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726f6388 JA |
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 | |
bb70624e | 10 | as published by the Free Software Foundation; either version 2, or |
726f6388 JA |
11 | (at your option) any later version. |
12 | ||
13 | The GNU Readline Library is distributed in the hope that it will be | |
14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | The GNU General Public License is often shipped with GNU software, and | |
19 | is generally kept in a file called COPYING or LICENSE. If you do not | |
20 | have a copy of the license, write to the Free Software Foundation, | |
bb70624e | 21 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 JA |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
ccc6cda3 | 25 | # include <config.h> |
726f6388 JA |
26 | #endif |
27 | ||
726f6388 JA |
28 | #include <sys/types.h> |
29 | ||
30 | #if defined (HAVE_UNISTD_H) | |
31 | # include <unistd.h> | |
32 | #endif /* HAVE_UNISTD_H */ | |
33 | ||
d166f048 JA |
34 | #include "posixstat.h" |
35 | ||
726f6388 JA |
36 | #if defined (HAVE_STDLIB_H) |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
d166f048 JA |
42 | #include <stdio.h> |
43 | ||
726f6388 JA |
44 | /* System-specific feature definitions and include files. */ |
45 | #include "rldefs.h" | |
46 | ||
ccc6cda3 JA |
47 | /* Termcap library stuff. */ |
48 | #include "tcap.h" | |
49 | ||
726f6388 JA |
50 | /* Some standard library routines. */ |
51 | #include "readline.h" | |
52 | #include "history.h" | |
53 | ||
bb70624e JA |
54 | #include "rlprivate.h" |
55 | #include "xmalloc.h" | |
56 | ||
726f6388 JA |
57 | #if !defined (strchr) && !defined (__STDC__) |
58 | extern char *strchr (), *strrchr (); | |
59 | #endif /* !strchr && !__STDC__ */ | |
60 | ||
bb70624e | 61 | #if defined (HACK_TERMCAP_MOTION) |
28ef6c31 | 62 | extern char *_rl_term_forward_char; |
cce855bc | 63 | #endif |
726f6388 | 64 | |
bb70624e JA |
65 | static void update_line __P((char *, char *, int, int, int, int)); |
66 | static void space_to_eol __P((int)); | |
67 | static void delete_chars __P((int)); | |
68 | static void insert_some_chars __P((char *, int)); | |
69 | static void cr __P((void)); | |
ccc6cda3 JA |
70 | |
71 | static int *inv_lbreaks, *vis_lbreaks; | |
bb70624e | 72 | static int inv_lbsize, vis_lbsize; |
726f6388 JA |
73 | |
74 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
75 | by backing up or outputting a carriage return and moving forward. */ | |
76 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
77 | ||
78 | /* **************************************************************** */ | |
79 | /* */ | |
80 | /* Display stuff */ | |
81 | /* */ | |
82 | /* **************************************************************** */ | |
83 | ||
84 | /* This is the stuff that is hard for me. I never seem to write good | |
85 | display routines in C. Let's see how I do this time. */ | |
86 | ||
87 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
88 | the problems of input lines longer than the screen width. | |
89 | ||
90 | update_line and the code that calls it makes a multiple line, | |
91 | automatically wrapping line update. Careful attention needs | |
92 | to be paid to the vertical position variables. */ | |
93 | ||
94 | /* Keep two buffers; one which reflects the current contents of the | |
95 | screen, and the other to draw what we think the new contents should | |
96 | be. Then compare the buffers, and make whatever changes to the | |
97 | screen itself that we should. Finally, make the buffer that we | |
98 | just drew into be the one which reflects the current contents of the | |
99 | screen, and place the cursor where it belongs. | |
100 | ||
101 | Commands that want to can fix the display themselves, and then let | |
102 | this function know that the display has been fixed by setting the | |
103 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
104 | ||
ccc6cda3 | 105 | /* Application-specific redisplay function. */ |
28ef6c31 | 106 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
ccc6cda3 | 107 | |
726f6388 JA |
108 | /* Global variables declared here. */ |
109 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
110 | int rl_display_fixed = 0; | |
111 | ||
ccc6cda3 JA |
112 | int _rl_suppress_redisplay = 0; |
113 | ||
726f6388 JA |
114 | /* The stuff that gets printed out before the actual text of the line. |
115 | This is usually pointing to rl_prompt. */ | |
116 | char *rl_display_prompt = (char *)NULL; | |
117 | ||
118 | /* Pseudo-global variables declared here. */ | |
119 | /* The visible cursor position. If you print some text, adjust this. */ | |
120 | int _rl_last_c_pos = 0; | |
121 | int _rl_last_v_pos = 0; | |
122 | ||
123 | /* Number of lines currently on screen minus 1. */ | |
124 | int _rl_vis_botlin = 0; | |
125 | ||
126 | /* Variables used only in this file. */ | |
127 | /* The last left edge of text that was displayed. This is used when | |
128 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
ccc6cda3 | 129 | static int last_lmargin; |
726f6388 JA |
130 | |
131 | /* The line display buffers. One is the line currently displayed on | |
132 | the screen. The other is the line about to be displayed. */ | |
133 | static char *visible_line = (char *)NULL; | |
134 | static char *invisible_line = (char *)NULL; | |
135 | ||
136 | /* A buffer for `modeline' messages. */ | |
137 | static char msg_buf[128]; | |
138 | ||
139 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
ccc6cda3 | 140 | static int forced_display; |
726f6388 JA |
141 | |
142 | /* Default and initial buffer size. Can grow. */ | |
143 | static int line_size = 1024; | |
144 | ||
28ef6c31 JA |
145 | /* Variables to keep track of the expanded prompt string, which may |
146 | include invisible characters. */ | |
147 | ||
726f6388 | 148 | static char *local_prompt, *local_prompt_prefix; |
28ef6c31 | 149 | static int prompt_visible_length, prompt_prefix_length; |
726f6388 JA |
150 | |
151 | /* The number of invisible characters in the line currently being | |
152 | displayed on the screen. */ | |
ccc6cda3 JA |
153 | static int visible_wrap_offset; |
154 | ||
28ef6c31 JA |
155 | /* The number of invisible characters in the prompt string. Static so it |
156 | can be shared between rl_redisplay and update_line */ | |
ccc6cda3 JA |
157 | static int wrap_offset; |
158 | ||
28ef6c31 JA |
159 | /* The index of the last invisible character in the prompt string. */ |
160 | static int prompt_last_invisible; | |
726f6388 JA |
161 | |
162 | /* The length (buffer offset) of the first line of the last (possibly | |
163 | multi-line) buffer displayed on the screen. */ | |
ccc6cda3 | 164 | static int visible_first_line_len; |
726f6388 | 165 | |
28ef6c31 JA |
166 | /* Number of invisible characters on the first physical line of the prompt. |
167 | Only valid when the number of physical characters in the prompt exceeds | |
168 | (or is equal to) _rl_screenwidth. */ | |
169 | static int prompt_invis_chars_first_line; | |
170 | ||
171 | static int prompt_last_screen_line; | |
172 | ||
726f6388 JA |
173 | /* Expand the prompt string S and return the number of visible |
174 | characters in *LP, if LP is not null. This is currently more-or-less | |
ccc6cda3 | 175 | a placeholder for expansion. LIP, if non-null is a place to store the |
28ef6c31 JA |
176 | index of the last invisible character in the returned string. NIFLP, |
177 | if non-zero, is a place to store the number of invisible characters in | |
178 | the first prompt line. */ | |
726f6388 JA |
179 | |
180 | /* Current implementation: | |
181 | \001 (^A) start non-visible characters | |
182 | \002 (^B) end non-visible characters | |
183 | all characters except \001 and \002 (following a \001) are copied to | |
184 | the returned string; all characters except those between \001 and | |
185 | \002 are assumed to be `visible'. */ | |
186 | ||
187 | static char * | |
28ef6c31 | 188 | expand_prompt (pmt, lp, lip, niflp) |
726f6388 | 189 | char *pmt; |
28ef6c31 | 190 | int *lp, *lip, *niflp; |
726f6388 JA |
191 | { |
192 | char *r, *ret, *p; | |
28ef6c31 | 193 | int l, rl, last, ignoring, ninvis, invfl; |
726f6388 JA |
194 | |
195 | /* Short-circuit if we can. */ | |
196 | if (strchr (pmt, RL_PROMPT_START_IGNORE) == 0) | |
197 | { | |
198 | r = savestring (pmt); | |
