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.cms.CmsException;
  24 import org.argeo.cms.ui.CmsImageManager;
  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 {
  38         private final static Log log = LogFactory.getLog(DefaultImageManager.class);
  39 //      private MimetypesFileTypeMap fileTypeMap = new MimetypesFileTypeMap();
  40
  41         public Boolean load(Node node, Control control, Point preferredSize) throws RepositoryException {
  42                 Point imageSize = getImageSize(node);
  43                 Point size;
  44                 String imgTag = null;
  45                 if (preferredSize == null || imageSize.x == 0 || imageSize.y == 0
  46                                 || (preferredSize.x == 0 && preferredSize.y == 0)) {
  47                         if (imageSize.x != 0 && imageSize.y != 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.x != 0 && preferredSize.y != 0) {
  57                         // given size if completely provided
  58                         size = preferredSize;
  59                 } else {
  60                         // at this stage :
  61                         // image is completely known
  62                         assert imageSize.x != 0 && imageSize.y != 0;
  63                         // one and only one of the dimension as been specified
  64                         assert preferredSize.x == 0 || preferredSize.y == 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(size);
  90                         return loaded;
  91                 } else
  92                         loaded = false;
  93
  94                 return loaded;
  95         }
  96
  97         private Point resizeTo(Point orig, Point constraints) {
  98                 if (constraints.x != 0 && constraints.y != 0) {
  99                         return constraints;
 100                 } else if (constraints.x == 0 && constraints.y == 0) {
 101                         return orig;
 102                 } else if (constraints.y == 0) {// force width
 103                         return new Point(constraints.x, scale(orig.y, orig.x, constraints.x));
 104                 } else if (constraints.x == 0) {// force height
 105                         return new Point(scale(orig.x, orig.y, constraints.y), constraints.y);
 106                 }
 107                 throw new CmsException("Cannot resize " + orig + " to " + constraints);
 108         }
 109
 110         private int scale(int origDimension, int otherDimension, int otherConstraint) {
 111                 return Math.round(origDimension * divide(otherConstraint, otherDimension));
 112         }
 113
 114         private float divide(int a, int b) {
 115                 return ((float) a) / ((float) b);
 116         }
 117
 118         public Point getImageSize(Node node) throws RepositoryException {
 119                 // TODO optimise
 120                 Image image = getSwtImage(node);
 121                 return new Point(image.getBounds().width, image.getBounds().height);
 122         }
 123
 124         /** @return null if not available */
 125         @Override
 126         public String getImageTag(Node node) throws RepositoryException {
 127                 return getImageTag(node, getImageSize(node));
 128         }
 129
 130         private String getImageTag(Node node, Point size) throws RepositoryException {
 131                 StringBuilder buf = getImageTagBuilder(node, size);
 132                 if (buf == null)
 133                         return null;
 134                 return buf.append("/>").toString();
 135         }
 136
 137         /** @return null if not available */
 138         @Override
 139         public StringBuilder getImageTagBuilder(Node node, Point size) throws RepositoryException {
 140                 return getImageTagBuilder(node, Integer.toString(size.x), Integer.toString(size.y));
 141         }
 142
 143         /** @return null if not available */
 144         private StringBuilder getImageTagBuilder(Node node, String width, String height) throws RepositoryException {
 145                 String url = getImageUrl(node);
 146                 if (url == null)
 147                         return null;
 148                 return CmsUiUtils.imgBuilder(url, width, height);
 149         }
 150
 151         /** @return null if not available */
 152         @Override
 153         public String getImageUrl(Node node) throws RepositoryException {
 154                 return CmsUiUtils.getDataPath(node);
 155         }
 156
 157         protected String getResourceName(Node node) throws RepositoryException {
 158                 String workspace = node.getSession().getWorkspace().getName();
 159                 if (node.hasNode(JCR_CONTENT))
 160                         return workspace + '_' + node.getNode(JCR_CONTENT).getIdentifier();
 161                 else
 162                         return workspace + '_' + node.getIdentifier();
 163         }
 164
 165         public Binary getImageBinary(Node node) throws RepositoryException {
 166                 if (node.isNodeType(NT_FILE)) {
 167                         return node.getNode(JCR_CONTENT).getProperty(JCR_DATA).getBinary();
 168                 } else {
 169                         return null;
 170                 }
 171         }
 172
 173         public Image getSwtImage(Node node) throws RepositoryException {
 174                 InputStream inputStream = null;
 175                 Binary binary = getImageBinary(node);
 176                 if (binary == null)
 177                         return null;
 178                 try {
 179                         inputStream = binary.getStream();
 180                         return new Image(Display.getCurrent(), inputStream);
 181                 } finally {
 182                         IOUtils.closeQuietly(inputStream);
 183                         JcrUtils.closeQuietly(binary);
 184                 }
 185         }
 186
 187         @Override
 188         public String uploadImage(Node context, Node parentNode, String fileName, InputStream in, String contentType)
 189                         throws RepositoryException {
 190                 InputStream inputStream = null;
 191                 try {
 192                         String previousResourceName = null;
 193                         if (parentNode.hasNode(fileName)) {
 194                                 Node node = parentNode.getNode(fileName);
 195                                 previousResourceName = getResourceName(node);
 196                                 if (node.hasNode(JCR_CONTENT)) {
 197                                         node.getNode(JCR_CONTENT).remove();
 198                                         node.addNode(JCR_CONTENT, NT_RESOURCE);
 199                                 }
 200                         }
 201
 202                         byte[] arr = IOUtils.toByteArray(in);
 203                         Node fileNode = JcrUtils.copyBytesAsFile(parentNode, fileName, arr);
 204                         inputStream = new ByteArrayInputStream(arr);
 205                         ImageData id = new ImageData(inputStream);
 206                         processNewImageFile(context, fileNode, id);
 207
 208                         String mime = contentType != null ? contentType : Files.probeContentType(Paths.get(fileName));
 209                         if (mime != null) {
 210                                 fileNode.getNode(JCR_CONTENT).setProperty(Property.JCR_MIMETYPE, mime);
 211                         }
 212                         fileNode.getSession().save();
 213
 214                         // reset resource manager
 215                         ResourceManager resourceManager = RWT.getResourceManager();
 216                         if (previousResourceName != null && resourceManager.isRegistered(previousResourceName)) {
 217                                 resourceManager.unregister(previousResourceName);
 218                                 if (log.isDebugEnabled())
 219                                         log.debug("Unregistered image " + previousResourceName);
 220                         }
 221                         return getImageUrl(fileNode);
 222                 } catch (IOException e) {
 223                         throw new CmsException("Cannot upload image " + fileName + " in " + parentNode, e);
 224                 } finally {
 225                         IOUtils.closeQuietly(inputStream);
 226                 }
 227         }
 228
 229         /** Does nothing by default. */
 230         protected void processNewImageFile(Node context, Node fileNode, ImageData id)
 231                         throws RepositoryException, IOException {
 232         }
 233 }