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Commit | Line | Data |
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726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
9697d2dc | 3 | /* Copyright (C) 1987-2006 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of the GNU Readline Library, a library for | |
6 | reading lines of text with interactive input and history editing. | |
7 | ||
8 | The GNU Readline Library is free software; you can redistribute it | |
9 | and/or modify it under the terms of the GNU General Public License | |
bb70624e | 10 | as published by the Free Software Foundation; either version 2, or |
726f6388 JA |
11 | (at your option) any later version. |
12 | ||
13 | The GNU Readline Library is distributed in the hope that it will be | |
14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | The GNU General Public License is often shipped with GNU software, and | |
19 | is generally kept in a file called COPYING or LICENSE. If you do not | |
20 | have a copy of the license, write to the Free Software Foundation, | |
bb70624e | 21 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 JA |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
ccc6cda3 | 25 | # include <config.h> |
726f6388 JA |
26 | #endif |
27 | ||
726f6388 JA |
28 | #include <sys/types.h> |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
d166f048 JA |
34 | #include "posixstat.h" |
35 | ||
726f6388 JA |
36 | #if defined (HAVE_STDLIB_H) |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
d166f048 JA |
42 | #include <stdio.h> |
43 | ||
726f6388 JA |
44 | /* System-specific feature definitions and include files. */ |
45 | #include "rldefs.h" | |
7117c2d2 | 46 | #include "rlmbutil.h" |
726f6388 | 47 | |
ccc6cda3 JA |
48 | /* Termcap library stuff. */ |
49 | #include "tcap.h" | |
50 | ||
726f6388 JA |
51 | /* Some standard library routines. */ |
52 | #include "readline.h" | |
53 | #include "history.h" | |
54 | ||
bb70624e JA |
55 | #include "rlprivate.h" |
56 | #include "xmalloc.h" | |
57 | ||
726f6388 JA |
58 | #if !defined (strchr) && !defined (__STDC__) |
59 | extern char *strchr (), *strrchr (); | |
60 | #endif /* !strchr && !__STDC__ */ | |
61 | ||
f73dda09 JA |
62 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
63 | static void space_to_eol PARAMS((int)); | |
64 | static void delete_chars PARAMS((int)); | |
7117c2d2 | 65 | static void insert_some_chars PARAMS((char *, int, int)); |
f73dda09 | 66 | static void cr PARAMS((void)); |
ccc6cda3 | 67 | |
906833f0 CR |
68 | /* State of visible and invisible lines. */ |
69 | struct line_state | |
70 | { | |
71 | char *line; | |
72 | int *lbreaks; | |
73 | int lbsize; | |
74 | #if defined (HANDLE_MULTIBYTE) | |
75 | int *wrapped_line; | |
76 | int wbsize; | |
77 | #endif | |
78 | }; | |
79 | ||
80 | /* The line display buffers. One is the line currently displayed on | |
81 | the screen. The other is the line about to be displayed. */ | |
82 | static struct line_state line_state_array[2]; | |
83 | static struct line_state *line_state_visible = &line_state_array[0]; | |
84 | static struct line_state *line_state_invisible = &line_state_array[1]; | |
85 | ||
86 | /* Backwards-compatible names. */ | |
87 | #define inv_lbreaks (line_state_invisible->lbreaks) | |
88 | #define inv_lbsize (line_state_invisible->lbsize) | |
89 | #define vis_lbreaks (line_state_visible->lbreaks) | |
90 | #define vis_lbsize (line_state_visible->lbsize) | |
91 | ||
92 | #define visible_line (line_state_visible->line) | |
93 | #define invisible_line (line_state_invisible->line) | |
94 | ||
7117c2d2 | 95 | #if defined (HANDLE_MULTIBYTE) |
d3a24ed2 | 96 | static int _rl_col_width PARAMS((const char *, int, int)); |
7117c2d2 JA |
97 | #else |
98 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
99 | #endif | |
100 | ||
726f6388 | 101 | /* Heuristic used to decide whether it is faster to move from CUR to NEW |
9697d2dc CR |
102 | by backing up or outputting a carriage return and moving forward. CUR |
103 | and NEW are either both buffer positions or absolute screen positions. */ | |
726f6388 JA |
104 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) |
105 | ||
ac18b312 CR |
106 | /* _rl_last_c_pos is an absolute cursor position in multibyte locales and a |
107 | buffer index in others. This macro is used when deciding whether the | |
108 | current cursor position is in the middle of a prompt string containing | |
109 | invisible characters. */ | |
110 | #define PROMPT_ENDING_INDEX \ | |
2abb7255 | 111 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1) |
ac18b312 CR |
112 | |
113 | ||
726f6388 JA |
114 | /* **************************************************************** */ |
115 | /* */ | |
116 | /* Display stuff */ | |
117 | /* */ | |
118 | /* **************************************************************** */ | |
119 | ||
120 | /* This is the stuff that is hard for me. I never seem to write good | |
121 | display routines in C. Let's see how I do this time. */ | |
122 | ||
123 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
124 | the problems of input lines longer than the screen width. | |
125 | ||
126 | update_line and the code that calls it makes a multiple line, | |
127 | automatically wrapping line update. Careful attention needs | |
128 | to be paid to the vertical position variables. */ | |
129 | ||
130 | /* Keep two buffers; one which reflects the current contents of the | |
131 | screen, and the other to draw what we think the new contents should | |
132 | be. Then compare the buffers, and make whatever changes to the | |
133 | screen itself that we should. Finally, make the buffer that we | |
134 | just drew into be the one which reflects the current contents of the | |
135 | screen, and place the cursor where it belongs. | |
136 | ||
137 | Commands that want to can fix the display themselves, and then let | |
138 | this function know that the display has been fixed by setting the | |
139 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
140 | ||
ccc6cda3 | 141 | /* Application-specific redisplay function. */ |
28ef6c31 | 142 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 143 | |
726f6388 JA |
144 | /* Global variables declared here. */ |
145 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
146 | int rl_display_fixed = 0; | |
147 | ||
ccc6cda3 | 148 | int _rl_suppress_redisplay = 0; |
798a67db | 149 | int _rl_want_redisplay = 0; |
ccc6cda3 | 150 | |
726f6388 JA |
151 | /* The stuff that gets printed out before the actual text of the line. |
152 | This is usually pointing to rl_prompt. */ | |
153 | char *rl_display_prompt = (char *)NULL; | |
154 | ||
155 | /* Pseudo-global variables declared here. */ | |
177d51f7 | 156 | |
726f6388 | 157 | /* The visible cursor position. If you print some text, adjust this. */ |
177d51f7 CR |
158 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
159 | supporting multibyte characters, and an absolute cursor position when | |
160 | in such a locale. This is an artifact of the donated multibyte support. | |
161 | Care must be taken when modifying its value. */ | |
726f6388 JA |
162 | int _rl_last_c_pos = 0; |
163 | int _rl_last_v_pos = 0; | |
164 | ||
5c26afb8 | 165 | static int cpos_adjusted; |
9697d2dc | 166 | static int cpos_buffer_position; |
5c26afb8 | 167 | |
726f6388 JA |
168 | /* Number of lines currently on screen minus 1. */ |
169 | int _rl_vis_botlin = 0; | |
170 | ||
171 | /* Variables used only in this file. */ | |
172 | /* The last left edge of text that was displayed. This is used when | |
173 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 174 | static int last_lmargin; |
726f6388 | 175 | |
726f6388 JA |
176 | /* A buffer for `modeline' messages. */ |
177 | static char msg_buf[128]; | |
178 | ||
179 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 180 | static int forced_display; |
726f6388 JA |
181 | |
182 | /* Default and initial buffer size. Can grow. */ | |
183 | static int line_size = 1024; | |
184 | ||
28ef6c31 JA |
185 | /* Variables to keep track of the expanded prompt string, which may |
186 | include invisible characters. */ | |
187 | ||
726f6388 | 188 | static char *local_prompt, *local_prompt_prefix; |
0ad312a5 | 189 | static int local_prompt_len; |
28ef6c31 | 190 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
191 | |
192 | /* The number of invisible characters in the line currently being | |
193 | displayed on the screen. */ | |
ccc6cda3 JA |
194 | static int visible_wrap_offset; |
195 | ||
28ef6c31 JA |
196 | /* The number of invisible characters in the prompt string. Static so it |
197 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
198 | static int wrap_offset; |
199 | ||
28ef6c31 JA |
200 | /* The index of the last invisible character in the prompt string. */ |
201 | static int prompt_last_invisible; | |
726f6388 JA |
202 | |
203 | /* The length (buffer offset) of the first line of the last (possibly | |
204 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 205 | static int visible_first_line_len; |
726f6388 | 206 | |
28ef6c31 JA |
207 | /* Number of invisible characters on the first physical line of the prompt. |
208 | Only valid when the number of physical characters in the prompt exceeds | |
209 | (or is equal to) _rl_screenwidth. */ | |
210 | static int prompt_invis_chars_first_line; | |
211 | ||
212 | static int prompt_last_screen_line; | |
213 | ||
43cdcad8 CR |
214 | static int prompt_physical_chars; |
215 | ||
6e70dbff CR |
216 | /* Variables to save and restore prompt and display information. */ |
217 | ||
218 | /* These are getting numerous enough that it's time to create a struct. */ | |
219 | ||
220 | static char *saved_local_prompt; | |
221 | static char *saved_local_prefix; | |
222 | static int saved_last_invisible; | |
223 | static int saved_visible_length; | |
224 | static int saved_prefix_length; | |
e7f1978a | 225 | static int saved_local_length; |
6e70dbff CR |
226 | static int saved_invis_chars_first_line; |
227 | static int saved_physical_chars; | |
228 | ||
726f6388 JA |
229 | /* Expand the prompt string S and return the number of visible |
230 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 231 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
232 | index of the last invisible character in the returned string. NIFLP, |
233 | if non-zero, is a place to store the number of invisible characters in | |
43cdcad8 CR |
234 | the first prompt line. The previous are used as byte counts -- indexes |
235 | into a character buffer. */ | |
726f6388 JA |
236 | |
237 | /* Current implementation: | |
238 | \001 (^A) start non-visible characters | |
239 | \002 (^B) end non-visible characters | |
240 | all characters except \001 and \002 (following a \001) are copied to | |
241 | the returned string; all characters except those between \001 and | |
242 | \002 are assumed to be `visible'. */ | |
243 | ||
244 | static char * | |
43cdcad8 | 245 | expand_prompt (pmt, lp, lip, niflp, vlp) |
726f6388 | 246 | char *pmt; |
43cdcad8 | 247 | int *lp, *lip, *niflp, *vlp; |
726f6388 | 248 | { |
5e4a95c7 | 249 | char *r, *ret, *p, *igstart; |
b954488b | 250 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
726f6388 JA |
251 | |
252 | /* Short-circuit if we can. */ | |
43cdcad8 | 253 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 JA |
254 | { |
255 | r = savestring (pmt); | |
256 | if (lp) | |
257 | *lp = strlen (r); | |
43cdcad8 CR |
258 | if (lip) |
259 | *lip = 0; | |
260 | if (niflp) | |
261 | *niflp = 0; | |
262 | if (vlp) | |
263 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
264 | return r; |
265 | } | |
266 | ||
ccc6cda3 | 267 | l = strlen (pmt); |
f73dda09 | 268 | r = ret = (char *)xmalloc (l + 1); |
28ef6c31 JA |
269 | |
270 | invfl = 0; /* invisible chars in first line of prompt */ | |
b954488b | 271 | invflset = 0; /* we only want to set invfl once */ |
28ef6c31 | 272 | |
dc8fbaf9 | 273 | igstart = 0; |
43cdcad8 | 274 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
726f6388 JA |
275 | { |
276 | /* This code strips the invisible character string markers | |
277 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
dc8fbaf9 | 278 | if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */ |
