1549 | /* Tell the update routines that we have moved onto a new line with the |
1550 | prompt already displayed. Code originally from the version of readline | |
61deeb13 CR |
1551 | distributed with CLISP. rl_expand_prompt must have already been called |
1552 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
1553 | int |
1554 | rl_on_new_line_with_prompt () | |
1555 | { | |
1556 | int prompt_size, i, l, real_screenwidth, newlines; | |
61deeb13 | 1557 | char *prompt_last_line, *lprompt; |
bb70624e JA |
1558 | |
1559 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1560 | the already-displayed prompt. */ | |
1561 | prompt_size = strlen (rl_prompt) + 1; | |
1562 | init_line_structures (prompt_size); | |
1563 | ||
1564 | /* Make sure the line structures hold the already-displayed prompt for | |
1565 | redisplay. */ | |
61deeb13 CR |
1566 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1567 | strcpy (visible_line, lprompt); | |
1568 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
1569 | |
1570 | /* If the prompt contains newlines, take the last tail. */ | |
1571 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1572 | if (!prompt_last_line) | |
1573 | prompt_last_line = rl_prompt; | |
1574 | ||
1575 | l = strlen (prompt_last_line); | |
7117c2d2 JA |
1576 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1577 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); | |
1578 | else | |
1579 | _rl_last_c_pos = l; | |
bb70624e JA |
1580 | |
1581 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1582 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1583 | one less, see terminal.c. */ | |
28ef6c31 | 1584 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1585 | _rl_last_v_pos = l / real_screenwidth; |
1586 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1587 | whether the cursor is at the end of the last line, or already at the | |
1588 | beginning of the next line. Output a newline just to be safe. */ | |
1589 | if (l > 0 && (l % real_screenwidth) == 0) | |
1590 | _rl_output_some_chars ("\n", 1); | |
1591 | last_lmargin = 0; | |
1592 | ||
1593 | newlines = 0; i = 0; | |
1594 | while (i <= l) | |
1595 | { | |
1596 | _rl_vis_botlin = newlines; | |
1597 | vis_lbreaks[newlines++] = i; | |
1598 | i += real_screenwidth; | |
1599 | } | |
1600 | vis_lbreaks[newlines] = l; | |
1601 | visible_wrap_offset = 0; | |
1602 | ||
61deeb13 CR |
1603 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1604 | ||
bb70624e JA |
1605 | return 0; |
1606 | } | |
1607 | ||
726f6388 | 1608 | /* Actually update the display, period. */ |
ccc6cda3 | 1609 | int |
726f6388 JA |
1610 | rl_forced_update_display () |
1611 | { | |
1612 | if (visible_line) | |
1613 | { | |
1614 | register char *temp = visible_line; | |
1615 | ||
ccc6cda3 | 1616 | while (*temp) |
b72432fd | 1617 | *temp++ = '\0'; |
726f6388 JA |
1618 | } |
1619 | rl_on_new_line (); | |
1620 | forced_display++; | |
ccc6cda3 | 1621 | (*rl_redisplay_function) (); |
726f6388 JA |
1622 | return 0; |
1623 | } | |
1624 | ||
1625 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
1626 | DATA is the contents of the screen line of interest; i.e., where | |
1627 | the movement is being done. */ | |
1628 | void | |
1629 | _rl_move_cursor_relative (new, data) | |
1630 | int new; | |
28ef6c31 | 1631 | const char *data; |
726f6388 JA |
1632 | { |
1633 | register int i; | |
1634 | ||
1635 | /* If we don't have to do anything, then return. */ | |
7117c2d2 JA |
1636 | #if defined (HANDLE_MULTIBYTE) |
1637 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1638 | a multibyte string, but _rl_last_c_pos is the display position. In | |
