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PATH: home / lab2454c / tripvare.com / vendor / ezyang / htmlpurifier / library / HTMLPurifier

<?php

/**
 * Represents a measurable length, with a string numeric magnitude
 * and a unit. This object is immutable.
 */
class HTMLPurifier_Length
{

/**
     * String numeric magnitude.
     * @type string
     */
    protected $n;

/**
     * String unit. False is permitted if $n = 0.
     * @type string|bool
     */
    protected $unit;

/**
     * Whether or not this length is valid. Null if not calculated yet.
     * @type bool
     */
    protected $isValid;

/**
     * Array Lookup array of units recognized by CSS 3
     * @type array
     */
    protected static $allowedUnits = array(
        'em' => true, 'ex' => true, 'px' => true, 'in' => true,
        'cm' => true, 'mm' => true, 'pt' => true, 'pc' => true,
        'ch' => true, 'rem' => true, 'vw' => true, 'vh' => true,
        'vmin' => true, 'vmax' => true
    );

/**
     * @param string $n Magnitude
     * @param bool|string $u Unit
     */
    public function __construct($n = '0', $u = false)
    {
        $this->n = (string) $n;
        $this->unit = $u !== false ? (string) $u : false;
    }

/**
     * @param string $s Unit string, like '2em' or '3.4in'
     * @return HTMLPurifier_Length
     * @warning Does not perform validation.
     */
    public static function make($s)
    {
        if ($s instanceof HTMLPurifier_Length) {
            return $s;
        }
        $n_length = strspn($s, '1234567890.+-');
        $n = substr($s, 0, $n_length);
        $unit = substr($s, $n_length);
        if ($unit === '') {
            $unit = false;
        }
        return new HTMLPurifier_Length($n, $unit);
    }

/**
     * Validates the number and unit.
     * @return bool
     */
    protected function validate()
    {
        // Special case:
        if ($this->n === '+0' || $this->n === '-0') {
            $this->n = '0';
        }
        if ($this->n === '0' && $this->unit === false) {
            return true;
        }
        if (!ctype_lower($this->unit)) {
            $this->unit = strtolower($this->unit);
        }
        if (!isset(HTMLPurifier_Length::$allowedUnits[$this->unit])) {
            return false;
        }
        // Hack:
        $def = new HTMLPurifier_AttrDef_CSS_Number();
        $result = $def->validate($this->n, false, false);
        if ($result === false) {
            return false;
        }
        $this->n = $result;
        return true;
    }

/**
     * Returns string representation of number.
     * @return string
     */
    public function toString()
    {
        if (!$this->isValid()) {
            return false;
        }
        return $this->n . $this->unit;
    }

/**
     * Retrieves string numeric magnitude.
     * @return string
     */
    public function getN()
    {
        return $this->n;
    }

/**
     * Retrieves string unit.
     * @return string
     */
    public function getUnit()
    {
        return $this->unit;
    }

/**
     * Returns true if this length unit is valid.
     * @return bool
     */
    public function isValid()
    {
        if ($this->isValid === null) {
            $this->isValid = $this->validate();
        }
        return $this->isValid;
    }

/**
     * Compares two lengths, and returns 1 if greater, -1 if less and 0 if equal.
     * @param HTMLPurifier_Length $l
     * @return int
     * @warning If both values are too large or small, this calculation will
     *          not work properly
     */
    public function compareTo($l)
    {
        if ($l === false) {
            return false;
        }
        if ($l->unit !== $this->unit) {
            $converter = new HTMLPurifier_UnitConverter();
            $l = $converter->convert($l, $this->unit);
            if ($l === false) {
                return false;
            }
        }
        return $this->n - $l->n;
    }
}

// vim: et sw=4 sts=4

[+] Injector
[-] CSSDefinition.php [edit]
[+] URIScheme
[-] TagTransform.php [edit]
[+] DefinitionCache
[+] HTMLModule
[-] Filter.php [edit]
[-] Language.php [edit]
[+] VarParser
[-] ChildDef.php [edit]
[-] TokenFactory.php [edit]
[-] Printer.php [edit]
[+] Lexer
[-] Context.php [edit]
[+] ..
[+] URIFilter
[-] Encoder.php [edit]
[+] Strategy
[-] Config.php [edit]
[-] DefinitionCacheFactory.php [edit]
[-] Definition.php [edit]
[-] PropertyList.php [edit]
[-] AttrCollections.php [edit]
[-] EntityLookup.php [edit]
[-] LanguageFactory.php [edit]
[-] UnitConverter.php [edit]
[-] Bootstrap.php [edit]
[+] ChildDef
[-] Node.php [edit]
[-] URIDefinition.php [edit]
[-] Length.php [edit]
[+] AttrDef
[-] ElementDef.php [edit]
[-] Injector.php [edit]
[+] ConfigSchema
[-] EntityParser.php [edit]
[-] Token.php [edit]
[-] StringHash.php [edit]
[-] AttrDef.php [edit]
[+] Filter
[-] IDAccumulator.php [edit]
[-] ErrorStruct.php [edit]
[-] HTMLDefinition.php [edit]
[-] StringHashParser.php [edit]
[-] Queue.php [edit]
[-] ErrorCollector.php [edit]
[-] URIParser.php [edit]
[-] URI.php [edit]
[-] ConfigSchema.php [edit]
[-] ContentSets.php [edit]
[-] Doctype.php [edit]
[-] AttrValidator.php [edit]
[-] URIScheme.php [edit]
[-] PropertyListIterator.php [edit]
[-] HTMLModuleManager.php [edit]
[-] Strategy.php [edit]
[-] DefinitionCache.php [edit]
[-] Generator.php [edit]
[-] PercentEncoder.php [edit]
[+] Printer
[-] AttrTransform.php [edit]
[-] Exception.php [edit]
[-] URIFilter.php [edit]
[-] VarParserException.php [edit]
[-] AttrTypes.php [edit]
[+] Token
[+] TagTransform
[+] Language
[+] EntityLookup
[-] Arborize.php [edit]
[-] Lexer.php [edit]
[-] DoctypeRegistry.php [edit]
[+] AttrTransform
[+] Node
[-] URISchemeRegistry.php [edit]
[-] VarParser.php [edit]
[-] HTMLModule.php [edit]
[-] Zipper.php [edit]