vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/Xls.php

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<?php

namespace PhpOffice\PhpSpreadsheet\Shared;

use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;

class Xls
{
    /**
     * Get the width of a column in pixels. We use the relationship y = ceil(7x) where
     * x is the width in intrinsic Excel units (measuring width in number of normal characters)
     * This holds for Arial 10.
     *
     * @param Worksheet $sheet The sheet
     * @param string $col The column
     *
     * @return int The width in pixels
     */
    public static function sizeCol($sheet, $col = 'A')
    {
        // default font of the workbook
        $font = $sheet->getParent()->getDefaultStyle()->getFont();

        $columnDimensions = $sheet->getColumnDimensions();

        // first find the true column width in pixels (uncollapsed and unhidden)
        if (isset($columnDimensions[$col]) && $columnDimensions[$col]->getWidth() != -1) {
            // then we have column dimension with explicit width
            $columnDimension = $columnDimensions[$col];
            $width = $columnDimension->getWidth();
            $pixelWidth = Drawing::cellDimensionToPixels($width, $font);
        } elseif ($sheet->getDefaultColumnDimension()->getWidth() != -1) {
            // then we have default column dimension with explicit width
            $defaultColumnDimension = $sheet->getDefaultColumnDimension();
            $width = $defaultColumnDimension->getWidth();
            $pixelWidth = Drawing::cellDimensionToPixels($width, $font);
        } else {
            // we don't even have any default column dimension. Width depends on default font
            $pixelWidth = Font::getDefaultColumnWidthByFont($font, true);
        }

        // now find the effective column width in pixels
        if (isset($columnDimensions[$col]) && !$columnDimensions[$col]->getVisible()) {
            $effectivePixelWidth = 0;
        } else {
            $effectivePixelWidth = $pixelWidth;
        }

        return $effectivePixelWidth;
    }

    /**
     * Convert the height of a cell from user's units to pixels. By interpolation
     * the relationship is: y = 4/3x. If the height hasn't been set by the user we
     * use the default value. If the row is hidden we use a value of zero.
     *
     * @param Worksheet $sheet The sheet
     * @param int $row The row index (1-based)
     *