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Commit | Line | Data |
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726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
cc87ba64 | 3 | /* Copyright (C) 1987-2005 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of the GNU Readline Library, a library for | |
6 | reading lines of text with interactive input and history editing. | |
7 | ||
8 | The GNU Readline Library is free software; you can redistribute it | |
9 | and/or modify it under the terms of the GNU General Public License | |
bb70624e | 10 | as published by the Free Software Foundation; either version 2, or |
726f6388 JA |
11 | (at your option) any later version. |
12 | ||
13 | The GNU Readline Library is distributed in the hope that it will be | |
14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | The GNU General Public License is often shipped with GNU software, and | |
19 | is generally kept in a file called COPYING or LICENSE. If you do not | |
20 | have a copy of the license, write to the Free Software Foundation, | |
bb70624e | 21 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 JA |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
ccc6cda3 | 25 | # include <config.h> |
726f6388 JA |
26 | #endif |
27 | ||
726f6388 JA |
28 | #include <sys/types.h> |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
d166f048 JA |
34 | #include "posixstat.h" |
35 | ||
726f6388 JA |
36 | #if defined (HAVE_STDLIB_H) |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
d166f048 JA |
42 | #include <stdio.h> |
43 | ||
726f6388 JA |
44 | /* System-specific feature definitions and include files. */ |
45 | #include "rldefs.h" | |
7117c2d2 | 46 | #include "rlmbutil.h" |
726f6388 | 47 | |
ccc6cda3 JA |
48 | /* Termcap library stuff. */ |
49 | #include "tcap.h" | |
50 | ||
726f6388 JA |
51 | /* Some standard library routines. */ |
52 | #include "readline.h" | |
53 | #include "history.h" | |
54 | ||
bb70624e JA |
55 | #include "rlprivate.h" |
56 | #include "xmalloc.h" | |
57 | ||
726f6388 JA |
58 | #if !defined (strchr) && !defined (__STDC__) |
59 | extern char *strchr (), *strrchr (); | |
60 | #endif /* !strchr && !__STDC__ */ | |
61 | ||
bb70624e | 62 | #if defined (HACK_TERMCAP_MOTION) |
28ef6c31 | 63 | extern char *_rl_term_forward_char; |
cce855bc | 64 | #endif |
726f6388 | 65 | |
f73dda09 JA |
66 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
67 | static void space_to_eol PARAMS((int)); | |
68 | static void delete_chars PARAMS((int)); | |
7117c2d2 | 69 | static void insert_some_chars PARAMS((char *, int, int)); |
f73dda09 | 70 | static void cr PARAMS((void)); |
ccc6cda3 | 71 | |
7117c2d2 | 72 | #if defined (HANDLE_MULTIBYTE) |
d3a24ed2 | 73 | static int _rl_col_width PARAMS((const char *, int, int)); |
7117c2d2 JA |
74 | static int *_rl_wrapped_line; |
75 | #else | |
76 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
77 | #endif | |
78 | ||
ccc6cda3 | 79 | static int *inv_lbreaks, *vis_lbreaks; |
bb70624e | 80 | static int inv_lbsize, vis_lbsize; |
726f6388 JA |
81 | |
82 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
83 | by backing up or outputting a carriage return and moving forward. */ | |
84 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
85 | ||
86 | /* **************************************************************** */ | |
87 | /* */ | |
88 | /* Display stuff */ | |
89 | /* */ | |
90 | /* **************************************************************** */ | |
91 | ||
92 | /* This is the stuff that is hard for me. I never seem to write good | |
93 | display routines in C. Let's see how I do this time. */ | |
94 | ||
95 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
96 | the problems of input lines longer than the screen width. | |
97 | ||
98 | update_line and the code that calls it makes a multiple line, | |
99 | automatically wrapping line update. Careful attention needs | |
100 | to be paid to the vertical position variables. */ | |
101 | ||
102 | /* Keep two buffers; one which reflects the current contents of the | |
103 | screen, and the other to draw what we think the new contents should | |
104 | be. Then compare the buffers, and make whatever changes to the | |
105 | screen itself that we should. Finally, make the buffer that we | |
106 | just drew into be the one which reflects the current contents of the | |
107 | screen, and place the cursor where it belongs. | |
108 | ||
109 | Commands that want to can fix the display themselves, and then let | |
110 | this function know that the display has been fixed by setting the | |
111 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
112 | ||
ccc6cda3 | 113 | /* Application-specific redisplay function. */ |
28ef6c31 | 114 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 115 | |
726f6388 JA |
116 | /* Global variables declared here. */ |
117 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
118 | int rl_display_fixed = 0; | |
119 | ||
ccc6cda3 | 120 | int _rl_suppress_redisplay = 0; |
798a67db | 121 | int _rl_want_redisplay = 0; |
ccc6cda3 | 122 | |
726f6388 JA |
123 | /* The stuff that gets printed out before the actual text of the line. |
124 | This is usually pointing to rl_prompt. */ | |
125 | char *rl_display_prompt = (char *)NULL; | |
126 | ||
127 | /* Pseudo-global variables declared here. */ | |
177d51f7 | 128 | |
726f6388 | 129 | /* The visible cursor position. If you print some text, adjust this. */ |
177d51f7 CR |
130 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
131 | supporting multibyte characters, and an absolute cursor position when | |
132 | in such a locale. This is an artifact of the donated multibyte support. | |
133 | Care must be taken when modifying its value. */ | |
726f6388 JA |
134 | int _rl_last_c_pos = 0; |
135 | int _rl_last_v_pos = 0; | |
136 | ||
137 | /* Number of lines currently on screen minus 1. */ | |
138 | int _rl_vis_botlin = 0; | |
139 | ||
140 | /* Variables used only in this file. */ | |
141 | /* The last left edge of text that was displayed. This is used when | |
142 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 143 | static int last_lmargin; |
726f6388 JA |
144 | |
145 | /* The line display buffers. One is the line currently displayed on | |
146 | the screen. The other is the line about to be displayed. */ | |
147 | static char *visible_line = (char *)NULL; | |
148 | static char *invisible_line = (char *)NULL; | |
149 | ||
150 | /* A buffer for `modeline' messages. */ | |
151 | static char msg_buf[128]; | |
152 | ||
153 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 154 | static int forced_display; |
726f6388 JA |
155 | |
156 | /* Default and initial buffer size. Can grow. */ | |
157 | static int line_size = 1024; | |
158 | ||
28ef6c31 JA |
159 | /* Variables to keep track of the expanded prompt string, which may |
160 | include invisible characters. */ | |
161 | ||
726f6388 | 162 | static char *local_prompt, *local_prompt_prefix; |
28ef6c31 | 163 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
164 | |
165 | /* The number of invisible characters in the line currently being | |
166 | displayed on the screen. */ | |
ccc6cda3 JA |
167 | static int visible_wrap_offset; |
168 | ||
28ef6c31 JA |
169 | /* The number of invisible characters in the prompt string. Static so it |
170 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
171 | static int wrap_offset; |
172 | ||
28ef6c31 JA |
173 | /* The index of the last invisible character in the prompt string. */ |
174 | static int prompt_last_invisible; | |
726f6388 JA |
175 | |
176 | /* The length (buffer offset) of the first line of the last (possibly | |
177 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 178 | static int visible_first_line_len; |
726f6388 | 179 | |
28ef6c31 JA |
180 | /* Number of invisible characters on the first physical line of the prompt. |
181 | Only valid when the number of physical characters in the prompt exceeds | |
182 | (or is equal to) _rl_screenwidth. */ | |
183 | static int prompt_invis_chars_first_line; | |
184 | ||
185 | static int prompt_last_screen_line; | |
186 | ||
43cdcad8 CR |
187 | static int prompt_physical_chars; |
188 | ||
6e70dbff CR |
189 | /* Variables to save and restore prompt and display information. */ |
190 | ||
191 | /* These are getting numerous enough that it's time to create a struct. */ | |
192 | ||
193 | static char *saved_local_prompt; | |
194 | static char *saved_local_prefix; | |
195 | static int saved_last_invisible; | |
196 | static int saved_visible_length; | |
197 | static int saved_prefix_length; | |
198 | static int saved_invis_chars_first_line; | |
199 | static int saved_physical_chars; | |
200 | ||
726f6388 JA |
201 | /* Expand the prompt string S and return the number of visible |
202 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 203 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
204 | index of the last invisible character in the returned string. NIFLP, |
205 | if non-zero, is a place to store the number of invisible characters in | |
43cdcad8 CR |
206 | the first prompt line. The previous are used as byte counts -- indexes |
207 | into a character buffer. */ | |
726f6388 JA |
208 | |
209 | /* Current implementation: | |
210 | \001 (^A) start non-visible characters | |
211 | \002 (^B) end non-visible characters | |
212 | all characters except \001 and \002 (following a \001) are copied to | |
213 | the returned string; all characters except those between \001 and | |
214 | \002 are assumed to be `visible'. */ | |
215 | ||
216 | static char * | |
43cdcad8 | 217 | expand_prompt (pmt, lp, lip, niflp, vlp) |
726f6388 | 218 | char *pmt; |
43cdcad8 | 219 | int *lp, *lip, *niflp, *vlp; |
726f6388 JA |
220 | { |
221 | char *r, *ret, *p; | |
b954488b | 222 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
726f6388 JA |
223 | |
224 | /* Short-circuit if we can. */ | |
43cdcad8 | 225 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 JA |
226 | { |
227 | r = savestring (pmt); | |
228 | if (lp) | |
229 | *lp = strlen (r); | |
43cdcad8 CR |
230 | if (lip) |
231 | *lip = 0; | |
232 | if (niflp) | |
233 | *niflp = 0; | |
234 | if (vlp) | |
235 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
236 | return r; |
237 | } | |
238 | ||
ccc6cda3 | 239 | l = strlen (pmt); |
f73dda09 | 240 | r = ret = (char *)xmalloc (l + 1); |
28ef6c31 JA |
241 | |
242 | invfl = 0; /* invisible chars in first line of prompt */ | |
b954488b | 243 | invflset = 0; /* we only want to set invfl once */ |
28ef6c31 | 244 | |
43cdcad8 | 245 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
726f6388 JA |
246 | { |
247 | /* This code strips the invisible character string markers | |
248 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
249 | if (*p == RL_PROMPT_START_IGNORE) | |
250 | { | |
251 | ignoring++; | |
252 | continue; | |
253 | } | |
254 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
255 | { | |
256 | ignoring = 0; | |
1569c106 CR |
257 | if (p[-1] != RL_PROMPT_START_IGNORE) |
258 | last = r - ret - 1; | |
726f6388 JA |
259 | continue; |
260 | } | |
261 | else | |
262 | { | |
43cdcad8 CR |
263 | #if defined (HANDLE_MULTIBYTE) |
