Dactyloidae iOS initial commit

mobile/ios/Client/Frontend/Reader/ReadabilityTabHelper.swift

@@ -0,0 +1,39 @@
+/* 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 WebKit
+
+protocol ReadabilityTabHelperDelegate {
+    func readabilityTabHelper(_ readabilityTabHelper: ReadabilityTabHelper, didFinishWithReadabilityResult result: ReadabilityResult)
+}
+
+class ReadabilityTabHelper: TabContentScript {
+    var delegate: ReadabilityTabHelperDelegate?
+
+    class func name() -> String {
+        return "ReadabilityTabHelper"
+    }
+
+    init?(tab: Tab) {
+        if let readabilityPath = Bundle.main.path(forResource: "Readability", ofType: "js"),
+           let readabilitySource = try? NSMutableString(contentsOfFile: readabilityPath, encoding: String.Encoding.utf8.rawValue),
+           let readabilityTabHelperPath = Bundle.main.path(forResource: ReadabilityTabHelper.name(), ofType: "js"),
+           let readabilityTabHelperSource = try? NSMutableString(contentsOfFile: readabilityTabHelperPath, encoding: String.Encoding.utf8.rawValue) {
+            readabilityTabHelperSource.replaceOccurrences(of: "%READABILITYJS%", with: readabilitySource as String, options: NSString.CompareOptions.literal, range: NSRange(location: 0, length: readabilityTabHelperSource.length))
+            let userScript = WKUserScript(source: readabilityTabHelperSource as String, injectionTime: WKUserScriptInjectionTime.atDocumentEnd, forMainFrameOnly: true)
+            tab.webView!.configuration.userContentController.addUserScript(userScript)
+        }
+    }
+
+    func scriptMessageHandlerName() -> String? {
+        return "readabilityMessageHandler"
+    }
+
+    func userContentController(_ userContentController: WKUserContentController, didReceiveScriptMessage message: WKScriptMessage) {
+        if let readabilityResult = ReadabilityResult(object: message.body as AnyObject?) {
+            delegate?.readabilityTabHelper(self, didFinishWithReadabilityResult: readabilityResult)
+        }
+   }
+}