<?php

namespace PhpOffice\PhpSpreadsheet\Writer;

use HTMLPurifier;
use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Cell\Cell;
use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use PhpOffice\PhpSpreadsheet\Chart\Chart;
use PhpOffice\PhpSpreadsheet\RichText\RichText;
use PhpOffice\PhpSpreadsheet\RichText\Run;

> use PhpOffice\PhpSpreadsheet\Settings;


use PhpOffice\PhpSpreadsheet\Shared\Drawing as SharedDrawing;
use PhpOffice\PhpSpreadsheet\Shared\File;
use PhpOffice\PhpSpreadsheet\Shared\Font as SharedFont;
use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Style\Alignment;
use PhpOffice\PhpSpreadsheet\Style\Border;
use PhpOffice\PhpSpreadsheet\Style\Borders;
use PhpOffice\PhpSpreadsheet\Style\Fill;
use PhpOffice\PhpSpreadsheet\Style\Font;
use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
use PhpOffice\PhpSpreadsheet\Style\Style;
use PhpOffice\PhpSpreadsheet\Worksheet\Drawing;
use PhpOffice\PhpSpreadsheet\Worksheet\MemoryDrawing;

> use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;


use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;

class Html extends BaseWriter
{
    /**
     * Spreadsheet object.
     *
     * @var Spreadsheet
     */
    protected $spreadsheet;

    /**
     * Sheet index to write.
     *

<      * @var int



>      * @var null|int


     */
    private $sheetIndex = 0;

    /**
     * Images root.
     *
     * @var string
     */
    private $imagesRoot = '';

    /**
     * embed images, or link to images.
     *
     * @var bool
     */

<     private $embedImages = false;



>     protected $embedImages = false;



    /**
     * Use inline CSS?
     *
     * @var bool
     */
    private $useInlineCss = false;

    /**
     * Use embedded CSS?
     *
     * @var bool
     */
    private $useEmbeddedCSS = true;

    /**
     * Array of CSS styles.
     *
     * @var array
     */
    private $cssStyles;

    /**
     * Array of column widths in points.
     *
     * @var array
     */
    private $columnWidths;

    /**
     * Default font.
     *
     * @var Font
     */
    private $defaultFont;

    /**
     * Flag whether spans have been calculated.
     *
     * @var bool
     */
    private $spansAreCalculated = false;

    /**
     * Excel cells that should not be written as HTML cells.
     *
     * @var array
     */
    private $isSpannedCell = [];

    /**
     * Excel cells that are upper-left corner in a cell merge.
     *
     * @var array
     */
    private $isBaseCell = [];

    /**
     * Excel rows that should not be written as HTML rows.
     *
     * @var array
     */
    private $isSpannedRow = [];

    /**
     * Is the current writer creating PDF?
     *
     * @var bool
     */
    protected $isPdf = false;

    /**

>      * Is the current writer creating mPDF?
     * Generate the Navigation block.
>      *
     *
>      * @var bool
     * @var bool
>      */
     */
>     protected $isMPdf = false;
    private $generateSheetNavigationBlock = true;
> 

>     /**


    /**
     * Callback for editing generated html.
     *
     * @var null|callable
     */
    private $editHtmlCallback;

    /**
     * Create a new HTML.
     */
    public function __construct(Spreadsheet $spreadsheet)
    {
        $this->spreadsheet = $spreadsheet;
        $this->defaultFont = $this->spreadsheet->getDefaultStyle()->getFont();
    }

    /**
     * Save Spreadsheet to file.
     *

<      * @param resource|string $pFilename



>      * @param resource|string $filename


     */

<     public function save($pFilename): void



>     public function save($filename, int $flags = 0): void


    {

>         $this->processFlags($flags);
        // Open file
> 



<         $this->openFileHandle($pFilename);



>         $this->openFileHandle($filename);



        // Write html
        fwrite($this->fileHandle, $this->generateHTMLAll());

        // Close file
        $this->maybeCloseFileHandle();
    }

    /**
     * Save Spreadsheet as html to variable.
     *
     * @return string
     */
    public function generateHtmlAll()
    {
        // garbage collect
        $this->spreadsheet->garbageCollect();

        $saveDebugLog = Calculation::getInstance($this->spreadsheet)->getDebugLog()->getWriteDebugLog();
        Calculation::getInstance($this->spreadsheet)->getDebugLog()->setWriteDebugLog(false);
        $saveArrayReturnType = Calculation::getArrayReturnType();
        Calculation::setArrayReturnType(Calculation::RETURN_ARRAY_AS_VALUE);

        // Build CSS
        $this->buildCSS(!$this->useInlineCss);

        $html = '';

        // Write headers
        $html .= $this->generateHTMLHeader(!$this->useInlineCss);

        // Write navigation (tabs)
        if ((!$this->isPdf) && ($this->generateSheetNavigationBlock)) {
            $html .= $this->generateNavigation();
        }

        // Write data
        $html .= $this->generateSheetData();

        // Write footer
        $html .= $this->generateHTMLFooter();
        $callback = $this->editHtmlCallback;
        if ($callback) {
            $html = $callback($html);
        }

        Calculation::setArrayReturnType($saveArrayReturnType);
        Calculation::getInstance($this->spreadsheet)->getDebugLog()->setWriteDebugLog($saveDebugLog);

        return $html;
    }

    /**
     * Set a callback to edit the entire HTML.
     *
     * The callback must accept the HTML as string as first parameter,
     * and it must return the edited HTML as string.
     */
    public function setEditHtmlCallback(?callable $callback): void
    {
        $this->editHtmlCallback = $callback;
    }


<     const VALIGN_ARR = [
<         Alignment::VERTICAL_BOTTOM => 'bottom',
<         Alignment::VERTICAL_TOP => 'top',
<         Alignment::VERTICAL_CENTER => 'middle',
<         Alignment::VERTICAL_JUSTIFY => 'middle',
<     ];
< 


    /**
     * Map VAlign.
     *
     * @param string $vAlign Vertical alignment
     *
     * @return string
     */
    private function mapVAlign($vAlign)
    {

<         return array_key_exists($vAlign, self::VALIGN_ARR) ? self::VALIGN_ARR[$vAlign] : 'baseline';



>         return Alignment::VERTICAL_ALIGNMENT_FOR_HTML[$vAlign] ?? '';


    }


<     const HALIGN_ARR = [
<         Alignment::HORIZONTAL_LEFT => 'left',
<         Alignment::HORIZONTAL_RIGHT => 'right',
<         Alignment::HORIZONTAL_CENTER => 'center',
<         Alignment::HORIZONTAL_CENTER_CONTINUOUS => 'center',
<         Alignment::HORIZONTAL_JUSTIFY => 'justify',
<     ];
< 


    /**
     * Map HAlign.
     *
     * @param string $hAlign Horizontal alignment
     *
     * @return string
     */
    private function mapHAlign($hAlign)
    {

<         return array_key_exists($hAlign, self::HALIGN_ARR) ? self::HALIGN_ARR[$hAlign] : '';



>         return Alignment::HORIZONTAL_ALIGNMENT_FOR_HTML[$hAlign] ?? '';


    }

    const BORDER_ARR = [
        Border::BORDER_NONE => 'none',
        Border::BORDER_DASHDOT => '1px dashed',
        Border::BORDER_DASHDOTDOT => '1px dotted',
        Border::BORDER_DASHED => '1px dashed',
        Border::BORDER_DOTTED => '1px dotted',
        Border::BORDER_DOUBLE => '3px double',
        Border::BORDER_HAIR => '1px solid',
        Border::BORDER_MEDIUM => '2px solid',
        Border::BORDER_MEDIUMDASHDOT => '2px dashed',
        Border::BORDER_MEDIUMDASHDOTDOT => '2px dotted',
        Border::BORDER_SLANTDASHDOT => '2px dashed',
        Border::BORDER_THICK => '3px solid',
    ];

    /**
     * Map border style.
     *

<      * @param int $borderStyle Sheet index



>      * @param int|string $borderStyle Sheet index


     *
     * @return string
     */
    private function mapBorderStyle($borderStyle)
    {
        return array_key_exists($borderStyle, self::BORDER_ARR) ? self::BORDER_ARR[$borderStyle] : '1px solid';
    }

    /**
     * Get sheet index.

<      *
<      * @return int


     */

<     public function getSheetIndex()



>     public function getSheetIndex(): ?int


    {
        return $this->sheetIndex;
    }

    /**
     * Set sheet index.
     *

<      * @param int $pValue Sheet index



>      * @param int $sheetIndex Sheet index


     *
     * @return $this
     */

<     public function setSheetIndex($pValue)



>     public function setSheetIndex($sheetIndex)


    {

<         $this->sheetIndex = $pValue;



>         $this->sheetIndex = $sheetIndex;



        return $this;
    }

    /**
     * Get sheet index.
     *
     * @return bool
     */
    public function getGenerateSheetNavigationBlock()
    {
        return $this->generateSheetNavigationBlock;
    }

    /**
     * Set sheet index.
     *

<      * @param bool $pValue Flag indicating whether the sheet navigation block should be generated or not



>      * @param bool $generateSheetNavigationBlock Flag indicating whether the sheet navigation block should be generated or not


     *
     * @return $this
     */

<     public function setGenerateSheetNavigationBlock($pValue)



>     public function setGenerateSheetNavigationBlock($generateSheetNavigationBlock)


    {

<         $this->generateSheetNavigationBlock = (bool) $pValue;



>         $this->generateSheetNavigationBlock = (bool) $generateSheetNavigationBlock;



        return $this;
    }

    /**
     * Write all sheets (resets sheetIndex to NULL).
     *
     * @return $this
     */
    public function writeAllSheets()
    {
        $this->sheetIndex = null;

        return $this;
    }


<     private static function generateMeta($val, $desc)



>     private static function generateMeta(?string $val, string $desc): string


    {

<         return $val ? ('      <meta name="' . $desc . '" content="' . htmlspecialchars($val) . '" />' . PHP_EOL) : '';



>         return $val
>             ? ('      <meta name="' . $desc . '" content="' . htmlspecialchars($val, Settings::htmlEntityFlags()) . '" />' . PHP_EOL)
>             : '';


    }


>     public const BODY_LINE = '  <body>' . PHP_EOL;
    /**
> 


     * Generate HTML header.
     *

<      * @param bool $pIncludeStyles Include styles?



