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 - (int)numberOfPlaylists
  46 {
  47     NSString *result = [self runScriptAndReturnResult:@"get number of playlists"];
  48     return [result intValue];
  49 }
  50
  51 - (int)numberOfSongsInPlaylistAtIndex:(int)index
  52 {
  53     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get number of tracks in playlist %i", index]];
  54     return [result intValue];
  55 }
  56
  57 - (NSString *)classOfPlaylistAtIndex:(int)index
  58 {
  59     //Not working yet. It returns the 4 character code instead of a name.
  60     /*NSString *result;
  61     result = [[ITAppleEventCenter sharedCenter]
  62                 sendTwoTierAEWithRequestedKey:@"pcls"
  63                 fromObjectByKey:@"pPla" eventClass:@"core" eventID:@"getd"
  64                 appPSN:[self iTunesPSN]];*/
  65     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get class of playlist %i", index]];
  66     return result;
  67 }
  68
  69 - (int)currentPlaylistIndex
  70 {
  71     int result;
  72     result = [[ITAppleEventCenter sharedCenter]
  73                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
  74                 fromObjectByKey:@"pPla" eventClass:@"core" eventID:@"getd"
  75                 appPSN:[self iTunesPSN]];
  76     return result;
  77 }
  78
  79 - (NSString *)songTitleAtIndex:(int)index
  80 {
  81     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"return name of track %i", index]];
  82     return result;
  83 }
  84
  85 - (int)currentSongIndex
  86 {
  87     int result;
  88     result = [[ITAppleEventCenter sharedCenter]
  89                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
  90                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
  91                 appPSN:[self iTunesPSN]];
  92     return result;
  93 }
  94
  95 - (NSString *)currentSongTitle
  96 {
  97     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pnam"
  98                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
  99                 appPSN:[self iTunesPSN]];
 100 }
 101
 102 - (NSString *)currentSongArtist
 103 {
 104     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pArt"
 105                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 106                 appPSN:[self iTunesPSN]];
 107 }
 108
 109 - (NSString *)currentSongAlbum
 110 {
 111     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pAlb"
 112                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 113                 appPSN:[self iTunesPSN]];
 114 }
 115
 116 - (NSString *)currentSongGenre
 117 {
 118     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pGen"
 119                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 120                 appPSN:[self iTunesPSN]];
 121 }
 122
 123 - (NSString *)currentSongLength
 124 {
 125     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pDur"
 126                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 127                 appPSN:[self iTunesPSN]];
 128 }
 129
 130 - (NSString *)currentSongRemaining
 131 {
 132     long duration = [[ITAppleEventCenter sharedCenter]
 133                         sendTwoTierAEWithRequestedKeyForNumber:@"pDur"
 134                         fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 135                         appPSN:[self iTunesPSN]];
 136     long current = [[ITAppleEventCenter sharedCenter]
 137                         sendAEWithRequestedKeyForNumber:@"pPos"
 138                         eventClass:@"core" eventID:@"getd"
 139                         appPSN:[self iTunesPSN]];
 140
 141     return [[NSNumber numberWithLong:duration - current] stringValue];
 142 }
 143
 144 - (NSArray *)eqPresets;
 145 {
 146     int i;
 147     int numPresets = [[self runScriptAndReturnResult:@"get number of EQ presets"] intValue];
 148     NSMutableArray *presets = [[NSMutableArray alloc] init];
 149
 150     for (i = 0; i < numPresets; i++) {
 151         [presets addObject:[self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of EQ preset %i", i]]];
 152     }
 153
 154     return [NSArray arrayWithArray:presets];
 155 }
 156
 157 - (BOOL)play
 158 {
 159     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Play"
 160             appPSN:[self iTunesPSN]];
 161     return YES;
 162 }
 163
 164 - (BOOL)pause
 165 {
 166     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Paus"
 167             appPSN:[self iTunesPSN]];
 168     return YES;
 169 }
 170
 171 - (BOOL)goToNextSong
 172 {
 173     NSLog(@"%@", [self classOfPlaylistAtIndex:3]);
 174     //[[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Next"
 175     //        appPSN:[self iTunesPSN]];
 176     return YES;
 177 }
 178
 179 - (BOOL)goToPreviousSong
 180 {
 181     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Prev"
 182             appPSN:[self iTunesPSN]];
 183     return YES;
 184 }
 185
 186 - (BOOL)switchToPlaylistAtIndex:(int)index
 187 {
 188     [self runScriptAndReturnResult:[NSString stringWithFormat:
 189         @"set current playlist to playlist %i", index]];
 190     return NO;
 191 }
 192
 193 - (BOOL)switchToSongAtIndex:(int)index
 194 {
 195     [self runScriptAndReturnResult:[NSString stringWithFormat:
 196         @"play track %i of current playlist", index]];
 197     return NO;
 198 }
 199
 200 - (BOOL)switchToEQAtIndex:(int)index
 201 {
 202     [self runScriptAndReturnResult:[NSString stringWithFormat:
 203         @"set current EQ preset to EQ preset %i", index]];
 204     return NO;
 205 }
 206
 207 - (ProcessSerialNumber)iTunesPSN
 208 {
 209     NSArray *apps = [[NSWorkspace sharedWorkspace] launchedApplications];
 210     ProcessSerialNumber number;
 211     int i;
 212
 213     number.highLongOfPSN = kNoProcess;
 214
 215     for (i = 0; i < [apps count]; i++)
 216     {
 217         NSDictionary *curApp = [apps objectAtIndex:i];
 218
 219         if ([[curApp objectForKey:@"NSApplicationName"] isEqualToString:@"iTunes"])
 220         {
 221             number.highLongOfPSN = [[curApp objectForKey:@"NSApplicationProcessSerialNumberHigh"] intValue];
 222             number.lowLongOfPSN = [[curApp objectForKey:@"NSApplicationProcessSerialNumberLow"] intValue];
 223         }
 224     }
 225     return number;
 226 }
 227
 228 - (NSString *)runScriptAndReturnResult:(NSString *)script
 229 {
 230     AEDesc scriptDesc, resultDesc;
 231     Size length;
 232     NSString *result;
 233     Ptr buffer;
 234
 235     script = [NSString stringWithFormat:@"tell application \"iTunes\"\n%@\nend tell", script];
 236
 237     AECreateDesc(typeChar, [script cString], [script cStringLength],
 238 &scriptDesc);
 239
 240     OSADoScript(asComponent, &scriptDesc, kOSANullScript, typeChar, kOSAModeCanInteract, &resultDesc);
 241
 242     length = AEGetDescDataSize(&resultDesc);
 243     buffer = malloc(length);
 244
 245     AEGetDescData(&resultDesc, buffer, length);
 246     AEDisposeDesc(&scriptDesc);
 247     AEDisposeDesc(&resultDesc);
 248     result = [NSString stringWithCString:buffer length:length];
 249     if ( (! [result isEqualToString:@""])      &&
 250          ([result characterAtIndex:0] == '\"') &&
 251          ([result characterAtIndex:[result length] - 1] == '\"') ) {
 252         result = [result substringWithRange:NSMakeRange(1, [result length] - 2)];
 253     }
 254     free(buffer);
 255     buffer = nil;
 256     return result;
 257 }
 258
 259 @end