/NRefactory/ICSharpCode.NRefactory.CSharp/Refactoring/ContextAction/RemoveBraces.cs

 1// 
 2// RemoveBraces.cs
 3//  
 4// Author:
 5//       Mike Kr?ger <mkrueger@novell.com>
 6// 
 7// Copyright (c) 2011 Mike Kr?ger <mkrueger@novell.com>
 8// 
 9// Permission is hereby granted, free of charge, to any person obtaining a copy
10// of this software and associated documentation files (the "Software"), to deal
11// in the Software without restriction, including without limitation the rights
12// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13// copies of the Software, and to permit persons to whom the Software is
14// furnished to do so, subject to the following conditions:
15// 
16// The above copyright notice and this permission notice shall be included in
17// all copies or substantial portions of the Software.
18// 
19// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25// THE SOFTWARE.
26using System;
27using System.Linq;
28
29namespace ICSharpCode.NRefactory.CSharp.Refactoring
30{
31	public class RemoveBraces : IContextAction
32	{
33		public bool IsValid (RefactoringContext context)
34		{
35			return GetBlockStatement (context) != null;
36		}
37		
38		public void Run (RefactoringContext context)
39		{
40			var block = GetBlockStatement (context);
41			
42			using (var script = context.StartScript ()) {
43				script.Remove (block.LBraceToken);
44				script.Remove (block.RBraceToken);
45				script.FormatText (ctx => ctx.Unit.GetNodeAt (block.Parent.StartLocation));
46			}
47		}
48		
49		static BlockStatement GetBlockStatement (RefactoringContext context)
50		{
51			var block = context.GetNode<BlockStatement> ();
52			if (block == null || block.LBraceToken.IsNull || block.RBraceToken.IsNull)
53				return null;
54			if (!(block.Parent is Statement)) 
55				return null;
56			if (block.Statements.Count () != 1)
57				return null;
58			return block;
59		}
60	}
61}