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macosx/framework: Implement write KVC for VLCMediaList.
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1 /*****************************************************************************
2  * VLCMediaList.m: VLCKit.framework VLCMediaList implementation
3  *****************************************************************************
4  * Copyright (C) 2007 Pierre d'Herbemont
5  * Copyright (C) 2007 the VideoLAN team
6  * $Id$
7  *
8  * Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23  *****************************************************************************/
24
25 #import "VLCMediaList.h"
26 #import "VLCLibrary.h"
27 #import "VLCEventManager.h"
28 #import "VLCLibVLCBridging.h"
29 #ifdef HAVE_CONFIG_H
30 # include "config.h"
31 #endif
32
33 #include <vlc/vlc.h>
34 #include <vlc/libvlc.h>
35
36 /* Notification Messages */
37 NSString * VLCMediaListItemAdded        = @"VLCMediaListItemAdded";
38 NSString * VLCMediaListItemDeleted      = @"VLCMediaListItemDeleted";
39
40 // TODO: Documentation
41 @interface VLCMediaList (Private)
42 /* Initializers */
43 - (void)initInternalMediaList;
44
45 /* Libvlc event bridges */
46 - (void)mediaListItemAdded:(NSArray *)args;
47 - (void)mediaListItemRemoved:(NSNumber *)index;
48 @end
49
50 /* libvlc event callback */
51 static void HandleMediaListItemAdded(const libvlc_event_t * event, void * user_data)
52 {
53     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
54     id self = user_data;
55     [[VLCEventManager sharedManager] callOnMainThreadObject:self
56                                                  withMethod:@selector(mediaListItemAdded:)
57                                        withArgumentAsObject:[NSArray arrayWithObject:[NSDictionary dictionaryWithObjectsAndKeys:
58                                                           [VLCMedia mediaWithLibVLCMediaDescriptor:event->u.media_list_item_added.item], @"media",
59                                                           [NSNumber numberWithInt:event->u.media_list_item_added.index], @"index",
60                                                           nil]]];
61     [pool release];
62 }
63
64 static void HandleMediaListItemDeleted( const libvlc_event_t * event, void * user_data)
65 {
66     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
67     id self = user_data;
68     [[VLCEventManager sharedManager] callOnMainThreadObject:self
69                                                  withMethod:@selector(mediaListItemRemoved:)
70                                        withArgumentAsObject:[NSNumber numberWithInt:event->u.media_list_item_deleted.index]];
71     [pool release];
72 }
73
74 @implementation VLCMediaList
75 - (id)init
76 {
77     if (self = [super init])
78     {
79         // Create a new libvlc media list instance
80         libvlc_exception_t p_e;
81         libvlc_exception_init( &p_e );
82         p_mlist = libvlc_media_list_new( [VLCLibrary sharedInstance], &p_e );
83         catch_exception( &p_e );
84
85         // Initialize internals to defaults
86         cachedMedia = [[NSMutableArray alloc] init];
87         delegate = flatAspect = hierarchicalAspect = hierarchicalNodeAspect = nil;
88         [self initInternalMediaList];
89     }
90     return self;
91 }
92
93 - (void)release
94 {
95     @synchronized(self)
96     {
97         if([self retainCount] <= 1)
98         {
99             /* We must make sure we won't receive new event after an upcoming dealloc
100              * We also may receive a -retain in some event callback that may occcur
101              * Before libvlc_event_detach. So this can't happen in dealloc */
102             libvlc_event_manager_t * p_em = libvlc_media_list_event_manager(p_mlist);
103             libvlc_event_detach(p_em, libvlc_MediaListItemDeleted, HandleMediaListItemDeleted, self);
104             libvlc_event_detach(p_em, libvlc_MediaListItemAdded,   HandleMediaListItemAdded,   self);
105         }
106         [super release];
107     }
108 }
109
110 - (void)dealloc
111 {
112     // Release allocated memory
113     delegate = nil;
114
115     libvlc_media_list_release( p_mlist );
