Issue 2801 - Create 'Whitelisted websites' screen and add link to 'Ad blocking' screen

mobile/android/thirdparty/org/adblockplus/browser/UrlUtils.java

Index: mobile/android/thirdparty/org/adblockplus/browser/UrlUtils.java
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new file mode 100644
--- /dev/null
+++ b/mobile/android/thirdparty/org/adblockplus/browser/UrlUtils.java
@@ -0,0 +1,71 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-present eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.adblockplus.browser;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+
+public class UrlUtils
+{
+
+  private static final String SCHEME_HTTP = "http";
+  private static final String SCHEME_SEPARATOR = "://";
+  private static final String WWW_HOST_PART = "www.";
+
+  public static String formatUrl(String urlStr)
+  {
+    if (!urlStr.contains(SCHEME_SEPARATOR))
+    {
+      urlStr = SCHEME_HTTP + SCHEME_SEPARATOR + urlStr;
+    }
+    return urlStr;
+  }
+
+  public static String getHostFromUrl(String urlStr)
+  {
+    try
+    {
+      final URL url = new URL(formatUrl(urlStr));
+      String host = url.getHost();
+      if (host != null)
+      {
+        if (host.startsWith(WWW_HOST_PART))
+        {
+          host = host.substring(WWW_HOST_PART.length());
+        }
+        return host;
+      }
+    }
+    catch (MalformedURLException e)
+    {
+    }
+    return null;
+  }
+
+  public static boolean isSchemeHttpOrHttps(String urlStr)
+  {
+    try
+    {
+      return new URL(urlStr).getProtocol().contains(SCHEME_HTTP);
+    }
+    catch (MalformedURLException e)
+    {
+    }
+    return false;
+  }
+}