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1/* $OpenBSD: cmd-split-window.c,v 1.116 2025/04/09 07:03:04 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:de:fF:hIl:p:Pt:vZ", 0, -1, NULL },
44 .usage = "[-bdefhIPvZ] [-c start-directory] [-e environment] "
45 "[-F format] [-l size] " CMD_TARGET_PANE_USAGE
46 " [shell-command [argument ...]]",
47
48 .target = { 't', CMD_FIND_PANE, 0 },
49
50 .flags = 0,
51 .exec = cmd_split_window_exec
52};
53
54static enum cmd_retval
55cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
56{
57 struct args *args = cmd_get_args(self);
58 struct cmd_find_state *current = cmdq_get_current(item);
59 struct cmd_find_state *target = cmdq_get_target(item);
60 struct spawn_context sc = { 0 };
61 struct client *tc = cmdq_get_target_client(item);
62 struct session *s = target->s;
63 struct winlink *wl = target->wl;
64 struct window *w = wl->window;
65 struct window_pane *wp = target->wp, *new_wp;
66 enum layout_type type;
67 struct layout_cell *lc;
68 struct cmd_find_state fs;
69 int size, flags, input;
70 const char *template;
71 char *cause = NULL, *cp;
72 struct args_value *av;
73 u_int count = args_count(args), curval = 0;
74
75 type = LAYOUT_TOPBOTTOM;
76 if (args_has(args, 'h'))
77 type = LAYOUT_LEFTRIGHT;
78
79 /* If the 'p' flag is dropped then this bit can be moved into 'l'. */
80 if (args_has(args, 'l') || args_has(args, 'p')) {
81 if (args_has(args, 'f')) {
82 if (type == LAYOUT_TOPBOTTOM)
83 curval = w->sy;
84 else
85 curval = w->sx;
86 } else {
87 if (type == LAYOUT_TOPBOTTOM)
88 curval = wp->sy;
89 else
90 curval = wp->sx;
91 }
92 }
93
94 size = -1;
95 if (args_has(args, 'l')) {
96 size = args_percentage_and_expand(args, 'l', 0, INT_MAX, curval,
97 item, &cause);
98 } else if (args_has(args, 'p')) {
99 size = args_strtonum_and_expand(args, 'p', 0, 100, item,
100 &cause);
101 if (cause == NULL)
102 size = curval * size / 100;
103 }
104 if (cause != NULL) {
105 cmdq_error(item, "size %s", cause);
106 free(cause);
107 return (CMD_RETURN_ERROR);
108 }
109
110 window_push_zoom(wp->window, 1, args_has(args, 'Z'));
111 input = (args_has(args, 'I') && count == 0);
112
113 flags = 0;
114 if (args_has(args, 'b'))
115 flags |= SPAWN_BEFORE;
116 if (args_has(args, 'f'))
117 flags |= SPAWN_FULLSIZE;
118 if (input || (count == 1 && *args_string(args, 0) == '\0'))
119 flags |= SPAWN_EMPTY;
120
121 lc = layout_split_pane(wp, type, size, flags);
122 if (lc == NULL) {
123 cmdq_error(item, "no space for new pane");
124 return (CMD_RETURN_ERROR);
125 }
126
127 sc.item = item;
128 sc.s = s;
129 sc.wl = wl;
130
131 sc.wp0 = wp;
132 sc.lc = lc;
133
134 args_to_vector(args, &sc.argc, &sc.argv);
135 sc.environ = environ_create();
136
137 av = args_first_value(args, 'e');
138 while (av != NULL) {
139 environ_put(sc.environ, av->string, 0);
140 av = args_next_value(av);
141 }
142
143 sc.idx = -1;
144 sc.cwd = args_get(args, 'c');
145
146 sc.flags = flags;
147 if (args_has(args, 'd'))
148 sc.flags |= SPAWN_DETACHED;
149 if (args_has(args, 'Z'))
150 sc.flags |= SPAWN_ZOOM;
151
152 if ((new_wp = spawn_pane(&sc, &cause)) == NULL) {
153 cmdq_error(item, "create pane failed: %s", cause);
154 free(cause);
155 if (sc.argv != NULL)
156 cmd_free_argv(sc.argc, sc.argv);
157 environ_free(sc.environ);
158 return (CMD_RETURN_ERROR);
159 }
160 if (input) {
161 switch (window_pane_start_input(new_wp, item, &cause)) {
162 case -1:
163 server_client_remove_pane(new_wp);
164 layout_close_pane(new_wp);
165 window_remove_pane(wp->window, new_wp);
166 cmdq_error(item, "%s", cause);
167 free(cause);
168 if (sc.argv != NULL)
169 cmd_free_argv(sc.argc, sc.argv);
170 environ_free(sc.environ);
171 return (CMD_RETURN_ERROR);
172 case 1:
173 input = 0;
174 break;
175 }
176 }
177 if (!args_has(args, 'd'))
178 cmd_find_from_winlink_pane(current, wl, new_wp, 0);
179 window_pop_zoom(wp->window);
180 server_redraw_window(wp->window);
181 server_status_session(s);
182
183 if (args_has(args, 'P')) {
184 if ((template = args_get(args, 'F')) == NULL)
185 template = SPLIT_WINDOW_TEMPLATE;
186 cp = format_single(item, template, tc, s, wl, new_wp);
187 cmdq_print(item, "%s", cp);
188 free(cp);
189 }
190
191 cmd_find_from_winlink_pane(&fs, wl, new_wp, 0);
192 cmdq_insert_hook(s, item, &fs, "after-split-window");
193
194 if (sc.argv != NULL)
195 cmd_free_argv(sc.argc, sc.argv);
196 environ_free(sc.environ);
197 if (input)
198 return (CMD_RETURN_WAIT);
199 return (CMD_RETURN_NORMAL);
200}