]>
Commit | Line | Data |
---|---|---|
1 | /* display.c -- readline redisplay facility. */ | |
2 | ||
3 | /* Copyright (C) 1987-2013 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of the GNU Readline Library (Readline), a library | |
6 | for reading lines of text with interactive input and history editing. | |
7 | ||
8 | Readline is free software: you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation, either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | Readline is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with Readline. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #define READLINE_LIBRARY | |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <sys/types.h> | |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
34 | #include "posixstat.h" | |
35 | ||
36 | #if defined (HAVE_STDLIB_H) | |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
42 | #include <stdio.h> | |
43 | ||
44 | #ifdef __MSDOS__ | |
45 | # include <pc.h> | |
46 | #endif | |
47 | ||
48 | /* System-specific feature definitions and include files. */ | |
49 | #include "rldefs.h" | |
50 | #include "rlmbutil.h" | |
51 | ||
52 | /* Termcap library stuff. */ | |
53 | #include "tcap.h" | |
54 | ||
55 | /* Some standard library routines. */ | |
56 | #include "readline.h" | |
57 | #include "history.h" | |
58 | ||
59 | #include "rlprivate.h" | |
60 | #include "xmalloc.h" | |
61 | ||
62 | #if !defined (strchr) && !defined (__STDC__) | |
63 | extern char *strchr (), *strrchr (); | |
64 | #endif /* !strchr && !__STDC__ */ | |
65 | ||
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)); | |
69 | static void insert_some_chars PARAMS((char *, int, int)); | |
70 | static void open_some_spaces PARAMS((int)); | |
71 | static void cr PARAMS((void)); | |
72 | static void redraw_prompt PARAMS((char *)); | |
73 | ||
74 | /* Values for FLAGS */ | |
75 | #define PMT_MULTILINE 0x01 | |
76 | ||
77 | static char *expand_prompt PARAMS((char *, int, int *, int *, int *, int *)); | |
78 | ||
79 | /* State of visible and invisible lines. */ | |
80 | struct line_state | |
81 | { | |
82 | char *line; | |
83 | int *lbreaks; | |
84 | int lbsize; | |
85 | #if defined (HANDLE_MULTIBYTE) | |
86 | int wbsize; | |
87 | int *wrapped_line; | |
88 | #endif | |
89 | }; | |
90 | ||
91 | /* The line display buffers. One is the line currently displayed on | |
92 | the screen. The other is the line about to be displayed. */ | |
93 | static struct line_state line_state_array[2]; | |
94 | static struct line_state *line_state_visible = &line_state_array[0]; | |
95 | static struct line_state *line_state_invisible = &line_state_array[1]; | |
96 | static int line_structures_initialized = 0; | |
97 | ||
98 | /* Backwards-compatible names. */ | |
99 | #define inv_lbreaks (line_state_invisible->lbreaks) | |
100 | #define inv_lbsize (line_state_invisible->lbsize) | |
101 | #define vis_lbreaks (line_state_visible->lbreaks) | |
102 | #define vis_lbsize (line_state_visible->lbsize) | |
103 | ||
104 | #define visible_line (line_state_visible->line) | |
105 | #define invisible_line (line_state_invisible->line) | |
106 | ||
107 | #if defined (HANDLE_MULTIBYTE) | |
108 | static int _rl_col_width PARAMS((const char *, int, int, int)); | |
109 | #else | |
110 | # define _rl_col_width(l, s, e, f) (((e) <= (s)) ? 0 : (e) - (s)) | |
111 | #endif | |
112 | ||
113 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
114 | by backing up or outputting a carriage return and moving forward. CUR | |
115 | and NEW are either both buffer positions or absolute screen positions. */ | |
116 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
117 | ||
118 | /* _rl_last_c_pos is an absolute cursor position in multibyte locales and a | |
119 | buffer index in others. This macro is used when deciding whether the | |
120 | current cursor position is in the middle of a prompt string containing | |
121 | invisible characters. XXX - might need to take `modmark' into account. */ | |
122 | #define PROMPT_ENDING_INDEX \ | |
123 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1) | |
124 | ||
125 | ||
126 | /* **************************************************************** */ | |
127 | /* */ | |
128 | /* Display stuff */ | |
129 | /* */ | |
130 | /* **************************************************************** */ | |
131 | ||
132 | /* This is the stuff that is hard for me. I never seem to write good | |
133 | display routines in C. Let's see how I do this time. */ | |
134 | ||
135 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
136 | the problems of input lines longer than the screen width. | |
137 | ||
138 | update_line and the code that calls it makes a multiple line, | |
139 | automatically wrapping line update. Careful attention needs | |
140 | to be paid to the vertical position variables. */ | |
141 | ||
142 | /* Keep two buffers; one which reflects the current contents of the | |
143 | screen, and the other to draw what we think the new contents should | |
144 | be. Then compare the buffers, and make whatever changes to the | |
145 | screen itself that we should. Finally, make the buffer that we | |
146 | just drew into be the one which reflects the current contents of the | |
147 | screen, and place the cursor where it belongs. | |
148 | ||
149 | Commands that want to can fix the display themselves, and then let | |
150 | this function know that the display has been fixed by setting the | |
151 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
152 | ||
153 | /* Application-specific redisplay function. */ | |
154 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; | |
155 | ||
156 | /* Global variables declared here. */ | |
157 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
158 | int rl_display_fixed = 0; | |
159 | ||
160 | int _rl_suppress_redisplay = 0; | |
161 | int _rl_want_redisplay = 0; | |
162 | ||
163 | /* The stuff that gets printed out before the actual text of the line. | |
164 | This is usually pointing to rl_prompt. */ | |
165 | char *rl_display_prompt = (char *)NULL; | |
166 | ||
167 | /* Variables used to include the editing mode in the prompt. */ | |
168 | char *_rl_emacs_mode_str; | |
169 | int _rl_emacs_modestr_len; | |
170 | ||
171 | char *_rl_vi_ins_mode_str; | |
172 | int _rl_vi_ins_modestr_len; | |
173 | ||
174 | char *_rl_vi_cmd_mode_str; | |
175 | int _rl_vi_cmd_modestr_len; | |
176 | ||
177 | /* Pseudo-global variables declared here. */ | |
178 | ||
179 | /* The visible cursor position. If you print some text, adjust this. */ | |
180 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale | |
181 | supporting multibyte characters, and an absolute cursor position when | |
182 | in such a locale. This is an artifact of the donated multibyte support. | |
183 | Care must be taken when modifying its value. */ | |
184 | int _rl_last_c_pos = 0; | |
185 | int _rl_last_v_pos = 0; | |
186 | ||
187 | static int cpos_adjusted; | |
188 | static int cpos_buffer_position; | |
189 | static int displaying_prompt_first_line; | |
190 | static int prompt_multibyte_chars; | |
191 | ||
192 | /* Number of lines currently on screen minus 1. */ | |
193 | int _rl_vis_botlin = 0; | |
194 | ||
195 | /* Variables used only in this file. */ | |
196 | /* The last left edge of text that was displayed. This is used when | |
197 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
198 | static int last_lmargin; | |
199 | ||
200 | /* A buffer for `modeline' messages. */ | |
201 | static char *msg_buf = 0; | |
202 | static int msg_bufsiz = 0; | |
203 | ||
204 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
205 | static int forced_display; | |
206 | ||
207 | /* Default and initial buffer size. Can grow. */ | |
208 | static int line_size = 1024; | |
209 | ||
210 | /* Variables to keep track of the expanded prompt string, which may | |
211 | include invisible characters. */ | |
212 | ||
213 | static char *local_prompt, *local_prompt_prefix; | |
214 | static int local_prompt_len; | |
215 | static int prompt_visible_length, prompt_prefix_length; | |
216 | ||
217 | /* The number of invisible characters in the line currently being | |
218 | displayed on the screen. */ | |
219 | static int visible_wrap_offset; | |
220 | ||
221 | /* The number of invisible characters in the prompt string. Static so it | |
222 | can be shared between rl_redisplay and update_line */ | |
223 | static int wrap_offset; | |
224 | ||
225 | /* The index of the last invisible character in the prompt string. */ | |
226 | static int prompt_last_invisible; | |
227 | ||
228 | /* The length (buffer offset) of the first line of the last (possibly | |
229 | multi-line) buffer displayed on the screen. */ | |
230 | static int visible_first_line_len; | |
231 | ||
232 | /* Number of invisible characters on the first physical line of the prompt. | |
233 | Only valid when the number of physical characters in the prompt exceeds | |
234 | (or is equal to) _rl_screenwidth. */ | |
235 | static int prompt_invis_chars_first_line; | |
236 | ||
237 | static int prompt_last_screen_line; | |
238 | ||
239 | static int prompt_physical_chars; | |
240 | ||
241 | /* set to a non-zero value by rl_redisplay if we are marking modified history | |
242 | lines and the current line is so marked. */ | |
243 | static int modmark; | |
244 | ||
245 | /* Variables to save and restore prompt and display information. */ | |
246 | ||
247 | /* These are getting numerous enough that it's time to create a struct. */ | |
248 | ||
249 | static char *saved_local_prompt; | |
250 | static char *saved_local_prefix; | |
251 | static int saved_last_invisible; | |
252 | static int saved_visible_length; | |
253 | static int saved_prefix_length; | |
254 | static int saved_local_length; | |
255 | static int saved_invis_chars_first_line; | |
256 | static int saved_physical_chars; | |
257 | ||
258 | /* Return a string indicating the editing mode, for use in the prompt. */ | |
259 | ||
260 | static char * | |
261 | prompt_modestr (lenp) | |
262 | int *lenp; | |
263 | { | |
264 | if (rl_editing_mode == emacs_mode) | |
265 | { | |
266 | if (lenp) | |
267 | *lenp = _rl_emacs_mode_str ? _rl_emacs_modestr_len : RL_EMACS_MODESTR_DEFLEN; | |
268 | return _rl_emacs_mode_str ? _rl_emacs_mode_str : RL_EMACS_MODESTR_DEFAULT; | |
269 | } | |
270 | else if (_rl_keymap == vi_insertion_keymap) | |
271 | { | |
272 | if (lenp) | |
273 | *lenp = _rl_vi_ins_mode_str ? _rl_vi_ins_modestr_len : RL_VI_INS_MODESTR_DEFLEN; | |
274 | return _rl_vi_ins_mode_str ? _rl_vi_ins_mode_str : RL_VI_INS_MODESTR_DEFAULT; /* vi insert mode */ | |
275 | } | |
276 | else | |
277 | { | |
278 | if (lenp) | |
279 | *lenp = _rl_vi_cmd_mode_str ? _rl_vi_cmd_modestr_len : RL_VI_CMD_MODESTR_DEFLEN; | |
280 | return _rl_vi_cmd_mode_str ? _rl_vi_cmd_mode_str : RL_VI_CMD_MODESTR_DEFAULT; /* vi command mode */ | |
281 | } | |
282 | } | |
283 | ||
284 | /* Expand the prompt string S and return the number of visible | |
285 | characters in *LP, if LP is not null. This is currently more-or-less | |
286 | a placeholder for expansion. LIP, if non-null is a place to store the | |
287 | index of the last invisible character in the returned string. NIFLP, | |
288 | if non-zero, is a place to store the number of invisible characters in | |
289 | the first prompt line. The previous are used as byte counts -- indexes | |
290 | into a character buffer. */ | |
291 | ||
292 | /* Current implementation: | |
293 | \001 (^A) start non-visible characters | |
294 | \002 (^B) end non-visible characters | |
295 | all characters except \001 and \002 (following a \001) are copied to | |
296 | the returned string; all characters except those between \001 and | |
297 | \002 are assumed to be `visible'. */ | |
298 | ||
299 | /* Possible values for FLAGS: | |
300 | PMT_MULTILINE caller indicates that this is part of a multiline prompt | |
301 | */ | |
302 | ||
303 | static char * | |
304 | expand_prompt (pmt, flags, lp, lip, niflp, vlp) | |
305 | char *pmt; | |
306 | int flags; | |
307 | int *lp, *lip, *niflp, *vlp; | |
308 | { | |
309 | char *r, *ret, *p, *igstart, *nprompt, *ms; | |
310 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; | |
311 | int mlen; | |
312 | ||
313 | /* We only expand the mode string for the last line of a multiline prompt | |
314 | (a prompt with embedded newlines). */ | |
315 | ms = (((pmt == rl_prompt) ^ (flags & PMT_MULTILINE)) && _rl_show_mode_in_prompt) ? prompt_modestr (&mlen) : 0; | |
316 | if (ms) | |
317 | { | |
318 | l = strlen (pmt); | |
319 | nprompt = (char *)xmalloc (l + mlen + 1); | |
320 | memcpy (nprompt, ms, mlen); | |
321 | strcpy (nprompt + mlen, pmt); | |
322 | } | |
323 | else | |
324 | nprompt = pmt; | |
325 | ||
326 | /* Short-circuit if we can. */ | |
327 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (nprompt, RL_PROMPT_START_IGNORE) == 0) | |
328 | { | |
329 | r = (nprompt == pmt) ? savestring (pmt) : nprompt; | |
330 | ||
331 | if (lp) | |
332 | *lp = strlen (r); | |
333 | if (lip) | |
334 | *lip = 0; | |
335 | if (niflp) | |
336 | *niflp = 0; | |
337 | if (vlp) | |
338 | *vlp = lp ? *lp : strlen (r); | |
339 | return r; | |
340 | } | |
341 | ||
342 | l = strlen (nprompt); /* XXX */ | |
343 | r = ret = (char *)xmalloc (l + 1); | |
344 | ||
345 | rl = physchars = 0; /* mode string now part of nprompt */ | |
346 | invfl = 0; /* invisible chars in first line of prompt */ | |
