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<?php /** * PHPExcel_Worksheet_ColumnIterator * * Copyright (c) 2006 - 2015 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 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel) * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL * @version ##VERSION##, ##DATE## */ 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 $startColumn The column address at which to start iterating * @return PHPExcel_Worksheet_ColumnIterator * @throws PHPExcel_Exception */ public function resetStart($startColumn = 'A') { $startColumnIndex = PHPExcel_Cell::columnIndexFromString($startColumn) - 1; if ($startColumnIndex > PHPExcel_Cell::columnIndexFromString($this->subject->getHighestColumn()) - 1) { throw new PHPExcel_Exception("Start column ({$startColumn}) is beyond highest column ({$this->subject->getHighestColumn()})"); } $this->startColumn = $startColumnIndex; if ($this->endColumn < $this->startColumn) { $this->endColumn = $this->startColumn; } $this->seek($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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