external/bsd/tmux/dist/cmd-split-window.c

   1 /* Id */
   2
   3 /*
   4  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
   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 void             cmd_split_window_key_binding(struct cmd *, int);
  34 enum cmd_retval  cmd_split_window_exec(struct cmd *, struct cmd_q *);
  35
  36 const struct cmd_entry cmd_split_window_entry = {
  37         "split-window", "splitw",
  38         "c:dF:l:hp:Pt:v", 0, 1,
  39         "[-dhvP] [-c start-directory] [-F format] [-p percentage|-l size] "
  40         CMD_TARGET_PANE_USAGE " [command]",
  41         0,
  42         cmd_split_window_key_binding,
  43         cmd_split_window_exec
  44 };
  45
  46 void
  47 cmd_split_window_key_binding(struct cmd *self, int key)
  48 {
  49         self->args = args_create(0);
  50         if (key == '%')
  51                 args_set(self->args, 'h', NULL);
  52 }
  53
  54 enum cmd_retval
  55 cmd_split_window_exec(struct cmd *self, struct cmd_q *cmdq)
  56 {
  57         struct args             *args = self->args;
  58         struct session          *s;
  59         struct winlink          *wl;
  60         struct window           *w;
  61         struct window_pane      *wp, *new_wp = NULL;
  62         struct environ           env;
  63         const char              *cmd, *shell, *template;
  64         char                    *cause, *new_cause, *cp;
  65         u_int                    hlimit;
  66         int                      size, percentage, cwd, fd = -1;
  67         enum layout_type         type;
  68         struct layout_cell      *lc;
  69         struct client           *c;
  70         struct format_tree      *ft;
  71
  72         if ((wl = cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp)) == NULL)
  73                 return (CMD_RETURN_ERROR);
  74         w = wl->window;
  75         server_unzoom_window(w);
  76
  77         environ_init(&env);
  78         environ_copy(&global_environ, &env);
  79         environ_copy(&s->environ, &env);
  80         server_fill_environ(s, &env);
  81
  82         if (args->argc == 0)
  83                 cmd = options_get_string(&s->options, "default-command");
  84         else
  85                 cmd = args->argv[0];
  86
  87         if (args_has(args, 'c')) {
  88                 ft = format_create();
  89                 if ((c = cmd_find_client(cmdq, NULL, 1)) != NULL)
  90                         format_client(ft, c);
  91                 format_session(ft, s);
  92                 format_winlink(ft, s, s->curw);
  93                 format_window_pane(ft, s->curw->window->active);
  94                 cp = format_expand(ft, args_get(args, 'c'));
  95                 format_free(ft);
  96
  97                 if (cp != NULL && *cp != '\0') {
  98                         fd = open(cp, O_RDONLY|O_DIRECTORY);
  99                         free(cp);
 100                         if (fd == -1) {
 101                                 cmdq_error(cmdq, "bad working directory: %s",
 102                                     strerror(errno));
 103                                 return (CMD_RETURN_ERROR);
 104                         }
 105                 } else if (cp != NULL)
 106                         free(cp);
 107                 cwd = fd;
 108         } else if (cmdq->client != NULL && cmdq->client->session == NULL)
 109                 cwd = cmdq->client->cwd;
 110         else
 111                 cwd = s->cwd;
 112
 113         type = LAYOUT_TOPBOTTOM;
 114         if (args_has(args, 'h'))
 115                 type = LAYOUT_LEFTRIGHT;
 116
 117         size = -1;
 118         if (args_has(args, 'l')) {
 119                 size = args_strtonum(args, 'l', 0, INT_MAX, &cause);
 120                 if (cause != NULL) {
 121                         xasprintf(&new_cause, "size %s", cause);
 122                         free(cause);
 123                         cause = new_cause;
 124                         goto error;
 125                 }
 126         } else if (args_has(args, 'p')) {
 127                 percentage = args_strtonum(args, 'p', 0, INT_MAX, &cause);
 128                 if (cause != NULL) {
 129                         xasprintf(&new_cause, "percentage %s", cause);
 130                         free(cause);
 131                         cause = new_cause;
 132                         goto error;
 133                 }
 134                 if (type == LAYOUT_TOPBOTTOM)
 135                         size = (wp->sy * percentage) / 100;
 136                 else
 137                         size = (wp->sx * percentage) / 100;
 138         }
 139         hlimit = options_get_number(&s->options, "history-limit");
 140
 141         shell = options_get_string(&s->options, "default-shell");
 142         if (*shell == '\0' || areshell(shell))
 143                 shell = _PATH_BSHELL;
 144
 145         if ((lc = layout_split_pane(wp, type, size, 0)) == NULL) {
 146                 cause = xstrdup("pane too small");
 147                 goto error;
 148         }
 149         new_wp = window_add_pane(w, hlimit);
 150         if (window_pane_spawn(
 151             new_wp, cmd, shell, cwd, &env, s->tio, &cause) != 0)
 152                 goto error;
 153         layout_assign_pane(lc, new_wp);
 154
 155         server_redraw_window(w);
 156
 157         if (!args_has(args, 'd')) {
 158                 window_set_active_pane(w, new_wp);
 159                 session_select(s, wl->idx);
 160                 server_redraw_session(s);
 161         } else
 162                 server_status_session(s);
 163
 164         environ_free(&env);
 165
 166         if (args_has(args, 'P')) {
 167                 if ((template = args_get(args, 'F')) == NULL)
 168                         template = SPLIT_WINDOW_TEMPLATE;
 169
 170                 ft = format_create();
 171                 if ((c = cmd_find_client(cmdq, NULL, 1)) != NULL)
 172                         format_client(ft, c);
 173                 format_session(ft, s);
 174                 format_winlink(ft, s, wl);
 175                 format_window_pane(ft, new_wp);
 176
 177                 cp = format_expand(ft, template);
 178                 cmdq_print(cmdq, "%s", cp);
 179                 free(cp);
 180
 181                 format_free(ft);
 182         }
 183         notify_window_layout_changed(w);
 184
 185         if (fd != -1)
 186                 close(fd);
 187         return (CMD_RETURN_NORMAL);
 188
 189 error:
 190         environ_free(&env);
 191         if (new_wp != NULL)
 192                 window_remove_pane(w, new_wp);
 193         cmdq_error(cmdq, "create pane failed: %s", cause);
 194         free(cause);
 195         if (fd != -1)
 196                 close(fd);
 197         return (CMD_RETURN_ERROR);
 198 }