DjVuImage::convertDumpToXML() - Code Metrics - wikimedia/mediawiki - Measure and Improve Code Quality continuously with Scrutinizer

DjVuImage::convertDumpToXML() C
last analyzed 2016-11-13 17:42 UTC

↳ Parent: DjVuImage

Complexity

Conditions	11
Paths	12

Size

Total Lines	60
Code Lines	35

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	11
eloc	35
nc	12
nop	1
dl	0
loc	60
rs	6.2926
c	0
b	0
f	0

How to fix Long Method Complexity

<?php
/**
 * DjVu image handler.
 *
 * Copyright © 2006 Brion Vibber <[email protected]>
 * https://www.mediawiki.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @ingroup Media
 */

/**
 * Support for detecting/validating DjVu image files and getting
 * some basic file metadata (resolution etc)
 *
 * File format docs are available in source package for DjVuLibre:
 * http://djvulibre.djvuzone.org/
 *
 * @ingroup Media
 */
class DjVuImage {
	/**
	 * @const DJVUTXT_MEMORY_LIMIT Memory limit for the DjVu description software
	 */
	const DJVUTXT_MEMORY_LIMIT = 300000;

	/**
	 * Constructor
	 *
	 * @param string $filename The DjVu file name.
	 */
	function __construct( $filename ) {
		$this->mFilename = $filename;
class MyClass { }

$x = new MyClass();
$x->foo = true;
	}

	/**
	 * Check if the given file is indeed a valid DjVu image file
	 * @return bool
	 */
	public function isValid() {
		$info = $this->getInfo();

		return $info !== false;
	}

	/**
	 * Return data in the style of getimagesize()
	 * @return array|bool Array or false on failure
	 */
	public function getImageSize() {
		$data = $this->getInfo();

		if ( $data !== false ) {
			$width = $data['width'];
			$height = $data['height'];

			return [ $width, $height, 'DjVu',
				"width=\"$width\" height=\"$height\"" ];
		}

		return false;
	}

	// ---------

	/**
	 * For debugging; dump the IFF chunk structure
	 */
	function dump() {
		$file = fopen( $this->mFilename, 'rb' );
		$header = fread( $file, 12 );
		$arr = unpack( 'a4magic/a4chunk/NchunkLength', $header );
		$chunk = $arr['chunk'];
		$chunkLength = $arr['chunkLength'];
		echo "$chunk $chunkLength\n";
		$this->dumpForm( $file, $chunkLength, 1 );
		fclose( $file );
	}

	private function dumpForm( $file, $length, $indent ) {
		$start = ftell( $file );
		$secondary = fread( $file, 4 );
		echo str_repeat( ' ', $indent * 4 ) . "($secondary)\n";
		while ( ftell( $file ) - $start < $length ) {
			$chunkHeader = fread( $file, 8 );
			if ( $chunkHeader == '' ) {
				break;
			}
			$arr = unpack( 'a4chunk/NchunkLength', $chunkHeader );
			$chunk = $arr['chunk'];
			$chunkLength = $arr['chunkLength'];
			echo str_repeat( ' ', $indent * 4 ) . "$chunk $chunkLength\n";

			if ( $chunk == 'FORM' ) {
				$this->dumpForm( $file, $chunkLength, $indent + 1 );
			} else {
				fseek( $file, $chunkLength, SEEK_CUR );
				if ( $chunkLength & 1 == 1 ) {
					// Padding byte between chunks
					fseek( $file, 1, SEEK_CUR );
				}
			}
		}
	}

	function getInfo() {
		MediaWiki\suppressWarnings();
		$file = fopen( $this->mFilename, 'rb' );
		MediaWiki\restoreWarnings();
		if ( $file === false ) {
			wfDebug( __METHOD__ . ": missing or failed file read\n" );

			return false;
		}

		$header = fread( $file, 16 );
		$info = false;

		if ( strlen( $header ) < 16 ) {
			wfDebug( __METHOD__ . ": too short file header\n" );
		} else {
			$arr = unpack( 'a4magic/a4form/NformLength/a4subtype', $header );

