xref: /haiku/src/apps/mediaplayer/playlist/Playlist.cpp (revision 6f80a9801fedbe7355c4360bd204ba746ec3ec2d) 
1 /*
2  * Playlist.cpp - Media Player for the Haiku Operating System
3  *
4  * Copyright (C) 2006 Marcus Overhagen <marcus@overhagen.de>
5  * Copyright (C) 2007-2009 Stephan Aßmus <superstippi@gmx.de> (MIT ok)
6  * Copyright (C) 2008-2009 Fredrik Modéen <[FirstName]@[LastName].se> (MIT ok)
7  *
8  * Released under the terms of the MIT license.
9  */
10 
11 
12 #include "Playlist.h"
13 
14 #include <debugger.h>
15 #include <new>
16 #include <stdio.h>
17 #include <strings.h>
18 
19 #include <AppFileInfo.h>
20 #include <Application.h>
21 #include <Autolock.h>
22 #include <Directory.h>
23 #include <Entry.h>
24 #include <File.h>
25 #include <Message.h>
26 #include <Mime.h>
27 #include <NodeInfo.h>
28 #include <Path.h>
29 #include <Roster.h>
30 #include <String.h>
31 
32 #include <QueryFile.h>
33 
34 #include "FilePlaylistItem.h"
35 #include "FileReadWrite.h"
36 #include "MainApp.h"
37 
38 using std::nothrow;
39 
40 // TODO: using BList for objects is bad, replace it with a template
41 
42 Playlist::Listener::Listener() {}
43 Playlist::Listener::~Listener() {}
44 void Playlist::Listener::ItemAdded(PlaylistItem* item, int32 index) {}
45 void Playlist::Listener::ItemRemoved(int32 index) {}
46 void Playlist::Listener::ItemsSorted() {}
47 void Playlist::Listener::CurrentItemChanged(int32 newIndex, bool play) {}
48 void Playlist::Listener::ImportFailed() {}
49 
50 
51 // #pragma mark -
52 
53 
54 static void
55 make_item_compare_string(const PlaylistItem* item, char* buffer,
56 	size_t bufferSize)
57 {
58 	// TODO: Maybe "location" would be useful here as well.
59 //	snprintf(buffer, bufferSize, "%s - %s - %0*ld - %s",
60 //		item->Author().String(),
61 //		item->Album().String(),
62 //		3, item->TrackNumber(),
63 //		item->Title().String());
64 	snprintf(buffer, bufferSize, "%s", item->LocationURI().String());
65 }
66 
67 
68 static int
69 playlist_item_compare(const void* _item1, const void* _item2)
70 {
71 	// compare complete path
72 	const PlaylistItem* item1 = *(const PlaylistItem**)_item1;
73 	const PlaylistItem* item2 = *(const PlaylistItem**)_item2;
74 
75 	static const size_t bufferSize = 1024;
76 	char string1[bufferSize];
77 	make_item_compare_string(item1, string1, bufferSize);
78 	char string2[bufferSize];
79 	make_item_compare_string(item2, string2, bufferSize);
80 
81 	return strcmp(string1, string2);
82 }
83 
84 
85 // #pragma mark -
86 
87 
88 Playlist::Playlist()
89 	:
90 	BLocker("playlist lock"),
91 	fItems(),
92  	fCurrentIndex(-1)
93 {
94 }
95 
96 
97 Playlist::~Playlist()
98 {
99 	MakeEmpty();
100 
101 	if (fListeners.CountItems() > 0)
102 		debugger("Playlist::~Playlist() - there are still listeners attached!");
103 }
104 
105 
106 // #pragma mark - archiving
107 
108 
109 static const char* kItemArchiveKey = "item";
110 
111 
112 status_t
113 Playlist::Unarchive(const BMessage* archive)
114 {
115 	if (archive == NULL)
116 		return B_BAD_VALUE;
117 
118 	MakeEmpty();
119 
120 	BMessage itemArchive;
121 	for (int32 i = 0;
122 		archive->FindMessage(kItemArchiveKey, i, &itemArchive) == B_OK; i++) {
123 
124 		BArchivable* archivable = instantiate_object(&itemArchive);
125 		PlaylistItem* item = dynamic_cast<PlaylistItem*>(archivable);
126 		if (!item) {
127 			delete archivable;
128 			continue;
129 		}
130 
131 		if (!AddItem(item)) {
132 			delete item;
133 			return B_NO_MEMORY;
134 		}
