func layoutManager()

in Sources/TwitterTextEditor/LayoutManager.swift [323:339]


    func layoutManager(_ layoutManager: NSLayoutManager,
                       shouldUse action: NSLayoutManager.ControlCharacterAction,
                       forControlCharacterAt charIndex: Int) -> NSLayoutManager.ControlCharacterAction
    {
        guard let textStorage = layoutManager.textStorage else {
            return action
        }

        let attributes = textStorage.attributes(at: charIndex, effectiveRange: nil)
        guard attributes[.suffixedAttachment] is TextAttributes.SuffixedAttachment else {
            return action
        }

        // `.whitespace` may not be set always by `NSTypesetter`.
        // This is only for control glyphs inserted by `layoutManager(_:shouldGenerateGlyphs:properties:characterIndexes:font:forGlyphRange:)`.
        return .whitespace
    }