1 files changed, 125 insertions, 0 deletions
diff --git a/src/com/android/car/messenger/core/ui/base/MessageListBaseFragment.java b/src/com/android/car/messenger/core/ui/base/MessageListBaseFragment.java
new file mode 100644
index 0000000..e585dd1
--- /dev/null
+++ b/src/com/android/car/messenger/core/ui/base/MessageListBaseFragment.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.car.messenger.core.ui.base;
+
+import android.content.Context;
+import android.os.Bundle;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.CallSuper;
+import androidx.annotation.LayoutRes;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.core.content.ContextCompat;
+
+import com.android.car.messenger.R;
+import com.android.car.messenger.core.ui.shared.LoadingFrameLayout;
+import com.android.car.ui.baselayout.Insets;
+import com.android.car.ui.baselayout.InsetsChangedListener;
+import com.android.car.ui.core.CarUi;
+import com.android.car.ui.recyclerview.CarUiRecyclerView;
+import com.android.car.ui.toolbar.Toolbar.State;
+import com.android.car.ui.toolbar.ToolbarController;
+
+/**
+ * Base fragment that inflates a {@link RecyclerView}. It handles the top offset for first row item
+ * so the list can scroll underneath the top bar.
+ */
+public class MessageListBaseFragment extends Fragment implements InsetsChangedListener {
+
+    @NonNull protected LoadingFrameLayout mLoadingFrameLayout;
+    @NonNull private CarUiRecyclerView mRecyclerView;
+    @Nullable protected ToolbarController mToolbar;
+
+    @Override
+    public View onCreateView(
+            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        View view = inflater.inflate(getLayoutResource(), container, false);
+        mLoadingFrameLayout = view.findViewById(R.id.loading_frame_layout);
+        mRecyclerView = view.requireViewById(R.id.list_view);
+        mRecyclerView.setLayoutManager(createLayoutManager());
+        return view;
+    }
+
+    /** Layout resource for this fragment. It must contains a RecyclerView with id list_view. */
+    @LayoutRes
+    protected int getLayoutResource() {
+        return R.layout.loading_list_fragment;
+    }
+
+    /**
+     * Creates the layout manager for the recycler view. Default is a {@link LinearLayoutManager}.
+     * Child inheriting from this fragment can override to create a different layout manager.
+     */
+    @NonNull
+    protected RecyclerView.LayoutManager createLayoutManager() {
+        return new LinearLayoutManager(getContext());
+    }
+
+    /** Returns the {@link RecyclerView} instance. */
+    @NonNull
+    protected CarUiRecyclerView getRecyclerView() {
+        return mRecyclerView;
+    }
+
+    @CallSuper
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        mToolbar = CarUi.getToolbar(requireActivity());
+        // Null check for unit tests to pass
+        if (mToolbar != null) {
+            setupToolbar(mToolbar);
+        }
+        Insets insets = CarUi.getInsets(requireActivity());
+        // Null check for unit tests to pass
+        if (insets != null) {
+            onCarUiInsetsChanged(insets);
+        }
+    }
+
+    /** Customizes the tool bar. Can be overridden in subclasses. */
+    protected void setupToolbar(@NonNull ToolbarController toolbar) {
+        Context context = getContext();
+        if (context == null) {
+            return;
+        }
+        toolbar.setTitle(R.string.app_name);
+        toolbar.setState(getToolbarState());
+        toolbar.setLogo(
+                getToolbarState() == State.HOME
+                        ? ContextCompat.getDrawable(context, context.getApplicationInfo().icon)
+                        : null);
+    }
+
+    @NonNull
+    protected State getToolbarState() {
+        return State.HOME;
+    }
+
+    @Override
+    public void onCarUiInsetsChanged(Insets insets) {
+        int listTopPadding =
+                requireContext().getResources().getDimensionPixelSize(R.dimen.list_top_padding);
+        mRecyclerView.setPadding(0, insets.getTop() + listTopPadding, 0, insets.getBottom());
+    }
+}