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