Localize also multiline strings

pass/UserInterface/UICodeHighlightingLabel.swift

@@ -0,0 +1,48 @@
+/*
+ UICodeHighlightingLabel.swift
+ pass
+
+ Created by Danny Moesch on 20.01.19.
+ Copyright © 2019 Bob Sun. All rights reserved.
+ */
+
+import UIKit
+import passKit
+
+class UICodeHighlightingLabel: UILocalizedLabel {
+
+    private static let CODE_ATTRIBUTES: [NSAttributedString.Key: Any] = [.font: UIFont(name: "Menlo-Regular", size: 12)!]
+    private static let ATTRIBUTED_NEWLINE = NSAttributedString(string: "\n")
+
+    override func awakeFromNib() {
+        super.awakeFromNib()
+        guard let text = text else {
+            return
+        }
+        attributedText = formatCode(in: text)
+    }
+
+    /// Format code sections in a multiline string block.
+    ///
+    /// A line in the string is interpreted as a code section if it starts with two spaces.
+    ///
+    /// - Parameter text: Multiline string block
+    /// - Returns: Same multiline string block with code sections formatted
+    private func formatCode(in text: String) -> NSMutableAttributedString {
+        let formattedText = text
+            .split(omittingEmptySubsequences: false) {
+                $0 == "\n" || $0 == "\r\n"
+            }.map { line -> NSAttributedString in
+                if line.starts(with: "  ") {
+                    return NSAttributedString(string: String(line), attributes: UICodeHighlightingLabel.CODE_ATTRIBUTES)
+                }
+                return NSAttributedString(string: String(line))
+            }.reduce(into: NSMutableAttributedString(string: "")) {
+                $0.append($1)
+                $0.append(UICodeHighlightingLabel.ATTRIBUTED_NEWLINE)
+            }
+        formattedText.deleteCharacters(in: NSRange(location: formattedText.length - 1, length: 1))
+        return formattedText
+    }
+}
+