/* $OpenBSD$ */

/*

 * Copyright (c) 2011 George Nachman <tmux@georgester.com>

 * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>

 *

 * 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 <string.h>

#include <unistd.h>

#include "tmux.h"

/*

 * Join or move a pane into another (like split/swap/kill).

 */

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

const struct cmd_entry cmd_join_pane_entry = {

  .name = "join-pane",

  .alias = "joinp",

  .args = { "bdfhvp:l:s:t:", 0, 0, NULL },

  .usage = "[-bdfhv] [-l size] " CMD_SRCDST_PANE_USAGE,

  .source = { 's', CMD_FIND_PANE, CMD_FIND_DEFAULT_MARKED },

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

  .flags = 0,

  .exec = cmd_join_pane_exec

};

const struct cmd_entry cmd_move_pane_entry = {

  .name = "move-pane",

  .alias = "movep",

  .args = { "bdfhvp:l:s:t:", 0, 0, NULL },

  .usage = "[-bdfhv] [-l size] " CMD_SRCDST_PANE_USAGE,

  .source = { 's', CMD_FIND_PANE, CMD_FIND_DEFAULT_MARKED },

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

  .flags = 0,

  .exec = cmd_join_pane_exec

};

static enum cmd_retval

cmd_join_pane_exec(struct cmd *self, struct cmdq_item *item)

{

  struct args   *args = cmd_get_args(self);

  struct cmd_find_state *current = cmdq_get_current(item);

  struct cmd_find_state *target = cmdq_get_target(item);

  struct cmd_find_state *source = cmdq_get_source(item);

  struct session    *dst_s;

  struct winlink    *src_wl, *dst_wl;

  struct window   *src_w, *dst_w;

  struct window_pane  *src_wp, *dst_wp;

  char      *cause = NULL;

  int      size, dst_idx;

  int      flags;

  enum layout_type   type;

  struct layout_cell  *lc;

  u_int      curval = 0;

  dst_s = target->s;

  dst_wl = target->wl;

  dst_wp = target->wp;

  dst_w = dst_wl->window;

  dst_idx = dst_wl->idx;

  server_unzoom_window(dst_w);

  src_wl = source->wl;

  src_wp = source->wp;

  src_w = src_wl->window;

  server_unzoom_window(src_w);

  if (src_wp == dst_wp) {

    cmdq_error(item, "source and target panes must be different");

    return (CMD_RETURN_ERROR);

  }

  type = LAYOUT_TOPBOTTOM;

  if (args_has(args, 'h'))

    type = LAYOUT_LEFTRIGHT;

  /* If the 'p' flag is dropped then this bit can be moved into 'l'. */

  if (args_has(args, 'l') || args_has(args, 'p')) {

    if (args_has(args, 'f')) {

      if (type == LAYOUT_TOPBOTTOM)

        curval = dst_w->sy;

      else

        curval = dst_w->sx;

    } else {

      if (type == LAYOUT_TOPBOTTOM)

        curval = dst_wp->sy;

      else

        curval = dst_wp->sx;

    }

  }

  size = -1;

  if (args_has(args, 'l')) {

    size = args_percentage_and_expand(args, 'l', 0, INT_MAX, curval,

         item, &cause);

  } else if (args_has(args, 'p')) {

    size = args_strtonum_and_expand(args, 'l', 0, 100, item,

         &cause);

    if (cause == NULL)

      size = curval * size / 100;

  }

  if (cause != NULL) {

    cmdq_error(item, "size %s", cause);

    free(cause);

    return (CMD_RETURN_ERROR);

  }

  flags = 0;

  if (args_has(args, 'b'))

    flags |= SPAWN_BEFORE;

  if (args_has(args, 'f'))

    flags |= SPAWN_FULLSIZE;

  lc = layout_split_pane(dst_wp, type, size, flags);

  if (lc == NULL) {

    cmdq_error(item, "create pane failed: pane too small");

    return (CMD_RETURN_ERROR);

  }

  layout_close_pane(src_wp);

  server_client_remove_pane(src_wp);

  window_lost_pane(src_w, src_wp);

  TAILQ_REMOVE(&src_w->panes, src_wp, entry);

  src_wp->window = dst_w;

  options_set_parent(src_wp->options, dst_w->options);

  src_wp->flags |= (PANE_STYLECHANGED|PANE_THEMECHANGED);

  if (flags & SPAWN_BEFORE)

    TAILQ_INSERT_BEFORE(dst_wp, src_wp, entry);

  else

    TAILQ_INSERT_AFTER(&dst_w->panes, dst_wp, src_wp, entry);

  layout_assign_pane(lc, src_wp, 0);

  colour_palette_from_option(&src_wp->palette, src_wp->options);

  recalculate_sizes();

  server_redraw_window(src_w);

  server_redraw_window(dst_w);

  if (!args_has(args, 'd')) {

    window_set_active_pane(dst_w, src_wp, 1);

    session_select(dst_s, dst_idx);

    cmd_find_from_session(current, dst_s, 0);

    server_redraw_session(dst_s);

  } else

    server_status_session(dst_s);

  if (window_count_panes(src_w) == 0)

    server_kill_window(src_w, 1);

  else

    notify_window("window-layout-changed", src_w);

  notify_window("window-layout-changed", dst_w);

  return (CMD_RETURN_NORMAL);

}