1 /* $OpenBSD: tty.c,v 1.313 2019/01/20 15:57:27 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 #include <sys/ioctl.h> 21 22 #include <netinet/in.h> 23 24 #include <curses.h> 25 #include <errno.h> 26 #include <fcntl.h> 27 #include <resolv.h> 28 #include <stdlib.h> 29 #include <string.h> 30 #include <termios.h> 31 #include <unistd.h> 32 33 #include "tmux.h" 34 35 static int tty_log_fd = -1; 36 37 static int tty_client_ready(struct client *, struct window_pane *); 38 39 static void tty_set_italics(struct tty *); 40 static int tty_try_colour(struct tty *, int, const char *); 41 static void tty_force_cursor_colour(struct tty *, const char *); 42 static void tty_cursor_pane(struct tty *, const struct tty_ctx *, u_int, 43 u_int); 44 static void tty_cursor_pane_unless_wrap(struct tty *, 45 const struct tty_ctx *, u_int, u_int); 46 static void tty_invalidate(struct tty *); 47 static void tty_colours(struct tty *, const struct grid_cell *); 48 static void tty_check_fg(struct tty *, const struct window_pane *, 49 struct grid_cell *); 50 static void tty_check_bg(struct tty *, const struct window_pane *, 51 struct grid_cell *); 52 static void tty_colours_fg(struct tty *, const struct grid_cell *); 53 static void tty_colours_bg(struct tty *, const struct grid_cell *); 54 55 static void tty_region_pane(struct tty *, const struct tty_ctx *, u_int, 56 u_int); 57 static void tty_region(struct tty *, u_int, u_int); 58 static void tty_margin_pane(struct tty *, const struct tty_ctx *); 59 static void tty_margin(struct tty *, u_int, u_int); 60 static int tty_large_region(struct tty *, const struct tty_ctx *); 61 static int tty_fake_bce(const struct tty *, const struct window_pane *, 62 u_int); 63 static void tty_redraw_region(struct tty *, const struct tty_ctx *); 64 static void tty_emulate_repeat(struct tty *, enum tty_code_code, 65 enum tty_code_code, u_int); 66 static void tty_repeat_space(struct tty *, u_int); 67 static void tty_draw_pane(struct tty *, const struct tty_ctx *, u_int); 68 static void tty_cell(struct tty *, const struct grid_cell *, 69 const struct window_pane *); 70 static void tty_default_colours(struct grid_cell *, 71 const struct window_pane *); 72 static void tty_default_attributes(struct tty *, const struct window_pane *, 73 u_int); 74 75 #define tty_use_margin(tty) \ 76 ((tty)->term_type == TTY_VT420) 77 78 #define tty_pane_full_width(tty, ctx) \ 79 ((ctx)->xoff == 0 && screen_size_x((ctx)->wp->screen) >= (tty)->sx) 80 81 #define TTY_BLOCK_INTERVAL (100000 /* 100 milliseconds */) 82 #define TTY_BLOCK_START(tty) (1 + ((tty)->sx * (tty)->sy) * 8) 83 #define TTY_BLOCK_STOP(tty) (1 + ((tty)->sx * (tty)->sy) / 8) 84 85 void 86 tty_create_log(void) 87 { 88 char name[64]; 89 90 xsnprintf(name, sizeof name, "tmux-out-%ld.log", (long)getpid()); 91 92 tty_log_fd = open(name, O_WRONLY|O_CREAT|O_TRUNC, 0644); 93 if (tty_log_fd != -1 && fcntl(tty_log_fd, F_SETFD, FD_CLOEXEC) == -1) 94 fatal("fcntl failed"); 95 } 96 97 int 98 tty_init(struct tty *tty, struct client *c, int fd, char *term) 99 { 100 if (!isatty(fd)) 101 return (-1); 102 103 memset(tty, 0, sizeof *tty); 104 105 if (term == NULL || *term == '\0') 106 tty->term_name = xstrdup("unknown"); 107 else 108 tty->term_name = xstrdup(term); 109 110 tty->fd = fd; 111 tty->client = c; 112 113 tty->cstyle = 0; 114 tty->ccolour = xstrdup(""); 115 116 tty->flags = 0; 117 118 tty->term_flags = 0; 119 tty->term_type = TTY_UNKNOWN; 120 121 return (0); 122 } 123 124 void 125 tty_resize(struct tty *tty) 126 { 127 struct client *c = tty->client; 128 struct winsize ws; 129 u_int sx, sy; 130 131 if (ioctl(tty->fd, TIOCGWINSZ, &ws) != -1) { 132 sx = ws.ws_col; 133 if (sx == 0) 134 sx = 80; 135 sy = ws.ws_row; 136 if (sy == 0) 137 sy = 24; 138 } else { 139 sx = 80; 140 sy = 24; 141 } 142 log_debug("%s: %s now %ux%u", __func__, c->name, sx, sy); 143 tty_set_size(tty, sx, sy); 144 tty_invalidate(tty); 145 } 146 147 void 148 tty_set_size(struct tty *tty, u_int sx, u_int sy) 149 { 150 tty->sx = sx; 151 tty->sy = sy; 152 } 153 154 static void 155 tty_read_callback(__unused int fd, __unused short events, void *data) 156 { 157 struct tty *tty = data; 158 struct client *c = tty->client; 159 size_t size = EVBUFFER_LENGTH(tty->in); 160 int nread; 161 162 nread = evbuffer_read(tty->in, tty->fd, -1); 163 if (nread == 0 || nread == -1) { 164 event_del(&tty->event_in); 165 server_client_lost(tty->client); 166 return; 167 } 168 log_debug("%s: read %d bytes (already %zu)", c->name, nread, size); 169 170 while (tty_keys_next(tty)) 171 ; 172 } 173 174 static void 175 tty_timer_callback(__unused int fd, __unused short events, void *data) 176 { 177 struct tty *tty = data; 178 struct client *c = tty->client; 179 struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL }; 180 181 log_debug("%s: %zu discarded", c->name, tty->discarded); 182 183 c->flags |= CLIENT_ALLREDRAWFLAGS; 184 c->discarded += tty->discarded; 185 186 if (tty->discarded < TTY_BLOCK_STOP(tty)) { 187 tty->flags &= ~TTY_BLOCK; 188 tty_invalidate(tty); 189 return; 190 } 191 tty->discarded = 0; 192 evtimer_add(&tty->timer, &tv); 193 } 194 195 static int 196 tty_block_maybe(struct tty *tty) 197 { 198 struct client *c = tty->client; 199 size_t size = EVBUFFER_LENGTH(tty->out); 200 struct timeval tv = { .tv_usec = TTY_BLOCK_INTERVAL }; 201 202 if (size < TTY_BLOCK_START(tty)) 203 return (0); 204 205 if (tty->flags & TTY_BLOCK) 206 return (1); 207 tty->flags |= TTY_BLOCK; 208 209 log_debug("%s: can't keep up, %zu discarded", c->name, size); 210 211 evbuffer_drain(tty->out, size); 212 c->discarded += size; 213 214 tty->discarded = 0; 215 evtimer_add(&tty->timer, &tv); 216 return (1); 217 } 218 219 static void 220 tty_write_callback(__unused int fd, __unused short events, void *data) 221 { 222 struct tty *tty = data; 223 struct client *c = tty->client; 224 size_t size = EVBUFFER_LENGTH(tty->out); 225 int nwrite; 226 227 nwrite = evbuffer_write(tty->out, tty->fd); 228 if (nwrite == -1) 229 return; 230 log_debug("%s: wrote %d bytes (of %zu)", c->name, nwrite, size); 231 232 if (c->redraw > 0) { 233 if ((size_t)nwrite >= c->redraw) 234 c->redraw = 0; 235 else 236 c->redraw -= nwrite; 237 log_debug("%s: waiting for redraw, %zu bytes left", c->name, 238 c->redraw); 239 } else if (tty_block_maybe(tty)) 240 return; 241 242 if (EVBUFFER_LENGTH(tty->out) != 0) 243 event_add(&tty->event_out, NULL); 244 } 245 246 int 247 tty_open(struct tty *tty, char **cause) 248 { 249 tty->term = tty_term_find(tty->term_name, tty->fd, cause); 250 if (tty->term == NULL) { 251 tty_close(tty); 252 return (-1); 253 } 254 tty->flags |= TTY_OPENED; 255 256 tty->flags &= ~(TTY_NOCURSOR|TTY_FREEZE|TTY_BLOCK|TTY_TIMER); 257 258 event_set(&tty->event_in, tty->fd, EV_PERSIST|EV_READ, 259 tty_read_callback, tty); 260 tty->in = evbuffer_new(); 261 if (tty->in == NULL) 262 fatal("out of memory"); 263 264 event_set(&tty->event_out, tty->fd, EV_WRITE, tty_write_callback, tty); 265 tty->out = evbuffer_new(); 266 if (tty->out == NULL) 267 fatal("out of memory"); 268 269 evtimer_set(&tty->timer, tty_timer_callback, tty); 270 271 tty_start_tty(tty); 272 273 tty_keys_build(tty); 274 275 return (0); 276 } 277 278 void 279 tty_start_tty(struct tty *tty) 280 { 281 struct client *c = tty->client; 282 struct termios tio; 283 284 if (tty->fd != -1 && tcgetattr(tty->fd, &tty->tio) == 0) { 285 setblocking(tty->fd, 0); 286 event_add(&tty->event_in, NULL); 287 288 memcpy(&tio, &tty->tio, sizeof tio); 289 tio.c_iflag &= ~(IXON|IXOFF|ICRNL|INLCR|IGNCR|IMAXBEL|ISTRIP); 290 tio.c_iflag |= IGNBRK; 291 tio.c_oflag &= ~(OPOST|ONLCR|OCRNL|ONLRET); 292 tio.c_lflag &= ~(IEXTEN|ICANON|ECHO|ECHOE|ECHONL|ECHOCTL| 293 ECHOPRT|ECHOKE|ISIG); 294 tio.c_cc[VMIN] = 1; 295 tio.c_cc[VTIME] = 0; 296 if (tcsetattr(tty->fd, TCSANOW, &tio) == 0) 297 tcflush(tty->fd, TCIOFLUSH); 298 } 299 300 tty_putcode(tty, TTYC_SMCUP); 301 302 tty_putcode(tty, TTYC_SMKX); 303 tty_putcode(tty, TTYC_CLEAR); 304 305 if (tty_acs_needed(tty)) { 306 log_debug("%s: using capabilities for ACS", c->name); 307 tty_putcode(tty, TTYC_ENACS); 308 } else 309 log_debug("%s: using UTF-8 for ACS", c->name); 310 311 tty_putcode(tty, TTYC_CNORM); 312 if (tty_term_has(tty->term, TTYC_KMOUS)) 313 tty_puts(tty, "\033[?1000l\033[?1002l\033[?1006l\033[?1005l"); 314 315 if (tty_term_flag(tty->term, TTYC_XT)) { 316 if (options_get_number(global_options, "focus-events")) { 317 tty->flags |= TTY_FOCUS; 318 tty_puts(tty, "\033[?1004h"); 319 } 320 tty_puts(tty, "\033[c"); 321 } 322 323 tty->flags |= TTY_STARTED; 324 tty_invalidate(tty); 325 326 tty_force_cursor_colour(tty, ""); 327 328 tty->mouse_drag_flag = 0; 329 tty->mouse_drag_update = NULL; 330 tty->mouse_drag_release = NULL; 331 } 332 333 void 334 tty_stop_tty(struct tty *tty) 335 { 336 struct winsize ws; 337 338 if (!