Incorporate Viewer.js to display opendocument formats

media/js/Viewer.js/PluginLoader.js

@@ -0,0 +1,82 @@
+/**
+ * @license
+ * Copyright (C) 2012 KO GmbH <copyright@kogmbh.com>
+ *
+ * @licstart
+ * The JavaScript code in this page is free software: you can redistribute it
+ * and/or modify it under the terms of the GNU Affero General Public License
+ * (GNU AGPL) as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.  The code is distributed
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU AGPL for more details.
+ *
+ * As additional permission under GNU AGPL version 3 section 7, you
+ * may distribute non-source (e.g., minimized or compacted) forms of
+ * that code without the copy of the GNU GPL normally required by
+ * section 4, provided you include this license notice and a URL
+ * through which recipients can access the Corresponding Source.
+ *
+ * As a special exception to the AGPL, any HTML file which merely makes function
+ * calls to this code, and for that purpose includes it by reference shall be
+ * deemed a separate work for copyright law purposes. In addition, the copyright
+ * holders of this code give you permission to combine this code with free
+ * software libraries that are released under the GNU LGPL. You may copy and
+ * distribute such a system following the terms of the GNU AGPL for this code
+ * and the LGPL for the libraries. If you modify this code, you may extend this
+ * exception to your version of the code, but you are not obligated to do so.
+ * If you do not wish to do so, delete this exception statement from your
+ * version.
+ *
+ * This license applies to this entire compilation.
+ * @licend
+ * @source: http://viewerjs.org/
+ * @source: http://github.com/thz/Viewer.js
+ */
+
+/*global document, window, Viewer, ODFViewerPlugin, PDFViewerPlugin*/
+
+var viewer;
+
+function loadPlugin(pluginName, callback) {
+    "use strict";
+    var script, style;
+
+    // Load script
+    script = document.createElement('script');
+    script.async = false;
+    script.onload = callback;
+    script.src = pluginName + '.js';
+    script.type = 'text/javascript';
+    document.getElementsByTagName('head')[0].appendChild(script);
+}
+
+function loadDocument(documentUrl) {
+    "use strict";
+
+    if (documentUrl) {
+        var extension = documentUrl.split('.').pop(),
+            Plugin;
+        extension = extension.toLowerCase();
+        switch (extension) {
+        case 'odt':
+        case 'odp':
+        case 'ods':
+        case 'fodt':
+            loadPlugin('./ODFViewerPlugin', function () {
+                Plugin = ODFViewerPlugin;
+            });
+            break;
+        case 'pdf':
+            loadPlugin('./PDFViewerPlugin', function () {
+                Plugin = PDFViewerPlugin;
+            });
+            break;
+        }
+
+        window.onload = function () {
+            if (Plugin) {
+                viewer = new Viewer(new Plugin());
+            }
+        };
+    }
+}