d3a24ed2 CR |
1639 | this case, NEW's display position is not obvious and must be |
1640 | calculated. */ | |
1641 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
1642 | { | |
1643 | if (_rl_last_c_pos == new) | |
1644 | return; | |
1645 | } | |
1646 | else if (_rl_last_c_pos == _rl_col_width (data, 0, new)) | |
1647 | return; | |
7117c2d2 | 1648 | #else |
726f6388 | 1649 | if (_rl_last_c_pos == new) return; |
7117c2d2 | 1650 | #endif |
726f6388 JA |
1651 | |
1652 | /* It may be faster to output a CR, and then move forwards instead | |
1653 | of moving backwards. */ | |
1654 | /* i == current physical cursor position. */ | |
1655 | i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
ccc6cda3 | 1656 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || |
28ef6c31 | 1657 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
1658 | { |
1659 | #if defined (__MSDOS__) | |
1660 | putc ('\r', rl_outstream); | |
1661 | #else | |
28ef6c31 | 1662 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 JA |
1663 | #endif /* !__MSDOS__ */ |
1664 | _rl_last_c_pos = 0; | |
1665 | } | |
1666 | ||
1667 | if (_rl_last_c_pos < new) | |
1668 | { | |
1669 | /* Move the cursor forward. We do it by printing the command | |
1670 | to move the cursor forward if there is one, else print that | |
1671 | portion of the output buffer again. Which is cheaper? */ | |
1672 | ||
1673 | /* The above comment is left here for posterity. It is faster | |
1674 | to print one character (non-control) than to print a control | |
1675 | sequence telling the terminal to move forward one character. | |
1676 | That kind of control is for people who don't know what the | |
1677 | data is underneath the cursor. */ | |
1678 | #if defined (HACK_TERMCAP_MOTION) | |
28ef6c31 | 1679 | if (_rl_term_forward_char) |
7117c2d2 JA |
1680 | { |
1681 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1682 | { | |
1683 | int width; | |
1684 | width = _rl_col_width (data, _rl_last_c_pos, new); | |
1685 | for (i = 0; i < width; i++) | |
1686 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1687 | } | |
1688 | else | |
1689 | { | |
1690 | for (i = _rl_last_c_pos; i < new; i++) | |
1691 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1692 | } | |
1693 | } | |
1694 | else if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1695 | { | |
1696 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1697 | for (i = 0; i < new; i++) | |
1698 | putc (data[i], rl_outstream); | |
1699 | } | |
1700 | else | |
726f6388 | 1701 | for (i = _rl_last_c_pos; i < new; i++) |
7117c2d2 JA |
1702 | putc (data[i], rl_outstream); |
1703 | ||
1704 | #else /* !HACK_TERMCAP_MOTION */ | |
1705 | ||
1706 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1707 | { | |
1708 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1709 | for (i = 0; i < new; i++) | |
1710 | putc (data[i], rl_outstream); | |
1711 | } | |
726f6388 JA |
1712 | else |
1713 | for (i = _rl_last_c_pos; i < new; i++) | |
1714 | putc (data[i], rl_outstream); | |
7117c2d2 JA |
1715 | |
1716 | #endif /* !HACK_TERMCAP_MOTION */ | |
1717 | ||
726f6388 | 1718 | } |
7117c2d2 JA |
1719 | #if defined (HANDLE_MULTIBYTE) |
1720 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1721 | The byte length of the string is probably bigger than the column width | |
1722 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1723 | display point is less than _rl_last_c_pos. */ | |
1724 | else if (_rl_last_c_pos >= new) | |
1725 | #else | |
b72432fd | 1726 | else if (_rl_last_c_pos > new) |
7117c2d2 JA |
1727 | #endif |
1728 | { | |
1729 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
