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: var PluginHelper = {
michael@0:   showDoorHanger: function(aTab) {
michael@0:     if (!aTab.browser)
michael@0:       return;
michael@0: 
michael@0:     // Even though we may not end up showing a doorhanger, this flag
michael@0:     // lets us know that we've tried to show a doorhanger.
michael@0:     aTab.shouldShowPluginDoorhanger = false;
michael@0: 
michael@0:     let uri = aTab.browser.currentURI;
michael@0: 
michael@0:     // If the user has previously set a plugins permission for this website,
michael@0:     // either play or don't play the plugins instead of showing a doorhanger.
michael@0:     let permValue = Services.perms.testPermission(uri, "plugins");
michael@0:     if (permValue != Services.perms.UNKNOWN_ACTION) {
michael@0:       if (permValue == Services.perms.ALLOW_ACTION)
michael@0:         PluginHelper.playAllPlugins(aTab.browser.contentWindow);
michael@0: 
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     let message = Strings.browser.formatStringFromName("clickToPlayPlugins.message2",
michael@0:                                                        [uri.host], 1);
michael@0:     let buttons = [
michael@0:       {
michael@0:         label: Strings.browser.GetStringFromName("clickToPlayPlugins.activate"),
michael@0:         callback: function(aChecked) {
michael@0:           // If the user checked "Don't ask again", make a permanent exception
michael@0:           if (aChecked)
michael@0:             Services.perms.add(uri, "plugins", Ci.nsIPermissionManager.ALLOW_ACTION);
michael@0: 
michael@0:           PluginHelper.playAllPlugins(aTab.browser.contentWindow);
michael@0:         }
michael@0:       },
michael@0:       {
michael@0:         label: Strings.browser.GetStringFromName("clickToPlayPlugins.dontActivate"),
michael@0:         callback: function(aChecked) {
michael@0:           // If the user checked "Don't ask again", make a permanent exception
michael@0:           if (aChecked)
michael@0:             Services.perms.add(uri, "plugins", Ci.nsIPermissionManager.DENY_ACTION);
michael@0: 
michael@0:           // Other than that, do nothing
michael@0:         }
michael@0:       }
michael@0:     ];
michael@0: 
michael@0:     // Add a checkbox with a "Don't ask again" message if the uri contains a
michael@0:     // host. Adding a permanent exception will fail if host is not present.
michael@0:     let options = uri.host ? { checkbox: Strings.browser.GetStringFromName("clickToPlayPlugins.dontAskAgain") } : {};
michael@0: 
michael@0:     NativeWindow.doorhanger.show(message, "ask-to-play-plugins", buttons, aTab.id, options);
michael@0:   },
michael@0: 
michael@0:   delayAndShowDoorHanger: function(aTab) {
michael@0:     // To avoid showing the doorhanger if there are also visible plugin
michael@0:     // overlays on the page, delay showing the doorhanger to check if
michael@0:     // visible plugins get added in the near future.
michael@0:     if (!aTab.pluginDoorhangerTimeout) {
michael@0:       aTab.pluginDoorhangerTimeout = setTimeout(function() {
michael@0:         if (this.shouldShowPluginDoorhanger) {
michael@0:           PluginHelper.showDoorHanger(this);
michael@0:         }
michael@0:       }.bind(aTab), 500);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   playAllPlugins: function(aContentWindow) {
michael@0:     let cwu = aContentWindow.QueryInterface(Ci.nsIInterfaceRequestor)
michael@0:                             .getInterface(Ci.nsIDOMWindowUtils);
michael@0:     // XXX not sure if we should enable plugins for the parent documents...
