input.c revision 1.111
1/* $OpenBSD: input.c,v 1.111 2017/02/06 19:26:49 nicm Exp $ */ 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 <netinet/in.h> 22 23#include <resolv.h> 24#include <stdlib.h> 25#include <string.h> 26#include <time.h> 27 28#include "tmux.h" 29 30/* 31 * Based on the description by Paul Williams at: 32 * 33 * http://vt100.net/emu/dec_ansi_parser 34 * 35 * With the following changes: 36 * 37 * - 7-bit only. 38 * 39 * - Support for UTF-8. 40 * 41 * - OSC (but not APC) may be terminated by \007 as well as ST. 42 * 43 * - A state for APC similar to OSC. Some terminals appear to use this to set 44 * the title. 45 * 46 * - A state for the screen \033k...\033\\ sequence to rename a window. This is 47 * pretty stupid but not supporting it is more trouble than it is worth. 48 * 49 * - Special handling for ESC inside a DCS to allow arbitrary byte sequences to 50 * be passed to the underlying terminals. 51 */ 52 53/* Input parser cell. */ 54struct input_cell { 55 struct grid_cell cell; 56 int set; 57 int g0set; /* 1 if ACS */ 58 int g1set; /* 1 if ACS */ 59}; 60 61/* Input parser context. */ 62struct input_ctx { 63 struct window_pane *wp; 64 struct screen_write_ctx ctx; 65 66 struct input_cell cell; 67 68 struct input_cell old_cell; 69 u_int old_cx; 70 u_int old_cy; 71 72 u_char interm_buf[4]; 73 size_t interm_len; 74 75 u_char param_buf[64]; 76 size_t param_len; 77 78#define INPUT_BUF_START 32 79#define INPUT_BUF_LIMIT 1048576 80 u_char *input_buf; 81 size_t input_len; 82 size_t input_space; 83 84 int param_list[24]; /* -1 not present */ 85 u_int param_list_len; 86 87 struct utf8_data utf8data; 88 89 int ch; 90 int flags; 91#define INPUT_DISCARD 0x1 92 93 const struct input_state *state; 94 95 /* 96 * All input received since we were last in the ground state. Sent to 97 * control clients on connection. 98 */ 99 struct evbuffer *since_ground; 100}; 101 102/* Helper functions. */ 103struct input_transition; 104static int input_split(struct input_ctx *); 105static int input_get(struct input_ctx *, u_int, int, int); 106static void printflike(2, 3) input_reply(struct input_ctx *, const char *, ...); 107static void input_set_state(struct window_pane *, 108 const struct input_transition *); 109static void input_reset_cell(struct input_ctx *); 110 111static void input_osc_4(struct window_pane *, const char *); 112static void input_osc_52(struct window_pane *, const char *); 113static void input_osc_104(struct window_pane *, const char *); 114 115/* Transition entry/exit handlers. */ 116static void input_clear(struct input_ctx *); 117static void input_ground(struct input_ctx *); 118static void input_enter_osc(struct input_ctx *); 119static void input_exit_osc(struct input_ctx *); 120static void input_enter_apc(struct input_ctx *); 121static void input_exit_apc(struct input_ctx *); 122static void input_enter_rename(struct input_ctx *); 123static void input_exit_rename(struct input_ctx *); 124 125/* Input state handlers. */ 126static int input_print(struct input_ctx *); 127static int input_intermediate(struct input_ctx *); 128static int input_parameter(struct input_ctx *); 129static int input_input(struct input_ctx *); 130static int input_c0_dispatch(struct input_ctx *); 131static int input_esc_dispatch(struct input_ctx *); 132static int input_csi_dispatch(struct input_ctx *); 133static void input_csi_dispatch_rm(struct input_ctx *); 134static void input_csi_dispatch_rm_private(struct input_ctx *); 135static void input_csi_dispatch_sm(struct input_ctx *); 136static void input_csi_dispatch_sm_private(struct input_ctx *); 137static void input_csi_dispatch_winops(struct input_ctx *); 138static void input_csi_dispatch_sgr_256(struct input_ctx *, int, u_int *); 139static void input_csi_dispatch_sgr_rgb(struct input_ctx *, int, u_int *); 140static void input_csi_dispatch_sgr(struct input_ctx *); 141static int input_dcs_dispatch(struct input_ctx *); 142static int input_utf8_open(struct input_ctx *); 143static int input_utf8_add(struct input_ctx *); 144static int input_utf8_close(struct input_ctx *); 145 146/* Command table comparison function. */ 147static int input_table_compare(const void *, const void *); 148 149/* Command table entry. */ 150struct input_table_entry { 151 int ch; 152 const char *interm; 153 int type; 154}; 155 156/* Escape commands. */ 157enum input_esc_type { 158 INPUT_ESC_DECALN, 159 INPUT_ESC_DECKPAM, 160 INPUT_ESC_DECKPNM, 161 INPUT_ESC_DECRC, 162 INPUT_ESC_DECSC, 163 INPUT_ESC_HTS, 164 INPUT_ESC_IND, 165 INPUT_ESC_NEL, 166 INPUT_ESC_RI, 167 INPUT_ESC_RIS, 168 INPUT_ESC_SCSG0_OFF, 169 INPUT_ESC_SCSG0_ON, 170 INPUT_ESC_SCSG1_OFF, 171 INPUT_ESC_SCSG1_ON, 172 INPUT_ESC_ST, 173}; 174 175/* Escape command table. */ 176static const struct input_table_entry input_esc_table[] = { 177 { '0', "(", INPUT_ESC_SCSG0_ON }, 178 { '0', ")", INPUT_ESC_SCSG1_ON }, 179 { '7', "", INPUT_ESC_DECSC }, 180 { '8', "", INPUT_ESC_DECRC }, 181 { '8', "#", INPUT_ESC_DECALN }, 182 { '=', "", INPUT_ESC_DECKPAM }, 183 { '>', "", INPUT_ESC_DECKPNM }, 184 { 'B', "(", INPUT_ESC_SCSG0_OFF }, 185 { 'B', ")", INPUT_ESC_SCSG1_OFF }, 186 { 'D', "", INPUT_ESC_IND }, 187 { 'E', "", INPUT_ESC_NEL }, 188 { 'H', "", INPUT_ESC_HTS }, 189 { 'M', "", INPUT_ESC_RI }, 190 { '\\', "", INPUT_ESC_ST }, 191 { 'c', "", INPUT_ESC_RIS }, 192}; 193 194/* Control (CSI) commands. */ 195enum input_csi_type { 196 INPUT_CSI_CBT, 197 INPUT_CSI_CNL, 198 INPUT_CSI_CPL, 199 INPUT_CSI_CUB, 200 INPUT_CSI_CUD, 201 INPUT_CSI_CUF, 202 INPUT_CSI_CUP, 203 INPUT_CSI_CUU, 204 INPUT_CSI_DA, 205 INPUT_CSI_DA_TWO, 206 INPUT_CSI_DCH, 207 INPUT_CSI_DECSCUSR, 208 INPUT_CSI_DECSTBM, 209 INPUT_CSI_DL, 210 INPUT_CSI_DSR, 211 INPUT_CSI_ECH, 212 INPUT_CSI_ED, 213 INPUT_CSI_EL, 214 INPUT_CSI_HPA, 215 INPUT_CSI_ICH, 216 INPUT_CSI_IL, 217 INPUT_CSI_RCP, 218 INPUT_CSI_RM, 219 INPUT_CSI_RM_PRIVATE, 220 INPUT_CSI_SCP, 221 INPUT_CSI_SGR, 222 INPUT_CSI_SM, 223 INPUT_CSI_SM_PRIVATE, 224 INPUT_CSI_TBC, 225 INPUT_CSI_VPA, 226 INPUT_CSI_WINOPS, 227}; 228 229/* Control (CSI) command table. */ 230static const struct input_table_entry input_csi_table[] = { 231 { '@', "", INPUT_CSI_ICH }, 232 { 'A', "", INPUT_CSI_CUU }, 233 { 'B', "", INPUT_CSI_CUD }, 234 { 'C', "", INPUT_CSI_CUF }, 235 { 'D', "", INPUT_CSI_CUB }, 236 { 'E', "", INPUT_CSI_CNL }, 237 { 'F', "", INPUT_CSI_CPL }, 238 { 'G', "", INPUT_CSI_HPA }, 239 { 'H', "", INPUT_CSI_CUP }, 240 { 'J', "", INPUT_CSI_ED }, 241 { 'K', "", INPUT_CSI_EL }, 242 { 'L', "", INPUT_CSI_IL }, 243 { 'M', "", INPUT_CSI_DL }, 244 { 'P', "", INPUT_CSI_DCH }, 245 { 'X', "", INPUT_CSI_ECH }, 246 { 'Z', "", INPUT_CSI_CBT }, 247 { 'c', "", INPUT_CSI_DA }, 248 { 'c', ">", INPUT_CSI_DA_TWO }, 249 { 'd', "", INPUT_CSI_VPA }, 250 { 'f', "", INPUT_CSI_CUP }, 251 { 'g', "", INPUT_CSI_TBC }, 252 { 'h', "", INPUT_CSI_SM }, 253 { 'h', "?", INPUT_CSI_SM_PRIVATE }, 254 { 'l', "", INPUT_CSI_RM }, 255 { 'l', "?", INPUT_CSI_RM_PRIVATE }, 256 { 'm', "", INPUT_CSI_SGR }, 