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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/. */
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
TranslationsParent: "resource://gre/actors/TranslationsParent.sys.mjs",
});
/**
* The translations engine is in its own content process. This actor handles the
* marshalling of the data such as the engine payload and port passing.
*/
export class TranslationsEngineParent extends JSWindowActorParent {
/**
* Keep track of the live actors by InnerWindowID.
*
* @type {Map<InnerWindowID, TranslationsParent | AboutTranslationsParent>}
*/
#translationsParents = new Map();
async receiveMessage({ name, data }) {
switch (name) {
case "TranslationsEngine:Ready":
if (!lazy.TranslationsParent.resolveEngine) {
throw new Error(
"Unable to find the resolve function for when the translations engine is ready."
);
}
lazy.TranslationsParent.resolveEngine(this);
return undefined;
case "TranslationsEngine:RequestEnginePayload": {
const { fromLanguage, toLanguage } = data;
const payloadPromise =
lazy.TranslationsParent.getTranslationsEnginePayload(
fromLanguage,
toLanguage
);
payloadPromise.catch(error => {
lazy.TranslationsParent.telemetry().onError(String(error));
});
return payloadPromise;
}
case "TranslationsEngine:ReportEngineStatus": {
const { innerWindowId, status } = data;
const translationsParent = this.#translationsParents.get(innerWindowId);
// about:translations will not have a TranslationsParent associated with
// this call.
if (translationsParent) {
switch (status) {
case "ready":
translationsParent.languageState.isEngineReady = true;
break;
case "error":
translationsParent.languageState.error = "engine-load-failure";
break;
default:
throw new Error("Unknown engine status: " + status);
}
}
return undefined;
}
case "TranslationsEngine:DestroyEngineProcess":
ChromeUtils.addProfilerMarker(
"TranslationsEngine",
{},
"Loading bergamot wasm array buffer"
);
lazy.TranslationsParent.destroyEngineProcess().catch(error =>
console.error(error)
);
return undefined;
default:
return undefined;
}
}
/**
* @param {string} fromLanguage
* @param {string} toLanguage
* @param {number} innerWindowId
* @param {MessagePort} port
* @param {number} innerWindowId
* @param {TranslationsParent} [translationsParent]
*/
startTranslation(
fromLanguage,
toLanguage,
port,
innerWindowId,
translationsParent
) {
if (translationsParent) {
this.#translationsParents.set(
translationsParent.innerWindowId,
translationsParent
);
}
if (this.#isDestroyed) {
throw new Error("The translation engine process was already destroyed.");
}
const transferables = [port];
this.sendAsyncMessage(
"TranslationsEngine:StartTranslation",
{
fromLanguage,
toLanguage,
innerWindowId,
port,
},
transferables
);
}
/**
* Remove all the translations that are currently queued, and remove
* the communication port.
*
* @param {number} innerWindowId
*/
discardTranslations(innerWindowId) {
this.#translationsParents.delete(innerWindowId);
this.sendAsyncMessage("TranslationsEngine:DiscardTranslations", {
innerWindowId,
});
}
/**
* Manually shut down the engines, typically for testing purposes.
*/
forceShutdown() {
return this.sendQuery("TranslationsEngine:ForceShutdown");
}
#isDestroyed = false;
didDestroy() {
this.#isDestroyed = true;
}
}
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