1b4eb0b679
* fix: use powerMonitor.on() only after app is ready
powerMonitor can't be used until the app is ready; however, on Linux,
powerMonitor.on() was called as soon as lib/browser/api/power-monitor.ts
was loaded.
This patch takes @vladimiry's suggestion of wrapping that in an
app.on('ready') handler to prevent powerMonitor.on() from being called
prematurely.
Fixes #21716
38 lines
1.4 KiB
TypeScript
38 lines
1.4 KiB
TypeScript
'use strict'
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import { createLazyInstance } from '../utils'
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const { EventEmitter } = require('events')
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const { createPowerMonitor, PowerMonitor } = process.electronBinding('power_monitor')
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// PowerMonitor is an EventEmitter.
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Object.setPrototypeOf(PowerMonitor.prototype, EventEmitter.prototype)
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const powerMonitor = createLazyInstance(createPowerMonitor, PowerMonitor, true)
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if (process.platform === 'linux') {
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// In order to delay system shutdown when e.preventDefault() is invoked
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// on a powerMonitor 'shutdown' event, we need an org.freedesktop.login1
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// shutdown delay lock. For more details see the "Taking Delay Locks"
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// section of https://www.freedesktop.org/wiki/Software/systemd/inhibit/
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//
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// So here we watch for 'shutdown' listeners to be added or removed and
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// set or unset our shutdown delay lock accordingly.
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const { app } = require('electron')
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app.whenReady().then(() => {
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powerMonitor.on('newListener', (event: string) => {
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// whenever the listener count is incremented to one...
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if (event === 'shutdown' && powerMonitor.listenerCount('shutdown') === 0) {
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powerMonitor.blockShutdown()
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}
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})
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powerMonitor.on('removeListener', (event: string) => {
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// whenever the listener count is decremented to zero...
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if (event === 'shutdown' && powerMonitor.listenerCount('shutdown') === 0) {
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powerMonitor.unblockShutdown()
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}
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})
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})
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}
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module.exports = powerMonitor
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