ColumnIterator.php in Loft Data Grids 6.2

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vendor/phpoffice/phpexcel/Classes/PHPExcel/Worksheet/ColumnIterator.php

<?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;
  }

}

Classes

Name	Description
PHPExcel_Worksheet_ColumnIterator	PHPExcel_Worksheet_ColumnIterator