264 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
265 | { | |
266 | pind = p - pmt; | |
267 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
268 | l = ind - pind; | |
269 | while (l--) | |
270 | *r++ = *p++; | |
271 | if (!ignoring) | |
37c41ab1 CR |
272 | { |
273 | rl += ind - pind; | |
274 | physchars += _rl_col_width (pmt, pind, ind); | |
275 | } | |
43cdcad8 CR |
276 | else |
277 | ninvis += ind - pind; | |
278 | p--; /* compensate for later increment */ | |
279 | } | |
28ef6c31 | 280 | else |
43cdcad8 CR |
281 | #endif |
282 | { | |
283 | *r++ = *p; | |
284 | if (!ignoring) | |
37c41ab1 CR |
285 | { |
286 | rl++; /* visible length byte counter */ | |
287 | physchars++; | |
288 | } | |
43cdcad8 CR |
289 | else |
290 | ninvis++; /* invisible chars byte counter */ | |
291 | } | |
292 | ||
b954488b CR |
293 | if (invflset == 0 && rl >= _rl_screenwidth) |
294 | { | |
295 | invfl = ninvis; | |
296 | invflset = 1; | |
297 | } | |
726f6388 JA |
298 | } |
299 | } | |
300 | ||
28ef6c31 JA |
301 | if (rl < _rl_screenwidth) |
302 | invfl = ninvis; | |
303 | ||
726f6388 JA |
304 | *r = '\0'; |
305 | if (lp) | |
306 | *lp = rl; | |
ccc6cda3 JA |
307 | if (lip) |
308 | *lip = last; | |
28ef6c31 JA |
309 | if (niflp) |
310 | *niflp = invfl; | |
43cdcad8 CR |
311 | if (vlp) |
312 | *vlp = physchars; | |
726f6388 JA |
313 | return ret; |
314 | } | |
315 | ||
bb70624e JA |
316 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
317 | PMT and return the rest of PMT. */ | |
318 | char * | |
319 | _rl_strip_prompt (pmt) | |
320 | char *pmt; | |
321 | { | |
322 | char *ret; | |
323 | ||
43cdcad8 | 324 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
325 | return ret; |
326 | } | |
327 | ||
726f6388 JA |
328 | /* |
329 | * Expand the prompt string into the various display components, if | |
330 | * necessary. | |
331 | * | |
332 | * local_prompt = expanded last line of string in rl_display_prompt | |
333 | * (portion after the final newline) | |
334 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
335 | * expanded via expand_prompt | |
28ef6c31 JA |
336 | * prompt_visible_length = number of visible characters in local_prompt |
337 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
338 | * |
339 | * This function is called once per call to readline(). It may also be | |
340 | * called arbitrarily to expand the primary prompt. | |
341 | * | |
342 | * The return value is the number of visible characters on the last line | |
343 | * of the (possibly multi-line) prompt. | |
344 | */ | |
345 | int | |
346 | rl_expand_prompt (prompt) | |
347 | char *prompt; | |
348 | { | |
349 | char *p, *t; | |
350 | int c; | |
351 | ||
352 | /* Clear out any saved values. */ | |
28ef6c31 JA |
353 | FREE (local_prompt); |
354 | FREE (local_prompt_prefix); | |
355 | ||
726f6388 | 356 | local_prompt = local_prompt_prefix = (char *)0; |
ec2199bd CR |
357 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
358 | prompt_visible_length = prompt_physical_chars = 0; | |
726f6388 | 359 | |
ccc6cda3 | 360 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
361 | return (0); |
362 | ||
363 | p = strrchr (prompt, '\n'); | |
364 | if (!p) | |
365 | { | |
28ef6c31 JA |
366 | /* The prompt is only one logical line, though it might wrap. */ |
367 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
368 | &prompt_last_invisible, | |
43cdcad8 CR |
369 | &prompt_invis_chars_first_line, |
370 | &prompt_physical_chars); | |
726f6388 | 371 | local_prompt_prefix = (char *)0; |
28ef6c31 | 372 | return (prompt_visible_length); |
726f6388 JA |
373 | } |
374 | else | |
375 | { | |
376 | /* The prompt spans multiple lines. */ | |
377 | t = ++p; | |
28ef6c31 JA |
378 | local_prompt = expand_prompt (p, &prompt_visible_length, |
379 | &prompt_last_invisible, | |
43cdcad8 | 380 | (int *)NULL, |
e6e3b444 | 381 | &prompt_physical_chars); |
726f6388 JA |
382 | c = *t; *t = '\0'; |
383 | /* The portion of the prompt string up to and including the | |
384 | final newline is now null-terminated. */ | |
28ef6c31 JA |
385 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
386 | (int *)NULL, | |
43cdcad8 | 387 | &prompt_invis_chars_first_line, |
e6e3b444 | 388 | (int *)NULL); |
726f6388 | 389 | *t = c; |
28ef6c31 | 390 | return (prompt_prefix_length); |
726f6388 JA |
391 | } |
392 | } | |
393 | ||
bb70624e JA |
394 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
395 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
396 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
397 | increased. If the lines have already been allocated, this ensures that | |
398 | they can hold at least MINSIZE characters. */ | |
399 | static void | |
400 | init_line_structures (minsize) | |
401 | int minsize; | |
402 | { | |
403 | register int n; | |
404 | ||
405 | if (invisible_line == 0) /* initialize it */ | |
406 | { | |
407 | if (line_size < minsize) | |
408 | line_size = minsize; | |
f73dda09 JA |
409 | visible_line = (char *)xmalloc (line_size); |
410 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
411 | } |
412 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
413 | { | |
414 | line_size *= 2; | |
415 | if (line_size < minsize) | |
416 | line_size = minsize; | |
f73dda09 JA |
417 | visible_line = (char *)xrealloc (visible_line, line_size); |
418 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
419 | } |
420 | ||
421 | for (n = minsize; n < line_size; n++) | |
422 | { | |
423 | visible_line[n] = 0; | |
424 | invisible_line[n] = 1; | |
425 | } | |
426 | ||
427 | if (vis_lbreaks == 0) | |
428 | { | |
429 | /* should be enough. */ | |
430 | inv_lbsize = vis_lbsize = 256; | |
431 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
432 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
7117c2d2 JA |
433 | #if defined (HANDLE_MULTIBYTE) |
434 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
435 | #endif | |
bb70624e JA |
436 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
437 | } | |
438 | } | |
439 | ||
726f6388 JA |
440 | /* Basic redisplay algorithm. */ |
441 | void | |
442 | rl_redisplay () | |
443 | { | |
ccc6cda3 JA |
444 | register int in, out, c, linenum, cursor_linenum; |
445 | register char *line; | |
446 | int c_pos, inv_botlin, lb_botlin, lb_linenum; | |
37c41ab1 | 447 | int newlines, lpos, temp, modmark, n0, num; |
726f6388 | 448 | char *prompt_this_line; |
7117c2d2 JA |
449 | #if defined (HANDLE_MULTIBYTE) |
450 | wchar_t wc; | |
451 | size_t wc_bytes; | |
452 | int wc_width; | |
453 | mbstate_t ps; | |
454 | int _rl_wrapped_multicolumn = 0; | |
455 | #endif | |
726f6388 JA |
456 | |
457 | if (!readline_echoing_p) | |
458 | return; | |
459 | ||
460 | if (!rl_display_prompt) | |
461 | rl_display_prompt = ""; | |
462 | ||
055a1bf5 | 463 | if (invisible_line == 0 || vis_lbreaks == 0) |
726f6388 | 464 | { |
bb70624e | 465 | init_line_structures (0); |
726f6388 JA |
466 | rl_on_new_line (); |
467 | } | |
468 | ||
469 | /* Draw the line into the buffer. */ | |
470 | c_pos = -1; | |
471 | ||
ccc6cda3 JA |
472 | line = invisible_line; |
473 | out = inv_botlin = 0; | |
474 | ||
726f6388 JA |
475 | /* Mark the line as modified or not. We only do this for history |
476 | lines. */ | |
43cdcad8 | 477 | modmark = 0; |
726f6388 JA |
478 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
479 | { | |
480 | line[out++] = '*'; | |
481 | line[out] = '\0'; | |
43cdcad8 | 482 | modmark = 1; |
726f6388 JA |
483 | } |
484 | ||
485 | /* If someone thought that the redisplay was handled, but the currently | |
486 | visible line has a different modification state than the one about | |
487 | to become visible, then correct the caller's misconception. */ | |
488 | if (visible_line[0] != invisible_line[0]) | |
489 | rl_display_fixed = 0; | |
490 | ||
491 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
492 | one passed to readline()), use the values we have already expanded. | |
493 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
494 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 495 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 JA |
496 | { |
497 | int local_len = local_prompt ? strlen (local_prompt) : 0; | |
498 | if (local_prompt_prefix && forced_display) | |
499 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
500 | ||
501 | if (local_len > 0) | |
ccc6cda3 | 502 | { |
b72432fd JA |
503 | temp = local_len + out + 2; |
504 | if (temp >= line_size) | |
505 | { | |
506 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
507 | visible_line = (char *)xrealloc (visible_line, line_size); |
508 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 509 | } |
ccc6cda3 JA |
510 | strncpy (line + out, local_prompt, local_len); |
511 | out += local_len; | |
512 | } | |
726f6388 | 513 | line[out] = '\0'; |
28ef6c31 | 514 | wrap_offset = local_len - prompt_visible_length; |
726f6388 JA |
515 | } |
516 | else | |
517 | { | |
518 | int pmtlen; | |
519 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
520 | if (!prompt_this_line) | |
521 | prompt_this_line = rl_display_prompt; | |
522 | else | |
523 | { | |
524 | prompt_this_line++; | |
bb70624e | 525 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 526 | if (forced_display) |
ccc6cda3 | 527 | { |
bb70624e | 528 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
529 | /* Make sure we are at column zero even after a newline, |
530 | regardless of the state of terminal output processing. */ | |
bb70624e | 531 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
532 | cr (); |
533 | } | |
726f6388 JA |
534 | } |
535 | ||
762a763b | 536 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
537 | temp = pmtlen + out + 2; |
538 | if (temp >= line_size) | |
539 | { | |
540 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
541 | visible_line = (char *)xrealloc (visible_line, line_size); |
542 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 543 | } |
726f6388 JA |
544 | strncpy (line + out, prompt_this_line, pmtlen); |
545 | out += pmtlen; | |
546 | line[out] = '\0'; | |
28ef6c31 | 547 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
548 | } |
549 | ||
bb70624e JA |
550 | #define CHECK_INV_LBREAKS() \ |
551 | do { \ | |
552 | if (newlines >= (inv_lbsize - 2)) \ | |
553 | { \ | |
554 | inv_lbsize *= 2; \ | |
555 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
556 | } \ | |
557 | } while (0) | |
7117c2d2 JA |
558 | |
559 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
560 | #define CHECK_LPOS() \ |
561 | do { \ | |
b72432fd | 562 | lpos++; \ |
28ef6c31 | 563 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 564 | { \ |
bb70624e JA |
565 | if (newlines >= (inv_lbsize - 2)) \ |
566 | { \ | |
567 | inv_lbsize *= 2; \ | |
568 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
7117c2d2 | 569 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
bb70624e | 570 | } \ |
b72432fd | 571 | inv_lbreaks[++newlines] = out; \ |
7117c2d2 | 572 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
b72432fd JA |
573 | lpos = 0; \ |
574 | } \ | |
ccc6cda3 | 575 | } while (0) |
7117c2d2 JA |
576 | #else |
577 | #define CHECK_LPOS() \ | |
578 | do { \ | |
579 | lpos++; \ | |
