Commit | Line | Data |
---|---|---|
d60d9f65 SS |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
5836a818 | 3 | /* Copyright (C) 1987-2009 Free Software Foundation, Inc. |
d60d9f65 | 4 | |
cc88a640 JK |
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. | |
d60d9f65 | 7 | |
cc88a640 JK |
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 | |
d60d9f65 SS |
11 | (at your option) any later version. |
12 | ||
cc88a640 JK |
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 | |
d60d9f65 SS |
16 | GNU General Public License for more details. |
17 | ||
cc88a640 JK |
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 | ||
d60d9f65 SS |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <sys/types.h> | |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
34 | #include "posixstat.h" | |
35 | ||
36 | #if defined (HAVE_STDLIB_H) | |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
42 | #include <stdio.h> | |
43 | ||
30083a32 | 44 | #ifdef __MSDOS__ |
5836a818 | 45 | # include <pc.h> |
30083a32 EZ |
46 | #endif |
47 | ||
d60d9f65 SS |
48 | /* System-specific feature definitions and include files. */ |
49 | #include "rldefs.h" | |
9255ee31 | 50 | #include "rlmbutil.h" |
d60d9f65 SS |
51 | |
52 | /* Termcap library stuff. */ | |
53 | #include "tcap.h" | |
54 | ||
55 | /* Some standard library routines. */ | |
56 | #include "readline.h" | |
57 | #include "history.h" | |
58 | ||
1b17e766 EZ |
59 | #include "rlprivate.h" |
60 | #include "xmalloc.h" | |
61 | ||
d60d9f65 SS |
62 | #if !defined (strchr) && !defined (__STDC__) |
63 | extern char *strchr (), *strrchr (); | |
64 | #endif /* !strchr && !__STDC__ */ | |
65 | ||
9255ee31 EZ |
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 cr PARAMS((void)); | |
71 | ||
cc88a640 JK |
72 | /* State of visible and invisible lines. */ |
73 | struct line_state | |
74 | { | |
75 | char *line; | |
76 | int *lbreaks; | |
77 | int lbsize; | |
9255ee31 | 78 | #if defined (HANDLE_MULTIBYTE) |
cc88a640 JK |
79 | int *wrapped_line; |
80 | int wbsize; | |
9255ee31 | 81 | #endif |
cc88a640 JK |
82 | }; |
83 | ||
84 | /* The line display buffers. One is the line currently displayed on | |
85 | the screen. The other is the line about to be displayed. */ | |
86 | static struct line_state line_state_array[2]; | |
87 | static struct line_state *line_state_visible = &line_state_array[0]; | |
88 | static struct line_state *line_state_invisible = &line_state_array[1]; | |
89 | static int line_structures_initialized = 0; | |
d60d9f65 | 90 | |
cc88a640 JK |
91 | /* Backwards-compatible names. */ |
92 | #define inv_lbreaks (line_state_invisible->lbreaks) | |
93 | #define inv_lbsize (line_state_invisible->lbsize) | |
94 | #define vis_lbreaks (line_state_visible->lbreaks) | |
95 | #define vis_lbsize (line_state_visible->lbsize) | |
96 | ||
97 | #define visible_line (line_state_visible->line) | |
98 | #define invisible_line (line_state_invisible->line) | |
99 | ||
100 | #if defined (HANDLE_MULTIBYTE) | |
101 | static int _rl_col_width PARAMS((const char *, int, int, int)); | |
102 | #else | |
103 | # define _rl_col_width(l, s, e, f) (((e) <= (s)) ? 0 : (e) - (s)) | |
104 | #endif | |
d60d9f65 SS |
105 | |
106 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
cc88a640 JK |
107 | by backing up or outputting a carriage return and moving forward. CUR |
108 | and NEW are either both buffer positions or absolute screen positions. */ | |
d60d9f65 SS |
109 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) |
110 | ||
cc88a640 JK |
111 | /* _rl_last_c_pos is an absolute cursor position in multibyte locales and a |
112 | buffer index in others. This macro is used when deciding whether the | |
113 | current cursor position is in the middle of a prompt string containing | |
114 | invisible characters. XXX - might need to take `modmark' into account. */ | |
115 | #define PROMPT_ENDING_INDEX \ | |
116 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1) | |
117 | ||
118 | ||
d60d9f65 SS |
119 | /* **************************************************************** */ |
120 | /* */ | |
121 | /* Display stuff */ | |
122 | /* */ | |
123 | /* **************************************************************** */ | |
124 | ||
125 | /* This is the stuff that is hard for me. I never seem to write good | |
126 | display routines in C. Let's see how I do this time. */ | |
127 | ||
128 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
129 | the problems of input lines longer than the screen width. | |
130 | ||
131 | update_line and the code that calls it makes a multiple line, | |
132 | automatically wrapping line update. Careful attention needs | |
133 | to be paid to the vertical position variables. */ | |
134 | ||
135 | /* Keep two buffers; one which reflects the current contents of the | |
136 | screen, and the other to draw what we think the new contents should | |
137 | be. Then compare the buffers, and make whatever changes to the | |
138 | screen itself that we should. Finally, make the buffer that we | |
139 | just drew into be the one which reflects the current contents of the | |
140 | screen, and place the cursor where it belongs. | |
141 | ||
142 | Commands that want to can fix the display themselves, and then let | |
143 | this function know that the display has been fixed by setting the | |
144 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
145 | ||
146 | /* Application-specific redisplay function. */ | |
9255ee31 | 147 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
d60d9f65 SS |
148 | |
149 | /* Global variables declared here. */ | |
150 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
151 | int rl_display_fixed = 0; | |
152 | ||
153 | int _rl_suppress_redisplay = 0; | |
5bdf8622 | 154 | int _rl_want_redisplay = 0; |
d60d9f65 SS |
155 | |
156 | /* The stuff that gets printed out before the actual text of the line. | |
157 | This is usually pointing to rl_prompt. */ | |
158 | char *rl_display_prompt = (char *)NULL; | |
159 | ||
160 | /* Pseudo-global variables declared here. */ | |
5bdf8622 | 161 | |
d60d9f65 | 162 | /* The visible cursor position. If you print some text, adjust this. */ |
5bdf8622 DJ |
163 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
164 | supporting multibyte characters, and an absolute cursor position when | |
165 | in such a locale. This is an artifact of the donated multibyte support. | |
166 | Care must be taken when modifying its value. */ | |
d60d9f65 SS |
167 | int _rl_last_c_pos = 0; |
168 | int _rl_last_v_pos = 0; | |
169 | ||
5bdf8622 | 170 | static int cpos_adjusted; |
cc88a640 JK |
171 | static int cpos_buffer_position; |
172 | static int prompt_multibyte_chars; | |
5bdf8622 | 173 | |
d60d9f65 SS |
174 | /* Number of lines currently on screen minus 1. */ |
175 | int _rl_vis_botlin = 0; | |
176 | ||
177 | /* Variables used only in this file. */ | |
178 | /* The last left edge of text that was displayed. This is used when | |
179 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
180 | static int last_lmargin; | |
181 | ||
d60d9f65 | 182 | /* A buffer for `modeline' messages. */ |
5836a818 | 183 | static char msg_buf[128]; |
d60d9f65 SS |
184 | |
185 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
186 | static int forced_display; | |
187 | ||
188 | /* Default and initial buffer size. Can grow. */ | |
189 | static int line_size = 1024; | |
190 | ||
9255ee31 EZ |
191 | /* Variables to keep track of the expanded prompt string, which may |
192 | include invisible characters. */ | |
193 | ||
d60d9f65 | 194 | static char *local_prompt, *local_prompt_prefix; |
cc88a640 | 195 | static int local_prompt_len; |
9255ee31 | 196 | static int prompt_visible_length, prompt_prefix_length; |
d60d9f65 SS |
197 | |
198 | /* The number of invisible characters in the line currently being | |
199 | displayed on the screen. */ | |
200 | static int visible_wrap_offset; | |
201 | ||
9255ee31 EZ |
202 | /* The number of invisible characters in the prompt string. Static so it |
203 | can be shared between rl_redisplay and update_line */ | |
d60d9f65 SS |
204 | static int wrap_offset; |
205 | ||
9255ee31 EZ |
206 | /* The index of the last invisible character in the prompt string. */ |
207 | static int prompt_last_invisible; | |
d60d9f65 SS |
208 | |
209 | /* The length (buffer offset) of the first line of the last (possibly | |
210 | multi-line) buffer displayed on the screen. */ | |
211 | static int visible_first_line_len; | |
212 | ||
9255ee31 EZ |
213 | /* Number of invisible characters on the first physical line of the prompt. |
214 | Only valid when the number of physical characters in the prompt exceeds | |
215 | (or is equal to) _rl_screenwidth. */ | |
216 | static int prompt_invis_chars_first_line; | |
217 | ||
218 | static int prompt_last_screen_line; | |
219 | ||
5bdf8622 DJ |
220 | static int prompt_physical_chars; |
221 | ||
cc88a640 JK |
222 | /* set to a non-zero value by rl_redisplay if we are marking modified history |
223 | lines and the current line is so marked. */ | |
224 | static int modmark; | |
225 | ||
5bdf8622 DJ |
226 | /* Variables to save and restore prompt and display information. */ |
227 | ||
228 | /* These are getting numerous enough that it's time to create a struct. */ | |
229 | ||
230 | static char *saved_local_prompt; | |
231 | static char *saved_local_prefix; | |
232 | static int saved_last_invisible; | |
233 | static int saved_visible_length; | |
234 | static int saved_prefix_length; | |
cc88a640 | 235 | static int saved_local_length; |
5bdf8622 DJ |
236 | static int saved_invis_chars_first_line; |
237 | static int saved_physical_chars; | |
238 | ||
d60d9f65 SS |
239 | /* Expand the prompt string S and return the number of visible |
240 | characters in *LP, if LP is not null. This is currently more-or-less | |
241 | a placeholder for expansion. LIP, if non-null is a place to store the | |
9255ee31 EZ |
242 | index of the last invisible character in the returned string. NIFLP, |
243 | if non-zero, is a place to store the number of invisible characters in | |
5bdf8622 DJ |
244 | the first prompt line. The previous are used as byte counts -- indexes |
245 | into a character buffer. */ | |
d60d9f65 SS |
246 | |
247 | /* Current implementation: | |
248 | \001 (^A) start non-visible characters | |
249 | \002 (^B) end non-visible characters | |
250 | all characters except \001 and \002 (following a \001) are copied to | |
251 | the returned string; all characters except those between \001 and | |
252 | \002 are assumed to be `visible'. */ | |
253 | ||
254 | static char * | |
5836a818 | 255 | expand_prompt (pmt, lp, lip, niflp, vlp) |
d60d9f65 | 256 | char *pmt; |
5bdf8622 | 257 | int *lp, *lip, *niflp, *vlp; |
d60d9f65 | 258 | { |
5836a818 | 259 | char *r, *ret, *p, *igstart; |
5bdf8622 | 260 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
d60d9f65 SS |
261 | |
262 | /* Short-circuit if we can. */ | |
5836a818 | 263 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
d60d9f65 | 264 | { |
5836a818 | 265 | r = savestring (pmt); |
d60d9f65 SS |
266 | if (lp) |
267 | *lp = strlen (r); | |
5bdf8622 DJ |
268 | if (lip) |
269 | *lip = 0; | |
270 | if (niflp) | |
271 | *niflp = 0; | |
272 | if (vlp) | |
273 | *vlp = lp ? *lp : strlen (r); | |
d60d9f65 SS |
274 | return r; |
275 | } | |
276 | ||
5836a818 | 277 | l = strlen (pmt); |
9255ee31 EZ |
278 | r = ret = (char *)xmalloc (l + 1); |
279 | ||
280 | invfl = 0; /* invisible chars in first line of prompt */ | |
5bdf8622 | 281 | invflset = 0; /* we only want to set invfl once */ |
4a11f206 | 282 | |
5836a818 PP |
283 | igstart = 0; |
284 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) | |
d60d9f65 SS |
285 | { |
286 | /* This code strips the invisible character string markers | |
287 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
cc88a640 | 288 | if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */ |
d60d9f65 | 289 | { |
cc88a640 JK |
290 | ignoring = 1; |
291 | igstart = p; | |
d60d9f65 SS |
292 | continue; |
293 | } | |
294 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
295 | { | |
296 | ignoring = 0; | |
cc88a640 | 297 | if (p != (igstart + 1)) |
5bdf8622 | 298 | last = r - ret - 1; |
d60d9f65 SS |
299 | continue; |
300 | } | |
301 | else | |
302 | { | |
5bdf8622 DJ |
303 | #if defined (HANDLE_MULTIBYTE) |
304 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
305 | { | |
5836a818 PP |
306 | pind = p - pmt; |
307 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
5bdf8622 DJ |
308 | l = ind - pind; |
309 | while (l--) | |
310 | *r++ = *p++; | |
311 | if (!ignoring) | |
312 | { | |
cc88a640 JK |
313 | /* rl ends up being assigned to prompt_visible_length, |
314 | which is the number of characters in the buffer that | |
315 | contribute to characters on the screen, which might | |
316 | not be the same as the number of physical characters | |
317 | on the screen in the presence of multibyte characters */ | |
5bdf8622 | 318 | rl += ind - pind; |
5836a818 | 319 | physchars += _rl_col_width (pmt, pind, ind, 0); |
5bdf8622 DJ |
320 | } |
321 | else | |
322 | ninvis += ind - pind; | |
323 | p--; /* compensate for later increment */ | |
324 | } | |
9255ee31 | 325 | else |
5bdf8622 DJ |
326 | #endif |
327 | { | |
328 | *r++ = *p; | |
329 | if (!ignoring) | |
330 | { | |
331 | rl++; /* visible length byte counter */ | |
332 | physchars++; | |
333 | } | |
334 | else | |
335 | ninvis++; /* invisible chars byte counter */ | |
336 | } | |
337 | ||
338 | if (invflset == 0 && rl >= _rl_screenwidth) | |
339 | { | |
340 | invfl = ninvis; | |
341 | invflset = 1; | |
342 | } | |
d60d9f65 SS |
343 | } |
344 | } | |
345 | ||
9255ee31 EZ |
346 | if (rl < _rl_screenwidth) |
