| File: | src/gnu/lib/libreadline/display.c |
| Warning: | line 410, column 9 Although the value stored to 'inv_botlin' is used in the enclosing expression, the value is never actually read from 'inv_botlin' |
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| 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 2, 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 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
| 22 | #define READLINE_LIBRARY |
| 23 | |
| 24 | #if defined (HAVE_CONFIG_H1) |
| 25 | # include <config.h> |
| 26 | #endif |
| 27 | |
| 28 | #include <sys/types.h> |
| 29 | |
| 30 | #if defined (HAVE_UNISTD_H1) |
| 31 | # include <unistd.h> |
| 32 | #endif /* HAVE_UNISTD_H */ |
| 33 | |
| 34 | #include "posixstat.h" |
| 35 | |
| 36 | #if defined (HAVE_STDLIB_H1) |
| 37 | # include <stdlib.h> |
| 38 | #else |
| 39 | # include "ansi_stdlib.h" |
| 40 | #endif /* HAVE_STDLIB_H */ |
| 41 | |
| 42 | #include <stdio.h> |
| 43 | |
| 44 | /* System-specific feature definitions and include files. */ |
| 45 | #include "rldefs.h" |
| 46 | #include "rlmbutil.h" |
| 47 | |
| 48 | /* Termcap library stuff. */ |
| 49 | #include "tcap.h" |
| 50 | |
| 51 | /* Some standard library routines. */ |
| 52 | #include "readline.h" |
| 53 | #include "history.h" |
| 54 | |
| 55 | #include "rlprivate.h" |
| 56 | #include "xmalloc.h" |
| 57 | |
| 58 | #if !defined (strchr) && !defined (__STDC__1) |
| 59 | extern char *strchr (), *strrchr (); |
| 60 | #endif /* !strchr && !__STDC__ */ |
| 61 | |
| 62 | #if defined (HACK_TERMCAP_MOTION) |
| 63 | extern char *_rl_term_forward_char; |
| 64 | #endif |
| 65 | |
| 66 | static void update_line PARAMS((char *, char *, int, int, int, int))(char *, char *, int, int, int, int); |
| 67 | static void space_to_eol PARAMS((int))(int); |
| 68 | static void delete_chars PARAMS((int))(int); |
| 69 | static void insert_some_chars PARAMS((char *, int, int))(char *, int, int); |
| 70 | static void cr PARAMS((void))(void); |
| 71 | |
| 72 | #if defined (HANDLE_MULTIBYTE) |
| 73 | static int _rl_col_width PARAMS((const char *, int, int))(const char *, int, int); |
| 74 | static int *_rl_wrapped_line; |
| 75 | #else |
| 76 | # define _rl_col_width(l, s, e)(((e) <= (s)) ? 0 : (e) - (s)) (((e) <= (s)) ? 0 : (e) - (s)) |
| 77 | #endif |
| 78 | |
| 79 | static int *inv_lbreaks, *vis_lbreaks; |
| 80 | static int inv_lbsize, vis_lbsize; |
| 81 | |
| 82 | /* Heuristic used to decide whether it is faster to move from CUR to NEW |
| 83 | by backing up or outputting a carriage return and moving forward. */ |
| 84 | #define CR_FASTER(new, cur)(((new) + 1) < ((cur) - (new))) (((new) + 1) < ((cur) - (new))) |
| 85 | |
| 86 | /* **************************************************************** */ |
| 87 | /* */ |
| 88 | /* Display stuff */ |
| 89 | /* */ |
| 90 | /* **************************************************************** */ |
| 91 | |
| 92 | /* This is the stuff that is hard for me. I never seem to write good |
| 93 | display routines in C. Let's see how I do this time. */ |
| 94 | |
| 95 | /* (PWP) Well... Good for a simple line updater, but totally ignores |
| 96 | the problems of input lines longer than the screen width. |
| 97 | |
| 98 | update_line and the code that calls it makes a multiple line, |
| 99 | automatically wrapping line update. Careful attention needs |
| 100 | to be paid to the vertical position variables. */ |
| 101 | |
| 102 | /* Keep two buffers; one which reflects the current contents of the |
| 103 | screen, and the other to draw what we think the new contents should |
| 104 | be. Then compare the buffers, and make whatever changes to the |
| 105 | screen itself that we should. Finally, make the buffer that we |
| 106 | just drew into be the one which reflects the current contents of the |
| 107 | screen, and place the cursor where it belongs. |
| 108 | |
| 109 | Commands that want to can fix the display themselves, and then let |
| 110 | this function know that the display has been fixed by setting the |
| 111 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ |
| 112 | |
| 113 | /* Application-specific redisplay function. */ |
| 114 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
| 115 | |
| 116 | /* Global variables declared here. */ |
| 117 | /* What YOU turn on when you have handled all redisplay yourself. */ |
| 118 | int rl_display_fixed = 0; |
| 119 | |
| 120 | int _rl_suppress_redisplay = 0; |
| 121 | |
| 122 | /* The stuff that gets printed out before the actual text of the line. |
| 123 | This is usually pointing to rl_prompt. */ |
| 124 | char *rl_display_prompt = (char *)NULL((void *)0); |
| 125 | |
| 126 | /* Pseudo-global variables declared here. */ |
| 127 | /* The visible cursor position. If you print some text, adjust this. */ |
| 128 | int _rl_last_c_pos = 0; |
| 129 | int _rl_last_v_pos = 0; |
| 130 | |
| 131 | /* Number of lines currently on screen minus 1. */ |
| 132 | int _rl_vis_botlin = 0; |
| 133 | |
| 134 | /* Variables used only in this file. */ |
| 135 | /* The last left edge of text that was displayed. This is used when |
| 136 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ |
| 137 | static int last_lmargin; |
| 138 | |
| 139 | /* The line display buffers. One is the line currently displayed on |
| 140 | the screen. The other is the line about to be displayed. */ |
| 141 | static char *visible_line = (char *)NULL((void *)0); |
| 142 | static char *invisible_line = (char *)NULL((void *)0); |
| 143 | |
| 144 | /* A buffer for `modeline' messages. */ |
| 145 | static char msg_buf[128]; |
| 146 | |
| 147 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ |
| 148 | static int forced_display; |
| 149 | |
| 150 | /* Default and initial buffer size. Can grow. */ |
| 151 | static int line_size = 1024; |
| 152 | |
| 153 | /* Variables to keep track of the expanded prompt string, which may |
| 154 | include invisible characters. */ |
| 155 | |
| 156 | static char *local_prompt, *local_prompt_prefix; |
| 157 | static int prompt_visible_length, prompt_prefix_length; |
| 158 | |
| 159 | /* The number of invisible characters in the line currently being |
| 160 | displayed on the screen. */ |
| 161 | static int visible_wrap_offset; |
| 162 | |
| 163 | /* The number of invisible characters in the prompt string. Static so it |
| 164 | can be shared between rl_redisplay and update_line */ |
| 165 | static int wrap_offset; |
| 166 | |
| 167 | /* The index of the last invisible character in the prompt string. */ |
| 168 | static int prompt_last_invisible; |
| 169 | |
| 170 | /* The length (buffer offset) of the first line of the last (possibly |
| 171 | multi-line) buffer displayed on the screen. */ |
| 172 | static int visible_first_line_len; |
| 173 | |
| 174 | /* Number of invisible characters on the first physical line of the prompt. |
| 175 | Only valid when the number of physical characters in the prompt exceeds |
| 176 | (or is equal to) _rl_screenwidth. */ |
| 177 | static int prompt_invis_chars_first_line; |
| 178 | |
| 179 | static int prompt_last_screen_line; |
| 180 | |
| 181 | /* Expand the prompt string S and return the number of visible |
| 182 | characters in *LP, if LP is not null. This is currently more-or-less |
| 183 | a placeholder for expansion. LIP, if non-null is a place to store the |
| 184 | index of the last invisible character in the returned string. NIFLP, |
| 185 | if non-zero, is a place to store the number of invisible characters in |
| 186 | the first prompt line. */ |
| 187 | |
| 188 | /* Current implementation: |
| 189 | \001 (^A) start non-visible characters |
| 190 | \002 (^B) end non-visible characters |
| 191 | all characters except \001 and \002 (following a \001) are copied to |
| 192 | the returned string; all characters except those between \001 and |
| 193 | \002 are assumed to be `visible'. */ |
| 194 | |
| 195 | static char * |
| 196 | expand_prompt (pmt, lp, lip, niflp) |
| 197 | char *pmt; |
| 198 | int *lp, *lip, *niflp; |
| 199 | { |
| 200 | char *r, *ret, *p; |
| 201 | int l, rl, last, ignoring, ninvis, invfl; |
| 202 | |
| 203 | /* Short-circuit if we can. */ |
| 204 | if (strchr (pmt, RL_PROMPT_START_IGNORE'\001') == 0) |
| 205 | { |
| 206 | r = savestring (pmt)xstrdup(pmt); |
| 207 | if (lp) |
| 208 | *lp = strlen (r); |
| 209 | return r; |
| 210 | } |
| 211 | |
| 212 | l = strlen (pmt); |
| 213 | r = ret = (char *)xmalloc (l + 1); |
| 214 | |
| 215 | invfl = 0; /* invisible chars in first line of prompt */ |
| 216 | |
| 217 | for (rl = ignoring = last = ninvis = 0, p = pmt; p && *p; p++) |
| 218 | { |
| 219 | /* This code strips the invisible character string markers |
| 220 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ |
| 221 | if (*p == RL_PROMPT_START_IGNORE'\001') |
| 222 | { |
| 223 | ignoring++; |
| 224 | continue; |
| 225 | } |
| 226 | else if (ignoring && *p == RL_PROMPT_END_IGNORE'\002') |
| 227 | { |
| 228 | ignoring = 0; |
| 229 | last = r - ret - 1; |
| 230 | continue; |
| 231 | } |
| 232 | else |
| 233 | { |
| 234 | *r++ = *p; |
| 235 | if (!ignoring) |
| 236 | rl++; |
| 237 | else |
| 238 | ninvis++; |
| 239 | if (rl == _rl_screenwidth) |
| 240 | invfl = ninvis; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | if (rl < _rl_screenwidth) |
| 245 | invfl = ninvis; |
| 246 | |
| 247 | *r = '\0'; |
| 248 | if (lp) |
| 249 | *lp = rl; |
| 250 | if (lip) |
| 251 | *lip = last; |
| 252 | if (niflp) |
| 253 | *niflp = invfl; |
| 254 | return ret; |
| 255 | } |
| 256 | |
| 257 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
| 258 | PMT and return the rest of PMT. */ |
| 259 | char * |
| 260 | _rl_strip_prompt (pmt) |
| 261 | char *pmt; |
| 262 | { |
| 263 | char *ret; |
| 264 | |
| 265 | ret = expand_prompt (pmt, (int *)NULL((void *)0), (int *)NULL((void *)0), (int *)NULL((void *)0)); |
| 266 | return ret; |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | * Expand the prompt string into the various display components, if |
| 271 | * necessary. |
| 272 | * |
| 273 | * local_prompt = expanded last line of string in rl_display_prompt |
| 274 | * (portion after the final newline) |
| 275 | * local_prompt_prefix = portion before last newline of rl_display_prompt, |
| 276 | * expanded via expand_prompt |
| 277 | * prompt_visible_length = number of visible characters in local_prompt |
| 278 | * prompt_prefix_length = number of visible characters in local_prompt_prefix |