(tty->flags & TTY_STARTED)) 339 return; 340 tty->flags &= ~TTY_STARTED; 341 342 event_del(&tty->timer); 343 tty->flags &= ~TTY_BLOCK; 344 345 event_del(&tty->event_in); 346 event_del(&tty->event_out); 347 348 /* 349 * Be flexible about error handling and try not kill the server just 350 * because the fd is invalid. Things like ssh -t can easily leave us 351 * with a dead tty. 352 */ 353 if (ioctl(tty->fd, TIOCGWINSZ, &ws) == -1) 354 return; 355 if (tcsetattr(tty->fd, TCSANOW, &tty->tio) == -1) 356 return; 357 358 tty_raw(tty, tty_term_string2(tty->term, TTYC_CSR, 0, ws.ws_row - 1)); 359 if (tty_acs_needed(tty)) 360 tty_raw(tty, tty_term_string(tty->term, TTYC_RMACS)); 361 tty_raw(tty, tty_term_string(tty->term, TTYC_SGR0)); 362 tty_raw(tty, tty_term_string(tty->term, TTYC_RMKX)); 363 tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR)); 364 if (tty_term_has(tty->term, TTYC_SS) && tty->cstyle != 0) { 365 if (tty_term_has(tty->term, TTYC_SE)) 366 tty_raw(tty, tty_term_string(tty->term, TTYC_SE)); 367 else 368 tty_raw(tty, tty_term_string1(tty->term, TTYC_SS, 0)); 369 } 370 if (tty->mode & MODE_BRACKETPASTE) 371 tty_raw(tty, "\033[?2004l"); 372 tty_raw(tty, tty_term_string(tty->term, TTYC_CR)); 373 374 tty_raw(tty, tty_term_string(tty->term, TTYC_CNORM)); 375 if (tty_term_has(tty->term, TTYC_KMOUS)) 376 tty_raw(tty, "\033[?1000l\033[?1002l\033[?1006l\033[?1005l"); 377 378 if (tty_term_flag(tty->term, TTYC_XT)) { 379 if (tty->flags & TTY_FOCUS) { 380 tty->flags &= ~TTY_FOCUS; 381 tty_raw(tty, "\033[?1004l"); 382 } 383 } 384 385 if (tty_use_margin(tty)) 386 tty_raw(tty, "\033[?69l"); /* DECLRMM */ 387 tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP)); 388 389 setblocking(tty->fd, 1); 390 } 391 392 void 393 tty_close(struct tty *tty) 394 { 395 if (event_initialized(&tty->key_timer)) 396 evtimer_del(&tty->key_timer); 397 tty_stop_tty(tty); 398 399 if (tty->flags & TTY_OPENED) { 400 evbuffer_free(tty->in); 401 event_del(&tty->event_in); 402 evbuffer_free(tty->out); 403 event_del(&tty->event_out); 404 405 tty_term_free(tty->term); 406 tty_keys_free(tty); 407 408 tty->flags &= ~TTY_OPENED; 409 } 410 411 if (tty->fd != -1) { 412 close(tty->fd); 413 tty->fd = -1; 414 } 415 } 416 417 void 418 tty_free(struct tty *tty) 419 { 420 tty_close(tty); 421 422 free(tty->ccolour); 423 free(tty->term_name); 424 } 425 426 void 427 tty_set_type(struct tty *tty, int type) 428 { 429 tty->term_type = type; 430 431 if (tty_use_margin(tty)) 432 tty_puts(tty, "\033[?69h"); /* DECLRMM */ 433 } 434 435 void 436 tty_raw(struct tty *tty, const char *s) 437 { 438 ssize_t n, slen; 439 u_int i; 440 441 slen = strlen(s); 442 for (i = 0; i < 5; i++) { 443 n = write(tty->fd, s, slen); 444 if (n >= 0) { 445 s += n; 446 slen -= n; 447 if (slen == 0) 448 break; 449 } else if (n == -1 && errno != EAGAIN) 450 break; 451 usleep(100); 452 } 453 } 454 455 void 456 tty_putcode(struct tty *tty, enum tty_code_code code) 457 { 458 tty_puts(tty, tty_term_string(tty->term, code)); 459 } 460 461 void 462 tty_putcode1(struct tty *tty, enum tty_code_code code, int a) 463 { 464 if (a < 0) 465 return; 466 tty_puts(tty, tty_term_string1(tty->term, code, a)); 467 } 468 469 void 470 tty_putcode2(struct tty *tty, enum tty_code_code code, int a, int b) 471 { 472 if (a < 0 || b < 0) 473 return; 474 tty_puts(tty, tty_term_string2(tty->term, code, a, b)); 475 } 476 477 void 478 tty_putcode3(struct tty *tty, enum tty_code_code code, int a, int b, int c) 479 { 480 if (a < 0 || b < 0 || c < 0) 481 return; 482 tty_puts(tty, tty_term_string3(tty->term, code, a, b, c)); 483 } 484 485 void 486 tty_putcode_ptr1(struct tty *tty, enum tty_code_code code, const void *a) 487 { 488 if (a != NULL) 489 tty_puts(tty, tty_term_ptr1(tty->term, code, a)); 490 } 491 492 void 493 tty_putcode_ptr2(struct tty *tty, enum tty_code_code code, const void *a, 494 const void *b) 495 { 496 if (a != NULL && b != NULL) 497 tty_puts(tty, tty_term_ptr2(tty->term, code, a, b)); 498 } 499 500 static void 501 tty_add(struct tty *tty, const char *buf, size_t len) 502 { 503 struct client *c = tty->client; 504 505 if (tty->flags & TTY_BLOCK) { 506 tty->discarded += len; 507 return; 508 } 509 510 evbuffer_add(tty->out, buf, len); 511 log_debug("%s: %.*s", c->name, (int)len, buf); 512 c->written += len; 513 514 if (tty_log_fd != -1) 515 write(tty_log_fd, buf, len); 516 if (tty->flags & TTY_STARTED) 517 event_add(&tty->event_out, NULL); 518 } 519 520 void 521 tty_puts(struct tty *tty, const char *s) 522 { 523 if (*s != '\0') 524 tty_add(tty, s, strlen(s)); 525 } 526 527 void 528 tty_putc(struct tty *tty, u_char ch) 529 { 530 const char *acs; 531 532 if (tty->cell.attr & GRID_ATTR_CHARSET) { 533 acs = tty_acs_get(tty, ch); 534 if (acs != NULL) 535 tty_add(tty, acs, strlen(acs)); 536 else 537 tty_add(tty, &ch, 1); 538 } else 539 tty_add(tty, &ch, 1); 540 541 if (ch >= 0x20 && ch != 0x7f) { 542 if (tty->cx >= tty->sx) { 543 tty->cx = 1; 544 if (tty->cy != tty->rlower) 545 tty->cy++; 546 547 /* 548 * On !xenl terminals, force the cursor position to 549 * where we think it should be after a line wrap - this 550 * means it works on sensible terminals as well. 551 */ 552 if (tty->term->flags & TERM_EARLYWRAP) 553 tty_putcode2(tty, TTYC_CUP, tty->cy, tty->cx); 554 } else 555 tty->cx++; 556 } 557 } 558 559 void 560 tty_putn(struct tty *tty, const void *buf, size_t len, u_int width) 561 { 562 tty_add(tty, buf, len); 563 if (tty->cx + width > tty->sx) { 564 tty->cx = (tty->cx + width) - tty->sx; 565 if (tty->cx <= tty->sx) 566 tty->cy++; 567 else 568 tty->cx = tty->cy = UINT_MAX; 569 } else 570 tty->cx += width; 571 } 572 573 static void 574 tty_set_italics(struct tty *tty) 575 { 576 const char *s; 577 578 if (tty_term_has(tty->term, TTYC_SITM)) { 579 s = options_get_string(global_options, "default-terminal"); 580 if (strcmp(s, "screen") != 0 && strncmp(s, "screen-", 7) != 0) { 581 tty_putcode(tty, TTYC_SITM); 582 return; 583 } 584 } 585 tty_putcode(tty, TTYC_SMSO); 586 } 587 588 void 589 tty_set_title(struct tty *tty, const char *title) 590 { 591 if (!tty_term_has(tty->term, TTYC_TSL) || 592 !tty_term_has(tty->term, TTYC_FSL)) 593 return; 594 595 tty_putcode(tty, TTYC_TSL); 596 tty_puts(tty, title); 597 tty_putcode(tty, TTYC_FSL); 598 } 599 600 static void 601 tty_force_cursor_colour(struct tty *tty, const char *ccolour) 602 { 603 if (*ccolour == '\0') 604 tty_putcode(tty, TTYC_CR); 605 else 606 tty_putcode_ptr1(tty, TTYC_CS, ccolour); 607 free(tty->ccolour); 608 tty->ccolour = xstrdup(ccolour); 609 } 610 611 void 612 tty_update_mode(struct tty *tty, int mode, struct screen *s) 613 { 614 int changed; 615 616 if (s != NULL && strcmp(s->ccolour, tty->ccolour) != 0) 617 tty_force_cursor_colour(tty, s->ccolour); 618 619 if (tty->flags & TTY_NOCURSOR) 620 mode &= ~MODE_CURSOR; 621 622 changed = mode ^ tty->mode; 623 if (changed & MODE_BLINKING) { 624 if (tty_term_has(tty->term, TTYC_CVVIS)) 625 tty_putcode(tty, TTYC_CVVIS); 626 else 627 tty_putcode(tty, TTYC_CNORM); 628 changed |= MODE_CURSOR; 629 } 630 if (changed & MODE_CURSOR) { 631 if (mode & MODE_CURSOR) 632 tty_putcode(tty, TTYC_CNORM); 633 else 634 tty_putcode(tty, TTYC_CIVIS); 635 } 636 if (s != NULL && tty->cstyle != s->cstyle) { 637 if (tty_term_has(tty->term, TTYC_SS)) { 638 if (s->cstyle == 0 && 639 tty_term_has(tty->term, TTYC_SE)) 640 tty_putcode(tty, TTYC_SE); 641 else 642 tty_putcode1(tty, TTYC_SS, s->cstyle); 643 } 644 tty->cstyle = s->cstyle; 645 } 646 if (changed & ALL_MOUSE_MODES) { 647 if (mode & ALL_MOUSE_MODES) { 648 /* 649 * Enable the SGR (1006) extension unconditionally, as 650 * it is safe from misinterpretation. 