726f6388 | 279 | { |
5e4a95c7 CR |
280 | ignoring = 1; |
281 | igstart = p; | |
726f6388 JA |
282 | continue; |
283 | } | |
284 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
285 | { | |
286 | ignoring = 0; | |
dc8fbaf9 | 287 | if (p != (igstart + 1)) |
1569c106 | 288 | last = r - ret - 1; |
726f6388 JA |
289 | continue; |
290 | } | |
291 | else | |
292 | { | |
43cdcad8 CR |
293 | #if defined (HANDLE_MULTIBYTE) |
294 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
295 | { | |
296 | pind = p - pmt; | |
297 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
298 | l = ind - pind; | |
299 | while (l--) | |
300 | *r++ = *p++; | |
301 | if (!ignoring) | |
37c41ab1 CR |
302 | { |
303 | rl += ind - pind; | |
304 | physchars += _rl_col_width (pmt, pind, ind); | |
305 | } | |
43cdcad8 CR |
306 | else |
307 | ninvis += ind - pind; | |
308 | p--; /* compensate for later increment */ | |
309 | } | |
28ef6c31 | 310 | else |
43cdcad8 CR |
311 | #endif |
312 | { | |
313 | *r++ = *p; | |
314 | if (!ignoring) | |
37c41ab1 CR |
315 | { |
316 | rl++; /* visible length byte counter */ | |
317 | physchars++; | |
318 | } | |
43cdcad8 CR |
319 | else |
320 | ninvis++; /* invisible chars byte counter */ | |
321 | } | |
322 | ||
b954488b CR |
323 | if (invflset == 0 && rl >= _rl_screenwidth) |
324 | { | |
325 | invfl = ninvis; | |
326 | invflset = 1; | |
327 | } | |
726f6388 JA |
328 | } |
329 | } | |
330 | ||
28ef6c31 JA |
331 | if (rl < _rl_screenwidth) |
332 | invfl = ninvis; | |
333 | ||
726f6388 JA |
334 | *r = '\0'; |
335 | if (lp) | |
336 | *lp = rl; | |
ccc6cda3 JA |
337 | if (lip) |
338 | *lip = last; | |
28ef6c31 JA |
339 | if (niflp) |
340 | *niflp = invfl; | |
43cdcad8 CR |
341 | if (vlp) |
342 | *vlp = physchars; | |
726f6388 JA |
343 | return ret; |
344 | } | |
345 | ||
bb70624e JA |
346 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
347 | PMT and return the rest of PMT. */ | |
348 | char * | |
349 | _rl_strip_prompt (pmt) | |
350 | char *pmt; | |
351 | { | |
352 | char *ret; | |
353 | ||
43cdcad8 | 354 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
355 | return ret; |
356 | } | |
357 | ||
726f6388 JA |
358 | /* |
359 | * Expand the prompt string into the various display components, if | |
360 | * necessary. | |
361 | * | |
362 | * local_prompt = expanded last line of string in rl_display_prompt | |
363 | * (portion after the final newline) | |
364 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
365 | * expanded via expand_prompt | |
28ef6c31 JA |
366 | * prompt_visible_length = number of visible characters in local_prompt |
367 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
368 | * |
369 | * This function is called once per call to readline(). It may also be | |
370 | * called arbitrarily to expand the primary prompt. | |
371 | * | |
372 | * The return value is the number of visible characters on the last line | |
373 | * of the (possibly multi-line) prompt. | |
374 | */ | |
375 | int | |
376 | rl_expand_prompt (prompt) | |
377 | char *prompt; | |
378 | { | |
379 | char *p, *t; | |
380 | int c; | |
381 | ||
382 | /* Clear out any saved values. */ | |
28ef6c31 JA |
383 | FREE (local_prompt); |
384 | FREE (local_prompt_prefix); | |
385 | ||
726f6388 | 386 | local_prompt = local_prompt_prefix = (char *)0; |
0ad312a5 | 387 | local_prompt_len = 0; |
ec2199bd CR |
388 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
389 | prompt_visible_length = prompt_physical_chars = 0; | |
726f6388 | 390 | |
ccc6cda3 | 391 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
392 | return (0); |
393 | ||
394 | p = strrchr (prompt, '\n'); | |
395 | if (!p) | |
396 | { | |
28ef6c31 JA |
397 | /* The prompt is only one logical line, though it might wrap. */ |
398 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
399 | &prompt_last_invisible, | |
43cdcad8 CR |
400 | &prompt_invis_chars_first_line, |
401 | &prompt_physical_chars); | |
726f6388 | 402 | local_prompt_prefix = (char *)0; |
0ad312a5 | 403 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 404 | return (prompt_visible_length); |
726f6388 JA |
405 | } |
406 | else | |
407 | { | |
408 | /* The prompt spans multiple lines. */ | |
409 | t = ++p; | |
28ef6c31 JA |
410 | local_prompt = expand_prompt (p, &prompt_visible_length, |
411 | &prompt_last_invisible, | |
43cdcad8 | 412 | (int *)NULL, |
e6e3b444 | 413 | &prompt_physical_chars); |
726f6388 JA |
414 | c = *t; *t = '\0'; |
415 | /* The portion of the prompt string up to and including the | |
416 | final newline is now null-terminated. */ | |
28ef6c31 JA |
417 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
418 | (int *)NULL, | |
43cdcad8 | 419 | &prompt_invis_chars_first_line, |
e6e3b444 | 420 | (int *)NULL); |
726f6388 | 421 | *t = c; |
0ad312a5 | 422 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 423 | return (prompt_prefix_length); |
726f6388 JA |
424 | } |
425 | } | |
426 | ||
bb70624e JA |
427 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
428 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
429 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
430 | increased. If the lines have already been allocated, this ensures that | |
431 | they can hold at least MINSIZE characters. */ | |
432 | static void | |
433 | init_line_structures (minsize) | |
434 | int minsize; | |
435 | { | |
436 | register int n; | |
437 | ||
438 | if (invisible_line == 0) /* initialize it */ | |
439 | { | |
440 | if (line_size < minsize) | |
441 | line_size = minsize; | |
f73dda09 JA |
442 | visible_line = (char *)xmalloc (line_size); |
443 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
444 | } |
445 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
446 | { | |
447 | line_size *= 2; | |
448 | if (line_size < minsize) | |
449 | line_size = minsize; | |
f73dda09 JA |
450 | visible_line = (char *)xrealloc (visible_line, line_size); |
451 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
452 | } |
453 | ||
454 | for (n = minsize; n < line_size; n++) | |
455 | { | |
456 | visible_line[n] = 0; | |
457 | invisible_line[n] = 1; | |
458 | } | |
459 | ||
460 | if (vis_lbreaks == 0) | |
461 | { | |
462 | /* should be enough. */ | |
463 | inv_lbsize = vis_lbsize = 256; | |
464 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
465 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
7117c2d2 | 466 | #if defined (HANDLE_MULTIBYTE) |
906833f0 CR |
467 | line_state_visible->wbsize = vis_lbsize; |
468 | line_state_visible->wrapped_line = (int *)xmalloc (line_state_visible->wbsize * sizeof (int)); | |
469 | ||
470 | line_state_invisible->wbsize = inv_lbsize; | |
471 | line_state_invisible->wrapped_line = (int *)xmalloc (line_state_invisible->wbsize * sizeof (int)); | |
7117c2d2 | 472 | #endif |
bb70624e JA |
473 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
474 | } | |
475 | } | |
476 | ||
726f6388 JA |
477 | /* Basic redisplay algorithm. */ |
478 | void | |
479 | rl_redisplay () | |
480 | { | |
ccc6cda3 JA |
481 | register int in, out, c, linenum, cursor_linenum; |
482 | register char *line; | |
9697d2dc | 483 | int inv_botlin, lb_botlin, lb_linenum, o_cpos; |
37c41ab1 | 484 | int newlines, lpos, temp, modmark, n0, num; |
726f6388 | 485 | char *prompt_this_line; |
7117c2d2 JA |
486 | #if defined (HANDLE_MULTIBYTE) |
487 | wchar_t wc; | |
488 | size_t wc_bytes; | |
489 | int wc_width; | |
490 | mbstate_t ps; | |
491 | int _rl_wrapped_multicolumn = 0; | |
492 | #endif | |
726f6388 JA |
493 | |
494 | if (!readline_echoing_p) | |
495 | return; | |
496 | ||
497 | if (!rl_display_prompt) | |
498 | rl_display_prompt = ""; | |
499 | ||
055a1bf5 | 500 | if (invisible_line == 0 || vis_lbreaks == 0) |
726f6388 | 501 | { |
bb70624e | 502 | init_line_structures (0); |
726f6388 JA |
503 | rl_on_new_line (); |
504 | } | |
505 | ||
506 | /* Draw the line into the buffer. */ | |
9697d2dc | 507 | cpos_buffer_position = -1; |
726f6388 | 508 | |
ccc6cda3 JA |
509 | line = invisible_line; |
510 | out = inv_botlin = 0; | |
511 | ||
726f6388 JA |
512 | /* Mark the line as modified or not. We only do this for history |
513 | lines. */ | |
43cdcad8 | 514 | modmark = 0; |
726f6388 JA |
515 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
516 | { | |
517 | line[out++] = '*'; | |
518 | line[out] = '\0'; | |
43cdcad8 | 519 | modmark = 1; |
726f6388 JA |
520 | } |
521 | ||
522 | /* If someone thought that the redisplay was handled, but the currently | |
523 | visible line has a different modification state than the one about | |
524 | to become visible, then correct the caller's misconception. */ | |
525 | if (visible_line[0] != invisible_line[0]) | |
526 | rl_display_fixed = 0; | |
527 | ||
528 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
529 | one passed to readline()), use the values we have already expanded. | |
530 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
531 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 532 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 | 533 | { |
726f6388 JA |
534 | if (local_prompt_prefix && forced_display) |
535 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
536 | ||
0ad312a5 | 537 | if (local_prompt_len > 0) |
ccc6cda3 | 538 | { |
0ad312a5 | 539 | temp = local_prompt_len + out + 2; |
b72432fd JA |
540 | if (temp >= line_size) |
541 | { | |
542 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
543 | visible_line = (char *)xrealloc (visible_line, line_size); |
544 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 545 | } |
0ad312a5 CR |
546 | strncpy (line + out, local_prompt, local_prompt_len); |
547 | out += local_prompt_len; | |
ccc6cda3 | 548 | } |
726f6388 | 549 | line[out] = '\0'; |
0ad312a5 | 550 | wrap_offset = local_prompt_len - prompt_visible_length; |
726f6388 JA |
551 | } |
552 | else | |
553 | { | |
554 | int pmtlen; | |
555 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
556 | if (!prompt_this_line) | |
557 | prompt_this_line = rl_display_prompt; | |
558 | else | |
559 | { | |
560 | prompt_this_line++; | |
bb70624e | 561 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 562 | if (forced_display) |
ccc6cda3 | 563 | { |
bb70624e | 564 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
565 | /* Make sure we are at column zero even after a newline, |
566 | regardless of the state of terminal output processing. */ | |
bb70624e | 567 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
568 | cr (); |
569 | } | |
726f6388 JA |
570 | } |
571 | ||
762a763b | 572 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
573 | temp = pmtlen + out + 2; |
574 | if (temp >= line_size) | |
575 | { | |
576 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
577 | visible_line = (char *)xrealloc (visible_line, line_size); |
578 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 579 | } |
726f6388 JA |
580 | strncpy (line + out, prompt_this_line, pmtlen); |
581 | out += pmtlen; | |
582 | line[out] = '\0'; | |
28ef6c31 | 583 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
584 | } |
585 | ||
bb70624e JA |
586 | #define CHECK_INV_LBREAKS() \ |
587 | do { \ | |
588 | if (newlines >= (inv_lbsize - 2)) \ | |
589 | { \ | |
590 | inv_lbsize *= 2; \ | |
591 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
592 | } \ | |
593 | } while (0) | |
7117c2d2 JA |
594 | |
595 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
596 | #define CHECK_LPOS() \ |
597 | do { \ | |
b72432fd | 598 | lpos++; \ |
28ef6c31 | 599 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 600 | { \ |
bb70624e JA |
601 | if (newlines >= (inv_lbsize - 2)) \ |
602 | { \ | |
603 | inv_lbsize *= 2; \ | |
604 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
605 | } \ | |
b72432fd | 606 | inv_lbreaks[++newlines] = out; \ |
906833f0 CR |
607 | if (newlines >= (line_state_invisible->wbsize - 1)) \ |
608 | { \ | |
609 | line_state_invisible->wbsize *= 2; \ | |
610 | line_state_invisible->wrapped_line = (int *)xrealloc (line_state_invisible->wrapped_line, line_state_invisible->wbsize * sizeof(int)); \ | |
611 | } \ | |
612 | line_state_invisible->wrapped_line[newlines] = _rl_wrapped_multicolumn; \ | |
b72432fd JA |
613 | lpos = 0; \ |
614 | } \ | |
