<?php

namespace PhpOffice\PhpSpreadsheet\Worksheet;


> use PhpOffice\PhpSpreadsheet\Cell\Cell;


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


> /**
class RowCellIterator extends CellIterator
>  * @extends CellIterator<string>
{
>  */


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

    /**
     * Row index.
     *
     * @var int
     */
    private $rowIndex = 1;

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

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

    /**
     * Create a new column iterator.
     *
     * @param Worksheet $worksheet The worksheet to iterate over
     * @param int $rowIndex The row that we want to iterate
     * @param string $startColumn The column address at which to start iterating
     * @param string $endColumn Optionally, the column address at which to stop iterating
     */

<     public function __construct(Worksheet $worksheet = null, $rowIndex = 1, $startColumn = 'A', $endColumn = null)



>     public function __construct(Worksheet $worksheet, $rowIndex = 1, $startColumn = 'A', $endColumn = null)


    {
        // Set subject and row index
        $this->worksheet = $worksheet;

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


        $this->rowIndex = $rowIndex;
        $this->resetEnd($endColumn);
        $this->resetStart($startColumn);
    }

    /**
     * (Re)Set the start column and the current column pointer.
     *
     * @param string $startColumn The column address at which to start iterating
     *

<      * @throws PhpSpreadsheetException
<      *
<      * @return RowCellIterator



>      * @return $this


     */

<     public function resetStart($startColumn = 'A')



>     public function resetStart(string $startColumn = 'A')


    {
        $this->startColumnIndex = Coordinate::columnIndexFromString($startColumn);
        $this->adjustForExistingOnlyRange();
        $this->seek(Coordinate::stringFromColumnIndex($this->startColumnIndex));

        return $this;
    }

    /**
     * (Re)Set the end column.
     *
     * @param string $endColumn The column address at which to stop iterating
     *

<      * @throws PhpSpreadsheetException
<      *
<      * @return RowCellIterator



>      * @return $this


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

<         $endColumn = $endColumn ? $endColumn : $this->worksheet->getHighestColumn();



>         $endColumn = $endColumn ?: $this->worksheet->getHighestColumn();


        $this->endColumnIndex = Coordinate::columnIndexFromString($endColumn);
        $this->adjustForExistingOnlyRange();

        return $this;
    }

    /**
     * Set the column pointer to the selected column.
     *
     * @param string $column The column address to set the current pointer at
     *

<      * @throws PhpSpreadsheetException
<      *
<      * @return RowCellIterator



>      * @return $this


     */

<     public function seek($column = 'A')



>     public function seek(string $column = 'A')


    {

<         $column = Coordinate::columnIndexFromString($column);
<         if (($column < $this->startColumnIndex) || ($column > $this->endColumnIndex)) {
<             throw new PhpSpreadsheetException("Column $column is out of range ({$this->startColumnIndex} - {$this->endColumnIndex})");
<         } elseif ($this->onlyExistingCells && !($this->worksheet->cellExistsByColumnAndRow($column, $this->rowIndex))) {



>         $columnId = Coordinate::columnIndexFromString($column);
>         if ($this->onlyExistingCells && !($this->cellCollection->has($column . $this->rowIndex))) {


            throw new PhpSpreadsheetException('In "IterateOnlyExistingCells" mode and Cell does not exist');
        }

<         $this->currentColumnIndex = $column;



>         if (($columnId < $this->startColumnIndex) || ($columnId > $this->endColumnIndex)) {
>             throw new PhpSpreadsheetException("Column $column is out of range ({$this->startColumnIndex} - {$this->endColumnIndex})");
>         }
>         $this->currentColumnIndex = $columnId;



        return $this;
    }

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

<     public function rewind()



>     public function rewind(): void


    {
        $this->currentColumnIndex = $this->startColumnIndex;
    }

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

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


     */

<     public function current()



>     public function current(): ?Cell


    {

<         return $this->worksheet->getCellByColumnAndRow($this->currentColumnIndex, $this->rowIndex);



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


    }

    /**
     * Return the current iterator key.

<      *
<      * @return string


     */

<     public function key()



>     public function key(): string


    {
        return Coordinate::stringFromColumnIndex($this->currentColumnIndex);
    }

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

<     public function next()



>     public function next(): void


    {
        do {
            ++$this->currentColumnIndex;

<         } while (($this->onlyExistingCells) && (!$this->worksheet->cellExistsByColumnAndRow($this->currentColumnIndex, $this->rowIndex)) && ($this->currentColumnIndex <= $this->endColumnIndex));



>         } while (($this->onlyExistingCells) && (!$this->cellCollection->has(Coordinate::stringFromColumnIndex($this->currentColumnIndex) . $this->rowIndex)) && ($this->currentColumnIndex <= $this->endColumnIndex));


    }

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

<      *
<      * @throws PhpSpreadsheetException


     */

<     public function prev()



>     public function prev(): void


    {
        do {
            --$this->currentColumnIndex;

<         } while (($this->onlyExistingCells) && (!$this->worksheet->cellExistsByColumnAndRow($this->currentColumnIndex, $this->rowIndex)) && ($this->currentColumnIndex >= $this->startColumnIndex));



>         } while (($this->onlyExistingCells) && (!$this->cellCollection->has(Coordinate::stringFromColumnIndex($this->currentColumnIndex) . $this->rowIndex)) && ($this->currentColumnIndex >= $this->startColumnIndex));


    }

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

<      *
<      * @return bool


     */

<     public function valid()



>     public function valid(): bool


    {
        return $this->currentColumnIndex <= $this->endColumnIndex && $this->currentColumnIndex >= $this->startColumnIndex;
    }

    /**
     * Return the current iterator position.

<      *
<      * @return int


     */

<     public function getCurrentColumnIndex()



>     public function getCurrentColumnIndex(): int


    {
        return $this->currentColumnIndex;
    }

    /**
     * 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->startColumnIndex, $this->rowIndex)) && ($this->startColumnIndex <= $this->endColumnIndex)) {



>             while ((!$this->cellCollection->has(Coordinate::stringFromColumnIndex($this->startColumnIndex) . $this->rowIndex)) && ($this->startColumnIndex <= $this->endColumnIndex)) {


                ++$this->startColumnIndex;
            }

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



>             while ((!$this->cellCollection->has(Coordinate::stringFromColumnIndex($this->endColumnIndex) . $this->rowIndex)) && ($this->endColumnIndex >= $this->startColumnIndex)) {


                --$this->endColumnIndex;

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


            }
        }
    }
}