resize.c

   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
  21 #include <string.h>
  22
  23 #include "tmux.h"
  24
  25 /*
  26  * Recalculate window and session sizes.
  27  *
  28  * Every session has the size of the smallest client it is attached to and
  29  * every window the size of the smallest session it is attached to.
  30  *
  31  * So, when a client is resized or a session attached to or detached from a
  32  * client, the window sizes must be recalculated. For each session, find the
  33  * smallest client it is attached to, and resize it to that size. Then for
  34  * every window, find the smallest session it is attached to, resize it to that
  35  * size and clear and redraw every client with it as the current window.
  36  *
  37  * This is quite inefficient - better/additional data structures are needed
  38  * to make it better.
  39  *
  40  * As a side effect, this function updates the SESSION_UNATTACHED flag. This
  41  * flag is necessary to make sure unattached sessions do not limit the size of
  42  * windows that are attached both to them and to other (attached) sessions.
  43  */
  44
  45 void
  46 recalculate_sizes(void)
  47 {
  48         struct session          *s;
  49         struct client           *c;
  50         struct window           *w;
  51         struct window_pane      *wp;
  52         u_int                    i, j, ssx, ssy, has, limit;
  53         int                      flag, has_status, is_zoomed;
  54
  55         RB_FOREACH(s, sessions, &sessions) {
  56                 has_status = options_get_number(&s->options, "status");
  57
  58                 ssx = ssy = UINT_MAX;
  59                 for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
  60                         c = ARRAY_ITEM(&clients, j);
  61                         if (c == NULL || c->flags & CLIENT_SUSPENDED)
  62                                 continue;
  63                         if (c->session == s) {
  64                                 if (c->tty.sx < ssx)
  65                                         ssx = c->tty.sx;
  66                                 if (has_status &&
  67                                     !(c->flags & CLIENT_CONTROL) &&
  68                                     c->tty.sy > 1 && c->tty.sy - 1 < ssy)
  69                                         ssy = c->tty.sy - 1;
  70                                 else if (c->tty.sy < ssy)
  71                                         ssy = c->tty.sy;
  72                         }
  73                 }
  74                 if (ssx == UINT_MAX || ssy == UINT_MAX) {
  75                         s->flags |= SESSION_UNATTACHED;
  76                         continue;
  77                 }
  78                 s->flags &= ~SESSION_UNATTACHED;
  79
  80                 if (has_status && ssy == 0)
  81                         ssy = 1;
  82
  83                 if (s->sx == ssx && s->sy == ssy)
  84                         continue;
  85
  86                 log_debug("session size %u,%u (was %u,%u)", ssx, ssy, s->sx,
  87                     s->sy);
  88
  89                 s->sx = ssx;
  90                 s->sy = ssy;
  91         }
  92
  93         for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
  94                 w = ARRAY_ITEM(&windows, i);
  95                 if (w == NULL || w->active == NULL)
  96                         continue;
  97                 flag = options_get_number(&w->options, "aggressive-resize");
  98
  99                 ssx = ssy = UINT_MAX;
 100                 RB_FOREACH(s, sessions, &sessions) {
 101                         if (s->flags & SESSION_UNATTACHED)
 102                                 continue;
 103                         if (flag)
 104                                 has = s->curw->window == w;
 105                         else
 106                                 has = session_has(s, w) != NULL;
 107                         if (has) {
 108                                 if (s->sx < ssx)
 109                                         ssx = s->sx;
 110                                 if (s->sy < ssy)
 111                                         ssy = s->sy;
 112                         }
 113                 }
 114                 if (ssx == UINT_MAX || ssy == UINT_MAX)
 115                         continue;
 116
 117                 limit = options_get_number(&w->options, "force-width");
 118                 if (limit != 0 && ssx > limit)
 119                         ssx = limit;
 120                 limit = options_get_number(&w->options, "force-height");
 121                 if (limit != 0 && ssy > limit)
 122                         ssy = limit;
 123
 124                 if (w->sx == ssx && w->sy == ssy)
 125                         continue;
 126                 log_debug("window size %u,%u (was %u,%u)", ssx, ssy, w->sx,
 127                     w->sy);
 128
 129                 is_zoomed = w->flags & WINDOW_ZOOMED;
 130                 if (is_zoomed)
 131                         window_unzoom(w);
 132                 layout_resize(w, ssx, ssy);
 133                 window_resize(w, ssx, ssy);
 134                 if (is_zoomed && window_pane_visible(w->active))
 135                         window_zoom(w->active);
 136
 137                 /*
 138                  * If the current pane is now not visible, move to the next
 139                  * that is.
 140                  */
 141                 wp = w->active;
 142                 while (!window_pane_visible(w->active)) {
 143                         w->active = TAILQ_PREV(w->active, window_panes, entry);
 144                         if (w->active == NULL)
 145                                 w->active = TAILQ_LAST(&w->panes, window_panes);
 146                         if (w->active == wp)
 147                                break;
 148                 }
 149
 150                 server_redraw_window(w);
 151                 notify_window_layout_changed(w);
 152         }
 153 }