mirror of
https://github.com/twbs/bootstrap.git
synced 2024-11-29 11:24:18 +01:00
117 lines
3.5 KiB
SCSS
117 lines
3.5 KiB
SCSS
// Bootstrap functions
|
|
//
|
|
// Utility mixins and functions for evaluating source code across our variables, maps, and mixins.
|
|
|
|
// Ascending
|
|
// Used to evaluate Sass maps like our grid breakpoints.
|
|
@mixin _assert-ascending($map, $map-name) {
|
|
$prev-key: null;
|
|
$prev-num: null;
|
|
@each $key, $num in $map {
|
|
@if $prev-num == null or unit($num) == "%" or unit($prev-num) == "%" {
|
|
// Do nothing
|
|
} @else if not comparable($prev-num, $num) {
|
|
@warn "Potentially invalid value for #{$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}' !";
|
|
} @else if $prev-num >= $num {
|
|
@warn "Invalid value for #{$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}' !";
|
|
}
|
|
$prev-key: $key;
|
|
$prev-num: $num;
|
|
}
|
|
}
|
|
|
|
// Starts at zero
|
|
// Used to ensure the min-width of the lowest breakpoint starts at 0.
|
|
@mixin _assert-starts-at-zero($map, $map-name: "$grid-breakpoints") {
|
|
$values: map-values($map);
|
|
$first-value: nth($values, 1);
|
|
@if $first-value != 0 {
|
|
@warn "First breakpoint in #{$map-name} must start at 0, but starts at #{$first-value}.";
|
|
}
|
|
}
|
|
|
|
// Internal Bootstrap function to turn maps into its negative variant.
|
|
// It prefixes the keys with `n` and makes the value negative.
|
|
@function negativify-map($map) {
|
|
$result: ();
|
|
@each $key, $value in $map {
|
|
@if $key != 0 {
|
|
$result: map-merge($result, ("n" + $key: (-$value)));
|
|
}
|
|
}
|
|
@return $result;
|
|
}
|
|
|
|
// Get multiple keys from a sass map
|
|
@function map-get-multiple($map, $values) {
|
|
$result: ();
|
|
@each $key, $value in $map {
|
|
@if (index($values, $key) != null) {
|
|
$result: map-merge($result, ($key: $value));
|
|
}
|
|
}
|
|
@return $map;
|
|
}
|
|
|
|
// Replace `$search` with `$replace` in `$string`
|
|
// Used on our SVG icon backgrounds for custom forms.
|
|
//
|
|
// @author Hugo Giraudel
|
|
// @param {String} $string - Initial string
|
|
// @param {String} $search - Substring to replace
|
|
// @param {String} $replace ('') - New value
|
|
// @return {String} - Updated string
|
|
@function str-replace($string, $search, $replace: "") {
|
|
$index: str-index($string, $search);
|
|
|
|
@if $index {
|
|
@return str-slice($string, 1, $index - 1) + $replace + str-replace(str-slice($string, $index + str-length($search)), $search, $replace);
|
|
}
|
|
|
|
@return $string;
|
|
}
|
|
|
|
// See https://codepen.io/kevinweber/pen/dXWoRw
|
|
@function escape-svg($string) {
|
|
@if str-index($string, "data:image/svg+xml") {
|
|
@each $char, $encoded in $escaped-characters {
|
|
$string: str-replace($string, $char, $encoded);
|
|
}
|
|
}
|
|
|
|
@return $string;
|
|
}
|
|
|
|
// Color contrast
|
|
@function color-yiq($color, $dark: $yiq-text-dark, $light: $yiq-text-light) {
|
|
$r: red($color);
|
|
$g: green($color);
|
|
$b: blue($color);
|
|
|
|
$yiq: (($r * 299) + ($g * 587) + ($b * 114)) / 1000;
|
|
|
|
@return if($yiq >= $yiq-contrasted-threshold, $dark, $light);
|
|
}
|
|
|
|
// Retrieve color Sass maps
|
|
@function color($key: "blue") {
|
|
@return map-get($colors, $key);
|
|
}
|
|
|
|
@function theme-color($key: "primary") {
|
|
@return map-get($theme-colors, $key);
|
|
}
|
|
|
|
@function gray($key: "100") {
|
|
@return map-get($grays, $key);
|
|
}
|
|
|
|
// Request a theme color level
|
|
@function theme-color-level($color-name: "primary", $level: 0) {
|
|
$color: theme-color($color-name);
|
|
$color-base: if($level > 0, $black, $white);
|
|
$level: abs($level);
|
|
|
|
@return mix($color-base, $color, $level * $theme-color-interval);
|
|
}
|