content: /*
   * 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<>(MAX_POOL_SIZE);
  
      /** The magnification scaling factor. */
      public float scale = 1.0f;
  
      /**
       * The X coordinate, in unscaled screen-relative pixels, around which
       * magnification is focused.
       */
      public float offsetX;
  
      /**
       * The Y coordinate, in unscaled screen-relative pixels, around which
       * magnification is focused.
       */
      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;
      }
  
      public void setTo(MagnificationSpec other) {
          scale = other.scale;
          offsetX = other.offsetX;
          offsetY = other.offsetY;
      }
  
      @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 boolean equals(Object other) {
          if (this == other) {
              return true;
          }
  
          if (other == null || getClass() != other.getClass()) {
              return false;
          }
  
          final MagnificationSpec s = (MagnificationSpec) other;
          return scale == s.scale && offsetX == s.offsetX && offsetY == s.offsetY;
      }
  
      @Override
      public int hashCode() {
          int result = (scale != +0.0f ? Float.floatToIntBits(scale) : 0);
          result = 31 * result + (offsetX != +0.0f ? Float.floatToIntBits(offsetX) : 0);
          result = 31 * result + (offsetY != +0.0f ? Float.floatToIntBits(offsetY) : 0);
          return result;
      }
  
      @Override
      public String toString() {
          StringBuilder builder = new StringBuilder();
          builder.append("<scale:");
          builder.append(Float.toString(scale));
          builder.append(",offsetX:");
          builder.append(Float.toString(offsetX));
          builder.append(",offsetY:");
          builder.append(Float.toString(offsetY));
          builder.append(">");
          return builder.toString();
      }
  
      private void initFromParcel(Parcel parcel) {
          scale = parcel.readFloat();
          offsetX = parcel.readFloat();
          offsetY = parcel.readFloat();
      }
  
      public static final @android.annotation.NonNull 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;
          }
      };
  }
  