xref: /minix3/external/bsd/tmux/dist/resize.c (revision 0a6a1f1d05b60e214de2f05a7310ddd1f0e590e7)
1*0a6a1f1dSLionel Sambuc /* Id */
2eda6f593SDavid van Moolenbroek 
3eda6f593SDavid van Moolenbroek /*
4eda6f593SDavid van Moolenbroek  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
5eda6f593SDavid van Moolenbroek  *
6eda6f593SDavid van Moolenbroek  * Permission to use, copy, modify, and distribute this software for any
7eda6f593SDavid van Moolenbroek  * purpose with or without fee is hereby granted, provided that the above
8eda6f593SDavid van Moolenbroek  * copyright notice and this permission notice appear in all copies.
9eda6f593SDavid van Moolenbroek  *
10eda6f593SDavid van Moolenbroek  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11eda6f593SDavid van Moolenbroek  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12eda6f593SDavid van Moolenbroek  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13eda6f593SDavid van Moolenbroek  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14eda6f593SDavid van Moolenbroek  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15eda6f593SDavid van Moolenbroek  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16eda6f593SDavid van Moolenbroek  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17eda6f593SDavid van Moolenbroek  */
18eda6f593SDavid van Moolenbroek 
19eda6f593SDavid van Moolenbroek #include <sys/types.h>
20eda6f593SDavid van Moolenbroek 
21eda6f593SDavid van Moolenbroek #include <string.h>
22eda6f593SDavid van Moolenbroek 
23eda6f593SDavid van Moolenbroek #include "tmux.h"
24eda6f593SDavid van Moolenbroek 
25eda6f593SDavid van Moolenbroek /*
26eda6f593SDavid van Moolenbroek  * Recalculate window and session sizes.
27eda6f593SDavid van Moolenbroek  *
28eda6f593SDavid van Moolenbroek  * Every session has the size of the smallest client it is attached to and
29eda6f593SDavid van Moolenbroek  * every window the size of the smallest session it is attached to.
30eda6f593SDavid van Moolenbroek  *
31eda6f593SDavid van Moolenbroek  * So, when a client is resized or a session attached to or detached from a
32eda6f593SDavid van Moolenbroek  * client, the window sizes must be recalculated. For each session, find the
33eda6f593SDavid van Moolenbroek  * smallest client it is attached to, and resize it to that size. Then for
34eda6f593SDavid van Moolenbroek  * every window, find the smallest session it is attached to, resize it to that
35eda6f593SDavid van Moolenbroek  * size and clear and redraw every client with it as the current window.
36eda6f593SDavid van Moolenbroek  *
37eda6f593SDavid van Moolenbroek  * This is quite inefficient - better/additional data structures are needed
38eda6f593SDavid van Moolenbroek  * to make it better.
39eda6f593SDavid van Moolenbroek  *
40eda6f593SDavid van Moolenbroek  * As a side effect, this function updates the SESSION_UNATTACHED flag. This
41eda6f593SDavid van Moolenbroek  * flag is necessary to make sure unattached sessions do not limit the size of
42eda6f593SDavid van Moolenbroek  * windows that are attached both to them and to other (attached) sessions.
