1 /* $OpenBSD: resize.c,v 1.4 2009/09/24 07:02:56 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; 54 55 for (i = 0; i < ARRAY_LENGTH(&sessions); i++) { 56 s = ARRAY_ITEM(&sessions, i); 57 if (s == NULL) 58 continue; 59 60 ssx = ssy = UINT_MAX; 61 for (j = 0; j < ARRAY_LENGTH(&clients); j++) { 62 c = ARRAY_ITEM(&clients, j); 63 if (c == NULL || c->flags & CLIENT_SUSPENDED) 64 continue; 65 if (c->session == s) { 66 if (c->tty.sx < ssx) 67 ssx = c->tty.sx; 68 if (c->tty.sy < ssy) 69 ssy = c->tty.sy; 70 } 71 } 72 if (ssx == UINT_MAX || ssy == UINT_MAX) { 73 s->flags |= SESSION_UNATTACHED; 74 continue; 75 } 76 s->flags &= ~SESSION_UNATTACHED; 77 78 if (options_get_number(&s->options, "status")) { 79 if (ssy == 0) 80 ssy = 1; 81 else 82 ssy--; 83 } 84 if (s->sx == ssx && s->sy == ssy) 85 continue; 86 87 log_debug( 88 "session size %u,%u (was %u,%u)", ssx, ssy, s->sx, s->sy); 89 90 s->sx = ssx; 91 s->sy = ssy; 92 } 93 94 for (i = 0; i < ARRAY_LENGTH(&windows); i++) { 95 w = ARRAY_ITEM(&windows, i); 96 if (w == NULL) 97 continue; 98 flag = options_get_number(&w->options, "aggressive-resize"); 99 100 ssx = ssy = UINT_MAX; 101 for (j = 0; j < ARRAY_LENGTH(&sessions); j++) { 102 s = ARRAY_ITEM(&sessions, j); 103 if (s == NULL || s->flags & SESSION_UNATTACHED) 104 continue; 105 if (flag) 106 has = s->curw->window == w; 107 else 108 has = session_has(s, w); 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 w->flags |= WINDOW_HIDDEN; 118 continue; 119 } 120 w->flags &= ~WINDOW_HIDDEN; 121 122 limit = options_get_number(&w->options, "force-width"); 123 if (limit != 0 && ssx > limit) 124 ssx = limit; 125 limit = options_get_number(&w->options, "force-height"); 126 if (limit != 0 && ssy > limit) 127 ssy = limit; 128 129 if (w->sx == ssx && w->sy == ssy) 130 continue; 131 132 log_debug( 133 "window size %u,%u (was %u,%u)", ssx, ssy, w->sx, w->sy); 134 135 layout_resize(w, ssx, ssy); 136 window_resize(w, ssx, ssy); 137 138 /* 139 * If the current pane is now not visible, move to the next 140 * that is. 141 */ 142 wp = w->active; 143 while (!window_pane_visible(w->active)) { 144 w->active = TAILQ_PREV(w->active, window_panes, entry); 145 if (w->active == NULL) 146 w->active = TAILQ_LAST(&w->panes, window_panes); 147 if (w->active == wp) 148 break; 149 } 150 151 server_redraw_window(w); 152 } 153 } 154