Html::generateRowCellCss() - Code Metrics - Inspection of "feat: Allow sheet index ranges" - PHPOffice/PhpSpreadsheet - Measure and Improve Code Quality continuously with Scrutinizer

Passed
Pull Request — master (#4204)

unknown
created 2024-10-27 23:02 UTC
Html::generateRowCellCss() A

↳ Parent: Html
Complexity

Conditions	3
Paths	4
Size

Total Lines	24
Code Lines	7
Duplication

Lines	0
Ratio	0 %
Code Coverage

Tests	6
CRAP Score	3
Importance

Changes
Metric	Value
cc	3
eloc	7
nc	4
nop	4
dl	0
loc	24
ccs	6
cts	6
cp	1
crap	3
rs	10
c	0
b	0
f	0
<?php

namespace PhpOffice\PhpSpreadsheet\Writer;

use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
use PhpOffice\PhpSpreadsheet\Cell\Cell;
use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use PhpOffice\PhpSpreadsheet\Chart\Chart;
use PhpOffice\PhpSpreadsheet\Comment;
use PhpOffice\PhpSpreadsheet\Document\Properties;
use PhpOffice\PhpSpreadsheet\RichText\RichText;
use PhpOffice\PhpSpreadsheet\RichText\Run;
use PhpOffice\PhpSpreadsheet\Settings;
use PhpOffice\PhpSpreadsheet\Shared\Date;
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\BaseDrawing;
use PhpOffice\PhpSpreadsheet\Worksheet\Drawing;
use PhpOffice\PhpSpreadsheet\Worksheet\MemoryDrawing;
use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
use PhpOffice\PhpSpreadsheet\Writer\BaseWriter;

class Html extends BaseWriter
{
  private const DEFAULT_CELL_WIDTH_POINTS = 42;

  private const DEFAULT_CELL_WIDTH_PIXELS = 56;

  /**
   * Migration aid to tell if html tags will be treated as plaintext in comments.
   *     if (
   *         defined(
   *             \PhpOffice\PhpSpreadsheet\Writer\Html::class
   *             . '::COMMENT_HTML_TAGS_PLAINTEXT'
   *         )
   *     ) {
   *         new logic with styling in TextRun elements
   *     } else {
   *         old logic with styling via Html tags
   *     }.
   */
  public const COMMENT_HTML_TAGS_PLAINTEXT = true;

  /**
   * Spreadsheet object.
   */
  protected Spreadsheet $spreadsheet;

  /**
   * Sheet index to write.
   */
  private null| int | array $sheetIndex = 0;

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

  /**
   * embed images, or link to images.
   */
  protected bool $embedImages = false;

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

  /**
   * Array of CSS styles.
   */
  private ?array $cssStyles = null;

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

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

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

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

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

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

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

  /**
   * Is the current writer creating mPDF?
   *
   * @deprecated 2.0.1 use instanceof Mpdf instead
   */
  protected bool $isMPdf = false;

  /**
   * Generate the Navigation block.
   */
  private bool $generateSheetNavigationBlock = true;

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

  /** @var BaseDrawing[] */
  private $sheetDrawings;

  /** @var Chart[] */
  private $sheetCharts;

  /**
   * 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 $filename
   */
  public function save($filename, int $flags = 0): void
  {
    $this->processFlags($flags);

    // Open file
    $this->openFileHandle($filename);

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

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

  /**
   * Save Spreadsheet as html to variable.
   */
  public function generateHtmlAll(): string
  {
    $sheets = $this->generateSheetPrep();
    foreach ($sheets as $sheet) {
      $sheet->calculateArrays($this->preCalculateFormulas);
    }
    // garbage collect
    $this->spreadsheet->garbageCollect();

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

    // 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::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;
  }

  /**
   * Map VAlign.
   *
   * @param string $vAlign Vertical alignment
   */
  private function mapVAlign(string $vAlign): string
  {
    return Alignment::VERTICAL_ALIGNMENT_FOR_HTML[$vAlign] ?? '';
  }

  /**
   * Map HAlign.
   *
   * @param string $hAlign Horizontal alignment
   */
  private function mapHAlign(string $hAlign): string
  {
    return Alignment::HORIZONTAL_ALIGNMENT_FOR_HTML[$hAlign] ?? '';
  }

  const BORDER_NONE = 'none';
  const BORDER_ARR = [
    Border::BORDER_NONE => self::BORDER_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|string $borderStyle Sheet index
   */
  private function mapBorderStyle($borderStyle): string
  {
    return self::BORDER_ARR[$borderStyle] ?? '1px solid';
  }

  /**
   * Get sheet index.
   */
  public function getSheetIndex(): null | int | array
  {
    return $this->sheetIndex;
  }

