Proyectos de Subversion Moodle

<?php

/**

 * SCSSPHP

 *

 * @copyright 2012-2020 Leaf Corcoran

 *

 * @license http://opensource.org/licenses/MIT MIT

 *

 * @link http://scssphp.github.io/scssphp

 */

namespace ScssPhp\ScssPhp;

use ScssPhp\ScssPhp\Base\Range;

use ScssPhp\ScssPhp\Exception\RangeException;

use ScssPhp\ScssPhp\Node\Number;

/**

 * Utility functions

 *

 * @author Anthon Pang <anthon.pang@gmail.com>

 *

 * @internal

 */

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|Number $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 \ScssPhp\ScssPhp\Exception\RangeException

     */

    public static function checkRange($name, Range $range, $value, $unit = '')

    {

        $val = $value[1];

        $grace = new Range(-0.00001, 0.00001);

        if (! \is_numeric($val)) {

            throw new RangeException("$name {$val} is not a number.");

        }

        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 RangeException("$name {$val} must be between {$range->first} and {$range->last}$unit");

    }

    /**

     * Encode URI component

     *

     * @param string $string

     *

     * @return string

     */

    public static function encodeURIComponent($string)

    {

        $revert = ['%21' => '!', '%2A' => '*', '%27' => "'", '%28' => '(', '%29' => ')'];

        return strtr(rawurlencode($string), $revert);

    }

    /**

     * mb_chr() wrapper

     *

     * @param int $code

     *

     * @return string

     */

    public static function mbChr($code)

    {

        // Use the native implementation if available, but not on PHP 7.2 as mb_chr(0) is buggy there

        if (\PHP_VERSION_ID > 70300 && \function_exists('mb_chr')) {

            return mb_chr($code, 'UTF-8');

        }

        if (0x80 > $code %= 0x200000) {

            $s = \chr($code);

        } elseif (0x800 > $code) {

            $s = \chr(0xC0 | $code >> 6) . \chr(0x80 | $code & 0x3F);

        } elseif (0x10000 > $code) {

            $s = \chr(0xE0 | $code >> 12) . \chr(0x80 | $code >> 6 & 0x3F) . \chr(0x80 | $code & 0x3F);

        } else {

            $s = \chr(0xF0 | $code >> 18) . \chr(0x80 | $code >> 12 & 0x3F)

                . \chr(0x80 | $code >> 6 & 0x3F) . \chr(0x80 | $code & 0x3F);

        }

        return $s;

    }

    /**

     * mb_strlen() wrapper

     *

     * @param string $string

     * @return int

     */

    public static function mbStrlen($string)

    {

        // Use the native implementation if available.

        if (\function_exists('mb_strlen')) {

            return mb_strlen($string, 'UTF-8');

        }

        if (\function_exists('iconv_strlen')) {

            return (int) @iconv_strlen($string, 'UTF-8');

        }

        throw new \LogicException('Either mbstring (recommended) or iconv is necessary to use Scssphp.');

    }

    /**

     * mb_substr() wrapper

     * @param string $string

     * @param int $start

     * @param null|int $length

     * @return string

     */

    public static function mbSubstr($string, $start, $length = null)

    {

        // Use the native implementation if available.

        if (\function_exists('mb_substr')) {

            return mb_substr($string, $start, $length, 'UTF-8');

        }

        if (\function_exists('iconv_substr')) {

            if ($start < 0) {

                $start = static::mbStrlen($string) + $start;

                if ($start < 0) {

                    $start = 0;

                }

            }

            if (null === $length) {

                $length = 2147483647;

            } elseif ($length < 0) {

                $length = static::mbStrlen($string) + $length - $start;

                if ($length < 0) {

                    return '';

                }

            }

            return (string)iconv_substr($string, $start, $length, 'UTF-8');

        }

        throw new \LogicException('Either mbstring (recommended) or iconv is necessary to use Scssphp.');

    }

    /**

     * mb_strpos wrapper

     * @param string $haystack

     * @param string $needle

     * @param int $offset

     *

     * @return int|false

     */

    public static function mbStrpos($haystack, $needle, $offset = 0)

    {

        if (\function_exists('mb_strpos')) {

            return mb_strpos($haystack, $needle, $offset, 'UTF-8');

        }

        if (\function_exists('iconv_strpos')) {

            return iconv_strpos($haystack, $needle, $offset, 'UTF-8');

        }

        throw new \LogicException('Either mbstring (recommended) or iconv is necessary to use Scssphp.');

    }

}