status.c revision 1.55
1/* $OpenBSD: status.c,v 1.55 2009/12/03 22:50:10 nicm Exp $ */ 2 3/* 4 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> 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/time.h> 21 22#include <errno.h> 23#include <limits.h> 24#include <stdarg.h> 25#include <stdlib.h> 26#include <string.h> 27#include <time.h> 28#include <unistd.h> 29 30#include "tmux.h" 31 32char *status_redraw_get_left( 33 struct client *, time_t, int, struct grid_cell *, size_t *); 34char *status_redraw_get_right( 35 struct client *, time_t, int, struct grid_cell *, size_t *); 36char *status_job(struct client *, char **); 37void status_job_callback(struct job *); 38size_t status_width(struct client *, struct winlink *, time_t); 39char *status_print( 40 struct client *, struct winlink *, time_t, struct grid_cell *); 41void status_replace1(struct client *, 42 struct winlink *, char **, char **, char *, size_t, int); 43void status_message_callback(int, short, void *); 44 45void status_prompt_add_history(struct client *); 46char *status_prompt_complete(const char *); 47 48/* Retrieve options for left string. */ 49char * 50status_redraw_get_left(struct client *c, 51 time_t t, int utf8flag, struct grid_cell *gc, size_t *size) 52{ 53 struct session *s = c->session; 54 char *left; 55 u_char fg, bg, attr; 56 size_t leftlen; 57 58 fg = options_get_number(&s->options, "status-left-fg"); 59 if (fg != 8) 60 colour_set_fg(gc, fg); 61 bg = options_get_number(&s->options, "status-left-bg"); 62 if (bg != 8) 63 colour_set_bg(gc, bg); 64 attr = options_get_number(&s->options, "status-left-attr"); 65 if (attr != 0) 66 gc->attr = attr; 67 68 left = status_replace( 69 c, NULL, options_get_string(&s->options, "status-left"), t, 1); 70 71 *size = options_get_number(&s->options, "status-left-length"); 72 leftlen = screen_write_cstrlen(utf8flag, "%s", left); 73 if (leftlen < *size) 74 *size = leftlen; 75 return (left); 76} 77 78/* Retrieve options for right string. */ 79char * 80status_redraw_get_right(struct client *c, 81 time_t t, int utf8flag, struct grid_cell *gc, size_t *size) 82{ 83 struct session *s = c->session; 84 char *right; 85 u_char fg, bg, attr; 86 size_t rightlen; 87 88 fg = options_get_number(&s->options, "status-right-fg"); 89 if (fg != 8) 90 colour_set_fg(gc, fg); 91 bg = options_get_number(&s->options, "status-right-bg"); 92 if (bg != 8) 93 colour_set_bg(gc, bg); 94 attr = options_get_number(&s->options, "status-right-attr"); 95 if (attr != 0) 96 gc->attr = attr; 97 98 right = status_replace( 99 c, NULL, options_get_string(&s->options, "status-right"), t, 1); 100 101 *size = options_get_number(&s->options, "status-right-length"); 102 rightlen = screen_write_cstrlen(utf8flag, "%s", right); 103 if (rightlen < *size) 104 *size = rightlen; 105 return (right); 106} 107 108/* Draw status for client on the last lines of given context. */ 109int 110status_redraw(struct client *c) 111{ 112 struct screen_write_ctx ctx; 113 struct session *s = c->session; 114 struct winlink *wl; 115 struct screen old_status, window_list; 116 struct grid_cell stdgc, lgc, rgc, gc; 117 time_t t; 118 char *left, *right; 119 u_int offset, needed; 120 u_int wlstart, wlwidth, wlavailable, wloffset, wlsize; 121 size_t llen, rlen; 122 int larrow, rarrow, utf8flag; 123 124 /* No status line? */ 125 if (c->tty.sy == 0 || !options_get_number(&s->options, "status")) 126 return (1); 127 left = right = NULL; 128 larrow = rarrow = 0; 129 130 /* Update status timer. */ 131 if (gettimeofday(&c->status_timer, NULL) != 0) 132 fatal("gettimeofday failed"); 133 t = c->status_timer.tv_sec; 134 135 /* Set up default colour. */ 136 memcpy(&stdgc, &grid_default_cell, sizeof gc); 137 colour_set_fg(&stdgc, options_get_number(&s->options, "status-fg")); 138 colour_set_bg(&stdgc, options_get_number(&s->options, "status-bg")); 139 stdgc.attr |= options_get_number(&s->options, "status-attr"); 140 141 /* Create the target screen. */ 142 