| 1 | /* kill.c -- kill ring management. */ |
| 2 | |
| 3 | /* Copyright (C) 1994-2017 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of the GNU Readline Library (Readline), a library |
| 6 | for reading lines of text with interactive input and history editing. |
| 7 | |
| 8 | Readline is free software: you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation, either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | Readline is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with Readline. If not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | |
| 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> /* for _POSIX_VERSION */ |
| 32 | #endif /* HAVE_UNISTD_H */ |
| 33 | |
| 34 | #if defined (HAVE_STDLIB_H) |
| 35 | # include <stdlib.h> |
| 36 | #else |
| 37 | # include "ansi_stdlib.h" |
| 38 | #endif /* HAVE_STDLIB_H */ |
| 39 | |
| 40 | #include <stdio.h> |
| 41 | |
| 42 | /* System-specific feature definitions and include files. */ |
| 43 | #include "rldefs.h" |
| 44 | |
| 45 | /* Some standard library routines. */ |
| 46 | #include "readline.h" |
| 47 | #include "history.h" |
| 48 | |
| 49 | #include "rlprivate.h" |
| 50 | #include "xmalloc.h" |
| 51 | |
| 52 | /* **************************************************************** */ |
| 53 | /* */ |
| 54 | /* Killing Mechanism */ |
| 55 | /* */ |
| 56 | /* **************************************************************** */ |
| 57 | |
| 58 | /* What we assume for a max number of kills. */ |
| 59 | #define DEFAULT_MAX_KILLS 10 |
| 60 | |
| 61 | /* The real variable to look at to find out when to flush kills. */ |
| 62 | static int rl_max_kills = DEFAULT_MAX_KILLS; |
| 63 | |
| 64 | /* Where to store killed text. */ |
| 65 | static char **rl_kill_ring = (char **)NULL; |
| 66 | |
| 67 | /* Where we are in the kill ring. */ |
| 68 | static int rl_kill_index; |
| 69 | |
| 70 | /* How many slots we have in the kill ring. */ |
| 71 | static int rl_kill_ring_length; |
| 72 | |
| 73 | static int _rl_copy_to_kill_ring PARAMS((char *, int)); |
| 74 | static int region_kill_internal PARAMS((int)); |
| 75 | static int _rl_copy_word_as_kill PARAMS((int, int)); |
| 76 | static int rl_yank_nth_arg_internal PARAMS((int, int, int)); |
| 77 | |
| 78 | /* How to say that you only want to save a certain amount |
| 79 | of kill material. */ |
| 80 | int |
| 81 | rl_set_retained_kills (int num) |
| 82 | { |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | /* Add TEXT to the kill ring, allocating a new kill ring slot as necessary. |
| 87 | This uses TEXT directly, so the caller must not free it. If APPEND is |
| 88 | non-zero, and the last command was a kill, the text is appended to the |
| 89 | current kill ring slot, otherwise prepended. */ |
| 90 | static int |
| 91 | _rl_copy_to_kill_ring (char *text, int append) |
| 92 | { |
| 93 | char *old, *new; |
| 94 | int slot; |
| 95 | |
| 96 | /* First, find the slot to work with. */ |
| 97 | if (_rl_last_command_was_kill == 0 || rl_kill_ring == 0) |
| 98 | { |
| 99 | /* Get a new slot. */ |
| 100 | if (rl_kill_ring == 0) |
| 101 | { |
| 102 | /* If we don't have any defined, then make one. */ |
| 103 | rl_kill_ring = (char **) |