			$subtype = $arr['subtype'];
			if ( $arr['magic'] != 'AT&T' ) {
				wfDebug( __METHOD__ . ": not a DjVu file\n" );
			} elseif ( $subtype == 'DJVU' ) {
				// Single-page document
				$info = $this->getPageInfo( $file );
			} elseif ( $subtype == 'DJVM' ) {
				// Multi-page document
				$info = $this->getMultiPageInfo( $file, $arr['formLength'] );
			} else {
				wfDebug( __METHOD__ . ": unrecognized DJVU file type '{$arr['subtype']}'\n" );
			}
		}
		fclose( $file );

		return $info;
	}

	private function readChunk( $file ) {
		$header = fread( $file, 8 );
		if ( strlen( $header ) < 8 ) {
			return [ false, 0 ];
		} else {
			$arr = unpack( 'a4chunk/Nlength', $header );

			return [ $arr['chunk'], $arr['length'] ];
		}
	}

	private function skipChunk( $file, $chunkLength ) {
		fseek( $file, $chunkLength, SEEK_CUR );

		if ( $chunkLength & 0x01 == 1 && !feof( $file ) ) {
			// padding byte
			fseek( $file, 1, SEEK_CUR );
		}
	}

	private function getMultiPageInfo( $file, $formLength ) {
		// For now, we'll just look for the first page in the file
		// and report its information, hoping others are the same size.
		$start = ftell( $file );
		do {
			list( $chunk, $length ) = $this->readChunk( $file );
			if ( !$chunk ) {
				break;
			}

			if ( $chunk == 'FORM' ) {
				$subtype = fread( $file, 4 );
				if ( $subtype == 'DJVU' ) {
					wfDebug( __METHOD__ . ": found first subpage\n" );

					return $this->getPageInfo( $file );
				}
				$this->skipChunk( $file, $length - 4 );
			} else {
				wfDebug( __METHOD__ . ": skipping '$chunk' chunk\n" );
				$this->skipChunk( $file, $length );
			}
		} while ( $length != 0 && !feof( $file ) && ftell( $file ) - $start < $formLength );

		wfDebug( __METHOD__ . ": multi-page DJVU file contained no pages\n" );

		return false;
	}

	private function getPageInfo( $file ) {
		list( $chunk, $length ) = $this->readChunk( $file );
		if ( $chunk != 'INFO' ) {
			wfDebug( __METHOD__ . ": expected INFO chunk, got '$chunk'\n" );

			return false;
		}

		if ( $length < 9 ) {
			wfDebug( __METHOD__ . ": INFO should be 9 or 10 bytes, found $length\n" );

			return false;
		}
		$data = fread( $file, $length );
		if ( strlen( $data ) < $length ) {
			wfDebug( __METHOD__ . ": INFO chunk cut off\n" );

			return false;
		}

		$arr = unpack(
			'nwidth/' .
			'nheight/' .
			'Cminor/' .
			'Cmajor/' .
			'vresolution/' .
			'Cgamma', $data );

		# Newer files have rotation info in byte 10, but we don't use it yet.

		return [
			'width' => $arr['width'],
			'height' => $arr['height'],
			'version' => "{$arr['major']}.{$arr['minor']}",
			'resolution' => $arr['resolution'],
			'gamma' => $arr['gamma'] / 10.0 ];
	}

	/**
	 * Return an XML string describing the DjVu image
	 * @return string|bool
	 */
	function retrieveMetaData() {
		global $wgDjvuToXML, $wgDjvuDump, $wgDjvuTxt;

