| 1 | /* display.c -- readline redisplay facility. */ |
| 2 | |
| 3 | /* Copyright (C) 1987-2005 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_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 | #ifdef __MSDOS__ |
| 45 | # include <pc.h> |
| 46 | #endif |
| 47 | |
| 48 | /* System-specific feature definitions and include files. */ |
| 49 | #include "rldefs.h" |
| 50 | #include "rlmbutil.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 | #include "rlprivate.h" |
| 60 | #include "xmalloc.h" |
| 61 | |
| 62 | #if !defined (strchr) && !defined (__STDC__) |
| 63 | extern char *strchr (), *strrchr (); |
| 64 | #endif /* !strchr && !__STDC__ */ |
| 65 | |
| 66 | #if defined (HACK_TERMCAP_MOTION) |
| 67 | extern char *_rl_term_forward_char; |
| 68 | #endif |
| 69 | |
| 70 | static void update_line PARAMS((char *, char *, int, int, int, int)); |
| 71 | static void space_to_eol PARAMS((int)); |
| 72 | static void delete_chars PARAMS((int)); |
| 73 | static void insert_some_chars PARAMS((char *, int, int)); |
| 74 | static void cr PARAMS((void)); |
| 75 | |
| 76 | #if defined (HANDLE_MULTIBYTE) |
| 77 | static int _rl_col_width PARAMS((const char *, int, int)); |
| 78 | static int *_rl_wrapped_line; |
| 79 | #else |
| 80 | # define _rl_col_width(l, s, e) (((e) <= (s)) ? 0 : (e) - (s)) |
| 81 | #endif |
| 82 | |
| 83 | static int *inv_lbreaks, *vis_lbreaks; |
| 84 | static int inv_lbsize, vis_lbsize; |
| 85 | |
| 86 | /* Heuristic used to decide whether it is faster to move from CUR to NEW |
| 87 | by backing up or outputting a carriage return and moving forward. */ |
| 88 | #define CR_FASTER(new, cur) (((new) + 1) < ((cur) - (new))) |
| 89 | |
| 90 | /* **************************************************************** */ |
| 91 | /* */ |
| 92 | /* Display stuff */ |
| 93 | /* */ |
| 94 | /* **************************************************************** */ |
| 95 | |
| 96 | /* This is the stuff that is hard for me. I never seem to write good |
| 97 | display routines in C. Let's see how I do this time. */ |
| 98 | |
| 99 | /* (PWP) Well... Good for a simple line updater, but totally ignores |
| 100 | the problems of input lines longer than the screen width. |
| 101 | |
| 102 | update_line and the code that calls it makes a multiple line, |
| 103 | automatically wrapping line update. Careful attention needs |
| 104 | to be paid to the vertical position variables. */ |
| 105 | |
| 106 | /* Keep two buffers; one which reflects the current contents of the |
| 107 | screen, and the other to draw what we think the new contents should |
| 108 | be. Then compare the buffers, and make whatever changes to the |
| 109 | screen itself that we should. Finally, make the buffer that we |
| 110 | just drew into be the one which reflects the current contents of the |
| 111 | screen, and place the cursor where it belongs. |
| 112 | |
| 113 | Commands that want to can fix the display themselves, and then let |
| 114 | this function know that the display has been fixed by setting the |
| 115 | RL_DISPLAY_FIXED variable. This is good for efficiency. */ |
| 116 | |
| 117 | /* Application-specific redisplay function. */ |
| 118 | rl_voidfunc_t *rl_redisplay_function = rl_redisplay; |
| 119 | |
| 120 | /* Global variables declared here. */ |
| 121 | /* What YOU turn on when you have handled all redisplay yourself. */ |
| 122 | int rl_display_fixed = 0; |
| 123 | |
| 124 | int _rl_suppress_redisplay = 0; |
| 125 | int _rl_want_redisplay = 0; |
| 126 | |
| 127 | /* The stuff that gets printed out before the actual text of the line. |
| 128 | This is usually pointing to rl_prompt. */ |
| 129 | char *rl_display_prompt = (char *)NULL; |
| 130 | |
| 131 | /* Pseudo-global variables declared here. */ |
| 132 | |
| 133 | /* The visible cursor position. If you print some text, adjust this. */ |
| 134 | /* NOTE: _rl_last_c_pos is used as a buffer index when not in a locale |
| 135 | supporting multibyte characters, and an absolute cursor position when |
| 136 | in such a locale. This is an artifact of the donated multibyte support. |
| 137 | Care must be taken when modifying its value. */ |
| 138 | int _rl_last_c_pos = 0; |
| 139 | int _rl_last_v_pos = 0; |
| 140 | |
| 141 | static int cpos_adjusted; |
| 142 | |
| 143 | /* Number of lines currently on screen minus 1. */ |
| 144 | int _rl_vis_botlin = 0; |
| 145 | |
| 146 | /* Variables used only in this file. */ |
| 147 | /* The last left edge of text that was displayed. This is used when |
| 148 | doing horizontal scrolling. It shifts in thirds of a screenwidth. */ |
| 149 | static int last_lmargin; |
| 150 | |
| 151 | /* The line display buffers. One is the line currently displayed on |
| 152 | the screen. The other is the line about to be displayed. */ |
| 153 | static char *visible_line = (char *)NULL; |
| 154 | static char *invisible_line = (char *)NULL; |
| 155 | |
| 156 | /* A buffer for `modeline' messages. */ |
| 157 | static char msg_buf[128]; |
| 158 | |
| 159 | /* Non-zero forces the redisplay even if we thought it was unnecessary. */ |
| 160 | static int forced_display; |
| 161 | |
| 162 | /* Default and initial buffer size. Can grow. */ |
| 163 | static int line_size = 1024; |
| 164 | |
| 165 | /* Variables to keep track of the expanded prompt string, which may |
| 166 | include invisible characters. */ |
| 167 | |
| 168 | static char *local_prompt, *local_prompt_prefix; |
| 169 | static int prompt_visible_length, prompt_prefix_length; |
| 170 | |
| 171 | /* The number of invisible characters in the line currently being |
| 172 | displayed on the screen. */ |
| 173 | static int visible_wrap_offset; |
| 174 | |
| 175 | /* The number of invisible characters in the prompt string. Static so it |
| 176 | can be shared between rl_redisplay and update_line */ |
| 177 | static int wrap_offset; |
| 178 | |
| 179 | /* The index of the last invisible character in the prompt string. */ |
| 180 | static int prompt_last_invisible; |
| 181 | |
| 182 | /* The length (buffer offset) of the first line of the last (possibly |
| 183 | multi-line) buffer displayed on the screen. */ |
| 184 | static int visible_first_line_len; |
| 185 | |
| 186 | /* Number of invisible characters on the first physical line of the prompt. |
| 187 | Only valid when the number of physical characters in the prompt exceeds |
| 188 | (or is equal to) _rl_screenwidth. */ |
| 189 | static int prompt_invis_chars_first_line; |
| 190 | |
| 191 | static int prompt_last_screen_line; |
| 192 | |
| 193 | static int prompt_physical_chars; |
| 194 | |
| 195 | /* Variables to save and restore prompt and display information. */ |
| 196 | |
| 197 | /* These are getting numerous enough that it's time to create a struct. */ |
| 198 | |
| 199 | static char *saved_local_prompt; |
| 200 | static char *saved_local_prefix; |
| 201 | static int saved_last_invisible; |
| 202 | static int saved_visible_length; |
| 203 | static int saved_prefix_length; |
| 204 | static int saved_invis_chars_first_line; |
| 205 | static int saved_physical_chars; |
| 206 | |
| 207 | /* Expand the prompt string S and return the number of visible |
| 208 | characters in *LP, if LP is not null. This is currently more-or-less |
| 209 | a placeholder for expansion. LIP, if non-null is a place to store the |
| 210 | index of the last invisible character in the returned string. NIFLP, |
| 211 | if non-zero, is a place to store the number of invisible characters in |
| 212 | the first prompt line. The previous are used as byte counts -- indexes |
| 213 | into a character buffer. */ |
| 214 | |
| 215 | /* Current implementation: |
| 216 | \001 (^A) start non-visible characters |
| 217 | \002 (^B) end non-visible characters |
| 218 | all characters except \001 and \002 (following a \001) are copied to |
| 219 | the returned string; all characters except those between \001 and |
| 220 | \002 are assumed to be `visible'. */ |
| 221 | |
| 222 | static char * |
| 223 | expand_prompt (pmt, lp, lip, niflp, vlp) |
| 224 | char *pmt; |
| 225 | int *lp, *lip, *niflp, *vlp; |
| 226 | { |
| 227 | char *r, *ret, *p; |
| 228 | int l, rl, last, ignoring, ninvis, invfl, invflset, ind, pind, physchars; |
| 229 | |
| 230 | /* Short-circuit if we can. */ |
| 231 | if ((MB_CUR_MAX <= 1 || rl_byte_oriented) && strchr (pmt, RL_PROMPT_START_IGNORE) == 0) |
| 232 | { |
| 233 | r = savestring (pmt); |
| 234 | if (lp) |
| 235 | *lp = strlen (r); |
| 236 | if (lip) |
| 237 | *lip = 0; |
| 238 | if (niflp) |
| 239 | *niflp = 0; |
| 240 | if (vlp) |
| 241 | *vlp = lp ? *lp : strlen (r); |
| 242 | return r; |
| 243 | } |
| 244 | |
| 245 | l = strlen (pmt); |
| 246 | r = ret = (char *)xmalloc (l + 1); |
| 247 | |
| 248 | invfl = 0; /* invisible chars in first line of prompt */ |
| 249 | invflset = 0; /* we only want to set invfl once */ |
| 250 | |
| 251 | for (rl = ignoring = last = ninvis = physchars = 0, p = pmt; p && *p; p++) |
| 252 | { |
| 253 | /* This code strips the invisible character string markers |
| 254 | RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE */ |
| 255 | if (*p == RL_PROMPT_START_IGNORE) |
| 256 | { |
| 257 | ignoring++; |
| 258 | continue; |
| 259 | } |
| 260 | else if (ignoring && *p == RL_PROMPT_END_IGNORE) |
| 261 | { |
| 262 | ignoring = 0; |
| 263 | if (p[-1] != RL_PROMPT_START_IGNORE) |
| 264 | last = r - ret - 1; |
| 265 | continue; |
| 266 | } |
| 267 | else |
| 268 | { |
| 269 | #if defined (HANDLE_MULTIBYTE) |
| 270 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 271 | { |
| 272 | pind = p - pmt; |
| 273 | ind = _rl_find_next_mbchar (pmt, pind, 1, MB_FIND_NONZERO); |
| 274 | l = ind - pind; |
| 275 | while (l--) |
| 276 | *r++ = *p++; |
| 277 | if (!ignoring) |
| 278 | { |
| 279 | rl += ind - pind; |
| 280 | physchars += _rl_col_width (pmt, pind, ind); |
| 281 | } |
| 282 | else |
| 283 | ninvis += ind - pind; |
| 284 | p--; /* compensate for later increment */ |
| 285 | } |
| 286 | else |
| 287 | #endif |
| 288 | { |
| 289 | *r++ = *p; |
| 290 | if (!ignoring) |
| 291 | { |
| 292 | rl++; /* visible length byte counter */ |
| 293 | physchars++; |
| 294 | } |
| 295 | else |
| 296 | ninvis++; /* invisible chars byte counter */ |
| 297 | } |
| 298 | |
| 299 | if (invflset == 0 && rl >= _rl_screenwidth) |
| 300 | { |
| 301 | invfl = ninvis; |
| 302 | invflset = 1; |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | if (rl < _rl_screenwidth) |
| 308 | invfl = ninvis; |
| 309 | |
| 310 | *r = '\0'; |
| 311 | if (lp) |
| 312 | *lp = rl; |
| 313 | if (lip) |
| 314 | *lip = last; |
| 315 | if (niflp) |
| 316 | *niflp = invfl; |
| 317 | if (vlp) |
| 318 | *vlp = physchars; |
| 319 | return ret; |
| 320 | } |
| 321 | |
| 322 | /* Just strip out RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE from |
| 323 | PMT and return the rest of PMT. */ |
| 324 | char * |
