/**

 * @file

 * Attaches the behaviors for the Overlay parent pages.

 */

(function ($) {

/**

 * Open the overlay, or load content into it, when an admin link is clicked.

 */

Drupal.behaviors.overlayParent = {

  attach: function (context, settings) {

    if (Drupal.overlay.isOpen) {

      Drupal.overlay.makeDocumentUntabbable(context);

    }

    if (this.processed) {

      return;

    }

    this.processed = true;

    $(window)

      // When the hash (URL fragment) changes, open the overlay if needed.

      .bind('hashchange.drupal-overlay', $.proxy(Drupal.overlay, 'eventhandlerOperateByURLFragment'))

      // Trigger the hashchange handler once, after the page is loaded, so that

      // permalinks open the overlay.

      .triggerHandler('hashchange.drupal-overlay');

    $(document)

      // Instead of binding a click event handler to every link we bind one to

      // the document and only handle events that bubble up. This allows other

      // scripts to bind their own handlers to links and also to prevent

      // overlay's handling.

      .bind('click.drupal-overlay mouseup.drupal-overlay', $.proxy(Drupal.overlay, 'eventhandlerOverrideLink'));

  }

};

/**

 * Overlay object for parent windows.

 *

 * Events

 * Overlay triggers a number of events that can be used by other scripts.

 * - drupalOverlayOpen: This event is triggered when the overlay is opened.

 * - drupalOverlayBeforeClose: This event is triggered when the overlay attempts

 *   to close. If an event handler returns false, the close will be prevented.

 * - drupalOverlayClose: This event is triggered when the overlay is closed.

 * - drupalOverlayBeforeLoad: This event is triggered right before a new URL

 *   is loaded into the overlay.

 * - drupalOverlayReady: This event is triggered when the DOM of the overlay

 *   child document is fully loaded.

 * - drupalOverlayLoad: This event is triggered when the overlay is finished

 *   loading.

 * - drupalOverlayResize: This event is triggered when the overlay is being

 *   resized to match the parent window.

 */

Drupal.overlay = Drupal.overlay || {

  isOpen: false,

  isOpening: false,

  isClosing: false,

  isLoading: false

};

Drupal.overlay.prototype = {};

/**

 * Open the overlay.

 *

 * @param url

 *   The URL of the page to open in the overlay.

 *

 * @return

 *   TRUE if the overlay was opened, FALSE otherwise.

 */

Drupal.overlay.open = function (url) {

  // Just one overlay is allowed.

  if (this.isOpen || this.isOpening) {

    return this.load(url);

  }

  this.isOpening = true;

  // Store the original document title.

  this.originalTitle = document.title;

  // Create the dialog and related DOM elements.

  this.create();

  this.isOpening = false;

  this.isOpen = true;

  $(document.documentElement).addClass('overlay-open');

  this.makeDocumentUntabbable();

  // Allow other scripts to respond to this event.

  $(document).trigger('drupalOverlayOpen');

  return this.load(url);

};

/**

 * Create the underlying markup and behaviors for the overlay.

 */

Drupal.overlay.create = function () {

  this.$container = $(Drupal.theme('overlayContainer'))

    .appendTo(document.body);

  // Overlay uses transparent iframes that cover the full parent window.

  // When the overlay is open the scrollbar of the parent window is hidden.

  // Because some browsers show a white iframe background for a short moment

  // while loading a page into an iframe, overlay uses two iframes. By loading

  // the page in a hidden (inactive) iframe the user doesn't see the white

  // background. When the page is loaded the active and inactive iframes

  // are switched.

  this.activeFrame = this.$iframeA = $(Drupal.theme('overlayElement'))

    .appendTo(this.$container);

  this.inactiveFrame = this.$iframeB = $(Drupal.theme('overlayElement'))

    .appendTo(this.$container);

  this.$iframeA.bind('load.drupal-overlay', { self: this.$iframeA[0], sibling: this.$iframeB }, $.proxy(this, 'loadChild'));

  this.$iframeB.bind('load.drupal-overlay', { self: this.$iframeB[0], sibling: this.$iframeA }, $.proxy(this, 'loadChild'));

  // Add a second class "drupal-overlay-open" to indicate these event handlers

  // should only be bound when the overlay is open.

  var eventClass = '.drupal-overlay.drupal-overlay-open';

  $(window)

    .bind('resize' + eventClass, $.proxy(this, 'eventhandlerOuterResize'));

  $(document)

    .bind('drupalOverlayLoad' + eventClass, $.proxy(this, 'eventhandlerOuterResize'))

