jcr/org.argeo.cms.ui/src/org/argeo/cms/ui/util/DefaultImageManager.java

   1 package org.argeo.cms.ui.util;
   2
   3 import static javax.jcr.Node.JCR_CONTENT;
   4 import static javax.jcr.Property.JCR_DATA;
   5 import static javax.jcr.nodetype.NodeType.NT_FILE;
   6 import static javax.jcr.nodetype.NodeType.NT_RESOURCE;
   7 import static org.argeo.cms.ui.CmsUiConstants.NO_IMAGE_SIZE;
   8
   9 import java.io.ByteArrayInputStream;
  10 import java.io.IOException;
  11 import java.io.InputStream;
  12 import java.nio.file.Files;
  13 import java.nio.file.Paths;
  14
  15 import javax.jcr.Binary;
  16 import javax.jcr.Node;
  17 import javax.jcr.Property;
  18 import javax.jcr.RepositoryException;
  19
  20 import org.apache.commons.io.IOUtils;
  21 import org.argeo.api.cms.CmsLog;
  22 import org.argeo.api.cms.ux.Cms2DSize;
  23 import org.argeo.api.cms.ux.CmsImageManager;
  24 import org.argeo.jcr.JcrException;
  25 import org.argeo.jcr.JcrUtils;
  26 import org.eclipse.rap.rwt.RWT;
  27 import org.eclipse.rap.rwt.service.ResourceManager;
  28 import org.eclipse.rap.rwt.widgets.FileUpload;
  29 import org.eclipse.swt.graphics.Image;
  30 import org.eclipse.swt.graphics.ImageData;
  31 import org.eclipse.swt.graphics.Point;
  32 import org.eclipse.swt.widgets.Control;
  33 import org.eclipse.swt.widgets.Display;
  34 import org.eclipse.swt.widgets.Label;
  35
  36 /** Manages only public images so far. */
  37 public class DefaultImageManager implements CmsImageManager<Control, Node> {
  38         private final static CmsLog log = CmsLog.getLog(DefaultImageManager.class);
  39 //      private MimetypesFileTypeMap fileTypeMap = new MimetypesFileTypeMap();
  40
  41         public Boolean load(Node node, Control control, Cms2DSize preferredSize) {
  42                 Cms2DSize imageSize = getImageSize(node);
  43                 Cms2DSize size;
  44                 String imgTag = null;
  45                 if (preferredSize == null || imageSize.getWidth() == 0 || imageSize.getHeight() == 0
  46                                 || (preferredSize.getWidth() == 0 && preferredSize.getHeight() == 0)) {
  47                         if (imageSize.getWidth() != 0 && imageSize.getHeight() != 0) {
  48                                 // actual image size if completely known
  49                                 size = imageSize;
  50                         } else {
  51                                 // no image if not completely known
  52                                 size = resizeTo(NO_IMAGE_SIZE, preferredSize != null ? preferredSize : imageSize);
  53                                 imgTag = CmsUiUtils.noImg(size);
  54                         }
  55
  56                 } else if (preferredSize.getWidth() != 0 && preferredSize.getHeight() != 0) {
  57                         // given size if completely provided
  58                         size = preferredSize;
  59                 } else {
  60                         // at this stage :
  61                         // image is completely known
  62                         assert imageSize.getWidth() != 0 && imageSize.getHeight() != 0;
  63                         // one and only one of the dimension as been specified
  64                         assert preferredSize.getWidth() == 0 || preferredSize.getHeight() == 0;
  65                         size = resizeTo(imageSize, preferredSize);
  66                 }
  67
  68                 boolean loaded = false;
  69                 if (control == null)
  70                         return loaded;
  71
  72                 if (control instanceof Label) {
  73                         if (imgTag == null) {
  74                                 // IMAGE RETRIEVED HERE
  75                                 imgTag = getImageTag(node, size);
  76                                 //
  77                                 if (imgTag == null)
  78                                         imgTag = CmsUiUtils.noImg(size);
  79                                 else
  80                                         loaded = true;
  81                         }
  82
  83                         Label lbl = (Label) control;
  84                         lbl.setText(imgTag);
  85                         // lbl.setSize(size);
  86                 } else if (control instanceof FileUpload) {
  87                         FileUpload lbl = (FileUpload) control;
  88                         lbl.setImage(CmsUiUtils.noImage(size));
  89                         lbl.setSize(new Point(size.getWidth(), size.getHeight()));
  90                         return loaded;
  91                 } else
  92                         loaded = false;
  93
  94                 return loaded;
  95         }
  96
  97         private Cms2DSize resizeTo(Cms2DSize orig, Cms2DSize constraints) {
  98                 if (constraints.getWidth() != 0 && constraints.getHeight() != 0) {
  99                         return constraints;
 100                 } else if (constraints.getWidth() == 0 && constraints.getHeight() == 0) {
 101                         return orig;
 102                 } else if (constraints.getHeight() == 0) {// force width
 103                         return new Cms2DSize(constraints.getWidth(),
 104                                         scale(orig.getHeight(), orig.getWidth(), constraints.getWidth()));
 105                 } else if (constraints.getWidth() == 0) {// force height
 106                         return new Cms2DSize(scale(orig.getWidth(), orig.getHeight(), constraints.getHeight()),
 107                                         constraints.getHeight());
 108                 }
 109                 throw new IllegalArgumentException("Cannot resize " + orig + " to " + constraints);
 110         }
 111
 112         private int scale(int origDimension, int otherDimension, int otherConstraint) {
 113                 return Math.round(origDimension * divide(otherConstraint, otherDimension));
 114         }
 115
 116         private float divide(int a, int b) {
 117                 return ((float) a) / ((float) b);
 118         }
 119
 120         public Cms2DSize getImageSize(Node node) {
 121                 // TODO optimise
 122                 Image image = getSwtImage(node);
