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Diffstat (limited to 'quanta/components/csseditor/stylesheetparser.cpp')
| -rw-r--r-- | quanta/components/csseditor/stylesheetparser.cpp | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/quanta/components/csseditor/stylesheetparser.cpp b/quanta/components/csseditor/stylesheetparser.cpp new file mode 100644 index 00000000..b8cbf306 --- /dev/null +++ b/quanta/components/csseditor/stylesheetparser.cpp @@ -0,0 +1,245 @@ +/*************************************************************************** + stylesheetparser.cpp - description + ------------------- + begin : gio ago 19 2004 + copyright : (C) 2004 by gulmini luciano + email : gulmini.luciano@student.unife.it + ***************************************************************************/ + +/*************************************************************************** + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + ***************************************************************************/ + +#include "stylesheetparser.h" +#include <klocale.h> +#include <kdebug.h> + +static const QString msg1(i18n("has not been closed")), + msg2(i18n("needs an opening parenthesis ")); + +stylesheetParser::stylesheetParser(const QString& s){ + m_styleSheet = s; + m_styleSheet=m_styleSheet.right(m_styleSheet.length()-whiteSpaces(0)); + m_stopProcessing = false; + m_orderNumber = 0; +} + +int stylesheetParser::whiteSpaces(int d){ + int ws=0; + for( unsigned int i=d;i<m_styleSheet.length();i++){ + QString temp; + if(m_styleSheet[i] == ' ' || m_styleSheet[i] == '\n' || m_styleSheet[i] == '\t' ) + ws++; + else break; + } + return ws; +} + +void stylesheetParser::parse(){ + if(!m_stopProcessing){ + if(!m_styleSheet.isEmpty()){ + if(m_styleSheet.startsWith("/*")) + parseComment(); + else if(m_styleSheet.startsWith("@page")) + parseAtRules1(); + else if(m_styleSheet.startsWith("@media")) + parseAtRules1(); + else if(m_styleSheet.startsWith("@import")) + parseAtRules2(); + else if(m_styleSheet.startsWith("@charset")) + parseAtRules2(); + else parseSelector(); + } + else return; + } +} + +void stylesheetParser::parseComment(){ + bool stopProcessingComment=false; + unsigned int k; + for(k=2;k<m_styleSheet.length()-1;k++){ + QString temp; + temp.append(m_styleSheet[k]).append(m_styleSheet[k+1]); + if(temp=="*/") { + k+=2; + stopProcessingComment=true; + break; + } + } + + if(stopProcessingComment){ + int ws=whiteSpaces(k); + QPair<QString,unsigned int> tmp(m_styleSheet.left(k+ws),++m_orderNumber); + m_stylesheetStructure["/*"+QString::number(m_orderNumber,10)]=tmp; + m_styleSheet=m_styleSheet.right(m_styleSheet.length()-k-ws); + parse(); + } + + else { + m_stopProcessing = true; + emit errorOccurred(i18n("The comment") + " :\n" +m_styleSheet.mid(0,20) + "...\n "+ msg1); + return; + } +} + +unsigned int stylesheetParser::numberOfParenthesisInAParenthesisBlock(parenthesisKind p, const QString& b){ + QChar searchFor = '{'; + if (p == closed) + searchFor = '}'; + int num = 0; + int len = b.length(); + bool ignore = false; + for (int i = 0; i < len; i++) + { + if (b[i] == '/' && (i + 1 < len) && b[i + 1] == '*') + ignore = true; + if (b[i] == '*' && (i + 1 < len) && b[i + 1] == '/') + ignore = false; + if (!ignore && b[i] == searchFor) + num++; + } + return num; +} + +int findParanthesis(const QString& string, const QChar &ch, int startPos = 0) +{ + int pos = -1; + int len = string.length(); + bool ignore = false; + for (int i = startPos; i < len; i++) + { + if (string[i] == '/' && (i + 1 < len) && string[i + 1] == '*') + ignore = true; + if (string[i] == '*' && (i + 1 < len) && string[i + 1] == '/') + ignore = false; + if (!ignore && string[i] == ch) + { + pos = i; + break; + } + } + return pos; +} + +void stylesheetParser::parseSelector(){ + int closingParenthesisPos = findParanthesis(m_styleSheet, '}'); + if(closingParenthesisPos==-1) { + m_stopProcessing = true; + emit errorOccurred(i18n("The selector") + " :\n" +m_styleSheet.mid(0,20) + "...