347 | invfl = ninvis; | |
348 | ||
d60d9f65 SS |
349 | *r = '\0'; |
350 | if (lp) | |
351 | *lp = rl; | |
352 | if (lip) | |
353 | *lip = last; | |
9255ee31 EZ |
354 | if (niflp) |
355 | *niflp = invfl; | |
5bdf8622 DJ |
356 | if (vlp) |
357 | *vlp = physchars; | |
d60d9f65 SS |
358 | return ret; |
359 | } | |
360 | ||
1b17e766 EZ |
361 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
362 | PMT and return the rest of PMT. */ | |
363 | char * | |
364 | _rl_strip_prompt (pmt) | |
365 | char *pmt; | |
366 | { | |
367 | char *ret; | |
368 | ||
5836a818 | 369 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
1b17e766 EZ |
370 | return ret; |
371 | } | |
372 | ||
d60d9f65 SS |
373 | /* |
374 | * Expand the prompt string into the various display components, if | |
375 | * necessary. | |
376 | * | |
377 | * local_prompt = expanded last line of string in rl_display_prompt | |
378 | * (portion after the final newline) | |
379 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
380 | * expanded via expand_prompt | |
9255ee31 EZ |
381 | * prompt_visible_length = number of visible characters in local_prompt |
382 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
d60d9f65 SS |
383 | * |
384 | * This function is called once per call to readline(). It may also be | |
385 | * called arbitrarily to expand the primary prompt. | |
386 | * | |
387 | * The return value is the number of visible characters on the last line | |
388 | * of the (possibly multi-line) prompt. | |
389 | */ | |
390 | int | |
391 | rl_expand_prompt (prompt) | |
392 | char *prompt; | |
393 | { | |
394 | char *p, *t; | |
395 | int c; | |
396 | ||
397 | /* Clear out any saved values. */ | |
9255ee31 EZ |
398 | FREE (local_prompt); |
399 | FREE (local_prompt_prefix); | |
400 | ||
d60d9f65 | 401 | local_prompt = local_prompt_prefix = (char *)0; |
cc88a640 | 402 | local_prompt_len = 0; |
5bdf8622 DJ |
403 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
404 | prompt_visible_length = prompt_physical_chars = 0; | |
d60d9f65 SS |
405 | |
406 | if (prompt == 0 || *prompt == 0) | |
407 | return (0); | |
408 | ||
409 | p = strrchr (prompt, '\n'); | |
5836a818 | 410 | if (!p) |
d60d9f65 | 411 | { |
9255ee31 | 412 | /* The prompt is only one logical line, though it might wrap. */ |
5836a818 PP |
413 | local_prompt = expand_prompt (prompt, &prompt_visible_length, |
414 | &prompt_last_invisible, | |
415 | &prompt_invis_chars_first_line, | |
416 | &prompt_physical_chars); | |
d60d9f65 | 417 | local_prompt_prefix = (char *)0; |
cc88a640 | 418 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
9255ee31 | 419 | return (prompt_visible_length); |
d60d9f65 SS |
420 | } |
421 | else | |
422 | { | |
423 | /* The prompt spans multiple lines. */ | |
424 | t = ++p; | |
5836a818 | 425 | local_prompt = expand_prompt (p, &prompt_visible_length, |
9255ee31 | 426 | &prompt_last_invisible, |
cc88a640 | 427 | &prompt_invis_chars_first_line, |
5bdf8622 | 428 | &prompt_physical_chars); |
d60d9f65 SS |
429 | c = *t; *t = '\0'; |
430 | /* The portion of the prompt string up to and including the | |
431 | final newline is now null-terminated. */ | |
5836a818 | 432 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
9255ee31 | 433 | (int *)NULL, |
cc88a640 | 434 | (int *)NULL, |
5bdf8622 | 435 | (int *)NULL); |
d60d9f65 | 436 | *t = c; |
cc88a640 | 437 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
9255ee31 | 438 | return (prompt_prefix_length); |
d60d9f65 SS |
439 | } |
440 | } | |
441 | ||
1b17e766 EZ |
442 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
443 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
444 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
445 | increased. If the lines have already been allocated, this ensures that | |
446 | they can hold at least MINSIZE characters. */ | |
447 | static void | |
448 | init_line_structures (minsize) | |
449 | int minsize; | |
450 | { | |
451 | register int n; | |
452 | ||
830b6706 TV |
453 | if (minsize <= _rl_screenwidth) /* XXX - for gdb */ |
454 | minsize = _rl_screenwidth + 1; | |
455 | ||
1b17e766 EZ |
456 | if (invisible_line == 0) /* initialize it */ |
457 | { | |
458 | if (line_size < minsize) | |
459 | line_size = minsize; | |
9255ee31 EZ |
460 | visible_line = (char *)xmalloc (line_size); |
461 | invisible_line = (char *)xmalloc (line_size); | |
1b17e766 EZ |
462 | } |
463 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
464 | { | |
465 | line_size *= 2; | |
466 | if (line_size < minsize) | |
467 | line_size = minsize; | |
9255ee31 EZ |
468 | visible_line = (char *)xrealloc (visible_line, line_size); |
469 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
1b17e766 EZ |
470 | } |
471 | ||
472 | for (n = minsize; n < line_size; n++) | |
473 | { | |
474 | visible_line[n] = 0; | |
475 | invisible_line[n] = 1; | |
476 | } | |
477 | ||
478 | if (vis_lbreaks == 0) | |
479 | { | |
480 | /* should be enough. */ | |
481 | inv_lbsize = vis_lbsize = 256; | |
cc88a640 | 482 | |
9255ee31 | 483 | #if defined (HANDLE_MULTIBYTE) |
cc88a640 JK |
484 | line_state_visible->wbsize = vis_lbsize; |
485 | line_state_visible->wrapped_line = (int *)xmalloc (line_state_visible->wbsize * sizeof (int)); | |
486 | ||
487 | line_state_invisible->wbsize = inv_lbsize; | |
488 | line_state_invisible->wrapped_line = (int *)xmalloc (line_state_invisible->wbsize * sizeof (int)); | |
9255ee31 | 489 | #endif |
cc88a640 JK |
490 | |
491 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
492 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
1b17e766 EZ |
493 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
494 | } | |
cc88a640 JK |
495 | |
496 | line_structures_initialized = 1; | |
1b17e766 EZ |
497 | } |
498 | ||
d60d9f65 SS |
499 | /* Basic redisplay algorithm. */ |
500 | void | |
501 | rl_redisplay () | |
502 | { | |
503 | register int in, out, c, linenum, cursor_linenum; | |
504 | register char *line; | |
cc88a640 JK |
505 | int inv_botlin, lb_botlin, lb_linenum, o_cpos; |
506 | int newlines, lpos, temp, n0, num, prompt_lines_estimate; | |
d60d9f65 | 507 | char *prompt_this_line; |
9255ee31 EZ |
508 | #if defined (HANDLE_MULTIBYTE) |
509 | wchar_t wc; | |
510 | size_t wc_bytes; | |
511 | int wc_width; | |
512 | mbstate_t ps; | |
513 | int _rl_wrapped_multicolumn = 0; | |
514 | #endif | |
d60d9f65 | 515 | |
cc88a640 | 516 | if (_rl_echoing_p == 0) |
d60d9f65 SS |
517 | return; |
518 | ||
cc88a640 JK |
519 | /* Block keyboard interrupts because this function manipulates global |
520 | data structures. */ | |
521 | _rl_block_sigint (); | |
522 | RL_SETSTATE (RL_STATE_REDISPLAYING); | |
87adec2e | 523 | |
d60d9f65 SS |
524 | if (!rl_display_prompt) |
525 | rl_display_prompt = ""; | |
526 | ||
cc88a640 | 527 | if (line_structures_initialized == 0) |
d60d9f65 | 528 | { |
1b17e766 | 529 | init_line_structures (0); |
d60d9f65 SS |
530 | rl_on_new_line (); |
531 | } | |
830b6706 TV |
532 | else if (line_size <= _rl_screenwidth) |
533 | init_line_structures (_rl_screenwidth + 1); | |
d60d9f65 SS |
534 | |
535 | /* Draw the line into the buffer. */ | |
cc88a640 JK |
536 | cpos_buffer_position = -1; |
537 | ||
538 | prompt_multibyte_chars = prompt_visible_length - prompt_physical_chars; | |
d60d9f65 SS |
539 | |
540 | line = invisible_line; | |
541 | out = inv_botlin = 0; | |
542 | ||
543 | /* Mark the line as modified or not. We only do this for history | |
544 | lines. */ | |
5bdf8622 | 545 | modmark = 0; |
d60d9f65 SS |
546 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
547 | { | |
548 | line[out++] = '*'; | |
549 | line[out] = '\0'; | |
5bdf8622 | 550 | modmark = 1; |
d60d9f65 SS |
551 | } |
552 | ||
553 | /* If someone thought that the redisplay was handled, but the currently | |
554 | visible line has a different modification state than the one about | |
555 | to become visible, then correct the caller's misconception. */ | |
556 | if (visible_line[0] != invisible_line[0]) | |
557 | rl_display_fixed = 0; | |
558 | ||
559 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
560 | one passed to readline()), use the values we have already expanded. | |
561 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
562 | number of non-visible characters in the prompt string. */ | |
563 | if (rl_display_prompt == rl_prompt || local_prompt) | |
564 | { | |
d60d9f65 SS |
565 | if (local_prompt_prefix && forced_display) |
566 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
567 | ||
cc88a640 | 568 | if (local_prompt_len > 0) |
d60d9f65 | 569 | { |
cc88a640 | 570 | temp = local_prompt_len + out + 2; |
c862e87b JM |
571 | if (temp >= line_size) |
572 | { | |
573 | line_size = (temp + 1024) - (temp % 1024); | |
9255ee31 EZ |
574 | visible_line = (char *)xrealloc (visible_line, line_size); |
575 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
c862e87b | 576 | } |
cc88a640 JK |
577 | strncpy (line + out, local_prompt, local_prompt_len); |
578 | out += local_prompt_len; | |
d60d9f65 SS |
579 | } |
580 | line[out] = '\0'; | |
cc88a640 | 581 | wrap_offset = local_prompt_len - prompt_visible_length; |
d60d9f65 SS |
582 | } |
583 | else | |
584 | { | |
585 | int pmtlen; | |
586 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
587 | if (!prompt_this_line) | |
588 | prompt_this_line = rl_display_prompt; | |
589 | else | |
590 | { | |
591 | prompt_this_line++; | |
1b17e766 | 592 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
d60d9f65 SS |
593 | if (forced_display) |
594 | { | |
1b17e766 | 595 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
d60d9f65 SS |
596 | /* Make sure we are at column zero even after a newline, |
597 | regardless of the state of terminal output processing. */ | |
1b17e766 | 598 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
d60d9f65 SS |
599 | cr (); |
600 | } | |
601 | } | |
602 | ||
5bdf8622 | 603 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
c862e87b JM |
604 | temp = pmtlen + out + 2; |
605 | if (temp >= line_size) | |
606 | { | |
607 | line_size = (temp + 1024) - (temp % 1024); | |
9255ee31 EZ |
608 | visible_line = (char *)xrealloc (visible_line, line_size); |
609 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
c862e87b | 610 | } |
d60d9f65 SS |
611 | strncpy (line + out, prompt_this_line, pmtlen); |
612 | out += pmtlen; | |
613 | line[out] = '\0'; | |
9255ee31 | 614 | wrap_offset = prompt_invis_chars_first_line = 0; |
d60d9f65 SS |
615 | } |
616 | ||
1b17e766 EZ |
617 | #define CHECK_INV_LBREAKS() \ |
618 | do { \ | |
619 | if (newlines >= (inv_lbsize - 2)) \ | |
620 | { \ | |
621 | inv_lbsize *= 2; \ | |
622 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
623 | } \ | |
624 | } while (0) | |
9255ee31 EZ |
625 | |
626 | #if defined (HANDLE_MULTIBYTE) | |
d60d9f65 SS |
627 | #define CHECK_LPOS() \ |
628 | do { \ | |
c862e87b | 629 | lpos++; \ |
9255ee31 | 630 | if (lpos >= _rl_screenwidth) \ |
c862e87b | 631 | { \ |
1b17e766 EZ |
632 | if (newlines >= (inv_lbsize - 2)) \ |
633 | { \ | |
634 | inv_lbsize *= 2; \ | |
635 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
636 | } \ | |
c862e87b | 637 | inv_lbreaks[++newlines] = out; \ |
cc88a640 JK |
638 | if (newlines >= (line_state_invisible->wbsize - 1)) \ |
639 | { \ | |
640 | line_state_invisible->wbsize *= 2; \ | |
641 | line_state_invisible->wrapped_line = (int *)xrealloc (line_state_invisible->wrapped_line, line_state_invisible->wbsize * sizeof(int)); \ | |
642 | } \ | |
643 | line_state_invisible->wrapped_line[newlines] = _rl_wrapped_multicolumn; \ | |
c862e87b JM |
644 | lpos = 0; \ |
645 | } \ | |
d60d9f65 | 646 | } while (0) |
9255ee31 EZ |
647 | #else |
648 | #define CHECK_LPOS() \ | |
649 | do { \ | |
650 | lpos++; \ | |
651 | if (lpos >= _rl_screenwidth) \ | |
652 | { \ | |
653 | if (newlines >= (inv_lbsize - 2)) \ | |
654 | { \ | |
655 | inv_lbsize *= 2; \ | |
656 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
657 | } \ | |
658 | inv_lbreaks[++newlines] = out; \ | |
659 | lpos = 0; \ | |
660 | } \ | |
661 | } while (0) | |
662 | #endif | |
d60d9f65 SS |
663 | |
664 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
665 | inv_lbreaks[newlines = 0] = 0; | |
5bdf8622 | 666 | lpos = prompt_physical_chars + modmark; |
5bdf8622 | 667 | |
9255ee31 | 668 | #if defined (HANDLE_MULTIBYTE) |
cc88a640 | 669 | memset (line_state_invisible->wrapped_line, 0, line_state_invisible->wbsize * sizeof (int)); |
5bdf8622 | 670 | num = 0; |
9255ee31 EZ |
671 | #endif |
672 | ||
673 | /* prompt_invis_chars_first_line is the number of invisible characters in | |
674 | the first physical line of the prompt. | |
675 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
cc88a640 JK |
676 | chars on the second (or, more generally, last) line. */ |
677 | ||
678 | /* This is zero-based, used to set the newlines */ | |
679 | prompt_lines_estimate = lpos / _rl_screenwidth; | |
d60d9f65 | 680 | |
9255ee31 | 681 | /* what if lpos is already >= _rl_screenwidth before we start drawing the |
d60d9f65 | 682 | contents of the command line? */ |
9255ee31 | 683 | while (lpos >= _rl_screenwidth) |
d60d9f65 | 684 | { |
5836a818 | 685 | int z; |
9255ee31 EZ |
686 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
687 | invisible characters that is longer than the screen width. The | |
688 | prompt_invis_chars_first_line variable could be made into an array | |
689 | saying how many invisible characters there are per line, but that's | |
690 | probably too much work for the benefit gained. How many people have | |
5bdf8622 DJ |
691 | prompts that exceed two physical lines? |
692 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
693 | #if defined (HANDLE_MULTIBYTE) | |
5836a818 | 694 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) |
