1 /*
<lambda>null2  * Copyright (C) 2024 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.settings.print
18 
19 import android.content.Context
20 import android.graphics.drawable.Drawable
21 import android.print.PrintManager
22 import android.printservice.PrintServiceInfo
23 import com.android.settings.R
24 import com.android.settingslib.spa.framework.util.mapItem
25 import kotlinx.coroutines.Dispatchers
26 import kotlinx.coroutines.channels.awaitClose
27 import kotlinx.coroutines.flow.Flow
28 import kotlinx.coroutines.flow.callbackFlow
29 import kotlinx.coroutines.flow.conflate
30 import kotlinx.coroutines.flow.flowOn
31 import kotlinx.coroutines.flow.map
32 
33 class PrintRepository(private val context: Context) {
34 
35     private val printManager = context.getSystemService(PrintManager::class.java)!!
36     private val packageManager = context.packageManager
37 
38     data class PrintServiceDisplayInfo(
39         val title: String,
40         val isEnabled: Boolean,
41         val summary: String,
42         val icon: Drawable,
43         val componentName: String,
44     )
45 
46     fun printServiceDisplayInfosFlow(): Flow<List<PrintServiceDisplayInfo>> =
47         printServicesFlow()
48             .mapItem { printService -> printService.toPrintServiceDisplayInfo() }
49             .conflate()
50             .flowOn(Dispatchers.Default)
51 
52     private fun PrintServiceInfo.toPrintServiceDisplayInfo() = PrintServiceDisplayInfo(
53         title = resolveInfo.loadLabel(packageManager).toString(),
54         isEnabled = isEnabled,
55         summary = context.getString(
56             if (isEnabled) R.string.print_feature_state_on else R.string.print_feature_state_off
57         ),
58         icon = resolveInfo.loadIcon(packageManager),
59         componentName = componentName.flattenToString(),
60     )
61 
62     private fun printServicesFlow(): Flow<List<PrintServiceInfo>> =
63         printManager.printServicesChangeFlow()
64             .map { printManager.getPrintServices(PrintManager.ALL_SERVICES) }
65             .conflate()
66             .flowOn(Dispatchers.Default)
67 
68     private companion object {
69         fun PrintManager.printServicesChangeFlow(): Flow<Unit> = callbackFlow {
70             val listener = PrintManager.PrintServicesChangeListener { trySend(Unit) }
71             addPrintServicesChangeListener(listener, null)
72             trySend(Unit)
73             awaitClose { removePrintServicesChangeListener(listener) }
74         }.conflate().flowOn(Dispatchers.Default)
75     }
76 }
77