/
Utilities.swift
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Utilities.swift
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// Copyright © 2017 Schibsted. All rights reserved.
import UIKit
// Flatten an array of dictionaries
func merge(_ dictionaries: [[String: Any]]) -> [String: Any] {
var result = [String: Any]()
for dict in dictionaries {
for (key, value) in dict {
result[key] = value
}
}
return result
}
private let classPrefix = (Bundle.main.object(forInfoDictionaryKey: "CFBundleName") as? String ?? "")
.replacingOccurrences(of: "[^a-zA-Z0-9_]", with: "_", options: .regularExpression)
// Get a class by name, adding project prefix if needed
func classFromString(_ name: String) -> AnyClass? {
return NSClassFromString(name) ?? NSClassFromString("\(classPrefix).\(name)")
}
// Get the name of a class, without project prefix
func nameOfClass(_ name: AnyClass) -> String {
let name = NSStringFromClass(name)
let prefix = "\(classPrefix)."
if name.hasPrefix(prefix) {
return String(name[prefix.endIndex...])
}
return name
}
// Get a protocol by name
func protocolFromString(_ name: String) -> Protocol? {
return NSProtocolFromString(name) ?? NSProtocolFromString("\(classPrefix).\(name)")
}
// Internal API for converting a path to a full URL
func urlFromString(_ path: String, relativeTo baseURL: URL? = nil) -> URL {
if path.hasPrefix("~") {
let path = path.removingPercentEncoding ?? path
return URL(fileURLWithPath: (path as NSString).expandingTildeInPath)
} else if let url = URL(string: path, relativeTo: baseURL), url.scheme != nil {
return url
}
// Check if url has a scheme
if baseURL != nil || path.contains(":") {
let path = path.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? path
if let url = URL(string: path, relativeTo: baseURL) {
return url
}
}
// Assume local path
if (path as NSString).isAbsolutePath {
return URL(fileURLWithPath: path.removingPercentEncoding ?? path)
} else {
return Bundle.main.resourceURL!.appendingPathComponent(path)
}
}
// MARK: Approximate equality
private let precision: CGFloat = 0.001
extension CGPoint {
func isNearlyEqual(to other: CGPoint) -> Bool {
return abs(x - other.x) <= precision && abs(y - other.y) <= precision
}
}
extension CGSize {
func isNearlyEqual(to other: CGSize) -> Bool {
return abs(width - other.width) <= precision && abs(height - other.height) <= precision
}
}
extension CGRect {
func isNearlyEqual(to other: CGRect) -> Bool {
return size.isNearlyEqual(to: other.size) && origin.isNearlyEqual(to: other.origin)
}
}
extension UIEdgeInsets {
func isNearlyEqual(to other: UIEdgeInsets) -> Bool {
return
abs(left - other.left) <= precision &&
abs(right - other.right) <= precision &&
abs(top - other.top) <= precision &&
abs(bottom - other.bottom) <= precision
}
}
// MARK: Backwards compatibility
struct IntOptionSet: OptionSet {
let rawValue: Int
init(rawValue: Int) {
self.rawValue = rawValue
}
}
struct UIntOptionSet: OptionSet {
let rawValue: UInt
init(rawValue: UInt) {
self.rawValue = rawValue
}
}
#if !swift(>=3.4)
extension UIFont {
typealias Weight = UIFontWeight
}
#endif
#if !swift(>=4)
extension NSAttributedString {
struct DocumentType {
static let html = NSHTMLTextDocumentType
}
struct DocumentReadingOptionKey {
static let documentType = NSDocumentTypeDocumentAttribute
static let characterEncoding = NSCharacterEncodingDocumentAttribute
}
}
extension NSAttributedStringKey {
static let foregroundColor = NSForegroundColorAttributeName
static let font = NSFontAttributeName
static let paragraphStyle = NSParagraphStyleAttributeName
}
extension UIFont.Weight {
static let ultraLight = UIFontWeightUltraLight
static let thin = UIFontWeightThin
static let light = UIFontWeightLight
static let regular = UIFontWeightRegular
static let medium = UIFontWeightMedium
static let semibold = UIFontWeightSemibold
static let bold = UIFontWeightBold
static let heavy = UIFontWeightHeavy
static let black = UIFontWeightBlack
}
extension UIFontDescriptor {
struct AttributeName {
static let traits = UIFontDescriptorTraitsAttribute
}
typealias TraitKey = NSString
}
extension UIFontDescriptor.TraitKey {
static let weight = UIFontWeightTrait as NSString
}
extension UILayoutPriority {
var rawValue: Float { return self }
init(rawValue: Float) { self = rawValue }
static let required = UILayoutPriorityRequired
static let defaultHigh = UILayoutPriorityDefaultHigh
static let defaultLow = UILayoutPriorityDefaultLow
static let fittingSizeLevel = UILayoutPriorityFittingSizeLevel
}
#endif
#if !swift(>=4.2)
extension UIContentSizeCategory {
static let didChangeNotification = NSNotification.Name.UIContentSizeCategoryDidChange
}
