240 lines
9.5 KiB
Swift
240 lines
9.5 KiB
Swift
//
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// ModalDialog.swift
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// VDS
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//
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// Created by Kanamarlapudi, Vasavi on 09/09/24.
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//
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import Foundation
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import UIKit
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import VDSCoreTokens
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@objcMembers
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@objc(VDSModalDialog)
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open class ModalDialog: View, UIScrollViewDelegate, ParentViewProtocol {
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//--------------------------------------------------
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// MARK: - Initializers
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//--------------------------------------------------
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required public init() {
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super.init(frame: .zero)
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}
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public override init(frame: CGRect) {
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super.init(frame: .zero)
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}
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public required init?(coder: NSCoder) {
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super.init(coder: coder)
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}
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//--------------------------------------------------
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// MARK: - Private Properties
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//--------------------------------------------------
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private var scrollView = UIScrollView().with {
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$0.translatesAutoresizingMaskIntoConstraints = false
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$0.backgroundColor = .clear
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}
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private let contentStackView = UIStackView().with {
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$0.translatesAutoresizingMaskIntoConstraints = false
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$0.axis = .vertical
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$0.alignment = .leading
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$0.distribution = .fillProportionally
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$0.spacing = 0
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}
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lazy var primaryAccessibilityElement = UIAccessibilityElement(accessibilityContainer: self).with {
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$0.accessibilityLabel = "Modal"
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}
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//--------------------------------------------------
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// MARK: - Public Properties
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//--------------------------------------------------
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open var children: [any ViewProtocol] { [closeCrossButton, titleLabel, contentLabel, closeButton] }
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open var modalModel = Modal.ModalModel() { didSet { setNeedsUpdate() } }
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open var titleLabel = Label().with { label in
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label.isAccessibilityElement = true
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label.textStyle = .boldTitleMedium
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}
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open var contentLabel = Label().with { label in
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label.isAccessibilityElement = true
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label.textStyle = .bodyLarge
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}
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open lazy var closeCrossButton = ButtonIcon().with {
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$0.kind = .ghost
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$0.surfaceType = .colorFill
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$0.iconName = .close
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$0.size = .small
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$0.customContainerSize = UIDevice.isIPad ? 48 : 48
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$0.customIconSize = UIDevice.isIPad ? 32 : 32
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}
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open lazy var closeButton = Button().with{ $0.use = .secondary; $0.text = "Close"}
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//--------------------------------------------------
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// MARK: - Configuration
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//--------------------------------------------------
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private var closeButtonHeight: CGFloat = 44.0
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private var fullWidth: CGFloat = 296
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private var minHeight: CGFloat = 96.0
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private var maxHeight: CGFloat = 312.0
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private let containerViewInset = VDSLayout.space4X //UIDevice.isIPad ? VDSLayout.space12X : VDSLayout.space4X
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private let contentLabelTopSpace = UIDevice.isIPad ? VDSLayout.space8X : VDSLayout.space6X
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private let contentLabelBottomSpace = UIDevice.isIPad ? VDSLayout.space8X : VDSLayout.space12X
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private let gapBetweenButtonItems = VDSLayout.space3X
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private let backgroundColorConfiguration = SurfaceColorConfiguration(VDSColor.backgroundPrimaryLight, VDSColor.backgroundPrimaryDark)
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private let closeButtonTextColorConfiguration = SurfaceColorConfiguration(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark)
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private var contentStackViewBottomConstraint: NSLayoutConstraint?
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private var heightConstraint: NSLayoutConstraint?
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//--------------------------------------------------
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// MARK: - Overrides
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//--------------------------------------------------
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/// Called once when a view is initialized and is used to Setup additional UI or other constants and configurations.