43eda6f593SDavid van Moolenbroek  */
44eda6f593SDavid van Moolenbroek 
45eda6f593SDavid van Moolenbroek void
recalculate_sizes(void)46eda6f593SDavid van Moolenbroek recalculate_sizes(void)
47eda6f593SDavid van Moolenbroek {
48eda6f593SDavid van Moolenbroek 	struct session		*s;
49eda6f593SDavid van Moolenbroek 	struct client		*c;
50eda6f593SDavid van Moolenbroek 	struct window		*w;
51eda6f593SDavid van Moolenbroek 	struct window_pane	*wp;
52eda6f593SDavid van Moolenbroek 	u_int			 i, j, ssx, ssy, has, limit;
53*0a6a1f1dSLionel Sambuc 	int			 flag, has_status, is_zoomed;
54eda6f593SDavid van Moolenbroek 
55eda6f593SDavid van Moolenbroek 	RB_FOREACH(s, sessions, &sessions) {
56*0a6a1f1dSLionel Sambuc 		has_status = options_get_number(&s->options, "status");
57*0a6a1f1dSLionel Sambuc 
58eda6f593SDavid van Moolenbroek 		ssx = ssy = UINT_MAX;
59eda6f593SDavid van Moolenbroek 		for (j = 0; j < ARRAY_LENGTH(&clients); j++) {
60eda6f593SDavid van Moolenbroek 			c = ARRAY_ITEM(&clients, j);
61eda6f593SDavid van Moolenbroek 			if (c == NULL || c->flags & CLIENT_SUSPENDED)
62eda6f593SDavid van Moolenbroek 				continue;
63eda6f593SDavid van Moolenbroek 			if (c->session == s) {
64eda6f593SDavid van Moolenbroek 				if (c->tty.sx < ssx)
65eda6f593SDavid van Moolenbroek 					ssx = c->tty.sx;
66*0a6a1f1dSLionel Sambuc 				if (has_status &&
67*0a6a1f1dSLionel Sambuc 				    !(c->flags & CLIENT_CONTROL) &&
68*0a6a1f1dSLionel Sambuc 				    c->tty.sy > 1 && c->tty.sy - 1 < ssy)
69*0a6a1f1dSLionel Sambuc 					ssy = c->tty.sy - 1;
70*0a6a1f1dSLionel Sambuc 				else if (c->tty.sy < ssy)
71eda6f593SDavid van Moolenbroek 					ssy = c->tty.sy;
72eda6f593SDavid van Moolenbroek 			}
73eda6f593SDavid van Moolenbroek 		}
74eda6f593SDavid van Moolenbroek 		if (ssx == UINT_MAX || ssy == UINT_MAX) {
75eda6f593SDavid van Moolenbroek 			s->flags |= SESSION_UNATTACHED;
76eda6f593SDavid van Moolenbroek 			continue;
77eda6f593SDavid van Moolenbroek 		}
78eda6f593SDavid van Moolenbroek 		s->flags &= ~SESSION_UNATTACHED;
79eda6f593SDavid van Moolenbroek 
80*0a6a1f1dSLionel Sambuc 		if (has_status && ssy == 0)
81eda6f593SDavid van Moolenbroek 			ssy = 1;
82*0a6a1f1dSLionel Sambuc 
83eda6f593SDavid van Moolenbroek 		if (s->sx == ssx && s->sy == ssy)
84eda6f593SDavid van Moolenbroek 			continue;
85eda6f593SDavid van Moolenbroek 
86*0a6a1f1dSLionel Sambuc 		log_debug("session size %u,%u (was %u,%u)", ssx, ssy, s->sx,
87*0a6a1f1dSLionel Sambuc 		    s->sy);
88eda6f593SDavid van Moolenbroek 
89eda6f593SDavid van Moolenbroek 		s->sx = ssx;
90eda6f593SDavid van Moolenbroek 		s->sy = ssy;
91eda6f593SDavid van Moolenbroek 	}
92eda6f593SDavid van Moolenbroek 
93eda6f593SDavid van Moolenbroek 	for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
94eda6f593SDavid van Moolenbroek 		w = ARRAY_ITEM(&windows, i);
95*0a6a1f1dSLionel Sambuc 		if (w == NULL || w->active == NULL)
96eda6f593SDavid van Moolenbroek 			continue;
97eda6f593SDavid van Moolenbroek 		flag = options_get_number(&w->options, "aggressive-resize");
98eda6f593SDavid van Moolenbroek 
99eda6f593SDavid van Moolenbroek 		ssx = ssy = UINT_MAX;
