]>
Commit | Line | Data |
---|---|---|
726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
012bac39 | 3 | /* Copyright (C) 1987-2009 Free Software Foundation, Inc. |
726f6388 | 4 | |
2e4498b3 CR |
5 | This file is part of the GNU Readline Library (Readline), a library |
6 | for reading lines of text with interactive input and history editing. | |
726f6388 | 7 | |
2e4498b3 CR |
8 | Readline is free software: you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation, either version 3 of the License, or | |
726f6388 JA |
11 | (at your option) any later version. |
12 | ||
2e4498b3 CR |
13 | Readline is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
726f6388 JA |
16 | GNU General Public License for more details. |
17 | ||
2e4498b3 CR |
18 | You should have received a copy of the GNU General Public License |
19 | along with Readline. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
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 | |
d3ad40de 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]; | |
c2a47ea9 | 85 | static int line_structures_initialized = 0; |
d3ad40de CR |
86 | |
87 | /* Backwards-compatible names. */ | |
88 | #define inv_lbreaks (line_state_invisible->lbreaks) | |
89 | #define inv_lbsize (line_state_invisible->lbsize) | |
90 | #define vis_lbreaks (line_state_visible->lbreaks) | |
91 | #define vis_lbsize (line_state_visible->lbsize) | |
92 | ||
93 | #define visible_line (line_state_visible->line) | |
94 | #define invisible_line (line_state_invisible->line) | |
95 | ||
7117c2d2 | 96 | #if defined (HANDLE_MULTIBYTE) |
d3a24ed2 | 97 | static int _rl_col_width PARAMS((const char *, int, int)); |
7117c2d2 JA |
98 | #else |
99 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
100 | #endif | |
101 | ||
726f6388 | 102 | /* Heuristic used to decide whether it is faster to move from CUR to NEW |
d3ad40de CR |
103 | by backing up or outputting a carriage return and moving forward. CUR |
104 | and NEW are either both buffer positions or absolute screen positions. */ | |
726f6388 JA |
105 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) |
106 | ||
ac18b312 CR |
107 | /* _rl_last_c_pos is an absolute cursor position in multibyte locales and a |
108 | buffer index in others. This macro is used when deciding whether the | |
109 | current cursor position is in the middle of a prompt string containing | |
d3ad40de | 110 | invisible characters. XXX - might need to take `modmark' into account. */ |
ac18b312 | 111 | #define PROMPT_ENDING_INDEX \ |
2abb7255 | 112 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1) |
ac18b312 CR |
113 | |
114 | ||
726f6388 JA |
115 | /* **************************************************************** */ |
116 | /* */ | |
117 | /* Display stuff */ | |
118 | /* */ | |
119 | /* **************************************************************** */ | |
120 | ||
121 | /* This is the stuff that is hard for me. I never seem to write good | |
122 | display routines in C. Let's see how I do this time. */ | |
123 | ||
124 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
125 | the problems of input lines longer than the screen width. | |
126 | ||
127 | update_line and the code that calls it makes a multiple line, | |
128 | automatically wrapping line update. Careful attention needs | |
129 | to be paid to the vertical position variables. */ | |
130 | ||
131 | /* Keep two buffers; one which reflects the current contents of the | |
132 | screen, and the other to draw what we think the new contents should | |
133 | be. Then compare the buffers, and make whatever changes to the | |
134 | screen itself that we should. Finally, make the buffer that we | |
135 | just drew into be the one which reflects the current contents of the | |
136 | screen, and place the cursor where it belongs. | |
137 | ||
138 | Commands that want to can fix the display themselves, and then let | |
139 | this function know that the display has been fixed by setting the | |
140 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
141 | ||
ccc6cda3 | 142 | /* Application-specific redisplay function. */ |
28ef6c31 | 143 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 144 | |
726f6388 JA |
145 | /* Global variables declared here. */ |
146 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
147 | int rl_display_fixed = 0; | |
148 | ||
ccc6cda3 | 149 | int _rl_suppress_redisplay = 0; |
798a67db | 150 | int _rl_want_redisplay = 0; |
ccc6cda3 | 151 | |
726f6388 JA |
152 | /* The stuff that gets printed out before the actual text of the line. |
153 | This is usually pointing to rl_prompt. */ | |
154 | char *rl_display_prompt = (char *)NULL; | |
155 | ||
156 | /* Pseudo-global variables declared here. */ | |
177d51f7 | 157 | |
726f6388 | 158 | /* The visible cursor position. If you print some text, adjust this. */ |
177d51f7 CR |
159 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
160 | supporting multibyte characters, and an absolute cursor position when | |
161 | in such a locale. This is an artifact of the donated multibyte support. | |
162 | Care must be taken when modifying its value. */ | |
726f6388 JA |
163 | int _rl_last_c_pos = 0; |
164 | int _rl_last_v_pos = 0; | |
165 | ||
5c26afb8 | 166 | static int cpos_adjusted; |
d3ad40de CR |
167 | static int cpos_buffer_position; |
168 | static int prompt_multibyte_chars; | |
5c26afb8 | 169 | |
726f6388 JA |
170 | /* Number of lines currently on screen minus 1. */ |
171 | int _rl_vis_botlin = 0; | |
172 | ||
173 | /* Variables used only in this file. */ | |
174 | /* The last left edge of text that was displayed. This is used when | |
175 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 176 | static int last_lmargin; |
726f6388 | 177 | |
726f6388 JA |
178 | /* A buffer for `modeline' messages. */ |
179 | static char msg_buf[128]; | |
180 | ||
181 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 182 | static int forced_display; |
726f6388 JA |
183 | |
184 | /* Default and initial buffer size. Can grow. */ | |
185 | static int line_size = 1024; | |
186 | ||
28ef6c31 JA |
187 | /* Variables to keep track of the expanded prompt string, which may |
188 | include invisible characters. */ | |
189 | ||
726f6388 | 190 | static char *local_prompt, *local_prompt_prefix; |
d3ad40de | 191 | static int local_prompt_len; |
28ef6c31 | 192 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
193 | |
194 | /* The number of invisible characters in the line currently being | |
195 | displayed on the screen. */ | |
ccc6cda3 JA |
196 | static int visible_wrap_offset; |
197 | ||
28ef6c31 JA |
198 | /* The number of invisible characters in the prompt string. Static so it |
199 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
200 | static int wrap_offset; |
201 | ||
28ef6c31 JA |
202 | /* The index of the last invisible character in the prompt string. */ |
203 | static int prompt_last_invisible; | |
726f6388 JA |
204 | |
205 | /* The length (buffer offset) of the first line of the last (possibly | |
206 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 207 | static int visible_first_line_len; |
726f6388 | 208 | |
28ef6c31 JA |
209 | /* Number of invisible characters on the first physical line of the prompt. |
210 | Only valid when the number of physical characters in the prompt exceeds | |
211 | (or is equal to) _rl_screenwidth. */ | |
212 | static int prompt_invis_chars_first_line; | |
213 | ||
214 | static int prompt_last_screen_line; | |
215 | ||
43cdcad8 CR |
216 | static int prompt_physical_chars; |
217 | ||
d3ad40de CR |
218 | /* set to a non-zero value by rl_redisplay if we are marking modified history |
219 | lines and the current line is so marked. */ | |
220 | static int modmark; | |
221 | ||
6e70dbff CR |
222 | /* Variables to save and restore prompt and display information. */ |
223 | ||
224 | /* These are getting numerous enough that it's time to create a struct. */ | |
225 | ||
226 | static char *saved_local_prompt; | |
227 | static char *saved_local_prefix; | |
228 | static int saved_last_invisible; | |
229 | static int saved_visible_length; | |
230 | static int saved_prefix_length; | |
d3ad40de | 231 | static int saved_local_length; |
6e70dbff CR |
232 | static int saved_invis_chars_first_line; |
233 | static int saved_physical_chars; | |
234 | ||
726f6388 JA |
235 | /* Expand the prompt string S and return the number of visible |
236 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 237 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
238 | index of the last invisible character in the returned string. NIFLP, |
239 | if non-zero, is a place to store the number of invisible characters in | |
43cdcad8 CR |
240 | the first prompt line. The previous are used as byte counts -- indexes |
241 | into a character buffer. */ | |
726f6388 JA |
242 | |
243 | /* Current implementation: | |
244 | \001 (^A) start non-visible characters | |
245 | \002 (^B) end non-visible characters | |
246 | all characters except \001 and \002 (following a \001) are copied to | |
247 | the returned string; all characters except those between \001 and | |
248 | \002 are assumed to be `visible'. */ | |
249 | ||
250 | static char * | |
43cdcad8 | 251 | expand_prompt (pmt, lp, lip, niflp, vlp) |
726f6388 | 252 | char *pmt; |
43cdcad8 | 253 | int *lp, *lip, *niflp, *vlp; |
726f6388 | 254 | { |
5e4a95c7 | 255 | char *r, *ret, *p, *igstart; |
b954488b | 256 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
726f6388 JA |
257 | |
258 | /* Short-circuit if we can. */ | |
43cdcad8 | 259 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 JA |
260 | { |
261 | r = savestring (pmt); | |
262 | if (lp) | |
263 | *lp = strlen (r); | |
43cdcad8 CR |
264 | if (lip) |
265 | *lip = 0; | |
266 | if (niflp) | |
267 | *niflp = 0; | |
268 | if (vlp) | |
269 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
270 | return r; |
271 | } | |
272 | ||
ccc6cda3 | 273 | l = strlen (pmt); |
f73dda09 | 274 | r = ret = (char *)xmalloc (l + 1); |
28ef6c31 JA |
275 | |
276 | invfl = 0; /* invisible chars in first line of prompt */ | |
b954488b | 277 | invflset = 0; /* we only want to set invfl once */ |
28ef6c31 | 278 | |
dc8fbaf9 | 279 | igstart = 0; |
43cdcad8 | 280 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
726f6388 JA |
281 | { |
282 | /* This code strips the invisible character string markers | |
283 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
dc8fbaf9 | 284 | if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */ |
726f6388 | 285 | { |
5e4a95c7 CR |
286 | ignoring = 1; |
287 | igstart = p; | |
726f6388 JA |
288 | continue; |
289 | } | |
290 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
291 | { | |
292 | ignoring = 0; | |
dc8fbaf9 | 293 | if (p != (igstart + 1)) |
1569c106 | 294 | last = r - ret - 1; |
726f6388 JA |
295 | continue; |
296 | } | |
297 | else | |
298 | { | |
43cdcad8 CR |
299 | #if defined (HANDLE_MULTIBYTE) |
300 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
301 | { | |
302 | pind = p - pmt; | |
303 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); | |
304 | l = ind - pind; | |
305 | while (l--) | |
306 | *r++ = *p++; | |
307 | if (!ignoring) | |
37c41ab1 | 308 | { |
d3ad40de CR |
309 | /* rl ends up being assigned to prompt_visible_length, |
310 | which is the number of characters in the buffer that | |
311 | contribute to characters on the screen, which might | |
312 | not be the same as the number of physical characters | |
313 | on the screen in the presence of multibyte characters */ | |
37c41ab1 CR |
314 | rl += ind - pind; |
315 | physchars += _rl_col_width (pmt, pind, ind); | |
316 | } | |
43cdcad8 CR |
317 | else |
318 | ninvis += ind - pind; | |
319 | p--; /* compensate for later increment */ | |
320 | } | |
28ef6c31 | 321 | else |
43cdcad8 CR |
322 | #endif |
323 | { | |
324 | *r++ = *p; | |
325 | if (!ignoring) | |
37c41ab1 CR |
326 | { |
327 | rl++; /* visible length byte counter */ | |
328 | physchars++; | |
329 | } | |
43cdcad8 CR |
330 | else |
331 | ninvis++; /* invisible chars byte counter */ | |
332 | } | |
333 | ||
b954488b CR |
334 | if (invflset == 0 && rl >= _rl_screenwidth) |
335 | { | |
336 | invfl = ninvis; | |
337 | invflset = 1; | |
338 | } | |
726f6388 JA |
339 | } |
340 | } | |
341 | ||
28ef6c31 JA |
342 | if (rl < _rl_screenwidth) |
343 | invfl = ninvis; | |
344 | ||
726f6388 JA |
345 | *r = '\0'; |
346 | if (lp) | |
347 | *lp = rl; | |
ccc6cda3 JA |
348 | if (lip) |
349 | *lip = last; | |
28ef6c31 JA |
350 | if (niflp) |
351 | *niflp = invfl; | |
43cdcad8 CR |
352 | if (vlp) |
353 | *vlp = physchars; | |
726f6388 JA |
354 | return ret; |
355 | } | |
356 | ||
bb70624e JA |
357 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
358 | PMT and return the rest of PMT. */ | |
359 | char * | |
360 | _rl_strip_prompt (pmt) | |
361 | char *pmt; | |
362 | { | |
363 | char *ret; | |
364 | ||
43cdcad8 | 365 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
366 | return ret; |
367 | } | |
