Swift：キー入力・マウスクリック・ドラッグ・座標移動・ホイール入力を強制的に発動させる

#はじめに

プロジェクト名.entitlementsのApp SandBoxをYesからNoに変更してください．
macOS Mojaveからなのか確認できていませんが，App SandBoxの有無に関わらず，環境設定のアクセシビリティの制御許可を与えないと動かないものがあるっぽいです．

本記事の手法はあくまでmacOS向けのものです．

#キー入力

##単キー入力

func keyDown(key: CGKeyCode) {
    let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
    let event = CGEvent(keyboardEventSource: source, virtualKey: key, keyDown: true)
    event?.post(tap: CGEventTapLocation.cghidEventTap)
}
    
func keyUp(key: CGKeyCode) {
    let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
    let event = CGEvent(keyboardEventSource: source, virtualKey: key, keyDown: false)
    event?.post(tap: CGEventTapLocation.cghidEventTap)
}

// 使用例
keyDown(key: 0x7E) //　0x7Eは↑キー
keyUp(key: 0x7E)

###CGKeyCode(US配列)

key name	code	key name	code
kVK_ANSI_A	0x00	kVK_ANSI_I	0x22
kVK_ANSI_S	0x01	kVK_ANSI_P	0x23
kVK_ANSI_D	0x02	kVK_ANSI_L	0x25
kVK_ANSI_F	0x03	kVK_ANSI_J	0x26
kVK_ANSI_H	0x04	kVK_ANSI_Quote	0x27
kVK_ANSI_G	0x05	kVK_ANSI_K	0x28
kVK_ANSI_Z	0x06	kVK_ANSI_Semicolon	0x29
kVK_ANSI_X	0x07	kVK_ANSI_Backslash	0x2A
kVK_ANSI_C	0x08	kVK_ANSI_Comma	0x2B
kVK_ANSI_V	0x09	kVK_ANSI_Slash	0x2C
kVK_ANSI_B	0x0B	kVK_ANSI_N	0x2D
kVK_ANSI_Q	0x0C	kVK_ANSI_M	0x2E
kVK_ANSI_W	0x0D	kVK_ANSI_Period	0x2F
kVK_ANSI_E	0x0E	kVK_ANSI_Grave	0x32
kVK_ANSI_R	0x0F	kVK_ANSI_KeypadDecimal	0x41
kVK_ANSI_Y	0x10	kVK_ANSI_KeypadMultiply	0x43
kVK_ANSI_T	0x11	kVK_ANSI_KeypadPlus	0x45
kVK_ANSI_1	0x12	kVK_ANSI_KeypadClear	0x47
kVK_ANSI_2	0x13	kVK_ANSI_KeypadDivide	0x4B
kVK_ANSI_3	0x14	kVK_ANSI_KeypadEnter	0x4C
kVK_ANSI_4	0x15	kVK_ANSI_KeypadMinus	0x4E
kVK_ANSI_6	0x16	kVK_ANSI_KeypadEquals	0x51
kVK_ANSI_5	0x17	kVK_ANSI_Keypad0	0x52
kVK_ANSI_Equal	0x18	kVK_ANSI_Keypad1	0x53
kVK_ANSI_9	0x19	kVK_ANSI_Keypad2	0x54
kVK_ANSI_7	0x1A	kVK_ANSI_Keypad3	0x55
kVK_ANSI_Minus	0x1B	kVK_ANSI_Keypad4	0x56
kVK_ANSI_8	0x1C	kVK_ANSI_Keypad5	0x57
kVK_ANSI_0	0x1D	kVK_ANSI_Keypad6	0x58
kVK_ANSI_RightBracket	0x1E	kVK_ANSI_Keypad7	0x59
kVK_ANSI_O	0x1F	kVK_ANSI_Keypad8	0x5B
kVK_ANSI_U	0x20	kVK_ANSI_Keypad9	0x5C
kVK_ANSI_LeftBracket	0x21

