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# CTTypesetter

A typesetter which performs line layout.

```
class CTTypesetter
```

## Overview

Line layout includes word wrapping, hyphenation, and line breaking in either vertical or horizontal rectangles. A typesetter object takes as input an attributed string and produces a line of typeset glyphs (composed into glyph runs) in a [`CTLine`](/documentation/CoreText/CTLine) object. The typesetter performs character-to-glyph encoding, glyph ordering, and positional operations, such as kerning, tracking, and baseline adjustments. If multiline layout is needed, it is performed by a [`CTFramesetter`](/documentation/CoreText/CTFramesetter) object, which calls into the typesetter to generate the typeset lines to fill the frame.

A [`CTFramesetter`](/documentation/CoreText/CTFramesetter) encapsulates a typesetter and provides a reference to it as a convenience, but a caller may also choose to create a freestanding typesetter.

## Topics

### Creating a Typesetter

[`CTTypesetterCreateWithAttributedString(_:)`](/documentation/CoreText/CTTypesetterCreateWithAttributedString(_:))

Creates an immutable typesetter object using an attributed string.

[`CTTypesetterCreateWithAttributedStringAndOptions(_:_:)`](/documentation/CoreText/CTTypesetterCreateWithAttributedStringAndOptions(_:_:))

Creates an immutable typesetter object using an attributed string and a dictionary of options.

### Creating Lines

[`CTTypesetterCreateLine(_:_:)`](/documentation/CoreText/CTTypesetterCreateLine(_:_:))

Creates an immutable line from the typesetter.

[`CTTypesetterCreateLineWithOffset(_:_:_:)`](/documentation/CoreText/CTTypesetterCreateLineWithOffset(_:_:_:))

Creates an immutable line from the typesetter at a specified line offset.

### Breaking Lines

[`CTTypesetterSuggestLineBreak(_:_:_:)`](/documentation/CoreText/CTTypesetterSuggestLineBreak(_:_:_:))

Suggests a contextual line breakpoint based on the width provided.

[`CTTypesetterSuggestLineBreakWithOffset(_:_:_:_:)`](/documentation/CoreText/CTTypesetterSuggestLineBreakWithOffset(_:_:_:_:))

Suggests a contextual line breakpoint based on the width provided and the specified offset.

[`CTTypesetterSuggestClusterBreak(_:_:_:)`](/documentation/CoreText/CTTypesetterSuggestClusterBreak(_:_:_:))

Suggests a cluster line breakpoint based on the width provided.

[`CTTypesetterSuggestClusterBreakWithOffset(_:_:_:_:)`](/documentation/CoreText/CTTypesetterSuggestClusterBreakWithOffset(_:_:_:_:))

Suggests a cluster line breakpoint based on the specified width and line offset.

### Getting the Type Identifier

[`CTTypesetterGetTypeID()`](/documentation/CoreText/CTTypesetterGetTypeID())

Returns the Core Foundation type identifier of the typesetter object.

### Constants

[Typesetter Options](/documentation/CoreText/typesetter-options)

Control aspects of the typesetter’s text processing.


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