368 | ||
726f6388 JA |
369 | /* |
370 | * Expand the prompt string into the various display components, if | |
371 | * necessary. | |
372 | * | |
373 | * local_prompt = expanded last line of string in rl_display_prompt | |
374 | * (portion after the final newline) | |
375 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
376 | * expanded via expand_prompt | |
28ef6c31 JA |
377 | * prompt_visible_length = number of visible characters in local_prompt |
378 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
379 | * |
380 | * This function is called once per call to readline(). It may also be | |
381 | * called arbitrarily to expand the primary prompt. | |
382 | * | |
383 | * The return value is the number of visible characters on the last line | |
384 | * of the (possibly multi-line) prompt. | |
385 | */ | |
386 | int | |
387 | rl_expand_prompt (prompt) | |
388 | char *prompt; | |
389 | { | |
390 | char *p, *t; | |
391 | int c; | |
392 | ||
393 | /* Clear out any saved values. */ | |
28ef6c31 JA |
394 | FREE (local_prompt); |
395 | FREE (local_prompt_prefix); | |
396 | ||
726f6388 | 397 | local_prompt = local_prompt_prefix = (char *)0; |
d3ad40de | 398 | local_prompt_len = 0; |
ec2199bd CR |
399 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
400 | prompt_visible_length = prompt_physical_chars = 0; | |
726f6388 | 401 | |
ccc6cda3 | 402 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
403 | return (0); |
404 | ||
405 | p = strrchr (prompt, '\n'); | |
406 | if (!p) | |
407 | { | |
28ef6c31 JA |
408 | /* The prompt is only one logical line, though it might wrap. */ |
409 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
410 | &prompt_last_invisible, | |
43cdcad8 CR |
411 | &prompt_invis_chars_first_line, |
412 | &prompt_physical_chars); | |
726f6388 | 413 | local_prompt_prefix = (char *)0; |
d3ad40de | 414 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 415 | return (prompt_visible_length); |
726f6388 JA |
416 | } |
417 | else | |
418 | { | |
419 | /* The prompt spans multiple lines. */ | |
420 | t = ++p; | |
28ef6c31 JA |
421 | local_prompt = expand_prompt (p, &prompt_visible_length, |
422 | &prompt_last_invisible, | |
70694d2e | 423 | &prompt_invis_chars_first_line, |
e6e3b444 | 424 | &prompt_physical_chars); |
726f6388 JA |
425 | c = *t; *t = '\0'; |
426 | /* The portion of the prompt string up to and including the | |
427 | final newline is now null-terminated. */ | |
28ef6c31 JA |
428 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
429 | (int *)NULL, | |
70694d2e | 430 | (int *)NULL, |
e6e3b444 | 431 | (int *)NULL); |
726f6388 | 432 | *t = c; |
d3ad40de | 433 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 434 | return (prompt_prefix_length); |
726f6388 JA |
435 | } |
436 | } | |
437 | ||
bb70624e JA |
438 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
439 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
440 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
441 | increased. If the lines have already been allocated, this ensures that | |
442 | they can hold at least MINSIZE characters. */ | |
443 | static void | |
444 | init_line_structures (minsize) | |
445 | int minsize; | |
446 | { | |
447 | register int n; | |
448 | ||
449 | if (invisible_line == 0) /* initialize it */ | |
450 | { | |
451 | if (line_size < minsize) | |
452 | line_size = minsize; | |
f73dda09 JA |
453 | visible_line = (char *)xmalloc (line_size); |
454 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
455 | } |
456 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
457 | { | |
458 | line_size *= 2; | |
459 | if (line_size < minsize) | |
460 | line_size = minsize; | |
f73dda09 JA |
461 | visible_line = (char *)xrealloc (visible_line, line_size); |
462 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
463 | } |
464 | ||
465 | for (n = minsize; n < line_size; n++) | |
466 | { | |
467 | visible_line[n] = 0; | |
468 | invisible_line[n] = 1; | |
469 | } | |
470 | ||
471 | if (vis_lbreaks == 0) | |
472 | { | |
473 | /* should be enough. */ | |
474 | inv_lbsize = vis_lbsize = 256; | |
c2a47ea9 | 475 | |
7117c2d2 | 476 | #if defined (HANDLE_MULTIBYTE) |
d3ad40de CR |
477 | line_state_visible->wbsize = vis_lbsize; |
478 | line_state_visible->wrapped_line = (int *)xmalloc (line_state_visible->wbsize * sizeof (int)); | |
479 | ||
480 | line_state_invisible->wbsize = inv_lbsize; | |
481 | line_state_invisible->wrapped_line = (int *)xmalloc (line_state_invisible->wbsize * sizeof (int)); | |
7117c2d2 | 482 | #endif |
c2a47ea9 CR |
483 | |
484 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
485 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
bb70624e JA |
486 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
487 | } | |
c2a47ea9 CR |
488 | |
489 | line_structures_initialized = 1; | |
bb70624e JA |
490 | } |
491 | ||
726f6388 JA |
492 | /* Basic redisplay algorithm. */ |
493 | void | |
494 | rl_redisplay () | |
495 | { | |
ccc6cda3 JA |
496 | register int in, out, c, linenum, cursor_linenum; |
497 | register char *line; | |
d3ad40de | 498 | int inv_botlin, lb_botlin, lb_linenum, o_cpos; |
57a3f689 | 499 | int newlines, lpos, temp, n0, num, prompt_lines_estimate; |
726f6388 | 500 | char *prompt_this_line; |
7117c2d2 JA |
501 | #if defined (HANDLE_MULTIBYTE) |
502 | wchar_t wc; | |
503 | size_t wc_bytes; | |
504 | int wc_width; | |
505 | mbstate_t ps; | |
506 | int _rl_wrapped_multicolumn = 0; | |
507 | #endif | |
726f6388 | 508 | |
6fbe7620 | 509 | if (_rl_echoing_p == 0) |
726f6388 JA |
510 | return; |
511 | ||
d356441f CR |
512 | /* Block keyboard interrupts because this function manipulates global |
513 | data structures. */ | |
514 | _rl_block_sigint (); | |
0d8616ff | 515 | _rl_block_sigwinch (); |
d356441f | 516 | |
726f6388 JA |
517 | if (!rl_display_prompt) |
518 | rl_display_prompt = ""; | |
519 | ||
c2a47ea9 | 520 | if (line_structures_initialized == 0) |
726f6388 | 521 | { |
bb70624e | 522 | init_line_structures (0); |
726f6388 JA |
523 | rl_on_new_line (); |
524 | } | |
525 | ||
526 | /* Draw the line into the buffer. */ | |
d3ad40de CR |
527 | cpos_buffer_position = -1; |
528 | ||
529 | prompt_multibyte_chars = prompt_visible_length - prompt_physical_chars; | |
6ec48275 | 530 | |
ccc6cda3 JA |
531 | line = invisible_line; |
532 | out = inv_botlin = 0; | |
533 | ||
726f6388 JA |
534 | /* Mark the line as modified or not. We only do this for history |
535 | lines. */ | |
43cdcad8 | 536 | modmark = 0; |
726f6388 JA |
537 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
538 | { | |
539 | line[out++] = '*'; | |
540 | line[out] = '\0'; | |
43cdcad8 | 541 | modmark = 1; |
726f6388 JA |
542 | } |
543 | ||
544 | /* If someone thought that the redisplay was handled, but the currently | |
545 | visible line has a different modification state than the one about | |
546 | to become visible, then correct the caller's misconception. */ | |
547 | if (visible_line[0] != invisible_line[0]) | |
548 | rl_display_fixed = 0; | |
549 | ||
550 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
551 | one passed to readline()), use the values we have already expanded. | |
552 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
553 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 554 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 | 555 | { |
726f6388 JA |
556 | if (local_prompt_prefix && forced_display) |
557 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
558 | ||
d3ad40de | 559 | if (local_prompt_len > 0) |
ccc6cda3 | 560 | { |
d3ad40de | 561 | temp = local_prompt_len + out + 2; |
b72432fd JA |
562 | if (temp >= line_size) |
563 | { | |
564 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
565 | visible_line = (char *)xrealloc (visible_line, line_size); |
566 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 567 | } |
d3ad40de CR |
568 | strncpy (line + out, local_prompt, local_prompt_len); |
569 | out += local_prompt_len; | |
ccc6cda3 | 570 | } |
726f6388 | 571 | line[out] = '\0'; |
d3ad40de | 572 | wrap_offset = local_prompt_len - prompt_visible_length; |
726f6388 JA |
573 | } |
574 | else | |
575 | { | |
576 | int pmtlen; | |
577 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
578 | if (!prompt_this_line) | |
579 | prompt_this_line = rl_display_prompt; | |
580 | else | |
581 | { | |
582 | prompt_this_line++; | |
bb70624e | 583 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 584 | if (forced_display) |
ccc6cda3 | 585 | { |
bb70624e | 586 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
587 | /* Make sure we are at column zero even after a newline, |
588 | regardless of the state of terminal output processing. */ | |
bb70624e | 589 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
590 | cr (); |
591 | } | |
726f6388 JA |
592 | } |
593 | ||
762a763b | 594 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
595 | temp = pmtlen + out + 2; |
596 | if (temp >= line_size) | |
597 | { | |
598 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
599 | visible_line = (char *)xrealloc (visible_line, line_size); |
600 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 601 | } |
726f6388 JA |
602 | strncpy (line + out, prompt_this_line, pmtlen); |
603 | out += pmtlen; | |
604 | line[out] = '\0'; | |
28ef6c31 | 605 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
606 | } |
607 | ||
bb70624e JA |
608 | #define CHECK_INV_LBREAKS() \ |
609 | do { \ | |
610 | if (newlines >= (inv_lbsize - 2)) \ | |
611 | { \ | |
612 | inv_lbsize *= 2; \ | |
613 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
614 | } \ | |
615 | } while (0) | |
7117c2d2 JA |
616 | |
617 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
618 | #define CHECK_LPOS() \ |
619 | do { \ | |
b72432fd | 620 | lpos++; \ |
28ef6c31 | 621 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 622 | { \ |
bb70624e JA |
623 | if (newlines >= (inv_lbsize - 2)) \ |
624 | { \ | |
625 | inv_lbsize *= 2; \ | |
626 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
627 | } \ | |
b72432fd | 628 | inv_lbreaks[++newlines] = out; \ |
d3ad40de CR |
629 | if (newlines >= (line_state_invisible->wbsize - 1)) \ |
630 | { \ | |
631 | line_state_invisible->wbsize *= 2; \ | |
632 | line_state_invisible->wrapped_line = (int *)xrealloc (line_state_invisible->wrapped_line, line_state_invisible->wbsize * sizeof(int)); \ | |
633 | } \ | |
634 | line_state_invisible->wrapped_line[newlines] = _rl_wrapped_multicolumn; \ | |
b72432fd JA |
635 | lpos = 0; \ |
636 | } \ | |
ccc6cda3 | 637 | } while (0) |
7117c2d2 JA |
638 | #else |
639 | #define CHECK_LPOS() \ | |
640 | do { \ | |
641 | lpos++; \ | |
642 | if (lpos >= _rl_screenwidth) \ | |
643 | { \ | |
644 | if (newlines >= (inv_lbsize - 2)) \ | |
645 | { \ | |
646 | inv_lbsize *= 2; \ | |
647 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
648 | } \ | |
649 | inv_lbreaks[++newlines] = out; \ | |
650 | lpos = 0; \ | |
651 | } \ | |
652 | } while (0) | |
653 | #endif | |
ccc6cda3 JA |
654 | |
655 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
656 | inv_lbreaks[newlines = 0] = 0; | |
43cdcad8 | 657 | lpos = prompt_physical_chars + modmark; |
43cdcad8 | 658 | |
7117c2d2 | 659 | #if defined (HANDLE_MULTIBYTE) |
d3ad40de | 660 | memset (line_state_invisible->wrapped_line, 0, line_state_invisible->wbsize * sizeof (int)); |
37c41ab1 | 661 | num = 0; |
7117c2d2 | 662 | #endif |
d166f048 | 663 | |
28ef6c31 JA |
664 | /* prompt_invis_chars_first_line is the number of invisible characters in |
665 | the first physical line of the prompt. | |
666 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
57a3f689 CR |
667 | chars on the second (or, more generally, last) line. */ |
668 | ||
669 | /* This is zero-based, used to set the newlines */ | |
670 | prompt_lines_estimate = lpos / _rl_screenwidth; | |
28ef6c31 JA |
671 | |
672 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 673 | contents of the command line? */ |
28ef6c31 | 674 | while (lpos >= _rl_screenwidth) |
d166f048 | 675 | { |
d3ad40de | 676 | int z; |
28ef6c31 JA |
677 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
678 | invisible characters that is longer than the screen width. The | |
679 | prompt_invis_chars_first_line variable could be made into an array | |
680 | saying how many invisible characters there are per line, but that's | |
681 | probably too much work for the benefit gained. How many people have | |
545f34cf CR |
682 | prompts that exceed two physical lines? |
683 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
37c41ab1 | 684 | #if defined (HANDLE_MULTIBYTE) |
33fe8777 | 685 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) |
37c41ab1 | 686 | { |
d3ad40de CR |
687 | n0 = num; |
688 | temp = local_prompt_len; | |
689 | while (num < temp) | |
37c41ab1 | 690 | { |
d3ad40de CR |
691 | z = _rl_col_width (local_prompt, n0, num); |
692 | if (z > _rl_screenwidth) | |
693 | { | |
694 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
695 | break; | |
696 | } | |
