content: /*
   * Copyright (C) 2010 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 com.hx.curtain.drawer.nineoldandroids.animation;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.Map;
  
  import android.util.Log;
  import android.view.View;
  
  import com.hx.curtain.drawer.nineoldandroids.util.Property;
  import com.hx.curtain.drawer.nineoldandroids.view.animation.AnimatorProxy;
  
  /**
   * This subclass of {@link ValueAnimator} provides support for animating properties on target objects.
   * The constructors of this class take parameters to define the target object that will be animated
   * as well as the name of the property that will be animated. Appropriate set/get functions
   * are then determined internally and the animation will call these functions as necessary to
   * animate the property.
   *
   * @see #setPropertyName(String)
   *
   */
  public final class ObjectAnimator extends ValueAnimator {
      private static final boolean DBG = false;
      private static final Map<String, Property> PROXY_PROPERTIES = new HashMap<String, Property>();
  
      static {
          PROXY_PROPERTIES.put("alpha", PreHoneycombCompat.ALPHA);
          PROXY_PROPERTIES.put("pivotX", PreHoneycombCompat.PIVOT_X);
          PROXY_PROPERTIES.put("pivotY", PreHoneycombCompat.PIVOT_Y);
          PROXY_PROPERTIES.put("translationX", PreHoneycombCompat.TRANSLATION_X);
          PROXY_PROPERTIES.put("translationY", PreHoneycombCompat.TRANSLATION_Y);
          PROXY_PROPERTIES.put("rotation", PreHoneycombCompat.ROTATION);
          PROXY_PROPERTIES.put("rotationX", PreHoneycombCompat.ROTATION_X);
          PROXY_PROPERTIES.put("rotationY", PreHoneycombCompat.ROTATION_Y);
          PROXY_PROPERTIES.put("scaleX", PreHoneycombCompat.SCALE_X);
          PROXY_PROPERTIES.put("scaleY", PreHoneycombCompat.SCALE_Y);
          PROXY_PROPERTIES.put("scrollX", PreHoneycombCompat.SCROLL_X);
          PROXY_PROPERTIES.put("scrollY", PreHoneycombCompat.SCROLL_Y);
          PROXY_PROPERTIES.put("x", PreHoneycombCompat.X);
          PROXY_PROPERTIES.put("y", PreHoneycombCompat.Y);
      }
  
      // The target object on which the property exists, set in the constructor
      private Object mTarget;
  
      private String mPropertyName;
  
      private Property mProperty;
  
      /**
       * Sets the name of the property that will be animated. This name is used to derive
       * a setter function that will be called to set animated values.
       * For example, a property name of <code>foo</code> will result
       * in a call to the function <code>setFoo()</code> on the target object. If either
       * <code>valueFrom</code> or <code>valueTo</code> is null, then a getter function will
       * also be derived and called.
       *
       * <p>For best performance of the mechanism that calls the setter function determined by the
       * name of the property being animated, use <code>float</code> or <code>int</code> typed values,
       * and make the setter function for those properties have a <code>void</code> return value. This
       * will cause the code to take an optimized path for these constrained circumstances. Other
       * property types and return types will work, but will have more overhead in processing
       * the requests due to normal reflection mechanisms.</p>
       *
       * <p>Note that the setter function derived from this property name
       * must take the same parameter type as the
       * <code>valueFrom</code> and <code>valueTo</code> properties, otherwise the call to
       * the setter function will fail.</p>
       *
       * <p>If this ObjectAnimator has been set up to animate several properties together,
       * using more than one PropertyValuesHolder objects, then setting the propertyName simply
       * sets the propertyName in the first of those PropertyValuesHolder objects.</p>
       *
       * @param propertyName The name of the property being animated. Should not be null.
       */
      public void setPropertyName(String propertyName) {
          // mValues could be null if this is being constructed piecemeal. Just record the
          // propertyName to be used later when setValues() is called if so.
          if (mValues != null) {
              PropertyValuesHolder valuesHolder = mValues[0];
              String oldName = valuesHolder.getPropertyName();
              valuesHolder.setPropertyName(propertyName);
              mValuesMap.remove(oldName);
              mValuesMap.put(propertyName, valuesHolder);
          }
          mPropertyName = propertyName;
          // New property/values/target should cause re-initialization prior to starting
          mInitialized = false;
      }
  
      /**
       * Sets the property that will be animated. Property objects will take precedence over
       * properties specified by the {@link #setPropertyName(String)} method. Animations should
       * be set up to use one or the other, not both.
       *
       * @param property The property being animated. Should not be null.
       */
      public void setProperty(Property property) {
          // mValues could be null if this is being constructed piecemeal. Just record the
          // propertyName to be used later when setValues() is called if so.
          if (mValues != null) {
              PropertyValuesHolder valuesHolder = mValues[0];
              String oldName = valuesHolder.getPropertyName();
              valuesHolder.setProperty(property);
              mValuesMap.remove(oldName);
              mValuesMap.put(mPropertyName, valuesHolder);
          }
          if (mProperty != null) {
              mPropertyName = property.getName();
          }
          mProperty = property;
          // New property/values/target should cause re-initialization prior to starting
          mInitialized = false;
      }
  
