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368 lines
10 KiB
368 lines
10 KiB
<?php
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/**
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* PHPExcel_CachedObjectStorage_CacheBase
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*
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* Copyright (c) 2006 - 2015 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel_CachedObjectStorage
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* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version ##VERSION##, ##DATE##
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*/
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abstract class PHPExcel_CachedObjectStorage_CacheBase
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{
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/**
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* Parent worksheet
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*
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* @var PHPExcel_Worksheet
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*/
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protected $parent;
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/**
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* The currently active Cell
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*
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* @var PHPExcel_Cell
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*/
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protected $currentObject = null;
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/**
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* Coordinate address of the currently active Cell
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*
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* @var string
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*/
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protected $currentObjectID = null;
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/**
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* Flag indicating whether the currently active Cell requires saving
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*
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* @var boolean
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*/
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protected $currentCellIsDirty = true;
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/**
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* An array of cells or cell pointers for the worksheet cells held in this cache,
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* and indexed by their coordinate address within the worksheet
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*
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* @var array of mixed
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*/
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protected $cellCache = array();
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/**
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* Initialise this new cell collection
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*
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* @param PHPExcel_Worksheet $parent The worksheet for this cell collection
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*/
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public function __construct(PHPExcel_Worksheet $parent)
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{
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// Set our parent worksheet.
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// This is maintained within the cache controller to facilitate re-attaching it to PHPExcel_Cell objects when
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// they are woken from a serialized state
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$this->parent = $parent;
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}
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/**
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* Return the parent worksheet for this cell collection
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*
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* @return PHPExcel_Worksheet
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*/
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public function getParent()
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{
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return $this->parent;
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}
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/**
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* Is a value set in the current PHPExcel_CachedObjectStorage_ICache for an indexed cell?
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*
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* @param string $pCoord Coordinate address of the cell to check
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* @return boolean
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*/
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public function isDataSet($pCoord)
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{
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if ($pCoord === $this->currentObjectID) {
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return true;
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}
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// Check if the requested entry exists in the cache
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return isset($this->cellCache[$pCoord]);
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}
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/**
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* Move a cell object from one address to another
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*
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* @param string $fromAddress Current address of the cell to move
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* @param string $toAddress Destination address of the cell to move
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* @return boolean
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*/
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public function moveCell($fromAddress, $toAddress)
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{
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if ($fromAddress === $this->currentObjectID) {
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$this->currentObjectID = $toAddress;
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}
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$this->currentCellIsDirty = true;
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if (isset($this->cellCache[$fromAddress])) {
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$this->cellCache[$toAddress] = &$this->cellCache[$fromAddress];
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unset($this->cellCache[$fromAddress]);
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}
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return true;
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}
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/**
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* Add or Update a cell in cache
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*
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* @param PHPExcel_Cell $cell Cell to update
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* @return PHPExcel_Cell
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* @throws PHPExcel_Exception
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*/
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public function updateCacheData(PHPExcel_Cell $cell)
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{
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return $this->addCacheData($cell->getCoordinate(), $cell);
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}
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/**
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* Delete a cell in cache identified by coordinate address
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*
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* @param string $pCoord Coordinate address of the cell to delete
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* @throws PHPExcel_Exception
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*/
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public function deleteCacheData($pCoord)
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{
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if ($pCoord === $this->currentObjectID && !is_null($this->currentObject)) {
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$this->currentObject->detach();
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$this->currentObjectID = $this->currentObject = null;
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}
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if (is_object($this->cellCache[$pCoord])) {
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$this->cellCache[$pCoord]->detach();
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unset($this->cellCache[$pCoord]);
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}
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$this->currentCellIsDirty = false;
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}
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/**
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* Get a list of all cell addresses currently held in cache
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*
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* @return string[]
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*/
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public function getCellList()
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{
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return array_keys($this->cellCache);
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}
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/**
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* Sort the list of all cell addresses currently held in cache by row and column
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*
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* @return string[]
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*/
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public function getSortedCellList()
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{
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$sortKeys = array();
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foreach ($this->getCellList() as $coord) {
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sscanf($coord, '%[A-Z]%d', $column, $row);
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$sortKeys[sprintf('%09d%3s', $row, $column)] = $coord;
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}
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ksort($sortKeys);
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return array_values($sortKeys);
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}
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/**
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* Get highest worksheet column and highest row that have cell records
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*
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* @return array Highest column name and highest row number
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*/
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public function getHighestRowAndColumn()
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{
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// Lookup highest column and highest row
