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