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726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
b80f6443 | 3 | /* Copyright (C) 1987-2004 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) |
b80f6443 | 73 | static int _rl_col_width PARAMS((const char *, int, int)); |
7117c2d2 JA |
74 | static int *_rl_wrapped_line; |
75 | #else | |
76 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
77 | #endif | |
78 | ||
ccc6cda3 | 79 | static int *inv_lbreaks, *vis_lbreaks; |
bb70624e | 80 | static int inv_lbsize, vis_lbsize; |
726f6388 JA |
81 | |
82 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
83 | by backing up or outputting a carriage return and moving forward. */ | |
84 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
85 | ||
86 | /* **************************************************************** */ | |
87 | /* */ | |
88 | /* Display stuff */ | |
89 | /* */ | |
90 | /* **************************************************************** */ | |
91 | ||
92 | /* This is the stuff that is hard for me. I never seem to write good | |
93 | display routines in C. Let's see how I do this time. */ | |
94 | ||
95 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
96 | the problems of input lines longer than the screen width. | |
97 | ||
98 | update_line and the code that calls it makes a multiple line, | |
99 | automatically wrapping line update. Careful attention needs | |
100 | to be paid to the vertical position variables. */ | |
101 | ||
102 | /* Keep two buffers; one which reflects the current contents of the | |
103 | screen, and the other to draw what we think the new contents should | |
104 | be. Then compare the buffers, and make whatever changes to the | |
105 | screen itself that we should. Finally, make the buffer that we | |
106 | just drew into be the one which reflects the current contents of the | |
107 | screen, and place the cursor where it belongs. | |
108 | ||
109 | Commands that want to can fix the display themselves, and then let | |
110 | this function know that the display has been fixed by setting the | |
111 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
112 | ||
ccc6cda3 | 113 | /* Application-specific redisplay function. */ |
28ef6c31 | 114 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 115 | |
726f6388 JA |
116 | /* Global variables declared here. */ |
117 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
118 | int rl_display_fixed = 0; | |
119 | ||
ccc6cda3 JA |
120 | int _rl_suppress_redisplay = 0; |
121 | ||
726f6388 JA |
122 | /* The stuff that gets printed out before the actual text of the line. |
123 | This is usually pointing to rl_prompt. */ | |
124 | char *rl_display_prompt = (char *)NULL; | |
125 | ||
126 | /* Pseudo-global variables declared here. */ | |
127 | /* The visible cursor position. If you print some text, adjust this. */ | |
128 | int _rl_last_c_pos = 0; | |
129 | int _rl_last_v_pos = 0; | |
130 | ||
131 | /* Number of lines currently on screen minus 1. */ | |
132 | int _rl_vis_botlin = 0; | |
133 | ||
134 | /* Variables used only in this file. */ | |
135 | /* The last left edge of text that was displayed. This is used when | |
136 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 137 | static int last_lmargin; |
726f6388 JA |
138 | |
139 | /* The line display buffers. One is the line currently displayed on | |
140 | the screen. The other is the line about to be displayed. */ | |
141 | static char *visible_line = (char *)NULL; | |
142 | static char *invisible_line = (char *)NULL; | |
143 | ||
144 | /* A buffer for `modeline' messages. */ | |
145 | static char msg_buf[128]; | |
146 | ||
147 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 148 | static int forced_display; |
726f6388 JA |
149 | |
150 | /* Default and initial buffer size. Can grow. */ | |
151 | static int line_size = 1024; | |
152 | ||
28ef6c31 JA |
153 | /* Variables to keep track of the expanded prompt string, which may |
154 | include invisible characters. */ | |
155 | ||
726f6388 | 156 | static char *local_prompt, *local_prompt_prefix; |
28ef6c31 | 157 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
158 | |
159 | /* The number of invisible characters in the line currently being | |
160 | displayed on the screen. */ | |
ccc6cda3 JA |
161 | static int visible_wrap_offset; |
162 | ||
28ef6c31 JA |
163 | /* The number of invisible characters in the prompt string. Static so it |
164 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
165 | static int wrap_offset; |
166 | ||
28ef6c31 JA |
167 | /* The index of the last invisible character in the prompt string. */ |
168 | static int prompt_last_invisible; | |
726f6388 JA |
169 | |
170 | /* The length (buffer offset) of the first line of the last (possibly | |
171 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 172 | static int visible_first_line_len; |
726f6388 | 173 | |
28ef6c31 JA |
174 | /* Number of invisible characters on the first physical line of the prompt. |
175 | Only valid when the number of physical characters in the prompt exceeds | |
176 | (or is equal to) _rl_screenwidth. */ | |
177 | static int prompt_invis_chars_first_line; | |
178 | ||
179 | static int prompt_last_screen_line; | |
180 | ||
b80f6443 JA |
181 | static int prompt_physical_chars; |
182 | ||
726f6388 JA |
183 | /* Expand the prompt string S and return the number of visible |
184 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 185 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
186 | index of the last invisible character in the returned string. NIFLP, |
187 | if non-zero, is a place to store the number of invisible characters in | |
b80f6443 JA |
188 | the first prompt line. The previous are used as byte counts -- indexes |
189 | into a character buffer. */ | |
726f6388 JA |
190 | |
191 | /* Current implementation: | |
192 | \001 (^A) start non-visible characters | |
193 | \002 (^B) end non-visible characters | |
194 | all characters except \001 and \002 (following a \001) are copied to | |
195 | the returned string; all characters except those between \001 and | |
196 | \002 are assumed to be `visible'. */ | |
197 | ||
198 | static char * | |
b80f6443 | 199 | expand_prompt (pmt, lp, lip, niflp, vlp) |
726f6388 | 200 | char *pmt; |
b80f6443 | 201 | int *lp, *lip, *niflp, *vlp; |
726f6388 JA |
202 | { |
203 | char *r, *ret, *p; | |
eb873671 | 204 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
726f6388 JA |
205 | |
206 | /* Short-circuit if we can. */ | |
b80f6443 | 207 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 JA |
208 | { |
209 | r = savestring (pmt); | |
210 | if (lp) | |
211 | *lp = strlen (r); | |
b80f6443 JA |
212 | if (lip) |
213 | *lip = 0; | |
214 | if (niflp) | |
215 | *niflp = 0; | |
216 | if (vlp) | |
217 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
218 | return r; |
219 | } | |
220 | ||
ccc6cda3 | 221 | l = strlen (pmt); |
f73dda09 | 222 | r = ret = (char *)xmalloc (l + 1); |
28ef6c31 JA |
223 | |
224 | invfl = 0; /* invisible chars in first line of prompt */ | |
eb873671 | 225 | invflset = 0; /* we only want to set invfl once */ |
28ef6c31 | 226 | |
b80f6443 | 227 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
726f6388 JA |
228 | { |
229 | /* This code strips the invisible character string markers | |
230 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
231 | if (*p == RL_PROMPT_START_IGNORE) | |
232 | { | |
233 | ignoring++; | |
234 | continue; | |
235 | } | |
236 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
237 | { | |
238 | ignoring = 0; | |
ccc6cda3 | 239 | last = r - ret - 1; |
726f6388 JA |
240 | continue; |
241 | } | |
242 | else | |
243 | { | |
b80f6443 JA |
244 | #if defined (HANDLE_MULTIBYTE) |
245 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
246 | { | |
247 | pind = p - pmt; | |
248 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
249 | l = ind - pind; | |
250 | while (l--) | |
251 | *r++ = *p++; | |
252 | if (!ignoring) | |
eb873671 JA |
253 | { |
254 | rl += ind - pind; | |
255 | physchars += _rl_col_width (pmt, pind, ind); | |
256 | } | |
b80f6443 JA |
257 | else |
258 | ninvis += ind - pind; | |
259 | p--; /* compensate for later increment */ | |
260 | } | |
28ef6c31 | 261 | else |
b80f6443 JA |
262 | #endif |
263 | { | |
264 | *r++ = *p; | |
265 | if (!ignoring) | |
eb873671 JA |
266 | { |
267 | rl++; /* visible length byte counter */ | |
268 | physchars++; | |
269 | } | |
b80f6443 JA |
270 | else |
271 | ninvis++; /* invisible chars byte counter */ | |
272 | } | |
273 | ||
eb873671 JA |
274 | if (invflset == 0 && rl >= _rl_screenwidth) |
275 | { | |
276 | invfl = ninvis; | |
277 | invflset = 1; | |
278 | } | |
726f6388 JA |
279 | } |
280 | } | |
281 | ||
28ef6c31 JA |
282 | if (rl < _rl_screenwidth) |
283 | invfl = ninvis; | |
284 | ||
726f6388 JA |
285 | *r = '\0'; |
286 | if (lp) | |
287 | *lp = rl; | |
ccc6cda3 JA |
288 | if (lip) |
289 | *lip = last; | |
28ef6c31 JA |
290 | if (niflp) |
291 | *niflp = invfl; | |
b80f6443 JA |
292 | if (vlp) |
293 | *vlp = physchars; | |
726f6388 JA |
294 | return ret; |
295 | } | |
296 | ||
bb70624e JA |
297 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
298 | PMT and return the rest of PMT. */ | |
299 | char * | |
300 | _rl_strip_prompt (pmt) | |
301 | char *pmt; | |
302 | { | |
303 | char *ret; | |
304 | ||
b80f6443 | 305 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
306 | return ret; |
307 | } | |
308 | ||
726f6388 JA |
309 | /* |
310 | * Expand the prompt string into the various display components, if | |
311 | * necessary. | |
312 | * | |
313 | * local_prompt = expanded last line of string in rl_display_prompt | |
314 | * (portion after the final newline) | |
315 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
316 | * expanded via expand_prompt | |
28ef6c31 JA |
317 | * prompt_visible_length = number of visible characters in local_prompt |
318 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
319 | * |
320 | * This function is called once per call to readline(). It may also be | |
321 | * called arbitrarily to expand the primary prompt. | |
322 | * | |
323 | * The return value is the number of visible characters on the last line | |
324 | * of the (possibly multi-line) prompt. | |
325 | */ | |
326 | int | |
327 | rl_expand_prompt (prompt) | |
328 | char *prompt; | |
329 | { | |
330 | char *p, *t; | |
331 | int c; | |
332 | ||
333 | /* Clear out any saved values. */ | |
28ef6c31 JA |
334 | FREE (local_prompt); |
335 | FREE (local_prompt_prefix); | |
336 | ||
