asarfuckery/electronasar/stable/renderer/callbacks-registry.js
2019-01-17 19:22:05 +01:00

59 lines
1.4 KiB
JavaScript

'use strict'
const v8Util = process.atomBinding('v8_util')
class CallbacksRegistry {
constructor () {
this.nextId = 0
this.callbacks = {}
}
add (callback) {
// The callback is already added.
let id = v8Util.getHiddenValue(callback, 'callbackId')
if (id != null) return id
id = this.nextId += 1
// Capture the location of the function and put it in the ID string,
// so that release errors can be tracked down easily.
const regexp = /at (.*)/gi
const stackString = (new Error()).stack
let filenameAndLine
let match
while ((match = regexp.exec(stackString)) !== null) {
const location = match[1]
if (location.includes('(native)')) continue
if (location.includes('(<anonymous>)')) continue
if (location.includes('electron.asar')) continue
const ref = /([^/^)]*)\)?$/gi.exec(location)
filenameAndLine = ref[1]
break
}
this.callbacks[id] = callback
v8Util.setHiddenValue(callback, 'callbackId', id)
v8Util.setHiddenValue(callback, 'location', filenameAndLine)
return id
}
get (id) {
return this.callbacks[id] || function () {}
}
apply (id, ...args) {
return this.get(id).apply(global, ...args)
}
remove (id) {
const callback = this.callbacks[id]
if (callback) {
v8Util.deleteHiddenValue(callback, 'callbackId')
delete this.callbacks[id]
}
}
}
module.exports = CallbacksRegistry