| 325 | _rl_strip_prompt (pmt) |
| 326 | char *pmt; |
| 327 | { |
| 328 | char *ret; |
| 329 | |
| 330 | ret = expand_prompt (pmt, (int *)NULL, (int *)NULL, (int *)NULL, (int *)NULL); |
| 331 | return ret; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * Expand the prompt string into the various display components, if |
| 336 | * necessary. |
| 337 | * |
| 338 | * local_prompt = expanded last line of string in rl_display_prompt |
| 339 | * (portion after the final newline) |
| 340 | * local_prompt_prefix = portion before last newline of rl_display_prompt, |
| 341 | * expanded via expand_prompt |
| 342 | * prompt_visible_length = number of visible characters in local_prompt |
| 343 | * prompt_prefix_length = number of visible characters in local_prompt_prefix |
| 344 | * |
| 345 | * This function is called once per call to readline(). It may also be |
| 346 | * called arbitrarily to expand the primary prompt. |
| 347 | * |
| 348 | * The return value is the number of visible characters on the last line |
| 349 | * of the (possibly multi-line) prompt. |
| 350 | */ |
| 351 | int |
| 352 | rl_expand_prompt (prompt) |
| 353 | char *prompt; |
| 354 | { |
| 355 | char *p, *t; |
| 356 | int c; |
| 357 | |
| 358 | /* Clear out any saved values. */ |
| 359 | FREE (local_prompt); |
| 360 | FREE (local_prompt_prefix); |
| 361 | |
| 362 | local_prompt = local_prompt_prefix = (char *)0; |
| 363 | prompt_last_invisible = prompt_invis_chars_first_line = 0; |
| 364 | prompt_visible_length = prompt_physical_chars = 0; |
| 365 | |
| 366 | if (prompt == 0 || *prompt == 0) |
| 367 | return (0); |
| 368 | |
| 369 | p = strrchr (prompt, '\n'); |
| 370 | if (!p) |
| 371 | { |
| 372 | /* The prompt is only one logical line, though it might wrap. */ |
| 373 | local_prompt = expand_prompt (prompt, &prompt_visible_length, |
| 374 | &prompt_last_invisible, |
| 375 | &prompt_invis_chars_first_line, |
| 376 | &prompt_physical_chars); |
| 377 | local_prompt_prefix = (char *)0; |
| 378 | return (prompt_visible_length); |
| 379 | } |
| 380 | else |
| 381 | { |
| 382 | /* The prompt spans multiple lines. */ |
| 383 | t = ++p; |
| 384 | local_prompt = expand_prompt (p, &prompt_visible_length, |
| 385 | &prompt_last_invisible, |
| 386 | (int *)NULL, |
| 387 | &prompt_physical_chars); |
| 388 | c = *t; *t = '\0'; |
| 389 | /* The portion of the prompt string up to and including the |
| 390 | final newline is now null-terminated. */ |
| 391 | local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length, |
| 392 | (int *)NULL, |
| 393 | &prompt_invis_chars_first_line, |
| 394 | (int *)NULL); |
| 395 | *t = c; |
| 396 | return (prompt_prefix_length); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | /* Initialize the VISIBLE_LINE and INVISIBLE_LINE arrays, and their associated |
| 401 | arrays of line break markers. MINSIZE is the minimum size of VISIBLE_LINE |
| 402 | and INVISIBLE_LINE; if it is greater than LINE_SIZE, LINE_SIZE is |
| 403 | increased. If the lines have already been allocated, this ensures that |
| 404 | they can hold at least MINSIZE characters. */ |
| 405 | static void |
| 406 | init_line_structures (minsize) |
| 407 | int minsize; |
| 408 | { |
| 409 | register int n; |
| 410 | |
| 411 | if (invisible_line == 0) /* initialize it */ |
| 412 | { |
| 413 | if (line_size < minsize) |
| 414 | line_size = minsize; |
| 415 | visible_line = (char *)xmalloc (line_size); |
| 416 | invisible_line = (char *)xmalloc (line_size); |
| 417 | } |
| 418 | else if (line_size < minsize) /* ensure it can hold MINSIZE chars */ |
| 419 | { |
| 420 | line_size *= 2; |
| 421 | if (line_size < minsize) |
| 422 | line_size = minsize; |
| 423 | visible_line = (char *)xrealloc (visible_line, line_size); |
| 424 | invisible_line = (char *)xrealloc (invisible_line, line_size); |
| 425 | } |
| 426 | |
| 427 | for (n = minsize; n < line_size; n++) |
| 428 | { |
| 429 | visible_line[n] = 0; |
| 430 | invisible_line[n] = 1; |
| 431 | } |
| 432 | |
| 433 | if (vis_lbreaks == 0) |
| 434 | { |
| 435 | /* should be enough. */ |
| 436 | inv_lbsize = vis_lbsize = 256; |
| 437 | inv_lbreaks = (int *)xmalloc (inv_lbsize * sizeof (int)); |
| 438 | vis_lbreaks = (int *)xmalloc (vis_lbsize * sizeof (int)); |
| 439 | #if defined (HANDLE_MULTIBYTE) |
| 440 | _rl_wrapped_line = (int *)xmalloc (vis_lbsize * sizeof (int)); |
| 441 | #endif |
| 442 | inv_lbreaks[0] = vis_lbreaks[0] = 0; |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /* Basic redisplay algorithm. */ |
| 447 | void |
| 448 | rl_redisplay () |
| 449 | { |
| 450 | register int in, out, c, linenum, cursor_linenum; |
| 451 | register char *line; |
| 452 | int c_pos, inv_botlin, lb_botlin, lb_linenum, o_cpos; |
| 453 | int newlines, lpos, temp, modmark, n0, num; |
| 454 | char *prompt_this_line; |
| 455 | #if defined (HANDLE_MULTIBYTE) |
| 456 | wchar_t wc; |
| 457 | size_t wc_bytes; |
| 458 | int wc_width; |
| 459 | mbstate_t ps; |
| 460 | int _rl_wrapped_multicolumn = 0; |
| 461 | #endif |
| 462 | |
| 463 | if (!readline_echoing_p) |
| 464 | return; |
| 465 | |
| 466 | /* Signals are blocked through this function as the global data structures |
| 467 | could get corrupted upon modifications from an invoked signal handler. */ |
| 468 | _rl_block_sigint (); |
| 469 | |
| 470 | if (!rl_display_prompt) |
| 471 | rl_display_prompt = ""; |
| 472 | |
| 473 | if (invisible_line == 0 || vis_lbreaks == 0) |
| 474 | { |
| 475 | init_line_structures (0); |
| 476 | rl_on_new_line (); |
| 477 | } |
| 478 | |
| 479 | /* Draw the line into the buffer. */ |
| 480 | c_pos = -1; |
| 481 | |
| 482 | line = invisible_line; |
| 483 | out = inv_botlin = 0; |
| 484 | |
| 485 | /* Mark the line as modified or not. We only do this for history |
| 486 | lines. */ |
| 487 | modmark = 0; |
| 488 | if (_rl_mark_modified_lines && current_history () && rl_undo_list) |
| 489 | { |
| 490 | line[out++] = '*'; |
| 491 | line[out] = '\0'; |
| 492 | modmark = 1; |
| 493 | } |
| 494 | |
| 495 | /* If someone thought that the redisplay was handled, but the currently |
| 496 | visible line has a different modification state than the one about |
| 497 | to become visible, then correct the caller's misconception. */ |
| 498 | if (visible_line[0] != invisible_line[0]) |
| 499 | rl_display_fixed = 0; |
| 500 | |
| 501 | /* If the prompt to be displayed is the `primary' readline prompt (the |
| 502 | one passed to readline()), use the values we have already expanded. |
| 503 | If not, use what's already in rl_display_prompt. WRAP_OFFSET is the |
| 504 | number of non-visible characters in the prompt string. */ |
| 505 | if (rl_display_prompt == rl_prompt || local_prompt) |
| 506 | { |
| 507 | int local_len = local_prompt ? strlen (local_prompt) : 0; |
| 508 | if (local_prompt_prefix && forced_display) |
| 509 | _rl_output_some_chars (local_prompt_prefix, strlen (local_prompt_prefix)); |
| 510 | |
| 511 | if (local_len > 0) |
| 512 | { |
| 513 | temp = local_len + out + 2; |
| 514 | if (temp >= line_size) |
| 515 | { |
| 516 | line_size = (temp + 1024) - (temp % 1024); |
| 517 | visible_line = (char *)xrealloc (visible_line, line_size); |
| 518 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); |
| 519 | } |
| 520 | strncpy (line + out, local_prompt, local_len); |
| 521 | out += local_len; |
| 522 | } |
| 523 | line[out] = '\0'; |
| 524 | wrap_offset = local_len - prompt_visible_length; |
| 525 | } |
| 526 | else |
| 527 | { |
| 528 | int pmtlen; |
| 529 | prompt_this_line = strrchr (rl_display_prompt, '\n'); |
| 530 | if (!prompt_this_line) |
| 531 | prompt_this_line = rl_display_prompt; |
| 532 | else |
| 533 | { |
| 534 | prompt_this_line++; |
| 535 | pmtlen = prompt_this_line - rl_display_prompt; /* temp var */ |
| 536 | if (forced_display) |
| 537 | { |
| 538 | _rl_output_some_chars (rl_display_prompt, pmtlen); |
| 539 | /* Make sure we are at column zero even after a newline, |
| 540 | regardless of the state of terminal output processing. */ |
| 541 | if (pmtlen < 2 || prompt_this_line[-2] != '\r') |
| 542 | cr (); |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | prompt_physical_chars = pmtlen = strlen (prompt_this_line); |
| 547 | temp = pmtlen + out + 2; |
| 548 | if (temp >= line_size) |
| 549 | { |
| 550 | line_size = (temp + 1024) - (temp % 1024); |
| 551 | visible_line = (char *)xrealloc (visible_line, line_size); |
| 552 | line = invisible_line = (char *)xrealloc (invisible_line, line_size); |
| 553 | } |
| 554 | strncpy (line + out, prompt_this_line, pmtlen); |
| 555 | out += pmtlen; |
| 556 | line[out] = '\0'; |
| 557 | wrap_offset = prompt_invis_chars_first_line = 0; |
| 558 | } |
| 559 | |
| 560 | #define CHECK_INV_LBREAKS() \ |
| 561 | do { \ |
| 562 | if (newlines >= (inv_lbsize - 2)) \ |
| 563 | { \ |
| 564 | inv_lbsize *= 2; \ |
| 565 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
| 566 | } \ |
| 567 | } while (0) |
| 568 | |
| 569 | #if defined (HANDLE_MULTIBYTE) |
| 570 | #define CHECK_LPOS() \ |
| 571 | do { \ |
| 572 | lpos++; \ |
| 573 | if (lpos >= _rl_screenwidth) \ |
| 574 | { \ |
| 575 | if (newlines >= (inv_lbsize - 2)) \ |
| 576 | { \ |
| 577 | inv_lbsize *= 2; \ |
| 578 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
| 579 | _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \ |
| 580 | } \ |
| 581 | inv_lbreaks[++newlines] = out; \ |
| 582 | _rl_wrapped_line[newlines] = _rl_wrapped_multicolumn; \ |
| 583 | lpos = 0; \ |
| 584 | } \ |
| 585 | } while (0) |
| 586 | #else |
| 587 | #define CHECK_LPOS() \ |
| 588 | do { \ |
| 589 | lpos++; \ |
| 590 | if (lpos >= _rl_screenwidth) \ |
| 591 | { \ |
| 592 | if (newlines >= (inv_lbsize - 2)) \ |
| 593 | { \ |
| 594 | inv_lbsize *= 2; \ |
| 595 | inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \ |
| 596 | } \ |
| 597 | inv_lbreaks[++newlines] = out; \ |
| 598 | lpos = 0; \ |
| 599 | } \ |
| 600 | } while (0) |
| 601 | #endif |
| 602 | |
| 603 | /* inv_lbreaks[i] is where line i starts in the buffer. */ |
| 604 | inv_lbreaks[newlines = 0] = 0; |
| 605 | #if 0 |
| 606 | lpos = out - wrap_offset; |
| 607 | #else |
| 608 | lpos = prompt_physical_chars + modmark; |
| 609 | #endif |
| 610 | |
| 611 | #if defined (HANDLE_MULTIBYTE) |
| 612 | memset (_rl_wrapped_line, 0, vis_lbsize); |
| 613 | num = 0; |
| 614 | #endif |
| 615 | |
| 616 | /* prompt_invis_chars_first_line is the number of invisible characters in |
| 617 | the first physical line of the prompt. |
| 618 | wrap_offset - prompt_invis_chars_first_line is the number of invis |
| 619 | chars on the second line. */ |
| 620 | |
| 621 | /* what if lpos is already >= _rl_screenwidth before we start drawing the |
| 622 | contents of the command line? */ |
| 623 | while (lpos >= _rl_screenwidth) |
| 624 | { |
| 625 | /* fix from Darin Johnson <darin@acuson.com> for prompt string with |