		if ( !$this->isValid() ) {
			return false;
		}

		if ( isset( $wgDjvuDump ) ) {
			# djvudump is faster as of version 3.5
			# https://sourceforge.net/p/djvu/bugs/71/
			$cmd = wfEscapeShellArg( $wgDjvuDump ) . ' ' . wfEscapeShellArg( $this->mFilename );
			$dump = wfShellExec( $cmd );
			$xml = $this->convertDumpToXML( $dump );
		} elseif ( isset( $wgDjvuToXML ) ) {
			$cmd = wfEscapeShellArg( $wgDjvuToXML ) . ' --without-anno --without-text ' .
				wfEscapeShellArg( $this->mFilename );
			$xml = wfShellExec( $cmd );
		} else {
			$xml = null;
		}
		# Text layer
		if ( isset( $wgDjvuTxt ) ) {
			$cmd = wfEscapeShellArg( $wgDjvuTxt ) . ' --detail=page ' . wfEscapeShellArg( $this->mFilename );
			wfDebug( __METHOD__ . ": $cmd\n" );
			$retval = '';
			$txt = wfShellExec( $cmd, $retval, [], [ 'memory' => self::DJVUTXT_MEMORY_LIMIT ] );
			if ( $retval == 0 ) {
				# Strip some control characters
				$txt = preg_replace( "/[\013\035\037]/", "", $txt );
				$reg = <<<EOR
					/\(page\s[\d-]*\s[\d-]*\s[\d-]*\s[\d-]*\s*"
					((?>    # Text to match is composed of atoms of either:
					  \\\\. # - any escaped character
					  |     # - any character different from " and \
					  [^"\\\\]+
					)*?)
					"\s*\)
					| # Or page can be empty ; in this case, djvutxt dumps ()
					\(\s*()\)/sx
EOR;
				$txt = preg_replace_callback( $reg, [ $this, 'pageTextCallback' ], $txt );
				$txt = "<DjVuTxt>\n<HEAD></HEAD>\n<BODY>\n" . $txt . "</BODY>\n</DjVuTxt>\n";
				$xml = preg_replace( "/<DjVuXML>/", "<mw-djvu><DjVuXML>", $xml, 1 );
				$xml = $xml . $txt . '</mw-djvu>';
			}
		}

		return $xml;
	}

	function pageTextCallback( $matches ) {
		# Get rid of invalid UTF-8, strip control characters
		$val = htmlspecialchars( UtfNormal\Validator::cleanUp( stripcslashes( $matches[1] ) ) );
		$val = str_replace( [ "\n", '�' ], [ '&#10;', '' ], $val );
		return '<PAGE value="' . $val . '" />';
	}

	/**
	 * Hack to temporarily work around djvutoxml bug
	 * @param string $dump
	 * @return string
	 */
	function convertDumpToXML( $dump ) {
		if ( strval( $dump ) == '' ) {
			return false;
		}

		$xml = <<<EOT
<?xml version="1.0" ?>
<!DOCTYPE DjVuXML PUBLIC "-//W3C//DTD DjVuXML 1.1//EN" "pubtext/DjVuXML-s.dtd">
<DjVuXML>
<HEAD></HEAD>
<BODY>
EOT;

		$dump = str_replace( "\r", '', $dump );
		$line = strtok( $dump, "\n" );
		$m = false;
		$good = false;
		if ( preg_match( '/^( *)FORM:DJVU/', $line, $m ) ) {
			# Single-page
			if ( $this->parseFormDjvu( $line, $xml ) ) {
				$good = true;
			} else {
				return false;
			}
		} elseif ( preg_match( '/^( *)FORM:DJVM/', $line, $m ) ) {
			# Multi-page
			$parentLevel = strlen( $m[1] );
			# Find DIRM
			$line = strtok( "\n" );
			while ( $line !== false ) {
				$childLevel = strspn( $line, ' ' );
				if ( $childLevel <= $parentLevel ) {
					# End of chunk
					break;
				}

				if ( preg_match( '/^ *DIRM.*indirect/', $line ) ) {
					wfDebug( "Indirect multi-page DjVu document, bad for server!\n" );

					return false;
				}
				if ( preg_match( '/^ *FORM:DJVU/', $line ) ) {
					# Found page
					if ( $this->parseFormDjvu( $line, $xml ) ) {
						$good = true;
					} else {
						return false;
					}
				}
				$line = strtok( "\n" );
			}
		}
		if ( !$good ) {
			return false;
		}