| 104 | xmalloc (((rl_kill_ring_length = 1) + 1) * sizeof (char *)); |
| 105 | rl_kill_ring[slot = 0] = (char *)NULL; |
| 106 | } |
| 107 | else |
| 108 | { |
| 109 | /* We have to add a new slot on the end, unless we have |
| 110 | exceeded the max limit for remembering kills. */ |
| 111 | slot = rl_kill_ring_length; |
| 112 | if (slot == rl_max_kills) |
| 113 | { |
| 114 | register int i; |
| 115 | xfree (rl_kill_ring[0]); |
| 116 | for (i = 0; i < slot; i++) |
| 117 | rl_kill_ring[i] = rl_kill_ring[i + 1]; |
| 118 | } |
| 119 | else |
| 120 | { |
| 121 | slot = rl_kill_ring_length += 1; |
| 122 | rl_kill_ring = (char **)xrealloc (rl_kill_ring, (slot + 1) * sizeof (char *)); |
| 123 | } |
| 124 | rl_kill_ring[--slot] = (char *)NULL; |
| 125 | } |
| 126 | } |
| 127 | else |
| 128 | slot = rl_kill_ring_length - 1; |
| 129 | |
| 130 | /* If the last command was a kill, prepend or append. */ |
| 131 | if (_rl_last_command_was_kill && rl_kill_ring[slot] && rl_editing_mode != vi_mode) |
| 132 | { |
| 133 | old = rl_kill_ring[slot]; |
| 134 | new = (char *)xmalloc (1 + strlen (old) + strlen (text)); |
| 135 | |
| 136 | if (append) |
| 137 | { |
| 138 | strcpy (new, old); |
| 139 | strcat (new, text); |
| 140 | } |
| 141 | else |
| 142 | { |
| 143 | strcpy (new, text); |
| 144 | strcat (new, old); |
| 145 | } |
| 146 | xfree (old); |
| 147 | xfree (text); |
| 148 | rl_kill_ring[slot] = new; |
| 149 | } |
| 150 | else |
| 151 | rl_kill_ring[slot] = text; |
| 152 | |
| 153 | rl_kill_index = slot; |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | /* The way to kill something. This appends or prepends to the last |
| 158 | kill, if the last command was a kill command. if FROM is less |
| 159 | than TO, then the text is appended, otherwise prepended. If the |
| 160 | last command was not a kill command, then a new slot is made for |
| 161 | this kill. */ |
| 162 | int |
| 163 | rl_kill_text (int from, int to) |
| 164 | { |
| 165 | char *text; |
| 166 | |
| 167 | /* Is there anything to kill? */ |
| 168 | if (from == to) |
| 169 | { |
| 170 | _rl_last_command_was_kill++; |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | text = rl_copy_text (from, to); |
| 175 | |
| 176 | /* Delete the copied text from the line. */ |
| 177 | rl_delete_text (from, to); |
| 178 | |
| 179 | _rl_copy_to_kill_ring (text, from < to); |
| 180 | |
| 181 | _rl_last_command_was_kill++; |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | /* Now REMEMBER! In order to do prepending or appending correctly, kill |
| 186 | commands always make rl_point's original position be the FROM argument, |
| 187 | and rl_point's extent be the TO argument. */ |
| 188 | |
| 189 | /* **************************************************************** */ |
| 190 | /* */ |
| 191 | /* Killing Commands */ |
| 192 | /* */ |
| 193 | /* **************************************************************** */ |
| 194 | |
| 195 | /* Delete the word at point, saving the text in the kill ring. */ |
| 196 | int |
| 197 | rl_kill_word (int count, int key) |
| 198 | { |
| 199 | int orig_point; |
| 200 | |
| 201 | if (count < 0) |
| 202 | return (rl_backward_kill_word (-count, key)); |
| 203 | else |
| 204 | { |
