WebKit merge 41660:41709 (WebKit side)....

third_party/WebKit/WebCore/bindings/v8/V8AbstractEventListener.h

+/*
+ * Copyright (C) 2006, 2007, 2008, 2009 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 V8AbstractEventListener_h
+#define V8AbstractEventListener_h
+
+#include "EventListener.h"
+#include <v8.h>
+
+namespace WebCore {
+
+    class Event;
+    class Frame;
+
+    // There are two kinds of event listeners: HTML or non-HMTL. onload, onfocus, etc (attributes) are always HTML event handler type;
+    // Event listeners added by Window.addEventListener or EventTargetNode::addEventListener are non-HTML type.
+    //
+    // Why does this matter?
+    // WebKit does not allow duplicated HTML event handlers of the same type, but ALLOWs duplicated non-HTML event handlers.
+    class V8AbstractEventListener : public EventListener {
+    public:
+        virtual ~V8AbstractEventListener() { }
+
+        // Returns the owner frame of the listener.
+        Frame* frame() { return m_frame; }
+
+        virtual void handleEvent(Event*, bool isWindowEvent);
+        void invokeEventHandler(v8::Handle<v8::Context>, Event*, v8::Handle<v8::Value> jsEvent, bool isWindowEvent);
+
+        // Returns the listener object, either a function or an object.
+        virtual v8::Local<v8::Object> getListenerObject()
+        {
+            return v8::Local<v8::Object>::New(m_listener);
+        }
+
+        // Dispose listener object and clear the handle.
+        void disposeListenerObject();
+
+        virtual bool disconnected() const { return !m_frame; }
+
+    protected:
+        v8::Persistent<v8::Object> m_listener;
+
+        // Indicates if this is an HTML type listener.
+        bool m_isInline;
+
+    private:
+        V8AbstractEventListener(Frame*, bool isInline);
+
+        virtual v8::Local<v8::Value> callListenerFunction(v8::Handle<v8::Value> jsevent, Event*, bool isWindowEvent) = 0;
+
+        // Get the receiver object to use for event listener call.
+        v8::Local<v8::Object> getReceiverObject(Event*, bool isWindowEvent);
+
+        // Frame to which the event listener is attached to. An event listener must be destroyed before its owner frame is
+        // deleted. See fast/dom/replaceChild.html
+        // FIXME: this could hold m_frame live until the event listener is deleted.
+        Frame* m_frame;
+
+        // Position in the HTML source for HTML event listeners.
+        int m_lineNumber;
+        int m_columnNumber;
+
+        friend class V8EventListener;
+        friend class V8ObjectEventListener;
+        friend class V8LazyEventListener;
+    };
+
+} // namespace WebCore
+
+#endif // V8AbstractEventListener_h