		$xml .= "</BODY>\n</DjVuXML>\n";

		return $xml;
	}

	function parseFormDjvu( $line, &$xml ) {
		$parentLevel = strspn( $line, ' ' );
		$line = strtok( "\n" );

		# Find INFO
		while ( $line !== false ) {
			$childLevel = strspn( $line, ' ' );
			if ( $childLevel <= $parentLevel ) {
				# End of chunk
				break;
			}

			if ( preg_match(
				'/^ *INFO *\[\d*\] *DjVu *(\d+)x(\d+), *\w*, *(\d+) *dpi, *gamma=([0-9.-]+)/',
				$line,
				$m
			) ) {
				$xml .= Xml::tags(
					'OBJECT',
					[
						# 'data' => '',
						# 'type' => 'image/x.djvu',
						'height' => $m[2],
						'width' => $m[1],
						# 'usemap' => '',
					],
					"\n" .
						Xml::element( 'PARAM', [ 'name' => 'DPI', 'value' => $m[3] ] ) . "\n" .
						Xml::element( 'PARAM', [ 'name' => 'GAMMA', 'value' => $m[4] ] ) . "\n"
				) . "\n";

				return true;
			}
			$line = strtok( "\n" );
		}

		# Not found
		return false;
	}
}


1		<?php
2		/**
3		* DjVu image handler.
4		*
5		* Copyright © 2006 Brion Vibber <[email protected]>
6		* https://www.mediawiki.org/
7		*
8		* This program is free software; you can redistribute it and/or modify
9		* it under the terms of the GNU General Public License as published by
10		* the Free Software Foundation; either version 2 of the License, or
11		* (at your option) any later version.
12		*
13		* This program is distributed in the hope that it will be useful,
14		* but WITHOUT ANY WARRANTY; without even the implied warranty of
15		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16		* GNU General Public License for more details.
17		*
18		* You should have received a copy of the GNU General Public License along
19		* with this program; if not, write to the Free Software Foundation, Inc.,
20		* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21		* http://www.gnu.org/copyleft/gpl.html
22		*
23		* @file
24		* @ingroup Media
25		*/
26
27		/**
28		* Support for detecting/validating DjVu image files and getting
29		* some basic file metadata (resolution etc)
30		*
31		* File format docs are available in source package for DjVuLibre:
32		* http://djvulibre.djvuzone.org/
33		*
34		* @ingroup Media
35		*/
36		class DjVuImage {
37		/**
38		* @const DJVUTXT_MEMORY_LIMIT Memory limit for the DjVu description software
39		*/
40		const DJVUTXT_MEMORY_LIMIT = 300000;
41
42		/**
43		* Constructor
44		*
45		* @param string $filename The DjVu file name.
46		*/
47		function __construct( $filename ) {
48		$this->mFilename = $filename;
		0 ignored issues – show Bug introduced 2016-01-16 18:00 UTC by Report Bug Copy Issue Report The property `mFilename` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
49		}
50
51		/**
52		* Check if the given file is indeed a valid DjVu image file
53		* @return bool
54		*/
55		public function isValid() {
56		$info = $this->getInfo();
57
58		return $info !== false;
59		}
60
61		/**
62		* Return data in the style of getimagesize()
63		* @return array\|bool Array or false on failure
64		*/
65		public function getImageSize() {
66		$data = $this->getInfo();
67
68		if ( $data !== false ) {
69		$width = $data['width'];
70		$height = $data['height'];
71
72		return [ $width, $height, 'DjVu',
73		"width=\"$width\" height=\"$height\"" ];
74		}
75
76		return false;
77		}
78