347 | invflset = 0; /* we only want to set invfl once */ | |
348 | igstart = 0; | |
349 | ||
350 | for (ignoring = last = ninvis = 0, p = nprompt; p && *p; p++) | |
351 | { | |
352 | /* This code strips the invisible character string markers | |
353 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
354 | if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */ | |
355 | { | |
356 | ignoring = 1; | |
357 | igstart = p; | |
358 | continue; | |
359 | } | |
360 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
361 | { | |
362 | ignoring = 0; | |
363 | if (p != (igstart + 1)) | |
364 | last = r - ret - 1; | |
365 | continue; | |
366 | } | |
367 | else | |
368 | { | |
369 | #if defined (HANDLE_MULTIBYTE) | |
370 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
371 | { | |
372 | pind = p - nprompt; | |
373 | ind = _rl_find_next_mbchar (nprompt, pind, 1, MB_FIND_NONZERO); | |
374 | l = ind - pind; | |
375 | while (l--) | |
376 | *r++ = *p++; | |
377 | if (!ignoring) | |
378 | { | |
379 | /* rl ends up being assigned to prompt_visible_length, | |
380 | which is the number of characters in the buffer that | |
381 | contribute to characters on the screen, which might | |
382 | not be the same as the number of physical characters | |
383 | on the screen in the presence of multibyte characters */ | |
384 | rl += ind - pind; | |
385 | physchars += _rl_col_width (nprompt, pind, ind, 0); | |
386 | } | |
387 | else | |
388 | ninvis += ind - pind; | |
389 | p--; /* compensate for later increment */ | |
390 | } | |
391 | else | |
392 | #endif | |
393 | { | |
394 | *r++ = *p; | |
395 | if (!ignoring) | |
396 | { | |
397 | rl++; /* visible length byte counter */ | |
398 | physchars++; | |
399 | } | |
400 | else | |
401 | ninvis++; /* invisible chars byte counter */ | |
402 | } | |
403 | ||
404 | if (invflset == 0 && rl >= _rl_screenwidth) | |
405 | { | |
406 | invfl = ninvis; | |
407 | invflset = 1; | |
408 | } | |
409 | } | |
410 | } | |
411 | ||
412 | if (rl < _rl_screenwidth) | |
413 | invfl = ninvis; | |
414 | ||
415 | *r = '\0'; | |
416 | if (lp) | |
417 | *lp = rl; | |
418 | if (lip) | |
419 | *lip = last; | |
420 | if (niflp) | |
421 | *niflp = invfl; | |
422 | if (vlp) | |
423 | *vlp = physchars; | |
424 | ||
425 | if (nprompt != pmt) | |
426 | free (nprompt); | |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
431 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from | |
432 | PMT and return the rest of PMT. */ | |
433 | char * | |
434 | _rl_strip_prompt (pmt) | |
435 | char *pmt; | |
436 | { | |
437 | char *ret; | |
438 | ||
439 | ret = expand_prompt (pmt, 0, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); | |
440 | return ret; | |
441 | } | |
442 | ||
443 | void | |
444 | _rl_reset_prompt () | |
445 | { | |
446 | rl_visible_prompt_length = rl_expand_prompt (rl_prompt); | |
447 | } | |
448 | ||
449 | /* | |
450 | * Expand the prompt string into the various display components, if | |
451 | * necessary. | |
452 | * | |
453 | * local_prompt = expanded last line of string in rl_display_prompt | |
454 | * (portion after the final newline) | |
455 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
456 | * expanded via expand_prompt | |
457 | * prompt_visible_length = number of visible characters in local_prompt | |
458 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
459 | * | |
460 | * This function is called once per call to readline(). It may also be | |
461 | * called arbitrarily to expand the primary prompt. | |
462 | * | |
463 | * The return value is the number of visible characters on the last line | |
464 | * of the (possibly multi-line) prompt. | |
465 | */ | |
466 | int | |
467 | rl_expand_prompt (prompt) | |
468 | char *prompt; | |
469 | { | |
470 | char *p, *t; | |
471 | int c; | |
472 | ||
473 | /* Clear out any saved values. */ | |
474 | FREE (local_prompt); | |
475 | FREE (local_prompt_prefix); | |
476 | ||
477 | local_prompt = local_prompt_prefix = (char *)0; | |
478 | local_prompt_len = 0; | |
479 | prompt_last_invisible = prompt_invis_chars_first_line = 0; | |
480 | prompt_visible_length = prompt_physical_chars = 0; | |
481 | ||
482 | if (prompt == 0 || *prompt == 0) | |
483 | return (0); | |
484 | ||
485 | p = strrchr (prompt, '\n'); | |
486 | if (p == 0) | |
487 | { | |
488 | /* The prompt is only one logical line, though it might wrap. */ | |
489 | local_prompt = expand_prompt (prompt, 0, &prompt_visible_length, | |
490 | &prompt_last_invisible, | |
491 | &prompt_invis_chars_first_line, | |
492 | &prompt_physical_chars); | |
493 | local_prompt_prefix = (char *)0; | |
494 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; | |
495 | return (prompt_visible_length); | |
496 | } | |
497 | else | |
498 | { | |
499 | /* The prompt spans multiple lines. */ | |
500 | t = ++p; | |
501 | local_prompt = expand_prompt (p, PMT_MULTILINE, | |
502 | &prompt_visible_length, | |
503 | &prompt_last_invisible, | |
504 | &prompt_invis_chars_first_line, | |
505 | &prompt_physical_chars); | |
506 | c = *t; *t = '\0'; | |
507 | /* The portion of the prompt string up to and including the | |
508 | final newline is now null-terminated. */ | |
509 | local_prompt_prefix = expand_prompt (prompt, PMT_MULTILINE, | |
510 | &prompt_prefix_length, | |
511 | (int *)NULL, | |
512 | (int *)NULL, | |
513 | (int *)NULL); | |
514 | *t = c; | |
515 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; | |
516 | return (prompt_prefix_length); | |
517 | } | |
518 | } | |
519 | ||
520 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated | |
521 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
522 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
523 | increased. If the lines have already been allocated, this ensures that | |
524 | they can hold at least MINSIZE characters. */ | |
525 | static void | |
526 | init_line_structures (minsize) | |
527 | int minsize; | |
528 | { | |
529 | register int n; | |
530 | ||
531 | if (invisible_line == 0) /* initialize it */ | |
532 | { | |
533 | if (line_size < minsize) | |
534 | line_size = minsize; | |
535 | visible_line = (char *)xmalloc (line_size); | |
536 | invisible_line = (char *)xmalloc (line_size); | |
537 | } | |
538 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
539 | { | |
540 | line_size *= 2; | |
541 | if (line_size < minsize) | |
542 | line_size = minsize; | |
543 | visible_line = (char *)xrealloc (visible_line, line_size); | |
544 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
545 | } | |
546 | ||
547 | for (n = minsize; n < line_size; n++) | |
548 | { | |
549 | visible_line[n] = 0; | |
550 | invisible_line[n] = 1; | |
551 | } | |
552 | ||
553 | if (vis_lbreaks == 0) | |
554 | { | |
555 | /* should be enough. */ | |
556 | inv_lbsize = vis_lbsize = 256; | |
557 | ||
558 | #if defined (HANDLE_MULTIBYTE) | |
559 | line_state_visible->wbsize = vis_lbsize; | |
560 | line_state_visible->wrapped_line = (int *)xmalloc (line_state_visible->wbsize * sizeof (int)); | |
561 | ||
562 | line_state_invisible->wbsize = inv_lbsize; | |
563 | line_state_invisible->wrapped_line = (int *)xmalloc (line_state_invisible->wbsize * sizeof (int)); | |
564 | #endif | |
565 | ||
566 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
567 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
568 | inv_lbreaks[0] = vis_lbreaks[0] = 0; | |
569 | } | |
570 | ||
571 | line_structures_initialized = 1; | |
572 | } | |
573 | ||
574 | /* Basic redisplay algorithm. */ | |
575 | void | |
576 | rl_redisplay () | |
577 | { | |
578 | register int in, out, c, linenum, cursor_linenum; | |
579 | register char *line; | |
580 | int inv_botlin, lb_botlin, lb_linenum, o_cpos; | |
581 | int newlines, lpos, temp, n0, num, prompt_lines_estimate; | |
582 | char *prompt_this_line; | |
583 | #if defined (HANDLE_MULTIBYTE) | |
584 | wchar_t wc; | |
585 | size_t wc_bytes; | |
586 | int wc_width; | |
587 | mbstate_t ps; | |
588 | int _rl_wrapped_multicolumn = 0; | |
589 | int mb_cur_max = MB_CUR_MAX; | |
590 | #endif | |
591 | ||
592 | if (_rl_echoing_p == 0) | |
593 | return; | |
594 | ||
595 | /* Block keyboard interrupts because this function manipulates global | |
596 | data structures. */ | |
597 | _rl_block_sigint (); | |
598 | RL_SETSTATE (RL_STATE_REDISPLAYING); | |
599 | ||
600 | if (!rl_display_prompt) | |
601 | rl_display_prompt = ""; | |
602 | ||
603 | if (line_structures_initialized == 0) | |
604 | { | |
605 | init_line_structures (0); | |
606 | rl_on_new_line (); | |
607 | } | |
608 | ||
609 | /* Draw the line into the buffer. */ | |
610 | cpos_buffer_position = -1; | |
611 | ||
612 | prompt_multibyte_chars = prompt_visible_length - prompt_physical_chars; | |
613 | ||
614 | line = invisible_line; | |
615 | out = inv_botlin = 0; | |
616 | ||
617 | /* Mark the line as modified or not. We only do this for history | |
618 | lines. */ | |
619 | modmark = 0; | |
620 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) | |
621 | { | |
622 | line[out++] = '*'; | |
623 | line[out] = '\0'; | |
624 | modmark = 1; | |
625 | } | |
626 | ||
627 | /* If someone thought that the redisplay was handled, but the currently | |
628 | visible line has a different modification state than the one about | |
629 | to become visible, then correct the caller's misconception. */ | |
630 | if (visible_line[0] != invisible_line[0]) | |
631 | rl_display_fixed = 0; | |
632 | ||
633 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
634 | one passed to readline()), use the values we have already expanded. | |
635 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
636 | number of non-visible characters in the prompt string. */ | |
637 | if (rl_display_prompt == rl_prompt || local_prompt) | |
638 | { | |
639 | if (local_prompt_prefix && forced_display) | |
640 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
641 | ||
642 | if (local_prompt_len > 0) | |
643 | { | |
644 | temp = local_prompt_len + out + 2; | |
645 | if (temp >= line_size) | |
646 | { | |
647 | line_size = (temp + 1024) - (temp % 1024); | |
648 | visible_line = (char *)xrealloc (visible_line, line_size); | |
649 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
650 | } | |
651 | strncpy (line + out, local_prompt, local_prompt_len); | |
652 | out += local_prompt_len; | |
653 | } | |
654 | line[out] = '\0'; | |
655 | wrap_offset = local_prompt_len - prompt_visible_length; | |
656 | } | |
657 | else | |
658 | { | |
659 | int pmtlen; | |
660 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
661 | if (!prompt_this_line) | |
662 | prompt_this_line = rl_display_prompt; | |
663 | else | |
664 | { | |
665 | prompt_this_line++; | |
666 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ | |
667 | if (forced_display) | |
668 | { | |
669 | _rl_output_some_chars (rl_display_prompt, pmtlen); | |
670 | /* Make sure we are at column zero even after a newline, | |
671 | regardless of the state of terminal output processing. */ | |
672 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') | |
673 | cr (); | |
674 | } | |
675 | } | |
676 | ||
677 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); | |
678 | temp = pmtlen + out + 2; | |
679 | if (temp >= line_size) | |
680 | { | |
681 | line_size = (temp + 1024) - (temp % 1024); | |
682 | visible_line = (char *)xrealloc (visible_line, line_size); | |
683 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
684 | } | |
685 | strncpy (line + out, prompt_this_line, pmtlen); | |
686 | out += pmtlen; | |
687 | line[out] = '\0'; | |
688 | wrap_offset = prompt_invis_chars_first_line = 0; | |
689 | } | |
690 | ||
691 | #define CHECK_INV_LBREAKS() \ | |
692 | do { \ | |
693 | if (newlines >= (inv_lbsize - 2)) \ | |
694 | { \ | |
695 | inv_lbsize *= 2; \ | |
696 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
697 | } \ | |
698 | } while (0) | |
699 | ||
700 | #if defined (HANDLE_MULTIBYTE) | |
701 | #define CHECK_LPOS() \ | |
702 | do { \ | |
703 | lpos++; \ | |
704 | if (lpos >= _rl_screenwidth) \ | |
705 | { \ | |
706 | if (newlines >= (inv_lbsize - 2)) \ | |
707 | { \ | |
708 | inv_lbsize *= 2; \ | |
709 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
710 | } \ | |
711 | inv_lbreaks[++newlines] = out; \ | |
712 | if (newlines >= (line_state_invisible->wbsize - 1)) \ | |
713 | { \ | |
714 | line_state_invisible->wbsize *= 2; \ | |
715 | line_state_invisible->wrapped_line = (int *)xrealloc (line_state_invisible->wrapped_line, line_state_invisible->wbsize * sizeof(int)); \ | |
716 | } \ | |
717 | line_state_invisible->wrapped_line[newlines] = _rl_wrapped_multicolumn; \ | |
718 | lpos = 0; \ | |
719 | } \ | |
720 | } while (0) | |
721 | #else | |
722 | #define CHECK_LPOS() \ | |
723 | do { \ | |
724 | lpos++; \ | |
725 | if (lpos >= _rl_screenwidth) \ | |
726 | { \ | |
727 | if (newlines >= (inv_lbsize - 2)) \ | |
728 | { \ | |
729 | inv_lbsize *= 2; \ | |
730 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
731 | } \ | |
732 | inv_lbreaks[++newlines] = out; \ | |
733 | lpos = 0; \ | |
734 | } \ | |
735 | } while (0) | |
736 | #endif | |
737 | ||
738 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
739 | inv_lbreaks[newlines = 0] = 0; | |
740 | lpos = prompt_physical_chars + modmark; | |
741 | ||
742 | #if defined (HANDLE_MULTIBYTE) | |
743 | memset (line_state_invisible->wrapped_line, 0, line_state_invisible->wbsize * sizeof (int)); | |
744 | num = 0; | |
745 | #endif | |
746 | ||