199 | if (lp) | |
200 | *lp = strlen (r); | |
201 | return r; | |
202 | } | |
203 | ||
ccc6cda3 | 204 | l = strlen (pmt); |
726f6388 | 205 | r = ret = xmalloc (l + 1); |
28ef6c31 JA |
206 | |
207 | invfl = 0; /* invisible chars in first line of prompt */ | |
208 | ||
209 | for (rl = ignoring = last = ninvis = 0, p = pmt; p && *p; p++) | |
726f6388 JA |
210 | { |
211 | /* This code strips the invisible character string markers | |
212 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
213 | if (*p == RL_PROMPT_START_IGNORE) | |
214 | { | |
215 | ignoring++; | |
216 | continue; | |
217 | } | |
218 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
219 | { | |
220 | ignoring = 0; | |
ccc6cda3 | 221 | last = r - ret - 1; |
726f6388 JA |
222 | continue; |
223 | } | |
224 | else | |
225 | { | |
226 | *r++ = *p; | |
227 | if (!ignoring) | |
228 | rl++; | |
28ef6c31 JA |
229 | else |
230 | ninvis++; | |
231 | if (rl == _rl_screenwidth) | |
232 | invfl = ninvis; | |
726f6388 JA |
233 | } |
234 | } | |
235 | ||
28ef6c31 JA |
236 | if (rl < _rl_screenwidth) |
237 | invfl = ninvis; | |
238 | ||
726f6388 JA |
239 | *r = '\0'; |
240 | if (lp) | |
241 | *lp = rl; | |
ccc6cda3 JA |
242 | if (lip) |
243 | *lip = last; | |
28ef6c31 JA |
244 | if (niflp) |
245 | *niflp = invfl; | |
726f6388 JA |
246 | return ret; |
247 | } | |
248 | ||
bb70624e JA |
249 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
250 | PMT and return the rest of PMT. */ | |
251 | char * | |
252 | _rl_strip_prompt (pmt) | |
253 | char *pmt; | |
254 | { | |
255 | char *ret; | |
256 | ||
28ef6c31 | 257 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL); |
bb70624e JA |
258 | return ret; |
259 | } | |
260 | ||
726f6388 JA |
261 | /* |
262 | * Expand the prompt string into the various display components, if | |
263 | * necessary. | |
264 | * | |
265 | * local_prompt = expanded last line of string in rl_display_prompt | |
266 | * (portion after the final newline) | |
267 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
268 | * expanded via expand_prompt | |
28ef6c31 JA |
269 | * prompt_visible_length = number of visible characters in local_prompt |
270 | * prompt_prefix_length = number of visible characters in local_prompt_prefix | |
726f6388 JA |
271 | * |
272 | * This function is called once per call to readline(). It may also be | |
273 | * called arbitrarily to expand the primary prompt. | |
274 | * | |
275 | * The return value is the number of visible characters on the last line | |
276 | * of the (possibly multi-line) prompt. | |
277 | */ | |
278 | int | |
279 | rl_expand_prompt (prompt) | |
280 | char *prompt; | |
281 | { | |
282 | char *p, *t; | |
283 | int c; | |
284 | ||
285 | /* Clear out any saved values. */ | |
28ef6c31 JA |
286 | FREE (local_prompt); |
287 | FREE (local_prompt_prefix); | |
288 | ||
726f6388 | 289 | local_prompt = local_prompt_prefix = (char *)0; |
28ef6c31 | 290 | prompt_last_invisible = prompt_visible_length = 0; |
726f6388 | 291 | |
ccc6cda3 | 292 | if (prompt == 0 || *prompt == 0) |
726f6388 JA |
293 | return (0); |
294 | ||
295 | p = strrchr (prompt, '\n'); | |
296 | if (!p) | |
297 | { | |
28ef6c31 JA |
298 | /* The prompt is only one logical line, though it might wrap. */ |
299 | local_prompt = expand_prompt (prompt, &prompt_visible_length, | |
300 | &prompt_last_invisible, | |
301 | &prompt_invis_chars_first_line); | |
726f6388 | 302 | local_prompt_prefix = (char *)0; |
28ef6c31 | 303 | return (prompt_visible_length); |
726f6388 JA |
304 | } |
305 | else | |
306 | { | |
307 | /* The prompt spans multiple lines. */ | |
308 | t = ++p; | |
28ef6c31 JA |
309 | local_prompt = expand_prompt (p, &prompt_visible_length, |
310 | &prompt_last_invisible, | |
311 | &prompt_invis_chars_first_line); | |
726f6388 JA |
312 | c = *t; *t = '\0'; |
313 | /* The portion of the prompt string up to and including the | |
314 | final newline is now null-terminated. */ | |
28ef6c31 JA |
315 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
316 | (int *)NULL, | |
317 | &prompt_invis_chars_first_line); | |
726f6388 | 318 | *t = c; |
28ef6c31 | 319 | return (prompt_prefix_length); |
726f6388 JA |
320 | } |
321 | } | |
322 | ||
bb70624e JA |
323 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
324 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE | |
325 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is | |
326 | increased. If the lines have already been allocated, this ensures that | |
327 | they can hold at least MINSIZE characters. */ | |
328 | static void | |
329 | init_line_structures (minsize) | |
330 | int minsize; | |
331 | { | |
332 | register int n; | |
333 | ||
334 | if (invisible_line == 0) /* initialize it */ | |
335 | { | |
336 | if (line_size < minsize) | |
337 | line_size = minsize; | |
338 | visible_line = xmalloc (line_size); | |
339 | invisible_line = xmalloc (line_size); | |
340 | } | |
341 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ | |
342 | { | |
343 | line_size *= 2; | |
344 | if (line_size < minsize) | |
345 | line_size = minsize; | |
346 | visible_line = xrealloc (visible_line, line_size); | |
347 | invisible_line = xrealloc (invisible_line, line_size); | |
348 | } | |
349 | ||
350 | for (n = minsize; n < line_size; n++) | |
351 | { | |
352 | visible_line[n] = 0; | |
353 | invisible_line[n] = 1; | |
354 | } | |
355 | ||
356 | if (vis_lbreaks == 0) | |
357 | { | |
358 | /* should be enough. */ | |
359 | inv_lbsize = vis_lbsize = 256; | |
360 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); | |
361 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); | |
362 | inv_lbreaks[0] = vis_lbreaks[0] = 0; | |
363 | } | |
364 | } | |
365 | ||
726f6388 JA |
366 | /* Basic redisplay algorithm. */ |
367 | void | |
368 | rl_redisplay () | |
369 | { | |
ccc6cda3 JA |
370 | register int in, out, c, linenum, cursor_linenum; |
371 | register char *line; | |
372 | int c_pos, inv_botlin, lb_botlin, lb_linenum; | |
d166f048 | 373 | int newlines, lpos, temp; |
726f6388 JA |
374 | char *prompt_this_line; |
375 | ||
376 | if (!readline_echoing_p) | |
377 | return; | |
378 | ||
379 | if (!rl_display_prompt) | |
380 | rl_display_prompt = ""; | |
381 | ||
ccc6cda3 | 382 | if (invisible_line == 0) |
726f6388 | 383 | { |
bb70624e | 384 | init_line_structures (0); |
726f6388 JA |
385 | rl_on_new_line (); |
386 | } | |
387 | ||
388 | /* Draw the line into the buffer. */ | |
389 | c_pos = -1; | |
390 | ||
ccc6cda3 JA |
391 | line = invisible_line; |
392 | out = inv_botlin = 0; | |
393 | ||
726f6388 JA |
394 | /* Mark the line as modified or not. We only do this for history |
395 | lines. */ | |
726f6388 JA |
396 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
397 | { | |
398 | line[out++] = '*'; | |
399 | line[out] = '\0'; | |
400 | } | |
401 | ||
402 | /* If someone thought that the redisplay was handled, but the currently | |
403 | visible line has a different modification state than the one about | |
404 | to become visible, then correct the caller's misconception. */ | |
405 | if (visible_line[0] != invisible_line[0]) | |
406 | rl_display_fixed = 0; | |
407 | ||
408 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
409 | one passed to readline()), use the values we have already expanded. | |
410 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
411 | number of non-visible characters in the prompt string. */ | |
ccc6cda3 | 412 | if (rl_display_prompt == rl_prompt || local_prompt) |
726f6388 JA |
413 | { |
414 | int local_len = local_prompt ? strlen (local_prompt) : 0; | |
415 | if (local_prompt_prefix && forced_display) | |
416 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
417 | ||
418 | if (local_len > 0) | |
ccc6cda3 | 419 | { |
b72432fd JA |
420 | temp = local_len + out + 2; |
421 | if (temp >= line_size) | |
422 | { | |
423 | line_size = (temp + 1024) - (temp % 1024); | |
424 | visible_line = xrealloc (visible_line, line_size); | |
425 | line = invisible_line = xrealloc (invisible_line, line_size); | |
426 | } | |
ccc6cda3 JA |
427 | strncpy (line + out, local_prompt, local_len); |
428 | out += local_len; | |
429 | } | |
726f6388 | 430 | line[out] = '\0'; |
28ef6c31 | 431 | wrap_offset = local_len - prompt_visible_length; |
726f6388 JA |
432 | } |
433 | else | |
434 | { | |
435 | int pmtlen; | |
436 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
