Tunnel detail: Refactor out the label scrolling into a separate UI class

Signed-off-by: Roopesh Chander <roop@roopc.net>

1 files changed, 50 insertions, 0 deletions

diff --git a/WireGuard/WireGuard/UI/iOS/ScrollableLabel.swift b/WireGuard/WireGuard/UI/iOS/ScrollableLabel.swift
new file mode 100644
index 0000000..780d6c8
--- /dev/null
+++ b/WireGuard/WireGuard/UI/iOS/ScrollableLabel.swift
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018 WireGuard LLC. All Rights Reserved.
+
+import UIKit
+
+class ScrollableLabel: UIScrollView {
+    var text: String {
+        get { return label.text ?? "" }
+        set(value) { label.text = value }
+    }
+    var textColor: UIColor {
+        get { return label.textColor }
+        set(value) { label.textColor = value }
+    }
+
+    private let label: UILabel
+
+    init() {
+        let label = UILabel()
+        label.translatesAutoresizingMaskIntoConstraints = false
+        label.textAlignment = .right
+        self.label = label
+
+        super.init(frame: CGRect.zero)
+
+        self.isDirectionalLockEnabled = true
+        self.showsHorizontalScrollIndicator = false
+        self.showsVerticalScrollIndicator = false
+
+        addSubview(label)
+        label.translatesAutoresizingMaskIntoConstraints = false
+        NSLayoutConstraint.activate([
+            label.leftAnchor.constraint(equalTo: self.contentLayoutGuide.leftAnchor),
+            label.topAnchor.constraint(equalTo: self.contentLayoutGuide.topAnchor),
+            label.bottomAnchor.constraint(equalTo: self.contentLayoutGuide.bottomAnchor),
+            label.rightAnchor.constraint(equalTo: self.contentLayoutGuide.rightAnchor),
+            label.heightAnchor.constraint(equalTo: self.heightAnchor),
+            ])
+        // If label has less content, it should expand to fit the scrollView,
+        // so that right-alignment works in the label.
+        let expandToFitValueLabelConstraint = NSLayoutConstraint(item: label, attribute: .width, relatedBy: .equal,
+                                                                 toItem: self, attribute: .width, multiplier: 1, constant: 0)
+        expandToFitValueLabelConstraint.priority = .defaultLow + 1
+        expandToFitValueLabelConstraint.isActive = true
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+}