| 279 | * |
| 280 | * This function is called once per call to readline(). It may also be |
| 281 | * called arbitrarily to expand the primary prompt. |
| 282 | * |
| 283 | * The return value is the number of visible characters on the last line |
| 284 | * of the (possibly multi-line) prompt. |
| 285 | */ |
| 286 | int |
| 287 | rl_expand_prompt (prompt) |
| 288 | char *prompt; |
| 289 | { |
| 290 | char *p, *t; |
| 291 | int c; |
| 292 | |
| 293 | /* Clear out any saved values. */ |
| 294 | FREE (local_prompt)if (local_prompt) free (local_prompt); |
| 295 | FREE (local_prompt_prefix)if (local_prompt_prefix) free (local_prompt_prefix); |
| 296 | |
| 297 | local_prompt = local_prompt_prefix = (char *)0; |
| 298 | prompt_last_invisible = prompt_visible_length = 0; |
| 299 | |
| 300 | if (prompt == 0 || *prompt == 0) |
| 301 | return (0); |
| 302 | |
| 303 | p = strrchr (prompt, '\n'); |
| 304 | if (!p) |
| 305 | { |
| 306 | /* The prompt is only one logical line, though it might wrap. */ |
| 307 | local_prompt = expand_prompt (prompt, &prompt_visible_length, |
| 308 | &prompt_last_invisible, |
| 309 | &prompt_invis_chars_first_line); |
| 310 | local_prompt_prefix = (char *)0; |
| 311 | return (prompt_visible_length); |
| 312 | } |
| 313 | else |
| 314 | { |
| 315 | /* The prompt spans multiple lines. */ |
| 316 | t = ++p; |
| 317 | local_prompt = expand_prompt (p, &prompt_visible_length, |
| 318 | &prompt_last_invisible, |
| 319 | &prompt_invis_chars_first_line); |
| 320 | c = *t; *t = '\0'; |
| 321 | /* The portion of the prompt string up to and including the |
| 322 | final newline is now null-terminated. */ |
| 323 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
| 324 | (int *)NULL((void *)0), |
| 325 | &prompt_invis_chars_first_line); |
| 326 | *t = c; |
| 327 | return (prompt_prefix_length); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
| 332 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE |
| 333 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is |
| 334 | increased. If the lines have already been allocated, this ensures that |
| 335 | they can hold at least MINSIZE characters. */ |
| 336 | static void |
| 337 | init_line_structures (minsize) |
| 338 | int minsize; |
| 339 | { |
| 340 | register int n; |
| 341 | |
| 342 | if (invisible_line == 0) /* initialize it */ |
| 343 | { |
| 344 | if (line_size < minsize) |
| 345 | line_size = minsize; |
| 346 | visible_line = (char *)xmalloc (line_size); |
| 347 | invisible_line = (char *)xmalloc (line_size); |
| 348 | } |
| 349 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ |
| 350 | { |
| 351 | line_size *= 2; |
| 352 | if (line_size < minsize) |
| 353 | line_size = minsize; |
| 354 | visible_line = (char *)xrealloc (visible_line, line_size); |
| 355 | invisible_line = (char *)xrealloc (invisible_line, line_size); |
| 356 | } |
| 357 | |
| 358 | for (n = minsize; n < line_size; n++) |
| 359 | { |
| 360 | visible_line[n] = 0; |
| 361 | invisible_line[n] = 1; |
| 362 | } |
| 363 | |
| 364 | if (vis_lbreaks == 0) |
| 365 | { |
| 366 | /* should be enough. */ |
| 367 | inv_lbsize = vis_lbsize = 256; |
| 368 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); |
| 369 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); |
| 370 | #if defined (HANDLE_MULTIBYTE) |
| 371 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); |
| 372 | #endif |
| 373 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | /* Basic redisplay algorithm. */ |
| 378 | void |
| 379 | rl_redisplay () |
| 380 | { |
| 381 | register int in, out, c, linenum, cursor_linenum; |
| 382 | register char *line; |
| 383 | int c_pos, inv_botlin, lb_botlin, lb_linenum; |
| 384 | int newlines, lpos, temp; |
| 385 | char *prompt_this_line; |
| 386 | #if defined (HANDLE_MULTIBYTE) |
| 387 | wchar_t wc; |
| 388 | size_t wc_bytes; |
| 389 | int wc_width; |
| 390 | mbstate_t ps; |
| 391 | int _rl_wrapped_multicolumn = 0; |
| 392 | #endif |
| 393 | |
| 394 | if (!readline_echoing_p) |
| 395 | return; |
| 396 | |
| 397 | if (!rl_display_prompt) |
| 398 | rl_display_prompt = ""; |
| 399 | |
| 400 | if (invisible_line == 0) |
| 401 | { |
| 402 | init_line_structures (0); |
| 403 | rl_on_new_line (); |
| 404 | } |
| 405 | |
| 406 | /* Draw the line into the buffer. */ |
| 407 | c_pos = -1; |
| 408 | |
| 409 | line = invisible_line; |
| 410 | out = inv_botlin = 0; |
Although the value stored to 'inv_botlin' is used in the enclosing expression, the value is never actually read from 'inv_botlin' | |
| 411 | |
| 412 | /* Mark the line as modified or not. We only do this for history |
| 413 | lines. */ |
| 414 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
| 415 | { |
| 416 | line[out++] = '*'; |
| 417 | line[out] = '\0'; |
| 418 | } |
| 419 | |
| 420 | /* If someone thought that the redisplay was handled, but the currently |
| 421 | visible line has a different modification state than the one about |
| 422 | to become visible, then correct the caller's misconception. */ |
| 423 | if (visible_line[0] != invisible_line[0]) |
| 424 | rl_display_fixed = 0; |
| 425 | |
| 426 | /* If the prompt to be displayed is the `primary' readline prompt (the |
| 427 | one passed to readline()), use the values we have already expanded. |
| 428 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the |
| 429 | number of non-visible characters in the prompt string. */ |
| 430 | if (rl_display_prompt == rl_prompt || local_prompt) |
| 431 | { |
| 432 | int local_len = local_prompt ? strlen (local_prompt) : 0; |
| 433 | if (local_prompt_prefix && forced_display) |
| 434 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); |
| 435 | |
| 436 | if (local_len > 0) |
| 437 | { |
| 438 | temp = local_len + out + 2; |
| 439 | if (temp >= line_size) |
| 440 | { |
| 441 | line_size = (temp + 1024) - (temp % 1024); |
| 442 | visible_line = (char *)xrealloc (visible_line, line_size); |
| 443 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); |
| 444 | } |
| 445 | strncpy (line + out, local_prompt, local_len); |
| 446 | out += local_len; |
| 447 | } |
| 448 | line[out] = '\0'; |
| 449 | wrap_offset = local_len - prompt_visible_length; |
| 450 | } |
| 451 | else |
| 452 | { |
| 453 | int pmtlen; |
| 454 | prompt_this_line = strrchr (rl_display_prompt, '\n'); |
| 455 | if (!prompt_this_line) |
| 456 | prompt_this_line = rl_display_prompt; |
| 457 | else |
| 458 | { |
| 459 | prompt_this_line++; |
| 460 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
| 461 | if (forced_display) |
| 462 | { |
| 463 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
| 464 | /* Make sure we are at column zero even after a newline, |
| 465 | regardless of the state of terminal output processing. */ |
| 466 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
| 467 | cr (); |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | pmtlen = strlen (prompt_this_line); |
| 472 | temp = pmtlen + out + 2; |
| 473 | if (temp >= line_size) |
| 474 | { |
| 475 | line_size = (temp + 1024) - (temp % 1024); |
| 476 | visible_line = (char *)xrealloc (visible_line, line_size); |
| 477 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); |
| 478 | } |
| 479 | strncpy (line + out, prompt_this_line, pmtlen); |
| 480 | out += pmtlen; |
| 481 | line[out] = '\0'; |
| 482 | wrap_offset = prompt_invis_chars_first_line = 0; |
| 483 | } |
| 484 | |
| 485 | #define CHECK_INV_LBREAKS()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0) \ |
| 486 | do { \ |
| 487 | if (newlines >= (inv_lbsize - 2)) \ |
| 488 | { \ |
| 489 | inv_lbsize *= 2; \ |
| 490 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
| 491 | } \ |
| 492 | } while (0) |
| 493 | |
| 494 | #if defined (HANDLE_MULTIBYTE) |
| 495 | #define CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0) \ |
| 496 | do { \ |
| 497 | lpos++; \ |
| 498 | if (lpos >= _rl_screenwidth) \ |
| 499 | { \ |
| 500 | if (newlines >= (inv_lbsize - 2)) \ |
| 501 | { \ |
| 502 | inv_lbsize *= 2; \ |
| 503 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
| 504 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
| 505 | } \ |
| 506 | inv_lbreaks[++newlines] = out; \ |
| 507 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
| 508 | lpos = 0; \ |
| 509 | } \ |
| 510 | } while (0) |
| 511 | #else |
| 512 | #define CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0) \ |
| 513 | do { \ |
| 514 | lpos++; \ |
| 515 | if (lpos >= _rl_screenwidth) \ |
| 516 | { \ |
| 517 | if (newlines >= (inv_lbsize - 2)) \ |
| 518 | { \ |
| 519 | inv_lbsize *= 2; \ |
| 520 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
| 521 | } \ |
| 522 | inv_lbreaks[++newlines] = out; \ |
| 523 | lpos = 0; \ |
| 524 | } \ |
| 525 | } while (0) |
| 526 | #endif |
| 527 | |
| 528 | /* inv_lbreaks[i] is where line i starts in the buffer. */ |
| 529 | inv_lbreaks[newlines = 0] = 0; |
| 530 | lpos = out - wrap_offset; |
| 531 | #if defined (HANDLE_MULTIBYTE) |
| 532 | memset (_rl_wrapped_line, 0, vis_lbsize); |
| 533 | #endif |
| 534 | |
| 535 | /* prompt_invis_chars_first_line is the number of invisible characters in |
| 536 | the first physical line of the prompt. |
| 537 | wrap_offset - prompt_invis_chars_first_line is the number of invis |
| 538 | chars on the second line. */ |
| 539 | |
| 540 | /* what if lpos is already >= _rl_screenwidth before we start drawing the |
| 541 | contents of the command line? */ |
| 542 | while (lpos >= _rl_screenwidth) |
| 543 | { |
| 544 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
| 545 | invisible characters that is longer than the screen width. The |
| 546 | prompt_invis_chars_first_line variable could be made into an array |
| 547 | saying how many invisible characters there are per line, but that's |
| 548 | probably too much work for the benefit gained. How many people have |
| 549 | prompts that exceed two physical lines? */ |
| 550 | temp = ((newlines + 1) * _rl_screenwidth) + |
| 551 | #if 0 |
| 552 | ((newlines == 0) ? prompt_invis_chars_first_line : 0) + |
| 553 | #else |
| 554 | ((newlines == 0 && local_prompt_prefix == 0) ? prompt_invis_chars_first_line : 0) + |
| 555 | #endif |
| 556 | ((newlines == 1) ? wrap_offset : 0); |
| 557 | |
| 558 | inv_lbreaks[++newlines] = temp; |
| 559 | lpos -= _rl_screenwidth; |
| 560 | } |
| 561 | |
| 562 | prompt_last_screen_line = newlines; |
| 563 | |
| 564 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping |
