From ceddc13f8253ec59c7ce0aca872c1eebf1f3b330 Mon Sep 17 00:00:00 2001
From: MarkBaker <mark@lange.demon.co.uk>
Date: Sun, 26 Apr 2015 13:00:58 +0100
Subject: [PATCH] Implement a ColumnIterator, refactoring of RowIterator
 Currently this disables the setIterateOnlyExistingCells option

TODO Re-Implement setIterateOnlyExistingCells logic with the new structure
TODO Rationalise and abstract common methods in the iterator classes
---
 Classes/PHPExcel/Worksheet.php                |  12 +
 Classes/PHPExcel/Worksheet/CellIterator.php   |   2 +-
 Classes/PHPExcel/Worksheet/Column.php         |  90 +++++++
 .../PHPExcel/Worksheet/ColumnCellIterator.php | 215 +++++++++++++++++
 Classes/PHPExcel/Worksheet/ColumnIterator.php | 192 +++++++++++++++
 Classes/PHPExcel/Worksheet/Row.php            |   2 +-
 .../PHPExcel/Worksheet/RowCellIterator.php    | 224 ++++++++++++++++++
 Classes/PHPExcel/Worksheet/RowIterator.php    |   7 +-
 .../PHPExcel/Worksheet/ColumnIteratorTest.php |  89 +++++++
 .../PHPExcel/Worksheet/RowIteratorTest.php    |   6 +-
 .../Worksheet/WorksheetColumnTest.php         |  43 ++++
 .../PHPExcel/Worksheet/WorksheetRowTest.php   |  43 ++++
 unitTests/phpunit.xml                         |   3 +
 13 files changed, 922 insertions(+), 6 deletions(-)
 create mode 100644 Classes/PHPExcel/Worksheet/Column.php
 create mode 100644 Classes/PHPExcel/Worksheet/ColumnCellIterator.php
 create mode 100644 Classes/PHPExcel/Worksheet/ColumnIterator.php
 create mode 100644 Classes/PHPExcel/Worksheet/RowCellIterator.php
 create mode 100644 unitTests/Classes/PHPExcel/Worksheet/ColumnIteratorTest.php
 create mode 100644 unitTests/Classes/PHPExcel/Worksheet/WorksheetColumnTest.php
 create mode 100644 unitTests/Classes/PHPExcel/Worksheet/WorksheetRowTest.php

diff --git a/Classes/PHPExcel/Worksheet.php b/Classes/PHPExcel/Worksheet.php
index bb6a22f..2b0b57a 100644
--- a/Classes/PHPExcel/Worksheet.php
+++ b/Classes/PHPExcel/Worksheet.php
@@ -2568,6 +2568,18 @@ class PHPExcel_Worksheet implements PHPExcel_IComparable
         return new PHPExcel_Worksheet_RowIterator($this, $startRow, $endRow);
     }
 
+    /**
+     * Get column iterator
+     *
+     * @param   string   $startColumn The column address at which to start iterating
+     * @param   string   $endColumn   The column address at which to stop iterating
+     *
+     * @return PHPExcel_Worksheet_ColumnIterator
+     */
+	public function getColumnIterator($startColumn = 'A', $endColumn = null) {
+        return new PHPExcel_Worksheet_ColumnIterator($this, $startColumn, $endColumn);
+    }
+
     /**
      * Run PHPExcel garabage collector.
