71 lines
2.8 KiB
C++
71 lines
2.8 KiB
C++
/*
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* Copyright (C) Research In Motion Limited 2010. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#pragma once
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#include "FloatRect.h"
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#include "SVGTextFragment.h"
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#include <wtf/Vector.h>
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namespace WebCore {
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class LegacyInlineFlowBox;
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class RenderObject;
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class SVGInlineTextBox;
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class SVGTextQuery {
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public:
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SVGTextQuery(RenderObject*);
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unsigned numberOfCharacters() const;
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float textLength() const;
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float subStringLength(unsigned startPosition, unsigned length) const;
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FloatPoint startPositionOfCharacter(unsigned position) const;
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FloatPoint endPositionOfCharacter(unsigned position) const;
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float rotationOfCharacter(unsigned position) const;
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FloatRect extentOfCharacter(unsigned position) const;
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int characterNumberAtPosition(const FloatPoint&) const;
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// Public helper struct. Private classes in SVGTextQuery inherit from it.
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struct Data;
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private:
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typedef bool (SVGTextQuery::*ProcessTextFragmentCallback)(Data*, const SVGTextFragment&) const;
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bool executeQuery(Data*, ProcessTextFragmentCallback) const;
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void collectTextBoxesInFlowBox(LegacyInlineFlowBox*);
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bool mapStartEndPositionsIntoFragmentCoordinates(Data*, const SVGTextFragment&, unsigned& startPosition, unsigned& endPosition) const;
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void modifyStartEndPositionsRespectingLigatures(Data*, unsigned& startPosition, unsigned& endPosition) const;
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private:
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bool numberOfCharactersCallback(Data*, const SVGTextFragment&) const;
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bool textLengthCallback(Data*, const SVGTextFragment&) const;
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bool subStringLengthCallback(Data*, const SVGTextFragment&) const;
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bool startPositionOfCharacterCallback(Data*, const SVGTextFragment&) const;
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bool endPositionOfCharacterCallback(Data*, const SVGTextFragment&) const;
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bool rotationOfCharacterCallback(Data*, const SVGTextFragment&) const;
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bool extentOfCharacterCallback(Data*, const SVGTextFragment&) const;
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bool characterNumberAtPositionCallback(Data*, const SVGTextFragment&) const;
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private:
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Vector<SVGInlineTextBox*> m_textBoxes;
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};
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} // namespace WebCore
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