437 | if (!prompt_this_line) | |
438 | prompt_this_line = rl_display_prompt; | |
439 | else | |
440 | { | |
441 | prompt_this_line++; | |
bb70624e | 442 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
726f6388 | 443 | if (forced_display) |
ccc6cda3 | 444 | { |
bb70624e | 445 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
ccc6cda3 JA |
446 | /* Make sure we are at column zero even after a newline, |
447 | regardless of the state of terminal output processing. */ | |
bb70624e | 448 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
ccc6cda3 JA |
449 | cr (); |
450 | } | |
726f6388 JA |
451 | } |
452 | ||
453 | pmtlen = strlen (prompt_this_line); | |
b72432fd JA |
454 | temp = pmtlen + out + 2; |
455 | if (temp >= line_size) | |
456 | { | |
457 | line_size = (temp + 1024) - (temp % 1024); | |
458 | visible_line = xrealloc (visible_line, line_size); | |
459 | line = invisible_line = xrealloc (invisible_line, line_size); | |
460 | } | |
726f6388 JA |
461 | strncpy (line + out, prompt_this_line, pmtlen); |
462 | out += pmtlen; | |
463 | line[out] = '\0'; | |
28ef6c31 | 464 | wrap_offset = prompt_invis_chars_first_line = 0; |
726f6388 JA |
465 | } |
466 | ||
bb70624e JA |
467 | #define CHECK_INV_LBREAKS() \ |
468 | do { \ | |
469 | if (newlines >= (inv_lbsize - 2)) \ | |
470 | { \ | |
471 | inv_lbsize *= 2; \ | |
472 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
473 | } \ | |
474 | } while (0) | |
475 | ||
ccc6cda3 JA |
476 | #define CHECK_LPOS() \ |
477 | do { \ | |
b72432fd | 478 | lpos++; \ |
28ef6c31 | 479 | if (lpos >= _rl_screenwidth) \ |
b72432fd | 480 | { \ |
bb70624e JA |
481 | if (newlines >= (inv_lbsize - 2)) \ |
482 | { \ | |
483 | inv_lbsize *= 2; \ | |
484 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ | |
485 | } \ | |
b72432fd JA |
486 | inv_lbreaks[++newlines] = out; \ |
487 | lpos = 0; \ | |
488 | } \ | |
ccc6cda3 JA |
489 | } while (0) |
490 | ||
491 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
492 | inv_lbreaks[newlines = 0] = 0; | |
d166f048 JA |
493 | lpos = out - wrap_offset; |
494 | ||
28ef6c31 JA |
495 | /* prompt_invis_chars_first_line is the number of invisible characters in |
496 | the first physical line of the prompt. | |
497 | wrap_offset - prompt_invis_chars_first_line is the number of invis | |
498 | chars on the second line. */ | |
499 | ||
500 | /* what if lpos is already >= _rl_screenwidth before we start drawing the | |
d166f048 | 501 | contents of the command line? */ |
28ef6c31 | 502 | while (lpos >= _rl_screenwidth) |
d166f048 | 503 | { |
28ef6c31 JA |
504 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
505 | invisible characters that is longer than the screen width. The | |
506 | prompt_invis_chars_first_line variable could be made into an array | |
507 | saying how many invisible characters there are per line, but that's | |
508 | probably too much work for the benefit gained. How many people have | |
509 | prompts that exceed two physical lines? */ | |
510 | temp = ((newlines + 1) * _rl_screenwidth) + | |
511 | ((newlines == 0) ? prompt_invis_chars_first_line : 0) + | |
512 | ((newlines == 1) ? wrap_offset : 0); | |
bb70624e | 513 | |
d166f048 | 514 | inv_lbreaks[++newlines] = temp; |
28ef6c31 | 515 | lpos -= _rl_screenwidth; |
d166f048 | 516 | } |
ccc6cda3 | 517 | |
28ef6c31 JA |
518 | prompt_last_screen_line = newlines; |
519 | ||
520 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping | |
521 | track of where the cursor is (c_pos), the number of the line containing | |
522 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). | |
523 | It maintains an array of line breaks for display (inv_lbreaks). | |
524 | This handles expanding tabs for display and displaying meta characters. */ | |
d166f048 JA |
525 | lb_linenum = 0; |
526 | for (in = 0; in < rl_end; in++) | |
726f6388 JA |
527 | { |
528 | c = (unsigned char)rl_line_buffer[in]; | |
529 | ||
530 | if (out + 8 >= line_size) /* XXX - 8 for \t */ | |
531 | { | |
532 | line_size *= 2; | |
533 | visible_line = xrealloc (visible_line, line_size); | |
534 | invisible_line = xrealloc (invisible_line, line_size); | |
535 | line = invisible_line; | |
536 | } | |
537 | ||
538 | if (in == rl_point) | |
ccc6cda3 JA |
539 | { |
540 | c_pos = out; | |
541 | lb_linenum = newlines; | |
542 | } | |
726f6388 JA |
543 | |
544 | if (META_CHAR (c)) | |
545 | { | |
546 | if (_rl_output_meta_chars == 0) | |
547 | { | |
548 | sprintf (line + out, "\\%o", c); | |
ccc6cda3 | 549 | |
28ef6c31 | 550 | if (lpos + 4 >= _rl_screenwidth) |
ccc6cda3 | 551 | { |
28ef6c31 | 552 | temp = _rl_screenwidth - lpos; |
bb70624e | 553 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
554 | inv_lbreaks[++newlines] = out + temp; |
555 | lpos = 4 - temp; | |
556 | } | |
557 | else | |
558 | lpos += 4; | |
559 | ||
726f6388 JA |
560 | out += 4; |
561 | } | |
562 | else | |
ccc6cda3 JA |
563 | { |
564 | line[out++] = c; | |
565 | CHECK_LPOS(); | |
566 | } | |
726f6388 JA |
567 | } |
568 | #if defined (DISPLAY_TABS) | |
569 | else if (c == '\t') | |
570 | { | |
28ef6c31 | 571 | register int newout; |
b72432fd JA |
572 | |
573 | #if 0 | |
ccc6cda3 | 574 | newout = (out | (int)7) + 1; |
b72432fd JA |
575 | #else |
576 | newout = out + 8 - lpos % 8; | |
577 | #endif | |
ccc6cda3 | 578 | temp = newout - out; |
28ef6c31 | 579 | if (lpos + temp >= _rl_screenwidth) |
ccc6cda3 JA |
580 | { |
581 | register int temp2; | |
28ef6c31 | 582 | temp2 = _rl_screenwidth - lpos; |
bb70624e | 583 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
584 | inv_lbreaks[++newlines] = out + temp2; |
585 | lpos = temp - temp2; | |
586 | while (out < newout) | |
587 | line[out++] = ' '; | |
588 | } | |
589 | else | |
590 | { | |
591 | while (out < newout) | |
592 | line[out++] = ' '; | |
593 | lpos += temp; | |
594 | } | |
726f6388 JA |
595 | } |
596 | #endif | |
28ef6c31 | 597 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
b72432fd JA |
598 | { |
599 | line[out++] = '\0'; /* XXX - sentinel */ | |
bb70624e | 600 | CHECK_INV_LBREAKS (); |
b72432fd JA |
601 | inv_lbreaks[++newlines] = out; |
602 | lpos = 0; | |
603 | } | |
ccc6cda3 | 604 | else if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
605 | { |
606 | line[out++] = '^'; | |
ccc6cda3 JA |
607 | CHECK_LPOS(); |
608 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
609 | CHECK_LPOS(); | |
726f6388 | 610 | } |
ccc6cda3 | 611 | else |
726f6388 | 612 | { |
ccc6cda3 JA |
613 | line[out++] = c; |
614 | CHECK_LPOS(); | |
726f6388 | 615 | } |
726f6388 JA |
616 | } |
617 | line[out] = '\0'; | |
618 | if (c_pos < 0) | |
ccc6cda3 JA |
619 | { |
620 | c_pos = out; | |
621 | lb_linenum = newlines; | |
622 | } | |
623 | ||
624 | inv_botlin = lb_botlin = newlines; | |
bb70624e | 625 | CHECK_INV_LBREAKS (); |
ccc6cda3 JA |
626 | inv_lbreaks[newlines+1] = out; |
627 | cursor_linenum = lb_linenum; | |
726f6388 | 628 | |
28ef6c31 JA |
629 | /* C_POS == position in buffer where cursor should be placed. |
630 | CURSOR_LINENUM == line number where the cursor should be placed. */ | |
726f6388 JA |
631 | |
632 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
633 | line buffers are really multiple lines, which would wrap every | |
634 | (screenwidth - 1) characters. Go through each in turn, finding | |
635 | the changed region and updating it. The line order is top to bottom. */ | |
636 | ||
637 | /* If we can move the cursor up and down, then use multiple lines, | |
638 | otherwise, let long lines display in a single terminal line, and | |
639 | horizontally scroll it. */ | |
640 | ||
28ef6c31 | 641 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
726f6388 | 642 | { |
ccc6cda3 | 643 | int nleft, pos, changed_screen_line; |
726f6388 JA |
644 | |
645 | if (!rl_display_fixed || forced_display) | |
646 | { | |
647 | forced_display = 0; | |
648 | ||
649 | /* If we have more than a screenful of material to display, then | |
650 | only display a screenful. We should display the last screen, | |
ccc6cda3 | 651 | not the first. */ |
28ef6c31 JA |
652 | if (out >= _rl_screenchars) |
653 | out = _rl_screenchars - 1; | |
726f6388 JA |
654 | |
655 | /* The first line is at character position 0 in the buffer. The | |
ccc6cda3 JA |
656 | second and subsequent lines start at inv_lbreaks[N], offset by |
657 | OFFSET (which has already been calculated above). */ | |
