1 /* 2 * Copyright (C) 2012 Apple Inc. All rights reserved. 3 * Copyright (C) Research In Motion Limited 2011. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 * 20 */ 21 22 #ifndef Latin1TextIterator_h 23 #define Latin1TextIterator_h 24 25 #include "wtf/text/WTFString.h" 26 27 namespace WebCore { 28 29 class Latin1TextIterator { 30 public: 31 // The passed in LChar pointer starts at 'currentCharacter'. The iterator operates on the range [currentCharacter, lastCharacter]. 32 // 'endCharacter' denotes the maximum length of the UChar array, which might exceed 'lastCharacter'. Latin1TextIterator(const LChar * characters,int currentCharacter,int lastCharacter,int)33 Latin1TextIterator(const LChar* characters, int currentCharacter, int lastCharacter, int /*endCharacter*/) 34 : m_characters(characters) 35 , m_currentCharacter(currentCharacter) 36 , m_lastCharacter(lastCharacter) 37 { 38 } 39 consume(UChar32 & character,unsigned & clusterLength)40 bool consume(UChar32& character, unsigned& clusterLength) 41 { 42 if (m_currentCharacter >= m_lastCharacter) 43 return false; 44 45 character = *m_characters; 46 clusterLength = 1; 47 return true; 48 } 49 advance(unsigned advanceLength)50 void advance(unsigned advanceLength) 51 { 52 m_characters += advanceLength; 53 m_currentCharacter += advanceLength; 54 } 55 currentCharacter()56 int currentCharacter() const { return m_currentCharacter; } characters()57 const LChar* characters() const { return m_characters; } 58 59 private: 60 const LChar* m_characters; 61 int m_currentCharacter; 62 int m_lastCharacter; 63 }; 64 65 } 66 67 #endif 68