source: branches/2925_AutoDiffForDynamicalModels/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Snippets/SnippetSelectionElement.cs

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// 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.Text;

namespace ICSharpCode.AvalonEdit.Snippets
{
  /// <summary>
  /// Inserts the previously selected text at the selection marker.
  /// </summary>
  [Serializable]
  public class SnippetSelectionElement : SnippetElement
  {
    /// <summary>
    /// Gets/Sets the new indentation of the selected text.
    /// </summary>
    public int Indentation { get; set; }
    
    /// <inheritdoc/>
    public override void Insert(InsertionContext context)
    {
      StringBuilder tabString = new StringBuilder();
      
      for (int i = 0; i < Indentation; i++) {
        tabString.Append(context.Tab);
      }
      
      string indent = tabString.ToString();
      
      string text = context.SelectedText.TrimStart(' ', '\t');
      
      text = text.Replace(context.LineTerminator,
                                   context.LineTerminator + indent);
      
      context.Document.Insert(context.InsertionPosition, text);
      context.InsertionPosition += text.Length;
      
      if (string.IsNullOrEmpty(context.SelectedText))
        SnippetCaretElement.SetCaret(context);
    }
  }
}