Support tab indentation

The autofix for this rule substitutes spaces even when the code is normally indented with tabs. This change accommodates tabs, spaces, and even mixed whitespace (we won't judge).

Author: arperry

lib/rules/jsx-closing-bracket-location.js

@@ -146,6 +146,25 @@ module.exports = {
       }
     }
 
+    /**
+     * Get the characters used for indentation on the line to be matched
+     * @param {Object} tokens Locations of the opening bracket, closing bracket and last prop
+     * @param {String} expectedLocation Expected location for the closing bracket
+     * @return {String} The characters used for indentation
+     */
+    function getIndentation(tokens, expectedLocation) {
+      switch (expectedLocation) {
+        case 'props-aligned':
+          return /^\s*/.exec(sourceCode[tokens.lastProp.lastLine])[0];
+        case 'tag-aligned':
+          return /^\s*/.exec(sourceCode[tokens.opening.line])[0];
+        case 'line-aligned':
+          return /^\s*/.exec(sourceCode[tokens.openingStartOfLine.line])[0];
+        default:
+          return '';
+      }
+    }
+
     /**
      * Get the locations of the opening bracket, closing bracket, last prop, and
      * start of opening line.
@@ -244,9 +263,8 @@ module.exports = {
               case 'props-aligned':
               case 'tag-aligned':
               case 'line-aligned':
-                var spaces = new Array(+correctColumn + 1);
                 return fixer.replaceTextRange([cachedLastAttributeEndPos, node.end],
-                  '\n' + spaces.join(' ') + closingTag);
+                  '\n' + getIndentation(tokens, expectedLocation) + closingTag);
               default:
                 return true;
             }