michael@0:     let plugins = cwu.plugins;
michael@0:     if (!plugins || !plugins.length)
michael@0:       return;
michael@0: 
michael@0:     plugins.forEach(this.playPlugin);
michael@0:   },
michael@0: 
michael@0:   playPlugin: function(plugin) {
michael@0:     let objLoadingContent = plugin.QueryInterface(Ci.nsIObjectLoadingContent);
michael@0:     if (!objLoadingContent.activated)
michael@0:       objLoadingContent.playPlugin();
michael@0:   },
michael@0: 
michael@0:   stopPlayPreview: function(plugin, playPlugin) {
michael@0:     let objLoadingContent = plugin.QueryInterface(Ci.nsIObjectLoadingContent);
michael@0:     if (objLoadingContent.activated)
michael@0:       return;
michael@0: 
michael@0:     if (playPlugin)
michael@0:       objLoadingContent.playPlugin();
michael@0:     else
michael@0:       objLoadingContent.cancelPlayPreview();
michael@0:   },
michael@0: 
michael@0:   getPluginPreference: function getPluginPreference() {
michael@0:     let pluginDisable = Services.prefs.getBoolPref("plugin.disable");
michael@0:     if (pluginDisable)
michael@0:       return "0";
michael@0: 
michael@0:     let state = Services.prefs.getIntPref("plugin.default.state");
michael@0:     return state == Ci.nsIPluginTag.STATE_CLICKTOPLAY ? "2" : "1";
michael@0:   },
michael@0: 
michael@0:   setPluginPreference: function setPluginPreference(aValue) {
michael@0:     switch (aValue) {
michael@0:       case "0": // Enable Plugins = No
michael@0:         Services.prefs.setBoolPref("plugin.disable", true);
michael@0:         Services.prefs.clearUserPref("plugin.default.state");
michael@0:         break;
michael@0:       case "1": // Enable Plugins = Yes
michael@0:         Services.prefs.clearUserPref("plugin.disable");
michael@0:         Services.prefs.setIntPref("plugin.default.state", Ci.nsIPluginTag.STATE_ENABLED);
michael@0:         break;
michael@0:       case "2": // Enable Plugins = Tap to Play (default)
michael@0:         Services.prefs.clearUserPref("plugin.disable");
michael@0:         Services.prefs.clearUserPref("plugin.default.state");
michael@0:         break;
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   // Copied from /browser/base/content/browser.js
michael@0:   isTooSmall : function (plugin, overlay) {
michael@0:     // Is the <object>'s size too small to hold what we want to show?
michael@0:     let pluginRect = plugin.getBoundingClientRect();
michael@0:     // XXX bug 446693. The text-shadow on the submitted-report text at
michael@0:     //     the bottom causes scrollHeight to be larger than it should be.
michael@0:     let overflows = (overlay.scrollWidth > pluginRect.width) ||
michael@0:                     (overlay.scrollHeight - 5 > pluginRect.height);
michael@0: 
michael@0:     return overflows;
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: 
michael@0:     return tagMimetype;
michael@0:   },
michael@0: 
michael@0:   handlePluginBindingAttached: function (aTab, 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:       // Not all bindings have handlers
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     switch  (eventType) {
michael@0:       case "PluginClickToPlay": {
michael@0:         // Check if plugins have already been activated for this page, or if
michael@0:         // the user has set a permission to always play plugins on the site
michael@0:         if (aTab.clickToPlayPluginsActivated ||
michael@0:             Services.perms.testPermission(aTab.browser.currentURI, "plugins") ==
michael@0:             Services.perms.ALLOW_ACTION) {
michael@0:           PluginHelper.playPlugin(plugin);
michael@0:           return;
michael@0:         }
michael@0: 
michael@0:         // If the plugin is hidden, or if the overlay is too small, show a 
michael@0:         // doorhanger notification
michael@0:         if (PluginHelper.isTooSmall(plugin, overlay)) {
michael@0:           PluginHelper.delayAndShowDoorHanger(aTab);
michael@0:         } else {
michael@0:           // There's a large enough visible overlay that we don't need to show
michael@0:           // the doorhanger.
