content: /*
   * Copyright 2015 Google Inc.
   *
   * 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.agenthun.readingroutine.utils;
  
  import android.graphics.Color;
  import android.graphics.drawable.ColorDrawable;
  import android.graphics.drawable.Drawable;
  import android.support.v4.view.ViewCompat;
  import android.transition.ChangeBounds;
  import android.util.Property;
  import android.util.TypedValue;
  import android.view.View;
  import android.widget.FrameLayout;
  import android.widget.TextView;
  
  public class ViewUtils {
  
      private ViewUtils() {
          //no instance
      }
  
      public static final Property<FrameLayout, Integer> FOREGROUND_COLOR =
              new IntProperty<FrameLayout>("foregroundColor") {
  
                  @Override
                  public void setValue(FrameLayout layout, int value) {
                      if (layout.getForeground() instanceof ColorDrawable) {
                          ((ColorDrawable) layout.getForeground().mutate()).setColor(value);
                      } else {
                          layout.setForeground(new ColorDrawable(value));
                      }
                  }
  
                  @Override
                  public Integer get(FrameLayout layout) {
                      if (layout.getForeground() instanceof ColorDrawable) {
                          return ((ColorDrawable) layout.getForeground()).getColor();
                      } else {
                          return Color.TRANSPARENT;
                      }
                  }
              };
  
      public static final Property<View, Integer> BACKGROUND_COLOR =
              new IntProperty<View>("backgroundColor") {
  
                  @Override
                  public void setValue(View view, int value) {
                      view.setBackgroundColor(value);
                  }
  
                  @Override
                  public Integer get(View view) {
                      Drawable d = view.getBackground();
                      if (d instanceof ColorDrawable) {
                          return ((ColorDrawable) d).getColor();
                      }
                      return Color.TRANSPARENT;
                  }
              };
  
      /**
       * Allows changes to the text size in transitions and animations.
       * Using this with something else than {@link ChangeBounds}
       * can result in a severe performance penalty due to layout passes.
       */
      public static final Property<TextView, Float> PROPERTY_TEXT_SIZE =
              new FloatProperty<TextView>("textSize") {
                  @Override
                  public Float get(TextView view) {
                      return view.getTextSize();
                  }
  
                  @Override
                  public void setValue(TextView view, float textSize) {
                      view.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
                  }
              };
  
      /**
       * Allows making changes to the start padding of a view.
       * Using this with something else than {@link ChangeBounds}
       * can result in a severe performance penalty due to layout passes.
       */
      public static final Property<TextView, Integer> PROPERTY_TEXT_PADDING_START =
              new IntProperty<TextView>("paddingStart") {
                  @Override
                  public Integer get(TextView view) {
                      return ViewCompat.getPaddingStart(view);
                  }
  
                  @Override
                  public void setValue(TextView view, int paddingStart) {
                      ViewCompat.setPaddingRelative(view, paddingStart, view.getPaddingTop(),
                              ViewCompat.getPaddingEnd(view), view.getPaddingBottom());
                  }
              };
  
      public static abstract class IntProperty<T> extends Property<T, Integer> {
  
          public IntProperty(String name) {
              super(Integer.class, name);
          }
  
          /**
           * A type-specific override of the {@link #set(Object, Integer)} that is faster when
           * dealing
           * with fields of type <code>int</code>.
           */
          public abstract void setValue(T object, int value);
  
          @Override
          final public void set(T object, Integer value) {
              //noinspection UnnecessaryUnboxing
              setValue(object, value.intValue());
          }
      }
  
      public static abstract class FloatProperty<T> extends Property<T, Float> {
  
          public FloatProperty(String name) {
              super(Float.class, name);
          }
  
          /**
           * A type-specific override of the {@link #set(Object, Float)} that is faster when dealing
           * with fields of type <code>int</code>.
           */
          public abstract void setValue(T object, float value);
  
          @Override
          final public void set(T object, Float value) {
              //noinspection UnnecessaryUnboxing
              setValue(object, value.floatValue());
          }
      }
  
      public static void setPaddingStart(TextView target, int paddingStart) {
          ViewCompat.setPaddingRelative(target, paddingStart, target.getPaddingTop(),
                  ViewCompat.getPaddingEnd(target), target.getPaddingBottom());
      }
  
  }
  