electron/lib/common/api/callbacks-registry.js

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