      /**
       * Gets the name of the property that will be animated. This name will be used to derive
       * a setter function that will be called to set animated values.
       * For example, a property name of <code>foo</code> will result
       * in a call to the function <code>setFoo()</code> on the target object. If either
       * <code>valueFrom</code> or <code>valueTo</code> is null, then a getter function will
       * also be derived and called.
       */
      public String getPropertyName() {
          return mPropertyName;
      }
  
      /**
       * Creates a new ObjectAnimator object. This default constructor is primarily for
       * use internally; the other constructors which take parameters are more generally
       * useful.
       */
      public ObjectAnimator() {
      }
  
      /**
       * Private utility constructor that initializes the target object and name of the
       * property being animated.
       *
       * @param target The object whose property is to be animated. This object should
       * have a public method on it called <code>setName()</code>, where <code>name</code> is
       * the value of the <code>propertyName</code> parameter.
       * @param propertyName The name of the property being animated.
       */
      private ObjectAnimator(Object target, String propertyName) {
          mTarget = target;
          setPropertyName(propertyName);
      }
  
      /**
       * Private utility constructor that initializes the target object and property being animated.
       *
       * @param target The object whose property is to be animated.
       * @param property The property being animated.
       */
      private <T> ObjectAnimator(T target, Property<T, ?> property) {
          mTarget = target;
          setProperty(property);
      }
  
      /**
       * Constructs and returns an ObjectAnimator that animates between int values. A single
       * value implies that that value is the one being animated to. Two values imply a starting
       * and ending values. More than two values imply a starting value, values to animate through
       * along the way, and an ending value (these values will be distributed evenly across
       * the duration of the animation).
       *
       * @param target The object whose property is to be animated. This object should
       * have a public method on it called <code>setName()</code>, where <code>name</code> is
       * the value of the <code>propertyName</code> parameter.
       * @param propertyName The name of the property being animated.
       * @param values A set of values that the animation will animate between over time.
       * @return An ObjectAnimator object that is set up to animate between the given values.
       */
      public static ObjectAnimator ofInt(Object target, String propertyName, int... values) {
          ObjectAnimator anim = new ObjectAnimator(target, propertyName);
          anim.setIntValues(values);
          return anim;
      }
  
      /**
       * Constructs and returns an ObjectAnimator that animates between int values. A single
       * value implies that that value is the one being animated to. Two values imply a starting
       * and ending values. More than two values imply a starting value, values to animate through
       * along the way, and an ending value (these values will be distributed evenly across
       * the duration of the animation).
       *
       * @param target The object whose property is to be animated.
       * @param property The property being animated.
       * @param values A set of values that the animation will animate between over time.
       * @return An ObjectAnimator object that is set up to animate between the given values.
       */
      public static <T> ObjectAnimator ofInt(T target, Property<T, Integer> property, int... values) {
          ObjectAnimator anim = new ObjectAnimator(target, property);
          anim.setIntValues(values);
          return anim;
      }
  
      /**
       * Constructs and returns an ObjectAnimator that animates between float values. A single
       * value implies that that value is the one being animated to. Two values imply a starting
       * and ending values. More than two values imply a starting value, values to animate through
       * along the way, and an ending value (these values will be distributed evenly across
       * the duration of the animation).
       *
       * @param target The object whose property is to be animated. This object should
       * have a public method on it called <code>setName()</code>, where <code>name</code> is
       * the value of the <code>propertyName</code> parameter.
       * @param propertyName The name of the property being animated.
       * @param values A set of values that the animation will animate between over time.
       * @return An ObjectAnimator object that is set up to animate between the given values.
       */
      public static ObjectAnimator ofFloat(Object target, String propertyName, float... values) {
          ObjectAnimator anim = new ObjectAnimator(target, propertyName);
          anim.setFloatValues(values);
          return anim;
      }
  
      /**
       * Constructs and returns an ObjectAnimator that animates between float values. A single
       * value implies that that value is the one being animated to. Two values imply a starting
       * and ending values. More than two values imply a starting value, values to animate through
       * along the way, and an ending value (these values will be distributed evenly across
       * the duration of the animation).
       *
       * @param target The object whose property is to be animated.
       * @param property The property being animated.
       * @param values A set of values that the animation will animate between over time.
       * @return An ObjectAnimator object that is set up to animate between the given values.
       */
      public static <T> ObjectAnimator ofFloat(T target, Property<T, Float> property,
              float... values) {
          ObjectAnimator anim = new ObjectAnimator(target, property);
          anim.setFloatValues(values);
          return anim;
      }
  
