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-gradient( linear, left top, left bottom, color-stop( @startPos, @startColor ), color-stop( @endPos, @endColor ) ); // Safari 4+, Chrome 2+
  25         background-image: -webkit-linear-gradient( top, @startColor @startPos, @endColor @endPos ); // Safari 5.1+, Chrome 10+
  26         background-image: -moz-linear-gradient( top, @startColor @startPos, @endColor @endPos ); // Firefox 3.6+
  27         background-image: linear-gradient( @startColor @startPos, @endColor @endPos ); // Standard
  28 }
  29
  30 // SVG support using a transparent gradient to guarantee cross-browser
  31 // compatibility (browsers able to understand gradient syntax support also SVG).
  32 // http://pauginer.tumblr.com/post/36614680636/invisible-gradient-technique
  33 //
  34 // We use gzip compression, which means that it is okay to embed twice.
  35 //
  36 // We do not embed the fallback image on the assumption that the gain for old browsers
  37 // is not worth the harm done to modern ones.
  38 .background-image-svg( @svg, @fallback ) {
  39         background-image: url( @fallback );
  40         background-image: linear-gradient( transparent, transparent ), e( '/* @embed */' ) url( @svg );
  41 }
  42
  43 // Shorthand for background-image-svg. Use if your PNG and SVG have the same name
  44 // and only if you cannot use ResourceLoaderImage module for some particular reason.
  45 .background-image-svg-quick( @url ) {
  46         .background-image-svg( ~'@{url}.svg', ~'@{url}.png' );
  47 }
  48
  49 .list-style-image( @url ) {
  50         list-style-image: e( '/* @embed */' ) url( @url );
  51 }
  52
  53 .list-style-image-svg( @svg, @fallback ) {
  54         list-style-image: e( '/* @embed */' ) url( @svg );
  55         /* Fallback to PNG bullet for IE 8 and below using CSS hack */
  56         list-style-image: e( '/* @embed */' ) url( @fallback ) e( '\9' );
  57 }
  58
  59 .hyphens( @value: auto ) {
  60         & when ( @value = auto ){
  61                 // Legacy `word-wrap`; IE 6-11, Edge 12+, Firefox 3.5+, Chrome 4+, Safari 3.1+,
  62                 //   Opera 11.5+, iOS 3.2+, Android 2.1+
  63                 // `overflow-wrap` is W3 standard, but it doesn't seem as if browser vendors
  64                 //   will abandon `word-wrap` (it has wider support), therefore no duplication.
  65                 word-wrap: break-word;
  66         }
  67         & when ( @value = none ) {
  68                 word-wrap: normal;
  69         }
  70
  71         // CSS3 hyphenation
  72         -webkit-hyphens: @value; // Safari 5.1+, iOS 4.3+
  73         -moz-hyphens: @value;    // Firefox 6-42
  74         -ms-hyphens: @value;     // IE 10-11, Edge 12+
  75         hyphens: @value;         // Firefox 43+, Chrome 55+, Android 62+, UC Browser 11.8+, Samsung 6.2+
  76 }
  77
  78 .transform( @value ) {
  79         -webkit-transform: @value; // Safari 3.1-8.0, iOS 3.2-8.4, Android 2.1-4.4.4
  80         -moz-transform: @value; // Firefox 3.5-15
  81         transform: @value; // Chrome 36+, Firefox 16+, IE 10+, Safari 9+, Opera 23+, iOS 9.2+, Android 5+
  82 }
  83
  84 .transition( @value ) {
  85         -webkit-transition: @value; // Safari 3.1-6.0, iOS 3.2-6.1, Android 2.1-4.3
  86         -moz-transition: @value; // Firefox 4-15
  87         transition: @value; // Chrome 26+, Firefox 16+, IE 10+, Safari 6.1+, Opera 12.1+, iOS 7+, Android 4.4+
  88 }
  89
  90 // Provide a hardware accelerated transform transition
  91 // We can't use `.transition()` because WebKit requires `-webkit-` prefix before `transform`
  92 // Example usage: `.transition-transform( 1s, opacity 2s );`
  93 // First parameter is additional options for `transform` transition commencing with
  94 // duration property @see https://www.w3.org/TR/css3-transitions/#transition-duration-property
  95 // and remaining parameters are additional transitions."
