PC World 2008 September/PCWorld_2008-09_cd.bin/v cisle/sadanastroju/delicious_bookmarks-2.0.64-fx.xpi/chrome/deliciousBookmarks.jar/content/yDisableExtensions.js

Text File | 2008-06-19 | 5.6 KB | 166 lines

/* YBookmarks extension ID. */
const YBOOKMARKS_ID = "{2fa4ed95-0317-4c6a-a74c-5f3e3912c1f9}";
/* IDs of extensions that are incompatible with YBookmarks. */
const Y_BLOCK_LIST =
   ["{5a2b4e34-ce62-42e9-a658-06ba4490adf8}"]; //classic del.icio.us
const Y_ID_PREFIX = "urn:mozilla:item:";
/* property used to flag disabled extensions. */
const Y_DISABLED_PROPERTY = "http://www.mozilla.org/2004/em-rdf#userDisabled";

/**
 * Handles showing a list of all incompatible extensions to the user, and
 * disabling all of them, or alternatively disabling YBookmarks. This is meant
 * to prevent problems such as having more than one extension writing to the
 * bookmarks datasource.
 */
var yDisableExtensions = {
   /* list of incompatible extensions. */
   _blockList : null,

   /**
    * Look for extensions that are known to be incompatible with YBookmarks. If
    * any are found, show a dialog to prompt the user for action.
    * @return an object with one attribute: foundList, holding the array of
    * found incompatible extensions
    */
   getIncompatibleExtensions: function() {
      var result = new Object();
      var em =
         Components.classes["@mozilla.org/extensions/manager;1"].
            getService(Components.interfaces.nsIExtensionManager);
      var extensionList =
         em.getItemList(Components.interfaces.nsIUpdateItem.TYPE_EXTENSION, {});
      var foundList = new Array();
      var extId;

      yDebug.print("Looking for incompatible extensions.", YB_LOG_MESSAGE);

      for (var i = 0; i < extensionList.length; i++) {
         extId = extensionList[i].id;

         for (var j = 0; j < Y_BLOCK_LIST.length; j++) {
            if (Y_BLOCK_LIST[j] == extId) {
               if (this._isEnabled(extId, em)) {
                  foundList.push(extensionList[i]);
               }

               break;
            }
         }
      }

      yDebug.print(
         "Found " + foundList.length + " incompatible extensions.",
         YB_LOG_MESSAGE);

      result.foundList = foundList;
      return result;
   },

   /**
    * Determine if an extension is enabled.
    * @param extensionId the ID of the extension.
    * @param em the extension manager component.
    * @return true if the extension is enabled. false otherwise.
    */
   _isEnabled: function(extensionId, em) {
      var result = true;
      var rs =
         Components.classes["@mozilla.org/rdf/rdf-service;1"].
            getService(Components.interfaces.nsIRDFService);
      var extensionDS = em.datasource;
      var resourceId = rs.GetResource(Y_ID_PREFIX + extensionId);
      var propertyDisabled = rs.GetResource(Y_DISABLED_PROPERTY);
      var resourceDisabled =
         extensionDS.GetTarget(resourceId, propertyDisabled, true);

      /* if the property is not set, the extension is enabled. */
      if (resourceDisabled) {
         resourceDisabled.QueryInterface(Components.interfaces.nsIRDFLiteral);
         result = (resourceDisabled.Value != "true");
      }

      return result;
   },

   /**
    * Initializes the dialog by filling the incompatible extension list.
    * @return returns true for success.
    */
   init : function() {
      var extensionList = document.getElementById("extension-list");
      var insertedItem;

      this._blockList = window.arguments[0];

      for (var i = 0; i < this._blockList.length; i++) {
         insertedItem = extensionList.appendItem(
            this._blockList[i].name, this._blockList[i].id);
        insertedItem.setAttribute("class", "listitem-iconic");
        insertedItem.setAttribute("image", this._blockList[i].iconURL);
      }

      return true;
   },

   /**
    * Disables all incompatible extensions and prompts the user to restart.
    * @return returns true for success.
    */
   disableExtensions : function() {
      yDebug.print("Disabling incompatible extensions.", YB_LOG_MESSAGE);
      var em =
         Components.classes["@mozilla.org/extensions/manager;1"].
            getService(Components.interfaces.nsIExtensionManager);
      var os =
         Components.classes["@mozilla.org/observer-service;1"].
            getService(Components.interfaces.nsIObserverService);

      for (var i = 0; i < this._blockList.length; i++) {
         em.disableItem(this._blockList[i].id);
      }

      os.notifyObservers(null, "ybookmark.disableExtension", "accept");

      return true;
   },

   /**
    * Cancels the incompatible extension dialog. It notifies an observer to
    * disable this extension.
    * @return returns true for success.
    */
   cancelDialog : function() {
     var os = Components.classes["@mozilla.org/observer-service;1"].
                  getService(Components.interfaces.nsIObserverService);
     os.notifyObservers(null, "ybookmark.disableExtension", "cancel");

     return true;
   },

   /**
    * Disables the Ybookmarks extension and prompts the user to restart.
    * @return returns true for success.
    */
   disableYBookmarks : function() {
     var em =
        Components.classes["@mozilla.org/extensions/manager;1"].
           getService(Components.interfaces.nsIExtensionManager);

      em.disableItem(YBOOKMARKS_ID);
   },

    /**
    * Uninstalls the Ybookmarks extension
    */
    uninstallYBookmarks : function() {
        var em =
           Components.classes["@mozilla.org/extensions/manager;1"].
              getService(Components.interfaces.nsIExtensionManager);

        em.uninstallItem(YBOOKMARKS_ID);
    },

};