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.CmsConstants.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.apache.commons.logging.Log;
  22 import org.apache.commons.logging.LogFactory;
  23 import org.argeo.api.cms.Cms2DSize;
  24 import org.argeo.api.cms.CmsImageManager;
  25 import org.argeo.jcr.JcrException;
  26 import org.argeo.jcr.JcrUtils;
  27 import org.eclipse.rap.rwt.RWT;
  28 import org.eclipse.rap.rwt.service.ResourceManager;
  29 import org.eclipse.rap.rwt.widgets.FileUpload;
  30 import org.eclipse.swt.graphics.Image;
  31 import org.eclipse.swt.graphics.ImageData;
  32 import org.eclipse.swt.graphics.Point;
  33 import org.eclipse.swt.widgets.Control;
  34 import org.eclipse.swt.widgets.Display;
  35 import org.eclipse.swt.widgets.Label;
  36
  37 /** Manages only public images so far. */
  38 public class DefaultImageManager implements CmsImageManager<Control, Node> {
  39         private final static Log log = LogFactory.getLog(DefaultImageManager.class);
  40 //      private MimetypesFileTypeMap fileTypeMap = new MimetypesFileTypeMap();
  41
  42         public Boolean load(Node node, Control control, Cms2DSize preferredSize) {
  43                 Cms2DSize imageSize = getImageSize(node);
  44                 Cms2DSize size;
  45                 String imgTag = null;
  46                 if (preferredSize == null || imageSize.getWidth() == 0 || imageSize.getHeight() == 0
  47                                 || (preferredSize.getWidth() == 0 && preferredSize.getHeight() == 0)) {
  48                         if (imageSize.getWidth() != 0 && imageSize.getHeight() != 0) {
  49                                 // actual image size if completely known
  50                                 size = imageSize;
  51                         } else {
  52                                 // no image if not completely known
  53                                 size = resizeTo(NO_IMAGE_SIZE, preferredSize != null ? preferredSize : imageSize);
  54                                 imgTag = CmsUiUtils.noImg(size);
  55                         }
  56
  57                 } else if (preferredSize.getWidth() != 0 && preferredSize.getHeight() != 0) {
  58                         // given size if completely provided
  59                         size = preferredSize;
  60                 } else {
  61                         // at this stage :
  62                         // image is completely known
  63                         assert imageSize.getWidth() != 0 && imageSize.getHeight() != 0;
  64                         // one and only one of the dimension as been specified
  65                         assert preferredSize.getWidth() == 0 || preferredSize.getHeight() == 0;
  66                         size = resizeTo(imageSize, preferredSize);
  67                 }
  68
  69                 boolean loaded = false;
  70                 if (control == null)
  71                         return loaded;
  72
  73                 if (control instanceof Label) {
  74                         if (imgTag == null) {
  75                                 // IMAGE RETRIEVED HERE
  76                                 imgTag = getImageTag(node, size);
  77                                 //
  78                                 if (imgTag == null)
  79                                         imgTag = CmsUiUtils.noImg(size);
  80                                 else
  81                                         loaded = true;
  82                         }
  83
  84                         Label lbl = (Label) control;
  85                         lbl.setText(imgTag);
  86                         // lbl.setSize(size);
  87                 } else if (control instanceof FileUpload) {
  88                         FileUpload lbl = (FileUpload) control;
  89                         lbl.setImage(CmsUiUtils.noImage(size));
  90                         lbl.setSize(new Point(size.getWidth(), size.getHeight()));
  91                         return loaded;
  92                 } else
  93                         loaded = false;
  94
  95                 return loaded;
  96         }
  97
  98         private Cms2DSize resizeTo(Cms2DSize orig, Cms2DSize constraints) {
  99                 if (constraints.getWidth() != 0 && constraints.getHeight() != 0) {
 100                         return constraints;
 101                 } else if (constraints.getWidth() == 0 && constraints.getHeight() == 0) {
 102                         return orig;
 103                 } else if (constraints.getHeight() == 0) {// force width
 104                         return new Cms2DSize(constraints.getWidth(),
 105                                         scale(orig.getHeight(), orig.getWidth(), constraints.getWidth()));
 106                 } else if (constraints.getWidth() == 0) {// force height
 107                         return new Cms2DSize(scale(orig.getWidth(), orig.getHeight(), constraints.getHeight()),
 108                                         constraints.getHeight());
 109                 }
 110                 throw new IllegalArgumentException("Cannot resize " + orig + " to " + constraints);
 111         }
 112
 113         private int scale(int origDimension, int otherDimension, int otherConstraint) {
 114                 return Math.round(origDimension * divide(otherConstraint, otherDimension));
 115         }
 116
 117         private float divide(int a, int b) {
 118                 return ((float) a) / ((float) b);
 119         }
 120
 121         public Cms2DSize getImageSize(Node node) {
 122                 // TODO optimise
 123                 Image image = getSwtImage(node);
 124                 return new Cms2DSize(image.getBounds().width, image.getBounds().height);
 125         }
 126
 127         /** @return null if not available */
 128         @Override
 129         public String getImageTag(Node node) {
 130                 return getImageTag(node, getImageSize(node));
