Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/codedom/compiler/IndentTextWriter.cs

@@ -0,0 +1,463 @@
+//------------------------------------------------------------------------------
+// <copyright file="IndentTextWriter.cs" company="Microsoft">
+// 
+// <OWNER>[....]</OWNER>
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.CodeDom.Compiler {
+
+    using System.Diagnostics;
+    using System;
+    using System.IO;
+    using System.Text;
+    using System.Security.Permissions;
+    using System.Globalization;
+
+    /// <devdoc>
+    ///    <para>Provides a text writer that can indent new lines by a tabString token.</para>
+    /// </devdoc>
+    public class IndentedTextWriter : TextWriter {
+        private TextWriter writer;
+        private int indentLevel;
+        private bool tabsPending;
+        private string tabString;
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public const string DefaultTabString = "    ";
+
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of <see cref='System.CodeDom.Compiler.IndentedTextWriter'/> using the specified
+        ///       text writer and default tab string.
+        ///    </para>
+        /// </devdoc>
+        public IndentedTextWriter(TextWriter writer) : this(writer, DefaultTabString) {
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of <see cref='System.CodeDom.Compiler.IndentedTextWriter'/> using the specified
+        ///       text writer and tab string.
+        ///    </para>
+        /// </devdoc>
+        public IndentedTextWriter(TextWriter writer, string tabString): base(CultureInfo.InvariantCulture) {
+            this.writer = writer;
+            this.tabString = tabString;
+            indentLevel = 0;
+            tabsPending = false;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override Encoding Encoding {
+            get {
+                return writer.Encoding;
+            }
+        }
+                                                
+        /// <devdoc>
+        ///    <para>
+        ///       Gets or sets the new line character to use.
+        ///    </para>
+        /// </devdoc>
+        public override string NewLine {
+            get {
+                return writer.NewLine;
+            }
+
+            set {
+                writer.NewLine = value;
+            }
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Gets or sets the number of spaces to indent.
+        ///    </para>
+        /// </devdoc>
+        public int Indent {
+            get {
+                return indentLevel;
+            }
+            set {
+                Debug.Assert(value >= 0, "Bogus Indent... probably caused by mismatched Indent++ and Indent--");
+                if (value < 0) {
+                    value = 0;
+                }
+                indentLevel = value;
+            }
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Gets or sets the TextWriter to use.
+        ///    </para>
+        /// </devdoc>
+        public TextWriter InnerWriter {
+            get {
+                return writer;
+            }
+        }
+
+        internal string TabString {
+            get { return tabString; }
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Closes the document being written to.
+        ///    </para>
+        /// </devdoc>
+        public override void Close() {
+            writer.Close();
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void Flush() {
+            writer.Flush();
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        protected virtual void OutputTabs() {
+            if (tabsPending) {
+                for (int i=0; i < indentLevel; i++) {
+                    writer.Write(tabString);
+                }
+                tabsPending = false;
+            }
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes a string
+        ///       to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(string s) {
+            OutputTabs();
+            writer.Write(s);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the text representation of a Boolean value to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(bool value) {
+            OutputTabs();
+            writer.Write(value);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes a character to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(char value) {
+            OutputTabs();
+            writer.Write(value);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes a
+        ///       character array to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(char[] buffer) {
+            OutputTabs();
+            writer.Write(buffer);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes a subarray
+        ///       of characters to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(char[] buffer, int index, int count) {
+            OutputTabs();
+            writer.Write(buffer, index, count);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the text representation of a Double to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(double value) {
+            OutputTabs();
+            writer.Write(value);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the text representation of
+        ///       a Single to the text
+        ///       stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(float value) {
+            OutputTabs();
+            writer.Write(value);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the text representation of an integer to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(int value) {
+            OutputTabs();
+            writer.Write(value);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the text representation of an 8-byte integer to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(long value) {
+            OutputTabs();
+            writer.Write(value);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the text representation of an object
+        ///       to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(object value) {
+            OutputTabs();
+            writer.Write(value);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes out a formatted string, using the same semantics as specified.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(string format, object arg0) {
+            OutputTabs();
+            writer.Write(format, arg0);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes out a formatted string,
+        ///       using the same semantics as specified.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(string format, object arg0, object arg1) {
+            OutputTabs();
+            writer.Write(format, arg0, arg1);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes out a formatted string,
+        ///       using the same semantics as specified.
+        ///    </para>
+        /// </devdoc>
+        public override void Write(string format, params object[] arg) {
+            OutputTabs();
+            writer.Write(format, arg);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the specified
+        ///       string to a line without tabs.
+        ///    </para>
+        /// </devdoc>
+        public void WriteLineNoTabs(string s) {
+            writer.WriteLine(s);
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the specified string followed by
+        ///       a line terminator to the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void WriteLine(string s) {
+            OutputTabs();
+            writer.WriteLine(s);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes a line terminator.
+        ///    </para>
+        /// </devdoc>
+        public override void WriteLine() {
+            OutputTabs();
+            writer.WriteLine();
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Writes the text representation of a Boolean followed by a line terminator to
+        ///       the text stream.
+        ///    </para>
+        /// </devdoc>
+        public override void WriteLine(bool value) {
+            OutputTabs();
+            writer.WriteLine(value);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(char value) {
+            OutputTabs();
+            writer.WriteLine(value);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(char[] buffer) {
+            OutputTabs();
+            writer.WriteLine(buffer);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(char[] buffer, int index, int count) {
+            OutputTabs();
+            writer.WriteLine(buffer, index, count);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(double value) {
+            OutputTabs();
+            writer.WriteLine(value);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(float value) {
+            OutputTabs();
+            writer.WriteLine(value);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(int value) {
+            OutputTabs();
+            writer.WriteLine(value);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(long value) {
+            OutputTabs();
+            writer.WriteLine(value);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(object value) {
+            OutputTabs();
+            writer.WriteLine(value);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(string format, object arg0) {
+            OutputTabs();
+            writer.WriteLine(format, arg0);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(string format, object arg0, object arg1) {
+            OutputTabs();
+            writer.WriteLine(format, arg0, arg1);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        public override void WriteLine(string format, params object[] arg) {
+            OutputTabs();
+            writer.WriteLine(format, arg);
+            tabsPending = true;
+        }
+
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        [CLSCompliant(false)]
+        public override void WriteLine(UInt32 value) {
+            OutputTabs();
+            writer.WriteLine(value);
+            tabsPending = true;
+        }
+
+        internal void InternalOutputTabs() {
+            for (int i=0; i < indentLevel; i++) {
+                writer.Write(tabString);               
+            }
+        }
+    }
+
+    internal class Indentation {
+        private IndentedTextWriter writer;
+        private int indent;
+        private string s;
+
+        internal Indentation(IndentedTextWriter writer, int indent) {
+            this.writer = writer;
+            this.indent = indent;
+            s = null;
+        }
+
+        internal string IndentationString {
+            get {
+                if ( s == null) {
+                    string tabString = writer.TabString;
+                    StringBuilder sb = new StringBuilder(indent * tabString.Length);
+                    for( int i = 0; i < indent; i++) {
+                        sb.Append(tabString);
+                    }
+                    s = sb.ToString();
+                }
+                return s;
+            }
+        }        
+    }
+}