1 /* $OpenBSD: resize.c,v 1.12 2014/03/31 21:37:55 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 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 s->attached = 0; 59 ssx = ssy = UINT_MAX; 60 for (j = 0; j < ARRAY_LENGTH(&clients); j++) { 61 c = ARRAY_ITEM(&clients, j); 62 if (c == NULL || c->flags & CLIENT_SUSPENDED) 63 continue; 64 if (c->session == s) { 65 if (c->tty.sx < ssx) 66 ssx = c->tty.sx; 67 if (has_status && 68 !(c->flags & CLIENT_CONTROL) && 69 c->tty.sy > 1 && c->tty.sy - 1 < ssy) 70 ssy = c->tty.sy - 1; 71 else if (c->tty.sy < ssy) 72 ssy = c->tty.sy; 73 s->attached++; 74 } 75 } 76 if (ssx == UINT_MAX || ssy == UINT_MAX) { 77 s->flags |= SESSION_UNATTACHED; 78 continue; 79 } 80 s->flags &= ~SESSION_UNATTACHED; 81 82 if (has_status && ssy == 0) 83 ssy = 1; 84 85 if (s->sx == ssx && s->sy == ssy) 86 continue; 87 88 log_debug("session size %u,%u (was %u,%u)", ssx, ssy, s->sx, 89 s->sy); 90 91 s->sx = ssx; 92 s->sy = ssy; 93 } 94 95 for (i = 0; i < ARRAY_LENGTH(&windows); i++) { 96 w = ARRAY_ITEM(&windows, i); 97 if (w == NULL || w->active == NULL) 98 continue; 99 flag = options_get_number(&w->options, "aggressive-resize"); 100 101 ssx = ssy = UINT_MAX; 102 RB_FOREACH(s, sessions, &sessions) { 103 if (s->flags & SESSION_UNATTACHED) 104 continue; 105 if (flag) 106 has = s->curw->window == w; 107 else 108 has = session_has(s, w) != NULL; 109 if (has) { 110 if (s->sx < ssx) 111 ssx = s->sx; 112 if (s->sy < ssy) 113 ssy = s->sy; 114 } 115 } 116 if (ssx == UINT_MAX || ssy == UINT_MAX) 117 continue; 118 119 limit = options_get_number(&w->options, "force-width"); 120 if (limit != 0 && ssx > limit) 121 ssx = limit; 122 limit = options_get_number(&w->options, "force-height"); 123 if (limit != 0 && ssy > limit) 124 ssy = limit; 125 126 if (w->sx == ssx && w->sy == ssy) 127 continue; 128 log_debug("window size %u,%u (was %u,%u)", ssx, ssy, w->sx, 129 w->sy); 130 131 is_zoomed = w->flags & WINDOW_ZOOMED; 132 if (is_zoomed) 133 window_unzoom(w); 134 layout_resize(w, ssx, ssy); 135 window_resize(w, ssx, ssy); 136 if (is_zoomed && window_pane_visible(w->active)) 137 window_zoom(w->active); 138 139 /* 140 * If the current pane is now not visible, move to the next 141 * that is. 142 */ 143 wp = w->active; 144 while (!window_pane_visible(w->active)) { 145 w->active = TAILQ_PREV(w->active, window_panes, entry); 146 if (w->active == NULL) 147 w->active = TAILQ_LAST(&w->panes, window_panes); 148 if (w->active == wp) 149 break; 150 } 151 152 server_redraw_window(w); 153 notify_window_layout_changed(w); 154 } 155 } 156