TextDesignModifier

gistfile1.txt

struct TextDesignModifier: ViewModifier {
    typealias SizeDefinition = FontName.SizeDefinition
    
    var sizeDefinition: SizeDefinition
    var fontName: FontName?
    
    /// This is here to force a non-accessible font if needed (i.e. in the Font picker)
    var makeNameAccessibilitySafe: Bool
    
    @AppStorage(\.fontName, storeType: .shared) var currentFont

    init(sizeDefinition: SizeDefinition, fontName: FontName? = nil, makeNameAccessibilitySafe: Bool = true) {
        self.sizeDefinition = sizeDefinition
        self.fontName = fontName
        self.makeNameAccessibilitySafe = makeNameAccessibilitySafe
    }
    
    func body(content: Content) -> some View {
        let effectiveFontName: FontName
        
        if let fontName, fontName.isAccessibilityFont || makeNameAccessibilitySafe == false ||  currentFont.isAccessibilityFont == false {
            effectiveFontName = fontName
        } else {
            effectiveFontName = currentFont
        }
        
        return content
            .font(effectiveFontName.generateFont(sizeDefinition: sizeDefinition))
    }
}