usc-e-shop / pdf / fpdi / fpdi_pdf_parser.php

fpdi_pdf_parser.php in Welcart e-Commerce 2.12.4, at pdf/fpdi/fpdi_pdf_parser.php

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1	<?php
2	//
3	// FPDI - Version 1.4.2
4	//
5	// Copyright 2004-2011 Setasign - Jan Slabon
6	//
7	// Licensed under the Apache License, Version 2.0 (the "License");
8	// you may not use this file except in compliance with the License.
9	// You may obtain a copy of the License at
10	//
11	// http://www.apache.org/licenses/LICENSE-2.0
12	//
13	// Unless required by applicable law or agreed to in writing, software
14	// distributed under the License is distributed on an "AS IS" BASIS,
15	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16	// See the License for the specific language governing permissions and
17	// limitations under the License.
18	//
19	require_once( USCES_PLUGIN_DIR . '/pdf/fpdi/pdf_parser.php');
20
21
22	class fpdi_pdf_parser extends pdf_parser {
23
24	/**
25	* Pages
26	* Index beginns at 0
27	*
28	* @var array
29	*/
30	var $pages;
31
32	/**
33	* Page count
34	* @var integer
35	*/
36	var $page_count;
37
38	/**
39	* actual page number
40	* @var integer
41	*/
42	var $pageno;
43
44	/**
45	* PDF Version of imported Document
46	* @var string
47	*/
48	var $pdfVersion;
49
50	/**
51	* FPDI Reference
52	* @var object
53	*/
54	var $fpdi;
55
56	/**
57	* Available BoxTypes
58	*
59	* @var array
60	*/
61	var $availableBoxes = array('/MediaBox', '/CropBox', '/BleedBox', '/TrimBox', '/ArtBox');
62
63	/**
64	* Constructor
65	*
66	* @param string $filename Source-Filename
67	* @param object $fpdi Object of type fpdi
68	*/
69	function fpdi_pdf_parser($filename, &$fpdi) {
70	$this->fpdi =& $fpdi;
71
72	parent::pdf_parser($filename);
73
74	// resolve Pages-Dictonary
75	$pages = $this->pdf_resolve_object($this->c, $this->root[1][1]['/Pages']);
76
77	// Read pages
78	$this->read_pages($this->c, $pages, $this->pages);
79
80	// count pages;
81	$this->page_count = count($this->pages);
82	}
83
84	/**
85	* Overwrite parent::error()
86	*
87	* @param string $msg Error-Message
88	*/
89	function error($msg) {
90	$this->fpdi->error($msg);
91	}
92
93	/**
94	* Get pagecount from sourcefile
95	*
96	* @return int
97	*/
98	function getPageCount() {
99	return $this->page_count;
100	}
101
102
103	/**
104	* Set pageno
105	*
106	* @param int $pageno Pagenumber to use
107	*/
108	function setPageno($pageno) {
109	$pageno = ((int) $pageno) - 1;
110
111	if ($pageno < 0 \|\| $pageno >= $this->getPageCount()) {
112	$this->fpdi->error('Pagenumber is wrong!');
113	}
114
115	$this->pageno = $pageno;
116	}
117
118	/**
119	* Get page-resources from current page
120	*
121	* @return array
122	*/
123	function getPageResources() {
124	return $this->_getPageResources($this->pages[$this->pageno]);
125	}
126
127	/**
128	* Get page-resources from /Page
129	*
130	* @param array $obj Array of pdf-data
131	*/
132	function _getPageResources ($obj) { // $obj = /Page
133	$obj = $this->pdf_resolve_object($this->c, $obj);
134
135	// If the current object has a resources
136	// dictionary associated with it, we use
137	// it. Otherwise, we move back to its
138	// parent object.
