resize.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20
  21 #include <string.h>
  22
  23 #include "tmux.h"
  24
  25 void
  26 resize_window(struct window *w, u_int sx, u_int sy, int xpixel, int ypixel)
  27 {
  28         int     zoomed;
  29
  30         /* Check size limits. */
  31         if (sx < WINDOW_MINIMUM)
  32                 sx = WINDOW_MINIMUM;
  33         if (sx > WINDOW_MAXIMUM)
  34                 sx = WINDOW_MAXIMUM;
  35         if (sy < WINDOW_MINIMUM)
  36                 sy = WINDOW_MINIMUM;
  37         if (sy > WINDOW_MAXIMUM)
  38                 sy = WINDOW_MAXIMUM;
  39
  40         /* If the window is zoomed, unzoom. */
  41         zoomed = w->flags & WINDOW_ZOOMED;
  42         if (zoomed)
  43                 window_unzoom(w);
  44
  45         /* Resize the layout first. */
  46         layout_resize(w, sx, sy);
  47
  48         /* Resize the window, it can be no smaller than the layout. */
  49         if (sx < w->layout_root->sx)
  50                 sx = w->layout_root->sx;
  51         if (sy < w->layout_root->sy)
  52                 sy = w->layout_root->sy;
  53         window_resize(w, sx, sy, xpixel, ypixel);
  54         log_debug("%s: @%u resized to %ux%u; layout %ux%u", __func__, w->id,
  55             sx, sy, w->layout_root->sx, w->layout_root->sy);
  56
  57         /* Restore the window zoom state. */
  58         if (zoomed)
  59                 window_zoom(w->active);
  60
  61         tty_update_window_offset(w);
  62         server_redraw_window(w);
  63         notify_window("window-layout-changed", w);
  64         w->flags &= ~WINDOW_RESIZE;
  65 }
  66
  67 static int
  68 ignore_client_size(struct client *c)
  69 {
  70         struct client   *loop;
  71
  72         if (c->session == NULL)
  73                 return (1);
  74         if (c->flags & CLIENT_NOSIZEFLAGS)
  75                 return (1);
  76         if (c->flags & CLIENT_IGNORESIZE) {
  77                 /*
  78                  * Ignore flagged clients if there are any attached clients
  79                  * that aren't flagged.
  80                  */
  81                 TAILQ_FOREACH (loop, &clients, entry) {
  82                         if (loop->session == NULL)
  83                                 continue;
  84                         if (loop->flags & CLIENT_NOSIZEFLAGS)
  85                                 continue;
  86                         if (~loop->flags & CLIENT_IGNORESIZE)
  87                                 return (1);
  88                 }
  89         }
  90         if ((c->flags & CLIENT_CONTROL) &&
  91             (~c->flags & CLIENT_SIZECHANGED) &&
  92             (~c->flags & CLIENT_WINDOWSIZECHANGED))
  93                 return (1);
  94         return (0);
  95 }
  96
  97 static u_int
  98 clients_with_window(struct window *w)
  99 {
 100         struct client   *loop;
 101         u_int            n = 0;
 102
 103         TAILQ_FOREACH(loop, &clients, entry) {
 104                 if (ignore_client_size(loop) || !session_has(loop->session, w))
 105                         continue;
 106                 if (++n > 1)
 107                         break;
 108         }
 109         return (n);
 110 }
 111
 112 static int
 113 clients_calculate_size(int type, int current, struct client *c,
 114     struct session *s, struct window *w, int (*skip_client)(struct client *,
 115     int, int, struct session *, struct window *), u_int *sx, u_int *sy,
 116     u_int *xpixel, u_int *ypixel)
 117 {
 118         struct client           *loop;
 119         struct client_window    *cw;
 120         u_int                    cx, cy, n = 0;
 121
 122         /*
 123          * Start comparing with 0 for largest and UINT_MAX for smallest or
 124          * latest.
 125          */
 126         if (type == WINDOW_SIZE_LARGEST) {
 127                 *sx = 0;
 128                 *sy = 0;
 129         } else if (type == WINDOW_SIZE_MANUAL) {
 130                 *sx = w->manual_sx;
 131                 *sy = w->manual_sy;
 132                 log_debug("%s: manual size %ux%u", __func__, *sx, *sy);
 133         } else {
 134                 *sx = UINT_MAX;
 135                 *sy = UINT_MAX;
 136         }
 137         *xpixel = *ypixel = 0;
 138
 139         /*
 140          * For latest, count the number of clients with this window. We only
 141          * care if there is more than one.