      *
diff --git a/Classes/PHPExcel/Worksheet/CellIterator.php b/Classes/PHPExcel/Worksheet/CellIterator.php
index 27cdc94..4b96816 100644
--- a/Classes/PHPExcel/Worksheet/CellIterator.php
+++ b/Classes/PHPExcel/Worksheet/CellIterator.php
@@ -22,7 +22,7 @@
  * @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##
+ * @version    1.8.0, 2014-03-02
  */
 
 
diff --git a/Classes/PHPExcel/Worksheet/Column.php b/Classes/PHPExcel/Worksheet/Column.php
new file mode 100644
index 0000000..a251f39
--- /dev/null
+++ b/Classes/PHPExcel/Worksheet/Column.php
@@ -0,0 +1,90 @@
+<?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_Column
+ *
+ * Represents a column in PHPExcel_Worksheet, used by PHPExcel_Worksheet_ColumnIterator
+ *
+ * @category   PHPExcel
+ * @package    PHPExcel_Worksheet
+ * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
+ */
+class PHPExcel_Worksheet_Column
+{
+	/**
+	 * PHPExcel_Worksheet
+	 *
+	 * @var PHPExcel_Worksheet
+	 */
+	private $_parent;
+
+	/**
+	 * Column index
+	 *
+	 * @var string
+	 */
+	private $_columnIndex;
+
+	/**
+	 * Create a new column
+	 *
+	 * @param PHPExcel_Worksheet 	$parent
+	 * @param string				$columnIndex
+	 */
+	public function __construct(PHPExcel_Worksheet $parent = null, $columnIndex = 'A') {
+		// Set parent and column index
+		$this->_parent 		= $parent;
+		$this->_columnIndex = $columnIndex;
+	}
+
+	/**
+	 * Destructor
+	 */
+	public function __destruct() {
+		unset($this->_parent);
+	}
+
+	/**
+	 * Get column index
+	 *
+	 * @return int
+	 */
+	public function getColumnIndex() {
+		return $this->_columnIndex;
+	}
+
+	/**
+	 * Get cell iterator
+	 *
+	 * @return PHPExcel_Worksheet_CellIterator
+	 */
+	public function getCellIterator() {
+		return new PHPExcel_Worksheet_ColumnCellIterator($this->_parent, $this->_columnIndex);
+	}
+}
diff --git a/Classes/PHPExcel/Worksheet/ColumnCellIterator.php b/Classes/PHPExcel/Worksheet/ColumnCellIterator.php
new file mode 100644
index 0000000..ac4c87a
--- /dev/null
+++ b/Classes/PHPExcel/Worksheet/ColumnCellIterator.php
@@ -0,0 +1,215 @@
+<?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_ColumnCellIterator
+ *
+ * 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_ColumnCellIterator implements Iterator
+{
+	/**
+	 * PHPExcel_Worksheet to iterate
+	 *
+	 * @var PHPExcel_Worksheet
+	 */
+	private $_subject;
+
+	/**
+	 * Column index
+	 *
+	 * @var string
+	 */
+	private $_columnIndex;
+
+	/**
+	 * Current iterator position
+	 *
+	 * @var int
+	 */
+	private $_position = 1;
+
+	/**
+	 * Start position
+	 *
+	 * @var int
+	 */
+	private $_startRow = 1;
+
+	/**
+	 * End position
+	 *
+	 * @var int
+	 */
+	private $_endRow = 1;
+
+	/**
+	 * Loop only existing cells
+	 *
+	 * @var boolean
+	 */
+	private $_onlyExistingCells = true;
+
+	/**
+	 * Create a new row iterator
+	 *
+	 * @param	PHPExcel_Worksheet	$subject	    The worksheet to iterate over
+     * @param   string              $columnIndex    The column that we want to iterate
+	 * @param	integer				$startRow	    The row number at which to start iterating
+	 * @param	integer				$endRow	        Optionally, the row number at which to stop iterating
+	 */
+	public function __construct(PHPExcel_Worksheet $subject = null, $columnIndex, $startRow = 1, $endRow = null) {
+		// Set subject
+		$this->_subject = $subject;
+		$this->_columnIndex = PHPExcel_Cell::columnIndexFromString($columnIndex) - 1;
+		$this->resetEnd($endRow);
+		$this->resetStart($startRow);
+	}
+
+	/**
+	 * Destructor
+	 */
+	public function __destruct() {
+		unset($this->_subject);
+	}
+
+	/**
+	 * (Re)Set the start row and the current row pointer
+	 *
+	 * @param integer	$startRow	The row number at which to start iterating
+     * @return PHPExcel_Worksheet_RowIterator
+	 */
+	public function resetStart($startRow = 1) {
+		$this->_startRow = $startRow;
+		$this->seek($startRow);
+
+        return $this;
+	}
+
+	/**