139	if (isset ($obj[1][1]['/Resources'])) {
140	$res = $this->pdf_resolve_object($this->c, $obj[1][1]['/Resources']);
141	if ($res[0] == PDF_TYPE_OBJECT)
142	return $res[1];
143	return $res;
144	} else {
145	if (!isset ($obj[1][1]['/Parent'])) {
146	return false;
147	} else {
148	$res = $this->_getPageResources($obj[1][1]['/Parent']);
149	if ($res[0] == PDF_TYPE_OBJECT)
150	return $res[1];
151	return $res;
152	}
153	}
154	}
155
156
157	/**
158	* Get content of current page
159	*
160	* If more /Contents is an array, the streams are concated
161	*
162	* @return string
163	*/
164	function getContent() {
165	$buffer = '';
166
167	if (isset($this->pages[$this->pageno][1][1]['/Contents'])) {
168	$contents = $this->_getPageContent($this->pages[$this->pageno][1][1]['/Contents']);
169	foreach($contents AS $tmp_content) {
170	$buffer .= $this->_rebuildContentStream($tmp_content) . ' ';
171	}
172	}
173
174	return $buffer;
175	}
176
177
178	/**
179	* Resolve all content-objects
180	*
181	* @param array $content_ref
182	* @return array
183	*/
184	function _getPageContent($content_ref) {
185	$contents = array();
186
187	if ($content_ref[0] == PDF_TYPE_OBJREF) {
188	$content = $this->pdf_resolve_object($this->c, $content_ref);
189	if ($content[1][0] == PDF_TYPE_ARRAY) {
190	$contents = $this->_getPageContent($content[1]);
191	} else {
192	$contents[] = $content;
193	}
194	} else if ($content_ref[0] == PDF_TYPE_ARRAY) {
195	foreach ($content_ref[1] AS $tmp_content_ref) {
196	$contents = array_merge($contents,$this->_getPageContent($tmp_content_ref));
197	}
198	}
199
200	return $contents;
201	}
202
203
204	/**
205	* Rebuild content-streams
206	*
207	* @param array $obj
208	* @return string
209	*/
210	function _rebuildContentStream($obj) {
211	$filters = array();
212
213	if (isset($obj[1][1]['/Filter'])) {
214	$_filter = $obj[1][1]['/Filter'];
215
216	if ($_filter[0] == PDF_TYPE_OBJREF) {
217	$tmpFilter = $this->pdf_resolve_object($this->c, $_filter);
218	$_filter = $tmpFilter[1];
219	}
220
221	if ($_filter[0] == PDF_TYPE_TOKEN) {
222	$filters[] = $_filter;
223	} else if ($_filter[0] == PDF_TYPE_ARRAY) {
224	$filters = $_filter[1];
225	}
226	}
227
228	$stream = $obj[2][1];
229
230	foreach ($filters AS $_filter) {
231	switch ($_filter[1]) {
232	case '/FlateDecode':
233	case '/Fl':
234	// $stream .= "\x0F\x0D"; // in an errorious stream this suffix could work
235	// $stream .= "\x0A";
236	// $stream .= "\x0D";
237	if (function_exists('gzuncompress')) {
238	$stream = (strlen($stream) > 0) ? @gzuncompress($stream) : '';
239	} else {
240	$this->error(sprintf('To handle %s filter, please compile php with zlib support.',$_filter[1]));
241	}
242
243	if ($stream === false) {
244	$this->error('Error while decompressing stream.');
245	}
246	break;
247	case '/LZWDecode':
248	include_once('filters/FilterLZW_FPDI.php');
249	$decoder = new FilterLZW_FPDI($this->fpdi);
250	$stream = $decoder->decode($stream);
251	break;
252	case '/ASCII85Decode':
253	include_once('filters/FilterASCII85_FPDI.php');
254	$decoder = new FilterASCII85_FPDI($this->fpdi);
255	$stream = $decoder->decode($stream);
256	break;
257	case null:
258	$stream = $stream;
259	break;
260	default:
261	$this->error(sprintf('Unsupported Filter: %s',$_filter[1]));
262	}
263	}
264
265	return $stream;
266	}
267
268
269	/**
270	* Get a Box from a page
271	* Arrayformat is same as used by fpdf_tpl
272	*
273	* @param array $page a /Page
274	* @param string $box_index Type of Box @see $availableBoxes
