Best effort dismissal of the login screen.

This change adds in two mechanisms to dismiss the login
screen that shows up on boot. The first is a countdown
timer and the second is a start driving button. Both of
them behave in the same way that once the timer runs out
or if the button is clicked, the system will automatically
try to select a user and get the system running.

Right now the implementation of selecting a user is a bit
trivial, it just tries to drop the keyguard on the currently
running user.

Bug: 36454400
Test: 1. Booted mojave, watched progress bar make progress
         and automatically log in user.
      2. Booted mojave, clicked the start driving button and
         watch the keyguard dismiss itself.
Change-Id: If22f4c3c7e21aadf2951b9c0cd8b97a4b474b349

10 files changed, 207 insertions, 6 deletions

diff --git a/packages/SystemUI/res/drawable/car_progress_bar.xml b/packages/SystemUI/res/drawable/car_progress_bar.xml
new file mode 100644
index 000000000000..742fca7d19fd
--- /dev/null
+++ b/packages/SystemUI/res/drawable/car_progress_bar.xml
@@ -0,0 +1,30 @@
+<!--
+  Copyright (C) 2017 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
+-->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:id="@android:id/background">
+        <shape>
+            <solid android:color="@color/car_user_switcher_progress_bgcolor" />
+        </shape>
+    </item>
+
+    <item android:id="@android:id/progress">
+        <clip>
+            <shape>
+                <solid android:color="@color/car_user_switcher_progress_fgcolor" />
+            </shape>
+        </clip>
+    </item>
+</layer-list>
diff --git a/packages/SystemUI/res/drawable/car_round_button.xml b/packages/SystemUI/res/drawable/car_round_button.xml
new file mode 100644
index 000000000000..5f4deb3e6be3
--- /dev/null
+++ b/packages/SystemUI/res/drawable/car_round_button.xml
@@ -0,0 +1,21 @@
+<!--
+  Copyright (C) 2017 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
+-->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+
+    <solid android:color="@color/car_start_driving_background" />
+    <corners android:radius="@dimen/car_start_driving_corner_radius" />
+</shape>
diff --git a/packages/SystemUI/res/layout/car_fullscreen_user_switcher.xml b/packages/SystemUI/res/layout/car_fullscreen_user_switcher.xml
index a66f767d0ce7..e0438369762c 100644
--- a/packages/SystemUI/res/layout/car_fullscreen_user_switcher.xml
+++ b/packages/SystemUI/res/layout/car_fullscreen_user_switcher.xml
@@ -20,6 +20,14 @@
     android:layout_height="match_parent"
     android:visibility="gone">
 
+    <ProgressBar
+        android:id="@+id/countdown_progress"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/car_user_switcher_progress_bar_height"
+        style="@style/CarUserSwitcher.ProgressBar"
+        android:layout_marginTop="@dimen/car_user_switcher_progress_bar_margin_top"
+        android:layout_alignParentTop="true"/>
+
     <com.android.systemui.statusbar.car.UserGridView
         android:id="@+id/user_grid"
         android:layout_width="match_parent"
@@ -34,4 +42,13 @@
         android:layout_height="@dimen/car_page_indicator_dot_diameter"
         android:layout_marginTop="@dimen/car_page_indicator_margin_top"
         android:layout_below="@+id/user_grid" />
+
+    <Button
+        android:id="@+id/start_driving"
+        android:layout_width="wrap_content"
+        android:layout_height="@dimen/car_start_driving_height"
+        android:text="@string/start_driving"
+        style="@style/CarUserSwitcher.StartDrivingButton"
+        android:layout_alignParentBottom="true"
+        android:layout_centerHorizontal="true" />
 </RelativeLayout>
diff --git a/packages/SystemUI/res/values/colors_car.xml b/packages/SystemUI/res/values/colors_car.xml
new file mode 100644
index 000000000000..4faf252817ee
--- /dev/null
+++ b/packages/SystemUI/res/values/colors_car.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+ * Copyright 2017, 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.
+ */
+-->
+<resources>
+    <color name="car_user_switcher_progress_bgcolor">#00000000</color> <!-- Transparent -->
+    <color name="car_user_switcher_progress_fgcolor">#80CBC4</color> <!-- Teal 200 -->
+    <color name="car_start_driving_background">#FAFAFA</color> <!-- Grey 50 -->
+    <color name="car_start_driving_text">#212121</color> <!-- Grey 900 -->
+</resources>
diff --git a/packages/SystemUI/res/values/dimens_car.xml b/packages/SystemUI/res/values/dimens_car.xml
index a0be999e5b1d..d5d4e10d12ae 100644
--- a/packages/SystemUI/res/values/dimens_car.xml
+++ b/packages/SystemUI/res/values/dimens_car.xml
@@ -22,11 +22,18 @@
     <dimen name="car_fullscreen_user_pod_margin_above_text">24dp</dimen>
     <dimen name="car_fullscreen_user_pod_image_avatar_width">192dp</dimen>
     <dimen name="car_fullscreen_user_pod_image_avatar_height">192dp</dimen>
-    <dimen name="car_fullscreen_user_pod_text_size">40sp</dimen>
+    <dimen name="car_fullscreen_user_pod_text_size">40sp</dimen> <!-- B1 -->
 