| 626 | invisible characters that is longer than the screen width. The |
| 627 | prompt_invis_chars_first_line variable could be made into an array |
| 628 | saying how many invisible characters there are per line, but that's |
| 629 | probably too much work for the benefit gained. How many people have |
| 630 | prompts that exceed two physical lines? |
| 631 | Additional logic fix from Edward Catmur <ed@catmur.co.uk> */ |
| 632 | #if defined (HANDLE_MULTIBYTE) |
| 633 | n0 = num; |
| 634 | temp = local_prompt ? strlen (local_prompt) : 0; |
| 635 | while (num < temp) |
| 636 | { |
| 637 | if (_rl_col_width (local_prompt, n0, num) > _rl_screenwidth) |
| 638 | { |
| 639 | num = _rl_find_prev_mbchar (local_prompt, num, MB_FIND_ANY); |
| 640 | break; |
| 641 | } |
| 642 | num++; |
| 643 | } |
| 644 | temp = num + |
| 645 | #else |
| 646 | temp = ((newlines + 1) * _rl_screenwidth) + |
| 647 | #endif /* !HANDLE_MULTIBYTE */ |
| 648 | ((local_prompt_prefix == 0) ? ((newlines == 0) ? prompt_invis_chars_first_line |
| 649 | : ((newlines == 1) ? wrap_offset : 0)) |
| 650 | : ((newlines == 0) ? wrap_offset :0)); |
| 651 | |
| 652 | inv_lbreaks[++newlines] = temp; |
| 653 | #if defined (HANDLE_MULTIBYTE) |
| 654 | lpos -= _rl_col_width (local_prompt, n0, num); |
| 655 | #else |
| 656 | lpos -= _rl_screenwidth; |
| 657 | #endif |
| 658 | } |
| 659 | |
| 660 | prompt_last_screen_line = newlines; |
| 661 | |
| 662 | /* Draw the rest of the line (after the prompt) into invisible_line, keeping |
| 663 | track of where the cursor is (c_pos), the number of the line containing |
| 664 | the cursor (lb_linenum), the last line number (lb_botlin and inv_botlin). |
| 665 | It maintains an array of line breaks for display (inv_lbreaks). |
| 666 | This handles expanding tabs for display and displaying meta characters. */ |
| 667 | lb_linenum = 0; |
| 668 | #if defined (HANDLE_MULTIBYTE) |
| 669 | in = 0; |
| 670 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 671 | { |
| 672 | memset (&ps, 0, sizeof (mbstate_t)); |
| 673 | wc_bytes = mbrtowc (&wc, rl_line_buffer, rl_end, &ps); |
| 674 | } |
| 675 | else |
| 676 | wc_bytes = 1; |
| 677 | while (in < rl_end) |
| 678 | #else |
| 679 | for (in = 0; in < rl_end; in++) |
| 680 | #endif |
| 681 | { |
| 682 | c = (unsigned char)rl_line_buffer[in]; |
| 683 | |
| 684 | #if defined (HANDLE_MULTIBYTE) |
| 685 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 686 | { |
| 687 | if (MB_INVALIDCH (wc_bytes)) |
| 688 | { |
| 689 | /* Byte sequence is invalid or shortened. Assume that the |
| 690 | first byte represents a character. */ |
| 691 | wc_bytes = 1; |
| 692 | /* Assume that a character occupies a single column. */ |
| 693 | wc_width = 1; |
| 694 | memset (&ps, 0, sizeof (mbstate_t)); |
| 695 | } |
| 696 | else if (MB_NULLWCH (wc_bytes)) |
| 697 | break; /* Found '\0' */ |
| 698 | else |
| 699 | { |
| 700 | temp = wcwidth (wc); |
| 701 | wc_width = (temp >= 0) ? temp : 1; |
| 702 | } |
| 703 | } |
| 704 | #endif |
| 705 | |
| 706 | if (out + 8 >= line_size) /* XXX - 8 for \t */ |
| 707 | { |
| 708 | line_size *= 2; |
| 709 | visible_line = (char *)xrealloc (visible_line, line_size); |
| 710 | invisible_line = (char *)xrealloc (invisible_line, line_size); |
| 711 | line = invisible_line; |
| 712 | } |
| 713 | |
| 714 | if (in == rl_point) |
| 715 | { |
| 716 | c_pos = out; |
| 717 | lb_linenum = newlines; |
| 718 | } |
| 719 | |
| 720 | #if defined (HANDLE_MULTIBYTE) |
| 721 | if (META_CHAR (c) && _rl_output_meta_chars == 0) /* XXX - clean up */ |
| 722 | #else |
| 723 | if (META_CHAR (c)) |
| 724 | #endif |
| 725 | { |
| 726 | if (_rl_output_meta_chars == 0) |
| 727 | { |
| 728 | sprintf (line + out, "\\%o", c); |
| 729 | |
| 730 | if (lpos + 4 >= _rl_screenwidth) |
| 731 | { |
| 732 | temp = _rl_screenwidth - lpos; |
| 733 | CHECK_INV_LBREAKS (); |
| 734 | inv_lbreaks[++newlines] = out + temp; |
| 735 | lpos = 4 - temp; |
| 736 | } |
| 737 | else |
| 738 | lpos += 4; |
| 739 | |
| 740 | out += 4; |
| 741 | } |
| 742 | else |
| 743 | { |
| 744 | line[out++] = c; |
| 745 | CHECK_LPOS(); |
| 746 | } |
| 747 | } |
| 748 | #if defined (DISPLAY_TABS) |
| 749 | else if (c == '\t') |
| 750 | { |
| 751 | register int newout; |
| 752 | |
| 753 | #if 0 |
| 754 | newout = (out | (int)7) + 1; |
| 755 | #else |
| 756 | newout = out + 8 - lpos % 8; |
| 757 | #endif |
| 758 | temp = newout - out; |
| 759 | if (lpos + temp >= _rl_screenwidth) |
| 760 | { |
| 761 | register int temp2; |
| 762 | temp2 = _rl_screenwidth - lpos; |
| 763 | CHECK_INV_LBREAKS (); |
| 764 | inv_lbreaks[++newlines] = out + temp2; |
| 765 | lpos = temp - temp2; |
| 766 | while (out < newout) |
| 767 | line[out++] = ' '; |
| 768 | } |
| 769 | else |
| 770 | { |
| 771 | while (out < newout) |
| 772 | line[out++] = ' '; |
| 773 | lpos += temp; |
| 774 | } |
| 775 | } |
| 776 | #endif |
| 777 | else if (c == '\n' && _rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
| 778 | { |
| 779 | line[out++] = '\0'; /* XXX - sentinel */ |
| 780 | CHECK_INV_LBREAKS (); |
| 781 | inv_lbreaks[++newlines] = out; |
| 782 | lpos = 0; |
| 783 | } |
| 784 | else if (CTRL_CHAR (c) || c == RUBOUT) |
| 785 | { |
| 786 | line[out++] = '^'; |
| 787 | CHECK_LPOS(); |
| 788 | line[out++] = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
| 789 | CHECK_LPOS(); |
| 790 | } |
| 791 | else |
| 792 | { |
| 793 | #if defined (HANDLE_MULTIBYTE) |
| 794 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 795 | { |
| 796 | register int i; |
| 797 | |
| 798 | _rl_wrapped_multicolumn = 0; |
| 799 | |
| 800 | if (_rl_screenwidth < lpos + wc_width) |
| 801 | for (i = lpos; i < _rl_screenwidth; i++) |
| 802 | { |
| 803 | /* The space will be removed in update_line() */ |
| 804 | line[out++] = ' '; |
| 805 | _rl_wrapped_multicolumn++; |
| 806 | CHECK_LPOS(); |
| 807 | } |
| 808 | if (in == rl_point) |
| 809 | { |
| 810 | c_pos = out; |
| 811 | lb_linenum = newlines; |
| 812 | } |
| 813 | for (i = in; i < in+wc_bytes; i++) |
| 814 | line[out++] = rl_line_buffer[i]; |
| 815 | for (i = 0; i < wc_width; i++) |
| 816 | CHECK_LPOS(); |
| 817 | } |
| 818 | else |
| 819 | { |
| 820 | line[out++] = c; |
| 821 | CHECK_LPOS(); |
| 822 | } |
| 823 | #else |
| 824 | line[out++] = c; |
| 825 | CHECK_LPOS(); |
| 826 | #endif |
| 827 | } |
| 828 | |
| 829 | #if defined (HANDLE_MULTIBYTE) |
| 830 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 831 | { |
| 832 | in += wc_bytes; |
| 833 | wc_bytes = mbrtowc (&wc, rl_line_buffer + in, rl_end - in, &ps); |
| 834 | } |
| 835 | else |
| 836 | in++; |
| 837 | #endif |
| 838 | |
| 839 | } |
| 840 | line[out] = '\0'; |
| 841 | if (c_pos < 0) |
| 842 | { |
| 843 | c_pos = out; |
| 844 | lb_linenum = newlines; |
| 845 | } |
| 846 | |
| 847 | inv_botlin = lb_botlin = newlines; |
| 848 | CHECK_INV_LBREAKS (); |
| 849 | inv_lbreaks[newlines+1] = out; |
| 850 | cursor_linenum = lb_linenum; |
| 851 | |
| 852 | /* C_POS == position in buffer where cursor should be placed. |
| 853 | CURSOR_LINENUM == line number where the cursor should be placed. */ |
| 854 | |
| 855 | /* PWP: now is when things get a bit hairy. The visible and invisible |
| 856 | line buffers are really multiple lines, which would wrap every |
| 857 | (screenwidth - 1) characters. Go through each in turn, finding |
| 858 | the changed region and updating it. The line order is top to bottom. */ |
| 859 | |
| 860 | /* If we can move the cursor up and down, then use multiple lines, |
| 861 | otherwise, let long lines display in a single terminal line, and |
| 862 | horizontally scroll it. */ |
| 863 | |
| 864 | if (_rl_horizontal_scroll_mode == 0 && _rl_term_up && *_rl_term_up) |
| 865 | { |
| 866 | int nleft, pos, changed_screen_line, tx; |
| 867 | |
| 868 | if (!rl_display_fixed || forced_display) |
| 869 | { |
| 870 | forced_display = 0; |
| 871 | |
| 872 | /* If we have more than a screenful of material to display, then |
| 873 | only display a screenful. We should display the last screen, |
| 874 | not the first. */ |
| 875 | if (out >= _rl_screenchars) |
| 876 | { |
| 877 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 878 | out = _rl_find_prev_mbchar (line, _rl_screenchars, MB_FIND_ANY); |
| 879 | else |
| 880 | out = _rl_screenchars - 1; |
| 881 | } |
| 882 | |
| 883 | /* The first line is at character position 0 in the buffer. The |
| 884 | second and subsequent lines start at inv_lbreaks[N], offset by |
| 885 | OFFSET (which has already been calculated above). */ |
| 886 | |
| 887 | #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0) |
| 888 | #define VIS_LLEN(l) ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l])) |
| 889 | #define INV_LLEN(l) (inv_lbreaks[l+1] - inv_lbreaks[l]) |
| 890 | #define VIS_CHARS(line) (visible_line + vis_lbreaks[line]) |
| 891 | #define VIS_LINE(line) ((line) > _rl_vis_botlin) ? "" : VIS_CHARS(line) |
| 892 | #define INV_LINE(line) (invisible_line + inv_lbreaks[line]) |
| 893 | |
| 894 | /* For each line in the buffer, do the updating display. */ |
| 895 | for (linenum = 0; linenum <= inv_botlin; linenum++) |
| 896 | { |
| 897 | o_cpos = _rl_last_c_pos; |
| 898 | cpos_adjusted = 0; |
| 899 | update_line (VIS_LINE(linenum), INV_LINE(linenum), linenum, |
| 900 | VIS_LLEN(linenum), INV_LLEN(linenum), inv_botlin); |
| 901 | |
| 902 | /* update_line potentially changes _rl_last_c_pos, but doesn't |
| 903 | take invisible characters into account, since _rl_last_c_pos |
| 904 | is an absolute cursor position in a multibyte locale. See |
| 905 | if compensating here is the right thing, or if we have to |
| 906 | change update_line itself. There is one case in which |
| 907 | update_line adjusts _rl_last_c_pos itself (so it can pass |
| 908 | _rl_move_cursor_relative accurate values); it communicates |
| 909 | this back by setting cpos_adjusted */ |
| 910 | if (linenum == 0 && (MB_CUR_MAX > 1 && rl_byte_oriented == 0) && |
| 911 | cpos_adjusted == 0 && |
| 912 | _rl_last_c_pos != o_cpos && |
| 913 | _rl_last_c_pos > wrap_offset && |
| 914 | o_cpos < prompt_last_invisible) |
| 915 | _rl_last_c_pos -= wrap_offset; |
| 916 | |
| 917 | /* If this is the line with the prompt, we might need to |
| 918 | compensate for invisible characters in the new line. Do |
| 919 | this only if there is not more than one new line (which |
| 920 | implies that we completely overwrite the old visible line) |
| 921 | and the new line is shorter than the old. Make sure we are |
| 922 | at the end of the new line before clearing. */ |
| 923 | if (linenum == 0 && |
| 924 | inv_botlin == 0 && _rl_last_c_pos == out && |
| 925 | (wrap_offset > visible_wrap_offset) && |
| 926 | (_rl_last_c_pos < visible_first_line_len)) |
| 927 | { |
| 928 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 929 | nleft = _rl_screenwidth - _rl_last_c_pos; |
| 930 | else |
| 931 | nleft = _rl_screenwidth + wrap_offset - _rl_last_c_pos; |
