]>
Commit | Line | Data |
---|---|---|
726f6388 JA |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
a0c0a00f | 3 | /* Copyright (C) 1987-2015 Free Software Foundation, Inc. |
726f6388 | 4 | |
3185942a JA |
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 | |
3185942a JA |
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 | ||
3185942a JA |
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 | ||
3185942a JA |
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 | ||
ac50fbac CR |
44 | #ifdef __MSDOS__ |
45 | # include <pc.h> | |
46 | #endif | |
47 | ||
726f6388 JA |
48 | /* System-specific feature definitions and include files. */ |
49 | #include "rldefs.h" | |
7117c2d2 | 50 | #include "rlmbutil.h" |
726f6388 | 51 | |
ccc6cda3 JA |
52 | /* Termcap library stuff. */ |
53 | #include "tcap.h" | |
54 | ||
726f6388 JA |
55 | /* Some standard library routines. */ |
56 | #include "readline.h" | |
57 | #include "history.h" | |
58 | ||
bb70624e JA |
59 | #include "rlprivate.h" |
60 | #include "xmalloc.h" | |
61 | ||
726f6388 JA |
62 | #if !defined (strchr) && !defined (__STDC__) |
63 | extern char *strchr (), *strrchr (); | |
64 | #endif /* !strchr && !__STDC__ */ | |
65 | ||
f73dda09 JA |
66 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
67 | static void space_to_eol PARAMS((int)); | |
68 | static void delete_chars PARAMS((int)); | |
7117c2d2 | 69 | static void insert_some_chars PARAMS((char *, int, int)); |
ac50fbac | 70 | static void open_some_spaces PARAMS((int)); |
f73dda09 | 71 | static void cr PARAMS((void)); |
a0c0a00f CR |
72 | static void redraw_prompt PARAMS((char *)); |
73 | ||
74 | /* Values for FLAGS */ | |
75 | #define PMT_MULTILINE 0x01 | |
76 | ||
77 | static char *expand_prompt PARAMS((char *, int, int *, int *, int *, int *)); | |
ccc6cda3 | 78 | |
3185942a JA |
79 | /* State of visible and invisible lines. */ |
80 | struct line_state | |
81 | { | |
82 | char *line; | |
83 | int *lbreaks; | |
84 | int lbsize; | |
85 | #if defined (HANDLE_MULTIBYTE) | |
3185942a | 86 | int wbsize; |
a0c0a00f | 87 | int *wrapped_line; |
3185942a JA |
88 | #endif |
89 | }; | |
90 | ||
91 | /* The line display buffers. One is the line currently displayed on | |
92 | the screen. The other is the line about to be displayed. */ | |
93 | static struct line_state line_state_array[2]; | |
94 | static struct line_state *line_state_visible = &line_state_array[0]; | |
95 | static struct line_state *line_state_invisible = &line_state_array[1]; | |
96 | static int line_structures_initialized = 0; | |
97 | ||
98 | /* Backwards-compatible names. */ | |
99 | #define inv_lbreaks (line_state_invisible->lbreaks) | |
100 | #define inv_lbsize (line_state_invisible->lbsize) | |
101 | #define vis_lbreaks (line_state_visible->lbreaks) | |
102 | #define vis_lbsize (line_state_visible->lbsize) | |
103 | ||
104 | #define visible_line (line_state_visible->line) | |
105 | #define invisible_line (line_state_invisible->line) | |
106 | ||
7117c2d2 | 107 | #if defined (HANDLE_MULTIBYTE) |
0001803f | 108 | static int _rl_col_width PARAMS((const char *, int, int, int)); |
7117c2d2 | 109 | #else |
0001803f | 110 | # define _rl_col_width(l, s, e, f) (((e) <= (s)) ? 0 : (e) - (s)) |
7117c2d2 JA |
111 | #endif |
112 | ||
726f6388 | 113 | /* Heuristic used to decide whether it is faster to move from CUR to NEW |
0628567a JA |
114 | by backing up or outputting a carriage return and moving forward. CUR |
115 | and NEW are either both buffer positions or absolute screen positions. */ | |
726f6388 JA |
116 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) |
117 | ||
0628567a JA |
118 | /* _rl_last_c_pos is an absolute cursor position in multibyte locales and a |
119 | buffer index in others. This macro is used when deciding whether the | |
120 | current cursor position is in the middle of a prompt string containing | |
3185942a | 121 | invisible characters. XXX - might need to take `modmark' into account. */ |
a0c0a00f CR |
122 | /* XXX - only valid when tested against _rl_last_c_pos; buffer indices need |
123 | to use prompt_last_invisible directly. */ | |
0628567a JA |
124 | #define PROMPT_ENDING_INDEX \ |
125 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) ? prompt_physical_chars : prompt_last_invisible+1) | |
126 | ||
127 | ||
726f6388 JA |
128 | /* **************************************************************** */ |
129 | /* */ | |
130 | /* Display stuff */ | |
131 | /* */ | |
132 | /* **************************************************************** */ | |
133 | ||
134 | /* This is the stuff that is hard for me. I never seem to write good | |
135 | display routines in C. Let's see how I do this time. */ | |
136 | ||
137 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
138 | the problems of input lines longer than the screen width. | |
139 | ||
140 | update_line and the code that calls it makes a multiple line, | |
141 | automatically wrapping line update. Careful attention needs | |
142 | to be paid to the vertical position variables. */ | |
143 | ||
144 | /* Keep two buffers; one which reflects the current contents of the | |
145 | screen, and the other to draw what we think the new contents should | |
146 | be. Then compare the buffers, and make whatever changes to the | |
147 | screen itself that we should. Finally, make the buffer that we | |
148 | just drew into be the one which reflects the current contents of the | |
149 | screen, and place the cursor where it belongs. | |
150 | ||
151 | Commands that want to can fix the display themselves, and then let | |
152 | this function know that the display has been fixed by setting the | |
153 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
154 | ||
ccc6cda3 | 155 | /* Application-specific redisplay function. */ |
28ef6c31 | 156 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 157 | |
726f6388 JA |
158 | /* Global variables declared here. */ |
159 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
160 | int rl_display_fixed = 0; | |
161 | ||
ccc6cda3 | 162 | int _rl_suppress_redisplay = 0; |
95732b49 | 163 | int _rl_want_redisplay = 0; |
ccc6cda3 | 164 | |
726f6388 JA |
165 | /* The stuff that gets printed out before the actual text of the line. |
166 | This is usually pointing to rl_prompt. */ | |
167 | char *rl_display_prompt = (char *)NULL; | |
168 | ||
a0c0a00f CR |
169 | /* Variables used to include the editing mode in the prompt. */ |
170 | char *_rl_emacs_mode_str; | |
171 | int _rl_emacs_modestr_len; | |
172 | ||
173 | char *_rl_vi_ins_mode_str; | |
174 | int _rl_vi_ins_modestr_len; | |
175 | ||
176 | char *_rl_vi_cmd_mode_str; | |
177 | int _rl_vi_cmd_modestr_len; | |
178 | ||
726f6388 | 179 | /* Pseudo-global variables declared here. */ |
95732b49 | 180 | |
726f6388 | 181 | /* The visible cursor position. If you print some text, adjust this. */ |
95732b49 JA |
182 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
183 | supporting multibyte characters, and an absolute cursor position when | |
184 | in such a locale. This is an artifact of the donated multibyte support. | |
185 | Care must be taken when modifying its value. */ | |
726f6388 JA |
186 | int _rl_last_c_pos = 0; |
187 | int _rl_last_v_pos = 0; | |
188 | ||
95732b49 | 189 | static int cpos_adjusted; |
0628567a | 190 | static int cpos_buffer_position; |
ac50fbac | 191 | static int displaying_prompt_first_line; |
3185942a | 192 | static int prompt_multibyte_chars; |
95732b49 | 193 | |
726f6388 JA |
194 | /* Number of lines currently on screen minus 1. */ |
195 | int _rl_vis_botlin = 0; | |
196 | ||
a0c0a00f CR |
197 | static int _rl_inv_botlin = 0; |
198 | ||
726f6388 JA |
199 | /* Variables used only in this file. */ |
200 | /* The last left edge of text that was displayed. This is used when | |
201 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 202 | static int last_lmargin; |
726f6388 | 203 | |
726f6388 | 204 | /* A buffer for `modeline' messages. */ |
ac50fbac CR |
205 | static char *msg_buf = 0; |
206 | static int msg_bufsiz = 0; | |
726f6388 JA |
207 | |
208 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 209 | static int forced_display; |
726f6388 JA |
210 | |
211 | /* Default and initial buffer size. Can grow. */ | |
212 | static int line_size = 1024; | |
213 | ||
28ef6c31 JA |
214 | /* Variables to keep track of the expanded prompt string, which may |
215 | include invisible characters. */ | |
216 | ||
726f6388 | 217 | static char *local_prompt, *local_prompt_prefix; |
0628567a | 218 | static int local_prompt_len; |
28ef6c31 | 219 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
220 | |
221 | /* The number of invisible characters in the line currently being | |
222 | displayed on the screen. */ | |
ccc6cda3 JA |
223 | static int visible_wrap_offset; |
224 | ||
28ef6c31 JA |
225 | /* The number of invisible characters in the prompt string. Static so it |
226 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
227 | static int wrap_offset; |
228 | ||
28ef6c31 JA |
229 | /* The index of the last invisible character in the prompt string. */ |
230 | static int prompt_last_invisible; | |
726f6388 JA |
231 | |
232 | /* The length (buffer offset) of the first line of the last (possibly | |
233 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 234 | static int visible_first_line_len; |
726f6388 | 235 | |
28ef6c31 JA |
236 | /* Number of invisible characters on the first physical line of the prompt. |
237 | Only valid when the number of physical characters in the prompt exceeds | |
238 | (or is equal to) _rl_screenwidth. */ | |
239 | static int prompt_invis_chars_first_line; | |
240 | ||
241 | static int prompt_last_screen_line; | |
242 | ||
b80f6443 JA |
243 | static int prompt_physical_chars; |
244 | ||
3185942a JA |
245 | /* set to a non-zero value by rl_redisplay if we are marking modified history |
246 | lines and the current line is so marked. */ | |
247 | static int modmark; | |
248 | ||
95732b49 JA |
249 | /* Variables to save and restore prompt and display information. */ |
250 | ||
251 | /* These are getting numerous enough that it's time to create a struct. */ | |
252 | ||
253 | static char *saved_local_prompt; | |
254 | static char *saved_local_prefix; | |
255 | static int saved_last_invisible; | |
256 | static int saved_visible_length; | |
257 | static int saved_prefix_length; | |
0628567a | 258 | static int saved_local_length; |
95732b49 JA |
259 | static int saved_invis_chars_first_line; |
260 | static int saved_physical_chars; | |
261 | ||
a0c0a00f CR |
262 | /* Return a string indicating the editing mode, for use in the prompt. */ |
263 | ||
264 | static char * | |
265 | prompt_modestr (lenp) | |
266 | int *lenp; | |
ac50fbac CR |
267 | { |
268 | if (rl_editing_mode == emacs_mode) | |
a0c0a00f CR |
269 | { |
270 | if (lenp) | |
271 | *lenp = _rl_emacs_mode_str ? _rl_emacs_modestr_len : RL_EMACS_MODESTR_DEFLEN; | |
272 | return _rl_emacs_mode_str ? _rl_emacs_mode_str : RL_EMACS_MODESTR_DEFAULT; | |
273 | } | |
ac50fbac | 274 | else if (_rl_keymap == vi_insertion_keymap) |
a0c0a00f CR |
275 | { |
276 | if (lenp) | |
277 | *lenp = _rl_vi_ins_mode_str ? _rl_vi_ins_modestr_len : RL_VI_INS_MODESTR_DEFLEN; | |
278 | return _rl_vi_ins_mode_str ? _rl_vi_ins_mode_str : RL_VI_INS_MODESTR_DEFAULT; /* vi insert mode */ | |
279 | } | |
ac50fbac | 280 | else |
a0c0a00f CR |
281 | { |
282 | if (lenp) | |
283 | *lenp = _rl_vi_cmd_mode_str ? _rl_vi_cmd_modestr_len : RL_VI_CMD_MODESTR_DEFLEN; | |
284 | return _rl_vi_cmd_mode_str ? _rl_vi_cmd_mode_str : RL_VI_CMD_MODESTR_DEFAULT; /* vi command mode */ | |
285 | } | |
ac50fbac CR |
286 | } |
287 | ||
726f6388 JA |
288 | /* Expand the prompt string S and return the number of visible |
289 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 290 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
291 | index of the last invisible character in the returned string. NIFLP, |
292 | if non-zero, is a place to store the number of invisible characters in | |
b80f6443 JA |
293 | the first prompt line. The previous are used as byte counts -- indexes |
294 | into a character buffer. */ | |
726f6388 JA |
295 | |
296 | /* Current implementation: | |
297 | \001 (^A) start non-visible characters | |
298 | \002 (^B) end non-visible characters | |
299 | all characters except \001 and \002 (following a \001) are copied to | |
300 | the returned string; all characters except those between \001 and | |
301 | \002 are assumed to be `visible'. */ | |
302 | ||
a0c0a00f CR |
303 | /* Possible values for FLAGS: |
304 | PMT_MULTILINE caller indicates that this is part of a multiline prompt | |
305 | */ | |
306 | ||
726f6388 | 307 | static char * |
a0c0a00f | 308 | expand_prompt (pmt, flags, lp, lip, niflp, vlp) |
726f6388 | 309 | char *pmt; |
a0c0a00f | 310 | int flags; |
b80f6443 | 311 | int *lp, *lip, *niflp, *vlp; |
726f6388 | 312 | { |
a0c0a00f | 313 | char *r, *ret, *p, *igstart, *nprompt, *ms; |
eb873671 | 314 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
a0c0a00f CR |
315 | int mlen; |
316 | ||
317 | /* We only expand the mode string for the last line of a multiline prompt | |
318 | (a prompt with embedded newlines). */ | |
319 | ms = (((pmt == rl_prompt) ^ (flags & PMT_MULTILINE)) && _rl_show_mode_in_prompt) ? prompt_modestr (&mlen) : 0; | |
320 | if (ms) | |
321 | { | |
322 | l = strlen (pmt); | |
323 | nprompt = (char *)xmalloc (l + mlen + 1); | |
324 | memcpy (nprompt, ms, mlen); | |
325 | strcpy (nprompt + mlen, pmt); | |
326 | } | |
327 | else | |
328 | nprompt = pmt; | |
726f6388 JA |
329 | |
330 | /* Short-circuit if we can. */ | |
a0c0a00f | 331 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (nprompt, RL_PROMPT_START_IGNORE) == 0) |
726f6388 | 332 | { |
a0c0a00f | 333 | r = (nprompt == pmt) ? savestring (pmt) : nprompt; |
ac50fbac | 334 | |
726f6388 JA |
335 | if (lp) |
336 | *lp = strlen (r); | |
b80f6443 JA |
337 | if (lip) |
338 | *lip = 0; | |
339 | if (niflp) | |
340 | *niflp = 0; | |
341 | if (vlp) | |
342 | *vlp = lp ? *lp : strlen (r); | |
726f6388 JA |
343 | return r; |
344 | } | |
345 | ||
a0c0a00f CR |
346 | l = strlen (nprompt); /* XXX */ |
347 | r = ret = (char *)xmalloc (l + 1); | |
28ef6c31 | 348 | |
a0c0a00f | 349 | rl = physchars = 0; /* mode string now part of nprompt */ |
28ef6c31 | 350 | invfl = 0; /* invisible chars in first line of prompt */ |
eb873671 | 351 | invflset = 0; /* we only want to set invfl once */ |
0628567a | 352 | igstart = 0; |
a0c0a00f CR |
353 | |
354 | for (ignoring = last = ninvis = 0, p = nprompt; p && *p; p++) | |
726f6388 JA |
355 | { |
356 | /* This code strips the invisible character string markers | |
357 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
0628567a | 358 | if (ignoring == 0 && *p == RL_PROMPT_START_IGNORE) /* XXX - check ignoring? */ |
726f6388 | 359 | { |
0628567a JA |
360 | ignoring = 1; |
361 | igstart = p; | |
726f6388 JA |
362 | continue; |
363 | } | |
364 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
365 | { | |
366 | ignoring = 0; | |
0628567a | 367 | if (p != (igstart + 1)) |
95732b49 | 368 | last = r - ret - 1; |
726f6388 JA |
369 | continue; |
370 | } | |
371 | else | |
372 | { | |
b80f6443 JA |
373 | #if defined (HANDLE_MULTIBYTE) |
374 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
375 | { | |
a0c0a00f CR |
376 | pind = p - nprompt; |
377 | ind = _rl_find_next_mbchar (nprompt, pind, 1, MB_FIND_NONZERO); | |
b80f6443 JA |
378 | l = ind - pind; |
379 | while (l--) | |
380 | *r++ = *p++; | |
381 | if (!ignoring) | |
eb873671 | 382 | { |
3185942a JA |
