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<?php
/**
* PHPExcel_CachedObjectStorage_CacheBase
*
* Copyright (c) 2006 - 2015 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_CachedObjectStorage
* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version ##VERSION##, ##DATE##
*/
abstract class PHPExcel_CachedObjectStorage_CacheBase
{
/**
* Parent worksheet
*
* @var PHPExcel_Worksheet
*/
protected $parent;
/**
* The currently active Cell
*
* @var PHPExcel_Cell
*/
protected $currentObject = null;
/**
* Coordinate address of the currently active Cell
*
* @var string
*/
protected $currentObjectID = null;
/**
* Flag indicating whether the currently active Cell requires saving
*
* @var boolean
*/
protected $currentCellIsDirty = true;
/**
* An array of cells or cell pointers for the worksheet cells held in this cache,
* and indexed by their coordinate address within the worksheet
*
* @var array of mixed
*/
protected $cellCache = array();
/**
* Initialise this new cell collection
*
* @param PHPExcel_Worksheet $parent The worksheet for this cell collection
*/
public function __construct(PHPExcel_Worksheet $parent)
{
// Set our parent worksheet.
// This is maintained within the cache controller to facilitate re-attaching it to PHPExcel_Cell objects when
// they are woken from a serialized state
$this->parent = $parent;
}
/**
* Return the parent worksheet for this cell collection
*
* @return PHPExcel_Worksheet
*/
public function getParent()
{
return $this->parent;
}
/**
* Is a value set in the current PHPExcel_CachedObjectStorage_ICache for an indexed cell?
*
* @param string $pCoord Coordinate address of the cell to check
* @return boolean
*/
public function isDataSet($pCoord)
{
if ($pCoord === $this->currentObjectID) {
return true;
}
// Check if the requested entry exists in the cache
return isset($this->cellCache[$pCoord]);
}
/**
* Move a cell object from one address to another
*
* @param string $fromAddress Current address of the cell to move
* @param string $toAddress Destination address of the cell to move
* @return boolean
*/
public function moveCell($fromAddress, $toAddress)
{
if ($fromAddress === $this->currentObjectID) {
$this->currentObjectID = $toAddress;
}
$this->currentCellIsDirty = true;
if (isset($this->cellCache[$fromAddress])) {
$this->cellCache[$toAddress] = &$this->cellCache[$fromAddress];
unset($this->cellCache[$fromAddress]);
}
return true;
}
/**
* Add or Update a cell in cache
*
* @param PHPExcel_Cell $cell Cell to update
* @return PHPExcel_Cell
* @throws PHPExcel_Exception
*/
public function updateCacheData(PHPExcel_Cell $cell)
{
return $this->addCacheData($cell->getCoordinate(), $cell);
}
/**
* Delete a cell in cache identified by coordinate address
*
* @param string $pCoord Coordinate address of the cell to delete
* @throws PHPExcel_Exception
*/
public function deleteCacheData($pCoord)
{
if ($pCoord === $this->currentObjectID && !is_null($this->currentObject)) {
$this->currentObject->detach();
$this->currentObjectID = $this->currentObject = null;
}
if (is_object($this->cellCache[$pCoord])) {
$this->cellCache[$pCoord]->detach();
unset($this->cellCache[$pCoord]);
}
$this->currentCellIsDirty = false;
}
/**
* Get a list of all cell addresses currently held in cache
*
* @return string[]
*/
public function getCellList()
{
return array_keys($this->cellCache);
}
/**
* Sort the list of all cell addresses currently held in cache by row and column
*
* @return string[]
*/
public function getSortedCellList()
{
$sortKeys = array();
foreach ($this->getCellList() as $coord) {
sscanf($coord, '%[A-Z]%d', $column, $row);
$sortKeys[sprintf('%09d%3s', $row, $column)] = $coord;
}
ksort($sortKeys);
return array_values($sortKeys);
}
/**
* Get highest worksheet column and highest row that have cell records
