240 lines
9.5 KiB
Swift
240 lines
9.5 KiB
Swift
//
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// Container.swift
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// MVMCoreUI
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//
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// Created by Scott Pfeil on 12/11/19.
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// Copyright © 2019 Verizon Wireless. All rights reserved.
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//
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import UIKit
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public protocol ContainerModelProtocol {
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var horizontalAlignment: UIStackView.Alignment? { get set }
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var verticalAlignment: UIStackView.Alignment? { get set }
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var useHorizontalMargins: Bool? { get set }
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var useVerticalMargins: Bool? { get set }
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}
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public class ContainerHelper: NSObject {
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var leftConstraint: NSLayoutConstraint?
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var topConstraint: NSLayoutConstraint?
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var bottomConstraint: NSLayoutConstraint?
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var rightConstraint: NSLayoutConstraint?
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var alignCenterHorizontalConstraint: NSLayoutConstraint?
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var alignCenterLeftConstraint: NSLayoutConstraint?
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var alignCenterRightConstraint: NSLayoutConstraint?
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var alignCenterVerticalConstraint: NSLayoutConstraint?
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var alignCenterTopConstraint: NSLayoutConstraint?
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var alignCenterBottomConstraint: NSLayoutConstraint?
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var leftLowConstraint: NSLayoutConstraint?
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var topLowConstraint: NSLayoutConstraint?
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var bottomLowConstraint: NSLayoutConstraint?
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var rightLowConstraint: NSLayoutConstraint?
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func constrainView(_ view: UIView) {
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guard let margins = view.superview?.layoutMarginsGuide else { return }
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leftConstraint = view.leftAnchor.constraint(equalTo: margins.leftAnchor)
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leftConstraint?.isActive = true
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topConstraint = view.topAnchor.constraint(equalTo: margins.topAnchor)
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topConstraint?.isActive = true
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rightConstraint = margins.rightAnchor.constraint(equalTo: view.rightAnchor)
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rightConstraint?.isActive = true
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bottomConstraint = margins.bottomAnchor.constraint(equalTo: view.bottomAnchor)
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bottomConstraint?.isActive = true
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alignCenterHorizontalConstraint = view.centerXAnchor.constraint(equalTo: margins.centerXAnchor)
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alignCenterLeftConstraint = view.leftAnchor.constraint(greaterThanOrEqualTo: margins.leftAnchor)
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alignCenterRightConstraint = margins.rightAnchor.constraint(greaterThanOrEqualTo: view.rightAnchor)
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alignCenterVerticalConstraint = view.centerYAnchor.constraint(equalTo: margins.centerYAnchor)
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alignCenterTopConstraint = view.topAnchor.constraint(greaterThanOrEqualTo: margins.topAnchor)
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alignCenterBottomConstraint = margins.bottomAnchor.constraint(greaterThanOrEqualTo: view.bottomAnchor)
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leftLowConstraint = view.leftAnchor.constraint(equalTo: margins.leftAnchor)
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leftLowConstraint?.priority = UILayoutPriority(rawValue: 200)
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leftLowConstraint?.isActive = true
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topLowConstraint = view.topAnchor.constraint(equalTo: margins.topAnchor)
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topLowConstraint?.priority = UILayoutPriority(rawValue: 200)
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topLowConstraint?.isActive = true
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rightLowConstraint = margins.rightAnchor.constraint(equalTo: view.rightAnchor)
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rightLowConstraint?.priority = UILayoutPriority(rawValue: 200)
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rightLowConstraint?.isActive = true
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bottomLowConstraint = margins.bottomAnchor.constraint(equalTo: view.bottomAnchor)
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bottomLowConstraint?.priority = UILayoutPriority(rawValue: 200)
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bottomLowConstraint?.isActive = true
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setAccessibility(view)
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}
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func setAccessibility(_ view: UIView) {
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guard let superView = view.superview else { return }
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superView.isAccessibilityElement = false
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if let elements = view.accessibilityElements {
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superView.accessibilityElements = elements
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} else {
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superView.accessibilityElements = [view]
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}
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}
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func alignHorizontal(_ alignment: UIStackView.Alignment) {
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switch alignment {
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case .center:
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alignCenterHorizontalConstraint?.isActive = true
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alignCenterLeftConstraint?.isActive = true
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alignCenterRightConstraint?.isActive = true
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leftConstraint?.isActive = false
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rightConstraint?.isActive = false
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case .leading:
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alignCenterHorizontalConstraint?.isActive = false
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alignCenterLeftConstraint?.isActive = false
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alignCenterRightConstraint?.isActive = true
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leftConstraint?.isActive = true
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rightConstraint?.isActive = false
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case .trailing:
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alignCenterHorizontalConstraint?.isActive = false
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alignCenterLeftConstraint?.isActive = true
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alignCenterRightConstraint?.isActive = false
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leftConstraint?.isActive = false
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rightConstraint?.isActive = true
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case .fill:
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alignCenterHorizontalConstraint?.isActive = false
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alignCenterLeftConstraint?.isActive = false
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alignCenterRightConstraint?.isActive = false
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leftConstraint?.isActive = true
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rightConstraint?.isActive = true
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default: break
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}
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}
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func alignVertical(_ alignment: UIStackView.Alignment) {
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switch alignment {
