Added "One tab" indentation for SQL Formatter

src/dev/impl/DevToys/Helpers/SqlFormatter/Core/Formatter.cs

@@ -29,7 +29,7 @@ internal abstract class Formatter
         /// </summary>
         internal string Format(string query)
         {
-            return Format(query, new SqlFormatterOptions(indentationSize: 2, uppercase: false));
+            return Format(query, new SqlFormatterOptions(indentation: Models.Indentation.TwoSpaces, uppercase: false));
         }
 
         /// <summary>
@@ -38,7 +38,7 @@ internal string Format(string query)
         internal string Format(string query, SqlFormatterOptions options)
         {
             _options = options;
-            _indentation = new Indentation(options.IndentationSize);
+            _indentation = new Indentation(options.Indentation);
             _params = new Params(options.PlaceholderParameters);
 
             _tokens = GetTokenizer().Tokenize(query);
@@ -97,7 +97,7 @@ private void SetFormattedQueryFromTokens(ReadOnlySpan<char> querySpan)
                         _previousReservedToken = token;
                         break;
                     case TokenType.ReservedTopLevelNoIndent:
-                        FormatTopLvoidReservedWordNoIndent(token, querySpan);
+                        FormatTopLevelReservedWordNoIndent(token, querySpan);
                         _previousReservedToken = token;
                         break;
                     case TokenType.ReservedNewLine:
@@ -160,7 +160,7 @@ private string IndentComment(ReadOnlySpan<char> comment)
             return CommentWhitespacesRegex.Replace(comment.ToString(), $"\n{_indentation!.GetIndent()} ");
         }
 
-        private void FormatTopLvoidReservedWordNoIndent(Token token, ReadOnlySpan<char> querySpan)
+        private void FormatTopLevelReservedWordNoIndent(Token token, ReadOnlySpan<char> querySpan)
         {
             Assumes.NotNull(_indentation, nameof(_indentation));
             _indentation!.DecreaseTopLevel();

src/dev/impl/DevToys/Helpers/SqlFormatter/Core/Indentation.cs

@@ -1,5 +1,6 @@
 #nullable enable
 
+using System;
 using System.Collections.Generic;
 
 namespace DevToys.Helpers.SqlFormatter.Core
@@ -23,19 +24,25 @@ private enum IndentationType
         }
 
         private readonly Stack<IndentationType> _indentationTypes = new();
-        private readonly int _indentationSize;
+        private readonly Models.Indentation _indentation;
 
-        public Indentation(int indentationSize)
+        public Indentation(Models.Indentation indentation)
         {
-            _indentationSize = indentationSize;
+            _indentation = indentation;
         }
 
         /// <summary>
         /// Returns current indentation string.
         /// </summary>
         internal string GetIndent()
         {
-            return new string(' ', _indentationSize * _indentationTypes.Count);
+            return _indentation switch
+            {
+                Models.Indentation.TwoSpaces => new string(' ', 2 * _indentationTypes.Count),
+                Models.Indentation.FourSpaces => new string(' ', 4 * _indentationTypes.Count),
+                Models.Indentation.OneTab => new string('\t', 1 * _indentationTypes.Count),
+                _ => throw new NotSupportedException(),
+            };
         }
 
         /// <summary>

src/dev/impl/DevToys/Helpers/SqlFormatter/SqlFormatterOptions.cs

@@ -6,7 +6,7 @@ namespace DevToys.Helpers.SqlFormatter
 {
     internal struct SqlFormatterOptions
     {
-        public int IndentationSize { get; }
+        public Models.Indentation Indentation { get; }
 
         public bool Uppercase { get; }
 
@@ -15,12 +15,12 @@ internal struct SqlFormatterOptions
         public IReadOnlyDictionary<string, string>? PlaceholderParameters { get; }
 
         public SqlFormatterOptions(
-            int indentationSize,
+            Models.Indentation indentation,
             bool uppercase,
             int linesBetweenQueries = 1,
             IReadOnlyDictionary<string, string>? placeholderParameters = null)
         {
-            IndentationSize = indentationSize;
+            Indentation = indentation;
             Uppercase = uppercase;
             LinesBetweenQueries = linesBetweenQueries;
             PlaceholderParameters = placeholderParameters;

src/dev/impl/DevToys/ViewModels/Tools/Formatters/SqlFormatter/SqlFormatterToolViewModel.cs