d3a24ed2 | 1730 | _rl_backspace (_rl_last_c_pos - _rl_col_width (data, 0, new)); |
7117c2d2 JA |
1731 | else |
1732 | _rl_backspace (_rl_last_c_pos - new); | |
1733 | } | |
1734 | ||
1735 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1736 | _rl_last_c_pos = _rl_col_width (data, 0, new); | |
1737 | else | |
1738 | _rl_last_c_pos = new; | |
726f6388 JA |
1739 | } |
1740 | ||
1741 | /* PWP: move the cursor up or down. */ | |
1742 | void | |
1743 | _rl_move_vert (to) | |
1744 | int to; | |
1745 | { | |
1746 | register int delta, i; | |
1747 | ||
28ef6c31 | 1748 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
1749 | return; |
1750 | ||
726f6388 JA |
1751 | if ((delta = to - _rl_last_v_pos) > 0) |
1752 | { | |
1753 | for (i = 0; i < delta; i++) | |
1754 | putc ('\n', rl_outstream); | |
bb70624e JA |
1755 | #if defined (__MSDOS__) |
1756 | putc ('\r', rl_outstream); | |
1757 | #else | |
28ef6c31 | 1758 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1759 | #endif |
726f6388 JA |
1760 | _rl_last_c_pos = 0; |
1761 | } | |
1762 | else | |
1763 | { /* delta < 0 */ | |
28ef6c31 | 1764 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 1765 | for (i = 0; i < -delta; i++) |
28ef6c31 | 1766 | tputs (_rl_term_up, 1, _rl_output_character_function); |
726f6388 | 1767 | } |
bb70624e | 1768 | |
726f6388 JA |
1769 | _rl_last_v_pos = to; /* Now TO is here */ |
1770 | } | |
1771 | ||
1772 | /* Physically print C on rl_outstream. This is for functions which know | |
1773 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 1774 | int |
726f6388 JA |
1775 | rl_show_char (c) |
1776 | int c; | |
1777 | { | |
1778 | int n = 1; | |
1779 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1780 | { | |
1781 | fprintf (rl_outstream, "M-"); | |
1782 | n += 2; | |
1783 | c = UNMETA (c); | |
1784 | } | |
1785 | ||
1786 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 1787 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 1788 | #else |
ccc6cda3 | 1789 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
1790 | #endif /* !DISPLAY_TABS */ |
1791 | { | |
1792 | fprintf (rl_outstream, "C-"); | |
1793 | n += 2; | |
ccc6cda3 | 1794 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
1795 | } |
1796 | ||
1797 | putc (c, rl_outstream); | |
1798 | fflush (rl_outstream); | |
1799 | return n; | |
1800 | } | |
1801 | ||
1802 | int | |
1803 | rl_character_len (c, pos) | |
1804 | register int c, pos; | |
1805 | { | |
1806 | unsigned char uc; | |
1807 | ||
1808 | uc = (unsigned char)c; | |
1809 | ||
1810 | if (META_CHAR (uc)) | |
1811 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1812 | ||
1813 | if (uc == '\t') | |
1814 | { | |
1815 | #if defined (DISPLAY_TABS) | |
1816 | return (((pos | 7) + 1) - pos); | |
1817 | #else | |
1818 | return (2); | |
1819 | #endif /* !DISPLAY_TABS */ | |
1820 | } | |
1821 | ||
ccc6cda3 JA |
1822 | if (CTRL_CHAR (c) || c == RUBOUT) |
1823 | return (2); | |
1824 | ||
f73dda09 | 1825 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 | 1826 | } |
726f6388 JA |
1827 | /* How to print things in the "echo-area". The prompt is treated as a |
1828 | mini-modeline. */ | |
6e70dbff | 1829 | static int msg_saved_prompt = 0; |
726f6388 | 1830 | |
ccc6cda3 JA |
1831 | #if defined (USE_VARARGS) |
1832 | int | |
1833 | #if defined (PREFER_STDARG) | |
1834 | rl_message (const char *format, ...) | |
1835 | #else | |
726f6388 JA |
1836 | rl_message (va_alist) |
1837 | va_dcl | |
ccc6cda3 | 1838 | #endif |
726f6388 | 1839 | { |
726f6388 | 1840 | va_list args; |
ccc6cda3 JA |
1841 | #if defined (PREFER_VARARGS) |
1842 | char *format; | |
1843 | #endif | |
726f6388 | 1844 | |
