<?php

namespace PhpOffice\PhpSpreadsheet\Worksheet;


> use PhpOffice\PhpSpreadsheet\Cell\Cell;


use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;


> /**
class ColumnCellIterator extends CellIterator
>  * @extends CellIterator<int>
{
>  */


    /**
     * Current iterator position.
     *
     * @var int
     */
    private $currentRow;

    /**
     * Column index.
     *

<      * @var string



>      * @var int


     */
    private $columnIndex;

    /**
     * Start position.
     *
     * @var int
     */
    private $startRow = 1;

    /**
     * End position.
     *
     * @var int
     */
    private $endRow = 1;

    /**
     * Create a new row iterator.
     *

<      * @param Worksheet $subject The worksheet to iterate over



>      * @param Worksheet $worksheet The worksheet to iterate over


     * @param string $columnIndex The column that we want to iterate
     * @param int $startRow The row number at which to start iterating
     * @param int $endRow Optionally, the row number at which to stop iterating
     */

<     public function __construct(Worksheet $subject = null, $columnIndex = 'A', $startRow = 1, $endRow = null)



>     public function __construct(Worksheet $worksheet, $columnIndex = 'A', $startRow = 1, $endRow = null)


    {
        // Set subject

<         $this->worksheet = $subject;



>         $this->worksheet = $worksheet;
>         $this->cellCollection = $worksheet->getCellCollection();


        $this->columnIndex = Coordinate::columnIndexFromString($columnIndex);
        $this->resetEnd($endRow);
        $this->resetStart($startRow);
    }

    /**
     * (Re)Set the start row and the current row pointer.
     *
     * @param int $startRow The row number at which to start iterating
     *

<      * @throws PhpSpreadsheetException
<      *
<      * @return ColumnCellIterator



>      * @return $this


     */

<     public function resetStart($startRow = 1)



>     public function resetStart(int $startRow = 1)


    {
        $this->startRow = $startRow;
        $this->adjustForExistingOnlyRange();
        $this->seek($startRow);

        return $this;
    }

    /**
     * (Re)Set the end row.
     *
     * @param int $endRow The row number at which to stop iterating
     *

<      * @throws PhpSpreadsheetException
<      *
<      * @return ColumnCellIterator



>      * @return $this


     */
    public function resetEnd($endRow = null)
    {

<         $this->endRow = ($endRow) ? $endRow : $this->worksheet->getHighestRow();



>         $this->endRow = $endRow ?: $this->worksheet->getHighestRow();


        $this->adjustForExistingOnlyRange();

        return $this;
    }

    /**
     * Set the row pointer to the selected row.
     *
     * @param int $row The row number to set the current pointer at
     *

<      * @throws PhpSpreadsheetException
<      *
<      * @return ColumnCellIterator



>      * @return $this


     */

<     public function seek($row = 1)



>     public function seek(int $row = 1)


    {

>         if (
        if (($row < $this->startRow) || ($row > $this->endRow)) {
>             $this->onlyExistingCells &&
            throw new PhpSpreadsheetException("Row $row is out of range ({$this->startRow} - {$this->endRow})");
>             (!$this->cellCollection->has(Coordinate::stringFromColumnIndex($this->columnIndex) . $row))
        } elseif ($this->onlyExistingCells && !($this->worksheet->cellExistsByColumnAndRow($this->columnIndex, $row))) {
>         ) {
            throw new PhpSpreadsheetException('In "IterateOnlyExistingCells" mode and Cell does not exist');
>             throw new PhpSpreadsheetException('In "IterateOnlyExistingCells" mode and Cell does not exist');
        }
>         }



<         } elseif ($this->onlyExistingCells && !($this->worksheet->cellExistsByColumnAndRow($this->columnIndex, $row))) {
<             throw new PhpSpreadsheetException('In "IterateOnlyExistingCells" mode and Cell does not exist');


        return $this;
    }

    /**
     * Rewind the iterator to the starting row.
     */

<     public function rewind()



>     public function rewind(): void


    {
        $this->currentRow = $this->startRow;
    }

    /**
     * Return the current cell in this worksheet column.

