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GeShi Code Highlighting

• supports over 60 languages
• supports line numbering
• supports highlighting important lines
• hyperlinks to keywords (need more definition in csharp, i'm working on it)

public static void TestMethod()

<?php
include('geshi.php');
 
if ( get_magic_quotes_gpc() ) $_POST['source'] = stripslashes($_POST['source']);
$source = $_POST['source'];
$language = $_POST['language'];
$numbers = $_POST['numbers'];
$style = $_POST['style'];
$path = 'geshi/';
 
$geshi = new GeSHi($source, $language, $path);
##$geshi->set_overall_style('background-color: ' + backcolor, true); ##ffffee;', true); //to match my wiki
$geshi->set_overall_style($style, true);
$geshi->enable_line_numbers($numbers);
echo $geshi->parse_code();
 
#reset everything
$geshi->set_overall_style("", true);
$geshi->enable_line_numbers(0);
 
 
?>

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using ScrewTurn.Wiki.PluginFramework;
using System.Web;
using System.Net;
using System.IO;
 
namespace Aspiring.ScrewTurnWiki.Geshi
{
    public class GeshiFormatProvider : IFormatterProvider {
    
	    private IHost host;
	    private string config;
	    private ComponentInformation info = new ComponentInformation("Geshi Code Formatting Plugin 1.0", "Aspiring Technology", "http://hookedonlinq.com/");
 
	    public bool PerformPhase1 {
		    get { return true; }
	    }
 
	    public bool PerformPhase2 {
		    get { return false; }
	    }
 
	    public bool PerformPhase3 {
		    get { return false; }
	    }
 
	    public string Format(string raw, ContextInformation context, FormattingPhase phase) {
		    
            // change these to suit your system
            const string geshiUrl = @"http://-yourwiki.com-/geshi/getgeshi.php";
            const int tailLength = 7; 
            const int headLength = 5; 
            string language = "csharp";
            string style = "";
            string lineNumbers = "0";
		    
   	    string head = @"\<" + "code" + @".*?\>";
            string tail = @"\<\/" + "code" + @"\>";
	    Regex regex = new Regex(head + ".+?" + tail, RegexOptions.IgnoreCase | RegexOptions.Singleline);
 
            Match match = regex.Match(raw);
            while (match.Success) {
                // remove the tail
                string code = match.Value.Substring(0, match.Value.Length - tailLength);
 
                // remove the header and extract the arguments
                int headEnd = code.IndexOf('>');
                string[] args = code.Substring(headLength, headEnd - headLength).Trim().Split(' ');
                foreach (string s in args) {
                    if (s != string.Empty) {
                        string[] thisArg = s.Split('=');
                        if (thisArg.Length == 2) {
                            switch (thisArg[0].ToLower()) {
                                case "lang" :
                                case "language" :language = thisArg[1].Trim(); break;
                                case "numbers" : lineNumbers = thisArg[1].Trim(); break;
                                case "style" : style = thisArg[1].Trim(); break;
                            }
                        }
                    }
                }
                code = code.Substring(headEnd+1);
                
                // format the code
                raw = raw.Replace(match.Value, GetGeshiCode(context, geshiUrl, code, language, lineNumbers, style));
                match = regex.Match(raw);
            }
 
            return raw;
	}
 
	public void Init(IHost host, string config) {
		    this.host = host;
		    this.config = config;
	}
 
	public void Shutdown() { }
 
	public ComponentInformation Information {
	    get { return info; }
	}
 
        public string GetGeshiCode(ContextInformation context, string geshiUrl, string source, string language, string lineNumbers, string style)
        {
            string result = source;
 
            if (string.IsNullOrEmpty(geshiUrl)) return result;
            if (string.IsNullOrEmpty(source)) return string.Empty;
 
            HttpWebRequest  request = (HttpWebRequest)WebRequest.Create(geshiUrl);
            try {
                byte[] postDataBytes = Encoding.UTF8.GetBytes("source=" + HttpUtility.UrlEncode(source) + 
                                                              "&language=" + HttpUtility.UrlEncode(language) +
                                                              "&numbers=" + HttpUtility.UrlEncode(lineNumbers) +
                                                              "&style=" + HttpUtility.UrlEncode(style));
                
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = postDataBytes.Length;
                Stream requestStream = request.GetRequestStream();
                requestStream.Write(postDataBytes, 0 ,postDataBytes.Length);
                requestStream.Close();
 
                // get response and write to console
                HttpWebResponse resp = (HttpWebResponse)request.GetResponse();
                try {
                    StreamReader responseReader =  new StreamReader(resp.GetResponseStream(), Encoding.UTF8);
                    result = responseReader.ReadToEnd();
                }
                finally {
                    resp.Close(); 
                }
            }
            catch (Exception e){
                // If something goes wrong, we should log an error.
                // This will be system specific.
                host.LogEntry( String.Format("Failed Geshi Code Formatting for page {0} - {1}", context.Page.Name, e.Message), LogEntryType.Error, this);
            }
 
            return result;
        }
    }
}