1 /* $OpenBSD: resize.c,v 1.26 2018/08/18 20:08:52 nicm Exp $ */ 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 /* 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 41 void 42 recalculate_sizes(void) 43 { 44 struct session *s; 45 struct client *c; 46 struct window *w; 47 struct window_pane *wp; 48 u_int ssx, ssy, has, limit, lines; 49 int flag, is_zoomed, forced; 50 51 RB_FOREACH(s, sessions, &sessions) { 52 lines = status_line_size(s); 53 54 s->attached = 0; 55 ssx = ssy = UINT_MAX; 56 TAILQ_FOREACH(c, &clients, entry) { 57 if (c->flags & CLIENT_SUSPENDED) 58 continue; 59 if ((c->flags & (CLIENT_CONTROL|CLIENT_SIZECHANGED)) == 60 CLIENT_CONTROL) 61 continue; 62 if (c->session == s) { 63 if (c->tty.sx < ssx) 64 ssx = c->tty.sx; 65 c->flags &= ~CLIENT_STATUSOFF; 66 if (lines != 0 && lines + PANE_MINIMUM > c->tty.sy) 67 c->flags |= CLIENT_STATUSOFF; 68 if ((~c->flags & CLIENT_STATUSOFF) && 69 !(c->flags & CLIENT_CONTROL) && 70 c->tty.sy > lines && 71 c->tty.sy - lines < ssy) 72 ssy = c->tty.sy - lines; 73 else if (c->tty.sy < ssy) 74 ssy = c->tty.sy; 75 s->attached++; 76 } 77 } 78 if (ssx == UINT_MAX || ssy == UINT_MAX) 79 continue; 80 81 if (lines != 0 && ssy == 0) 82 ssy = lines; 83 84 if (s->sx == ssx && s->sy == ssy) 85 continue; 86 87 log_debug("session $%u size %u,%u (was %u,%u)", s->id, ssx, ssy, 88 s->sx, s->sy); 89 90 s->sx = ssx; 91 s->sy = ssy; 92 93 status_update_saved(s); 94 } 95 96 RB_FOREACH(w, windows, &windows) { 97 if (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->attached == 0) 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 continue; 118 119 forced = 0; 120 limit = options_get_number(w->options, "force-width"); 121 if (limit >= PANE_MINIMUM && ssx > limit) { 122 ssx = limit; 123 forced |= WINDOW_FORCEWIDTH; 124 } 125 limit = options_get_number(w->options, "force-height"); 126 if (limit >= PANE_MINIMUM && ssy > limit) { 127 ssy = limit; 128 forced |= WINDOW_FORCEHEIGHT; 129 } 130 131 if (w->sx == ssx && w->sy == ssy) 132 continue; 133 log_debug("window @%u size %u,%u (was %u,%u)", w->id, ssx, ssy, 134 w->sx, w->sy); 135 136 w->flags &= ~(WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT); 137 w->flags |= forced; 138 139 is_zoomed = w->flags & WINDOW_ZOOMED; 140 if (is_zoomed) 141 window_unzoom(w); 142 layout_resize(w, ssx, ssy); 143 window_resize(w, ssx, ssy); 144 if (is_zoomed && window_pane_visible(w->active)) 145 window_zoom(w->active); 146 147 /* 148 * If the current pane is now not visible, move to the next 149 * that is. 150 */ 151 wp = w->active; 152 while (!window_pane_visible(w->active)) { 153 w->active = TAILQ_PREV(w->active, window_panes, entry); 154 if (w->active == NULL) 155 w->active = TAILQ_LAST(&w->panes, window_panes); 156 if (w->active == wp) 157 break; 158 } 159 if (w->active == w->last) 160 w->last = NULL; 161 162 server_redraw_window(w); 163 notify_window("window-layout-changed", w); 164 } 165 } 166