Temporary directory is passed to mPDF (#248)

Temporary directory set to PDF writer is passed to mPDF object in constructor.
mPDF 7.0 changed temporary directory configuration from constant to constructor parameter.
Without this change it is not possible to change default temporary directory.

See: https://mpdf.github.io/installation-setup/folders-for-temporary-files.html

Author: KacerCZ

src/PhpSpreadsheet/Helper/Sample.php

@@ -5,6 +5,7 @@
 use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
 use PhpOffice\PhpSpreadsheet\Writer\IWriter;
+use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 use RecursiveDirectoryIterator;
 use RecursiveIteratorIterator;
 use RecursiveRegexIterator;
@@ -118,6 +119,11 @@ public function write(Spreadsheet $spreadsheet, $filename, array $writers = ['Xl
         foreach ($writers as $writerType) {
             $path = $this->getFilename($filename, mb_strtolower($writerType));
             $writer = IOFactory::createWriter($spreadsheet, $writerType);
+            if ($writer instanceof Pdf) {
+                // PDF writer needs temporary directory
+                $tempDir = $this->getTemporaryFolder();
+                $writer->setTempDir($tempDir);
+            }
             $callStartTime = microtime(true);
             $writer->save($path);
             $this->logWrite($writer, $path, $callStartTime);

src/PhpSpreadsheet/Writer/Pdf/MPDF.php

@@ -55,7 +55,8 @@ public function save($pFilename)
         }
 
         //  Create PDF
-        $pdf = new \Mpdf\Mpdf();
+        $config = ['tempDir' => $this->tempDir];
+        $pdf = new \Mpdf\Mpdf($config);
         $ortmp = $orientation;
         $pdf->_setPageSize(strtoupper($paperSize), $ortmp);
         $pdf->DefOrientation = $orientation;