remove autoload section in composer.json

[github/wallabag/wallabag.git] / inc / 3rdparty / htmlpurifier / HTMLPurifier / Length.php

<?php\r
\r
/**\r
 * Represents a measurable length, with a string numeric magnitude\r
 * and a unit. This object is immutable.\r
 */\r
class HTMLPurifier_Length\r
{\r
\r
    /**\r
     * String numeric magnitude.\r
     * @type string\r
     */\r
    protected $n;\r
\r
    /**\r
     * String unit. False is permitted if $n = 0.\r
     * @type string|bool\r
     */\r
    protected $unit;\r
\r
    /**\r
     * Whether or not this length is valid. Null if not calculated yet.\r
     * @type bool\r
     */\r
    protected $isValid;\r
\r
    /**\r
     * Array Lookup array of units recognized by CSS 2.1\r
     * @type array\r
     */\r
    protected static $allowedUnits = array(\r
        'em' => true, 'ex' => true, 'px' => true, 'in' => true,\r
        'cm' => true, 'mm' => true, 'pt' => true, 'pc' => true\r
    );\r
\r
    /**\r
     * @param string $n Magnitude\r
     * @param bool|string $u Unit\r
     */\r
    public function __construct($n = '0', $u = false)\r
    {\r
        $this->n = (string) $n;\r
        $this->unit = $u !== false ? (string) $u : false;\r
    }\r
\r
    /**\r
     * @param string $s Unit string, like '2em' or '3.4in'\r
     * @return HTMLPurifier_Length\r
     * @warning Does not perform validation.\r
     */\r
    public static function make($s)\r
    {\r
        if ($s instanceof HTMLPurifier_Length) {\r
            return $s;\r
        }\r
        $n_length = strspn($s, '1234567890.+-');\r
        $n = substr($s, 0, $n_length);\r
        $unit = substr($s, $n_length);\r
        if ($unit === '') {\r
            $unit = false;\r
        }\r
        return new HTMLPurifier_Length($n, $unit);\r
    }\r
\r
    /**\r
     * Validates the number and unit.\r
     * @return bool\r
     */\r
    protected function validate()\r
    {\r
        // Special case:\r
        if ($this->n === '+0' || $this->n === '-0') {\r
            $this->n = '0';\r
        }\r
        if ($this->n === '0' && $this->unit === false) {\r
            return true;\r
        }\r
        if (!ctype_lower($this->unit)) {\r
            $this->unit = strtolower($this->unit);\r
        }\r
        if (!isset(HTMLPurifier_Length::$allowedUnits[$this->unit])) {\r
            return false;\r
        }\r
        // Hack:\r
        $def = new HTMLPurifier_AttrDef_CSS_Number();\r
        $result = $def->validate($this->n, false, false);\r
        if ($result === false) {\r
            return false;\r
        }\r
        $this->n = $result;\r
        return true;\r
    }\r
\r
    /**\r
     * Returns string representation of number.\r
     * @return string\r
     */\r
    public function toString()\r
    {\r
        if (!$this->isValid()) {\r
            return false;\r
        }\r
        return $this->n . $this->unit;\r
    }\r
\r
    /**\r
     * Retrieves string numeric magnitude.\r
     * @return string\r
     */\r
    public function getN()\r
    {\r
        return $this->n;\r
    }\r
\r
    /**\r
     * Retrieves string unit.\r
     * @return string\r
     */\r
    public function getUnit()\r
    {\r
        return $this->unit;\r
    }\r
\r
    /**\r
     * Returns true if this length unit is valid.\r
     * @return bool\r
     */\r
    public function isValid()\r
    {\r
        if ($this->isValid === null) {\r
            $this->isValid = $this->validate();\r
        }\r
        return $this->isValid;\r
    }\r
\r
    /**\r
     * Compares two lengths, and returns 1 if greater, -1 if less and 0 if equal.\r
     * @param HTMLPurifier_Length $l\r
     * @return int\r
     * @warning If both values are too large or small, this calculation will\r
     *          not work properly\r
     */\r
    public function compareTo($l)\r
    {\r
        if ($l === false) {\r
            return false;\r
        }\r
        if ($l->unit !== $this->unit) {\r
            $converter = new HTMLPurifier_UnitConverter();\r
            $l = $converter->convert($l, $this->unit);\r
            if ($l === false) {\r
                return false;\r
            }\r
        }\r
        return $this->n - $l->n;\r
    }\r
}\r
\r
// vim: et sw=4 sts=4\r