135 	}
136 
137 	return B_OK;
138 }
139 
140 
141 status_t
142 Playlist::Archive(BMessage* into) const
143 {
144 	if (into == NULL)
145 		return B_BAD_VALUE;
146 
147 	int32 count = CountItems();
148 	for (int32 i = 0; i < count; i++) {
149 		const PlaylistItem* item = ItemAtFast(i);
150 		BMessage itemArchive;
151 		status_t ret = item->Archive(&itemArchive);
152 		if (ret != B_OK)
153 			return ret;
154 		ret = into->AddMessage(kItemArchiveKey, &itemArchive);
155 		if (ret != B_OK)
156 			return ret;
157 	}
158 
159 	return B_OK;
160 }
161 
162 
163 const uint32 kPlaylistMagicBytes = 'MPPL';
164 const char* kTextPlaylistMimeString = "text/x-playlist";
165 const char* kBinaryPlaylistMimeString = "application/x-vnd.haiku-playlist";
166 
167 status_t
168 Playlist::Unflatten(BDataIO* stream)
169 {
170 	if (stream == NULL)
171 		return B_BAD_VALUE;
172 
173 	uint32 magicBytes;
174 	ssize_t read = stream->Read(&magicBytes, 4);
175 	if (read != 4) {
176 		if (read < 0)
177 			return (status_t)read;
178 		return B_IO_ERROR;
179 	}
180 
181 	if (B_LENDIAN_TO_HOST_INT32(magicBytes) != kPlaylistMagicBytes)
182 		return B_BAD_VALUE;
183 
184 	BMessage archive;
185 	status_t ret = archive.Unflatten(stream);
186 	if (ret != B_OK)
187 		return ret;
188 
189 	return Unarchive(&archive);
190 }
191 
192 
193 status_t
194 Playlist::Flatten(BDataIO* stream) const
195 {
196 	if (stream == NULL)
197 		return B_BAD_VALUE;
198 
199 	BMessage archive;
200 	status_t ret = Archive(&archive);
201 	if (ret != B_OK)
202 		return ret;
203 
204 	uint32 magicBytes = B_HOST_TO_LENDIAN_INT32(kPlaylistMagicBytes);
205 	ssize_t written = stream->Write(&magicBytes, 4);
206 	if (written != 4) {
207 		if (written < 0)
208 			return (status_t)written;
209 		return B_IO_ERROR;
210 	}
211 
212 	return archive.Flatten(stream);
213 }
214 
215 
216 // #pragma mark - list access
217 
218 
219 void
220 Playlist::MakeEmpty(bool deleteItems)
221 {
222 	int32 count = CountItems();
223 	for (int32 i = count - 1; i >= 0; i--) {
224 		PlaylistItem* item = RemoveItem(i, false);
225 		_NotifyItemRemoved(i);
226 		if (deleteItems)
227 			item->ReleaseReference();
228 	}
229 	SetCurrentItemIndex(-1);
230 }
231 
232 
233 int32
234 Playlist::CountItems() const
235 {
236 	return fItems.CountItems();
237 }
238 
239 
240 bool
241 Playlist::IsEmpty() const
242 {
243 	return fItems.IsEmpty();
244 }
245 
246 
247 void
248 Playlist::Sort()
249 {
250 	fItems.SortItems(playlist_item_compare);
251 	_NotifyItemsSorted();
252 }
253 
254 
255 bool
256 Playlist::AddItem(PlaylistItem* item)
257 {
258 	return AddItem(item, CountItems());
259 }
260 
261 
262 bool
263 Playlist::AddItem(PlaylistItem* item, int32 index)
264 {
265 	if (!fItems.AddItem(item, index))
266 		return false;
267 
268 	if (index <= fCurrentIndex)
269 		SetCurrentItemIndex(fCurrentIndex + 1, false);
270 
271 	_NotifyItemAdded(item, index);
272 
273 	return true;
274 }
275 
276 
277 bool
278 Playlist::AdoptPlaylist(Playlist& other)
279 {
280 	return AdoptPlaylist(other, CountItems());
281 }
282 
283 
284 bool
285 Playlist::AdoptPlaylist(Playlist& other, int32 index)
286 {
287 	if (&other == this)
288 		return false;
289 	// NOTE: this is not intended to merge two "equal" playlists
290 	// the given playlist is assumed to be a temporary "dummy"
291 	if (fItems.AddList(&other.fItems, index)) {
292 		// take care of the notifications
293 		int32 count = other.CountItems();
294 		for (int32 i = index; i < index + count; i++) {