580 | if (lpos >= _rl_screenwidth) \ | |
581 | { \ | |
582 | if (newlines >= (inv_lbsize - 2)) \ | |
583 | { \ | |
584 | inv_lbsize *= 2; \ | |
585 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
586 | } \ | |
587 | inv_lbreaks[++newlines] = out; \ | |
588 | lpos = 0; \ | |
589 | } \ | |
590 | } while (0) | |
591 | #endif | |
ccc6cda3 JA |
592 | |
593 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
594 | inv_lbreaks[newlines = 0] = 0; | |
43cdcad8 | 595 | #if 0 |
d166f048 | 596 | lpos = out - wrap_offset; |
43cdcad8 CR |
597 | #else |
598 | lpos = prompt_physical_chars + modmark; | |
599 | #endif | |
600 | ||
7117c2d2 JA |
601 | #if defined (HANDLE_MULTIBYTE) |
602 | memset (_rl_wrapped_line, 0, vis_lbsize); | |
37c41ab1 | 603 | num = 0; |
7117c2d2 | 604 | #endif |
d166f048 | 605 | |
28ef6c31 JA |
606 | /* prompt_invis_chars_first_line is the number of invisible characters in |
607 | the first physical line of the prompt. | |
608 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
609 | chars on the second line. */ | |
610 | ||
611 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 612 | contents of the command line? */ |
28ef6c31 | 613 | while (lpos >= _rl_screenwidth) |
d166f048 | 614 | { |
28ef6c31 JA |
615 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
616 | invisible characters that is longer than the screen width. The | |
617 | prompt_invis_chars_first_line variable could be made into an array | |
618 | saying how many invisible characters there are per line, but that's | |
619 | probably too much work for the benefit gained. How many people have | |
545f34cf CR |
620 | prompts that exceed two physical lines? |
621 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
37c41ab1 CR |
622 | #if defined (HANDLE_MULTIBYTE) |
623 | n0 = num; | |
624 | temp = local_prompt ? strlen (local_prompt) : 0; | |
625 | while (num < temp) | |
626 | { | |
627 | if (_rl_col_width (local_prompt, n0, num) > _rl_screenwidth) | |
628 | { | |
629 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
630 | break; | |
631 | } | |
632 | num++; | |
633 | } | |
634 | temp = num + | |
635 | #else | |
28ef6c31 | 636 | temp = ((newlines + 1) * _rl_screenwidth) + |
37c41ab1 | 637 | #endif /* !HANDLE_MULTIBYTE */ |
545f34cf CR |
638 | ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line |
639 | : ((newlines == 1) ? wrap_offset : 0)) | |
640 | : ((newlines == 0) ? wrap_offset :0)); | |
641 | ||
d166f048 | 642 | inv_lbreaks[++newlines] = temp; |
37c41ab1 CR |
643 | #if defined (HANDLE_MULTIBYTE) |
644 | lpos -= _rl_col_width (local_prompt, n0, num); | |
645 | #else | |
28ef6c31 | 646 | lpos -= _rl_screenwidth; |
37c41ab1 | 647 | #endif |
d166f048 | 648 | } |
ccc6cda3 | 649 | |
28ef6c31 JA |
650 | prompt_last_screen_line = newlines; |
651 | ||
652 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
653 | track of where the cursor is (c_pos), the number of the line containing | |
654 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). | |
655 | It maintains an array of line breaks for display (inv_lbreaks). | |
656 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 657 | lb_linenum = 0; |
7117c2d2 JA |
658 | #if defined (HANDLE_MULTIBYTE) |
659 | in = 0; | |
660 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
661 | { | |
662 | memset (&ps, 0, sizeof (mbstate_t)); | |
663 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
664 | } | |
665 | else | |
666 | wc_bytes = 1; | |
667 | while (in < rl_end) | |
668 | #else | |
d166f048 | 669 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 670 | #endif |
726f6388 JA |
671 | { |
672 | c = (unsigned char)rl_line_buffer[in]; | |
673 | ||
7117c2d2 JA |
674 | #if defined (HANDLE_MULTIBYTE) |
675 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
676 | { | |
d3a24ed2 | 677 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
678 | { |
679 | /* Byte sequence is invalid or shortened. Assume that the | |
680 | first byte represents a character. */ | |
681 | wc_bytes = 1; | |
682 | /* Assume that a character occupies a single column. */ | |
683 | wc_width = 1; | |
684 | memset (&ps, 0, sizeof (mbstate_t)); | |
685 | } | |
d3a24ed2 | 686 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
687 | break; /* Found '\0' */ |
688 | else | |
689 | { | |
690 | temp = wcwidth (wc); | |
d3a24ed2 | 691 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
692 | } |
693 | } | |
694 | #endif | |
695 | ||
726f6388 JA |
696 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
697 | { | |
698 | line_size *= 2; | |
f73dda09 JA |
699 | visible_line = (char *)xrealloc (visible_line, line_size); |
700 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
701 | line = invisible_line; |
702 | } | |
703 | ||
704 | if (in == rl_point) | |
ccc6cda3 JA |
705 | { |
706 | c_pos = out; | |
707 | lb_linenum = newlines; | |
708 | } | |
726f6388 | 709 | |
7117c2d2 JA |
710 | #if defined (HANDLE_MULTIBYTE) |
711 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
712 | #else | |
726f6388 | 713 | if (META_CHAR (c)) |
7117c2d2 | 714 | #endif |
726f6388 JA |
715 | { |
716 | if (_rl_output_meta_chars == 0) | |
717 | { | |
718 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 719 | |
28ef6c31 | 720 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 721 | { |
28ef6c31 | 722 | temp = _rl_screenwidth - lpos; |
bb70624e | 723 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
724 | inv_lbreaks[++newlines] = out + temp; |
725 | lpos = 4 - temp; | |
726 | } | |
727 | else | |
728 | lpos += 4; | |
729 | ||
726f6388 JA |
730 | out += 4; |
731 | } | |
732 | else | |
ccc6cda3 JA |
733 | { |
734 | line[out++] = c; | |
735 | CHECK_LPOS(); | |
736 | } | |
726f6388 JA |
737 | } |
738 | #if defined (DISPLAY_TABS) | |
739 | else if (c == '\t') | |
740 | { | |
28ef6c31 | 741 | register int newout; |
b72432fd JA |
742 | |
743 | #if 0 | |
ccc6cda3 | 744 | newout = (out | (int)7) + 1; |
b72432fd JA |
745 | #else |
746 | newout = out + 8 - lpos % 8; | |
747 | #endif | |
ccc6cda3 | 748 | temp = newout - out; |
28ef6c31 | 749 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
750 | { |
751 | register int temp2; | |
28ef6c31 | 752 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 753 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
754 | inv_lbreaks[++newlines] = out + temp2; |
755 | lpos = temp - temp2; | |
756 | while (out < newout) | |
757 | line[out++] = ' '; | |
758 | } | |
759 | else | |
760 | { | |
761 | while (out < newout) | |
762 | line[out++] = ' '; | |
763 | lpos += temp; | |
764 | } | |
726f6388 JA |
765 | } |
766 | #endif | |
28ef6c31 | 767 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
768 | { |
769 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 770 | CHECK_INV_LBREAKS (); |
b72432fd JA |
771 | inv_lbreaks[++newlines] = out; |
772 | lpos = 0; | |
773 | } | |
ccc6cda3 | 774 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
775 | { |
776 | line[out++] = '^'; | |
ccc6cda3 JA |
777 | CHECK_LPOS(); |
778 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
779 | CHECK_LPOS(); | |
726f6388 | 780 | } |
ccc6cda3 | 781 | else |
726f6388 | 782 | { |
7117c2d2 JA |
783 | #if defined (HANDLE_MULTIBYTE) |
784 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
785 | { | |
786 | register int i; | |
787 | ||
788 | _rl_wrapped_multicolumn = 0; | |
789 | ||
790 | if (_rl_screenwidth < lpos + wc_width) | |
791 | for (i = lpos; i < _rl_screenwidth; i++) | |
792 | { | |
793 | /* The space will be removed in update_line() */ | |
794 | line[out++] = ' '; | |
795 | _rl_wrapped_multicolumn++; | |
796 | CHECK_LPOS(); | |
797 | } | |
798 | if (in == rl_point) | |
799 | { | |
800 | c_pos = out; | |
801 | lb_linenum = newlines; | |
802 | } | |
803 | for (i = in; i < in+wc_bytes; i++) | |
804 | line[out++] = rl_line_buffer[i]; | |
805 | for (i = 0; i < wc_width; i++) | |
806 | CHECK_LPOS(); | |
807 | } | |
808 | else | |
809 | { | |
810 | line[out++] = c; | |
811 | CHECK_LPOS(); | |
812 | } | |
813 | #else | |
ccc6cda3 JA |
814 | line[out++] = c; |
815 | CHECK_LPOS(); | |
7117c2d2 JA |
816 | #endif |
817 | } | |
818 | ||
819 | #if defined (HANDLE_MULTIBYTE) | |
820 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
821 | { | |
822 | in += wc_bytes; | |
823 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
726f6388 | 824 | } |
7117c2d2 JA |
825 | else |
826 | in++; | |
827 | #endif | |
828 | ||
726f6388 JA |
829 | } |
830 | line[out] = '\0'; | |
831 | if (c_pos < 0) | |
ccc6cda3 JA |
832 | { |
833 | c_pos = out; | |
834 | lb_linenum = newlines; | |
835 | } | |
836 | ||
837 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 838 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
839 | inv_lbreaks[newlines+1] = out; |
840 | cursor_linenum = lb_linenum; | |
726f6388 | 841 | |
28ef6c31 JA |
842 | /* C_POS == position in buffer where cursor should be placed. |
843 | CURSOR_LINENUM == line number where the cursor should be placed. */ | |
726f6388 JA |
844 | |
845 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
846 | line buffers are really multiple lines, which would wrap every | |
847 | (screenwidth - 1) characters. Go through each in turn, finding | |
848 | the changed region and updating it. The line order is top to bottom. */ | |
849 | ||
850 | /* If we can move the cursor up and down, then use multiple lines, | |
851 | otherwise, let long lines display in a single terminal line, and | |
852 | horizontally scroll it. */ | |
853 | ||
28ef6c31 | 854 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 855 | { |
177d51f7 | 856 | int nleft, pos, changed_screen_line, tx; |
726f6388 JA |
857 | |
858 | if (!rl_display_fixed || forced_display) | |
859 | { | |
860 | forced_display = 0; | |
861 | ||
862 | /* If we have more than a screenful of material to display, then | |
863 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 864 | not the first. */ |
28ef6c31 | 865 | if (out >= _rl_screenchars) |
7117c2d2 JA |
866 | { |
867 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
868 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
869 | else | |
870 | out = _rl_screenchars - 1; | |
871 | } | |
726f6388 JA |
872 | |
873 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
874 | second and subsequent lines start at inv_lbreaks[N], offset by |
875 | OFFSET (which has already been calculated above). */ | |
726f6388 JA |
876 | |
877 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
ccc6cda3 JA |
878 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
879 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
880 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 881 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 882 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 JA |
883 | |
884 | /* For each line in the buffer, do the updating display. */ | |
885 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
886 | { | |
887 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, | |
ccc6cda3 | 888 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 JA |
889 | |
890 | /* If this is the line with the prompt, we might need to | |
891 | compensate for invisible characters in the new line. Do | |
