Use ES6 style class

atom/browser/lib/objects-registry.js

@@ -1,9 +1,10 @@
-const EventEmitter = require('events').EventEmitter;
-const util = require('util');
-const v8Util = process.atomBinding('v8_util');
+'use strict';
 
-function ObjectsRegistry() {
-  ObjectsRegistry.super_.call(this);
+const EventEmitter = require('events').EventEmitter;
+
+class ObjectsRegistry extends EventEmitter {
+  constructor() {
+    super();
 
     this.setMaxListeners(Number.MAX_VALUE);
     this.nextId = 0;
@@ -15,13 +16,11 @@ function ObjectsRegistry() {
     // Stores the IDs of objects referenced by WebContents.
     // (webContentsId) => {(id) => (count)}
     this.owners = {};
-}
+  }
 
-util.inherits(ObjectsRegistry, EventEmitter);
-
-// Register a new object, the object would be kept referenced until you release
-// it explicitly.
-ObjectsRegistry.prototype.add = function(webContentsId, obj) {
+  // Register a new object, the object would be kept referenced until you release
+  // it explicitly.
+  add(webContentsId, obj) {
     var base, base1, id;
     id = this.saveToStorage(obj);
 
@@ -36,18 +35,16 @@ ObjectsRegistry.prototype.add = function(webContentsId, obj) {
 
     // Returns object's id
     return id;
-};
+  }
 
-
-// Get an object according to its ID.
-ObjectsRegistry.prototype.get = function(id) {
+  // Get an object according to its ID.
+  get(id) {
     var ref;
     return (ref = this.storage[id]) != null ? ref.object : void 0;
-};
+  }
 
-
-// Dereference an object according to its ID.
-ObjectsRegistry.prototype.remove = function(webContentsId, id) {
+  // Dereference an object according to its ID.
+  remove(webContentsId, id) {
     var pointer;
     this.dereference(id, 1);
 
@@ -60,10 +57,10 @@ ObjectsRegistry.prototype.remove = function(webContentsId, id) {
     if (pointer[id] === 0) {
       return delete pointer[id];
     }
-};
+  }
 
-// Clear all references to objects refrenced by the WebContents.
-ObjectsRegistry.prototype.clear = function(webContentsId) {
+  // Clear all references to objects refrenced by the WebContents.
+  clear(webContentsId) {
     var count, id, ref;
     this.emit("clear-" + webContentsId);
     if (this.owners[webContentsId] == null) {
@@ -75,10 +72,10 @@ ObjectsRegistry.prototype.clear = function(webContentsId) {
       this.dereference(id, count);
     }
     return delete this.owners[webContentsId];
-};
+  }
 
-// Private: Saves the object into storage and assigns an ID for it.
-ObjectsRegistry.prototype.saveToStorage = function(object) {
+  // Private: Saves the object into storage and assigns an ID for it.
+  saveToStorage(object) {
     var id;
     id = v8Util.getHiddenValue(object, 'atomId');
     if (!id) {
@@ -91,10 +88,10 @@ ObjectsRegistry.prototype.saveToStorage = function(object) {
     }
     ++this.storage[id].count;
     return id;
-};
+  }
 
-// Private: Dereference the object from store.
-ObjectsRegistry.prototype.dereference = function(id, count) {
+  // Private: Dereference the object from store.
+  dereference(id, count) {
     var pointer;
     pointer = this.storage[id];
     if (pointer == null) {
@@ -105,6 +102,7 @@ ObjectsRegistry.prototype.dereference = function(id, count) {
       v8Util.deleteHiddenValue(pointer.object, 'atomId');
       return delete this.storage[id];
     }
-};
+  }
+}
 
 module.exports = new ObjectsRegistry;