xref: /dokuwiki/inc/media.php (revision 723eeeaec752d354de90bba38d758de312da1732) 
1<?php
2/**
3 * All output and handler function needed for the media management popup
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9if(!defined('DOKU_INC')) die('meh.');
10if(!defined('NL')) define('NL',"\n");
11
12/**
13 * Lists pages which currently use a media file selected for deletion
14 *
15 * References uses the same visual as search results and share
16 * their CSS tags except pagenames won't be links.
17 *
18 * @author Matthias Grimm <matthiasgrimm@users.sourceforge.net>
19 */
20function media_filesinuse($data,$id){
21    global $lang;
22    echo '<h1>'.$lang['reference'].' <code>'.hsc(noNS($id)).'</code></h1>';
23    echo '<p>'.hsc($lang['ref_inuse']).'</p>';
24
25    $hidden=0; //count of hits without read permission
26    foreach($data as $row){
27        if(auth_quickaclcheck($row) >= AUTH_READ && isVisiblePage($row)){
28            echo '<div class="search_result">';
29            echo '<span class="mediaref_ref">'.hsc($row).'</span>';
30            echo '</div>';
31        }else
32            $hidden++;
33    }
34    if ($hidden){
35        print '<div class="mediaref_hidden">'.$lang['ref_hidden'].'</div>';
36    }
37}
38
39/**
40 * Handles the saving of image meta data
41 *
42 * @author Andreas Gohr <andi@splitbrain.org>
43 * @author Kate Arzamastseva <pshns@ukr.net>
44 */
45function media_metasave($id,$auth,$data){
46    if($auth < AUTH_UPLOAD) return false;
47    if(!checkSecurityToken()) return false;
48    global $lang;
49    global $conf;
50    $src = mediaFN($id);
51
52    $meta = new JpegMeta($src);
53    $meta->_parseAll();
54
55    foreach($data as $key => $val){
56        $val=trim($val);
57        if(empty($val)){
58            $meta->deleteField($key);
59        }else{
60            $meta->setField($key,$val);
61        }
62    }
63
64    $old = @filemtime($src);
65    if(!@file_exists(mediaFN($id, $old)) && @file_exists($src)) {
66        // add old revision to the attic
67        media_saveOldRevision($id);
68    }
69
70    if($meta->save()){
71        if($conf['fperm']) chmod($src, $conf['fperm']);
72
73        $new = @filemtime($src);
74        // add a log entry to the media changelog
75        addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, $lang['media_meta_edited']);
76
77        msg($lang['metasaveok'],1);
78        return $id;
79    }else{
80        msg($lang['metasaveerr'],-1);
81        return false;
82    }
83}
84
85/**
86 * check if a media is external source
87 *
88 * @author Gerrit Uitslag <klapinklapin@gmail.com>
89 * @param string $id the media ID or URL
90 * @return bool
91 */
92function media_isexternal($id){
93    if (preg_match('#^(?:https?|ftp)://#i', $id)) return true;
94    return false;
95}
96
97/**
98 * Check if a media item is public (eg, external URL or readable by @ALL)
99 *
100 * @author Andreas Gohr <andi@splitbrain.org>
101 * @param string $id  the media ID or URL
102 * @return bool
103 */
104function media_ispublic($id){
105    if(media_isexternal($id)) return true;
106    $id = cleanID($id);
107    if(auth_aclcheck(getNS($id).':*', '', array()) >= AUTH_READ) return true;
108    return false;
109}
110
111/**
112 * Display the form to edit image meta data
113 *
114 * @author Andreas Gohr <andi@splitbrain.org>
115 * @author Kate Arzamastseva <pshns@ukr.net>
116 */
117function media_metaform($id,$auth){
118    global $lang;
119
120    if($auth < AUTH_UPLOAD) {
121        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
122        return false;
123    }
124
125    // load the field descriptions
126    static $fields = null;
127    if(is_null($fields)){
128        $config_files = getConfigFiles('mediameta');
129        foreach ($config_files as $config_file) {
130            if(@file_exists($config_file)) include($config_file);
131        }
132    }
133
134    $src = mediaFN($id);
135
136    // output
137    $form = new Doku_Form(array('action' => media_managerURL(array('tab_details' => 'view'), '&'),
138                                'class' => 'meta'));
139    $form->addHidden('img', $id);
140    $form->addHidden('mediado', 'save');
141    foreach($fields as $key => $field){
142        // get current value
143        if (empty($field[0])) continue;
144        $tags = array($field[0]);
145        if(is_array($field[3])) $tags = array_merge($tags,$field[3]);
146        $value = tpl_img_getTag($tags,'',$src);
147        $value = cleanText($value);
148
149        // prepare attributes
150        $p = array();
151        $p['class'] = 'edit';
152        $p['id']    = 'meta__'.$key;
153        $p['name']  = 'meta['.$field[0].']';
154        $p_attrs    = array('class' => 'edit');
155
156        $form->addElement('<div class="row">');
157        if($field[2] == 'text'){
158            $form->addElement(form_makeField('text', $p['name'], $value, ($lang[$field[1]]) ? $lang[$field[1]] : $field[1] . ':', $p['id'], $p['class'], $p_attrs));
159        }else{
160            $att = buildAttributes($p);
161            $form->addElement('<label for="meta__'.$key.'">'.$lang[$field[1]].'</label>');
162            $form->addElement("<textarea $att rows=\"6\" cols=\"50\">".formText($value).'</textarea>');
163        }
164        $form->addElement('</div>'.NL);
165    }
166    $form->addElement('<div class="buttons">');
167    $form->addElement(form_makeButton('submit', '', $lang['btn_save'], array('accesskey' => 's', 'name' => 'mediado[save]')));
168    $form->addElement('</div>'.NL);
169    $form->printForm();
170
171    return true;
172}
173
174/**
175 * Convenience function to check if a media file is still in use
176 *
177 * @author Michael Klier <chi@chimeric.de>
178 */
179function media_inuse($id) {
180    global $conf;
181
182    if($conf['refcheck']){
183        $mediareferences = ft_mediause($id,true);
184        if(!count($mediareferences)) {
185            return false;
186        } else {
187            return $mediareferences;
188        }
189    } else {
190        return false;
191    }
192}
193
194define('DOKU_MEDIA_DELETED', 1);
195define('DOKU_MEDIA_NOT_AUTH', 2);
196define('DOKU_MEDIA_INUSE', 4);
197define('DOKU_MEDIA_EMPTY_NS', 8);
198
199/**
200 * Handles media file deletions
201 *
202 * If configured, checks for media references before deletion
203 *
204 * @author             Andreas Gohr <andi@splitbrain.org>
205 * @param string $id media id
206 * @param int $auth current auth check result
207 * @return int One of: 0,
208 *                     DOKU_MEDIA_DELETED,
209 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
210 *                     DOKU_MEDIA_NOT_AUTH,
211 *                     DOKU_MEDIA_INUSE
212 */
213function media_delete($id,$auth){
214    global $lang;
215    if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
216    if(media_inuse($id)) return DOKU_MEDIA_INUSE;
217
218    $file = mediaFN($id);
219
220    // trigger an event - MEDIA_DELETE_FILE
221    $data['id']   = $id;
222    $data['name'] = utf8_basename($file);
223    $data['path'] = $file;
224    $data['size'] = (@file_exists($file)) ? filesize($file) : 0;
225
226    $data['unl'] = false;
227    $data['del'] = false;
228    $evt = new Doku_Event('MEDIA_DELETE_FILE',$data);
229    if ($evt->advise_before()) {
230        $old = @filemtime($file);
231        if(!@file_exists(mediaFN($id, $old)) && @file_exists($file)) {
232            // add old revision to the attic
233            media_saveOldRevision($id);
234        }
235
236        $data['unl'] = @unlink($file);
237        if($data['unl']){
238            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted']);
239            $data['del'] = io_sweepNS($id,'mediadir');
240        }
241    }
242    $evt->advise_after();
243    unset($evt);
244
245    if($data['unl'] && $data['del']){
246        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
247    }
248
249    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
250}
251
252/**
253 * Handle file uploads via XMLHttpRequest
254 *
255 * @param string $ns target namespace
256 * @param int $auth current auth check result
257 * @return mixed false on error, id of the new file on success
258 */
259function media_upload_xhr($ns,$auth){
260    if(!checkSecurityToken()) return false;
261    global $INPUT;
262
263    $id = $INPUT->get->str('qqfile');
264    list($ext,$mime) = mimetype($id);
265    $input = fopen("php://input", "r");
266    if (!($tmp = io_mktmpdir())) return false;
267    $path = $tmp.'/'.md5($id);
268    $target = fopen($path, "w");
269    $realSize = stream_copy_to_stream($input, $target);
270    fclose($target);
271    fclose($input);
272    if (isset($_SERVER["CONTENT_LENGTH"]) && ($realSize != (int)$_SERVER["CONTENT_LENGTH"])){
273        unlink($path);
274        return false;
275    }
276
277    $res = media_save(
278        array('name' => $path,
279            'mime' => $mime,
280            'ext'  => $ext),
281        $ns.':'.$id,
282        (($INPUT->get->str('ow') == 'checked') ? true : false),
283        $auth,
284        'copy'
285    );
286    unlink($path);
287    if ($tmp) dir_delete($tmp);
288    if (is_array($res)) {
289        msg($res[0], $res[1]);
290        return false;
291    }
292    return $res;
293}
294
295/**
296 * Handles media file uploads
297 *
298 * @author Andreas Gohr <andi@splitbrain.org>
299 * @author Michael Klier <chi@chimeric.de>
300 * @param string $ns target namespace
301 * @param int $auth current auth check result
302 * @param bool|array $file $_FILES member, $_FILES['upload'] if false
303 * @return mixed false on error, id of the new file on success
304 */
305function media_upload($ns,$auth,$file=false){
306    if(!checkSecurityToken()) return false;
307    global $lang;
308    global $INPUT;
309
310    // get file and id
311    $id   = $INPUT->post->str('mediaid');
312    if (!$file) $file = $_FILES['upload'];
313    if(empty($id)) $id = $file['name'];
314
315    // check for errors (messages are done in lib/exe/mediamanager.php)
316    if($file['error']) return false;
317
318    // check extensions
319    list($fext,$fmime) = mimetype($file['name']);
320    list($iext,$imime) = mimetype($id);
321    if($fext && !$iext){
322        // no extension specified in id - read original one
323        $id   .= '.'.$fext;
324        $imime = $fmime;
325    }elseif($fext && $fext != $iext){
326        // extension was changed, print warning
327        msg(sprintf($lang['mediaextchange'],$fext,$iext));
328    }
329
330    $res = media_save(array('name' => $file['tmp_name'],
331                            'mime' => $imime,
332                            'ext'  => $iext), $ns.':'.$id,
333                      $INPUT->post->bool('ow'), $auth, 'copy_uploaded_file');
334    if (is_array($res)) {
335        msg($res[0], $res[1]);
336        return false;
337    }
338    return $res;
339}
340
341/**
342 * An alternative to move_uploaded_file that copies
343 *
344 * Using copy, makes sure any setgid bits on the media directory are honored
345 *
346 * @see   move_uploaded_file()
347 * @param string $from
348 * @param string $to
349 * @return bool
350 */
351function copy_uploaded_file($from, $to){
352    if(!is_uploaded_file($from)) return false;
353    $ok = copy($from, $to);
354    @unlink($from);
355    return $ok;
356}
357
358/**
359 * This generates an action event and delegates to _media_upload_action().