+	 * (Re)Set the end row
+	 *
+	 * @param integer	$endRow	The row number at which to stop iterating
+     * @return PHPExcel_Worksheet_RowIterator
+	 */
+	public function resetEnd($endRow = null) {
+		$this->_endRow = ($endRow) ? $endRow : $this->_subject->getHighestRow();
+
+        return $this;
+	}
+
+	/**
+	 * Set the row pointer to the selected row
+	 *
+	 * @param integer	$row	The row number to set the current pointer at
+     * @return PHPExcel_Worksheet_RowIterator
+     * @throws PHPExcel_Exception
+	 */
+	public function seek($row = 1) {
+        if (($row < $this->_startRow) || ($row > $this->_endRow)) {
+            throw new PHPExcel_Exception("Row $row is out of range ({$this->_startRow} - {$this->_endRow})");
+        }
+		$this->_position = $row;
+
+        return $this;
+	}
+
+	/**
+	 * Rewind the iterator to the starting row
+	 */
+	public function rewind() {
+		$this->_position = $this->_startRow;
+	}
+
+	/**
+	 * Return the current row in this worksheet
+	 *
+	 * @return PHPExcel_Worksheet_Row
+	 */
+	public function current() {
+		return $this->_subject->getCellByColumnAndRow($this->_columnIndex, $this->_position);
+	}
+
+	/**
+	 * Return the current iterator key
+	 *
+	 * @return int
+	 */
+	public function key() {
+		return $this->_position;
+	}
+
+	/**
+	 * Set the iterator to its next value
+	 */
+	public function next() {
+		++$this->_position;
+	}
+
+	/**
+	 * Set the iterator to its previous value
+	 */
+	public function prev() {
+        if ($this->_position <= $this->_startRow) {
+            throw new PHPExcel_Exception("Row is already at the beginning of range ({$this->_startRow} - {$this->_endRow})");
+        }
+
+        --$this->_position;
+	}
+
+	/**
+	 * Indicate if more rows exist in the worksheet range of rows that we're iterating
+	 *
+	 * @return boolean
+	 */
+	public function valid() {
+		return $this->_position <= $this->_endRow;
+	}
+
+	/**
+	 * Get loop only existing cells
+	 *
+	 * @return boolean
+	 */
+    public function getIterateOnlyExistingCells() {
+    	return $this->_onlyExistingCells;
+    }
+
+	/**
+	 * Set the iterator to loop only existing cells
+	 *
+	 * @param	boolean		$value
+	 */
+    public function setIterateOnlyExistingCells($value = true) {
+    	$this->_onlyExistingCells = $value;
+    }
+}
diff --git a/Classes/PHPExcel/Worksheet/ColumnIterator.php b/Classes/PHPExcel/Worksheet/ColumnIterator.php
new file mode 100644
index 0000000..3030b3f
--- /dev/null
+++ b/Classes/PHPExcel/Worksheet/ColumnIterator.php
@@ -0,0 +1,192 @@
+<?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 <= $this->_endColumn;
+	}
+}
diff --git a/Classes/PHPExcel/Worksheet/Row.php b/Classes/PHPExcel/Worksheet/Row.php
index df16d33..32b63ce 100644
--- a/Classes/PHPExcel/Worksheet/Row.php
+++ b/Classes/PHPExcel/Worksheet/Row.php
@@ -85,6 +85,6 @@ class PHPExcel_Worksheet_Row
 	 * @return PHPExcel_Worksheet_CellIterator
 	 */
 	public function getCellIterator() {
-		return new PHPExcel_Worksheet_CellIterator($this->_parent, $this->_rowIndex);
+		return new PHPExcel_Worksheet_RowCellIterator($this->_parent, $this->_rowIndex);
 	}
 }
diff --git a/Classes/PHPExcel/Worksheet/RowCellIterator.php b/Classes/PHPExcel/Worksheet/RowCellIterator.php
new file mode 100644
index 0000000..048ca9d
--- /dev/null
+++ b/Classes/PHPExcel/Worksheet/RowCellIterator.php
@@ -0,0 +1,224 @@
+<?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_RowCellIterator
+ *
+ * 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_RowCellIterator implements Iterator
+{
+	/**
+	 * PHPExcel_Worksheet to iterate in
+	 *
+	 * @var PHPExcel_Worksheet
+	 */
+	private $_subject;
+
+	/**
+	 * Row index
+	 *
+	 * @var int
+	 */
+	private $_rowIndex;
+
+	/**
+	 * Current iterator position
+	 *
+	 * @var int
+	 */
+	private $_position = 0;
+
+	/**
+	 * Start position
+	 *
+	 * @var int
+	 */
+	private $_startColumn = 0;
+
+	/**
+	 * End position
+	 *
