Subversion Repositories eFlore/Applications.cel

Rev

Rev 2388 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2388 jpm 1
<?php
2
/**
3
 * PHPExcel
4
 *
5
 * Copyright (c) 2006 - 2013 PHPExcel
6
 *
7
 * This library is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * This library is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with this library; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
20
 *
21
 * @category   PHPExcel
22
 * @package    PHPExcel_CachedObjectStorage
23
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
24
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
25
 * @version    ##VERSION##, ##DATE##
26
 */
27
 
28
 
29
/**
30
 * PHPExcel_CachedObjectStorage_PHPTemp
31
 *
32
 * @category   PHPExcel
33
 * @package    PHPExcel_CachedObjectStorage
34
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
35
 */
36
class PHPExcel_CachedObjectStorage_PHPTemp extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
37
 
38
	/**
39
	 * Name of the file for this cache
40
	 *
41
	 * @var string
42
	 */
43
	private $_fileHandle = null;
44
 
45
	/**
46
	 * Memory limit to use before reverting to file cache
47
	 *
48
	 * @var integer
49
	 */
50
	private $_memoryCacheSize = null;
51
 
52
    /**
53
     * Store cell data in cache for the current cell object if it's "dirty",
54
     *     and the 'nullify' the current cell object
55
     *
56
	 * @return	void
57
     * @throws	PHPExcel_Exception
58
     */
59
	protected function _storeData() {
60
		if ($this->_currentCellIsDirty) {
61
			$this->_currentObject->detach();
62
 
63
			fseek($this->_fileHandle,0,SEEK_END);
64
			$offset = ftell($this->_fileHandle);
65
			fwrite($this->_fileHandle, serialize($this->_currentObject));
66
			$this->_cellCache[$this->_currentObjectID]	= array('ptr' => $offset,
67
																'sz'  => ftell($this->_fileHandle) - $offset
68
															   );
69
			$this->_currentCellIsDirty = false;
70
		}
71
		$this->_currentObjectID = $this->_currentObject = null;
72
	}	//	function _storeData()
73
 
74
 
75
    /**
76
     * Add or Update a cell in cache identified by coordinate address
77
     *
78
     * @param	string			$pCoord		Coordinate address of the cell to update
79
     * @param	PHPExcel_Cell	$cell		Cell to update
80
	 * @return	void
81
     * @throws	PHPExcel_Exception
82
     */
83
	public function addCacheData($pCoord, PHPExcel_Cell $cell) {
84
		if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) {
85
			$this->_storeData();
86
		}
87
 
88
		$this->_currentObjectID = $pCoord;
89
		$this->_currentObject = $cell;
90
		$this->_currentCellIsDirty = true;
91
 
92
		return $cell;
93
	}	//	function addCacheData()
94
 
95
 
96
    /**
97
     * Get cell at a specific coordinate
98
     *
99
     * @param 	string 			$pCoord		Coordinate of the cell
100
     * @throws 	PHPExcel_Exception
101
     * @return 	PHPExcel_Cell 	Cell that was found, or null if not found
102
     */
103
	public function getCacheData($pCoord) {
104
		if ($pCoord === $this->_currentObjectID) {
105
			return $this->_currentObject;
106
		}
107
		$this->_storeData();
108
 
109
		//	Check if the entry that has been requested actually exists
110
		if (!isset($this->_cellCache[$pCoord])) {
111
			//	Return null if requested entry doesn't exist in cache
112
			return null;
113
		}
114
 
115
		//	Set current entry to the requested entry
116
		$this->_currentObjectID = $pCoord;
117
		fseek($this->_fileHandle,$this->_cellCache[$pCoord]['ptr']);
118
		$this->_currentObject = unserialize(fread($this->_fileHandle,$this->_cellCache[$pCoord]['sz']));
119
        //    Re-attach this as the cell's parent
120
        $this->_currentObject->attach($this);
121
 
122
		//	Return requested entry
123
		return $this->_currentObject;
124
	}	//	function getCacheData()
125
 
126
 
127
	/**
128
	 * Get a list of all cell addresses currently held in cache
129
	 *
130
	 * @return  array of string
131
	 */
132
	public function getCellList() {
133
		if ($this->_currentObjectID !== null) {
134
			$this->_storeData();
135
		}
136
 
137
		return parent::getCellList();
138
	}
139
 
140
 
141
	/**
142
	 * Clone the cell collection
143
	 *
144
	 * @param	PHPExcel_Worksheet	$parent		The new worksheet
145
	 * @return	void
146
	 */
147
	public function copyCellCollection(PHPExcel_Worksheet $parent) {
148
		parent::copyCellCollection($parent);
149
		//	Open a new stream for the cell cache data
150
		$newFileHandle = fopen('php://temp/maxmemory:'.$this->_memoryCacheSize,'a+');
151
		//	Copy the existing cell cache data to the new stream
152
		fseek($this->_fileHandle,0);
153
		while (!feof($this->_fileHandle)) {
154
			fwrite($newFileHandle,fread($this->_fileHandle, 1024));
155
		}
156
		$this->_fileHandle = $newFileHandle;
157
	}	//	function copyCellCollection()
158
 
159
 
160
	/**
161
	 * Clear the cell collection and disconnect from our parent
162
	 *
163
	 * @return	void
164
	 */
165
	public function unsetWorksheetCells() {
166
		if(!is_null($this->_currentObject)) {
167
			$this->_currentObject->detach();
168
			$this->_currentObject = $this->_currentObjectID = null;
169
		}
170
		$this->_cellCache = array();
171
 
172
		//	detach ourself from the worksheet, so that it can then delete this object successfully
173
		$this->_parent = null;
174
 
175
		//	Close down the php://temp file
176
		$this->__destruct();
177
	}	//	function unsetWorksheetCells()
178
 
179
 
180
	/**
181
	 * Initialise this new cell collection
182
	 *
183
	 * @param	PHPExcel_Worksheet	$parent		The worksheet for this cell collection
184
	 * @param	array of mixed		$arguments	Additional initialisation arguments
185
	 */
186
	public function __construct(PHPExcel_Worksheet $parent, $arguments) {
187
		$this->_memoryCacheSize	= (isset($arguments['memoryCacheSize']))	? $arguments['memoryCacheSize']	: '1MB';
188
 
189
		parent::__construct($parent);
190
		if (is_null($this->_fileHandle)) {
191
			$this->_fileHandle = fopen('php://temp/maxmemory:'.$this->_memoryCacheSize,'a+');
192
		}
193
	}	//	function __construct()
194
 
195
 
196
	/**
197
	 * Destroy this cell collection
198
	 */
199
	public function __destruct() {
200
		if (!is_null($this->_fileHandle)) {
201
			fclose($this->_fileHandle);
202
		}
203
		$this->_fileHandle = null;
204
	}	//	function __destruct()
205
 
206
}