5bdf8622 | 695 | { |
cc88a640 JK |
696 | n0 = num; |
697 | temp = local_prompt_len; | |
698 | while (num < temp) | |
5bdf8622 | 699 | { |
cc88a640 JK |
700 | z = _rl_col_width (local_prompt, n0, num, 1); |
701 | if (z > _rl_screenwidth) | |
702 | { | |
703 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
704 | break; | |
705 | } | |
706 | else if (z == _rl_screenwidth) | |
5836a818 | 707 | break; |
cc88a640 | 708 | num++; |
5bdf8622 | 709 | } |
cc88a640 | 710 | temp = num; |
5bdf8622 | 711 | } |
cc88a640 | 712 | else |
5bdf8622 | 713 | #endif /* !HANDLE_MULTIBYTE */ |
cc88a640 JK |
714 | temp = ((newlines + 1) * _rl_screenwidth); |
715 | ||
716 | /* Now account for invisible characters in the current line. */ | |
717 | /* XXX - this assumes that the invisible characters may be split, but only | |
718 | between the first and the last lines. */ | |
5836a818 PP |
719 | temp += ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line |
720 | : ((newlines == prompt_lines_estimate) ? wrap_offset : prompt_invis_chars_first_line)) | |
721 | : ((newlines == 0) ? wrap_offset : 0)); | |
722 | ||
d60d9f65 | 723 | inv_lbreaks[++newlines] = temp; |
5bdf8622 | 724 | #if defined (HANDLE_MULTIBYTE) |
5836a818 | 725 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) |
cc88a640 JK |
726 | lpos -= _rl_col_width (local_prompt, n0, num, 1); |
727 | else | |
5bdf8622 | 728 | #endif |
cc88a640 | 729 | lpos -= _rl_screenwidth; |
d60d9f65 SS |
730 | } |
731 | ||
9255ee31 EZ |
732 | prompt_last_screen_line = newlines; |
733 | ||
734 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
cc88a640 | 735 | track of where the cursor is (cpos_buffer_position), the number of the line containing |
9255ee31 EZ |
736 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
737 | It maintains an array of line breaks for display (inv_lbreaks). | |
738 | This handles expanding tabs for display and displaying meta characters. */ | |
d60d9f65 | 739 | lb_linenum = 0; |
9255ee31 EZ |
740 | #if defined (HANDLE_MULTIBYTE) |
741 | in = 0; | |
5836a818 | 742 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
9255ee31 EZ |
743 | { |
744 | memset (&ps, 0, sizeof (mbstate_t)); | |
cc88a640 | 745 | /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */ |
9255ee31 EZ |
746 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); |
747 | } | |
748 | else | |
749 | wc_bytes = 1; | |
750 | while (in < rl_end) | |
751 | #else | |
d60d9f65 | 752 | for (in = 0; in < rl_end; in++) |
9255ee31 | 753 | #endif |
d60d9f65 SS |
754 | { |
755 | c = (unsigned char)rl_line_buffer[in]; | |
756 | ||
9255ee31 | 757 | #if defined (HANDLE_MULTIBYTE) |
5836a818 | 758 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
9255ee31 | 759 | { |
5bdf8622 | 760 | if (MB_INVALIDCH (wc_bytes)) |
9255ee31 EZ |
761 | { |
762 | /* Byte sequence is invalid or shortened. Assume that the | |
763 | first byte represents a character. */ | |
764 | wc_bytes = 1; | |
765 | /* Assume that a character occupies a single column. */ | |
766 | wc_width = 1; | |
767 | memset (&ps, 0, sizeof (mbstate_t)); | |
768 | } | |
5bdf8622 | 769 | else if (MB_NULLWCH (wc_bytes)) |
9255ee31 EZ |
770 | break; /* Found '\0' */ |
771 | else | |
772 | { | |
5836a818 | 773 | temp = wcwidth (wc); |
5bdf8622 | 774 | wc_width = (temp >= 0) ? temp : 1; |
9255ee31 EZ |
775 | } |
776 | } | |
777 | #endif | |
778 | ||
d60d9f65 SS |
779 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
780 | { | |
781 | line_size *= 2; | |
9255ee31 EZ |
782 | visible_line = (char *)xrealloc (visible_line, line_size); |
783 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
d60d9f65 SS |
784 | line = invisible_line; |
785 | } | |
786 | ||
787 | if (in == rl_point) | |
788 | { | |
cc88a640 | 789 | cpos_buffer_position = out; |
d60d9f65 SS |
790 | lb_linenum = newlines; |
791 | } | |
792 | ||
9255ee31 EZ |
793 | #if defined (HANDLE_MULTIBYTE) |
794 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
795 | #else | |
d60d9f65 | 796 | if (META_CHAR (c)) |
9255ee31 | 797 | #endif |
d60d9f65 SS |
798 | { |
799 | if (_rl_output_meta_chars == 0) | |
800 | { | |
801 | sprintf (line + out, "\\%o", c); | |
802 | ||
9255ee31 | 803 | if (lpos + 4 >= _rl_screenwidth) |
d60d9f65 | 804 | { |
9255ee31 | 805 | temp = _rl_screenwidth - lpos; |
1b17e766 | 806 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
807 | inv_lbreaks[++newlines] = out + temp; |
808 | lpos = 4 - temp; | |
809 | } | |
810 | else | |
811 | lpos += 4; | |
812 | ||
813 | out += 4; | |
814 | } | |
815 | else | |
816 | { | |
817 | line[out++] = c; | |
818 | CHECK_LPOS(); | |
819 | } | |
820 | } | |
821 | #if defined (DISPLAY_TABS) | |
822 | else if (c == '\t') | |
823 | { | |
9255ee31 | 824 | register int newout; |
c862e87b JM |
825 | |
826 | #if 0 | |
d60d9f65 | 827 | newout = (out | (int)7) + 1; |
c862e87b JM |
828 | #else |
829 | newout = out + 8 - lpos % 8; | |
830 | #endif | |
d60d9f65 | 831 | temp = newout - out; |
9255ee31 | 832 | if (lpos + temp >= _rl_screenwidth) |
d60d9f65 SS |
833 | { |
834 | register int temp2; | |
9255ee31 | 835 | temp2 = _rl_screenwidth - lpos; |
1b17e766 | 836 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
837 | inv_lbreaks[++newlines] = out + temp2; |
838 | lpos = temp - temp2; | |
839 | while (out < newout) | |
840 | line[out++] = ' '; | |
841 | } | |
842 | else | |
843 | { | |
844 | while (out < newout) | |
845 | line[out++] = ' '; | |
846 | lpos += temp; | |
847 | } | |
848 | } | |
849 | #endif | |
9255ee31 | 850 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
c862e87b JM |
851 | { |
852 | line[out++] = '\0'; /* XXX - sentinel */ | |
1b17e766 | 853 | CHECK_INV_LBREAKS (); |
c862e87b JM |
854 | inv_lbreaks[++newlines] = out; |
855 | lpos = 0; | |
856 | } | |
d60d9f65 SS |
857 | else if (CTRL_CHAR (c) || c == RUBOUT) |
858 | { | |
859 | line[out++] = '^'; | |
860 | CHECK_LPOS(); | |
861 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
862 | CHECK_LPOS(); | |
863 | } | |
864 | else | |
865 | { | |
9255ee31 | 866 | #if defined (HANDLE_MULTIBYTE) |
5836a818 | 867 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
9255ee31 EZ |
868 | { |
869 | register int i; | |
870 | ||
871 | _rl_wrapped_multicolumn = 0; | |
872 | ||
873 | if (_rl_screenwidth < lpos + wc_width) | |
874 | for (i = lpos; i < _rl_screenwidth; i++) | |
875 | { | |
876 | /* The space will be removed in update_line() */ | |
877 | line[out++] = ' '; | |
878 | _rl_wrapped_multicolumn++; | |
879 | CHECK_LPOS(); | |
880 | } | |
881 | if (in == rl_point) | |
882 | { | |
cc88a640 | 883 | cpos_buffer_position = out; |
9255ee31 EZ |
884 | lb_linenum = newlines; |
885 | } | |
886 | for (i = in; i < in+wc_bytes; i++) | |
887 | line[out++] = rl_line_buffer[i]; | |
888 | for (i = 0; i < wc_width; i++) | |
889 | CHECK_LPOS(); | |
890 | } | |
891 | else | |
892 | { | |
893 | line[out++] = c; | |
894 | CHECK_LPOS(); | |
895 | } | |
896 | #else | |
d60d9f65 SS |
897 | line[out++] = c; |
898 | CHECK_LPOS(); | |
9255ee31 | 899 | #endif |
d60d9f65 | 900 | } |
9255ee31 EZ |
901 | |
902 | #if defined (HANDLE_MULTIBYTE) | |
5836a818 | 903 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
9255ee31 EZ |
904 | { |
905 | in += wc_bytes; | |
cc88a640 | 906 | /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */ |
9255ee31 EZ |
907 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); |
908 | } | |
909 | else | |
910 | in++; | |
911 | #endif | |
912 | ||
d60d9f65 SS |
913 | } |
914 | line[out] = '\0'; | |
cc88a640 | 915 | if (cpos_buffer_position < 0) |
d60d9f65 | 916 | { |
cc88a640 | 917 | cpos_buffer_position = out; |
d60d9f65 SS |
918 | lb_linenum = newlines; |
919 | } | |
920 | ||
921 | inv_botlin = lb_botlin = newlines; | |
1b17e766 | 922 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
923 | inv_lbreaks[newlines+1] = out; |
924 | cursor_linenum = lb_linenum; | |
925 | ||
cc88a640 | 926 | /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed. |
9255ee31 | 927 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
d60d9f65 SS |
928 | |
929 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
930 | line buffers are really multiple lines, which would wrap every | |
931 | (screenwidth - 1) characters. Go through each in turn, finding | |
932 | the changed region and updating it. The line order is top to bottom. */ | |
933 | ||
934 | /* If we can move the cursor up and down, then use multiple lines, | |
935 | otherwise, let long lines display in a single terminal line, and | |
936 | horizontally scroll it. */ | |
5836a818 | 937 | |
9255ee31 | 938 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
d60d9f65 | 939 | { |
5bdf8622 | 940 | int nleft, pos, changed_screen_line, tx; |
d60d9f65 SS |
941 | |
942 | if (!rl_display_fixed || forced_display) | |
943 | { | |
944 | forced_display = 0; | |
945 | ||
946 | /* If we have more than a screenful of material to display, then | |
947 | only display a screenful. We should display the last screen, | |
948 | not the first. */ | |
9255ee31 EZ |
949 | if (out >= _rl_screenchars) |
950 | { | |
5836a818 | 951 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
9255ee31 EZ |
952 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); |
953 | else | |
954 | out = _rl_screenchars - 1; | |
955 | } | |
d60d9f65 SS |
956 | |
957 | /* The first line is at character position 0 in the buffer. The | |
958 | second and subsequent lines start at inv_lbreaks[N], offset by | |
959 | OFFSET (which has already been calculated above). */ | |
960 | ||
cc88a640 JK |
961 | #define INVIS_FIRST() (prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset) |
962 | #define WRAP_OFFSET(line, offset) ((line == 0) \ | |
963 | ? (offset ? INVIS_FIRST() : 0) \ | |
964 | : ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0)) | |
d60d9f65 SS |
965 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) |
966 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) | |
967 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
968 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
969 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) | |
970 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) | |
971 | ||
cc88a640 JK |
972 | #define OLD_CPOS_IN_PROMPT() (cpos_adjusted == 0 && \ |
973 | _rl_last_c_pos != o_cpos && \ | |
974 | _rl_last_c_pos > wrap_offset && \ | |
975 | o_cpos < prompt_last_invisible) | |
976 | ||
d60d9f65 SS |
977 | /* For each line in the buffer, do the updating display. */ |
978 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
979 | { | |
cc88a640 JK |
980 | /* This can lead us astray if we execute a program that changes |
981 | the locale from a non-multibyte to a multibyte one. */ | |
5bdf8622 DJ |
982 | o_cpos = _rl_last_c_pos; |
983 | cpos_adjusted = 0; | |
d60d9f65 SS |
984 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
985 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); | |
986 | ||
5bdf8622 DJ |
987 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
988 | take invisible characters into account, since _rl_last_c_pos | |
989 | is an absolute cursor position in a multibyte locale. See | |
990 | if compensating here is the right thing, or if we have to | |
cc88a640 | 991 | change update_line itself. There are several cases in which |
5bdf8622 DJ |
992 | update_line adjusts _rl_last_c_pos itself (so it can pass |
993 | _rl_move_cursor_relative accurate values); it communicates | |
cc88a640 JK |
994 | this back by setting cpos_adjusted. If we assume that |
995 | _rl_last_c_pos is correct (an absolute cursor position) each | |
996 | time update_line is called, then we can assume in our | |
997 | calculations that o_cpos does not need to be adjusted by | |
998 | wrap_offset. */ | |
5836a818 | 999 | if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && OLD_CPOS_IN_PROMPT()) |
cc88a640 JK |
1000 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ |
1001 | else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth && | |
5836a818 | 1002 | (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
cc88a640 JK |
1003 | cpos_adjusted == 0 && |
1004 | _rl_last_c_pos != o_cpos && | |
1005 | _rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line)) | |
1006 | _rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line); | |
5836a818 | 1007 | |
d60d9f65 SS |
1008 | /* If this is the line with the prompt, we might need to |
1009 | compensate for invisible characters in the new line. Do | |
1010 | this only if there is not more than one new line (which | |
1011 | implies that we completely overwrite the old visible line) | |
1012 | and the new line is shorter than the old. Make sure we are | |
1013 | at the end of the new line before clearing. */ | |
1014 | if (linenum == 0 && | |
1015 | inv_botlin == 0 && _rl_last_c_pos == out && | |
1016 | (wrap_offset > visible_wrap_offset) && | |
1017 | (_rl_last_c_pos < visible_first_line_len)) | |
1018 | { | |
5836a818 | 1019 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5bdf8622 DJ |
1020 | nleft = _rl_screenwidth - _rl_last_c_pos; |
1021 | else | |
1022 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
d60d9f65 SS |
1023 | if (nleft) |
1024 | _rl_clear_to_eol (nleft); | |
1025 | } | |
cc88a640 JK |
1026 | #if 0 |
1027 | /* This segment is intended to handle the case where the prompt | |
1028 | has invisible characters on the second line and the new line | |
1029 | to be displayed needs to clear the rest of the old characters | |
1030 | out (e.g., when printing the i-search prompt). In general, | |
1031 | the case of the new line being shorter than the old. | |
1032 | Incomplete */ | |
1033 | else if (linenum == prompt_last_screen_line && | |
1034 | prompt_physical_chars > _rl_screenwidth && | |