383 | /* rl ends up being assigned to prompt_visible_length, |
384 | which is the number of characters in the buffer that | |
385 | contribute to characters on the screen, which might | |
386 | not be the same as the number of physical characters | |
387 | on the screen in the presence of multibyte characters */ | |
eb873671 | 388 | rl += ind - pind; |
a0c0a00f | 389 | physchars += _rl_col_width (nprompt, pind, ind, 0); |
eb873671 | 390 | } |
b80f6443 JA |
391 | else |
392 | ninvis += ind - pind; | |
393 | p--; /* compensate for later increment */ | |
394 | } | |
28ef6c31 | 395 | else |
b80f6443 JA |
396 | #endif |
397 | { | |
398 | *r++ = *p; | |
399 | if (!ignoring) | |
eb873671 JA |
400 | { |
401 | rl++; /* visible length byte counter */ | |
402 | physchars++; | |
403 | } | |
b80f6443 JA |
404 | else |
405 | ninvis++; /* invisible chars byte counter */ | |
406 | } | |
407 | ||
eb873671 JA |
408 | if (invflset == 0 && rl >= _rl_screenwidth) |
409 | { | |
410 | invfl = ninvis; | |
411 | invflset = 1; | |
412 | } | |
726f6388 JA |
413 | } |
414 | } | |
415 | ||
28ef6c31 JA |
416 | if (rl < _rl_screenwidth) |
417 | invfl = ninvis; | |
418 | ||
726f6388 JA |
419 | *r = '\0'; |
420 | if (lp) | |
421 | *lp = rl; | |
ccc6cda3 JA |
422 | if (lip) |
423 | *lip = last; | |
28ef6c31 JA |
424 | if (niflp) |
425 | *niflp = invfl; | |
b80f6443 JA |
426 | if (vlp) |
427 | *vlp = physchars; | |
a0c0a00f CR |
428 | |
429 | if (nprompt != pmt) | |
430 | free (nprompt); | |
431 | ||
726f6388 JA |
432 | return ret; |
433 | } | |
434 | ||
bb70624e JA |
435 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
436 | PMT and return the rest of PMT. */ | |
437 | char * | |
438 | _rl_strip_prompt (pmt) | |
439 | char *pmt; | |
440 | { | |
441 | char *ret; | |
442 | ||
a0c0a00f | 443 | ret = expand_prompt (pmt, 0, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
444 | return ret; |
445 | } | |
446 | ||
ac50fbac CR |
447 | void |
448 | _rl_reset_prompt () | |
449 | { | |
450 | rl_visible_prompt_length = rl_expand_prompt (rl_prompt); | |
451 | } | |
452 | ||
726f6388 JA |
453 | /* |
454 | * Expand the prompt string into the various display components, if | |
455 | * necessary. | |
456 | * | |
457 | * local_prompt = expanded last line of string in rl_display_prompt | |
458 | * (portion after the final newline) | |
459 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
460 | * expanded via expand_prompt | |
28ef6c31 JA |
461 | * prompt_visible_length = number of visible characters in local_prompt |
462 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
463 | * |
464 | * This function is called once per call to readline(). It may also be | |
465 | * called arbitrarily to expand the primary prompt. | |
466 | * | |
467 | * The return value is the number of visible characters on the last line | |
468 | * of the (possibly multi-line) prompt. | |
469 | */ | |
470 | int | |
471 | rl_expand_prompt (prompt) | |
472 | char *prompt; | |
473 | { | |
474 | char *p, *t; | |
475 | int c; | |
476 | ||
477 | /* Clear out any saved values. */ | |
28ef6c31 JA |
478 | FREE (local_prompt); |
479 | FREE (local_prompt_prefix); | |
480 | ||
726f6388 | 481 | local_prompt = local_prompt_prefix = (char *)0; |
0628567a | 482 | local_prompt_len = 0; |
95732b49 JA |
483 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
484 | prompt_visible_length = prompt_physical_chars = 0; | |
726f6388 | 485 | |
ccc6cda3 | 486 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
487 | return (0); |
488 | ||
489 | p = strrchr (prompt, '\n'); | |
a0c0a00f | 490 | if (p == 0) |
726f6388 | 491 | { |
28ef6c31 | 492 | /* The prompt is only one logical line, though it might wrap. */ |
a0c0a00f CR |
493 | local_prompt = expand_prompt (prompt, 0, &prompt_visible_length, |
494 | &prompt_last_invisible, | |
495 | &prompt_invis_chars_first_line, | |
496 | &prompt_physical_chars); | |
726f6388 | 497 | local_prompt_prefix = (char *)0; |
0628567a | 498 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 499 | return (prompt_visible_length); |
726f6388 JA |
500 | } |
501 | else | |
502 | { | |
503 | /* The prompt spans multiple lines. */ | |
504 | t = ++p; | |
a0c0a00f CR |
505 | local_prompt = expand_prompt (p, PMT_MULTILINE, |
506 | &prompt_visible_length, | |
28ef6c31 | 507 | &prompt_last_invisible, |
f1be666c | 508 | &prompt_invis_chars_first_line, |
eb873671 | 509 | &prompt_physical_chars); |
726f6388 JA |
510 | c = *t; *t = '\0'; |
511 | /* The portion of the prompt string up to and including the | |
512 | final newline is now null-terminated. */ | |
a0c0a00f CR |
513 | local_prompt_prefix = expand_prompt (prompt, PMT_MULTILINE, |
514 | &prompt_prefix_length, | |
28ef6c31 | 515 | (int *)NULL, |
f1be666c | 516 | (int *)NULL, |
eb873671 | 517 | (int *)NULL); |
726f6388 | 518 | *t = c; |
0628567a | 519 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
28ef6c31 | 520 | return (prompt_prefix_length); |
726f6388 JA |
521 | } |
522 | } | |
523 | ||
bb70624e JA |
524 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
525 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
526 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
527 | increased. If the lines have already been allocated, this ensures that | |
528 | they can hold at least MINSIZE characters. */ | |
529 | static void | |
530 | init_line_structures (minsize) | |
531 | int minsize; | |
532 | { | |
533 | register int n; | |
534 | ||
535 | if (invisible_line == 0) /* initialize it */ | |
536 | { | |
537 | if (line_size < minsize) | |
538 | line_size = minsize; | |
f73dda09 JA |
539 | visible_line = (char *)xmalloc (line_size); |
540 | invisible_line = (char *)xmalloc (line_size); | |
bb70624e JA |
541 | } |
542 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
543 | { | |
544 | line_size *= 2; | |
545 | if (line_size < minsize) | |
546 | line_size = minsize; | |
f73dda09 JA |
547 | visible_line = (char *)xrealloc (visible_line, line_size); |
548 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
bb70624e JA |
549 | } |
550 | ||
551 | for (n = minsize; n < line_size; n++) | |
552 | { | |
553 | visible_line[n] = 0; | |
554 | invisible_line[n] = 1; | |
555 | } | |
556 | ||
557 | if (vis_lbreaks == 0) | |
558 | { | |
559 | /* should be enough. */ | |
560 | inv_lbsize = vis_lbsize = 256; | |
3185942a | 561 | |
7117c2d2 | 562 | #if defined (HANDLE_MULTIBYTE) |
3185942a JA |
563 | line_state_visible->wbsize = vis_lbsize; |
564 | line_state_visible->wrapped_line = (int *)xmalloc (line_state_visible->wbsize * sizeof (int)); | |
565 | ||
566 | line_state_invisible->wbsize = inv_lbsize; | |
567 | line_state_invisible->wrapped_line = (int *)xmalloc (line_state_invisible->wbsize * sizeof (int)); | |
7117c2d2 | 568 | #endif |
3185942a JA |
569 | |
570 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
571 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
bb70624e JA |
572 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
573 | } | |
3185942a JA |
574 | |
575 | line_structures_initialized = 1; | |
bb70624e JA |
576 | } |
577 | ||
726f6388 JA |
578 | /* Basic redisplay algorithm. */ |
579 | void | |
580 | rl_redisplay () | |
581 | { | |
ccc6cda3 JA |
582 | register int in, out, c, linenum, cursor_linenum; |
583 | register char *line; | |
0628567a | 584 | int inv_botlin, lb_botlin, lb_linenum, o_cpos; |
3185942a | 585 | int newlines, lpos, temp, n0, num, prompt_lines_estimate; |
726f6388 | 586 | char *prompt_this_line; |
a0c0a00f | 587 | int mb_cur_max = MB_CUR_MAX; |
7117c2d2 JA |
588 | #if defined (HANDLE_MULTIBYTE) |
589 | wchar_t wc; | |
590 | size_t wc_bytes; | |
591 | int wc_width; | |
592 | mbstate_t ps; | |
593 | int _rl_wrapped_multicolumn = 0; | |
594 | #endif | |
726f6388 | 595 | |
3185942a | 596 | if (_rl_echoing_p == 0) |
726f6388 JA |
597 | return; |
598 | ||
3185942a JA |
599 | /* Block keyboard interrupts because this function manipulates global |
600 | data structures. */ | |
601 | _rl_block_sigint (); | |
89a92869 | 602 | RL_SETSTATE (RL_STATE_REDISPLAYING); |
3185942a | 603 | |
726f6388 JA |
604 | if (!rl_display_prompt) |
605 | rl_display_prompt = ""; | |
606 | ||
3185942a | 607 | if (line_structures_initialized == 0) |
726f6388 | 608 | { |
bb70624e | 609 | init_line_structures (0); |
726f6388 JA |
610 | rl_on_new_line (); |
611 | } | |
612 | ||
613 | /* Draw the line into the buffer. */ | |
0628567a | 614 | cpos_buffer_position = -1; |
726f6388 | 615 | |
3185942a JA |
616 | prompt_multibyte_chars = prompt_visible_length - prompt_physical_chars; |
617 | ||
ccc6cda3 JA |
618 | line = invisible_line; |
619 | out = inv_botlin = 0; | |
620 | ||
726f6388 JA |
621 | /* Mark the line as modified or not. We only do this for history |
622 | lines. */ | |
b80f6443 | 623 | modmark = 0; |
726f6388 JA |
624 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
625 | { | |
626 | line[out++] = '*'; | |
627 | line[out] = '\0'; | |
b80f6443 | 628 | modmark = 1; |
726f6388 JA |
629 | } |
630 | ||
631 | /* If someone thought that the redisplay was handled, but the currently | |
632 | visible line has a different modification state than the one about | |
633 | to become visible, then correct the caller's misconception. */ | |
634 | if (visible_line[0] != invisible_line[0]) | |
635 | rl_display_fixed = 0; | |
636 | ||
637 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
638 | one passed to readline()), use the values we have already expanded. | |
639 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
640 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 641 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 | 642 | { |
726f6388 JA |
643 | if (local_prompt_prefix && forced_display) |
644 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
645 | ||
0628567a | 646 | if (local_prompt_len > 0) |
ccc6cda3 | 647 | { |
0628567a | 648 | temp = local_prompt_len + out + 2; |
b72432fd JA |
649 | if (temp >= line_size) |
650 | { | |
651 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
652 | visible_line = (char *)xrealloc (visible_line, line_size); |
653 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 654 | } |
0628567a JA |
655 | strncpy (line + out, local_prompt, local_prompt_len); |
656 | out += local_prompt_len; | |
ccc6cda3 | 657 | } |
726f6388 | 658 | line[out] = '\0'; |
0628567a | 659 | wrap_offset = local_prompt_len - prompt_visible_length; |
726f6388 JA |
660 | } |
661 | else | |
662 | { | |
663 | int pmtlen; | |
664 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
665 | if (!prompt_this_line) | |
666 | prompt_this_line = rl_display_prompt; | |
667 | else | |
668 | { | |
669 | prompt_this_line++; | |
bb70624e | 670 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 671 | if (forced_display) |
ccc6cda3 | 672 | { |
bb70624e | 673 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
674 | /* Make sure we are at column zero even after a newline, |
675 | regardless of the state of terminal output processing. */ | |
bb70624e | 676 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
677 | cr (); |
678 | } | |
726f6388 JA |
679 | } |
680 | ||
b80f6443 | 681 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
b72432fd JA |
682 | temp = pmtlen + out + 2; |
683 | if (temp >= line_size) | |
684 | { | |
685 | line_size = (temp + 1024) - (temp % 1024); | |
f73dda09 JA |
686 | visible_line = (char *)xrealloc (visible_line, line_size); |
687 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
b72432fd | 688 | } |
726f6388 JA |
689 | strncpy (line + out, prompt_this_line, pmtlen); |
690 | out += pmtlen; | |
691 | line[out] = '\0'; | |
28ef6c31 | 692 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
693 | } |
694 | ||
bb70624e JA |
695 | #define CHECK_INV_LBREAKS() \ |
696 | do { \ | |
697 | if (newlines >= (inv_lbsize - 2)) \ | |
698 | { \ | |
699 | inv_lbsize *= 2; \ | |
700 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
701 | } \ | |
702 | } while (0) | |
7117c2d2 JA |
703 | |
704 | #if defined (HANDLE_MULTIBYTE) | |
ccc6cda3 JA |
705 | #define CHECK_LPOS() \ |
706 | do { \ | |
b72432fd | 707 | lpos++; \ |
28ef6c31 | 708 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 709 | { \ |
bb70624e JA |
710 | if (newlines >= (inv_lbsize - 2)) \ |
711 | { \ | |
712 | inv_lbsize *= 2; \ | |
713 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
714 | } \ | |
b72432fd | 715 | inv_lbreaks[++newlines] = out; \ |
3185942a JA |
716 | if (newlines >= (line_state_invisible->wbsize - 1)) \ |
717 | { \ | |
718 | line_state_invisible->wbsize *= 2; \ | |
719 | line_state_invisible->wrapped_line = (int *)xrealloc (line_state_invisible->wrapped_line, line_state_invisible->wbsize * sizeof(int)); \ | |
720 | } \ | |
721 | line_state_invisible->wrapped_line[newlines] = _rl_wrapped_multicolumn; \ | |
b72432fd JA |
722 | lpos = 0; \ |
723 | } \ | |
ccc6cda3 | 724 | } while (0) |
7117c2d2 JA |
725 | #else |
726 | #define CHECK_LPOS() \ | |
727 | do { \ | |
728 | lpos++; \ | |
729 | if (lpos >= _rl_screenwidth) \ | |
730 | { \ | |
731 | if (newlines >= (inv_lbsize - 2)) \ | |
732 | { \ | |
733 | inv_lbsize *= 2; \ | |
734 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
735 | } \ | |
736 | inv_lbreaks[++newlines] = out; \ | |
737 | lpos = 0; \ | |
738 | } \ | |
739 | } while (0) | |
740 | #endif | |
ccc6cda3 JA |
741 | |
742 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
743 | inv_lbreaks[newlines = 0] = 0; | |
a0c0a00f CR |
744 | /* lpos is a physical cursor position, so it needs to be adjusted by the |
745 | number of invisible characters in the prompt, per line */ | |
b80f6443 | 746 | lpos = prompt_physical_chars + modmark; |
b80f6443 | 747 | |
7117c2d2 | 748 | #if defined (HANDLE_MULTIBYTE) |
3185942a | 749 | memset (line_state_invisible->wrapped_line, 0, line_state_invisible->wbsize * sizeof (int)); |
eb873671 | 750 | num = 0; |
7117c2d2 | 751 | #endif |
d166f048 | 752 | |
28ef6c31 JA |
753 | /* prompt_invis_chars_first_line is the number of invisible characters in |
754 | the first physical line of the prompt. | |
755 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
3185942a JA |
756 | chars on the second (or, more generally, last) line. */ |
757 | ||
758 | /* This is zero-based, used to set the newlines */ | |
759 | prompt_lines_estimate = lpos / _rl_screenwidth; | |
28ef6c31 JA |
760 | |
761 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 762 | contents of the command line? */ |
28ef6c31 | 763 | while (lpos >= _rl_screenwidth) |
d166f048 | 764 | { |
a0c0a00f CR |
765 | int z, p; |
766 | int nocorrect, wadjust; | |
767 | ||
768 | nocorrect = 0; | |
769 | /* Adjust depending on the invisible characters in the line. We use a | |
770 | heuristic based on experience: invisible characters nearly always | |
771 | appear in the first and last lines of the prompt */ | |
772 | wadjust = (newlines == 0) | |
773 | ? prompt_invis_chars_first_line | |
b0776d8c CR |
774 | : ((newlines == prompt_lines_estimate) |
775 | ? (wrap_offset - prompt_invis_chars_first_line) | |
776 | : 0); | |
a0c0a00f | 777 | |
28ef6c31 JA |
778 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
779 | invisible characters that is longer than the screen width. The | |
780 | prompt_invis_chars_first_line variable could be made into an array | |
781 | saying how many invisible characters there are per line, but that's | |
782 | probably too much work for the benefit gained. How many people have | |
b80f6443 JA |
783 | prompts that exceed two physical lines? |
784 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ | |
eb873671 | 785 | #if defined (HANDLE_MULTIBYTE) |
