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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";
ChromeUtils.defineESModuleGetters(this, {
WebNavigationFrames: "resource://gre/modules/WebNavigationFrames.sys.mjs",
});
/* eslint-disable jsdoc/check-param-names */
/**
* With optional arguments on both ends, this case is ambiguous:
* runtime.sendMessage("string", {} or nullish)
*
* Sending a message within the extension is more common than sending
* an empty object to another extension, so we prefer that conclusion.
*
* @param {string?} [extensionId]
* @param {any} message
* @param {object?} [options]
* @param {Function} [callback]
* @returns {{extensionId: string?, message: any, callback: Function?}}
*/
/* eslint-enable jsdoc/check-param-names */
function parseBonkersArgs(...args) {
let Error = ExtensionUtils.ExtensionError;
let callback = typeof args[args.length - 1] === "function" && args.pop();
// We don't support any options anymore, so only an empty object is valid.
function validOptions(v) {
return v == null || (typeof v === "object" && !Object.keys(v).length);
}
if (args.length === 1 || (args.length === 2 && validOptions(args[1]))) {
// Interpret as passing null for extensionId (message within extension).
args.unshift(null);
}
let [extensionId, message, options] = args;
if (!args.length) {
throw new Error("runtime.sendMessage's message argument is missing");
} else if (!validOptions(options)) {
throw new Error("runtime.sendMessage's options argument is invalid");
} else if (args.length === 4 && args[3] && !callback) {
throw new Error("runtime.sendMessage's last argument is not a function");
} else if (args[3] != null || args.length > 4) {
throw new Error("runtime.sendMessage received too many arguments");
} else if (extensionId && typeof extensionId !== "string") {
throw new Error("runtime.sendMessage's extensionId argument is invalid");
}
return { extensionId, message, callback };
}
this.runtime = class extends ExtensionAPI {
getAPI(context) {
let { extension } = context;
return {
runtime: {
onConnect: context.messenger.onConnect.api(),
onMessage: context.messenger.onMessage.api(),
onConnectExternal: context.messenger.onConnectEx.api(),
onMessageExternal: context.messenger.onMessageEx.api(),
connect(extensionId, options) {
let name = options?.name ?? "";
return context.messenger.connect({ name, extensionId });
},
sendMessage(...args) {
let arg = parseBonkersArgs(...args);
return context.messenger.sendRuntimeMessage(arg);
},
connectNative(name) {
return context.messenger.connect({ name, native: true });
},
sendNativeMessage(nativeApp, message) {
return context.messenger.sendNativeMessage(nativeApp, message);
},
get lastError() {
return context.lastError;
},
getManifest() {
return Cu.cloneInto(extension.manifest, context.cloneScope);
},
id: extension.id,
getURL(url) {
return extension.baseURI.resolve(url);
},
getFrameId(target) {
let frameId = WebNavigationFrames.getFromWindow(target);
if (frameId >= 0) {
return frameId;
}
// Not a WindowProxy, perhaps an embedder element?
let type;
try {
type = Cu.getClassName(target, true);
} catch (e) {
// Not a valid object, will throw below.
}
const embedderTypes = [
"HTMLIFrameElement",
"HTMLFrameElement",
"HTMLEmbedElement",
"HTMLObjectElement",
];
if (embedderTypes.includes(type)) {
if (!target.browsingContext) {
return -1;
}
return WebNavigationFrames.getFrameId(target.browsingContext);
}
throw new ExtensionUtils.ExtensionError("Invalid argument");
},
},
};
}
getAPIObjectForRequest(context, request) {
if (request.apiObjectType === "Port") {
const port = context.messenger.getPortById(request.apiObjectId);
if (!port) {
throw new Error(`Port API object not found: ${request}`);
}
return port.api;
}
throw new Error(`Unexpected apiObjectType: ${request}`);
}
};
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