/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the utilities for tabview.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * Raymond Lee <raymond@appcoast.com>
 * Michael Yoshitaka Erlewine <mitcho@mitcho.com>
 * Tim Taubert <tim.taubert@gmx.de>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

function createEmptyGroupItem(contentWindow, width, height, padding, noAnimation) {
  let pageBounds = contentWindow.Items.getPageBounds();
  pageBounds.inset(padding, padding);

  let box = new contentWindow.Rect(pageBounds);
  box.width = width;
  box.height = height;
  
  let immediately = noAnimation ? true: false;
  let emptyGroupItem = 
    new contentWindow.GroupItem([], { bounds: box, immediately: immediately });

  return emptyGroupItem;
}

// ----------
function afterAllTabItemsUpdated(callback, win) {
  win = win || window;
  let tabItems = win.document.getElementById("tab-view").contentWindow.TabItems;

  for (let a = 0; a < win.gBrowser.tabs.length; a++) {
    let tabItem = win.gBrowser.tabs[a]._tabViewTabItem;
    if (tabItem)
      tabItems._update(win.gBrowser.tabs[a]);
  }
  callback();
}

// ---------
function newWindowWithTabView(callback) {
  let win = window.openDialog(getBrowserURL(), "_blank", 
                              "chrome,all,dialog=no,height=800,width=800");
  let onLoad = function() {
    win.removeEventListener("load", onLoad, false);
    let onShown = function() {
      win.removeEventListener("tabviewshown", onShown, false);
      callback(win);
    };
    win.addEventListener("tabviewshown", onShown, false);
    win.TabView.toggle();
  }
  win.addEventListener("load", onLoad, false);
}

// ----------
function afterAllTabsLoaded(callback, win) {
  win = win || window;

  let stillToLoad = 0;

  function onLoad() {
    this.removeEventListener("load", onLoad, true);
    stillToLoad--;
    if (!stillToLoad)
      callback();
  }

  for (let a = 0; a < win.gBrowser.tabs.length; a++) {
    let browser = win.gBrowser.tabs[a].linkedBrowser;
    if (browser.contentDocument.readyState != "complete") {
      stillToLoad++;
      browser.addEventListener("load", onLoad, true);
    }
  }

  if (!stillToLoad)
    callback();
}

// ----------
function showTabView(callback, win) {
  win = win || window;

  if (win.TabView.isVisible()) {
    callback();
    return;
  }

  whenTabViewIsShown(callback, win);
  win.TabView.show();
}

// ----------
function hideTabView(callback, win) {
  win = win || window;

  if (!win.TabView.isVisible()) {
    callback();
    return;
  }

  whenTabViewIsHidden(callback, win);
  win.TabView.hide();
}

// ----------
function whenTabViewIsHidden(callback, win) {
  win = win || window;

  if (!win.TabView.isVisible()) {
    callback();
    return;
  }

  win.addEventListener('tabviewhidden', function () {
    win.removeEventListener('tabviewhidden', arguments.callee, false);
    callback();
  }, false);
}

// ----------
function whenTabViewIsShown(callback, win) {
  win = win || window;

  if (win.TabView.isVisible()) {
    callback();
    return;
  }

  win.addEventListener('tabviewshown', function () {
    win.removeEventListener('tabviewshown', arguments.callee, false);
    callback();
  }, false);
}