892 | this only if there is not more than one new line (which | |
893 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
894 | and the new line is shorter than the old. Make sure we are |
895 | at the end of the new line before clearing. */ | |
726f6388 | 896 | if (linenum == 0 && |
ccc6cda3 | 897 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
898 | (wrap_offset > visible_wrap_offset) && |
899 | (_rl_last_c_pos < visible_first_line_len)) | |
900 | { | |
177d51f7 CR |
901 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
902 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
903 | else | |
904 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
726f6388 | 905 | if (nleft) |
d166f048 | 906 | _rl_clear_to_eol (nleft); |
726f6388 JA |
907 | } |
908 | ||
909 | /* Since the new first line is now visible, save its length. */ | |
910 | if (linenum == 0) | |
ccc6cda3 | 911 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
912 | } |
913 | ||
914 | /* We may have deleted some lines. If so, clear the left over | |
915 | blank ones at the bottom out. */ | |
916 | if (_rl_vis_botlin > inv_botlin) | |
917 | { | |
918 | char *tt; | |
919 | for (; linenum <= _rl_vis_botlin; linenum++) | |
920 | { | |
921 | tt = VIS_CHARS (linenum); | |
922 | _rl_move_vert (linenum); | |
923 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 924 | _rl_clear_to_eol |
28ef6c31 | 925 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
926 | } |
927 | } | |
928 | _rl_vis_botlin = inv_botlin; | |
929 | ||
726f6388 JA |
930 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
931 | different screen line during this redisplay. */ | |
932 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
933 | if (changed_screen_line) | |
934 | { | |
935 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 936 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
937 | the physical cursor position on the screen stays the same, |
938 | but the buffer position needs to be adjusted to account | |
939 | for invisible characters. */ | |
177d51f7 | 940 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
b72432fd | 941 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
942 | } |
943 | ||
944 | /* We have to reprint the prompt if it contains invisible | |
945 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
946 | the characters from the current cursor position. But we |
947 | only need to reprint it if the cursor is before the last | |
948 | invisible character in the prompt string. */ | |
28ef6c31 | 949 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 950 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
28ef6c31 | 951 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
726f6388 | 952 | { |
bb70624e JA |
953 | #if defined (__MSDOS__) |
954 | putc ('\r', rl_outstream); | |
955 | #else | |
28ef6c31 JA |
956 | if (_rl_term_cr) |
957 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 958 | #endif |
726f6388 | 959 | _rl_output_some_chars (local_prompt, nleft); |
7117c2d2 | 960 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5e13499c | 961 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft); |
7117c2d2 JA |
962 | else |
963 | _rl_last_c_pos = nleft; | |
726f6388 JA |
964 | } |
965 | ||
966 | /* Where on that line? And where does that line start | |
967 | in the buffer? */ | |
ccc6cda3 | 968 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 JA |
969 | /* nleft == number of characters in the line buffer between the |
970 | start of the line and the cursor position. */ | |
971 | nleft = c_pos - pos; | |
972 | ||
ccc6cda3 | 973 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 974 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 975 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
976 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
977 | { | |
7117c2d2 | 978 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
177d51f7 | 979 | tx = _rl_col_width (&visible_line[pos], 0, nleft); |
7117c2d2 | 980 | else |
177d51f7 | 981 | tx = nleft; |
d11b8b46 CR |
982 | if (_rl_last_c_pos != tx) |
983 | { | |
984 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ | |
985 | _rl_last_c_pos = tx; | |
986 | } | |
726f6388 JA |
987 | } |
988 | ||
7117c2d2 JA |
989 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
990 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
991 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
992 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
993 | } | |
994 | } | |
995 | else /* Do horizontal scrolling. */ | |
996 | { | |
997 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
998 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
999 | ||
1000 | /* Always at top line. */ | |
1001 | _rl_last_v_pos = 0; | |
1002 | ||
1003 | /* Compute where in the buffer the displayed line should start. This | |
1004 | will be LMARGIN. */ | |
1005 | ||
1006 | /* The number of characters that will be displayed before the cursor. */ | |
1007 | ndisp = c_pos - wrap_offset; | |
28ef6c31 | 1008 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1009 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 1010 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
726f6388 | 1011 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 1012 | t = _rl_screenwidth / 3; |
726f6388 JA |
1013 | |
1014 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 1015 | last_lmargin will be > 0. */ |
726f6388 JA |
1016 | |
1017 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
1018 | width, compute the starting offset so that the cursor is about |
1019 | two-thirds of the way across the screen. */ | |
28ef6c31 | 1020 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 JA |
1021 | { |
1022 | lmargin = c_pos - (2 * t); | |
1023 | if (lmargin < 0) | |
1024 | lmargin = 0; | |
1025 | /* If the left margin would be in the middle of a prompt with | |
1026 | invisible characters, don't display the prompt at all. */ | |
1027 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1028 | lmargin = nleft; | |
1029 | } | |
28ef6c31 | 1030 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1031 | lmargin = 0; |
726f6388 JA |
1032 | else if (phys_c_pos < 1) |
1033 | { | |
1034 | /* If we are moving back towards the beginning of the line and | |
1035 | the last margin is no longer correct, compute a new one. */ | |
1036 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ | |
1037 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1038 | lmargin = nleft; | |
1039 | } | |
1040 | else | |
b72432fd | 1041 | lmargin = last_lmargin; |
726f6388 JA |
1042 | |
1043 | /* If the first character on the screen isn't the first character | |
1044 | in the display line, indicate this with a special character. */ | |
1045 | if (lmargin > 0) | |
1046 | line[lmargin] = '<'; | |
1047 | ||
1048 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1049 | the whole line, indicate that with a special character at the |
1050 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1051 | wrap offset into account. */ | |
28ef6c31 | 1052 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1053 | if (t < out) |
b72432fd | 1054 | line[t - 1] = '>'; |
726f6388 JA |
1055 | |
1056 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
1057 | { | |
1058 | forced_display = 0; | |
1059 | update_line (&visible_line[last_lmargin], | |
1060 | &invisible_line[lmargin], | |
1061 | 0, | |
28ef6c31 JA |
1062 | _rl_screenwidth + visible_wrap_offset, |
1063 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1064 | 0); |
1065 | ||
1066 | /* If the visible new line is shorter than the old, but the number | |
1067 | of invisible characters is greater, and we are at the end of | |
1068 | the new line, we need to clear to eol. */ | |
1069 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1070 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1071 | (_rl_last_c_pos == out) && | |
1072 | t < visible_first_line_len) | |
1073 | { | |
28ef6c31 | 1074 | nleft = _rl_screenwidth - t; |
d166f048 | 1075 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1076 | } |
1077 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1078 | if (visible_first_line_len > _rl_screenwidth) |
1079 | visible_first_line_len = _rl_screenwidth; | |
726f6388 JA |
1080 | |
1081 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); | |
1082 | last_lmargin = lmargin; | |
1083 | } | |
1084 | } | |
1085 | fflush (rl_outstream); | |
1086 | ||
1087 | /* Swap visible and non-visible lines. */ | |
1088 | { | |
28ef6c31 | 1089 | char *vtemp = visible_line; |
bb70624e JA |
1090 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
1091 | ||
726f6388 | 1092 | visible_line = invisible_line; |
28ef6c31 | 1093 | invisible_line = vtemp; |
bb70624e | 1094 | |
ccc6cda3 JA |
1095 | vis_lbreaks = inv_lbreaks; |
1096 | inv_lbreaks = itemp; | |
bb70624e JA |
1097 | |
1098 | vis_lbsize = inv_lbsize; | |
1099 | inv_lbsize = ntemp; | |
1100 | ||
726f6388 JA |
1101 | rl_display_fixed = 0; |
1102 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1103 | are not displaying any invisible characters, so set visible_wrap_offset | |
1104 | to 0. */ | |
1105 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1106 | visible_wrap_offset = 0; | |
1107 | else | |
1108 | visible_wrap_offset = wrap_offset; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | /* PWP: update_line() is based on finding the middle difference of each | |
1113 | line on the screen; vis: | |
1114 | ||
1115 | /old first difference | |
1116 | /beginning of line | /old last same /old EOL | |
1117 | v v v v | |
1118 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1119 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1120 | ^ ^ ^ ^ | |
1121 | \beginning of line | \new last same \new end of line | |
1122 | \new first difference | |
1123 | ||
1124 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1125 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1126 | |
1127 | Could be made even smarter, but this works well enough */ | |
1128 | static void | |
1129 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1130 | register char *old, *new; | |
ccc6cda3 | 1131 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1132 | { |
1133 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
1134 | int temp, lendiff, wsatend, od, nd; | |
ccc6cda3 | 1135 | int current_invis_chars; |
7117c2d2 JA |
1136 | int col_lendiff, col_temp; |
1137 | #if defined (HANDLE_MULTIBYTE) | |
1138 | mbstate_t ps_new, ps_old; | |
1139 | int new_offset, old_offset, tmp; | |
1140 | #endif | |
726f6388 JA |
1141 | |
1142 | /* If we're at the right edge of a terminal that supports xn, we're | |
1143 | ready to wrap around, so do so. This fixes problems with knowing | |
1144 | the exact cursor position and cut-and-paste with certain terminal | |
1145 | emulators. In this calculation, TEMP is the physical screen | |
1146 | position of the cursor. */ | |
177d51f7 CR |
1147 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1148 | temp = _rl_last_c_pos; | |
1149 | else | |
1150 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
28ef6c31 | 1151 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1152 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1153 | { |