>      * @param bool $includeStyles Include styles?


     *
     * @return string
     */

<     public function generateHTMLHeader($pIncludeStyles = false)



>     public function generateHTMLHeader($includeStyles = false)


    {
        // Construct HTML
        $properties = $this->spreadsheet->getProperties();
        $html = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">' . PHP_EOL;
        $html .= '<html xmlns="http://www.w3.org/1999/xhtml">' . PHP_EOL;
        $html .= '  <head>' . PHP_EOL;
        $html .= '      <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />' . PHP_EOL;
        $html .= '      <meta name="generator" content="PhpSpreadsheet, https://github.com/PHPOffice/PhpSpreadsheet" />' . PHP_EOL;

<         $html .= '      <title>' . htmlspecialchars($properties->getTitle()) . '</title>' . PHP_EOL;



>         $html .= '      <title>' . htmlspecialchars($properties->getTitle(), Settings::htmlEntityFlags()) . '</title>' . PHP_EOL;


        $html .= self::generateMeta($properties->getCreator(), 'author');
        $html .= self::generateMeta($properties->getTitle(), 'title');
        $html .= self::generateMeta($properties->getDescription(), 'description');
        $html .= self::generateMeta($properties->getSubject(), 'subject');
        $html .= self::generateMeta($properties->getKeywords(), 'keywords');
        $html .= self::generateMeta($properties->getCategory(), 'category');
        $html .= self::generateMeta($properties->getCompany(), 'company');
        $html .= self::generateMeta($properties->getManager(), 'manager');


<         $html .= $pIncludeStyles ? $this->generateStyles(true) : $this->generatePageDeclarations(true);



>         $html .= $includeStyles ? $this->generateStyles(true) : $this->generatePageDeclarations(true);



        $html .= '  </head>' . PHP_EOL;
        $html .= '' . PHP_EOL;

<         $html .= '  <body>' . PHP_EOL;



>         $html .= self::BODY_LINE;



        return $html;
    }


<     private function generateSheetPrep()



>     private function generateSheetPrep(): array


    {
        // Ensure that Spans have been calculated?
        $this->calculateSpans();

        // Fetch sheets
        if ($this->sheetIndex === null) {
            $sheets = $this->spreadsheet->getAllSheets();
        } else {
            $sheets = [$this->spreadsheet->getSheet($this->sheetIndex)];
        }

        return $sheets;
    }


<     private function generateSheetStarts($sheet, $rowMin)



>     private function generateSheetStarts(Worksheet $sheet, int $rowMin): array


    {
        // calculate start of <tbody>, <thead>
        $tbodyStart = $rowMin;
        $theadStart = $theadEnd = 0; // default: no <thead>    no </thead>
        if ($sheet->getPageSetup()->isRowsToRepeatAtTopSet()) {
            $rowsToRepeatAtTop = $sheet->getPageSetup()->getRowsToRepeatAtTop();

            // we can only support repeating rows that start at top row
            if ($rowsToRepeatAtTop[0] == 1) {
                $theadStart = $rowsToRepeatAtTop[0];
                $theadEnd = $rowsToRepeatAtTop[1];
                $tbodyStart = $rowsToRepeatAtTop[1] + 1;
            }
        }

        return [$theadStart, $theadEnd, $tbodyStart];
    }


<     private function generateSheetTags($row, $theadStart, $theadEnd, $tbodyStart)



>     private function generateSheetTags(int $row, int $theadStart, int $theadEnd, int $tbodyStart): array


    {
        // <thead> ?
        $startTag = ($row == $theadStart) ? ('        <thead>' . PHP_EOL) : '';
        if (!$startTag) {
            $startTag = ($row == $tbodyStart) ? ('        <tbody>' . PHP_EOL) : '';
        }
        $endTag = ($row == $theadEnd) ? ('        </thead>' . PHP_EOL) : '';
        $cellType = ($row >= $tbodyStart) ? 'td' : 'th';

        return [$cellType, $startTag, $endTag];
    }

    /**
     * Generate sheet data.
     *
     * @return string
     */
    public function generateSheetData()
    {
        $sheets = $this->generateSheetPrep();

        // Construct HTML
        $html = '';

        // Loop all sheets
        $sheetId = 0;
        foreach ($sheets as $sheet) {
            // Write table header
            $html .= $this->generateTableHeader($sheet);

            // Get worksheet dimension
            [$min, $max] = explode(':', $sheet->calculateWorksheetDataDimension());

<             [$minCol, $minRow] = Coordinate::coordinateFromString($min);
<             $minCol = Coordinate::columnIndexFromString($minCol);
<             [$maxCol, $maxRow] = Coordinate::coordinateFromString($max);
<             $maxCol = Coordinate::columnIndexFromString($maxCol);



>             [$minCol, $minRow] = Coordinate::indexesFromString($min);
>             [$maxCol, $maxRow] = Coordinate::indexesFromString($max);



            [$theadStart, $theadEnd, $tbodyStart] = $this->generateSheetStarts($sheet, $minRow);

            // Loop through cells
            $row = $minRow - 1;
            while ($row++ < $maxRow) {
                [$cellType, $startTag, $endTag] = $this->generateSheetTags($row, $theadStart, $theadEnd, $tbodyStart);
                $html .= $startTag;

                // Write row if there are HTML table cells in it
                if (!isset($this->isSpannedRow[$sheet->getParent()->getIndex($sheet)][$row])) {
                    // Start a new rowData
                    $rowData = [];
                    // Loop through columns
                    $column = $minCol;
                    while ($column <= $maxCol) {
                        // Cell exists?

<                         if ($sheet->cellExistsByColumnAndRow($column, $row)) {
<                             $rowData[$column] = Coordinate::stringFromColumnIndex($column) . $row;
<                         } else {
<                             $rowData[$column] = '';
<                         }
<                         ++$column;



>                         $cellAddress = Coordinate::stringFromColumnIndex($column) . $row;
>                         $rowData[$column++] = ($sheet->getCellCollection()->has($cellAddress)) ? $cellAddress : '';


                    }
                    $html .= $this->generateRow($sheet, $rowData, $row - 1, $cellType);
                }

                $html .= $endTag;
            }

>             --$row;


            $html .= $this->extendRowsForChartsAndImages($sheet, $row);

            // Write table footer
            $html .= $this->generateTableFooter();
            // Writing PDF?
            if ($this->isPdf && $this->useInlineCss) {
                if ($this->sheetIndex === null && $sheetId + 1 < $this->spreadsheet->getSheetCount()) {
                    $html .= '<div style="page-break-before:always" ></div>';
                }
            }

            // Next sheet
            ++$sheetId;
        }

        return $html;
    }

    /**
     * Generate sheet tabs.
     *
     * @return string
     */
    public function generateNavigation()
    {
        // Fetch sheets
        $sheets = [];
        if ($this->sheetIndex === null) {
            $sheets = $this->spreadsheet->getAllSheets();
        } else {
            $sheets[] = $this->spreadsheet->getSheet($this->sheetIndex);
        }

        // Construct HTML
        $html = '';

        // Only if there are more than 1 sheets
        if (count($sheets) > 1) {
            // Loop all sheets
            $sheetId = 0;

            $html .= '<ul class="navigation">' . PHP_EOL;

            foreach ($sheets as $sheet) {
                $html .= '  <li class="sheet' . $sheetId . '"><a href="#sheet' . $sheetId . '">' . $sheet->getTitle() . '</a></li>' . PHP_EOL;
                ++$sheetId;
            }

            $html .= '</ul>' . PHP_EOL;
        }

        return $html;
    }

    /**
     * Extend Row if chart is placed after nominal end of row.
     * This code should be exercised by sample:
     * Chart/32_Chart_read_write_PDF.php.

<      * However, that test is suppressed due to out-of-date
<      * Jpgraph code issuing warnings. So, don't measure
<      * code coverage for this function till that is fixed.


     *

<      * @param Worksheet $pSheet \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet


     * @param int $row Row to check for charts
     *
     * @return array

<      *
<      * @codeCoverageIgnore


     */

<     private function extendRowsForCharts(Worksheet $pSheet, int $row)



>     private function extendRowsForCharts(Worksheet $worksheet, int $row)


    {
        $rowMax = $row;
        $colMax = 'A';
        $anyfound = false;
        if ($this->includeCharts) {

<             foreach ($pSheet->getChartCollection() as $chart) {



>             foreach ($worksheet->getChartCollection() as $chart) {


                if ($chart instanceof Chart) {
                    $anyfound = true;
                    $chartCoordinates = $chart->getTopLeftPosition();
                    $chartTL = Coordinate::coordinateFromString($chartCoordinates['cell']);
                    $chartCol = Coordinate::columnIndexFromString($chartTL[0]);
                    if ($chartTL[1] > $rowMax) {
                        $rowMax = $chartTL[1];
                        if ($chartCol > Coordinate::columnIndexFromString($colMax)) {
                            $colMax = $chartTL[0];
                        }
                    }
                }
            }
        }

        return [$rowMax, $colMax, $anyfound];
    }


<     private function extendRowsForChartsAndImages(Worksheet $pSheet, int $row): string



>     private function extendRowsForChartsAndImages(Worksheet $worksheet, int $row): string


    {

<         [$rowMax, $colMax, $anyfound] = $this->extendRowsForCharts($pSheet, $row);



>         [$rowMax, $colMax, $anyfound] = $this->extendRowsForCharts($worksheet, $row);




