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/***************************************************************************
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"
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