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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 | |
10 | as published by the Free Software Foundation; either version 1, or | |
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, | |
21 | 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
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 | ||
44 | #if defined (__GO32__) | |
45 | # include <go32.h> | |
46 | # include <pc.h> | |
47 | #endif /* __GO32__ */ | |
48 | ||
49 | /* System-specific feature definitions and include files. */ | |
50 | #include "rldefs.h" | |
51 | ||
52 | /* Termcap library stuff. */ | |
53 | #include "tcap.h" | |
54 | ||
55 | /* Some standard library routines. */ | |
56 | #include "readline.h" | |
57 | #include "history.h" | |
58 | ||
59 | #if !defined (strchr) && !defined (__STDC__) | |
60 | extern char *strchr (), *strrchr (); | |
61 | #endif /* !strchr && !__STDC__ */ | |
62 | ||
63 | /* Global and pseudo-global variables and functions | |
64 | imported from readline.c. */ | |
65 | extern char *rl_prompt; | |
66 | extern int readline_echoing_p; | |
67 | ||
68 | extern int _rl_output_meta_chars; | |
69 | extern int _rl_horizontal_scroll_mode; | |
70 | extern int _rl_mark_modified_lines; | |
71 | extern int _rl_prefer_visible_bell; | |
72 | ||
73 | /* Variables and functions imported from terminal.c */ | |
74 | extern void _rl_output_some_chars (); | |
75 | #ifdef _MINIX | |
76 | extern void _rl_output_character_function (); | |
77 | #else | |
78 | extern int _rl_output_character_function (); | |
79 | #endif | |
80 | extern int _rl_backspace (); | |
81 | ||
82 | extern char *term_clreol, *term_clrpag; | |
83 | extern char *term_im, *term_ic, *term_ei, *term_DC; | |
84 | extern char *term_up, *term_dc, *term_cr, *term_IC; | |
85 | extern int screenheight, screenwidth, screenchars; | |
86 | extern int terminal_can_insert, _rl_term_autowrap; | |
87 | ||
88 | /* Pseudo-global functions (local to the readline library) exported | |
89 | by this file. */ | |
90 | void _rl_move_cursor_relative (), _rl_output_some_chars (); | |
91 | void _rl_move_vert (); | |
92 | void _rl_clear_to_eol (), _rl_clear_screen (); | |
93 | ||
94 | static void update_line (), space_to_eol (); | |
95 | static void delete_chars (), insert_some_chars (); | |
96 | static void cr (); | |
97 | ||
98 | static int *inv_lbreaks, *vis_lbreaks; | |
99 | ||
100 | extern char *xmalloc (), *xrealloc (); | |
101 | ||
102 | /* Heuristic used to decide whether it is faster to move from CUR to NEW | |
103 | by backing up or outputting a carriage return and moving forward. */ | |
104 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) | |
105 | ||
106 | /* **************************************************************** */ | |
107 | /* */ | |
108 | /* Display stuff */ | |
109 | /* */ | |
110 | /* **************************************************************** */ | |
111 | ||
112 | /* This is the stuff that is hard for me. I never seem to write good | |
113 | display routines in C. Let's see how I do this time. */ | |
114 | ||
115 | /* (PWP) Well... Good for a simple line updater, but totally ignores | |
116 | the problems of input lines longer than the screen width. | |
117 | ||
118 | update_line and the code that calls it makes a multiple line, | |
119 | automatically wrapping line update. Careful attention needs | |
120 | to be paid to the vertical position variables. */ | |
121 | ||
122 | /* Keep two buffers; one which reflects the current contents of the | |
123 | screen, and the other to draw what we think the new contents should | |
124 | be. Then compare the buffers, and make whatever changes to the | |
125 | screen itself that we should. Finally, make the buffer that we | |
126 | just drew into be the one which reflects the current contents of the | |
127 | screen, and place the cursor where it belongs. | |
128 | ||
129 | Commands that want to can fix the display themselves, and then let | |
130 | this function know that the display has been fixed by setting the | |
131 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ | |
132 | ||
133 | /* Application-specific redisplay function. */ | |
134 | VFunction *rl_redisplay_function = rl_redisplay; | |
135 | ||
136 | /* Global variables declared here. */ | |
137 | /* What YOU turn on when you have handled all redisplay yourself. */ | |
138 | int rl_display_fixed = 0; | |
139 | ||
140 | int _rl_suppress_redisplay = 0; | |
141 | ||
142 | /* The stuff that gets printed out before the actual text of the line. | |
143 | This is usually pointing to rl_prompt. */ | |
144 | char *rl_display_prompt = (char *)NULL; | |
145 | ||
146 | /* Pseudo-global variables declared here. */ | |
147 | /* The visible cursor position. If you print some text, adjust this. */ | |
148 | int _rl_last_c_pos = 0; | |
149 | int _rl_last_v_pos = 0; | |
150 | ||
151 | /* Number of lines currently on screen minus 1. */ | |
152 | int _rl_vis_botlin = 0; | |
153 | ||
154 | /* Variables used only in this file. */ | |
155 | /* The last left edge of text that was displayed. This is used when | |
156 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ | |
157 | static int last_lmargin; | |
158 | ||
159 | /* The line display buffers. One is the line currently displayed on | |
160 | the screen. The other is the line about to be displayed. */ | |
161 | static char *visible_line = (char *)NULL; | |
162 | static char *invisible_line = (char *)NULL; | |
163 | ||
164 | /* A buffer for `modeline' messages. */ | |
165 | static char msg_buf[128]; | |
166 | ||
167 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ | |
168 | static int forced_display; | |
169 | ||
170 | /* Default and initial buffer size. Can grow. */ | |
171 | static int line_size = 1024; | |
172 | ||
173 | static char *local_prompt, *local_prompt_prefix; | |
174 | static int visible_length, prefix_length; | |
175 | ||
176 | /* The number of invisible characters in the line currently being | |
177 | displayed on the screen. */ | |
178 | static int visible_wrap_offset; | |
179 | ||
180 | /* static so it can be shared between rl_redisplay and update_line */ | |
181 | static int wrap_offset; | |
182 | ||
183 | /* The index of the last invisible_character in the prompt string. */ | |
184 | static int last_invisible; | |
185 | ||
186 | /* The length (buffer offset) of the first line of the last (possibly | |
187 | multi-line) buffer displayed on the screen. */ | |
188 | static int visible_first_line_len; | |
189 | ||
190 | /* Expand the prompt string S and return the number of visible | |
191 | characters in *LP, if LP is not null. This is currently more-or-less | |
192 | a placeholder for expansion. LIP, if non-null is a place to store the | |
193 | index of the last invisible character in ther eturned string. */ | |