<      *
<      * @return null|\PhpOffice\PhpSpreadsheet\Cell\Cell


     */

<     public function current()



>     public function current(): ?Cell


    {

<         return $this->worksheet->getCellByColumnAndRow($this->columnIndex, $this->currentRow);



>         $cellAddress = Coordinate::stringFromColumnIndex($this->columnIndex) . $this->currentRow;
> 
>         return $this->cellCollection->has($cellAddress)
>             ? $this->cellCollection->get($cellAddress)
>             : $this->worksheet->createNewCell($cellAddress);


    }

    /**
     * Return the current iterator key.

<      *
<      * @return int


     */

<     public function key()



>     public function key(): int


    {
        return $this->currentRow;
    }

    /**
     * Set the iterator to its next value.
     */

<     public function next()



>     public function next(): void


    {

>         $columnAddress = Coordinate::stringFromColumnIndex($this->columnIndex);


        do {
            ++$this->currentRow;

<         } while (($this->onlyExistingCells) &&
<             (!$this->worksheet->cellExistsByColumnAndRow($this->columnIndex, $this->currentRow)) &&
<             ($this->currentRow <= $this->endRow));



>         } while (
>             ($this->onlyExistingCells) &&
>             ($this->currentRow <= $this->endRow) &&
>             (!$this->cellCollection->has($columnAddress . $this->currentRow))
>         );


    }

    /**
     * Set the iterator to its previous value.
     */

<     public function prev()



>     public function prev(): void


    {

>         $columnAddress = Coordinate::stringFromColumnIndex($this->columnIndex);


        do {
            --$this->currentRow;

<         } while (($this->onlyExistingCells) &&
<             (!$this->worksheet->cellExistsByColumnAndRow($this->columnIndex, $this->currentRow)) &&
<             ($this->currentRow >= $this->startRow));



>         } while (
>             ($this->onlyExistingCells) &&
>             ($this->currentRow >= $this->startRow) &&
>             (!$this->cellCollection->has($columnAddress . $this->currentRow))
>         );


    }

    /**
     * Indicate if more rows exist in the worksheet range of rows that we're iterating.

<      *
<      * @return bool


     */

<     public function valid()



>     public function valid(): bool


    {
        return $this->currentRow <= $this->endRow && $this->currentRow >= $this->startRow;
    }

    /**
     * Validate start/end values for "IterateOnlyExistingCells" mode, and adjust if necessary.

<      *
<      * @throws PhpSpreadsheetException


     */

<     protected function adjustForExistingOnlyRange()



>     protected function adjustForExistingOnlyRange(): void


    {
        if ($this->onlyExistingCells) {

<             while ((!$this->worksheet->cellExistsByColumnAndRow($this->columnIndex, $this->startRow)) &&
<                 ($this->startRow <= $this->endRow)) {



>             $columnAddress = Coordinate::stringFromColumnIndex($this->columnIndex);
>             while (
>                 (!$this->cellCollection->has($columnAddress . $this->startRow)) &&
>                 ($this->startRow <= $this->endRow)
>             ) {


                ++$this->startRow;
            }

<             if ($this->startRow > $this->endRow) {
<                 throw new PhpSpreadsheetException('No cells exist within the specified range');
<             }
<             while ((!$this->worksheet->cellExistsByColumnAndRow($this->columnIndex, $this->endRow)) &&
<                 ($this->endRow >= $this->startRow)) {



>             while (
>                 (!$this->cellCollection->has($columnAddress . $this->endRow)) &&
>                 ($this->endRow >= $this->startRow)
>             ) {


                --$this->endRow;

<             }
<             if ($this->endRow < $this->startRow) {
<                 throw new PhpSpreadsheetException('No cells exist within the specified range');


            }
        }
    }
}