257 { 'n', "", INPUT_CSI_DSR }, 258 { 'q', " ", INPUT_CSI_DECSCUSR }, 259 { 'r', "", INPUT_CSI_DECSTBM }, 260 { 's', "", INPUT_CSI_SCP }, 261 { 't', "", INPUT_CSI_WINOPS }, 262 { 'u', "", INPUT_CSI_RCP }, 263}; 264 265/* Input transition. */ 266struct input_transition { 267 int first; 268 int last; 269 270 int (*handler)(struct input_ctx *); 271 const struct input_state *state; 272}; 273 274/* Input state. */ 275struct input_state { 276 const char *name; 277 void (*enter)(struct input_ctx *); 278 void (*exit)(struct input_ctx *); 279 const struct input_transition *transitions; 280}; 281 282/* State transitions available from all states. */ 283#define INPUT_STATE_ANYWHERE \ 284 { 0x18, 0x18, input_c0_dispatch, &input_state_ground }, \ 285 { 0x1a, 0x1a, input_c0_dispatch, &input_state_ground }, \ 286 { 0x1b, 0x1b, NULL, &input_state_esc_enter } 287 288/* Forward declarations of state tables. */ 289static const struct input_transition input_state_ground_table[]; 290static const struct input_transition input_state_esc_enter_table[]; 291static const struct input_transition input_state_esc_intermediate_table[]; 292static const struct input_transition input_state_csi_enter_table[]; 293static const struct input_transition input_state_csi_parameter_table[]; 294static const struct input_transition input_state_csi_intermediate_table[]; 295static const struct input_transition input_state_csi_ignore_table[]; 296static const struct input_transition input_state_dcs_enter_table[]; 297static const struct input_transition input_state_dcs_parameter_table[]; 298static const struct input_transition input_state_dcs_intermediate_table[]; 299static const struct input_transition input_state_dcs_handler_table[]; 300static const struct input_transition input_state_dcs_escape_table[]; 301static const struct input_transition input_state_dcs_ignore_table[]; 302static const struct input_transition input_state_osc_string_table[]; 303static const struct input_transition input_state_apc_string_table[]; 304static const struct input_transition input_state_rename_string_table[]; 305static const struct input_transition input_state_consume_st_table[]; 306static const struct input_transition input_state_utf8_three_table[]; 307static const struct input_transition input_state_utf8_two_table[]; 308static const struct input_transition input_state_utf8_one_table[]; 309 310/* ground state definition. */ 311static const struct input_state input_state_ground = { 312 "ground", 313 input_ground, NULL, 314 input_state_ground_table 315}; 316 317/* esc_enter state definition. */ 318static const struct input_state input_state_esc_enter = { 319 "esc_enter", 320 input_clear, NULL, 321 input_state_esc_enter_table 322}; 323 324/* esc_intermediate state definition. */ 325static const struct input_state input_state_esc_intermediate = { 326 "esc_intermediate", 327 NULL, NULL, 328 input_state_esc_intermediate_table 329}; 330 331/* csi_enter state definition. */ 332static const struct input_state input_state_csi_enter = { 333 "csi_enter", 334 input_clear, NULL, 335 input_state_csi_enter_table 336}; 337 338/* csi_parameter state definition. */ 339static const struct input_state input_state_csi_parameter = { 340 "csi_parameter", 341 NULL, NULL, 342 input_state_csi_parameter_table 343}; 344 345/* csi_intermediate state definition. */ 346static const struct input_state input_state_csi_intermediate = { 347 "csi_intermediate", 348 NULL, NULL, 349 input_state_csi_intermediate_table 350}; 351 352/* csi_ignore state definition. */ 353static const struct input_state input_state_csi_ignore = { 354 "csi_ignore", 355 NULL, NULL, 356 input_state_csi_ignore_table 357}; 358 359/* dcs_enter state definition. */ 360static const struct input_state input_state_dcs_enter = { 361 "dcs_enter", 362 input_clear, NULL, 363 input_state_dcs_enter_table 364}; 365 366/* dcs_parameter state definition. */ 367static const struct input_state input_state_dcs_parameter = { 368 "dcs_parameter", 369 NULL, NULL, 370 input_state_dcs_parameter_table 371}; 372 373/* dcs_intermediate state definition. */ 374static const struct input_state input_state_dcs_intermediate = { 375 "dcs_intermediate", 376 NULL, NULL, 377 input_state_dcs_intermediate_table 378}; 379 380/* dcs_handler state definition. */ 381static const struct input_state input_state_dcs_handler = { 382 "dcs_handler", 383 NULL, NULL, 384 input_state_dcs_handler_table 385}; 386 387/* dcs_escape state definition. */ 388static const struct input_state input_state_dcs_escape = { 389 "dcs_escape", 390 NULL, NULL, 391 input_state_dcs_escape_table 392}; 393 394/* dcs_ignore state definition. */ 395static const struct input_state input_state_dcs_ignore = { 396 "dcs_ignore", 397 NULL, NULL, 398 input_state_dcs_ignore_table 399}; 400 401/* osc_string state definition. */ 402static const struct input_state input_state_osc_string = { 403 "osc_string", 404 input_enter_osc, input_exit_osc, 405 input_state_osc_string_table 406}; 407 408/* apc_string state definition. */ 409static const struct input_state input_state_apc_string = { 410 "apc_string", 411 input_enter_apc, input_exit_apc, 412 input_state_apc_string_table 413}; 414 415/* rename_string state definition. */ 416static const struct input_state input_state_rename_string = { 417 "rename_string", 418 input_enter_rename, input_exit_rename, 419 input_state_rename_string_table 420}; 421 422/* consume_st state definition. */ 423static const struct input_state input_state_consume_st = { 424 "consume_st", 425 NULL, NULL, 426 input_state_consume_st_table 427}; 428 429/* utf8_three state definition. */ 430static const struct input_state input_state_utf8_three = { 431 "utf8_three", 432 NULL, NULL, 433 input_state_utf8_three_table 434}; 435 436/* utf8_two state definition. */ 437static const struct input_state input_state_utf8_two = { 438 "utf8_two", 439 NULL, NULL, 440 input_state_utf8_two_table 441}; 442 443/* utf8_one state definition. */ 444static const struct input_state input_state_utf8_one = { 445 "utf8_one", 446 NULL, NULL, 447 input_state_utf8_one_table 448}; 449 450/* ground state table. */ 451static const struct input_transition input_state_ground_table[] = { 452 INPUT_STATE_ANYWHERE, 453 454 { 0x00, 0x17, input_c0_dispatch, NULL }, 455 { 0x19, 0x19, input_c0_dispatch, NULL }, 456 { 0x1c, 0x1f, input_c0_dispatch, NULL }, 457 { 0x20, 0x7e, input_print, NULL }, 458 { 0x7f, 0x7f, NULL, NULL }, 459 { 0x80, 0xc1, NULL, NULL }, 460 { 0xc2, 0xdf, input_utf8_open, &input_state_utf8_one }, 461 { 0xe0, 0xef, input_utf8_open, &input_state_utf8_two }, 462 { 0xf0, 0xf4, input_utf8_open, &input_state_utf8_three }, 463 { 0xf5, 0xff, NULL, NULL }, 464 465 { -1, -1, NULL, NULL } 466}; 467 468/* esc_enter state table. */ 469static const struct input_transition input_state_esc_enter_table[] = { 470 INPUT_STATE_ANYWHERE, 471 472 { 0x00, 0x17, input_c0_dispatch, NULL }, 473 { 0x19, 0x19, input_c0_dispatch, NULL }, 474 { 0x1c, 