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/* vim: set ts=2 sw=2 sts=2 et tw=80: */
/* 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/. */
// We use importESModule here instead of static import so that
// the Karma test environment won't choke on this module. This
// is because the Karma test environment already stubs out
// MESSAGE_TYPE_LIST and MESSAGE_TYPE_HASH, and overrides importESModule
// to be a no-op (which can't be done for a static import statement).
// eslint-disable-next-line mozilla/use-static-import
const { MESSAGE_TYPE_LIST, MESSAGE_TYPE_HASH: msg } =
ChromeUtils.importESModule("resource:///modules/asrouter/ActorConstants.mjs");
const VALID_TYPES = new Set(MESSAGE_TYPE_LIST);
export class ASRouterChild extends JSWindowActorChild {
constructor() {
super();
this.observers = new Set();
}
didDestroy() {
this.observers.clear();
}
actorCreated() {
// NOTE: DOMDocElementInserted may be called multiple times per
// PWindowGlobal due to the initial about:blank document's window global
// being re-used.
const window = this.contentWindow;
Cu.exportFunction(this.asRouterMessage.bind(this), window, {
defineAs: "ASRouterMessage",
});
Cu.exportFunction(this.addParentListener.bind(this), window, {
defineAs: "ASRouterAddParentListener",
});
Cu.exportFunction(this.removeParentListener.bind(this), window, {
defineAs: "ASRouterRemoveParentListener",
});
}
handleEvent() {
// DOMDocElementCreated is only used to create the actor.
}
addParentListener(listener) {
this.observers.add(listener);
}
removeParentListener(listener) {
this.observers.delete(listener);
}
receiveMessage({ name, data }) {
switch (name) {
case "UpdateAdminState":
case "ClearProviders": {
this.observers.forEach(listener => {
let result = Cu.cloneInto(
{
type: name,
data,
},
this.contentWindow
);
listener(result);
});
break;
}
}
}
wrapPromise(promise) {
return new this.contentWindow.Promise((resolve, reject) =>
promise.then(resolve, reject)
);
}
sendQuery(aName, aData = null) {
return this.wrapPromise(
new Promise(resolve => {
super.sendQuery(aName, aData).then(result => {
resolve(Cu.cloneInto(result, this.contentWindow));
});
})
);
}
asRouterMessage({ type, data }) {
// Some legacy privileged addons send this message, but it got removed from
// VALID_TYPES in bug 1715158. Thankfully, these addons don't appear to
// require any actions from this message - just a Promise that resolves.
if (type === "NEWTAB_MESSAGE_REQUEST") {
return this.wrapPromise(Promise.resolve());
}
if (VALID_TYPES.has(type)) {
switch (type) {
case msg.DISABLE_PROVIDER:
case msg.ENABLE_PROVIDER:
case msg.EXPIRE_QUERY_CACHE:
case msg.FORCE_PRIVATE_BROWSING_WINDOW:
case msg.IMPRESSION:
case msg.RESET_PROVIDER_PREF:
case msg.SET_PROVIDER_USER_PREF:
case msg.USER_ACTION: {
return this.sendAsyncMessage(type, data);
}
default: {
// these messages need a response
return this.sendQuery(type, data);
}
}
}
throw new Error(`Unexpected type "${type}"`);
}
}
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