ccc6cda3 JA |
1845 | #if defined (PREFER_STDARG) |
1846 | va_start (args, format); | |
1847 | #else | |
726f6388 JA |
1848 | va_start (args); |
1849 | format = va_arg (args, char *); | |
ccc6cda3 JA |
1850 | #endif |
1851 | ||
f73dda09 JA |
1852 | #if defined (HAVE_VSNPRINTF) |
1853 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
1854 | #else | |
726f6388 | 1855 | vsprintf (msg_buf, format, args); |
f73dda09 JA |
1856 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1857 | #endif | |
726f6388 JA |
1858 | va_end (args); |
1859 | ||
6e70dbff CR |
1860 | if (saved_local_prompt == 0) |
1861 | { | |
1862 | rl_save_prompt (); | |
1863 | msg_saved_prompt = 1; | |
1864 | } | |
726f6388 | 1865 | rl_display_prompt = msg_buf; |
6e70dbff CR |
1866 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
1867 | &prompt_last_invisible, | |
1868 | &prompt_invis_chars_first_line, | |
1869 | &prompt_physical_chars); | |
1870 | local_prompt_prefix = (char *)NULL; | |
ccc6cda3 | 1871 | (*rl_redisplay_function) (); |
6e70dbff | 1872 | |
726f6388 JA |
1873 | return 0; |
1874 | } | |
ccc6cda3 JA |
1875 | #else /* !USE_VARARGS */ |
1876 | int | |
726f6388 JA |
1877 | rl_message (format, arg1, arg2) |
1878 | char *format; | |
1879 | { | |
1880 | sprintf (msg_buf, format, arg1, arg2); | |
f73dda09 | 1881 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
6e70dbff | 1882 | |
726f6388 | 1883 | rl_display_prompt = msg_buf; |
6e70dbff CR |
1884 | if (saved_local_prompt == 0) |
1885 | { | |
1886 | rl_save_prompt (); | |
1887 | msg_saved_prompt = 1; | |
1888 | } | |
1889 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, | |
1890 | &prompt_last_invisible, | |
1891 | &prompt_invis_chars_first_line, | |
1892 | &prompt_physical_chars); | |
1893 | local_prompt_prefix = (char *)NULL; | |
ccc6cda3 | 1894 | (*rl_redisplay_function) (); |
6e70dbff | 1895 | |
726f6388 JA |
1896 | return 0; |
1897 | } | |
ccc6cda3 | 1898 | #endif /* !USE_VARARGS */ |
726f6388 JA |
1899 | |
1900 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 1901 | int |
726f6388 JA |
1902 | rl_clear_message () |
1903 | { | |
1904 | rl_display_prompt = rl_prompt; | |
6e70dbff CR |
1905 | if (msg_saved_prompt) |
1906 | { | |
1907 | rl_restore_prompt (); | |
1908 | msg_saved_prompt = 0; | |
1909 | } | |
ccc6cda3 | 1910 | (*rl_redisplay_function) (); |
726f6388 JA |
1911 | return 0; |
1912 | } | |
1913 | ||
ccc6cda3 | 1914 | int |
726f6388 JA |
1915 | rl_reset_line_state () |
1916 | { | |
1917 | rl_on_new_line (); | |
1918 | ||
1919 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
1920 | forced_display = 1; | |
1921 | return 0; | |
1922 | } | |
1923 | ||
ccc6cda3 | 1924 | void |
b72432fd | 1925 | rl_save_prompt () |
ccc6cda3 JA |
1926 | { |
1927 | saved_local_prompt = local_prompt; | |
1928 | saved_local_prefix = local_prompt_prefix; | |
6e70dbff | 1929 | saved_prefix_length = prompt_prefix_length; |
28ef6c31 JA |
1930 | saved_last_invisible = prompt_last_invisible; |
1931 | saved_visible_length = prompt_visible_length; | |
d3a24ed2 | 1932 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
762a763b | 1933 | saved_physical_chars = prompt_physical_chars; |
ccc6cda3 JA |
1934 | |
1935 | local_prompt = local_prompt_prefix = (char *)0; | |
6e70dbff | 1936 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
762a763b | 1937 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
1938 | } |
1939 | ||
1940 | void | |
b72432fd | 1941 | rl_restore_prompt () |
ccc6cda3 | 1942 | { |
28ef6c31 JA |
1943 | FREE (local_prompt); |
1944 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
1945 | |
1946 | local_prompt = saved_local_prompt; | |