651 */ 652 tty_puts(tty, "\033[?1006h"); 653 if (mode & MODE_MOUSE_ALL) 654 tty_puts(tty, "\033[?1003h"); 655 else if (mode & MODE_MOUSE_BUTTON) 656 tty_puts(tty, "\033[?1002h"); 657 else if (mode & MODE_MOUSE_STANDARD) 658 tty_puts(tty, "\033[?1000h"); 659 } else { 660 if (tty->mode & MODE_MOUSE_ALL) 661 tty_puts(tty, "\033[?1003l"); 662 else if (tty->mode & MODE_MOUSE_BUTTON) 663 tty_puts(tty, "\033[?1002l"); 664 else if (tty->mode & MODE_MOUSE_STANDARD) 665 tty_puts(tty, "\033[?1000l"); 666 tty_puts(tty, "\033[?1006l"); 667 } 668 } 669 if (changed & MODE_BRACKETPASTE) { 670 if (mode & MODE_BRACKETPASTE) 671 tty_puts(tty, "\033[?2004h"); 672 else 673 tty_puts(tty, "\033[?2004l"); 674 } 675 tty->mode = mode; 676 } 677 678 static void 679 tty_emulate_repeat(struct tty *tty, enum tty_code_code code, 680 enum tty_code_code code1, u_int n) 681 { 682 if (tty_term_has(tty->term, code)) 683 tty_putcode1(tty, code, n); 684 else { 685 while (n-- > 0) 686 tty_putcode(tty, code1); 687 } 688 } 689 690 static void 691 tty_repeat_space(struct tty *tty, u_int n) 692 { 693 static char s[500]; 694 695 if (*s != ' ') 696 memset(s, ' ', sizeof s); 697 698 while (n > sizeof s) { 699 tty_putn(tty, s, sizeof s, sizeof s); 700 n -= sizeof s; 701 } 702 if (n != 0) 703 tty_putn(tty, s, n, n); 704 } 705 706 /* Is this window bigger than the terminal? */ 707 int 708 tty_window_bigger(struct tty *tty) 709 { 710 struct client *c = tty->client; 711 struct window *w = c->session->curw->window; 712 713 return (tty->sx < w->sx || tty->sy - status_line_size(c) < w->sy); 714 } 715 716 /* What offset should this window be drawn at? */ 717 int 718 tty_window_offset(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy) 719 { 720 *ox = tty->oox; 721 *oy = tty->ooy; 722 *sx = tty->osx; 723 *sy = tty->osy; 724 725 return (tty->oflag); 726 } 727 728 /* What offset should this window be drawn at? */ 729 static int 730 tty_window_offset1(struct tty *tty, u_int *ox, u_int *oy, u_int *sx, u_int *sy) 731 { 732 struct client *c = tty->client; 733 struct window *w = c->session->curw->window; 734 struct window_pane *wp = w->active; 735 u_int cx, cy, lines; 736 737 lines = status_line_size(c); 738 739 if (tty->sx >= w->sx && tty->sy - lines >= w->sy) { 740 *ox = 0; 741 *oy = 0; 742 *sx = w->sx; 743 *sy = w->sy; 744 745 c->pan_window = NULL; 746 return (0); 747 } 748 749 *sx = tty->sx; 750 *sy = tty->sy - lines; 751 752 if (c->pan_window == w) { 753 if (*sx >= w->sx) 754 c->pan_ox = 0; 755 else if (c->pan_ox + *sx > w->sx) 756 c->pan_ox = w->sx - *sx; 757 *ox = c->pan_ox; 758 if (*sy >= w->sy) 759 c->pan_oy = 0; 760 else if (c->pan_oy + *sy > w->sy) 761 c->pan_oy = w->sy - *sy; 762 *oy = c->pan_oy; 763 return (1); 764 } 765 766 if (~wp->screen->mode & MODE_CURSOR) { 767 *ox = 0; 768 *oy = 0; 769 } else { 770 cx = wp->xoff + wp->screen->cx; 771 cy = wp->yoff + wp->screen->cy; 772 773 if (cx < *sx) 774 *ox = 0; 775 else if (cx > w->sx - *sx) 776 *ox = w->sx - *sx; 777 else 778 *ox = cx - *sx / 2; 779 780 if (cy < *sy) 781 *oy = 0; 782 else if (cy > w->sy - *sy) 783 *oy = w->sy - *sy; 784 else 785 *oy = cy - *sy / 2; 786 } 787 788 c->pan_window = NULL; 789 return (1); 790 } 791 792 /* Update stored offsets for a window and redraw if necessary. */ 793 void 794 tty_update_window_offset(struct window *w) 795 { 796 struct client *c; 797 798 TAILQ_FOREACH(c, &clients, entry) { 799 if (c->session != NULL && c->session->curw->window == w) 800 tty_update_client_offset(c); 801 } 802 } 803 804 /* Update stored offsets for a client and redraw if necessary. */ 805 void 806 tty_update_client_offset(struct client *c) 807 { 808 u_int ox, oy, sx, sy; 809 810 c->tty.oflag = tty_window_offset1(&c->tty, &ox, &oy, &sx, &sy); 811 if (ox == c->tty.oox && 812 oy == c->tty.ooy && 813 sx == c->tty.osx && 814 sy == c->tty.osy) 815 return; 816 817 log_debug ("%s: %s offset has changed (%u,%u %ux%u -> %u,%u %ux%u)", 818 __func__, c->name, c->tty.oox, c->tty.ooy, c->tty.osx, c->tty.osy, 819 ox, oy, sx, sy); 820 821 c->tty.oox = ox; 822 c->tty.ooy = oy; 823 c->tty.osx = sx; 824 c->tty.osy = sy; 825 826 c->flags |= (CLIENT_REDRAWWINDOW|CLIENT_REDRAWSTATUS); 827 } 828 829 /* 830 * Is the region large enough to be worth redrawing once later rather than 831 * probably several times now? Currently yes if it is more than 50% of the 832 * pane. 833 */ 834 static int 835 tty_large_region(__unused struct tty *tty, const struct tty_ctx *ctx) 836 { 837 struct window_pane *wp = ctx->wp; 838 839 return (ctx->orlower - ctx->orupper >= screen_size_y(wp->screen) / 2); 840 } 841 842 /* 843 * Return if BCE is needed but the terminal doesn't have it - it'll need to be 844 * emulated. 845 */ 846 static int 847 tty_fake_bce(const struct tty *tty, const struct window_pane *wp, u_int bg) 848 { 849 struct grid_cell gc; 850 851 if (tty_term_flag(tty->term, TTYC_BCE)) 852 return (0); 853 854 memcpy(&gc, &grid_default_cell, sizeof gc); 855 if (wp != NULL) 856 tty_default_colours(&gc, wp); 857 858 if (!COLOUR_DEFAULT(bg) || !COLOUR_DEFAULT(gc.bg)) 859 return (1); 860 return (0); 861 } 862 863 /* 864 * Redraw scroll region using data from screen (already updated). Used when 865 * CSR not supported, or window is a pane that doesn't take up the full 866 * width of the terminal. 867 */ 868 static void 869 tty_redraw_region(struct tty *tty, const struct tty_ctx *ctx) 870 { 871 struct window_pane *wp = ctx->wp; 872 struct screen *s = wp->screen; 873 u_int i; 874 875 /* 876 * If region is large, schedule a window redraw. In most cases this is 877 * likely to be followed by some more scrolling. 878 */ 879 if (tty_large_region(tty, ctx)) { 880 wp->flags |= PANE_REDRAW; 881 return; 882 } 883 884 if (ctx->ocy < ctx->orupper || ctx->ocy > ctx->orlower) { 885 for (i = ctx->ocy; i < screen_size_y(s); i++) 886 tty_draw_pane(tty, ctx, i); 887 } else { 888 for (i = ctx->orupper; i <= ctx->orlower; i++) 889 tty_draw_pane(tty, ctx, i); 890 } 891 } 892 893 /* Is this position visible in the pane? */ 894 static int 895 tty_is_visible(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py, 896 u_int nx, u_int ny) 897 { 898 u_int xoff = ctx->xoff + px, yoff = ctx->yoff + py, lines; 899 900 if (!ctx->bigger) 901 return (1); 902 903 if (status_at_line(tty->client) == 0) 904 lines = status_line_size(tty->client); 905 else 906 lines = 0; 907 908 if (xoff + nx <= ctx->ox || xoff >= ctx->ox + ctx->sx || 909 yoff + ny <= ctx->oy || yoff >= lines + ctx->oy + ctx->sy) { 910 return (0); 911 } 912 return (1); 913 } 914 915 /* Clamp line position to visible part of pane. */ 916 static int 917 tty_clamp_line(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py, 918 u_int nx, u_int *i, u_int *x, u_int *rx, u_int *ry) 919 { 920 struct window_pane *wp = ctx->wp; 921 u_int xoff = wp->xoff + px; 922 923 if (!tty_is_visible(tty, ctx, px, py, nx, 1)) 924 return (0); 925 *ry = ctx->yoff + py - ctx->oy; 926 927 if (xoff >= ctx->ox && xoff + nx <= ctx->ox + ctx->sx) { 928 /* All visible. */ 929 *i = 0; 930 *x = ctx->xoff + px - ctx->ox; 931 *rx = nx; 932 } else if (xoff < ctx->ox && xoff + nx > ctx->ox + ctx->sx) { 933 /* Both left and right not visible. */ 934 *i = ctx->ox; 935 *x = 0; 936 *rx = ctx->sx; 937 } else if (xoff < ctx->ox) { 938 /* Left not visible. */ 939 *i = ctx->ox - (ctx->xoff + px); 940 *x = 0; 941 *rx = nx - *i; 942 } else { 943 /* Right not visible. */ 944 *i = 0; 945 *x = (ctx->xoff + px) - ctx->ox; 946 *rx = ctx->sx - *x; 947 } 948 if (*rx > nx) 949 fatalx("%s: x too big, %u > %u", __func__, *rx, nx); 950 951 return (1); 952 } 953 954 /* Clear a line. */ 955 static void 956 tty_clear_line(struct tty *tty, const struct window_pane *wp, u_int py, 957 u_int px, u_int nx, u_int bg) 958 { 959 struct client *c = tty->client; 960 961 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py); 962 963 /* Nothing to clear. */ 964 if (nx == 0) 965 return; 966 967 /* If genuine BCE is available, can try escape sequences. */ 968 if (!tty_fake_bce(tty, wp, bg)) { 969 /* Off the end of the line, use EL if available. */ 970 if (px + nx >= tty->sx && tty_term_has(tty->term, TTYC_EL)) { 971 tty_cursor(tty, px, py); 972 tty_putcode(tty, TTYC_EL); 973 return; 974 } 975 976 /* At the start of the line. Use EL1. */ 977 if (px == 0 && tty_term_has(tty->term, TTYC_EL1)) { 978 tty_cursor(tty, px + nx - 1, py); 979 tty_putcode(tty, TTYC_EL1); 980 return; 981 } 982 983 /* Section of line. Use ECH if possible. */ 984 if (tty_term_has(tty->term, TTYC_ECH)) { 985 tty_cursor(tty, px, py); 986 tty_putcode1(tty, TTYC_ECH, nx); 987 return; 988 } 989 } 990 991 /* Couldn't use an escape sequence, use spaces. */ 992 tty_cursor(tty, px, py); 993 tty_repeat_space(tty, nx); 994 } 995 996 /* Clear a line, adjusting to visible part of pane. */ 997 static void 998 tty_clear_pane_line(struct tty *tty, const struct tty_ctx *ctx, u_int py, 999 u_int px, u_int nx, u_int bg) 1000 { 1001 struct client *c = tty->client; 1002 u_int i, x, rx, ry; 1003 1004 log_debug("%s: %s, %u at %u,%u", __func__, c->name, nx, px, py); 1005 1006 if (tty_clamp_line(tty, ctx, px, py, nx, &i, &x, &rx, &ry)) 1007 tty_clear_line(tty, ctx->wp, ry, x, rx, bg); 1008 } 1009 1010 /* Clamp area position to visible part of pane. */ 1011 static int 1012 tty_clamp_area(struct tty *tty, const struct tty_ctx *ctx, u_int