xref: /plugin/dw2pdf/action.php (revision a12c41c3b930bc6d7a584f5fe2d18b54276fda68) 
1<?php
2/**
3 * dw2Pdf Plugin: Conversion from dokuwiki content to pdf.
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Luigi Micco <l.micco@tiscali.it>
7 * @author     Andreas Gohr <andi@splitbrain.org>
8 */
9
10// must be run within Dokuwiki
11if(!defined('DOKU_INC')) die();
12
13/**
14 * Class action_plugin_dw2pdf
15 *
16 * Export hmtl content to pdf, for different url parameter configurations
17 * DokuPDF which extends mPDF is used for generating the pdf from html.
18 */
19class action_plugin_dw2pdf extends DokuWiki_Action_Plugin {
20    /**
21     * Settings for current export, collected from url param, plugin config, global config
22     *
23     * @var array
24     */
25    protected $exportConfig = null;
26    protected $tpl;
27    protected $title;
28    protected $list = array();
29    protected $onetimefile = false;
30
31    /**
32     * Constructor. Sets the correct template
33     *
34     * @param string $title
35     */
36    public function __construct($title=null) {
37        $this->tpl   = $this->getExportConfig('template');
38        $this->title = $title ? $title : '';
39    }
40
41    /**
42     * Delete cached files that were for one-time use
43     */
44    public function __destruct() {
45        if($this->onetimefile) {
46            unlink($this->onetimefile);
47        }
48    }
49
50    /**
51     * Register the events
52     *
53     * @param Doku_Event_Handler $controller
54     */
55    public function register(Doku_Event_Handler $controller) {
56        $controller->register_hook('ACTION_ACT_PREPROCESS', 'BEFORE', $this, 'convert', array());
57        $controller->register_hook('TEMPLATE_PAGETOOLS_DISPLAY', 'BEFORE', $this, 'addbutton', array());
58        $controller->register_hook('MENU_ITEMS_ASSEMBLY', 'AFTER', $this, 'addsvgbutton', array());
59    }
60
61    /**
62     * Do the HTML to PDF conversion work
63     *
64     * @param Doku_Event $event
65     */
66    public function convert(Doku_Event $event) {
67        global $ID, $REV, $DATE_AT;
68        global $conf, $INPUT;
69
70        // our event?
71        if(($event->data != 'export_pdfbook') && ($event->data != 'export_pdf') && ($event->data != 'export_pdfns')) return;
72
73        // check user's rights
74        if(auth_quickaclcheck($ID) < AUTH_READ) return;
75
76        if($data = $this->collectExportPages($event)) {
77            list($this->title, $this->list) = $data;
78        } else {
79            return;
80        }
81
82        if($event->data === 'export_pdf' && ($REV || $DATE_AT)) {
83            $cachefile = tempnam($conf['tmpdir'] . '/dwpdf', 'dw2pdf_');
84            $this->onetimefile = $cachefile;
85            $generateNewPdf = true;
86        } else {
87            // prepare cache and its dependencies
88            $depends = array();
89            $cache = $this->prepareCache($depends);
90            $cachefile = $cache->cache;
91            $generateNewPdf = !$this->getConf('usecache')
92                || $this->getExportConfig('isDebug')
93                || !$cache->useCache($depends);
94        }
95
96        // hard work only when no cache available or needed for debugging
97        if($generateNewPdf) {
98            // generating the pdf may take a long time for larger wikis / namespaces with many pages
99            set_time_limit(0);
100            try {
101                $this->generatePDF($cachefile, $event);
102            } catch(Mpdf\MpdfException $e) {
103                if($INPUT->has('selection')) {
104                    http_status(400);
105                    print $e->getMessage();
106                    exit();
107                } else {
108                    //prevent act_export()
109                    $event->data = 'show';
110                    msg($e->getMessage(), -1);
111                    $_SERVER['REQUEST_METHOD'] = 'POST'; //clears url
112                    return;
113                }
114            }
115        }
116
117        $event->preventDefault(); // after prevent, $event->data cannot be changed
118
119        // deliver the file
120        $this->sendPDFFile($cachefile);  //exits
121    }
122
123    /**
124     * Obtain list of pages and title, based on url parameters
125     *
126     * @param Doku_Event $event
127     * @return string|bool
128     */
129    protected function collectExportPages(Doku_Event $event) {
130        global $ID, $REV;
131        global $INPUT;
132        global $conf;
133
134        // list of one or multiple pages
135        $list = array();
136
137        if($event->data == 'export_pdf') {
138            $list[0] = $ID;
139            $this->title = $INPUT->str('pdftitle'); //DEPRECATED
140            $this->title = $INPUT->str('book_title', $this->title, true);
141            if(empty($this->title)) {
142                $this->title = p_get_first_heading($ID);
143            }
144
145            $filename = wikiFN($ID, $REV);
146            if(!file_exists($filename)) {
147                $this->showPageWithErrorMsg($event, 'notexist');
148                return false;
149            }
150
151        } elseif($event->data == 'export_pdfns') {
152            //check input for title and ns