| 932 | if (nleft) |
| 933 | _rl_clear_to_eol (nleft); |
| 934 | } |
| 935 | |
| 936 | /* Since the new first line is now visible, save its length. */ |
| 937 | if (linenum == 0) |
| 938 | visible_first_line_len = (inv_botlin > 0) ? inv_lbreaks[1] : out - wrap_offset; |
| 939 | } |
| 940 | |
| 941 | /* We may have deleted some lines. If so, clear the left over |
| 942 | blank ones at the bottom out. */ |
| 943 | if (_rl_vis_botlin > inv_botlin) |
| 944 | { |
| 945 | char *tt; |
| 946 | for (; linenum <= _rl_vis_botlin; linenum++) |
| 947 | { |
| 948 | tt = VIS_CHARS (linenum); |
| 949 | _rl_move_vert (linenum); |
| 950 | _rl_move_cursor_relative (0, tt); |
| 951 | _rl_clear_to_eol |
| 952 | ((linenum == _rl_vis_botlin) ? strlen (tt) : _rl_screenwidth); |
| 953 | } |
| 954 | } |
| 955 | _rl_vis_botlin = inv_botlin; |
| 956 | |
| 957 | /* CHANGED_SCREEN_LINE is set to 1 if we have moved to a |
| 958 | different screen line during this redisplay. */ |
| 959 | changed_screen_line = _rl_last_v_pos != cursor_linenum; |
| 960 | if (changed_screen_line) |
| 961 | { |
| 962 | _rl_move_vert (cursor_linenum); |
| 963 | /* If we moved up to the line with the prompt using _rl_term_up, |
| 964 | the physical cursor position on the screen stays the same, |
| 965 | but the buffer position needs to be adjusted to account |
| 966 | for invisible characters. */ |
| 967 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && cursor_linenum == 0 && wrap_offset) |
| 968 | _rl_last_c_pos += wrap_offset; |
| 969 | } |
| 970 | |
| 971 | /* We have to reprint the prompt if it contains invisible |
| 972 | characters, since it's not generally OK to just reprint |
| 973 | the characters from the current cursor position. But we |
| 974 | only need to reprint it if the cursor is before the last |
| 975 | invisible character in the prompt string. */ |
| 976 | nleft = prompt_visible_length + wrap_offset; |
| 977 | if (cursor_linenum == 0 && wrap_offset > 0 && _rl_last_c_pos > 0 && |
| 978 | _rl_last_c_pos <= prompt_last_invisible && local_prompt) |
| 979 | { |
| 980 | #if defined (__MSDOS__) |
| 981 | putc ('\r', rl_outstream); |
| 982 | #else |
| 983 | if (_rl_term_cr) |
| 984 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 985 | #endif |
| 986 | _rl_output_some_chars (local_prompt, nleft); |
| 987 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 988 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, nleft) - wrap_offset; |
| 989 | else |
| 990 | _rl_last_c_pos = nleft; |
| 991 | } |
| 992 | |
| 993 | /* Where on that line? And where does that line start |
| 994 | in the buffer? */ |
| 995 | pos = inv_lbreaks[cursor_linenum]; |
| 996 | /* nleft == number of characters in the line buffer between the |
| 997 | start of the line and the cursor position. */ |
| 998 | nleft = c_pos - pos; |
| 999 | |
| 1000 | /* NLEFT is now a number of characters in a buffer. When in a |
| 1001 | multibyte locale, however, _rl_last_c_pos is an absolute cursor |
| 1002 | position that doesn't take invisible characters in the prompt |
| 1003 | into account. We use a fudge factor to compensate. */ |
| 1004 | |
| 1005 | /* Since _rl_backspace() doesn't know about invisible characters in the |
| 1006 | prompt, and there's no good way to tell it, we compensate for |
| 1007 | those characters here and call _rl_backspace() directly. */ |
| 1008 | if (wrap_offset && cursor_linenum == 0 && nleft < _rl_last_c_pos) |
| 1009 | { |
| 1010 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1011 | tx = _rl_col_width (&visible_line[pos], 0, nleft) - visible_wrap_offset; |
| 1012 | else |
| 1013 | tx = nleft; |
| 1014 | if (_rl_last_c_pos > tx) |
| 1015 | { |
| 1016 | _rl_backspace (_rl_last_c_pos - tx); /* XXX */ |
| 1017 | _rl_last_c_pos = tx; |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | /* We need to note that in a multibyte locale we are dealing with |
| 1022 | _rl_last_c_pos as an absolute cursor position, but moving to a |
| 1023 | point specified by a buffer position (NLEFT) that doesn't take |
| 1024 | invisible characters into account. */ |
| 1025 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1026 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
| 1027 | else if (nleft != _rl_last_c_pos) |
| 1028 | _rl_move_cursor_relative (nleft, &invisible_line[pos]); |
| 1029 | } |
| 1030 | } |
| 1031 | else /* Do horizontal scrolling. */ |
| 1032 | { |
| 1033 | #define M_OFFSET(margin, offset) ((margin) == 0 ? offset : 0) |
| 1034 | int lmargin, ndisp, nleft, phys_c_pos, t; |
| 1035 | |
| 1036 | /* Always at top line. */ |
| 1037 | _rl_last_v_pos = 0; |
| 1038 | |
| 1039 | /* Compute where in the buffer the displayed line should start. This |
| 1040 | will be LMARGIN. */ |
| 1041 | |
| 1042 | /* The number of characters that will be displayed before the cursor. */ |
| 1043 | ndisp = c_pos - wrap_offset; |
| 1044 | nleft = prompt_visible_length + wrap_offset; |
| 1045 | /* Where the new cursor position will be on the screen. This can be |
| 1046 | longer than SCREENWIDTH; if it is, lmargin will be adjusted. */ |
| 1047 | phys_c_pos = c_pos - (last_lmargin ? last_lmargin : wrap_offset); |
| 1048 | t = _rl_screenwidth / 3; |
| 1049 | |
| 1050 | /* If the number of characters had already exceeded the screenwidth, |
| 1051 | last_lmargin will be > 0. */ |
| 1052 | |
| 1053 | /* If the number of characters to be displayed is more than the screen |
| 1054 | width, compute the starting offset so that the cursor is about |
| 1055 | two-thirds of the way across the screen. */ |
| 1056 | if (phys_c_pos > _rl_screenwidth - 2) |
| 1057 | { |
| 1058 | lmargin = c_pos - (2 * t); |
| 1059 | if (lmargin < 0) |
| 1060 | lmargin = 0; |
| 1061 | /* If the left margin would be in the middle of a prompt with |
| 1062 | invisible characters, don't display the prompt at all. */ |
| 1063 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
| 1064 | lmargin = nleft; |
| 1065 | } |
| 1066 | else if (ndisp < _rl_screenwidth - 2) /* XXX - was -1 */ |
| 1067 | lmargin = 0; |
| 1068 | else if (phys_c_pos < 1) |
| 1069 | { |
| 1070 | /* If we are moving back towards the beginning of the line and |
| 1071 | the last margin is no longer correct, compute a new one. */ |
| 1072 | lmargin = ((c_pos - 1) / t) * t; /* XXX */ |
| 1073 | if (wrap_offset && lmargin > 0 && lmargin < nleft) |
| 1074 | lmargin = nleft; |
| 1075 | } |
| 1076 | else |
| 1077 | lmargin = last_lmargin; |
| 1078 | |
| 1079 | /* If the first character on the screen isn't the first character |
| 1080 | in the display line, indicate this with a special character. */ |
| 1081 | if (lmargin > 0) |
| 1082 | line[lmargin] = '<'; |
| 1083 | |
| 1084 | /* If SCREENWIDTH characters starting at LMARGIN do not encompass |
| 1085 | the whole line, indicate that with a special character at the |
| 1086 | right edge of the screen. If LMARGIN is 0, we need to take the |
| 1087 | wrap offset into account. */ |
| 1088 | t = lmargin + M_OFFSET (lmargin, wrap_offset) + _rl_screenwidth; |
| 1089 | if (t < out) |
| 1090 | line[t - 1] = '>'; |
| 1091 | |
| 1092 | if (!rl_display_fixed || forced_display || lmargin != last_lmargin) |
| 1093 | { |
| 1094 | forced_display = 0; |
| 1095 | update_line (&visible_line[last_lmargin], |
| 1096 | &invisible_line[lmargin], |
| 1097 | 0, |
| 1098 | _rl_screenwidth + visible_wrap_offset, |
| 1099 | _rl_screenwidth + (lmargin ? 0 : wrap_offset), |
| 1100 | 0); |
| 1101 | |
| 1102 | /* If the visible new line is shorter than the old, but the number |
| 1103 | of invisible characters is greater, and we are at the end of |
| 1104 | the new line, we need to clear to eol. */ |
| 1105 | t = _rl_last_c_pos - M_OFFSET (lmargin, wrap_offset); |
| 1106 | if ((M_OFFSET (lmargin, wrap_offset) > visible_wrap_offset) && |
| 1107 | (_rl_last_c_pos == out) && |
| 1108 | t < visible_first_line_len) |
| 1109 | { |
| 1110 | nleft = _rl_screenwidth - t; |
| 1111 | _rl_clear_to_eol (nleft); |
| 1112 | } |
| 1113 | visible_first_line_len = out - lmargin - M_OFFSET (lmargin, wrap_offset); |
| 1114 | if (visible_first_line_len > _rl_screenwidth) |
| 1115 | visible_first_line_len = _rl_screenwidth; |
| 1116 | |
| 1117 | _rl_move_cursor_relative (c_pos - lmargin, &invisible_line[lmargin]); |
| 1118 | last_lmargin = lmargin; |
| 1119 | } |
| 1120 | } |
| 1121 | fflush (rl_outstream); |
| 1122 | |
| 1123 | /* Swap visible and non-visible lines. */ |
| 1124 | { |
| 1125 | char *vtemp = visible_line; |
| 1126 | int *itemp = vis_lbreaks, ntemp = vis_lbsize; |
| 1127 | |
| 1128 | visible_line = invisible_line; |
| 1129 | invisible_line = vtemp; |
| 1130 | |
| 1131 | vis_lbreaks = inv_lbreaks; |
| 1132 | inv_lbreaks = itemp; |
| 1133 | |
| 1134 | vis_lbsize = inv_lbsize; |
| 1135 | inv_lbsize = ntemp; |
| 1136 | |
| 1137 | rl_display_fixed = 0; |
| 1138 | /* If we are displaying on a single line, and last_lmargin is > 0, we |
| 1139 | are not displaying any invisible characters, so set visible_wrap_offset |
| 1140 | to 0. */ |
| 1141 | if (_rl_horizontal_scroll_mode && last_lmargin) |
| 1142 | visible_wrap_offset = 0; |
| 1143 | else |
| 1144 | visible_wrap_offset = wrap_offset; |
| 1145 | } |
| 1146 | |
| 1147 | _rl_release_sigint (); |
| 1148 | } |
| 1149 | |
| 1150 | /* PWP: update_line() is based on finding the middle difference of each |
| 1151 | line on the screen; vis: |
| 1152 | |
| 1153 | /old first difference |
| 1154 | /beginning of line | /old last same /old EOL |
| 1155 | v v v v |
| 1156 | old: eddie> Oh, my little gruntle-buggy is to me, as lurgid as |
| 1157 | new: eddie> Oh, my little buggy says to me, as lurgid as |
| 1158 | ^ ^ ^ ^ |
| 1159 | \beginning of line | \new last same \new end of line |
| 1160 | \new first difference |
| 1161 | |
| 1162 | All are character pointers for the sake of speed. Special cases for |
| 1163 | no differences, as well as for end of line additions must be handled. |
| 1164 | |
| 1165 | Could be made even smarter, but this works well enough */ |
| 1166 | static void |
| 1167 | update_line (old, new, current_line, omax, nmax, inv_botlin) |
| 1168 | register char *old, *new; |
| 1169 | int current_line, omax, nmax, inv_botlin; |
| 1170 | { |
| 1171 | register char *ofd, *ols, *oe, *nfd, *nls, *ne; |
| 1172 | int temp, lendiff, wsatend, od, nd; |
| 1173 | int current_invis_chars; |
| 1174 | int col_lendiff, col_temp; |
| 1175 | #if defined (HANDLE_MULTIBYTE) |
| 1176 | mbstate_t ps_new, ps_old; |
| 1177 | int new_offset, old_offset, tmp; |
| 1178 | #endif |
| 1179 | |
| 1180 | /* If we're at the right edge of a terminal that supports xn, we're |
| 1181 | ready to wrap around, so do so. This fixes problems with knowing |
| 1182 | the exact cursor position and cut-and-paste with certain terminal |
| 1183 | emulators. In this calculation, TEMP is the physical screen |