726f6388 | 337 | local_prompt = local_prompt_prefix = (char *)0; |
28ef6c31 | 338 | prompt_last_invisible = prompt_visible_length = 0; |
726f6388 | 339 | |
ccc6cda3 | 340 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
341 | return (0); |
342 | ||
343 | p = strrchr (prompt, '\n'); | |
344 | if (!p) | |
345 | { | |
28ef6c31 JA |
346 | /* The prompt is only one logical line, though it might wrap. */ |
347 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
348 | &prompt_last_invisible, | |
b80f6443 JA |
349 | &prompt_invis_chars_first_line, |
350 | &prompt_physical_chars); | |
726f6388 | 351 | local_prompt_prefix = (char *)0; |
28ef6c31 | 352 | return (prompt_visible_length); |
726f6388 JA |
353 | } |
354 | else | |
355 | { | |
356 | /* The prompt spans multiple lines. */ | |
357 | t = ++p; | |
28ef6c31 JA |
358 | local_prompt = expand_prompt (p, &prompt_visible_length, |
359 | &prompt_last_invisible, | |
b80f6443 | 360 | (int *)NULL, |
eb873671 | 361 | &prompt_physical_chars); |
726f6388 JA |
362 | c = *t; *t = '\0'; |
363 | /* The portion of the prompt string up to and including the | |
364 | final newline is now null-terminated. */ | |
28ef6c31 JA |
365 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
366 | (int *)NULL, | |
b80f6443 | 367 | &prompt_invis_chars_first_line, |
eb873671 | 368 | (int *)NULL); |
726f6388 | 369 | *t = c; |
28ef6c31 | 370 | return (prompt_prefix_length); |
726f6388 JA |
371 | } |
372 | } | |
373 | ||
bb70624e JA |
374 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
375 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
376 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
377 | increased. If the lines have already been allocated, this ensures that | |
378 | they can hold at least MINSIZE characters. */ | |
379 | static void | |
380 | init_line_structures (minsize) | |
381 | int minsize; | |
382 | { | |
383 | register int n; | |
384 | ||
385 | if (invisible_line == 0) /* initialize it */ | |
386 | { | |
387 | if (line_size < minsize) | |
388 | line_size = minsize; | |
f73dda09 JA |
389 | visible_line = (char *)xmalloc (line_size); |
390 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
391 | } |
392 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
393 | { | |
394 | line_size *= 2; | |
395 | if (line_size < minsize) | |
396 | line_size = minsize; | |
f73dda09 JA |
397 | visible_line = (char *)xrealloc (visible_line, line_size); |
398 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
399 | } |
400 | ||
401 | for (n = minsize; n < line_size; n++) | |
402 | { | |
403 | visible_line[n] = 0; | |
404 | invisible_line[n] = 1; | |
405 | } | |
406 | ||
407 | if (vis_lbreaks == 0) | |
408 | { | |
409 | /* should be enough. */ | |
410 | inv_lbsize = vis_lbsize = 256; | |
411 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
412 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
7117c2d2 JA |
413 | #if defined (HANDLE_MULTIBYTE) |
414 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
415 | #endif | |
bb70624e JA |
416 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
417 | } | |
418 | } | |
419 | ||
726f6388 JA |
420 | /* Basic redisplay algorithm. */ |
421 | void | |
422 | rl_redisplay () | |
423 | { | |
ccc6cda3 JA |
424 | register int in, out, c, linenum, cursor_linenum; |
425 | register char *line; | |
426 | int c_pos, inv_botlin, lb_botlin, lb_linenum; | |
eb873671 | 427 | int newlines, lpos, temp, modmark, n0, num; |
726f6388 | 428 | char *prompt_this_line; |
7117c2d2 JA |
429 | #if defined (HANDLE_MULTIBYTE) |
430 | wchar_t wc; | |
431 | size_t wc_bytes; | |
432 | int wc_width; | |
433 | mbstate_t ps; | |
434 | int _rl_wrapped_multicolumn = 0; | |
435 | #endif | |
726f6388 JA |
436 | |
437 | if (!readline_echoing_p) | |
438 | return; | |
439 | ||
440 | if (!rl_display_prompt) | |
441 | rl_display_prompt = ""; | |
442 | ||
ccc6cda3 | 443 | if (invisible_line == 0) |
726f6388 | 444 | { |
bb70624e | 445 | init_line_structures (0); |
726f6388 JA |
446 | rl_on_new_line (); |
447 | } | |
448 | ||
449 | /* Draw the line into the buffer. */ | |
450 | c_pos = -1; | |
451 | ||
ccc6cda3 JA |
452 | line = invisible_line; |
453 | out = inv_botlin = 0; | |
454 | ||
726f6388 JA |
455 | /* Mark the line as modified or not. We only do this for history |
456 | lines. */ | |
b80f6443 | 457 | modmark = 0; |
726f6388 JA |
458 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
459 | { | |
460 | line[out++] = '*'; | |
461 | line[out] = '\0'; | |
b80f6443 | 462 | modmark = 1; |
726f6388 JA |
463 | } |
464 | ||
465 | /* If someone thought that the redisplay was handled, but the currently | |
466 | visible line has a different modification state than the one about | |
467 | to become visible, then correct the caller's misconception. */ | |
468 | if (visible_line[0] != invisible_line[0]) | |
469 | rl_display_fixed = 0; | |
470 | ||
471 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
472 | one passed to readline()), use the values we have already expanded. | |
473 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
474 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 475 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 JA |
476 | { |
477 | int local_len = local_prompt ? strlen (local_prompt) : 0; | |
478 | if (local_prompt_prefix && forced_display) | |
479 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
480 | ||
481 | if (local_len > 0) | |
ccc6cda3 | 482 | { |
b72432fd JA |
483 | temp = local_len + out + 2; |
484 | if (temp >= line_size) | |
485 | { | |
486 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
487 | visible_line = (char *)xrealloc (visible_line, line_size); |
488 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 489 | } |
ccc6cda3 JA |
490 | strncpy (line + out, local_prompt, local_len); |
491 | out += local_len; | |
492 | } | |
726f6388 | 493 | line[out] = '\0'; |
28ef6c31 | 494 | wrap_offset = local_len - prompt_visible_length; |
726f6388 JA |
495 | } |
496 | else | |
497 | { | |
498 | int pmtlen; | |
499 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
500 | if (!prompt_this_line) | |
501 | prompt_this_line = rl_display_prompt; | |
502 | else | |
503 | { | |
504 | prompt_this_line++; | |
bb70624e | 505 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 506 | if (forced_display) |
ccc6cda3 | 507 | { |
bb70624e | 508 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
509 | /* Make sure we are at column zero even after a newline, |
510 | regardless of the state of terminal output processing. */ | |
bb70624e | 511 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
512 | cr (); |
513 | } | |
726f6388 JA |
514 | } |
515 | ||
b80f6443 | 516 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
517 | temp = pmtlen + out + 2; |
518 | if (temp >= line_size) | |
519 | { | |
520 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
521 | visible_line = (char *)xrealloc (visible_line, line_size); |
522 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 523 | } |
726f6388 JA |
524 | strncpy (line + out, prompt_this_line, pmtlen); |
525 | out += pmtlen; | |
526 | line[out] = '\0'; | |
28ef6c31 | 527 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
528 | } |
529 | ||
bb70624e JA |
530 | #define CHECK_INV_LBREAKS() \ |
531 | do { \ | |
532 | if (newlines >= (inv_lbsize - 2)) \ | |
533 | { \ | |
534 | inv_lbsize *= 2; \ | |
535 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
536 | } \ | |
537 | } while (0) | |
7117c2d2 JA |
538 | |
539 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
540 | #define CHECK_LPOS() \ |
541 | do { \ | |
b72432fd | 542 | lpos++; \ |
28ef6c31 | 543 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 544 | { \ |
bb70624e JA |
545 | if (newlines >= (inv_lbsize - 2)) \ |
546 | { \ | |
547 | inv_lbsize *= 2; \ | |
548 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
7117c2d2 | 549 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
bb70624e | 550 | } \ |
b72432fd | 551 | inv_lbreaks[++newlines] = out; \ |
7117c2d2 | 552 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
b72432fd JA |
553 | lpos = 0; \ |
554 | } \ | |
ccc6cda3 | 555 | } while (0) |
7117c2d2 JA |
556 | #else |
557 | #define CHECK_LPOS() \ | |
558 | do { \ | |
559 | lpos++; \ | |
560 | if (lpos >= _rl_screenwidth) \ | |
561 | { \ | |
562 | if (newlines >= (inv_lbsize - 2)) \ | |
563 | { \ | |
564 | inv_lbsize *= 2; \ | |
565 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
566 | } \ | |
567 | inv_lbreaks[++newlines] = out; \ | |
568 | lpos = 0; \ | |
569 | } \ | |
570 | } while (0) | |
571 | #endif | |
ccc6cda3 JA |
572 | |
573 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
574 | inv_lbreaks[newlines = 0] = 0; | |
b80f6443 | 575 | #if 0 |
d166f048 | 576 | lpos = out - wrap_offset; |
b80f6443 JA |
577 | #else |
578 | lpos = prompt_physical_chars + modmark; | |
579 | #endif | |
580 | ||
7117c2d2 JA |
581 | #if defined (HANDLE_MULTIBYTE) |
582 | memset (_rl_wrapped_line, 0, vis_lbsize); | |
eb873671 | 583 | num = 0; |
7117c2d2 | 584 | #endif |
d166f048 | 585 | |
28ef6c31 JA |
586 | /* prompt_invis_chars_first_line is the number of invisible characters in |
587 | the first physical line of the prompt. | |
588 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
589 | chars on the second line. */ | |
590 | ||
591 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 592 | contents of the command line? */ |
28ef6c31 | 593 | while (lpos >= _rl_screenwidth) |
d166f048 | 594 | { |
28ef6c31 JA |
595 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
596 | invisible characters that is longer than the screen width. The | |
597 | prompt_invis_chars_first_line variable could be made into an array | |
598 | saying how many invisible characters there are per line, but that's | |
599 | probably too much work for the benefit gained. How many people have | |
b80f6443 JA |
600 | prompts that exceed two physical lines? |
601 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
eb873671 JA |
602 | #if defined (HANDLE_MULTIBYTE) |
603 | n0 = num; | |
604 | temp = local_prompt ? strlen (local_prompt) : 0; | |
605 | while (num < temp) | |
606 | { | |
607 | if (_rl_col_width (local_prompt, n0, num) > _rl_screenwidth) | |
608 | { | |
609 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
610 | break; | |
611 | } | |
612 | num++; | |
613 | } | |
614 | temp = num + | |
615 | #else | |
28ef6c31 | 616 | temp = ((newlines + 1) * _rl_screenwidth) + |
eb873671 | 617 | #endif /* !HANDLE_MULTIBYTE */ |
b80f6443 JA |
618 | ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line |
