eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/ui/section/media/MediaDetailElement.java

   1 /**
   2 * Copyright (C) 2014 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.ui.section.media;
  10
  11 import java.net.URI;
  12 import java.util.List;
  13 import java.util.Set;
  14
  15 import org.apache.sanselan.ImageReadException;
  16 import org.eclipse.swt.SWT;
  17 import org.eclipse.swt.widgets.Label;
  18
  19 import eu.etaxonomy.cdm.common.UriUtils;
  20 import eu.etaxonomy.cdm.common.media.ImageInfo;
  21 import eu.etaxonomy.cdm.model.common.CdmBase;
  22 import eu.etaxonomy.cdm.model.media.ImageFile;
  23 import eu.etaxonomy.cdm.model.media.Media;
  24 import eu.etaxonomy.cdm.model.media.MediaRepresentation;
  25 import eu.etaxonomy.cdm.model.media.MediaRepresentationPart;
  26 import eu.etaxonomy.cdm.model.media.MediaUtils;
  27 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  28 import eu.etaxonomy.taxeditor.preference.IPreferenceKeys;
  29 import eu.etaxonomy.taxeditor.preference.PreferencesUtil;
  30 import eu.etaxonomy.taxeditor.store.StoreUtil;
  31 import eu.etaxonomy.taxeditor.ui.element.CdmFormFactory;
  32 import eu.etaxonomy.taxeditor.ui.element.ICdmFormElement;
  33 import eu.etaxonomy.taxeditor.ui.element.ImageElement;
  34 import eu.etaxonomy.taxeditor.ui.element.LayoutConstants;
  35 import eu.etaxonomy.taxeditor.ui.element.UriWithLabelElement;
  36 import eu.etaxonomy.taxeditor.ui.section.AbstractCdmDetailElement;
  37
  38 /**
  39  * @author pplitzner
  40  * @date 25.08.2014
  41  *
  42  */
  43 public class MediaDetailElement extends AbstractCdmDetailElement<Media>{
  44
  45     private UriWithLabelElement textUri;
  46     private MediaRepresentationSection section_mediaRepresentation;
  47
  48     private boolean isAdvancedMediaView;
  49     private MediaRepresentationPart singleMediaRepresentationPart;
  50     private ICdmFormElement parentFormElement;
  51     private int style;
  52
  53     /**
  54      * Used to store the URI even if it is invalid and thus cannot be stored in CDM
  55      */
  56     private String uriBuffer;
  57     private ImageElement element_image;
  58     private Label lblNoImage;
  59
  60     public MediaDetailElement(CdmFormFactory formFactory, ICdmFormElement formElement) {
  61         super(formFactory, formElement);
  62     }
  63
  64     @Override
  65     protected void createControls(ICdmFormElement formElement, Media entity, int style) {
  66
  67         this.parentFormElement = formElement;
  68         this.style = style;
  69
  70     }
  71
  72     @Override
  73     public void setEntity(Media entity) {
  74         super.setEntity(entity);
  75         if(singleMediaRepresentationPart==null){
  76             singleMediaRepresentationPart = MediaUtils.initFirstMediaRepresentationPart(entity, true);
  77         }
  78         initIsAdvancedMediaView();
  79         showAdvancedView();
  80     }
  81
  82     @Override
  83     public void handleEvent(Object eventSource){
  84         if(eventSource==textUri){
  85             textUri.setBackground(getPersistentBackground());
  86             URI uri = textUri.parseText();
  87             singleMediaRepresentationPart.setUri(uri);
  88             if(uri==null){
  89                 uriBuffer=textUri.getText();
  90             }
  91             else{
  92                 createImageElement(uri);
  93             }
  94         }
  95     }
  96
  97     private void createImageElement(URI uri) {
  98         ImageInfo imageInfo;
  99         try {
 100             if(uri == null){
 101                 return;
 102             }
 103             //first check if uri refers to an actual (non-image) file
 104             UriUtils.getInputStream(uri);// will fail with a FileNotFoundException if not
 105             imageInfo = ImageInfo.NewInstance(uri, 10000);//will fail when it is no image file
 106             singleMediaRepresentationPart.setSize((int) imageInfo.getLength());
 107             if(singleMediaRepresentationPart.isInstanceOf(ImageFile.class)){
 108                 ImageFile image = CdmBase.deproxy(singleMediaRepresentationPart, ImageFile.class);
 109                 image.setHeight(imageInfo.getHeight());
 110                 image.setWidth(imageInfo.getWidth());
 111             }
 112             singleMediaRepresentationPart.getMediaRepresentation().setMimeType(imageInfo.getMimeType());
 113             singleMediaRepresentationPart.getMediaRepresentation().setSuffix(imageInfo.getSuffix());
 114             element_image = formFactory.createImageElement(parentFormElement, uri, style);
 115             element_image.initImageUri(uri);
 116             element_image.loadImage();
 117                 disposeErrorLabel();
 118         } catch (Exception e){
 119                 if(e.getCause()!=null && e.getCause().getClass().equals(ImageReadException.class)){
 120                         disposeErrorLabel();
