vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/Drawing.php

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<?php

namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;

use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use PhpOffice\PhpSpreadsheet\Shared\XMLWriter;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Worksheet\BaseDrawing;
use PhpOffice\PhpSpreadsheet\Worksheet\HeaderFooterDrawing;
use PhpOffice\PhpSpreadsheet\Writer\Exception as WriterException;

class Drawing extends WriterPart
{
    /**
     * Write drawings to XML format.
     *
     * @param bool $includeCharts Flag indicating if we should include drawing details for charts
     *
     * @return string XML Output
     */
    public function writeDrawings(\PhpOffice\PhpSpreadsheet\Worksheet\Worksheet $pWorksheet, $includeCharts = false)
    {
        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
        }

        // XML header
        $objWriter->startDocument('1.0', 'UTF-8', 'yes');

        // xdr:wsDr
        $objWriter->startElement('xdr:wsDr');
        $objWriter->writeAttribute('xmlns:xdr', 'http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing');
        $objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');

        // Loop through images and write drawings
        $i = 1;
        $iterator = $pWorksheet->getDrawingCollection()->getIterator();
        while ($iterator->valid()) {
            /** @var BaseDrawing $pDrawing */
            $pDrawing = $iterator->current();
            $pRelationId = $i;
            $hlinkClickId = $pDrawing->getHyperlink() === null ? null : ++$i;

            $this->writeDrawing($objWriter, $pDrawing, $pRelationId, $hlinkClickId);

            $iterator->next();
            ++$i;
        }

        if ($includeCharts) {
            $chartCount = $pWorksheet->getChartCount();
            // Loop through charts and write the chart position
            if ($chartCount > 0) {
                for ($c = 0; $c < $chartCount; ++$c) {
                    $this->writeChart($objWriter, $pWorksheet->getChartByIndex($c), $c + $i);
                }