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efrain |
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<?php
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// Enum = Enumerated
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/**
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* Validates a keyword against a list of valid values.
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* @warning The case-insensitive compare of this function uses PHP's
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* built-in strtolower and ctype_lower functions, which may
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* cause problems with international comparisons
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*/
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class HTMLPurifier_AttrDef_Enum extends HTMLPurifier_AttrDef
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{
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/**
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* Lookup table of valid values.
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* @type array
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* @todo Make protected
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*/
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public $valid_values = array();
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/**
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* Bool indicating whether or not enumeration is case sensitive.
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* @note In general this is always case insensitive.
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*/
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protected $case_sensitive = false; // values according to W3C spec
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/**
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* @param array $valid_values List of valid values
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* @param bool $case_sensitive Whether or not case sensitive
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*/
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public function __construct($valid_values = array(), $case_sensitive = false)
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{
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$this->valid_values = array_flip($valid_values);
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$this->case_sensitive = $case_sensitive;
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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, $context)
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{
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$string = trim($string);
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if (!$this->case_sensitive) {
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// we may want to do full case-insensitive libraries
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$string = ctype_lower($string) ? $string : strtolower($string);
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}
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$result = isset($this->valid_values[$string]);
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return $result ? $string : false;
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}
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/**
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* @param string $string In form of comma-delimited list of case-insensitive
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* valid values. Example: "foo,bar,baz". Prepend "s:" to make
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* case sensitive
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* @return HTMLPurifier_AttrDef_Enum
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*/
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public function make($string)
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{
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if (strlen($string) > 2 && $string[0] == 's' && $string[1] == ':') {
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$string = substr($string, 2);
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$sensitive = true;
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} else {
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$sensitive = false;
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}
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$values = explode(',', $string);
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return new HTMLPurifier_AttrDef_Enum($values, $sensitive);
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}
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}
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// vim: et sw=4 sts=4
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