<         foreach ($pSheet->getDrawingCollection() as $drawing) {



>         foreach ($worksheet->getDrawingCollection() as $drawing) {


            $anyfound = true;
            $imageTL = Coordinate::coordinateFromString($drawing->getCoordinates());
            $imageCol = Coordinate::columnIndexFromString($imageTL[0]);
            if ($imageTL[1] > $rowMax) {
                $rowMax = $imageTL[1];
                if ($imageCol > Coordinate::columnIndexFromString($colMax)) {
                    $colMax = $imageTL[0];
                }
            }
        }

        // Don't extend rows if not needed
        if ($row === $rowMax || !$anyfound) {
            return '';
        }

        $html = '';
        ++$colMax;
        ++$row;
        while ($row <= $rowMax) {
            $html .= '<tr>';
            for ($col = 'A'; $col != $colMax; ++$col) {

<                 $htmlx = $this->writeImageInCell($pSheet, $col . $row);
<                 $htmlx .= $this->includeCharts ? $this->writeChartInCell($pSheet, $col . $row) : '';



>                 $htmlx = $this->writeImageInCell($worksheet, $col . $row);
>                 $htmlx .= $this->includeCharts ? $this->writeChartInCell($worksheet, $col . $row) : '';


                if ($htmlx) {
                    $html .= "<td class='style0' style='position: relative;'>$htmlx</td>";
                } else {
                    $html .= "<td class='style0'></td>";
                }
            }
            ++$row;
            $html .= '</tr>' . PHP_EOL;
        }

        return $html;
    }

    /**
     * Convert Windows file name to file protocol URL.
     *
     * @param string $filename file name on local system
     *
     * @return string
     */

<     public static function winFileToUrl($filename)



>     public static function winFileToUrl($filename, bool $mpdf = false)


    {
        // Windows filename
        if (substr($filename, 1, 2) === ':\\') {

<             $filename = 'file:///' . str_replace('\\', '/', $filename);



>             $protocol = $mpdf ? '' : 'file:///';
>             $filename = $protocol . str_replace('\\', '/', $filename);


        }

        return $filename;
    }

    /**
     * Generate image tag in cell.
     *

<      * @param Worksheet $pSheet \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet



>      * @param Worksheet $worksheet \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet


     * @param string $coordinates Cell coordinates
     *
     * @return string
     */

<     private function writeImageInCell(Worksheet $pSheet, $coordinates)



>     private function writeImageInCell(Worksheet $worksheet, $coordinates)


    {
        // Construct HTML
        $html = '';

        // Write images

<         foreach ($pSheet->getDrawingCollection() as $drawing) {



>         foreach ($worksheet->getDrawingCollection() as $drawing) {


            if ($drawing->getCoordinates() != $coordinates) {
                continue;
            }
            $filedesc = $drawing->getDescription();
            $filedesc = $filedesc ? htmlspecialchars($filedesc, ENT_QUOTES) : 'Embedded image';
            if ($drawing instanceof Drawing) {
                $filename = $drawing->getPath();

                // Strip off eventual '.'

<                 $filename = preg_replace('/^[.]/', '', $filename);



>                 $filename = (string) preg_replace('/^[.]/', '', $filename);



                // Prepend images root
                $filename = $this->getImagesRoot() . $filename;

                // Strip off eventual '.' if followed by non-/

<                 $filename = preg_replace('@^[.]([^/])@', '$1', $filename);



>                 $filename = (string) preg_replace('@^[.]([^/])@', '$1', $filename);



                // Convert UTF8 data to PCDATA

<                 $filename = htmlspecialchars($filename);



>                 $filename = htmlspecialchars($filename, Settings::htmlEntityFlags());



                $html .= PHP_EOL;

<                 $imageData = self::winFileToUrl($filename);



>                 $imageData = self::winFileToUrl($filename, $this->isMPdf);




<                 if ($this->embedImages && !$this->isPdf) {



>                 if ($this->embedImages || substr($imageData, 0, 6) === 'zip://') {


                    $picture = @file_get_contents($filename);
                    if ($picture !== false) {

<                         $imageDetails = getimagesize($filename);



>                         $imageDetails = getimagesize($filename) ?: [];


                        // base64 encode the binary data
                        $base64 = base64_encode($picture);
                        $imageData = 'data:' . $imageDetails['mime'] . ';base64,' . $base64;
                    }
                }

                $html .= '<img style="position: absolute; z-index: 1; left: ' .
                    $drawing->getOffsetX() . 'px; top: ' . $drawing->getOffsetY() . 'px; width: ' .
                    $drawing->getWidth() . 'px; height: ' . $drawing->getHeight() . 'px;" src="' .
                    $imageData . '" alt="' . $filedesc . '" />';
            } elseif ($drawing instanceof MemoryDrawing) {

>                 $imageResource = $drawing->getImageResource();
                ob_start(); //  Let's start output buffering.
>                 if ($imageResource) {



<                 imagepng($drawing->getImageResource()); //  This will normally output the image, but because of ob_start(), it won't.
<                 $contents = ob_get_contents(); //  Instead, output above is saved to $contents



>                     imagepng($imageResource); //  This will normally output the image, but because of ob_start(), it won't.
>                     $contents = (string) ob_get_contents(); //  Instead, output above is saved to $contents


                ob_end_clean(); //  End the output buffer.


<                 $dataUri = 'data:image/jpeg;base64,' . base64_encode($contents);



>                     $dataUri = 'data:image/png;base64,' . base64_encode($contents);



                //  Because of the nature of tables, width is more important than height.
                //  max-width: 100% ensures that image doesnt overflow containing cell
                //  width: X sets width of supplied image.
                //  As a result, images bigger than cell will be contained and images smaller will not get stretched
                $html .= '<img alt="' . $filedesc . '" src="' . $dataUri . '" style="max-width:100%;width:' . $drawing->getWidth() . 'px;" />';
            }
        }

>         }



        return $html;
    }

    /**
     * Generate chart tag in cell.
     * This code should be exercised by sample:
     * Chart/32_Chart_read_write_PDF.php.

<      * However, that test is suppressed due to out-of-date
<      * Jpgraph code issuing warnings. So, don't measure
<      * code coverage for this function till that is fixed.
<      *
<      * @param Worksheet $pSheet \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet
<      * @param string $coordinates Cell coordinates
<      *
<      * @return string
<      *
<      * @codeCoverageIgnore


     */

<     private function writeChartInCell(Worksheet $pSheet, $coordinates)



>     private function writeChartInCell(Worksheet $worksheet, string $coordinates): string


    {
        // Construct HTML
        $html = '';

        // Write charts

<         foreach ($pSheet->getChartCollection() as $chart) {



>         foreach ($worksheet->getChartCollection() as $chart) {


            if ($chart instanceof Chart) {
                $chartCoordinates = $chart->getTopLeftPosition();
                if ($chartCoordinates['cell'] == $coordinates) {
                    $chartFileName = File::sysGetTempDir() . '/' . uniqid('', true) . '.png';
                    if (!$chart->render($chartFileName)) {

<                         return;



>                         return '';


                    }

                    $html .= PHP_EOL;

<                     $imageDetails = getimagesize($chartFileName);



>                     $imageDetails = getimagesize($chartFileName) ?: [];


                    $filedesc = $chart->getTitle();

<                     $filedesc = $filedesc ? self::getChartCaption($filedesc->getCaption()) : '';



>                     $filedesc = $filedesc ? $filedesc->getCaptionText() : '';


                    $filedesc = $filedesc ? htmlspecialchars($filedesc, ENT_QUOTES) : 'Embedded chart';

<                     if ($fp = fopen($chartFileName, 'rb', 0)) {
<                         $picture = fread($fp, filesize($chartFileName));
<                         fclose($fp);
<                         // base64 encode the binary data



>                     $picture = file_get_contents($chartFileName);
>                     if ($picture !== false) {


                        $base64 = base64_encode($picture);
                        $imageData = 'data:' . $imageDetails['mime'] . ';base64,' . $base64;

                        $html .= '<img style="position: absolute; z-index: 1; left: ' . $chartCoordinates['xOffset'] . 'px; top: ' . $chartCoordinates['yOffset'] . 'px; width: ' . $imageDetails[0] . 'px; height: ' . $imageDetails[1] . 'px;" src="' . $imageData . '" alt="' . $filedesc . '" />' . PHP_EOL;

< 
<                         unlink($chartFileName);


                    }

>                     unlink($chartFileName);


                }
            }
        }

        // Return
        return $html;
    }

    /**

<      * Extend Row if chart is placed after nominal end of row.
<      * This code should be exercised by sample:
<      * Chart/32_Chart_read_write_PDF.php.
<      * However, that test is suppressed due to out-of-date
<      * Jpgraph code issuing warnings. So, don't measure
<      * code coverage for this function till that is fixed.
<      * Caption is described in documentation as fixed,
<      * but in 32_Chart it is somehow an array of RichText.
<      *
<      * @param mixed $cap
<      *
<      * @return string
<      *
<      * @codeCoverageIgnore
<      */
<     private static function getChartCaption($cap)
<     {
<         return is_array($cap) ? implode(' ', $cap) : $cap;
<     }
< 
<     /**


     * Generate CSS styles.
     *
     * @param bool $generateSurroundingHTML Generate surrounding HTML tags? (&lt;style&gt; and &lt;/style&gt;)
     *
     * @return string
     */
    public function generateStyles($generateSurroundingHTML = true)
    {
        // Build CSS
        $css = $this->buildCSS($generateSurroundingHTML);

        // Construct HTML
        $html = '';

        // Start styles
        if ($generateSurroundingHTML) {
            $html .= '    <style type="text/css">' . PHP_EOL;
            $html .= (array_key_exists('html', $css)) ? ('      html { ' . $this->assembleCSS($css['html']) . ' }' . PHP_EOL) : '';
        }

        // Write all other styles
        foreach ($css as $styleName => $styleDefinition) {
            if ($styleName != 'html') {
                $html .= '      ' . $styleName . ' { ' . $this->assembleCSS($styleDefinition) . ' }' . PHP_EOL;
            }
        }
        $html .= $this->generatePageDeclarations(false);

        // End styles
        if ($generateSurroundingHTML) {
            $html .= '    </style>' . PHP_EOL;
        }

