using System;
using System.Collections;
using System.Text;
using System.IO;
using System.Collections.Specialized;
using System.Text.RegularExpressions;
using System.Diagnostics;

namespace CSS
{
public class App
{
public static void Main(string[] args)
{
//初始化CSS解析器
CssDocument doc = new CssDocument();
//加载现有CSS文件
doc.Load(Directory.GetCurrentDirectory() + "/test.css");
//修改CSS
doc["body"].Attributes["font-size"] = "12px";
//保存CSS文件
doc.Save(Directory.GetCurrentDirectory() + "/a.css");
Console.Read();
}
}

public class CssParse
{
private string m_source;
private int m_idx;


public static bool IsWhiteSpace(char ch)
{
return( "tnr ".IndexOf(ch) != -1 );
}

public void EatWhiteSpace()
{
while ( !Eof() )
{
if ( !IsWhiteSpace(GetCurrentChar()) )
return;
m_idx++;
}
}

public bool Eof()
{
return(m_idx>=m_source.Length );
}

public string ParseElementName()
{
StringBuilder element = new StringBuilder();
EatWhiteSpace();
while ( !Eof() )
{
if (GetCurrentChar()=='{')
{
m_idx++;
break;
}
element.Append(GetCurrentChar());
m_idx++;
}

EatWhiteSpace();
return element.ToString().Trim();
}

public string ParseAttributeName()
{
StringBuilder attribute = new StringBuilder();
EatWhiteSpace();

while ( !Eof() )
{
if (GetCurrentChar()==':')
{
m_idx++;
break;
}
attribute.Append(GetCurrentChar());
m_idx++;
}

EatWhiteSpace();
return attribute.ToString().Trim();
}

public string ParseAttributeValue()
{
StringBuilder attribute = new StringBuilder();
EatWhiteSpace();
while ( !Eof() )
{
if (GetCurrentChar()==';')
{
m_idx++;
break;
}
attribute.Append(GetCurrentChar());
m_idx++;
}

EatWhiteSpace();
return attribute.ToString().Trim();
}

public char GetCurrentChar()
{
return GetCurrentChar(0);
}

public char GetCurrentChar(int peek)
{
if( (m_idx+peek)