1 /* $OpenBSD$ */ 2 3 /* 4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <stdlib.h> 22 #include <string.h> 23 24 #include "tmux.h" 25 26 /* 27 * This file is rather misleadingly named, it contains the code which takes a 28 * key code and translates it into something suitable to be sent to the 29 * application running in a pane (similar to input.c does in the other 30 * direction with output). 31 */ 32 33 static void input_key_mouse(struct window_pane *, struct mouse_event *); 34 35 /* Entry in the key tree. */ 36 struct input_key_entry { 37 key_code key; 38 const char *data; 39 40 RB_ENTRY(input_key_entry) entry; 41 }; 42 RB_HEAD(input_key_tree, input_key_entry); 43 44 /* Tree of input keys. */ 45 static int input_key_cmp(struct input_key_entry *, 46 struct input_key_entry *); 47 RB_GENERATE_STATIC(input_key_tree, input_key_entry, entry, input_key_cmp); 48 struct input_key_tree input_key_tree = RB_INITIALIZER(&input_key_tree); 49 50 /* List of default keys, the tree is built from this. */ 51 static struct input_key_entry input_key_defaults[] = { 52 /* Paste keys. */ 53 { .key = KEYC_PASTE_START, 54 .data = "\033[200~" 55 }, 56 { .key = KEYC_PASTE_END, 57 .data = "\033[201~" 58 }, 59 60 /* Function keys. */ 61 { .key = KEYC_F1, 62 .data = "\033OP" 63 }, 64 { .key = KEYC_F2, 65 .data = "\033OQ" 66 }, 67 { .key = KEYC_F3, 68 .data = "\033OR" 69 }, 70 { .key = KEYC_F4, 71 .data = "\033OS" 72 }, 73 { .key = KEYC_F5, 74 .data = "\033[15~" 75 }, 76 { .key = KEYC_F6, 77 .data = "\033[17~" 78 }, 79 { .key = KEYC_F7, 80 .data = "\033[18~" 81 }, 82 { .key = KEYC_F8, 83 .data = "\033[19~" 84 }, 85 { .key = KEYC_F9, 86 .data = "\033[20~" 87 }, 88 { .key = KEYC_F10, 89 .data = "\033[21~" 90 }, 91 { .key = KEYC_F11, 92 .data = "\033[23~" 93 }, 94 { .key = KEYC_F12, 95 .data = "\033[24~" 96 }, 97 { .key = KEYC_IC, 98 .data = "\033[2~" 99 }, 100 { .key = KEYC_DC, 101 .data = "\033[3~" 102 }, 103 { .key = KEYC_HOME, 104 .data = "\033[1~" 105 }, 106 { .key = KEYC_END, 107 .data = "\033[4~" 108 }, 109 { .key = KEYC_NPAGE, 110 .data = "\033[6~" 111 }, 112 { .key = KEYC_PPAGE, 113 .data = "\033[5~" 114 }, 115 { .key = KEYC_BTAB, 116 .data = "\033[Z" 117 }, 118 119 /* Arrow keys. */ 120 { .key = KEYC_UP|KEYC_CURSOR, 121 .data = "\033OA" 122 }, 123 { .key = KEYC_DOWN|KEYC_CURSOR, 124 .data = "\033OB" 125 }, 126 { .key = KEYC_RIGHT|KEYC_CURSOR, 127 .data = "\033OC" 128 }, 129 { .key = KEYC_LEFT|KEYC_CURSOR, 130 .data = "\033OD" 131 }, 132 { .key = KEYC_UP, 133 .data = "\033[A" 134 }, 135 { .key = KEYC_DOWN, 136 .data = "\033[B" 137 }, 138 { .key = KEYC_RIGHT, 139 .data = "\033[C" 140 }, 141 { .key = KEYC_LEFT, 142 .data = "\033[D" 143 }, 144 145 /* Keypad keys. */ 146 { .key = KEYC_KP_SLASH|KEYC_KEYPAD, 147 .data = "\033Oo" 148 }, 149 { .key = KEYC_KP_STAR|KEYC_KEYPAD, 150 .data = "\033Oj" 151 }, 152 { .key = KEYC_KP_MINUS|KEYC_KEYPAD, 153 .data = "\033Om" 154 }, 155 { .key = KEYC_KP_SEVEN|KEYC_KEYPAD, 