Allow a settings override for double-line clock

This setting allows users to always show a single-line format clock,
regardless of notification status.

Fixes: 194905512
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.display
Change-Id: I94ade1b2d968e5783750e7a98a9a5d28cc22b659

res/values/strings.xml

@@ -13337,6 +13337,10 @@
     <string name="lockscreen_privacy_controls_setting_toggle">Show device controls</string>
     <!-- Device controls summary [CHAR LIMIT=NONE] -->
     <string name="lockscreen_privacy_controls_summary">Access controls when locked</string>
+    <!-- Lockscreen double-line clock summary [CHAR LIMIT=NONE] -->
+    <string name="lockscreen_double_line_clock_summary">Show double-line clock when available</string>
+    <!-- Lockscreen double-line clock toggle [CHAR LIMIT=60] -->
+    <string name="lockscreen_double_line_clock_setting_toggle">Double-line clock</string>
 
     <!-- Title for RTT setting. [CHAR LIMIT=NONE] -->
     <string name="rtt_settings_title"></string>

res/xml/security_lockscreen_settings.xml

@@ -62,6 +62,12 @@
             android:title="@string/lockscreen_privacy_controls_setting_toggle"
             android:summary="@string/lockscreen_privacy_controls_summary"
             settings:controller="com.android.settings.display.ControlsPrivacyPreferenceController" />
+
+        <SwitchPreference
+            android:key="lockscreen_double_line_clock_switch"
+            android:title="@string/lockscreen_double_line_clock_setting_toggle"
+            android:summary="@string/lockscreen_double_line_clock_summary"
+            settings:controller="com.android.settings.display.LockscreenClockPreferenceController" />
     </PreferenceCategory>
 
     <PreferenceCategory

src/com/android/settings/display/LockscreenClockPreferenceController.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2021 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.settings.display;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+
+import com.android.settings.R;
+import com.android.settings.core.TogglePreferenceController;
+
+/**
+ * Preference to enable/disable the large double-line clock on lockscreen
+ */
+public class LockscreenClockPreferenceController extends TogglePreferenceController {
+
+    private static final String SETTING_KEY = Settings.Secure.LOCKSCREEN_USE_DOUBLE_LINE_CLOCK;
+
+    public LockscreenClockPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.Secure.getInt(mContext.getContentResolver(), SETTING_KEY, 1) != 0;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        return Settings.Secure.putInt(mContext.getContentResolver(), SETTING_KEY,
+                isChecked ? 1 : 0);
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return mContext.getText(R.string.lockscreen_double_line_clock_summary);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        preference.setEnabled(true);
+        refreshSummary(preference);
+    }
+
+    @Override
+    public int getSliceHighlightMenuRes() {
+        return R.string.menu_key_display;
+    }
+}

tests/robotests/src/com/android/settings/display/LockscreenClockPreferenceControllerTest.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2021 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.settings.display;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class LockscreenClockPreferenceControllerTest {
+
+    private static final String TEST_KEY = "test_key";
+    private static final String SETTING_KEY = Settings.Secure.LOCKSCREEN_USE_DOUBLE_LINE_CLOCK;
+
+    private Context mContext;
+    private ContentResolver mContentResolver;
+    private LockscreenClockPreferenceController mController;
+
+    @Mock
+    private Preference mPreference;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mContext = RuntimeEnvironment.application;
+        mContentResolver = mContext.getContentResolver();
+        mController = new LockscreenClockPreferenceController(mContext, TEST_KEY);
+    }
+
+    @Test
+    public void isChecked_SettingIs1_returnTrue() {
+        Settings.Secure.putInt(mContentResolver, SETTING_KEY, 1);
+
+        assertThat(mController.isChecked()).isTrue();
+    }
+
+    @Test
+    public void isChecked_SettingIs0_returnFalse() {
+        Settings.Secure.putInt(mContentResolver, SETTING_KEY, 0);
+
+        assertThat(mController.isChecked()).isFalse();
+    }
+
+    @Test
+    public void isChecked_SettingIsNotSet_returnTrue() {
+        Settings.Secure.putString(mContentResolver, SETTING_KEY, null);
+
+        assertThat(mController.isChecked()).isTrue();
+    }
+
+    @Test
+    public void setChecked_true_SettingIsNot0() {
+        mController.setChecked(true);
+
+        assertThat(Settings.Secure.getInt(mContentResolver, SETTING_KEY, 0)).isNotEqualTo(0);
+    }
+
+    @Test
+    public void setChecked_false_SettingIs0() {
+        mController.setChecked(false);
+
+        assertThat(Settings.Secure.getInt(mContentResolver, SETTING_KEY, 0)).isEqualTo(0);
+    }
+}