org.argeo.cms/src/org/argeo/cms/internal/ImageManagerImpl.java

   1 package org.argeo.cms.internal;
   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.CmsConstants.NO_IMAGE_SIZE;
   8 import static org.argeo.cms.CmsTypes.CMS_STYLED;
   9
  10 import java.io.ByteArrayInputStream;
  11 import java.io.IOException;
  12 import java.io.InputStream;
  13
  14 import javax.activation.MimetypesFileTypeMap;
  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.CmsImageManager;
  25 import org.argeo.cms.CmsNames;
  26 import org.argeo.cms.CmsTypes;
  27 import org.argeo.cms.CmsUtils;
  28 import org.argeo.jcr.JcrUtils;
  29 import org.eclipse.rap.rwt.RWT;
  30 import org.eclipse.rap.rwt.service.ResourceManager;
  31 import org.eclipse.rap.rwt.widgets.FileUpload;
  32 import org.eclipse.swt.graphics.Image;
  33 import org.eclipse.swt.graphics.ImageData;
  34 import org.eclipse.swt.graphics.Point;
  35 import org.eclipse.swt.widgets.Control;
  36 import org.eclipse.swt.widgets.Display;
  37 import org.eclipse.swt.widgets.Label;
  38
  39 /** Manages only public images so far. */
  40 public class ImageManagerImpl implements CmsImageManager, CmsNames {
  41         private final static Log log = LogFactory.getLog(ImageManagerImpl.class);
  42         private MimetypesFileTypeMap fileTypeMap = new MimetypesFileTypeMap();
  43
  44         public Boolean load(Node node, Control control, Point preferredSize)
  45                         throws RepositoryException {
  46                 Point imageSize = getImageSize(node);
  47                 Point size;
  48                 String imgTag = null;
  49                 if (preferredSize == null || imageSize.x == 0 || imageSize.y == 0
  50                                 || (preferredSize.x == 0 && preferredSize.y == 0)) {
  51                         if (imageSize.x != 0 && imageSize.y != 0) {
  52                                 // actual image size if completely known
  53                                 size = imageSize;
  54                         } else {
  55                                 // no image if not completely known
  56                                 size = resizeTo(NO_IMAGE_SIZE,
  57                                                 preferredSize != null ? preferredSize : imageSize);
  58                                 imgTag = CmsUtils.noImg(size);
  59                         }
  60
  61                 } else if (preferredSize.x != 0 && preferredSize.y != 0) {
  62                         // given size if completely provided
  63                         size = preferredSize;
  64                 } else {
  65                         // at this stage :
  66                         // image is completely known
  67                         assert imageSize.x != 0 && imageSize.y != 0;
  68                         // one and only one of the dimension as been specified
  69                         assert preferredSize.x == 0 || preferredSize.y == 0;
  70                         size = resizeTo(imageSize, preferredSize);
  71                 }
  72
  73                 boolean loaded = false;
  74                 if (control == null)
  75                         return loaded;
  76
  77                 if (control instanceof Label) {
  78                         if (imgTag == null) {
  79                                 // IMAGE RETRIEVED HERE
  80                                 imgTag = getImageTag(node, size);
  81                                 //
  82                                 if (imgTag == null)
  83                                         imgTag = CmsUtils.noImg(size);
  84                                 else
  85                                         loaded = true;
  86                         }
  87
  88                         Label lbl = (Label) control;
  89                         lbl.setText(imgTag);
  90                         // lbl.setSize(size);
  91                 } else if (control instanceof FileUpload) {
  92                         FileUpload lbl = (FileUpload) control;
  93                         lbl.setImage(CmsUtils.noImage(size));
  94                         lbl.setSize(size);
  95                         return loaded;
  96                 } else
  97                         loaded = false;
  98
  99                 return loaded;
 100         }
 101
 102         private Point resizeTo(Point orig, Point constraints) {
 103                 if (constraints.x != 0 && constraints.y != 0) {
 104                         return constraints;
 105                 } else if (constraints.x == 0 && constraints.y == 0) {
 106                         return orig;
 107                 } else if (constraints.y == 0) {// force width
 108                         return new Point(constraints.x,
 109                                         scale(orig.y, orig.x, constraints.x));
 110                 } else if (constraints.x == 0) {// force height
 111                         return new Point(scale(orig.x, orig.y, constraints.y),
 112                                         constraints.y);
 113                 }
 114                 throw new CmsException("Cannot resize " + orig + " to " + constraints);
 115         }
 116
 117         private int scale(int origDimension, int otherDimension, int otherConstraint) {
 118                 return Math.round(origDimension
 119                                 * divide(otherConstraint, otherDimension));
 120         }
 121
 122         private float divide(int a, int b) {
 123                 return ((float) a) / ((float) b);
 124         }
 125
 126         public Point getImageSize(Node node) throws RepositoryException {
 127                 return new Point(node.hasProperty(CMS_IMAGE_WIDTH) ? (int) node
 128                                 .getProperty(CMS_IMAGE_WIDTH).getLong() : 0,
 129                                 node.hasProperty(CMS_IMAGE_WIDTH) ? (int) node.getProperty(
 130                                                 CMS_IMAGE_HEIGHT).getLong() : 0);
 131         }
 132
 133         /** @return null if not available */
 134         @Override
 135         public String getImageTag(Node node) throws RepositoryException {
 136                 return getImageTag(node, getImageSize(node));
 137         }
 138
 139         private String getImageTag(Node node, Point size)
 140                         throws RepositoryException {