ccc6cda3 | 615 | } while (0) |
7117c2d2 JA |
616 | #else |
617 | #define CHECK_LPOS() \ | |
618 | do { \ | |
619 | lpos++; \ | |
620 | if (lpos >= _rl_screenwidth) \ | |
621 | { \ | |
622 | if (newlines >= (inv_lbsize - 2)) \ | |
623 | { \ | |
624 | inv_lbsize *= 2; \ | |
625 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
626 | } \ | |
627 | inv_lbreaks[++newlines] = out; \ | |
628 | lpos = 0; \ | |
629 | } \ | |
630 | } while (0) | |
631 | #endif | |
ccc6cda3 JA |
632 | |
633 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
634 | inv_lbreaks[newlines = 0] = 0; | |
43cdcad8 | 635 | #if 0 |
d166f048 | 636 | lpos = out - wrap_offset; |
43cdcad8 CR |
637 | #else |
638 | lpos = prompt_physical_chars + modmark; | |
639 | #endif | |
640 | ||
7117c2d2 | 641 | #if defined (HANDLE_MULTIBYTE) |
906833f0 | 642 | memset (line_state_invisible->wrapped_line, 0, line_state_invisible->wbsize * sizeof (int)); |
37c41ab1 | 643 | num = 0; |
7117c2d2 | 644 | #endif |
d166f048 | 645 | |
28ef6c31 JA |
646 | /* prompt_invis_chars_first_line is the number of invisible characters in |
647 | the first physical line of the prompt. | |
648 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
649 | chars on the second line. */ | |
650 | ||
651 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 652 | contents of the command line? */ |
28ef6c31 | 653 | while (lpos >= _rl_screenwidth) |
d166f048 | 654 | { |
4f67e6a5 | 655 | int z; |
28ef6c31 JA |
656 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
657 | invisible characters that is longer than the screen width. The | |
658 | prompt_invis_chars_first_line variable could be made into an array | |
659 | saying how many invisible characters there are per line, but that's | |
660 | probably too much work for the benefit gained. How many people have | |
545f34cf CR |
661 | prompts that exceed two physical lines? |
662 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
37c41ab1 | 663 | #if defined (HANDLE_MULTIBYTE) |
4f67e6a5 | 664 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
37c41ab1 | 665 | { |
4f67e6a5 CR |
666 | n0 = num; |
667 | temp = local_prompt_len; | |
668 | while (num < temp) | |
37c41ab1 | 669 | { |
4f67e6a5 CR |
670 | z = _rl_col_width (local_prompt, n0, num); |
671 | if (z > _rl_screenwidth) | |
672 | { | |
673 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
674 | break; | |
675 | } | |
676 | else if (z == _rl_screenwidth) | |
677 | break; | |
678 | num++; | |
37c41ab1 | 679 | } |
4f67e6a5 | 680 | temp = num; |
37c41ab1 | 681 | } |
4f67e6a5 | 682 | else |
37c41ab1 | 683 | #endif /* !HANDLE_MULTIBYTE */ |
4f67e6a5 CR |
684 | temp = ((newlines + 1) * _rl_screenwidth); |
685 | ||
686 | /* Now account for invisible characters in the current line. */ | |
2569d6d5 CR |
687 | /* XXX - this assumes that all of the invisible characters are before |
688 | the line wrap. */ | |
4f67e6a5 CR |
689 | temp += ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line |
690 | : ((newlines == 1) ? wrap_offset : 0)) | |
691 | : ((newlines == 0) ? wrap_offset :0)); | |
545f34cf | 692 | |
d166f048 | 693 | inv_lbreaks[++newlines] = temp; |
37c41ab1 | 694 | #if defined (HANDLE_MULTIBYTE) |
4f67e6a5 CR |
695 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
696 | lpos -= _rl_col_width (local_prompt, n0, num); | |
697 | else | |
37c41ab1 | 698 | #endif |
4f67e6a5 | 699 | lpos -= _rl_screenwidth; |
d166f048 | 700 | } |
ccc6cda3 | 701 | |
28ef6c31 JA |
702 | prompt_last_screen_line = newlines; |
703 | ||
704 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
9697d2dc | 705 | track of where the cursor is (cpos_buffer_position), the number of the line containing |
28ef6c31 JA |
706 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
707 | It maintains an array of line breaks for display (inv_lbreaks). | |
708 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 709 | lb_linenum = 0; |
7117c2d2 JA |
710 | #if defined (HANDLE_MULTIBYTE) |
711 | in = 0; | |
712 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
713 | { | |
714 | memset (&ps, 0, sizeof (mbstate_t)); | |
715 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
716 | } | |
717 | else | |
718 | wc_bytes = 1; | |
719 | while (in < rl_end) | |
720 | #else | |
d166f048 | 721 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 722 | #endif |
726f6388 JA |
723 | { |
724 | c = (unsigned char)rl_line_buffer[in]; | |
725 | ||
7117c2d2 JA |
726 | #if defined (HANDLE_MULTIBYTE) |
727 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
728 | { | |
d3a24ed2 | 729 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
730 | { |
731 | /* Byte sequence is invalid or shortened. Assume that the | |
732 | first byte represents a character. */ | |
733 | wc_bytes = 1; | |
734 | /* Assume that a character occupies a single column. */ | |
735 | wc_width = 1; | |
736 | memset (&ps, 0, sizeof (mbstate_t)); | |
737 | } | |
d3a24ed2 | 738 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
739 | break; /* Found '\0' */ |
740 | else | |
741 | { | |
742 | temp = wcwidth (wc); | |
d3a24ed2 | 743 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
744 | } |
745 | } | |
746 | #endif | |
747 | ||
726f6388 JA |
748 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
749 | { | |
750 | line_size *= 2; | |
f73dda09 JA |
751 | visible_line = (char *)xrealloc (visible_line, line_size); |
752 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
753 | line = invisible_line; |
754 | } | |
755 | ||
756 | if (in == rl_point) | |
ccc6cda3 | 757 | { |
9697d2dc | 758 | cpos_buffer_position = out; |
ccc6cda3 JA |
759 | lb_linenum = newlines; |
760 | } | |
726f6388 | 761 | |
7117c2d2 JA |
762 | #if defined (HANDLE_MULTIBYTE) |
763 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
764 | #else | |
726f6388 | 765 | if (META_CHAR (c)) |
7117c2d2 | 766 | #endif |
726f6388 JA |
767 | { |
768 | if (_rl_output_meta_chars == 0) | |
769 | { | |
770 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 771 | |
28ef6c31 | 772 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 773 | { |
28ef6c31 | 774 | temp = _rl_screenwidth - lpos; |
bb70624e | 775 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
776 | inv_lbreaks[++newlines] = out + temp; |
777 | lpos = 4 - temp; | |
778 | } | |
779 | else | |
780 | lpos += 4; | |
781 | ||
726f6388 JA |
782 | out += 4; |
783 | } | |
784 | else | |
ccc6cda3 JA |
785 | { |
786 | line[out++] = c; | |
787 | CHECK_LPOS(); | |
788 | } | |
726f6388 JA |
789 | } |
790 | #if defined (DISPLAY_TABS) | |
791 | else if (c == '\t') | |
792 | { | |
28ef6c31 | 793 | register int newout; |
b72432fd JA |
794 | |
795 | #if 0 | |
ccc6cda3 | 796 | newout = (out | (int)7) + 1; |
b72432fd JA |
797 | #else |
798 | newout = out + 8 - lpos % 8; | |
799 | #endif | |
ccc6cda3 | 800 | temp = newout - out; |
28ef6c31 | 801 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
802 | { |
803 | register int temp2; | |
28ef6c31 | 804 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 805 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
806 | inv_lbreaks[++newlines] = out + temp2; |
807 | lpos = temp - temp2; | |
808 | while (out < newout) | |
809 | line[out++] = ' '; | |
810 | } | |
811 | else | |
812 | { | |
813 | while (out < newout) | |
814 | line[out++] = ' '; | |
815 | lpos += temp; | |
816 | } | |
726f6388 JA |
817 | } |
818 | #endif | |
28ef6c31 | 819 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
820 | { |
821 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 822 | CHECK_INV_LBREAKS (); |
b72432fd JA |
823 | inv_lbreaks[++newlines] = out; |
824 | lpos = 0; | |
825 | } | |
ccc6cda3 | 826 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
827 | { |
828 | line[out++] = '^'; | |
ccc6cda3 JA |
829 | CHECK_LPOS(); |
830 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
831 | CHECK_LPOS(); | |
726f6388 | 832 | } |
ccc6cda3 | 833 | else |
726f6388 | 834 | { |
7117c2d2 JA |
835 | #if defined (HANDLE_MULTIBYTE) |
836 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
837 | { | |
838 | register int i; | |
839 | ||
840 | _rl_wrapped_multicolumn = 0; | |
841 | ||
842 | if (_rl_screenwidth < lpos + wc_width) | |
843 | for (i = lpos; i < _rl_screenwidth; i++) | |
844 | { | |
845 | /* The space will be removed in update_line() */ | |
846 | line[out++] = ' '; | |
847 | _rl_wrapped_multicolumn++; | |
848 | CHECK_LPOS(); | |
849 | } | |
850 | if (in == rl_point) | |
851 | { | |
9697d2dc | 852 | cpos_buffer_position = out; |
7117c2d2 JA |
853 | lb_linenum = newlines; |
854 | } | |
855 | for (i = in; i < in+wc_bytes; i++) | |
856 | line[out++] = rl_line_buffer[i]; | |
857 | for (i = 0; i < wc_width; i++) | |
858 | CHECK_LPOS(); | |
859 | } | |
860 | else | |
861 | { | |
862 | line[out++] = c; | |
863 | CHECK_LPOS(); | |
864 | } | |
865 | #else | |
ccc6cda3 JA |
866 | line[out++] = c; |
867 | CHECK_LPOS(); | |
7117c2d2 JA |
868 | #endif |
869 | } | |
870 | ||
871 | #if defined (HANDLE_MULTIBYTE) | |
872 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
873 | { | |
874 | in += wc_bytes; | |
875 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
726f6388 | 876 | } |
7117c2d2 JA |
877 | else |
878 | in++; | |
879 | #endif | |
880 | ||
726f6388 JA |
881 | } |
882 | line[out] = '\0'; | |
9697d2dc | 883 | if (cpos_buffer_position < 0) |
ccc6cda3 | 884 | { |
9697d2dc | 885 | cpos_buffer_position = out; |
ccc6cda3 JA |
886 | lb_linenum = newlines; |
887 | } | |
888 | ||
889 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 890 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
891 | inv_lbreaks[newlines+1] = out; |
892 | cursor_linenum = lb_linenum; | |
726f6388 | 893 | |
9697d2dc | 894 | /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed. |
28ef6c31 | 895 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
726f6388 JA |
896 | |
897 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
898 | line buffers are really multiple lines, which would wrap every | |
899 | (screenwidth - 1) characters. Go through each in turn, finding | |
900 | the changed region and updating it. The line order is top to bottom. */ | |
901 | ||
902 | /* If we can move the cursor up and down, then use multiple lines, | |
903 | otherwise, let long lines display in a single terminal line, and | |
904 | horizontally scroll it. */ | |
905 | ||
28ef6c31 | 906 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 907 | { |
28089d04 | 908 | int nleft, pos, changed_screen_line, tx; |
726f6388 JA |
909 | |
910 | if (!rl_display_fixed || forced_display) | |
911 | { | |
912 | forced_display = 0; | |
913 | ||
914 | /* If we have more than a screenful of material to display, then | |
915 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 916 | not the first. */ |
28ef6c31 | 917 | if (out >= _rl_screenchars) |
7117c2d2 JA |
918 | { |
919 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
920 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
921 | else | |
922 | out = _rl_screenchars - 1; | |
923 | } | |
726f6388 JA |
924 | |
925 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
926 | second and subsequent lines start at inv_lbreaks[N], offset by |
927 | OFFSET (which has already been calculated above). */ | |
726f6388 JA |
928 | |
929 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
ccc6cda3 JA |
930 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
931 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
932 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 933 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 934 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 JA |
935 | |
936 | /* For each line in the buffer, do the updating display. */ | |
937 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
938 | { | |
3969cd96 CR |
939 | /* This can lead us astray if we execute a program that changes |
940 | the locale from a non-multibyte to a multibyte one. */ | |
28089d04 | 941 | o_cpos = _rl_last_c_pos; |
5c26afb8 | 942 | cpos_adjusted = 0; |
726f6388 | 943 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
ccc6cda3 | 944 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 | 945 | |
28089d04 CR |
946 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