| 565 | track of where the cursor is (c_pos), the number of the line containing |
| 566 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
| 567 | It maintains an array of line breaks for display (inv_lbreaks). |
| 568 | This handles expanding tabs for display and displaying meta characters. */ |
| 569 | lb_linenum = 0; |
| 570 | #if defined (HANDLE_MULTIBYTE) |
| 571 | in = 0; |
| 572 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 573 | { |
| 574 | memset (&ps, 0, sizeof (mbstate_t)); |
| 575 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); |
| 576 | } |
| 577 | else |
| 578 | wc_bytes = 1; |
| 579 | while (in < rl_end) |
| 580 | #else |
| 581 | for (in = 0; in < rl_end; in++) |
| 582 | #endif |
| 583 | { |
| 584 | c = (unsigned char)rl_line_buffer[in]; |
| 585 | |
| 586 | #if defined (HANDLE_MULTIBYTE) |
| 587 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 588 | { |
| 589 | if (wc_bytes == (size_t)-1 || wc_bytes == (size_t)-2) |
| 590 | { |
| 591 | /* Byte sequence is invalid or shortened. Assume that the |
| 592 | first byte represents a character. */ |
| 593 | wc_bytes = 1; |
| 594 | /* Assume that a character occupies a single column. */ |
| 595 | wc_width = 1; |
| 596 | memset (&ps, 0, sizeof (mbstate_t)); |
| 597 | } |
| 598 | else if (wc_bytes == (size_t)0) |
| 599 | break; /* Found '\0' */ |
| 600 | else |
| 601 | { |
| 602 | temp = wcwidth (wc); |
| 603 | wc_width = (temp < 0) ? 1 : temp; |
| 604 | } |
| 605 | } |
| 606 | #endif |
| 607 | |
| 608 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
| 609 | { |
| 610 | line_size *= 2; |
| 611 | visible_line = (char *)xrealloc (visible_line, line_size); |
| 612 | invisible_line = (char *)xrealloc (invisible_line, line_size); |
| 613 | line = invisible_line; |
| 614 | } |
| 615 | |
| 616 | if (in == rl_point) |
| 617 | { |
| 618 | c_pos = out; |
| 619 | lb_linenum = newlines; |
| 620 | } |
| 621 | |
| 622 | #if defined (HANDLE_MULTIBYTE) |
| 623 | if (META_CHAR (c)((c) > 0x07f && (c) <= 255) && _rl_output_meta_chars == 0) /* XXX - clean up */ |
| 624 | #else |
| 625 | if (META_CHAR (c)((c) > 0x07f && (c) <= 255)) |
| 626 | #endif |
| 627 | { |
| 628 | if (_rl_output_meta_chars == 0) |
| 629 | { |
| 630 | snprintf (line + out, line_size - out, "\\%o", c); |
| 631 | |
| 632 | if (lpos + 4 >= _rl_screenwidth) |
| 633 | { |
| 634 | temp = _rl_screenwidth - lpos; |
| 635 | CHECK_INV_LBREAKS ()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0); |
| 636 | inv_lbreaks[++newlines] = out + temp; |
| 637 | lpos = 4 - temp; |
| 638 | } |
| 639 | else |
| 640 | lpos += 4; |
| 641 | |
| 642 | out += 4; |
| 643 | } |
| 644 | else |
| 645 | { |
| 646 | line[out++] = c; |
| 647 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
| 648 | } |
| 649 | } |
| 650 | #if defined (DISPLAY_TABS) |
| 651 | else if (c == '\t') |
| 652 | { |
| 653 | register int newout; |
| 654 | |
| 655 | #if 0 |
| 656 | newout = (out | (int)7) + 1; |
| 657 | #else |
| 658 | newout = out + 8 - lpos % 8; |
| 659 | #endif |
| 660 | temp = newout - out; |
| 661 | if (lpos + temp >= _rl_screenwidth) |
| 662 | { |
| 663 | register int temp2; |
| 664 | temp2 = _rl_screenwidth - lpos; |
| 665 | CHECK_INV_LBREAKS ()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0); |
| 666 | inv_lbreaks[++newlines] = out + temp2; |
| 667 | lpos = temp - temp2; |
| 668 | while (out < newout) |
| 669 | line[out++] = ' '; |
| 670 | } |
| 671 | else |
| 672 | { |
| 673 | while (out < newout) |
| 674 | line[out++] = ' '; |
| 675 | lpos += temp; |
| 676 | } |
| 677 | } |
| 678 | #endif |
| 679 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
| 680 | { |
| 681 | line[out++] = '\0'; /* XXX - sentinel */ |
| 682 | CHECK_INV_LBREAKS ()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0); |
| 683 | inv_lbreaks[++newlines] = out; |
| 684 | lpos = 0; |
| 685 | } |
| 686 | else if (CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) || c == RUBOUT0x7f) |
| 687 | { |
| 688 | line[out++] = '^'; |
| 689 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
| 690 | line[out++] = CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) ? UNCTRL (c)((((unsigned char)(((c)|0x40)) == (((c)|0x40))) && (isascii (((c)|0x40)) && islower (((c)|0x40)))) ? toupper((unsigned char)((c)|0x40)) : (((c)|0x40))) : '?'; |
| 691 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
| 692 | } |
| 693 | else |
| 694 | { |
| 695 | #if defined (HANDLE_MULTIBYTE) |
| 696 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 697 | { |
| 698 | register int i; |
| 699 | |
| 700 | _rl_wrapped_multicolumn = 0; |
| 701 | |
| 702 | if (_rl_screenwidth < lpos + wc_width) |
| 703 | for (i = lpos; i < _rl_screenwidth; i++) |
| 704 | { |
| 705 | /* The space will be removed in update_line() */ |
| 706 | line[out++] = ' '; |
| 707 | _rl_wrapped_multicolumn++; |
| 708 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
| 709 | } |
| 710 | if (in == rl_point) |
| 711 | { |
| 712 | c_pos = out; |
| 713 | lb_linenum = newlines; |
| 714 | } |
| 715 | for (i = in; i < in+wc_bytes; i++) |
| 716 | line[out++] = rl_line_buffer[i]; |
| 717 | for (i = 0; i < wc_width; i++) |
| 718 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
| 719 | } |
| 720 | else |
| 721 | { |
| 722 | line[out++] = c; |
| 723 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
| 724 | } |
| 725 | #else |
| 726 | line[out++] = c; |
| 727 | CHECK_LPOS()do { lpos++; if (lpos >= _rl_screenwidth) { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } inv_lbreaks[++newlines ] = out; lpos = 0; } } while (0); |
| 728 | #endif |
| 729 | } |
| 730 | |
| 731 | #if defined (HANDLE_MULTIBYTE) |
| 732 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 733 | { |
| 734 | in += wc_bytes; |
| 735 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); |
| 736 | } |
| 737 | else |
| 738 | in++; |
| 739 | #endif |
| 740 | |
| 741 | } |
| 742 | line[out] = '\0'; |
| 743 | if (c_pos < 0) |
| 744 | { |
| 745 | c_pos = out; |
| 746 | lb_linenum = newlines; |
| 747 | } |
| 748 | |
| 749 | inv_botlin = lb_botlin = newlines; |
| 750 | CHECK_INV_LBREAKS ()do { if (newlines >= (inv_lbsize - 2)) { inv_lbsize *= 2; inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); } } while (0); |
| 751 | inv_lbreaks[newlines+1] = out; |
| 752 | cursor_linenum = lb_linenum; |
| 753 | |
| 754 | /* C_POS == position in buffer where cursor should be placed. |
| 755 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
| 756 | |
| 757 | /* PWP: now is when things get a bit hairy. The visible and invisible |
| 758 | line buffers are really multiple lines, which would wrap every |
| 759 | (screenwidth - 1) characters. Go through each in turn, finding |
| 760 | the changed region and updating it. The line order is top to bottom. */ |
| 761 | |
| 762 | /* If we can move the cursor up and down, then use multiple lines, |
| 763 | otherwise, let long lines display in a single terminal line, and |
| 764 | horizontally scroll it. */ |
| 765 | |
| 766 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
| 767 | { |
| 768 | int nleft, pos, changed_screen_line; |
| 769 | |
| 770 | if (!rl_display_fixed || forced_display) |
| 771 | { |
| 772 | forced_display = 0; |
| 773 | |
| 774 | /* If we have more than a screenful of material to display, then |
| 775 | only display a screenful. We should display the last screen, |
| 776 | not the first. */ |
| 777 | if (out >= _rl_screenchars) |
| 778 | { |
| 779 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 780 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY)(((_rl_screenchars) == 0) ? (_rl_screenchars) : ((_rl_screenchars ) - 1)); |
| 781 | else |
| 782 | out = _rl_screenchars - 1; |
| 783 | } |
| 784 | |
| 785 | /* The first line is at character position 0 in the buffer. The |
| 786 | second and subsequent lines start at inv_lbreaks[N], offset by |
| 787 | OFFSET (which has already been calculated above). */ |
| 788 | |
| 789 | #define W_OFFSET(line, offset)((line) == 0 ? offset : 0) ((line) == 0 ? offset : 0) |
| 790 | #define VIS_LLEN(l)((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks [l])) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
| 791 | #define INV_LLEN(l)(inv_lbreaks[l+1] - inv_lbreaks[l]) (inv_lbreaks[l+1] - inv_lbreaks[l]) |
| 792 | #define VIS_CHARS(line)(visible_line + vis_lbreaks[line]) (visible_line + vis_lbreaks[line]) |
| 793 | #define VIS_LINE(line)((line) > _rl_vis_botlin) ? "" : (visible_line + vis_lbreaks [line]) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line)(visible_line + vis_lbreaks[line]) |
| 794 | #define INV_LINE(line)(invisible_line + inv_lbreaks[line]) (invisible_line + inv_lbreaks[line]) |
| 795 | |
| 796 | /* For each line in the buffer, do the updating display. */ |
| 797 | for (linenum = 0; linenum <= inv_botlin; linenum++) |
| 798 | { |
| 799 | update_line (VIS_LINE(linenum)((linenum) > _rl_vis_botlin) ? "" : (visible_line + vis_lbreaks [linenum]), INV_LINE(linenum)(invisible_line + inv_lbreaks[linenum]), linenum, |
| 800 | VIS_LLEN(linenum)((linenum) > _rl_vis_botlin ? 0 : (vis_lbreaks[linenum+1] - vis_lbreaks[linenum])), INV_LLEN(linenum)(inv_lbreaks[linenum+1] - inv_lbreaks[linenum]), inv_botlin); |
| 801 | |
| 802 | /* If this is the line with the prompt, we might need to |
| 803 | compensate for invisible characters in the new line. Do |
| 804 | this only if there is not more than one new line (which |
| 805 | implies that we completely overwrite the old visible line) |
| 806 | and the new line is shorter than the old. Make sure we are |
| 807 | at the end of the new line before clearing. */ |
| 808 | if (linenum == 0 && |
| 809 | inv_botlin == 0 && _rl_last_c_pos == out && |
| 810 | (wrap_offset > visible_wrap_offset) && |
| 811 | (_rl_last_c_pos < visible_first_line_len)) |
| 812 | { |
| 813 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; |
| 814 | if (nleft) |
| 815 | _rl_clear_to_eol (nleft); |
| 816 | } |
| 817 | |
| 818 | /* Since the new first line is now visible, save its length. */ |
| 819 | if (linenum == 0) |
| 820 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
| 821 | } |
| 822 | |
| 823 | /* We may have deleted some lines. If so, clear the left over |
| 824 | blank ones at the bottom out. */ |
| 825 | if (_rl_vis_botlin > inv_botlin) |
| 826 | { |
| 827 | char *tt; |
| 828 | for (; linenum <= _rl_vis_botlin; linenum++) |