  /**
   * Set sheet index.
   *
   * @param int $sheetIndex Sheet index
   *
   * @return $this
   */
  public function setSheetIndex(int | array $sheetIndex): static
  {
    $this->sheetIndex = $sheetIndex;

    return $this;
  }

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

  /**
   * Set sheet index.
   *
   * @param bool $generateSheetNavigationBlock Flag indicating whether the sheet navigation block should be generated or not
   *
   * @return $this
   */
  public function setGenerateSheetNavigationBlock(bool $generateSheetNavigationBlock): static
  {
    $this->generateSheetNavigationBlock = (bool) $generateSheetNavigationBlock;

    return $this;
  }

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

    return $this;
  }

  private static function generateMeta(?string $val, string $desc): string
  {
    return ($val || $val === '0')
      ? ('      <meta name="' . $desc . '" content="' . htmlspecialchars($val, Settings::htmlEntityFlags()) . '" />' . PHP_EOL)
      : '';
  }

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

  private const CUSTOM_TO_META = [
    Properties::PROPERTY_TYPE_BOOLEAN => 'bool',
    Properties::PROPERTY_TYPE_DATE => 'date',
    Properties::PROPERTY_TYPE_FLOAT => 'float',
    Properties::PROPERTY_TYPE_INTEGER => 'int',
    Properties::PROPERTY_TYPE_STRING => 'string',
  ];

  /**
   * Generate HTML header.
   *
   * @param bool $includeStyles Include styles?
   */
  public function generateHTMLHeader(bool $includeStyles = false): string
  {
    // 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;
    $title = $properties->getTitle();
    if ($title === '') {
      $title = $this->spreadsheet->getActiveSheet()->getTitle();
    }
    $html .= '      <title>' . htmlspecialchars($title, 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');
    $html .= self::generateMeta($properties->getLastModifiedBy(), 'lastModifiedBy');
    $html .= self::generateMeta($properties->getViewport(), 'viewport');
    $date = Date::dateTimeFromTimestamp((string) $properties->getCreated());
    $date->setTimeZone(Date::getDefaultOrLocalTimeZone());
    $html .= self::generateMeta($date->format(DATE_W3C), 'created');
    $date = Date::dateTimeFromTimestamp((string) $properties->getModified());
    $date->setTimeZone(Date::getDefaultOrLocalTimeZone());
    $html .= self::generateMeta($date->format(DATE_W3C), 'modified');

    $customProperties = $properties->getCustomProperties();
    foreach ($customProperties as $customProperty) {
      $propertyValue = $properties->getCustomPropertyValue($customProperty);
      $propertyType = $properties->getCustomPropertyType($customProperty);
      $propertyQualifier = self::CUSTOM_TO_META[$propertyType] ?? null;
      if ($propertyQualifier !== null) {
        if ($propertyType === Properties::PROPERTY_TYPE_BOOLEAN) {
          $propertyValue = $propertyValue ? '1' : '0';
        } elseif ($propertyType === Properties::PROPERTY_TYPE_DATE) {
          $date = Date::dateTimeFromTimestamp((string) $propertyValue);
          $date->setTimeZone(Date::getDefaultOrLocalTimeZone());
          $propertyValue = $date->format(DATE_W3C);
        } else {
          $propertyValue = (string) $propertyValue;
        }
        $html .= self::generateMeta($propertyValue, "custom.$propertyQualifier.$customProperty");
      }
    }

    if (!empty($properties->getHyperlinkBase())) {
      $html .= '      <base href="' . $properties->getHyperlinkBase() . '" />' . PHP_EOL;
    }

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

    $html .= '  </head>' . PHP_EOL;
    $html .= '' . PHP_EOL;
    $html .= self::BODY_LINE;

    return $html;
  }

  /** @return Worksheet[] */
  private function generateSheetPrep(): array
  {
    // Fetch sheets
    if (is_array($this->sheetIndex)) {
      $sheets = [];
      foreach ($this->sheetIndex as $sheetIndex) {
        $sheets[] = $this->spreadsheet->getSheet($sheetIndex);
      }
    } elseif ($this->sheetIndex === null) {
      $sheets = $this->spreadsheet->getAllSheets();
    } else {
      $sheets = [$this->spreadsheet->getSheet($this->sheetIndex)];
    }

    return $sheets;
  }

  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(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.
   */
  public function generateSheetData(): string
  {
    // Ensure that Spans have been calculated?
    $this->calculateSpans();
    $sheets = $this->generateSheetPrep();

    // Construct HTML
    $html = '';

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

      // Get worksheet dimension
      [$min, $max] = explode(':', $sheet->calculateWorksheetDataDimension());
      [$minCol, $minRow, $minColString] = Coordinate::indexesFromString($min);
      [$maxCol, $maxRow] = Coordinate::indexesFromString($max);
      $this->extendRowsAndColumns($sheet, $maxCol, $maxRow);

