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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Windows.Forms;
using System.ComponentModel;
using System.Text.RegularExpressions;
using System.Drawing;
namespace SyntaxHighlighter
{
public class SyntaxRichTextBox : System.Windows.Forms.RichTextBox
{
private SyntaxSettings m_settings = new SyntaxSettings();
private static bool m_bPaint = true;
private string m_strLine = "";
private int m_nContentLength = 0;
private int m_nLineLength = 0;
private int m_nLineStart = 0;
private int m_nLineEnd = 0;
private string m_strKeywords = "";
private Regex _regKeywords = null;
private Regex _regComments = null;
private Regex _regNumbers = null;
private int m_nCurSelection = 0;
/// <summary>
/// The settings.
/// </summary>
public SyntaxSettings Settings
{
get { return m_settings; }
}
/// <summary>
/// WndProc
/// </summary>
/// <param name="m"></param>
protected override void WndProc(ref System.Windows.Forms.Message m)
{
if (m.Msg == 0x00f)
{
if (m_bPaint)
base.WndProc(ref m);
else
m.Result = IntPtr.Zero;
}
else
base.WndProc(ref m);
}
/// <summary>
/// OnTextChanged
/// </summary>
/// <param name="e"></param>
protected override void OnTextChanged(EventArgs e)
{
// Calculate shit here.
m_nContentLength = this.TextLength;
int nCurrentSelectionStart = SelectionStart;
int nCurrentSelectionLength = SelectionLength;
m_bPaint = false;
// Find the start of the current line.
m_nLineStart = nCurrentSelectionStart;
while ((m_nLineStart > 0) && (Text[m_nLineStart - 1] != '\n'))
m_nLineStart--;
// Find the end of the current line.
m_nLineEnd = nCurrentSelectionStart;
while ((m_nLineEnd < Text.Length) && (Text[m_nLineEnd] != '\n'))
m_nLineEnd++;
// Calculate the length of the line.
m_nLineLength = m_nLineEnd - m_nLineStart;
// Get the current line.
m_strLine = Text.Substring(m_nLineStart, m_nLineLength);
// Process this line.
ProcessLine();
m_bPaint = true;
}
/// <summary>
/// Process a line.
/// </summary>
private void ProcessLine()
{
// Save the position and make the whole line black
int nPosition = SelectionStart;
SelectionStart = m_nLineStart;
SelectionLength = m_nLineLength;
SelectionColor = Color.Black;
// Process the keywords
ProcessRegex(_regKeywords, Settings.KeywordColor);
// Process numbers
if (Settings.EnableIntegers)
{
if (_regNumbers == null)
_regNumbers = new Regex("\\b(?:[0-9]*\\.)?[0-9]+\\b", RegexOptions.Compiled | RegexOptions.IgnoreCase);
ProcessRegex(_regNumbers, Settings.IntegerColor);
}
// Process strings
//if(Settings.EnableStrings)
// ProcessRegex("\"[^\"\\\\\\r\\n]*(?:\\\\.[^\"\\\\\\r\\n]*)*\"", Settings.StringColor);
// Process comments
if (Settings.EnableComments && !string.IsNullOrEmpty(Settings.Comment))
{
if (_regComments == null)
_regComments = new Regex(Settings.Comment + ".*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
ProcessRegex(_regComments, Settings.CommentColor);
}
SelectionStart = nPosition;
SelectionLength = 0;
SelectionColor = Color.Black;
m_nCurSelection = nPosition;
}
/// <summary>
/// Process a regular expression.
/// </summary>
/// <param name="strRegex">The regular expression.</param>
/// <param name="color">The color.</param>
private void ProcessRegex(Regex regKeywords, Color color)
{
Match regMatch;
for (regMatch = regKeywords.Match(m_strLine); regMatch.Success; regMatch = regMatch.NextMatch())
{
// Process the words
int nStart = m_nLineStart + regMatch.Index;
int nLenght = regMatch.Length;
//SelectionStart = nStart;
//SelectionLength = nLenght;
Select(nStart, nLenght);
SelectionColor = color;
}
}
/// <summary>
/// Compiles the keywords as a regular expression.
/// </summary>
public void CompileKeywords()
{
for (int i = 0; i < Settings.Keywords.Count; i++)
{
string strKeyword = Settings.Keywords[i];
if (i == Settings.Keywords.Count-1)
m_strKeywords += "\\b" + strKeyword + "\\b";
else
m_strKeywords += "\\b" + strKeyword + "\\b|";
}
_regKeywords = new Regex(m_strKeywords, RegexOptions.IgnoreCase | RegexOptions.Compiled);
}
public void ProcessAllLines()
{
m_bPaint = false;
int nStartPos = 0;
int i = 0;
string[] lines = Lines;
int nOriginalPos = SelectionStart;
while (i < lines.Length)
{
m_strLine = lines[i];
m_nLineStart = nStartPos;
m_nLineEnd = m_nLineStart + m_strLine.Length;
ProcessLine();
i++;
nStartPos += m_strLine.Length+1;
}
m_bPaint = true;
}
}
/// <summary>
/// Class to store syntax objects in.
/// </summary>
public class SyntaxList
{
public List<string> m_rgList = new List<string>();
public Color m_color = new Color();
}
/// <summary>
/// Settings for the keywords and colors.
/// </summary>
public class SyntaxSettings
{
SyntaxList m_rgKeywords = new SyntaxList();
string m_strComment = "";
Color m_colorComment = Color.Green;
Color m_colorString = Color.Gray;
Color m_colorInteger = Color.Red;
bool m_bEnableComments = true;
bool m_bEnableIntegers = true;
bool m_bEnableStrings = true;
#region Properties
/// <summary>
/// A list containing all keywords.
/// </summary>
public List<string> Keywords
{
get { return m_rgKeywords.m_rgList; }
}
/// <summary>
/// The color of keywords.
/// </summary>
public Color KeywordColor
{
get { return m_rgKeywords.m_color; }
set { m_rgKeywords.m_color = value; }
}
/// <summary>
/// A string containing the comment identifier.
/// </summary>
public string Comment
{
get { return m_strComment; }
set { m_strComment = value; }
}
/// <summary>
/// The color of comments.
/// </summary>
public Color CommentColor
{
get { return m_colorComment; }
set { m_colorComment = value; }
}
/// <summary>
/// Enables processing of comments if set to true.
/// </summary>
public bool EnableComments
{
get { return m_bEnableComments; }
set { m_bEnableComments = value; }
}
/// <summary>
/// Enables processing of integers if set to true.
/// </summary>
public bool EnableIntegers
{
get { return m_bEnableIntegers; }
set { m_bEnableIntegers = value; }
}
/// <summary>
/// Enables processing of strings if set to true.
/// </summary>
public bool EnableStrings
{
get { return m_bEnableStrings; }
set { m_bEnableStrings = value; }
}
/// <summary>
/// The color of strings.
/// </summary>
public Color StringColor
{
get { return m_colorString; }
set { m_colorString = value; }
}
/// <summary>
/// The color of integers.
/// </summary>
public Color IntegerColor
{
get { return m_colorInteger; }
set { m_colorInteger = value; }
}
#endregion
}
}
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My name is Liron Levi and I'm developing software for fun & profit for 15 years already.