153            if(!$this->title = $INPUT->str('book_title')) {
154                $this->showPageWithErrorMsg($event, 'needtitle');
155                return false;
156            }
157            $pdfnamespace = cleanID($INPUT->str('book_ns'));
158            if(!@is_dir(dirname(wikiFN($pdfnamespace . ':dummy')))) {
159                $this->showPageWithErrorMsg($event, 'needns');
160                return false;
161            }
162
163            //sort order
164            $order = $INPUT->str('book_order', 'natural', true);
165            $sortoptions = array('pagename', 'date', 'natural');
166            if(!in_array($order, $sortoptions)) {
167                $order = 'natural';
168            }
169
170            //search depth
171            $depth = $INPUT->int('book_nsdepth', 0);
172            if($depth < 0) {
173                $depth = 0;
174            }
175
176            //page search
177            $result = array();
178            $opts = array('depth' => $depth); //recursive all levels
179            $dir = utf8_encodeFN(str_replace(':', '/', $pdfnamespace));
180            search($result, $conf['datadir'], 'search_allpages', $opts, $dir);
181
182            // exclude ids
183            $excludes = $INPUT->arr('excludes');
184            if (!empty($excludes)) {
185                $result = array_filter($result, function ($item) use ($excludes) {
186                    return array_search($item['id'], $excludes) === false;
187                });
188            }
189
190            //sorting
191            if(count($result) > 0) {
192                if($order == 'date') {
193                    usort($result, array($this, '_datesort'));
194                } elseif($order == 'pagename') {
195                    usort($result, array($this, '_pagenamesort'));
196                }
197            }
198
199            foreach($result as $item) {
200                $list[] = $item['id'];
201            }
202
203            if ($pdfnamespace !== '') {
204                if (!in_array($pdfnamespace . ':' . $conf['start'], $list, true)) {
205                    if (file_exists(wikiFN(rtrim($pdfnamespace,':')))) {
206                        array_unshift($list,rtrim($pdfnamespace,':'));
207                    }
208                }
209            }
210
211        } elseif(isset($_COOKIE['list-pagelist']) && !empty($_COOKIE['list-pagelist'])) {
212            /** @deprecated  April 2016 replaced by localStorage version of Bookcreator*/
213            //is in Bookmanager of bookcreator plugin a title given?
214            $this->title = $INPUT->str('pdfbook_title'); //DEPRECATED
215            $this->title = $INPUT->str('book_title', $this->title, true);
216            if(empty($this->title)) {
217                $this->showPageWithErrorMsg($event, 'needtitle');
218                return false;
219            } else {
220                $list = explode("|", $_COOKIE['list-pagelist']);
221            }
222
223        } elseif($INPUT->has('selection')) {
224            //handle Bookcreator requests based at localStorage
225//            if(!checkSecurityToken()) {
226//                http_status(403);
227//                print $this->getLang('empty');
228//                exit();
229//            }
230
231            $json = new JSON(JSON_LOOSE_TYPE);
232            $list = $json->decode($INPUT->post->str('selection', '', true));
233            if(!is_array($list) || empty($list)) {
234                http_status(400);
235                print $this->getLang('empty');
236                exit();
237            }
238
239            $this->title = $INPUT->str('pdfbook_title'); //DEPRECATED
240            $this->title = $INPUT->str('book_title', $this->title, true);
241            if(empty($this->title)) {
242                http_status(400);
243                print $this->getLang('needtitle');
244                exit();
245            }
246
247        } else {
248            //show empty bookcreator message
249            $this->showPageWithErrorMsg($event, 'empty');
250            return false;
251        }
252
253        $list = array_map('cleanID', $list);
254
255        $skippedpages = array();
256        foreach($list as $index => $pageid) {
257            if(auth_quickaclcheck($pageid) < AUTH_READ) {
258                $skippedpages[] = $pageid;
259                unset($list[$index]);
260            }
261        }
262        $list = array_filter($list); //removes also pages mentioned '0'
263
264        //if selection contains forbidden pages throw (overridable) warning
265        if(!$INPUT->bool('book_skipforbiddenpages') && !empty($skippedpages)) {
266            $msg = hsc(join(', ', $skippedpages));
267            if($INPUT->has('selection')) {
268                http_status(400);
269                print sprintf($this->getLang('forbidden'), $msg);
270                exit();
271            } else {
272                $this->showPageWithErrorMsg($event, 'forbidden', $msg);
273                return false;
274            }
275
276        }
277
278        return array($this->title, $list);
279    }
280
281    /**
282     * Prepare cache
283     *
284     * @param array  $depends (reference) array with dependencies
285     * @return cache
