Hook up AOD knobs to Settings.Global

This cl creates AlwaysOnDisplayPolicy, which get values for the
following knobs(go/aod-experiments) from Settings.Global:
1. screen_brightness_array
2. dimming_scrim_array
3. prox_screen_off_delay
4. prox_cooldown_trigger
5. prox_cooldown_period

Also update code to make sure AlwaysOnDisplayPolicy is used
everywhere.

Bug: 64899561
Test: runtest -x AlwaysOnDisplayPolicyTest

Change-Id: I2e83ff980771e67177e4964bd83aa68b2bdca65f
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index dc9a26e..f1ba362 100755
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -9330,6 +9330,25 @@
         public static final String ANOMALY_DETECTION_CONSTANTS = "anomaly_detection_constants";
 
         /**
+         * Always on display(AOD) specific settings
+         * This is encoded as a key=value list, separated by commas. Ex:
+         *
+         * "prox_screen_off_delay=10000,screen_brightness_array=0:1:2:3:4"
+         *
+         * The following keys are supported:
+         *
+         * <pre>
+         * screen_brightness_array         (string)
+         * dimming_scrim_array             (string)
+         * prox_screen_off_delay           (long)
+         * prox_cooldown_trigger           (long)
+         * prox_cooldown_period            (long)
+         * </pre>
+         * @hide
+         */
+        public static final String ALWAYS_ON_DISPLAY_CONSTANTS = "always_on_display_constants";
+
+        /**
          * App standby (app idle) specific settings.
          * This is encoded as a key=value list, separated by commas. Ex:
          *
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index e292c9d..30f7c73 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -99,6 +99,7 @@
                     Settings.Global.ALARM_MANAGER_CONSTANTS,
                     Settings.Global.ALLOW_USER_SWITCHING_WHEN_SYSTEM_USER_LOCKED,
                     Settings.Global.ALWAYS_FINISH_ACTIVITIES,
+                    Settings.Global.ALWAYS_ON_DISPLAY_CONSTANTS,
                     Settings.Global.ANIMATOR_DURATION_SCALE,
                     Settings.Global.ANOMALY_DETECTION_CONSTANTS,
                     Settings.Global.APN_DB_UPDATE_CONTENT_URL,
diff --git a/packages/SystemUI/src/com/android/systemui/doze/AlwaysOnDisplayPolicy.java b/packages/SystemUI/src/com/android/systemui/doze/AlwaysOnDisplayPolicy.java
new file mode 100644
index 0000000..d1d1808
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/doze/AlwaysOnDisplayPolicy.java
@@ -0,0 +1,122 @@
+/*
+ * 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
+ */
+
+package com.android.systemui.doze;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.provider.Settings;
+import android.text.format.DateUtils;
+import android.util.KeyValueListParser;
+import android.util.Log;
+
+import com.android.systemui.R;
+
+import java.util.Arrays;
+
+/**
+ * Class to store the policy for AOD, which comes from
+ * {@link android.provider.Settings.Global}
+ */
+public class AlwaysOnDisplayPolicy {
+    public static final String TAG = "AlwaysOnDisplayPolicy";
+
+    static final String KEY_SCREEN_BRIGHTNESS_ARRAY = "screen_brightness_array";
+    static final String KEY_DIMMING_SCRIM_ARRAY = "dimming_scrim_array";
+    static final String KEY_PROX_SCREEN_OFF_DELAY_MS = "prox_screen_off_delay";
+    static final String KEY_PROX_COOLDOWN_TRIGGER_MS = "prox_cooldown_trigger";