295 			PlaylistItem* item = ItemAtFast(i);
296 			_NotifyItemAdded(item, i);
297 		}
298 		if (index <= fCurrentIndex)
299 			SetCurrentItemIndex(fCurrentIndex + count);
300 		// empty the other list, so that the PlaylistItems are now ours
301 		other.fItems.MakeEmpty();
302 		return true;
303 	}
304 	return false;
305 }
306 
307 
308 PlaylistItem*
309 Playlist::RemoveItem(int32 index, bool careAboutCurrentIndex)
310 {
311 	PlaylistItem* item = (PlaylistItem*)fItems.RemoveItem(index);
312 	if (!item)
313 		return NULL;
314 	_NotifyItemRemoved(index);
315 
316 	if (careAboutCurrentIndex) {
317 		// fCurrentIndex isn't in sync yet, so might be one too large (if the
318 		// removed item was above the currently playing item).
319 		if (index < fCurrentIndex)
320 			SetCurrentItemIndex(fCurrentIndex - 1, false);
321 		else if (index == fCurrentIndex) {
322 			if (fCurrentIndex == CountItems())
323 				fCurrentIndex--;
324 			SetCurrentItemIndex(fCurrentIndex, true);
325 		}
326 	}
327 
328 	return item;
329 }
330 
331 
332 int32
333 Playlist::IndexOf(PlaylistItem* item) const
334 {
335 	return fItems.IndexOf(item);
336 }
337 
338 
339 PlaylistItem*
340 Playlist::ItemAt(int32 index) const
341 {
342 	return (PlaylistItem*)fItems.ItemAt(index);
343 }
344 
345 
346 PlaylistItem*
347 Playlist::ItemAtFast(int32 index) const
348 {
349 	return (PlaylistItem*)fItems.ItemAtFast(index);
350 }
351 
352 
353 // #pragma mark - navigation
354 
355 
356 bool
357 Playlist::SetCurrentItemIndex(int32 index, bool notify)
358 {
359 	bool result = true;
360 	if (index >= CountItems()) {
361 		index = CountItems() - 1;
362 		result = false;
363 		notify = false;
364 	}
365 	if (index < 0) {
366 		index = -1;
367 		result = false;
368 	}
369 	if (index == fCurrentIndex && !notify)
370 		return result;
371 
372 	fCurrentIndex = index;
373 	_NotifyCurrentItemChanged(fCurrentIndex, notify);
374 	return result;
375 }
376 
377 
378 int32
379 Playlist::CurrentItemIndex() const
380 {
381 	return fCurrentIndex;
382 }
383 
384 
385 void
386 Playlist::GetSkipInfo(bool* canSkipPrevious, bool* canSkipNext) const
387 {
388 	if (canSkipPrevious)
389 		*canSkipPrevious = fCurrentIndex > 0;
390 	if (canSkipNext)
391 		*canSkipNext = fCurrentIndex < CountItems() - 1;
392 }
393 
394 
395 // pragma mark -
396 
397 
398 bool
399 Playlist::AddListener(Listener* listener)
400 {
401 	BAutolock _(this);
402 	if (listener && !fListeners.HasItem(listener))
403 		return fListeners.AddItem(listener);
404 	return false;
405 }
406 
407 
408 void
409 Playlist::RemoveListener(Listener* listener)
410 {
411 	BAutolock _(this);
412 	fListeners.RemoveItem(listener);
413 }
414 
415 
416 // #pragma mark - support
417 
418 
419 void
420 Playlist::AppendItems(const BMessage* refsReceivedMessage, int32 appendIndex,
421 	bool sortItems)
422 {
423 	// the playlist is replaced by the refs in the message
424 	// or the refs are appended at the appendIndex
425 	// in the existing playlist
426 	if (appendIndex == APPEND_INDEX_APPEND_LAST)
427 		appendIndex = CountItems();
428 
429 	bool add = appendIndex != APPEND_INDEX_REPLACE_PLAYLIST;
430 
431 	if (!add)
432 		MakeEmpty();
433 
434 	bool startPlaying = CountItems() == 0;
435 
436 	Playlist temporaryPlaylist;
437 	Playlist* playlist = add ? &temporaryPlaylist : this;
438 	bool hasSavedPlaylist = false;
439 
440 	// TODO: This is not very fair, we should abstract from
441 	// entry ref representation and support more URLs.
