IntersectionObserver: second cut.

third_party/WebKit/Source/core/dom/IntersectionObserverRegistry.h

Index: third_party/WebKit/Source/core/dom/IntersectionObserverRegistry.h
diff --git a/third_party/WebKit/Source/core/dom/IntersectionObserverRegistry.h b/third_party/WebKit/Source/core/dom/IntersectionObserverRegistry.h
new file mode 100644
index 0000000000000000000000000000000000000000..5918e83da4a06a53f75218790889a16f282897db
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/IntersectionObserverRegistry.h
@@ -0,0 +1,44 @@
+// 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.
+
+#ifndef IntersectionObserverRegistry_h
+#define IntersectionObserverRegistry_h
+
+#include "core/dom/Element.h"
+#include "core/dom/IntersectionObserver.h"
+#include "platform/Timer.h"
+#include "platform/heap/Handle.h"
+#include "wtf/HashSet.h"
+#include "wtf/RefCounted.h"
+
+namespace blink {
+
+class Document;
+template<typename T> class Timer;
+
+class IntersectionObserverRegistry : public GarbageCollectedFinalized<IntersectionObserverRegistry> {

[esprehn, 2015/12/12 00:14:16]

controller or something

[szager1, 2015/12/16 19:15:37]

Renamed to IntersectionObserverController.

+public:
+    IntersectionObserverRegistry(Timer<Document>&);
+
+    void scheduleIntersectionObserverForDelivery(IntersectionObserver&);
+    void resumeSuspendedIntersectionObservers();
+    void deliverIntersectionObservations();
+    void computeTrackedIntersectionObservations();
+    void addTrackedObserver(IntersectionObserver&);
+    void removeTrackedObserversForRoot(Element*);

[esprehn, 2015/12/12 00:14:16]

reference

[szager1, 2015/12/16 19:15:37]

Done.

+
+    DECLARE_TRACE();
+
+private:
+    Timer<Document>& m_timer;

[esprehn, 2015/12/12 00:14:16]

this should live here, not in document

[szager1, 2015/12/16 19:15:37]

Done.

+    // IntersectionObservers for which this is the tracking document.
+    Member<IntersectionObserver::WeakHashSet> m_trackedIntersectionObservers;

[esprehn, 2015/12/12 00:14:16]

just put them as members? they don't need to be inside Member<>

[szager1, 2015/12/16 19:15:37]

Done.

+    // IntersectionObservers for which this is the execution context of the callback.
+    Member<IntersectionObserver::HashSet> m_activeIntersectionObservers;
+    Member<IntersectionObserver::HashSet> m_suspendedIntersectionObservers;

[esprehn, 2015/12/12 00:14:16]

ditto for these, also just write the types

[szager1, 2015/12/16 19:15:37]

Done.

+};
+
+} // namespace blink
+
+#endif // IntersectionObservationRegistry_h