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