619 | : ((newlines == 1) ? wrap_offset : 0)) | |
620 | : ((newlines == 0) ? wrap_offset :0)); | |
621 | ||
d166f048 | 622 | inv_lbreaks[++newlines] = temp; |
eb873671 JA |
623 | #if defined (HANDLE_MULTIBYTE) |
624 | lpos -= _rl_col_width (local_prompt, n0, num); | |
625 | #else | |
28ef6c31 | 626 | lpos -= _rl_screenwidth; |
eb873671 | 627 | #endif |
d166f048 | 628 | } |
ccc6cda3 | 629 | |
28ef6c31 JA |
630 | prompt_last_screen_line = newlines; |
631 | ||
632 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
633 | track of where the cursor is (c_pos), the number of the line containing | |
634 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). | |
635 | It maintains an array of line breaks for display (inv_lbreaks). | |
636 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 637 | lb_linenum = 0; |
7117c2d2 JA |
638 | #if defined (HANDLE_MULTIBYTE) |
639 | in = 0; | |
640 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
641 | { | |
642 | memset (&ps, 0, sizeof (mbstate_t)); | |
643 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
644 | } | |
645 | else | |
646 | wc_bytes = 1; | |
647 | while (in < rl_end) | |
648 | #else | |
d166f048 | 649 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 650 | #endif |
726f6388 JA |
651 | { |
652 | c = (unsigned char)rl_line_buffer[in]; | |
653 | ||
7117c2d2 JA |
654 | #if defined (HANDLE_MULTIBYTE) |
655 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
656 | { | |
b80f6443 | 657 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
658 | { |
659 | /* Byte sequence is invalid or shortened. Assume that the | |
660 | first byte represents a character. */ | |
661 | wc_bytes = 1; | |
662 | /* Assume that a character occupies a single column. */ | |
663 | wc_width = 1; | |
664 | memset (&ps, 0, sizeof (mbstate_t)); | |
665 | } | |
b80f6443 | 666 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
667 | break; /* Found '\0' */ |
668 | else | |
669 | { | |
670 | temp = wcwidth (wc); | |
b80f6443 | 671 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
672 | } |
673 | } | |
674 | #endif | |
675 | ||
726f6388 JA |
676 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
677 | { | |
678 | line_size *= 2; | |
f73dda09 JA |
679 | visible_line = (char *)xrealloc (visible_line, line_size); |
680 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
681 | line = invisible_line; |
682 | } | |
683 | ||
684 | if (in == rl_point) | |
ccc6cda3 JA |
685 | { |
686 | c_pos = out; | |
687 | lb_linenum = newlines; | |
688 | } | |
726f6388 | 689 | |
7117c2d2 JA |
690 | #if defined (HANDLE_MULTIBYTE) |
691 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
692 | #else | |
726f6388 | 693 | if (META_CHAR (c)) |
7117c2d2 | 694 | #endif |
726f6388 JA |
695 | { |
696 | if (_rl_output_meta_chars == 0) | |
697 | { | |
698 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 699 | |
28ef6c31 | 700 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 701 | { |
28ef6c31 | 702 | temp = _rl_screenwidth - lpos; |
bb70624e | 703 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
704 | inv_lbreaks[++newlines] = out + temp; |
705 | lpos = 4 - temp; | |
706 | } | |
707 | else | |
708 | lpos += 4; | |
709 | ||
726f6388 JA |
710 | out += 4; |
711 | } | |
712 | else | |
ccc6cda3 JA |
713 | { |
714 | line[out++] = c; | |
715 | CHECK_LPOS(); | |
716 | } | |
726f6388 JA |
717 | } |
718 | #if defined (DISPLAY_TABS) | |
719 | else if (c == '\t') | |
720 | { | |
28ef6c31 | 721 | register int newout; |
b72432fd JA |
722 | |
723 | #if 0 | |
ccc6cda3 | 724 | newout = (out | (int)7) + 1; |
b72432fd JA |
725 | #else |
726 | newout = out + 8 - lpos % 8; | |
727 | #endif | |
ccc6cda3 | 728 | temp = newout - out; |
28ef6c31 | 729 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
730 | { |
731 | register int temp2; | |
28ef6c31 | 732 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 733 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
734 | inv_lbreaks[++newlines] = out + temp2; |
735 | lpos = temp - temp2; | |
736 | while (out < newout) | |
737 | line[out++] = ' '; | |
738 | } | |
739 | else | |
740 | { | |
741 | while (out < newout) | |
742 | line[out++] = ' '; | |
743 | lpos += temp; | |
744 | } | |
726f6388 JA |
745 | } |
746 | #endif | |
28ef6c31 | 747 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
748 | { |
749 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 750 | CHECK_INV_LBREAKS (); |
b72432fd JA |
751 | inv_lbreaks[++newlines] = out; |
752 | lpos = 0; | |
753 | } | |
ccc6cda3 | 754 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
755 | { |
756 | line[out++] = '^'; | |
ccc6cda3 JA |
757 | CHECK_LPOS(); |
758 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
759 | CHECK_LPOS(); | |
726f6388 | 760 | } |
ccc6cda3 | 761 | else |
726f6388 | 762 | { |
7117c2d2 JA |
763 | #if defined (HANDLE_MULTIBYTE) |
764 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
765 | { | |
766 | register int i; | |
767 | ||
768 | _rl_wrapped_multicolumn = 0; | |
769 | ||
770 | if (_rl_screenwidth < lpos + wc_width) | |
771 | for (i = lpos; i < _rl_screenwidth; i++) | |
772 | { | |
773 | /* The space will be removed in update_line() */ | |
774 | line[out++] = ' '; | |
775 | _rl_wrapped_multicolumn++; | |
776 | CHECK_LPOS(); | |
777 | } | |
778 | if (in == rl_point) | |
779 | { | |
780 | c_pos = out; | |
781 | lb_linenum = newlines; | |
782 | } | |
783 | for (i = in; i < in+wc_bytes; i++) | |
784 | line[out++] = rl_line_buffer[i]; | |
785 | for (i = 0; i < wc_width; i++) | |
786 | CHECK_LPOS(); | |
787 | } | |
788 | else | |
789 | { | |
790 | line[out++] = c; | |
791 | CHECK_LPOS(); | |
792 | } | |
793 | #else | |
ccc6cda3 JA |
794 | line[out++] = c; |
795 | CHECK_LPOS(); | |
7117c2d2 JA |
796 | #endif |
797 | } | |
798 | ||
799 | #if defined (HANDLE_MULTIBYTE) | |
800 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
801 | { | |
802 | in += wc_bytes; | |
803 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
726f6388 | 804 | } |
7117c2d2 JA |
805 | else |
806 | in++; | |
807 | #endif | |
808 | ||
726f6388 JA |
809 | } |
810 | line[out] = '\0'; | |
811 | if (c_pos < 0) | |
ccc6cda3 JA |
812 | { |
813 | c_pos = out; | |
814 | lb_linenum = newlines; | |
815 | } | |
816 | ||
817 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 818 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
819 | inv_lbreaks[newlines+1] = out; |
820 | cursor_linenum = lb_linenum; | |
726f6388 | 821 | |
28ef6c31 JA |
822 | /* C_POS == position in buffer where cursor should be placed. |
823 | CURSOR_LINENUM == line number where the cursor should be placed. */ | |
726f6388 JA |
824 | |
825 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
826 | line buffers are really multiple lines, which would wrap every | |
827 | (screenwidth - 1) characters. Go through each in turn, finding | |
828 | the changed region and updating it. The line order is top to bottom. */ | |
829 | ||
830 | /* If we can move the cursor up and down, then use multiple lines, | |
831 | otherwise, let long lines display in a single terminal line, and | |
832 | horizontally scroll it. */ | |
833 | ||
28ef6c31 | 834 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 835 | { |
ccc6cda3 | 836 | int nleft, pos, changed_screen_line; |
726f6388 JA |
837 | |
838 | if (!rl_display_fixed || forced_display) | |
839 | { | |
840 | forced_display = 0; | |
841 | ||
842 | /* If we have more than a screenful of material to display, then | |
843 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 844 | not the first. */ |
28ef6c31 | 845 | if (out >= _rl_screenchars) |
7117c2d2 JA |
846 | { |
847 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
848 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
849 | else | |
850 | out = _rl_screenchars - 1; | |
851 | } | |
726f6388 JA |
852 | |
853 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
854 | second and subsequent lines start at inv_lbreaks[N], offset by |
855 | OFFSET (which has already been calculated above). */ | |
726f6388 JA |
856 | |
857 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
ccc6cda3 JA |
858 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
859 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
860 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 861 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 862 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 JA |
863 | |
864 | /* For each line in the buffer, do the updating display. */ | |
865 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
866 | { | |
867 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, | |
ccc6cda3 | 868 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 JA |
869 | |
870 | /* If this is the line with the prompt, we might need to | |
871 | compensate for invisible characters in the new line. Do | |
872 | this only if there is not more than one new line (which | |
873 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
874 | and the new line is shorter than the old. Make sure we are |
875 | at the end of the new line before clearing. */ | |
726f6388 | 876 | if (linenum == 0 && |
ccc6cda3 | 877 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
878 | (wrap_offset > visible_wrap_offset) && |
879 | (_rl_last_c_pos < visible_first_line_len)) | |
880 | { | |
28ef6c31 | 881 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; |
726f6388 | 882 | if (nleft) |
d166f048 | 883 | _rl_clear_to_eol (nleft); |
726f6388 JA |
884 | } |
885 | ||
886 | /* Since the new first line is now visible, save its length. */ | |
887 | if (linenum == 0) | |
ccc6cda3 | 888 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
889 | } |
890 | ||
891 | /* We may have deleted some lines. If so, clear the left over | |
892 | blank ones at the bottom out. */ | |
893 | if (_rl_vis_botlin > inv_botlin) | |
894 | { | |
895 | char *tt; | |
896 | for (; linenum <= _rl_vis_botlin; linenum++) | |
897 | { | |
898 | tt = VIS_CHARS (linenum); | |
899 | _rl_move_vert (linenum); | |
900 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 901 | _rl_clear_to_eol |
28ef6c31 | 902 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
903 | } |
904 | } | |
905 | _rl_vis_botlin = inv_botlin; | |
906 | ||
726f6388 JA |
907 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
908 | different screen line during this redisplay. */ | |
909 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
910 | if (changed_screen_line) | |
911 | { | |
912 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 913 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
