This protocol declares an interface for classes that draw text attachments and handle mouse events within a text attachment. NSCell implements all of the methods of this protocol, less three: cellBaselineOffset, setAttachment:, and attachment. NSTextAttachmentCell extends NSCell's interface by implementing these three methods.

@protocol NSTextAttachmentCell
// Instance Methods
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView;
- (BOOL)wantsToTrackMouse;
- (void)highlight:(BOOL)flag withFrame:(NSRect)cellFrame inView:(NSView *)controlView;
- (BOOL)trackMouse:(NSEvent *)theEvent inRect:(NSRect)cellFrame ofView:(NSView *)controlView untilMouseUp:(BOOL)flag;
- (NSSize)cellSize;
- (NSPoint)cellBaselineOffset;
- (void)setAttachment:(NSTextAttachment *)anObject;
- (NSTextAttachment *)attachment;
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView characterIndex:(unsigned)charIndex;
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView characterIndex:(unsigned)charIndex layoutManager:(NSLayoutManager *)layoutManager;
- (BOOL)wantsToTrackMouseForEvent:(NSEvent *)theEvent inRect:(NSRect)cellFrame ofView:(NSView *)controlView atCharacterIndex:(unsigned)charIndex;
- (BOOL)trackMouse:(NSEvent *)theEvent inRect:(NSRect)cellFrame ofView:(NSView *)controlView atCharacterIndex:(unsigned)charIndex untilMouseUp:(BOOL)flag;
- (NSRect)cellFrameForTextContainer:(NSTextContainer *)textContainer proposedLineFragment:(NSRect)lineFrag glyphPosition:(NSPoint)position characterIndex:(unsigned)charIndex;
@end