<?php

/**
 * Validates a number as defined by the CSS spec.
 */
class HTMLPurifier_AttrDef_CSS_Number extends HTMLPurifier_AttrDef
{
    /**
     * Indicates whether or not only positive values are allowed.
     * @type bool
     */
    protected $non_negative = false;

    /**
     * @param bool $non_negative indicates whether negatives are forbidden
     */
    public function __construct($non_negative = false)
    {
        $this->non_negative = $non_negative;
    }

    /**
     * @param string $number
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return string|bool
     * @warning Some contexts do not pass $config, $context. These
     *          variables should not be used without checking HTMLPurifier_Length
     */
    public function validate($number, $config, $context)
    {
        $number = $this->parseCDATA($number);

        if ($number === '') {
            return false;
        }
        if ($number === '0') {
            return '0';
        }

        $sign = '';
        switch ($number[0]) {
            case '-':
                if ($this->non_negative) {
                    return false;
                }
                $sign = '-';
            case '+':
                $number = substr($number, 1);
        }

        if (ctype_digit($number)) {
            $number = ltrim($number, '0');
            return $number ? $sign . $number : '0';
        }

        // Period is the only non-numeric character allowed
        if (strpos($number, '.') === false) {
            return false;
        }

        list($left, $right) = explode('.', $number, 2);

        if ($left === '' && $right === '') {
            return false;
        }
        if ($left !== '' && !ctype_digit($left)) {
            return false;
        }

        // Remove leading zeros until positive number or a zero stays left
        if (ltrim($left, '0') != '') {
            $left = ltrim($left, '0');
        } else {
            $left = '0';
        }

        $right = rtrim($right, '0');

        if ($right === '') {
            return $left ? $sign . $left : '0';
        } elseif (!ctype_digit($right)) {
            return false;
        }
        return $sign . $left . '.' . $right;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----Mjk1MjgwNjE0Mzc3MzYyOSA1NjQ2MDAzNjQ3MzEyNTgzIDI0MzU1NjgwOTA3MjY2MjE=