summaryrefslogtreecommitdiffstats
path: root/session.c
blob: 2834fdcdcd9895f2724195c4f60caaae65e1d4b5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
/* $Id$ */

/*
 * Copyright (c) 2007 Nicholas Marriott <[email protected]>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>

#include "tmux.h"

/* Global session list. */
struct sessions	sessions;

void
session_cancelbell(struct session *s, struct winlink *wl)
{
	u_int	i;

	for (i = 0; i < ARRAY_LENGTH(&s->bells); i++) {
		if (ARRAY_ITEM(&s->bells, i) == wl) {
			ARRAY_REMOVE(&s->bells, i);
			break;
		}
	}
}

void
session_addbell(struct session *s, struct window *w)
{
	struct winlink	*wl;

	RB_FOREACH(wl, winlinks, &s->windows) {
		if (wl == s->curw)
			continue;
		if (wl->window == w && !session_hasbell(s, wl))
			ARRAY_ADD(&s->bells, wl);
	}
}

int
session_hasbell(struct session *s, struct winlink *wl)
{
	u_int	i;

	for (i = 0; i < ARRAY_LENGTH(&s->bells); i++) {
		if (ARRAY_ITEM(&s->bells, i) == wl)
			return (1);
	}
	return (0);
}

/* Find session by name. */
struct session *
session_find(const char *name)
{
	struct session	*s;
	u_int		 i;

	for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
		s = ARRAY_ITEM(&sessions, i);
		if (s != NULL && strcmp(s->name, name) == 0)
			return (s);
	}

	return (NULL);
}

/* Create a new session. */
struct session *
session_create(const char *name, const char *cmd, u_int sx, u_int sy)
{
	struct session	*s;
	u_int		 i;

	s = xmalloc(sizeof *s);
	s->tim = time(NULL);
	s->curw = s->lastw = NULL;
	RB_INIT(&s->windows);
	ARRAY_INIT(&s->bells);

	s->sx = sx;
	s->sy = sy;

	for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
		if (ARRAY_ITEM(&sessions, i) == NULL) {
			ARRAY_SET(&sessions, i, s);
			break;
		}
	}
	if (i == ARRAY_LENGTH(&sessions))
		ARRAY_ADD(&sessions, s);

	if (name != NULL)
		s->name = xstrdup(name);
	else
		xasprintf(&s->name, "%u", i);
	if (session_new(s, NULL, cmd, -1) == NULL) {
		session_destroy(s);
		return (NULL);
	}
	session_select(s, 0);

	return (s);
}

/* Destroy a session. */
void
session_destroy(struct session *s)
{
	u_int	i;

	if (session_index(s, &i) != 0)
		fatalx("session not found");
	ARRAY_SET(&sessions, i, NULL);
	while (!ARRAY_EMPTY(&sessions) && ARRAY_LAST(&sessions) == NULL)
		ARRAY_TRUNC(&sessions, 1);

	while (!RB_EMPTY(&s->windows))
		winlink_remove(&s->windows, RB_ROOT(&s->windows));

	xfree(s->name);
	xfree(s);
}

/* Find session index. */
int
session_index(struct session *s, u_int *i)
{
	for (*i = 0; *i < ARRAY_LENGTH(&sessions); (*i)++) {
		if (s == ARRAY_ITEM(&sessions, *i))
			return (0);
	}
	return (-1);
}

/* Create a new window on a session. */
struct winlink *
session_new(struct session *s, const char *name, const char *cmd, int idx)
{
	struct window	*w;
	const char	*env[] = { NULL, "TERM=screen", NULL };
	char		 buf[256];
	u_int		 i;

	if (session_index(s, &i) != 0)
		fatalx("session not found");
	xsnprintf(buf, sizeof buf, "TMUX=%ld,%u", (long) getpid(), i);
	env[0] = buf;

	if ((w = window_create(name, cmd, env, s->sx, s->sy)) == NULL)
		return (NULL);
	return (session_attach(s, w, idx));
}

/* Attach a window to a session. */
struct winlink *
session_attach(struct session *s, struct window *w, int idx)
{
	return (winlink_add(&s->windows, w, idx));
}

/* Detach a window from a session. */
int
session_detach(struct session *s, struct winlink *wl)
{
	if (s->curw == wl && session_last(s) != 0 && session_previous(s) != 0)
		session_next(s);
	if (s->lastw == wl)
		s->lastw = NULL;

	session_cancelbell(s, wl);
	winlink_remove(&s->windows, wl);
	if (RB_EMPTY(&s->windows)) {
		session_destroy(s);
		return (1);
	}
	return (0);
}

/* Return if session has window. */
int
session_has(struct session *s, struct window *w)
{
	struct winlink	*wl;

	RB_FOREACH(wl, winlinks, &s->windows) {
		if (wl->window == w)
			return (1);
	}
	return (0);
}

/* Move session to next window. */
int
session_next(struct session *s)
{
	struct winlink	*wl;

	if (s->curw == NULL)
		return (-1);

	wl = winlink_next(&s->windows, s->curw);
	if (wl == NULL)
		wl = RB_MIN(winlinks, &s->windows);
	if (wl == s->curw)
		return (1);
	s->lastw = s->curw;
	s->curw = wl;
	session_cancelbell(s, wl);
	return (0);
}

/* Move session to previous window. */
int
session_previous(struct session *s)
{
	struct winlink	*wl;

	if (s->curw == NULL)
		return (-1);

	wl = winlink_previous(&s->windows, s->curw);
	if (wl == NULL)
		wl = RB_MAX(winlinks, &s->windows);
	if (wl == s->curw)
		return (1);
	s->lastw = s->curw;
	s->curw = wl;
	session_cancelbell(s, wl);
	return (0);
}

/* Move session to specific window. */
int
session_select(struct session *s, int idx)
{
	struct winlink	*wl;

	wl = winlink_find_by_index(&s->windows, idx);
	if (wl == NULL)
		return (-1);
	if (wl == s->curw)
		return (1);
	s->lastw = s->curw;
	s->curw = wl;
	session_cancelbell(s, wl);
	return (0);
}

/* Move session to last used window. */
int
session_last(struct session *s)
{
	struct winlink	*wl;

	wl = s->lastw;
	if (wl == NULL)
		return (-1);
	if (wl == s->curw)
		return (1);

	s->lastw = s->curw;
	s->curw = wl;
	session_cancelbell(s, wl);
	return (0);
}