1 files changed, 159 insertions, 0 deletions
diff --git a/csharp/src/ProtocolBuffers/TextGenerator.cs b/csharp/src/ProtocolBuffers/TextGenerator.cs
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+++ b/csharp/src/ProtocolBuffers/TextGenerator.cs
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+#region Copyright notice and license
+
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://github.com/jskeet/dotnet-protobufs/
+// Original C++/Java/Python code:
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.IO;
+using System.Text;
+
+namespace Google.ProtocolBuffers
+{
+    /// <summary>
+    /// Helper class to control indentation. Used for TextFormat and by ProtoGen.
+    /// </summary>
+    public sealed class TextGenerator
+    {
+        /// <summary>
+        /// The string to use at the end of each line. We assume that "Print" is only called using \n
+        /// to indicate a line break; that's what we use to detect when we need to indent etc, and
+        /// *just* the \n is replaced with the contents of lineBreak.
+        /// </summary>
+        private readonly string lineBreak;
+
+        /// <summary>
+        /// Writer to write formatted text to.
+        /// </summary>
+        private readonly TextWriter writer;
+
+        /// <summary>
+        /// Keeps track of whether the next piece of text should be indented
+        /// </summary>
+        private bool atStartOfLine = true;
+
+        /// <summary>
+        /// Keeps track of the current level of indentation
+        /// </summary>
+        private readonly StringBuilder indent = new StringBuilder();
+
+        /// <summary>
+        /// Creates a generator writing to the given writer. The writer
+        /// is not closed by this class.
+        /// </summary>
+        public TextGenerator(TextWriter writer, string lineBreak)
+        {
+            this.writer = writer;
+            this.lineBreak = lineBreak;
+        }
+
+        /// <summary>
+        /// Indents text by two spaces. After calling Indent(), two spaces
+        /// will be inserted at the beginning of each line of text. Indent() may
+        /// be called multiple times to produce deeper indents.
+        /// </summary>
+        public void Indent()
+        {
+            indent.Append("  ");
+        }
+
+        /// <summary>
+        /// Reduces the current indent level by two spaces.
+        /// </summary>
+        public void Outdent()
+        {
+            if (indent.Length == 0)
+            {
+                throw new InvalidOperationException("Too many calls to Outdent()");
+            }
+            indent.Length -= 2;
+        }
+
+        public void WriteLine(string text)
+        {
+            Print(text);
+            Print("\n");
+        }
+
+        public void WriteLine(string format, params object[] args)
+        {
+            WriteLine(string.Format(format, args));
+        }
+
+        public void WriteLine()
+        {
+            WriteLine("");
+        }
+
+        /// <summary>
+        /// Prints the given text to the output stream, indenting at line boundaries.
+        /// </summary>
+        /// <param name="text"></param>
+        public void Print(string text)
+        {
+            int pos = 0;
+
+            for (int i = 0; i < text.Length; i++)
+            {
+                if (text[i] == '\n')
+                {
+                    // Strip off the \n from what we write
+                    Write(text.Substring(pos, i - pos));
+                    Write(lineBreak);
+                    pos = i + 1;
+                    atStartOfLine = true;
+                }
+            }
+            Write(text.Substring(pos));
+        }
+
+        public void Write(string format, params object[] args)
+        {
+            Write(string.Format(format, args));
+        }
+
+        private void Write(string data)
+        {
+            if (data.Length == 0)
+            {
+                return;
+            }
+            if (atStartOfLine)
+            {
+                atStartOfLine = false;
+                writer.Write(indent);
+            }
+            writer.Write(data);
+        }
+    }
+}
+\ No newline at end of file