Fixes space-tab indentation issues

Author: ziacik

src/services/formatting/formatting.ts

@@ -866,13 +866,23 @@ namespace ts.formatting {
  }
  else {
  let tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
- if (indentation !== tokenStart.character) {
-  let startLinePosition = getStartPositionOfLine(tokenStart.line, sourceFile);
+ let startLinePosition = getStartPositionOfLine(tokenStart.line, sourceFile);
+ if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
  recordReplace(startLinePosition, tokenStart.character, indentationString);
  }
  }
  }
 
+ function indentationIsDifferent(indentationString: string, startLinePosition: number): boolean {
+ let size = indentationString.length;
+ for (let i = 0; i < size; i++) {
+ if (indentationString.charCodeAt(i) !== sourceFile.text.charCodeAt(startLinePosition + i)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
  function indentMultilineComment(commentRange: TextRange, indentation: number, firstLineIsIndented: boolean) {
  // split comment in lines
  let startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
@@ -1152,4 +1162,4 @@ namespace ts.formatting {
  return s;
  }
  }
-}
+}