extension NSAttributedString {
typealias Key = NSAttributedStringKey
}
extension NSLayoutConstraint {
typealias Axis = UILayoutConstraintAxis
}
extension UIFont {
typealias TextStyle = UIFontTextStyle
}
extension UIFontDescriptor {
typealias SymbolicTraits = UIFontDescriptorSymbolicTraits
}
extension UIAccessibilityTraits {
static var tabBar: UIAccessibilityTraits {
if #available(iOS 10, *) {
return UIAccessibilityTraitTabBar
}
preconditionFailure("UIAccessibilityTraitTabBar is not available")
}
static let none = UIAccessibilityTraitNone
static let button = UIAccessibilityTraitButton
static let link = UIAccessibilityTraitLink
static let header = UIAccessibilityTraitHeader
static let searchField = UIAccessibilityTraitSearchField
static let image = UIAccessibilityTraitImage
static let selected = UIAccessibilityTraitSelected
static let playsSound = UIAccessibilityTraitPlaysSound
static let keyboardKey = UIAccessibilityTraitKeyboardKey
static let staticText = UIAccessibilityTraitStaticText
static let summaryElement = UIAccessibilityTraitSummaryElement
static let notEnabled = UIAccessibilityTraitNotEnabled
static let updatesFrequently = UIAccessibilityTraitUpdatesFrequently
static let startsMediaSession = UIAccessibilityTraitStartsMediaSession
static let adjustable = UIAccessibilityTraitAdjustable
static let allowsDirectInteraction = UIAccessibilityTraitAllowsDirectInteraction
static let causesPageTurn = UIAccessibilityTraitCausesPageTurn
}
extension UIActivity {
typealias ActivityType = UIActivityType
}
extension UIView {
typealias ContentMode = UIViewContentMode
typealias AutoresizingMask = UIViewAutoresizing
typealias TintAdjustmentMode = UIViewTintAdjustmentMode
static let noIntrinsicMetric = UIViewNoIntrinsicMetric
@nonobjc func bringSubviewToFront(_ subview: UIView) {
bringSubview(toFront: subview)
}
}
extension UIViewController {
@nonobjc func addChild(_ child: UIViewController) {
addChildViewController(child)
}
@nonobjc func removeFromParent() {
removeFromParentViewController()
}
}
extension UIControl {
typealias State = UIControlState
typealias Event = UIControlEvents
typealias ContentVerticalAlignment = UIControlContentVerticalAlignment
typealias ContentHorizontalAlignment = UIControlContentHorizontalAlignment
}
extension UIBarButtonItem {
typealias SystemItem = UIBarButtonSystemItem
typealias Style = UIBarButtonItemStyle
}
extension UIButton {
typealias ButtonType = UIButtonType
}
extension UIActivityIndicatorView {
typealias Style = UIActivityIndicatorViewStyle
}
extension UIProgressView {
typealias Style = UIProgressViewStyle
}
extension UIInputView {
typealias Style = UIInputViewStyle
}
extension UIDatePicker {
typealias Mode = UIDatePickerMode
}
extension UITextField {
typealias BorderStyle = UITextBorderStyle
typealias ViewMode = UITextFieldViewMode
}
extension UITabBar {
typealias ItemPositioning = UITabBarItemPositioning
}
extension UITabBarItem {
typealias SystemItem = UITabBarSystemItem
}
extension UITableView {
typealias Style = UITableViewStyle
static let automaticDimension = UITableViewAutomaticDimension
}
extension UITableViewCell {
typealias CellStyle = UITableViewCellStyle
typealias AccessoryType = UITableViewCellAccessoryType
typealias FocusStyle = UITableViewCellFocusStyle
typealias SelectionStyle = UITableViewCellSelectionStyle
typealias SeparatorStyle = UITableViewCellSeparatorStyle
}
extension UISearchBar {
typealias Style = UISearchBarStyle
}
extension UISegmentedControl {
typealias Segment = UISegmentedControlSegment
}
extension UIScrollView {
typealias IndicatorStyle = UIScrollViewIndicatorStyle
typealias IndexDisplayMode = UIScrollViewIndexDisplayMode
typealias KeyboardDismissMode = UIScrollViewKeyboardDismissMode
}
extension UICollectionView {
typealias ScrollDirection = UICollectionViewScrollDirection
}
extension UIStackView {
typealias Alignment = UIStackViewAlignment
typealias Distribution = UIStackViewDistribution
}
extension UIWebView {
typealias PaginationMode = UIWebPaginationMode
typealias PaginationBreakingMode = UIWebPaginationBreakingMode
}
extension UIAlertController {
typealias Style = UIAlertControllerStyle
}
extension UIImagePickerController {
typealias CameraCaptureMode = UIImagePickerControllerCameraCaptureMode
typealias CameraDevice = UIImagePickerControllerCameraDevice
typealias CameraFlashMode = UIImagePickerControllerCameraFlashMode
typealias SourceType = UIImagePickerControllerSourceType
typealias QualityType = UIImagePickerControllerQualityType
}
extension UISplitViewController {
typealias DisplayMode = UISplitViewControllerDisplayMode
}
extension UIBlurEffect {
typealias Style = UIBlurEffectStyle
}
#endif