 123                 return new Cms2DSize(image.getBounds().width, image.getBounds().height);
 124         }
 125
 126         /** @return null if not available */
 127         @Override
 128         public String getImageTag(Node node) {
 129                 return getImageTag(node, getImageSize(node));
 130         }
 131
 132         private String getImageTag(Node node, Cms2DSize size) {
 133                 StringBuilder buf = getImageTagBuilder(node, size);
 134                 if (buf == null)
 135                         return null;
 136                 return buf.append("/>").toString();
 137         }
 138
 139         /** @return null if not available */
 140         @Override
 141         public StringBuilder getImageTagBuilder(Node node, Cms2DSize size) {
 142                 return getImageTagBuilder(node, Integer.toString(size.getWidth()), Integer.toString(size.getHeight()));
 143         }
 144
 145         /** @return null if not available */
 146         private StringBuilder getImageTagBuilder(Node node, String width, String height) {
 147                 String url = getImageUrl(node);
 148                 if (url == null)
 149                         return null;
 150                 return CmsUiUtils.imgBuilder(url, width, height);
 151         }
 152
 153         /** @return null if not available */
 154         @Override
 155         public String getImageUrl(Node node) {
 156                 return CmsUiUtils.getDataPathForUrl(node);
 157         }
 158
 159         protected String getResourceName(Node node) {
 160                 try {
 161                         String workspace = node.getSession().getWorkspace().getName();
 162                         if (node.hasNode(JCR_CONTENT))
 163                                 return workspace + '_' + node.getNode(JCR_CONTENT).getIdentifier();
 164                         else
 165                                 return workspace + '_' + node.getIdentifier();
 166                 } catch (RepositoryException e) {
 167                         throw new JcrException(e);
 168                 }
 169         }
 170
 171         public Binary getImageBinary(Node node) {
 172                 try {
 173                         if (node.isNodeType(NT_FILE)) {
 174                                 return node.getNode(JCR_CONTENT).getProperty(JCR_DATA).getBinary();
 175                         } else {
 176                                 return null;
 177                         }
 178                 } catch (RepositoryException e) {
 179                         throw new JcrException(e);
 180                 }
 181         }
 182
 183         public Image getSwtImage(Node node) {
 184                 InputStream inputStream = null;
 185                 Binary binary = getImageBinary(node);
 186                 if (binary == null)
 187                         return null;
 188                 try {
 189                         inputStream = binary.getStream();
 190                         return new Image(Display.getCurrent(), inputStream);
 191                 } catch (RepositoryException e) {
 192                         throw new JcrException(e);
 193                 } finally {
 194                         IOUtils.closeQuietly(inputStream);
 195                         JcrUtils.closeQuietly(binary);
 196                 }
 197         }
 198
 199         @Override
 200         public String uploadImage(Node context, Node parentNode, String fileName, InputStream in, String contentType) {
 201                 InputStream inputStream = null;
 202                 try {
 203                         String previousResourceName = null;
 204                         if (parentNode.hasNode(fileName)) {
 205                                 Node node = parentNode.getNode(fileName);
 206                                 previousResourceName = getResourceName(node);
 207                                 if (node.hasNode(JCR_CONTENT)) {
 208                                         node.getNode(JCR_CONTENT).remove();
 209                                         node.addNode(JCR_CONTENT, NT_RESOURCE);
 210                                 }
 211                         }
 212
 213                         byte[] arr = IOUtils.toByteArray(in);
 214                         Node fileNode = JcrUtils.copyBytesAsFile(parentNode, fileName, arr);
 215                         inputStream = new ByteArrayInputStream(arr);
 216                         ImageData id = new ImageData(inputStream);
 217                         processNewImageFile(context, fileNode, id);
 218
 219                         String mime = contentType != null ? contentType : Files.probeContentType(Paths.get(fileName));
 220                         if (mime != null) {
 221                                 fileNode.getNode(JCR_CONTENT).setProperty(Property.JCR_MIMETYPE, mime);
 222                         }
 223                         fileNode.getSession().save();
 224
 225                         // reset resource manager
 226                         ResourceManager resourceManager = RWT.getResourceManager();
 227                         if (previousResourceName != null && resourceManager.isRegistered(previousResourceName)) {
 228                                 resourceManager.unregister(previousResourceName);
 229                                 if (log.isDebugEnabled())
 230                                         log.debug("Unregistered image " + previousResourceName);
 231                         }
 232                         return CmsUiUtils.getDataPath(fileNode);
 233                 } catch (IOException e) {
 234                         throw new RuntimeException("Cannot upload image " + fileName + " in " + parentNode, e);
 235                 } catch (RepositoryException e) {
 236                         throw new JcrException(e);
 237                 } finally {
 238                         IOUtils.closeQuietly(inputStream);
 239                 }
 240         }
 241
 242         /** Does nothing by default. */
 243         protected void processNewImageFile(Node context, Node fileNode, ImageData id)
 244                         throws RepositoryException, IOException {
 245         }
 246 }