Commit | Line | Data |
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d60d9f65 SS |
1 | /* display.c -- readline redisplay facility. */ |
2 | ||
3 | /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of the GNU Readline Library, a library for | |
6 | reading lines of text with interactive input and history editing. | |
7 | ||
8 | The GNU Readline Library is free software; you can redistribute it | |
9 | and/or modify it under the terms of the GNU General Public License | |
f9267e15 | 10 | as published by the Free Software Foundation; either version 2, or |
d60d9f65 SS |
11 | (at your option) any later version. |
12 | ||
13 | The GNU Readline Library is distributed in the hope that it will be | |
14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | The GNU General Public License is often shipped with GNU software, and | |
19 | is generally kept in a file called COPYING or LICENSE. If you do not | |
20 | have a copy of the license, write to the Free Software Foundation, | |
f9267e15 | 21 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
d60d9f65 SS |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <sys/types.h> | |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
34 | #include "posixstat.h" | |
35 | ||
36 | #if defined (HAVE_STDLIB_H) | |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
42 | #include <stdio.h> | |
43 | ||
d60d9f65 SS |
44 | /* System-specific feature definitions and include files. */ |
45 | #include "rldefs.h" | |
84041b4c | 46 | #include "rlmbutil.h" |
d60d9f65 SS |
47 | |
48 | /* Termcap library stuff. */ | |
49 | #include "tcap.h" | |
50 | ||
51 | /* Some standard library routines. */ | |
52 | #include "readline.h" | |
53 | #include "history.h" | |
54 | ||
f9267e15 EZ |
55 | #include "rlprivate.h" |
56 | #include "xmalloc.h" | |
57 | ||
d60d9f65 SS |
58 | #if !defined (strchr) && !defined (__STDC__) |
59 | extern char *strchr (), *strrchr (); | |
60 | #endif /* !strchr && !__STDC__ */ | |
61 | ||
f9267e15 | 62 | #if defined (HACK_TERMCAP_MOTION) |
84041b4c | 63 | extern char *_rl_term_forward_char; |
d60d9f65 | 64 | #endif |
d60d9f65 | 65 | |
84041b4c EZ |
66 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
67 | static void space_to_eol PARAMS((int)); | |
68 | static void delete_chars PARAMS((int)); | |
69 | static void insert_some_chars PARAMS((char *, int, int)); | |
70 | static void cr PARAMS((void)); | |
71 | ||
72 | #if defined (HANDLE_MULTIBYTE) | |
73 | static int _rl_col_width PARAMS((char *, int, int)); | |
74 | static int *_rl_wrapped_line; | |
75 | #else | |
76 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) | |
77 | #endif | |
d60d9f65 SS |
78 | |
79 | static int *inv_lbreaks, *vis_lbreaks; | |
f9267e15 | 80 | static int inv_lbsize, vis_lbsize; |
d60d9f65 SS |
81 | |
82 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
83 | by backing up or outputting a carriage return and moving forward. */ | |
84 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
85 | ||
86 | /* **************************************************************** */ | |
87 | /* */ | |
88 | /* Display stuff */ | |
89 | /* */ | |
90 | /* **************************************************************** */ | |
91 | ||
92 | /* This is the stuff that is hard for me. I never seem to write good | |
93 | display routines in C. Let's see how I do this time. */ | |
94 | ||
95 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
96 | the problems of input lines longer than the screen width. | |
97 | ||
98 | update_line and the code that calls it makes a multiple line, | |
99 | automatically wrapping line update. Careful attention needs | |
100 | to be paid to the vertical position variables. */ | |
101 | ||
102 | /* Keep two buffers; one which reflects the current contents of the | |
103 | screen, and the other to draw what we think the new contents should | |
104 | be. Then compare the buffers, and make whatever changes to the | |
105 | screen itself that we should. Finally, make the buffer that we | |
106 | just drew into be the one which reflects the current contents of the | |
107 | screen, and place the cursor where it belongs. | |
108 | ||
109 | Commands that want to can fix the display themselves, and then let | |
110 | this function know that the display has been fixed by setting the | |
111 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
112 | ||
113 | /* Application-specific redisplay function. */ | |
84041b4c | 114 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
d60d9f65 SS |
115 | |
116 | /* Global variables declared here. */ | |
117 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
118 | int rl_display_fixed = 0; | |
119 | ||
120 | int _rl_suppress_redisplay = 0; | |
121 | ||
122 | /* The stuff that gets printed out before the actual text of the line. | |
123 | This is usually pointing to rl_prompt. */ | |
124 | char *rl_display_prompt = (char *)NULL; | |
125 | ||
126 | /* Pseudo-global variables declared here. */ | |
127 | /* The visible cursor position. If you print some text, adjust this. */ | |
128 | int _rl_last_c_pos = 0; | |
129 | int _rl_last_v_pos = 0; | |
130 | ||
131 | /* Number of lines currently on screen minus 1. */ | |
132 | int _rl_vis_botlin = 0; | |
133 | ||
134 | /* Variables used only in this file. */ | |
135 | /* The last left edge of text that was displayed. This is used when | |
136 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
137 | static int last_lmargin; | |
138 | ||
139 | /* The line display buffers. One is the line currently displayed on | |
140 | the screen. The other is the line about to be displayed. */ | |
141 | static char *visible_line = (char *)NULL; | |
142 | static char *invisible_line = (char *)NULL; | |
143 | ||
144 | /* A buffer for `modeline' messages. */ | |
145 | static char msg_buf[128]; | |
146 | ||
147 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
148 | static int forced_display; | |
149 | ||
150 | /* Default and initial buffer size. Can grow. */ | |
151 | static int line_size = 1024; | |
152 | ||
84041b4c EZ |
153 | /* Variables to keep track of the expanded prompt string, which may |
154 | include invisible characters. */ | |
155 | ||
d60d9f65 | 156 | static char *local_prompt, *local_prompt_prefix; |
84041b4c | 157 | static int prompt_visible_length, prompt_prefix_length; |
d60d9f65 SS |
158 | |
159 | /* The number of invisible characters in the line currently being | |
160 | displayed on the screen. */ | |
161 | static int visible_wrap_offset; | |
162 | ||
84041b4c EZ |
163 | /* The number of invisible characters in the prompt string. Static so it |
164 | can be shared between rl_redisplay and update_line */ | |
d60d9f65 SS |
165 | static int wrap_offset; |
166 | ||
84041b4c EZ |
167 | /* The index of the last invisible character in the prompt string. */ |
168 | static int prompt_last_invisible; | |
d60d9f65 SS |
169 | |
170 | /* The length (buffer offset) of the first line of the last (possibly | |
171 | multi-line) buffer displayed on the screen. */ | |
172 | static int visible_first_line_len; | |
173 | ||
84041b4c EZ |
174 | /* Number of invisible characters on the first physical line of the prompt. |
175 | Only valid when the number of physical characters in the prompt exceeds | |
176 | (or is equal to) _rl_screenwidth. */ | |
177 | static int prompt_invis_chars_first_line; | |
178 | ||
179 | static int prompt_last_screen_line; | |
180 | ||
d60d9f65 SS |
181 | /* Expand the prompt string S and return the number of visible |
182 | characters in *LP, if LP is not null. This is currently more-or-less | |
183 | a placeholder for expansion. LIP, if non-null is a place to store the | |
84041b4c EZ |
184 | index of the last invisible character in the returned string. NIFLP, |
185 | if non-zero, is a place to store the number of invisible characters in | |
186 | the first prompt line. */ | |
d60d9f65 SS |
187 | |
188 | /* Current implementation: | |
189 | \001 (^A) start non-visible characters | |
190 | \002 (^B) end non-visible characters | |
191 | all characters except \001 and \002 (following a \001) are copied to | |
192 | the returned string; all characters except those between \001 and | |
193 | \002 are assumed to be `visible'. */ | |
194 | ||
195 | static char * | |
84041b4c | 196 | expand_prompt (pmt, lp, lip, niflp) |
d60d9f65 | 197 | char *pmt; |
84041b4c | 198 | int *lp, *lip, *niflp; |
d60d9f65 SS |
199 | { |
200 | char *r, *ret, *p; | |
84041b4c | 201 | int l, rl, last, ignoring, ninvis, invfl; |
d60d9f65 SS |
202 | |
203 | /* Short-circuit if we can. */ | |
204 | if (strchr (pmt, RL_PROMPT_START_IGNORE) == 0) | |
205 | { | |
206 | r = savestring (pmt); | |
207 | if (lp) | |
208 | *lp = strlen (r); | |
209 | return r; | |
210 | } | |
211 | ||
212 | l = strlen (pmt); | |
84041b4c EZ |
213 | r = ret = (char *)xmalloc (l + 1); |
214 | ||
215 | invfl = 0; /* invisible chars in first line of prompt */ | |
216 | ||
217 | for (rl = ignoring = last = ninvis = 0, p = pmt; p && *p; p++) | |
d60d9f65 SS |
218 | { |
219 | /* This code strips the invisible character string markers | |
220 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
221 | if (*p == RL_PROMPT_START_IGNORE) | |
222 | { | |
223 | ignoring++; | |
224 | continue; | |
225 | } | |
226 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
227 | { | |
228 | ignoring = 0; | |
229 | last = r - ret - 1; | |
230 | continue; | |
231 | } | |
232 | else | |
233 | { | |
234 | *r++ = *p; | |
235 | if (!ignoring) | |
236 | rl++; | |
84041b4c EZ |
237 | else |
238 | ninvis++; | |
239 | if (rl == _rl_screenwidth) | |
240 | invfl = ninvis; | |
d60d9f65 SS |
241 | } |
242 | } | |
243 | ||
84041b4c EZ |
244 | if (rl < _rl_screenwidth) |
245 | invfl = ninvis; | |
246 | ||
d60d9f65 SS |
247 | *r = '\0'; |
248 | if (lp) | |
249 | *lp = rl; | |
250 | if (lip) | |
251 | *lip = last; | |
84041b4c EZ |
252 | if (niflp) |
253 | *niflp = invfl; | |
d60d9f65 SS |
254 | return ret; |
255 | } | |
256 | ||
f9267e15 EZ |
257 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
258 | PMT and return the rest of PMT. */ | |
259 | char * | |
260 | _rl_strip_prompt (pmt) | |
261 | char *pmt; | |
262 | { | |
263 | char *ret; | |
264 | ||
84041b4c | 265 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL); |
