eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/media/MediaViewLabelProvider.java

   1 /**
   2 * Copyright (C) 2017 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9 package eu.etaxonomy.taxeditor.editor.view.media;
  10
  11 import java.io.InputStream;
  12 import java.util.List;
  13 import java.util.Set;
  14
  15 import org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.IStyledLabelProvider;
  16 import org.eclipse.jface.viewers.LabelProvider;
  17 import org.eclipse.jface.viewers.StyledString;
  18 import org.eclipse.swt.SWT;
  19 import org.eclipse.swt.graphics.GC;
  20 import org.eclipse.swt.graphics.Image;
  21 import org.eclipse.swt.widgets.Display;
  22
  23 import eu.etaxonomy.cdm.common.URI;
  24 import eu.etaxonomy.cdm.common.UriUtils;
  25 import eu.etaxonomy.cdm.model.common.IdentifiableEntity;
  26 import eu.etaxonomy.cdm.model.media.Media;
  27 import eu.etaxonomy.cdm.model.media.MediaRepresentation;
  28 import eu.etaxonomy.cdm.model.media.MediaRepresentationPart;
  29 import eu.etaxonomy.cdm.model.media.MediaUtils;
  30 import eu.etaxonomy.taxeditor.preference.PreferencesUtil;
  31
  32 /**
  33  * @author k.luther
  34  * @date 11.10.2017
  35  */
  36 public class MediaViewLabelProvider extends LabelProvider implements IStyledLabelProvider {
  37
  38     /**
  39      * {@inheritDoc}
  40      */
  41     @Override
  42     public String getText(Object element) {
  43         return getStyledText(element).getString();
  44     }
  45
  46     @Override
  47     public StyledString getStyledText(Object element) {
  48         if (element instanceof IdentifiableEntity) {
  49             IdentifiableEntity<?> identifiableEntity= (IdentifiableEntity<?>) element;
  50             if(identifiableEntity.getId()==0){
  51                 return new StyledString(identifiableEntity.generateTitle());
  52             }
  53             else{
  54                 return new StyledString(identifiableEntity.getTitleCache());
  55             }
  56         }
  57         return null;
  58     }
  59
  60     @Override
  61     public Image getImage(Object element) {
  62         Image image = null;
  63         int scale = 50;
  64         if (element instanceof Media && PreferencesUtil.isShowMediaPreview()){
  65             Set<MediaRepresentation> representations = ((Media)element).getRepresentations();
  66             if(representations.iterator().hasNext()){
  67                 MediaRepresentation rep = null;
  68
  69                 MediaRepresentationPart smallestPart = null;
  70                 rep = MediaUtils.findBestMatchingRepresentation((Media)element, null, null, scale, scale, null, MediaUtils.MissingValueStrategy.MAX);
  71                 List<MediaRepresentationPart> parts = rep.getParts();
  72                 for (MediaRepresentationPart part: parts){
  73                     if (smallestPart != null){
  74                         if (smallestPart.getSize() != null && part.getSize() != null) {
  75                             if (smallestPart.getSize() > part.getSize()){
  76                                 smallestPart = part;
  77                             }
  78                         }
  79                     }else{
  80                         smallestPart = part;
  81                     }
  82
  83                 }
  84                 if (smallestPart != null){
  85                     URI uri = smallestPart.getUri();
  86                     if (uri == null){
  87                         return null;
  88                     }
  89                     InputStream imageStream;
  90                     try {
  91                         imageStream = UriUtils.getInputStream(uri);
  92                         image = new Image(Display.getCurrent(), imageStream);
  93                         int height = image.getBounds().height;
  94                         int width = image.getBounds().width;
  95
  96                         if (height>width){
  97                             width = width/(height/scale);
  98                             height = scale;
  99                         }else{
 100                             height = height/(width/scale);
 101                             width = scale;
 102                         }
 103                         Image scaled = new Image(Display.getDefault(), scale, scale);
 104
 105                         GC gc = new GC(scaled);
 106                         gc.setAntialias(SWT.ON);
 107                         gc.setInterpolation(SWT.HIGH);
 108
 109
 110                         gc.drawImage(image, 0, 0,
 111                         image.getBounds().width, image.getBounds().height,
 112                         0, 0, width, height);
 113
 114                         gc.dispose();
 115                         image.dispose(); // don't forget about me!
 116                         return scaled;
 117
 118                     } catch (Exception e) {
 119                         // TODO Auto-generated catch block
 120                        return null;
 121                     }
 122
 123                 }else{
 124                     return null;
 125                 }
 126
 127             }
 128
 129         }
 130         return image;
 131     }
 132
 133     @Override
 134     public void dispose() {
 135         // garbage collection system resources
 136
 137     }
 138
 139
 140
 141 }