        // Return
        return $html;
    }

    private function buildCssRowHeights(Worksheet $sheet, array &$css, int $sheetIndex): void
    {
        // Calculate row heights
        foreach ($sheet->getRowDimensions() as $rowDimension) {
            $row = $rowDimension->getRowIndex() - 1;

            // table.sheetN tr.rowYYYYYY { }
            $css['table.sheet' . $sheetIndex . ' tr.row' . $row] = [];

            if ($rowDimension->getRowHeight() != -1) {
                $pt_height = $rowDimension->getRowHeight();
                $css['table.sheet' . $sheetIndex . ' tr.row' . $row]['height'] = $pt_height . 'pt';
            }
            if ($rowDimension->getVisible() === false) {
                $css['table.sheet' . $sheetIndex . ' tr.row' . $row]['display'] = 'none';
                $css['table.sheet' . $sheetIndex . ' tr.row' . $row]['visibility'] = 'hidden';
            }
        }
    }

    private function buildCssPerSheet(Worksheet $sheet, array &$css): void
    {
        // Calculate hash code
        $sheetIndex = $sheet->getParent()->getIndex($sheet);

        // Build styles
        // Calculate column widths
        $sheet->calculateColumnWidths();

        // col elements, initialize
        $highestColumnIndex = Coordinate::columnIndexFromString($sheet->getHighestColumn()) - 1;
        $column = -1;
        while ($column++ < $highestColumnIndex) {
            $this->columnWidths[$sheetIndex][$column] = 42; // approximation
            $css['table.sheet' . $sheetIndex . ' col.col' . $column]['width'] = '42pt';
        }

        // col elements, loop through columnDimensions and set width
        foreach ($sheet->getColumnDimensions() as $columnDimension) {
            $column = Coordinate::columnIndexFromString($columnDimension->getColumnIndex()) - 1;
            $width = SharedDrawing::cellDimensionToPixels($columnDimension->getWidth(), $this->defaultFont);
            $width = SharedDrawing::pixelsToPoints($width);
            if ($columnDimension->getVisible() === false) {
                $css['table.sheet' . $sheetIndex . ' .column' . $column]['display'] = 'none';
            }
            if ($width >= 0) {
                $this->columnWidths[$sheetIndex][$column] = $width;
                $css['table.sheet' . $sheetIndex . ' col.col' . $column]['width'] = $width . 'pt';
            }
        }

        // Default row height
        $rowDimension = $sheet->getDefaultRowDimension();

        // table.sheetN tr { }
        $css['table.sheet' . $sheetIndex . ' tr'] = [];

        if ($rowDimension->getRowHeight() == -1) {
            $pt_height = SharedFont::getDefaultRowHeightByFont($this->spreadsheet->getDefaultStyle()->getFont());
        } else {
            $pt_height = $rowDimension->getRowHeight();
        }
        $css['table.sheet' . $sheetIndex . ' tr']['height'] = $pt_height . 'pt';
        if ($rowDimension->getVisible() === false) {
            $css['table.sheet' . $sheetIndex . ' tr']['display'] = 'none';
            $css['table.sheet' . $sheetIndex . ' tr']['visibility'] = 'hidden';
        }

        $this->buildCssRowHeights($sheet, $css, $sheetIndex);
    }

    /**
     * Build CSS styles.
     *
     * @param bool $generateSurroundingHTML Generate surrounding HTML style? (html { })
     *
     * @return array
     */
    public function buildCSS($generateSurroundingHTML = true)
    {
        // Cached?
        if ($this->cssStyles !== null) {
            return $this->cssStyles;
        }

        // Ensure that spans have been calculated
        $this->calculateSpans();

        // Construct CSS
        $css = [];

        // Start styles
        if ($generateSurroundingHTML) {
            // html { }
            $css['html']['font-family'] = 'Calibri, Arial, Helvetica, sans-serif';
            $css['html']['font-size'] = '11pt';
            $css['html']['background-color'] = 'white';
        }

        // CSS for comments as found in LibreOffice
        $css['a.comment-indicator:hover + div.comment'] = [
            'background' => '#ffd',
            'position' => 'absolute',
            'display' => 'block',
            'border' => '1px solid black',
            'padding' => '0.5em',
        ];

        $css['a.comment-indicator'] = [
            'background' => 'red',
            'display' => 'inline-block',
            'border' => '1px solid black',
            'width' => '0.5em',
            'height' => '0.5em',
        ];

        $css['div.comment']['display'] = 'none';

        // table { }
        $css['table']['border-collapse'] = 'collapse';

        // .b {}
        $css['.b']['text-align'] = 'center'; // BOOL

        // .e {}
        $css['.e']['text-align'] = 'center'; // ERROR

        // .f {}
        $css['.f']['text-align'] = 'right'; // FORMULA

        // .inlineStr {}
        $css['.inlineStr']['text-align'] = 'left'; // INLINE

        // .n {}
        $css['.n']['text-align'] = 'right'; // NUMERIC

        // .s {}
        $css['.s']['text-align'] = 'left'; // STRING

        // Calculate cell style hashes
        foreach ($this->spreadsheet->getCellXfCollection() as $index => $style) {

<             $css['td.style' . $index] = $this->createCSSStyle($style);
<             $css['th.style' . $index] = $this->createCSSStyle($style);



>             $css['td.style' . $index . ', th.style' . $index] = $this->createCSSStyle($style);
>             //$css['th.style' . $index] = $this->createCSSStyle($style);


        }

        // Fetch sheets
        $sheets = [];
        if ($this->sheetIndex === null) {
            $sheets = $this->spreadsheet->getAllSheets();
        } else {
            $sheets[] = $this->spreadsheet->getSheet($this->sheetIndex);
        }

        // Build styles per sheet
        foreach ($sheets as $sheet) {
            $this->buildCssPerSheet($sheet, $css);
        }

        // Cache
        if ($this->cssStyles === null) {
            $this->cssStyles = $css;
        }

        // Return
        return $css;
    }

    /**
     * Create CSS style.
     *
     * @return array
     */

<     private function createCSSStyle(Style $pStyle)



>     private function createCSSStyle(Style $style)


    {
        // Create CSS
        return array_merge(

<             $this->createCSSStyleAlignment($pStyle->getAlignment()),
<             $this->createCSSStyleBorders($pStyle->getBorders()),
<             $this->createCSSStyleFont($pStyle->getFont()),
<             $this->createCSSStyleFill($pStyle->getFill())



>             $this->createCSSStyleAlignment($style->getAlignment()),
>             $this->createCSSStyleBorders($style->getBorders()),
>             $this->createCSSStyleFont($style->getFont()),
>             $this->createCSSStyleFill($style->getFill())


        );
    }

    /**

<      * Create CSS style (\PhpOffice\PhpSpreadsheet\Style\Alignment).
<      *
<      * @param Alignment $pStyle \PhpOffice\PhpSpreadsheet\Style\Alignment



>      * Create CSS style.


     *
     * @return array
     */

<     private function createCSSStyleAlignment(Alignment $pStyle)



>     private function createCSSStyleAlignment(Alignment $alignment)


    {
        // Construct CSS
        $css = [];

        // Create CSS

<         $css['vertical-align'] = $this->mapVAlign($pStyle->getVertical());
<         $textAlign = $this->mapHAlign($pStyle->getHorizontal());



>         $verticalAlign = $this->mapVAlign($alignment->getVertical() ?? '');
>         if ($verticalAlign) {
>             $css['vertical-align'] = $verticalAlign;
>         }
>         $textAlign = $this->mapHAlign($alignment->getHorizontal() ?? '');


        if ($textAlign) {
            $css['text-align'] = $textAlign;
            if (in_array($textAlign, ['left', 'right'])) {

<                 $css['padding-' . $textAlign] = (string) ((int) $pStyle->getIndent() * 9) . 'px';



>                 $css['padding-' . $textAlign] = (string) ((int) $alignment->getIndent() * 9) . 'px';
>             }
>         }
>         $rotation = $alignment->getTextRotation();
>         if ($rotation !== 0 && $rotation !== Alignment::TEXTROTATION_STACK_PHPSPREADSHEET) {
>             if ($this->isMPdf) {
>                 $css['text-rotate'] = "$rotation";
>             } else {
>                 $css['transform'] = "rotate({$rotation}deg)";


            }
        }

        return $css;
    }

    /**

<      * Create CSS style (\PhpOffice\PhpSpreadsheet\Style\Font).



>      * Create CSS style.


     *
     * @return array
     */

<     private function createCSSStyleFont(Font $pStyle)



>     private function createCSSStyleFont(Font $font)


    {
        // Construct CSS
        $css = [];

        // Create CSS

<         if ($pStyle->getBold()) {



>         if ($font->getBold()) {


            $css['font-weight'] = 'bold';
        }

<         if ($pStyle->getUnderline() != Font::UNDERLINE_NONE && $pStyle->getStrikethrough()) {



>         if ($font->getUnderline() != Font::UNDERLINE_NONE && $font->getStrikethrough()) {


            $css['text-decoration'] = 'underline line-through';

<         } elseif ($pStyle->getUnderline() != Font::UNDERLINE_NONE) {



>         } elseif ($font->getUnderline() != Font::UNDERLINE_NONE) {


            $css['text-decoration'] = 'underline';

<         } elseif ($pStyle->getStrikethrough()) {



>         } elseif ($font->getStrikethrough()) {


            $css['text-decoration'] = 'line-through';
        }

<         if ($pStyle->getItalic()) {



>         if ($font->getItalic()) {


            $css['font-style'] = 'italic';
        }


<         $css['color'] = '#' . $pStyle->getColor()->getRGB();
<         $css['font-family'] = '\'' . $pStyle->getName() . '\'';
<         $css['font-size'] = $pStyle->getSize() . 'pt';



>         $css['color'] = '#' . $font->getColor()->getRGB();
>         $css['font-family'] = '\'' . $font->getName() . '\'';
>         $css['font-size'] = $font->getSize() . 'pt';



        return $css;
    }

    /**

<      * Create CSS style (Borders).