697 | else if (z == _rl_screenwidth) | |
698 | break; | |
699 | num++; | |
37c41ab1 | 700 | } |
d3ad40de | 701 | temp = num; |
37c41ab1 | 702 | } |
d3ad40de | 703 | else |
37c41ab1 | 704 | #endif /* !HANDLE_MULTIBYTE */ |
d3ad40de CR |
705 | temp = ((newlines + 1) * _rl_screenwidth); |
706 | ||
707 | /* Now account for invisible characters in the current line. */ | |
57a3f689 CR |
708 | /* XXX - this assumes that the invisible characters may be split, but only |
709 | between the first and the last lines. */ | |
d3ad40de | 710 | temp += ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line |
57a3f689 CR |
711 | : ((newlines == prompt_lines_estimate) ? wrap_offset : prompt_invis_chars_first_line)) |
712 | : ((newlines == 0) ? wrap_offset : 0)); | |
545f34cf | 713 | |
d166f048 | 714 | inv_lbreaks[++newlines] = temp; |
37c41ab1 | 715 | #if defined (HANDLE_MULTIBYTE) |
33fe8777 | 716 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) |
d3ad40de CR |
717 | lpos -= _rl_col_width (local_prompt, n0, num); |
718 | else | |
37c41ab1 | 719 | #endif |
d3ad40de | 720 | lpos -= _rl_screenwidth; |
d166f048 | 721 | } |
ccc6cda3 | 722 | |
28ef6c31 JA |
723 | prompt_last_screen_line = newlines; |
724 | ||
725 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
d3ad40de | 726 | track of where the cursor is (cpos_buffer_position), the number of the line containing |
28ef6c31 JA |
727 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
728 | It maintains an array of line breaks for display (inv_lbreaks). | |
729 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 730 | lb_linenum = 0; |
7117c2d2 JA |
731 | #if defined (HANDLE_MULTIBYTE) |
732 | in = 0; | |
733 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
734 | { | |
735 | memset (&ps, 0, sizeof (mbstate_t)); | |
736 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
737 | } | |
738 | else | |
739 | wc_bytes = 1; | |
740 | while (in < rl_end) | |
741 | #else | |
d166f048 | 742 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 743 | #endif |
726f6388 JA |
744 | { |
745 | c = (unsigned char)rl_line_buffer[in]; | |
746 | ||
7117c2d2 JA |
747 | #if defined (HANDLE_MULTIBYTE) |
748 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
749 | { | |
d3a24ed2 | 750 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
751 | { |
752 | /* Byte sequence is invalid or shortened. Assume that the | |
753 | first byte represents a character. */ | |
754 | wc_bytes = 1; | |
755 | /* Assume that a character occupies a single column. */ | |
756 | wc_width = 1; | |
757 | memset (&ps, 0, sizeof (mbstate_t)); | |
758 | } | |
d3a24ed2 | 759 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
760 | break; /* Found '\0' */ |
761 | else | |
762 | { | |
763 | temp = wcwidth (wc); | |
d3a24ed2 | 764 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
765 | } |
766 | } | |
767 | #endif | |
768 | ||
726f6388 JA |
769 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
770 | { | |
771 | line_size *= 2; | |
f73dda09 JA |
772 | visible_line = (char *)xrealloc (visible_line, line_size); |
773 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
774 | line = invisible_line; |
775 | } | |
776 | ||
777 | if (in == rl_point) | |
ccc6cda3 | 778 | { |
d3ad40de | 779 | cpos_buffer_position = out; |
ccc6cda3 JA |
780 | lb_linenum = newlines; |
781 | } | |
726f6388 | 782 | |
7117c2d2 JA |
783 | #if defined (HANDLE_MULTIBYTE) |
784 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
785 | #else | |
726f6388 | 786 | if (META_CHAR (c)) |
7117c2d2 | 787 | #endif |
726f6388 JA |
788 | { |
789 | if (_rl_output_meta_chars == 0) | |
790 | { | |
791 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 792 | |
28ef6c31 | 793 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 794 | { |
28ef6c31 | 795 | temp = _rl_screenwidth - lpos; |
bb70624e | 796 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
797 | inv_lbreaks[++newlines] = out + temp; |
798 | lpos = 4 - temp; | |
799 | } | |
800 | else | |
801 | lpos += 4; | |
802 | ||
726f6388 JA |
803 | out += 4; |
804 | } | |
805 | else | |
ccc6cda3 JA |
806 | { |
807 | line[out++] = c; | |
808 | CHECK_LPOS(); | |
809 | } | |
726f6388 JA |
810 | } |
811 | #if defined (DISPLAY_TABS) | |
812 | else if (c == '\t') | |
813 | { | |
28ef6c31 | 814 | register int newout; |
b72432fd JA |
815 | |
816 | #if 0 | |
ccc6cda3 | 817 | newout = (out | (int)7) + 1; |
b72432fd JA |
818 | #else |
819 | newout = out + 8 - lpos % 8; | |
820 | #endif | |
ccc6cda3 | 821 | temp = newout - out; |
28ef6c31 | 822 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
823 | { |
824 | register int temp2; | |
28ef6c31 | 825 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 826 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
827 | inv_lbreaks[++newlines] = out + temp2; |
828 | lpos = temp - temp2; | |
829 | while (out < newout) | |
830 | line[out++] = ' '; | |
831 | } | |
832 | else | |
833 | { | |
834 | while (out < newout) | |
835 | line[out++] = ' '; | |
836 | lpos += temp; | |
837 | } | |
726f6388 JA |
838 | } |
839 | #endif | |
28ef6c31 | 840 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
841 | { |
842 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 843 | CHECK_INV_LBREAKS (); |
b72432fd JA |
844 | inv_lbreaks[++newlines] = out; |
845 | lpos = 0; | |
846 | } | |
ccc6cda3 | 847 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
848 | { |
849 | line[out++] = '^'; | |
ccc6cda3 JA |
850 | CHECK_LPOS(); |
851 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
852 | CHECK_LPOS(); | |
726f6388 | 853 | } |
ccc6cda3 | 854 | else |
726f6388 | 855 | { |
7117c2d2 JA |
856 | #if defined (HANDLE_MULTIBYTE) |
857 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
858 | { | |
859 | register int i; | |
860 | ||
861 | _rl_wrapped_multicolumn = 0; | |
862 | ||
863 | if (_rl_screenwidth < lpos + wc_width) | |
864 | for (i = lpos; i < _rl_screenwidth; i++) | |
865 | { | |
866 | /* The space will be removed in update_line() */ | |
867 | line[out++] = ' '; | |
868 | _rl_wrapped_multicolumn++; | |
869 | CHECK_LPOS(); | |
870 | } | |
871 | if (in == rl_point) | |
872 | { | |
d3ad40de | 873 | cpos_buffer_position = out; |
7117c2d2 JA |
874 | lb_linenum = newlines; |
875 | } | |
876 | for (i = in; i < in+wc_bytes; i++) | |
877 | line[out++] = rl_line_buffer[i]; | |
878 | for (i = 0; i < wc_width; i++) | |
879 | CHECK_LPOS(); | |
880 | } | |
881 | else | |
882 | { | |
883 | line[out++] = c; | |
884 | CHECK_LPOS(); | |
885 | } | |
886 | #else | |
ccc6cda3 JA |
887 | line[out++] = c; |
888 | CHECK_LPOS(); | |
7117c2d2 JA |
889 | #endif |
890 | } | |
891 | ||
892 | #if defined (HANDLE_MULTIBYTE) | |
893 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
894 | { | |
895 | in += wc_bytes; | |
896 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
726f6388 | 897 | } |
7117c2d2 JA |
898 | else |
899 | in++; | |
900 | #endif | |
901 | ||
726f6388 JA |
902 | } |
903 | line[out] = '\0'; | |
d3ad40de | 904 | if (cpos_buffer_position < 0) |
ccc6cda3 | 905 | { |
d3ad40de | 906 | cpos_buffer_position = out; |
ccc6cda3 JA |
907 | lb_linenum = newlines; |
908 | } | |
909 | ||
910 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 911 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
912 | inv_lbreaks[newlines+1] = out; |
913 | cursor_linenum = lb_linenum; | |
726f6388 | 914 | |
d3ad40de | 915 | /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed. |
28ef6c31 | 916 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
726f6388 JA |
917 | |
918 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
919 | line buffers are really multiple lines, which would wrap every | |
920 | (screenwidth - 1) characters. Go through each in turn, finding | |
921 | the changed region and updating it. The line order is top to bottom. */ | |
922 | ||
923 | /* If we can move the cursor up and down, then use multiple lines, | |
924 | otherwise, let long lines display in a single terminal line, and | |
925 | horizontally scroll it. */ | |
926 | ||
28ef6c31 | 927 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 928 | { |
28089d04 | 929 | int nleft, pos, changed_screen_line, tx; |
726f6388 JA |
930 | |
931 | if (!rl_display_fixed || forced_display) | |
932 | { | |
933 | forced_display = 0; | |
934 | ||
935 | /* If we have more than a screenful of material to display, then | |
936 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 937 | not the first. */ |
28ef6c31 | 938 | if (out >= _rl_screenchars) |
7117c2d2 JA |
939 | { |
940 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
941 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
942 | else | |
943 | out = _rl_screenchars - 1; | |
944 | } | |
726f6388 JA |
945 | |
946 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
947 | second and subsequent lines start at inv_lbreaks[N], offset by |
948 | OFFSET (which has already been calculated above). */ | |
726f6388 | 949 | |
866961ad | 950 | #define INVIS_FIRST() (prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset) |
234d8729 | 951 | #define WRAP_OFFSET(line, offset) ((line == 0) \ |
866961ad | 952 | ? (offset ? INVIS_FIRST() : 0) \ |
234d8729 | 953 | : ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0)) |
726f6388 | 954 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) |
ccc6cda3 JA |
955 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
956 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
957 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 958 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 959 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 JA |
960 | |
961 | /* For each line in the buffer, do the updating display. */ | |
962 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
963 | { | |
d3ad40de CR |
964 | /* This can lead us astray if we execute a program that changes |
965 | the locale from a non-multibyte to a multibyte one. */ | |
28089d04 | 966 | o_cpos = _rl_last_c_pos; |
5c26afb8 | 967 | cpos_adjusted = 0; |
726f6388 | 968 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
ccc6cda3 | 969 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 | 970 | |
28089d04 CR |
971 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
972 | take invisible characters into account, since _rl_last_c_pos | |
973 | is an absolute cursor position in a multibyte locale. See | |
974 | if compensating here is the right thing, or if we have to | |
57a3f689 | 975 | change update_line itself. There are several cases in which |
5c26afb8 CR |
976 | update_line adjusts _rl_last_c_pos itself (so it can pass |
977 | _rl_move_cursor_relative accurate values); it communicates | |
d3ad40de CR |
978 | this back by setting cpos_adjusted. If we assume that |
979 | _rl_last_c_pos is correct (an absolute cursor position) each | |
980 | time update_line is called, then we can assume in our | |
981 | calculations that o_cpos does not need to be adjusted by | |
982 | wrap_offset. */ | |
28089d04 | 983 | if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
5c26afb8 | 984 | cpos_adjusted == 0 && |
28089d04 CR |
985 | _rl_last_c_pos != o_cpos && |
986 | _rl_last_c_pos > wrap_offset && | |
3969cd96 | 987 | o_cpos < prompt_last_invisible) |
33fe8777 | 988 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ |
234d8729 CR |
989 | else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth && |
990 | (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && | |
991 | cpos_adjusted == 0 && | |
992 | _rl_last_c_pos != o_cpos && | |
33fe8777 | 993 | _rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line)) |
234d8729 | 994 | _rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line); |
28089d04 | 995 | |
726f6388 JA |
996 | /* If this is the line with the prompt, we might need to |
997 | compensate for invisible characters in the new line. Do | |
998 | this only if there is not more than one new line (which | |
999 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
1000 | and the new line is shorter than the old. Make sure we are |
1001 | at the end of the new line before clearing. */ | |
726f6388 | 1002 | if (linenum == 0 && |
ccc6cda3 | 1003 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
1004 | (wrap_offset > visible_wrap_offset) && |
1005 | (_rl_last_c_pos < visible_first_line_len)) | |
1006 | { | |
177d51f7 CR |
1007 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1008 | nleft = _rl_screenwidth - _rl_last_c_pos; | |
1009 | else | |
1010 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
726f6388 | 1011 | if (nleft) |
d166f048 | 1012 | _rl_clear_to_eol (nleft); |
726f6388 | 1013 | } |
234d8729 CR |
1014 | #if 0 |
1015 | /* This segment is intended to handle the case where the prompt | |
1016 | has invisible characters on the second line and the new line | |
1017 | to be displayed needs to clear the rest of the old characters | |
1018 | out (e.g., when printing the i-search prompt). In general, | |
1019 | the case of the new line being shorter than the old. | |