| 1184 | position of the cursor. */ |
| 1185 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1186 | temp = _rl_last_c_pos; |
| 1187 | else |
| 1188 | temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset); |
| 1189 | if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode |
| 1190 | && _rl_last_v_pos == current_line - 1) |
| 1191 | { |
| 1192 | #if defined (HANDLE_MULTIBYTE) |
| 1193 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1194 | { |
| 1195 | wchar_t wc; |
| 1196 | mbstate_t ps; |
| 1197 | int tempwidth, bytes; |
| 1198 | size_t ret; |
| 1199 | |
| 1200 | /* This fixes only double-column characters, but if the wrapped |
| 1201 | character comsumes more than three columns, spaces will be |
| 1202 | inserted in the string buffer. */ |
| 1203 | if (_rl_wrapped_line[current_line] > 0) |
| 1204 | _rl_clear_to_eol (_rl_wrapped_line[current_line]); |
| 1205 | |
| 1206 | memset (&ps, 0, sizeof (mbstate_t)); |
| 1207 | ret = mbrtowc (&wc, new, MB_CUR_MAX, &ps); |
| 1208 | if (MB_INVALIDCH (ret)) |
| 1209 | { |
| 1210 | tempwidth = 1; |
| 1211 | ret = 1; |
| 1212 | } |
| 1213 | else if (MB_NULLWCH (ret)) |
| 1214 | tempwidth = 0; |
| 1215 | else |
| 1216 | tempwidth = wcwidth (wc); |
| 1217 | |
| 1218 | if (tempwidth > 0) |
| 1219 | { |
| 1220 | int count; |
| 1221 | bytes = ret; |
| 1222 | for (count = 0; count < bytes; count++) |
| 1223 | putc (new[count], rl_outstream); |
| 1224 | _rl_last_c_pos = tempwidth; |
| 1225 | _rl_last_v_pos++; |
| 1226 | memset (&ps, 0, sizeof (mbstate_t)); |
| 1227 | ret = mbrtowc (&wc, old, MB_CUR_MAX, &ps); |
| 1228 | if (ret != 0 && bytes != 0) |
| 1229 | { |
| 1230 | if (MB_INVALIDCH (ret)) |
| 1231 | memmove (old+bytes, old+1, strlen (old+1)); |
| 1232 | else |
| 1233 | memmove (old+bytes, old+ret, strlen (old+ret)); |
| 1234 | memcpy (old, new, bytes); |
| 1235 | } |
| 1236 | } |
| 1237 | else |
| 1238 | { |
| 1239 | putc (' ', rl_outstream); |
| 1240 | _rl_last_c_pos = 1; |
| 1241 | _rl_last_v_pos++; |
| 1242 | if (old[0] && new[0]) |
| 1243 | old[0] = new[0]; |
| 1244 | } |
| 1245 | } |
| 1246 | else |
| 1247 | #endif |
| 1248 | { |
| 1249 | if (new[0]) |
| 1250 | putc (new[0], rl_outstream); |
| 1251 | else |
| 1252 | putc (' ', rl_outstream); |
| 1253 | _rl_last_c_pos = 1; |
| 1254 | _rl_last_v_pos++; |
| 1255 | if (old[0] && new[0]) |
| 1256 | old[0] = new[0]; |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | |
| 1261 | /* Find first difference. */ |
| 1262 | #if defined (HANDLE_MULTIBYTE) |
| 1263 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1264 | { |
| 1265 | /* See if the old line is a subset of the new line, so that the |
| 1266 | only change is adding characters. */ |
| 1267 | temp = (omax < nmax) ? omax : nmax; |
| 1268 | if (memcmp (old, new, temp) == 0) |
| 1269 | { |
| 1270 | ofd = old + temp; |
| 1271 | nfd = new + temp; |
| 1272 | } |
| 1273 | else |
| 1274 | { |
| 1275 | memset (&ps_new, 0, sizeof(mbstate_t)); |
| 1276 | memset (&ps_old, 0, sizeof(mbstate_t)); |
| 1277 | |
| 1278 | if (omax == nmax && STREQN (new, old, omax)) |
| 1279 | { |
| 1280 | ofd = old + omax; |
| 1281 | nfd = new + nmax; |
| 1282 | } |
| 1283 | else |
| 1284 | { |
| 1285 | new_offset = old_offset = 0; |
| 1286 | for (ofd = old, nfd = new; |
| 1287 | (ofd - old < omax) && *ofd && |
| 1288 | _rl_compare_chars(old, old_offset, &ps_old, new, new_offset, &ps_new); ) |
| 1289 | { |
| 1290 | old_offset = _rl_find_next_mbchar (old, old_offset, 1, MB_FIND_ANY); |
| 1291 | new_offset = _rl_find_next_mbchar (new, new_offset, 1, MB_FIND_ANY); |
| 1292 | ofd = old + old_offset; |
| 1293 | nfd = new + new_offset; |
| 1294 | } |
| 1295 | } |
| 1296 | } |
| 1297 | } |
| 1298 | else |
| 1299 | #endif |
| 1300 | for (ofd = old, nfd = new; |
| 1301 | (ofd - old < omax) && *ofd && (*ofd == *nfd); |
| 1302 | ofd++, nfd++) |
| 1303 | ; |
| 1304 | |
| 1305 | /* Move to the end of the screen line. ND and OD are used to keep track |
| 1306 | of the distance between ne and new and oe and old, respectively, to |
| 1307 | move a subtraction out of each loop. */ |
| 1308 | for (od = ofd - old, oe = ofd; od < omax && *oe; oe++, od++); |
| 1309 | for (nd = nfd - new, ne = nfd; nd < nmax && *ne; ne++, nd++); |
| 1310 | |
| 1311 | /* If no difference, continue to next line. */ |
| 1312 | if (ofd == oe && nfd == ne) |
| 1313 | return; |
| 1314 | |
| 1315 | wsatend = 1; /* flag for trailing whitespace */ |
| 1316 | |
| 1317 | #if defined (HANDLE_MULTIBYTE) |
| 1318 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1319 | { |
| 1320 | ols = old + _rl_find_prev_mbchar (old, oe - old, MB_FIND_ANY); |
| 1321 | nls = new + _rl_find_prev_mbchar (new, ne - new, MB_FIND_ANY); |
| 1322 | while ((ols > ofd) && (nls > nfd)) |
| 1323 | { |
| 1324 | memset (&ps_old, 0, sizeof (mbstate_t)); |
| 1325 | memset (&ps_new, 0, sizeof (mbstate_t)); |
| 1326 | |
| 1327 | #if 0 |
| 1328 | /* On advice from jir@yamato.ibm.com */ |
| 1329 | _rl_adjust_point (old, ols - old, &ps_old); |
| 1330 | _rl_adjust_point (new, nls - new, &ps_new); |
| 1331 | #endif |
| 1332 | |
| 1333 | if (_rl_compare_chars (old, ols - old, &ps_old, new, nls - new, &ps_new) == 0) |
| 1334 | break; |
| 1335 | |
| 1336 | if (*ols == ' ') |
| 1337 | wsatend = 0; |
| 1338 | |
| 1339 | ols = old + _rl_find_prev_mbchar (old, ols - old, MB_FIND_ANY); |
| 1340 | nls = new + _rl_find_prev_mbchar (new, nls - new, MB_FIND_ANY); |
| 1341 | } |
| 1342 | } |
| 1343 | else |
| 1344 | { |
| 1345 | #endif /* HANDLE_MULTIBYTE */ |
| 1346 | ols = oe - 1; /* find last same */ |
| 1347 | nls = ne - 1; |
| 1348 | while ((ols > ofd) && (nls > nfd) && (*ols == *nls)) |
| 1349 | { |
| 1350 | if (*ols != ' ') |
| 1351 | wsatend = 0; |
| 1352 | ols--; |
| 1353 | nls--; |
| 1354 | } |
| 1355 | #if defined (HANDLE_MULTIBYTE) |
| 1356 | } |
| 1357 | #endif |
| 1358 | |
| 1359 | if (wsatend) |
| 1360 | { |
| 1361 | ols = oe; |
| 1362 | nls = ne; |
| 1363 | } |
| 1364 | #if defined (HANDLE_MULTIBYTE) |
| 1365 | /* This may not work for stateful encoding, but who cares? To handle |
| 1366 | stateful encoding properly, we have to scan each string from the |
| 1367 | beginning and compare. */ |
| 1368 | else if (_rl_compare_chars (ols, 0, NULL, nls, 0, NULL) == 0) |
| 1369 | #else |
| 1370 | else if (*ols != *nls) |
| 1371 | #endif |
| 1372 | { |
| 1373 | if (*ols) /* don't step past the NUL */ |
| 1374 | { |
| 1375 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1376 | ols = old + _rl_find_next_mbchar (old, ols - old, 1, MB_FIND_ANY); |
| 1377 | else |
| 1378 | ols++; |
| 1379 | } |
| 1380 | if (*nls) |
| 1381 | { |
| 1382 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1383 | nls = new + _rl_find_next_mbchar (new, nls - new, 1, MB_FIND_ANY); |
| 1384 | else |
| 1385 | nls++; |
| 1386 | } |
| 1387 | } |
| 1388 | |
| 1389 | /* count of invisible characters in the current invisible line. */ |
| 1390 | current_invis_chars = W_OFFSET (current_line, wrap_offset); |
| 1391 | if (_rl_last_v_pos != current_line) |
| 1392 | { |
| 1393 | _rl_move_vert (current_line); |
| 1394 | if ((MB_CUR_MAX == 1 || rl_byte_oriented) && current_line == 0 && visible_wrap_offset) |
| 1395 | _rl_last_c_pos += visible_wrap_offset; |
| 1396 | } |
| 1397 | |
| 1398 | /* If this is the first line and there are invisible characters in the |
| 1399 | prompt string, and the prompt string has not changed, and the current |
| 1400 | cursor position is before the last invisible character in the prompt, |
| 1401 | and the index of the character to move to is past the end of the prompt |
| 1402 | string, then redraw the entire prompt string. We can only do this |
| 1403 | reliably if the terminal supports a `cr' capability. |
| 1404 | |
| 1405 | This is not an efficiency hack -- there is a problem with redrawing |
| 1406 | portions of the prompt string if they contain terminal escape |
| 1407 | sequences (like drawing the `unbold' sequence without a corresponding |
| 1408 | `bold') that manifests itself on certain terminals. */ |
| 1409 | |
| 1410 | lendiff = local_prompt ? strlen (local_prompt) : 0; |
| 1411 | od = ofd - old; /* index of first difference in visible line */ |
| 1412 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
| 1413 | _rl_term_cr && lendiff > prompt_visible_length && _rl_last_c_pos > 0 && |
| 1414 | od >= lendiff && _rl_last_c_pos <= prompt_last_invisible) |
| 1415 | { |
| 1416 | #if defined (__MSDOS__) |
| 1417 | putc ('\r', rl_outstream); |
| 1418 | #else |
| 1419 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1420 | #endif |
| 1421 | _rl_output_some_chars (local_prompt, lendiff); |
| 1422 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1423 | { |
| 1424 | /* We take wrap_offset into account here so we can pass correct |
| 1425 | information to _rl_move_cursor_relative. */ |
| 1426 | _rl_last_c_pos = _rl_col_width (local_prompt, 0, lendiff) - wrap_offset; |
| 1427 | cpos_adjusted = 1; |
| 1428 | } |
| 1429 | else |
| 1430 | _rl_last_c_pos = lendiff; |
| 1431 | } |
| 1432 | |
| 1433 | _rl_move_cursor_relative (od, old); |
| 1434 | |
| 1435 | /* if (len (new) > len (old)) |
| 1436 | lendiff == difference in buffer |
| 1437 | col_lendiff == difference on screen |
| 1438 | When not using multibyte characters, these are equal */ |
| 1439 | lendiff = (nls - nfd) - (ols - ofd); |
| 1440 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1441 | col_lendiff = _rl_col_width (new, nfd - new, nls - new) - _rl_col_width (old, ofd - old, ols - old); |
| 1442 | else |
| 1443 | col_lendiff = lendiff; |
| 1444 | |
| 1445 | /* If we are changing the number of invisible characters in a line, and |
| 1446 | the spot of first difference is before the end of the invisible chars, |
| 1447 | lendiff needs to be adjusted. */ |
| 1448 | if (current_line == 0 && !_rl_horizontal_scroll_mode && |
| 1449 | current_invis_chars != visible_wrap_offset) |
| 1450 | { |
| 1451 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1452 | { |
| 1453 | lendiff += visible_wrap_offset - current_invis_chars; |
| 1454 | col_lendiff += visible_wrap_offset - current_invis_chars; |
| 1455 | } |
| 1456 | else |
| 1457 | { |
| 1458 | lendiff += visible_wrap_offset - current_invis_chars; |
| 1459 | col_lendiff = lendiff; |
| 1460 | } |
| 1461 | } |
| 1462 | |
| 1463 | /* Insert (diff (len (old), len (new)) ch. */ |
| 1464 | temp = ne - nfd; |
| 1465 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1466 | col_temp = _rl_col_width (new, nfd - new, ne - new); |
| 1467 | else |
| 1468 | col_temp = temp; |
| 1469 | |
| 1470 | if (col_lendiff > 0) /* XXX - was lendiff */ |
| 1471 | { |
| 1472 | /* Non-zero if we're increasing the number of lines. */ |
| 1473 | int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin; |
| 1474 | /* Sometimes it is cheaper to print the characters rather than |