a0c0a00f | 786 | if (mb_cur_max > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) |
eb873671 | 787 | { |
a0c0a00f | 788 | nocorrect = 1; |
0628567a JA |
789 | n0 = num; |
790 | temp = local_prompt_len; | |
791 | while (num < temp) | |
eb873671 | 792 | { |
a0c0a00f CR |
793 | /* This has to take invisible characters in the prompt into |
794 | account. */ | |
795 | z = _rl_col_width (local_prompt, n0, num, 1) - wadjust; | |
0628567a JA |
796 | if (z > _rl_screenwidth) |
797 | { | |
798 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
799 | break; | |
800 | } | |
801 | else if (z == _rl_screenwidth) | |
a0c0a00f CR |
802 | { |
803 | /* If we are in the middle or at the end of a multibyte | |
804 | character, we want to move to the start, then find out | |
805 | where it ends so we know where to insert the newline. | |
806 | If this isn't a multibyte character, its the same as num++ */ | |
807 | p = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); | |
808 | num = _rl_find_next_mbchar (local_prompt, p, 1, MB_FIND_ANY); | |
809 | break; | |
810 | } | |
0628567a | 811 | num++; |
eb873671 | 812 | } |
0628567a | 813 | temp = num; |
eb873671 | 814 | } |
0628567a | 815 | else |
eb873671 | 816 | #endif /* !HANDLE_MULTIBYTE */ |
0628567a JA |
817 | temp = ((newlines + 1) * _rl_screenwidth); |
818 | ||
819 | /* Now account for invisible characters in the current line. */ | |
3185942a JA |
820 | /* XXX - this assumes that the invisible characters may be split, but only |
821 | between the first and the last lines. */ | |
a0c0a00f CR |
822 | if (nocorrect == 0) |
823 | temp += wadjust; | |
ac50fbac | 824 | |
d166f048 | 825 | inv_lbreaks[++newlines] = temp; |
eb873671 | 826 | #if defined (HANDLE_MULTIBYTE) |
a0c0a00f CR |
827 | /* lpos is a physical cursor position, so it needs to take the invisible |
828 | characters into account. */ | |
829 | if (mb_cur_max > 1 && rl_byte_oriented == 0 && prompt_multibyte_chars > 0) | |
830 | lpos -= _rl_col_width (local_prompt, n0, num, 1) - wadjust; | |
0628567a | 831 | else |
eb873671 | 832 | #endif |
a0c0a00f | 833 | lpos -= _rl_screenwidth; /* all physical cursor positions */ |
d166f048 | 834 | } |
ccc6cda3 | 835 | |
28ef6c31 JA |
836 | prompt_last_screen_line = newlines; |
837 | ||
838 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
0628567a | 839 | track of where the cursor is (cpos_buffer_position), the number of the line containing |
28ef6c31 JA |
840 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
841 | It maintains an array of line breaks for display (inv_lbreaks). | |
842 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 | 843 | lb_linenum = 0; |
7117c2d2 JA |
844 | #if defined (HANDLE_MULTIBYTE) |
845 | in = 0; | |
a0c0a00f | 846 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
847 | { |
848 | memset (&ps, 0, sizeof (mbstate_t)); | |
0001803f | 849 | /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */ |
7117c2d2 JA |
850 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); |
851 | } | |
852 | else | |
853 | wc_bytes = 1; | |
854 | while (in < rl_end) | |
855 | #else | |
d166f048 | 856 | for (in = 0; in < rl_end; in++) |
7117c2d2 | 857 | #endif |
726f6388 JA |
858 | { |
859 | c = (unsigned char)rl_line_buffer[in]; | |
860 | ||
7117c2d2 | 861 | #if defined (HANDLE_MULTIBYTE) |
a0c0a00f | 862 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 | 863 | { |
b80f6443 | 864 | if (MB_INVALIDCH (wc_bytes)) |
7117c2d2 JA |
865 | { |
866 | /* Byte sequence is invalid or shortened. Assume that the | |
867 | first byte represents a character. */ | |
868 | wc_bytes = 1; | |
869 | /* Assume that a character occupies a single column. */ | |
870 | wc_width = 1; | |
871 | memset (&ps, 0, sizeof (mbstate_t)); | |
872 | } | |
b80f6443 | 873 | else if (MB_NULLWCH (wc_bytes)) |
7117c2d2 JA |
874 | break; /* Found '\0' */ |
875 | else | |
876 | { | |
ac50fbac | 877 | temp = WCWIDTH (wc); |
b80f6443 | 878 | wc_width = (temp >= 0) ? temp : 1; |
7117c2d2 JA |
879 | } |
880 | } | |
881 | #endif | |
882 | ||
726f6388 JA |
883 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
884 | { | |
885 | line_size *= 2; | |
f73dda09 JA |
886 | visible_line = (char *)xrealloc (visible_line, line_size); |
887 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
726f6388 JA |
888 | line = invisible_line; |
889 | } | |
890 | ||
891 | if (in == rl_point) | |
ccc6cda3 | 892 | { |
0628567a | 893 | cpos_buffer_position = out; |
ccc6cda3 JA |
894 | lb_linenum = newlines; |
895 | } | |
726f6388 | 896 | |
7117c2d2 JA |
897 | #if defined (HANDLE_MULTIBYTE) |
898 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
899 | #else | |
726f6388 | 900 | if (META_CHAR (c)) |
7117c2d2 | 901 | #endif |
726f6388 JA |
902 | { |
903 | if (_rl_output_meta_chars == 0) | |
904 | { | |
905 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 906 | |
28ef6c31 | 907 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 908 | { |
28ef6c31 | 909 | temp = _rl_screenwidth - lpos; |
bb70624e | 910 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
911 | inv_lbreaks[++newlines] = out + temp; |
912 | lpos = 4 - temp; | |
913 | } | |
914 | else | |
915 | lpos += 4; | |
916 | ||
726f6388 JA |
917 | out += 4; |
918 | } | |
919 | else | |
ccc6cda3 JA |
920 | { |
921 | line[out++] = c; | |
922 | CHECK_LPOS(); | |
923 | } | |
726f6388 JA |
924 | } |
925 | #if defined (DISPLAY_TABS) | |
926 | else if (c == '\t') | |
927 | { | |
28ef6c31 | 928 | register int newout; |
b72432fd JA |
929 | |
930 | #if 0 | |
ccc6cda3 | 931 | newout = (out | (int)7) + 1; |
b72432fd JA |
932 | #else |
933 | newout = out + 8 - lpos % 8; | |
934 | #endif | |
ccc6cda3 | 935 | temp = newout - out; |
28ef6c31 | 936 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
937 | { |
938 | register int temp2; | |
28ef6c31 | 939 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 940 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
941 | inv_lbreaks[++newlines] = out + temp2; |
942 | lpos = temp - temp2; | |
943 | while (out < newout) | |
944 | line[out++] = ' '; | |
945 | } | |
946 | else | |
947 | { | |
948 | while (out < newout) | |
949 | line[out++] = ' '; | |
950 | lpos += temp; | |
951 | } | |
726f6388 JA |
952 | } |
953 | #endif | |
28ef6c31 | 954 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
955 | { |
956 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 957 | CHECK_INV_LBREAKS (); |
b72432fd JA |
958 | inv_lbreaks[++newlines] = out; |
959 | lpos = 0; | |
960 | } | |
ccc6cda3 | 961 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
962 | { |
963 | line[out++] = '^'; | |
ccc6cda3 JA |
964 | CHECK_LPOS(); |
965 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
966 | CHECK_LPOS(); | |
726f6388 | 967 | } |
ccc6cda3 | 968 | else |
726f6388 | 969 | { |
7117c2d2 | 970 | #if defined (HANDLE_MULTIBYTE) |
a0c0a00f | 971 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
972 | { |
973 | register int i; | |
974 | ||
975 | _rl_wrapped_multicolumn = 0; | |
976 | ||
977 | if (_rl_screenwidth < lpos + wc_width) | |
978 | for (i = lpos; i < _rl_screenwidth; i++) | |
979 | { | |
980 | /* The space will be removed in update_line() */ | |
981 | line[out++] = ' '; | |
982 | _rl_wrapped_multicolumn++; | |
983 | CHECK_LPOS(); | |
984 | } | |
985 | if (in == rl_point) | |
986 | { | |
0628567a | 987 | cpos_buffer_position = out; |
7117c2d2 JA |
988 | lb_linenum = newlines; |
989 | } | |
990 | for (i = in; i < in+wc_bytes; i++) | |
991 | line[out++] = rl_line_buffer[i]; | |
992 | for (i = 0; i < wc_width; i++) | |
993 | CHECK_LPOS(); | |
994 | } | |
995 | else | |
996 | { | |
997 | line[out++] = c; | |
998 | CHECK_LPOS(); | |
999 | } | |
1000 | #else | |
ccc6cda3 JA |
1001 | line[out++] = c; |
1002 | CHECK_LPOS(); | |
7117c2d2 JA |
1003 | #endif |
1004 | } | |
1005 | ||
1006 | #if defined (HANDLE_MULTIBYTE) | |
a0c0a00f | 1007 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
1008 | { |
1009 | in += wc_bytes; | |
0001803f | 1010 | /* XXX - what if wc_bytes ends up <= 0? check for MB_INVALIDCH */ |
7117c2d2 | 1011 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); |
726f6388 | 1012 | } |
7117c2d2 JA |
1013 | else |
1014 | in++; | |
1015 | #endif | |
1016 | ||
726f6388 JA |
1017 | } |
1018 | line[out] = '\0'; | |
0628567a | 1019 | if (cpos_buffer_position < 0) |
ccc6cda3 | 1020 | { |
0628567a | 1021 | cpos_buffer_position = out; |
ccc6cda3 JA |
1022 | lb_linenum = newlines; |
1023 | } | |
1024 | ||
a0c0a00f | 1025 | inv_botlin = lb_botlin = _rl_inv_botlin = newlines; |
bb70624e | 1026 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
1027 | inv_lbreaks[newlines+1] = out; |
1028 | cursor_linenum = lb_linenum; | |
726f6388 | 1029 | |
0628567a | 1030 | /* CPOS_BUFFER_POSITION == position in buffer where cursor should be placed. |
28ef6c31 | 1031 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
726f6388 JA |
1032 | |
1033 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
1034 | line buffers are really multiple lines, which would wrap every | |
1035 | (screenwidth - 1) characters. Go through each in turn, finding | |
1036 | the changed region and updating it. The line order is top to bottom. */ | |
1037 | ||
1038 | /* If we can move the cursor up and down, then use multiple lines, | |
1039 | otherwise, let long lines display in a single terminal line, and | |
1040 | horizontally scroll it. */ | |
ac50fbac | 1041 | displaying_prompt_first_line = 1; |
28ef6c31 | 1042 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 1043 | { |
95732b49 | 1044 | int nleft, pos, changed_screen_line, tx; |
726f6388 JA |
1045 | |
1046 | if (!rl_display_fixed || forced_display) | |
1047 | { | |
1048 | forced_display = 0; | |
1049 | ||
1050 | /* If we have more than a screenful of material to display, then | |
1051 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 1052 | not the first. */ |
28ef6c31 | 1053 | if (out >= _rl_screenchars) |
7117c2d2 | 1054 | { |
a0c0a00f CR |
1055 | #if defined (HANDLE_MULTIBYTE) |
1056 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
7117c2d2 JA |
1057 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); |
1058 | else | |
a0c0a00f | 1059 | #endif |
7117c2d2 JA |
1060 | out = _rl_screenchars - 1; |
1061 | } | |
726f6388 JA |
1062 | |
1063 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
1064 | second and subsequent lines start at inv_lbreaks[N], offset by |
1065 | OFFSET (which has already been calculated above). */ | |
726f6388 | 1066 | |
f1be666c JA |
1067 | #define INVIS_FIRST() (prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset) |
1068 | #define WRAP_OFFSET(line, offset) ((line == 0) \ | |
1069 | ? (offset ? INVIS_FIRST() : 0) \ | |
1070 | : ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0)) | |
726f6388 | 1071 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) |
ccc6cda3 JA |
1072 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
1073 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
1074 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 1075 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 1076 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 | 1077 | |
0001803f CR |
1078 | #define OLD_CPOS_IN_PROMPT() (cpos_adjusted == 0 && \ |
1079 | _rl_last_c_pos != o_cpos && \ | |
1080 | _rl_last_c_pos > wrap_offset && \ | |
1081 | o_cpos < prompt_last_invisible) | |
1082 | ||
726f6388 JA |
1083 | /* For each line in the buffer, do the updating display. */ |
1084 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
1085 | { | |
0628567a JA |
1086 | /* This can lead us astray if we execute a program that changes |
1087 | the locale from a non-multibyte to a multibyte one. */ | |
95732b49 JA |
1088 | o_cpos = _rl_last_c_pos; |
1089 | cpos_adjusted = 0; | |
726f6388 | 1090 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
ccc6cda3 | 1091 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 | 1092 | |
95732b49 JA |
1093 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
1094 | take invisible characters into account, since _rl_last_c_pos | |
1095 | is an absolute cursor position in a multibyte locale. See | |
1096 | if compensating here is the right thing, or if we have to | |
3185942a | 1097 | change update_line itself. There are several cases in which |
95732b49 JA |
1098 | update_line adjusts _rl_last_c_pos itself (so it can pass |
1099 | _rl_move_cursor_relative accurate values); it communicates | |
0628567a JA |
1100 | this back by setting cpos_adjusted. If we assume that |
1101 | _rl_last_c_pos is correct (an absolute cursor position) each | |
1102 | time update_line is called, then we can assume in our | |
1103 | calculations that o_cpos does not need to be adjusted by | |
1104 | wrap_offset. */ | |
a0c0a00f | 1105 | if (linenum == 0 && (mb_cur_max > 1 && rl_byte_oriented == 0) && OLD_CPOS_IN_PROMPT()) |
f1be666c JA |
1106 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ |
1107 | else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth && | |
a0c0a00f | 1108 | (mb_cur_max > 1 && rl_byte_oriented == 0) && |
f1be666c JA |
1109 | cpos_adjusted == 0 && |
1110 | _rl_last_c_pos != o_cpos && | |
1111 | _rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line)) | |
1112 | _rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line); | |
a0c0a00f | 1113 | |
726f6388 JA |
1114 | /* If this is the line with the prompt, we might need to |
1115 | compensate for invisible characters in the new line. Do | |
1116 | this only if there is not more than one new line (which | |
1117 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
1118 | and the new line is shorter than the old. Make sure we are |
1119 | at the end of the new line before clearing. */ | |
726f6388 | 1120 | if (linenum == 0 && |
ccc6cda3 | 1121 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
1122 | (wrap_offset > visible_wrap_offset) && |
1123 | (_rl_last_c_pos < visible_first_line_len)) | |
1124 | { | |
a0c0a00f | 1125 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
95732b49 JA |
1126 | nleft = _rl_screenwidth - _rl_last_c_pos; |
1127 | else | |
1128 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; | |
726f6388 | 1129 | if (nleft) |
d166f048 | 1130 | _rl_clear_to_eol (nleft); |
726f6388 | 1131 | } |
3185942a JA |
1132 | #if 0 |
1133 | /* This segment is intended to handle the case where the prompt | |
1134 | has invisible characters on the second line and the new line | |
1135 | to be displayed needs to clear the rest of the old characters | |
1136 | out (e.g., when printing the i-search prompt). In general, | |
1137 | the case of the new line being shorter than the old. | |
1138 | Incomplete */ | |
1139 | else if (linenum == prompt_last_screen_line && | |
1140 | prompt_physical_chars > _rl_screenwidth && | |
1141 | wrap_offset != prompt_invis_chars_first_line && | |
1142 | _rl_last_c_pos == out && | |
1143 | #endif | |
1144 | ||
726f6388 JA |
1145 | |
1146 | /* Since the new first line is now visible, save its length. */ | |
1147 | if (linenum == 0) | |
ccc6cda3 | 1148 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
1149 | } |
1150 | ||
1151 | /* We may have deleted some lines. If so, clear the left over | |
1152 | blank ones at the bottom out. */ | |
1153 | if (_rl_vis_botlin > inv_botlin) | |
1154 | { | |
1155 | char *tt; | |
1156 | for (; linenum <= _rl_vis_botlin; linenum++) | |
1157 | { | |
1158 | tt = VIS_CHARS (linenum); | |
1159 | _rl_move_vert (linenum); | |
1160 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 1161 | _rl_clear_to_eol |
28ef6c31 | 1162 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
1163 | } |
1164 | } | |
