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32 #include "V8HTMLImageElementConstructor.h"
34 #include "HTMLImageElement.h"
37 #include "HTMLNames.h"
38 #include "V8Binding.h"
39 #include "V8Document.h"
40 #include "V8HTMLImageElement.h"
43 #include <wtf/RefPtr.h>
47 WrapperTypeInfo V8HTMLImageElementConstructor::info = { V8HTMLImageElementConstructor::GetTemplate, 0, 0, 0 };
49 static v8::Handle<v8::Value> v8HTMLImageElementConstructorCallback(const v8::Arguments& args)
51 INC_STATS("DOM.HTMLImageElement.Contructor");
53 if (!args.IsConstructCall())
54 return throwError("DOM object constructor cannot be called as a function.", V8Proxy::TypeError);
56 Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
58 return throwError("Image constructor associated frame is unavailable", V8Proxy::ReferenceError);
60 Document* document = frame->document();
62 return throwError("Image constructor associated document is unavailable", V8Proxy::ReferenceError);
64 // Make sure the document is added to the DOM Node map. Otherwise, the HTMLImageElement instance
65 // may end up being the only node in the map and get garbage-ccollected prematurely.
66 // FIXME: The correct way to do this would be to make HTMLImageElement derive from
67 // ActiveDOMObject and use its interface to keep its wrapper alive. Then we would
68 // remove this code and the special case in isObservableThroughDOM.
73 int* optionalWidth = 0;
74 int* optionalHeight = 0;
75 if (args.Length() > 0) {
76 width = toInt32(args[0]);
77 optionalWidth = &width;
79 if (args.Length() > 1) {
80 height = toInt32(args[1]);
81 optionalHeight = &height;
84 RefPtr<HTMLImageElement> image = HTMLImageElement::createForJSConstructor(document, optionalWidth, optionalHeight);
85 V8DOMWrapper::setDOMWrapper(args.Holder(), &V8HTMLImageElementConstructor::info, image.get());
87 V8DOMWrapper::setJSWrapperForDOMNode(image.get(), v8::Persistent<v8::Object>::New(args.Holder()));
91 v8::Persistent<v8::FunctionTemplate> V8HTMLImageElementConstructor::GetTemplate()
93 static v8::Persistent<v8::FunctionTemplate> cachedTemplate;
94 if (!cachedTemplate.IsEmpty())
95 return cachedTemplate;
97 v8::HandleScope scope;
98 v8::Local<v8::FunctionTemplate> result = v8::FunctionTemplate::New(v8HTMLImageElementConstructorCallback);
100 v8::Local<v8::ObjectTemplate> instance = result->InstanceTemplate();
101 instance->SetInternalFieldCount(V8HTMLImageElement::internalFieldCount);
102 result->SetClassName(v8::String::New("HTMLImageElement"));
103 result->Inherit(V8HTMLImageElement::GetTemplate());
105 cachedTemplate = v8::Persistent<v8::FunctionTemplate>::New(result);
106 return cachedTemplate;
109 } // namespace WebCore