Add a rule to toggle space after opening brace and before closing brace (#10447)

* Add a rule to toggle space after opening brace and before closing brace

* Make the added format option optional

* Fix merge issues

Author: zhengbli

src/harness/fourslash.ts

@@ -360,6 +360,7 @@ namespace FourSlash {
                 InsertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
                 InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
                 InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
+                InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces: true,
                 InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: false,
                 InsertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: false,
                 PlaceOpenBraceOnNewLineForFunctions: false,

src/server/editorServices.ts

@@ -1594,6 +1594,7 @@ namespace ts.server {
                 InsertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
                 InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
                 InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
+                InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces: true,
                 InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: false,
                 InsertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: false,
                 PlaceOpenBraceOnNewLineForFunctions: false,

src/services/formatting/rules.ts

@@ -50,6 +50,8 @@ namespace ts.formatting {
         // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
         public SpaceAfterOpenBrace: Rule;
         public SpaceBeforeCloseBrace: Rule;
+        public NoSpaceAfterOpenBrace: Rule;
+        public NoSpaceBeforeCloseBrace: Rule;
         public NoSpaceBetweenEmptyBraceBrackets: Rule;
 
         // Insert new line after { and before } in multi-line contexts.
@@ -287,6 +289,8 @@ namespace ts.formatting {
             // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
             this.SpaceAfterOpenBrace = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSingleLineBlockContext), RuleAction.Space));
             this.SpaceBeforeCloseBrace = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSingleLineBlockContext), RuleAction.Space));
+            this.NoSpaceAfterOpenBrace = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSingleLineBlockContext), RuleAction.Delete));
+            this.NoSpaceBeforeCloseBrace = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSingleLineBlockContext), RuleAction.Delete));
             this.NoSpaceBetweenEmptyBraceBrackets = new Rule(RuleDescriptor.create1(SyntaxKind.OpenBraceToken, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), RuleAction.Delete));
 
             // Insert new line after { and before } in multi-line contexts.
@@ -414,7 +418,7 @@ namespace ts.formatting {
                 this.SpaceAfterPostdecrementWhenFollowedBySubtract,
                 this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
                 this.NoSpaceAfterCloseBrace,
-                this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
+                this.NewLineBeforeCloseBraceInBlockContext,
                 this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
                 this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
                 this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,

src/services/formatting/rulesProvider.ts

@@ -81,6 +81,19 @@ namespace ts.formatting {
                 rules.push(this.globalRules.NoSpaceBetweenBrackets);
             }
 
+            // The default value of InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces is true
+            // so if the option is undefined, we should treat it as true as well
+            if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces !== false) {
+                rules.push(this.globalRules.SpaceAfterOpenBrace);
+                rules.push(this.globalRules.SpaceBeforeCloseBrace);
+                rules.push(this.globalRules.NoSpaceBetweenEmptyBraceBrackets);
+            }
+            else {
+                rules.push(this.globalRules.NoSpaceAfterOpenBrace);
+                rules.push(this.globalRules.NoSpaceBeforeCloseBrace);
+                rules.push(this.globalRules.NoSpaceBetweenEmptyBraceBrackets);
+            }
+
             if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
                 rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
                 rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);

src/services/types.ts

@@ -349,6 +349,7 @@ namespace ts {
         InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces?: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces?: boolean;
         PlaceOpenBraceOnNewLineForFunctions: boolean;

tests/cases/fourslash/formattingOptionsChange.ts

@@ -12,6 +12,7 @@
 ////}
 /////*PlaceOpenBraceOnNewLineForControlBlocks*/if (true)   {
 ////}
+/////*InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces*/{          var t = 1};
 
 runTest("InsertSpaceAfterCommaDelimiter", "[1, 2, 3];[72,];", "[1,2,3];[72,];");
 runTest("InsertSpaceAfterSemicolonInForStatements", "for (i = 0; i; i++);", "for (i = 0;i;i++);");
@@ -23,6 +24,7 @@ runTest("InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets", "[ 1 ];[];[];
 runTest("InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces", "`${ 1 }`; `${ 1 }`", "`${1}`; `${1}`");
 runTest("PlaceOpenBraceOnNewLineForFunctions", "class foo", "class foo {");
 runTest("PlaceOpenBraceOnNewLineForControlBlocks", "if ( true )", "if ( true ) {");
+runTest("InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces", "{ var t = 1 };", "{var t = 1};");
 
 
 function runTest(propertyName: string, expectedStringWhenTrue: string, expectedStringWhenFalse: string) {