1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 * Copyright (C) 2013-2017 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#pragma once
22
23#include "EventContext.h"
24#include "PseudoElement.h"
25#include "SVGElement.h"
26#include "SVGUseElement.h"
27#include <wtf/Forward.h>
28#include <wtf/Vector.h>
29
30namespace WebCore {
31
32class EventPath {
33public:
34 EventPath(Node& origin, Event&);
35 explicit EventPath(const Vector<EventTarget*>&);
36 explicit EventPath(const Vector<Element*>&);
37
38 bool isEmpty() const { return m_path.isEmpty(); }
39 size_t size() const { return m_path.size(); }
40 const EventContext& contextAt(size_t i) const { return *m_path[i]; }
41 EventContext& contextAt(size_t i) { return *m_path[i]; }
42
43 Vector<EventTarget*> computePathUnclosedToTarget(const EventTarget&) const;
44
45 static Node* eventTargetRespectingTargetRules(Node&);
46
47private:
48 void buildPath(Node& origin, Event&);
49 void setRelatedTarget(Node& origin, EventTarget&);
50
51#if ENABLE(TOUCH_EVENTS)
52 void retargetTouch(TouchEventContext::TouchListType, const Touch&);
53 void retargetTouchList(TouchEventContext::TouchListType, const TouchList*);
54 void retargetTouchLists(const TouchEvent&);
55#endif
56
57 Vector<std::unique_ptr<EventContext>, 32> m_path;
58};
59
60inline Node* EventPath::eventTargetRespectingTargetRules(Node& referenceNode)
61{
62 if (is<PseudoElement>(referenceNode))
63 return downcast<PseudoElement>(referenceNode).hostElement();
64
65 // Events sent to elements inside an SVG use element's shadow tree go to the use element.
66 if (is<SVGElement>(referenceNode)) {
67 if (auto useElement = downcast<SVGElement>(referenceNode).correspondingUseElement())
68 return useElement.get();
69 }
70
71 return &referenceNode;
72}
73
74} // namespace WebCore
75