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.net.MalformedURLException;
  13 import java.net.URL;
  14 import java.nio.file.Files;
  15 import java.nio.file.Paths;
  16
  17 import javax.jcr.Binary;
  18 import javax.jcr.Node;
  19 import javax.jcr.Property;
  20 import javax.jcr.RepositoryException;
  21
  22 import org.apache.commons.io.IOUtils;
  23 import org.apache.commons.logging.Log;
  24 import org.apache.commons.logging.LogFactory;
  25 import org.argeo.cms.ui.CmsImageManager;
  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 {
  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, Point preferredSize) throws RepositoryException {
  43                 Point imageSize = getImageSize(node);
  44                 Point size;
  45                 String imgTag = null;
  46                 if (preferredSize == null || imageSize.x == 0 || imageSize.y == 0
  47                                 || (preferredSize.x == 0 && preferredSize.y == 0)) {
  48                         if (imageSize.x != 0 && imageSize.y != 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.x != 0 && preferredSize.y != 0) {
  58                         // given size if completely provided
  59                         size = preferredSize;
  60                 } else {
  61                         // at this stage :
  62                         // image is completely known
  63                         assert imageSize.x != 0 && imageSize.y != 0;
  64                         // one and only one of the dimension as been specified
  65                         assert preferredSize.x == 0 || preferredSize.y == 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(size);
  91                         return loaded;
  92                 } else
  93                         loaded = false;
  94
  95                 return loaded;
  96         }
  97
  98         private Point resizeTo(Point orig, Point constraints) {
  99                 if (constraints.x != 0 && constraints.y != 0) {
 100                         return constraints;
 101                 } else if (constraints.x == 0 && constraints.y == 0) {
 102                         return orig;
 103                 } else if (constraints.y == 0) {// force width
 104                         return new Point(constraints.x, scale(orig.y, orig.x, constraints.x));
 105                 } else if (constraints.x == 0) {// force height
 106                         return new Point(scale(orig.x, orig.y, constraints.y), constraints.y);
 107                 }
 108                 throw new IllegalArgumentException("Cannot resize " + orig + " to " + constraints);
 109         }
 110
 111         private int scale(int origDimension, int otherDimension, int otherConstraint) {
 112                 return Math.round(origDimension * divide(otherConstraint, otherDimension));
 113         }
 114
 115         private float divide(int a, int b) {
 116                 return ((float) a) / ((float) b);
 117         }
 118
 119         public Point getImageSize(Node node) throws RepositoryException {
 120                 // TODO optimise
 121                 Image image = getSwtImage(node);
 122                 return new Point(image.getBounds().width, image.getBounds().height);
 123         }
 124
 125         /** @return null if not available */
 126         @Override
 127         public String getImageTag(Node node) throws RepositoryException {
 128                 return getImageTag(node, getImageSize(node));
 129         }
 130
 131         private String getImageTag(Node node, Point size) throws RepositoryException {
 132                 StringBuilder buf = getImageTagBuilder(node, size);
 133                 if (buf == null)
 134                         return null;
 135                 return buf.append("/>").toString();
 136         }
 137
 138         /** @return null if not available */
 139         @Override
 140         public StringBuilder getImageTagBuilder(Node node, Point size) throws RepositoryException {
 141                 return getImageTagBuilder(node, Integer.toString(size.x), Integer.toString(size.y));
 142         }
 143
 144         /** @return null if not available */
 145         private StringBuilder getImageTagBuilder(Node node, String width, String height) throws RepositoryException {
 146                 String url = getImageUrl(node);
 147                 if (url == null)
 148                         return null;
 149                 return CmsUiUtils.imgBuilder(url, width, height);
 150         }
 151
 152         /** @return null if not available */
 153         @Override
 154         public String getImageUrl(Node node) throws RepositoryException {
 155                 return CmsUiUtils.getDataPathForUrl(node);
 156         }
 157
 158         protected String getResourceName(Node node) throws RepositoryException {
 159                 String workspace = node.getSession().getWorkspace().getName();
 160                 if (node.hasNode(JCR_CONTENT))
 161                         return workspace + '_' + node.getNode(JCR_CONTENT).getIdentifier();
 162                 else
 163                         return workspace + '_' + node.getIdentifier();
 164         }
 165
 166         public Binary getImageBinary(Node node) throws RepositoryException {
 167                 if (node.isNodeType(NT_FILE)) {
 168                         return node.getNode(JCR_CONTENT).getProperty(JCR_DATA).getBinary();
 169                 } else {
 170                         return null;
 171                 }
 172         }
 173
 174         public Image getSwtImage(Node node) throws RepositoryException {
 175                 InputStream inputStream = null;
 176                 Binary binary = getImageBinary(node);
 177                 if (binary == null)
 178                         return null;
 179                 try {
 180                         inputStream = binary.getStream();
 181                         return new Image(Display.getCurrent(), inputStream);
 182                 } finally {
 183                         IOUtils.closeQuietly(inputStream);
 184                         JcrUtils.closeQuietly(binary);
 185                 }
 186         }
 187
 188         @Override
 189         public String uploadImage(Node context, Node parentNode, String fileName, InputStream in, String contentType)
 190                         throws RepositoryException {
 191                 InputStream inputStream = null;
 192                 try {
 193                         String previousResourceName = null;
 194                         if (parentNode.hasNode(fileName)) {
 195                                 Node node = parentNode.getNode(fileName);
 196                                 previousResourceName = getResourceName(node);
 197                                 if (node.hasNode(JCR_CONTENT)) {
 198                                         node.getNode(JCR_CONTENT).remove();
 199                                         node.addNode(JCR_CONTENT, NT_RESOURCE);
 200                                 }
 201                         }
 202
 203                         byte[] arr = IOUtils.toByteArray(in);
 204                         Node fileNode = JcrUtils.copyBytesAsFile(parentNode, fileName, arr);
 205                         inputStream = new ByteArrayInputStream(arr);
 206                         ImageData id = new ImageData(inputStream);
 207                         processNewImageFile(context, fileNode, id);
 208
 209                         String mime = contentType != null ? contentType : Files.probeContentType(Paths.get(fileName));
 210                         if (mime != null) {
 211                                 fileNode.getNode(JCR_CONTENT).setProperty(Property.JCR_MIMETYPE, mime);
 212                         }
 213                         fileNode.getSession().save();
 214
 215                         // reset resource manager
 216                         ResourceManager resourceManager = RWT.getResourceManager();
 217                         if (previousResourceName != null && resourceManager.isRegistered(previousResourceName)) {
 218                                 resourceManager.unregister(previousResourceName);
 219                                 if (log.isDebugEnabled())
 220                                         log.debug("Unregistered image " + previousResourceName);
 221                         }
 222                         return CmsUiUtils.getDataPath(fileNode);
 223                 } catch (IOException e) {
 224                         throw new RuntimeException("Cannot upload image " + fileName + " in " + parentNode, e);
 225                 } finally {
 226                         IOUtils.closeQuietly(inputStream);
 227                 }
 228         }
 229
 230         /** Does nothing by default. */
 231         protected void processNewImageFile(Node context, Node fileNode, ImageData id)
 232                         throws RepositoryException, IOException {
 233         }
 234 }