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-rw-r--r-- | vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Integer.php | 91 |
diff --git a/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Integer.php b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Integer.php new file mode 100644 index 0000000..400e707 --- /dev/null +++ b/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/Integer.php @@ -0,0 +1,91 @@ +<?php + +/** + * Validates an integer. + * @note While this class was modeled off the CSS definition, no currently + * allowed CSS uses this type. The properties that do are: widows, + * orphans, z-index, counter-increment, counter-reset. Some of the + * HTML attributes, however, find use for a non-negative version of this. + */ +class HTMLPurifier_AttrDef_Integer extends HTMLPurifier_AttrDef +{ + + /** + * Whether or not negative values are allowed. + * @type bool + */ + protected $negative = true; + + /** + * Whether or not zero is allowed. + * @type bool + */ + protected $zero = true; + + /** + * Whether or not positive values are allowed. + * @type bool + */ + protected $positive = true; + + /** + * @param $negative Bool indicating whether or not negative values are allowed + * @param $zero Bool indicating whether or not zero is allowed + * @param $positive Bool indicating whether or not positive values are allowed + */ + public function __construct($negative = true, $zero = true, $positive = true) + { + $this->negative = $negative; + $this->zero = $zero; + $this->positive = $positive; + } + + /** + * @param string $integer + * @param HTMLPurifier_Config $config + * @param HTMLPurifier_Context $context + * @return bool|string + */ + public function validate($integer, $config, $context) + { + $integer = $this->parseCDATA($integer); + if ($integer === '') { + return false; + } + + // we could possibly simply typecast it to integer, but there are + // certain fringe cases that must not return an integer. + + // clip leading sign + if ($this->negative && $integer[0] === '-') { + $digits = substr($integer, 1); + if ($digits === '0') { + $integer = '0'; + } // rm minus sign for zero + } elseif ($this->positive && $integer[0] === '+') { + $digits = $integer = substr($integer, 1); // rm unnecessary plus + } else { + $digits = $integer; + } + + // test if it's numeric + if (!ctype_digit($digits)) { + return false; + } + + // perform scope tests + if (!$this->zero && $integer == 0) { + return false; + } + if (!$this->positive && $integer > 0) { + return false; + } + if (!$this->negative && $integer < 0) { + return false; + } + + return $integer; + } +} + +// vim: et sw=4 sts=4 |