947 | take invisible characters into account, since _rl_last_c_pos | |
948 | is an absolute cursor position in a multibyte locale. See | |
949 | if compensating here is the right thing, or if we have to | |
5c26afb8 CR |
950 | change update_line itself. There is one case in which |
951 | update_line adjusts _rl_last_c_pos itself (so it can pass | |
952 | _rl_move_cursor_relative accurate values); it communicates | |
0ad312a5 CR |
953 | this back by setting cpos_adjusted. If we assume that |
954 | _rl_last_c_pos is correct (an absolute cursor position) each | |
955 | time update_line is called, then we can assume in our | |
956 | calculations that o_cpos does not need to be adjusted by | |
957 | wrap_offset. */ | |
28089d04 | 958 | if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
5c26afb8 | 959 | cpos_adjusted == 0 && |
28089d04 CR |
960 | _rl_last_c_pos != o_cpos && |
961 | _rl_last_c_pos > wrap_offset && | |
3969cd96 | 962 | o_cpos < prompt_last_invisible) |
28089d04 | 963 | _rl_last_c_pos -= wrap_offset; |
28089d04 | 964 | |
726f6388 JA |
965 | /* If this is the line with the prompt, we might need to |
966 | compensate for invisible characters in the new line. Do | |
967 | this only if there is not more than one new line (which | |
968 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
969 | and the new line is shorter than the old. Make sure we are |
970 | at the end of the new line before clearing. */ | |
726f6388 | 971 | if (linenum == 0 && |
ccc6cda3 | 972 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
973 | (wrap_offset > visible_wrap_offset) && |
974 | (_rl_last_c_pos < visible_first_line_len)) | |
975 | { | |
177d51f7 CR |
976 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
977 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
978 | else | |
979 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
726f6388 | 980 | if (nleft) |
d166f048 | 981 | _rl_clear_to_eol (nleft); |
726f6388 JA |
982 | } |
983 | ||
984 | /* Since the new first line is now visible, save its length. */ | |
985 | if (linenum == 0) | |
ccc6cda3 | 986 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
987 | } |
988 | ||
989 | /* We may have deleted some lines. If so, clear the left over | |
990 | blank ones at the bottom out. */ | |
991 | if (_rl_vis_botlin > inv_botlin) | |
992 | { | |
993 | char *tt; | |
994 | for (; linenum <= _rl_vis_botlin; linenum++) | |
995 | { | |
996 | tt = VIS_CHARS (linenum); | |
997 | _rl_move_vert (linenum); | |
998 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 999 | _rl_clear_to_eol |
28ef6c31 | 1000 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
1001 | } |
1002 | } | |
1003 | _rl_vis_botlin = inv_botlin; | |
1004 | ||
726f6388 JA |
1005 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
1006 | different screen line during this redisplay. */ | |
1007 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
1008 | if (changed_screen_line) | |
1009 | { | |
1010 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 1011 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
1012 | the physical cursor position on the screen stays the same, |
1013 | but the buffer position needs to be adjusted to account | |
1014 | for invisible characters. */ | |
6bf74e5a | 1015 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
b72432fd | 1016 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
1017 | } |
1018 | ||
1019 | /* We have to reprint the prompt if it contains invisible | |
1020 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
1021 | the characters from the current cursor position. But we |
1022 | only need to reprint it if the cursor is before the last | |
1023 | invisible character in the prompt string. */ | |
28ef6c31 | 1024 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1025 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
2abb7255 | 1026 | #if 0 |
ac18b312 | 1027 | _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt) |
2abb7255 CR |
1028 | #else |
1029 | _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt) | |
1030 | #endif | |
726f6388 | 1031 | { |
bb70624e JA |
1032 | #if defined (__MSDOS__) |
1033 | putc ('\r', rl_outstream); | |
1034 | #else | |
28ef6c31 JA |
1035 | if (_rl_term_cr) |
1036 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 1037 | #endif |
726f6388 | 1038 | _rl_output_some_chars (local_prompt, nleft); |
7117c2d2 | 1039 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
28089d04 | 1040 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft) - wrap_offset; |
7117c2d2 JA |
1041 | else |
1042 | _rl_last_c_pos = nleft; | |
726f6388 JA |
1043 | } |
1044 | ||
1045 | /* Where on that line? And where does that line start | |
1046 | in the buffer? */ | |
ccc6cda3 | 1047 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 | 1048 | /* nleft == number of characters in the line buffer between the |
8b35878f | 1049 | start of the line and the desired cursor position. */ |
9697d2dc | 1050 | nleft = cpos_buffer_position - pos; |
726f6388 | 1051 | |
6bf74e5a CR |
1052 | /* NLEFT is now a number of characters in a buffer. When in a |
1053 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
1054 | position that doesn't take invisible characters in the prompt | |
1055 | into account. We use a fudge factor to compensate. */ | |
6bf74e5a | 1056 | |
ccc6cda3 | 1057 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 1058 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 1059 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
1060 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
1061 | { | |
8b35878f | 1062 | /* TX == new physical cursor position in multibyte locale. */ |
7117c2d2 | 1063 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
28089d04 | 1064 | tx = _rl_col_width (&visible_line[pos], 0, nleft) - visible_wrap_offset; |
7117c2d2 | 1065 | else |
177d51f7 | 1066 | tx = nleft; |
28089d04 | 1067 | if (_rl_last_c_pos > tx) |
d11b8b46 | 1068 | { |
28089d04 | 1069 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ |
d11b8b46 CR |
1070 | _rl_last_c_pos = tx; |
1071 | } | |
726f6388 JA |
1072 | } |
1073 | ||
28089d04 CR |
1074 | /* We need to note that in a multibyte locale we are dealing with |
1075 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1076 | point specified by a buffer position (NLEFT) that doesn't take | |
1077 | invisible characters into account. */ | |
7117c2d2 JA |
1078 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1079 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
1080 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
1081 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1082 | } | |
1083 | } | |
1084 | else /* Do horizontal scrolling. */ | |
1085 | { | |
1086 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1087 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1088 | ||
1089 | /* Always at top line. */ | |
1090 | _rl_last_v_pos = 0; | |
1091 | ||
1092 | /* Compute where in the buffer the displayed line should start. This | |
1093 | will be LMARGIN. */ | |
1094 | ||
1095 | /* The number of characters that will be displayed before the cursor. */ | |
9697d2dc | 1096 | ndisp = cpos_buffer_position - wrap_offset; |
28ef6c31 | 1097 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1098 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 1099 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
9697d2dc | 1100 | phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 1101 | t = _rl_screenwidth / 3; |
726f6388 JA |
1102 | |
1103 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 1104 | last_lmargin will be > 0. */ |
726f6388 JA |
1105 | |
1106 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
1107 | width, compute the starting offset so that the cursor is about |
1108 | two-thirds of the way across the screen. */ | |
28ef6c31 | 1109 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 | 1110 | { |
9697d2dc | 1111 | lmargin = cpos_buffer_position - (2 * t); |
726f6388 JA |
1112 | if (lmargin < 0) |
1113 | lmargin = 0; | |
1114 | /* If the left margin would be in the middle of a prompt with | |
1115 | invisible characters, don't display the prompt at all. */ | |
1116 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1117 | lmargin = nleft; | |
1118 | } | |
28ef6c31 | 1119 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1120 | lmargin = 0; |
726f6388 JA |
1121 | else if (phys_c_pos < 1) |
1122 | { | |
1123 | /* If we are moving back towards the beginning of the line and | |
1124 | the last margin is no longer correct, compute a new one. */ | |
9697d2dc | 1125 | lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */ |
726f6388 JA |
1126 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
1127 | lmargin = nleft; | |
1128 | } | |
1129 | else | |
b72432fd | 1130 | lmargin = last_lmargin; |
726f6388 JA |
1131 | |
1132 | /* If the first character on the screen isn't the first character | |
1133 | in the display line, indicate this with a special character. */ | |
1134 | if (lmargin > 0) | |
1135 | line[lmargin] = '<'; | |
1136 | ||
1137 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1138 | the whole line, indicate that with a special character at the |
1139 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1140 | wrap offset into account. */ | |
28ef6c31 | 1141 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1142 | if (t < out) |
b72432fd | 1143 | line[t - 1] = '>'; |
726f6388 JA |
1144 | |
1145 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
1146 | { | |
1147 | forced_display = 0; | |
1148 | update_line (&visible_line[last_lmargin], | |
1149 | &invisible_line[lmargin], | |
1150 | 0, | |
28ef6c31 JA |
1151 | _rl_screenwidth + visible_wrap_offset, |
1152 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1153 | 0); |
1154 | ||
1155 | /* If the visible new line is shorter than the old, but the number | |
1156 | of invisible characters is greater, and we are at the end of | |
1157 | the new line, we need to clear to eol. */ | |
1158 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1159 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1160 | (_rl_last_c_pos == out) && | |
1161 | t < visible_first_line_len) | |
1162 | { | |
28ef6c31 | 1163 | nleft = _rl_screenwidth - t; |
d166f048 | 1164 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1165 | } |
1166 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1167 | if (visible_first_line_len > _rl_screenwidth) |
1168 | visible_first_line_len = _rl_screenwidth; | |
726f6388 | 1169 | |
9697d2dc | 1170 | _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]); |
726f6388 JA |
1171 | last_lmargin = lmargin; |
1172 | } | |
1173 | } | |
1174 | fflush (rl_outstream); | |
1175 | ||
1176 | /* Swap visible and non-visible lines. */ | |
1177 | { | |
906833f0 | 1178 | struct line_state *vtemp = line_state_visible; |
bb70624e | 1179 | |
906833f0 CR |
1180 | line_state_visible = line_state_invisible; |
1181 | line_state_invisible = vtemp; | |
bb70624e | 1182 | |
726f6388 JA |
1183 | rl_display_fixed = 0; |
1184 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1185 | are not displaying any invisible characters, so set visible_wrap_offset | |
1186 | to 0. */ | |
1187 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1188 | visible_wrap_offset = 0; | |
1189 | else | |
1190 | visible_wrap_offset = wrap_offset; | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | /* PWP: update_line() is based on finding the middle difference of each | |
1195 | line on the screen; vis: | |
1196 | ||
1197 | /old first difference | |
1198 | /beginning of line | /old last same /old EOL | |
1199 | v v v v | |
1200 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1201 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1202 | ^ ^ ^ ^ | |
1203 | \beginning of line | \new last same \new end of line | |
1204 | \new first difference | |
1205 | ||
1206 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1207 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1208 | |
1209 | Could be made even smarter, but this works well enough */ | |
1210 | static void | |
1211 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1212 | register char *old, *new; | |
