/* $OpenBSD: cmd-break-pane.c,v 1.75 2026/07/23 09:38:27 nicm Exp $ */

/*

 * 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 "tmux.h"

/*

 * Break pane off into a window.

 */

#define BREAK_PANE_TEMPLATE "#{session_name}:#{window_index}.#{pane_index}"

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

const struct cmd_entry cmd_break_pane_entry = {

  .name = "break-pane",

  .alias = "breakp",

  .args = { "abdPF:n:s:t:Wx:X:y:Y:", 0, 0, NULL },

  .usage = "[-abdPW] [-F format] [-n window-name] [-s src-pane] "

     "[-t dst-window] [-x width] [-y height] [-X x-position] "

     "[-Y y-position]",

  .source = { 's', CMD_FIND_PANE, 0 },

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

  .flags = 0,

  .exec = cmd_break_pane_exec

};

static enum cmd_retval

cmd_break_pane_float(struct cmdq_item *item, struct args *args,

    struct window *w, struct window_pane *wp)

{

  struct layout_cell  *lc = wp->layout_cell;

  char      *cause = NULL;

  enum pane_lines    lines = window_get_pane_lines(w);

  struct layout_geometry  *fg = &lc->fg;

  if (window_pane_is_floating(wp)) {

    cmdq_error(item, "pane is already floating");

    return (CMD_RETURN_ERROR);

  }

  if (w->flags & WINDOW_ZOOMED) {

    cmdq_error(item, "can't float a pane while window is zoomed");

    return (CMD_RETURN_ERROR);

  }

  if (layout_floating_args_parse(item, args, lines, w, fg, &cause) != 0) {

    cmdq_error(item, "failed to float pane: %s", cause);

    free(cause);

    return (CMD_RETURN_ERROR);

  }

  layout_remove_tile(w, lc);

  layout_set_size(lc, fg->sx, fg->sy, fg->xoff, fg->yoff);

  lc->flags |= LAYOUT_CELL_FLOATING;

  TAILQ_REMOVE(&w->z_index, wp, zentry);

  TAILQ_INSERT_HEAD(&w->z_index, wp, zentry);

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

    window_set_active_pane(w, wp, 1);

  layout_fix_offsets(w);

  layout_fix_panes(w, NULL);

  events_fire_window("window-layout-changed", w);

  server_redraw_window(w);

  return (CMD_RETURN_NORMAL);

}

static enum cmd_retval

cmd_break_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 client   *tc = cmdq_get_target_client(item);

  struct winlink    *wl = source->wl;

  struct session    *src_s = source->s;

  struct session    *dst_s = target->s;

  struct window_pane  *wp = source->wp;

  struct window   *w = wl->window, *old_w = w;

  char      *cause, *cp;

  int      idx = target->idx, before, old_idx = wl->idx;

  const char    *template, *name = args_get(args, 'n');

  if (wp == w->modal) {

    cmdq_error(item, "pane is modal");

    return (CMD_RETURN_ERROR);

  }

  if (args_has(args, 'W'))

    return (cmd_break_pane_float(item, args, w, wp));

  if (name != NULL && !check_name(name)) {

    cmdq_error(item, "invalid window name: %s", name);

    return (CMD_RETURN_ERROR);

  }

  before = args_has(args, 'b');

  if (args_has(args, 'a') || before) {

    if (target->wl != NULL)

      idx = winlink_shuffle_up(dst_s, target->wl, before);

    else

      idx = winlink_shuffle_up(dst_s, dst_s->curw, before);

    if (idx == -1)

      return (CMD_RETURN_ERROR);

  }

  server_unzoom_window(w);

  if (window_count_panes(w, 1) == 1) {

    if (server_link_window(src_s, wl, dst_s, idx, 0,

        !args_has(args, 'd'), &cause) != 0) {

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

      free(cause);

      return (CMD_RETURN_ERROR);

    }

    if (name != NULL) {

      window_set_name(w, name, 0);

      options_set_number(w->options, "automatic-rename", 0);

    }

    server_unlink_window(src_s, wl);

    wl = winlink_find_by_window(&dst_s->windows, w);

    if (wl == NULL)

      return (CMD_RETURN_ERROR);

    window_fire_pane_moved(wp, old_w, old_idx, w, wl->idx);

    goto out;

  }

  if (idx != -1 && winlink_find_by_index(&dst_s->windows, idx) != NULL) {

    cmdq_error(item, "index in use: %d", idx);

    return (CMD_RETURN_ERROR);

  }

  TAILQ_REMOVE(&w->panes, wp, entry);

  TAILQ_REMOVE(&w->z_index, wp, zentry);

  server_client_remove_pane(wp);

  window_lost_pane(w, wp);

  layout_close_pane(wp);

  w = wp->window = window_create(w->sx, w->sy, w->xpixel, w->ypixel);

  window_add_ref(w, __func__);

  options_set_parent(wp->options, w->options);

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

  TAILQ_INSERT_HEAD(&w->panes, wp, entry);

  TAILQ_INSERT_HEAD(&w->z_index, wp, zentry);

  w->active = wp;

  w->latest = tc;

  free(w->name);

  if (name == NULL)

    w->name = default_window_name(w);

  else {

    w->name = clean_name(name, 0);

    options_set_number(w->options, "automatic-rename", 0);

  }

  window_set_fill_cells(w);

  layout_init(w, wp);

  wp->flags |= PANE_CHANGED;

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

  if (idx == -1)

    idx = -1 - options_get_number(dst_s->options, "base-index");

  wl = session_attach(dst_s, w, idx, &cause); /* can't fail */

  window_remove_ref(w, __func__);

  events_fire_window("window-created", w);

  window_fire_pane_moved(wp, old_w, old_idx, w, wl->idx);

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

    session_select(dst_s, wl->idx);

    cmd_find_from_session(current, dst_s, 0);

  }

  server_redraw_session(src_s);

  if (src_s != dst_s)

    server_redraw_session(dst_s);

  server_status_session_group(src_s);

  if (src_s != dst_s)

    server_status_session_group(dst_s);

out:

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

    if ((template = args_get(args, 'F')) == NULL)

      template = BREAK_PANE_TEMPLATE;

    cp = format_single(item, template, tc, dst_s, wl, wp);

    cmdq_print(item, "%s", cp);

    free(cp);

  }

  return (CMD_RETURN_NORMAL);

}