/*
|
** Copyright 2016, 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.server.inputmethod;
|
|
import android.annotation.NonNull;
|
import android.annotation.UserIdInt;
|
import android.app.UriGrantsManager;
|
import android.content.Intent;
|
import android.net.Uri;
|
import android.os.Binder;
|
import android.os.IBinder;
|
import android.os.RemoteException;
|
|
import com.android.internal.annotations.GuardedBy;
|
import com.android.internal.inputmethod.IInputContentUriToken;
|
import com.android.server.LocalServices;
|
import com.android.server.uri.UriGrantsManagerInternal;
|
|
final class InputContentUriTokenHandler extends IInputContentUriToken.Stub {
|
|
@NonNull
|
private final Uri mUri;
|
private final int mSourceUid;
|
@NonNull
|
private final String mTargetPackage;
|
@UserIdInt
|
private final int mSourceUserId;
|
@UserIdInt
|
private final int mTargetUserId;
|
|
private final Object mLock = new Object();
|
|
@GuardedBy("mLock")
|
private IBinder mPermissionOwnerToken = null;
|
|
InputContentUriTokenHandler(@NonNull Uri contentUri, int sourceUid,
|
@NonNull String targetPackage, @UserIdInt int sourceUserId,
|
@UserIdInt int targetUserId) {
|
mUri = contentUri;
|
mSourceUid = sourceUid;
|
mTargetPackage = targetPackage;
|
mSourceUserId = sourceUserId;
|
mTargetUserId = targetUserId;
|
}
|
|
@Override
|
public void take() {
|
synchronized (mLock) {
|
if (mPermissionOwnerToken != null) {
|
// Permission is already granted.
|
return;
|
}
|
|
mPermissionOwnerToken = LocalServices.getService(UriGrantsManagerInternal.class)
|
.newUriPermissionOwner("InputContentUriTokenHandler");
|
|
doTakeLocked(mPermissionOwnerToken);
|
}
|
}
|
|
private void doTakeLocked(@NonNull IBinder permissionOwner) {
|
long origId = Binder.clearCallingIdentity();
|
try {
|
try {
|
UriGrantsManager.getService().grantUriPermissionFromOwner(
|
permissionOwner, mSourceUid, mTargetPackage, mUri,
|
Intent.FLAG_GRANT_READ_URI_PERMISSION, mSourceUserId, mTargetUserId);
|
} catch (RemoteException e) {
|
e.rethrowFromSystemServer();
|
}
|
} finally {
|
Binder.restoreCallingIdentity(origId);
|
}
|
}
|
|
@Override
|
public void release() {
|
synchronized (mLock) {
|
if (mPermissionOwnerToken == null) {
|
return;
|
}
|
try {
|
LocalServices.getService(UriGrantsManagerInternal.class)
|
.revokeUriPermissionFromOwner(mPermissionOwnerToken, mUri,
|
Intent.FLAG_GRANT_READ_URI_PERMISSION, mSourceUserId);
|
} finally {
|
mPermissionOwnerToken = null;
|
}
|
}
|
}
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
protected void finalize() throws Throwable {
|
try {
|
release();
|
} finally {
|
super.finalize();
|
}
|
}
|
}
|
