source: branches/PersistenceOverhaul/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Document/RopeTextSource.cs @ 18242

// 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.IO;
using ICSharpCode.AvalonEdit.Utils;
#if NREFACTORY
using ICSharpCode.NRefactory.Editor;
#endif

namespace ICSharpCode.AvalonEdit.Document
{
  /// <summary>
  /// Implements the ITextSource interface using a rope.
  /// </summary>
  [Serializable]
  public sealed class RopeTextSource : ITextSource
  {
    readonly Rope<char> rope;
    readonly ITextSourceVersion version;
    
    /// <summary>
    /// Creates a new RopeTextSource.
    /// </summary>
    public RopeTextSource(Rope<char> rope)
    {
      if (rope == null)
        throw new ArgumentNullException("rope");
      this.rope = rope.Clone();
    }
    
    /// <summary>
    /// Creates a new RopeTextSource.
    /// </summary>
    public RopeTextSource(Rope<char> rope, ITextSourceVersion version)
    {
      if (rope == null)
        throw new ArgumentNullException("rope");
      this.rope = rope.Clone();
      this.version = version;
    }
    
    /// <summary>
    /// Returns a clone of the rope used for this text source.
    /// </summary>
    /// <remarks>
    /// RopeTextSource only publishes a copy of the contained rope to ensure that the underlying rope cannot be modified.
    /// </remarks>
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate", Justification="Not a property because it creates a clone")]
    public Rope<char> GetRope()
    {
      return rope.Clone();
    }
    
    /// <inheritdoc/>
    public string Text {
      get { return rope.ToString(); }
    }
    
    /// <inheritdoc/>
    public int TextLength {
      get { return rope.Length; }
    }
    
    /// <inheritdoc/>
    public char GetCharAt(int offset)
    {
      return rope[offset];
    }
    
    /// <inheritdoc/>
    public string GetText(int offset, int length)
    {
      return rope.ToString(offset, length);
    }
    
    /// <inheritdoc/>
    public string GetText(ISegment segment)
    {
      return rope.ToString(segment.Offset, segment.Length);
    }
    
    /// <inheritdoc/>
    public TextReader CreateReader()
    {
      return new RopeTextReader(rope);
    }
    
    /// <inheritdoc/>
    public TextReader CreateReader(int offset, int length)
    {
      return new RopeTextReader(rope.GetRange(offset, length));
    }
    
    /// <inheritdoc/>
    public ITextSource CreateSnapshot()
    {
      return this;
    }
    
    /// <inheritdoc/>
    public ITextSource CreateSnapshot(int offset, int length)
    {
      return new RopeTextSource(rope.GetRange(offset, length));
    }
    
    /// <inheritdoc/>
    public int IndexOf(char c, int startIndex, int count)
    {
      return rope.IndexOf(c, startIndex, count);
    }
    
    /// <inheritdoc/>
    public int IndexOfAny(char[] anyOf, int startIndex, int count)
    {
      return rope.IndexOfAny(anyOf, startIndex, count);
    }
    
    /// <inheritdoc/>
    public int LastIndexOf(char c, int startIndex, int count)
    {
      return rope.LastIndexOf(c, startIndex, count);
    }
    
    /// <inheritdoc/>
    public ITextSourceVersion Version {
      get { return version; }
    }
    
    /// <inheritdoc/>
    public int IndexOf(string searchText, int startIndex, int count, StringComparison comparisonType)
    {
      return rope.IndexOf(searchText, startIndex, count, comparisonType);
    }
    
    /// <inheritdoc/>
    public int LastIndexOf(string searchText, int startIndex, int count, StringComparison comparisonType)
    {
      return rope.LastIndexOf(searchText, startIndex, count, comparisonType);
    }
    
    /// <inheritdoc/>
    public void WriteTextTo(TextWriter writer)
    {
      rope.WriteTo(writer, 0, rope.Length);
    }
    
    /// <inheritdoc/>
    public void WriteTextTo(TextWriter writer, int offset, int length)
    {
      rope.WriteTo(writer, offset, length);
    }
  }
}