content: package com.airbnb.lottie;
  
  import android.graphics.Path;
  import android.support.annotation.Nullable;
  
  import java.util.List;
  
  class ShapeContent implements PathContent, BaseKeyframeAnimation.AnimationListener {
    private final Path path = new Path();
  
    private final LottieDrawable lottieDrawable;
    private final BaseKeyframeAnimation<?, Path> shapeAnimation;
  
    private boolean isPathValid;
    @Nullable private TrimPathContent trimPath;
  
    ShapeContent(LottieDrawable lottieDrawable, BaseLayer layer, ShapePath shape) {
      this.lottieDrawable = lottieDrawable;
      shapeAnimation = shape.getShapePath().createAnimation();
      layer.addAnimation(shapeAnimation);
      shapeAnimation.addUpdateListener(this);
    }
  
    @Override public void onValueChanged() {
      invalidate();
    }
  
    private void invalidate() {
      isPathValid = false;
      lottieDrawable.invalidateSelf();
    }
  
    @Override public void setContents(List<Content> contentsBefore, List<Content> contentsAfter) {
      for (int i = 0; i < contentsBefore.size(); i++) {
        Content content = contentsBefore.get(i);
        if (content instanceof TrimPathContent) {
          trimPath = (TrimPathContent) content;
          trimPath.addListener(this);
        }
      }
    }
  
    @Override public Path getPath() {
      if (isPathValid) {
        return path;
      }
  
      path.reset();
  
      path.set(shapeAnimation.getValue());
      path.setFillType(Path.FillType.EVEN_ODD);
  
      Utils.applyTrimPathIfNeeded(path, trimPath);
  
      isPathValid = true;
      return path;
    }
  }
  