1020 | Incomplete */ | |
1021 | else if (linenum == prompt_last_screen_line && | |
1022 | prompt_physical_chars > _rl_screenwidth && | |
1023 | wrap_offset != prompt_invis_chars_first_line && | |
1024 | _rl_last_c_pos == out && | |
1025 | #endif | |
1026 | ||
726f6388 JA |
1027 | |
1028 | /* Since the new first line is now visible, save its length. */ | |
1029 | if (linenum == 0) | |
ccc6cda3 | 1030 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
1031 | } |
1032 | ||
1033 | /* We may have deleted some lines. If so, clear the left over | |
1034 | blank ones at the bottom out. */ | |
1035 | if (_rl_vis_botlin > inv_botlin) | |
1036 | { | |
1037 | char *tt; | |
1038 | for (; linenum <= _rl_vis_botlin; linenum++) | |
1039 | { | |
1040 | tt = VIS_CHARS (linenum); | |
1041 | _rl_move_vert (linenum); | |
1042 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 1043 | _rl_clear_to_eol |
28ef6c31 | 1044 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
1045 | } |
1046 | } | |
1047 | _rl_vis_botlin = inv_botlin; | |
1048 | ||
726f6388 JA |
1049 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
1050 | different screen line during this redisplay. */ | |
1051 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
1052 | if (changed_screen_line) | |
1053 | { | |
1054 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 1055 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
1056 | the physical cursor position on the screen stays the same, |
1057 | but the buffer position needs to be adjusted to account | |
1058 | for invisible characters. */ | |
6bf74e5a | 1059 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
b72432fd | 1060 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
1061 | } |
1062 | ||
1063 | /* We have to reprint the prompt if it contains invisible | |
1064 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
1065 | the characters from the current cursor position. But we |
1066 | only need to reprint it if the cursor is before the last | |
1067 | invisible character in the prompt string. */ | |
28ef6c31 | 1068 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1069 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
2abb7255 | 1070 | #if 0 |
ac18b312 | 1071 | _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt) |
2abb7255 CR |
1072 | #else |
1073 | _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt) | |
1074 | #endif | |
726f6388 | 1075 | { |
bb70624e JA |
1076 | #if defined (__MSDOS__) |
1077 | putc ('\r', rl_outstream); | |
1078 | #else | |
28ef6c31 JA |
1079 | if (_rl_term_cr) |
1080 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 1081 | #endif |
d3ad40de CR |
1082 | if (modmark) |
1083 | _rl_output_some_chars ("*", 1); | |
1084 | ||
726f6388 | 1085 | _rl_output_some_chars (local_prompt, nleft); |
7117c2d2 | 1086 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
d3ad40de | 1087 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft) - wrap_offset + modmark; |
7117c2d2 | 1088 | else |
d3ad40de | 1089 | _rl_last_c_pos = nleft + modmark; |
726f6388 JA |
1090 | } |
1091 | ||
1092 | /* Where on that line? And where does that line start | |
1093 | in the buffer? */ | |
ccc6cda3 | 1094 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 | 1095 | /* nleft == number of characters in the line buffer between the |
d3ad40de CR |
1096 | start of the line and the desired cursor position. */ |
1097 | nleft = cpos_buffer_position - pos; | |
726f6388 | 1098 | |
6bf74e5a CR |
1099 | /* NLEFT is now a number of characters in a buffer. When in a |
1100 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
1101 | position that doesn't take invisible characters in the prompt | |
1102 | into account. We use a fudge factor to compensate. */ | |
6bf74e5a | 1103 | |
ccc6cda3 | 1104 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 1105 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 1106 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
1107 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
1108 | { | |
d3ad40de | 1109 | /* TX == new physical cursor position in multibyte locale. */ |
7117c2d2 | 1110 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
28089d04 | 1111 | tx = _rl_col_width (&visible_line[pos], 0, nleft) - visible_wrap_offset; |
7117c2d2 | 1112 | else |
177d51f7 | 1113 | tx = nleft; |
3d4e09aa | 1114 | if (tx >= 0 && _rl_last_c_pos > tx) |
d11b8b46 | 1115 | { |
28089d04 | 1116 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ |
d11b8b46 CR |
1117 | _rl_last_c_pos = tx; |
1118 | } | |
726f6388 JA |
1119 | } |
1120 | ||
28089d04 CR |
1121 | /* We need to note that in a multibyte locale we are dealing with |
1122 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1123 | point specified by a buffer position (NLEFT) that doesn't take | |
1124 | invisible characters into account. */ | |
7117c2d2 JA |
1125 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1126 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
1127 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
1128 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1129 | } | |
1130 | } | |
1131 | else /* Do horizontal scrolling. */ | |
1132 | { | |
1133 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1134 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1135 | ||
1136 | /* Always at top line. */ | |
1137 | _rl_last_v_pos = 0; | |
1138 | ||
1139 | /* Compute where in the buffer the displayed line should start. This | |
1140 | will be LMARGIN. */ | |
1141 | ||
1142 | /* The number of characters that will be displayed before the cursor. */ | |
d3ad40de | 1143 | ndisp = cpos_buffer_position - wrap_offset; |
28ef6c31 | 1144 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1145 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 1146 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
d3ad40de | 1147 | phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 1148 | t = _rl_screenwidth / 3; |
726f6388 JA |
1149 | |
1150 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 1151 | last_lmargin will be > 0. */ |
726f6388 JA |
1152 | |
1153 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
1154 | width, compute the starting offset so that the cursor is about |
1155 | two-thirds of the way across the screen. */ | |
28ef6c31 | 1156 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 | 1157 | { |
d3ad40de | 1158 | lmargin = cpos_buffer_position - (2 * t); |
726f6388 JA |
1159 | if (lmargin < 0) |
1160 | lmargin = 0; | |
1161 | /* If the left margin would be in the middle of a prompt with | |
1162 | invisible characters, don't display the prompt at all. */ | |
1163 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1164 | lmargin = nleft; | |
1165 | } | |
28ef6c31 | 1166 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1167 | lmargin = 0; |
726f6388 JA |
1168 | else if (phys_c_pos < 1) |
1169 | { | |
1170 | /* If we are moving back towards the beginning of the line and | |
1171 | the last margin is no longer correct, compute a new one. */ | |
d3ad40de | 1172 | lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */ |
726f6388 JA |
1173 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
1174 | lmargin = nleft; | |
1175 | } | |
1176 | else | |
b72432fd | 1177 | lmargin = last_lmargin; |
726f6388 JA |
1178 | |
1179 | /* If the first character on the screen isn't the first character | |
1180 | in the display line, indicate this with a special character. */ | |
1181 | if (lmargin > 0) | |
1182 | line[lmargin] = '<'; | |
1183 | ||
1184 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1185 | the whole line, indicate that with a special character at the |
1186 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1187 | wrap offset into account. */ | |
28ef6c31 | 1188 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1189 | if (t < out) |
b72432fd | 1190 | line[t - 1] = '>'; |
726f6388 JA |
1191 | |
1192 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
1193 | { | |
1194 | forced_display = 0; | |
1195 | update_line (&visible_line[last_lmargin], | |
1196 | &invisible_line[lmargin], | |
1197 | 0, | |
28ef6c31 JA |
1198 | _rl_screenwidth + visible_wrap_offset, |
1199 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1200 | 0); |
1201 | ||
1202 | /* If the visible new line is shorter than the old, but the number | |
1203 | of invisible characters is greater, and we are at the end of | |
1204 | the new line, we need to clear to eol. */ | |
1205 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1206 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
1207 | (_rl_last_c_pos == out) && | |
1208 | t < visible_first_line_len) | |
1209 | { | |
28ef6c31 | 1210 | nleft = _rl_screenwidth - t; |
d166f048 | 1211 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1212 | } |
1213 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1214 | if (visible_first_line_len > _rl_screenwidth) |
1215 | visible_first_line_len = _rl_screenwidth; | |
726f6388 | 1216 | |
d3ad40de | 1217 | _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]); |
726f6388 JA |
1218 | last_lmargin = lmargin; |
1219 | } | |
1220 | } | |
1221 | fflush (rl_outstream); | |
1222 | ||
1223 | /* Swap visible and non-visible lines. */ | |
1224 | { | |
d3ad40de | 1225 | struct line_state *vtemp = line_state_visible; |
bb70624e | 1226 | |
d3ad40de CR |
1227 | line_state_visible = line_state_invisible; |
1228 | line_state_invisible = vtemp; | |
bb70624e | 1229 | |
726f6388 JA |
1230 | rl_display_fixed = 0; |
1231 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1232 | are not displaying any invisible characters, so set visible_wrap_offset | |
1233 | to 0. */ | |
1234 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1235 | visible_wrap_offset = 0; | |
1236 | else | |
1237 | visible_wrap_offset = wrap_offset; | |
1238 | } | |
d356441f CR |
1239 | |
1240 | _rl_release_sigint (); | |
0d8616ff | 1241 | _rl_release_sigwinch (); |
726f6388 JA |
1242 | } |
1243 | ||
1244 | /* PWP: update_line() is based on finding the middle difference of each | |
1245 | line on the screen; vis: | |
1246 | ||
1247 | /old first difference | |
1248 | /beginning of line | /old last same /old EOL | |
1249 | v v v v | |
1250 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1251 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1252 | ^ ^ ^ ^ | |
1253 | \beginning of line | \new last same \new end of line | |
1254 | \new first difference | |
1255 | ||
1256 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1257 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1258 | |
1259 | Could be made even smarter, but this works well enough */ | |
1260 | static void | |
1261 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1262 | register char *old, *new; | |
ccc6cda3 | 1263 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1264 | { |
1265 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
3d4e09aa | 1266 | int temp, lendiff, wsatend, od, nd, twidth, o_cpos; |
ccc6cda3 | 1267 | int current_invis_chars; |
7117c2d2 JA |
1268 | int col_lendiff, col_temp; |
1269 | #if defined (HANDLE_MULTIBYTE) | |
1270 | mbstate_t ps_new, ps_old; | |
dc8fbaf9 | 1271 | int new_offset, old_offset; |
7117c2d2 | 1272 | #endif |
726f6388 JA |
1273 | |
1274 | /* If we're at the right edge of a terminal that supports xn, we're | |
1275 | ready to wrap around, so do so. This fixes problems with knowing | |
1276 | the exact cursor position and cut-and-paste with certain terminal | |
1277 | emulators. In this calculation, TEMP is the physical screen | |
1278 | position of the cursor. */ | |
177d51f7 CR |
1279 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1280 | temp = _rl_last_c_pos; | |
1281 | else | |
234d8729 | 1282 | temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset); |
28ef6c31 | 1283 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1284 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1285 | { |
7117c2d2 JA |
1286 | #if defined (HANDLE_MULTIBYTE) |
1287 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1288 | { | |
1289 | wchar_t wc; | |
1290 | mbstate_t ps; | |
1291 | int tempwidth, bytes; | |
1292 | size_t ret; | |
1293 | ||
1294 | /* This fixes only double-column characters, but if the wrapped | |
1295 | character comsumes more than three columns, spaces will be | |
1296 | inserted in the string buffer. */ | |
d3ad40de CR |
1297 | if (current_line < line_state_visible->wbsize && line_state_visible->wrapped_line[current_line] > 0) |
1298 | _rl_clear_to_eol (line_state_visible->wrapped_line[current_line]); | |
7117c2d2 JA |
1299 | |
1300 | memset (&ps, 0, sizeof (mbstate_t)); | |
1301 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
d3a24ed2 | 1302 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1303 | { |
1304 | tempwidth = 1; | |
1305 | ret = 1; | |
1306 | } | |
d3a24ed2 | 1307 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1308 | tempwidth = 0; |
1309 | else | |
1310 | tempwidth = wcwidth (wc); | |
1311 | ||