f9267e15 EZ |
266 | return ret; |
267 | } | |
268 | ||
d60d9f65 SS |
269 | /* |
270 | * Expand the prompt string into the various display components, if | |
271 | * necessary. | |
272 | * | |
273 | * local_prompt = expanded last line of string in rl_display_prompt | |
274 | * (portion after the final newline) | |
275 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
276 | * expanded via expand_prompt | |
84041b4c EZ |
277 | * prompt_visible_length = number of visible characters in local_prompt |
278 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
d60d9f65 SS |
279 | * |
280 | * This function is called once per call to readline(). It may also be | |
281 | * called arbitrarily to expand the primary prompt. | |
282 | * | |
283 | * The return value is the number of visible characters on the last line | |
284 | * of the (possibly multi-line) prompt. | |
285 | */ | |
286 | int | |
287 | rl_expand_prompt (prompt) | |
288 | char *prompt; | |
289 | { | |
290 | char *p, *t; | |
291 | int c; | |
292 | ||
293 | /* Clear out any saved values. */ | |
84041b4c EZ |
294 | FREE (local_prompt); |
295 | FREE (local_prompt_prefix); | |
296 | ||
d60d9f65 | 297 | local_prompt = local_prompt_prefix = (char *)0; |
84041b4c | 298 | prompt_last_invisible = prompt_visible_length = 0; |
d60d9f65 SS |
299 | |
300 | if (prompt == 0 || *prompt == 0) | |
301 | return (0); | |
302 | ||
303 | p = strrchr (prompt, '\n'); | |
304 | if (!p) | |
305 | { | |
84041b4c EZ |
306 | /* The prompt is only one logical line, though it might wrap. */ |
307 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
308 | &prompt_last_invisible, | |
309 | &prompt_invis_chars_first_line); | |
d60d9f65 | 310 | local_prompt_prefix = (char *)0; |
84041b4c | 311 | return (prompt_visible_length); |
d60d9f65 SS |
312 | } |
313 | else | |
314 | { | |
315 | /* The prompt spans multiple lines. */ | |
316 | t = ++p; | |
84041b4c EZ |
317 | local_prompt = expand_prompt (p, &prompt_visible_length, |
318 | &prompt_last_invisible, | |
319 | &prompt_invis_chars_first_line); | |
d60d9f65 SS |
320 | c = *t; *t = '\0'; |
321 | /* The portion of the prompt string up to and including the | |
322 | final newline is now null-terminated. */ | |
84041b4c EZ |
323 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
324 | (int *)NULL, | |
325 | &prompt_invis_chars_first_line); | |
d60d9f65 | 326 | *t = c; |
84041b4c | 327 | return (prompt_prefix_length); |
d60d9f65 SS |
328 | } |
329 | } | |
330 | ||
f9267e15 EZ |
331 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
332 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
333 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
334 | increased. If the lines have already been allocated, this ensures that | |
335 | they can hold at least MINSIZE characters. */ | |
336 | static void | |
337 | init_line_structures (minsize) | |
338 | int minsize; | |
339 | { | |
340 | register int n; | |
341 | ||
342 | if (invisible_line == 0) /* initialize it */ | |
343 | { | |
344 | if (line_size < minsize) | |
345 | line_size = minsize; | |
84041b4c EZ |
346 | visible_line = (char *)xmalloc (line_size); |
347 | invisible_line = (char *)xmalloc (line_size); | |
f9267e15 EZ |
348 | } |
349 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
350 | { | |
351 | line_size *= 2; | |
352 | if (line_size < minsize) | |
353 | line_size = minsize; | |
84041b4c EZ |
354 | visible_line = (char *)xrealloc (visible_line, line_size); |
355 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
f9267e15 EZ |
356 | } |
357 | ||
358 | for (n = minsize; n < line_size; n++) | |
359 | { | |
360 | visible_line[n] = 0; | |
361 | invisible_line[n] = 1; | |
362 | } | |
363 | ||
364 | if (vis_lbreaks == 0) | |
365 | { | |
366 | /* should be enough. */ | |
367 | inv_lbsize = vis_lbsize = 256; | |
368 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
369 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
84041b4c EZ |
370 | #if defined (HANDLE_MULTIBYTE) |
371 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
372 | #endif | |
f9267e15 EZ |
373 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
374 | } | |
375 | } | |
376 | ||
d60d9f65 SS |
377 | /* Basic redisplay algorithm. */ |
378 | void | |
379 | rl_redisplay () | |
380 | { | |
381 | register int in, out, c, linenum, cursor_linenum; | |
382 | register char *line; | |
383 | int c_pos, inv_botlin, lb_botlin, lb_linenum; | |
384 | int newlines, lpos, temp; | |
385 | char *prompt_this_line; | |
84041b4c EZ |
386 | #if defined (HANDLE_MULTIBYTE) |
387 | wchar_t wc; | |
388 | size_t wc_bytes; | |
389 | int wc_width; | |
390 | mbstate_t ps; | |
391 | int _rl_wrapped_multicolumn = 0; | |
392 | #endif | |
d60d9f65 SS |
393 | |
394 | if (!readline_echoing_p) | |
395 | return; | |
396 | ||
397 | if (!rl_display_prompt) | |
398 | rl_display_prompt = ""; | |
399 | ||
400 | if (invisible_line == 0) | |
401 | { | |
f9267e15 | 402 | init_line_structures (0); |
d60d9f65 SS |
403 | rl_on_new_line (); |
404 | } | |
405 | ||
406 | /* Draw the line into the buffer. */ | |
407 | c_pos = -1; | |
408 | ||
409 | line = invisible_line; | |
410 | out = inv_botlin = 0; | |
411 | ||
412 | /* Mark the line as modified or not. We only do this for history | |
413 | lines. */ | |
414 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) | |
415 | { | |
416 | line[out++] = '*'; | |
417 | line[out] = '\0'; | |
418 | } | |
419 | ||
420 | /* If someone thought that the redisplay was handled, but the currently | |
421 | visible line has a different modification state than the one about | |
422 | to become visible, then correct the caller's misconception. */ | |
423 | if (visible_line[0] != invisible_line[0]) | |
424 | rl_display_fixed = 0; | |
425 | ||
426 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
427 | one passed to readline()), use the values we have already expanded. | |
428 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
429 | number of non-visible characters in the prompt string. */ | |
430 | if (rl_display_prompt == rl_prompt || local_prompt) | |
431 | { | |
432 | int local_len = local_prompt ? strlen (local_prompt) : 0; | |
433 | if (local_prompt_prefix && forced_display) | |
434 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
435 | ||
436 | if (local_len > 0) | |
437 | { | |
c862e87b JM |
438 | temp = local_len + out + 2; |
439 | if (temp >= line_size) | |
440 | { | |
441 | line_size = (temp + 1024) - (temp % 1024); | |
84041b4c EZ |
442 | visible_line = (char *)xrealloc (visible_line, line_size); |
443 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
c862e87b | 444 | } |
d60d9f65 SS |
445 | strncpy (line + out, local_prompt, local_len); |
446 | out += local_len; | |
447 | } | |
448 | line[out] = '\0'; | |
84041b4c | 449 | wrap_offset = local_len - prompt_visible_length; |
d60d9f65 SS |
450 | } |
451 | else | |
452 | { | |
453 | int pmtlen; | |
454 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
455 | if (!prompt_this_line) | |
456 | prompt_this_line = rl_display_prompt; | |
457 | else | |
458 | { | |
459 | prompt_this_line++; | |
f9267e15 | 460 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
d60d9f65 SS |
461 | if (forced_display) |
462 | { | |
f9267e15 | 463 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
d60d9f65 SS |
464 | /* Make sure we are at column zero even after a newline, |
465 | regardless of the state of terminal output processing. */ | |
f9267e15 | 466 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
d60d9f65 SS |
467 | cr (); |
468 | } | |
469 | } | |
470 | ||
471 | pmtlen = strlen (prompt_this_line); | |
c862e87b JM |
472 | temp = pmtlen + out + 2; |
473 | if (temp >= line_size) | |
474 | { | |
475 | line_size = (temp + 1024) - (temp % 1024); | |
84041b4c EZ |
476 | visible_line = (char *)xrealloc (visible_line, line_size); |
477 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); | |
c862e87b | 478 | } |
d60d9f65 SS |
479 | strncpy (line + out, prompt_this_line, pmtlen); |
480 | out += pmtlen; | |
481 | line[out] = '\0'; | |
84041b4c | 482 | wrap_offset = prompt_invis_chars_first_line = 0; |
d60d9f65 SS |
483 | } |
484 | ||
f9267e15 EZ |
485 | #define CHECK_INV_LBREAKS() \ |
486 | do { \ | |
487 | if (newlines >= (inv_lbsize - 2)) \ | |
488 | { \ | |
489 | inv_lbsize *= 2; \ | |
490 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
491 | } \ | |
492 | } while (0) | |
84041b4c EZ |
493 | |
494 | #if defined (HANDLE_MULTIBYTE) | |
d60d9f65 SS |
495 | #define CHECK_LPOS() \ |
496 | do { \ | |
c862e87b | 497 | lpos++; \ |
84041b4c | 498 | if (lpos >= _rl_screenwidth) \ |
c862e87b | 499 | { \ |
f9267e15 EZ |
500 | if (newlines >= (inv_lbsize - 2)) \ |
501 | { \ | |
502 | inv_lbsize *= 2; \ | |
503 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
84041b4c | 504 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
f9267e15 | 505 | } \ |
c862e87b | 506 | inv_lbreaks[++newlines] = out; \ |
84041b4c | 507 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
c862e87b JM |
508 | lpos = 0; \ |
509 | } \ | |
d60d9f65 | 510 | } while (0) |
84041b4c EZ |
511 | #else |
512 | #define CHECK_LPOS() \ | |
513 | do { \ | |
514 | lpos++; \ | |
515 | if (lpos >= _rl_screenwidth) \ | |
516 | { \ | |
517 | if (newlines >= (inv_lbsize - 2)) \ | |
518 | { \ | |
519 | inv_lbsize *= 2; \ | |
520 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
521 | } \ | |
522 | inv_lbreaks[++newlines] = out; \ | |
523 | lpos = 0; \ | |
524 | } \ | |
525 | } while (0) | |
526 | #endif | |
d60d9f65 SS |
527 | |
528 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
529 | inv_lbreaks[newlines = 0] = 0; | |
530 | lpos = out - wrap_offset; | |
84041b4c EZ |
531 | #if defined (HANDLE_MULTIBYTE) |
532 | memset (_rl_wrapped_line, 0, vis_lbsize); | |
533 | #endif | |
534 | ||
535 | /* prompt_invis_chars_first_line is the number of invisible characters in | |
536 | the first physical line of the prompt. | |
537 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
538 | chars on the second line. */ | |
d60d9f65 | 539 | |
84041b4c | 540 | /* what if lpos is already >= _rl_screenwidth before we start drawing the |
d60d9f65 | 541 | contents of the command line? */ |
84041b4c | 542 | while (lpos >= _rl_screenwidth) |
