JcrVersionCmsEditable.java

   1 package org.argeo.cms.viewers;
   2
   3 import java.util.Observable;
   4
   5 import javax.jcr.Node;
   6 import javax.jcr.RepositoryException;
   7 import javax.jcr.Session;
   8 import javax.jcr.nodetype.NodeType;
   9 import javax.jcr.version.VersionManager;
  10
  11 import org.argeo.cms.CmsEditable;
  12 import org.argeo.cms.CmsEditionEvent;
  13 import org.argeo.cms.CmsException;
  14 import org.eclipse.rap.rwt.RWT;
  15 import org.eclipse.swt.SWT;
  16 import org.eclipse.swt.widgets.Display;
  17 import org.eclipse.swt.widgets.Event;
  18 import org.eclipse.swt.widgets.Listener;
  19
  20 /** Provides the CmsEditable semantic based on JCR versioning. */
  21 public class JcrVersionCmsEditable extends Observable implements CmsEditable {
  22         private final String nodePath;// cache
  23         private final VersionManager versionManager;
  24         private final Boolean canEdit;
  25
  26         public JcrVersionCmsEditable(Node node) throws RepositoryException {
  27                 this.nodePath = node.getPath();
  28                 if (node.getSession().hasPermission(node.getPath(),
  29                                 Session.ACTION_ADD_NODE)) {
  30                         canEdit = true;
  31                         if (!node.isNodeType(NodeType.MIX_VERSIONABLE)) {
  32                                 node.addMixin(NodeType.MIX_VERSIONABLE);
  33                                 node.getSession().save();
  34                         }
  35                         versionManager = node.getSession().getWorkspace()
  36                                         .getVersionManager();
  37                 } else {
  38                         canEdit = false;
  39                         versionManager = null;
  40                 }
  41
  42                 // bind keys
  43                 if (canEdit) {
  44                         Display display = Display.getCurrent();
  45                         display.setData(RWT.ACTIVE_KEYS, new String[] { "CTRL+RETURN",
  46                                         "CTRL+E" });
  47                         display.addFilter(SWT.KeyDown, new Listener() {
  48                                 private static final long serialVersionUID = -4378653870463187318L;
  49
  50                                 public void handleEvent(Event e) {
  51                                         boolean ctrlPressed = (e.stateMask & SWT.CTRL) != 0;
  52                                         if (ctrlPressed && e.keyCode == '\r')
  53                                                 stopEditing();
  54                                         else if (ctrlPressed && e.keyCode == 'E')
  55                                                 stopEditing();
  56                                 }
  57                         });
  58                 }
  59         }
  60
  61         @Override
  62         public Boolean canEdit() {
  63                 return canEdit;
  64         }
  65
  66         public Boolean isEditing() {
  67                 try {
  68                         if (!canEdit())
  69                                 return false;
  70                         return versionManager.isCheckedOut(nodePath);
  71                 } catch (RepositoryException e) {
  72                         throw new CmsException("Cannot check whether " + nodePath
  73                                         + " is editing", e);
  74                 }
  75         }
  76
  77         @Override
  78         public void startEditing() {
  79                 try {
  80                         versionManager.checkout(nodePath);
  81                         setChanged();
  82                 } catch (RepositoryException e1) {
  83                         throw new CmsException("Cannot publish " + nodePath);
  84                 }
  85                 notifyObservers(new CmsEditionEvent(nodePath,
  86                                 CmsEditionEvent.START_EDITING));
  87         }
  88
  89         @Override
  90         public void stopEditing() {
  91                 try {
  92                         versionManager.checkin(nodePath);
  93                         setChanged();
  94                 } catch (RepositoryException e1) {
  95                         throw new CmsException("Cannot publish " + nodePath, e1);
  96                 }
  97                 notifyObservers(new CmsEditionEvent(nodePath,
  98                                 CmsEditionEvent.STOP_EDITING));
  99         }
 100 }