Intersection Observer first draft

Source/bindings/core/v8/V8IntersectionObserverCallback.cpp

Index: Source/bindings/core/v8/V8IntersectionObserverCallback.cpp
diff --git a/Source/bindings/core/v8/V8IntersectionObserverCallback.cpp b/Source/bindings/core/v8/V8IntersectionObserverCallback.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..64c83316a4d691a075049db01862a350c7f46b3a
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+++ b/Source/bindings/core/v8/V8IntersectionObserverCallback.cpp
@@ -0,0 +1,75 @@
+// 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.
+
+// This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
+
+#include "config.h"
+#include "bindings/core/v8/V8IntersectionObserverCallback.h"
+
+#include "bindings/core/v8/ScriptController.h"
+#include "bindings/core/v8/V8Binding.h"
+#include "bindings/core/v8/V8IntersectionObserver.h"
+#include "core/dom/ExecutionContext.h"
+#include "wtf/Assertions.h"
+
+namespace blink {
+
+V8IntersectionObserverCallback::V8IntersectionObserverCallback(v8::Local<v8::Function> callback, v8::Local<v8::Object> owner, ScriptState* scriptState)
+    : ActiveDOMCallback(scriptState->executionContext())
+    , m_callback(scriptState->isolate(), callback)
+    , m_scriptState(scriptState)
+{
+    V8HiddenValue::setHiddenValue(scriptState->isolate(), owner, V8HiddenValue::callback(scriptState->isolate()), callback);
+    m_callback.setWeak(this, &setWeakCallback);
+}
+
+V8IntersectionObserverCallback::~V8IntersectionObserverCallback()
+{
+}
+
+void V8IntersectionObserverCallback::handleEvent(WillBeHeapVector<RefPtrWillBeMember<IntersectionObserverEntry>>& entries, IntersectionObserver* observer)
+{
+    if (!canInvokeCallback())
+        return;
+
+    if (!m_scriptState->contextIsValid())
+        return;
+    ScriptState::Scope scope(m_scriptState.get());
+
+    if (m_callback.isEmpty())
+        return;
+    v8::Local<v8::Value> observerHandle = toV8(observer, m_scriptState->context()->Global(), m_scriptState->isolate());
+    if (observerHandle.IsEmpty()) {
+        if (!isScriptControllerTerminating())
+            CRASH();
+        return;
+    }
+
+    if (!observerHandle->IsObject())
+        return;
+
+    v8::Local<v8::Object> thisObject = v8::Local<v8::Object>::Cast(observerHandle);
+    v8::Local<v8::Value> entriesHandle = toV8(entries, m_scriptState->context()->Global(), m_scriptState->isolate());
+    if (entriesHandle.IsEmpty()) {
+        return;
+    }
+    v8::Local<v8::Value> argv[] = { entriesHandle, observerHandle };
+
+    v8::TryCatch exceptionCatcher;
+    exceptionCatcher.SetVerbose(true);
+    ScriptController::callFunction(m_scriptState->executionContext(), m_callback.newLocal(m_scriptState->isolate()), thisObject, 2, argv, m_scriptState->isolate());
+}
+
+void V8IntersectionObserverCallback::setWeakCallback(const v8::WeakCallbackInfo<V8IntersectionObserverCallback>& data)
+{
+    data.GetParameter()->m_callback.clear();
+}
+
+DEFINE_TRACE(V8IntersectionObserverCallback)
+{
+    IntersectionObserverCallback::trace(visitor);
+    ActiveDOMCallback::trace(visitor);
+}
+
+} // namespace blink