\n "+ msg1); + return; + } + + QString temp(m_styleSheet.left(closingParenthesisPos+1)); + + if(numberOfParenthesisInAParenthesisBlock(closed,temp) < numberOfParenthesisInAParenthesisBlock(opened,temp)){ + m_stopProcessing = true; + emit errorOccurred(i18n("The selector") + " :\n" +m_styleSheet.mid(0,20) + "...\n "+ msg1); + return; + } + + if(numberOfParenthesisInAParenthesisBlock(closed,temp) > numberOfParenthesisInAParenthesisBlock(opened,temp)){ + m_stopProcessing = true; + emit errorOccurred(i18n("The selector") + " :\n" +m_styleSheet.mid(0,20) + "...\n "+ msg2); + return; + } + + int closingParentheses = 1, + openingParentheses = 0; + while(true){ + openingParentheses = numberOfParenthesisInAParenthesisBlock(closed,m_styleSheet.left(closingParenthesisPos+1)); //m_styleSheet.left(closingParenthesisPos+1).contains("{"); + + if(openingParentheses==closingParentheses){ + QString selectorName=m_styleSheet.left(findParanthesis(m_styleSheet, '{')/*m_styleSheet.find("{")*/).stripWhiteSpace(), + selectorValue=m_styleSheet.mid(findParanthesis(m_styleSheet, '{')/*m_styleSheet.find("{")*/+1, closingParenthesisPos - m_styleSheet.find("{") -1); + + selectorName.remove("\n").remove("\t"); + selectorValue.remove("\n").remove("\t"); + QPair<QString,unsigned int> tmp(selectorValue,++m_orderNumber); + + if (m_stylesheetStructure.contains(selectorName)) + { + uint i = 2; + QString s = selectorName + QString("-v%1").arg(i); + while (m_stylesheetStructure.contains(s)) + { + i++; + s = selectorName + QString("-v%1").arg(i); + } + selectorName = s; + } + m_stylesheetStructure[selectorName]=tmp; + break; + } + else { + closingParenthesisPos = findParanthesis(m_styleSheet, '{',closingParenthesisPos+1)/*m_styleSheet.find("}",closingParenthesisPos+1)*/; + closingParentheses++; + } + } + + int ws=whiteSpaces(closingParenthesisPos+1); + m_styleSheet=m_styleSheet.right(m_styleSheet.length()-closingParenthesisPos-1-ws); + parse(); +} + +void stylesheetParser::parseAtRules1(){ +//TODO this needs to be fixed : in case the at rule is not properly closed the parser hangs + if(m_styleSheet.find("{") == -1) { + m_stopProcessing = true; + emit errorOccurred(m_styleSheet.mid(0,20) + "...\n " + msg2); + return; + } + + int closingParenthesisPos = m_styleSheet.find("}"), + closingParentheses = 0; + + if(closingParenthesisPos==-1) return; + else closingParentheses = 1; + + int openingParentheses=0; + while(true){ + openingParentheses = m_styleSheet.left(closingParenthesisPos+1).contains("{"); + + if(openingParentheses==closingParentheses) + break; + else { + closingParenthesisPos = m_styleSheet.find("}",closingParenthesisPos+1); + if( closingParenthesisPos!= -1 ) + closingParentheses++; + else { + m_stopProcessing = true; + emit errorOccurred(m_styleSheet.mid(0,20) + "...\n " + msg1); + return; + } + } + } + + int ws=whiteSpaces(closingParenthesisPos+1); + QPair<QString,unsigned int> tmp(m_styleSheet.left(closingParenthesisPos+1+ws),++m_orderNumber); + m_stylesheetStructure["@rule"+QString::number(m_orderNumber,10)]=tmp; + m_styleSheet=m_styleSheet.right(m_styleSheet.length()-closingParenthesisPos-1-ws); + parse(); +} + +void stylesheetParser::parseAtRules2(){ +//TODO this needs to be fixed : in case the at rule is not properly closed the parser hangs + int semicolonPos = m_styleSheet.find(";"); + + if(semicolonPos==-1) { + m_stopProcessing = true; + emit errorOccurred(m_styleSheet.mid(0,20) + "...\n " + msg1); + return; + } + + int ws=whiteSpaces(semicolonPos+1); + QPair<QString,unsigned int> tmp(m_styleSheet.left(semicolonPos+1+ws),++m_orderNumber); + m_stylesheetStructure["@rule"+QString::number(m_orderNumber,10)]=tmp; + m_styleSheet=m_styleSheet.right(m_styleSheet.length()-semicolonPos-1-ws); + parse(); +} + +#include "stylesheetparser.moc" |