7117c2d2 JA |
1154 | #if defined (HANDLE_MULTIBYTE) |
1155 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1156 | { | |
1157 | wchar_t wc; | |
1158 | mbstate_t ps; | |
1159 | int tempwidth, bytes; | |
1160 | size_t ret; | |
1161 | ||
1162 | /* This fixes only double-column characters, but if the wrapped | |
1163 | character comsumes more than three columns, spaces will be | |
1164 | inserted in the string buffer. */ | |
1165 | if (_rl_wrapped_line[current_line] > 0) | |
1166 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); | |
1167 | ||
1168 | memset (&ps, 0, sizeof (mbstate_t)); | |
1169 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
d3a24ed2 | 1170 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1171 | { |
1172 | tempwidth = 1; | |
1173 | ret = 1; | |
1174 | } | |
d3a24ed2 | 1175 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1176 | tempwidth = 0; |
1177 | else | |
1178 | tempwidth = wcwidth (wc); | |
1179 | ||
1180 | if (tempwidth > 0) | |
1181 | { | |
1182 | int count; | |
1183 | bytes = ret; | |
1184 | for (count = 0; count < bytes; count++) | |
1185 | putc (new[count], rl_outstream); | |
1186 | _rl_last_c_pos = tempwidth; | |
1187 | _rl_last_v_pos++; | |
1188 | memset (&ps, 0, sizeof (mbstate_t)); | |
1189 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1190 | if (ret != 0 && bytes != 0) | |
1191 | { | |
d3a24ed2 | 1192 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1193 | memmove (old+bytes, old+1, strlen (old+1)); |
1194 | else | |
1195 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1196 | memcpy (old, new, bytes); | |
1197 | } | |
1198 | } | |
1199 | else | |
1200 | { | |
1201 | putc (' ', rl_outstream); | |
1202 | _rl_last_c_pos = 1; | |
1203 | _rl_last_v_pos++; | |
1204 | if (old[0] && new[0]) | |
1205 | old[0] = new[0]; | |
1206 | } | |
1207 | } | |
726f6388 | 1208 | else |
7117c2d2 JA |
1209 | #endif |
1210 | { | |
1211 | if (new[0]) | |
1212 | putc (new[0], rl_outstream); | |
1213 | else | |
1214 | putc (' ', rl_outstream); | |
1215 | _rl_last_c_pos = 1; /* XXX */ | |
1216 | _rl_last_v_pos++; | |
1217 | if (old[0] && new[0]) | |
1218 | old[0] = new[0]; | |
1219 | } | |
726f6388 | 1220 | } |
7117c2d2 | 1221 | |
726f6388 JA |
1222 | |
1223 | /* Find first difference. */ | |
7117c2d2 JA |
1224 | #if defined (HANDLE_MULTIBYTE) |
1225 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1226 | { | |
5e13499c CR |
1227 | /* See if the old line is a subset of the new line, so that the |
1228 | only change is adding characters. */ | |
1229 | temp = (omax < nmax) ? omax : nmax; | |
1230 | if (memcmp (old, new, temp) == 0) | |
7117c2d2 | 1231 | { |
5e13499c CR |
1232 | ofd = old + temp; |
1233 | nfd = new + temp; | |
d3a24ed2 CR |
1234 | } |
1235 | else | |
5e13499c CR |
1236 | { |
1237 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1238 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1239 | ||
1240 | if (omax == nmax && STREQN (new, old, omax)) | |
d3a24ed2 | 1241 | { |
5e13499c CR |
1242 | ofd = old + omax; |
1243 | nfd = new + nmax; | |
1244 | } | |
1245 | else | |
1246 | { | |
1247 | new_offset = old_offset = 0; | |
1248 | for (ofd = old, nfd = new; | |
1249 | (ofd - old < omax) && *ofd && | |
1250 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1251 | { | |
1252 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1253 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1254 | ofd = old + old_offset; | |
1255 | nfd = new + new_offset; | |
1256 | } | |
d3a24ed2 | 1257 | } |
7117c2d2 JA |
1258 | } |
1259 | } | |
1260 | else | |
1261 | #endif | |
726f6388 JA |
1262 | for (ofd = old, nfd = new; |
1263 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1264 | ofd++, nfd++) | |
1265 | ; | |
1266 | ||
1267 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1268 | of the distance between ne and new and oe and old, respectively, to | |
1269 | move a subtraction out of each loop. */ | |
1270 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1271 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1272 | ||
1273 | /* If no difference, continue to next line. */ | |
1274 | if (ofd == oe && nfd == ne) | |
1275 | return; | |
1276 | ||
1277 | wsatend = 1; /* flag for trailing whitespace */ | |
7117c2d2 JA |
1278 | |
1279 | #if defined (HANDLE_MULTIBYTE) | |
1280 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1281 | { | |
1282 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1283 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1284 | while ((ols > ofd) && (nls > nfd)) | |
1285 | { | |
1286 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1287 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1288 | ||
d3a24ed2 CR |
1289 | #if 0 |
1290 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1291 | _rl_adjust_point (old, ols - old, &ps_old); |
1292 | _rl_adjust_point (new, nls - new, &ps_new); | |
d3a24ed2 | 1293 | #endif |
7117c2d2 JA |
1294 | |
1295 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1296 | break; | |
1297 | ||
1298 | if (*ols == ' ') | |
1299 | wsatend = 0; | |
1300 | ||
1301 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1302 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1303 | } | |
1304 | } | |
1305 | else | |
1306 | { | |
1307 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1308 | ols = oe - 1; /* find last same */ |
1309 | nls = ne - 1; | |
1310 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1311 | { | |
1312 | if (*ols != ' ') | |
1313 | wsatend = 0; | |
1314 | ols--; | |
1315 | nls--; | |
1316 | } | |
7117c2d2 JA |
1317 | #if defined (HANDLE_MULTIBYTE) |
1318 | } | |
1319 | #endif | |
726f6388 JA |
1320 | |
1321 | if (wsatend) | |
1322 | { | |
1323 | ols = oe; | |
1324 | nls = ne; | |
1325 | } | |
7117c2d2 JA |
1326 | #if defined (HANDLE_MULTIBYTE) |
1327 | /* This may not work for stateful encoding, but who cares? To handle | |
1328 | stateful encoding properly, we have to scan each string from the | |
1329 | beginning and compare. */ | |
1330 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1331 | #else | |
726f6388 | 1332 | else if (*ols != *nls) |
7117c2d2 | 1333 | #endif |
726f6388 JA |
1334 | { |
1335 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 JA |
1336 | { |
1337 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1338 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1339 | else | |
1340 | ols++; | |
1341 | } | |
726f6388 | 1342 | if (*nls) |
7117c2d2 JA |
1343 | { |
1344 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1345 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1346 | else | |
1347 | nls++; | |
1348 | } | |
726f6388 JA |
1349 | } |
1350 | ||
ccc6cda3 JA |
1351 | /* count of invisible characters in the current invisible line. */ |
1352 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1353 | if (_rl_last_v_pos != current_line) | |
1354 | { | |
1355 | _rl_move_vert (current_line); | |
177d51f7 | 1356 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
ccc6cda3 JA |
1357 | _rl_last_c_pos += visible_wrap_offset; |
1358 | } | |
726f6388 JA |
1359 | |
1360 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1361 | prompt string, and the prompt string has not changed, and the current |
1362 | cursor position is before the last invisible character in the prompt, | |
1363 | and the index of the character to move to is past the end of the prompt | |
1364 | string, then redraw the entire prompt string. We can only do this | |
1365 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1366 | |
ccc6cda3 JA |
1367 | This is not an efficiency hack -- there is a problem with redrawing |
1368 | portions of the prompt string if they contain terminal escape | |
1369 | sequences (like drawing the `unbold' sequence without a corresponding | |
1370 | `bold') that manifests itself on certain terminals. */ | |
726f6388 JA |
1371 | |
1372 | lendiff = local_prompt ? strlen (local_prompt) : 0; | |
ccc6cda3 | 1373 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 1374 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 JA |
1375 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
1376 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) | |
726f6388 | 1377 | { |
bb70624e JA |
1378 | #if defined (__MSDOS__) |
1379 | putc ('\r', rl_outstream); | |
1380 | #else | |
28ef6c31 | 1381 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1382 | #endif |
726f6388 | 1383 | _rl_output_some_chars (local_prompt, lendiff); |
7117c2d2 JA |
1384 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1385 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff); | |
1386 | else | |
1387 | _rl_last_c_pos = lendiff; | |
726f6388 JA |
1388 | } |
1389 | ||
ccc6cda3 | 1390 | _rl_move_cursor_relative (od, old); |
726f6388 | 1391 | |
7117c2d2 JA |
1392 | /* if (len (new) > len (old)) |
1393 | lendiff == difference in buffer | |
1394 | col_lendiff == difference on screen | |
1395 | When not using multibyte characters, these are equal */ | |
726f6388 | 1396 | lendiff = (nls - nfd) - (ols - ofd); |
7117c2d2 JA |
1397 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1398 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1399 | else | |
1400 | col_lendiff = lendiff; | |
726f6388 | 1401 | |
ccc6cda3 JA |
1402 | /* If we are changing the number of invisible characters in a line, and |
1403 | the spot of first difference is before the end of the invisible chars, | |
1404 | lendiff needs to be adjusted. */ | |
1405 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1406 | current_invis_chars != visible_wrap_offset) | |
7117c2d2 JA |
1407 | { |
1408 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1409 | { | |
1410 | lendiff += visible_wrap_offset - current_invis_chars; | |
1411 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1412 | } | |
1413 | else | |
1414 | { | |
1415 | lendiff += visible_wrap_offset - current_invis_chars; | |
1416 | col_lendiff = lendiff; | |
1417 | } | |
1418 | } | |
ccc6cda3 | 1419 | |
726f6388 JA |
1420 | /* Insert (diff (len (old), len (new)) ch. */ |
1421 | temp = ne - nfd; | |
7117c2d2 JA |
1422 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1423 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1424 | else | |
1425 | col_temp = temp; | |
1426 | ||
1427 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
726f6388 JA |
1428 | { |
1429 | /* Non-zero if we're increasing the number of lines. */ | |
1430 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1431 | /* Sometimes it is cheaper to print the characters rather than | |
1432 | use the terminal's capabilities. If we're growing the number | |
1433 | of lines, make sure we actually cause the new line to wrap | |
1434 | around on auto-wrapping terminals. */ | |
7117c2d2 | 1435 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1436 | { |
28ef6c31 | 1437 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1438 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1439 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 JA |
1440 | invisible characters. We need to just draw them. */ |
1441 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