1312 | if (tempwidth > 0) | |
1313 | { | |
1314 | int count; | |
1315 | bytes = ret; | |
1316 | for (count = 0; count < bytes; count++) | |
1317 | putc (new[count], rl_outstream); | |
1318 | _rl_last_c_pos = tempwidth; | |
1319 | _rl_last_v_pos++; | |
1320 | memset (&ps, 0, sizeof (mbstate_t)); | |
1321 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1322 | if (ret != 0 && bytes != 0) | |
1323 | { | |
d3a24ed2 | 1324 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1325 | memmove (old+bytes, old+1, strlen (old+1)); |
1326 | else | |
1327 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1328 | memcpy (old, new, bytes); | |
1329 | } | |
1330 | } | |
1331 | else | |
1332 | { | |
1333 | putc (' ', rl_outstream); | |
1334 | _rl_last_c_pos = 1; | |
1335 | _rl_last_v_pos++; | |
1336 | if (old[0] && new[0]) | |
1337 | old[0] = new[0]; | |
1338 | } | |
1339 | } | |
726f6388 | 1340 | else |
7117c2d2 JA |
1341 | #endif |
1342 | { | |
1343 | if (new[0]) | |
1344 | putc (new[0], rl_outstream); | |
1345 | else | |
1346 | putc (' ', rl_outstream); | |
5c26afb8 | 1347 | _rl_last_c_pos = 1; |
7117c2d2 JA |
1348 | _rl_last_v_pos++; |
1349 | if (old[0] && new[0]) | |
1350 | old[0] = new[0]; | |
1351 | } | |
726f6388 | 1352 | } |
7117c2d2 | 1353 | |
726f6388 JA |
1354 | |
1355 | /* Find first difference. */ | |
7117c2d2 JA |
1356 | #if defined (HANDLE_MULTIBYTE) |
1357 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1358 | { | |
5e13499c CR |
1359 | /* See if the old line is a subset of the new line, so that the |
1360 | only change is adding characters. */ | |
1361 | temp = (omax < nmax) ? omax : nmax; | |
d3ad40de | 1362 | if (memcmp (old, new, temp) == 0) /* adding at the end */ |
7117c2d2 | 1363 | { |
5e13499c CR |
1364 | ofd = old + temp; |
1365 | nfd = new + temp; | |
d3a24ed2 CR |
1366 | } |
1367 | else | |
5e13499c CR |
1368 | { |
1369 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1370 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1371 | ||
1372 | if (omax == nmax && STREQN (new, old, omax)) | |
d3a24ed2 | 1373 | { |
5e13499c CR |
1374 | ofd = old + omax; |
1375 | nfd = new + nmax; | |
1376 | } | |
1377 | else | |
1378 | { | |
1379 | new_offset = old_offset = 0; | |
1380 | for (ofd = old, nfd = new; | |
1381 | (ofd - old < omax) && *ofd && | |
1382 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1383 | { | |
1384 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1385 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1386 | ofd = old + old_offset; | |
1387 | nfd = new + new_offset; | |
1388 | } | |
d3a24ed2 | 1389 | } |
7117c2d2 JA |
1390 | } |
1391 | } | |
1392 | else | |
1393 | #endif | |
726f6388 JA |
1394 | for (ofd = old, nfd = new; |
1395 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1396 | ofd++, nfd++) | |
1397 | ; | |
1398 | ||
1399 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1400 | of the distance between ne and new and oe and old, respectively, to | |
1401 | move a subtraction out of each loop. */ | |
1402 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1403 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1404 | ||
1405 | /* If no difference, continue to next line. */ | |
1406 | if (ofd == oe && nfd == ne) | |
1407 | return; | |
1408 | ||
1409 | wsatend = 1; /* flag for trailing whitespace */ | |
7117c2d2 JA |
1410 | |
1411 | #if defined (HANDLE_MULTIBYTE) | |
1412 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1413 | { | |
1414 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1415 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1416 | while ((ols > ofd) && (nls > nfd)) | |
1417 | { | |
1418 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1419 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1420 | ||
d3a24ed2 CR |
1421 | #if 0 |
1422 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1423 | _rl_adjust_point (old, ols - old, &ps_old); |
1424 | _rl_adjust_point (new, nls - new, &ps_new); | |
d3a24ed2 | 1425 | #endif |
7117c2d2 JA |
1426 | |
1427 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1428 | break; | |
1429 | ||
1430 | if (*ols == ' ') | |
1431 | wsatend = 0; | |
1432 | ||
1433 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1434 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1435 | } | |
1436 | } | |
1437 | else | |
1438 | { | |
1439 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1440 | ols = oe - 1; /* find last same */ |
1441 | nls = ne - 1; | |
1442 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1443 | { | |
1444 | if (*ols != ' ') | |
1445 | wsatend = 0; | |
1446 | ols--; | |
1447 | nls--; | |
1448 | } | |
7117c2d2 JA |
1449 | #if defined (HANDLE_MULTIBYTE) |
1450 | } | |
1451 | #endif | |
726f6388 JA |
1452 | |
1453 | if (wsatend) | |
1454 | { | |
1455 | ols = oe; | |
1456 | nls = ne; | |
1457 | } | |
7117c2d2 JA |
1458 | #if defined (HANDLE_MULTIBYTE) |
1459 | /* This may not work for stateful encoding, but who cares? To handle | |
1460 | stateful encoding properly, we have to scan each string from the | |
1461 | beginning and compare. */ | |
1462 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1463 | #else | |
726f6388 | 1464 | else if (*ols != *nls) |
7117c2d2 | 1465 | #endif |
726f6388 JA |
1466 | { |
1467 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 JA |
1468 | { |
1469 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1470 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1471 | else | |
1472 | ols++; | |
1473 | } | |
726f6388 | 1474 | if (*nls) |
7117c2d2 JA |
1475 | { |
1476 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1477 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1478 | else | |
1479 | nls++; | |
1480 | } | |
726f6388 JA |
1481 | } |
1482 | ||
ccc6cda3 JA |
1483 | /* count of invisible characters in the current invisible line. */ |
1484 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1485 | if (_rl_last_v_pos != current_line) | |
1486 | { | |
1487 | _rl_move_vert (current_line); | |
177d51f7 | 1488 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
ccc6cda3 JA |
1489 | _rl_last_c_pos += visible_wrap_offset; |
1490 | } | |
726f6388 JA |
1491 | |
1492 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1493 | prompt string, and the prompt string has not changed, and the current |
1494 | cursor position is before the last invisible character in the prompt, | |
1495 | and the index of the character to move to is past the end of the prompt | |
1496 | string, then redraw the entire prompt string. We can only do this | |
1497 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1498 | |
ccc6cda3 JA |
1499 | This is not an efficiency hack -- there is a problem with redrawing |
1500 | portions of the prompt string if they contain terminal escape | |
1501 | sequences (like drawing the `unbold' sequence without a corresponding | |
1502 | `bold') that manifests itself on certain terminals. */ | |
726f6388 | 1503 | |
d3ad40de | 1504 | lendiff = local_prompt_len; |
ccc6cda3 | 1505 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 1506 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 | 1507 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
d3ad40de | 1508 | od >= lendiff && _rl_last_c_pos < PROMPT_ENDING_INDEX) |
726f6388 | 1509 | { |
bb70624e JA |
1510 | #if defined (__MSDOS__) |
1511 | putc ('\r', rl_outstream); | |
1512 | #else | |
28ef6c31 | 1513 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1514 | #endif |
d3ad40de CR |
1515 | if (modmark) |
1516 | _rl_output_some_chars ("*", 1); | |
726f6388 | 1517 | _rl_output_some_chars (local_prompt, lendiff); |
7117c2d2 | 1518 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
5c26afb8 CR |
1519 | { |
1520 | /* We take wrap_offset into account here so we can pass correct | |
1521 | information to _rl_move_cursor_relative. */ | |
d3ad40de | 1522 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff) - wrap_offset + modmark; |
5c26afb8 CR |
1523 | cpos_adjusted = 1; |
1524 | } | |
7117c2d2 | 1525 | else |
d3ad40de | 1526 | _rl_last_c_pos = lendiff + modmark; |
726f6388 JA |
1527 | } |
1528 | ||
3d4e09aa CR |
1529 | o_cpos = _rl_last_c_pos; |
1530 | ||
d3ad40de CR |
1531 | /* When this function returns, _rl_last_c_pos is correct, and an absolute |
1532 | cursor postion in multibyte mode, but a buffer index when not in a | |
1533 | multibyte locale. */ | |
ccc6cda3 | 1534 | _rl_move_cursor_relative (od, old); |
d3ad40de CR |
1535 | #if 1 |
1536 | #if defined (HANDLE_MULTIBYTE) | |
1537 | /* We need to indicate that the cursor position is correct in the presence of | |
1538 | invisible characters in the prompt string. Let's see if setting this when | |
1539 | we make sure we're at the end of the drawn prompt string works. */ | |
3d4e09aa CR |
1540 | if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 && |
1541 | (_rl_last_c_pos > 0 || o_cpos > 0) && | |
1542 | _rl_last_c_pos == prompt_physical_chars) | |
d3ad40de CR |
1543 | cpos_adjusted = 1; |
1544 | #endif | |
1545 | #endif | |
726f6388 | 1546 | |
7117c2d2 JA |
1547 | /* if (len (new) > len (old)) |
1548 | lendiff == difference in buffer | |
1549 | col_lendiff == difference on screen | |
1550 | When not using multibyte characters, these are equal */ | |
726f6388 | 1551 | lendiff = (nls - nfd) - (ols - ofd); |
7117c2d2 JA |
1552 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1553 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1554 | else | |
1555 | col_lendiff = lendiff; | |
726f6388 | 1556 | |
ccc6cda3 JA |
1557 | /* If we are changing the number of invisible characters in a line, and |
1558 | the spot of first difference is before the end of the invisible chars, | |
1559 | lendiff needs to be adjusted. */ | |
1560 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1561 | current_invis_chars != visible_wrap_offset) | |
7117c2d2 JA |
1562 | { |
1563 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1564 | { | |
1565 | lendiff += visible_wrap_offset - current_invis_chars; | |
1566 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1567 | } | |
1568 | else | |
1569 | { | |
1570 | lendiff += visible_wrap_offset - current_invis_chars; | |
1571 | col_lendiff = lendiff; | |
1572 | } | |
1573 | } | |
ccc6cda3 | 1574 | |
726f6388 JA |
1575 | /* Insert (diff (len (old), len (new)) ch. */ |
1576 | temp = ne - nfd; | |
7117c2d2 JA |
1577 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1578 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1579 | else | |
1580 | col_temp = temp; | |
1581 | ||
1582 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
726f6388 JA |
1583 | { |
1584 | /* Non-zero if we're increasing the number of lines. */ | |
1585 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
b0c16657 CR |
1586 | /* If col_lendiff is > 0, implying that the new string takes up more |
1587 | screen real estate than the old, but lendiff is < 0, meaning that it | |
1588 | takes fewer bytes, we need to just output the characters starting | |
1589 | from the first difference. These will overwrite what is on the | |
1590 | display, so there's no reason to do a smart update. This can really | |
1591 | only happen in a multibyte environment. */ | |
1592 | if (lendiff < 0) | |
1593 | { | |
1594 | _rl_output_some_chars (nfd, temp); | |
1595 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp); | |
1596 | /* If nfd begins before any invisible characters in the prompt, | |
1597 | adjust _rl_last_c_pos to account for wrap_offset and set | |
1598 | cpos_adjusted to let the caller know. */ | |
1599 | if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
1600 | { | |
1601 | _rl_last_c_pos -= wrap_offset; | |
1602 | cpos_adjusted = 1; | |
1603 | } | |
1604 | return; | |
1605 | } | |
726f6388 JA |
1606 | /* Sometimes it is cheaper to print the characters rather than |
1607 | use the terminal's capabilities. If we're growing the number | |
1608 | of lines, make sure we actually cause the new line to wrap | |
1609 | around on auto-wrapping terminals. */ | |
b0c16657 | 1610 | else if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1611 | { |
28ef6c31 | 1612 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1613 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1614 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 | 1615 | invisible characters. We need to just draw them. */ |
57a3f689 CR |
1616 | /* The same thing happens if we're trying to draw before the last |
1617 | invisible character in the prompt string or we're increasing the | |
1618 | number of invisible characters in the line and we're not drawing | |
1619 | the entire prompt string. */ | |
1620 | if (*ols && ((_rl_horizontal_scroll_mode && | |
1621 | _rl_last_c_pos == 0 && | |
1622 | lendiff > prompt_visible_length && | |
1623 | current_invis_chars > 0) == 0) && | |
1624 | (((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && | |
1625 | current_line == 0 && wrap_offset && | |
1626 | ((nfd - new) <= prompt_last_invisible) && | |