 141                 StringBuilder buf = getImageTagBuilder(node, size);
 142                 if (buf == null)
 143                         return null;
 144                 return buf.append("/>").toString();
 145         }
 146
 147         /** @return null if not available */
 148         @Override
 149         public StringBuilder getImageTagBuilder(Node node, Point size)
 150                         throws RepositoryException {
 151                 return getImageTagBuilder(node, Integer.toString(size.x),
 152                                 Integer.toString(size.y));
 153         }
 154
 155         /** @return null if not available */
 156         private StringBuilder getImageTagBuilder(Node node, String width,
 157                         String height) throws RepositoryException {
 158                 String url = getImageUrl(node);
 159                 if (url == null)
 160                         return null;
 161                 return CmsUtils.imgBuilder(url, width, height);
 162         }
 163
 164         /** @return null if not available */
 165         @Override
 166         public String getImageUrl(Node node) throws RepositoryException {
 167                 String name = getResourceName(node);
 168                 ResourceManager resourceManager = RWT.getResourceManager();
 169                 if (!resourceManager.isRegistered(name)) {
 170                         InputStream inputStream = null;
 171                         Binary binary = getImageBinary(node);
 172                         if (binary == null)
 173                                 return null;
 174                         try {
 175                                 inputStream = binary.getStream();
 176                                 resourceManager.register(name, inputStream);
 177                         } finally {
 178                                 IOUtils.closeQuietly(inputStream);
 179                                 JcrUtils.closeQuietly(binary);
 180                         }
 181                         if (log.isDebugEnabled())
 182                                 log.debug("Registered image " + name);
 183                 }
 184                 return resourceManager.getLocation(name);
 185         }
 186
 187         protected String getResourceName(Node node) throws RepositoryException {
 188                 String workspace = node.getSession().getWorkspace().getName();
 189                 if (node.hasNode(JCR_CONTENT))
 190                         return workspace + '_' + node.getNode(JCR_CONTENT).getIdentifier();
 191                 else
 192                         return workspace + '_' + node.getIdentifier();
 193         }
 194
 195         public Binary getImageBinary(Node node) throws RepositoryException {
 196                 if (node.isNodeType(NT_FILE))
 197                         return node.getNode(JCR_CONTENT).getProperty(JCR_DATA).getBinary();
 198                 else if (node.isNodeType(CMS_STYLED) && node.hasProperty(CMS_DATA)) {
 199                         return node.getProperty(CMS_DATA).getBinary();
 200                 } else {
 201                         return null;
 202                 }
 203         }
 204
 205         public Image getSwtImage(Node node) throws RepositoryException {
 206                 InputStream inputStream = null;
 207                 Binary binary = getImageBinary(node);
 208                 if (binary == null)
 209                         return null;
 210                 try {
 211                         inputStream = binary.getStream();
 212                         return new Image(Display.getCurrent(), inputStream);
 213                 } finally {
 214                         IOUtils.closeQuietly(inputStream);
 215                         JcrUtils.closeQuietly(binary);
 216                 }
 217         }
 218
 219         @Override
 220         public String uploadImage(Node parentNode, String fileName, InputStream in)
 221                         throws RepositoryException {
 222                 InputStream inputStream = null;
 223                 try {
 224                         String previousResourceName = null;
 225                         if (parentNode.hasNode(fileName)) {
 226                                 Node node = parentNode.getNode(fileName);
 227                                 previousResourceName = getResourceName(node);
 228                                 if (node.hasNode(JCR_CONTENT)){
 229                                         node.getNode(JCR_CONTENT).remove();
 230                                         node.addNode(JCR_CONTENT, NT_RESOURCE);
 231                                 }
 232                         }
 233
 234                         byte[] arr = IOUtils.toByteArray(in);
 235                         Node fileNode = JcrUtils.copyBytesAsFile(parentNode, fileName, arr);
 236                         fileNode.addMixin(CmsTypes.CMS_IMAGE);
 237
 238                         inputStream = new ByteArrayInputStream(arr);
 239                         ImageData id = new ImageData(inputStream);
 240                         fileNode.setProperty(CMS_IMAGE_WIDTH, id.width);
 241                         fileNode.setProperty(CMS_IMAGE_HEIGHT, id.height);
 242                         fileNode.setProperty(Property.JCR_MIMETYPE,
 243                                         fileTypeMap.getContentType(fileName));
 244                         fileNode.getSession().save();
 245
 246                         // reset resource manager
 247                         ResourceManager resourceManager = RWT.getResourceManager();
 248                         if (resourceManager.isRegistered(previousResourceName)) {
 249                                 resourceManager.unregister(previousResourceName);
 250                                 if (log.isDebugEnabled())
 251                                         log.debug("Unregistered image " + previousResourceName);
 252                         }
 253                         return getImageUrl(fileNode);
 254                 } catch (IOException e) {
 255                         throw new CmsException("Cannot upload image " + fileName + " in "
 256                                         + parentNode, e);
 257                 } finally {
 258                         IOUtils.closeQuietly(inputStream);
 259                 }
 260         }
 261 }