360 * Action plugins are allowed to pre/postprocess the uploaded file.
361 * (The triggered event is preventable.)
362 *
363 * Event data:
364 * $data[0]     fn_tmp: the temporary file name (read from $_FILES)
365 * $data[1]     fn: the file name of the uploaded file
366 * $data[2]     id: the future directory id of the uploaded file
367 * $data[3]     imime: the mimetype of the uploaded file
368 * $data[4]     overwrite: if an existing file is going to be overwritten
369 *
370 * @triggers MEDIA_UPLOAD_FINISH
371 */
372function media_save($file, $id, $ow, $auth, $move) {
373    if($auth < AUTH_UPLOAD) {
374        return array("You don't have permissions to upload files.", -1);
375    }
376
377    if (!isset($file['mime']) || !isset($file['ext'])) {
378        list($ext, $mime) = mimetype($id);
379        if (!isset($file['mime'])) {
380            $file['mime'] = $mime;
381        }
382        if (!isset($file['ext'])) {
383            $file['ext'] = $ext;
384        }
385    }
386
387    global $lang, $conf;
388
389    // get filename
390    $id   = cleanID($id);
391    $fn   = mediaFN($id);
392
393    // get filetype regexp
394    $types = array_keys(getMimeTypes());
395    $types = array_map(create_function('$q','return preg_quote($q,"/");'),$types);
396    $regex = join('|',$types);
397
398    // because a temp file was created already
399    if(!preg_match('/\.('.$regex.')$/i',$fn)) {
400        return array($lang['uploadwrong'],-1);
401    }
402
403    //check for overwrite
404    $overwrite = @file_exists($fn);
405    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
406    if($overwrite && (!$ow || $auth < $auth_ow)) {
407        return array($lang['uploadexist'], 0);
408    }
409    // check for valid content
410    $ok = media_contentcheck($file['name'], $file['mime']);
411    if($ok == -1){
412        return array(sprintf($lang['uploadbadcontent'],'.' . $file['ext']),-1);
413    }elseif($ok == -2){
414        return array($lang['uploadspam'],-1);
415    }elseif($ok == -3){
416        return array($lang['uploadxss'],-1);
417    }
418
419    // prepare event data
420    $data[0] = $file['name'];
421    $data[1] = $fn;
422    $data[2] = $id;
423    $data[3] = $file['mime'];
424    $data[4] = $overwrite;
425    $data[5] = $move;
426
427    // trigger event
428    return trigger_event('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
429}
430
431/**
432 * Callback adapter for media_upload_finish()
433 * @author Michael Klier <chi@chimeric.de>
434 */
435function _media_upload_action($data) {
436    // fixme do further sanity tests of given data?
437    if(is_array($data) && count($data)===6) {
438        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
439    } else {
440        return false; //callback error
441    }
442}
443
444/**
445 * Saves an uploaded media file
446 *
447 * @author Andreas Gohr <andi@splitbrain.org>
448 * @author Michael Klier <chi@chimeric.de>
449 * @author Kate Arzamastseva <pshns@ukr.net>
450 */
451function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file') {
452    global $conf;
453    global $lang;
454    global $REV;
455
456    $old = @filemtime($fn);
457    if(!@file_exists(mediaFN($id, $old)) && @file_exists($fn)) {
458        // add old revision to the attic if missing
459        media_saveOldRevision($id);
460    }
461
462    // prepare directory
463    io_createNamespace($id, 'media');
464
465    if($move($fn_tmp, $fn)) {
466        @clearstatcache(true,$fn);
467        $new = @filemtime($fn);
468        // Set the correct permission here.
469        // Always chmod media because they may be saved with different permissions than expected from the php umask.
470        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
471        chmod($fn, $conf['fmode']);
472        msg($lang['uploadsucc'],1);
473        media_notify($id,$fn,$imime,$old);
474        // add a log entry to the media changelog
475        if ($REV){
476            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_REVERT, sprintf($lang['restored'], dformat($REV)), $REV);
477        } elseif ($overwrite) {
478            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT);
479        } else {
480            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created']);
481        }
482        return $id;
483    }else{
484        return array($lang['uploadfail'],-1);
485    }
486}
487
488/**
489 * Moves the current version of media file to the media_attic
490 * directory
491 *
492 * @author Kate Arzamastseva <pshns@ukr.net>
493 * @param string $id
494 * @return int - revision date
495 */
496function media_saveOldRevision($id){
497    global $conf, $lang;
498
499    $oldf = mediaFN($id);
500    if(!@file_exists($oldf)) return '';
501    $date = filemtime($oldf);
502    if (!$conf['mediarevisions']) return $date;
503
504    $medialog = new MediaChangeLog($id);
505    if (!$medialog->getRevisionInfo($date)) {
506        // there was an external edit,
507        // there is no log entry for current version of file
508        if (!@file_exists(mediaMetaFN($id,'.changes'))) {
509            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created']);
510        } else {
511            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT);
512        }
513    }
514
515    $newf = mediaFN($id,$date);
516    io_makeFileDir($newf);
517    if(copy($oldf, $newf)) {
518        // Set the correct permission here.
519        // Always chmod media because they may be saved with different permissions than expected from the php umask.
520        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
521        chmod($newf, $conf['fmode']);
522    }
523    return $date;
524}
525
526/**
527 * This function checks if the uploaded content is really what the
528 * mimetype says it is. We also do spam checking for text types here.
529 *
530 * We need to do this stuff because we can not rely on the browser
531 * to do this check correctly. Yes, IE is broken as usual.
532 *
533 * @author Andreas Gohr <andi@splitbrain.org>
534 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
535 * @fixme  check all 26 magic IE filetypes here?
536 */
537function media_contentcheck($file,$mime){
538    global $conf;
539    if($conf['iexssprotect']){
540        $fh = @fopen($file, 'rb');
541        if($fh){
542            $bytes = fread($fh, 256);
543            fclose($fh);
544            if(preg_match('/<(script|a|img|html|body|iframe)[\s>]/i',$bytes)){
545                return -3;
546            }
547        }
548    }
549    if(substr($mime,0,6) == 'image/'){
550        $info = @getimagesize($file);
551        if($mime == 'image/gif' && $info[2] != 1){
552            return -1;
553        }elseif($mime == 'image/jpeg' && $info[2] != 2){
554            return -1;
555        }elseif($mime == 'image/png' && $info[2] != 3){
556            return -1;
557        }
558        # fixme maybe check other images types as well
559    }elseif(substr($mime,0,5) == 'text/'){
560        global $TEXT;
561        $TEXT = io_readFile($file);
562        if(checkwordblock()){
563            return -2;
564        }
565    }
566    return 0;
567}
568
569/**
570 * Send a notify mail on uploads
571 *
572 * @author Andreas Gohr <andi@splitbrain.org>
573 */
574function media_notify($id,$file,$mime,$old_rev=false){
575    global $conf;
576    if(empty($conf['notify'])) return false; //notify enabled?
