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/*
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* 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 SVGTextQuery_h
#define SVGTextQuery_h
#include "FloatRect.h"
#include "SVGPoint.h"
#include "SVGTextFragment.h"
#include <wtf/Vector.h>
namespace WebCore {
class InlineFlowBox;
class RenderObject;
class SVGInlineTextBox;
class SVGTextQuery {
public:
SVGTextQuery(RenderObject*);
unsigned numberOfCharacters() const;
float textLength() const;
float subStringLength(unsigned startPosition, unsigned length) const;
SVGPoint startPositionOfCharacter(unsigned position) const;
SVGPoint endPositionOfCharacter(unsigned position) const;
float rotationOfCharacter(unsigned position) const;
FloatRect extentOfCharacter(unsigned position) const;
int characterNumberAtPosition(const SVGPoint&) const;
// Public helper struct. Private classes in SVGTextQuery inherit from it.
struct Data;
private:
typedef bool (SVGTextQuery::*ProcessTextFragmentCallback)(Data*, const SVGTextFragment&) const;
bool executeQuery(Data*, ProcessTextFragmentCallback) const;
void collectTextBoxesInFlowBox(InlineFlowBox*);
bool mapStartEndPositionsIntoFragmentCoordinates(Data*, const SVGTextFragment&, int& startPosition, int& endPosition) const;
void modifyStartEndPositionsRespectingLigatures(Data*, int& startPosition, int& endPosition) const;
private:
bool numberOfCharactersCallback(Data*, const SVGTextFragment&) const;
bool textLengthCallback(Data*, const SVGTextFragment&) const;
bool subStringLengthCallback(Data*, const SVGTextFragment&) const;
bool startPositionOfCharacterCallback(Data*, const SVGTextFragment&) const;
bool endPositionOfCharacterCallback(Data*, const SVGTextFragment&) const;
bool rotationOfCharacterCallback(Data*, const SVGTextFragment&) const;
bool extentOfCharacterCallback(Data*, const SVGTextFragment&) const;
bool characterNumberAtPositionCallback(Data*, const SVGTextFragment&) const;
private:
Vector<SVGInlineTextBox*> m_textBoxes;
};
}
#endif
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