WebKit side of merge from r41149 to r41181.

WebCore/bindings/v8/ScriptValue.h

+/*
+ * Copyright (C) 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 ScriptValue_h
+#define ScriptValue_h
+
+#include <v8.h>
+
+#ifndef NDEBUG
+#include "V8Proxy.h"  // for register and unregister global handles.
+#endif
+
+namespace WebCore {
+
+class String;
+
+class ScriptValue {
+public:
+    ScriptValue() {}
+
+    ScriptValue(v8::Handle<v8::Value> value) 
+    {
+        if (value.IsEmpty())
+            return;
+
+        m_value = v8::Persistent<v8::Value>::New(value);
+#ifndef NDEBUG
+        V8Proxy::RegisterGlobalHandle(SCRIPTVALUE, this, m_value);
+#endif
+    }
+
+    ScriptValue(const ScriptValue& value) 
+    {
+        if (value.m_value.IsEmpty())
+            return;
+
+        m_value = v8::Persistent<v8::Value>::New(value.m_value);
+#ifndef NDEBUG
+        V8Proxy::RegisterGlobalHandle(SCRIPTVALUE, this, m_value);
+#endif
+    }
+
+    ScriptValue& operator=(const ScriptValue& value) 
+    {
+        if (this == &value) 
+            return *this;
+
+        clear();
+
+        if (value.m_value.IsEmpty())
+            return *this;
+
+        m_value = v8::Persistent<v8::Value>::New(value.m_value);
+#ifndef NDEBUG
+        V8Proxy::RegisterGlobalHandle(SCRIPTVALUE, this, m_value);
+#endif
+
+        return *this;
+    }
+
+    bool operator==(const ScriptValue value) const
+    {
+        return m_value == value.m_value;
+    }
+
+    bool operator!=(const ScriptValue value) const
+    {
+        return !operator==(value);
+    }
+
+    bool isNull() const
+    {
+        return m_value->IsNull();
+    }
+
+    bool isUndefined() const
+    {
+        return m_value->IsUndefined();
+    }
+
+    void clear()
+    {
+        if (!m_value.IsEmpty())
+            return;
+
+#ifndef NDEBUG
+        V8Proxy::UnregisterGlobalHandle(this, m_value);
+#endif
+        m_value.Dispose();
+        m_value.Clear();
+    }
+
+    ~ScriptValue() 
+    {
+        clear();
+    }
+
+    v8::Handle<v8::Value> v8Value() const { return m_value; }
+    bool getString(String& result) const;
+
+private:
+    mutable v8::Persistent<v8::Value> m_value;
+};
+
+} // namespace WebCore
+
+#endif // ScriptValue_h