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/*
* Copyright (C) 2004 Apple Computer, 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 Selection_h
#define Selection_h
#include "TextGranularity.h"
#include "VisiblePosition.h"
namespace WebCore {
class Position;
const EAffinity SEL_DEFAULT_AFFINITY = DOWNSTREAM;
class Selection {
public:
enum EState { NONE, CARET, RANGE };
enum EDirection { FORWARD, BACKWARD, RIGHT, LEFT };
Selection();
Selection(const Position&, EAffinity);
Selection(const Position&, const Position&, EAffinity);
Selection(const Range*, EAffinity = SEL_DEFAULT_AFFINITY);
Selection(const VisiblePosition&);
Selection(const VisiblePosition&, const VisiblePosition&);
static Selection selectionFromContentsOfNode(Node*);
EState state() const { return m_state; }
void setAffinity(EAffinity affinity) { m_affinity = affinity; }
EAffinity affinity() const { return m_affinity; }
void setBase(const Position&);
void setBase(const VisiblePosition&);
void setExtent(const Position&);
void setExtent(const VisiblePosition&);
Position base() const { return m_base; }
Position extent() const { return m_extent; }
Position start() const { return m_start; }
Position end() const { return m_end; }
VisiblePosition visibleStart() const { return VisiblePosition(m_start, isRange() ? DOWNSTREAM : affinity()); }
VisiblePosition visibleEnd() const { return VisiblePosition(m_end, isRange() ? UPSTREAM : affinity()); }
bool isNone() const { return state() == NONE; }
bool isCaret() const { return state() == CARET; }
bool isRange() const { return state() == RANGE; }
bool isCaretOrRange() const { return state() != NONE; }
bool isBaseFirst() const { return m_baseIsFirst; }
bool expandUsingGranularity(TextGranularity granularity);
TextGranularity granularity() const { return m_granularity; }
PassRefPtr<Range> toRange() const;
Element* rootEditableElement() const;
bool isContentEditable() const;
bool isContentRichlyEditable() const;
void debugPosition() const;
#ifndef NDEBUG
void formatForDebugger(char* buffer, unsigned length) const;
void showTreeForThis() const;
#endif
void setWithoutValidation(const Position&, const Position&);
private:
void validate();
void adjustForEditableContent();
Position m_base; // base position for the selection
Position m_extent; // extent position for the selection
Position m_start; // start position for the selection
Position m_end; // end position for the selection
EAffinity m_affinity; // the upstream/downstream affinity of the caret
TextGranularity m_granularity; // granularity of start/end selection
// these are cached, can be recalculated by validate()
EState m_state; // the state of the selection
bool m_baseIsFirst; // true if base is before the extent
};
inline bool operator==(const Selection& a, const Selection& b)
{
return a.start() == b.start() && a.end() == b.end() && a.affinity() == b.affinity() && a.granularity() == b.granularity();
}
inline bool operator!=(const Selection& a, const Selection& b)
{
return !(a == b);
}
} // namespace WebCore
#ifndef NDEBUG
// Outside the WebCore namespace for ease of invocation from gdb.
void showTree(const WebCore::Selection&);
void showTree(const WebCore::Selection*);
#endif
#endif // Selection_h
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