xref: /dokuwiki/inc/media.php (revision 7ce0a39ec99d93aee3df09ad19d53d6804e27c1c) 
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 $auth no longer used
207 * @return int One of: 0,
208 *                     DOKU_MEDIA_DELETED,
209 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
210 *                     DOKU_MEDIA_NOT_AUTH,
211 *                     DOKU_MEDIA_INUSE
212 */
213function media_delete($id,$auth){
214    global $lang;
215    $auth = auth_quickaclcheck(ltrim(getNS($id).':*', ':'));
216    if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
217    if(media_inuse($id)) return DOKU_MEDIA_INUSE;
218
219    $file = mediaFN($id);
220
221    // trigger an event - MEDIA_DELETE_FILE
222    $data['id']   = $id;
223    $data['name'] = utf8_basename($file);
224    $data['path'] = $file;
225    $data['size'] = (@file_exists($file)) ? filesize($file) : 0;
226
227    $data['unl'] = false;
228    $data['del'] = false;
229    $evt = new Doku_Event('MEDIA_DELETE_FILE',$data);
230    if ($evt->advise_before()) {
231        $old = @filemtime($file);
232        if(!@file_exists(mediaFN($id, $old)) && @file_exists($file)) {
233            // add old revision to the attic
234            media_saveOldRevision($id);
235        }
236
237        $data['unl'] = @unlink($file);
238        if($data['unl']){
239            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted']);
240            $data['del'] = io_sweepNS($id,'mediadir');
241        }
242    }
243    $evt->advise_after();
244    unset($evt);
245
246    if($data['unl'] && $data['del']){
247        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
248    }
249
250    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
251}
252
253/**
254 * Handle file uploads via XMLHttpRequest
255 *
256 * @param string $ns target namespace
257 * @param int $auth current auth check result
258 * @return mixed false on error, id of the new file on success
259 */
260function media_upload_xhr($ns,$auth){
261    if(!checkSecurityToken()) return false;
262    global $INPUT;
263
264    $id = $INPUT->get->str('qqfile');
265    list($ext,$mime) = mimetype($id);
266    $input = fopen("php://input", "r");
267    if (!($tmp = io_mktmpdir())) return false;
268    $path = $tmp.'/'.md5($id);
269    $target = fopen($path, "w");
270    $realSize = stream_copy_to_stream($input, $target);
271    fclose($target);
272    fclose($input);
273    if (isset($_SERVER["CONTENT_LENGTH"]) && ($realSize != (int)$_SERVER["CONTENT_LENGTH"])){
274        unlink($path);
275        return false;
276    }
277
278    $res = media_save(
279        array('name' => $path,
280            'mime' => $mime,
281            'ext'  => $ext),
282        $ns.':'.$id,
283        (($INPUT->get->str('ow') == 'checked') ? true : false),
284        $auth,
285        'copy'
286    );
287    unlink($path);
288    if ($tmp) io_rmdir($tmp, true);
289    if (is_array($res)) {
290        msg($res[0], $res[1]);
291        return false;
292    }
293    return $res;
294}
295
296/**
297 * Handles media file uploads
298 *
299 * @author Andreas Gohr <andi@splitbrain.org>
300 * @author Michael Klier <chi@chimeric.de>
301 * @param string $ns target namespace
302 * @param int $auth current auth check result
303 * @param bool|array $file $_FILES member, $_FILES['upload'] if false
304 * @return mixed false on error, id of the new file on success
305 */
306function media_upload($ns,$auth,$file=false){
307    if(!checkSecurityToken()) return false;
308    global $lang;
309    global $INPUT;
310
311    // get file and id
312    $id   = $INPUT->post->str('mediaid');
313    if (!$file) $file = $_FILES['upload'];
314    if(empty($id)) $id = $file['name'];
315
316    // check for errors (messages are done in lib/exe/mediamanager.php)
317    if($file['error']) return false;
318
319    // check extensions
320    list($fext,$fmime) = mimetype($file['name']);
321    list($iext,$imime) = mimetype($id);
322    if($fext && !$iext){
323        // no extension specified in id - read original one
324        $id   .= '.'.$fext;
325        $imime = $fmime;
326    }elseif($fext && $fext != $iext){
327        // extension was changed, print warning
328        msg(sprintf($lang['mediaextchange'],$fext,$iext));
329    }
330
331    $res = media_save(array('name' => $file['tmp_name'],
332                            'mime' => $imime,
333                            'ext'  => $iext), $ns.':'.$id,
334                      $INPUT->post->bool('ow'), $auth, 'copy_uploaded_file');
335    if (is_array($res)) {
336        msg($res[0], $res[1]);
337        return false;
338    }
339    return $res;
340}
341
342/**
343 * An alternative to move_uploaded_file that copies
344 *
345 * Using copy, makes sure any setgid bits on the media directory are honored
346 *
347 * @see   move_uploaded_file()
348 * @param string $from
349 * @param string $to
350 * @return bool
351 */
352function copy_uploaded_file($from, $to){
353    if(!is_uploaded_file($from)) return false;
354    $ok = copy($from, $to);
355    @unlink($from);
356    return $ok;
357}
358
359/**
360 * This generates an action event and delegates to _media_upload_action().
361 * Action plugins are allowed to pre/postprocess the uploaded file.
362 * (The triggered event is preventable.)
363 *
364 * Event data:
365 * $data[0]     fn_tmp: the temporary file name (read from $_FILES)
366 * $data[1]     fn: the file name of the uploaded file
367 * $data[2]     id: the future directory id of the uploaded file
368 * $data[3]     imime: the mimetype of the uploaded file
369 * $data[4]     overwrite: if an existing file is going to be overwritten
370 *
371 * @triggers MEDIA_UPLOAD_FINISH
372 */
373function media_save($file, $id, $ow, $auth, $move) {
374    if($auth < AUTH_UPLOAD) {
375        return array("You don't have permissions to upload files.", -1);
376    }
377
378    if (!isset($file['mime']) || !isset($file['ext'])) {
379        list($ext, $mime) = mimetype($id);
380        if (!isset($file['mime'])) {
381            $file['mime'] = $mime;
382        }
383        if (!isset($file['ext'])) {
384            $file['ext'] = $ext;
385        }
386    }
387
388    global $lang, $conf;
389
390    // get filename
391    $id   = cleanID($id);
392    $fn   = mediaFN($id);
393
394    // get filetype regexp
395    $types = array_keys(getMimeTypes());
396    $types = array_map(create_function('$q','return preg_quote($q,"/");'),$types);
397    $regex = join('|',$types);
398
399    // because a temp file was created already
400    if(!preg_match('/\.('.$regex.')$/i',$fn)) {
401        return array($lang['uploadwrong'],-1);
402    }
403
404    //check for overwrite
405    $overwrite = @file_exists($fn);
406    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
407    if($overwrite && (!$ow || $auth < $auth_ow)) {
408        return array($lang['uploadexist'], 0);
409    }
410    // check for valid content
411    $ok = media_contentcheck($file['name'], $file['mime']);
412    if($ok == -1){
413        return array(sprintf($lang['uploadbadcontent'],'.' . $file['ext']),-1);
414    }elseif($ok == -2){
415        return array($lang['uploadspam'],-1);
416    }elseif($ok == -3){
417        return array($lang['uploadxss'],-1);
418    }
419
420    // prepare event data
421    $data[0] = $file['name'];
422    $data[1] = $fn;
423    $data[2] = $id;
424    $data[3] = $file['mime'];
425    $data[4] = $overwrite;
426    $data[5] = $move;
427
428    // trigger event
429    return trigger_event('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
430}
431
432/**
433 * Callback adapter for media_upload_finish()
434 * @author Michael Klier <chi@chimeric.de>
435 */
436function _media_upload_action($data) {
437    // fixme do further sanity tests of given data?
438    if(is_array($data) && count($data)===6) {
439        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
440    } else {
441        return false; //callback error
442    }
443}
444
445/**
446 * Saves an uploaded media file
447 *
448 * @author Andreas Gohr <andi@splitbrain.org>
449 * @author Michael Klier <chi@chimeric.de>
450 * @author Kate Arzamastseva <pshns@ukr.net>
451 */
452function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file') {
453    global $conf;
454    global $lang;
455    global $REV;
456
457    $old = @filemtime($fn);
458    if(!@file_exists(mediaFN($id, $old)) && @file_exists($fn)) {
459        // add old revision to the attic if missing
460        media_saveOldRevision($id);
461    }
462
463    // prepare directory
464    io_createNamespace($id, 'media');
465
466    if($move($fn_tmp, $fn)) {
467        @clearstatcache(true,$fn);
468        $new = @filemtime($fn);
469        // Set the correct permission here.
