Annotation of src/usr.bin/tmux/window.c, Revision 1.1
1.1 ! nicm 1: /* $OpenBSD$ */
! 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/ioctl.h>
! 21:
! 22: #include <errno.h>
! 23: #include <fcntl.h>
! 24: #include <paths.h>
! 25: #include <signal.h>
! 26: #include <stdint.h>
! 27: #include <stdlib.h>
! 28: #include <string.h>
! 29: #include <termios.h>
! 30: #include <unistd.h>
! 31: #include <util.h>
! 32:
! 33: #include "tmux.h"
! 34:
! 35: /*
! 36: * Each window is attached to one or two panes, each of which is a pty. This
! 37: * file contains code to handle them.
! 38: *
! 39: * A pane has two buffers attached, these are filled and emptied by the main
! 40: * server poll loop. Output data is received from pty's in screen format,
! 41: * translated and returned as a series of escape sequences and strings via
! 42: * input_parse (in input.c). Input data is received as key codes and written
! 43: * directly via input_key.
! 44: *
! 45: * Each pane also has a "virtual" screen (screen.c) which contains the current
! 46: * state and is redisplayed when the window is reattached to a client.
! 47: *
! 48: * Windows are stored directly on a global array and wrapped in any number of
! 49: * winlink structs to be linked onto local session RB trees. A reference count
! 50: * is maintained and a window removed from the global list and destroyed when
! 51: * it reaches zero.
! 52: */
! 53:
! 54: /* Global window list. */
! 55: struct windows windows;
! 56:
! 57: RB_GENERATE(winlinks, winlink, entry, winlink_cmp);
! 58:
! 59: int
! 60: winlink_cmp(struct winlink *wl1, struct winlink *wl2)
! 61: {
! 62: return (wl1->idx - wl2->idx);
! 63: }
! 64:
! 65: struct winlink *
! 66: winlink_find_by_index(struct winlinks *wwl, int idx)
! 67: {
! 68: struct winlink wl;
! 69:
! 70: if (idx < 0)
! 71: fatalx("bad index");
! 72:
! 73: wl.idx = idx;
! 74: return (RB_FIND(winlinks, wwl, &wl));
! 75: }
! 76:
! 77: int
! 78: winlink_next_index(struct winlinks *wwl)
! 79: {
! 80: u_int i;
! 81:
! 82: for (i = 0; i < INT_MAX; i++) {
! 83: if (winlink_find_by_index(wwl, i) == NULL)
! 84: return (i);
! 85: }
! 86:
! 87: fatalx("no free indexes");
! 88: }
! 89:
! 90: u_int
! 91: winlink_count(struct winlinks *wwl)
! 92: {
! 93: struct winlink *wl;
! 94: u_int n;
! 95:
! 96: n = 0;
! 97: RB_FOREACH(wl, winlinks, wwl)
! 98: n++;
! 99:
! 100: return (n);
! 101: }
! 102:
! 103: struct winlink *
! 104: winlink_add(struct winlinks *wwl, struct window *w, int idx)
! 105: {
! 106: struct winlink *wl;
! 107:
! 108: if (idx == -1)
! 109: idx = winlink_next_index(wwl);
! 110: else if (winlink_find_by_index(wwl, idx) != NULL)
! 111: return (NULL);
! 112:
! 113: if (idx < 0)
! 114: fatalx("bad index");
! 115:
! 116: wl = xcalloc(1, sizeof *wl);
! 117: wl->idx = idx;
! 118: wl->window = w;
! 119: RB_INSERT(winlinks, wwl, wl);
! 120:
! 121: w->references++;
! 122:
! 123: return (wl);
! 124: }
! 125:
! 126: void
! 127: winlink_remove(struct winlinks *wwl, struct winlink *wl)
! 128: {
! 129: struct window *w = wl->window;
! 130:
! 131: RB_REMOVE(winlinks, wwl, wl);
