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<?php |
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/** |
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* SCSSPHP |
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* |
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* @copyright 2012-2015 Leaf Corcoran |
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* |
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* @license http://opensource.org/licenses/MIT MIT |
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* |
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* @link http://leafo.github.io/scssphp |
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*/ |
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|
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namespace Leafo\ScssPhp\Node; |
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|
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use Leafo\ScssPhp\Node; |
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use Leafo\ScssPhp\Type; |
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|
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/** |
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* SCSS dimension + optional units |
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* |
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* {@internal |
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* This is a work-in-progress. |
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* |
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* The \ArrayAccess interface is temporary until the migration is complete. |
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* }} |
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* |
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* @author Anthon Pang <anthon.pang@gmail.com> |
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*/ |
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class Number extends Node implements \ArrayAccess |
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{ |
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/** |
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* @var integer |
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*/ |
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static public $precision = 5; |
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|
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/** |
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* @see http://www.w3.org/TR/2012/WD-css3-values-20120308/ |
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* |
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* @var array |
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*/ |
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static protected $unitTable = array( |
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'in' => array( |
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'in' => 1, |
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'pc' => 6, |
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'pt' => 72, |
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'px' => 96, |
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'cm' => 2.54, |
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'mm' => 25.4, |
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'q' => 101.6, |
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), |
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'turn' => array( |
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'deg' => 180, |
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'grad' => 200, |
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'rad' => M_PI, |
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'turn' => 0.5, |
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), |
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's' => array( |
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's' => 1, |
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'ms' => 1000, |
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), |
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'Hz' => array( |
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'Hz' => 1, |
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'kHz' => 0.001, |
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), |
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'dpi' => array( |
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'dpi' => 1, |
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'dpcm' => 2.54, |
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'dppx' => 96, |
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), |
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); |
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|
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/** |
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* @var integer|float |
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*/ |
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public $dimension; |
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|
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/** |
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* @var string |
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*/ |
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public $units; |
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|
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/** |
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* Initialize number |
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* |
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* @param mixed $dimension |
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* @param string $initialUnit |
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*/ |
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public function __construct($dimension, $initialUnit) |
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{ |
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$this->type = Type::T_NUMBER; |
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$this->dimension = $dimension; |
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$this->units = $initialUnit; |
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} |
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|
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/** |
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* Coerce number to target units |
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* |
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* @param array $units |
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* |
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* @return \Leafo\ScssPhp\Node\Number |
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*/ |
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public function coerce($units) |
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{ |
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$value = $this->dimension; |
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|
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if (isset(self::$unitTable[$this->units][$units])) { |
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$value *= self::$unitTable[$this->units][$units]; |
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} |
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|
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return new Number($value, $units); |
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} |
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|
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/** |
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* Normalize number |
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* |
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* @return \Leafo\ScssPhp\Node\Number |
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*/ |
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public function normalize() |
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{ |
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if (isset(self::$unitTable['in'][$this->units])) { |
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$conv = self::$unitTable['in'][$this->units]; |
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|
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return new Number($this->dimension / $conv, 'in'); |
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} |
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|
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return new Number($this->dimension, $this->units); |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetExists($offset) |
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{ |
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if ($offset === -2) { |
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return $sourceIndex !== null; |
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} |
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|
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if ($offset === -1 |
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|| $offset === 0 |
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|| $offset === 1 |
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|| $offset === 2 |
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) { |
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return true; |
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} |
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|
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return false; |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetGet($offset) |
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{ |
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switch ($offset) { |
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case -2: |
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return $this->sourceIndex; |
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|
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case -1: |
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return $this->sourcePosition; |
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|
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case 0: |
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return $this->type; |
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|
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case 1: |
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return $this->dimension; |
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|
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case 2: |
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return $this->units; |
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} |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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if ($offset === 1) { |
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$this->dimension = $value; |
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} elseif ($offset === 2) { |
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$this->units = $value; |
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} elseif ($offset == -1) { |
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$this->sourcePosition = $value; |
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} elseif ($offset == -2) { |
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$this->sourceIndex = $value; |
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} |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetUnset($offset) |
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{ |
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if ($offset === 1) { |
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$this->dimension = null; |
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} elseif ($offset === 2) { |
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$this->units = null; |
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} elseif ($offset === -1) { |
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$this->sourcePosition = null; |
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} elseif ($offset === -2) { |
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$this->sourceIndex = null; |
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} |
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} |
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|
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/** |
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* Returns true if the number is unitless |
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* |
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* @return boolean |
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*/ |
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public function unitless() |
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{ |
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return empty($this->units); |
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} |
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|
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/** |
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* Returns unit(s) as the product of numerator units divided by the product of denominator units |
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* |
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* @return string |
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*/ |
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public function unitStr() |
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{ |
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return $this->units; |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function __toString() |
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{ |
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$value = round($this->dimension, self::$precision); |
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|
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if (empty($this->units)) { |
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return (string) $value; |
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} |
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|
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return (string) $value . $this->units; |
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} |
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} |
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|