 121                         handleException(uri, "No preview available for this file type");
 122                 }
 123                 else{
 124                         disposeErrorLabel();
 125                         handleException(uri, "No file found");
 126                 }
 127         }
 128     }
 129
 130         private void disposeErrorLabel() {
 131                 if(lblNoImage!=null){
 132                     lblNoImage.dispose();
 133                 }
 134                 lblNoImage = null;
 135         }
 136
 137     public void toggleAdvancedMediaView() {
 138         if (getEntity().getRepresentations() != null
 139                 && (getEntity().getRepresentations().size() > 1 ||
 140                         (getEntity().getRepresentations().size() == 1
 141                         && getEntity().getRepresentations().iterator().next().getParts().size() > 1))) {
 142             MessagingUtils.informationDialog("Toggling not possible",
 143                     "Media consists of multiple representations or representatio parts");
 144             // toggling is only possible if there are no more than one
 145             // MediaRepresentation resp. MediaRepresentationParts
 146             return;
 147         }
 148         isAdvancedMediaView = !isAdvancedMediaView;
 149         showAdvancedView();
 150         StoreUtil.reflowParentScrolledForm(getLayoutComposite(), true);
 151     }
 152
 153     private void showAdvancedView() {
 154
 155         if(isAdvancedMediaView){
 156             if(textUri!=null){
 157                 removeElementsAndControls(textUri);
 158             }
 159             if(element_image!=null){
 160                 element_image.dispose();
 161                 element_image = null;
 162             }
 163             section_mediaRepresentation = formFactory.createMediaRepresentationSection(getConversationHolder(), parentFormElement, StoreUtil.getSectionStyle(MediaRepresentationSection.class, getEntity().getClass().getCanonicalName()));
 164             section_mediaRepresentation.setLayoutData(LayoutConstants.FILL_HORIZONTALLY(2, 1));
 165             section_mediaRepresentation.setEntity(getEntity());
 166             //set buffered uri as text if uri had parsing problems in simple view
 167             if(uriBuffer!=null){
 168                 section_mediaRepresentation.getLayoutComposite().getChildren();
 169             }
 170         }
 171         else{
 172             if(section_mediaRepresentation!=null){
 173                 removeElementsAndControls(section_mediaRepresentation);
 174             }
 175             textUri = formFactory.createUriWithLabelElement(parentFormElement, "Media URI", null, style);
 176             URI uri = singleMediaRepresentationPart.getUri();
 177             textUri.setParsedText(uri);
 178             //set buffered uri as text if uri had parsing problems in advanced view
 179             if(uri==null && uriBuffer!=null){
 180                 textUri.setText(uriBuffer);
 181                 textUri.parseText();
 182             }
 183             textUri.getLayoutComposite().layout();
 184
 185             createImageElement(singleMediaRepresentationPart.getUri());
 186         }
 187     }
 188
 189     private void initIsAdvancedMediaView(){
 190         if(PreferencesUtil.getBooleanValue(IPreferenceKeys.SHOW_ADVANCED_MEDIA_SECTION)){
 191             isAdvancedMediaView = true;
 192             return;
 193         }
 194         Set<MediaRepresentation> representations = getEntity().getRepresentations();
 195         if(representations.size()>1){
 196             isAdvancedMediaView = true;
 197             return;
 198         }
 199         if(representations.size()==1){
 200             List<MediaRepresentationPart> parts = representations.iterator().next().getParts();
 201             if(parts.size()>1){
 202                 isAdvancedMediaView =  true;
 203                 return;
 204             }
 205         }
 206         isAdvancedMediaView =  false;
 207     }
 208
 209     private void handleException(URI uri, String labelText) {
 210         if(element_image!=null){
 211             element_image.unloadImage();
 212             element_image.loadImage();
 213             element_image.dispose();
 214         }
 215         if(lblNoImage==null){
 216                         lblNoImage = formFactory.createLabel(getLayoutComposite(), labelText);
 217             lblNoImage.setLayoutData(LayoutConstants.FILL_HORIZONTALLY(2, 1));
 218             lblNoImage.setAlignment(SWT.CENTER);
 219         }
 220     }
 221
 222     public boolean isAdvancedMediaView() {
 223         return isAdvancedMediaView;
 224     }
 225
 226     public void setUriBuffer(String uriBuffer) {
 227         this.uriBuffer = uriBuffer;
 228     }
 229
 230     public String getUriBuffer() {
 231         return uriBuffer;
 232     }
 233
 234 }