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<?php namespace PhpOffice\PhpSpreadsheet\Worksheet; use PhpOffice\PhpSpreadsheet\Cell; use PhpOffice\PhpSpreadsheet\Exception; use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException; use PhpOffice\PhpSpreadsheet\Worksheet; /** * Copyright (c) 2006 - 2016 PhpSpreadsheet. * 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 PhpSpreadsheet * * @copyright Copyright (c) 2006 - 2016 PhpSpreadsheet (https://github.com/PHPOffice/PhpSpreadsheet) * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL / class ColumnIterator implements \Iterator { /* * Worksheet to iterate. * * @var \PhpOffice\PhpSpreadsheet\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 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(Worksheet $subject, $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 int $startColumn The column address at which to start iterating * * @throws Exception * * @return ColumnIterator / public function resetStart($startColumn = 'A') { $startColumnIndex = Cell::columnIndexFromString($startColumn) - 1; if ($startColumnIndex > Cell::columnIndexFromString($this->subject->getHighestColumn()) - 1) { throw new 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 $endColumn The column address at which to stop iterating * * @return ColumnIterator / public function resetEnd($endColumn = null) { $endColumn = ($endColumn) ? $endColumn : $this->subject->getHighestColumn(); $this->endColumn = Cell::columnIndexFromString($endColumn) - 1; return $this; } /* * Set the column pointer to the selected column. * * @param string $column The column address to set the current pointer at * * @throws PhpSpreadsheetException * * @return ColumnIterator / public function seek($column = 'A') { $column = Cell::columnIndexFromString($column) - 1; if (($column < $this->startColumn) \|\| ($column > $this->endColumn)) { throw new PhpSpreadsheetException("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 = $this->startColumn; } /* * Return the current column in this worksheet. * * @return Column / public function current() { return new Column($this->subject, Cell::stringFromColumnIndex($this->position)); } /* * Return the current iterator key. * * @return string / public function key() { return Cell::stringFromColumnIndex($this->position); } /* * Set the iterator to its next value. / public function next() { ++$this->position; } /* * Set the iterator to its previous value. * * @throws PhpSpreadsheetException / public function prev() { if ($this->position <= $this->startColumn) { throw new PhpSpreadsheetException('Column is already at the beginning of range (' . Cell::stringFromColumnIndex($this->endColumn) . ' - ' . Cell::stringFromColumnIndex($this->endColumn) . ')'); } --$this->position; } /* * Indicate if more columns exist in the worksheet range of columns that we're iterating. * * @return bool */ public function valid() { return $this->position <= $this->endColumn; } }

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