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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 PointerEventManager_h | |
| 6 #define PointerEventManager_h | |
| 7 | |
| 8 #include "core/CoreExport.h" | |
| 9 #include "core/events/PointerEvent.h" | |
| 10 #include "public/platform/WebPointerProperties.h" | |
| 11 #include "wtf/Allocator.h" | |
| 12 #include "wtf/HashMap.h" | |
| 13 | |
| 14 namespace blink { | |
| 15 | |
| 16 /** | |
| 17 Helper class for tracking the pointer ids for each type of PointerEvents. | |
| 18 Using id re-mapping at this layer, this class makes sure that regardless of th
e | |
| 19 domain of the id (i.e. in touch or pen) the corresponding pointer event will h
ave | |
| 20 a unique id amongst all pointer events as per pointer events' specification. | |
| 21 This class intended to behave the same as existing browsers as much as possibl
e | |
| 22 for compatibility reasons. Particularly it behaves very similar to MS Edge to
have | |
| 23 pointer event ids generated by mouse always equal 1 and those that are generat
ed | |
| 24 by touch and pen will have increasing ids from 2. | |
| 25 */ | |
| 26 class CORE_EXPORT PointerEventManager { | |
| 27 DISALLOW_NEW(); | |
| 28 public: | |
| 29 | |
| 30 PassRefPtrWillBeRawPtr<PointerEvent> create(const AtomicString& type, | |
| 31 const PlatformMouseEvent&, PassRefPtrWillBeRawPtr<Node> relatedTarget, | |
| 32 PassRefPtrWillBeRawPtr<AbstractView>); | |
| 33 | |
| 34 PassRefPtrWillBeRawPtr<PointerEvent> create(const AtomicString& type, | |
| 35 const PlatformTouchPoint&, PlatformEvent::Modifiers, | |
| 36 const double width, const double height, | |
| 37 const double clientX, const double clientY); | |
| 38 | |
| 39 PassRefPtrWillBeRawPtr<PointerEvent> createPointerCancel(const PlatformTouch
Point&); | |
| 40 | |
| 41 PointerEventManager(); | |
| 42 ~PointerEventManager(); | |
| 43 | |
| 44 // Clear all the existing ids. | |
| 45 void clear(); | |
| 46 /* | |
| 47 * When a pointerEvent with a particular id is removed that id is considered | |
| 48 * free even though there might have been other PointerEvents that were | |
| 49 * generated with the same id before. | |
| 50 */ | |
| 51 void remove(const PassRefPtrWillBeRawPtr<PointerEvent>); | |
| 52 | |
| 53 // Returns the node capturing this pointer id, and null if no node is captur
ing it. | |
| 54 EventTarget* getCapturingNode(PassRefPtrWillBeRawPtr<PointerEvent>); | |
| 55 | |
| 56 private: | |
| 57 typedef long MappedId; | |
| 58 typedef std::pair<int, int> IncomingId; | |
| 59 | |
| 60 MappedId add(const IncomingId); | |
| 61 bool isPrimary(const MappedId) const; | |
| 62 void setIdAndType(PointerEventInit &, const WebPointerProperties &); | |
| 63 | |
| 64 static const MappedId s_invalidId; | |
| 65 static const MappedId s_mouseId; | |
| 66 | |
| 67 PointerEventManager::MappedId m_currentId; | |
| 68 HashMap<IncomingId, MappedId, WTF::PairHash<int, int>, WTF::PairHashTraits<W
TF::UnsignedWithZeroKeyHashTraits<int>, WTF::UnsignedWithZeroKeyHashTraits<int>>
> m_idMapping; | |
| 69 HashMap<MappedId, IncomingId, WTF::IntHash<MappedId>, WTF::UnsignedWithZeroK
eyHashTraits<MappedId>> m_idReverseMapping; | |
| 70 MappedId m_primaryId[static_cast<int>(WebPointerProperties::PointerType::Las
tEntry) + 1]; | |
| 71 MappedId m_idCount[static_cast<int>(WebPointerProperties::PointerType::LastE
ntry) + 1]; | |
| 72 }; | |
| 73 | |
| 74 } // namespace blink | |
| 75 | |
| 76 #endif // PointerEventManager_h | |
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Chromium Code Reviews
Issue 1670073004:
Send node transition events for touch events (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master