| /* |
| * 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.systemui.bubbles.storage |
| |
| import javax.inject.Inject |
| import javax.inject.Singleton |
| |
| private const val CAPACITY = 16 |
| |
| /** |
| * BubbleVolatileRepository holds the most updated snapshot of list of bubbles for in-memory |
| * manipulation. |
| */ |
| @Singleton |
| class BubbleVolatileRepository @Inject constructor() { |
| /** |
| * An ordered set of bubbles based on their natural ordering. |
| */ |
| private val entities = mutableSetOf<BubbleXmlEntity>() |
| |
| /** |
| * Returns a snapshot of all the bubbles. |
| */ |
| val bubbles: List<BubbleXmlEntity> |
| @Synchronized |
| get() = entities.toList() |
| |
| /** |
| * Add the bubble to memory and perform a de-duplication. In case the bubble already exists, |
| * the bubble will be moved to the last. |
| */ |
| fun addBubble(bubble: BubbleXmlEntity) = addBubbles(listOf(bubble)) |
| |
| /** |
| * Add the bubbles to memory and perform a de-duplication. In case a bubble already exists, |
| * it will be moved to the last. |
| */ |
| @Synchronized |
| fun addBubbles(bubbles: List<BubbleXmlEntity>) { |
| if (bubbles.isEmpty()) return |
| bubbles.forEach { entities.remove(it) } |
| if (entities.size + bubbles.size >= CAPACITY) { |
| entities.drop(entities.size + bubbles.size - CAPACITY) |
| } |
| entities.addAll(bubbles.reversed()) |
| } |
| |
| @Synchronized |
| fun removeBubbles(bubbles: List<BubbleXmlEntity>) { |
| bubbles.forEach { entities.remove(it) } |
| } |
| } |