      [$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 ($this->shouldGenerateRow($sheet, $row) && !isset($this->isSpannedRow[$sheet->getParentOrThrow()->getIndex($sheet)][$row])) {
          // Start a new rowData
          $rowData = [];
          // Loop through columns
          $column = $minCol;
          $colStr = $minColString;
          while ($column <= $maxCol) {
            // Cell exists?
            $cellAddress = Coordinate::stringFromColumnIndex($column) . $row;
            if ($this->shouldGenerateColumn($sheet, $colStr)) {
              $rowData[$column] = ($sheet->getCellCollection()->has($cellAddress)) ? $cellAddress : '';
            }
            ++$column;
            ++$colStr;
          }
          $html .= $this->generateRow($sheet, $rowData, $row - 1, $cellType);
        }

        $html .= $endTag;
      }

      // 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.
   */
  public function generateNavigation(): string
  {
    // 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;
  }

  private function extendRowsAndColumns(Worksheet $worksheet, int &$colMax, int &$rowMax): void
  {
    if ($this->includeCharts) {
      foreach ($worksheet->getChartCollection() as $chart) {
        if ($chart instanceof Chart) {
          $chartCoordinates = $chart->getTopLeftPosition();
          $this->sheetCharts[$chartCoordinates['cell']] = $chart;
          $chartTL = Coordinate::indexesFromString($chartCoordinates['cell']);
          if ($chartTL[1] > $rowMax) {
            $rowMax = $chartTL[1];
          }
          if ($chartTL[0] > $colMax) {
            $colMax = $chartTL[0];
          }
        }
      }
    }
    foreach ($worksheet->getDrawingCollection() as $drawing) {
      if ($drawing instanceof Drawing && $drawing->getPath() === '') {
        continue;
      }
      $imageTL = Coordinate::indexesFromString($drawing->getCoordinates());
      $this->sheetDrawings[$drawing->getCoordinates()] = $drawing;
      if ($imageTL[1] > $rowMax) {
        $rowMax = $imageTL[1];
      }
      if ($imageTL[0] > $colMax) {
        $colMax = $imageTL[0];
      }
    }
  }

  /**
   * Convert Windows file name to file protocol URL.
   *
   * @param string $filename file name on local system
   */
  public static function winFileToUrl(string $filename, bool $mpdf = false): string
  {
    // Windows filename
    if (substr($filename, 1, 2) === ':\\') {
      $protocol = $mpdf ? '' : 'file:///';
      $filename = $protocol . str_replace('\\', '/', $filename);
    }

    return $filename;
  }

  /**
   * Generate image tag in cell.
   *
   * @param string $coordinates Cell coordinates
   */
  private function writeImageInCell(string $coordinates): string
  {
    // Construct HTML
    $html = '';

    // Write images
    $drawing = $this->sheetDrawings[$coordinates] ?? null;
    if ($drawing !== null) {
      $filedesc = $drawing->getDescription();
      $filedesc = $filedesc ? htmlspecialchars($filedesc, ENT_QUOTES) : 'Embedded image';
      if ($drawing instanceof Drawing && $drawing->getPath() !== '') {
        $filename = $drawing->getPath();

        // Strip off eventual '.'
        $filename = (string) preg_replace('/^[.]/', '', $filename);

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

        // Strip off eventual '.' if followed by non-/
        $filename = (string) preg_replace('@^[.]([^/])@', '$1', $filename);

        // Convert UTF8 data to PCDATA
        $filename = htmlspecialchars($filename, Settings::htmlEntityFlags());

        $html .= PHP_EOL;
        $imageData = self::winFileToUrl($filename, $this instanceof Pdf\Mpdf);

        if ($this->embedImages || str_starts_with($imageData, 'zip://')) {
          $imageData = 'data:,';
          $picture = @file_get_contents($filename);
          if ($picture !== false) {
            $mimeContentType = (string) @mime_content_type($filename);
            if (str_starts_with($mimeContentType, 'image/')) {
              // base64 encode the binary data
              $base64 = base64_encode($picture);
              $imageData = 'data:' . $mimeContentType . ';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 = $drawing->getImageResource();
        if ($imageResource) {
          ob_start(); //  Let's start output buffering.
          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.

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

          //  Because of the nature of tables, width is more important than height.
          //  max-width: 100% ensures that image doesnt overflow containing cell
          //    However, PR #3535 broke test
          //    25_In_memory_image, apparently because
          //    of the use of max-with. In addition,
          //    non-memory-drawings don't use max-width.
          //    Its use here is suspect and is being eliminated.
          //  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="width:' . $drawing->getWidth() . 'px;left: '
            . $drawing->getOffsetX() . 'px; top: ' . $drawing->getOffsetY() . 'px;position: absolute; z-index: 1;" />';
        }
      }
    }

    return $html;
  }

  /**
   * Generate chart tag in cell.
   * This code should be exercised by sample:
   * Chart/32_Chart_read_write_PDF.php.
   */
  private function writeChartInCell(Worksheet $worksheet, string $coordinates): string
  {
    // Construct HTML
    $html = '';