747 | /* prompt_invis_chars_first_line is the number of invisible characters in | |
748 | the first physical line of the prompt. | |
749 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
750 | chars on the second (or, more generally, last) line. */ | |
751 | ||
752 | /* This is zero-based, used to set the newlines */ | |
753 | prompt_lines_estimate = lpos / _rl_screenwidth; | |
754 | ||
755 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
756 | contents of the command line? */ | |
757 | while (lpos >= _rl_screenwidth) | |
758 | { | |
759 | int z, p; | |
760 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with | |
761 | invisible characters that is longer than the screen width. The | |
762 | prompt_invis_chars_first_line variable could be made into an array | |
763 | saying how many invisible characters there are per line, but that's | |
764 | probably too much work for the benefit gained. How many people have | |
765 | prompts that exceed two physical lines? | |
766 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
767 | #if defined (HANDLE_MULTIBYTE) | |
768 | if (mb_cur_max > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) | |
769 | { | |
770 | n0 = num; | |
771 | temp = local_prompt_len; | |
772 | while (num < temp) | |
773 | { | |
774 | z = _rl_col_width (local_prompt, n0, num, 1); | |
775 | if (z > _rl_screenwidth) | |
776 | { | |
777 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
778 | break; | |
779 | } | |
780 | else if (z == _rl_screenwidth) | |
781 | { | |
782 | /* If we are in the middle or at the end of a multibyte | |
783 | character, we want to move to the start, then find out | |
784 | where it ends so we know where to insert the newline. | |
785 | If this isn't a multibyte character, its the same as num++ */ | |
786 | p = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
787 | num = _rl_find_next_mbchar (local_prompt, p, 1, MB_FIND_ANY); | |
788 | break; | |
789 | } | |
790 | num++; | |
791 | } | |
792 | temp = num; | |
793 | } | |
794 | else | |
795 | #endif /* !HANDLE_MULTIBYTE */ | |
796 | temp = ((newlines + 1) * _rl_screenwidth); | |
797 | ||
798 | /* Now account for invisible characters in the current line. */ | |
799 | /* XXX - this assumes that the invisible characters may be split, but only | |
800 | between the first and the last lines. */ | |
801 | temp += (newlines == 0) ? prompt_invis_chars_first_line | |
802 | : ((newlines == prompt_lines_estimate) ? wrap_offset : prompt_invis_chars_first_line); | |
803 | ||
804 | inv_lbreaks[++newlines] = temp; | |
805 | #if defined (HANDLE_MULTIBYTE) | |
806 | if (mb_cur_max > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) | |
807 | lpos -= _rl_col_width (local_prompt, n0, num, 1); | |
808 | else | |
809 | #endif | |
810 | lpos -= _rl_screenwidth; | |
811 | } | |
812 | ||
813 | prompt_last_screen_line = newlines; | |
814 | ||
815 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
816 | track of where the cursor is (cpos_buffer_position), the number of the line containing | |
817 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). | |
818 | It maintains an array of line breaks for display (inv_lbreaks). | |
819 | This handles expanding tabs for display and displaying meta characters. */ | |
820 | lb_linenum = 0; | |
821 | #if defined (HANDLE_MULTIBYTE) | |
822 | in = 0; | |
823 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
824 | { | |
825 | memset (&ps, 0, sizeof (mbstate_t)); | |
826 | /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */ | |
827 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
828 | } | |
829 | else | |
830 | wc_bytes = 1; | |
831 | while (in < rl_end) | |
832 | #else | |
833 | for (in = 0; in < rl_end; in++) | |
834 | #endif | |
835 | { | |
836 | c = (unsigned char)rl_line_buffer[in]; | |
837 | ||
838 | #if defined (HANDLE_MULTIBYTE) | |
839 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
840 | { | |
841 | if (MB_INVALIDCH (wc_bytes)) | |
842 | { | |
843 | /* Byte sequence is invalid or shortened. Assume that the | |
844 | first byte represents a character. */ | |
845 | wc_bytes = 1; | |
846 | /* Assume that a character occupies a single column. */ | |
847 | wc_width = 1; | |
848 | memset (&ps, 0, sizeof (mbstate_t)); | |
849 | } | |
850 | else if (MB_NULLWCH (wc_bytes)) | |
851 | break; /* Found '\0' */ | |
852 | else | |
853 | { | |
854 | temp = WCWIDTH (wc); | |
855 | wc_width = (temp >= 0) ? temp : 1; | |
856 | } | |
857 | } | |
858 | #endif | |
859 | ||
860 | if (out + 8 >= line_size) /* XXX - 8 for \t */ | |
861 | { | |
862 | line_size *= 2; | |
863 | visible_line = (char *)xrealloc (visible_line, line_size); | |
864 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
865 | line = invisible_line; | |
866 | } | |
867 | ||
868 | if (in == rl_point) | |
869 | { | |
870 | cpos_buffer_position = out; | |
871 | lb_linenum = newlines; | |
872 | } | |
873 | ||
874 | #if defined (HANDLE_MULTIBYTE) | |
875 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
876 | #else | |
877 | if (META_CHAR (c)) | |
878 | #endif | |
879 | { | |
880 | if (_rl_output_meta_chars == 0) | |
881 | { | |
882 | sprintf (line + out, "\\%o", c); | |
883 | ||
884 | if (lpos + 4 >= _rl_screenwidth) | |
885 | { | |
886 | temp = _rl_screenwidth - lpos; | |
887 | CHECK_INV_LBREAKS (); | |
888 | inv_lbreaks[++newlines] = out + temp; | |
889 | lpos = 4 - temp; | |
890 | } | |
891 | else | |
892 | lpos += 4; | |
893 | ||
894 | out += 4; | |
895 | } | |
896 | else | |
897 | { | |
898 | line[out++] = c; | |
899 | CHECK_LPOS(); | |
900 | } | |
901 | } | |
902 | #if defined (DISPLAY_TABS) | |
903 | else if (c == '\t') | |
904 | { | |
905 | register int newout; | |
906 | ||
907 | #if 0 | |
908 | newout = (out | (int)7) + 1; | |
909 | #else | |
910 | newout = out + 8 - lpos % 8; | |
911 | #endif | |
912 | temp = newout - out; | |
913 | if (lpos + temp >= _rl_screenwidth) | |
914 | { | |
915 | register int temp2; | |
916 | temp2 = _rl_screenwidth - lpos; | |
917 | CHECK_INV_LBREAKS (); | |
918 | inv_lbreaks[++newlines] = out + temp2; | |
919 | lpos = temp - temp2; | |
920 | while (out < newout) | |
921 | line[out++] = ' '; | |
922 | } | |
923 | else | |
924 | { | |
925 | while (out < newout) | |
926 | line[out++] = ' '; | |
927 | lpos += temp; | |
928 | } | |
929 | } | |
930 | #endif | |
931 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) | |
932 | { | |
933 | line[out++] = '\0'; /* XXX - sentinel */ | |
934 | CHECK_INV_LBREAKS (); | |
935 | inv_lbreaks[++newlines] = out; | |
936 | lpos = 0; | |
937 | } | |
938 | else if (CTRL_CHAR (c) || c == RUBOUT) | |
939 | { | |
940 | line[out++] = '^'; | |
941 | CHECK_LPOS(); | |
942 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
943 | CHECK_LPOS(); | |
944 | } | |
945 | else | |
946 | { | |
947 | #if defined (HANDLE_MULTIBYTE) | |
948 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
949 | { | |
950 | register int i; | |
951 | ||
952 | _rl_wrapped_multicolumn = 0; | |
953 | ||
954 | if (_rl_screenwidth < lpos + wc_width) | |
955 | for (i = lpos; i < _rl_screenwidth; i++) | |
956 | { | |
957 | /* The space will be removed in update_line() */ | |
958 | line[out++] = ' '; | |
959 | _rl_wrapped_multicolumn++; | |
960 | CHECK_LPOS(); | |
961 | } | |
962 | if (in == rl_point) | |
963 | { | |
964 | cpos_buffer_position = out; | |
965 | lb_linenum = newlines; | |
966 | } | |
967 | for (i = in; i < in+wc_bytes; i++) | |
968 | line[out++] = rl_line_buffer[i]; | |
969 | for (i = 0; i < wc_width; i++) | |
970 | CHECK_LPOS(); | |
971 | } | |
972 | else | |
973 | { | |
974 | line[out++] = c; | |
975 | CHECK_LPOS(); | |
976 | } | |
977 | #else | |
978 | line[out++] = c; | |
979 | CHECK_LPOS(); | |
980 | #endif | |
981 | } | |
982 | ||
983 | #if defined (HANDLE_MULTIBYTE) | |
984 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
985 | { | |
986 | in += wc_bytes; | |
987 | /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */ | |
988 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
989 | } | |
990 | else | |
991 | in++; | |
992 | #endif | |
993 | ||
994 | } | |
995 | line[out] = '\0'; | |
996 | if (cpos_buffer_position < 0) | |
997 | { | |
998 | cpos_buffer_position = out; | |
999 | lb_linenum = newlines; | |
1000 | } | |
1001 | ||
1002 | inv_botlin = lb_botlin = newlines; | |
1003 | CHECK_INV_LBREAKS (); | |
1004 | inv_lbreaks[newlines+1] = out; | |
1005 | cursor_linenum = lb_linenum; | |
1006 | ||
1007 | /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed. | |
1008 | CURSOR_LINENUM == line number where the cursor should be placed. */ | |
1009 | ||
1010 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
1011 | line buffers are really multiple lines, which would wrap every | |
1012 | (screenwidth - 1) characters. Go through each in turn, finding | |
1013 | the changed region and updating it. The line order is top to bottom. */ | |
1014 | ||
1015 | /* If we can move the cursor up and down, then use multiple lines, | |
1016 | otherwise, let long lines display in a single terminal line, and | |
1017 | horizontally scroll it. */ | |
1018 | displaying_prompt_first_line = 1; | |
1019 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) | |
1020 | { | |
1021 | int nleft, pos, changed_screen_line, tx; | |
1022 | ||
1023 | if (!rl_display_fixed || forced_display) | |
1024 | { | |
1025 | forced_display = 0; | |
1026 | ||
1027 | /* If we have more than a screenful of material to display, then | |
1028 | only display a screenful. We should display the last screen, | |
1029 | not the first. */ | |
1030 | if (out >= _rl_screenchars) | |
1031 | { | |
1032 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
1033 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
1034 | else | |
1035 | out = _rl_screenchars - 1; | |
1036 | } | |
1037 | ||
1038 | /* The first line is at character position 0 in the buffer. The | |
1039 | second and subsequent lines start at inv_lbreaks[N], offset by | |
1040 | OFFSET (which has already been calculated above). */ | |
1041 | ||
1042 | #define INVIS_FIRST() (prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset) | |
1043 | #define WRAP_OFFSET(line, offset) ((line == 0) \ | |
1044 | ? (offset ? INVIS_FIRST() : 0) \ | |
1045 | : ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0)) | |
1046 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
1047 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) | |
1048 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
1049 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
1050 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) | |
1051 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) | |
1052 | ||
1053 | #define OLD_CPOS_IN_PROMPT() (cpos_adjusted == 0 && \ | |
1054 | _rl_last_c_pos != o_cpos && \ | |
1055 | _rl_last_c_pos > wrap_offset && \ | |
1056 | o_cpos < prompt_last_invisible) | |
1057 | ||
1058 | /* For each line in the buffer, do the updating display. */ | |
1059 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
1060 | { | |
1061 | /* This can lead us astray if we execute a program that changes | |
1062 | the locale from a non-multibyte to a multibyte one. */ | |
1063 | o_cpos = _rl_last_c_pos; | |
1064 | cpos_adjusted = 0; | |
1065 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, | |
1066 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); | |
1067 | ||
1068 | /* update_line potentially changes _rl_last_c_pos, but doesn't | |
1069 | take invisible characters into account, since _rl_last_c_pos | |
1070 | is an absolute cursor position in a multibyte locale. See | |
1071 | if compensating here is the right thing, or if we have to | |
1072 | change update_line itself. There are several cases in which | |
1073 | update_line adjusts _rl_last_c_pos itself (so it can pass | |
1074 | _rl_move_cursor_relative accurate values); it communicates | |
1075 | this back by setting cpos_adjusted. If we assume that | |
1076 | _rl_last_c_pos is correct (an absolute cursor position) each | |
1077 | time update_line is called, then we can assume in our | |
1078 | calculations that o_cpos does not need to be adjusted by | |
1079 | wrap_offset. */ | |
1080 | if (linenum == 0 && (mb_cur_max > 1 && rl_byte_oriented == 0) && OLD_CPOS_IN_PROMPT()) | |
1081 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ | |
1082 | else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth && | |
1083 | (mb_cur_max > 1 && rl_byte_oriented == 0) && | |
1084 | cpos_adjusted == 0 && | |
1085 | _rl_last_c_pos != o_cpos && | |
1086 | _rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line)) | |
1087 | _rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line); | |
1088 | ||
1089 | /* If this is the line with the prompt, we might need to | |
1090 | compensate for invisible characters in the new line. Do | |
1091 | this only if there is not more than one new line (which | |
1092 | implies that we completely overwrite the old visible line) | |
1093 | and the new line is shorter than the old. Make sure we are | |
1094 | at the end of the new line before clearing. */ | |
1095 | if (linenum == 0 && | |
1096 | inv_botlin == 0 && _rl_last_c_pos == out && | |
1097 | (wrap_offset > visible_wrap_offset) && | |
1098 | (_rl_last_c_pos < visible_first_line_len)) | |
1099 | { | |
1100 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
1101 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
1102 | else | |
