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 #include "core/rendering/svg/SVGTextFragment.h" 24 #include "core/svg/SVGPoint.h" 25 #include "core/svg/SVGRect.h" 26 #include "wtf/Vector.h" 27 28 namespace WebCore { 29 30 class InlineFlowBox; 31 class RenderObject; 32 class SVGInlineTextBox; 33 34 class SVGTextQuery { 35 public: 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 SVGRect extentOfCharacter(unsigned position) const; 45 int characterNumberAtPosition(const SVGPoint&) const; 46 47 // Public helper struct. Private classes in SVGTextQuery inherit from it. 48 struct Data; 49 50 private: 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 58 private: 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 68 private: 69 Vector<SVGInlineTextBox*> m_textBoxes; 70 }; 71 72 } 73 74 #endif 75
