iTunesRemote.m

   1 #import "iTunesRemote.h"
   2
   3 @implementation iTunesRemote
   4
   5 + (id)remote
   6 {
   7     return [[[iTunesRemote alloc] init] autorelease];
   8 }
   9
  10 - (NSString *)title
  11 {
  12     return @"iTunes Plug-in";
  13 }
  14
  15 - (NSString *)information;
  16 {
  17     return @"Default MenuTunes plugin to control iTunes.";
  18 }
  19
  20 - (NSImage *)icon
  21 {
  22     return nil;
  23 }
  24
  25 - (BOOL)begin
  26 {
  27     iTunesPSN = [self iTunesPSN];
  28     asComponent = OpenDefaultComponent(kOSAComponentType, kAppleScriptSubtype);
  29
  30     //Register for application termination in NSWorkspace
  31     [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:self selector:@selector(applicationLaunched:) name:NSWorkspaceDidLaunchApplicationNotification object:nil];
  32     [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:self selector:@selector(applicationTerminated:) name:NSWorkspaceDidTerminateApplicationNotification object:nil];
  33
  34     NSLog(@"iTunes Plugin loaded");
  35     return YES;
  36 }
  37
  38 - (BOOL)halt
  39 {
  40     iTunesPSN.highLongOfPSN = kNoProcess;
  41     CloseComponent(asComponent);
  42
  43     //Unregister for application termination in NSWorkspace
  44     [[[NSWorkspace sharedWorkspace] notificationCenter] removeObserver:self];
  45
  46     return YES;
  47 }
  48
  49 - (void)applicationLaunched:(NSNotification *)note
  50 {
  51     NSDictionary *info = [note userInfo];
  52
  53     if ([[info objectForKey:@"NSApplicationName"] isEqualToString:@"iTunes"]) {
  54         iTunesPSN.highLongOfPSN = [[info objectForKey:@"NSApplicationProcessSerialNumberHigh"] longValue];
  55         iTunesPSN.lowLongOfPSN = [[info objectForKey:@"NSApplicationProcessSerialNumberLow"] longValue];
  56
  57         [[NSNotificationCenter defaultCenter] postNotificationName:@"ITMTRemoteAppDidLaunchNotification" object:nil];
  58     }
  59 }
  60
  61 - (void)applicationTerminated:(NSNotification *)note
  62 {
  63     NSDictionary *info = [note userInfo];
  64
  65     if ([[info objectForKey:@"NSApplicationName"] isEqualToString:@"iTunes"]) {
  66         iTunesPSN.highLongOfPSN = kNoProcess;
  67         [[NSNotificationCenter defaultCenter] postNotificationName:@"ITMTRemoteAppDidTerminateNotification" object:nil];
  68     }
  69 }
  70
  71 - (PlayerState)playerState
  72 {
  73     NSString *result = [self runScriptAndReturnResult:@"get player state"];
  74
  75     if ([result isEqualToString:@"playing"]) {
  76         return playing;
  77     } else if ([result isEqualToString:@"paused"]) {
  78         return paused;
  79     } else if ([result isEqualToString:@"stopped"]) {
  80         return stopped;
  81     } else if ([result isEqualToString:@"rewinding"]) {
  82         return rewinding;
  83     } else if ([result isEqualToString:@"fast forwarding"]) {
  84         return forwarding;
  85     }
  86
  87     return stopped;
  88 }
  89
  90 - (NSArray *)playlists
  91 {
  92     int i;
  93     int numPresets = [[self runScriptAndReturnResult:@"get number of playlists"] intValue];
  94     NSMutableArray *presets = [[NSMutableArray alloc] init];
  95
  96     for (i = 0; i < numPresets; i++) {
  97         [presets addObject:[self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of playlist %i", i]]];
  98     }
  99
 100     return [NSArray arrayWithArray:presets];
 101 }
 102
 103 - (int)numberOfSongsInPlaylistAtIndex:(int)index
 104 {
 105     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get number of tracks in playlist %i", index]];
 106     return [result intValue];
 107 }
 108
 109 - (NSString *)classOfPlaylistAtIndex:(int)index
 110 {
 111     //Not working yet. It returns the 4 character code instead of a name.