442 	BMessage archivedUrl;
443 	if (refsReceivedMessage->FindMessage("mediaplayer:url", &archivedUrl)
444 			== B_OK) {
445 		BUrl url(&archivedUrl);
446 		AddItem(new UrlPlaylistItem(url));
447 	}
448 
449 	entry_ref ref;
450 	int32 subAppendIndex = CountItems();
451 	for (int i = 0; refsReceivedMessage->FindRef("refs", i, &ref) == B_OK;
452 			i++) {
453 		Playlist subPlaylist;
454 		BString type = _MIMEString(&ref);
455 
456 		if (_IsPlaylist(type)) {
457 			AppendPlaylistToPlaylist(ref, &subPlaylist);
458 			// Do not sort the whole playlist anymore, as that
459 			// will screw up the ordering in the saved playlist.
460 			hasSavedPlaylist = true;
461 		} else {
462 			if (_IsQuery(type))
463 				AppendQueryToPlaylist(ref, &subPlaylist);
464 			else {
465 				PlaylistFileReader* reader = PlaylistFileReader::GenerateReader(ref);
466 				if (reader != NULL) {
467 					reader->AppendToPlaylist(ref, &subPlaylist);
468 					delete reader;
469 				} else {
470 					if (!_ExtraMediaExists(this, ref)) {
471 						AppendToPlaylistRecursive(ref, &subPlaylist);
472 					}
473 				}
474 			}
475 
476 			// At least sort this subsection of the playlist
477 			// if the whole playlist is not sorted anymore.
478 			if (sortItems && hasSavedPlaylist)
479 				subPlaylist.Sort();
480 		}
481 
482 		if (!subPlaylist.IsEmpty()) {
483 			// Add to recent documents
484 			be_roster->AddToRecentDocuments(&ref, kAppSig);
485 		}
486 
487 		int32 subPlaylistCount = subPlaylist.CountItems();
488 		AdoptPlaylist(subPlaylist, subAppendIndex);
489 		subAppendIndex += subPlaylistCount;
490 	}
491 
492 	if (sortItems)
493 		playlist->Sort();
494 
495 	if (add)
496 		AdoptPlaylist(temporaryPlaylist, appendIndex);
497 
498 	if (startPlaying) {
499 		// open first file
500 		SetCurrentItemIndex(0);
501 	}
502 }
503 
504 
505 /*static*/ void
506 Playlist::AppendToPlaylistRecursive(const entry_ref& ref, Playlist* playlist)
507 {
508 	// recursively append the ref (dive into folders)
509 	BEntry entry(&ref, true);
510 	if (entry.InitCheck() != B_OK || !entry.Exists())
511 		return;
512 
513 	if (entry.IsDirectory()) {
514 		BDirectory dir(&entry);
515 		if (dir.InitCheck() != B_OK)
516 			return;
517 
518 		entry.Unset();
519 
520 		entry_ref subRef;
521 		while (dir.GetNextRef(&subRef) == B_OK) {
522 			AppendToPlaylistRecursive(subRef, playlist);
523 		}
524 	} else if (entry.IsFile()) {
525 		BString mimeString = _MIMEString(&ref);
526 		if (_IsMediaFile(mimeString)) {
527 			PlaylistItem* item = new (std::nothrow) FilePlaylistItem(ref);
528 			if (!_ExtraMediaExists(playlist, ref)) {
529 				_BindExtraMedia(item);
530 				if (item != NULL && !playlist->AddItem(item))
531 					delete item;
532 			} else
533 				delete item;
534 		} else
535 			printf("MIME Type = %s\n", mimeString.String());
536 	}
537 }
538 
539 
540 /*static*/ void
541 Playlist::AppendPlaylistToPlaylist(const entry_ref& ref, Playlist* playlist)