1165 | _rl_vis_botlin = inv_botlin; | |
1166 | ||
726f6388 JA |
1167 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
1168 | different screen line during this redisplay. */ | |
1169 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
1170 | if (changed_screen_line) | |
1171 | { | |
1172 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 1173 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
1174 | the physical cursor position on the screen stays the same, |
1175 | but the buffer position needs to be adjusted to account | |
1176 | for invisible characters. */ | |
a0c0a00f | 1177 | if ((mb_cur_max == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
b72432fd | 1178 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
1179 | } |
1180 | ||
1181 | /* We have to reprint the prompt if it contains invisible | |
1182 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
1183 | the characters from the current cursor position. But we |
1184 | only need to reprint it if the cursor is before the last | |
1185 | invisible character in the prompt string. */ | |
28ef6c31 | 1186 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1187 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
0628567a JA |
1188 | #if 0 |
1189 | _rl_last_c_pos <= PROMPT_ENDING_INDEX && local_prompt) | |
1190 | #else | |
1191 | _rl_last_c_pos < PROMPT_ENDING_INDEX && local_prompt) | |
1192 | #endif | |
726f6388 | 1193 | { |
bb70624e JA |
1194 | #if defined (__MSDOS__) |
1195 | putc ('\r', rl_outstream); | |
1196 | #else | |
28ef6c31 JA |
1197 | if (_rl_term_cr) |
1198 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 1199 | #endif |
3185942a JA |
1200 | if (modmark) |
1201 | _rl_output_some_chars ("*", 1); | |
1202 | ||
726f6388 | 1203 | _rl_output_some_chars (local_prompt, nleft); |
a0c0a00f | 1204 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
0001803f | 1205 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft, 1) - wrap_offset + modmark; |
7117c2d2 | 1206 | else |
3185942a | 1207 | _rl_last_c_pos = nleft + modmark; |
726f6388 JA |
1208 | } |
1209 | ||
1210 | /* Where on that line? And where does that line start | |
1211 | in the buffer? */ | |
ccc6cda3 | 1212 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 | 1213 | /* nleft == number of characters in the line buffer between the |
0628567a JA |
1214 | start of the line and the desired cursor position. */ |
1215 | nleft = cpos_buffer_position - pos; | |
726f6388 | 1216 | |
95732b49 JA |
1217 | /* NLEFT is now a number of characters in a buffer. When in a |
1218 | multibyte locale, however, _rl_last_c_pos is an absolute cursor | |
1219 | position that doesn't take invisible characters in the prompt | |
1220 | into account. We use a fudge factor to compensate. */ | |
1221 | ||
ccc6cda3 | 1222 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 1223 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 1224 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
1225 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
1226 | { | |
0628567a | 1227 | /* TX == new physical cursor position in multibyte locale. */ |
a0c0a00f | 1228 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
0001803f | 1229 | tx = _rl_col_width (&visible_line[pos], 0, nleft, 1) - visible_wrap_offset; |
7117c2d2 | 1230 | else |
95732b49 | 1231 | tx = nleft; |
f1be666c | 1232 | if (tx >= 0 && _rl_last_c_pos > tx) |
95732b49 JA |
1233 | { |
1234 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ | |
1235 | _rl_last_c_pos = tx; | |
1236 | } | |
726f6388 JA |
1237 | } |
1238 | ||
95732b49 JA |
1239 | /* We need to note that in a multibyte locale we are dealing with |
1240 | _rl_last_c_pos as an absolute cursor position, but moving to a | |
1241 | point specified by a buffer position (NLEFT) that doesn't take | |
1242 | invisible characters into account. */ | |
a0c0a00f | 1243 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
1244 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1245 | else if (nleft != _rl_last_c_pos) | |
726f6388 JA |
1246 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
1247 | } | |
1248 | } | |
1249 | else /* Do horizontal scrolling. */ | |
1250 | { | |
1251 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
1252 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
1253 | ||
1254 | /* Always at top line. */ | |
1255 | _rl_last_v_pos = 0; | |
1256 | ||
1257 | /* Compute where in the buffer the displayed line should start. This | |
1258 | will be LMARGIN. */ | |
1259 | ||
1260 | /* The number of characters that will be displayed before the cursor. */ | |
0628567a | 1261 | ndisp = cpos_buffer_position - wrap_offset; |
28ef6c31 | 1262 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 1263 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 1264 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
0628567a | 1265 | phys_c_pos = cpos_buffer_position - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 1266 | t = _rl_screenwidth / 3; |
726f6388 JA |
1267 | |
1268 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 1269 | last_lmargin will be > 0. */ |
726f6388 JA |
1270 | |
1271 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
1272 | width, compute the starting offset so that the cursor is about |
1273 | two-thirds of the way across the screen. */ | |
28ef6c31 | 1274 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 | 1275 | { |
0628567a | 1276 | lmargin = cpos_buffer_position - (2 * t); |
726f6388 JA |
1277 | if (lmargin < 0) |
1278 | lmargin = 0; | |
1279 | /* If the left margin would be in the middle of a prompt with | |
1280 | invisible characters, don't display the prompt at all. */ | |
1281 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
1282 | lmargin = nleft; | |
1283 | } | |
28ef6c31 | 1284 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 1285 | lmargin = 0; |
726f6388 JA |
1286 | else if (phys_c_pos < 1) |
1287 | { | |
1288 | /* If we are moving back towards the beginning of the line and | |
1289 | the last margin is no longer correct, compute a new one. */ | |
0628567a | 1290 | lmargin = ((cpos_buffer_position - 1) / t) * t; /* XXX */ |
726f6388 JA |
1291 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
1292 | lmargin = nleft; | |
1293 | } | |
1294 | else | |
b72432fd | 1295 | lmargin = last_lmargin; |
726f6388 | 1296 | |
ac50fbac CR |
1297 | displaying_prompt_first_line = lmargin < nleft; |
1298 | ||
726f6388 JA |
1299 | /* If the first character on the screen isn't the first character |
1300 | in the display line, indicate this with a special character. */ | |
1301 | if (lmargin > 0) | |
1302 | line[lmargin] = '<'; | |
1303 | ||
1304 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
1305 | the whole line, indicate that with a special character at the |
1306 | right edge of the screen. If LMARGIN is 0, we need to take the | |
1307 | wrap offset into account. */ | |
28ef6c31 | 1308 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 1309 | if (t < out) |
b72432fd | 1310 | line[t - 1] = '>'; |
726f6388 | 1311 | |
89a92869 | 1312 | if (rl_display_fixed == 0 || forced_display || lmargin != last_lmargin) |
726f6388 JA |
1313 | { |
1314 | forced_display = 0; | |
89a92869 CR |
1315 | o_cpos = _rl_last_c_pos; |
1316 | cpos_adjusted = 0; | |
726f6388 JA |
1317 | update_line (&visible_line[last_lmargin], |
1318 | &invisible_line[lmargin], | |
1319 | 0, | |
28ef6c31 JA |
1320 | _rl_screenwidth + visible_wrap_offset, |
1321 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
1322 | 0); |
1323 | ||
a0c0a00f | 1324 | if ((mb_cur_max > 1 && rl_byte_oriented == 0) && |
ac50fbac | 1325 | displaying_prompt_first_line && OLD_CPOS_IN_PROMPT()) |
0001803f | 1326 | _rl_last_c_pos -= prompt_invis_chars_first_line; /* XXX - was wrap_offset */ |
89a92869 | 1327 | |
726f6388 JA |
1328 | /* If the visible new line is shorter than the old, but the number |
1329 | of invisible characters is greater, and we are at the end of | |
1330 | the new line, we need to clear to eol. */ | |
1331 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
1332 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
ac50fbac | 1333 | (_rl_last_c_pos == out) && displaying_prompt_first_line && |
726f6388 JA |
1334 | t < visible_first_line_len) |
1335 | { | |
28ef6c31 | 1336 | nleft = _rl_screenwidth - t; |
d166f048 | 1337 | _rl_clear_to_eol (nleft); |
726f6388 JA |
1338 | } |
1339 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
1340 | if (visible_first_line_len > _rl_screenwidth) |
1341 | visible_first_line_len = _rl_screenwidth; | |
726f6388 | 1342 | |
0628567a | 1343 | _rl_move_cursor_relative (cpos_buffer_position - lmargin, &invisible_line[lmargin]); |
726f6388 JA |
1344 | last_lmargin = lmargin; |
1345 | } | |
1346 | } | |
1347 | fflush (rl_outstream); | |
1348 | ||
1349 | /* Swap visible and non-visible lines. */ | |
1350 | { | |
3185942a | 1351 | struct line_state *vtemp = line_state_visible; |
bb70624e | 1352 | |
3185942a JA |
1353 | line_state_visible = line_state_invisible; |
1354 | line_state_invisible = vtemp; | |
bb70624e | 1355 | |
726f6388 JA |
1356 | rl_display_fixed = 0; |
1357 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1358 | are not displaying any invisible characters, so set visible_wrap_offset | |
1359 | to 0. */ | |
1360 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1361 | visible_wrap_offset = 0; | |
1362 | else | |
1363 | visible_wrap_offset = wrap_offset; | |
1364 | } | |
3185942a | 1365 | |
89a92869 | 1366 | RL_UNSETSTATE (RL_STATE_REDISPLAYING); |
3185942a | 1367 | _rl_release_sigint (); |
726f6388 JA |
1368 | } |
1369 | ||
1370 | /* PWP: update_line() is based on finding the middle difference of each | |
1371 | line on the screen; vis: | |
1372 | ||
1373 | /old first difference | |
1374 | /beginning of line | /old last same /old EOL | |
1375 | v v v v | |
1376 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1377 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1378 | ^ ^ ^ ^ | |
1379 | \beginning of line | \new last same \new end of line | |
1380 | \new first difference | |
1381 | ||
1382 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 1383 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
1384 | |
1385 | Could be made even smarter, but this works well enough */ | |
1386 | static void | |
1387 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1388 | register char *old, *new; | |
ccc6cda3 | 1389 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
1390 | { |
1391 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
f1be666c | 1392 | int temp, lendiff, wsatend, od, nd, twidth, o_cpos; |
ccc6cda3 | 1393 | int current_invis_chars; |
7117c2d2 | 1394 | int col_lendiff, col_temp; |
ac50fbac | 1395 | int bytes_to_insert; |
a0c0a00f | 1396 | int mb_cur_max = MB_CUR_MAX; |
7117c2d2 JA |
1397 | #if defined (HANDLE_MULTIBYTE) |
1398 | mbstate_t ps_new, ps_old; | |
0628567a | 1399 | int new_offset, old_offset; |
7117c2d2 | 1400 | #endif |
726f6388 JA |
1401 | |
1402 | /* If we're at the right edge of a terminal that supports xn, we're | |
1403 | ready to wrap around, so do so. This fixes problems with knowing | |
1404 | the exact cursor position and cut-and-paste with certain terminal | |
1405 | emulators. In this calculation, TEMP is the physical screen | |
1406 | position of the cursor. */ | |
a0c0a00f | 1407 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
95732b49 JA |
1408 | temp = _rl_last_c_pos; |
1409 | else | |
f1be666c | 1410 | temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset); |
28ef6c31 | 1411 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
7117c2d2 | 1412 | && _rl_last_v_pos == current_line - 1) |
726f6388 | 1413 | { |
7117c2d2 | 1414 | #if defined (HANDLE_MULTIBYTE) |
a0c0a00f | 1415 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
1416 | { |
1417 | wchar_t wc; | |
1418 | mbstate_t ps; | |
1419 | int tempwidth, bytes; | |
1420 | size_t ret; | |
1421 | ||
1422 | /* This fixes only double-column characters, but if the wrapped | |
ac50fbac | 1423 | character consumes more than three columns, spaces will be |
7117c2d2 | 1424 | inserted in the string buffer. */ |
3185942a JA |
1425 | if (current_line < line_state_visible->wbsize && line_state_visible->wrapped_line[current_line] > 0) |
1426 | _rl_clear_to_eol (line_state_visible->wrapped_line[current_line]); | |
7117c2d2 JA |
1427 | |
1428 | memset (&ps, 0, sizeof (mbstate_t)); | |
a0c0a00f | 1429 | ret = mbrtowc (&wc, new, mb_cur_max, &ps); |
b80f6443 | 1430 | if (MB_INVALIDCH (ret)) |
7117c2d2 JA |
1431 | { |
1432 | tempwidth = 1; | |
1433 | ret = 1; | |
1434 | } | |
b80f6443 | 1435 | else if (MB_NULLWCH (ret)) |
7117c2d2 JA |
1436 | tempwidth = 0; |
1437 | else | |
ac50fbac | 1438 | tempwidth = WCWIDTH (wc); |
7117c2d2 JA |
1439 | |
1440 | if (tempwidth > 0) | |
1441 | { | |
0001803f | 1442 | int count, i; |
7117c2d2 JA |
1443 | bytes = ret; |
1444 | for (count = 0; count < bytes; count++) | |
1445 | putc (new[count], rl_outstream); | |
1446 | _rl_last_c_pos = tempwidth; | |
1447 | _rl_last_v_pos++; | |
1448 | memset (&ps, 0, sizeof (mbstate_t)); | |
a0c0a00f | 1449 | ret = mbrtowc (&wc, old, mb_cur_max, &ps); |
7117c2d2 JA |
1450 | if (ret != 0 && bytes != 0) |
1451 | { | |
b80f6443 | 1452 | if (MB_INVALIDCH (ret)) |
0001803f CR |
1453 | ret = 1; |
1454 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
7117c2d2 | 1455 | memcpy (old, new, bytes); |
0001803f CR |
1456 | /* Fix up indices if we copy data from one line to another */ |
1457 | omax += bytes - ret; | |
ac50fbac | 1458 | for (i = current_line+1; i <= inv_botlin+1; i++) |
0001803f | 1459 | vis_lbreaks[i] += bytes - ret; |
7117c2d2 JA |
1460 | } |
1461 | } | |
1462 | else | |
1463 | { | |
1464 | putc (' ', rl_outstream); | |
1465 | _rl_last_c_pos = 1; | |
1466 | _rl_last_v_pos++; | |
1467 | if (old[0] && new[0]) | |
1468 | old[0] = new[0]; | |
1469 | } | |
1470 | } | |
726f6388 | 1471 | else |
7117c2d2 JA |
1472 | #endif |
1473 | { | |
1474 | if (new[0]) | |
1475 | putc (new[0], rl_outstream); | |
1476 | else | |
1477 | putc (' ', rl_outstream); | |
95732b49 | 1478 | _rl_last_c_pos = 1; |
7117c2d2 JA |
1479 | _rl_last_v_pos++; |
1480 | if (old[0] && new[0]) | |
1481 | old[0] = new[0]; | |
1482 | } | |
726f6388 | 1483 | } |
7117c2d2 | 1484 | |
726f6388 JA |
1485 | |
1486 | /* Find first difference. */ | |
7117c2d2 | 1487 | #if defined (HANDLE_MULTIBYTE) |
a0c0a00f | 1488 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 | 1489 | { |
b80f6443 JA |
1490 | /* See if the old line is a subset of the new line, so that the |
1491 | only change is adding characters. */ | |
1492 | temp = (omax < nmax) ? omax : nmax; | |
3185942a | 1493 | if (memcmp (old, new, temp) == 0) /* adding at the end */ |
7117c2d2 | 1494 | { |
ac50fbac | 1495 | new_offset = old_offset = temp; |
b80f6443 JA |
1496 | ofd = old + temp; |
1497 | nfd = new + temp; | |
1498 | } | |
1499 | else | |
1500 | { | |
1501 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1502 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1503 | ||
1504 | if (omax == nmax && STREQN (new, old, omax)) | |
1505 | { | |
ac50fbac CR |
1506 | old_offset = omax; |
1507 | new_offset = nmax; | |
b80f6443 JA |
1508 | ofd = old + omax; |
1509 | nfd = new + nmax; | |
1510 | } | |
1511 | else | |
1512 | { | |
1513 | new_offset = old_offset = 0; | |
1514 | for (ofd = old, nfd = new; | |
1515 | (ofd - old < omax) && *ofd && | |
1516 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1517 | { | |
1518 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1519 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