194 | ||
195 | /* Current implementation: | |
196 | \001 (^A) start non-visible characters | |
197 | \002 (^B) end non-visible characters | |
198 | all characters except \001 and \002 (following a \001) are copied to | |
199 | the returned string; all characters except those between \001 and | |
200 | \002 are assumed to be `visible'. */ | |
201 | ||
202 | static char * | |
203 | expand_prompt (pmt, lp, lip) | |
204 | char *pmt; | |
205 | int *lp, *lip; | |
206 | { | |
207 | char *r, *ret, *p; | |
208 | int l, rl, last, ignoring; | |
209 | ||
210 | /* Short-circuit if we can. */ | |
211 | if (strchr (pmt, RL_PROMPT_START_IGNORE) == 0) | |
212 | { | |
213 | r = savestring (pmt); | |
214 | if (lp) | |
215 | *lp = strlen (r); | |
216 | return r; | |
217 | } | |
218 | ||
219 | l = strlen (pmt); | |
220 | r = ret = xmalloc (l + 1); | |
221 | ||
222 | for (rl = ignoring = last = 0, p = pmt; p && *p; p++) | |
223 | { | |
224 | /* This code strips the invisible character string markers | |
225 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ | |
226 | if (*p == RL_PROMPT_START_IGNORE) | |
227 | { | |
228 | ignoring++; | |
229 | continue; | |
230 | } | |
231 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) | |
232 | { | |
233 | ignoring = 0; | |
234 | last = r - ret - 1; | |
235 | continue; | |
236 | } | |
237 | else | |
238 | { | |
239 | *r++ = *p; | |
240 | if (!ignoring) | |
241 | rl++; | |
242 | } | |
243 | } | |
244 | ||
245 | *r = '\0'; | |
246 | if (lp) | |
247 | *lp = rl; | |
248 | if (lip) | |
249 | *lip = last; | |
250 | return ret; | |
251 | } | |
252 | ||
253 | /* | |
254 | * Expand the prompt string into the various display components, if | |
255 | * necessary. | |
256 | * | |
257 | * local_prompt = expanded last line of string in rl_display_prompt | |
258 | * (portion after the final newline) | |
259 | * local_prompt_prefix = portion before last newline of rl_display_prompt, | |
260 | * expanded via expand_prompt | |
261 | * visible_length = number of visible characters in local_prompt | |
262 | * prefix_length = number of visible characters in local_prompt_prefix | |
263 | * | |
264 | * This function is called once per call to readline(). It may also be | |
265 | * called arbitrarily to expand the primary prompt. | |
266 | * | |
267 | * The return value is the number of visible characters on the last line | |
268 | * of the (possibly multi-line) prompt. | |
269 | */ | |
270 | int | |
271 | rl_expand_prompt (prompt) | |
272 | char *prompt; | |
273 | { | |
274 | char *p, *t; | |
275 | int c; | |
276 | ||
277 | /* Clear out any saved values. */ | |
278 | if (local_prompt) | |
279 | free (local_prompt); | |
280 | if (local_prompt_prefix) | |
281 | free (local_prompt_prefix); | |
282 | local_prompt = local_prompt_prefix = (char *)0; | |
283 | last_invisible = 0; | |
284 | ||
285 | if (prompt == 0 || *prompt == 0) | |
286 | return (0); | |
287 | ||
288 | p = strrchr (prompt, '\n'); | |
289 | if (!p) | |
290 | { | |
291 | /* The prompt is only one line. */ | |
292 | local_prompt = expand_prompt (prompt, &visible_length, &last_invisible); | |
293 | local_prompt_prefix = (char *)0; | |
294 | return (visible_length); | |
295 | } | |
296 | else | |
297 | { | |
298 | /* The prompt spans multiple lines. */ | |
299 | t = ++p; | |
300 | local_prompt = expand_prompt (p, &visible_length, &last_invisible); | |
301 | c = *t; *t = '\0'; | |
302 | /* The portion of the prompt string up to and including the | |
303 | final newline is now null-terminated. */ | |
304 | local_prompt_prefix = expand_prompt (prompt, &prefix_length, (int *)NULL); | |
305 | *t = c; | |
306 | return (prefix_length); | |
307 | } | |
308 | } | |
309 | ||
310 | /* Basic redisplay algorithm. */ | |
311 | void | |
312 | rl_redisplay () | |
313 | { | |
314 | register int in, out, c, linenum, cursor_linenum; | |
315 | register char *line; | |
316 | int c_pos, inv_botlin, lb_botlin, lb_linenum; | |
317 | int newlines, lpos, temp; | |
318 | char *prompt_this_line; | |
319 | ||
320 | if (!readline_echoing_p) | |
321 | return; | |
322 | ||
323 | if (!rl_display_prompt) | |
324 | rl_display_prompt = ""; | |
325 | ||
326 | if (invisible_line == 0) | |
327 | { | |
328 | visible_line = xmalloc (line_size); | |
329 | invisible_line = xmalloc (line_size); | |
330 | for (in = 0; in < line_size; in++) | |
331 | { | |
332 | visible_line[in] = 0; | |
333 | invisible_line[in] = 1; | |
334 | } | |
335 | ||
336 | /* should be enough, but then again, this is just for testing. */ | |
337 | inv_lbreaks = (int *)malloc (256 * sizeof (int)); | |
338 | vis_lbreaks = (int *)malloc (256 * sizeof (int)); | |
339 | inv_lbreaks[0] = vis_lbreaks[0] = 0; | |
340 | ||
341 | rl_on_new_line (); | |
342 | } | |
343 | ||
344 | /* Draw the line into the buffer. */ | |
345 | c_pos = -1; | |
346 | ||
347 | line = invisible_line; | |
348 | out = inv_botlin = 0; | |
349 | ||
350 | /* Mark the line as modified or not. We only do this for history | |
351 | lines. */ | |
352 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) | |
353 | { | |
354 | line[out++] = '*'; | |
355 | line[out] = '\0'; | |
356 | } | |
357 | ||
358 | /* If someone thought that the redisplay was handled, but the currently | |
359 | visible line has a different modification state than the one about | |
360 | to become visible, then correct the caller's misconception. */ | |
361 | if (visible_line[0] != invisible_line[0]) | |
362 | rl_display_fixed = 0; | |
363 | ||
364 | /* If the prompt to be displayed is the `primary' readline prompt (the | |
365 | one passed to readline()), use the values we have already expanded. | |
366 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the | |
367 | number of non-visible characters in the prompt string. */ | |
368 | if (rl_display_prompt == rl_prompt || local_prompt) | |
369 | { | |
370 | int local_len = local_prompt ? strlen (local_prompt) : 0; | |
371 | if (local_prompt_prefix && forced_display) | |
372 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); | |
373 | ||
374 | if (local_len > 0) | |
375 | { | |
376 | strncpy (line + out, local_prompt, local_len); | |
377 | out += local_len; | |
378 | } | |
379 | line[out] = '\0'; | |
380 | wrap_offset = local_len - visible_length; | |
381 | } | |
382 | else | |
383 | { | |
384 | int pmtlen; | |
385 | prompt_this_line = strrchr (rl_display_prompt, '\n'); | |
386 | if (!prompt_this_line) | |
387 | prompt_this_line = rl_display_prompt; | |
388 | else | |
389 | { | |
390 | prompt_this_line++; | |
391 | if (forced_display) | |
392 | { | |
393 | _rl_output_some_chars (rl_display_prompt, prompt_this_line - rl_display_prompt); | |
394 | /* Make sure we are at column zero even after a newline, | |
395 | regardless of the state of terminal output processing. */ | |
