122 lines
3.4 KiB
C#
122 lines
3.4 KiB
C#
// ====================================================================================================
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// YAML Parser for the .NET Framework
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// ====================================================================================================
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//
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// Copyright (c) 2006
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// Christophe Lambrechts
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// Jonathan Slenders
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//
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// ====================================================================================================
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// This file is part of the .NET YAML Parser.
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//
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// This .NET YAML parser is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// The .NET YAML parser is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with Foobar; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USAusing System.Reflection;
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// ====================================================================================================
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#define ENABLE_COMPRESSION
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using System;
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using System.Collections;
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using System.IO;
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namespace Yaml
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{
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/// <summary>
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/// Help class for writing a Yaml tree to a string
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/// </summary>
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public class WriteStream
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{
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private TextWriter stream;
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private int indentation = 0;
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private bool lastcharisnewline = false;
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private static string indentationChars = " ";
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/// <summary> Constructor </summary>
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public WriteStream (TextWriter stream)
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{
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this.stream = stream;
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}
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/// <summary> Append a string </summary>
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public void Append (string s)
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{
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// Just add the text to the output stream when
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// there is no indentation
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if (indentation == 0)
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stream.Write (s);
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// Otherwise process each individual char
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else
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for (int i = 0; i < s.Length; i ++)
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{
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// Indent after a newline
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if (lastcharisnewline)
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{
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WriteIndentation ();
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lastcharisnewline = false;
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}
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// Add char
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stream.Write (s [i]);
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// Remember newlines
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if (s [i] == '\n')
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lastcharisnewline = true;
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}
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}
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/// <summary> Indentation </summary>
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public void Indent ()
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{
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// Increase indentation level
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indentation ++;
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// Add a newline
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#if ENABLE_COMPRESSION
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lastcharisnewline = false;
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#else
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stream.Write ("\n");
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lastcharisnewline = true;
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#endif
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}
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/// <summary> Write the indentation to the output stream </summary>
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private void WriteIndentation ()
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{
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for (int i = 0; i < indentation; i ++)
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stream.Write (indentationChars);
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}
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/// <summary> Unindent </summary>
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public void UnIndent ()
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{
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if (indentation > 0)
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{
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// Decrease indentation level
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indentation --;
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// Add a newline
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if (! lastcharisnewline)
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stream.Write ("\n");
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lastcharisnewline = true;
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}
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else
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throw new Exception ("Cannot unindent a not indented writestream.");
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}
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}
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}
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