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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef PointerEventUtils_h | |
Rick Byers
2015/06/16 17:25:38
Do you have plans to add other "utils" here? Usua
mustaq
2015/06/16 20:18:42
Done.
| |
6 #define PointerEventUtils_h | |
7 | |
8 #include "wtf/ListHashSet.h" | |
9 | |
10 namespace blink { | |
11 | |
12 /** | |
13 Helps tracking the primary pointer id for PointerEvents. | |
14 */ | |
15 class PointerIdManager { | |
16 public: | |
17 PointerIdManager(); | |
18 ~PointerIdManager(); | |
19 void clear(); | |
20 void add(unsigned); | |
21 void remove(unsigned); | |
22 bool isPrimary(unsigned); | |
23 | |
24 private: | |
25 // TODO(mustaq): Add per-type state when we have support for non-touch Point erEvents. | |
26 ListHashSet<unsigned> m_ids; | |
27 bool m_hasPrimaryId; | |
28 }; | |
29 | |
30 } // namespace blink | |
31 | |
32 #endif // PointerEventUtils_h | |
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