396 | if (prompt_this_line[-2] != '\r') | |
397 | cr (); | |
398 | } | |
399 | } | |
400 | ||
401 | pmtlen = strlen (prompt_this_line); | |
402 | strncpy (line + out, prompt_this_line, pmtlen); | |
403 | out += pmtlen; | |
404 | line[out] = '\0'; | |
405 | wrap_offset = 0; | |
406 | } | |
407 | ||
408 | #define CHECK_LPOS() \ | |
409 | do { \ | |
410 | lpos++; \ | |
411 | if (lpos >= screenwidth) \ | |
412 | { \ | |
413 | inv_lbreaks[++newlines] = out; \ | |
414 | lpos = 0; \ | |
415 | } \ | |
416 | } while (0) | |
417 | ||
418 | /* inv_lbreaks[i] is where line i starts in the buffer. */ | |
419 | inv_lbreaks[newlines = 0] = 0; | |
420 | lpos = out - wrap_offset; | |
421 | ||
422 | /* XXX - what if lpos is already >= screenwidth before we start drawing the | |
423 | contents of the command line? */ | |
424 | while (lpos >= screenwidth) | |
425 | { | |
426 | #if 0 | |
427 | temp = ((newlines + 1) * screenwidth) - ((newlines == 0) ? wrap_offset : 0); | |
428 | #else | |
429 | /* XXX - possible fix from Darin Johnson <darin@acuson.com> for prompt | |
430 | string with invisible characters that is longer than the screen | |
431 | width. */ | |
432 | temp = ((newlines + 1) * screenwidth) + ((newlines == 0) ? wrap_offset : 0); | |
433 | #endif | |
434 | inv_lbreaks[++newlines] = temp; | |
435 | lpos -= screenwidth; | |
436 | } | |
437 | ||
438 | lb_linenum = 0; | |
439 | for (in = 0; in < rl_end; in++) | |
440 | { | |
441 | c = (unsigned char)rl_line_buffer[in]; | |
442 | ||
443 | if (out + 8 >= line_size) /* XXX - 8 for \t */ | |
444 | { | |
445 | line_size *= 2; | |
446 | visible_line = xrealloc (visible_line, line_size); | |
447 | invisible_line = xrealloc (invisible_line, line_size); | |
448 | line = invisible_line; | |
449 | } | |
450 | ||
451 | if (in == rl_point) | |
452 | { | |
453 | c_pos = out; | |
454 | lb_linenum = newlines; | |
455 | } | |
456 | ||
457 | if (META_CHAR (c)) | |
458 | { | |
459 | if (_rl_output_meta_chars == 0) | |
460 | { | |
461 | sprintf (line + out, "\\%o", c); | |
462 | ||
463 | if (lpos + 4 >= screenwidth) | |
464 | { | |
465 | temp = screenwidth - lpos; | |
466 | inv_lbreaks[++newlines] = out + temp; | |
467 | lpos = 4 - temp; | |
468 | } | |
469 | else | |
470 | lpos += 4; | |
471 | ||
472 | out += 4; | |
473 | } | |
474 | else | |
475 | { | |
476 | line[out++] = c; | |
477 | CHECK_LPOS(); | |
478 | } | |
479 | } | |
480 | #if defined (DISPLAY_TABS) | |
481 | else if (c == '\t') | |
482 | { | |
483 | register int temp, newout; | |
484 | newout = (out | (int)7) + 1; | |
485 | temp = newout - out; | |
486 | if (lpos + temp >= screenwidth) | |
487 | { | |
488 | register int temp2; | |
489 | temp2 = screenwidth - lpos; | |
490 | inv_lbreaks[++newlines] = out + temp2; | |
491 | lpos = temp - temp2; | |
492 | while (out < newout) | |
493 | line[out++] = ' '; | |
494 | } | |
495 | else | |
496 | { | |
497 | while (out < newout) | |
498 | line[out++] = ' '; | |
499 | lpos += temp; | |
500 | } | |
501 | } | |
502 | #endif | |
503 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && term_up && *term_up) | |
504 | { | |
505 | line[out++] = '\0'; /* XXX - sentinel */ | |
506 | inv_lbreaks[++newlines] = out; | |
507 | lpos = 0; | |
508 | } | |
509 | else if (CTRL_CHAR (c) || c == RUBOUT) | |
510 | { | |
511 | line[out++] = '^'; | |
512 | CHECK_LPOS(); | |
513 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
514 | CHECK_LPOS(); | |
515 | } | |
516 | else | |
517 | { | |
518 | line[out++] = c; | |
519 | CHECK_LPOS(); | |
520 | } | |
521 | } | |
522 | line[out] = '\0'; | |
523 | if (c_pos < 0) | |
524 | { | |
525 | c_pos = out; | |
526 | lb_linenum = newlines; | |
527 | } | |
528 | ||
529 | inv_botlin = lb_botlin = newlines; | |
530 | inv_lbreaks[newlines+1] = out; | |
531 | cursor_linenum = lb_linenum; | |
532 | ||
533 | /* C_POS == position in buffer where cursor should be placed. */ | |
534 | ||
535 | /* PWP: now is when things get a bit hairy. The visible and invisible | |
536 | line buffers are really multiple lines, which would wrap every | |
537 | (screenwidth - 1) characters. Go through each in turn, finding | |
538 | the changed region and updating it. The line order is top to bottom. */ | |
539 | ||
540 | /* If we can move the cursor up and down, then use multiple lines, | |
541 | otherwise, let long lines display in a single terminal line, and | |
542 | horizontally scroll it. */ | |
543 | ||
544 | if (_rl_horizontal_scroll_mode == 0 && term_up && *term_up) | |
545 | { | |
546 | int nleft, pos, changed_screen_line; | |
547 | ||
548 | if (!rl_display_fixed || forced_display) | |
549 | { | |
550 | forced_display = 0; | |
551 | ||
552 | /* If we have more than a screenful of material to display, then | |
553 | only display a screenful. We should display the last screen, | |
554 | not the first. */ | |
555 | if (out >= screenchars) | |
556 | out = screenchars - 1; | |
557 | ||
558 | /* The first line is at character position 0 in the buffer. The | |
559 | second and subsequent lines start at inv_lbreaks[N], offset by | |
560 | OFFSET (which has already been calculated above). */ | |
561 | ||
562 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) | |
563 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) | |
564 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) | |
565 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) | |
566 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) | |
567 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) | |
568 | ||
569 | /* For each line in the buffer, do the updating display. */ | |
570 | for (linenum = 0; linenum <= inv_botlin; linenum++) | |
571 | { | |
572 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, | |
573 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); | |
574 | ||
575 | /* If this is the line with the prompt, we might need to | |
576 | compensate for invisible characters in the new line. Do | |
577 | this only if there is not more than one new line (which | |
578 | implies that we completely overwrite the old visible line) | |
579 | and the new line is shorter than the old. Make sure we are | |
580 | at the end of the new line before clearing. */ | |
581 | if (linenum == 0 && | |
582 | inv_botlin == 0 && _rl_last_c_pos == out && | |
583 | (wrap_offset > visible_wrap_offset) && | |
584 | (_rl_last_c_pos < visible_first_line_len)) | |
585 | { | |
586 | nleft = screenwidth + wrap_offset - _rl_last_c_pos; | |
587 | if (nleft) | |
588 | _rl_clear_to_eol (nleft); | |
589 | } | |
590 | ||
591 | /* Since the new first line is now visible, save its length. */ | |
592 | if (linenum == 0) | |
593 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; | |
594 | } | |
595 | ||
596 | /* We may have deleted some lines. If so, clear the left over | |
597 | blank ones at the bottom out. */ | |
