Dactyloidae iOS initial commit

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

@@ -0,0 +1,35 @@
+/* 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
+import WebKit
+
+class PrintHelper: TabContentScript {
+    fileprivate weak var tab: Tab?
+
+    class func name() -> String {
+        return "PrintHelper"
+    }
+
+    required init(tab: Tab) {
+        self.tab = tab
+        if let path = Bundle.main.path(forResource: "PrintHelper", ofType: "js"), let source = try? NSString(contentsOfFile: path, encoding: String.Encoding.utf8.rawValue) as String {
+            let userScript = WKUserScript(source: source, injectionTime: WKUserScriptInjectionTime.atDocumentEnd, forMainFrameOnly: false)
+            tab.webView!.configuration.userContentController.addUserScript(userScript)
+        }
+    }
+
+    func scriptMessageHandlerName() -> String? {
+        return "printHandler"
+    }
+
+    func userContentController(_ userContentController: WKUserContentController, didReceiveScriptMessage message: WKScriptMessage) {
+        if let tab = tab, let webView = tab.webView {
+            let printController = UIPrintInteractionController.shared
+            printController.printFormatter = webView.viewPrintFormatter()
+            printController.present(animated: true, completionHandler: nil)
+        }
+    }
+}