     <dimen name="car_navigation_button_width">64dp</dimen>
     <dimen name="car_navigation_bar_width">760dp</dimen>
 
     <dimen name="car_page_indicator_dot_diameter">12dp</dimen>
     <dimen name="car_page_indicator_margin_top">32dp</dimen>
+
+    <dimen name="car_user_switcher_progress_bar_height">6dp</dimen>
+    <dimen name="car_user_switcher_progress_bar_margin_top">@dimen/status_bar_height</dimen>
+    <dimen name="car_start_driving_corner_radius">16dp</dimen>
+    <dimen name="car_start_driving_padding_side">30dp</dimen>
+    <dimen name="car_start_driving_height">80dp</dimen>
+    <dimen name="car_start_driving_text_size">32sp</dimen> <!-- B2 -->
 </resources>
diff --git a/packages/SystemUI/res/values/integers_car.xml b/packages/SystemUI/res/values/integers_car.xml
new file mode 100644
index 000000000000..320ee9f66c79
--- /dev/null
+++ b/packages/SystemUI/res/values/integers_car.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (c) 2017, 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.
+-->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <integer name="car_user_switcher_timeout_ms">15000</integer>
+    <!-- This values less than ProgressBar.PROGRESS_ANIM_DURATION for a smooth animation. -->
+    <integer name="car_user_switcher_anim_update_ms">60</integer>
+</resources>
diff --git a/packages/SystemUI/res/values/strings_car.xml b/packages/SystemUI/res/values/strings_car.xml
index e3f329a085e8..658eb4fb3a8c 100644
--- a/packages/SystemUI/res/values/strings_car.xml
+++ b/packages/SystemUI/res/values/strings_car.xml
@@ -18,4 +18,5 @@
 -->
 <resources>
     <string name="unknown_user_label">Unknown</string>
+    <string name="start_driving">Start Driving</string>
 </resources>
diff --git a/packages/SystemUI/res/values/styles_car.xml b/packages/SystemUI/res/values/styles_car.xml
new file mode 100644
index 000000000000..c66792ca6a15
--- /dev/null
+++ b/packages/SystemUI/res/values/styles_car.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (c) 2017, 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.
+-->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <style name="CarUserSwitcher.ProgressBar" parent="@android:style/Widget.ProgressBar.Horizontal">
+        <item name="android:progressDrawable">@drawable/car_progress_bar</item>
+        <item name="android:min">0</item>
+        <item name="android:max">@integer/car_user_switcher_timeout_ms</item>
+        <item name="android:progress">0</item>
+        <item name="android:interpolator">@android:anim/linear_interpolator</item>
+    </style>
+
+    <style name="CarUserSwitcher.StartDrivingButton" parent="@android:style/Widget.Material.Button">
+        <item name="android:background">@drawable/car_round_button</item>
+        <item name="android:textSize">@dimen/car_start_driving_text_size</item>
+        <item name="android:textColor">@color/car_start_driving_text</item>
+        <item name="android:paddingLeft">@dimen/car_start_driving_padding_side</item>
+        <item name="android:paddingRight">@dimen/car_start_driving_padding_side</item>
+    </style>
+</resources>
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/car/FullscreenUserSwitcher.java b/packages/SystemUI/src/com/android/systemui/statusbar/car/FullscreenUserSwitcher.java
index bcad78706a0a..d84a731e232e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/car/FullscreenUserSwitcher.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/car/FullscreenUserSwitcher.java
@@ -16,8 +16,11 @@
 
 package com.android.systemui.statusbar.car;
 