79		// ---------
80
81		/**
82		* For debugging; dump the IFF chunk structure
83		*/
84		function dump() {
85		$file = fopen( $this->mFilename, 'rb' );
86		$header = fread( $file, 12 );
87		$arr = unpack( 'a4magic/a4chunk/NchunkLength', $header );
88		$chunk = $arr['chunk'];
89		$chunkLength = $arr['chunkLength'];
90		echo "$chunk $chunkLength\n";
91		$this->dumpForm( $file, $chunkLength, 1 );
92		fclose( $file );
93		}
94
95		private function dumpForm( $file, $length, $indent ) {
96		$start = ftell( $file );
97		$secondary = fread( $file, 4 );
98		echo str_repeat( ' ', $indent * 4 ) . "($secondary)\n";
99		while ( ftell( $file ) - $start < $length ) {
100		$chunkHeader = fread( $file, 8 );
101		if ( $chunkHeader == '' ) {
102		break;
103		}
104		$arr = unpack( 'a4chunk/NchunkLength', $chunkHeader );
105		$chunk = $arr['chunk'];
106		$chunkLength = $arr['chunkLength'];
107		echo str_repeat( ' ', $indent * 4 ) . "$chunk $chunkLength\n";
108
109		if ( $chunk == 'FORM' ) {
110		$this->dumpForm( $file, $chunkLength, $indent + 1 );
111	View Code Duplication	} else {
112		fseek( $file, $chunkLength, SEEK_CUR );
113		if ( $chunkLength & 1 == 1 ) {
114		// Padding byte between chunks
115		fseek( $file, 1, SEEK_CUR );
116		}
117		}
118		}
119		}
120
121		function getInfo() {
122		MediaWiki\suppressWarnings();
123		$file = fopen( $this->mFilename, 'rb' );
124		MediaWiki\restoreWarnings();
125		if ( $file === false ) {
126		wfDebug( __METHOD__ . ": missing or failed file read\n" );
127
128		return false;
129		}
130
131		$header = fread( $file, 16 );
132		$info = false;
133
134		if ( strlen( $header ) < 16 ) {
135		wfDebug( __METHOD__ . ": too short file header\n" );
136		} else {
137		$arr = unpack( 'a4magic/a4form/NformLength/a4subtype', $header );
138
139		$subtype = $arr['subtype'];
140		if ( $arr['magic'] != 'AT&T' ) {
141		wfDebug( __METHOD__ . ": not a DjVu file\n" );
142		} elseif ( $subtype == 'DJVU' ) {
143		// Single-page document
144		$info = $this->getPageInfo( $file );
145		} elseif ( $subtype == 'DJVM' ) {
146		// Multi-page document
147		$info = $this->getMultiPageInfo( $file, $arr['formLength'] );
148		} else {
149		wfDebug( __METHOD__ . ": unrecognized DJVU file type '{$arr['subtype']}'\n" );
150		}
151		}
152		fclose( $file );
153
154		return $info;
155		}
156
157		private function readChunk( $file ) {
158		$header = fread( $file, 8 );
159		if ( strlen( $header ) < 8 ) {
160		return [ false, 0 ];
161		} else {
162		$arr = unpack( 'a4chunk/Nlength', $header );
163
164		return [ $arr['chunk'], $arr['length'] ];
165		}
166		}
167
168		private function skipChunk( $file, $chunkLength ) {
169		fseek( $file, $chunkLength, SEEK_CUR );
170
171	View Code Duplication	if ( $chunkLength & 0x01 == 1 && !feof( $file ) ) {
172		// padding byte
173		fseek( $file, 1, SEEK_CUR );
174		}
175		}
176
177		private function getMultiPageInfo( $file, $formLength ) {
178		// For now, we'll just look for the first page in the file
179		// and report its information, hoping others are the same size.
180		$start = ftell( $file );
181		do {
182		list( $chunk, $length ) = $this->readChunk( $file );
183		if ( !$chunk ) {
184		break;
185		}
186
187		if ( $chunk == 'FORM' ) {
188		$subtype = fread( $file, 4 );