470        // Always chmod media because they may be saved with different permissions than expected from the php umask.
471        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
472        chmod($fn, $conf['fmode']);
473        msg($lang['uploadsucc'],1);
474        media_notify($id,$fn,$imime,$old);
475        // add a log entry to the media changelog
476        if ($REV){
477            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_REVERT, sprintf($lang['restored'], dformat($REV)), $REV);
478        } elseif ($overwrite) {
479            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT);
480        } else {
481            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created']);
482        }
483        return $id;
484    }else{
485        return array($lang['uploadfail'],-1);
486    }
487}
488
489/**
490 * Moves the current version of media file to the media_attic
491 * directory
492 *
493 * @author Kate Arzamastseva <pshns@ukr.net>
494 * @param string $id
495 * @return int - revision date
496 */
497function media_saveOldRevision($id){
498    global $conf, $lang;
499
500    $oldf = mediaFN($id);
501    if(!@file_exists($oldf)) return '';
502    $date = filemtime($oldf);
503    if (!$conf['mediarevisions']) return $date;
504
505    $medialog = new MediaChangeLog($id);
506    if (!$medialog->getRevisionInfo($date)) {
507        // there was an external edit,
508        // there is no log entry for current version of file
509        if (!@file_exists(mediaMetaFN($id,'.changes'))) {
510            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created']);
511        } else {
512            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT);
513        }
514    }
515
516    $newf = mediaFN($id,$date);
517    io_makeFileDir($newf);
518    if(copy($oldf, $newf)) {
519        // Set the correct permission here.
520        // Always chmod media because they may be saved with different permissions than expected from the php umask.
521        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
522        chmod($newf, $conf['fmode']);
523    }
524    return $date;
525}
526
527/**
528 * This function checks if the uploaded content is really what the
529 * mimetype says it is. We also do spam checking for text types here.
530 *
531 * We need to do this stuff because we can not rely on the browser
532 * to do this check correctly. Yes, IE is broken as usual.
533 *
534 * @author Andreas Gohr <andi@splitbrain.org>
535 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
536 * @fixme  check all 26 magic IE filetypes here?
537 */
538function media_contentcheck($file,$mime){
539    global $conf;
540    if($conf['iexssprotect']){
541        $fh = @fopen($file, 'rb');
542        if($fh){
543            $bytes = fread($fh, 256);
544            fclose($fh);
545            if(preg_match('/<(script|a|img|html|body|iframe)[\s>]/i',$bytes)){
546                return -3;
547            }
548        }
549    }
550    if(substr($mime,0,6) == 'image/'){
551        $info = @getimagesize($file);
552        if($mime == 'image/gif' && $info[2] != 1){
553            return -1;
554        }elseif($mime == 'image/jpeg' && $info[2] != 2){
555            return -1;
556        }elseif($mime == 'image/png' && $info[2] != 3){
557            return -1;
558        }
559        # fixme maybe check other images types as well
560    }elseif(substr($mime,0,5) == 'text/'){
561        global $TEXT;
562        $TEXT = io_readFile($file);
563        if(checkwordblock()){
564            return -2;
565        }
566    }
567    return 0;
568}
569
570/**
571 * Send a notify mail on uploads
572 *
573 * @author Andreas Gohr <andi@splitbrain.org>
574 */
575function media_notify($id,$file,$mime,$old_rev=false){
576    global $conf;
577    if(empty($conf['notify'])) return false; //notify enabled?
578
579    $subscription = new Subscription();
580    return $subscription->send_media_diff($conf['notify'], 'uploadmail', $id, $old_rev);
581}
582
583/**
584 * List all files in a given Media namespace
585 */
586function media_filelist($ns,$auth=null,$jump='',$fullscreenview=false,$sort=false){
587    global $conf;
588    global $lang;
589    $ns = cleanID($ns);
590
591    // check auth our self if not given (needed for ajax calls)
592    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
593
594    if (!$fullscreenview) echo '<h1 id="media__ns">:'.hsc($ns).'</h1>'.NL;
595
596    if($auth < AUTH_READ){
597        // FIXME: print permission warning here instead?
598        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
599    }else{
600        if (!$fullscreenview) {
601            media_uploadform($ns, $auth);
602            media_searchform($ns);
603        }
604
605        $dir = utf8_encodeFN(str_replace(':','/',$ns));
606        $data = array();
607        search($data,$conf['mediadir'],'search_media',
608                array('showmsg'=>true,'depth'=>1),$dir,1,$sort);
609
610        if(!count($data)){
611            echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
612        }else {
613            if ($fullscreenview) {
614                echo '<ul class="' . _media_get_list_type() . '">';
615            }
616            foreach($data as $item){
617                if (!$fullscreenview) {
618                    media_printfile($item,$auth,$jump);
619                } else {
620                    media_printfile_thumbs($item,$auth,$jump);
621                }
622            }
623            if ($fullscreenview) echo '</ul>'.NL;
624        }
625    }
626}
627
628/**
629 * Prints tabs for files list actions
630 *
631 * @author Kate Arzamastseva <pshns@ukr.net>
632 * @author Adrian Lang <mail@adrianlang.de>
633 *
634 * @param string $selected_tab - opened tab
635 */
636
637function media_tabs_files($selected_tab = ''){
638    global $lang;
639    $tabs = array();
640    foreach(array('files'  => 'mediaselect',
641                  'upload' => 'media_uploadtab',
642                  'search' => 'media_searchtab') as $tab => $caption) {
643        $tabs[$tab] = array('href'    => media_managerURL(array('tab_files' => $tab), '&'),
644                            'caption' => $lang[$caption]);
645    }
646
647    html_tabs($tabs, $selected_tab);
648}
649
650/**
651 * Prints tabs for files details actions
652 *
653 * @author Kate Arzamastseva <pshns@ukr.net>
654 * @param string $image filename of the current image
655 * @param string $selected_tab opened tab
656 */
657function media_tabs_details($image, $selected_tab = ''){
658    global $lang, $conf;
659
660    $tabs = array();
661    $tabs['view'] = array('href'    => media_managerURL(array('tab_details' => 'view'), '&'),
662                          'caption' => $lang['media_viewtab']);
663
664    list(, $mime) = mimetype($image);
665    if ($mime == 'image/jpeg' && @file_exists(mediaFN($image))) {
666        $tabs['edit'] = array('href'    => media_managerURL(array('tab_details' => 'edit'), '&'),
667                              'caption' => $lang['media_edittab']);
668    }
669    if ($conf['mediarevisions']) {
670        $tabs['history'] = array('href'    => media_managerURL(array('tab_details' => 'history'), '&'),
671                                 'caption' => $lang['media_historytab']);
672    }
673
674    html_tabs($tabs, $selected_tab);
675}
676
677/**
678 * Prints options for the tab that displays a list of all files
679 *
680 * @author Kate Arzamastseva <pshns@ukr.net>
681 */
682function media_tab_files_options(){
683    global $lang;
684    global $INPUT;
685    global $ID;
686    $form = new Doku_Form(array('class' => 'options', 'method' => 'get',
687                                'action' => wl($ID)));
688    $media_manager_params = media_managerURL(array(), '', false, true);
689    foreach($media_manager_params as $pKey => $pVal){
690        $form->addHidden($pKey, $pVal);
691    }
692    $form->addHidden('sectok', null);
693    if ($INPUT->has('q')) {
694        $form->addHidden('q', $INPUT->str('q'));
695    }
696    $form->addElement('<ul>'.NL);
697    foreach(array('list' => array('listType', array('thumbs', 'rows')),
698                  'sort' => array('sortBy', array('name', 'date')))
699            as $group => $content) {
700        $checked = "_media_get_${group}_type";
701        $checked = $checked();
702
703        $form->addElement('<li class="' . $content[0] . '">');
704        foreach($content[1] as $option) {
705            $attrs = array();
