1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
/* |
4
|
|
|
* This file is part of the kaloa/xmp package. |
5
|
|
|
* |
6
|
|
|
* For full copyright and license information, please view the LICENSE file |
7
|
|
|
* that was distributed with this source code. |
8
|
|
|
*/ |
9
|
|
|
|
10
|
|
|
namespace Kaloa\Xmp\Properties; |
11
|
|
|
|
12
|
|
|
use DateTime; |
13
|
|
|
use DOMNode; |
14
|
|
|
|
15
|
|
|
/** |
16
|
|
|
* Extracts the Exif properties from an XMP document referenced by an XPath |
17
|
|
|
* instance. |
18
|
|
|
* |
19
|
|
|
* The descriptions for all getters are taken from |
20
|
|
|
* <a href="http://www.exiv2.org/tags-xmp-exif.html">exiv2.org</a>. |
21
|
|
|
* |
22
|
|
|
* @todo More EXIF properties will be added in later versions. |
23
|
|
|
*/ |
24
|
|
|
class ExifProperties extends AbstractProperties |
25
|
|
|
{ |
26
|
|
|
/** |
27
|
|
|
* See getDateTimeOriginal. |
28
|
|
|
* |
29
|
|
|
* @var DateTime|null |
30
|
|
|
*/ |
31
|
|
|
private $dateTimeOriginal = null; |
32
|
|
|
|
33
|
|
|
/** |
34
|
|
|
* See getExifVersion. |
35
|
|
|
* |
36
|
|
|
* @var string |
37
|
|
|
*/ |
38
|
|
|
private $exifVersion = ''; |
39
|
|
|
|
40
|
|
|
/** |
41
|
|
|
* See getPixelXDimension. |
42
|
|
|
* |
43
|
|
|
* @var string |
44
|
|
|
*/ |
45
|
|
|
private $pixelXDimension = ''; |
46
|
|
|
|
47
|
|
|
/** |
48
|
|
|
* See getPixelYDimension. |
49
|
|
|
* |
50
|
|
|
* @var string |
51
|
|
|
*/ |
52
|
|
|
private $pixelYDimension = ''; |
53
|
|
|
|
54
|
|
|
/** |
55
|
|
|
* Tries to fill an entity instance variable with corresponding data from |
56
|
|
|
* the XMP document. |
57
|
|
|
* |
58
|
|
|
* Exif data might be added either as attributes or as independent elements. |
59
|
|
|
* This method checks for both. If both types are found, element content |
60
|
|
|
* will overwrite attribute content. |
61
|
|
|
* |
62
|
|
|
* @param string $entity |
63
|
|
|
*/ |
64
|
1 |
|
private function fill($entity) |
65
|
|
|
{ |
66
|
1 |
|
$value = ''; |
67
|
1 |
|
$whatLcfirst = lcfirst($entity); |
68
|
|
|
|
69
|
1 |
|
foreach ($this->xPath->query('//rdf:Description') as $node) { |
70
|
|
|
/* @var $node DOMNode */ |
71
|
1 |
|
if ($node->hasAttributes()) { |
72
|
1 |
|
$attribute = $node->attributes->getNamedItemNS( |
73
|
1 |
|
'http://ns.adobe.com/exif/1.0/', |
74
|
|
|
$entity |
75
|
1 |
|
); |
76
|
|
|
|
77
|
1 |
|
if ($attribute !== null) { |
78
|
1 |
|
$value = $attribute->nodeValue; |
79
|
1 |
|
} |
80
|
1 |
|
} |
81
|
1 |
|
} |
82
|
|
|
|
83
|
1 |
|
if ($value === '') { |
84
|
1 |
|
foreach ($this->xPath->query('//exif:' . $entity) as $node) { |
85
|
1 |
|
$value = $node->nodeValue; |
86
|
1 |
|
} |
87
|
1 |
|
} |
88
|
|
|
|
89
|
1 |
|
$this->{$whatLcfirst} = $value; |
90
|
1 |
|
} |
91
|
|
|
|
92
|
|
|
/** |
93
|
|
|
* Retrieves all properties from the underlying XMP document. |
94
|
|
|
*/ |
95
|
1 |
|
final protected function init() |
96
|
|
|
{ |
97
|
1 |
|
$this->fill('DateTimeOriginal'); |
98
|
|
|
|
99
|
1 |
|
if (trim($this->dateTimeOriginal) !== '') { |
100
|
1 |
|
$this->dateTimeOriginal = DateTime::createFromFormat( |
101
|
1 |
|
'Y-m-d\TH:i:s.uP', |
102
|
1 |
|
$this->dateTimeOriginal |
103
|
1 |
|
); |
104
|
1 |
|
} else { |
105
|
1 |
|
$this->dateTimeOriginal = null; |
106
|
|
|
} |
107
|
|
|
|
108
|
1 |
|
$this->fill('ExifVersion'); |
109
|
1 |
|
$this->fill('PixelXDimension'); |
110
|
1 |
|
$this->fill('PixelYDimension'); |
111
|
|
|
|
112
|
|
|
// Free our reference to the XPath instance. |
113
|
1 |
|
$this->xPath = null; |
114
|
1 |
|
} |
115
|
|
|
|
116
|
|
|
/** |
117
|
|
|
* Returns date and time when original image was generated, in ISO 8601 |
118
|
|
|
* format. |
119
|
|
|
* |
120
|
|
|
* @return DateTime|null |
121
|
|
|
*/ |
122
|
1 |
|
public function getDateTimeOriginal() |
123
|
|
|
{ |
124
|
1 |
|
return $this->dateTimeOriginal; |
125
|
|
|
} |
126
|
|
|
|
127
|
|
|
/** |
128
|
|
|
* Returns the EXIF version number. |
129
|
|
|
* |
130
|
|
|
* @return string |
131
|
|
|
*/ |
132
|
1 |
|
public function getExifVersion() |
133
|
|
|
{ |
134
|
1 |
|
return $this->exifVersion; |
135
|
|
|
} |
136
|
|
|
|
137
|
|
|
/** |
138
|
|
|
* Return the image width, in pixels. |
139
|
|
|
* |
140
|
|
|
* @return string |
141
|
|
|
*/ |
142
|
1 |
|
public function getPixelXDimension() |
143
|
|
|
{ |
144
|
1 |
|
return $this->pixelXDimension; |
145
|
|
|
} |
146
|
|
|
|
147
|
|
|
/** |
148
|
|
|
* Returns the image height, in pixels. |
149
|
|
|
* |
150
|
|
|
* @return string |
151
|
|
|
*/ |
152
|
1 |
|
public function getPixelYDimension() |
153
|
|
|
{ |
154
|
1 |
|
return $this->pixelYDimension; |
155
|
|
|
} |
156
|
|
|
} |
157
|
|
|
|