726f6388 JA |
658 | |
659 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
ccc6cda3 JA |
660 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
661 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
662 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
726f6388 | 663 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
ccc6cda3 | 664 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
726f6388 JA |
665 | |
666 | /* For each line in the buffer, do the updating display. */ | |
667 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
668 | { | |
669 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, | |
ccc6cda3 | 670 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
726f6388 JA |
671 | |
672 | /* If this is the line with the prompt, we might need to | |
673 | compensate for invisible characters in the new line. Do | |
674 | this only if there is not more than one new line (which | |
675 | implies that we completely overwrite the old visible line) | |
ccc6cda3 JA |
676 | and the new line is shorter than the old. Make sure we are |
677 | at the end of the new line before clearing. */ | |
726f6388 | 678 | if (linenum == 0 && |
ccc6cda3 | 679 | inv_botlin == 0 && _rl_last_c_pos == out && |
726f6388 JA |
680 | (wrap_offset > visible_wrap_offset) && |
681 | (_rl_last_c_pos < visible_first_line_len)) | |
682 | { | |
28ef6c31 | 683 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; |
726f6388 | 684 | if (nleft) |
d166f048 | 685 | _rl_clear_to_eol (nleft); |
726f6388 JA |
686 | } |
687 | ||
688 | /* Since the new first line is now visible, save its length. */ | |
689 | if (linenum == 0) | |
ccc6cda3 | 690 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
726f6388 JA |
691 | } |
692 | ||
693 | /* We may have deleted some lines. If so, clear the left over | |
694 | blank ones at the bottom out. */ | |
695 | if (_rl_vis_botlin > inv_botlin) | |
696 | { | |
697 | char *tt; | |
698 | for (; linenum <= _rl_vis_botlin; linenum++) | |
699 | { | |
700 | tt = VIS_CHARS (linenum); | |
701 | _rl_move_vert (linenum); | |
702 | _rl_move_cursor_relative (0, tt); | |
d166f048 | 703 | _rl_clear_to_eol |
28ef6c31 | 704 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
726f6388 JA |
705 | } |
706 | } | |
707 | _rl_vis_botlin = inv_botlin; | |
708 | ||
726f6388 JA |
709 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
710 | different screen line during this redisplay. */ | |
711 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
712 | if (changed_screen_line) | |
713 | { | |
714 | _rl_move_vert (cursor_linenum); | |
28ef6c31 | 715 | /* If we moved up to the line with the prompt using _rl_term_up, |
b72432fd JA |
716 | the physical cursor position on the screen stays the same, |
717 | but the buffer position needs to be adjusted to account | |
718 | for invisible characters. */ | |
726f6388 | 719 | if (cursor_linenum == 0 && wrap_offset) |
b72432fd | 720 | _rl_last_c_pos += wrap_offset; |
726f6388 JA |
721 | } |
722 | ||
723 | /* We have to reprint the prompt if it contains invisible | |
724 | characters, since it's not generally OK to just reprint | |
ccc6cda3 JA |
725 | the characters from the current cursor position. But we |
726 | only need to reprint it if the cursor is before the last | |
727 | invisible character in the prompt string. */ | |
28ef6c31 | 728 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 729 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
28ef6c31 | 730 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
726f6388 | 731 | { |
bb70624e JA |
732 | #if defined (__MSDOS__) |
733 | putc ('\r', rl_outstream); | |
734 | #else | |
28ef6c31 JA |
735 | if (_rl_term_cr) |
736 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
bb70624e | 737 | #endif |
726f6388 JA |
738 | _rl_output_some_chars (local_prompt, nleft); |
739 | _rl_last_c_pos = nleft; | |
740 | } | |
741 | ||
742 | /* Where on that line? And where does that line start | |
743 | in the buffer? */ | |
ccc6cda3 | 744 | pos = inv_lbreaks[cursor_linenum]; |
726f6388 JA |
745 | /* nleft == number of characters in the line buffer between the |
746 | start of the line and the cursor position. */ | |
747 | nleft = c_pos - pos; | |
748 | ||
ccc6cda3 | 749 | /* Since _rl_backspace() doesn't know about invisible characters in the |
726f6388 | 750 | prompt, and there's no good way to tell it, we compensate for |
ccc6cda3 | 751 | those characters here and call _rl_backspace() directly. */ |
726f6388 JA |
752 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
753 | { | |
ccc6cda3 | 754 | _rl_backspace (_rl_last_c_pos - nleft); |
726f6388 JA |
755 | _rl_last_c_pos = nleft; |
756 | } | |
757 | ||
758 | if (nleft != _rl_last_c_pos) | |
759 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
760 | } | |
761 | } | |
762 | else /* Do horizontal scrolling. */ | |
763 | { | |
764 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
765 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
766 | ||
767 | /* Always at top line. */ | |
768 | _rl_last_v_pos = 0; | |
769 | ||
770 | /* Compute where in the buffer the displayed line should start. This | |
771 | will be LMARGIN. */ | |
772 | ||
773 | /* The number of characters that will be displayed before the cursor. */ | |
774 | ndisp = c_pos - wrap_offset; | |
28ef6c31 | 775 | nleft = prompt_visible_length + wrap_offset; |
726f6388 | 776 | /* Where the new cursor position will be on the screen. This can be |
b72432fd | 777 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
726f6388 | 778 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
28ef6c31 | 779 | t = _rl_screenwidth / 3; |
726f6388 JA |
780 | |
781 | /* If the number of characters had already exceeded the screenwidth, | |
b72432fd | 782 | last_lmargin will be > 0. */ |
726f6388 JA |
783 | |
784 | /* If the number of characters to be displayed is more than the screen | |
b72432fd JA |
785 | width, compute the starting offset so that the cursor is about |
786 | two-thirds of the way across the screen. */ | |
28ef6c31 | 787 | if (phys_c_pos > _rl_screenwidth - 2) |
726f6388 JA |
788 | { |
789 | lmargin = c_pos - (2 * t); | |
790 | if (lmargin < 0) | |
791 | lmargin = 0; | |
792 | /* If the left margin would be in the middle of a prompt with | |
793 | invisible characters, don't display the prompt at all. */ | |
794 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
795 | lmargin = nleft; | |
796 | } | |
28ef6c31 | 797 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
b72432fd | 798 | lmargin = 0; |
726f6388 JA |
799 | else if (phys_c_pos < 1) |
800 | { | |
801 | /* If we are moving back towards the beginning of the line and | |
802 | the last margin is no longer correct, compute a new one. */ | |
803 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ | |
804 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
805 | lmargin = nleft; | |
806 | } | |
807 | else | |
b72432fd | 808 | lmargin = last_lmargin; |
726f6388 JA |
809 | |
810 | /* If the first character on the screen isn't the first character | |
811 | in the display line, indicate this with a special character. */ | |
812 | if (lmargin > 0) | |
813 | line[lmargin] = '<'; | |
814 | ||
815 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
b72432fd JA |
816 | the whole line, indicate that with a special character at the |
817 | right edge of the screen. If LMARGIN is 0, we need to take the | |
818 | wrap offset into account. */ | |
28ef6c31 | 819 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
726f6388 | 820 | if (t < out) |
b72432fd | 821 | line[t - 1] = '>'; |
726f6388 JA |
822 | |
823 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
824 | { | |
825 | forced_display = 0; | |
826 | update_line (&visible_line[last_lmargin], | |
827 | &invisible_line[lmargin], | |
828 | 0, | |
28ef6c31 JA |
829 | _rl_screenwidth + visible_wrap_offset, |
830 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), | |
726f6388 JA |
831 | 0); |
832 | ||
833 | /* If the visible new line is shorter than the old, but the number | |
834 | of invisible characters is greater, and we are at the end of | |
835 | the new line, we need to clear to eol. */ | |
836 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
837 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
838 | (_rl_last_c_pos == out) && | |
839 | t < visible_first_line_len) | |