! 132: xfree(wl);
! 133:
! 134: if (w->references == 0)
! 135: fatal("bad reference count");
! 136: w->references--;
! 137: if (w->references == 0)
! 138: window_destroy(w);
! 139: }
! 140:
! 141: struct winlink *
! 142: winlink_next(unused struct winlinks *wwl, struct winlink *wl)
! 143: {
! 144: return (RB_NEXT(winlinks, wwl, wl));
! 145: }
! 146:
! 147: struct winlink *
! 148: winlink_previous(unused struct winlinks *wwl, struct winlink *wl)
! 149: {
! 150: return (RB_PREV(winlinks, wwl, wl));
! 151: }
! 152:
! 153: void
! 154: winlink_stack_push(struct winlink_stack *stack, struct winlink *wl)
! 155: {
! 156: if (wl == NULL)
! 157: return;
! 158:
! 159: winlink_stack_remove(stack, wl);
! 160: SLIST_INSERT_HEAD(stack, wl, sentry);
! 161: }
! 162:
! 163: void
! 164: winlink_stack_remove(struct winlink_stack *stack, struct winlink *wl)
! 165: {
! 166: struct winlink *wl2;
! 167:
! 168: if (wl == NULL)
! 169: return;
! 170:
! 171: SLIST_FOREACH(wl2, stack, sentry) {
! 172: if (wl2 == wl) {
! 173: SLIST_REMOVE(stack, wl, winlink, sentry);
! 174: return;
! 175: }
! 176: }
! 177: }
! 178:
! 179: int
! 180: window_index(struct window *s, u_int *i)
! 181: {
! 182: for (*i = 0; *i < ARRAY_LENGTH(&windows); (*i)++) {
! 183: if (s == ARRAY_ITEM(&windows, *i))
! 184: return (0);
! 185: }
! 186: return (-1);
! 187: }
! 188:
! 189: struct window *
! 190: window_create1(u_int sx, u_int sy)
! 191: {
! 192: struct window *w;
! 193: u_int i;
! 194:
! 195: w = xmalloc(sizeof *w);
! 196: w->name = NULL;
! 197: w->flags = 0;
! 198:
! 199: TAILQ_INIT(&w->panes);
! 200: w->active = NULL;
! 201: w->layout = 0;
! 202:
! 203: w->sx = sx;
! 204: w->sy = sy;
! 205:
! 206: options_init(&w->options, &global_window_options);
! 207:
! 208: for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
! 209: if (ARRAY_ITEM(&windows, i) == NULL) {
! 210: ARRAY_SET(&windows, i, w);
! 211: break;
! 212: }
! 213: }
! 214: if (i == ARRAY_LENGTH(&windows))
! 215: ARRAY_ADD(&windows, w);
! 216: w->references = 0;
! 217:
! 218: return (w);
! 219: }
! 220:
! 221: struct window *
! 222: window_create(const char *name, const char *cmd, const char *cwd,
! 223: const char **envp, u_int sx, u_int sy, u_int hlimit, char **cause)
! 224: {
! 225: struct window *w;
! 226:
! 227: w = window_create1(sx, sy);
! 228: if (window_add_pane(w, -1, cmd, cwd, envp, hlimit, cause) == NULL) {
! 229: window_destroy(w);
! 230: return (NULL);
! 231: }
! 232: w->active = TAILQ_FIRST(&w->panes);
! 233:
! 234: if (name != NULL) {
! 235: w->name = xstrdup(name);
! 236: options_set_number(&w->options, "automatic-rename", 0);
! 237: } else
! 238: w->name = default_window_name(w);
! 239: return (w);
! 240: }
! 241:
! 242: void
! 243: window_destroy(struct window *w)
! 244: {
! 245: u_int i;
! 246:
! 247: if (window_index(w, &i) != 0)
! 248: fatalx("index not found");
! 249: ARRAY_SET(&windows, i, NULL);
! 250: while (!ARRAY_EMPTY(&windows) && ARRAY_LAST(&windows) == NULL)
! 251: ARRAY_TRUNC(&windows, 1);
! 252:
! 253: options_free(&w->options);
! 254:
! 255: window_destroy_panes(w);
