Cleanup to screensaver settings for O

Reworked the way screensaver settings are laid out for O. Instead of
using the options menu and dialogs to navigate screensaver options,
there are now two rows: one row for the screensaver choice and
optionally its own settings, and one row for the "when to show" setting.
And now there's a nice obvious button you can press to preview your
choices.

Test: 'export ROBOTEST_FILTER="RadioButtonListFragmentTest";\
mmm -j20 packages/apps/Settings/tests/robotests'

Bug: 35031991
Change-Id: Ie7d2055fb45f6dfe72e34cb9598d9a25f7bee75a

src/com/android/settings/dream/CurrentDreamPicker.java

@@ -0,0 +1,117 @@
+/*
+ * 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.settings.dream;
+
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.widget.RadioButtonPickerFragment;
+import com.android.settingslib.dream.DreamBackend;
+import com.android.settingslib.dream.DreamBackend.DreamInfo;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public final class CurrentDreamPicker extends RadioButtonPickerFragment {
+
+    private DreamBackend mBackend;
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+
+        mBackend = DreamBackend.getInstance(context);
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsProto.MetricsEvent.DREAM;
+    }
+
+    @Override
+    protected boolean setDefaultKey(String key) {
+        Map<String, ComponentName> componentNameMap = getDreamComponentsMap();
+        if (componentNameMap.get(key) != null) {
+            mBackend.setActiveDream(componentNameMap.get(key));
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    protected String getDefaultKey() {
+        return mBackend.getActiveDream().flattenToString();
+    }
+
+    @Override
+    protected List<? extends CandidateInfo> getCandidates() {
+        final List<DreamCandidateInfo> candidates;
+        candidates = mBackend.getDreamInfos().stream()
+                .map(DreamCandidateInfo::new)
+                .collect(Collectors.toList());
+
+        return candidates;
+    }
+
+    @Override
+    protected void onSelectionPerformed(boolean success) {
+        super.onSelectionPerformed(success);
+
+        getActivity().finish();
+    }
+
+    private Map<String, ComponentName> getDreamComponentsMap() {
+        Map<String, ComponentName> comps = new HashMap<>();
+        mBackend.getDreamInfos()
+                .forEach((info) ->
+                        comps.put(info.componentName.flattenToString(), info.componentName));
+
+        return comps;
+    }
+
+    private static final class DreamCandidateInfo extends CandidateInfo {
+        private final CharSequence name;
+        private final Drawable icon;
+        private final String key;
+
+        DreamCandidateInfo(DreamInfo info) {
+            super(true);
+
+            name = info.caption;
+            icon = info.icon;
+            key = info.componentName.flattenToString();
+        }
+
+        @Override
+        public CharSequence loadLabel() {
+            return name;
+        }
+
+        @Override
+        public Drawable loadIcon() {
+            return icon;
+        }
+
+        @Override
+        public String getKey() {
+            return key;
+        }
+    }
+}

src/com/android/settings/dream/CurrentDreamPreferenceController.java

@@ -0,0 +1,79 @@
+/*
+ * 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.settings.dream;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import com.android.settings.core.PreferenceController;
+import com.android.settings.widget.GearPreference;
+import com.android.settingslib.dream.DreamBackend;
+import com.android.settingslib.dream.DreamBackend.DreamInfo;
+import java.util.Optional;
+
+public class CurrentDreamPreferenceController extends PreferenceController {
+    private final DreamBackend mBackend;
+    private final static String TAG = "CurrentDreamPreferenceController";
+    private final static String CURRENT_SCREENSAVER = "current_screensaver";
+
+    public CurrentDreamPreferenceController(Context context) {
+        super(context);
+        mBackend = DreamBackend.getInstance(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return mBackend.getDreamInfos().size() > 0;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return CURRENT_SCREENSAVER;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+
+        preference.setSummary(mBackend.getActiveDreamName());
+        setGearClickListenerForPreference(preference);
+    }
+
+    private void setGearClickListenerForPreference(Preference preference) {
+        if (!(preference instanceof GearPreference)) return;
+
+        GearPreference gearPreference = (GearPreference)preference;
+        Optional<DreamInfo> info = getActiveDreamInfo();
+        if (!info.isPresent() || info.get().settingsComponentName == null) {
+            gearPreference.setOnGearClickListener(null);
+            return;
+        }
+        gearPreference.setOnGearClickListener(gearPref -> launchScreenSaverSettings());
+    }
+
+    private void launchScreenSaverSettings() {
+        Optional<DreamInfo> info = getActiveDreamInfo();
+        if (!info.isPresent()) return;
+        mBackend.launchSettings(info.get());
+    }
+
+    private Optional<DreamInfo> getActiveDreamInfo() {
+        return mBackend.getDreamInfos()
+                .stream()
+                .filter((info) -> info.isActive)
+                .findFirst();
+    }
+}

