resources/src/mediawiki.ui/components/checkbox.less

   1 @import "mediawiki.mixins";
   2 @import "mediawiki.ui/variables";
   3
   4 // Checkbox
   5 //
   6 // Styling checkboxes in a way that works cross browser is a tricky problem to solve.
   7 // In MediaWiki UI put a checkbox and label inside a mw-ui-checkbox div.
   8 // This renders in all browsers except IE6-8 which do not support the :checked selector;
   9 // these are kept backwards-compatible using the :not(#noop) selector.
  10 // You should give the checkbox and label matching "id" and "for" attributes, respectively.
  11 //
  12 // Markup:
  13 // <div class="mw-ui-checkbox">
  14 //   <input type="checkbox" id="kss-example-5"><label for="kss-example-5">Standard checkbox</label>
  15 // </div>
  16 // <div class="mw-ui-checkbox">
  17 //   <input type="checkbox" id="kss-example-5-checked" checked><label for="kss-example-5-checked">Standard checked checkbox</label>
  18 // </div>
  19 // <div class="mw-ui-checkbox">
  20 //   <input type="checkbox" id="kss-example-5-disabled" disabled><label for="kss-example-5-disabled">Disabled checkbox</label>
  21 // </div>
  22 // <div class="mw-ui-checkbox">
  23 //   <input type="checkbox" id="kss-example-5-disabled-checked" disabled checked><label for="kss-example-5-disabled-checked">Disabled checked checkbox</label>
  24 // </div>
  25 //
  26 // Styleguide 5.
  27 .mw-ui-checkbox {
  28         display: inline-block;
  29         vertical-align: middle;
  30 }
  31
  32 @checkboxSize: 2em;
  33
  34 // We use the not selector to cancel out styling on IE 8 and below
  35 .mw-ui-checkbox:not(#noop) {
  36         // Position relatively so we can make use of absolute pseudo elements
  37         position: relative;
  38         line-height: @checkboxSize;
  39
  40         * {
  41                 // reset font sizes (see bug 72727)
  42                 font: inherit;
  43                 vertical-align: middle;
  44         }
  45
  46         input[type="checkbox"] {
  47                 // we hide the input element as instead we will style the label that follows
  48                 // we use opacity so that VoiceOver software can still identify it
  49                 opacity: 0;
  50                 // ensure the invisible checkbox takes up the required width
  51                 width: @checkboxSize;
  52                 height: @checkboxSize;
  53                 // This is needed for Firefox mobile (See bug 71750 to workaround default Firefox stylesheet)
  54                 max-width: none;
  55                 margin-right: .4em;
  56
  57                 // the pseudo before element of the label after the checkbox now looks like a checkbox
  58                 & + label::before {
  59                         content: '';
  60                         cursor: pointer;
  61                         position: absolute;
  62                         left: 0;
  63                         border-radius: @borderRadius;
  64                         width: @checkboxSize;
  65                         height: @checkboxSize;
  66                         background-color: #fff;
  67                         border: 1px solid @colorGray7;
  68                         .box-sizing(border-box);
  69                 }
  70
  71                 // when the input is checked, style the label pseudo before element that followed as a checked checkbox
  72                 &:checked + label::before {
  73                         .background-image-svg('images/checked.svg', 'images/checked.png');
  74                         .background-size( @checkboxSize - 0.2em, @checkboxSize - 0.2em );
  75                         background-repeat: no-repeat;
  76                         background-position: center center;
  77                         background-origin: border-box;
  78                 }
  79
  80                 &:active + label::before {
  81                         background-color: @colorGray13;
  82                         border-color: @colorGray13;
  83                 }
  84
  85                 &:focus + label::before {
  86                         border-width: 2px;
  87                 }
  88
  89                 &:hover + label::before {
  90                         border-bottom-width: 3px;
  91                 }
  92
  93                 // disabled checkboxes have a gray background
  94                 &:disabled + label::before {
  95                         cursor: default;
  96                         background-color: @colorGray14;
  97                         border-color: @colorGray14;
  98                 }
  99
 100                 // disabled and checked checkboxes have a white circle
 101                 &:disabled:checked + label::before {
 102                         .background-image-svg('images/checked_disabled.svg', 'images/checked_disabled.png');
 103                 }
 104         }
 105 }