added rotor

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>
This commit is contained in:
Matt Bruce 2023-08-24 14:19:46 -05:00
parent 0777898e8a
commit ab16fb4642
2 changed files with 111 additions and 0 deletions

View File

@ -48,6 +48,7 @@
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View File

@ -0,0 +1,107 @@
//
// AccessibilityCustomRotorable.swift
// VDS
//
// Created by Matt Bruce on 8/24/23.
//
import Foundation
import UIKit
public protocol CustomRotorable: UIViewController {
var customRotorCache: [String: [UIView]] { get set }
var customRotors: [CustomRotorType] { get set }
}
extension CustomRotorable {
/// Adds CustomRotor to the accessibilityCustomRotors array.
/// - Parameters:
/// - name: Name that will show up in the Rotor picker.
/// - trait: Any UIView that has this traits will be added to this Name.
internal func addCustomRotor(with name: String, for trait: UIAccessibilityTraits) {
//filter out old rotors with same name
accessibilityCustomRotors = (accessibilityCustomRotors ?? []).filter { $0.name != name }
//create new rotor
let newRotor = UIAccessibilityCustomRotor(name: name) { [weak self] predicate in
guard let self else { return nil }
//create the view accessibleElements cache if it doesn't exist
if self.customRotorCache[name] == nil {
self.customRotorCache[name] = self.view.accessibleElements(with: trait)
}
guard let views = self.customRotorCache[name], !views.isEmpty else { return nil }
let currentIndex = views.firstIndex(where: { $0 === predicate.currentItem.targetElement })
let count = views.count
//find the nextIndex
let nextIndex: Int
switch predicate.searchDirection {
case .next:
if let currentIndex, currentIndex != count - 1{
//go forwards
nextIndex = currentIndex + 1
} else {
//get the first
nextIndex = 0
}
case .previous:
if let currentIndex, currentIndex != 0 {
//go backwards
nextIndex = currentIndex - 1
} else {
//get the last
nextIndex = count - 1
}
@unknown default:
//get the first
nextIndex = 0
}
return UIAccessibilityCustomRotorItemResult(targetElement: views[nextIndex], targetRange: nil)
}
//append rotor
accessibilityCustomRotors?.append(newRotor)
}
/// Loads all of the custom rotors for the screen.
public func loadCustomRotors() {
customRotorCache.removeAll()
UIAccessibility.post(notification: .screenChanged, argument: nil)
customRotors.forEach { addCustomRotor(with: $0.name, for: $0.trait) }
}
}
public extension UIView {
/// Gets all of the Views that has the matching accessibilityTrait.
/// - Parameter trait: This is the trailt for the accessibilityTrait property of a view.
/// - Returns: An array of RotorItemResult
func accessibleElements(with trait: UIAccessibilityTraits) -> [UIView] {
var elements: [UIView] = []
//add your self if you meet the requirements
if isAccessibilityElement, accessibilityTraits.contains(trait) {
elements.append(self)
}
//loop through your subviews
subviews.forEach { elements.append(contentsOf: $0.accessibleElements(with: trait)) }
return elements
}
}
public struct CustomRotorType {
public var name: String
public var trait: UIAccessibilityTraits
public init(name: String, trait: UIAccessibilityTraits) {
self.name = name
self.trait = trait
}
}