28ef6c31 | 1442 | lendiff <= prompt_visible_length || !current_invis_chars)) |
726f6388 | 1443 | { |
7117c2d2 JA |
1444 | insert_some_chars (nfd, lendiff, col_lendiff); |
1445 | _rl_last_c_pos += col_lendiff; | |
726f6388 | 1446 | } |
d90269dd | 1447 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
726f6388 JA |
1448 | { |
1449 | /* At the end of a line the characters do not have to | |
1450 | be "inserted". They can just be placed on the screen. */ | |
ccc6cda3 | 1451 | /* However, this screws up the rest of this block, which |
b72432fd | 1452 | assumes you've done the insert because you can. */ |
726f6388 | 1453 | _rl_output_some_chars (nfd, lendiff); |
7117c2d2 | 1454 | _rl_last_c_pos += col_lendiff; |
726f6388 | 1455 | } |
ccc6cda3 JA |
1456 | else |
1457 | { | |
1458 | /* We have horizontal scrolling and we are not inserting at | |
1459 | the end. We have invisible characters in this line. This | |
1460 | is a dumb update. */ | |
1461 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1462 | _rl_last_c_pos += col_temp; |
ccc6cda3 JA |
1463 | return; |
1464 | } | |
726f6388 JA |
1465 | /* Copy (new) chars to screen from first diff to last match. */ |
1466 | temp = nls - nfd; | |
1467 | if ((temp - lendiff) > 0) | |
1468 | { | |
1469 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
5e13499c CR |
1470 | #if 1 |
1471 | /* XXX -- this bears closer inspection. Fixes a redisplay bug | |
1472 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1473 | multibyte characters and prompt strings with invisible | |
1474 | characters, but was previously disabled. */ | |
7117c2d2 | 1475 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); |
d3a24ed2 CR |
1476 | #else |
1477 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff); | |
7117c2d2 | 1478 | #endif |
726f6388 JA |
1479 | } |
1480 | } | |
1481 | else | |
1482 | { | |
1483 | /* cannot insert chars, write to EOL */ | |
1484 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1485 | _rl_last_c_pos += col_temp; |
726f6388 JA |
1486 | } |
1487 | } | |
1488 | else /* Delete characters from line. */ | |
1489 | { | |
1490 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1491 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1492 | { |
1493 | /* If all we're doing is erasing the invisible characters in the | |
1494 | prompt string, don't bother. It screws up the assumptions | |
1495 | about what's on the screen. */ | |
1496 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1497 | -lendiff == visible_wrap_offset) | |
7117c2d2 | 1498 | col_lendiff = 0; |
726f6388 | 1499 | |
7117c2d2 JA |
1500 | if (col_lendiff) |
1501 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 JA |
1502 | |
1503 | /* Copy (new) chars to screen from first diff to last match */ | |
1504 | temp = nls - nfd; | |
1505 | if (temp > 0) | |
1506 | { | |
1507 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1508 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp);; |
726f6388 JA |
1509 | } |
1510 | } | |
1511 | /* Otherwise, print over the existing material. */ | |
1512 | else | |
1513 | { | |
1514 | if (temp > 0) | |
1515 | { | |
1516 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1517 | _rl_last_c_pos += col_temp; |
726f6388 JA |
1518 | } |
1519 | lendiff = (oe - old) - (ne - new); | |
7117c2d2 JA |
1520 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1521 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1522 | else | |
1523 | col_lendiff = lendiff; | |
1524 | ||
1525 | if (col_lendiff) | |
b72432fd JA |
1526 | { |
1527 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 1528 | space_to_eol (col_lendiff); |
b72432fd | 1529 | else |
7117c2d2 | 1530 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 1531 | } |
726f6388 JA |
1532 | } |
1533 | } | |
1534 | } | |
1535 | ||
1536 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1537 | int |
726f6388 JA |
1538 | rl_on_new_line () |
1539 | { | |
1540 | if (visible_line) | |
1541 | visible_line[0] = '\0'; | |
1542 | ||
1543 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1544 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1545 | if (vis_lbreaks) |
1546 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1547 | visible_wrap_offset = 0; | |
726f6388 JA |
1548 | return 0; |
1549 | } | |
1550 | ||
bb70624e JA |
1551 | /* Tell the update routines that we have moved onto a new line with the |
1552 | prompt already displayed. Code originally from the version of readline | |
61deeb13 CR |
1553 | distributed with CLISP. rl_expand_prompt must have already been called |
1554 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
1555 | int |
1556 | rl_on_new_line_with_prompt () | |
1557 | { | |
1558 | int prompt_size, i, l, real_screenwidth, newlines; | |
61deeb13 | 1559 | char *prompt_last_line, *lprompt; |
bb70624e JA |
1560 | |
1561 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1562 | the already-displayed prompt. */ | |
1563 | prompt_size = strlen (rl_prompt) + 1; | |
1564 | init_line_structures (prompt_size); | |
1565 | ||
1566 | /* Make sure the line structures hold the already-displayed prompt for | |
1567 | redisplay. */ | |
61deeb13 CR |
1568 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1569 | strcpy (visible_line, lprompt); | |
1570 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
1571 | |
1572 | /* If the prompt contains newlines, take the last tail. */ | |
1573 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1574 | if (!prompt_last_line) | |
1575 | prompt_last_line = rl_prompt; | |
1576 | ||
1577 | l = strlen (prompt_last_line); | |
7117c2d2 JA |
1578 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1579 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); | |
1580 | else | |
1581 | _rl_last_c_pos = l; | |
bb70624e JA |
1582 | |
1583 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1584 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1585 | one less, see terminal.c. */ | |
28ef6c31 | 1586 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1587 | _rl_last_v_pos = l / real_screenwidth; |
1588 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1589 | whether the cursor is at the end of the last line, or already at the | |
1590 | beginning of the next line. Output a newline just to be safe. */ | |
1591 | if (l > 0 && (l % real_screenwidth) == 0) | |
1592 | _rl_output_some_chars ("\n", 1); | |
1593 | last_lmargin = 0; | |
1594 | ||
1595 | newlines = 0; i = 0; | |
1596 | while (i <= l) | |
1597 | { | |
1598 | _rl_vis_botlin = newlines; | |
1599 | vis_lbreaks[newlines++] = i; | |
1600 | i += real_screenwidth; | |
1601 | } | |
1602 | vis_lbreaks[newlines] = l; | |
1603 | visible_wrap_offset = 0; | |
1604 | ||
61deeb13 CR |
1605 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1606 | ||
bb70624e JA |
1607 | return 0; |
1608 | } | |
1609 | ||
726f6388 | 1610 | /* Actually update the display, period. */ |
ccc6cda3 | 1611 | int |
726f6388 JA |
1612 | rl_forced_update_display () |
1613 | { | |
1614 | if (visible_line) | |
1615 | { | |
1616 | register char *temp = visible_line; | |
1617 | ||
ccc6cda3 | 1618 | while (*temp) |
b72432fd | 1619 | *temp++ = '\0'; |
726f6388 JA |
1620 | } |
1621 | rl_on_new_line (); | |
1622 | forced_display++; | |
ccc6cda3 | 1623 | (*rl_redisplay_function) (); |
726f6388 JA |
1624 | return 0; |
1625 | } | |
1626 | ||
1627 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
1628 | DATA is the contents of the screen line of interest; i.e., where | |
1629 | the movement is being done. */ | |
1630 | void | |
1631 | _rl_move_cursor_relative (new, data) | |
1632 | int new; | |
28ef6c31 | 1633 | const char *data; |
726f6388 JA |
1634 | { |
1635 | register int i; | |
1636 | ||
1637 | /* If we don't have to do anything, then return. */ | |
7117c2d2 JA |
1638 | #if defined (HANDLE_MULTIBYTE) |
1639 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1640 | a multibyte string, but _rl_last_c_pos is the display position. In | |
d3a24ed2 CR |
1641 | this case, NEW's display position is not obvious and must be |
1642 | calculated. */ | |
1643 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
1644 | { | |
1645 | if (_rl_last_c_pos == new) | |
1646 | return; | |
1647 | } | |
1648 | else if (_rl_last_c_pos == _rl_col_width (data, 0, new)) | |
1649 | return; | |
7117c2d2 | 1650 | #else |
726f6388 | 1651 | if (_rl_last_c_pos == new) return; |
7117c2d2 | 1652 | #endif |
726f6388 JA |
1653 | |
1654 | /* It may be faster to output a CR, and then move forwards instead | |
1655 | of moving backwards. */ | |
1656 | /* i == current physical cursor position. */ | |
1657 | i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
ccc6cda3 | 1658 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || |
28ef6c31 | 1659 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
1660 | { |
1661 | #if defined (__MSDOS__) | |
1662 | putc ('\r', rl_outstream); | |
1663 | #else | |
28ef6c31 | 1664 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 JA |
1665 | #endif /* !__MSDOS__ */ |
1666 | _rl_last_c_pos = 0; | |
1667 | } | |
1668 | ||
1669 | if (_rl_last_c_pos < new) | |
1670 | { | |
1671 | /* Move the cursor forward. We do it by printing the command | |
1672 | to move the cursor forward if there is one, else print that | |
1673 | portion of the output buffer again. Which is cheaper? */ | |
1674 | ||
1675 | /* The above comment is left here for posterity. It is faster | |
1676 | to print one character (non-control) than to print a control | |
1677 | sequence telling the terminal to move forward one character. | |
1678 | That kind of control is for people who don't know what the | |
1679 | data is underneath the cursor. */ | |
1680 | #if defined (HACK_TERMCAP_MOTION) | |
28ef6c31 | 1681 | if (_rl_term_forward_char) |
7117c2d2 JA |
1682 | { |
1683 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1684 | { | |
1685 | int width; | |
1686 | width = _rl_col_width (data, _rl_last_c_pos, new); | |
1687 | for (i = 0; i < width; i++) | |
1688 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1689 | } | |
1690 | else | |
1691 | { | |
1692 | for (i = _rl_last_c_pos; i < new; i++) | |
1693 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1694 | } | |
1695 | } | |
1696 | else if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1697 | { | |
1698 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1699 | for (i = 0; i < new; i++) | |
1700 | putc (data[i], rl_outstream); | |
1701 | } | |
1702 | else | |
726f6388 | 1703 | for (i = _rl_last_c_pos; i < new; i++) |
7117c2d2 JA |
1704 | putc (data[i], rl_outstream); |
1705 | ||
1706 | #else /* !HACK_TERMCAP_MOTION */ | |
1707 | ||
1708 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1709 | { | |
1710 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1711 | for (i = 0; i < new; i++) | |
1712 | putc (data[i], rl_outstream); | |
1713 | } | |
726f6388 JA |
1714 | else |
1715 | for (i = _rl_last_c_pos; i < new; i++) | |
1716 | putc (data[i], rl_outstream); | |
7117c2d2 JA |
1717 | |
1718 | #endif /* !HACK_TERMCAP_MOTION */ | |
1719 | ||
726f6388 | 1720 | } |
7117c2d2 JA |
1721 | #if defined (HANDLE_MULTIBYTE) |