706            if ($checked == $option) {
707                $attrs['checked'] = 'checked';
708            }
709            $form->addElement(form_makeRadioField($group . '_dwmedia', $option,
710                                       $lang['media_' . $group . '_' . $option],
711                                                  $content[0] . '__' . $option,
712                                                  $option, $attrs));
713        }
714        $form->addElement('</li>'.NL);
715    }
716    $form->addElement('<li>');
717    $form->addElement(form_makeButton('submit', '', $lang['btn_apply']));
718    $form->addElement('</li>'.NL);
719    $form->addElement('</ul>'.NL);
720    $form->printForm();
721}
722
723/**
724 * Returns type of sorting for the list of files in media manager
725 *
726 * @author Kate Arzamastseva <pshns@ukr.net>
727 * @return string - sort type
728 */
729function _media_get_sort_type() {
730    return _media_get_display_param('sort', array('default' => 'name', 'date'));
731}
732
733/**
734 * Returns type of listing for the list of files in media manager
735 *
736 * @author Kate Arzamastseva <pshns@ukr.net>
737 * @return string - list type
738 */
739function _media_get_list_type() {
740    return _media_get_display_param('list', array('default' => 'thumbs', 'rows'));
741}
742
743/**
744 * Get display parameters
745 *
746 * @param string $param   name of parameter
747 * @param array  $values  allowed values, where default value has index key 'default'
748 * @return string the parameter value
749 */
750function _media_get_display_param($param, $values) {
751    global $INPUT;
752    if (in_array($INPUT->str($param), $values)) {
753        // FIXME: Set cookie
754        return $INPUT->str($param);
755    } else {
756        $val = get_doku_pref($param, $values['default']);
757        if (!in_array($val, $values)) {
758            $val = $values['default'];
759        }
760        return $val;
761    }
762}
763
764/**
765 * Prints tab that displays a list of all files
766 *
767 * @author Kate Arzamastseva <pshns@ukr.net>
768 */
769function media_tab_files($ns,$auth=null,$jump='') {
770    global $lang;
771    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
772
773    if($auth < AUTH_READ){
774        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
775    }else{
776        media_filelist($ns,$auth,$jump,true,_media_get_sort_type());
777    }
778}
779
780/**
781 * Prints tab that displays uploading form
782 *
783 * @author Kate Arzamastseva <pshns@ukr.net>
784 */
785function media_tab_upload($ns,$auth=null,$jump='') {
786    global $lang;
787    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
788
789    echo '<div class="upload">'.NL;
790    if ($auth >= AUTH_UPLOAD) {
791        echo '<p>' . $lang['mediaupload'] . '</p>';
792    }
793    media_uploadform($ns, $auth, true);
794    echo '</div>'.NL;
795}
796
797/**
798 * Prints tab that displays search form
799 *
800 * @author Kate Arzamastseva <pshns@ukr.net>
801 */
802function media_tab_search($ns,$auth=null) {
803    global $INPUT;
804
805    $do = $INPUT->str('mediado');
806    $query = $INPUT->str('q');
807    echo '<div class="search">'.NL;
808
809    media_searchform($ns, $query, true);
810    if ($do == 'searchlist' || $query) {
811        media_searchlist($query,$ns,$auth,true,_media_get_sort_type());
812    }
813    echo '</div>'.NL;
814}
815
816/**
817 * Prints tab that displays mediafile details
818 *
819 * @author Kate Arzamastseva <pshns@ukr.net>
820 */
821function media_tab_view($image, $ns, $auth=null, $rev=false) {
822    global $lang;
823    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
824
825    if ($image && $auth >= AUTH_READ) {
826        $meta = new JpegMeta(mediaFN($image, $rev));
827        media_preview($image, $auth, $rev, $meta);
828        media_preview_buttons($image, $auth, $rev);
829        media_details($image, $auth, $rev, $meta);
830
831    } else {
832        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
833    }
834}
835
836/**
837 * Prints tab that displays form for editing mediafile metadata
838 *
839 * @author Kate Arzamastseva <pshns@ukr.net>
840 */
841function media_tab_edit($image, $ns, $auth=null) {
842    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
843
844    if ($image) {
845        list(, $mime) = mimetype($image);
846        if ($mime == 'image/jpeg') media_metaform($image,$auth);
847    }
848}
849
850/**
851 * Prints tab that displays mediafile revisions
852 *
853 * @author Kate Arzamastseva <pshns@ukr.net>
854 */
855function media_tab_history($image, $ns, $auth=null) {
856    global $lang;
857    global $INPUT;
858
859    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
860    $do = $INPUT->str('mediado');
861
862    if ($auth >= AUTH_READ && $image) {
863        if ($do == 'diff'){
864            media_diff($image, $ns, $auth);
865        } else {
866            $first = $INPUT->int('first');
867            html_revisions($first, $image);
868        }
869    } else {
870        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
871    }
872}
873
874/**
875 * Prints mediafile details
876 *
877 * @param string        $image media id
878 * @param               $auth
879 * @param int|bool      $rev
880 * @param JpegMeta|bool $meta
881 * @author Kate Arzamastseva <pshns@ukr.net>
882 */
883function media_preview($image, $auth, $rev=false, $meta=false) {
884
885    $size = media_image_preview_size($image, $rev, $meta);
886
887    if ($size) {
888        global $lang;
889        echo '<div class="image">';
890
891        $more = array();
892        if ($rev) {
893            $more['rev'] = $rev;
894        } else {
895            $t = @filemtime(mediaFN($image));
896            $more['t'] = $t;
897        }
898
899        $more['w'] = $size[0];
900        $more['h'] = $size[1];
901        $src = ml($image, $more);
902
903        echo '<a href="'.$src.'" target="_blank" title="'.$lang['mediaview'].'">';
904        echo '<img src="'.$src.'" alt="" style="max-width: '.$size[0].'px;" />';
905        echo '</a>';
906
907        echo '</div>'.NL;
908    }
909}
910
911/**
912 * Prints mediafile action buttons
913 *
914 * @author Kate Arzamastseva <pshns@ukr.net>
915 */
916function media_preview_buttons($image, $auth, $rev=false) {
917    global $lang, $conf;
918
919    echo '<ul class="actions">'.NL;
920
921    if($auth >= AUTH_DELETE && !$rev && @file_exists(mediaFN($image))){
922
923        // delete button
924        $form = new Doku_Form(array('id' => 'mediamanager__btn_delete',
925            'action'=>media_managerURL(array('delete' => $image), '&')));
926        $form->addElement(form_makeButton('submit','',$lang['btn_delete']));
927        echo '<li>';
928        $form->printForm();
929        echo '</li>'.NL;
930    }
931
932    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
933    if($auth >= $auth_ow && !$rev){
934
935        // upload new version button
936        $form = new Doku_Form(array('id' => 'mediamanager__btn_update',
937            'action'=>media_managerURL(array('image' => $image, 'mediado' => 'update'), '&')));
938        $form->addElement(form_makeButton('submit','',$lang['media_update']));
939        echo '<li>';
940        $form->printForm();
941        echo '</li>'.NL;
942    }
943
944    if($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && @file_exists(mediaFN($image, $rev))){
945
946        // restore button
947        $form = new Doku_Form(array('id' => 'mediamanager__btn_restore',
948            'action'=>media_managerURL(array('image' => $image), '&')));
949        $form->addHidden('mediado','restore');
950        $form->addHidden('rev',$rev);
951        $form->addElement(form_makeButton('submit','',$lang['media_restore']));
952        echo '<li>';
953        $form->printForm();
954        echo '</li>'.NL;
955    }
956
957    echo '</ul>'.NL;
958}
959
960/**
961 * Returns image width and height for mediamanager preview panel
962 *
963 * @author Kate Arzamastseva <pshns@ukr.net>
964 * @param string   $image
965 * @param int      $rev
966 * @param JpegMeta $meta
967 * @param int      $size
968 * @return array
969 */
970function media_image_preview_size($image, $rev, $meta, $size = 500) {
971    if (!preg_match("/\.(jpe?g|gif|png)$/", $image) || !file_exists(mediaFN($image, $rev))) return false;
972
973    $info = getimagesize(mediaFN($image, $rev));
974    $w = (int) $info[0];
975    $h = (int) $info[1];
