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. Written by iThink Software.";
  18 }
  19
  20 - (NSImage *)icon
  21 {
  22     return nil;
  23 }
  24
  25 - (BOOL)begin
  26 {
  27     iTunesPSN = [self iTunesPSN];
  28
  29     //We won't need this once we're pure AEs
  30     asComponent = OpenDefaultComponent(kOSAComponentType, kAppleScriptSubtype);
  31
  32     //Register for application termination in NSWorkspace
  33     [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:self selector:@selector(applicationLaunched:) name:NSWorkspaceDidLaunchApplicationNotification object:nil];
  34     [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver:self selector:@selector(applicationTerminated:) name:NSWorkspaceDidTerminateApplicationNotification object:nil];
  35
  36     return YES;
  37 }
  38
  39 - (BOOL)halt
  40 {
  41     iTunesPSN.highLongOfPSN = kNoProcess;
  42
  43     //We won't need this once we're pure AEs
  44     CloseComponent(asComponent);
  45
  46     //Unregister for application termination in NSWorkspace
  47     [[[NSWorkspace sharedWorkspace] notificationCenter] removeObserver:self];
  48
  49     return YES;
  50 }
  51
  52 - (BOOL)isAppRunning
  53 {
  54     NSArray *apps = [[NSWorkspace sharedWorkspace] launchedApplications];
  55     int i,count = [apps count];
  56
  57     for (i = 0; i < count; i++) {
  58         if ([[[apps objectAtIndex:i] objectForKey:@"NSApplicationName"]
  59                 isEqualToString:@"iTunes"]) {
  60             return YES;
  61         }
  62     }
  63     return NO;
  64 }
  65
  66 - (PlayerState)playerState
  67 {
  68     NSString *result = [self runScriptAndReturnResult:@"get player state"];
  69
  70     if ([result isEqualToString:@"playing"]) {
  71         return playing;
  72     } else if ([result isEqualToString:@"paused"]) {
  73         return paused;
  74     } else if ([result isEqualToString:@"stopped"]) {
  75         return stopped;
  76     } else if ([result isEqualToString:@"rewinding"]) {
  77         return rewinding;
  78     } else if ([result isEqualToString:@"fast forwarding"]) {
  79         return forwarding;
  80     }
  81
  82     return stopped;
  83 }
  84
  85 - (NSArray *)playlists
  86 {
  87     int i;
  88     int numPresets = [[self runScriptAndReturnResult:@"get number of playlists"] intValue];
  89     NSMutableArray *presets = [[NSMutableArray alloc] init];
  90     for (i = 1; i <= numPresets; i++) {
  91         [presets addObject:[self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of playlist %i", i]]];
  92     }
  93
  94     return [presets autorelease];
  95 }
  96
  97 - (int)numberOfSongsInPlaylistAtIndex:(int)index
  98 {
  99     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get number of tracks in playlist %i", index]];
 100     return [result intValue];
 101 }
 102
 103 - (NSString *)classOfPlaylistAtIndex:(int)index
 104 {
 105     //Not working yet. It returns the 4 character code instead of a name.