ccc6cda3 | 1213 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1214 | { |
1215 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
906833f0 | 1216 | int temp, lendiff, wsatend, od, nd, twidth; |
ccc6cda3 | 1217 | int current_invis_chars; |
7117c2d2 JA |
1218 | int col_lendiff, col_temp; |
1219 | #if defined (HANDLE_MULTIBYTE) | |
1220 | mbstate_t ps_new, ps_old; | |
dc8fbaf9 | 1221 | int new_offset, old_offset; |
7117c2d2 | 1222 | #endif |
726f6388 JA |
1223 | |
1224 | /* If we're at the right edge of a terminal that supports xn, we're | |
1225 | ready to wrap around, so do so. This fixes problems with knowing | |
1226 | the exact cursor position and cut-and-paste with certain terminal | |
1227 | emulators. In this calculation, TEMP is the physical screen | |
1228 | position of the cursor. */ | |
177d51f7 CR |
1229 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1230 | temp = _rl_last_c_pos; | |
1231 | else | |
1232 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
28ef6c31 | 1233 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1234 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1235 | { |
7117c2d2 JA |
1236 | #if defined (HANDLE_MULTIBYTE) |
1237 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1238 | { | |
1239 | wchar_t wc; | |
1240 | mbstate_t ps; | |
1241 | int tempwidth, bytes; | |
1242 | size_t ret; | |
1243 | ||
1244 | /* This fixes only double-column characters, but if the wrapped | |
1245 | character comsumes more than three columns, spaces will be | |
1246 | inserted in the string buffer. */ | |
906833f0 CR |
1247 | if (current_line < line_state_visible->wbsize && line_state_visible->wrapped_line[current_line] > 0) |
1248 | _rl_clear_to_eol (line_state_visible->wrapped_line[current_line]); | |
7117c2d2 JA |
1249 | |
1250 | memset (&ps, 0, sizeof (mbstate_t)); | |
1251 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
d3a24ed2 | 1252 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1253 | { |
1254 | tempwidth = 1; | |
1255 | ret = 1; | |
1256 | } | |
d3a24ed2 | 1257 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1258 | tempwidth = 0; |
1259 | else | |
1260 | tempwidth = wcwidth (wc); | |
1261 | ||
1262 | if (tempwidth > 0) | |
1263 | { | |
1264 | int count; | |
1265 | bytes = ret; | |
1266 | for (count = 0; count < bytes; count++) | |
1267 | putc (new[count], rl_outstream); | |
1268 | _rl_last_c_pos = tempwidth; | |
1269 | _rl_last_v_pos++; | |
1270 | memset (&ps, 0, sizeof (mbstate_t)); | |
1271 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1272 | if (ret != 0 && bytes != 0) | |
1273 | { | |
d3a24ed2 | 1274 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1275 | memmove (old+bytes, old+1, strlen (old+1)); |
1276 | else | |
1277 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1278 | memcpy (old, new, bytes); | |
1279 | } | |
1280 | } | |
1281 | else | |
1282 | { | |
1283 | putc (' ', rl_outstream); | |
1284 | _rl_last_c_pos = 1; | |
1285 | _rl_last_v_pos++; | |
1286 | if (old[0] && new[0]) | |
1287 | old[0] = new[0]; | |
1288 | } | |
1289 | } | |
726f6388 | 1290 | else |
7117c2d2 JA |
1291 | #endif |
1292 | { | |
1293 | if (new[0]) | |
1294 | putc (new[0], rl_outstream); | |
1295 | else | |
1296 | putc (' ', rl_outstream); | |
5c26afb8 | 1297 | _rl_last_c_pos = 1; |
7117c2d2 JA |
1298 | _rl_last_v_pos++; |
1299 | if (old[0] && new[0]) | |
1300 | old[0] = new[0]; | |
1301 | } | |
726f6388 | 1302 | } |
7117c2d2 | 1303 | |
726f6388 JA |
1304 | |
1305 | /* Find first difference. */ | |
7117c2d2 JA |
1306 | #if defined (HANDLE_MULTIBYTE) |
1307 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1308 | { | |
5e13499c CR |
1309 | /* See if the old line is a subset of the new line, so that the |
1310 | only change is adding characters. */ | |
1311 | temp = (omax < nmax) ? omax : nmax; | |
1312 | if (memcmp (old, new, temp) == 0) | |
7117c2d2 | 1313 | { |
5e13499c CR |
1314 | ofd = old + temp; |
1315 | nfd = new + temp; | |
d3a24ed2 CR |
1316 | } |
1317 | else | |
5e13499c CR |
1318 | { |
1319 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1320 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1321 | ||
1322 | if (omax == nmax && STREQN (new, old, omax)) | |
d3a24ed2 | 1323 | { |
5e13499c CR |
1324 | ofd = old + omax; |
1325 | nfd = new + nmax; | |
1326 | } | |
1327 | else | |
1328 | { | |
1329 | new_offset = old_offset = 0; | |
1330 | for (ofd = old, nfd = new; | |
1331 | (ofd - old < omax) && *ofd && | |
1332 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1333 | { | |
1334 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1335 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1336 | ofd = old + old_offset; | |
1337 | nfd = new + new_offset; | |
1338 | } | |
d3a24ed2 | 1339 | } |
7117c2d2 JA |
1340 | } |
1341 | } | |
1342 | else | |
1343 | #endif | |
726f6388 JA |
1344 | for (ofd = old, nfd = new; |
1345 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1346 | ofd++, nfd++) | |
1347 | ; | |
1348 | ||
1349 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1350 | of the distance between ne and new and oe and old, respectively, to | |
1351 | move a subtraction out of each loop. */ | |
1352 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1353 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1354 | ||
1355 | /* If no difference, continue to next line. */ | |
1356 | if (ofd == oe && nfd == ne) | |
1357 | return; | |
1358 | ||
1359 | wsatend = 1; /* flag for trailing whitespace */ | |
7117c2d2 JA |
1360 | |
1361 | #if defined (HANDLE_MULTIBYTE) | |
1362 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1363 | { | |
1364 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1365 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1366 | while ((ols > ofd) && (nls > nfd)) | |
1367 | { | |
1368 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1369 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1370 | ||
d3a24ed2 CR |
1371 | #if 0 |
1372 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1373 | _rl_adjust_point (old, ols - old, &ps_old); |
1374 | _rl_adjust_point (new, nls - new, &ps_new); | |
d3a24ed2 | 1375 | #endif |
7117c2d2 JA |
1376 | |
1377 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1378 | break; | |
1379 | ||
1380 | if (*ols == ' ') | |
1381 | wsatend = 0; | |
1382 | ||
1383 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1384 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1385 | } | |
1386 | } | |
1387 | else | |
1388 | { | |
1389 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1390 | ols = oe - 1; /* find last same */ |
1391 | nls = ne - 1; | |
1392 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1393 | { | |
1394 | if (*ols != ' ') | |
1395 | wsatend = 0; | |
1396 | ols--; | |
1397 | nls--; | |
1398 | } | |
7117c2d2 JA |
1399 | #if defined (HANDLE_MULTIBYTE) |
1400 | } | |
1401 | #endif | |
726f6388 JA |
1402 | |
1403 | if (wsatend) | |
1404 | { | |
1405 | ols = oe; | |
1406 | nls = ne; | |
1407 | } | |
7117c2d2 JA |
1408 | #if defined (HANDLE_MULTIBYTE) |
1409 | /* This may not work for stateful encoding, but who cares? To handle | |
1410 | stateful encoding properly, we have to scan each string from the | |
1411 | beginning and compare. */ | |
1412 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1413 | #else | |
726f6388 | 1414 | else if (*ols != *nls) |
7117c2d2 | 1415 | #endif |
726f6388 JA |
1416 | { |
1417 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 JA |
1418 | { |
1419 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1420 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1421 | else | |
1422 | ols++; | |
1423 | } | |
726f6388 | 1424 | if (*nls) |
7117c2d2 JA |
1425 | { |
1426 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1427 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1428 | else | |
1429 | nls++; | |
1430 | } | |
726f6388 JA |
1431 | } |
1432 | ||
ccc6cda3 JA |
1433 | /* count of invisible characters in the current invisible line. */ |
1434 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1435 | if (_rl_last_v_pos != current_line) | |
1436 | { | |
1437 | _rl_move_vert (current_line); | |
177d51f7 | 1438 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
ccc6cda3 JA |
1439 | _rl_last_c_pos += visible_wrap_offset; |
1440 | } | |
726f6388 JA |
1441 | |
1442 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1443 | prompt string, and the prompt string has not changed, and the current |
1444 | cursor position is before the last invisible character in the prompt, | |
1445 | and the index of the character to move to is past the end of the prompt | |
1446 | string, then redraw the entire prompt string. We can only do this | |
1447 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1448 | |
ccc6cda3 JA |
1449 | This is not an efficiency hack -- there is a problem with redrawing |
1450 | portions of the prompt string if they contain terminal escape | |
1451 | sequences (like drawing the `unbold' sequence without a corresponding | |
1452 | `bold') that manifests itself on certain terminals. */ | |
726f6388 | 1453 | |
0ad312a5 | 1454 | lendiff = local_prompt_len; |
ccc6cda3 | 1455 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 1456 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 | 1457 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
3969cd96 | 1458 | od >= lendiff && _rl_last_c_pos < PROMPT_ENDING_INDEX) |
726f6388 | 1459 | { |
bb70624e JA |
1460 | #if defined (__MSDOS__) |
1461 | putc ('\r', rl_outstream); | |
1462 | #else | |
28ef6c31 | 1463 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1464 | #endif |
726f6388 | 1465 | _rl_output_some_chars (local_prompt, lendiff); |
7117c2d2 | 1466 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5c26afb8 CR |
1467 | { |
1468 | /* We take wrap_offset into account here so we can pass correct | |
1469 | information to _rl_move_cursor_relative. */ | |
1470 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff) - wrap_offset; | |
1471 | cpos_adjusted = 1; | |
1472 | } | |
7117c2d2 JA |
1473 | else |
1474 | _rl_last_c_pos = lendiff; | |
726f6388 JA |
1475 | } |
1476 | ||
0ad312a5 CR |
1477 | /* When this function returns, _rl_last_c_pos is correct, and an absolute |
1478 | cursor postion in multibyte mode, but a buffer index when not in a | |
1479 | multibyte locale. */ | |
ccc6cda3 | 1480 | _rl_move_cursor_relative (od, old); |
0ad312a5 CR |
1481 | #if 1 |
1482 | #if defined (HANDLE_MULTIBYTE) | |
1483 | /* We need to indicate that the cursor position is correct in the presence of | |
1484 | invisible characters in the prompt string. Let's see if setting this when | |
1485 | we make sure we're at the end of the drawn prompt string works. */ | |
1486 | if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 && _rl_last_c_pos == prompt_physical_chars) | |
1487 | cpos_adjusted = 1; | |
1488 | #endif | |
1489 | #endif | |
726f6388 | 1490 | |
7117c2d2 JA |
1491 | /* if (len (new) > len (old)) |
1492 | lendiff == difference in buffer | |
1493 | col_lendiff == difference on screen | |
1494 | When not using multibyte characters, these are equal */ | |
726f6388 | 1495 | lendiff = (nls - nfd) - (ols - ofd); |
7117c2d2 JA |
1496 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1497 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1498 | else | |
1499 | col_lendiff = lendiff; | |
726f6388 | 1500 | |
ccc6cda3 JA |
1501 | /* If we are changing the number of invisible characters in a line, and |
1502 | the spot of first difference is before the end of the invisible chars, | |
1503 | lendiff needs to be adjusted. */ | |
1504 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1505 | current_invis_chars != visible_wrap_offset) | |
7117c2d2 JA |
1506 | { |
1507 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1508 | { | |
1509 | lendiff += visible_wrap_offset - current_invis_chars; | |
1510 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1511 | } | |
1512 | else | |
1513 | { | |
1514 | lendiff += visible_wrap_offset - current_invis_chars; | |
1515 | col_lendiff = lendiff; | |
1516 | } | |
1517 | } | |
ccc6cda3 | 1518 | |
726f6388 JA |
1519 | /* Insert (diff (len (old), len (new)) ch. */ |