286     */
287    protected function prepareCache(&$depends) {
288        global $REV;
289
290        $cachekey = join(',', $this->list)
291            . $REV
292            . $this->getExportConfig('template')
293            . $this->getExportConfig('pagesize')
294            . $this->getExportConfig('orientation')
295            . $this->getExportConfig('font-size')
296            . $this->getExportConfig('doublesided')
297            . ($this->getExportConfig('hasToC') ? join('-', $this->getExportConfig('levels')) : '0')
298            . $this->title;
299        $cache = new cache($cachekey, '.dw2.pdf');
300
301        $dependencies = array();
302        foreach($this->list as $pageid) {
303            $relations = p_get_metadata($pageid, 'relation');
304
305            if(is_array($relations)) {
306                if(array_key_exists('media', $relations) && is_array($relations['media'])) {
307                    foreach($relations['media'] as $mediaid => $exists) {
308                        if($exists) {
309                            $dependencies[] = mediaFN($mediaid);
310                        }
311                    }
312                }
313
314                if(array_key_exists('haspart', $relations) && is_array($relations['haspart'])) {
315                    foreach($relations['haspart'] as $part_pageid => $exists) {
316                        if($exists) {
317                            $dependencies[] = wikiFN($part_pageid);
318                        }
319                    }
320                }
321            }
322
323            $dependencies[] = metaFN($pageid, '.meta');
324        }
325
326        $depends['files'] = array_map('wikiFN', $this->list);
327        $depends['files'][] = __FILE__;
328        $depends['files'][] = dirname(__FILE__) . '/renderer.php';
329        $depends['files'][] = dirname(__FILE__) . '/mpdf/mpdf.php';
330        $depends['files'] = array_merge(
331            $depends['files'],
332            $dependencies,
333            getConfigFiles('main')
334        );
335        return $cache;
336    }
337
338    /**
339     * Set error notification and reload page again
340     *
341     * @param Doku_Event $event
342     * @param string $msglangkey key of translation key
343     * @param string $replacement
344     */
345    private function showPageWithErrorMsg(Doku_Event $event, $msglangkey, $replacement=null) {
346        if(empty($replacement)) {
347            $msg = $this->getLang($msglangkey);
348        } else {
349            $msg = sprintf($this->getLang($msglangkey), $replacement);
350        }
351        msg($msg, -1);
352
353        $event->data = 'show';
354        $_SERVER['REQUEST_METHOD'] = 'POST'; //clears url
355    }
356
357    /**
358     * Returns the parsed Wikitext in dw2pdf for the given id and revision
359     *
360     * @param string     $id  page id
361     * @param string|int $rev revision timestamp or empty string
362     * @param string     $date_at
363     * @return null|string
364     */
365    protected function p_wiki_dw2pdf($id, $rev = '', $date_at = '') {
366        $file = wikiFN($id, $rev);
367
368        if(!file_exists($file)) return '';
369
370        //ensure $id is in global $ID (needed for parsing)
371        global $ID;
372        $keep = $ID;
373        $ID   = $id;
374
375        if($rev || $date_at) {
376            $ret = p_render('dw2pdf', p_get_instructions(io_readWikiPage($file, $id, $rev)), $info, $date_at); //no caching on old revisions
377        } else {
378            $ret = p_cached_output($file, 'dw2pdf', $id);
379        }
380
381        //restore ID (just in case)
382        $ID = $keep;
383
384        return $ret;
385    }
386
387    /**
388     * Build a pdf from the html
389     *
390     * @param string $cachefile
391     * @param Doku_Event $event
392     */
393    protected function generatePDF($cachefile, $event) {
394        global $REV, $INPUT, $DATE_AT;
395
396        if ($event->data == 'export_pdf') { //only one page is exported
397            $rev = $REV;
398            $date_at = $DATE_AT;
399        } else { //we are exporting entre namespace, ommit revisions
400            $rev = $date_at = '';
401        }
402
403        //some shortcuts to export settings
404        $hasToC = $this->getExportConfig('hasToC');
405        $levels = $this->getExportConfig('levels');
406        $isDebug = $this->getExportConfig('isDebug');
407
408        // initialize PDF library
409        require_once(dirname(__FILE__) . "/DokuPDF.class.php");
410
411        $mpdf = new DokuPDF($this->getExportConfig('pagesize'),
412                            $this->getExportConfig('orientation'),
413                            $this->getExportConfig('font-size'));
414
415        // let mpdf fix local links
416        $self = parse_url(DOKU_URL);
417        $url = $self['scheme'] . '://' . $self['host'];
418        if($self['port']) {
419            $url .= ':' . $self['port'];
420        }
421        $mpdf->SetBasePath($url);
422
423        // Set the title
424        $mpdf->SetTitle($this->title);
425
426        // some default document settings
427        //note: double-sided document, starts at an odd page (first page is a right-hand side page)
