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/*
* Copyright (C) 2020 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 android.service.translation;
import android.Manifest;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.UserIdInt;
import android.app.AppGlobals;
import android.content.ComponentName;
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.ServiceInfo;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.os.RemoteException;
import android.util.AttributeSet;
import android.util.Log;
import android.util.Slog;
import android.util.Xml;
import com.android.internal.R;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
import java.io.PrintWriter;
/**
* {@link ServiceInfo} and meta-data about an {@link TranslationService}.
*
* @hide
*/
public final class TranslationServiceInfo {
private static final String TAG = "TranslationServiceInfo";
private static final String XML_TAG_SERVICE = "translation-service";
@NonNull
private final ServiceInfo mServiceInfo;
@Nullable
private final String mSettingsActivity;
private static ServiceInfo getServiceInfoOrThrow(ComponentName comp, boolean isTemp,
@UserIdInt int userId) throws PackageManager.NameNotFoundException {
int flags = PackageManager.GET_META_DATA;
if (!isTemp) {
flags |= PackageManager.MATCH_SYSTEM_ONLY;
}
ServiceInfo si = null;
try {
si = AppGlobals.getPackageManager().getServiceInfo(comp, flags, userId);
} catch (RemoteException e) {
}
if (si == null) {
throw new NameNotFoundException("Could not get serviceInfo for "
+ (isTemp ? " (temp)" : "(default system)")
+ " " + comp.flattenToShortString());
}
return si;
}
@NonNull
public ServiceInfo getServiceInfo() {
return mServiceInfo;
}
@Nullable
public String getSettingsActivity() {
return mSettingsActivity;
}
public TranslationServiceInfo(@NonNull Context context, @NonNull ComponentName comp,
boolean isTemporaryService, @UserIdInt int userId)
throws PackageManager.NameNotFoundException {
this(context, getServiceInfoOrThrow(comp, isTemporaryService, userId));
}
private TranslationServiceInfo(@NonNull Context context, @NonNull ServiceInfo si) {
// Check for permission.
if (!Manifest.permission.BIND_TRANSLATION_SERVICE.equals(si.permission)) {
Slog.w(TAG, "TranslationServiceInfo from '" + si.packageName
+ "' does not require permission "
+ Manifest.permission.BIND_TRANSLATION_SERVICE);
throw new SecurityException("Service does not require permission "
+ Manifest.permission.BIND_TRANSLATION_SERVICE);
}
mServiceInfo = si;
// Get the metadata, if declared.
// TODO: Try to find more easier way to do this.
final XmlResourceParser parser = si.loadXmlMetaData(context.getPackageManager(),
TranslationService.SERVICE_META_DATA);
if (parser == null) {
mSettingsActivity = null;
return;
}
String settingsActivity = null;
try {
final Resources resources = context.getPackageManager().getResourcesForApplication(
si.applicationInfo);
int type = 0;
while (type != XmlPullParser.END_DOCUMENT && type != XmlPullParser.START_TAG) {
type = parser.next();
}
if (XML_TAG_SERVICE.equals(parser.getName())) {
final AttributeSet allAttributes = Xml.asAttributeSet(parser);
TypedArray afsAttributes = null;
try {
afsAttributes = resources.obtainAttributes(allAttributes,
com.android.internal.R.styleable.TranslationService);
settingsActivity = afsAttributes.getString(
R.styleable.ContentCaptureService_settingsActivity);
} finally {
if (afsAttributes != null) {
afsAttributes.recycle();
}
}
} else {
Log.e(TAG, "Meta-data does not start with translation-service tag");
}
} catch (PackageManager.NameNotFoundException | IOException | XmlPullParserException e) {
Log.e(TAG, "Error parsing auto fill service meta-data", e);
}
mSettingsActivity = settingsActivity;
}
@Override
public String toString() {
final StringBuilder builder = new StringBuilder();
builder.append(getClass().getSimpleName());
builder.append("[").append(mServiceInfo);
builder.append(", settings:").append(mSettingsActivity);
return builder.toString();
}
/**
* Dumps the service information.
*/
public void dump(@NonNull String prefix, @NonNull PrintWriter pw) {
pw.print(prefix);
pw.print("Component: ");
pw.println(getServiceInfo().getComponentName());
pw.print(prefix);
pw.print("Settings: ");
pw.println(mSettingsActivity);
}
}
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