1520 | temp = ne - nfd; | |
7117c2d2 JA |
1521 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1522 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1523 | else | |
1524 | col_temp = temp; | |
1525 | ||
1526 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
726f6388 JA |
1527 | { |
1528 | /* Non-zero if we're increasing the number of lines. */ | |
1529 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1530 | /* Sometimes it is cheaper to print the characters rather than | |
1531 | use the terminal's capabilities. If we're growing the number | |
1532 | of lines, make sure we actually cause the new line to wrap | |
1533 | around on auto-wrapping terminals. */ | |
7117c2d2 | 1534 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1535 | { |
28ef6c31 | 1536 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1537 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1538 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 JA |
1539 | invisible characters. We need to just draw them. */ |
1540 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
28ef6c31 | 1541 | lendiff <= prompt_visible_length || !current_invis_chars)) |
726f6388 | 1542 | { |
7117c2d2 JA |
1543 | insert_some_chars (nfd, lendiff, col_lendiff); |
1544 | _rl_last_c_pos += col_lendiff; | |
726f6388 | 1545 | } |
d90269dd | 1546 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
726f6388 JA |
1547 | { |
1548 | /* At the end of a line the characters do not have to | |
1549 | be "inserted". They can just be placed on the screen. */ | |
ccc6cda3 | 1550 | /* However, this screws up the rest of this block, which |
b72432fd | 1551 | assumes you've done the insert because you can. */ |
726f6388 | 1552 | _rl_output_some_chars (nfd, lendiff); |
7117c2d2 | 1553 | _rl_last_c_pos += col_lendiff; |
726f6388 | 1554 | } |
ccc6cda3 JA |
1555 | else |
1556 | { | |
1557 | /* We have horizontal scrolling and we are not inserting at | |
1558 | the end. We have invisible characters in this line. This | |
1559 | is a dumb update. */ | |
1560 | _rl_output_some_chars (nfd, temp); | |
5c26afb8 | 1561 | _rl_last_c_pos += col_temp; |
ccc6cda3 JA |
1562 | return; |
1563 | } | |
726f6388 JA |
1564 | /* Copy (new) chars to screen from first diff to last match. */ |
1565 | temp = nls - nfd; | |
1566 | if ((temp - lendiff) > 0) | |
1567 | { | |
1568 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
5e13499c CR |
1569 | /* XXX -- this bears closer inspection. Fixes a redisplay bug |
1570 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1571 | multibyte characters and prompt strings with invisible | |
1572 | characters, but was previously disabled. */ | |
906833f0 CR |
1573 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1574 | twidth = _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); | |
1575 | else | |
1576 | twidth = temp - lendiff; | |
1577 | _rl_last_c_pos += twidth; | |
726f6388 JA |
1578 | } |
1579 | } | |
1580 | else | |
1581 | { | |
1582 | /* cannot insert chars, write to EOL */ | |
1583 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1584 | _rl_last_c_pos += col_temp; |
5c26afb8 CR |
1585 | /* If we're in a multibyte locale and were before the last invisible |
1586 | char in the current line (which implies we just output some invisible | |
28089d04 CR |
1587 | characters) we need to adjust _rl_last_c_pos, since it represents |
1588 | a physical character position. */ | |
726f6388 JA |
1589 | } |
1590 | } | |
1591 | else /* Delete characters from line. */ | |
1592 | { | |
1593 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1594 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1595 | { |
1596 | /* If all we're doing is erasing the invisible characters in the | |
1597 | prompt string, don't bother. It screws up the assumptions | |
1598 | about what's on the screen. */ | |
1599 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1600 | -lendiff == visible_wrap_offset) | |
7117c2d2 | 1601 | col_lendiff = 0; |
726f6388 | 1602 | |
7117c2d2 JA |
1603 | if (col_lendiff) |
1604 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 JA |
1605 | |
1606 | /* Copy (new) chars to screen from first diff to last match */ | |
1607 | temp = nls - nfd; | |
1608 | if (temp > 0) | |
1609 | { | |
1610 | _rl_output_some_chars (nfd, temp); | |
906833f0 CR |
1611 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1612 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp); | |
1613 | else | |
1614 | _rl_last_c_pos += temp; | |
726f6388 JA |
1615 | } |
1616 | } | |
1617 | /* Otherwise, print over the existing material. */ | |
1618 | else | |
1619 | { | |
1620 | if (temp > 0) | |
1621 | { | |
1622 | _rl_output_some_chars (nfd, temp); | |
28089d04 | 1623 | _rl_last_c_pos += col_temp; /* XXX */ |
726f6388 JA |
1624 | } |
1625 | lendiff = (oe - old) - (ne - new); | |
7117c2d2 JA |
1626 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1627 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1628 | else | |
1629 | col_lendiff = lendiff; | |
1630 | ||
1631 | if (col_lendiff) | |
b72432fd JA |
1632 | { |
1633 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 1634 | space_to_eol (col_lendiff); |
b72432fd | 1635 | else |
7117c2d2 | 1636 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 1637 | } |
726f6388 JA |
1638 | } |
1639 | } | |
1640 | } | |
1641 | ||
1642 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1643 | int |
726f6388 JA |
1644 | rl_on_new_line () |
1645 | { | |
1646 | if (visible_line) | |
1647 | visible_line[0] = '\0'; | |
1648 | ||
1649 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1650 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1651 | if (vis_lbreaks) |
1652 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1653 | visible_wrap_offset = 0; | |
726f6388 JA |
1654 | return 0; |
1655 | } | |
1656 | ||
bb70624e JA |
1657 | /* Tell the update routines that we have moved onto a new line with the |
1658 | prompt already displayed. Code originally from the version of readline | |
61deeb13 CR |
1659 | distributed with CLISP. rl_expand_prompt must have already been called |
1660 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
1661 | int |
1662 | rl_on_new_line_with_prompt () | |
1663 | { | |
1664 | int prompt_size, i, l, real_screenwidth, newlines; | |
61deeb13 | 1665 | char *prompt_last_line, *lprompt; |
bb70624e JA |
1666 | |
1667 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1668 | the already-displayed prompt. */ | |
1669 | prompt_size = strlen (rl_prompt) + 1; | |
1670 | init_line_structures (prompt_size); | |
1671 | ||
1672 | /* Make sure the line structures hold the already-displayed prompt for | |
1673 | redisplay. */ | |
61deeb13 CR |
1674 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1675 | strcpy (visible_line, lprompt); | |
1676 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
1677 | |
1678 | /* If the prompt contains newlines, take the last tail. */ | |
1679 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1680 | if (!prompt_last_line) | |
1681 | prompt_last_line = rl_prompt; | |
1682 | ||
1683 | l = strlen (prompt_last_line); | |
7117c2d2 | 1684 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
28089d04 | 1685 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); /* XXX */ |
7117c2d2 JA |
1686 | else |
1687 | _rl_last_c_pos = l; | |
bb70624e JA |
1688 | |
1689 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1690 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1691 | one less, see terminal.c. */ | |
28ef6c31 | 1692 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1693 | _rl_last_v_pos = l / real_screenwidth; |
1694 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1695 | whether the cursor is at the end of the last line, or already at the | |
1696 | beginning of the next line. Output a newline just to be safe. */ | |
1697 | if (l > 0 && (l % real_screenwidth) == 0) | |
1698 | _rl_output_some_chars ("\n", 1); | |
1699 | last_lmargin = 0; | |
1700 | ||
1701 | newlines = 0; i = 0; | |
1702 | while (i <= l) | |
1703 | { | |
1704 | _rl_vis_botlin = newlines; | |
1705 | vis_lbreaks[newlines++] = i; | |
1706 | i += real_screenwidth; | |
1707 | } | |
1708 | vis_lbreaks[newlines] = l; | |
1709 | visible_wrap_offset = 0; | |
1710 | ||
61deeb13 CR |
1711 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1712 | ||
bb70624e JA |
1713 | return 0; |
1714 | } | |
1715 | ||
726f6388 | 1716 | /* Actually update the display, period. */ |
ccc6cda3 | 1717 | int |
726f6388 JA |
1718 | rl_forced_update_display () |
1719 | { | |
0cc62c12 CR |
1720 | register char *temp; |
1721 | ||
726f6388 JA |
1722 | if (visible_line) |
1723 | { | |
0cc62c12 | 1724 | temp = visible_line; |
ccc6cda3 | 1725 | while (*temp) |
b72432fd | 1726 | *temp++ = '\0'; |
726f6388 JA |
1727 | } |
1728 | rl_on_new_line (); | |
1729 | forced_display++; | |
ccc6cda3 | 1730 | (*rl_redisplay_function) (); |
726f6388 JA |
1731 | return 0; |
1732 | } | |
1733 | ||
1734 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
28089d04 CR |
1735 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
1736 | buffer index.) | |
726f6388 JA |
1737 | DATA is the contents of the screen line of interest; i.e., where |
1738 | the movement is being done. */ | |
1739 | void | |
1740 | _rl_move_cursor_relative (new, data) | |
1741 | int new; | |
28ef6c31 | 1742 | const char *data; |
726f6388 JA |
1743 | { |
1744 | register int i; | |
28089d04 CR |
1745 | int woff; /* number of invisible chars on current line */ |
1746 | int cpos, dpos; /* current and desired cursor positions */ | |
726f6388 | 1747 | |
28089d04 CR |
1748 | woff = W_OFFSET (_rl_last_v_pos, wrap_offset); |
1749 | cpos = _rl_last_c_pos; | |
7117c2d2 JA |
1750 | #if defined (HANDLE_MULTIBYTE) |
1751 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1752 | a multibyte string, but _rl_last_c_pos is the display position. In | |
d3a24ed2 | 1753 | this case, NEW's display position is not obvious and must be |
28089d04 CR |
1754 | calculated. We need to account for invisible characters in this line, |
1755 | as long as we are past them and they are counted by _rl_col_width. */ | |
1756 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
d3a24ed2 | 1757 | { |
28089d04 | 1758 | dpos = _rl_col_width (data, 0, new); |
9697d2dc | 1759 | if (dpos > prompt_last_invisible) /* XXX - don't use woff here */ |
e7f1978a CR |
1760 | { |
1761 | dpos -= woff; | |
1762 | /* Since this will be assigned to _rl_last_c_pos at the end (more | |
1763 | precisely, _rl_last_c_pos == dpos when this function returns), | |
1764 | let the caller know. */ | |
1765 | cpos_adjusted = 1; | |
1766 | } | |
d3a24ed2 | 1767 | } |
28089d04 | 1768 | else |
7117c2d2 | 1769 | #endif |
28089d04 CR |
1770 | dpos = new; |
1771 | ||
1772 | /* If we don't have to do anything, then return. */ | |
1773 | if (cpos == dpos) | |
1774 | return; | |
726f6388 JA |
1775 | |
1776 | /* It may be faster to output a CR, and then move forwards instead | |
1777 | of moving backwards. */ | |
1778 | /* i == current physical cursor position. */ | |
28089d04 CR |
1779 | #if defined (HANDLE_MULTIBYTE) |
1780 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1781 | i = _rl_last_c_pos; | |
1782 | else | |
1783 | #endif | |
1784 | i = _rl_last_c_pos - woff; | |
9697d2dc | 1785 | if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) || |
28ef6c31 | 1786 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
1787 | { |
1788 | #if defined (__MSDOS__) | |
1789 | putc ('\r', rl_outstream); | |
1790 | #else | |
28ef6c31 | 1791 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 | 1792 | #endif /* !__MSDOS__ */ |
28089d04 | 1793 | cpos = _rl_last_c_pos = 0; |
726f6388 JA |
1794 | } |
1795 | ||
28089d04 | 1796 | if (cpos < dpos) |
726f6388 JA |
1797 | { |
1798 | /* Move the cursor forward. We do it by printing the command | |
1799 | to move the cursor forward if there is one, else print that | |
1800 | portion of the output buffer again. Which is cheaper? */ | |
1801 | ||
1802 | /* The above comment is left here for posterity. It is faster | |
1803 | to print one character (non-control) than to print a control | |
1804 | sequence telling the terminal to move forward one character. | |