1947 | local_prompt_prefix = saved_local_prefix; | |
6e70dbff | 1948 | prompt_prefix_length = saved_prefix_length; |
28ef6c31 JA |
1949 | prompt_last_invisible = saved_last_invisible; |
1950 | prompt_visible_length = saved_visible_length; | |
d3a24ed2 | 1951 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
762a763b | 1952 | prompt_physical_chars = saved_physical_chars; |
6e70dbff CR |
1953 | |
1954 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
1955 | saved_local_prompt = saved_local_prefix = (char *)0; | |
1956 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; | |
1957 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
ccc6cda3 JA |
1958 | } |
1959 | ||
1960 | char * | |
1961 | _rl_make_prompt_for_search (pchar) | |
1962 | int pchar; | |
1963 | { | |
1964 | int len; | |
1965 | char *pmt; | |
1966 | ||
b72432fd | 1967 | rl_save_prompt (); |
ccc6cda3 JA |
1968 | |
1969 | if (saved_local_prompt == 0) | |
1970 | { | |
1971 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
f73dda09 | 1972 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 1973 | if (len) |
b72432fd | 1974 | strcpy (pmt, rl_prompt); |
ccc6cda3 JA |
1975 | pmt[len] = pchar; |
1976 | pmt[len+1] = '\0'; | |
1977 | } | |
1978 | else | |
1979 | { | |
1980 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; | |
f73dda09 | 1981 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 1982 | if (len) |
b72432fd | 1983 | strcpy (pmt, saved_local_prompt); |
ccc6cda3 JA |
1984 | pmt[len] = pchar; |
1985 | pmt[len+1] = '\0'; | |
1986 | local_prompt = savestring (pmt); | |
28ef6c31 JA |
1987 | prompt_last_invisible = saved_last_invisible; |
1988 | prompt_visible_length = saved_visible_length + 1; | |
ccc6cda3 | 1989 | } |
762a763b | 1990 | |
6e70dbff CR |
1991 | prompt_physical_chars = saved_physical_chars + 1; |
1992 | ||
ccc6cda3 JA |
1993 | return pmt; |
1994 | } | |
1995 | ||
726f6388 JA |
1996 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
1997 | void | |
1998 | _rl_erase_at_end_of_line (l) | |
1999 | int l; | |
2000 | { | |
2001 | register int i; | |
2002 | ||
ccc6cda3 | 2003 | _rl_backspace (l); |
726f6388 JA |
2004 | for (i = 0; i < l; i++) |
2005 | putc (' ', rl_outstream); | |
ccc6cda3 | 2006 | _rl_backspace (l); |
726f6388 JA |
2007 | for (i = 0; i < l; i++) |
2008 | visible_line[--_rl_last_c_pos] = '\0'; | |
2009 | rl_display_fixed++; | |
2010 | } | |
2011 | ||
2012 | /* Clear to the end of the line. COUNT is the minimum | |
2013 | number of character spaces to clear, */ | |
d166f048 JA |
2014 | void |
2015 | _rl_clear_to_eol (count) | |
726f6388 JA |
2016 | int count; |
2017 | { | |
28ef6c31 JA |
2018 | if (_rl_term_clreol) |
2019 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d166f048 | 2020 | else if (count) |
726f6388 JA |
2021 | space_to_eol (count); |
2022 | } | |
2023 | ||
2024 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2025 | number of character spaces to clear, */ | |
2026 | static void | |
2027 | space_to_eol (count) | |
2028 | int count; | |
2029 | { | |
2030 | register int i; | |
2031 | ||
2032 | for (i = 0; i < count; i++) | |
2033 | putc (' ', rl_outstream); | |
2034 | ||
2035 | _rl_last_c_pos += count; | |
2036 | } | |
2037 | ||
d166f048 JA |
2038 | void |
2039 | _rl_clear_screen () | |
2040 | { | |
28ef6c31 JA |
2041 | if (_rl_term_clrpag) |
2042 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 2043 | else |
28ef6c31 | 2044 | rl_crlf (); |
d166f048 JA |
2045 | } |
2046 | ||
7117c2d2 | 2047 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 2048 | static void |
7117c2d2 | 2049 | insert_some_chars (string, count, col) |
726f6388 | 2050 | char *string; |
