[V8] ScriptWrappable should hold the wrapper handle directly (Dromaeo/dom-modify...
[WebKit-https.git] / Source / WebCore / bindings / v8 / V8DOMWrapper.h
1 /*
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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 "V8DOMWindowShell.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(PassRefPtr<EventTarget> eventTarget, v8::Handle<v8::Object> creationContext = v8::Handle<v8::Object>(), v8::Isolate* isolate = 0)
85         {
86             return convertEventTargetToV8Object(eventTarget.get(), creationContext, isolate);
87         }
88
89         static v8::Handle<v8::Value> convertEventTargetToV8Object(EventTarget*, v8::Handle<v8::Object> creationContext = v8::Handle<v8::Object>(), v8::Isolate* = 0);
90
91         static PassRefPtr<EventListener> getEventListener(v8::Local<v8::Value> value, bool isAttribute, ListenerLookupType lookup);
92
93         // Wrap JS node filter in C++.
94         static PassRefPtr<NodeFilter> wrapNativeNodeFilter(v8::Handle<v8::Value>);
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         static void setNamedHiddenReference(v8::Handle<v8::Object> parent, const char* name, v8::Handle<v8::Value> child);
109
110         static v8::Local<v8::Object> instantiateV8Object(Document*, WrapperTypeInfo*, void*);
111
112         static v8::Handle<v8::Object> getCachedWrapper(Node* node)
113         {
114             ASSERT(isMainThread());
115             if (LIKELY(!DOMWrapperWorld::isolatedWorldsExist())) {
116                 v8::Persistent<v8::Object> wrapper = node->wrapper();
117                 if (LIKELY(!wrapper.IsEmpty()))
118                     return wrapper;
119             }
120
121             V8DOMWindowShell* context = V8DOMWindowShell::getEntered();
122             if (LIKELY(!context))
123                 return node->wrapper();
124
125             DOMDataStore* store = context->world()->domDataStore();
126             DOMNodeMapping& domNodeMap = node->isActiveNode() ? store->activeDomNodeMap() : store->domNodeMap();
127             return domNodeMap.get(node);
128         }
129     };
130
131     template<typename T>
132     v8::Persistent<v8::Object> V8DOMWrapper::setJSWrapperForDOMObject(PassRefPtr<T> object, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
133     {
134         v8::Persistent<v8::Object> wrapperHandle = v8::Persistent<v8::Object>::New(wrapper);
135         ASSERT(maybeDOMWrapper(wrapperHandle));
136         ASSERT(!domWrapperType(wrapperHandle)->toActiveDOMObjectFunction);
137         getDOMObjectMap(isolate).set(object.leakRef(), wrapperHandle);
138         return wrapperHandle;
139     }
140
141     template<typename T>
142     v8::Persistent<v8::Object> V8DOMWrapper::setJSWrapperForActiveDOMObject(PassRefPtr<T> object, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
143     {
144         v8::Persistent<v8::Object> wrapperHandle = v8::Persistent<v8::Object>::New(wrapper);
145         ASSERT(maybeDOMWrapper(wrapperHandle));
146         ASSERT(domWrapperType(wrapperHandle)->toActiveDOMObjectFunction);
147         getActiveDOMObjectMap(isolate).set(object.leakRef(), wrapperHandle);
148         return wrapperHandle;
149     }
150 }
151
152 #endif // V8DOMWrapper_h