content: /*
   * Copyright (C) 2007 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.animation;
  
  import android.content.Context;
  import android.content.res.Resources;
  import android.content.res.Resources.Theme;
  import android.content.res.TypedArray;
  import android.util.AttributeSet;
  
  import com.android.internal.R;
  import com.android.internal.view.animation.HasNativeInterpolator;
  import com.android.internal.view.animation.NativeInterpolatorFactory;
  import com.android.internal.view.animation.NativeInterpolatorFactoryHelper;
  
  /**
   * Repeats the animation for a specified number of cycles. The
   * rate of change follows a sinusoidal pattern.
   *
   */
  @HasNativeInterpolator
  public class CycleInterpolator extends BaseInterpolator implements NativeInterpolatorFactory {
      public CycleInterpolator(float cycles) {
          mCycles = cycles;
      }
  
      public CycleInterpolator(Context context, AttributeSet attrs) {
          this(context.getResources(), context.getTheme(), attrs);
      }
  
      /** @hide */
      public CycleInterpolator(Resources resources, Theme theme, AttributeSet attrs) {
          TypedArray a;
          if (theme != null) {
              a = theme.obtainStyledAttributes(attrs, R.styleable.CycleInterpolator, 0, 0);
          } else {
              a = resources.obtainAttributes(attrs, R.styleable.CycleInterpolator);
          }
  
          mCycles = a.getFloat(R.styleable.CycleInterpolator_cycles, 1.0f);
          setChangingConfiguration(a.getChangingConfigurations());
          a.recycle();
      }
  
      public float getInterpolation(float input) {
          return (float)(Math.sin(2 * mCycles * Math.PI * input));
      }
  
      private float mCycles;
  
      /** @hide */
      @Override
      public long createNativeInterpolator() {
          return NativeInterpolatorFactoryHelper.createCycleInterpolator(mCycles);
      }
  }
  