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-rw-r--r--csharp/ProtocolBuffers/TextGenerator.cs115
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diff --git a/csharp/ProtocolBuffers/TextGenerator.cs b/csharp/ProtocolBuffers/TextGenerator.cs
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-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.
-// http://code.google.com/p/protobuf/
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-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>
- /// 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>
- bool atStartOfLine = true;
-
- /// <summary>
- /// Keeps track of the current level of indentation
- /// </summary>
- 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) {
- this.writer = writer;
- }
-
- /// <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') {
- // TODO(jonskeet): Use Environment.NewLine?
- Write(text.Substring(pos, i - pos + 1));
- 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);
- }
- }
-}