156 .data = "\033Ow" 157 }, 158 { .key = KEYC_KP_EIGHT|KEYC_KEYPAD, 159 .data = "\033Ox" 160 }, 161 { .key = KEYC_KP_NINE|KEYC_KEYPAD, 162 .data = "\033Oy" 163 }, 164 { .key = KEYC_KP_PLUS|KEYC_KEYPAD, 165 .data = "\033Ok" 166 }, 167 { .key = KEYC_KP_FOUR|KEYC_KEYPAD, 168 .data = "\033Ot" 169 }, 170 { .key = KEYC_KP_FIVE|KEYC_KEYPAD, 171 .data = "\033Ou" 172 }, 173 { .key = KEYC_KP_SIX|KEYC_KEYPAD, 174 .data = "\033Ov" 175 }, 176 { .key = KEYC_KP_ONE|KEYC_KEYPAD, 177 .data = "\033Oq" 178 }, 179 { .key = KEYC_KP_TWO|KEYC_KEYPAD, 180 .data = "\033Or" 181 }, 182 { .key = KEYC_KP_THREE|KEYC_KEYPAD, 183 .data = "\033Os" 184 }, 185 { .key = KEYC_KP_ENTER|KEYC_KEYPAD, 186 .data = "\033OM" 187 }, 188 { .key = KEYC_KP_ZERO|KEYC_KEYPAD, 189 .data = "\033Op" 190 }, 191 { .key = KEYC_KP_PERIOD|KEYC_KEYPAD, 192 .data = "\033On" 193 }, 194 { .key = KEYC_KP_SLASH, 195 .data = "/" 196 }, 197 { .key = KEYC_KP_STAR, 198 .data = "*" 199 }, 200 { .key = KEYC_KP_MINUS, 201 .data = "-" 202 }, 203 { .key = KEYC_KP_SEVEN, 204 .data = "7" 205 }, 206 { .key = KEYC_KP_EIGHT, 207 .data = "8" 208 }, 209 { .key = KEYC_KP_NINE, 210 .data = "9" 211 }, 212 { .key = KEYC_KP_PLUS, 213 .data = "+" 214 }, 215 { .key = KEYC_KP_FOUR, 216 .data = "4" 217 }, 218 { .key = KEYC_KP_FIVE, 219 .data = "5" 220 }, 221 { .key = KEYC_KP_SIX, 222 .data = "6" 223 }, 224 { .key = KEYC_KP_ONE, 225 .data = "1" 226 }, 227 { .key = KEYC_KP_TWO, 228 .data = "2" 229 }, 230 { .key = KEYC_KP_THREE, 231 .data = "3" 232 }, 233 { .key = KEYC_KP_ENTER, 234 .data = "\n" 235 }, 236 { .key = KEYC_KP_ZERO, 237 .data = "0" 238 }, 239 { .key = KEYC_KP_PERIOD, 240 .data = "." 241 }, 242 243 /* Keys with an embedded modifier. */ 244 { .key = KEYC_F1|KEYC_BUILD_MODIFIERS, 245 .data = "\033[1;_P" 246 }, 247 { .key = KEYC_F2|KEYC_BUILD_MODIFIERS, 248 .data = "\033[1;_Q" 249 }, 250 { .key = KEYC_F3|KEYC_BUILD_MODIFIERS, 251 .data = "\033[1;_R" 252 }, 253 { .key = KEYC_F4|KEYC_BUILD_MODIFIERS, 254 .data = "\033[1;_S" 255 }, 256 { .key = KEYC_F5|KEYC_BUILD_MODIFIERS, 257 .data = "\033[15;_~" 258 }, 259 { .key = KEYC_F6|KEYC_BUILD_MODIFIERS, 260 .data = "\033[17;_~" 261 }, 262 { .key = KEYC_F7|KEYC_BUILD_MODIFIERS, 263 .data = "\033[18;_~" 264 }, 265 { .key = KEYC_F8|KEYC_BUILD_MODIFIERS, 266 .data = "\033[19;_~" 267 }, 268 { .key = KEYC_F9|KEYC_BUILD_MODIFIERS, 269 .data = "\033[20;_~" 270 }, 271 { .key = KEYC_F10|KEYC_BUILD_MODIFIERS, 272 .data = "\033[21;_~" 273 }, 274 { .key = KEYC_F11|KEYC_BUILD_MODIFIERS, 275 .data = "\033[23;_~" 276 }, 277 { .key = KEYC_F12|KEYC_BUILD_MODIFIERS, 278 .data = "\033[24;_~" 279 }, 280 { .key = KEYC_UP|KEYC_BUILD_MODIFIERS, 281 .data = "\033[1;_A" 282 }, 283 { .key = KEYC_DOWN|KEYC_BUILD_MODIFIERS, 284 .data = "\033[1;_B" 285 }, 286 { .key = KEYC_RIGHT|KEYC_BUILD_MODIFIERS, 287 .data = "\033[1;_C" 288 }, 289 { .key = KEYC_LEFT|KEYC_BUILD_MODIFIERS, 290 .data = "\033[1;_D" 291 }, 292 { .key = KEYC_HOME|KEYC_BUILD_MODIFIERS, 293 .data = "\033[1;_H" 294 }, 295 { .key = KEYC_END|KEYC_BUILD_MODIFIERS, 296 .data = "\033[1;_F" 297 }, 298 { .key = KEYC_PPAGE|KEYC_BUILD_MODIFIERS, 299 .data = "\033[5;_~" 300 }, 301 { .key = KEYC_NPAGE|KEYC_BUILD_MODIFIERS, 302 .data = "\033[6;_~" 303 }, 304 { .key = KEYC_IC|KEYC_BUILD_MODIFIERS, 305 .data = "\033[2;_~" 306 }, 307 { .key = KEYC_DC|KEYC_BUILD_MODIFIERS, 308 .data = "\033[3;_~" 309 }, 310 }; 311 static const key_code input_key_modifiers[] = { 312 0, 313 0, 314 KEYC_SHIFT, 315 KEYC_META|KEYC_IMPLIED_META, 316 KEYC_SHIFT|KEYC_META|KEYC_IMPLIED_META, 317 KEYC_CTRL, 318 KEYC_SHIFT|KEYC_CTRL, 319 KEYC_META|KEYC_IMPLIED_META|KEYC_CTRL, 320 KEYC_SHIFT|KEYC_META|KEYC_IMPLIED_META|KEYC_CTRL 321 }; 322 323 /* Input key comparison function. */ 324 static int 325 input_key_cmp(struct input_key_entry *ike1, struct input_key_entry *ike2) 326 { 327 if (ike1->key < ike2->key) 328 return (-1); 329 if (ike1->key > ike2->key) 330 return (1); 331 return (0); 332 } 333 334 /* Look for key in tree. */ 335 static struct input_key_entry * 336 input_key_get(key_code key) 337 { 338 struct input_key_entry entry = { .key = key }; 339 340 return (RB_FIND(input_key_tree, &input_key_tree, &entry)); 341 } 342 343 /* Split a character into two UTF-8 bytes. */ 344 static size_t 345 input_key_split2(u_int c, char *dst) 346 { 347 if (c > 0x7f) { 348 dst[0] = (c >> 6) | 0xc0; 349 dst[1] = (c & 0x3f) | 0x80; 350 return (2); 351 } 352 dst[0] = c; 353 return (1); 354 } 355 356 /* Build input key tree. */ 357 void 358 input_key_build(void) 359 { 360 struct input_key_entry *ike, *new; 361 u_int i, j; 362 char *data; 363 key_code key; 364 365 for (i = 0; i < nitems(input_key_defaults); i++) { 366 ike = &input_key_defaults[i]; 367 if (~ike->key & KEYC_BUILD_MODIFIERS) { 368 RB_INSERT(input_key_tree, &input_key_tree, ike); 369 continue; 370 } 371 372 for (j = 2; j < nitems(input_key_modifiers); j++) { 373 key = (ike->key & ~KEYC_BUILD_MODIFIERS); 374 data = xstrdup(ike->data); 375 data[strcspn(data, "_")] = '0' + j; 376 377 new = xcalloc(1, sizeof *new); 378 new->key = key|input_key_modifiers[j]; 379 new->data = data; 380 RB_INSERT(input_key_tree, &input_key_tree, new); 381 } 382 } 383 384 RB_FOREACH(ike, input_key_tree, &input_key_tree) { 385 log_debug("%s: 0x%llx (%s) is %s", __func__, ike->key, 386 key_string_lookup_key(ike->key, 1), ike->data); 387 } 388 } 389 390 /* Translate a key code into an output key sequence for a pane. */ 391 int 392 input_key_pane(struct window_pane *wp, key_code key, struct mouse_event *m) 393 { 394 if (log_get_level() != 0) { 395 log_debug("writing key 0x%llx (%s) to %%%u", key, 396 key_string_lookup_key(key, 1), wp->id); 397 } 398 399 if (KEYC_IS_MOUSE(key)) { 400 if (m != NULL && m->wp != -1 && (u_int)m->wp == wp->id) 401 input_key_mouse(wp, m); 402 return (0); 403 } 404 return (input_key(wp->screen, wp->event, key)); 405 } 406 407 static void 408 input_key_write(const char *from, struct bufferevent *bev, const char *data, 409 size_t size) 410 { 411 log_debug("%s: %.