+    static final String KEY_PROX_COOLDOWN_PERIOD_MS = "prox_cooldown_period";
+
+    /**
+     * Integer array to map ambient brightness type to real screen brightness.
+     *
+     * @see Settings.Global#ALWAYS_ON_DISPLAY_CONSTANTS
+     * @see #KEY_SCREEN_BRIGHTNESS_ARRAY
+     */
+    public final int[] screenBrightnessArray;
+
+    /**
+     * Integer array to map ambient brightness type to dimming scrim.
+     *
+     * @see Settings.Global#ALWAYS_ON_DISPLAY_CONSTANTS
+     * @see #KEY_DIMMING_SCRIM_ARRAY
+     */
+    public final int[] dimmingScrimArray;
+
+    /**
+     * Delay time(ms) from covering the prox to turning off the screen.
+     *
+     * @see Settings.Global#ALWAYS_ON_DISPLAY_CONSTANTS
+     * @see #KEY_PROX_SCREEN_OFF_DELAY_MS
+     */
+    public final long proxScreenOffDelayMs;
+
+    /**
+     * The threshold time(ms) to trigger the cooldown timer, which will
+     * turn off prox sensor for a period.
+     *
+     * @see Settings.Global#ALWAYS_ON_DISPLAY_CONSTANTS
+     * @see #KEY_PROX_COOLDOWN_TRIGGER_MS
+     */
+    public final long proxCooldownTriggerMs;
+
+    /**
+     * The period(ms) to turning off the prox sensor if
+     * {@link #KEY_PROX_COOLDOWN_TRIGGER_MS} is triggered.
+     *
+     * @see Settings.Global#ALWAYS_ON_DISPLAY_CONSTANTS
+     * @see #KEY_PROX_COOLDOWN_PERIOD_MS
+     */
+    public final long proxCooldownPeriodMs;
+
+    private final KeyValueListParser mParser;
+
+    public AlwaysOnDisplayPolicy(Context context) {
+        final Resources resources = context.getResources();
+        mParser = new KeyValueListParser(',');
+
+        final String value = Settings.Global.getString(context.getContentResolver(),
+                Settings.Global.ALWAYS_ON_DISPLAY_CONSTANTS);
+
+        try {
+            mParser.setString(value);
+        } catch (IllegalArgumentException e) {
+            Log.e(TAG, "Bad AOD constants");
+        }
+
+        proxScreenOffDelayMs = mParser.getLong(KEY_PROX_SCREEN_OFF_DELAY_MS,
+                10 * DateUtils.MINUTE_IN_MILLIS);
+        proxCooldownTriggerMs = mParser.getLong(KEY_PROX_COOLDOWN_TRIGGER_MS,
+                2 * DateUtils.MINUTE_IN_MILLIS);
+        proxCooldownPeriodMs = mParser.getLong(KEY_PROX_COOLDOWN_PERIOD_MS,
+                5 * DateUtils.MINUTE_IN_MILLIS);
+        screenBrightnessArray = parseIntArray(KEY_SCREEN_BRIGHTNESS_ARRAY,
+                resources.getIntArray(R.array.config_doze_brightness_sensor_to_brightness));
+        dimmingScrimArray = parseIntArray(KEY_DIMMING_SCRIM_ARRAY,
+                resources.getIntArray(R.array.config_doze_brightness_sensor_to_scrim_opacity));
+    }
+
+    private int[] parseIntArray(final String key, final int[] defaultArray) {
+        final String value = mParser.getString(key, null);
+        if (value != null) {
+            return Arrays.stream(value.split(":")).map(String::trim).mapToInt(
+                    Integer::parseInt).toArray();
+        } else {
+            return defaultArray;
+        }
+    }
+
+}
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeFactory.java b/packages/SystemUI/src/com/android/systemui/doze/DozeFactory.java
index d374d68..6f8bcff 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeFactory.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeFactory.java
@@ -59,7 +59,7 @@
 
