Java Code Examples for com.google.gwt.dom.client.Node#getNodeType()

/**
 * Handles DOM mutation events.
 * @param event
 * @param contentRange  last known selection
 */
public void handleDOMMutation(SignalEvent event, ContentRange contentRange) {
  // Early exit if non-safari or non-mac
  if (!(UserAgent.isSafari() && UserAgent.isMac())) {
    return;
  }

  // We don't care about DOMMutations that we generate while we are reverting.
  if (isReverting) {
    return;
  }

  previousContentRange = contentRange;

  Node n = event.getTarget();
  if (n.getNodeType() == Node.ELEMENT_NODE) {
    Element e = Element.as(event.getTarget());
    if (DOM_EVENTS_IGNORE.contains(event.getType())) {
      // ignore
      return;
    } else if (event.getType().equals("DOMNodeInserted") && handleDOMNodeInserted(e)) {
      return;
    } else if (event.getType().equals("DOMNodeRemoved") && handleDOMNodeRemoved(e)) {
      return;
    }
  }
  return;
}
 

/**
 * Handles DOM mutation events.
 * @param event
 * @param contentRange  last known selection
 */
public void handleDOMMutation(SignalEvent event, ContentRange contentRange) {
  // Early exit if non-safari or non-mac
  if (!(UserAgent.isSafari() && UserAgent.isMac())) {
    return;
  }

  // We don't care about DOMMutations that we generate while we are reverting.
  if (isReverting) {
    return;
  }

  previousContentRange = contentRange;

  Node n = event.getTarget();
  if (n.getNodeType() == Node.ELEMENT_NODE) {
    Element e = Element.as(event.getTarget());
    if (DOM_EVENTS_IGNORE.contains(event.getType())) {
      // ignore
      return;
    } else if (event.getType().equals("DOMNodeInserted") && handleDOMNodeInserted(e)) {
      return;
    } else if (event.getType().equals("DOMNodeRemoved") && handleDOMNodeRemoved(e)) {
      return;
    }
  }
  return;
}
 

public void highlight(String name)
{
    toggleSubnavigation(name);

    com.google.gwt.user.client.Element target = linksPane.getElementById("header-links-ref");
    if(target!=null) // TODO: i think this cannot happen, does it?
    {
        NodeList<Node> childNodes = target.getChildNodes();
        for(int i=0; i<childNodes.getLength(); i++)
        {
            Node n = childNodes.getItem(i);
            if(Node.ELEMENT_NODE == n.getNodeType())
            {
                Element element = (Element) n;
                if(element.getId().equals("header-"+name))
                {
                    element.addClassName("header-link-selected");
                    element.setAttribute("aria-selected", "true");
                }
                else {
                    element.removeClassName("header-link-selected");
                    element.setAttribute("aria-selected", "false");
                }
            }
        }
    }
}
 

/**
 * @return true if it is an element
 */
public static boolean isElement(Node n) {
  return n.getNodeType() == Node.ELEMENT_NODE;
}
 

/**
 * @return true if it is a text node
 */
public static boolean isTextNode(Node n) {
  return n.getNodeType() == Node.TEXT_NODE;
}
 

/** {@inheritDoc} */
public Element asElement(Node node) {
  return node.getNodeType() == Node.ELEMENT_NODE ? node.<Element>cast() : null;
}
 

/** {@inheritDoc} */
public short getNodeType(Node node) {
  return node.getNodeType();
}
 

/**
 * @return true if it is an element
 */
public static boolean isElement(Node n) {
  return n.getNodeType() == Node.ELEMENT_NODE;
}
 

/**
 * @return true if it is a text node
 */
public static boolean isTextNode(Node n) {
  return n.getNodeType() == Node.TEXT_NODE;
}
 

/** {@inheritDoc} */
public Element asElement(Node node) {
  return node.getNodeType() == Node.ELEMENT_NODE ? node.<Element>cast() : null;
}
 

/** {@inheritDoc} */
public short getNodeType(Node node) {
  return node.getNodeType();
}
 

/**
 * Checks whether the properties of given node cannot be accessed (by testing the nodeType).
 *
 * It is sometimes the case where we need to access properties of a Node, but the properties
 * on that node are not readable (for example, a shadow node like a div created to hold the
 * selection within an input field).
 *
 * In these cases, when the javascript cannot access the node's properties, any attempt to do
 * so may cause an internal permissions exception. This method swallows the exception and uses
 * its existence to indicate whether or not the node is actually readable.
 *
 * @param n Node to check
 * @return Whether or not the node can have properties read.
 */
public static boolean isUnreadable(Node n) {
  try {
    n.getNodeType();
    return false;
  } catch (RuntimeException e) {
    return true;
  }
}
 

/**
 * Checks whether the properties of given node cannot be accessed (by testing the nodeType).
 *
 * It is sometimes the case where we need to access properties of a Node, but the properties
 * on that node are not readable (for example, a shadow node like a div created to hold the
 * selection within an input field).
 *
 * In these cases, when the javascript cannot access the node's properties, any attempt to do
 * so may cause an internal permissions exception. This method swallows the exception and uses
 * its existence to indicate whether or not the node is actually readable.
 *
 * @param n Node to check
 * @return Whether or not the node can have properties read.
 */
public static boolean isUnreadable(Node n) {
  try {
    n.getNodeType();
    return false;
  } catch (RuntimeException e) {
    return true;
  }
}