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

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