577
578    $subscription = new Subscription();
579    return $subscription->send_media_diff($conf['notify'], 'uploadmail', $id, $old_rev);
580}
581
582/**
583 * List all files in a given Media namespace
584 */
585function media_filelist($ns,$auth=null,$jump='',$fullscreenview=false,$sort=false){
586    global $conf;
587    global $lang;
588    $ns = cleanID($ns);
589
590    // check auth our self if not given (needed for ajax calls)
591    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
592
593    if (!$fullscreenview) echo '<h1 id="media__ns">:'.hsc($ns).'</h1>'.NL;
594
595    if($auth < AUTH_READ){
596        // FIXME: print permission warning here instead?
597        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
598    }else{
599        if (!$fullscreenview) {
600            media_uploadform($ns, $auth);
601            media_searchform($ns);
602        }
603
604        $dir = utf8_encodeFN(str_replace(':','/',$ns));
605        $data = array();
606        search($data,$conf['mediadir'],'search_media',
607                array('showmsg'=>true,'depth'=>1),$dir,1,$sort);
608
609        if(!count($data)){
610            echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
611        }else {
612            if ($fullscreenview) {
613                echo '<ul class="' . _media_get_list_type() . '">';
614            }
615            foreach($data as $item){
616                if (!$fullscreenview) {
617                    media_printfile($item,$auth,$jump);
618                } else {
619                    media_printfile_thumbs($item,$auth,$jump);
620                }
621            }
622            if ($fullscreenview) echo '</ul>'.NL;
623        }
624    }
625}
626
627/**
628 * Prints tabs for files list actions
629 *
630 * @author Kate Arzamastseva <pshns@ukr.net>
631 * @author Adrian Lang <mail@adrianlang.de>
632 *
633 * @param string $selected_tab - opened tab
634 */
635
636function media_tabs_files($selected_tab = ''){
637    global $lang;
638    $tabs = array();
639    foreach(array('files'  => 'mediaselect',
640                  'upload' => 'media_uploadtab',
641                  'search' => 'media_searchtab') as $tab => $caption) {
642        $tabs[$tab] = array('href'    => media_managerURL(array('tab_files' => $tab), '&'),
643                            'caption' => $lang[$caption]);
644    }
645
646    html_tabs($tabs, $selected_tab);
647}
648
649/**
650 * Prints tabs for files details actions
651 *
652 * @author Kate Arzamastseva <pshns@ukr.net>
653 * @param string $image filename of the current image
654 * @param string $selected_tab opened tab
655 */
656function media_tabs_details($image, $selected_tab = ''){
657    global $lang, $conf;
658
659    $tabs = array();
660    $tabs['view'] = array('href'    => media_managerURL(array('tab_details' => 'view'), '&'),
661                          'caption' => $lang['media_viewtab']);
662
663    list(, $mime) = mimetype($image);
664    if ($mime == 'image/jpeg' && @file_exists(mediaFN($image))) {
665        $tabs['edit'] = array('href'    => media_managerURL(array('tab_details' => 'edit'), '&'),
666                              'caption' => $lang['media_edittab']);
667    }
668    if ($conf['mediarevisions']) {
669        $tabs['history'] = array('href'    => media_managerURL(array('tab_details' => 'history'), '&'),
670                                 'caption' => $lang['media_historytab']);
671    }
672
673    html_tabs($tabs, $selected_tab);
674}
675
676/**
677 * Prints options for the tab that displays a list of all files
678 *
679 * @author Kate Arzamastseva <pshns@ukr.net>
680 */
681function media_tab_files_options(){
682    global $lang;
683    global $INPUT;
684    global $ID;
685    $form = new Doku_Form(array('class' => 'options', 'method' => 'get',
686                                'action' => wl($ID)));
687    $media_manager_params = media_managerURL(array(), '', false, true);
688    foreach($media_manager_params as $pKey => $pVal){
689        $form->addHidden($pKey, $pVal);
690    }
691    $form->addHidden('sectok', null);
692    if ($INPUT->has('q')) {
693        $form->addHidden('q', $INPUT->str('q'));
694    }
695    $form->addElement('<ul>'.NL);
696    foreach(array('list' => array('listType', array('thumbs', 'rows')),
697                  'sort' => array('sortBy', array('name', 'date')))
698            as $group => $content) {
699        $checked = "_media_get_${group}_type";
700        $checked = $checked();
701
702        $form->addElement('<li class="' . $content[0] . '">');
703        foreach($content[1] as $option) {
704            $attrs = array();
705            if ($checked == $option) {
706                $attrs['checked'] = 'checked';
707            }
708            $form->addElement(form_makeRadioField($group . '_dwmedia', $option,
709                                       $lang['media_' . $group . '_' . $option],
710                                                  $content[0] . '__' . $option,
711                                                  $option, $attrs));
712        }
713        $form->addElement('</li>'.NL);
714    }
715    $form->addElement('<li>');
716    $form->addElement(form_makeButton('submit', '', $lang['btn_apply']));
717    $form->addElement('</li>'.NL);
718    $form->addElement('</ul>'.NL);
719    $form->printForm();
720}
721
722/**
723 * Returns type of sorting for the list of files in media manager
724 *
725 * @author Kate Arzamastseva <pshns@ukr.net>
726 * @return string - sort type
727 */
728function _media_get_sort_type() {
729    return _media_get_display_param('sort', array('default' => 'name', 'date'));
730}
731
732function _media_get_list_type() {
733    return _media_get_display_param('list', array('default' => 'thumbs', 'rows'));
734}
735
736function _media_get_display_param($param, $values) {
737    global $INPUT;
738    if (in_array($INPUT->str($param), $values)) {
739        // FIXME: Set cookie
740        return $INPUT->str($param);
741    } else {
742        $val = get_doku_pref($param, $values['default']);
743        if (!in_array($val, $values)) {
744            $val = $values['default'];
745        }
746        return $val;
747    }
748}
749
750/**
751 * Prints tab that displays a list of all files
752 *
753 * @author Kate Arzamastseva <pshns@ukr.net>
754 */
755function media_tab_files($ns,$auth=null,$jump='') {
756    global $lang;
757    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
758
759    if($auth < AUTH_READ){
760        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
761    }else{
762        media_filelist($ns,$auth,$jump,true,_media_get_sort_type());
763    }
764}
765
766/**
767 * Prints tab that displays uploading form
768 *
769 * @author Kate Arzamastseva <pshns@ukr.net>
770 */
771function media_tab_upload($ns,$auth=null,$jump='') {
772    global $lang;
773    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
774
775    echo '<div class="upload">'.NL;
776    if ($auth >= AUTH_UPLOAD) {
777        echo '<p>' . $lang['mediaupload'] . '</p>';
778    }
779    media_uploadform($ns, $auth, true);
780    echo '</div>'.NL;
781}
782
783/**
784 * Prints tab that displays search form
785 *
786 * @author Kate Arzamastseva <pshns@ukr.net>
787 */
788function media_tab_search($ns,$auth=null) {
789    global $INPUT;
790
791    $do = $INPUT->str('mediado');
792    $query = $INPUT->str('q');
793    echo '<div class="search">'.NL;
794
795    media_searchform($ns, $query, true);
796    if ($do == 'searchlist' || $query) {
797        media_searchlist($query,$ns,$auth,true,_media_get_sort_type());
798    }
799    echo '</div>'.NL;
800}
801
802/**
803 * Prints tab that displays mediafile details
804 *
805 * @author Kate Arzamastseva <pshns@ukr.net>
806 */
807function media_tab_view($image, $ns, $auth=null, $rev=false) {
808    global $lang;
809    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
810
811    if ($image && $auth >= AUTH_READ) {
812        $meta = new JpegMeta(mediaFN($image, $rev));
813        media_preview($image, $auth, $rev, $meta);
814        media_preview_buttons($image, $auth, $rev);
815        media_details($image, $auth, $rev, $meta);
816
817    } else {
818        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
819    }
820}
821
822/**
823 * Prints tab that displays form for editing mediafile metadata
824 *
825 * @author Kate Arzamastseva <pshns@ukr.net>
826 */
827function media_tab_edit($image, $ns, $auth=null) {
828    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
829
830    if ($image) {
831        list(, $mime) = mimetype($image);
832        if ($mime == 'image/jpeg') media_metaform($image,$auth);
833    }
834}
835
836/**
837 * Prints tab that displays mediafile revisions
838 *
839 * @author Kate Arzamastseva <pshns@ukr.net>
840 */
841function media_tab_history($image, $ns, $auth=null) {
842    global $lang;
843    global $INPUT;
844
845    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
846    $do = $INPUT->str('mediado');
847
848    if ($auth >= AUTH_READ && $image) {
849        if ($do == 'diff'){
850            media_diff($image, $ns, $auth);
851        } else {
852            $first = $INPUT->int('first');
853            html_revisions($first, $image);
854        }