*s", from, (int)size, (const char *)data); 412 bufferevent_write(bev, data, size); 413 } 414 415 /* 416 * Encode and write an extended key escape sequence in one of the two 417 * possible formats, depending on the configured output mode. 418 */ 419 static int 420 input_key_extended(struct bufferevent *bev, key_code key) 421 { 422 char tmp[64], modifier; 423 struct utf8_data ud; 424 wchar_t wc; 425 426 switch (key & KEYC_MASK_MODIFIERS) { 427 case KEYC_SHIFT: 428 modifier = '2'; 429 break; 430 case KEYC_META: 431 modifier = '3'; 432 break; 433 case KEYC_SHIFT|KEYC_META: 434 modifier = '4'; 435 break; 436 case KEYC_CTRL: 437 modifier = '5'; 438 break; 439 case KEYC_SHIFT|KEYC_CTRL: 440 modifier = '6'; 441 break; 442 case KEYC_META|KEYC_CTRL: 443 modifier = '7'; 444 break; 445 case KEYC_SHIFT|KEYC_META|KEYC_CTRL: 446 modifier = '8'; 447 break; 448 default: 449 return (-1); 450 } 451 452 if (KEYC_IS_UNICODE(key)) { 453 utf8_to_data(key & KEYC_MASK_KEY, &ud); 454 if (utf8_towc(&ud, &wc) == UTF8_DONE) 455 key = wc; 456 else 457 return (-1); 458 } else 459 key &= KEYC_MASK_KEY; 460 461 if (options_get_number(global_options, "extended-keys-format") == 1) 462 xsnprintf(tmp, sizeof tmp, "\033[27;%c;%llu~", modifier, key); 463 else 464 xsnprintf(tmp, sizeof tmp, "\033[%llu;%cu", key, modifier); 465 466 input_key_write(__func__, bev, tmp, strlen(tmp)); 467 return (0); 468 } 469 470 /* 471 * Outputs the key in the "standard" mode. This is by far the most 472 * complicated output mode, with a lot of remapping in order to 473 * emulate quirks of terminals that today can be only found in museums. 474 */ 475 static int 476 input_key_vt10x(struct bufferevent *bev, key_code key) 477 { 478 struct utf8_data ud; 479 key_code onlykey; 480 char *p; 481 static const char *standard_map[2] = { 482 "1!9(0)=+;:'\",<.>/-8? 2", 483 "119900=+;;'',,..\x1f\x1f\x7f\x7f\0\0", 484 }; 485 486 log_debug("%s: key in %llx", __func__, key); 487 488 if (key & KEYC_META) 489 input_key_write(__func__, bev, "\033", 1); 490 491 /* 492 * There's no way to report modifiers for unicode keys in standard mode 493 * so lose the modifiers. 494 */ 495 if (KEYC_IS_UNICODE(key)) { 496 utf8_to_data(key, &ud); 497 input_key_write(__func__, bev, (const char *)ud.data, ud.size); 498 return (0); 499 } 500 501 /* Prevent TAB and RET from being swallowed by C0 remapping logic. */ 502 onlykey = key & KEYC_MASK_KEY; 503 if (onlykey == '\r' || onlykey == '\t') 504 key &= ~KEYC_CTRL; 505 506 /* 507 * Convert keys with Ctrl modifier into corresponding C0 control codes, 508 * with the exception of *some* keys, which are remapped into printable 509 * ASCII characters. 510 * 511 * There is no special handling for Shift modifier, which is pretty 512 * much redundant anyway, as no terminal will send <base key>|SHIFT, 513 * but only <shifted key>|SHIFT. 