914 | the physical cursor position on the screen stays the same, |
915 | but the buffer position needs to be adjusted to account | |
916 | for invisible characters. */ | |
726f6388 | 917 | if (cursor_linenum == 0 && wrap_offset) |
b72432fd | 918 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
919 | } |
920 | ||
921 | /* We have to reprint the prompt if it contains invisible | |
922 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
923 | the characters from the current cursor position. But we |
924 | only need to reprint it if the cursor is before the last | |
925 | invisible character in the prompt string. */ | |
28ef6c31 | 926 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 927 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
28ef6c31 | 928 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
726f6388 | 929 | { |
bb70624e JA |
930 | #if defined (__MSDOS__) |
931 | putc ('\r', rl_outstream); | |
932 | #else | |
28ef6c31 JA |
933 | if (_rl_term_cr) |
934 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 935 | #endif |
726f6388 | 936 | _rl_output_some_chars (local_prompt, nleft); |
7117c2d2 | 937 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
b80f6443 | 938 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft); |
7117c2d2 JA |
939 | else |
940 | _rl_last_c_pos = nleft; | |
726f6388 JA |
941 | } |
942 | ||
943 | /* Where on that line? And where does that line start | |
944 | in the buffer? */ | |
ccc6cda3 | 945 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 JA |
946 | /* nleft == number of characters in the line buffer between the |
947 | start of the line and the cursor position. */ | |
948 | nleft = c_pos - pos; | |
949 | ||
ccc6cda3 | 950 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 951 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 952 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
953 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
954 | { | |
ccc6cda3 | 955 | _rl_backspace (_rl_last_c_pos - nleft); |
7117c2d2 JA |
956 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
957 | _rl_last_c_pos = _rl_col_width (&visible_line[pos], 0, nleft); | |
958 | else | |
959 | _rl_last_c_pos = nleft; | |
726f6388 JA |
960 | } |
961 | ||
7117c2d2 JA |
962 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
963 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
964 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
965 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
966 | } | |
967 | } | |
968 | else /* Do horizontal scrolling. */ | |
969 | { | |
970 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
971 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
972 | ||
973 | /* Always at top line. */ | |
974 | _rl_last_v_pos = 0; | |
975 | ||
976 | /* Compute where in the buffer the displayed line should start. This | |
977 | will be LMARGIN. */ | |
978 | ||
979 | /* The number of characters that will be displayed before the cursor. */ | |
980 | ndisp = c_pos - wrap_offset; | |
28ef6c31 | 981 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 982 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 983 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
726f6388 | 984 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 985 | t = _rl_screenwidth / 3; |
726f6388 JA |
986 | |
987 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 988 | last_lmargin will be > 0. */ |
726f6388 JA |
989 | |
990 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
991 | width, compute the starting offset so that the cursor is about |
992 | two-thirds of the way across the screen. */ | |
28ef6c31 | 993 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 JA |
994 | { |
995 | lmargin = c_pos - (2 * t); | |
996 | if (lmargin < 0) | |
997 | lmargin = 0; | |
998 | /* If the left margin would be in the middle of a prompt with | |
999 | invisible characters, don't display the prompt at all. */ | |
1000 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1001 | lmargin = nleft; | |
1002 | } | |
28ef6c31 | 1003 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1004 | lmargin = 0; |
726f6388 JA |
1005 | else if (phys_c_pos < 1) |
1006 | { | |
1007 | /* If we are moving back towards the beginning of the line and | |
1008 | the last margin is no longer correct, compute a new one. */ | |
1009 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ | |
1010 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1011 | lmargin = nleft; | |
1012 | } | |
1013 | else | |
b72432fd | 1014 | lmargin = last_lmargin; |
726f6388 JA |
1015 | |
1016 | /* If the first character on the screen isn't the first character | |
1017 | in the display line, indicate this with a special character. */ | |
1018 | if (lmargin > 0) | |
1019 | line[lmargin] = '<'; | |
1020 | ||
1021 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1022 | the whole line, indicate that with a special character at the |
1023 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1024 | wrap offset into account. */ | |
28ef6c31 | 1025 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1026 | if (t < out) |
b72432fd | 1027 | line[t - 1] = '>'; |
726f6388 JA |
1028 | |
1029 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
1030 | { | |
1031 | forced_display = 0; | |
1032 | update_line (&visible_line[last_lmargin], | |
1033 | &invisible_line[lmargin], | |
1034 | 0, | |
28ef6c31 JA |
1035 | _rl_screenwidth + visible_wrap_offset, |
1036 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1037 | 0); |
1038 | ||
1039 | /* If the visible new line is shorter than the old, but the number | |
1040 | of invisible characters is greater, and we are at the end of | |
1041 | the new line, we need to clear to eol. */ | |
1042 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1043 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1044 | (_rl_last_c_pos == out) && | |
1045 | t < visible_first_line_len) | |
1046 | { | |
28ef6c31 | 1047 | nleft = _rl_screenwidth - t; |
d166f048 | 1048 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1049 | } |
1050 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1051 | if (visible_first_line_len > _rl_screenwidth) |
1052 | visible_first_line_len = _rl_screenwidth; | |
726f6388 JA |
1053 | |
1054 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); | |
1055 | last_lmargin = lmargin; | |
1056 | } | |
1057 | } | |
1058 | fflush (rl_outstream); | |
1059 | ||
1060 | /* Swap visible and non-visible lines. */ | |
1061 | { | |
28ef6c31 | 1062 | char *vtemp = visible_line; |
bb70624e JA |
1063 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
1064 | ||
726f6388 | 1065 | visible_line = invisible_line; |
28ef6c31 | 1066 | invisible_line = vtemp; |
bb70624e | 1067 | |
ccc6cda3 JA |
1068 | vis_lbreaks = inv_lbreaks; |
1069 | inv_lbreaks = itemp; | |
bb70624e JA |
1070 | |
1071 | vis_lbsize = inv_lbsize; | |
1072 | inv_lbsize = ntemp; | |
1073 | ||
726f6388 JA |
1074 | rl_display_fixed = 0; |
1075 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1076 | are not displaying any invisible characters, so set visible_wrap_offset | |
1077 | to 0. */ | |
1078 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1079 | visible_wrap_offset = 0; | |
1080 | else | |
1081 | visible_wrap_offset = wrap_offset; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | /* PWP: update_line() is based on finding the middle difference of each | |
1086 | line on the screen; vis: | |
1087 | ||
1088 | /old first difference | |
1089 | /beginning of line | /old last same /old EOL | |
1090 | v v v v | |
1091 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1092 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1093 | ^ ^ ^ ^ | |
1094 | \beginning of line | \new last same \new end of line | |
1095 | \new first difference | |
1096 | ||
1097 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1098 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1099 | |
1100 | Could be made even smarter, but this works well enough */ | |
1101 | static void | |
1102 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1103 | register char *old, *new; | |
ccc6cda3 | 1104 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1105 | { |
1106 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
1107 | int temp, lendiff, wsatend, od, nd; | |
ccc6cda3 | 1108 | int current_invis_chars; |
7117c2d2 JA |
1109 | int col_lendiff, col_temp; |
1110 | #if defined (HANDLE_MULTIBYTE) | |
1111 | mbstate_t ps_new, ps_old; | |
1112 | int new_offset, old_offset, tmp; | |
1113 | #endif | |
726f6388 JA |
1114 | |
1115 | /* If we're at the right edge of a terminal that supports xn, we're | |
1116 | ready to wrap around, so do so. This fixes problems with knowing | |
1117 | the exact cursor position and cut-and-paste with certain terminal | |
1118 | emulators. In this calculation, TEMP is the physical screen | |
1119 | position of the cursor. */ | |
1120 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
28ef6c31 | 1121 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1122 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1123 | { |
7117c2d2 JA |
1124 | #if defined (HANDLE_MULTIBYTE) |
1125 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1126 | { | |
1127 | wchar_t wc; | |
1128 | mbstate_t ps; | |
1129 | int tempwidth, bytes; | |
1130 | size_t ret; | |
1131 | ||
1132 | /* This fixes only double-column characters, but if the wrapped | |
1133 | character comsumes more than three columns, spaces will be | |
1134 | inserted in the string buffer. */ | |
1135 | if (_rl_wrapped_line[current_line] > 0) | |
1136 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); | |
1137 | ||
1138 | memset (&ps, 0, sizeof (mbstate_t)); | |
1139 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
b80f6443 | 1140 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1141 | { |
1142 | tempwidth = 1; | |
1143 | ret = 1; | |
1144 | } | |
b80f6443 | 1145 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1146 | tempwidth = 0; |
1147 | else | |
1148 | tempwidth = wcwidth (wc); | |
1149 | ||
1150 | if (tempwidth > 0) | |
1151 | { | |
1152 | int count; | |
1153 | bytes = ret; | |
1154 | for (count = 0; count < bytes; count++) | |
1155 | putc (new[count], rl_outstream); | |
1156 | _rl_last_c_pos = tempwidth; | |
1157 | _rl_last_v_pos++; | |
1158 | memset (&ps, 0, sizeof (mbstate_t)); | |
1159 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1160 | if (ret != 0 && bytes != 0) | |
1161 | { | |
b80f6443 | 1162 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1163 | memmove (old+bytes, old+1, strlen (old+1)); |
