bluetooth: Add characteristicvaluechanged event

third_party/WebKit/Source/modules/bluetooth/BluetoothGATTCharacteristic.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BluetoothGATTCharacteristic_h
 #define BluetoothGATTCharacteristic_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/DOMArrayPiece.h"
+#include "modules/EventTargetModules.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/modules/bluetooth/WebBluetoothGATTCharacteristic.h"
 #include "public/platform/modules/bluetooth/WebBluetoothGATTCharacteristicInit.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ExecutionContext;
 class ScriptPromise;
 class ScriptPromiseResolver;
 class ScriptState;
 
 // BluetoothGATTCharacteristic represents a GATT Characteristic, which is a
 // basic data element that provides further information about a peripheral's
 // service.
 //
 // Callbacks providing WebBluetoothGATTCharacteristicInit objects are handled by
 // CallbackPromiseAdapter templatized with this class. See this class's
 // "Interface required by CallbackPromiseAdapter" section and the
 // CallbackPromiseAdapter class comments.
 class BluetoothGATTCharacteristic final
-    : public GarbageCollectedFinalized<BluetoothGATTCharacteristic>
-    , public ScriptWrappable
+    : public RefCountedGarbageCollectedEventTargetWithInlineData<BluetoothGATTCharacteristic>
     , public ActiveDOMObject
     , public WebBluetoothGATTCharacteristic {
     USING_PRE_FINALIZER(BluetoothGATTCharacteristic, dispose);
+    DEFINE_WRAPPERTYPEINFO();
+    REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(BluetoothGATTCharacteristic);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(BluetoothGATTCharacteristic);
-    DEFINE_WRAPPERTYPEINFO();
 public:
     explicit BluetoothGATTCharacteristic(ExecutionContext*, PassOwnPtr<WebBluetoothGATTCharacteristicInit>);
 
     // Interface required by CallbackPromiseAdapter.
     using WebType = OwnPtr<WebBluetoothGATTCharacteristicInit>;
     static BluetoothGATTCharacteristic* take(ScriptPromiseResolver*, PassOwnPtr<WebBluetoothGATTCharacteristicInit>);
 
+    // WebBluetoothGATTCharacteristic interface:
+    void dispatchCharacteristicValueChanged(const WebVector<uint8_t>& value) override;
+
     // ActiveDOMObject interface.
     void stop() override;
 
     // USING_PRE_FINALIZER interface.
     // Called before the object gets garbage collected.
     void dispose();
 
     // Notify our embedder that we should stop any notifications.
     // The function only notifies the embedder once.
     void notifyCharacteristicObjectRemoved();
 
+    // EventTarget methods:
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const;
+    bool addEventListener(const AtomicString& eventType, PassRefPtrWillBeRawPtr<EventListener>, bool useCapture) override;
+
     // Interface required by garbage collection.
     DECLARE_VIRTUAL_TRACE();
 
     // IDL exposed interface:
     String uuid() { return m_webCharacteristic->uuid; }
+    PassRefPtr<DOMArrayBuffer> value() const { return m_value; }
     ScriptPromise readValue(ScriptState*);
     ScriptPromise writeValue(ScriptState*, const DOMArrayPiece&);
     ScriptPromise startNotifications(ScriptState*);
     ScriptPromise stopNotifications(ScriptState*);
 
+    DEFINE_ATTRIBUTE_EVENT_LISTENER(characteristicvaluechanged);
+
 private:
     OwnPtr<WebBluetoothGATTCharacteristicInit> m_webCharacteristic;
     bool m_stopped;
+    RefPtr<DOMArrayBuffer> m_value;
 };
 
 } // namespace blink
 
 #endif // BluetoothGATTCharacteristic_h