| /* |
| * 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 android.view; |
| |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.util.Pools.SynchronizedPool; |
| |
| /** |
| * This class represents spec for performing screen magnification. |
| * |
| * @hide |
| */ |
| public class MagnificationSpec implements Parcelable { |
| private static final int MAX_POOL_SIZE = 20; |
| private static final SynchronizedPool<MagnificationSpec> sPool = |
| new SynchronizedPool<MagnificationSpec>(MAX_POOL_SIZE); |
| |
| public float scale = 1.0f; |
| public float offsetX; |
| public float offsetY; |
| |
| private MagnificationSpec() { |
| /* do nothing - reducing visibility */ |
| } |
| |
| public void initialize(float scale, float offsetX, float offsetY) { |
| if (scale < 1) { |
| throw new IllegalArgumentException("Scale must be greater than or equal to one!"); |
| } |
| this.scale = scale; |
| this.offsetX = offsetX; |
| this.offsetY = offsetY; |
| } |
| |
| public boolean isNop() { |
| return scale == 1.0f && offsetX == 0 && offsetY == 0; |
| } |
| |
| public static MagnificationSpec obtain(MagnificationSpec other) { |
| MagnificationSpec info = obtain(); |
| info.scale = other.scale; |
| info.offsetX = other.offsetX; |
| info.offsetY = other.offsetY; |
| return info; |
| } |
| |
| public static MagnificationSpec obtain() { |
| MagnificationSpec spec = sPool.acquire(); |
| return (spec != null) ? spec : new MagnificationSpec(); |
| } |
| |
| public void recycle() { |
| clear(); |
| sPool.release(this); |
| } |
| |
| public void clear() { |
| scale = 1.0f; |
| offsetX = 0.0f; |
| offsetY = 0.0f; |
| } |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel parcel, int flags) { |
| parcel.writeFloat(scale); |
| parcel.writeFloat(offsetX); |
| parcel.writeFloat(offsetY); |
| recycle(); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder builder = new StringBuilder(); |
| builder.append("<scale:"); |
| builder.append(scale); |
| builder.append(",offsetX:"); |
| builder.append(offsetX); |
| builder.append(",offsetY:"); |
| builder.append(offsetY); |
| builder.append(">"); |
| return builder.toString(); |
| } |
| |
| private void initFromParcel(Parcel parcel) { |
| scale = parcel.readFloat(); |
| offsetX = parcel.readFloat(); |
| offsetY = parcel.readFloat(); |
| } |
| |
| public static final Creator<MagnificationSpec> CREATOR = new Creator<MagnificationSpec>() { |
| @Override |
| public MagnificationSpec[] newArray(int size) { |
| return new MagnificationSpec[size]; |
| } |
| |
| @Override |
| public MagnificationSpec createFromParcel(Parcel parcel) { |
| MagnificationSpec spec = MagnificationSpec.obtain(); |
| spec.initFromParcel(parcel); |
| return spec; |
| } |
| }; |
| } |