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