1 /*
2 * Copyright (C) 2010 Google Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27 #ifndef EventContext_h
28 #define EventContext_h
29
30 #include "core/events/EventTarget.h"
31 #include "core/dom/Node.h"
32 #include "core/dom/StaticNodeList.h"
33 #include "core/dom/TreeScope.h"
34 #include "wtf/RefPtr.h"
35
36 namespace WebCore {
37
38 class Event;
39 class TouchList;
40
41 class TouchEventContext : public RefCounted<TouchEventContext> {
42 public:
43 static PassRefPtr<TouchEventContext> create();
44 ~TouchEventContext();
45 void handleLocalEvents(Event*) const;
touches()46 TouchList* touches() { return m_touches.get(); }
targetTouches()47 TouchList* targetTouches() { return m_targetTouches.get(); }
changedTouches()48 TouchList* changedTouches() { return m_changedTouches.get(); }
49
50 private:
51 TouchEventContext();
52
53 RefPtr<TouchList> m_touches;
54 RefPtr<TouchList> m_targetTouches;
55 RefPtr<TouchList> m_changedTouches;
56 };
57
58 class EventContext {
59 public:
60 // FIXME: Use ContainerNode instead of Node.
61 EventContext(PassRefPtr<Node>, PassRefPtr<EventTarget> currentTarget);
62 ~EventContext();
63
node()64 Node* node() const { return m_node.get(); }
currentTarget()65 EventTarget* currentTarget() const { return m_currentTarget.get(); }
66
target()67 EventTarget* target() const { return m_target.get(); }
68 void setTarget(PassRefPtr<EventTarget>);
69
relatedTarget()70 EventTarget* relatedTarget() const { return m_relatedTarget.get(); }
71 void setRelatedTarget(PassRefPtr<EventTarget>);
72
touchEventContext()73 TouchEventContext* touchEventContext() const { return m_touchEventContext.get(); }
74 TouchEventContext* ensureTouchEventContext();
75
eventPath()76 PassRefPtr<NodeList> eventPath() const { return m_eventPath; }
77 void adoptEventPath(Vector<RefPtr<Node> >&);
setEventPath(PassRefPtr<NodeList> nodeList)78 void setEventPath(PassRefPtr<NodeList> nodeList) { m_eventPath = nodeList; }
79
currentTargetSameAsTarget()80 bool currentTargetSameAsTarget() const { return m_currentTarget.get() == m_target.get(); }
81 void handleLocalEvents(Event*) const;
82
83 protected:
84 #ifndef NDEBUG
85 bool isUnreachableNode(EventTarget*);
86 #endif
87 RefPtr<Node> m_node;
88 RefPtr<EventTarget> m_currentTarget;
89 RefPtr<EventTarget> m_target;
90 RefPtr<EventTarget> m_relatedTarget;
91 RefPtr<NodeList> m_eventPath;
92 RefPtr<TouchEventContext> m_touchEventContext;
93 };
94
95 #ifndef NDEBUG
isUnreachableNode(EventTarget * target)96 inline bool EventContext::isUnreachableNode(EventTarget* target)
97 {
98 // FIXME: Checks also for SVG elements.
99 return target && target->toNode() && !target->toNode()->isSVGElement() && !target->toNode()->treeScope().isInclusiveAncestorOf(m_node->treeScope());
100 }
101 #endif
102
setTarget(PassRefPtr<EventTarget> target)103 inline void EventContext::setTarget(PassRefPtr<EventTarget> target)
104 {
105 ASSERT(!isUnreachableNode(target.get()));
106 m_target = target;
107 }
108
setRelatedTarget(PassRefPtr<EventTarget> relatedTarget)109 inline void EventContext::setRelatedTarget(PassRefPtr<EventTarget> relatedTarget)
110 {
111 ASSERT(!isUnreachableNode(relatedTarget.get()));
112 m_relatedTarget = relatedTarget;
113 }
114
115 }
116
117 #endif // EventContext_h
118