Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/lottie-ios/Sources/Public/macOS/AnimationViewBase.macOS.swift

@@ -0,0 +1,102 @@
+//
+//  AnimationViewBase.swift
+//  lottie-swift-iOS
+//
+//  Created by Brandon Withrow on 2/6/19.
+//
+
+#if os(macOS)
+import AppKit
+
+public enum LottieContentMode: Int {
+  case scaleToFill
+  case scaleAspectFit
+  case scaleAspectFill
+  case redraw
+  case center
+  case top
+  case bottom
+  case left
+  case right
+  case topLeft
+  case topRight
+  case bottomLeft
+  case bottomRight
+}
+
+/// The base view for `AnimationView` on macOs.
+///
+/// Enables the `AnimationView` implementation to be shared across platforms.
+public class AnimationViewBase: NSView {
+
+  // MARK: Public
+
+  public override var wantsUpdateLayer: Bool {
+    true
+  }
+
+  public override var isFlipped: Bool {
+    true
+  }
+
+  public var contentMode: LottieContentMode = .scaleAspectFit {
+    didSet {
+      setNeedsLayout()
+    }
+  }
+
+  public override func viewDidMoveToWindow() {
+    super.viewDidMoveToWindow()
+    animationMovedToWindow()
+  }
+
+  public override func layout() {
+    super.layout()
+    CATransaction.begin()
+    CATransaction.setDisableActions(true)
+    layoutAnimation()
+    CATransaction.commit()
+  }
+
+  // MARK: Internal
+
+  var screenScale: CGFloat {
+    NSApp.mainWindow?.backingScaleFactor ?? 1
+  }
+
+  var viewLayer: CALayer? {
+    layer
+  }
+
+  func layoutAnimation() {
+    // Implemented by subclasses.
+  }
+
+  func animationMovedToWindow() {
+    // Implemented by subclasses.
+  }
+
+  func commonInit() {
+    wantsLayer = true
+  }
+
+  func setNeedsLayout() {
+    needsLayout = true
+  }
+
+  func layoutIfNeeded() {
+    // Implemented by subclasses.
+  }
+
+  @objc
+  func animationWillMoveToBackground() {
+    // Implemented by subclasses.
+  }
+
+  @objc
+  func animationWillEnterForeground() {
+    // Implemented by subclasses.
+  }
+
+}
+#endif