598 | if (_rl_vis_botlin > inv_botlin) | |
599 | { | |
600 | char *tt; | |
601 | for (; linenum <= _rl_vis_botlin; linenum++) | |
602 | { | |
603 | tt = VIS_CHARS (linenum); | |
604 | _rl_move_vert (linenum); | |
605 | _rl_move_cursor_relative (0, tt); | |
606 | _rl_clear_to_eol | |
607 | ((linenum == _rl_vis_botlin) ? strlen (tt) : screenwidth); | |
608 | } | |
609 | } | |
610 | _rl_vis_botlin = inv_botlin; | |
611 | ||
612 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a | |
613 | different screen line during this redisplay. */ | |
614 | changed_screen_line = _rl_last_v_pos != cursor_linenum; | |
615 | if (changed_screen_line) | |
616 | { | |
617 | _rl_move_vert (cursor_linenum); | |
618 | /* If we moved up to the line with the prompt using term_up, | |
619 | the physical cursor position on the screen stays the same, | |
620 | but the buffer position needs to be adjusted to account | |
621 | for invisible characters. */ | |
622 | if (cursor_linenum == 0 && wrap_offset) | |
623 | _rl_last_c_pos += wrap_offset; | |
624 | } | |
625 | ||
626 | /* We have to reprint the prompt if it contains invisible | |
627 | characters, since it's not generally OK to just reprint | |
628 | the characters from the current cursor position. But we | |
629 | only need to reprint it if the cursor is before the last | |
630 | invisible character in the prompt string. */ | |
631 | nleft = visible_length + wrap_offset; | |
632 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && | |
633 | _rl_last_c_pos <= last_invisible && local_prompt) | |
634 | { | |
771578d1 SS |
635 | #if defined (__MSDOS__) |
636 | putc ('\r', rl_outstream); | |
637 | #else | |
d60d9f65 SS |
638 | if (term_cr) |
639 | tputs (term_cr, 1, _rl_output_character_function); | |
771578d1 | 640 | #endif |
d60d9f65 SS |
641 | _rl_output_some_chars (local_prompt, nleft); |
642 | _rl_last_c_pos = nleft; | |
643 | } | |
644 | ||
645 | /* Where on that line? And where does that line start | |
646 | in the buffer? */ | |
647 | pos = inv_lbreaks[cursor_linenum]; | |
648 | /* nleft == number of characters in the line buffer between the | |
649 | start of the line and the cursor position. */ | |
650 | nleft = c_pos - pos; | |
651 | ||
652 | /* Since _rl_backspace() doesn't know about invisible characters in the | |
653 | prompt, and there's no good way to tell it, we compensate for | |
654 | those characters here and call _rl_backspace() directly. */ | |
655 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) | |
656 | { | |
657 | _rl_backspace (_rl_last_c_pos - nleft); | |
658 | _rl_last_c_pos = nleft; | |
659 | } | |
660 | ||
661 | if (nleft != _rl_last_c_pos) | |
662 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); | |
663 | } | |
664 | } | |
665 | else /* Do horizontal scrolling. */ | |
666 | { | |
667 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) | |
668 | int lmargin, ndisp, nleft, phys_c_pos, t; | |
669 | ||
670 | /* Always at top line. */ | |
671 | _rl_last_v_pos = 0; | |
672 | ||
673 | /* Compute where in the buffer the displayed line should start. This | |
674 | will be LMARGIN. */ | |
675 | ||
676 | /* The number of characters that will be displayed before the cursor. */ | |
677 | ndisp = c_pos - wrap_offset; | |
678 | nleft = visible_length + wrap_offset; | |
679 | /* Where the new cursor position will be on the screen. This can be | |
680 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ | |
681 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); | |
682 | t = screenwidth / 3; | |
683 | ||
684 | /* If the number of characters had already exceeded the screenwidth, | |
685 | last_lmargin will be > 0. */ | |
686 | ||
687 | /* If the number of characters to be displayed is more than the screen | |
688 | width, compute the starting offset so that the cursor is about | |
689 | two-thirds of the way across the screen. */ | |
690 | if (phys_c_pos > screenwidth - 2) | |
691 | { | |
692 | lmargin = c_pos - (2 * t); | |
693 | if (lmargin < 0) | |
694 | lmargin = 0; | |
695 | /* If the left margin would be in the middle of a prompt with | |
696 | invisible characters, don't display the prompt at all. */ | |
697 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
698 | lmargin = nleft; | |
699 | } | |
700 | else if (ndisp < screenwidth - 2) /* XXX - was -1 */ | |
701 | lmargin = 0; | |
702 | else if (phys_c_pos < 1) | |
703 | { | |
704 | /* If we are moving back towards the beginning of the line and | |
705 | the last margin is no longer correct, compute a new one. */ | |
706 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ | |
707 | if (wrap_offset && lmargin > 0 && lmargin < nleft) | |
708 | lmargin = nleft; | |
709 | } | |
710 | else | |
711 | lmargin = last_lmargin; | |
712 | ||
713 | /* If the first character on the screen isn't the first character | |
714 | in the display line, indicate this with a special character. */ | |
715 | if (lmargin > 0) | |
716 | line[lmargin] = '<'; | |
717 | ||
718 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass | |
719 | the whole line, indicate that with a special characters at the | |
720 | right edge of the screen. If LMARGIN is 0, we need to take the | |
721 | wrap offset into account. */ | |
722 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + screenwidth; | |
723 | if (t < out) | |
724 | line[t - 1] = '>'; | |
725 | ||
726 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) | |
727 | { | |
728 | forced_display = 0; | |
729 | update_line (&visible_line[last_lmargin], | |
730 | &invisible_line[lmargin], | |
731 | 0, | |
732 | screenwidth + visible_wrap_offset, | |
733 | screenwidth + (lmargin ? 0 : wrap_offset), | |
734 | 0); | |
735 | ||
736 | /* If the visible new line is shorter than the old, but the number | |
737 | of invisible characters is greater, and we are at the end of | |
738 | the new line, we need to clear to eol. */ | |
739 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); | |
740 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && | |
741 | (_rl_last_c_pos == out) && | |
742 | t < visible_first_line_len) | |
743 | { | |
744 | nleft = screenwidth - t; | |
745 | _rl_clear_to_eol (nleft); | |
746 | } | |
747 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); | |
748 | if (visible_first_line_len > screenwidth) | |
749 | visible_first_line_len = screenwidth; | |
750 | ||
751 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); | |
752 | last_lmargin = lmargin; | |
753 | } | |
754 | } | |
755 | fflush (rl_outstream); | |
756 | ||
757 | /* Swap visible and non-visible lines. */ | |
758 | { | |
759 | char *temp = visible_line; | |
760 | int *itemp = vis_lbreaks; | |
761 | visible_line = invisible_line; | |
762 | invisible_line = temp; | |
763 | vis_lbreaks = inv_lbreaks; | |
764 | inv_lbreaks = itemp; | |
