91 lines
2.8 KiB
SCSS
91 lines
2.8 KiB
SCSS
// Foundation for Sites by ZURB
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// foundation.zurb.com
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// Licensed under MIT Open Source
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////
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/// @group functions
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////
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$global-font-size: 100% !default;
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// scss-lint:disable ZeroUnit
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/// Removes the unit (e.g. px, em, rem) from a value, returning the number only.
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///
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/// @param {Number} $num - Number to strip unit from.
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///
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/// @returns {Number} The same number, sans unit.
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@function strip-unit($num) {
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@return $num / ($num * 0 + 1);
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}
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/// Converts one or more pixel values into matching rem values.
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///
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/// @param {Number|List} $values - One or more values to convert. Be sure to separate them with spaces and not commas. If you need to convert a comma-separated list, wrap the list in parentheses.
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/// @param {Number} $base [null] - The base value to use when calculating the `rem`. If you're using Foundation out of the box, this is 16px. If this parameter is `null`, the function will reference the `$base-font-size` variable as the base.
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///
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/// @returns {List} A list of converted values.
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@function rem-calc($values, $base: null) {
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$rem-values: ();
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$count: length($values);
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// If no base is defined, defer to the global font size
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@if $base == null {
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$base: $global-font-size;
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}
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// If the base font size is a %, then multiply it by 16px
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// This is because 100% font size = 16px in most all browsers
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@if unit($base) == '%' {
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$base: ($base / 100%) * 16px;
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}
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@if $count == 1 {
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@return -zf-to-rem($values, $base);
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}
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@for $i from 1 through $count {
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$rem-values: append($rem-values, -zf-to-rem(nth($values, $i), $base));
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}
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@return $rem-values;
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}
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// Converts a unitless, pixel, or rem value to em, for use in breakpoints.
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@function -zf-bp-to-em($value) {
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// Pixel and unitless values are converted to rems
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@if unit($value) == 'px' or unitless($value) {
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$value: rem-calc($value, $base: 16px);
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}
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// Then the value is converted to ems
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@return strip-unit($value) * 1em;
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}
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/// Converts a pixel value to matching rem value. *Any* value passed, regardless of unit, is assumed to be a pixel value. By default, the base pixel value used to calculate the rem value is taken from the `$global-font-size` variable.
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/// @access private
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///
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/// @param {Number} $value - Pixel value to convert.
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/// @param {Number} $base [null] - Base for pixel conversion.
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///
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/// @returns {Number} A number in rems, calculated based on the given value and the base pixel value. rem values are passed through as is.
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@function -zf-to-rem($value, $base: null) {
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// Check if the value is a number
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@if type-of($value) != 'number' {
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@warn inspect($value) + ' was passed to rem-calc(), which is not a number.';
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@return $value;
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}
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// Calculate rem if units for $value is not rem
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@if unit($value) != 'rem' {
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$value: strip-unit($value) / strip-unit($base) * 1rem;
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}
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// Turn 0rem into 0
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@if $value == 0rem {
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$value: 0;
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}
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@return $value;
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}
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