428        //      single-side document has only odd pages
429        $mpdf->mirrorMargins = $this->getExportConfig('doublesided');
430        $mpdf->setAutoTopMargin = 'stretch';
431        $mpdf->setAutoBottomMargin = 'stretch';
432//            $mpdf->pagenumSuffix = '/'; //prefix for {nbpg}
433        if($hasToC) {
434            $mpdf->PageNumSubstitutions[] = array('from' => 1, 'reset' => 0, 'type' => 'i', 'suppress' => 'off'); //use italic pageno until ToC
435            $mpdf->h2toc = $levels;
436        } else {
437            $mpdf->PageNumSubstitutions[] = array('from' => 1, 'reset' => 0, 'type' => '1', 'suppress' => 'off');
438        }
439
440        // load the template
441        $template = $this->load_template();
442
443        // prepare HTML header styles
444        $html = '';
445        if($isDebug) {
446            $html .= '<html><head>';
447            $html .= '<style type="text/css">';
448        }
449
450        $styles = '@page { size:auto; ' . $template['page'] . '}';
451        $styles .= '@page :first {' . $template['first'] . '}';
452
453        $styles .= '@page landscape-page { size:landscape }';
454        $styles .= 'div.dw2pdf-landscape { page:landscape-page }';
455        $styles .= '@page portrait-page { size:portrait }';
456        $styles .= 'div.dw2pdf-portrait { page:portrait-page }';
457        $styles .= $this->load_css();
458
459        $mpdf->WriteHTML($styles, 1);
460
461        if($isDebug) {
462            $html .= $styles;
463            $html .= '</style>';
464            $html .= '</head><body>';
465        }
466
467        $body_start = $template['html'];
468        $body_start .= '<div class="dokuwiki">';
469
470        // insert the cover page
471        $body_start .= $template['cover'];
472
473        $mpdf->WriteHTML($body_start, 2, true, false); //start body html
474        if($isDebug) {
475            $html .= $body_start;
476        }
477        if($hasToC) {
478            //Note: - for double-sided document the ToC is always on an even number of pages, so that the following content is on a correct odd/even page
479            //      - first page of ToC starts always at odd page (so eventually an additional blank page is included before)
480            //      - there is no page numbering at the pages of the ToC
481            $mpdf->TOCpagebreakByArray(
482                array(
483                    'toc-preHTML' => '<h2>' . $this->getLang('tocheader') . '</h2>',
484                    'toc-bookmarkText' => $this->getLang('tocheader'),
485                    'links' => true,
486                    'outdent' => '1em',
487                    'resetpagenum' => true, //start pagenumbering after ToC
488                    'pagenumstyle' => '1'
489                )
490            );
491            $html .= '<tocpagebreak>';
492        }
493
494        // loop over all pages
495        $counter = 0;
496        $no_pages = count($this->list);
497        foreach($this->list as $page) {
498            $counter++;
499
500            $pagehtml = $this->p_wiki_dw2pdf($page, $rev, $date_at);
501            //file doesn't exists
502            if($pagehtml == '') {
503                continue;
504            }
505            $pagehtml .= $this->page_depend_replacements($template['cite'], $page);
506            if($counter < $no_pages) {
507                $pagehtml .= '<pagebreak />';
508            }
509
510            $mpdf->WriteHTML($pagehtml, 2, false, false); //intermediate body html
511            if($isDebug) {
512                $html .= $pagehtml;
513            }
514        }
515
516        // insert the back page
517        $body_end = $template['back'];
518
519        $body_end .= '</div>';
520
521        $mpdf->WriteHTML($body_end, 2, false, true); // finish body html
522        if($isDebug) {
523            $html .= $body_end;
524            $html .= '</body>';
525            $html .= '</html>';
526        }
527
528        //Return html for debugging
529        if($isDebug) {
530            if($INPUT->str('debughtml', 'text', true) == 'html') {
531                echo $html;
532            } else {
533                header('Content-Type: text/plain; charset=utf-8');
534                echo $html;
535            }
536            exit();
537        };
538
539        // write to cache file
540        $mpdf->Output($cachefile, 'F');
541    }
542
543    /**
544     * @param string $cachefile
545     */
546    protected function sendPDFFile($cachefile) {
547        header('Content-Type: application/pdf');
548        header('Cache-Control: must-revalidate, no-transform, post-check=0, pre-check=0');
549        header('Pragma: public');
550        http_conditionalRequest(filemtime($cachefile));
551        global $INPUT;
552        $outputTarget = $INPUT->str('outputTarget', $this->getConf('output'));
553
554        $filename = rawurlencode(cleanID(strtr($this->title, ':/;"', '    ')));
555        if($outputTarget === 'file') {
556            header('Content-Disposition: attachment; filename="' . $filename . '.pdf";');
557        } else {
558            header('Content-Disposition: inline; filename="' . $filename . '.pdf";');
559        }
560
561        //Bookcreator uses jQuery.fileDownload.js, which requires a cookie.