840 | { | |
28ef6c31 | 841 | nleft = _rl_screenwidth - t; |
d166f048 | 842 | _rl_clear_to_eol (nleft); |
726f6388 JA |
843 | } |
844 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
28ef6c31 JA |
845 | if (visible_first_line_len > _rl_screenwidth) |
846 | visible_first_line_len = _rl_screenwidth; | |
726f6388 JA |
847 | |
848 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); | |
849 | last_lmargin = lmargin; | |
850 | } | |
851 | } | |
852 | fflush (rl_outstream); | |
853 | ||
854 | /* Swap visible and non-visible lines. */ | |
855 | { | |
28ef6c31 | 856 | char *vtemp = visible_line; |
bb70624e JA |
857 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
858 | ||
726f6388 | 859 | visible_line = invisible_line; |
28ef6c31 | 860 | invisible_line = vtemp; |
bb70624e | 861 | |
ccc6cda3 JA |
862 | vis_lbreaks = inv_lbreaks; |
863 | inv_lbreaks = itemp; | |
bb70624e JA |
864 | |
865 | vis_lbsize = inv_lbsize; | |
866 | inv_lbsize = ntemp; | |
867 | ||
726f6388 JA |
868 | rl_display_fixed = 0; |
869 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
870 | are not displaying any invisible characters, so set visible_wrap_offset | |
871 | to 0. */ | |
872 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
873 | visible_wrap_offset = 0; | |
874 | else | |
875 | visible_wrap_offset = wrap_offset; | |
876 | } | |
877 | } | |
878 | ||
879 | /* PWP: update_line() is based on finding the middle difference of each | |
880 | line on the screen; vis: | |
881 | ||
882 | /old first difference | |
883 | /beginning of line | /old last same /old EOL | |
884 | v v v v | |
885 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
886 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
887 | ^ ^ ^ ^ | |
888 | \beginning of line | \new last same \new end of line | |
889 | \new first difference | |
890 | ||
891 | All are character pointers for the sake of speed. Special cases for | |
b72432fd | 892 | no differences, as well as for end of line additions must be handled. |
726f6388 JA |
893 | |
894 | Could be made even smarter, but this works well enough */ | |
895 | static void | |
896 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
897 | register char *old, *new; | |
ccc6cda3 | 898 | int current_line, omax, nmax, inv_botlin; |
726f6388 JA |
899 | { |
900 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
901 | int temp, lendiff, wsatend, od, nd; | |
ccc6cda3 | 902 | int current_invis_chars; |
726f6388 JA |
903 | |
904 | /* If we're at the right edge of a terminal that supports xn, we're | |
905 | ready to wrap around, so do so. This fixes problems with knowing | |
906 | the exact cursor position and cut-and-paste with certain terminal | |
907 | emulators. In this calculation, TEMP is the physical screen | |
908 | position of the cursor. */ | |
909 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
28ef6c31 | 910 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
726f6388 JA |
911 | && _rl_last_v_pos == current_line - 1) |
912 | { | |
913 | if (new[0]) | |
914 | putc (new[0], rl_outstream); | |
915 | else | |
916 | putc (' ', rl_outstream); | |
917 | _rl_last_c_pos = 1; /* XXX */ | |
918 | _rl_last_v_pos++; | |
919 | if (old[0] && new[0]) | |
b72432fd | 920 | old[0] = new[0]; |
726f6388 JA |
921 | } |
922 | ||
923 | /* Find first difference. */ | |
924 | for (ofd = old, nfd = new; | |
925 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
926 | ofd++, nfd++) | |
927 | ; | |
928 | ||
929 | /* Move to the end of the screen line. ND and OD are used to keep track | |
930 | of the distance between ne and new and oe and old, respectively, to | |
931 | move a subtraction out of each loop. */ | |
932 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
933 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
934 | ||
935 | /* If no difference, continue to next line. */ | |
936 | if (ofd == oe && nfd == ne) | |
937 | return; | |
938 | ||
939 | wsatend = 1; /* flag for trailing whitespace */ | |
940 | ols = oe - 1; /* find last same */ | |
941 | nls = ne - 1; | |
942 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
943 | { | |
944 | if (*ols != ' ') | |
945 | wsatend = 0; | |
946 | ols--; | |
947 | nls--; | |
948 | } | |
949 | ||
950 | if (wsatend) | |
951 | { | |
952 | ols = oe; | |
953 | nls = ne; | |
954 | } | |
955 | else if (*ols != *nls) | |
956 | { | |
957 | if (*ols) /* don't step past the NUL */ | |
958 | ols++; | |
959 | if (*nls) | |
960 | nls++; | |
961 | } | |
962 | ||
ccc6cda3 JA |
963 | /* count of invisible characters in the current invisible line. */ |
964 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
965 | if (_rl_last_v_pos != current_line) | |
966 | { | |
967 | _rl_move_vert (current_line); | |
968 | if (current_line == 0 && visible_wrap_offset) | |
969 | _rl_last_c_pos += visible_wrap_offset; | |
970 | } | |
726f6388 JA |
971 | |
972 | /* If this is the first line and there are invisible characters in the | |
ccc6cda3 JA |
973 | prompt string, and the prompt string has not changed, and the current |
974 | cursor position is before the last invisible character in the prompt, | |
975 | and the index of the character to move to is past the end of the prompt | |
976 | string, then redraw the entire prompt string. We can only do this | |
977 | reliably if the terminal supports a `cr' capability. | |
726f6388 | 978 | |
ccc6cda3 JA |
979 | This is not an efficiency hack -- there is a problem with redrawing |
980 | portions of the prompt string if they contain terminal escape | |
981 | sequences (like drawing the `unbold' sequence without a corresponding | |
982 | `bold') that manifests itself on certain terminals. */ | |
726f6388 JA |
983 | |
984 | lendiff = local_prompt ? strlen (local_prompt) : 0; | |
ccc6cda3 | 985 | od = ofd - old; /* index of first difference in visible line */ |
726f6388 | 986 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
28ef6c31 JA |
987 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
988 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) | |
726f6388 | 989 | { |
bb70624e JA |
990 | #if defined (__MSDOS__) |
991 | putc ('\r', rl_outstream); | |
992 | #else | |
28ef6c31 | 993 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 994 | #endif |
726f6388 JA |
995 | _rl_output_some_chars (local_prompt, lendiff); |
996 | _rl_last_c_pos = lendiff; | |
997 | } | |
998 | ||
ccc6cda3 | 999 | _rl_move_cursor_relative (od, old); |
726f6388 JA |
1000 | |
1001 | /* if (len (new) > len (old)) */ | |
1002 | lendiff = (nls - nfd) - (ols - ofd); | |
1003 | ||
ccc6cda3 JA |
1004 | /* If we are changing the number of invisible characters in a line, and |
1005 | the spot of first difference is before the end of the invisible chars, | |
1006 | lendiff needs to be adjusted. */ | |
1007 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
1008 | current_invis_chars != visible_wrap_offset) | |
b72432fd | 1009 | lendiff += visible_wrap_offset - current_invis_chars; |
ccc6cda3 | 1010 | |
726f6388 JA |
1011 | /* Insert (diff (len (old), len (new)) ch. */ |
1012 | temp = ne - nfd; | |
1013 | if (lendiff > 0) | |
1014 | { | |
1015 | /* Non-zero if we're increasing the number of lines. */ | |
1016 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
1017 | /* Sometimes it is cheaper to print the characters rather than | |
1018 | use the terminal's capabilities. If we're growing the number | |
1019 | of lines, make sure we actually cause the new line to wrap | |
1020 | around on auto-wrapping terminals. */ | |
28ef6c31 | 1021 | if (_rl_terminal_can_insert && ((2 * temp) >= lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
726f6388 | 1022 | { |
28ef6c31 | 1023 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
726f6388 | 1024 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
28ef6c31 | 1025 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
726f6388 JA |
1026 | invisible characters. We need to just draw them. */ |
1027 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
28ef6c31 | 1028 | lendiff <= prompt_visible_length || !current_invis_chars)) |
726f6388 JA |
1029 | { |
1030 | insert_some_chars (nfd, lendiff); | |
1031 | _rl_last_c_pos += lendiff; | |
1032 | } | |
ccc6cda3 | 1033 | else if (*ols == 0) |
726f6388 JA |
1034 | { |
1035 | /* At the end of a line the characters do not have to | |
