Attractor/App/AppDelegate.swift

//
//  AppDelegate.swift
//  SBrowser
//
//  Created by James Magahern on 7/21/20.
//

import UIKit

@main
class AppDelegate: UIResponder, UIApplicationDelegate {
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool
    {
        return true
    }

    // MARK: UISceneSession Lifecycle

    func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration
    {
        if let userActivity = options.userActivities.first {
            if userActivity.activityType == SessionActivityType.SettingsWindow.rawValue {
                return UISceneConfiguration(name: "Settings", sessionRole: connectingSceneSession.role)
            }
        }
        
        return UISceneConfiguration(name: "Browser", sessionRole: connectingSceneSession.role)
    }
    
    static func appMenuShortcuts() -> [UIKeyCommand] {
        [
            // Preferences
            UIKeyCommand(
                modifiers: .command,
                input: ",",
                title: "Preferences",
                action: #selector(ShortcutResponder.showPreferences)
            )
        ]
    }
    
    static func fileMenuShortcuts() -> [UIKeyCommand] {
        [
            // Open Location...
            UIKeyCommand(
                modifiers: .command, input: "L",
                title: "Open Location",
                action: #selector(ShortcutResponder.focusURLBar)
            ),
            
            // Focus Web View
            UIKeyCommand(
                modifiers: .command, input: "e",
                title: "Focus Web View",
                action: #selector(ShortcutResponder.focusWebView)
            ),
            
            // Go Back
            UIKeyCommand(
                modifiers: .command, input: "[",
                title: "Go Back",
                action: #selector(ShortcutResponder.goBack)
            ),
            
            // Go Forward
            UIKeyCommand(
                modifiers: .command, input: "]",
                title: "Go Forward",
                action: #selector(ShortcutResponder.goForward)
            ),
            
            // Create Tab
            UIKeyCommand(
                modifiers: .command, input: "T",
                title: "New Tab",
                action: #selector(ShortcutResponder.createTab)
            ),
            
            // Previous Tab
            UIKeyCommand(
                modifiers: [.command, .shift], input: "[",
                title: "Previous Tab",
                action: #selector(ShortcutResponder.previousTab)
            ),
            
            // Close tab
            UIKeyCommand(
                modifiers: [.command], input: "W",
                title: "Close Tab",
                action: #selector(ShortcutResponder.closeTab)
            ),
            
            // Next Tab
            UIKeyCommand(
                modifiers: [.command, .shift], input: "]",
                title: "Next Tab",
                action: #selector(ShortcutResponder.nextTab)
            ),
            
            // Find on page
            (FindOnPageViewController.isEnabled() ?
                UIKeyCommand(
                    modifiers: [.command], input: "F",
                    title: "Find on Page",
                    action: #selector(ShortcutResponder.findOnPage)
                )
             : UIKeyCommand.null()
            ),
            
            // Refresh
            UIKeyCommand(
                modifiers: [.command], input: "R",
                title: "Refresh",
                action: #selector(ShortcutResponder.refresh)
            ),
            
            // Toggle Dark Mode
            UIKeyCommand(
                modifiers: [.command], input: "M",
                title: "Toggle Dark Mode",
                action: #selector(ShortcutResponder.toggleDarkMode)
            ),
        ]
    }
    
    override var keyCommands: [UIKeyCommand]? {
        get { return Self.fileMenuShortcuts() + Self.appMenuShortcuts() }
    }
    
    override func buildMenu(with builder: UIMenuBuilder) {
        builder.replaceChildren(ofMenu: .file) { children in
             return Self.fileMenuShortcuts() + children
        }
        
        builder.remove(menu: .format)
        
        builder.replaceChildren(ofMenu: .application, from: { children in
            let index = children.firstIndex(where: { elem in
                if let elem = elem as? UIMenu {
                    return elem.identifier == .about
                }
                return false
            })
            
            var newChildren = children
            if let index = index {
                newChildren.insert(contentsOf: Self.appMenuShortcuts(), at: index + 1)
            } else {
                newChildren.append(contentsOf: Self.appMenuShortcuts())
            }
            
            return newChildren
        })
    }
}