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// 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 THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_SCROLLING_SCROLL_CUSTOMIZATION_CALLBACKS_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_SCROLLING_SCROLL_CUSTOMIZATION_CALLBACKS_H_
#include "base/macros.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
namespace blink {
class Node;
class ScrollStateCallback;
class CORE_EXPORT ScrollCustomizationCallbacks
: public GarbageCollected<ScrollCustomizationCallbacks> {
public:
ScrollCustomizationCallbacks() = default;
void SetDistributeScroll(Node*, ScrollStateCallback*);
ScrollStateCallback* GetDistributeScroll(Node*);
void SetApplyScroll(Node*, ScrollStateCallback*);
void RemoveApplyScroll(Node*);
ScrollStateCallback* GetApplyScroll(Node*);
bool InScrollPhase(Node*) const;
void SetInScrollPhase(Node*, bool);
void Trace(blink::Visitor* visitor) {
visitor->Trace(apply_scroll_callbacks_);
visitor->Trace(distribute_scroll_callbacks_);
visitor->Trace(in_scrolling_phase_);
}
private:
using ScrollStateCallbackList =
HeapHashMap<WeakMember<Node>, Member<ScrollStateCallback>>;
ScrollStateCallbackList apply_scroll_callbacks_;
ScrollStateCallbackList distribute_scroll_callbacks_;
HeapHashMap<WeakMember<Node>, bool> in_scrolling_phase_;
DISALLOW_COPY_AND_ASSIGN(ScrollCustomizationCallbacks);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_SCROLLING_SCROLL_CUSTOMIZATION_CALLBACKS_H_
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