1 /*
<lambda>null2  * Copyright 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.systemui.statusbar.notification.collection.coordinator
18 
19 import android.util.ArrayMap
20 import com.android.systemui.statusbar.notification.collection.GroupEntry
21 import com.android.systemui.statusbar.notification.collection.ListEntry
22 import com.android.systemui.statusbar.notification.collection.NotifPipeline
23 import com.android.systemui.statusbar.notification.collection.coordinator.dagger.CoordinatorScope
24 import com.android.systemui.statusbar.notification.collection.render.NotifGroupController
25 import javax.inject.Inject
26 
27 /** A small coordinator which calculates, stores, and applies the untruncated child count. */
28 @CoordinatorScope
29 class GroupCountCoordinator @Inject constructor() : Coordinator {
30     private val untruncatedChildCounts = ArrayMap<GroupEntry, Int>()
31 
32     override fun attach(pipeline: NotifPipeline) {
33         pipeline.addOnBeforeFinalizeFilterListener(::onBeforeFinalizeFilter)
34         pipeline.addOnAfterRenderGroupListener(::onAfterRenderGroup)
35     }
36 
37     private fun onBeforeFinalizeFilter(entries: List<ListEntry>) {
38         // save untruncated child counts to our internal map
39         untruncatedChildCounts.clear()
40         entries.asSequence().filterIsInstance<GroupEntry>().forEach { groupEntry ->
41             untruncatedChildCounts[groupEntry] = groupEntry.children.size
42         }
43     }
44 
45     private fun onAfterRenderGroup(group: GroupEntry, controller: NotifGroupController) {
46         // find the untruncated child count for a group and apply it to the controller
47         val count = untruncatedChildCounts[group]
48         checkNotNull(count) { "No untruncated child count for group: ${group.key}" }
49         controller.setUntruncatedChildCount(count)
50     }
51 }