 112     /*NSString *result;
 113     result = [[ITAppleEventCenter sharedCenter]
 114                 sendTwoTierAEWithRequestedKey:@"pcls"
 115                 fromObjectByKey:@"pPla" eventClass:@"core" eventID:@"getd"
 116                 appPSN:[self iTunesPSN]];*/
 117     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get class of playlist %i", index]];
 118     return result;
 119 }
 120
 121 - (int)currentPlaylistIndex
 122 {
 123     int result;
 124     result = [[ITAppleEventCenter sharedCenter]
 125                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
 126                 fromObjectByKey:@"pPla" eventClass:@"core" eventID:@"getd"
 127                 appPSN:[self iTunesPSN]];
 128     return result;
 129 }
 130
 131 - (NSString *)songTitleAtIndex:(int)index
 132 {
 133     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of track %i of current playlist", index]];
 134     return result;
 135 }
 136
 137 - (int)currentSongIndex
 138 {
 139     int result;
 140     result = [[ITAppleEventCenter sharedCenter]
 141                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
 142                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 143                 appPSN:[self iTunesPSN]];
 144     return result;
 145 }
 146
 147 - (NSString *)currentSongTitle
 148 {
 149     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pnam"
 150                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 151                 appPSN:[self iTunesPSN]];
 152 }
 153
 154 - (NSString *)currentSongArtist
 155 {
 156     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pArt"
 157                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 158                 appPSN:[self iTunesPSN]];
 159 }
 160
 161 - (NSString *)currentSongAlbum
 162 {
 163     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pAlb"
 164                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 165                 appPSN:[self iTunesPSN]];
 166 }
 167
 168 - (NSString *)currentSongGenre
 169 {
 170     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pGen"
 171                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 172                 appPSN:[self iTunesPSN]];
 173 }
 174
 175 - (NSString *)currentSongLength
 176 {
 177     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pTim"
 178                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 179                 appPSN:[self iTunesPSN]];
 180 }
 181
 182 - (NSString *)currentSongRemaining
 183 {
 184     long duration = [[ITAppleEventCenter sharedCenter]
 185                         sendTwoTierAEWithRequestedKeyForNumber:@"pDur"
 186                         fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 187                         appPSN:[self iTunesPSN]];
 188     long current = [[ITAppleEventCenter sharedCenter]
 189                         sendAEWithRequestedKeyForNumber:@"pPos"
 190                         eventClass:@"core" eventID:@"getd"
 191                         appPSN:[self iTunesPSN]];
 192
 193     return [[NSNumber numberWithLong:duration - current] stringValue];
 194 }
 195
 196 - (NSArray *)eqPresets;
 197 {
 198     int i;
 199     int numPresets = [[self runScriptAndReturnResult:@"get number of EQ presets"] intValue];
 200     NSMutableArray *presets = [[NSMutableArray alloc] init];
 201
 202     for (i = 0; i < numPresets; i++) {
 203         [presets addObject:[self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of EQ preset %i", i]]];
 204     }
 205
 206     return [NSArray arrayWithArray:presets];
 207 }
 208
 209 - (int)currentEQPresetIndex
 210 {
 211     int result;
 212     result = [[ITAppleEventCenter sharedCenter]
 213                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