100eda6f593SDavid van Moolenbroek 		RB_FOREACH(s, sessions, &sessions) {
101eda6f593SDavid van Moolenbroek 			if (s->flags & SESSION_UNATTACHED)
102eda6f593SDavid van Moolenbroek 				continue;
103eda6f593SDavid van Moolenbroek 			if (flag)
104eda6f593SDavid van Moolenbroek 				has = s->curw->window == w;
105eda6f593SDavid van Moolenbroek 			else
106eda6f593SDavid van Moolenbroek 				has = session_has(s, w) != NULL;
107eda6f593SDavid van Moolenbroek 			if (has) {
108eda6f593SDavid van Moolenbroek 				if (s->sx < ssx)
109eda6f593SDavid van Moolenbroek 					ssx = s->sx;
110eda6f593SDavid van Moolenbroek 				if (s->sy < ssy)
111eda6f593SDavid van Moolenbroek 					ssy = s->sy;
112eda6f593SDavid van Moolenbroek 			}
113eda6f593SDavid van Moolenbroek 		}
114eda6f593SDavid van Moolenbroek 		if (ssx == UINT_MAX || ssy == UINT_MAX)
115eda6f593SDavid van Moolenbroek 			continue;
116eda6f593SDavid van Moolenbroek 
117eda6f593SDavid van Moolenbroek 		limit = options_get_number(&w->options, "force-width");
118eda6f593SDavid van Moolenbroek 		if (limit != 0 && ssx > limit)
119eda6f593SDavid van Moolenbroek 			ssx = limit;
120eda6f593SDavid van Moolenbroek 		limit = options_get_number(&w->options, "force-height");
121eda6f593SDavid van Moolenbroek 		if (limit != 0 && ssy > limit)
122eda6f593SDavid van Moolenbroek 			ssy = limit;
123eda6f593SDavid van Moolenbroek 
124eda6f593SDavid van Moolenbroek 		if (w->sx == ssx && w->sy == ssy)
125eda6f593SDavid van Moolenbroek 			continue;
126*0a6a1f1dSLionel Sambuc 		log_debug("window size %u,%u (was %u,%u)", ssx, ssy, w->sx,
127*0a6a1f1dSLionel Sambuc 		    w->sy);
128eda6f593SDavid van Moolenbroek 
129*0a6a1f1dSLionel Sambuc 		is_zoomed = w->flags & WINDOW_ZOOMED;
130*0a6a1f1dSLionel Sambuc 		if (is_zoomed)
131*0a6a1f1dSLionel Sambuc 			window_unzoom(w);
132eda6f593SDavid van Moolenbroek 		layout_resize(w, ssx, ssy);
133eda6f593SDavid van Moolenbroek 		window_resize(w, ssx, ssy);
134*0a6a1f1dSLionel Sambuc 		if (is_zoomed && window_pane_visible(w->active))
135*0a6a1f1dSLionel Sambuc 			window_zoom(w->active);
136eda6f593SDavid van Moolenbroek 
137eda6f593SDavid van Moolenbroek 		/*
138eda6f593SDavid van Moolenbroek 		 * If the current pane is now not visible, move to the next
139eda6f593SDavid van Moolenbroek 		 * that is.
140eda6f593SDavid van Moolenbroek 		 */
141eda6f593SDavid van Moolenbroek 		wp = w->active;
142eda6f593SDavid van Moolenbroek 		while (!window_pane_visible(w->active)) {
143eda6f593SDavid van Moolenbroek 			w->active = TAILQ_PREV(w->active, window_panes, entry);
144eda6f593SDavid van Moolenbroek 			if (w->active == NULL)
145eda6f593SDavid van Moolenbroek 				w->active = TAILQ_LAST(&w->panes, window_panes);
146eda6f593SDavid van Moolenbroek 			if (w->active == wp)
147eda6f593SDavid van Moolenbroek 			       break;
148eda6f593SDavid van Moolenbroek 		}
149eda6f593SDavid van Moolenbroek 
150eda6f593SDavid van Moolenbroek 		server_redraw_window(w);
151*0a6a1f1dSLionel Sambuc 		notify_window_layout_changed(w);
152eda6f593SDavid van Moolenbroek 	}
153eda6f593SDavid van Moolenbroek }
154