    // Write charts
    $chart = $this->sheetCharts[$coordinates] ?? null;
    if ($chart !== null) {
      $chartCoordinates = $chart->getTopLeftPosition();
      $chartFileName = File::sysGetTempDir() . '/' . uniqid('', true) . '.png';
      $renderedWidth = $chart->getRenderedWidth();
      $renderedHeight = $chart->getRenderedHeight();
      if ($renderedWidth === null || $renderedHeight === null) {
        $this->adjustRendererPositions($chart, $worksheet);
      }
      $title = $chart->getTitle();
      $caption = null;
      $filedesc = '';
      if ($title !== null) {
        $calculatedTitle = $title->getCalculatedTitle($worksheet->getParent());
        if ($calculatedTitle !== null) {
          $caption = $title->getCaption();
          $title->setCaption($calculatedTitle);
        }
        $filedesc = $title->getCaptionText($worksheet->getParent());
      }
      $renderSuccessful = $chart->render($chartFileName);
      $chart->setRenderedWidth($renderedWidth);
      $chart->setRenderedHeight($renderedHeight);
      if (isset($title, $caption)) {
        $title->setCaption($caption);
      }
      if (!$renderSuccessful) {
        return '';
      }

      $html .= PHP_EOL;
      $imageDetails = getimagesize($chartFileName) ?: ['', '', 'mime' => ''];

      $filedesc = $filedesc ? htmlspecialchars($filedesc, ENT_QUOTES) : 'Embedded chart';
      $picture = file_get_contents($chartFileName);
      unlink($chartFileName);
      if ($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;
      }
    }

    // Return
    return $html;
  }

  private function adjustRendererPositions(Chart $chart, Worksheet $sheet): void
  {
    $topLeft = $chart->getTopLeftPosition();
    $bottomRight = $chart->getBottomRightPosition();
    $tlCell = $topLeft['cell'];
    $brCell = $bottomRight['cell'];
    if ($tlCell !== '' && $brCell !== '') {
      $tlCoordinate = Coordinate::indexesFromString($tlCell);
      $brCoordinate = Coordinate::indexesFromString($brCell);
      $totalHeight = 0.0;
      $totalWidth = 0.0;
      $defaultRowHeight = $sheet->getDefaultRowDimension()->getRowHeight();
      $defaultRowHeight = SharedDrawing::pointsToPixels(($defaultRowHeight >= 0) ? $defaultRowHeight : SharedFont::getDefaultRowHeightByFont($this->defaultFont));
      if ($tlCoordinate[1] <= $brCoordinate[1] && $tlCoordinate[0] <= $brCoordinate[0]) {
        for ($row = $tlCoordinate[1]; $row <= $brCoordinate[1]; ++$row) {
          $height = $sheet->getRowDimension($row)->getRowHeight('pt');
          $totalHeight += ($height >= 0) ? $height : $defaultRowHeight;
        }
        $rightEdge = $brCoordinate[2];
        ++$rightEdge;
        for ($column = $tlCoordinate[2]; $column !== $rightEdge; ++$column) {
          $width = $sheet->getColumnDimension($column)->getWidth();
          $width = ($width < 0) ? self::DEFAULT_CELL_WIDTH_PIXELS : SharedDrawing::cellDimensionToPixels($sheet->getColumnDimension($column)->getWidth(), $this->defaultFont);
          $totalWidth += $width;
        }
        $chart->setRenderedWidth($totalWidth);
        $chart->setRenderedHeight($totalHeight);
      }
    }
  }

  /**
   * Generate CSS styles.
   *
   * @param bool $generateSurroundingHTML Generate surrounding HTML tags? (&lt;style&gt; and &lt;/style&gt;)
   */
  public function generateStyles(bool $generateSurroundingHTML = true): string
  {
    // 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 = $sheet->getParentOrThrow()->getIndex($sheet);
    $setup = $sheet->getPageSetup();
    if ($setup->getFitToPage() && $setup->getFitToHeight() === 1) {
      $css["table.sheet$sheetIndex"]['page-break-inside'] = 'avoid';
      $css["table.sheet$sheetIndex"]['break-inside'] = 'avoid';
    }
    $picture = $sheet->getBackgroundImage();
    if ($picture !== '') {
      $base64 = base64_encode($picture);
      $css["table.sheet$sheetIndex"]['background-image'] = 'url(data:' . $sheet->getBackgroundMime() . ';base64,' . $base64 . ')';
    }

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

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

    // 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' . $column]['display'] = 'none';
        // This would be better but Firefox has an 11-year-old bug.
        // https://bugzilla.mozilla.org/show_bug.cgi?id=819045
        //$css['table.sheet' . $sheetIndex . ' col.col' . $column]['visibility'] = 'collapse';
      }
      if ($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 { })
   */
  public function buildCSS(bool $generateSurroundingHTML = true): array
  {
    // Cached?
    if ($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 . ', th.style' . $index] = $this->createCSSStyle($style);
      //$css['th.style' . $index] = $this->createCSSStyle($style);
    }

