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