>      * Create CSS style.


     *

<      * @param Borders $pStyle Borders



>      * @param Borders $borders Borders


     *
     * @return array
     */

<     private function createCSSStyleBorders(Borders $pStyle)



>     private function createCSSStyleBorders(Borders $borders)


    {
        // Construct CSS
        $css = [];

        // Create CSS

<         $css['border-bottom'] = $this->createCSSStyleBorder($pStyle->getBottom());
<         $css['border-top'] = $this->createCSSStyleBorder($pStyle->getTop());
<         $css['border-left'] = $this->createCSSStyleBorder($pStyle->getLeft());
<         $css['border-right'] = $this->createCSSStyleBorder($pStyle->getRight());



>         $css['border-bottom'] = $this->createCSSStyleBorder($borders->getBottom());
>         $css['border-top'] = $this->createCSSStyleBorder($borders->getTop());
>         $css['border-left'] = $this->createCSSStyleBorder($borders->getLeft());
>         $css['border-right'] = $this->createCSSStyleBorder($borders->getRight());



        return $css;
    }

    /**

<      * Create CSS style (Border).
<      *
<      * @param Border $pStyle Border



>      * Create CSS style.


     *

<      * @return string



>      * @param Border $border Border


     */

<     private function createCSSStyleBorder(Border $pStyle)



>     private function createCSSStyleBorder(Border $border): string


    {
        //    Create CSS - add !important to non-none border styles for merged cells

<         $borderStyle = $this->mapBorderStyle($pStyle->getBorderStyle());



>         $borderStyle = $this->mapBorderStyle($border->getBorderStyle());




<         return $borderStyle . ' #' . $pStyle->getColor()->getRGB() . (($borderStyle == 'none') ? '' : ' !important');



>         return $borderStyle . ' #' . $border->getColor()->getRGB() . (($borderStyle == 'none') ? '' : ' !important');


    }

    /**
     * Create CSS style (Fill).
     *

<      * @param Fill $pStyle Fill



>      * @param Fill $fill Fill


     *
     * @return array
     */

<     private function createCSSStyleFill(Fill $pStyle)



>     private function createCSSStyleFill(Fill $fill)


    {
        // Construct HTML
        $css = [];

        // Create CSS

<         $value = $pStyle->getFillType() == Fill::FILL_NONE ?
<             'white' : '#' . $pStyle->getStartColor()->getRGB();



>         if ($fill->getFillType() !== Fill::FILL_NONE) {
>             $value = $fill->getFillType() == Fill::FILL_NONE ?
>                 'white' : '#' . $fill->getStartColor()->getRGB();


        $css['background-color'] = $value;

>         }



        return $css;
    }

    /**
     * Generate HTML footer.
     */

<     public function generateHTMLFooter()



>     public function generateHTMLFooter(): string


    {
        // Construct HTML
        $html = '';
        $html .= '  </body>' . PHP_EOL;
        $html .= '</html>' . PHP_EOL;

        return $html;
    }


<     private function generateTableTagInline($pSheet, $id)



>     private function generateTableTagInline(Worksheet $worksheet, string $id): string


    {
        $style = isset($this->cssStyles['table']) ?
            $this->assembleCSS($this->cssStyles['table']) : '';


<         $prntgrid = $pSheet->getPrintGridlines();
<         $viewgrid = $this->isPdf ? $prntgrid : $pSheet->getShowGridlines();



>         $prntgrid = $worksheet->getPrintGridlines();
>         $viewgrid = $this->isPdf ? $prntgrid : $worksheet->getShowGridlines();


        if ($viewgrid && $prntgrid) {
            $html = "    <table border='1' cellpadding='1' $id cellspacing='1' style='$style' class='gridlines gridlinesp'>" . PHP_EOL;
        } elseif ($viewgrid) {
            $html = "    <table border='0' cellpadding='0' $id cellspacing='0' style='$style' class='gridlines'>" . PHP_EOL;
        } elseif ($prntgrid) {
            $html = "    <table border='0' cellpadding='0' $id cellspacing='0' style='$style' class='gridlinesp'>" . PHP_EOL;
        } else {
            $html = "    <table border='0' cellpadding='1' $id cellspacing='0' style='$style'>" . PHP_EOL;
        }

        return $html;
    }


<     private function generateTableTag($pSheet, $id, &$html, $sheetIndex): void



>     private function generateTableTag(Worksheet $worksheet, string $id, string &$html, int $sheetIndex): void


    {
        if (!$this->useInlineCss) {

<             $gridlines = $pSheet->getShowGridlines() ? ' gridlines' : '';
<             $gridlinesp = $pSheet->getPrintGridlines() ? ' gridlinesp' : '';



>             $gridlines = $worksheet->getShowGridlines() ? ' gridlines' : '';
>             $gridlinesp = $worksheet->getPrintGridlines() ? ' gridlinesp' : '';


            $html .= "    <table border='0' cellpadding='0' cellspacing='0' $id class='sheet$sheetIndex$gridlines$gridlinesp'>" . PHP_EOL;
        } else {

<             $html .= $this->generateTableTagInline($pSheet, $id);



>             $html .= $this->generateTableTagInline($worksheet, $id);


        }
    }

    /**
     * Generate table header.
     *

<      * @param Worksheet $pSheet The worksheet for the table we are writing



>      * @param Worksheet $worksheet The worksheet for the table we are writing


     * @param bool $showid whether or not to add id to table tag
     *
     * @return string
     */

<     private function generateTableHeader($pSheet, $showid = true)



>     private function generateTableHeader(Worksheet $worksheet, $showid = true)


    {

<         $sheetIndex = $pSheet->getParent()->getIndex($pSheet);



>         $sheetIndex = $worksheet->getParent()->getIndex($worksheet);



        // Construct HTML
        $html = '';
        $id = $showid ? "id='sheet$sheetIndex'" : '';
        if ($showid) {

<             $html .= "<div style='page: page$sheetIndex'>\n";



>             $html .= "<div style='page: page$sheetIndex'>" . PHP_EOL;


        } else {

<             $html .= "<div style='page: page$sheetIndex' class='scrpgbrk'>\n";



>             $html .= "<div style='page: page$sheetIndex' class='scrpgbrk'>" . PHP_EOL;


        }


<         $this->generateTableTag($pSheet, $id, $html, $sheetIndex);



>         $this->generateTableTag($worksheet, $id, $html, $sheetIndex);



        // Write <col> elements

<         $highestColumnIndex = Coordinate::columnIndexFromString($pSheet->getHighestColumn()) - 1;



>         $highestColumnIndex = Coordinate::columnIndexFromString($worksheet->getHighestColumn()) - 1;


        $i = -1;
        while ($i++ < $highestColumnIndex) {
            if (!$this->useInlineCss) {
                $html .= '        <col class="col' . $i . '" />' . PHP_EOL;
            } else {
                $style = isset($this->cssStyles['table.sheet' . $sheetIndex . ' col.col' . $i]) ?
                    $this->assembleCSS($this->cssStyles['table.sheet' . $sheetIndex . ' col.col' . $i]) : '';
                $html .= '        <col style="' . $style . '" />' . PHP_EOL;
            }
        }

        return $html;
    }

    /**
     * Generate table footer.
     */

<     private function generateTableFooter()



>     private function generateTableFooter(): string


    {
        return '    </tbody></table>' . PHP_EOL . '</div>' . PHP_EOL;
    }

    /**
     * Generate row start.
     *

<      * @param Worksheet $pSheet \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet


     * @param int $sheetIndex Sheet index (0-based)

<      * @param int $pRow row number



>      * @param int $row row number


     *
     * @return string
     */

<     private function generateRowStart(Worksheet $pSheet, $sheetIndex, $pRow)



>     private function generateRowStart(Worksheet $worksheet, $sheetIndex, $row)


    {
        $html = '';

<         if (count($pSheet->getBreaks()) > 0) {
<             $breaks = $pSheet->getBreaks();



>         if (count($worksheet->getBreaks()) > 0) {
>             $breaks = $worksheet->getBreaks();



            // check if a break is needed before this row

<             if (isset($breaks['A' . $pRow])) {



>             if (isset($breaks['A' . $row])) {


                // close table: </table>
                $html .= $this->generateTableFooter();
                if ($this->isPdf && $this->useInlineCss) {
                    $html .= '<div style="page-break-before:always" />';
                }

                // open table again: <table> + <col> etc.

<                 $html .= $this->generateTableHeader($pSheet, false);



>                 $html .= $this->generateTableHeader($worksheet, false);


                $html .= '<tbody>' . PHP_EOL;
            }
        }

        // Write row start
        if (!$this->useInlineCss) {

<             $html .= '          <tr class="row' . $pRow . '">' . PHP_EOL;



>             $html .= '          <tr class="row' . $row . '">' . PHP_EOL;


        } else {

<             $style = isset($this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $pRow])
<                 ? $this->assembleCSS($this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $pRow]) : '';



>             $style = isset($this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $row])
>                 ? $this->assembleCSS($this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $row]) : '';



            $html .= '          <tr style="' . $style . '">' . PHP_EOL;
        }

        return $html;
    }


<     private function generateRowCellCss($pSheet, $cellAddress, $pRow, $colNum)



>     private function generateRowCellCss(Worksheet $worksheet, string $cellAddress, int $row, int $columnNumber): array


    {

<         $cell = ($cellAddress > '') ? $pSheet->getCell($cellAddress) : '';
<         $coordinate = Coordinate::stringFromColumnIndex($colNum + 1) . ($pRow + 1);



>         $cell = ($cellAddress > '') ? $worksheet->getCellCollection()->get($cellAddress) : '';
>         $coordinate = Coordinate::stringFromColumnIndex($columnNumber + 1) . ($row + 1);


        if (!$this->useInlineCss) {

<             $cssClass = 'column' . $colNum;



>             $cssClass = 'column' . $columnNumber;


