review.tizen.org Git - platform/framework/web/crosswalk-tizen.git/blob

   1 /**
   2  * @fileoverview Disallow mixed spaces and tabs for indentation
   3  * @author Jary Niebur
   4  * @copyright 2014 Nicholas C. Zakas. All rights reserved.
   5  * @copyright 2014 Jary Niebur. All rights reserved.
   6  */
   7 "use strict";
   8
   9 //------------------------------------------------------------------------------
  10 // Rule Definition
  11 //------------------------------------------------------------------------------
  12
  13 module.exports = function(context) {
  14
  15     var smartTabs;
  16
  17     switch (context.options[0]) {
  18         case true: // Support old syntax, maybe add deprecation warning here
  19         case "smart-tabs":
  20             smartTabs = true;
  21             break;
  22         default:
  23             smartTabs = false;
  24     }
  25
  26     var COMMENT_START = /^\s*\/\*/,
  27         MAYBE_COMMENT = /^\s*\*/;
  28
  29     //--------------------------------------------------------------------------
  30     // Public
  31     //--------------------------------------------------------------------------
  32
  33     return {
  34
  35         "Program": function(node) {
  36             /*
  37              * At least one space followed by a tab
  38              * or the reverse before non-tab/-space
  39              * characters begin.
  40              */
  41             var regex = /^(?=[\t ]*(\t | \t))/,
  42                 match,
  43                 lines = context.getSourceLines();
  44
  45             if (smartTabs) {
  46                 /*
  47                  * At least one space followed by a tab
  48                  * before non-tab/-space characters begin.
  49                  */
  50                 regex = /^(?=[\t ]* \t)/;
  51             }
  52
  53             lines.forEach(function(line, i) {
  54                 match = regex.exec(line);
  55
  56                 if (match) {
  57
  58                     if (!MAYBE_COMMENT.test(line) && !COMMENT_START.test(lines[i - 1])) {
  59                         context.report(node, { line: i + 1, column: match.index + 1 }, "Mixed spaces and tabs.");
  60                     }
  61
  62                 }
  63             });
  64         }
  65
  66     };
  67
  68 };