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/*
* Copyright (C) 2012 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 com.android.settings.R;
import android.app.AlertDialog;
import android.app.Activity;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.LoaderManager.LoaderCallbacks;
import android.content.AsyncTaskLoader;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.Loader;
import android.hardware.input.InputDeviceIdentifier;
import android.hardware.input.InputManager;
import android.hardware.input.KeyboardLayout;
import android.hardware.input.InputManager.InputDeviceListener;
import android.os.Bundle;
import android.view.InputDevice;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckedTextView;
import android.widget.RadioButton;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Collections;
public class KeyboardLayoutDialogFragment extends DialogFragment
implements InputDeviceListener, LoaderCallbacks<KeyboardLayoutDialogFragment.Keyboards> {
private static final String KEY_INPUT_DEVICE_IDENTIFIER = "inputDeviceIdentifier";
private InputDeviceIdentifier mInputDeviceIdentifier;
private int mInputDeviceId = -1;
private InputManager mIm;
private KeyboardLayoutAdapter mAdapter;
public KeyboardLayoutDialogFragment() {
}
public KeyboardLayoutDialogFragment(InputDeviceIdentifier inputDeviceIdentifier) {
mInputDeviceIdentifier = inputDeviceIdentifier;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
Context context = activity.getBaseContext();
mIm = (InputManager)context.getSystemService(Context.INPUT_SERVICE);
mAdapter = new KeyboardLayoutAdapter(context);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mInputDeviceIdentifier = savedInstanceState.getParcelable(KEY_INPUT_DEVICE_IDENTIFIER);
}
getLoaderManager().initLoader(0, null, this);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putParcelable(KEY_INPUT_DEVICE_IDENTIFIER, mInputDeviceIdentifier);
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Context context = getActivity();
LayoutInflater inflater = LayoutInflater.from(context);
AlertDialog.Builder builder = new AlertDialog.Builder(context)
.setTitle(R.string.keyboard_layout_dialog_title)
.setPositiveButton(R.string.keyboard_layout_dialog_setup_button,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
onSetupLayoutsButtonClicked();
}
})
.setSingleChoiceItems(mAdapter, -1,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
onKeyboardLayoutClicked(which);
}
})
.setView(inflater.inflate(R.layout.keyboard_layout_dialog_switch_hint, null));
updateSwitchHintVisibility();
return builder.create();
}
@Override
public void onResume() {
super.onResume();
mIm.registerInputDeviceListener(this, null);
InputDevice inputDevice =
mIm.getInputDeviceByDescriptor(mInputDeviceIdentifier.getDescriptor());
if (inputDevice == null) {
dismiss();
return;
}
mInputDeviceId = inputDevice.getId();
}
@Override
public void onPause() {
mIm.unregisterInputDeviceListener(this);
mInputDeviceId = -1;
super.onPause();
}
@Override
public void onCancel(DialogInterface dialog) {
super.onCancel(dialog);
dismiss();
}
private void onSetupLayoutsButtonClicked() {
((OnSetupKeyboardLayoutsListener)getTargetFragment()).onSetupKeyboardLayouts(
mInputDeviceIdentifier);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
show(getActivity().getFragmentManager(), "layout");
}
private void onKeyboardLayoutClicked(int which) {
if (which >= 0 && which < mAdapter.getCount()) {
KeyboardLayout keyboardLayout = mAdapter.getItem(which);
if (keyboardLayout != null) {
mIm.setCurrentKeyboardLayoutForInputDevice(mInputDeviceIdentifier,
keyboardLayout.getDescriptor());
}
dismiss();
}
}
@Override
public Loader<Keyboards> onCreateLoader(int id, Bundle args) {
return new KeyboardLayoutLoader(getActivity().getBaseContext(), mInputDeviceIdentifier);
}
@Override
public void onLoadFinished(Loader<Keyboards> loader, Keyboards data) {
mAdapter.clear();
mAdapter.addAll(data.keyboardLayouts);
mAdapter.setCheckedItem(data.current);
AlertDialog dialog = (AlertDialog)getDialog();
if (dialog != null) {
dialog.getListView().setItemChecked(data.current, true);
}
updateSwitchHintVisibility();
}
@Override
public void onLoaderReset(Loader<Keyboards> loader) {
mAdapter.clear();
updateSwitchHintVisibility();
}
@Override
public void onInputDeviceAdded(int deviceId) {
}
@Override
public void onInputDeviceChanged(int deviceId) {
if (mInputDeviceId >= 0 && deviceId == mInputDeviceId) {
getLoaderManager().restartLoader(0, null, this);