189		if ( $subtype == 'DJVU' ) {
190		wfDebug( __METHOD__ . ": found first subpage\n" );
191
192		return $this->getPageInfo( $file );
193		}
194		$this->skipChunk( $file, $length - 4 );
195		} else {
196		wfDebug( __METHOD__ . ": skipping '$chunk' chunk\n" );
197		$this->skipChunk( $file, $length );
198		}
199		} while ( $length != 0 && !feof( $file ) && ftell( $file ) - $start < $formLength );
200
201		wfDebug( __METHOD__ . ": multi-page DJVU file contained no pages\n" );
202
203		return false;
204		}
205
206		private function getPageInfo( $file ) {
207		list( $chunk, $length ) = $this->readChunk( $file );
208		if ( $chunk != 'INFO' ) {
209		wfDebug( __METHOD__ . ": expected INFO chunk, got '$chunk'\n" );
210
211		return false;
212		}
213
214		if ( $length < 9 ) {
215		wfDebug( __METHOD__ . ": INFO should be 9 or 10 bytes, found $length\n" );
216
217		return false;
218		}
219		$data = fread( $file, $length );
220		if ( strlen( $data ) < $length ) {
221		wfDebug( __METHOD__ . ": INFO chunk cut off\n" );
222
223		return false;
224		}
225
226		$arr = unpack(
227		'nwidth/' .
228		'nheight/' .
229		'Cminor/' .
230		'Cmajor/' .
231		'vresolution/' .
232		'Cgamma', $data );
233
234		# Newer files have rotation info in byte 10, but we don't use it yet.
235
236		return [
237		'width' => $arr['width'],
238		'height' => $arr['height'],
239		'version' => "{$arr['major']}.{$arr['minor']}",
240		'resolution' => $arr['resolution'],
241		'gamma' => $arr['gamma'] / 10.0 ];
242		}
243
244		/**
245		* Return an XML string describing the DjVu image
246		* @return string\|bool
247		*/
248		function retrieveMetaData() {
249		global $wgDjvuToXML, $wgDjvuDump, $wgDjvuTxt;
250
251		if ( !$this->isValid() ) {
252		return false;
253		}
254
255		if ( isset( $wgDjvuDump ) ) {
256		# djvudump is faster as of version 3.5
257		# https://sourceforge.net/p/djvu/bugs/71/
258		$cmd = wfEscapeShellArg( $wgDjvuDump ) . ' ' . wfEscapeShellArg( $this->mFilename );
259		$dump = wfShellExec( $cmd );
260		$xml = $this->convertDumpToXML( $dump );
261		} elseif ( isset( $wgDjvuToXML ) ) {
262		$cmd = wfEscapeShellArg( $wgDjvuToXML ) . ' --without-anno --without-text ' .
263		wfEscapeShellArg( $this->mFilename );
264		$xml = wfShellExec( $cmd );
265		} else {
266		$xml = null;
267		}
268		# Text layer
269		if ( isset( $wgDjvuTxt ) ) {
270		$cmd = wfEscapeShellArg( $wgDjvuTxt ) . ' --detail=page ' . wfEscapeShellArg( $this->mFilename );
271		wfDebug( __METHOD__ . ": $cmd\n" );
272		$retval = '';
273		$txt = wfShellExec( $cmd, $retval, [], [ 'memory' => self::DJVUTXT_MEMORY_LIMIT ] );
274		if ( $retval == 0 ) {
275		# Strip some control characters
276		$txt = preg_replace( "/[\013\035\037]/", "", $txt );
277		$reg = <<<EOR
278		/\(page\s[\d-]\s[\d-]\s[\d-]\s[\d-]\s*"
279		((?> # Text to match is composed of atoms of either:
280		\\\\. # - any escaped character
281		\| # - any character different from " and \
282		[^"\\\\]+
283		)*?)
284		"\s*\)
285		\| # Or page can be empty ; in this case, djvutxt dumps ()
286		\(\s*()\)/sx
287		EOR;
288		$txt = preg_replace_callback( $reg, [ $this, 'pageTextCallback' ], $txt );
289		$txt = "<DjVuTxt>\n<HEAD></HEAD>\n<BODY>\n" . $txt . "</BODY>\n</DjVuTxt>\n";
290		$xml = preg_replace( "/<DjVuXML>/", "<mw-djvu><DjVuXML>", $xml, 1 );