        } else {
            $cssClass = [];
            // The statements below do nothing.
            // Commenting out the code rather than deleting it
            // in case someone can figure out what their intent was.
            //if ($cellType == 'th') {
            //    if (isset($this->cssStyles['table.sheet' . $sheetIndex . ' th.column' . $colNum])) {
            //        $this->cssStyles['table.sheet' . $sheetIndex . ' th.column' . $colNum];
            //    }
            //} else {
            //    if (isset($this->cssStyles['table.sheet' . $sheetIndex . ' td.column' . $colNum])) {
            //        $this->cssStyles['table.sheet' . $sheetIndex . ' td.column' . $colNum];
            //    }
            //}
            // End of mystery statements.
        }

        return [$cell, $cssClass, $coordinate];
    }


<     private function generateRowCellDataValueRich($cell, &$cellData): void



>     private function generateRowCellDataValueRich(Cell $cell, string &$cellData): void


    {
        // Loop through rich text elements
        $elements = $cell->getValue()->getRichTextElements();
        foreach ($elements as $element) {
            // Rich text start?
            if ($element instanceof Run) {

>                 $cellEnd = '';
                $cellData .= '<span style="' . $this->assembleCSS($this->createCSSStyleFont($element->getFont())) . '">';
>                 if ($element->getFont() !== null) {




<                 $cellEnd = '';


                if ($element->getFont()->getSuperscript()) {
                    $cellData .= '<sup>';
                    $cellEnd = '</sup>';
                } elseif ($element->getFont()->getSubscript()) {
                    $cellData .= '<sub>';
                    $cellEnd = '</sub>';
                }

>                 }



                // Convert UTF8 data to PCDATA
                $cellText = $element->getText();

<                 $cellData .= htmlspecialchars($cellText);



>                 $cellData .= htmlspecialchars($cellText, Settings::htmlEntityFlags());



                $cellData .= $cellEnd;

                $cellData .= '</span>';
            } else {
                // Convert UTF8 data to PCDATA
                $cellText = $element->getText();

<                 $cellData .= htmlspecialchars($cellText);



>                 $cellData .= htmlspecialchars($cellText, Settings::htmlEntityFlags());


            }
        }
    }


<     private function generateRowCellDataValue($pSheet, $cell, &$cellData): void



>     private function generateRowCellDataValue(Worksheet $worksheet, Cell $cell, string &$cellData): void


    {
        if ($cell->getValue() instanceof RichText) {
            $this->generateRowCellDataValueRich($cell, $cellData);
        } else {
            $origData = $this->preCalculateFormulas ? $cell->getCalculatedValue() : $cell->getValue();

>             $formatCode = $worksheet->getParent()->getCellXfByIndex($cell->getXfIndex())->getNumberFormat()->getFormatCode();
            $cellData = NumberFormat::toFormattedString(
> 



<                 $origData,
<                 $pSheet->getParent()->getCellXfByIndex($cell->getXfIndex())->getNumberFormat()->getFormatCode(),



>                 $origData ?? '',
>                 $formatCode ?? NumberFormat::FORMAT_GENERAL,


                [$this, 'formatColor']
            );

> 


            if ($cellData === $origData) {

<                 $cellData = htmlspecialchars($cellData);



>                 $cellData = htmlspecialchars($cellData, Settings::htmlEntityFlags());


            }

<             if ($pSheet->getParent()->getCellXfByIndex($cell->getXfIndex())->getFont()->getSuperscript()) {



>             if ($worksheet->getParent()->getCellXfByIndex($cell->getXfIndex())->getFont()->getSuperscript()) {


                $cellData = '<sup>' . $cellData . '</sup>';

<             } elseif ($pSheet->getParent()->getCellXfByIndex($cell->getXfIndex())->getFont()->getSubscript()) {



>             } elseif ($worksheet->getParent()->getCellXfByIndex($cell->getXfIndex())->getFont()->getSubscript()) {


                $cellData = '<sub>' . $cellData . '</sub>';
            }
        }
    }


<     private function generateRowCellData($pSheet, $cell, &$cssClass, $cellType)



>     /**
>      * @param null|Cell|string $cell
>      * @param array|string $cssClass
>      */
>     private function generateRowCellData(Worksheet $worksheet, $cell, &$cssClass, string $cellType): string


    {
        $cellData = '&nbsp;';
        if ($cell instanceof Cell) {
            $cellData = '';
            // Don't know what this does, and no test cases.
            //if ($cell->getParent() === null) {

<             //    $cell->attach($pSheet);



>             //    $cell->attach($worksheet);


            //}
            // Value

<             $this->generateRowCellDataValue($pSheet, $cell, $cellData);



>             $this->generateRowCellDataValue($worksheet, $cell, $cellData);



            // Converts the cell content so that spaces occuring at beginning of each new line are replaced by &nbsp;
            // Example: "  Hello\n to the world" is converted to "&nbsp;&nbsp;Hello\n&nbsp;to the world"

<             $cellData = preg_replace('/(?m)(?:^|\\G) /', '&nbsp;', $cellData);



>             $cellData = (string) preg_replace('/(?m)(?:^|\\G) /', '&nbsp;', $cellData);



            // convert newline "\n" to '<br>'
            $cellData = nl2br($cellData);

            // Extend CSS class?

<             if (!$this->useInlineCss) {



>             if (!$this->useInlineCss && is_string($cssClass)) {


                $cssClass .= ' style' . $cell->getXfIndex();
                $cssClass .= ' ' . $cell->getDataType();

<             } else {



>             } elseif (is_array($cssClass)) {


                if ($cellType == 'th') {
                    if (isset($this->cssStyles['th.style' . $cell->getXfIndex()])) {
                        $cssClass = array_merge($cssClass, $this->cssStyles['th.style' . $cell->getXfIndex()]);
                    }
                } else {
                    if (isset($this->cssStyles['td.style' . $cell->getXfIndex()])) {
                        $cssClass = array_merge($cssClass, $this->cssStyles['td.style' . $cell->getXfIndex()]);
                    }
                }

                // General horizontal alignment: Actual horizontal alignment depends on dataType

<                 $sharedStyle = $pSheet->getParent()->getCellXfByIndex($cell->getXfIndex());



>                 $sharedStyle = $worksheet->getParent()->getCellXfByIndex($cell->getXfIndex());


                if (
                    $sharedStyle->getAlignment()->getHorizontal() == Alignment::HORIZONTAL_GENERAL
                    && isset($this->cssStyles['.' . $cell->getDataType()]['text-align'])
                ) {
                    $cssClass['text-align'] = $this->cssStyles['.' . $cell->getDataType()]['text-align'];
                }
            }
        } else {
            // Use default borders for empty cell
            if (is_string($cssClass)) {
                $cssClass .= ' style0';
            }
        }

        return $cellData;
    }


<     private function generateRowIncludeCharts($pSheet, $coordinate)



>     private function generateRowIncludeCharts(Worksheet $worksheet, string $coordinate): string


    {

<         return $this->includeCharts ? $this->writeChartInCell($pSheet, $coordinate) : '';



>         return $this->includeCharts ? $this->writeChartInCell($worksheet, $coordinate) : '';


    }


<     private function generateRowSpans($html, $rowSpan, $colSpan)



>     private function generateRowSpans(string $html, int $rowSpan, int $colSpan): string


    {
        $html .= ($colSpan > 1) ? (' colspan="' . $colSpan . '"') : '';
        $html .= ($rowSpan > 1) ? (' rowspan="' . $rowSpan . '"') : '';

        return $html;
    }


<     private function generateRowWriteCell(&$html, $pSheet, $coordinate, $cellType, $cellData, $colSpan, $rowSpan, $cssClass, $colNum, $sheetIndex, $pRow): void



>     /**
>      * @param array|string $cssClass
>      */
>     private function generateRowWriteCell(string &$html, Worksheet $worksheet, string $coordinate, string $cellType, string $cellData, int $colSpan, int $rowSpan, $cssClass, int $colNum, int $sheetIndex, int $row): void


    {
        // Image?

<         $htmlx = $this->writeImageInCell($pSheet, $coordinate);



>         $htmlx = $this->writeImageInCell($worksheet, $coordinate);


        // Chart?

<         $htmlx .= $this->generateRowIncludeCharts($pSheet, $coordinate);



>         $htmlx .= $this->generateRowIncludeCharts($worksheet, $coordinate);


        // Column start
        $html .= '            <' . $cellType;

<         if (!$this->useInlineCss && !$this->isPdf) {



>         if (!$this->useInlineCss && !$this->isPdf && is_string($cssClass)) {


            $html .= ' class="' . $cssClass . '"';
            if ($htmlx) {
                $html .= " style='position: relative;'";
            }
        } else {
            //** Necessary redundant code for the sake of \PhpOffice\PhpSpreadsheet\Writer\Pdf **
            // We must explicitly write the width of the <td> element because TCPDF
            // does not recognize e.g. <col style="width:42pt">
            if ($this->useInlineCss) {

<                 $xcssClass = $cssClass;



>                 $xcssClass = is_array($cssClass) ? $cssClass : [];


            } else {

>                 if (is_string($cssClass)) {


                $html .= ' class="' . $cssClass . '"';

>                 }


                $xcssClass = [];
            }
            $width = 0;
            $i = $colNum - 1;
            $e = $colNum + $colSpan - 1;
            while ($i++ < $e) {
                if (isset($this->columnWidths[$sheetIndex][$i])) {
                    $width += $this->columnWidths[$sheetIndex][$i];
                }
            }

<             $xcssClass['width'] = $width . 'pt';
< 



>             $xcssClass['width'] = (string) $width . 'pt';


            // We must also explicitly write the height of the <td> element because TCPDF
            // does not recognize e.g. <tr style="height:50pt">

<             if (isset($this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $pRow]['height'])) {
<                 $height = $this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $pRow]['height'];



>             if (isset($this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $row]['height'])) {
>                 $height = $this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $row]['height'];


