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<?php
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namespace PhpOffice\PhpSpreadsheet\Helper;
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use PhpOffice\PhpSpreadsheet\Exception;
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use PhpOffice\PhpSpreadsheet\Shared\Drawing;
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use PhpOffice\PhpSpreadsheet\Style\Font;
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class Dimension
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{
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public const UOM_CENTIMETERS = 'cm';
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public const UOM_MILLIMETERS = 'mm';
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public const UOM_INCHES = 'in';
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public const UOM_PIXELS = 'px';
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public const UOM_POINTS = 'pt';
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public const UOM_PICA = 'pc';
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/**
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* Based on 96 dpi.
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*/
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const ABSOLUTE_UNITS = [
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self::UOM_CENTIMETERS => 96.0 / 2.54,
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self::UOM_MILLIMETERS => 96.0 / 25.4,
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self::UOM_INCHES => 96.0,
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self::UOM_PIXELS => 1.0,
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self::UOM_POINTS => 96.0 / 72,
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self::UOM_PICA => 96.0 * 12 / 72,
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];
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/**
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* Based on a standard column width of 8.54 units in MS Excel.
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*/
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const RELATIVE_UNITS = [
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'em' => 10.0 / 8.54,
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'ex' => 10.0 / 8.54,
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'ch' => 10.0 / 8.54,
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'rem' => 10.0 / 8.54,
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'vw' => 8.54,
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'vh' => 8.54,
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'vmin' => 8.54,
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'vmax' => 8.54,
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'%' => 8.54 / 100,
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];
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/**
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* @var float|int If this is a width, then size is measured in pixels (if is set)
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* or in Excel's default column width units if $unit is null.
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* If this is a height, then size is measured in pixels ()
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* or in points () if $unit is null.
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*/
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protected float|int $size;
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protected ?string $unit = null;
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/**
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* Phpstan bug has been fixed; this function allows us to
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* pass Phpstan whether fixed or not.
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*/
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private static function stanBugFixed(array|int|null $value): array
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{
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return is_array($value) ? $value : [null, null];
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}
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public function __construct(string $dimension)
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{
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[$size, $unit] = self::stanBugFixed(sscanf($dimension, '%[1234567890.]%s'));
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$unit = strtolower(trim($unit ?? ''));
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$size = (float) $size;
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// If a UoM is specified, then convert the size to pixels for internal storage
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if (isset(self::ABSOLUTE_UNITS[$unit])) {
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$size *= self::ABSOLUTE_UNITS[$unit];
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$this->unit = self::UOM_PIXELS;
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} elseif (isset(self::RELATIVE_UNITS[$unit])) {
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$size *= self::RELATIVE_UNITS[$unit];
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$size = round($size, 4);
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}
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$this->size = $size;
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}
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public function width(): float
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{
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return (float) ($this->unit === null)
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? $this->size
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: round(Drawing::pixelsToCellDimension((int) $this->size, new Font(false)), 4);
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}
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public function height(): float
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{
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return (float) ($this->unit === null)
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? $this->size
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: $this->toUnit(self::UOM_POINTS);
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}
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public function toUnit(string $unitOfMeasure): float
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{
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$unitOfMeasure = strtolower($unitOfMeasure);
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if (!array_key_exists($unitOfMeasure, self::ABSOLUTE_UNITS)) {
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throw new Exception("{$unitOfMeasure} is not a vaid unit of measure");
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}
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$size = $this->size;
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if ($this->unit === null) {
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$size = Drawing::cellDimensionToPixels($size, new Font(false));
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}
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return $size / self::ABSOLUTE_UNITS[$unitOfMeasure];
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}
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}
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