// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

/**
 * SelectBookmarkDialog controls the user interface for the "Use Bookmark for
 * Home Page" dialog. 
 * 
 * The caller (gMainPane.setHomePageToBookmark in main.js) invokes this dialog
 * with a single argument - a reference to an object with a .urls property and
 * a .names property.  This dialog is responsible for updating the contents of
 * the .urls property with an array of URLs to use as home pages and for
 * updating the .names property with an array of names for those URLs before it
 * closes.
 */ 
var SelectBookmarkDialog = {
  init: function() {
    document.getElementById("bookmarks").place =
      "place:queryType=1&folder=" + PlacesUIUtils.allBookmarksFolderId;

    // Initial update of the OK button.
    this.selectionChanged();
  },

  /** 
   * Update the disabled state of the OK button as the user changes the 
   * selection within the view. 
   */
  selectionChanged: function() {
    var accept = document.documentElement.getButton("accept");
    var bookmarks = document.getElementById("bookmarks");
    var disableAcceptButton = true;
    if (bookmarks.hasSelection) {
      if (!PlacesUtils.nodeIsSeparator(bookmarks.selectedNode))
        disableAcceptButton = false;
    }
    accept.disabled = disableAcceptButton;
  },

  onItemDblClick: function() {
    var bookmarks = document.getElementById("bookmarks");
    var selectedNode = bookmarks.selectedNode;
    if (selectedNode && PlacesUtils.nodeIsURI(selectedNode)) {
      /**
       * The user has double clicked on a tree row that is a link. Take this to
       * mean that they want that link to be their homepage, and close the dialog.
       */
      document.documentElement.getButton("accept").click();
    }
  },

  /**
   * User accepts their selection. Set all the selected URLs or the contents
   * of the selected folder as the list of homepages.
   */
  accept: function() {
    var bookmarks = document.getElementById("bookmarks");
    NS_ASSERT(bookmarks.hasSelection,
              "Should not be able to accept dialog if there is no selected URL!");
    var urls = [];
    var names = [];
    var selectedNode = bookmarks.selectedNode;
    if (PlacesUtils.nodeIsFolder(selectedNode)) {
      var contents = PlacesUtils.getFolderContents(selectedNode.itemId).root;
      var cc = contents.childCount;
      for (var i = 0; i < cc; ++i) {
        var node = contents.getChild(i);
        if (PlacesUtils.nodeIsURI(node)) {
          urls.push(node.uri);
          names.push(node.title);
        }
      }
      contents.containerOpen = false;
    }
    else {
      urls.push(selectedNode.uri);
      names.push(selectedNode.title);
    }
    window.arguments[0].urls = urls;
    window.arguments[0].names = names;
  }
};