0x1f, input_c0_dispatch, NULL }, 475 { 0x20, 0x2f, input_intermediate, &input_state_esc_intermediate }, 476 { 0x30, 0x4f, input_esc_dispatch, &input_state_ground }, 477 { 0x50, 0x50, NULL, &input_state_dcs_enter }, 478 { 0x51, 0x57, input_esc_dispatch, &input_state_ground }, 479 { 0x58, 0x58, NULL, &input_state_consume_st }, 480 { 0x59, 0x59, input_esc_dispatch, &input_state_ground }, 481 { 0x5a, 0x5a, input_esc_dispatch, &input_state_ground }, 482 { 0x5b, 0x5b, NULL, &input_state_csi_enter }, 483 { 0x5c, 0x5c, input_esc_dispatch, &input_state_ground }, 484 { 0x5d, 0x5d, NULL, &input_state_osc_string }, 485 { 0x5e, 0x5e, NULL, &input_state_consume_st }, 486 { 0x5f, 0x5f, NULL, &input_state_apc_string }, 487 { 0x60, 0x6a, input_esc_dispatch, &input_state_ground }, 488 { 0x6b, 0x6b, NULL, &input_state_rename_string }, 489 { 0x6c, 0x7e, input_esc_dispatch, &input_state_ground }, 490 { 0x7f, 0xff, NULL, NULL }, 491 492 { -1, -1, NULL, NULL } 493}; 494 495/* esc_interm state table. */ 496static const struct input_transition input_state_esc_intermediate_table[] = { 497 INPUT_STATE_ANYWHERE, 498 499 { 0x00, 0x17, input_c0_dispatch, NULL }, 500 { 0x19, 0x19, input_c0_dispatch, NULL }, 501 { 0x1c, 0x1f, input_c0_dispatch, NULL }, 502 { 0x20, 0x2f, input_intermediate, NULL }, 503 { 0x30, 0x7e, input_esc_dispatch, &input_state_ground }, 504 { 0x7f, 0xff, NULL, NULL }, 505 506 { -1, -1, NULL, NULL } 507}; 508 509/* csi_enter state table. */ 510static const struct input_transition input_state_csi_enter_table[] = { 511 INPUT_STATE_ANYWHERE, 512 513 { 0x00, 0x17, input_c0_dispatch, NULL }, 514 { 0x19, 0x19, input_c0_dispatch, NULL }, 515 { 0x1c, 0x1f, input_c0_dispatch, NULL }, 516 { 0x20, 0x2f, input_intermediate, &input_state_csi_intermediate }, 517 { 0x30, 0x39, input_parameter, &input_state_csi_parameter }, 518 { 0x3a, 0x3a, NULL, &input_state_csi_ignore }, 519 { 0x3b, 0x3b, input_parameter, &input_state_csi_parameter }, 520 { 0x3c, 0x3f, input_intermediate, &input_state_csi_parameter }, 521 { 0x40, 0x7e, input_csi_dispatch, &input_state_ground }, 522 { 0x7f, 0xff, NULL, NULL }, 523 524 { -1, -1, NULL, NULL } 525}; 526 527/* csi_parameter state table. */ 528static const struct input_transition input_state_csi_parameter_table[] = { 529 INPUT_STATE_ANYWHERE, 530 531 { 0x00, 0x17, input_c0_dispatch, NULL }, 532 { 0x19, 0x19, input_c0_dispatch, NULL }, 533 { 0x1c, 0x1f, input_c0_dispatch, NULL }, 534 { 0x20, 0x2f, input_intermediate, &input_state_csi_intermediate }, 535 { 0x30, 0x39, input_parameter, NULL }, 536 { 0x3a, 0x3a, NULL, &input_state_csi_ignore }, 537 { 0x3b, 0x3b, input_parameter, NULL }, 538 { 0x3c, 0x3f, NULL, &input_state_csi_ignore }, 539 { 0x40, 0x7e, input_csi_dispatch, &input_state_ground }, 540 { 0x7f, 0xff, NULL, NULL }, 541 542 { -1, -1, NULL, NULL } 543}; 544 545/* csi_intermediate state table. */ 546static const struct input_transition input_state_csi_intermediate_table[] = { 547 INPUT_STATE_ANYWHERE, 548 549 { 0x00, 0x17, input_c0_dispatch, NULL }, 550 { 0x19, 0x19, input_c0_dispatch, NULL }, 551 { 0x1c, 0x1f, input_c0_dispatch, NULL }, 552 { 0x20, 0x2f, input_intermediate, NULL }, 553 { 0x30, 0x3f, NULL, &input_state_csi_ignore }, 554 { 0x40, 0x7e, input_csi_dispatch, &input_state_ground }, 555 { 0x7f, 0xff, NULL, NULL }, 556 557 { -1, -1, NULL, NULL } 558}; 559 560/* csi_ignore state table. */ 561static const struct input_transition input_state_csi_ignore_table[] = { 562 INPUT_STATE_ANYWHERE, 563 564 { 0x00, 0x17, input_c0_dispatch, NULL }, 565 { 0x19, 0x19, input_c0_dispatch, NULL }, 566 { 0x1c, 0x1f, input_c0_dispatch, NULL }, 567 { 0x20, 0x3f, NULL, NULL }, 568 { 0x40, 0x7e, NULL, &input_state_ground }, 569 { 0x7f, 0xff, NULL, NULL }, 570 571 { -1, -1, NULL, NULL } 572}; 573 574/* dcs_enter state table. */ 575static const struct input_transition input_state_dcs_enter_table[] = { 576 INPUT_STATE_ANYWHERE, 577 578 { 0x00, 0x17, NULL, NULL }, 579 { 0x19, 0x19, NULL, NULL }, 580 { 0x1c, 0x1f, NULL, NULL }, 581 { 0x20, 0x2f, input_intermediate, &input_state_dcs_intermediate }, 582 { 0x30, 0x39, input_parameter, &input_state_dcs_parameter }, 583 { 0x3a, 0x3a, NULL, &input_state_dcs_ignore }, 584 { 0x3b, 0x3b, input_parameter, &input_state_dcs_parameter }, 585 { 0x3c, 0x3f, input_intermediate, &input_state_dcs_parameter }, 586 { 0x40, 0x7e, input_input, &input_state_dcs_handler }, 587 { 0x7f, 0xff, NULL, NULL }, 588 589 { -1, -1, NULL, NULL } 590}; 591 592/* dcs_parameter state table. */ 593static const struct input_transition input_state_dcs_parameter_table[] = { 594 INPUT_STATE_ANYWHERE, 595 596 { 0x00, 0x17, NULL, NULL }, 597 { 0x19, 0x19, NULL, NULL }, 598 { 0x1c, 0x1f, NULL, NULL }, 599 { 0x20, 0x2f, input_intermediate, &input_state_dcs_intermediate }, 600 { 0x30, 0x39, input_parameter, NULL }, 601 { 0x3a, 0x3a, NULL, &input_state_dcs_ignore }, 602 { 0x3b, 0x3b, input_parameter, NULL }, 603 { 0x3c, 0x3f, NULL, &input_state_dcs_ignore }, 604 { 0x40, 0x7e, input_input, &input_state_dcs_handler }, 605 { 0x7f, 0xff, NULL, NULL }, 606 607 { -1, -1, NULL, NULL } 608}; 609 610/* dcs_interm state table. */ 611static const struct input_transition input_state_dcs_intermediate_table[] = { 612 INPUT_STATE_ANYWHERE, 613 614 { 0x00, 0x17, NULL, NULL }, 615 { 0x19, 0x19, NULL, NULL }, 616 { 0x1c, 0x1f, NULL, NULL }, 617 { 0x20, 0x2f, input_intermediate, NULL }, 618 { 0x30, 0x3f, NULL, &input_state_dcs_ignore }, 619 { 0x40, 0x7e, input_input, &input_state_dcs_handler }, 620 { 0x7f, 0xff, NULL, NULL }, 621 622 { -1, -1, NULL, NULL } 623}; 624 625/* dcs_handler state table. */ 626static const struct input_transition input_state_dcs_handler_table[] = { 627 /* No INPUT_STATE_ANYWHERE */ 628 629 { 0x00, 0x1a, input_input, NULL }, 630 { 0x1b, 0x1b, NULL, &input_state_dcs_escape }, 631 { 0x1c, 0xff, input_input, NULL }, 632 633 { -1, -1, NULL, NULL } 634}; 635 636/* dcs_escape state table. */ 637static const struct input_transition input_state_dcs_escape_table[] = { 638 /* No INPUT_STATE_ANYWHERE */ 639 640 { 0x00, 0x5b, input_input, &input_state_dcs_handler }, 641 { 0x5c, 0x5c, input_dcs_dispatch, &input_state_ground }, 642 { 0x5d, 0xff, input_input, &input_state_dcs_handler }, 643 644 { -1, -1, NULL, NULL } 645}; 646 647/* dcs_ignore state table. */ 648static const struct input_transition input_state_dcs_ignore_table[] = { 649 INPUT_STATE_ANYWHERE, 650 651 { 0x00, 0x17, NULL, NULL }, 652 { 0x19, 0x19, NULL, NULL }, 653 { 0x1c, 0x1f, NULL, NULL }, 654 { 0x20, 0xff, NULL, NULL }, 655 656 { -1, -1, NULL, NULL } 657}; 658 659/* osc_string state table. */ 660static const struct input_transition input_state_osc_string_table[] = { 661 INPUT_STATE_ANYWHERE, 662 663 { 0x00, 0x06, NULL, NULL }, 664 { 0x07, 0x07, NULL, &input_state_ground }, 665 { 0x08, 0x17, NULL, NULL }, 666 { 0x19, 0x19, NULL, NULL }, 667 { 0x1c, 0x1f, NULL, NULL }, 668 { 0x20, 0xff, input_input, NULL }, 669 670 { -1, -1, NULL, NULL } 671}; 672 673/* apc_string