memcpy(&old_status, &c->status, sizeof old_status); 143 screen_init(&c->status, c->tty.sx, 1, 0); 144 screen_write_start(&ctx, NULL, &c->status); 145 for (offset = 0; offset < c->tty.sx; offset++) 146 screen_write_putc(&ctx, &stdgc, ' '); 147 screen_write_stop(&ctx); 148 149 /* If the height is one line, blank status line. */ 150 if (c->tty.sy <= 1) 151 goto out; 152 153 /* Get UTF-8 flag. */ 154 utf8flag = options_get_number(&s->options, "status-utf8"); 155 156 /* Work out left and right strings. */ 157 memcpy(&lgc, &stdgc, sizeof lgc); 158 left = status_redraw_get_left(c, t, utf8flag, &lgc, &llen); 159 memcpy(&rgc, &stdgc, sizeof rgc); 160 right = status_redraw_get_right(c, t, utf8flag, &rgc, &rlen); 161 162 /* 163 * Figure out how much space we have for the window list. If there 164 * isn't enough space, just show a blank status line. 165 */ 166 needed = 0; 167 if (llen != 0) 168 needed += llen + 1; 169 if (rlen != 0) 170 needed += rlen + 1; 171 if (c->tty.sx == 0 || c->tty.sx <= needed) 172 goto out; 173 wlavailable = c->tty.sx - needed; 174 175 /* Calculate the total size needed for the window list. */ 176 wlstart = wloffset = wlwidth = 0; 177 RB_FOREACH(wl, winlinks, &s->windows) { 178 if (wl->status_text != NULL) 179 xfree(wl->status_text); 180 memcpy(&wl->status_cell, &stdgc, sizeof wl->status_cell); 181 wl->status_text = status_print(c, wl, t, &wl->status_cell); 182 wl->status_width = 183 screen_write_cstrlen(utf8flag, "%s", wl->status_text); 184 185 if (wl == s->curw) 186 wloffset = wlwidth; 187 wlwidth += wl->status_width + 1; 188 } 189 190 /* Create a new screen for the window list. */ 191 screen_init(&window_list, wlwidth, 1, 0); 192 193 /* And draw the window list into it. */ 194 screen_write_start(&ctx, NULL, &window_list); 195 RB_FOREACH(wl, winlinks, &s->windows) { 196 screen_write_cnputs(&ctx, 197 -1, &wl->status_cell, utf8flag, "%s", wl->status_text); 198 screen_write_putc(&ctx, &stdgc, ' '); 199 } 200 screen_write_stop(&ctx); 201 202 /* If there is enough space for the total width, skip to draw now. */ 203 if (wlwidth <= wlavailable) 204 goto draw; 205 206 /* Find size of current window text. */ 207 wlsize = s->curw->status_width; 208 209 /* 210 * If the current window is already on screen, good to draw from the 211 * start and just leave off the end. 212 */ 213 if (wloffset + wlsize < wlavailable) { 214 if (wlavailable > 0) { 215 rarrow = 1; 216 wlavailable--; 217 } 218 wlwidth = wlavailable; 219 } else { 220 /* 221 * Work out how many characters we need to omit from the 222 * start. There are wlavailable characters to fill, and 223 * wloffset + wlsize must be the last. So, the start character 224 * is wloffset + wlsize - wlavailable. 225 */ 226 if (wlavailable > 0) { 227 larrow = 1; 228 wlavailable--; 229 } 230 231 wlstart = wloffset + wlsize - wlavailable; 232 if (wlavailable > 0 && wlwidth > wlstart + wlavailable + 1) { 233 rarrow = 1; 234 wlstart++; 235 wlavailable--; 236 } 237 wlwidth = wlavailable; 238 } 239 240 /* Bail if anything is now too small too. */ 241 if (wlwidth == 0 || wlavailable == 0) { 242 screen_free(&window_list); 243 goto out; 244 } 245 246 /* 247 * Now the start position is known, work out the state of the left and 248 * right arrows. 249 */ 250 offset = 0; 251 RB_FOREACH(wl, winlinks, &s->windows) { 252 if (larrow == 1 && offset < wlstart) { 253 if (session_alert_has(s, wl, WINDOW_ACTIVITY)) 254 larrow = -1; 255 else if (session_alert_has(s, wl, WINDOW_BELL)) 256 larrow = -1; 257 else if (session_alert_has(s, wl, WINDOW_CONTENT)) 258 larrow = -1; 259 } 260 261 offset += wl->status_width; 262 263 if (rarrow == 1 && offset > wlstart + wlwidth) { 264 if (session_alert_has(s, wl, WINDOW_ACTIVITY)) 265 rarrow = -1; 266 else if (session_alert_has(s, wl, WINDOW_BELL)) 267 rarrow = -1; 268 else if (session_alert_has(s, wl, WINDOW_CONTENT)) 269 rarrow = -1; 270 } 271 } 272 273draw: 274 /* Begin drawing. */ 275 screen_write_start(&ctx, NULL, &c->status); 276 277 /* Draw the left string and arrow. */ 278 screen_write_cursormove(&ctx, 0, 0); 279 if (llen != 0) { 280 screen_write_cnputs(&ctx, llen, &lgc, utf8flag, "%s", left); 281 screen_write_putc(&ctx, &stdgc, ' '); 282 } 283 if (larrow != 0) { 284 memcpy(&gc, &stdgc, sizeof gc); 285 if (larrow == -1) 286 gc.attr ^= GRID_ATTR_REVERSE; 287 screen_write_putc(&ctx, &gc, '<'); 288 } 289 290 /* Draw the right string and arrow. */ 291 if (rarrow != 0) { 292 screen_write_cursormove(&ctx, c->tty.sx - rlen - 2, 0); 293 memcpy(&gc, &stdgc, sizeof gc); 294 if (rarrow == -1) 295 gc.attr ^= GRID_ATTR_REVERSE; 296 screen_write_putc(&ctx, &gc, '>'); 297 } else 298 screen_write_cursormove(&ctx, c->tty.sx - rlen - 1, 0); 299 if (rlen != 0) { 300 screen_write_putc(&ctx, &stdgc, ' '); 301 screen_write_cnputs(&ctx, rlen, &rgc, utf8flag, "%s", right); 302 } 303 304 /* Figure out the offset for the window list. */ 305 wloffset = 1; 306 if (wlwidth < wlavailable) { 307 switch (options_get_number(&s->options, "status-justify")) { 308 case 1: /* centered */ 309 wloffset = 1 + (wlavailable - wlwidth) / 2; 310 break; 311 case 2: /* right */ 312 wloffset = 1 + (wlavailable - wlwidth); 313 break; 314 } 315 } 316 wloffset += llen; 317 if (larrow != 0) 318 wloffset++; 319 320 /* Copy the window list. */ 321 screen_write_cursormove(&ctx, wloffset, 0); 322 screen_write_copy(&ctx, &window_list, wlstart, 0, wlwidth, 1); 323 screen_free(&window_list); 324 325 screen_write_stop(&ctx); 326 327out: 328 if (left != NULL) 329 xfree(left); 330 if (right != NULL) 331 xfree(right); 332 333 if (grid_compare(c->status.grid, old_status.grid) == 0) { 334 screen_free(&old_status); 335 return (0); 336 } 337 screen_free(&old_status); 338 return (1); 339} 340 341/* Replace a single special sequence (prefixed by #). */ 342void 343status_replace1(struct client *c,struct winlink *wl, 344 char **iptr, char **optr, char *out, size_t outsize, int jobsflag) 345{ 346 struct session *s = c->session; 347 char ch, tmp[256], *ptr, *endptr, *freeptr; 348 size_t ptrlen; 349 long limit; 350 351 if (wl == NULL) 352 wl = s->curw; 353 354 errno = 0; 355 limit = strtol(*iptr, &endptr, 10); 356 if ((limit == 0 && errno != EINVAL) || 357 (limit == LONG_MIN && errno != ERANGE) || 358 (limit == LONG_MAX && errno != ERANGE) || 359 limit != 0) 360 *iptr = endptr; 361 if (limit <= 0) 362 limit = LONG_MAX; 363 364 freeptr = NULL; 365 366 switch (*(*iptr)++) { 367 case '(': 368 if (!jobsflag) { 369 ch = ')'; 370 goto skip_to; 371 } 372 if ((ptr = status_job(c, iptr)) == NULL) 373 return; 374 freeptr = ptr; 375 goto do_replace; 376 case 'H': 377 if (gethostname(tmp, sizeof tmp) != 0) 378 fatal("gethostname failed"); 379 ptr = tmp; 380 goto do_replace; 381 case 'I': 382 xsnprintf(tmp, sizeof tmp, "%d", wl->idx); 383 ptr = tmp; 384 goto do_replace; 385 case 'P': 386 xsnprintf(tmp, sizeof tmp, "%u", 387 window_pane_index(wl->window, wl->window->active)); 388 ptr = tmp; 389 goto do_replace; 390 case 'S': 391 ptr = s->name; 392 goto do_replace; 393 case 'T': 394 ptr = wl->window->active->base.title; 395 goto do_replace; 396 case 'W': 397 ptr = wl->window->name; 398 goto do_replace; 399 case 'F': 400 tmp[0] = ' '; 401 if (session_alert_has(s, wl, WINDOW_CONTENT)) 402 tmp[0] = '+'; 403 else if (session_alert_has(s, wl, WINDOW_BELL)) 404 tmp[0] = '!'; 405 else if (session_alert_has(s, wl, WINDOW_ACTIVITY)) 406 tmp[0] = '#'; 407 else if (wl == s->curw) 408 tmp[0] = '*'; 409 else if (wl == TAILQ_FIRST(&s->lastw)) 410 tmp[0] = '-'; 411 tmp[1] = '\0'; 412 ptr = tmp; 413 goto do_replace; 414 case '[': 415 /* 416 * Embedded style, handled at display time. Leave present and 417 * skip input until ]. 