         DozeMachine machine = new DozeMachine(wrappedService, config, wakeLock);
         machine.setParts(new DozeMachine.Part[]{
-                new DozePauser(handler, machine, alarmManager),
+                new DozePauser(handler, machine, alarmManager, new AlwaysOnDisplayPolicy(context)),
                 new DozeFalsingManagerAdapter(FalsingManager.getInstance(context)),
                 createDozeTriggers(context, sensorManager, host, alarmManager, config, params,
                         handler, wakeLock, machine),
@@ -76,7 +76,8 @@
             Handler handler) {
         Sensor sensor = DozeSensors.findSensorWithType(sensorManager,
                 context.getString(R.string.doze_brightness_sensor_type));
-        return new DozeScreenBrightness(context, service, sensorManager, sensor, host, handler);
+        return new DozeScreenBrightness(context, service, sensorManager, sensor, host, handler,
+                new AlwaysOnDisplayPolicy(context));
     }
 
     private DozeTriggers createDozeTriggers(Context context, SensorManager sensorManager,
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozePauser.java b/packages/SystemUI/src/com/android/systemui/doze/DozePauser.java
index a33b454c..76a1902 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozePauser.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozePauser.java
@@ -26,20 +26,22 @@
  */
 public class DozePauser implements DozeMachine.Part {
     public static final String TAG = DozePauser.class.getSimpleName();
-    private static final long TIMEOUT = 10 * 1000;
     private final AlarmTimeout mPauseTimeout;
     private final DozeMachine mMachine;
+    private final long mTimeoutMs;
 
-    public DozePauser(Handler handler, DozeMachine machine, AlarmManager alarmManager) {
+    public DozePauser(Handler handler, DozeMachine machine, AlarmManager alarmManager,
+            AlwaysOnDisplayPolicy policy) {
         mMachine = machine;
         mPauseTimeout = new AlarmTimeout(alarmManager, this::onTimeout, TAG, handler);
+        mTimeoutMs = policy.proxScreenOffDelayMs;
     }
 
     @Override
     public void transitionTo(DozeMachine.State oldState, DozeMachine.State newState) {
         switch (newState) {
             case DOZE_AOD_PAUSING:
-                mPauseTimeout.schedule(TIMEOUT, AlarmTimeout.MODE_IGNORE_IF_SCHEDULED);
+                mPauseTimeout.schedule(mTimeoutMs, AlarmTimeout.MODE_IGNORE_IF_SCHEDULED);
                 break;
             default:
                 mPauseTimeout.cancel();
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeScreenBrightness.java b/packages/SystemUI/src/com/android/systemui/doze/DozeScreenBrightness.java
index 30420529..11b4b0ef 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeScreenBrightness.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeScreenBrightness.java
@@ -42,7 +42,7 @@
 
     public DozeScreenBrightness(Context context, DozeMachine.Service service,
             SensorManager sensorManager, Sensor lightSensor, DozeHost host,
-            Handler handler) {
+            Handler handler, AlwaysOnDisplayPolicy policy) {
         mContext = context;
         mDozeService = service;
         mSensorManager = sensorManager;
@@ -50,10 +50,8 @@
         mDozeHost = host;
         mHandler = handler;
 
-        mSensorToBrightness = context.getResources().getIntArray(
-                R.array.config_doze_brightness_sensor_to_brightness);
-        mSensorToScrimOpacity = context.getResources().getIntArray(
-                R.array.config_doze_brightness_sensor_to_scrim_opacity);
+        mSensorToBrightness = policy.screenBrightnessArray;
+        mSensorToScrimOpacity = policy.dimmingScrimArray;
     }
 
     @Override
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java b/packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java
index 566353c..91cde37 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java
@@ -72,7 +72,7 @@
     public DozeSensors(Context context, AlarmManager alarmManager, SensorManager sensorManager,
             DozeParameters dozeParameters,
             AmbientDisplayConfiguration config, WakeLock wakeLock, Callback callback,
-            Consumer<Boolean> proxCallback) {
+            Consumer<Boolean> proxCallback, AlwaysOnDisplayPolicy policy) {
         mContext = context;
         mAlarmManager = alarmManager;
         mSensorManager = sensorManager;
@@ -112,7 +112,7 @@
                         true /* touchscreen */),
         };
 
