<?php

/**
 * Microsoft's proprietary filter: CSS property
 * @note Currently supports the alpha filter. In the future, this will
 *       probably need an extensible framework
 */
class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef
{
    /** @type HTMLPurifier_AttrDef_Integer */
    protected $intValidator;

    public function __construct()
    {
        $this->intValidator = new HTMLPurifier_AttrDef_Integer();
    }

    /**
     * @param string $value
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return bool|string
     */
    public function validate($value, $config, $context)
    {
        $value = $this->parseCDATA($value);
        if ($value === 'none') {
            return $value;
        }
        // if we looped this we could support multiple filters
        $function_length = strcspn($value, '(');
        $function = trim(substr($value, 0, $function_length));
        if ($function !== 'alpha' &&
            $function !== 'Alpha' &&
            $function !== 'progid:DXImageTransform.Microsoft.Alpha'
        ) {
            return false;
        }
        $cursor = $function_length + 1;
        $parameters_length = strcspn($value, ')', $cursor);
        $parameters = substr($value, $cursor, $parameters_length);
        $params = explode(',', $parameters);
        $ret_params = array();
        $lookup = array();
        foreach ($params as $param) {
            list($key, $value) = explode('=', $param);
            $key = trim($key);
            $value = trim($value);
            if (isset($lookup[$key])) {
                continue;
            }
            if ($key !== 'opacity') {
                continue;
            }
            $value = $this->intValidator->validate($value, $config, $context);
            if ($value === false) {
                continue;
            }
            $int = (int)$value;
            if ($int > 100) {
                $value = '100';
            }
            if ($int < 0) {
                $value = '0';
            }
            $ret_params[] = "$key=$value";
            $lookup[$key] = true;
        }
        $ret_parameters = implode(',', $ret_params);
        $ret_function = "$function($ret_parameters)";
        return $ret_function;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MTMyNjA0ODQzMTQ4NzcxNCA3ODgyNzI3MTUxNjk1MjU5IDU3NTkwMTkwMTkyMTI5Mzc=