116     [cachedMedia release];
117     [flatAspect release];
118     [hierarchicalAspect release];
119     [hierarchicalNodeAspect release];
120     [super dealloc];
121 }
122
123 - (NSString *)description
124 {
125     NSMutableString * content = [NSMutableString string];
126     int i;
127     for( i = 0; i < [self count]; i++)
128     {
129         [content appendFormat:@"%@\n", [self mediaAtIndex: i]];
130     }
131     return [NSString stringWithFormat:@"<%@ %p> {\n%@}", [self className], self, content];
132 }
133
134 - (void)lock
135 {
136     libvlc_media_list_lock( p_mlist );
137 }
138
139 - (void)unlock
140 {
141     libvlc_media_list_unlock( p_mlist );
142 }
143
144 - (NSInteger)addMedia:(VLCMedia *)media
145 {
146     int index = [self count];
147     [self insertMedia:media atIndex:index];
148     return index;
149 }
150
151 - (void)insertMedia:(VLCMedia *)media atIndex: (NSInteger)index
152 {
153     [media retain];
154
155     // Add it to the libvlc's medialist
156     libvlc_exception_t p_e;
157     libvlc_exception_init( &p_e );
158     libvlc_media_list_insert_media( p_mlist, [media libVLCMediaDescriptor], index, &p_e );
159     catch_exception( &p_e );
160 }
161
162 - (void)removeMediaAtIndex:(NSInteger)index
163 {
164     [[self mediaAtIndex:index] release];
165
166     // Remove it from the libvlc's medialist
167     libvlc_exception_t p_e;
168     libvlc_exception_init( &p_e );
169     libvlc_media_list_remove_index( p_mlist, index, &p_e );
170     catch_exception( &p_e );
171 }
172
173 - (VLCMedia *)mediaAtIndex:(NSInteger)index
174 {
175     return [cachedMedia objectAtIndex:index];
176 }
177
178 - (NSInteger)indexOfMedia:(VLCMedia *)media
179 {
180     NSInteger result = libvlc_media_list_index_of_item(p_mlist, [media libVLCMediaDescriptor]);
181     return result;
182 }
183
184 /* KVC Compliance: For the @"media" key */
185 - (NSInteger)countOfMedia
186 {
187     return [self count];
188 }
189
190 - (id)objectInMediaAtIndex:(NSUInteger)i
191 {
192     return [self mediaAtIndex:i];
193 }
194
195 - (NSInteger)count
196 {
197     return [cachedMedia count];
198 }
199
200 - (void)insertObject:(id)object inMediaAtIndex:(NSUInteger)i
201 {
202     [self insertMedia:object atIndex:i];
203 }
204
205 - (void)removeObjectFromMediaAtIndex:(NSUInteger)i
206 {
207     [self removeMediaAtIndex:i];
208 }
209
210 @synthesize delegate;
211
212 - (BOOL)isReadOnly
213 {
214     libvlc_exception_t p_e;
215     libvlc_exception_init( &p_e );
216     BOOL isReadOnly = libvlc_media_list_is_readonly( p_mlist );
217     catch_exception( &p_e );
218
219     return isReadOnly;
220 }
221
222 /* Media list aspect */
223 - (VLCMediaListAspect *)hierarchicalAspect
224 {
225     if( hierarchicalAspect )
226         return hierarchicalAspect;
227
228     libvlc_media_list_view_t * p_mlv = libvlc_media_list_hierarchical_view( p_mlist, NULL );
229     hierarchicalAspect = [[VLCMediaListAspect mediaListAspectWithLibVLCMediaListView:p_mlv andMediaList:self] retain];
230     libvlc_media_list_view_release( p_mlv );
231     return hierarchicalAspect;
232 }
233
234 - (VLCMediaListAspect *)hierarchicalNodeAspect
235 {
236     if( hierarchicalNodeAspect )
237         return hierarchicalNodeAspect;
238
239     libvlc_media_list_view_t * p_mlv = libvlc_media_list_hierarchical_node_view( p_mlist, NULL );
240     hierarchicalNodeAspect = [[VLCMediaListAspect mediaListAspectWithLibVLCMediaListView:p_mlv andMediaList:self] retain];
241     libvlc_media_list_view_release( p_mlv );
242     return hierarchicalNodeAspect;
243 }
244
245 - (VLCMediaListAspect *)flatAspect
246 {
247     if( flatAspect )
248         return flatAspect;
249
250     libvlc_media_list_view_t * p_mlv = libvlc_media_list_flat_view( p_mlist, NULL );
251     flatAspect = [[VLCMediaListAspect mediaListAspectWithLibVLCMediaListView:p_mlv andMediaList:self] retain];
252     libvlc_media_list_view_release( p_mlv );
253     return flatAspect;
254 }
255
256 @end
257
258 @implementation VLCMediaList (LibVLCBridging)
259 + (id)mediaListWithLibVLCMediaList:(void *)p_new_mlist;
260 {
261     return [[[VLCMediaList alloc] initWithLibVLCMediaList:p_new_mlist] autorelease];