d60d9f65 | 543 | { |
84041b4c EZ |
544 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
545 | invisible characters that is longer than the screen width. The | |
546 | prompt_invis_chars_first_line variable could be made into an array | |
547 | saying how many invisible characters there are per line, but that's | |
548 | probably too much work for the benefit gained. How many people have | |
549 | prompts that exceed two physical lines? */ | |
550 | temp = ((newlines + 1) * _rl_screenwidth) + | |
551 | #if 0 | |
552 | ((newlines == 0) ? prompt_invis_chars_first_line : 0) + | |
553 | #else | |
554 | ((newlines == 0 && local_prompt_prefix == 0) ? prompt_invis_chars_first_line : 0) + | |
555 | #endif | |
556 | ((newlines == 1) ? wrap_offset : 0); | |
f9267e15 | 557 | |
d60d9f65 | 558 | inv_lbreaks[++newlines] = temp; |
84041b4c | 559 | lpos -= _rl_screenwidth; |
d60d9f65 SS |
560 | } |
561 | ||
84041b4c EZ |
562 | prompt_last_screen_line = newlines; |
563 | ||
564 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
565 | track of where the cursor is (c_pos), the number of the line containing | |
566 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). | |
567 | It maintains an array of line breaks for display (inv_lbreaks). | |
568 | This handles expanding tabs for display and displaying meta characters. */ | |
d60d9f65 | 569 | lb_linenum = 0; |
84041b4c EZ |
570 | #if defined (HANDLE_MULTIBYTE) |
571 | in = 0; | |
572 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
573 | { | |
574 | memset (&ps, 0, sizeof (mbstate_t)); | |
575 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); | |
576 | } | |
577 | else | |
578 | wc_bytes = 1; | |
579 | while (in < rl_end) | |
580 | #else | |
d60d9f65 | 581 | for (in = 0; in < rl_end; in++) |
84041b4c | 582 | #endif |
d60d9f65 SS |
583 | { |
584 | c = (unsigned char)rl_line_buffer[in]; | |
585 | ||
84041b4c EZ |
586 | #if defined (HANDLE_MULTIBYTE) |
587 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
588 | { | |
589 | if (wc_bytes == (size_t)-1 || wc_bytes == (size_t)-2) | |
590 | { | |
591 | /* Byte sequence is invalid or shortened. Assume that the | |
592 | first byte represents a character. */ | |
593 | wc_bytes = 1; | |
594 | /* Assume that a character occupies a single column. */ | |
595 | wc_width = 1; | |
596 | memset (&ps, 0, sizeof (mbstate_t)); | |
597 | } | |
598 | else if (wc_bytes == (size_t)0) | |
599 | break; /* Found '\0' */ | |
600 | else | |
601 | { | |
602 | temp = wcwidth (wc); | |
603 | wc_width = (temp < 0) ? 1 : temp; | |
604 | } | |
605 | } | |
606 | #endif | |
607 | ||
d60d9f65 SS |
608 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
609 | { | |
610 | line_size *= 2; | |
84041b4c EZ |
611 | visible_line = (char *)xrealloc (visible_line, line_size); |
612 | invisible_line = (char *)xrealloc (invisible_line, line_size); | |
d60d9f65 SS |
613 | line = invisible_line; |
614 | } | |
615 | ||
616 | if (in == rl_point) | |
617 | { | |
618 | c_pos = out; | |
619 | lb_linenum = newlines; | |
620 | } | |
621 | ||
84041b4c EZ |
622 | #if defined (HANDLE_MULTIBYTE) |
623 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ | |
624 | #else | |
d60d9f65 | 625 | if (META_CHAR (c)) |
84041b4c | 626 | #endif |
d60d9f65 SS |
627 | { |
628 | if (_rl_output_meta_chars == 0) | |
629 | { | |
630 | sprintf (line + out, "\\%o", c); | |
631 | ||
84041b4c | 632 | if (lpos + 4 >= _rl_screenwidth) |
d60d9f65 | 633 | { |
84041b4c | 634 | temp = _rl_screenwidth - lpos; |
f9267e15 | 635 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
636 | inv_lbreaks[++newlines] = out + temp; |
637 | lpos = 4 - temp; | |
638 | } | |
639 | else | |
640 | lpos += 4; | |
641 | ||
642 | out += 4; | |
643 | } | |
644 | else | |
645 | { | |
646 | line[out++] = c; | |
647 | CHECK_LPOS(); | |
648 | } | |
649 | } | |
650 | #if defined (DISPLAY_TABS) | |
651 | else if (c == '\t') | |
652 | { | |
84041b4c | 653 | register int newout; |
c862e87b JM |
654 | |
655 | #if 0 | |
d60d9f65 | 656 | newout = (out | (int)7) + 1; |
c862e87b JM |
657 | #else |
658 | newout = out + 8 - lpos % 8; | |
659 | #endif | |
d60d9f65 | 660 | temp = newout - out; |
84041b4c | 661 | if (lpos + temp >= _rl_screenwidth) |
d60d9f65 SS |
662 | { |
663 | register int temp2; | |
84041b4c | 664 | temp2 = _rl_screenwidth - lpos; |
f9267e15 | 665 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
666 | inv_lbreaks[++newlines] = out + temp2; |
667 | lpos = temp - temp2; | |
668 | while (out < newout) | |
669 | line[out++] = ' '; | |
670 | } | |
671 | else | |
672 | { | |
673 | while (out < newout) | |
674 | line[out++] = ' '; | |
675 | lpos += temp; | |
676 | } | |
677 | } | |
678 | #endif | |
84041b4c | 679 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
c862e87b JM |
680 | { |
681 | line[out++] = '\0'; /* XXX - sentinel */ | |
f9267e15 | 682 | CHECK_INV_LBREAKS (); |
c862e87b JM |
683 | inv_lbreaks[++newlines] = out; |
684 | lpos = 0; | |
685 | } | |
d60d9f65 SS |
686 | else if (CTRL_CHAR (c) || c == RUBOUT) |
687 | { | |
688 | line[out++] = '^'; | |
689 | CHECK_LPOS(); | |
690 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
691 | CHECK_LPOS(); | |
692 | } | |
693 | else | |
694 | { | |
84041b4c EZ |
695 | #if defined (HANDLE_MULTIBYTE) |
696 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
697 | { | |
698 | register int i; | |
699 | ||
700 | _rl_wrapped_multicolumn = 0; | |
701 | ||
702 | if (_rl_screenwidth < lpos + wc_width) | |
703 | for (i = lpos; i < _rl_screenwidth; i++) | |
704 | { | |
705 | /* The space will be removed in update_line() */ | |
706 | line[out++] = ' '; | |
707 | _rl_wrapped_multicolumn++; | |
708 | CHECK_LPOS(); | |
709 | } | |
710 | if (in == rl_point) | |
711 | { | |
712 | c_pos = out; | |
713 | lb_linenum = newlines; | |
714 | } | |
715 | for (i = in; i < in+wc_bytes; i++) | |
716 | line[out++] = rl_line_buffer[i]; | |
717 | for (i = 0; i < wc_width; i++) | |
718 | CHECK_LPOS(); | |
719 | } | |
720 | else | |
721 | { | |
722 | line[out++] = c; | |
723 | CHECK_LPOS(); | |
724 | } | |
725 | #else | |
d60d9f65 SS |
726 | line[out++] = c; |
727 | CHECK_LPOS(); | |
84041b4c | 728 | #endif |
d60d9f65 | 729 | } |
84041b4c EZ |
730 | |
731 | #if defined (HANDLE_MULTIBYTE) | |
732 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
733 | { | |
734 | in += wc_bytes; | |
735 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); | |
736 | } | |
737 | else | |
738 | in++; | |
739 | #endif | |
740 | ||
d60d9f65 SS |
741 | } |
742 | line[out] = '\0'; | |
743 | if (c_pos < 0) | |
744 | { | |
745 | c_pos = out; | |
746 | lb_linenum = newlines; | |
747 | } | |
748 | ||
749 | inv_botlin = lb_botlin = newlines; | |
f9267e15 | 750 | CHECK_INV_LBREAKS (); |
d60d9f65 SS |
751 | inv_lbreaks[newlines+1] = out; |
752 | cursor_linenum = lb_linenum; | |
753 | ||
84041b4c EZ |
754 | /* C_POS == position in buffer where cursor should be placed. |
755 | CURSOR_LINENUM == line number where the cursor should be placed. */ | |
d60d9f65 SS |
756 | |
757 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
758 | line buffers are really multiple lines, which would wrap every | |
759 | (screenwidth - 1) characters. Go through each in turn, finding | |
760 | the changed region and updating it. The line order is top to bottom. */ | |
761 | ||
762 | /* If we can move the cursor up and down, then use multiple lines, | |
763 | otherwise, let long lines display in a single terminal line, and | |
764 | horizontally scroll it. */ | |
765 | ||
84041b4c | 766 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
d60d9f65 SS |
767 | { |
768 | int nleft, pos, changed_screen_line; | |
769 | ||
770 | if (!rl_display_fixed || forced_display) | |
771 | { | |
772 | forced_display = 0; | |
773 | ||
774 | /* If we have more than a screenful of material to display, then | |
775 | only display a screenful. We should display the last screen, | |
776 | not the first. */ | |
84041b4c EZ |
777 | if (out >= _rl_screenchars) |
778 | { | |
779 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
780 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); | |
781 | else | |
782 | out = _rl_screenchars - 1; | |
783 | } | |
d60d9f65 SS |
784 | |
785 | /* The first line is at character position 0 in the buffer. The | |
786 | second and subsequent lines start at inv_lbreaks[N], offset by | |
787 | OFFSET (which has already been calculated above). */ | |
788 | ||
789 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
790 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) | |
791 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
792 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
793 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) | |
794 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) | |
795 | ||
796 | /* For each line in the buffer, do the updating display. */ | |
797 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
798 | { | |
799 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, | |
800 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); | |
801 | ||
802 | /* If this is the line with the prompt, we might need to | |
803 | compensate for invisible characters in the new line. Do | |
804 | this only if there is not more than one new line (which | |
805 | implies that we completely overwrite the old visible line) | |
806 | and the new line is shorter than the old. Make sure we are | |
807 | at the end of the new line before clearing. */ | |
808 | if (linenum == 0 && | |
809 | inv_botlin == 0 && _rl_last_c_pos == out && | |
810 | (wrap_offset > visible_wrap_offset) && | |
811 | (_rl_last_c_pos < visible_first_line_len)) | |
812 | { | |
84041b4c | 813 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; |
d60d9f65 SS |
814 | if (nleft) |
815 | _rl_clear_to_eol (nleft); | |
816 | } | |
817 | ||
818 | /* Since the new first line is now visible, save its length. */ | |
819 | if (linenum == 0) | |
820 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; | |
821 | } | |
822 | ||
823 | /* We may have deleted some lines. If so, clear the left over | |
824 | blank ones at the bottom out. */ | |
825 | if (_rl_vis_botlin > inv_botlin) | |
826 | { | |
827 | char *tt; | |
828 | for (; linenum <= _rl_vis_botlin; linenum++) | |
