Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Xml/System/Xml/Serialization/indentedWriter.cs

@@ -0,0 +1,66 @@
+//------------------------------------------------------------------------------
+// <copyright file="IndentedWriter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Xml.Serialization {
+
+    using System.IO;
+    
+    /// <include file='doc\IndentedWriter.uex' path='docs/doc[@for="IndentedWriter"]/*' />
+    /// <devdoc>
+    ///     This class will write to a stream and manage indentation.
+    /// </devdoc>
+    internal class IndentedWriter {
+        TextWriter writer;
+        bool needIndent;
+        int indentLevel;
+        bool compact;
+        
+        internal IndentedWriter(TextWriter writer, bool compact) {
+            this.writer = writer;
+            this.compact = compact;
+        }
+
+        internal int Indent {
+            get {
+                return indentLevel;
+            }
+            set {
+                indentLevel = value;
+            }
+        }
+        
+        internal void Write(string s) {
+            if (needIndent) WriteIndent();
+            writer.Write(s);
+        }
+        
+        internal void Write(char c) {
+            if (needIndent) WriteIndent();
+            writer.Write(c);
+        }
+        
+        internal void WriteLine(string s) {
+            if (needIndent) WriteIndent();
+            writer.WriteLine(s);
+            needIndent = true;
+        }
+        
+        internal void WriteLine() {
+            writer.WriteLine();
+            needIndent = true;
+        }
+
+        internal void WriteIndent() {
+            needIndent = false;
+            if (!compact) {
+                for (int i = 0; i < indentLevel; i++) {
+                    writer.Write("    ");
+                }
+            }
+        }
+    }
+}