px, u_int py, 1013 u_int nx, u_int ny, u_int *i, u_int *j, u_int *x, u_int *y, u_int *rx, 1014 u_int *ry) 1015 { 1016 struct window_pane *wp = ctx->wp; 1017 u_int xoff = wp->xoff + px, yoff = wp->yoff + py; 1018 1019 if (!tty_is_visible(tty, ctx, px, py, nx, ny)) 1020 return (0); 1021 1022 if (xoff >= ctx->ox && xoff + nx <= ctx->ox + ctx->sx) { 1023 /* All visible. */ 1024 *i = 0; 1025 *x = ctx->xoff + px - ctx->ox; 1026 *rx = nx; 1027 } else if (xoff < ctx->ox && xoff + nx > ctx->ox + ctx->sx) { 1028 /* Both left and right not visible. */ 1029 *i = ctx->ox; 1030 *x = 0; 1031 *rx = ctx->sx; 1032 } else if (xoff < ctx->ox) { 1033 /* Left not visible. */ 1034 *i = ctx->ox - (ctx->xoff + px); 1035 *x = 0; 1036 *rx = nx - *i; 1037 } else { 1038 /* Right not visible. */ 1039 *i = 0; 1040 *x = (ctx->xoff + px) - ctx->ox; 1041 *rx = ctx->sx - *x; 1042 } 1043 if (*rx > nx) 1044 fatalx("%s: x too big, %u > %u", __func__, *rx, nx); 1045 1046 if (yoff >= ctx->oy && yoff + ny <= ctx->oy + ctx->sy) { 1047 /* All visible. */ 1048 *j = 0; 1049 *y = ctx->yoff + py - ctx->oy; 1050 *ry = ny; 1051 } else if (yoff < ctx->oy && yoff + ny > ctx->oy + ctx->sy) { 1052 /* Both left and right not visible. */ 1053 *j = ctx->oy; 1054 *y = 0; 1055 *ry = ctx->sy; 1056 } else if (yoff < ctx->oy) { 1057 /* Left not visible. */ 1058 *j = ctx->oy - (ctx->yoff + py); 1059 *y = 0; 1060 *ry = ny - *j; 1061 } else { 1062 /* Right not visible. */ 1063 *j = 0; 1064 *y = (ctx->yoff + py) - ctx->oy; 1065 *ry = ctx->sy - *y; 1066 } 1067 if (*ry > ny) 1068 fatalx("%s: y too big, %u > %u", __func__, *ry, ny); 1069 1070 return (1); 1071 } 1072 1073 /* Clear an area, adjusting to visible part of pane. */ 1074 static void 1075 tty_clear_area(struct tty *tty, const struct window_pane *wp, u_int py, 1076 u_int ny, u_int px, u_int nx, u_int bg) 1077 { 1078 struct client *c = tty->client; 1079 u_int yy; 1080 char tmp[64]; 1081 1082 log_debug("%s: %s, %u,%u at %u,%u", __func__, c->name, nx, ny, px, py); 1083 1084 /* Nothing to clear. */ 1085 if (nx == 0 || ny == 0) 1086 return; 1087 1088 /* If genuine BCE is available, can try escape sequences. */ 1089 if (!tty_fake_bce(tty, wp, bg)) { 1090 /* Use ED if clearing off the bottom of the terminal. */ 1091 if (px == 0 && 1092 px + nx >= tty->sx && 1093 py + ny >= tty->sy && 1094 tty_term_has(tty->term, TTYC_ED)) { 1095 tty_cursor(tty, 0, py); 1096 tty_putcode(tty, TTYC_ED); 1097 return; 1098 } 1099 1100 /* 1101 * On VT420 compatible terminals we can use DECFRA if the 1102 * background colour isn't default (because it doesn't work 1103 * after SGR 0). 1104 */ 1105 if (tty->term_type == TTY_VT420 && !COLOUR_DEFAULT(bg)) { 1106 xsnprintf(tmp, sizeof tmp, "\033[32;%u;%u;%u;%u$x", 1107 py + 1, px + 1, py + ny, px + nx); 1108 tty_puts(tty, tmp); 1109 return; 1110 } 1111 1112 /* Full lines can be scrolled away to clear them. */ 1113 if (px == 0 && 1114 px + nx >= tty->sx && 1115 ny > 2 && 1116 tty_term_has(tty->term, TTYC_CSR) && 1117 tty_term_has(tty->term, TTYC_INDN)) { 1118 tty_region(tty, py, py + ny - 1); 1119 tty_margin_off(tty); 1120 tty_putcode1(tty, TTYC_INDN, ny); 1121 return; 1122 } 1123 1124 /* 1125 * If margins are supported, can just scroll the area off to 1126 * clear it. 1127 */ 1128 if (nx > 2 && 1129 ny > 2 && 1130 tty_term_has(tty->term, TTYC_CSR) && 1131 tty_use_margin(tty) && 1132 tty_term_has(tty->term, TTYC_INDN)) { 1133 tty_region(tty, py, py + ny - 1); 1134 tty_margin(tty, px, px + nx - 1); 1135 tty_putcode1(tty, TTYC_INDN, ny); 1136 return; 1137 } 1138 } 1139 1140 /* Couldn't use an escape sequence, loop over the lines. */ 1141 for (yy = py; yy < py + ny; yy++) 1142 tty_clear_line(tty, wp, yy, px, nx, bg); 1143 } 1144 1145 /* Clear an area in a pane. */ 1146 static void 1147 tty_clear_pane_area(struct tty *tty, const struct tty_ctx *ctx, u_int py, 1148 u_int ny, u_int px, u_int nx, u_int bg) 1149 { 1150 u_int i, j, x, y, rx, ry; 1151 1152 if (tty_clamp_area(tty, ctx, px, py, nx, ny, &i, &j, &x, &y, &rx, &ry)) 1153 tty_clear_area(tty, ctx->wp, y, ry, x, rx, bg); 1154 } 1155 1156 static void 1157 tty_draw_pane(struct tty *tty, const struct tty_ctx *ctx, u_int py) 1158 { 1159 struct window_pane *wp = ctx->wp; 1160 struct screen *s = wp->screen; 1161 u_int nx = screen_size_x(s), i, x, rx, ry; 1162 1163 log_debug("%s: %s %u %d", __func__, tty->client->name, py, ctx->bigger); 1164 1165 if (!ctx->bigger) { 1166 tty_draw_line(tty, wp, s, 0, py, nx, ctx->xoff, ctx->yoff + py); 1167 return; 1168 } 1169 if (tty_clamp_line(tty, ctx, 0, py, nx, &i, &x, &rx, &ry)) 1170 tty_draw_line(tty, wp, s, i, py, rx, x, ry); 1171 } 1172 1173 static const struct grid_cell * 1174 tty_check_codeset(struct tty *tty, const struct grid_cell *gc) 1175 { 1176 static struct grid_cell new; 1177 u_int n; 1178 1179 /* Characters less than 0x7f are always fine, no matter what. */ 1180 if (gc->data.size == 1 && *gc->data.data < 0x7f) 1181 return (gc); 1182 1183 /* UTF-8 terminal and a UTF-8 character - fine. */ 1184 if (tty->flags & TTY_UTF8) 1185 return (gc); 1186 1187 /* Replace by the right number of underscores. */ 1188 n = gc->data.width; 1189 if (n > UTF8_SIZE) 1190 n = UTF8_SIZE; 1191 memcpy(&new, gc, sizeof new); 1192 new.data.size = n; 1193 memset(new.data.data, '_', n); 1194 return (&new); 1195 } 1196 1197 void 1198 tty_draw_line(struct tty *tty, const struct window_pane *wp, 1199 struct screen *s, u_int px, u_int py, u_int nx, u_int atx, u_int aty) 1200 { 1201 struct grid *gd = s->grid; 1202 struct grid_cell gc, last; 1203 const struct grid_cell *gcp; 1204 struct grid_line *gl; 1205 u_int i, j, ux, sx, width; 1206 int flags, cleared = 0; 1207 char buf[512]; 1208 size_t len, old_len; 1209 u_int cellsize; 1210 1211 log_debug("%s: px=%u py=%u nx=%u atx=%u aty=%u", __func__, 1212 px, py, nx, atx, aty); 1213 1214 /* 1215 * py is the line in the screen to draw. 1216 * px is the start x and nx is the width to draw. 1217 * atx,aty is the line on the terminal to draw it. 1218 */ 1219 1220 flags = (tty->flags & TTY_NOCURSOR); 1221 tty->flags |= TTY_NOCURSOR; 1222 tty_update_mode(tty, tty->mode, s); 1223 1224 tty_region_off(tty); 1225 tty_margin_off(tty); 1226 1227 /* 1228 * Clamp the width to cellsize - note this is not cellused, because 1229 * there may be empty background cells after it (from BCE). 1230 */ 1231 sx = screen_size_x(s); 1232 if (nx > sx) 1233 nx = sx; 1234 cellsize = grid_get_line(gd, gd->hsize + py)->cellsize; 1235 if (sx > cellsize) 1236 sx = cellsize; 1237 if (sx > tty->sx) 1238 sx = tty->sx; 1239 if (sx > nx) 1240 sx = nx; 1241 ux = 0; 1242 1243 if (py == 0) 1244 gl = NULL; 1245 else 1246 gl = grid_get_line(gd, gd->hsize + py - 1); 1247 if (wp == NULL || 1248 gl == NULL || 1249 (~gl->flags & GRID_LINE_WRAPPED) || 1250 atx != 0 || 1251 tty->cx < tty->sx || 1252 nx < tty->sx) { 1253 if (nx < tty->sx && 1254 atx == 0 && 1255 px + sx != nx && 1256 tty_term_has(tty->term, TTYC_EL1) && 1257 !tty_fake_bce(tty, wp, 8)) { 1258 tty_default_attributes(tty, wp, 8); 1259 tty_cursor(tty, nx - 1, aty); 1260 tty_putcode(tty, TTYC_EL1); 1261 cleared = 1; 1262 } 1263 if (px + sx != 0) 1264 tty_cursor(tty, atx, aty); 1265 } else 1266 log_debug("%s: wrapped line %u", __func__, aty); 1267 1268 memcpy(&last, &grid_default_cell, sizeof last); 1269 len = 0; 1270 width = 0; 1271 1272 for (i = 0; i < sx; i++) { 1273 grid_view_get_cell(gd, px + i, py, &gc); 1274 gcp = tty_check_codeset(tty, &gc); 1275 if (len != 0 && 1276 ((gcp->attr & GRID_ATTR_CHARSET) || 1277 gcp->flags != last.flags || 1278 gcp->attr != last.attr || 1279 gcp->fg != last.fg || 1280 gcp->bg != last.bg || 1281 ux + width + gcp->data.width >= nx || 1282 (sizeof buf) - len < gcp->data.size)) { 1283 tty_attributes(tty, &last, wp); 1284 tty_putn(tty, buf, len, width); 1285 ux += width; 1286 1287 len = 0; 1288 width = 0; 1289 } 1290 1291 if (gcp->flags & GRID_FLAG_SELECTED) 1292 screen_select_cell(s, &last, gcp); 1293 else 1294 memcpy(&last, gcp, sizeof last); 1295 if (ux + gcp->data.width > nx) { 1296 tty_attributes(tty, &last, wp); 1297 for (j = 0; j < gcp->data.width; j++) { 1298 if (ux + j > nx) 1299 break; 1300 tty_putc(tty, ' '); 1301 ux++; 1302 } 1303 } else if (gcp->attr & GRID_ATTR_CHARSET) { 1304 tty_attributes(tty, &last, wp); 1305 for (j = 0; j < gcp->data.size; j++) 1306 tty_putc(tty, gcp->data.data[j]); 1307 ux += gc.data.width; 1308 } else { 1309 memcpy(buf + len, gcp->data.data, gcp->data.size); 1310 len += gcp->data.size; 1311 width += gcp->data.width; 1312 } 1313 } 1314 if (len != 0) { 1315 if (grid_cells_equal(&last, &grid_default_cell)) { 1316 old_len = len; 1317 while (len > 0 && buf[len - 1] == ' ') { 1318 len--; 1319 width--; 1320 } 1321 log_debug("%s: trimmed %zu spaces", __func__, 1322 old_len - len); 1323 } 1324 if (len != 0) { 1325 tty_attributes(tty, &last, wp); 1326 tty_putn(tty, buf, len, width); 1327 ux += width; 1328 } 1329 } 1330 1331 if (!cleared && ux < nx) { 1332 tty_default_attributes(tty, wp, 8); 1333 tty_clear_line(tty, wp, aty, atx + ux, nx - ux, 8); 1334 } 1335 1336 tty->flags = (tty->flags & ~TTY_NOCURSOR) | flags; 1337 tty_update_mode(tty, tty->mode, s); 1338 } 1339 1340 static int 1341 tty_client_ready(struct client *c, struct window_pane *wp) 1342 { 1343 if (c->session == NULL || c->tty.term == NULL) 1344 return (0); 1345 if (c->flags & (CLIENT_REDRAWWINDOW|CLIENT_SUSPENDED)) 1346 return (0); 1347 if (c->tty.flags & TTY_FREEZE) 1348 return (0); 1349 if (c->session->curw->window != wp->window) 1350 return (0); 1351 if (wp->layout_cell == NULL) 1352 return (0); 1353 return (1); 1354 } 1355 1356 void 1357 tty_write(void (*cmdfn)(struct tty *, const struct tty_ctx *), 1358 struct tty_ctx *ctx) 1359 { 1360 struct window_pane *wp = ctx->wp; 1361 struct client *c; 1362 1363 if (wp == NULL) 1364 return; 1365 if (wp->flags & (PANE_REDRAW|PANE_DROP)) 1366 return; 1367 1368 TAILQ_FOREACH(c, &clients, entry) { 1369 if (!tty_client_ready(c, wp)) 1370 continue; 1371 1372 ctx->bigger = tty_window_offset(&c->tty, &ctx->ox, &ctx->oy, 1373 &ctx->sx, &ctx->sy); 1374 1375 ctx->xoff = wp->xoff; 1376 ctx->yoff = wp->yoff; 1377 1378 if (status_at_line(c) == 0) 1379 ctx->yoff += status_line_size(c); 1380 1381 cmdfn(&c->tty, ctx); 1382 } 1383 } 1384 1385 void 1386 tty_cmd_insertcharacter(struct tty *tty, const struct tty_ctx *ctx) 1387 { 1388 struct window_pane *wp = ctx->wp; 1389 1390 if (ctx->bigger || 1391 !tty_pane_full_width(tty, ctx) || 1392 tty_fake_bce(tty, wp, ctx->bg) || 1393 (!tty_term_has(tty->term, TTYC_ICH) && 1394 !tty_term_has(tty->term, TTYC_ICH1))) { 1395 tty_draw_pane(tty, ctx, ctx->ocy); 1396 return; 1397 } 1398 1399 tty_default_attributes(tty, wp, ctx->bg); 1400 1401 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy); 1402 1403 tty_emulate_repeat(tty, TTYC_ICH, TTYC_ICH1, ctx->num); 1404 } 1405 1406 void 1407 tty_cmd_deletecharacter(struct tty *tty, const struct tty_ctx *ctx) 1408 { 1409 struct window_pane *wp = ctx->wp; 1410 1411 if (ctx->bigger || 1412 !tty_pane_full_width(tty, ctx) || 1413 tty_fake_bce(tty, wp, ctx->bg) || 1414 (!tty_term_has(tty->term, TTYC_DCH) && 1415 !tty_term_has(tty->term, TTYC_DCH1))) { 1416 tty_draw_pane(tty, ctx, ctx->ocy); 1417 return; 1418 } 1419 1420 tty_default_attributes(tty, wp, ctx->bg); 1421 1422 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy); 1423 1424 tty_emulate_repeat(tty, TTYC_DCH, TTYC_DCH1, ctx->num); 1425 } 1426 1427 void 1428 tty_cmd_clearcharacter(struct tty *tty, const struct tty_ctx *ctx) 1429 { 1430 if (ctx->bigger) { 1431 tty_draw_pane(tty, ctx, ctx->ocy); 1432 return; 1433 } 1434 1435 tty_default_attributes(tty, ctx->wp, ctx->bg); 1436 1437 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy); 1438 1439 if (tty_term_has(tty->term, TTYC_ECH) && 1440 !tty_fake_bce(tty, ctx->wp, 8)) 1441 tty_putcode1(tty, TTYC_ECH, ctx->num); 1442 else 1443 tty_repeat_space(tty, ctx->num); 1444 } 1445 1446 void 1447 tty_cmd_insertline(struct tty *tty, const struct tty_ctx *ctx) 1448 { 1449 if (ctx->bigger || 1450 !tty_pane_full_width(tty, ctx) || 1451 tty_fake_bce(tty, ctx->wp, ctx->bg) || 1452 !tty_term_has(tty->term, TTYC_CSR) || 1453 !tty_term_has(tty->term, TTYC_IL1) || 1454 ctx->wp->sx == 1 || 1455 ctx->wp->sy == 1) { 1456 tty_redraw_region(tty, ctx); 1457 return; 1458 } 1459 1460 tty_default_attributes(tty, ctx->wp, ctx->bg); 1461 1462 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower); 1463 tty_margin_off(tty); 1464 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy); 1465 1466 tty_emulate_repeat(tty, TTYC_IL, TTYC_IL1, ctx->num); 1467 tty->cx = tty->cy = UINT_MAX; 1468 } 1469 1470 void 1471 tty_cmd_deleteline(struct tty *tty, const struct tty_ctx *ctx) 1472 { 1473 if (ctx->bigger || 1474 !tty_pane_full_width(tty, ctx) || 1475 tty_fake_bce(tty, ctx->wp, ctx->bg) || 1476 !tty_term_has(tty->term, TTYC_CSR) || 1477 !tty_term_has(tty->term, TTYC_DL1) || 1478 ctx->wp->sx == 1 || 1479 ctx->wp->sy == 1) { 1480 tty_redraw_region(tty, ctx); 1481 return; 1482 } 1483 1484 tty_default_attributes(tty, ctx->wp, ctx->bg); 1485 1486 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower); 1487 tty_margin_off(tty); 1488 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy); 1489 1490 tty_emulate_repeat(tty, TTYC_DL, TTYC_DL1, ctx->num); 1491 tty->cx = tty->cy = UINT_MAX; 1492 } 1493 1494 void 1495 tty_cmd_clearline(struct tty *tty, const struct tty_ctx *ctx) 1496 { 1497 struct window_pane *wp = ctx->wp; 1498 u_int nx; 1499 1500 tty_default_attributes(tty, wp, ctx->bg); 1501 1502 nx = screen_size_x(wp->screen); 1503 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, nx, ctx->bg); 1504 } 1505 1506 void 1507 tty_cmd_clearendofline(struct tty *tty, const struct tty_ctx *ctx) 1508 { 1509 struct window_pane *wp = ctx->wp; 1510 u_int nx; 1511 1512 tty_default_attributes(tty, wp, ctx->bg); 1513 1514 nx = screen_size_x(wp->screen) - ctx->ocx; 1515 tty_clear_pane_line(tty, ctx, ctx->ocy, ctx->ocx, nx, ctx->bg); 1516 } 1517 1518 void 1519 tty_cmd_clearstartofline(struct tty *tty, const struct tty_ctx *ctx) 1520 { 1521 struct window_pane *wp = ctx->wp; 1522 1523 tty_default_attributes(tty, wp, ctx->bg); 1524 1525 tty_clear_pane_line(tty, ctx, ctx->ocy, 0, ctx->ocx + 1, ctx->bg); 1526 } 1527 1528 void 1529 tty_cmd_reverseindex(struct tty *tty, const struct tty_ctx *ctx) 1530 { 1531 struct window_pane *wp = ctx->wp; 1532 1533 if (ctx->ocy != ctx->orupper) 1534 return; 1535 1536 if (ctx->bigger || 1537 !tty_pane_full_width(tty, ctx) || 1538 tty_fake_bce(tty, wp, 8) || 1539 !tty_term_has(tty->term, TTYC_CSR) || 1540 !tty_term_has(tty->term, TTYC_RI) || 1541 ctx->wp->sx == 1 || 1542 ctx->wp->sy == 1) { 1543 tty_redraw_region(tty, ctx); 1544 return; 1545 } 1546 1547 tty_default_attributes(tty, wp, ctx->bg); 1548 1549 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower); 1550 tty_margin_off(tty); 1551 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->orupper); 1552 1553 tty_putcode(tty, TTYC_RI); 1554 } 1555 1556 void 1557 tty_cmd_linefeed(struct tty *tty, const struct tty_ctx *ctx) 1558 { 1559 struct window_pane *wp = ctx->wp; 1560 1561 if (ctx->ocy != ctx->orlower) 1562 return; 1563 1564 if (ctx->bigger || 1565 (!tty_pane_full_width(tty, ctx) && !tty_use_margin(tty)) || 1566 tty_fake_bce(tty, wp, 8) || 1567 !tty_term_has(tty->term, TTYC_CSR) || 1568 wp->sx == 1 || 1569 wp->sy == 1) { 1570 tty_redraw_region(tty, ctx); 1571 return; 1572 } 1573 1574 tty_default_attributes(tty, wp, ctx->bg); 1575 1576 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower); 1577 tty_margin_pane(tty, ctx); 1578 1579 /* 1580 * If we want to wrap a pane while using margins, the cursor needs to 1581 * be exactly on the right of the region. If the cursor is entirely off 1582 * the edge - move it back to the right. Some terminals are funny about 1583 * this and insert extra spaces, so only use the right if margins are 1584 * enabled. 1585 */ 1586 if (ctx->xoff + ctx->ocx > tty->rright) { 1587 if (!tty_use_margin(tty)) 1588 tty_cursor(tty, 0, ctx->yoff + ctx->ocy); 1589 else 1590 tty_cursor(tty, tty->rright, ctx->yoff + ctx->ocy); 1591 } else 1592 tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy); 1593 1594 tty_putc(tty, '\n'); 1595 } 1596 1597 void 1598 tty_cmd_scrollup(struct tty *tty, const struct tty_ctx *ctx) 1599 { 1600 struct window_pane *wp = ctx->wp; 1601 u_int i; 1602 1603 if (ctx->bigger || 1604 (!tty_pane_full_width(tty, ctx) && !tty_use_margin(tty)) || 1605 tty_fake_bce(tty, wp, 8) || 1606 !tty_term_has(tty->term, TTYC_CSR) || 1607 wp->sx == 1 || 1608 wp->sy == 1) { 1609 tty_redraw_region(tty, ctx); 1610 return; 1611 } 1612 1613 tty_default_attributes(tty, wp, ctx->bg); 1614 1615 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower); 1616 tty_margin_pane(tty, ctx); 1617 1618 if (ctx->num == 1 || !tty_term_has(tty->term, TTYC_INDN)) { 1619 if (!tty_use_margin(tty)) 1620 tty_cursor(tty, 0, tty->rlower); 1621 else 1622 tty_cursor(tty, tty->rright, tty->rlower); 1623 for (i = 0; i < ctx->num; i++) 1624 tty_putc(tty, '\n'); 1625 } else { 1626 tty_cursor(tty, 0, tty->cy); 1627 tty_putcode1(tty, TTYC_INDN, ctx->num); 1628 } 1629 } 1630 1631 void 1632 tty_cmd_clearendofscreen(struct tty *tty, const struct tty_ctx *ctx) 1633 { 1634 struct window_pane *wp = ctx->wp; 1635 u_int px, py, nx, ny; 1636 1637 tty_default_attributes(tty, wp, ctx->bg); 1638 1639 tty_region_pane(tty, ctx, 0, screen_size_y(wp->screen) - 1); 1640 tty_margin_off(tty); 1641 1642 px = 0; 1643 nx = screen_size_x(wp->screen); 1644 py = ctx->ocy + 1; 1645 ny = screen_size_y(wp->screen) - ctx->ocy - 1; 1646 1647 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg); 1648 1649 px = ctx->ocx; 1650 nx = screen_size_x(wp->screen) - ctx->ocx; 1651 py = ctx->ocy; 1652 1653 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg); 1654 } 1655 1656 void 1657 tty_cmd_clearstartofscreen(struct tty *tty, const struct tty_ctx *ctx) 1658 { 1659 struct window_pane *wp = ctx->wp; 1660 u_int px, py, nx, ny; 1661 1662 tty_default_attributes(tty, wp, ctx->bg); 1663 1664 tty_region_pane(tty, ctx, 0, screen_size_y(wp->screen) - 1); 1665 tty_margin_off(tty); 1666 1667 px = 0; 1668 nx = screen_size_x(wp->screen); 1669 py = 0; 1670 ny = ctx->ocy - 1; 1671 1672 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg); 1673 1674 px = 0; 1675 nx = ctx->ocx + 1; 1676 py = ctx->ocy; 1677 1678 tty_clear_pane_line(tty, ctx, py, px, nx, ctx->bg); 1679 } 1680 1681 void 1682 tty_cmd_clearscreen(struct tty *tty, const struct tty_ctx *ctx) 1683 { 1684 struct window_pane *wp = ctx->wp; 1685 u_int px, py, nx, ny; 1686 1687 tty_default_attributes(tty, wp, ctx->bg); 1688 1689 tty_region_pane(tty, ctx, 0, screen_size_y(wp->screen) - 1); 1690 tty_margin_off(tty); 1691 1692 px = 0; 1693 nx = screen_size_x(wp->screen); 1694 py = 0; 1695 ny = screen_size_y(wp->screen); 1696 1697 tty_clear_pane_area(tty, ctx, py, ny, px, nx, ctx->bg); 1698 } 1699 1700 void 1701 tty_cmd_alignmenttest(struct tty *tty, const struct tty_ctx *ctx) 1702 { 1703 struct window_pane *wp = ctx->wp; 1704 struct screen *s = wp->screen; 1705 u_int i, j; 1706 1707 if (ctx->bigger) { 1708 wp->flags |= PANE_REDRAW; 1709 return; 1710 } 1711 1712 tty_attributes(tty, &grid_default_cell, wp); 1713 1714 tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1); 1715 tty_margin_off(tty); 1716 1717 for (j = 0; j < screen_size_y(s); j++) { 1718 tty_cursor_pane(tty, ctx, 0, j); 1719 for (i = 0; i < screen_size_x(s); i++) 1720 tty_putc(tty, 'E'); 1721 } 1722 } 1723 1724 void 1725 tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx) 1726 { 1727 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, 1, 1)) 1728 return; 1729 1730 if (ctx->xoff + ctx->ocx - ctx->ox > tty->sx - 1 && 1731 ctx->ocy == ctx->orlower && 1732 tty_pane_full_width(tty, ctx)) 1733 tty_region_pane(tty, ctx, ctx->orupper, ctx->orlower); 1734 1735 tty_margin_off(tty); 1736 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy); 1737 1738 tty_cell(tty, ctx->cell, ctx->wp); 1739 } 1740 1741 void 1742 tty_cmd_cells(struct tty *tty, const struct tty_ctx *ctx) 1743 { 1744 struct window_pane *wp = ctx->wp; 1745 1746 if (!tty_is_visible(tty, ctx, ctx->ocx, ctx->ocy, ctx->num, 1)) 1747 return; 1748 1749 if (ctx->bigger && 1750 (ctx->xoff + ctx->ocx < ctx->ox || 1751 ctx->xoff + ctx->ocx + ctx->num > ctx->ox + ctx->sx)) { 1752 if (!ctx->wrapped || 1753 !tty_pane_full_width(tty, ctx) || 1754 (tty->term->flags & TERM_EARLYWRAP) || 1755 ctx->xoff + ctx->ocx != 0 || 1756 ctx->yoff + ctx->ocy != tty->cy + 1 || 1757 tty->cx < tty->sx || 1758 tty->cy == tty->rlower) 1759 tty_draw_pane(tty, ctx, ctx->ocy); 1760 else 1761 wp->flags |= PANE_REDRAW; 1762 return; 1763 } 1764 1765 tty_margin_off(tty); 1766 tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy); 1767 1768 tty_attributes(tty, ctx->cell, ctx->wp); 1769 tty_putn(tty, ctx->ptr, ctx->num, ctx->num); 1770 } 1771 1772 void 1773 tty_cmd_setselection(struct tty *tty, const struct tty_ctx *ctx) 1774 { 1775 char *buf; 1776 size_t off; 1777 1778 if (!tty_term_has(tty->term, TTYC_MS)) 1779 return; 1780 1781 off = 4 * ((ctx->num + 2) / 3) + 1; /* storage for base64 */ 1782 buf = xmalloc(off); 1783 1784 b64_ntop(ctx->ptr, ctx->num, buf, off); 1785 tty_putcode_ptr2(tty, TTYC_MS, "", buf); 1786 1787 free(buf); 1788 } 1789 1790 void 1791 tty_cmd_rawstring(struct tty *tty, const struct tty_ctx *ctx) 1792 { 1793 tty_add(tty, ctx->ptr, ctx->num); 1794 tty_invalidate(tty); 1795 } 1796 1797 static void 1798 tty_cell(struct tty *tty, const struct grid_cell *gc, 1799 const struct window_pane *wp) 1800 { 1801 const struct grid_cell *gcp; 1802 1803 /* Skip last character if terminal is stupid. */ 1804 if ((tty->term->flags & TERM_EARLYWRAP) && 1805 tty->cy == tty->sy - 1 && 1806 tty->cx == tty->sx - 1) 1807 return; 1808 1809 /* If this is a padding character, do nothing. */ 1810 if (gc->flags & GRID_FLAG_PADDING) 1811 return; 1812 1813 /* Set the attributes. */ 1814 tty_attributes(tty, gc, wp); 1815 1816 /* Get the cell and if ASCII write with putc to do ACS translation. */ 1817 gcp = tty_check_codeset(tty, gc); 1818 if (gcp->data.size == 1) { 1819 if (*gcp->data.data < 0x20 || *gcp->data.data == 0x7f) 1820 return; 1821 tty_putc(tty, *gcp->data.data); 1822 return; 1823 } 1824 1825 /* Write the data. */ 1826 tty_putn(tty, gcp->data.data, gcp->data.size, gcp->data.width); 1827 } 1828 1829 void 1830 tty_reset(struct tty *tty) 1831 { 1832 struct grid_cell *gc = &tty->cell; 1833 1834 if (!grid_cells_equal(gc, &grid_default_cell)) { 1835 if ((gc->attr & GRID_ATTR_CHARSET) && tty_acs_needed(tty)) 1836 tty_putcode(tty, TTYC_RMACS); 1837 tty_putcode(tty, TTYC_SGR0); 1838 memcpy(gc, &grid_default_cell, sizeof *gc); 1839 } 1840 1841 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell); 1842 tty->last_wp = -1; 1843 } 1844 1845 static void 1846 tty_invalidate(struct tty *tty) 1847 { 1848 memcpy(&tty->cell, &grid_default_cell, sizeof tty->cell); 1849 1850 memcpy(&tty->last_cell, &grid_default_cell, sizeof tty->last_cell); 1851 tty->last_wp = -1; 1852 1853 tty->cx = tty->cy = UINT_MAX; 1854 1855 tty->rupper = tty->rleft = UINT_MAX; 1856 tty->rlower = tty->rright = UINT_MAX; 1857 1858 if (tty->flags & TTY_STARTED) { 1859 tty_putcode(tty, TTYC_SGR0); 1860 1861 tty->mode = ALL_MODES; 1862 tty_update_mode(tty, MODE_CURSOR, NULL); 1863 1864 tty_cursor(tty, 0, 0); 1865 tty_region_off(tty); 1866 tty_margin_off(tty); 1867 } else 1868 tty->mode = MODE_CURSOR; 1869 } 1870 1871 /* Turn off margin. */ 1872 void 1873 tty_region_off(struct tty *tty) 1874 { 1875 tty_region(tty, 0, tty->sy - 1); 1876 } 1877 1878 /* Set region inside pane. */ 1879 static void 1880 tty_region_pane(struct tty *tty, const struct tty_ctx *ctx, u_int rupper, 1881 u_int rlower) 1882 { 1883 tty_region(tty, ctx->yoff + rupper - ctx->oy, 1884 ctx->yoff + rlower - ctx->oy); 1885 } 1886 1887 /* Set region at absolute position. */ 1888 static void 1889 tty_region(struct tty *tty, u_int rupper, u_int rlower) 1890 { 1891 if (tty->rlower == rlower && tty->rupper == rupper) 1892 return; 1893 if (!tty_term_has(tty->term, TTYC_CSR)) 1894 return; 1895 1896 tty->rupper = rupper; 1897 tty->rlower = rlower; 1898 1899 /* 1900 * Some terminals (such as PuTTY) do not correctly reset the cursor to 1901 * 0,0 if it is beyond the last column (they do not reset their wrap 1902 * flag so further output causes a line feed). As a workaround, do an 1903 * explicit move to 0 first. 1904 */ 1905 if (tty->cx >= tty->sx) 1906 tty_cursor(tty, 0, tty->cy); 1907 1908 tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower); 1909 tty->cx = tty->cy = UINT_MAX; 1910 } 1911 1912 /* Turn off margin. */ 1913 void 1914 tty_margin_off(struct tty *tty) 1915 { 1916 tty_margin(tty, 0, tty->sx - 1); 1917 } 1918 1919 /* Set margin inside pane. */ 1920 static void 1921 tty_margin_pane(struct tty *tty, const struct tty_ctx *ctx) 1922 { 1923 tty_margin(tty, ctx->xoff - ctx->ox, 1924 ctx->xoff + ctx->wp->sx - 1 - ctx->ox); 1925 } 1926 1927 /* Set margin at absolute position. */ 1928 static void 1929 tty_margin(struct tty *tty, u_int rleft, u_int rright) 1930 { 1931 char s[64]; 1932 1933 if (!tty_use_margin(tty)) 1934 return; 1935 if (tty->rleft == rleft && tty->rright == rright) 1936 return; 1937 1938 tty_putcode2(tty, TTYC_CSR, tty->rupper, tty->rlower); 1939 1940 tty->rleft = rleft; 1941 tty->rright = rright; 1942 1943 if (rleft == 0 && rright == tty->sx - 1) 1944 snprintf(s, sizeof s, "\033[s"); 1945 else 1946 snprintf(s, sizeof s, "\033[%u;%us", rleft + 1, rright + 1); 1947 tty_puts(tty, s); 1948 tty->cx = tty->cy = UINT_MAX; 1949 } 1950 1951 /* 1952 * Move the cursor, unless it would wrap itself when the next character is 1953 * printed. 