resources/src/mediawiki.less/mediawiki.mixins.less

   1 // Common Less mixin library for MediaWiki
   2 //
   3 // By default the folder containing this file is included in $wgResourceLoaderLESSImportPaths,
   4 // which makes this file importable by all less files via `@import 'mediawiki.mixins';`.
   5 //
   6 // The mixins included below are considered a public interface for MediaWiki extensions.
   7 // The signatures of parametrized mixins should be kept as stable as possible.
   8 //
   9 // See <http://lesscss.org/#-mixins> for more information about how to write mixins.
  10
  11 .background-image( @url ) {
  12         background-image: e( '/* @embed */' ) url( @url );
  13 }
  14
  15 // Deprecated in MW 1.27
  16 .background-size( @width, @height ) {
  17         // Vendor prefix is added to support Android 2
  18         -webkit-background-size: @width @height;
  19         background-size: @width @height;
  20 }
  21
  22 .vertical-gradient( @startColor: gray, @endColor: white, @startPos: 0, @endPos: 100% ) {
  23         background-color: @endColor;
  24         background-image: -webkit-linear-gradient( top, @startColor @startPos, @endColor @endPos ); // Safari 5.1+, Chrome 10+
  25         background-image: -moz-linear-gradient( top, @startColor @startPos, @endColor @endPos ); // Firefox 3.6+
  26         background-image: linear-gradient( @startColor @startPos, @endColor @endPos ); // Standard
  27 }
  28
  29 // SVG support using a transparent gradient to guarantee cross-browser
  30 // compatibility (browsers able to understand gradient syntax support also SVG).
  31 // http://pauginer.tumblr.com/post/36614680636/invisible-gradient-technique
  32 //
  33 // We use gzip compression, which means that it is okay to embed twice.
  34 //
  35 // We do not embed the fallback image on the assumption that the gain for old browsers
  36 // is not worth the harm done to modern ones.
  37 .background-image-svg( @svg, @fallback ) {
  38         background-image: url( @fallback );
  39         background-image: linear-gradient( transparent, transparent ), e( '/* @embed */' ) url( @svg );
  40 }
  41
  42 // Shorthand for background-image-svg. Use if your PNG and SVG have the same name
  43 // and only if you cannot use ResourceLoaderImage module for some particular reason.
  44 .background-image-svg-quick( @url ) {
  45         .background-image-svg( ~'@{url}.svg', ~'@{url}.png' );
  46 }
  47
  48 .list-style-image( @url ) {
  49         list-style-image: e( '/* @embed */' ) url( @url );
  50 }
  51
  52 .list-style-image-svg( @svg, @fallback ) {
  53         list-style-image: e( '/* @embed */' ) url( @svg );
  54         /* Fallback to PNG bullet for IE 8 and below using CSS hack */
  55         list-style-image: e( '/* @embed */' ) url( @fallback ) e( '\9' );
  56 }
  57
  58 .hyphens( @value: auto ) {
  59         & when ( @value = auto ){
  60                 // Legacy `word-wrap`; IE 6-11, Edge 12+, Firefox 3.5+, Chrome 4+, Safari 3.1+,
  61                 //   Opera 11.5+, iOS 3.2+, Android 2.1+
  62                 // `overflow-wrap` is W3 standard, but it doesn't seem as if browser vendors
  63                 //   will abandon `word-wrap` (it has wider support), therefore no duplication.
  64                 word-wrap: break-word;
  65         }
  66         & when ( @value = none ) {
  67                 word-wrap: normal;
  68         }
  69
  70         // CSS3 hyphenation
  71         -webkit-hyphens: @value; // Safari 5.1+, iOS 4.3+
  72         -moz-hyphens: @value;    // Firefox 6-42
  73         -ms-hyphens: @value;     // IE 10-11, Edge 12+
  74         hyphens: @value;         // Firefox 43+, Chrome 55+, Android 62+, UC Browser 11.8+, Samsung 6.2+
  75 }
  76
  77 .transform( @value ) {
  78         -webkit-transform: @value; // Safari 3.1-8.0, iOS 3.2-8.4, Android 2.1-4.4.4
  79         -moz-transform: @value; // Firefox 3.5-15
  80         transform: @value; // Chrome 36+, Firefox 16+, IE 10+, Safari 9+, Opera 23+, iOS 9.2+, Android 5+
  81 }
  82
  83 .transition( @value ) {
  84         -webkit-transition: @value; // Safari 3.1-6.0, iOS 3.2-6.1, Android 2.1-4.3
  85         -moz-transition: @value; // Firefox 4-15
  86         transition: @value; // Chrome 26+, Firefox 16+, IE 10+, Safari 6.1+, Opera 12.1+, iOS 7+, Android 4.4+
  87 }
  88
  89 // Provide a hardware accelerated transform transition
  90 // We can't use `.transition()` because WebKit requires `-webkit-` prefix before `transform`
  91 // Example usage: `.transition-transform( 1s, opacity 2s );`
  92 // First parameter is additional options for `transform` transition commencing with
  93 // duration property @see https://www.w3.org/TR/css3-transitions/#transition-duration-property
  94 // and remaining parameters are additional transitions."