262 }
263
264 - (id)initWithLibVLCMediaList:(void *)p_new_mlist;
265 {
266     if( self = [super init] )
267     {
268         p_mlist = p_new_mlist;
269         libvlc_media_list_retain( p_mlist );
270         libvlc_media_list_lock( p_mlist );
271         cachedMedia = [[NSMutableArray alloc] initWithCapacity:libvlc_media_list_count(p_mlist)];
272
273         NSUInteger i, count = libvlc_media_list_count(p_mlist);
274         for( i = 0; i < count; i++ )
275         {
276             libvlc_media_t * p_md = libvlc_media_list_item_at_index( p_mlist, i, NULL );
277             [cachedMedia addObject:[VLCMedia mediaWithLibVLCMediaDescriptor:p_md]];
278             libvlc_media_release(p_md);
279         }
280         [self initInternalMediaList];
281         libvlc_media_list_unlock(p_mlist);
282     }
283     return self;
284 }
285
286 - (void *)libVLCMediaList
287 {
288     return p_mlist;
289 }
290 @end
291
292 @implementation VLCMediaList (Private)
293 - (void)initInternalMediaList
294 {
295     // Add event callbacks
296     libvlc_exception_t p_e;
297     libvlc_exception_init( &p_e );
298
299     libvlc_event_manager_t * p_em = libvlc_media_list_event_manager(p_mlist);
300     libvlc_event_attach( p_em, libvlc_MediaListItemAdded,   HandleMediaListItemAdded,   self, &p_e );
301     libvlc_event_attach( p_em, libvlc_MediaListItemDeleted, HandleMediaListItemDeleted, self, &p_e );
302
303     catch_exception( &p_e );
304 }
305
306 - (void)mediaListItemAdded:(NSArray *)arrayOfArgs
307 {
308     /* We hope to receive index in a nide range, that could change one day */
309     NSInteger start = [[[arrayOfArgs objectAtIndex: 0] objectForKey:@"index"] intValue];
310     NSInteger end = [[[arrayOfArgs objectAtIndex: [arrayOfArgs count]-1] objectForKey:@"index"] intValue];
311     NSRange range = NSMakeRange(start, end-start);
312
313     [self willChange:NSKeyValueChangeInsertion valuesAtIndexes:[NSIndexSet indexSetWithIndexesInRange:range] forKey:@"media"];
314     for( NSDictionary * args in arrayOfArgs )
315     {
316         NSInteger index = [[args objectForKey:@"index"] intValue];
317         VLCMedia * media = [args objectForKey:@"media"];
318         /* Sanity check */
319         if( index && index > [cachedMedia count] )
320             index = [cachedMedia count];
321         [cachedMedia insertObject:media atIndex:index];
322     }
323     [self didChange:NSKeyValueChangeInsertion valuesAtIndexes:[NSIndexSet indexSetWithIndexesInRange:range] forKey:@"media"];
324
325     // Post the notification
326 //    [[NSNotificationCenter defaultCenter] postNotificationName:VLCMediaListItemAdded
327 //                                                        object:self
328 //                                                      userInfo:args];
329
330     // Let the delegate know that the item was added
331   //  if (delegate && [delegate respondsToSelector:@selector(mediaList:mediaAdded:atIndex:)])
332     //    [delegate mediaList:self mediaAdded:media atIndex:index];
333 }
334
335 - (void)mediaListItemRemoved:(NSNumber *)index
336 {
337     [self willChange:NSKeyValueChangeInsertion valuesAtIndexes:[NSIndexSet indexSetWithIndex:[index intValue]] forKey:@"media"];
338     [cachedMedia removeObjectAtIndex:[index intValue]];
339     [self didChange:NSKeyValueChangeInsertion valuesAtIndexes:[NSIndexSet indexSetWithIndex:[index intValue]] forKey:@"media"];
340
341     // Post the notification
342     [[NSNotificationCenter defaultCenter] postNotificationName:VLCMediaListItemDeleted
343                                                         object:self
344                                                       userInfo:[NSDictionary dictionaryWithObjectsAndKeys:
345                                                           index, @"index",
346                                                           nil]];
347
348     // Let the delegate know that the item is being removed
349     if (delegate && [delegate respondsToSelector:@selector(mediaList:mediaRemovedAtIndex:)])
350         [delegate mediaList:self mediaRemovedAtIndex:[index intValue]];
351 }
352 @end