Proyectos de Subversion Moodle

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1 efrain 1 
<?php
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/**
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 * Validates shorthand CSS property background.
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 * @warning Does not support url tokens that have internal spaces.
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 */
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class HTMLPurifier_AttrDef_CSS_Background extends HTMLPurifier_AttrDef
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{
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    /**
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     * Local copy of component validators.
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     * @type HTMLPurifier_AttrDef[]
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     * @note See HTMLPurifier_AttrDef_Font::$info for a similar impl.
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     */
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    protected $info;
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    /**
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     * @param HTMLPurifier_Config $config
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     */
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    public function __construct($config)
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    {
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        $def = $config->getCSSDefinition();
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        $this->info['background-color'] = $def->info['background-color'];
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        $this->info['background-image'] = $def->info['background-image'];
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        $this->info['background-repeat'] = $def->info['background-repeat'];
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        $this->info['background-attachment'] = $def->info['background-attachment'];
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        $this->info['background-position'] = $def->info['background-position'];
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        $this->info['background-size'] = $def->info['background-size'];
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    }
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    /**
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     * @param string $string
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     * @param HTMLPurifier_Config $config
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     * @param HTMLPurifier_Context $context
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     * @return bool|string
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     */
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    public function validate($string, $config, $context)
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    {
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        // regular pre-processing
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        $string = $this->parseCDATA($string);
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        if ($string === '') {
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            return false;
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        }
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        // munge rgb() decl if necessary
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        $string = $this->mungeRgb($string);
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        // assumes URI doesn't have spaces in it
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        $bits = explode(' ', $string); // bits to process
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        $caught = array();
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        $caught['color'] = false;
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        $caught['image'] = false;
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        $caught['repeat'] = false;
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        $caught['attachment'] = false;
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        $caught['position'] = false;
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        $caught['size'] = false;
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        $i = 0; // number of catches
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        foreach ($bits as $bit) {
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            if ($bit === '') {
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                continue;
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            }
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            foreach ($caught as $key => $status) {
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                if ($key != 'position') {
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                    if ($status !== false) {
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                        continue;
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                    }
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                    $r = $this->info['background-' . $key]->validate($bit, $config, $context);
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                } else {
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                    $r = $bit;
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                }
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                if ($r === false) {
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                    continue;
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                }
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                if ($key == 'position') {
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                    if ($caught[$key] === false) {
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                        $caught[$key] = '';
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                    }
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                    $caught[$key] .= $r . ' ';
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                } else {
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                    $caught[$key] = $r;
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                }
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                $i++;
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                break;
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            }
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        }
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        if (!$i) {
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            return false;
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        }
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        if ($caught['position'] !== false) {
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            $caught['position'] = $this->info['background-position']->
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                validate($caught['position'], $config, $context);
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        }
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        $ret = array();
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        foreach ($caught as $value) {
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            if ($value === false) {
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                continue;
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            }
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            $ret[] = $value;
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        }
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        if (empty($ret)) {
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            return false;
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        }
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        return implode(' ', $ret);
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    }
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}
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// vim: et sw=4 sts=4