| 1475 | use the terminal's capabilities. If we're growing the number |
| 1476 | of lines, make sure we actually cause the new line to wrap |
| 1477 | around on auto-wrapping terminals. */ |
| 1478 | if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl)) |
| 1479 | { |
| 1480 | /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and |
| 1481 | _rl_horizontal_scroll_mode == 1, inserting the characters with |
| 1482 | _rl_term_IC or _rl_term_ic will screw up the screen because of the |
| 1483 | invisible characters. We need to just draw them. */ |
| 1484 | if (*ols && (!_rl_horizontal_scroll_mode || _rl_last_c_pos > 0 || |
| 1485 | lendiff <= prompt_visible_length || !current_invis_chars)) |
| 1486 | { |
| 1487 | insert_some_chars (nfd, lendiff, col_lendiff); |
| 1488 | _rl_last_c_pos += col_lendiff; |
| 1489 | } |
| 1490 | else if ((MB_CUR_MAX == 1 || rl_byte_oriented != 0) && *ols == 0 && lendiff > 0) |
| 1491 | { |
| 1492 | /* At the end of a line the characters do not have to |
| 1493 | be "inserted". They can just be placed on the screen. */ |
| 1494 | /* However, this screws up the rest of this block, which |
| 1495 | assumes you've done the insert because you can. */ |
| 1496 | _rl_output_some_chars (nfd, lendiff); |
| 1497 | _rl_last_c_pos += col_lendiff; |
| 1498 | } |
| 1499 | else |
| 1500 | { |
| 1501 | /* We have horizontal scrolling and we are not inserting at |
| 1502 | the end. We have invisible characters in this line. This |
| 1503 | is a dumb update. */ |
| 1504 | _rl_output_some_chars (nfd, temp); |
| 1505 | _rl_last_c_pos += col_temp; |
| 1506 | return; |
| 1507 | } |
| 1508 | /* Copy (new) chars to screen from first diff to last match. */ |
| 1509 | temp = nls - nfd; |
| 1510 | if ((temp - lendiff) > 0) |
| 1511 | { |
| 1512 | _rl_output_some_chars (nfd + lendiff, temp - lendiff); |
| 1513 | #if 1 |
| 1514 | /* XXX -- this bears closer inspection. Fixes a redisplay bug |
| 1515 | reported against bash-3.0-alpha by Andreas Schwab involving |
| 1516 | multibyte characters and prompt strings with invisible |
| 1517 | characters, but was previously disabled. */ |
| 1518 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff); |
| 1519 | #else |
| 1520 | _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff); |
| 1521 | #endif |
| 1522 | } |
| 1523 | } |
| 1524 | else |
| 1525 | { |
| 1526 | /* cannot insert chars, write to EOL */ |
| 1527 | _rl_output_some_chars (nfd, temp); |
| 1528 | _rl_last_c_pos += col_temp; |
| 1529 | /* If we're in a multibyte locale and were before the last invisible |
| 1530 | char in the current line (which implies we just output some invisible |
| 1531 | characters) we need to adjust _rl_last_c_pos, since it represents |
| 1532 | a physical character position. */ |
| 1533 | } |
| 1534 | } |
| 1535 | else /* Delete characters from line. */ |
| 1536 | { |
| 1537 | /* If possible and inexpensive to use terminal deletion, then do so. */ |
| 1538 | if (_rl_term_dc && (2 * col_temp) >= -col_lendiff) |
| 1539 | { |
| 1540 | /* If all we're doing is erasing the invisible characters in the |
| 1541 | prompt string, don't bother. It screws up the assumptions |
| 1542 | about what's on the screen. */ |
| 1543 | if (_rl_horizontal_scroll_mode && _rl_last_c_pos == 0 && |
| 1544 | -lendiff == visible_wrap_offset) |
| 1545 | col_lendiff = 0; |
| 1546 | |
| 1547 | if (col_lendiff) |
| 1548 | delete_chars (-col_lendiff); /* delete (diff) characters */ |
| 1549 | |
| 1550 | /* Copy (new) chars to screen from first diff to last match */ |
| 1551 | temp = nls - nfd; |
| 1552 | if (temp > 0) |
| 1553 | { |
| 1554 | _rl_output_some_chars (nfd, temp); |
| 1555 | _rl_last_c_pos += _rl_col_width (nfd, 0, temp);; |
| 1556 | } |
| 1557 | } |
| 1558 | /* Otherwise, print over the existing material. */ |
| 1559 | else |
| 1560 | { |
| 1561 | if (temp > 0) |
| 1562 | { |
| 1563 | _rl_output_some_chars (nfd, temp); |
| 1564 | _rl_last_c_pos += col_temp; /* XXX */ |
| 1565 | } |
| 1566 | lendiff = (oe - old) - (ne - new); |
| 1567 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1568 | col_lendiff = _rl_col_width (old, 0, oe - old) - _rl_col_width (new, 0, ne - new); |
| 1569 | else |
| 1570 | col_lendiff = lendiff; |
| 1571 | |
| 1572 | if (col_lendiff) |
| 1573 | { |
| 1574 | if (_rl_term_autowrap && current_line < inv_botlin) |
| 1575 | space_to_eol (col_lendiff); |
| 1576 | else |
| 1577 | _rl_clear_to_eol (col_lendiff); |
| 1578 | } |
| 1579 | } |
| 1580 | } |
| 1581 | } |
| 1582 | |
| 1583 | /* Tell the update routines that we have moved onto a new (empty) line. */ |
| 1584 | int |
| 1585 | rl_on_new_line () |
| 1586 | { |
| 1587 | if (visible_line) |
| 1588 | visible_line[0] = '\0'; |
| 1589 | |
| 1590 | _rl_last_c_pos = _rl_last_v_pos = 0; |
| 1591 | _rl_vis_botlin = last_lmargin = 0; |
| 1592 | if (vis_lbreaks) |
| 1593 | vis_lbreaks[0] = vis_lbreaks[1] = 0; |
| 1594 | visible_wrap_offset = 0; |
| 1595 | return 0; |
| 1596 | } |
| 1597 | |
| 1598 | /* Tell the update routines that we have moved onto a new line with the |
| 1599 | prompt already displayed. Code originally from the version of readline |
| 1600 | distributed with CLISP. rl_expand_prompt must have already been called |
| 1601 | (explicitly or implicitly). This still doesn't work exactly right. */ |
| 1602 | int |
| 1603 | rl_on_new_line_with_prompt () |
| 1604 | { |
| 1605 | int prompt_size, i, l, real_screenwidth, newlines; |
| 1606 | char *prompt_last_line, *lprompt; |
| 1607 | |
| 1608 | /* Initialize visible_line and invisible_line to ensure that they can hold |
| 1609 | the already-displayed prompt. */ |
| 1610 | prompt_size = strlen (rl_prompt) + 1; |
| 1611 | init_line_structures (prompt_size); |
| 1612 | |
| 1613 | /* Make sure the line structures hold the already-displayed prompt for |
| 1614 | redisplay. */ |
| 1615 | lprompt = local_prompt ? local_prompt : rl_prompt; |
| 1616 | strcpy (visible_line, lprompt); |
| 1617 | strcpy (invisible_line, lprompt); |
| 1618 | |
| 1619 | /* If the prompt contains newlines, take the last tail. */ |
| 1620 | prompt_last_line = strrchr (rl_prompt, '\n'); |
| 1621 | if (!prompt_last_line) |
| 1622 | prompt_last_line = rl_prompt; |
| 1623 | |
| 1624 | l = strlen (prompt_last_line); |
| 1625 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1626 | _rl_last_c_pos = _rl_col_width (prompt_last_line, 0, l); /* XXX */ |
| 1627 | else |
| 1628 | _rl_last_c_pos = l; |
| 1629 | |
| 1630 | /* Dissect prompt_last_line into screen lines. Note that here we have |
| 1631 | to use the real screenwidth. Readline's notion of screenwidth might be |
| 1632 | one less, see terminal.c. */ |
| 1633 | real_screenwidth = _rl_screenwidth + (_rl_term_autowrap ? 0 : 1); |
| 1634 | _rl_last_v_pos = l / real_screenwidth; |
| 1635 | /* If the prompt length is a multiple of real_screenwidth, we don't know |
| 1636 | whether the cursor is at the end of the last line, or already at the |
| 1637 | beginning of the next line. Output a newline just to be safe. */ |
| 1638 | if (l > 0 && (l % real_screenwidth) == 0) |
| 1639 | _rl_output_some_chars ("\n", 1); |
| 1640 | last_lmargin = 0; |
| 1641 | |
| 1642 | newlines = 0; i = 0; |
| 1643 | while (i <= l) |
| 1644 | { |
| 1645 | _rl_vis_botlin = newlines; |
| 1646 | vis_lbreaks[newlines++] = i; |
| 1647 | i += real_screenwidth; |
| 1648 | } |
| 1649 | vis_lbreaks[newlines] = l; |
| 1650 | visible_wrap_offset = 0; |
| 1651 | |
| 1652 | rl_display_prompt = rl_prompt; /* XXX - make sure it's set */ |
| 1653 | |
| 1654 | return 0; |
| 1655 | } |
| 1656 | |
| 1657 | /* Actually update the display, period. */ |
| 1658 | int |
| 1659 | rl_forced_update_display () |
| 1660 | { |
| 1661 | if (visible_line) |
| 1662 | { |
| 1663 | register char *temp = visible_line; |
| 1664 | |
| 1665 | while (*temp) |
| 1666 | *temp++ = '\0'; |
| 1667 | } |
| 1668 | rl_on_new_line (); |
| 1669 | forced_display++; |
| 1670 | (*rl_redisplay_function) (); |
| 1671 | return 0; |
| 1672 | } |
| 1673 | |
| 1674 | /* Move the cursor from _rl_last_c_pos to NEW, which are buffer indices. |
| 1675 | (Well, when we don't have multibyte characters, _rl_last_c_pos is a |
| 1676 | buffer index.) |
| 1677 | DATA is the contents of the screen line of interest; i.e., where |
| 1678 | the movement is being done. */ |
| 1679 | void |
| 1680 | _rl_move_cursor_relative (new, data) |
| 1681 | int new; |
| 1682 | const char *data; |
| 1683 | { |
| 1684 | register int i; |
| 1685 | int woff; /* number of invisible chars on current line */ |
| 1686 | int cpos, dpos; /* current and desired cursor positions */ |
| 1687 | |
| 1688 | woff = W_OFFSET (_rl_last_v_pos, wrap_offset); |
| 1689 | cpos = _rl_last_c_pos; |
| 1690 | #if defined (HANDLE_MULTIBYTE) |
| 1691 | /* If we have multibyte characters, NEW is indexed by the buffer point in |
| 1692 | a multibyte string, but _rl_last_c_pos is the display position. In |
| 1693 | this case, NEW's display position is not obvious and must be |
| 1694 | calculated. We need to account for invisible characters in this line, |
| 1695 | as long as we are past them and they are counted by _rl_col_width. */ |
| 1696 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1697 | { |
| 1698 | dpos = _rl_col_width (data, 0, new); |
| 1699 | if (dpos > woff) |
| 1700 | dpos -= woff; |
| 1701 | } |
| 1702 | else |
| 1703 | #endif |
| 1704 | dpos = new; |
| 1705 | |
| 1706 | /* If we don't have to do anything, then return. */ |
| 1707 | if (cpos == dpos) |
| 1708 | return; |
| 1709 | |
| 1710 | /* It may be faster to output a CR, and then move forwards instead |
| 1711 | of moving backwards. */ |
| 1712 | /* i == current physical cursor position. */ |
| 1713 | #if defined (HANDLE_MULTIBYTE) |
| 1714 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1715 | i = _rl_last_c_pos; |
| 1716 | else |
| 1717 | #endif |
| 1718 | i = _rl_last_c_pos - woff; |
| 1719 | if (new == 0 || CR_FASTER (new, _rl_last_c_pos) || |
| 1720 | (_rl_term_autowrap && i == _rl_screenwidth)) |
| 1721 | { |
| 1722 | #if defined (__MSDOS__) |
| 1723 | putc ('\r', rl_outstream); |
| 1724 | #else |
| 1725 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1726 | #endif /* !__MSDOS__ */ |
| 1727 | cpos = _rl_last_c_pos = 0; |
| 1728 | } |
| 1729 | |
| 1730 | if (cpos < dpos) |
| 1731 | { |
| 1732 | /* Move the cursor forward. We do it by printing the command |
| 1733 | to move the cursor forward if there is one, else print that |
| 1734 | portion of the output buffer again. Which is cheaper? */ |
| 1735 | |
| 1736 | /* The above comment is left here for posterity. It is faster |
| 1737 | to print one character (non-control) than to print a control |
| 1738 | sequence telling the terminal to move forward one character. |
| 1739 | That kind of control is for people who don't know what the |
| 1740 | data is underneath the cursor. */ |