418 */ 419 ch = ']'; 420 goto skip_to; 421 case '#': 422 *(*optr)++ = '#'; 423 break; 424 } 425 426 return; 427 428do_replace: 429 ptrlen = strlen(ptr); 430 if ((size_t) limit < ptrlen) 431 ptrlen = limit; 432 433 if (*optr + ptrlen >= out + outsize - 1) 434 return; 435 while (ptrlen > 0 && *ptr != '\0') { 436 *(*optr)++ = *ptr++; 437 ptrlen--; 438 } 439 440 if (freeptr != NULL) 441 xfree(freeptr); 442 return; 443 444skip_to: 445 *(*optr)++ = '#'; 446 447 (*iptr)--; /* include ch */ 448 while (**iptr != ch && **iptr != '\0') { 449 if (*optr >= out + outsize - 1) 450 break; 451 *(*optr)++ = *(*iptr)++; 452 } 453} 454 455/* Replace special sequences in fmt. */ 456char * 457status_replace(struct client *c, 458 struct winlink *wl, const char *fmt, time_t t, int jobsflag) 459{ 460 static char out[BUFSIZ]; 461 char in[BUFSIZ], ch, *iptr, *optr; 462 463 strftime(in, sizeof in, fmt, localtime(&t)); 464 in[(sizeof in) - 1] = '\0'; 465 466 iptr = in; 467 optr = out; 468 469 while (*iptr != '\0') { 470 if (optr >= out + (sizeof out) - 1) 471 break; 472 ch = *iptr++; 473 474 if (ch != '#') { 475 *optr++ = ch; 476 continue; 477 } 478 status_replace1(c, wl, &iptr, &optr, out, sizeof out, jobsflag); 479 } 480 *optr = '\0'; 481 482 return (xstrdup(out)); 483} 484 485/* Figure out job name and get its result, starting it off if necessary. */ 486char * 487status_job(struct client *c, char **iptr) 488{ 489 struct job *job; 490 char *cmd; 491 int lastesc; 492 size_t len; 493 494 if (**iptr == '\0') 495 return (NULL); 496 if (**iptr == ')') { /* no command given */ 497 (*iptr)++; 498 return (NULL); 499 } 500 501 cmd = xmalloc(strlen(*iptr) + 1); 502 len = 0; 503 504 lastesc = 0; 505 for (; **iptr != '\0'; (*iptr)++) { 506 if (!lastesc && **iptr == ')') 507 break; /* unescaped ) is the end */ 508 if (!lastesc && **iptr == '\\') { 509 lastesc = 1; 510 continue; /* skip \ if not escaped */ 511 } 512 lastesc = 0; 513 cmd[len++] = **iptr; 514 } 515 if (**iptr == '\0') /* no terminating ) */ { 516 xfree(cmd); 517 return (NULL); 518 } 519 (*iptr)++; /* skip final ) */ 520 cmd[len] = '\0'; 521 522 job = job_get(&c->status_jobs, cmd); 523 if (job == NULL) { 524 job = job_add(&c->status_jobs, 525 JOB_PERSIST, c, cmd, status_job_callback, xfree, NULL); 526 job_run(job); 527 } 528 if (job->data == NULL) 529 return (xstrdup("")); 530 return (xstrdup(job->data)); 531} 532 533/* Job has finished: save its result. */ 534void 535status_job_callback(struct job *job) 536{ 537 char *line, *buf; 538 size_t len; 539 540 buf = NULL; 541 if ((line = evbuffer_readline(job->event->input)) == NULL) { 542 len = EVBUFFER_LENGTH(job->event->input); 543 buf = xmalloc(len + 1); 544 if (len != 0) 545 memcpy(buf, EVBUFFER_DATA(job->event->input), len); 546 buf[len] = '\0'; 547 } 548 549 if (job->data != NULL) 550 xfree(job->data); 551 else 552 server_redraw_client(job->client); 553 job->data = xstrdup(line); 554 555 if (buf != NULL) 556 xfree(buf); 557} 558 559/* Calculate winlink status line entry width. */ 560size_t 561status_width(struct client *c, struct winlink *wl, time_t t) 562{ 563 struct options *oo = &wl->window->options; 564 struct session *s = c->session; 565 const char *fmt; 566 char *text; 567 size_t size; 568 int utf8flag; 569 570 utf8flag = options_get_number(&s->options, "status-utf8"); 571 572 fmt = options_get_string(&wl->window->options, "window-status-format"); 573 if (wl == s->curw) 574 fmt = options_get_string(oo, "window-status-current-format"); 575 576 text = status_replace(c, wl, fmt, t, 1); 577 size = screen_write_cstrlen(utf8flag, "%s", text); 578 xfree(text); 579 580 return (size); 581} 582 583/* Return winlink status line entry and adjust gc as necessary. */ 584char * 585status_print( 586 struct client *c, struct winlink *wl, time_t t, struct grid_cell *gc) 587{ 588 struct options *oo = &wl->window->options; 589 struct session *s = c->session; 590 const char *fmt; 591 char *text; 592 u_char fg, bg, attr; 593 594 fg = options_get_number(oo, "window-status-fg"); 595 if (fg != 8) 596 colour_set_fg(gc, fg); 597 bg = options_get_number(oo, "window-status-bg"); 598 if (bg != 8) 599 colour_set_bg(gc, bg); 600 attr = options_get_number(oo, "window-status-attr"); 601 if (attr != 0) 602 gc->attr = attr; 