    .bind('drupalOverlayReady' + eventClass +

          ' drupalOverlayClose' + eventClass, $.proxy(this, 'eventhandlerSyncURLFragment'))

    .bind('drupalOverlayClose' + eventClass, $.proxy(this, 'eventhandlerRefreshPage'))

    .bind('drupalOverlayBeforeClose' + eventClass +

          ' drupalOverlayBeforeLoad' + eventClass +

          ' drupalOverlayResize' + eventClass, $.proxy(this, 'eventhandlerDispatchEvent'));

  if ($('.overlay-displace-top, .overlay-displace-bottom').length) {

    $(document)

      .bind('drupalOverlayResize' + eventClass, $.proxy(this, 'eventhandlerAlterDisplacedElements'))

      .bind('drupalOverlayClose' + eventClass, $.proxy(this, 'eventhandlerRestoreDisplacedElements'));

  }

};

/**

 * Load the given URL into the overlay iframe.

 *

 * Use this method to change the URL being loaded in the overlay if it is

 * already open.

 *

 * @return

 *   TRUE if URL is loaded into the overlay, FALSE otherwise.

 */

Drupal.overlay.load = function (url) {

  if (!this.isOpen) {

    return false;

  }

  // Allow other scripts to respond to this event.

  $(document).trigger('drupalOverlayBeforeLoad');

  $(document.documentElement).addClass('overlay-loading');

  // The contentDocument property is not supported in IE until IE8.

  var iframeDocument = this.inactiveFrame[0].contentDocument || this.inactiveFrame[0].contentWindow.document;

  // location.replace doesn't create a history entry. location.href does.

  // In this case, we want location.replace, as we're creating the history

  // entry using URL fragments.

  iframeDocument.location.replace(url);

  return true;

};

/**

 * Close the overlay and remove markup related to it from the document.

 *

 * @return

 *   TRUE if the overlay was closed, FALSE otherwise.

 */

Drupal.overlay.close = function () {

  // Prevent double execution when close is requested more than once.

  if (!this.isOpen || this.isClosing) {

    return false;

  }

  // Allow other scripts to respond to this event.

  var event = $.Event('drupalOverlayBeforeClose');

  $(document).trigger(event);

  // If a handler returned false, the close will be prevented.

  if (event.isDefaultPrevented()) {

    return false;

  }

  this.isClosing = true;

  this.isOpen = false;

  $(document.documentElement).removeClass('overlay-open');

  // Restore the original document title.

  document.title = this.originalTitle;

  this.makeDocumentTabbable();

  // Allow other scripts to respond to this event.

  $(document).trigger('drupalOverlayClose');

  // When the iframe is still loading don't destroy it immediately but after

  // the content is loaded (see Drupal.overlay.loadChild).

  if (!this.isLoading) {

    this.destroy();

    this.isClosing = false;

  }

  return true;

};

/**

 * Destroy the overlay.

 */

Drupal.overlay.destroy = function () {

  $([document, window]).unbind('.drupal-overlay-open');

  this.$container.remove();

  this.$container = null;

  this.$iframeA = null;

  this.$iframeB = null;

  this.iframeWindow = null;

};

/**

 * Redirect the overlay parent window to the given URL.

 *

 * @param url

 *   Can be an absolute URL or a relative link to the domain root.

 */

Drupal.overlay.redirect = function (url) {

  // Create a native Link object, so we can use its object methods.

  var link = $(url.link(url)).get(0);

  // If the link is already open, force the hashchange event to simulate reload.

  if (window.location.href == link.href) {

    $(window).triggerHandler('hashchange.drupal-overlay');

  }

  window.location.href = link.href;

  return true;

};

/**

 * Bind the child window.

 *

 * Note that this function is fired earlier than Drupal.overlay.loadChild.

 */

Drupal.overlay.bindChild = function (iframeWindow, isClosing) {

  this.iframeWindow = iframeWindow;

  // We are done if the child window is closing.

  if (isClosing || this.isClosing || !this.isOpen) {

    return;

  }

  // Allow other scripts to respond to this event.

  $(document).trigger('drupalOverlayReady');

};

/**

 * Event handler: load event handler for the overlay iframe.

