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| using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections;
using System.Drawing;
namespace Highlighting
{
public class HighlightingTextBox : RichTextBox
{
private ArrayList HighlightDescriptors;
private ArrayList Separators;
private TableGenerator generator;
public HighlightingTextBox() : base()
{
this.HighlightDescriptors = new ArrayList();
this.Separators = new ArrayList();
generator = new TableGenerator(Color.Blue, Font);
}
public void AddSeparator(char c)
{
AddSeparator("" + c);
}
public void AddSeparator(string s)
{
Separators.Add(s);
}
protected override void OnTextChanged(EventArgs e)
{
base.OnTextChanged(e);
Highlight();
}
public void Highlight()
{
//@"{\rtf1\ansi\ansicpg1255\deff0\deflang1037"
string rtf = "";
SetDefaultSettings(ref rtf);
rtf += " ";
string[] lines = Text.Replace("\\", "\\\\").Replace("{", "\\{").Replace("}", "\\}").Split('\n');
for (int index = 0; index < lines.Length; index++)
{
//if (index != 0) rtf += "\\par\n";
string line = lines[index];
string[] tokens = line.Split((string[])Separators.ToArray(typeof(string)), StringSplitOptions.None);
if (tokens.Length == 0)
{
rtf += lines[index];
continue;
}
int tokenCount = 0;
for (int i = 0; i < line.Length; )
{
char curChar = line[i];
if (isSeparator(line,i)!=0)
{
int sp = isSeparator(line, i);
rtf += line.Substring(i, sp);
i += sp;
continue;
}
if (tokenCount >= tokens.Length) break;
string curToken = tokens[tokenCount];
tokenCount++;
bool isAdded = false;
foreach (HighlightDescriptor h in HighlightDescriptors)
{
if (Match(h, curToken))
{
isAdded = true;
SetDescriptorSettings(ref rtf, h);
switch (h.DescriptorType)
{
case DescriptorType.Word:
rtf += line.Substring(i,curToken.Length);
i += curToken.Length;
break;
case DescriptorType.ToEOL:
rtf += GetWordBounsOnCharIndex(line, i, out i);
break;
case DescriptorType.ToEOW:
rtf += line.Substring(i, line.Length);
i = line.Length;
break;
case DescriptorType.ToCloseToken:
int start = i+h.CloseToken.Length;
while (line.IndexOf(h.CloseToken, start) == -1 && index < lines.Length)
{
rtf += line.Remove(0, i);
index++;
if (index < lines.Length)
{
rtf += "\\par\n";
line = lines[index];
i = start = 0;
}
else
{
i = start = line.Length;
}
}
int idx = line.IndexOf(h.CloseToken, start);
if (idx != -1)
{
rtf += line.Substring(i, idx + h.CloseToken.Length);
line = line.Remove(0, idx + h.CloseToken.Length);
tokenCount = 0;
tokens = line.Split((string[])Separators.ToArray(typeof(string)), StringSplitOptions.None);
i = 0;
}
break;
}
SetDefaultSettings(ref rtf);
}
}
if (!isAdded)
{
rtf += line.Substring(i, curToken.Length);
i += curToken.Length;
}
}
rtf += "\\par\n";
}
rtf=@"{\rtf1\ansi\ansicpg1255\deff0\deflang1037" + generator.GenerateTables() + "\n"+@"\viewkind4\uc1\pard" + rtf + "}";
Rtf = rtf;
}
private string GetWordBounsOnCharIndex(string sText, int pCharIndex, out int curTokenEndIndex)
{
int curTokenStartIndex = LastIndexOfAny(sText,(string[])Separators.ToArray(), Math.Min(pCharIndex, sText.Length - 1)) + 1;
//Now that we know where it starts, where does it end
curTokenEndIndex = IndexOfAny(sText, (string[])Separators.ToArray(), curTokenStartIndex);
//No end found, select all
if (curTokenEndIndex == -1)
curTokenEndIndex = sText.Length;
//now determin the selected word or token
return sText.Substring(curTokenStartIndex, Math.Max(curTokenEndIndex - curTokenStartIndex, 0)).ToUpper();
}
private int IndexOfAny(string text, string[] separators, int startIndex)
{
foreach (string sep in separators)
{
int offset = 0;
for (int i = startIndex; i <text.Length; i++)
{
if (text[i] == sep[offset])
{
offset++;
if (offset >= sep.Length)
{
return i;
}
}
else
offset = 0;
}
}
return -1;
}
private int LastIndexOfAny(string text, string[] separators, int startIndex)
{
foreach (string sep in separators)
{
int offset = 0;
for (int i = text.Length; i >= startIndex; i--)
{
if (text[i] == sep[sep.Length - offset])
{
offset++;
if (offset >= sep.Length)
{
return i;
}
}
else
offset = 0;
}
}
return -1;
}
private int isSeparator(string line, int index)
{
for (int i = 0; i < Separators.Count; i++)
{
string sep = (string)Separators[i];
if (line.Length <= index + sep.Length)
{
if (line.Substring(index , sep.Length) == sep)
{
return sep.Length;
}
}
}
return 0;
}
private bool Match(HighlightDescriptor h, string token)
{
switch (h.DescriptorRecognition)
{
case DescriptorRecognition.WholeWord:
if (token == h.Token)
{
return true;
}
return false;
case DescriptorRecognition.StartsWith:
if (token.StartsWith(h.Token))
{
return true;
}
return false;
case DescriptorRecognition.Contains:
if (token.Contains(h.Token))
{
return true;
}
return false;
default: return false;
}
}
private void SetDescriptorSettings(ref string str, HighlightDescriptor h)
{
SetColor(ref str, h.Color);
SetFont(ref str, h.Font);
SetFontSize(ref str, h.Font);
str += " ";
}
private void SetDefaultSettings(ref string str)
{
SetColor(ref str, Color.Blue);
SetFont(ref str, Font);
SetFontSize(ref str, Font);
str += " ";
}
private void SetColor(ref string rtf,Color c)
{
rtf += @"\cf" + generator.AddColor(c);
}
private void SetFont(ref string rtf, Font f)
{
rtf += @"\f" + generator.AddFont(f);
if (f.Bold)
rtf += @"\b";
if (f.Italic)
rtf += @"\i";
}
private void SetFontSize(ref string rtf, Font f)
{
rtf += @"\fs" + Math.Round((f.Size * 2));
}
}
} |
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