Mac 多媒體快捷鍵：BeardedSpice

Bearded Spice 允許你使用 Mac 鍵盤上的多媒體快捷鍵控制基于 Web 的多媒體播放器（比如 SoundCloud，油Tube 等等）和一些原生應用。

BeardedSpice 特性：智能模式，自動更新，快捷鍵等等。

多媒體策略：

@interface MediaStrategy : NSObject
/**
Returns name of that media stratery. 
*/
-(NSString *) displayName; // Required override in subclass.
/**
Checks tab that it is accepted this strategy.
*/
-(BOOL) accepts:(TabAdapter *)tab; // Required override in subclass.
/**
Checks tab that it is in the playback state.
*/
- (BOOL)isPlaying:(TabAdapter *)tab;
/**
Returns track information object from tab.
*/
- (Track *)trackInfo:(TabAdapter *)tab;
/**
Returns javascript code of the play/pause toggle.
*/
-(NSString *) toggle; // Required override in subclass.
/**
Returns javascript code of the previous track action.
*/
-(NSString *) previous;
/**
Returns javascript code of the next track action.
*/
-(NSString *) next;
/**
Returns javascript code of the pausing action.
Used mainly for pausing before switching active tabs.
*/
-(NSString *) pause; // Required override in subclass.
/**
Returns javascript code of the "favorite" toggle.
*/
-(NSString *) favorite;
/**
Helper method for obtaining album artwork from url string
*/
- (NSImage *)imageByUrlString:(NSString *)urlString;
@end

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