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<?php
namespace PhpOffice\PhpSpreadsheet\Worksheet;
use Iterator;
use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
/**
* @implements Iterator<int, Row>
*/
class RowIterator implements Iterator
{
/**
* Worksheet to iterate.
*
* @var Worksheet
*/
private $subject;
/**
* Current iterator position.
*
* @var int
*/
private $position = 1;
/**
* 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 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, $startRow = 1, $endRow = null)
{
// Set subject
$this->subject = $subject;
$this->resetEnd($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
*
* @return $this
*/
public function resetStart(int $startRow = 1)
{
if ($startRow > $this->subject->getHighestRow()) {
throw new PhpSpreadsheetException(
"Start row ({$startRow}) is beyond highest row ({$this->subject->getHighestRow()})"
);
}
$this->startRow = $startRow;
if ($this->endRow < $this->startRow) {
$this->endRow = $this->startRow;
}
$this->seek($startRow);
return $this;
}
/**
* (Re)Set the end row.
*
* @param int $endRow The row number at which to stop iterating
*
* @return $this
*/
public function resetEnd($endRow = null)
{
$this->endRow = $endRow ?: $this->subject->getHighestRow();
return $this;
}
/**
* Set the row pointer to the selected row.
*
* @param int $row The row number to set the current pointer at
*
* @return $this
*/
public function seek(int $row = 1)
{
if (($row < $this->startRow) || ($row > $this->endRow)) {
throw new PhpSpreadsheetException("Row $row is out of range ({$this->startRow} - {$this->endRow})");
}
$this->position = $row;
return $this;
}
/**
* Rewind the iterator to the starting row.
*/
public function rewind(): void
{
$this->position = $this->startRow;
}
/**
* Return the current row in this worksheet.
*/
public function current(): Row
{
return new Row($this->subject, $this->position);
}
/**
* Return the current iterator key.
*/
public function key(): int
{
return $this->position;
}
/**
* Set the iterator to its next value.
*/
public function next(): void
{
++$this->position;
}
/**
* Set the iterator to its previous value.
*/
public function prev(): void
{
--$this->position;
}
/**
* Indicate if more rows exist in the worksheet range of rows that we're iterating.
*/
public function valid(): bool
{
return $this->position <= $this->endRow && $this->position >= $this->startRow;
}
}
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