542 {
543 	BEntry entry(&ref, true);
544 	if (entry.InitCheck() != B_OK || !entry.Exists())
545 		return;
546 
547 	BString mimeString = _MIMEString(&ref);
548 	if (_IsTextPlaylist(mimeString)) {
549 		//printf("RunPlaylist thing\n");
550 		BFile file(&ref, B_READ_ONLY);
551 		FileReadWrite lineReader(&file);
552 
553 		BString str;
554 		entry_ref refPath;
555 		status_t err;
556 		BPath path;
557 		while (lineReader.Next(str)) {
558 			str = str.RemoveFirst("file://");
559 			str = str.RemoveLast("..");
560 			path = BPath(str.String());
561 			printf("Line %s\n", path.Path());
562 			if (path.Path() != NULL) {
563 				if ((err = get_ref_for_path(path.Path(), &refPath)) == B_OK) {
564 					PlaylistItem* item
565 						= new (std::nothrow) FilePlaylistItem(refPath);
566 					if (item == NULL || !playlist->AddItem(item))
567 						delete item;
568 				} else {
569 					printf("Error - %s: [%" B_PRIx32 "]\n", strerror(err),
570 						err);
571 				}
572 			} else
573 				printf("Error - No File Found in playlist\n");
574 		}
575 	} else if (_IsBinaryPlaylist(mimeString)) {
576 		BFile file(&ref, B_READ_ONLY);
577 		Playlist temp;
578 		if (temp.Unflatten(&file) == B_OK)
579 			playlist->AdoptPlaylist(temp, playlist->CountItems());
580 	}
581 }
582 
583 
584 /*static*/ void
585 Playlist::AppendQueryToPlaylist(const entry_ref& ref, Playlist* playlist)
586 {
587 	BQueryFile query(&ref);
588 	if (query.InitCheck() != B_OK)
589 		return;
590 
591 	entry_ref foundRef;
592 	while (query.GetNextRef(&foundRef) == B_OK) {
593 		PlaylistItem* item = new (std::nothrow) FilePlaylistItem(foundRef);
594 		if (item == NULL || !playlist->AddItem(item))
595 			delete item;
596 	}
597 }
598 
599 
600 void
601 Playlist::NotifyImportFailed()
602 {
603 	BAutolock _(this);
604 	_NotifyImportFailed();
605 }
606 
607 
608 /*static*/ bool
609 Playlist::ExtraMediaExists(Playlist* playlist, PlaylistItem* item)
610 {
611 	FilePlaylistItem* fileItem = dynamic_cast<FilePlaylistItem*>(item);
612 	if (fileItem != NULL)
613 		return _ExtraMediaExists(playlist, fileItem->Ref());
614 
615 	// If we are here let's see if it is an url
616 	UrlPlaylistItem* urlItem = dynamic_cast<UrlPlaylistItem*>(item);
617 	if (urlItem == NULL)
618 		return true;
619 
620 	return _ExtraMediaExists(playlist, urlItem->Url());
621 }
622 
623 
624 // #pragma mark - private
625 
626 
627 /*static*/ bool
628 Playlist::_ExtraMediaExists(Playlist* playlist, const entry_ref& ref)
629 {
630 	BString exceptExtension = _GetExceptExtension(BPath(&ref).Path());
631 
632 	for (int32 i = 0; i < playlist->CountItems(); i++) {
633 		FilePlaylistItem* compare = dynamic_cast<FilePlaylistItem*>(playlist->ItemAt(i));
634 		if (compare == NULL)
635 			continue;
636 		if (compare->Ref() != ref
637 				&& _GetExceptExtension(BPath(&compare->Ref()).Path()) == exceptExtension )
638 			return true;
639 	}
640 	return false;
