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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_ColumnIterator
*
* 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_ColumnIterator implements Iterator
{
/**
* PHPExcel_Worksheet to iterate
*
* @var PHPExcel_Worksheet
*/
private $_subject;
/**
* Current iterator position
*
* @var int
*/
private $_position = 0;
/**
* Start position
*
* @var int
*/
private $_startColumn = 0;
/**
* End position
*
* @var int
*/
private $_endColumn = 0;
/**
* Create a new column iterator
*
* @param PHPExcel_Worksheet $subject The worksheet to iterate over
* @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(PHPExcel_Worksheet $subject = null, $startColumn = 'A', $endColumn = null) {
// Set subject
$this->_subject = $subject;
$this->resetEnd($endColumn);
$this->resetStart($startColumn);
}
/**
* Destructor
*/
public function __destruct() {
unset($this->_subject);
}
/**
* (Re)Set the start column and the current column pointer
*
* @param integer $startColumn The column address at which to start iterating
* @return PHPExcel_Worksheet_ColumnIterator
*/
public function resetStart($startColumn = 'A') {
$startColumnIndex = PHPExcel_Cell::columnIndexFromString($startColumn) - 1;
$this->_startColumn = $startColumnIndex;
$this->seek($startColumn);
return $this;
}
/**
* (Re)Set the end column
*
* @param string $endColumn The column address at which to stop iterating
* @return PHPExcel_Worksheet_ColumnIterator
*/
public function resetEnd($endColumn = null) {
$endColumn = ($endColumn) ? $endColumn : $this->_subject->getHighestColumn();
$this->_endColumn = PHPExcel_Cell::columnIndexFromString($endColumn) - 1;
return $this;
}
/**
* Set the column pointer to the selected column
*
* @param string $column The column address to set the current pointer at
* @return PHPExcel_Worksheet_ColumnIterator
* @throws PHPExcel_Exception
*/
public function seek($column = 'A') {
$column = PHPExcel_Cell::columnIndexFromString($column) - 1;
if (($column < $this->_startColumn) || ($column > $this->_endColumn)) {
throw new PHPExcel_Exception("Column $column is out of range ({$this->_startColumn} - {$this->_endColumn})");
}
$this->_position = $column;
return $this;
}
/**
* Rewind the iterator to the starting column
*/
public function rewind() {
$this->_position = $this->_startColumn;
}
/**
* Return the current column in this worksheet
*
* @return PHPExcel_Worksheet_Column
*/
public function current() {
return new PHPExcel_Worksheet_Column($this->_subject, PHPExcel_Cell::stringFromColumnIndex($this->_position));
}
/**
* Return the current iterator key
*
* @return string
*/
public function key() {
return PHPExcel_Cell::stringFromColumnIndex($this->_position);
}
/**
* Set the iterator to its next value
*/
public function next() {
++$this->_position;
}
/**
* Set the iterator to its previous value
*
* @throws PHPExcel_Exception
*/
public function prev() {
if ($this->_position <= $this->_startColumn) {
throw new PHPExcel_Exception(
"Column is already at the beginning of range (" .
PHPExcel_Cell::stringFromColumnIndex($this->_endColumn) . " - " .
PHPExcel_Cell::stringFromColumnIndex($this->_endColumn) . ")"
);
}
--$this->_position;
}
/**
* Indicate if more columns exist in the worksheet range of columns that we're iterating
*
* @return boolean
*/
public function valid() {
return $this->_position <= $this->_endColumn;
}
}
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