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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
var EXPORTED_SYMBOLS = ["PluginChild"];
// Handle GMP crashes
class PluginChild extends JSWindowActorChild {
handleEvent(event) {
// Ignore events for other frames.
let eventDoc = event.target.ownerDocument || event.target.document;
if (eventDoc && eventDoc != this.document) {
return;
}
let eventType = event.type;
if (eventType == "PluginCrashed") {
this.onPluginCrashed(event);
}
}
/**
* Determines whether or not the crashed plugin is contained within current
* full screen DOM element.
* @param fullScreenElement (DOM element)
* The DOM element that is currently full screen, or null.
* @param domElement
* The DOM element which contains the crashed plugin, or the crashed plugin
* itself.
* @returns bool
* True if the plugin is a descendant of the full screen DOM element, false otherwise.
**/
isWithinFullScreenElement(fullScreenElement, domElement) {
/**
* Traverses down iframes until it find a non-iframe full screen DOM element.
* @param fullScreenIframe
* Target iframe to begin searching from.
* @returns DOM element
* The full screen DOM element contained within the iframe (could be inner iframe), or the original iframe if no inner DOM element is found.
**/
let getTrueFullScreenElement = fullScreenIframe => {
if (
typeof fullScreenIframe.contentDocument !== "undefined" &&
fullScreenIframe.contentDocument.mozFullScreenElement
) {
return getTrueFullScreenElement(
fullScreenIframe.contentDocument.mozFullScreenElement
);
}
return fullScreenIframe;
};
if (fullScreenElement.tagName === "IFRAME") {
fullScreenElement = getTrueFullScreenElement(fullScreenElement);
}
if (fullScreenElement.contains(domElement)) {
return true;
}
let parentIframe = domElement.ownerGlobal.frameElement;
if (parentIframe) {
return this.isWithinFullScreenElement(fullScreenElement, parentIframe);
}
return false;
}
/**
* The PluginCrashed event handler. The target of the event is the
* document that GMP is being used in.
*/
async onPluginCrashed(aEvent) {
if (!this.contentWindow.PluginCrashedEvent.isInstance(aEvent)) {
return;
}
let { target, gmpPlugin, pluginID } = aEvent;
let fullScreenElement = this.contentWindow.top.document
.mozFullScreenElement;
if (fullScreenElement) {
if (this.isWithinFullScreenElement(fullScreenElement, target)) {
this.contentWindow.top.document.mozCancelFullScreen();
}
}
if (!gmpPlugin || !target.document) {
// TODO: Throw exception? How did we get here?
return;
}
this.sendAsyncMessage("PluginContent:ShowPluginCrashedNotification", {
pluginCrashID: { pluginID },
});
}
}
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