NSLayoutManager is responsible for managing how text is laid out. NSLayoutManager objects manage a set of NSTextContainer objects, and supervise how text is laid out in these containers. Additionally, NSLayoutManager is responsible for mapping Unicode character codes into glyphs that will be displayed in an NSTextView object. In terms of the Model-View-Controller design pattern, NSTextStorage is the model, NSTextView the view, and NSLayoutManager and NSTextContainer are controllers between the data layer and the view layer.

@interface NSLayoutManager : NSObject <NSCoding>
// Initializers
- (id)init;
// Accessor Methods
- (void)setDelegate:(id)delegate;
- (id)delegate;
- (void)setDefaultAttachmentScaling:(NSImageScaling)scaling;
- (NSImageScaling)defaultAttachmentScaling;
- (void)setTemporaryAttributes:(NSDictionary *)attrs forCharacterRange:(NSRange)charRange;
- (void)setAttachmentSize:(NSSize)attachmentSize forGlyphRange:(NSRange)glyphRange;
- (void)setNotShownAttribute:(BOOL)flag forGlyphAtIndex:(unsigned)glyphIndex;
- (void)setTypesetter:(NSTypesetter *)typesetter;
- (NSTypesetter *)typesetter;
- (void)setLocation:(NSPoint)location forStartOfGlyphRange:(NSRange)glyphRange;
- (void)setCharacterIndex:(unsigned)charIndex forGlyphAtIndex:(unsigned)glyphIndex;
- (void)setBackgroundLayoutEnabled:(BOOL)flag;
- (BOOL)backgroundLayoutEnabled;
- (void)setExtraLineFragmentRect:(NSRect)fragmentRect usedRect:(NSRect)usedRect textContainer:(NSTextContainer *)container;
- (NSRect)extraLineFragmentRect;
- (void)setLineFragmentRect:(NSRect)fragmentRect forGlyphRange:(NSRange)glyphRange usedRect:(NSRect)usedRect;
- (void)setHyphenationFactor:(float)factor;
- (float)hyphenationFactor;
- (void)setUsesScreenFonts:(BOOL)flag;
- (BOOL)usesScreenFonts;
- (void)setIntAttribute:(int)attributeTag value:(int)val
forGlyphAtIndex:(unsigned)glyphIndex;
- (void)setTypesetterBehavior:(NSTypesetterBehavior)theBehavior;
- (NSTypesetterBehavior)typesetterBehavior;
- (void)setTextStorage:(NSTextStorage *)textStorage;
- (NSTextStorage *)textStorage;
- (void)setShowsControlCharacters:(BOOL)flag;
- (BOOL)showsControlCharacters;
- (void)setDrawsOutsideLineFragment:(BOOL)flag forGlyphAtIndex:(unsigned)glyphIndex;
- (void)setShowsInvisibleCharacters:(BOOL)flag;
- (BOOL)showsInvisibleCharacters;
- (void)setTextContainer:(NSTextContainer *)container forGlyphRange:(NSRange)glyphRange;
// Instance Methods
- (void)addTemporaryAttributes:(NSDictionary *)attrs forCharacterRange:(NSRange)charRange;
- (void)addTextContainer:(NSTextContainer *)container;
- (NSSize)attachmentSizeForGlyphAtIndex:(unsigned)glyphIndex;
- (NSRect)boundingRectForGlyphRange:(NSRange)glyphRange inTextContainer:(NSTextContainer *)container;
- (unsigned)characterIndexForGlyphAtIndex:(unsigned)glyphIndex;
- (NSRange)characterRangeForGlyphRange:(NSRange)glyphRange actualGlyphRange:(NSRangePointer)actualGlyphRange;
- (float)defaultLineHeightForFont:(NSFont *)theFont;
- (void)deleteGlyphsInRange:(NSRange)glyphRange;