1722 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1723 | The byte length of the string is probably bigger than the column width | |
1724 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1725 | display point is less than _rl_last_c_pos. */ | |
1726 | else if (_rl_last_c_pos >= new) | |
1727 | #else | |
b72432fd | 1728 | else if (_rl_last_c_pos > new) |
7117c2d2 JA |
1729 | #endif |
1730 | { | |
1731 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
d3a24ed2 | 1732 | _rl_backspace (_rl_last_c_pos - _rl_col_width (data, 0, new)); |
7117c2d2 JA |
1733 | else |
1734 | _rl_backspace (_rl_last_c_pos - new); | |
1735 | } | |
1736 | ||
1737 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1738 | _rl_last_c_pos = _rl_col_width (data, 0, new); | |
1739 | else | |
1740 | _rl_last_c_pos = new; | |
726f6388 JA |
1741 | } |
1742 | ||
1743 | /* PWP: move the cursor up or down. */ | |
1744 | void | |
1745 | _rl_move_vert (to) | |
1746 | int to; | |
1747 | { | |
1748 | register int delta, i; | |
1749 | ||
28ef6c31 | 1750 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
1751 | return; |
1752 | ||
726f6388 JA |
1753 | if ((delta = to - _rl_last_v_pos) > 0) |
1754 | { | |
1755 | for (i = 0; i < delta; i++) | |
1756 | putc ('\n', rl_outstream); | |
bb70624e JA |
1757 | #if defined (__MSDOS__) |
1758 | putc ('\r', rl_outstream); | |
1759 | #else | |
28ef6c31 | 1760 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1761 | #endif |
726f6388 JA |
1762 | _rl_last_c_pos = 0; |
1763 | } | |
1764 | else | |
1765 | { /* delta < 0 */ | |
28ef6c31 | 1766 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 1767 | for (i = 0; i < -delta; i++) |
28ef6c31 | 1768 | tputs (_rl_term_up, 1, _rl_output_character_function); |
726f6388 | 1769 | } |
bb70624e | 1770 | |
726f6388 JA |
1771 | _rl_last_v_pos = to; /* Now TO is here */ |
1772 | } | |
1773 | ||
1774 | /* Physically print C on rl_outstream. This is for functions which know | |
1775 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 1776 | int |
726f6388 JA |
1777 | rl_show_char (c) |
1778 | int c; | |
1779 | { | |
1780 | int n = 1; | |
1781 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1782 | { | |
1783 | fprintf (rl_outstream, "M-"); | |
1784 | n += 2; | |
1785 | c = UNMETA (c); | |
1786 | } | |
1787 | ||
1788 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 1789 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 1790 | #else |
ccc6cda3 | 1791 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
1792 | #endif /* !DISPLAY_TABS */ |
1793 | { | |
1794 | fprintf (rl_outstream, "C-"); | |
1795 | n += 2; | |
ccc6cda3 | 1796 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
1797 | } |
1798 | ||
1799 | putc (c, rl_outstream); | |
1800 | fflush (rl_outstream); | |
1801 | return n; | |
1802 | } | |
1803 | ||
1804 | int | |
1805 | rl_character_len (c, pos) | |
1806 | register int c, pos; | |
1807 | { | |
1808 | unsigned char uc; | |
1809 | ||
1810 | uc = (unsigned char)c; | |
1811 | ||
1812 | if (META_CHAR (uc)) | |
1813 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1814 | ||
1815 | if (uc == '\t') | |
1816 | { | |
1817 | #if defined (DISPLAY_TABS) | |
1818 | return (((pos | 7) + 1) - pos); | |
1819 | #else | |
1820 | return (2); | |
1821 | #endif /* !DISPLAY_TABS */ | |
1822 | } | |
1823 | ||
ccc6cda3 JA |
1824 | if (CTRL_CHAR (c) || c == RUBOUT) |
1825 | return (2); | |
1826 | ||
f73dda09 | 1827 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 | 1828 | } |
726f6388 JA |
1829 | /* How to print things in the "echo-area". The prompt is treated as a |
1830 | mini-modeline. */ | |
6e70dbff | 1831 | static int msg_saved_prompt = 0; |
726f6388 | 1832 | |
ccc6cda3 JA |
1833 | #if defined (USE_VARARGS) |
1834 | int | |
1835 | #if defined (PREFER_STDARG) | |
1836 | rl_message (const char *format, ...) | |
1837 | #else | |
726f6388 JA |
1838 | rl_message (va_alist) |
1839 | va_dcl | |
ccc6cda3 | 1840 | #endif |
726f6388 | 1841 | { |
726f6388 | 1842 | va_list args; |
ccc6cda3 JA |
1843 | #if defined (PREFER_VARARGS) |
1844 | char *format; | |
1845 | #endif | |
726f6388 | 1846 | |
ccc6cda3 JA |
1847 | #if defined (PREFER_STDARG) |
1848 | va_start (args, format); | |
1849 | #else | |
726f6388 JA |
1850 | va_start (args); |
1851 | format = va_arg (args, char *); | |
ccc6cda3 JA |
1852 | #endif |
1853 | ||
f73dda09 JA |
1854 | #if defined (HAVE_VSNPRINTF) |
1855 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
1856 | #else | |
726f6388 | 1857 | vsprintf (msg_buf, format, args); |
f73dda09 JA |
1858 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1859 | #endif | |
726f6388 JA |
1860 | va_end (args); |
1861 | ||
6e70dbff CR |
1862 | if (saved_local_prompt == 0) |
1863 | { | |
1864 | rl_save_prompt (); | |
1865 | msg_saved_prompt = 1; | |
1866 | } | |
726f6388 | 1867 | rl_display_prompt = msg_buf; |
6e70dbff CR |
1868 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
1869 | &prompt_last_invisible, | |
1870 | &prompt_invis_chars_first_line, | |
1871 | &prompt_physical_chars); | |
1872 | local_prompt_prefix = (char *)NULL; | |
ccc6cda3 | 1873 | (*rl_redisplay_function) (); |
6e70dbff | 1874 | |
726f6388 JA |
1875 | return 0; |
1876 | } | |
ccc6cda3 JA |
1877 | #else /* !USE_VARARGS */ |
1878 | int | |
726f6388 JA |
1879 | rl_message (format, arg1, arg2) |
1880 | char *format; | |
1881 | { | |
1882 | sprintf (msg_buf, format, arg1, arg2); | |
f73dda09 | 1883 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
6e70dbff | 1884 | |
726f6388 | 1885 | rl_display_prompt = msg_buf; |
6e70dbff CR |
1886 | if (saved_local_prompt == 0) |
1887 | { | |
1888 | rl_save_prompt (); | |
1889 | msg_saved_prompt = 1; | |
1890 | } | |
1891 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, | |
1892 | &prompt_last_invisible, | |
1893 | &prompt_invis_chars_first_line, | |
1894 | &prompt_physical_chars); | |
1895 | local_prompt_prefix = (char *)NULL; | |
ccc6cda3 | 1896 | (*rl_redisplay_function) (); |
6e70dbff | 1897 | |
726f6388 JA |
1898 | return 0; |
1899 | } | |
ccc6cda3 | 1900 | #endif /* !USE_VARARGS */ |
726f6388 JA |
1901 | |
1902 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 1903 | int |
726f6388 JA |
1904 | rl_clear_message () |
1905 | { | |
1906 | rl_display_prompt = rl_prompt; | |
6e70dbff CR |
1907 | if (msg_saved_prompt) |
1908 | { | |
1909 | rl_restore_prompt (); | |
1910 | msg_saved_prompt = 0; | |
1911 | } | |
ccc6cda3 | 1912 | (*rl_redisplay_function) (); |
726f6388 JA |
1913 | return 0; |
1914 | } | |
1915 | ||
ccc6cda3 | 1916 | int |
726f6388 JA |
1917 | rl_reset_line_state () |
1918 | { | |
1919 | rl_on_new_line (); | |
1920 | ||
1921 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
1922 | forced_display = 1; | |
1923 | return 0; | |
1924 | } | |
1925 | ||
ccc6cda3 | 1926 | void |
b72432fd | 1927 | rl_save_prompt () |
ccc6cda3 JA |
1928 | { |
1929 | saved_local_prompt = local_prompt; | |
1930 | saved_local_prefix = local_prompt_prefix; | |
6e70dbff | 1931 | saved_prefix_length = prompt_prefix_length; |
28ef6c31 JA |
1932 | saved_last_invisible = prompt_last_invisible; |
1933 | saved_visible_length = prompt_visible_length; | |
d3a24ed2 | 1934 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
762a763b | 1935 | saved_physical_chars = prompt_physical_chars; |
ccc6cda3 JA |
1936 | |
1937 | local_prompt = local_prompt_prefix = (char *)0; | |
6e70dbff | 1938 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
762a763b | 1939 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
1940 | } |
1941 | ||
1942 | void | |
b72432fd | 1943 | rl_restore_prompt () |
ccc6cda3 | 1944 | { |
28ef6c31 JA |
1945 | FREE (local_prompt); |
1946 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
1947 | |
1948 | local_prompt = saved_local_prompt; | |
1949 | local_prompt_prefix = saved_local_prefix; | |
6e70dbff | 1950 | prompt_prefix_length = saved_prefix_length; |
28ef6c31 JA |
1951 | prompt_last_invisible = saved_last_invisible; |
1952 | prompt_visible_length = saved_visible_length; | |
d3a24ed2 | 1953 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
762a763b | 1954 | prompt_physical_chars = saved_physical_chars; |
6e70dbff CR |
1955 | |
1956 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
1957 | saved_local_prompt = saved_local_prefix = (char *)0; | |
1958 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; | |
1959 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
ccc6cda3 JA |
1960 | } |
1961 | ||
1962 | char * | |
1963 | _rl_make_prompt_for_search (pchar) | |
1964 | int pchar; | |
1965 | { | |
1966 | int len; | |
1967 | char *pmt; | |
1968 | ||
b72432fd | 1969 | rl_save_prompt (); |
ccc6cda3 JA |
1970 | |
1971 | if (saved_local_prompt == 0) | |
1972 | { | |
1973 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
f73dda09 | 1974 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 1975 | if (len) |
b72432fd | 1976 | strcpy (pmt, rl_prompt); |
ccc6cda3 JA |
1977 | pmt[len] = pchar; |
1978 | pmt[len+1] = '\0'; | |
1979 | } | |
1980 | else | |
1981 | { | |
1982 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; | |
f73dda09 | 1983 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 1984 | if (len) |
b72432fd | 1985 | strcpy (pmt, saved_local_prompt); |
ccc6cda3 JA |
1986 | pmt[len] = pchar; |
1987 | pmt[len+1] = '\0'; | |
1988 | local_prompt = savestring (pmt); | |
28ef6c31 JA |
1989 | prompt_last_invisible = saved_last_invisible; |
1990 | prompt_visible_length = saved_visible_length + 1; | |
ccc6cda3 | 1991 | } |
762a763b | 1992 | |
6e70dbff CR |
1993 | prompt_physical_chars = saved_physical_chars + 1; |
1994 | ||
ccc6cda3 JA |
1995 | return pmt; |
1996 | } | |
1997 | ||
726f6388 JA |
1998 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
1999 | void | |
2000 | _rl_erase_at_end_of_line (l) | |
2001 | int l; | |
2002 | { | |
2003 | register int i; | |
2004 | ||
ccc6cda3 | 2005 | _rl_backspace (l); |
726f6388 JA |
2006 | for (i = 0; i < l; i++) |
2007 | putc (' ', rl_outstream); | |
ccc6cda3 | 2008 | _rl_backspace (l); |
726f6388 JA |
2009 | for (i = 0; i < l; i++) |
2010 | visible_line[--_rl_last_c_pos] = '\0'; | |
2011 | rl_display_fixed++; | |
2012 | } | |
2013 | ||
2014 | /* Clear to the end of the line. COUNT is the minimum | |
2015 | number of character spaces to clear, */ | |
d166f048 JA |
2016 | void |
2017 | _rl_clear_to_eol (count) | |
726f6388 JA |
2018 | int count; |
2019 | { | |
28ef6c31 JA |
2020 | if (_rl_term_clreol) |
2021 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d166f048 | 2022 | else if (count) |
726f6388 JA |
2023 | space_to_eol (count); |
2024 | } | |
2025 | ||
2026 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2027 | number of character spaces to clear, */ | |
2028 | static void | |
2029 | space_to_eol (count) | |
2030 | int count; | |
2031 | { | |
2032 | register int i; | |
2033 | ||
2034 | for (i = 0; i < count; i++) | |
2035 | putc (' ', rl_outstream); | |
2036 | ||
2037 | _rl_last_c_pos += count; | |
2038 | } | |
2039 | ||
d166f048 JA |
2040 | void |
2041 | _rl_clear_screen () | |
2042 | { | |
28ef6c31 JA |
2043 | if (_rl_term_clrpag) |
2044 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 2045 | else |
28ef6c31 | 2046 | rl_crlf (); |