7117c2d2 | 2051 | int count, col; |
726f6388 | 2052 | { |
9607141c CR |
2053 | #if defined (__MSDOS__) || defined (__MINGW32__) |
2054 | _rl_output_some_chars (string, count); | |
2055 | #else | |
7117c2d2 JA |
2056 | /* DEBUGGING */ |
2057 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2058 | if (count != col) | |
2059 | fprintf(stderr, "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); | |
2060 | ||
726f6388 | 2061 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2062 | if (_rl_term_IC) |
726f6388 | 2063 | { |
ccc6cda3 | 2064 | char *buffer; |
7117c2d2 JA |
2065 | |
2066 | buffer = tgoto (_rl_term_IC, 0, col); | |
726f6388 JA |
2067 | tputs (buffer, 1, _rl_output_character_function); |
2068 | _rl_output_some_chars (string, count); | |
2069 | } | |
2070 | else | |
2071 | { | |
2072 | register int i; | |
2073 | ||
2074 | /* If we have to turn on insert-mode, then do so. */ | |
28ef6c31 JA |
2075 | if (_rl_term_im && *_rl_term_im) |
2076 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
726f6388 JA |
2077 | |
2078 | /* If there is a special command for inserting characters, then | |
2079 | use that first to open up the space. */ | |
28ef6c31 | 2080 | if (_rl_term_ic && *_rl_term_ic) |
726f6388 | 2081 | { |
7117c2d2 | 2082 | for (i = col; i--; ) |
28ef6c31 | 2083 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
726f6388 JA |
2084 | } |
2085 | ||
2086 | /* Print the text. */ | |
2087 | _rl_output_some_chars (string, count); | |
2088 | ||
2089 | /* If there is a string to turn off insert mode, we had best use | |
2090 | it now. */ | |
28ef6c31 JA |
2091 | if (_rl_term_ei && *_rl_term_ei) |
2092 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
726f6388 | 2093 | } |
9607141c | 2094 | #endif /* __MSDOS__ || __MINGW32__ */ |
726f6388 JA |
2095 | } |
2096 | ||
2097 | /* Delete COUNT characters from the display line. */ | |
2098 | static void | |
2099 | delete_chars (count) | |
2100 | int count; | |
2101 | { | |
28ef6c31 | 2102 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2103 | return; |
2104 | ||
9607141c | 2105 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
28ef6c31 | 2106 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2107 | { |
ccc6cda3 | 2108 | char *buffer; |
28ef6c31 | 2109 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2110 | tputs (buffer, count, _rl_output_character_function); |
2111 | } | |
2112 | else | |
2113 | { | |
28ef6c31 | 2114 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2115 | while (count--) |
28ef6c31 | 2116 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2117 | } |
9607141c | 2118 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
726f6388 JA |
2119 | } |
2120 | ||
2121 | void | |
2122 | _rl_update_final () | |
2123 | { | |
2124 | int full_lines; | |
2125 | ||
2126 | full_lines = 0; | |
ccc6cda3 JA |
2127 | /* If the cursor is the only thing on an otherwise-blank last line, |
2128 | compensate so we don't print an extra CRLF. */ | |
2129 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2130 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2131 | { |
2132 | _rl_vis_botlin--; | |
2133 | full_lines = 1; | |
2134 | } | |
2135 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2136 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2137 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2138 | { |
726f6388 | 2139 | char *last_line; |
7117c2d2 | 2140 | |
bb70624e | 2141 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
28ef6c31 | 2142 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
d166f048 | 2143 | _rl_clear_to_eol (0); |
28ef6c31 | 2144 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2145 | } |