1164 | else | |
1165 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1166 | memcpy (old, new, bytes); | |
1167 | } | |
1168 | } | |
1169 | else | |
1170 | { | |
1171 | putc (' ', rl_outstream); | |
1172 | _rl_last_c_pos = 1; | |
1173 | _rl_last_v_pos++; | |
1174 | if (old[0] && new[0]) | |
1175 | old[0] = new[0]; | |
1176 | } | |
1177 | } | |
726f6388 | 1178 | else |
7117c2d2 JA |
1179 | #endif |
1180 | { | |
1181 | if (new[0]) | |
1182 | putc (new[0], rl_outstream); | |
1183 | else | |
1184 | putc (' ', rl_outstream); | |
1185 | _rl_last_c_pos = 1; /* XXX */ | |
1186 | _rl_last_v_pos++; | |
1187 | if (old[0] && new[0]) | |
1188 | old[0] = new[0]; | |
1189 | } | |
726f6388 | 1190 | } |
7117c2d2 | 1191 | |
726f6388 JA |
1192 | |
1193 | /* Find first difference. */ | |
7117c2d2 JA |
1194 | #if defined (HANDLE_MULTIBYTE) |
1195 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1196 | { | |
b80f6443 JA |
1197 | /* See if the old line is a subset of the new line, so that the |
1198 | only change is adding characters. */ | |
1199 | temp = (omax < nmax) ? omax : nmax; | |
1200 | if (memcmp (old, new, temp) == 0) | |
7117c2d2 | 1201 | { |
b80f6443 JA |
1202 | ofd = old + temp; |
1203 | nfd = new + temp; | |
1204 | } | |
1205 | else | |
1206 | { | |
1207 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1208 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1209 | ||
1210 | if (omax == nmax && STREQN (new, old, omax)) | |
1211 | { | |
1212 | ofd = old + omax; | |
1213 | nfd = new + nmax; | |
1214 | } | |
1215 | else | |
1216 | { | |
1217 | new_offset = old_offset = 0; | |
1218 | for (ofd = old, nfd = new; | |
1219 | (ofd - old < omax) && *ofd && | |
1220 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1221 | { | |
1222 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1223 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1224 | ofd = old + old_offset; | |
1225 | nfd = new + new_offset; | |
1226 | } | |
1227 | } | |
7117c2d2 JA |
1228 | } |
1229 | } | |
1230 | else | |
1231 | #endif | |
726f6388 JA |
1232 | for (ofd = old, nfd = new; |
1233 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1234 | ofd++, nfd++) | |
1235 | ; | |
1236 | ||
1237 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1238 | of the distance between ne and new and oe and old, respectively, to | |
1239 | move a subtraction out of each loop. */ | |
1240 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1241 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1242 | ||
1243 | /* If no difference, continue to next line. */ | |
1244 | if (ofd == oe && nfd == ne) | |
1245 | return; | |
1246 | ||
1247 | wsatend = 1; /* flag for trailing whitespace */ | |
7117c2d2 JA |
1248 | |
1249 | #if defined (HANDLE_MULTIBYTE) | |
1250 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1251 | { | |
1252 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1253 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1254 | while ((ols > ofd) && (nls > nfd)) | |
1255 | { | |
1256 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1257 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1258 | ||
b80f6443 JA |
1259 | #if 0 |
1260 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1261 | _rl_adjust_point (old, ols - old, &ps_old); |
1262 | _rl_adjust_point (new, nls - new, &ps_new); | |
b80f6443 | 1263 | #endif |
7117c2d2 JA |
1264 | |
1265 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1266 | break; | |
1267 | ||
1268 | if (*ols == ' ') | |
1269 | wsatend = 0; | |
1270 | ||
1271 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1272 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1273 | } | |
1274 | } | |
1275 | else | |
1276 | { | |
1277 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1278 | ols = oe - 1; /* find last same */ |
1279 | nls = ne - 1; | |
1280 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1281 | { | |
1282 | if (*ols != ' ') | |
1283 | wsatend = 0; | |
1284 | ols--; | |
1285 | nls--; | |
1286 | } | |
7117c2d2 JA |
1287 | #if defined (HANDLE_MULTIBYTE) |
1288 | } | |
1289 | #endif | |
726f6388 JA |
1290 | |
1291 | if (wsatend) | |
1292 | { | |
1293 | ols = oe; | |
1294 | nls = ne; | |
1295 | } | |
7117c2d2 JA |
1296 | #if defined (HANDLE_MULTIBYTE) |
1297 | /* This may not work for stateful encoding, but who cares? To handle | |
1298 | stateful encoding properly, we have to scan each string from the | |
1299 | beginning and compare. */ | |
1300 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1301 | #else | |
726f6388 | 1302 | else if (*ols != *nls) |
7117c2d2 | 1303 | #endif |
726f6388 JA |
1304 | { |
1305 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 JA |
1306 | { |
1307 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1308 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1309 | else | |
1310 | ols++; | |
1311 | } | |
726f6388 | 1312 | if (*nls) |
7117c2d2 JA |
1313 | { |
1314 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1315 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1316 | else | |
1317 | nls++; | |
1318 | } | |
726f6388 JA |
1319 | } |
1320 | ||
ccc6cda3 JA |
1321 | /* count of invisible characters in the current invisible line. */ |
1322 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1323 | if (_rl_last_v_pos != current_line) | |
1324 | { | |
1325 | _rl_move_vert (current_line); | |
1326 | if (current_line == 0 && visible_wrap_offset) | |
1327 | _rl_last_c_pos += visible_wrap_offset; | |
1328 | } | |
726f6388 JA |
1329 | |
1330 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1331 | prompt string, and the prompt string has not changed, and the current |
1332 | cursor position is before the last invisible character in the prompt, | |
1333 | and the index of the character to move to is past the end of the prompt | |
1334 | string, then redraw the entire prompt string. We can only do this | |
1335 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1336 | |
ccc6cda3 JA |
1337 | This is not an efficiency hack -- there is a problem with redrawing |
1338 | portions of the prompt string if they contain terminal escape | |
1339 | sequences (like drawing the `unbold' sequence without a corresponding | |
1340 | `bold') that manifests itself on certain terminals. */ | |
726f6388 JA |
1341 | |
1342 | lendiff = local_prompt ? strlen (local_prompt) : 0; | |
ccc6cda3 | 1343 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 1344 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 JA |
1345 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
1346 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) | |
726f6388 | 1347 | { |
bb70624e JA |
1348 | #if defined (__MSDOS__) |
1349 | putc ('\r', rl_outstream); | |
1350 | #else | |
28ef6c31 | 1351 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1352 | #endif |
726f6388 | 1353 | _rl_output_some_chars (local_prompt, lendiff); |
7117c2d2 JA |
1354 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1355 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff); | |
1356 | else | |
1357 | _rl_last_c_pos = lendiff; | |
726f6388 JA |
1358 | } |
1359 | ||
ccc6cda3 | 1360 | _rl_move_cursor_relative (od, old); |
726f6388 | 1361 | |
7117c2d2 JA |
1362 | /* if (len (new) > len (old)) |
1363 | lendiff == difference in buffer | |
1364 | col_lendiff == difference on screen | |
1365 | When not using multibyte characters, these are equal */ | |
726f6388 | 1366 | lendiff = (nls - nfd) - (ols - ofd); |
7117c2d2 JA |
1367 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1368 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1369 | else | |
1370 | col_lendiff = lendiff; | |
726f6388 | 1371 | |
ccc6cda3 JA |
1372 | /* If we are changing the number of invisible characters in a line, and |
1373 | the spot of first difference is before the end of the invisible chars, | |
1374 | lendiff needs to be adjusted. */ | |
1375 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1376 | current_invis_chars != visible_wrap_offset) | |
7117c2d2 JA |
1377 | { |
1378 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1379 | { | |
1380 | lendiff += visible_wrap_offset - current_invis_chars; | |
1381 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1382 | } | |
1383 | else | |
1384 | { | |
1385 | lendiff += visible_wrap_offset - current_invis_chars; | |
1386 | col_lendiff = lendiff; | |
1387 | } | |
1388 | } | |
ccc6cda3 | 1389 | |
726f6388 JA |
1390 | /* Insert (diff (len (old), len (new)) ch. */ |
1391 | temp = ne - nfd; | |
7117c2d2 JA |
1392 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1393 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1394 | else | |
1395 | col_temp = temp; | |
1396 | ||
1397 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
726f6388 JA |
1398 | { |
1399 | /* Non-zero if we're increasing the number of lines. */ | |
1400 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1401 | /* Sometimes it is cheaper to print the characters rather than | |
1402 | use the terminal's capabilities. If we're growing the number | |
1403 | of lines, make sure we actually cause the new line to wrap | |
1404 | around on auto-wrapping terminals. */ | |
7117c2d2 | 1405 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1406 | { |
28ef6c31 | 1407 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1408 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1409 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 JA |
1410 | invisible characters. We need to just draw them. */ |
1411 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
28ef6c31 | 1412 | lendiff <= prompt_visible_length || !current_invis_chars)) |
726f6388 | 1413 | { |
7117c2d2 JA |
1414 | insert_some_chars (nfd, lendiff, col_lendiff); |
1415 | _rl_last_c_pos += col_lendiff; | |
726f6388 | 1416 | } |
b80f6443 | 1417 | else if (*ols == 0 && lendiff > 0) |
726f6388 JA |
1418 | { |
1419 | /* At the end of a line the characters do not have to | |
1420 | be "inserted". They can just be placed on the screen. */ | |
ccc6cda3 | 1421 | /* However, this screws up the rest of this block, which |
b72432fd | 1422 | assumes you've done the insert because you can. */ |
726f6388 | 1423 | _rl_output_some_chars (nfd, lendiff); |
7117c2d2 | 1424 | _rl_last_c_pos += col_lendiff; |
726f6388 | 1425 | } |
ccc6cda3 JA |
1426 | else |
1427 | { | |
1428 | /* We have horizontal scrolling and we are not inserting at | |
1429 | the end. We have invisible characters in this line. This | |
1430 | is a dumb update. */ | |
1431 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1432 | _rl_last_c_pos += col_temp; |