+	 * @var int
+	 */
+	private $_endColumn = 0;
+
+	/**
+	 * Loop only existing cells
+	 *
+	 * @var boolean
+	 */
+	private $_onlyExistingCells = true;
+
+	/**
+	 * Create a new column iterator
+	 *
+	 * @param	PHPExcel_Worksheet	$subject	    The worksheet to iterate over
+     * @param   integer             $rowIndex       The row that we want to iterate
+	 * @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, $rowIndex = 1, $startColumn = 'A', $endColumn = null) {
+		// Set subject and row index
+		$this->_subject = $subject;
+		$this->_rowIndex = $rowIndex;
+		$this->resetEnd($endColumn);
+		$this->resetStart($startColumn);
+	}
+
+	/**
+	 * Destructor
+	 */
+	public function __destruct() {
+		unset($this->_subject);
+	}
+
+	/**
+	 * (Re)Set the start column and the current column pointer
+	 *
+	 * @param integer	$startColumn	The column address at which to start iterating
+     * @return PHPExcel_Worksheet_RowCellIterator
+	 */
+	public function resetStart($startColumn = 'A') {
+        $startColumnIndex = PHPExcel_Cell::columnIndexFromString($startColumn) - 1;
+		$this->_startColumn = $startColumnIndex;
+		$this->seek($startColumn);
+
+        return $this;
+	}
+
+	/**
+	 * (Re)Set the end column
+	 *
+	 * @param string	$endColumn	The column address at which to stop iterating
+     * @return PHPExcel_Worksheet_RowCellIterator
+	 */
+	public function resetEnd($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	$column	The column address to set the current pointer at
+     * @return PHPExcel_Worksheet_RowCellIterator
+     * @throws PHPExcel_Exception
+	 */
+	public function seek($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 cell in this worksheet row
+	 *
+	 * @return PHPExcel_Cell
+	 */
+	public function current() {
+		return $this->_subject->getCellByColumnAndRow($this->_position, $this->_rowIndex);
+	}
+
+	/**
+	 * Return the current iterator key
+	 *
+	 * @return string
+	 */
+	public function key() {
+		return PHPExcel_Cell::stringFromColumnIndex($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;
+	}
+
+	/**
+	 * Get loop only existing cells
+	 *
+	 * @return boolean
+	 */
+    public function getIterateOnlyExistingCells() {
+    	return $this->_onlyExistingCells;
+    }
+
+	/**
+	 * Set the iterator to loop only existing cells
+	 *
+	 * @param	boolean		$value
+	 */
+    public function setIterateOnlyExistingCells($value = true) {
+    	$this->_onlyExistingCells = $value;
+    }
+}
diff --git a/Classes/PHPExcel/Worksheet/RowIterator.php b/Classes/PHPExcel/Worksheet/RowIterator.php
index 295ed60..110d862 100644
--- a/Classes/PHPExcel/Worksheet/RowIterator.php
+++ b/Classes/PHPExcel/Worksheet/RowIterator.php
@@ -92,6 +92,7 @@ class PHPExcel_Worksheet_RowIterator implements Iterator
 	 * (Re)Set the start row and the current row pointer
 	 *
 	 * @param integer	$startRow	The row number at which to start iterating
+     * @return PHPExcel_Worksheet_RowIterator
 	 */
 	public function resetStart($startRow = 1) {
 		$this->_startRow = $startRow;
@@ -104,6 +105,7 @@ class PHPExcel_Worksheet_RowIterator implements Iterator
 	 * (Re)Set the end row
 	 *
 	 * @param integer	$endRow	The row number at which to stop iterating
+     * @return PHPExcel_Worksheet_RowIterator
 	 */
 	public function resetEnd($endRow = null) {
 		$this->_endRow = ($endRow) ? $endRow : $this->_subject->getHighestRow();
@@ -115,13 +117,16 @@ class PHPExcel_Worksheet_RowIterator implements Iterator
 	 * Set the row pointer to the selected row
 	 *
 	 * @param integer	$row	The row number to set the current pointer at
+     * @return PHPExcel_Worksheet_RowIterator
+     * @throws PHPExcel_Exception
 	 */
 	public function seek($row = 1) {
         if (($row < $this->_startRow) || ($row > $this->_endRow)) {
             throw new PHPExcel_Exception("Row $row is out of range ({$this->_startRow} - {$this->_endRow})");
         }
-
 		$this->_position = $row;
