cmd-split-window.c revision 1.85 
1/* $OpenBSD: cmd-split-window.c,v 1.85 2017/05/30 21:44:59 nicm Exp $ */
2
3/*
4 * Copyright (c) 2009 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 <errno.h>
22#include <fcntl.h>
23#include <paths.h>
24#include <stdlib.h>
25#include <string.h>
26#include <unistd.h>
27
28#include "tmux.h"
29
30/*
31 * Split a window (add a new pane).
32 */
33
34#define SPLIT_WINDOW_TEMPLATE "#{session_name}:#{window_index}.#{pane_index}"
35
36static enum cmd_retval	cmd_split_window_exec(struct cmd *,
37			    struct cmdq_item *);
38
39const struct cmd_entry cmd_split_window_entry = {
40	.name = "split-window",
41	.alias = "splitw",
42
43	.args = { "bc:dfF:l:hp:Pt:v", 0, -1 },
44	.usage = "[-bdfhvP] [-c start-directory] [-F format] "
45		 "[-p percentage|-l size] " CMD_TARGET_PANE_USAGE " [command]",
46
47	.target = { 't', CMD_FIND_PANE, 0 },
48
49	.flags = 0,
50	.exec = cmd_split_window_exec
51};
52
53static enum cmd_retval
54cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
55{
56	struct cmd_find_state	*current = &item->shared->current;
57	struct args		*args = self->args;
58	struct client		*c = cmd_find_client(item, NULL, 1);
59	struct session		*s = item->target.s;
60	struct winlink		*wl = item->target.wl;
61	struct window		*w = wl->window;
62	struct window_pane	*wp = item->target.wp, *new_wp = NULL;
63	struct environ		*env;
64	const char		*cmd, *path, *shell, *template, *cwd, *to_free;
65	char		       **argv, *cause, *new_cause, *cp;
66	u_int			 hlimit;
67	int			 argc, size, percentage;
68	enum layout_type	 type;
69	struct layout_cell	*lc;
70	struct environ_entry	*envent;
71	struct cmd_find_state    fs;
72
73	server_unzoom_window(w);
74
75	if (args->argc == 0) {
76		cmd = options_get_string(s->options, "default-command");
77		if (cmd != NULL && *cmd != '\0') {
78			argc = 1;
79			argv = (char **)&cmd;
80		} else {
81			argc = 0;
82			argv = NULL;
83		}
84	} else {
85		argc = args->argc;
86		argv = args->argv;
87	}
88
89	to_free = NULL;
90	if (args_has(args, 'c')) {
91		cwd = args_get(args, 'c');
92		to_free = cwd = format_single(item, cwd, c, s, NULL, NULL);
93	} else if (item->client != NULL && item->client->session == NULL)
94		cwd = item->client->cwd;
95	else
96		cwd = s->cwd;
97
98	type = LAYOUT_TOPBOTTOM;
99	if (args_has(args, 'h'))
100		type = LAYOUT_LEFTRIGHT;
101
102	size = -1;
103	if (args_has(args, 'l')) {
104		size = args_strtonum(args, 'l', 0, INT_MAX, &cause);
105		if (cause != NULL) {
106			xasprintf(&new_cause, "size %s", cause);
107			free(cause);
108			cause = new_cause;
109			goto error;
110		}
111	} else if (args_has(args, 'p')) {
112		percentage = args_strtonum(args, 'p', 0, INT_MAX, &cause);
113		if (cause != NULL) {
114			xasprintf(&new_cause, "percentage %s", cause);
115			free(cause);
116			cause = new_cause;
117			goto error;
118		}
119		if (type == LAYOUT_TOPBOTTOM)
120			size = (wp->sy * percentage) / 100;
121		else
122			size = (wp->sx * percentage) / 100;
123	}
124	hlimit = options_get_number(s->options, "history-limit");
125
126	shell = options_get_string(s->options, "default-shell");
127	if (*shell == '\0' || areshell(shell))
128		shell = _PATH_BSHELL;
129
130	lc = layout_split_pane(wp, type, size, args_has(args, 'b'),
131	    args_has(args, 'f'));
132	if (lc == NULL) {
133		cause = xstrdup("pane too small");
134		goto error;
135	}
136	new_wp = window_add_pane(w, wp, args_has(args, 'b'), hlimit);
137	layout_make_leaf(lc, new_wp);
138
139	path = NULL;
140	if (item->client != NULL && item->client->session == NULL)
141		envent = environ_find(item->client->environ, "PATH");
142	else
143		envent = environ_find(s->environ, "PATH");
144	if (envent != NULL)
145		path = envent->value;
146
147	env = environ_for_session(s, 0);
148	if (window_pane_spawn(new_wp, argc, argv, path, shell, cwd, env,
149	    s->tio, &cause) != 0) {
150		environ_free(env);
151		goto error;
152	}
153	environ_free(env);
154
155	layout_fix_panes(w, w->sx, w->sy);
156	server_redraw_window(w);
157
158	if (!args_has(args, 'd')) {
159		window_set_active_pane(w, new_wp);
160		session_select(s, wl->idx);
161		cmd_find_from_session(current, s);
162		server_redraw_session(s);
163	} else
164		server_status_session(s);
165
166	if (args_has(args, 'P')) {
167		if ((template = args_get(args, 'F')) == NULL)
168			template = SPLIT_WINDOW_TEMPLATE;
169		cp = format_single(item, template, c, s, wl, new_wp);
170		cmdq_print(item, "%s", cp);
171		free(cp);
172	}
173	notify_window("window-layout-changed", w);
174
175	if (to_free != NULL)
176		free((void *)to_free);
177
178	cmd_find_from_winlink_pane(&fs, wl, new_wp);
179	hooks_insert(s->hooks, item, &fs, "after-split-window");
180
181	return (CMD_RETURN_NORMAL);
182
183error:
184	if (new_wp != NULL) {
185		layout_close_pane(new_wp);
186		window_remove_pane(w, new_wp);
187	}
188	cmdq_error(item, "create pane failed: %s", cause);
189	free(cause);
190
191	if (to_free != NULL)
192		free((void *)to_free);
193	return (CMD_RETURN_ERROR);
194}
195