603 fmt = options_get_string(oo, "window-status-format"); 604 if (wl == s->curw) { 605 fg = options_get_number(oo, "window-status-current-fg"); 606 if (fg != 8) 607 colour_set_fg(gc, fg); 608 bg = options_get_number(oo, "window-status-current-bg"); 609 if (bg != 8) 610 colour_set_bg(gc, bg); 611 attr = options_get_number(oo, "window-status-current-attr"); 612 if (attr != 0) 613 gc->attr = attr; 614 fmt = options_get_string(oo, "window-status-current-format"); 615 } 616 617 if (session_alert_has(s, wl, WINDOW_ACTIVITY) || 618 session_alert_has(s, wl, WINDOW_BELL) || 619 session_alert_has(s, wl, WINDOW_CONTENT)) 620 gc->attr ^= GRID_ATTR_REVERSE; 621 622 text = status_replace(c, wl, fmt, t, 1); 623 return (text); 624} 625 626/* Set a status line message. */ 627void printflike2 628status_message_set(struct client *c, const char *fmt, ...) 629{ 630 struct timeval tv; 631 struct session *s = c->session; 632 struct message_entry *msg; 633 va_list ap; 634 int delay; 635 u_int i, limit; 636 637 status_prompt_clear(c); 638 status_message_clear(c); 639 640 va_start(ap, fmt); 641 xvasprintf(&c->message_string, fmt, ap); 642 va_end(ap); 643 644 ARRAY_EXPAND(&c->message_log, 1); 645 msg = &ARRAY_LAST(&c->message_log); 646 msg->msg_time = time(NULL); 647 msg->msg = xstrdup(c->message_string); 648 649 if (s == NULL) 650 limit = 0; 651 else 652 limit = options_get_number(&s->options, "message-limit"); 653 if (ARRAY_LENGTH(&c->message_log) > limit) { 654 limit = ARRAY_LENGTH(&c->message_log) - limit; 655 for (i = 0; i < limit; i++) { 656 msg = &ARRAY_FIRST(&c->message_log); 657 xfree(msg->msg); 658 ARRAY_REMOVE(&c->message_log, 0); 659 } 660 } 661 662 delay = options_get_number(&c->session->options, "display-time"); 663 tv.tv_sec = delay / 1000; 664 tv.tv_usec = (delay % 1000) * 1000L; 665 666 evtimer_del(&c->message_timer); 667 evtimer_set(&c->message_timer, status_message_callback, c); 668 evtimer_add(&c->message_timer, &tv); 669 670 c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE); 671 c->flags |= CLIENT_STATUS; 672} 673 674/* Clear status line message. */ 675void 676status_message_clear(struct client *c) 677{ 678 if (c->message_string == NULL) 679 return; 680 681 xfree(c->message_string); 682 c->message_string = NULL; 683 684 c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE); 685 c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */ 686 687 screen_reinit(&c->status); 688} 689 690/* Clear status line message after timer expires. */ 691/* ARGSUSED */ 692void 693status_message_callback(unused int fd, unused short event, void *data) 694{ 695 struct client *c = data; 696 697 status_message_clear(c); 698} 699 700/* Draw client message on status line of present else on last line. */ 701int 702status_message_redraw(struct client *c) 703{ 704 struct screen_write_ctx ctx; 705 struct session *s = c->session; 706 struct screen old_status; 707 size_t len; 708 struct grid_cell gc; 709 int utf8flag; 710 711 if (c->tty.sx == 0 || c->tty.sy == 0) 712 return (0); 713 memcpy(&old_status, &c->status, sizeof old_status); 714 screen_init(&c->status, c->tty.sx, 1, 0); 715 716 utf8flag = options_get_number(&s->options, "status-utf8"); 717 718 len = screen_write_strlen(utf8flag, "%s", c->message_string); 719 if (len > c->tty.sx) 720 len = c->tty.sx; 721 722 memcpy(&gc, &grid_default_cell, sizeof gc); 723 colour_set_fg(&gc, options_get_number(&s->options, "message-fg")); 724 colour_set_bg(&gc, options_get_number(&s->options, "message-bg")); 725 gc.attr |= options_get_number(&s->options, "message-attr"); 726 727 screen_write_start(&ctx, NULL, &c->status); 728 729 screen_write_cursormove(&ctx, 0, 0); 730 screen_write_nputs(&ctx, len, &gc, utf8flag, "%s", c->message_string); 731 for (; len < c->tty.sx; len++) 732 screen_write_putc(&ctx, &gc, ' '); 733 734 screen_write_stop(&ctx); 735 736 if (grid_compare(c->status.grid, old_status.grid) == 0) { 737 screen_free(&old_status); 738 return (0); 739 } 740 