fix(19385): add space after brace in the multiline string template (#38742)

Author: a-tarasyuk

src/services/formatting/rules.ts

@@ -279,9 +279,9 @@ namespace ts.formatting {
             rule("NoSpaceBetweenEmptyBraceBrackets", SyntaxKind.OpenBraceToken, SyntaxKind.CloseBraceToken, [isOptionDisabled("insertSpaceAfterOpeningAndBeforeClosingEmptyBraces"), isNonJsxSameLineTokenContext], RuleAction.DeleteSpace),
 
             // Insert space after opening and before closing template string braces
-            rule("SpaceAfterTemplateHeadAndMiddle", [SyntaxKind.TemplateHead, SyntaxKind.TemplateMiddle], anyToken, [isOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), isNonJsxSameLineTokenContext], RuleAction.InsertSpace),
+            rule("SpaceAfterTemplateHeadAndMiddle", [SyntaxKind.TemplateHead, SyntaxKind.TemplateMiddle], anyToken, [isOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), isNonJsxTextContext], RuleAction.InsertSpace, RuleFlags.CanDeleteNewLines),
             rule("SpaceBeforeTemplateMiddleAndTail", anyToken, [SyntaxKind.TemplateMiddle, SyntaxKind.TemplateTail], [isOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), isNonJsxSameLineTokenContext], RuleAction.InsertSpace),
-            rule("NoSpaceAfterTemplateHeadAndMiddle", [SyntaxKind.TemplateHead, SyntaxKind.TemplateMiddle], anyToken, [isOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), isNonJsxSameLineTokenContext], RuleAction.DeleteSpace),
+            rule("NoSpaceAfterTemplateHeadAndMiddle", [SyntaxKind.TemplateHead, SyntaxKind.TemplateMiddle], anyToken, [isOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), isNonJsxTextContext], RuleAction.DeleteSpace, RuleFlags.CanDeleteNewLines),
             rule("NoSpaceBeforeTemplateMiddleAndTail", anyToken, [SyntaxKind.TemplateMiddle, SyntaxKind.TemplateTail], [isOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), isNonJsxSameLineTokenContext], RuleAction.DeleteSpace),
 
             // No space after { and before } in JSX expression
@@ -690,6 +690,10 @@ namespace ts.formatting {
         return context.TokensAreOnSameLine() && context.contextNode.kind !== SyntaxKind.JsxText;
     }
 
+    function isNonJsxTextContext(context: FormattingContext): boolean {
+        return context.contextNode.kind !== SyntaxKind.JsxText;
+    }
+
     function isNonJsxElementOrFragmentContext(context: FormattingContext): boolean {
         return context.contextNode.kind !== SyntaxKind.JsxElement && context.contextNode.kind !== SyntaxKind.JsxFragment;
     }

tests/cases/fourslash/formatNoSpaceAfterTemplateHeadAndMiddle.ts

@@ -0,0 +1,52 @@
+/// <reference path='fourslash.ts' />
+
+////const a1 = `${ 1 }${ 1 }`;
+////const a2 = `
+////    ${ 1 }${ 1 }
+////`;
+////const a3 = `
+////
+////
+////    ${ 1 }${ 1 }
+////`;
+////const a4 = `
+////
+////    ${ 1 }${ 1 }
+////
+////`;
+////const a5 = `text ${ 1 } text ${ 1 } text`;
+////const a6 = `
+////    text ${ 1 }
+////    text ${ 1 }
+////    text
+////`;
+
+format.setOption("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces", false);
+format.document();
+verify.currentFileContentIs(
+    "const a1 = `${1}${1}`;\n" +
+
+    "const a2 = `\n" +
+    "    ${1}${1}\n" +
+    "`;\n" +
+
+    "const a3 = `\n" +
+    "\n" +
+    "\n" +
+    "    ${1}${1}\n" +
+    "`;\n" +
+
+    "const a4 = `\n" +
+    "\n" +
+    "    ${1}${1}\n" +
+    "\n" +
+    "`;\n" +
+
+    "const a5 = `text ${1} text ${1} text`;\n" +
+
+    "const a6 = `\n" +
+    "    text ${1}\n" +
+    "    text ${1}\n" +
+    "    text\n" +
+    "`;"
+);

tests/cases/fourslash/formatSpaceAfterTemplateHeadAndMiddle.ts

@@ -0,0 +1,52 @@
+/// <reference path='fourslash.ts' />
+
+////const a1 = `${1}${1}`;
+////const a2 = `
+////    ${1}${1}
+////`;
+////const a3 = `
+////
+////
+////    ${1}${1}
+////`;
+////const a4 = `
+////
+////    ${1}${1}
+////
+////`;
+////const a5 = `text ${1} text ${1} text`;
+////const a6 = `
+////    text ${1}
+////    text ${1}
+////    text
+////`;
+
+format.setOption("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces", true);
+format.document();
+verify.currentFileContentIs(
+    "const a1 = `${ 1 }${ 1 }`;\n" +
+
+    "const a2 = `\n" +
+    "    ${ 1 }${ 1 }\n" +
+    "`;\n" +
+
+    "const a3 = `\n" +
+    "\n" +
+    "\n" +
+    "    ${ 1 }${ 1 }\n" +
+    "`;\n" +
+
+    "const a4 = `\n" +
+    "\n" +
+    "    ${ 1 }${ 1 }\n" +
+    "\n" +
+    "`;\n" +
+
+    "const a5 = `text ${ 1 } text ${ 1 } text`;\n" +
+
+    "const a6 = `\n" +
+    "    text ${ 1 }\n" +
+    "    text ${ 1 }\n" +
+    "    text\n" +
+    "`;"
+);