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/*
* Copyright (C) 2006 Apple Computer, Inc.
* Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
* Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef HitTestRequest_h
#define HitTestRequest_h
#include "wtf/Allocator.h"
#include "wtf/Assertions.h"
namespace blink {
class HitTestRequest {
DISALLOW_NEW();
public:
enum RequestType {
ReadOnly = 1 << 1,
Active = 1 << 2,
Move = 1 << 3,
Release = 1 << 4,
IgnoreClipping = 1 << 5,
SVGClipContent = 1 << 6,
TouchEvent = 1 << 7,
AllowChildFrameContent = 1 << 8,
ChildFrameHitTest = 1 << 9,
IgnorePointerEventsNone = 1 << 10,
// Collect a list of nodes instead of just one.
// (This is for elementsFromPoint and rect-based tests).
ListBased = 1 << 11,
// When using list-based testing, this flag causes us to continue hit
// testing after a hit has been found.
PenetratingList = 1 << 12,
AvoidCache = 1 << 13,
};
typedef unsigned HitTestRequestType;
HitTestRequest(HitTestRequestType requestType)
: m_requestType(requestType)
{
// Penetrating lists should also be list-based.
ASSERT(!(requestType & PenetratingList) || (requestType & ListBased));
}
bool readOnly() const { return m_requestType & ReadOnly; }
bool active() const { return m_requestType & Active; }
bool move() const { return m_requestType & Move; }
bool release() const { return m_requestType & Release; }
bool ignoreClipping() const { return m_requestType & IgnoreClipping; }
bool svgClipContent() const { return m_requestType & SVGClipContent; }
bool touchEvent() const { return m_requestType & TouchEvent; }
bool allowsChildFrameContent() const { return m_requestType & AllowChildFrameContent; }
bool isChildFrameHitTest() const { return m_requestType & ChildFrameHitTest; }
bool ignorePointerEventsNone() const { return m_requestType & IgnorePointerEventsNone; }
bool listBased() const { return m_requestType & ListBased; }
bool penetratingList() const { return m_requestType & PenetratingList; }
bool avoidCache() const { return m_requestType & AvoidCache; }
// Convenience functions
bool touchMove() const { return move() && touchEvent(); }
HitTestRequestType type() const { return m_requestType; }
// The Cacheability bits don't affect hit testing computation.
// TODO(dtapuska): These bits really shouldn't be fields on the HitTestRequest as
// they don't influence the result; but rather are hints on the output as to what to do.
// Perhaps move these fields to another enum ?
static const HitTestRequestType CacheabilityBits = ReadOnly | Active | Move | Release | TouchEvent;
bool equalForCacheability(const HitTestRequest& value) const
{
return (m_requestType | CacheabilityBits) == (value.m_requestType | CacheabilityBits);
}
private:
HitTestRequestType m_requestType;
};
} // namespace blink
#endif // HitTestRequest_h
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