 214                 fromObjectByKey:@"pEQP" eventClass:@"core" eventID:@"getd"
 215                 appPSN:[self iTunesPSN]];
 216     return result;
 217 }
 218
 219 - (BOOL)play
 220 {
 221     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Play"
 222             appPSN:[self iTunesPSN]];
 223     return YES;
 224 }
 225
 226 - (BOOL)pause
 227 {
 228     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Paus"
 229             appPSN:[self iTunesPSN]];
 230     return YES;
 231 }
 232
 233 - (BOOL)goToNextSong
 234 {
 235     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Next"
 236             appPSN:[self iTunesPSN]];
 237     return YES;
 238 }
 239
 240 - (BOOL)goToPreviousSong
 241 {
 242     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Prev"
 243             appPSN:[self iTunesPSN]];
 244     return YES;
 245 }
 246
 247 - (BOOL)fastForward
 248 {
 249     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Fast"
 250             appPSN:[self iTunesPSN]];
 251     return YES;
 252 }
 253
 254 - (BOOL)rewind
 255 {
 256     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Rwnd"
 257             appPSN:[self iTunesPSN]];
 258     return YES;
 259 }
 260
 261
 262 - (BOOL)switchToPlaylistAtIndex:(int)index
 263 {
 264     [self runScriptAndReturnResult:[NSString stringWithFormat:
 265         @"play playlist %i", index]];
 266     return NO;
 267 }
 268
 269 - (BOOL)switchToSongAtIndex:(int)index
 270 {
 271     [self runScriptAndReturnResult:[NSString stringWithFormat:
 272         @"play track %i of current playlist", index]];
 273     return NO;
 274 }
 275
 276 - (BOOL)switchToEQAtIndex:(int)index
 277 {
 278     [self runScriptAndReturnResult:[NSString stringWithFormat:
 279         @"set current EQ preset to EQ preset %i", index]];
 280     [self runScriptAndReturnResult:@"set EQ enabled to 1"];
 281     return NO;
 282 }
 283
 284 - (ProcessSerialNumber)iTunesPSN
 285 {
 286     NSArray *apps = [[NSWorkspace sharedWorkspace] launchedApplications];
 287     ProcessSerialNumber number;
 288     int i;
 289
 290     number.highLongOfPSN = kNoProcess;
 291
 292     for (i = 0; i < [apps count]; i++)
 293     {
 294         NSDictionary *curApp = [apps objectAtIndex:i];
 295
 296         if ([[curApp objectForKey:@"NSApplicationName"] isEqualToString:@"iTunes"])
 297         {
 298             number.highLongOfPSN = [[curApp objectForKey:@"NSApplicationProcessSerialNumberHigh"] intValue];
 299             number.lowLongOfPSN = [[curApp objectForKey:@"NSApplicationProcessSerialNumberLow"] intValue];
 300         }
 301     }
 302     return number;
 303 }
 304
 305 - (NSString *)runScriptAndReturnResult:(NSString *)script
 306 {
 307     AEDesc scriptDesc, resultDesc;
 308     Size length;
 309     NSString *result;
 310     Ptr buffer;
 311
 312     script = [NSString stringWithFormat:@"tell application \"iTunes\"\n%@\nend tell", script];
 313
 314     AECreateDesc(typeChar, [script cString], [script cStringLength],
 315 &scriptDesc);
 316
 317     OSADoScript(asComponent, &scriptDesc, kOSANullScript, typeChar, kOSAModeCanInteract, &resultDesc);
 318
 319     length = AEGetDescDataSize(&resultDesc);
 320     buffer = malloc(length);
 321
 322     AEGetDescData(&resultDesc, buffer, length);
 323     AEDisposeDesc(&scriptDesc);
 324     AEDisposeDesc(&resultDesc);
 325     result = [NSString stringWithCString:buffer length:length];
 326     if ( (! [result isEqualToString:@""])      &&
 327          ([result characterAtIndex:0] == '\"') &&
 328          ([result characterAtIndex:[result length] - 1] == '\"') ) {
 329         result = [result substringWithRange:NSMakeRange(1, [result length] - 2)];
 330     }
 331     free(buffer);
 332     buffer = nil;
 333     return result;
 334 }
 335
 336 @end