+import android.content.res.Resources;
+import android.os.CountDownTimer;
 import android.view.View;
 import android.view.ViewStub;
+import android.widget.ProgressBar;
 
 import com.android.systemui.R;
 import com.android.systemui.statusbar.phone.StatusBar;
@@ -27,10 +30,14 @@ import com.android.systemui.statusbar.policy.UserSwitcherController;
  * Manages the fullscreen user switcher.
  */
 public class FullscreenUserSwitcher {
+    private final View mContainer;
+    private final UserGridView mUserGridView;
+    private final UserSwitcherController mUserSwitcherController;
+    private final ProgressBar mProgressBar;
+    private final int mLoginTimeoutMs;
+    private final int mAnimUpdateIntervalMs;
 
-    private View mContainer;
-    private UserGridView mUserGridView;
-    private UserSwitcherController mUserSwitcherController;
+    private CountDownTimer mTimer;
 
     public FullscreenUserSwitcher(StatusBar statusBar,
             UserSwitcherController userSwitcherController,
@@ -42,6 +49,16 @@ public class FullscreenUserSwitcher {
 
         PageIndicator pageIndicator = mContainer.findViewById(R.id.user_switcher_page_indicator);
         pageIndicator.setupWithViewPager(mUserGridView);
+
+        mProgressBar = mContainer.findViewById(R.id.countdown_progress);
+        Resources res = mContainer.getResources();
+        mLoginTimeoutMs = res.getInteger(R.integer.car_user_switcher_timeout_ms);
+        mAnimUpdateIntervalMs = res.getInteger(R.integer.car_user_switcher_anim_update_ms);
+
+        mContainer.findViewById(R.id.start_driving).setOnClickListener(v -> {
+            cancelTimer();
+            automaticallySelectUser();
+        });
     }
 
     public void onUserSwitched(int newUserId) {
@@ -50,10 +67,38 @@ public class FullscreenUserSwitcher {
 
     public void show() {
         mContainer.setVisibility(View.VISIBLE);
+        cancelTimer();
+        mTimer = new CountDownTimer(mLoginTimeoutMs, mAnimUpdateIntervalMs) {
+            @Override
+            public void onTick(long msUntilFinished) {
+                int elapsed = mLoginTimeoutMs - (int) msUntilFinished;
+                mProgressBar.setProgress((int) elapsed, true /* animate */);
+            }
+
+            @Override
+            public void onFinish() {
+                mProgressBar.setProgress(mLoginTimeoutMs, true /* animate */);
+                automaticallySelectUser();
+            }
+        };
+        mTimer.start();
     }
 
     public void hide() {
+        cancelTimer();
         mContainer.setVisibility(View.GONE);
     }
-}
 
+    private void cancelTimer() {
+        if (mTimer != null) {
+            mTimer.cancel();
+            mTimer = null;
+        }
+    }
+
+    private void automaticallySelectUser() {
+        // TODO: Switch according to some policy. This implementation just tries to drop the
+        //       keyguard for the current user.
+        mUserGridView.showOfflineAuthUi();
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/car/UserGridView.java b/packages/SystemUI/src/com/android/systemui/statusbar/car/UserGridView.java
index 972dc3708f90..46f55eeaae8f 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/car/UserGridView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/car/UserGridView.java
@@ -70,7 +70,7 @@ public class UserGridView extends ViewPager {
         mPendingUserId = UserHandle.USER_NULL;
     }
 
-    private void showOfflineAuthUi() {
+    void showOfflineAuthUi() {
         // TODO: Show keyguard UI in-place.
         mStatusBar.executeRunnableDismissingKeyguard(null, null, true, true, true);
     }