| 829 | { |
| 830 | tt = VIS_CHARS (linenum)(visible_line + vis_lbreaks[linenum]); |
| 831 | _rl_move_vert (linenum); |
| 832 | _rl_move_cursor_relative (0, tt); |
| 833 | _rl_clear_to_eol |
| 834 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
| 835 | } |
| 836 | } |
| 837 | _rl_vis_botlin = inv_botlin; |
| 838 | |
| 839 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
| 840 | different screen line during this redisplay. */ |
| 841 | changed_screen_line = _rl_last_v_pos != cursor_linenum; |
| 842 | if (changed_screen_line) |
| 843 | { |
| 844 | _rl_move_vert (cursor_linenum); |
| 845 | /* If we moved up to the line with the prompt using _rl_term_up, |
| 846 | the physical cursor position on the screen stays the same, |
| 847 | but the buffer position needs to be adjusted to account |
| 848 | for invisible characters. */ |
| 849 | if (cursor_linenum == 0 && wrap_offset) |
| 850 | _rl_last_c_pos += wrap_offset; |
| 851 | } |
| 852 | |
| 853 | /* We have to reprint the prompt if it contains invisible |
| 854 | characters, since it's not generally OK to just reprint |
| 855 | the characters from the current cursor position. But we |
| 856 | only need to reprint it if the cursor is before the last |
| 857 | invisible character in the prompt string. */ |
| 858 | nleft = prompt_visible_length + wrap_offset; |
| 859 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
| 860 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
| 861 | { |
| 862 | #if defined (__MSDOS__) |
| 863 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
| 864 | #else |
| 865 | if (_rl_term_cr) |
| 866 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 867 | #endif |
| 868 | _rl_output_some_chars (local_prompt, nleft); |
| 869 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 870 | _rl_last_c_pos = _rl_col_width(local_prompt, 0, nleft)(((nleft) <= (0)) ? 0 : (nleft) - (0)); |
| 871 | else |
| 872 | _rl_last_c_pos = nleft; |
| 873 | } |
| 874 | |
| 875 | /* Where on that line? And where does that line start |
| 876 | in the buffer? */ |
| 877 | pos = inv_lbreaks[cursor_linenum]; |
| 878 | /* nleft == number of characters in the line buffer between the |
| 879 | start of the line and the cursor position. */ |
| 880 | nleft = c_pos - pos; |
| 881 | |
| 882 | /* Since _rl_backspace() doesn't know about invisible characters in the |
| 883 | prompt, and there's no good way to tell it, we compensate for |
| 884 | those characters here and call _rl_backspace() directly. */ |
| 885 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
| 886 | { |
| 887 | _rl_backspace (_rl_last_c_pos - nleft); |
| 888 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 889 | _rl_last_c_pos = _rl_col_width (&visible_line[pos], 0, nleft)(((nleft) <= (0)) ? 0 : (nleft) - (0)); |
| 890 | else |
| 891 | _rl_last_c_pos = nleft; |
| 892 | } |
| 893 | |
| 894 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 895 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
| 896 | else if (nleft != _rl_last_c_pos) |
| 897 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
| 898 | } |
| 899 | } |
| 900 | else /* Do horizontal scrolling. */ |
| 901 | { |
| 902 | #define M_OFFSET(margin, offset)((margin) == 0 ? offset : 0) ((margin) == 0 ? offset : 0) |
| 903 | int lmargin, ndisp, nleft, phys_c_pos, t; |
| 904 | |
| 905 | /* Always at top line. */ |
| 906 | _rl_last_v_pos = 0; |
| 907 | |
| 908 | /* Compute where in the buffer the displayed line should start. This |
| 909 | will be LMARGIN. */ |
| 910 | |
| 911 | /* The number of characters that will be displayed before the cursor. */ |
| 912 | ndisp = c_pos - wrap_offset; |
| 913 | nleft = prompt_visible_length + wrap_offset; |
| 914 | /* Where the new cursor position will be on the screen. This can be |
| 915 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
| 916 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
| 917 | t = _rl_screenwidth / 3; |
| 918 | |
| 919 | /* If the number of characters had already exceeded the screenwidth, |
| 920 | last_lmargin will be > 0. */ |
| 921 | |
| 922 | /* If the number of characters to be displayed is more than the screen |
| 923 | width, compute the starting offset so that the cursor is about |
| 924 | two-thirds of the way across the screen. */ |
| 925 | if (phys_c_pos > _rl_screenwidth - 2) |
| 926 | { |
| 927 | lmargin = c_pos - (2 * t); |
| 928 | if (lmargin < 0) |
| 929 | lmargin = 0; |
| 930 | /* If the left margin would be in the middle of a prompt with |
| 931 | invisible characters, don't display the prompt at all. */ |
| 932 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
| 933 | lmargin = nleft; |
| 934 | } |
| 935 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
| 936 | lmargin = 0; |
| 937 | else if (phys_c_pos < 1) |
| 938 | { |
| 939 | /* If we are moving back towards the beginning of the line and |
| 940 | the last margin is no longer correct, compute a new one. */ |
| 941 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ |
| 942 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
| 943 | lmargin = nleft; |
| 944 | } |
| 945 | else |
| 946 | lmargin = last_lmargin; |
| 947 | |
| 948 | /* If the first character on the screen isn't the first character |
| 949 | in the display line, indicate this with a special character. */ |
| 950 | if (lmargin > 0) |
| 951 | line[lmargin] = '<'; |
| 952 | |
| 953 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass |
| 954 | the whole line, indicate that with a special character at the |
| 955 | right edge of the screen. If LMARGIN is 0, we need to take the |
| 956 | wrap offset into account. */ |
| 957 | t = lmargin + M_OFFSET (lmargin, wrap_offset)((lmargin) == 0 ? wrap_offset : 0) + _rl_screenwidth; |
| 958 | if (t < out) |
| 959 | line[t - 1] = '>'; |
| 960 | |
| 961 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) |
| 962 | { |
| 963 | forced_display = 0; |
| 964 | update_line (&visible_line[last_lmargin], |
| 965 | &invisible_line[lmargin], |
| 966 | 0, |
| 967 | _rl_screenwidth + visible_wrap_offset, |
| 968 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), |
| 969 | 0); |
| 970 | |
| 971 | /* If the visible new line is shorter than the old, but the number |
| 972 | of invisible characters is greater, and we are at the end of |
| 973 | the new line, we need to clear to eol. */ |
| 974 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset)((lmargin) == 0 ? wrap_offset : 0); |
| 975 | if ((M_OFFSET (lmargin, wrap_offset)((lmargin) == 0 ? wrap_offset : 0) > visible_wrap_offset) && |
| 976 | (_rl_last_c_pos == out) && |
| 977 | t < visible_first_line_len) |
| 978 | { |
| 979 | nleft = _rl_screenwidth - t; |
| 980 | _rl_clear_to_eol (nleft); |
| 981 | } |
| 982 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset)((lmargin) == 0 ? wrap_offset : 0); |
| 983 | if (visible_first_line_len > _rl_screenwidth) |
| 984 | visible_first_line_len = _rl_screenwidth; |
| 985 | |
| 986 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); |
| 987 | last_lmargin = lmargin; |
| 988 | } |
| 989 | } |
| 990 | fflush (rl_outstream); |
| 991 | |
| 992 | /* Swap visible and non-visible lines. */ |
| 993 | { |
| 994 | char *vtemp = visible_line; |
| 995 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
| 996 | |
| 997 | visible_line = invisible_line; |
| 998 | invisible_line = vtemp; |
| 999 | |
| 1000 | vis_lbreaks = inv_lbreaks; |
| 1001 | inv_lbreaks = itemp; |
| 1002 | |
| 1003 | vis_lbsize = inv_lbsize; |
| 1004 | inv_lbsize = ntemp; |
| 1005 | |
| 1006 | rl_display_fixed = 0; |
| 1007 | /* If we are displaying on a single line, and last_lmargin is > 0, we |
| 1008 | are not displaying any invisible characters, so set visible_wrap_offset |
| 1009 | to 0. */ |
| 1010 | if (_rl_horizontal_scroll_mode && last_lmargin) |
| 1011 | visible_wrap_offset = 0; |
| 1012 | else |
| 1013 | visible_wrap_offset = wrap_offset; |
| 1014 | } |
| 1015 | } |
| 1016 | |
| 1017 | /* PWP: update_line() is based on finding the middle difference of each |
| 1018 | line on the screen; vis: |
| 1019 | |
| 1020 | /old first difference |
| 1021 | /beginning of line | /old last same /old EOL |
| 1022 | v v v v |
| 1023 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as |
| 1024 | new: eddie> Oh, my little buggy says to me, as lurgid as |
| 1025 | ^ ^ ^ ^ |
| 1026 | \beginning of line | \new last same \new end of line |
| 1027 | \new first difference |
| 1028 | |
| 1029 | All are character pointers for the sake of speed. Special cases for |
| 1030 | no differences, as well as for end of line additions must be handled. |
| 1031 | |
| 1032 | Could be made even smarter, but this works well enough */ |
| 1033 | static void |
| 1034 | update_line (old, new, current_line, omax, nmax, inv_botlin) |
| 1035 | register char *old, *new; |
| 1036 | int current_line, omax, nmax, inv_botlin; |
| 1037 | { |
| 1038 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; |
| 1039 | int temp, lendiff, wsatend, od, nd; |
| 1040 | int current_invis_chars; |
| 1041 | int col_lendiff, col_temp; |
| 1042 | #if defined (HANDLE_MULTIBYTE) |
| 1043 | mbstate_t ps_new, ps_old; |
| 1044 | int new_offset, old_offset, tmp; |
| 1045 | #endif |
| 1046 | |
| 1047 | /* If we're at the right edge of a terminal that supports xn, we're |
| 1048 | ready to wrap around, so do so. This fixes problems with knowing |
| 1049 | the exact cursor position and cut-and-paste with certain terminal |
| 1050 | emulators. In this calculation, TEMP is the physical screen |
| 1051 | position of the cursor. */ |
| 1052 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset)((_rl_last_v_pos) == 0 ? visible_wrap_offset : 0); |
| 1053 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
| 1054 | && _rl_last_v_pos == current_line - 1) |
| 1055 | { |
| 1056 | #if defined (HANDLE_MULTIBYTE) |
| 1057 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1058 | { |
| 1059 | wchar_t wc; |
| 1060 | mbstate_t ps; |
| 1061 | int tempwidth, bytes; |
| 1062 | size_t ret; |
| 1063 | |
| 1064 | /* This fixes only double-column characters, but if the wrapped |
| 1065 | character comsumes more than three columns, spaces will be |
| 1066 | inserted in the string buffer. */ |
| 1067 | if (_rl_wrapped_line[current_line] > 0) |
| 1068 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); |
| 1069 | |
| 1070 | memset (&ps, 0, sizeof (mbstate_t)); |