| 1741 | #if defined (HACK_TERMCAP_MOTION) |
| 1742 | if (_rl_term_forward_char) |
| 1743 | { |
| 1744 | for (i = cpos; i < dpos; i++) |
| 1745 | tputs (_rl_term_forward_char, 1, _rl_output_character_function); |
| 1746 | } |
| 1747 | else |
| 1748 | #endif /* HACK_TERMCAP_MOTION */ |
| 1749 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
| 1750 | { |
| 1751 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1752 | for (i = 0; i < new; i++) |
| 1753 | putc (data[i], rl_outstream); |
| 1754 | } |
| 1755 | else |
| 1756 | for (i = cpos; i < new; i++) |
| 1757 | putc (data[i], rl_outstream); |
| 1758 | } |
| 1759 | |
| 1760 | #if defined (HANDLE_MULTIBYTE) |
| 1761 | /* NEW points to the buffer point, but _rl_last_c_pos is the display point. |
| 1762 | The byte length of the string is probably bigger than the column width |
| 1763 | of the string, which means that if NEW == _rl_last_c_pos, then NEW's |
| 1764 | display point is less than _rl_last_c_pos. */ |
| 1765 | #endif |
| 1766 | else if (cpos > dpos) |
| 1767 | _rl_backspace (cpos - dpos); |
| 1768 | |
| 1769 | _rl_last_c_pos = dpos; |
| 1770 | } |
| 1771 | |
| 1772 | /* PWP: move the cursor up or down. */ |
| 1773 | void |
| 1774 | _rl_move_vert (to) |
| 1775 | int to; |
| 1776 | { |
| 1777 | register int delta, i; |
| 1778 | |
| 1779 | if (_rl_last_v_pos == to || to > _rl_screenheight) |
| 1780 | return; |
| 1781 | |
| 1782 | if ((delta = to - _rl_last_v_pos) > 0) |
| 1783 | { |
| 1784 | for (i = 0; i < delta; i++) |
| 1785 | putc ('\n', rl_outstream); |
| 1786 | #if defined (__MSDOS__) |
| 1787 | putc ('\r', rl_outstream); |
| 1788 | #else |
| 1789 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 1790 | #endif |
| 1791 | _rl_last_c_pos = 0; |
| 1792 | } |
| 1793 | else |
| 1794 | { /* delta < 0 */ |
| 1795 | #ifdef __MSDOS__ |
| 1796 | int row, col; |
| 1797 | |
| 1798 | fflush (rl_outstream); /* make sure the cursor pos is current! */ |
| 1799 | ScreenGetCursor (&row, &col); |
| 1800 | ScreenSetCursor (row + delta, col); |
| 1801 | i = -delta; /* in case someone wants to use it after the loop */ |
| 1802 | #else /* !__MSDOS__ */ |
| 1803 | if (_rl_term_up && *_rl_term_up) |
| 1804 | for (i = 0; i < -delta; i++) |
| 1805 | tputs (_rl_term_up, 1, _rl_output_character_function); |
| 1806 | #endif /* !__MSDOS__ */ |
| 1807 | } |
| 1808 | |
| 1809 | _rl_last_v_pos = to; /* Now TO is here */ |
| 1810 | } |
| 1811 | |
| 1812 | /* Physically print C on rl_outstream. This is for functions which know |
| 1813 | how to optimize the display. Return the number of characters output. */ |
| 1814 | int |
| 1815 | rl_show_char (c) |
| 1816 | int c; |
| 1817 | { |
| 1818 | int n = 1; |
| 1819 | if (META_CHAR (c) && (_rl_output_meta_chars == 0)) |
| 1820 | { |
| 1821 | fprintf (rl_outstream, "M-"); |
| 1822 | n += 2; |
| 1823 | c = UNMETA (c); |
| 1824 | } |
| 1825 | |
| 1826 | #if defined (DISPLAY_TABS) |
| 1827 | if ((CTRL_CHAR (c) && c != '\t') || c == RUBOUT) |
| 1828 | #else |
| 1829 | if (CTRL_CHAR (c) || c == RUBOUT) |
| 1830 | #endif /* !DISPLAY_TABS */ |
| 1831 | { |
| 1832 | fprintf (rl_outstream, "C-"); |
| 1833 | n += 2; |
| 1834 | c = CTRL_CHAR (c) ? UNCTRL (c) : '?'; |
| 1835 | } |
| 1836 | |
| 1837 | putc (c, rl_outstream); |
| 1838 | fflush (rl_outstream); |
| 1839 | return n; |
| 1840 | } |
| 1841 | |
| 1842 | int |
| 1843 | rl_character_len (c, pos) |
| 1844 | register int c, pos; |
| 1845 | { |
| 1846 | unsigned char uc; |
| 1847 | |
| 1848 | uc = (unsigned char)c; |
| 1849 | |
| 1850 | if (META_CHAR (uc)) |
| 1851 | return ((_rl_output_meta_chars == 0) ? 4 : 1); |
| 1852 | |
| 1853 | if (uc == '\t') |
| 1854 | { |
| 1855 | #if defined (DISPLAY_TABS) |
| 1856 | return (((pos | 7) + 1) - pos); |
| 1857 | #else |
| 1858 | return (2); |
| 1859 | #endif /* !DISPLAY_TABS */ |
| 1860 | } |
| 1861 | |
| 1862 | if (CTRL_CHAR (c) || c == RUBOUT) |
| 1863 | return (2); |
| 1864 | |
| 1865 | return ((ISPRINT (uc)) ? 1 : 2); |
| 1866 | } |
| 1867 | /* How to print things in the "echo-area". The prompt is treated as a |
| 1868 | mini-modeline. */ |
| 1869 | static int msg_saved_prompt = 0; |
| 1870 | |
| 1871 | #if defined (USE_VARARGS) |
| 1872 | int |
| 1873 | #if defined (PREFER_STDARG) |
| 1874 | rl_message (const char *format, ...) |
| 1875 | #else |
| 1876 | rl_message (va_alist) |
| 1877 | va_dcl |
| 1878 | #endif |
| 1879 | { |
| 1880 | va_list args; |
| 1881 | #if defined (PREFER_VARARGS) |
| 1882 | char *format; |
| 1883 | #endif |
| 1884 | |
| 1885 | #if defined (PREFER_STDARG) |
| 1886 | va_start (args, format); |
| 1887 | #else |
| 1888 | va_start (args); |
| 1889 | format = va_arg (args, char *); |
| 1890 | #endif |
| 1891 | |
| 1892 | #if defined (HAVE_VSNPRINTF) |
| 1893 | vsnprintf (msg_buf, sizeof (msg_buf) - 1, format, args); |
| 1894 | #else |
| 1895 | vsprintf (msg_buf, format, args); |
| 1896 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
| 1897 | #endif |
| 1898 | va_end (args); |
| 1899 | |
| 1900 | if (saved_local_prompt == 0) |
| 1901 | { |
| 1902 | rl_save_prompt (); |
| 1903 | msg_saved_prompt = 1; |
| 1904 | } |
| 1905 | rl_display_prompt = msg_buf; |
| 1906 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
| 1907 | &prompt_last_invisible, |
| 1908 | &prompt_invis_chars_first_line, |
| 1909 | &prompt_physical_chars); |
| 1910 | local_prompt_prefix = (char *)NULL; |
| 1911 | (*rl_redisplay_function) (); |
| 1912 | |
| 1913 | return 0; |
| 1914 | } |
| 1915 | #else /* !USE_VARARGS */ |
| 1916 | int |
| 1917 | rl_message (format, arg1, arg2) |
| 1918 | char *format; |
| 1919 | { |
| 1920 | sprintf (msg_buf, format, arg1, arg2); |
| 1921 | msg_buf[sizeof(msg_buf) - 1] = '\0'; /* overflow? */ |
| 1922 | |
| 1923 | rl_display_prompt = msg_buf; |
| 1924 | if (saved_local_prompt == 0) |
| 1925 | { |
| 1926 | rl_save_prompt (); |
| 1927 | msg_saved_prompt = 1; |
| 1928 | } |
| 1929 | local_prompt = expand_prompt (msg_buf, &prompt_visible_length, |
| 1930 | &prompt_last_invisible, |
| 1931 | &prompt_invis_chars_first_line, |
| 1932 | &prompt_physical_chars); |
| 1933 | local_prompt_prefix = (char *)NULL; |
| 1934 | (*rl_redisplay_function) (); |
| 1935 | |
| 1936 | return 0; |
| 1937 | } |
| 1938 | #endif /* !USE_VARARGS */ |
| 1939 | |
| 1940 | /* How to clear things from the "echo-area". */ |
| 1941 | int |
| 1942 | rl_clear_message () |
| 1943 | { |
| 1944 | rl_display_prompt = rl_prompt; |
| 1945 | if (msg_saved_prompt) |
| 1946 | { |
| 1947 | rl_restore_prompt (); |
| 1948 | msg_saved_prompt = 0; |
| 1949 | } |
| 1950 | (*rl_redisplay_function) (); |
| 1951 | return 0; |
| 1952 | } |
| 1953 | |
| 1954 | int |
| 1955 | rl_reset_line_state () |
| 1956 | { |
| 1957 | rl_on_new_line (); |
| 1958 | |
| 1959 | rl_display_prompt = rl_prompt ? rl_prompt : ""; |
| 1960 | forced_display = 1; |
| 1961 | return 0; |
| 1962 | } |
| 1963 | |
| 1964 | void |
| 1965 | rl_save_prompt () |
| 1966 | { |
| 1967 | saved_local_prompt = local_prompt; |
| 1968 | saved_local_prefix = local_prompt_prefix; |
| 1969 | saved_prefix_length = prompt_prefix_length; |
| 1970 | saved_last_invisible = prompt_last_invisible; |
| 1971 | saved_visible_length = prompt_visible_length; |
| 1972 | saved_invis_chars_first_line = prompt_invis_chars_first_line; |
| 1973 | saved_physical_chars = prompt_physical_chars; |
| 1974 | |
| 1975 | local_prompt = local_prompt_prefix = (char *)0; |
| 1976 | prompt_last_invisible = prompt_visible_length = prompt_prefix_length = 0; |
| 1977 | prompt_invis_chars_first_line = prompt_physical_chars = 0; |
| 1978 | } |
| 1979 | |
| 1980 | void |
| 1981 | rl_restore_prompt () |
| 1982 | { |
| 1983 | FREE (local_prompt); |
| 1984 | FREE (local_prompt_prefix); |
| 1985 | |
| 1986 | local_prompt = saved_local_prompt; |
| 1987 | local_prompt_prefix = saved_local_prefix; |
| 1988 | prompt_prefix_length = saved_prefix_length; |
| 1989 | prompt_last_invisible = saved_last_invisible; |
| 1990 | prompt_visible_length = saved_visible_length; |
| 1991 | prompt_invis_chars_first_line = saved_invis_chars_first_line; |
| 1992 | prompt_physical_chars = saved_physical_chars; |
| 1993 | |
| 1994 | /* can test saved_local_prompt to see if prompt info has been saved. */ |
| 1995 | saved_local_prompt = saved_local_prefix = (char *)0; |
| 1996 | saved_last_invisible = saved_visible_length = saved_prefix_length = 0; |
| 1997 | saved_invis_chars_first_line = saved_physical_chars = 0; |
| 1998 | } |
| 1999 | |
| 2000 | char * |
| 2001 | _rl_make_prompt_for_search (pchar) |
| 2002 | int pchar; |
| 2003 | { |
| 2004 | int len; |
| 2005 | char *pmt, *p; |
| 2006 | |
| 2007 | rl_save_prompt (); |
| 2008 | |
| 2009 | /* We've saved the prompt, and can do anything with the various prompt |
| 2010 | strings we need before they're restored. We want the unexpanded |
| 2011 | portion of the prompt string after any final newline. */ |
| 2012 | p = rl_prompt ? strrchr (rl_prompt, '\n') : 0; |
| 2013 | if (p == 0) |
| 2014 | { |
| 2015 | len = (rl_prompt && *rl_prompt) ? strlen (rl_prompt) : 0; |
| 2016 | pmt = (char *)xmalloc (len + 2); |
| 2017 | if (len) |
| 2018 | strcpy (pmt, rl_prompt); |
| 2019 | pmt[len] = pchar; |
| 2020 | pmt[len+1] = '\0'; |
| 2021 | } |
| 2022 | else |
| 2023 | { |
| 2024 | p++; |
| 2025 | len = strlen (p); |
| 2026 | pmt = (char *)xmalloc (len + 2); |
| 2027 | if (len) |
| 2028 | strcpy (pmt, p); |
| 2029 | pmt[len] = pchar; |
| 2030 | pmt[len+1] = '\0'; |
| 2031 | } |
| 2032 | |
| 2033 | /* will be overwritten by expand_prompt, called from rl_message */ |
| 2034 | prompt_physical_chars = saved_physical_chars + 1; |
| 2035 | return pmt; |
| 2036 | } |
| 2037 | |
| 2038 | /* Quick redisplay hack when erasing characters at the end of the line. */ |
| 2039 | void |
| 2040 | _rl_erase_at_end_of_line (l) |
| 2041 | int l; |
| 2042 | { |
| 2043 | register int i; |
| 2044 | |
| 2045 | _rl_backspace (l); |
| 2046 | for (i = 0; i < l; i++) |
| 2047 | putc (' ', rl_outstream); |
| 2048 | _rl_backspace (l); |
| 2049 | for (i = 0; i < l; i++) |
| 2050 | visible_line[--_rl_last_c_pos] = '\0'; |
| 2051 | rl_display_fixed++; |
| 2052 | } |
| 2053 | |
| 2054 | /* Clear to the end of the line. COUNT is the minimum |
| 2055 | number of character spaces to clear, */ |
| 2056 | void |
| 2057 | _rl_clear_to_eol (count) |
| 2058 | int count; |
| 2059 | { |
| 2060 | #ifndef __MSDOS__ |
| 2061 | if (_rl_term_clreol) |
| 2062 | tputs (_rl_term_clreol, 1, _rl_output_character_function); |
| 2063 | else |
| 2064 | #endif |
| 2065 | if (count) |
| 2066 | space_to_eol (count); |
| 2067 | } |
| 2068 | |
| 2069 | /* Clear to the end of the line using spaces. COUNT is the minimum |
| 2070 | number of character spaces to clear, */ |
| 2071 | static void |
| 2072 | space_to_eol (count) |
| 2073 | int count; |
| 2074 | { |
| 2075 | register int i; |
| 2076 | |
| 2077 | for (i = 0; i < count; i++) |
