Implementing an Author Mode Action Event Handler

How to Implement an AuthorActionEventHandler

To implement your own AuthorActionEventHandler, follow this procedure:

1. Implement the ro.sync.ecss.extensions.api.AuthorActionEventHandler interface.
2. To instruct Oxygen XML Editor plugin to use this newly created implementation, use either of the following methods:
   1. If you have configured an extensions bundle, you can return the AuthorActionEventHandler implementation using the ro.sync.ecss.extensions.api.ExtensionsBundle.getAuthorActionEventHandler() method.
   2. Specify the AuthorActionEventHandler in the Author action event handler individual extension in the Extensions tab of the Document Type configuration dialog box for your particular document type.

Example

The following example illustrates the use-case mentioned in the introduction, that is an implementation for inserting a new line when the user presses Enter in Author mode. It uses the canHandleEvent method to make sure the insertion will be performed in an element that will preserve the new-line character. Then the handleEvent method inserts the new line at the current cursor position.

public class CustomAuthorActionEventHandler implements AuthorActionEventHandler
{

 /**
  * @see ro.sync.ecss.extensions.api.AuthorActionEventHandler#canHandleEvent
(AuthorAccess, AuthorActionEventType)
  */
  @Override
  public boolean canHandleEvent(AuthorAccess authorAccess,
AuthorActionEventType type) {
    boolean canHandle = false;

    if (type == AuthorActionEventType.ENTER) {
      AuthorDocumentController documentController = 
authorAccess.getDocumentController();
    int caretOffset = authorAccess.getEditorAccess().getCaretOffset();
    try {
      AuthorNode nodeAtOffset = documentController.getNodeAtOffset(caretOffset);
      if (nodeAtOffset instanceof AuthorElement) {
        AuthorElement elementAtOffset = (AuthorElement) nodeAtOffset;
        AttrValue xmlSpace = elementAtOffset.getAttribute("xml:space");
        if (xmlSpace != null && xmlSpace.getValue().equals("preserve")) {
          canHandle = true;
        }
      }
    } catch (BadLocationException ex) {
        if (logger.isDebugEnabled()) {
          logger.error(ex.getMessage(), ex);
        }
      }
    }

    return canHandle;
  }

 /**
  * @see ro.sync.ecss.extensions.api.AuthorActionEventHandler#handleEvent
(ro.sync.ecss.extensions.api.AuthorAccess, 
ro.sync.ecss.extensions.api.AuthorActionEventHandler.AuthorActionEventType)
  */
  @Override
  public boolean handleEvent(AuthorAccess authorAccess,
 AuthorActionEventType eventType) {
    int caretOffset = authorAccess.getEditorAccess().getCaretOffset();
    // Insert a new line
    authorAccess.getDocumentController().insertText(caretOffset, "\n");
    return true;
  }

  /**
   * @see ro.sync.ecss.extensions.api.Extension#getDescription()
   */
  @Override
  public String getDescription() {
    return "Insert a new line";
  }
}