| 1071 | ret = mbrtowc (&wc, new, MB_CUR_MAX1, &ps); |
| 1072 | if (ret == (size_t)-1 || ret == (size_t)-2) |
| 1073 | { |
| 1074 | tempwidth = 1; |
| 1075 | ret = 1; |
| 1076 | } |
| 1077 | else if (ret == 0) |
| 1078 | tempwidth = 0; |
| 1079 | else |
| 1080 | tempwidth = wcwidth (wc); |
| 1081 | |
| 1082 | if (tempwidth > 0) |
| 1083 | { |
| 1084 | int count; |
| 1085 | bytes = ret; |
| 1086 | for (count = 0; count < bytes; count++) |
| 1087 | putc (new[count], rl_outstream)(!__isthreaded ? __sputc(new[count], rl_outstream) : (putc)(new [count], rl_outstream)); |
| 1088 | _rl_last_c_pos = tempwidth; |
| 1089 | _rl_last_v_pos++; |
| 1090 | memset (&ps, 0, sizeof (mbstate_t)); |
| 1091 | ret = mbrtowc (&wc, old, MB_CUR_MAX1, &ps); |
| 1092 | if (ret != 0 && bytes != 0) |
| 1093 | { |
| 1094 | if (ret == (size_t)-1 || ret == (size_t)-2) |
| 1095 | memmove (old+bytes, old+1, strlen (old+1)); |
| 1096 | else |
| 1097 | memmove (old+bytes, old+ret, strlen (old+ret)); |
| 1098 | memcpy (old, new, bytes); |
| 1099 | } |
| 1100 | } |
| 1101 | else |
| 1102 | { |
| 1103 | putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream )); |
| 1104 | _rl_last_c_pos = 1; |
| 1105 | _rl_last_v_pos++; |
| 1106 | if (old[0] && new[0]) |
| 1107 | old[0] = new[0]; |
| 1108 | } |
| 1109 | } |
| 1110 | else |
| 1111 | #endif |
| 1112 | { |
| 1113 | if (new[0]) |
| 1114 | putc (new[0], rl_outstream)(!__isthreaded ? __sputc(new[0], rl_outstream) : (putc)(new[0 ], rl_outstream)); |
| 1115 | else |
| 1116 | putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream )); |
| 1117 | _rl_last_c_pos = 1; /* XXX */ |
| 1118 | _rl_last_v_pos++; |
| 1119 | if (old[0] && new[0]) |
| 1120 | old[0] = new[0]; |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | |
| 1125 | /* Find first difference. */ |
| 1126 | #if defined (HANDLE_MULTIBYTE) |
| 1127 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1128 | { |
| 1129 | memset (&ps_new, 0, sizeof(mbstate_t)); |
| 1130 | memset (&ps_old, 0, sizeof(mbstate_t)); |
| 1131 | |
| 1132 | new_offset = old_offset = 0; |
| 1133 | for (ofd = old, nfd = new; |
| 1134 | (ofd - old < omax) && *ofd && |
| 1135 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) |
| 1136 | { |
| 1137 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY)((old_offset) + (1)); |
| 1138 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY)((new_offset) + (1)); |
| 1139 | ofd = old + old_offset; |
| 1140 | nfd = new + new_offset; |
| 1141 | } |
| 1142 | } |
| 1143 | else |
| 1144 | #endif |
| 1145 | for (ofd = old, nfd = new; |
| 1146 | (ofd - old < omax) && *ofd && (*ofd == *nfd); |
| 1147 | ofd++, nfd++) |
| 1148 | ; |
| 1149 | |
| 1150 | /* Move to the end of the screen line. ND and OD are used to keep track |
| 1151 | of the distance between ne and new and oe and old, respectively, to |
| 1152 | move a subtraction out of each loop. */ |
| 1153 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); |
| 1154 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); |
| 1155 | |
| 1156 | /* If no difference, continue to next line. */ |
| 1157 | if (ofd == oe && nfd == ne) |
| 1158 | return; |
| 1159 | |
| 1160 | wsatend = 1; /* flag for trailing whitespace */ |
| 1161 | |
| 1162 | #if defined (HANDLE_MULTIBYTE) |
| 1163 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1164 | { |
| 1165 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY)(((oe - old) == 0) ? (oe - old) : ((oe - old) - 1)); |
| 1166 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY)(((ne - new) == 0) ? (ne - new) : ((ne - new) - 1)); |
| 1167 | while ((ols > ofd) && (nls > nfd)) |
| 1168 | { |
| 1169 | memset (&ps_old, 0, sizeof (mbstate_t)); |
| 1170 | memset (&ps_new, 0, sizeof (mbstate_t)); |
| 1171 | |
| 1172 | _rl_adjust_point (old, ols - old, &ps_old); |
| 1173 | _rl_adjust_point (new, nls - new, &ps_new); |
| 1174 | |
| 1175 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) |
| 1176 | break; |
| 1177 | |
| 1178 | if (*ols == ' ') |
| 1179 | wsatend = 0; |
| 1180 | |
| 1181 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY)(((ols - old) == 0) ? (ols - old) : ((ols - old) - 1)); |
| 1182 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY)(((nls - new) == 0) ? (nls - new) : ((nls - new) - 1)); |
| 1183 | } |
| 1184 | } |
| 1185 | else |
| 1186 | { |
| 1187 | #endif /* HANDLE_MULTIBYTE */ |
| 1188 | ols = oe - 1; /* find last same */ |
| 1189 | nls = ne - 1; |
| 1190 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) |
| 1191 | { |
| 1192 | if (*ols != ' ') |
| 1193 | wsatend = 0; |
| 1194 | ols--; |
| 1195 | nls--; |
| 1196 | } |
| 1197 | #if defined (HANDLE_MULTIBYTE) |
| 1198 | } |
| 1199 | #endif |
| 1200 | |
| 1201 | if (wsatend) |
| 1202 | { |
| 1203 | ols = oe; |
| 1204 | nls = ne; |
| 1205 | } |
| 1206 | #if defined (HANDLE_MULTIBYTE) |
| 1207 | /* This may not work for stateful encoding, but who cares? To handle |
| 1208 | stateful encoding properly, we have to scan each string from the |
| 1209 | beginning and compare. */ |
| 1210 | else if (_rl_compare_chars (ols, 0, NULL((void *)0), nls, 0, NULL((void *)0)) == 0) |
| 1211 | #else |
| 1212 | else if (*ols != *nls) |
| 1213 | #endif |
| 1214 | { |
| 1215 | if (*ols) /* don't step past the NUL */ |
| 1216 | { |
| 1217 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1218 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY)((ols - old) + (1)); |
| 1219 | else |
| 1220 | ols++; |
| 1221 | } |
| 1222 | if (*nls) |
| 1223 | { |
| 1224 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1225 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY)((nls - new) + (1)); |
| 1226 | else |
| 1227 | nls++; |
| 1228 | } |
| 1229 | } |
| 1230 | |
| 1231 | /* count of invisible characters in the current invisible line. */ |
| 1232 | current_invis_chars = W_OFFSET (current_line, wrap_offset)((current_line) == 0 ? wrap_offset : 0); |
| 1233 | if (_rl_last_v_pos != current_line) |
| 1234 | { |
| 1235 | _rl_move_vert (current_line); |
| 1236 | if (current_line == 0 && visible_wrap_offset) |
| 1237 | _rl_last_c_pos += visible_wrap_offset; |
| 1238 | } |
| 1239 | |
| 1240 | /* If this is the first line and there are invisible characters in the |
| 1241 | prompt string, and the prompt string has not changed, and the current |
| 1242 | cursor position is before the last invisible character in the prompt, |
| 1243 | and the index of the character to move to is past the end of the prompt |
| 1244 | string, then redraw the entire prompt string. We can only do this |
| 1245 | reliably if the terminal supports a `cr' capability. |
| 1246 | |
| 1247 | This is not an efficiency hack -- there is a problem with redrawing |
| 1248 | portions of the prompt string if they contain terminal escape |
| 1249 | sequences (like drawing the `unbold' sequence without a corresponding |
| 1250 | `bold') that manifests itself on certain terminals. */ |
| 1251 | |
| 1252 | lendiff = local_prompt ? strlen (local_prompt) : 0; |
| 1253 | od = ofd - old; /* index of first difference in visible line */ |
| 1254 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
| 1255 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
| 1256 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) |
| 1257 | { |
| 1258 | #if defined (__MSDOS__) |
| 1259 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
| 1260 | #else |
| 1261 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1262 | #endif |
| 1263 | _rl_output_some_chars (local_prompt, lendiff); |
| 1264 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1265 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff)(((lendiff) <= (0)) ? 0 : (lendiff) - (0)); |
| 1266 | else |
| 1267 | _rl_last_c_pos = lendiff; |
| 1268 | } |
| 1269 | |
| 1270 | _rl_move_cursor_relative (od, old); |
| 1271 | |
| 1272 | /* if (len (new) > len (old)) |
| 1273 | lendiff == difference in buffer |
| 1274 | col_lendiff == difference on screen |
| 1275 | When not using multibyte characters, these are equal */ |
| 1276 | lendiff = (nls - nfd) - (ols - ofd); |
| 1277 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1278 | col_lendiff = _rl_col_width (new, nfd - new, nls - new)(((nls - new) <= (nfd - new)) ? 0 : (nls - new) - (nfd - new )) - _rl_col_width (old, ofd - old, ols - old)(((ols - old) <= (ofd - old)) ? 0 : (ols - old) - (ofd - old )); |
| 1279 | else |
| 1280 | col_lendiff = lendiff; |
| 1281 | |
| 1282 | /* If we are changing the number of invisible characters in a line, and |
| 1283 | the spot of first difference is before the end of the invisible chars, |
| 1284 | lendiff needs to be adjusted. */ |
| 1285 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
| 1286 | current_invis_chars != visible_wrap_offset) |
| 1287 | { |
| 1288 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1289 | { |
| 1290 | lendiff += visible_wrap_offset - current_invis_chars; |
| 1291 | col_lendiff += visible_wrap_offset - current_invis_chars; |
| 1292 | } |
| 1293 | else |
| 1294 | { |
| 1295 | lendiff += visible_wrap_offset - current_invis_chars; |
| 1296 | col_lendiff = lendiff; |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | /* Insert (diff (len (old), len (new)) ch. */ |
| 1301 | temp = ne - nfd; |
| 1302 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1303 | col_temp = _rl_col_width (new, nfd - new, ne - new)(((ne - new) <= (nfd - new)) ? 0 : (ne - new) - (nfd - new )); |
| 1304 | else |
| 1305 | col_temp = temp; |
| 1306 | |
| 1307 | if (col_lendiff > 0) /* XXX - was lendiff */ |
| 1308 | { |
| 1309 | /* Non-zero if we're increasing the number of lines. */ |
| 1310 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; |
| 1311 | /* Sometimes it is cheaper to print the characters rather than |
| 1312 | use the terminal's capabilities. If we're growing the number |
| 1313 | of lines, make sure we actually cause the new line to wrap |
| 1314 | around on auto-wrapping terminals. */ |
| 1315 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
| 1316 | { |
| 1317 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
| 1318 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
| 1319 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
| 1320 | invisible characters. We need to just draw them. */ |
| 1321 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || |
| 1322 | lendiff <= prompt_visible_length || !current_invis_chars)) |
| 1323 | { |