    // Fetch sheets
    $sheets = [];
    if (is_array($this->sheetIndex)) {
      foreach ($this->sheetIndex as $sheetIndex) {
        $sheets[] = $this->spreadsheet->getSheet($sheetIndex);
      }
    } elseif ($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.
   */
  private function createCSSStyle(Style $style): array
  {
    // Create CSS
    return array_merge(
      $this->createCSSStyleAlignment($style->getAlignment()),
      $this->createCSSStyleBorders($style->getBorders()),
      $this->createCSSStyleFont($style->getFont()),
      $this->createCSSStyleFill($style->getFill())
    );
  }

  /**
   * Create CSS style.
   */
  private function createCSSStyleAlignment(Alignment $alignment): array
  {
    // Construct CSS
    $css = [];

    // Create CSS
    $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) $alignment->getIndent() * 9) . 'px';
      }
    }
    $rotation = $alignment->getTextRotation();
    if ($rotation !== 0 && $rotation !== Alignment::TEXTROTATION_STACK_PHPSPREADSHEET) {
      if ($this instanceof Pdf\Mpdf) {
        $css['text-rotate'] = "$rotation";
      } else {
        $css['transform'] = "rotate({$rotation}deg)";
      }
    }

    return $css;
  }

  /**
   * Create CSS style.
   */
  private function createCSSStyleFont(Font $font): array
  {
    // Construct CSS
    $css = [];

    // Create CSS
    if ($font->getBold()) {
      $css['font-weight'] = 'bold';
    }
    if ($font->getUnderline() != Font::UNDERLINE_NONE && $font->getStrikethrough()) {
      $css['text-decoration'] = 'underline line-through';
    } elseif ($font->getUnderline() != Font::UNDERLINE_NONE) {
      $css['text-decoration'] = 'underline';
    } elseif ($font->getStrikethrough()) {
      $css['text-decoration'] = 'line-through';
    }
    if ($font->getItalic()) {
      $css['font-style'] = 'italic';
    }

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

    return $css;
  }

  /**
   * Create CSS style.
   *
   * @param Borders $borders Borders
   */
  private function createCSSStyleBorders(Borders $borders): array
  {
    // Construct CSS
    $css = [];

    // Create CSS
    if (!($this instanceof Pdf\Mpdf)) {
      $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());
    } else {
      // Mpdf doesn't process !important, so omit unimportant border none
      if ($borders->getBottom()->getBorderStyle() !== Border::BORDER_NONE) {
        $css['border-bottom'] = $this->createCSSStyleBorder($borders->getBottom());
      }
      if ($borders->getTop()->getBorderStyle() !== Border::BORDER_NONE) {
        $css['border-top'] = $this->createCSSStyleBorder($borders->getTop());
      }
      if ($borders->getLeft()->getBorderStyle() !== Border::BORDER_NONE) {
        $css['border-left'] = $this->createCSSStyleBorder($borders->getLeft());
      }
      if ($borders->getRight()->getBorderStyle() !== Border::BORDER_NONE) {
        $css['border-right'] = $this->createCSSStyleBorder($borders->getRight());
      }
    }

    return $css;
  }

  /**
   * Create CSS style.
   *
   * @param Border $border Border
   */
  private function createCSSStyleBorder(Border $border): string
  {
    //    Create CSS - add !important to non-none border styles for merged cells
    $borderStyle = $this->mapBorderStyle($border->getBorderStyle());

    return $borderStyle . ' #' . $border->getColor()->getRGB() . (($borderStyle === self::BORDER_NONE) ? '' : ' !important');
  }

  /**
   * Create CSS style (Fill).
   *
   * @param Fill $fill Fill
   */
  private function createCSSStyleFill(Fill $fill): array
  {
    // Construct HTML
    $css = [];

    // Create CSS
    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(): string
  {
    // Construct HTML
    $html = '';
    $html .= '  </body>' . PHP_EOL;
    $html .= '</html>' . PHP_EOL;

    return $html;
  }

  private function generateTableTagInline(Worksheet $worksheet, string $id): string
  {
    $style = isset($this->cssStyles['table'])
      ? $this->assembleCSS($this->cssStyles['table']) : '';

    $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(Worksheet $worksheet, string $id, string &$html, int $sheetIndex): void
  {
    if (!$this->useInlineCss) {
      $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 .= $this->generateTableTagInline($worksheet, $id);
    }
  }

  /**
   * Generate table header.
   *
   * @param Worksheet $worksheet The worksheet for the table we are writing
   * @param bool $showid whether or not to add id to table tag
   */
  private function generateTableHeader(Worksheet $worksheet, bool $showid = true): string
  {
    $sheetIndex = $worksheet->getParentOrThrow()->getIndex($worksheet);

    // Construct HTML
    $html = '';
    $id = $showid ? "id='sheet$sheetIndex'" : '';
    if ($showid) {
      $html .= "<div style='page: page$sheetIndex'>" . PHP_EOL;
    } else {
      $html .= "<div style='page: page$sheetIndex' class='scrpgbrk'>" . PHP_EOL;
    }