- (void)drawBackgroundForGlyphRange:(NSRange)glyphsToShow atPoint:(NSPoint)origin;
- (void)drawGlyphsForGlyphRange:(NSRange)glyphsToShow atPoint:(NSPoint)origin;
- (void)drawUnderlineForGlyphRange:(NSRange)glyphRange underlineType:(int)underlineVal baselineOffset:(float)baselineOffset lineFragmentRect:(NSRect)lineRect lineFragmentGlyphRange:(NSRange)lineGlyphRange containerOrigin:(NSPoint)containerOrigin;
- (BOOL)drawsOutsideLineFragmentForGlyphAtIndex:(unsigned)glyphIndex;
- (NSTextContainer *)extraLineFragmentTextContainer;
- (NSRect)extraLineFragmentUsedRect;
- (NSTextView *)firstTextView;
- (unsigned)firstUnlaidCharacterIndex;
- (unsigned)firstUnlaidGlyphIndex;
- (float)fractionOfDistanceThroughGlyphForPoint:(NSPoint)point inTextContainer:(NSTextContainer *)container;
- (void)getFirstUnlaidCharacterIndex:(unsigned *)charIndex glyphIndex:(unsigned *)glyphIndex;
- (unsigned)getGlyphs:(NSGlyph *)glyphArray range:(NSRange)glyphRange;
- (unsigned)getGlyphsInRange:(NSRange)glyphsRange glyphs:(NSGlyph *)glyphBuffer characterIndexes:(unsigned *)charIndexBuffer glyphInscriptions:(NSGlyphInscription *)inscribeBuffer elasticBits:(BOOL *)elasticBuffer;
- (unsigned)getGlyphsInRange:(NSRange)glyphsRange glyphs:(NSGlyph *)glyphBuffer characterIndexes:(unsigned *)charIndexBuffer glyphInscriptions:(NSGlyphInscription *)inscribeBuffer elasticBits:(BOOL *)elasticBuffer bidiLevels:(unsigned char *)bidiLevelBuffer;
- (NSGlyph)glyphAtIndex:(unsigned)glyphIndex;
- (NSGlyph)glyphAtIndex:(unsigned)glyphIndex isValidIndex:(BOOL *)isValidIndex;
- (unsigned)glyphIndexForPoint:(NSPoint)point inTextContainer:(NSTextContainer *)container;
- (unsigned)glyphIndexForPoint:(NSPoint)point inTextContainer:(NSTextContainer *)container fractionOfDistanceThroughGlyph:(float *)partialFraction;
- (NSRange)glyphRangeForBoundingRect:(NSRect)bounds inTextContainer:(NSTextContainer *)container;
- (NSRange)glyphRangeForBoundingRectWithoutAdditionalLayout:(NSRect)bounds inTextContainer:(NSTextContainer *)container;
- (NSRange)glyphRangeForCharacterRange:(NSRange)charRange actualCharacterRange:(NSRangePointer)actualCharRange;
- (NSRange)glyphRangeForTextContainer:(NSTextContainer *)container;
- (void)insertGlyph:(NSGlyph)glyph atGlyphIndex:(unsigned)glyphIndex characterIndex:(unsigned)charIndex;
- (void)insertTextContainer:(NSTextContainer *)container atIndex:(unsigned)index;
- (int)intAttribute:(int)attributeTag forGlyphAtIndex:(unsigned)glyphIndex;
- (void)invalidateDisplayForCharacterRange:(NSRange)charRange;
- (void)invalidateDisplayForGlyphRange:(NSRange)glyphRange;
- (void)invalidateGlyphsForCharacterRange:(NSRange)charRange changeInLength:(int)delta actualCharacterRange:(NSRangePointer)actualCharRange;
- (void)invalidateLayoutForCharacterRange:(NSRange)charRange isSoft:(BOOL)flag actualCharacterRange:(NSRangePointer)actualCharRange;
- (BOOL)isValidGlyphIndex:(unsigned)glyphIndex;
- (BOOL)layoutManagerOwnsFirstResponderInWindow:(NSWindow *)window;