@@ -100,7 +100,8 @@ internal SqlLanguageDisplayPair SqlLanguageMode
         /// </summary>
         internal IReadOnlyList<IndentationDisplayPair> Indentations = new ObservableCollection<IndentationDisplayPair> {
             Models.IndentationDisplayPair.TwoSpaces,
-            Models.IndentationDisplayPair.FourSpaces
+            Models.IndentationDisplayPair.FourSpaces,
+            Models.IndentationDisplayPair.OneTab
         };
 
         /// <summary>
@@ -170,6 +171,7 @@ private async Task TreatQueueAsync()
                 {
                     Models.Indentation.TwoSpaces => 2,
                     Models.Indentation.FourSpaces => 4,
+                    Models.Indentation.OneTab => 1,
                     _ => throw new NotSupportedException(),
                 };
 
@@ -178,7 +180,7 @@ private async Task TreatQueueAsync()
                         text,
                         SqlLanguageMode.Value,
                         new SqlFormatterOptions(
-                            indentationSize,
+                            IndentationMode.Value,
                             uppercase: true,
                             linesBetweenQueries: 2));
 

src/tests/DevToys.Tests/Providers/Tools/SqlFormatterTests.cs

@@ -1247,7 +1247,7 @@ private void SupportsConfigOptions(Formatter formatter)
 FROM
     Table1;";
 
-            string output = formatter.Format(input, new SqlFormatterOptions(indentationSize: 4, uppercase: false));
+            string output = formatter.Format(input, new SqlFormatterOptions(indentation: Models.Indentation.FourSpaces, uppercase: false));
             Assert.AreEqual(expectedResult, output);
 
             // supports linesBetweenQueries option
@@ -1264,7 +1264,7 @@ private void SupportsConfigOptions(Formatter formatter)
 FROM
   bar;";
 
-            output = formatter.Format(input, new SqlFormatterOptions(indentationSize: 2, uppercase: false, linesBetweenQueries: 2));
+            output = formatter.Format(input, new SqlFormatterOptions(indentation: Models.Indentation.TwoSpaces, uppercase: false, linesBetweenQueries: 2));
             Assert.AreEqual(expectedResult, output);
 
             // supports uppercase option
@@ -1280,7 +1280,20 @@ LEFT JOIN bar
   cola > 1
   AND colb = 3";
 
-            output = formatter.Format(input, new SqlFormatterOptions(indentationSize: 2, uppercase: true));
+            output = formatter.Format(input, new SqlFormatterOptions(indentation: Models.Indentation.TwoSpaces, uppercase: true));
+            Assert.AreEqual(expectedResult, output);
+
+            // supports indent option one tab
+            input = @"SELECT count(*),Column1 FROM Table1;";
+
+            expectedResult =
+string.Format(@"SELECT
+{0}count(*),
+{1}Column1
+FROM
+{2}Table1;", "\t", "\t", "\t");
+
+            output = formatter.Format(input, new SqlFormatterOptions(indentation: Models.Indentation.OneTab, uppercase: false));
             Assert.AreEqual(expectedResult, output);
         }
 
@@ -1376,7 +1389,7 @@ ELSE 3
   WHEN 'three' THEN 3
   ELSE 4
 END;";
-            string output = formatter.Format(input, new SqlFormatterOptions(indentationSize: 2, uppercase: true));
+            string output = formatter.Format(input, new SqlFormatterOptions(indentation: Models.Indentation.TwoSpaces, uppercase: true));
             Assert.AreEqual(expectedResult, output);
         }