Dactyloidae iOS initial commit

mobile/ios/Client/Frontend/Browser/SimpleToast.swift

@@ -0,0 +1,73 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import Foundation
+import Shared
+
+struct SimpleToastUX {
+    static let ToastHeight = BottomToolbarHeight
+    static let ToastAnimationDuration = 0.5
+    static let ToastDefaultColor = UIColor(red: 10 / 255, green: 132 / 255, blue: 255.0 / 255, alpha: 1)
+    static let ToastFont = UIFont.systemFont(ofSize: 15)
+    static let ToastDismissAfter = DispatchTimeInterval.milliseconds(4500) // 4.5 seconds.
+    static let ToastDelayBefore = DispatchTimeInterval.milliseconds(0) // 0 seconds
+    static let BottomToolbarHeight = CGFloat(45)
+}
+
+struct SimpleToast {
+
+    func showAlertWithText(_ text: String, bottomContainer: UIView) {
+        let toast = self.createView()
+        toast.text = text
+        bottomContainer.addSubview(toast)
+        toast.snp.makeConstraints { (make) in
+            make.width.equalTo(bottomContainer)
+            make.left.equalTo(bottomContainer)
+            make.height.equalTo(SimpleToastUX.ToastHeight)
+            make.bottom.equalTo(bottomContainer)
+        }
+        animate(toast)
+    }
+
+    fileprivate func createView() -> UILabel {
+        let toast = UILabel()
+        toast.textColor = UIColor.white
+        toast.backgroundColor = SimpleToastUX.ToastDefaultColor
+        toast.font = SimpleToastUX.ToastFont
+        toast.textAlignment = .center
+        return toast
+    }
+
+    fileprivate func dismiss(_ toast: UIView) {
+        UIView.animate(withDuration: SimpleToastUX.ToastAnimationDuration,
+            animations: {
+                var frame = toast.frame
+                frame.origin.y = frame.origin.y + SimpleToastUX.ToastHeight
+                frame.size.height = 0
+                toast.frame = frame
+            },
+            completion: { finished in
+                toast.removeFromSuperview()
+            }
+        )
+    }
+
+    fileprivate func animate(_ toast: UIView) {
+        UIView.animate(withDuration: SimpleToastUX.ToastAnimationDuration,
+            animations: {
+                var frame = toast.frame
+                frame.origin.y = frame.origin.y - SimpleToastUX.ToastHeight
+                frame.size.height = SimpleToastUX.ToastHeight
+                toast.frame = frame
+            },
+            completion: { finished in
+                let dispatchTime = DispatchTime.now() + SimpleToastUX.ToastDismissAfter
+
+                DispatchQueue.main.asyncAfter(deadline: dispatchTime, execute: {
+                    self.dismiss(toast)
+                })
+            }
+        )
+    }
+}