ac50fbac | 1520 | |
b80f6443 JA |
1521 | ofd = old + old_offset; |
1522 | nfd = new + new_offset; | |
1523 | } | |
1524 | } | |
7117c2d2 JA |
1525 | } |
1526 | } | |
1527 | else | |
1528 | #endif | |
726f6388 JA |
1529 | for (ofd = old, nfd = new; |
1530 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1531 | ofd++, nfd++) | |
1532 | ; | |
1533 | ||
1534 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1535 | of the distance between ne and new and oe and old, respectively, to | |
1536 | move a subtraction out of each loop. */ | |
1537 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1538 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1539 | ||
1540 | /* If no difference, continue to next line. */ | |
1541 | if (ofd == oe && nfd == ne) | |
1542 | return; | |
1543 | ||
ac50fbac | 1544 | #if defined (HANDLE_MULTIBYTE) |
a0c0a00f | 1545 | if (mb_cur_max > 1 && rl_byte_oriented == 0 && _rl_utf8locale) |
ac50fbac CR |
1546 | { |
1547 | wchar_t wc; | |
1548 | mbstate_t ps = { 0 }; | |
1549 | int t; | |
1550 | ||
1551 | /* If the first character in the difference is a zero-width character, | |
1552 | assume it's a combining character and back one up so the two base | |
1553 | characters no longer compare equivalently. */ | |
a0c0a00f | 1554 | t = mbrtowc (&wc, ofd, mb_cur_max, &ps); |
ac50fbac CR |
1555 | if (t > 0 && UNICODE_COMBINING_CHAR (wc) && WCWIDTH (wc) == 0) |
1556 | { | |
1557 | old_offset = _rl_find_prev_mbchar (old, ofd - old, MB_FIND_ANY); | |
1558 | new_offset = _rl_find_prev_mbchar (new, nfd - new, MB_FIND_ANY); | |
1559 | ofd = old + old_offset; /* equal by definition */ | |
1560 | nfd = new + new_offset; | |
1561 | } | |
1562 | } | |
1563 | #endif | |
1564 | ||
726f6388 | 1565 | wsatend = 1; /* flag for trailing whitespace */ |
7117c2d2 JA |
1566 | |
1567 | #if defined (HANDLE_MULTIBYTE) | |
a0c0a00f | 1568 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
1569 | { |
1570 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1571 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
ac50fbac | 1572 | |
7117c2d2 JA |
1573 | while ((ols > ofd) && (nls > nfd)) |
1574 | { | |
1575 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1576 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1577 | ||
b80f6443 JA |
1578 | #if 0 |
1579 | /* On advice from jir@yamato.ibm.com */ | |
7117c2d2 JA |
1580 | _rl_adjust_point (old, ols - old, &ps_old); |
1581 | _rl_adjust_point (new, nls - new, &ps_new); | |
b80f6443 | 1582 | #endif |
7117c2d2 JA |
1583 | |
1584 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1585 | break; | |
1586 | ||
1587 | if (*ols == ' ') | |
1588 | wsatend = 0; | |
1589 | ||
1590 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1591 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1592 | } | |
1593 | } | |
1594 | else | |
1595 | { | |
1596 | #endif /* HANDLE_MULTIBYTE */ | |
726f6388 JA |
1597 | ols = oe - 1; /* find last same */ |
1598 | nls = ne - 1; | |
1599 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1600 | { | |
1601 | if (*ols != ' ') | |
1602 | wsatend = 0; | |
1603 | ols--; | |
1604 | nls--; | |
1605 | } | |
7117c2d2 JA |
1606 | #if defined (HANDLE_MULTIBYTE) |
1607 | } | |
1608 | #endif | |
726f6388 JA |
1609 | |
1610 | if (wsatend) | |
1611 | { | |
1612 | ols = oe; | |
1613 | nls = ne; | |
1614 | } | |
7117c2d2 JA |
1615 | #if defined (HANDLE_MULTIBYTE) |
1616 | /* This may not work for stateful encoding, but who cares? To handle | |
1617 | stateful encoding properly, we have to scan each string from the | |
1618 | beginning and compare. */ | |
1619 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1620 | #else | |
726f6388 | 1621 | else if (*ols != *nls) |
7117c2d2 | 1622 | #endif |
726f6388 JA |
1623 | { |
1624 | if (*ols) /* don't step past the NUL */ | |
7117c2d2 | 1625 | { |
a0c0a00f | 1626 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
1627 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); |
1628 | else | |
1629 | ols++; | |
1630 | } | |
726f6388 | 1631 | if (*nls) |
7117c2d2 | 1632 | { |
a0c0a00f | 1633 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
1634 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); |
1635 | else | |
1636 | nls++; | |
1637 | } | |
726f6388 JA |
1638 | } |
1639 | ||
ccc6cda3 JA |
1640 | /* count of invisible characters in the current invisible line. */ |
1641 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1642 | if (_rl_last_v_pos != current_line) | |
1643 | { | |
1644 | _rl_move_vert (current_line); | |
a0c0a00f CR |
1645 | /* We have moved up to a new screen line. This line may or may not have |
1646 | invisible characters on it, but we do our best to recalculate | |
1647 | visible_wrap_offset based on what we know. */ | |
1648 | if (current_line == 0) | |
1649 | visible_wrap_offset = prompt_invis_chars_first_line; /* XXX */ | |
1650 | if ((mb_cur_max == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) | |
ccc6cda3 JA |
1651 | _rl_last_c_pos += visible_wrap_offset; |
1652 | } | |
726f6388 JA |
1653 | |
1654 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
1655 | prompt string, and the prompt string has not changed, and the current |
1656 | cursor position is before the last invisible character in the prompt, | |
1657 | and the index of the character to move to is past the end of the prompt | |
1658 | string, then redraw the entire prompt string. We can only do this | |
1659 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 1660 | |
a0c0a00f CR |
1661 | This can also happen if the prompt string has changed, and the first |
1662 | difference in the line is in the middle of the prompt string, after a | |
1663 | sequence of invisible characters (worst case) and before the end of | |
1664 | the prompt. In this case, we have to redraw the entire prompt string | |
1665 | so that the entire sequence of invisible characters is drawn. We need | |
1666 | to handle the worst case, when the difference is after (or in the middle | |
1667 | of) a sequence of invisible characters that changes the text color and | |
1668 | before the sequence that restores the text color to normal. Then we have | |
1669 | to make sure that the lines still differ -- if they don't, we can | |
1670 | return immediately. | |
1671 | ||
ccc6cda3 JA |
1672 | This is not an efficiency hack -- there is a problem with redrawing |
1673 | portions of the prompt string if they contain terminal escape | |
1674 | sequences (like drawing the `unbold' sequence without a corresponding | |
1675 | `bold') that manifests itself on certain terminals. */ | |
726f6388 | 1676 | |
0628567a | 1677 | lendiff = local_prompt_len; |
a0c0a00f CR |
1678 | if (lendiff > nmax) |
1679 | lendiff = nmax; | |
ccc6cda3 | 1680 | od = ofd - old; /* index of first difference in visible line */ |
a0c0a00f | 1681 | nd = nfd - new; /* nd, od are buffer indexes */ |
726f6388 | 1682 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 | 1683 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
a0c0a00f CR |
1684 | (((od > 0 || nd > 0) && (od <= prompt_last_invisible || nd <= prompt_last_invisible)) || |
1685 | ((od >= lendiff) && _rl_last_c_pos < PROMPT_ENDING_INDEX))) | |
726f6388 | 1686 | { |
bb70624e JA |
1687 | #if defined (__MSDOS__) |
1688 | putc ('\r', rl_outstream); | |
1689 | #else | |
28ef6c31 | 1690 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1691 | #endif |
3185942a JA |
1692 | if (modmark) |
1693 | _rl_output_some_chars ("*", 1); | |
726f6388 | 1694 | _rl_output_some_chars (local_prompt, lendiff); |
a0c0a00f | 1695 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
95732b49 JA |
1696 | { |
1697 | /* We take wrap_offset into account here so we can pass correct | |
1698 | information to _rl_move_cursor_relative. */ | |
0001803f | 1699 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff, 1) - wrap_offset + modmark; |
95732b49 JA |
1700 | cpos_adjusted = 1; |
1701 | } | |
7117c2d2 | 1702 | else |
3185942a | 1703 | _rl_last_c_pos = lendiff + modmark; |
a0c0a00f CR |
1704 | |
1705 | /* Now if we have printed the prompt string because the first difference | |
1706 | was within the prompt, see if we need to recompute where the lines | |
1707 | differ. Check whether where we are now is past the last place where | |
1708 | the old and new lines are the same and short-circuit now if we are. */ | |
1709 | if ((od <= prompt_last_invisible || nd <= prompt_last_invisible) && | |
1710 | omax == nmax && | |
1711 | lendiff > (ols-old) && lendiff > (nls-new)) | |
1712 | return; | |
1713 | ||
1714 | /* XXX - we need to fix up our calculations if we are now past the | |
1715 | old ofd/nfd and the prompt length (or line length) has changed. | |
1716 | We punt on the problem and do a dumb update. We'd like to be able | |
1717 | to just output the prompt from the beginning of the line up to the | |
1718 | first difference, but you don't know the number of invisible | |
1719 | characters in that case. | |
1720 | This needs a lot of work to be efficient. */ | |
1721 | if ((od <= prompt_last_invisible || nd <= prompt_last_invisible)) | |
1722 | { | |
1723 | nfd = new + lendiff; /* number of characters we output above */ | |
1724 | nd = lendiff; | |
1725 | ||
1726 | /* Do a dumb update and return */ | |
1727 | temp = ne - nfd; | |
1728 | if (temp > 0) | |
1729 | { | |
1730 | _rl_output_some_chars (nfd, temp); | |
1731 | if (mb_cur_max > 1 && rl_byte_oriented == 0) | |
1732 | _rl_last_c_pos += _rl_col_width (new, nd, ne - new, 1); | |
1733 | else | |
1734 | _rl_last_c_pos += temp; | |
1735 | } | |
1736 | if (nmax < omax) | |
1737 | goto clear_rest_of_line; /* XXX */ | |
1738 | else | |
1739 | return; | |
1740 | } | |
726f6388 JA |
1741 | } |
1742 | ||
f1be666c JA |
1743 | o_cpos = _rl_last_c_pos; |
1744 | ||
0628567a | 1745 | /* When this function returns, _rl_last_c_pos is correct, and an absolute |
ac50fbac | 1746 | cursor position in multibyte mode, but a buffer index when not in a |
0628567a | 1747 | multibyte locale. */ |
ccc6cda3 | 1748 | _rl_move_cursor_relative (od, old); |
ac50fbac | 1749 | |
0628567a JA |
1750 | #if defined (HANDLE_MULTIBYTE) |
1751 | /* We need to indicate that the cursor position is correct in the presence of | |
1752 | invisible characters in the prompt string. Let's see if setting this when | |
1753 | we make sure we're at the end of the drawn prompt string works. */ | |
a0c0a00f | 1754 | if (current_line == 0 && mb_cur_max > 1 && rl_byte_oriented == 0 && |
f1be666c JA |
1755 | (_rl_last_c_pos > 0 || o_cpos > 0) && |
1756 | _rl_last_c_pos == prompt_physical_chars) | |
0628567a | 1757 | cpos_adjusted = 1; |
0628567a | 1758 | #endif |
726f6388 | 1759 | |
7117c2d2 | 1760 | /* if (len (new) > len (old)) |
ac50fbac CR |
1761 | lendiff == difference in buffer (bytes) |
1762 | col_lendiff == difference on screen (columns) | |
7117c2d2 | 1763 | When not using multibyte characters, these are equal */ |
726f6388 | 1764 | lendiff = (nls - nfd) - (ols - ofd); |
a0c0a00f | 1765 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
0001803f | 1766 | col_lendiff = _rl_col_width (new, nfd - new, nls - new, 1) - _rl_col_width (old, ofd - old, ols - old, 1); |
7117c2d2 JA |
1767 | else |
1768 | col_lendiff = lendiff; | |
726f6388 | 1769 | |
ccc6cda3 JA |
1770 | /* If we are changing the number of invisible characters in a line, and |
1771 | the spot of first difference is before the end of the invisible chars, | |
1772 | lendiff needs to be adjusted. */ | |
eec5e6ee | 1773 | if (current_line == 0 && /* !_rl_horizontal_scroll_mode && */ |
ccc6cda3 | 1774 | current_invis_chars != visible_wrap_offset) |
7117c2d2 | 1775 | { |
a0c0a00f | 1776 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 JA |
1777 | { |
1778 | lendiff += visible_wrap_offset - current_invis_chars; | |
1779 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1780 | } | |
1781 | else | |
1782 | { | |
1783 | lendiff += visible_wrap_offset - current_invis_chars; | |
1784 | col_lendiff = lendiff; | |
1785 | } | |
1786 | } | |
ccc6cda3 | 1787 | |
ac50fbac CR |
1788 | /* We use temp as a count of the number of bytes from the first difference |
1789 | to the end of the new line. col_temp is the corresponding number of | |
1790 | screen columns. A `dumb' update moves to the spot of first difference | |
1791 | and writes TEMP bytes. */ | |
726f6388 JA |
1792 | /* Insert (diff (len (old), len (new)) ch. */ |
1793 | temp = ne - nfd; | |
a0c0a00f | 1794 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
0001803f | 1795 | col_temp = _rl_col_width (new, nfd - new, ne - new, 1); |
7117c2d2 JA |
1796 | else |
1797 | col_temp = temp; | |
1798 | ||
ac50fbac CR |
1799 | /* how many bytes from the new line buffer to write to the display */ |
1800 | bytes_to_insert = nls - nfd; | |
1801 | ||
1802 | /* col_lendiff > 0 if we are adding characters to the line */ | |
7117c2d2 | 1803 | if (col_lendiff > 0) /* XXX - was lendiff */ |
726f6388 JA |
1804 | { |
1805 | /* Non-zero if we're increasing the number of lines. */ | |
1806 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
f1be666c JA |
1807 | /* If col_lendiff is > 0, implying that the new string takes up more |
1808 | screen real estate than the old, but lendiff is < 0, meaning that it | |
1809 | takes fewer bytes, we need to just output the characters starting | |
1810 | from the first difference. These will overwrite what is on the | |
1811 | display, so there's no reason to do a smart update. This can really | |
1812 | only happen in a multibyte environment. */ | |
1813 | if (lendiff < 0) | |
1814 | { | |
1815 | _rl_output_some_chars (nfd, temp); | |
ac50fbac | 1816 | _rl_last_c_pos += col_temp; /* XXX - was _rl_col_width (nfd, 0, temp, 1); */ |
f1be666c JA |
1817 | /* If nfd begins before any invisible characters in the prompt, |
1818 | adjust _rl_last_c_pos to account for wrap_offset and set | |
1819 | cpos_adjusted to let the caller know. */ | |
ac50fbac | 1820 | if (current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
f1be666c JA |
1821 | { |
1822 | _rl_last_c_pos -= wrap_offset; | |
1823 | cpos_adjusted = 1; | |
1824 | } | |
1825 | return; | |
1826 | } | |
726f6388 JA |
1827 | /* Sometimes it is cheaper to print the characters rather than |
1828 | use the terminal's capabilities. If we're growing the number | |
1829 | of lines, make sure we actually cause the new line to wrap | |
1830 | around on auto-wrapping terminals. */ | |
f1be666c | 1831 | else if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1832 | { |
28ef6c31 | 1833 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1834 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1835 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 | 1836 | invisible characters. We need to just draw them. */ |
3185942a JA |
1837 | /* The same thing happens if we're trying to draw before the last |
1838 | invisible character in the prompt string or we're increasing the | |
1839 | number of invisible characters in the line and we're not drawing | |
1840 | the entire prompt string. */ | |
1841 | if (*ols && ((_rl_horizontal_scroll_mode && | |
1842 | _rl_last_c_pos == 0 && | |
1843 | lendiff > prompt_visible_length && | |
1844 | current_invis_chars > 0) == 0) && | |
a0c0a00f | 1845 | (((mb_cur_max > 1 && rl_byte_oriented == 0) && |
3185942a JA |
1846 | current_line == 0 && wrap_offset && |
1847 | ((nfd - new) <= prompt_last_invisible) && | |
1848 | (col_lendiff < prompt_visible_length)) == 0) && | |
1849 | (visible_wrap_offset >= current_invis_chars)) | |
726f6388 | 1850 | { |
ac50fbac CR |