641 }
642 
643 
644 /*static*/ bool
645 Playlist::_ExtraMediaExists(Playlist* playlist, BUrl url)
646 {
647 	for (int32 i = 0; i < playlist->CountItems(); i++) {
648 		UrlPlaylistItem* compare
649 			= dynamic_cast<UrlPlaylistItem*>(playlist->ItemAt(i));
650 		if (compare == NULL)
651 			continue;
652 		if (compare->Url() == url)
653 			return true;
654 	}
655 	return false;
656 }
657 
658 
659 /*static*/ bool
660 Playlist::_IsImageFile(const BString& mimeString)
661 {
662 	BMimeType superType;
663 	BMimeType fileType(mimeString.String());
664 
665 	if (fileType.GetSupertype(&superType) != B_OK)
666 		return false;
667 
668 	if (superType == "image")
669 		return true;
670 
671 	return false;
672 }
673 
674 
675 /*static*/ bool
676 Playlist::_IsMediaFile(const BString& mimeString)
677 {
678 	BMimeType superType;
679 	BMimeType fileType(mimeString.String());
680 
681 	if (fileType.GetSupertype(&superType) != B_OK)
682 		return false;
683 
684 	// try a shortcut first
685 	if (superType == "audio" || superType == "video")
686 		return true;
687 
688 	// Look through our supported types
689 	app_info appInfo;
690 	if (be_app->GetAppInfo(&appInfo) != B_OK)
691 		return false;
692 	BFile appFile(&appInfo.ref, B_READ_ONLY);
693 	if (appFile.InitCheck() != B_OK)
694 		return false;
695 	BMessage types;
696 	BAppFileInfo appFileInfo(&appFile);
697 	if (appFileInfo.GetSupportedTypes(&types) != B_OK)
698 		return false;
699 
700 	const char* type;
701 	for (int32 i = 0; types.FindString("types", i, &type) == B_OK; i++) {
702 		if (strcasecmp(mimeString.String(), type) == 0)
703 			return true;
704 	}
705 
706 	return false;
707 }
708 
709 
710 /*static*/ bool
711 Playlist::_IsTextPlaylist(const BString& mimeString)
712 {
713 	return mimeString.Compare(kTextPlaylistMimeString) == 0;
714 }
715 
716 
717 /*static*/ bool
718 Playlist::_IsBinaryPlaylist(const BString& mimeString)
719 {
720 	return mimeString.Compare(kBinaryPlaylistMimeString) == 0;
721 }
722 
723 
724 /*static*/ bool
725 Playlist::_IsPlaylist(const BString& mimeString)
726 {
727 	return _IsTextPlaylist(mimeString) || _IsBinaryPlaylist(mimeString);
728 }
729 
730 
731 /*static*/ bool
732 Playlist::_IsQuery(const BString& mimeString)
733 {
734 	return mimeString.Compare(BQueryFile::MimeType()) == 0;
735 }
736 
737 
738 /*static*/ BString
739 Playlist::_MIMEString(const entry_ref* ref)
740 {
741 	BFile file(ref, B_READ_ONLY);
742 	BNodeInfo nodeInfo(&file);
743 	char mimeString[B_MIME_TYPE_LENGTH];
744 	if (nodeInfo.GetType(mimeString) != B_OK) {
745 		BMimeType type;
746 		if (BMimeType::GuessMimeType(ref, &type) != B_OK)
747 			return BString();
748 
749 		strlcpy(mimeString, type.Type(), B_MIME_TYPE_LENGTH);
750 		nodeInfo.SetType(type.Type());
751 	}
752 	return BString(mimeString);
753 }
754 
755 
756 // _BindExtraMedia() searches additional videos and audios
757 // and addes them as extra medias.