1103 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
1104 | if (nleft) | |
1105 | _rl_clear_to_eol (nleft); | |
1106 | } | |
1107 | #if 0 | |
1108 | /* This segment is intended to handle the case where the prompt | |
1109 | has invisible characters on the second line and the new line | |
1110 | to be displayed needs to clear the rest of the old characters | |
1111 | out (e.g., when printing the i-search prompt). In general, | |
1112 | the case of the new line being shorter than the old. | |
1113 | Incomplete */ | |
1114 | else if (linenum == prompt_last_screen_line && | |
1115 | prompt_physical_chars > _rl_screenwidth && | |
1116 | wrap_offset != prompt_invis_chars_first_line && | |
1117 | _rl_last_c_pos == out && | |
1118 | #endif | |
1119 | ||
1120 | ||
1121 | /* Since the new first line is now visible, save its length. */ | |
1122 | if (linenum == 0) | |
1123 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; | |
1124 | } | |
1125 | ||
1126 | /* We may have deleted some lines. If so, clear the left over | |
1127 | blank ones at the bottom out. */ | |
1128 | if (_rl_vis_botlin > inv_botlin) | |
1129 | { | |
1130 | char *tt; | |
1131 | for (; linenum <= _rl_vis_botlin; linenum++) | |
1132 | { | |
1133 | tt = VIS_CHARS (linenum); | |
1134 | _rl_move_vert (linenum); | |
1135 | _rl_move_cursor_relative (0, tt); | |
1136 | _rl_clear_to_eol | |
1137 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); | |
1138 | } | |
1139 | } | |
1140 | _rl_vis_botlin = inv_botlin; | |
1141 | ||
1142 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a | |
1143 | different screen line during this redisplay. */ | |
1144 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
1145 | if (changed_screen_line) | |
1146 | { | |
1147 | _rl_move_vert (cursor_linenum); | |
1148 | /* If we moved up to the line with the prompt using _rl_term_up, | |
1149 | the physical cursor position on the screen stays the same, | |
1150 | but the buffer position needs to be adjusted to account | |
1151 | for invisible characters. */ | |
1152 | if ((mb_cur_max == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) | |
1153 | _rl_last_c_pos += wrap_offset; | |
1154 | } | |
1155 | ||
1156 | /* We have to reprint the prompt if it contains invisible | |
1157 | characters, since it's not generally OK to just reprint | |
1158 | the characters from the current cursor position. But we | |
1159 | only need to reprint it if the cursor is before the last | |
1160 | invisible character in the prompt string. */ | |
1161 | nleft = prompt_visible_length + wrap_offset; | |
1162 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && | |
1163 | #if 0 | |
1164 | _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt) | |
1165 | #else | |
1166 | _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt) | |
1167 | #endif | |
1168 | { | |
1169 | #if defined (__MSDOS__) | |
1170 | putc ('\r', rl_outstream); | |
1171 | #else | |
1172 | if (_rl_term_cr) | |
1173 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1174 | #endif | |
1175 | if (modmark) | |
1176 | _rl_output_some_chars ("*", 1); | |
1177 | ||
1178 | _rl_output_some_chars (local_prompt, nleft); | |
1179 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
1180 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft, 1) - wrap_offset + modmark; | |
1181 | else | |
1182 | _rl_last_c_pos = nleft + modmark; | |
1183 | } | |
1184 | ||
1185 | /* Where on that line? And where does that line start | |
1186 | in the buffer? */ | |
1187 | pos = inv_lbreaks[cursor_linenum]; | |
1188 | /* nleft == number of characters in the line buffer between the | |
1189 | start of the line and the desired cursor position. */ | |
1190 | nleft = cpos_buffer_position - pos; | |
1191 | ||
1192 | /* NLEFT is now a number of characters in a buffer. When in a | |
1193 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
1194 | position that doesn't take invisible characters in the prompt | |
1195 | into account. We use a fudge factor to compensate. */ | |
1196 | ||
1197 | /* Since _rl_backspace() doesn't know about invisible characters in the | |
1198 | prompt, and there's no good way to tell it, we compensate for | |
1199 | those characters here and call _rl_backspace() directly. */ | |
1200 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) | |
1201 | { | |
1202 | /* TX == new physical cursor position in multibyte locale. */ | |
1203 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
1204 | tx = _rl_col_width (&visible_line[pos], 0, nleft, 1) - visible_wrap_offset; | |
1205 | else | |
1206 | tx = nleft; | |
1207 | if (tx >= 0 && _rl_last_c_pos > tx) | |
1208 | { | |
1209 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ | |
1210 | _rl_last_c_pos = tx; | |
1211 | } | |
1212 | } | |
1213 | ||
1214 | /* We need to note that in a multibyte locale we are dealing with | |
1215 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1216 | point specified by a buffer position (NLEFT) that doesn't take | |
1217 | invisible characters into account. */ | |
1218 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
1219 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
1220 | else if (nleft != _rl_last_c_pos) | |
1221 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
1222 | } | |
1223 | } | |
1224 | else /* Do horizontal scrolling. */ | |
1225 | { | |
1226 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1227 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1228 | ||
1229 | /* Always at top line. */ | |
1230 | _rl_last_v_pos = 0; | |
1231 | ||
1232 | /* Compute where in the buffer the displayed line should start. This | |
1233 | will be LMARGIN. */ | |
1234 | ||
1235 | /* The number of characters that will be displayed before the cursor. */ | |
1236 | ndisp = cpos_buffer_position - wrap_offset; | |
1237 | nleft = prompt_visible_length + wrap_offset; | |
1238 | /* Where the new cursor position will be on the screen. This can be | |
1239 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ | |
1240 | phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset); | |
1241 | t = _rl_screenwidth / 3; | |
1242 | ||
1243 | /* If the number of characters had already exceeded the screenwidth, | |
1244 | last_lmargin will be > 0. */ | |
1245 | ||
1246 | /* If the number of characters to be displayed is more than the screen | |
1247 | width, compute the starting offset so that the cursor is about | |
1248 | two-thirds of the way across the screen. */ | |
1249 | if (phys_c_pos > _rl_screenwidth - 2) | |
1250 | { | |
1251 | lmargin = cpos_buffer_position - (2 * t); | |
1252 | if (lmargin < 0) | |
1253 | lmargin = 0; | |
1254 | /* If the left margin would be in the middle of a prompt with | |
1255 | invisible characters, don't display the prompt at all. */ | |
1256 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1257 | lmargin = nleft; | |
1258 | } | |
1259 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ | |
1260 | lmargin = 0; | |
1261 | else if (phys_c_pos < 1) | |
1262 | { | |
1263 | /* If we are moving back towards the beginning of the line and | |
1264 | the last margin is no longer correct, compute a new one. */ | |
1265 | lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */ | |
1266 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1267 | lmargin = nleft; | |
1268 | } | |
1269 | else | |
1270 | lmargin = last_lmargin; | |
1271 | ||
1272 | displaying_prompt_first_line = lmargin < nleft; | |
1273 | ||
1274 | /* If the first character on the screen isn't the first character | |
1275 | in the display line, indicate this with a special character. */ | |
1276 | if (lmargin > 0) | |
1277 | line[lmargin] = '<'; | |
1278 | ||
1279 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
1280 | the whole line, indicate that with a special character at the | |
1281 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1282 | wrap offset into account. */ | |
1283 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; | |
1284 | if (t < out) | |
1285 | line[t - 1] = '>'; | |
1286 | ||
1287 | if (rl_display_fixed == 0 || forced_display || lmargin != last_lmargin) | |
1288 | { | |
1289 | forced_display = 0; | |
1290 | o_cpos = _rl_last_c_pos; | |
1291 | cpos_adjusted = 0; | |
1292 | update_line (&visible_line[last_lmargin], | |
1293 | &invisible_line[lmargin], | |
1294 | 0, | |
1295 | _rl_screenwidth + visible_wrap_offset, | |
1296 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
1297 | 0); | |
1298 | ||
1299 | if ((mb_cur_max > 1 && rl_byte_oriented == 0) && | |
1300 | displaying_prompt_first_line && OLD_CPOS_IN_PROMPT()) | |
1301 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ | |
1302 | ||
1303 | /* If the visible new line is shorter than the old, but the number | |
1304 | of invisible characters is greater, and we are at the end of | |
1305 | the new line, we need to clear to eol. */ | |
1306 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1307 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1308 | (_rl_last_c_pos == out) && displaying_prompt_first_line && | |
1309 | t < visible_first_line_len) | |
1310 | { | |
1311 | nleft = _rl_screenwidth - t; | |
1312 | _rl_clear_to_eol (nleft); | |
1313 | } | |
1314 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
1315 | if (visible_first_line_len > _rl_screenwidth) | |
1316 | visible_first_line_len = _rl_screenwidth; | |
1317 | ||
1318 | _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]); | |
1319 | last_lmargin = lmargin; | |
1320 | } | |
1321 | } | |
1322 | fflush (rl_outstream); | |
1323 | ||
1324 | /* Swap visible and non-visible lines. */ | |
1325 | { | |
1326 | struct line_state *vtemp = line_state_visible; | |
1327 | ||
1328 | line_state_visible = line_state_invisible; | |
1329 | line_state_invisible = vtemp; | |
1330 | ||
1331 | rl_display_fixed = 0; | |
1332 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1333 | are not displaying any invisible characters, so set visible_wrap_offset | |
1334 | to 0. */ | |
1335 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1336 | visible_wrap_offset = 0; | |
1337 | else | |
1338 | visible_wrap_offset = wrap_offset; | |
1339 | } | |
1340 | ||
1341 | RL_UNSETSTATE (RL_STATE_REDISPLAYING); | |
1342 | _rl_release_sigint (); | |
1343 | } | |
1344 | ||
1345 | /* PWP: update_line() is based on finding the middle difference of each | |
1346 | line on the screen; vis: | |
1347 | ||
1348 | /old first difference | |
1349 | /beginning of line | /old last same /old EOL | |
1350 | v v v v | |
1351 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1352 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1353 | ^ ^ ^ ^ | |
1354 | \beginning of line | \new last same \new end of line | |
1355 | \new first difference | |
1356 | ||
1357 | All are character pointers for the sake of speed. Special cases for | |
1358 | no differences, as well as for end of line additions must be handled. | |
1359 | ||
1360 | Could be made even smarter, but this works well enough */ | |
1361 | static void | |
1362 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1363 | register char *old, *new; | |
1364 | int current_line, omax, nmax, inv_botlin; | |
1365 | { | |
1366 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
1367 | int temp, lendiff, wsatend, od, nd, twidth, o_cpos; | |
1368 | int current_invis_chars; | |
1369 | int col_lendiff, col_temp; | |
1370 | int bytes_to_insert; | |
1371 | #if defined (HANDLE_MULTIBYTE) | |
1372 | mbstate_t ps_new, ps_old; | |
1373 | int new_offset, old_offset; | |
1374 | #endif | |
1375 | ||
1376 | /* If we're at the right edge of a terminal that supports xn, we're | |
1377 | ready to wrap around, so do so. This fixes problems with knowing | |
1378 | the exact cursor position and cut-and-paste with certain terminal | |
1379 | emulators. In this calculation, TEMP is the physical screen | |
1380 | position of the cursor. */ | |
1381 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1382 | temp = _rl_last_c_pos; | |
1383 | else | |
1384 | temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset); | |
1385 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode | |
1386 | && _rl_last_v_pos == current_line - 1) | |
1387 | { | |
1388 | #if defined (HANDLE_MULTIBYTE) | |
1389 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1390 | { | |
1391 | wchar_t wc; | |
1392 | mbstate_t ps; | |
1393 | int tempwidth, bytes; | |
1394 | size_t ret; | |
1395 | ||
1396 | /* This fixes only double-column characters, but if the wrapped | |
1397 | character consumes more than three columns, spaces will be | |
1398 | inserted in the string buffer. */ | |
1399 | if (current_line < line_state_visible->wbsize && line_state_visible->wrapped_line[current_line] > 0) | |
1400 | _rl_clear_to_eol (line_state_visible->wrapped_line[current_line]); | |
1401 | ||
1402 | memset (&ps, 0, sizeof (mbstate_t)); | |
1403 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
1404 | if (MB_INVALIDCH (ret)) | |
1405 | { | |
1406 | tempwidth = 1; | |
1407 | ret = 1; | |
1408 | } | |
1409 | else if (MB_NULLWCH (ret)) | |
1410 | tempwidth = 0; | |
1411 | else | |
1412 | tempwidth = WCWIDTH (wc); | |
1413 | ||
1414 | if (tempwidth > 0) | |
1415 | { | |
1416 | int count, i; | |
1417 | bytes = ret; | |
1418 | for (count = 0; count < bytes; count++) | |
1419 | putc (new[count], rl_outstream); | |
1420 | _rl_last_c_pos = tempwidth; | |
1421 | _rl_last_v_pos++; | |