855    } else {
856        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
857    }
858}
859
860/**
861 * Prints mediafile details
862 *
863 * @author Kate Arzamastseva <pshns@ukr.net>
864 */
865function media_preview($image, $auth, $rev=false, $meta=false) {
866
867    $size = media_image_preview_size($image, $rev, $meta);
868
869    if ($size) {
870        global $lang;
871        echo '<div class="image">';
872
873        $more = array();
874        if ($rev) {
875            $more['rev'] = $rev;
876        } else {
877            $t = @filemtime(mediaFN($image));
878            $more['t'] = $t;
879        }
880
881        $more['w'] = $size[0];
882        $more['h'] = $size[1];
883        $src = ml($image, $more);
884
885        echo '<a href="'.$src.'" target="_blank" title="'.$lang['mediaview'].'">';
886        echo '<img src="'.$src.'" alt="" style="max-width: '.$size[0].'px;" />';
887        echo '</a>';
888
889        echo '</div>'.NL;
890    }
891}
892
893/**
894 * Prints mediafile action buttons
895 *
896 * @author Kate Arzamastseva <pshns@ukr.net>
897 */
898function media_preview_buttons($image, $auth, $rev=false) {
899    global $lang, $conf;
900
901    echo '<ul class="actions">'.NL;
902
903    if($auth >= AUTH_DELETE && !$rev && @file_exists(mediaFN($image))){
904
905        // delete button
906        $form = new Doku_Form(array('id' => 'mediamanager__btn_delete',
907            'action'=>media_managerURL(array('delete' => $image), '&')));
908        $form->addElement(form_makeButton('submit','',$lang['btn_delete']));
909        echo '<li>';
910        $form->printForm();
911        echo '</li>'.NL;
912    }
913
914    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
915    if($auth >= $auth_ow && !$rev){
916
917        // upload new version button
918        $form = new Doku_Form(array('id' => 'mediamanager__btn_update',
919            'action'=>media_managerURL(array('image' => $image, 'mediado' => 'update'), '&')));
920        $form->addElement(form_makeButton('submit','',$lang['media_update']));
921        echo '<li>';
922        $form->printForm();
923        echo '</li>'.NL;
924    }
925
926    if($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && @file_exists(mediaFN($image, $rev))){
927
928        // restore button
929        $form = new Doku_Form(array('id' => 'mediamanager__btn_restore',
930            'action'=>media_managerURL(array('image' => $image), '&')));
931        $form->addHidden('mediado','restore');
932        $form->addHidden('rev',$rev);
933        $form->addElement(form_makeButton('submit','',$lang['media_restore']));
934        echo '<li>';
935        $form->printForm();
936        echo '</li>'.NL;
937    }
938
939    echo '</ul>'.NL;
940}
941
942/**
943 * Returns image width and height for mediamanager preview panel
944 *
945 * @author Kate Arzamastseva <pshns@ukr.net>
946 * @param string   $image
947 * @param int      $rev
948 * @param JpegMeta $meta
949 * @param int      $size
950 * @return array
951 */
952function media_image_preview_size($image, $rev, $meta, $size = 500) {
953    if (!preg_match("/\.(jpe?g|gif|png)$/", $image) || !file_exists(mediaFN($image, $rev))) return false;
954
955    $info = getimagesize(mediaFN($image, $rev));
956    $w = (int) $info[0];
957    $h = (int) $info[1];
958
959    if($meta && ($w > $size || $h > $size)){
960        $ratio = $meta->getResizeRatio($size, $size);
961        $w = floor($w * $ratio);
962        $h = floor($h * $ratio);
963    }
964    return array($w, $h);
965}
966
967/**
968 * Returns the requested EXIF/IPTC tag from the image meta
969 *
970 * @author Kate Arzamastseva <pshns@ukr.net>
971 * @param array $tags
972 * @param JpegMeta $meta
973 * @param string $alt
974 * @return string
975 */
976function media_getTag($tags,$meta,$alt=''){
977    if($meta === false) return $alt;
978    $info = $meta->getField($tags);
979    if($info == false) return $alt;
980    return $info;
981}
982
983/**
984 * Returns mediafile tags
985 *
986 * @author Kate Arzamastseva <pshns@ukr.net>
987 * @param JpegMeta $meta
988 * @return array
989 */
990function media_file_tags($meta) {
991    // load the field descriptions
992    static $fields = null;
993    if(is_null($fields)){
994        $config_files = getConfigFiles('mediameta');
995        foreach ($config_files as $config_file) {
996            if(@file_exists($config_file)) include($config_file);
997        }
998    }
999
1000    $tags = array();
1001
1002    foreach($fields as $key => $tag){
1003        $t = array();
1004        if (!empty($tag[0])) $t = array($tag[0]);
1005        if(is_array($tag[3])) $t = array_merge($t,$tag[3]);
1006        $value = media_getTag($t, $meta);
1007        $tags[] = array('tag' => $tag, 'value' => $value);
1008    }
1009
1010    return $tags;
1011}
1012
1013/**
1014 * Prints mediafile tags
1015 *
1016 * @author Kate Arzamastseva <pshns@ukr.net>
1017 */
1018function media_details($image, $auth, $rev=false, $meta=false) {
1019    global $lang;
1020
1021    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1022    $tags = media_file_tags($meta);
1023
1024    echo '<dl>'.NL;
1025    foreach($tags as $tag){
1026        if ($tag['value']) {
1027            $value = cleanText($tag['value']);
1028            echo '<dt>'.$lang[$tag['tag'][1]].':</dt><dd>';
1029            if ($tag['tag'][2] == 'date') echo dformat($value);
1030            else echo hsc($value);
1031            echo '</dd>'.NL;
1032        }
1033    }
1034    echo '</dl>'.NL;
1035}
1036
1037/**
1038 * Shows difference between two revisions of file
1039 *
1040 * @author Kate Arzamastseva <pshns@ukr.net>
1041 */
1042function media_diff($image, $ns, $auth, $fromajax = false) {
1043    global $lang;
1044    global $conf;
1045    global $INPUT;
1046
1047    if ($auth < AUTH_READ || !$image || !$conf['mediarevisions']) return '';
1048
1049    $rev1 = $INPUT->int('rev');
1050
1051    $rev2 = $INPUT->ref('rev2');
1052    if(is_array($rev2)){
1053        $rev1 = (int) $rev2[0];
1054        $rev2 = (int) $rev2[1];
1055
1056        if(!$rev1){
1057            $rev1 = $rev2;
1058            unset($rev2);
1059        }
1060    }else{
1061        $rev2 = $INPUT->int('rev2');
1062    }
1063
1064    if ($rev1 && !file_exists(mediaFN($image, $rev1))) $rev1 = false;
1065    if ($rev2 && !file_exists(mediaFN($image, $rev2))) $rev2 = false;
1066
1067    if($rev1 && $rev2){            // two specific revisions wanted
1068        // make sure order is correct (older on the left)
1069        if($rev1 < $rev2){
1070            $l_rev = $rev1;
1071            $r_rev = $rev2;
1072        }else{
1073            $l_rev = $rev2;
1074            $r_rev = $rev1;
1075        }
1076    }elseif($rev1){                // single revision given, compare to current
1077        $r_rev = '';
1078        $l_rev = $rev1;
1079    }else{                        // no revision was given, compare previous to current
1080        $r_rev = '';
1081        $medialog = new MediaChangeLog($image);
1082        $revs = $medialog->getRevisions(0, 1);
1083        if (file_exists(mediaFN($image, $revs[0]))) {
1084            $l_rev = $revs[0];
1085        } else {
1086            $l_rev = '';
1087        }
1088    }
1089
1090    // prepare event data
1091    $data[0] = $image;
1092    $data[1] = $l_rev;
1093    $data[2] = $r_rev;
1094    $data[3] = $ns;
1095    $data[4] = $auth;
1096    $data[5] = $fromajax;
1097
1098    // trigger event
1099    return trigger_event('MEDIA_DIFF', $data, '_media_file_diff', true);
1100
1101}
1102
1103function _media_file_diff($data) {
1104    if(is_array($data) && count($data)===6) {
1105        return media_file_diff($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
1106    } else {
1107        return false;
1108    }
1109}
1110
1111/**
1112 * Shows difference between two revisions of image
1113 *
1114 * @author Kate Arzamastseva <pshns@ukr.net>
1115 */
1116function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax){
1117    global $lang;
1118    global $INPUT;
1119
1120    $l_meta = new JpegMeta(mediaFN($image, $l_rev));
1121    $r_meta = new JpegMeta(mediaFN($image, $r_rev));
1122
1123    $is_img = preg_match('/\.(jpe?g|gif|png)$/', $image);
1124    if ($is_img) {
1125        $l_size = media_image_preview_size($image, $l_rev, $l_meta);
1126        $r_size = media_image_preview_size($image, $r_rev, $r_meta);
1127        $is_img = ($l_size && $r_size && ($l_size[0] >= 30 || $r_size[0] >= 30));
1128
1129        $difftype = $INPUT->str('difftype');
1130
1131        if (!$fromajax) {
1132            $form = new Doku_Form(array(
1133                'action' => media_managerURL(array(), '&'),
1134                'method' => 'get',
1135                'id' => 'mediamanager__form_diffview',
1136                'class' => 'diffView'
1137            ));
1138            $form->addHidden('sectok', null);
1139            $form->addElement('<input type="hidden" name="rev2[]" value="'.$l_rev.'" ></input>');
1140            $form->addElement('<input type="hidden" name="rev2[]" value="'.$r_rev.'" ></input>');
1141            $form->addHidden('mediado', 'diff');
1142            $form->printForm();
1143
1144            echo NL.'<div id="mediamanager__diff" >'.NL;
