content: /*
   * Copyright 2012 - 2014 Benjamin Weiss
   *
   * 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 de.keyboardsurfer.android.widget.crouton;
  
  import android.view.View;
  import android.view.animation.Animation;
  import android.view.animation.TranslateAnimation;
  
  /** Builds the default animations for showing and hiding a {@link Crouton}. */
  final class DefaultAnimationsBuilder {
    private static final long DURATION = 400;
    private static Animation slideInDownAnimation, slideOutUpAnimation;
    private static int lastInAnimationHeight, lastOutAnimationHeight;
  
    private DefaultAnimationsBuilder() {
      /* no-op */
    }
  
    /**
     * @param croutonView
     *   The croutonView which gets animated.
     *
     * @return The default Animation for a showing {@link Crouton}.
     */
    static Animation buildDefaultSlideInDownAnimation(View croutonView) {
      if (!areLastMeasuredInAnimationHeightAndCurrentEqual(croutonView) || (null == slideInDownAnimation)) {
        slideInDownAnimation = new TranslateAnimation(
          0, 0,                               // X: from, to
          -croutonView.getMeasuredHeight(), 0 // Y: from, to
        );
        slideInDownAnimation.setDuration(DURATION);
        setLastInAnimationHeight(croutonView.getMeasuredHeight());
      }
      return slideInDownAnimation;
    }
  
    /**
     * @param croutonView
     *   The croutonView which gets animated.
     *
     * @return The default Animation for a hiding {@link Crouton}.
     */
    static Animation buildDefaultSlideOutUpAnimation(View croutonView) {
      if (!areLastMeasuredOutAnimationHeightAndCurrentEqual(croutonView) || (null == slideOutUpAnimation)) {
        slideOutUpAnimation = new TranslateAnimation(
          0, 0,                               // X: from, to
          0, -croutonView.getMeasuredHeight() // Y: from, to
        );
        slideOutUpAnimation.setDuration(DURATION);
        setLastOutAnimationHeight(croutonView.getMeasuredHeight());
      }
      return slideOutUpAnimation;
    }
  
    private static boolean areLastMeasuredInAnimationHeightAndCurrentEqual(View croutonView) {
      return areLastMeasuredAnimationHeightAndCurrentEqual(lastInAnimationHeight, croutonView);
    }
  
    private static boolean areLastMeasuredOutAnimationHeightAndCurrentEqual(View croutonView) {
      return areLastMeasuredAnimationHeightAndCurrentEqual(lastOutAnimationHeight, croutonView);
    }
  
    private static boolean areLastMeasuredAnimationHeightAndCurrentEqual(int lastHeight, View croutonView) {
      return lastHeight == croutonView.getMeasuredHeight();
    }
  
    private static void setLastInAnimationHeight(int lastInAnimationHeight) {
      DefaultAnimationsBuilder.lastInAnimationHeight = lastInAnimationHeight;
    }
  
    private static void setLastOutAnimationHeight(int lastOutAnimationHeight) {
      DefaultAnimationsBuilder.lastOutAnimationHeight = lastOutAnimationHeight;
    }
  }
  