state table. */ 674static const struct input_transition input_state_apc_string_table[] = { 675 INPUT_STATE_ANYWHERE, 676 677 { 0x00, 0x17, NULL, NULL }, 678 { 0x19, 0x19, NULL, NULL }, 679 { 0x1c, 0x1f, NULL, NULL }, 680 { 0x20, 0xff, input_input, NULL }, 681 682 { -1, -1, NULL, NULL } 683}; 684 685/* rename_string state table. */ 686static const struct input_transition input_state_rename_string_table[] = { 687 INPUT_STATE_ANYWHERE, 688 689 { 0x00, 0x17, NULL, NULL }, 690 { 0x19, 0x19, NULL, NULL }, 691 { 0x1c, 0x1f, NULL, NULL }, 692 { 0x20, 0xff, input_input, NULL }, 693 694 { -1, -1, NULL, NULL } 695}; 696 697/* consume_st state table. */ 698static const struct input_transition input_state_consume_st_table[] = { 699 INPUT_STATE_ANYWHERE, 700 701 { 0x00, 0x17, NULL, NULL }, 702 { 0x19, 0x19, NULL, NULL }, 703 { 0x1c, 0x1f, NULL, NULL }, 704 { 0x20, 0xff, NULL, NULL }, 705 706 { -1, -1, NULL, NULL } 707}; 708 709/* utf8_three state table. */ 710static const struct input_transition input_state_utf8_three_table[] = { 711 /* No INPUT_STATE_ANYWHERE */ 712 713 { 0x00, 0x7f, NULL, &input_state_ground }, 714 { 0x80, 0xbf, input_utf8_add, &input_state_utf8_two }, 715 { 0xc0, 0xff, NULL, &input_state_ground }, 716 717 { -1, -1, NULL, NULL } 718}; 719 720/* utf8_two state table. */ 721static const struct input_transition input_state_utf8_two_table[] = { 722 /* No INPUT_STATE_ANYWHERE */ 723 724 { 0x00, 0x7f, NULL, &input_state_ground }, 725 { 0x80, 0xbf, input_utf8_add, &input_state_utf8_one }, 726 { 0xc0, 0xff, NULL, &input_state_ground }, 727 728 { -1, -1, NULL, NULL } 729}; 730 731/* utf8_one state table. */ 732static const struct input_transition input_state_utf8_one_table[] = { 733 /* No INPUT_STATE_ANYWHERE */ 734 735 { 0x00, 0x7f, NULL, &input_state_ground }, 736 { 0x80, 0xbf, input_utf8_close, &input_state_ground }, 737 { 0xc0, 0xff, NULL, &input_state_ground }, 738 739 { -1, -1, NULL, NULL } 740}; 741 742/* Input table compare. */ 743static int 744input_table_compare(const void *key, const void *value) 745{ 746 const struct input_ctx *ictx = key; 747 const struct input_table_entry *entry = value; 748 749 if (ictx->ch != entry->ch) 750 return (ictx->ch - entry->ch); 751 return (strcmp(ictx->interm_buf, entry->interm)); 752} 753 754/* Reset cell state to default. */ 755static void 756input_reset_cell(struct input_ctx *ictx) 757{ 758 memcpy(&ictx->cell.cell, &grid_default_cell, sizeof ictx->cell.cell); 759 ictx->cell.set = 0; 760 ictx->cell.g0set = ictx->cell.g1set = 0; 761 762 memcpy(&ictx->old_cell, &ictx->cell, sizeof ictx->old_cell); 763 ictx->old_cx = 0; 764 ictx->old_cy = 0; 765} 766 767/* Initialise input parser. */ 768void 769input_init(struct window_pane *wp) 770{ 771 struct input_ctx *ictx; 772 773 ictx = wp->ictx = xcalloc(1, sizeof *ictx); 774 775 ictx->input_space = INPUT_BUF_START; 776 ictx->input_buf = xmalloc(INPUT_BUF_START); 777 778 ictx->since_ground = evbuffer_new(); 779 780 input_reset(wp, 0); 781} 782 783/* Destroy input parser. */ 784void 785input_free(struct window_pane *wp) 786{ 787 struct input_ctx *ictx = wp->ictx; 788 789 free(ictx->input_buf); 790 evbuffer_free(ictx->since_ground); 791 792 free(ictx); 793 wp->ictx = NULL; 794} 795 796/* Reset input state and clear screen. */ 797void 798input_reset(struct window_pane *wp, int clear) 799{ 800 struct input_ctx *ictx = wp->ictx; 801 802 input_reset_cell(ictx); 803 804 if (clear) { 805 if (wp->mode == NULL) 806 screen_write_start(&ictx->ctx, wp, &wp->base); 807 else 808 screen_write_start(&ictx->ctx, NULL, &wp->base); 809 screen_write_reset(&ictx->ctx); 810 screen_write_stop(&ictx->ctx); 811 } 812 813 *ictx->interm_buf = '\0'; 814 ictx->interm_len = 0; 815 816 *ictx->param_buf = '\0'; 817 ictx->param_len = 0; 818 819 *ictx->input_buf = '\0'; 820 ictx->input_len = 0; 821 822 ictx->state = &input_state_ground; 823 ictx->flags = 0; 824} 825 826/* Return pending data. */ 827struct evbuffer * 828input_pending(struct window_pane *wp) 829{ 830 return (wp->ictx->since_ground); 831} 832 833/* Change input state. */ 834static void 835input_set_state(struct window_pane *wp, const struct input_transition *itr) 836{ 837 struct input_ctx *ictx = wp->ictx; 838 839 if (ictx->state->exit != NULL) 840 ictx->state->exit(ictx); 841 ictx->state = itr->state; 842 if (ictx->state->enter != NULL) 843 ictx->state->enter(ictx); 844} 845 846/* Parse input. */ 847void 848input_parse(struct window_pane *wp) 849{ 850 struct input_ctx *ictx = wp->ictx; 851 const struct input_transition *itr; 852 struct evbuffer *evb = wp->event->input; 853 u_char *buf; 854 size_t len, off; 855 856 if (EVBUFFER_LENGTH(evb) == 0) 857 return; 858 859 window_update_activity(wp->window); 860 wp->flags |= PANE_CHANGED; 861 862 /* 863 * Open the screen. Use NULL wp if there is a mode set as don't want to 864 * update the tty. 865 */ 866 if (wp->mode == NULL) 867 screen_write_start(&ictx->ctx, wp, &wp->base); 868 else 869 screen_write_start(&ictx->ctx, NULL, &wp->base); 870 ictx->wp = wp; 871 872 buf = EVBUFFER_DATA(evb); 873 len = EVBUFFER_LENGTH(evb); 874 off = 0; 875 876 notify_input(wp, evb); 877 878 log_debug("%s: %%%u %s, %zu bytes: %.*s", __func__, wp->id, 879 ictx->state->name, len, (int)len, buf); 880 881 /* Parse the input. */ 882 while (off < len) { 883 ictx->ch = buf[off++]; 884 885 /* Find the transition. */ 886 itr = ictx->state->transitions; 887 while (itr->first != -1 && itr->last != -1) { 888 if (ictx->ch >= itr->first && ictx->ch <= itr->last) 889 break; 890 itr++; 891 } 892 if (itr->first == -1 || itr->last == -1) { 893 /* No transition? Eh? */ 894 fatalx("no transition from state"); 895 } 896 897 /* 898 * Execute the handler, if any. Don't switch state if it 899 * returns non-zero. 900 */ 901 if (itr->handler != NULL && itr->handler(ictx) != 0) 902 continue; 903 904 /* And switch state, if necessary. */ 905 if (itr->state != NULL) 906 input_set_state(wp, itr); 907 908 /* If not in ground state, save input. */ 909 if (ictx->state != &input_state_ground) 910 evbuffer_add(ictx->since_ground, &ictx->ch, 1); 911 } 912 913 /* Close the screen. */ 914 screen_write_stop(&ictx->ctx); 915 916 evbuffer_drain(evb, len); 917} 918 919/* Split the parameter list (if any). */ 920static int 921input_split(struct input_ctx *ictx) 922 923{ 924 const char *errstr; 925 char *ptr, *out; 926 int n; 927 928 ictx->param_list_len = 0; 929 if (ictx->param_len == 0) 930 return (0); 931 932 ptr = ictx->param_buf; 933 while ((out = strsep(&ptr, ";")) != NULL) { 934 if (*out == '\0') 935 n = -1; 936 else { 937 n = strtonum(out, 0, INT_MAX, &errstr); 938 if (errstr != NULL) 939 return (-1); 940 } 941 942 ictx->param_list[ictx->param_list_len++] = n; 943 if (ictx->param_list_len == nitems(ictx->param_list)) 944 return (-1); 945 } 946 947 return (0); 948} 949 950/* Get an argument or return default value. */ 951static int 952input_get(struct input_ctx *ictx, u_int validx, int minval, int defval) 953{ 954 int retval; 955 956 if (validx >= ictx->param_list_len) 957 return (defval); 958 959 retval = ictx->param_list[validx]; 960 if (retval == -1) 961 return (defval); 962 if (retval < minval) 963 return (minval); 964 return (retval); 965} 966 967/* Reply to terminal query. */ 968static void 969input_reply(struct input_ctx *ictx, const char *fmt, ...) 