                $xcssClass['height'] = $height;
            }
            //** end of redundant code **

            if ($htmlx) {
                $xcssClass['position'] = 'relative';
            }
            $html .= ' style="' . $this->assembleCSS($xcssClass) . '"';
        }
        $html = $this->generateRowSpans($html, $rowSpan, $colSpan);

        $html .= '>';
        $html .= $htmlx;


<         $html .= $this->writeComment($pSheet, $coordinate);



>         $html .= $this->writeComment($worksheet, $coordinate);



        // Cell data
        $html .= $cellData;

        // Column end
        $html .= '</' . $cellType . '>' . PHP_EOL;
    }

    /**
     * Generate row.
     *

<      * @param Worksheet $pSheet \PhpOffice\PhpSpreadsheet\Worksheet\Worksheet
<      * @param array $pValues Array containing cells in a row
<      * @param int $pRow Row number (0-based)



>      * @param array $values Array containing cells in a row
>      * @param int $row Row number (0-based)


     * @param string $cellType eg: 'td'
     *
     * @return string
     */

<     private function generateRow(Worksheet $pSheet, array $pValues, $pRow, $cellType)



>     private function generateRow(Worksheet $worksheet, array $values, $row, $cellType)


    {
        // Sheet index

<         $sheetIndex = $pSheet->getParent()->getIndex($pSheet);
<         $html = $this->generateRowStart($pSheet, $sheetIndex, $pRow);



>         $sheetIndex = $worksheet->getParent()->getIndex($worksheet);
>         $html = $this->generateRowStart($worksheet, $sheetIndex, $row);
>         $generateDiv = $this->isMPdf && $worksheet->getRowDimension($row + 1)->getVisible() === false;
>         if ($generateDiv) {
>             $html .= '<div style="visibility:hidden; display:none;">' . PHP_EOL;
>         }



        // Write cells
        $colNum = 0;

<         foreach ($pValues as $cellAddress) {
<             [$cell, $cssClass, $coordinate] = $this->generateRowCellCss($pSheet, $cellAddress, $pRow, $colNum);
< 
<             $colSpan = 1;
<             $rowSpan = 1;



>         foreach ($values as $cellAddress) {
>             [$cell, $cssClass, $coordinate] = $this->generateRowCellCss($worksheet, $cellAddress, $row, $colNum);



            // Cell Data

<             $cellData = $this->generateRowCellData($pSheet, $cell, $cssClass, $cellType);



>             $cellData = $this->generateRowCellData($worksheet, $cell, $cssClass, $cellType);



            // Hyperlink?

<             if ($pSheet->hyperlinkExists($coordinate) && !$pSheet->getHyperlink($coordinate)->isInternal()) {
<                 $cellData = '<a href="' . htmlspecialchars($pSheet->getHyperlink($coordinate)->getUrl()) . '" title="' . htmlspecialchars($pSheet->getHyperlink($coordinate)->getTooltip()) . '">' . $cellData . '</a>';



>             if ($worksheet->hyperlinkExists($coordinate) && !$worksheet->getHyperlink($coordinate)->isInternal()) {
>                 $cellData = '<a href="' . htmlspecialchars($worksheet->getHyperlink($coordinate)->getUrl(), Settings::htmlEntityFlags()) . '" title="' . htmlspecialchars($worksheet->getHyperlink($coordinate)->getTooltip(), Settings::htmlEntityFlags()) . '">' . $cellData . '</a>';


            }

            // Should the cell be written or is it swallowed by a rowspan or colspan?

<             $writeCell = !(isset($this->isSpannedCell[$pSheet->getParent()->getIndex($pSheet)][$pRow + 1][$colNum])
<                 && $this->isSpannedCell[$pSheet->getParent()->getIndex($pSheet)][$pRow + 1][$colNum]);



>             $writeCell = !(isset($this->isSpannedCell[$worksheet->getParent()->getIndex($worksheet)][$row + 1][$colNum])
>                 && $this->isSpannedCell[$worksheet->getParent()->getIndex($worksheet)][$row + 1][$colNum]);



            // Colspan and Rowspan

<             $colspan = 1;
<             $rowspan = 1;
<             if (isset($this->isBaseCell[$pSheet->getParent()->getIndex($pSheet)][$pRow + 1][$colNum])) {
<                 $spans = $this->isBaseCell[$pSheet->getParent()->getIndex($pSheet)][$pRow + 1][$colNum];



>             $colSpan = 1;
>             $rowSpan = 1;
>             if (isset($this->isBaseCell[$worksheet->getParent()->getIndex($worksheet)][$row + 1][$colNum])) {
>                 $spans = $this->isBaseCell[$worksheet->getParent()->getIndex($worksheet)][$row + 1][$colNum];


                $rowSpan = $spans['rowspan'];
                $colSpan = $spans['colspan'];

                //    Also apply style from last cell in merge to fix borders -
                //        relies on !important for non-none border declarations in createCSSStyleBorder

<                 $endCellCoord = Coordinate::stringFromColumnIndex($colNum + $colSpan) . ($pRow + $rowSpan);



>                 $endCellCoord = Coordinate::stringFromColumnIndex($colNum + $colSpan) . ($row + $rowSpan);


                if (!$this->useInlineCss) {

<                     $cssClass .= ' style' . $pSheet->getCell($endCellCoord)->getXfIndex();



>                     $cssClass .= ' style' . $worksheet->getCell($endCellCoord)->getXfIndex();


                }
            }

            // Write
            if ($writeCell) {

<                 $this->generateRowWriteCell($html, $pSheet, $coordinate, $cellType, $cellData, $colSpan, $rowSpan, $cssClass, $colNum, $sheetIndex, $pRow);



>                 $this->generateRowWriteCell($html, $worksheet, $coordinate, $cellType, $cellData, $colSpan, $rowSpan, $cssClass, $colNum, $sheetIndex, $row);


            }

            // Next column
            ++$colNum;
        }

        // Write row end

>         if ($generateDiv) {
        $html .= '          </tr>' . PHP_EOL;
>             $html .= '</div>' . PHP_EOL;

>         }


        // Return
        return $html;
    }

    /**
     * Takes array where of CSS properties / values and converts to CSS string.
     *
     * @return string
     */

<     private function assembleCSS(array $pValue = [])



>     private function assembleCSS(array $values = [])


    {
        $pairs = [];

<         foreach ($pValue as $property => $value) {



>         foreach ($values as $property => $value) {


            $pairs[] = $property . ':' . $value;
        }
        $string = implode('; ', $pairs);

        return $string;
    }

    /**
     * Get images root.
     *
     * @return string
     */
    public function getImagesRoot()
    {
        return $this->imagesRoot;
    }

    /**
     * Set images root.
     *

<      * @param string $pValue



>      * @param string $imagesRoot


     *
     * @return $this
     */

<     public function setImagesRoot($pValue)



>     public function setImagesRoot($imagesRoot)


    {

<         $this->imagesRoot = $pValue;



>         $this->imagesRoot = $imagesRoot;



        return $this;
    }

    /**
     * Get embed images.
     *
     * @return bool
     */
    public function getEmbedImages()
    {
        return $this->embedImages;
    }

    /**
     * Set embed images.
     *

<      * @param bool $pValue



>      * @param bool $embedImages


     *
     * @return $this
     */

<     public function setEmbedImages($pValue)



>     public function setEmbedImages($embedImages)


    {

<         $this->embedImages = $pValue;



>         $this->embedImages = $embedImages;



        return $this;
    }

    /**
     * Get use inline CSS?
     *
     * @return bool
     */
    public function getUseInlineCss()
    {
        return $this->useInlineCss;
    }

    /**
     * Set use inline CSS?
     *

<      * @param bool $pValue



>      * @param bool $useInlineCss


     *
     * @return $this
     */

<     public function setUseInlineCss($pValue)



>     public function setUseInlineCss($useInlineCss)


    {

<         $this->useInlineCss = $pValue;



>         $this->useInlineCss = $useInlineCss;



        return $this;
    }

    /**
     * Get use embedded CSS?
     *
     * @return bool
     *
     * @codeCoverageIgnore
     *
     * @deprecated no longer used
     */
    public function getUseEmbeddedCSS()
    {
        return $this->useEmbeddedCSS;
    }

    /**
     * Set use embedded CSS?
     *

<      * @param bool $pValue



>      * @param bool $useEmbeddedCSS


     *
     * @return $this
     *
     * @codeCoverageIgnore
     *
     * @deprecated no longer used
     */

<     public function setUseEmbeddedCSS($pValue)



>     public function setUseEmbeddedCSS($useEmbeddedCSS)


    {

<         $this->useEmbeddedCSS = $pValue;



>         $this->useEmbeddedCSS = $useEmbeddedCSS;



        return $this;
    }

    /**
     * Add color to formatted string as inline style.
     *

<      * @param string $pValue Plain formatted value without color
<      * @param string $pFormat Format code



>      * @param string $value Plain formatted value without color
>      * @param string $format Format code


     *
     * @return string
     */

<     public function formatColor($pValue, $pFormat)



>     public function formatColor($value, $format)


    {
        // Color information, e.g. [Red] is always at the beginning
        $color = null; // initialize
        $matches = [];

        $color_regex = '/^\\[[a-zA-Z]+\\]/';

<         if (preg_match($color_regex, $pFormat, $matches)) {



>         if (preg_match($color_regex, $format, $matches)) {


            $color = str_replace(['[', ']'], '', $matches[0]);
            $color = strtolower($color);
        }

        // convert to PCDATA

<         $value = htmlspecialchars($pValue);



>         $result = htmlspecialchars($value, Settings::htmlEntityFlags());



        // color span tag
        if ($color !== null) {

<             $value = '<span style="color:' . $color . '">' . $value . '</span>';



>             $result = '<span style="color:' . $color . '">' . $result . '</span>';


        }


<         return $value;



>         return $result;


