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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/ipc/manifestMessages.js
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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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/.*/
+/*
+ * Manifest obtainer frame script implementation of:
+ * http://www.w3.org/TR/appmanifest/#obtaining
+ *
+ * It searches a top-level browsing context for
+ * a <link rel=manifest> element. Then fetches
+ * and processes the linked manifest.
+ *
+ * BUG: https://bugzilla.mozilla.org/show_bug.cgi?id=1083410
+ */
+/*globals Task, ManifestObtainer, ManifestFinder, content, sendAsyncMessage, addMessageListener, Components*/
+"use strict";
+const {
+ utils: Cu,
+} = Components;
+Cu.import("resource://gre/modules/ManifestObtainer.jsm");
+Cu.import("resource://gre/modules/ManifestFinder.jsm");
+Cu.import("resource://gre/modules/Task.jsm");
+
+const MessageHandler = {
+ registerListeners() {
+ addMessageListener(
+ "DOM:WebManifest:hasManifestLink",
+ this.hasManifestLink.bind(this)
+ );
+ addMessageListener(
+ "DOM:ManifestObtainer:Obtain",
+ this.obtainManifest.bind(this)
+ );
+ addMessageListener(
+ "DOM:Manifest:FireAppInstalledEvent",
+ this.fireAppInstalledEvent.bind(this)
+ );
+ },
+
+ /**
+ * Check if the content document includes a link to a web manifest.
+ * @param {Object} aMsg The IPC message, which is destructured to just
+ * get the id.
+ */
+ hasManifestLink({data: {id}}) {
+ const response = makeMsgResponse(id);
+ response.result = ManifestFinder.contentHasManifestLink(content);
+ response.success = true;
+ sendAsyncMessage("DOM:WebManifest:hasManifestLink", response);
+ },
+
+ /**
+ * Asynchronously obtains a web manifest from content by using the
+ * ManifestObtainer and messages back the result.
+ * @param {Object} aMsg The IPC message, which is destructured to just
+ * get the id.
+ */
+ obtainManifest: Task.async(function* ({data: {id}}) {
+ const response = makeMsgResponse(id);
+ try {
+ response.result = yield ManifestObtainer.contentObtainManifest(content);
+ response.success = true;
+ } catch (err) {
+ response.result = serializeError(err);
+ }
+ sendAsyncMessage("DOM:ManifestObtainer:Obtain", response);
+ }),
+
+ fireAppInstalledEvent({data: {id}}){
+ const ev = new Event("appinstalled");
+ const response = makeMsgResponse(id);
+ if (!content || content.top !== content) {
+ const msg = "Can only dispatch install event on top-level browsing contexts.";
+ response.result = serializeError(new Error(msg));
+ } else {
+ response.success = true;
+ content.dispatchEvent(ev);
+ }
+ sendAsyncMessage("DOM:Manifest:FireAppInstalledEvent", response);
+ }
+};
+/**
+ * Utility function to Serializes an JS Error, so it can be transferred over
+ * the message channel.
+ * FIX ME: https://bugzilla.mozilla.org/show_bug.cgi?id=1172586
+ * @param {Error} aError The error to serialize.
+ * @return {Object} The serialized object.
+ */
+function serializeError(aError) {
+ const clone = {
+ "fileName": aError.fileName,
+ "lineNumber": aError.lineNumber,
+ "columnNumber": aError.columnNumber,
+ "stack": aError.stack,
+ "message": aError.message,
+ "name": aError.name
+ };
+ return clone;
+}
+
+function makeMsgResponse(aId) {
+ return {
+ id: aId,
+ success: false,
+ result: undefined
+ };
+ }
+
+MessageHandler.registerListeners();