976
977    if($meta && ($w > $size || $h > $size)){
978        $ratio = $meta->getResizeRatio($size, $size);
979        $w = floor($w * $ratio);
980        $h = floor($h * $ratio);
981    }
982    return array($w, $h);
983}
984
985/**
986 * Returns the requested EXIF/IPTC tag from the image meta
987 *
988 * @author Kate Arzamastseva <pshns@ukr.net>
989 * @param array $tags
990 * @param JpegMeta $meta
991 * @param string $alt
992 * @return string
993 */
994function media_getTag($tags,$meta,$alt=''){
995    if($meta === false) return $alt;
996    $info = $meta->getField($tags);
997    if($info == false) return $alt;
998    return $info;
999}
1000
1001/**
1002 * Returns mediafile tags
1003 *
1004 * @author Kate Arzamastseva <pshns@ukr.net>
1005 * @param JpegMeta $meta
1006 * @return array
1007 */
1008function media_file_tags($meta) {
1009    // load the field descriptions
1010    static $fields = null;
1011    if(is_null($fields)){
1012        $config_files = getConfigFiles('mediameta');
1013        foreach ($config_files as $config_file) {
1014            if(@file_exists($config_file)) include($config_file);
1015        }
1016    }
1017
1018    $tags = array();
1019
1020    foreach($fields as $key => $tag){
1021        $t = array();
1022        if (!empty($tag[0])) $t = array($tag[0]);
1023        if(isset($tag[3]) && is_array($tag[3])) $t = array_merge($t,$tag[3]);
1024        $value = media_getTag($t, $meta);
1025        $tags[] = array('tag' => $tag, 'value' => $value);
1026    }
1027
1028    return $tags;
1029}
1030
1031/**
1032 * Prints mediafile tags
1033 *
1034 * @author Kate Arzamastseva <pshns@ukr.net>
1035 */
1036function media_details($image, $auth, $rev=false, $meta=false) {
1037    global $lang;
1038
1039    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1040    $tags = media_file_tags($meta);
1041
1042    echo '<dl>'.NL;
1043    foreach($tags as $tag){
1044        if ($tag['value']) {
1045            $value = cleanText($tag['value']);
1046            echo '<dt>'.$lang[$tag['tag'][1]].'</dt><dd>';
1047            if ($tag['tag'][2] == 'date') echo dformat($value);
1048            else echo hsc($value);
1049            echo '</dd>'.NL;
1050        }
1051    }
1052    echo '</dl>'.NL;
1053}
1054
1055/**
1056 * Shows difference between two revisions of file
1057 *
1058 * @author Kate Arzamastseva <pshns@ukr.net>
1059 */
1060function media_diff($image, $ns, $auth, $fromajax = false) {
1061    global $conf;
1062    global $INPUT;
1063
1064    if ($auth < AUTH_READ || !$image || !$conf['mediarevisions']) return '';
1065
1066    $rev1 = $INPUT->int('rev');
1067
1068    $rev2 = $INPUT->ref('rev2');
1069    if(is_array($rev2)){
1070        $rev1 = (int) $rev2[0];
1071        $rev2 = (int) $rev2[1];
1072
1073        if(!$rev1){
1074            $rev1 = $rev2;
1075            unset($rev2);
1076        }
1077    }else{
1078        $rev2 = $INPUT->int('rev2');
1079    }
1080
1081    if ($rev1 && !file_exists(mediaFN($image, $rev1))) $rev1 = false;
1082    if ($rev2 && !file_exists(mediaFN($image, $rev2))) $rev2 = false;
1083
1084    if($rev1 && $rev2){            // two specific revisions wanted
1085        // make sure order is correct (older on the left)
1086        if($rev1 < $rev2){
1087            $l_rev = $rev1;
1088            $r_rev = $rev2;
1089        }else{
1090            $l_rev = $rev2;
1091            $r_rev = $rev1;
1092        }
1093    }elseif($rev1){                // single revision given, compare to current
1094        $r_rev = '';
1095        $l_rev = $rev1;
1096    }else{                        // no revision was given, compare previous to current
1097        $r_rev = '';
1098        $medialog = new MediaChangeLog($image);
1099        $revs = $medialog->getRevisions(0, 1);
1100        if (file_exists(mediaFN($image, $revs[0]))) {
1101            $l_rev = $revs[0];
1102        } else {
1103            $l_rev = '';
1104        }
1105    }
1106
1107    // prepare event data
1108    $data[0] = $image;
1109    $data[1] = $l_rev;
1110    $data[2] = $r_rev;
1111    $data[3] = $ns;
1112    $data[4] = $auth;
1113    $data[5] = $fromajax;
1114
1115    // trigger event
1116    return trigger_event('MEDIA_DIFF', $data, '_media_file_diff', true);
1117
1118}
1119
1120/**
1121 * Callback for media file diff
1122 *
1123 * @param $data
1124 * @return bool|void
1125 */
1126function _media_file_diff($data) {
1127    if(is_array($data) && count($data)===6) {
1128        media_file_diff($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
1129    } else {
1130        return false;
1131    }
1132}
1133
1134/**
1135 * Shows difference between two revisions of image
1136 *
1137 * @author Kate Arzamastseva <pshns@ukr.net>
1138 */
1139function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax){
1140    global $lang;
1141    global $INPUT;
1142
1143    $l_meta = new JpegMeta(mediaFN($image, $l_rev));
1144    $r_meta = new JpegMeta(mediaFN($image, $r_rev));
1145
1146    $is_img = preg_match('/\.(jpe?g|gif|png)$/', $image);
1147    if ($is_img) {
1148        $l_size = media_image_preview_size($image, $l_rev, $l_meta);
1149        $r_size = media_image_preview_size($image, $r_rev, $r_meta);
1150        $is_img = ($l_size && $r_size && ($l_size[0] >= 30 || $r_size[0] >= 30));
1151
1152        $difftype = $INPUT->str('difftype');
1153
1154        if (!$fromajax) {
1155            $form = new Doku_Form(array(
1156                'action' => media_managerURL(array(), '&'),
1157                'method' => 'get',
1158                'id' => 'mediamanager__form_diffview',
1159                'class' => 'diffView'
1160            ));
1161            $form->addHidden('sectok', null);
1162            $form->addElement('<input type="hidden" name="rev2[]" value="'.$l_rev.'" ></input>');
1163            $form->addElement('<input type="hidden" name="rev2[]" value="'.$r_rev.'" ></input>');
1164            $form->addHidden('mediado', 'diff');
1165            $form->printForm();
1166
1167            echo NL.'<div id="mediamanager__diff" >'.NL;
1168        }
1169
1170        if ($difftype == 'opacity' || $difftype == 'portions') {
1171            media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $difftype);
1172            if (!$fromajax) echo '</div>';
1173            return;
1174        }
1175    }
1176
1177    list($l_head, $r_head) = html_diff_head($l_rev, $r_rev, $image, true);
1178
1179    ?>
1180    <div class="table">
1181    <table>
1182      <tr>
1183        <th><?php echo $l_head; ?></th>
1184        <th><?php echo $r_head; ?></th>
1185      </tr>
1186    <?php
1187
1188    echo '<tr class="image">';
1189    echo '<td>';
1190    media_preview($image, $auth, $l_rev, $l_meta);
1191    echo '</td>';
1192
1193    echo '<td>';
1194    media_preview($image, $auth, $r_rev, $r_meta);
1195    echo '</td>';
1196    echo '</tr>'.NL;
1197
1198    echo '<tr class="actions">';
1199    echo '<td>';
1200    media_preview_buttons($image, $auth, $l_rev);
1201    echo '</td>';
1202
1203    echo '<td>';
1204    media_preview_buttons($image, $auth, $r_rev);
1205    echo '</td>';
1206    echo '</tr>'.NL;
1207
1208    $l_tags = media_file_tags($l_meta);
1209    $r_tags = media_file_tags($r_meta);
1210    // FIXME r_tags-only stuff
1211    foreach ($l_tags as $key => $l_tag) {
1212        if ($l_tag['value'] != $r_tags[$key]['value']) {
1213            $r_tags[$key]['highlighted'] = true;
1214            $l_tags[$key]['highlighted'] = true;
1215        } else if (!$l_tag['value'] || !$r_tags[$key]['value']) {
1216            unset($r_tags[$key]);
1217            unset($l_tags[$key]);
1218        }
1219    }
1220
1221    echo '<tr>';
1222    foreach(array($l_tags,$r_tags) as $tags){
1223        echo '<td>'.NL;
1224
1225        echo '<dl class="img_tags">';
1226        foreach($tags as $tag){
1227            $value = cleanText($tag['value']);
1228            if (!$value) $value = '-';
1229            echo '<dt>'.$lang[$tag['tag'][1]].'</dt>';
1230            echo '<dd>';
1231            if ($tag['highlighted']) {
1232                echo '<strong>';
1233            }
1234            if ($tag['tag'][2] == 'date') echo dformat($value);
1235            else echo hsc($value);
1236            if ($tag['highlighted']) {
1237                echo '</strong>';
1238            }
1239            echo '</dd>';
1240        }
1241        echo '</dl>'.NL;
1242
1243        echo '</td>';
1244    }
1245    echo '</tr>'.NL;
1246
1247    echo '</table>'.NL;