1145        }
1146
1147        if ($difftype == 'opacity' || $difftype == 'portions') {
1148            media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $difftype);
1149            if (!$fromajax) echo '</div>';
1150            return;
1151        }
1152    }
1153
1154    list($l_head, $r_head) = html_diff_head($l_rev, $r_rev, $image, true);
1155
1156    ?>
1157    <div class="table">
1158    <table>
1159      <tr>
1160        <th><?php echo $l_head; ?></th>
1161        <th><?php echo $r_head; ?></th>
1162      </tr>
1163    <?php
1164
1165    echo '<tr class="image">';
1166    echo '<td>';
1167    media_preview($image, $auth, $l_rev, $l_meta);
1168    echo '</td>';
1169
1170    echo '<td>';
1171    media_preview($image, $auth, $r_rev, $r_meta);
1172    echo '</td>';
1173    echo '</tr>'.NL;
1174
1175    echo '<tr class="actions">';
1176    echo '<td>';
1177    media_preview_buttons($image, $auth, $l_rev);
1178    echo '</td>';
1179
1180    echo '<td>';
1181    media_preview_buttons($image, $auth, $r_rev);
1182    echo '</td>';
1183    echo '</tr>'.NL;
1184
1185    $l_tags = media_file_tags($l_meta);
1186    $r_tags = media_file_tags($r_meta);
1187    // FIXME r_tags-only stuff
1188    foreach ($l_tags as $key => $l_tag) {
1189        if ($l_tag['value'] != $r_tags[$key]['value']) {
1190            $r_tags[$key]['highlighted'] = true;
1191            $l_tags[$key]['highlighted'] = true;
1192        } else if (!$l_tag['value'] || !$r_tags[$key]['value']) {
1193            unset($r_tags[$key]);
1194            unset($l_tags[$key]);
1195        }
1196    }
1197
1198    echo '<tr>';
1199    foreach(array($l_tags,$r_tags) as $tags){
1200        echo '<td>'.NL;
1201
1202        echo '<dl class="img_tags">';
1203        foreach($tags as $tag){
1204            $value = cleanText($tag['value']);
1205            if (!$value) $value = '-';
1206            echo '<dt>'.$lang[$tag['tag'][1]].':</dt>';
1207            echo '<dd>';
1208            if ($tag['highlighted']) {
1209                echo '<strong>';
1210            }
1211            if ($tag['tag'][2] == 'date') echo dformat($value);
1212            else echo hsc($value);
1213            if ($tag['highlighted']) {
1214                echo '</strong>';
1215            }
1216            echo '</dd>';
1217        }
1218        echo '</dl>'.NL;
1219
1220        echo '</td>';
1221    }
1222    echo '</tr>'.NL;
1223
1224    echo '</table>'.NL;
1225    echo '</div>'.NL;
1226
1227    if ($is_img && !$fromajax) echo '</div>';
1228}
1229
1230/**
1231 * Prints two images side by side
1232 * and slider
1233 *
1234 * @author Kate Arzamastseva <pshns@ukr.net>
1235 * @param string $image
1236 * @param int $l_rev
1237 * @param int $r_rev
1238 * @param array $l_size
1239 * @param array $r_size
1240 * @param string $type
1241 */
1242function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type) {
1243    if ($l_size != $r_size) {
1244        if ($r_size[0] > $l_size[0]) {
1245            $l_size = $r_size;
1246        }
1247    }
1248
1249    $l_more = array('rev' => $l_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1250    $r_more = array('rev' => $r_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1251
1252    $l_src = ml($image, $l_more);
1253    $r_src = ml($image, $r_more);
1254
1255    // slider
1256    echo '<div class="slider" style="max-width: '.($l_size[0]-20).'px;" ></div>'.NL;
1257
1258    // two images in divs
1259    echo '<div class="imageDiff ' . $type . '">'.NL;
1260    echo '<div class="image1" style="max-width: '.$l_size[0].'px;">';
1261    echo '<img src="'.$l_src.'" alt="" />';
1262    echo '</div>'.NL;
1263    echo '<div class="image2" style="max-width: '.$l_size[0].'px;">';
1264    echo '<img src="'.$r_src.'" alt="" />';
1265    echo '</div>'.NL;
1266    echo '</div>'.NL;
1267}
1268
1269/**
1270 * Restores an old revision of a media file
1271 *
1272 * @param string $image
1273 * @param int $rev
1274 * @param int $auth
1275 * @return string - file's id
1276 * @author Kate Arzamastseva <pshns@ukr.net>
1277 */
1278function media_restore($image, $rev, $auth){
1279    global $conf;
1280    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1281    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1282    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1283    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1284    list(,$imime,) = mimetype($image);
1285    $res = media_upload_finish(mediaFN($image, $rev),
1286        mediaFN($image),
1287        $image,
1288        $imime,
1289        true,
1290        'copy');
1291    if (is_array($res)) {
1292        msg($res[0], $res[1]);
1293        return false;
1294    }
1295    return $res;
1296}
1297
1298/**
1299 * List all files found by the search request
1300 *
1301 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1302 * @author Andreas Gohr <gohr@cosmocode.de>
1303 * @author Kate Arzamastseva <pshns@ukr.net>
1304 * @triggers MEDIA_SEARCH
1305 */
1306function media_searchlist($query,$ns,$auth=null,$fullscreen=false,$sort='natural'){
1307    global $conf;
1308    global $lang;
1309
1310    $ns = cleanID($ns);
1311
1312    if ($query) {
1313        $evdata = array(
1314                'ns'    => $ns,
1315                'data'  => array(),
1316                'query' => $query
1317                );
1318        $evt = new Doku_Event('MEDIA_SEARCH', $evdata);
1319        if ($evt->advise_before()) {
1320            $dir = utf8_encodeFN(str_replace(':','/',$evdata['ns']));
1321            $pattern = '/'.preg_quote($evdata['query'],'/').'/i';
1322            search($evdata['data'],
1323                    $conf['mediadir'],
1324                    'search_media',
1325                    array('showmsg'=>false,'pattern'=>$pattern),
1326                    $dir,
1327                    1,
1328                    $sort);
1329        }
1330        $evt->advise_after();
1331        unset($evt);
1332    }
1333
1334    if (!$fullscreen) {
1335        echo '<h1 id="media__ns">'.sprintf($lang['searchmedia_in'],hsc($ns).':*').'</h1>'.NL;
1336        media_searchform($ns,$query);
1337    }
1338
1339    if(!count($evdata['data'])){
1340        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
1341    }else {
1342        if ($fullscreen) {
1343            echo '<ul class="' . _media_get_list_type() . '">';
1344        }
1345        foreach($evdata['data'] as $item){
1346            if (!$fullscreen) media_printfile($item,$item['perm'],'',true);
1347            else media_printfile_thumbs($item,$item['perm'],false,true);
1348        }
1349        if ($fullscreen) echo '</ul>'.NL;
1350    }
1351}
1352
1353/**
1354 * Formats and prints one file in the list
1355 */
1356function media_printfile($item,$auth,$jump,$display_namespace=false){
1357    global $lang;
1358    global $conf;
1359
1360    // Prepare zebra coloring
1361    // I always wanted to use this variable name :-D
1362    static $twibble = 1;
1363    $twibble *= -1;
1364    $zebra = ($twibble == -1) ? 'odd' : 'even';
1365
1366    // Automatically jump to recent action
1367    if($jump == $item['id']) {
1368        $jump = ' id="scroll__here" ';
1369    }else{
1370        $jump = '';
1371    }
1372
1373    // Prepare fileicons
1374    list($ext) = mimetype($item['file'],false);
1375    $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
1376    $class = 'select mediafile mf_'.$class;
1377
1378    // Prepare filename
1379    $file = utf8_decodeFN($item['file']);
1380
1381    // Prepare info
1382    $info = '';
1383    if($item['isimg']){
1384        $info .= (int) $item['meta']->getField('File.Width');
1385        $info .= '&#215;';
1386        $info .= (int) $item['meta']->getField('File.Height');
1387        $info .= ' ';
1388    }
1389    $info .= '<i>'.dformat($item['mtime']).'</i>';
1390    $info .= ' ';
1391    $info .= filesize_h($item['size']);
1392
1393    // output
1394    echo '<div class="'.$zebra.'"'.$jump.' title="'.hsc($item['id']).'">'.NL;
1395    if (!$display_namespace) {
1396        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($file).'</a> ';
1397    } else {
1398        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($item['id']).'</a><br/>';
1399    }
1400    echo '<span class="info">('.$info.')</span>'.NL;
1401
1402    // view button
1403    $link = ml($item['id'],'',true);
1404    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/magnifier.png" '.
1405        'alt="'.$lang['mediaview'].'" title="'.$lang['mediaview'].'" class="btn" /></a>';
1406
1407    // mediamanager button
1408    $link = wl('',array('do'=>'media','image'=>$item['id'],'ns'=>getNS($item['id'])));
1409    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/mediamanager.png" '.
1410        'alt="'.$lang['btn_media'].'" title="'.$lang['btn_media'].'" class="btn" /></a>';
1411
1412    // delete button
1413    if($item['writable'] && $auth >= AUTH_DELETE){
1414        $link = DOKU_BASE.'lib/exe/mediamanager.php?delete='.rawurlencode($item['id']).
1415            '&amp;sectok='.getSecurityToken();
1416        echo ' <a href="'.$link.'" class="btn_media_delete" title="'.$item['id'].'">'.
1417            '<img src="'.DOKU_BASE.'lib/images/trash.png" alt="'.$lang['btn_delete'].'" '.
