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/*
* 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.view.View;
import com.android.systemui.Dumpable;
import com.android.systemui.SystemUIRootComponent;
import com.android.systemui.qs.QSFragment;
import com.android.systemui.statusbar.phone.NavigationBarFragment;
import com.android.systemui.statusbar.policy.ConfigurationController;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import javax.inject.Inject;
import javax.inject.Singleton;
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.
*/
@Singleton
public class FragmentService implements Dumpable {
private static final String TAG = "FragmentService";
private final ArrayMap<View, FragmentHostState> mHosts = new ArrayMap<>();
private final ArrayMap<String, Method> mInjectionMap = new ArrayMap<>();
private final Handler mHandler = new Handler();
private final FragmentCreator mFragmentCreator;
private ConfigurationController.ConfigurationListener mConfigurationListener =
new ConfigurationController.ConfigurationListener() {
@Override
public void onConfigChanged(Configuration newConfig) {
for (FragmentHostState state : mHosts.values()) {
state.sendConfigurationChange(newConfig);
}
}
};
@Inject
public FragmentService(SystemUIRootComponent rootComponent,
ConfigurationController configurationController) {
mFragmentCreator = rootComponent.createFragmentCreator();
initInjectionMap();
configurationController.addCallback(mConfigurationListener);
}
ArrayMap<String, Method> getInjectionMap() {
return mInjectionMap;
}
FragmentCreator getFragmentCreator() {
return mFragmentCreator;
}
private void initInjectionMap() {
for (Method method : FragmentCreator.class.getDeclaredMethods()) {
if (Fragment.class.isAssignableFrom(method.getReturnType())
&& (method.getModifiers() & Modifier.PUBLIC) != 0) {
mInjectionMap.put(method.getReturnType().getName(), method);
}
}
}
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(FileDescriptor fd, PrintWriter pw, String[] args) {
pw.println("Dumping fragments:");
for (FragmentHostState state : mHosts.values()) {
state.mFragmentHostManager.getFragmentManager().dump(" ", fd, pw, args);
}
}
/**
* The subcomponent of dagger that holds all fragments that need injection.
*/
@Subcomponent
public interface FragmentCreator {
/**
* Inject a NavigationBarFragment.
*/
NavigationBarFragment createNavigationBarFragment();
/**
* Inject a QSFragment.
*/
QSFragment createQSFragment();
}
private class FragmentHostState {
private final View mView;
private FragmentHostManager mFragmentHostManager;
public FragmentHostState(View view) {
mView = view;
mFragmentHostManager = new FragmentHostManager(FragmentService.this, mView);
}
public void sendConfigurationChange(Configuration newConfig) {
mHandler.post(() -> handleSendConfigurationChange(newConfig));
}
public FragmentHostManager getFragmentHostManager() {
return mFragmentHostManager;
}
private void handleSendConfigurationChange(Configuration newConfig) {
mFragmentHostManager.onConfigurationChanged(newConfig);
}
}
}
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