1248    echo '</div>'.NL;
1249
1250    if ($is_img && !$fromajax) echo '</div>';
1251}
1252
1253/**
1254 * Prints two images side by side
1255 * and slider
1256 *
1257 * @author Kate Arzamastseva <pshns@ukr.net>
1258 * @param string $image
1259 * @param int $l_rev
1260 * @param int $r_rev
1261 * @param array $l_size
1262 * @param array $r_size
1263 * @param string $type
1264 */
1265function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type) {
1266    if ($l_size != $r_size) {
1267        if ($r_size[0] > $l_size[0]) {
1268            $l_size = $r_size;
1269        }
1270    }
1271
1272    $l_more = array('rev' => $l_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1273    $r_more = array('rev' => $r_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1274
1275    $l_src = ml($image, $l_more);
1276    $r_src = ml($image, $r_more);
1277
1278    // slider
1279    echo '<div class="slider" style="max-width: '.($l_size[0]-20).'px;" ></div>'.NL;
1280
1281    // two images in divs
1282    echo '<div class="imageDiff ' . $type . '">'.NL;
1283    echo '<div class="image1" style="max-width: '.$l_size[0].'px;">';
1284    echo '<img src="'.$l_src.'" alt="" />';
1285    echo '</div>'.NL;
1286    echo '<div class="image2" style="max-width: '.$l_size[0].'px;">';
1287    echo '<img src="'.$r_src.'" alt="" />';
1288    echo '</div>'.NL;
1289    echo '</div>'.NL;
1290}
1291
1292/**
1293 * Restores an old revision of a media file
1294 *
1295 * @param string $image
1296 * @param int $rev
1297 * @param int $auth
1298 * @return string - file's id
1299 * @author Kate Arzamastseva <pshns@ukr.net>
1300 */
1301function media_restore($image, $rev, $auth){
1302    global $conf;
1303    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1304    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1305    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1306    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1307    list(,$imime,) = mimetype($image);
1308    $res = media_upload_finish(mediaFN($image, $rev),
1309        mediaFN($image),
1310        $image,
1311        $imime,
1312        true,
1313        'copy');
1314    if (is_array($res)) {
1315        msg($res[0], $res[1]);
1316        return false;
1317    }
1318    return $res;
1319}
1320
1321/**
1322 * List all files found by the search request
1323 *
1324 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1325 * @author Andreas Gohr <gohr@cosmocode.de>
1326 * @author Kate Arzamastseva <pshns@ukr.net>
1327 * @triggers MEDIA_SEARCH
1328 */
1329function media_searchlist($query,$ns,$auth=null,$fullscreen=false,$sort='natural'){
1330    global $conf;
1331    global $lang;
1332
1333    $ns = cleanID($ns);
1334
1335    if ($query) {
1336        $evdata = array(
1337                'ns'    => $ns,
1338                'data'  => array(),
1339                'query' => $query
1340                );
1341        $evt = new Doku_Event('MEDIA_SEARCH', $evdata);
1342        if ($evt->advise_before()) {
1343            $dir = utf8_encodeFN(str_replace(':','/',$evdata['ns']));
1344            $pattern = '/'.preg_quote($evdata['query'],'/').'/i';
1345            search($evdata['data'],
1346                    $conf['mediadir'],
1347                    'search_media',
1348                    array('showmsg'=>false,'pattern'=>$pattern),
1349                    $dir,
1350                    1,
1351                    $sort);
1352        }
1353        $evt->advise_after();
1354        unset($evt);
1355    }
1356
1357    if (!$fullscreen) {
1358        echo '<h1 id="media__ns">'.sprintf($lang['searchmedia_in'],hsc($ns).':*').'</h1>'.NL;
1359        media_searchform($ns,$query);
1360    }
1361
1362    if(!count($evdata['data'])){
1363        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
1364    }else {
1365        if ($fullscreen) {
1366            echo '<ul class="' . _media_get_list_type() . '">';
1367        }
1368        foreach($evdata['data'] as $item){
1369            if (!$fullscreen) media_printfile($item,$item['perm'],'',true);
1370            else media_printfile_thumbs($item,$item['perm'],false,true);
1371        }
1372        if ($fullscreen) echo '</ul>'.NL;
1373    }
1374}
1375
1376/**
1377 * Formats and prints one file in the list
1378 */
1379function media_printfile($item,$auth,$jump,$display_namespace=false){
1380    global $lang;
1381    global $conf;
1382
1383    // Prepare zebra coloring
1384    // I always wanted to use this variable name :-D
1385    static $twibble = 1;
1386    $twibble *= -1;
1387    $zebra = ($twibble == -1) ? 'odd' : 'even';
1388
1389    // Automatically jump to recent action
1390    if($jump == $item['id']) {
1391        $jump = ' id="scroll__here" ';
1392    }else{
1393        $jump = '';
1394    }
1395
1396    // Prepare fileicons
1397    list($ext) = mimetype($item['file'],false);
1398    $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
1399    $class = 'select mediafile mf_'.$class;
1400
1401    // Prepare filename
1402    $file = utf8_decodeFN($item['file']);
1403
1404    // Prepare info
1405    $info = '';
1406    if($item['isimg']){
1407        $info .= (int) $item['meta']->getField('File.Width');
1408        $info .= '&#215;';
1409        $info .= (int) $item['meta']->getField('File.Height');
1410        $info .= ' ';
1411    }
1412    $info .= '<i>'.dformat($item['mtime']).'</i>';
1413    $info .= ' ';
1414    $info .= filesize_h($item['size']);
1415
1416    // output
1417    echo '<div class="'.$zebra.'"'.$jump.' title="'.hsc($item['id']).'">'.NL;
1418    if (!$display_namespace) {
1419        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($file).'</a> ';
1420    } else {
1421        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($item['id']).'</a><br/>';
1422    }
1423    echo '<span class="info">('.$info.')</span>'.NL;
1424
1425    // view button
1426    $link = ml($item['id'],'',true);
1427    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/magnifier.png" '.
1428        'alt="'.$lang['mediaview'].'" title="'.$lang['mediaview'].'" class="btn" /></a>';
1429
1430    // mediamanager button
1431    $link = wl('',array('do'=>'media','image'=>$item['id'],'ns'=>getNS($item['id'])));
1432    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/mediamanager.png" '.
1433        'alt="'.$lang['btn_media'].'" title="'.$lang['btn_media'].'" class="btn" /></a>';
1434
1435    // delete button
1436    if($item['writable'] && $auth >= AUTH_DELETE){
1437        $link = DOKU_BASE.'lib/exe/mediamanager.php?delete='.rawurlencode($item['id']).
1438            '&amp;sectok='.getSecurityToken();
1439        echo ' <a href="'.$link.'" class="btn_media_delete" title="'.$item['id'].'">'.
1440            '<img src="'.DOKU_BASE.'lib/images/trash.png" alt="'.$lang['btn_delete'].'" '.
1441            'title="'.$lang['btn_delete'].'" class="btn" /></a>';
1442    }
1443
1444    echo '<div class="example" id="ex_'.str_replace(':','_',$item['id']).'">';
1445    echo $lang['mediausage'].' <code>{{:'.$item['id'].'}}</code>';
1446    echo '</div>';
1447    if($item['isimg']) media_printimgdetail($item);
1448    echo '<div class="clearer"></div>'.NL;
1449    echo '</div>'.NL;
1450}
1451
1452/**
1453 * Display a media icon
1454 *
1455 * @param $filename
1456 * @param string $size the size subfolder, if not specified 16x16 is used
1457 * @return string
1458 */
1459function media_printicon($filename, $size=''){
1460    list($ext) = mimetype(mediaFN($filename),false);
1461
1462    if (@file_exists(DOKU_INC.'lib/images/fileicons/'.$size.'/'.$ext.'.png')) {
1463        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/'.$ext.'.png';
1464    } else {
1465        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/file.png';
1466    }
1467
1468    return '<img src="'.$icon.'" alt="'.$filename.'" class="icon" />';
1469}
1470
1471/**
1472 * Formats and prints one file in the list in the thumbnails view
1473 *
1474 * @author Kate Arzamastseva <pshns@ukr.net>
1475 */
1476function media_printfile_thumbs($item,$auth,$jump=false,$display_namespace=false){
1477
1478    // Prepare filename
1479    $file = utf8_decodeFN($item['file']);
1480
1481    // output
1482    echo '<li><dl title="'.hsc($item['id']).'">'.NL;
1483
1484        echo '<dt>';
1485    if($item['isimg']) {
1486        media_printimgdetail($item, true);
1487
1488    } else {
1489        echo '<a id="d_:'.$item['id'].'" class="image" title="'.$item['id'].'" href="'.
