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php/testing/includes/PHPExcel/Worksheet/ColumnIterator.php

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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;
+	}
+}