    }

    /**
     * Calculate information about HTML colspan and rowspan which is not always the same as Excel's.
     */
    private function calculateSpans(): void
    {
        if ($this->spansAreCalculated) {
            return;
        }
        // Identify all cells that should be omitted in HTML due to cell merge.
        // In HTML only the upper-left cell should be written and it should have
        //   appropriate rowspan / colspan attribute
        $sheetIndexes = $this->sheetIndex !== null ?
            [$this->sheetIndex] : range(0, $this->spreadsheet->getSheetCount() - 1);

        foreach ($sheetIndexes as $sheetIndex) {
            $sheet = $this->spreadsheet->getSheet($sheetIndex);

            $candidateSpannedRow = [];

            // loop through all Excel merged cells
            foreach ($sheet->getMergeCells() as $cells) {
                [$cells] = Coordinate::splitRange($cells);
                $first = $cells[0];
                $last = $cells[1];


<                 [$fc, $fr] = Coordinate::coordinateFromString($first);
<                 $fc = Coordinate::columnIndexFromString($fc) - 1;



>                 [$fc, $fr] = Coordinate::indexesFromString($first);
>                 $fc = $fc - 1;




<                 [$lc, $lr] = Coordinate::coordinateFromString($last);
<                 $lc = Coordinate::columnIndexFromString($lc) - 1;



>                 [$lc, $lr] = Coordinate::indexesFromString($last);
>                 $lc = $lc - 1;



                // loop through the individual cells in the individual merge
                $r = $fr - 1;
                while ($r++ < $lr) {
                    // also, flag this row as a HTML row that is candidate to be omitted
                    $candidateSpannedRow[$r] = $r;

                    $c = $fc - 1;
                    while ($c++ < $lc) {
                        if (!($c == $fc && $r == $fr)) {
                            // not the upper-left cell (should not be written in HTML)
                            $this->isSpannedCell[$sheetIndex][$r][$c] = [
                                'baseCell' => [$fr, $fc],
                            ];
                        } else {
                            // upper-left is the base cell that should hold the colspan/rowspan attribute
                            $this->isBaseCell[$sheetIndex][$r][$c] = [
                                'xlrowspan' => $lr - $fr + 1, // Excel rowspan
                                'rowspan' => $lr - $fr + 1, // HTML rowspan, value may change
                                'xlcolspan' => $lc - $fc + 1, // Excel colspan
                                'colspan' => $lc - $fc + 1, // HTML colspan, value may change
                            ];
                        }
                    }
                }
            }

            $this->calculateSpansOmitRows($sheet, $sheetIndex, $candidateSpannedRow);

            // TODO: Same for columns
        }

        // We have calculated the spans
        $this->spansAreCalculated = true;
    }


<     private function calculateSpansOmitRows($sheet, $sheetIndex, $candidateSpannedRow): void



>     private function calculateSpansOmitRows(Worksheet $sheet, int $sheetIndex, array $candidateSpannedRow): void


    {
        // Identify which rows should be omitted in HTML. These are the rows where all the cells
        //   participate in a merge and the where base cells are somewhere above.
        $countColumns = Coordinate::columnIndexFromString($sheet->getHighestColumn());
        foreach ($candidateSpannedRow as $rowIndex) {
            if (isset($this->isSpannedCell[$sheetIndex][$rowIndex])) {
                if (count($this->isSpannedCell[$sheetIndex][$rowIndex]) == $countColumns) {
                    $this->isSpannedRow[$sheetIndex][$rowIndex] = $rowIndex;
                }
            }
        }

        // For each of the omitted rows we found above, the affected rowspans should be subtracted by 1
        if (isset($this->isSpannedRow[$sheetIndex])) {
            foreach ($this->isSpannedRow[$sheetIndex] as $rowIndex) {
                $adjustedBaseCells = [];
                $c = -1;
                $e = $countColumns - 1;
                while ($c++ < $e) {
                    $baseCell = $this->isSpannedCell[$sheetIndex][$rowIndex][$c]['baseCell'];


<                     if (!in_array($baseCell, $adjustedBaseCells)) {



>                     if (!in_array($baseCell, $adjustedBaseCells, true)) {


                        // subtract rowspan by 1
                        --$this->isBaseCell[$sheetIndex][$baseCell[0]][$baseCell[1]]['rowspan'];
                        $adjustedBaseCells[] = $baseCell;
                    }
                }
            }
        }
    }

    /**
     * Write a comment in the same format as LibreOffice.
     *
     * @see https://github.com/LibreOffice/core/blob/9fc9bf3240f8c62ad7859947ab8a033ac1fe93fa/sc/source/filter/html/htmlexp.cxx#L1073-L1092
     *
     * @param string $coordinate
     *
     * @return string
     */

<     private function writeComment(Worksheet $pSheet, $coordinate)



>     private function writeComment(Worksheet $worksheet, $coordinate)


    {
        $result = '';

<         if (!$this->isPdf && isset($pSheet->getComments()[$coordinate])) {



>         if (!$this->isPdf && isset($worksheet->getComments()[$coordinate])) {


            $sanitizer = new HTMLPurifier();

<             $sanitizedString = $sanitizer->purify($pSheet->getComment($coordinate)->getText()->getPlainText());



>             $cachePath = File::sysGetTempDir() . '/phpsppur';
>             if (is_dir($cachePath) || mkdir($cachePath)) {
>                 $sanitizer->config->set('Cache.SerializerPath', $cachePath);
>             }
>             $sanitizedString = $sanitizer->purify($worksheet->getComment($coordinate)->getText()->getPlainText());


            if ($sanitizedString !== '') {
                $result .= '<a class="comment-indicator"></a>';
                $result .= '<div class="comment">' . nl2br($sanitizedString) . '</div>';
                $result .= PHP_EOL;
            }
        }

        return $result;
    }


>     public function getOrientation(): ?string
    /**
>     {
     * Generate @page declarations.
>         // Expect Pdf classes to override this method.
     *
>         return $this->isPdf ? PageSetup::ORIENTATION_PORTRAIT : null;
     * @param bool $generateSurroundingHTML
>     }
     *
> 


     * @return    string
     */
    private function generatePageDeclarations($generateSurroundingHTML)
    {
        // Ensure that Spans have been calculated?
        $this->calculateSpans();

        // Fetch sheets
        $sheets = [];
        if ($this->sheetIndex === null) {
            $sheets = $this->spreadsheet->getAllSheets();
        } else {
            $sheets[] = $this->spreadsheet->getSheet($this->sheetIndex);
        }

        // Construct HTML
        $htmlPage = $generateSurroundingHTML ? ('<style type="text/css">' . PHP_EOL) : '';

        // Loop all sheets
        $sheetId = 0;

<         foreach ($sheets as $pSheet) {



>         foreach ($sheets as $worksheet) {


            $htmlPage .= "@page page$sheetId { ";

<             $left = StringHelper::formatNumber($pSheet->getPageMargins()->getLeft()) . 'in; ';



>             $left = StringHelper::formatNumber($worksheet->getPageMargins()->getLeft()) . 'in; ';


            $htmlPage .= 'margin-left: ' . $left;

<             $right = StringHelper::FormatNumber($pSheet->getPageMargins()->getRight()) . 'in; ';



>             $right = StringHelper::FormatNumber($worksheet->getPageMargins()->getRight()) . 'in; ';


            $htmlPage .= 'margin-right: ' . $right;

<             $top = StringHelper::FormatNumber($pSheet->getPageMargins()->getTop()) . 'in; ';



>             $top = StringHelper::FormatNumber($worksheet->getPageMargins()->getTop()) . 'in; ';


            $htmlPage .= 'margin-top: ' . $top;

<             $bottom = StringHelper::FormatNumber($pSheet->getPageMargins()->getBottom()) . 'in; ';



>             $bottom = StringHelper::FormatNumber($worksheet->getPageMargins()->getBottom()) . 'in; ';


            $htmlPage .= 'margin-bottom: ' . $bottom;

<             $orientation = $pSheet->getPageSetup()->getOrientation();
<             if ($orientation === \PhpOffice\PhpSpreadsheet\Worksheet\PageSetup::ORIENTATION_LANDSCAPE) {



>             $orientation = $this->getOrientation() ?? $worksheet->getPageSetup()->getOrientation();
>             if ($orientation === PageSetup::ORIENTATION_LANDSCAPE) {


                $htmlPage .= 'size: landscape; ';

<             } elseif ($orientation === \PhpOffice\PhpSpreadsheet\Worksheet\PageSetup::ORIENTATION_PORTRAIT) {



>             } elseif ($orientation === PageSetup::ORIENTATION_PORTRAIT) {


                $htmlPage .= 'size: portrait; ';
            }

<             $htmlPage .= "}\n";



>             $htmlPage .= '}' . PHP_EOL;


            ++$sheetId;
        }

<         $htmlPage .= <<<EOF
< .navigation {page-break-after: always;}
< .scrpgbrk, div + div {page-break-before: always;}
< @media screen {
<   .gridlines td {border: 1px solid black;}
<   .gridlines th {border: 1px solid black;}
<   body>div {margin-top: 5px;}
<   body>div:first-child {margin-top: 0;}
<   .scrpgbrk {margin-top: 1px;}
< }
< @media print {
<   .gridlinesp td {border: 1px solid black;}
<   .gridlinesp th {border: 1px solid black;}
<   .navigation {display: none;}
< }
< 
< EOF;



>         $htmlPage .= implode(PHP_EOL, [
>             '.navigation {page-break-after: always;}',
>             '.scrpgbrk, div + div {page-break-before: always;}',
>             '@media screen {',
>             '  .gridlines td {border: 1px solid black;}',
>             '  .gridlines th {border: 1px solid black;}',
>             '  body>div {margin-top: 5px;}',
>             '  body>div:first-child {margin-top: 0;}',
>             '  .scrpgbrk {margin-top: 1px;}',
>             '}',
>             '@media print {',
>             '  .gridlinesp td {border: 1px solid black;}',
>             '  .gridlinesp th {border: 1px solid black;}',
>             '  .navigation {display: none;}',
>             '}',
>             '',
>         ]);


        $htmlPage .= $generateSurroundingHTML ? ('</style>' . PHP_EOL) : '';

        return $htmlPage;
    }
}