1627 | (col_lendiff < prompt_visible_length)) == 0) && | |
1628 | (visible_wrap_offset >= current_invis_chars)) | |
726f6388 | 1629 | { |
7117c2d2 JA |
1630 | insert_some_chars (nfd, lendiff, col_lendiff); |
1631 | _rl_last_c_pos += col_lendiff; | |
726f6388 | 1632 | } |
57a3f689 CR |
1633 | #if 0 /* XXX - for now */ |
1634 | else if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && _rl_last_c_pos == 0 && wrap_offset && (nfd-new) <= prompt_last_invisible && col_lendiff < prompt_visible_length && visible_wrap_offset >= current_invis_chars) | |
1635 | { | |
1636 | _rl_output_some_chars (nfd, lendiff); | |
1637 | _rl_last_c_pos += col_lendiff; | |
1638 | } | |
1639 | #endif | |
d90269dd | 1640 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
726f6388 JA |
1641 | { |
1642 | /* At the end of a line the characters do not have to | |
1643 | be "inserted". They can just be placed on the screen. */ | |
ccc6cda3 | 1644 | /* However, this screws up the rest of this block, which |
b72432fd | 1645 | assumes you've done the insert because you can. */ |
726f6388 | 1646 | _rl_output_some_chars (nfd, lendiff); |
7117c2d2 | 1647 | _rl_last_c_pos += col_lendiff; |
726f6388 | 1648 | } |
ccc6cda3 JA |
1649 | else |
1650 | { | |
ccc6cda3 | 1651 | _rl_output_some_chars (nfd, temp); |
5c26afb8 | 1652 | _rl_last_c_pos += col_temp; |
57a3f689 CR |
1653 | /* If nfd begins before the last invisible character in the |
1654 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1655 | and set cpos_adjusted to let the caller know. */ | |
1656 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
97c2aab2 CR |
1657 | { |
1658 | _rl_last_c_pos -= wrap_offset; | |
1659 | cpos_adjusted = 1; | |
1660 | } | |
ccc6cda3 JA |
1661 | return; |
1662 | } | |
726f6388 JA |
1663 | /* Copy (new) chars to screen from first diff to last match. */ |
1664 | temp = nls - nfd; | |
1665 | if ((temp - lendiff) > 0) | |
1666 | { | |
1667 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
5e13499c CR |
1668 | /* XXX -- this bears closer inspection. Fixes a redisplay bug |
1669 | reported against bash-3.0-alpha by Andreas Schwab involving | |
1670 | multibyte characters and prompt strings with invisible | |
1671 | characters, but was previously disabled. */ | |
d3ad40de CR |
1672 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1673 | twidth = _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); | |
1674 | else | |
1675 | twidth = temp - lendiff; | |
1676 | _rl_last_c_pos += twidth; | |
57a3f689 CR |
1677 | /* If nfd begins before the last invisible character in the |
1678 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1679 | and set cpos_adjusted to let the caller know. */ | |
1680 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
1681 | { | |
1682 | _rl_last_c_pos -= wrap_offset; | |
1683 | cpos_adjusted = 1; | |
1684 | } | |
726f6388 JA |
1685 | } |
1686 | } | |
1687 | else | |
1688 | { | |
1689 | /* cannot insert chars, write to EOL */ | |
1690 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1691 | _rl_last_c_pos += col_temp; |
5c26afb8 CR |
1692 | /* If we're in a multibyte locale and were before the last invisible |
1693 | char in the current line (which implies we just output some invisible | |
28089d04 CR |
1694 | characters) we need to adjust _rl_last_c_pos, since it represents |
1695 | a physical character position. */ | |
57a3f689 CR |
1696 | if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
1697 | current_line == prompt_last_screen_line && wrap_offset && | |
1698 | wrap_offset != prompt_invis_chars_first_line && | |
1699 | ((nfd-new) < (prompt_last_invisible-(current_line*_rl_screenwidth)))) | |
1700 | { | |
1701 | _rl_last_c_pos -= wrap_offset - prompt_invis_chars_first_line; | |
1702 | cpos_adjusted = 1; | |
1703 | } | |
726f6388 JA |
1704 | } |
1705 | } | |
1706 | else /* Delete characters from line. */ | |
1707 | { | |
1708 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1709 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1710 | { |
1711 | /* If all we're doing is erasing the invisible characters in the | |
1712 | prompt string, don't bother. It screws up the assumptions | |
1713 | about what's on the screen. */ | |
1714 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1715 | -lendiff == visible_wrap_offset) | |
7117c2d2 | 1716 | col_lendiff = 0; |
726f6388 | 1717 | |
7117c2d2 JA |
1718 | if (col_lendiff) |
1719 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 JA |
1720 | |
1721 | /* Copy (new) chars to screen from first diff to last match */ | |
1722 | temp = nls - nfd; | |
1723 | if (temp > 0) | |
1724 | { | |
d3ad40de CR |
1725 | /* If nfd begins at the prompt, or before the invisible |
1726 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1727 | in a multibyte locale to account for the wrap offset and | |
1728 | set cpos_adjusted accordingly. */ | |
726f6388 | 1729 | _rl_output_some_chars (nfd, temp); |
d3ad40de CR |
1730 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1731 | { | |
1732 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp); | |
1733 | if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
1734 | { | |
1735 | _rl_last_c_pos -= wrap_offset; | |
1736 | cpos_adjusted = 1; | |
1737 | } | |
1738 | } | |
1739 | else | |
1740 | _rl_last_c_pos += temp; | |
726f6388 JA |
1741 | } |
1742 | } | |
1743 | /* Otherwise, print over the existing material. */ | |
1744 | else | |
1745 | { | |
1746 | if (temp > 0) | |
1747 | { | |
d3ad40de CR |
1748 | /* If nfd begins at the prompt, or before the invisible |
1749 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1750 | in a multibyte locale to account for the wrap offset and | |
1751 | set cpos_adjusted accordingly. */ | |
726f6388 | 1752 | _rl_output_some_chars (nfd, temp); |
28089d04 | 1753 | _rl_last_c_pos += col_temp; /* XXX */ |
d3ad40de CR |
1754 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1755 | { | |
1756 | if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible)) | |
1757 | { | |
1758 | _rl_last_c_pos -= wrap_offset; | |
1759 | cpos_adjusted = 1; | |
1760 | } | |
1761 | } | |
726f6388 JA |
1762 | } |
1763 | lendiff = (oe - old) - (ne - new); | |
7117c2d2 JA |
1764 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1765 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1766 | else | |
1767 | col_lendiff = lendiff; | |
1768 | ||
57a3f689 | 1769 | #if 0 |
7117c2d2 | 1770 | if (col_lendiff) |
57a3f689 CR |
1771 | #else |
1772 | /* If we've already printed over the entire width of the screen, | |
1773 | including the old material, then col_lendiff doesn't matter and | |
1774 | space_to_eol will insert too many spaces. XXX - maybe we should | |
1775 | adjust col_lendiff based on the difference between _rl_last_c_pos | |
1776 | and _rl_screenwidth */ | |
1777 | if (col_lendiff && (_rl_last_c_pos < _rl_screenwidth)) | |
1778 | #endif | |
b72432fd JA |
1779 | { |
1780 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 1781 | space_to_eol (col_lendiff); |
b72432fd | 1782 | else |
7117c2d2 | 1783 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 1784 | } |
726f6388 JA |
1785 | } |
1786 | } | |
1787 | } | |
1788 | ||
1789 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1790 | int |
726f6388 JA |
1791 | rl_on_new_line () |
1792 | { | |
1793 | if (visible_line) | |
1794 | visible_line[0] = '\0'; | |
1795 | ||
1796 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1797 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1798 | if (vis_lbreaks) |
1799 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1800 | visible_wrap_offset = 0; | |
726f6388 JA |
1801 | return 0; |
1802 | } | |
1803 | ||
bb70624e JA |
1804 | /* Tell the update routines that we have moved onto a new line with the |
1805 | prompt already displayed. Code originally from the version of readline | |
61deeb13 CR |
1806 | distributed with CLISP. rl_expand_prompt must have already been called |
1807 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
1808 | int |
1809 | rl_on_new_line_with_prompt () | |
1810 | { | |
1811 | int prompt_size, i, l, real_screenwidth, newlines; | |
61deeb13 | 1812 | char *prompt_last_line, *lprompt; |
bb70624e JA |
1813 | |
1814 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1815 | the already-displayed prompt. */ | |
1816 | prompt_size = strlen (rl_prompt) + 1; | |
1817 | init_line_structures (prompt_size); | |
1818 | ||
1819 | /* Make sure the line structures hold the already-displayed prompt for | |
1820 | redisplay. */ | |
61deeb13 CR |
1821 | lprompt = local_prompt ? local_prompt : rl_prompt; |
1822 | strcpy (visible_line, lprompt); | |
1823 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
1824 | |
1825 | /* If the prompt contains newlines, take the last tail. */ | |
1826 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1827 | if (!prompt_last_line) | |
1828 | prompt_last_line = rl_prompt; | |
1829 | ||
1830 | l = strlen (prompt_last_line); | |
7117c2d2 | 1831 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
28089d04 | 1832 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); /* XXX */ |
7117c2d2 JA |
1833 | else |
1834 | _rl_last_c_pos = l; | |
bb70624e JA |
1835 | |
1836 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1837 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1838 | one less, see terminal.c. */ | |
28ef6c31 | 1839 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1840 | _rl_last_v_pos = l / real_screenwidth; |
1841 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1842 | whether the cursor is at the end of the last line, or already at the | |
1843 | beginning of the next line. Output a newline just to be safe. */ | |
1844 | if (l > 0 && (l % real_screenwidth) == 0) | |
1845 | _rl_output_some_chars ("\n", 1); | |
1846 | last_lmargin = 0; | |
1847 | ||
1848 | newlines = 0; i = 0; | |
1849 | while (i <= l) | |
1850 | { | |
1851 | _rl_vis_botlin = newlines; | |
1852 | vis_lbreaks[newlines++] = i; | |
1853 | i += real_screenwidth; | |
1854 | } | |
1855 | vis_lbreaks[newlines] = l; | |
1856 | visible_wrap_offset = 0; | |
1857 | ||
61deeb13 CR |
1858 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
1859 | ||
bb70624e JA |
1860 | return 0; |
1861 | } | |
1862 | ||
726f6388 | 1863 | /* Actually update the display, period. */ |
ccc6cda3 | 1864 | int |
726f6388 JA |
1865 | rl_forced_update_display () |
1866 | { | |
0cc62c12 CR |
1867 | register char *temp; |
1868 | ||
726f6388 JA |
1869 | if (visible_line) |
1870 | { | |
0cc62c12 | 1871 | temp = visible_line; |
ccc6cda3 | 1872 | while (*temp) |
b72432fd | 1873 | *temp++ = '\0'; |
726f6388 JA |
1874 | } |
1875 | rl_on_new_line (); | |
1876 | forced_display++; | |
ccc6cda3 | 1877 | (*rl_redisplay_function) (); |
726f6388 JA |
1878 | return 0; |
1879 | } | |
1880 | ||
1881 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
28089d04 CR |
1882 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
1883 | buffer index.) | |
726f6388 JA |
1884 | DATA is the contents of the screen line of interest; i.e., where |
1885 | the movement is being done. */ | |
1886 | void | |
1887 | _rl_move_cursor_relative (new, data) | |
1888 | int new; | |
28ef6c31 | 1889 | const char *data; |
726f6388 JA |
1890 | { |
1891 | register int i; | |
28089d04 CR |
1892 | int woff; /* number of invisible chars on current line */ |
1893 | int cpos, dpos; /* current and desired cursor positions */ | |
726f6388 | 1894 | |
234d8729 | 1895 | woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset); |
28089d04 | 1896 | cpos = _rl_last_c_pos; |
7117c2d2 JA |
1897 | #if defined (HANDLE_MULTIBYTE) |
1898 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1899 | a multibyte string, but _rl_last_c_pos is the display position. In | |
d3a24ed2 | 1900 | this case, NEW's display position is not obvious and must be |
28089d04 CR |
1901 | calculated. We need to account for invisible characters in this line, |
1902 | as long as we are past them and they are counted by _rl_col_width. */ | |
1903 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
d3a24ed2 | 1904 | { |
28089d04 | 1905 | dpos = _rl_col_width (data, 0, new); |
d3ad40de CR |
1906 | /* Use NEW when comparing against the last invisible character in the |
1907 | prompt string, since they're both buffer indices and DPOS is a | |
1908 | desired display position. */ | |
234d8729 CR |
1909 | if ((new > prompt_last_invisible) || /* XXX - don't use woff here */ |
1910 | (prompt_physical_chars > _rl_screenwidth && | |
1911 | _rl_last_v_pos == prompt_last_screen_line && | |
c92a890b | 1912 | wrap_offset >= woff && |
57a3f689 CR |
1913 | new > (prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset))) |
1914 | /* XXX last comparison might need to be >= */ | |
d3ad40de CR |
1915 | { |
1916 | dpos -= woff; | |
1917 | /* Since this will be assigned to _rl_last_c_pos at the end (more | |
1918 | precisely, _rl_last_c_pos == dpos when this function returns), | |
1919 | let the caller know. */ | |
1920 | cpos_adjusted = 1; | |
