Update lottie-ios

submodules/lottie-ios/Sources/Public/DynamicProperties/ValueProviders/SizeValueProvider.swift

@@ -0,0 +1,70 @@
+//
+//  SizeValueProvider.swift
+//  lottie-swift
+//
+//  Created by Brandon Withrow on 2/4/19.
+//
+
+import CoreGraphics
+import Foundation
+
+/// A `ValueProvider` that returns a CGSize Value
+public final class SizeValueProvider: ValueProvider {
+
+  // MARK: Lifecycle
+
+  /// Initializes with a block provider
+  public init(block: @escaping SizeValueBlock) {
+    self.block = block
+    size = .zero
+  }
+
+  /// Initializes with a single size.
+  public init(_ size: CGSize) {
+    self.size = size
+    block = nil
+    hasUpdate = true
+  }
+
+  // MARK: Public
+
+  /// Returns a CGSize for a CGFloat(Frame Time)
+  public typealias SizeValueBlock = (CGFloat) -> CGSize
+
+  public var size: CGSize {
+    didSet {
+      hasUpdate = true
+    }
+  }
+
+  // MARK: ValueProvider Protocol
+
+  public var valueType: Any.Type {
+    Vector3D.self
+  }
+
+  public var storage: ValueProviderStorage<Vector3D> {
+    if let block = block {
+      return .closure { frame in
+        self.hasUpdate = false
+        return block(frame).vector3dValue
+      }
+    } else {
+      hasUpdate = false
+      return .singleValue(size.vector3dValue)
+    }
+  }
+
+  public func hasUpdate(frame _: CGFloat) -> Bool {
+    if block != nil {
+      return true
+    }
+    return hasUpdate
+  }
+
+  // MARK: Private
+
+  private var hasUpdate = true
+
+  private var block: SizeValueBlock?
+}