1422 | memset (&ps, 0, sizeof (mbstate_t)); | |
1423 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1424 | if (ret != 0 && bytes != 0) | |
1425 | { | |
1426 | if (MB_INVALIDCH (ret)) | |
1427 | ret = 1; | |
1428 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1429 | memcpy (old, new, bytes); | |
1430 | /* Fix up indices if we copy data from one line to another */ | |
1431 | omax += bytes - ret; | |
1432 | for (i = current_line+1; i <= inv_botlin+1; i++) | |
1433 | vis_lbreaks[i] += bytes - ret; | |
1434 | } | |
1435 | } | |
1436 | else | |
1437 | { | |
1438 | putc (' ', rl_outstream); | |
1439 | _rl_last_c_pos = 1; | |
1440 | _rl_last_v_pos++; | |
1441 | if (old[0] && new[0]) | |
1442 | old[0] = new[0]; | |
1443 | } | |
1444 | } | |
1445 | else | |
1446 | #endif | |
1447 | { | |
1448 | if (new[0]) | |
1449 | putc (new[0], rl_outstream); | |
1450 | else | |
1451 | putc (' ', rl_outstream); | |
1452 | _rl_last_c_pos = 1; | |
1453 | _rl_last_v_pos++; | |
1454 | if (old[0] && new[0]) | |
1455 | old[0] = new[0]; | |
1456 | } | |
1457 | } | |
1458 | ||
1459 | ||
1460 | /* Find first difference. */ | |
1461 | #if defined (HANDLE_MULTIBYTE) | |
1462 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1463 | { | |
1464 | /* See if the old line is a subset of the new line, so that the | |
1465 | only change is adding characters. */ | |
1466 | temp = (omax < nmax) ? omax : nmax; | |
1467 | if (memcmp (old, new, temp) == 0) /* adding at the end */ | |
1468 | { | |
1469 | new_offset = old_offset = temp; | |
1470 | ofd = old + temp; | |
1471 | nfd = new + temp; | |
1472 | } | |
1473 | else | |
1474 | { | |
1475 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1476 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1477 | ||
1478 | if (omax == nmax && STREQN (new, old, omax)) | |
1479 | { | |
1480 | old_offset = omax; | |
1481 | new_offset = nmax; | |
1482 | ofd = old + omax; | |
1483 | nfd = new + nmax; | |
1484 | } | |
1485 | else | |
1486 | { | |
1487 | new_offset = old_offset = 0; | |
1488 | for (ofd = old, nfd = new; | |
1489 | (ofd - old < omax) && *ofd && | |
1490 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1491 | { | |
1492 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1493 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1494 | ||
1495 | ofd = old + old_offset; | |
1496 | nfd = new + new_offset; | |
1497 | } | |
1498 | } | |
1499 | } | |
1500 | } | |
1501 | else | |
1502 | #endif | |
1503 | for (ofd = old, nfd = new; | |
1504 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1505 | ofd++, nfd++) | |
1506 | ; | |
1507 | ||
1508 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1509 | of the distance between ne and new and oe and old, respectively, to | |
1510 | move a subtraction out of each loop. */ | |
1511 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1512 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1513 | ||
1514 | /* If no difference, continue to next line. */ | |
1515 | if (ofd == oe && nfd == ne) | |
1516 | return; | |
1517 | ||
1518 | #if defined (HANDLE_MULTIBYTE) | |
1519 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && _rl_utf8locale) | |
1520 | { | |
1521 | wchar_t wc; | |
1522 | mbstate_t ps = { 0 }; | |
1523 | int t; | |
1524 | ||
1525 | /* If the first character in the difference is a zero-width character, | |
1526 | assume it's a combining character and back one up so the two base | |
1527 | characters no longer compare equivalently. */ | |
1528 | t = mbrtowc (&wc, ofd, MB_CUR_MAX, &ps); | |
1529 | if (t > 0 && UNICODE_COMBINING_CHAR (wc) && WCWIDTH (wc) == 0) | |
1530 | { | |
1531 | old_offset = _rl_find_prev_mbchar (old, ofd - old, MB_FIND_ANY); | |
1532 | new_offset = _rl_find_prev_mbchar (new, nfd - new, MB_FIND_ANY); | |
1533 | ofd = old + old_offset; /* equal by definition */ | |
1534 | nfd = new + new_offset; | |
1535 | } | |
1536 | } | |
1537 | #endif | |
1538 | ||
1539 | wsatend = 1; /* flag for trailing whitespace */ | |
1540 | ||
1541 | #if defined (HANDLE_MULTIBYTE) | |
1542 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1543 | { | |
1544 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1545 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1546 | ||
1547 | while ((ols > ofd) && (nls > nfd)) | |
1548 | { | |
1549 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1550 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1551 | ||
1552 | #if 0 | |
1553 | /* On advice from jir@yamato.ibm.com */ | |
1554 | _rl_adjust_point (old, ols - old, &ps_old); | |
1555 | _rl_adjust_point (new, nls - new, &ps_new); | |
1556 | #endif | |
1557 | ||
1558 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1559 | break; | |
1560 | ||
1561 | if (*ols == ' ') | |
1562 | wsatend = 0; | |
1563 | ||
1564 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1565 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1566 | } | |
1567 | } | |
1568 | else | |
1569 | { | |
1570 | #endif /* HANDLE_MULTIBYTE */ | |
1571 | ols = oe - 1; /* find last same */ | |
1572 | nls = ne - 1; | |
1573 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1574 | { | |
1575 | if (*ols != ' ') | |
1576 | wsatend = 0; | |
1577 | ols--; | |
1578 | nls--; | |
1579 | } | |
1580 | #if defined (HANDLE_MULTIBYTE) | |
1581 | } | |
1582 | #endif | |
1583 | ||
1584 | if (wsatend) | |
1585 | { | |
1586 | ols = oe; | |
1587 | nls = ne; | |
1588 | } | |
1589 | #if defined (HANDLE_MULTIBYTE) | |
1590 | /* This may not work for stateful encoding, but who cares? To handle | |
1591 | stateful encoding properly, we have to scan each string from the | |
1592 | beginning and compare. */ | |
1593 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1594 | #else | |
1595 | else if (*ols != *nls) | |
1596 | #endif | |
1597 | { | |
1598 | if (*ols) /* don't step past the NUL */ | |
1599 | { | |
1600 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1601 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1602 | else | |
1603 | ols++; | |
1604 | } | |
1605 | if (*nls) | |
1606 | { | |
1607 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1608 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1609 | else | |
1610 | nls++; | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | /* count of invisible characters in the current invisible line. */ | |
1615 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1616 | if (_rl_last_v_pos != current_line) | |
1617 | { | |
1618 | _rl_move_vert (current_line); | |
1619 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) | |
1620 | _rl_last_c_pos += visible_wrap_offset; | |
1621 | } | |
1622 | ||
1623 | /* If this is the first line and there are invisible characters in the | |
1624 | prompt string, and the prompt string has not changed, and the current | |
1625 | cursor position is before the last invisible character in the prompt, | |
1626 | and the index of the character to move to is past the end of the prompt | |
1627 | string, then redraw the entire prompt string. We can only do this | |
1628 | reliably if the terminal supports a `cr' capability. | |
1629 | ||
1630 | This is not an efficiency hack -- there is a problem with redrawing | |
1631 | portions of the prompt string if they contain terminal escape | |
1632 | sequences (like drawing the `unbold' sequence without a corresponding | |
1633 | `bold') that manifests itself on certain terminals. */ | |
1634 | ||
1635 | lendiff = local_prompt_len; | |
1636 | od = ofd - old; /* index of first difference in visible line */ | |
1637 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1638 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && | |
1639 | od >= lendiff && _rl_last_c_pos < PROMPT_ENDING_INDEX) | |
1640 | { | |
1641 | #if defined (__MSDOS__) | |
1642 | putc ('\r', rl_outstream); | |
1643 | #else | |
1644 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1645 | #endif | |
1646 | if (modmark) | |
1647 | _rl_output_some_chars ("*", 1); | |
1648 | _rl_output_some_chars (local_prompt, lendiff); | |
1649 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1650 | { | |
1651 | /* We take wrap_offset into account here so we can pass correct | |
1652 | information to _rl_move_cursor_relative. */ | |
1653 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff, 1) - wrap_offset + modmark; | |
1654 | cpos_adjusted = 1; | |
1655 | } | |
1656 | else | |
1657 | _rl_last_c_pos = lendiff + modmark; | |
1658 | } | |
1659 | ||
1660 | o_cpos = _rl_last_c_pos; | |
1661 | ||
1662 | /* When this function returns, _rl_last_c_pos is correct, and an absolute | |
1663 | cursor position in multibyte mode, but a buffer index when not in a | |
1664 | multibyte locale. */ | |
1665 | _rl_move_cursor_relative (od, old); | |
1666 | ||
1667 | #if defined (HANDLE_MULTIBYTE) | |
1668 | /* We need to indicate that the cursor position is correct in the presence of | |
1669 | invisible characters in the prompt string. Let's see if setting this when | |
1670 | we make sure we're at the end of the drawn prompt string works. */ | |
1671 | if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 && | |
1672 | (_rl_last_c_pos > 0 || o_cpos > 0) && | |
1673 | _rl_last_c_pos == prompt_physical_chars) | |
1674 | cpos_adjusted = 1; | |
1675 | #endif | |
1676 | ||
1677 | /* if (len (new) > len (old)) | |
1678 | lendiff == difference in buffer (bytes) | |
1679 | col_lendiff == difference on screen (columns) | |
1680 | When not using multibyte characters, these are equal */ | |
1681 | lendiff = (nls - nfd) - (ols - ofd); | |
1682 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1683 | col_lendiff = _rl_col_width (new, nfd - new, nls - new, 1) - _rl_col_width (old, ofd - old, ols - old, 1); | |
1684 | else | |
1685 | col_lendiff = lendiff; | |
1686 | ||
1687 | /* If we are changing the number of invisible characters in a line, and | |
1688 | the spot of first difference is before the end of the invisible chars, | |
1689 | lendiff needs to be adjusted. */ | |
1690 | if (current_line == 0 && /* !_rl_horizontal_scroll_mode && */ | |
1691 | current_invis_chars != visible_wrap_offset) | |
1692 | { | |
1693 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1694 | { | |
1695 | lendiff += visible_wrap_offset - current_invis_chars; | |
1696 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1697 | } | |
1698 | else | |
1699 | { | |
1700 | lendiff += visible_wrap_offset - current_invis_chars; | |
1701 | col_lendiff = lendiff; | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | /* We use temp as a count of the number of bytes from the first difference | |
1706 | to the end of the new line. col_temp is the corresponding number of | |
1707 | screen columns. A `dumb' update moves to the spot of first difference | |
1708 | and writes TEMP bytes. */ | |
1709 | /* Insert (diff (len (old), len (new)) ch. */ | |
1710 | temp = ne - nfd; | |
1711 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1712 | col_temp = _rl_col_width (new, nfd - new, ne - new, 1); | |
1713 | else | |
1714 | col_temp = temp; | |
1715 | ||
1716 | /* how many bytes from the new line buffer to write to the display */ | |
1717 | bytes_to_insert = nls - nfd; | |
1718 | ||
1719 | /* col_lendiff > 0 if we are adding characters to the line */ | |
1720 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
1721 | { | |
1722 | /* Non-zero if we're increasing the number of lines. */ | |
1723 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1724 | /* If col_lendiff is > 0, implying that the new string takes up more | |
1725 | screen real estate than the old, but lendiff is < 0, meaning that it | |
1726 | takes fewer bytes, we need to just output the characters starting | |
1727 | from the first difference. These will overwrite what is on the | |
1728 | display, so there's no reason to do a smart update. This can really | |
1729 | only happen in a multibyte environment. */ | |
1730 | if (lendiff < 0) | |
1731 | { | |
1732 | _rl_output_some_chars (nfd, temp); | |
1733 | _rl_last_c_pos += col_temp; /* XXX - was _rl_col_width (nfd, 0, temp, 1); */ | |
1734 | /* If nfd begins before any invisible characters in the prompt, | |
1735 | adjust _rl_last_c_pos to account for wrap_offset and set | |
1736 | cpos_adjusted to let the caller know. */ | |
1737 | if (current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
1738 | { | |
1739 | _rl_last_c_pos -= wrap_offset; | |
1740 | cpos_adjusted = 1; | |
1741 | } | |
1742 | return; | |
1743 | } | |
1744 | /* Sometimes it is cheaper to print the characters rather than | |
1745 | use the terminal's capabilities. If we're growing the number | |
1746 | of lines, make sure we actually cause the new line to wrap | |
1747 | around on auto-wrapping terminals. */ | |
1748 | else if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) | |
1749 | { | |
1750 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and | |
1751 | _rl_horizontal_scroll_mode == 1, inserting the characters with | |
1752 | _rl_term_IC or _rl_term_ic will screw up the screen because of the | |
1753 | invisible characters. We need to just draw them. */ | |
1754 | /* The same thing happens if we're trying to draw before the last | |
1755 | invisible character in the prompt string or we're increasing the | |
1756 | number of invisible characters in the line and we're not drawing | |
1757 | the entire prompt string. */ | |
1758 | if (*ols && ((_rl_horizontal_scroll_mode && | |
