michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: "use strict";
michael@0: 
michael@0: dump("### PluginHelper.js loaded\n");
michael@0: 
michael@0: /**
michael@0:  * Handle events generated by plugin click-to-play code.
michael@0:  *
michael@0:  * This "PluginBindingAttached" fires when a "pluginProblem" XBL binding is
michael@0:  * created.  This binding overlays plugin content when the plugin is missing,
michael@0:  * blocked, click-to-play, or replaced by a "preview" extension plugin like
michael@0:  * Shumway or PDF.js.
michael@0:  */
michael@0: var PluginHelper = {
michael@0:   init: function () {
michael@0:     addEventListener("PluginBindingAttached", this, true, true);
michael@0:   },
michael@0: 
michael@0:   handleEvent: function handleEvent(aEvent) {
michael@0:     switch (aEvent.type) {
michael@0:       case "PluginBindingAttached":
michael@0:         this.handlePluginBindingAttached(aEvent);
michael@0:         break;
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   getPluginMimeType: function (plugin) {
michael@0:     var tagMimetype = plugin.actualType;
michael@0: 
michael@0:     if (tagMimetype == "") {
michael@0:       tagMimetype = plugin.type;
michael@0:     }
michael@0:     return tagMimetype;
michael@0:   },
michael@0: 
michael@0:   handlePluginBindingAttached: function (aEvent) {
michael@0:     let plugin = aEvent.target;
michael@0:     let doc = plugin.ownerDocument;
michael@0:     let overlay = doc.getAnonymousElementByAttribute(plugin, "anonid", "main");
michael@0:     if (!overlay || overlay._bindingHandled) {
michael@0:       return;
michael@0:     }
michael@0:     overlay._bindingHandled = true;
michael@0: 
michael@0:     let eventType = PluginHelper._getBindingType(plugin);
michael@0:     if (!eventType) {
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     switch  (eventType) {
michael@0:       case "PluginPlayPreview": {
michael@0:         // Load the "preview" handler (an extension plugin like Shumway or PDF.js).
michael@0:         let previewContent = doc.getAnonymousElementByAttribute(plugin, "class", "previewPluginContent");
michael@0:         let pluginHost = Cc["@mozilla.org/plugin/host;1"].getService(Ci.nsIPluginHost);
michael@0:         let mimeType = PluginHelper.getPluginMimeType(plugin);
michael@0:         let playPreviewInfo = pluginHost.getPlayPreviewInfo(mimeType);
michael@0: 
michael@0:         let iframe = previewContent.getElementsByClassName("previewPluginContentFrame")[0];
michael@0:         if (!iframe) {
michael@0:           // lazy initialization of the iframe
michael@0:           iframe = doc.createElementNS("http://www.w3.org/1999/xhtml", "iframe");
michael@0:           iframe.className = "previewPluginContentFrame";
michael@0:           previewContent.appendChild(iframe);
michael@0:         }
michael@0:         iframe.src = playPreviewInfo.redirectURL;
michael@0:         break;
michael@0:       }
michael@0: 
michael@0:       case "PluginNotFound": {
michael@0:         // TODO: Display a message about missing plugins (bug 936907)
michael@0:         break;
michael@0:       }
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   // Helper to get the binding handler type from a plugin object
michael@0:   _getBindingType: function(plugin) {
michael@0:     if (!(plugin instanceof Ci.nsIObjectLoadingContent))
michael@0:       return null;
michael@0: 
michael@0:     switch (plugin.pluginFallbackType) {
michael@0:       case Ci.nsIObjectLoadingContent.PLUGIN_UNSUPPORTED:
michael@0:         return "PluginNotFound";
michael@0:       case Ci.nsIObjectLoadingContent.PLUGIN_PLAY_PREVIEW:
michael@0:         return "PluginPlayPreview";
michael@0:       default:
michael@0:         // Metro Firefox does not yet support other fallback types.
michael@0:         return null;
michael@0:     }
michael@0:   },
michael@0: };
michael@0: 
michael@0: PluginHelper.init();