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<?php
/**
* SCSSPHP
*
* @copyright 2012-2015 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://leafo.github.io/scssphp
*/
namespace Leafo\ScssPhp;
use Leafo\ScssPhp\Base\Range;
/**
* SCSS utilties
*
* @author Anthon Pang <anthon.pang@gmail.com>
*/
class Util
{
/**
* Asserts that `value` falls within `range` (inclusive), leaving
* room for slight floating-point errors.
*
* @param string $name The name of the value. Used in the error message.
* @param Range $range Range of values.
* @param array $value The value to check.
* @param string $unit The unit of the value. Used in error reporting.
*
* @return mixed `value` adjusted to fall within range, if it was outside by a floating-point margin.
*
* @throws \Exception
*/
public static function checkRange($name, Range $range, $value, $unit = '')
{
$val = $value[1];
$grace = new Range(-0.00001, 0.00001);
if ($range->includes($val)) {
return $val;
}
if ($grace->includes($val - $range->first)) {
return $range->first;
}
if ($grace->includes($val - $range->last)) {
return $range->last;
}
throw new \Exception("$name {$val} must be between {$range->first} and {$range->last}$unit");
}
}
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