src/doc/book/ferris.js

   1 var ferrisTypes = [
   2   {
   3     attr: 'does_not_compile',
   4     title: 'This code does not compile!'
   5   },
   6   {
   7     attr: 'panics',
   8     title: 'This code panics!'
   9   },
  10   {
  11     attr: 'not_desired_behavior',
  12     title: 'This code does not produce the desired behavior.'
  13   }
  14 ]
  15
  16 document.addEventListener('DOMContentLoaded', () => {
  17   for (var ferrisType of ferrisTypes) {
  18     attachFerrises(ferrisType)
  19   }
  20 })
  21
  22 function attachFerrises (type) {
  23   var elements = document.getElementsByClassName(type.attr)
  24
  25   for (var codeBlock of elements) {
  26     var lines = codeBlock.textContent.split(/\r|\r\n|\n/).length - 1;
  27
  28     if (lines >= 4) {
  29       attachFerris(codeBlock, type)
  30     }
  31   }
  32 }
  33
  34 function attachFerris (element, type) {
  35   var a = document.createElement('a')
  36   a.setAttribute('href', 'ch00-00-introduction.html#ferris')
  37   a.setAttribute('target', '_blank')
  38
  39   var img = document.createElement('img')
  40   img.setAttribute('src', 'img/ferris/' + type.attr + '.svg')
  41   img.setAttribute('title', type.title)
  42   img.className = 'ferris'
  43
  44   a.appendChild(img)
  45
  46   element.parentElement.insertBefore(a, element)
  47 }