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
  32     NSLog(@"iTunes Plugin loaded");
  33     return YES;
  34 }
  35
  36 - (BOOL)halt
  37 {
  38     iTunesPSN.highLongOfPSN = kNoProcess;
  39     CloseComponent(asComponent);
  40
  41     //Unregister for application termination in NSWorkspace
  42     return YES;
  43 }
  44
  45 - (NSArray *)playlists
  46 {
  47     int i;
  48     int numPresets = [[self runScriptAndReturnResult:@"get number of playlists"] intValue];
  49     NSMutableArray *presets = [[NSMutableArray alloc] init];
  50
  51     for (i = 0; i < numPresets; i++) {
  52         [presets addObject:[self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of playlist %i", i]]];
  53     }
  54
  55     return [NSArray arrayWithArray:presets];
  56 }
  57
  58 - (int)numberOfSongsInPlaylistAtIndex:(int)index
  59 {
  60     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get number of tracks in playlist %i", index]];
  61     return [result intValue];
  62 }
  63
  64 - (NSString *)classOfPlaylistAtIndex:(int)index
  65 {
  66     //Not working yet. It returns the 4 character code instead of a name.
  67     /*NSString *result;
  68     result = [[ITAppleEventCenter sharedCenter]
  69                 sendTwoTierAEWithRequestedKey:@"pcls"
  70                 fromObjectByKey:@"pPla" eventClass:@"core" eventID:@"getd"
  71                 appPSN:[self iTunesPSN]];*/
  72     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get class of playlist %i", index]];
  73     return result;
  74 }
  75
  76 - (int)currentPlaylistIndex
  77 {
  78     int result;
  79     result = [[ITAppleEventCenter sharedCenter]
  80                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
  81                 fromObjectByKey:@"pPla" eventClass:@"core" eventID:@"getd"
  82                 appPSN:[self iTunesPSN]];
  83     return result;
  84 }
  85
  86 - (NSString *)songTitleAtIndex:(int)index
  87 {
  88     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of track %i of current playlist", index]];
  89     return result;
  90 }
  91
  92 - (int)currentSongIndex
  93 {
  94     int result;
  95     result = [[ITAppleEventCenter sharedCenter]
  96                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
  97                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
  98                 appPSN:[self iTunesPSN]];
  99     return result;
 100 }
 101
 102 - (NSString *)currentSongTitle
 103 {
 104     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pnam"
 105                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 106                 appPSN:[self iTunesPSN]];
 107 }
 108
 109 - (NSString *)currentSongArtist
 110 {
 111     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pArt"
 112                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 113                 appPSN:[self iTunesPSN]];
 114 }
 115
 116 - (NSString *)currentSongAlbum
 117 {
 118     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pAlb"
 119                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 120                 appPSN:[self iTunesPSN]];
 121 }
 122
 123 - (NSString *)currentSongGenre
 124 {
 125     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pGen"
 126                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 127                 appPSN:[self iTunesPSN]];
 128 }
 129
 130 - (NSString *)currentSongLength
 131 {
 132     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pTim"
 133                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 134                 appPSN:[self iTunesPSN]];
 135 }
 136
 137 - (NSString *)currentSongRemaining
 138 {
 139     long duration = [[ITAppleEventCenter sharedCenter]
 140                         sendTwoTierAEWithRequestedKeyForNumber:@"pDur"
 141                         fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 142                         appPSN:[self iTunesPSN]];
 143     long current = [[ITAppleEventCenter sharedCenter]
 144                         sendAEWithRequestedKeyForNumber:@"pPos"
 145                         eventClass:@"core" eventID:@"getd"
 146                         appPSN:[self iTunesPSN]];
