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Unified Diff: Source/core/page/scrolling/ScrollCustomizationCallbacks.h

Issue 1209183004: Expose scroll customization for touch to JS (behind REF). (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Address skobes' nits. Created 5 years, 5 months ago
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Index: Source/core/page/scrolling/ScrollCustomizationCallbacks.h
diff --git a/Source/core/page/scrolling/ScrollCustomizationCallbacks.h b/Source/core/page/scrolling/ScrollCustomizationCallbacks.h
new file mode 100644
index 0000000000000000000000000000000000000000..9c137a5305a296fe70461a5aebd1beb86f913392
--- /dev/null
+++ b/Source/core/page/scrolling/ScrollCustomizationCallbacks.h
@@ -0,0 +1,45 @@
+// 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 ScrollCustomizationCallbacks_h
+#define ScrollCustomizationCallbacks_h
+
+#include "core/CoreExport.h"
+#include "core/dom/Element.h"
+#include "platform/heap/Handle.h"
+#include "wtf/HashMap.h"
+
+namespace blink {
+
+class ScrollStateCallback;
+
+class CORE_EXPORT ScrollCustomizationCallbacks : public GarbageCollected<ScrollCustomizationCallbacks> {
+ WTF_MAKE_NONCOPYABLE(ScrollCustomizationCallbacks);
+
+public:
+ ScrollCustomizationCallbacks() {}
+ void setDistributeScroll(Element*, ScrollStateCallback*);
+ ScrollStateCallback* getDistributeScroll(Element*);
+ void setApplyScroll(Element*, ScrollStateCallback*);
+ ScrollStateCallback* getApplyScroll(Element*);
+
+ DEFINE_INLINE_TRACE()
+ {
+ visitor->trace(m_applyScrollCallbacks);
+ visitor->trace(m_distributeScrollCallbacks);
+ };
+
+#if !ENABLE(OILPAN)
+ void removeCallbacksForElement(Element*);
+#endif
+
+private:
+ using ScrollStateCallbackList = HeapHashMap<RawPtrWillBeWeakMember<Element>, Member<ScrollStateCallback>>;
+ ScrollStateCallbackList m_applyScrollCallbacks;
+ ScrollStateCallbackList m_distributeScrollCallbacks;
+};
+
+} // namespace blink
+
+#endif // ScrollCustomizationCallbacks_h
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