1 files changed, 39 insertions, 0 deletions
diff --git a/mobile/android/base/java/org/mozilla/gecko/icons/preparation/AddDefaultIconUrl.java b/mobile/android/base/java/org/mozilla/gecko/icons/preparation/AddDefaultIconUrl.java
new file mode 100644
index 000000000..5bc7d1c1f
--- /dev/null
+++ b/mobile/android/base/java/org/mozilla/gecko/icons/preparation/AddDefaultIconUrl.java
@@ -0,0 +1,39 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
+ * 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/. */
+
+package org.mozilla.gecko.icons.preparation;
+
+import android.text.TextUtils;
+
+import org.mozilla.gecko.icons.IconDescriptor;
+import org.mozilla.gecko.icons.IconRequest;
+import org.mozilla.gecko.icons.IconsHelper;
+import org.mozilla.gecko.util.StringUtils;
+
+/**
+ * Preparer to add the "default/guessed" favicon URL (domain/favicon.ico) to the list of URLs to
+ * try loading the favicon from.
+ *
+ * The default URL will be added with a very low priority so that we will only try to load from this
+ * URL if all other options failed.
+ */
+public class AddDefaultIconUrl implements Preparer {
+    @Override
+    public void prepare(IconRequest request) {
+        if (!StringUtils.isHttpOrHttps(request.getPageUrl())) {
+            return;
+        }
+
+        final String defaultFaviconUrl = IconsHelper.guessDefaultFaviconURL(request.getPageUrl());
+        if (TextUtils.isEmpty(defaultFaviconUrl)) {
+            // We couldn't generate a default favicon URL for this URL. Nothing to do here.
+            return;
+        }
+
+        request.modify()
+                .icon(IconDescriptor.createGenericIcon(defaultFaviconUrl))
+                .deferBuild();
+    }
+}