112 lines
3.1 KiB
PHP
112 lines
3.1 KiB
PHP
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<?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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}
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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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$caught['position'] = false;
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$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
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