| 205 | orig_point = rl_point; |
| 206 | rl_forward_word (count, key); |
| 207 | |
| 208 | if (rl_point != orig_point) |
| 209 | rl_kill_text (orig_point, rl_point); |
| 210 | |
| 211 | rl_point = orig_point; |
| 212 | if (rl_editing_mode == emacs_mode) |
| 213 | rl_mark = rl_point; |
| 214 | } |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | /* Rubout the word before point, placing it on the kill ring. */ |
| 219 | int |
| 220 | rl_backward_kill_word (int count, int key) |
| 221 | { |
| 222 | int orig_point; |
| 223 | |
| 224 | if (count < 0) |
| 225 | return (rl_kill_word (-count, key)); |
| 226 | else |
| 227 | { |
| 228 | orig_point = rl_point; |
| 229 | rl_backward_word (count, key); |
| 230 | |
| 231 | if (rl_point != orig_point) |
| 232 | rl_kill_text (orig_point, rl_point); |
| 233 | |
| 234 | if (rl_editing_mode == emacs_mode) |
| 235 | rl_mark = rl_point; |
| 236 | } |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | /* Kill from here to the end of the line. If DIRECTION is negative, kill |
| 241 | back to the line start instead. */ |
| 242 | int |
| 243 | rl_kill_line (int direction, int key) |
| 244 | { |
| 245 | int orig_point; |
| 246 | |
| 247 | if (direction < 0) |
| 248 | return (rl_backward_kill_line (1, key)); |
| 249 | else |
| 250 | { |
| 251 | orig_point = rl_point; |
| 252 | rl_end_of_line (1, key); |
| 253 | if (orig_point != rl_point) |
| 254 | rl_kill_text (orig_point, rl_point); |
| 255 | rl_point = orig_point; |
| 256 | if (rl_editing_mode == emacs_mode) |
| 257 | rl_mark = rl_point; |
| 258 | } |
| 259 | return 0; |
| 260 | } |
| 261 | |
| 262 | /* Kill backwards to the start of the line. If DIRECTION is negative, kill |
| 263 | forwards to the line end instead. */ |
| 264 | int |
| 265 | rl_backward_kill_line (int direction, int key) |
| 266 | { |
| 267 | int orig_point; |
| 268 | |
| 269 | if (direction < 0) |
| 270 | return (rl_kill_line (1, key)); |
| 271 | else |
| 272 | { |
| 273 | if (rl_point == 0) |
| 274 | rl_ding (); |
| 275 | else |
| 276 | { |
| 277 | orig_point = rl_point; |
| 278 | rl_beg_of_line (1, key); |
| 279 | if (rl_point != orig_point) |
| 280 | rl_kill_text (orig_point, rl_point); |
| 281 | if (rl_editing_mode == emacs_mode) |
| 282 | rl_mark = rl_point; |
| 283 | } |
| 284 | } |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | /* Kill the whole line, no matter where point is. */ |
| 289 | int |
| 290 | rl_kill_full_line (int count, int key) |
| 291 | { |
| 292 | rl_begin_undo_group (); |
| 293 | rl_point = 0; |
| 294 | rl_kill_text (rl_point, rl_end); |
| 295 | rl_mark = 0; |
| 296 | rl_end_undo_group (); |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | /* The next two functions mimic unix line editing behaviour, except they |
| 301 | save the deleted text on the kill ring. This is safer than not saving |
| 302 | it, and since we have a ring, nobody should get screwed. */ |
| 303 | |
| 304 | /* This does what C-w does in Unix. We can't prevent people from |
| 305 | using behaviour that they expect. */ |
| 306 | int |
| 307 | rl_unix_word_rubout (int count, int key) |
| 308 | { |
| 309 | int orig_point; |
| 310 | |
| 311 | if (rl_point == 0) |
| 312 | rl_ding (); |
| 313 | else |
