disable indentation when in brace shell

This pattern can also be used to format JSX end tag.

src/services/formatting/formatting.ts

@@ -403,19 +403,8 @@ namespace ts.formatting {
                         indentation = parentDynamicIndentation.getIndentation();
                     }
                 }
-                else if (node.kind === SyntaxKind.NamedExports || node.kind === SyntaxKind.ImportClause) {
-                    let blockParent = node.kind === SyntaxKind.ImportClause ?
-                        (<ImportClause>node).namedBindings : node;
-
-                    let children = (<NamedExports | ImportClause>blockParent).getChildren(sourceFile);
-                    // Detect named export/import pseudo-block
-                    if (children[0] && children[0].kind === SyntaxKind.OpenBraceToken &&
-                        children[2] && children[2].kind === SyntaxKind.CloseBraceToken) {
-                        indentation = parentDynamicIndentation.getIndentation();
-                    }
-                    else {
-                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta();
-                    }
+                else if (SmartIndenter.isIndentationPrevented(node)) {
+                    indentation = parentDynamicIndentation.getIndentation();
                 }
                 else {
                     if (SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {

src/services/formatting/smartIndenter.ts

@@ -133,7 +133,9 @@ namespace ts.formatting {
                 }
 
                 // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
-                if (shouldIndentChildNode(parent.kind, current.kind) && !parentAndChildShareLine) {
+                if (shouldIndentChildNode(parent.kind, current.kind) &&
+                    !isIndentationPrevented(current) && !parentAndChildShareLine) {
+
                     indentationDelta += options.IndentSize;
                 }
 
@@ -475,5 +477,23 @@ namespace ts.formatting {
                     return false;
             }
         }
+
+        function hasBraceShell(node: Node) {
+            let children = node.getChildren();
+            let last = children.length - 1;
+            // Check if node looks like a block
+            return children[0] && children[0].kind === SyntaxKind.OpenBraceToken &&
+                children[last] && children[last].kind === SyntaxKind.CloseBraceToken;
+        }
+
+        export function isIndentationPrevented(node: TextRangeWithKind) {
+            switch (node.kind) {
+                case SyntaxKind.NamedExports:
+                    return hasBraceShell(<NamedExports>node);
+                case SyntaxKind.ImportClause:
+                    return hasBraceShell((<ImportClause>node).namedBindings);
+            }
+            return false;
+        }
     }
 }