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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
<?php
/**
* This file is part of FPDI
*
* @package setasign\Fpdi
* @copyright Copyright (c) 2020 Setasign GmbH & Co. KG (https://www.setasign.com)
* @license http://opensource.org/licenses/mit-license The MIT License
*/
namespace setasign\Fpdi\PdfReader;
use setasign\Fpdi\PdfParser\Filter\FilterException;
use setasign\Fpdi\PdfParser\PdfParser;
use setasign\Fpdi\PdfParser\PdfParserException;
use setasign\Fpdi\PdfParser\Type\PdfArray;
use setasign\Fpdi\PdfParser\Type\PdfDictionary;
use setasign\Fpdi\PdfParser\Type\PdfIndirectObject;
use setasign\Fpdi\PdfParser\Type\PdfNull;
use setasign\Fpdi\PdfParser\Type\PdfNumeric;
use setasign\Fpdi\PdfParser\Type\PdfStream;
use setasign\Fpdi\PdfParser\Type\PdfType;
use setasign\Fpdi\PdfParser\Type\PdfTypeException;
use setasign\Fpdi\PdfReader\DataStructure\Rectangle;
use setasign\Fpdi\PdfParser\CrossReference\CrossReferenceException;
/**
* Class representing a page of a PDF document
*/
class Page
{
/**
* @var PdfIndirectObject
*/
protected $pageObject;
/**
* @var PdfDictionary
*/
protected $pageDictionary;
/**
* @var PdfParser
*/
protected $parser;
/**
* Inherited attributes
*
* @var null|array
*/
protected $inheritedAttributes;
/**
* Page constructor.
*
* @param PdfIndirectObject $page
* @param PdfParser $parser
*/
public function __construct(PdfIndirectObject $page, PdfParser $parser)
{
$this->pageObject = $page;
$this->parser = $parser;
}
/**
* Get the indirect object of this page.
*
* @return PdfIndirectObject
*/
public function getPageObject()
{
return $this->pageObject;
}
/**
* Get the dictionary of this page.
*
* @return PdfDictionary
* @throws PdfParserException
* @throws PdfTypeException
* @throws CrossReferenceException
*/
public function getPageDictionary()
{
if (null === $this->pageDictionary) {
$this->pageDictionary = PdfDictionary::ensure(PdfType::resolve($this->getPageObject(), $this->parser));
}
return $this->pageDictionary;
}
/**
* Get a page attribute.
*
* @param string $name
* @param bool $inherited
* @return PdfType|null
* @throws PdfParserException
* @throws PdfTypeException
* @throws CrossReferenceException
*/
public function getAttribute($name, $inherited = true)
{
$dict = $this->getPageDictionary();
if (isset($dict->value[$name])) {
return $dict->value[$name];
}
$inheritedKeys = ['Resources', 'MediaBox', 'CropBox', 'Rotate'];
if ($inherited && \in_array($name, $inheritedKeys, true)) {
if ($this->inheritedAttributes === null) {
$this->inheritedAttributes = [];
$inheritedKeys = \array_filter($inheritedKeys, function ($key) use ($dict) {
return !isset($dict->value[$key]);
});
if (\count($inheritedKeys) > 0) {
$parentDict = PdfType::resolve(PdfDictionary::get($dict, 'Parent'), $this->parser);
while ($parentDict instanceof PdfDictionary) {
foreach ($inheritedKeys as $index => $key) {
if (isset($parentDict->value[$key])) {
$this->inheritedAttributes[$key] = $parentDict->value[$key];
unset($inheritedKeys[$index]);
}
}
/** @noinspection NotOptimalIfConditionsInspection */
if (isset($parentDict->value['Parent']) && \count($inheritedKeys) > 0) {
$parentDict = PdfType::resolve(PdfDictionary::get($parentDict, 'Parent'), $this->parser);
} else {
break;
}
}
}
}
if (isset($this->inheritedAttributes[$name])) {
return $this->inheritedAttributes[$name];
}
}
return null;
}
/**
* Get the rotation value.
*
* @return int
* @throws PdfParserException
* @throws PdfTypeException
* @throws CrossReferenceException
*/
public function getRotation()
{
$rotation = $this->getAttribute('Rotate');
if (null === $rotation) {
return 0;
}
$rotation = PdfNumeric::ensure(PdfType::resolve($rotation, $this->parser))->value % 360;
if ($rotation < 0) {
$rotation += 360;
}
return $rotation;
}
/**
* Get a boundary of this page.
*
* @param string $box
* @param bool $fallback
* @return bool|Rectangle
* @throws PdfParserException
* @throws PdfTypeException
* @throws CrossReferenceException
* @see PageBoundaries
*/
public function getBoundary($box = PageBoundaries::CROP_BOX, $fallback = true)
{
$value = $this->getAttribute($box);
if ($value !== null) {
return Rectangle::byPdfArray($value, $this->parser);
}
if ($fallback === false) {
return false;
}
switch ($box) {
case PageBoundaries::BLEED_BOX:
case PageBoundaries::TRIM_BOX:
case PageBoundaries::ART_BOX:
return $this->getBoundary(PageBoundaries::CROP_BOX, true);
case PageBoundaries::CROP_BOX:
return $this->getBoundary(PageBoundaries::MEDIA_BOX, true);
}
return false;
}
/**
* Get the width and height of this page.
*
* @param string $box
* @param bool $fallback
* @return array|bool
* @throws PdfParserException
* @throws PdfTypeException
* @throws CrossReferenceException
*/
public function getWidthAndHeight($box = PageBoundaries::CROP_BOX, $fallback = true)
{
$boundary = $this->getBoundary($box, $fallback);
if ($boundary === false) {
return false;
}
$rotation = $this->getRotation();
$interchange = ($rotation / 90) % 2;
return [
$interchange ? $boundary->getHeight() : $boundary->getWidth(),
$interchange ? $boundary->getWidth() : $boundary->getHeight()
];
}
/**
* Get the raw content stream.
*
* @return string
* @throws PdfReaderException
* @throws PdfTypeException
* @throws FilterException
* @throws PdfParserException
*/
public function getContentStream()
{
$dict = $this->getPageDictionary();
$contents = PdfType::resolve(PdfDictionary::get($dict, 'Contents'), $this->parser);
if ($contents instanceof PdfNull) {
return '';
}
if ($contents instanceof PdfArray) {
$result = [];
foreach ($contents->value as $content) {
$content = PdfType::resolve($content, $this->parser);
if (!($content instanceof PdfStream)) {
continue;
}
$result[] = $content->getUnfilteredStream();
}
return \implode("\n", $result);
}
if ($contents instanceof PdfStream) {
return $contents->getUnfilteredStream();
}
throw new PdfReaderException(
'Array or stream expected.',
PdfReaderException::UNEXPECTED_DATA_TYPE
);
}
}
|
