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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.settings.inputmethod;
import android.content.Context;
import android.hardware.input.InputDeviceIdentifier;
import android.hardware.input.InputManager;
import android.hardware.input.KeyboardLayout;
import android.view.InputDevice;
import androidx.fragment.app.Fragment;
import androidx.preference.Preference;
import androidx.preference.PreferenceScreen;
import androidx.preference.SwitchPreference;
import com.android.settings.core.BasePreferenceController;
import com.android.settingslib.core.lifecycle.LifecycleObserver;
import com.android.settingslib.core.lifecycle.events.OnStart;
import com.android.settingslib.core.lifecycle.events.OnStop;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
public class KeyboardLayoutPickerController extends BasePreferenceController implements
InputManager.InputDeviceListener, LifecycleObserver, OnStart, OnStop {
private final InputManager mIm;
private final Map<SwitchPreference, KeyboardLayout> mPreferenceMap;
private Fragment mParent;
private int mInputDeviceId;
private InputDeviceIdentifier mInputDeviceIdentifier;
private KeyboardLayout[] mKeyboardLayouts;
private PreferenceScreen mScreen;
public KeyboardLayoutPickerController(Context context, String key) {
super(context, key);
mIm = (InputManager) context.getSystemService(Context.INPUT_SERVICE);
mInputDeviceId = -1;
mPreferenceMap = new HashMap<>();
}
public void initialize(Fragment parent, InputDeviceIdentifier inputDeviceIdentifier) {
mParent = parent;
mInputDeviceIdentifier = inputDeviceIdentifier;
mKeyboardLayouts = mIm.getKeyboardLayoutsForInputDevice(mInputDeviceIdentifier);
Arrays.sort(mKeyboardLayouts);
}
@Override
public void onStart() {
mIm.registerInputDeviceListener(this, null);
final InputDevice inputDevice =
mIm.getInputDeviceByDescriptor(mInputDeviceIdentifier.getDescriptor());
if (inputDevice == null) {
mParent.getActivity().finish();
return;
}
mInputDeviceId = inputDevice.getId();
updateCheckedState();
}
@Override
public void onStop() {
mIm.unregisterInputDeviceListener(this);
mInputDeviceId = -1;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mScreen = screen;
createPreferenceHierarchy();
}
@Override
public int getAvailabilityStatus() {
return AVAILABLE;
}
@Override
public boolean handlePreferenceTreeClick(Preference preference) {
if (!(preference instanceof SwitchPreference)) {
return false;
}
final SwitchPreference switchPref = (SwitchPreference) preference;
final KeyboardLayout layout = mPreferenceMap.get(switchPref);
if (layout != null) {
final boolean checked = switchPref.isChecked();
if (checked) {
mIm.addKeyboardLayoutForInputDevice(mInputDeviceIdentifier,
layout.getDescriptor());
} else {
mIm.removeKeyboardLayoutForInputDevice(mInputDeviceIdentifier,
layout.getDescriptor());
}
}
return true;
}
@Override
public void onInputDeviceAdded(int deviceId) {
}
@Override
public void onInputDeviceRemoved(int deviceId) {
if (mInputDeviceId >= 0 && deviceId == mInputDeviceId) {
mParent.getActivity().finish();
}
}
@Override
public void onInputDeviceChanged(int deviceId) {
if (mInputDeviceId >= 0 && deviceId == mInputDeviceId) {
updateCheckedState();
}
}
private void updateCheckedState() {
final String[] enabledKeyboardLayouts = mIm.getEnabledKeyboardLayoutsForInputDevice(
mInputDeviceIdentifier);
Arrays.sort(enabledKeyboardLayouts);
for (Map.Entry<SwitchPreference, KeyboardLayout> entry : mPreferenceMap.entrySet()) {
entry.getKey().setChecked(Arrays.binarySearch(enabledKeyboardLayouts,
entry.getValue().getDescriptor()) >= 0);
}
}
private void createPreferenceHierarchy() {
for (KeyboardLayout layout : mKeyboardLayouts) {
final SwitchPreference pref = new SwitchPreference(mScreen.getContext());
pref.setTitle(layout.getLabel());
pref.setSummary(layout.getCollection());
pref.setKey(layout.getDescriptor());
mScreen.addPreference(pref);
mPreferenceMap.put(pref, layout);
}
}
}
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