 142          */
 143         if (type == WINDOW_SIZE_LATEST && w != NULL)
 144                 n = clients_with_window(w);
 145
 146         /* Skip setting the size if manual */
 147         if (type == WINDOW_SIZE_MANUAL)
 148                 goto skip;
 149
 150         /* Loop over the clients and work out the size. */
 151         TAILQ_FOREACH(loop, &clients, entry) {
 152                 if (loop != c && ignore_client_size(loop)) {
 153                         log_debug("%s: ignoring %s (1)", __func__, loop->name);
 154                         continue;
 155                 }
 156                 if (loop != c && skip_client(loop, type, current, s, w)) {
 157                         log_debug("%s: skipping %s (1)", __func__, loop->name);
 158                         continue;
 159                 }
 160
 161                 /*
 162                  * If there are multiple clients attached, only accept the
 163                  * latest client; otherwise let the only client be chosen as
 164                  * for smallest.
 165                  */
 166                 if (type == WINDOW_SIZE_LATEST && n > 1 && loop != w->latest) {
 167                         log_debug("%s: %s is not latest", __func__, loop->name);
 168                         continue;
 169                 }
 170
 171                 /*
 172                  * If the client has a per-window size, use this instead if it is
 173                  * smaller.
 174                  */
 175                 if (w != NULL)
 176                         cw = server_client_get_client_window(loop, w->id);
 177                 else
 178                         cw = NULL;
 179
 180                 /* Work out this client's size. */
 181                 if (cw != NULL && cw->sx != 0 && cw->sy != 0) {
 182                         cx = cw->sx;
 183                         cy = cw->sy;
 184                 } else {
 185                         cx = loop->tty.sx;
 186                         cy = loop->tty.sy - status_line_size(loop);
 187                 }
 188
 189                 /*
 190                  * If it is larger or smaller than the best so far, update the
 191                  * new size.
 192                  */
 193                 if (type == WINDOW_SIZE_LARGEST) {
 194                         if (cx > *sx)
 195                                 *sx = cx;
 196                         if (cy > *sy)
 197                                 *sy = cy;
 198                 } else {
 199                         if (cx < *sx)
 200                                 *sx = cx;
 201                         if (cy < *sy)
 202                                 *sy = cy;
 203                 }
 204                 if (loop->tty.xpixel > *xpixel && loop->tty.ypixel > *ypixel) {
 205                         *xpixel = loop->tty.xpixel;
 206                         *ypixel = loop->tty.ypixel;
 207                 }
 208                 log_debug("%s: after %s (%ux%u), size is %ux%u", __func__,
 209                     loop->name, cx, cy, *sx, *sy);
 210         }
 211         if (*sx != UINT_MAX && *sy != UINT_MAX)
 212                 log_debug("%s: calculated size %ux%u", __func__, *sx, *sy);
 213         else
 214                 log_debug("%s: no calculated size", __func__);
 215
 216 skip:
 217         /*
 218          * Do not allow any size to be larger than the per-client window size
 219          * if one exists.
