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Viewing changes to contrib/ICSharpCode.NRefactory.CSharp/OutputVisitor/TextWriterOutputFormatter.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
ImportĀ upstreamĀ versionĀ 4.0.5+dfsg

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contrib/ICSharpCode.NRefactory.CSharp/OutputVisitor/TextWriterOutputFormatter.cs
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ļ»æ// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
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// 
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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// 
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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// 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.IO;
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namespace ICSharpCode.NRefactory.CSharp
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{
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        /// <summary>
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        /// Writes C# code into a TextWriter.
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        /// </summary>
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        public class TextWriterOutputFormatter : IOutputFormatter
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        {
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                readonly TextWriter textWriter;
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                int indentation;
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                bool needsIndent = true;
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                bool isAtStartOfLine = true;
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                public int Indentation {
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                        get {
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                                return this.indentation;
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                        }
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                        set {
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                                this.indentation = value;
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                        }
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                }
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                public string IndentationString { get; set; }
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                public TextWriterOutputFormatter(TextWriter textWriter)
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                {
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                        if (textWriter == null)
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                                throw new ArgumentNullException("textWriter");
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                        this.textWriter = textWriter;
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                        this.IndentationString = "\t";
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                }
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                public void WriteIdentifier(string ident)
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                {
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                        WriteIndentation();
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                        textWriter.Write(ident);
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                        isAtStartOfLine = false;
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                }
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                public void WriteKeyword(string keyword)
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                {
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                        WriteIndentation();
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                        textWriter.Write(keyword);
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                        isAtStartOfLine = false;
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                }
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                public void WriteToken(string token)
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                {
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                        WriteIndentation();
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                        textWriter.Write(token);
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                        isAtStartOfLine = false;
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                }
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                public void Space()
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                {
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                        WriteIndentation();
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                        textWriter.Write(' ');
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                }
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                public void OpenBrace(BraceStyle style)
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                {
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                        switch (style) {
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                                case BraceStyle.DoNotChange:
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                                case BraceStyle.EndOfLine:
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                                case BraceStyle.BannerStyle:
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                                        WriteIndentation();
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                                        if (!isAtStartOfLine)
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                                                textWriter.Write(' ');
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                                        textWriter.Write('{');
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                                        break;
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                                case BraceStyle.EndOfLineWithoutSpace:
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                                        WriteIndentation();
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                                        textWriter.Write('{');
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                                        break;
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                                case BraceStyle.NextLine:
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                                        if (!isAtStartOfLine)
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                                                NewLine();
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                                        WriteIndentation();
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                                        textWriter.Write('{');
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                                        break;
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                                case BraceStyle.NextLineShifted:
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                                        NewLine ();
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                                        Indent();
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                                        WriteIndentation();
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                                        textWriter.Write('{');
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                                        NewLine();
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                                        return;
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                                case BraceStyle.NextLineShifted2:
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                                        NewLine ();
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                                        Indent();
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                                        WriteIndentation();
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                                        textWriter.Write('{');
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                                        break;
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                                default:
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                                        throw new ArgumentOutOfRangeException ();
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                        }
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                        Indent();
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                        NewLine();
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                }
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                public void CloseBrace(BraceStyle style)
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                {
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                        switch (style) {
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                                case BraceStyle.DoNotChange:
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                                case BraceStyle.EndOfLine:
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                                case BraceStyle.EndOfLineWithoutSpace:
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                                case BraceStyle.NextLine:
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                                        Unindent();
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                                        WriteIndentation();
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                                        textWriter.Write('}');
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                                        isAtStartOfLine = false;
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                                        break;
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                                case BraceStyle.BannerStyle:
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                                case BraceStyle.NextLineShifted:
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                                        WriteIndentation();
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                                        textWriter.Write('}');
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                                        isAtStartOfLine = false;
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                                        Unindent();
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                                        break;
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                                case BraceStyle.NextLineShifted2:
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                                        Unindent();
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                                        WriteIndentation();
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                                        textWriter.Write('}');
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                                        isAtStartOfLine = false;
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                                        Unindent();
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                                        break;
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                                default:
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                                        throw new ArgumentOutOfRangeException ();
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                        }
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                }
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                protected void WriteIndentation()
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                {
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                        if (needsIndent) {
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                                needsIndent = false;
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                                for (int i = 0; i < indentation; i++) {
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                                        textWriter.Write(this.IndentationString);
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                                }
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                        }
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                }
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                public void NewLine()
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                {
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                        textWriter.WriteLine();
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                        needsIndent = true;
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                        isAtStartOfLine = true;
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                }
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                public void Indent()
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                {
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                        indentation++;
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                }
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                public void Unindent()
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                {
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                        indentation--;
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                }
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                public void WriteComment(CommentType commentType, string content)
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                {
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                        WriteIndentation();
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                        switch (commentType) {
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                                case CommentType.SingleLine:
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                                        textWriter.Write("//");
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                                        textWriter.WriteLine(content);
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                                        needsIndent = true;
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                                        isAtStartOfLine = true;
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                                        break;
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                                case CommentType.MultiLine:
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                                        textWriter.Write("/*");
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                                        textWriter.Write(content);
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                                        textWriter.Write("*/");
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                                        isAtStartOfLine = false;
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                                        break;
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                                case CommentType.Documentation:
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                                        textWriter.Write("///");
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                                        textWriter.WriteLine(content);
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                                        needsIndent = true;
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                                        isAtStartOfLine = true;
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                                        break;
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                                default:
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                                        textWriter.Write(content);
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                                        break;
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                        }
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                }
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                public void WritePreProcessorDirective(PreProcessorDirectiveType type, string argument)
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                {
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                        // pre-processor directive must start on its own line
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                        if (!isAtStartOfLine)
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                                NewLine();
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                        WriteIndentation();
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                        textWriter.Write('#');
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                        textWriter.Write(type.ToString().ToLowerInvariant());
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                        if (!string.IsNullOrEmpty(argument)) {
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                                textWriter.Write(' ');
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                                textWriter.Write(argument);
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                        }
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                        NewLine();
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                }
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                public virtual void StartNode(AstNode node)
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                {
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                        // Write out the indentation, so that overrides of this method
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                        // can rely use the current output length to identify the position of the node
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                        // in the output.
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                        WriteIndentation();
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                }
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                public virtual void EndNode(AstNode node)
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                {
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                }
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        }
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}