669e0d7625
also refactored models into class that are the parents Signed-off-by: Matt Bruce <matt.bruce@verizon.com>
87 lines
3.5 KiB
Swift
87 lines
3.5 KiB
Swift
//
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// LabelAttributeFont.swift
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// VDS
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//
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// Created by Matt Bruce on 8/3/22.
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//
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import Foundation
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import UIKit
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public struct TypographicalStyleLabelAttribute: LabelAttributeModel {
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//--------------------------------------------------
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// MARK: - Equatable
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//--------------------------------------------------
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public func isEqual(_ equatable: TypographicalStyleLabelAttribute) -> Bool {
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return id == equatable.id
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&& range == equatable.range
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&& color == equatable.color
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&& style == equatable.style
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}
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//--------------------------------------------------
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// MARK: - Properties
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//--------------------------------------------------
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public var id = UUID()
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public var location: Int
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public var length: Int
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public var style: TypographicalStyle
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public var color: UIColor
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public var textPosition: TextPosition
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public var lineBreakMode: NSLineBreakMode
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//--------------------------------------------------
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// MARK: - Initializer
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//--------------------------------------------------
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public init(location: Int, length: Int, style: TypographicalStyle, color: UIColor = .black, textPosition: TextPosition = .left, lineBreakMode: NSLineBreakMode = .byWordWrapping) {
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self.location = location
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self.length = length
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self.style = style
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self.color = color
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self.textPosition = textPosition
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self.lineBreakMode = lineBreakMode
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}
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public func setAttribute(on attributedString: NSMutableAttributedString) {
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attributedString.removeAttribute(.font, range: range)
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attributedString.removeAttribute(.foregroundColor, range: range)
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attributedString.addAttribute(.font, value: style.font, range: range)
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attributedString.addAttribute(.foregroundColor, value: color, range: range)
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setStyleAttributes(attributedString)
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}
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private func setStyleAttributes(_ attributedString: NSMutableAttributedString) {
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//set letterSpacing
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if style.letterSpacing > 0.0 {
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attributedString.removeAttribute(.kern, range: range)
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attributedString.addAttribute(.kern, value: style.letterSpacing, range: range)
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}
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//set lineHeight
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if style.lineHeight > 0.0 {
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let lineHeight = style.lineHeight
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let adjustment = lineHeight > style.font.lineHeight ? 2.0 : 1.0
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let baselineOffset = (lineHeight - style.font.lineHeight) / 2.0 / adjustment
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let paragraph = NSMutableParagraphStyle().with {
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$0.maximumLineHeight = lineHeight
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$0.minimumLineHeight = lineHeight
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$0.alignment = textPosition.textAlignment
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$0.lineBreakMode = lineBreakMode
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}
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attributedString.removeAttribute(.baselineOffset, range: range)
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attributedString.removeAttribute(.paragraphStyle, range: range)
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attributedString.addAttribute(.baselineOffset, value: baselineOffset, range: range)
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attributedString.addAttribute(.paragraphStyle, value: paragraph, range: range)
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} else if textPosition != .left {
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let paragraph = NSMutableParagraphStyle().with {
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$0.alignment = textPosition.textAlignment
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$0.lineBreakMode = lineBreakMode
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}
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attributedString.removeAttribute(.paragraphStyle, range: range)
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attributedString.addAttribute(.paragraphStyle, value: paragraph, range: range)
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}
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}
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}
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