1035 | wrap_offset != prompt_invis_chars_first_line && | |
1036 | _rl_last_c_pos == out && | |
1037 | #endif | |
1038 | ||
d60d9f65 SS |
1039 | |
1040 | /* Since the new first line is now visible, save its length. */ | |
1041 | if (linenum == 0) | |
1042 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; | |
1043 | } | |
1044 | ||
1045 | /* We may have deleted some lines. If so, clear the left over | |
1046 | blank ones at the bottom out. */ | |
1047 | if (_rl_vis_botlin > inv_botlin) | |
1048 | { | |
1049 | char *tt; | |
1050 | for (; linenum <= _rl_vis_botlin; linenum++) | |
1051 | { | |
1052 | tt = VIS_CHARS (linenum); | |
1053 | _rl_move_vert (linenum); | |
1054 | _rl_move_cursor_relative (0, tt); | |
1055 | _rl_clear_to_eol | |
9255ee31 | 1056 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
d60d9f65 SS |
1057 | } |
1058 | } | |
1059 | _rl_vis_botlin = inv_botlin; | |
1060 | ||
1061 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a | |
1062 | different screen line during this redisplay. */ | |
1063 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
1064 | if (changed_screen_line) | |
1065 | { | |
1066 | _rl_move_vert (cursor_linenum); | |
9255ee31 | 1067 | /* If we moved up to the line with the prompt using _rl_term_up, |
c862e87b JM |
1068 | the physical cursor position on the screen stays the same, |
1069 | but the buffer position needs to be adjusted to account | |
1070 | for invisible characters. */ | |
5836a818 | 1071 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
c862e87b | 1072 | _rl_last_c_pos += wrap_offset; |
d60d9f65 SS |
1073 | } |
1074 | ||
1075 | /* We have to reprint the prompt if it contains invisible | |
1076 | characters, since it's not generally OK to just reprint | |
1077 | the characters from the current cursor position. But we | |
1078 | only need to reprint it if the cursor is before the last | |
1079 | invisible character in the prompt string. */ | |
9255ee31 | 1080 | nleft = prompt_visible_length + wrap_offset; |
d60d9f65 | 1081 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
cc88a640 JK |
1082 | #if 0 |
1083 | _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt) | |
1084 | #else | |
1085 | _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt) | |
1086 | #endif | |
d60d9f65 | 1087 | { |
771578d1 SS |
1088 | #if defined (__MSDOS__) |
1089 | putc ('\r', rl_outstream); | |
1090 | #else | |
9255ee31 EZ |
1091 | if (_rl_term_cr) |
1092 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
771578d1 | 1093 | #endif |
cc88a640 JK |
1094 | if (modmark) |
1095 | _rl_output_some_chars ("*", 1); | |
1096 | ||
d60d9f65 | 1097 | _rl_output_some_chars (local_prompt, nleft); |
5836a818 | 1098 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
cc88a640 | 1099 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft, 1) - wrap_offset + modmark; |
9255ee31 | 1100 | else |
cc88a640 | 1101 | _rl_last_c_pos = nleft + modmark; |
d60d9f65 SS |
1102 | } |
1103 | ||
1104 | /* Where on that line? And where does that line start | |
1105 | in the buffer? */ | |
1106 | pos = inv_lbreaks[cursor_linenum]; | |
1107 | /* nleft == number of characters in the line buffer between the | |
cc88a640 JK |
1108 | start of the line and the desired cursor position. */ |
1109 | nleft = cpos_buffer_position - pos; | |
d60d9f65 | 1110 | |
5bdf8622 DJ |
1111 | /* NLEFT is now a number of characters in a buffer. When in a |
1112 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
1113 | position that doesn't take invisible characters in the prompt | |
1114 | into account. We use a fudge factor to compensate. */ | |
1115 | ||
d60d9f65 SS |
1116 | /* Since _rl_backspace() doesn't know about invisible characters in the |
1117 | prompt, and there's no good way to tell it, we compensate for | |
1118 | those characters here and call _rl_backspace() directly. */ | |
1119 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) | |
1120 | { | |
cc88a640 | 1121 | /* TX == new physical cursor position in multibyte locale. */ |
5836a818 | 1122 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
cc88a640 | 1123 | tx = _rl_col_width (&visible_line[pos], 0, nleft, 1) - visible_wrap_offset; |
9255ee31 | 1124 | else |
5bdf8622 | 1125 | tx = nleft; |
cc88a640 | 1126 | if (tx >= 0 && _rl_last_c_pos > tx) |
5bdf8622 DJ |
1127 | { |
1128 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ | |
1129 | _rl_last_c_pos = tx; | |
1130 | } | |
d60d9f65 SS |
1131 | } |
1132 | ||
5bdf8622 DJ |
1133 | /* We need to note that in a multibyte locale we are dealing with |
1134 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1135 | point specified by a buffer position (NLEFT) that doesn't take | |
1136 | invisible characters into account. */ | |
5836a818 | 1137 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
9255ee31 EZ |
1138 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1139 | else if (nleft != _rl_last_c_pos) | |
d60d9f65 SS |
1140 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1141 | } | |
1142 | } | |
1143 | else /* Do horizontal scrolling. */ | |
1144 | { | |
1145 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1146 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1147 | ||
1148 | /* Always at top line. */ | |
1149 | _rl_last_v_pos = 0; | |
1150 | ||
1151 | /* Compute where in the buffer the displayed line should start. This | |
1152 | will be LMARGIN. */ | |
1153 | ||
1154 | /* The number of characters that will be displayed before the cursor. */ | |
cc88a640 | 1155 | ndisp = cpos_buffer_position - wrap_offset; |
9255ee31 | 1156 | nleft = prompt_visible_length + wrap_offset; |
d60d9f65 | 1157 | /* Where the new cursor position will be on the screen. This can be |
c862e87b | 1158 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
cc88a640 | 1159 | phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset); |
9255ee31 | 1160 | t = _rl_screenwidth / 3; |
d60d9f65 SS |
1161 | |
1162 | /* If the number of characters had already exceeded the screenwidth, | |
c862e87b | 1163 | last_lmargin will be > 0. */ |
d60d9f65 SS |
1164 | |
1165 | /* If the number of characters to be displayed is more than the screen | |
c862e87b JM |
1166 | width, compute the starting offset so that the cursor is about |
1167 | two-thirds of the way across the screen. */ | |
9255ee31 | 1168 | if (phys_c_pos > _rl_screenwidth - 2) |
d60d9f65 | 1169 | { |
cc88a640 | 1170 | lmargin = cpos_buffer_position - (2 * t); |
d60d9f65 SS |
1171 | if (lmargin < 0) |
1172 | lmargin = 0; | |
1173 | /* If the left margin would be in the middle of a prompt with | |
1174 | invisible characters, don't display the prompt at all. */ | |
1175 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1176 | lmargin = nleft; | |
1177 | } | |
9255ee31 | 1178 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
c862e87b | 1179 | lmargin = 0; |
d60d9f65 SS |
1180 | else if (phys_c_pos < 1) |
1181 | { | |
1182 | /* If we are moving back towards the beginning of the line and | |
1183 | the last margin is no longer correct, compute a new one. */ | |
cc88a640 | 1184 | lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */ |
d60d9f65 SS |
1185 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
1186 | lmargin = nleft; | |
1187 | } | |
1188 | else | |
c862e87b | 1189 | lmargin = last_lmargin; |
d60d9f65 SS |
1190 | |
1191 | /* If the first character on the screen isn't the first character | |
1192 | in the display line, indicate this with a special character. */ | |
1193 | if (lmargin > 0) | |
1194 | line[lmargin] = '<'; | |
1195 | ||
1196 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
c862e87b JM |
1197 | the whole line, indicate that with a special character at the |
1198 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1199 | wrap offset into account. */ | |
9255ee31 | 1200 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
d60d9f65 | 1201 | if (t < out) |
c862e87b | 1202 | line[t - 1] = '>'; |
d60d9f65 | 1203 | |
cc88a640 | 1204 | if (rl_display_fixed == 0 || forced_display || lmargin != last_lmargin) |
d60d9f65 SS |
1205 | { |
1206 | forced_display = 0; | |
cc88a640 JK |
1207 | o_cpos = _rl_last_c_pos; |
1208 | cpos_adjusted = 0; | |
d60d9f65 SS |
1209 | update_line (&visible_line[last_lmargin], |
1210 | &invisible_line[lmargin], | |
1211 | 0, | |
9255ee31 EZ |
1212 | _rl_screenwidth + visible_wrap_offset, |
1213 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
d60d9f65 SS |
1214 | 0); |
1215 | ||
5836a818 | 1216 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && OLD_CPOS_IN_PROMPT()) |
cc88a640 JK |
1217 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ |
1218 | ||
d60d9f65 SS |
1219 | /* If the visible new line is shorter than the old, but the number |
1220 | of invisible characters is greater, and we are at the end of | |
1221 | the new line, we need to clear to eol. */ | |
1222 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1223 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
5836a818 | 1224 | (_rl_last_c_pos == out) && |
d60d9f65 SS |
1225 | t < visible_first_line_len) |
1226 | { | |
9255ee31 | 1227 | nleft = _rl_screenwidth - t; |
d60d9f65 SS |
1228 | _rl_clear_to_eol (nleft); |
1229 | } | |
1230 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
9255ee31 EZ |
1231 | if (visible_first_line_len > _rl_screenwidth) |
1232 | visible_first_line_len = _rl_screenwidth; | |
d60d9f65 | 1233 | |
cc88a640 | 1234 | _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]); |
d60d9f65 SS |
1235 | last_lmargin = lmargin; |
1236 | } | |
1237 | } | |
1238 | fflush (rl_outstream); | |
1239 | ||
1240 | /* Swap visible and non-visible lines. */ | |
1241 | { | |
cc88a640 | 1242 | struct line_state *vtemp = line_state_visible; |
1b17e766 | 1243 | |
cc88a640 JK |
1244 | line_state_visible = line_state_invisible; |
1245 | line_state_invisible = vtemp; | |
1b17e766 | 1246 | |
d60d9f65 SS |
1247 | rl_display_fixed = 0; |
1248 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1249 | are not displaying any invisible characters, so set visible_wrap_offset | |
1250 | to 0. */ | |
1251 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1252 | visible_wrap_offset = 0; | |
1253 | else | |
1254 | visible_wrap_offset = wrap_offset; | |
1255 | } | |
87adec2e | 1256 | |
cc88a640 | 1257 | RL_UNSETSTATE (RL_STATE_REDISPLAYING); |
87adec2e | 1258 | _rl_release_sigint (); |
d60d9f65 SS |
1259 | } |
1260 | ||
1261 | /* PWP: update_line() is based on finding the middle difference of each | |
1262 | line on the screen; vis: | |
1263 | ||
1264 | /old first difference | |
1265 | /beginning of line | /old last same /old EOL | |
1266 | v v v v | |
1267 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1268 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1269 | ^ ^ ^ ^ | |
1270 | \beginning of line | \new last same \new end of line | |
1271 | \new first difference | |
1272 | ||
1273 | All are character pointers for the sake of speed. Special cases for | |
c862e87b | 1274 | no differences, as well as for end of line additions must be handled. |
d60d9f65 SS |
1275 | |
1276 | Could be made even smarter, but this works well enough */ | |
1277 | static void | |
1278 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1279 | register char *old, *new; | |
1280 | int current_line, omax, nmax, inv_botlin; | |
1281 | { | |
1282 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
cc88a640 | 1283 | int temp, lendiff, wsatend, od, nd, twidth, o_cpos; |
d60d9f65 | 1284 | int current_invis_chars; |
9255ee31 EZ |
1285 | int col_lendiff, col_temp; |
1286 | #if defined (HANDLE_MULTIBYTE) | |
1287 | mbstate_t ps_new, ps_old; | |
cc88a640 | 1288 | int new_offset, old_offset; |
9255ee31 | 1289 | #endif |
d60d9f65 SS |
1290 | |
1291 | /* If we're at the right edge of a terminal that supports xn, we're | |
1292 | ready to wrap around, so do so. This fixes problems with knowing | |
1293 | the exact cursor position and cut-and-paste with certain terminal | |
1294 | emulators. In this calculation, TEMP is the physical screen | |
1295 | position of the cursor. */ | |
5bdf8622 DJ |
1296 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1297 | temp = _rl_last_c_pos; | |
1298 | else | |
cc88a640 | 1299 | temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset); |
9255ee31 EZ |
1300 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
1301 | && _rl_last_v_pos == current_line - 1) | |
d60d9f65 | 1302 | { |
9255ee31 EZ |
1303 | #if defined (HANDLE_MULTIBYTE) |
1304 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1305 | { | |
1306 | wchar_t wc; | |
1307 | mbstate_t ps; | |
1308 | int tempwidth, bytes; | |
1309 | size_t ret; | |
1310 | ||
1311 | /* This fixes only double-column characters, but if the wrapped | |
5836a818 | 1312 | character comsumes more than three columns, spaces will be |
9255ee31 | 1313 | inserted in the string buffer. */ |
cc88a640 JK |
1314 | if (current_line < line_state_visible->wbsize && line_state_visible->wrapped_line[current_line] > 0) |
1315 | _rl_clear_to_eol (line_state_visible->wrapped_line[current_line]); | |
9255ee31 EZ |
1316 | |
1317 | memset (&ps, 0, sizeof (mbstate_t)); | |
1318 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
5bdf8622 | 1319 | if (MB_INVALIDCH (ret)) |
9255ee31 EZ |
1320 | { |
1321 | tempwidth = 1; | |
1322 | ret = 1; | |
1323 | } | |
5bdf8622 | 1324 | else if (MB_NULLWCH (ret)) |
9255ee31 EZ |
1325 | tempwidth = 0; |
1326 | else | |
5836a818 | 1327 | tempwidth = wcwidth (wc); |
9255ee31 EZ |
1328 | |
1329 | if (tempwidth > 0) | |
1330 | { | |
cc88a640 | 1331 | int count, i; |
9255ee31 EZ |
1332 | bytes = ret; |
1333 | for (count = 0; count < bytes; count++) | |
1334 | putc (new[count], rl_outstream); | |