562        header('Set-Cookie: fileDownload=true; path=/');
563
564        //try to send file, and exit if done
565        http_sendfile($cachefile);
566
567        $fp = @fopen($cachefile, "rb");
568        if($fp) {
569            http_rangeRequest($fp, filesize($cachefile), 'application/pdf');
570        } else {
571            header("HTTP/1.0 500 Internal Server Error");
572            print "Could not read file - bad permissions?";
573        }
574        exit();
575    }
576
577    /**
578     * Load the various template files and prepare the HTML/CSS for insertion
579     *
580     * @return array
581     */
582    protected function load_template() {
583        global $ID;
584        global $conf;
585
586        // this is what we'll return
587        $output = array(
588            'cover' => '',
589            'html'  => '',
590            'page'  => '',
591            'first' => '',
592            'cite'  => '',
593        );
594
595        // prepare header/footer elements
596        $html = '';
597        foreach(array('header', 'footer') as $section) {
598            foreach(array('', '_odd', '_even', '_first') as $order) {
599                $file = DOKU_PLUGIN . 'dw2pdf/tpl/' . $this->tpl . '/' . $section . $order . '.html';
600                if(file_exists($file)) {
601                    $html .= '<htmlpage' . $section . ' name="' . $section . $order . '">' . DOKU_LF;
602                    $html .= file_get_contents($file) . DOKU_LF;
603                    $html .= '</htmlpage' . $section . '>' . DOKU_LF;
604
605                    // register the needed pseudo CSS
606                    if($order == '_first') {
607                        $output['first'] .= $section . ': html_' . $section . $order . ';' . DOKU_LF;
608                    } elseif($order == '_even') {
609                        $output['page'] .= 'even-' . $section . '-name: html_' . $section . $order . ';' . DOKU_LF;
610                    } elseif($order == '_odd') {
611                        $output['page'] .= 'odd-' . $section . '-name: html_' . $section . $order . ';' . DOKU_LF;
612                    } else {
613                        $output['page'] .= $section . ': html_' . $section . $order . ';' . DOKU_LF;
614                    }
615                }
616            }
617        }
618
619        // prepare replacements
620        $replace = array(
621            '@PAGE@'    => '{PAGENO}',
622            '@PAGES@'   => '{nbpg}', //see also $mpdf->pagenumSuffix = ' / '
623            '@TITLE@'   => hsc($this->title),
624            '@WIKI@'    => $conf['title'],
625            '@WIKIURL@' => DOKU_URL,
626            '@DATE@'    => dformat(time()),
627            '@BASE@'    => DOKU_BASE,
628            '@INC@'     => DOKU_INC,
629            '@TPLBASE@' => DOKU_BASE . 'lib/plugins/dw2pdf/tpl/' . $this->tpl . '/',
630            '@TPLINC@'  => DOKU_INC . 'lib/plugins/dw2pdf/tpl/' . $this->tpl . '/'
631        );
632
633        // set HTML element
634        $html = str_replace(array_keys($replace), array_values($replace), $html);
635        //TODO For bookcreator $ID (= bookmanager page) makes no sense
636        $output['html'] = $this->page_depend_replacements($html, $ID);
637
638        // cover page
639        $coverfile = DOKU_PLUGIN . 'dw2pdf/tpl/' . $this->tpl . '/cover.html';
640        if(file_exists($coverfile)) {
641            $output['cover'] = file_get_contents($coverfile);
642            $output['cover'] = str_replace(array_keys($replace), array_values($replace), $output['cover']);
643            $output['cover'] = $this->page_depend_replacements($output['cover'], $ID);
644            $output['cover'] .= '<pagebreak />';
645        }
646
647        // cover page
648        $backfile = DOKU_PLUGIN . 'dw2pdf/tpl/' . $this->tpl . '/back.html';
649        if(file_exists($backfile)) {
650            $output['back'] = '<pagebreak />';
651            $output['back'] .= file_get_contents($backfile);
652            $output['back'] = str_replace(array_keys($replace), array_values($replace), $output['back']);
653            $output['back'] = $this->page_depend_replacements($output['back'], $ID);
654        }
655
656        // citation box
657        $citationfile = DOKU_PLUGIN . 'dw2pdf/tpl/' . $this->tpl . '/citation.html';
658        if(file_exists($citationfile)) {
