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<?php
/**
* Generic pre-transform that converts an attribute with a fixed number of
* values (enumerated) to CSS.
*/
class HTMLPurifier_AttrTransform_EnumToCSS extends HTMLPurifier_AttrTransform
{
/**
* Name of attribute to transform from.
* @type string
*/
protected $attr;
/**
* Lookup array of attribute values to CSS.
* @type array
*/
protected $enumToCSS = array();
/**
* Case sensitivity of the matching.
* @type bool
* @warning Currently can only be guaranteed to work with ASCII
* values.
*/
protected $caseSensitive = false;
/**
* @param string $attr Attribute name to transform from
* @param array $enum_to_css Lookup array of attribute values to CSS
* @param bool $case_sensitive Case sensitivity indicator, default false
*/
public function __construct($attr, $enum_to_css, $case_sensitive = false)
{
$this->attr = $attr;
$this->enumToCSS = $enum_to_css;
$this->caseSensitive = (bool)$case_sensitive;
}
/**
* @param array $attr
* @param HTMLPurifier_Config $config
* @param HTMLPurifier_Context $context
* @return array
*/
public function transform($attr, $config, $context)
{
if (!isset($attr[$this->attr])) {
return $attr;
}
$value = trim($attr[$this->attr]);
unset($attr[$this->attr]);
if (!$this->caseSensitive) {
$value = strtolower($value);
}
if (!isset($this->enumToCSS[$value])) {
return $attr;
}
$this->prependCSS($attr, $this->enumToCSS[$value]);
return $attr;
}
}
// vim: et sw=4 sts=4