1418            'title="'.$lang['btn_delete'].'" class="btn" /></a>';
1419    }
1420
1421    echo '<div class="example" id="ex_'.str_replace(':','_',$item['id']).'">';
1422    echo $lang['mediausage'].' <code>{{:'.$item['id'].'}}</code>';
1423    echo '</div>';
1424    if($item['isimg']) media_printimgdetail($item);
1425    echo '<div class="clearer"></div>'.NL;
1426    echo '</div>'.NL;
1427}
1428
1429function media_printicon($filename){
1430    list($ext) = mimetype(mediaFN($filename),false);
1431
1432    if (@file_exists(DOKU_INC.'lib/images/fileicons/'.$ext.'.png')) {
1433        $icon = DOKU_BASE.'lib/images/fileicons/'.$ext.'.png';
1434    } else {
1435        $icon = DOKU_BASE.'lib/images/fileicons/file.png';
1436    }
1437
1438    return '<img src="'.$icon.'" alt="'.$filename.'" class="icon" />';
1439
1440}
1441
1442/**
1443 * Formats and prints one file in the list in the thumbnails view
1444 *
1445 * @author Kate Arzamastseva <pshns@ukr.net>
1446 */
1447function media_printfile_thumbs($item,$auth,$jump=false,$display_namespace=false){
1448
1449    // Prepare filename
1450    $file = utf8_decodeFN($item['file']);
1451
1452    // output
1453    echo '<li><dl title="'.hsc($item['id']).'">'.NL;
1454
1455        echo '<dt>';
1456    if($item['isimg']) {
1457        media_printimgdetail($item, true);
1458
1459    } else {
1460        echo '<a id="d_:'.$item['id'].'" class="image" title="'.$item['id'].'" href="'.
1461            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1462            'tab_details' => 'view')).'">';
1463        echo media_printicon($item['id']);
1464        echo '</a>';
1465    }
1466    echo '</dt>'.NL;
1467    if (!$display_namespace) {
1468        $name = hsc($file);
1469    } else {
1470        $name = hsc($item['id']);
1471    }
1472    echo '<dd class="name"><a href="'.media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1473        'tab_details' => 'view')).'" id="h_:'.$item['id'].'">'.$name.'</a></dd>'.NL;
1474
1475    if($item['isimg']){
1476        $size = '';
1477        $size .= (int) $item['meta']->getField('File.Width');
1478        $size .= '&#215;';
1479        $size .= (int) $item['meta']->getField('File.Height');
1480        echo '<dd class="size">'.$size.'</dd>'.NL;
1481    } else {
1482        echo '<dd class="size">&#160;</dd>'.NL;
1483    }
1484    $date = dformat($item['mtime']);
1485    echo '<dd class="date">'.$date.'</dd>'.NL;
1486    $filesize = filesize_h($item['size']);
1487    echo '<dd class="filesize">'.$filesize.'</dd>'.NL;
1488    echo '</dl></li>'.NL;
1489}
1490
1491/**
1492 * Prints a thumbnail and metainfo
1493 */
1494function media_printimgdetail($item, $fullscreen=false){
1495    // prepare thumbnail
1496    $size = $fullscreen ? 90 : 120;
1497
1498    $w = (int) $item['meta']->getField('File.Width');
1499    $h = (int) $item['meta']->getField('File.Height');
1500    if($w>$size || $h>$size){
1501        if (!$fullscreen) {
1502            $ratio = $item['meta']->getResizeRatio($size);
1503        } else {
1504            $ratio = $item['meta']->getResizeRatio($size,$size);
1505        }
1506        $w = floor($w * $ratio);
1507        $h = floor($h * $ratio);
1508    }
1509    $src = ml($item['id'],array('w'=>$w,'h'=>$h,'t'=>$item['mtime']));
1510    $p = array();
1511    if (!$fullscreen) {
1512        // In fullscreen mediamanager view, image resizing is done via CSS.
1513        $p['width']  = $w;
1514        $p['height'] = $h;
1515    }
1516    $p['alt']    = $item['id'];
1517    $att = buildAttributes($p);
1518
1519    // output
1520    if ($fullscreen) {
1521        echo '<a id="l_:'.$item['id'].'" class="image thumb" href="'.
1522            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']), 'tab_details' => 'view')).'">';
1523        echo '<img src="'.$src.'" '.$att.' />';
1524        echo '</a>';
1525    }
1526
1527    if ($fullscreen) return;
1528
1529    echo '<div class="detail">';
1530    echo '<div class="thumb">';
1531    echo '<a id="d_:'.$item['id'].'" class="select">';
1532    echo '<img src="'.$src.'" '.$att.' />';
1533    echo '</a>';
1534    echo '</div>';
1535
1536    // read EXIF/IPTC data
1537    $t = $item['meta']->getField(array('IPTC.Headline','xmp.dc:title'));
1538    $d = $item['meta']->getField(array('IPTC.Caption','EXIF.UserComment',
1539                'EXIF.TIFFImageDescription',
1540                'EXIF.TIFFUserComment'));
1541    if(utf8_strlen($d) > 250) $d = utf8_substr($d,0,250).'...';
1542    $k = $item['meta']->getField(array('IPTC.Keywords','IPTC.Category','xmp.dc:subject'));
1543
1544    // print EXIF/IPTC data
1545    if($t || $d || $k ){
1546        echo '<p>';
1547        if($t) echo '<strong>'.htmlspecialchars($t).'</strong><br />';
1548        if($d) echo htmlspecialchars($d).'<br />';
1549        if($t) echo '<em>'.htmlspecialchars($k).'</em>';
1550        echo '</p>';
1551    }
1552    echo '</div>';
1553}
1554
1555/**
1556 * Build link based on the current, adding/rewriting
1557 * parameters
1558 *
1559 * @author Kate Arzamastseva <pshns@ukr.net>
1560 * @param array|bool $params
1561 * @param string     $amp - separator
1562 * @param bool       $abs
1563 * @param bool       $params_array
1564 * @return string - link
1565 */
1566function media_managerURL($params=false, $amp='&amp;', $abs=false, $params_array=false) {
1567    global $ID;
1568    global $INPUT;
1569
1570    $gets = array('do' => 'media');
1571    $media_manager_params = array('tab_files', 'tab_details', 'image', 'ns', 'list', 'sort');
1572    foreach ($media_manager_params as $x) {
1573        if ($INPUT->has($x)) $gets[$x] = $INPUT->str($x);
1574    }
1575
1576    if ($params) {
1577        $gets = $params + $gets;
1578    }
1579    unset($gets['id']);
1580    if (isset($gets['delete'])) {
1581        unset($gets['image']);
1582        unset($gets['tab_details']);
1583    }
1584
1585    if ($params_array) return $gets;
1586
1587    return wl($ID,$gets,$abs,$amp);
1588}
1589
1590/**
1591 * Print the media upload form if permissions are correct
1592 *
1593 * @author Andreas Gohr <andi@splitbrain.org>
1594 * @author Kate Arzamastseva <pshns@ukr.net>
1595 */
1596function media_uploadform($ns, $auth, $fullscreen = false){
1597    global $lang;
1598    global $conf;
1599    global $INPUT;
1600
1601    if($auth < AUTH_UPLOAD) {
1602        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
1603        return;
1604    }
1605    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1606
1607    $update = false;
1608    $id = '';
1609    if ($auth >= $auth_ow && $fullscreen && $INPUT->str('mediado') == 'update') {
1610        $update = true;
1611        $id = cleanID($INPUT->str('image'));
1612    }
1613
1614    // The default HTML upload form
1615    $params = array('id'      => 'dw__upload',
1616                    'enctype' => 'multipart/form-data');
1617    if (!$fullscreen) {
1618        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1619    } else {
1620        $params['action'] = media_managerURL(array('tab_files' => 'files',
1621            'tab_details' => 'view'), '&');
1622    }
1623
1624    $form = new Doku_Form($params);
1625    if (!$fullscreen) echo '<div class="upload">' . $lang['mediaupload'] . '</div>';
1626    $form->addElement(formSecurityToken());
1627    $form->addHidden('ns', hsc($ns));
1628    $form->addElement(form_makeOpenTag('p'));
1629    $form->addElement(form_makeFileField('upload', $lang['txt_upload'].':', 'upload__file'));
1630    $form->addElement(form_makeCloseTag('p'));
1631    $form->addElement(form_makeOpenTag('p'));
1632    $form->addElement(form_makeTextField('mediaid', noNS($id), $lang['txt_filename'].':', 'upload__name'));
