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   1  <?php
   2  
   3  namespace Sabberworm\CSS\Value;
   4  
   5  use Sabberworm\CSS\Parsing\ParserState;
   6  
   7  class Size extends PrimitiveValue {
   8  
   9      const ABSOLUTE_SIZE_UNITS = 'px/cm/mm/mozmm/in/pt/pc/vh/vw/vm/vmin/vmax/rem'; //vh/vw/vm(ax)/vmin/rem are absolute insofar as they don’t scale to the immediate parent (only the viewport)
  10      const RELATIVE_SIZE_UNITS = '%/em/ex/ch/fr';
  11      const NON_SIZE_UNITS = 'deg/grad/rad/s/ms/turns/Hz/kHz';
  12  
  13      private static $SIZE_UNITS = null;
  14  
  15      private $fSize;
  16      private $sUnit;
  17      private $bIsColorComponent;
  18  
  19  	public function __construct($fSize, $sUnit = null, $bIsColorComponent = false, $iLineNo = 0) {
  20          parent::__construct($iLineNo);
  21          $this->fSize = floatval($fSize);
  22          $this->sUnit = $sUnit;
  23          $this->bIsColorComponent = $bIsColorComponent;
  24      }
  25  
  26  	public static function parse(ParserState $oParserState, $bIsColorComponent = false) {
  27          $sSize = '';
  28          if ($oParserState->comes('-')) {
  29              $sSize .= $oParserState->consume('-');
  30          }
  31          while (is_numeric($oParserState->peek()) || $oParserState->comes('.')) {
  32              if ($oParserState->comes('.')) {
  33                  $sSize .= $oParserState->consume('.');
  34              } else {
  35                  $sSize .= $oParserState->consume(1);
  36              }
  37          }
  38  
  39          $sUnit = null;
  40          $aSizeUnits = self::getSizeUnits();
  41          foreach($aSizeUnits as $iLength => &$aValues) {
  42              $sKey = strtolower($oParserState->peek($iLength));
  43              if(array_key_exists($sKey, $aValues)) {
  44                  if (($sUnit = $aValues[$sKey]) !== null) {
  45                      $oParserState->consume($iLength);
  46                      break;
  47                  }
  48              }
  49          }
  50          return new Size(floatval($sSize), $sUnit, $bIsColorComponent, $oParserState->currentLine());
  51      }
  52  
  53  	private static function getSizeUnits() {
  54          if(self::$SIZE_UNITS === null) {
  55              self::$SIZE_UNITS = array();
  56              foreach (explode('/', Size::ABSOLUTE_SIZE_UNITS.'/'.Size::RELATIVE_SIZE_UNITS.'/'.Size::NON_SIZE_UNITS) as $val) {
  57                  $iSize = strlen($val);
  58                  if(!isset(self::$SIZE_UNITS[$iSize])) {
  59                      self::$SIZE_UNITS[$iSize] = array();
  60                  }
  61                  self::$SIZE_UNITS[$iSize][strtolower($val)] = $val;
  62              }
  63  
  64              // FIXME: Should we not order the longest units first?
  65              ksort(self::$SIZE_UNITS, SORT_NUMERIC);
  66          }
  67  
  68          return self::$SIZE_UNITS;
  69      }
  70  
  71  	public function setUnit($sUnit) {
  72          $this->sUnit = $sUnit;
  73      }
  74  
  75  	public function getUnit() {
  76          return $this->sUnit;
  77      }
  78  
  79  	public function setSize($fSize) {
  80          $this->fSize = floatval($fSize);
  81      }
  82  
  83  	public function getSize() {
  84          return $this->fSize;
  85      }
  86  
  87  	public function isColorComponent() {
  88          return $this->bIsColorComponent;
  89      }
  90  
  91      /**
  92       * Returns whether the number stored in this Size really represents a size (as in a length of something on screen).
  93       * @return false if the unit an angle, a duration, a frequency or the number is a component in a Color object.
  94       */
  95  	public function isSize() {
  96          if (in_array($this->sUnit, explode('/', self::NON_SIZE_UNITS))) {
  97              return false;
  98          }
  99          return !$this->isColorComponent();
 100      }
 101  
 102  	public function isRelative() {
 103          if (in_array($this->sUnit, explode('/', self::RELATIVE_SIZE_UNITS))) {
 104              return true;
 105          }
 106          if ($this->sUnit === null && $this->fSize != 0) {
 107              return true;
 108          }
 109          return false;
 110      }
 111  
 112  	public function __toString() {
 113          return $this->render(new \Sabberworm\CSS\OutputFormat());
 114      }
 115  
 116  	public function render(\Sabberworm\CSS\OutputFormat $oOutputFormat) {
 117          $l = localeconv();
 118          $sPoint = preg_quote($l['decimal_point'], '/');
 119          return preg_replace(array("/$sPoint/", "/^(-?)0\./"), array('.', '$1.'), $this->fSize) . ($this->sUnit === null ? '' : $this->sUnit);
 120      }
 121  
 122  }