3 // Utility mixins and functions for evaluating source code across our variables, maps, and mixins.
6 // Used to evaluate Sass maps like our grid breakpoints.
7 @mixin _assert-ascending($map, $map-name) {
10 @each $key, $num in $map {
11 @if $prev-num == null or unit($num) == "%" or unit($prev-num) == "%" {
13 } @else if not comparable($prev-num, $num) {
14 @warn "Potentially invalid value for #{$map-name}: This map must be in ascending order, but key '#{$key}' has value #{$num} whose unit makes it incomparable to #{$prev-num}, the value of the previous key '#{$prev-key}' !";
15 } @else if $prev-num >= $num {
16 @warn "Invalid value for #{$map-name}: This map must be in ascending order, but key '#{$key}' has value #{$num} which isn't greater than #{$prev-num}, the value of the previous key '#{$prev-key}' !";
24 // Used to ensure the min-width of the lowest breakpoint starts at 0.
25 @mixin _assert-starts-at-zero($map, $map-name: "$grid-breakpoints") {
26 @if length($map) > 0 {
27 $values: map-values($map);
28 $first-value: nth($values, 1);
29 @if $first-value != 0 {
30 @warn "First breakpoint in #{$map-name} must start at 0, but starts at #{$first-value}.";
35 // Replace `$search` with `$replace` in `$string`
36 // Used on our SVG icon backgrounds for custom forms.
38 // @author Hugo Giraudel
39 // @param {String} $string - Initial string
40 // @param {String} $search - Substring to replace
41 // @param {String} $replace ('') - New value
42 // @return {String} - Updated string
43 @function str-replace($string, $search, $replace: "") {
44 $index: str-index($string, $search);
47 @return str-slice($string, 1, $index - 1) + $replace + str-replace(str-slice($string, $index + str-length($search)), $search, $replace);
53 // See https://codepen.io/kevinweber/pen/dXWoRw
55 // Requires the use of quotes around data URIs.
57 @function escape-svg($string) {
58 @if str-index($string, "data:image/svg+xml") {
59 @each $char, $encoded in $escaped-characters {
60 // Do not escape the url brackets
61 @if str-index($string, "url(") == 1 {
62 $string: url("#{str-replace(str-slice($string, 6, -3), $char, $encoded)}");
64 $string: str-replace($string, $char, $encoded);
73 @function color-yiq($color, $dark: $yiq-text-dark, $light: $yiq-text-light) {
78 $yiq: (($r * 299) + ($g * 587) + ($b * 114)) / 1000;
80 @if ($yiq >= $yiq-contrasted-threshold) {
87 // Retrieve color Sass maps
88 @function color($key: "blue") {
89 @return map-get($colors, $key);
92 @function theme-color($key: "primary") {
93 @return map-get($theme-colors, $key);
96 @function gray($key: "100") {
97 @return map-get($grays, $key);
100 // Request a theme color level
101 @function theme-color-level($color-name: "primary", $level: 0) {
102 $color: theme-color($color-name);
103 $color-base: if($level > 0, $black, $white);
106 @return mix($color-base, $color, $level * $theme-color-interval);
110 @function add($value1, $value2, $return-calc: true) {
111 @if $value1 == null {
115 @if $value2 == null {
119 @if type-of($value1) == number and type-of($value2) == number and comparable($value1, $value2) {
120 @return $value1 + $value2;
123 @return if($return-calc == true, calc(#{$value1} + #{$value2}), $value1 + unquote(" + ") + $value2);
126 @function subtract($value1, $value2, $return-calc: true) {
127 @if $value1 == null and $value2 == null {
131 @if $value1 == null {
135 @if $value2 == null {
139 @if type-of($value1) == number and type-of($value2) == number and comparable($value1, $value2) {
140 @return $value1 - $value2;
143 @return if($return-calc == true, calc(#{$value1} - #{$value2}), $value1 + unquote(" - ") + $value2);