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, $context)
Public Member Functions inherited from HTMLPurifier_AttrDef
	parseCDATA ($string)
	Convenience method that parses a string as if it were CDATA.
	make ($string)
	Factory method for creating this class from a string.

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

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

Detailed Description

Validates a number as defined by the CSS spec.

Definition at line 6 of file Number.php.

Constructor & Destructor Documentation

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

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

Reimplemented from HTMLPurifier_AttrDef.

Reimplemented in HTMLPurifier_AttrDef_CSS_AlphaValue.

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;
        }

        $left = ltrim($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

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().

---

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

• Services/Html/HtmlPurifier/library/HTMLPurifier/AttrDef/CSS/Number.php