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

    // Write <col> elements
    $highestColumnIndex = Coordinate::columnIndexFromString($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(): string
  {
    return '    </tbody></table>' . PHP_EOL . '</div>' . PHP_EOL;
  }

  /**
   * Generate row start.
   *
   * @param int $sheetIndex Sheet index (0-based)
   * @param int $row row number
   */
  private function generateRowStart(Worksheet $worksheet, int $sheetIndex, int $row): string
  {
    $html = '';
    if (count($worksheet->getBreaks()) > 0) {
      $breaks = $worksheet->getRowBreaks();

      // check if a break is needed before this row
      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 .= $this->generateTableHeader($worksheet, false);
        $html .= '<tbody>' . PHP_EOL;
      }
    }

    // Write row start
    if (!$this->useInlineCss) {
      $html .= '          <tr class="row' . $row . '">' . PHP_EOL;
    } else {
      $style = isset($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(Worksheet $worksheet, string $cellAddress, int $row, int $columnNumber): array
  {
    $cell = ($cellAddress > '') ? $worksheet->getCellCollection()->get($cellAddress) : '';
    $coordinate = Coordinate::stringFromColumnIndex($columnNumber + 1) . ($row + 1);
    if (!$this->useInlineCss) {
      $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(RichText $richText): string
  {
    $cellData = '';
    // Loop through rich text elements
    $elements = $richText->getRichTextElements();
    foreach ($elements as $element) {
      // Rich text start?
      if ($element instanceof Run) {
        $cellEnd = '';
        if ($element->getFont() !== null) {
          $cellData .= '<span style="' . $this->assembleCSS($this->createCSSStyleFont($element->getFont())) . '">';

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

        // Convert UTF8 data to PCDATA
        $cellText = $element->getText();
        $cellData .= htmlspecialchars($cellText, Settings::htmlEntityFlags());

        $cellData .= $cellEnd;

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

    return nl2br($cellData);
  }

  private function generateRowCellDataValue(Worksheet $worksheet, Cell $cell, string &$cellData): void
  {
    if ($cell->getValue() instanceof RichText) {
      $cellData .= $this->generateRowCellDataValueRich($cell->getValue());
    } else {
      $origData = $this->preCalculateFormulas ? $cell->getCalculatedValue() : $cell->getValue();
      $origData2 = $this->preCalculateFormulas ? $cell->getCalculatedValueString() : $cell->getValueString();
      $formatCode = $worksheet->getParentOrThrow()->getCellXfByIndex($cell->getXfIndex())->getNumberFormat()->getFormatCode();

      $cellData = NumberFormat::toFormattedString(
        $origData2,
        $formatCode ?? NumberFormat::FORMAT_GENERAL,
        [$this, 'formatColor']
      );

      if ($cellData === $origData) {
        $cellData = htmlspecialchars($cellData, Settings::htmlEntityFlags());
      }
      if ($worksheet->getParentOrThrow()->getCellXfByIndex($cell->getXfIndex())->getFont()->getSuperscript()) {
        $cellData = '<sup>' . $cellData . '</sup>';
      } elseif ($worksheet->getParentOrThrow()->getCellXfByIndex($cell->getXfIndex())->getFont()->getSubscript()) {
        $cellData = '<sub>' . $cellData . '</sub>';
      }
    }
  }

  private function generateRowCellData(Worksheet $worksheet, null|Cell|string $cell, array|string &$cssClass): string
  {
    $cellData = '&nbsp;';
    if ($cell instanceof Cell) {
      $cellData = '';
      // Don't know what this does, and no test cases.
      //if ($cell->getParent() === null) {
      //    $cell->attach($worksheet);
      //}
      // Value
      $this->generateRowCellDataValue($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 = (string) preg_replace('/(?m)(?:^|\\G) /', '&nbsp;', $cellData);

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

      // Extend CSS class?
      if (!$this->useInlineCss && is_string($cssClass)) {
        $cssClass .= ' style' . $cell->getXfIndex();
        $cssClass .= ' ' . $cell->getDataType();
      } elseif (is_array($cssClass)) {
        $index = $cell->getXfIndex();
        $styleIndex = 'td.style' . $index . ', th.style' . $index;
        if (isset($this->cssStyles[$styleIndex])) {
          $cssClass = array_merge($cssClass, $this->cssStyles[$styleIndex]);
        }

        // General horizontal alignment: Actual horizontal alignment depends on dataType
        $sharedStyle = $worksheet->getParentOrThrow()->getCellXfByIndex($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(Worksheet $worksheet, string $coordinate): string
  {
    return $this->includeCharts ? $this->writeChartInCell($worksheet, $coordinate) : '';
  }

