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<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2014 PHPExcel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPExcel
* @package PHPExcel_Worksheet
* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version ##VERSION##, ##DATE##
*/
/**
* PHPExcel_Worksheet_ColumnCellIterator
*
* Used to iterate columns in a PHPExcel_Worksheet
*
* @category PHPExcel
* @package PHPExcel_Worksheet
* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
*/
class PHPExcel_Worksheet_ColumnCellIterator extends PHPExcel_Worksheet_CellIterator implements Iterator
{
/**
* Column index
*
* @var string
*/
protected $_columnIndex;
/**
* Start position
*
* @var int
*/
protected $_startRow = 1;
/**
* End position
*
* @var int
*/
protected $_endRow = 1;
/**
* Create a new row iterator
*
* @param PHPExcel_Worksheet $subject The worksheet to iterate over
* @param string $columnIndex The column that we want to iterate
* @param integer $startRow The row number at which to start iterating
* @param integer $endRow Optionally, the row number at which to stop iterating
*/
public function __construct(PHPExcel_Worksheet $subject = null, $columnIndex, $startRow = 1, $endRow = null) {
// Set subject
$this->_subject = $subject;
$this->_columnIndex = PHPExcel_Cell::columnIndexFromString($columnIndex) - 1;
$this->resetEnd($endRow);
$this->resetStart($startRow);
}
/**
* Destructor
*/
public function __destruct() {
unset($this->_subject);
}
/**
* (Re)Set the start row and the current row pointer
*
* @param integer $startRow The row number at which to start iterating
* @return PHPExcel_Worksheet_ColumnCellIterator
* @throws PHPExcel_Exception
*/
public function resetStart($startRow = 1) {
$this->_startRow = $startRow;
$this->adjustForExistingOnlyRange();
$this->seek($startRow);
return $this;
}
/**
* (Re)Set the end row
*
* @param integer $endRow The row number at which to stop iterating
* @return PHPExcel_Worksheet_ColumnCellIterator
* @throws PHPExcel_Exception
*/
public function resetEnd($endRow = null) {
$this->_endRow = ($endRow) ? $endRow : $this->_subject->getHighestRow();
$this->adjustForExistingOnlyRange();
return $this;
}
/**
* Set the row pointer to the selected row
*
* @param integer $row The row number to set the current pointer at
* @return PHPExcel_Worksheet_ColumnCellIterator
* @throws PHPExcel_Exception
*/
public function seek($row = 1) {
if (($row < $this->_startRow) || ($row > $this->_endRow)) {
throw new PHPExcel_Exception("Row $row is out of range ({$this->_startRow} - {$this->_endRow})");
} elseif ($this->_onlyExistingCells && !($this->_subject->cellExistsByColumnAndRow($this->_columnIndex, $row))) {
throw new PHPExcel_Exception('In "IterateOnlyExistingCells" mode and Cell does not exist');
}
$this->_position = $row;
return $this;
}
/**
* Rewind the iterator to the starting row
*/
public function rewind() {
$this->_position = $this->_startRow;
}
/**
* Return the current cell in this worksheet column
*
* @return PHPExcel_Worksheet_Row
*/
public function current() {
return $this->_subject->getCellByColumnAndRow($this->_columnIndex, $this->_position);
}
/**
* Return the current iterator key
*
* @return int
*/
public function key() {
return $this->_position;
}
/**
* Set the iterator to its next value
*/
public function next() {
do {
++$this->_position;
} while (($this->_onlyExistingCells) &&
(!$this->_subject->cellExistsByColumnAndRow($this->_columnIndex, $this->_position)) &&
($this->_position <= $this->_endRow));
}
/**
* Set the iterator to its previous value
*/
public function prev() {
if ($this->_position <= $this->_startRow) {
throw new PHPExcel_Exception("Row is already at the beginning of range ({$this->_startRow} - {$this->_endRow})");
}
do {
--$this->_position;
} while (($this->_onlyExistingCells) &&
(!$this->_subject->cellExistsByColumnAndRow($this->_columnIndex, $this->_position)) &&
($this->_position >= $this->_startRow));
}
/**
* Indicate if more rows exist in the worksheet range of rows that we're iterating
*
* @return boolean
*/
public function valid() {
return $this->_position <= $this->_endRow;
}
/**
* Validate start/end values for "IterateOnlyExistingCells" mode, and adjust if necessary
*
* @throws PHPExcel_Exception
*/
protected function adjustForExistingOnlyRange() {
if ($this->_onlyExistingCells) {
while ((!$this->_subject->cellExistsByColumnAndRow($this->_columnIndex, $this->_startRow)) &&
($this->_startRow <= $this->_endRow)) {
++$this->_startRow;
}
if ($this->_startRow > $this->_endRow) {
throw new PHPExcel_Exception('No cells exist within the specified range');
}
while ((!$this->_subject->cellExistsByColumnAndRow($this->_columnIndex, $this->_endRow)) &&
($this->_endRow >= $this->_startRow)) {
--$this->_endRow;
}
if ($this->_endRow < $this->_startRow) {
throw new PHPExcel_Exception('No cells exist within the specified range');
}
}
}
}