sp-magic.de/bower_components/foundation-sites/scss/util/_unit.scss

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2016-10-28 17:56:41 +00:00
// Foundation for Sites by ZURB
// foundation.zurb.com
// Licensed under MIT Open Source
////
/// @group functions
////
$global-font-size: 100% !default;
// scss-lint:disable ZeroUnit
/// Removes the unit (e.g. px, em, rem) from a value, returning the number only.
///
/// @param {Number} $num - Number to strip unit from.
///
/// @returns {Number} The same number, sans unit.
@function strip-unit($num) {
@return $num / ($num * 0 + 1);
}
/// Converts one or more pixel values into matching rem values.
///
/// @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.
/// @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.
///
/// @returns {List} A list of converted values.
@function rem-calc($values, $base: null) {
$rem-values: ();
$count: length($values);
// If no base is defined, defer to the global font size
@if $base == null {
$base: $global-font-size;
}
// If the base font size is a %, then multiply it by 16px
// This is because 100% font size = 16px in most all browsers
@if unit($base) == '%' {
$base: ($base / 100%) * 16px;
}
@if $count == 1 {
@return -zf-to-rem($values, $base);
}
@for $i from 1 through $count {
$rem-values: append($rem-values, -zf-to-rem(nth($values, $i), $base));
}
@return $rem-values;
}
// Converts a unitless, pixel, or rem value to em, for use in breakpoints.
@function -zf-bp-to-em($value) {
// Pixel and unitless values are converted to rems
@if unit($value) == 'px' or unitless($value) {
$value: rem-calc($value, $base: 16px);
}
// Then the value is converted to ems
@return strip-unit($value) * 1em;
}
/// 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.
/// @access private
///
/// @param {Number} $value - Pixel value to convert.
/// @param {Number} $base [null] - Base for pixel conversion.
///
/// @returns {Number} A number in rems, calculated based on the given value and the base pixel value. rem values are passed through as is.
@function -zf-to-rem($value, $base: null) {
// Check if the value is a number
@if type-of($value) != 'number' {
@warn inspect($value) + ' was passed to rem-calc(), which is not a number.';
@return $value;
}
// Calculate rem if units for $value is not rem
@if unit($value) != 'rem' {
$value: strip-unit($value) / strip-unit($base) * 1rem;
}
// Turn 0rem into 0
@if $value == 0rem {
$value: 0;
}
@return $value;
}