NSView+PinLayout.swift

//  Copyright (c) 2018 Luc Dion
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.

import Foundation

#if os(macOS)
import AppKit

extension NSView: Layoutable {
    private struct pinlayoutAssociatedKeys {
        static var pinlayoutIsIncludedInPinLayoutSizeCalculation = UnsafeMutablePointer<Int8>.allocate(capacity: 1)
    }
  
    public typealias PinView = NSView

    public var pin: PinLayout<NSView> {
        return PinLayout(view: self, keepTransform: true)
    }

    public var pinFrame: PinLayout<NSView> {
        return PinLayout(view: self, keepTransform: false)
    }

    @objc public var pinObjc: PinLayoutObjC {
        return PinLayoutObjCImpl(view: self, keepTransform: true)
    }

    public var isIncludedInPinLayoutSizeCalculation: Bool {
        get {
            return objc_getAssociatedObject(self, &pinlayoutAssociatedKeys.pinlayoutIsIncludedInPinLayoutSizeCalculation) as? Bool ?? true
        }
        set {
            objc_setAssociatedObject(self, &pinlayoutAssociatedKeys.pinlayoutIsIncludedInPinLayoutSizeCalculation, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
    }

    public func getRect(keepTransform: Bool) -> CGRect {
        if let superview = superview, !superview.isFlipped {
            var flippedRect = frame
            flippedRect.origin.y = superview.frame.height - flippedRect.height - flippedRect.origin.y
            return flippedRect
        } else {
            return frame
        }
    }

    public func setRect(_ rect: CGRect, keepTransform: Bool) {
        let adjustedRect = Coordinates<PinView>.adjustRectToDisplayScale(rect)

        if let superview = superview, !superview.isFlipped {
            var flippedRect = adjustedRect
            flippedRect.origin.y = superview.frame.height - flippedRect.height - flippedRect.origin.y
            frame = flippedRect
        } else {
            frame = adjustedRect
        }
    }

    public func isLTR() -> Bool {
        switch Pin.layoutDirection {
        case .auto: return self.userInterfaceLayoutDirection == .leftToRight
        case .ltr:  return true
        case .rtl:  return false
        }
    }
}

extension NSControl: SizeCalculable {

}

#endif