  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(
    string &$html,
    Worksheet $worksheet,
    string $coordinate,
    string $cellType,
    string $cellData,
    int $colSpan,
    int $rowSpan,
    array|string $cssClass,
    int $colNum,
    int $sheetIndex,
    int $row
  ): void {
    // Image?
    $htmlx = $this->writeImageInCell($coordinate);
    // Chart?
    $htmlx .= $this->generateRowIncludeCharts($worksheet, $coordinate);
    // Column start
    $html .= '            <' . $cellType;
    if (!$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) {
        $xcssClass = is_array($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'] = (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' . $row]['height'])) {
        $height = $this->cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $row]['height'];
        $xcssClass['height'] = $height;
      }
      //** end of redundant code **
      if ($this->useInlineCss) {
        foreach (['border-top', 'border-bottom', 'border-right', 'border-left'] as $borderType) {
          if (($xcssClass[$borderType] ?? '') === 'none #000000') {
            unset($xcssClass[$borderType]);
          }
        }
      }

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

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

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

    // Cell data
    $html .= $cellData;

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

  /**
   * Generate row.
   *
   * @param array $values Array containing cells in a row
   * @param int $row Row number (0-based)
   * @param string $cellType eg: 'td'
   */
  private function generateRow(Worksheet $worksheet, array $values, int $row, string $cellType): string
  {
    // Sheet index
    $sheetIndex = $worksheet->getParentOrThrow()->getIndex($worksheet);
    $html = $this->generateRowStart($worksheet, $sheetIndex, $row);

    // Write cells
    $colNum = 0;
    foreach ($values as $cellAddress) {
      [$cell, $cssClass, $coordinate] = $this->generateRowCellCss($worksheet, $cellAddress, $row, $colNum);

      // Cell Data
      $cellData = $this->generateRowCellData($worksheet, $cell, $cssClass);

      // Hyperlink?
      if ($worksheet->hyperlinkExists($coordinate) && !$worksheet->getHyperlink($coordinate)->isInternal()) {
        $url = $worksheet->getHyperlink($coordinate)->getUrl();
        $urldecode = strtolower(html_entity_decode(trim($url), encoding: 'UTF-8'));
        $parseScheme = preg_match('/^(\\w+):/', $urldecode, $matches);
        if ($parseScheme === 1 && !in_array($matches[1], ['http', 'https', 'file', 'ftp', 's3'], true)) {
          $cellData = htmlspecialchars($url, Settings::htmlEntityFlags());
        } else {
          $cellData = '<a href="' . htmlspecialchars($url, 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[$worksheet->getParentOrThrow()->getIndex($worksheet)][$row + 1][$colNum])
        && $this->isSpannedCell[$worksheet->getParentOrThrow()->getIndex($worksheet)][$row + 1][$colNum]);

      // Colspan and Rowspan
      $colSpan = 1;
      $rowSpan = 1;
      if (isset($this->isBaseCell[$worksheet->getParentOrThrow()->getIndex($worksheet)][$row + 1][$colNum])) {
        $spans = $this->isBaseCell[$worksheet->getParentOrThrow()->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 + $colSpan) . ($row + $rowSpan);
        if (!$this->useInlineCss) {
          $cssClass .= ' style' . $worksheet->getCell($endCellCoord)->getXfIndex();
        } else {
          $endBorders = $this->spreadsheet->getCellXfByIndex($worksheet->getCell($endCellCoord)->getXfIndex())->getBorders();
          $altBorders = $this->createCSSStyleBorders($endBorders);
          foreach ($altBorders as $altKey => $altValue) {
            if (str_contains($altValue, '!important')) {
              $cssClass[$altKey] = $altValue;
            }
          }
        }
      }

      // Write
      if ($writeCell) {
        $this->generateRowWriteCell($html, $worksheet, $coordinate, $cellType, $cellData, $colSpan, $rowSpan, $cssClass, $colNum, $sheetIndex, $row);
      }

      // Next column
      ++$colNum;
    }

    // Write row end
    $html .= '          </tr>' . PHP_EOL;

    // Return
    return $html;
  }

  /**
   * Takes array where of CSS properties / values and converts to CSS string.
   */
  private function assembleCSS(array $values = []): string
  {
    $pairs = [];
    foreach ($values as $property => $value) {
      $pairs[] = $property . ':' . $value;
    }
    $string = implode('; ', $pairs);

    return $string;
  }

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

  /**
   * Set images root.
   *
   * @return $this
   */
  public function setImagesRoot(string $imagesRoot): static
  {
    $this->imagesRoot = $imagesRoot;

    return $this;
  }

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

  /**
   * Set embed images.
   *
   * @return $this
   */
  public function setEmbedImages(bool $embedImages): static
  {
    $this->embedImages = $embedImages;

    return $this;
  }

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

  /**
   * Set use inline CSS?
   *
   * @return $this
   */
  public function setUseInlineCss(bool $useInlineCss): static
  {
    $this->useInlineCss = $useInlineCss;

    return $this;
  }

  /**
   * Add color to formatted string as inline style.
   *
   * @param string $value Plain formatted value without color
   * @param string $format Format code
   */
  public function formatColor(string $value, string $format): string
  {
    // Color information, e.g. [Red] is always at the beginning
    $color = null; // initialize
    $matches = [];