 220          */
 221         if (w != NULL) {
 222                 TAILQ_FOREACH(loop, &clients, entry) {
 223                         if (loop != c && ignore_client_size(loop))
 224                                 continue;
 225                         if (loop != c && skip_client(loop, type, current, s, w))
 226                                 continue;
 227
 228                         /* Look up per-window size if any. */
 229                         if (~loop->flags & CLIENT_WINDOWSIZECHANGED)
 230                                 continue;
 231                         cw = server_client_get_client_window(loop, w->id);
 232                         if (cw == NULL)
 233                                 continue;
 234
 235                         /* Clamp the size. */
 236                         log_debug("%s: %s size for @%u is %ux%u", __func__,
 237                             loop->name, w->id, cw->sx, cw->sy);
 238                         if (cw->sx != 0 && *sx > cw->sx)
 239                                 *sx = cw->sx;
 240                         if (cw->sy != 0 && *sy > cw->sy)
 241                                 *sy = cw->sy;
 242                 }
 243         }
 244         if (*sx != UINT_MAX && *sy != UINT_MAX)
 245                 log_debug("%s: calculated size %ux%u", __func__, *sx, *sy);
 246         else
 247                 log_debug("%s: no calculated size", __func__);
 248
 249         /* Return whether a suitable size was found. */
 250         if (type == WINDOW_SIZE_MANUAL) {
 251                 log_debug("%s: type is manual", __func__);
 252                 return (1);
 253         }
 254         if (type == WINDOW_SIZE_LARGEST) {
 255                 log_debug("%s: type is largest", __func__);
 256                 return (*sx != 0 && *sy != 0);
 257         }
 258         if (type == WINDOW_SIZE_LATEST)
 259                 log_debug("%s: type is latest", __func__);
 260         else
 261                 log_debug("%s: type is smallest", __func__);
 262         return (*sx != UINT_MAX && *sy != UINT_MAX);
 263 }
 264
 265 static int
 266 default_window_size_skip_client(struct client *loop, int type,
 267     __unused int current, struct session *s, struct window *w)
 268 {
 269         /*
 270          * Latest checks separately, so do not check here. Otherwise only
 271          * include clients where the session contains the window or where the
 272          * session is the given session.
 273          */
 274         if (type == WINDOW_SIZE_LATEST)
 275                 return (0);
 276         if (w != NULL && !session_has(loop->session, w))
 277                 return (1);
 278         if (w == NULL && loop->session != s)
 279                 return (1);
 280         return (0);
 281 }
 282
 283 void
 284 default_window_size(struct client *c, struct session *s, struct window *w,
 285         u_int *sx, u_int *sy, u_int *xpixel, u_int *ypixel, int type)
 286 {
 287         const char      *value;
 288
 289         /* Get type if not provided. */
 290         if (type == -1)
 291                 type = options_get_number(global_w_options, "window-size");
 292
 293         /*
 294          * Latest clients can use the given client if suitable. If there is no
 295          * client and no window, use the default size as for manual type.
 296          */
 297         if (type == WINDOW_SIZE_LATEST && c != NULL && !ignore_client_size(c)) {
 298                 *sx = c->tty.sx;
 299                 *sy = c->tty.sy - status_line_size(c);
 300                 *xpixel = c->tty.xpixel;
 301                 *ypixel = c->tty.ypixel;
 302                 log_debug("%s: using %ux%u from %s", __func__, *sx, *sy,
 303                     c->name);
 304                 goto done;
 305         }
 306
 307         /*
 308          * Ignore the given client if it is a control client - the creating
 309          * client should only affect the size if it is not a control client.
 310          */
 311         if (c != NULL && (c->flags & CLIENT_CONTROL))
 312                 c = NULL;
 313
 314         /*
 315          * Look for a client to base the size on. If none exists (or the type
 316          * is manual), use the default-size option.
 317          */
 318         if (!clients_calculate_size(type, 0, c, s, w,
 319             default_window_size_skip_client, sx, sy, xpixel, ypixel)) {
 320                 value = options_get_string(s->options, "default-size");
 321                 if (sscanf(value, "%ux%u", sx, sy) != 2) {
 322                         *sx = 80;
 323                         *sy = 24;
 324                 }
 325                 log_debug("%s: using %ux%u from default-size", __func__, *sx,
 326                     *sy);
 327         }
 328
 329 done:
 330         /* Make sure the limits are enforced. */
 331         if (*sx < WINDOW_MINIMUM)
 332                 *sx = WINDOW_MINIMUM;
 333         if (*sx > WINDOW_MAXIMUM)
 334                 *sx = WINDOW_MAXIMUM;
 335         if (*sy < WINDOW_MINIMUM)
 336                 *sy = WINDOW_MINIMUM;
 337         if (*sy > WINDOW_MAXIMUM)
 338                 *sy = WINDOW_MAXIMUM;
 339         log_debug("%s: resulting size is %ux%u", __func__, *sx, *sy);
 340 }
 341
 342 static int
 343 recalculate_size_skip_client(struct client *loop, __unused int type,
 344     int current, __unused struct session *s, struct window *w)
 345 {
 346         /*
 347          * If the current flag is set, then skip any client where this window
 348          * is not the current window - this is used for aggressive-resize.
