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/*
* Copyright (C) 2006 Apple Computer, Inc.
* 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 HitTestResult_h
#define HitTestResult_h
#include "core/rendering/HitTestLocation.h"
#include "core/rendering/HitTestRequest.h"
#include "platform/geometry/FloatQuad.h"
#include "platform/geometry/FloatRect.h"
#include "platform/geometry/LayoutRect.h"
#include "platform/heap/Handle.h"
#include "platform/text/TextDirection.h"
#include "wtf/Forward.h"
#include "wtf/ListHashSet.h"
#include "wtf/OwnPtr.h"
#include "wtf/RefPtr.h"
namespace blink {
class Element;
class LocalFrame;
class HTMLMediaElement;
class Image;
class KURL;
class Node;
class RenderObject;
class PositionWithAffinity;
class Scrollbar;
class HitTestResult {
DISALLOW_ALLOCATION();
public:
typedef WillBeHeapListHashSet<RefPtrWillBeMember<Node> > NodeSet;
HitTestResult();
HitTestResult(const LayoutPoint&);
// Pass positive padding values to perform a rect-based hit test.
HitTestResult(const LayoutPoint& centerPoint, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding);
HitTestResult(const HitTestLocation&);
HitTestResult(const HitTestResult&);
~HitTestResult();
HitTestResult& operator=(const HitTestResult&);
void trace(Visitor*);
// For point-based hit tests, these accessors provide information about the node
// under the point. For rect-based hit tests they are meaningless (reflect the
// last candidate node observed in the rect).
// FIXME: Make these less error-prone for rect-based hit tests (center point or fail).
Node* innerNode() const { return m_innerNode.get(); }
Node* innerPossiblyPseudoNode() const { return m_innerPossiblyPseudoNode.get(); }
Element* innerElement() const;
Node* innerNonSharedNode() const { return m_innerNonSharedNode.get(); }
Element* URLElement() const { return m_innerURLElement.get(); }
Scrollbar* scrollbar() const { return m_scrollbar.get(); }
bool isOverWidget() const { return m_isOverWidget; }
// Forwarded from HitTestLocation
bool isRectBasedTest() const { return m_hitTestLocation.isRectBasedTest(); }
// The hit-tested point in the coordinates of the main frame.
const LayoutPoint& pointInMainFrame() const { return m_hitTestLocation.point(); }
IntPoint roundedPointInMainFrame() const { return roundedIntPoint(pointInMainFrame()); }
// The hit-tested point in the coordinates of the innerNode frame, the frame containing innerNode.
const LayoutPoint& pointInInnerNodeFrame() const { return m_pointInInnerNodeFrame; }
IntPoint roundedPointInInnerNodeFrame() const { return roundedIntPoint(pointInInnerNodeFrame()); }
LocalFrame* innerNodeFrame() const;
// The hit-tested point in the coordinates of the inner node.
const LayoutPoint& localPoint() const { return m_localPoint; }
void setLocalPoint(const LayoutPoint& p) { m_localPoint = p; }
PositionWithAffinity position() const;
RenderObject* renderer() const;
void setToShadowHostIfInUserAgentShadowRoot();
const HitTestLocation& hitTestLocation() const { return m_hitTestLocation; }
void setInnerNode(Node*);
void setInnerNonSharedNode(Node*);
void setURLElement(Element*);
void setScrollbar(Scrollbar*);
void setIsOverWidget(bool b) { m_isOverWidget = b; }
bool isSelected() const;
String spellingToolTip(TextDirection&) const;
String title(TextDirection&) const;
const AtomicString& altDisplayString() const;
Image* image() const;
IntRect imageRect() const;
KURL absoluteImageURL() const;
KURL absoluteMediaURL() const;
KURL absoluteLinkURL() const;
String textContent() const;
bool isLiveLink() const;
bool isMisspelled() const;
bool isContentEditable() const;
bool isOverLink() const;
// Returns true if it is rect-based hit test and needs to continue until the rect is fully
// enclosed by the boundaries of a node.
bool addNodeToRectBasedTestResult(Node*, const HitTestRequest&, const HitTestLocation& pointInContainer, const LayoutRect& = LayoutRect());
bool addNodeToRectBasedTestResult(Node*, const HitTestRequest&, const HitTestLocation& pointInContainer, const FloatRect&);
void append(const HitTestResult&);
// If m_rectBasedTestResult is 0 then set it to a new NodeSet. Return *m_rectBasedTestResult. Lazy allocation makes
// sense because the NodeSet is seldom necessary, and it's somewhat expensive to allocate and initialize. This method does
// the same thing as mutableRectBasedTestResult(), but here the return value is const.
const NodeSet& rectBasedTestResult() const;
// Collapse the rect-based test result into a single target at the specified location.
void resolveRectBasedTest(Node* resolvedInnerNode, const LayoutPoint& resolvedPointInMainFrame);
private:
NodeSet& mutableRectBasedTestResult(); // See above.
HTMLMediaElement* mediaElement() const;
HitTestLocation m_hitTestLocation;
RefPtrWillBeMember<Node> m_innerNode;
RefPtrWillBeMember<Node> m_innerPossiblyPseudoNode;
RefPtrWillBeMember<Node> m_innerNonSharedNode;
// FIXME: Nothing changes this to a value different from m_hitTestLocation!
LayoutPoint m_pointInInnerNodeFrame; // The hit-tested point in innerNode frame coordinates.
LayoutPoint m_localPoint; // A point in the local coordinate space of m_innerNonSharedNode's renderer. Allows us to efficiently
// determine where inside the renderer we hit on subsequent operations.
RefPtrWillBeMember<Element> m_innerURLElement;
RefPtrWillBeMember<Scrollbar> m_scrollbar;
bool m_isOverWidget; // Returns true if we are over a widget (and not in the border/padding area of a RenderPart for example).
mutable OwnPtrWillBeMember<NodeSet> m_rectBasedTestResult;
};
} // namespace blink
#endif // HitTestResult_h
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