    $color_regex = '/^\\[[a-zA-Z]+\\]/';
    if (preg_match($color_regex, $format, $matches)) {
      $color = str_replace(['[', ']'], '', $matches[0]);
      $color = strtolower($color);
    }

    // convert to PCDATA
    $result = htmlspecialchars($value, Settings::htmlEntityFlags());

    // color span tag
    if ($color !== null) {
      $result = '<span style="color:' . $color . '">' . $result . '</span>';
    }

    return $result;
  }

  /**
   * Calculate information about HTML colspan and rowspan which is not always the same as Excel's.
   */
  private function calculateSpans(): void
  {
    if ($this->spansAreCalculated) {
      return;
    }
    // Identify all cells that should be omitted in HTML due to cell merge.
    // In HTML only the upper-left cell should be written and it should have
    //   appropriate rowspan / colspan attribute
    if (is_array($this->sheetIndex)) {
      $sheetIndexes = $this->sheetIndex;
    } else {
      $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, $fr] = Coordinate::indexesFromString($first);
        $fc = $fc - 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(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, $adjustedBaseCells, true)) {
            // subtract rowspan by 1
            --$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
   */
  private function writeComment(Worksheet $worksheet, string $coordinate): string
  {
    $result = '';
    if (!$this->isPdf && isset($worksheet->getComments()[$coordinate])) {
      $sanitizedString = $this->generateRowCellDataValueRich($worksheet->getComment($coordinate)->getText());
      $dir = ($worksheet->getComment($coordinate)->getTextboxDirection() === Comment::TEXTBOX_DIRECTION_RTL) ? ' dir="rtl"' : '';
      $align = strtolower($worksheet->getComment($coordinate)->getAlignment());
      $alignment = Alignment::HORIZONTAL_ALIGNMENT_FOR_HTML[$align] ?? '';
      if ($alignment !== '') {
        $alignment = " style=\"text-align:$alignment\"";
      }
      if ($sanitizedString !== '') {
        $result .= '<a class="comment-indicator"></a>';
        $result .= "<div class=\"comment\"$dir$alignment>" . $sanitizedString . '</div>';
        $result .= PHP_EOL;
      }
    }

    return $result;
  }

  public function getOrientation(): ?string
  {
    // Expect Pdf classes to override this method.
    return $this->isPdf ? PageSetup::ORIENTATION_PORTRAIT : null;
  }

  /**
   * Generate @page declarations.
   */
  private function generatePageDeclarations(bool $generateSurroundingHTML): string
  {
    // Ensure that Spans have been calculated?
    $this->calculateSpans();

    // Fetch sheets
    $sheets = [];
    if (is_array($this->sheetIndex)) {
      foreach ($this->sheetIndex as $sheetIndex) {
        $sheets[] = $this->spreadsheet->getSheet($sheetIndex);
      }
    } elseif ($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 $worksheet) {
      $htmlPage .= "@page page$sheetId { ";
      $left = StringHelper::formatNumber($worksheet->getPageMargins()->getLeft()) . 'in; ';
      $htmlPage .= 'margin-left: ' . $left;
      $right = StringHelper::FormatNumber($worksheet->getPageMargins()->getRight()) . 'in; ';
      $htmlPage .= 'margin-right: ' . $right;
      $top = StringHelper::FormatNumber($worksheet->getPageMargins()->getTop()) . 'in; ';
      $htmlPage .= 'margin-top: ' . $top;
      $bottom = StringHelper::FormatNumber($worksheet->getPageMargins()->getBottom()) . 'in; ';
      $htmlPage .= 'margin-bottom: ' . $bottom;
      $orientation = $this->getOrientation() ?? $worksheet->getPageSetup()->getOrientation();
      if ($orientation === PageSetup::ORIENTATION_LANDSCAPE) {
        $htmlPage .= 'size: landscape; ';
      } elseif ($orientation === PageSetup::ORIENTATION_PORTRAIT) {
        $htmlPage .= 'size: portrait; ';
      }
      $htmlPage .= '}' . PHP_EOL;
      ++$sheetId;
    }
    $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;
  }

  private function shouldGenerateRow(Worksheet $sheet, int $row): bool
  {
    if (!($this instanceof Pdf\Mpdf || $this instanceof Pdf\Tcpdf)) {
      return true;
    }

    return $sheet->isRowVisible($row);
  }

  private function shouldGenerateColumn(Worksheet $sheet, string $colStr): bool
  {
    if (!($this instanceof Pdf\Mpdf || $this instanceof Pdf\Tcpdf)) {
      return true;
    }
    if (!$sheet->columnDimensionExists($colStr)) {
      return true;
    }

    return $sheet->getColumnDimension($colStr)->getVisible();
  }
}

PHPOffice / PhpSpreadsheet

Pull Request — master (#4204)

Html::generateRowCellCss() A

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