| 1324 | insert_some_chars (nfd, lendiff, col_lendiff); |
| 1325 | _rl_last_c_pos += col_lendiff; |
| 1326 | } |
| 1327 | else if (*ols == 0) |
| 1328 | { |
| 1329 | /* At the end of a line the characters do not have to |
| 1330 | be "inserted". They can just be placed on the screen. */ |
| 1331 | /* However, this screws up the rest of this block, which |
| 1332 | assumes you've done the insert because you can. */ |
| 1333 | _rl_output_some_chars (nfd, lendiff); |
| 1334 | _rl_last_c_pos += col_lendiff; |
| 1335 | } |
| 1336 | else |
| 1337 | { |
| 1338 | /* We have horizontal scrolling and we are not inserting at |
| 1339 | the end. We have invisible characters in this line. This |
| 1340 | is a dumb update. */ |
| 1341 | _rl_output_some_chars (nfd, temp); |
| 1342 | _rl_last_c_pos += col_temp; |
| 1343 | return; |
| 1344 | } |
| 1345 | /* Copy (new) chars to screen from first diff to last match. */ |
| 1346 | temp = nls - nfd; |
| 1347 | if ((temp - lendiff) > 0) |
| 1348 | { |
| 1349 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); |
| 1350 | #if 0 |
| 1351 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff)(((temp-col_lendiff) <= (0)) ? 0 : (temp-col_lendiff) - (0 )); |
| 1352 | #else |
| 1353 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff)(((temp-lendiff) <= (0)) ? 0 : (temp-lendiff) - (0)); |
| 1354 | #endif |
| 1355 | } |
| 1356 | } |
| 1357 | else |
| 1358 | { |
| 1359 | /* cannot insert chars, write to EOL */ |
| 1360 | _rl_output_some_chars (nfd, temp); |
| 1361 | _rl_last_c_pos += col_temp; |
| 1362 | } |
| 1363 | } |
| 1364 | else /* Delete characters from line. */ |
| 1365 | { |
| 1366 | /* If possible and inexpensive to use terminal deletion, then do so. */ |
| 1367 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
| 1368 | { |
| 1369 | /* If all we're doing is erasing the invisible characters in the |
| 1370 | prompt string, don't bother. It screws up the assumptions |
| 1371 | about what's on the screen. */ |
| 1372 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && |
| 1373 | -lendiff == visible_wrap_offset) |
| 1374 | col_lendiff = 0; |
| 1375 | |
| 1376 | if (col_lendiff) |
| 1377 | delete_chars (-col_lendiff); /* delete (diff) characters */ |
| 1378 | |
| 1379 | /* Copy (new) chars to screen from first diff to last match */ |
| 1380 | temp = nls - nfd; |
| 1381 | if (temp > 0) |
| 1382 | { |
| 1383 | _rl_output_some_chars (nfd, temp); |
| 1384 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp)(((temp) <= (0)) ? 0 : (temp) - (0));; |
| 1385 | } |
| 1386 | } |
| 1387 | /* Otherwise, print over the existing material. */ |
| 1388 | else |
| 1389 | { |
| 1390 | if (temp > 0) |
| 1391 | { |
| 1392 | _rl_output_some_chars (nfd, temp); |
| 1393 | _rl_last_c_pos += col_temp; |
| 1394 | } |
| 1395 | lendiff = (oe - old) - (ne - new); |
| 1396 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1397 | col_lendiff = _rl_col_width (old, 0, oe - old)(((oe - old) <= (0)) ? 0 : (oe - old) - (0)) - _rl_col_width (new, 0, ne - new)(((ne - new) <= (0)) ? 0 : (ne - new) - (0)); |
| 1398 | else |
| 1399 | col_lendiff = lendiff; |
| 1400 | |
| 1401 | if (col_lendiff) |
| 1402 | { |
| 1403 | if (_rl_term_autowrap && current_line < inv_botlin) |
| 1404 | space_to_eol (col_lendiff); |
| 1405 | else |
| 1406 | _rl_clear_to_eol (col_lendiff); |
| 1407 | } |
| 1408 | } |
| 1409 | } |
| 1410 | } |
| 1411 | |
| 1412 | /* Tell the update routines that we have moved onto a new (empty) line. */ |
| 1413 | int |
| 1414 | rl_on_new_line () |
| 1415 | { |
| 1416 | if (visible_line) |
| 1417 | visible_line[0] = '\0'; |
| 1418 | |
| 1419 | _rl_last_c_pos = _rl_last_v_pos = 0; |
| 1420 | _rl_vis_botlin = last_lmargin = 0; |
| 1421 | if (vis_lbreaks) |
| 1422 | vis_lbreaks[0] = vis_lbreaks[1] = 0; |
| 1423 | visible_wrap_offset = 0; |
| 1424 | return 0; |
| 1425 | } |
| 1426 | |
| 1427 | /* Tell the update routines that we have moved onto a new line with the |
| 1428 | prompt already displayed. Code originally from the version of readline |
| 1429 | distributed with CLISP. */ |
| 1430 | int |
| 1431 | rl_on_new_line_with_prompt () |
| 1432 | { |
| 1433 | int prompt_size, i, l, real_screenwidth, newlines; |
| 1434 | char *prompt_last_line; |
| 1435 | |
| 1436 | /* Initialize visible_line and invisible_line to ensure that they can hold |
| 1437 | the already-displayed prompt. */ |
| 1438 | prompt_size = strlen (rl_prompt) + 1; |
| 1439 | init_line_structures (prompt_size); |
| 1440 | |
| 1441 | /* Make sure the line structures hold the already-displayed prompt for |
| 1442 | redisplay. */ |
| 1443 | strlcpy (visible_line, rl_prompt, line_size); |
| 1444 | strlcpy (invisible_line, rl_prompt, line_size); |
| 1445 | |
| 1446 | /* If the prompt contains newlines, take the last tail. */ |
| 1447 | prompt_last_line = strrchr (rl_prompt, '\n'); |
| 1448 | if (!prompt_last_line) |
| 1449 | prompt_last_line = rl_prompt; |
| 1450 | |
| 1451 | l = strlen (prompt_last_line); |
| 1452 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1453 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l)(((l) <= (0)) ? 0 : (l) - (0)); |
| 1454 | else |
| 1455 | _rl_last_c_pos = l; |
| 1456 | |
| 1457 | /* Dissect prompt_last_line into screen lines. Note that here we have |
| 1458 | to use the real screenwidth. Readline's notion of screenwidth might be |
| 1459 | one less, see terminal.c. */ |
| 1460 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
| 1461 | _rl_last_v_pos = l / real_screenwidth; |
| 1462 | /* If the prompt length is a multiple of real_screenwidth, we don't know |
| 1463 | whether the cursor is at the end of the last line, or already at the |
| 1464 | beginning of the next line. Output a newline just to be safe. */ |
| 1465 | if (l > 0 && (l % real_screenwidth) == 0) |
| 1466 | _rl_output_some_chars ("\n", 1); |
| 1467 | last_lmargin = 0; |
| 1468 | |
| 1469 | newlines = 0; i = 0; |
| 1470 | while (i <= l) |
| 1471 | { |
| 1472 | _rl_vis_botlin = newlines; |
| 1473 | vis_lbreaks[newlines++] = i; |
| 1474 | i += real_screenwidth; |
| 1475 | } |
| 1476 | vis_lbreaks[newlines] = l; |
| 1477 | visible_wrap_offset = 0; |
| 1478 | |
| 1479 | return 0; |
| 1480 | } |
| 1481 | |
| 1482 | /* Actually update the display, period. */ |
| 1483 | int |
| 1484 | rl_forced_update_display () |
| 1485 | { |
| 1486 | if (visible_line) |
| 1487 | { |
| 1488 | register char *temp = visible_line; |
| 1489 | |
| 1490 | while (*temp) |
| 1491 | *temp++ = '\0'; |
| 1492 | } |
| 1493 | rl_on_new_line (); |
| 1494 | forced_display++; |
| 1495 | (*rl_redisplay_function) (); |
| 1496 | return 0; |
| 1497 | } |
| 1498 | |
| 1499 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. |
| 1500 | DATA is the contents of the screen line of interest; i.e., where |
| 1501 | the movement is being done. */ |
| 1502 | void |
| 1503 | _rl_move_cursor_relative (new, data) |
| 1504 | int new; |
| 1505 | const char *data; |
| 1506 | { |
| 1507 | register int i; |
| 1508 | |
| 1509 | /* If we don't have to do anything, then return. */ |
| 1510 | #if defined (HANDLE_MULTIBYTE) |
| 1511 | /* If we have multibyte characters, NEW is indexed by the buffer point in |
| 1512 | a multibyte string, but _rl_last_c_pos is the display position. In |
| 1513 | this case, NEW's display position is not obvious and must be |
| 1514 | calculated. */ |
| 1515 | if (MB_CUR_MAX1 == 1 || rl_byte_oriented) |
| 1516 | { |
| 1517 | if (_rl_last_c_pos == new) |
| 1518 | return; |
| 1519 | } |
| 1520 | else if (_rl_last_c_pos == _rl_col_width (data, 0, new)(((new) <= (0)) ? 0 : (new) - (0))) |
| 1521 | return; |
| 1522 | #else |
| 1523 | if (_rl_last_c_pos == new) return; |
| 1524 | #endif |
| 1525 | |
| 1526 | /* It may be faster to output a CR, and then move forwards instead |
| 1527 | of moving backwards. */ |
| 1528 | /* i == current physical cursor position. */ |
| 1529 | i = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset)((_rl_last_v_pos) == 0 ? visible_wrap_offset : 0); |
| 1530 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos)(((new) + 1) < ((_rl_last_c_pos) - (new))) || |
| 1531 | (_rl_term_autowrap && i == _rl_screenwidth)) |
| 1532 | { |
| 1533 | #if defined (__MSDOS__) |
| 1534 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
| 1535 | #else |
| 1536 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1537 | #endif /* !__MSDOS__ */ |
| 1538 | _rl_last_c_pos = 0; |
| 1539 | } |
| 1540 | |
| 1541 | if (_rl_last_c_pos < new) |
| 1542 | { |
| 1543 | /* Move the cursor forward. We do it by printing the command |
| 1544 | to move the cursor forward if there is one, else print that |
| 1545 | portion of the output buffer again. Which is cheaper? */ |
| 1546 | |
| 1547 | /* The above comment is left here for posterity. It is faster |
| 1548 | to print one character (non-control) than to print a control |
| 1549 | sequence telling the terminal to move forward one character. |
| 1550 | That kind of control is for people who don't know what the |
| 1551 | data is underneath the cursor. */ |
| 1552 | #if defined (HACK_TERMCAP_MOTION) |
| 1553 | if (_rl_term_forward_char) |
| 1554 | { |
| 1555 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1556 | { |
| 1557 | int width; |
| 1558 | width = _rl_col_width (data, _rl_last_c_pos, new)(((new) <= (_rl_last_c_pos)) ? 0 : (new) - (_rl_last_c_pos )); |
| 1559 | for (i = 0; i < width; i++) |
| 1560 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); |
| 1561 | } |
| 1562 | else |
| 1563 | { |
| 1564 | for (i = _rl_last_c_pos; i < new; i++) |
| 1565 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); |
| 1566 | } |
| 1567 | } |
| 1568 | else if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1569 | { |
| 1570 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1571 | for (i = 0; i < new; i++) |
| 1572 | putc (data[i], rl_outstream)(!__isthreaded ? __sputc(data[i], rl_outstream) : (putc)(data [i], rl_outstream)); |
| 1573 | } |
| 1574 | else |
| 1575 | for (i = _rl_last_c_pos; i < new; i++) |
| 1576 | putc (data[i], rl_outstream)(!__isthreaded ? __sputc(data[i], rl_outstream) : (putc)(data [i], rl_outstream)); |
| 1577 | |
| 1578 | #else /* !HACK_TERMCAP_MOTION */ |
| 1579 | |
| 1580 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1581 | { |
| 1582 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1583 | for (i = 0; i < new; i++) |