659            $output['cite'] = file_get_contents($citationfile);
660            $output['cite'] = str_replace(array_keys($replace), array_values($replace), $output['cite']);
661        }
662
663        return $output;
664    }
665
666    /**
667     * @param string $raw code with placeholders
668     * @param string $id  pageid
669     * @return string
670     */
671    protected function page_depend_replacements($raw, $id) {
672        global $REV, $DATE_AT;
673
674        // generate qr code for this page using quickchart.io (Google infographics api was deprecated in March 14, 2019)
675        $qr_code = '';
676        if($this->getConf('qrcodesize')) {
677            $url = urlencode(wl($id, '', '&', true));
678            $qr_code = '<img src="https://quickchart.io/qr?size=' .
679                $this->getConf('qrcodesize') . '&text=' . $url . '&margin=1&ecLevel=Q" />';
680        }
681        // prepare replacements
682        $replace['@ID@']      = $id;
683        $replace['@UPDATE@']  = dformat(filemtime(wikiFN($id, $REV)));
684
685        $params = array();
686        if($DATE_AT) {
687            $params['at'] = $DATE_AT;
688        } elseif($REV) {
689            $params['rev'] = $REV;
690        }
691        $replace['@PAGEURL@'] = wl($id, $params, true, "&");
692        $replace['@QRCODE@']  = $qr_code;
693
694        $content = '';
695
696        // let other plugins define their own replacements
697        $evdata = ['replace' => &$replace, 'content' => &$content];
698        $event = new Doku_Event('PLUGIN_DW2PDF_REPLACE', $evdata);
699        $event->advise_before();
700
701        $content = str_replace(array_keys($replace), array_values($replace), $raw);
702
703        // plugins may post-process HTML, e.g to clean up unused replacements
704        $event->advise_after();
705
706        // @DATE(<date>[, <format>])@
707        $content = preg_replace_callback(
708            '/@DATE\((.*?)(?:,\s*(.*?))?\)@/',
709            array($this, 'replacedate'),
710            $content
711        );
712
713        return $content;
714    }
715
716
717    /**
718     * (callback) Replace date by request datestring
719     * e.g. '%m(30-11-1975)' is replaced by '11'
720     *
721     * @param array $match with [0]=>whole match, [1]=> first subpattern, [2] => second subpattern
722     * @return string
723     */
724    function replacedate($match) {
725        global $conf;
726        //no 2nd argument for default date format
727        if($match[2] == null) {
728            $match[2] = $conf['dformat'];
729        }
730        return strftime($match[2], strtotime($match[1]));
731    }
732
733    /**
734     * Load all the style sheets and apply the needed replacements
735     */
736    protected function load_css() {
737        global $conf;
738        //reusue the CSS dispatcher functions without triggering the main function
739        define('SIMPLE_TEST', 1);
740        require_once(DOKU_INC . 'lib/exe/css.php');
741
742        // prepare CSS files
743        $files = array_merge(
744            array(
745                DOKU_INC . 'lib/styles/screen.css'
746                    => DOKU_BASE . 'lib/styles/',
747                DOKU_INC . 'lib/styles/print.css'
748                    => DOKU_BASE . 'lib/styles/',
749            ),
750            $this->css_pluginPDFstyles(),
751            array(
752                DOKU_PLUGIN . 'dw2pdf/conf/style.css'
753                    => DOKU_BASE . 'lib/plugins/dw2pdf/conf/',
754                DOKU_PLUGIN . 'dw2pdf/tpl/' . $this->tpl . '/style.css'
755                    => DOKU_BASE . 'lib/plugins/dw2pdf/tpl/' . $this->tpl . '/',
756                DOKU_PLUGIN . 'dw2pdf/conf/style.local.css'
757                    => DOKU_BASE . 'lib/plugins/dw2pdf/conf/',
758            )
759        );
760        $css = '';
761        foreach($files as $file => $location) {
762            $display = str_replace(fullpath(DOKU_INC), '', fullpath($file));
763            $css .= "\n/* XXXXXXXXX $display XXXXXXXXX */\n";
764            $css .= css_loadfile($file, $location);
765        }
766
767        if(function_exists('css_parseless')) {
768            // apply pattern replacements
769            if (function_exists('css_styleini')) {
770                // compatiblity layer for pre-Greebo releases of DokuWiki