1036 | be "inserted". They can just be placed on the screen. */ | |
ccc6cda3 | 1037 | /* However, this screws up the rest of this block, which |
b72432fd | 1038 | assumes you've done the insert because you can. */ |
726f6388 JA |
1039 | _rl_output_some_chars (nfd, lendiff); |
1040 | _rl_last_c_pos += lendiff; | |
1041 | } | |
ccc6cda3 JA |
1042 | else |
1043 | { | |
1044 | /* We have horizontal scrolling and we are not inserting at | |
1045 | the end. We have invisible characters in this line. This | |
1046 | is a dumb update. */ | |
1047 | _rl_output_some_chars (nfd, temp); | |
1048 | _rl_last_c_pos += temp; | |
1049 | return; | |
1050 | } | |
726f6388 JA |
1051 | /* Copy (new) chars to screen from first diff to last match. */ |
1052 | temp = nls - nfd; | |
1053 | if ((temp - lendiff) > 0) | |
1054 | { | |
1055 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
1056 | _rl_last_c_pos += temp - lendiff; | |
1057 | } | |
1058 | } | |
1059 | else | |
1060 | { | |
1061 | /* cannot insert chars, write to EOL */ | |
1062 | _rl_output_some_chars (nfd, temp); | |
1063 | _rl_last_c_pos += temp; | |
1064 | } | |
1065 | } | |
1066 | else /* Delete characters from line. */ | |
1067 | { | |
1068 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
28ef6c31 | 1069 | if (_rl_term_dc && (2 * temp) >= -lendiff) |
726f6388 JA |
1070 | { |
1071 | /* If all we're doing is erasing the invisible characters in the | |
1072 | prompt string, don't bother. It screws up the assumptions | |
1073 | about what's on the screen. */ | |
1074 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
1075 | -lendiff == visible_wrap_offset) | |
1076 | lendiff = 0; | |
1077 | ||
1078 | if (lendiff) | |
1079 | delete_chars (-lendiff); /* delete (diff) characters */ | |
1080 | ||
1081 | /* Copy (new) chars to screen from first diff to last match */ | |
1082 | temp = nls - nfd; | |
1083 | if (temp > 0) | |
1084 | { | |
1085 | _rl_output_some_chars (nfd, temp); | |
1086 | _rl_last_c_pos += temp; | |
1087 | } | |
1088 | } | |
1089 | /* Otherwise, print over the existing material. */ | |
1090 | else | |
1091 | { | |
1092 | if (temp > 0) | |
1093 | { | |
1094 | _rl_output_some_chars (nfd, temp); | |
1095 | _rl_last_c_pos += temp; | |
1096 | } | |
1097 | lendiff = (oe - old) - (ne - new); | |
b72432fd JA |
1098 | if (lendiff) |
1099 | { | |
1100 | if (_rl_term_autowrap && current_line < inv_botlin) | |
1101 | space_to_eol (lendiff); | |
1102 | else | |
1103 | _rl_clear_to_eol (lendiff); | |
1104 | } | |
726f6388 JA |
1105 | } |
1106 | } | |
1107 | } | |
1108 | ||
1109 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
ccc6cda3 | 1110 | int |
726f6388 JA |
1111 | rl_on_new_line () |
1112 | { | |
1113 | if (visible_line) | |
1114 | visible_line[0] = '\0'; | |
1115 | ||
1116 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1117 | _rl_vis_botlin = last_lmargin = 0; | |
ccc6cda3 JA |
1118 | if (vis_lbreaks) |
1119 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1120 | visible_wrap_offset = 0; | |
726f6388 JA |
1121 | return 0; |
1122 | } | |
1123 | ||
bb70624e JA |
1124 | /* Tell the update routines that we have moved onto a new line with the |
1125 | prompt already displayed. Code originally from the version of readline | |
1126 | distributed with CLISP. */ | |
1127 | int | |
1128 | rl_on_new_line_with_prompt () | |
1129 | { | |
1130 | int prompt_size, i, l, real_screenwidth, newlines; | |
1131 | char *prompt_last_line; | |
1132 | ||
1133 | /* Initialize visible_line and invisible_line to ensure that they can hold | |
1134 | the already-displayed prompt. */ | |
1135 | prompt_size = strlen (rl_prompt) + 1; | |
1136 | init_line_structures (prompt_size); | |
1137 | ||
1138 | /* Make sure the line structures hold the already-displayed prompt for | |
1139 | redisplay. */ | |
1140 | strcpy (visible_line, rl_prompt); | |
1141 | strcpy (invisible_line, rl_prompt); | |
1142 | ||
1143 | /* If the prompt contains newlines, take the last tail. */ | |
1144 | prompt_last_line = strrchr (rl_prompt, '\n'); | |
1145 | if (!prompt_last_line) | |
1146 | prompt_last_line = rl_prompt; | |
1147 | ||
1148 | l = strlen (prompt_last_line); | |
1149 | _rl_last_c_pos = l; | |
1150 | ||
1151 | /* Dissect prompt_last_line into screen lines. Note that here we have | |
1152 | to use the real screenwidth. Readline's notion of screenwidth might be | |
1153 | one less, see terminal.c. */ | |
28ef6c31 | 1154 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
bb70624e JA |
1155 | _rl_last_v_pos = l / real_screenwidth; |
1156 | /* If the prompt length is a multiple of real_screenwidth, we don't know | |
1157 | whether the cursor is at the end of the last line, or already at the | |
1158 | beginning of the next line. Output a newline just to be safe. */ | |
1159 | if (l > 0 && (l % real_screenwidth) == 0) | |
1160 | _rl_output_some_chars ("\n", 1); | |
1161 | last_lmargin = 0; | |
1162 | ||
1163 | newlines = 0; i = 0; | |
1164 | while (i <= l) | |
1165 | { | |
1166 | _rl_vis_botlin = newlines; | |
1167 | vis_lbreaks[newlines++] = i; | |
1168 | i += real_screenwidth; | |
1169 | } | |
1170 | vis_lbreaks[newlines] = l; | |
1171 | visible_wrap_offset = 0; | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
726f6388 | 1176 | /* Actually update the display, period. */ |
ccc6cda3 | 1177 | int |
726f6388 JA |
1178 | rl_forced_update_display () |
1179 | { | |
1180 | if (visible_line) | |
1181 | { | |
1182 | register char *temp = visible_line; | |
1183 | ||
ccc6cda3 | 1184 | while (*temp) |
b72432fd | 1185 | *temp++ = '\0'; |
726f6388 JA |
1186 | } |
1187 | rl_on_new_line (); | |
1188 | forced_display++; | |
ccc6cda3 | 1189 | (*rl_redisplay_function) (); |
726f6388 JA |
1190 | return 0; |
1191 | } | |
1192 | ||
1193 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
1194 | DATA is the contents of the screen line of interest; i.e., where | |
1195 | the movement is being done. */ | |
1196 | void | |
1197 | _rl_move_cursor_relative (new, data) | |
1198 | int new; | |
28ef6c31 | 1199 | const char *data; |
726f6388 JA |
1200 | { |
1201 | register int i; | |
1202 | ||
1203 | /* If we don't have to do anything, then return. */ | |
1204 | if (_rl_last_c_pos == new) return; | |
1205 | ||
1206 | /* It may be faster to output a CR, and then move forwards instead | |
1207 | of moving backwards. */ | |
1208 | /* i == current physical cursor position. */ | |
1209 | i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
ccc6cda3 | 1210 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || |
28ef6c31 | 1211 | (_rl_term_autowrap && i == _rl_screenwidth)) |
726f6388 JA |
1212 | { |
1213 | #if defined (__MSDOS__) | |
1214 | putc ('\r', rl_outstream); | |
1215 | #else | |
28ef6c31 | 1216 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
726f6388 JA |
1217 | #endif /* !__MSDOS__ */ |
1218 | _rl_last_c_pos = 0; | |
1219 | } | |
1220 | ||
1221 | if (_rl_last_c_pos < new) | |
1222 | { | |
1223 | /* Move the cursor forward. We do it by printing the command | |
1224 | to move the cursor forward if there is one, else print that | |
1225 | portion of the output buffer again. Which is cheaper? */ | |
1226 | ||
1227 | /* The above comment is left here for posterity. It is faster | |
1228 | to print one character (non-control) than to print a control | |
1229 | sequence telling the terminal to move forward one character. | |
1230 | That kind of control is for people who don't know what the | |
1231 | data is underneath the cursor. */ | |
1232 | #if defined (HACK_TERMCAP_MOTION) | |
28ef6c31 | 1233 | if (_rl_term_forward_char) |
726f6388 | 1234 | for (i = _rl_last_c_pos; i < new; i++) |
28ef6c31 | 1235 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); |
726f6388 JA |
1236 | else |
1237 | for (i = _rl_last_c_pos; i < new; i++) | |
1238 | putc (data[i], rl_outstream); | |
1239 | #else | |
1240 | for (i = _rl_last_c_pos; i < new; i++) | |
1241 | putc (data[i], rl_outstream); | |
1242 | #endif /* HACK_TERMCAP_MOTION */ | |
1243 | } | |
b72432fd | 1244 | else if (_rl_last_c_pos > new) |
ccc6cda3 | 1245 | _rl_backspace (_rl_last_c_pos - new); |
726f6388 JA |
1246 | _rl_last_c_pos = new; |
1247 | } | |
1248 | ||
1249 | /* PWP: move the cursor up or down. */ | |
1250 | void | |
1251 | _rl_move_vert (to) | |
1252 | int to; | |
1253 | { | |
1254 | register int delta, i; | |
1255 | ||
