IntersectionObserver: second cut.

third_party/WebKit/Source/bindings/core/v8/custom/V8IntersectionObserverCustom.cpp

Index: third_party/WebKit/Source/bindings/core/v8/custom/V8IntersectionObserverCustom.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/custom/V8IntersectionObserverCustom.cpp b/third_party/WebKit/Source/bindings/core/v8/custom/V8IntersectionObserverCustom.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2b2eaedd3f60468b29c32403b8016a04bd7f93af
--- /dev/null
+++ b/third_party/WebKit/Source/bindings/core/v8/custom/V8IntersectionObserverCustom.cpp
@@ -0,0 +1,52 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "bindings/core/v8/V8IntersectionObserver.h"
+
+#include "bindings/core/v8/ExceptionMessages.h"
+#include "bindings/core/v8/ExceptionState.h"
+#include "bindings/core/v8/V8Binding.h"
+#include "bindings/core/v8/V8DOMWrapper.h"
+#include "bindings/core/v8/V8GCController.h"
+#include "bindings/core/v8/V8IntersectionObserverCallback.h"
+#include "bindings/core/v8/V8IntersectionObserverInit.h"
+
+namespace blink {
+
+void V8IntersectionObserver::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    if (UNLIKELY(info.Length() < 1)) {
+        V8ThrowException::throwException(createMinimumArityTypeErrorForMethod(info.GetIsolate(), "createIntersectionObserver", "Intersection", 1, info.Length()), info.GetIsolate());
+        return;
+    }
+
+    v8::Local<v8::Object> wrapper = info.Holder();
+
+    if (!info[0]->IsFunction()) {
+        V8ThrowException::throwTypeError(info.GetIsolate(), ExceptionMessages::failedToExecute("createIntersectionObserver", "Intersection", "The callback provided as parameter 1 is not a function."));
+        return;
+    }
+
+    if (info.Length() > 1 && !isUndefinedOrNull(info[1]) && !info[1]->IsObject()) {
+        V8ThrowException::throwTypeError(info.GetIsolate(), ExceptionMessages::failedToExecute("createIntersectionObserver", "Intersection", "IntersectionObserverInit (parameter 2) is not an object."));
+        return;
+    }
+
+    OwnPtrWillBeRawPtr<IntersectionObserverCallback> callback = V8IntersectionObserverCallback::create(v8::Local<v8::Function>::Cast(info[0]), wrapper, ScriptState::current(info.GetIsolate()));
+
+    IntersectionObserverInit intersectionObserverInit;
+    ExceptionState exceptionState(ExceptionState::ConstructionContext, "Intersection", info.Holder(), info.GetIsolate());
+    V8IntersectionObserverInit::toImpl(info.GetIsolate(), info[1], intersectionObserverInit, exceptionState);
+    if (exceptionState.hadException())
+        return;
+
+    RefPtrWillBeRawPtr<IntersectionObserver> observer = IntersectionObserver::create(intersectionObserverInit, callback.release(), exceptionState);
+    if (exceptionState.hadException())
+        return;
+
+    v8SetReturnValue(info, V8DOMWrapper::associateObjectWithWrapper(info.GetIsolate(), observer.get(), &wrapperTypeInfo, wrapper));
+}
+
+} // namespace blink