1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2012 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 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 1.7.8, 2012-10-12
*/
/**
* PHPExcel_CachedObjectStorage_PHPTemp
*
* @category PHPExcel
* @package PHPExcel_CachedObjectStorage
* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
*/
class PHPExcel_CachedObjectStorage_PHPTemp extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
/**
* Name of the file for this cache
*
* @var string
*/
private $_fileHandle = null;
/**
* Memory limit to use before reverting to file cache
*
* @var integer
*/
private $_memoryCacheSize = null;
/**
* Store cell data in cache for the current cell object if it's "dirty",
* and the 'nullify' the current cell object
*
* @return void
* @throws Exception
*/
private function _storeData() {
if ($this->_currentCellIsDirty) {
$this->_currentObject->detach();
fseek($this->_fileHandle,0,SEEK_END);
$offset = ftell($this->_fileHandle);
fwrite($this->_fileHandle, serialize($this->_currentObject));
$this->_cellCache[$this->_currentObjectID] = array('ptr' => $offset,
'sz' => ftell($this->_fileHandle) - $offset
);
$this->_currentCellIsDirty = false;
}
$this->_currentObjectID = $this->_currentObject = null;
} // function _storeData()
/**
* Add or Update a cell in cache identified by coordinate address
*
* @param string $pCoord Coordinate address of the cell to update
* @param PHPExcel_Cell $cell Cell to update
* @return void
* @throws Exception
*/
public function addCacheData($pCoord, PHPExcel_Cell $cell) {
if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) {
$this->_storeData();
}
$this->_currentObjectID = $pCoord;
$this->_currentObject = $cell;
$this->_currentCellIsDirty = true;
return $cell;
} // function addCacheData()
/**
* Get cell at a specific coordinate
*
* @param string $pCoord Coordinate of the cell
* @throws Exception
* @return PHPExcel_Cell Cell that was found, or null if not found
*/
public function getCacheData($pCoord) {
if ($pCoord === $this->_currentObjectID) {
return $this->_currentObject;
}
$this->_storeData();
// Check if the entry that has been requested actually exists
if (!isset($this->_cellCache[$pCoord])) {
// Return null if requested entry doesn't exist in cache
return null;
}
// Set current entry to the requested entry
$this->_currentObjectID = $pCoord;
fseek($this->_fileHandle,$this->_cellCache[$pCoord]['ptr']);
$this->_currentObject = unserialize(fread($this->_fileHandle,$this->_cellCache[$pCoord]['sz']));
// Re-attach the parent worksheet
$this->_currentObject->attach($this->_parent);
// Return requested entry
return $this->_currentObject;
} // function getCacheData()
/**
* Clone the cell collection
*
* @param PHPExcel_Worksheet $parent The new worksheet
* @return void
*/
public function copyCellCollection(PHPExcel_Worksheet $parent) {
parent::copyCellCollection($parent);
// Open a new stream for the cell cache data
$newFileHandle = fopen('php://temp/maxmemory:'.$this->_memoryCacheSize,'a+');
// Copy the existing cell cache data to the new stream
fseek($this->_fileHandle,0);
while (!feof($this->_fileHandle)) {
fwrite($newFileHandle,fread($this->_fileHandle, 1024));
}
$this->_fileHandle = $newFileHandle;
} // function copyCellCollection()
/**
* Clear the cell collection and disconnect from our parent
*
* @return void
*/
public function unsetWorksheetCells() {
if(!is_null($this->_currentObject)) {
$this->_currentObject->detach();
$this->_currentObject = $this->_currentObjectID = null;
}
$this->_cellCache = array();
// detach ourself from the worksheet, so that it can then delete this object successfully
$this->_parent = null;
// Close down the php://temp file
$this->__destruct();
} // function unsetWorksheetCells()
/**
* Initialise this new cell collection
*
* @param PHPExcel_Worksheet $parent The worksheet for this cell collection
* @param array of mixed $arguments Additional initialisation arguments
*/
public function __construct(PHPExcel_Worksheet $parent, $arguments) {
$this->_memoryCacheSize = (isset($arguments['memoryCacheSize'])) ? $arguments['memoryCacheSize'] : '1MB';
parent::__construct($parent);
if (is_null($this->_fileHandle)) {
$this->_fileHandle = fopen('php://temp/maxmemory:'.$this->_memoryCacheSize,'a+');
}
} // function __construct()
/**
* Destroy this cell collection
*/
public function __destruct() {
if (!is_null($this->_fileHandle)) {
fclose($this->_fileHandle);
}
$this->_fileHandle = null;
} // function __destruct()
}
|