 *

 * @param event

 *   Event being triggered, with the following restrictions:

 *   - event.type: load

 *   - event.currentTarget: iframe

 */

Drupal.overlay.loadChild = function (event) {

  var iframe = event.data.self;

  var iframeDocument = iframe.contentDocument || iframe.contentWindow.document;

  var iframeWindow = iframeDocument.defaultView || iframeDocument.parentWindow;

  if (iframeWindow.location == 'about:blank') {

    return;

  }

  this.isLoading = false;

  $(document.documentElement).removeClass('overlay-loading');

  event.data.sibling.removeClass('overlay-active').attr({ 'tabindex': -1 });

  // Only continue when overlay is still open and not closing.

  if (this.isOpen && !this.isClosing) {

    // And child document is an actual overlayChild.

    if (iframeWindow.Drupal && iframeWindow.Drupal.overlayChild) {

      // Replace the document title with title of iframe.

      document.title = iframeWindow.document.title;

      this.activeFrame = $(iframe)

        .addClass('overlay-active')

        // Add a title attribute to the iframe for accessibility.

        .attr('title', Drupal.t('@title dialog', { '@title': iframeWindow.jQuery('#overlay-title').text() })).removeAttr('tabindex');

      this.inactiveFrame = event.data.sibling;

      // Load an empty document into the inactive iframe.

      (this.inactiveFrame[0].contentDocument || this.inactiveFrame[0].contentWindow.document).location.replace('about:blank');

      // Move the focus to just before the "skip to main content" link inside

      // the overlay.

      this.activeFrame.focus();

      var skipLink = iframeWindow.jQuery('a:first');

      Drupal.overlay.setFocusBefore(skipLink, iframeWindow.document);

      // Allow other scripts to respond to this event.

      $(document).trigger('drupalOverlayLoad');

    }

    else {

      window.location = iframeWindow.location.href.replace(/([?&]?)render=overlay&?/g, '$1').replace(/\?$/, '');

    }

  }

  else {

    this.destroy();

  }

};

/**

 * Creates a placeholder element to receive document focus.

 *

 * Setting the document focus to a link will make it visible, even if it's a

 * "skip to main content" link that should normally be visible only when the

 * user tabs to it. This function can be used to set the document focus to

 * just before such an invisible link.

 *

 * @param $element

 *   The jQuery element that should receive focus on the next tab press.

 * @param document

 *   The iframe window element to which the placeholder should be added. The

 *   placeholder element has to be created inside the same iframe as the element

 *   it precedes, to keep IE happy. (http://bugs.jquery.com/ticket/4059)

 */

Drupal.overlay.setFocusBefore = function ($element, document) {

  // Create an anchor inside the placeholder document.

  var placeholder = document.createElement('a');

  var $placeholder = $(placeholder).addClass('element-invisible').attr('href', '#');

  // Put the placeholder where it belongs, and set the document focus to it.

  $placeholder.insertBefore($element);

  $placeholder.focus();

  // Make the placeholder disappear as soon as it loses focus, so that it

  // doesn't appear in the tab order again.

  $placeholder.one('blur', function () {

    $(this).remove();

  });

};

/**

 * Check if the given link is in the administrative section of the site.

 *

 * @param url

 *   The URL to be tested.

 *

 * @return boolean

 *   TRUE if the URL represents an administrative link, FALSE otherwise.

 */

Drupal.overlay.isAdminLink = function (url) {

  if (!Drupal.urlIsLocal(url)) {

    return false;

  }

  var path = this.getPath(url);

  // Turn the list of administrative paths into a regular expression.

  if (!this.adminPathRegExp) {

    var prefix = '';

    if (Drupal.settings.overlay.pathPrefixes.length) {

      // Allow path prefixes used for language negatiation followed by slash,

      // and the empty string.

      prefix = '(' + Drupal.settings.overlay.pathPrefixes.join('/|') + '/|)';

    }

    var adminPaths = '^' + prefix + '(' + Drupal.settings.overlay.paths.admin.replace(/\s+/g, '|') + ')$';

    var nonAdminPaths = '^' + prefix + '(' + Drupal.settings.overlay.paths.non_admin.replace(/\s+/g, '|') + ')$';

    adminPaths = adminPaths.replace(/\*/g, '.*');

    nonAdminPaths = nonAdminPaths.replace(/\*/g, '.*');

    this.adminPathRegExp = new RegExp(adminPaths);

    this.nonAdminPathRegExp = new RegExp(nonAdminPaths);

  }

  return this.adminPathRegExp.exec(path) && !this.nonAdminPathRegExp.exec(path);

};

/**

 * Determine whether a link is external to the site.

 *

 * Deprecated. Use Drupal.urlIsLocal() instead.

 *

 * @param url

 *   The URL to be tested.

 *

 * @return boolean

 *   TRUE if the URL is external to the site, FALSE otherwise.

 */

Drupal.overlay.isExternalLink = function (url) {