 349          * Otherwise skip any session that doesn't contain the window.
 350          */
 351         if (loop->session->curw == NULL)
 352                 return (1);
 353         if (current)
 354                 return (loop->session->curw->window != w);
 355         return (session_has(loop->session, w) == 0);
 356 }
 357
 358 void
 359 recalculate_size(struct window *w, int now)
 360 {
 361         u_int   sx, sy, xpixel = 0, ypixel = 0;
 362         int     type, current, changed;
 363
 364         /*
 365          * Do not attempt to resize windows which have no pane, they must be on
 366          * the way to destruction.
 367          */
 368         if (w->active == NULL)
 369                 return;
 370         log_debug("%s: @%u is %ux%u", __func__, w->id, w->sx, w->sy);
 371
 372         /*
 373          * Type is manual, smallest, largest, latest. Current is the
 374          * aggressive-resize option (do not resize based on clients where the
 375          * window is not the current window).
 376          */
 377         type = options_get_number(w->options, "window-size");
 378         current = options_get_number(w->options, "aggressive-resize");
 379
 380         /* Look for a suitable client and get the new size. */
 381         changed = clients_calculate_size(type, current, NULL, NULL, w,
 382             recalculate_size_skip_client, &sx, &sy, &xpixel, &ypixel);
 383
 384         /*
 385          * Make sure the size has actually changed. If the window has already
 386          * got a resize scheduled, then use the new size; otherwise the old.
 387          */
 388         if (w->flags & WINDOW_RESIZE) {
 389                 if (!now && changed && w->new_sx == sx && w->new_sy == sy)
 390                         changed = 0;
 391         } else {
 392                 if (!now && changed && w->sx == sx && w->sy == sy)
 393                         changed = 0;
 394         }
 395
 396         /*
 397          * If the size hasn't changed, update the window offset but not the
 398          * size.
 399          */
 400         if (!changed) {
 401                 log_debug("%s: @%u no size change", __func__, w->id);
 402                 tty_update_window_offset(w);
 403                 return;
 404         }
 405
 406         /*
 407          * If the now flag is set or if the window is sized manually, change
 408          * the size immediately. Otherwise set the flag and it will be done
 409          * later.
 410          */
 411         log_debug("%s: @%u new size %ux%u", __func__, w->id, sx, sy);
 412         if (now || type == WINDOW_SIZE_MANUAL)
 413                 resize_window(w, sx, sy, xpixel, ypixel);
 414         else {
 415                 w->new_sx = sx;
 416                 w->new_sy = sy;
 417                 w->new_xpixel = xpixel;
 418                 w->new_ypixel = ypixel;
 419
 420                 w->flags |= WINDOW_RESIZE;
 421                 tty_update_window_offset(w);
 422         }
 423 }
 424
 425 void
 426 recalculate_sizes(void)
 427 {
 428         recalculate_sizes_now(0);
 429 }
 430
 431 void
 432 recalculate_sizes_now(int now)
 433 {
 434         struct session  *s;
 435         struct client   *c;
 436         struct window   *w;
 437
 438         /*
 439          * Clear attached count and update saved status line information for
 440          * each session.
 441          */
 442         RB_FOREACH(s, sessions, &sessions) {
 443                 s->attached = 0;
 444                 status_update_cache(s);
 445         }
 446
 447         /*
 448          * Increment attached count and check the status line size for each
 449          * client.
 450          */
 451         TAILQ_FOREACH(c, &clients, entry) {
 452                 s = c->session;
 453                 if (s != NULL && !(c->flags & CLIENT_UNATTACHEDFLAGS))
 454                         s->attached++;
 455                 if (ignore_client_size(c))
 456                         continue;
 457                 if (c->tty.sy <= s->statuslines || (c->flags & CLIENT_CONTROL))
 458                         c->flags |= CLIENT_STATUSOFF;
 459                 else
 460                         c->flags &= ~CLIENT_STATUSOFF;
 461         }
 462
 463         /* Walk each window and adjust the size. */
 464         RB_FOREACH(w, windows, &windows)
 465                 recalculate_size(w, now);
 466 }