The Tor Browser: browser/metro/base/content/contenthandlers/PluginHelper.js@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     3  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     4 "use strict";

     6 dump("### PluginHelper.js loaded\n");

     8 /**

     9  * Handle events generated by plugin click-to-play code.

    10  *

    11  * This "PluginBindingAttached" fires when a "pluginProblem" XBL binding is

    12  * created.  This binding overlays plugin content when the plugin is missing,

    13  * blocked, click-to-play, or replaced by a "preview" extension plugin like

    14  * Shumway or PDF.js.

    15  */

    16 var PluginHelper = {

    17   init: function () {

    18     addEventListener("PluginBindingAttached", this, true, true);

    19   },

    21   handleEvent: function handleEvent(aEvent) {

    22     switch (aEvent.type) {

    23       case "PluginBindingAttached":

    24         this.handlePluginBindingAttached(aEvent);

    25         break;

    26     }

    27   },

    29   getPluginMimeType: function (plugin) {

    30     var tagMimetype = plugin.actualType;

    32     if (tagMimetype == "") {

    33       tagMimetype = plugin.type;

    34     }

    35     return tagMimetype;

    36   },

    38   handlePluginBindingAttached: function (aEvent) {

    39     let plugin = aEvent.target;

    40     let doc = plugin.ownerDocument;

    41     let overlay = doc.getAnonymousElementByAttribute(plugin, "anonid", "main");

    42     if (!overlay || overlay._bindingHandled) {

    43       return;

    44     }

    45     overlay._bindingHandled = true;

    47     let eventType = PluginHelper._getBindingType(plugin);

    48     if (!eventType) {

    49       return;

    50     }

    52     switch  (eventType) {

    53       case "PluginPlayPreview": {

    54         // Load the "preview" handler (an extension plugin like Shumway or PDF.js).

    55         let previewContent = doc.getAnonymousElementByAttribute(plugin, "class", "previewPluginContent");

    56         let pluginHost = Cc["@mozilla.org/plugin/host;1"].getService(Ci.nsIPluginHost);

    57         let mimeType = PluginHelper.getPluginMimeType(plugin);

    58         let playPreviewInfo = pluginHost.getPlayPreviewInfo(mimeType);

    60         let iframe = previewContent.getElementsByClassName("previewPluginContentFrame")[0];

    61         if (!iframe) {

    62           // lazy initialization of the iframe

    63           iframe = doc.createElementNS("http://www.w3.org/1999/xhtml", "iframe");

    64           iframe.className = "previewPluginContentFrame";

    65           previewContent.appendChild(iframe);

    66         }

    67         iframe.src = playPreviewInfo.redirectURL;

    68         break;

    69       }

    71       case "PluginNotFound": {

    72         // TODO: Display a message about missing plugins (bug 936907)

    73         break;

    74       }

    75     }

    76   },

    78   // Helper to get the binding handler type from a plugin object

    79   _getBindingType: function(plugin) {

    80     if (!(plugin instanceof Ci.nsIObjectLoadingContent))

    81       return null;

    83     switch (plugin.pluginFallbackType) {

    84       case Ci.nsIObjectLoadingContent.PLUGIN_UNSUPPORTED:

    85         return "PluginNotFound";

    86       case Ci.nsIObjectLoadingContent.PLUGIN_PLAY_PREVIEW:

    87         return "PluginPlayPreview";

    88       default:

    89         // Metro Firefox does not yet support other fallback types.

    90         return null;

    91     }

    92   },

    93 };

    95 PluginHelper.init();

The Tor Browser / file revision