-        mProxSensor = new ProxSensor();
+        mProxSensor = new ProxSensor(policy);
         mCallback = callback;
     }
 
@@ -206,17 +206,16 @@
 
     private class ProxSensor implements SensorEventListener {
 
-        static final long COOLDOWN_TRIGGER = 2 * 1000;
-        static final long COOLDOWN_PERIOD = 5 * 1000;
-
         boolean mRequested;
         boolean mRegistered;
         Boolean mCurrentlyFar;
         long mLastNear;
         final AlarmTimeout mCooldownTimer;
+        final AlwaysOnDisplayPolicy mPolicy;
 
 
-        public ProxSensor() {
+        public ProxSensor(AlwaysOnDisplayPolicy policy) {
+            mPolicy = policy;
             mCooldownTimer = new AlarmTimeout(mAlarmManager, this::updateRegistered,
                     "prox_cooldown", mHandler);
         }
@@ -264,11 +263,12 @@
                 // Sensor has been unregistered by the proxCallback. Do nothing.
             } else if (!mCurrentlyFar) {
                 mLastNear = now;
-            } else if (mCurrentlyFar && now - mLastNear < COOLDOWN_TRIGGER) {
+            } else if (mCurrentlyFar && now - mLastNear < mPolicy.proxCooldownTriggerMs) {
                 // If the last near was very recent, we might be using more power for prox
                 // wakeups than we're saving from turning of the screen. Instead, turn it off
                 // for a while.
-                mCooldownTimer.schedule(COOLDOWN_PERIOD, AlarmTimeout.MODE_IGNORE_IF_SCHEDULED);
+                mCooldownTimer.schedule(mPolicy.proxCooldownPeriodMs,
+                        AlarmTimeout.MODE_IGNORE_IF_SCHEDULED);
                 updateRegistered();
             }
         }
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java b/packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java
index 4583160..f7a258a 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java
@@ -84,7 +84,8 @@
         mWakeLock = wakeLock;
         mAllowPulseTriggers = allowPulseTriggers;
         mDozeSensors = new DozeSensors(context, alarmManager, mSensorManager, dozeParameters,
-                config, wakeLock, this::onSensor, this::onProximityFar);
+                config, wakeLock, this::onSensor, this::onProximityFar,
+                new AlwaysOnDisplayPolicy(context));
         mUiModeManager = mContext.getSystemService(UiModeManager.class);
     }
 
diff --git a/packages/SystemUI/tests/Android.mk b/packages/SystemUI/tests/Android.mk
index 5e71dd4..27c16d5 100644
--- a/packages/SystemUI/tests/Android.mk
+++ b/packages/SystemUI/tests/Android.mk
@@ -54,7 +54,8 @@
     SystemUI-proto \
     SystemUI-tags \
     legacy-android-test \
-    testables
+    testables \
+    truth-prebuilt \
 