  95 .transition-transform( ... ) {
  96         -webkit-backface-visibility: hidden; // Older Webkit browsers: Promote element to a composite layer & involve the GPU
  97
  98         -webkit-transition: -webkit-transform @arguments; // Safari 3.1-8, iOS 3.2-8.4, Android 2.1-4.4.4
  99         -moz-transition: -moz-transform @arguments; // Firefox 4-15 for `-moz-transition`
 100         transition: transform @arguments; // Chrome 36+, Firefox 16+, IE 10+, Safari 9+, Opera 12.1+, iOS 9.2+, Android 36+
 101 }
 102
 103 .box-sizing( @value ) {
 104         -webkit-box-sizing: @value; // Safari 3.1-5.0, iOS 3.2-4.3, Android 2.1-3.0
 105         -moz-box-sizing: @value; // Firefox 4-28,
 106         box-sizing: @value; // Chrome 10+, Firefox 29+, IE 8+, Safari 5.1+, Opera 10+, iOS 5+, Android 4+
 107 }
 108
 109 .box-shadow( @value ) {
 110         -webkit-box-shadow: @value; // Safari 3.1-5.0, iOS 3.2-4.3, Android 2.1-3.0
 111         box-shadow: @value; // Chrome 10+, Firefox 4+, IE 9+, Safari 5.1+, Opera 11+, iOS 5+, Android 4+
 112 }
 113
 114 .column-count( @value ) {
 115         -webkit-column-count: @value;
 116         -moz-column-count: @value;
 117         column-count: @value;
 118 }
 119
 120 .column-width( @value ) {
 121         -webkit-column-width: @value; // Chrome Any, Safari 3+, Opera 15+
 122         -moz-column-width: @value; // Firefox 1.5+
 123         column-width: @value; // IE 10+, Opera 11.1-12.1
 124 }
 125
 126 .column-break-inside-avoid() {
 127         -webkit-column-break-inside: avoid; // Chrome Any, Safari 3+, Opera 15+
 128         page-break-inside: avoid; // Firefox 1.5+
 129         break-inside: avoid-column; // IE 10+, Opera 11.1-12.1
 130 }
 131
 132 .flex-display( @display: flex ) {
 133         display: ~'-webkit-@{display}'; // iOS 6-, Safari 3.1-6
 134         display: ~'-moz-@{display}'; // Firefox 21-
 135         display: ~'-ms-@{display}box'; // IE 10
 136         display: @display;
 137 }
 138
 139 .flex-wrap( @wrap: wrap ) {
 140         -webkit-flex-wrap: @wrap; // iOS 6-, Safari 3.1-6
 141         -moz-flex-wrap: @wrap; // Firefox 21-
 142         -ms-flex-wrap: @wrap; // IE 10
 143         flex-wrap: @wrap;
 144 }
 145
 146 .flex( @grow: 1, @shrink: 1, @width: auto, @order: 1 ) {
 147         // For 2009/2012 spec alignment consistency with current default
 148         -webkit-box-pack: justify; // iOS 6-, Safari 3.1-6
 149         -moz-box-pack: justify; // Firefox 21-
 150         -ms-flex-pack: justify; // IE 10 (2012 spec)
 151         justify-content: space-between; // Current default
 152
 153         // 2009 spec only supports 'flexible' as opposed to grow (flexPositive)
 154         // and shrink (flexNegative); default to grow value
 155         -webkit-box-flex: @grow; // iOS 6-, Safari 3.1-6
 156         -moz-box-flex: @grow; // Firefox 21-
 157         width: @width; // Fallback for flex-basis
 158
 159         -ms-flex: @grow @shrink @width; // IE 10
 160         flex: @grow @shrink @width;
 161
 162         -webkit-box-ordinal-group: @order; // iOS 6-, Safari 3.1-6
 163         -moz-box-ordinal-group: @order; // Firefox 21-
 164         -ms-flex-order: @order; // IE 10
 165         order: @order;
 166 }
 167
 168 /* stylelint-disable selector-no-vendor-prefix, at-rule-no-unknown */
 169 .mixin-placeholder( @rules ) {
 170         // WebKit, Blink, Edge
 171         &::-webkit-input-placeholder {
 172                 @rules();
 173         }
 174         // Internet Explorer 10-11
 175         &:-ms-input-placeholder {
 176                 @rules();
 177         }
 178         // Firefox 19-
 179         &::-moz-placeholder {
 180                 @rules();
 181         }
 182         // Firefox 4-18
 183         &:-moz-placeholder {
 184                 @rules();
 185         }
 186         // W3C Standard Selectors Level 4
 187         &::placeholder {
 188                 @rules();
 189         }
 190 }
 191 /* stylelint-enable selector-no-vendor-prefix, at-rule-no-unknown */
 192
 193 // Screen Reader Helper Mixin
 194 .mixin-screen-reader-text() {
 195         display: block;
 196         position: absolute !important; /* stylelint-disable-line declaration-no-important */
 197         clip: rect( 1px, 1px, 1px, 1px );
 198         width: 1px;
 199         height: 1px;
 200         margin: -1px;
 201         border: 0;
 202         padding: 0;
 203         overflow: hidden;
 204 }