829 | { | |
830 | tt = VIS_CHARS (linenum); | |
831 | _rl_move_vert (linenum); | |
832 | _rl_move_cursor_relative (0, tt); | |
833 | _rl_clear_to_eol | |
84041b4c | 834 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
d60d9f65 SS |
835 | } |
836 | } | |
837 | _rl_vis_botlin = inv_botlin; | |
838 | ||
839 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a | |
840 | different screen line during this redisplay. */ | |
841 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
842 | if (changed_screen_line) | |
843 | { | |
844 | _rl_move_vert (cursor_linenum); | |
84041b4c | 845 | /* If we moved up to the line with the prompt using _rl_term_up, |
c862e87b JM |
846 | the physical cursor position on the screen stays the same, |
847 | but the buffer position needs to be adjusted to account | |
848 | for invisible characters. */ | |
d60d9f65 | 849 | if (cursor_linenum == 0 && wrap_offset) |
c862e87b | 850 | _rl_last_c_pos += wrap_offset; |
d60d9f65 SS |
851 | } |
852 | ||
853 | /* We have to reprint the prompt if it contains invisible | |
854 | characters, since it's not generally OK to just reprint | |
855 | the characters from the current cursor position. But we | |
856 | only need to reprint it if the cursor is before the last | |
857 | invisible character in the prompt string. */ | |
84041b4c | 858 | nleft = prompt_visible_length + wrap_offset; |
d60d9f65 | 859 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
84041b4c | 860 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
d60d9f65 | 861 | { |
f9267e15 EZ |
862 | #if defined (__MSDOS__) |
863 | putc ('\r', rl_outstream); | |
864 | #else | |
84041b4c EZ |
865 | if (_rl_term_cr) |
866 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
f9267e15 | 867 | #endif |
d60d9f65 | 868 | _rl_output_some_chars (local_prompt, nleft); |
84041b4c EZ |
869 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
870 | _rl_last_c_pos = _rl_col_width(local_prompt, 0, nleft); | |
871 | else | |
872 | _rl_last_c_pos = nleft; | |
d60d9f65 SS |
873 | } |
874 | ||
875 | /* Where on that line? And where does that line start | |
876 | in the buffer? */ | |
877 | pos = inv_lbreaks[cursor_linenum]; | |
878 | /* nleft == number of characters in the line buffer between the | |
879 | start of the line and the cursor position. */ | |
880 | nleft = c_pos - pos; | |
881 | ||
882 | /* Since _rl_backspace() doesn't know about invisible characters in the | |
883 | prompt, and there's no good way to tell it, we compensate for | |
884 | those characters here and call _rl_backspace() directly. */ | |
885 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) | |
886 | { | |
887 | _rl_backspace (_rl_last_c_pos - nleft); | |
84041b4c EZ |
888 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
889 | _rl_last_c_pos = _rl_col_width (&visible_line[pos], 0, nleft); | |
890 | else | |
891 | _rl_last_c_pos = nleft; | |
d60d9f65 SS |
892 | } |
893 | ||
84041b4c EZ |
894 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
895 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
896 | else if (nleft != _rl_last_c_pos) | |
d60d9f65 SS |
897 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
898 | } | |
899 | } | |
900 | else /* Do horizontal scrolling. */ | |
901 | { | |
902 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
903 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
904 | ||
905 | /* Always at top line. */ | |
906 | _rl_last_v_pos = 0; | |
907 | ||
908 | /* Compute where in the buffer the displayed line should start. This | |
909 | will be LMARGIN. */ | |
910 | ||
911 | /* The number of characters that will be displayed before the cursor. */ | |
912 | ndisp = c_pos - wrap_offset; | |
84041b4c | 913 | nleft = prompt_visible_length + wrap_offset; |
d60d9f65 | 914 | /* Where the new cursor position will be on the screen. This can be |
c862e87b | 915 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
d60d9f65 | 916 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
84041b4c | 917 | t = _rl_screenwidth / 3; |
d60d9f65 SS |
918 | |
919 | /* If the number of characters had already exceeded the screenwidth, | |
c862e87b | 920 | last_lmargin will be > 0. */ |
d60d9f65 SS |
921 | |
922 | /* If the number of characters to be displayed is more than the screen | |
c862e87b JM |
923 | width, compute the starting offset so that the cursor is about |
924 | two-thirds of the way across the screen. */ | |
84041b4c | 925 | if (phys_c_pos > _rl_screenwidth - 2) |
d60d9f65 SS |
926 | { |
927 | lmargin = c_pos - (2 * t); | |
928 | if (lmargin < 0) | |
929 | lmargin = 0; | |
930 | /* If the left margin would be in the middle of a prompt with | |
931 | invisible characters, don't display the prompt at all. */ | |
932 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
933 | lmargin = nleft; | |
934 | } | |
84041b4c | 935 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
c862e87b | 936 | lmargin = 0; |
d60d9f65 SS |
937 | else if (phys_c_pos < 1) |
938 | { | |
939 | /* If we are moving back towards the beginning of the line and | |
940 | the last margin is no longer correct, compute a new one. */ | |
941 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ | |
942 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
943 | lmargin = nleft; | |
944 | } | |
945 | else | |
c862e87b | 946 | lmargin = last_lmargin; |
d60d9f65 SS |
947 | |
948 | /* If the first character on the screen isn't the first character | |
949 | in the display line, indicate this with a special character. */ | |
950 | if (lmargin > 0) | |
951 | line[lmargin] = '<'; | |
952 | ||
953 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
c862e87b JM |
954 | the whole line, indicate that with a special character at the |
955 | right edge of the screen. If LMARGIN is 0, we need to take the | |
956 | wrap offset into account. */ | |
84041b4c | 957 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
d60d9f65 | 958 | if (t < out) |
c862e87b | 959 | line[t - 1] = '>'; |
d60d9f65 SS |
960 | |
961 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
962 | { | |
963 | forced_display = 0; | |
964 | update_line (&visible_line[last_lmargin], | |
965 | &invisible_line[lmargin], | |
966 | 0, | |
84041b4c EZ |
967 | _rl_screenwidth + visible_wrap_offset, |
968 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
d60d9f65 SS |
969 | 0); |
970 | ||
971 | /* If the visible new line is shorter than the old, but the number | |
972 | of invisible characters is greater, and we are at the end of | |
973 | the new line, we need to clear to eol. */ | |
974 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
975 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
976 | (_rl_last_c_pos == out) && | |
977 | t < visible_first_line_len) | |
978 | { | |
84041b4c | 979 | nleft = _rl_screenwidth - t; |
d60d9f65 SS |
980 | _rl_clear_to_eol (nleft); |
981 | } | |
982 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
84041b4c EZ |
983 | if (visible_first_line_len > _rl_screenwidth) |
984 | visible_first_line_len = _rl_screenwidth; | |
d60d9f65 SS |
985 | |
986 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); | |
987 | last_lmargin = lmargin; | |
988 | } | |
989 | } | |
990 | fflush (rl_outstream); | |
991 | ||
992 | /* Swap visible and non-visible lines. */ | |
993 | { | |
84041b4c | 994 | char *vtemp = visible_line; |
f9267e15 EZ |
995 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
996 | ||
d60d9f65 | 997 | visible_line = invisible_line; |
84041b4c | 998 | invisible_line = vtemp; |
f9267e15 | 999 | |
d60d9f65 SS |
1000 | vis_lbreaks = inv_lbreaks; |
1001 | inv_lbreaks = itemp; | |
f9267e15 EZ |
1002 | |
1003 | vis_lbsize = inv_lbsize; | |
1004 | inv_lbsize = ntemp; | |
1005 | ||
d60d9f65 SS |
1006 | rl_display_fixed = 0; |
1007 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
1008 | are not displaying any invisible characters, so set visible_wrap_offset | |
1009 | to 0. */ | |
1010 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
1011 | visible_wrap_offset = 0; | |
1012 | else | |
1013 | visible_wrap_offset = wrap_offset; | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | /* PWP: update_line() is based on finding the middle difference of each | |
1018 | line on the screen; vis: | |
1019 | ||
1020 | /old first difference | |
1021 | /beginning of line | /old last same /old EOL | |
1022 | v v v v | |
1023 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
1024 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
1025 | ^ ^ ^ ^ | |
1026 | \beginning of line | \new last same \new end of line | |
1027 | \new first difference | |
1028 | ||
1029 | All are character pointers for the sake of speed. Special cases for | |
c862e87b | 1030 | no differences, as well as for end of line additions must be handled. |
d60d9f65 SS |
1031 | |
1032 | Could be made even smarter, but this works well enough */ | |
1033 | static void | |
1034 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
1035 | register char *old, *new; | |
1036 | int current_line, omax, nmax, inv_botlin; | |
1037 | { | |
1038 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
1039 | int temp, lendiff, wsatend, od, nd; | |
1040 | int current_invis_chars; | |
84041b4c EZ |
1041 | int col_lendiff, col_temp; |
1042 | #if defined (HANDLE_MULTIBYTE) | |
1043 | mbstate_t ps_new, ps_old; | |
1044 | int new_offset, old_offset, tmp; | |
1045 | #endif | |
d60d9f65 SS |
1046 | |
1047 | /* If we're at the right edge of a terminal that supports xn, we're | |
1048 | ready to wrap around, so do so. This fixes problems with knowing | |
1049 | the exact cursor position and cut-and-paste with certain terminal | |
1050 | emulators. In this calculation, TEMP is the physical screen | |
1051 | position of the cursor. */ | |
1052 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
84041b4c EZ |
1053 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
1054 | && _rl_last_v_pos == current_line - 1) | |
d60d9f65 | 1055 | { |
84041b4c EZ |
1056 | #if defined (HANDLE_MULTIBYTE) |
1057 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1058 | { | |
1059 | wchar_t wc; | |
1060 | mbstate_t ps; | |
1061 | int tempwidth, bytes; | |
1062 | size_t ret; | |
1063 | ||
