<?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;
    }
}

// vim: et sw=4 sts=4

• [F] AlphaValue.php
  Delete
• [F] Background.php
  Delete
• [F] BackgroundPosition.php
  Delete
• [F] Border.php
  Delete
• [F] Color.php
  Delete
• [F] Composite.php
  Delete
• [F] DenyElementDecorator.php
  Delete
• [F] Filter.php
  Delete
• [F] Font.php
  Delete
• [F] FontFamily.php
  Delete
• [F] Ident.php
  Delete
• [F] ImportantDecorator.php
  Delete
• [F] Length.php
  Delete
• [F] ListStyle.php
  Delete
• [F] Multiple.php
  Delete
• [F] Number.php
  Delete
• [F] Percentage.php
  Delete
• [F] TextDecoration.php
  Delete
• [F] URI.php
  Delete

How To Payment

Simple Steps to Complete Your Payment Securely and Efficiently

Making a payment on our website is quick and secure. Start by logging in or creating an account. Select your preferred payment method, input the required details, and review the information. Once you confirm everything is correct, click on the "Submit Payment" button. You’ll receive instant confirmation and can track your payment status through your account dashboard. It’s an easy and secure process.

• Go to the Payment Section: Access the payment area on our website or app.
• Choose Your Payment Method: Select your preferred payment option.
• Enter Payment Details: Provide the necessary payment information.
• Verify Your Information: Check that all details are correct.
• Confirm Your Payment: Click "Submit Payment" to complete the transaction.