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open override func setup() {
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super.setup()
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titleLabel.accessibilityTraits = .header
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layer.cornerRadius = 12
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contentStackView.addArrangedSubview(titleLabel)
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contentStackView.addArrangedSubview(contentLabel)
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scrollView.addSubview(contentStackView)
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addSubview(closeCrossButton)
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addSubview(scrollView)
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addSubview(closeButton)
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// Activate constraints
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NSLayoutConstraint.activate([
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widthAnchor.constraint(equalToConstant: fullWidth),
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// Constraints for the scroll view
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scrollView.topAnchor.constraint(equalTo: topAnchor, constant: VDSLayout.space4X),
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scrollView.leadingAnchor.constraint(equalTo: leadingAnchor),
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scrollView.trailingAnchor.constraint(equalTo: trailingAnchor),
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// scrollView.bottomAnchor.constraint(equalTo: line.topAnchor),
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// line.leadingAnchor.constraint(equalTo: leadingAnchor),
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// line.trailingAnchor.constraint(equalTo: trailingAnchor),
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closeButton.topAnchor.constraint(equalTo: scrollView.bottomAnchor),
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closeButton.leadingAnchor.constraint(equalTo: leadingAnchor),
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closeButton.trailingAnchor.constraint(equalTo: trailingAnchor),
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closeButton.bottomAnchor.constraint(equalTo: bottomAnchor),
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closeButton.heightAnchor.constraint(equalToConstant: closeButtonHeight),
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contentStackView.topAnchor.constraint(equalTo: scrollView.topAnchor),
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contentStackView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor, constant: containerViewInset),
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contentStackView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor, constant: -containerViewInset),
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contentStackView.widthAnchor.constraint(equalTo: scrollView.widthAnchor, constant: -(containerViewInset * 2)),
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])
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contentStackViewBottomConstraint = contentStackView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor)
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contentStackViewBottomConstraint?.activate()
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heightConstraint = heightAnchor.constraint(equalToConstant: minHeight)
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heightConstraint?.activate()
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}
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/// Used to make changes to the View based off a change events or from local properties.
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open override func updateView() {
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super.updateView()
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backgroundColor = backgroundColorConfiguration.getColor(self)
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scrollView.indicatorStyle = surface == .light ? .black : .white
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contentStackView.arrangedSubviews.forEach { $0.removeFromSuperview() }
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titleLabel.surface = surface
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contentLabel.surface = surface
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titleLabel.text = modalModel.title
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contentLabel.text = modalModel.content
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titleLabel.sizeToFit()
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contentLabel.sizeToFit()
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var addedTitle = false
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if let titleText = modalModel.title, !titleText.isEmpty {
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contentStackView.addArrangedSubview(titleLabel)
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addedTitle = true
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}
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var addedContent = false
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if let contentText = modalModel.content, !contentText.isEmpty {
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contentStackView.addArrangedSubview(contentLabel)
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addedContent = true
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} else if let contentView = modalModel.contentView {
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contentView.translatesAutoresizingMaskIntoConstraints = false
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if var surfaceable = contentView as? Surfaceable {
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surfaceable.surface = surface
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}
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contentStackView.addArrangedSubview(contentView)
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addedContent = true
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}
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if addedTitle && addedContent {
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contentStackView.setCustomSpacing(VDSLayout.space1X, after: titleLabel)
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}
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let closeButtonTextColor = closeButtonTextColorConfiguration.getColor(self)
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closeButton.setTitleColor(closeButtonTextColor, for: .normal)
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closeButton.setTitleColor(closeButtonTextColor, for: .highlighted)
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closeButton.setTitle(modalModel.closeButtonText, for: .normal)
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closeButton.accessibilityLabel = modalModel.closeButtonText
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contentStackView.setNeedsLayout()
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contentStackView.layoutIfNeeded()
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scrollView.setNeedsLayout()
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scrollView.layoutIfNeeded()
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//dealing with height
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//we can't really use the minMax height and set constraints for
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//greaterThan or lessThan on the heightAnchor due to scrollView/stackView intrinsic size
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//therefore we can do a little math and manually set the height based off all of the content
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var contentHeight = closeButtonHeight + scrollView.contentSize.height + (containerViewInset * 2)
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//reset the bottomConstraint
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contentStackViewBottomConstraint?.constant = 0
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if contentHeight < minHeight {
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contentHeight = minHeight
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} else if contentHeight > maxHeight {
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contentHeight = maxHeight
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//since we are now scrolling, add padding to the bottom of the
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//stackView between the bottom of the scrollView
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contentStackViewBottomConstraint?.constant = -containerViewInset
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}
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heightConstraint?.constant = contentHeight
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}
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/// Used to update any Accessibility properties.
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open override func updateAccessibility() {
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super.updateAccessibility()
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primaryAccessibilityElement.accessibilityHint = "Double tap on the \(modalModel.closeButtonText) button to close."
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primaryAccessibilityElement.accessibilityFrameInContainerSpace = .init(origin: .zero, size: frame.size)
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}
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open override var accessibilityElements: [Any]? {
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get {
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var elements: [Any] = [primaryAccessibilityElement]
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contentStackView.arrangedSubviews.forEach{ elements.append($0) }
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elements.append(closeButton)
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return elements
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}
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set {}
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}
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}
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