JSMutationObserverCustom.cpp [plain text]
#include "config.h"
#include "JSMutationObserver.h"
#include "ExceptionCode.h"
#include "JSMutationCallback.h"
#include "JSNodeCustom.h"
#include "MutationObserver.h"
#include <runtime/Error.h>
#include <runtime/PrivateName.h>
using namespace JSC;
namespace WebCore {
EncodedJSValue JSC_HOST_CALL constructJSMutationObserver(ExecState* exec)
{
if (exec->argumentCount() < 1)
return throwVMError(exec, createNotEnoughArgumentsError(exec));
JSObject* object = exec->argument(0).getObject();
CallData callData;
if (!object || object->methodTable()->getCallData(object, callData) == CallTypeNone)
return throwVMError(exec, createTypeError(exec, "Callback argument must be a function"));
DOMConstructorObject* jsConstructor = jsCast<DOMConstructorObject*>(exec->callee());
RefPtr<JSMutationCallback> callback = JSMutationCallback::create(object, jsConstructor->globalObject());
JSObject* jsObserver = asObject(toJS(exec, jsConstructor->globalObject(), MutationObserver::create(callback.release())));
PrivateName propertyName;
jsObserver->putDirect(jsConstructor->globalObject()->vm(), propertyName, object);
return JSValue::encode(jsObserver);
}
bool JSMutationObserverOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor& visitor)
{
MutationObserver& observer = jsCast<JSMutationObserver*>(handle.slot()->asCell())->impl();
auto observedNodes = observer.getObservedNodes();
for (auto it = observedNodes.begin(), end = observedNodes.end(); it != end; ++it) {
if (visitor.containsOpaqueRoot(root(*it)))
return true;
}
return false;
}
}