bluetooth: Subscribe to notifications

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 "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 ScriptWrappable
+    , public ActiveDOMObject
+    , public WebBluetoothGATTCharacteristic {
+    USING_PRE_FINALIZER(BluetoothGATTCharacteristic, dispose);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(BluetoothGATTCharacteristic);
     DEFINE_WRAPPERTYPEINFO();
 public:
-    explicit BluetoothGATTCharacteristic(PassOwnPtr<WebBluetoothGATTCharacteristicInit>);
+    explicit BluetoothGATTCharacteristic(ExecutionContext*, PassOwnPtr<WebBluetoothGATTCharacteristicInit>);
 
     // Interface required by CallbackPromiseAdapter.
     using WebType = OwnPtr<WebBluetoothGATTCharacteristicInit>;
     static BluetoothGATTCharacteristic* take(ScriptPromiseResolver*, PassOwnPtr<WebBluetoothGATTCharacteristicInit>);
 
+    // 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();
+
     // Interface required by garbage collection.
-    DEFINE_INLINE_TRACE() { }
+    DECLARE_VIRTUAL_TRACE();
 
     // IDL exposed interface:
     String uuid() { return m_webCharacteristic->uuid; }
     ScriptPromise readValue(ScriptState*);
     ScriptPromise writeValue(ScriptState*, const DOMArrayPiece&);
+    ScriptPromise startNotifications(ScriptState*);
+    ScriptPromise stopNotifications(ScriptState*);
 
 private:
     OwnPtr<WebBluetoothGATTCharacteristicInit> m_webCharacteristic;
+    bool m_stopped;
 };
 
 } // namespace blink
 
 #endif // BluetoothGATTCharacteristic_h