291		$xml = $xml . $txt . '</mw-djvu>';
292		}
293		}
294
295		return $xml;
296		}
297
298		function pageTextCallback( $matches ) {
299		# Get rid of invalid UTF-8, strip control characters
300		$val = htmlspecialchars( UtfNormal\Validator::cleanUp( stripcslashes( $matches[1] ) ) );
301		$val = str_replace( [ "\n", '�' ], [ ' ', '' ], $val );
302		return '<PAGE value="' . $val . '" />';
303		}
304
305		/**
306		* Hack to temporarily work around djvutoxml bug
307		* @param string $dump
308		* @return string
309		*/
310		function convertDumpToXML( $dump ) {
311		if ( strval( $dump ) == '' ) {
312		return false;
313		}
314
315		$xml = <<<EOT
316		<?xml version="1.0" ?>
317		<!DOCTYPE DjVuXML PUBLIC "-//W3C//DTD DjVuXML 1.1//EN" "pubtext/DjVuXML-s.dtd">
318		<DjVuXML>
319		<HEAD></HEAD>
320		<BODY>
321		EOT;
322
323		$dump = str_replace( "\r", '', $dump );
324		$line = strtok( $dump, "\n" );
325		$m = false;
326		$good = false;
327		if ( preg_match( '/^( *)FORM:DJVU/', $line, $m ) ) {
328		# Single-page
329		if ( $this->parseFormDjvu( $line, $xml ) ) {
330		$good = true;
331		} else {
332		return false;
333		}
334		} elseif ( preg_match( '/^( *)FORM:DJVM/', $line, $m ) ) {
335		# Multi-page
336		$parentLevel = strlen( $m[1] );
337		# Find DIRM
338		$line = strtok( "\n" );
339		while ( $line !== false ) {
340		$childLevel = strspn( $line, ' ' );
341		if ( $childLevel <= $parentLevel ) {
342		# End of chunk
343		break;
344		}
345
346		if ( preg_match( '/^ DIRM.indirect/', $line ) ) {
347		wfDebug( "Indirect multi-page DjVu document, bad for server!\n" );
348
349		return false;
350		}
351		if ( preg_match( '/^ *FORM:DJVU/', $line ) ) {
352		# Found page
353		if ( $this->parseFormDjvu( $line, $xml ) ) {
354		$good = true;
355		} else {
356		return false;
357		}
358		}
359		$line = strtok( "\n" );
360		}
361		}
362		if ( !$good ) {
363		return false;
364		}
365
366		$xml .= "</BODY>\n</DjVuXML>\n";
367
368		return $xml;
369		}
370
371		function parseFormDjvu( $line, &$xml ) {
372		$parentLevel = strspn( $line, ' ' );
373		$line = strtok( "\n" );
374
375		# Find INFO
376		while ( $line !== false ) {
377		$childLevel = strspn( $line, ' ' );
378		if ( $childLevel <= $parentLevel ) {
379		# End of chunk
380		break;
381		}
382
383		if ( preg_match(
384		'/^ INFO \[\d\] DjVu (\d+)x(\d+), \w, (\d+) dpi, gamma=([0-9.-]+)/',
385		$line,
386		$m
387		) ) {
388		$xml .= Xml::tags(
389		'OBJECT',
390		[
391		# 'data' => '',
392		# 'type' => 'image/x.djvu',
393		'height' => $m[2],
394		'width' => $m[1],
395		# 'usemap' => '',
396		],
397		"\n" .
398		Xml::element( 'PARAM', [ 'name' => 'DPI', 'value' => $m[3] ] ) . "\n" .
399		Xml::element( 'PARAM', [ 'name' => 'GAMMA', 'value' => $m[4] ] ) . "\n"
400		) . "\n";
401
402		return true;
403		}
404		$line = strtok( "\n" );
405		}
406
407		# Not found
408		return false;
409		}
410		}
411

wikimedia / mediawiki

DjVuImage::convertDumpToXML() C last analyzed 2016-11-13 17:42 UTC

Complexity

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Duplication

Importance

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Long Method

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DjVuImage::convertDumpToXML() C
last analyzed 2016-11-13 17:42 UTC