1759 | _rl_last_c_pos == 0 && | |
1760 | lendiff > prompt_visible_length && | |
1761 | current_invis_chars > 0) == 0) && | |
1762 | (((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && | |
1763 | current_line == 0 && wrap_offset && | |
1764 | ((nfd - new) <= prompt_last_invisible) && | |
1765 | (col_lendiff < prompt_visible_length)) == 0) && | |
1766 | (visible_wrap_offset >= current_invis_chars)) | |
1767 | { | |
1768 | open_some_spaces (col_lendiff); | |
1769 | _rl_output_some_chars (nfd, bytes_to_insert); | |
1770 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1771 | _rl_last_c_pos += _rl_col_width (nfd, 0, bytes_to_insert, 1); | |
1772 | else | |
1773 | _rl_last_c_pos += bytes_to_insert; | |
1774 | } | |
1775 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) | |
1776 | { | |
1777 | /* At the end of a line the characters do not have to | |
1778 | be "inserted". They can just be placed on the screen. */ | |
1779 | _rl_output_some_chars (nfd, temp); | |
1780 | _rl_last_c_pos += col_temp; | |
1781 | return; | |
1782 | } | |
1783 | else /* just write from first difference to end of new line */ | |
1784 | { | |
1785 | _rl_output_some_chars (nfd, temp); | |
1786 | _rl_last_c_pos += col_temp; | |
1787 | /* If nfd begins before the last invisible character in the | |
1788 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1789 | and set cpos_adjusted to let the caller know. */ | |
1790 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
1791 | { | |
1792 | _rl_last_c_pos -= wrap_offset; | |
1793 | cpos_adjusted = 1; | |
1794 | } | |
1795 | return; | |
1796 | } | |
1797 | ||
1798 | if (bytes_to_insert > lendiff) | |
1799 | { | |
1800 | /* If nfd begins before the last invisible character in the | |
1801 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1802 | and set cpos_adjusted to let the caller know. */ | |
1803 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
1804 | { | |
1805 | _rl_last_c_pos -= wrap_offset; | |
1806 | cpos_adjusted = 1; | |
1807 | } | |
1808 | } | |
1809 | } | |
1810 | else | |
1811 | { | |
1812 | /* cannot insert chars, write to EOL */ | |
1813 | _rl_output_some_chars (nfd, temp); | |
1814 | _rl_last_c_pos += col_temp; | |
1815 | /* If we're in a multibyte locale and were before the last invisible | |
1816 | char in the current line (which implies we just output some invisible | |
1817 | characters) we need to adjust _rl_last_c_pos, since it represents | |
1818 | a physical character position. */ | |
1819 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && | |
1820 | current_line == prompt_last_screen_line && wrap_offset && | |
1821 | displaying_prompt_first_line && | |
1822 | wrap_offset != prompt_invis_chars_first_line && | |
1823 | ((nfd-new) < (prompt_last_invisible-(current_line*_rl_screenwidth)))) | |
1824 | { | |
1825 | _rl_last_c_pos -= wrap_offset - prompt_invis_chars_first_line; | |
1826 | cpos_adjusted = 1; | |
1827 | } | |
1828 | } | |
1829 | } | |
1830 | else /* Delete characters from line. */ | |
1831 | { | |
1832 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
1833 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) | |
1834 | { | |
1835 | /* If all we're doing is erasing the invisible characters in the | |
1836 | prompt string, don't bother. It screws up the assumptions | |
1837 | about what's on the screen. */ | |
1838 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1839 | displaying_prompt_first_line && | |
1840 | -lendiff == visible_wrap_offset) | |
1841 | col_lendiff = 0; | |
1842 | ||
1843 | /* If we have moved lmargin and we're shrinking the line, we've | |
1844 | already moved the cursor to the first character of the new line, | |
1845 | so deleting -col_lendiff characters will mess up the cursor | |
1846 | position calculation */ | |
1847 | if (_rl_horizontal_scroll_mode && displaying_prompt_first_line == 0 && | |
1848 | col_lendiff && _rl_last_c_pos < -col_lendiff) | |
1849 | col_lendiff = 0; | |
1850 | ||
1851 | if (col_lendiff) | |
1852 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
1853 | ||
1854 | /* Copy (new) chars to screen from first diff to last match, | |
1855 | overwriting what is there. */ | |
1856 | if (bytes_to_insert > 0) | |
1857 | { | |
1858 | /* If nfd begins at the prompt, or before the invisible | |
1859 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1860 | in a multibyte locale to account for the wrap offset and | |
1861 | set cpos_adjusted accordingly. */ | |
1862 | _rl_output_some_chars (nfd, bytes_to_insert); | |
1863 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1864 | { | |
1865 | _rl_last_c_pos += _rl_col_width (nfd, 0, bytes_to_insert, 1); | |
1866 | if (current_line == 0 && wrap_offset && | |
1867 | displaying_prompt_first_line && | |
1868 | _rl_last_c_pos > wrap_offset && | |
1869 | ((nfd - new) <= prompt_last_invisible)) | |
1870 | { | |
1871 | _rl_last_c_pos -= wrap_offset; | |
1872 | cpos_adjusted = 1; | |
1873 | } | |
1874 | } | |
1875 | else | |
1876 | _rl_last_c_pos += bytes_to_insert; | |
1877 | ||
1878 | /* XXX - we only want to do this if we are at the end of the line | |
1879 | so we move there with _rl_move_cursor_relative */ | |
1880 | if (_rl_horizontal_scroll_mode && ((oe-old) > (ne-new))) | |
1881 | { | |
1882 | _rl_move_cursor_relative (ne-new, new); | |
1883 | goto clear_rest_of_line; | |
1884 | } | |
1885 | } | |
1886 | } | |
1887 | /* Otherwise, print over the existing material. */ | |
1888 | else | |
1889 | { | |
1890 | if (temp > 0) | |
1891 | { | |
1892 | /* If nfd begins at the prompt, or before the invisible | |
1893 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1894 | in a multibyte locale to account for the wrap offset and | |
1895 | set cpos_adjusted accordingly. */ | |
1896 | _rl_output_some_chars (nfd, temp); | |
1897 | _rl_last_c_pos += col_temp; /* XXX */ | |
1898 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1899 | { | |
1900 | if (current_line == 0 && wrap_offset && | |
1901 | displaying_prompt_first_line && | |
1902 | _rl_last_c_pos > wrap_offset && | |
1903 | ((nfd - new) <= prompt_last_invisible)) | |
1904 | { | |
1905 | _rl_last_c_pos -= wrap_offset; | |
1906 | cpos_adjusted = 1; | |
1907 | } | |
1908 | } | |
1909 | } | |
1910 | clear_rest_of_line: | |
1911 | lendiff = (oe - old) - (ne - new); | |
1912 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1913 | col_lendiff = _rl_col_width (old, 0, oe - old, 1) - _rl_col_width (new, 0, ne - new, 1); | |
1914 | else | |
1915 | col_lendiff = lendiff; | |
1916 | ||
1917 | /* If we've already printed over the entire width of the screen, | |
1918 | including the old material, then col_lendiff doesn't matter and | |
1919 | space_to_eol will insert too many spaces. XXX - maybe we should | |
1920 | adjust col_lendiff based on the difference between _rl_last_c_pos | |
1921 | and _rl_screenwidth */ | |
1922 | if (col_lendiff && ((MB_CUR_MAX == 1 || rl_byte_oriented) || (_rl_last_c_pos < _rl_screenwidth))) | |
1923 | { | |
1924 | if (_rl_term_autowrap && current_line < inv_botlin) | |
1925 | space_to_eol (col_lendiff); | |
1926 | else | |
1927 | _rl_clear_to_eol (col_lendiff); | |
1928 | } | |
1929 | } | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
1934 | int | |
1935 | rl_on_new_line () | |
1936 | { | |
1937 | if (visible_line) | |
1938 | visible_line[0] = '\0'; | |
1939 | ||
1940 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1941 | _rl_vis_botlin = last_lmargin = 0; | |
1942 | if (vis_lbreaks) | |
1943 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1944 | visible_wrap_offset = 0; | |
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | /* Tell the update routines that we have moved onto a new line with the | |
1949 | prompt already displayed. Code originally from the version of readline | |
1950 | distributed with CLISP. rl_expand_prompt must have already been called | |
1951 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
1952 | int | |
1953 | rl_on_new_line_with_prompt () | |
1954 | { | |
1955 | int prompt_size, i, l, real_screenwidth, newlines; | |
1956 | char *prompt_last_line, *lprompt; | |
1957 | ||
1958 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1959 | the already-displayed prompt. */ | |
1960 | prompt_size = strlen (rl_prompt) + 1; | |
1961 | init_line_structures (prompt_size); | |
1962 | ||
1963 | /* Make sure the line structures hold the already-displayed prompt for | |
1964 | redisplay. */ | |
1965 | lprompt = local_prompt ? local_prompt : rl_prompt; | |
1966 | strcpy (visible_line, lprompt); | |
1967 | strcpy (invisible_line, lprompt); | |
1968 | ||
1969 | /* If the prompt contains newlines, take the last tail. */ | |
1970 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1971 | if (!prompt_last_line) | |
1972 | prompt_last_line = rl_prompt; | |
1973 | ||
1974 | l = strlen (prompt_last_line); | |
1975 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1976 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l, 1); /* XXX */ | |
1977 | else | |
1978 | _rl_last_c_pos = l; | |
1979 | ||
1980 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1981 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1982 | one less, see terminal.c. */ | |
1983 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); | |
1984 | _rl_last_v_pos = l / real_screenwidth; | |
1985 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1986 | whether the cursor is at the end of the last line, or already at the | |
1987 | beginning of the next line. Output a newline just to be safe. */ | |
1988 | if (l > 0 && (l % real_screenwidth) == 0) | |
1989 | _rl_output_some_chars ("\n", 1); | |
1990 | last_lmargin = 0; | |
1991 | ||
1992 | newlines = 0; i = 0; | |
1993 | while (i <= l) | |
1994 | { | |
1995 | _rl_vis_botlin = newlines; | |
1996 | vis_lbreaks[newlines++] = i; | |
1997 | i += real_screenwidth; | |
1998 | } | |
1999 | vis_lbreaks[newlines] = l; | |
2000 | visible_wrap_offset = 0; | |
2001 | ||
2002 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ | |
2003 | ||
2004 | return 0; | |
2005 | } | |
2006 | ||
2007 | /* Actually update the display, period. */ | |
2008 | int | |
2009 | rl_forced_update_display () | |
2010 | { | |
2011 | register char *temp; | |
2012 | ||
2013 | if (visible_line) | |
2014 | { | |
2015 | temp = visible_line; | |
2016 | while (*temp) | |
2017 | *temp++ = '\0'; | |
2018 | } | |
2019 | rl_on_new_line (); | |
2020 | forced_display++; | |
2021 | (*rl_redisplay_function) (); | |
2022 | return 0; | |
2023 | } | |
2024 | ||
2025 | /* Redraw only the last line of a multi-line prompt. */ | |
2026 | void | |
2027 | rl_redraw_prompt_last_line () | |
2028 | { | |
2029 | char *t; | |
2030 | ||
2031 | t = strrchr (rl_display_prompt, '\n'); | |
2032 | if (t) | |
2033 | redraw_prompt (++t); | |
2034 | else | |
2035 | rl_forced_update_display (); | |
2036 | } | |
2037 | ||
2038 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
2039 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a | |
2040 | buffer index.) | |
2041 | DATA is the contents of the screen line of interest; i.e., where | |
2042 | the movement is being done. */ | |
2043 | void | |
2044 | _rl_move_cursor_relative (new, data) | |
2045 | int new; | |
2046 | const char *data; | |
2047 | { | |
2048 | register int i; | |
2049 | int woff; /* number of invisible chars on current line */ | |
2050 | int cpos, dpos; /* current and desired cursor positions */ | |
2051 | int adjust; | |
2052 | ||
2053 | woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset); | |
2054 | cpos = _rl_last_c_pos; | |
2055 | ||
2056 | if (cpos == 0 && cpos == new) | |
2057 | return; | |
2058 | ||
2059 | #if defined (HANDLE_MULTIBYTE) | |
2060 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
2061 | a multibyte string, but _rl_last_c_pos is the display position. In | |
2062 | this case, NEW's display position is not obvious and must be | |
2063 | calculated. We need to account for invisible characters in this line, | |
2064 | as long as we are past them and they are counted by _rl_col_width. */ | |
2065 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
2066 | { | |
2067 | adjust = 1; | |
2068 | /* Try to short-circuit common cases and eliminate a bunch of multibyte | |
2069 | character function calls. */ | |
2070 | /* 1. prompt string */ | |
2071 | if (new == local_prompt_len && memcmp (data, local_prompt, new) == 0) | |
2072 | { | |
2073 | dpos = prompt_physical_chars; | |
2074 | cpos_adjusted = 1; | |
2075 | adjust = 0; | |
2076 | } | |
2077 | /* 2. prompt_string + line contents */ | |
2078 | else if (new > local_prompt_len && local_prompt && memcmp (data, local_prompt, local_prompt_len) == 0) | |
2079 | { | |
2080 | dpos = prompt_physical_chars + _rl_col_width (data, local_prompt_len, new, 1); | |
2081 | cpos_adjusted = 1; | |
2082 | adjust = 0; | |
2083 | } | |
2084 | else | |
2085 | dpos = _rl_col_width (data, 0, new, 1); | |
2086 | ||
2087 | if (displaying_prompt_first_line == 0) | |
2088 | adjust = 0; | |
2089 | ||
2090 | /* Use NEW when comparing against the last invisible character in the | |
2091 | prompt string, since they're both buffer indices and DPOS is a | |
2092 | desired display position. */ | |
2093 | if (adjust && ((new > prompt_last_invisible) || /* XXX - don't use woff here */ | |
2094 | (prompt_physical_chars >= _rl_screenwidth && | |
2095 | _rl_last_v_pos == prompt_last_screen_line && | |
