1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#ifndef EventRetargeter_h
21#define EventRetargeter_h
22
23#include "wtf/HashMap.h"
24#include "wtf/RefPtr.h"
25#include "wtf/Vector.h"
26
27namespace WebCore {
28
29class EventPath;
30class EventTarget;
31class FocusEvent;
32class MouseEvent;
33class Node;
34class TouchEvent;
35class TouchList;
36class TreeScope;
37
38class EventRetargeter {
39public:
40    static void adjustForMouseEvent(Node*, MouseEvent&);
41    static void adjustForFocusEvent(Node*, FocusEvent&);
42    typedef Vector<RefPtr<TouchList> > EventPathTouchLists;
43    static void adjustForTouchEvent(Node*, TouchEvent&);
44
45private:
46    typedef Vector<RefPtr<EventTarget> > AdjustedTargets;
47    typedef HashMap<TreeScope*, EventTarget*> RelatedTargetMap;
48    enum EventWithRelatedTargetDispatchBehavior {
49        StopAtBoundaryIfNeeded,
50        DoesNotStopAtBoundary
51    };
52    static void adjustForRelatedTarget(const Node*, EventTarget* relatedTarget, EventPath&);
53    static void calculateAdjustedNodes(const Node*, const Node* relatedNode, EventWithRelatedTargetDispatchBehavior, EventPath&, AdjustedTargets&);
54    static void buildRelatedNodeMap(const Node*, RelatedTargetMap&);
55    static EventTarget* findRelatedNode(TreeScope*, RelatedTargetMap&);
56    static void adjustTouchList(const Node*, const TouchList*, const EventPath&, EventPathTouchLists&);
57#ifndef NDEBUG
58    static void checkReachability(Node*, TouchList*);
59#endif
60};
61
62}
63
64#endif // EventRetargeter_h
65