 106     /*NSString *result;
 107     result = [[ITAppleEventCenter sharedCenter]
 108                 sendTwoTierAEWithRequestedKey:@"pcls"
 109                 fromObjectByKey:@"pPla" eventClass:@"core" eventID:@"getd"
 110                 appPSN:[self iTunesPSN]];*/
 111     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get class of playlist %i", index]];
 112     return result;
 113 }
 114
 115 - (int)currentPlaylistIndex
 116 {
 117     int result;
 118     result = [[ITAppleEventCenter sharedCenter]
 119                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
 120                 fromObjectByKey:@"pPla" eventClass:@"core" eventID:@"getd"
 121                 appPSN:[self iTunesPSN]];
 122     return result;
 123 }
 124
 125 - (NSString *)songTitleAtIndex:(int)index
 126 {
 127     NSString *result = [self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of track %i of current playlist", index]];
 128     return result;
 129 }
 130
 131 - (int)currentSongIndex
 132 {
 133     int result;
 134     result = [[ITAppleEventCenter sharedCenter]
 135                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
 136                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 137                 appPSN:[self iTunesPSN]];
 138     return result;
 139 }
 140
 141 - (NSString *)currentSongTitle
 142 {
 143     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pnam"
 144                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 145                 appPSN:[self iTunesPSN]];
 146 }
 147
 148 - (NSString *)currentSongArtist
 149 {
 150     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pArt"
 151                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 152                 appPSN:[self iTunesPSN]];
 153 }
 154
 155 - (NSString *)currentSongAlbum
 156 {
 157     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pAlb"
 158                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 159                 appPSN:[self iTunesPSN]];
 160 }
 161
 162 - (NSString *)currentSongGenre
 163 {
 164     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pGen"
 165                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 166                 appPSN:[self iTunesPSN]];
 167 }
 168
 169 - (NSString *)currentSongLength
 170 {
 171     return [[ITAppleEventCenter sharedCenter] sendTwoTierAEWithRequestedKey:@"pTim"
 172                 fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 173                 appPSN:[self iTunesPSN]];
 174 }
 175
 176 - (NSString *)currentSongRemaining
 177 {
 178     long duration = [[ITAppleEventCenter sharedCenter]
 179                         sendTwoTierAEWithRequestedKeyForNumber:@"pDur"
 180                         fromObjectByKey:@"pTrk" eventClass:@"core" eventID:@"getd"
 181                         appPSN:[self iTunesPSN]];
 182     long current = [[ITAppleEventCenter sharedCenter]
 183                         sendAEWithRequestedKeyForNumber:@"pPos"
 184                         eventClass:@"core" eventID:@"getd"
 185                         appPSN:[self iTunesPSN]];
 186
 187     return [[NSNumber numberWithLong:duration - current] stringValue];
 188 }
 189
 190 - (NSArray *)eqPresets;
 191 {
 192     int i;
 193     int numPresets = [[self runScriptAndReturnResult:@"get number of EQ presets"] intValue];
 194     NSMutableArray *presets = [[NSMutableArray alloc] init];
 195
 196     for (i = 1; i <= numPresets; i++) {
 197         [presets addObject:[self runScriptAndReturnResult:[NSString stringWithFormat:@"get name of EQ preset %i", i]]];
 198     }
 199
 200     return [presets autorelease];
 201 }
 202
 203 - (int)currentEQPresetIndex
 204 {
 205     int result;
 206     result = [[ITAppleEventCenter sharedCenter]
 207                 sendTwoTierAEWithRequestedKeyForNumber:@"pidx"
 208                 fromObjectByKey:@"pEQP" eventClass:@"core" eventID:@"getd"
 209                 appPSN:[self iTunesPSN]];
 210     return result;
 211 }
 212
 213 - (BOOL)play
 214 {
 215     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Play"
 216             appPSN:[self iTunesPSN]];
 217     return YES;
 218 }
 219
 220 - (BOOL)pause
 221 {
 222     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Paus"
 223             appPSN:[self iTunesPSN]];
 224     return YES;
