LinkedControl.java

   1 package org.argeo.cms.swt.acr;
   2
   3 import java.net.URI;
   4
   5 import org.argeo.api.acr.Content;
   6 import org.argeo.cms.swt.CmsSwtUtils;
   7 import org.argeo.cms.swt.widgets.StyledControl;
   8 import org.eclipse.swt.widgets.Composite;
   9
  10 /**
  11  * A {@link StyledControl} which can link either to an internal {@link Content}
  12  * or an external URI.
  13  */
  14 public abstract class LinkedControl extends StyledControl {
  15
  16         private static final long serialVersionUID = -7603153425459801216L;
  17
  18         private Content linkedContent;
  19         private URI plainUri;
  20
  21         public LinkedControl(Composite parent, int swtStyle) {
  22                 super(parent, swtStyle);
  23         }
  24
  25         public void setLink(Content linkedContent) {
  26                 if (plainUri != null)
  27                         throw new IllegalStateException("An URI is already set");
  28                 this.linkedContent = linkedContent;
  29         }
  30
  31         public void setLink(URI uri) {
  32                 if (linkedContent != null)
  33                         throw new IllegalStateException("A linked content is already set");
  34                 this.plainUri = uri;
  35         }
  36
  37         public boolean isInternalLink() {
  38                 if (!hasLink())
  39                         throw new IllegalStateException("No link has been set");
  40                 return linkedContent != null;
  41         }
  42
  43         public boolean hasLink() {
  44                 return plainUri != null || linkedContent != null;
  45         }
  46
  47         public Content getLinkedContent() {
  48                 return linkedContent;
  49         }
  50
  51         public URI getPlainUri() {
  52                 return plainUri;
  53         }
  54
  55         public URI toUri() {
  56                 if (plainUri != null)
  57                         return plainUri;
  58                 if (linkedContent != null)
  59                         return URI.create("#" + CmsSwtUtils.cleanPathForUrl(linkedContent.getPath()));
  60                 return null;
  61
  62         }
  63
  64 }