source: branches/RemoveBackwardsCompatibility/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Formatter/CSharpFormatter.cs

//
// CSharpFormatter.cs
//
// Author:
//       Mike KrÃŒger <mkrueger@xamarin.com>
//
// Copyright (c) 2013 Xamarin Inc. (http://xamarin.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 ICSharpCode.NRefactory.Editor;
using System.Threading;
using System.Linq;
using ICSharpCode.NRefactory.CSharp.Refactoring;
using ICSharpCode.NRefactory.TypeSystem;
using System.Collections.Generic;

namespace ICSharpCode.NRefactory.CSharp
{
  public enum FormattingMode {
    OnTheFly,
    Intrusive
  }

  /// <summary>
  /// The C# Formatter generates a set of text replace actions to format a region in a C# document.
  /// </summary>
  public class CSharpFormatter
  {
    readonly CSharpFormattingOptions policy;
    readonly TextEditorOptions options;

    /// <summary>
    /// Gets the formatting policy the formatter uses.
    /// </summary>
    public CSharpFormattingOptions Policy {
      get {
        return policy;
      }
    }

    /// <summary>
    /// Gets the text editor options the formatter uses.
    /// Note: If none was specified TextEditorOptions.Default gets used.
    /// </summary>
    public TextEditorOptions TextEditorOptions {
      get {
        return options;
      }
    }

    List<DomRegion> formattingRegions = new List<DomRegion> ();
    internal TextLocation lastFormattingLocation = new TextLocation(int.MaxValue, int.MaxValue);

    /// <summary>
    /// Gets the formatting regions. NOTE: Will get changed to IReadOnlyList.
    /// </summary>
    public IList<DomRegion> FormattingRegions {
      get {
        return formattingRegions;
      }
    }

    /// <summary>
    /// Gets or sets the formatting mode. For on the fly formatting a lightweight formatting mode
    /// gives better results.
    /// </summary>
    public FormattingMode FormattingMode {
      get;
      set;
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="ICSharpCode.NRefactory.CSharp.CSharpFormatter"/> class.
    /// </summary>
    /// <param name="policy">The formatting policy to use.</param>
    /// <param name="options">The text editor options (optional). Default is: TextEditorOptions.Default</param>
    public CSharpFormatter(CSharpFormattingOptions policy, TextEditorOptions options = null)
    {
      if (policy == null)
        throw new ArgumentNullException("policy");
      this.policy = policy;
      this.options = options ?? TextEditorOptions.Default;
    }

    /// <summary>
    /// Format the specified document and gives back the formatted text as result.
    /// </summary>
    public string Format(IDocument document)
    {
      return InternalFormat (new StringBuilderDocument (document.Text));
    }

    /// <summary>
    /// Format the specified text and gives back the formatted text as result.
    /// </summary>
    public string Format(string text)
    {
      return InternalFormat (new StringBuilderDocument (text));
    }

    string InternalFormat(IDocument document)
    {
      var syntaxTree = SyntaxTree.Parse (document, document.FileName);
      var changes = AnalyzeFormatting(document, syntaxTree);
      changes.ApplyChanges();
      return document.Text;
    }

    /// <summary>
    /// Analyzes the formatting of a given document and syntax tree.
    /// </summary>
    /// <param name="document">Document.</param>
    /// <param name="syntaxTree">Syntax tree.</param>
    /// <param name="token">The cancellation token.</param>
    public FormattingChanges AnalyzeFormatting(IDocument document, SyntaxTree syntaxTree, CancellationToken token = default (CancellationToken))
    {
      if (document == null)
        throw new ArgumentNullException("document");
      if (syntaxTree == null)
        throw new ArgumentNullException("syntaxTree");
      var result = new FormattingChanges(document);
      var visitor = new FormattingVisitor(this, document, result, token);
      syntaxTree.AcceptVisitor(visitor);
      return result;
    }

    /// <summary>
    /// Adds a region in the document that should be formatted.
    /// </summary>
    public void AddFormattingRegion (DomRegion region)
    {
      formattingRegions.Add(region);
      if (formattingRegions.Count == 1) {
        lastFormattingLocation = region.End;
      } else {
        lastFormattingLocation = lastFormattingLocation < region.End ? region.End : lastFormattingLocation;
      }
    }

  }
}