| 1584 | putc (data[i], rl_outstream)(!__isthreaded ? __sputc(data[i], rl_outstream) : (putc)(data [i], rl_outstream)); |
| 1585 | } |
| 1586 | else |
| 1587 | for (i = _rl_last_c_pos; i < new; i++) |
| 1588 | putc (data[i], rl_outstream)(!__isthreaded ? __sputc(data[i], rl_outstream) : (putc)(data [i], rl_outstream)); |
| 1589 | |
| 1590 | #endif /* !HACK_TERMCAP_MOTION */ |
| 1591 | |
| 1592 | } |
| 1593 | #if defined (HANDLE_MULTIBYTE) |
| 1594 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. |
| 1595 | The byte length of the string is probably bigger than the column width |
| 1596 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's |
| 1597 | display point is less than _rl_last_c_pos. */ |
| 1598 | else if (_rl_last_c_pos >= new) |
| 1599 | #else |
| 1600 | else if (_rl_last_c_pos > new) |
| 1601 | #endif |
| 1602 | { |
| 1603 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1604 | _rl_backspace (_rl_last_c_pos - _rl_col_width (data, 0, new)(((new) <= (0)) ? 0 : (new) - (0))); |
| 1605 | else |
| 1606 | _rl_backspace (_rl_last_c_pos - new); |
| 1607 | } |
| 1608 | |
| 1609 | if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0) |
| 1610 | _rl_last_c_pos = _rl_col_width (data, 0, new)(((new) <= (0)) ? 0 : (new) - (0)); |
| 1611 | else |
| 1612 | _rl_last_c_pos = new; |
| 1613 | } |
| 1614 | |
| 1615 | /* PWP: move the cursor up or down. */ |
| 1616 | void |
| 1617 | _rl_move_vert (to) |
| 1618 | int to; |
| 1619 | { |
| 1620 | register int delta, i; |
| 1621 | |
| 1622 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
| 1623 | return; |
| 1624 | |
| 1625 | if ((delta = to - _rl_last_v_pos) > 0) |
| 1626 | { |
| 1627 | for (i = 0; i < delta; i++) |
| 1628 | putc ('\n', rl_outstream)(!__isthreaded ? __sputc('\n', rl_outstream) : (putc)('\n', rl_outstream )); |
| 1629 | #if defined (__MSDOS__) |
| 1630 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
| 1631 | #else |
| 1632 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1633 | #endif |
| 1634 | _rl_last_c_pos = 0; |
| 1635 | } |
| 1636 | else |
| 1637 | { /* delta < 0 */ |
| 1638 | if (_rl_term_up && *_rl_term_up) |
| 1639 | for (i = 0; i < -delta; i++) |
| 1640 | tputs (_rl_term_up, 1, _rl_output_character_function); |
| 1641 | } |
| 1642 | |
| 1643 | _rl_last_v_pos = to; /* Now TO is here */ |
| 1644 | } |
| 1645 | |
| 1646 | /* Physically print C on rl_outstream. This is for functions which know |
| 1647 | how to optimize the display. Return the number of characters output. */ |
| 1648 | int |
| 1649 | rl_show_char (c) |
| 1650 | int c; |
| 1651 | { |
| 1652 | int n = 1; |
| 1653 | if (META_CHAR (c)((c) > 0x07f && (c) <= 255) && (_rl_output_meta_chars == 0)) |
| 1654 | { |
| 1655 | fprintf (rl_outstream, "M-"); |
| 1656 | n += 2; |
| 1657 | c = UNMETA (c)((c) & (~0x080)); |
| 1658 | } |
| 1659 | |
| 1660 | #if defined (DISPLAY_TABS) |
| 1661 | if ((CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) && c != '\t') || c == RUBOUT0x7f) |
| 1662 | #else |
| 1663 | if (CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) || c == RUBOUT0x7f) |
| 1664 | #endif /* !DISPLAY_TABS */ |
| 1665 | { |
| 1666 | fprintf (rl_outstream, "C-"); |
| 1667 | n += 2; |
| 1668 | c = CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) ? UNCTRL (c)((((unsigned char)(((c)|0x40)) == (((c)|0x40))) && (isascii (((c)|0x40)) && islower (((c)|0x40)))) ? toupper((unsigned char)((c)|0x40)) : (((c)|0x40))) : '?'; |
| 1669 | } |
| 1670 | |
| 1671 | putc (c, rl_outstream)(!__isthreaded ? __sputc(c, rl_outstream) : (putc)(c, rl_outstream )); |
| 1672 | fflush (rl_outstream); |
| 1673 | return n; |
| 1674 | } |
| 1675 | |
| 1676 | int |
| 1677 | rl_character_len (c, pos) |
| 1678 | register int c, pos; |
| 1679 | { |
| 1680 | unsigned char uc; |
| 1681 | |
| 1682 | uc = (unsigned char)c; |
| 1683 | |
| 1684 | if (META_CHAR (uc)((uc) > 0x07f && (uc) <= 255)) |
| 1685 | return ((_rl_output_meta_chars == 0) ? 4 : 1); |
| 1686 | |
| 1687 | if (uc == '\t') |
| 1688 | { |
| 1689 | #if defined (DISPLAY_TABS) |
| 1690 | return (((pos | 7) + 1) - pos); |
| 1691 | #else |
| 1692 | return (2); |
| 1693 | #endif /* !DISPLAY_TABS */ |
| 1694 | } |
| 1695 | |
| 1696 | if (CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0)) || c == RUBOUT0x7f) |
| 1697 | return (2); |
| 1698 | |
| 1699 | return ((ISPRINT (uc)(isascii(uc) && isprint (uc))) ? 1 : 2); |
| 1700 | } |
| 1701 | |
| 1702 | /* How to print things in the "echo-area". The prompt is treated as a |
| 1703 | mini-modeline. */ |
| 1704 | |
| 1705 | #if defined (USE_VARARGS) |
| 1706 | int |
| 1707 | #if defined (PREFER_STDARG) |
| 1708 | rl_message (const char *format, ...) |
| 1709 | #else |
| 1710 | rl_message (va_alist) |
| 1711 | va_dcl |
| 1712 | #endif |
| 1713 | { |
| 1714 | va_list args; |
| 1715 | #if defined (PREFER_VARARGS) |
| 1716 | char *format; |
| 1717 | #endif |
| 1718 | |
| 1719 | #if defined (PREFER_STDARG) |
| 1720 | va_start (args, format)__builtin_va_start(args, format); |
| 1721 | #else |
| 1722 | va_start (args); |
| 1723 | format = va_arg (args, char *)__builtin_va_arg(args, char *); |
| 1724 | #endif |
| 1725 | |
| 1726 | #if defined (HAVE_VSNPRINTF1) |
| 1727 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); |
| 1728 | #else |
| 1729 | vsprintf (msg_buf, format, args); |
| 1730 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
| 1731 | #endif |
| 1732 | va_end (args)__builtin_va_end(args); |
| 1733 | |
| 1734 | rl_display_prompt = msg_buf; |
| 1735 | (*rl_redisplay_function) (); |
| 1736 | return 0; |
| 1737 | } |
| 1738 | #else /* !USE_VARARGS */ |
| 1739 | int |
| 1740 | rl_message (format, arg1, arg2) |
| 1741 | char *format; |
| 1742 | { |
| 1743 | snprintf (msg_buf, sizeof(msg_buf), format, arg1, arg2); |
| 1744 | rl_display_prompt = msg_buf; |
| 1745 | (*rl_redisplay_function) (); |
| 1746 | return 0; |
| 1747 | } |
| 1748 | #endif /* !USE_VARARGS */ |
| 1749 | |
| 1750 | /* How to clear things from the "echo-area". */ |
| 1751 | int |
| 1752 | rl_clear_message () |
| 1753 | { |
| 1754 | rl_display_prompt = rl_prompt; |
| 1755 | (*rl_redisplay_function) (); |
| 1756 | return 0; |
| 1757 | } |
| 1758 | |
| 1759 | int |
| 1760 | rl_reset_line_state () |
| 1761 | { |
| 1762 | rl_on_new_line (); |
| 1763 | |
| 1764 | rl_display_prompt = rl_prompt ? rl_prompt : ""; |
| 1765 | forced_display = 1; |
| 1766 | return 0; |
| 1767 | } |
| 1768 | |
| 1769 | static char *saved_local_prompt; |
| 1770 | static char *saved_local_prefix; |
| 1771 | static int saved_last_invisible; |
| 1772 | static int saved_visible_length; |
| 1773 | |
| 1774 | void |
| 1775 | rl_save_prompt () |
| 1776 | { |
| 1777 | saved_local_prompt = local_prompt; |
| 1778 | saved_local_prefix = local_prompt_prefix; |
| 1779 | saved_last_invisible = prompt_last_invisible; |
| 1780 | saved_visible_length = prompt_visible_length; |
| 1781 | |
| 1782 | local_prompt = local_prompt_prefix = (char *)0; |
| 1783 | prompt_last_invisible = prompt_visible_length = 0; |
| 1784 | } |
| 1785 | |
| 1786 | void |
| 1787 | rl_restore_prompt () |
| 1788 | { |
| 1789 | FREE (local_prompt)if (local_prompt) free (local_prompt); |
| 1790 | FREE (local_prompt_prefix)if (local_prompt_prefix) free (local_prompt_prefix); |
| 1791 | |
| 1792 | local_prompt = saved_local_prompt; |
| 1793 | local_prompt_prefix = saved_local_prefix; |
| 1794 | prompt_last_invisible = saved_last_invisible; |
| 1795 | prompt_visible_length = saved_visible_length; |
| 1796 | } |
| 1797 | |
| 1798 | char * |
| 1799 | _rl_make_prompt_for_search (pchar) |
| 1800 | int pchar; |
| 1801 | { |
| 1802 | int len; |
| 1803 | char *pmt; |
| 1804 | |
| 1805 | rl_save_prompt (); |
| 1806 | |
| 1807 | if (saved_local_prompt == 0) |
| 1808 | { |
| 1809 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; |
| 1810 | pmt = (char *)xmalloc (len + 2); |
| 1811 | if (len) |
| 1812 | strlcpy (pmt, rl_prompt, len + 2); |
| 1813 | pmt[len] = pchar; |
| 1814 | pmt[len+1] = '\0'; |
| 1815 | } |
| 1816 | else |
| 1817 | { |
| 1818 | len = *saved_local_prompt ? strlen (saved_local_prompt) : 0; |
| 1819 | pmt = (char *)xmalloc (len + 2); |
| 1820 | if (len) |
| 1821 | strlcpy (pmt, saved_local_prompt, len + 2); |
| 1822 | pmt[len] = pchar; |
| 1823 | pmt[len+1] = '\0'; |
| 1824 | local_prompt = savestring (pmt)xstrdup(pmt); |
| 1825 | prompt_last_invisible = saved_last_invisible; |
| 1826 | prompt_visible_length = saved_visible_length + 1; |
| 1827 | } |
| 1828 | return pmt; |
| 1829 | } |
| 1830 | |
| 1831 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
| 1832 | void |
| 1833 | _rl_erase_at_end_of_line (l) |
| 1834 | int l; |
| 1835 | { |
| 1836 | register int i; |
| 1837 | |
| 1838 | _rl_backspace (l); |
| 1839 | for (i = 0; i < l; i++) |
| 1840 | putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream )); |
| 1841 | _rl_backspace (l); |
| 1842 | for (i = 0; i < l; i++) |
| 1843 | visible_line[--_rl_last_c_pos] = '\0'; |
| 1844 | rl_display_fixed++; |
| 1845 | } |
| 1846 | |
| 1847 | /* Clear to the end of the line. COUNT is the minimum |
| 1848 | number of character spaces to clear, */ |
| 1849 | void |
| 1850 | _rl_clear_to_eol (count) |
| 1851 | int count; |
| 1852 | { |
| 1853 | if (_rl_term_clreol) |
| 1854 | tputs (_rl_term_clreol, 1, _rl_output_character_function); |
| 1855 | else if (count) |
| 1856 | space_to_eol (count); |
| 1857 | } |
| 1858 | |
| 1859 | /* Clear to the end of the line using spaces. COUNT is the minimum |
| 1860 | number of character spaces to clear, */ |
| 1861 | static void |
| 1862 | space_to_eol (count) |
| 1863 | int count; |
| 1864 | { |
| 1865 | register int i; |
| 1866 | |
| 1867 | for (i = 0; i < count; i++) |
| 1868 | putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream )); |
| 1869 | |
| 1870 | _rl_last_c_pos += count; |
| 1871 | } |
| 1872 | |
| 1873 | void |
| 1874 | _rl_clear_screen () |
| 1875 | { |
| 1876 | if (_rl_term_clrpag) |
| 1877 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); |
| 1878 | else |
| 1879 | rl_crlf (); |
| 1880 | } |
| 1881 | |
| 1882 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
| 1883 | static void |
| 1884 | insert_some_chars (string, count, col) |
| 1885 | char *string; |
| 1886 | int count, col; |
| 1887 | { |
| 1888 | /* DEBUGGING */ |
| 1889 | if (MB_CUR_MAX1 == 1 || rl_byte_oriented) |
| 1890 | if (count != col) |
| 1891 | fprintf(stderr(&__sF[2]), "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); |
| 1892 | |
