1/* 2 * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved. 3 * Copyright (C) 2007 Eric Seidel <eric@webkit.org> 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#ifndef JSCallbackObject_h 28#define JSCallbackObject_h 29 30#include "JSObjectRef.h" 31#include "JSValueRef.h" 32#include "JSObject.h" 33#include <wtf/PassOwnPtr.h> 34 35namespace JSC { 36 37struct JSCallbackObjectData : WeakHandleOwner { 38 JSCallbackObjectData(void* privateData, JSClassRef jsClass) 39 : privateData(privateData) 40 , jsClass(jsClass) 41 { 42 JSClassRetain(jsClass); 43 } 44 45 virtual ~JSCallbackObjectData() 46 { 47 JSClassRelease(jsClass); 48 } 49 50 JSValue getPrivateProperty(const Identifier& propertyName) const 51 { 52 if (!m_privateProperties) 53 return JSValue(); 54 return m_privateProperties->getPrivateProperty(propertyName); 55 } 56 57 void setPrivateProperty(VM& vm, JSCell* owner, const Identifier& propertyName, JSValue value) 58 { 59 if (!m_privateProperties) 60 m_privateProperties = adoptPtr(new JSPrivatePropertyMap); 61 m_privateProperties->setPrivateProperty(vm, owner, propertyName, value); 62 } 63 64 void deletePrivateProperty(const Identifier& propertyName) 65 { 66 if (!m_privateProperties) 67 return; 68 m_privateProperties->deletePrivateProperty(propertyName); 69 } 70 71 void visitChildren(SlotVisitor& visitor) 72 { 73 if (!m_privateProperties) 74 return; 75 m_privateProperties->visitChildren(visitor); 76 } 77 78 void* privateData; 79 JSClassRef jsClass; 80 struct JSPrivatePropertyMap { 81 JSValue getPrivateProperty(const Identifier& propertyName) const 82 { 83 PrivatePropertyMap::const_iterator location = m_propertyMap.find(propertyName.impl()); 84 if (location == m_propertyMap.end()) 85 return JSValue(); 86 return location->value.get(); 87 } 88 89 void setPrivateProperty(VM& vm, JSCell* owner, const Identifier& propertyName, JSValue value) 90 { 91 WriteBarrier<Unknown> empty; 92 m_propertyMap.add(propertyName.impl(), empty).iterator->value.set(vm, owner, value); 93 } 94 95 void deletePrivateProperty(const Identifier& propertyName) 96 { 97 m_propertyMap.remove(propertyName.impl()); 98 } 99 100 void visitChildren(SlotVisitor& visitor) 101 { 102 for (PrivatePropertyMap::iterator ptr = m_propertyMap.begin(); ptr != m_propertyMap.end(); ++ptr) { 103 if (ptr->value) 104 visitor.append(&ptr->value); 105 } 106 } 107 108 private: 109 typedef HashMap<RefPtr<StringImpl>, WriteBarrier<Unknown>, IdentifierRepHash> PrivatePropertyMap; 110 PrivatePropertyMap m_propertyMap; 111 }; 112 OwnPtr<JSPrivatePropertyMap> m_privateProperties; 113 virtual void finalize(Handle<Unknown>, void*) override; 114}; 115 116 117template <class Parent> 118class JSCallbackObject : public Parent { 119protected: 120 JSCallbackObject(ExecState*, Structure*, JSClassRef, void* data); 121 JSCallbackObject(VM&, JSClassRef, Structure*); 122 123 void finishCreation(ExecState*); 124 void finishCreation(VM&); 125 126public: 127 typedef Parent Base; 128 129 static JSCallbackObject* create(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, JSClassRef classRef, void* data) 130 { 131 ASSERT_UNUSED(globalObject, !structure->globalObject() || structure->globalObject() == globalObject); 132 JSCallbackObject* callbackObject = new (NotNull, allocateCell<JSCallbackObject>(*exec->heap())) JSCallbackObject(exec, structure, classRef, data); 133 callbackObject->finishCreation(exec); 134 return callbackObject; 135 } 136 static