765 | rl_display_fixed = 0; | |
766 | /* If we are displaying on a single line, and last_lmargin is > 0, we | |
767 | are not displaying any invisible characters, so set visible_wrap_offset | |
768 | to 0. */ | |
769 | if (_rl_horizontal_scroll_mode && last_lmargin) | |
770 | visible_wrap_offset = 0; | |
771 | else | |
772 | visible_wrap_offset = wrap_offset; | |
773 | } | |
774 | } | |
775 | ||
776 | /* PWP: update_line() is based on finding the middle difference of each | |
777 | line on the screen; vis: | |
778 | ||
779 | /old first difference | |
780 | /beginning of line | /old last same /old EOL | |
781 | v v v v | |
782 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as | |
783 | new: eddie> Oh, my little buggy says to me, as lurgid as | |
784 | ^ ^ ^ ^ | |
785 | \beginning of line | \new last same \new end of line | |
786 | \new first difference | |
787 | ||
788 | All are character pointers for the sake of speed. Special cases for | |
789 | no differences, as well as for end of line additions must be handeled. | |
790 | ||
791 | Could be made even smarter, but this works well enough */ | |
792 | static void | |
793 | update_line (old, new, current_line, omax, nmax, inv_botlin) | |
794 | register char *old, *new; | |
795 | int current_line, omax, nmax, inv_botlin; | |
796 | { | |
797 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; | |
798 | int temp, lendiff, wsatend, od, nd; | |
799 | int current_invis_chars; | |
800 | ||
801 | /* If we're at the right edge of a terminal that supports xn, we're | |
802 | ready to wrap around, so do so. This fixes problems with knowing | |
803 | the exact cursor position and cut-and-paste with certain terminal | |
804 | emulators. In this calculation, TEMP is the physical screen | |
805 | position of the cursor. */ | |
806 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
807 | if (temp == screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode | |
808 | && _rl_last_v_pos == current_line - 1) | |
809 | { | |
810 | if (new[0]) | |
811 | putc (new[0], rl_outstream); | |
812 | else | |
813 | putc (' ', rl_outstream); | |
814 | _rl_last_c_pos = 1; /* XXX */ | |
815 | _rl_last_v_pos++; | |
816 | if (old[0] && new[0]) | |
817 | old[0] = new[0]; | |
818 | } | |
819 | ||
820 | /* Find first difference. */ | |
821 | for (ofd = old, nfd = new; | |
822 | (ofd - old < omax) && *ofd && (*ofd == *nfd); | |
823 | ofd++, nfd++) | |
824 | ; | |
825 | ||
826 | /* Move to the end of the screen line. ND and OD are used to keep track | |
827 | of the distance between ne and new and oe and old, respectively, to | |
828 | move a subtraction out of each loop. */ | |
829 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); | |
830 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); | |
831 | ||
832 | /* If no difference, continue to next line. */ | |
833 | if (ofd == oe && nfd == ne) | |
834 | return; | |
835 | ||
836 | wsatend = 1; /* flag for trailing whitespace */ | |
837 | ols = oe - 1; /* find last same */ | |
838 | nls = ne - 1; | |
839 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) | |
840 | { | |
841 | if (*ols != ' ') | |
842 | wsatend = 0; | |
843 | ols--; | |
844 | nls--; | |
845 | } | |
846 | ||
847 | if (wsatend) | |
848 | { | |
849 | ols = oe; | |
850 | nls = ne; | |
851 | } | |
852 | else if (*ols != *nls) | |
853 | { | |
854 | if (*ols) /* don't step past the NUL */ | |
855 | ols++; | |
856 | if (*nls) | |
857 | nls++; | |
858 | } | |
859 | ||
860 | /* count of invisible characters in the current invisible line. */ | |
861 | current_invis_chars = W_OFFSET (current_line, wrap_offset); | |
862 | if (_rl_last_v_pos != current_line) | |
863 | { | |
864 | _rl_move_vert (current_line); | |
865 | if (current_line == 0 && visible_wrap_offset) | |
866 | _rl_last_c_pos += visible_wrap_offset; | |
867 | } | |
868 | ||
869 | /* If this is the first line and there are invisible characters in the | |
870 | prompt string, and the prompt string has not changed, and the current | |
871 | cursor position is before the last invisible character in the prompt, | |
872 | and the index of the character to move to is past the end of the prompt | |
873 | string, then redraw the entire prompt string. We can only do this | |
874 | reliably if the terminal supports a `cr' capability. | |
875 | ||
876 | This is not an efficiency hack -- there is a problem with redrawing | |
877 | portions of the prompt string if they contain terminal escape | |
878 | sequences (like drawing the `unbold' sequence without a corresponding | |
879 | `bold') that manifests itself on certain terminals. */ | |
880 | ||
881 | lendiff = local_prompt ? strlen (local_prompt) : 0; | |
882 | od = ofd - old; /* index of first difference in visible line */ | |
883 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
884 | term_cr && lendiff > visible_length && _rl_last_c_pos > 0 && | |
885 | od > lendiff && _rl_last_c_pos < last_invisible) | |
886 | { | |
771578d1 SS |
887 | #if defined (__MSDOS__) |
888 | putc ('\r', rl_outstream); | |
889 | #else | |
d60d9f65 | 890 | tputs (term_cr, 1, _rl_output_character_function); |
771578d1 | 891 | #endif /* !__MSDOS__ */ |
d60d9f65 SS |
892 | _rl_output_some_chars (local_prompt, lendiff); |
893 | _rl_last_c_pos = lendiff; | |
894 | } | |
895 | ||
896 | _rl_move_cursor_relative (od, old); | |
897 | ||
898 | /* if (len (new) > len (old)) */ | |
899 | lendiff = (nls - nfd) - (ols - ofd); | |
900 | ||
901 | /* If we are changing the number of invisible characters in a line, and | |
902 | the spot of first difference is before the end of the invisible chars, | |
903 | lendiff needs to be adjusted. */ | |
904 | if (current_line == 0 && !_rl_horizontal_scroll_mode && | |
905 | current_invis_chars != visible_wrap_offset) | |
906 | { | |
907 | temp = visible_wrap_offset - current_invis_chars; | |
908 | lendiff += temp; | |
909 | } | |
910 | ||
911 | /* Insert (diff (len (old), len (new)) ch. */ | |
912 | temp = ne - nfd; | |
913 | if (lendiff > 0) | |
914 | { | |
915 | /* Non-zero if we're increasing the number of lines. */ | |
916 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; | |
917 | /* Sometimes it is cheaper to print the characters rather than | |
918 | use the terminal's capabilities. If we're growing the number | |
919 | of lines, make sure we actually cause the new line to wrap | |
920 | around on auto-wrapping terminals. */ | |
921 | if (terminal_can_insert && ((2 * temp) >= lendiff || term_IC) && (!_rl_term_autowrap || !gl)) | |
922 | { | |
923 | /* If lendiff > visible_length and _rl_last_c_pos == 0 and | |
924 | _rl_horizontal_scroll_mode == 1, inserting the characters with | |
925 | term_IC or term_ic will screw up the screen because of the | |
926 | invisible characters. We need to just draw them. */ | |