2146 | _rl_vis_botlin = 0; | |
28ef6c31 | 2147 | rl_crlf (); |
726f6388 JA |
2148 | fflush (rl_outstream); |
2149 | rl_display_fixed++; | |
2150 | } | |
2151 | ||
2152 | /* Move to the start of the current line. */ | |
2153 | static void | |
2154 | cr () | |
2155 | { | |
28ef6c31 | 2156 | if (_rl_term_cr) |
726f6388 | 2157 | { |
bb70624e JA |
2158 | #if defined (__MSDOS__) |
2159 | putc ('\r', rl_outstream); | |
2160 | #else | |
28ef6c31 | 2161 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2162 | #endif |
726f6388 JA |
2163 | _rl_last_c_pos = 0; |
2164 | } | |
2165 | } | |
2166 | ||
bb70624e JA |
2167 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2168 | terminal escape sequences. Called with the cursor at column 0 of the | |
2169 | line to draw the prompt on. */ | |
2170 | static void | |
2171 | redraw_prompt (t) | |
2172 | char *t; | |
2173 | { | |
6e70dbff | 2174 | char *oldp; |
bb70624e | 2175 | |
bb70624e | 2176 | oldp = rl_display_prompt; |
6e70dbff | 2177 | rl_save_prompt (); |
bb70624e JA |
2178 | |
2179 | rl_display_prompt = t; | |
28ef6c31 JA |
2180 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2181 | &prompt_last_invisible, | |
43cdcad8 CR |
2182 | &prompt_invis_chars_first_line, |
2183 | &prompt_physical_chars); | |
bb70624e | 2184 | local_prompt_prefix = (char *)NULL; |
6e70dbff | 2185 | |
bb70624e JA |
2186 | rl_forced_update_display (); |
2187 | ||
2188 | rl_display_prompt = oldp; | |
6e70dbff | 2189 | rl_restore_prompt(); |
bb70624e JA |
2190 | } |
2191 | ||
726f6388 JA |
2192 | /* Redisplay the current line after a SIGWINCH is received. */ |
2193 | void | |
2194 | _rl_redisplay_after_sigwinch () | |
2195 | { | |
bb70624e | 2196 | char *t; |
726f6388 JA |
2197 | |
2198 | /* Clear the current line and put the cursor at column 0. Make sure | |
2199 | the right thing happens if we have wrapped to a new screen line. */ | |
28ef6c31 | 2200 | if (_rl_term_cr) |
726f6388 | 2201 | { |
bb70624e JA |
2202 | #if defined (__MSDOS__) |
2203 | putc ('\r', rl_outstream); | |
2204 | #else | |
28ef6c31 | 2205 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2206 | #endif |
726f6388 | 2207 | _rl_last_c_pos = 0; |
bb70624e | 2208 | #if defined (__MSDOS__) |
28ef6c31 | 2209 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2210 | putc ('\r', rl_outstream); |
2211 | #else | |
28ef6c31 JA |
2212 | if (_rl_term_clreol) |
2213 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2214 | else |
2215 | { | |
28ef6c31 JA |
2216 | space_to_eol (_rl_screenwidth); |
2217 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2218 | } |
bb70624e | 2219 | #endif |
726f6388 JA |
2220 | if (_rl_last_v_pos > 0) |
2221 | _rl_move_vert (0); | |
2222 | } | |
2223 | else | |
28ef6c31 | 2224 | rl_crlf (); |
726f6388 JA |
2225 | |
2226 | /* Redraw only the last line of a multi-line prompt. */ | |
2227 | t = strrchr (rl_display_prompt, '\n'); | |
2228 | if (t) | |
bb70624e | 2229 | redraw_prompt (++t); |
726f6388 JA |
2230 | else |
2231 | rl_forced_update_display (); | |
2232 | } | |
ccc6cda3 JA |
2233 | |
2234 | void | |
2235 | _rl_clean_up_for_exit () | |
2236 | { | |
2237 | if (readline_echoing_p) | |
2238 | { | |
2239 | _rl_move_vert (_rl_vis_botlin); | |
2240 | _rl_vis_botlin = 0; | |
2241 | fflush (rl_outstream); | |
b72432fd | 2242 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2243 | } |
2244 | } | |
b72432fd JA |
2245 | |
2246 | void | |
2247 | _rl_erase_entire_line () | |
2248 | { | |
2249 | cr (); | |
2250 | _rl_clear_to_eol (0); | |
2251 | cr (); | |
2252 | fflush (rl_outstream); | |
2253 | } | |
bb70624e JA |
2254 | |