1064 | /* This fixes only double-column characters, but if the wrapped | |
1065 | character comsumes more than three columns, spaces will be | |
1066 | inserted in the string buffer. */ | |
1067 | if (_rl_wrapped_line[current_line] > 0) | |
1068 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); | |
1069 | ||
1070 | memset (&ps, 0, sizeof (mbstate_t)); | |
1071 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); | |
1072 | if (ret == (size_t)-1 || ret == (size_t)-2) | |
1073 | { | |
1074 | tempwidth = 1; | |
1075 | ret = 1; | |
1076 | } | |
1077 | else if (ret == 0) | |
1078 | tempwidth = 0; | |
1079 | else | |
1080 | tempwidth = wcwidth (wc); | |
1081 | ||
1082 | if (tempwidth > 0) | |
1083 | { | |
1084 | int count; | |
1085 | bytes = ret; | |
1086 | for (count = 0; count < bytes; count++) | |
1087 | putc (new[count], rl_outstream); | |
1088 | _rl_last_c_pos = tempwidth; | |
1089 | _rl_last_v_pos++; | |
1090 | memset (&ps, 0, sizeof (mbstate_t)); | |
1091 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); | |
1092 | if (ret != 0 && bytes != 0) | |
1093 | { | |
1094 | if (ret == (size_t)-1 || ret == (size_t)-2) | |
1095 | memmove (old+bytes, old+1, strlen (old+1)); | |
1096 | else | |
1097 | memmove (old+bytes, old+ret, strlen (old+ret)); | |
1098 | memcpy (old, new, bytes); | |
1099 | } | |
1100 | } | |
1101 | else | |
1102 | { | |
1103 | putc (' ', rl_outstream); | |
1104 | _rl_last_c_pos = 1; | |
1105 | _rl_last_v_pos++; | |
1106 | if (old[0] && new[0]) | |
1107 | old[0] = new[0]; | |
1108 | } | |
1109 | } | |
d60d9f65 | 1110 | else |
84041b4c EZ |
1111 | #endif |
1112 | { | |
1113 | if (new[0]) | |
1114 | putc (new[0], rl_outstream); | |
1115 | else | |
1116 | putc (' ', rl_outstream); | |
1117 | _rl_last_c_pos = 1; /* XXX */ | |
1118 | _rl_last_v_pos++; | |
1119 | if (old[0] && new[0]) | |
1120 | old[0] = new[0]; | |
1121 | } | |
d60d9f65 | 1122 | } |
84041b4c | 1123 | |
d60d9f65 SS |
1124 | |
1125 | /* Find first difference. */ | |
84041b4c EZ |
1126 | #if defined (HANDLE_MULTIBYTE) |
1127 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1128 | { | |
1129 | memset (&ps_new, 0, sizeof(mbstate_t)); | |
1130 | memset (&ps_old, 0, sizeof(mbstate_t)); | |
1131 | ||
1132 | new_offset = old_offset = 0; | |
1133 | for (ofd = old, nfd = new; | |
1134 | (ofd - old < omax) && *ofd && | |
1135 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) | |
1136 | { | |
1137 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); | |
1138 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); | |
1139 | ofd = old + old_offset; | |
1140 | nfd = new + new_offset; | |
1141 | } | |
1142 | } | |
1143 | else | |
1144 | #endif | |
d60d9f65 SS |
1145 | for (ofd = old, nfd = new; |
1146 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
1147 | ofd++, nfd++) | |
1148 | ; | |
1149 | ||
1150 | /* Move to the end of the screen line. ND and OD are used to keep track | |
1151 | of the distance between ne and new and oe and old, respectively, to | |
1152 | move a subtraction out of each loop. */ | |
1153 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
1154 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
1155 | ||
1156 | /* If no difference, continue to next line. */ | |
1157 | if (ofd == oe && nfd == ne) | |
1158 | return; | |
1159 | ||
1160 | wsatend = 1; /* flag for trailing whitespace */ | |
84041b4c EZ |
1161 | |
1162 | #if defined (HANDLE_MULTIBYTE) | |
1163 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1164 | { | |
1165 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); | |
1166 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); | |
1167 | while ((ols > ofd) && (nls > nfd)) | |
1168 | { | |
1169 | memset (&ps_old, 0, sizeof (mbstate_t)); | |
1170 | memset (&ps_new, 0, sizeof (mbstate_t)); | |
1171 | ||
1172 | _rl_adjust_point (old, ols - old, &ps_old); | |
1173 | _rl_adjust_point (new, nls - new, &ps_new); | |
1174 | ||
1175 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) | |
1176 | break; | |
1177 | ||
1178 | if (*ols == ' ') | |
1179 | wsatend = 0; | |
1180 | ||
1181 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); | |
1182 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); | |
1183 | } | |
1184 | } | |
1185 | else | |
1186 | { | |
1187 | #endif /* HANDLE_MULTIBYTE */ | |
d60d9f65 SS |
1188 | ols = oe - 1; /* find last same */ |
1189 | nls = ne - 1; | |
1190 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
1191 | { | |
1192 | if (*ols != ' ') | |
1193 | wsatend = 0; | |
1194 | ols--; | |
1195 | nls--; | |
1196 | } | |
84041b4c EZ |
1197 | #if defined (HANDLE_MULTIBYTE) |
1198 | } | |
1199 | #endif | |
d60d9f65 SS |
1200 | |
1201 | if (wsatend) | |
1202 | { | |
1203 | ols = oe; | |
1204 | nls = ne; | |
1205 | } | |
84041b4c EZ |
1206 | #if defined (HANDLE_MULTIBYTE) |
1207 | /* This may not work for stateful encoding, but who cares? To handle | |
1208 | stateful encoding properly, we have to scan each string from the | |
1209 | beginning and compare. */ | |
1210 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) | |
1211 | #else | |
d60d9f65 | 1212 | else if (*ols != *nls) |
84041b4c | 1213 | #endif |
d60d9f65 SS |
1214 | { |
1215 | if (*ols) /* don't step past the NUL */ | |
84041b4c EZ |
1216 | { |
1217 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1218 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); | |
1219 | else | |
1220 | ols++; | |
1221 | } | |
d60d9f65 | 1222 | if (*nls) |
84041b4c EZ |
1223 | { |
1224 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1225 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); | |
1226 | else | |
1227 | nls++; | |
1228 | } | |
d60d9f65 SS |
1229 | } |
1230 | ||
1231 | /* count of invisible characters in the current invisible line. */ | |
1232 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
1233 | if (_rl_last_v_pos != current_line) | |
1234 | { | |
1235 | _rl_move_vert (current_line); | |
1236 | if (current_line == 0 && visible_wrap_offset) | |
1237 | _rl_last_c_pos += visible_wrap_offset; | |
1238 | } | |
1239 | ||
1240 | /* If this is the first line and there are invisible characters in the | |
1241 | prompt string, and the prompt string has not changed, and the current | |
1242 | cursor position is before the last invisible character in the prompt, | |
1243 | and the index of the character to move to is past the end of the prompt | |
1244 | string, then redraw the entire prompt string. We can only do this | |
1245 | reliably if the terminal supports a `cr' capability. | |
1246 | ||
1247 | This is not an efficiency hack -- there is a problem with redrawing | |
1248 | portions of the prompt string if they contain terminal escape | |
1249 | sequences (like drawing the `unbold' sequence without a corresponding | |
1250 | `bold') that manifests itself on certain terminals. */ | |
1251 | ||
1252 | lendiff = local_prompt ? strlen (local_prompt) : 0; | |
1253 | od = ofd - old; /* index of first difference in visible line */ | |
1254 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
84041b4c EZ |
1255 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
1256 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) | |
d60d9f65 | 1257 | { |
f9267e15 EZ |
1258 | #if defined (__MSDOS__) |
1259 | putc ('\r', rl_outstream); | |
1260 | #else | |
84041b4c | 1261 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
f9267e15 | 1262 | #endif |
d60d9f65 | 1263 | _rl_output_some_chars (local_prompt, lendiff); |
84041b4c EZ |
1264 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1265 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff); | |
1266 | else | |
1267 | _rl_last_c_pos = lendiff; | |
d60d9f65 SS |
1268 | } |
1269 | ||
1270 | _rl_move_cursor_relative (od, old); | |
1271 | ||
84041b4c EZ |
1272 | /* if (len (new) > len (old)) |
1273 | lendiff == difference in buffer | |
1274 | col_lendiff == difference on screen | |
1275 | When not using multibyte characters, these are equal */ | |
d60d9f65 | 1276 | lendiff = (nls - nfd) - (ols - ofd); |
84041b4c EZ |
1277 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1278 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); | |
1279 | else | |
1280 | col_lendiff = lendiff; | |
d60d9f65 SS |
1281 | |
1282 | /* If we are changing the number of invisible characters in a line, and | |
1283 | the spot of first difference is before the end of the invisible chars, | |
1284 | lendiff needs to be adjusted. */ | |
1285 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1286 | current_invis_chars != visible_wrap_offset) | |
84041b4c EZ |
1287 | { |
1288 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1289 | { | |
1290 | lendiff += visible_wrap_offset - current_invis_chars; | |
1291 | col_lendiff += visible_wrap_offset - current_invis_chars; | |
1292 | } | |
1293 | else | |
1294 | { | |
1295 | lendiff += visible_wrap_offset - current_invis_chars; | |
1296 | col_lendiff = lendiff; | |
1297 | } | |
1298 | } | |
d60d9f65 SS |
1299 | |
1300 | /* Insert (diff (len (old), len (new)) ch. */ | |
1301 | temp = ne - nfd; | |
84041b4c EZ |
1302 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1303 | col_temp = _rl_col_width (new, nfd - new, ne - new); | |
1304 | else | |
1305 | col_temp = temp; | |
1306 | ||
1307 | if (col_lendiff > 0) /* XXX - was lendiff */ | |
d60d9f65 SS |
1308 | { |
1309 | /* Non-zero if we're increasing the number of lines. */ | |
1310 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1311 | /* Sometimes it is cheaper to print the characters rather than | |
1312 | use the terminal's capabilities. If we're growing the number | |
1313 | of lines, make sure we actually cause the new line to wrap | |
1314 | around on auto-wrapping terminals. */ | |
84041b4c | 1315 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
d60d9f65 | 1316 | { |
84041b4c | 1317 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
d60d9f65 | 1318 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
84041b4c | 1319 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
d60d9f65 SS |
1320 | invisible characters. We need to just draw them. */ |
1321 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
84041b4c | 1322 | lendiff <= prompt_visible_length || !current_invis_chars)) |
d60d9f65 | 1323 | { |
84041b4c EZ |