514 */ 515 if (key & KEYC_CTRL) { 516 p = strchr(standard_map[0], onlykey); 517 if (p != NULL) 518 key = standard_map[1][p - standard_map[0]]; 519 else if (onlykey >= '3' && onlykey <= '7') 520 key = onlykey - '\030'; 521 else if (onlykey >= '@' && onlykey <= '~') 522 key = onlykey & 0x1f; 523 else 524 return (-1); 525 } 526 527 log_debug("%s: key out %llx", __func__, key); 528 529 ud.data[0] = key & 0x7f; 530 input_key_write(__func__, bev, (const char *)&ud.data[0], 1); 531 return (0); 532 } 533 534 /* Pick keys that are reported as vt10x keys in modifyOtherKeys=1 mode. */ 535 static int 536 input_key_mode1(struct bufferevent *bev, key_code key) 537 { 538 key_code onlykey; 539 540 log_debug("%s: key in %llx", __func__, key); 541 542 /* 543 * As per 544 * https://invisible-island.net/xterm/modified-keys-us-pc105.html. 545 */ 546 onlykey = key & KEYC_MASK_KEY; 547 if ((key & (KEYC_META | KEYC_CTRL)) == KEYC_CTRL && 548 (onlykey == ' ' || 549 onlykey == '/' || 550 onlykey == '@' || 551 onlykey == '^' || 552 (onlykey >= '2' && onlykey <= '8') || 553 (onlykey >= '@' && onlykey <= '~'))) 554 return (input_key_vt10x(bev, key)); 555 556 /* 557 * A regular key + Meta. In the absence of a standard to back this, we 558 * mimic what iTerm 2 does. 559 */ 560 if ((key & (KEYC_CTRL | KEYC_META)) == KEYC_META) 561 return (input_key_vt10x(bev, key)); 562 563 return (-1); 564 } 565 566 /* Translate a key code into an output key sequence. */ 567 int 568 input_key(struct screen *s, struct bufferevent *bev, key_code key) 569 { 570 struct input_key_entry *ike = NULL; 571 key_code newkey; 572 struct utf8_data ud; 573 574 /* Mouse keys need a pane. */ 575 if (KEYC_IS_MOUSE(key)) 576 return (0); 577 578 /* Literal keys go as themselves (can't be more than eight bits). */ 579 if (key & KEYC_LITERAL) { 580 ud.data[0] = (u_char)key; 581 input_key_write(__func__, bev, (const char *)ud.data, 1); 582 return (0); 583 } 584 585 /* Is this backspace? */ 586 if ((key & KEYC_MASK_KEY) == KEYC_BSPACE) { 587 newkey = options_get_number(global_options, "backspace"); 588 if (newkey >= 0x7f) 589 newkey = '\177'; 590 key = newkey|(key & (KEYC_MASK_MODIFIERS|KEYC_MASK_FLAGS)); 591 } 592 593 /* Is this backtab? */ 594 if ((key & KEYC_MASK_KEY) == KEYC_BTAB) { 595 if ((s->mode & EXTENDED_KEY_MODES) != 0) { 596 /* When in xterm extended mode, remap into S-Tab. */ 597 key = '\011' | (key & ~KEYC_MASK_KEY) | KEYC_SHIFT; 598 } else { 599 /* Otherwise clear modifiers. */ 600 key &= ~KEYC_MASK_MODIFIERS; 601 } 602 } 603 604 /* 605 * A trivial case, that is a 7-bit key, excluding C0 control characters 606 * that can't be entered from the keyboard, and no modifiers; or a UTF-8 607 * key and no modifiers. 608 */ 609 if (!