| 1893 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
| 1894 | if (_rl_term_IC) |
| 1895 | { |
| 1896 | char *buffer; |
| 1897 | |
| 1898 | buffer = tgoto (_rl_term_IC, 0, col); |
| 1899 | tputs (buffer, 1, _rl_output_character_function); |
| 1900 | _rl_output_some_chars (string, count); |
| 1901 | } |
| 1902 | else |
| 1903 | { |
| 1904 | register int i; |
| 1905 | |
| 1906 | /* If we have to turn on insert-mode, then do so. */ |
| 1907 | if (_rl_term_im && *_rl_term_im) |
| 1908 | tputs (_rl_term_im, 1, _rl_output_character_function); |
| 1909 | |
| 1910 | /* If there is a special command for inserting characters, then |
| 1911 | use that first to open up the space. */ |
| 1912 | if (_rl_term_ic && *_rl_term_ic) |
| 1913 | { |
| 1914 | for (i = col; i--; ) |
| 1915 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
| 1916 | } |
| 1917 | |
| 1918 | /* Print the text. */ |
| 1919 | _rl_output_some_chars (string, count); |
| 1920 | |
| 1921 | /* If there is a string to turn off insert mode, we had best use |
| 1922 | it now. */ |
| 1923 | if (_rl_term_ei && *_rl_term_ei) |
| 1924 | tputs (_rl_term_ei, 1, _rl_output_character_function); |
| 1925 | } |
| 1926 | } |
| 1927 | |
| 1928 | /* Delete COUNT characters from the display line. */ |
| 1929 | static void |
| 1930 | delete_chars (count) |
| 1931 | int count; |
| 1932 | { |
| 1933 | if (count > _rl_screenwidth) /* XXX */ |
| 1934 | return; |
| 1935 | |
| 1936 | if (_rl_term_DC && *_rl_term_DC) |
| 1937 | { |
| 1938 | char *buffer; |
| 1939 | buffer = tgoto (_rl_term_DC, count, count); |
| 1940 | tputs (buffer, count, _rl_output_character_function); |
| 1941 | } |
| 1942 | else |
| 1943 | { |
| 1944 | if (_rl_term_dc && *_rl_term_dc) |
| 1945 | while (count--) |
| 1946 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | void |
| 1951 | _rl_update_final () |
| 1952 | { |
| 1953 | int full_lines; |
| 1954 | |
| 1955 | full_lines = 0; |
| 1956 | /* If the cursor is the only thing on an otherwise-blank last line, |
| 1957 | compensate so we don't print an extra CRLF. */ |
| 1958 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && |
| 1959 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
| 1960 | { |
| 1961 | _rl_vis_botlin--; |
| 1962 | full_lines = 1; |
| 1963 | } |
| 1964 | _rl_move_vert (_rl_vis_botlin); |
| 1965 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
| 1966 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin)((_rl_vis_botlin) > _rl_vis_botlin ? 0 : (vis_lbreaks[_rl_vis_botlin +1] - vis_lbreaks[_rl_vis_botlin])) == _rl_screenwidth)) |
| 1967 | { |
| 1968 | char *last_line; |
| 1969 | |
| 1970 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
| 1971 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
| 1972 | _rl_clear_to_eol (0); |
| 1973 | putc (last_line[_rl_screenwidth - 1], rl_outstream)(!__isthreaded ? __sputc(last_line[_rl_screenwidth - 1], rl_outstream ) : (putc)(last_line[_rl_screenwidth - 1], rl_outstream)); |
| 1974 | } |
| 1975 | _rl_vis_botlin = 0; |
| 1976 | rl_crlf (); |
| 1977 | fflush (rl_outstream); |
| 1978 | rl_display_fixed++; |
| 1979 | } |
| 1980 | |
| 1981 | /* Move to the start of the current line. */ |
| 1982 | static void |
| 1983 | cr () |
| 1984 | { |
| 1985 | if (_rl_term_cr) |
| 1986 | { |
| 1987 | #if defined (__MSDOS__) |
| 1988 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
| 1989 | #else |
| 1990 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1991 | #endif |
| 1992 | _rl_last_c_pos = 0; |
| 1993 | } |
| 1994 | } |
| 1995 | |
| 1996 | /* Redraw the last line of a multi-line prompt that may possibly contain |
| 1997 | terminal escape sequences. Called with the cursor at column 0 of the |
| 1998 | line to draw the prompt on. */ |
| 1999 | static void |
| 2000 | redraw_prompt (t) |
| 2001 | char *t; |
| 2002 | { |
| 2003 | char *oldp, *oldl, *oldlprefix; |
| 2004 | int oldlen, oldlast, oldplen, oldninvis; |
| 2005 | |
| 2006 | /* Geez, I should make this a struct. */ |
| 2007 | oldp = rl_display_prompt; |
| 2008 | oldl = local_prompt; |
| 2009 | oldlprefix = local_prompt_prefix; |
| 2010 | oldlen = prompt_visible_length; |
| 2011 | oldplen = prompt_prefix_length; |
| 2012 | oldlast = prompt_last_invisible; |
| 2013 | oldninvis = prompt_invis_chars_first_line; |
| 2014 | |
| 2015 | rl_display_prompt = t; |
| 2016 | local_prompt = expand_prompt (t, &prompt_visible_length, |
| 2017 | &prompt_last_invisible, |
| 2018 | &prompt_invis_chars_first_line); |
| 2019 | local_prompt_prefix = (char *)NULL((void *)0); |
| 2020 | rl_forced_update_display (); |
| 2021 | |
| 2022 | rl_display_prompt = oldp; |
| 2023 | local_prompt = oldl; |
| 2024 | local_prompt_prefix = oldlprefix; |
| 2025 | prompt_visible_length = oldlen; |
| 2026 | prompt_prefix_length = oldplen; |
| 2027 | prompt_last_invisible = oldlast; |
| 2028 | prompt_invis_chars_first_line = oldninvis; |
| 2029 | } |
| 2030 | |
| 2031 | /* Redisplay the current line after a SIGWINCH is received. */ |
| 2032 | void |
| 2033 | _rl_redisplay_after_sigwinch () |
| 2034 | { |
| 2035 | char *t; |
| 2036 | |
| 2037 | /* Clear the current line and put the cursor at column 0. Make sure |
| 2038 | the right thing happens if we have wrapped to a new screen line. */ |
| 2039 | if (_rl_term_cr) |
| 2040 | { |
| 2041 | #if defined (__MSDOS__) |
| 2042 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
| 2043 | #else |
| 2044 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 2045 | #endif |
| 2046 | _rl_last_c_pos = 0; |
| 2047 | #if defined (__MSDOS__) |
| 2048 | space_to_eol (_rl_screenwidth); |
| 2049 | putc ('\r', rl_outstream)(!__isthreaded ? __sputc('\r', rl_outstream) : (putc)('\r', rl_outstream )); |
| 2050 | #else |
| 2051 | if (_rl_term_clreol) |
| 2052 | tputs (_rl_term_clreol, 1, _rl_output_character_function); |
| 2053 | else |
| 2054 | { |
| 2055 | space_to_eol (_rl_screenwidth); |
| 2056 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 2057 | } |
| 2058 | #endif |
| 2059 | if (_rl_last_v_pos > 0) |
| 2060 | _rl_move_vert (0); |
| 2061 | } |
| 2062 | else |
| 2063 | rl_crlf (); |
| 2064 | |
| 2065 | /* Redraw only the last line of a multi-line prompt. */ |
| 2066 | t = strrchr (rl_display_prompt, '\n'); |
| 2067 | if (t) |
| 2068 | redraw_prompt (++t); |
| 2069 | else |
| 2070 | rl_forced_update_display (); |
| 2071 | } |
| 2072 | |
| 2073 | void |
| 2074 | _rl_clean_up_for_exit () |
| 2075 | { |
| 2076 | if (readline_echoing_p) |
| 2077 | { |
| 2078 | _rl_move_vert (_rl_vis_botlin); |
| 2079 | _rl_vis_botlin = 0; |
| 2080 | fflush (rl_outstream); |
| 2081 | rl_restart_output (1, 0); |
| 2082 | } |
| 2083 | } |
| 2084 | |
| 2085 | void |
| 2086 | _rl_erase_entire_line () |
| 2087 | { |
| 2088 | cr (); |
| 2089 | _rl_clear_to_eol (0); |
| 2090 | cr (); |
| 2091 | fflush (rl_outstream); |
| 2092 | } |
| 2093 | |
| 2094 | /* return the `current display line' of the cursor -- the number of lines to |
| 2095 | move up to get to the first screen line of the current readline line. */ |
| 2096 | int |
| 2097 | _rl_current_display_line () |
| 2098 | { |
| 2099 | int ret, nleft; |
| 2100 | |
| 2101 | /* Find out whether or not there might be invisible characters in the |
| 2102 | editing buffer. */ |
| 2103 | if (rl_display_prompt == rl_prompt) |
| 2104 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
| 2105 | else |
| 2106 | nleft = _rl_last_c_pos - _rl_screenwidth; |
| 2107 | |
| 2108 | if (nleft > 0) |
| 2109 | ret = 1 + nleft / _rl_screenwidth; |
| 2110 | else |
| 2111 | ret = 0; |
| 2112 | |
| 2113 | return ret; |
| 2114 | } |
| 2115 | |
| 2116 | #if defined (HANDLE_MULTIBYTE) |
| 2117 | /* Calculate the number of screen columns occupied by STR from START to END. |
| 2118 | In the case of multibyte characters with stateful encoding, we have to |
| 2119 | scan from the beginning of the string to take the state into account. */ |
| 2120 | static int |
| 2121 | _rl_col_width (str, start, end)(((end) <= (start)) ? 0 : (end) - (start)) |
| 2122 | const char *str; |
| 2123 | int start, end; |
| 2124 | { |
| 2125 | wchar_t wc; |
| 2126 | mbstate_t ps = {0}; |
| 2127 | int tmp, point, width, max; |
| 2128 | |
| 2129 | if (end <= start) |
| 2130 | return 0; |
| 2131 | |
| 2132 | point = 0; |
| 2133 | max = end; |
| 2134 | |
| 2135 | while (point < start) |
| 2136 | { |
| 2137 | tmp = mbrlen (str + point, max, &ps); |
| 2138 | if ((size_t)tmp == (size_t)-1 || (size_t)tmp == (size_t)-2) |
| 2139 | { |
| 2140 | /* In this case, the bytes are invalid or too short to compose a |
| 2141 | multibyte character, so we assume that the first byte represents |
| 2142 | a single character. */ |
| 2143 | point++; |
| 2144 | max--; |
| 2145 | |
| 2146 | /* Clear the state of the byte sequence, because in this case the |
| 2147 | effect of mbstate is undefined. */ |
| 2148 | memset (&ps, 0, sizeof (mbstate_t)); |
| 2149 | } |
| 2150 | else if (tmp == 0) |
| 2151 | break; /* Found '\0' */ |
| 2152 | else |
| 2153 | { |
| 2154 | point += tmp; |
| 2155 | max -= tmp; |
| 2156 | } |
| 2157 | } |
| 2158 | |
| 2159 | /* If START is not a byte that starts a character, then POINT will be |
| 2160 | greater than START. In this case, assume that (POINT - START) gives |
| 2161 | a byte count that is the number of columns of difference. */ |
| 2162 | width = point - start; |
| 2163 | |
| 2164 | while (point < end) |
| 2165 | { |
| 2166 | tmp = mbrtowc (&wc, str + point, max, &ps); |
| 2167 | if ((size_t)tmp == (size_t)-1 || (size_t)tmp == (size_t)-2) |
| 2168 | { |
| 2169 | /* In this case, the bytes are invalid or too short to compose a |
| 2170 | multibyte character, so we assume that the first byte represents |
| 2171 | a single character. */ |
| 2172 | point++; |
| 2173 | max--; |
| 2174 | |
| 2175 | /* and assume that the byte occupies a single column. */ |
| 2176 | width++; |
| 2177 | |
| 2178 | /* Clear the state of the byte sequence, because in this case the |
| 2179 | effect of mbstate is undefined. */ |
| 2180 | memset (&ps, 0, sizeof (mbstate_t)); |
| 2181 | } |
| 2182 | else if (tmp == 0) |
| 2183 | break; /* Found '\0' */ |
| 2184 | else |
| 2185 | { |
| 2186 | point += tmp; |
| 2187 | max -= tmp; |
| 2188 | tmp = wcwidth(wc); |
| 2189 | width += (tmp >= 0) ? tmp : 1; |
| 2190 | } |
| 2191 | } |
| 2192 | |
| 2193 | width += point - end; |
| 2194 | |
| 2195 | return width; |
| 2196 | } |
| 2197 | #endif /* HANDLE_MULTIBYTE */ |