758 /*static*/ void
759 Playlist::_BindExtraMedia(PlaylistItem* item)
760 {
761 	FilePlaylistItem* fileItem = dynamic_cast<FilePlaylistItem*>(item);
762 	if (!fileItem)
763 		return;
764 
765 	// If the media file is foo.mp3, _BindExtraMedia() searches foo.avi.
766 	BPath mediaFilePath(&fileItem->Ref());
767 	BString mediaFilePathString = mediaFilePath.Path();
768 	BPath dirPath;
769 	mediaFilePath.GetParent(&dirPath);
770 	BDirectory dir(dirPath.Path());
771 	if (dir.InitCheck() != B_OK)
772 		return;
773 
774 	BEntry entry;
775 	BString entryPathString;
776 	while (dir.GetNextEntry(&entry, true) == B_OK) {
777 		if (!entry.IsFile())
778 			continue;
779 		entryPathString = BPath(&entry).Path();
780 		if (entryPathString != mediaFilePathString
781 				&& _GetExceptExtension(entryPathString) == _GetExceptExtension(mediaFilePathString)) {
782 			_BindExtraMedia(fileItem, entry);
783 		}
784 	}
785 }
786 
787 
788 /*static*/ void
789 Playlist::_BindExtraMedia(FilePlaylistItem* fileItem, const BEntry& entry)
790 {
791 	entry_ref ref;
792 	entry.GetRef(&ref);
793 	BString mimeString = _MIMEString(&ref);
794 	if (_IsMediaFile(mimeString)) {
795 		fileItem->AddRef(ref);
796 	} else if (_IsImageFile(mimeString)) {
797 		fileItem->AddImageRef(ref);
798 	}
799 }
800 
801 
802 /*static*/ BString
803 Playlist::_GetExceptExtension(const BString& path)
804 {
805 	int32 periodPos = path.FindLast('.');
806 	if (periodPos <= path.FindLast('/'))
807 		return path;
808 	return BString(path.String(), periodPos);
809 }
810 
811 
812 // #pragma mark - notifications
813 
814 
815 void
816 Playlist::_NotifyItemAdded(PlaylistItem* item, int32 index) const
817 {
818 	BList listeners(fListeners);
819 	int32 count = listeners.CountItems();
820 	for (int32 i = 0; i < count; i++) {
821 		Listener* listener = (Listener*)listeners.ItemAtFast(i);
822 		listener->ItemAdded(item, index);
823 	}
824 }
825 
826 
827 void
828 Playlist::_NotifyItemRemoved(int32 index) const
829 {
830 	BList listeners(fListeners);
831 	int32 count = listeners.CountItems();
832 	for (int32 i = 0; i < count; i++) {
833 		Listener* listener = (Listener*)listeners.ItemAtFast(i);
834 		listener->ItemRemoved(index);
835 	}
836 }
837 
838 
839 void
840 Playlist::_NotifyItemsSorted() const
841 {
842 	BList listeners(fListeners);
843 	int32 count = listeners.CountItems();
844 	for (int32 i = 0; i < count; i++) {
845 		Listener* listener = (Listener*)listeners.ItemAtFast(i);
846 		listener->ItemsSorted();
847 	}
848 }
849 
850 
851 void
852 Playlist::_NotifyCurrentItemChanged(int32 newIndex, bool play) const
853 {
854 	BList listeners(fListeners);
855 	int32 count = listeners.CountItems();
856 	for (int32 i = 0; i < count; i++) {
857 		Listener* listener = (Listener*)listeners.ItemAtFast(i);
858 		listener->CurrentItemChanged(newIndex, play);
859 	}
860 }
861 
862 
863 void
864 Playlist::_NotifyImportFailed() const
865 {
866 	BList listeners(fListeners);
867 	int32 count = listeners.CountItems();
868 	for (int32 i = 0; i < count; i++) {
869 		Listener* listener = (Listener*)listeners.ItemAtFast(i);
870 		listener->ImportFailed();
871 	}
872 }
873