// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)

using System;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;
using System.Windows.Input;

using Tango.Scripting.Editors.Document;
using Tango.Scripting.Editors.Editing;

namespace Tango.Scripting.Editors.Snippets
{
	sealed class SnippetInputHandler : TextAreaStackedInputHandler
	{
		readonly InsertionContext context;
		
		public SnippetInputHandler(InsertionContext context)
			: base(context.TextArea)
		{
			this.context = context;
		}
		
		public override void Attach()
		{
			base.Attach();
			
			SelectElement(FindNextEditableElement(-1, false));
		}
		
		public override void Detach()
		{
			base.Detach();
			context.Deactivate(new SnippetEventArgs(DeactivateReason.InputHandlerDetached));
		}
		
		public override void OnPreviewKeyDown(KeyEventArgs e)
		{
			base.OnPreviewKeyDown(