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$col = array('A' => '1A');
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$row = array(1);
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foreach ($this->getCellList() as $coord) {
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sscanf($coord, '%[A-Z]%d', $c, $r);
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$row[$r] = $r;
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$col[$c] = strlen($c).$c;
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}
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if (!empty($row)) {
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// Determine highest column and row
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$highestRow = max($row);
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$highestColumn = substr(max($col), 1);
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}
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return array(
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'row' => $highestRow,
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'column' => $highestColumn
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);
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}
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/**
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* Return the cell address of the currently active cell object
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*
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* @return string
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*/
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public function getCurrentAddress()
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{
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return $this->currentObjectID;
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}
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/**
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* Return the column address of the currently active cell object
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*
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* @return string
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*/
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public function getCurrentColumn()
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{
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sscanf($this->currentObjectID, '%[A-Z]%d', $column, $row);
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return $column;
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}
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/**
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* Return the row address of the currently active cell object
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*
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* @return integer
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*/
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public function getCurrentRow()
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{
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sscanf($this->currentObjectID, '%[A-Z]%d', $column, $row);
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return (integer) $row;
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}
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/**
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* Get highest worksheet column
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*
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* @param string $row Return the highest column for the specified row,
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* or the highest column of any row if no row number is passed
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* @return string Highest column name
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*/
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public function getHighestColumn($row = null)
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{
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if ($row == null) {
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$colRow = $this->getHighestRowAndColumn();
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return $colRow['column'];
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}
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$columnList = array(1);
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foreach ($this->getCellList() as $coord) {
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sscanf($coord, '%[A-Z]%d', $c, $r);
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if ($r != $row) {
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continue;
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}
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$columnList[] = PHPExcel_Cell::columnIndexFromString($c);
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}
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return PHPExcel_Cell::stringFromColumnIndex(max($columnList) - 1);
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}
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/**
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* Get highest worksheet row
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*
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* @param string $column Return the highest row for the specified column,
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* or the highest row of any column if no column letter is passed
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* @return int Highest row number
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*/
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public function getHighestRow($column = null)
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{
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if ($column == null) {
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$colRow = $this->getHighestRowAndColumn();
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return $colRow['row'];
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}
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$rowList = array(0);
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foreach ($this->getCellList() as $coord) {
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sscanf($coord, '%[A-Z]%d', $c, $r);
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if ($c != $column) {
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continue;
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}
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$rowList[] = $r;
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}
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return max($rowList);
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}
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/**
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* Generate a unique ID for cache referencing
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*
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* @return string Unique Reference
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*/
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protected function getUniqueID()
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{
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if (function_exists('posix_getpid')) {
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$baseUnique = posix_getpid();
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} else {
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$baseUnique = mt_rand();
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}
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return uniqid($baseUnique, true);
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}
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/**
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* Clone the cell collection
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*
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* @param PHPExcel_Worksheet $parent The new worksheet
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* @return void
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*/
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public function copyCellCollection(PHPExcel_Worksheet $parent)
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{
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$this->currentCellIsDirty;
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$this->storeData();
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$this->parent = $parent;
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if (($this->currentObject !== null) && (is_object($this->currentObject))) {
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$this->currentObject->attach($this);
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}
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} // function copyCellCollection()
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/**
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* Remove a row, deleting all cells in that row
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*
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* @param string $row Row number to remove
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* @return void
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*/
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public function removeRow($row)
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{
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foreach ($this->getCellList() as $coord) {
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sscanf($coord, '%[A-Z]%d', $c, $r);
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if ($r == $row) {
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$this->deleteCacheData($coord);
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}
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}
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}
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/**
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* Remove a column, deleting all cells in that column
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*
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* @param string $column Column ID to remove
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* @return void
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*/
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public function removeColumn($column)
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{
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foreach ($this->getCellList() as $coord) {
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sscanf($coord, '%[A-Z]%d', $c, $r);
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if ($c == $column) {
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$this->deleteCacheData($coord);
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}
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}
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}
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/**
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* Identify whether the caching method is currently available
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* Some methods are dependent on the availability of certain extensions being enabled in the PHP build
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*
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* @return boolean
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*/
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public static function cacheMethodIsAvailable()
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{
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return true;
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}
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}
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