! 256:
! 257: if (w->name != NULL)
! 258: xfree(w->name);
! 259: xfree(w);
! 260: }
! 261:
! 262: int
! 263: window_resize(struct window *w, u_int sx, u_int sy)
! 264: {
! 265: w->sx = sx;
! 266: w->sy = sy;
! 267:
! 268: return (0);
! 269: }
! 270:
! 271: void
! 272: window_set_active_pane(struct window *w, struct window_pane *wp)
! 273: {
! 274: w->active = wp;
! 275: while (w->active->flags & PANE_HIDDEN)
! 276: w->active = TAILQ_PREV(w->active, window_panes, entry);
! 277: }
! 278:
! 279: struct window_pane *
! 280: window_add_pane(struct window *w, int wanty, const char *cmd,
! 281: const char *cwd, const char **envp, u_int hlimit, char **cause)
! 282: {
! 283: struct window_pane *wp;
! 284: u_int sizey;
! 285:
! 286: if (TAILQ_EMPTY(&w->panes))
! 287: wanty = w->sy;
! 288: else {
! 289: sizey = w->active->sy - 1; /* for separator */
! 290: if (sizey < PANE_MINIMUM * 2) {
! 291: *cause = xstrdup("pane too small");
! 292: return (NULL);
! 293: }
! 294:
! 295: if (wanty == -1)
! 296: wanty = sizey / 2;
! 297:
! 298: if (wanty < PANE_MINIMUM)
! 299: wanty = PANE_MINIMUM;
! 300: if ((u_int) wanty > sizey - PANE_MINIMUM)
! 301: wanty = sizey - PANE_MINIMUM;
! 302:
! 303: window_pane_resize(w->active, w->sx, sizey - wanty);
! 304: }
! 305:
! 306: wp = window_pane_create(w, w->sx, wanty, hlimit);
! 307: if (TAILQ_EMPTY(&w->panes))
! 308: TAILQ_INSERT_HEAD(&w->panes, wp, entry);
! 309: else
! 310: TAILQ_INSERT_AFTER(&w->panes, w->active, wp, entry);
! 311: if (window_pane_spawn(wp, cmd, cwd, envp, cause) != 0) {
! 312: window_remove_pane(w, wp);
! 313: return (NULL);
! 314: }
! 315: return (wp);
! 316: }
! 317:
! 318: void
! 319: window_remove_pane(struct window *w, struct window_pane *wp)
! 320: {
! 321: w->active = TAILQ_PREV(wp, window_panes, entry);
! 322: if (w->active == NULL)
! 323: w->active = TAILQ_NEXT(wp, entry);
! 324:
! 325: TAILQ_REMOVE(&w->panes, wp, entry);
! 326: window_pane_destroy(wp);
! 327: }
! 328:
! 329: u_int
! 330: window_index_of_pane(struct window *w, struct window_pane *find)
! 331: {
! 332: struct window_pane *wp;
! 333: u_int n;
! 334:
! 335: n = 0;
! 336: TAILQ_FOREACH(wp, &w->panes, entry) {
! 337: if (wp == find)
! 338: return (n);
! 339: n++;
! 340: }
! 341: fatalx("unknown pane");
! 342: }
! 343:
! 344: struct window_pane *
! 345: window_pane_at_index(struct window *w, u_int idx)
! 346: {
! 347: struct window_pane *wp;
! 348: u_int n;
! 349:
! 350: n = 0;
! 351: TAILQ_FOREACH(wp, &w->panes, entry) {
! 352: if (n == idx)
! 353: return (wp);
! 354: n++;
! 355: }
! 356: return (NULL);
! 357: }
! 358:
! 359: u_int
! 360: window_count_panes(struct window *w)
! 361: {
! 362: struct window_pane *wp;
! 363: u_int n;
! 364:
! 365: n = 0;
! 366: TAILQ_FOREACH(wp, &w->panes, entry)
! 367: n++;
! 368: return (n);
! 369: }
! 370:
! 371: void
! 372: window_destroy_panes(struct window *w)
! 373: {
! 374: struct window_pane *wp;
! 375:
! 376: while (!TAILQ_EMPTY(&w->panes)) {
! 377: wp = TAILQ_FIRST(&w->panes);
! 378: TAILQ_REMOVE(&w->panes, wp, entry);
! 379: window_pane_destroy(wp);