(key & ~KEYC_MASK_KEY)) { 610 if (key == C0_HT || 611 key == C0_CR || 612 key == C0_ESC || 613 (key >= 0x20 && key <= 0x7f)) { 614 ud.data[0] = key; 615 input_key_write(__func__, bev, (const char *)&ud.data[0], 1); 616 return (0); 617 } 618 if (KEYC_IS_UNICODE(key)) { 619 utf8_to_data(key, &ud); 620 input_key_write(__func__, bev, (const char *)ud.data, ud.size); 621 return (0); 622 } 623 } 624 625 /* 626 * Look up the standard VT10x keys in the tree. If not in application 627 * keypad or cursor mode, remove the respective flags from the key. 628 */ 629 if (~s->mode & MODE_KKEYPAD) 630 key &= ~KEYC_KEYPAD; 631 if (~s->mode & MODE_KCURSOR) 632 key &= ~KEYC_CURSOR; 633 if (ike == NULL) 634 ike = input_key_get(key); 635 if (ike == NULL && (key & KEYC_META) && (~key & KEYC_IMPLIED_META)) 636 ike = input_key_get(key & ~KEYC_META); 637 if (ike == NULL && (key & KEYC_CURSOR)) 638 ike = input_key_get(key & ~KEYC_CURSOR); 639 if (ike == NULL && (key & KEYC_KEYPAD)) 640 ike = input_key_get(key & ~KEYC_KEYPAD); 641 if (ike != NULL) { 642 log_debug("%s: found key 0x%llx: \"%s\"", __func__, key, 643 ike->data); 644 if ((key == KEYC_PASTE_START || key == KEYC_PASTE_END) && 645 (~s->mode & MODE_BRACKETPASTE)) 646 return (0); 647 if ((key & KEYC_META) && (~key & KEYC_IMPLIED_META)) 648 input_key_write(__func__, bev, "\033", 1); 649 input_key_write(__func__, bev, ike->data, strlen(ike->data)); 650 return (0); 651 } 652 653 /* Ignore internal function key codes. */ 654 if ((key >= KEYC_BASE && key < KEYC_BASE_END) || 655 (key >= KEYC_USER && key < KEYC_USER_END)) { 656 log_debug("%s: ignoring key 0x%llx", __func__, key); 657 return (0); 658 } 659 660 /* 661 * No builtin key sequence; construct an extended key sequence 662 * depending on the client mode. 663 * 664 * If something invalid reaches here, an invalid output may be 665 * produced. For example Ctrl-Shift-2 is invalid (as there's 666 * no way to enter it). The correct form is Ctrl-Shift-@, at 667 * least in US English keyboard layout. 668 */ 669 switch (s->mode & EXTENDED_KEY_MODES) { 670 case MODE_KEYS_EXTENDED_2: 671 /* 672 * The simplest mode to handle - *all* modified keys are 673 * reported in the extended form. 674 */ 675 return (input_key_extended(bev, key)); 676 case MODE_KEYS_EXTENDED: 677 /* 678 * Some keys are still reported in standard mode, to maintain 679 * compatibility with applications unaware of extended keys. 680 */ 681 if (input_key_mode1(bev, key) == -1) 682 return (input_key_extended(bev, key)); 683 return (0); 684 default: 685 /* The standard mode. */ 686 return (input_key_vt10x(bev, key)); 687 } 688 } 689 690 /* Get mouse event string. */ 691 int 692 input_key_get_mouse(struct screen *s, struct mouse_event *m, u_int x, u_int y, 693 const char **rbuf, size_t *rlen) 694 { 695 static char buf[40]; 696 size_t len; 697 698 *rbuf = NULL; 699 *rlen = 0; 700 701 /* If this pane is not in button or all mode, discard motion events. */ 702 if (MOUSE_DRAG(m->b) && (s->mode & MOTION_MOUSE_MODES) == 0) 703 return (0); 704 if ((s->mode & ALL_MOUSE_MODES) == 0) 705 return (0); 706 707 /* 708 * If this event is a release event and not in all mode, discard it. 709 * In SGR mode we can tell absolutely because a release is normally 710 * shown by the last character. Without SGR, we check if the last 711 * buttons was also a release. 