michael@0:           aTab.shouldShowPluginDoorhanger = false;
michael@0:           overlay.classList.add("visible");
michael@0:         }
michael@0: 
michael@0:         // Add click to play listener to the overlay
michael@0:         overlay.addEventListener("click", function(e) {
michael@0:           if (!e.isTrusted)
michael@0:             return;
michael@0:           e.preventDefault();
michael@0:           let win = e.target.ownerDocument.defaultView.top;
michael@0:           let tab = BrowserApp.getTabForWindow(win);
michael@0:           tab.clickToPlayPluginsActivated = true;
michael@0:           PluginHelper.playAllPlugins(win);
michael@0: 
michael@0:           NativeWindow.doorhanger.hide("ask-to-play-plugins", tab.id);
michael@0:         }, true);
michael@0: 
michael@0:         // Add handlers for over- and underflow in case the plugin gets resized
michael@0:         plugin.addEventListener("overflow", function(event) {
michael@0:           overlay.classList.remove("visible");
michael@0:           PluginHelper.delayAndShowDoorHanger(aTab);
michael@0:         });
michael@0:         plugin.addEventListener("underflow", function(event) {
michael@0:           // This is also triggered if only one dimension underflows,
michael@0:           // the other dimension might still overflow
michael@0:           if (!PluginHelper.isTooSmall(plugin, overlay)) {
michael@0:             overlay.classList.add("visible");
michael@0:           }
michael@0:         });
michael@0: 
michael@0:         break;
michael@0:       }
michael@0: 
michael@0:       case "PluginPlayPreview": {
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:         if (!playPreviewInfo.ignoreCTP) {
michael@0:           // Check if plugins have already been activated for this page, or if
michael@0:           // the user has set a permission to always play plugins on the site
michael@0:           if (aTab.clickToPlayPluginsActivated ||
michael@0:               Services.perms.testPermission(aTab.browser.currentURI, "plugins") ==
michael@0:               Services.perms.ALLOW_ACTION) {
michael@0:             PluginHelper.playPlugin(plugin);
michael@0:             return;
michael@0:           }
michael@0: 
michael@0:           // Always show door hanger for play preview plugins
michael@0:           PluginHelper.delayAndShowDoorHanger(aTab);
michael@0:         }
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: 
michael@0:         // MozPlayPlugin event can be dispatched from the extension chrome
michael@0:         // code to replace the preview content with the native plugin
michael@0:         previewContent.addEventListener("MozPlayPlugin", function playPluginHandler(e) {
michael@0:           if (!e.isTrusted)
michael@0:             return;
michael@0: 
michael@0:           previewContent.removeEventListener("MozPlayPlugin", playPluginHandler, true);
michael@0: 
michael@0:           let playPlugin = !aEvent.detail;
michael@0:           PluginHelper.stopPlayPreview(plugin, playPlugin);
michael@0: 
michael@0:           // cleaning up: removes overlay iframe from the DOM
michael@0:           let iframe = previewContent.getElementsByClassName("previewPluginContentFrame")[0];
michael@0:           if (iframe)
michael@0:             previewContent.removeChild(iframe);
michael@0:         }, true);
michael@0:         break;
michael@0:       }
michael@0: 
michael@0:       case "PluginNotFound": {
michael@0:         // On devices where we don't support Flash, there will be a
michael@0:         // "Learn More..." link in the missing plugin error message.
michael@0:         let learnMoreLink = doc.getAnonymousElementByAttribute(plugin, "class", "unsupportedLearnMoreLink");
michael@0:         let learnMoreUrl = Services.urlFormatter.formatURLPref("app.support.baseURL");
michael@0:         learnMoreUrl += "mobile-flash-unsupported";
michael@0:         learnMoreLink.href = learnMoreUrl;
michael@0:         overlay.classList.add("visible");
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_CLICK_TO_PLAY:
michael@0:         return "PluginClickToPlay";
michael@0:       case Ci.nsIObjectLoadingContent.PLUGIN_PLAY_PREVIEW:
michael@0:         return "PluginPlayPreview";
michael@0:       default:
michael@0:         // Not all states map to a handler
michael@0:         return null;
michael@0:     }
michael@0:   }
michael@0: };