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31 #ifndef V8PerContextData_h
32 #define V8PerContextData_h
34 #include "bindings/v8/CustomElementBinding.h"
35 #include "bindings/v8/ScopedPersistent.h"
36 #include "bindings/v8/V8PersistentValueMap.h"
37 #include "bindings/v8/WrapperTypeInfo.h"
38 #include "gin/public/context_holder.h"
39 #include "gin/public/gin_embedders.h"
41 #include "wtf/HashMap.h"
42 #include "wtf/PassOwnPtr.h"
43 #include "wtf/Vector.h"
44 #include "wtf/text/AtomicString.h"
45 #include "wtf/text/AtomicStringHash.h"
49 class CustomElementDefinition;
50 class V8DOMActivityLogger;
51 class V8PerContextData;
53 typedef WTF::Vector<V8NPObject*> V8NPObjectVector;
54 typedef WTF::HashMap<int, V8NPObjectVector> V8NPObjectMap;
56 enum V8ContextEmbedderDataField {
57 v8ContextDebugIdIndex = static_cast<int>(gin::kDebugIdIndex),
58 v8ContextPerContextDataIndex = static_cast<int>(gin::kPerContextDataStartIndex + gin::kEmbedderBlink),
61 class V8PerContextData {
63 static PassOwnPtr<V8PerContextData> create(v8::Handle<v8::Context>);
65 static V8PerContextData* from(v8::Handle<v8::Context>);
69 v8::Handle<v8::Context> context() { return m_context.newLocal(m_isolate); }
71 // To create JS Wrapper objects, we create a cache of a 'boiler plate'
72 // object, and then simply Clone that object each time we need a new one.
73 // This is faster than going through the full object creation process.
74 v8::Local<v8::Object> createWrapperFromCache(const WrapperTypeInfo* type)
76 v8::Local<v8::Object> boilerplate = m_wrapperBoilerplates.Get(type);
77 return !boilerplate.IsEmpty() ? boilerplate->Clone() : createWrapperFromCacheSlowCase(type);
80 v8::Local<v8::Function> constructorForType(const WrapperTypeInfo* type)
82 v8::Local<v8::Function> function = m_constructorMap.Get(type);
83 return (!function.IsEmpty()) ? function : constructorForTypeSlowCase(type);
86 v8::Local<v8::Object> prototypeForType(const WrapperTypeInfo*);
88 V8NPObjectMap* v8NPObjectMap() { return &m_v8NPObjectMap; }
90 void addCustomElementBinding(CustomElementDefinition*, PassOwnPtr<CustomElementBinding>);
91 void clearCustomElementBinding(CustomElementDefinition*);
92 CustomElementBinding* customElementBinding(CustomElementDefinition*);
94 V8DOMActivityLogger* activityLogger() const { return m_activityLogger; }
95 void setActivityLogger(V8DOMActivityLogger* activityLogger) { m_activityLogger = activityLogger; }
98 V8PerContextData(v8::Handle<v8::Context>);
100 v8::Local<v8::Object> createWrapperFromCacheSlowCase(const WrapperTypeInfo*);
101 v8::Local<v8::Function> constructorForTypeSlowCase(const WrapperTypeInfo*);
103 // For each possible type of wrapper, we keep a boilerplate object.
104 // The boilerplate is used to create additional wrappers of the same type.
105 typedef V8PersistentValueMap<const WrapperTypeInfo*, v8::Object, false> WrapperBoilerplateMap;
106 WrapperBoilerplateMap m_wrapperBoilerplates;
108 typedef V8PersistentValueMap<const WrapperTypeInfo*, v8::Function, false> ConstructorMap;
109 ConstructorMap m_constructorMap;
111 V8NPObjectMap m_v8NPObjectMap;
113 v8::Isolate* m_isolate;
114 OwnPtr<gin::ContextHolder> m_contextHolder;
116 ScopedPersistent<v8::Context> m_context;
117 ScopedPersistent<v8::Value> m_errorPrototype;
119 typedef WTF::HashMap<CustomElementDefinition*, OwnPtr<CustomElementBinding> > CustomElementBindingMap;
120 OwnPtr<CustomElementBindingMap> m_customElementBindings;
122 // This is owned by a static hash map in V8DOMActivityLogger.
123 V8DOMActivityLogger* m_activityLogger;
126 class V8PerContextDebugData {
128 static bool setContextDebugData(v8::Handle<v8::Context>, const char* worldName, int debugId);
129 static int contextDebugId(v8::Handle<v8::Context>);
132 } // namespace WebCore
134 #endif // V8PerContextData_h