 131         }
 132
 133         private String getImageTag(Node node, Cms2DSize size) {
 134                 StringBuilder buf = getImageTagBuilder(node, size);
 135                 if (buf == null)
 136                         return null;
 137                 return buf.append("/>").toString();
 138         }
 139
 140         /** @return null if not available */
 141         @Override
 142         public StringBuilder getImageTagBuilder(Node node, Cms2DSize size) {
 143                 return getImageTagBuilder(node, Integer.toString(size.getWidth()), Integer.toString(size.getHeight()));
 144         }
 145
 146         /** @return null if not available */
 147         private StringBuilder getImageTagBuilder(Node node, String width, String height) {
 148                 String url = getImageUrl(node);
 149                 if (url == null)
 150                         return null;
 151                 return CmsUiUtils.imgBuilder(url, width, height);
 152         }
 153
 154         /** @return null if not available */
 155         @Override
 156         public String getImageUrl(Node node) {
 157                 return CmsUiUtils.getDataPathForUrl(node);
 158         }
 159
 160         protected String getResourceName(Node node) {
 161                 try {
 162                         String workspace = node.getSession().getWorkspace().getName();
 163                         if (node.hasNode(JCR_CONTENT))
 164                                 return workspace + '_' + node.getNode(JCR_CONTENT).getIdentifier();
 165                         else
 166                                 return workspace + '_' + node.getIdentifier();
 167                 } catch (RepositoryException e) {
 168                         throw new JcrException(e);
 169                 }
 170         }
 171
 172         public Binary getImageBinary(Node node) {
 173                 try {
 174                         if (node.isNodeType(NT_FILE)) {
 175                                 return node.getNode(JCR_CONTENT).getProperty(JCR_DATA).getBinary();
 176                         } else {
 177                                 return null;
 178                         }
 179                 } catch (RepositoryException e) {
 180                         throw new JcrException(e);
 181                 }
 182         }
 183
 184         public Image getSwtImage(Node node) {
 185                 InputStream inputStream = null;
 186                 Binary binary = getImageBinary(node);
 187                 if (binary == null)
 188                         return null;
 189                 try {
 190                         inputStream = binary.getStream();
 191                         return new Image(Display.getCurrent(), inputStream);
 192                 } catch (RepositoryException e) {
 193                         throw new JcrException(e);
 194                 } finally {
 195                         IOUtils.closeQuietly(inputStream);
 196                         JcrUtils.closeQuietly(binary);
 197                 }
 198         }
 199
 200         @Override
 201         public String uploadImage(Node context, Node parentNode, String fileName, InputStream in, String contentType) {
 202                 InputStream inputStream = null;
 203                 try {
 204                         String previousResourceName = null;
 205                         if (parentNode.hasNode(fileName)) {
 206                                 Node node = parentNode.getNode(fileName);
 207                                 previousResourceName = getResourceName(node);
 208                                 if (node.hasNode(JCR_CONTENT)) {
 209                                         node.getNode(JCR_CONTENT).remove();
 210                                         node.addNode(JCR_CONTENT, NT_RESOURCE);
 211                                 }
 212                         }
 213
 214                         byte[] arr = IOUtils.toByteArray(in);
 215                         Node fileNode = JcrUtils.copyBytesAsFile(parentNode, fileName, arr);
 216                         inputStream = new ByteArrayInputStream(arr);
 217                         ImageData id = new ImageData(inputStream);
 218                         processNewImageFile(context, fileNode, id);
 219
 220                         String mime = contentType != null ? contentType : Files.probeContentType(Paths.get(fileName));
 221                         if (mime != null) {
 222                                 fileNode.getNode(JCR_CONTENT).setProperty(Property.JCR_MIMETYPE, mime);
 223                         }
 224                         fileNode.getSession().save();
 225
 226                         // reset resource manager
 227                         ResourceManager resourceManager = RWT.getResourceManager();
 228                         if (previousResourceName != null && resourceManager.isRegistered(previousResourceName)) {
 229                                 resourceManager.unregister(previousResourceName);
 230                                 if (log.isDebugEnabled())
 231                                         log.debug("Unregistered image " + previousResourceName);
 232                         }
 233                         return CmsUiUtils.getDataPath(fileNode);
 234                 } catch (IOException e) {
 235                         throw new RuntimeException("Cannot upload image " + fileName + " in " + parentNode, e);
 236                 } catch (RepositoryException e) {
 237                         throw new JcrException(e);
 238                 } finally {
 239                         IOUtils.closeQuietly(inputStream);
 240                 }
 241         }
 242
 243         /** Does nothing by default. */
 244         protected void processNewImageFile(Node context, Node fileNode, ImageData id)
 245                         throws RepositoryException, IOException {
 246         }
 247 }