ccc6cda3 JA |
1433 | return; |
1434 | } | |
726f6388 JA |
1435 | /* Copy (new) chars to screen from first diff to last match. */ |
1436 | temp = nls - nfd; | |
1437 | if ((temp - lendiff) > 0) | |
1438 | { | |
1439 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
b80f6443 JA |
1440 | #if 1 |
1441 | /* XXX -- this bears closer inspection. Fixes a redisplay bug | |
1442 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1443 | multibyte characters and prompt strings with invisible | |
1444 | characters, but was previously disabled. */ | |
7117c2d2 | 1445 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); |
b80f6443 JA |
1446 | #else |
1447 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff); | |
7117c2d2 | 1448 | #endif |
726f6388 JA |
1449 | } |
1450 | } | |
1451 | else | |
1452 | { | |
1453 | /* cannot insert chars, write to EOL */ | |
1454 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1455 | _rl_last_c_pos += col_temp; |
726f6388 JA |
1456 | } |
1457 | } | |
1458 | else /* Delete characters from line. */ | |
1459 | { | |
1460 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1461 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1462 | { |
1463 | /* If all we're doing is erasing the invisible characters in the | |
1464 | prompt string, don't bother. It screws up the assumptions | |
1465 | about what's on the screen. */ | |
1466 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1467 | -lendiff == visible_wrap_offset) | |
7117c2d2 | 1468 | col_lendiff = 0; |
726f6388 | 1469 | |
7117c2d2 JA |
1470 | if (col_lendiff) |
1471 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 JA |
1472 | |
1473 | /* Copy (new) chars to screen from first diff to last match */ | |
1474 | temp = nls - nfd; | |
1475 | if (temp > 0) | |
1476 | { | |
1477 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1478 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp);; |
726f6388 JA |
1479 | } |
1480 | } | |
1481 | /* Otherwise, print over the existing material. */ | |
1482 | else | |
1483 | { | |
1484 | if (temp > 0) | |
1485 | { | |
1486 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1487 | _rl_last_c_pos += col_temp; |
726f6388 JA |
1488 | } |
1489 | lendiff = (oe - old) - (ne - new); | |
7117c2d2 JA |
1490 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1491 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1492 | else | |
1493 | col_lendiff = lendiff; | |
1494 | ||
1495 | if (col_lendiff) | |
b72432fd JA |
1496 | { |
1497 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 1498 | space_to_eol (col_lendiff); |
b72432fd | 1499 | else |
7117c2d2 | 1500 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 1501 | } |
726f6388 JA |
1502 | } |
1503 | } | |
1504 | } | |
1505 | ||
1506 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1507 | int |
726f6388 JA |
1508 | rl_on_new_line () |
1509 | { | |
1510 | if (visible_line) | |
1511 | visible_line[0] = '\0'; | |
1512 | ||
1513 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1514 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1515 | if (vis_lbreaks) |
1516 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1517 | visible_wrap_offset = 0; | |
726f6388 JA |
1518 | return 0; |
1519 | } | |
1520 | ||
bb70624e JA |
1521 | /* Tell the update routines that we have moved onto a new line with the |
1522 | prompt already displayed. Code originally from the version of readline | |
b80f6443 JA |
1523 | distributed with CLISP. rl_expand_prompt must have already been called |
1524 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
1525 | int |
1526 | rl_on_new_line_with_prompt () | |
1527 | { | |
1528 | int prompt_size, i, l, real_screenwidth, newlines; | |
b80f6443 | 1529 | char *prompt_last_line, *lprompt; |
bb70624e JA |
1530 | |
1531 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1532 | the already-displayed prompt. */ | |
1533 | prompt_size = strlen (rl_prompt) + 1; | |
1534 | init_line_structures (prompt_size); | |
1535 | ||
1536 | /* Make sure the line structures hold the already-displayed prompt for | |
1537 | redisplay. */ | |
b80f6443 JA |
1538 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1539 | strcpy (visible_line, lprompt); | |
1540 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
1541 | |
1542 | /* If the prompt contains newlines, take the last tail. */ | |
1543 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1544 | if (!prompt_last_line) | |
1545 | prompt_last_line = rl_prompt; | |
1546 | ||
1547 | l = strlen (prompt_last_line); | |
7117c2d2 JA |
1548 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1549 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); | |
1550 | else | |
1551 | _rl_last_c_pos = l; | |
bb70624e JA |
1552 | |
1553 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1554 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1555 | one less, see terminal.c. */ | |
28ef6c31 | 1556 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1557 | _rl_last_v_pos = l / real_screenwidth; |
1558 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1559 | whether the cursor is at the end of the last line, or already at the | |
1560 | beginning of the next line. Output a newline just to be safe. */ | |
1561 | if (l > 0 && (l % real_screenwidth) == 0) | |
1562 | _rl_output_some_chars ("\n", 1); | |
1563 | last_lmargin = 0; | |
1564 | ||
1565 | newlines = 0; i = 0; | |
1566 | while (i <= l) | |
1567 | { | |
1568 | _rl_vis_botlin = newlines; | |
1569 | vis_lbreaks[newlines++] = i; | |
1570 | i += real_screenwidth; | |
1571 | } | |
1572 | vis_lbreaks[newlines] = l; | |
1573 | visible_wrap_offset = 0; | |
1574 | ||
b80f6443 JA |
1575 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1576 | ||
bb70624e JA |
1577 | return 0; |
1578 | } | |
1579 | ||
726f6388 | 1580 | /* Actually update the display, period. */ |
ccc6cda3 | 1581 | int |
726f6388 JA |
1582 | rl_forced_update_display () |
1583 | { | |
1584 | if (visible_line) | |
1585 | { | |
1586 | register char *temp = visible_line; | |
1587 | ||
ccc6cda3 | 1588 | while (*temp) |
b72432fd | 1589 | *temp++ = '\0'; |
726f6388 JA |
1590 | } |
1591 | rl_on_new_line (); | |
1592 | forced_display++; | |
ccc6cda3 | 1593 | (*rl_redisplay_function) (); |
726f6388 JA |
1594 | return 0; |
1595 | } | |
1596 | ||
1597 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
1598 | DATA is the contents of the screen line of interest; i.e., where | |
1599 | the movement is being done. */ | |
1600 | void | |
1601 | _rl_move_cursor_relative (new, data) | |
1602 | int new; | |
28ef6c31 | 1603 | const char *data; |
726f6388 JA |
1604 | { |
1605 | register int i; | |
1606 | ||
1607 | /* If we don't have to do anything, then return. */ | |
7117c2d2 JA |
1608 | #if defined (HANDLE_MULTIBYTE) |
1609 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1610 | a multibyte string, but _rl_last_c_pos is the display position. In | |
b80f6443 JA |
1611 | this case, NEW's display position is not obvious and must be |
1612 | calculated. */ | |
1613 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
1614 | { | |
1615 | if (_rl_last_c_pos == new) | |
1616 | return; | |
1617 | } | |
1618 | else if (_rl_last_c_pos == _rl_col_width (data, 0, new)) | |
1619 | return; | |
7117c2d2 | 1620 | #else |
726f6388 | 1621 | if (_rl_last_c_pos == new) return; |
7117c2d2 | 1622 | #endif |
726f6388 JA |
1623 | |
1624 | /* It may be faster to output a CR, and then move forwards instead | |
1625 | of moving backwards. */ | |
1626 | /* i == current physical cursor position. */ | |
1627 | i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
ccc6cda3 | 1628 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || |
28ef6c31 | 1629 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
1630 | { |
1631 | #if defined (__MSDOS__) | |
1632 | putc ('\r', rl_outstream); | |
1633 | #else | |
28ef6c31 | 1634 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 JA |
1635 | #endif /* !__MSDOS__ */ |
1636 | _rl_last_c_pos = 0; | |
1637 | } | |
1638 | ||
1639 | if (_rl_last_c_pos < new) | |
1640 | { | |
1641 | /* Move the cursor forward. We do it by printing the command | |
1642 | to move the cursor forward if there is one, else print that | |
1643 | portion of the output buffer again. Which is cheaper? */ | |
1644 | ||
1645 | /* The above comment is left here for posterity. It is faster | |
1646 | to print one character (non-control) than to print a control | |
1647 | sequence telling the terminal to move forward one character. | |
1648 | That kind of control is for people who don't know what the | |
1649 | data is underneath the cursor. */ | |
1650 | #if defined (HACK_TERMCAP_MOTION) | |
28ef6c31 | 1651 | if (_rl_term_forward_char) |
7117c2d2 JA |
1652 | { |
1653 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1654 | { | |
1655 | int width; | |
1656 | width = _rl_col_width (data, _rl_last_c_pos, new); | |
1657 | for (i = 0; i < width; i++) | |
1658 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1659 | } | |
1660 | else | |
1661 | { | |
1662 | for (i = _rl_last_c_pos; i < new; i++) | |
1663 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1664 | } | |
1665 | } | |
1666 | else if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1667 | { | |
1668 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1669 | for (i = 0; i < new; i++) | |
1670 | putc (data[i], rl_outstream); | |
1671 | } | |
1672 | else | |
726f6388 | 1673 | for (i = _rl_last_c_pos; i < new; i++) |
7117c2d2 JA |
1674 | putc (data[i], rl_outstream); |
1675 | ||
1676 | #else /* !HACK_TERMCAP_MOTION */ | |
1677 | ||
1678 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1679 | { | |
1680 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1681 | for (i = 0; i < new; i++) | |
1682 | putc (data[i], rl_outstream); | |
1683 | } | |
726f6388 JA |
1684 | else |
1685 | for (i = _rl_last_c_pos; i < new; i++) | |
1686 | putc (data[i], rl_outstream); | |
7117c2d2 JA |
1687 | |
1688 | #endif /* !HACK_TERMCAP_MOTION */ | |
1689 | ||
726f6388 | 1690 | } |
7117c2d2 JA |
1691 | #if defined (HANDLE_MULTIBYTE) |
1692 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1693 | The byte length of the string is probably bigger than the column width | |
1694 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1695 | display point is less than _rl_last_c_pos. */ | |
1696 | else if (_rl_last_c_pos >= new) | |
1697 | #else | |
b72432fd | 1698 | else if (_rl_last_c_pos > new) |
7117c2d2 JA |
1699 | #endif |
1700 | { | |
1701 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
