Class

NSGlyphInfo

A glyph attribute in an attributed string.

Overview

Glyphs are the graphic representations of characters, stored in a font, that the text system draws on a display or printed page. Before text can be laid out, the layout manager (NSLayoutManager) generates a stream of glyphs to be laid out, using character and font information specified by the attributed string and contained in the font file. NSGlyphInfo represents a glyph attribute value (glyphInfo) in an attributed string (NSAttributedString) and provides a means to override the standard glyph generation process and substitute a specified glyph over the attribute’s range.

Glyph attributes are integer values that the layout manager uses to denote special handling for particular glyphs during rendering. NSGlyphInfo enables you to override a font’s built-in mapping from a Unicode character code to a corresponding glyph ID. Overriding the mapping allows you to specify a variant glyph for a given character if the font contains multiple variations for that character or to specify a glyph that doesn’t have a standard mapping (such as some ligature glyphs).

Topics

Creating an NSGlyphInfo Object

init?(characterIdentifier: Int, collection: NSCharacterCollection, baseString: String)

Instantiates and returns an NSGlyphInfo object using a character identifier and a character collection.

Deprecated
init?(glyph: NSGlyph, for: NSFont, baseString: String)

Instantiates and returns an NSGlyphInfo object using a glyph index and a specified font.

Deprecated
init?(glyphName: String, for: NSFont, baseString: String)

Instantiates and returns an NSGlyphInfo object using a glyph name and a specified font.

Deprecated

Getting Information About an NSGlyphInfo Object

var characterIdentifier: Int

The receiver’s character identifier (CID).

Deprecated
var characterCollection: NSCharacterCollection

an NSCharacterCollection value specifying the glyph–to–character identifier mapping of the receiver.

Deprecated
var glyphName: String?

The receiver’s glyph name.

Deprecated

Constants

enum NSCharacterCollection

Values returned by characterCollection to specify the mapping of character identifiers to glyphs.

Relationships

Inherits From

See Also

Glyphs

typealias NSGlyph

The type used to specify glyphs.

protocol NSGlyphStorage

A set of methods that a glyph storage object must implement to interact properly with NSGlyphGenerator.

class NSGlyphGenerator

An object that performs the initial, nominal glyph generation phase in the layout process.

Glyph Attributes

Attributes that are used only inside the glyph generation machinery, but must also be shared between components.

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