927 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || | |
928 | lendiff <= visible_length || !current_invis_chars)) | |
929 | { | |
930 | insert_some_chars (nfd, lendiff); | |
931 | _rl_last_c_pos += lendiff; | |
932 | } | |
933 | else if (*ols == 0) | |
934 | { | |
935 | /* At the end of a line the characters do not have to | |
936 | be "inserted". They can just be placed on the screen. */ | |
937 | /* However, this screws up the rest of this block, which | |
938 | assumes you've done the insert because you can. */ | |
939 | _rl_output_some_chars (nfd, lendiff); | |
940 | _rl_last_c_pos += lendiff; | |
941 | } | |
942 | else | |
943 | { | |
944 | /* We have horizontal scrolling and we are not inserting at | |
945 | the end. We have invisible characters in this line. This | |
946 | is a dumb update. */ | |
947 | _rl_output_some_chars (nfd, temp); | |
948 | _rl_last_c_pos += temp; | |
949 | return; | |
950 | } | |
951 | /* Copy (new) chars to screen from first diff to last match. */ | |
952 | temp = nls - nfd; | |
953 | if ((temp - lendiff) > 0) | |
954 | { | |
955 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); | |
956 | _rl_last_c_pos += temp - lendiff; | |
957 | } | |
958 | } | |
959 | else | |
960 | { | |
961 | /* cannot insert chars, write to EOL */ | |
962 | _rl_output_some_chars (nfd, temp); | |
963 | _rl_last_c_pos += temp; | |
964 | } | |
965 | } | |
966 | else /* Delete characters from line. */ | |
967 | { | |
968 | /* If possible and inexpensive to use terminal deletion, then do so. */ | |
969 | if (term_dc && (2 * temp) >= -lendiff) | |
970 | { | |
971 | /* If all we're doing is erasing the invisible characters in the | |
972 | prompt string, don't bother. It screws up the assumptions | |
973 | about what's on the screen. */ | |
974 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && | |
975 | -lendiff == visible_wrap_offset) | |
976 | lendiff = 0; | |
977 | ||
978 | if (lendiff) | |
979 | delete_chars (-lendiff); /* delete (diff) characters */ | |
980 | ||
981 | /* Copy (new) chars to screen from first diff to last match */ | |
982 | temp = nls - nfd; | |
983 | if (temp > 0) | |
984 | { | |
985 | _rl_output_some_chars (nfd, temp); | |
986 | _rl_last_c_pos += temp; | |
987 | } | |
988 | } | |
989 | /* Otherwise, print over the existing material. */ | |
990 | else | |
991 | { | |
992 | if (temp > 0) | |
993 | { | |
994 | _rl_output_some_chars (nfd, temp); | |
995 | _rl_last_c_pos += temp; | |
996 | } | |
997 | lendiff = (oe - old) - (ne - new); | |
998 | if (_rl_term_autowrap && current_line < inv_botlin) | |
999 | space_to_eol (lendiff); | |
1000 | else | |
1001 | _rl_clear_to_eol (lendiff); | |
1002 | } | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | /* Tell the update routines that we have moved onto a new (empty) line. */ | |
1007 | int | |
1008 | rl_on_new_line () | |
1009 | { | |
1010 | if (visible_line) | |
1011 | visible_line[0] = '\0'; | |
1012 | ||
1013 | _rl_last_c_pos = _rl_last_v_pos = 0; | |
1014 | _rl_vis_botlin = last_lmargin = 0; | |
1015 | if (vis_lbreaks) | |
1016 | vis_lbreaks[0] = vis_lbreaks[1] = 0; | |
1017 | visible_wrap_offset = 0; | |
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | /* Actually update the display, period. */ | |
1022 | int | |
1023 | rl_forced_update_display () | |
1024 | { | |
1025 | if (visible_line) | |
1026 | { | |
1027 | register char *temp = visible_line; | |
1028 | ||
1029 | while (*temp) | |
1030 | *temp++ = '\0'; | |
1031 | } | |
1032 | rl_on_new_line (); | |
1033 | forced_display++; | |
1034 | (*rl_redisplay_function) (); | |
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. | |
1039 | DATA is the contents of the screen line of interest; i.e., where | |
1040 | the movement is being done. */ | |
1041 | void | |
1042 | _rl_move_cursor_relative (new, data) | |
1043 | int new; | |
1044 | char *data; | |
1045 | { | |
1046 | register int i; | |
1047 | ||
1048 | /* If we don't have to do anything, then return. */ | |
1049 | if (_rl_last_c_pos == new) return; | |
1050 | ||
1051 | /* It may be faster to output a CR, and then move forwards instead | |
1052 | of moving backwards. */ | |
1053 | /* i == current physical cursor position. */ | |
1054 | i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); | |
1055 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || | |
1056 | (_rl_term_autowrap && i == screenwidth)) | |
1057 | { | |
1058 | #if defined (__MSDOS__) | |
1059 | putc ('\r', rl_outstream); | |
1060 | #else | |
1061 | tputs (term_cr, 1, _rl_output_character_function); | |
1062 | #endif /* !__MSDOS__ */ | |
1063 | _rl_last_c_pos = 0; | |
1064 | } | |
1065 | ||
1066 | if (_rl_last_c_pos < new) | |
1067 | { | |
1068 | /* Move the cursor forward. We do it by printing the command | |
1069 | to move the cursor forward if there is one, else print that | |
1070 | portion of the output buffer again. Which is cheaper? */ | |
1071 | ||
1072 | /* The above comment is left here for posterity. It is faster | |
1073 | to print one character (non-control) than to print a control | |
1074 | sequence telling the terminal to move forward one character. | |
1075 | That kind of control is for people who don't know what the | |
1076 | data is underneath the cursor. */ | |
1077 | #if defined (HACK_TERMCAP_MOTION) | |
1078 | extern char *term_forward_char; | |
1079 | ||
1080 | if (term_forward_char) | |
1081 | for (i = _rl_last_c_pos; i < new; i++) | |
1082 | tputs (term_forward_char, 1, _rl_output_character_function); | |
1083 | else | |
1084 | for (i = _rl_last_c_pos; i < new; i++) | |
1085 | putc (data[i], rl_outstream); | |
1086 | #else | |
1087 | for (i = _rl_last_c_pos; i < new; i++) | |
1088 | putc (data[i], rl_outstream); | |
1089 | #endif /* HACK_TERMCAP_MOTION */ | |
1090 | } | |
1091 | else if (_rl_last_c_pos != new) | |
1092 | _rl_backspace (_rl_last_c_pos - new); | |
1093 | _rl_last_c_pos = new; | |
1094 | } | |
1095 | ||
1096 | /* PWP: move the cursor up or down. */ | |
1097 | void | |
1098 | _rl_move_vert (to) | |
1099 | int to; | |
1100 | { | |
1101 | register int delta, i; | |
1102 | ||
1103 | if (_rl_last_v_pos == to || to > screenheight) | |
1104 | return; | |
1105 | ||
1106 | #if defined (__GO32__) | |
1107 | { | |
1108 | int row, col; | |
1109 | ||
1110 | ScreenGetCursor (&row, &col); | |
1111 | ScreenSetCursor ((row + to - _rl_last_v_pos), col); | |
1112 | } | |
1113 | #else /* !__GO32__ */ | |
1114 | ||
1115 | if ((delta = to - _rl_last_v_pos) > 0) | |
1116 | { | |
1117 | for (i = 0; i < delta; i++) | |
1118 | putc ('\n', rl_outstream); | |
1119 | tputs (term_cr, 1, _rl_output_character_function); | |
1120 | _rl_last_c_pos = 0; | |
1121 | } | |
1122 | else | |
1123 | { /* delta < 0 */ | |
1124 | if (term_up && *term_up) | |
1125 | for (i = 0; i < -delta; i++) | |