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case .center:
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alignCenterVerticalConstraint?.isActive = true
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alignCenterTopConstraint?.isActive = true
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alignCenterBottomConstraint?.isActive = true
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topConstraint?.isActive = false
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bottomConstraint?.isActive = false
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case .leading:
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alignCenterVerticalConstraint?.isActive = false
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alignCenterTopConstraint?.isActive = false
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alignCenterBottomConstraint?.isActive = true
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topConstraint?.isActive = true
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bottomConstraint?.isActive = false
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case .trailing:
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alignCenterVerticalConstraint?.isActive = false
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alignCenterTopConstraint?.isActive = true
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alignCenterBottomConstraint?.isActive = false
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topConstraint?.isActive = false
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bottomConstraint?.isActive = true
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case .fill:
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alignCenterVerticalConstraint?.isActive = false
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alignCenterTopConstraint?.isActive = false
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alignCenterBottomConstraint?.isActive = false
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topConstraint?.isActive = true
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bottomConstraint?.isActive = true
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default: break
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}
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}
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func set(with model: ContainerModelProtocol) {
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if let horizontalAlignment = model.horizontalAlignment {
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alignHorizontal(horizontalAlignment)
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}
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if let verticalAlignment = model.verticalAlignment {
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alignVertical(verticalAlignment)
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}
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}
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static func getAlignment(for string: String) -> UIStackView.Alignment? {
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switch string {
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case "leading":
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return .leading
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case "trailing":
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return .trailing
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case "center":
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return .center
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case "fill":
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return .fill
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default:
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return nil
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}
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}
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func set(with JSON: [AnyHashable: Any]?, for contained: UIView) {
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if let horizontalAlignmentString = JSON?.optionalStringForKey("horizontalAlignment"), let alignment = ContainerHelper.getAlignment(for: horizontalAlignmentString) ?? (contained as? MVMCoreUIViewConstrainingProtocol)?.horizontalAlignment?() {
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alignHorizontal(alignment)
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} else if let alignment = (contained as? MVMCoreUIViewConstrainingProtocol)?.horizontalAlignment?() {
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alignHorizontal(alignment)
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}
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if let verticalAlignmentString = JSON?.optionalStringForKey("verticalAlignment"), let alignment = ContainerHelper.getAlignment(for: verticalAlignmentString) ?? (contained as? MVMCoreUIViewConstrainingProtocol)?.verticalAlignment?() {
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alignVertical(alignment)
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} else if let alignment = (contained as? MVMCoreUIViewConstrainingProtocol)?.verticalAlignment?() {
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alignVertical(alignment)
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}
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}
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}
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open class Container: View {
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var containerModel: ContainerModelProtocol?
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var view: UIView?
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let containerHelper = ContainerHelper()
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var topMarginPadding: CGFloat = 0
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var bottomMarginPadding: CGFloat = 0
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}
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// MARK: - MVMCoreViewProtocol
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public extension Container {
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override func updateView(_ size: CGFloat) {
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super.updateView(size)
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(view as? MVMCoreViewProtocol)?.updateView(size)
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MFStyler.setMarginsFor(self, size: size, defaultHorizontal: containerModel?.useHorizontalMargins ?? true, top: containerModel?.useHorizontalMargins ?? true ? topMarginPadding : 0, bottom: containerModel?.useHorizontalMargins ?? true ? bottomMarginPadding : 0)
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}
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/// Will be called only once.
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override func setupView() {
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super.setupView()
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backgroundColor = .clear
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}
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func addAndContain(_ view: UIView) {
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view.translatesAutoresizingMaskIntoConstraints = false
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addSubview(view)
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containerHelper.constrainView(view)
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self.view = view
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}
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convenience init(andContain view: UIView) {
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self.init()
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addAndContain(view)
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}
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}
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// MARK: - MVMCoreUIMoleculeViewProtocol
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public extension Container {
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override func setWithJSON(_ json: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?, additionalData: [AnyHashable : Any]?) {
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super.setWithJSON(json, delegateObject: delegateObject, additionalData: additionalData)
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guard let view = view else { return }
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containerHelper.set(with: json, for: view)
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}
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override func reset() {
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super.reset()
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(view as? MVMCoreUIMoleculeViewProtocol)?.reset?()
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}
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func setAsMolecule() {
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(view as? MVMCoreUIMoleculeViewProtocol)?.setAsMolecule?()
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}
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}
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