From ef2de9cc5e80dd9943fd9408fbd4860bb02b3232 Mon Sep 17 00:00:00 2001
From: Mark Baker <mark@lange.demon.co.uk>
Date: Tue, 21 Aug 2012 22:32:16 +0100
Subject: [PATCH] Github Issue #32 - Insert column VS autofilter

---
 Classes/PHPExcel/ReferenceHelper.php      | 57 ++++++++++++++++++++++-
 Classes/PHPExcel/Worksheet/AutoFilter.php | 45 +++++++++++++++++-
 2 files changed, 99 insertions(+), 3 deletions(-)

diff --git a/Classes/PHPExcel/ReferenceHelper.php b/Classes/PHPExcel/ReferenceHelper.php
index c7b9e65..4110851 100644
--- a/Classes/PHPExcel/ReferenceHelper.php
+++ b/Classes/PHPExcel/ReferenceHelper.php
@@ -312,8 +312,61 @@ class PHPExcel_ReferenceHelper
 
 
 		// Update worksheet: autofilter
-		if ($pSheet->getAutoFilter()->getRange() !== '') {
-			$pSheet->setAutoFilter( $this->updateCellReference($pSheet->getAutoFilter()->getRange(), $pBefore, $pNumCols, $pNumRows) );
+		$autoFilter = $pSheet->getAutoFilter();
+		$autoFilterRange = $autoFilter->getRange();
+		if (!empty($autoFilterRange)) {
+			if ($pNumCols != 0) {
+				$autoFilterColumns = array_keys($autoFilter->getColumns());
+				if (count($autoFilterColumns) > 0) {
+					list($column,$row) = sscanf($pBefore,'%[A-Z]%d');
+					$columnIndex = PHPExcel_Cell::columnIndexFromString($column);
+					list($rangeStart,$rangeEnd) = PHPExcel_Cell::rangeBoundaries($autoFilterRange);
+					if ($columnIndex <= $rangeEnd[0]) {
+						if ($pNumCols < 0) {
+							//	If we're actually deleting any columns that fall within the autofilter range,
+							//		then we delete any rules for those columns
+							$deleteColumn = $columnIndex + $pNumCols - 1;
+							$deleteCount = abs($pNumCols);
+							for ($i = 1; $i <= $deleteCount; ++$i) {
+								if (in_array(PHPExcel_Cell::stringFromColumnIndex($deleteColumn),$autoFilterColumns)) {
+									$autoFilter->clearColumn(PHPExcel_Cell::stringFromColumnIndex($deleteColumn));
+								}
+								++$deleteColumn;
+							}
+						}
+						$startCol = ($columnIndex > $rangeStart[0]) ? $columnIndex : $rangeStart[0];
+
+						//	Shuffle columns in autofilter range
+						if ($pNumCols > 0) {
+							//	For insert, we shuffle from end to beginning to avoid overwriting
+							$startColID = PHPExcel_Cell::stringFromColumnIndex($startCol-1);
+							$toColID = PHPExcel_Cell::stringFromColumnIndex($startCol+$pNumCols-1);
+							$endColID = PHPExcel_Cell::stringFromColumnIndex($rangeEnd[0]);
+
+							$startColRef = $startCol;
+							$endColRef = $rangeEnd[0];
+							$toColRef = $rangeEnd[0]+$pNumCols;
+
+							do {
+								$autoFilter->shiftColumn(PHPExcel_Cell::stringFromColumnIndex($endColRef-1),PHPExcel_Cell::stringFromColumnIndex($toColRef-1));
+								--$endColRef;
+								--$toColRef;
+							} while ($startColRef <= $endColRef);
+						} else {
+							//	For delete, we shuffle from beginning to end to avoid overwriting
+							$startColID = PHPExcel_Cell::stringFromColumnIndex($startCol-1);
+							$toColID = PHPExcel_Cell::stringFromColumnIndex($startCol+$pNumCols-1);
+							$endColID = PHPExcel_Cell::stringFromColumnIndex($rangeEnd[0]);
+							do {
+								$autoFilter->shiftColumn($startColID,$toColID);
+								++$startColID;
+								++$toColID;
+							} while ($startColID != $endColID);
+						}
+					}
+				}
+			}
+			$pSheet->setAutoFilter( $this->updateCellReference($autoFilterRange, $pBefore, $pNumCols, $pNumRows) );
 		}
 
 
diff --git a/Classes/PHPExcel/Worksheet/AutoFilter.php b/Classes/PHPExcel/Worksheet/AutoFilter.php
index 07e79b8..56c0ac7 100644
--- a/Classes/PHPExcel/Worksheet/AutoFilter.php
+++ b/Classes/PHPExcel/Worksheet/AutoFilter.php
@@ -150,7 +150,7 @@ class PHPExcel_Worksheet_AutoFilter
 	/**
 	 * Validate that the specified column is in the AutoFilter range
 	 *
-	 * @param	string	$column		Column name (e.g. A)
+	 * @param	string	$column			Column name (e.g. A)
 	 * @throws	PHPExcel_Exception
 	 * @return	integer	The column offset within the autofilter range
 	 */
@@ -239,6 +239,49 @@ class PHPExcel_Worksheet_AutoFilter
 		return $this;
 	}
 
+	/**
+	 * Clear a specified AutoFilter Column
+	 *
+	 * @param	string	$pColumn		Column name (e.g. A)
+	 * @throws	PHPExcel_Exception
+	 * @return PHPExcel_Worksheet_AutoFilter
+	 */
+	public function clearColumn($pColumn) {
+		$this->testColumnInRange($pColumn);
+
+		if (isset($this->_columns[$pColumn])) {
+			unset($this->_columns[$pColumn]);
+		}
+
+		return $this;
+	}
+
+	/**
+	 *	Shift an AutoFilter Column Rule to a different column
+	 *
+	 *	Note: This method bypasses validation of the destination column to ensure it is within this AutoFilter range.
+	 *		Nor does it verify whether any column rule already exists at $toColumn, but will simply overrideany existing value.
+	 *		Use with caution.
+	 *
+	 *	@param	string	$fromColumn		Column name (e.g. A)
+	 *	@param	string	$toColumn		Column name (e.g. B)
+	 *	@return PHPExcel_Worksheet_AutoFilter
+	 */
+	public function shiftColumn($fromColumn=NULL,$toColumn=NULL) {
+		$fromColumn = strtoupper($fromColumn);
+		$toColumn = strtoupper($toColumn);
+
+		if (($fromColumn !== NULL) && (isset($this->_columns[$fromColumn])) && ($toColumn !== NULL)) {
+			$this->_columns[$fromColumn]->setParent();
+			$this->_columns[$fromColumn]->setColumnIndex($toColumn);
+			$this->_columns[$toColumn] = $this->_columns[$fromColumn];
+			$this->_columns[$toColumn]->setParent($this);
+			unset($this->_columns[$fromColumn]);
+		}
+
+		return $this;
+	}
+
 
 	/**
 	 *	Test if cell value is in the defined set of values