1/* 2 * Copyright (C) 2008, 2009 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 ScriptValue_h 32#define ScriptValue_h 33 34#include "PlatformString.h" 35#include "ScriptState.h" 36 37#include <v8.h> 38#include <wtf/PassRefPtr.h> 39 40#ifndef NDEBUG 41#include "V8Proxy.h" // for register and unregister global handles. 42#endif 43 44namespace WebCore { 45 46class SerializedScriptValue; 47 48class ScriptValue { 49public: 50 ScriptValue() {} 51 52 ScriptValue(v8::Handle<v8::Value> value) 53 { 54 if (value.IsEmpty()) 55 return; 56 57 m_value = v8::Persistent<v8::Value>::New(value); 58#ifndef NDEBUG 59 V8GCController::registerGlobalHandle(SCRIPTVALUE, this, m_value); 60#endif 61 } 62 63 ScriptValue(const ScriptValue& value) 64 { 65 if (value.m_value.IsEmpty()) 66 return; 67 68 m_value = v8::Persistent<v8::Value>::New(value.m_value); 69#ifndef NDEBUG 70 V8GCController::registerGlobalHandle(SCRIPTVALUE, this, m_value); 71#endif 72 } 73 74 ScriptValue& operator=(const ScriptValue& value) 75 { 76 if (this == &value) 77 return *this; 78 79 clear(); 80 81 if (value.m_value.IsEmpty()) 82 return *this; 83 84 m_value = v8::Persistent<v8::Value>::New(value.m_value); 85#ifndef NDEBUG 86 V8GCController::registerGlobalHandle(SCRIPTVALUE, this, m_value); 87#endif 88 89 return *this; 90 } 91 92 bool operator==(const ScriptValue value) const 93 { 94 return m_value == value.m_value; 95 } 96 97 bool isEqual(ScriptState*, const ScriptValue& value) const 98 { 99 return m_value == value.m_value; 100 } 101 102 bool operator!=(const ScriptValue value) const 103 { 104 return !operator==(value); 105 } 106 107 bool isNull() const 108 { 109 return m_value->IsNull(); 110 } 111 112 bool isUndefined() const 113 { 114 return m_value->IsUndefined(); 115 } 116 117 bool isObject() const 118 { 119 return m_value->IsObject(); 120 } 121 122 bool hasNoValue() const 123 { 124 return m_value.IsEmpty(); 125 } 126 127 PassRefPtr<SerializedScriptValue> serialize(ScriptState*); 128 static ScriptValue deserialize(ScriptState*, SerializedScriptValue*); 129 130 void clear() 131 { 132 if (m_value.IsEmpty()) 133 return; 134 135#ifndef NDEBUG 136 V8GCController::unregisterGlobalHandle(this, m_value); 137#endif 138 m_value.Dispose(); 139 m_value.Clear(); 140 } 141 142 virtual ~ScriptValue() 143 { 144 clear(); 145 } 146 147 v8::Handle<v8::Value> v8Value() const { return m_value; } 148 bool getString(ScriptState*, String& result) const { return getString(result); } 149 bool getString(String& result) const; 150 String toString(ScriptState*) const; 151 152private: 153 mutable v8::Persistent<v8::Value> m_value; 154}; 155 156} // namespace WebCore 157 158#endif // ScriptValue_h 159