 LOCAL_JAVA_LIBRARIES := android.test.runner telephony-common android.car
 
diff --git a/packages/SystemUI/tests/src/com/android/systemui/doze/AlwaysOnDisplayPolicyTest.java b/packages/SystemUI/tests/src/com/android/systemui/doze/AlwaysOnDisplayPolicyTest.java
new file mode 100644
index 0000000..abc2d0e
--- /dev/null
+++ b/packages/SystemUI/tests/src/com/android/systemui/doze/AlwaysOnDisplayPolicyTest.java
@@ -0,0 +1,86 @@
+/*
+ * 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.
+ */
+
+package com.android.systemui.doze;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.provider.Settings;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+import android.text.format.DateUtils;
+
+import com.android.systemui.R;
+import com.android.systemui.SysuiTestCase;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class AlwaysOnDisplayPolicyTest extends SysuiTestCase {
+    private static final String ALWAYS_ON_DISPLAY_CONSTANTS_VALUE = "prox_screen_off_delay=1000"
+            + ",prox_cooldown_trigger=2000"
+            + ",prox_cooldown_period=3000"
+            + ",screen_brightness_array=1:2:3:4:5"
+            + ",dimming_scrim_array=5:4:3:2:1";
+
+    private String mPreviousConfig;
+
+    @Before
+    public void setUp() {
+        mPreviousConfig = Settings.Global.getString(mContext.getContentResolver(),
+                Settings.Global.ALWAYS_ON_DISPLAY_CONSTANTS);
+    }
+
+    @After
+    public void tearDown() {
+        Settings.Global.putString(mContext.getContentResolver(),
+                Settings.Global.ALWAYS_ON_DISPLAY_CONSTANTS, mPreviousConfig);
+    }
+
+    @Test
+    public void testPolicy_valueNull_containsDefaultValue() throws Exception {
+        Settings.Global.putString(mContext.getContentResolver(),
+                Settings.Global.ALWAYS_ON_DISPLAY_CONSTANTS, null);
+
+        AlwaysOnDisplayPolicy policy = new AlwaysOnDisplayPolicy(mContext);
+
+        assertThat(policy.proxScreenOffDelayMs).isEqualTo(10 * DateUtils.MINUTE_IN_MILLIS);
+        assertThat(policy.proxCooldownTriggerMs).isEqualTo(2 * DateUtils.MINUTE_IN_MILLIS);
+        assertThat(policy.proxCooldownPeriodMs).isEqualTo(5 * DateUtils.MINUTE_IN_MILLIS);
+        assertThat(policy.screenBrightnessArray).isEqualTo(mContext.getResources().getIntArray(
+                R.array.config_doze_brightness_sensor_to_brightness));
+        assertThat(policy.dimmingScrimArray).isEqualTo(mContext.getResources().getIntArray(
+                R.array.config_doze_brightness_sensor_to_scrim_opacity));
+    }
+
+    @Test
+    public void testPolicy_valueNotNull_containsValue() throws Exception {
+        Settings.Global.putString(mContext.getContentResolver(),
+                Settings.Global.ALWAYS_ON_DISPLAY_CONSTANTS, ALWAYS_ON_DISPLAY_CONSTANTS_VALUE);
+
+        AlwaysOnDisplayPolicy policy = new AlwaysOnDisplayPolicy(mContext);
+
+        assertThat(policy.proxScreenOffDelayMs).isEqualTo(1000);
+        assertThat(policy.proxCooldownTriggerMs).isEqualTo(2000);
+        assertThat(policy.proxCooldownPeriodMs).isEqualTo(3000);
+        assertThat(policy.screenBrightnessArray).isEqualTo(new int[]{1, 2, 3, 4, 5});
+        assertThat(policy.dimmingScrimArray).isEqualTo(new int[]{5, 4, 3, 2, 1});
+    }
+}
diff --git a/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenBrightnessTest.java b/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenBrightnessTest.java
index c275806..46e1d55 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenBrightnessTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenBrightnessTest.java
@@ -60,7 +60,8 @@
         mSensorManager = new FakeSensorManager(mContext);
         mSensor = mSensorManager.getFakeLightSensor();
         mScreen = new DozeScreenBrightness(mContext, mServiceFake, mSensorManager,
-                mSensor.getSensor(), mHostFake, null /* handler */);
+                mSensor.getSensor(), mHostFake, null /* handler */,
+                new AlwaysOnDisplayPolicy(mContext));
     }
 
     @Test
@@ -135,7 +136,8 @@
     @Test
     public void testNullSensor() throws Exception {
         mScreen = new DozeScreenBrightness(mContext, mServiceFake, mSensorManager,
-                null /* sensor */, mHostFake, null /* handler */);
+                null /* sensor */, mHostFake, null /* handler */,
+                new AlwaysOnDisplayPolicy(mContext));
 
         mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
         mScreen.transitionTo(INITIALIZED, DOZE_AOD);