1324 | insert_some_chars (nfd, lendiff, col_lendiff); |
1325 | _rl_last_c_pos += col_lendiff; | |
d60d9f65 SS |
1326 | } |
1327 | else if (*ols == 0) | |
1328 | { | |
1329 | /* At the end of a line the characters do not have to | |
1330 | be "inserted". They can just be placed on the screen. */ | |
1331 | /* However, this screws up the rest of this block, which | |
c862e87b | 1332 | assumes you've done the insert because you can. */ |
d60d9f65 | 1333 | _rl_output_some_chars (nfd, lendiff); |
84041b4c | 1334 | _rl_last_c_pos += col_lendiff; |
d60d9f65 SS |
1335 | } |
1336 | else | |
1337 | { | |
1338 | /* We have horizontal scrolling and we are not inserting at | |
1339 | the end. We have invisible characters in this line. This | |
1340 | is a dumb update. */ | |
1341 | _rl_output_some_chars (nfd, temp); | |
84041b4c | 1342 | _rl_last_c_pos += col_temp; |
d60d9f65 SS |
1343 | return; |
1344 | } | |
1345 | /* Copy (new) chars to screen from first diff to last match. */ | |
1346 | temp = nls - nfd; | |
1347 | if ((temp - lendiff) > 0) | |
1348 | { | |
1349 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
84041b4c EZ |
1350 | #if 0 |
1351 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff) - col_lendiff; | |
1352 | #else | |
1353 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); | |
1354 | #endif | |
d60d9f65 SS |
1355 | } |
1356 | } | |
1357 | else | |
1358 | { | |
1359 | /* cannot insert chars, write to EOL */ | |
1360 | _rl_output_some_chars (nfd, temp); | |
84041b4c | 1361 | _rl_last_c_pos += col_temp; |
d60d9f65 SS |
1362 | } |
1363 | } | |
1364 | else /* Delete characters from line. */ | |
1365 | { | |
1366 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
84041b4c | 1367 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
d60d9f65 SS |
1368 | { |
1369 | /* If all we're doing is erasing the invisible characters in the | |
1370 | prompt string, don't bother. It screws up the assumptions | |
1371 | about what's on the screen. */ | |
1372 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1373 | -lendiff == visible_wrap_offset) | |
84041b4c | 1374 | col_lendiff = 0; |
d60d9f65 | 1375 | |
84041b4c EZ |
1376 | if (col_lendiff) |
1377 | delete_chars (-col_lendiff); /* delete (diff) characters */ | |
d60d9f65 SS |
1378 | |
1379 | /* Copy (new) chars to screen from first diff to last match */ | |
1380 | temp = nls - nfd; | |
1381 | if (temp > 0) | |
1382 | { | |
1383 | _rl_output_some_chars (nfd, temp); | |
84041b4c | 1384 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp);; |
d60d9f65 SS |
1385 | } |
1386 | } | |
1387 | /* Otherwise, print over the existing material. */ | |
1388 | else | |
1389 | { | |
1390 | if (temp > 0) | |
1391 | { | |
1392 | _rl_output_some_chars (nfd, temp); | |
84041b4c | 1393 | _rl_last_c_pos += col_temp; |
d60d9f65 SS |
1394 | } |
1395 | lendiff = (oe - old) - (ne - new); | |
84041b4c EZ |
1396 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1397 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); | |
1398 | else | |
1399 | col_lendiff = lendiff; | |
1400 | ||
1401 | if (col_lendiff) | |
c862e87b JM |
1402 | { |
1403 | if (_rl_term_autowrap && current_line < inv_botlin) | |
84041b4c | 1404 | space_to_eol (col_lendiff); |
c862e87b | 1405 | else |
84041b4c | 1406 | _rl_clear_to_eol (col_lendiff); |
c862e87b | 1407 | } |
d60d9f65 SS |
1408 | } |
1409 | } | |
1410 | } | |
1411 | ||
1412 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
1413 | int | |
1414 | rl_on_new_line () | |
1415 | { | |
1416 | if (visible_line) | |
1417 | visible_line[0] = '\0'; | |
1418 | ||
1419 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1420 | _rl_vis_botlin = last_lmargin = 0; | |
1421 | if (vis_lbreaks) | |
1422 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1423 | visible_wrap_offset = 0; | |
1424 | return 0; | |
1425 | } | |
1426 | ||
f9267e15 EZ |
1427 | /* Tell the update routines that we have moved onto a new line with the |
1428 | prompt already displayed. Code originally from the version of readline | |
1429 | distributed with CLISP. */ | |
1430 | int | |
1431 | rl_on_new_line_with_prompt () | |
1432 | { | |
1433 | int prompt_size, i, l, real_screenwidth, newlines; | |
1434 | char *prompt_last_line; | |
1435 | ||
1436 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1437 | the already-displayed prompt. */ | |
1438 | prompt_size = strlen (rl_prompt) + 1; | |
1439 | init_line_structures (prompt_size); | |
1440 | ||
1441 | /* Make sure the line structures hold the already-displayed prompt for | |
1442 | redisplay. */ | |
1443 | strcpy (visible_line, rl_prompt); | |
1444 | strcpy (invisible_line, rl_prompt); | |
1445 | ||
1446 | /* If the prompt contains newlines, take the last tail. */ | |
1447 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1448 | if (!prompt_last_line) | |
1449 | prompt_last_line = rl_prompt; | |
1450 | ||
1451 | l = strlen (prompt_last_line); | |
84041b4c EZ |
1452 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
1453 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); | |
1454 | else | |
1455 | _rl_last_c_pos = l; | |
f9267e15 EZ |
1456 | |
1457 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1458 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1459 | one less, see terminal.c. */ | |
84041b4c | 1460 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
f9267e15 EZ |
1461 | _rl_last_v_pos = l / real_screenwidth; |
1462 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1463 | whether the cursor is at the end of the last line, or already at the | |
1464 | beginning of the next line. Output a newline just to be safe. */ | |
1465 | if (l > 0 && (l % real_screenwidth) == 0) | |
1466 | _rl_output_some_chars ("\n", 1); | |
1467 | last_lmargin = 0; | |
1468 | ||
1469 | newlines = 0; i = 0; | |
1470 | while (i <= l) | |
1471 | { | |
1472 | _rl_vis_botlin = newlines; | |
1473 | vis_lbreaks[newlines++] = i; | |
1474 | i += real_screenwidth; | |
1475 | } | |
1476 | vis_lbreaks[newlines] = l; | |
1477 | visible_wrap_offset = 0; | |
1478 | ||
1479 | return 0; | |
1480 | } | |
1481 | ||
d60d9f65 SS |
1482 | /* Actually update the display, period. */ |
1483 | int | |
1484 | rl_forced_update_display () | |
1485 | { | |
1486 | if (visible_line) | |
1487 | { | |
1488 | register char *temp = visible_line; | |
1489 | ||
1490 | while (*temp) | |
c862e87b | 1491 | *temp++ = '\0'; |
d60d9f65 SS |
1492 | } |
1493 | rl_on_new_line (); | |
1494 | forced_display++; | |
1495 | (*rl_redisplay_function) (); | |
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
1500 | DATA is the contents of the screen line of interest; i.e., where | |
1501 | the movement is being done. */ | |
1502 | void | |
1503 | _rl_move_cursor_relative (new, data) | |
1504 | int new; | |
84041b4c | 1505 | const char *data; |
d60d9f65 SS |
1506 | { |
1507 | register int i; | |
1508 | ||
1509 | /* If we don't have to do anything, then return. */ | |
84041b4c EZ |
1510 | #if defined (HANDLE_MULTIBYTE) |
1511 | /* If we have multibyte characters, NEW is indexed by the buffer point in | |
1512 | a multibyte string, but _rl_last_c_pos is the display position. In | |
1513 | this case, NEW's display position is not obvious. */ | |
1514 | if ((MB_CUR_MAX == 1 || rl_byte_oriented ) && _rl_last_c_pos == new) return; | |
1515 | #else | |
d60d9f65 | 1516 | if (_rl_last_c_pos == new) return; |
84041b4c | 1517 | #endif |
d60d9f65 SS |
1518 | |
1519 | /* It may be faster to output a CR, and then move forwards instead | |
1520 | of moving backwards. */ | |
1521 | /* i == current physical cursor position. */ | |
1522 | i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
1523 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || | |
84041b4c | 1524 | (_rl_term_autowrap && i == _rl_screenwidth)) |
d60d9f65 SS |
1525 | { |
1526 | #if defined (__MSDOS__) | |
1527 | putc ('\r', rl_outstream); | |
1528 | #else | |
84041b4c | 1529 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
d60d9f65 SS |
1530 | #endif /* !__MSDOS__ */ |
1531 | _rl_last_c_pos = 0; | |
1532 | } | |
1533 | ||
1534 | if (_rl_last_c_pos < new) | |
1535 | { | |
1536 | /* Move the cursor forward. We do it by printing the command | |
1537 | to move the cursor forward if there is one, else print that | |
1538 | portion of the output buffer again. Which is cheaper? */ | |
1539 | ||
1540 | /* The above comment is left here for posterity. It is faster | |
1541 | to print one character (non-control) than to print a control | |
1542 | sequence telling the terminal to move forward one character. | |
1543 | That kind of control is for people who don't know what the | |
1544 | data is underneath the cursor. */ | |
1545 | #if defined (HACK_TERMCAP_MOTION) | |
84041b4c EZ |
1546 | if (_rl_term_forward_char) |
1547 | { | |
1548 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1549 | { | |
1550 | int width; | |
1551 | width = _rl_col_width (data, _rl_last_c_pos, new); | |
1552 | for (i = 0; i < width; i++) | |
1553 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1554 | } | |
1555 | else | |
1556 | { | |
1557 | for (i = _rl_last_c_pos; i < new; i++) | |
1558 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); | |
1559 | } | |
1560 | } | |
1561 | else if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1562 | { | |
1563 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1564 | for (i = 0; i < new; i++) | |
1565 | putc (data[i], rl_outstream); | |
1566 | } | |
1567 | else | |
d60d9f65 | 1568 | for (i = _rl_last_c_pos; i < new; i++) |
84041b4c EZ |
1569 | putc (data[i], rl_outstream); |
1570 | ||
1571 | #else /* !HACK_TERMCAP_MOTION */ | |
1572 | ||
1573 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1574 | { | |
1575 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1576 | for (i = 0; i < new; i++) | |
1577 | putc (data[i], rl_outstream); | |
1578 | } | |
d60d9f65 SS |
1579 | else |
1580 | for (i = _rl_last_c_pos; i < new; i++) | |
1581 | putc (data[i], rl_outstream); | |
84041b4c EZ |
1582 | |
1583 | #endif /* !HACK_TERMCAP_MOTION */ | |
1584 | ||
d60d9f65 | 1585 | } |
84041b4c EZ |
1586 | #if defined (HANDLE_MULTIBYTE) |
1587 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. | |
1588 | The byte length of the string is probably bigger than the column width | |
