/* $OpenBSD$ */

/*
* Copyright (c) 2009 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 <stdlib.h>

#include "tmux.h"

/*
* Switch window to selected layout.
*/

static enum cmd_retval  cmd_select_layout_exec(struct cmd *,
                           struct cmdq_item *);

const struct cmd_entry cmd_select_layout_entry = {
       .name = "select-layout",
       .alias = "selectl",

       .args = { "Enopt:", 0, 1, NULL },
       .usage = "[-Enop] " CMD_TARGET_PANE_USAGE " [layout-name]",

       .target = { 't', CMD_FIND_PANE, 0 },

       .flags = CMD_AFTERHOOK,
       .exec = cmd_select_layout_exec
};

const struct cmd_entry cmd_next_layout_entry = {
       .name = "next-layout",
       .alias = "nextl",

       .args = { "t:", 0, 0, NULL },
       .usage = CMD_TARGET_WINDOW_USAGE,

       .target = { 't', CMD_FIND_WINDOW, 0 },

       .flags = CMD_AFTERHOOK,
       .exec = cmd_select_layout_exec
};

const struct cmd_entry cmd_previous_layout_entry = {
       .name = "previous-layout",
       .alias = "prevl",

       .args = { "t:", 0, 0, NULL },
       .usage = CMD_TARGET_WINDOW_USAGE,

       .target = { 't', CMD_FIND_WINDOW, 0 },

       .flags = CMD_AFTERHOOK,
       .exec = cmd_select_layout_exec
};

static enum cmd_retval
cmd_select_layout_exec(struct cmd *self, struct cmdq_item *item)
{
       struct args             *args = cmd_get_args(self);
       struct cmd_find_state   *target = cmdq_get_target(item);
       struct winlink          *wl = target->wl;
       struct window           *w = wl->window;
       struct window_pane      *wp = target->wp;
       const char              *layoutname;
       char                    *oldlayout, *cause;
       int                      next, previous, layout;

       server_unzoom_window(w);

       next = (cmd_get_entry(self) == &cmd_next_layout_entry);
       if (args_has(args, 'n'))
               next = 1;
       previous = (cmd_get_entry(self) == &cmd_previous_layout_entry);
       if (args_has(args, 'p'))
               previous = 1;

       oldlayout = w->old_layout;
       w->old_layout = layout_dump(w->layout_root);

       if (next || previous) {
               if (next)
                       layout_set_next(w);
               else
                       layout_set_previous(w);
               goto changed;
       }

       if (args_has(args, 'E')) {
               layout_spread_out(wp);
               goto changed;
       }

       if (args_count(args) != 0)
               layoutname = args_string(args, 0);
       else if (args_has(args, 'o'))
               layoutname = oldlayout;
       else
               layoutname = NULL;

       if (!args_has(args, 'o')) {
               if (layoutname == NULL)
                       layout = w->lastlayout;
               else
                       layout = layout_set_lookup(layoutname);
               if (layout != -1) {
                       layout_set_select(w, layout);
                       goto changed;
               }
       }

       if (layoutname != NULL) {
               if (layout_parse(w, layoutname, &cause) == -1) {
                       cmdq_error(item, "%s: %s", cause, layoutname);
                       free(cause);
                       goto error;
               }
               goto changed;
       }

       free(oldlayout);
       return (CMD_RETURN_NORMAL);

changed:
       free(oldlayout);
       recalculate_sizes();
       server_redraw_window(w);
       notify_window("window-layout-changed", w);
       return (CMD_RETURN_NORMAL);

error:
       free(w->old_layout);
       w->old_layout = oldlayout;
       return (CMD_RETURN_ERROR);
}