2255 | /* return the `current display line' of the cursor -- the number of lines to | |
2256 | move up to get to the first screen line of the current readline line. */ | |
2257 | int | |
2258 | _rl_current_display_line () | |
2259 | { | |
2260 | int ret, nleft; | |
2261 | ||
2262 | /* Find out whether or not there might be invisible characters in the | |
2263 | editing buffer. */ | |
2264 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2265 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2266 | else |
28ef6c31 | 2267 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2268 | |
2269 | if (nleft > 0) | |
28ef6c31 | 2270 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2271 | else |
2272 | ret = 0; | |
2273 | ||
2274 | return ret; | |
2275 | } | |
7117c2d2 JA |
2276 | |
2277 | #if defined (HANDLE_MULTIBYTE) | |
2278 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2279 | In the case of multibyte characters with stateful encoding, we have to | |
2280 | scan from the beginning of the string to take the state into account. */ | |
2281 | static int | |
2282 | _rl_col_width (str, start, end) | |
d3a24ed2 | 2283 | const char *str; |
7117c2d2 JA |
2284 | int start, end; |
2285 | { | |
2286 | wchar_t wc; | |
2287 | mbstate_t ps = {0}; | |
2288 | int tmp, point, width, max; | |
2289 | ||
2290 | if (end <= start) | |
2291 | return 0; | |
2292 | ||
2293 | point = 0; | |
2294 | max = end; | |
2295 | ||
2296 | while (point < start) | |
2297 | { | |
2298 | tmp = mbrlen (str + point, max, &ps); | |
d3a24ed2 | 2299 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2300 | { |
2301 | /* In this case, the bytes are invalid or too short to compose a | |
2302 | multibyte character, so we assume that the first byte represents | |
2303 | a single character. */ | |
2304 | point++; | |
2305 | max--; | |
2306 | ||
2307 | /* Clear the state of the byte sequence, because in this case the | |
2308 | effect of mbstate is undefined. */ | |
2309 | memset (&ps, 0, sizeof (mbstate_t)); | |
2310 | } | |
d3a24ed2 | 2311 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2312 | break; /* Found '\0' */ |
7117c2d2 JA |
2313 | else |
2314 | { | |
2315 | point += tmp; | |
2316 | max -= tmp; | |
2317 | } | |
2318 | } | |
2319 | ||
2320 | /* If START is not a byte that starts a character, then POINT will be | |
2321 | greater than START. In this case, assume that (POINT - START) gives | |
2322 | a byte count that is the number of columns of difference. */ | |
2323 | width = point - start; | |
2324 | ||
2325 | while (point < end) | |
2326 | { | |
2327 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
d3a24ed2 | 2328 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2329 | { |
2330 | /* In this case, the bytes are invalid or too short to compose a | |
2331 | multibyte character, so we assume that the first byte represents | |
2332 | a single character. */ | |
2333 | point++; | |
2334 | max--; | |
2335 | ||
2336 | /* and assume that the byte occupies a single column. */ | |
2337 | width++; | |
2338 | ||
2339 | /* Clear the state of the byte sequence, because in this case the | |
2340 | effect of mbstate is undefined. */ | |
2341 | memset (&ps, 0, sizeof (mbstate_t)); | |
2342 | } | |
d3a24ed2 | 2343 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2344 | break; /* Found '\0' */ |
7117c2d2 JA |
2345 | else |
2346 | { | |
2347 | point += tmp; | |
2348 | max -= tmp; | |
2349 | tmp = wcwidth(wc); | |
2350 | width += (tmp >= 0) ? tmp : 1; | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | width += point - end; | |
2355 | ||
2356 | return width; | |
2357 | } | |
2358 | #endif /* HANDLE_MULTIBYTE */ |