}
}
@Override
public void onInputDeviceRemoved(int deviceId) {
if (mInputDeviceId >= 0 && deviceId == mInputDeviceId) {
dismiss();
}
}
private void updateSwitchHintVisibility() {
AlertDialog dialog = (AlertDialog)getDialog();
if (dialog != null) {
View customPanel = dialog.findViewById(com.android.internal.R.id.customPanel);
customPanel.setVisibility(mAdapter.getCount() > 1 ? View.VISIBLE : View.GONE);
}
}
private static final class KeyboardLayoutAdapter extends ArrayAdapter<KeyboardLayout> {
private final LayoutInflater mInflater;
private int mCheckedItem = -1;
public KeyboardLayoutAdapter(Context context) {
super(context, com.android.internal.R.layout.simple_list_item_2_single_choice);
mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void setCheckedItem(int position) {
mCheckedItem = position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
KeyboardLayout item = getItem(position);
String label, collection;
if (item != null) {
label = item.getLabel();
collection = item.getCollection();
} else {
label = getContext().getString(R.string.keyboard_layout_default_label);
collection = "";
}
boolean checked = (position == mCheckedItem);
if (collection.isEmpty()) {
return inflateOneLine(convertView, parent, label, checked);
} else {
return inflateTwoLine(convertView, parent, label, collection, checked);
}
}
private View inflateOneLine(View convertView, ViewGroup parent,
String label, boolean checked) {
View view = convertView;
if (view == null || isTwoLine(view)) {
view = mInflater.inflate(
com.android.internal.R.layout.simple_list_item_single_choice,
parent, false);
setTwoLine(view, false);
}
CheckedTextView headline = (CheckedTextView) view.findViewById(android.R.id.text1);
headline.setText(label);
headline.setChecked(checked);
return view;
}
private View inflateTwoLine(View convertView, ViewGroup parent,
String label, String collection, boolean checked) {
View view = convertView;
if (view == null || !isTwoLine(view)) {
view = mInflater.inflate(
com.android.internal.R.layout.simple_list_item_2_single_choice,
parent, false);
setTwoLine(view, true);
}
TextView headline = (TextView) view.findViewById(android.R.id.text1);
TextView subText = (TextView) view.findViewById(android.R.id.text2);
RadioButton radioButton =
(RadioButton)view.findViewById(com.android.internal.R.id.radio);
headline.setText(label);
subText.setText(collection);
radioButton.setChecked(checked);
return view;
}
private static boolean isTwoLine(View view) {
return view.getTag() == Boolean.TRUE;
}
private static void setTwoLine(View view, boolean twoLine) {
view.setTag(Boolean.valueOf(twoLine));
}
}
private static final class KeyboardLayoutLoader extends AsyncTaskLoader<Keyboards> {
private final InputDeviceIdentifier mInputDeviceIdentifier;
public KeyboardLayoutLoader(Context context, InputDeviceIdentifier inputDeviceIdentifier) {
super(context);
mInputDeviceIdentifier = inputDeviceIdentifier;
}
@Override
public Keyboards loadInBackground() {
Keyboards keyboards = new Keyboards();
InputManager im = (InputManager)getContext().getSystemService(Context.INPUT_SERVICE);
String[] keyboardLayoutDescriptors = im.getKeyboardLayoutsForInputDevice(
mInputDeviceIdentifier);
for (String keyboardLayoutDescriptor : keyboardLayoutDescriptors) {
KeyboardLayout keyboardLayout = im.getKeyboardLayout(keyboardLayoutDescriptor);
if (keyboardLayout != null) {
keyboards.keyboardLayouts.add(keyboardLayout);
}
}
Collections.sort(keyboards.keyboardLayouts);
String currentKeyboardLayoutDescriptor =
im.getCurrentKeyboardLayoutForInputDevice(mInputDeviceIdentifier);
if (currentKeyboardLayoutDescriptor != null) {
final int numKeyboardLayouts = keyboards.keyboardLayouts.size();
for (int i = 0; i < numKeyboardLayouts; i++) {
if (keyboards.keyboardLayouts.get(i).getDescriptor().equals(
currentKeyboardLayoutDescriptor)) {
keyboards.current = i;
break;
}
}
}
if (keyboards.keyboardLayouts.isEmpty()) {
keyboards.keyboardLayouts.add(null); // default layout
keyboards.current = 0;
}
return keyboards;
}
@Override
protected void onStartLoading() {
super.onStartLoading();
forceLoad();
}
@Override
protected void onStopLoading() {
super.onStopLoading();
cancelLoad();
}
}
public static final class Keyboards {
public final ArrayList<KeyboardLayout> keyboardLayouts = new ArrayList<KeyboardLayout>();
public int current = -1;
}
public interface OnSetupKeyboardLayoutsListener {
public void onSetupKeyboardLayouts(InputDeviceIdentifier mInputDeviceIdentifier);
}
}