b80f6443 | 1702 | _rl_backspace (_rl_last_c_pos - _rl_col_width (data, 0, new)); |
7117c2d2 JA |
1703 | else |
1704 | _rl_backspace (_rl_last_c_pos - new); | |
1705 | } | |
1706 | ||
1707 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1708 | _rl_last_c_pos = _rl_col_width (data, 0, new); | |
1709 | else | |
1710 | _rl_last_c_pos = new; | |
726f6388 JA |
1711 | } |
1712 | ||
1713 | /* PWP: move the cursor up or down. */ | |
1714 | void | |
1715 | _rl_move_vert (to) | |
1716 | int to; | |
1717 | { | |
1718 | register int delta, i; | |
1719 | ||
28ef6c31 | 1720 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
1721 | return; |
1722 | ||
726f6388 JA |
1723 | if ((delta = to - _rl_last_v_pos) > 0) |
1724 | { | |
1725 | for (i = 0; i < delta; i++) | |
1726 | putc ('\n', rl_outstream); | |
bb70624e JA |
1727 | #if defined (__MSDOS__) |
1728 | putc ('\r', rl_outstream); | |
1729 | #else | |
28ef6c31 | 1730 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1731 | #endif |
726f6388 JA |
1732 | _rl_last_c_pos = 0; |
1733 | } | |
1734 | else | |
1735 | { /* delta < 0 */ | |
28ef6c31 | 1736 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 1737 | for (i = 0; i < -delta; i++) |
28ef6c31 | 1738 | tputs (_rl_term_up, 1, _rl_output_character_function); |
726f6388 | 1739 | } |
bb70624e | 1740 | |
726f6388 JA |
1741 | _rl_last_v_pos = to; /* Now TO is here */ |
1742 | } | |
1743 | ||
1744 | /* Physically print C on rl_outstream. This is for functions which know | |
1745 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 1746 | int |
726f6388 JA |
1747 | rl_show_char (c) |
1748 | int c; | |
1749 | { | |
1750 | int n = 1; | |
1751 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1752 | { | |
1753 | fprintf (rl_outstream, "M-"); | |
1754 | n += 2; | |
1755 | c = UNMETA (c); | |
1756 | } | |
1757 | ||
1758 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 1759 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 1760 | #else |
ccc6cda3 | 1761 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
1762 | #endif /* !DISPLAY_TABS */ |
1763 | { | |
1764 | fprintf (rl_outstream, "C-"); | |
1765 | n += 2; | |
ccc6cda3 | 1766 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
1767 | } |
1768 | ||
1769 | putc (c, rl_outstream); | |
1770 | fflush (rl_outstream); | |
1771 | return n; | |
1772 | } | |
1773 | ||
1774 | int | |
1775 | rl_character_len (c, pos) | |
1776 | register int c, pos; | |
1777 | { | |
1778 | unsigned char uc; | |
1779 | ||
1780 | uc = (unsigned char)c; | |
1781 | ||
1782 | if (META_CHAR (uc)) | |
1783 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1784 | ||
1785 | if (uc == '\t') | |
1786 | { | |
1787 | #if defined (DISPLAY_TABS) | |
1788 | return (((pos | 7) + 1) - pos); | |
1789 | #else | |
1790 | return (2); | |
1791 | #endif /* !DISPLAY_TABS */ | |
1792 | } | |
1793 | ||
ccc6cda3 JA |
1794 | if (CTRL_CHAR (c) || c == RUBOUT) |
1795 | return (2); | |
1796 | ||
f73dda09 | 1797 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 JA |
1798 | } |
1799 | ||
1800 | /* How to print things in the "echo-area". The prompt is treated as a | |
1801 | mini-modeline. */ | |
1802 | ||
ccc6cda3 JA |
1803 | #if defined (USE_VARARGS) |
1804 | int | |
1805 | #if defined (PREFER_STDARG) | |
1806 | rl_message (const char *format, ...) | |
1807 | #else | |
726f6388 JA |
1808 | rl_message (va_alist) |
1809 | va_dcl | |
ccc6cda3 | 1810 | #endif |
726f6388 | 1811 | { |
726f6388 | 1812 | va_list args; |
ccc6cda3 JA |
1813 | #if defined (PREFER_VARARGS) |
1814 | char *format; | |
1815 | #endif | |
726f6388 | 1816 | |
ccc6cda3 JA |
1817 | #if defined (PREFER_STDARG) |
1818 | va_start (args, format); | |
1819 | #else | |
726f6388 JA |
1820 | va_start (args); |
1821 | format = va_arg (args, char *); | |
ccc6cda3 JA |
1822 | #endif |
1823 | ||
f73dda09 JA |
1824 | #if defined (HAVE_VSNPRINTF) |
1825 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
1826 | #else | |
726f6388 | 1827 | vsprintf (msg_buf, format, args); |
f73dda09 JA |
1828 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1829 | #endif | |
726f6388 JA |
1830 | va_end (args); |
1831 | ||
1832 | rl_display_prompt = msg_buf; | |
ccc6cda3 | 1833 | (*rl_redisplay_function) (); |
726f6388 JA |
1834 | return 0; |
1835 | } | |
ccc6cda3 JA |
1836 | #else /* !USE_VARARGS */ |
1837 | int | |
726f6388 JA |
1838 | rl_message (format, arg1, arg2) |
1839 | char *format; | |
1840 | { | |
1841 | sprintf (msg_buf, format, arg1, arg2); | |
f73dda09 | 1842 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
726f6388 | 1843 | rl_display_prompt = msg_buf; |
ccc6cda3 | 1844 | (*rl_redisplay_function) (); |
726f6388 JA |
1845 | return 0; |
1846 | } | |
ccc6cda3 | 1847 | #endif /* !USE_VARARGS */ |
726f6388 JA |
1848 | |
1849 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 1850 | int |
726f6388 JA |
1851 | rl_clear_message () |
1852 | { | |
1853 | rl_display_prompt = rl_prompt; | |
ccc6cda3 | 1854 | (*rl_redisplay_function) (); |
726f6388 JA |
1855 | return 0; |
1856 | } | |
1857 | ||
ccc6cda3 | 1858 | int |
726f6388 JA |
1859 | rl_reset_line_state () |
1860 | { | |
1861 | rl_on_new_line (); | |
1862 | ||
1863 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
1864 | forced_display = 1; | |
1865 | return 0; | |
1866 | } | |
1867 | ||
b80f6443 JA |
1868 | /* These are getting numerous enough that it's time to create a struct. */ |
1869 | ||
ccc6cda3 JA |
1870 | static char *saved_local_prompt; |
1871 | static char *saved_local_prefix; | |
1872 | static int saved_last_invisible; | |
1873 | static int saved_visible_length; | |
b80f6443 JA |
1874 | static int saved_invis_chars_first_line; |
1875 | static int saved_physical_chars; | |
ccc6cda3 JA |
1876 | |
1877 | void | |
b72432fd | 1878 | rl_save_prompt () |
ccc6cda3 JA |
1879 | { |
1880 | saved_local_prompt = local_prompt; | |
1881 | saved_local_prefix = local_prompt_prefix; | |
28ef6c31 JA |
1882 | saved_last_invisible = prompt_last_invisible; |
1883 | saved_visible_length = prompt_visible_length; | |
b80f6443 JA |
1884 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
1885 | saved_physical_chars = prompt_physical_chars; | |
ccc6cda3 JA |
1886 | |
1887 | local_prompt = local_prompt_prefix = (char *)0; | |
28ef6c31 | 1888 | prompt_last_invisible = prompt_visible_length = 0; |
b80f6443 | 1889 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
1890 | } |
1891 | ||
1892 | void | |
b72432fd | 1893 | rl_restore_prompt () |
ccc6cda3 | 1894 | { |
28ef6c31 JA |
1895 | FREE (local_prompt); |
1896 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
1897 | |
1898 | local_prompt = saved_local_prompt; | |
1899 | local_prompt_prefix = saved_local_prefix; | |
28ef6c31 JA |
1900 | prompt_last_invisible = saved_last_invisible; |
1901 | prompt_visible_length = saved_visible_length; | |
b80f6443 JA |
1902 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
1903 | prompt_physical_chars = saved_physical_chars; | |
ccc6cda3 JA |
1904 | } |
1905 | ||
1906 | char * | |
1907 | _rl_make_prompt_for_search (pchar) | |
1908 | int pchar; | |
1909 | { | |
1910 | int len; | |
1911 | char *pmt; | |
1912 | ||
b72432fd | 1913 | rl_save_prompt (); |
ccc6cda3 JA |
1914 | |
1915 | if (saved_local_prompt == 0) | |
1916 | { | |
1917 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
f73dda09 | 1918 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 1919 | if (len) |
b72432fd | 1920 | strcpy (pmt, rl_prompt); |
ccc6cda3 JA |
1921 | pmt[len] = pchar; |
1922 | pmt[len+1] = '\0'; | |
1923 | } | |
1924 | else | |
1925 | { | |
1926 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; | |
f73dda09 | 1927 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 1928 | if (len) |
b72432fd | 1929 | strcpy (pmt, saved_local_prompt); |
ccc6cda3 JA |
1930 | pmt[len] = pchar; |
1931 | pmt[len+1] = '\0'; | |
1932 | local_prompt = savestring (pmt); | |
28ef6c31 JA |
1933 | prompt_last_invisible = saved_last_invisible; |
1934 | prompt_visible_length = saved_visible_length + 1; | |
ccc6cda3 | 1935 | } |
b80f6443 | 1936 | |
ccc6cda3 JA |
1937 | return pmt; |
1938 | } | |
1939 | ||
726f6388 JA |
1940 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
1941 | void | |
1942 | _rl_erase_at_end_of_line (l) | |
1943 | int l; | |
1944 | { | |
1945 | register int i; | |
1946 | ||
ccc6cda3 | 1947 | _rl_backspace (l); |
726f6388 JA |
1948 | for (i = 0; i < l; i++) |
1949 | putc (' ', rl_outstream); | |
ccc6cda3 | 1950 | _rl_backspace (l); |
726f6388 JA |
1951 | for (i = 0; i < l; i++) |
1952 | visible_line[--_rl_last_c_pos] = '\0'; | |
1953 | rl_display_fixed++; | |
1954 | } | |
1955 | ||
1956 | /* Clear to the end of the line. COUNT is the minimum | |
1957 | number of character spaces to clear, */ | |
d166f048 JA |
1958 | void |
1959 | _rl_clear_to_eol (count) | |
726f6388 JA |
1960 | int count; |
1961 | { | |
28ef6c31 JA |
1962 | if (_rl_term_clreol) |
1963 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d166f048 | 1964 | else if (count) |
726f6388 JA |
1965 | space_to_eol (count); |
1966 | } | |
1967 | ||
1968 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
1969 | number of character spaces to clear, */ | |
1970 | static void | |
1971 | space_to_eol (count) | |
1972 | int count; | |
1973 | { | |
1974 | register int i; | |
1975 | ||
1976 | for (i = 0; i < count; i++) | |
1977 | putc (' ', rl_outstream); | |
1978 | ||
1979 | _rl_last_c_pos += count; | |
1980 | } | |
1981 | ||
d166f048 JA |
1982 | void |
1983 | _rl_clear_screen () | |
1984 | { | |
28ef6c31 JA |
1985 | if (_rl_term_clrpag) |
1986 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 1987 | else |
28ef6c31 | 1988 | rl_crlf (); |
d166f048 JA |
1989 | } |
1990 | ||
7117c2d2 | 1991 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 1992 | static void |
7117c2d2 | 1993 | insert_some_chars (string, count, col) |
726f6388 | 1994 | char *string; |
7117c2d2 | 1995 | int count, col; |
726f6388 | 1996 | { |
7117c2d2 JA |
1997 | /* DEBUGGING */ |
1998 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
1999 | if (count != col) | |
2000 | fprintf(stderr, "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); | |
2001 | ||
726f6388 | 2002 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2003 | if (_rl_term_IC) |
726f6388 | 2004 | { |
ccc6cda3 | 2005 | char *buffer; |
7117c2d2 JA |
2006 | |
2007 | buffer = tgoto (_rl_term_IC, 0, col); | |
726f6388 JA |
2008 | tputs (buffer, 1, _rl_output_character_function); |
2009 | _rl_output_some_chars (string, count); | |
2010 | } | |
2011 | else | |
2012 | { | |
2013 | register int i; | |