1851 | open_some_spaces (col_lendiff); |
1852 | _rl_output_some_chars (nfd, bytes_to_insert); | |
a0c0a00f | 1853 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
ac50fbac CR |
1854 | _rl_last_c_pos += _rl_col_width (nfd, 0, bytes_to_insert, 1); |
1855 | else | |
1856 | _rl_last_c_pos += bytes_to_insert; | |
3185942a | 1857 | } |
a0c0a00f | 1858 | else if ((mb_cur_max == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
726f6388 JA |
1859 | { |
1860 | /* At the end of a line the characters do not have to | |
1861 | be "inserted". They can just be placed on the screen. */ | |
ac50fbac CR |
1862 | _rl_output_some_chars (nfd, temp); |
1863 | _rl_last_c_pos += col_temp; | |
1864 | return; | |
726f6388 | 1865 | } |
ac50fbac | 1866 | else /* just write from first difference to end of new line */ |
ccc6cda3 | 1867 | { |
ccc6cda3 | 1868 | _rl_output_some_chars (nfd, temp); |
7117c2d2 | 1869 | _rl_last_c_pos += col_temp; |
3185942a JA |
1870 | /* If nfd begins before the last invisible character in the |
1871 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1872 | and set cpos_adjusted to let the caller know. */ | |
a0c0a00f | 1873 | if ((mb_cur_max > 1 && rl_byte_oriented == 0) && current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
f1be666c JA |
1874 | { |
1875 | _rl_last_c_pos -= wrap_offset; | |
1876 | cpos_adjusted = 1; | |
1877 | } | |
ccc6cda3 JA |
1878 | return; |
1879 | } | |
ac50fbac CR |
1880 | |
1881 | if (bytes_to_insert > lendiff) | |
726f6388 | 1882 | { |
3185942a JA |
1883 | /* If nfd begins before the last invisible character in the |
1884 | prompt, adjust _rl_last_c_pos to account for wrap_offset | |
1885 | and set cpos_adjusted to let the caller know. */ | |
a0c0a00f | 1886 | if ((mb_cur_max > 1 && rl_byte_oriented == 0) && current_line == 0 && displaying_prompt_first_line && wrap_offset && ((nfd - new) <= prompt_last_invisible)) |
3185942a JA |
1887 | { |
1888 | _rl_last_c_pos -= wrap_offset; | |
1889 | cpos_adjusted = 1; | |
1890 | } | |
726f6388 JA |
1891 | } |
1892 | } | |
1893 | else | |
1894 | { | |
1895 | /* cannot insert chars, write to EOL */ | |
1896 | _rl_output_some_chars (nfd, temp); | |
7117c2d2 | 1897 | _rl_last_c_pos += col_temp; |
95732b49 JA |
1898 | /* If we're in a multibyte locale and were before the last invisible |
1899 | char in the current line (which implies we just output some invisible | |
1900 | characters) we need to adjust _rl_last_c_pos, since it represents | |
1901 | a physical character position. */ | |
a0c0a00f CR |
1902 | /* The current_line*rl_screenwidth+prompt_invis_chars_first_line is a |
1903 | crude attempt to compute how far into the new line buffer we are. | |
1904 | It doesn't work well in the face of multibyte characters and needs | |
1905 | to be rethought. XXX */ | |
1906 | if ((mb_cur_max > 1 && rl_byte_oriented == 0) && | |
3185942a | 1907 | current_line == prompt_last_screen_line && wrap_offset && |
ac50fbac | 1908 | displaying_prompt_first_line && |
3185942a | 1909 | wrap_offset != prompt_invis_chars_first_line && |
a0c0a00f | 1910 | ((nfd-new) < (prompt_last_invisible-(current_line*_rl_screenwidth+prompt_invis_chars_first_line)))) |
3185942a JA |
1911 | { |
1912 | _rl_last_c_pos -= wrap_offset - prompt_invis_chars_first_line; | |
1913 | cpos_adjusted = 1; | |
1914 | } | |
726f6388 JA |
1915 | } |
1916 | } | |
1917 | else /* Delete characters from line. */ | |
1918 | { | |
1919 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
7117c2d2 | 1920 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
726f6388 JA |
1921 | { |
1922 | /* If all we're doing is erasing the invisible characters in the | |
1923 | prompt string, don't bother. It screws up the assumptions | |
1924 | about what's on the screen. */ | |
1925 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
ac50fbac | 1926 | displaying_prompt_first_line && |
726f6388 | 1927 | -lendiff == visible_wrap_offset) |
7117c2d2 | 1928 | col_lendiff = 0; |
726f6388 | 1929 | |
ac50fbac CR |
1930 | /* If we have moved lmargin and we're shrinking the line, we've |
1931 | already moved the cursor to the first character of the new line, | |
1932 | so deleting -col_lendiff characters will mess up the cursor | |
1933 | position calculation */ | |
1934 | if (_rl_horizontal_scroll_mode && displaying_prompt_first_line == 0 && | |
1935 | col_lendiff && _rl_last_c_pos < -col_lendiff) | |
1936 | col_lendiff = 0; | |
1937 | ||
7117c2d2 JA |
1938 | if (col_lendiff) |
1939 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
726f6388 | 1940 | |
ac50fbac CR |
1941 | /* Copy (new) chars to screen from first diff to last match, |
1942 | overwriting what is there. */ | |
1943 | if (bytes_to_insert > 0) | |
726f6388 | 1944 | { |
f1be666c JA |
1945 | /* If nfd begins at the prompt, or before the invisible |
1946 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1947 | in a multibyte locale to account for the wrap offset and | |
1948 | set cpos_adjusted accordingly. */ | |
ac50fbac | 1949 | _rl_output_some_chars (nfd, bytes_to_insert); |
a0c0a00f | 1950 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
f1be666c | 1951 | { |
ac50fbac CR |
1952 | _rl_last_c_pos += _rl_col_width (nfd, 0, bytes_to_insert, 1); |
1953 | if (current_line == 0 && wrap_offset && | |
1954 | displaying_prompt_first_line && | |
1955 | _rl_last_c_pos > wrap_offset && | |
1956 | ((nfd - new) <= prompt_last_invisible)) | |
f1be666c JA |
1957 | { |
1958 | _rl_last_c_pos -= wrap_offset; | |
1959 | cpos_adjusted = 1; | |
1960 | } | |
1961 | } | |
3185942a | 1962 | else |
ac50fbac CR |
1963 | _rl_last_c_pos += bytes_to_insert; |
1964 | ||
eec5e6ee CR |
1965 | /* XXX - we only want to do this if we are at the end of the line |
1966 | so we move there with _rl_move_cursor_relative */ | |
ac50fbac | 1967 | if (_rl_horizontal_scroll_mode && ((oe-old) > (ne-new))) |
eec5e6ee CR |
1968 | { |
1969 | _rl_move_cursor_relative (ne-new, new); | |
1970 | goto clear_rest_of_line; | |
1971 | } | |
726f6388 JA |
1972 | } |
1973 | } | |
1974 | /* Otherwise, print over the existing material. */ | |
1975 | else | |
1976 | { | |
1977 | if (temp > 0) | |
1978 | { | |
f1be666c JA |
1979 | /* If nfd begins at the prompt, or before the invisible |
1980 | characters in the prompt, we need to adjust _rl_last_c_pos | |
1981 | in a multibyte locale to account for the wrap offset and | |
1982 | set cpos_adjusted accordingly. */ | |
726f6388 | 1983 | _rl_output_some_chars (nfd, temp); |
95732b49 | 1984 | _rl_last_c_pos += col_temp; /* XXX */ |
a0c0a00f | 1985 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
f1be666c | 1986 | { |
ac50fbac CR |
1987 | if (current_line == 0 && wrap_offset && |
1988 | displaying_prompt_first_line && | |
1989 | _rl_last_c_pos > wrap_offset && | |
1990 | ((nfd - new) <= prompt_last_invisible)) | |
f1be666c JA |
1991 | { |
1992 | _rl_last_c_pos -= wrap_offset; | |
1993 | cpos_adjusted = 1; | |
1994 | } | |
1995 | } | |
726f6388 | 1996 | } |
ac50fbac | 1997 | clear_rest_of_line: |
726f6388 | 1998 | lendiff = (oe - old) - (ne - new); |
a0c0a00f | 1999 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
0001803f | 2000 | col_lendiff = _rl_col_width (old, 0, oe - old, 1) - _rl_col_width (new, 0, ne - new, 1); |
7117c2d2 JA |
2001 | else |
2002 | col_lendiff = lendiff; | |
2003 | ||
3185942a JA |
2004 | /* If we've already printed over the entire width of the screen, |
2005 | including the old material, then col_lendiff doesn't matter and | |
2006 | space_to_eol will insert too many spaces. XXX - maybe we should | |
2007 | adjust col_lendiff based on the difference between _rl_last_c_pos | |
2008 | and _rl_screenwidth */ | |
a0c0a00f | 2009 | if (col_lendiff && ((mb_cur_max == 1 || rl_byte_oriented) || (_rl_last_c_pos < _rl_screenwidth))) |
b72432fd JA |
2010 | { |
2011 | if (_rl_term_autowrap && current_line < inv_botlin) | |
7117c2d2 | 2012 | space_to_eol (col_lendiff); |
b72432fd | 2013 | else |
7117c2d2 | 2014 | _rl_clear_to_eol (col_lendiff); |
b72432fd | 2015 | } |
726f6388 JA |
2016 | } |
2017 | } | |
2018 | } | |
2019 | ||
2020 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 2021 | int |
726f6388 JA |
2022 | rl_on_new_line () |
2023 | { | |
2024 | if (visible_line) | |
2025 | visible_line[0] = '\0'; | |
2026 | ||
2027 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
2028 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
2029 | if (vis_lbreaks) |
2030 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
2031 | visible_wrap_offset = 0; | |
726f6388 JA |
2032 | return 0; |
2033 | } | |
2034 | ||
a0c0a00f CR |
2035 | /* Clear all screen lines occupied by the current readline line buffer |
2036 | (visible line) */ | |
2037 | int | |
2038 | rl_clear_visible_line () | |
2039 | { | |
2040 | int curr_line; | |
2041 | ||
2042 | /* Make sure we move to column 0 so we clear the entire line */ | |
2043 | #if defined (__MSDOS__) | |
2044 | putc ('\r', rl_outstream); | |
2045 | #else | |
2046 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2047 | #endif | |
2048 | _rl_last_c_pos = 0; | |
2049 | ||
2050 | /* Move to the last screen line of the current visible line */ | |
2051 | _rl_move_vert (_rl_vis_botlin); | |
2052 | ||
2053 | /* And erase screen lines going up to line 0 (first visible line) */ | |
2054 | for (curr_line = _rl_last_v_pos; curr_line >= 0; curr_line--) | |
2055 | { | |
2056 | _rl_move_vert (curr_line); | |
2057 | _rl_clear_to_eol (0); | |
2058 | } | |
2059 | ||
2060 | return 0; | |
2061 | } | |
2062 | ||
bb70624e JA |
2063 | /* Tell the update routines that we have moved onto a new line with the |
2064 | prompt already displayed. Code originally from the version of readline | |
b80f6443 JA |
2065 | distributed with CLISP. rl_expand_prompt must have already been called |
2066 | (explicitly or implicitly). This still doesn't work exactly right. */ | |
bb70624e JA |
2067 | int |
2068 | rl_on_new_line_with_prompt () | |
2069 | { | |
2070 | int prompt_size, i, l, real_screenwidth, newlines; | |
b80f6443 | 2071 | char *prompt_last_line, *lprompt; |
bb70624e JA |
2072 | |
2073 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
2074 | the already-displayed prompt. */ | |
2075 | prompt_size = strlen (rl_prompt) + 1; | |
2076 | init_line_structures (prompt_size); | |
2077 | ||
2078 | /* Make sure the line structures hold the already-displayed prompt for | |
2079 | redisplay. */ | |
b80f6443 JA |
2080 | lprompt = local_prompt ? local_prompt : rl_prompt; |
2081 | strcpy (visible_line, lprompt); | |
2082 | strcpy (invisible_line, lprompt); | |
bb70624e JA |
2083 | |
2084 | /* If the prompt contains newlines, take the last tail. */ | |
2085 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
2086 | if (!prompt_last_line) | |
2087 | prompt_last_line = rl_prompt; | |
2088 | ||
2089 | l = strlen (prompt_last_line); | |
7117c2d2 | 2090 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
0001803f | 2091 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l, 1); /* XXX */ |
7117c2d2 JA |
2092 | else |
2093 | _rl_last_c_pos = l; | |
bb70624e JA |
2094 | |
2095 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
2096 | to use the real screenwidth. Readline's notion of screenwidth might be | |
2097 | one less, see terminal.c. */ | |
28ef6c31 | 2098 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
2099 | _rl_last_v_pos = l / real_screenwidth; |
2100 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
2101 | whether the cursor is at the end of the last line, or already at the | |
2102 | beginning of the next line. Output a newline just to be safe. */ | |
2103 | if (l > 0 && (l % real_screenwidth) == 0) | |
2104 | _rl_output_some_chars ("\n", 1); | |
2105 | last_lmargin = 0; | |
2106 | ||
2107 | newlines = 0; i = 0; | |
2108 | while (i <= l) | |
2109 | { | |
2110 | _rl_vis_botlin = newlines; | |
2111 | vis_lbreaks[newlines++] = i; | |
2112 | i += real_screenwidth; | |
2113 | } | |
2114 | vis_lbreaks[newlines] = l; | |
2115 | visible_wrap_offset = 0; | |
2116 | ||
b80f6443 JA |
2117 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
2118 | ||
bb70624e JA |
2119 | return 0; |
2120 | } | |
2121 | ||
726f6388 | 2122 | /* Actually update the display, period. */ |
ccc6cda3 | 2123 | int |
726f6388 JA |
2124 | rl_forced_update_display () |
2125 | { | |
0628567a JA |
2126 | register char *temp; |
2127 | ||
726f6388 JA |
2128 | if (visible_line) |
2129 | { | |
0628567a | 2130 | temp = visible_line; |
ccc6cda3 | 2131 | while (*temp) |
b72432fd | 2132 | *temp++ = '\0'; |
726f6388 JA |
2133 | } |
2134 | rl_on_new_line (); | |
2135 | forced_display++; | |
ccc6cda3 | 2136 | (*rl_redisplay_function) (); |
726f6388 JA |
2137 | return 0; |
2138 | } | |
2139 | ||
a0c0a00f CR |
2140 | /* Redraw only the last line of a multi-line prompt. */ |
2141 | void | |
2142 | rl_redraw_prompt_last_line () | |
2143 | { | |
2144 | char *t; | |
2145 | ||
2146 | t = strrchr (rl_display_prompt, '\n'); | |
2147 | if (t) | |
2148 | redraw_prompt (++t); | |
2149 | else | |
2150 | rl_forced_update_display (); | |
2151 | } | |
2152 | ||
726f6388 | 2153 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. |
95732b49 JA |
2154 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
2155 | buffer index.) | |
726f6388 | 2156 | DATA is the contents of the screen line of interest; i.e., where |
a0c0a00f CR |
2157 | the movement is being done. |
2158 | DATA is always the visible line or the invisible line */ | |
726f6388 JA |
2159 | void |
2160 | _rl_move_cursor_relative (new, data) | |
2161 | int new; | |
28ef6c31 | 2162 | const char *data; |
726f6388 JA |
2163 | { |
2164 | register int i; | |
95732b49 JA |
2165 | int woff; /* number of invisible chars on current line */ |
2166 | int cpos, dpos; /* current and desired cursor positions */ | |
0001803f | 2167 | int adjust; |
a0c0a00f CR |
2168 | int in_invisline; |
2169 | int mb_cur_max = MB_CUR_MAX; | |
726f6388 | 2170 | |
f1be666c | 2171 | woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset); |
95732b49 | 2172 | cpos = _rl_last_c_pos; |
89a92869 CR |
2173 | |
2174 | if (cpos == 0 && cpos == new) | |
2175 | return; | |
2176 | ||
7117c2d2 JA |
2177 | #if defined (HANDLE_MULTIBYTE) |
2178 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
2179 | a multibyte string, but _rl_last_c_pos is the display position. In | |
b80f6443 | 2180 | this case, NEW's display position is not obvious and must be |
95732b49 JA |
2181 | calculated. We need to account for invisible characters in this line, |
2182 | as long as we are past them and they are counted by _rl_col_width. */ | |
a0c0a00f | 2183 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
b80f6443 | 2184 | { |
0001803f CR |
2185 | adjust = 1; |
2186 | /* Try to short-circuit common cases and eliminate a bunch of multibyte | |
2187 | character function calls. */ | |
2188 | /* 1. prompt string */ | |
2189 | if (new == local_prompt_len && memcmp (data, local_prompt, new) == 0) | |
2190 | { | |
2191 | dpos = prompt_physical_chars; | |
2192 | cpos_adjusted = 1; | |
2193 | adjust = 0; | |
2194 | } | |
2195 | /* 2. prompt_string + line contents */ | |
2196 | else if (new > local_prompt_len && local_prompt && memcmp (data, local_prompt, local_prompt_len) == 0) | |
2197 | { | |
2198 | dpos = prompt_physical_chars + _rl_col_width (data, local_prompt_len, new, 1); | |
2199 | cpos_adjusted = 1; | |
2200 | adjust = 0; | |
2201 | } | |
2202 | else | |
2203 | dpos = _rl_col_width (data, 0, new, 1); | |
2204 | ||
ac50fbac CR |
2205 | if (displaying_prompt_first_line == 0) |
2206 | adjust = 0; | |
2207 | ||
a0c0a00f CR |