712 */ 713 if (m->sgr_type != ' ') { 714 if (MOUSE_DRAG(m->sgr_b) && 715 MOUSE_RELEASE(m->sgr_b) && 716 (~s->mode & MODE_MOUSE_ALL)) 717 return (0); 718 } else { 719 if (MOUSE_DRAG(m->b) && 720 MOUSE_RELEASE(m->b) && 721 MOUSE_RELEASE(m->lb) && 722 (~s->mode & MODE_MOUSE_ALL)) 723 return (0); 724 } 725 726 /* 727 * Use the SGR (1006) extension only if the application requested it 728 * and the underlying terminal also sent the event in this format (this 729 * is because an old style mouse release event cannot be converted into 730 * the new SGR format, since the released button is unknown). Otherwise 731 * pretend that tmux doesn't speak this extension, and fall back to the 732 * UTF-8 (1005) extension if the application requested, or to the 733 * legacy format. 734 */ 735 if (m->sgr_type != ' ' && (s->mode & MODE_MOUSE_SGR)) { 736 len = xsnprintf(buf, sizeof buf, "\033[<%u;%u;%u%c", 737 m->sgr_b, x + 1, y + 1, m->sgr_type); 738 } else if (s->mode & MODE_MOUSE_UTF8) { 739 if (m->b > MOUSE_PARAM_UTF8_MAX - MOUSE_PARAM_BTN_OFF || 740 x > MOUSE_PARAM_UTF8_MAX - MOUSE_PARAM_POS_OFF || 741 y > MOUSE_PARAM_UTF8_MAX - MOUSE_PARAM_POS_OFF) 742 return (0); 743 len = xsnprintf(buf, sizeof buf, "\033[M"); 744 len += input_key_split2(m->b + MOUSE_PARAM_BTN_OFF, &buf[len]); 745 len += input_key_split2(x + MOUSE_PARAM_POS_OFF, &buf[len]); 746 len += input_key_split2(y + MOUSE_PARAM_POS_OFF, &buf[len]); 747 } else { 748 if (m->b + MOUSE_PARAM_BTN_OFF > MOUSE_PARAM_MAX) 749 return (0); 750 751 len = xsnprintf(buf, sizeof buf, "\033[M"); 752 buf[len++] = m->b + MOUSE_PARAM_BTN_OFF; 753 754 /* 755 * The incoming x and y may be out of the range which can be 756 * supported by the "normal" mouse protocol. Clamp the 757 * coordinates to the supported range. 758 */ 759 if (x + MOUSE_PARAM_POS_OFF > MOUSE_PARAM_MAX) 760 buf[len++] = MOUSE_PARAM_MAX; 761 else 762 buf[len++] = x + MOUSE_PARAM_POS_OFF; 763 if (y + MOUSE_PARAM_POS_OFF > MOUSE_PARAM_MAX) 764 buf[len++] = MOUSE_PARAM_MAX; 765 else 766 buf[len++] = y + MOUSE_PARAM_POS_OFF; 767 } 768 769 *rbuf = buf; 770 *rlen = len; 771 return (1); 772 } 773 774 /* Translate mouse and output. */ 775 static void 776 input_key_mouse(struct window_pane *wp, struct mouse_event *m) 777 { 778 struct screen *s = wp->screen; 779 u_int x, y; 780 const char *buf; 781 size_t len; 782 783 /* Ignore events if no mouse mode or the pane is not visible. */ 784 if (m->ignore || (s->mode & ALL_MOUSE_MODES) == 0) 785 return; 786 if (cmd_mouse_at(wp, m, &x, &y, 0) != 0) 787 return; 788 if (!window_pane_visible(wp)) 789 return; 790 if (!input_key_get_mouse(s, m, x, y, &buf, &len)) 791 return; 792 log_debug("writing mouse %.*s to %%%u", (int)len, buf, wp->id); 793 input_key_write(__func__, wp->event, buf, len); 794 } 795