 147
 148     return [[NSNumber numberWithLong:duration - current] stringValue];
 149 }
 150
 151 - (NSArray *)eqPresets;
 152 {
 153     int i;
 154     int numPresets = [[self runScriptAndReturnResult:@"get number of EQ presets"] intValue];
 155     NSMutableArray *presets = [[NSMutableArray alloc] init];
 156
 157     for (i = 0; i < numPresets; i++) {
 158         [presets addObject:[self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of EQ preset %i", i]]];
 159     }
 160
 161     return [NSArray arrayWithArray:presets];
 162 }
 163
 164 - (int)currentEQPresetIndex
 165 {
 166     int result;
 167     result = [[ITAppleEventCenter sharedCenter]
 168                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
 169                 fromObjectByKey:@"pEQP" eventClass:@"core" eventID:@"getd"
 170                 appPSN:[self iTunesPSN]];
 171     return result;
 172 }
 173
 174 - (BOOL)play
 175 {
 176     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Play"
 177             appPSN:[self iTunesPSN]];
 178     return YES;
 179 }
 180
 181 - (BOOL)pause
 182 {
 183     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Paus"
 184             appPSN:[self iTunesPSN]];
 185     return YES;
 186 }
 187
 188 - (BOOL)goToNextSong
 189 {
 190     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Next"
 191             appPSN:[self iTunesPSN]];
 192     return YES;
 193 }
 194
 195 - (BOOL)goToPreviousSong
 196 {
 197     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Prev"
 198             appPSN:[self iTunesPSN]];
 199     return YES;
 200 }
 201
 202 - (BOOL)switchToPlaylistAtIndex:(int)index
 203 {
 204     [self runScriptAndReturnResult:[NSString stringWithFormat:
 205         @"play playlist %i", index]];
 206     return NO;
 207 }
 208
 209 - (BOOL)switchToSongAtIndex:(int)index
 210 {
 211     [self runScriptAndReturnResult:[NSString stringWithFormat:
 212         @"play track %i of current playlist", index]];
 213     return NO;
 214 }
 215
 216 - (BOOL)switchToEQAtIndex:(int)index
 217 {
 218     [self runScriptAndReturnResult:[NSString stringWithFormat:
 219         @"set current EQ preset to EQ preset %i", index]];
 220     [self runScriptAndReturnResult:@"set EQ enabled to 1"];
 221     return NO;
 222 }
 223
 224 - (ProcessSerialNumber)iTunesPSN
 225 {
 226     NSArray *apps = [[NSWorkspace sharedWorkspace] launchedApplications];
 227     ProcessSerialNumber number;
 228     int i;
 229
 230     number.highLongOfPSN = kNoProcess;
 231
 232     for (i = 0; i < [apps count]; i++)
 233     {
 234         NSDictionary *curApp = [apps objectAtIndex:i];
 235
 236         if ([[curApp objectForKey:@"NSApplicationName"] isEqualToString:@"iTunes"])
 237         {
 238             number.highLongOfPSN = [[curApp objectForKey:@"NSApplicationProcessSerialNumberHigh"] intValue];
 239             number.lowLongOfPSN = [[curApp objectForKey:@"NSApplicationProcessSerialNumberLow"] intValue];
 240         }
 241     }
 242     return number;
 243 }
 244
 245 - (NSString *)runScriptAndReturnResult:(NSString *)script
 246 {
 247     AEDesc scriptDesc, resultDesc;
 248     Size length;
 249     NSString *result;
 250     Ptr buffer;
 251
 252     script = [NSString stringWithFormat:@"tell application \"iTunes\"\n%@\nend tell", script];
 253
 254     AECreateDesc(typeChar, [script cString], [script cStringLength],
 255 &scriptDesc);
 256
 257     OSADoScript(asComponent, &scriptDesc, kOSANullScript, typeChar, kOSAModeCanInteract, &resultDesc);
 258
 259     length = AEGetDescDataSize(&resultDesc);
 260     buffer = malloc(length);
 261
 262     AEGetDescData(&resultDesc, buffer, length);
 263     AEDisposeDesc(&scriptDesc);
 264     AEDisposeDesc(&resultDesc);
 265     result = [NSString stringWithCString:buffer length:length];
 266     if ( (! [result isEqualToString:@""])      &&
 267          ([result characterAtIndex:0] == '\"') &&
 268          ([result characterAtIndex:[result length] - 1] == '\"') ) {
 269         result = [result substringWithRange:NSMakeRange(1, [result length] - 2)];
 270     }
 271     free(buffer);
 272     buffer = nil;
 273     return result;
 274 }
 275
 276 @end