1490            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1491            'tab_details' => 'view')).'">';
1492        echo media_printicon($item['id'], '32x32');
1493        echo '</a>';
1494    }
1495    echo '</dt>'.NL;
1496    if (!$display_namespace) {
1497        $name = hsc($file);
1498    } else {
1499        $name = hsc($item['id']);
1500    }
1501    echo '<dd class="name"><a href="'.media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1502        'tab_details' => 'view')).'" id="h_:'.$item['id'].'">'.$name.'</a></dd>'.NL;
1503
1504    if($item['isimg']){
1505        $size = '';
1506        $size .= (int) $item['meta']->getField('File.Width');
1507        $size .= '&#215;';
1508        $size .= (int) $item['meta']->getField('File.Height');
1509        echo '<dd class="size">'.$size.'</dd>'.NL;
1510    } else {
1511        echo '<dd class="size">&#160;</dd>'.NL;
1512    }
1513    $date = dformat($item['mtime']);
1514    echo '<dd class="date">'.$date.'</dd>'.NL;
1515    $filesize = filesize_h($item['size']);
1516    echo '<dd class="filesize">'.$filesize.'</dd>'.NL;
1517    echo '</dl></li>'.NL;
1518}
1519
1520/**
1521 * Prints a thumbnail and metainfo
1522 */
1523function media_printimgdetail($item, $fullscreen=false){
1524    // prepare thumbnail
1525    $size = $fullscreen ? 90 : 120;
1526
1527    $w = (int) $item['meta']->getField('File.Width');
1528    $h = (int) $item['meta']->getField('File.Height');
1529    if($w>$size || $h>$size){
1530        if (!$fullscreen) {
1531            $ratio = $item['meta']->getResizeRatio($size);
1532        } else {
1533            $ratio = $item['meta']->getResizeRatio($size,$size);
1534        }
1535        $w = floor($w * $ratio);
1536        $h = floor($h * $ratio);
1537    }
1538    $src = ml($item['id'],array('w'=>$w,'h'=>$h,'t'=>$item['mtime']));
1539    $p = array();
1540    if (!$fullscreen) {
1541        // In fullscreen mediamanager view, image resizing is done via CSS.
1542        $p['width']  = $w;
1543        $p['height'] = $h;
1544    }
1545    $p['alt']    = $item['id'];
1546    $att = buildAttributes($p);
1547
1548    // output
1549    if ($fullscreen) {
1550        echo '<a id="l_:'.$item['id'].'" class="image thumb" href="'.
1551            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']), 'tab_details' => 'view')).'">';
1552        echo '<img src="'.$src.'" '.$att.' />';
1553        echo '</a>';
1554    }
1555
1556    if ($fullscreen) return;
1557
1558    echo '<div class="detail">';
1559    echo '<div class="thumb">';
1560    echo '<a id="d_:'.$item['id'].'" class="select">';
1561    echo '<img src="'.$src.'" '.$att.' />';
1562    echo '</a>';
1563    echo '</div>';
1564
1565    // read EXIF/IPTC data
1566    $t = $item['meta']->getField(array('IPTC.Headline','xmp.dc:title'));
1567    $d = $item['meta']->getField(array('IPTC.Caption','EXIF.UserComment',
1568                'EXIF.TIFFImageDescription',
1569                'EXIF.TIFFUserComment'));
1570    if(utf8_strlen($d) > 250) $d = utf8_substr($d,0,250).'...';
1571    $k = $item['meta']->getField(array('IPTC.Keywords','IPTC.Category','xmp.dc:subject'));
1572
1573    // print EXIF/IPTC data
1574    if($t || $d || $k ){
1575        echo '<p>';
1576        if($t) echo '<strong>'.htmlspecialchars($t).'</strong><br />';
1577        if($d) echo htmlspecialchars($d).'<br />';
1578        if($t) echo '<em>'.htmlspecialchars($k).'</em>';
1579        echo '</p>';
1580    }
1581    echo '</div>';
1582}
1583
1584/**
1585 * Build link based on the current, adding/rewriting
1586 * parameters
1587 *
1588 * @author Kate Arzamastseva <pshns@ukr.net>
1589 * @param array|bool $params
1590 * @param string     $amp - separator
1591 * @param bool       $abs
1592 * @param bool       $params_array
1593 * @return string|array - link
1594 */
1595function media_managerURL($params=false, $amp='&amp;', $abs=false, $params_array=false) {
1596    global $ID;
1597    global $INPUT;
1598
1599    $gets = array('do' => 'media');
1600    $media_manager_params = array('tab_files', 'tab_details', 'image', 'ns', 'list', 'sort');
1601    foreach ($media_manager_params as $x) {
1602        if ($INPUT->has($x)) $gets[$x] = $INPUT->str($x);
1603    }
1604
1605    if ($params) {
1606        $gets = $params + $gets;
1607    }
1608    unset($gets['id']);
1609    if (isset($gets['delete'])) {
1610        unset($gets['image']);
1611        unset($gets['tab_details']);
1612    }
1613
1614    if ($params_array) return $gets;
1615
1616    return wl($ID,$gets,$abs,$amp);
1617}
1618
1619/**
1620 * Print the media upload form if permissions are correct
1621 *
1622 * @author Andreas Gohr <andi@splitbrain.org>
1623 * @author Kate Arzamastseva <pshns@ukr.net>
1624 */
1625function media_uploadform($ns, $auth, $fullscreen = false){
1626    global $lang;
1627    global $conf;
1628    global $INPUT;
1629
1630    if($auth < AUTH_UPLOAD) {
1631        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
1632        return;
1633    }
1634    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1635
1636    $update = false;
1637    $id = '';
1638    if ($auth >= $auth_ow && $fullscreen && $INPUT->str('mediado') == 'update') {
1639        $update = true;
1640        $id = cleanID($INPUT->str('image'));
1641    }
1642
1643    // The default HTML upload form
1644    $params = array('id'      => 'dw__upload',
1645                    'enctype' => 'multipart/form-data');
1646    if (!$fullscreen) {
1647        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1648    } else {
1649        $params['action'] = media_managerURL(array('tab_files' => 'files',
1650            'tab_details' => 'view'), '&');
1651    }
1652
1653    $form = new Doku_Form($params);
1654    if (!$fullscreen) echo '<div class="upload">' . $lang['mediaupload'] . '</div>';
1655    $form->addElement(formSecurityToken());
1656    $form->addHidden('ns', hsc($ns));
1657    $form->addElement(form_makeOpenTag('p'));
1658    $form->addElement(form_makeFileField('upload', $lang['txt_upload'], 'upload__file'));
1659    $form->addElement(form_makeCloseTag('p'));
1660    $form->addElement(form_makeOpenTag('p'));
1661    $form->addElement(form_makeTextField('mediaid', noNS($id), $lang['txt_filename'], 'upload__name'));
1662    $form->addElement(form_makeButton('submit', '', $lang['btn_upload']));
1663    $form->addElement(form_makeCloseTag('p'));
1664
1665    if($auth >= $auth_ow){
1666        $form->addElement(form_makeOpenTag('p'));
1667        $attrs = array();
1668        if ($update) $attrs['checked'] = 'checked';
1669        $form->addElement(form_makeCheckboxField('ow', 1, $lang['txt_overwrt'], 'dw__ow', 'check', $attrs));
1670        $form->addElement(form_makeCloseTag('p'));
1671    }
1672
1673    echo NL.'<div id="mediamanager__uploader">'.NL;
1674    html_form('upload', $form);
1675
1676    echo '</div>'.NL;
1677
1678    echo '<p class="maxsize">';
1679    printf($lang['maxuploadsize'],filesize_h(media_getuploadsize()));
1680    echo '</p>'.NL;
1681
1682}
1683
1684/**
1685 * Returns the size uploaded files may have
1686 *
1687 * This uses a conservative approach using the lowest number found
1688 * in any of the limiting ini settings
1689 *
1690 * @returns int size in bytes
1691 */
1692function media_getuploadsize(){
1693    $okay = 0;
1694
1695    $post = (int) php_to_byte(@ini_get('post_max_size'));
1696    $suho = (int) php_to_byte(@ini_get('suhosin.post.max_value_length'));
1697    $upld = (int) php_to_byte(@ini_get('upload_max_filesize'));
1698
1699    if($post && ($post < $okay || $okay == 0)) $okay = $post;
1700    if($suho && ($suho < $okay || $okay == 0)) $okay = $suho;
1701    if($upld && ($upld < $okay || $okay == 0)) $okay = $upld;
1702
1703    return $okay;
1704}
1705
1706/**
1707 * Print the search field form
1708 *
1709 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1710 * @author Kate Arzamastseva <pshns@ukr.net>
1711 */
1712function media_searchform($ns,$query='',$fullscreen=false){
1713    global $lang;
1714
1715    // The default HTML search form
1716    $params = array('id' => 'dw__mediasearch');
1717    if (!$fullscreen) {
1718        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1719    } else {
1720        $params['action'] = media_managerURL(array(), '&');
1721    }
1722    $form = new Doku_Form($params);
1723    $form->addHidden('ns', $ns);
1724    $form->addHidden($fullscreen ? 'mediado' : 'do', 'searchlist');
1725
1726    if (!$fullscreen) $form->addElement('<div class="upload">' . $lang['mediasearch'] . '</div>'.NL);