| 314 | { |
| 315 | orig_point = rl_point; |
| 316 | if (count <= 0) |
| 317 | count = 1; |
| 318 | |
| 319 | while (count--) |
| 320 | { |
| 321 | while (rl_point && whitespace (rl_line_buffer[rl_point - 1])) |
| 322 | rl_point--; |
| 323 | |
| 324 | while (rl_point && (whitespace (rl_line_buffer[rl_point - 1]) == 0)) |
| 325 | rl_point--; /* XXX - multibyte? */ |
| 326 | } |
| 327 | |
| 328 | rl_kill_text (orig_point, rl_point); |
| 329 | if (rl_editing_mode == emacs_mode) |
| 330 | rl_mark = rl_point; |
| 331 | } |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | /* This deletes one filename component in a Unix pathname. That is, it |
| 337 | deletes backward to directory separator (`/') or whitespace. */ |
| 338 | int |
| 339 | rl_unix_filename_rubout (int count, int key) |
| 340 | { |
| 341 | int orig_point, c; |
| 342 | |
| 343 | if (rl_point == 0) |
| 344 | rl_ding (); |
| 345 | else |
| 346 | { |
| 347 | orig_point = rl_point; |
| 348 | if (count <= 0) |
| 349 | count = 1; |
| 350 | |
| 351 | while (count--) |
| 352 | { |
| 353 | c = rl_line_buffer[rl_point - 1]; |
| 354 | while (rl_point && (whitespace (c) || c == '/')) |
| 355 | { |
| 356 | rl_point--; |
| 357 | c = rl_line_buffer[rl_point - 1]; |
| 358 | } |
| 359 | |
| 360 | while (rl_point && (whitespace (c) == 0) && c != '/') |
| 361 | { |
| 362 | rl_point--; /* XXX - multibyte? */ |
| 363 | c = rl_line_buffer[rl_point - 1]; |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | rl_kill_text (orig_point, rl_point); |
| 368 | if (rl_editing_mode == emacs_mode) |
| 369 | rl_mark = rl_point; |
| 370 | } |
| 371 | |
| 372 | return 0; |
| 373 | } |
| 374 | |
| 375 | /* Here is C-u doing what Unix does. You don't *have* to use these |
| 376 | key-bindings. We have a choice of killing the entire line, or |
| 377 | killing from where we are to the start of the line. We choose the |
| 378 | latter, because if you are a Unix weenie, then you haven't backspaced |
| 379 | into the line at all, and if you aren't, then you know what you are |
| 380 | doing. */ |
| 381 | int |
| 382 | rl_unix_line_discard (int count, int key) |
| 383 | { |
| 384 | if (rl_point == 0) |
| 385 | rl_ding (); |
| 386 | else |
| 387 | { |
| 388 | rl_kill_text (rl_point, 0); |
| 389 | rl_point = 0; |
| 390 | if (rl_editing_mode == emacs_mode) |
| 391 | rl_mark = rl_point; |
| 392 | } |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | /* Copy the text in the `region' to the kill ring. If DELETE is non-zero, |
| 397 | delete the text from the line as well. */ |
| 398 | static int |
| 399 | region_kill_internal (int delete) |
| 400 | { |
| 401 | char *text; |
| 402 | |
| 403 | if (rl_mark != rl_point) |
| 404 | { |
| 405 | text = rl_copy_text (rl_point, rl_mark); |
| 406 | if (delete) |
| 407 | rl_delete_text (rl_point, rl_mark); |
| 408 | _rl_copy_to_kill_ring (text, rl_point < rl_mark); |
| 409 | } |
| 410 | |
| 411 | _rl_last_command_was_kill++; |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | /* Copy the text in the region to the kill ring. */ |
| 416 | int |
| 417 | rl_copy_region_to_kill (int count, int key) |
| 418 | { |
| 419 | return (region_kill_internal (0)); |
| 420 | } |
| 421 | |