| 2078 | putc (' ', rl_outstream); |
| 2079 | |
| 2080 | _rl_last_c_pos += count; |
| 2081 | } |
| 2082 | |
| 2083 | void |
| 2084 | _rl_clear_screen () |
| 2085 | { |
| 2086 | #if defined (__GO32__) |
| 2087 | ScreenClear (); /* FIXME: only works in text modes */ |
| 2088 | ScreenSetCursor (0, 0); /* term_clrpag is "cl" which homes the cursor */ |
| 2089 | #else |
| 2090 | if (_rl_term_clrpag) |
| 2091 | tputs (_rl_term_clrpag, 1, _rl_output_character_function); |
| 2092 | else |
| 2093 | rl_crlf (); |
| 2094 | #endif |
| 2095 | } |
| 2096 | |
| 2097 | /* Insert COUNT characters from STRING to the output stream at column COL. */ |
| 2098 | static void |
| 2099 | insert_some_chars (string, count, col) |
| 2100 | char *string; |
| 2101 | int count, col; |
| 2102 | { |
| 2103 | #if defined (__MSDOS__) || defined (__MINGW32__) |
| 2104 | _rl_output_some_chars (string, count); |
| 2105 | #else |
| 2106 | /* DEBUGGING */ |
| 2107 | if (MB_CUR_MAX == 1 || rl_byte_oriented) |
| 2108 | if (count != col) |
| 2109 | fprintf(stderr, "readline: debug: insert_some_chars: count (%d) != col (%d)\n", count, col); |
| 2110 | |
| 2111 | /* If IC is defined, then we do not have to "enter" insert mode. */ |
| 2112 | if (_rl_term_IC) |
| 2113 | { |
| 2114 | char *buffer; |
| 2115 | |
| 2116 | buffer = tgoto (_rl_term_IC, 0, col); |
| 2117 | tputs (buffer, 1, _rl_output_character_function); |
| 2118 | _rl_output_some_chars (string, count); |
| 2119 | } |
| 2120 | else |
| 2121 | { |
| 2122 | register int i; |
| 2123 | |
| 2124 | /* If we have to turn on insert-mode, then do so. */ |
| 2125 | if (_rl_term_im && *_rl_term_im) |
| 2126 | tputs (_rl_term_im, 1, _rl_output_character_function); |
| 2127 | |
| 2128 | /* If there is a special command for inserting characters, then |
| 2129 | use that first to open up the space. */ |
| 2130 | if (_rl_term_ic && *_rl_term_ic) |
| 2131 | { |
| 2132 | for (i = col; i--; ) |
| 2133 | tputs (_rl_term_ic, 1, _rl_output_character_function); |
| 2134 | } |
| 2135 | |
| 2136 | /* Print the text. */ |
| 2137 | _rl_output_some_chars (string, count); |
| 2138 | |
| 2139 | /* If there is a string to turn off insert mode, we had best use |
| 2140 | it now. */ |
| 2141 | if (_rl_term_ei && *_rl_term_ei) |
| 2142 | tputs (_rl_term_ei, 1, _rl_output_character_function); |
| 2143 | } |
| 2144 | #endif /* __MSDOS__ || __MINGW32__ */ |
| 2145 | } |
| 2146 | |
| 2147 | /* Delete COUNT characters from the display line. */ |
| 2148 | static void |
| 2149 | delete_chars (count) |
| 2150 | int count; |
| 2151 | { |
| 2152 | if (count > _rl_screenwidth) /* XXX */ |
| 2153 | return; |
| 2154 | |
| 2155 | #if !defined (__MSDOS__) && !defined (__MINGW32__) |
| 2156 | if (_rl_term_DC && *_rl_term_DC) |
| 2157 | { |
| 2158 | char *buffer; |
| 2159 | buffer = tgoto (_rl_term_DC, count, count); |
| 2160 | tputs (buffer, count, _rl_output_character_function); |
| 2161 | } |
| 2162 | else |
| 2163 | { |
| 2164 | if (_rl_term_dc && *_rl_term_dc) |
| 2165 | while (count--) |
| 2166 | tputs (_rl_term_dc, 1, _rl_output_character_function); |
| 2167 | } |
| 2168 | #endif /* !__MSDOS__ && !__MINGW32__ */ |
| 2169 | } |
| 2170 | |
| 2171 | void |
| 2172 | _rl_update_final () |
| 2173 | { |
| 2174 | int full_lines; |
| 2175 | |
| 2176 | full_lines = 0; |
| 2177 | /* If the cursor is the only thing on an otherwise-blank last line, |
| 2178 | compensate so we don't print an extra CRLF. */ |
| 2179 | if (_rl_vis_botlin && _rl_last_c_pos == 0 && |
| 2180 | visible_line[vis_lbreaks[_rl_vis_botlin]] == 0) |
| 2181 | { |
| 2182 | _rl_vis_botlin--; |
| 2183 | full_lines = 1; |
| 2184 | } |
| 2185 | _rl_move_vert (_rl_vis_botlin); |
| 2186 | /* If we've wrapped lines, remove the final xterm line-wrap flag. */ |
| 2187 | if (full_lines && _rl_term_autowrap && (VIS_LLEN(_rl_vis_botlin) == _rl_screenwidth)) |
| 2188 | { |
| 2189 | char *last_line; |
| 2190 | |
| 2191 | last_line = &visible_line[vis_lbreaks[_rl_vis_botlin]]; |
| 2192 | _rl_move_cursor_relative (_rl_screenwidth - 1, last_line); |
| 2193 | _rl_clear_to_eol (0); |
| 2194 | putc (last_line[_rl_screenwidth - 1], rl_outstream); |
| 2195 | } |
| 2196 | _rl_vis_botlin = 0; |
| 2197 | rl_crlf (); |
| 2198 | fflush (rl_outstream); |
| 2199 | rl_display_fixed++; |
| 2200 | } |
| 2201 | |
| 2202 | /* Move to the start of the current line. */ |
| 2203 | static void |
| 2204 | cr () |
| 2205 | { |
| 2206 | if (_rl_term_cr) |
| 2207 | { |
| 2208 | #if defined (__MSDOS__) |
| 2209 | putc ('\r', rl_outstream); |
| 2210 | #else |
| 2211 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 2212 | #endif |
| 2213 | _rl_last_c_pos = 0; |
| 2214 | } |
| 2215 | } |
| 2216 | |
| 2217 | /* Redraw the last line of a multi-line prompt that may possibly contain |
| 2218 | terminal escape sequences. Called with the cursor at column 0 of the |
| 2219 | line to draw the prompt on. */ |
| 2220 | static void |
| 2221 | redraw_prompt (t) |
| 2222 | char *t; |
| 2223 | { |
| 2224 | char *oldp; |
| 2225 | |
| 2226 | oldp = rl_display_prompt; |
| 2227 | rl_save_prompt (); |
| 2228 | |
| 2229 | rl_display_prompt = t; |
| 2230 | local_prompt = expand_prompt (t, &prompt_visible_length, |
| 2231 | &prompt_last_invisible, |
| 2232 | &prompt_invis_chars_first_line, |
| 2233 | &prompt_physical_chars); |
| 2234 | local_prompt_prefix = (char *)NULL; |
| 2235 | |
| 2236 | rl_forced_update_display (); |
| 2237 | |
| 2238 | rl_display_prompt = oldp; |
| 2239 | rl_restore_prompt(); |
| 2240 | } |
| 2241 | |
| 2242 | /* Redisplay the current line after a SIGWINCH is received. */ |
| 2243 | void |
| 2244 | _rl_redisplay_after_sigwinch () |
| 2245 | { |
| 2246 | char *t; |
| 2247 | |
| 2248 | /* Clear the current line and put the cursor at column 0. Make sure |
| 2249 | the right thing happens if we have wrapped to a new screen line. */ |
| 2250 | if (_rl_term_cr) |
| 2251 | { |
| 2252 | #if defined (__MSDOS__) |
| 2253 | putc ('\r', rl_outstream); |
| 2254 | #else |
| 2255 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 2256 | #endif |
| 2257 | _rl_last_c_pos = 0; |
| 2258 | #if defined (__MSDOS__) |
| 2259 | space_to_eol (_rl_screenwidth); |
| 2260 | putc ('\r', rl_outstream); |
| 2261 | #else |
| 2262 | if (_rl_term_clreol) |
| 2263 | tputs (_rl_term_clreol, 1, _rl_output_character_function); |
| 2264 | else |
| 2265 | { |
| 2266 | space_to_eol (_rl_screenwidth); |
| 2267 | tputs (_rl_term_cr, 1, _rl_output_character_function); |
| 2268 | } |
| 2269 | #endif |
| 2270 | if (_rl_last_v_pos > 0) |
| 2271 | _rl_move_vert (0); |
| 2272 | } |
| 2273 | else |
| 2274 | rl_crlf (); |
| 2275 | |
| 2276 | /* Redraw only the last line of a multi-line prompt. */ |
| 2277 | t = strrchr (rl_display_prompt, '\n'); |
| 2278 | if (t) |
| 2279 | redraw_prompt (++t); |
| 2280 | else |
| 2281 | rl_forced_update_display (); |
| 2282 | } |
| 2283 | |
| 2284 | void |
| 2285 | _rl_clean_up_for_exit () |
| 2286 | { |
| 2287 | if (readline_echoing_p) |
| 2288 | { |
| 2289 | _rl_move_vert (_rl_vis_botlin); |
| 2290 | _rl_vis_botlin = 0; |
| 2291 | fflush (rl_outstream); |
| 2292 | rl_restart_output (1, 0); |
| 2293 | } |
| 2294 | } |
| 2295 | |
| 2296 | void |
| 2297 | _rl_erase_entire_line () |
| 2298 | { |
| 2299 | cr (); |
| 2300 | _rl_clear_to_eol (0); |
| 2301 | cr (); |
| 2302 | fflush (rl_outstream); |
| 2303 | } |
| 2304 | |
| 2305 | /* return the `current display line' of the cursor -- the number of lines to |
| 2306 | move up to get to the first screen line of the current readline line. */ |
| 2307 | int |
| 2308 | _rl_current_display_line () |
| 2309 | { |
| 2310 | int ret, nleft; |
| 2311 | |
| 2312 | /* Find out whether or not there might be invisible characters in the |
| 2313 | editing buffer. */ |
| 2314 | if (rl_display_prompt == rl_prompt) |
| 2315 | nleft = _rl_last_c_pos - _rl_screenwidth - rl_visible_prompt_length; |
| 2316 | else |
| 2317 | nleft = _rl_last_c_pos - _rl_screenwidth; |
| 2318 | |
| 2319 | if (nleft > 0) |
| 2320 | ret = 1 + nleft / _rl_screenwidth; |
| 2321 | else |
| 2322 | ret = 0; |
| 2323 | |
| 2324 | return ret; |
| 2325 | } |
| 2326 | |
| 2327 | #if defined (HANDLE_MULTIBYTE) |
| 2328 | /* Calculate the number of screen columns occupied by STR from START to END. |
| 2329 | In the case of multibyte characters with stateful encoding, we have to |
| 2330 | scan from the beginning of the string to take the state into account. */ |
| 2331 | static int |
| 2332 | _rl_col_width (str, start, end) |
| 2333 | const char *str; |
| 2334 | int start, end; |
| 2335 | { |
| 2336 | wchar_t wc; |
| 2337 | mbstate_t ps = {0}; |
| 2338 | int tmp, point, width, max; |
| 2339 | |
| 2340 | if (end <= start) |
| 2341 | return 0; |
| 2342 | |
| 2343 | point = 0; |
| 2344 | max = end; |
| 2345 | |
| 2346 | while (point < start) |
| 2347 | { |
| 2348 | tmp = mbrlen (str + point, max, &ps); |
| 2349 | if (MB_INVALIDCH ((size_t)tmp)) |
| 2350 | { |
| 2351 | /* In this case, the bytes are invalid or too short to compose a |
| 2352 | multibyte character, so we assume that the first byte represents |
| 2353 | a single character. */ |
| 2354 | point++; |
| 2355 | max--; |
| 2356 | |
| 2357 | /* Clear the state of the byte sequence, because in this case the |
| 2358 | effect of mbstate is undefined. */ |
| 2359 | memset (&ps, 0, sizeof (mbstate_t)); |
| 2360 | } |
| 2361 | else if (MB_NULLWCH (tmp)) |
| 2362 | break; /* Found '\0' */ |
| 2363 | else |
| 2364 | { |
| 2365 | point += tmp; |
| 2366 | max -= tmp; |
| 2367 | } |
| 2368 | } |
| 2369 | |
| 2370 | /* If START is not a byte that starts a character, then POINT will be |
| 2371 | greater than START. In this case, assume that (POINT - START) gives |
| 2372 | a byte count that is the number of columns of difference. */ |
| 2373 | width = point - start; |
| 2374 | |
| 2375 | while (point < end) |
| 2376 | { |
| 2377 | tmp = mbrtowc (&wc, str + point, max, &ps); |
| 2378 | if (MB_INVALIDCH ((size_t)tmp)) |
| 2379 | { |
| 2380 | /* In this case, the bytes are invalid or too short to compose a |
| 2381 | multibyte character, so we assume that the first byte represents |
| 2382 | a single character. */ |
| 2383 | point++; |
| 2384 | max--; |
| 2385 | |
| 2386 | /* and assume that the byte occupies a single column. */ |
| 2387 | width++; |
| 2388 | |
| 2389 | /* Clear the state of the byte sequence, because in this case the |
| 2390 | effect of mbstate is undefined. */ |
| 2391 | memset (&ps, 0, sizeof (mbstate_t)); |
| 2392 | } |
| 2393 | else if (MB_NULLWCH (tmp)) |
| 2394 | break; /* Found '\0' */ |
| 2395 | else |
| 2396 | { |
| 2397 | point += tmp; |
| 2398 | max -= tmp; |
| 2399 | tmp = wcwidth(wc); |
| 2400 | width += (tmp >= 0) ? tmp : 1; |
| 2401 | } |
| 2402 | } |
| 2403 | |
| 2404 | width += point - end; |
| 2405 | |
| 2406 | return width; |
| 2407 | } |
| 2408 | #endif /* HANDLE_MULTIBYTE */ |