- (NSRect)lineFragmentRectForGlyphAtIndex:(unsigned)glyphIndex effectiveRange:(NSRangePointer)effectiveGlyphRange;
- (NSRect)lineFragmentUsedRectForGlyphAtIndex:(unsigned)glyphIndex effectiveRange:(NSRangePointer)effectiveGlyphRange;
- (NSPoint)locationForGlyphAtIndex:(unsigned)glyphIndex;
- (BOOL)notShownAttributeForGlyphAtIndex:(unsigned)glyphIndex;
- (unsigned)numberOfGlyphs;
- (NSRange)rangeOfNominallySpacedGlyphsContainingIndex:(unsigned)glyphIndex;
- (NSRectArray)rectArrayForCharacterRange:(NSRange)charRange withinSelectedCharacterRange:(NSRange)selCharRange inTextContainer:(NSTextContainer *)container rectCount:(unsigned *)rectCount;
- (NSRectArray)rectArrayForGlyphRange:(NSRange)glyphRange withinSelectedGlyphRange:(NSRange)selGlyphRange inTextContainer:(NSTextContainer *)container rectCount:(unsigned *)rectCount;
- (void)removeTemporaryAttribute:(NSString *)name forCharacterRange:(NSRange)charRange;
- (void)removeTextContainerAtIndex:(unsigned)index;
- (void)replaceGlyphAtIndex:(unsigned)glyphIndex withGlyph:(NSGlyph)newGlyph;
- (void)replaceTextStorage:(NSTextStorage *)newTextStorage;
- (NSView *)rulerAccessoryViewForTextView:(NSTextView *)view paragraphStyle:(NSParagraphStyle *)style ruler:(NSRulerView *)ruler enabled:(BOOL)isEnabled;
- (NSArray *)rulerMarkersForTextView:(NSTextView *)view paragraphStyle:(NSParagraphStyle *)style ruler:(NSRulerView *)ruler;
- (void)showAttachmentCell:(NSCell *)cell inRect:(NSRect)rect characterIndex:(unsigned)attachmentIndex;
- (void)showPackedGlyphs:(char *)glyphs length:(unsigned)glyphLen glyphRange:(NSRange)glyphRange atPoint:(NSPoint)point font:(NSFont *)font color:(NSColor *)color printingAdjustment:(NSSize)printingAdjustment;
- (NSFont *)substituteFontForFont:(NSFont *)originalFont;
- (NSDictionary *)temporaryAttributesAtCharacterIndex:(unsigned)charIndex effectiveRange:(NSRangePointer)effectiveCharRange;
- (void)textContainerChangedGeometry:(NSTextContainer *)container;
- (void)textContainerChangedTextView:(NSTextContainer *)container;
- (NSTextContainer *)textContainerForGlyphAtIndex:(unsigned)glyphIndex effectiveRange:(NSRangePointer)effectiveGlyphRange;
- (NSArray *)textContainers;
- (void)textStorage:(NSTextStorage *)str edited:(unsigned)editedMask range:(NSRange)newCharRange changeInLength:(int)delta invalidatedRange:(NSRange)invalidatedCharRange;
- (NSTextView *)textViewForBeginningOfSelection;
- (void)underlineGlyphRange:(NSRange)glyphRange underlineType:(int)underlineVal lineFragmentRect:(NSRect)lineRect lineFragmentGlyphRange:(NSRange)lineGlyphRange containerOrigin:(NSPoint)containerOrigin;
- (NSRect)usedRectForTextContainer:(NSTextContainer *)container;
// Methods Implementing NSCoding
- (void)encodeWithCoder:(NSCoder *)aCoder;
- (id)initWithCoder:(NSCoder *)aDecoder;
// Methods Implemented by the Delegate
- (void)layoutManager:(NSLayoutManager *)layoutManager didCompleteLayoutForTextContainer:(NSTextContainer *)textContainer atEnd:(BOOL)layoutFinishedFlag;
- (void)layoutManagerDidInvalidateLayout:(NSLayoutManager *)sender;