1 files changed, 105 insertions, 0 deletions
diff --git a/mobile/android/base/java/org/mozilla/gecko/widget/RecyclerViewClickSupport.java b/mobile/android/base/java/org/mozilla/gecko/widget/RecyclerViewClickSupport.java
new file mode 100644
index 000000000..a0c6049c5
--- /dev/null
+++ b/mobile/android/base/java/org/mozilla/gecko/widget/RecyclerViewClickSupport.java
@@ -0,0 +1,105 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; 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.widget;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+
+import org.mozilla.gecko.R;
+
+/**
+ * {@link RecyclerViewClickSupport} implementation that will notify an OnClickListener about clicks and long clicks
+ * on items displayed by the RecyclerView.
+ * @see <a href="http://www.littlerobots.nl/blog/Handle-Android-RecyclerView-Clicks/">littlerobots.nl</a>
+ */
+public class RecyclerViewClickSupport {
+    private final RecyclerView mRecyclerView;
+    private OnItemClickListener mOnItemClickListener;
+    private OnItemLongClickListener mOnItemLongClickListener;
+    private View.OnClickListener mOnClickListener = new View.OnClickListener() {
+        @Override
+        public void onClick(View v) {
+            if (mOnItemClickListener != null) {
+                RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
+                mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
+            }
+        }
+    };
+    private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() {
+        @Override
+        public boolean onLongClick(View v) {
+            if (mOnItemLongClickListener != null) {
+                RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
+                return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v);
+            }
+            return false;
+        }
+    };
+    private RecyclerView.OnChildAttachStateChangeListener mAttachListener
+            = new RecyclerView.OnChildAttachStateChangeListener() {
+        @Override
+        public void onChildViewAttachedToWindow(View view) {
+            if (mOnItemClickListener != null) {
+                view.setOnClickListener(mOnClickListener);
+            }
+            if (mOnItemLongClickListener != null) {
+                view.setOnLongClickListener(mOnLongClickListener);
+            }
+        }
+
+        @Override
+        public void onChildViewDetachedFromWindow(View view) {
+
+        }
+    };
+
+    private RecyclerViewClickSupport(RecyclerView recyclerView) {
+        mRecyclerView = recyclerView;
+        mRecyclerView.setTag(R.id.recycler_view_click_support, this);
+        mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
+    }
+
+    public static RecyclerViewClickSupport addTo(RecyclerView view) {
+        RecyclerViewClickSupport support = (RecyclerViewClickSupport) view.getTag(R.id.recycler_view_click_support);
+        if (support == null) {
+            support = new RecyclerViewClickSupport(view);
+        }
+        return support;
+    }
+
+    public static RecyclerViewClickSupport removeFrom(RecyclerView view) {
+        RecyclerViewClickSupport support = (RecyclerViewClickSupport) view.getTag(R.id.recycler_view_click_support);
+        if (support != null) {
+            support.detach(view);
+        }
+        return support;
+    }
+
+    public RecyclerViewClickSupport setOnItemClickListener(OnItemClickListener listener) {
+        mOnItemClickListener = listener;
+        return this;
+    }
+
+    public RecyclerViewClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) {
+        mOnItemLongClickListener = listener;
+        return this;
+    }
+
+    private void detach(RecyclerView view) {
+        view.removeOnChildAttachStateChangeListener(mAttachListener);
+        view.setTag(R.id.recycler_view_click_support, null);
+    }
+
+    public interface OnItemClickListener {
+
+        void onItemClicked(RecyclerView recyclerView, int position, View v);
+    }
+
+    public interface OnItemLongClickListener {
+
+        boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
+    }
+}