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, 1);
  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         notify_window("window-resized", w);
  65         w->flags &= ~WINDOW_RESIZE;
  66 }
  67
  68 static int
  69 ignore_client_size(struct client *c)
  70 {
  71         struct client   *loop;
  72
  73         if (c->session == NULL)
  74                 return (1);
  75         if (c->flags & CLIENT_NOSIZEFLAGS)
  76                 return (1);
  77         if (c->flags & CLIENT_IGNORESIZE) {
  78                 /*
  79                  * Ignore flagged clients if there are any attached clients
  80                  * that aren't flagged.
  81                  */
  82                 TAILQ_FOREACH (loop, &clients, entry) {
  83                         if (loop->session == NULL)
  84                                 continue;
  85                         if (loop->flags & CLIENT_NOSIZEFLAGS)
  86                                 continue;
  87                         if (~loop->flags & CLIENT_IGNORESIZE)
  88                                 return (1);
  89                 }
  90         }
  91         if ((c->flags & CLIENT_CONTROL) &&
  92             (~c->flags & CLIENT_SIZECHANGED) &&
  93             (~c->flags & CLIENT_WINDOWSIZECHANGED))
  94                 return (1);
  95         return (0);
  96 }
  97
  98 static u_int
  99 clients_with_window(struct window *w)
 100 {
 101         struct client   *loop;
 102         u_int            n = 0;
 103
 104         TAILQ_FOREACH(loop, &clients, entry) {
 105                 if (ignore_client_size(loop) || !session_has(loop->session, w))
 106                         continue;
 107                 if (++n > 1)
 108                         break;
 109         }
 110         return (n);
 111 }
 112
 113 static int
 114 clients_calculate_size(int type, int current, struct client *c,
 115     struct session *s, struct window *w, int (*skip_client)(struct client *,
 116     int, int, struct session *, struct window *), u_int *sx, u_int *sy,
 117     u_int *xpixel, u_int *ypixel)
 118 {
 119         struct client           *loop;
 120         struct client_window    *cw;
 121         u_int                    cx, cy, n = 0;
 122
 123         /*
 124          * Start comparing with 0 for largest and UINT_MAX for smallest or
 125          * latest.
 126          */
 127         if (type == WINDOW_SIZE_LARGEST) {
 128                 *sx = 0;
 129                 *sy = 0;
 130         } else if (type == WINDOW_SIZE_MANUAL) {
 131                 *sx = w->manual_sx;
 132                 *sy = w->manual_sy;
 133                 log_debug("%s: manual size %ux%u", __func__, *sx, *sy);
 134         } else {
 135                 *sx = UINT_MAX;
 136                 *sy = UINT_MAX;
 137         }
 138         *xpixel = *ypixel = 0;
 139
 140         /*
 141          * For latest, count the number of clients with this window. We only
 142          * care if there is more than one.
 143          */
 144         if (type == WINDOW_SIZE_LATEST && w != NULL)
 145                 n = clients_with_window(w);
 146
 147         /* Skip setting the size if manual */
 148         if (type == WINDOW_SIZE_MANUAL)
 149                 goto skip;
 150
 151         /* Loop over the clients and work out the size. */
 152         TAILQ_FOREACH(loop, &clients, entry) {
 153                 if (loop != c && ignore_client_size(loop)) {
 154                         log_debug("%s: ignoring %s (1)", __func__, loop->name);
 155                         continue;
 156                 }
 157                 if (loop != c && skip_client(loop, type, current, s, w)) {
 158                         log_debug("%s: skipping %s (1)", __func__, loop->name);
 159                         continue;
 160                 }
 161
 162                 /*
 163                  * If there are multiple clients attached, only accept the
 164                  * latest client; otherwise let the only client be chosen as
 165                  * for smallest.
 166                  */
 167                 if (type == WINDOW_SIZE_LATEST && n > 1 && loop != w->latest) {
 168                         log_debug("%s: %s is not latest", __func__, loop->name);
 169                         continue;
 170                 }
 171
 172                 /*
 173                  * If the client has a per-window size, use this instead if it is
 174                  * smaller.
 175                  */
 176                 if (w != NULL)
 177                         cw = server_client_get_client_window(loop, w->id);
 178                 else
 179                         cw = NULL;
 180
 181                 /* Work out this client's size. */
 182                 if (cw != NULL && cw->sx != 0 && cw->sy != 0) {
 183                         cx = cw->sx;
 184                         cy = cw->sy;
 185                 } else {
 186                         cx = loop->tty.sx;
 187                         cy = loop->tty.sy - status_line_size(loop);
 188                 }
 189
 190                 /*
 191                  * If it is larger or smaller than the best so far, update the
 192                  * new size.