1954 */ 1955 static void 1956 tty_cursor_pane_unless_wrap(struct tty *tty, const struct tty_ctx *ctx, 1957 u_int cx, u_int cy) 1958 { 1959 if (!ctx->wrapped || 1960 !tty_pane_full_width(tty, ctx) || 1961 (tty->term->flags & TERM_EARLYWRAP) || 1962 ctx->xoff + cx != 0 || 1963 ctx->yoff + cy != tty->cy + 1 || 1964 tty->cx < tty->sx || 1965 tty->cy == tty->rlower) 1966 tty_cursor_pane(tty, ctx, cx, cy); 1967 else 1968 log_debug("%s: will wrap at %u,%u", __func__, tty->cx, tty->cy); 1969 } 1970 1971 /* Move cursor inside pane. */ 1972 static void 1973 tty_cursor_pane(struct tty *tty, const struct tty_ctx *ctx, u_int cx, u_int cy) 1974 { 1975 tty_cursor(tty, ctx->xoff + cx - ctx->ox, ctx->yoff + cy - ctx->oy); 1976 } 1977 1978 /* Move cursor to absolute position. */ 1979 void 1980 tty_cursor(struct tty *tty, u_int cx, u_int cy) 1981 { 1982 struct tty_term *term = tty->term; 1983 u_int thisx, thisy; 1984 int change; 1985 1986 if (cx > tty->sx - 1) 1987 cx = tty->sx - 1; 1988 1989 thisx = tty->cx; 1990 thisy = tty->cy; 1991 1992 /* No change. */ 1993 if (cx == thisx && cy == thisy) 1994 return; 1995 1996 /* Very end of the line, just use absolute movement. */ 1997 if (thisx > tty->sx - 1) 1998 goto absolute; 1999 2000 /* Move to home position (0, 0). */ 2001 if (cx == 0 && cy == 0 && tty_term_has(term, TTYC_HOME)) { 2002 tty_putcode(tty, TTYC_HOME); 2003 goto out; 2004 } 2005 2006 /* Zero on the next line. */ 2007 if (cx == 0 && cy == thisy + 1 && thisy != tty->rlower && 2008 (!tty_use_margin(tty) || tty->rleft == 0)) { 2009 tty_putc(tty, '\r'); 2010 tty_putc(tty, '\n'); 2011 goto out; 2012 } 2013 2014 /* Moving column or row. */ 2015 if (cy == thisy) { 2016 /* 2017 * Moving column only, row staying the same. 2018 */ 2019 2020 /* To left edge. */ 2021 if (cx == 0 && (!tty_use_margin(tty) || tty->rleft == 0)) { 2022 tty_putc(tty, '\r'); 2023 goto out; 2024 } 2025 2026 /* One to the left. */ 2027 if (cx == thisx - 1 && tty_term_has(term, TTYC_CUB1)) { 2028 tty_putcode(tty, TTYC_CUB1); 2029 goto out; 2030 } 2031 2032 /* One to the right. */ 2033 if (cx == thisx + 1 && tty_term_has(term, TTYC_CUF1)) { 2034 tty_putcode(tty, TTYC_CUF1); 2035 goto out; 2036 } 2037 2038 /* Calculate difference. */ 2039 change = thisx - cx; /* +ve left, -ve right */ 2040 2041 /* 2042 * Use HPA if change is larger than absolute, otherwise move 2043 * the cursor with CUB/CUF. 2044 */ 2045 if ((u_int) abs(change) > cx && tty_term_has(term, TTYC_HPA)) { 2046 tty_putcode1(tty, TTYC_HPA, cx); 2047 goto out; 2048 } else if (change > 0 && tty_term_has(term, TTYC_CUB)) { 2049 if (change == 2 && tty_term_has(term, TTYC_CUB1)) { 2050 tty_putcode(tty, TTYC_CUB1); 2051 tty_putcode(tty, TTYC_CUB1); 2052 goto out; 2053 } 2054 tty_putcode1(tty, TTYC_CUB, change); 2055 goto out; 2056 } else if (change < 0 && tty_term_has(term, TTYC_CUF)) { 2057 tty_putcode1(tty, TTYC_CUF, -change); 2058 goto out; 2059 } 2060 } else if (cx == thisx) { 2061 /* 2062 * Moving row only, column staying the same. 2063 */ 2064 2065 /* One above. */ 2066 if (thisy != tty->rupper && 2067 cy == thisy - 1 && tty_term_has(term, TTYC_CUU1)) { 2068 tty_putcode(tty, TTYC_CUU1); 2069 goto out; 2070 } 2071 2072 /* One below. */ 2073 if (thisy != tty->rlower && 2074 cy == thisy + 1 && tty_term_has(term, TTYC_CUD1)) { 2075 tty_putcode(tty, TTYC_CUD1); 2076 goto out; 2077 } 2078 2079 /* Calculate difference. */ 2080 change = thisy - cy; /* +ve up, -ve down */ 2081 2082 /* 2083 * Try to use VPA if change is larger than absolute or if this 2084 * change would cross the scroll region, otherwise use CUU/CUD. 2085 */ 2086 if ((u_int) abs(change) > cy || 2087 (change < 0 && cy - change > tty->rlower) || 2088 (change > 0 && cy - change < tty->rupper)) { 2089 if (tty_term_has(term, TTYC_VPA)) { 2090 tty_putcode1(tty, TTYC_VPA, cy); 2091 goto out; 2092 } 2093 } else if (change > 0 && tty_term_has(term, TTYC_CUU)) { 2094 tty_putcode1(tty, TTYC_CUU, change); 2095 goto out; 2096 } else if (change < 0 && tty_term_has(term, TTYC_CUD)) { 2097 tty_putcode1(tty, TTYC_CUD, -change); 2098 goto out; 2099 } 2100 } 2101 2102 absolute: 2103 /* Absolute movement. */ 2104 tty_putcode2(tty, TTYC_CUP, cy, cx); 2105 2106 out: 2107 tty->cx = cx; 2108 tty->cy = cy; 2109 } 2110 2111 void 2112 tty_attributes(struct tty *tty, const struct grid_cell *gc, 2113 const struct window_pane *wp) 2114 { 2115 struct grid_cell *tc = &tty->cell, gc2; 2116 int changed; 2117 2118 /* Ignore cell if it is the same as the last one. */ 2119 if (wp != NULL && 2120 (int)wp->id == tty->last_wp && 2121 ~(wp->window->flags & WINDOW_STYLECHANGED) && 2122 gc->attr == tty->last_cell.attr && 2123 gc->fg == tty->last_cell.fg && 2124 gc->bg == tty->last_cell.bg) 2125 return; 2126 tty->last_wp = (wp != NULL ? (int)wp->id : -1); 2127 memcpy(&tty->last_cell, gc, sizeof tty->last_cell); 2128 2129 /* Copy cell and update default colours. */ 2130 memcpy(&gc2, gc, sizeof gc2); 2131 if (wp != NULL) 2132 tty_default_colours(&gc2, wp); 2133 2134 /* 2135 * If no setab, try to use the reverse attribute as a best-effort for a 2136 * non-default background. This is a bit of a hack but it doesn't do 2137 * any serious harm and makes a couple of applications happier. 2138 */ 2139 if (!tty_term_has(tty->term, TTYC_SETAB)) { 2140 if (gc2.attr & GRID_ATTR_REVERSE) { 2141 if (gc2.fg != 7 && !COLOUR_DEFAULT(gc2.fg)) 2142 gc2.attr &= ~GRID_ATTR_REVERSE; 2143 } else { 2144 if (gc2.bg != 0 && !COLOUR_DEFAULT(gc2.bg)) 2145 gc2.attr |= GRID_ATTR_REVERSE; 2146 } 2147 } 2148 2149 /* Fix up the colours if necessary. */ 2150 tty_check_fg(tty, wp, &gc2); 2151 tty_check_bg(tty, wp, &gc2); 2152 2153 /* If any bits are being cleared, reset everything. */ 2154 if (tc->attr & ~gc2.attr) 2155 tty_reset(tty); 2156 2157 /* 2158 * Set the colours. This may call tty_reset() (so it comes next) and 2159 * may add to (NOT remove) the desired attributes by changing new_attr. 2160 */ 2161 tty_colours(tty, &gc2); 2162 2163 /* Filter out attribute bits already set. */ 2164 changed = gc2.attr & ~tc->attr; 2165 tc->attr = gc2.attr; 2166 2167 /* Set the attributes. */ 2168 if (changed & GRID_ATTR_BRIGHT) 2169 tty_putcode(tty, TTYC_BOLD); 2170 if (changed & GRID_ATTR_DIM) 2171 tty_putcode(tty, TTYC_DIM); 2172 if (changed & GRID_ATTR_ITALICS) 2173 tty_set_italics(tty); 2174 if (changed & GRID_ATTR_ALL_UNDERSCORE) { 2175 if ((changed & GRID_ATTR_UNDERSCORE) || 2176 !tty_term_has(tty->term, TTYC_SMULX)) 2177 tty_putcode(tty, TTYC_SMUL); 2178 else if (changed & GRID_ATTR_UNDERSCORE_2) 2179 tty_putcode1(tty, TTYC_SMULX, 2); 2180 else if (changed & GRID_ATTR_UNDERSCORE_3) 2181 tty_putcode1(tty, TTYC_SMULX, 3); 2182 else if (changed & GRID_ATTR_UNDERSCORE_4) 2183 tty_putcode1(tty, TTYC_SMULX, 4); 2184 else if (changed & GRID_ATTR_UNDERSCORE_5) 2185 tty_putcode1(tty, TTYC_SMULX, 5); 2186 } 2187 if (changed & GRID_ATTR_BLINK) 2188 tty_putcode(tty, TTYC_BLINK); 2189 if (changed & GRID_ATTR_REVERSE) { 2190 if (tty_term_has(tty->term, TTYC_REV)) 2191 tty_putcode(tty, TTYC_REV); 2192 else if (tty_term_has(tty->term, TTYC_SMSO)) 2193 tty_putcode(tty, TTYC_SMSO); 2194 } 2195 if (changed & GRID_ATTR_HIDDEN) 2196 tty_putcode(tty, TTYC_INVIS); 2197 if (changed & GRID_ATTR_STRIKETHROUGH) 2198 tty_putcode(tty, TTYC_SMXX); 2199 if ((changed & GRID_ATTR_CHARSET) && tty_acs_needed(tty)) 2200 tty_putcode(tty, TTYC_SMACS); 2201 } 2202 2203 static void 2204 tty_colours(struct tty *tty, const struct grid_cell *gc) 2205 { 2206 struct grid_cell *tc = &tty->cell; 2207 int have_ax; 2208 2209 /* No changes? Nothing is necessary. */ 2210 if (gc->fg == tc->fg && gc->bg == tc->bg) 2211 return; 2212 2213 /* 2214 * Is either the default colour? This is handled specially because the 2215 * best solution might be to reset both colours to default, in which 2216 * case if only one is default need to fall onward to set the other 2217 * colour. 2218 */ 2219 if (COLOUR_DEFAULT(gc->fg) || COLOUR_DEFAULT(gc->bg)) { 2220 /* 2221 * If don't have AX but do have op, send sgr0 (op can't 2222 * actually be used because it is sometimes the same as sgr0 2223 * and sometimes isn't). This resets both colours to default. 2224 * 2225 * Otherwise, try to set the default colour only as needed. 2226 */ 2227 have_ax = tty_term_flag(tty->term, TTYC_AX); 2228 if (!have_ax && tty_term_has(tty->term, TTYC_OP)) 2229 tty_reset(tty); 2230 else { 2231 if (COLOUR_DEFAULT(gc->fg) && !COLOUR_DEFAULT(tc->fg)) { 2232 if (have_ax) 2233 tty_puts(tty, "\033[39m"); 2234 else if (tc->fg != 7) 2235 tty_putcode1(tty, TTYC_SETAF, 7); 2236 tc->fg = gc->fg; 2237 } 2238 if (COLOUR_DEFAULT(gc->bg) && !COLOUR_DEFAULT(tc->bg)) { 2239 if (have_ax) 2240 tty_puts(tty, "\033[49m"); 2241 else if (tc->bg != 0) 2242 tty_putcode1(tty, TTYC_SETAB, 0); 2243 tc->bg = gc->bg; 2244 } 2245 } 2246 } 2247 2248 /* Set the foreground colour. */ 2249 if (!COLOUR_DEFAULT(gc->fg) && gc->fg != tc->fg) 2250 tty_colours_fg(tty, gc); 2251 2252 /* 2253 * Set the background colour. This must come after the foreground as 2254 * tty_colour_fg() can call tty_reset(). 