28ef6c31 | 1256 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
726f6388 JA |
1257 | return; |
1258 | ||
726f6388 JA |
1259 | if ((delta = to - _rl_last_v_pos) > 0) |
1260 | { | |
1261 | for (i = 0; i < delta; i++) | |
1262 | putc ('\n', rl_outstream); | |
bb70624e JA |
1263 | #if defined (__MSDOS__) |
1264 | putc ('\r', rl_outstream); | |
1265 | #else | |
28ef6c31 | 1266 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1267 | #endif |
726f6388 JA |
1268 | _rl_last_c_pos = 0; |
1269 | } | |
1270 | else | |
1271 | { /* delta < 0 */ | |
28ef6c31 | 1272 | if (_rl_term_up && *_rl_term_up) |
726f6388 | 1273 | for (i = 0; i < -delta; i++) |
28ef6c31 | 1274 | tputs (_rl_term_up, 1, _rl_output_character_function); |
726f6388 | 1275 | } |
bb70624e | 1276 | |
726f6388 JA |
1277 | _rl_last_v_pos = to; /* Now TO is here */ |
1278 | } | |
1279 | ||
1280 | /* Physically print C on rl_outstream. This is for functions which know | |
1281 | how to optimize the display. Return the number of characters output. */ | |
ccc6cda3 | 1282 | int |
726f6388 JA |
1283 | rl_show_char (c) |
1284 | int c; | |
1285 | { | |
1286 | int n = 1; | |
1287 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1288 | { | |
1289 | fprintf (rl_outstream, "M-"); | |
1290 | n += 2; | |
1291 | c = UNMETA (c); | |
1292 | } | |
1293 | ||
1294 | #if defined (DISPLAY_TABS) | |
ccc6cda3 | 1295 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
726f6388 | 1296 | #else |
ccc6cda3 | 1297 | if (CTRL_CHAR (c) || c == RUBOUT) |
726f6388 JA |
1298 | #endif /* !DISPLAY_TABS */ |
1299 | { | |
1300 | fprintf (rl_outstream, "C-"); | |
1301 | n += 2; | |
ccc6cda3 | 1302 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
726f6388 JA |
1303 | } |
1304 | ||
1305 | putc (c, rl_outstream); | |
1306 | fflush (rl_outstream); | |
1307 | return n; | |
1308 | } | |
1309 | ||
1310 | int | |
1311 | rl_character_len (c, pos) | |
1312 | register int c, pos; | |
1313 | { | |
1314 | unsigned char uc; | |
1315 | ||
1316 | uc = (unsigned char)c; | |
1317 | ||
1318 | if (META_CHAR (uc)) | |
1319 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1320 | ||
1321 | if (uc == '\t') | |
1322 | { | |
1323 | #if defined (DISPLAY_TABS) | |
1324 | return (((pos | 7) + 1) - pos); | |
1325 | #else | |
1326 | return (2); | |
1327 | #endif /* !DISPLAY_TABS */ | |
1328 | } | |
1329 | ||
ccc6cda3 JA |
1330 | if (CTRL_CHAR (c) || c == RUBOUT) |
1331 | return (2); | |
1332 | ||
726f6388 JA |
1333 | return ((isprint (uc)) ? 1 : 2); |
1334 | } | |
1335 | ||
1336 | /* How to print things in the "echo-area". The prompt is treated as a | |
1337 | mini-modeline. */ | |
1338 | ||
ccc6cda3 JA |
1339 | #if defined (USE_VARARGS) |
1340 | int | |
1341 | #if defined (PREFER_STDARG) | |
1342 | rl_message (const char *format, ...) | |
1343 | #else | |
726f6388 JA |
1344 | rl_message (va_alist) |
1345 | va_dcl | |
ccc6cda3 | 1346 | #endif |
726f6388 | 1347 | { |
726f6388 | 1348 | va_list args; |
ccc6cda3 JA |
1349 | #if defined (PREFER_VARARGS) |
1350 | char *format; | |
1351 | #endif | |
726f6388 | 1352 | |
ccc6cda3 JA |
1353 | #if defined (PREFER_STDARG) |
1354 | va_start (args, format); | |
1355 | #else | |
726f6388 JA |
1356 | va_start (args); |
1357 | format = va_arg (args, char *); | |
ccc6cda3 JA |
1358 | #endif |
1359 | ||
726f6388 JA |
1360 | vsprintf (msg_buf, format, args); |
1361 | va_end (args); | |
1362 | ||
1363 | rl_display_prompt = msg_buf; | |
ccc6cda3 | 1364 | (*rl_redisplay_function) (); |
726f6388 JA |
1365 | return 0; |
1366 | } | |
ccc6cda3 JA |
1367 | #else /* !USE_VARARGS */ |
1368 | int | |
726f6388 JA |
1369 | rl_message (format, arg1, arg2) |
1370 | char *format; | |
1371 | { | |
1372 | sprintf (msg_buf, format, arg1, arg2); | |
1373 | rl_display_prompt = msg_buf; | |
ccc6cda3 | 1374 | (*rl_redisplay_function) (); |
726f6388 JA |
1375 | return 0; |
1376 | } | |
ccc6cda3 | 1377 | #endif /* !USE_VARARGS */ |
726f6388 JA |
1378 | |
1379 | /* How to clear things from the "echo-area". */ | |
ccc6cda3 | 1380 | int |
726f6388 JA |
1381 | rl_clear_message () |
1382 | { | |
1383 | rl_display_prompt = rl_prompt; | |
ccc6cda3 | 1384 | (*rl_redisplay_function) (); |
726f6388 JA |
1385 | return 0; |
1386 | } | |
1387 | ||
ccc6cda3 | 1388 | int |
726f6388 JA |
1389 | rl_reset_line_state () |
1390 | { | |
1391 | rl_on_new_line (); | |
1392 | ||
1393 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
1394 | forced_display = 1; | |
1395 | return 0; | |
1396 | } | |
1397 | ||
ccc6cda3 JA |
1398 | static char *saved_local_prompt; |
1399 | static char *saved_local_prefix; | |
1400 | static int saved_last_invisible; | |
1401 | static int saved_visible_length; | |
1402 | ||
1403 | void | |
b72432fd | 1404 | rl_save_prompt () |
ccc6cda3 JA |
1405 | { |
1406 | saved_local_prompt = local_prompt; | |
1407 | saved_local_prefix = local_prompt_prefix; | |
28ef6c31 JA |
1408 | saved_last_invisible = prompt_last_invisible; |
1409 | saved_visible_length = prompt_visible_length; | |
ccc6cda3 JA |
1410 | |
1411 | local_prompt = local_prompt_prefix = (char *)0; | |
28ef6c31 | 1412 | prompt_last_invisible = prompt_visible_length = 0; |
ccc6cda3 JA |
1413 | } |
1414 | ||
1415 | void | |
b72432fd | 1416 | rl_restore_prompt () |
ccc6cda3 | 1417 | { |
28ef6c31 JA |
1418 | FREE (local_prompt); |
1419 | FREE (local_prompt_prefix); | |
ccc6cda3 JA |
1420 | |
1421 | local_prompt = saved_local_prompt; | |
1422 | local_prompt_prefix = saved_local_prefix; | |
28ef6c31 JA |
1423 | prompt_last_invisible = saved_last_invisible; |
1424 | prompt_visible_length = saved_visible_length; | |
ccc6cda3 JA |
1425 | } |
1426 | ||
1427 | char * | |
1428 | _rl_make_prompt_for_search (pchar) | |
1429 | int pchar; | |
1430 | { | |
1431 | int len; | |
1432 | char *pmt; | |
1433 | ||
b72432fd | 1434 | rl_save_prompt (); |
ccc6cda3 JA |
1435 | |
1436 | if (saved_local_prompt == 0) | |
1437 | { | |
1438 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
1439 | pmt = xmalloc (len + 2); | |
1440 | if (len) | |
b72432fd | 1441 | strcpy (pmt, rl_prompt); |
ccc6cda3 JA |
1442 | pmt[len] = pchar; |
1443 | pmt[len+1] = '\0'; | |
1444 | } | |
1445 | else | |
1446 | { | |
1447 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; | |
1448 | pmt = xmalloc (len + 2); | |
1449 | if (len) | |
b72432fd | 1450 | strcpy (pmt, saved_local_prompt); |
ccc6cda3 JA |
1451 | pmt[len] = pchar; |
1452 | pmt[len+1] = '\0'; | |
1453 | local_prompt = savestring (pmt); | |
28ef6c31 JA |
1454 | prompt_last_invisible = saved_last_invisible; |
1455 | prompt_visible_length = saved_visible_length + 1; | |
ccc6cda3 JA |
1456 | } |
1457 | return pmt; | |
1458 | } | |
1459 | ||
726f6388 JA |
1460 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
1461 | void | |
1462 | _rl_erase_at_end_of_line (l) | |
1463 | int l; | |
1464 | { | |
1465 | register int i; | |
1466 | ||
ccc6cda3 | 1467 | _rl_backspace (l); |
726f6388 JA |
1468 | for (i = 0; i < l; i++) |
1469 | putc (' ', rl_outstream); | |
ccc6cda3 | 1470 | _rl_backspace (l); |
726f6388 JA |
1471 | for (i = 0; i < l; i++) |
1472 | visible_line[--_rl_last_c_pos] = '\0'; | |
1473 | rl_display_fixed++; | |
1474 | } | |
1475 | ||
1476 | /* Clear to the end of the line. COUNT is the minimum | |
1477 | number of character spaces to clear, */ | |
d166f048 JA |
1478 | void |
1479 | _rl_clear_to_eol (count) | |
726f6388 JA |
1480 | int count; |
1481 | { | |
28ef6c31 JA |
1482 | if (_rl_term_clreol) |
1483 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
d166f048 | 1484 | else if (count) |
726f6388 JA |
1485 | space_to_eol (count); |
1486 | } | |
1487 | ||
1488 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
1489 | number of character spaces to clear, */ | |
1490 | static void | |
1491 | space_to_eol (count) | |
1492 | int count; | |
1493 | { | |
1494 | register int i; | |
1495 | ||
1496 | for (i = 0; i < count; i++) | |
1497 | putc (' ', rl_outstream); | |
1498 | ||
1499 | _rl_last_c_pos += count; | |
1500 | } | |
1501 | ||
d166f048 JA |
1502 | void |
1503 | _rl_clear_screen () | |
1504 | { | |
28ef6c31 JA |
1505 | if (_rl_term_clrpag) |
1506 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); | |
d166f048 | 1507 | else |
28ef6c31 | 1508 | rl_crlf (); |
d166f048 JA |
1509 | } |
1510 | ||
726f6388 JA |
1511 | /* Insert COUNT characters from STRING to the output stream. */ |
1512 | static void | |