1805 | That kind of control is for people who don't know what the | |
1806 | data is underneath the cursor. */ | |
9697d2dc CR |
1807 | |
1808 | /* However, we need a handle on where the current display position is | |
1809 | in the buffer for the immediately preceding comment to be true. | |
1810 | In multibyte locales, we don't currently have that info available. | |
1811 | Without it, we don't know where the data we have to display begins | |
1812 | in the buffer and we have to go back to the beginning of the screen | |
1813 | line. In this case, we can use the terminal sequence to move forward | |
1814 | if it's available. */ | |
7117c2d2 JA |
1815 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1816 | { | |
9697d2dc CR |
1817 | if (_rl_term_forward_char) |
1818 | { | |
1819 | for (i = cpos; i < dpos; i++) | |
1820 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1821 | } | |
1822 | else | |
1823 | { | |
1824 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1825 | for (i = 0; i < new; i++) | |
1826 | putc (data[i], rl_outstream); | |
1827 | } | |
7117c2d2 | 1828 | } |
726f6388 | 1829 | else |
28089d04 | 1830 | for (i = cpos; i < new; i++) |
726f6388 | 1831 | putc (data[i], rl_outstream); |
726f6388 | 1832 | } |
28089d04 | 1833 | |
7117c2d2 JA |
1834 | #if defined (HANDLE_MULTIBYTE) |
1835 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1836 | The byte length of the string is probably bigger than the column width | |
1837 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1838 | display point is less than _rl_last_c_pos. */ | |
7117c2d2 | 1839 | #endif |
28089d04 CR |
1840 | else if (cpos > dpos) |
1841 | _rl_backspace (cpos - dpos); | |
7117c2d2 | 1842 | |
28089d04 | 1843 | _rl_last_c_pos = dpos; |
726f6388 JA |
1844 | } |
1845 | ||
1846 | /* PWP: move the cursor up or down. */ | |
1847 | void | |
1848 | _rl_move_vert (to) | |
1849 | int to; | |
1850 | { | |
1851 | register int delta, i; | |
1852 | ||
28ef6c31 | 1853 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
1854 | return; |
1855 | ||
726f6388 JA |
1856 | if ((delta = to - _rl_last_v_pos) > 0) |
1857 | { | |
1858 | for (i = 0; i < delta; i++) | |
1859 | putc ('\n', rl_outstream); | |
bb70624e JA |
1860 | #if defined (__MSDOS__) |
1861 | putc ('\r', rl_outstream); | |
1862 | #else | |
28ef6c31 | 1863 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1864 | #endif |
726f6388 JA |
1865 | _rl_last_c_pos = 0; |
1866 | } | |
1867 | else | |
1868 | { /* delta < 0 */ | |
28ef6c31 | 1869 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 1870 | for (i = 0; i < -delta; i++) |
28ef6c31 | 1871 | tputs (_rl_term_up, 1, _rl_output_character_function); |
726f6388 | 1872 | } |
bb70624e | 1873 | |
726f6388 JA |
1874 | _rl_last_v_pos = to; /* Now TO is here */ |
1875 | } | |
1876 | ||
1877 | /* Physically print C on rl_outstream. This is for functions which know | |
1878 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 1879 | int |
726f6388 JA |
1880 | rl_show_char (c) |
1881 | int c; | |
1882 | { | |
1883 | int n = 1; | |
1884 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1885 | { | |
1886 | fprintf (rl_outstream, "M-"); | |
1887 | n += 2; | |
1888 | c = UNMETA (c); | |
1889 | } | |
1890 | ||
1891 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 1892 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 1893 | #else |
ccc6cda3 | 1894 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
1895 | #endif /* !DISPLAY_TABS */ |
1896 | { | |
1897 | fprintf (rl_outstream, "C-"); | |
1898 | n += 2; | |
ccc6cda3 | 1899 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
1900 | } |
1901 | ||
1902 | putc (c, rl_outstream); | |
1903 | fflush (rl_outstream); | |
1904 | return n; | |
1905 | } | |
1906 | ||
1907 | int | |
1908 | rl_character_len (c, pos) | |
1909 | register int c, pos; | |
1910 | { | |
1911 | unsigned char uc; | |
1912 | ||
1913 | uc = (unsigned char)c; | |
1914 | ||
1915 | if (META_CHAR (uc)) | |
1916 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1917 | ||
1918 | if (uc == '\t') | |
1919 | { | |
1920 | #if defined (DISPLAY_TABS) | |
1921 | return (((pos | 7) + 1) - pos); | |
1922 | #else | |
1923 | return (2); | |
1924 | #endif /* !DISPLAY_TABS */ | |
1925 | } | |
1926 | ||
ccc6cda3 JA |
1927 | if (CTRL_CHAR (c) || c == RUBOUT) |
1928 | return (2); | |
1929 | ||
f73dda09 | 1930 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 | 1931 | } |
726f6388 JA |
1932 | /* How to print things in the "echo-area". The prompt is treated as a |
1933 | mini-modeline. */ | |
6e70dbff | 1934 | static int msg_saved_prompt = 0; |
726f6388 | 1935 | |
ccc6cda3 JA |
1936 | #if defined (USE_VARARGS) |
1937 | int | |
1938 | #if defined (PREFER_STDARG) | |
1939 | rl_message (const char *format, ...) | |
1940 | #else | |
726f6388 JA |
1941 | rl_message (va_alist) |
1942 | va_dcl | |
ccc6cda3 | 1943 | #endif |
726f6388 | 1944 | { |
726f6388 | 1945 | va_list args; |
ccc6cda3 JA |
1946 | #if defined (PREFER_VARARGS) |
1947 | char *format; | |
1948 | #endif | |
726f6388 | 1949 | |
ccc6cda3 JA |
1950 | #if defined (PREFER_STDARG) |
1951 | va_start (args, format); | |
1952 | #else | |
726f6388 JA |
1953 | va_start (args); |
1954 | format = va_arg (args, char *); | |
ccc6cda3 JA |
1955 | #endif |
1956 | ||
f73dda09 JA |
1957 | #if defined (HAVE_VSNPRINTF) |
1958 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
1959 | #else | |
726f6388 | 1960 | vsprintf (msg_buf, format, args); |
f73dda09 JA |
1961 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1962 | #endif | |
726f6388 JA |
1963 | va_end (args); |
1964 | ||
6e70dbff CR |
1965 | if (saved_local_prompt == 0) |
1966 | { | |
1967 | rl_save_prompt (); | |
1968 | msg_saved_prompt = 1; | |
1969 | } | |
726f6388 | 1970 | rl_display_prompt = msg_buf; |
6e70dbff CR |
1971 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
1972 | &prompt_last_invisible, | |
1973 | &prompt_invis_chars_first_line, | |
1974 | &prompt_physical_chars); | |
1975 | local_prompt_prefix = (char *)NULL; | |
efb82e99 | 1976 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 1977 | (*rl_redisplay_function) (); |
6e70dbff | 1978 | |
726f6388 JA |
1979 | return 0; |
1980 | } | |
ccc6cda3 JA |
1981 | #else /* !USE_VARARGS */ |
1982 | int | |
726f6388 JA |
1983 | rl_message (format, arg1, arg2) |
1984 | char *format; | |
1985 | { | |
1986 | sprintf (msg_buf, format, arg1, arg2); | |
f73dda09 | 1987 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
6e70dbff | 1988 | |
726f6388 | 1989 | rl_display_prompt = msg_buf; |
6e70dbff CR |
1990 | if (saved_local_prompt == 0) |
1991 | { | |
1992 | rl_save_prompt (); | |
1993 | msg_saved_prompt = 1; | |
1994 | } | |
1995 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, | |
1996 | &prompt_last_invisible, | |
1997 | &prompt_invis_chars_first_line, | |
1998 | &prompt_physical_chars); | |
1999 | local_prompt_prefix = (char *)NULL; | |
e7f1978a | 2000 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 2001 | (*rl_redisplay_function) (); |
6e70dbff | 2002 | |
726f6388 JA |
2003 | return 0; |
2004 | } | |
ccc6cda3 | 2005 | #endif /* !USE_VARARGS */ |
726f6388 JA |
2006 | |
2007 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 2008 | int |
726f6388 JA |
2009 | rl_clear_message () |
2010 | { | |
2011 | rl_display_prompt = rl_prompt; | |
6e70dbff CR |
2012 | if (msg_saved_prompt) |
2013 | { | |
2014 | rl_restore_prompt (); | |
2015 | msg_saved_prompt = 0; | |
2016 | } | |
ccc6cda3 | 2017 | (*rl_redisplay_function) (); |
726f6388 JA |
2018 | return 0; |
2019 | } | |
2020 | ||
ccc6cda3 | 2021 | int |
726f6388 JA |
2022 | rl_reset_line_state () |
2023 | { | |
2024 | rl_on_new_line (); | |
2025 | ||
2026 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
2027 | forced_display = 1; | |
2028 | return 0; | |
2029 | } | |
2030 | ||
ccc6cda3 | 2031 | void |
b72432fd | 2032 | rl_save_prompt () |
ccc6cda3 JA |
2033 | { |
2034 | saved_local_prompt = local_prompt; | |
2035 | saved_local_prefix = local_prompt_prefix; | |
6e70dbff | 2036 | saved_prefix_length = prompt_prefix_length; |
e7f1978a | 2037 | saved_local_length = local_prompt_len; |
28ef6c31 JA |
2038 | saved_last_invisible = prompt_last_invisible; |
2039 | saved_visible_length = prompt_visible_length; | |
d3a24ed2 | 2040 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
762a763b | 2041 | saved_physical_chars = prompt_physical_chars; |
ccc6cda3 JA |
2042 | |
2043 | local_prompt = local_prompt_prefix = (char *)0; | |
e7f1978a | 2044 | local_prompt_len = 0; |
6e70dbff | 2045 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
762a763b | 2046 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
2047 | } |
2048 | ||
2049 | void | |
b72432fd | 2050 | rl_restore_prompt () |
ccc6cda3 | 2051 | { |
28ef6c31 JA |
2052 | FREE (local_prompt); |
2053 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
2054 | |
2055 | local_prompt = saved_local_prompt; | |
2056 | local_prompt_prefix = saved_local_prefix; | |
e7f1978a | 2057 | local_prompt_len = saved_local_length; |
6e70dbff | 2058 | prompt_prefix_length = saved_prefix_length; |
28ef6c31 JA |
2059 | prompt_last_invisible = saved_last_invisible; |
2060 | prompt_visible_length = saved_visible_length; | |
d3a24ed2 | 2061 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
762a763b | 2062 | prompt_physical_chars = saved_physical_chars; |
6e70dbff CR |
2063 | |
2064 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
2065 | saved_local_prompt = saved_local_prefix = (char *)0; | |
e7f1978a | 2066 | saved_local_length = 0; |
6e70dbff CR |
2067 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; |
2068 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
ccc6cda3 JA |
2069 | } |
2070 | ||
2071 | char * | |
2072 | _rl_make_prompt_for_search (pchar) | |
2073 | int pchar; | |
2074 | { | |
2075 | int len; | |
0cc62c12 | 2076 | char *pmt, *p; |
ccc6cda3 | 2077 | |
b72432fd | 2078 | rl_save_prompt (); |
ccc6cda3 | 2079 | |
0cc62c12 CR |
2080 | /* We've saved the prompt, and can do anything with the various prompt |
2081 | strings we need before they're restored. We want the unexpanded | |
2082 | portion of the prompt string after any final newline. */ | |
2083 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; | |
2084 | if (p == 0) | |
2085 | { | |
2086 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
2087 | pmt = (char *)xmalloc (len + 2); | |
2088 | if (len) | |
2089 | strcpy (pmt, rl_prompt); | |
2090 | pmt[len] = pchar; | |
2091 | pmt[len+1] = '\0'; | |
2092 | } | |
2093 | else | |
2094 | { | |
2095 | p++; | |
2096 | len = strlen (p); | |
2097 | pmt = (char *)xmalloc (len + 2); | |
2098 | if (len) | |
2099 | strcpy (pmt, p); | |
2100 | pmt[len] = pchar; | |
2101 | pmt[len+1] = '\0'; | |
2102 | } | |
762a763b | 2103 | |
2abb7255 | 2104 | /* will be overwritten by expand_prompt, called from rl_message */ |
6e70dbff | 2105 | prompt_physical_chars = saved_physical_chars + 1; |
ccc6cda3 JA |
2106 | return pmt; |
2107 | } | |
2108 | ||
726f6388 JA |
2109 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
2110 | void | |
2111 | _rl_erase_at_end_of_line (l) | |
2112 | int l; | |
2113 | { | |
2114 | register int i; | |
2115 | ||
ccc6cda3 | 2116 | _rl_backspace (l); |
726f6388 JA |
2117 | for (i = 0; i < l; i++) |
2118 | putc (' ', rl_outstream); | |
ccc6cda3 | 2119 | _rl_backspace (l); |
726f6388 JA |
2120 | for (i = 0; i < l; i++) |
2121 | visible_line[--_rl_last_c_pos] = '\0'; | |
2122 | rl_display_fixed++; | |
2123 | } | |
2124 | ||
2125 | /* Clear to the end of the line. COUNT is the minimum | |
2126 | number of character spaces to clear, */ | |
d166f048 JA |
2127 | void |
2128 | _rl_clear_to_eol (count) | |
726f6388 JA |
2129 | int count; |
2130 | { | |
28ef6c31 JA |
2131 | if (_rl_term_clreol) |
2132 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d166f048 | 2133 | else if (count) |
726f6388 JA |
2134 | space_to_eol (count); |
2135 | } | |
2136 | ||
2137 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2138 | number of character spaces to clear, */ | |
2139 | static void | |
2140 | space_to_eol (count) | |
2141 | int count; | |
2142 | { | |
2143 | register int i; | |
2144 | ||