! 380: }
! 381: }
! 382:
! 383: struct window_pane *
! 384: window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
! 385: {
! 386: struct window_pane *wp;
! 387:
! 388: wp = xcalloc(1, sizeof *wp);
! 389: wp->window = w;
! 390:
! 391: wp->cmd = NULL;
! 392: wp->cwd = NULL;
! 393:
! 394: wp->fd = -1;
! 395: wp->in = buffer_create(BUFSIZ);
! 396: wp->out = buffer_create(BUFSIZ);
! 397:
! 398: wp->mode = NULL;
! 399:
! 400: wp->xoff = 0;
! 401: wp->yoff = 0;
! 402:
! 403: wp->sx = sx;
! 404: wp->sy = sy;
! 405:
! 406: screen_init(&wp->base, sx, sy, hlimit);
! 407: wp->screen = &wp->base;
! 408:
! 409: input_init(wp);
! 410:
! 411: return (wp);
! 412: }
! 413:
! 414: void
! 415: window_pane_destroy(struct window_pane *wp)
! 416: {
! 417: if (wp->fd != -1)
! 418: close(wp->fd);
! 419:
! 420: input_free(wp);
! 421:
! 422: window_pane_reset_mode(wp);
! 423: screen_free(&wp->base);
! 424:
! 425: buffer_destroy(wp->in);
! 426: buffer_destroy(wp->out);
! 427:
! 428: if (wp->cwd != NULL)
! 429: xfree(wp->cwd);
! 430: if (wp->cmd != NULL)
! 431: xfree(wp->cmd);
! 432: xfree(wp);
! 433: }
! 434:
! 435: int
! 436: window_pane_spawn(struct window_pane *wp,
! 437: const char *cmd, const char *cwd, const char **envp, char **cause)
! 438: {
! 439: struct winsize ws;
! 440: int mode;
! 441: const char **envq;
! 442: struct timeval tv;
! 443:
! 444: if (wp->fd != -1)
! 445: close(wp->fd);
! 446: if (cmd != NULL) {
! 447: if (wp->cmd != NULL)
! 448: xfree(wp->cmd);
! 449: wp->cmd = xstrdup(cmd);
! 450: }
! 451: if (cwd != NULL) {
! 452: if (wp->cwd != NULL)
! 453: xfree(wp->cwd);
! 454: wp->cwd = xstrdup(cwd);
! 455: }
! 456:
! 457: memset(&ws, 0, sizeof ws);
! 458: ws.ws_col = screen_size_x(&wp->base);
! 459: ws.ws_row = screen_size_y(&wp->base);
! 460:
! 461: if (gettimeofday(&wp->window->name_timer, NULL) != 0)
! 462: fatal("gettimeofday");
! 463: tv.tv_sec = 0;
! 464: tv.tv_usec = NAME_INTERVAL * 1000L;
! 465: timeradd(&wp->window->name_timer, &tv, &wp->window->name_timer);
! 466:
! 467: switch (wp->pid = forkpty(&wp->fd, wp->tty, NULL, &ws)) {
! 468: case -1:
! 469: wp->fd = -1;
! 470: xasprintf(cause, "%s: %s", cmd, strerror(errno));
! 471: return (-1);
! 472: case 0:
! 473: if (chdir(wp->cwd) != 0)
! 474: chdir("/");
! 475: for (envq = envp; *envq != NULL; envq++) {
! 476: if (putenv((char *) *envq) != 0)
! 477: fatal("putenv failed");
! 478: }
! 479: sigreset();
! 480: log_close();
! 481:
! 482: execl(_PATH_BSHELL, "sh", "-c", wp->cmd, (char *) NULL);
! 483: fatal("execl failed");
! 484: }
! 485:
! 486: if ((mode = fcntl(wp->fd, F_GETFL)) == -1)
! 487: fatal("fcntl failed");
! 488: if (fcntl(wp->fd, F_SETFL, mode|O_NONBLOCK) == -1)
! 489: fatal("fcntl failed");
! 490: if (fcntl(wp->fd, F_SETFD, FD_CLOEXEC) == -1)
! 491: fatal("fcntl failed");
! 492:
! 493: return (0);
! 494: }
! 495:
! 496: int
! 497: window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
! 498: {
! 499: struct winsize ws;
! 500:
! 501: if (sx == wp->sx && sy == wp->sy)
! 502: return (-1);
! 503: wp->sx = sx;
! 504: wp->sy = sy;
! 505:
! 506: memset(&ws, 0, sizeof ws);
! 507: ws.ws_col = sx;
! 508: ws.ws_row = sy;
! 509:
! 510: screen_resize(&wp->base, sx, sy);
! 511: if (wp->mode != NULL)
! 512: wp->mode->resize(wp, sx, sy);
! 513:
! 514: if (wp->fd != -1 && ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
! 515: fatal("ioctl failed");
! 516: return (0);
! 517: }
! 518:
! 519: int
! 520: window_pane_set_mode(struct window_pane *wp, const struct window_mode *mode)
! 521: {
! 522: struct screen *s;
! 523:
! 524: if (wp->mode != NULL || wp->mode == mode)
! 525: return (1);
! 526:
! 527: wp->mode = mode;
! 528:
! 529: if ((s = wp->mode->init(wp)) != NULL)
! 530: wp->screen = s;
! 531: server_redraw_window(wp->window);
! 532: return (0);
! 533: }
! 534:
! 535: void
! 536: window_pane_reset_mode(struct window_pane *wp)
! 537: {
! 538: if (wp->mode == NULL)
! 539: return;
! 540:
! 541: wp->mode->free(wp);
! 542: wp->mode = NULL;
! 543:
! 544: wp->screen = &wp->base;
! 545: server_redraw_window(wp->window);
! 546: }
! 547:
! 548: void
! 549: window_pane_parse(struct window_pane *wp)
! 550: {
! 551: input_parse(wp);
! 552: }
! 553:
! 554: void
! 555: window_pane_key(struct window_pane *wp, struct client *c, int key)
! 556: {
! 557: if (wp->mode != NULL) {
! 558: if (wp->mode->key != NULL)
! 559: wp->mode->key(wp, c, key);
! 560: } else
! 561: input_key(wp, key);
! 562: }
! 563:
! 564: void
! 565: window_pane_mouse(
! 566: struct window_pane *wp, struct client *c, u_char b, u_char x, u_char y)
! 567: {
! 568: /* XXX convert from 1-based? */
! 569:
! 570: if (x < wp->xoff || x >= wp->xoff + wp->sx)
! 571: return;
! 572: if (y < wp->yoff || y >= wp->yoff + wp->sy)
! 573: return;
! 574: x -= wp->xoff;
! 575: y -= wp->yoff;
! 576:
! 577: if (wp->mode != NULL) {
! 578: if (wp->mode->mouse != NULL)
! 579: wp->mode->mouse(wp, c, b, x, y);
! 580: } else
! 581: input_mouse(wp, b, x, y);
! 582: }
! 583:
! 584: char *
! 585: window_pane_search(struct window_pane *wp, const char *searchstr)
! 586: {
! 587: const struct grid_cell *gc;
! 588: const struct grid_utf8 *gu;
! 589: char *buf, *s;
! 590: size_t off;
! 591: u_int i, j, k;
! 592:
! 593: buf = xmalloc(1);
! 594:
! 595: for (j = 0; j < screen_size_y(&wp->base); j++) {
! 596: off = 0;
! 597: for (i = 0; i < screen_size_x(&wp->base); i++) {
! 598: gc = grid_view_peek_cell(wp->base.grid, i, j);
! 599: if (gc->flags & GRID_FLAG_UTF8) {
! 600: gu = grid_view_peek_utf8(wp->base.grid, i, j);
! 601: buf = xrealloc(buf, 1, off + 8);
! 602: for (k = 0; k < UTF8_SIZE; k++) {
! 603: if (gu->data[k] == 0xff)
! 604: break;
! 605: buf[off++] = gu->data[k];
! 606: }
! 607: } else {
! 608: buf = xrealloc(buf, 1, off + 1);
! 609: buf[off++] = gc->data;
! 610: }
! 611: }
! 612: while (off > 0 && buf[off - 1] == ' ')
! 613: off--;
! 614: buf[off] = '\0';
! 615:
! 616: if ((s = strstr(buf, searchstr)) != NULL) {
! 617: s = section_string(buf, off, s - buf, 40);
! 618: xfree(buf);
! 619: return (s);
! 620: }
! 621: }
! 622:
! 623: xfree(buf);
! 624: return (NULL);
! 625: }
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