// 
// SplitString.cs
//  
// Author:
//       Mike Krüger <mkrueger@novell.com>
// 
// Copyright (c) 2011 Mike Krüger <mkrueger@novell.com>
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Threading;
using System.Collections.Generic;

namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
	[ContextAction("Split string literal", Description = "Splits string literal into two.")]
	public class SplitStringAction: ICodeActionProvider
	{
		public IEnumerable<CodeAction> GetActions(RefactoringContext context)
		{
			if (context.IsSomethingSelected) {
				yield break;
			}
			var pexpr = context.GetNode<PrimitiveExpression>();
			if (pexpr == null || !(pexpr.Value is string)) {
				yield break;
			}
			if (pexpr.LiteralValue.StartsWith("@", StringComparison.Ordinal)) {
				if (!(pexpr.StartLocation < new TextLocation(context.Location.Line, context.Location.Column - 2) &&
					new TextLocation(context.Location.Line, context.Location.Column + 2) < pexpr.EndLocation)) {
					yield break;
				}
			} else {
				if (!(pexpr.StartLocation < new TextLocation(context.Location.Line, context.Location.Column - 1) && new TextLocation(context.Location.Line, context.Location.Column + 1) < pexpr.EndLocation)) {
					yield break;
				}
			}

			yield return new CodeAction(context.TranslateString("Split string literal"), script => {
				int offset = context.GetOffset (context.Location);
				script.InsertText (offset, pexpr.LiteralValue.StartsWith("@", StringComparison.Ordinal) ? "\" + @\"" : "\" + \"");
			}, pexpr);
		}
	}
}
