Dart bindings for WebKit

Source/WebCore/bindings/dart/DartEventListener.h

+/*
+ * Copyright (C) 2011 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (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.
+ */
+
+#ifndef DartEventListener_h
+#define DartEventListener_h
+
+#include "EventListener.h"
+
+#include <dart_api.h>
+#include <wtf/PassRefPtr.h>
+
+namespace WebCore {
+
+class Event;
+
+class DartEventListener : public EventListener {
+public:
+    static PassRefPtr<DartEventListener> createOrFetch(Dart_Handle listener);
+
+    virtual ~DartEventListener();
+
+    // Implementation of EventListener interface.
+
+    virtual bool operator==(const EventListener& other) { return this == &other; }
+
+    virtual void handleEvent(ScriptExecutionContext*, Event*);
+
+    virtual bool isLazy() const { return false; }
+
+private:
+    DartEventListener(Dart_Isolate, Dart_Handle listener);
+
+    void setListenerObject(Dart_Isolate, Dart_Handle);
+    void disposeListenerObject();
+
+    void invokeEventHandler(ScriptExecutionContext*, Event*, Dart_Handle dartEvent);
+    Dart_Handle callListenerFunction(ScriptExecutionContext*, Dart_Handle dartEvent, Event*);
+
+    // FIXME: Investigate if isolate should go in ScriptExecutionContext.
+    Dart_Isolate m_isolate;
+    Dart_Handle m_listener;
+    // FIXME: implement proper GC support for EventListeners.
+    // FIXME: investigate why m_worldContext is needed in v8, extensions?
+};
+
+}
+
+#endif // DartEventListener_h