1589 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's | |
1590 | display point is less than _rl_last_c_pos. */ | |
1591 | else if (_rl_last_c_pos >= new) | |
1592 | #else | |
c862e87b | 1593 | else if (_rl_last_c_pos > new) |
84041b4c EZ |
1594 | #endif |
1595 | { | |
1596 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1597 | { | |
1598 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
1599 | for (i = 0; i < new; i++) | |
1600 | putc (data[i], rl_outstream); | |
1601 | } | |
1602 | else | |
1603 | _rl_backspace (_rl_last_c_pos - new); | |
1604 | } | |
1605 | ||
1606 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1607 | _rl_last_c_pos = _rl_col_width (data, 0, new); | |
1608 | else | |
1609 | _rl_last_c_pos = new; | |
d60d9f65 SS |
1610 | } |
1611 | ||
1612 | /* PWP: move the cursor up or down. */ | |
1613 | void | |
1614 | _rl_move_vert (to) | |
1615 | int to; | |
1616 | { | |
1617 | register int delta, i; | |
1618 | ||
84041b4c | 1619 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
d60d9f65 SS |
1620 | return; |
1621 | ||
d60d9f65 SS |
1622 | if ((delta = to - _rl_last_v_pos) > 0) |
1623 | { | |
1624 | for (i = 0; i < delta; i++) | |
1625 | putc ('\n', rl_outstream); | |
f9267e15 EZ |
1626 | #if defined (__MSDOS__) |
1627 | putc ('\r', rl_outstream); | |
1628 | #else | |
84041b4c | 1629 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
f9267e15 | 1630 | #endif |
d60d9f65 SS |
1631 | _rl_last_c_pos = 0; |
1632 | } | |
1633 | else | |
1634 | { /* delta < 0 */ | |
84041b4c | 1635 | if (_rl_term_up && *_rl_term_up) |
d60d9f65 | 1636 | for (i = 0; i < -delta; i++) |
84041b4c | 1637 | tputs (_rl_term_up, 1, _rl_output_character_function); |
d60d9f65 | 1638 | } |
f9267e15 | 1639 | |
d60d9f65 SS |
1640 | _rl_last_v_pos = to; /* Now TO is here */ |
1641 | } | |
1642 | ||
1643 | /* Physically print C on rl_outstream. This is for functions which know | |
1644 | how to optimize the display. Return the number of characters output. */ | |
1645 | int | |
1646 | rl_show_char (c) | |
1647 | int c; | |
1648 | { | |
1649 | int n = 1; | |
1650 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1651 | { | |
1652 | fprintf (rl_outstream, "M-"); | |
1653 | n += 2; | |
1654 | c = UNMETA (c); | |
1655 | } | |
1656 | ||
1657 | #if defined (DISPLAY_TABS) | |
1658 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) | |
1659 | #else | |
1660 | if (CTRL_CHAR (c) || c == RUBOUT) | |
1661 | #endif /* !DISPLAY_TABS */ | |
1662 | { | |
1663 | fprintf (rl_outstream, "C-"); | |
1664 | n += 2; | |
1665 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
1666 | } | |
1667 | ||
1668 | putc (c, rl_outstream); | |
1669 | fflush (rl_outstream); | |
1670 | return n; | |
1671 | } | |
1672 | ||
1673 | int | |
1674 | rl_character_len (c, pos) | |
1675 | register int c, pos; | |
1676 | { | |
1677 | unsigned char uc; | |
1678 | ||
1679 | uc = (unsigned char)c; | |
1680 | ||
1681 | if (META_CHAR (uc)) | |
1682 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1683 | ||
1684 | if (uc == '\t') | |
1685 | { | |
1686 | #if defined (DISPLAY_TABS) | |
1687 | return (((pos | 7) + 1) - pos); | |
1688 | #else | |
1689 | return (2); | |
1690 | #endif /* !DISPLAY_TABS */ | |
1691 | } | |
1692 | ||
1693 | if (CTRL_CHAR (c) || c == RUBOUT) | |
1694 | return (2); | |
1695 | ||
84041b4c | 1696 | return ((ISPRINT (uc)) ? 1 : 2); |
d60d9f65 SS |
1697 | } |
1698 | ||
1699 | /* How to print things in the "echo-area". The prompt is treated as a | |
1700 | mini-modeline. */ | |
1701 | ||
1702 | #if defined (USE_VARARGS) | |
1703 | int | |
1704 | #if defined (PREFER_STDARG) | |
1705 | rl_message (const char *format, ...) | |
1706 | #else | |
1707 | rl_message (va_alist) | |
1708 | va_dcl | |
1709 | #endif | |
1710 | { | |
1711 | va_list args; | |
1712 | #if defined (PREFER_VARARGS) | |
1713 | char *format; | |
1714 | #endif | |
1715 | ||
1716 | #if defined (PREFER_STDARG) | |
1717 | va_start (args, format); | |
1718 | #else | |
1719 | va_start (args); | |
1720 | format = va_arg (args, char *); | |
1721 | #endif | |
1722 | ||
84041b4c EZ |
1723 | #if defined (HAVE_VSNPRINTF) |
1724 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); | |
1725 | #else | |
d60d9f65 | 1726 | vsprintf (msg_buf, format, args); |
84041b4c EZ |
1727 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
1728 | #endif | |
d60d9f65 SS |
1729 | va_end (args); |
1730 | ||
1731 | rl_display_prompt = msg_buf; | |
1732 | (*rl_redisplay_function) (); | |
1733 | return 0; | |
1734 | } | |
1735 | #else /* !USE_VARARGS */ | |
1736 | int | |
1737 | rl_message (format, arg1, arg2) | |
1738 | char *format; | |
1739 | { | |
1740 | sprintf (msg_buf, format, arg1, arg2); | |
84041b4c | 1741 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
d60d9f65 SS |
1742 | rl_display_prompt = msg_buf; |
1743 | (*rl_redisplay_function) (); | |
1744 | return 0; | |
1745 | } | |
1746 | #endif /* !USE_VARARGS */ | |
1747 | ||
1748 | /* How to clear things from the "echo-area". */ | |
1749 | int | |
1750 | rl_clear_message () | |
1751 | { | |
1752 | rl_display_prompt = rl_prompt; | |
1753 | (*rl_redisplay_function) (); | |
1754 | return 0; | |
1755 | } | |
1756 | ||
1757 | int | |
1758 | rl_reset_line_state () | |
1759 | { | |
1760 | rl_on_new_line (); | |
1761 | ||
1762 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
1763 | forced_display = 1; | |
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | static char *saved_local_prompt; | |
1768 | static char *saved_local_prefix; | |
1769 | static int saved_last_invisible; | |
1770 | static int saved_visible_length; | |
1771 | ||
1772 | void | |
c862e87b | 1773 | rl_save_prompt () |
d60d9f65 SS |
1774 | { |
1775 | saved_local_prompt = local_prompt; | |
1776 | saved_local_prefix = local_prompt_prefix; | |
84041b4c EZ |
1777 | saved_last_invisible = prompt_last_invisible; |
1778 | saved_visible_length = prompt_visible_length; | |
d60d9f65 SS |
1779 | |
1780 | local_prompt = local_prompt_prefix = (char *)0; | |
84041b4c | 1781 | prompt_last_invisible = prompt_visible_length = 0; |
d60d9f65 SS |
1782 | } |
1783 | ||
1784 | void | |
c862e87b | 1785 | rl_restore_prompt () |
d60d9f65 | 1786 | { |
84041b4c EZ |
1787 | FREE (local_prompt); |
1788 | FREE (local_prompt_prefix); | |
d60d9f65 SS |
1789 | |
1790 | local_prompt = saved_local_prompt; | |
1791 | local_prompt_prefix = saved_local_prefix; | |
84041b4c EZ |
1792 | prompt_last_invisible = saved_last_invisible; |
1793 | prompt_visible_length = saved_visible_length; | |
d60d9f65 SS |
1794 | } |
1795 | ||
1796 | char * | |
1797 | _rl_make_prompt_for_search (pchar) | |
1798 | int pchar; | |
1799 | { | |
1800 | int len; | |
1801 | char *pmt; | |
1802 | ||
c862e87b | 1803 | rl_save_prompt (); |
d60d9f65 SS |
1804 | |
1805 | if (saved_local_prompt == 0) | |
1806 | { | |
1807 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
84041b4c | 1808 | pmt = (char *)xmalloc (len + 2); |
d60d9f65 | 1809 | if (len) |
c862e87b | 1810 | strcpy (pmt, rl_prompt); |
d60d9f65 SS |
1811 | pmt[len] = pchar; |
1812 | pmt[len+1] = '\0'; | |
1813 | } | |
1814 | else | |
1815 | { | |
1816 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; | |
84041b4c | 1817 | pmt = (char *)xmalloc (len + 2); |
d60d9f65 | 1818 | if (len) |
c862e87b | 1819 | strcpy (pmt, saved_local_prompt); |
d60d9f65 SS |
1820 | pmt[len] = pchar; |
1821 | pmt[len+1] = '\0'; | |
1822 | local_prompt = savestring (pmt); | |
84041b4c EZ |
1823 | prompt_last_invisible = saved_last_invisible; |
1824 | prompt_visible_length = saved_visible_length + 1; | |
d60d9f65 SS |
1825 | } |
1826 | return pmt; | |
1827 | } | |
1828 | ||
1829 | /* Quick redisplay hack when erasing characters at the end of the line. */ | |
1830 | void | |
1831 | _rl_erase_at_end_of_line (l) | |
1832 | int l; | |
1833 | { | |
1834 | register int i; | |
1835 | ||
1836 | _rl_backspace (l); | |
1837 | for (i = 0; i < l; i++) | |
1838 | putc (' ', rl_outstream); | |
1839 | _rl_backspace (l); | |
1840 | for (i = 0; i < l; i++) | |
1841 | visible_line[--_rl_last_c_pos] = '\0'; | |
1842 | rl_display_fixed++; | |
1843 | } | |
1844 | ||
1845 | /* Clear to the end of the line. COUNT is the minimum | |
1846 | number of character spaces to clear, */ | |
1847 | void | |
1848 | _rl_clear_to_eol (count) | |
1849 | int count; | |
1850 | { | |
84041b4c EZ |
1851 | if (_rl_term_clreol) |
1852 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d60d9f65 | 1853 | else if (count) |
d60d9f65 SS |
1854 | space_to_eol (count); |
1855 | } | |
1856 | ||
1857 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
1858 | number of character spaces to clear, */ | |
1859 | static void | |
1860 | space_to_eol (count) | |
1861 | int count; | |
1862 | { | |
1863 | register int i; | |
1864 | ||
1865 | for (i = 0; i < count; i++) | |
1866 | putc (' ', rl_outstream); | |
1867 | ||
1868 | _rl_last_c_pos += count; | |
1869 | } | |
1870 | ||
1871 | void | |
1872 | _rl_clear_screen () | |
1873 | { | |
84041b4c EZ |
1874 | if (_rl_term_clrpag) |
1875 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d60d9f65 | 1876 | else |
84041b4c | 1877 | rl_crlf (); |
d60d9f65 SS |
1878 | } |
1879 | ||
84041b4c | 1880 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
d60d9f65 | 1881 | static void |
84041b4c | 1882 | insert_some_chars (string, count, col) |
d60d9f65 | 1883 | char *string; |
84041b4c | 1884 | int count, col; |
d60d9f65 | 1885 | { |
84041b4c EZ |
1886 | /* DEBUGGING */ |
1887 | if (MB_CUR_MAX == 1 || rl_byte_oriented) | |
1888 | if (count != col) | |
1889 | fprintf(stderr, "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); | |
1890 | ||
d60d9f65 | 1891 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
84041b4c | 1892 | if (_rl_term_IC) |
d60d9f65 SS |
1893 | { |
1894 | char *buffer; | |
84041b4c EZ |
1895 | |
1896 | buffer = tgoto (_rl_term_IC, 0, col); | |
d60d9f65 SS |
1897 | tputs (buffer, 1, _rl_output_character_function); |
1898 | _rl_output_some_chars (string, count); | |
1899 | } | |
1900 | else | |
1901 | { | |
1902 | register int i; | |
1903 | ||
1904 | /* If we have to turn on insert-mode, then do so. */ | |
84041b4c EZ |
1905 | if (_rl_term_im && *_rl_term_im) |
1906 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
