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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 PointerIdManager_h | |
6 #define PointerIdManager_h | |
7 | |
8 #include "public/platform/WebPointerProperties.h" | |
9 #include "wtf/Allocator.h" | |
10 #include "wtf/ListHashSet.h" | |
11 | |
12 namespace blink { | |
13 | |
14 /** | |
15 Helper class for tracking the primary pointer id for each type of PointerEvent
s. | |
16 */ | |
17 class PointerIdManager { | |
18 DISALLOW_NEW(); | |
19 public: | |
20 PointerIdManager(); | |
21 ~PointerIdManager(); | |
22 void clear(); | |
23 void add(WebPointerProperties::PointerType, unsigned); | |
24 void remove(WebPointerProperties::PointerType, unsigned); | |
25 bool isPrimary(WebPointerProperties::PointerType, unsigned); | |
26 | |
27 private: | |
28 // TODO(crbug.com/537319): Switch to /one/ set of ids to guarantee uniquenes
s. | |
29 ListHashSet<unsigned> m_ids[static_cast<int>(WebPointerProperties::PointerTy
pe::LastEntry) + 1]; | |
30 bool m_hasPrimaryId[static_cast<int>(WebPointerProperties::PointerType::Last
Entry) + 1]; | |
31 }; | |
32 | |
33 } // namespace blink | |
34 | |
35 #endif // PointerIdManager_h | |
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