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