Add night display pref controllers and change UX

- Convert NightDisplaySettings to a DashboardFragment
- Add preference controllers for all Night Display settings
- Change UX for activation from a toggle to a button

Bug: 73739388
Bug: 69912911
Test: make -j100 and make RunSettingsRoboTests -j100
Change-Id: Ia173f16207ba59bf57eb7546cbb1e2dbca67b063

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

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2018 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 com.android.internal.app.ColorDisplayController;
+import com.android.settings.R;
+
+import java.text.DateFormat;
+import java.time.LocalTime;
+import java.util.Calendar;
+import java.util.TimeZone;
+
+public class NightDisplayTimeFormatter {
+
+    private DateFormat mTimeFormatter;
+
+    NightDisplayTimeFormatter(Context context) {
+        mTimeFormatter = android.text.format.DateFormat.getTimeFormat(context);
+        mTimeFormatter.setTimeZone(TimeZone.getTimeZone("UTC"));
+    }
+
+    public String getFormattedTimeString(LocalTime localTime) {
+        final Calendar c = Calendar.getInstance();
+        c.setTimeZone(mTimeFormatter.getTimeZone());
+        c.set(Calendar.HOUR_OF_DAY, localTime.getHour());
+        c.set(Calendar.MINUTE, localTime.getMinute());
+        c.set(Calendar.SECOND, 0);
+        c.set(Calendar.MILLISECOND, 0);
+        return mTimeFormatter.format(c.getTime());
+    }
+
+    public String getAutoModeTimeSummary(Context context, ColorDisplayController controller) {
+        final int summaryFormatResId = controller.isActivated() ? R.string.night_display_summary_on
+                : R.string.night_display_summary_off;
+        return context.getString(summaryFormatResId, getAutoModeSummary(context, controller));
+    }
+
+    private String getAutoModeSummary(Context context, ColorDisplayController controller) {
+        final boolean isActivated = controller.isActivated();
+        final int autoMode = controller.getAutoMode();
+        if (autoMode == ColorDisplayController.AUTO_MODE_CUSTOM) {
+            if (isActivated) {
+                return context.getString(R.string.night_display_summary_on_auto_mode_custom,
+                        getFormattedTimeString(controller.getCustomEndTime()));
+            } else {
+                return context.getString(R.string.night_display_summary_off_auto_mode_custom,
+                        getFormattedTimeString(controller.getCustomStartTime()));
+            }
+        } else if (autoMode == ColorDisplayController.AUTO_MODE_TWILIGHT) {
+            return context.getString(isActivated
+                    ? R.string.night_display_summary_on_auto_mode_twilight
+                    : R.string.night_display_summary_off_auto_mode_twilight);
+        } else {
+            return context.getString(isActivated
+                    ? R.string.night_display_summary_on_auto_mode_never
+                    : R.string.night_display_summary_off_auto_mode_never);
+        }
+    }
+}