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 | |
30 | namespace WebCore { |
31 | |
32 | class EventPath { |
33 | public: |
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 | |
47 | private: |
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 | |
60 | inline 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 | |