XML Visualizer v.2

// Xml Visualizer v.2
// by Lars Hove Christiansen (larshove@gmail.com)
// http://www.codeplex.com/XmlVisualizer

using System;
using System.Windows.Forms;
using ICSharpCode.TextEditor;
using ICSharpCode.TextEditor.Document;

namespace XmlVisualizer
{
	internal partial class EditorUserControl : UserControl
	{
		public delegate void CaretChangeEventHandler(int line, int column);
		public event CaretChangeEventHandler CaretChangeEvent;

		private bool textChanged;

		public EditorUserControl()
		{
			InitializeComponent();

			textEditorControl.TabIndent = 3;
			textEditorControl.Document.HighlightingStrategy = HighlightingManager.Manager.FindHighlighter("XML");

			textEditorControl.ActiveTextAreaControl.Caret.PositionChanged += Caret_PositionChanged;
			textEditorControl.Document.DocumentChanged += Document_DocumentChanged;
		}

		private void Caret_PositionChanged(object sender, EventArgs e)
		{
			int line = textEditorControl.ActiveTextAreaControl.Caret.Line + 1;
			int column = textEditorControl.ActiveTextAreaControl.Caret.Column + 1;

			if (CaretChangeEvent != null)
			{
				CaretChangeEvent(line, column);
			}
		}

		private void Document_DocumentChanged(object sender, DocumentEventArgs e)
		{
			textChanged = true;
		}

		public string GetText()
		{
			return textEditorControl.Text;
		}

		public void SetText(string text)
		{
			bool modified = ChangesInEditor;
			textEditorControl.Text = text;
			textEditorControl.Refresh();
			ChangesInEditor = modified;
		}

		public void SetFocus()
		{
			textEditorControl.Focus();
		}

		public int GetActiveLineNumber()
		{
			return textEditorControl.ActiveTextAreaControl.Caret.Line;
		}

		public int GetActiveColumnNumber()
		{
			return textEditorControl.ActiveTextAreaControl.Caret.Column;
		}

		public void GotoLine(int line, int column)
		{
			textEditorControl.ActiveTextAreaControl.Caret.Line = line - 1;
			textEditorControl.ActiveTextAreaControl.Caret.Column = column - 1;
			textEditorControl.ActiveTextAreaControl.CenterViewOn(line - 1, 0);
			textEditorControl.Focus();
		}

		public bool ChangesInEditor
		{
			get
			{
				return textChanged;
			}
			set
			{
				textChanged = value;
			}
		}

		private void toolStripMenuItemRedo_Click(object sender, EventArgs e)
		{
			textEditorControl.Redo();
		}

		private void toolStripMenuItemUndo_Click(object sender, EventArgs e)
		{
			textEditorControl.Undo();
		}

		private void contextMenuStrip_Opening(object sender, System.ComponentModel.CancelEventArgs e)
		{
			if (textEditorControl.Document.UndoStack.CanUndo)
			{
				toolStripMenuItemUndo.Enabled = true;
			}
			else
			{
				toolStripMenuItemUndo.Enabled = false;
			}

			if (textEditorControl.Document.UndoStack.CanRedo)
			{
				toolStripMenuItemRedo.Enabled = true;
			}
			else
			{
				toolStripMenuItemRedo.Enabled = false;
			}
		}

		private void toolStripMenuItemCut_Click(object sender, EventArgs e)
		{
			textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.Cut(sender, e);
		}

		private void toolStripMenuItemCopy_Click(object sender, EventArgs e)
		{
			textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.Copy(sender, e);
		}

		private void toolStripMenuItemPaste_Click(object sender, EventArgs e)
		{
			textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.Paste(sender, e);
		}

		private void toolStripMenuItemSelectAll_Click(object sender, EventArgs e)
		{
			SelectAll();
		}

		protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
		{
			if (textEditorControl.ActiveTextAreaControl.TextArea.Focused)
			{
				if ((int)keyData == 131137) // Keys.Control && keyData == Keys.A
				{
					SelectAll();
					return true;
				}
			}

			return base.ProcessCmdKey(ref msg, keyData);
		}

		private void SelectAll()
		{
			TextLocation startPosition = new TextLocation(0, 0);

			int textLength = textEditorControl.ActiveTextAreaControl.Document.TextLength;
			TextLocation endPosition = new TextLocation();
			endPosition.Column = textEditorControl.Document.OffsetToPosition(textLength).Column;
			endPosition.Line = textEditorControl.Document.OffsetToPosition(textLength).Line;

			textEditorControl.ActiveTextAreaControl.SelectionManager.SetSelection(startPosition, endPosition);
			textEditorControl.ActiveTextAreaControl.Caret.Position = endPosition;
		}

		private void toolStripMenuItemDelete_Click(object sender, EventArgs e)
		{
			textEditorControl.ActiveTextAreaControl.TextArea.ClipboardHandler.Delete(sender, e);
		}

		public void Search(string searchText)
		{
			if (searchText.Trim().Trim().Length == 0)
			{
				return;
			}

			int startIndex = textEditorControl.ActiveTextAreaControl.Caret.Offset;

			if (startIndex > textEditorControl.Document.TextContent.ToLower().LastIndexOf(searchText.ToLower()))
			{
				startIndex = 0;
			}

			int offset = textEditorControl.Document.TextContent.ToLower().IndexOf(searchText.ToLower(), startIndex);

			if (offset >= 0)
			{
				TextLocation startPosition = textEditorControl.Document.OffsetToPosition(offset);
				TextLocation endPosition = textEditorControl.Document.OffsetToPosition(offset + searchText.Length);

				textEditorControl.ActiveTextAreaControl.SelectionManager.SetSelection(startPosition, endPosition);

				GotoLine(textEditorControl.Document.GetLineNumberForOffset(offset) + 1, startPosition.Column + searchText.Length + 1);
			}
			else
			{
				Util.ShowMessage(string.Format("'{0}' not found.", searchText));
			}
		}
	}
}