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

   1 /**
   2  * @fileoverview Disallows multiple blank lines.
   3  * implementation adapted from the no-trailing-spaces rule.
   4  * @author Greg Cochard
   5  * @copyright 2014 Greg Cochard. All rights reserved.
   6  */
   7 "use strict";
   8
   9 //------------------------------------------------------------------------------
  10 // Rule Definition
  11 //------------------------------------------------------------------------------
  12
  13 module.exports = function(context) {
  14
  15     // Use options.max or 2 as default
  16     var numLines = 2;
  17
  18     if (context.options.length) {
  19         numLines = context.options[0].max;
  20     }
  21
  22     //--------------------------------------------------------------------------
  23     // Public
  24     //--------------------------------------------------------------------------
  25
  26     return {
  27
  28         "Program": function checkBlankLines(node) {
  29             var lines = context.getSourceLines(),
  30                 currentLocation = -1,
  31                 lastLocation,
  32                 blankCounter = 0,
  33                 location,
  34                 trimmedLines = lines.map(function(str) {
  35                     return str.trim();
  36                 });
  37
  38             // Aggregate and count blank lines
  39             do {
  40                 lastLocation = currentLocation;
  41                 currentLocation = trimmedLines.indexOf("", currentLocation + 1);
  42                 if (lastLocation === currentLocation - 1) {
  43                     blankCounter++;
  44                 } else {
  45                     if (blankCounter >= numLines) {
  46                         location = {
  47                             line: lastLocation + 1,
  48                             column: lines[lastLocation].length
  49                         };
  50                         context.report(node, location, "Multiple blank lines not allowed.");
  51                     }
  52
  53                     // Finally, reset the blank counter
  54                     blankCounter = 0;
  55                 }
  56             } while (currentLocation !== -1);
  57         }
  58     };
  59
  60 };