 193                  */
 194                 if (type == WINDOW_SIZE_LARGEST) {
 195                         if (cx > *sx)
 196                                 *sx = cx;
 197                         if (cy > *sy)
 198                                 *sy = cy;
 199                 } else {
 200                         if (cx < *sx)
 201                                 *sx = cx;
 202                         if (cy < *sy)
 203                                 *sy = cy;
 204                 }
 205                 if (loop->tty.xpixel > *xpixel && loop->tty.ypixel > *ypixel) {
 206                         *xpixel = loop->tty.xpixel;
 207                         *ypixel = loop->tty.ypixel;
 208                 }
 209                 log_debug("%s: after %s (%ux%u), size is %ux%u", __func__,
 210                     loop->name, cx, cy, *sx, *sy);
 211         }
 212         if (*sx != UINT_MAX && *sy != UINT_MAX)
 213                 log_debug("%s: calculated size %ux%u", __func__, *sx, *sy);
 214         else
 215                 log_debug("%s: no calculated size", __func__);
 216
 217 skip:
 218         /*
 219          * Do not allow any size to be larger than the per-client window size
 220          * if one exists.
 221          */
 222         if (w != NULL) {
 223                 TAILQ_FOREACH(loop, &clients, entry) {
 224                         if (loop != c && ignore_client_size(loop))
 225                                 continue;
 226                         if (loop != c && skip_client(loop, type, current, s, w))
 227                                 continue;
 228
 229                         /* Look up per-window size if any. */
 230                         if (~loop->flags & CLIENT_WINDOWSIZECHANGED)
 231                                 continue;
 232                         cw = server_client_get_client_window(loop, w->id);
 233                         if (cw == NULL)
 234                                 continue;
 235
 236                         /* Clamp the size. */
 237                         log_debug("%s: %s size for @%u is %ux%u", __func__,
 238                             loop->name, w->id, cw->sx, cw->sy);
 239                         if (cw->sx != 0 && *sx > cw->sx)
 240                                 *sx = cw->sx;
 241                         if (cw->sy != 0 && *sy > cw->sy)
 242                                 *sy = cw->sy;
 243                 }
 244         }
 245         if (*sx != UINT_MAX && *sy != UINT_MAX)
 246                 log_debug("%s: calculated size %ux%u", __func__, *sx, *sy);
 247         else
 248                 log_debug("%s: no calculated size", __func__);
 249
 250         /* Return whether a suitable size was found. */
 251         if (type == WINDOW_SIZE_MANUAL) {
 252                 log_debug("%s: type is manual", __func__);
 253                 return (1);
 254         }
 255         if (type == WINDOW_SIZE_LARGEST) {
 256                 log_debug("%s: type is largest", __func__);
 257                 return (*sx != 0 && *sy != 0);
 258         }
 259         if (type == WINDOW_SIZE_LATEST)
 260                 log_debug("%s: type is latest", __func__);
 261         else
 262                 log_debug("%s: type is smallest", __func__);
 263         return (*sx != UINT_MAX && *sy != UINT_MAX);
 264 }
 265
 266 static int
 267 default_window_size_skip_client(struct client *loop, __unused int type,
 268     __unused int current, struct session *s, struct window *w)
 269 {
 270         if (w != NULL && !session_has(loop->session, w))
 271                 return (1);
 272         if (w == NULL && loop->session != s)
 273                 return (1);
 274         return (0);
 275 }
 276
 277 void
 278 default_window_size(struct client *c, struct session *s, struct window *w,
 279         u_int *sx, u_int *sy, u_int *xpixel, u_int *ypixel, int type)
 280 {
 281         const char      *value;
 282
 283         /* Get type if not provided. */
 284         if (type == -1)
 285                 type = options_get_number(global_w_options, "window-size");
 286
 287         /*
 288          * Latest clients can use the given client if suitable. If there is no
 289          * client and no window, use the default size as for manual type.
 290          */
 291         if (type == WINDOW_SIZE_LATEST && c != NULL && !ignore_client_size(c)) {
 292                 *sx = c->tty.sx;
 293                 *sy = c->tty.sy - status_line_size(c);
 294                 *xpixel = c->tty.xpixel;
 295                 *ypixel = c->tty.ypixel;
 296                 log_debug("%s: using %ux%u from %s", __func__, *sx, *sy,
 297                     c->name);
 298                 goto done;
 299         }
 300
 301         /*
 302          * Ignore the given client if it is a control client - the creating
 303          * client should only affect the size if it is not a control client.
 304          */
 305         if (c != NULL && (c->flags & CLIENT_CONTROL))
 306                 c = NULL;
 307
 308         /*
 309          * Look for a client to base the size on. If none exists (or the type
 310          * is manual), use the default-size option.
