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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/. */
let backgroundPort = null;
let nativePort = null;
function connectNativePort() {
if (nativePort) {
return;
}
backgroundPort = browser.runtime.connect();
nativePort = browser.runtime.connectNative("browser");
nativePort.onMessage.addListener(message => {
if (message.type) {
// This is a session-specific webExtensionApiCall.
// Forward to the background script.
backgroundPort.postMessage(message);
} else if (message.eval) {
try {
// Using eval here is the whole point of this WebExtension so we can
// safely ignore the eslint warning.
const response = window.eval(message.eval); // eslint-disable-line no-eval
sendResponse(message.id, response);
} catch (ex) {
sendSyncResponse(message.id, null, ex);
}
}
});
function sendResponse(id, response, exception) {
Promise.resolve(response).then(
value => sendSyncResponse(id, value),
reason => sendSyncResponse(id, null, reason)
);
}
function sendSyncResponse(id, response, exception) {
nativePort.postMessage({
id,
response: JSON.stringify(response),
exception: exception && exception.toString(),
});
}
}
function disconnectNativePort() {
backgroundPort?.disconnect();
nativePort?.disconnect();
backgroundPort = null;
nativePort = null;
}
window.addEventListener("pageshow", connectNativePort);
window.addEventListener("pagehide", disconnectNativePort);
// If loading error page, pageshow mightn't fired.
connectNativePort();
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