275	* @param float Scale factor from user space units to points
276	* @return array
277	*/
278	function getPageBox($page, $box_index, $k) {
279	$page = $this->pdf_resolve_object($this->c, $page);
280	$box = null;
281	if (isset($page[1][1][$box_index]))
282	$box =& $page[1][1][$box_index];
283
284	if (!is_null($box) && $box[0] == PDF_TYPE_OBJREF) {
285	$tmp_box = $this->pdf_resolve_object($this->c, $box);
286	$box = $tmp_box[1];
287	}
288
289	if (!is_null($box) && $box[0] == PDF_TYPE_ARRAY) {
290	$b =& $box[1];
291	return array('x' => $b[0][1] / $k,
292	'y' => $b[1][1] / $k,
293	'w' => abs($b[0][1] - $b[2][1]) / $k,
294	'h' => abs($b[1][1] - $b[3][1]) / $k,
295	'llx' => min($b[0][1], $b[2][1]) / $k,
296	'lly' => min($b[1][1], $b[3][1]) / $k,
297	'urx' => max($b[0][1], $b[2][1]) / $k,
298	'ury' => max($b[1][1], $b[3][1]) / $k,
299	);
300	} else if (!isset ($page[1][1]['/Parent'])) {
301	return false;
302	} else {
303	return $this->getPageBox($this->pdf_resolve_object($this->c, $page[1][1]['/Parent']), $box_index, $k);
304	}
305	}
306
307	/**
308	* Get all page boxes by page no
309	*
310	* @param int The page number
311	* @param float Scale factor from user space units to points
312	* @return array
313	*/
314	function getPageBoxes($pageno, $k) {
315	return $this->_getPageBoxes($this->pages[$pageno - 1], $k);
316	}
317
318	/**
319	* Get all boxes from /Page
320	*
321	* @param array a /Page
322	* @return array
323	*/
324	function _getPageBoxes($page, $k) {
325	$boxes = array();
326
327	foreach($this->availableBoxes AS $box) {
328	if ($_box = $this->getPageBox($page, $box, $k)) {
329	$boxes[$box] = $_box;
330	}
331	}
332
333	return $boxes;
334	}
335
336	/**
337	* Get the page rotation by pageno
338	*
339	* @param integer $pageno
340	* @return array
341	*/
342	function getPageRotation($pageno) {
343	return $this->_getPageRotation($this->pages[$pageno - 1]);
344	}
345
346	function _getPageRotation($obj) { // $obj = /Page
347	$obj = $this->pdf_resolve_object($this->c, $obj);
348	if (isset ($obj[1][1]['/Rotate'])) {
349	$res = $this->pdf_resolve_object($this->c, $obj[1][1]['/Rotate']);
350	if ($res[0] == PDF_TYPE_OBJECT)
351	return $res[1];
352	return $res;
353	} else {
354	if (!isset ($obj[1][1]['/Parent'])) {
355	return false;
356	} else {
357	$res = $this->_getPageRotation($obj[1][1]['/Parent']);
358	if ($res[0] == PDF_TYPE_OBJECT)
359	return $res[1];
360	return $res;
361	}
362	}
363	}
364
365	/**
366	* Read all /Page(es)
367	*
368	* @param object pdf_context
369	* @param array /Pages
370	* @param array the result-array
371	*/
372	function read_pages(&$c, &$pages, &$result) {
373	// Get the kids dictionary
374	$_kids = $this->pdf_resolve_object ($c, $pages[1][1]['/Kids']);
375
376	if (!is_array($_kids))
377	$this->error('Cannot find /Kids in current /Page-Dictionary');
378
379	if ($_kids[1][0] == PDF_TYPE_ARRAY) {
380	$kids = $_kids[1][1];
381	} else {
382	$kids = $_kids[1];
383	}
384
385	foreach ($kids as $v) {
386	$pg = $this->pdf_resolve_object ($c, $v);
387	if ($pg[1][1]['/Type'][1] === '/Pages') {
388	// If one of the kids is an embedded
389	// /Pages array, resolve it as well.
390	$this->read_pages($c, $pg, $result);
391	} else {
392	$result[] = $pg;
393	}
394	}
395	}
396
397
398
399	/**
400	* Get PDF-Version
401	*
402	* And reset the PDF Version used in FPDI if needed
403	*/
404	function getPDFVersion() {
405	parent::getPDFVersion();
406	$this->fpdi->setPDFVersion(max($this->fpdi->getPDFVersion(), $this->pdfVersion));
407	}
408	}