2208 | /* yet another special case: printing the last line of a prompt with |
2209 | multibyte characters and invisible characters whose printable length | |
2210 | exceeds the screen width with the last invisible character | |
2211 | (prompt_last_invisible) in the last line. IN_INVISLINE is the | |
2212 | offset of DATA in invisible_line */ | |
2213 | in_invisline = 0; | |
2214 | if (data > invisible_line && data < invisible_line+inv_lbreaks[_rl_inv_botlin+1]) | |
2215 | in_invisline = data - invisible_line; | |
2216 | ||
f1be666c JA |
2217 | /* Use NEW when comparing against the last invisible character in the |
2218 | prompt string, since they're both buffer indices and DPOS is a | |
2219 | desired display position. */ | |
a0c0a00f CR |
2220 | /* NEW is relative to the current displayed line, while |
2221 | PROMPT_LAST_INVISIBLE is relative to the entire (wrapped) line. | |
2222 | Need a way to reconcile these two variables by turning NEW into a | |
2223 | buffer position relative to the start of the line */ | |
0001803f | 2224 | if (adjust && ((new > prompt_last_invisible) || /* XXX - don't use woff here */ |
a0c0a00f CR |
2225 | (new+in_invisline > prompt_last_invisible) || /* invisible line */ |
2226 | (prompt_physical_chars >= _rl_screenwidth && /* visible line */ | |
f1be666c | 2227 | _rl_last_v_pos == prompt_last_screen_line && |
89a92869 | 2228 | wrap_offset >= woff && dpos >= woff && |
a0c0a00f | 2229 | new > (prompt_last_invisible-(vis_lbreaks[_rl_last_v_pos])-wrap_offset)))) |
3185942a | 2230 | /* XXX last comparison might need to be >= */ |
0628567a JA |
2231 | { |
2232 | dpos -= woff; | |
2233 | /* Since this will be assigned to _rl_last_c_pos at the end (more | |
2234 | precisely, _rl_last_c_pos == dpos when this function returns), | |
2235 | let the caller know. */ | |
2236 | cpos_adjusted = 1; | |
2237 | } | |
b80f6443 | 2238 | } |
95732b49 | 2239 | else |
7117c2d2 | 2240 | #endif |
95732b49 JA |
2241 | dpos = new; |
2242 | ||
2243 | /* If we don't have to do anything, then return. */ | |
2244 | if (cpos == dpos) | |
2245 | return; | |
726f6388 JA |
2246 | |
2247 | /* It may be faster to output a CR, and then move forwards instead | |
2248 | of moving backwards. */ | |
2249 | /* i == current physical cursor position. */ | |
95732b49 | 2250 | #if defined (HANDLE_MULTIBYTE) |
a0c0a00f | 2251 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
95732b49 JA |
2252 | i = _rl_last_c_pos; |
2253 | else | |
2254 | #endif | |
2255 | i = _rl_last_c_pos - woff; | |
0628567a | 2256 | if (dpos == 0 || CR_FASTER (dpos, _rl_last_c_pos) || |
28ef6c31 | 2257 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
2258 | { |
2259 | #if defined (__MSDOS__) | |
2260 | putc ('\r', rl_outstream); | |
2261 | #else | |
28ef6c31 | 2262 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 | 2263 | #endif /* !__MSDOS__ */ |
95732b49 | 2264 | cpos = _rl_last_c_pos = 0; |
726f6388 JA |
2265 | } |
2266 | ||
95732b49 | 2267 | if (cpos < dpos) |
726f6388 JA |
2268 | { |
2269 | /* Move the cursor forward. We do it by printing the command | |
2270 | to move the cursor forward if there is one, else print that | |
2271 | portion of the output buffer again. Which is cheaper? */ | |
2272 | ||
2273 | /* The above comment is left here for posterity. It is faster | |
2274 | to print one character (non-control) than to print a control | |
2275 | sequence telling the terminal to move forward one character. | |
2276 | That kind of control is for people who don't know what the | |
2277 | data is underneath the cursor. */ | |
0628567a JA |
2278 | |
2279 | /* However, we need a handle on where the current display position is | |
2280 | in the buffer for the immediately preceding comment to be true. | |
2281 | In multibyte locales, we don't currently have that info available. | |
2282 | Without it, we don't know where the data we have to display begins | |
2283 | in the buffer and we have to go back to the beginning of the screen | |
2284 | line. In this case, we can use the terminal sequence to move forward | |
2285 | if it's available. */ | |
a0c0a00f | 2286 | if (mb_cur_max > 1 && rl_byte_oriented == 0) |
7117c2d2 | 2287 | { |
0628567a JA |
2288 | if (_rl_term_forward_char) |
2289 | { | |
2290 | for (i = cpos; i < dpos; i++) | |
2291 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
2292 | } | |
2293 | else | |
2294 | { | |
2295 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
2296 | for (i = 0; i < new; i++) | |
2297 | putc (data[i], rl_outstream); | |
2298 | } | |
7117c2d2 | 2299 | } |
726f6388 | 2300 | else |
95732b49 | 2301 | for (i = cpos; i < new; i++) |
726f6388 | 2302 | putc (data[i], rl_outstream); |
726f6388 | 2303 | } |
95732b49 | 2304 | |
7117c2d2 JA |
2305 | #if defined (HANDLE_MULTIBYTE) |
2306 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
2307 | The byte length of the string is probably bigger than the column width | |
2308 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
2309 | display point is less than _rl_last_c_pos. */ | |
7117c2d2 | 2310 | #endif |
95732b49 JA |
2311 | else if (cpos > dpos) |
2312 | _rl_backspace (cpos - dpos); | |
7117c2d2 | 2313 | |
95732b49 | 2314 | _rl_last_c_pos = dpos; |
726f6388 JA |
2315 | } |
2316 | ||
2317 | /* PWP: move the cursor up or down. */ | |
2318 | void | |
2319 | _rl_move_vert (to) | |
2320 | int to; | |
2321 | { | |
2322 | register int delta, i; | |
2323 | ||
28ef6c31 | 2324 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
2325 | return; |
2326 | ||
726f6388 JA |
2327 | if ((delta = to - _rl_last_v_pos) > 0) |
2328 | { | |
2329 | for (i = 0; i < delta; i++) | |
2330 | putc ('\n', rl_outstream); | |
bb70624e JA |
2331 | #if defined (__MSDOS__) |
2332 | putc ('\r', rl_outstream); | |
2333 | #else | |
28ef6c31 | 2334 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2335 | #endif |
726f6388 JA |
2336 | _rl_last_c_pos = 0; |
2337 | } | |
2338 | else | |
2339 | { /* delta < 0 */ | |
ac50fbac CR |
2340 | #ifdef __DJGPP__ |
2341 | int row, col; | |
2342 | ||
2343 | fflush (rl_outstream); | |
2344 | ScreenGetCursor (&row, &col); | |
2345 | ScreenSetCursor (row + delta, col); | |
2346 | i = -delta; | |
2347 | #else | |
28ef6c31 | 2348 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 2349 | for (i = 0; i < -delta; i++) |
28ef6c31 | 2350 | tputs (_rl_term_up, 1, _rl_output_character_function); |
ac50fbac | 2351 | #endif /* !__DJGPP__ */ |
726f6388 | 2352 | } |
bb70624e | 2353 | |
726f6388 JA |
2354 | _rl_last_v_pos = to; /* Now TO is here */ |
2355 | } | |
2356 | ||
2357 | /* Physically print C on rl_outstream. This is for functions which know | |
2358 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 2359 | int |
726f6388 JA |
2360 | rl_show_char (c) |
2361 | int c; | |
2362 | { | |
2363 | int n = 1; | |
2364 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
2365 | { | |
2366 | fprintf (rl_outstream, "M-"); | |
2367 | n += 2; | |
2368 | c = UNMETA (c); | |
2369 | } | |
2370 | ||
2371 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 2372 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 2373 | #else |
ccc6cda3 | 2374 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
2375 | #endif /* !DISPLAY_TABS */ |
2376 | { | |
2377 | fprintf (rl_outstream, "C-"); | |
2378 | n += 2; | |
ccc6cda3 | 2379 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
2380 | } |
2381 | ||
2382 | putc (c, rl_outstream); | |
2383 | fflush (rl_outstream); | |
2384 | return n; | |
2385 | } | |
2386 | ||
2387 | int | |
2388 | rl_character_len (c, pos) | |
2389 | register int c, pos; | |
2390 | { | |
2391 | unsigned char uc; | |
2392 | ||
2393 | uc = (unsigned char)c; | |
2394 | ||
2395 | if (META_CHAR (uc)) | |
2396 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
2397 | ||
2398 | if (uc == '\t') | |
2399 | { | |
2400 | #if defined (DISPLAY_TABS) | |
2401 | return (((pos | 7) + 1) - pos); | |
2402 | #else | |
2403 | return (2); | |
2404 | #endif /* !DISPLAY_TABS */ | |
2405 | } | |
2406 | ||
ccc6cda3 JA |
2407 | if (CTRL_CHAR (c) || c == RUBOUT) |
2408 | return (2); | |
2409 | ||
f73dda09 | 2410 | return ((ISPRINT (uc)) ? 1 : 2); |
726f6388 | 2411 | } |
726f6388 JA |
2412 | /* How to print things in the "echo-area". The prompt is treated as a |
2413 | mini-modeline. */ | |
95732b49 | 2414 | static int msg_saved_prompt = 0; |
726f6388 | 2415 | |
ccc6cda3 JA |
2416 | #if defined (USE_VARARGS) |
2417 | int | |
2418 | #if defined (PREFER_STDARG) | |
2419 | rl_message (const char *format, ...) | |
2420 | #else | |
726f6388 JA |
2421 | rl_message (va_alist) |
2422 | va_dcl | |
ccc6cda3 | 2423 | #endif |
726f6388 | 2424 | { |
726f6388 | 2425 | va_list args; |
ccc6cda3 JA |
2426 | #if defined (PREFER_VARARGS) |
2427 | char *format; | |
2428 | #endif | |
ac50fbac CR |
2429 | #if defined (HAVE_VSNPRINTF) |
2430 | int bneed; | |
2431 | #endif | |
726f6388 | 2432 | |
ccc6cda3 JA |
2433 | #if defined (PREFER_STDARG) |
2434 | va_start (args, format); | |
2435 | #else | |
726f6388 JA |
2436 | va_start (args); |
2437 | format = va_arg (args, char *); | |
ccc6cda3 JA |
2438 | #endif |
2439 | ||
ac50fbac CR |
2440 | if (msg_buf == 0) |
2441 | msg_buf = xmalloc (msg_bufsiz = 128); | |
2442 | ||
f73dda09 | 2443 | #if defined (HAVE_VSNPRINTF) |
a0c0a00f | 2444 | bneed = vsnprintf (msg_buf, msg_bufsiz, format, args); |
ac50fbac CR |
2445 | if (bneed >= msg_bufsiz - 1) |
2446 | { | |
2447 | msg_bufsiz = bneed + 1; | |
2448 | msg_buf = xrealloc (msg_buf, msg_bufsiz); | |
2449 | va_end (args); | |
2450 | ||
2451 | #if defined (PREFER_STDARG) | |
2452 | va_start (args, format); | |
2453 | #else | |
2454 | va_start (args); | |
2455 | format = va_arg (args, char *); | |
2456 | #endif | |
2457 | vsnprintf (msg_buf, msg_bufsiz - 1, format, args); | |
2458 | } | |
f73dda09 | 2459 | #else |
726f6388 | 2460 | vsprintf (msg_buf, format, args); |
ac50fbac | 2461 | msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */ |
f73dda09 | 2462 | #endif |
726f6388 JA |
2463 | va_end (args); |
2464 | ||
95732b49 JA |
2465 | if (saved_local_prompt == 0) |
2466 | { | |
2467 | rl_save_prompt (); | |
2468 | msg_saved_prompt = 1; | |
2469 | } | |
ac50fbac CR |
2470 | else if (local_prompt != saved_local_prompt) |
2471 | { | |
2472 | FREE (local_prompt); | |
2473 | FREE (local_prompt_prefix); | |
2474 | local_prompt = (char *)NULL; | |
2475 | } | |
726f6388 | 2476 | rl_display_prompt = msg_buf; |
a0c0a00f CR |
2477 | local_prompt = expand_prompt (msg_buf, 0, &prompt_visible_length, |
2478 | &prompt_last_invisible, | |
2479 | &prompt_invis_chars_first_line, | |
2480 | &prompt_physical_chars); | |
95732b49 | 2481 | local_prompt_prefix = (char *)NULL; |
0628567a | 2482 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 2483 | (*rl_redisplay_function) (); |
95732b49 | 2484 | |
726f6388 JA |
2485 | return 0; |
2486 | } | |
ccc6cda3 JA |
2487 | #else /* !USE_VARARGS */ |
2488 | int | |
726f6388 JA |
2489 | rl_message (format, arg1, arg2) |
2490 | char *format; | |
2491 | { | |
ac50fbac CR |
2492 | if (msg_buf == 0) |
2493 | msg_buf = xmalloc (msg_bufsiz = 128); | |
2494 | ||
726f6388 | 2495 | sprintf (msg_buf, format, arg1, arg2); |
ac50fbac | 2496 | msg_buf[msg_bufsiz - 1] = '\0'; /* overflow? */ |
95732b49 | 2497 | |
726f6388 | 2498 | rl_display_prompt = msg_buf; |
95732b49 JA |
2499 | if (saved_local_prompt == 0) |
2500 | { | |
2501 | rl_save_prompt (); | |
2502 | msg_saved_prompt = 1; | |
2503 | } | |
ac50fbac CR |
2504 | else if (local_prompt != saved_local_prompt) |
2505 | { | |
2506 | FREE (local_prompt); | |
2507 | FREE (local_prompt_prefix); | |
2508 | local_prompt = (char *)NULL; | |
2509 | } | |
a0c0a00f CR |
2510 | local_prompt = expand_prompt (msg_buf, 0, &prompt_visible_length, |
2511 | &prompt_last_invisible, | |
2512 | &prompt_invis_chars_first_line, | |
2513 | &prompt_physical_chars); | |
95732b49 | 2514 | local_prompt_prefix = (char *)NULL; |
0628567a | 2515 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
ccc6cda3 | 2516 | (*rl_redisplay_function) (); |
95732b49 | 2517 | |
726f6388 JA |
2518 | return 0; |
2519 | } | |
ccc6cda3 | 2520 | #endif /* !USE_VARARGS */ |
726f6388 JA |
2521 | |
2522 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 2523 | int |
726f6388 JA |
2524 | rl_clear_message () |
2525 | { | |
2526 | rl_display_prompt = rl_prompt; | |
95732b49 JA |
2527 | if (msg_saved_prompt) |
2528 | { | |
2529 | rl_restore_prompt (); | |
2530 | msg_saved_prompt = 0; | |
2531 | } | |
ccc6cda3 | 2532 | (*rl_redisplay_function) (); |
726f6388 JA |
2533 | return 0; |
2534 | } | |
2535 | ||
ccc6cda3 | 2536 | int |
726f6388 JA |
2537 | rl_reset_line_state () |
2538 | { | |
2539 | rl_on_new_line (); | |
2540 | ||
2541 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
2542 | forced_display = 1; | |
2543 | return 0; | |
2544 | } | |
2545 | ||
ccc6cda3 | 2546 | void |
b72432fd | 2547 | rl_save_prompt () |
ccc6cda3 JA |
2548 | { |
2549 | saved_local_prompt = local_prompt; | |
2550 | saved_local_prefix = local_prompt_prefix; | |
95732b49 | 2551 | saved_prefix_length = prompt_prefix_length; |
0628567a | 2552 | saved_local_length = local_prompt_len; |
28ef6c31 JA |
2553 | saved_last_invisible = prompt_last_invisible; |
2554 | saved_visible_length = prompt_visible_length; | |
b80f6443 JA |
2555 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
2556 | saved_physical_chars = prompt_physical_chars; | |
ccc6cda3 JA |
2557 | |
2558 | local_prompt = local_prompt_prefix = (char *)0; | |
0628567a | 2559 | local_prompt_len = 0; |
95732b49 | 2560 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
b80f6443 | 2561 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
ccc6cda3 JA |
2562 | } |
2563 | ||
2564 | void | |
b72432fd | 2565 | rl_restore_prompt () |
ccc6cda3 | 2566 | { |
28ef6c31 JA |
2567 | FREE (local_prompt); |
2568 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
2569 | |
2570 | local_prompt = saved_local_prompt; | |
2571 | local_prompt_prefix = saved_local_prefix; | |
0628567a | 2572 | local_prompt_len = saved_local_length; |
95732b49 | 2573 | prompt_prefix_length = saved_prefix_length; |
28ef6c31 JA |
2574 | prompt_last_invisible = saved_last_invisible; |
2575 | prompt_visible_length = saved_visible_length; | |
b80f6443 JA |
2576 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
2577 | prompt_physical_chars = saved_physical_chars; | |
95732b49 JA |
2578 | |
2579 | /* can test saved_local_prompt to see if prompt info has been saved. */ | |
2580 | saved_local_prompt = saved_local_prefix = (char *)0; | |
0628567a | 2581 | saved_local_length = 0; |
95732b49 JA |
2582 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; |
2583 | saved_invis_chars_first_line = saved_physical_chars = 0; | |
ccc6cda3 JA |
2584 | } |
2585 | ||
2586 | char * | |
2587 | _rl_make_prompt_for_search (pchar) | |
2588 | int pchar; | |
2589 | { | |
2590 | int len; | |
0628567a | 2591 | char *pmt, *p; |
ccc6cda3 | 2592 | |
b72432fd | 2593 | rl_save_prompt (); |
ccc6cda3 | 2594 | |
0628567a JA |
2595 | /* We've saved the prompt, and can do anything with the various prompt |
2596 | strings we need before they're restored. We want the unexpanded | |
2597 | portion of the prompt string after any final newline. */ | |
2598 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; | |
2599 | if (p == 0) | |
ccc6cda3 JA |
2600 | { |
2601 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
f73dda09 | 2602 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 2603 | if (len) |
b72432fd | 2604 | strcpy (pmt, rl_prompt); |
ccc6cda3 JA |
2605 | pmt[len] = pchar; |
2606 | pmt[len+1] = '\0'; | |