src/com/android/settings/dream/DreamSettings.java

@@ -0,0 +1,147 @@
+/*
+ * 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.settings.dream;
+
+import android.provider.SearchIndexableResource;
+import android.support.annotation.VisibleForTesting;
+import com.android.settings.R;
+import com.android.settings.core.PreferenceController;
+import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.search.BaseSearchIndexProvider;
+import com.android.settingslib.dream.DreamBackend;
+import com.android.settingslib.dream.DreamBackend.WhenToDream;
+import java.util.ArrayList;
+import android.content.Context;
+import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
+import java.util.Arrays;
+import java.util.List;
+
+import static com.android.settingslib.dream.DreamBackend.EITHER;
+import static com.android.settingslib.dream.DreamBackend.NEVER;
+import static com.android.settingslib.dream.DreamBackend.WHILE_CHARGING;
+import static com.android.settingslib.dream.DreamBackend.WHILE_DOCKED;
+
+public class DreamSettings extends DashboardFragment {
+
+    private static final String TAG = "DreamSettings";
+    static final String WHILE_CHARGING_ONLY = "while_charging_only";
+    static final String WHILE_DOCKED_ONLY = "while_docked_only";
+    static final String EITHER_CHARGING_OR_DOCKED = "either_charging_or_docked";
+    static final String NEVER_DREAM = "never";
+
+    @WhenToDream
+    static int getSettingFromPrefKey(String key) {
+        switch (key) {
+            case WHILE_CHARGING_ONLY:
+                return WHILE_CHARGING;
+            case WHILE_DOCKED_ONLY:
+                return WHILE_DOCKED;
+            case EITHER_CHARGING_OR_DOCKED:
+                return EITHER;
+            case NEVER_DREAM:
+            default:
+                return NEVER;
+        }
+    }
+
+    static String getKeyFromSetting(@WhenToDream int dreamSetting) {
+        switch (dreamSetting) {
+            case WHILE_CHARGING:
+                return WHILE_CHARGING_ONLY;
+            case WHILE_DOCKED:
+                return WHILE_DOCKED_ONLY;
+            case EITHER:
+                return EITHER_CHARGING_OR_DOCKED;
+            case NEVER:
+            default:
+                return NEVER_DREAM;
+        }
+    }
+
+    static int getDreamSettingDescriptionResId(@WhenToDream int dreamSetting) {
+        switch (dreamSetting) {
+            case WHILE_CHARGING:
+                return R.string.screensaver_settings_summary_sleep;
+            case WHILE_DOCKED:
+                return R.string.screensaver_settings_summary_dock;
+            case EITHER:
+                return R.string.screensaver_settings_summary_either_long;
+            case NEVER:
+            default:
+                return R.string.screensaver_settings_summary_never;
+        }
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsEvent.DREAM;
+    }
+
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.dream_fragment_overview;
+    }
+
+    @Override
+    protected String getLogTag() {
+        return TAG;
+    }
+
+    @Override
+    protected List<PreferenceController> getPreferenceControllers(Context context) {
+        return buildPreferenceControllers(context);
+    }
+
+    public static CharSequence getSummaryTextWithDreamName(Context context) {
+        DreamBackend backend = DreamBackend.getInstance(context);
+        return getSummaryTextFromBackend(backend, context);
+    }
+
+    @VisibleForTesting
+    static CharSequence getSummaryTextFromBackend(DreamBackend backend, Context context) {
+        if (!backend.isEnabled()) {
+            return context.getString(R.string.screensaver_settings_summary_off);
+        } else {
+            return backend.getActiveDreamName();
+        }
+    }
+
+    private static List<PreferenceController> buildPreferenceControllers(Context context) {
+        List<PreferenceController> controllers = new ArrayList<>();
+        controllers.add(new CurrentDreamPreferenceController(context));
+        controllers.add(new WhenToDreamPreferenceController(context));
+        controllers.add(new StartNowPreferenceController(context));
+        return controllers;
+    }
+
+    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER
+            = new BaseSearchIndexProvider() {
+                @Override
+                public List<SearchIndexableResource> getXmlResourcesToIndex(
+                        Context context, boolean enabled) {
+                    final SearchIndexableResource sir = new SearchIndexableResource(context);
+                    sir.xmlResId = R.xml.dream_fragment_overview;
+                    return Arrays.asList(sir);
+                }
+
+                @Override
+                public List<PreferenceController> getPreferenceControllers(Context context) {
+                    return buildPreferenceControllers(context);
+                }
+            };
+}
+

