[DevTools] Typed events and event listeners.

third_party/WebKit/Source/devtools/front_end/resources/DOMStorageModel.js

 /*
  * Copyright (C) 2008 Nokia Inc.  All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 12 matching lines @@
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /**
  * @unrestricted
  */
-Resources.DOMStorage = class extends Common.Object {
+Resources.DOMStorage = class extends Common.ObjectBase {
   /**
    * @param {!Resources.DOMStorageModel} model
    * @param {string} securityOrigin
    * @param {boolean} isLocalStorage
    */
   constructor(model, securityOrigin, isLocalStorage) {
     super();
     this._model = model;
     this._securityOrigin = securityOrigin;
     this._isLocalStorage = isLocalStorage;
@@ skipping 39 matching lines @@
   }
 
   /**
    * @param {string} key
    */
   removeItem(key) {
     this._model._agent.removeDOMStorageItem(this.id, key);
   }
 };
 
+Resources.DOMStorage.ItemsClearedEvent = class {};
 
-/** @enum {symbol} */
-Resources.DOMStorage.Events = {
-  DOMStorageItemsCleared: Symbol('DOMStorageItemsCleared'),
-  DOMStorageItemRemoved: Symbol('DOMStorageItemRemoved'),
-  DOMStorageItemAdded: Symbol('DOMStorageItemAdded'),
-  DOMStorageItemUpdated: Symbol('DOMStorageItemUpdated')
+Resources.DOMStorage.ItemRemovedEvent = class {
+  /**
+   * @param {string} key
+   */
+  constructor(key) {
+    this.key = key;
+  }
+};
+
+Resources.DOMStorage.ItemAddedEvent = class {
+  /**
+   * @param {string} key
+   * @param {string} value
+   */
+  constructor(key, value) {
+    this.key = key;
+    this.value = value;
+  }
+};
+
+Resources.DOMStorage.ItemUpdatedEvent = class {
+  /**
+   * @param {string} key
+   * @param {string} oldValue
+   * @param {string} newValue
+   */
+  constructor(key, oldValue, newValue) {
+    this.key = key;
+    this.oldValue = oldValue;
+    this.newValue = newValue;
+  }
 };
 
 /**
  * @unrestricted
  */
 Resources.DOMStorageModel = class extends SDK.SDKModel {
   /**
    * @param {!SDK.Target} target
    * @param {!SDK.SecurityOriginManager} securityOriginManager
    */
@@ skipping 102 matching lines @@
     return JSON.stringify(Resources.DOMStorage.storageId(securityOrigin, isLocalStorage));
   }
 
   /**
    * @param {!Protocol.DOMStorage.StorageId} storageId
    */
   _domStorageItemsCleared(storageId) {
     var domStorage = this.storageForId(storageId);
     if (!domStorage)
       return;
-
-    var eventData = {};
-    domStorage.dispatchEventToListeners(Resources.DOMStorage.Events.DOMStorageItemsCleared, eventData);
+    domStorage.dispatchEventToListeners(new Resources.DOMStorage.ItemsClearedEvent());
   }
 
   /**
    * @param {!Protocol.DOMStorage.StorageId} storageId
    * @param {string} key
    */
   _domStorageItemRemoved(storageId, key) {
     var domStorage = this.storageForId(storageId);
     if (!domStorage)
       return;
-
-    var eventData = {key: key};
-    domStorage.dispatchEventToListeners(Resources.DOMStorage.Events.DOMStorageItemRemoved, eventData);
+    domStorage.dispatchEventToListeners(new Resources.DOMStorage.ItemRemovedEvent(key));
   }
 
   /**
    * @param {!Protocol.DOMStorage.StorageId} storageId
    * @param {string} key
    * @param {string} value
    */
   _domStorageItemAdded(storageId, key, value) {
     var domStorage = this.storageForId(storageId);
     if (!domStorage)
       return;
-
-    var eventData = {key: key, value: value};
-    domStorage.dispatchEventToListeners(Resources.DOMStorage.Events.DOMStorageItemAdded, eventData);
+    domStorage.dispatchEventToListeners(new Resources.DOMStorage.ItemAddedEvent(key, value));
   }
 
   /**
    * @param {!Protocol.DOMStorage.StorageId} storageId
    * @param {string} key
    * @param {string} oldValue
    * @param {string} value
    */
   _domStorageItemUpdated(storageId, key, oldValue, value) {
     var domStorage = this.storageForId(storageId);
     if (!domStorage)
       return;
-
-    var eventData = {key: key, oldValue: oldValue, value: value};
-    domStorage.dispatchEventToListeners(Resources.DOMStorage.Events.DOMStorageItemUpdated, eventData);
+    domStorage.dispatchEventToListeners(new Resources.DOMStorage.ItemUpdatedEvent(key, oldValue, value));
   }
 
   /**
    * @param {!Protocol.DOMStorage.StorageId} storageId
    * @return {!Resources.DOMStorage}
    */
   storageForId(storageId) {
     return this._storages[JSON.stringify(storageId)];
   }
 
@@ skipping 59 matching lines @@
    * @param {string} key
    * @param {string} oldValue
    * @param {string} value
    */
   domStorageItemUpdated(storageId, key, oldValue, value) {
     this._model._domStorageItemUpdated(storageId, key, oldValue, value);
   }
 };
 
 Resources.DOMStorageModel._symbol = Symbol('DomStorage');