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// this script is called when the VueDevtools panel is activated.
import { initDevTools, setAppConnected } from '@front'
import { Bridge, BridgeEvents } from '@vue-devtools/shared-utils'
let disconnected = false
let connectCount = 0
let retryConnectTimer
initDevTools({
/**
* Inject backend, connect to background, and send back the bridge.
*
* @param {Function} cb
*/
connect(cb) {
// 1. inject backend code into page
injectScript(chrome.runtime.getURL('build/backend.js'), () => {
// 2. connect to background to setup proxy
let port
const onMessageHandlers = []
function connect() {
try {
clearTimeout(retryConnectTimer)
connectCount++
port = chrome.runtime.connect({
name: `${chrome.devtools.inspectedWindow.tabId}`,
})
disconnected = false
port.onDisconnect.addListener(() => {
disconnected = true
setAppConnected(false)
// Retry
retryConnectTimer = setTimeout(connect, 500)
})
if (connectCount > 1) {
onMessageHandlers.forEach(fn => port.onMessage.addListener(fn))
}
}
catch (e) {
console.error(e)
disconnected = true
setAppConnected(false)
// Retry
retryConnectTimer = setTimeout(connect, 1000)
}
}
connect()
const bridge = new Bridge({
listen(fn) {
port.onMessage.addListener(fn)
onMessageHandlers.push(fn)
},
send(data) {
if (!disconnected) {
// if (process.env.NODE_ENV !== 'production') {
// console.log('[chrome] devtools -> backend', data)
// }
port.postMessage(data)
}
},
})
bridge.on(BridgeEvents.TO_FRONT_RECONNECTED, () => {
setAppConnected(true)
})
// 3. send a proxy API to the panel
cb(bridge)
})
},
/**
* Register a function to reload the devtools app.
*
* @param {Function} reloadFn
*/
onReload(reloadFn) {
chrome.devtools.network.onNavigated.addListener(reloadFn)
},
})
/**
* Inject a globally evaluated script, in the same context with the actual
* user app.
*
* @param {string} scriptName
* @param {Function} cb
*/
function injectScript(scriptName, cb) {
const src = `
(function() {
var script = document.constructor.prototype.createElement.call(document, 'script');
script.src = "${scriptName}";
document.documentElement.appendChild(script);
script.parentNode.removeChild(script);
})()
`
chrome.devtools.inspectedWindow.eval(src, (res, err) => {
if (err) {
console.error(err)
}
cb()
})
}
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