1 /* $OpenBSD: resize.c,v 1.15 2015/04/22 15:30:11 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, ssx, ssy, has, limit; 53 int flag, has_status, is_zoomed, forced; 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 (i = 0; i < ARRAY_LENGTH(&clients); i++) { 61 c = ARRAY_ITEM(&clients, i); 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 RB_FOREACH(w, windows, &windows) { 96 if (w->active == NULL) 97 continue; 98 flag = options_get_number(&w->options, "aggressive-resize"); 99 100 ssx = ssy = UINT_MAX; 101 RB_FOREACH(s, sessions, &sessions) { 102 if (s->flags & SESSION_UNATTACHED) 103 continue; 104 if (flag) 105 has = s->curw->window == w; 106 else 107 has = session_has(s, w) != NULL; 108 if (has) { 109 if (s->sx < ssx) 110 ssx = s->sx; 111 if (s->sy < ssy) 112 ssy = s->sy; 113 } 114 } 115 if (ssx == UINT_MAX || ssy == UINT_MAX) 116 continue; 117 118 forced = 0; 119 limit = options_get_number(&w->options, "force-width"); 120 if (limit >= PANE_MINIMUM && ssx > limit) { 121 ssx = limit; 122 forced |= WINDOW_FORCEWIDTH; 123 } 124 limit = options_get_number(&w->options, "force-height"); 125 if (limit >= PANE_MINIMUM && ssy > limit) { 126 ssy = limit; 127 forced |= WINDOW_FORCEHEIGHT; 128 } 129 130 if (w->sx == ssx && w->sy == ssy) 131 continue; 132 log_debug("window size %u,%u (was %u,%u)", ssx, ssy, w->sx, 133 w->sy); 134 135 w->flags &= ~(WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT); 136 w->flags |= forced; 137 138 is_zoomed = w->flags & WINDOW_ZOOMED; 139 if (is_zoomed) 140 window_unzoom(w); 141 layout_resize(w, ssx, ssy); 142 window_resize(w, ssx, ssy); 143 if (is_zoomed && window_pane_visible(w->active)) 144 window_zoom(w->active); 145 146 /* 147 * If the current pane is now not visible, move to the next 148 * that is. 149 */ 150 wp = w->active; 151 while (!window_pane_visible(w->active)) { 152 w->active = TAILQ_PREV(w->active, window_panes, entry); 153 if (w->active == NULL) 154 w->active = TAILQ_LAST(&w->panes, window_panes); 155 if (w->active == wp) 156 break; 157 } 158 159 server_redraw_window(w); 160 notify_window_layout_changed(w); 161 } 162 } 163