1727    $form->addElement(form_makeOpenTag('p'));
1728    $form->addElement(form_makeTextField('q', $query,$lang['searchmedia'],'','',array('title'=>sprintf($lang['searchmedia_in'],hsc($ns).':*'))));
1729    $form->addElement(form_makeButton('submit', '', $lang['btn_search']));
1730    $form->addElement(form_makeCloseTag('p'));
1731    html_form('searchmedia', $form);
1732}
1733
1734/**
1735 * Build a tree outline of available media namespaces
1736 *
1737 * @author Andreas Gohr <andi@splitbrain.org>
1738 */
1739function media_nstree($ns){
1740    global $conf;
1741    global $lang;
1742
1743    // currently selected namespace
1744    $ns  = cleanID($ns);
1745    if(empty($ns)){
1746        global $ID;
1747        $ns = (string)getNS($ID);
1748    }
1749
1750    $ns_dir  = utf8_encodeFN(str_replace(':','/',$ns));
1751
1752    $data = array();
1753    search($data,$conf['mediadir'],'search_index',array('ns' => $ns_dir, 'nofiles' => true));
1754
1755    // wrap a list with the root level around the other namespaces
1756    array_unshift($data, array('level' => 0, 'id' => '', 'open' =>'true',
1757                               'label' => '['.$lang['mediaroot'].']'));
1758
1759    // insert the current ns into the hierarchy if it isn't already part of it
1760    $ns_parts = explode(':', $ns);
1761    $tmp_ns = '';
1762    $pos = 0;
1763    foreach ($ns_parts as $level => $part) {
1764        if ($tmp_ns) $tmp_ns .= ':'.$part;
1765        else $tmp_ns = $part;
1766
1767        // find the namespace parts or insert them
1768        while ($data[$pos]['id'] != $tmp_ns) {
1769            if ($pos >= count($data) || ($data[$pos]['level'] <= $level+1 && strnatcmp(utf8_encodeFN($data[$pos]['id']), utf8_encodeFN($tmp_ns)) > 0)) {
1770                array_splice($data, $pos, 0, array(array('level' => $level+1, 'id' => $tmp_ns, 'open' => 'true')));
1771                break;
1772            }
1773            ++$pos;
1774        }
1775    }
1776
1777    echo html_buildlist($data,'idx','media_nstree_item','media_nstree_li');
1778}
1779
1780/**
1781 * Userfunction for html_buildlist
1782 *
1783 * Prints a media namespace tree item
1784 *
1785 * @author Andreas Gohr <andi@splitbrain.org>
1786 */
1787function media_nstree_item($item){
1788    global $INPUT;
1789    $pos   = strrpos($item['id'], ':');
1790    $label = substr($item['id'], $pos > 0 ? $pos + 1 : 0);
1791    if(empty($item['label'])) $item['label'] = $label;
1792
1793    $ret  = '';
1794    if (!($INPUT->str('do') == 'media'))
1795    $ret .= '<a href="'.DOKU_BASE.'lib/exe/mediamanager.php?ns='.idfilter($item['id']).'" class="idx_dir">';
1796    else $ret .= '<a href="'.media_managerURL(array('ns' => idfilter($item['id'], false), 'tab_files' => 'files'))
1797        .'" class="idx_dir">';
1798    $ret .= $item['label'];
1799    $ret .= '</a>';
1800    return $ret;
1801}
1802
1803/**
1804 * Userfunction for html_buildlist
1805 *
1806 * Prints a media namespace tree item opener
1807 *
1808 * @author Andreas Gohr <andi@splitbrain.org>
1809 */
1810function media_nstree_li($item){
1811    $class='media level'.$item['level'];
1812    if($item['open']){
1813        $class .= ' open';
1814        $img   = DOKU_BASE.'lib/images/minus.gif';
1815        $alt   = '−';
1816    }else{
1817        $class .= ' closed';
1818        $img   = DOKU_BASE.'lib/images/plus.gif';
1819        $alt   = '+';
1820    }
1821    // TODO: only deliver an image if it actually has a subtree...
1822    return '<li class="'.$class.'">'.
1823        '<img src="'.$img.'" alt="'.$alt.'" />';
1824}
1825
1826/**
1827 * Resizes the given image to the given size
1828 *
1829 * @author  Andreas Gohr <andi@splitbrain.org>
1830 */
1831function media_resize_image($file, $ext, $w, $h=0){
1832    global $conf;
1833
1834    $info = @getimagesize($file); //get original size
1835    if($info == false) return $file; // that's no image - it's a spaceship!
1836
1837    if(!$h) $h = round(($w * $info[1]) / $info[0]);
1838    if(!$w) $w = round(($h * $info[0]) / $info[1]);
1839
1840    // we wont scale up to infinity
1841    if($w > 2000 || $h > 2000) return $file;
1842
1843    // resize necessary? - (w,h) = native dimensions
1844    if(($w == $info[0]) && ($h == $info[1])) return $file;
1845
1846    //cache
1847    $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
1848    $mtime = @filemtime($local); // 0 if not exists
1849
1850    if( $mtime > filemtime($file) ||
1851            media_resize_imageIM($ext,$file,$info[0],$info[1],$local,$w,$h) ||
1852            media_resize_imageGD($ext,$file,$info[0],$info[1],$local,$w,$h) ){
1853        if(!empty($conf['fperm'])) @chmod($local, $conf['fperm']);
1854        return $local;
1855    }
1856    //still here? resizing failed
1857    return $file;
1858}
1859
1860/**
1861 * Crops the given image to the wanted ratio, then calls media_resize_image to scale it
1862 * to the wanted size
1863 *
1864 * Crops are centered horizontally but prefer the upper third of an vertical
1865 * image because most pics are more interesting in that area (rule of thirds)
1866 *
1867 * @author  Andreas Gohr <andi@splitbrain.org>
1868 */
1869function media_crop_image($file, $ext, $w, $h=0){
1870    global $conf;
1871
1872    if(!$h) $h = $w;
1873    $info = @getimagesize($file); //get original size
1874    if($info == false) return $file; // that's no image - it's a spaceship!
1875
1876    // calculate crop size
1877    $fr = $info[0]/$info[1];
1878    $tr = $w/$h;
1879
1880    // check if the crop can be handled completely by resize,
1881    // i.e. the specified width & height match the aspect ratio of the source image
1882    if ($w == round($h*$fr)) {
1883        return media_resize_image($file, $ext, $w);
1884    }
1885
1886    if($tr >= 1){
1887        if($tr > $fr){
1888            $cw = $info[0];
1889            $ch = (int) ($info[0]/$tr);
1890        }else{
1891            $cw = (int) ($info[1]*$tr);
1892            $ch = $info[1];
1893        }
1894    }else{
1895        if($tr < $fr){
1896            $cw = (int) ($info[1]*$tr);
1897            $ch = $info[1];
1898        }else{
1899            $cw = $info[0];
1900            $ch = (int) ($info[0]/$tr);
1901        }
1902    }
1903    // calculate crop offset
1904    $cx = (int) (($info[0]-$cw)/2);
1905    $cy = (int) (($info[1]-$ch)/3);
1906
1907    //cache
1908    $local = getCacheName($file,'.media.'.$cw.'x'.$ch.'.crop.'.$ext);
1909    $mtime = @filemtime($local); // 0 if not exists
1910
1911    if( $mtime > @filemtime($file) ||
1912            media_crop_imageIM($ext,$file,$info[0],$info[1],$local,$cw,$ch,$cx,$cy) ||
1913            media_resize_imageGD($ext,$file,$cw,$ch,$local,$cw,$ch,$cx,$cy) ){
1914        if(!empty($conf['fperm'])) @chmod($local, $conf['fperm']);
1915        return media_resize_image($local,$ext, $w, $h);
1916    }
1917
1918    //still here? cropping failed
1919    return media_resize_image($file,$ext, $w, $h);
1920}
1921
1922/**
1923 * Calculate a token to be used to verify fetch requests for resized or
1924 * cropped images have been internally generated - and prevent external
1925 * DDOS attacks via fetch
1926 *
1927 * @author Christopher Smith <chris@jalakai.co.uk>
1928 *
1929 * @param string  $id    id of the image
1930 * @param int     $w     resize/crop width
1931 * @param int     $h     resize/crop height
1932 * @return string
1933 */
1934function media_get_token($id,$w,$h){
1935    // token is only required for modified images
1936    if ($w || $h || media_isexternal($id)) {
1937        $token = $id;
1938        if ($w) $token .= '.'.$w;
1939        if ($h) $token .= '.'.$h;
1940
1941        return substr(PassHash::hmac('md5', $token, auth_cookiesalt()),0,6);
1942    }
1943
1944    return '';
1945}
1946
1947/**
1948 * Download a remote file and return local filename
1949 *
1950 * returns false if download fails. Uses cached file if available and
1951 * wanted
1952 *
1953 * @author  Andreas Gohr <andi@splitbrain.org>
1954 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
1955 */
1956function media_get_from_URL($url,$ext,$cache){
1957    global $conf;
1958
1959    // if no cache or fetchsize just redirect
1960    if ($cache==0)           return false;
1961    if (!$conf['fetchsize']) return false;
1962
1963    $local = getCacheName(strtolower($url),".media.$ext");
1964    $mtime = @filemtime($local); // 0 if not exists
1965
1966    //decide if download needed:
1967    if( ($mtime == 0) ||                           // cache does not exist