d60d9f65 SS |
1907 | |
1908 | /* If there is a special command for inserting characters, then | |
1909 | use that first to open up the space. */ | |
84041b4c | 1910 | if (_rl_term_ic && *_rl_term_ic) |
d60d9f65 | 1911 | { |
84041b4c EZ |
1912 | for (i = col; i--; ) |
1913 | tputs (_rl_term_ic, 1, _rl_output_character_function); | |
d60d9f65 SS |
1914 | } |
1915 | ||
1916 | /* Print the text. */ | |
1917 | _rl_output_some_chars (string, count); | |
1918 | ||
1919 | /* If there is a string to turn off insert mode, we had best use | |
1920 | it now. */ | |
84041b4c EZ |
1921 | if (_rl_term_ei && *_rl_term_ei) |
1922 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
d60d9f65 | 1923 | } |
d60d9f65 SS |
1924 | } |
1925 | ||
1926 | /* Delete COUNT characters from the display line. */ | |
1927 | static void | |
1928 | delete_chars (count) | |
1929 | int count; | |
1930 | { | |
84041b4c | 1931 | if (count > _rl_screenwidth) /* XXX */ |
d60d9f65 SS |
1932 | return; |
1933 | ||
84041b4c | 1934 | if (_rl_term_DC && *_rl_term_DC) |
d60d9f65 SS |
1935 | { |
1936 | char *buffer; | |
84041b4c | 1937 | buffer = tgoto (_rl_term_DC, count, count); |
d60d9f65 SS |
1938 | tputs (buffer, count, _rl_output_character_function); |
1939 | } | |
1940 | else | |
1941 | { | |
84041b4c | 1942 | if (_rl_term_dc && *_rl_term_dc) |
d60d9f65 | 1943 | while (count--) |
84041b4c | 1944 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
d60d9f65 | 1945 | } |
d60d9f65 SS |
1946 | } |
1947 | ||
1948 | void | |
1949 | _rl_update_final () | |
1950 | { | |
1951 | int full_lines; | |
1952 | ||
1953 | full_lines = 0; | |
1954 | /* If the cursor is the only thing on an otherwise-blank last line, | |
1955 | compensate so we don't print an extra CRLF. */ | |
1956 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
1957 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) | |
1958 | { | |
1959 | _rl_vis_botlin--; | |
1960 | full_lines = 1; | |
1961 | } | |
1962 | _rl_move_vert (_rl_vis_botlin); | |
1963 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ | |
84041b4c | 1964 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
d60d9f65 SS |
1965 | { |
1966 | char *last_line; | |
84041b4c | 1967 | |
f9267e15 | 1968 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
84041b4c | 1969 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
d60d9f65 | 1970 | _rl_clear_to_eol (0); |
84041b4c | 1971 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
d60d9f65 SS |
1972 | } |
1973 | _rl_vis_botlin = 0; | |
84041b4c | 1974 | rl_crlf (); |
d60d9f65 SS |
1975 | fflush (rl_outstream); |
1976 | rl_display_fixed++; | |
1977 | } | |
1978 | ||
1979 | /* Move to the start of the current line. */ | |
1980 | static void | |
1981 | cr () | |
1982 | { | |
84041b4c | 1983 | if (_rl_term_cr) |
d60d9f65 | 1984 | { |
f9267e15 EZ |
1985 | #if defined (__MSDOS__) |
1986 | putc ('\r', rl_outstream); | |
1987 | #else | |
84041b4c | 1988 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
f9267e15 | 1989 | #endif |
d60d9f65 SS |
1990 | _rl_last_c_pos = 0; |
1991 | } | |
1992 | } | |
1993 | ||
f9267e15 EZ |
1994 | /* Redraw the last line of a multi-line prompt that may possibly contain |
1995 | terminal escape sequences. Called with the cursor at column 0 of the | |
1996 | line to draw the prompt on. */ | |
1997 | static void | |
1998 | redraw_prompt (t) | |
1999 | char *t; | |
2000 | { | |
2001 | char *oldp, *oldl, *oldlprefix; | |
84041b4c | 2002 | int oldlen, oldlast, oldplen, oldninvis; |
f9267e15 EZ |
2003 | |
2004 | /* Geez, I should make this a struct. */ | |
2005 | oldp = rl_display_prompt; | |
2006 | oldl = local_prompt; | |
2007 | oldlprefix = local_prompt_prefix; | |
84041b4c EZ |
2008 | oldlen = prompt_visible_length; |
2009 | oldplen = prompt_prefix_length; | |
2010 | oldlast = prompt_last_invisible; | |
2011 | oldninvis = prompt_invis_chars_first_line; | |
f9267e15 EZ |
2012 | |
2013 | rl_display_prompt = t; | |
84041b4c EZ |
2014 | local_prompt = expand_prompt (t, &prompt_visible_length, |
2015 | &prompt_last_invisible, | |
2016 | &prompt_invis_chars_first_line); | |
f9267e15 EZ |
2017 | local_prompt_prefix = (char *)NULL; |
2018 | rl_forced_update_display (); | |
2019 | ||
2020 | rl_display_prompt = oldp; | |
2021 | local_prompt = oldl; | |
2022 | local_prompt_prefix = oldlprefix; | |
84041b4c EZ |
2023 | prompt_visible_length = oldlen; |
2024 | prompt_prefix_length = oldplen; | |
2025 | prompt_last_invisible = oldlast; | |
2026 | prompt_invis_chars_first_line = oldninvis; | |
f9267e15 EZ |
2027 | } |
2028 | ||
d60d9f65 SS |
2029 | /* Redisplay the current line after a SIGWINCH is received. */ |
2030 | void | |
2031 | _rl_redisplay_after_sigwinch () | |
2032 | { | |
f9267e15 | 2033 | char *t; |
d60d9f65 SS |
2034 | |
2035 | /* Clear the current line and put the cursor at column 0. Make sure | |
2036 | the right thing happens if we have wrapped to a new screen line. */ | |
84041b4c | 2037 | if (_rl_term_cr) |
d60d9f65 | 2038 | { |
f9267e15 EZ |
2039 | #if defined (__MSDOS__) |
2040 | putc ('\r', rl_outstream); | |
2041 | #else | |
84041b4c | 2042 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
f9267e15 | 2043 | #endif |
d60d9f65 | 2044 | _rl_last_c_pos = 0; |
f9267e15 | 2045 | #if defined (__MSDOS__) |
84041b4c | 2046 | space_to_eol (_rl_screenwidth); |
f9267e15 EZ |
2047 | putc ('\r', rl_outstream); |
2048 | #else | |
84041b4c EZ |
2049 | if (_rl_term_clreol) |
2050 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d60d9f65 SS |
2051 | else |
2052 | { | |
84041b4c EZ |
2053 | space_to_eol (_rl_screenwidth); |
2054 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
d60d9f65 | 2055 | } |
f9267e15 | 2056 | #endif |
d60d9f65 SS |
2057 | if (_rl_last_v_pos > 0) |
2058 | _rl_move_vert (0); | |
2059 | } | |
2060 | else | |
84041b4c | 2061 | rl_crlf (); |
d60d9f65 SS |
2062 | |
2063 | /* Redraw only the last line of a multi-line prompt. */ | |
2064 | t = strrchr (rl_display_prompt, '\n'); | |
2065 | if (t) | |
f9267e15 | 2066 | redraw_prompt (++t); |
d60d9f65 SS |
2067 | else |
2068 | rl_forced_update_display (); | |
2069 | } | |
2070 | ||
2071 | void | |
2072 | _rl_clean_up_for_exit () | |
2073 | { | |
2074 | if (readline_echoing_p) | |
2075 | { | |
2076 | _rl_move_vert (_rl_vis_botlin); | |
2077 | _rl_vis_botlin = 0; | |
2078 | fflush (rl_outstream); | |
c862e87b | 2079 | rl_restart_output (1, 0); |
d60d9f65 SS |
2080 | } |
2081 | } | |
c862e87b JM |
2082 | |
2083 | void | |
2084 | _rl_erase_entire_line () | |
2085 | { | |
2086 | cr (); | |
2087 | _rl_clear_to_eol (0); | |
2088 | cr (); | |
2089 | fflush (rl_outstream); | |
2090 | } | |
f9267e15 EZ |
2091 | |
2092 | /* return the `current display line' of the cursor -- the number of lines to | |
2093 | move up to get to the first screen line of the current readline line. */ | |
2094 | int | |
2095 | _rl_current_display_line () | |
2096 | { | |
2097 | int ret, nleft; | |
2098 | ||
2099 | /* Find out whether or not there might be invisible characters in the | |
2100 | editing buffer. */ | |
2101 | if (rl_display_prompt == rl_prompt) | |
84041b4c | 2102 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
f9267e15 | 2103 | else |
84041b4c | 2104 | nleft = _rl_last_c_pos - _rl_screenwidth; |
f9267e15 EZ |
2105 | |
2106 | if (nleft > 0) | |
84041b4c | 2107 | ret = 1 + nleft / _rl_screenwidth; |
f9267e15 EZ |
2108 | else |
2109 | ret = 0; | |
2110 | ||
2111 | return ret; | |
2112 | } | |
84041b4c EZ |
2113 | |
2114 | #if defined (HANDLE_MULTIBYTE) | |
2115 | /* Calculate the number of screen columns occupied by STR from START to END. | |
2116 | In the case of multibyte characters with stateful encoding, we have to | |
2117 | scan from the beginning of the string to take the state into account. */ | |
2118 | static int | |
2119 | _rl_col_width (str, start, end) | |
2120 | char *str; | |
2121 | int start, end; | |
2122 | { | |
2123 | wchar_t wc; | |
2124 | mbstate_t ps = {0}; | |
2125 | int tmp, point, width, max; | |
2126 | ||
2127 | if (end <= start) | |
2128 | return 0; | |
2129 | ||
2130 | point = 0; | |
2131 | max = end; | |
2132 | ||
2133 | while (point < start) | |
2134 | { | |
2135 | tmp = mbrlen (str + point, max, &ps); | |
2136 | if ((size_t)tmp == (size_t)-1 || (size_t)tmp == (size_t)-2) | |
2137 | { | |
2138 | /* In this case, the bytes are invalid or too short to compose a | |
2139 | multibyte character, so we assume that the first byte represents | |
2140 | a single character. */ | |
2141 | point++; | |
2142 | max--; | |
2143 | ||
2144 | /* Clear the state of the byte sequence, because in this case the | |
2145 | effect of mbstate is undefined. */ | |
2146 | memset (&ps, 0, sizeof (mbstate_t)); | |
2147 | } | |
2148 | else if (tmp == 0) | |
2149 | break; /* Found '\0' */ | |
2150 | else | |
2151 | { | |
2152 | point += tmp; | |
2153 | max -= tmp; | |
2154 | } | |
2155 | } | |
2156 | ||
2157 | /* If START is not a byte that starts a character, then POINT will be | |
2158 | greater than START. In this case, assume that (POINT - START) gives | |
2159 | a byte count that is the number of columns of difference. */ | |
2160 | width = point - start; | |
2161 | ||
2162 | while (point < end) | |
2163 | { | |
2164 | tmp = mbrtowc (&wc, str + point, max, &ps); | |
2165 | if ((size_t)tmp == (size_t)-1 || (size_t)tmp == (size_t)-2) | |
2166 | { | |
2167 | /* In this case, the bytes are invalid or too short to compose a | |
2168 | multibyte character, so we assume that the first byte represents | |
2169 | a single character. */ | |
2170 | point++; | |
2171 | max--; | |
2172 | ||
2173 | /* and assume that the byte occupies a single column. */ | |
2174 | width++; | |
2175 | ||
2176 | /* Clear the state of the byte sequence, because in this case the | |
2177 | effect of mbstate is undefined. */ | |
2178 | memset (&ps, 0, sizeof (mbstate_t)); | |
2179 | } | |
2180 | else if (tmp == 0) | |
2181 | break; /* Found '\0' */ | |
2182 | else | |
2183 | { | |
2184 | point += tmp; | |
2185 | max -= tmp; | |
2186 | tmp = wcwidth(wc); | |
2187 | width += (tmp >= 0) ? tmp : 1; | |
2188 | } | |
2189 | } | |
2190 | ||
2191 | width += point - end; | |
2192 | ||
2193 | return width; | |
2194 | } | |
2195 | #endif /* HANDLE_MULTIBYTE */ | |
2196 |