+
+        return $this;
 	}
 
 	/**
diff --git a/unitTests/Classes/PHPExcel/Worksheet/ColumnIteratorTest.php b/unitTests/Classes/PHPExcel/Worksheet/ColumnIteratorTest.php
new file mode 100644
index 0000000..4129b85
--- /dev/null
+++ b/unitTests/Classes/PHPExcel/Worksheet/ColumnIteratorTest.php
@@ -0,0 +1,89 @@
+<?php
+
+class ColumnIteratorTest extends PHPUnit_Framework_TestCase
+{
+    public $mockWorksheet;
+    public $mockColumn;
+
+	public function setUp()
+	{
+		if (!defined('PHPEXCEL_ROOT')) {
+			define('PHPEXCEL_ROOT', APPLICATION_PATH . '/');
+		}
+		require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
+        
+        $this->mockColumn = $this->getMockBuilder('PHPExcel_Worksheet_Column')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->mockWorksheet = $this->getMockBuilder('PHPExcel_Worksheet')
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->mockWorksheet->expects($this->any())
+                 ->method('getHighestColumn')
+                 ->will($this->returnValue('E'));
+        $this->mockWorksheet->expects($this->any())
+                 ->method('current')
+                 ->will($this->returnValue($this->mockColumn));
+    }
+
+
+	public function testIteratorFullRange()
+	{
+        $iterator = new PHPExcel_Worksheet_ColumnIterator($this->mockWorksheet);
+        $columnIndexResult = 'A';
+        $this->assertEquals($columnIndexResult, $iterator->key());
+        
+        foreach($iterator as $key => $column) {
+            $this->assertEquals($columnIndexResult++, $key);
+            $this->assertInstanceOf('PHPExcel_Worksheet_Column', $column);
+        }
+	}
+
+	public function testIteratorStartEndRange()
+	{
+        $iterator = new PHPExcel_Worksheet_ColumnIterator($this->mockWorksheet, 'B', 'D');
+        $columnIndexResult = 'B';
+        $this->assertEquals($columnIndexResult, $iterator->key());
+        
+        foreach($iterator as $key => $column) {
+            $this->assertEquals($columnIndexResult++, $key);
+            $this->assertInstanceOf('PHPExcel_Worksheet_Column', $column);
+        }
+	}
+
+	public function testIteratorSeekAndPrev()
+	{
+        $ranges = range('A','E');
+        $iterator = new PHPExcel_Worksheet_ColumnIterator($this->mockWorksheet, 'B', 'D');
+        $columnIndexResult = 'D';
+        $iterator->seek('D');
+        $this->assertEquals($columnIndexResult, $iterator->key());
+
+        for($i = 1; $i < array_search($columnIndexResult, $ranges); $i++) {
+            $iterator->prev();
+            $expectedResult = $ranges[array_search($columnIndexResult, $ranges) - $i];
+            $this->assertEquals($expectedResult, $iterator->key());
+        }
+	}
+
+    /**
+     * @expectedException PHPExcel_Exception
+     */
+    public function testSeekOutOfRange()
+    {
+        $iterator = new PHPExcel_Worksheet_ColumnIterator($this->mockWorksheet, 'B', 'D');
+        $iterator->seek(1);
+    }
+
+    /**
+     * @expectedException PHPExcel_Exception
+     */
+    public function testPrevOutOfRange()
+    {
+        $iterator = new PHPExcel_Worksheet_ColumnIterator($this->mockWorksheet, 'B', 'D');
+        $iterator->prev();
+    }
+
+}
diff --git a/unitTests/Classes/PHPExcel/Worksheet/RowIteratorTest.php b/unitTests/Classes/PHPExcel/Worksheet/RowIteratorTest.php
index f39f33d..48d8b6b 100644
--- a/unitTests/Classes/PHPExcel/Worksheet/RowIteratorTest.php
+++ b/unitTests/Classes/PHPExcel/Worksheet/RowIteratorTest.php
@@ -55,12 +55,12 @@ class RowIteratorTest extends PHPUnit_Framework_TestCase
 
 	public function testIteratorSeekAndPrev()
 	{
-        $iterator = new PHPExcel_Worksheet_RowIterator($this->mockWorksheet);
+        $iterator = new PHPExcel_Worksheet_RowIterator($this->mockWorksheet, 2, 4);
         $columnIndexResult = 4;
         $iterator->seek(4);
-        $this->assertEquals($columnIndexResult, $iterator->key(), 2, 4);