2607 | } | |
2608 | else | |
2609 | { | |
0628567a JA |
2610 | p++; |
2611 | len = strlen (p); | |
f73dda09 | 2612 | pmt = (char *)xmalloc (len + 2); |
ccc6cda3 | 2613 | if (len) |
0628567a | 2614 | strcpy (pmt, p); |
ccc6cda3 JA |
2615 | pmt[len] = pchar; |
2616 | pmt[len+1] = '\0'; | |
0628567a | 2617 | } |
b80f6443 | 2618 | |
0628567a | 2619 | /* will be overwritten by expand_prompt, called from rl_message */ |
95732b49 | 2620 | prompt_physical_chars = saved_physical_chars + 1; |
ccc6cda3 JA |
2621 | return pmt; |
2622 | } | |
2623 | ||
726f6388 JA |
2624 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
2625 | void | |
2626 | _rl_erase_at_end_of_line (l) | |
2627 | int l; | |
2628 | { | |
2629 | register int i; | |
2630 | ||
ccc6cda3 | 2631 | _rl_backspace (l); |
726f6388 JA |
2632 | for (i = 0; i < l; i++) |
2633 | putc (' ', rl_outstream); | |
ccc6cda3 | 2634 | _rl_backspace (l); |
726f6388 JA |
2635 | for (i = 0; i < l; i++) |
2636 | visible_line[--_rl_last_c_pos] = '\0'; | |
2637 | rl_display_fixed++; | |
2638 | } | |
2639 | ||
2640 | /* Clear to the end of the line. COUNT is the minimum | |
2641 | number of character spaces to clear, */ | |
d166f048 JA |
2642 | void |
2643 | _rl_clear_to_eol (count) | |
726f6388 JA |
2644 | int count; |
2645 | { | |
ac50fbac | 2646 | #ifndef __MSDOS__ |
28ef6c31 JA |
2647 | if (_rl_term_clreol) |
2648 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
ac50fbac CR |
2649 | else |
2650 | #endif | |
2651 | if (count) | |
2652 | space_to_eol (count); | |
726f6388 JA |
2653 | } |
2654 | ||
2655 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
2656 | number of character spaces to clear, */ | |
2657 | static void | |
2658 | space_to_eol (count) | |
2659 | int count; | |
2660 | { | |
2661 | register int i; | |
2662 | ||
2663 | for (i = 0; i < count; i++) | |
2664 | putc (' ', rl_outstream); | |
2665 | ||
2666 | _rl_last_c_pos += count; | |
2667 | } | |
2668 | ||
d166f048 JA |
2669 | void |
2670 | _rl_clear_screen () | |
2671 | { | |
ac50fbac | 2672 | #ifndef __DJGPP__ |
28ef6c31 JA |
2673 | if (_rl_term_clrpag) |
2674 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 2675 | else |
28ef6c31 | 2676 | rl_crlf (); |
ac50fbac CR |
2677 | #else |
2678 | ScreenClear (); | |
2679 | ScreenSetCursor (0, 0); | |
2680 | #endif /* __DJGPP__ */ | |
d166f048 JA |
2681 | } |
2682 | ||
7117c2d2 | 2683 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
726f6388 | 2684 | static void |
7117c2d2 | 2685 | insert_some_chars (string, count, col) |
726f6388 | 2686 | char *string; |
7117c2d2 | 2687 | int count, col; |
726f6388 | 2688 | { |
ac50fbac | 2689 | open_some_spaces (col); |
95732b49 | 2690 | _rl_output_some_chars (string, count); |
ac50fbac CR |
2691 | } |
2692 | ||
2693 | /* Insert COL spaces, keeping the cursor at the same position. We follow the | |
2694 | ncurses documentation and use either im/ei with explicit spaces, or IC/ic | |
2695 | by itself. We assume there will either be ei or we don't need to use it. */ | |
2696 | static void | |
2697 | open_some_spaces (col) | |
2698 | int col; | |
2699 | { | |
a0c0a00f | 2700 | #if !defined (__MSDOS__) && (!defined (__MINGW32__) || defined (NCURSES_VERSION)) |
ac50fbac CR |
2701 | char *buffer; |
2702 | register int i; | |
7117c2d2 | 2703 | |
726f6388 | 2704 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 2705 | if (_rl_term_IC) |
726f6388 | 2706 | { |
7117c2d2 | 2707 | buffer = tgoto (_rl_term_IC, 0, col); |
726f6388 | 2708 | tputs (buffer, 1, _rl_output_character_function); |
726f6388 | 2709 | } |
ac50fbac | 2710 | else if (_rl_term_im && *_rl_term_im) |
726f6388 | 2711 | { |
ac50fbac CR |
2712 | tputs (_rl_term_im, 1, _rl_output_character_function); |
2713 | /* just output the desired number of spaces */ | |
2714 | for (i = col; i--; ) | |
2715 | _rl_output_character_function (' '); | |
2716 | /* If there is a string to turn off insert mode, use it now. */ | |
28ef6c31 JA |
2717 | if (_rl_term_ei && *_rl_term_ei) |
2718 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
ac50fbac CR |
2719 | /* and move back the right number of spaces */ |
2720 | _rl_backspace (col); | |
2721 | } | |
2722 | else if (_rl_term_ic && *_rl_term_ic) | |
2723 | { | |
2724 | /* If there is a special command for inserting characters, then | |
2725 | use that first to open up the space. */ | |
2726 | for (i = col; i--; ) | |
2727 | tputs (_rl_term_ic, 1, _rl_output_character_function); | |
726f6388 | 2728 | } |
a0c0a00f | 2729 | #endif /* !__MSDOS__ && (!__MINGW32__ || NCURSES_VERSION)*/ |
726f6388 JA |
2730 | } |
2731 | ||
2732 | /* Delete COUNT characters from the display line. */ | |
2733 | static void | |
2734 | delete_chars (count) | |
2735 | int count; | |
2736 | { | |
28ef6c31 | 2737 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
2738 | return; |
2739 | ||
a0c0a00f | 2740 | #if !defined (__MSDOS__) && (!defined (__MINGW32__) || defined (NCURSES_VERSION)) |
28ef6c31 | 2741 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 2742 | { |
ccc6cda3 | 2743 | char *buffer; |
28ef6c31 | 2744 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
2745 | tputs (buffer, count, _rl_output_character_function); |
2746 | } | |
2747 | else | |
2748 | { | |
28ef6c31 | 2749 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 2750 | while (count--) |
28ef6c31 | 2751 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 2752 | } |
a0c0a00f | 2753 | #endif /* !__MSDOS__ && (!__MINGW32__ || NCURSES_VERSION)*/ |
726f6388 JA |
2754 | } |
2755 | ||
2756 | void | |
2757 | _rl_update_final () | |
2758 | { | |
2759 | int full_lines; | |
2760 | ||
2761 | full_lines = 0; | |
ccc6cda3 JA |
2762 | /* If the cursor is the only thing on an otherwise-blank last line, |
2763 | compensate so we don't print an extra CRLF. */ | |
2764 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 2765 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
2766 | { |
2767 | _rl_vis_botlin--; | |
2768 | full_lines = 1; | |
2769 | } | |
2770 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 2771 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 2772 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 2773 | { |
726f6388 | 2774 | char *last_line; |
7117c2d2 | 2775 | |
bb70624e | 2776 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
0628567a JA |
2777 | cpos_buffer_position = -1; /* don't know where we are in buffer */ |
2778 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); /* XXX */ | |
d166f048 | 2779 | _rl_clear_to_eol (0); |
28ef6c31 | 2780 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
2781 | } |
2782 | _rl_vis_botlin = 0; | |
28ef6c31 | 2783 | rl_crlf (); |
726f6388 JA |
2784 | fflush (rl_outstream); |
2785 | rl_display_fixed++; | |
2786 | } | |
2787 | ||
2788 | /* Move to the start of the current line. */ | |
2789 | static void | |
2790 | cr () | |
2791 | { | |
28ef6c31 | 2792 | if (_rl_term_cr) |
726f6388 | 2793 | { |
bb70624e JA |
2794 | #if defined (__MSDOS__) |
2795 | putc ('\r', rl_outstream); | |
2796 | #else | |
28ef6c31 | 2797 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2798 | #endif |
726f6388 JA |
2799 | _rl_last_c_pos = 0; |
2800 | } | |
2801 | } | |
2802 | ||
bb70624e JA |
2803 | /* Redraw the last line of a multi-line prompt that may possibly contain |
2804 | terminal escape sequences. Called with the cursor at column 0 of the | |
2805 | line to draw the prompt on. */ | |
2806 | static void | |
2807 | redraw_prompt (t) | |
2808 | char *t; | |
2809 | { | |
95732b49 | 2810 | char *oldp; |
bb70624e | 2811 | |
bb70624e | 2812 | oldp = rl_display_prompt; |
95732b49 | 2813 | rl_save_prompt (); |
bb70624e JA |
2814 | |
2815 | rl_display_prompt = t; | |
a0c0a00f CR |
2816 | local_prompt = expand_prompt (t, PMT_MULTILINE, |
2817 | &prompt_visible_length, | |
28ef6c31 | 2818 | &prompt_last_invisible, |
b80f6443 JA |
2819 | &prompt_invis_chars_first_line, |
2820 | &prompt_physical_chars); | |
bb70624e | 2821 | local_prompt_prefix = (char *)NULL; |
0628567a | 2822 | local_prompt_len = local_prompt ? strlen (local_prompt) : 0; |
95732b49 | 2823 | |
bb70624e JA |
2824 | rl_forced_update_display (); |
2825 | ||
2826 | rl_display_prompt = oldp; | |
95732b49 | 2827 | rl_restore_prompt(); |
bb70624e JA |
2828 | } |
2829 | ||
726f6388 JA |
2830 | /* Redisplay the current line after a SIGWINCH is received. */ |
2831 | void | |
2832 | _rl_redisplay_after_sigwinch () | |
2833 | { | |
bb70624e | 2834 | char *t; |
726f6388 | 2835 | |
3185942a JA |
2836 | /* Clear the last line (assuming that the screen size change will result in |
2837 | either more or fewer characters on that line only) and put the cursor at | |
2838 | column 0. Make sure the right thing happens if we have wrapped to a new | |
2839 | screen line. */ | |
28ef6c31 | 2840 | if (_rl_term_cr) |
726f6388 | 2841 | { |
3185942a JA |
2842 | _rl_move_vert (_rl_vis_botlin); |
2843 | ||
bb70624e JA |
2844 | #if defined (__MSDOS__) |
2845 | putc ('\r', rl_outstream); | |
2846 | #else | |
28ef6c31 | 2847 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 2848 | #endif |
726f6388 | 2849 | _rl_last_c_pos = 0; |
bb70624e | 2850 | #if defined (__MSDOS__) |
28ef6c31 | 2851 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
2852 | putc ('\r', rl_outstream); |
2853 | #else | |
28ef6c31 JA |
2854 | if (_rl_term_clreol) |
2855 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
2856 | else |
2857 | { | |
28ef6c31 JA |
2858 | space_to_eol (_rl_screenwidth); |
2859 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 2860 | } |
bb70624e | 2861 | #endif |
726f6388 JA |
2862 | if (_rl_last_v_pos > 0) |
2863 | _rl_move_vert (0); | |
2864 | } | |
2865 | else | |
28ef6c31 | 2866 | rl_crlf (); |
726f6388 JA |
2867 | |
2868 | /* Redraw only the last line of a multi-line prompt. */ | |
2869 | t = strrchr (rl_display_prompt, '\n'); | |
2870 | if (t) | |
bb70624e | 2871 | redraw_prompt (++t); |
726f6388 JA |
2872 | else |
2873 | rl_forced_update_display (); | |
2874 | } | |
ccc6cda3 JA |
2875 | |
2876 | void | |
2877 | _rl_clean_up_for_exit () | |
2878 | { | |
3185942a | 2879 | if (_rl_echoing_p) |
ccc6cda3 | 2880 | { |
b7ec1810 CR |
2881 | if (_rl_vis_botlin > 0) /* minor optimization plus bug fix */ |
2882 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 JA |
2883 | _rl_vis_botlin = 0; |
2884 | fflush (rl_outstream); | |
b72432fd | 2885 | rl_restart_output (1, 0); |
ccc6cda3 JA |
2886 | } |
2887 | } | |
b72432fd JA |
2888 | |
2889 | void | |
2890 | _rl_erase_entire_line () | |
2891 | { | |
2892 | cr (); | |
2893 | _rl_clear_to_eol (0); | |
2894 | cr (); | |
2895 | fflush (rl_outstream); | |
2896 | } | |
bb70624e | 2897 | |
a0c0a00f CR |
2898 | void |
2899 | _rl_ttyflush () | |
2900 | { | |
2901 | fflush (rl_outstream); | |
2902 | } | |
2903 | ||
bb70624e JA |
2904 | /* return the `current display line' of the cursor -- the number of lines to |
2905 | move up to get to the first screen line of the current readline line. */ | |
2906 | int | |
2907 | _rl_current_display_line () | |
2908 | { | |
2909 | int ret, nleft; | |
2910 | ||
2911 | /* Find out whether or not there might be invisible characters in the | |
2912 | editing buffer. */ | |
2913 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 2914 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 2915 | else |
28ef6c31 | 2916 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
2917 | |
2918 | if (nleft > 0) | |
28ef6c31 | 2919 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
2920 | else |
2921 | ret = 0; | |
2922 | ||
2923 | return ret; | |
2924 | } | |
7117c2d2 JA |
2925 | |
2926 | #if defined (HANDLE_MULTIBYTE) | |
2927 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2928 | In the case of multibyte characters with stateful encoding, we have to | |
2929 | scan from the beginning of the string to take the state into account. */ | |
2930 | static int | |
0001803f | 2931 | _rl_col_width (str, start, end, flags) |
b80f6443 | 2932 | const char *str; |
0001803f | 2933 | int start, end, flags; |
7117c2d2 JA |
2934 | { |
2935 | wchar_t wc; | |
0628567a | 2936 | mbstate_t ps; |
7117c2d2 JA |
2937 | int tmp, point, width, max; |
2938 | ||
2939 | if (end <= start) | |
2940 | return 0; | |
f1be666c | 2941 | if (MB_CUR_MAX == 1 || rl_byte_oriented) |
ac50fbac | 2942 | /* this can happen in some cases where it's inconvenient to check */ |
f1be666c | 2943 | return (end - start); |
7117c2d2 | 2944 | |
0628567a JA |
2945 | memset (&ps, 0, sizeof (mbstate_t)); |
2946 | ||
7117c2d2 JA |
2947 | point = 0; |
2948 | max = end; | |
2949 | ||
0001803f CR |
2950 | /* Try to short-circuit common cases. The adjustment to remove wrap_offset |
2951 | is done by the caller. */ | |
2952 | /* 1. prompt string */ | |
2953 | if (flags && start == 0 && end == local_prompt_len && memcmp (str, local_prompt, local_prompt_len) == 0) | |
2954 | return (prompt_physical_chars + wrap_offset); | |
2955 | /* 2. prompt string + line contents */ | |
2956 | else if (flags && start == 0 && local_prompt_len > 0 && end > local_prompt_len && local_prompt && memcmp (str, local_prompt, local_prompt_len) == 0) | |
2957 | { | |
2958 | tmp = prompt_physical_chars + wrap_offset; | |
2959 | /* XXX - try to call ourselves recursively with non-prompt portion */ | |
2960 | tmp += _rl_col_width (str, local_prompt_len, end, flags); | |
2961 | return (tmp); | |
2962 | } | |
2963 | ||
7117c2d2 JA |
2964 | while (point < start) |
2965 | { | |
2966 | tmp = mbrlen (str + point, max, &ps); | |
b80f6443 | 2967 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2968 | { |
2969 | /* In this case, the bytes are invalid or too short to compose a | |
2970 | multibyte character, so we assume that the first byte represents | |
2971 | a single character. */ | |
2972 | point++; | |
2973 | max--; | |
2974 | ||
2975 | /* Clear the state of the byte sequence, because in this case the | |
2976 | effect of mbstate is undefined. */ | |
2977 | memset (&ps, 0, sizeof (mbstate_t)); | |
2978 | } | |
b80f6443 JA |
2979 | else if (MB_NULLWCH (tmp)) |
2980 | break; /* Found '\0' */ | |
7117c2d2 JA |
2981 | else |
2982 | { | |
2983 | point += tmp; | |
2984 | max -= tmp; | |
2985 | } | |
2986 | } | |
2987 | ||
2988 | /* If START is not a byte that starts a character, then POINT will be | |
2989 | greater than START. In this case, assume that (POINT - START) gives | |
2990 | a byte count that is the number of columns of difference. */ | |
2991 | width = point - start; | |
2992 | ||
2993 | while (point < end) | |
2994 | { | |
2995 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
b80f6443 | 2996 | if (MB_INVALIDCH ((size_t)tmp)) |
7117c2d2 JA |
2997 | { |
2998 | /* In this case, the bytes are invalid or too short to compose a | |
2999 | multibyte character, so we assume that the first byte represents | |
3000 | a single character. */ | |
3001 | point++; | |
3002 | max--; | |
3003 | ||
3004 | /* and assume that the byte occupies a single column. */ | |
3005 | width++; | |
3006 | ||
3007 | /* Clear the state of the byte sequence, because in this case the | |
3008 | effect of mbstate is undefined. */ | |
3009 | memset (&ps, 0, sizeof (mbstate_t)); | |
3010 | } | |
b80f6443 JA |
3011 | else if (MB_NULLWCH (tmp)) |
3012 | break; /* Found '\0' */ | |
7117c2d2 JA |
3013 | else |
3014 | { | |
3015 | point += tmp; | |
3016 | max -= tmp; | |
ac50fbac | 3017 | tmp = WCWIDTH(wc); |
7117c2d2 JA |
3018 | width += (tmp >= 0) ? tmp : 1; |
3019 | } | |
3020 | } | |
3021 | ||
3022 | width += point - end; | |
3023 | ||
3024 | return width; | |
3025 | } | |
3026 | #endif /* HANDLE_MULTIBYTE */ |