1335 | _rl_last_c_pos = tempwidth; | |
1336 | _rl_last_v_pos++; | |
1337 | memset (&ps, 0, sizeof (mbstate_t)); | |
1338 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1339 | if (ret != 0 && bytes != 0) | |
1340 | { | |
5bdf8622 | 1341 | if (MB_INVALIDCH (ret)) |
cc88a640 JK |
1342 | ret = 1; |
1343 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
9255ee31 | 1344 | memcpy (old, new, bytes); |
cc88a640 JK |
1345 | /* Fix up indices if we copy data from one line to another */ |
1346 | omax += bytes - ret; | |
5836a818 | 1347 | for (i = current_line+1; i < inv_botlin+1; i++) |
cc88a640 | 1348 | vis_lbreaks[i] += bytes - ret; |
9255ee31 EZ |
1349 | } |
1350 | } | |
1351 | else | |
1352 | { | |
1353 | putc (' ', rl_outstream); | |
1354 | _rl_last_c_pos = 1; | |
1355 | _rl_last_v_pos++; | |
1356 | if (old[0] && new[0]) | |
1357 | old[0] = new[0]; | |
1358 | } | |
1359 | } | |
d60d9f65 | 1360 | else |
9255ee31 EZ |
1361 | #endif |
1362 | { | |
1363 | if (new[0]) | |
1364 | putc (new[0], rl_outstream); | |
1365 | else | |
1366 | putc (' ', rl_outstream); | |
5bdf8622 | 1367 | _rl_last_c_pos = 1; |
9255ee31 EZ |
1368 | _rl_last_v_pos++; |
1369 | if (old[0] && new[0]) | |
1370 | old[0] = new[0]; | |
1371 | } | |
d60d9f65 | 1372 | } |
9255ee31 | 1373 | |
d60d9f65 SS |
1374 | |
1375 | /* Find first difference. */ | |
9255ee31 EZ |
1376 | #if defined (HANDLE_MULTIBYTE) |
1377 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1378 | { | |
5bdf8622 DJ |
1379 | /* See if the old line is a subset of the new line, so that the |
1380 | only change is adding characters. */ | |
1381 | temp = (omax < nmax) ? omax : nmax; | |
cc88a640 | 1382 | if (memcmp (old, new, temp) == 0) /* adding at the end */ |
9255ee31 | 1383 | { |
5bdf8622 DJ |
1384 | ofd = old + temp; |
1385 | nfd = new + temp; | |
1386 | } | |
1387 | else | |
1388 | { | |
1389 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1390 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1391 | ||
1392 | if (omax == nmax && STREQN (new, old, omax)) | |
1393 | { | |
1394 | ofd = old + omax; | |
1395 | nfd = new + nmax; | |
1396 | } | |
1397 | else | |
1398 | { | |
1399 | new_offset = old_offset = 0; | |
1400 | for (ofd = old, nfd = new; | |
1401 | (ofd - old < omax) && *ofd && | |
1402 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1403 | { | |
1404 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1405 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1406 | ofd = old + old_offset; | |
1407 | nfd = new + new_offset; | |
1408 | } | |
1409 | } | |
9255ee31 EZ |
1410 | } |
1411 | } | |
1412 | else | |
1413 | #endif | |
d60d9f65 SS |
1414 | for (ofd = old, nfd = new; |
1415 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1416 | ofd++, nfd++) | |
1417 | ; | |
1418 | ||
1419 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1420 | of the distance between ne and new and oe and old, respectively, to | |
1421 | move a subtraction out of each loop. */ | |
1422 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1423 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1424 | ||
1425 | /* If no difference, continue to next line. */ | |
1426 | if (ofd == oe && nfd == ne) | |
1427 | return; | |
1428 | ||
1429 | wsatend = 1; /* flag for trailing whitespace */ | |
9255ee31 EZ |
1430 | |
1431 | #if defined (HANDLE_MULTIBYTE) | |
1432 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1433 | { | |
1434 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1435 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1436 | while ((ols > ofd) && (nls > nfd)) | |
1437 | { | |
1438 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1439 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1440 | ||
5bdf8622 DJ |
1441 | #if 0 |
1442 | /* On advice from jir@yamato.ibm.com */ | |
9255ee31 EZ |
1443 | _rl_adjust_point (old, ols - old, &ps_old); |
1444 | _rl_adjust_point (new, nls - new, &ps_new); | |
5bdf8622 | 1445 | #endif |
9255ee31 EZ |
1446 | |
1447 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1448 | break; | |
1449 | ||
1450 | if (*ols == ' ') | |
1451 | wsatend = 0; | |
1452 | ||
1453 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1454 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1455 | } | |
1456 | } | |
1457 | else | |
1458 | { | |
1459 | #endif /* HANDLE_MULTIBYTE */ | |
d60d9f65 SS |
1460 | ols = oe - 1; /* find last same */ |
1461 | nls = ne - 1; | |
1462 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1463 | { | |
1464 | if (*ols != ' ') | |
1465 | wsatend = 0; | |
1466 | ols--; | |
1467 | nls--; | |
1468 | } | |
9255ee31 EZ |
1469 | #if defined (HANDLE_MULTIBYTE) |
1470 | } | |
1471 | #endif | |
d60d9f65 SS |
1472 | |
1473 | if (wsatend) | |
1474 | { | |
1475 | ols = oe; | |
1476 | nls = ne; | |
1477 | } | |
9255ee31 EZ |
1478 | #if defined (HANDLE_MULTIBYTE) |
1479 | /* This may not work for stateful encoding, but who cares? To handle | |
1480 | stateful encoding properly, we have to scan each string from the | |
1481 | beginning and compare. */ | |
1482 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1483 | #else | |
d60d9f65 | 1484 | else if (*ols != *nls) |
9255ee31 | 1485 | #endif |
d60d9f65 SS |
1486 | { |
1487 | if (*ols) /* don't step past the NUL */ | |
9255ee31 EZ |
1488 | { |
1489 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1490 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1491 | else | |
1492 | ols++; | |
1493 | } | |
d60d9f65 | 1494 | if (*nls) |
9255ee31 EZ |
1495 | { |
1496 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1497 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1498 | else | |
1499 | nls++; | |
1500 | } | |
d60d9f65 SS |
1501 | } |
1502 | ||
1503 | /* count of invisible characters in the current invisible line. */ | |
1504 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1505 | if (_rl_last_v_pos != current_line) | |
1506 | { | |
1507 | _rl_move_vert (current_line); | |
5bdf8622 | 1508 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
d60d9f65 SS |
1509 | _rl_last_c_pos += visible_wrap_offset; |
1510 | } | |
1511 | ||
1512 | /* If this is the first line and there are invisible characters in the | |
1513 | prompt string, and the prompt string has not changed, and the current | |
1514 | cursor position is before the last invisible character in the prompt, | |
1515 | and the index of the character to move to is past the end of the prompt | |
1516 | string, then redraw the entire prompt string. We can only do this | |
1517 | reliably if the terminal supports a `cr' capability. | |
1518 | ||
1519 | This is not an efficiency hack -- there is a problem with redrawing | |
1520 | portions of the prompt string if they contain terminal escape | |
1521 | sequences (like drawing the `unbold' sequence without a corresponding | |
1522 | `bold') that manifests itself on certain terminals. */ | |
1523 | ||
cc88a640 | 1524 | lendiff = local_prompt_len; |
d60d9f65 SS |
1525 | od = ofd - old; /* index of first difference in visible line */ |
1526 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
9255ee31 | 1527 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
cc88a640 | 1528 | od >= lendiff && _rl_last_c_pos < PROMPT_ENDING_INDEX) |
d60d9f65 | 1529 | { |
771578d1 SS |
1530 | #if defined (__MSDOS__) |
1531 | putc ('\r', rl_outstream); | |
1532 | #else | |
9255ee31 | 1533 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1b17e766 | 1534 | #endif |
cc88a640 JK |
1535 | if (modmark) |
1536 | _rl_output_some_chars ("*", 1); | |
d60d9f65 | 1537 | _rl_output_some_chars (local_prompt, lendiff); |
9255ee31 | 1538 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5bdf8622 DJ |
1539 | { |
1540 | /* We take wrap_offset into account here so we can pass correct | |
1541 | information to _rl_move_cursor_relative. */ | |
cc88a640 | 1542 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff, 1) - wrap_offset + modmark; |
5bdf8622 DJ |
1543 | cpos_adjusted = 1; |
1544 | } | |
9255ee31 | 1545 | else |
cc88a640 | 1546 | _rl_last_c_pos = lendiff + modmark; |
d60d9f65 SS |
1547 | } |
1548 | ||
cc88a640 JK |
1549 | o_cpos = _rl_last_c_pos; |
1550 | ||
1551 | /* When this function returns, _rl_last_c_pos is correct, and an absolute | |
5836a818 | 1552 | cursor postion in multibyte mode, but a buffer index when not in a |
cc88a640 | 1553 | multibyte locale. */ |
d60d9f65 | 1554 | _rl_move_cursor_relative (od, old); |
5836a818 | 1555 | #if 1 |
cc88a640 JK |
1556 | #if defined (HANDLE_MULTIBYTE) |
1557 | /* We need to indicate that the cursor position is correct in the presence of | |
1558 | invisible characters in the prompt string. Let's see if setting this when | |
1559 | we make sure we're at the end of the drawn prompt string works. */ | |
1560 | if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 && | |
1561 | (_rl_last_c_pos > 0 || o_cpos > 0) && | |
1562 | _rl_last_c_pos == prompt_physical_chars) | |
1563 | cpos_adjusted = 1; | |
5836a818 | 1564 | #endif |
cc88a640 | 1565 | #endif |
d60d9f65 | 1566 | |
9255ee31 | 1567 | /* if (len (new) > len (old)) |
5836a818 PP |
1568 | lendiff == difference in buffer |
1569 | col_lendiff == difference on screen | |
9255ee31 | 1570 | When not using multibyte characters, these are equal */ |
d60d9f65 | 1571 | lendiff = (nls - nfd) - (ols - ofd); |
9255ee31 | 1572 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
cc88a640 | 1573 | col_lendiff = _rl_col_width (new, nfd - new, nls - new, 1) - _rl_col_width (old, ofd - old, ols - old, 1); |
9255ee31 EZ |
1574 | else |
1575 | col_lendiff = lendiff; | |
d60d9f65 SS |
1576 | |
1577 | /* If we are changing the number of invisible characters in a line, and | |
1578 | the spot of first difference is before the end of the invisible chars, | |
1579 | lendiff needs to be adjusted. */ | |
5836a818 | 1580 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
d60d9f65 | 1581 | current_invis_chars != visible_wrap_offset) |
9255ee31 EZ |
1582 | { |
1583 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1584 | { | |
1585 | lendiff += visible_wrap_offset - current_invis_chars; | |
1586 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1587 | } | |
1588 | else | |
1589 | { | |
1590 | lendiff += visible_wrap_offset - current_invis_chars; | |
1591 | col_lendiff = lendiff; | |
1592 | } | |
1593 | } | |
d60d9f65 SS |
1594 | |
1595 | /* Insert (diff (len (old), len (new)) ch. */ | |
1596 | temp = ne - nfd; | |
9255ee31 | 1597 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
cc88a640 | 1598 | col_temp = _rl_col_width (new, nfd - new, ne - new, 1); |
9255ee31 EZ |
1599 | else |
1600 | col_temp = temp; | |
1601 | ||
1602 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
d60d9f65 SS |
1603 | { |
1604 | /* Non-zero if we're increasing the number of lines. */ | |
1605 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
cc88a640 JK |
1606 | /* If col_lendiff is > 0, implying that the new string takes up more |
1607 | screen real estate than the old, but lendiff is < 0, meaning that it | |
1608 | takes fewer bytes, we need to just output the characters starting | |
1609 | from the first difference. These will overwrite what is on the | |
1610 | display, so there's no reason to do a smart update. This can really | |
1611 | only happen in a multibyte environment. */ | |
1612 | if (lendiff < 0) | |
1613 | { | |
1614 | _rl_output_some_chars (nfd, temp); | |
5836a818 | 1615 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp, 1); |
cc88a640 JK |
1616 | /* If nfd begins before any invisible characters in the prompt, |
1617 | adjust _rl_last_c_pos to account for wrap_offset and set | |
1618 | cpos_adjusted to let the caller know. */ | |
5836a818 | 1619 | if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
cc88a640 JK |
1620 | { |
1621 | _rl_last_c_pos -= wrap_offset; | |
1622 | cpos_adjusted = 1; | |
1623 | } | |
1624 | return; | |
1625 | } | |
d60d9f65 SS |
1626 | /* Sometimes it is cheaper to print the characters rather than |
1627 | use the terminal's capabilities. If we're growing the number | |
1628 | of lines, make sure we actually cause the new line to wrap | |
1629 | around on auto-wrapping terminals. */ | |
cc88a640 | 1630 | else if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
d60d9f65 | 1631 | { |
9255ee31 | 1632 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
d60d9f65 | 1633 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
9255ee31 | 1634 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
d60d9f65 | 1635 | invisible characters. We need to just draw them. */ |
cc88a640 JK |
1636 | /* The same thing happens if we're trying to draw before the last |
1637 | invisible character in the prompt string or we're increasing the | |
1638 | number of invisible characters in the line and we're not drawing | |
1639 | the entire prompt string. */ | |
1640 | if (*ols && ((_rl_horizontal_scroll_mode && | |
1641 | _rl_last_c_pos == 0 && | |
1642 | lendiff > prompt_visible_length && | |
1643 | current_invis_chars > 0) == 0) && | |
1644 | (((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && | |
1645 | current_line == 0 && wrap_offset && | |
1646 | ((nfd - new) <= prompt_last_invisible) && | |
1647 | (col_lendiff < prompt_visible_length)) == 0) && | |
1648 | (visible_wrap_offset >= current_invis_chars)) | |
d60d9f65 | 1649 | { |
5836a818 PP |
1650 | insert_some_chars (nfd, lendiff, col_lendiff); |
1651 | _rl_last_c_pos += col_lendiff; | |
1652 | } | |
1653 | #if 0 /* XXX - for now */ | |
1654 | else if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && _rl_last_c_pos == 0 && wrap_offset && (nfd-new) <= prompt_last_invisible && col_lendiff < prompt_visible_length && visible_wrap_offset >= current_invis_chars) | |
