1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*
* Copyright (C) 2016 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.fragments;
import android.app.Fragment;
import android.content.res.Configuration;
import android.os.Handler;
import android.util.ArrayMap;
import android.util.Log;
import android.view.View;
import com.android.systemui.Dumpable;
import com.android.systemui.dagger.SysUISingleton;
import com.android.systemui.dump.DumpManager;
import com.android.systemui.qs.QSFragment;
import com.android.systemui.statusbar.policy.ConfigurationController;
import java.io.PrintWriter;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import javax.inject.Inject;
import dagger.Subcomponent;
/**
* Holds a map of root views to FragmentHostStates and generates them as needed.
* Also dispatches the configuration changes to all current FragmentHostStates.
*/
@SysUISingleton
public class FragmentService implements Dumpable {
private static final String TAG = "FragmentService";
private final ArrayMap<View, FragmentHostState> mHosts = new ArrayMap<>();
/**
* A map with the means to create fragments via Dagger injection.
*
* key: the fragment class name.
* value: see {@link FragmentInstantiationInfo}.
*/
private final ArrayMap<String, FragmentInstantiationInfo> mInjectionMap = new ArrayMap<>();
private final Handler mHandler = new Handler();
private final FragmentHostManager.Factory mFragmentHostManagerFactory;
private ConfigurationController.ConfigurationListener mConfigurationListener =
new ConfigurationController.ConfigurationListener() {
@Override
public void onConfigChanged(Configuration newConfig) {
for (FragmentHostState state : mHosts.values()) {
state.sendConfigurationChange(newConfig);
}
}
};
@Inject
public FragmentService(
FragmentCreator.Factory fragmentCreatorFactory,
FragmentHostManager.Factory fragmentHostManagerFactory,
ConfigurationController configurationController,
DumpManager dumpManager) {
mFragmentHostManagerFactory = fragmentHostManagerFactory;
addFragmentInstantiationProvider(fragmentCreatorFactory.build());
configurationController.addCallback(mConfigurationListener);
dumpManager.registerDumpable(getClass().getSimpleName(), this);
}
ArrayMap<String, FragmentInstantiationInfo> getInjectionMap() {
return mInjectionMap;
}
/**
* Adds a new Dagger component object that provides method(s) to create fragments via injection.
*/
public void addFragmentInstantiationProvider(Object daggerComponent) {
for (Method method : daggerComponent.getClass().getDeclaredMethods()) {
if (Fragment.class.isAssignableFrom(method.getReturnType())
&& (method.getModifiers() & Modifier.PUBLIC) != 0) {
String fragmentName = method.getReturnType().getName();
if (mInjectionMap.containsKey(fragmentName)) {
Log.w(TAG, "Fragment " + fragmentName + " is already provided by different"
+ " Dagger component; Not adding method");
continue;
}
mInjectionMap.put(
fragmentName, new FragmentInstantiationInfo(method, daggerComponent));
}
}
}
public FragmentHostManager getFragmentHostManager(View view) {
View root = view.getRootView();
FragmentHostState state = mHosts.get(root);
if (state == null) {
state = new FragmentHostState(root);
mHosts.put(root, state);
}
return state.getFragmentHostManager();
}
public void removeAndDestroy(View view) {
final FragmentHostState state = mHosts.remove(view.getRootView());
if (state != null) {
state.mFragmentHostManager.destroy();
}
}
public void destroyAll() {
for (FragmentHostState state : mHosts.values()) {
state.mFragmentHostManager.destroy();
}
}
@Override
public void dump(PrintWriter pw, String[] args) {
pw.println("Dumping fragments:");
for (FragmentHostState state : mHosts.values()) {
state.mFragmentHostManager.getFragmentManager().dump(" ", null, pw, args);
}
}
/**
* The subcomponent of dagger that holds all fragments that need injection.
*/
@Subcomponent
public interface FragmentCreator {
/** Factory for creating a FragmentCreator. */
@Subcomponent.Factory
interface Factory {
FragmentCreator build();
}
/**
* Inject a QSFragment.
*/
QSFragment createQSFragment();
}
private class FragmentHostState {
private final View mView;
private FragmentHostManager mFragmentHostManager;
public FragmentHostState(View view) {
mView = view;
mFragmentHostManager = mFragmentHostManagerFactory.create(mView);
}
public void sendConfigurationChange(Configuration newConfig) {
mHandler.post(() -> handleSendConfigurationChange(newConfig));
}
public FragmentHostManager getFragmentHostManager() {
return mFragmentHostManager;
}
private void handleSendConfigurationChange(Configuration newConfig) {
mFragmentHostManager.onConfigurationChanged(newConfig);
}
}
/** An object containing the information needed to instantiate a fragment. */
static class FragmentInstantiationInfo {
/** The method that returns a newly-created fragment of the given class. */
final Method mMethod;
/** The Dagger component that the method should be invoked on. */
final Object mDaggerComponent;
FragmentInstantiationInfo(Method method, Object daggerComponent) {
this.mMethod = method;
this.mDaggerComponent = daggerComponent;
}
}
}
|
