mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/PdfHandler
synced 2024-09-24 02:39:50 +00:00
21e92330a0
* Use a nice simple PHP array instead of constructing unnecessary XML. This removes the dependency on PHP 5.1.3 for a SimpleXML method. * Tell pdfinfo to give us metadata encoded in UTF-8. If we start outputting title and creator info this will be nice! * Tell pdfinfo to give us page size information for all pages (at least through page 99999 :) rather than just the first page * Make use of that per-page size information so we can properly render pages of differing size. Without this, they get stretched or squooshed in interesting days. * Rename the pdf_no_xml message to pdf_no_metadata (in English)
120 lines
2.9 KiB
PHP
120 lines
2.9 KiB
PHP
<?php
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/**
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*
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* Copyright (C) 2007 Xarax <jodeldi@gmx.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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*/
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/**
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* inspired by djvuimage from brion vibber
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* modified and written by xarax
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*/
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class PdfImage {
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function __construct( $filename ) {
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$this->mFilename = $filename;
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}
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public function isValid() {
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return true;
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}
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public function getImageSize() {
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$data = $this->retrieveMetadata();
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$size = self::getPageSize( $data, 1 );
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if( $size ) {
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$width = $size['width'];
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$height = $size['height'];
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return array( $width, $height, 'Pdf',
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"width=\"$width\" height=\"$height\"" );
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}
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return false;
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}
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public static function getPageSize( $data, $page ) {
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global $wgPdfHandlerDpi;
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if( isset( $data['pages'][$page]['Page size'] ) ) {
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$o = $data['pages'][$page]['Page size'];
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} elseif( isset( $data['Page size'] ) ) {
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$o = $data['Page size'];
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} else {
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$o = false;
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}
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if ( $o ) {
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$size = explode( "x", $o, 2 );
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if ( $size ) {
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$width = intval( trim( $size[0] ) / 72 * $wgPdfHandlerDpi );
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$height = explode( " ", trim( $size[1] ), 2 );
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$height = intval( trim( $height[0] ) / 72 * $wgPdfHandlerDpi );
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return array(
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'width' => $width,
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'height' => $height
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);
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}
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}
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return false;
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}
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public function retrieveMetaData() {
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global $wgPdfInfo;
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if ( $wgPdfInfo ) {
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wfProfileIn( 'pdfinfo' );
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$cmd = wfEscapeShellArg( $wgPdfInfo ) .
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" -enc UTF-8 " . # Report metadata as UTF-8 text...
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" -l 9999999 " . # Report page sizes for all pages
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wfEscapeShellArg( $this->mFilename );
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$dump = wfShellExec( $cmd, $retval );
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$data = $this->convertDumpToArray( $dump );
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wfProfileOut( 'pdfinfo' );
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} else {
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$data = null;
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}
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return $data;
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}
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protected function convertDumpToArray( $dump ) {
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if ( strval( $dump ) == '' ) return false;
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$lines = explode("\n", $dump);
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$data = array();
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foreach( $lines as $line ) {
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$bits = explode( ':', $line, 2 );
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if( count( $bits ) > 1 ) {
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$key = trim( $bits[0] );
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$value = trim( $bits[1] );
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if( preg_match( '/^Page +(\d+) size$/', $key, $matches ) ) {
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$data['pages'][$matches[1]]['Page size'] = $value;
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} else {
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$data[$key] = $value;
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}
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}
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}
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return $data;
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}
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}
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