Add setting toggle for power menu privacy

Adds a toggle for Secure.POWER_MENU_LOCKED_SHOW_CONTENT.

The toggle is disabled if cards & passes and controls are off or if the
user does not have a secure lock screen.

Test: manual
Test: PowerMenuPrivacyPreferenceControllerTest
Bug: 152212779
Change-Id: I45134cb9522a81b8e1b520938001488da7f40906

src/com/android/settings/gestures/PowerMenuPrivacyPreferenceController.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2020 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.gestures;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.os.UserHandle;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+
+import com.android.internal.widget.LockPatternUtils;
+import com.android.settings.R;
+import com.android.settings.core.TogglePreferenceController;
+import com.android.settings.overlay.FeatureFactory;
+
+public class PowerMenuPrivacyPreferenceController extends TogglePreferenceController {
+
+    private static final String SETTING_KEY = Settings.Secure.POWER_MENU_LOCKED_SHOW_CONTENT;
+    private static final String CARDS_AVAILABLE_KEY =
+            Settings.Secure.GLOBAL_ACTIONS_PANEL_AVAILABLE;
+    private static final String CARDS_ENABLED_KEY = Settings.Secure.GLOBAL_ACTIONS_PANEL_ENABLED;
+    private static final String CONTROLS_ENABLED_KEY = Settings.Secure.CONTROLS_ENABLED;
+
+
+    public PowerMenuPrivacyPreferenceController(Context context,
+            String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.Secure.getInt(mContext.getContentResolver(), SETTING_KEY, 0) != 0;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        return Settings.Secure.putInt(mContext.getContentResolver(), SETTING_KEY,
+                isChecked ? 1 : 0);
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        boolean cardsAvailable = Settings.Secure.getInt(mContext.getContentResolver(),
+                CARDS_AVAILABLE_KEY, 0) != 0;
+        final int res;
+        if (!isSecure()) {
+            res = R.string.power_menu_privacy_not_secure;
+        } else if (cardsAvailable) {
+            res = R.string.power_menu_privacy_show;
+        } else {
+            res = R.string.power_menu_privacy_show_controls;
+        }
+        return mContext.getText(res);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        // hide if lockscreen isn't secure for this user
+
+        return isEnabled() && isSecure() ? AVAILABLE : DISABLED_DEPENDENT_SETTING;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        preference.setEnabled(getAvailabilityStatus() != DISABLED_DEPENDENT_SETTING);
+        refreshSummary(preference);
+    }
+
+    private boolean isEnabled() {
+        final ContentResolver resolver = mContext.getContentResolver();
+        boolean cardsAvailable = Settings.Secure.getInt(resolver, CARDS_AVAILABLE_KEY, 0) != 0;
+        boolean cardsEnabled = Settings.Secure.getInt(resolver, CARDS_ENABLED_KEY, 0) != 0;
+        boolean controlsEnabled = Settings.Secure.getInt(resolver, CONTROLS_ENABLED_KEY, 0) != 0;
+        return (cardsAvailable && cardsEnabled) || controlsEnabled;
+    }
+
+    private boolean isSecure() {
+        final LockPatternUtils utils = FeatureFactory.getFactory(mContext)
+                .getSecurityFeatureProvider()
+                .getLockPatternUtils(mContext);
+        int userId = UserHandle.myUserId();
+        return utils.isSecure(userId);
+    }
+}