1513 | insert_some_chars (string, count) | |
1514 | char *string; | |
1515 | int count; | |
1516 | { | |
726f6388 | 1517 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
28ef6c31 | 1518 | if (_rl_term_IC) |
726f6388 | 1519 | { |
ccc6cda3 | 1520 | char *buffer; |
28ef6c31 | 1521 | buffer = tgoto (_rl_term_IC, 0, count); |
726f6388 JA |
1522 | tputs (buffer, 1, _rl_output_character_function); |
1523 | _rl_output_some_chars (string, count); | |
1524 | } | |
1525 | else | |
1526 | { | |
1527 | register int i; | |
1528 | ||
1529 | /* If we have to turn on insert-mode, then do so. */ | |
28ef6c31 JA |
1530 | if (_rl_term_im && *_rl_term_im) |
1531 | tputs (_rl_term_im, 1, _rl_output_character_function); | |
726f6388 JA |
1532 | |
1533 | /* If there is a special command for inserting characters, then | |
1534 | use that first to open up the space. */ | |
28ef6c31 | 1535 | if (_rl_term_ic && *_rl_term_ic) |
726f6388 JA |
1536 | { |
1537 | for (i = count; i--; ) | |
28ef6c31 | 1538 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
726f6388 JA |
1539 | } |
1540 | ||
1541 | /* Print the text. */ | |
1542 | _rl_output_some_chars (string, count); | |
1543 | ||
1544 | /* If there is a string to turn off insert mode, we had best use | |
1545 | it now. */ | |
28ef6c31 JA |
1546 | if (_rl_term_ei && *_rl_term_ei) |
1547 | tputs (_rl_term_ei, 1, _rl_output_character_function); | |
726f6388 | 1548 | } |
726f6388 JA |
1549 | } |
1550 | ||
1551 | /* Delete COUNT characters from the display line. */ | |
1552 | static void | |
1553 | delete_chars (count) | |
1554 | int count; | |
1555 | { | |
28ef6c31 | 1556 | if (count > _rl_screenwidth) /* XXX */ |
726f6388 JA |
1557 | return; |
1558 | ||
28ef6c31 | 1559 | if (_rl_term_DC && *_rl_term_DC) |
726f6388 | 1560 | { |
ccc6cda3 | 1561 | char *buffer; |
28ef6c31 | 1562 | buffer = tgoto (_rl_term_DC, count, count); |
726f6388 JA |
1563 | tputs (buffer, count, _rl_output_character_function); |
1564 | } | |
1565 | else | |
1566 | { | |
28ef6c31 | 1567 | if (_rl_term_dc && *_rl_term_dc) |
726f6388 | 1568 | while (count--) |
28ef6c31 | 1569 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
726f6388 | 1570 | } |
726f6388 JA |
1571 | } |
1572 | ||
1573 | void | |
1574 | _rl_update_final () | |
1575 | { | |
1576 | int full_lines; | |
1577 | ||
1578 | full_lines = 0; | |
ccc6cda3 JA |
1579 | /* If the cursor is the only thing on an otherwise-blank last line, |
1580 | compensate so we don't print an extra CRLF. */ | |
1581 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
d166f048 | 1582 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
726f6388 JA |
1583 | { |
1584 | _rl_vis_botlin--; | |
1585 | full_lines = 1; | |
1586 | } | |
1587 | _rl_move_vert (_rl_vis_botlin); | |
ccc6cda3 | 1588 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
28ef6c31 | 1589 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
726f6388 | 1590 | { |
726f6388 | 1591 | char *last_line; |
bb70624e | 1592 | #if 0 |
ccc6cda3 | 1593 | last_line = &visible_line[inv_lbreaks[_rl_vis_botlin]]; |
bb70624e JA |
1594 | #else |
1595 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; | |
1596 | #endif | |
28ef6c31 | 1597 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
d166f048 | 1598 | _rl_clear_to_eol (0); |
28ef6c31 | 1599 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
726f6388 JA |
1600 | } |
1601 | _rl_vis_botlin = 0; | |
28ef6c31 | 1602 | rl_crlf (); |
726f6388 JA |
1603 | fflush (rl_outstream); |
1604 | rl_display_fixed++; | |
1605 | } | |
1606 | ||
1607 | /* Move to the start of the current line. */ | |
1608 | static void | |
1609 | cr () | |
1610 | { | |
28ef6c31 | 1611 | if (_rl_term_cr) |
726f6388 | 1612 | { |
bb70624e JA |
1613 | #if defined (__MSDOS__) |
1614 | putc ('\r', rl_outstream); | |
1615 | #else | |
28ef6c31 | 1616 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1617 | #endif |
726f6388 JA |
1618 | _rl_last_c_pos = 0; |
1619 | } | |
1620 | } | |
1621 | ||
bb70624e JA |
1622 | /* Redraw the last line of a multi-line prompt that may possibly contain |
1623 | terminal escape sequences. Called with the cursor at column 0 of the | |
1624 | line to draw the prompt on. */ | |
1625 | static void | |
1626 | redraw_prompt (t) | |
1627 | char *t; | |
1628 | { | |
1629 | char *oldp, *oldl, *oldlprefix; | |
28ef6c31 | 1630 | int oldlen, oldlast, oldplen, oldninvis; |
bb70624e JA |
1631 | |
1632 | /* Geez, I should make this a struct. */ | |
1633 | oldp = rl_display_prompt; | |
1634 | oldl = local_prompt; | |
1635 | oldlprefix = local_prompt_prefix; | |
28ef6c31 JA |
1636 | oldlen = prompt_visible_length; |
1637 | oldplen = prompt_prefix_length; | |
1638 | oldlast = prompt_last_invisible; | |
1639 | oldninvis = prompt_invis_chars_first_line; | |
bb70624e JA |
1640 | |
1641 | rl_display_prompt = t; | |
28ef6c31 JA |
1642 | local_prompt = expand_prompt (t, &prompt_visible_length, |
1643 | &prompt_last_invisible, | |
1644 | &prompt_invis_chars_first_line); | |
bb70624e JA |
1645 | local_prompt_prefix = (char *)NULL; |
1646 | rl_forced_update_display (); | |
1647 | ||
1648 | rl_display_prompt = oldp; | |
1649 | local_prompt = oldl; | |
1650 | local_prompt_prefix = oldlprefix; | |
28ef6c31 JA |
1651 | prompt_visible_length = oldlen; |
1652 | prompt_prefix_length = oldplen; | |
1653 | prompt_last_invisible = oldlast; | |
1654 | prompt_invis_chars_first_line = oldninvis; | |
bb70624e JA |
1655 | } |
1656 | ||
726f6388 JA |
1657 | /* Redisplay the current line after a SIGWINCH is received. */ |
1658 | void | |
1659 | _rl_redisplay_after_sigwinch () | |
1660 | { | |
bb70624e | 1661 | char *t; |
726f6388 JA |
1662 | |
1663 | /* Clear the current line and put the cursor at column 0. Make sure | |
1664 | the right thing happens if we have wrapped to a new screen line. */ | |
28ef6c31 | 1665 | if (_rl_term_cr) |
726f6388 | 1666 | { |
bb70624e JA |
1667 | #if defined (__MSDOS__) |
1668 | putc ('\r', rl_outstream); | |
1669 | #else | |
28ef6c31 | 1670 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
bb70624e | 1671 | #endif |
726f6388 | 1672 | _rl_last_c_pos = 0; |
bb70624e | 1673 | #if defined (__MSDOS__) |
28ef6c31 | 1674 | space_to_eol (_rl_screenwidth); |
bb70624e JA |
1675 | putc ('\r', rl_outstream); |
1676 | #else | |
28ef6c31 JA |
1677 | if (_rl_term_clreol) |
1678 | tputs (_rl_term_clreol, 1, _rl_output_character_function); | |
726f6388 JA |
1679 | else |
1680 | { | |
28ef6c31 JA |
1681 | space_to_eol (_rl_screenwidth); |
1682 | tputs (_rl_term_cr, 1, _rl_output_character_function); | |
726f6388 | 1683 | } |
bb70624e | 1684 | #endif |
726f6388 JA |
1685 | if (_rl_last_v_pos > 0) |
1686 | _rl_move_vert (0); | |
1687 | } | |
1688 | else | |
28ef6c31 | 1689 | rl_crlf (); |
726f6388 JA |
1690 | |
1691 | /* Redraw only the last line of a multi-line prompt. */ | |
1692 | t = strrchr (rl_display_prompt, '\n'); | |
1693 | if (t) | |
bb70624e | 1694 | redraw_prompt (++t); |
726f6388 JA |
1695 | else |
1696 | rl_forced_update_display (); | |
1697 | } | |
ccc6cda3 JA |
1698 | |
1699 | void | |
1700 | _rl_clean_up_for_exit () | |
1701 | { | |
1702 | if (readline_echoing_p) | |
1703 | { | |
1704 | _rl_move_vert (_rl_vis_botlin); | |
1705 | _rl_vis_botlin = 0; | |
1706 | fflush (rl_outstream); | |
b72432fd | 1707 | rl_restart_output (1, 0); |
ccc6cda3 JA |
1708 | } |
1709 | } | |
b72432fd JA |
1710 | |
1711 | void | |
1712 | _rl_erase_entire_line () | |
1713 | { | |
1714 | cr (); | |
1715 | _rl_clear_to_eol (0); | |
1716 | cr (); | |
1717 | fflush (rl_outstream); | |
1718 | } | |
bb70624e JA |
1719 | |
1720 | /* return the `current display line' of the cursor -- the number of lines to | |
1721 | move up to get to the first screen line of the current readline line. */ | |
1722 | int | |
1723 | _rl_current_display_line () | |
1724 | { | |
1725 | int ret, nleft; | |
1726 | ||
1727 | /* Find out whether or not there might be invisible characters in the | |
1728 | editing buffer. */ | |
1729 | if (rl_display_prompt == rl_prompt) | |
28ef6c31 | 1730 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
bb70624e | 1731 | else |
28ef6c31 | 1732 | nleft = _rl_last_c_pos - _rl_screenwidth; |
bb70624e JA |
1733 | |
1734 | if (nleft > 0) | |
28ef6c31 | 1735 | ret = 1 + nleft / _rl_screenwidth; |
bb70624e JA |
1736 | else |
1737 | ret = 0; | |
1738 | ||
1739 | return ret; | |
1740 | } |