 225 }
 226
 227 - (BOOL)goToNextSong
 228 {
 229     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Next"
 230             appPSN:[self iTunesPSN]];
 231     return YES;
 232 }
 233
 234 - (BOOL)goToPreviousSong
 235 {
 236     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Prev"
 237             appPSN:[self iTunesPSN]];
 238     return YES;
 239 }
 240
 241 - (BOOL)fastForward
 242 {
 243     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Fast"
 244             appPSN:[self iTunesPSN]];
 245     return YES;
 246 }
 247
 248 - (BOOL)rewind
 249 {
 250     [[ITAppleEventCenter sharedCenter] sendAEWithEventClass:@"hook" eventID:@"Rwnd"
 251             appPSN:[self iTunesPSN]];
 252     return YES;
 253 }
 254
 255
 256 - (BOOL)switchToPlaylistAtIndex:(int)index
 257 {
 258     [self runScriptAndReturnResult:[NSString stringWithFormat:
 259         @"play playlist %i", index]];
 260     return NO;
 261 }
 262
 263 - (BOOL)switchToSongAtIndex:(int)index
 264 {
 265     [self runScriptAndReturnResult:[NSString stringWithFormat:
 266         @"play track %i of current playlist", index]];
 267     return NO;
 268 }
 269
 270 - (BOOL)switchToEQAtIndex:(int)index
 271 {
 272     [self runScriptAndReturnResult:[NSString stringWithFormat:
 273         @"set current EQ preset to EQ preset %i", index]];
 274     [self runScriptAndReturnResult:@"set EQ enabled to 1"];
 275     return NO;
 276 }
 277
 278 - (ProcessSerialNumber)iTunesPSN
 279 {
 280     NSArray *apps = [[NSWorkspace sharedWorkspace] launchedApplications];
 281     ProcessSerialNumber number;
 282     int i;
 283
 284     number.highLongOfPSN = kNoProcess;
 285
 286     for (i = 0; i < [apps count]; i++)
 287     {
 288         NSDictionary *curApp = [apps objectAtIndex:i];
 289
 290         if ([[curApp objectForKey:@"NSApplicationName"] isEqualToString:@"iTunes"])
 291         {
 292             number.highLongOfPSN = [[curApp objectForKey:@"NSApplicationProcessSerialNumberHigh"] intValue];
 293             number.lowLongOfPSN = [[curApp objectForKey:@"NSApplicationProcessSerialNumberLow"] intValue];
 294         }
 295     }
 296     return number;
 297 }
 298
 299 - (void)applicationLaunched:(NSNotification *)note
 300 {
 301     NSDictionary *info = [note userInfo];
 302
 303     if ([[info objectForKey:@"NSApplicationName"] isEqualToString:@"iTunes"]) {
 304         iTunesPSN.highLongOfPSN = [[info objectForKey:@"NSApplicationProcessSerialNumberHigh"] longValue];
 305         iTunesPSN.lowLongOfPSN = [[info objectForKey:@"NSApplicationProcessSerialNumberLow"] longValue];
 306
 307         [[NSNotificationCenter defaultCenter] postNotificationName:@"ITMTRemoteAppDidLaunchNotification" object:nil];
 308     }
 309 }
 310
 311 - (void)applicationTerminated:(NSNotification *)note
 312 {
 313     NSDictionary *info = [note userInfo];
 314
 315     if ([[info objectForKey:@"NSApplicationName"] isEqualToString:@"iTunes"]) {
 316         iTunesPSN.highLongOfPSN = kNoProcess;
 317         [[NSNotificationCenter defaultCenter] postNotificationName:@"ITMTRemoteAppDidTerminateNotification" object:nil];
 318     }
 319 }
 320
 321 //This is just temporary
 322 - (NSString *)runScriptAndReturnResult:(NSString *)script
 323 {
 324     AEDesc scriptDesc, resultDesc;
 325     Size length;
 326     NSString *result;
 327     Ptr buffer;
 328
 329     script = [NSString stringWithFormat:@"tell application \"iTunes\"\n%@\nend tell", script];
 330
 331     AECreateDesc(typeChar, [script cString], [script cStringLength],
 332 &scriptDesc);
 333
 334     OSADoScript(asComponent, &scriptDesc, kOSANullScript, typeChar, kOSAModeCanInteract, &resultDesc);
 335
 336     length = AEGetDescDataSize(&resultDesc);
 337     buffer = malloc(length);
 338
 339     AEGetDescData(&resultDesc, buffer, length);
 340     AEDisposeDesc(&scriptDesc);
 341     AEDisposeDesc(&resultDesc);
 342     result = [NSString stringWithCString:buffer length:length];
 343     if ( (! [result isEqualToString:@""])      &&
 344          ([result characterAtIndex:0] == '\"') &&
 345          ([result characterAtIndex:[result length] - 1] == '\"') ) {
 346         result = [result substringWithRange:NSMakeRange(1, [result length] - 2)];
 347     }
 348     free(buffer);
 349     buffer = nil;
 350     return result;
 351 }
 352
 353 @end