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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EventPath_h
#define EventPath_h
#include "core/events/NodeEventContext.h"
#include "core/events/TreeScopeEventContext.h"
#include "core/events/WindowEventContext.h"
#include "platform/heap/Handle.h"
#include "wtf/HashMap.h"
#include "wtf/Vector.h"
namespace blink {
class Event;
class EventTarget;
class Node;
class TouchEvent;
class TouchList;
class TreeScope;
class EventPath final : public NoBaseWillBeGarbageCollectedFinalized<EventPath> {
public:
explicit EventPath(Node&, Event* = 0);
NodeEventContext& operator[](size_t index) { return m_nodeEventContexts[index]; }
const NodeEventContext& operator[](size_t index) const { return m_nodeEventContexts[index]; }
NodeEventContext& last() { return m_nodeEventContexts[size() - 1]; }
WindowEventContext& windowEventContext() { ASSERT(m_windowEventContext); return *m_windowEventContext; }
void ensureWindowEventContext();
bool isEmpty() const { return m_nodeEventContexts.isEmpty(); }
size_t size() const { return m_nodeEventContexts.size(); }
void adjustForRelatedTarget(Node&, EventTarget* relatedTarget);
void adjustForTouchEvent(TouchEvent&);
static EventTarget* eventTargetRespectingTargetRules(Node&);
void trace(Visitor*);
private:
EventPath();
NodeEventContext& at(size_t index) { return m_nodeEventContexts[index]; }
void addNodeEventContext(Node&);
void calculatePath();
void calculateAdjustedTargets();
void calculateTreeScopePrePostOrderNumbers();
void shrink(size_t newSize) { ASSERT(!m_windowEventContext); m_nodeEventContexts.shrink(newSize); }
void shrinkIfNeeded(const Node& target, const EventTarget& relatedTarget);
void adjustTouchList(const TouchList*, WillBeHeapVector<RawPtrWillBeMember<TouchList>> adjustedTouchList, const WillBeHeapVector<RawPtrWillBeMember<TreeScope>>& treeScopes);
typedef WillBeHeapHashMap<RawPtrWillBeMember<TreeScope>, RefPtrWillBeMember<TreeScopeEventContext>> TreeScopeEventContextMap;
TreeScopeEventContext* ensureTreeScopeEventContext(Node* currentTarget, TreeScope*, TreeScopeEventContextMap&);
typedef WillBeHeapHashMap<RawPtrWillBeMember<TreeScope>, RawPtrWillBeMember<EventTarget>> RelatedTargetMap;
static void buildRelatedNodeMap(const Node&, RelatedTargetMap&);
static EventTarget* findRelatedNode(TreeScope&, RelatedTargetMap&);
#if ENABLE(ASSERT)
static void checkReachability(TreeScope&, TouchList&);
#endif
const NodeEventContext& topNodeEventContext();
WillBeHeapVector<NodeEventContext, 64> m_nodeEventContexts;
RawPtrWillBeMember<Node> m_node;
RawPtrWillBeMember<Event> m_event;
WillBeHeapVector<RefPtrWillBeMember<TreeScopeEventContext>> m_treeScopeEventContexts;
OwnPtrWillBeMember<WindowEventContext> m_windowEventContext;
};
} // namespace
#endif
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