1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
5  * except in compliance with the License. You may obtain a copy of the License at
6  *
7  *      http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software distributed under the
10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
11  * KIND, either express or implied. See the License for the specific language governing
12  * permissions and limitations under the License.
13  */
14 
15 package com.android.systemui.statusbar.phone
16 
17 import android.content.Context
18 import android.content.pm.ActivityInfo
19 import android.content.res.Configuration
20 import android.os.LocaleList
21 import com.android.systemui.statusbar.policy.ConfigurationController
22 
23 import java.util.ArrayList
24 
25 class ConfigurationControllerImpl(context: Context) : ConfigurationController {
26 
27     private val listeners: MutableList<ConfigurationController.ConfigurationListener> = ArrayList()
28     private val lastConfig = Configuration()
29     private var density: Int = 0
30     private var fontScale: Float = 0.toFloat()
31     private val inCarMode: Boolean
32     private var uiMode: Int = 0
33     private var localeList: LocaleList? = null
34     private val context: Context
35 
36     init {
37         val currentConfig = context.resources.configuration
38         this.context = context
39         fontScale = currentConfig.fontScale
40         density = currentConfig.densityDpi
41         inCarMode = currentConfig.uiMode and Configuration.UI_MODE_TYPE_MASK ==
42                 Configuration.UI_MODE_TYPE_CAR
43         uiMode = currentConfig.uiMode and Configuration.UI_MODE_NIGHT_MASK
44         localeList = currentConfig.locales
45     }
46 
notifyThemeChangednull47     override fun notifyThemeChanged() {
48         val listeners = ArrayList(listeners)
49 
50         listeners.filterForEach({ this.listeners.contains(it) }) {
51             it.onThemeChanged()
52         }
53     }
54 
onConfigurationChangednull55     override fun onConfigurationChanged(newConfig: Configuration) {
56         // Avoid concurrent modification exception
57         val listeners = ArrayList(listeners)
58 
59         listeners.filterForEach({ this.listeners.contains(it) }) {
60             it.onConfigChanged(newConfig)
61         }
62         val fontScale = newConfig.fontScale
63         val density = newConfig.densityDpi
64         val uiMode = newConfig.uiMode and Configuration.UI_MODE_NIGHT_MASK
65         val uiModeChanged = uiMode != this.uiMode
66         if (density != this.density || fontScale != this.fontScale ||
67                 inCarMode && uiModeChanged) {
68             listeners.filterForEach({ this.listeners.contains(it) }) {
69                 it.onDensityOrFontScaleChanged()
70             }
71             this.density = density
72             this.fontScale = fontScale
73         }
74 
75         val localeList = newConfig.locales
76         if (localeList != this.localeList) {
77             this.localeList = localeList
78             listeners.filterForEach({ this.listeners.contains(it) }) {
79                 it.onLocaleListChanged()
80             }
81         }
82 
83         if (uiModeChanged) {
84             // We need to force the style re-evaluation to make sure that it's up to date
85             // and attrs were reloaded.
86             context.theme.applyStyle(context.themeResId, true)
87 
88             this.uiMode = uiMode
89             listeners.filterForEach({ this.listeners.contains(it) }) {
90                 it.onUiModeChanged()
91             }
92         }
93 
94         if (lastConfig.updateFrom(newConfig) and ActivityInfo.CONFIG_ASSETS_PATHS != 0) {
95             listeners.filterForEach({ this.listeners.contains(it) }) {
96                 it.onOverlayChanged()
97             }
98         }
99     }
100 
addCallbacknull101     override fun addCallback(listener: ConfigurationController.ConfigurationListener) {
102         listeners.add(listener)
103         listener.onDensityOrFontScaleChanged()
104     }
105 
removeCallbacknull106     override fun removeCallback(listener: ConfigurationController.ConfigurationListener) {
107         listeners.remove(listener)
108     }
109 }
110 
111 // This could be done with a Collection.filter and Collection.forEach, but Collection.filter
112 // creates a new array to store them in and we really don't need that here, so this provides
113 // a little more optimized inline version.
filterForEachnull114 inline fun <T> Collection<T>.filterForEach(f: (T) -> Boolean, execute: (T) -> Unit) {
115     forEach {
116         if (f.invoke(it)) {
117             execute.invoke(it)
118         }
119     }
120 }
121