+        $this->assertEquals($columnIndexResult, $iterator->key());
 
-        for($i = 1; $i < $columnIndexResult; $i++) {
+        for($i = 1; $i < $columnIndexResult-1; $i++) {
             $iterator->prev();
             $this->assertEquals($columnIndexResult - $i, $iterator->key());
         }
diff --git a/unitTests/Classes/PHPExcel/Worksheet/WorksheetColumnTest.php b/unitTests/Classes/PHPExcel/Worksheet/WorksheetColumnTest.php
new file mode 100644
index 0000000..a867bd7
--- /dev/null
+++ b/unitTests/Classes/PHPExcel/Worksheet/WorksheetColumnTest.php
@@ -0,0 +1,43 @@
+<?php
+
+class ColumnTest extends PHPUnit_Framework_TestCase
+{
+    public $mockWorksheet;
+    public $mockColumn;
+
+	public function setUp()
+	{
+		if (!defined('PHPEXCEL_ROOT')) {
+			define('PHPEXCEL_ROOT', APPLICATION_PATH . '/');
+		}
+		require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
+        
+        $this->mockWorksheet = $this->getMockBuilder('PHPExcel_Worksheet')
+            ->disableOriginalConstructor()
+            ->getMock();
+    }
+
+
+	public function testInstantiateColumnDefault()
+	{
+        $column = new PHPExcel_Worksheet_Column($this->mockWorksheet);
+        $this->assertInstanceOf('PHPExcel_Worksheet_Column', $column);
+        $columnIndex = $column->getColumnIndex();
+        $this->assertEquals('A', $columnIndex);
+	}
+
+	public function testInstantiateColumnSpecified()
+	{
+        $column = new PHPExcel_Worksheet_Column($this->mockWorksheet, 'E');
+        $this->assertInstanceOf('PHPExcel_Worksheet_Column', $column);
+        $columnIndex = $column->getColumnIndex();
+        $this->assertEquals('E', $columnIndex);
+	}
+
+	public function testGetCellIterator()
+	{
+        $column = new PHPExcel_Worksheet_Column($this->mockWorksheet);
+        $cellIterator = $column->getCellIterator();
+        $this->assertInstanceOf('PHPExcel_Worksheet_CellIterator', $cellIterator);
+	}
+}
diff --git a/unitTests/Classes/PHPExcel/Worksheet/WorksheetRowTest.php b/unitTests/Classes/PHPExcel/Worksheet/WorksheetRowTest.php
new file mode 100644
index 0000000..dd80e0d
--- /dev/null
+++ b/unitTests/Classes/PHPExcel/Worksheet/WorksheetRowTest.php
@@ -0,0 +1,43 @@
+<?php
+
+class WorksheetRowTest extends PHPUnit_Framework_TestCase
+{
+    public $mockWorksheet;
+    public $mockRow;
+
+	public function setUp()
+	{
+		if (!defined('PHPEXCEL_ROOT')) {
+			define('PHPEXCEL_ROOT', APPLICATION_PATH . '/');
+		}
+		require_once(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
+        
+        $this->mockWorksheet = $this->getMockBuilder('PHPExcel_Worksheet')
+            ->disableOriginalConstructor()
+            ->getMock();
+    }
+
+
+	public function testInstantiateRowDefault()
+	{
+        $row = new PHPExcel_Worksheet_Row($this->mockWorksheet);
+        $this->assertInstanceOf('PHPExcel_Worksheet_Row', $row);
+        $rowIndex = $row->getRowIndex();
+        $this->assertEquals(1, $rowIndex);
+	}
+
+	public function testInstantiateRowSpecified()
+	{
+        $row = new PHPExcel_Worksheet_Row($this->mockWorksheet, 5);
+        $this->assertInstanceOf('PHPExcel_Worksheet_Row', $row);
+        $rowIndex = $row->getRowIndex();
+        $this->assertEquals(5, $rowIndex);
+	}
+
+	public function testGetCellIterator()
+	{
+        $row = new PHPExcel_Worksheet_Row($this->mockWorksheet);
+        $cellIterator = $row->getCellIterator();
+        $this->assertInstanceOf('PHPExcel_Worksheet_CellIterator', $cellIterator);
+	}
+}
diff --git a/unitTests/phpunit.xml b/unitTests/phpunit.xml
index d18d146..d024c28 100644
--- a/unitTests/phpunit.xml
+++ b/unitTests/phpunit.xml
@@ -13,6 +13,9 @@
     stopOnFailure="false"
     stopOnIncomplete="false"
     stopOnSkipped="false">
+    <php>
+        <ini name="memory_limit" value="2048M"/>
+    </php>
     <testsuite name="PHPExcel Unit Test Suite">
         <directory suffix="Test.php">./Classes</directory>
     </testsuite>