1126 | tputs (term_up, 1, _rl_output_character_function); | |
1127 | } | |
1128 | #endif /* !__GO32__ */ | |
1129 | _rl_last_v_pos = to; /* Now TO is here */ | |
1130 | } | |
1131 | ||
1132 | /* Physically print C on rl_outstream. This is for functions which know | |
1133 | how to optimize the display. Return the number of characters output. */ | |
1134 | int | |
1135 | rl_show_char (c) | |
1136 | int c; | |
1137 | { | |
1138 | int n = 1; | |
1139 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) | |
1140 | { | |
1141 | fprintf (rl_outstream, "M-"); | |
1142 | n += 2; | |
1143 | c = UNMETA (c); | |
1144 | } | |
1145 | ||
1146 | #if defined (DISPLAY_TABS) | |
1147 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) | |
1148 | #else | |
1149 | if (CTRL_CHAR (c) || c == RUBOUT) | |
1150 | #endif /* !DISPLAY_TABS */ | |
1151 | { | |
1152 | fprintf (rl_outstream, "C-"); | |
1153 | n += 2; | |
1154 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; | |
1155 | } | |
1156 | ||
1157 | putc (c, rl_outstream); | |
1158 | fflush (rl_outstream); | |
1159 | return n; | |
1160 | } | |
1161 | ||
1162 | int | |
1163 | rl_character_len (c, pos) | |
1164 | register int c, pos; | |
1165 | { | |
1166 | unsigned char uc; | |
1167 | ||
1168 | uc = (unsigned char)c; | |
1169 | ||
1170 | if (META_CHAR (uc)) | |
1171 | return ((_rl_output_meta_chars == 0) ? 4 : 1); | |
1172 | ||
1173 | if (uc == '\t') | |
1174 | { | |
1175 | #if defined (DISPLAY_TABS) | |
1176 | return (((pos | 7) + 1) - pos); | |
1177 | #else | |
1178 | return (2); | |
1179 | #endif /* !DISPLAY_TABS */ | |
1180 | } | |
1181 | ||
1182 | if (CTRL_CHAR (c) || c == RUBOUT) | |
1183 | return (2); | |
1184 | ||
1185 | return ((isprint (uc)) ? 1 : 2); | |
1186 | } | |
1187 | ||
1188 | /* How to print things in the "echo-area". The prompt is treated as a | |
1189 | mini-modeline. */ | |
1190 | ||
1191 | #if defined (USE_VARARGS) | |
1192 | int | |
1193 | #if defined (PREFER_STDARG) | |
1194 | rl_message (const char *format, ...) | |
1195 | #else | |
1196 | rl_message (va_alist) | |
1197 | va_dcl | |
1198 | #endif | |
1199 | { | |
1200 | va_list args; | |
1201 | #if defined (PREFER_VARARGS) | |
1202 | char *format; | |
1203 | #endif | |
1204 | ||
1205 | #if defined (PREFER_STDARG) | |
1206 | va_start (args, format); | |
1207 | #else | |
1208 | va_start (args); | |
1209 | format = va_arg (args, char *); | |
1210 | #endif | |
1211 | ||
1212 | vsprintf (msg_buf, format, args); | |
1213 | va_end (args); | |
1214 | ||
1215 | rl_display_prompt = msg_buf; | |
1216 | (*rl_redisplay_function) (); | |
1217 | return 0; | |
1218 | } | |
1219 | #else /* !USE_VARARGS */ | |
1220 | int | |
1221 | rl_message (format, arg1, arg2) | |
1222 | char *format; | |
1223 | { | |
1224 | sprintf (msg_buf, format, arg1, arg2); | |
1225 | rl_display_prompt = msg_buf; | |
1226 | (*rl_redisplay_function) (); | |
1227 | return 0; | |
1228 | } | |
1229 | #endif /* !USE_VARARGS */ | |
1230 | ||
1231 | /* How to clear things from the "echo-area". */ | |
1232 | int | |
1233 | rl_clear_message () | |
1234 | { | |
1235 | rl_display_prompt = rl_prompt; | |
1236 | (*rl_redisplay_function) (); | |
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | int | |
1241 | rl_reset_line_state () | |
1242 | { | |
1243 | rl_on_new_line (); | |
1244 | ||
1245 | rl_display_prompt = rl_prompt ? rl_prompt : ""; | |
1246 | forced_display = 1; | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | static char *saved_local_prompt; | |
1251 | static char *saved_local_prefix; | |
1252 | static int saved_last_invisible; | |
1253 | static int saved_visible_length; | |
1254 | ||
1255 | void | |
1256 | _rl_save_prompt () | |
1257 | { | |
1258 | saved_local_prompt = local_prompt; | |
1259 | saved_local_prefix = local_prompt_prefix; | |
1260 | saved_last_invisible = last_invisible; | |
1261 | saved_visible_length = visible_length; | |
1262 | ||
1263 | local_prompt = local_prompt_prefix = (char *)0; | |
1264 | last_invisible = visible_length = 0; | |
1265 | } | |
1266 | ||
1267 | void | |
1268 | _rl_restore_prompt () | |
1269 | { | |
1270 | if (local_prompt) | |
1271 | free (local_prompt); | |
1272 | if (local_prompt_prefix) | |
1273 | free (local_prompt_prefix); | |
1274 | ||
1275 | local_prompt = saved_local_prompt; | |
1276 | local_prompt_prefix = saved_local_prefix; | |
1277 | last_invisible = saved_last_invisible; | |
1278 | visible_length = saved_visible_length; | |
1279 | } | |
1280 | ||
1281 | char * | |
1282 | _rl_make_prompt_for_search (pchar) | |
1283 | int pchar; | |
1284 | { | |
1285 | int len; | |
1286 | char *pmt; | |
1287 | ||
1288 | _rl_save_prompt (); | |
1289 | ||
1290 | if (saved_local_prompt == 0) | |
1291 | { | |
1292 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; | |
1293 | pmt = xmalloc (len + 2); | |
1294 | if (len) | |
1295 | strcpy (pmt, rl_prompt); | |
1296 | pmt[len] = pchar; | |
1297 | pmt[len+1] = '\0'; | |
1298 | } | |
1299 | else | |
1300 | { | |
1301 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; | |
1302 | pmt = xmalloc (len + 2); | |
1303 | if (len) | |
1304 | strcpy (pmt, saved_local_prompt); | |
1305 | pmt[len] = pchar; | |
1306 | pmt[len+1] = '\0'; | |
1307 | local_prompt = savestring (pmt); | |
1308 | last_invisible = saved_last_invisible; | |
1309 | visible_length = saved_visible_length + 1; | |
1310 | } | |
1311 | return pmt; | |
1312 | } | |
1313 | ||
1314 | /* Quick redisplay hack when erasing characters at the end of the line. */ | |
1315 | void | |
1316 | _rl_erase_at_end_of_line (l) | |
1317 | int l; | |
1318 | { | |
1319 | register int i; | |
1320 | ||
1321 | _rl_backspace (l); | |
1322 | for (i = 0; i < l; i++) | |
1323 | putc (' ', rl_outstream); | |
1324 | _rl_backspace (l); | |
1325 | for (i = 0; i < l; i++) | |
1326 | visible_line[--_rl_last_c_pos] = '\0'; | |
1327 | rl_display_fixed++; | |
1328 | } | |
1329 | ||
1330 | /* Clear to the end of the line. COUNT is the minimum | |
1331 | number of character spaces to clear, */ | |
1332 | void | |
1333 | _rl_clear_to_eol (count) | |
1334 | int count; | |
1335 | { | |
1336 | #if !defined (__GO32__) | |
1337 | if (term_clreol) | |
1338 | tputs (term_clreol, 1, _rl_output_character_function); | |
1339 | else if (count) | |
1340 | #endif /* !__GO32__ */ | |
1341 | space_to_eol (count); | |
1342 | } | |
1343 | ||
1344 | /* Clear to the end of the line using spaces. COUNT is the minimum | |
1345 | number of character spaces to clear, */ | |
1346 | static void | |
1347 | space_to_eol (count) | |
1348 | int count; | |
1349 | { | |
1350 | register int i; | |
1351 | ||
1352 | for (i = 0; i < count; i++) | |
1353 | putc (' ', rl_outstream); | |
1354 | ||
1355 | _rl_last_c_pos += count; | |
1356 | } | |
1357 | ||
1358 | void | |
1359 | _rl_clear_screen () | |
1360 | { | |
