[V8] convertEventTargetToV8Object doesn't need to be overloaded
[WebKit-https.git] / Source / WebCore / bindings / v8 / V8DOMWrapper.h
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30
31 #ifndef V8DOMWrapper_h
32 #define V8DOMWrapper_h
33
34 #include "DOMDataStore.h"
35 #include "Event.h"
36 #include "Node.h"
37 #include "NodeFilter.h"
38 #include "V8CustomXPathNSResolver.h"
39 #include "V8DOMMap.h"
40 #include "V8IsolatedContext.h"
41 #include "V8Utilities.h"
42 #include "WrapperTypeInfo.h"
43 #include <v8.h>
44 #include <wtf/MainThread.h>
45 #include <wtf/PassRefPtr.h>
46 #include <wtf/text/WTFString.h>
47
48 namespace WebCore {
49
50     class DOMWindow;
51     class EventTarget;
52     class Frame;
53     class Node;
54     class V8PerContextData;
55     class WorkerContext;
56
57     enum ListenerLookupType {
58         ListenerFindOnly,
59         ListenerFindOrCreate,
60     };
61
62     class V8DOMWrapper {
63     public:
64 #ifndef NDEBUG
65         // Checks if a v8 value can be a DOM wrapper
66         static bool maybeDOMWrapper(v8::Handle<v8::Value>);
67 #endif
68
69         // Sets contents of a DOM wrapper.
70         static void setDOMWrapper(v8::Handle<v8::Object> object, WrapperTypeInfo* type, void* cptr)
71         {
72             ASSERT(object->InternalFieldCount() >= 2);
73             object->SetPointerInInternalField(v8DOMWrapperObjectIndex, cptr);
74             object->SetPointerInInternalField(v8DOMWrapperTypeIndex, type);
75         }
76
77         static v8::Handle<v8::Object> lookupDOMWrapper(v8::Handle<v8::FunctionTemplate> functionTemplate, v8::Handle<v8::Object> object)
78         {
79             return object.IsEmpty() ? object : object->FindInstanceInPrototypeChain(functionTemplate);
80         }
81
82         static WrapperTypeInfo* domWrapperType(v8::Handle<v8::Object>);
83
84         static v8::Handle<v8::Value> convertEventTargetToV8Object(EventTarget*, v8::Handle<v8::Object> creationContext = v8::Handle<v8::Object>(), v8::Isolate* = 0);
85
86         static PassRefPtr<EventListener> getEventListener(v8::Local<v8::Value> value, bool isAttribute, ListenerLookupType lookup);
87
88         // Wrap JS node filter in C++.
89         static PassRefPtr<NodeFilter> wrapNativeNodeFilter(v8::Handle<v8::Value>);
90
91         static v8::Local<v8::Function> constructorForType(WrapperTypeInfo*, DOMWindow*);
92 #if ENABLE(WORKERS)
93         static v8::Local<v8::Function> constructorForType(WrapperTypeInfo*, WorkerContext*);
94 #endif
95
96         template<typename T>
97         static v8::Persistent<v8::Object> setJSWrapperForDOMObject(PassRefPtr<T>, v8::Handle<v8::Object>, v8::Isolate* = 0);
98         template<typename T>
99         static v8::Persistent<v8::Object> setJSWrapperForActiveDOMObject(PassRefPtr<T>, v8::Handle<v8::Object>, v8::Isolate* = 0);
100         static v8::Persistent<v8::Object> setJSWrapperForDOMNode(PassRefPtr<Node>, v8::Handle<v8::Object>, v8::Isolate* = 0);
101         static v8::Persistent<v8::Object> setJSWrapperForActiveDOMNode(PassRefPtr<Node>, v8::Handle<v8::Object>, v8::Isolate* = 0);
102
103         static bool isValidDOMObject(v8::Handle<v8::Value>);
104
105         // Check whether a V8 value is a wrapper of type |classType|.
106         static bool isWrapperOfType(v8::Handle<v8::Value>, WrapperTypeInfo*);
107
108         // Proper object lifetime support.
109         //
110         // Helper functions to make sure the child object stays alive
111         // while the parent is alive. Using the name more than once
112         // overwrites previous references making it possible to free
113         // old children.
114         static void setNamedHiddenReference(v8::Handle<v8::Object> parent, const char* name, v8::Handle<v8::Value> child);
115         static void setNamedHiddenWindowReference(Frame*, const char*, v8::Handle<v8::Value>);
116
117         static v8::Local<v8::Object> instantiateV8Object(WrapperTypeInfo*, void*);
118
119         static v8::Handle<v8::Object> getCachedWrapper(Node* node)
120         {
121             ASSERT(isMainThread());
122             if (LIKELY(!DOMWrapperWorld::isolatedWorldsExist())) {
123                 v8::Persistent<v8::Object>* wrapper = node->wrapper();
124                 if (LIKELY(!!wrapper))
125                     return *wrapper;
126             }
127
128             V8IsolatedContext* context = V8IsolatedContext::getEntered();
129             if (LIKELY(!context)) {
130                 v8::Persistent<v8::Object>* wrapper = node->wrapper();
131                 if (!wrapper)
132                     return v8::Handle<v8::Object>();
133                 return *wrapper;
134             }
135             DOMDataStore* store = context->world()->domDataStore();
136             DOMNodeMapping& domNodeMap = node->isActiveNode() ? store->activeDomNodeMap() : store->domNodeMap();
137             return domNodeMap.get(node);
138         }
139     private:
140 #if ENABLE(WORKERS)
141         static V8PerContextData* perContextData(WorkerContext*);
142 #endif
143     };
144
145     template<typename T>
146     v8::Persistent<v8::Object> V8DOMWrapper::setJSWrapperForDOMObject(PassRefPtr<T> object, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
147     {
148         v8::Persistent<v8::Object> wrapperHandle = v8::Persistent<v8::Object>::New(wrapper);
149         ASSERT(maybeDOMWrapper(wrapperHandle));
150         ASSERT(!domWrapperType(wrapperHandle)->toActiveDOMObjectFunction);
151         getDOMObjectMap(isolate).set(object.leakRef(), wrapperHandle);
152         return wrapperHandle;
153     }
154
155     template<typename T>
156     v8::Persistent<v8::Object> V8DOMWrapper::setJSWrapperForActiveDOMObject(PassRefPtr<T> object, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
157     {
158         v8::Persistent<v8::Object> wrapperHandle = v8::Persistent<v8::Object>::New(wrapper);
159         ASSERT(maybeDOMWrapper(wrapperHandle));
160         ASSERT(domWrapperType(wrapperHandle)->toActiveDOMObjectFunction);
161         getActiveDOMObjectMap(isolate).set(object.leakRef(), wrapperHandle);
162         return wrapperHandle;
163     }
164 }
165
166 #endif // V8DOMWrapper_h