1/* 2 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20#ifndef SVGTextQuery_h 21#define SVGTextQuery_h 22 23#if ENABLE(SVG) 24#include "FloatRect.h" 25#include "SVGTextFragment.h" 26#include <wtf/Vector.h> 27 28namespace WebCore { 29 30class InlineFlowBox; 31class RenderObject; 32class SVGInlineTextBox; 33 34class SVGTextQuery { 35public: 36 SVGTextQuery(RenderObject*); 37 38 unsigned numberOfCharacters() const; 39 float textLength() const; 40 float subStringLength(unsigned startPosition, unsigned length) const; 41 FloatPoint startPositionOfCharacter(unsigned position) const; 42 FloatPoint endPositionOfCharacter(unsigned position) const; 43 float rotationOfCharacter(unsigned position) const; 44 FloatRect extentOfCharacter(unsigned position) const; 45 int characterNumberAtPosition(const FloatPoint&) const; 46 47 // Public helper struct. Private classes in SVGTextQuery inherit from it. 48 struct Data; 49 50private: 51 typedef bool (SVGTextQuery::*ProcessTextFragmentCallback)(Data*, const SVGTextFragment&) const; 52 bool executeQuery(Data*, ProcessTextFragmentCallback) const; 53 54 void collectTextBoxesInFlowBox(InlineFlowBox*); 55 bool mapStartEndPositionsIntoFragmentCoordinates(Data*, const SVGTextFragment&, int& startPosition, int& endPosition) const; 56 void modifyStartEndPositionsRespectingLigatures(Data*, int& startPosition, int& endPosition) const; 57 58private: 59 bool numberOfCharactersCallback(Data*, const SVGTextFragment&) const; 60 bool textLengthCallback(Data*, const SVGTextFragment&) const; 61 bool subStringLengthCallback(Data*, const SVGTextFragment&) const; 62 bool startPositionOfCharacterCallback(Data*, const SVGTextFragment&) const; 63 bool endPositionOfCharacterCallback(Data*, const SVGTextFragment&) const; 64 bool rotationOfCharacterCallback(Data*, const SVGTextFragment&) const; 65 bool extentOfCharacterCallback(Data*, const SVGTextFragment&) const; 66 bool characterNumberAtPositionCallback(Data*, const SVGTextFragment&) const; 67 68private: 69 Vector<SVGInlineTextBox*> m_textBoxes; 70}; 71 72} 73 74#endif 75#endif 76