1921 | } | |
d3a24ed2 | 1922 | } |
28089d04 | 1923 | else |
7117c2d2 | 1924 | #endif |
28089d04 CR |
1925 | dpos = new; |
1926 | ||
1927 | /* If we don't have to do anything, then return. */ | |
1928 | if (cpos == dpos) | |
1929 | return; | |
726f6388 JA |
1930 | |
1931 | /* It may be faster to output a CR, and then move forwards instead | |
1932 | of moving backwards. */ | |
1933 | /* i == current physical cursor position. */ | |
28089d04 CR |
1934 | #if defined (HANDLE_MULTIBYTE) |
1935 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1936 | i = _rl_last_c_pos; | |
1937 | else | |
1938 | #endif | |
1939 | i = _rl_last_c_pos - woff; | |
d3ad40de | 1940 | if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) || |
28ef6c31 | 1941 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
1942 | { |
1943 | #if defined (__MSDOS__) | |
1944 | putc ('\r', rl_outstream); | |
1945 | #else | |
28ef6c31 | 1946 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 | 1947 | #endif /* !__MSDOS__ */ |
28089d04 | 1948 | cpos = _rl_last_c_pos = 0; |
726f6388 JA |
1949 | } |
1950 | ||
28089d04 | 1951 | if (cpos < dpos) |
726f6388 JA |
1952 | { |
1953 | /* Move the cursor forward. We do it by printing the command | |
1954 | to move the cursor forward if there is one, else print that | |
1955 | portion of the output buffer again. Which is cheaper? */ | |
1956 | ||
1957 | /* The above comment is left here for posterity. It is faster | |
1958 | to print one character (non-control) than to print a control | |
1959 | sequence telling the terminal to move forward one character. | |
1960 | That kind of control is for people who don't know what the | |
1961 | data is underneath the cursor. */ | |
d3ad40de CR |
1962 | |
1963 | /* However, we need a handle on where the current display position is | |
1964 | in the buffer for the immediately preceding comment to be true. | |
1965 | In multibyte locales, we don't currently have that info available. | |
1966 | Without it, we don't know where the data we have to display begins | |
1967 | in the buffer and we have to go back to the beginning of the screen | |
1968 | line. In this case, we can use the terminal sequence to move forward | |
1969 | if it's available. */ | |
7117c2d2 JA |
1970 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1971 | { | |
d3ad40de CR |
1972 | if (_rl_term_forward_char) |
1973 | { | |
1974 | for (i = cpos; i < dpos; i++) | |
1975 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1976 | } | |
1977 | else | |
1978 | { | |
1979 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1980 | for (i = 0; i < new; i++) | |
1981 | putc (data[i], rl_outstream); | |
1982 | } | |
7117c2d2 | 1983 | } |
726f6388 | 1984 | else |
28089d04 | 1985 | for (i = cpos; i < new; i++) |
726f6388 | 1986 | putc (data[i], rl_outstream); |
726f6388 | 1987 | } |
28089d04 | 1988 | |
7117c2d2 JA |
1989 | #if defined (HANDLE_MULTIBYTE) |
1990 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1991 | The byte length of the string is probably bigger than the column width | |
1992 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1993 | display point is less than _rl_last_c_pos. */ | |
7117c2d2 | 1994 | #endif |
28089d04 CR |
1995 | else if (cpos > dpos) |
1996 | _rl_backspace (cpos - dpos); | |
7117c2d2 | 1997 | |
28089d04 | 1998 | _rl_last_c_pos = dpos; |
726f6388 JA |
1999 | } |
2000 | ||
2001 | /* PWP: move the cursor up or down. */ | |
2002 | void | |
2003 | _rl_move_vert (to) | |
2004 | int to; | |
2005 | { | |
2006 | register int delta, i; | |
2007 | ||
28ef6c31 | 2008 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
2009 | return; |
2010 | ||
726f6388 JA |
2011 | if ((delta = to - _rl_last_v_pos) > 0) |
2012 | { | |
2013 | for (i = 0; i < delta; i++) | |
2014 | putc ('\n', rl_outstream); | |
bb70624e JA |
2015 | #if defined (__MSDOS__) |
2016 | putc ('\r', rl_outstream); | |
2017 | #else | |
28ef6c31 | 2018 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2019 | #endif |
726f6388 JA |
2020 | _rl_last_c_pos = 0; |
2021 | } | |
2022 | else | |
2023 | { /* delta < 0 */ | |
28ef6c31 | 2024 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 2025 | for (i = 0; i < -delta; i++) |
28ef6c31 | 2026 | tputs (_rl_term_up, 1, _rl_output_character_function); |
726f6388 | 2027 | } |
bb70624e | 2028 | |
726f6388 JA |
2029 | _rl_last_v_pos = to; /* Now TO is here */ |
2030 | } | |
2031 | ||
2032 | /* Physically print C on rl_outstream. This is for functions which know | |
2033 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 2034 | int |
726f6388 JA |
2035 | rl_show_char (c) |
2036 | int c; | |
2037 | { | |
2038 | int n = 1; | |
2039 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
2040 | { | |
2041 | fprintf (rl_outstream, "M-"); | |
2042 | n += 2; | |
2043 | c = UNMETA (c); | |
2044 | } | |
2045 | ||
2046 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 2047 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 2048 | #else |
ccc6cda3 | 2049 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
2050 | #endif /* !DISPLAY_TABS */ |
2051 | { | |
2052 | fprintf (rl_outstream, "C-"); | |
2053 | n += 2; | |
ccc6cda3 | 2054 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
2055 | } |
2056 | ||
2057 | putc (c, rl_outstream); | |
2058 | fflush (rl_outstream); | |
2059 | return n; | |
2060 | } | |
2061 | ||
2062 | int | |
2063 | rl_character_len (c, pos) | |
2064 | register int c, pos; | |
2065 | { | |
2066 | unsigned char uc; | |
2067 | ||
2068 | uc = (unsigned char)c; | |
2069 | ||
2070 | if (META_CHAR (uc)) | |
2071 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
2072 | ||
2073 | if (uc == '\t') | |
2074 | { | |
2075 | #if defined (DISPLAY_TABS) | |
2076 | return (((pos | 7) + 1) - pos); | |
2077 | #else | |
2078 | return (2); | |
2079 | #endif /* !DISPLAY_TABS */ | |
2080 | } | |
2081 | ||
ccc6cda3 JA |
2082 | if (CTRL_CHAR (c) || c == RUBOUT) |
2083 | return (2); | |
2084 | ||
f73dda09 | 2085 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 | 2086 | } |
726f6388 JA |
2087 | /* How to print things in the "echo-area". The prompt is treated as a |
2088 | mini-modeline. */ | |
6e70dbff | 2089 | static int msg_saved_prompt = 0; |
726f6388 | 2090 | |
ccc6cda3 JA |
2091 | #if defined (USE_VARARGS) |
2092 | int | |
2093 | #if defined (PREFER_STDARG) | |
2094 | rl_message (const char *format, ...) | |
2095 | #else | |
726f6388 JA |
2096 | rl_message (va_alist) |
2097 | va_dcl | |
ccc6cda3 | 2098 | #endif |
726f6388 | 2099 | { |
726f6388 | 2100 | va_list args; |
ccc6cda3 JA |
2101 | #if defined (PREFER_VARARGS) |
2102 | char *format; | |
2103 | #endif | |
726f6388 | 2104 | |
ccc6cda3 JA |
2105 | #if defined (PREFER_STDARG) |
2106 | va_start (args, format); | |
2107 | #else | |
726f6388 JA |
2108 | va_start (args); |
2109 | format = va_arg (args, char *); | |
ccc6cda3 JA |
2110 | #endif |
2111 | ||
f73dda09 JA |
2112 | #if defined (HAVE_VSNPRINTF) |
2113 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
2114 | #else | |
726f6388 | 2115 | vsprintf (msg_buf, format, args); |
f73dda09 JA |
2116 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
2117 | #endif | |
726f6388 JA |
2118 | va_end (args); |
2119 | ||
6e70dbff CR |
2120 | if (saved_local_prompt == 0) |
2121 | { | |
2122 | rl_save_prompt (); | |
2123 | msg_saved_prompt = 1; | |
2124 | } | |
726f6388 | 2125 | rl_display_prompt = msg_buf; |
6e70dbff CR |
2126 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
2127 | &prompt_last_invisible, | |
2128 | &prompt_invis_chars_first_line, | |
2129 | &prompt_physical_chars); | |
2130 | local_prompt_prefix = (char *)NULL; | |
d3ad40de | 2131 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 2132 | (*rl_redisplay_function) (); |
6e70dbff | 2133 | |
726f6388 JA |
2134 | return 0; |
2135 | } | |
ccc6cda3 JA |
2136 | #else /* !USE_VARARGS */ |
2137 | int | |
726f6388 JA |
2138 | rl_message (format, arg1, arg2) |
2139 | char *format; | |
2140 | { | |
2141 | sprintf (msg_buf, format, arg1, arg2); | |
f73dda09 | 2142 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
6e70dbff | 2143 | |
726f6388 | 2144 | rl_display_prompt = msg_buf; |
6e70dbff CR |
2145 | if (saved_local_prompt == 0) |
2146 | { | |
2147 | rl_save_prompt (); | |
2148 | msg_saved_prompt = 1; | |
2149 | } | |
2150 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, | |
2151 | &prompt_last_invisible, | |
2152 | &prompt_invis_chars_first_line, | |
2153 | &prompt_physical_chars); | |
2154 | local_prompt_prefix = (char *)NULL; | |
d3ad40de | 2155 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 2156 | (*rl_redisplay_function) (); |
6e70dbff | 2157 | |
726f6388 JA |
2158 | return 0; |
2159 | } | |
ccc6cda3 | 2160 | #endif /* !USE_VARARGS */ |
726f6388 JA |
2161 | |
2162 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 2163 | int |
726f6388 JA |
2164 | rl_clear_message () |
2165 | { | |
2166 | rl_display_prompt = rl_prompt; | |
6e70dbff CR |
2167 | if (msg_saved_prompt) |
2168 | { | |
2169 | rl_restore_prompt (); | |
2170 | msg_saved_prompt = 0; | |
2171 | } | |
ccc6cda3 | 2172 | (*rl_redisplay_function) (); |
726f6388 JA |
2173 | return 0; |
2174 | } | |
2175 | ||
ccc6cda3 | 2176 | int |
726f6388 JA |
2177 | rl_reset_line_state () |
2178 | { | |
2179 | rl_on_new_line (); | |
2180 | ||
2181 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
2182 | forced_display = 1; | |
2183 | return 0; | |
2184 | } | |
2185 | ||
ccc6cda3 | 2186 | void |
b72432fd | 2187 | rl_save_prompt () |
ccc6cda3 JA |
2188 | { |
2189 | saved_local_prompt = local_prompt; | |
2190 | saved_local_prefix = local_prompt_prefix; | |
6e70dbff | 2191 | saved_prefix_length = prompt_prefix_length; |
d3ad40de | 2192 | saved_local_length = local_prompt_len; |
28ef6c31 JA |
2193 | saved_last_invisible = prompt_last_invisible; |
2194 | saved_visible_length = prompt_visible_length; | |
d3a24ed2 | 2195 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
762a763b | 2196 | saved_physical_chars = prompt_physical_chars; |
ccc6cda3 JA |
2197 | |
2198 | local_prompt = local_prompt_prefix = (char *)0; | |
d3ad40de | 2199 | local_prompt_len = 0; |
6e70dbff | 2200 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
762a763b | 2201 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
2202 | } |
2203 | ||
2204 | void | |
b72432fd | 2205 | rl_restore_prompt () |
ccc6cda3 | 2206 | { |
28ef6c31 JA |
2207 | FREE (local_prompt); |
2208 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
2209 | |
2210 | local_prompt = saved_local_prompt; | |
2211 | local_prompt_prefix = saved_local_prefix; | |
d3ad40de | 2212 | local_prompt_len = saved_local_length; |
6e70dbff | 2213 | prompt_prefix_length = saved_prefix_length; |
28ef6c31 JA |
2214 | prompt_last_invisible = saved_last_invisible; |
2215 | prompt_visible_length = saved_visible_length; | |
d3a24ed2 | 2216 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
762a763b | 2217 | prompt_physical_chars = saved_physical_chars; |
6e70dbff CR |
2218 | |
2219 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
2220 | saved_local_prompt = saved_local_prefix = (char *)0; | |
d3ad40de | 2221 | saved_local_length = 0; |
6e70dbff CR |
2222 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; |
2223 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
ccc6cda3 JA |
2224 | } |
2225 | ||
2226 | char * | |
2227 | _rl_make_prompt_for_search (pchar) | |
2228 | int pchar; | |
2229 | { | |
2230 | int len; | |
0cc62c12 | 2231 | char *pmt, *p; |
ccc6cda3 | 2232 | |
b72432fd | 2233 | rl_save_prompt (); |
ccc6cda3 | 2234 | |
0cc62c12 CR |
2235 | /* We've saved the prompt, and can do anything with the various prompt |
2236 | strings we need before they're restored. We want the unexpanded | |
2237 | portion of the prompt string after any final newline. */ | |
2238 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; | |
2239 | if (p == 0) | |
2240 | { | |
2241 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
2242 | pmt = (char *)xmalloc (len + 2); | |
2243 | if (len) | |
2244 | strcpy (pmt, rl_prompt); | |
2245 | pmt[len] = pchar; | |
2246 | pmt[len+1] = '\0'; | |
2247 | } | |
2248 | else | |
2249 | { | |
2250 | p++; | |
2251 | len = strlen (p); | |
2252 | pmt = (char *)xmalloc (len + 2); | |
2253 | if (len) | |
2254 | strcpy (pmt, p); | |
2255 | pmt[len] = pchar; | |
2256 | pmt[len+1] = '\0'; | |
2257 | } | |
762a763b | 2258 | |
2abb7255 | 2259 | /* will be overwritten by expand_prompt, called from rl_message */ |
6e70dbff | 2260 | prompt_physical_chars = saved_physical_chars + 1; |
ccc6cda3 JA |
2261 | return pmt; |
2262 | } | |
2263 | ||
726f6388 JA |
2264 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
2265 | void | |
2266 | _rl_erase_at_end_of_line (l) | |
2267 | int l; | |
2268 | { | |
2269 | register int i; | |
2270 | ||
ccc6cda3 | 2271 | _rl_backspace (l); |
726f6388 JA |
2272 | for (i = 0; i < l; i++) |
2273 | putc (' ', rl_outstream); | |
ccc6cda3 | 2274 | _rl_backspace (l); |
726f6388 JA |
2275 | for (i = 0; i < l; i++) |
