Add settings for notification bubbling

Globally, as well as at the app and channel level

Test: atest
Bug: 123543052
Change-Id: I1668b592c5d175d77d6a38f35e7576d641175d44

src/com/android/settings/notification/BubblePreferenceController.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2019 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.notification;
+
+import static android.provider.Settings.Secure.NOTIFICATION_BUBBLES;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.RestrictedSwitchPreference;
+
+import androidx.preference.Preference;
+
+public class BubblePreferenceController extends NotificationPreferenceController
+        implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener {
+
+    private static final String TAG = "BubblePrefContr";
+    private static final String KEY = "bubble";
+    private static final int SYSTEM_WIDE_ON = 1;
+    private static final int SYSTEM_WIDE_OFF = 0;
+
+    public BubblePreferenceController(Context context, NotificationBackend backend) {
+        super(context, backend);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        if (!super.isAvailable()) {
+            return false;
+        }
+        if (mAppRow == null && mChannel == null) {
+            return false;
+        }
+        if (Settings.Secure.getInt(mContext.getContentResolver(),
+                NOTIFICATION_BUBBLES, SYSTEM_WIDE_ON) == SYSTEM_WIDE_OFF) {
+            return false;
+        }
+        if (mChannel != null) {
+            if (isDefaultChannel()) {
+                return true;
+            } else {
+                return mAppRow == null ? false : mAppRow.allowBubbles;
+            }
+        }
+        return true;
+    }
+
+    public void updateState(Preference preference) {
+        if (mAppRow != null) {
+            RestrictedSwitchPreference pref = (RestrictedSwitchPreference) preference;
+            pref.setDisabledByAdmin(mAdmin);
+            if (mChannel != null) {
+                pref.setChecked(mChannel.canBubble());
+                pref.setEnabled(isChannelConfigurable() && !pref.isDisabledByAdmin());
+            } else {
+                pref.setChecked(mAppRow.allowBubbles);
+            }
+        }
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean value = (Boolean) newValue;
+        if (mChannel != null) {
+            mChannel.setAllowBubbles(value);
+            saveChannel();
+        } else if (mAppRow != null){
+            mAppRow.allowBubbles = value;
+            mBackend.setAllowBubbles(mAppRow.pkg, mAppRow.uid, value);
+        }
+        return true;
+    }
+
+}