970{ 971 va_list ap; 972 char *reply; 973 974 va_start(ap, fmt); 975 xvasprintf(&reply, fmt, ap); 976 va_end(ap); 977 978 bufferevent_write(ictx->wp->event, reply, strlen(reply)); 979 free(reply); 980} 981 982/* Clear saved state. */ 983static void 984input_clear(struct input_ctx *ictx) 985{ 986 *ictx->interm_buf = '\0'; 987 ictx->interm_len = 0; 988 989 *ictx->param_buf = '\0'; 990 ictx->param_len = 0; 991 992 *ictx->input_buf = '\0'; 993 ictx->input_len = 0; 994 995 ictx->flags &= ~INPUT_DISCARD; 996} 997 998/* Reset for ground state. */ 999static void 1000input_ground(struct input_ctx *ictx) 1001{ 1002 evbuffer_drain(ictx->since_ground, EVBUFFER_LENGTH(ictx->since_ground)); 1003 1004 if (ictx->input_space > INPUT_BUF_START) { 1005 ictx->input_space = INPUT_BUF_START; 1006 ictx->input_buf = xrealloc(ictx->input_buf, INPUT_BUF_START); 1007 } 1008} 1009 1010/* Output this character to the screen. */ 1011static int 1012input_print(struct input_ctx *ictx) 1013{ 1014 int set; 1015 1016 set = ictx->cell.set == 0 ? ictx->cell.g0set : ictx->cell.g1set; 1017 if (set == 1) 1018 ictx->cell.cell.attr |= GRID_ATTR_CHARSET; 1019 else 1020 ictx->cell.cell.attr &= ~GRID_ATTR_CHARSET; 1021 1022 utf8_set(&ictx->cell.cell.data, ictx->ch); 1023 screen_write_cell(&ictx->ctx, &ictx->cell.cell); 1024 1025 ictx->cell.cell.attr &= ~GRID_ATTR_CHARSET; 1026 1027 return (0); 1028} 1029 1030/* Collect intermediate string. */ 1031static int 1032input_intermediate(struct input_ctx *ictx) 1033{ 1034 if (ictx->interm_len == (sizeof ictx->interm_buf) - 1) 1035 ictx->flags |= INPUT_DISCARD; 1036 else { 1037 ictx->interm_buf[ictx->interm_len++] = ictx->ch; 1038 ictx->interm_buf[ictx->interm_len] = '\0'; 1039 } 1040 1041 return (0); 1042} 1043 1044/* Collect parameter string. */ 1045static int 1046input_parameter(struct input_ctx *ictx) 1047{ 1048 if (ictx->param_len == (sizeof ictx->param_buf) - 1) 1049 ictx->flags |= INPUT_DISCARD; 1050 else { 1051 ictx->param_buf[ictx->param_len++] = ictx->ch; 1052 ictx->param_buf[ictx->param_len] = '\0'; 1053 } 1054 1055 return (0); 1056} 1057 1058/* Collect input string. */ 1059static int 1060input_input(struct input_ctx *ictx) 1061{ 1062 size_t available; 1063 1064 available = ictx->input_space; 1065 while (ictx->input_len + 1 >= available) { 1066 available *= 2; 1067 if (available > INPUT_BUF_LIMIT) { 1068 ictx->flags |= INPUT_DISCARD; 1069 return (0); 1070 } 1071 ictx->input_buf = xrealloc(ictx->input_buf, available); 1072 ictx->input_space = available; 1073 } 1074 ictx->input_buf[ictx->input_len++] = ictx->ch; 1075 ictx->input_buf[ictx->input_len] = '\0'; 1076 1077 return (0); 1078} 1079 1080/* Execute C0 control sequence. */ 1081static int 1082input_c0_dispatch(struct input_ctx *ictx) 1083{ 1084 struct screen_write_ctx *sctx = &ictx->ctx; 1085 struct window_pane *wp = ictx->wp; 1086 struct screen *s = sctx->s; 1087 1088 log_debug("%s: '%c'", __func__, ictx->ch); 1089 1090 switch (ictx->ch) { 1091 case '\000': /* NUL */ 1092 break; 1093 case '\007': /* BEL */ 1094 alerts_queue(wp->window, WINDOW_BELL); 1095 break; 1096 case '\010': /* BS */ 1097 screen_write_backspace(sctx); 1098 break; 1099 case '\011': /* HT */ 1100 /* Don't tab beyond the end of the line. */ 1101 if (s->cx >= screen_size_x(s) - 1) 1102 break; 1103 1104 /* Find the next tab point, or use the last column if none. */ 1105 do { 1106 s->cx++; 1107 if (bit_test(s->tabs, s->cx)) 1108 break; 1109 } while (s->cx < screen_size_x(s) - 1); 1110 break; 1111 case '\012': /* LF */ 1112 case '\013': /* VT */ 1113 case '\014': /* FF */ 1114 screen_write_linefeed(sctx, 0); 1115 break; 1116 case '\015': /* CR */ 1117 screen_write_carriagereturn(sctx); 1118 break; 1119 case '\016': /* SO */ 1120 ictx->cell.set = 1; 1121 break; 1122 case '\017': /* SI */ 1123 ictx->cell.set = 0; 1124 break; 1125 default: 1126 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1127 break; 1128 } 1129 1130 return (0); 1131} 1132 1133/* Execute escape sequence. */ 1134static int 1135input_esc_dispatch(struct input_ctx *ictx) 1136{ 1137 struct screen_write_ctx *sctx = &ictx->ctx; 1138 struct screen *s = sctx->s; 1139 struct input_table_entry *entry; 1140 1141 if (ictx->flags & INPUT_DISCARD) 1142 return (0); 1143 log_debug("%s: '%c', %s", __func__, ictx->ch, ictx->interm_buf); 1144 1145 entry = bsearch(ictx, input_esc_table, nitems(input_esc_table), 1146 sizeof input_esc_table[0], input_table_compare); 1147 if (entry == NULL) { 1148 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1149 return (0); 1150 } 1151 1152 switch (entry->type) { 1153 case INPUT_ESC_RIS: 1154 window_pane_reset_palette(ictx->wp); 1155 input_reset_cell(ictx); 1156 screen_write_reset(sctx); 1157 break; 1158 case INPUT_ESC_IND: 1159 screen_write_linefeed(sctx, 0); 1160 break; 1161 case INPUT_ESC_NEL: 1162 screen_write_carriagereturn(sctx); 1163 screen_write_linefeed(sctx, 0); 1164 break; 1165 case INPUT_ESC_HTS: 1166 if (s->cx < screen_size_x(s)) 1167 bit_set(s->tabs, s->cx); 1168 break; 1169 case INPUT_ESC_RI: 1170 screen_write_reverseindex(sctx); 1171 break; 1172 case INPUT_ESC_DECKPAM: 1173 screen_write_mode_set(sctx, MODE_KKEYPAD); 1174 break; 1175 case INPUT_ESC_DECKPNM: 1176 screen_write_mode_clear(sctx, MODE_KKEYPAD); 1177 break; 1178 case INPUT_ESC_DECSC: 1179 memcpy(&ictx->old_cell, &ictx->cell, sizeof ictx->old_cell); 1180 ictx->old_cx = s->cx; 1181 ictx->old_cy = s->cy; 1182 break; 1183 case INPUT_ESC_DECRC: 1184 memcpy(&ictx->cell, &ictx->old_cell, sizeof ictx->cell); 1185 screen_write_cursormove(sctx, ictx->old_cx, ictx->old_cy); 1186 break; 1187 case INPUT_ESC_DECALN: 1188 screen_write_alignmenttest(sctx); 1189 break; 1190 case INPUT_ESC_SCSG0_ON: 1191 ictx->cell.g0set = 1; 1192 break; 1193 case INPUT_ESC_SCSG0_OFF: 1194 ictx->cell.g0set = 0; 1195 break; 1196 case INPUT_ESC_SCSG1_ON: 1197 ictx->cell.g1set = 1; 1198 break; 1199 case INPUT_ESC_SCSG1_OFF: 1200 ictx->cell.g1set = 0; 1201 break; 1202 case INPUT_ESC_ST: 1203 /* ST terminates OSC but the state transition already did it. */ 1204 break; 1205 } 1206 1207 return (0); 1208} 1209 1210/* Execute control sequence. */ 1211static int 1212input_csi_dispatch(struct input_ctx *ictx) 1213{ 1214 struct screen_write_ctx *sctx = &ictx->ctx; 1215 struct screen *s = sctx->s; 1216 struct input_table_entry *entry; 1217 int n, m; 1218 u_int cx; 1219 1220 if (ictx->flags & INPUT_DISCARD) 1221 return (0); 1222 1223 log_debug("%s: '%c' \"%s\" \"%s\"", 1224 __func__, ictx->ch, ictx->interm_buf, ictx->param_buf); 1225 1226 if (input_split(ictx) != 0) 1227 return (0); 1228 1229 entry = bsearch(ictx, input_csi_table, nitems(input_csi_table), 1230 sizeof input_csi_table[0], input_table_compare); 1231 if (entry == NULL) { 1232 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1233 return (0); 1234 } 1235 1236 switch (entry->type) { 1237 case INPUT_CSI_CBT: 1238 /* Find the previous tab point, n times. */ 1239 cx = s->cx; 1240 if (cx > screen_size_x(s) - 1) 1241 cx = screen_size_x(s) - 1; 1242 n = input_get(ictx, 0, 1, 1); 1243 while (cx > 0 && n-- > 0) { 1244 do 1245 cx--; 1246 while (cx > 0 && !bit_test(s->tabs, cx)); 1247 } 1248 s->cx = cx; 1249 break; 1250 case INPUT_CSI_CUB: 1251 screen_write_cursorleft(sctx, input_get(ictx, 0, 1, 1)); 1252 break; 1253 case INPUT_CSI_CUD: 1254 screen_write_cursordown(sctx, input_get(ictx, 0, 1, 1)); 1255 break; 1256 case INPUT_CSI_CUF: 1257 screen_write_cursorright(sctx, input_get(ictx, 0, 1, 1)); 1258 break; 1259 case INPUT_CSI_CUP: 1260 n = input_get(ictx, 0, 1, 1); 1261 m = input_get(ictx, 1, 1, 1); 1262 screen_write_cursormove(sctx, m - 1, n - 1); 1263 break; 1264 case INPUT_CSI_WINOPS: 1265 input_csi_dispatch_winops(ictx); 1266 break; 1267 case INPUT_CSI_CUU: 1268 screen_write_cursorup(sctx, input_get(ictx, 0, 1, 1)); 1269 break; 1270 case INPUT_CSI_CNL: 1271 screen_write_carriagereturn(sctx); 1272 screen_write_cursordown(sctx, input_get(ictx, 0, 1, 1)); 1273 break; 1274 case INPUT_CSI_CPL: 1275 screen_write_carriagereturn(sctx); 1276 screen_write_cursorup(sctx, input_get(ictx, 0, 1, 1)); 1277 break; 1278 case INPUT_CSI_DA: 1279 switch (input_get(ictx, 0, 0, 0)) { 1280 case 0: 1281 input_reply(ictx, "\033[?1;2c"); 1282 break; 1283 default: 1284 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1285 break; 1286 } 1287 break; 1288 case INPUT_CSI_DA_TWO: 1289 switch (input_get(ictx, 0, 0, 0)) { 1290 case 0: 1291 input_reply(ictx, "\033[>84;0;0c"); 1292 break; 1293 default: 1294 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1295 break; 1296 } 1297 break; 1298 case INPUT_CSI_ECH: 1299 screen_write_clearcharacter(sctx, input_get(ictx, 0, 1, 1)); 1300 break; 1301 case INPUT_CSI_DCH: 1302 screen_write_deletecharacter(sctx, input_get(ictx, 0, 1, 1), 1303 ictx->cell.cell.bg); 1304 break; 1305 case INPUT_CSI_DECSTBM: 1306 n = input_get(ictx, 0, 1, 1); 1307 m = input_get(ictx, 1, 1, screen_size_y(s)); 1308 screen_write_scrollregion(sctx, n - 1, m - 1); 1309 break; 1310 case INPUT_CSI_DL: 1311 screen_write_deleteline(sctx, input_get(ictx, 0, 1, 1), 1312 ictx->cell.cell.bg); 1313 break; 1314 case INPUT_CSI_DSR: 1315 switch (input_get(ictx, 0, 0, 0)) { 1316 case 5: 1317 input_reply(ictx, "\033[0n"); 1318 break; 1319 case 6: 1320 input_reply(ictx, "\033[%u;%uR", s->cy + 1, s->cx + 1); 1321 break; 1322 default: 1323 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1324 break; 1325 } 1326 break; 1327 case INPUT_CSI_ED: 1328 switch (input_get(ictx, 0, 0, 0)) { 1329 case 0: 1330 screen_write_clearendofscreen(sctx, ictx->cell.cell.bg); 1331 break; 1332 case 1: 1333 screen_write_clearstartofscreen(sctx, ictx->cell.cell.bg); 1334 break; 1335 case 2: 1336 screen_write_clearscreen(sctx, ictx->cell.cell.bg); 1337 break; 1338 case 3: 1339 switch (input_get(ictx, 1, 0, 0)) { 1340 case 0: 1341 /* 1342 * Linux console extension to clear history 1343 * (for example before locking the screen). 1344 */ 1345 screen_write_clearhistory(sctx); 1346 break; 1347 } 1348 break; 1349 default: 1350 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1351 break; 1352 } 1353 break; 1354 case INPUT_CSI_EL: 1355 switch (input_get(ictx, 0, 0, 0)) { 1356 case 0: 1357 screen_write_clearendofline(sctx, ictx->cell.cell.bg); 1358 break; 1359 case 1: 1360 screen_write_clearstartofline(sctx, ictx->cell.cell.bg); 1361 break; 1362 case 2: 1363 screen_write_clearline(sctx, ictx->cell.cell.bg); 1364 break; 1365 default: 1366 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1367 break; 1368 } 1369 break; 1370 case INPUT_CSI_HPA: 1371 n = input_get(ictx, 0, 1, 1); 1372 screen_write_cursormove(sctx, n - 1, s->cy); 1373 break; 1374 case INPUT_CSI_ICH: 1375 screen_write_insertcharacter(sctx, input_get(ictx, 0, 1, 1), 1376 ictx->cell.cell.bg); 1377 break; 1378 case INPUT_CSI_IL: 1379 screen_write_insertline(sctx, input_get(ictx, 0, 1, 1), 1380 ictx->cell.cell.bg); 1381 break; 1382 case INPUT_CSI_RCP: 1383 memcpy(&ictx->cell, &ictx->old_cell, sizeof ictx->cell); 1384 screen_write_cursormove(sctx, ictx->old_cx, ictx->old_cy); 1385 break; 1386 case INPUT_CSI_RM: 1387 input_csi_dispatch_rm(ictx); 1388 break; 1389 case INPUT_CSI_RM_PRIVATE: 1390 input_csi_dispatch_rm_private(ictx); 1391 break; 1392 case INPUT_CSI_SCP: 1393 memcpy(&ictx->old_cell, &ictx->cell, sizeof ictx->old_cell); 1394 ictx->old_cx = s->cx; 1395 ictx->old_cy = s->cy; 1396 break; 1397 case INPUT_CSI_SGR: 1398 input_csi_dispatch_sgr(ictx); 1399 break; 1400 case INPUT_CSI_SM: 1401 input_csi_dispatch_sm(ictx); 1402 break; 1403 case INPUT_CSI_SM_PRIVATE: 1404 input_csi_dispatch_sm_private(ictx); 1405 break; 1406 case INPUT_CSI_TBC: 1407 switch (input_get(ictx, 0, 0, 0)) { 1408 case 0: 1409 if (s->cx < screen_size_x(s)) 1410 bit_clear(s->tabs, s->cx); 1411 break; 1412 case 3: 1413 bit_nclear(s->tabs, 0, screen_size_x(s) - 1); 1414 break; 1415 default: 1416 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1417 break; 1418 } 1419 break; 1420 case INPUT_CSI_VPA: 1421 n = input_get(ictx, 0, 1, 1); 1422 screen_write_cursormove(sctx, s->cx, n - 1); 1423 break; 1424 case INPUT_CSI_DECSCUSR: 1425 n = input_get(ictx, 0, 0, 0); 1426 screen_set_cursor_style(s, n); 1427 break; 1428 } 1429 1430 return (0); 1431} 1432 1433/* Handle CSI RM. */ 1434static void 1435input_csi_dispatch_rm(struct input_ctx *ictx) 1436{ 1437 u_int i; 1438 1439 for (i = 0; i < ictx->param_list_len; i++) { 1440 switch (input_get(ictx, i, 0, -1)) { 1441 case 4: /* IRM */ 1442 screen_write_mode_clear(&ictx->ctx, MODE_INSERT); 1443 break; 1444 case 34: 1445 screen_write_mode_set(&ictx->ctx, MODE_BLINKING); 1446 break; 1447 default: 1448 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1449 break; 1450 } 1451 } 1452} 1453 1454/* Handle CSI private RM. */ 1455static void 1456input_csi_dispatch_rm_private(struct input_ctx *ictx) 1457{ 1458 struct window_pane *wp = ictx->wp; 1459 u_int i; 1460 1461 for (i = 0; i < ictx->param_list_len; i++) { 1462 switch (input_get(ictx, i, 0, -1)) { 1463 case 1: /* DECCKM */ 1464 screen_write_mode_clear(&ictx->ctx, MODE_KCURSOR); 1465 break; 1466 case 3: /* DECCOLM */ 1467 screen_write_cursormove(&ictx->ctx, 0, 0); 1468 screen_write_clearscreen(&ictx->ctx, 1469 ictx->cell.cell.bg); 1470 break; 1471 case 7: /* DECAWM */ 1472 screen_write_mode_clear(&ictx->ctx, MODE_WRAP); 1473 break; 1474 case 12: 1475 screen_write_mode_clear(&ictx->ctx, MODE_BLINKING); 1476 break; 1477 case 25: /* TCEM */ 1478 screen_write_mode_clear(&ictx->ctx, MODE_CURSOR); 1479 break; 1480 case 1000: 1481 case 1001: 1482 case 1002: 1483 case 1003: 1484 screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES); 