2145 | for (i = 0; i < count; i++) | |
2146 | putc (' ', rl_outstream); | |
2147 | ||
2148 | _rl_last_c_pos += count; | |
2149 | } | |
2150 | ||
d166f048 JA |
2151 | void |
2152 | _rl_clear_screen () | |
2153 | { | |
28ef6c31 JA |
2154 | if (_rl_term_clrpag) |
2155 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 2156 | else |
28ef6c31 | 2157 | rl_crlf (); |
d166f048 JA |
2158 | } |
2159 | ||
7117c2d2 | 2160 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 2161 | static void |
7117c2d2 | 2162 | insert_some_chars (string, count, col) |
726f6388 | 2163 | char *string; |
7117c2d2 | 2164 | int count, col; |
726f6388 | 2165 | { |
9607141c CR |
2166 | #if defined (__MSDOS__) || defined (__MINGW32__) |
2167 | _rl_output_some_chars (string, count); | |
2168 | #else | |
7117c2d2 JA |
2169 | /* DEBUGGING */ |
2170 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2171 | if (count != col) | |
258e3d46 | 2172 | _rl_ttymsg ("debug: insert_some_chars: count (%d) != col (%d)", count, col); |
7117c2d2 | 2173 | |
726f6388 | 2174 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2175 | if (_rl_term_IC) |
726f6388 | 2176 | { |
ccc6cda3 | 2177 | char *buffer; |
7117c2d2 JA |
2178 | |
2179 | buffer = tgoto (_rl_term_IC, 0, col); | |
726f6388 JA |
2180 | tputs (buffer, 1, _rl_output_character_function); |
2181 | _rl_output_some_chars (string, count); | |
2182 | } | |
2183 | else | |
2184 | { | |
2185 | register int i; | |
2186 | ||
2187 | /* If we have to turn on insert-mode, then do so. */ | |
28ef6c31 JA |
2188 | if (_rl_term_im && *_rl_term_im) |
2189 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
726f6388 JA |
2190 | |
2191 | /* If there is a special command for inserting characters, then | |
2192 | use that first to open up the space. */ | |
28ef6c31 | 2193 | if (_rl_term_ic && *_rl_term_ic) |
726f6388 | 2194 | { |
7117c2d2 | 2195 | for (i = col; i--; ) |
28ef6c31 | 2196 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
726f6388 JA |
2197 | } |
2198 | ||
2199 | /* Print the text. */ | |
2200 | _rl_output_some_chars (string, count); | |
2201 | ||
2202 | /* If there is a string to turn off insert mode, we had best use | |
2203 | it now. */ | |
28ef6c31 JA |
2204 | if (_rl_term_ei && *_rl_term_ei) |
2205 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
726f6388 | 2206 | } |
9607141c | 2207 | #endif /* __MSDOS__ || __MINGW32__ */ |
726f6388 JA |
2208 | } |
2209 | ||
2210 | /* Delete COUNT characters from the display line. */ | |
2211 | static void | |
2212 | delete_chars (count) | |
2213 | int count; | |
2214 | { | |
28ef6c31 | 2215 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2216 | return; |
2217 | ||
9607141c | 2218 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
28ef6c31 | 2219 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2220 | { |
ccc6cda3 | 2221 | char *buffer; |
28ef6c31 | 2222 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2223 | tputs (buffer, count, _rl_output_character_function); |
2224 | } | |
2225 | else | |
2226 | { | |
28ef6c31 | 2227 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2228 | while (count--) |
28ef6c31 | 2229 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2230 | } |
9607141c | 2231 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
726f6388 JA |
2232 | } |
2233 | ||
2234 | void | |
2235 | _rl_update_final () | |
2236 | { | |
2237 | int full_lines; | |
2238 | ||
2239 | full_lines = 0; | |
ccc6cda3 JA |
2240 | /* If the cursor is the only thing on an otherwise-blank last line, |
2241 | compensate so we don't print an extra CRLF. */ | |
2242 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2243 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2244 | { |
2245 | _rl_vis_botlin--; | |
2246 | full_lines = 1; | |
2247 | } | |
2248 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2249 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2250 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2251 | { |
726f6388 | 2252 | char *last_line; |
7117c2d2 | 2253 | |
bb70624e | 2254 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
9697d2dc CR |
2255 | cpos_buffer_position = -1; /* don't know where we are in buffer */ |
2256 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */ | |
d166f048 | 2257 | _rl_clear_to_eol (0); |
28ef6c31 | 2258 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2259 | } |
2260 | _rl_vis_botlin = 0; | |
28ef6c31 | 2261 | rl_crlf (); |
726f6388 JA |
2262 | fflush (rl_outstream); |
2263 | rl_display_fixed++; | |
2264 | } | |
2265 | ||
2266 | /* Move to the start of the current line. */ | |
2267 | static void | |
2268 | cr () | |
2269 | { | |
28ef6c31 | 2270 | if (_rl_term_cr) |
726f6388 | 2271 | { |
bb70624e JA |
2272 | #if defined (__MSDOS__) |
2273 | putc ('\r', rl_outstream); | |
2274 | #else | |
28ef6c31 | 2275 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2276 | #endif |
726f6388 JA |
2277 | _rl_last_c_pos = 0; |
2278 | } | |
2279 | } | |
2280 | ||
bb70624e JA |
2281 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2282 | terminal escape sequences. Called with the cursor at column 0 of the | |
2283 | line to draw the prompt on. */ | |
2284 | static void | |
2285 | redraw_prompt (t) | |
2286 | char *t; | |
2287 | { | |
6e70dbff | 2288 | char *oldp; |
bb70624e | 2289 | |
bb70624e | 2290 | oldp = rl_display_prompt; |
6e70dbff | 2291 | rl_save_prompt (); |
bb70624e JA |
2292 | |
2293 | rl_display_prompt = t; | |
28ef6c31 JA |
2294 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2295 | &prompt_last_invisible, | |
43cdcad8 CR |
2296 | &prompt_invis_chars_first_line, |
2297 | &prompt_physical_chars); | |
bb70624e | 2298 | local_prompt_prefix = (char *)NULL; |
e7f1978a | 2299 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
6e70dbff | 2300 | |
bb70624e JA |
2301 | rl_forced_update_display (); |
2302 | ||
2303 | rl_display_prompt = oldp; | |
6e70dbff | 2304 | rl_restore_prompt(); |
bb70624e JA |
2305 | } |
2306 | ||
726f6388 JA |
2307 | /* Redisplay the current line after a SIGWINCH is received. */ |
2308 | void | |
2309 | _rl_redisplay_after_sigwinch () | |
2310 | { | |
bb70624e | 2311 | char *t; |
726f6388 | 2312 | |
906833f0 CR |
2313 | /* Clear the last line (assuming that the screen size change will result in |
2314 | either more or fewer characters on that line only) and put the cursor at | |
2315 | column 0. Make sure the right thing happens if we have wrapped to a new | |
2316 | screen line. */ | |
28ef6c31 | 2317 | if (_rl_term_cr) |
726f6388 | 2318 | { |
906833f0 CR |
2319 | _rl_move_vert (_rl_vis_botlin); |
2320 | ||
bb70624e JA |
2321 | #if defined (__MSDOS__) |
2322 | putc ('\r', rl_outstream); | |
2323 | #else | |
28ef6c31 | 2324 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2325 | #endif |
726f6388 | 2326 | _rl_last_c_pos = 0; |
bb70624e | 2327 | #if defined (__MSDOS__) |
28ef6c31 | 2328 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2329 | putc ('\r', rl_outstream); |
2330 | #else | |
28ef6c31 JA |
2331 | if (_rl_term_clreol) |
2332 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2333 | else |
2334 | { | |
28ef6c31 JA |
2335 | space_to_eol (_rl_screenwidth); |
2336 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2337 | } |
bb70624e | 2338 | #endif |
726f6388 JA |
2339 | if (_rl_last_v_pos > 0) |
2340 | _rl_move_vert (0); | |
2341 | } | |
2342 | else | |
28ef6c31 | 2343 | rl_crlf (); |
726f6388 JA |
2344 | |
2345 | /* Redraw only the last line of a multi-line prompt. */ | |
2346 | t = strrchr (rl_display_prompt, '\n'); | |
2347 | if (t) | |
bb70624e | 2348 | redraw_prompt (++t); |
726f6388 JA |
2349 | else |
2350 | rl_forced_update_display (); | |
2351 | } | |
ccc6cda3 JA |
2352 | |
2353 | void | |
2354 | _rl_clean_up_for_exit () | |
2355 | { | |
2356 | if (readline_echoing_p) | |
2357 | { | |
2358 | _rl_move_vert (_rl_vis_botlin); | |
2359 | _rl_vis_botlin = 0; | |
2360 | fflush (rl_outstream); | |
b72432fd | 2361 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2362 | } |
2363 | } | |
b72432fd JA |
2364 | |
2365 | void | |
2366 | _rl_erase_entire_line () | |
2367 | { | |
2368 | cr (); | |
2369 | _rl_clear_to_eol (0); | |
2370 | cr (); | |
2371 | fflush (rl_outstream); | |
2372 | } | |
bb70624e JA |
2373 | |
2374 | /* return the `current display line' of the cursor -- the number of lines to | |
2375 | move up to get to the first screen line of the current readline line. */ | |
2376 | int | |
2377 | _rl_current_display_line () | |
2378 | { | |
2379 | int ret, nleft; | |
2380 | ||
2381 | /* Find out whether or not there might be invisible characters in the | |
2382 | editing buffer. */ | |
2383 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2384 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2385 | else |
28ef6c31 | 2386 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2387 | |
2388 | if (nleft > 0) | |
28ef6c31 | 2389 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2390 | else |
2391 | ret = 0; | |
2392 | ||
2393 | return ret; | |
2394 | } | |
7117c2d2 JA |
2395 | |
2396 | #if defined (HANDLE_MULTIBYTE) | |
2397 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2398 | In the case of multibyte characters with stateful encoding, we have to | |
2399 | scan from the beginning of the string to take the state into account. */ | |
2400 | static int | |
2401 | _rl_col_width (str, start, end) | |
d3a24ed2 | 2402 | const char *str; |
7117c2d2 JA |
2403 | int start, end; |
2404 | { | |
2405 | wchar_t wc; | |
5cef52a7 | 2406 | mbstate_t ps; |
7117c2d2 JA |
2407 | int tmp, point, width, max; |
2408 | ||
2409 | if (end <= start) | |
2410 | return 0; | |
2569d6d5 CR |
2411 | if (MB_CUR_MAX == 1 || rl_byte_oriented) |
2412 | { | |
258e3d46 | 2413 | _rl_ttymsg ("_rl_col_width: called with MB_CUR_MAX == 1"); |
906833f0 | 2414 | return (end - start); |
2569d6d5 | 2415 | } |
7117c2d2 | 2416 | |
5cef52a7 CR |
2417 | memset (&ps, 0, sizeof (mbstate_t)); |
2418 | ||
7117c2d2 JA |
2419 | point = 0; |
2420 | max = end; | |
2421 | ||
2422 | while (point < start) | |
2423 | { | |
2424 | tmp = mbrlen (str + point, max, &ps); | |
d3a24ed2 | 2425 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2426 | { |
2427 | /* In this case, the bytes are invalid or too short to compose a | |
2428 | multibyte character, so we assume that the first byte represents | |
2429 | a single character. */ | |
2430 | point++; | |
2431 | max--; | |
2432 | ||
2433 | /* Clear the state of the byte sequence, because in this case the | |
2434 | effect of mbstate is undefined. */ | |
2435 | memset (&ps, 0, sizeof (mbstate_t)); | |
2436 | } | |
d3a24ed2 | 2437 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2438 | break; /* Found '\0' */ |
7117c2d2 JA |
2439 | else |
2440 | { | |
2441 | point += tmp; | |
2442 | max -= tmp; | |
2443 | } | |
2444 | } | |
2445 | ||
2446 | /* If START is not a byte that starts a character, then POINT will be | |
2447 | greater than START. In this case, assume that (POINT - START) gives | |
2448 | a byte count that is the number of columns of difference. */ | |
2449 | width = point - start; | |
2450 | ||
2451 | while (point < end) | |
2452 | { | |
2453 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
d3a24ed2 | 2454 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2455 | { |
2456 | /* In this case, the bytes are invalid or too short to compose a | |
2457 | multibyte character, so we assume that the first byte represents | |
2458 | a single character. */ | |
2459 | point++; | |
2460 | max--; | |
2461 | ||
2462 | /* and assume that the byte occupies a single column. */ | |
2463 | width++; | |
2464 | ||
2465 | /* Clear the state of the byte sequence, because in this case the | |
2466 | effect of mbstate is undefined. */ | |
2467 | memset (&ps, 0, sizeof (mbstate_t)); | |
2468 | } | |
d3a24ed2 | 2469 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2470 | break; /* Found '\0' */ |
7117c2d2 JA |
2471 | else |
2472 | { | |
2473 | point += tmp; | |
2474 | max -= tmp; | |
2475 | tmp = wcwidth(wc); | |
2476 | width += (tmp >= 0) ? tmp : 1; | |
2477 | } | |
2478 | } | |
2479 | ||
2480 | width += point - end; | |
2481 | ||
2482 | return width; | |
2483 | } | |
2484 | #endif /* HANDLE_MULTIBYTE */ |