      /**
       * Constructs and returns an ObjectAnimator that animates between Object values. A single
       * value implies that that value is the one being animated to. Two values imply a starting
       * and ending values. More than two values imply a starting value, values to animate through
       * along the way, and an ending value (these values will be distributed evenly across
       * the duration of the animation).
       *
       * @param target The object whose property is to be animated. This object should
       * have a public method on it called <code>setName()</code>, where <code>name</code> is
       * the value of the <code>propertyName</code> parameter.
       * @param propertyName The name of the property being animated.
       * @param evaluator A TypeEvaluator that will be called on each animation frame to
       * provide the necessary interpolation between the Object values to derive the animated
       * value.
       * @param values A set of values that the animation will animate between over time.
       * @return An ObjectAnimator object that is set up to animate between the given values.
       */
      public static ObjectAnimator ofObject(Object target, String propertyName,
              TypeEvaluator evaluator, Object... values) {
          ObjectAnimator anim = new ObjectAnimator(target, propertyName);
          anim.setObjectValues(values);
          anim.setEvaluator(evaluator);
          return anim;
      }
  
      /**
       * Constructs and returns an ObjectAnimator that animates between Object values. A single
       * value implies that that value is the one being animated to. Two values imply a starting
       * and ending values. More than two values imply a starting value, values to animate through
       * along the way, and an ending value (these values will be distributed evenly across
       * the duration of the animation).
       *
       * @param target The object whose property is to be animated.
       * @param property The property being animated.
       * @param evaluator A TypeEvaluator that will be called on each animation frame to
       * provide the necessary interpolation between the Object values to derive the animated
       * value.
       * @param values A set of values that the animation will animate between over time.
       * @return An ObjectAnimator object that is set up to animate between the given values.
       */
      public static <T, V> ObjectAnimator ofObject(T target, Property<T, V> property,
              TypeEvaluator<V> evaluator, V... values) {
          ObjectAnimator anim = new ObjectAnimator(target, property);
          anim.setObjectValues(values);
          anim.setEvaluator(evaluator);
          return anim;
      }
  
      /**
       * Constructs and returns an ObjectAnimator that animates between the sets of values specified
       * in <code>PropertyValueHolder</code> objects. This variant should be used when animating
       * several properties at once with the same ObjectAnimator, since PropertyValuesHolder allows
       * you to associate a set of animation values with a property name.
       *
       * @param target The object whose property is to be animated. Depending on how the
       * PropertyValuesObjects were constructed, the target object should either have the {@link
       * android.util.Property} objects used to construct the PropertyValuesHolder objects or (if the
       * PropertyValuesHOlder objects were created with property names) the target object should have
       * public methods on it called <code>setName()</code>, where <code>name</code> is the name of
       * the property passed in as the <code>propertyName</code> parameter for each of the
       * PropertyValuesHolder objects.
       * @param values A set of PropertyValuesHolder objects whose values will be animated between
       * over time.
       * @return An ObjectAnimator object that is set up to animate between the given values.
       */
      public static ObjectAnimator ofPropertyValuesHolder(Object target,
              PropertyValuesHolder... values) {
          ObjectAnimator anim = new ObjectAnimator();
          anim.mTarget = target;
          anim.setValues(values);
          return anim;
      }
  
      @Override
      public void setIntValues(int... values) {
          if (mValues == null || mValues.length == 0) {
              // No values yet - this animator is being constructed piecemeal. Init the values with
              // whatever the current propertyName is
              if (mProperty != null) {
                  setValues(PropertyValuesHolder.ofInt(mProperty, values));
              } else {
                  setValues(PropertyValuesHolder.ofInt(mPropertyName, values));
              }
          } else {
              super.setIntValues(values);
          }
      }
  
      @Override
      public void setFloatValues(float... values) {
          if (mValues == null || mValues.length == 0) {
              // No values yet - this animator is being constructed piecemeal. Init the values with
              // whatever the current propertyName is
              if (mProperty != null) {
                  setValues(PropertyValuesHolder.ofFloat(mProperty, values));
              } else {
                  setValues(PropertyValuesHolder.ofFloat(mPropertyName, values));
              }
          } else {
              super.setFloatValues(values);
          }
      }
  
      @Override
      public void setObjectValues(Object... values) {
          if (mValues == null || mValues.length == 0) {
              // No values yet - this animator is being constructed piecemeal. Init the values with
              // whatever the current propertyName is
              if (mProperty != null) {
                  setValues(PropertyValuesHolder.ofObject(mProperty, (TypeEvaluator)null, values));
              } else {
                  setValues(PropertyValuesHolder.ofObject(mPropertyName, (TypeEvaluator)null, values));
              }
          } else {
              super.setObjectValues(values);
          }
      }
  