2276 | visible_line[--_rl_last_c_pos] = '\0'; | |
2277 | rl_display_fixed++; | |
2278 | } | |
2279 | ||
2280 | /* Clear to the end of the line. COUNT is the minimum | |
2281 | number of character spaces to clear, */ | |
d166f048 JA |
2282 | void |
2283 | _rl_clear_to_eol (count) | |
726f6388 JA |
2284 | int count; |
2285 | { | |
28ef6c31 JA |
2286 | if (_rl_term_clreol) |
2287 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d166f048 | 2288 | else if (count) |
726f6388 JA |
2289 | space_to_eol (count); |
2290 | } | |
2291 | ||
2292 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2293 | number of character spaces to clear, */ | |
2294 | static void | |
2295 | space_to_eol (count) | |
2296 | int count; | |
2297 | { | |
2298 | register int i; | |
2299 | ||
2300 | for (i = 0; i < count; i++) | |
2301 | putc (' ', rl_outstream); | |
2302 | ||
2303 | _rl_last_c_pos += count; | |
2304 | } | |
2305 | ||
d166f048 JA |
2306 | void |
2307 | _rl_clear_screen () | |
2308 | { | |
28ef6c31 JA |
2309 | if (_rl_term_clrpag) |
2310 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 2311 | else |
28ef6c31 | 2312 | rl_crlf (); |
d166f048 JA |
2313 | } |
2314 | ||
7117c2d2 | 2315 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 2316 | static void |
7117c2d2 | 2317 | insert_some_chars (string, count, col) |
726f6388 | 2318 | char *string; |
7117c2d2 | 2319 | int count, col; |
726f6388 | 2320 | { |
9607141c CR |
2321 | #if defined (__MSDOS__) || defined (__MINGW32__) |
2322 | _rl_output_some_chars (string, count); | |
2323 | #else | |
7117c2d2 JA |
2324 | /* DEBUGGING */ |
2325 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
2326 | if (count != col) | |
d3ad40de | 2327 | _rl_ttymsg ("debug: insert_some_chars: count (%d) != col (%d)", count, col); |
7117c2d2 | 2328 | |
726f6388 | 2329 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2330 | if (_rl_term_IC) |
726f6388 | 2331 | { |
ccc6cda3 | 2332 | char *buffer; |
7117c2d2 JA |
2333 | |
2334 | buffer = tgoto (_rl_term_IC, 0, col); | |
726f6388 JA |
2335 | tputs (buffer, 1, _rl_output_character_function); |
2336 | _rl_output_some_chars (string, count); | |
2337 | } | |
2338 | else | |
2339 | { | |
2340 | register int i; | |
2341 | ||
2342 | /* If we have to turn on insert-mode, then do so. */ | |
28ef6c31 JA |
2343 | if (_rl_term_im && *_rl_term_im) |
2344 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
726f6388 JA |
2345 | |
2346 | /* If there is a special command for inserting characters, then | |
2347 | use that first to open up the space. */ | |
28ef6c31 | 2348 | if (_rl_term_ic && *_rl_term_ic) |
726f6388 | 2349 | { |
7117c2d2 | 2350 | for (i = col; i--; ) |
28ef6c31 | 2351 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
726f6388 JA |
2352 | } |
2353 | ||
2354 | /* Print the text. */ | |
2355 | _rl_output_some_chars (string, count); | |
2356 | ||
2357 | /* If there is a string to turn off insert mode, we had best use | |
2358 | it now. */ | |
28ef6c31 JA |
2359 | if (_rl_term_ei && *_rl_term_ei) |
2360 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
726f6388 | 2361 | } |
9607141c | 2362 | #endif /* __MSDOS__ || __MINGW32__ */ |
726f6388 JA |
2363 | } |
2364 | ||
2365 | /* Delete COUNT characters from the display line. */ | |
2366 | static void | |
2367 | delete_chars (count) | |
2368 | int count; | |
2369 | { | |
28ef6c31 | 2370 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2371 | return; |
2372 | ||
9607141c | 2373 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
28ef6c31 | 2374 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2375 | { |
ccc6cda3 | 2376 | char *buffer; |
28ef6c31 | 2377 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2378 | tputs (buffer, count, _rl_output_character_function); |
2379 | } | |
2380 | else | |
2381 | { | |
28ef6c31 | 2382 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2383 | while (count--) |
28ef6c31 | 2384 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2385 | } |
9607141c | 2386 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
726f6388 JA |
2387 | } |
2388 | ||
2389 | void | |
2390 | _rl_update_final () | |
2391 | { | |
2392 | int full_lines; | |
2393 | ||
2394 | full_lines = 0; | |
ccc6cda3 JA |
2395 | /* If the cursor is the only thing on an otherwise-blank last line, |
2396 | compensate so we don't print an extra CRLF. */ | |
2397 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2398 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2399 | { |
2400 | _rl_vis_botlin--; | |
2401 | full_lines = 1; | |
2402 | } | |
2403 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2404 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2405 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2406 | { |
726f6388 | 2407 | char *last_line; |
7117c2d2 | 2408 | |
bb70624e | 2409 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
d3ad40de CR |
2410 | cpos_buffer_position = -1; /* don't know where we are in buffer */ |
2411 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */ | |
d166f048 | 2412 | _rl_clear_to_eol (0); |
28ef6c31 | 2413 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2414 | } |
2415 | _rl_vis_botlin = 0; | |
28ef6c31 | 2416 | rl_crlf (); |
726f6388 JA |
2417 | fflush (rl_outstream); |
2418 | rl_display_fixed++; | |
2419 | } | |
2420 | ||
2421 | /* Move to the start of the current line. */ | |
2422 | static void | |
2423 | cr () | |
2424 | { | |
28ef6c31 | 2425 | if (_rl_term_cr) |
726f6388 | 2426 | { |
bb70624e JA |
2427 | #if defined (__MSDOS__) |
2428 | putc ('\r', rl_outstream); | |
2429 | #else | |
28ef6c31 | 2430 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2431 | #endif |
726f6388 JA |
2432 | _rl_last_c_pos = 0; |
2433 | } | |
2434 | } | |
2435 | ||
bb70624e JA |
2436 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2437 | terminal escape sequences. Called with the cursor at column 0 of the | |
2438 | line to draw the prompt on. */ | |
2439 | static void | |
2440 | redraw_prompt (t) | |
2441 | char *t; | |
2442 | { | |
6e70dbff | 2443 | char *oldp; |
bb70624e | 2444 | |
bb70624e | 2445 | oldp = rl_display_prompt; |
6e70dbff | 2446 | rl_save_prompt (); |
bb70624e JA |
2447 | |
2448 | rl_display_prompt = t; | |
28ef6c31 JA |
2449 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2450 | &prompt_last_invisible, | |
43cdcad8 CR |
2451 | &prompt_invis_chars_first_line, |
2452 | &prompt_physical_chars); | |
bb70624e | 2453 | local_prompt_prefix = (char *)NULL; |
d3ad40de | 2454 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
6e70dbff | 2455 | |
bb70624e JA |
2456 | rl_forced_update_display (); |
2457 | ||
2458 | rl_display_prompt = oldp; | |
6e70dbff | 2459 | rl_restore_prompt(); |
bb70624e JA |
2460 | } |
2461 | ||
726f6388 JA |
2462 | /* Redisplay the current line after a SIGWINCH is received. */ |
2463 | void | |
2464 | _rl_redisplay_after_sigwinch () | |
2465 | { | |
bb70624e | 2466 | char *t; |
726f6388 | 2467 | |
d3ad40de CR |
2468 | /* Clear the last line (assuming that the screen size change will result in |
2469 | either more or fewer characters on that line only) and put the cursor at | |
2470 | column 0. Make sure the right thing happens if we have wrapped to a new | |
2471 | screen line. */ | |
28ef6c31 | 2472 | if (_rl_term_cr) |
726f6388 | 2473 | { |
d3ad40de CR |
2474 | _rl_move_vert (_rl_vis_botlin); |
2475 | ||
bb70624e JA |
2476 | #if defined (__MSDOS__) |
2477 | putc ('\r', rl_outstream); | |
2478 | #else | |
28ef6c31 | 2479 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2480 | #endif |
726f6388 | 2481 | _rl_last_c_pos = 0; |
bb70624e | 2482 | #if defined (__MSDOS__) |
28ef6c31 | 2483 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2484 | putc ('\r', rl_outstream); |
2485 | #else | |
28ef6c31 JA |
2486 | if (_rl_term_clreol) |
2487 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2488 | else |
2489 | { | |
28ef6c31 JA |
2490 | space_to_eol (_rl_screenwidth); |
2491 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2492 | } |
bb70624e | 2493 | #endif |
726f6388 JA |
2494 | if (_rl_last_v_pos > 0) |
2495 | _rl_move_vert (0); | |
2496 | } | |
2497 | else | |
28ef6c31 | 2498 | rl_crlf (); |
726f6388 JA |
2499 | |
2500 | /* Redraw only the last line of a multi-line prompt. */ | |
2501 | t = strrchr (rl_display_prompt, '\n'); | |
2502 | if (t) | |
bb70624e | 2503 | redraw_prompt (++t); |
726f6388 JA |
2504 | else |
2505 | rl_forced_update_display (); | |
2506 | } | |
ccc6cda3 JA |
2507 | |
2508 | void | |
2509 | _rl_clean_up_for_exit () | |
2510 | { | |
6fbe7620 | 2511 | if (_rl_echoing_p) |
ccc6cda3 JA |
2512 | { |
2513 | _rl_move_vert (_rl_vis_botlin); | |
2514 | _rl_vis_botlin = 0; | |
2515 | fflush (rl_outstream); | |
b72432fd | 2516 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2517 | } |
2518 | } | |
b72432fd JA |
2519 | |
2520 | void | |
2521 | _rl_erase_entire_line () | |
2522 | { | |
2523 | cr (); | |
2524 | _rl_clear_to_eol (0); | |
2525 | cr (); | |
2526 | fflush (rl_outstream); | |
2527 | } | |
bb70624e JA |
2528 | |
2529 | /* return the `current display line' of the cursor -- the number of lines to | |
2530 | move up to get to the first screen line of the current readline line. */ | |
2531 | int | |
2532 | _rl_current_display_line () | |
2533 | { | |
2534 | int ret, nleft; | |
2535 | ||
2536 | /* Find out whether or not there might be invisible characters in the | |
2537 | editing buffer. */ | |
2538 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2539 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2540 | else |
28ef6c31 | 2541 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2542 | |
2543 | if (nleft > 0) | |
28ef6c31 | 2544 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2545 | else |
2546 | ret = 0; | |
2547 | ||
2548 | return ret; | |
2549 | } | |
7117c2d2 JA |
2550 | |
2551 | #if defined (HANDLE_MULTIBYTE) | |
2552 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2553 | In the case of multibyte characters with stateful encoding, we have to | |
2554 | scan from the beginning of the string to take the state into account. */ | |
2555 | static int | |
2556 | _rl_col_width (str, start, end) | |
d3a24ed2 | 2557 | const char *str; |
7117c2d2 JA |
2558 | int start, end; |
2559 | { | |
2560 | wchar_t wc; | |
d3ad40de | 2561 | mbstate_t ps; |
7117c2d2 JA |
2562 | int tmp, point, width, max; |
2563 | ||
2564 | if (end <= start) | |
2565 | return 0; | |
d3ad40de CR |
2566 | if (MB_CUR_MAX == 1 || rl_byte_oriented) |
2567 | { | |
2568 | _rl_ttymsg ("_rl_col_width: called with MB_CUR_MAX == 1"); | |
2569 | return (end - start); | |
2570 | } | |
2571 | ||
2572 | memset (&ps, 0, sizeof (mbstate_t)); | |
5cef52a7 | 2573 | |
7117c2d2 JA |
2574 | point = 0; |
2575 | max = end; | |
2576 | ||
2577 | while (point < start) | |
2578 | { | |
2579 | tmp = mbrlen (str + point, max, &ps); | |
d3a24ed2 | 2580 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2581 | { |
2582 | /* In this case, the bytes are invalid or too short to compose a | |
2583 | multibyte character, so we assume that the first byte represents | |
2584 | a single character. */ | |
2585 | point++; | |
2586 | max--; | |
2587 | ||
2588 | /* Clear the state of the byte sequence, because in this case the | |
2589 | effect of mbstate is undefined. */ | |
2590 | memset (&ps, 0, sizeof (mbstate_t)); | |
2591 | } | |
d3a24ed2 | 2592 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2593 | break; /* Found '\0' */ |
7117c2d2 JA |
2594 | else |
2595 | { | |
2596 | point += tmp; | |
2597 | max -= tmp; | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | /* If START is not a byte that starts a character, then POINT will be | |
2602 | greater than START. In this case, assume that (POINT - START) gives | |
2603 | a byte count that is the number of columns of difference. */ | |
2604 | width = point - start; | |
2605 | ||
2606 | while (point < end) | |
2607 | { | |
2608 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
d3a24ed2 | 2609 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2610 | { |
2611 | /* In this case, the bytes are invalid or too short to compose a | |
2612 | multibyte character, so we assume that the first byte represents | |
2613 | a single character. */ | |
2614 | point++; | |
2615 | max--; | |
2616 | ||
2617 | /* and assume that the byte occupies a single column. */ | |
2618 | width++; | |
2619 | ||
2620 | /* Clear the state of the byte sequence, because in this case the | |
2621 | effect of mbstate is undefined. */ | |
2622 | memset (&ps, 0, sizeof (mbstate_t)); | |
2623 | } | |
d3a24ed2 | 2624 | else if (MB_NULLWCH (tmp)) |
5e13499c | 2625 | break; /* Found '\0' */ |
7117c2d2 JA |
2626 | else |
2627 | { | |
2628 | point += tmp; | |
2629 | max -= tmp; | |
2630 | tmp = wcwidth(wc); | |
2631 | width += (tmp >= 0) ? tmp : 1; | |
2632 | } | |
2633 | } | |
2634 | ||
2635 | width += point - end; | |
2636 | ||
2637 | return width; | |
2638 | } | |
2639 | #endif /* HANDLE_MULTIBYTE */ |