1655 | { | |
1656 | _rl_output_some_chars (nfd, lendiff); | |
1657 | _rl_last_c_pos += col_lendiff; | |
cc88a640 | 1658 | } |
5836a818 | 1659 | #endif |
5bdf8622 | 1660 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
d60d9f65 SS |
1661 | { |
1662 | /* At the end of a line the characters do not have to | |
1663 | be "inserted". They can just be placed on the screen. */ | |
5836a818 PP |
1664 | /* However, this screws up the rest of this block, which |
1665 | assumes you've done the insert because you can. */ | |
1666 | _rl_output_some_chars (nfd, lendiff); | |
1667 | _rl_last_c_pos += col_lendiff; | |
d60d9f65 | 1668 | } |
5836a818 | 1669 | else |
d60d9f65 | 1670 | { |
d60d9f65 | 1671 | _rl_output_some_chars (nfd, temp); |
9255ee31 | 1672 | _rl_last_c_pos += col_temp; |
cc88a640 JK |
1673 | /* If nfd begins before the last invisible character in the |
1674 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1675 | and set cpos_adjusted to let the caller know. */ | |
5836a818 | 1676 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
cc88a640 JK |
1677 | { |
1678 | _rl_last_c_pos -= wrap_offset; | |
1679 | cpos_adjusted = 1; | |
1680 | } | |
d60d9f65 SS |
1681 | return; |
1682 | } | |
5836a818 PP |
1683 | /* Copy (new) chars to screen from first diff to last match. */ |
1684 | temp = nls - nfd; | |
1685 | if ((temp - lendiff) > 0) | |
d60d9f65 | 1686 | { |
5836a818 PP |
1687 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); |
1688 | /* XXX -- this bears closer inspection. Fixes a redisplay bug | |
1689 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1690 | multibyte characters and prompt strings with invisible | |
1691 | characters, but was previously disabled. */ | |
1692 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1693 | twidth = _rl_col_width (nfd+lendiff, 0, temp-col_lendiff, 1); | |
1694 | else | |
1695 | twidth = temp - lendiff; | |
1696 | _rl_last_c_pos += twidth; | |
cc88a640 JK |
1697 | /* If nfd begins before the last invisible character in the |
1698 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1699 | and set cpos_adjusted to let the caller know. */ | |
5836a818 | 1700 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
cc88a640 JK |
1701 | { |
1702 | _rl_last_c_pos -= wrap_offset; | |
1703 | cpos_adjusted = 1; | |
1704 | } | |
d60d9f65 SS |
1705 | } |
1706 | } | |
1707 | else | |
1708 | { | |
1709 | /* cannot insert chars, write to EOL */ | |
1710 | _rl_output_some_chars (nfd, temp); | |
9255ee31 | 1711 | _rl_last_c_pos += col_temp; |
5bdf8622 DJ |
1712 | /* If we're in a multibyte locale and were before the last invisible |
1713 | char in the current line (which implies we just output some invisible | |
1714 | characters) we need to adjust _rl_last_c_pos, since it represents | |
1715 | a physical character position. */ | |
cc88a640 JK |
1716 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
1717 | current_line == prompt_last_screen_line && wrap_offset && | |
1718 | wrap_offset != prompt_invis_chars_first_line && | |
1719 | ((nfd-new) < (prompt_last_invisible-(current_line*_rl_screenwidth)))) | |
1720 | { | |
1721 | _rl_last_c_pos -= wrap_offset - prompt_invis_chars_first_line; | |
1722 | cpos_adjusted = 1; | |
1723 | } | |
d60d9f65 SS |
1724 | } |
1725 | } | |
1726 | else /* Delete characters from line. */ | |
1727 | { | |
1728 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
9255ee31 | 1729 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
d60d9f65 SS |
1730 | { |
1731 | /* If all we're doing is erasing the invisible characters in the | |
1732 | prompt string, don't bother. It screws up the assumptions | |
1733 | about what's on the screen. */ | |
1734 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1735 | -lendiff == visible_wrap_offset) | |
9255ee31 | 1736 | col_lendiff = 0; |
d60d9f65 | 1737 | |
9255ee31 EZ |
1738 | if (col_lendiff) |
1739 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
d60d9f65 | 1740 | |
5836a818 PP |
1741 | /* Copy (new) chars to screen from first diff to last match */ |
1742 | temp = nls - nfd; | |
1743 | if (temp > 0) | |
d60d9f65 | 1744 | { |
cc88a640 JK |
1745 | /* If nfd begins at the prompt, or before the invisible |
1746 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1747 | in a multibyte locale to account for the wrap offset and | |
1748 | set cpos_adjusted accordingly. */ | |
5836a818 | 1749 | _rl_output_some_chars (nfd, temp); |
cc88a640 JK |
1750 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1751 | { | |
5836a818 PP |
1752 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp, 1); |
1753 | if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
cc88a640 JK |
1754 | { |
1755 | _rl_last_c_pos -= wrap_offset; | |
1756 | cpos_adjusted = 1; | |
1757 | } | |
1758 | } | |
1759 | else | |
5836a818 | 1760 | _rl_last_c_pos += temp; |
d60d9f65 SS |
1761 | } |
1762 | } | |
1763 | /* Otherwise, print over the existing material. */ | |
1764 | else | |
1765 | { | |
1766 | if (temp > 0) | |
1767 | { | |
cc88a640 JK |
1768 | /* If nfd begins at the prompt, or before the invisible |
1769 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1770 | in a multibyte locale to account for the wrap offset and | |
1771 | set cpos_adjusted accordingly. */ | |
d60d9f65 | 1772 | _rl_output_some_chars (nfd, temp); |
5bdf8622 | 1773 | _rl_last_c_pos += col_temp; /* XXX */ |
cc88a640 JK |
1774 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1775 | { | |
5836a818 | 1776 | if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
cc88a640 JK |
1777 | { |
1778 | _rl_last_c_pos -= wrap_offset; | |
1779 | cpos_adjusted = 1; | |
1780 | } | |
1781 | } | |
d60d9f65 SS |
1782 | } |
1783 | lendiff = (oe - old) - (ne - new); | |
9255ee31 | 1784 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
cc88a640 | 1785 | col_lendiff = _rl_col_width (old, 0, oe - old, 1) - _rl_col_width (new, 0, ne - new, 1); |
9255ee31 EZ |
1786 | else |
1787 | col_lendiff = lendiff; | |
1788 | ||
5836a818 PP |
1789 | #if 0 |
1790 | if (col_lendiff) | |
1791 | #else | |
cc88a640 JK |
1792 | /* If we've already printed over the entire width of the screen, |
1793 | including the old material, then col_lendiff doesn't matter and | |
1794 | space_to_eol will insert too many spaces. XXX - maybe we should | |
1795 | adjust col_lendiff based on the difference between _rl_last_c_pos | |
1796 | and _rl_screenwidth */ | |
1797 | if (col_lendiff && ((MB_CUR_MAX == 1 || rl_byte_oriented) || (_rl_last_c_pos < _rl_screenwidth))) | |
5836a818 | 1798 | #endif |
c862e87b JM |
1799 | { |
1800 | if (_rl_term_autowrap && current_line < inv_botlin) | |
9255ee31 | 1801 | space_to_eol (col_lendiff); |
c862e87b | 1802 | else |
9255ee31 | 1803 | _rl_clear_to_eol (col_lendiff); |
c862e87b | 1804 | } |
d60d9f65 SS |
1805 | } |
1806 | } | |
1807 | } | |
1808 | ||
1809 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
1810 | int | |
1811 | rl_on_new_line () | |
1812 | { | |
1813 | if (visible_line) | |
1814 | visible_line[0] = '\0'; | |
1815 | ||
1816 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1817 | _rl_vis_botlin = last_lmargin = 0; | |
1818 | if (vis_lbreaks) | |
1819 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1820 | visible_wrap_offset = 0; | |
1821 | return 0; | |
1822 | } | |
1823 | ||
1b17e766 EZ |
1824 | /* Tell the update routines that we have moved onto a new line with the |
1825 | prompt already displayed. Code originally from the version of readline | |
5bdf8622 DJ |
1826 | distributed with CLISP. rl_expand_prompt must have already been called |
1827 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
1b17e766 EZ |
1828 | int |
1829 | rl_on_new_line_with_prompt () | |
1830 | { | |
1831 | int prompt_size, i, l, real_screenwidth, newlines; | |
5bdf8622 | 1832 | char *prompt_last_line, *lprompt; |
1b17e766 EZ |
1833 | |
1834 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1835 | the already-displayed prompt. */ | |
1836 | prompt_size = strlen (rl_prompt) + 1; | |
1837 | init_line_structures (prompt_size); | |
1838 | ||
1839 | /* Make sure the line structures hold the already-displayed prompt for | |
1840 | redisplay. */ | |
5bdf8622 DJ |
1841 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1842 | strcpy (visible_line, lprompt); | |
1843 | strcpy (invisible_line, lprompt); | |
1b17e766 EZ |
1844 | |
1845 | /* If the prompt contains newlines, take the last tail. */ | |
1846 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1847 | if (!prompt_last_line) | |
1848 | prompt_last_line = rl_prompt; | |
1849 | ||
1850 | l = strlen (prompt_last_line); | |
9255ee31 | 1851 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
cc88a640 | 1852 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l, 1); /* XXX */ |
9255ee31 EZ |
1853 | else |
1854 | _rl_last_c_pos = l; | |
1b17e766 EZ |
1855 | |
1856 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1857 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1858 | one less, see terminal.c. */ | |
9255ee31 | 1859 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
1b17e766 EZ |
1860 | _rl_last_v_pos = l / real_screenwidth; |
1861 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1862 | whether the cursor is at the end of the last line, or already at the | |
1863 | beginning of the next line. Output a newline just to be safe. */ | |
1864 | if (l > 0 && (l % real_screenwidth) == 0) | |
1865 | _rl_output_some_chars ("\n", 1); | |
1866 | last_lmargin = 0; | |
1867 | ||
1868 | newlines = 0; i = 0; | |
1869 | while (i <= l) | |
1870 | { | |
1871 | _rl_vis_botlin = newlines; | |
1872 | vis_lbreaks[newlines++] = i; | |
1873 | i += real_screenwidth; | |
1874 | } | |
1875 | vis_lbreaks[newlines] = l; | |
1876 | visible_wrap_offset = 0; | |
1877 | ||
5bdf8622 DJ |
1878 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1879 | ||
1b17e766 EZ |
1880 | return 0; |
1881 | } | |
1882 | ||
d60d9f65 SS |
1883 | /* Actually update the display, period. */ |
1884 | int | |
1885 | rl_forced_update_display () | |
1886 | { | |
cc88a640 JK |
1887 | register char *temp; |
1888 | ||
d60d9f65 SS |
1889 | if (visible_line) |
1890 | { | |
cc88a640 | 1891 | temp = visible_line; |
d60d9f65 | 1892 | while (*temp) |
c862e87b | 1893 | *temp++ = '\0'; |
d60d9f65 SS |
1894 | } |
1895 | rl_on_new_line (); | |
1896 | forced_display++; | |
1897 | (*rl_redisplay_function) (); | |
1898 | return 0; | |
1899 | } | |
1900 | ||
1901 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
5bdf8622 DJ |
1902 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
1903 | buffer index.) | |
d60d9f65 SS |
1904 | DATA is the contents of the screen line of interest; i.e., where |
1905 | the movement is being done. */ | |
1906 | void | |
1907 | _rl_move_cursor_relative (new, data) | |
1908 | int new; | |
9255ee31 | 1909 | const char *data; |
d60d9f65 SS |
1910 | { |
1911 | register int i; | |
5bdf8622 DJ |
1912 | int woff; /* number of invisible chars on current line */ |
1913 | int cpos, dpos; /* current and desired cursor positions */ | |
cc88a640 | 1914 | int adjust; |
d60d9f65 | 1915 | |
cc88a640 | 1916 | woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset); |
5bdf8622 | 1917 | cpos = _rl_last_c_pos; |
cc88a640 JK |
1918 | |
1919 | if (cpos == 0 && cpos == new) | |
1920 | return; | |
1921 | ||
9255ee31 EZ |
1922 | #if defined (HANDLE_MULTIBYTE) |
1923 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1924 | a multibyte string, but _rl_last_c_pos is the display position. In | |
288381c0 | 1925 | this case, NEW's display position is not obvious and must be |
5bdf8622 DJ |
1926 | calculated. We need to account for invisible characters in this line, |
1927 | as long as we are past them and they are counted by _rl_col_width. */ | |
1928 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
288381c0 | 1929 | { |
cc88a640 JK |
1930 | adjust = 1; |
1931 | /* Try to short-circuit common cases and eliminate a bunch of multibyte | |
1932 | character function calls. */ | |
1933 | /* 1. prompt string */ | |
1934 | if (new == local_prompt_len && memcmp (data, local_prompt, new) == 0) | |
1935 | { | |
1936 | dpos = prompt_physical_chars; | |
1937 | cpos_adjusted = 1; | |
1938 | adjust = 0; | |
1939 | } | |
1940 | /* 2. prompt_string + line contents */ | |
1941 | else if (new > local_prompt_len && local_prompt && memcmp (data, local_prompt, local_prompt_len) == 0) | |
1942 | { | |
1943 | dpos = prompt_physical_chars + _rl_col_width (data, local_prompt_len, new, 1); | |
1944 | cpos_adjusted = 1; | |
1945 | adjust = 0; | |
1946 | } | |
1947 | else | |
1948 | dpos = _rl_col_width (data, 0, new, 1); | |
1949 | ||
1950 | /* Use NEW when comparing against the last invisible character in the | |
1951 | prompt string, since they're both buffer indices and DPOS is a | |
1952 | desired display position. */ | |
1953 | if (adjust && ((new > prompt_last_invisible) || /* XXX - don't use woff here */ | |
1954 | (prompt_physical_chars >= _rl_screenwidth && | |
1955 | _rl_last_v_pos == prompt_last_screen_line && | |
1956 | wrap_offset >= woff && dpos >= woff && | |
1957 | new > (prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset)))) | |
1958 | /* XXX last comparison might need to be >= */ | |
1959 | { | |
1960 | dpos -= woff; | |
1961 | /* Since this will be assigned to _rl_last_c_pos at the end (more | |
1962 | precisely, _rl_last_c_pos == dpos when this function returns), | |
1963 | let the caller know. */ | |
1964 | cpos_adjusted = 1; | |
1965 | } | |
288381c0 | 1966 | } |
5bdf8622 | 1967 | else |
9255ee31 | 1968 | #endif |
5bdf8622 DJ |
1969 | dpos = new; |
1970 | ||
1971 | /* If we don't have to do anything, then return. */ | |
1972 | if (cpos == dpos) | |
1973 | return; | |
