Index: third_party/WebKit/Source/core/observer/ResizeObserver.h |
diff --git a/third_party/WebKit/Source/core/observer/ResizeObserver.h b/third_party/WebKit/Source/core/observer/ResizeObserver.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..7ef297d53cfbd83517c9a1241a5d9cf75dab7cc2 |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/observer/ResizeObserver.h |
@@ -0,0 +1,61 @@ |
+// Copyright 2016 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 ResizeObserver_h |
+#define ResizeObserver_h |
+ |
+#include "bindings/core/v8/ScriptWrappable.h" |
+#include "platform/heap/Handle.h" |
+ |
+namespace blink { |
+ |
+class Document; |
+class Element; |
+class ResizeObserverCallback; |
+class ResizeObserverEntry; |
+class ResizeObservation; |
+ |
+// ResizeObserver represents ResizeObserver javascript api: |
+// https://github.com/WICG/ResizeObserver/ |
+class ResizeObserver final : public GarbageCollectedFinalized<ResizeObserver>, public ScriptWrappable { |
+ DEFINE_WRAPPERTYPEINFO(); |
+public: |
+ static ResizeObserver* create(Document&, ResizeObserverCallback*); |
+ |
+ virtual ~ResizeObserver() {}; |
+ |
+ // API methods |
+ void observe(Element*); |
+ void unobserve(Element*); |
+ void disconnect(); |
+ |
+ DECLARE_TRACE(); |
+ |
+ // returns true if observations were found. |
+ bool gatherObservations(); |
+ |
+ void deliverObservations(); |
+ |
+ void clearObservations(); |
+ |
+private: |
+ |
+ using ObservationList = HeapLinkedHashSet<WeakMember<ResizeObservation>>; |
+ |
+ explicit ResizeObserver(ResizeObserverCallback*); |
+ |
+ Member<ResizeObserverCallback> m_callback; |
+ |
+ // List of elements we are observing |
+ ObservationList m_observations; |
+ |
+ // List of elements that have changes |
+ HeapVector<Member<ResizeObservation>> m_activeObservations; |
+ |
+}; |
+ |
+ |
+} // namespace blink |
+ |
+#endif // ResizeObserver_h |