content: /*******************************************************************************
   * Copyright 2013 Sergey Tarasevich
   *
   * 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.nostra13.universalimageloader.core.imageaware;
  
  import android.graphics.Bitmap;
  import android.graphics.drawable.Drawable;
  import android.view.View;
  import android.widget.ImageView;
  import com.nostra13.universalimageloader.core.assist.ViewScaleType;
  import com.nostra13.universalimageloader.utils.L;
  
  import java.lang.reflect.Field;
  
  /**
   * Wrapper for Android {@link android.widget.ImageView ImageView}. Keeps weak reference of ImageView to prevent memory
   * leaks.
   *
   * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
   * @since 1.9.0
   */
  public class ImageViewAware extends ViewAware {
  
  	/**
  	 * Constructor. <br />
  	 * References {@link #ImageViewAware(android.widget.ImageView, boolean) ImageViewAware(imageView, true)}.
  	 *
  	 * @param imageView {@link android.widget.ImageView ImageView} to work with
  	 */
  	public ImageViewAware(ImageView imageView) {
  		super(imageView);
  	}
  
  	/**
  	 * Constructor
  	 *
  	 * @param imageView           {@link android.widget.ImageView ImageView} to work with
  	 * @param checkActualViewSize <b>true</b> - then {@link #getWidth()} and {@link #getHeight()} will check actual
  	 *                            size of ImageView. It can cause known issues like
  	 *                            <a href="https://github.com/nostra13/Android-Universal-Image-Loader/issues/376">this</a>.
  	 *                            But it helps to save memory because memory cache keeps bitmaps of actual (less in
  	 *                            general) size.
  	 *                            <p/>
  	 *                            <b>false</b> - then {@link #getWidth()} and {@link #getHeight()} will <b>NOT</b>
  	 *                            consider actual size of ImageView, just layout parameters. <br /> If you set 'false'
  	 *                            it's recommended 'android:layout_width' and 'android:layout_height' (or
  	 *                            'android:maxWidth' and 'android:maxHeight') are set with concrete values. It helps to
  	 *                            save memory.
  	 *                            <p/>
  	 */
  	public ImageViewAware(ImageView imageView, boolean checkActualViewSize) {
  		super(imageView, checkActualViewSize);
  	}
  
  	/**
  	 * {@inheritDoc}
  	 * <br />
  	 * 3) Get <b>maxWidth</b>.
  	 */
  	@Override
  	public int getWidth() {
  		int width = super.getWidth();
  		if (width <= 0) {
  			ImageView imageView = (ImageView) viewRef.get();
  			if (imageView != null) {
  				width = getImageViewFieldValue(imageView, "mMaxWidth"); // Check maxWidth parameter
  			}
  		}
  		return width;
  	}
  
  	/**
  	 * {@inheritDoc}
  	 * <br />
  	 * 3) Get <b>maxHeight</b>
  	 */
  	@Override
  	public int getHeight() {
  		int height = super.getHeight();
  		if (height <= 0) {
  			ImageView imageView = (ImageView) viewRef.get();
  			if (imageView != null) {
  				height = getImageViewFieldValue(imageView, "mMaxHeight"); // Check maxHeight parameter
  			}
  		}
  		return height;
  	}
  
  	@Override
  	public ViewScaleType getScaleType() {
  		ImageView imageView = (ImageView) viewRef.get();
  		if (imageView != null) {
  			return ViewScaleType.fromImageView(imageView);
  		}
  		return super.getScaleType();
  	}
  
  	@Override
  	public ImageView getWrappedView() {
  		return (ImageView) super.getWrappedView();
  	}
  
  	@Override
  	protected void setImageDrawableInto(Drawable drawable, View view) {
  		((ImageView) view).setImageDrawable(drawable);
  	}
  
  	@Override
  	protected void setImageBitmapInto(Bitmap bitmap, View view) {
  		((ImageView) view).setImageBitmap(bitmap);
  	}
  
  	private static int getImageViewFieldValue(Object object, String fieldName) {
  		int value = 0;
  		try {
  			Field field = ImageView.class.getDeclaredField(fieldName);
  			field.setAccessible(true);
  			int fieldValue = (Integer) field.get(object);
  			if (fieldValue > 0 && fieldValue < Integer.MAX_VALUE) {
  				value = fieldValue;
  			}
  		} catch (Exception e) {
  			L.e(e);
  		}
  		return value;
  	}
  }
  