*
* @return array Highest column name and highest row number
*/
public function getHighestRowAndColumn()
{
// Lookup highest column and highest row
$col = array('A' => '1A');
$row = array(1);
foreach ($this->getCellList() as $coord) {
sscanf($coord, '%[A-Z]%d', $c, $r);
$row[$r] = $r;
$col[$c] = strlen($c).$c;
}
if (!empty($row)) {
// Determine highest column and row
$highestRow = max($row);
$highestColumn = substr(max($col), 1);
}
return array(
'row' => $highestRow,
'column' => $highestColumn
);
}
/**
* Return the cell address of the currently active cell object
*
* @return string
*/
public function getCurrentAddress()
{
return $this->currentObjectID;
}
/**
* Return the column address of the currently active cell object
*
* @return string
*/
public function getCurrentColumn()
{
sscanf($this->currentObjectID, '%[A-Z]%d', $column, $row);
return $column;
}
/**
* Return the row address of the currently active cell object
*
* @return integer
*/
public function getCurrentRow()
{
sscanf($this->currentObjectID, '%[A-Z]%d', $column, $row);
return (integer) $row;
}
/**
* Get highest worksheet column
*
* @param string $row Return the highest column for the specified row,
* or the highest column of any row if no row number is passed
* @return string Highest column name
*/
public function getHighestColumn($row = null)
{
if ($row == null) {
$colRow = $this->getHighestRowAndColumn();
return $colRow['column'];
}
$columnList = array(1);
foreach ($this->getCellList() as $coord) {
sscanf($coord, '%[A-Z]%d', $c, $r);
if ($r != $row) {
continue;
}
$columnList[] = PHPExcel_Cell::columnIndexFromString($c);
}
return PHPExcel_Cell::stringFromColumnIndex(max($columnList) - 1);
}
/**
* Get highest worksheet row
*
* @param string $column Return the highest row for the specified column,
* or the highest row of any column if no column letter is passed
* @return int Highest row number
*/
public function getHighestRow($column = null)
{
if ($column == null) {
$colRow = $this->getHighestRowAndColumn();
return $colRow['row'];
}
$rowList = array(0);
foreach ($this->getCellList() as $coord) {
sscanf($coord, '%[A-Z]%d', $c, $r);
if ($c != $column) {
continue;
}
$rowList[] = $r;
}
return max($rowList);
}
/**
* Generate a unique ID for cache referencing
*
* @return string Unique Reference
*/
protected function getUniqueID()
{
if (function_exists('posix_getpid')) {
$baseUnique = posix_getpid();
} else {
$baseUnique = mt_rand();
}
return uniqid($baseUnique, true);
}
/**
* Clone the cell collection
*
* @param PHPExcel_Worksheet $parent The new worksheet
* @return void
*/
public function copyCellCollection(PHPExcel_Worksheet $parent)
{
$this->currentCellIsDirty;
$this->storeData();
$this->parent = $parent;
if (($this->currentObject !== null) && (is_object($this->currentObject))) {
$this->currentObject->attach($this);
}
} // function copyCellCollection()
/**
* Remove a row, deleting all cells in that row
*
* @param string $row Row number to remove
* @return void
*/
public function removeRow($row)
{
foreach ($this->getCellList() as $coord) {
sscanf($coord, '%[A-Z]%d', $c, $r);
if ($r == $row) {
$this->deleteCacheData($coord);
}
}
}
/**
* Remove a column, deleting all cells in that column
*
* @param string $column Column ID to remove
* @return void
*/
public function removeColumn($column)
{
foreach ($this->getCellList() as $coord) {
sscanf($coord, '%[A-Z]%d', $c, $r);
if ($c == $column) {
$this->deleteCacheData($coord);
}
}
}
/**
* Identify whether the caching method is currently available
* Some methods are dependent on the availability of certain extensions being enabled in the PHP build
*
* @return boolean
*/
public static function cacheMethodIsAvailable()
{
return true;
}
}
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