1485 break; 1486 case 1004: 1487 screen_write_mode_clear(&ictx->ctx, MODE_FOCUSON); 1488 break; 1489 case 1005: 1490 screen_write_mode_clear(&ictx->ctx, MODE_MOUSE_UTF8); 1491 break; 1492 case 1006: 1493 screen_write_mode_clear(&ictx->ctx, MODE_MOUSE_SGR); 1494 break; 1495 case 47: 1496 case 1047: 1497 window_pane_alternate_off(wp, &ictx->cell.cell, 0); 1498 break; 1499 case 1049: 1500 window_pane_alternate_off(wp, &ictx->cell.cell, 1); 1501 break; 1502 case 2004: 1503 screen_write_mode_clear(&ictx->ctx, MODE_BRACKETPASTE); 1504 break; 1505 default: 1506 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1507 break; 1508 } 1509 } 1510} 1511 1512/* Handle CSI SM. */ 1513static void 1514input_csi_dispatch_sm(struct input_ctx *ictx) 1515{ 1516 u_int i; 1517 1518 for (i = 0; i < ictx->param_list_len; i++) { 1519 switch (input_get(ictx, i, 0, -1)) { 1520 case 4: /* IRM */ 1521 screen_write_mode_set(&ictx->ctx, MODE_INSERT); 1522 break; 1523 case 34: 1524 screen_write_mode_clear(&ictx->ctx, MODE_BLINKING); 1525 break; 1526 default: 1527 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1528 break; 1529 } 1530 } 1531} 1532 1533/* Handle CSI private SM. */ 1534static void 1535input_csi_dispatch_sm_private(struct input_ctx *ictx) 1536{ 1537 struct window_pane *wp = ictx->wp; 1538 u_int i; 1539 1540 for (i = 0; i < ictx->param_list_len; i++) { 1541 switch (input_get(ictx, i, 0, -1)) { 1542 case 1: /* DECCKM */ 1543 screen_write_mode_set(&ictx->ctx, MODE_KCURSOR); 1544 break; 1545 case 3: /* DECCOLM */ 1546 screen_write_cursormove(&ictx->ctx, 0, 0); 1547 screen_write_clearscreen(&ictx->ctx, 1548 ictx->cell.cell.bg); 1549 break; 1550 case 7: /* DECAWM */ 1551 screen_write_mode_set(&ictx->ctx, MODE_WRAP); 1552 break; 1553 case 12: 1554 screen_write_mode_set(&ictx->ctx, MODE_BLINKING); 1555 break; 1556 case 25: /* TCEM */ 1557 screen_write_mode_set(&ictx->ctx, MODE_CURSOR); 1558 break; 1559 case 1000: 1560 screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES); 1561 screen_write_mode_set(&ictx->ctx, MODE_MOUSE_STANDARD); 1562 break; 1563 case 1002: 1564 screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES); 1565 screen_write_mode_set(&ictx->ctx, MODE_MOUSE_BUTTON); 1566 break; 1567 case 1003: 1568 screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES); 1569 screen_write_mode_set(&ictx->ctx, MODE_MOUSE_ALL); 1570 break; 1571 case 1004: 1572 if (ictx->ctx.s->mode & MODE_FOCUSON) 1573 break; 1574 screen_write_mode_set(&ictx->ctx, MODE_FOCUSON); 1575 wp->flags |= PANE_FOCUSPUSH; /* force update */ 1576 break; 1577 case 1005: 1578 screen_write_mode_set(&ictx->ctx, MODE_MOUSE_UTF8); 1579 break; 1580 case 1006: 1581 screen_write_mode_set(&ictx->ctx, MODE_MOUSE_SGR); 1582 break; 1583 case 47: 1584 case 1047: 1585 window_pane_alternate_on(wp, &ictx->cell.cell, 0); 1586 break; 1587 case 1049: 1588 window_pane_alternate_on(wp, &ictx->cell.cell, 1); 1589 break; 1590 case 2004: 1591 screen_write_mode_set(&ictx->ctx, MODE_BRACKETPASTE); 1592 break; 1593 default: 1594 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1595 break; 1596 } 1597 } 1598} 1599 1600/* Handle CSI window operations. */ 1601static void 1602input_csi_dispatch_winops(struct input_ctx *ictx) 1603{ 1604 struct window_pane *wp = ictx->wp; 1605 int n, m; 1606 1607 m = 0; 1608 while ((n = input_get(ictx, m, 0, -1)) != -1) { 1609 switch (n) { 1610 case 1: 1611 case 2: 1612 case 5: 1613 case 6: 1614 case 7: 1615 case 11: 1616 case 13: 1617 case 14: 1618 case 19: 1619 case 20: 1620 case 21: 1621 case 24: 1622 break; 1623 case 3: 1624 case 4: 1625 case 8: 1626 m++; 1627 if (input_get(ictx, m, 0, -1) == -1) 1628 return; 1629 /* FALLTHROUGH */ 1630 case 9: 1631 case 10: 1632 case 22: 1633 case 23: 1634 m++; 1635 if (input_get(ictx, m, 0, -1) == -1) 1636 return; 1637 break; 1638 case 18: 1639 input_reply(ictx, "\033[8;%u;%ut", wp->sy, wp->sx); 1640 break; 1641 default: 1642 log_debug("%s: unknown '%c'", __func__, ictx->ch); 1643 break; 1644 } 1645 m++; 1646 } 1647} 1648 1649/* Handle CSI SGR for 256 colours. */ 1650static void 1651input_csi_dispatch_sgr_256(struct input_ctx *ictx, int fgbg, u_int *i) 1652{ 1653 struct grid_cell *gc = &ictx->cell.cell; 1654 int c; 1655 1656 (*i)++; 1657 c = input_get(ictx, *i, 0, -1); 1658 if (c == -1) { 1659 if (fgbg == 38) 1660 gc->fg = 8; 1661 else if (fgbg == 48) 1662 gc->bg = 8; 1663 } else { 1664 if (fgbg == 38) 1665 gc->fg = c | COLOUR_FLAG_256; 1666 else if (fgbg == 48) 1667 gc->bg = c | COLOUR_FLAG_256; 1668 } 1669} 1670 1671/* Handle CSI SGR for RGB colours. */ 1672static void 1673input_csi_dispatch_sgr_rgb(struct input_ctx *ictx, int fgbg, u_int *i) 1674{ 1675 struct grid_cell *gc = &ictx->cell.cell; 1676 int r, g, b; 1677 1678 (*i)++; 1679 r = input_get(ictx, *i, 0, -1); 1680 if (r == -1 || r > 255) 1681 return; 1682 (*i)++; 1683 g = input_get(ictx, *i, 0, -1); 1684 if (g == -1 || g > 255) 1685 return; 1686 (*i)++; 1687 b = input_get(ictx, *i, 0, -1); 1688 if (b == -1 || b > 255) 1689 return; 1690 1691 if (fgbg == 38) 1692 gc->fg = colour_join_rgb(r, g, b); 1693 else if (fgbg == 48) 1694 gc->bg = colour_join_rgb(r, g, b); 1695} 1696 1697/* Handle CSI SGR. */ 1698static void 1699input_csi_dispatch_sgr(struct input_ctx *ictx) 1700{ 1701 struct grid_cell *gc = &ictx->cell.cell; 1702 u_int i; 1703 int n; 1704 1705 if (ictx->param_list_len == 0) { 1706 memcpy(gc, &grid_default_cell, sizeof *gc); 1707 return; 1708 } 1709 1710 for (i = 0; i < ictx->param_list_len; i++) { 1711 n = input_get(ictx, i, 0, 0); 1712 1713 if (n == 38 || n == 48) { 1714 i++; 1715 switch (input_get(ictx, i, 0, -1)) { 1716 case 2: 1717 input_csi_dispatch_sgr_rgb(ictx, n, &i); 1718 break; 1719 case 5: 1720 input_csi_dispatch_sgr_256(ictx, n, &i); 1721 break; 1722 } 1723 continue; 1724 } 1725 1726 switch (n) { 1727 case 0: 1728 case 10: 1729 memcpy(gc, &grid_default_cell, sizeof *gc); 1730 break; 1731 case 1: 1732 gc->attr |= GRID_ATTR_BRIGHT; 1733 break; 1734 case 2: 1735 gc->attr |= GRID_ATTR_DIM; 1736 break; 1737 case 3: 1738 gc->attr |= GRID_ATTR_ITALICS; 1739 break; 1740 case 4: 1741 gc->attr |= GRID_ATTR_UNDERSCORE; 1742 break; 1743 case 5: 1744 gc->attr |= GRID_ATTR_BLINK; 1745 break; 1746 case 7: 1747 gc->attr |= GRID_ATTR_REVERSE; 1748 break; 1749 case 8: 1750 gc->attr |= GRID_ATTR_HIDDEN; 1751 break; 1752 case 22: 1753 gc->attr &= ~(GRID_ATTR_BRIGHT|GRID_ATTR_DIM); 1754 break; 1755 case 23: 1756 gc->attr &= ~GRID_ATTR_ITALICS; 1757 break; 1758 case 24: 1759 gc->attr &= ~GRID_ATTR_UNDERSCORE; 1760 break; 1761 case 25: 1762 gc->attr &= ~GRID_ATTR_BLINK; 1763 break; 1764 case 27: 1765 gc->attr &= ~GRID_ATTR_REVERSE; 1766 break; 1767 case 30: 1768 case 31: 1769 case 32: 1770 case 33: 1771 case 34: 1772 case 35: 1773 case 36: 1774 case 37: 1775 gc->fg = n - 30; 1776 break; 1777 case 39: 1778 gc->fg = 8; 1779 break; 1780 case 40: 1781 case 41: 1782 case 42: 1783 case 43: 1784 case 44: 1785 case 45: 1786 case 