1 /* $OpenBSD$ */
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 * 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
recalculate_sizes(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 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 TAILQ_FOREACH(c, &clients, entry) {
61 if (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 s->attached++;
73 }
74 }
75 if (ssx == UINT_MAX || ssy == UINT_MAX) {
76 s->flags |= SESSION_UNATTACHED;
77 continue;
78 }
79 s->flags &= ~SESSION_UNATTACHED;
80
81 if (has_status && ssy == 0)
82 ssy = 1;
83
84 if (s->sx == ssx && s->sy == ssy)
85 continue;
86
87 log_debug("session size %u,%u (was %u,%u)", ssx, ssy, s->sx,
88 s->sy);
89
90 s->sx = ssx;
91 s->sy = ssy;
92 }
93
94 RB_FOREACH(w, windows, &windows) {
95 if (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);
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 forced = 0;
118 limit = options_get_number(w->options, "force-width");
119 if (limit >= PANE_MINIMUM && ssx > limit) {
120 ssx = limit;
121 forced |= WINDOW_FORCEWIDTH;
122 }
123 limit = options_get_number(w->options, "force-height");
124 if (limit >= PANE_MINIMUM && ssy > limit) {
125 ssy = limit;
126 forced |= WINDOW_FORCEHEIGHT;
127 }
128
129 if (w->sx == ssx && w->sy == ssy)
130 continue;
131 log_debug("window size %u,%u (was %u,%u)", ssx, ssy, w->sx,
132 w->sy);
133
134 w->flags &= ~(WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT);
135 w->flags |= forced;
136
137 is_zoomed = w->flags & WINDOW_ZOOMED;
138 if (is_zoomed)
139 window_unzoom(w);
140 layout_resize(w, ssx, ssy);
141 window_resize(w, ssx, ssy);
142 if (is_zoomed && window_pane_visible(w->active))
143 window_zoom(w->active);
144
145 /*
146 * If the current pane is now not visible, move to the next
147 * that is.
148 */
149 wp = w->active;
150 while (!window_pane_visible(w->active)) {
151 w->active = TAILQ_PREV(w->active, window_panes, entry);
152 if (w->active == NULL)
153 w->active = TAILQ_LAST(&w->panes, window_panes);
154 if (w->active == wp)
155 break;
156 }
157
158 server_redraw_window(w);
159 notify_window_layout_changed(w);
160 }
161 }
162