      @Override
      public void start() {
          if (DBG) {
              Log.d("ObjectAnimator", "Anim target, duration: " + mTarget + ", " + getDuration());
              for (int i = 0; i < mValues.length; ++i) {
                  PropertyValuesHolder pvh = mValues[i];
                  ArrayList<Keyframe> keyframes = pvh.mKeyframeSet.mKeyframes;
                  Log.d("ObjectAnimator", "   Values[" + i + "]: " +
                      pvh.getPropertyName() + ", " + keyframes.get(0).getValue() + ", " +
                      keyframes.get(pvh.mKeyframeSet.mNumKeyframes - 1).getValue());
              }
          }
          super.start();
      }
  
      /**
       * This function is called immediately before processing the first animation
       * frame of an animation. If there is a nonzero <code>startDelay</code>, the
       * function is called after that delay ends.
       * It takes care of the final initialization steps for the
       * animation. This includes setting mEvaluator, if the user has not yet
       * set it up, and the setter/getter methods, if the user did not supply
       * them.
       *
       *  <p>Overriders of this method should call the superclass method to cause
       *  internal mechanisms to be set up correctly.</p>
       */
      @Override
      void initAnimation() {
          if (!mInitialized) {
              // mValueType may change due to setter/getter setup; do this before calling super.init(),
              // which uses mValueType to set up the default type evaluator.
              if ((mProperty == null) && AnimatorProxy.NEEDS_PROXY && (mTarget instanceof View) && PROXY_PROPERTIES.containsKey(mPropertyName)) {
                  setProperty(PROXY_PROPERTIES.get(mPropertyName));
              }
              int numValues = mValues.length;
              for (int i = 0; i < numValues; ++i) {
                  mValues[i].setupSetterAndGetter(mTarget);
              }
              super.initAnimation();
          }
      }
  
      /**
       * Sets the length of the animation. The default duration is 300 milliseconds.
       *
       * @param duration The length of the animation, in milliseconds.
       * @return ObjectAnimator The object called with setDuration(). This return
       * value makes it easier to compose statements together that construct and then set the
       * duration, as in
       * <code>ObjectAnimator.ofInt(target, propertyName, 0, 10).setDuration(500).start()</code>.
       */
      @Override
      public ObjectAnimator setDuration(long duration) {
          super.setDuration(duration);
          return this;
      }
  
  
      /**
       * The target object whose property will be animated by this animation
       *
       * @return The object being animated
       */
      public Object getTarget() {
          return mTarget;
      }
  
      /**
       * Sets the target object whose property will be animated by this animation
       *
       * @param target The object being animated
       */
      @Override
      public void setTarget(Object target) {
          if (mTarget != target) {
              final Object oldTarget = mTarget;
              mTarget = target;
              if (oldTarget != null && target != null && oldTarget.getClass() == target.getClass()) {
                  return;
              }
              // New target type should cause re-initialization prior to starting
              mInitialized = false;
          }
      }
  
      @Override
      public void setupStartValues() {
          initAnimation();
          int numValues = mValues.length;
          for (int i = 0; i < numValues; ++i) {
              mValues[i].setupStartValue(mTarget);
          }
      }
  
      @Override
      public void setupEndValues() {
          initAnimation();
          int numValues = mValues.length;
          for (int i = 0; i < numValues; ++i) {
              mValues[i].setupEndValue(mTarget);
          }
      }
  
      /**
       * This method is called with the elapsed fraction of the animation during every
       * animation frame. This function turns the elapsed fraction into an interpolated fraction
       * and then into an animated value (from the evaluator. The function is called mostly during
       * animation updates, but it is also called when the <code>end()</code>
       * function is called, to set the final value on the property.
       *
       * <p>Overrides of this method must call the superclass to perform the calculation
       * of the animated value.</p>
       *
       * @param fraction The elapsed fraction of the animation.
       */
      @Override
      void animateValue(float fraction) {
          super.animateValue(fraction);
          int numValues = mValues.length;
          for (int i = 0; i < numValues; ++i) {
              mValues[i].setAnimatedValue(mTarget);
          }
      }
  
      @Override
      public ObjectAnimator clone() {
          final ObjectAnimator anim = (ObjectAnimator) super.clone();
          return anim;
      }
  
      @Override
      public String toString() {
          String returnVal = "ObjectAnimator@" + Integer.toHexString(hashCode()) + ", target " +
              mTarget;
          if (mValues != null) {
              for (int i = 0; i < mValues.length; ++i) {
                  returnVal += "\n    " + mValues[i].toString();
              }
          }
          return returnVal;
      }
  }
  