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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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