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      1 /*
      2  * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef SerializedScriptValue_h
     32 #define SerializedScriptValue_h
     33 
     34 #include "ScriptValue.h"
     35 #include "V8Binding.h"
     36 #include <v8.h>
     37 #include <wtf/RefCounted.h>
     38 
     39 namespace WebCore {
     40 
     41 class SerializedScriptValue : public RefCounted<SerializedScriptValue> {
     42 public:
     43     // Creates a serialized representation of the given V8 value.
     44     static PassRefPtr<SerializedScriptValue> create(v8::Handle<v8::Value> value)
     45     {
     46         return adoptRef(new SerializedScriptValue(value));
     47     }
     48 
     49     // Creates a serialized value with the given data obtained from a
     50     // prior call to toWireString().
     51     static PassRefPtr<SerializedScriptValue> createFromWire(String data)
     52     {
     53         return adoptRef(new SerializedScriptValue(data, WireData));
     54     }
     55 
     56     // Creates a serialized representation of WebCore string.
     57     static PassRefPtr<SerializedScriptValue> create(String data)
     58     {
     59         return adoptRef(new SerializedScriptValue(data, StringValue));
     60     }
     61 
     62     // Creates an empty serialized value.
     63     static PassRefPtr<SerializedScriptValue> create()
     64     {
     65         return adoptRef(new SerializedScriptValue());
     66     }
     67 
     68     PassRefPtr<SerializedScriptValue> release()
     69     {
     70         RefPtr<SerializedScriptValue> result = adoptRef(new SerializedScriptValue(m_data, WireData));
     71         m_data = String();
     72         return result.release();
     73     }
     74 
     75     String toWireString() const { return m_data; }
     76 
     77     // Deserializes the value (in the current context). Returns an
     78     // empty handle in case of failure.
     79     v8::Local<v8::Value> deserialize();
     80 
     81 private:
     82     enum StringDataMode {
     83         StringValue,
     84         WireData
     85     };
     86 
     87     SerializedScriptValue() { }
     88 
     89     explicit SerializedScriptValue(v8::Handle<v8::Value>);
     90 
     91     SerializedScriptValue(String data, StringDataMode mode);
     92 
     93     String m_data;
     94 };
     95 
     96 } // namespace WebCore
     97 
     98 #endif // SerializedScriptValue_h
     99