| /* |
| * Copyright (C) 2017 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.graphics; |
| |
| import com.android.internal.annotations.GuardedBy; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.os.Parcel; |
| import android.os.Process; |
| import android.util.ArrayMap; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * This class is used for Parceling Typeface object. |
| * Note: Typeface object can not be passed over the process boundary. |
| * |
| * @hide |
| */ |
| public class LeakyTypefaceStorage { |
| private static final Object sLock = new Object(); |
| |
| @GuardedBy("sLock") |
| private static final ArrayList<Typeface> sStorage = new ArrayList<>(); |
| @GuardedBy("sLock") |
| private static final ArrayMap<Typeface, Integer> sTypefaceMap = new ArrayMap<>(); |
| |
| /** |
| * Write typeface to parcel. |
| * |
| * You can't transfer Typeface to a different process. {@link readTypefaceFromParcel} will |
| * return {@code null} if the {@link readTypefaceFromParcel} is called in a different process. |
| * |
| * @param typeface A {@link Typeface} to be written. |
| * @param parcel A {@link Parcel} object. |
| */ |
| public static void writeTypefaceToParcel(@Nullable Typeface typeface, @NonNull Parcel parcel) { |
| parcel.writeInt(Process.myPid()); |
| synchronized (sLock) { |
| final int id; |
| final Integer i = sTypefaceMap.get(typeface); |
| if (i != null) { |
| id = i.intValue(); |
| } else { |
| id = sStorage.size(); |
| sStorage.add(typeface); |
| sTypefaceMap.put(typeface, id); |
| } |
| parcel.writeInt(id); |
| } |
| } |
| |
| /** |
| * Read typeface from parcel. |
| * |
| * If the {@link Typeface} was created in another process, this method returns null. |
| * |
| * @param parcel A {@link Parcel} object |
| * @return A {@link Typeface} object. |
| */ |
| public static @Nullable Typeface readTypefaceFromParcel(@NonNull Parcel parcel) { |
| final int pid = parcel.readInt(); |
| final int typefaceId = parcel.readInt(); |
| if (pid != Process.myPid()) { |
| return null; // The Typeface was created and written in another process. |
| } |
| synchronized (sLock) { |
| return sStorage.get(typefaceId); |
| } |
| } |
| } |