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File Content: `CellReferenceHelper.php`

<?php

namespace PhpOffice\PhpSpreadsheet;

use PhpOffice\PhpSpreadsheet\Cell\AddressRange;
use PhpOffice\PhpSpreadsheet\Cell\Coordinate;

class CellReferenceHelper
{
    /**
     * @var string
     */
    protected $beforeCellAddress;

    /**
     * @var int
     */
    protected $beforeColumn;

    /**
     * @var int
     */
    protected $beforeRow;

    /**
     * @var int
     */
    protected $numberOfColumns;

    /**
     * @var int
     */
    protected $numberOfRows;

    public function __construct(string $beforeCellAddress = 'A1', int $numberOfColumns = 0, int $numberOfRows = 0)
    {
        $this->beforeCellAddress = str_replace('$', '', $beforeCellAddress);
        $this->numberOfColumns = $numberOfColumns;
        $this->numberOfRows = $numberOfRows;

        // Get coordinate of $beforeCellAddress
        [$beforeColumn, $beforeRow] = Coordinate::coordinateFromString($beforeCellAddress);
        $this->beforeColumn = (int) Coordinate::columnIndexFromString($beforeColumn);
        $this->beforeRow = (int) $beforeRow;
    }

    public function beforeCellAddress(): string
    {
        return $this->beforeCellAddress;
    }

    public function refreshRequired(string $beforeCellAddress, int $numberOfColumns, int $numberOfRows): bool
    {
        return $this->beforeCellAddress !== $beforeCellAddress ||
            $this->numberOfColumns !== $numberOfColumns ||
            $this->numberOfRows !== $numberOfRows;
    }

    public function updateCellReference(string $cellReference = 'A1', bool $includeAbsoluteReferences = false): string
    {
        if (Coordinate::coordinateIsRange($cellReference)) {
            throw new Exception('Only single cell references may be passed to this method.');
        }

        // Get coordinate of $cellReference
        [$newColumn, $newRow] = Coordinate::coordinateFromString($cellReference);
        $newColumnIndex = (int) Coordinate::columnIndexFromString(str_replace('$', '', $newColumn));
        $newRowIndex = (int) str_replace('$', '', $newRow);

        $absoluteColumn = $newColumn[0] === '$' ? '$' : '';
        $absoluteRow = $newRow[0] === '$' ? '$' : '';
        // Verify which parts should be updated
        if ($includeAbsoluteReferences === false) {
            $updateColumn = (($absoluteColumn !== '$') && $newColumnIndex >= $this->beforeColumn);
            $updateRow = (($absoluteRow !== '$') && $newRowIndex >= $this->beforeRow);
        } else {
            $updateColumn = ($newColumnIndex >= $this->beforeColumn);
            $updateRow = ($newRowIndex >= $this->beforeRow);
        }

        // Create new column reference
        if ($updateColumn) {
            $newColumn = $this->updateColumnReference($newColumnIndex, $absoluteColumn);
        }

        // Create new row reference
        if ($updateRow) {
            $newRow = $this->updateRowReference($newRowIndex, $absoluteRow);
        }

        // Return new reference
        return "{$newColumn}{$newRow}";
    }

    public function cellAddressInDeleteRange(string $cellAddress): bool
    {
        [$cellColumn, $cellRow] = Coordinate::coordinateFromString($cellAddress);
        $cellColumnIndex = Coordinate::columnIndexFromString($cellColumn);
        //    Is cell within the range of rows/columns if we're deleting
        if (
            $this->numberOfRows < 0 &&
            ($cellRow >= ($this->beforeRow + $this->numberOfRows)) &&
            ($cellRow < $this->beforeRow)
        ) {
            return true;
        } elseif (
            $this->numberOfColumns < 0 &&
            ($cellColumnIndex >= ($this->beforeColumn + $this->numberOfColumns)) &&
            ($cellColumnIndex < $this->beforeColumn)
        ) {
            return true;
        }

        return false;
    }

    protected function updateColumnReference(int $newColumnIndex, string $absoluteColumn): string
    {
        $newColumn = Coordinate::stringFromColumnIndex(min($newColumnIndex + $this->numberOfColumns, AddressRange::MAX_COLUMN_INT));

        return "{$absoluteColumn}{$newColumn}";
    }

    protected function updateRowReference(int $newRowIndex, string $absoluteRow): string
    {
        $newRow = $newRowIndex + $this->numberOfRows;
        $newRow = ($newRow > AddressRange::MAX_ROW) ? AddressRange::MAX_ROW : $newRow;

        return "{$absoluteRow}{$newRow}";
    }
}

Name	Size	Permission
Calculation	---	0755
Cell	---	0755
Chart	---	0755
Collection	---	0755
Document	---	0755
Helper	---	0755
Reader	---	0755
RichText	---	0755
Shared	---	0755
Style	---	0755
Worksheet	---	0755
Writer	---	0755
CellReferenceHelper.php	4358 bytes	0644
Comment.php	7531 bytes	0644
DefinedName.php	6567 bytes	0644
Exception.php	83 bytes	0644
HashTable.php	3846 bytes	0644
IComparable.php	182 bytes	0644
IOFactory.php	9020 bytes	0644
NamedFormula.php	973 bytes	0644
NamedRange.php	1250 bytes	0644
ReferenceHelper.php	55330 bytes	0644
Settings.php	5907 bytes	0644
Spreadsheet.php	46818 bytes	0644
Theme.php	7171 bytes	0644

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File Content: CellReferenceHelper.php

File Content: `CellReferenceHelper.php`