1968            ($cache != -1 && $mtime < time()-$cache)   // 'recache' and cache has expired
1969      ){
1970        if(media_image_download($url,$local)){
1971            return $local;
1972        }else{
1973            return false;
1974        }
1975    }
1976
1977    //if cache exists use it else
1978    if($mtime) return $local;
1979
1980    //else return false
1981    return false;
1982}
1983
1984/**
1985 * Download image files
1986 *
1987 * @author Andreas Gohr <andi@splitbrain.org>
1988 */
1989function media_image_download($url,$file){
1990    global $conf;
1991    $http = new DokuHTTPClient();
1992    $http->keep_alive = false; // we do single ops here, no need for keep-alive
1993
1994    $http->max_bodysize = $conf['fetchsize'];
1995    $http->timeout = 25; //max. 25 sec
1996    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
1997
1998    $data = $http->get($url);
1999    if(!$data) return false;
2000
2001    $fileexists = @file_exists($file);
2002    $fp = @fopen($file,"w");
2003    if(!$fp) return false;
2004    fwrite($fp,$data);
2005    fclose($fp);
2006    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
2007
2008    // check if it is really an image
2009    $info = @getimagesize($file);
2010    if(!$info){
2011        @unlink($file);
2012        return false;
2013    }
2014
2015    return true;
2016}
2017
2018/**
2019 * resize images using external ImageMagick convert program
2020 *
2021 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
2022 * @author Andreas Gohr <andi@splitbrain.org>
2023 */
2024function media_resize_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
2025    global $conf;
2026
2027    // check if convert is configured
2028    if(!$conf['im_convert']) return false;
2029
2030    // prepare command
2031    $cmd  = $conf['im_convert'];
2032    $cmd .= ' -resize '.$to_w.'x'.$to_h.'!';
2033    if ($ext == 'jpg' || $ext == 'jpeg') {
2034        $cmd .= ' -quality '.$conf['jpg_quality'];
2035    }
2036    $cmd .= " $from $to";
2037
2038    @exec($cmd,$out,$retval);
2039    if ($retval == 0) return true;
2040    return false;
2041}
2042
2043/**
2044 * crop images using external ImageMagick convert program
2045 *
2046 * @author Andreas Gohr <andi@splitbrain.org>
2047 */
2048function media_crop_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x,$ofs_y){
2049    global $conf;
2050
2051    // check if convert is configured
2052    if(!$conf['im_convert']) return false;
2053
2054    // prepare command
2055    $cmd  = $conf['im_convert'];
2056    $cmd .= ' -crop '.$to_w.'x'.$to_h.'+'.$ofs_x.'+'.$ofs_y;
2057    if ($ext == 'jpg' || $ext == 'jpeg') {
2058        $cmd .= ' -quality '.$conf['jpg_quality'];
2059    }
2060    $cmd .= " $from $to";
2061
2062    @exec($cmd,$out,$retval);
2063    if ($retval == 0) return true;
2064    return false;
2065}
2066
2067/**
2068 * resize or crop images using PHP's libGD support
2069 *
2070 * @author Andreas Gohr <andi@splitbrain.org>
2071 * @author Sebastian Wienecke <s_wienecke@web.de>
2072 */
2073function media_resize_imageGD($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x=0,$ofs_y=0){
2074    global $conf;
2075
2076    if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2077
2078    // check available memory
2079    if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){
2080        return false;
2081    }
2082
2083    // create an image of the given filetype
2084    if ($ext == 'jpg' || $ext == 'jpeg'){
2085        if(!function_exists("imagecreatefromjpeg")) return false;
2086        $image = @imagecreatefromjpeg($from);
2087    }elseif($ext == 'png') {
2088        if(!function_exists("imagecreatefrompng")) return false;
2089        $image = @imagecreatefrompng($from);
2090
2091    }elseif($ext == 'gif') {
2092        if(!function_exists("imagecreatefromgif")) return false;
2093        $image = @imagecreatefromgif($from);
2094    }
2095    if(!$image) return false;
2096
2097    if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
2098        $newimg = @imagecreatetruecolor ($to_w, $to_h);
2099    }
2100    if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
2101    if(!$newimg){
2102        imagedestroy($image);
2103        return false;
2104    }
2105
2106    //keep png alpha channel if possible
2107    if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
2108        imagealphablending($newimg, false);
2109        imagesavealpha($newimg,true);
2110    }
2111
2112    //keep gif transparent color if possible
2113    if($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2114        if(function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2115            $transcolorindex = @imagecolortransparent($image);
2116            if($transcolorindex >= 0 ) { //transparent color exists
2117                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2118                $transcolorindex = @imagecolorallocate($newimg, $transcolor['red'], $transcolor['green'], $transcolor['blue']);
2119                @imagefill($newimg, 0, 0, $transcolorindex);
2120                @imagecolortransparent($newimg, $transcolorindex);
2121            }else{ //filling with white
2122                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2123                @imagefill($newimg, 0, 0, $whitecolorindex);
2124            }
2125        }else{ //filling with white
2126            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2127            @imagefill($newimg, 0, 0, $whitecolorindex);
2128        }
2129    }
2130
2131    //try resampling first
2132    if(function_exists("imagecopyresampled")){
2133        if(!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2134            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2135        }
2136    }else{
2137        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2138    }
2139
2140    $okay = false;
2141    if ($ext == 'jpg' || $ext == 'jpeg'){
2142        if(!function_exists('imagejpeg')){
2143            $okay = false;
2144        }else{
2145            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2146        }
2147    }elseif($ext == 'png') {
2148        if(!function_exists('imagepng')){
2149            $okay = false;
2150        }else{
2151            $okay =  imagepng($newimg, $to);
2152        }
2153    }elseif($ext == 'gif') {
2154        if(!function_exists('imagegif')){
2155            $okay = false;
2156        }else{
2157            $okay = imagegif($newimg, $to);
2158        }
2159    }
2160
2161    // destroy GD image ressources
2162    if($image) imagedestroy($image);
2163    if($newimg) imagedestroy($newimg);
2164
2165    return $okay;
2166}
2167
2168/**
2169 * Return other media files with the same base name
2170 * but different extensions.
2171 *
2172 * @param string $src       - ID of media file
2173 * @param array $exts       - alternative extensions to find other files for
2174 * @return array            - mime type => file ID
2175 *
2176 * @author Anika Henke <anika@selfthinker.org>
2177 */
2178function media_alternativefiles($src, $exts){
2179
2180    $files = array();
2181    list($srcExt, $srcMime) = mimetype($src);
2182    $filebase = substr($src, 0, -1 * (strlen($srcExt)+1));
2183
2184    foreach($exts as $ext) {
2185        $fileid = $filebase.'.'.$ext;
2186        $file = mediaFN($fileid);
2187        if(file_exists($file)) {
2188            list($fileExt, $fileMime) = mimetype($file);
2189            $files[$fileMime] = $fileid;
2190        }
2191    }
2192    return $files;
2193}
2194
2195/**
2196 * Check if video/audio is supported to be embedded.
2197 *
2198 * @param string $mime      - mimetype of media file
2199 * @param string $type      - type of media files to check ('video', 'audio', or none)
2200 * @return boolean
2201 *
2202 * @author Anika Henke <anika@selfthinker.org>
2203 */
2204function media_supportedav($mime, $type=NULL){
2205    $supportedAudio = array(
2206        'ogg' => 'audio/ogg',
2207        'mp3' => 'audio/mpeg',
2208        'wav' => 'audio/wav',
2209    );
2210    $supportedVideo = array(
2211        'webm' => 'video/webm',
2212        'ogv' => 'video/ogg',
2213        'mp4' => 'video/mp4',
2214    );
2215    if ($type == 'audio') {
2216        $supportedAv = $supportedAudio;
2217    } elseif ($type == 'video') {
2218        $supportedAv = $supportedVideo;
2219    } else {
2220        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2221    }
2222    return in_array($mime, $supportedAv);
2223}
2224
2225/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2226