d60d9f65 SS |
1974 | |
1975 | /* It may be faster to output a CR, and then move forwards instead | |
1976 | of moving backwards. */ | |
1977 | /* i == current physical cursor position. */ | |
5bdf8622 DJ |
1978 | #if defined (HANDLE_MULTIBYTE) |
1979 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1980 | i = _rl_last_c_pos; | |
1981 | else | |
1982 | #endif | |
1983 | i = _rl_last_c_pos - woff; | |
cc88a640 | 1984 | if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) || |
9255ee31 | 1985 | (_rl_term_autowrap && i == _rl_screenwidth)) |
d60d9f65 SS |
1986 | { |
1987 | #if defined (__MSDOS__) | |
1988 | putc ('\r', rl_outstream); | |
1989 | #else | |
9255ee31 | 1990 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
d60d9f65 | 1991 | #endif /* !__MSDOS__ */ |
5bdf8622 | 1992 | cpos = _rl_last_c_pos = 0; |
d60d9f65 SS |
1993 | } |
1994 | ||
5bdf8622 | 1995 | if (cpos < dpos) |
d60d9f65 SS |
1996 | { |
1997 | /* Move the cursor forward. We do it by printing the command | |
1998 | to move the cursor forward if there is one, else print that | |
1999 | portion of the output buffer again. Which is cheaper? */ | |
2000 | ||
2001 | /* The above comment is left here for posterity. It is faster | |
2002 | to print one character (non-control) than to print a control | |
2003 | sequence telling the terminal to move forward one character. | |
2004 | That kind of control is for people who don't know what the | |
2005 | data is underneath the cursor. */ | |
cc88a640 JK |
2006 | |
2007 | /* However, we need a handle on where the current display position is | |
2008 | in the buffer for the immediately preceding comment to be true. | |
2009 | In multibyte locales, we don't currently have that info available. | |
2010 | Without it, we don't know where the data we have to display begins | |
2011 | in the buffer and we have to go back to the beginning of the screen | |
2012 | line. In this case, we can use the terminal sequence to move forward | |
2013 | if it's available. */ | |
9255ee31 EZ |
2014 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
2015 | { | |
cc88a640 JK |
2016 | if (_rl_term_forward_char) |
2017 | { | |
2018 | for (i = cpos; i < dpos; i++) | |
2019 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
2020 | } | |
2021 | else | |
2022 | { | |
2023 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2024 | for (i = 0; i < new; i++) | |
2025 | putc (data[i], rl_outstream); | |
2026 | } | |
9255ee31 | 2027 | } |
d60d9f65 | 2028 | else |
5bdf8622 | 2029 | for (i = cpos; i < new; i++) |
d60d9f65 | 2030 | putc (data[i], rl_outstream); |
d60d9f65 | 2031 | } |
5bdf8622 | 2032 | |
9255ee31 EZ |
2033 | #if defined (HANDLE_MULTIBYTE) |
2034 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
2035 | The byte length of the string is probably bigger than the column width | |
2036 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
2037 | display point is less than _rl_last_c_pos. */ | |
9255ee31 | 2038 | #endif |
5bdf8622 DJ |
2039 | else if (cpos > dpos) |
2040 | _rl_backspace (cpos - dpos); | |
9255ee31 | 2041 | |
5bdf8622 | 2042 | _rl_last_c_pos = dpos; |
d60d9f65 SS |
2043 | } |
2044 | ||
2045 | /* PWP: move the cursor up or down. */ | |
2046 | void | |
2047 | _rl_move_vert (to) | |
2048 | int to; | |
2049 | { | |
2050 | register int delta, i; | |
2051 | ||
9255ee31 | 2052 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
d60d9f65 SS |
2053 | return; |
2054 | ||
d60d9f65 SS |
2055 | if ((delta = to - _rl_last_v_pos) > 0) |
2056 | { | |
2057 | for (i = 0; i < delta; i++) | |
2058 | putc ('\n', rl_outstream); | |
1b17e766 EZ |
2059 | #if defined (__MSDOS__) |
2060 | putc ('\r', rl_outstream); | |
2061 | #else | |
9255ee31 | 2062 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1b17e766 | 2063 | #endif |
d60d9f65 SS |
2064 | _rl_last_c_pos = 0; |
2065 | } | |
2066 | else | |
2067 | { /* delta < 0 */ | |
5836a818 | 2068 | #ifdef __MSDOS__ |
30083a32 EZ |
2069 | int row, col; |
2070 | ||
5836a818 | 2071 | fflush (rl_outstream); /* make sure the cursor pos is current! */ |
30083a32 | 2072 | ScreenGetCursor (&row, &col); |
b0f0a30e | 2073 | ScreenSetCursor (row + delta, col); |
5836a818 PP |
2074 | i = -delta; /* in case someone wants to use it after the loop */ |
2075 | #else /* !__MSDOS__ */ | |
9255ee31 | 2076 | if (_rl_term_up && *_rl_term_up) |
d60d9f65 | 2077 | for (i = 0; i < -delta; i++) |
9255ee31 | 2078 | tputs (_rl_term_up, 1, _rl_output_character_function); |
5836a818 | 2079 | #endif /* !__MSDOS__ */ |
d60d9f65 | 2080 | } |
1b17e766 | 2081 | |
d60d9f65 SS |
2082 | _rl_last_v_pos = to; /* Now TO is here */ |
2083 | } | |
2084 | ||
2085 | /* Physically print C on rl_outstream. This is for functions which know | |
2086 | how to optimize the display. Return the number of characters output. */ | |
2087 | int | |
2088 | rl_show_char (c) | |
2089 | int c; | |
2090 | { | |
2091 | int n = 1; | |
2092 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
2093 | { | |
2094 | fprintf (rl_outstream, "M-"); | |
2095 | n += 2; | |
2096 | c = UNMETA (c); | |
2097 | } | |
2098 | ||
2099 | #if defined (DISPLAY_TABS) | |
2100 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) | |
2101 | #else | |
2102 | if (CTRL_CHAR (c) || c == RUBOUT) | |
2103 | #endif /* !DISPLAY_TABS */ | |
2104 | { | |
2105 | fprintf (rl_outstream, "C-"); | |
2106 | n += 2; | |
2107 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
2108 | } | |
2109 | ||
2110 | putc (c, rl_outstream); | |
2111 | fflush (rl_outstream); | |
2112 | return n; | |
2113 | } | |
2114 | ||
2115 | int | |
2116 | rl_character_len (c, pos) | |
2117 | register int c, pos; | |
2118 | { | |
2119 | unsigned char uc; | |
2120 | ||
2121 | uc = (unsigned char)c; | |
2122 | ||
2123 | if (META_CHAR (uc)) | |
2124 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
2125 | ||
2126 | if (uc == '\t') | |
2127 | { | |
2128 | #if defined (DISPLAY_TABS) | |
2129 | return (((pos | 7) + 1) - pos); | |
2130 | #else | |
2131 | return (2); | |
2132 | #endif /* !DISPLAY_TABS */ | |
2133 | } | |
2134 | ||
2135 | if (CTRL_CHAR (c) || c == RUBOUT) | |
2136 | return (2); | |
2137 | ||
9255ee31 | 2138 | return ((ISPRINT (uc)) ? 1 : 2); |
d60d9f65 | 2139 | } |
d60d9f65 SS |
2140 | /* How to print things in the "echo-area". The prompt is treated as a |
2141 | mini-modeline. */ | |
5bdf8622 | 2142 | static int msg_saved_prompt = 0; |
d60d9f65 SS |
2143 | |
2144 | #if defined (USE_VARARGS) | |
2145 | int | |
2146 | #if defined (PREFER_STDARG) | |
2147 | rl_message (const char *format, ...) | |
2148 | #else | |
2149 | rl_message (va_alist) | |
2150 | va_dcl | |
2151 | #endif | |
2152 | { | |
2153 | va_list args; | |
2154 | #if defined (PREFER_VARARGS) | |
2155 | char *format; | |
2156 | #endif | |
2157 | ||
2158 | #if defined (PREFER_STDARG) | |
2159 | va_start (args, format); | |
2160 | #else | |
2161 | va_start (args); | |
2162 | format = va_arg (args, char *); | |
2163 | #endif | |
2164 | ||
9255ee31 | 2165 | #if defined (HAVE_VSNPRINTF) |
5836a818 | 2166 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); |
9255ee31 | 2167 | #else |
d60d9f65 | 2168 | vsprintf (msg_buf, format, args); |
5836a818 | 2169 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
9255ee31 | 2170 | #endif |
d60d9f65 SS |
2171 | va_end (args); |
2172 | ||
5bdf8622 DJ |
2173 | if (saved_local_prompt == 0) |
2174 | { | |
2175 | rl_save_prompt (); | |
2176 | msg_saved_prompt = 1; | |
2177 | } | |
d60d9f65 | 2178 | rl_display_prompt = msg_buf; |
5836a818 PP |
2179 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
2180 | &prompt_last_invisible, | |
2181 | &prompt_invis_chars_first_line, | |
2182 | &prompt_physical_chars); | |
5bdf8622 | 2183 | local_prompt_prefix = (char *)NULL; |
cc88a640 | 2184 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
d60d9f65 | 2185 | (*rl_redisplay_function) (); |
5bdf8622 | 2186 | |
d60d9f65 SS |
2187 | return 0; |
2188 | } | |
2189 | #else /* !USE_VARARGS */ | |
2190 | int | |
2191 | rl_message (format, arg1, arg2) | |
2192 | char *format; | |
2193 | { | |
2194 | sprintf (msg_buf, format, arg1, arg2); | |
5836a818 | 2195 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
5bdf8622 | 2196 | |
d60d9f65 | 2197 | rl_display_prompt = msg_buf; |
5bdf8622 DJ |
2198 | if (saved_local_prompt == 0) |
2199 | { | |
2200 | rl_save_prompt (); | |
2201 | msg_saved_prompt = 1; | |
2202 | } | |
5836a818 PP |
2203 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
2204 | &prompt_last_invisible, | |
2205 | &prompt_invis_chars_first_line, | |
2206 | &prompt_physical_chars); | |
5bdf8622 | 2207 | local_prompt_prefix = (char *)NULL; |
cc88a640 | 2208 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
d60d9f65 | 2209 | (*rl_redisplay_function) (); |
5bdf8622 | 2210 | |
d60d9f65 SS |
2211 | return 0; |
2212 | } | |
2213 | #endif /* !USE_VARARGS */ | |
2214 | ||
2215 | /* How to clear things from the "echo-area". */ | |
2216 | int | |
2217 | rl_clear_message () | |
2218 | { | |
2219 | rl_display_prompt = rl_prompt; | |
5bdf8622 DJ |
2220 | if (msg_saved_prompt) |
2221 | { | |
2222 | rl_restore_prompt (); | |
2223 | msg_saved_prompt = 0; | |
2224 | } | |
d60d9f65 SS |
2225 | (*rl_redisplay_function) (); |
2226 | return 0; | |
2227 | } | |
2228 | ||
2229 | int | |
2230 | rl_reset_line_state () | |
2231 | { | |
2232 | rl_on_new_line (); | |
2233 | ||
2234 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
2235 | forced_display = 1; | |
2236 | return 0; | |
2237 | } | |
2238 | ||
d60d9f65 | 2239 | void |
c862e87b | 2240 | rl_save_prompt () |
d60d9f65 SS |
2241 | { |
2242 | saved_local_prompt = local_prompt; | |
2243 | saved_local_prefix = local_prompt_prefix; | |
5bdf8622 | 2244 | saved_prefix_length = prompt_prefix_length; |
cc88a640 | 2245 | saved_local_length = local_prompt_len; |
9255ee31 EZ |
2246 | saved_last_invisible = prompt_last_invisible; |
2247 | saved_visible_length = prompt_visible_length; | |
5bdf8622 DJ |
2248 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
2249 | saved_physical_chars = prompt_physical_chars; | |
d60d9f65 SS |
2250 | |
2251 | local_prompt = local_prompt_prefix = (char *)0; | |
cc88a640 | 2252 | local_prompt_len = 0; |
5bdf8622 DJ |
2253 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
2254 | prompt_invis_chars_first_line = prompt_physical_chars = 0; | |
d60d9f65 SS |
2255 | } |
2256 | ||
2257 | void | |
c862e87b | 2258 | rl_restore_prompt () |
d60d9f65 | 2259 | { |
9255ee31 EZ |
2260 | FREE (local_prompt); |
2261 | FREE (local_prompt_prefix); | |
d60d9f65 SS |
2262 | |
2263 | local_prompt = saved_local_prompt; | |
2264 | local_prompt_prefix = saved_local_prefix; | |
cc88a640 | 2265 | local_prompt_len = saved_local_length; |
5bdf8622 | 2266 | prompt_prefix_length = saved_prefix_length; |
9255ee31 EZ |
2267 | prompt_last_invisible = saved_last_invisible; |
2268 | prompt_visible_length = saved_visible_length; | |
5bdf8622 DJ |
2269 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
2270 | prompt_physical_chars = saved_physical_chars; | |
2271 | ||
2272 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
2273 | saved_local_prompt = saved_local_prefix = (char *)0; | |
cc88a640 | 2274 | saved_local_length = 0; |
5bdf8622 DJ |
2275 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; |
2276 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
d60d9f65 SS |
2277 | } |
2278 | ||
2279 | char * | |
2280 | _rl_make_prompt_for_search (pchar) | |
2281 | int pchar; | |
2282 | { | |
2283 | int len; | |
5bdf8622 | 2284 | char *pmt, *p; |
d60d9f65 | 2285 | |
c862e87b | 2286 | rl_save_prompt (); |
d60d9f65 | 2287 | |
5bdf8622 DJ |
2288 | /* We've saved the prompt, and can do anything with the various prompt |
2289 | strings we need before they're restored. We want the unexpanded | |
2290 | portion of the prompt string after any final newline. */ | |
2291 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; | |
2292 | if (p == 0) | |
d60d9f65 SS |
2293 | { |
2294 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
9255ee31 | 2295 | pmt = (char *)xmalloc (len + 2); |
d60d9f65 | 2296 | if (len) |
c862e87b | 2297 | strcpy (pmt, rl_prompt); |
d60d9f65 SS |
2298 | pmt[len] = pchar; |
2299 | pmt[len+1] = '\0'; | |
2300 | } | |
2301 | else | |
2302 | { | |
5bdf8622 DJ |
2303 | p++; |
2304 | len = strlen (p); | |
9255ee31 | 2305 | pmt = (char *)xmalloc (len + 2); |
d60d9f65 | 2306 | if (len) |
5bdf8622 | 2307 | strcpy (pmt, p); |
d60d9f65 SS |
2308 | pmt[len] = pchar; |
2309 | pmt[len+1] = '\0'; | |
5bdf8622 DJ |
2310 | } |
2311 | ||
2312 | /* will be overwritten by expand_prompt, called from rl_message */ | |
2313 | prompt_physical_chars = saved_physical_chars + 1; | |
d60d9f65 SS |
2314 | return pmt; |
2315 | } | |
2316 | ||
2317 | /* Quick redisplay hack when erasing characters at the end of the line. */ | |
2318 | void | |
2319 | _rl_erase_at_end_of_line (l) | |
2320 | int l; | |
2321 | { | |
2322 | register int i; | |
2323 | ||
2324 | _rl_backspace (l); | |
2325 | for (i = 0; i < l; i++) | |
2326 | putc (' ', rl_outstream); | |
2327 | _rl_backspace (l); | |
2328 | for (i = 0; i < l; i++) | |
2329 | visible_line[--_rl_last_c_pos] = '\0'; | |
2330 | rl_display_fixed++; | |
2331 | } | |
2332 | ||
2333 | /* Clear to the end of the line. COUNT is the minimum | |
2334 | number of character spaces to clear, */ | |
2335 | void | |
2336 | _rl_clear_to_eol (count) | |
2337 | int count; | |
2338 | { | |
30083a32 | 2339 | #ifndef __MSDOS__ |
9255ee31 EZ |
2340 | if (_rl_term_clreol) |
2341 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
30083a32 EZ |
2342 | else |
2343 | #endif | |
5836a818 PP |
2344 | if (count) |
2345 | space_to_eol (count); | |
d60d9f65 SS |
2346 | } |
2347 | ||