| 422 | /* Kill the text between the point and mark. */ |
| 423 | int |
| 424 | rl_kill_region (int count, int key) |
| 425 | { |
| 426 | int r, npoint; |
| 427 | |
| 428 | npoint = (rl_point < rl_mark) ? rl_point : rl_mark; |
| 429 | r = region_kill_internal (1); |
| 430 | _rl_fix_point (1); |
| 431 | rl_point = npoint; |
| 432 | return r; |
| 433 | } |
| 434 | |
| 435 | /* Copy COUNT words to the kill ring. DIR says which direction we look |
| 436 | to find the words. */ |
| 437 | static int |
| 438 | _rl_copy_word_as_kill (int count, int dir) |
| 439 | { |
| 440 | int om, op, r; |
| 441 | |
| 442 | om = rl_mark; |
| 443 | op = rl_point; |
| 444 | |
| 445 | if (dir > 0) |
| 446 | rl_forward_word (count, 0); |
| 447 | else |
| 448 | rl_backward_word (count, 0); |
| 449 | |
| 450 | rl_mark = rl_point; |
| 451 | |
| 452 | if (dir > 0) |
| 453 | rl_backward_word (count, 0); |
| 454 | else |
| 455 | rl_forward_word (count, 0); |
| 456 | |
| 457 | r = region_kill_internal (0); |
| 458 | |
| 459 | rl_mark = om; |
| 460 | rl_point = op; |
| 461 | |
| 462 | return r; |
| 463 | } |
| 464 | |
| 465 | int |
| 466 | rl_copy_forward_word (int count, int key) |
| 467 | { |
| 468 | if (count < 0) |
| 469 | return (rl_copy_backward_word (-count, key)); |
| 470 | |
| 471 | return (_rl_copy_word_as_kill (count, 1)); |
| 472 | } |
| 473 | |
| 474 | int |
| 475 | rl_copy_backward_word (int count, int key) |
| 476 | { |
| 477 | if (count < 0) |
| 478 | return (rl_copy_forward_word (-count, key)); |
| 479 | |
| 480 | return (_rl_copy_word_as_kill (count, -1)); |
| 481 | } |
| 482 | |
| 483 | /* Yank back the last killed text. This ignores arguments. */ |
| 484 | int |
| 485 | rl_yank (int count, int key) |
| 486 | { |
| 487 | if (rl_kill_ring == 0) |
| 488 | { |
| 489 | _rl_abort_internal (); |
| 490 | return 1; |
| 491 | } |
| 492 | |
| 493 | _rl_set_mark_at_pos (rl_point); |
| 494 | rl_insert_text (rl_kill_ring[rl_kill_index]); |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | /* If the last command was yank, or yank_pop, and the text just |
| 499 | before point is identical to the current kill item, then |
| 500 | delete that text from the line, rotate the index down, and |
| 501 | yank back some other text. */ |
| 502 | int |
| 503 | rl_yank_pop (int count, int key) |
| 504 | { |
| 505 | int l, n; |
| 506 | |
| 507 | if (((rl_last_func != rl_yank_pop) && (rl_last_func != rl_yank)) || |
| 508 | !rl_kill_ring) |
| 509 | { |
| 510 | _rl_abort_internal (); |
| 511 | return 1; |
| 512 | } |
| 513 | |
| 514 | l = strlen (rl_kill_ring[rl_kill_index]); |
| 515 | n = rl_point - l; |
| 516 | if (n >= 0 && STREQN (rl_line_buffer + n, rl_kill_ring[rl_kill_index], l)) |
| 517 | { |
| 518 | rl_delete_text (n, rl_point); |
| 519 | rl_point = n; |
| 520 | rl_kill_index--; |
| 521 | if (rl_kill_index < 0) |
| 522 | rl_kill_index = rl_kill_ring_length - 1; |
| 523 | rl_yank (1, 0); |
| 524 | return 0; |
| 525 | } |
| 526 | else |
| 527 | { |
| 528 | _rl_abort_internal (); |
| 529 | return 1; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | #if defined (VI_MODE) |
| 534 | int |
| 535 | rl_vi_yank_pop (int count, int key) |
| 536 | { |
| 537 | int l, n; |
| 538 | |
