This class is a key component of the subsystem used to receive and process keystrokes, and direct the associated characters to the active text view to be added to the displayed text. The other two key classes of Cocoa's text input system are NSInputManager and NSTextView. This class implements the interfaces declared in the NSInputServiceProvider and NSInputServerMouseTracker protocols. These two protocols declare the bulk of the functionality of NSInputServer. See the descriptions for these two protocols in Chapter 3 for more information.

@interface NSInputServer : NSObject <NSInputServerMouseTracker, NSInputServiceProvider>
// Instance Methods
- (id) initWithDelegate:(id)aDelegate name:(NSString *)name;
// Methods Implementing NSInputServerMouseTracker
- (BOOL)mouseDownOnCharacterIndex:(unsigned)theIndex atCoordinate:(NSPoint)thePoint withModifier:(unsigned int)theFlags client:(id)sender;
- (BOOL)mouseDraggedOnCharacterIndex:(unsigned)theIndex atCoordinate:(NSPoint)thePoint withModifier:(unsigned int)theFlags client:(id)sender;
- (void)mouseUpOnCharacterIndex:(unsigned)theIndex atCoordinate:(NSPoint)thePoint withModifier:(unsigned int)theFlags client:(id)sender;
// Methods Implementing NSInputServiceProvider
- (void)insertText:(id)aString client:(id)sender;
- (void)doCommandBySelector:(SEL)aSelector client:(id)sender;
- (void)markedTextAbandoned:(id)sender;
- (void)markedTextSelectionChanged:(NSRange)newSel client:(id)sender;
- (void)terminate:(id)sender;
- (BOOL)canBeDisabled;
- (BOOL)wantsToInterpretAllKeystrokes;
- (BOOL)wantsToHandleMouseEvents;
- (BOOL)wantsToDelayTextChangeNotifications;
- (void)inputClientBecomeActive:(id)sender;
- (void)inputClientResignActive:(id)sender;
- (void)inputClientEnabled:(id)sender;
- (void)inputClientDisabled:(id)sender;
- (void)activeConversationWillChange:(id)sender fromOldConversation:(long)oldConversation;
- (void)activeConversationChanged:(id)sender toNewConversation:(long)newConversation;