2348 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2349 | number of character spaces to clear, */ | |
2350 | static void | |
2351 | space_to_eol (count) | |
2352 | int count; | |
2353 | { | |
2354 | register int i; | |
2355 | ||
2356 | for (i = 0; i < count; i++) | |
2357 | putc (' ', rl_outstream); | |
2358 | ||
2359 | _rl_last_c_pos += count; | |
2360 | } | |
2361 | ||
2362 | void | |
2363 | _rl_clear_screen () | |
2364 | { | |
5836a818 PP |
2365 | #if defined (__GO32__) |
2366 | ScreenClear (); /* FIXME: only works in text modes */ | |
2367 | ScreenSetCursor (0, 0); /* term_clrpag is "cl" which homes the cursor */ | |
2368 | #else | |
9255ee31 EZ |
2369 | if (_rl_term_clrpag) |
2370 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d60d9f65 | 2371 | else |
9255ee31 | 2372 | rl_crlf (); |
5836a818 | 2373 | #endif |
d60d9f65 SS |
2374 | } |
2375 | ||
9255ee31 | 2376 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
d60d9f65 | 2377 | static void |
9255ee31 | 2378 | insert_some_chars (string, count, col) |
d60d9f65 | 2379 | char *string; |
9255ee31 | 2380 | int count, col; |
d60d9f65 | 2381 | { |
7f3c5ec8 | 2382 | #if defined (__MSDOS__) || (defined (__MINGW32__) && !defined (NCURSES_VERSION)) |
30083a32 | 2383 | _rl_output_some_chars (string, count); |
5836a818 PP |
2384 | #else |
2385 | /* DEBUGGING */ | |
2386 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2387 | if (count != col) | |
2388 | _rl_ttymsg ("debug: insert_some_chars: count (%d) != col (%d)", count, col); | |
9255ee31 | 2389 | |
d60d9f65 | 2390 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
9255ee31 | 2391 | if (_rl_term_IC) |
d60d9f65 | 2392 | { |
5836a818 PP |
2393 | char *buffer; |
2394 | ||
9255ee31 | 2395 | buffer = tgoto (_rl_term_IC, 0, col); |
d60d9f65 | 2396 | tputs (buffer, 1, _rl_output_character_function); |
5836a818 | 2397 | _rl_output_some_chars (string, count); |
d60d9f65 | 2398 | } |
5836a818 | 2399 | else |
4a11f206 | 2400 | { |
5836a818 PP |
2401 | register int i; |
2402 | ||
2403 | /* If we have to turn on insert-mode, then do so. */ | |
2404 | if (_rl_term_im && *_rl_term_im) | |
2405 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
2406 | ||
4a11f206 PP |
2407 | /* If there is a special command for inserting characters, then |
2408 | use that first to open up the space. */ | |
5836a818 PP |
2409 | if (_rl_term_ic && *_rl_term_ic) |
2410 | { | |
2411 | for (i = col; i--; ) | |
2412 | tputs (_rl_term_ic, 1, _rl_output_character_function); | |
2413 | } | |
2414 | ||
2415 | /* Print the text. */ | |
2416 | _rl_output_some_chars (string, count); | |
2417 | ||
2418 | /* If there is a string to turn off insert mode, we had best use | |
2419 | it now. */ | |
2420 | if (_rl_term_ei && *_rl_term_ei) | |
2421 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
4a11f206 | 2422 | } |
5836a818 | 2423 | #endif /* __MSDOS__ || __MINGW32__ */ |
d60d9f65 SS |
2424 | } |
2425 | ||
2426 | /* Delete COUNT characters from the display line. */ | |
2427 | static void | |
2428 | delete_chars (count) | |
2429 | int count; | |
2430 | { | |
9255ee31 | 2431 | if (count > _rl_screenwidth) /* XXX */ |
d60d9f65 SS |
2432 | return; |
2433 | ||
7f3c5ec8 | 2434 | #if !defined (__MSDOS__) && !(defined (__MINGW32__) && !defined (NCURSES_VERSION)) |
9255ee31 | 2435 | if (_rl_term_DC && *_rl_term_DC) |
d60d9f65 SS |
2436 | { |
2437 | char *buffer; | |
9255ee31 | 2438 | buffer = tgoto (_rl_term_DC, count, count); |
d60d9f65 SS |
2439 | tputs (buffer, count, _rl_output_character_function); |
2440 | } | |
2441 | else | |
2442 | { | |
9255ee31 | 2443 | if (_rl_term_dc && *_rl_term_dc) |
d60d9f65 | 2444 | while (count--) |
9255ee31 | 2445 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
d60d9f65 | 2446 | } |
5836a818 | 2447 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
d60d9f65 SS |
2448 | } |
2449 | ||
2450 | void | |
2451 | _rl_update_final () | |
2452 | { | |
2453 | int full_lines; | |
2454 | ||
2455 | full_lines = 0; | |
2456 | /* If the cursor is the only thing on an otherwise-blank last line, | |
2457 | compensate so we don't print an extra CRLF. */ | |
2458 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
2459 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) | |
2460 | { | |
2461 | _rl_vis_botlin--; | |
2462 | full_lines = 1; | |
2463 | } | |
2464 | _rl_move_vert (_rl_vis_botlin); | |
2465 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ | |
9255ee31 | 2466 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
d60d9f65 SS |
2467 | { |
2468 | char *last_line; | |
9255ee31 | 2469 | |
1b17e766 | 2470 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
cc88a640 JK |
2471 | cpos_buffer_position = -1; /* don't know where we are in buffer */ |
2472 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */ | |
d60d9f65 | 2473 | _rl_clear_to_eol (0); |
9255ee31 | 2474 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
d60d9f65 SS |
2475 | } |
2476 | _rl_vis_botlin = 0; | |
9255ee31 | 2477 | rl_crlf (); |
d60d9f65 SS |
2478 | fflush (rl_outstream); |
2479 | rl_display_fixed++; | |
2480 | } | |
2481 | ||
2482 | /* Move to the start of the current line. */ | |
2483 | static void | |
2484 | cr () | |
2485 | { | |
9255ee31 | 2486 | if (_rl_term_cr) |
d60d9f65 | 2487 | { |
771578d1 SS |
2488 | #if defined (__MSDOS__) |
2489 | putc ('\r', rl_outstream); | |
2490 | #else | |
9255ee31 | 2491 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1b17e766 | 2492 | #endif |
d60d9f65 SS |
2493 | _rl_last_c_pos = 0; |
2494 | } | |
2495 | } | |
2496 | ||
1b17e766 EZ |
2497 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2498 | terminal escape sequences. Called with the cursor at column 0 of the | |
2499 | line to draw the prompt on. */ | |
2500 | static void | |
2501 | redraw_prompt (t) | |
2502 | char *t; | |
2503 | { | |
5bdf8622 | 2504 | char *oldp; |
1b17e766 | 2505 | |
1b17e766 | 2506 | oldp = rl_display_prompt; |
5bdf8622 | 2507 | rl_save_prompt (); |
1b17e766 EZ |
2508 | |
2509 | rl_display_prompt = t; | |
5836a818 | 2510 | local_prompt = expand_prompt (t, &prompt_visible_length, |
9255ee31 | 2511 | &prompt_last_invisible, |
5bdf8622 DJ |
2512 | &prompt_invis_chars_first_line, |
2513 | &prompt_physical_chars); | |
1b17e766 | 2514 | local_prompt_prefix = (char *)NULL; |
cc88a640 | 2515 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
5bdf8622 | 2516 | |
1b17e766 EZ |
2517 | rl_forced_update_display (); |
2518 | ||
2519 | rl_display_prompt = oldp; | |
5bdf8622 | 2520 | rl_restore_prompt(); |
1b17e766 EZ |
2521 | } |
2522 | ||
d60d9f65 SS |
2523 | /* Redisplay the current line after a SIGWINCH is received. */ |
2524 | void | |
2525 | _rl_redisplay_after_sigwinch () | |
2526 | { | |
1b17e766 | 2527 | char *t; |
d60d9f65 | 2528 | |
cc88a640 JK |
2529 | /* Clear the last line (assuming that the screen size change will result in |
2530 | either more or fewer characters on that line only) and put the cursor at | |
2531 | column 0. Make sure the right thing happens if we have wrapped to a new | |
2532 | screen line. */ | |
9255ee31 | 2533 | if (_rl_term_cr) |
d60d9f65 | 2534 | { |
cc88a640 JK |
2535 | _rl_move_vert (_rl_vis_botlin); |
2536 | ||
771578d1 SS |
2537 | #if defined (__MSDOS__) |
2538 | putc ('\r', rl_outstream); | |
2539 | #else | |
9255ee31 | 2540 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
1b17e766 | 2541 | #endif |
d60d9f65 | 2542 | _rl_last_c_pos = 0; |
771578d1 | 2543 | #if defined (__MSDOS__) |
9255ee31 | 2544 | space_to_eol (_rl_screenwidth); |
771578d1 SS |
2545 | putc ('\r', rl_outstream); |
2546 | #else | |
9255ee31 EZ |
2547 | if (_rl_term_clreol) |
2548 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d60d9f65 SS |
2549 | else |
2550 | { | |
9255ee31 EZ |
2551 | space_to_eol (_rl_screenwidth); |
2552 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
d60d9f65 | 2553 | } |
771578d1 | 2554 | #endif |
d60d9f65 SS |
2555 | if (_rl_last_v_pos > 0) |
2556 | _rl_move_vert (0); | |
2557 | } | |
2558 | else | |
9255ee31 | 2559 | rl_crlf (); |
d60d9f65 SS |
2560 | |
2561 | /* Redraw only the last line of a multi-line prompt. */ | |
2562 | t = strrchr (rl_display_prompt, '\n'); | |
2563 | if (t) | |
1b17e766 | 2564 | redraw_prompt (++t); |
d60d9f65 SS |
2565 | else |
2566 | rl_forced_update_display (); | |
2567 | } | |
2568 | ||
2569 | void | |
2570 | _rl_clean_up_for_exit () | |
2571 | { | |
cc88a640 | 2572 | if (_rl_echoing_p) |
d60d9f65 | 2573 | { |
5836a818 | 2574 | _rl_move_vert (_rl_vis_botlin); |
d60d9f65 SS |
2575 | _rl_vis_botlin = 0; |
2576 | fflush (rl_outstream); | |
c862e87b | 2577 | rl_restart_output (1, 0); |
d60d9f65 SS |
2578 | } |
2579 | } | |
c862e87b JM |
2580 | |
2581 | void | |
2582 | _rl_erase_entire_line () | |
2583 | { | |
2584 | cr (); | |
2585 | _rl_clear_to_eol (0); | |
2586 | cr (); | |
2587 | fflush (rl_outstream); | |
2588 | } | |
1b17e766 EZ |
2589 | |
2590 | /* return the `current display line' of the cursor -- the number of lines to | |
2591 | move up to get to the first screen line of the current readline line. */ | |
2592 | int | |
2593 | _rl_current_display_line () | |
2594 | { | |
2595 | int ret, nleft; | |
2596 | ||
2597 | /* Find out whether or not there might be invisible characters in the | |
2598 | editing buffer. */ | |
2599 | if (rl_display_prompt == rl_prompt) | |
9255ee31 | 2600 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
1b17e766 | 2601 | else |
9255ee31 | 2602 | nleft = _rl_last_c_pos - _rl_screenwidth; |
1b17e766 EZ |
2603 | |
2604 | if (nleft > 0) | |
9255ee31 | 2605 | ret = 1 + nleft / _rl_screenwidth; |
1b17e766 EZ |
2606 | else |
2607 | ret = 0; | |
2608 | ||
2609 | return ret; | |
2610 | } | |
9255ee31 EZ |
2611 | |
2612 | #if defined (HANDLE_MULTIBYTE) | |
2613 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2614 | In the case of multibyte characters with stateful encoding, we have to | |
2615 | scan from the beginning of the string to take the state into account. */ | |
2616 | static int | |
cc88a640 | 2617 | _rl_col_width (str, start, end, flags) |
288381c0 | 2618 | const char *str; |
cc88a640 | 2619 | int start, end, flags; |
9255ee31 EZ |
2620 | { |
2621 | wchar_t wc; | |
cc88a640 | 2622 | mbstate_t ps; |
9255ee31 EZ |
2623 | int tmp, point, width, max; |
2624 | ||
2625 | if (end <= start) | |
2626 | return 0; | |
cc88a640 | 2627 | if (MB_CUR_MAX == 1 || rl_byte_oriented) |
5836a818 PP |
2628 | { |
2629 | _rl_ttymsg ("_rl_col_width: called with MB_CUR_MAX == 1"); | |
cc88a640 | 2630 | return (end - start); |
5836a818 | 2631 | } |
cc88a640 JK |
2632 | |
2633 | memset (&ps, 0, sizeof (mbstate_t)); | |
9255ee31 EZ |
2634 | |
2635 | point = 0; | |
2636 | max = end; | |
2637 | ||
cc88a640 JK |
2638 | /* Try to short-circuit common cases. The adjustment to remove wrap_offset |
2639 | is done by the caller. */ | |
2640 | /* 1. prompt string */ | |
2641 | if (flags && start == 0 && end == local_prompt_len && memcmp (str, local_prompt, local_prompt_len) == 0) | |
2642 | return (prompt_physical_chars + wrap_offset); | |
2643 | /* 2. prompt string + line contents */ | |
2644 | else if (flags && start == 0 && local_prompt_len > 0 && end > local_prompt_len && local_prompt && memcmp (str, local_prompt, local_prompt_len) == 0) | |
2645 | { | |
2646 | tmp = prompt_physical_chars + wrap_offset; | |
2647 | /* XXX - try to call ourselves recursively with non-prompt portion */ | |
2648 | tmp += _rl_col_width (str, local_prompt_len, end, flags); | |
2649 | return (tmp); | |
2650 | } | |
2651 | ||
9255ee31 EZ |
2652 | while (point < start) |
2653 | { | |
2654 | tmp = mbrlen (str + point, max, &ps); | |
5bdf8622 | 2655 | if (MB_INVALIDCH ((size_t)tmp)) |
9255ee31 EZ |
2656 | { |
2657 | /* In this case, the bytes are invalid or too short to compose a | |
2658 | multibyte character, so we assume that the first byte represents | |
2659 | a single character. */ | |
2660 | point++; | |
2661 | max--; | |
2662 | ||
2663 | /* Clear the state of the byte sequence, because in this case the | |
2664 | effect of mbstate is undefined. */ | |
2665 | memset (&ps, 0, sizeof (mbstate_t)); | |
2666 | } | |
5bdf8622 DJ |
2667 | else if (MB_NULLWCH (tmp)) |
2668 | break; /* Found '\0' */ | |
9255ee31 EZ |
2669 | else |
2670 | { | |
2671 | point += tmp; | |
2672 | max -= tmp; | |
2673 | } | |
2674 | } | |
2675 | ||
2676 | /* If START is not a byte that starts a character, then POINT will be | |
2677 | greater than START. In this case, assume that (POINT - START) gives | |
2678 | a byte count that is the number of columns of difference. */ | |
2679 | width = point - start; | |
2680 | ||
2681 | while (point < end) | |
2682 | { | |
2683 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
5bdf8622 | 2684 | if (MB_INVALIDCH ((size_t)tmp)) |
9255ee31 EZ |
2685 | { |
2686 | /* In this case, the bytes are invalid or too short to compose a | |
2687 | multibyte character, so we assume that the first byte represents | |
2688 | a single character. */ | |
2689 | point++; | |
2690 | max--; | |
2691 | ||
2692 | /* and assume that the byte occupies a single column. */ | |
2693 | width++; | |
2694 | ||
2695 | /* Clear the state of the byte sequence, because in this case the | |
2696 | effect of mbstate is undefined. */ | |
2697 | memset (&ps, 0, sizeof (mbstate_t)); | |
2698 | } | |
5bdf8622 DJ |
2699 | else if (MB_NULLWCH (tmp)) |
2700 | break; /* Found '\0' */ | |
9255ee31 EZ |
2701 | else |
2702 | { | |
2703 | point += tmp; | |
2704 | max -= tmp; | |
5836a818 | 2705 | tmp = wcwidth(wc); |
9255ee31 EZ |
2706 | width += (tmp >= 0) ? tmp : 1; |
2707 | } | |
2708 | } | |
2709 | ||
2710 | width += point - end; | |
2711 | ||
2712 | return width; | |
2713 | } | |
2714 | #endif /* HANDLE_MULTIBYTE */ |