2255 */ 2256 if (!COLOUR_DEFAULT(gc->bg) && gc->bg != tc->bg) 2257 tty_colours_bg(tty, gc); 2258 } 2259 2260 static void 2261 tty_check_fg(struct tty *tty, const struct window_pane *wp, 2262 struct grid_cell *gc) 2263 { 2264 u_char r, g, b; 2265 u_int colours; 2266 int c; 2267 2268 /* 2269 * Perform substitution if this pane has a palette. If the bright 2270 * attribute is set, use the bright entry in the palette by changing to 2271 * the aixterm colour. 2272 */ 2273 if (~gc->flags & GRID_FLAG_NOPALETTE) { 2274 c = gc->fg; 2275 if (c < 8 && gc->attr & GRID_ATTR_BRIGHT) 2276 c += 90; 2277 if ((c = window_pane_get_palette(wp, c)) != -1) 2278 gc->fg = c; 2279 } 2280 2281 /* Is this a 24-bit colour? */ 2282 if (gc->fg & COLOUR_FLAG_RGB) { 2283 /* Not a 24-bit terminal? Translate to 256-colour palette. */ 2284 if (!tty_term_has(tty->term, TTYC_SETRGBF)) { 2285 colour_split_rgb(gc->fg, &r, &g, &b); 2286 gc->fg = colour_find_rgb(r, g, b); 2287 } else 2288 return; 2289 } 2290 2291 /* How many colours does this terminal have? */ 2292 if ((tty->term->flags|tty->term_flags) & TERM_256COLOURS) 2293 colours = 256; 2294 else 2295 colours = tty_term_number(tty->term, TTYC_COLORS); 2296 2297 /* Is this a 256-colour colour? */ 2298 if (gc->fg & COLOUR_FLAG_256) { 2299 /* And not a 256 colour mode? */ 2300 if (colours != 256) { 2301 gc->fg = colour_256to16(gc->fg); 2302 if (gc->fg & 8) { 2303 gc->fg &= 7; 2304 if (colours >= 16) 2305 gc->fg += 90; 2306 else 2307 gc->attr |= GRID_ATTR_BRIGHT; 2308 } else 2309 gc->attr &= ~GRID_ATTR_BRIGHT; 2310 } 2311 return; 2312 } 2313 2314 /* Is this an aixterm colour? */ 2315 if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) { 2316 gc->fg -= 90; 2317 gc->attr |= GRID_ATTR_BRIGHT; 2318 } 2319 } 2320 2321 static void 2322 tty_check_bg(struct tty *tty, const struct window_pane *wp, 2323 struct grid_cell *gc) 2324 { 2325 u_char r, g, b; 2326 u_int colours; 2327 int c; 2328 2329 /* Perform substitution if this pane has a palette. */ 2330 if (~gc->flags & GRID_FLAG_NOPALETTE) { 2331 if ((c = window_pane_get_palette(wp, gc->bg)) != -1) 2332 gc->bg = c; 2333 } 2334 2335 /* Is this a 24-bit colour? */ 2336 if (gc->bg & COLOUR_FLAG_RGB) { 2337 /* Not a 24-bit terminal? Translate to 256-colour palette. */ 2338 if (!tty_term_has(tty->term, TTYC_SETRGBB)) { 2339 colour_split_rgb(gc->bg, &r, &g, &b); 2340 gc->bg = colour_find_rgb(r, g, b); 2341 } else 2342 return; 2343 } 2344 2345 /* How many colours does this terminal have? */ 2346 if ((tty->term->flags|tty->term_flags) & TERM_256COLOURS) 2347 colours = 256; 2348 else 2349 colours = tty_term_number(tty->term, TTYC_COLORS); 2350 2351 /* Is this a 256-colour colour? */ 2352 if (gc->bg & COLOUR_FLAG_256) { 2353 /* 2354 * And not a 256 colour mode? Translate to 16-colour 2355 * palette. Bold background doesn't exist portably, so just 2356 * discard the bold bit if set. 2357 */ 2358 if (colours != 256) { 2359 gc->bg = colour_256to16(gc->bg); 2360 if (gc->bg & 8) { 2361 gc->bg &= 7; 2362 if (colours >= 16) 2363 gc->fg += 90; 2364 } 2365 } 2366 return; 2367 } 2368 2369 /* Is this an aixterm colour? */ 2370 if (gc->bg >= 90 && gc->bg <= 97 && colours < 16) 2371 gc->bg -= 90; 2372 } 2373 2374 static void 2375 tty_colours_fg(struct tty *tty, const struct grid_cell *gc) 2376 { 2377 struct grid_cell *tc = &tty->cell; 2378 char s[32]; 2379 2380 /* Is this a 24-bit or 256-colour colour? */ 2381 if (gc->fg & COLOUR_FLAG_RGB || gc->fg & COLOUR_FLAG_256) { 2382 if (tty_try_colour(tty, gc->fg, "38") == 0) 2383 goto save_fg; 2384 /* Should not get here, already converted in tty_check_fg. */ 2385 return; 2386 } 2387 2388 /* Is this an aixterm bright colour? */ 2389 if (gc->fg >= 90 && gc->fg <= 97) { 2390 xsnprintf(s, sizeof s, "\033[%dm", gc->fg); 2391 tty_puts(tty, s); 2392 goto save_fg; 2393 } 2394 2395 /* Otherwise set the foreground colour. */ 2396 tty_putcode1(tty, TTYC_SETAF, gc->fg); 2397 2398 save_fg: 2399 /* Save the new values in the terminal current cell. */ 2400 tc->fg = gc->fg; 2401 } 2402 2403 static void 2404 tty_colours_bg(struct tty *tty, const struct grid_cell *gc) 2405 { 2406 struct grid_cell *tc = &tty->cell; 2407 char s[32]; 2408 2409 /* Is this a 24-bit or 256-colour colour? */ 2410 if (gc->bg & COLOUR_FLAG_RGB || gc->bg & COLOUR_FLAG_256) { 2411 if (tty_try_colour(tty, gc->bg, "48") == 0) 2412 goto save_bg; 2413 /* Should not get here, already converted in tty_check_bg. */ 2414 return; 2415 } 2416 2417 /* Is this an aixterm bright colour? */ 2418 if (gc->bg >= 90 && gc->bg <= 97) { 2419 xsnprintf(s, sizeof s, "\033[%dm", gc->bg + 10); 2420 tty_puts(tty, s); 2421 goto save_bg; 2422 } 2423 2424 /* Otherwise set the background colour. */ 2425 tty_putcode1(tty, TTYC_SETAB, gc->bg); 2426 2427 save_bg: 2428 /* Save the new values in the terminal current cell. */ 2429 tc->bg = gc->bg; 2430 } 2431 2432 static int 2433 tty_try_colour(struct tty *tty, int colour, const char *type) 2434 { 2435 u_char r, g, b; 2436 char s[32]; 2437 2438 if (colour & COLOUR_FLAG_256) { 2439 /* 2440 * If the user has specified -2 to the client (meaning 2441 * TERM_256COLOURS is set), setaf and setab may not work (or 2442 * they may not want to use them), so send the usual sequence. 2443 * 2444 * Also if RGB is set, setaf and setab do not support the 256 2445 * colour palette so use the sequences directly there too. 2446 */ 2447 if ((tty->term_flags & TERM_256COLOURS) || 2448 tty_term_has(tty->term, TTYC_RGB)) 2449 goto fallback_256; 2450 2451 /* 2452 * If the terminfo entry has 256 colours and setaf and setab 2453 * exist, assume that they work correctly. 2454 */ 2455 if (tty->term->flags & TERM_256COLOURS) { 2456 if (*type == '3') { 2457 if (!tty_term_has(tty->term, TTYC_SETAF)) 2458 goto fallback_256; 2459 tty_putcode1(tty, TTYC_SETAF, colour & 0xff); 2460 } else { 2461 if (!tty_term_has(tty->term, TTYC_SETAB)) 2462 goto fallback_256; 2463 tty_putcode1(tty, TTYC_SETAB, colour & 0xff); 2464 } 2465 return (0); 2466 } 2467 goto fallback_256; 2468 } 2469 2470 if (colour & COLOUR_FLAG_RGB) { 2471 if (*type == '3') { 2472 if (!tty_term_has(tty->term, TTYC_SETRGBF)) 2473 return (-1); 2474 colour_split_rgb(colour & 0xffffff, &r, &g, &b); 2475 tty_putcode3(tty, TTYC_SETRGBF, r, g, b); 2476 } else { 2477 if (!tty_term_has(tty->term, TTYC_SETRGBB)) 2478 return (-1); 2479 colour_split_rgb(colour & 0xffffff, &r, &g, &b); 2480 tty_putcode3(tty, TTYC_SETRGBB, r, g, b); 2481 } 2482 return (0); 2483 } 2484 2485 return (-1); 2486 2487 fallback_256: 2488 xsnprintf(s, sizeof s, "\033[%s;5;%dm", type, colour & 0xff); 2489 log_debug("%s: 256 colour fallback: %s", tty->client->name, s); 2490 tty_puts(tty, s); 2491 return (0); 2492 } 2493 2494 static void 2495 tty_default_colours(struct grid_cell *gc, const struct window_pane *wp) 2496 { 2497 struct window *w = wp->window; 2498 struct options *oo = w->options; 2499 const struct grid_cell *agc, *pgc, *wgc; 2500 int c; 2501 2502 if (w->flags & WINDOW_STYLECHANGED) { 2503 w->flags &= ~WINDOW_STYLECHANGED; 2504 agc = options_get_style(oo, "window-active-style"); 2505 memcpy(&w->active_style, agc, sizeof w->active_style); 2506 wgc = options_get_style(oo, "window-style"); 2507 memcpy(&w->style, wgc, sizeof w->style); 2508 } else { 2509 agc = &w->active_style; 2510 wgc = &w->style; 2511 } 2512 pgc = &wp->colgc; 2513 2514 if (gc->fg == 8) { 2515 if (pgc->fg != 8) 2516 gc->fg = pgc->fg; 2517 else if (wp == w->active && agc->fg != 8) 2518 gc->fg = agc->fg; 2519 else 2520 gc->fg = wgc->fg; 2521 2522 if (gc->fg != 8) { 2523 c = window_pane_get_palette(wp, gc->fg); 2524 if (c != -1) 2525 gc->fg = c; 2526 } 2527 } 2528 2529 if (gc->bg == 8) { 2530 if (pgc->bg != 8) 2531 gc->bg = pgc->bg; 2532 else if (wp == w->active && agc->bg != 8) 2533 gc->bg = agc->bg; 2534 else 2535 gc->bg = wgc->bg; 2536 2537 if (gc->bg != 8) { 2538 c = window_pane_get_palette(wp, gc->bg); 2539 if (c != -1) 2540 gc->bg = c; 2541 } 2542 } 2543 } 2544 2545 static void 2546 tty_default_attributes(struct tty *tty, const struct window_pane *wp, u_int bg) 2547 { 2548 static struct grid_cell gc; 2549 2550 memcpy(&gc, &grid_default_cell, sizeof gc); 2551 gc.bg = bg; 2552 tty_attributes(tty, &gc, wp); 2553 } 2554