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/*
* Copyright (C) 2018 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.launcher3.config;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Process;
import android.preference.PreferenceDataStore;
import android.preference.PreferenceFragment;
import android.preference.SwitchPreference;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.Toast;
import com.android.launcher3.R;
import com.android.launcher3.config.BaseFlags.TogglableFlag;
/**
* Dev-build only UI allowing developers to toggle flag settings. See {@link FeatureFlags}.
*/
public final class FlagTogglerPreferenceFragment extends PreferenceFragment {
private static final String TAG = "FlagTogglerPrefFrag";
private SharedPreferences mSharedPreferences;
private MenuItem saveButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.flag_preferences);
mSharedPreferences = getContext().getSharedPreferences(
FeatureFlags.FLAGS_PREF_NAME, Context.MODE_PRIVATE);
// For flag overrides we only want to store when the engineer chose to override the
// flag with a different value than the default. That way, when we flip flags in
// future, engineers will pick up the new value immediately. To accomplish this, we use a
// custom preference data store.
getPreferenceManager().setPreferenceDataStore(new PreferenceDataStore() {
@Override
public void putBoolean(String key, boolean value) {
for (TogglableFlag flag : FeatureFlags.getTogglableFlags()) {
if (flag.getKey().equals(key)) {
if (value == flag.getDefaultValue()) {
mSharedPreferences.edit().remove(key).apply();
} else {
mSharedPreferences.edit().putBoolean(key, value).apply();
}
}
}
}
});
for (TogglableFlag flag : FeatureFlags.getTogglableFlags()) {
SwitchPreference switchPreference = new SwitchPreference(getContext());
switchPreference.setKey(flag.getKey());
switchPreference.setDefaultValue(flag.getDefaultValue());
switchPreference.setChecked(getFlagStateFromSharedPrefs(flag));
switchPreference.setTitle(flag.getKey());
switchPreference.setSummaryOn(flag.getDefaultValue() ? "" : "overridden");
switchPreference.setSummaryOff(flag.getDefaultValue() ? "overridden" : "");
getPreferenceScreen().addPreference(switchPreference);
}
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
saveButton = menu.add("Apply");
saveButton.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item == saveButton) {
mSharedPreferences.edit().commit();
Log.e(TAG,
"Killing launcher process " + Process.myPid() + " to apply new flag values");
System.exit(0);
}
return super.onOptionsItemSelected(item);
}
@Override
public void onStop() {
boolean anyChanged = false;
for (TogglableFlag flag : FeatureFlags.getTogglableFlags()) {
anyChanged = anyChanged ||
getFlagStateFromSharedPrefs(flag) != flag.get();
}
if (anyChanged) {
Toast.makeText(
getContext(),
"Flag won't be applied until you restart launcher",
Toast.LENGTH_LONG).show();
}
super.onStop();
}
private boolean getFlagStateFromSharedPrefs(TogglableFlag flag) {
return mSharedPreferences.getBoolean(flag.getKey(), flag.getDefaultValue());
}
}
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