46: 1787 case 47: 1788 gc->bg = n - 40; 1789 break; 1790 case 49: 1791 gc->bg = 8; 1792 break; 1793 case 90: 1794 case 91: 1795 case 92: 1796 case 93: 1797 case 94: 1798 case 95: 1799 case 96: 1800 case 97: 1801 gc->fg = n; 1802 break; 1803 case 100: 1804 case 101: 1805 case 102: 1806 case 103: 1807 case 104: 1808 case 105: 1809 case 106: 1810 case 107: 1811 gc->bg = n - 10; 1812 break; 1813 } 1814 } 1815} 1816 1817/* DCS terminator (ST) received. */ 1818static int 1819input_dcs_dispatch(struct input_ctx *ictx) 1820{ 1821 const char prefix[] = "tmux;"; 1822 const u_int prefix_len = (sizeof prefix) - 1; 1823 1824 if (ictx->flags & INPUT_DISCARD) 1825 return (0); 1826 1827 log_debug("%s: \"%s\"", __func__, ictx->input_buf); 1828 1829 /* Check for tmux prefix. */ 1830 if (ictx->input_len >= prefix_len && 1831 strncmp(ictx->input_buf, prefix, prefix_len) == 0) { 1832 screen_write_rawstring(&ictx->ctx, 1833 ictx->input_buf + prefix_len, ictx->input_len - prefix_len); 1834 } 1835 1836 return (0); 1837} 1838 1839/* OSC string started. */ 1840static void 1841input_enter_osc(struct input_ctx *ictx) 1842{ 1843 log_debug("%s", __func__); 1844 1845 input_clear(ictx); 1846} 1847 1848/* OSC terminator (ST) received. */ 1849static void 1850input_exit_osc(struct input_ctx *ictx) 1851{ 1852 u_char *p = ictx->input_buf; 1853 u_int option; 1854 1855 if (ictx->flags & INPUT_DISCARD) 1856 return; 1857 if (ictx->input_len < 1 || *p < '0' || *p > '9') 1858 return; 1859 1860 log_debug("%s: \"%s\"", __func__, p); 1861 1862 option = 0; 1863 while (*p >= '0' && *p <= '9') 1864 option = option * 10 + *p++ - '0'; 1865 if (*p == ';') 1866 p++; 1867 1868 switch (option) { 1869 case 0: 1870 case 2: 1871 screen_set_title(ictx->ctx.s, p); 1872 server_status_window(ictx->wp->window); 1873 break; 1874 case 4: 1875 input_osc_4(ictx->wp, p); 1876 break; 1877 case 52: 1878 input_osc_52(ictx->wp, p); 1879 break; 1880 case 12: 1881 if (*p != '?') /* ? is colour request */ 1882 screen_set_cursor_colour(ictx->ctx.s, p); 1883 break; 1884 case 104: 1885 input_osc_104(ictx->wp, p); 1886 break; 1887 case 112: 1888 if (*p == '\0') /* no arguments allowed */ 1889 screen_set_cursor_colour(ictx->ctx.s, ""); 1890 break; 1891 default: 1892 log_debug("%s: unknown '%u'", __func__, option); 1893 break; 1894 } 1895} 1896 1897/* APC string started. */ 1898static void 1899input_enter_apc(struct input_ctx *ictx) 1900{ 1901 log_debug("%s", __func__); 1902 1903 input_clear(ictx); 1904} 1905 1906/* APC terminator (ST) received. */ 1907static void 1908input_exit_apc(struct input_ctx *ictx) 1909{ 1910 if (ictx->flags & INPUT_DISCARD) 1911 return; 1912 log_debug("%s: \"%s\"", __func__, ictx->input_buf); 1913 1914 screen_set_title(ictx->ctx.s, ictx->input_buf); 1915 server_status_window(ictx->wp->window); 1916} 1917 1918/* Rename string started. */ 1919static void 1920input_enter_rename(struct input_ctx *ictx) 1921{ 1922 log_debug("%s", __func__); 1923 1924 input_clear(ictx); 1925} 1926 1927/* Rename terminator (ST) received. */ 1928static void 1929input_exit_rename(struct input_ctx *ictx) 1930{ 1931 if (ictx->flags & INPUT_DISCARD) 1932 return; 1933 if (!options_get_number(ictx->wp->window->options, "allow-rename")) 1934 return; 1935 log_debug("%s: \"%s\"", __func__, ictx->input_buf); 1936 1937 window_set_name(ictx->wp->window, ictx->input_buf); 1938 options_set_number(ictx->wp->window->options, "automatic-rename", 0); 1939 1940 server_status_window(ictx->wp->window); 1941} 1942 1943/* Open UTF-8 character. */ 1944static int 1945input_utf8_open(struct input_ctx *ictx) 1946{ 1947 struct utf8_data *ud = &ictx->utf8data; 1948 1949 if (utf8_open(ud, ictx->ch) != UTF8_MORE) 1950 fatalx("UTF-8 open invalid %#x", ictx->ch); 1951 1952 log_debug("%s %hhu", __func__, ud->size); 1953 1954 return (0); 1955} 1956 1957/* Append to UTF-8 character. */ 1958static int 1959input_utf8_add(struct input_ctx *ictx) 1960{ 1961 struct utf8_data *ud = &ictx->utf8data; 1962 1963 if (utf8_append(ud, ictx->ch) != UTF8_MORE) 1964 fatalx("UTF-8 add invalid %#x", ictx->ch); 1965 1966 log_debug("%s", __func__); 1967 1968 return (0); 1969} 1970 1971/* Close UTF-8 string. */ 1972static int 1973input_utf8_close(struct input_ctx *ictx) 1974{ 1975 struct utf8_data *ud = &ictx->utf8data; 1976 1977 if (utf8_append(ud, ictx->ch) != UTF8_DONE) { 1978 /* 1979 * An error here could be invalid UTF-8 or it could be a 1980 * nonprintable character for which we can't get the 1981 * width. Drop it. 1982 */ 1983 return (0); 1984 } 1985 1986 log_debug("%s %hhu '%*s' (width %hhu)", __func__, ud->size, 1987 (int)ud->size, ud->data, ud->width); 1988 1989 utf8_copy(&ictx->cell.cell.data, ud); 1990 screen_write_cell(&ictx->ctx, &ictx->cell.cell); 1991 1992 return (0); 1993} 1994 1995/* Handle the OSC 4 sequence for setting (multiple) palette entries. */ 1996static void 1997input_osc_4(struct window_pane *wp, const char *p) 1998{ 1999 char *copy, *s, *next = NULL; 2000 long idx; 2001 u_int r, g, b; 2002 2003 copy = s = xstrdup(p); 2004 while (s != NULL && *s != '\0') { 2005 idx = strtol(s, &next, 10); 2006 if (*next++ != ';') 2007 goto bad; 2008 if (idx < 0 || idx >= 0x100) 2009 goto bad; 2010 2011 s = strsep(&next, ";"); 2012 if (sscanf(s, "rgb:%2x/%2x/%2x", &r, &g, &b) != 3) { 2013 s = next; 2014 continue; 2015 } 2016 2017 window_pane_set_palette(wp, idx, colour_join_rgb(r, g, b)); 2018 s = next; 2019 } 2020 2021 free(copy); 2022 return; 2023 2024bad: 2025 log_debug("bad OSC 4: %s", p); 2026 free(copy); 2027} 2028 2029/* Handle the OSC 52 sequence for setting the clipboard. */ 2030static void 2031input_osc_52(struct window_pane *wp, const char *p) 2032{ 2033 char *end; 2034 size_t len; 2035 u_char *out; 2036 int outlen; 2037 struct screen_write_ctx ctx; 2038 2039 if ((end = strchr(p, ';')) == NULL) 2040 return; 2041 end++; 2042 if (*end == '\0') 2043 return; 2044 2045 len = (strlen(end) / 4) * 3; 2046 if (len == 0) 2047 return; 2048 2049 out = xmalloc(len); 2050 if ((outlen = b64_pton(end, out, len)) == -1) { 2051 free(out); 2052 return; 2053 } 2054 2055 if (options_get_number(global_options, "set-clipboard")) { 2056 screen_write_start(&ctx, wp, NULL); 2057 screen_write_setselection(&ctx, out, outlen); 2058 screen_write_stop(&ctx); 2059 } 2060 paste_add(out, outlen); 2061} 2062 2063/* Handle the OSC 104 sequence for unsetting (multiple) palette entries. */ 2064static void 2065input_osc_104(struct window_pane *wp, const char *p) 2066{ 2067 char *copy, *s; 2068 long idx; 2069 2070 if (*p == '\0') { 2071 window_pane_reset_palette(wp); 2072 return; 2073 } 2074 2075 copy = s = xstrdup(p); 2076 while (*s != '\0') { 2077 idx = strtol(s, &s, 10); 2078 if (*s != '\0' && *s != ';') 2079 goto bad; 2080 if (idx < 0 || idx >= 0x100) 2081 goto bad; 2082 2083 window_pane_unset_palette(wp, idx); 2084 if (*s == ';') 2085 s++; 2086 } 2087 free(copy); 2088 return; 2089 2090bad: 2091 log_debug("bad OSC 104: %s", p); 2092 free(copy); 2093} 2094