2096 | wrap_offset >= woff && dpos >= woff && | |
2097 | new > (prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset)))) | |
2098 | /* XXX last comparison might need to be >= */ | |
2099 | { | |
2100 | dpos -= woff; | |
2101 | /* Since this will be assigned to _rl_last_c_pos at the end (more | |
2102 | precisely, _rl_last_c_pos == dpos when this function returns), | |
2103 | let the caller know. */ | |
2104 | cpos_adjusted = 1; | |
2105 | } | |
2106 | } | |
2107 | else | |
2108 | #endif | |
2109 | dpos = new; | |
2110 | ||
2111 | /* If we don't have to do anything, then return. */ | |
2112 | if (cpos == dpos) | |
2113 | return; | |
2114 | ||
2115 | /* It may be faster to output a CR, and then move forwards instead | |
2116 | of moving backwards. */ | |
2117 | /* i == current physical cursor position. */ | |
2118 | #if defined (HANDLE_MULTIBYTE) | |
2119 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
2120 | i = _rl_last_c_pos; | |
2121 | else | |
2122 | #endif | |
2123 | i = _rl_last_c_pos - woff; | |
2124 | if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) || | |
2125 | (_rl_term_autowrap && i == _rl_screenwidth)) | |
2126 | { | |
2127 | #if defined (__MSDOS__) | |
2128 | putc ('\r', rl_outstream); | |
2129 | #else | |
2130 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2131 | #endif /* !__MSDOS__ */ | |
2132 | cpos = _rl_last_c_pos = 0; | |
2133 | } | |
2134 | ||
2135 | if (cpos < dpos) | |
2136 | { | |
2137 | /* Move the cursor forward. We do it by printing the command | |
2138 | to move the cursor forward if there is one, else print that | |
2139 | portion of the output buffer again. Which is cheaper? */ | |
2140 | ||
2141 | /* The above comment is left here for posterity. It is faster | |
2142 | to print one character (non-control) than to print a control | |
2143 | sequence telling the terminal to move forward one character. | |
2144 | That kind of control is for people who don't know what the | |
2145 | data is underneath the cursor. */ | |
2146 | ||
2147 | /* However, we need a handle on where the current display position is | |
2148 | in the buffer for the immediately preceding comment to be true. | |
2149 | In multibyte locales, we don't currently have that info available. | |
2150 | Without it, we don't know where the data we have to display begins | |
2151 | in the buffer and we have to go back to the beginning of the screen | |
2152 | line. In this case, we can use the terminal sequence to move forward | |
2153 | if it's available. */ | |
2154 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
2155 | { | |
2156 | if (_rl_term_forward_char) | |
2157 | { | |
2158 | for (i = cpos; i < dpos; i++) | |
2159 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
2160 | } | |
2161 | else | |
2162 | { | |
2163 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2164 | for (i = 0; i < new; i++) | |
2165 | putc (data[i], rl_outstream); | |
2166 | } | |
2167 | } | |
2168 | else | |
2169 | for (i = cpos; i < new; i++) | |
2170 | putc (data[i], rl_outstream); | |
2171 | } | |
2172 | ||
2173 | #if defined (HANDLE_MULTIBYTE) | |
2174 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
2175 | The byte length of the string is probably bigger than the column width | |
2176 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
2177 | display point is less than _rl_last_c_pos. */ | |
2178 | #endif | |
2179 | else if (cpos > dpos) | |
2180 | _rl_backspace (cpos - dpos); | |
2181 | ||
2182 | _rl_last_c_pos = dpos; | |
2183 | } | |
2184 | ||
2185 | /* PWP: move the cursor up or down. */ | |
2186 | void | |
2187 | _rl_move_vert (to) | |
2188 | int to; | |
2189 | { | |
2190 | register int delta, i; | |
2191 | ||
2192 | if (_rl_last_v_pos == to || to > _rl_screenheight) | |
2193 | return; | |
2194 | ||
2195 | if ((delta = to - _rl_last_v_pos) > 0) | |
2196 | { | |
2197 | for (i = 0; i < delta; i++) | |
2198 | putc ('\n', rl_outstream); | |
2199 | #if defined (__MSDOS__) | |
2200 | putc ('\r', rl_outstream); | |
2201 | #else | |
2202 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2203 | #endif | |
2204 | _rl_last_c_pos = 0; | |
2205 | } | |
2206 | else | |
2207 | { /* delta < 0 */ | |
2208 | #ifdef __DJGPP__ | |
2209 | int row, col; | |
2210 | ||
2211 | fflush (rl_outstream); | |
2212 | ScreenGetCursor (&row, &col); | |
2213 | ScreenSetCursor (row + delta, col); | |
2214 | i = -delta; | |
2215 | #else | |
2216 | if (_rl_term_up && *_rl_term_up) | |
2217 | for (i = 0; i < -delta; i++) | |
2218 | tputs (_rl_term_up, 1, _rl_output_character_function); | |
2219 | #endif /* !__DJGPP__ */ | |
2220 | } | |
2221 | ||
2222 | _rl_last_v_pos = to; /* Now TO is here */ | |
2223 | } | |
2224 | ||
2225 | /* Physically print C on rl_outstream. This is for functions which know | |
2226 | how to optimize the display. Return the number of characters output. */ | |
2227 | int | |
2228 | rl_show_char (c) | |
2229 | int c; | |
2230 | { | |
2231 | int n = 1; | |
2232 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
2233 | { | |
2234 | fprintf (rl_outstream, "M-"); | |
2235 | n += 2; | |
2236 | c = UNMETA (c); | |
2237 | } | |
2238 | ||
2239 | #if defined (DISPLAY_TABS) | |
2240 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) | |
2241 | #else | |
2242 | if (CTRL_CHAR (c) || c == RUBOUT) | |
2243 | #endif /* !DISPLAY_TABS */ | |
2244 | { | |
2245 | fprintf (rl_outstream, "C-"); | |
2246 | n += 2; | |
2247 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
2248 | } | |
2249 | ||
2250 | putc (c, rl_outstream); | |
2251 | fflush (rl_outstream); | |
2252 | return n; | |
2253 | } | |
2254 | ||
2255 | int | |
2256 | rl_character_len (c, pos) | |
2257 | register int c, pos; | |
2258 | { | |
2259 | unsigned char uc; | |
2260 | ||
2261 | uc = (unsigned char)c; | |
2262 | ||
2263 | if (META_CHAR (uc)) | |
2264 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
2265 | ||
2266 | if (uc == '\t') | |
2267 | { | |
2268 | #if defined (DISPLAY_TABS) | |
2269 | return (((pos | 7) + 1) - pos); | |
2270 | #else | |
2271 | return (2); | |
2272 | #endif /* !DISPLAY_TABS */ | |
2273 | } | |
2274 | ||
2275 | if (CTRL_CHAR (c) || c == RUBOUT) | |
2276 | return (2); | |
2277 | ||
2278 | return ((ISPRINT (uc)) ? 1 : 2); | |
2279 | } | |
2280 | /* How to print things in the "echo-area". The prompt is treated as a | |
2281 | mini-modeline. */ | |
2282 | static int msg_saved_prompt = 0; | |
2283 | ||
2284 | #if defined (USE_VARARGS) | |
2285 | int | |
2286 | #if defined (PREFER_STDARG) | |
2287 | rl_message (const char *format, ...) | |
2288 | #else | |
2289 | rl_message (va_alist) | |
2290 | va_dcl | |
2291 | #endif | |
2292 | { | |
2293 | va_list args; | |
2294 | #if defined (PREFER_VARARGS) | |
2295 | char *format; | |
2296 | #endif | |
2297 | #if defined (HAVE_VSNPRINTF) | |
2298 | int bneed; | |
2299 | #endif | |
2300 | ||
2301 | #if defined (PREFER_STDARG) | |
2302 | va_start (args, format); | |
2303 | #else | |
2304 | va_start (args); | |
2305 | format = va_arg (args, char *); | |
2306 | #endif | |
2307 | ||
2308 | if (msg_buf == 0) | |
2309 | msg_buf = xmalloc (msg_bufsiz = 128); | |
2310 | ||
2311 | #if defined (HAVE_VSNPRINTF) | |
2312 | bneed = vsnprintf (msg_buf, msg_bufsiz, format, args); | |
2313 | if (bneed >= msg_bufsiz - 1) | |
2314 | { | |
2315 | msg_bufsiz = bneed + 1; | |
2316 | msg_buf = xrealloc (msg_buf, msg_bufsiz); | |
2317 | va_end (args); | |
2318 | ||
2319 | #if defined (PREFER_STDARG) | |
2320 | va_start (args, format); | |
2321 | #else | |
2322 | va_start (args); | |
2323 | format = va_arg (args, char *); | |
2324 | #endif | |
2325 | vsnprintf (msg_buf, msg_bufsiz - 1, format, args); | |
2326 | } | |
2327 | #else | |
2328 | vsprintf (msg_buf, format, args); | |
2329 | msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */ | |
2330 | #endif | |
2331 | va_end (args); | |
2332 | ||
2333 | if (saved_local_prompt == 0) | |
2334 | { | |
2335 | rl_save_prompt (); | |
2336 | msg_saved_prompt = 1; | |
2337 | } | |
2338 | else if (local_prompt != saved_local_prompt) | |
2339 | { | |
2340 | FREE (local_prompt); | |
2341 | FREE (local_prompt_prefix); | |
2342 | local_prompt = (char *)NULL; | |
2343 | } | |
2344 | rl_display_prompt = msg_buf; | |
2345 | local_prompt = expand_prompt (msg_buf, 0, &prompt_visible_length, | |
2346 | &prompt_last_invisible, | |
2347 | &prompt_invis_chars_first_line, | |
2348 | &prompt_physical_chars); | |
2349 | local_prompt_prefix = (char *)NULL; | |
2350 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; | |
2351 | (*rl_redisplay_function) (); | |
2352 | ||
2353 | return 0; | |
2354 | } | |
2355 | #else /* !USE_VARARGS */ | |
2356 | int | |
2357 | rl_message (format, arg1, arg2) | |
2358 | char *format; | |
2359 | { | |
2360 | if (msg_buf == 0) | |
2361 | msg_buf = xmalloc (msg_bufsiz = 128); | |
2362 | ||
2363 | sprintf (msg_buf, format, arg1, arg2); | |
2364 | msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */ | |
2365 | ||
2366 | rl_display_prompt = msg_buf; | |
2367 | if (saved_local_prompt == 0) | |
2368 | { | |
2369 | rl_save_prompt (); | |
2370 | msg_saved_prompt = 1; | |
2371 | } | |
2372 | else if (local_prompt != saved_local_prompt) | |
2373 | { | |
2374 | FREE (local_prompt); | |
2375 | FREE (local_prompt_prefix); | |
2376 | local_prompt = (char *)NULL; | |
2377 | } | |
2378 | local_prompt = expand_prompt (msg_buf, 0, &prompt_visible_length, | |
2379 | &prompt_last_invisible, | |
2380 | &prompt_invis_chars_first_line, | |
2381 | &prompt_physical_chars); | |
2382 | local_prompt_prefix = (char *)NULL; | |
2383 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; | |
2384 | (*rl_redisplay_function) (); | |
2385 | ||
2386 | return 0; | |
2387 | } | |
2388 | #endif /* !USE_VARARGS */ | |
2389 | ||
2390 | /* How to clear things from the "echo-area". */ | |
2391 | int | |
2392 | rl_clear_message () | |
2393 | { | |
2394 | rl_display_prompt = rl_prompt; | |
2395 | if (msg_saved_prompt) | |
2396 | { | |
2397 | rl_restore_prompt (); | |
2398 | msg_saved_prompt = 0; | |
2399 | } | |
2400 | (*rl_redisplay_function) (); | |
2401 | return 0; | |
2402 | } | |
2403 | ||
2404 | int | |
2405 | rl_reset_line_state () | |
2406 | { | |
2407 | rl_on_new_line (); | |
2408 | ||
2409 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
2410 | forced_display = 1; | |
2411 | return 0; | |
2412 | } | |
2413 | ||
2414 | void | |
2415 | rl_save_prompt () | |
2416 | { | |
2417 | saved_local_prompt = local_prompt; | |
2418 | saved_local_prefix = local_prompt_prefix; | |
2419 | saved_prefix_length = prompt_prefix_length; | |
2420 | saved_local_length = local_prompt_len; | |
2421 | saved_last_invisible = prompt_last_invisible; | |
2422 | saved_visible_length = prompt_visible_length; | |
2423 | saved_invis_chars_first_line = prompt_invis_chars_first_line; | |
2424 | saved_physical_chars = prompt_physical_chars; | |
2425 | ||
2426 | local_prompt = local_prompt_prefix = (char *)0; | |
2427 | local_prompt_len = 0; | |
2428 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; | |
2429 | prompt_invis_chars_first_line = prompt_physical_chars = 0; | |
2430 | } | |
2431 | ||
2432 | void | |
2433 | rl_restore_prompt () | |
2434 | { | |
2435 | FREE (local_prompt); | |
2436 | FREE (local_prompt_prefix); | |
2437 | ||
2438 | local_prompt = saved_local_prompt; | |
2439 | local_prompt_prefix = saved_local_prefix; | |
2440 | local_prompt_len = saved_local_length; | |
2441 | prompt_prefix_length = saved_prefix_length; | |
2442 | prompt_last_invisible = saved_last_invisible; | |
2443 | prompt_visible_length = saved_visible_length; | |
2444 | prompt_invis_chars_first_line = saved_invis_chars_first_line; | |
2445 | prompt_physical_chars = saved_physical_chars; | |
2446 | ||
2447 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
2448 | saved_local_prompt = saved_local_prefix = (char *)0; | |
2449 | saved_local_length = 0; | |
2450 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; | |
2451 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
2452 | } | |
2453 | ||
2454 | char * | |
2455 | _rl_make_prompt_for_search (pchar) | |
2456 | int pchar; | |
2457 | { | |
2458 | int len; | |
2459 | char *pmt, *p; | |
2460 | ||
2461 | rl_save_prompt (); | |
2462 | ||
2463 | /* We've saved the prompt, and can do anything with the various prompt | |
2464 | strings we need before they're restored. We want the unexpanded | |
2465 | portion of the prompt string after any final newline. */ | |
2466 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; | |
2467 | if (p == 0) | |
2468 | { | |
2469 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
2470 | pmt = (char *)xmalloc (len + 2); | |
2471 | if (len) | |
2472 | strcpy (pmt, rl_prompt); | |
2473 | pmt[len] = pchar; | |
2474 | pmt[len+1] = '\0'; | |
2475 | } | |
2476 | else | |
2477 | { | |
2478 | p++; | |
2479 | len = strlen (p); | |
2480 | pmt = (char *)xmalloc (len + 2); | |
2481 | if (len) | |
2482 | strcpy (pmt, p); | |
2483 | pmt[len] = pchar; | |
2484 | pmt[len+1] = '\0'; | |
2485 | } | |
2486 | ||
2487 | /* will be overwritten by expand_prompt, called from rl_message */ | |
2488 | prompt_physical_chars = saved_physical_chars + 1; | |
2489 | return pmt; | |
2490 | } | |
2491 | ||
2492 | /* Quick redisplay hack when erasing characters at the end of the line. */ | |
2493 | void | |
2494 | _rl_erase_at_end_of_line (l) | |
2495 | int l; | |
2496 | { | |
