зеркало из https://github.com/mozilla/gecko-dev.git
128 строки
4.2 KiB
JavaScript
128 строки
4.2 KiB
JavaScript
/* 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
|
|
*/
|
|
"use strict";
|
|
|
|
var EXPORTED_SYMBOLS = ["ManifestMessagesChild"];
|
|
|
|
ChromeUtils.import("resource://gre/modules/ActorChild.jsm");
|
|
ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
|
|
|
|
ChromeUtils.defineModuleGetter(this, "ManifestObtainer",
|
|
"resource://gre/modules/ManifestObtainer.jsm");
|
|
ChromeUtils.defineModuleGetter(this, "ManifestFinder",
|
|
"resource://gre/modules/ManifestFinder.jsm");
|
|
ChromeUtils.defineModuleGetter(this, "ManifestIcons",
|
|
"resource://gre/modules/ManifestIcons.jsm");
|
|
|
|
class ManifestMessagesChild extends ActorChild {
|
|
receiveMessage(message) {
|
|
switch (message.name) {
|
|
case "DOM:WebManifest:hasManifestLink":
|
|
return this.hasManifestLink(message);
|
|
case "DOM:ManifestObtainer:Obtain":
|
|
return this.obtainManifest(message);
|
|
case "DOM:Manifest:FireAppInstalledEvent":
|
|
return this.fireAppInstalledEvent(message);
|
|
case "DOM:WebManifest:fetchIcon":
|
|
return this.fetchIcon(message);
|
|
}
|
|
return undefined;
|
|
}
|
|
|
|
/**
|
|
* Check if the this.mm.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(this.mm.content);
|
|
response.success = true;
|
|
this.mm.sendAsyncMessage("DOM:WebManifest:hasManifestLink", response);
|
|
}
|
|
|
|
/**
|
|
* Asynchronously obtains a web manifest from this.mm.content by using the
|
|
* ManifestObtainer and messages back the result.
|
|
* @param {Object} aMsg The IPC message, which is destructured to just
|
|
* get the id.
|
|
*/
|
|
async obtainManifest({data: {id}}) {
|
|
const response = makeMsgResponse(id);
|
|
try {
|
|
response.result = await ManifestObtainer.contentObtainManifest(this.mm.content);
|
|
response.success = true;
|
|
} catch (err) {
|
|
response.result = serializeError(err);
|
|
}
|
|
this.mm.sendAsyncMessage("DOM:ManifestObtainer:Obtain", response);
|
|
}
|
|
|
|
fireAppInstalledEvent({data: {id}}) {
|
|
const ev = new Event("appinstalled");
|
|
const response = makeMsgResponse(id);
|
|
if (!this.mm.content || this.mm.content.top !== this.mm.content) {
|
|
const msg = "Can only dispatch install event on top-level browsing contexts.";
|
|
response.result = serializeError(new Error(msg));
|
|
} else {
|
|
response.success = true;
|
|
this.mm.content.dispatchEvent(ev);
|
|
}
|
|
this.mm.sendAsyncMessage("DOM:Manifest:FireAppInstalledEvent", response);
|
|
}
|
|
|
|
/**
|
|
* Given a manifest and an expected icon size, ask ManifestIcons
|
|
* to fetch the appropriate icon and send along result
|
|
*/
|
|
async fetchIcon({data: {id, manifest, iconSize}}) {
|
|
const response = makeMsgResponse(id);
|
|
try {
|
|
response.result =
|
|
await ManifestIcons.contentFetchIcon(this.mm.content, manifest, iconSize);
|
|
response.success = true;
|
|
} catch (err) {
|
|
response.result = serializeError(err);
|
|
}
|
|
this.mm.sendAsyncMessage("DOM:WebManifest:fetchIcon", 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
|
|
};
|
|
}
|