d166f048 JA |
2047 | } |
2048 | ||
7117c2d2 | 2049 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 2050 | static void |
7117c2d2 | 2051 | insert_some_chars (string, count, col) |
726f6388 | 2052 | char *string; |
7117c2d2 | 2053 | int count, col; |
726f6388 | 2054 | { |
9607141c CR |
2055 | #if defined (__MSDOS__) || defined (__MINGW32__) |
2056 | _rl_output_some_chars (string, count); | |
2057 | #else | |
7117c2d2 JA |
2058 | /* DEBUGGING */ |
2059 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2060 | if (count != col) | |
2061 | fprintf(stderr, "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); | |
2062 | ||
726f6388 | 2063 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2064 | if (_rl_term_IC) |
726f6388 | 2065 | { |
ccc6cda3 | 2066 | char *buffer; |
7117c2d2 JA |
2067 | |
2068 | buffer = tgoto (_rl_term_IC, 0, col); | |
726f6388 JA |
2069 | tputs (buffer, 1, _rl_output_character_function); |
2070 | _rl_output_some_chars (string, count); | |
2071 | } | |
2072 | else | |
2073 | { | |
2074 | register int i; | |
2075 | ||
2076 | /* If we have to turn on insert-mode, then do so. */ | |
28ef6c31 JA |
2077 | if (_rl_term_im && *_rl_term_im) |
2078 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
726f6388 JA |
2079 | |
2080 | /* If there is a special command for inserting characters, then | |
2081 | use that first to open up the space. */ | |
28ef6c31 | 2082 | if (_rl_term_ic && *_rl_term_ic) |
726f6388 | 2083 | { |
7117c2d2 | 2084 | for (i = col; i--; ) |
28ef6c31 | 2085 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
726f6388 JA |
2086 | } |
2087 | ||
2088 | /* Print the text. */ | |
2089 | _rl_output_some_chars (string, count); | |
2090 | ||
2091 | /* If there is a string to turn off insert mode, we had best use | |
2092 | it now. */ | |
28ef6c31 JA |
2093 | if (_rl_term_ei && *_rl_term_ei) |
2094 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
726f6388 | 2095 | } |
9607141c | 2096 | #endif /* __MSDOS__ || __MINGW32__ */ |
726f6388 JA |
2097 | } |
2098 | ||
2099 | /* Delete COUNT characters from the display line. */ | |
2100 | static void | |
2101 | delete_chars (count) | |
2102 | int count; | |
2103 | { | |
28ef6c31 | 2104 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2105 | return; |
2106 | ||
9607141c | 2107 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
28ef6c31 | 2108 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2109 | { |
ccc6cda3 | 2110 | char *buffer; |
28ef6c31 | 2111 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2112 | tputs (buffer, count, _rl_output_character_function); |
2113 | } | |
2114 | else | |
2115 | { | |
28ef6c31 | 2116 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2117 | while (count--) |
28ef6c31 | 2118 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2119 | } |
9607141c | 2120 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
726f6388 JA |
2121 | } |
2122 | ||
2123 | void | |
2124 | _rl_update_final () | |
2125 | { | |
2126 | int full_lines; | |
2127 | ||
2128 | full_lines = 0; | |
ccc6cda3 JA |
2129 | /* If the cursor is the only thing on an otherwise-blank last line, |
2130 | compensate so we don't print an extra CRLF. */ | |
2131 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2132 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2133 | { |
2134 | _rl_vis_botlin--; | |
2135 | full_lines = 1; | |
2136 | } | |
2137 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2138 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2139 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2140 | { |
726f6388 | 2141 | char *last_line; |
7117c2d2 | 2142 | |
bb70624e | 2143 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
28ef6c31 | 2144 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
d166f048 | 2145 | _rl_clear_to_eol (0); |
28ef6c31 | 2146 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2147 | } |
2148 | _rl_vis_botlin = 0; | |
28ef6c31 | 2149 | rl_crlf (); |
726f6388 JA |
2150 | fflush (rl_outstream); |
2151 | rl_display_fixed++; | |
2152 | } | |
2153 | ||
2154 | /* Move to the start of the current line. */ | |
2155 | static void | |
2156 | cr () | |
2157 | { | |
28ef6c31 | 2158 | if (_rl_term_cr) |
726f6388 | 2159 | { |
bb70624e JA |
2160 | #if defined (__MSDOS__) |
2161 | putc ('\r', rl_outstream); | |
2162 | #else | |
28ef6c31 | 2163 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2164 | #endif |
726f6388 JA |
2165 | _rl_last_c_pos = 0; |
2166 | } | |
2167 | } | |
2168 | ||
bb70624e JA |
2169 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2170 | terminal escape sequences. Called with the cursor at column 0 of the | |
2171 | line to draw the prompt on. */ | |
2172 | static void | |
2173 | redraw_prompt (t) | |
2174 | char *t; | |
2175 | { | |
6e70dbff | 2176 | char *oldp; |
bb70624e | 2177 | |
bb70624e | 2178 | oldp = rl_display_prompt; |
6e70dbff | 2179 | rl_save_prompt (); |
bb70624e JA |
2180 | |
2181 | rl_display_prompt = t; | |
28ef6c31 JA |
2182 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2183 | &prompt_last_invisible, | |
43cdcad8 CR |
2184 | &prompt_invis_chars_first_line, |
2185 | &prompt_physical_chars); | |
bb70624e | 2186 | local_prompt_prefix = (char *)NULL; |
6e70dbff | 2187 | |
bb70624e JA |
2188 | rl_forced_update_display (); |
2189 | ||
2190 | rl_display_prompt = oldp; | |
6e70dbff | 2191 | rl_restore_prompt(); |
bb70624e JA |
2192 | } |
2193 | ||
726f6388 JA |
2194 | /* Redisplay the current line after a SIGWINCH is received. */ |
2195 | void | |
2196 | _rl_redisplay_after_sigwinch () | |
2197 | { | |
bb70624e | 2198 | char *t; |
726f6388 JA |
2199 | |
2200 | /* Clear the current line and put the cursor at column 0. Make sure | |
2201 | the right thing happens if we have wrapped to a new screen line. */ | |
28ef6c31 | 2202 | if (_rl_term_cr) |
726f6388 | 2203 | { |
bb70624e JA |
2204 | #if defined (__MSDOS__) |
2205 | putc ('\r', rl_outstream); | |
2206 | #else | |
28ef6c31 | 2207 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2208 | #endif |
726f6388 | 2209 | _rl_last_c_pos = 0; |
bb70624e | 2210 | #if defined (__MSDOS__) |
28ef6c31 | 2211 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2212 | putc ('\r', rl_outstream); |
2213 | #else | |
28ef6c31 JA |
2214 | if (_rl_term_clreol) |
2215 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2216 | else |
2217 | { | |
28ef6c31 JA |
2218 | space_to_eol (_rl_screenwidth); |
2219 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2220 | } |
bb70624e | 2221 | #endif |
726f6388 JA |
2222 | if (_rl_last_v_pos > 0) |
2223 | _rl_move_vert (0); | |
2224 | } | |
2225 | else | |
28ef6c31 | 2226 | rl_crlf (); |
726f6388 JA |
2227 | |
2228 | /* Redraw only the last line of a multi-line prompt. */ | |
2229 | t = strrchr (rl_display_prompt, '\n'); | |
2230 | if (t) | |
bb70624e | 2231 | redraw_prompt (++t); |
726f6388 JA |
2232 | else |
2233 | rl_forced_update_display (); | |
2234 | } | |
ccc6cda3 JA |
2235 | |
2236 | void | |
2237 | _rl_clean_up_for_exit () | |
2238 | { | |
2239 | if (readline_echoing_p) | |
2240 | { | |
2241 | _rl_move_vert (_rl_vis_botlin); | |
2242 | _rl_vis_botlin = 0; | |
2243 | fflush (rl_outstream); | |
b72432fd | 2244 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2245 | } |
2246 | } | |
b72432fd JA |
2247 | |
2248 | void | |
2249 | _rl_erase_entire_line () | |
2250 | { | |
2251 | cr (); | |
2252 | _rl_clear_to_eol (0); | |
2253 | cr (); | |
2254 | fflush (rl_outstream); | |
2255 | } | |
bb70624e JA |
2256 | |
2257 | /* return the `current display line' of the cursor -- the number of lines to | |
2258 | move up to get to the first screen line of the current readline line. */ | |
2259 | int | |
2260 | _rl_current_display_line () | |
2261 | { | |
2262 | int ret, nleft; | |
2263 | ||
2264 | /* Find out whether or not there might be invisible characters in the | |
2265 | editing buffer. */ | |
2266 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2267 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2268 | else |
28ef6c31 | 2269 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2270 | |
2271 | if (nleft > 0) | |
28ef6c31 | 2272 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2273 | else |
2274 | ret = 0; | |
2275 | ||
2276 | return ret; | |
2277 | } | |
7117c2d2 JA |
2278 | |
2279 | #if defined (HANDLE_MULTIBYTE) | |
2280 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2281 | In the case of multibyte characters with stateful encoding, we have to | |
2282 | scan from the beginning of the string to take the state into account. */ | |
2283 | static int | |
2284 | _rl_col_width (str, start, end) | |
d3a24ed2 | 2285 | const char *str; |
7117c2d2 JA |
2286 | int start, end; |
2287 | { | |
2288 | wchar_t wc; | |
2289 | mbstate_t ps = {0}; | |
2290 | int tmp, point, width, max; | |
2291 | ||
2292 | if (end <= start) | |
2293 | return 0; | |
2294 | ||
2295 | point = 0; | |
2296 | max = end; | |
2297 | ||
2298 | while (point < start) | |
2299 | { | |
2300 | tmp = mbrlen (str + point, max, &ps); | |
d3a24ed2 | 2301 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2302 | { |
2303 | /* In this case, the bytes are invalid or too short to compose a | |
2304 | multibyte character, so we assume that the first byte represents | |
2305 | a single character. */ | |
2306 | point++; | |
2307 | max--; | |
2308 | ||
2309 | /* Clear the state of the byte sequence, because in this case the | |
2310 | effect of mbstate is undefined. */ | |
2311 | memset (&ps, 0, sizeof (mbstate_t)); | |
2312 | } | |
d3a24ed2 | 2313 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2314 | break; /* Found '\0' */ |
7117c2d2 JA |
2315 | else |
2316 | { | |
2317 | point += tmp; | |
2318 | max -= tmp; | |
2319 | } | |
2320 | } | |
2321 | ||
2322 | /* If START is not a byte that starts a character, then POINT will be | |
2323 | greater than START. In this case, assume that (POINT - START) gives | |
2324 | a byte count that is the number of columns of difference. */ | |
2325 | width = point - start; | |
2326 | ||
2327 | while (point < end) | |
2328 | { | |
2329 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
d3a24ed2 | 2330 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2331 | { |
2332 | /* In this case, the bytes are invalid or too short to compose a | |
2333 | multibyte character, so we assume that the first byte represents | |
2334 | a single character. */ | |
2335 | point++; | |
2336 | max--; | |
2337 | ||
2338 | /* and assume that the byte occupies a single column. */ | |
2339 | width++; | |
2340 | ||
2341 | /* Clear the state of the byte sequence, because in this case the | |
2342 | effect of mbstate is undefined. */ | |
2343 | memset (&ps, 0, sizeof (mbstate_t)); | |
2344 | } | |
d3a24ed2 | 2345 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2346 | break; /* Found '\0' */ |
7117c2d2 JA |
2347 | else |
2348 | { | |
2349 | point += tmp; | |
2350 | max -= tmp; | |
2351 | tmp = wcwidth(wc); | |
2352 | width += (tmp >= 0) ? tmp : 1; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | width += point - end; | |
2357 | ||
2358 | return width; | |
2359 | } | |
2360 | #endif /* HANDLE_MULTIBYTE */ |