HTMLPurifier_AttrDef_CSS_Number Class Reference

Validates a number as defined by the CSS spec. More...

Inheritance diagram for HTMLPurifier_AttrDef_CSS_Number:

Collaboration diagram for HTMLPurifier_AttrDef_CSS_Number:

Public Member Functions
	__construct ($non_negative=false)
	validate ($number, $config, $context)
Public Member Functions inherited from HTMLPurifier_AttrDef
	validate ($string, $config, $context)
	Validates and cleans passed string according to a definition. More...
	parseCDATA ($string)
	Convenience method that parses a string as if it were CDATA. More...
	make ($string)
	Factory method for creating this class from a string. More...

Protected Attributes
	$non_negative = false
	Indicates whether or not only positive values are allowed. More...

Additional Inherited Members
Data Fields inherited from HTMLPurifier_AttrDef
	$minimized = false
	Tells us whether or not an HTML attribute is minimized. More...
	$required = false
	Tells us whether or not an HTML attribute is required. More...
Protected Member Functions inherited from HTMLPurifier_AttrDef
	mungeRgb ($string)
	Removes spaces from rgb(0, 0, 0) so that shorthand CSS properties work properly. More...
	expandCSSEscape ($string)
	Parses a possibly escaped CSS string and returns the "pure" version of it. More...

Detailed Description

Validates a number as defined by the CSS spec.

Definition at line 6 of file Number.php.

Constructor & Destructor Documentation

__construct()

HTMLPurifier_AttrDef_CSS_Number::__construct

(

$non_negative = false

)

Parameters

bool

$non_negative

indicates whether negatives are forbidden

Definition at line 18 of file Number.php.

References $non_negative.

    {
        $this->non_negative = $non_negative;
    }

Member Function Documentation

validate()

HTMLPurifier_AttrDef_CSS_Number::validate	(		$number,
			$config,
			$context
	)

Parameters

string	$number
HTMLPurifier_Config	$config
HTMLPurifier_Context	$context

Returns

string|bool

Warning

Some contexts do not pass $config, $context. These variables should not be used without checking HTMLPurifier_Length

Definition at line 31 of file Number.php.

References HTMLPurifier_AttrDef\parseCDATA().

    {
        $number = $this->parseCDATA($number);

        if ($number === '') {
            return false;
        }
        if ($number === '0') {
            return '0';
        }

        $sign = '';
        switch ($number[0]) {
            case '-':
                if ($this->non_negative) {
                    return false;
                }
                $sign = '-';
            case '+':
                $number = substr($number, 1);
        }

        if (ctype_digit($number)) {
            $number = ltrim($number, '0');
            return $number ? $sign . $number : '0';
        }

        // Period is the only non-numeric character allowed
        if (strpos($number, '.') === false) {
            return false;
        }

        list($left, $right) = explode('.', $number, 2);

        if ($left === '' && $right === '') {
            return false;
        }
        if ($left !== '' && !ctype_digit($left)) {
            return false;
        }

        // Remove leading zeros until positive number or a zero stays left
        if (ltrim($left, '0') != '') {
            $left = ltrim($left, '0');
        } else {
            $left = '0';
        }

        $right = rtrim($right, '0');

        if ($right === '') {
            return $left ? $sign . $left : '0';
        } elseif (!ctype_digit($right)) {
            return false;
        }
        return $sign . $left . '.' . $right;
    }

Here is the call graph for this function:

Field Documentation

$non_negative

HTMLPurifier_AttrDef_CSS_Number::$non_negative = false

protected

Indicates whether or not only positive values are allowed.

bool

Definition at line 13 of file Number.php.

Referenced by __construct().

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The documentation for this class was generated from the following file:

• libs/composer/vendor/ezyang/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Number.php