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         // Do not serve SVG to Opera 12, bad rendering with border-radius or background-size (T87504)
  42         background-image: -o-linear-gradient( transparent, transparent ), url( @fallback );
  43 }
  44
  45 .list-style-image( @url ) {
  46         list-style-image: e( '/* @embed */' ) url( @url );
  47 }
  48
  49 .list-style-image-svg( @svg, @fallback ) {
  50         list-style-image: e( '/* @embed */' ) url( @svg );
  51         /* Fallback to PNG bullet for IE 8 and below using CSS hack */
  52         list-style-image: e( '/* @embed */' ) url( @fallback ) e( '\9' );
  53 }
  54
  55 .transition( @value ) {
  56         -webkit-transition: @value; // Safari 3.1-6.0, iOS 3.2-6.1, Android 2.1-4.3
  57         -moz-transition: @value; // Firefox 4-15
  58         transition: @value; // Chrome 26+, Firefox 16+, IE 10+, Safari 6.1+, Opera 12.1+, iOS 7+, Android 4.4+
  59 }
  60
  61 // Provide a hardware accelerated transform transition
  62 // We can't use `.transition()` because WebKit requires `-webkit-` prefix before `transform`
  63 // Example usage: `.transition-transform( 1s, opacity 2s );`
  64 // First parameter is additional options for `transform` transition commencing with
  65 // duration property @see https://www.w3.org/TR/css3-transitions/#transition-duration-property
  66 // and remaining parameters are additional transitions."
  67 .transition-transform( ... ) {
  68         -webkit-backface-visibility: hidden; // Older Webkit browsers: Promote element to a composite layer & involve the GPU
  69
  70         -webkit-transition: -webkit-transform @arguments; // Safari 3.1-8, iOS 3.2-8.4, Android 2.1-4.4.4
  71         -moz-transition: -moz-transform @arguments; // Firefox 4-15 for `-moz-transition`
  72         transition: transform @arguments; // Chrome 36+, Firefox 16+, IE 10+, Safari 9+, Opera 12.1+, iOS 9.2+, Android 36+
  73 }
  74
  75 .box-sizing( @value ) {
  76         -webkit-box-sizing: @value; // Safari 3.1-5.0, iOS 3.2-4.3, Android 2.1-3.0
  77         -moz-box-sizing: @value; // Firefox 4-28,
  78         box-sizing: @value; // Chrome 10+, Firefox 29+, IE 8+, Safari 5.1+, Opera 10+, iOS 5+, Android 4+
  79 }
  80
  81 .box-shadow( @value ) {
  82         -webkit-box-shadow: @value; // Safari 3.1-5.0, iOS 3.2-4.3, Android 2.1-3.0
  83         box-shadow: @value; // Chrome 10+, Firefox 4+, IE 9+, Safari 5.1+, Opera 11+, iOS 5+, Android 4+
  84 }
  85
  86 .column-count( @value ) {
  87         -webkit-column-count: @value;
  88         -moz-column-count: @value;
  89         column-count: @value;
  90 }
  91
  92 .column-width( @value ) {
  93         -webkit-column-width: @value; // Chrome Any, Safari 3+, Opera 15+
  94         -moz-column-width: @value; // Firefox 1.5+
  95         column-width: @value; // IE 10+, Opera 11.1-12.1
  96 }
  97
  98 .column-break-inside-avoid() {
  99         -webkit-column-break-inside: avoid; // Chrome Any, Safari 3+, Opera 15+
 100         page-break-inside: avoid; // Firefox 1.5+
 101         break-inside: avoid-column; // IE 10+, Opera 11.1-12.1
 102 }
 103
 104 .flex-display( @display: flex ) {
 105         display: ~'-webkit-@{display}'; // iOS 6-, Safari 3.1-6
 106         display: ~'-moz-@{display}'; // Firefox 21-
 107         display: ~'-ms-@{display}box'; // IE 10
 108         display: @display;
 109 }
 110
 111 .flex-wrap( @wrap: wrap ) {
 112         -webkit-flex-wrap: @wrap; // iOS 6-, Safari 3.1-6
 113         -moz-flex-wrap: @wrap; // Firefox 21-
 114         -ms-flex-wrap: @wrap; // IE 10
 115         flex-wrap: @wrap;
 116 }
 117
 118 .flex( @grow: 1, @shrink: 1, @width: auto, @order: 1 ) {
 119         // For 2009/2012 spec alignment consistency with current default
 120         -webkit-box-pack: justify; // iOS 6-, Safari 3.1-6
 121         -moz-box-pack: justify; // Firefox 21-
 122         -ms-flex-pack: justify; // IE 10 (2012 spec)
 123         justify-content: space-between; // Current default
 124
 125         // 2009 spec only supports 'flexible' as opposed to grow (flexPositive)
 126         // and shrink (flexNegative); default to grow value
 127         -webkit-box-flex: @grow; // iOS 6-, Safari 3.1-6
 128         -moz-box-flex: @grow; // Firefox 21-
 129         width: @width; // Fallback for flex-basis
 130
 131         -ms-flex: @grow @shrink @width; // IE 10
 132         flex: @grow @shrink @width;
 133
 134         -webkit-box-ordinal-group: @order; // iOS 6-, Safari 3.1-6
 135         -moz-box-ordinal-group: @order; // Firefox 21-
 136         -ms-flex-order: @order; // IE 10
 137         order: @order;
 138 }
 139
 140 /* stylelint-disable selector-no-vendor-prefix, at-rule-no-unknown */
 141 .mixin-placeholder( @rules ) {
 142         // WebKit, Blink, Edge
 143         &::-webkit-input-placeholder {
 144                 @rules();
 145         }
 146         // Internet Explorer 10-11
 147         &:-ms-input-placeholder {
 148                 @rules();
 149         }
 150         // Firefox 19-
 151         &::-moz-placeholder {
 152                 @rules();
 153         }
 154         // Firefox 4-18
 155         &:-moz-placeholder {
 156                 @rules();
 157         }
 158         // W3C Standard Selectors Level 4
 159         &::placeholder {
 160                 @rules();
 161         }
 162         // For inputs that use jquery.placeholder.js e.g. IE9
 163         &.placeholder {
 164                 @rules();
 165         }
 166 }
 167 /* stylelint-enable selector-no-vendor-prefix, at-rule-no-unknown */
 168
 169 // Screen Reader Helper Mixin
 170 .mixin-screen-reader-text() {
 171         display: block;
 172         position: absolute !important; /* stylelint-disable-line declaration-no-important */
 173         clip: rect( 1px, 1px, 1px, 1px );
 174         width: 1px;
 175         height: 1px;
 176         margin: -1px;
 177         border: 0;
 178         padding: 0;
 179         overflow: hidden;
 180 }