1 /*
2  * Copyright (C) 2022 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 @file:OptIn(ExperimentalTime::class)
18 
19 package com.android.settingslib.spa.framework.compose
20 
21 import android.util.Log
22 import androidx.compose.runtime.Composable
23 import androidx.compose.runtime.remember
24 import kotlin.time.ExperimentalTime
25 import kotlin.time.TimeSource
26 
27 const val ENABLE_MEASURE_TIME = false
28 
29 interface TimeMeasurer {
lognull30     fun log(msg: String) {}
logFirstnull31     fun logFirst(msg: String) {}
32 
33     companion object {
34         private object EmptyTimeMeasurer : TimeMeasurer
35 
36         @Composable
<lambda>null37         fun rememberTimeMeasurer(tag: String): TimeMeasurer = remember {
38             if (ENABLE_MEASURE_TIME) TimeMeasurerImpl(tag) else EmptyTimeMeasurer
39         }
40     }
41 }
42 
43 private class TimeMeasurerImpl(private val tag: String) : TimeMeasurer {
44     private val mark = TimeSource.Monotonic.markNow()
45     private val msgLogged = mutableSetOf<String>()
46 
lognull47     override fun log(msg: String) {
48         Log.d(tag, "Timer $msg: ${mark.elapsedNow()}")
49     }
50 
logFirstnull51     override fun logFirst(msg: String) {
52         if (msgLogged.add(msg)) {
53             Log.d(tag, "Timer $msg: ${mark.elapsedNow()}")
54         }
55     }
56 }
57