screen_free(&old_status); 741 return (1); 742} 743 744/* Enable status line prompt. */ 745void 746status_prompt_set(struct client *c, const char *msg, 747 int (*callbackfn)(void *, const char *), void (*freefn)(void *), 748 void *data, int flags) 749{ 750 int keys; 751 752 status_message_clear(c); 753 status_prompt_clear(c); 754 755 c->prompt_string = xstrdup(msg); 756 757 c->prompt_buffer = xstrdup(""); 758 c->prompt_index = 0; 759 760 c->prompt_callbackfn = callbackfn; 761 c->prompt_freefn = freefn; 762 c->prompt_data = data; 763 764 c->prompt_hindex = 0; 765 766 c->prompt_flags = flags; 767 768 keys = options_get_number(&c->session->options, "status-keys"); 769 if (keys == MODEKEY_EMACS) 770 mode_key_init(&c->prompt_mdata, &mode_key_tree_emacs_edit); 771 else 772 mode_key_init(&c->prompt_mdata, &mode_key_tree_vi_edit); 773 774 c->tty.flags |= (TTY_NOCURSOR|TTY_FREEZE); 775 c->flags |= CLIENT_STATUS; 776} 777 778/* Remove status line prompt. */ 779void 780status_prompt_clear(struct client *c) 781{ 782 if (c->prompt_string == NULL) 783 return; 784 785 if (c->prompt_freefn != NULL && c->prompt_data != NULL) 786 c->prompt_freefn(c->prompt_data); 787 788 xfree(c->prompt_string); 789 c->prompt_string = NULL; 790 791 xfree(c->prompt_buffer); 792 c->prompt_buffer = NULL; 793 794 c->tty.flags &= ~(TTY_NOCURSOR|TTY_FREEZE); 795 c->flags |= CLIENT_REDRAW; /* screen was frozen and may have changed */ 796 797 screen_reinit(&c->status); 798} 799 800/* Update status line prompt with a new prompt string. */ 801void 802status_prompt_update(struct client *c, const char *msg) 803{ 804 xfree(c->prompt_string); 805 c->prompt_string = xstrdup(msg); 806 807 *c->prompt_buffer = '\0'; 808 c->prompt_index = 0; 809 810 c->prompt_hindex = 0; 811 812 c->flags |= CLIENT_STATUS; 813} 814 815/* Draw client prompt on status line of present else on last line. */ 816int 817status_prompt_redraw(struct client *c) 818{ 819 struct screen_write_ctx ctx; 820 struct session *s = c->session; 821 struct screen old_status; 822 size_t i, size, left, len, off; 823 struct grid_cell gc, *gcp; 824 int utf8flag; 825 826 if (c->tty.sx == 0 || c->tty.sy == 0) 827 return (0); 828 memcpy(&old_status, &c->status, sizeof old_status); 829 screen_init(&c->status, c->tty.sx, 1, 0); 830 831 utf8flag = options_get_number(&s->options, "status-utf8"); 832 833 len = screen_write_strlen(utf8flag, "%s", c->prompt_string); 834 if (len > c->tty.sx) 835 len = c->tty.sx; 836 off = 0; 837 838 memcpy(&gc, &grid_default_cell, sizeof gc); 839 colour_set_fg(&gc, options_get_number(&s->options, "message-fg")); 840 colour_set_bg(&gc, options_get_number(&s->options, "message-bg")); 841 gc.attr |= options_get_number(&s->options, "message-attr"); 842 843 screen_write_start(&ctx, NULL, &c->status); 844 845 screen_write_cursormove(&ctx, 0, 0); 846 screen_write_nputs(&ctx, len, &gc, utf8flag, "%s", c->prompt_string); 847 848 left = c->tty.sx - len; 849 if (left != 0) { 850 size = screen_write_strlen(utf8flag, "%s", c->prompt_buffer); 851 if (c->prompt_index >= left) { 852 off = c->prompt_index - left + 1; 853 if (c->prompt_index == size) 854 left--; 855 size = left; 856 } 857 screen_write_nputs( 858 &ctx, left, &gc, utf8flag, "%s", c->prompt_buffer + off); 859 860 for (i = len + size; i < c->tty.sx; i++) 861 screen_write_putc(&ctx, &gc, ' '); 862 } 863 864 screen_write_stop(&ctx); 865 866 /* Apply fake cursor. */ 867 off = len + c->prompt_index - off; 868 gcp = grid_view_get_cell(c->status.grid, off, 0); 869 gcp->attr ^= GRID_ATTR_REVERSE; 870 871 if (grid_compare(c->status.grid, old_status.grid) == 0) { 872 screen_free(&old_status); 873 return (0); 874 } 875 screen_free(&old_status); 876 return (1); 877} 878 879/* Handle keys in prompt. */ 880void 881status_prompt_key(struct client *c, int key) 882{ 883 struct paste_buffer *pb; 884 char *s, *first, *last, word[64], swapc; 885 u_char ch; 886 size_t size, n, off, idx; 887 888 size = strlen(c->prompt_buffer); 889 switch (mode_key_lookup(&c->prompt_mdata, key)) { 890 case MODEKEYEDIT_CURSORLEFT: 891 if (c->prompt_index > 0) { 892 c->prompt_index--; 893 c->flags |= CLIENT_STATUS; 894 } 895 break; 896 case MODEKEYEDIT_SWITCHMODEAPPEND: 897 case MODEKEYEDIT_CURSORRIGHT: 898 if (c->prompt_index < size) { 899 c->prompt_index++; 900 c->flags |= CLIENT_STATUS; 901 } 902 break; 903 case MODEKEYEDIT_STARTOFLINE: 904 if (c->prompt_index != 0) { 905 c->prompt_index = 0; 906 c->flags |= CLIENT_STATUS; 907 } 908 break; 909 case MODEKEYEDIT_ENDOFLINE: 910 if (c->prompt_index != size) { 911 c->prompt_index = size; 912 c->flags |= CLIENT_STATUS; 913 } 914 break; 915 case MODEKEYEDIT_COMPLETE: 916 if (*c->prompt_buffer == '\0') 917 break; 918 919 idx = c->prompt_index; 920 if (idx != 0) 921 idx--; 922 923 /* Find the word we are in. */ 924 first = c->prompt_buffer + idx; 925 while (first > c->prompt_buffer && *first != ' ') 926 first--; 927 while (*first == ' ') 928 first++; 929 last = c->prompt_buffer + idx; 930 while (*last != '\0' && *last != ' ') 931 last++; 932 while (*last == ' ') 933 last--; 934 if (*last != '\0') 935 last++; 936 if (last <= first || 937 ((size_t) (last - first)) > (sizeof word) - 1) 938 break; 939 memcpy(word, first, last - first); 940 word[last - first] = '\0'; 941 942 /* And try to complete it. */ 943 if ((s = status_prompt_complete(word)) == NULL) 944 break; 945 946 /* Trim out word. */ 947 n = size - (last - c->prompt_buffer) + 1; /* with \0 */ 948 memmove(first, last, n); 949 size -= last - first; 950 951 /* Insert the new word. */ 952 size += strlen(s); 953 off = first - c->prompt_buffer; 954 c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 1); 955 first = c->prompt_buffer + off; 956 memmove(first + strlen(s), first, n); 957 memcpy(first, s, strlen(s)); 958 959 c->prompt_index = (first - c->prompt_buffer) + strlen(s); 960 xfree(s); 961 962 c->flags |= CLIENT_STATUS; 963 break; 964 case MODEKEYEDIT_BACKSPACE: 965 if (c->prompt_index != 0) { 966 if (c->prompt_index == size) 967 c->prompt_buffer[--c->prompt_index] = '\0'; 968 else { 969 memmove(c->prompt_buffer + c->prompt_index - 1, 970 c->prompt_buffer + c->prompt_index, 971 size + 1 - c->prompt_index); 972 c->prompt_index--; 973 } 974 c->flags |= CLIENT_STATUS; 975 } 976 break; 977 case MODEKEYEDIT_DELETE: 978 if (c->prompt_index != size) { 979 memmove(c->prompt_buffer + c->prompt_index, 980 c->prompt_buffer + c->prompt_index + 1, 981 size + 1 - c->prompt_index); 982 c->flags |= CLIENT_STATUS; 983 } 984 break; 985 case MODEKEYEDIT_DELETELINE: 986 *c->prompt_buffer = '\0'; 987 c->prompt_index = 0; 988 c->flags |= CLIENT_STATUS; 989 break; 990 case MODEKEYEDIT_DELETETOENDOFLINE: 991 if (c->prompt_index < size) { 992 c->prompt_buffer[c->prompt_index] = '\0'; 993 c->flags |= CLIENT_STATUS; 994 } 995 break; 996 case MODEKEYEDIT_HISTORYUP: 997 if (ARRAY_LENGTH(&c->prompt_hdata) == 0) 998 break; 999 xfree(c->prompt_buffer); 1000 1001 c->prompt_buffer = xstrdup(ARRAY_ITEM(&c->prompt_hdata, 1002 ARRAY_LENGTH(&c->prompt_hdata) - 1 - c->prompt_hindex)); 1003 if (c->prompt_hindex != ARRAY_LENGTH(&c->prompt_hdata) - 1) 1004 c->prompt_hindex++; 1005 1006 c->prompt_index = strlen(c->prompt_buffer); 1007 c->flags |= CLIENT_STATUS; 1008 break; 1009 case MODEKEYEDIT_HISTORYDOWN: 1010 xfree(c->prompt_buffer); 1011 1012 if (c->prompt_hindex != 0) { 1013 c->prompt_hindex--; 1014 c->prompt_buffer = xstrdup(ARRAY_ITEM( 1015 &c->prompt_hdata, ARRAY_LENGTH( 1016 &c->prompt_hdata) - 1 - c->prompt_hindex)); 1017 } else 1018 c->prompt_buffer = xstrdup(""); 1019 1020 c->prompt_index = strlen(c->prompt_buffer); 1021 c->flags |= CLIENT_STATUS; 1022 break; 1023 case MODEKEYEDIT_PASTE: 1024 if ((pb = paste_get_top(&c->session->buffers)) == NULL) 1025 break; 1026 for (n = 0; n < pb->size; n++) { 1027 ch = (u_char) pb->data[n]; 1028 if (ch < 32 || ch == 127) 1029 break; 1030 } 1031 1032 c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + n + 1); 1033 if (c->prompt_index == size) { 1034 memcpy(c->prompt_buffer + c->prompt_index, pb->data, n); 1035 c->prompt_index += n; 1036 c->prompt_buffer[c->prompt_index] = '\0'; 1037 } else { 1038 memmove(c->prompt_buffer + c->prompt_index + n, 1039 c->prompt_buffer + c->prompt_index, 1040 size + 1 - c->prompt_index); 1041 memcpy(c->prompt_buffer + c->prompt_index, pb->data, n); 1042 c->prompt_index += n; 1043 } 1044 1045 c->flags |= CLIENT_STATUS; 1046 break; 1047 case MODEKEYEDIT_TRANSPOSECHARS: 1048 idx = c->prompt_index; 1049 if (idx < size) 1050 idx++; 1051 if (idx >= 2) { 1052 swapc = c->prompt_buffer[idx - 2]; 1053 c->prompt_buffer[idx - 2] = c->prompt_buffer[idx - 1]; 1054 c->prompt_buffer[idx - 1] = swapc; 1055 c->prompt_index = idx; 1056 c->flags |= CLIENT_STATUS; 1057 } 1058 break; 1059 case MODEKEYEDIT_ENTER: 1060 if (*c->prompt_buffer != '\0') 1061 status_prompt_add_history(c); 1062 if (c->prompt_callbackfn(c->prompt_data, c->prompt_buffer) == 0) 1063 status_prompt_clear(c); 1064 break; 1065 case MODEKEYEDIT_CANCEL: 1066 if (c->prompt_callbackfn(c->prompt_data, NULL) == 0) 1067 status_prompt_clear(c); 1068 break; 1069 case MODEKEY_OTHER: 1070 if (key < 32 || key == 127) 1071 break; 1072 c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 2); 1073 1074 if (c->prompt_index == size) { 1075 c->prompt_buffer[c->prompt_index++] = key; 1076 c->prompt_buffer[c->prompt_index] = '\0'; 1077 } else { 1078 memmove(c->prompt_buffer + c->prompt_index + 1, 1079 c->prompt_buffer + c->prompt_index, 1080 size + 1 - c->prompt_index); 1081 c->prompt_buffer[c->prompt_index++] = key; 1082 } 1083 1084 if (c->prompt_flags & PROMPT_SINGLE) { 1085 if (c->prompt_callbackfn( 1086 c->prompt_data, c->prompt_buffer) == 0) 1087 status_prompt_clear(c); 1088 } 1089 1090 c->flags |= CLIENT_STATUS; 1091 break; 1092 default: 1093 break; 1094 } 1095} 1096 1097/* Add line to the history. */ 1098void 1099status_prompt_add_history(struct client *c) 1100{ 1101 if (ARRAY_LENGTH(&c->prompt_hdata) > 0 && 1102 strcmp(ARRAY_LAST(&c->prompt_hdata), c->prompt_buffer) == 0) 1103 return; 1104 1105 if (ARRAY_LENGTH(&c->prompt_hdata) == PROMPT_HISTORY) { 1106 xfree(ARRAY_FIRST(&c->prompt_hdata)); 1107 ARRAY_REMOVE(&c->prompt_hdata, 0); 1108 } 1109 1110 ARRAY_ADD(&c->prompt_hdata, xstrdup(c->prompt_buffer)); 1111} 1112 1113/* Complete word. */ 1114char * 1115status_prompt_complete(const char *s) 1116{ 1117 const struct cmd_entry **cmdent; 1118 const struct set_option_entry *entry; 1119 ARRAY_DECL(, const char *) list; 1120 char *prefix, *s2; 1121 u_int i; 1122 size_t j; 1123 1124 if (*s == '\0') 1125 return (NULL); 1126 1127 /* First, build a list of all the possible matches. */ 1128 ARRAY_INIT(&list); 1129 for (cmdent = cmd_table; *cmdent != NULL; cmdent++) { 1130 if (strncmp((*cmdent)->name, s, strlen(s)) == 0) 1131 ARRAY_ADD(&list, (*cmdent)->name); 1132 } 1133 for (entry = set_session_option_table; entry->name != NULL; entry++) { 1134 if (strncmp(entry->name, s, strlen(s)) == 0) 1135 ARRAY_ADD(&list, entry->name); 1136 } 1137 for (entry = set_window_option_table; entry->name != NULL; entry++) { 1138 if (strncmp(entry->name, s, strlen(s)) == 0) 1139 ARRAY_ADD(&list, entry->name); 1140 } 1141 1142 /* If none, bail now. */ 1143 if (ARRAY_LENGTH(&list) == 0) { 1144 ARRAY_FREE(&list); 1145 return (NULL); 1146 } 1147 1148 /* If an exact match, return it, with a trailing space. */ 1149 if (ARRAY_LENGTH(&list) == 1) { 1150 xasprintf(&s2, "%s ", ARRAY_FIRST(&list)); 1151 ARRAY_FREE(&list); 1152 return (s2); 1153 } 1154 1155 /* Now loop through the list and find the longest common prefix. */ 1156 prefix = xstrdup(ARRAY_FIRST(&list)); 1157 for (i = 1; i < ARRAY_LENGTH(&list); i++) { 1158 s = ARRAY_ITEM(&list, i); 1159 1160 j = strlen(s); 1161 if (j > strlen(prefix)) 1162 j = strlen(prefix); 1163 for (; j > 0; j--) { 1164 if (prefix[j - 1] != s[j - 1]) 1165 prefix[j - 1] = '\0'; 1166 } 1167 } 1168 1169 ARRAY_FREE(&list); 1170 return (prefix); 1171} 1172