source: trunk/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/IndentEngine/IDocumentIndentEngine.cs

//
// IDocumentIndentEngine.cs
//
// Author:
//       Matej Miklečić <matej.miklecic@gmail.com>
//
// Copyright (c) 2013 Matej Miklečić (matej.miklecic@gmail.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 ICSharpCode.NRefactory.Editor;
using System;

namespace ICSharpCode.NRefactory.CSharp
{
  /// <summary>
  ///     The base interface for all indent engines.
  /// </summary>
  public interface IDocumentIndentEngine : ICloneable
  {
    /// <summary>
    ///     A reference to the document that's parsed by the engine.
    /// </summary>
    IDocument Document { get; }

    /// <summary>
    ///     The indentation string of the current line.
    /// </summary>
    string ThisLineIndent { get; }

    /// <summary>
    ///     The indentation string of the next line.
    /// </summary>
    string NextLineIndent { get; }

    /// <summary>
    ///     The indent string on the beginning of the current line.
    /// </summary>
    string CurrentIndent { get; }

    /// <summary>
    ///     True if the current line needs to be reindented.
    /// </summary>
    bool NeedsReindent { get; }

    /// <summary>
    ///     The current offset of the engine.
    /// </summary>
    int Offset { get; }

    /// <summary>
    ///     The current location of the engine.
    /// </summary>
    TextLocation Location { get; }

    /// <summary>
    ///     If this is true, the engine should try to adjust its indent 
    ///     levels to manual user's corrections, even if they are wrong.
    /// </summary>
    bool EnableCustomIndentLevels { get; set; }

    /// <summary>
    ///     Pushes a new char into the engine which calculates the new
    ///     indentation levels.
    /// </summary>
    /// <param name="ch">
    ///     A new character.
    /// </param>
    void Push(char ch);

    /// <summary>
    ///     Resets the engine.
    /// </summary>
    void Reset();

    /// <summary>
    ///     Updates the engine to the given offset.
    /// </summary>
    /// <param name="offset">
    ///     Valid offset in <see cref="Document"/>.
    /// </param>
    void Update(int offset);

    /// <summary>
    ///     Clones the engine and preserves the current state.
    /// </summary>
    /// <returns>
    ///     An indentical clone which can operate without interference
    ///     with this engine.
    /// </returns>
    new IDocumentIndentEngine Clone();
  }
}