1361 | #if !defined (__GO32__) | |
1362 | if (term_clrpag) | |
1363 | tputs (term_clrpag, 1, _rl_output_character_function); | |
1364 | else | |
1365 | #endif /* !__GO32__ */ | |
1366 | crlf (); | |
1367 | } | |
1368 | ||
1369 | /* Insert COUNT characters from STRING to the output stream. */ | |
1370 | static void | |
1371 | insert_some_chars (string, count) | |
1372 | char *string; | |
1373 | int count; | |
1374 | { | |
1375 | #if defined (__GO32__) | |
1376 | int row, col, width; | |
1377 | char *row_start; | |
1378 | ||
1379 | ScreenGetCursor (&row, &col); | |
1380 | width = ScreenCols (); | |
1381 | row_start = ScreenPrimary + (row * width); | |
1382 | ||
1383 | memcpy (row_start + col + count, row_start + col, width - col - count); | |
1384 | ||
1385 | /* Place the text on the screen. */ | |
1386 | _rl_output_some_chars (string, count); | |
1387 | #else /* !_GO32 */ | |
1388 | ||
1389 | /* If IC is defined, then we do not have to "enter" insert mode. */ | |
1390 | if (term_IC) | |
1391 | { | |
1392 | char *buffer; | |
1393 | buffer = tgoto (term_IC, 0, count); | |
1394 | tputs (buffer, 1, _rl_output_character_function); | |
1395 | _rl_output_some_chars (string, count); | |
1396 | } | |
1397 | else | |
1398 | { | |
1399 | register int i; | |
1400 | ||
1401 | /* If we have to turn on insert-mode, then do so. */ | |
1402 | if (term_im && *term_im) | |
1403 | tputs (term_im, 1, _rl_output_character_function); | |
1404 | ||
1405 | /* If there is a special command for inserting characters, then | |
1406 | use that first to open up the space. */ | |
1407 | if (term_ic && *term_ic) | |
1408 | { | |
1409 | for (i = count; i--; ) | |
1410 | tputs (term_ic, 1, _rl_output_character_function); | |
1411 | } | |
1412 | ||
1413 | /* Print the text. */ | |
1414 | _rl_output_some_chars (string, count); | |
1415 | ||
1416 | /* If there is a string to turn off insert mode, we had best use | |
1417 | it now. */ | |
1418 | if (term_ei && *term_ei) | |
1419 | tputs (term_ei, 1, _rl_output_character_function); | |
1420 | } | |
1421 | #endif /* !__GO32__ */ | |
1422 | } | |
1423 | ||
1424 | /* Delete COUNT characters from the display line. */ | |
1425 | static void | |
1426 | delete_chars (count) | |
1427 | int count; | |
1428 | { | |
1429 | #if defined (__GO32__) | |
1430 | int row, col, width; | |
1431 | char *row_start; | |
1432 | ||
1433 | ScreenGetCursor (&row, &col); | |
1434 | width = ScreenCols (); | |
1435 | row_start = ScreenPrimary + (row * width); | |
1436 | ||
1437 | memcpy (row_start + col, row_start + col + count, width - col - count); | |
1438 | memset (row_start + width - count, 0, count * 2); | |
1439 | #else /* !_GO32 */ | |
1440 | ||
1441 | if (count > screenwidth) /* XXX */ | |
1442 | return; | |
1443 | ||
1444 | if (term_DC && *term_DC) | |
1445 | { | |
1446 | char *buffer; | |
1447 | buffer = tgoto (term_DC, count, count); | |
1448 | tputs (buffer, count, _rl_output_character_function); | |
1449 | } | |
1450 | else | |
1451 | { | |
1452 | if (term_dc && *term_dc) | |
1453 | while (count--) | |
1454 | tputs (term_dc, 1, _rl_output_character_function); | |
1455 | } | |
1456 | #endif /* !__GO32__ */ | |
1457 | } | |
1458 | ||
1459 | void | |
1460 | _rl_update_final () | |
1461 | { | |
1462 | int full_lines; | |
1463 | ||
1464 | full_lines = 0; | |
1465 | /* If the cursor is the only thing on an otherwise-blank last line, | |
1466 | compensate so we don't print an extra CRLF. */ | |
1467 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && | |
1468 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) | |
1469 | { | |
1470 | _rl_vis_botlin--; | |
1471 | full_lines = 1; | |
1472 | } | |
1473 | _rl_move_vert (_rl_vis_botlin); | |
1474 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ | |
1475 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == screenwidth)) | |
1476 | { | |
1477 | char *last_line; | |
1478 | last_line = &visible_line[inv_lbreaks[_rl_vis_botlin]]; | |
1479 | _rl_move_cursor_relative (screenwidth - 1, last_line); | |
1480 | _rl_clear_to_eol (0); | |
1481 | putc (last_line[screenwidth - 1], rl_outstream); | |
1482 | } | |
1483 | _rl_vis_botlin = 0; | |
1484 | crlf (); | |
1485 | fflush (rl_outstream); | |
1486 | rl_display_fixed++; | |
1487 | } | |
1488 | ||
1489 | /* Move to the start of the current line. */ | |
1490 | static void | |
1491 | cr () | |
1492 | { | |
1493 | if (term_cr) | |
1494 | { | |
771578d1 SS |
1495 | #if defined (__MSDOS__) |
1496 | putc ('\r', rl_outstream); | |
1497 | #else | |
d60d9f65 | 1498 | tputs (term_cr, 1, _rl_output_character_function); |
771578d1 | 1499 | #endif /* !__MSDOS__ */ |
d60d9f65 SS |
1500 | _rl_last_c_pos = 0; |
1501 | } | |
1502 | } | |
1503 | ||
1504 | /* Redisplay the current line after a SIGWINCH is received. */ | |
1505 | void | |
1506 | _rl_redisplay_after_sigwinch () | |
1507 | { | |
1508 | char *t, *oldp, *oldl, *oldlprefix; | |
1509 | ||
1510 | /* Clear the current line and put the cursor at column 0. Make sure | |
1511 | the right thing happens if we have wrapped to a new screen line. */ | |
1512 | if (term_cr) | |
1513 | { | |
771578d1 SS |
1514 | #if defined (__MSDOS__) |
1515 | putc ('\r', rl_outstream); | |
1516 | #else | |
d60d9f65 | 1517 | tputs (term_cr, 1, _rl_output_character_function); |
771578d1 | 1518 | #endif /* !__MSDOS__ */ |
d60d9f65 | 1519 | _rl_last_c_pos = 0; |
771578d1 SS |
1520 | #if defined (__MSDOS__) |
1521 | space_to_eol (screenwidth); | |
1522 | putc ('\r', rl_outstream); | |
1523 | #else | |
d60d9f65 SS |
1524 | if (term_clreol) |
1525 | tputs (term_clreol, 1, _rl_output_character_function); | |
1526 | else | |
1527 | { | |
1528 | space_to_eol (screenwidth); | |
1529 | tputs (term_cr, 1, _rl_output_character_function); | |
1530 | } | |
771578d1 | 1531 | #endif |
d60d9f65 SS |
1532 | if (_rl_last_v_pos > 0) |
1533 | _rl_move_vert (0); | |
1534 | } | |
1535 | else | |
1536 | crlf (); | |
1537 | ||
1538 | /* Redraw only the last line of a multi-line prompt. */ | |
1539 | t = strrchr (rl_display_prompt, '\n'); | |
1540 | if (t) | |
1541 | { | |
1542 | oldp = rl_display_prompt; | |
1543 | oldl = local_prompt; | |
1544 | oldlprefix = local_prompt_prefix; | |
1545 | rl_display_prompt = ++t; | |
1546 | local_prompt = local_prompt_prefix = (char *)NULL; | |
1547 | rl_forced_update_display (); | |
1548 | rl_display_prompt = oldp; | |
1549 | local_prompt = oldl; | |
1550 | local_prompt_prefix = oldlprefix; | |
1551 | } | |
1552 | else | |
1553 | rl_forced_update_display (); | |
1554 | } | |
1555 | ||
1556 | void | |
1557 | _rl_clean_up_for_exit () | |
1558 | { | |
1559 | if (readline_echoing_p) | |
1560 | { | |
1561 | _rl_move_vert (_rl_vis_botlin); | |
1562 | _rl_vis_botlin = 0; | |
1563 | fflush (rl_outstream); | |
1564 | rl_restart_output (); | |
1565 | } | |
1566 | } |