website/assets/sass/bourbon/addons/_directional-values.scss

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2015-08-30 12:34:43 -04:00
// directional-property mixins are shorthands
// for writing properties like the following
//
// @include margin(null 0 10px);
// ------
// margin-right: 0;
// margin-bottom: 10px;
// margin-left: 0;
//
// - or -
//
// @include border-style(dotted null);
// ------
// border-top-style: dotted;
// border-bottom-style: dotted;
//
// ------
//
// Note: You can also use false instead of null
@function collapse-directionals($vals) {
$output: null;
$A: nth( $vals, 1 );
$B: if( length($vals) < 2, $A, nth($vals, 2));
$C: if( length($vals) < 3, $A, nth($vals, 3));
$D: if( length($vals) < 2, $A, nth($vals, if( length($vals) < 4, 2, 4) ));
@if $A == 0 { $A: 0 }
@if $B == 0 { $B: 0 }
@if $C == 0 { $C: 0 }
@if $D == 0 { $D: 0 }
@if $A == $B and $A == $C and $A == $D { $output: $A }
@else if $A == $C and $B == $D { $output: $A $B }
@else if $B == $D { $output: $A $B $C }
@else { $output: $A $B $C $D }
@return $output;
}
@function contains-falsy($list) {
@each $item in $list {
@if not $item {
@return true;
}
}
@return false;
}
@mixin directional-property($pre, $suf, $vals) {
// Property Names
$top: $pre + "-top" + if($suf, "-#{$suf}", "");
$bottom: $pre + "-bottom" + if($suf, "-#{$suf}", "");
$left: $pre + "-left" + if($suf, "-#{$suf}", "");
$right: $pre + "-right" + if($suf, "-#{$suf}", "");
$all: $pre + if($suf, "-#{$suf}", "");
$vals: collapse-directionals($vals);
@if contains-falsy($vals) {
@if nth($vals, 1) { #{$top}: nth($vals, 1); }
@if length($vals) == 1 {
@if nth($vals, 1) { #{$right}: nth($vals, 1); }
} @else {
@if nth($vals, 2) { #{$right}: nth($vals, 2); }
}
// prop: top/bottom right/left
@if length($vals) == 2 {
@if nth($vals, 1) { #{$bottom}: nth($vals, 1); }
@if nth($vals, 2) { #{$left}: nth($vals, 2); }
// prop: top right/left bottom
} @else if length($vals) == 3 {
@if nth($vals, 3) { #{$bottom}: nth($vals, 3); }
@if nth($vals, 2) { #{$left}: nth($vals, 2); }
// prop: top right bottom left
} @else if length($vals) == 4 {
@if nth($vals, 3) { #{$bottom}: nth($vals, 3); }
@if nth($vals, 4) { #{$left}: nth($vals, 4); }
}
// prop: top/right/bottom/left
} @else {
#{$all}: $vals;
}
}
@mixin margin($vals...) {
@include directional-property(margin, false, $vals...);
}
@mixin padding($vals...) {
@include directional-property(padding, false, $vals...);
}
@mixin border-style($vals...) {
@include directional-property(border, style, $vals...);
}
@mixin border-color($vals...) {
@include directional-property(border, color, $vals...);
}
@mixin border-width($vals...) {
@include directional-property(border, width, $vals...);
}