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cmd-split-window.c revision 1.3 
      1 /* $OpenBSD$ */
      2 
      3 /*
      4  * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott (at) 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 <stdlib.h>
     24 #include <string.h>
     25 #include <unistd.h>
     26 
     27 #include "tmux.h"
     28 
     29 /*
     30  * Split a window (add a new pane).
     31  */
     32 
     33 #define SPLIT_WINDOW_TEMPLATE "#{session_name}:#{window_index}.#{pane_index}"
     34 
     35 enum cmd_retval	 cmd_split_window_exec(struct cmd *, struct cmd_q *);
     36 
     37 const struct cmd_entry cmd_split_window_entry = {
     38 	.name = "split-window",
     39 	.alias = "splitw",
     40 
     41 	.args = { "bc:dF:l:hp:Pt:v", 0, -1 },
     42 	.usage = "[-bdhvP] [-c start-directory] [-F format] "
     43 		 "[-p percentage|-l size] " CMD_TARGET_PANE_USAGE " [command]",
     44 
     45 	.tflag = CMD_PANE,
     46 
     47 	.flags = 0,
     48 	.exec = cmd_split_window_exec
     49 };
     50 
     51 enum cmd_retval
     52 cmd_split_window_exec(struct cmd *self, struct cmd_q *cmdq)
     53 {
     54 	struct args		*args = self->args;
     55 	struct session		*s = cmdq->state.tflag.s;
     56 	struct winlink		*wl = cmdq->state.tflag.wl;
     57 	struct window		*w = wl->window;
     58 	struct window_pane	*wp = cmdq->state.tflag.wp, *new_wp = NULL;
     59 	struct environ		*env;
     60 	const char		*cmd, *path, *shell, *template, *cwd, *to_free;
     61 	char		       **argv, *cause, *new_cause, *cp;
     62 	u_int			 hlimit;
     63 	int			 argc, size, percentage;
     64 	enum layout_type	 type;
     65 	struct layout_cell	*lc;
     66 	struct format_tree	*ft;
     67 	struct environ_entry	*envent;
     68 
     69 	server_unzoom_window(w);
     70 
     71 	env = environ_create();
     72 	environ_copy(global_environ, env);
     73 	environ_copy(s->environ, env);
     74 	server_fill_environ(s, env);
     75 
     76 	if (args->argc == 0) {
     77 		cmd = options_get_string(s->options, "default-command");
     78 		if (cmd != NULL && *cmd != '\0') {
     79 			argc = 1;
     80 			argv = __UNCONST(&cmd);
     81 		} else {
     82 			argc = 0;
     83 			argv = NULL;
     84 		}
     85 	} else {
     86 		argc = args->argc;
     87 		argv = args->argv;
     88 	}
     89 
     90 	to_free = NULL;
     91 	if (args_has(args, 'c')) {
     92 		ft = format_create(cmdq, 0);
     93 		format_defaults(ft, cmdq->state.c, s, NULL, NULL);
     94 		to_free = cwd = format_expand(ft, args_get(args, 'c'));
     95 		format_free(ft);
     96 	} else if (cmdq->client != NULL && cmdq->client->session == NULL)
     97 		cwd = cmdq->client->cwd;
     98 	else
     99 		cwd = s->cwd;
    100 
    101 	type = LAYOUT_TOPBOTTOM;
    102 	if (args_has(args, 'h'))
    103 		type = LAYOUT_LEFTRIGHT;
    104 
    105 	size = -1;
    106 	if (args_has(args, 'l')) {
    107 		size = args_strtonum(args, 'l', 0, INT_MAX, &cause);
    108 		if (cause != NULL) {
    109 			xasprintf(&new_cause, "size %s", cause);
    110 			free(cause);
    111 			cause = new_cause;
    112 			goto error;
    113 		}
    114 	} else if (args_has(args, 'p')) {
    115 		percentage = args_strtonum(args, 'p', 0, INT_MAX, &cause);
    116 		if (cause != NULL) {
    117 			xasprintf(&new_cause, "percentage %s", cause);
    118 			free(cause);
    119 			cause = new_cause;
    120 			goto error;
    121 		}
    122 		if (type == LAYOUT_TOPBOTTOM)
    123 			size = (wp->sy * percentage) / 100;
    124 		else
    125 			size = (wp->sx * percentage) / 100;
    126 	}
    127 	hlimit = options_get_number(s->options, "history-limit");
    128 
    129 	shell = options_get_string(s->options, "default-shell");
    130 	if (*shell == '\0' || areshell(shell))
    131 		shell = _PATH_BSHELL;
    132 
    133 	lc = layout_split_pane(wp, type, size, args_has(args, 'b'));
    134 	if (lc == NULL) {
    135 		cause = xstrdup("pane too small");
    136 		goto error;
    137 	}
    138 	new_wp = window_add_pane(w, hlimit);
    139 	layout_assign_pane(lc, new_wp);
    140 
    141 	path = NULL;
    142 	if (cmdq->client != NULL && cmdq->client->session == NULL)
    143 		envent = environ_find(cmdq->client->environ, "PATH");
    144 	else
    145 		envent = environ_find(s->environ, "PATH");
    146 	if (envent != NULL)
    147 		path = envent->value;
    148 
    149 	if (window_pane_spawn(new_wp, argc, argv, path, shell, cwd, env,
    150 	    s->tio, &cause) != 0)
    151 		goto error;
    152 
    153 	server_redraw_window(w);
    154 
    155 	if (!args_has(args, 'd')) {
    156 		window_set_active_pane(w, new_wp);
    157 		session_select(s, wl->idx);
    158 		server_redraw_session(s);
    159 	} else
    160 		server_status_session(s);
    161 
    162 	environ_free(env);
    163 
    164 	if (args_has(args, 'P')) {
    165 		if ((template = args_get(args, 'F')) == NULL)
    166 			template = SPLIT_WINDOW_TEMPLATE;
    167 
    168 		ft = format_create(cmdq, 0);
    169 		format_defaults(ft, cmdq->state.c, s, wl, new_wp);
    170 
    171 		cp = format_expand(ft, template);
    172 		cmdq_print(cmdq, "%s", cp);
    173 		free(cp);
    174 
    175 		format_free(ft);
    176 	}
    177 	notify_window_layout_changed(w);
    178 
    179 	if (to_free != NULL)
    180 		free(__UNCONST(to_free));
    181 	return (CMD_RETURN_NORMAL);
    182 
    183 error:
    184 	environ_free(env);
    185 	if (new_wp != NULL) {
    186 		layout_close_pane(new_wp);
    187 		window_remove_pane(w, new_wp);
    188 	}
    189 	cmdq_error(cmdq, "create pane failed: %s", cause);
    190 	free(cause);
    191 
    192 	if (to_free != NULL)
    193 		free(__UNCONST(to_free));
    194 	return (CMD_RETURN_ERROR);
    195 }
    196