JSCallbackObject<Parent>* create(VM&, JSClassRef, Structure*); 137 138 static const bool needsDestruction; 139 static void destroy(JSCell* cell) 140 { 141 static_cast<JSCallbackObject*>(cell)->JSCallbackObject::~JSCallbackObject(); 142 } 143 144 void setPrivate(void* data); 145 void* getPrivate(); 146 147 DECLARE_INFO; 148 149 JSClassRef classRef() const { return m_callbackObjectData->jsClass; } 150 bool inherits(JSClassRef) const; 151 152 static Structure* createStructure(VM&, JSGlobalObject*, JSValue); 153 154 JSValue getPrivateProperty(const Identifier& propertyName) const 155 { 156 return m_callbackObjectData->getPrivateProperty(propertyName); 157 } 158 159 void setPrivateProperty(VM& vm, const Identifier& propertyName, JSValue value) 160 { 161 m_callbackObjectData->setPrivateProperty(vm, this, propertyName, value); 162 } 163 164 void deletePrivateProperty(const Identifier& propertyName) 165 { 166 m_callbackObjectData->deletePrivateProperty(propertyName); 167 } 168 169 using Parent::methodTable; 170 171protected: 172 static const unsigned StructureFlags = ProhibitsPropertyCaching | OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | ImplementsHasInstance | OverridesHasInstance | OverridesVisitChildren | OverridesGetPropertyNames | Parent::StructureFlags; 173 174private: 175 static String className(const JSObject*); 176 177 static JSValue defaultValue(const JSObject*, ExecState*, PreferredPrimitiveType); 178 179 static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&); 180 static bool getOwnPropertySlotByIndex(JSObject*, ExecState*, unsigned propertyName, PropertySlot&); 181 182 static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&); 183 static void putByIndex(JSCell*, ExecState*, unsigned, JSValue, bool shouldThrow); 184 185 static bool deleteProperty(JSCell*, ExecState*, PropertyName); 186 static bool deletePropertyByIndex(JSCell*, ExecState*, unsigned); 187 188 static bool customHasInstance(JSObject*, ExecState*, JSValue); 189 190 static void getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode); 191 192 static ConstructType getConstructData(JSCell*, ConstructData&); 193 static CallType getCallData(JSCell*, CallData&); 194 195 static void visitChildren(JSCell* cell, SlotVisitor& visitor) 196 { 197 JSCallbackObject* thisObject = jsCast<JSCallbackObject*>(cell); 198 ASSERT_GC_OBJECT_INHERITS((static_cast<Parent*>(thisObject)), JSCallbackObject<Parent>::info()); 199 COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag); 200 ASSERT(thisObject->Parent::structure()->typeInfo().overridesVisitChildren()); 201 Parent::visitChildren(thisObject, visitor); 202 thisObject->m_callbackObjectData->visitChildren(visitor); 203 } 204 205 void init(ExecState*); 206 207 static JSCallbackObject* asCallbackObject(JSValue); 208 static JSCallbackObject* asCallbackObject(EncodedJSValue); 209 210 static EncodedJSValue JSC_HOST_CALL call(ExecState*); 211 static EncodedJSValue JSC_HOST_CALL construct(ExecState*); 212 213 JSValue getStaticValue(ExecState*, PropertyName); 214 static EncodedJSValue staticFunctionGetter(ExecState*, JSObject*, EncodedJSValue, PropertyName); 215 static EncodedJSValue callbackGetter(ExecState*, JSObject*, EncodedJSValue, PropertyName); 216 217 OwnPtr<JSCallbackObjectData> m_callbackObjectData; 218}; 219 220} // namespace JSC 221 222// include the actual template class implementation 223#include "JSCallbackObjectFunctions.h" 224 225#endif // JSCallbackObject_h 226