| 539 | if (((rl_last_func != rl_vi_yank_pop) && (rl_last_func != rl_vi_put)) || |
| 540 | !rl_kill_ring) |
| 541 | { |
| 542 | _rl_abort_internal (); |
| 543 | return 1; |
| 544 | } |
| 545 | |
| 546 | l = strlen (rl_kill_ring[rl_kill_index]); |
| 547 | n = rl_point - l; |
| 548 | if (n >= 0 && STREQN (rl_line_buffer + n, rl_kill_ring[rl_kill_index], l)) |
| 549 | { |
| 550 | rl_delete_text (n, rl_point); |
| 551 | rl_point = n; |
| 552 | rl_kill_index--; |
| 553 | if (rl_kill_index < 0) |
| 554 | rl_kill_index = rl_kill_ring_length - 1; |
| 555 | rl_vi_put (1, 'p'); |
| 556 | return 0; |
| 557 | } |
| 558 | else |
| 559 | { |
| 560 | _rl_abort_internal (); |
| 561 | return 1; |
| 562 | } |
| 563 | } |
| 564 | #endif /* VI_MODE */ |
| 565 | |
| 566 | /* Yank the COUNTh argument from the previous history line, skipping |
| 567 | HISTORY_SKIP lines before looking for the `previous line'. */ |
| 568 | static int |
| 569 | rl_yank_nth_arg_internal (int count, int key, int history_skip) |
| 570 | { |
| 571 | register HIST_ENTRY *entry; |
| 572 | char *arg; |
| 573 | int i, pos; |
| 574 | |
| 575 | pos = where_history (); |
| 576 | |
| 577 | if (history_skip) |
| 578 | { |
| 579 | for (i = 0; i < history_skip; i++) |
| 580 | entry = previous_history (); |
| 581 | } |
| 582 | |
| 583 | entry = previous_history (); |
| 584 | |
| 585 | history_set_pos (pos); |
| 586 | |
| 587 | if (entry == 0) |
| 588 | { |
| 589 | rl_ding (); |
| 590 | return 1; |
| 591 | } |
| 592 | |
| 593 | arg = history_arg_extract (count, count, entry->line); |
| 594 | if (!arg || !*arg) |
| 595 | { |
| 596 | rl_ding (); |
| 597 | FREE (arg); |
| 598 | return 1; |
| 599 | } |
| 600 | |
| 601 | rl_begin_undo_group (); |
| 602 | |
| 603 | _rl_set_mark_at_pos (rl_point); |
| 604 | |
| 605 | #if defined (VI_MODE) |
| 606 | /* Vi mode always inserts a space before yanking the argument, and it |
| 607 | inserts it right *after* rl_point. */ |
| 608 | if (rl_editing_mode == vi_mode) |
| 609 | { |
| 610 | rl_vi_append_mode (1, key); |
| 611 | rl_insert_text (" "); |
| 612 | } |
| 613 | #endif /* VI_MODE */ |
| 614 | |
| 615 | rl_insert_text (arg); |
| 616 | xfree (arg); |
| 617 | |
| 618 | rl_end_undo_group (); |
| 619 | return 0; |
| 620 | } |
| 621 | |
| 622 | /* Yank the COUNTth argument from the previous history line. */ |
| 623 | int |
| 624 | rl_yank_nth_arg (int count, int key) |
| 625 | { |
| 626 | return (rl_yank_nth_arg_internal (count, key, 0)); |
| 627 | } |
| 628 | |
| 629 | /* Yank the last argument from the previous history line. This `knows' |
| 630 | how rl_yank_nth_arg treats a count of `$'. With an argument, this |
| 631 | behaves the same as rl_yank_nth_arg. */ |
| 632 | int |
| 633 | rl_yank_last_arg (int count, int key) |
| 634 | { |
| 635 | static int history_skip = 0; |
| 636 | static int explicit_arg_p = 0; |
| 637 | static int count_passed = 1; |
| 638 | static int direction = 1; |
| 639 | static int undo_needed = 0; |
| 640 | int retval; |
| 641 | |
| 642 | if (rl_last_func != rl_yank_last_arg) |
| 643 | { |
| 644 | history_skip = 0; |
| 645 | explicit_arg_p = rl_explicit_arg; |
| 646 | count_passed = count; |
| 647 | direction = 1; |
| 648 | } |
| 649 | else |
