/*
* Copyright (C) 2011 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 com.android.settings.SettingsPreferenceFragment;
import android.app.AlertDialog;
import android.app.Fragment;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.PreferenceActivity;
import android.provider.Settings;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.inputmethod.InputMethodInfo;
import android.view.inputmethod.InputMethodManager;
import android.view.inputmethod.InputMethodSubtype;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.Comparator;
import java.util.List;
public class InputMethodPreference extends CheckBoxPreference
implements Comparator<InputMethodPreference> {
private static final String TAG = InputMethodPreference.class.getSimpleName();
private static final float DISABLED_ALPHA = 0.4f;
private final SettingsPreferenceFragment mFragment;
private final InputMethodInfo mImi;
private final InputMethodManager mImm;
private final Intent mSettingsIntent;
private final boolean mIsSystemIme;
private AlertDialog mDialog = null;
private ImageView mInputMethodSettingsButton;
private TextView mTitleText;
private TextView mSummaryText;
private View mInputMethodPref;
private final OnClickListener mPrefOnclickListener = new OnClickListener() {
@Override
public void onClick(View arg0) {
if (!isEnabled()) {
return;
}
if (isChecked()) {
setChecked(false);
} else {
if (mIsSystemIme) {
setChecked(true);
} else {
showSecurityWarnDialog(mImi, InputMethodPreference.this);
}
}
}
};
public InputMethodPreference(SettingsPreferenceFragment fragment, Intent settingsIntent,
InputMethodManager imm, InputMethodInfo imi, int imiCount) {
super(fragment.getActivity(), null, R.style.InputMethodPreferenceStyle);
setLayoutResource(R.layout.preference_inputmethod);
setWidgetLayoutResource(R.layout.preference_inputmethod_widget);
mFragment = fragment;
mSettingsIntent = settingsIntent;
mImm = imm;
mImi = imi;
updateSummary();
mIsSystemIme = InputMethodAndSubtypeUtil.isSystemIme(imi);
final boolean isAuxIme = InputMethodAndSubtypeUtil.isAuxiliaryIme(imi);
if (imiCount <= 1 || (mIsSystemIme && !isAuxIme)) {
setEnabled(false);
}
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
mInputMethodPref = view.findViewById(R.id.inputmethod_pref);
mInputMethodPref.setOnClickListener(mPrefOnclickListener);
mInputMethodSettingsButton = (ImageView)view.findViewById(R.id.inputmethod_settings);
mTitleText = (TextView)view.findViewById(android.R.id.title);
mSummaryText = (TextView)view.findViewById(android.R.id.summary);
final boolean hasSubtypes = mImi.getSubtypeCount() > 1;
final String imiId = mImi.getId();
if (hasSubtypes) {
mInputMethodPref.setOnLongClickListener(new OnLongClickListener() {
@Override
public boolean onLongClick(View arg0) {
final Bundle bundle = new Bundle();
bundle.putString(Settings.EXTRA_INPUT_METHOD_ID, imiId);
startFragment(mFragment, InputMethodAndSubtypeEnabler.class.getName(),
0, bundle);
return true;
}
});
}
if (mSettingsIntent != null) {
mInputMethodSettingsButton.setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View arg0) {
try {
mFragment.startActivity(mSettingsIntent);
} catch (ActivityNotFoundException e) {
Log.d(TAG, "IME's Settings Activity Not Found: " + e);
// If the IME's settings activity does not exist, we can just
// do nothing...
}
}
});
}
if (hasSubtypes) {
final OnLongClickListener listener = new OnLongClickListener() {
@Override
public boolean onLongClick(View arg0) {
final Bundle bundle = new Bundle();
bundle.putString(Settings.EXTRA_INPUT_METHOD_ID, imiId);
startFragment(mFragment, InputMethodAndSubtypeEnabler.class.getName(),
0, bundle);
return true;
}
};
mInputMethodSettingsButton.setOnLongClickListener(listener);
}
if (mSettingsIntent == null) {
mInputMethodSettingsButton.setVisibility(View.GONE);
} else {
updatePreferenceViews();
}
}
@Override
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
updatePreferenceViews();
}
private void updatePreferenceViews() {
final boolean checked = isChecked();
if (mInputMethodSettingsButton != null) {
mInputMethodSettingsButton.setEnabled(checked);
mInputMethodSettingsButton.setClickable(checked);
mInputMethodSettingsButton.setFocusable(checked);
if (!checked) {
mInputMethodSettingsButton.setAlpha(DISABLED_ALPHA);
}
}
if (mTitleText != null) {
mTitleText.setEnabled(true);
}
if (mSummaryText != null) {
mSummaryText.setEnabled(checked);
}
if (mInputMethodPref != null) {
mInputMethodPref.setEnabled(true);
mInputMethodPref.setLongClickable(checked);
final boolean enabled = isEnabled();
mInputMethodPref.setOnClickListener(enabled ? mPrefOnclickListener : null);
if (!enabled) {
mInputMethodPref.setBackgroundColor(0);
}
}
}
public static boolean startFragment(
Fragment fragment, String fragmentClass, int requestCode, Bundle extras) {
if (fragment.getActivity() instanceof PreferenceActivity) {
PreferenceActivity preferenceActivity = (PreferenceActivity)fragment.getActivity();
preferenceActivity.startPreferencePanel(fragmentClass, extras, 0, null, fragment,
requestCode);
return true;
} else {
Log.w(TAG, "Parent isn't PreferenceActivity, thus there's no way to launch the "
+ "given Fragment (name: " + fragmentClass + ", requestCode: " + requestCode
+ ")");
return false;
}
}
public String getSummaryString() {
final StringBuilder builder = new StringBuilder();
final List<InputMethodSubtype> subtypes = mImm.getEnabledInputMethodSubtypeList(mImi, true);
for (InputMethodSubtype subtype : subtypes) {
if (builder.length() > 0) {
builder.append(", ");
}
final CharSequence subtypeLabel = subtype.getDisplayName(mFragment.getActivity(),
mImi.getPackageName(), mImi.getServiceInfo().applicationInfo);
builder.append(subtypeLabel);
}
return builder.toString();
}
public void updateSummary() {
final String summary = getSummaryString();
if (TextUtils.isEmpty(summary)) {
return;
}
setSummary(summary);
}
@Override
public void setChecked(boolean checked) {
super.setChecked(checked);
saveImeSettings();
updateSummary();
}
private void showSecurityWarnDialog(InputMethodInfo imi, final CheckBoxPreference chkPref) {
if (mDialog != null && mDialog.isShowing()) {
mDialog.dismiss();
}
mDialog = (new AlertDialog.Builder(mFragment.getActivity()))
.setTitle(android.R.string.dialog_alert_title)
.setIcon(android.R.drawable.ic_dialog_alert)
.setCancelable(true)
.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
chkPref.setChecked(true);
}
})
.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
})
.create();
mDialog.setMessage(mFragment.getResources().getString(R.string.ime_security_warning,
imi.getServiceInfo().applicationInfo.loadLabel(
mFragment.getActivity().getPackageManager())));
mDialog.show();
}
@Override
public int compare(InputMethodPreference arg0, InputMethodPreference arg1) {
if (arg0.isEnabled() == arg0.isEnabled()) {
return arg0.mImi.getId().compareTo(arg1.mImi.getId());
} else {
// Prefer system IMEs
return arg0.isEnabled() ? 1 : -1;
}
}
private void saveImeSettings() {
InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(
mFragment, mFragment.getActivity().getContentResolver(), mImm.getInputMethodList(),
mFragment.getResources().getConfiguration().keyboard
== Configuration.KEYBOARD_QWERTY);
}
}