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Differences Between: [Versions 400 and 401]

   1  <?php
   2  
   3  namespace PhpOffice\PhpSpreadsheet\Helper;
   4  
   5  use PhpOffice\PhpSpreadsheet\Exception;
   6  use PhpOffice\PhpSpreadsheet\Shared\Drawing;
   7  use PhpOffice\PhpSpreadsheet\Style\Font;
   8  
   9  class Dimension
  10  {
  11      public const UOM_CENTIMETERS = 'cm';
  12      public const UOM_MILLIMETERS = 'mm';
  13      public const UOM_INCHES = 'in';
  14      public const UOM_PIXELS = 'px';
  15      public const UOM_POINTS = 'pt';
  16      public const UOM_PICA = 'pc';
  17  
  18      /**
  19       * Based on 96 dpi.
  20       */
  21      const ABSOLUTE_UNITS = [
  22          self::UOM_CENTIMETERS => 96.0 / 2.54,
  23          self::UOM_MILLIMETERS => 96.0 / 25.4,
  24          self::UOM_INCHES => 96.0,
  25          self::UOM_PIXELS => 1.0,
  26          self::UOM_POINTS => 96.0 / 72,
  27          self::UOM_PICA => 96.0 * 12 / 72,
  28      ];
  29  
  30      /**
  31       * Based on a standard column width of 8.54 units in MS Excel.
  32       */
  33      const RELATIVE_UNITS = [
  34          'em' => 10.0 / 8.54,
  35          'ex' => 10.0 / 8.54,
  36          'ch' => 10.0 / 8.54,
  37          'rem' => 10.0 / 8.54,
  38          'vw' => 8.54,
  39          'vh' => 8.54,
  40          'vmin' => 8.54,
  41          'vmax' => 8.54,
  42          '%' => 8.54 / 100,
  43      ];
  44  
  45      /**
  46       * @var float|int If this is a width, then size is measured in pixels (if is set)
  47       *                   or in Excel's default column width units if $unit is null.
  48       *                If this is a height, then size is measured in pixels ()
  49       *                   or in points () if $unit is null.
  50       */
  51      protected $size;
  52  
  53      /**
  54       * @var null|string
  55       */
  56      protected $unit;
  57  
  58      /**
  59       * Phpstan bug has been fixed; this function allows us to
  60       * pass Phpstan whether fixed or not.
  61       *
  62       * @param mixed $value
  63       */
  64      private static function stanBugFixed($value): array
  65      {
  66          return is_array($value) ? $value : [null, null];
  67      }
  68  
  69      public function __construct(string $dimension)
  70      {
  71          [$size, $unit] = self::stanBugFixed(sscanf($dimension, '%[1234567890.]%s'));
  72          $unit = strtolower(trim($unit ?? ''));
  73          $size = (float) $size;
  74  
  75          // If a UoM is specified, then convert the size to pixels for internal storage
  76          if (isset(self::ABSOLUTE_UNITS[$unit])) {
  77              $size *= self::ABSOLUTE_UNITS[$unit];
  78              $this->unit = self::UOM_PIXELS;
  79          } elseif (isset(self::RELATIVE_UNITS[$unit])) {
  80              $size *= self::RELATIVE_UNITS[$unit];
  81              $size = round($size, 4);
  82          }
  83  
  84          $this->size = $size;
  85      }
  86  
  87      public function width(): float
  88      {
  89          return (float) ($this->unit === null)
  90              ? $this->size
  91              : round(Drawing::pixelsToCellDimension((int) $this->size, new Font(false)), 4);
  92      }
  93  
  94      public function height(): float
  95      {
  96          return (float) ($this->unit === null)
  97              ? $this->size
  98              : $this->toUnit(self::UOM_POINTS);
  99      }
 100  
 101      public function toUnit(string $unitOfMeasure): float
 102      {
 103          $unitOfMeasure = strtolower($unitOfMeasure);
 104          if (!array_key_exists($unitOfMeasure, self::ABSOLUTE_UNITS)) {
 105              throw new Exception("{$unitOfMeasure} is not a vaid unit of measure");
 106          }
 107  
 108          $size = $this->size;
 109          if ($this->unit === null) {
 110              $size = Drawing::cellDimensionToPixels($size, new Font(false));
 111          }
 112  
 113          return $size / self::ABSOLUTE_UNITS[$unitOfMeasure];
 114      }
 115  }