2014 | ||
2015 | /* If we have to turn on insert-mode, then do so. */ | |
28ef6c31 JA |
2016 | if (_rl_term_im && *_rl_term_im) |
2017 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
726f6388 JA |
2018 | |
2019 | /* If there is a special command for inserting characters, then | |
2020 | use that first to open up the space. */ | |
28ef6c31 | 2021 | if (_rl_term_ic && *_rl_term_ic) |
726f6388 | 2022 | { |
7117c2d2 | 2023 | for (i = col; i--; ) |
28ef6c31 | 2024 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
726f6388 JA |
2025 | } |
2026 | ||
2027 | /* Print the text. */ | |
2028 | _rl_output_some_chars (string, count); | |
2029 | ||
2030 | /* If there is a string to turn off insert mode, we had best use | |
2031 | it now. */ | |
28ef6c31 JA |
2032 | if (_rl_term_ei && *_rl_term_ei) |
2033 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
726f6388 | 2034 | } |
726f6388 JA |
2035 | } |
2036 | ||
2037 | /* Delete COUNT characters from the display line. */ | |
2038 | static void | |
2039 | delete_chars (count) | |
2040 | int count; | |
2041 | { | |
28ef6c31 | 2042 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2043 | return; |
2044 | ||
28ef6c31 | 2045 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2046 | { |
ccc6cda3 | 2047 | char *buffer; |
28ef6c31 | 2048 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2049 | tputs (buffer, count, _rl_output_character_function); |
2050 | } | |
2051 | else | |
2052 | { | |
28ef6c31 | 2053 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2054 | while (count--) |
28ef6c31 | 2055 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2056 | } |
726f6388 JA |
2057 | } |
2058 | ||
2059 | void | |
2060 | _rl_update_final () | |
2061 | { | |
2062 | int full_lines; | |
2063 | ||
2064 | full_lines = 0; | |
ccc6cda3 JA |
2065 | /* If the cursor is the only thing on an otherwise-blank last line, |
2066 | compensate so we don't print an extra CRLF. */ | |
2067 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2068 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2069 | { |
2070 | _rl_vis_botlin--; | |
2071 | full_lines = 1; | |
2072 | } | |
2073 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2074 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2075 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2076 | { |
726f6388 | 2077 | char *last_line; |
7117c2d2 | 2078 | |
bb70624e | 2079 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
28ef6c31 | 2080 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
d166f048 | 2081 | _rl_clear_to_eol (0); |
28ef6c31 | 2082 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2083 | } |
2084 | _rl_vis_botlin = 0; | |
28ef6c31 | 2085 | rl_crlf (); |
726f6388 JA |
2086 | fflush (rl_outstream); |
2087 | rl_display_fixed++; | |
2088 | } | |
2089 | ||
2090 | /* Move to the start of the current line. */ | |
2091 | static void | |
2092 | cr () | |
2093 | { | |
28ef6c31 | 2094 | if (_rl_term_cr) |
726f6388 | 2095 | { |
bb70624e JA |
2096 | #if defined (__MSDOS__) |
2097 | putc ('\r', rl_outstream); | |
2098 | #else | |
28ef6c31 | 2099 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2100 | #endif |
726f6388 JA |
2101 | _rl_last_c_pos = 0; |
2102 | } | |
2103 | } | |
2104 | ||
bb70624e JA |
2105 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2106 | terminal escape sequences. Called with the cursor at column 0 of the | |
2107 | line to draw the prompt on. */ | |
2108 | static void | |
2109 | redraw_prompt (t) | |
2110 | char *t; | |
2111 | { | |
2112 | char *oldp, *oldl, *oldlprefix; | |
b80f6443 | 2113 | int oldlen, oldlast, oldplen, oldninvis, oldphyschars; |
bb70624e JA |
2114 | |
2115 | /* Geez, I should make this a struct. */ | |
2116 | oldp = rl_display_prompt; | |
2117 | oldl = local_prompt; | |
2118 | oldlprefix = local_prompt_prefix; | |
28ef6c31 JA |
2119 | oldlen = prompt_visible_length; |
2120 | oldplen = prompt_prefix_length; | |
2121 | oldlast = prompt_last_invisible; | |
2122 | oldninvis = prompt_invis_chars_first_line; | |
b80f6443 | 2123 | oldphyschars = prompt_physical_chars; |
bb70624e JA |
2124 | |
2125 | rl_display_prompt = t; | |
28ef6c31 JA |
2126 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2127 | &prompt_last_invisible, | |
b80f6443 JA |
2128 | &prompt_invis_chars_first_line, |
2129 | &prompt_physical_chars); | |
bb70624e JA |
2130 | local_prompt_prefix = (char *)NULL; |
2131 | rl_forced_update_display (); | |
2132 | ||
2133 | rl_display_prompt = oldp; | |
2134 | local_prompt = oldl; | |
2135 | local_prompt_prefix = oldlprefix; | |
28ef6c31 JA |
2136 | prompt_visible_length = oldlen; |
2137 | prompt_prefix_length = oldplen; | |
2138 | prompt_last_invisible = oldlast; | |
2139 | prompt_invis_chars_first_line = oldninvis; | |
b80f6443 | 2140 | prompt_physical_chars = oldphyschars; |
bb70624e JA |
2141 | } |
2142 | ||
726f6388 JA |
2143 | /* Redisplay the current line after a SIGWINCH is received. */ |
2144 | void | |
2145 | _rl_redisplay_after_sigwinch () | |
2146 | { | |
bb70624e | 2147 | char *t; |
726f6388 JA |
2148 | |
2149 | /* Clear the current line and put the cursor at column 0. Make sure | |
2150 | the right thing happens if we have wrapped to a new screen line. */ | |
28ef6c31 | 2151 | if (_rl_term_cr) |
726f6388 | 2152 | { |
bb70624e JA |
2153 | #if defined (__MSDOS__) |
2154 | putc ('\r', rl_outstream); | |
2155 | #else | |
28ef6c31 | 2156 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2157 | #endif |
726f6388 | 2158 | _rl_last_c_pos = 0; |
bb70624e | 2159 | #if defined (__MSDOS__) |
28ef6c31 | 2160 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2161 | putc ('\r', rl_outstream); |
2162 | #else | |
28ef6c31 JA |
2163 | if (_rl_term_clreol) |
2164 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2165 | else |
2166 | { | |
28ef6c31 JA |
2167 | space_to_eol (_rl_screenwidth); |
2168 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2169 | } |
bb70624e | 2170 | #endif |
726f6388 JA |
2171 | if (_rl_last_v_pos > 0) |
2172 | _rl_move_vert (0); | |
2173 | } | |
2174 | else | |
28ef6c31 | 2175 | rl_crlf (); |
726f6388 JA |
2176 | |
2177 | /* Redraw only the last line of a multi-line prompt. */ | |
2178 | t = strrchr (rl_display_prompt, '\n'); | |
2179 | if (t) | |
bb70624e | 2180 | redraw_prompt (++t); |
726f6388 JA |
2181 | else |
2182 | rl_forced_update_display (); | |
2183 | } | |
ccc6cda3 JA |
2184 | |
2185 | void | |
2186 | _rl_clean_up_for_exit () | |
2187 | { | |
2188 | if (readline_echoing_p) | |
2189 | { | |
2190 | _rl_move_vert (_rl_vis_botlin); | |
2191 | _rl_vis_botlin = 0; | |
2192 | fflush (rl_outstream); | |
b72432fd | 2193 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2194 | } |
2195 | } | |
b72432fd JA |
2196 | |
2197 | void | |
2198 | _rl_erase_entire_line () | |
2199 | { | |
2200 | cr (); | |
2201 | _rl_clear_to_eol (0); | |
2202 | cr (); | |
2203 | fflush (rl_outstream); | |
2204 | } | |
bb70624e JA |
2205 | |
2206 | /* return the `current display line' of the cursor -- the number of lines to | |
2207 | move up to get to the first screen line of the current readline line. */ | |
2208 | int | |
2209 | _rl_current_display_line () | |
2210 | { | |
2211 | int ret, nleft; | |
2212 | ||
2213 | /* Find out whether or not there might be invisible characters in the | |
2214 | editing buffer. */ | |
2215 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2216 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2217 | else |
28ef6c31 | 2218 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2219 | |
2220 | if (nleft > 0) | |
28ef6c31 | 2221 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2222 | else |
2223 | ret = 0; | |
2224 | ||
2225 | return ret; | |
2226 | } | |
7117c2d2 JA |
2227 | |
2228 | #if defined (HANDLE_MULTIBYTE) | |
2229 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2230 | In the case of multibyte characters with stateful encoding, we have to | |
2231 | scan from the beginning of the string to take the state into account. */ | |
2232 | static int | |
2233 | _rl_col_width (str, start, end) | |
b80f6443 | 2234 | const char *str; |
7117c2d2 JA |
2235 | int start, end; |
2236 | { | |
2237 | wchar_t wc; | |
2238 | mbstate_t ps = {0}; | |
2239 | int tmp, point, width, max; | |
2240 | ||
2241 | if (end <= start) | |
2242 | return 0; | |
2243 | ||
2244 | point = 0; | |
2245 | max = end; | |
2246 | ||
2247 | while (point < start) | |
2248 | { | |
2249 | tmp = mbrlen (str + point, max, &ps); | |
b80f6443 | 2250 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2251 | { |
2252 | /* In this case, the bytes are invalid or too short to compose a | |
2253 | multibyte character, so we assume that the first byte represents | |
2254 | a single character. */ | |
2255 | point++; | |
2256 | max--; | |
2257 | ||
2258 | /* Clear the state of the byte sequence, because in this case the | |
2259 | effect of mbstate is undefined. */ | |
2260 | memset (&ps, 0, sizeof (mbstate_t)); | |
2261 | } | |
b80f6443 JA |
2262 | else if (MB_NULLWCH (tmp)) |
2263 | break; /* Found '\0' */ | |
7117c2d2 JA |
2264 | else |
2265 | { | |
2266 | point += tmp; | |
2267 | max -= tmp; | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | /* If START is not a byte that starts a character, then POINT will be | |
2272 | greater than START. In this case, assume that (POINT - START) gives | |
2273 | a byte count that is the number of columns of difference. */ | |
2274 | width = point - start; | |
2275 | ||
2276 | while (point < end) | |
2277 | { | |
2278 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
b80f6443 | 2279 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2280 | { |
2281 | /* In this case, the bytes are invalid or too short to compose a | |
2282 | multibyte character, so we assume that the first byte represents | |
2283 | a single character. */ | |
2284 | point++; | |
2285 | max--; | |
2286 | ||
2287 | /* and assume that the byte occupies a single column. */ | |
2288 | width++; | |
2289 | ||
2290 | /* Clear the state of the byte sequence, because in this case the | |
2291 | effect of mbstate is undefined. */ | |
2292 | memset (&ps, 0, sizeof (mbstate_t)); | |
2293 | } | |
b80f6443 JA |
2294 | else if (MB_NULLWCH (tmp)) |
2295 | break; /* Found '\0' */ | |
7117c2d2 JA |
2296 | else |
2297 | { | |
2298 | point += tmp; | |
2299 | max -= tmp; | |
2300 | tmp = wcwidth(wc); | |
2301 | width += (tmp >= 0) ? tmp : 1; | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | width += point - end; | |
2306 | ||
2307 | return width; | |
2308 | } | |
2309 | #endif /* HANDLE_MULTIBYTE */ |