  96 .transition-transform( ... ) {
  97         -webkit-backface-visibility: hidden; // Older Webkit browsers: Promote element to a composite layer & involve the GPU
  98
  99         -webkit-transition: -webkit-transform @arguments; // Safari 3.1-8, iOS 3.2-8.4, Android 2.1-4.4.4
 100         -moz-transition: -moz-transform @arguments; // Firefox 4-15 for `-moz-transition`
 101         transition: transform @arguments; // Chrome 36+, Firefox 16+, IE 10+, Safari 9+, Opera 12.1+, iOS 9.2+, Android 36+
 102 }
 103
 104 .box-sizing( @value ) {
 105         -webkit-box-sizing: @value; // Safari 3.1-5.0, iOS 3.2-4.3, Android 2.1-3.0
 106         -moz-box-sizing: @value; // Firefox 4-28,
 107         box-sizing: @value; // Chrome 10+, Firefox 29+, IE 8+, Safari 5.1+, Opera 10+, iOS 5+, Android 4+
 108 }
 109
 110 .box-shadow( @value ) {
 111         -webkit-box-shadow: @value; // Safari 3.1-5.0, iOS 3.2-4.3, Android 2.1-3.0
 112         box-shadow: @value; // Chrome 10+, Firefox 4+, IE 9+, Safari 5.1+, Opera 11+, iOS 5+, Android 4+
 113 }
 114
 115 .column-count( @value ) {
 116         -webkit-column-count: @value;
 117         -moz-column-count: @value;
 118         column-count: @value;
 119 }
 120
 121 .column-width( @value ) {
 122         -webkit-column-width: @value; // Chrome Any, Safari 3+, Opera 15+
 123         -moz-column-width: @value; // Firefox 1.5+
 124         column-width: @value; // IE 10+, Opera 11.1-12.1
 125 }
 126
 127 .column-break-inside-avoid() {
 128         -webkit-column-break-inside: avoid; // Chrome Any, Safari 3+, Opera 15+
 129         page-break-inside: avoid; // Firefox 1.5+
 130         break-inside: avoid-column; // IE 10+, Opera 11.1-12.1
 131 }
 132
 133 .flex-display( @display: flex ) {
 134         display: ~'-webkit-@{display}'; // iOS 6-, Safari 3.1-6
 135         display: ~'-moz-@{display}'; // Firefox 21-
 136         display: ~'-ms-@{display}box'; // IE 10
 137         display: @display;
 138 }
 139
 140 .flex-wrap( @wrap: wrap ) {
 141         -webkit-flex-wrap: @wrap; // iOS 6-, Safari 3.1-6
 142         -moz-flex-wrap: @wrap; // Firefox 21-
 143         -ms-flex-wrap: @wrap; // IE 10
 144         flex-wrap: @wrap;
 145 }
 146
 147 .flex( @grow: 1, @shrink: 1, @width: auto, @order: 1 ) {
 148         // For 2009/2012 spec alignment consistency with current default
 149         -webkit-box-pack: justify; // iOS 6-, Safari 3.1-6
 150         -moz-box-pack: justify; // Firefox 21-
 151         -ms-flex-pack: justify; // IE 10 (2012 spec)
 152         justify-content: space-between; // Current default
 153
 154         // 2009 spec only supports 'flexible' as opposed to grow (flexPositive)
 155         // and shrink (flexNegative); default to grow value
 156         -webkit-box-flex: @grow; // iOS 6-, Safari 3.1-6
 157         -moz-box-flex: @grow; // Firefox 21-
 158         width: @width; // Fallback for flex-basis
 159
 160         -ms-flex: @grow @shrink @width; // IE 10
 161         flex: @grow @shrink @width;
 162
 163         -webkit-box-ordinal-group: @order; // iOS 6-, Safari 3.1-6
 164         -moz-box-ordinal-group: @order; // Firefox 21-
 165         -ms-flex-order: @order; // IE 10
 166         order: @order;
 167 }
 168
 169 /* stylelint-disable selector-no-vendor-prefix, at-rule-no-unknown */
 170 .mixin-placeholder( @rules ) {
 171         // WebKit, Blink, Edge
 172         &::-webkit-input-placeholder {
 173                 @rules();
 174         }
 175         // Internet Explorer 10-11
 176         &:-ms-input-placeholder {
 177                 @rules();
 178         }
 179         // Firefox 19-
 180         &::-moz-placeholder {
 181                 @rules();
 182         }
 183         // Firefox 4-18
 184         &:-moz-placeholder {
 185                 @rules();
 186         }
 187         // W3C Standard Selectors Level 4
 188         &::placeholder {
 189                 @rules();
 190         }
 191 }
 192 /* stylelint-enable selector-no-vendor-prefix, at-rule-no-unknown */
 193
 194 // Screen Reader Helper Mixin
 195 .mixin-screen-reader-text() {
 196         display: block;
 197         position: absolute !important; /* stylelint-disable-line declaration-no-important */
 198         clip: rect( 1px, 1px, 1px, 1px );
 199         width: 1px;
 200         height: 1px;
 201         margin: -1px;
 202         border: 0;
 203         padding: 0;
 204         overflow: hidden;
 205 }