douglashill

// Avoids the keyboard in a UIKit app by leveraging additionalSafeAreaInsets.
// You can put this in the root view controller so the whole app will avoid the keyboard.
// Only tested on iOS 13.3.
// Made for https://douglashill.co/reading-app/
@objc func updateSafeAreaForKeyboardFromNotification(_ notification: Notification) {
    guard let endFrameInScreenCoords = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect else {
        return
    }

    // Please consider whether the force unwrap here is safe for your own use case.

douglashill

/// Performs a textual find and replace with the specified substitutions on all files in directory (recursive) that have the specified filename extensions.
func find(_ substitutions: [(find: String, replace: String)], allowedExtensions: Set<String>, directory rootURL: URL) {
    let fileURLs = FileManager.default.enumerator(at: rootURL, includingPropertiesForKeys: nil)!.map {
        $0 as! URL
    }
    .filter {
        $0.hasDirectoryPath == false
    }
    .filter {
        allowedExtensions.contains($0.pathExtension)

douglashill

// Douglas Hill, April 2017
// From https://douglashill.co/reading-app/

#if os(macOS)
import AppKit

public typealias Colour = NSColor
public typealias Font = NSFont
public typealias FontDescriptor = NSFontDescriptor
public typealias Image = NSImage

douglashill

// Douglas Hill, December 2019
// Made for https://douglashill.co/reading-app/

import Foundation

/// Tries really hard to read a string from a file.
///
/// Brute forces encodings if necessary. This will only fail if the file can’t be interpreted
/// in any encoding, or if some other error occurs like not being able to read from the file.
///

douglashill

// Douglas Hill, May 2019
// Find the latest version of this file at https://github.com/douglashill/KeyboardKit

import UIKit

/// A tab bar controller that allows navigating between tabs using cmd+number on a hardware keyboard.
/// So cmd+1 for the first tab, cmd+2 for the second tab etc.
public class KeyboardTabBarController: UITabBarController {

    public override var keyCommands: [UIKeyCommand]? {

douglashill

// Douglas Hill, November 2019
// Find the latest version of this file at https://github.com/douglashill/KeyboardKit

import UIKit

/// A scroll view that allows scrolling using a hardware keyboard like `NSScrollView`.
/// Supports arrow keys, option + arrow keys, command + arrow keys, space bar, page up, page down, home and end.
/// Limitations:
/// - Paging scroll views (isPagingEnabled = true) are not supported yet.
/// - The scroll view must become its own delegate so setting the delegate is not supported yet.

douglashill

@import UIKit;

@interface SceneDelegate : UIResponder <UIWindowSceneDelegate>
@end

@implementation SceneDelegate

@synthesize window = _window;

- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {

douglashill

import UIKit

/// A wrapper view controller that makes the horizontal size class
/// be based on both the Dynamic Text size and the width available.
class AdaptiveTraitsContainer: UIViewController {
    let wrappedViewController: UIViewController

    init(wrappedViewController: UIViewController) {
        self.wrappedViewController = wrappedViewController
        super.init(nibName: nil, bundle: nil)

douglashill

// Douglas Hill, December 2018
// Made for https://douglashill.co/reading-app/
// Find the latest version of this file at https://github.com/douglashill/KeyboardKit

import UIKit

/// A table view that allows navigation and selection using a hardware keyboard.
/// Only supports a single section.
class KeyboardTableView: UITableView {
    // These properties may be set or overridden to provide discoverability titles for key commands.

douglashill

@implementation PSPDFTableViewCell // UITableViewCell subclass

/**
 On iOS 10, constraints involving a UITableViewCell’s contentView’s layoutMarginsGuide are removed for some
 reason before the cell appears, which breaks the layout. This layout guide is a working alternative.
 */
- (UILayoutGuide *)pspdf_layoutMarginsGuide {
    if (@available(iOS 11.0, *)) {
        return self.contentView.layoutMarginsGuide;
    }