771                $styleini = css_styleini($conf['template']);
772            } else {
773                // Greebo functionality
774                $styleUtils = new \dokuwiki\StyleUtils();
775                $styleini = $styleUtils->cssStyleini($conf['template']);
776            }
777            $css = css_applystyle($css, $styleini['replacements']);
778
779            // parse less
780            $css = css_parseless($css);
781        } else {
782            // @deprecated 2013-12-19: fix backward compatibility
783            $css = css_applystyle($css, DOKU_INC . 'lib/tpl/' . $conf['template'] . '/');
784        }
785
786        return $css;
787    }
788
789    /**
790     * Returns a list of possible Plugin PDF Styles
791     *
792     * Checks for a pdf.css, falls back to print.css
793     *
794     * @author Andreas Gohr <andi@splitbrain.org>
795     */
796    protected function css_pluginPDFstyles() {
797        $list = array();
798        $plugins = plugin_list();
799
800        $usestyle = explode(',', $this->getConf('usestyles'));
801        foreach($plugins as $p) {
802            if(in_array($p, $usestyle)) {
803                $list[DOKU_PLUGIN . "$p/screen.css"] = DOKU_BASE . "lib/plugins/$p/";
804                $list[DOKU_PLUGIN . "$p/screen.less"] = DOKU_BASE . "lib/plugins/$p/";
805
806                $list[DOKU_PLUGIN . "$p/style.css"] = DOKU_BASE . "lib/plugins/$p/";
807                $list[DOKU_PLUGIN . "$p/style.less"] = DOKU_BASE . "lib/plugins/$p/";
808            }
809
810            $list[DOKU_PLUGIN . "$p/all.css"] = DOKU_BASE . "lib/plugins/$p/";
811            $list[DOKU_PLUGIN . "$p/all.less"] = DOKU_BASE . "lib/plugins/$p/";
812
813            if(file_exists(DOKU_PLUGIN . "$p/pdf.css") || file_exists(DOKU_PLUGIN . "$p/pdf.less")) {
814                $list[DOKU_PLUGIN . "$p/pdf.css"] = DOKU_BASE . "lib/plugins/$p/";
815                $list[DOKU_PLUGIN . "$p/pdf.less"] = DOKU_BASE . "lib/plugins/$p/";
816            } else {
817                $list[DOKU_PLUGIN . "$p/print.css"] = DOKU_BASE . "lib/plugins/$p/";
818                $list[DOKU_PLUGIN . "$p/print.less"] = DOKU_BASE . "lib/plugins/$p/";
819            }
820        }
821        return $list;
822    }
823
824    /**
825     * Returns array of pages which will be included in the exported pdf
826     *
827     * @return array
828     */
829    public function getExportedPages() {
830        return $this->list;
831    }
832
833    /**
834     * usort callback to sort by file lastmodified time
835     *
836     * @param array $a
837     * @param array $b
838     * @return int
839     */
840    public function _datesort($a, $b) {
841        if($b['rev'] < $a['rev']) return -1;
842        if($b['rev'] > $a['rev']) return 1;
843        return strcmp($b['id'], $a['id']);
844    }
845
846    /**
847     * usort callback to sort by page id
848     * @param array $a
849     * @param array $b
850     * @return int
851     */
852    public function _pagenamesort($a, $b) {
853        // do not sort numbers before namespace separators
854        $aID = str_replace(':', '/', $a['id']);
855        $bID = str_replace(':', '/', $b['id']);
856        if($aID <= $bID) return -1;
857        if($aID > $bID) return 1;
858        return 0;
859    }
860
861    /**
862     * Return settings read from:
863     *   1. url parameters
864     *   2. plugin config
865     *   3. global config
866     *
867     * @return array
868     */
869    protected function loadExportConfig() {
870        global $INPUT;
871        global $conf;
872
873        $this->exportConfig = array();
874
875        // decide on the paper setup from param or config
876        $this->exportConfig['pagesize'] = $INPUT->str('pagesize', $this->getConf('pagesize'), true);
877        $this->exportConfig['orientation'] = $INPUT->str('orientation', $this->getConf('orientation'), true);
878
879        // decide on the font-size from param or config
880        $this->exportConfig['font-size'] = $INPUT->str('font-size', $this->getConf('font-size'), true);
881
882        $doublesided = $INPUT->bool('doublesided', (bool) $this->getConf('doublesided'));
883        $this->exportConfig['doublesided'] = $doublesided ? '1' : '0';
884
885        $hasToC = $INPUT->bool('toc', (bool) $this->getConf('toc'));
886        $levels = array();
