XMLNotepad.cs

 using System; 
 using System.Drawing; 
 using System.Windows.Forms; 
 using NUnit.Framework; 
 using System.Collections; 
 using System.Text.RegularExpressions; 
 namespace Notepad 
 { 
 class XMLNotepad : NotepadCloneNoMenu 
 { 
 private TextModel model; 
 
 static void Main(string[] args) 
 { 
 Application.Run(new XMLNotepad()); 
 } 
 public XMLNotepad() { 
 Text = "XML Notepad"; 
 textbox.KeyDown += new KeyEventHandler(XMLKeyDownHandler); 
 textbox.KeyPress += new KeyPressEventHandler(XMLKeyPressHandler); 
 model = new TextModel(); 
 } 
 private void InitializeComponent() { 
 this.SuspendLayout(); 
 // 
 // textbox 
 // 
 this.textbox.Visible = true; 
 // 
 // XMLNotepad 
 // 
 this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); 
 this.ClientSize = new System.Drawing.Size(292, 266); 
 this.Controls.AddRange(new System.Windows.Forms.Control[] { 
 this.textbox}); 
 this.Name = "XMLNotepad"; 
 this.ResumeLayout(false); 
 } 
 void XMLKeyPressHandler(object objSender, KeyPressEventArgs kea) { 
 if ((int) kea.KeyChar == (int) Keys.Enter) { 
 kea.Handled = true; 
 // this code is here to avoid putting extra enters in the window. 
 // if removed, when you hit enter, the new <P> line breaks in two: 
 // <P> 
 // </P>  like that. 
 } 
 } 
 void XMLKeyDownHandler(object objSender, KeyEventArgs kea) { 
 model.SetLines(textbox.Lines); 
 model.SelectionStart = textbox.SelectionStart; 
 if (kea.KeyCode == Keys.Enter) { 
 model.Enter(); 
 kea.Handled = true; 
 } 
 PutText(textbox, model.LinesArray(), model.SelectionStart);     } 
 public void PutText(ITestTextBox textbox, string[] lines, 
 int selectionStart) { 
 // this is Feature Envy big time. 
 textbox.Lines = lines; 
 textbox.SelectionStart = selectionStart; 
 textbox.ScrollToCaret(); 
 } 
 } 
 }