2497 | register int i; | |
2498 | ||
2499 | _rl_backspace (l); | |
2500 | for (i = 0; i < l; i++) | |
2501 | putc (' ', rl_outstream); | |
2502 | _rl_backspace (l); | |
2503 | for (i = 0; i < l; i++) | |
2504 | visible_line[--_rl_last_c_pos] = '\0'; | |
2505 | rl_display_fixed++; | |
2506 | } | |
2507 | ||
2508 | /* Clear to the end of the line. COUNT is the minimum | |
2509 | number of character spaces to clear, */ | |
2510 | void | |
2511 | _rl_clear_to_eol (count) | |
2512 | int count; | |
2513 | { | |
2514 | #ifndef __MSDOS__ | |
2515 | if (_rl_term_clreol) | |
2516 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
2517 | else | |
2518 | #endif | |
2519 | if (count) | |
2520 | space_to_eol (count); | |
2521 | } | |
2522 | ||
2523 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2524 | number of character spaces to clear, */ | |
2525 | static void | |
2526 | space_to_eol (count) | |
2527 | int count; | |
2528 | { | |
2529 | register int i; | |
2530 | ||
2531 | for (i = 0; i < count; i++) | |
2532 | putc (' ', rl_outstream); | |
2533 | ||
2534 | _rl_last_c_pos += count; | |
2535 | } | |
2536 | ||
2537 | void | |
2538 | _rl_clear_screen () | |
2539 | { | |
2540 | #ifndef __DJGPP__ | |
2541 | if (_rl_term_clrpag) | |
2542 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
2543 | else | |
2544 | rl_crlf (); | |
2545 | #else | |
2546 | ScreenClear (); | |
2547 | ScreenSetCursor (0, 0); | |
2548 | #endif /* __DJGPP__ */ | |
2549 | } | |
2550 | ||
2551 | /* Insert COUNT characters from STRING to the output stream at column COL. */ | |
2552 | static void | |
2553 | insert_some_chars (string, count, col) | |
2554 | char *string; | |
2555 | int count, col; | |
2556 | { | |
2557 | open_some_spaces (col); | |
2558 | _rl_output_some_chars (string, count); | |
2559 | } | |
2560 | ||
2561 | /* Insert COL spaces, keeping the cursor at the same position. We follow the | |
2562 | ncurses documentation and use either im/ei with explicit spaces, or IC/ic | |
2563 | by itself. We assume there will either be ei or we don't need to use it. */ | |
2564 | static void | |
2565 | open_some_spaces (col) | |
2566 | int col; | |
2567 | { | |
2568 | #if !defined (__MSDOS__) && (!defined (__MINGW32__) || defined (NCURSES_VERSION)) | |
2569 | char *buffer; | |
2570 | register int i; | |
2571 | ||
2572 | /* If IC is defined, then we do not have to "enter" insert mode. */ | |
2573 | if (_rl_term_IC) | |
2574 | { | |
2575 | buffer = tgoto (_rl_term_IC, 0, col); | |
2576 | tputs (buffer, 1, _rl_output_character_function); | |
2577 | } | |
2578 | else if (_rl_term_im && *_rl_term_im) | |
2579 | { | |
2580 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
2581 | /* just output the desired number of spaces */ | |
2582 | for (i = col; i--; ) | |
2583 | _rl_output_character_function (' '); | |
2584 | /* If there is a string to turn off insert mode, use it now. */ | |
2585 | if (_rl_term_ei && *_rl_term_ei) | |
2586 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
2587 | /* and move back the right number of spaces */ | |
2588 | _rl_backspace (col); | |
2589 | } | |
2590 | else if (_rl_term_ic && *_rl_term_ic) | |
2591 | { | |
2592 | /* If there is a special command for inserting characters, then | |
2593 | use that first to open up the space. */ | |
2594 | for (i = col; i--; ) | |
2595 | tputs (_rl_term_ic, 1, _rl_output_character_function); | |
2596 | } | |
2597 | #endif /* !__MSDOS__ && (!__MINGW32__ || NCURSES_VERSION)*/ | |
2598 | } | |
2599 | ||
2600 | /* Delete COUNT characters from the display line. */ | |
2601 | static void | |
2602 | delete_chars (count) | |
2603 | int count; | |
2604 | { | |
2605 | if (count > _rl_screenwidth) /* XXX */ | |
2606 | return; | |
2607 | ||
2608 | #if !defined (__MSDOS__) && (!defined (__MINGW32__) || defined (NCURSES_VERSION)) | |
2609 | if (_rl_term_DC && *_rl_term_DC) | |
2610 | { | |
2611 | char *buffer; | |
2612 | buffer = tgoto (_rl_term_DC, count, count); | |
2613 | tputs (buffer, count, _rl_output_character_function); | |
2614 | } | |
2615 | else | |
2616 | { | |
2617 | if (_rl_term_dc && *_rl_term_dc) | |
2618 | while (count--) | |
2619 | tputs (_rl_term_dc, 1, _rl_output_character_function); | |
2620 | } | |
2621 | #endif /* !__MSDOS__ && (!__MINGW32__ || NCURSES_VERSION)*/ | |
2622 | } | |
2623 | ||
2624 | void | |
2625 | _rl_update_final () | |
2626 | { | |
2627 | int full_lines; | |
2628 | ||
2629 | full_lines = 0; | |
2630 | /* If the cursor is the only thing on an otherwise-blank last line, | |
2631 | compensate so we don't print an extra CRLF. */ | |
2632 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
2633 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) | |
2634 | { | |
2635 | _rl_vis_botlin--; | |
2636 | full_lines = 1; | |
2637 | } | |
2638 | _rl_move_vert (_rl_vis_botlin); | |
2639 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ | |
2640 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) | |
2641 | { | |
2642 | char *last_line; | |
2643 | ||
2644 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; | |
2645 | cpos_buffer_position = -1; /* don't know where we are in buffer */ | |
2646 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */ | |
2647 | _rl_clear_to_eol (0); | |
2648 | putc (last_line[_rl_screenwidth - 1], rl_outstream); | |
2649 | } | |
2650 | _rl_vis_botlin = 0; | |
2651 | rl_crlf (); | |
2652 | fflush (rl_outstream); | |
2653 | rl_display_fixed++; | |
2654 | } | |
2655 | ||
2656 | /* Move to the start of the current line. */ | |
2657 | static void | |
2658 | cr () | |
2659 | { | |
2660 | if (_rl_term_cr) | |
2661 | { | |
2662 | #if defined (__MSDOS__) | |
2663 | putc ('\r', rl_outstream); | |
2664 | #else | |
2665 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2666 | #endif | |
2667 | _rl_last_c_pos = 0; | |
2668 | } | |
2669 | } | |
2670 | ||
2671 | /* Redraw the last line of a multi-line prompt that may possibly contain | |
2672 | terminal escape sequences. Called with the cursor at column 0 of the | |
2673 | line to draw the prompt on. */ | |
2674 | static void | |
2675 | redraw_prompt (t) | |
2676 | char *t; | |
2677 | { | |
2678 | char *oldp; | |
2679 | ||
2680 | oldp = rl_display_prompt; | |
2681 | rl_save_prompt (); | |
2682 | ||
2683 | rl_display_prompt = t; | |
2684 | local_prompt = expand_prompt (t, PMT_MULTILINE, | |
2685 | &prompt_visible_length, | |
2686 | &prompt_last_invisible, | |
2687 | &prompt_invis_chars_first_line, | |
2688 | &prompt_physical_chars); | |
2689 | local_prompt_prefix = (char *)NULL; | |
2690 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; | |
2691 | ||
2692 | rl_forced_update_display (); | |
2693 | ||
2694 | rl_display_prompt = oldp; | |
2695 | rl_restore_prompt(); | |
2696 | } | |
2697 | ||
2698 | /* Redisplay the current line after a SIGWINCH is received. */ | |
2699 | void | |
2700 | _rl_redisplay_after_sigwinch () | |
2701 | { | |
2702 | char *t; | |
2703 | ||
2704 | /* Clear the last line (assuming that the screen size change will result in | |
2705 | either more or fewer characters on that line only) and put the cursor at | |
2706 | column 0. Make sure the right thing happens if we have wrapped to a new | |
2707 | screen line. */ | |
2708 | if (_rl_term_cr) | |
2709 | { | |
2710 | _rl_move_vert (_rl_vis_botlin); | |
2711 | ||
2712 | #if defined (__MSDOS__) | |
2713 | putc ('\r', rl_outstream); | |
2714 | #else | |
2715 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2716 | #endif | |
2717 | _rl_last_c_pos = 0; | |
2718 | #if defined (__MSDOS__) | |
2719 | space_to_eol (_rl_screenwidth); | |
2720 | putc ('\r', rl_outstream); | |
2721 | #else | |
2722 | if (_rl_term_clreol) | |
2723 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
2724 | else | |
2725 | { | |
2726 | space_to_eol (_rl_screenwidth); | |
2727 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2728 | } | |
2729 | #endif | |
2730 | if (_rl_last_v_pos > 0) | |
2731 | _rl_move_vert (0); | |
2732 | } | |
2733 | else | |
2734 | rl_crlf (); | |
2735 | ||
2736 | /* Redraw only the last line of a multi-line prompt. */ | |
2737 | t = strrchr (rl_display_prompt, '\n'); | |
2738 | if (t) | |
2739 | redraw_prompt (++t); | |
2740 | else | |
2741 | rl_forced_update_display (); | |
2742 | } | |
2743 | ||
2744 | void | |
2745 | _rl_clean_up_for_exit () | |
2746 | { | |
2747 | if (_rl_echoing_p) | |
2748 | { | |
2749 | if (_rl_vis_botlin > 0) /* minor optimization plus bug fix */ | |
2750 | _rl_move_vert (_rl_vis_botlin); | |
2751 | _rl_vis_botlin = 0; | |
2752 | fflush (rl_outstream); | |
2753 | rl_restart_output (1, 0); | |
2754 | } | |
2755 | } | |
2756 | ||
2757 | void | |
2758 | _rl_erase_entire_line () | |
2759 | { | |
2760 | cr (); | |
2761 | _rl_clear_to_eol (0); | |
2762 | cr (); | |
2763 | fflush (rl_outstream); | |
2764 | } | |
2765 | ||
2766 | void | |
2767 | _rl_ttyflush () | |
2768 | { | |
2769 | fflush (rl_outstream); | |
2770 | } | |
2771 | ||
2772 | /* return the `current display line' of the cursor -- the number of lines to | |
2773 | move up to get to the first screen line of the current readline line. */ | |
2774 | int | |
2775 | _rl_current_display_line () | |
2776 | { | |
2777 | int ret, nleft; | |
2778 | ||
2779 | /* Find out whether or not there might be invisible characters in the | |
2780 | editing buffer. */ | |
2781 | if (rl_display_prompt == rl_prompt) | |
2782 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; | |
2783 | else | |
2784 | nleft = _rl_last_c_pos - _rl_screenwidth; | |
2785 | ||
2786 | if (nleft > 0) | |
2787 | ret = 1 + nleft / _rl_screenwidth; | |
2788 | else | |
2789 | ret = 0; | |
2790 | ||
2791 | return ret; | |
2792 | } | |
2793 | ||
2794 | #if defined (HANDLE_MULTIBYTE) | |
2795 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2796 | In the case of multibyte characters with stateful encoding, we have to | |
2797 | scan from the beginning of the string to take the state into account. */ | |
2798 | static int | |
2799 | _rl_col_width (str, start, end, flags) | |
2800 | const char *str; | |
2801 | int start, end, flags; | |
2802 | { | |
2803 | wchar_t wc; | |
2804 | mbstate_t ps; | |
2805 | int tmp, point, width, max; | |
2806 | ||
2807 | if (end <= start) | |
2808 | return 0; | |
2809 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2810 | /* this can happen in some cases where it's inconvenient to check */ | |
2811 | return (end - start); | |
2812 | ||
2813 | memset (&ps, 0, sizeof (mbstate_t)); | |
2814 | ||
2815 | point = 0; | |
2816 | max = end; | |
2817 | ||
2818 | /* Try to short-circuit common cases. The adjustment to remove wrap_offset | |
2819 | is done by the caller. */ | |
2820 | /* 1. prompt string */ | |
2821 | if (flags && start == 0 && end == local_prompt_len && memcmp (str, local_prompt, local_prompt_len) == 0) | |
2822 | return (prompt_physical_chars + wrap_offset); | |
2823 | /* 2. prompt string + line contents */ | |
2824 | else if (flags && start == 0 && local_prompt_len > 0 && end > local_prompt_len && local_prompt && memcmp (str, local_prompt, local_prompt_len) == 0) | |
2825 | { | |
2826 | tmp = prompt_physical_chars + wrap_offset; | |
2827 | /* XXX - try to call ourselves recursively with non-prompt portion */ | |
2828 | tmp += _rl_col_width (str, local_prompt_len, end, flags); | |
2829 | return (tmp); | |
2830 | } | |
2831 | ||
2832 | while (point < start) | |
2833 | { | |
2834 | tmp = mbrlen (str + point, max, &ps); | |
2835 | if (MB_INVALIDCH ((size_t)tmp)) | |
2836 | { | |
2837 | /* In this case, the bytes are invalid or too short to compose a | |
2838 | multibyte character, so we assume that the first byte represents | |
2839 | a single character. */ | |
2840 | point++; | |
2841 | max--; | |
2842 | ||
2843 | /* Clear the state of the byte sequence, because in this case the | |
2844 | effect of mbstate is undefined. */ | |
2845 | memset (&ps, 0, sizeof (mbstate_t)); | |
2846 | } | |
2847 | else if (MB_NULLWCH (tmp)) | |
2848 | break; /* Found '\0' */ | |
2849 | else | |
2850 | { | |
2851 | point += tmp; | |
2852 | max -= tmp; | |
2853 | } | |
2854 | } | |
2855 | ||
2856 | /* If START is not a byte that starts a character, then POINT will be | |
2857 | greater than START. In this case, assume that (POINT - START) gives | |
2858 | a byte count that is the number of columns of difference. */ | |
2859 | width = point - start; | |
2860 | ||
2861 | while (point < end) | |
2862 | { | |
2863 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
2864 | if (MB_INVALIDCH ((size_t)tmp)) | |
2865 | { | |
2866 | /* In this case, the bytes are invalid or too short to compose a | |
2867 | multibyte character, so we assume that the first byte represents | |
2868 | a single character. */ | |
2869 | point++; | |
2870 | max--; | |
2871 | ||
2872 | /* and assume that the byte occupies a single column. */ | |
2873 | width++; | |
2874 | ||
2875 | /* Clear the state of the byte sequence, because in this case the | |
2876 | effect of mbstate is undefined. */ | |
2877 | memset (&ps, 0, sizeof (mbstate_t)); | |
2878 | } | |
2879 | else if (MB_NULLWCH (tmp)) | |
2880 | break; /* Found '\0' */ | |
2881 | else | |
2882 | { | |
2883 | point += tmp; | |
2884 | max -= tmp; | |
2885 | tmp = WCWIDTH(wc); | |
2886 | width += (tmp >= 0) ? tmp : 1; | |
2887 | } | |
2888 | } | |
2889 | ||
2890 | width += point - end; | |
2891 | ||
2892 | return width; | |
2893 | } | |
2894 | #endif /* HANDLE_MULTIBYTE */ |