887        if($hasToC) {
888            $toclevels = $INPUT->str('toclevels', $this->getConf('toclevels'), true);
889            list($top_input, $max_input) = explode('-', $toclevels, 2);
890            list($top_conf, $max_conf) = explode('-', $this->getConf('toclevels'), 2);
891            $bounds_input = array(
892                'top' => array(
893                    (int) $top_input,
894                    (int) $top_conf
895                ),
896                'max' => array(
897                    (int) $max_input,
898                    (int) $max_conf
899                )
900            );
901            $bounds = array(
902                'top' => $conf['toptoclevel'],
903                'max' => $conf['maxtoclevel']
904
905            );
906            foreach($bounds_input as $bound => $values) {
907                foreach($values as $value) {
908                    if($value > 0 && $value <= 5) {
909                        //stop at valid value and store
910                        $bounds[$bound] = $value;
911                        break;
912                    }
913                }
914            }
915
916            if($bounds['max'] < $bounds['top']) {
917                $bounds['max'] = $bounds['top'];
918            }
919
920            for($level = $bounds['top']; $level <= $bounds['max']; $level++) {
921                $levels["H$level"] = $level - 1;
922            }
923        }
924        $this->exportConfig['hasToC'] = $hasToC;
925        $this->exportConfig['levels'] = $levels;
926
927        $this->exportConfig['maxbookmarks'] = $INPUT->int('maxbookmarks', $this->getConf('maxbookmarks'), true);
928
929        $tplconf = $this->getConf('template');
930        $tpl = $INPUT->str('tpl', $tplconf, true);
931        if(!is_dir(DOKU_PLUGIN . 'dw2pdf/tpl/' . $tpl)) {
932            $tpl = $tplconf;
933        }
934        if(!$tpl){
935            $tpl = 'default';
936        }
937        $this->exportConfig['template'] = $tpl;
938
939        $this->exportConfig['isDebug'] = $conf['allowdebug'] && $INPUT->has('debughtml');
940    }
941
942    /**
943     * Returns requested config
944     *
945     * @param string $name
946     * @param mixed  $notset
947     * @return mixed|bool
948     */
949    public function getExportConfig($name, $notset = false) {
950        if ($this->exportConfig === null){
951            $this->loadExportConfig();
952        }
953
954        if(isset($this->exportConfig[$name])){
955            return $this->exportConfig[$name];
956        }else{
957            return $notset;
958        }
959    }
960
961    /**
962     * Add 'export pdf'-button to pagetools
963     *
964     * @param Doku_Event $event
965     */
966    public function addbutton(Doku_Event $event) {
967        global $ID, $REV, $DATE_AT;
968
969        if($this->getConf('showexportbutton') && $event->data['view'] == 'main') {
970            $params = array('do' => 'export_pdf');
971            if($DATE_AT) {
972                $params['at'] = $DATE_AT;
973            } elseif($REV) {
974                $params['rev'] = $REV;
975            }
976
977            // insert button at position before last (up to top)
978            $event->data['items'] = array_slice($event->data['items'], 0, -1, true) +
979                array('export_pdf' =>
980                          '<li>'
981                          . '<a href="' . wl($ID, $params) . '"  class="action export_pdf" rel="nofollow" title="' . $this->getLang('export_pdf_button') . '">'
982                          . '<span>' . $this->getLang('export_pdf_button') . '</span>'
983                          . '</a>'
984                          . '</li>'
985                ) +
986                array_slice($event->data['items'], -1, 1, true);
987        }
988    }
989
990    /**
991     * Add 'export pdf' button to page tools, new SVG based mechanism
992     *
993     * @param Doku_Event $event
994     */
995    public function addsvgbutton(Doku_Event $event) {
996        global $INFO;
997        if($event->data['view'] != 'page' || !$this->getConf('showexportbutton')) {
998            return;
999        }
1000
1001        if(!$INFO['exists']) {
1002            return;
1003        }
1004
1005        array_splice($event->data['items'], -1, 0, [new \dokuwiki\plugin\dw2pdf\MenuItem()]);
1006    }
1007}
1008