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31 #ifndef WrapperTypeInfo_h
32 #define WrapperTypeInfo_h
38 class ActiveDOMObject;
40 static const int v8DOMWrapperTypeIndex = 0;
41 static const int v8DOMWrapperObjectIndex = 1;
42 static const int v8DefaultWrapperInternalFieldCount = 2;
44 static const uint16_t v8DOMSubtreeClassId = 1;
46 typedef v8::Persistent<v8::FunctionTemplate> (*GetTemplateFunction)();
47 typedef void (*DerefObjectFunction)(void*);
48 typedef ActiveDOMObject* (*ToActiveDOMObjectFunction)(v8::Handle<v8::Object>);
50 // This struct provides a way to store a bunch of information that is helpful when unwrapping
51 // v8 objects. Each v8 bindings class has exactly one static WrapperTypeInfo member, so
52 // comparing pointers is a safe way to determine if types match.
53 struct WrapperTypeInfo {
55 static WrapperTypeInfo* unwrap(v8::Handle<v8::Value> typeInfoWrapper)
57 return reinterpret_cast<WrapperTypeInfo*>(v8::External::Unwrap(typeInfoWrapper));
61 bool equals(const WrapperTypeInfo* that) const
66 bool isSubclass(const WrapperTypeInfo* that) const
68 for (const WrapperTypeInfo* current = this; current; current = current->parentClass) {
76 v8::Persistent<v8::FunctionTemplate> getTemplate() { return getTemplateFunction(); }
78 void derefObject(void* object)
80 if (derefObjectFunction)
81 derefObjectFunction(object);
84 ActiveDOMObject* toActiveDOMObject(v8::Handle<v8::Object> object)
86 if (!toActiveDOMObjectFunction)
88 return toActiveDOMObjectFunction(object);
91 const GetTemplateFunction getTemplateFunction;
92 const DerefObjectFunction derefObjectFunction;
93 const ToActiveDOMObjectFunction toActiveDOMObjectFunction;
94 const WrapperTypeInfo* parentClass;
98 #endif // WrapperTypeInfo_h