 311          */
 312         if (!clients_calculate_size(type, 0, c, s, w,
 313             default_window_size_skip_client, sx, sy, xpixel, ypixel)) {
 314                 value = options_get_string(s->options, "default-size");
 315                 if (sscanf(value, "%ux%u", sx, sy) != 2) {
 316                         *sx = 80;
 317                         *sy = 24;
 318                 }
 319                 log_debug("%s: using %ux%u from default-size", __func__, *sx,
 320                     *sy);
 321         }
 322
 323 done:
 324         /* Make sure the limits are enforced. */
 325         if (*sx < WINDOW_MINIMUM)
 326                 *sx = WINDOW_MINIMUM;
 327         if (*sx > WINDOW_MAXIMUM)
 328                 *sx = WINDOW_MAXIMUM;
 329         if (*sy < WINDOW_MINIMUM)
 330                 *sy = WINDOW_MINIMUM;
 331         if (*sy > WINDOW_MAXIMUM)
 332                 *sy = WINDOW_MAXIMUM;
 333         log_debug("%s: resulting size is %ux%u", __func__, *sx, *sy);
 334 }
 335
 336 static int
 337 recalculate_size_skip_client(struct client *loop, __unused int type,
 338     int current, __unused struct session *s, struct window *w)
 339 {
 340         /*
 341          * If the current flag is set, then skip any client where this window
 342          * is not the current window - this is used for aggressive-resize.
 343          * Otherwise skip any session that doesn't contain the window.
 344          */
 345         if (loop->session->curw == NULL)
 346                 return (1);
 347         if (current)
 348                 return (loop->session->curw->window != w);
 349         return (session_has(loop->session, w) == 0);
 350 }
 351
 352 void
 353 recalculate_size(struct window *w, int now)
 354 {
 355         u_int   sx, sy, xpixel = 0, ypixel = 0;
 356         int     type, current, changed;
 357
 358         /*
 359          * Do not attempt to resize windows which have no pane, they must be on
 360          * the way to destruction.
 361          */
 362         if (w->active == NULL)
 363                 return;
 364         log_debug("%s: @%u is %ux%u", __func__, w->id, w->sx, w->sy);
 365
 366         /*
 367          * Type is manual, smallest, largest, latest. Current is the
 368          * aggressive-resize option (do not resize based on clients where the
 369          * window is not the current window).
 370          */
 371         type = options_get_number(w->options, "window-size");
 372         current = options_get_number(w->options, "aggressive-resize");
 373
 374         /* Look for a suitable client and get the new size. */
 375         changed = clients_calculate_size(type, current, NULL, NULL, w,
 376             recalculate_size_skip_client, &sx, &sy, &xpixel, &ypixel);
 377
 378         /*
 379          * Make sure the size has actually changed. If the window has already
 380          * got a resize scheduled, then use the new size; otherwise the old.
 381          */
 382         if (w->flags & WINDOW_RESIZE) {
 383                 if (!now && changed && w->new_sx == sx && w->new_sy == sy)
 384                         changed = 0;
 385         } else {
 386                 if (!now && changed && w->sx == sx && w->sy == sy)
 387                         changed = 0;
 388         }
 389
 390         /*
 391          * If the size hasn't changed, update the window offset but not the
 392          * size.
 393          */
 394         if (!changed) {
 395                 log_debug("%s: @%u no size change", __func__, w->id);
 396                 tty_update_window_offset(w);
 397                 return;
 398         }
 399
 400         /*
 401          * If the now flag is set or if the window is sized manually, change
 402          * the size immediately. Otherwise set the flag and it will be done
 403          * later.
 404          */
 405         log_debug("%s: @%u new size %ux%u", __func__, w->id, sx, sy);
 406         if (now || type == WINDOW_SIZE_MANUAL)
 407                 resize_window(w, sx, sy, xpixel, ypixel);
 408         else {
 409                 w->new_sx = sx;
 410                 w->new_sy = sy;
 411                 w->new_xpixel = xpixel;
 412                 w->new_ypixel = ypixel;
 413
 414                 w->flags |= WINDOW_RESIZE;
 415                 tty_update_window_offset(w);
 416         }
 417 }
 418
 419 void
 420 recalculate_sizes(void)
 421 {
 422         recalculate_sizes_now(0);
 423 }
 424
 425 void
 426 recalculate_sizes_now(int now)
 427 {
 428         struct session  *s;
 429         struct client   *c;
 430         struct window   *w;
 431
 432         /*
 433          * Clear attached count and update saved status line information for
 434          * each session.
 435          */
 436         RB_FOREACH(s, sessions, &sessions) {
 437                 s->attached = 0;
 438                 status_update_cache(s);
 439         }
 440
 441         /*
 442          * Increment attached count and check the status line size for each
 443          * client.
 444          */
 445         TAILQ_FOREACH(c, &clients, entry) {
 446                 s = c->session;
 447                 if (s != NULL && !(c->flags & CLIENT_UNATTACHEDFLAGS))
 448                         s->attached++;
 449                 if (ignore_client_size(c))
 450                         continue;
 451                 if (c->tty.sy <= s->statuslines || (c->flags & CLIENT_CONTROL))
 452                         c->flags |= CLIENT_STATUSOFF;
 453                 else
 454                         c->flags &= ~CLIENT_STATUSOFF;
 455         }
 456
 457         /* Walk each window and adjust the size. */
 458         RB_FOREACH(w, windows, &windows)
 459                 recalculate_size(w, now);
 460 }