| 650 | { |
| 651 | if (undo_needed) |
| 652 | rl_do_undo (); |
| 653 | if (count < 0) /* XXX - was < 1 */ |
| 654 | direction = -direction; |
| 655 | history_skip += direction; |
| 656 | if (history_skip < 0) |
| 657 | history_skip = 0; |
| 658 | } |
| 659 | |
| 660 | if (explicit_arg_p) |
| 661 | retval = rl_yank_nth_arg_internal (count_passed, key, history_skip); |
| 662 | else |
| 663 | retval = rl_yank_nth_arg_internal ('$', key, history_skip); |
| 664 | |
| 665 | undo_needed = retval == 0; |
| 666 | return retval; |
| 667 | } |
| 668 | |
| 669 | /* Having read the special escape sequence denoting the beginning of a |
| 670 | `bracketed paste' sequence, read the rest of the pasted input until the |
| 671 | closing sequence and insert the pasted text as a single unit without |
| 672 | interpretation. */ |
| 673 | char * |
| 674 | _rl_bracketed_text (size_t *lenp) |
| 675 | { |
| 676 | int c; |
| 677 | size_t len, cap; |
| 678 | char *buf; |
| 679 | |
| 680 | len = 0; |
| 681 | buf = xmalloc (cap = 64); |
| 682 | buf[0] = '\0'; |
| 683 | |
| 684 | RL_SETSTATE (RL_STATE_MOREINPUT); |
| 685 | while ((c = rl_read_key ()) >= 0) |
| 686 | { |
| 687 | if (RL_ISSTATE (RL_STATE_MACRODEF)) |
| 688 | _rl_add_macro_char (c); |
| 689 | |
| 690 | if (c == '\r') /* XXX */ |
| 691 | c = '\n'; |
| 692 | |
| 693 | if (len == cap) |
| 694 | buf = xrealloc (buf, cap *= 2); |
| 695 | |
| 696 | buf[len++] = c; |
| 697 | if (len >= BRACK_PASTE_SLEN && c == BRACK_PASTE_LAST && |
| 698 | STREQN (buf + len - BRACK_PASTE_SLEN, BRACK_PASTE_SUFF, BRACK_PASTE_SLEN)) |
| 699 | { |
| 700 | len -= BRACK_PASTE_SLEN; |
| 701 | break; |
| 702 | } |
| 703 | } |
| 704 | RL_UNSETSTATE (RL_STATE_MOREINPUT); |
| 705 | |
| 706 | if (c >= 0) |
| 707 | { |
| 708 | if (len == cap) |
| 709 | buf = xrealloc (buf, cap + 1); |
| 710 | buf[len] = '\0'; |
| 711 | } |
| 712 | |
| 713 | if (lenp) |
| 714 | *lenp = len; |
| 715 | return (buf); |
| 716 | } |
| 717 | |
| 718 | int |
| 719 | rl_bracketed_paste_begin (int count, int key) |
| 720 | { |
| 721 | int retval, c; |
| 722 | size_t len, cap; |
| 723 | char *buf; |
| 724 | |
| 725 | buf = _rl_bracketed_text (&len); |
| 726 | retval = rl_insert_text (buf) == len ? 0 : 1; |
| 727 | |
| 728 | xfree (buf); |
| 729 | return (retval); |
| 730 | } |
| 731 | |
| 732 | /* A special paste command for Windows users. */ |
| 733 | #if defined (_WIN32) |
| 734 | #include <windows.h> |
| 735 | |
| 736 | int |
| 737 | rl_paste_from_clipboard (int count, int key) |
| 738 | { |
| 739 | char *data, *ptr; |
| 740 | int len; |
| 741 | |
| 742 | if (OpenClipboard (NULL) == 0) |
| 743 | return (0); |
| 744 | |
| 745 | data = (char *)GetClipboardData (CF_TEXT); |
| 746 | if (data) |
| 747 | { |
| 748 | ptr = strchr (data, '\r'); |
| 749 | if (ptr) |
| 750 | { |
| 751 | len = ptr - data; |
| 752 | ptr = (char *)xmalloc (len + 1); |
| 753 | ptr[len] = '\0'; |
| 754 | strncpy (ptr, data, len); |
| 755 | } |
| 756 | else |
| 757 | ptr = data; |
| 758 | _rl_set_mark_at_pos (rl_point); |
| 759 | rl_insert_text (ptr); |
| 760 | if (ptr != data) |
| 761 | xfree (ptr); |
| 762 | CloseClipboard (); |
| 763 | } |
| 764 | return (0); |
| 765 | } |
| 766 | #endif /* _WIN32 */ |