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 IE 6-8 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-3">
  15 //   <label for="kss-example-3">Standard checkbox</label>
  16 // </div>
  17 // <div class="mw-ui-checkbox">
  18 //   <input type="checkbox" id="kss-example-3-checked" checked>
  19 //   <label for="kss-example-3-checked">Standard checked checkbox</label>
  20 // </div>
  21 // <div class="mw-ui-checkbox">
  22 //   <input type="checkbox" id="kss-example-3-disabled" disabled>
  23 //   <label for="kss-example-3-disabled">Disabled checkbox</label>
  24 // </div>
  25 // <div class="mw-ui-checkbox">
  26 //   <input type="checkbox" id="kss-example-3-disabled-checked" disabled checked>
  27 //   <label for="kss-example-3-disabled-checked">Disabled checked checkbox</label>
  28 // </div>
  29 //
  30 // Styleguide 3.
  31 .mw-ui-checkbox {
  32         display: inline-block;
  33         line-height: @sizeInputBinary;
  34         vertical-align: middle;
  35 }
  36
  37 // We use the `:not` selector to cancel out styling on IE 8 and below
  38 // Note: This may be broken on older Opera Mini devices.
  39 .mw-ui-checkbox:not( #noop ) {
  40         display: table;
  41         // Position relatively so we can make use of absolute pseudo elements
  42         position: relative;
  43
  44         * {
  45                 // Reset font sizes, see T74727
  46                 font: inherit;
  47                 vertical-align: middle;
  48         }
  49
  50         [ type='checkbox' ] {
  51                 display: table-cell;
  52                 position: relative;
  53                 // Ensure the invisible input takes up the required `width` & `height`
  54                 width: @sizeInputBinary;
  55                 height: @sizeInputBinary;
  56                 // Support: Firefox mobile to override user-agent stylesheet, see T73750
  57                 max-width: none;
  58                 margin: 0;
  59                 // Hide `input[type=checkbox]` and instead style the label that follows
  60                 // Support: VoiceOver. Use `opacity` so that VoiceOver can still identify the checkbox
  61                 opacity: 0;
  62                 // Render *on top of* the label, so that it's still clickable, see T98905
  63                 z-index: 1;
  64
  65                 & + label {
  66                         display: table-cell;
  67                         padding-left: 0.4em;
  68                 }
  69
  70                 // Pseudo `:before` element of the label after the checkbox now looks like a checkbox
  71                 & + label:before {
  72                         content: '';
  73                         background-color: #fff;
  74                         background-origin: border-box;
  75                         background-position: center center;
  76                         background-repeat: no-repeat;
  77                         .background-size( 0, 0 );
  78                         .box-sizing( border-box );
  79                         position: absolute;
  80                         // Ensure alignment of checkbox to middle of the text in long labels, see T85241
  81                         top: 50%;
  82                         left: 0;
  83                         width: @sizeInputBinary;
  84                         height: @sizeInputBinary;
  85                         margin-top: -( @sizeInputBinary / 2 );
  86                         border: 1px solid @colorGray7;
  87                         border-radius: @borderRadius;
  88                 }
  89
  90                 // Apply a checkmark on the pseudo `:before` element when the input is checked
  91                 &:checked + label:before {
  92                         .background-image-svg( 'images/checkbox-checked.svg', 'images/checkbox-checked.png' );
  93                         .background-size( 90%, 90% );
  94                 }
  95
  96                 &:enabled {
  97                         cursor: pointer;
  98
  99                         & + label {
 100                                 cursor: pointer;
 101                         }
 102
 103                         & + label:before {
 104                                 cursor: pointer;
 105                                 .transition( ~'background-color 100ms, color 100ms, border-color 100ms, box-shadow 100ms' );
 106                         }
 107
 108                         // `:focus` has to come first, otherwise a specificity race with `:hover:focus` etc is necessary
 109                         &:focus + label:before {
 110                                 border-color: @colorProgressive;
 111                                 box-shadow: @boxShadowWidgetFocus;
 112                         }
 113
 114                         &:hover + label:before {
 115                                 border-color: @colorProgressive;
 116                         }
 117
 118                         &:active + label:before {
 119                                 background-color: @colorProgressiveActive;
 120                                 border-color: @borderColorInputBinaryActive;
 121                                 box-shadow: @boxShadowInputBinaryActive;
 122                         }
 123
 124                         &:checked {
 125                                 & + label:before {
 126                                         background-color: @backgroundColorInputBinaryChecked;
 127                                         border-color: @borderColorInputBinaryChecked;
 128                                 }
 129
 130                                 &:focus + label:before {
 131                                         background-color: @backgroundColorInputBinaryChecked;
 132                                         border-color: @borderColorInputBinaryChecked;
 133                                         box-shadow: @boxShadowProgressiveFocus;
 134                                 }
 135
 136                                 &:hover + label:before {
 137                                         background-color: @colorProgressiveHighlight;
 138                                         border-color: @colorProgressiveHighlight;
 139                                 }
 140
 141                                 &:active + label:before {
 142                                         background-color: @backgroundColorInputBinaryActive;
 143                                         border-color: @borderColorInputBinaryActive;
 144                                 }
 145                         }
 146                 }
 147
 148                 // disabled checkboxes have a gray background
 149                 &:disabled + label:before {
 150                         background-color: @colorGray12;
 151                         border-color: @colorGray12;
 152                 }
 153         }
 154 }