Forem: hori,masaki

Helpers for Process class in Swift.

hori,masaki — Sat, 30 Dec 2017 12:09:07 +0000

Process() <<< "/bin/echo" <<< ["Hello, World.\nこんにちは世界。"]
    | Process() <<< "/usr/bin/grep" <<< ["Hello"]
    >>> { output in

    output.string.map { print($0) }    // Hello, World.
}

Helpers below.

/// 出力を簡単に扱うための補助的な型。FileHandleを隠蔽する。
struct Output {

    private let fileHandle: FileHandle

    init(fileHandle: FileHandle) {
        self.fileHandle = fileHandle
    }

    var data: Data {
        return fileHandle.readDataToEndOfFile()
    }

    var string: String? {
        return String(data: data, encoding: .utf8)
    }

    var lines: [String] {
        return string?.components(separatedBy: "\n") ?? []
    }
}

precedencegroup ArgumentPrecedence {

    associativity: left
    higherThan: AdditionPrecedence
}
infix operator <<< : ArgumentPrecedence

/// Processにexecutable pathを設定する。
func <<< (lhs: Process, rhs: String) -> Process {

    lhs.executableURL = URL(fileURLWithPath: rhs)
    return lhs
}

/// Processに引数を設定する。
func <<< (lhs: Process, rhs: [String]) -> Process {

    lhs.arguments = rhs
    return lhs
}

/// Processをパイプする。
func | (lhs: Process, rhs: Process) -> Process {

    let pipe = Pipe()

    lhs.standardOutput = pipe
    rhs.standardInput = pipe
    lhs.launch()

    return rhs
}

precedencegroup RedirectPrecedence {

    associativity: left
    lowerThan: LogicalDisjunctionPrecedence
}
infix operator >>> : RedirectPrecedence

/// Processの出力をOutput型で受け取り加工などができる。
/// ジェネリクスを利用しているのでどのような型にでも変換して返せる。
func >>> <T>(lhs: Process, rhs: (Output) -> T) -> T {

    let pipe = Pipe()
    lhs.standardOutput = pipe
    lhs.launch()

    return rhs(Output(fileHandle: pipe.fileHandleForReading))
}

genstrings with Swift

hori,masaki — Mon, 25 Dec 2017 12:18:43 +0000

1st step
Localizable protocol in Localizable.swft

import Foundation

protocol Localizable {

    var key: String { get }
    var bundle: Bundle { get }
    var comment: String { get }

    var string: String { get }
}

extension Localizable {

    var string: String {

        return NSLocalizedString(key, tableName: nil, bundle: bundle, comment: comment)
    }
}

struct LocalizedString: Localizable {

    let key: String
    let bundle: Bundle = .main
    let comment: String


    init(_ string: String, comment: String) {
        self.key = string
        self.comment = comment
    }
}

2nd step
LocalizedStrings struct in LocalizedStrings.swift.

this file is actual Localize settings.

struct LocalizedStrings {

    static let hoge = LocalizedString("Hoge", comment: "Hoge Comment")
    static let foo = LocalizedString("Foo", comment: "Foo Comment")
}

3rd step
run genstrings with 's'option to 'LocalizedStrings.swift'

genstrings -s LocalizedString LocalizedStrings.swift

4th step
use LocalizedStrings in your code.

let foo = LocalizedStrings.foo.string  // getting localized string.

Type safe NSViewAnimation

hori,masaki — Mon, 25 Dec 2017 12:09:03 +0000

protocol ViewAnimationTarget {}
extension NSView: ViewAnimationTarget {}
extension NSWindow: ViewAnimationTarget {}

struct ViewAnimationAttributes {

    private(set) var animations: [NSViewAnimation.Key: Any]

    init(target: ViewAnimationTarget, startFrame: NSRect? = nil, endFrame: NSRect? = nil, effect: NSViewAnimation.EffectName? = nil ) {

        animations = [.target: target]
        animations[.startFrame] = startFrame
        animations[.endFrame] = endFrame
        animations[.effect] = effect
    }

    var startFrame: NSRect? {
        get { return animations[.startFrame] as? NSRect }
        set { animations[.startFrame] = newValue }
    }

    var endFrame: NSRect? {
        get { return animations[.endFrame] as? NSRect }
        set { animations[.endFrame] = newValue }
    }

    var effect: NSViewAnimation.EffectName? {
        get { return animations[.effect] as? NSViewAnimation.EffectName }
        set { animations[.effect] = newValue }
    }
}

class ViewAnimation: NSViewAnimation, NSAnimationDelegate {

    var completeHandler: (() -> Void)?

    init(viewAnimations: [ViewAnimationAttributes]) {

        super.init(viewAnimations: viewAnimations.map { $0.animations })
    }

    required init?(coder: NSCoder) {
        fatalError("Can not initialize with NSCoder")
    }

    /// コンプリートハンドラー付き
    /// start with completion handler
    func start(completeHandler: @escaping () -> Void) {

        delegate = self
        self.completeHandler = completeHandler

        start()
    }

    ///
    func animationDidEnd(_ animation: NSAnimation) {

        completeHandler?()
        delegate = nil
        completeHandler = nil
    }
}

example

let view1 = NSView()

// 個々を別々に設定
// divide initialize and setting. 
var animeAttr1 = ViewAnimationAttributes(target: view1)
animeAttr1.startFrame = NSRect(x: 0, y: 0, width: 100, height: 100)
animeAttr1.endFrame = NSRect(x: 100, y: 100, width: 100, height: 100)
animeAttr1.effect = .fadeIn

let view2 = NSView()

// 初期化時に全部設定
// initialize with all setting.
let animeAttr2 = ViewAnimationAttributes(target: view2,
                                         startFrame: NSRect(x: 100, y: 100, width: 100, height: 100),
                                         endFrame: NSRect(x: 0, y: 0, width: 100, height: 100),
                                         effect: .fadeOut)

let animation = ViewAnimation(viewAnimations: [animeAttr1, animeAttr2])

animation.duration = 0.5

// コンプリートハンドラー付きstart
/// start with completion handler
animation.start {
    print("Finish animation")
}

Observing notification only once

hori,masaki — Mon, 25 Dec 2017 12:05:32 +0000

extension NotificationCenter {

    func addObserverOnce(forName name: NSNotification.Name?, object obj: Any?, queue: OperationQueue?, using block: @escaping (Notification) -> Void) {

        weak var token: NSObjectProtocol?
        token = addObserver(forName: name, object: obj, queue: queue) {notification in

            token.map(self.removeObserver)
            block(notification)
        }
    }
}

Mute per WKWebView like Safari!

hori,masaki — Thu, 16 Nov 2017 06:44:55 +0000

MuteableWKWebView

Provide muted property for WKWebView.