| // Copyright 2017 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_INPUT_MOUSE_WHEEL_EVENT_MANAGER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_INPUT_MOUSE_WHEEL_EVENT_MANAGER_H_ |
| |
| #include "base/macros.h" |
| #include "third_party/blink/public/platform/web_input_event_result.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/heap/visitor.h" |
| |
| namespace blink { |
| |
| class Document; |
| class LocalFrame; |
| class LocalFrameView; |
| class Node; |
| class WebMouseWheelEvent; |
| |
| class MouseWheelEventManager final |
| : public GarbageCollectedFinalized<MouseWheelEventManager> { |
| public: |
| explicit MouseWheelEventManager(LocalFrame&); |
| void Trace(blink::Visitor*); |
| |
| void Clear(); |
| |
| WebInputEventResult HandleWheelEvent(const WebMouseWheelEvent&); |
| |
| void ElementRemoved(Node* target); |
| |
| private: |
| Node* FindTargetNode(const WebMouseWheelEvent&, |
| const Document*, |
| const LocalFrameView*); |
| |
| const Member<LocalFrame> frame_; |
| Member<Node> wheel_target_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MouseWheelEventManager); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_INPUT_MOUSE_WHEEL_EVENT_MANAGER_H_ |