1633    $form->addElement(form_makeButton('submit', '', $lang['btn_upload']));
1634    $form->addElement(form_makeCloseTag('p'));
1635
1636    if($auth >= $auth_ow){
1637        $form->addElement(form_makeOpenTag('p'));
1638        $attrs = array();
1639        if ($update) $attrs['checked'] = 'checked';
1640        $form->addElement(form_makeCheckboxField('ow', 1, $lang['txt_overwrt'], 'dw__ow', 'check', $attrs));
1641        $form->addElement(form_makeCloseTag('p'));
1642    }
1643
1644    echo NL.'<div id="mediamanager__uploader">'.NL;
1645    html_form('upload', $form);
1646
1647    echo '</div>'.NL;
1648
1649    echo '<p class="maxsize">';
1650    printf($lang['maxuploadsize'],filesize_h(media_getuploadsize()));
1651    echo '</p>'.NL;
1652
1653}
1654
1655/**
1656 * Returns the size uploaded files may have
1657 *
1658 * This uses a conservative approach using the lowest number found
1659 * in any of the limiting ini settings
1660 *
1661 * @returns int size in bytes
1662 */
1663function media_getuploadsize(){
1664    $okay = 0;
1665
1666    $post = (int) php_to_byte(@ini_get('post_max_size'));
1667    $suho = (int) php_to_byte(@ini_get('suhosin.post.max_value_length'));
1668    $upld = (int) php_to_byte(@ini_get('upload_max_filesize'));
1669
1670    if($post && ($post < $okay || $okay == 0)) $okay = $post;
1671    if($suho && ($suho < $okay || $okay == 0)) $okay = $suho;
1672    if($upld && ($upld < $okay || $okay == 0)) $okay = $upld;
1673
1674    return $okay;
1675}
1676
1677/**
1678 * Print the search field form
1679 *
1680 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1681 * @author Kate Arzamastseva <pshns@ukr.net>
1682 */
1683function media_searchform($ns,$query='',$fullscreen=false){
1684    global $lang;
1685
1686    // The default HTML search form
1687    $params = array('id' => 'dw__mediasearch');
1688    if (!$fullscreen) {
1689        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1690    } else {
1691        $params['action'] = media_managerURL(array(), '&');
1692    }
1693    $form = new Doku_Form($params);
1694    $form->addHidden('ns', $ns);
1695    $form->addHidden($fullscreen ? 'mediado' : 'do', 'searchlist');
1696
1697    if (!$fullscreen) $form->addElement('<div class="upload">' . $lang['mediasearch'] . '</div>'.NL);
1698    $form->addElement(form_makeOpenTag('p'));
1699    $form->addElement(form_makeTextField('q', $query,$lang['searchmedia'],'','',array('title'=>sprintf($lang['searchmedia_in'],hsc($ns).':*'))));
1700    $form->addElement(form_makeButton('submit', '', $lang['btn_search']));
1701    $form->addElement(form_makeCloseTag('p'));
1702    html_form('searchmedia', $form);
1703}
1704
1705/**
1706 * Build a tree outline of available media namespaces
1707 *
1708 * @author Andreas Gohr <andi@splitbrain.org>
1709 */
1710function media_nstree($ns){
1711    global $conf;
1712    global $lang;
1713
1714    // currently selected namespace
1715    $ns  = cleanID($ns);
1716    if(empty($ns)){
1717        global $ID;
1718        $ns = (string)getNS($ID);
1719    }
1720
1721    $ns_dir  = utf8_encodeFN(str_replace(':','/',$ns));
1722
1723    $data = array();
1724    search($data,$conf['mediadir'],'search_index',array('ns' => $ns_dir, 'nofiles' => true));
1725
1726    // wrap a list with the root level around the other namespaces
1727    array_unshift($data, array('level' => 0, 'id' => '', 'open' =>'true',
1728                               'label' => '['.$lang['mediaroot'].']'));
1729
1730    // insert the current ns into the hierarchy if it isn't already part of it
1731    $ns_parts = explode(':', $ns);
1732    $tmp_ns = '';
1733    $pos = 0;
1734    foreach ($ns_parts as $level => $part) {
1735        if ($tmp_ns) $tmp_ns .= ':'.$part;
1736        else $tmp_ns = $part;
1737
1738        // find the namespace parts or insert them
1739        while ($data[$pos]['id'] != $tmp_ns) {
1740            if ($pos >= count($data) || ($data[$pos]['level'] <= $level+1 && strnatcmp(utf8_encodeFN($data[$pos]['id']), utf8_encodeFN($tmp_ns)) > 0)) {
1741                array_splice($data, $pos, 0, array(array('level' => $level+1, 'id' => $tmp_ns, 'open' => 'true')));
1742                break;
1743            }
1744            ++$pos;
1745        }
1746    }
1747
1748    echo html_buildlist($data,'idx','media_nstree_item','media_nstree_li');
1749}
1750
1751/**
1752 * Userfunction for html_buildlist
1753 *
1754 * Prints a media namespace tree item
1755 *
1756 * @author Andreas Gohr <andi@splitbrain.org>
1757 */
1758function media_nstree_item($item){
1759    global $INPUT;
1760    $pos   = strrpos($item['id'], ':');
1761    $label = substr($item['id'], $pos > 0 ? $pos + 1 : 0);
1762    if(!$item['label']) $item['label'] = $label;
1763
1764    $ret  = '';
1765    if (!($INPUT->str('do') == 'media'))
1766    $ret .= '<a href="'.DOKU_BASE.'lib/exe/mediamanager.php?ns='.idfilter($item['id']).'" class="idx_dir">';
1767    else $ret .= '<a href="'.media_managerURL(array('ns' => idfilter($item['id'], false), 'tab_files' => 'files'))
1768        .'" class="idx_dir">';
1769    $ret .= $item['label'];
1770    $ret .= '</a>';
1771    return $ret;
1772}
1773
1774/**
1775 * Userfunction for html_buildlist
1776 *
1777 * Prints a media namespace tree item opener
1778 *
1779 * @author Andreas Gohr <andi@splitbrain.org>
1780 */
1781function media_nstree_li($item){
1782    $class='media level'.$item['level'];
1783    if($item['open']){
1784        $class .= ' open';
1785        $img   = DOKU_BASE.'lib/images/minus.gif';
1786        $alt   = '−';
1787    }else{
1788        $class .= ' closed';
1789        $img   = DOKU_BASE.'lib/images/plus.gif';
1790        $alt   = '+';
1791    }
1792    // TODO: only deliver an image if it actually has a subtree...
1793    return '<li class="'.$class.'">'.
1794        '<img src="'.$img.'" alt="'.$alt.'" />';
1795}
1796
1797/**
1798 * Resizes the given image to the given size
1799 *
1800 * @author  Andreas Gohr <andi@splitbrain.org>
1801 */
1802function media_resize_image($file, $ext, $w, $h=0){
1803    global $conf;
1804
1805    $info = @getimagesize($file); //get original size
1806    if($info == false) return $file; // that's no image - it's a spaceship!
1807
1808    if(!$h) $h = round(($w * $info[1]) / $info[0]);
1809    if(!$w) $w = round(($h * $info[0]) / $info[1]);
1810
1811    // we wont scale up to infinity
1812    if($w > 2000 || $h > 2000) return $file;
1813
1814    // resize necessary? - (w,h) = native dimensions
1815    if(($w == $info[0]) && ($h == $info[1])) return $file;
1816
1817    //cache
1818    $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
1819    $mtime = @filemtime($local); // 0 if not exists
1820
1821    if( $mtime > filemtime($file) ||
1822            media_resize_imageIM($ext,$file,$info[0],$info[1],$local,$w,$h) ||
1823            media_resize_imageGD($ext,$file,$info[0],$info[1],$local,$w,$h) ){
1824        if($conf['fperm']) @chmod($local, $conf['fperm']);
1825        return $local;
1826    }
1827    //still here? resizing failed
1828    return $file;
1829}
1830
1831/**
1832 * Crops the given image to the wanted ratio, then calls media_resize_image to scale it
1833 * to the wanted size
1834 *
1835 * Crops are centered horizontally but prefer the upper third of an vertical
1836 * image because most pics are more interesting in that area (rule of thirds)
1837 *
1838 * @author  Andreas Gohr <andi@splitbrain.org>
1839 */
1840function media_crop_image($file, $ext, $w, $h=0){
1841    global $conf;
1842
1843    if(!$h) $h = $w;
1844    $info = @getimagesize($file); //get original size
1845    if($info == false) return $file; // that's no image - it's a spaceship!
