HTMLPurifier_AttrDef_CSS_BackgroundPosition Class Reference

Validates the value of background-position. More...

Inheritance diagram for HTMLPurifier_AttrDef_CSS_BackgroundPosition:

Collaboration diagram for HTMLPurifier_AttrDef_CSS_BackgroundPosition:

Public Member Functions
	__construct ()
	validate ($string, $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
	$length
	$percentage

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 the value of background-position.

Definition at line 44 of file BackgroundPosition.php.

Constructor & Destructor Documentation

__construct()

HTMLPurifier_AttrDef_CSS_BackgroundPosition::__construct

(

)

Definition at line 50 of file BackgroundPosition.php.

                                  {
        $this->length     = new HTMLPurifier_AttrDef_CSS_Length();
        $this->percentage = new HTMLPurifier_AttrDef_CSS_Percentage();
    }

Member Function Documentation

validate()

HTMLPurifier_AttrDef_CSS_BackgroundPosition::validate	(		$string,
			$config,
			$context
	)

Definition at line 55 of file BackgroundPosition.php.

References $r, $ret, and HTMLPurifier_AttrDef\parseCDATA().

                                                         {
        $string = $this->parseCDATA($string);
        $bits = explode(' ', $string);

        $keywords = array();
        $keywords['h'] = false; // left, right
        $keywords['v'] = false; // top, bottom
        $keywords['ch'] = false; // center (first word)
        $keywords['cv'] = false; // center (second word)
        $measures = array();

        $i = 0;

        $lookup = array(
            'top' => 'v',
            'bottom' => 'v',
            'left' => 'h',
            'right' => 'h',
            'center' => 'c'
        );

        foreach ($bits as $bit) {
            if ($bit === '') continue;

            // test for keyword
            $lbit = ctype_lower($bit) ? $bit : strtolower($bit);
            if (isset($lookup[$lbit])) {
                $status = $lookup[$lbit];
                if ($status == 'c') {
                    if ($i == 0) {
                        $status = 'ch';
                    } else {
                        $status = 'cv';
                    }
                }
                $keywords[$status] = $lbit;
                $i++;
            }

            // test for length
            $r = $this->length->validate($bit, $config, $context);
            if ($r !== false) {
                $measures[] = $r;
                $i++;
            }

            // test for percentage
            $r = $this->percentage->validate($bit, $config, $context);
            if ($r !== false) {
                $measures[] = $r;
                $i++;
            }

        }

        if (!$i) return false; // no valid values were caught

        $ret = array();

        // first keyword
        if     ($keywords['h'])     $ret[] = $keywords['h'];
        elseif ($keywords['ch']) {
            $ret[] = $keywords['ch'];
            $keywords['cv'] = false; // prevent re-use: center = center center
        }
        elseif (count($measures))   $ret[] = array_shift($measures);

        if     ($keywords['v'])     $ret[] = $keywords['v'];
        elseif ($keywords['cv'])    $ret[] = $keywords['cv'];
        elseif (count($measures))   $ret[] = array_shift($measures);

        if (empty($ret)) return false;
        return implode(' ', $ret);

    }

Here is the call graph for this function:

Field Documentation

$length

HTMLPurifier_AttrDef_CSS_BackgroundPosition::$length

protected

Definition at line 47 of file BackgroundPosition.php.

$percentage

HTMLPurifier_AttrDef_CSS_BackgroundPosition::$percentage

protected

Definition at line 48 of file BackgroundPosition.php.

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

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