##修飾キーを付加したキー入力

func keyDown(key: CGKeyCode, with: CGEventFlags) {
    let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
    let event = CGEvent(keyboardEventSource: source, virtualKey: key, keyDown: true)
    event?.flags = with
    event?.post(tap: CGEventTapLocation.cghidEventTap)
}
    
func keyUp(key: CGKeyCode, with: CGEventFlags) {
    let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
    let event = CGEvent(keyboardEventSource: source, virtualKey: key, keyDown: false)
    event?.flags = with
    event?.post(tap: CGEventTapLocation.cghidEventTap)
}

// 使用例
// Control + A
keyDown(key: 0x00, with: CGEventFlags.maskControl)
keyUp(key: 0x00, with: CGEventFlags.maskControl)

// Shift + Control + A
keyDown(key: 0x00, with: CGEventFlags.maskShift.union(CGEventFlags.maskControl))
keyUp(key: 0x00, with: CGEventFlags.maskShift.union(CGEventFlags.maskControl))

よく使う修飾キー
Optionキー：CGEventFlags.maskAlternate
Shiftキー：CGEventFlags.maskShift
Commandキー：CGEventFlags.maskCommand
Controlキー：CGEventFlags.maskControl

#マウスクリック&ドラッグ

func leftClickDown(position: CGPoint) {
    let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
    let event = CGEvent(mouseEventSource: source, mouseType: CGEventType.leftMouseDown, 
                        mouseCursorPosition: position, mouseButton: CGMouseButton.left)
    event?.post(tap: CGEventTapLocation.cghidEventTap)
}
    
func leftClickUp(position: CGPoint) {
    let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
    let event = CGEvent(mouseEventSource: source, mouseType: CGEventType.leftMouseUp, 
                        mouseCursorPosition: position, mouseButton: CGMouseButton.left)
    event?.post(tap: CGEventTapLocation.cghidEventTap)
}
    
func leftDragged(to: CGPoint, from: CGPoint) {
    leftClickDown(position: from)
    let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
    let event = CGEvent(mouseEventSource: source, mouseType: CGEventType.leftMouseDragged, 
                        mouseCursorPosition: to, mouseButton: CGMouseButton.left)
    event?.post(tap: CGEventTapLocation.cghidEventTap)
    leftClickUp(position: to)
}

// 使用例
// 現在のマウス座標にてクリックを行う
var location = NSEvent.mouseLocation
for screen in NSScreen.screens {
    if screen.frame.contains(location) {
        location = CGPoint(x: location.x, y: NSHeight(screen.frame) - location.y)
        break
    }
}
leftClickDown(position: location)
leftClickUp(position: location)

// 現在のマウス座標からx座標+200px, y座標＋２００pxの地点に向けてドラッグを行う
leftDragged(to: CGPoint(x: location.x + 200, y: location.y + 200), from: location)

#マウス座標移動

func moveMouse(dx: CGFloat, dy: CGFloat) {
    var location = NSEvent.mouseLocation
    for screen in NSScreen.screens {
        if screen.frame.contains(location) {
            location = CGPoint(x: location.x, y: NSHeight(screen.frame) - location.y)
            location = CGPoint(x: location.x - dx, y: location.y + dy)
            CGDisplayMoveCursorToPoint(0, location)
            break
        }
    }
}

#ホイール入力

func wheel(dx: Int32, dy: Int32) {
    appDelegate.toggleIgnore(flag: false)
    let source = CGEventSource(stateID: CGEventSourceStateID.hidSystemState)
    let event = CGEvent(scrollWheelEvent2Source: source, units: CGScrollEventUnit.pixel,
                        wheelCount: 25, wheel1: dy, wheel2: dx, wheel3: 0)
    event?.post(tap: CGEventTapLocation.cghidEventTap)
    appDelegate.toggleIgnore(flag: true)
}

wheelCountがどういうものなのかはよくわかっていません．

#参考
Swiftでマウスとキーボードのイベント制御
Where can I find a list of Mac virtual key codes?