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32 #include "bindings/v8/V8EventListener.h"
34 #include "bindings/v8/ScriptController.h"
35 #include "bindings/v8/V8Binding.h"
36 #include "core/dom/Document.h"
37 #include "core/frame/LocalFrame.h"
41 V8EventListener::V8EventListener(v8::Local<v8::Object> listener, bool isAttribute, ScriptState* scriptState)
42 : V8AbstractEventListener(isAttribute, scriptState)
44 setListenerObject(listener);
47 v8::Local<v8::Function> V8EventListener::getListenerFunction(ExecutionContext*)
49 v8::Local<v8::Object> listener = getListenerObject(scriptState()->executionContext());
51 // Has the listener been disposed?
52 if (listener.IsEmpty())
53 return v8::Local<v8::Function>();
55 if (listener->IsFunction())
56 return v8::Local<v8::Function>::Cast(listener);
58 if (listener->IsObject()) {
59 ASSERT_WITH_MESSAGE(!isAttribute(), "EventHandler attributes should only accept JS Functions as input.");
60 v8::Local<v8::Value> property = listener->Get(v8AtomicString(isolate(), "handleEvent"));
61 // Check that no exceptions were thrown when getting the
62 // handleEvent property and that the value is a function.
63 if (!property.IsEmpty() && property->IsFunction())
64 return v8::Local<v8::Function>::Cast(property);
67 return v8::Local<v8::Function>();
70 v8::Local<v8::Value> V8EventListener::callListenerFunction(v8::Handle<v8::Value> jsEvent, Event* event)
73 v8::Local<v8::Function> handlerFunction = getListenerFunction(scriptState()->executionContext());
74 v8::Local<v8::Object> receiver = getReceiverObject(event);
75 if (handlerFunction.IsEmpty() || receiver.IsEmpty())
76 return v8::Local<v8::Value>();
78 if (!scriptState()->executionContext()->isDocument())
79 return v8::Local<v8::Value>();
81 LocalFrame* frame = toDocument(scriptState()->executionContext())->frame();
83 return v8::Local<v8::Value>();
85 if (!frame->script().canExecuteScripts(AboutToExecuteScript))
86 return v8::Local<v8::Value>();
88 v8::Handle<v8::Value> parameters[1] = { jsEvent };
89 return frame->script().callFunction(handlerFunction, receiver, WTF_ARRAY_LENGTH(parameters), parameters);
92 } // namespace WebCore