Class HTMLPurifier_UnitConverter

Class for converting between different unit-lengths as specified by CSS.

Located at x2engine/framework/vendors/htmlpurifier/HTMLPurifier.standalone.php

Methods summary
`public`	# `__construct( mixed $output_precision = 4, mixed $internal_precision = 10, mixed $force_no_bcmath = false )`
`public HTMLPurifier_Length\|boolean`	# `convert( HTMLPurifier_Length $length, string $to_unit )` Converts a length object of one unit into another unit. Converts a length object of one unit into another unit. Parameters `$length` `HTMLPurifier_Length` $length Instance of HTMLPurifier_Length to convert. You must validate() it before passing it here! `$to_unit` `string` $to_unit Unit to convert to. Returns `HTMLPurifier_Length\|boolean` Note About precision: This conversion function pays very special attention to the incoming precision of values and attempts to maintain a number of significant figure. Results are fairly accurate up to nine digits. Some caveats: - If a number is zero-padded as a result of this significant figure tracking, the zeroes will be eliminated. - If a number contains less than four sigfigs ($outputPrecision) and this causes some decimals to be excluded, those decimals will be added on.
`public integer`	# `getSigFigs( string $n )` Returns the number of significant figures in a string number. Returns the number of significant figures in a string number. Parameters `$n` `string` $n Decimal number Returns `integer` number of sigfigs

Properties summary
`protected static array`	`$units`	`array( self::ENGLISH => array( 'px' => 3, // This is as per CSS 2.1 and Firefox. Your mileage may vary 'pt' => 4, 'pc' => 48, 'in' => 288, self::METRIC => array('pt', '0.352777778', 'mm'), ), self::METRIC => array( 'mm' => 1, 'cm' => 10, self::ENGLISH => array('mm', '2.83464567', 'pt'), ), )`	# Units information array. Units are grouped into measuring systems (English, Metric), and are assigned an integer representing the conversion factor between that unit and the smallest unit in the system. Numeric indexes are actually magical constants that encode conversion data from one system to the next, with a O(n²) constraint on memory (this is generally not a problem, since the number of measuring systems is small.) Units information array. Units are grouped into measuring systems (English, Metric), and are assigned an integer representing the conversion factor between that unit and the smallest unit in the system. Numeric indexes are actually magical constants that encode conversion data from one system to the next, with a O(n²) constraint on memory (this is generally not a problem, since the number of measuring systems is small.)
`protected mixed`	`$outputPrecision`		# Minimum bcmath precision for output. Minimum bcmath precision for output. Type int
`protected mixed`	`$internalPrecision`		# Bcmath precision for internal calculations. Bcmath precision for internal calculations. Type int