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

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