src/com/android/settings/dream/StartNowPreferenceController.java

@@ -0,0 +1,66 @@
+/*
+ * 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.settings.dream;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.widget.Button;
+import com.android.settings.R;
+import com.android.settings.applications.LayoutPreference;
+import com.android.settings.core.PreferenceController;
+import com.android.settingslib.dream.DreamBackend;
+
+public class StartNowPreferenceController extends PreferenceController {
+    private static final String TAG = "StartNowPreferenceController";
+    private static final String PREF_KEY = "dream_start_now_button_container";
+    private final DreamBackend mBackend;
+
+    public StartNowPreferenceController(Context context) {
+        super(context);
+
+        mBackend = DreamBackend.getInstance(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREF_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        LayoutPreference pref = (LayoutPreference) screen.findPreference(getPreferenceKey());
+        Button startButton = (Button)pref.findViewById(R.id.dream_start_now_button);
+        startButton.setOnClickListener(v -> mBackend.startDreaming());
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+
+        Button startButton = (Button)((LayoutPreference)preference)
+                .findViewById(R.id.dream_start_now_button);
+        startButton.setEnabled(mBackend.getWhenToDreamSetting() != DreamBackend.NEVER);
+    }
+}

src/com/android/settings/dream/WhenToDreamPicker.java

@@ -0,0 +1,115 @@
+/*
+ * 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.settings.dream;
+
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.widget.RadioButtonPickerFragment;
+import com.android.settingslib.dream.DreamBackend;
+import java.util.ArrayList;
+import java.util.List;
+
+public class WhenToDreamPicker extends RadioButtonPickerFragment {
+
+    private static final String TAG = "WhenToDreamPicker";
+    private DreamBackend mBackend;
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+
+        mBackend = DreamBackend.getInstance(context);
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsProto.MetricsEvent.DREAM;
+    }
+
+    @Override
+    protected List<? extends CandidateInfo> getCandidates() {
+        final String[] entries = entries();
+        final String[] values = keys();
+        final List<WhenToDreamCandidateInfo> candidates = new ArrayList<>();
+
+        if (entries == null || entries.length <= 0) return null;
+        if (values == null || values.length != entries.length) {
+            throw new IllegalArgumentException("Entries and values must be of the same length.");
+        }
+
+        for (int i = 0; i < entries.length; i++) {
+            candidates.add(new WhenToDreamCandidateInfo(entries[i], values[i]));
+        }
+
+        return candidates;
+    }
+
+    private String[] entries() {
+        return getResources().getStringArray(R.array.when_to_start_screensaver_entries);
+    }
+
+    private String[] keys() {
+        return getResources().getStringArray(R.array.when_to_start_screensaver_values);
+    }
+
+    @Override
+    protected String getDefaultKey() {
+        return DreamSettings.getKeyFromSetting(mBackend.getWhenToDreamSetting());
+    }
+
+    @Override
+    protected boolean setDefaultKey(String key) {
+        mBackend.setWhenToDream(DreamSettings.getSettingFromPrefKey(key));
+        return true;
+    }
+
+    @Override
+    protected void onSelectionPerformed(boolean success) {
+        super.onSelectionPerformed(success);
+
+        getActivity().finish();
+    }
+
+    private final class WhenToDreamCandidateInfo extends CandidateInfo {
+        private final String name;
+        private final String key;
+
+        WhenToDreamCandidateInfo(String title, String value) {
+            super(true);
+
+            name = title;
+            key = value;
+        }
+
+        @Override
+        public CharSequence loadLabel() {
+            return name;
+        }
+
+        @Override
+        public Drawable loadIcon() {
+            return null;
+        }
+
+        @Override
+        public String getKey() {
+            return key;
+        }
+    }
+}

src/com/android/settings/dream/WhenToDreamPreferenceController.java

@@ -0,0 +1,52 @@
+/*
+ * 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.settings.dream;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import com.android.settings.core.PreferenceController;
+import com.android.settingslib.dream.DreamBackend;
+
+public class WhenToDreamPreferenceController extends PreferenceController {
+
+    private static final String WHEN_TO_START = "when_to_start";
+    private final DreamBackend mBackend;
+
+    WhenToDreamPreferenceController(Context context) {
+        super(context);
+
+        mBackend = DreamBackend.getInstance(context);
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+
+        int resId = DreamSettings.getDreamSettingDescriptionResId(mBackend.getWhenToDreamSetting());
+        preference.setSummary(preference.getContext().getString(resId));
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return WHEN_TO_START;
+    }
+}