1846
1847    // calculate crop size
1848    $fr = $info[0]/$info[1];
1849    $tr = $w/$h;
1850
1851    // check if the crop can be handled completely by resize,
1852    // i.e. the specified width & height match the aspect ratio of the source image
1853    if ($w == round($h*$fr)) {
1854        return media_resize_image($file, $ext, $w);
1855    }
1856
1857    if($tr >= 1){
1858        if($tr > $fr){
1859            $cw = $info[0];
1860            $ch = (int) ($info[0]/$tr);
1861        }else{
1862            $cw = (int) ($info[1]*$tr);
1863            $ch = $info[1];
1864        }
1865    }else{
1866        if($tr < $fr){
1867            $cw = (int) ($info[1]*$tr);
1868            $ch = $info[1];
1869        }else{
1870            $cw = $info[0];
1871            $ch = (int) ($info[0]/$tr);
1872        }
1873    }
1874    // calculate crop offset
1875    $cx = (int) (($info[0]-$cw)/2);
1876    $cy = (int) (($info[1]-$ch)/3);
1877
1878    //cache
1879    $local = getCacheName($file,'.media.'.$cw.'x'.$ch.'.crop.'.$ext);
1880    $mtime = @filemtime($local); // 0 if not exists
1881
1882    if( $mtime > @filemtime($file) ||
1883            media_crop_imageIM($ext,$file,$info[0],$info[1],$local,$cw,$ch,$cx,$cy) ||
1884            media_resize_imageGD($ext,$file,$cw,$ch,$local,$cw,$ch,$cx,$cy) ){
1885        if($conf['fperm']) @chmod($local, $conf['fperm']);
1886        return media_resize_image($local,$ext, $w, $h);
1887    }
1888
1889    //still here? cropping failed
1890    return media_resize_image($file,$ext, $w, $h);
1891}
1892
1893/**
1894 * Calculate a token to be used to verify fetch requests for resized or
1895 * cropped images have been internally generated - and prevent external
1896 * DDOS attacks via fetch
1897 *
1898 * @author Christopher Smith <chris@jalakai.co.uk>
1899 *
1900 * @param string  $id    id of the image
1901 * @param int     $w     resize/crop width
1902 * @param int     $h     resize/crop height
1903 * @return string
1904 */
1905function media_get_token($id,$w,$h){
1906    // token is only required for modified images
1907    if ($w || $h || media_isexternal($id)) {
1908        $token = $id;
1909        if ($w) $token .= '.'.$w;
1910        if ($h) $token .= '.'.$h;
1911
1912        return substr(PassHash::hmac('md5', $token, auth_cookiesalt()),0,6);
1913    }
1914
1915    return '';
1916}
1917
1918/**
1919 * Download a remote file and return local filename
1920 *
1921 * returns false if download fails. Uses cached file if available and
1922 * wanted
1923 *
1924 * @author  Andreas Gohr <andi@splitbrain.org>
1925 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
1926 */
1927function media_get_from_URL($url,$ext,$cache){
1928    global $conf;
1929
1930    // if no cache or fetchsize just redirect
1931    if ($cache==0)           return false;
1932    if (!$conf['fetchsize']) return false;
1933
1934    $local = getCacheName(strtolower($url),".media.$ext");
1935    $mtime = @filemtime($local); // 0 if not exists
1936
1937    //decide if download needed:
1938    if( ($mtime == 0) ||                           // cache does not exist
1939            ($cache != -1 && $mtime < time()-$cache)   // 'recache' and cache has expired
1940      ){
1941        if(media_image_download($url,$local)){
1942            return $local;
1943        }else{
1944            return false;
1945        }
1946    }
1947
1948    //if cache exists use it else
1949    if($mtime) return $local;
1950
1951    //else return false
1952    return false;
1953}
1954
1955/**
1956 * Download image files
1957 *
1958 * @author Andreas Gohr <andi@splitbrain.org>
1959 */
1960function media_image_download($url,$file){
1961    global $conf;
1962    $http = new DokuHTTPClient();
1963    $http->keep_alive = false; // we do single ops here, no need for keep-alive
1964
1965    $http->max_bodysize = $conf['fetchsize'];
1966    $http->timeout = 25; //max. 25 sec
1967    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
1968
1969    $data = $http->get($url);
1970    if(!$data) return false;
1971
1972    $fileexists = @file_exists($file);
1973    $fp = @fopen($file,"w");
1974    if(!$fp) return false;
1975    fwrite($fp,$data);
1976    fclose($fp);
1977    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
1978
1979    // check if it is really an image
1980    $info = @getimagesize($file);
1981    if(!$info){
1982        @unlink($file);
1983        return false;
1984    }
1985
1986    return true;
1987}
1988
1989/**
1990 * resize images using external ImageMagick convert program
1991 *
1992 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
1993 * @author Andreas Gohr <andi@splitbrain.org>
1994 */
1995function media_resize_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
1996    global $conf;
1997
1998    // check if convert is configured
1999    if(!$conf['im_convert']) return false;
2000
2001    // prepare command
2002    $cmd  = $conf['im_convert'];
2003    $cmd .= ' -resize '.$to_w.'x'.$to_h.'!';
2004    if ($ext == 'jpg' || $ext == 'jpeg') {
2005        $cmd .= ' -quality '.$conf['jpg_quality'];
2006    }
2007    $cmd .= " $from $to";
2008
2009    @exec($cmd,$out,$retval);
2010    if ($retval == 0) return true;
2011    return false;
2012}
2013
2014/**
2015 * crop images using external ImageMagick convert program
2016 *
2017 * @author Andreas Gohr <andi@splitbrain.org>
2018 */
2019function media_crop_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x,$ofs_y){
2020    global $conf;
2021
2022    // check if convert is configured
2023    if(!$conf['im_convert']) return false;
2024
2025    // prepare command
2026    $cmd  = $conf['im_convert'];
2027    $cmd .= ' -crop '.$to_w.'x'.$to_h.'+'.$ofs_x.'+'.$ofs_y;
2028    if ($ext == 'jpg' || $ext == 'jpeg') {
2029        $cmd .= ' -quality '.$conf['jpg_quality'];
2030    }
2031    $cmd .= " $from $to";
2032
2033    @exec($cmd,$out,$retval);
2034    if ($retval == 0) return true;
2035    return false;
2036}
2037
2038/**
2039 * resize or crop images using PHP's libGD support
2040 *
2041 * @author Andreas Gohr <andi@splitbrain.org>
2042 * @author Sebastian Wienecke <s_wienecke@web.de>
2043 */
2044function media_resize_imageGD($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x=0,$ofs_y=0){
2045    global $conf;
2046
2047    if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2048
2049    // check available memory
2050    if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){
2051        return false;
2052    }
2053
2054    // create an image of the given filetype
2055    if ($ext == 'jpg' || $ext == 'jpeg'){
2056        if(!function_exists("imagecreatefromjpeg")) return false;
2057        $image = @imagecreatefromjpeg($from);
2058    }elseif($ext == 'png') {
2059        if(!function_exists("imagecreatefrompng")) return false;
2060        $image = @imagecreatefrompng($from);
2061
2062    }elseif($ext == 'gif') {
2063        if(!function_exists("imagecreatefromgif")) return false;
2064        $image = @imagecreatefromgif($from);
2065    }
2066    if(!$image) return false;
2067
2068    if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
2069        $newimg = @imagecreatetruecolor ($to_w, $to_h);
2070    }
2071    if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
2072    if(!$newimg){
2073        imagedestroy($image);
2074        return false;
2075    }
2076
2077    //keep png alpha channel if possible
2078    if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
2079        imagealphablending($newimg, false);
2080        imagesavealpha($newimg,true);
2081    }
2082
2083    //keep gif transparent color if possible
2084    if($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2085        if(function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2086            $transcolorindex = @imagecolortransparent($image);
2087            if($transcolorindex >= 0 ) { //transparent color exists
2088                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2089                $transcolorindex = @imagecolorallocate($newimg, $transcolor['red'], $transcolor['green'], $transcolor['blue']);
2090                @imagefill($newimg, 0, 0, $transcolorindex);
2091                @imagecolortransparent($newimg, $transcolorindex);
2092            }else{ //filling with white
2093                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2094                @imagefill($newimg, 0, 0, $whitecolorindex);
2095            }
2096        }else{ //filling with white
2097            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2098            @imagefill($newimg, 0, 0, $whitecolorindex);
2099        }
2100    }
2101
2102    //try resampling first
2103    if(function_exists("imagecopyresampled")){
2104        if(!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2105            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2106        }
2107    }else{
2108        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2109    }
2110
2111    $okay = false;
2112    if ($ext == 'jpg' || $ext == 'jpeg'){
2113        if(!function_exists('imagejpeg')){
2114            $okay = false;
2115        }else{
2116            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2117        }
2118    }elseif($ext == 'png') {
2119        if(!function_exists('imagepng')){
2120            $okay = false;
2121        }else{
2122            $okay =  imagepng($newimg, $to);
2123        }
2124    }elseif($ext == 'gif') {
2125        if(!function_exists('imagegif')){
2126            $okay = false;
2127        }else{
2128            $okay = imagegif($newimg, $to);
2129        }
2130    }
2131
2132    // destroy GD image ressources
2133    if($image) imagedestroy($image);
2134    if($newimg) imagedestroy($newimg);
2135
2136    return $okay;
2137}
2138
2139/**
2140 * Return other media files with the same base name
2141 * but different extensions.
2142 *
2143 * @param string $src       - ID of media file
2144 * @param array $exts       - alternative extensions to find other files for
2145 * @return array            - mime type => file ID
2146 *
2147 * @author Anika Henke <anika@selfthinker.org>
2148 */
2149function media_alternativefiles($src, $exts){
2150
2151    $files = array();
2152    list($srcExt, $srcMime) = mimetype($src);
2153    $filebase = substr($src, 0, -1 * (strlen($srcExt)+1));
2154
2155    foreach($exts as $ext) {
2156        $fileid = $filebase.'.'.$ext;
2157        $file = mediaFN($fileid);
2158        if(file_exists($file)) {
2159            list($fileExt, $fileMime) = mimetype($file);
2160            $files[$fileMime] = $fileid;
2161        }
2162    }
2163    return $files;
2164}
2165
2166/**
2167 * Check if video/audio is supported to be embedded.
2168 *
2169 * @param string $src       - mimetype of media file
2170 * @param string $type      - type of media files to check ('video', 'audio', or none)
2171 * @return boolean
2172 *
2173 * @author Anika Henke <anika@selfthinker.org>
2174 */
2175function media_supportedav($mime, $type=NULL){
2176    $supportedAudio = array(
2177        'ogg' => 'audio/ogg',
2178        'mp3' => 'audio/mpeg',
2179        'wav' => 'audio/wav',
2180    );
2181    $supportedVideo = array(
2182        'webm' => 'video/webm',
2183        'ogv' => 'video/ogg',
2184        'mp4' => 'video/mp4',
2185    );
2186    if ($type == 'audio') {
2187        $supportedAv = $supportedAudio;
2188    } elseif ($type == 'video') {
2189        $supportedAv = $supportedVideo;
2190    } else {
2191        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2192    }
2193    return in_array($mime, $supportedAv);
2194}
2195
2196/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2197