Examples of org.apache.wicket.MarkupContainer

org.apache.wicket.MarkupContainer
A MarkupContainer holds a map of child components.
- Children - Children can be added by calling the {@link #add(Component)} method, andthey can be looked up using a colon separated path. For example, if a container called "a" held a nested container "b" which held a nested component "c", then a.get("b:c") would return the Component with id "c". The number of children in a MarkupContainer can be determined by calling size(), and the whole hierarchy of children held by a MarkupContainer can be traversed by calling visitChildren(), passing in an implementation of IVisitor.
- Markup Rendering - A MarkupContainer also holds/references associated markup which is used to render the container. As the markup stream for a container is rendered, component references in the markup are resolved by using the container to look up Components in the container's component map by id. Each component referenced by the markup stream is given an opportunity to render itself using the markup stream.
  Components may alter their referring tag, replace the tag's body or insert markup after the tag. But components cannot remove tags from the markup stream. This is an important guarantee because graphic designers may be setting attributes on component tags that affect visual presentation.
  The type of markup held in a given container subclass can be determined by calling {@link #getMarkupType()}. Markup is accessed via a MarkupStream object which allows a component to traverse ComponentTag and RawMarkup MarkupElements while rendering a response. Markup in the stream may be HTML or some other kind of markup, such as VXML, as determined by the specific container subclass.
  A markup stream may be directly associated with a container via setMarkupStream. However, a container which does not have a markup stream (its getMarkupStream() returns null) may inherit a markup stream from a container above it in the component hierarchy. The {@link #findMarkupStream()} method will locate the first container at or above this containerwhich has a markup stream.
  All Page containers set a markup stream before rendering by calling the method {@link #getAssociatedMarkupStream(boolean)} to load the markup associated with the page. SincePage is at the top of the container hierarchy, it is guaranteed that {@link #findMarkupStream()}will always return a valid markup stream. @see MarkupStream @author Jonathan Locke

      }
      else
      {
        while (rows.hasNext())
        {
          MarkupContainer row = (MarkupContainer)rows.next();
          cells = ((MarkupContainer)row.iterator().next()).iterator();
          if (cells.hasNext())
          {
            next = (Item)cells.next();
            break;
          }

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      // head first.
      if (container instanceof WebPage)
      {
        // Create a special header component which will gather
        // additional input the <head> from 'contributors'.
        final MarkupContainer header = new HtmlHeaderContainer(
          HtmlHeaderSectionHandler.HEADER_ID + container.getPage().getAutoIndex());


        // It is <wicket:head>. Because they do not provide any
        // additional functionality they are merely a means of surrounding relevant
        // markup. Thus we simply create a WebMarkupContainer to handle
        // the tag.
        final WebMarkupContainer header2 = new WebMarkupContainer(
          HtmlHeaderSectionHandler.HEADER_ID)
        {
          private static final long serialVersionUID = 1L;


          public boolean isTransparentResolver()
          {
            return true;
          }
        };


        header2.setRenderBodyOnly(true);


        header.add(header2);


        container.autoAdd(header, markupStream);
      }
      else if (container instanceof HtmlHeaderContainer)
      {
        // It is <wicket:head>. Because they do not provide any
        // additional functionality there are merely a means of surrounding
        // relevant markup. Thus we simply create a WebMarkupContainer to handle
        // the tag.
        final WebMarkupContainer header = new WebMarkupContainer(
          HtmlHeaderSectionHandler.HEADER_ID)
        {
          private static final long serialVersionUID = 1L;


          public boolean isTransparentResolver()
          {
            return true;
          }
        };
        header.setRenderBodyOnly(true);


        try
        {
          container.autoAdd(header, markupStream);
        }

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          log.warn("Did not find corresponding java class: " + className);
          // fall through
        }


        // Make sure base markup pages (inheritance) are handled correct
        MarkupContainer parentWithContainer = container;
        if (container.getParent() != null)
        {
          parentWithContainer = container.findParentWithAssociatedMarkup();
        }
        if ((parentWithContainer instanceof Page) && !pathInfo.path.startsWith("/") &&

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  {
    // In case of nested Borders, the outer border is no longer able to find
    // its body container easily. Thus we need to help resolve it.


    // The container is the body component. Get the Border component.
    MarkupContainer border = container.getParent();
    while ((border != null) && !(border instanceof Border))
    {
      border = border.getParent();
    }


    // Avoid recursions. It is the outer border which needs help to resolve
    // it. Not the inner border (this == border).
    if ((border == null) || (this == border))

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   * @throws WicketRuntimeException
   *             Thrown if the image cannot be located
   */
  private void loadStaticImage(final String path)
  {
    MarkupContainer parent = component.findParentWithAssociatedMarkup();
    if (parent instanceof Border)
    {
      parent = parent.getParent();
    }
    final Class scope = parent.getClass();
    resourceReference = new ResourceReference(scope, path)
    {
      private static final long serialVersionUID = 1L;


      /**

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    searchStack.add(component.getClass());


    if (!(component instanceof Page))
    {
      // Add all the component on the way to the Page
      MarkupContainer container = component.getParent();
      while (container != null)
      {
        searchStack.add(container.getClass());
        if (container instanceof Page)
        {
          break;
        }


        container = container.getParent();
      }
    }
    return searchStack;
  }

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   */
  public Component getChildComponent()
  {
    if (childComponent == null)
    {
      MarkupContainer parent = getEnclosureParent();


      if (childId == null)
      {
        throw new MarkupException(
          "You most likely forgot to register the EnclosureHandler with the MarkupParserFactory");
      }


      final Component child = parent.get(childId.toString());
      if (child == null)
      {
        throw new MarkupException(
          "Didn't find child component of <wicket:enclosure> with id='" + childId +
            "'. Component: " + this.toString());

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   * 
   * @return
   */
  private MarkupContainer getEnclosureParent()
  {
    MarkupContainer parent = getParent();
    while (parent != null)
    {
      if (parent.isTransparentResolver())
      {
        parent = parent.getParent();
      }
      else if (parent instanceof BorderBodyContainer)
      {
        parent = ((BorderBodyContainer)parent).findParent(Border.class);
      }

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    setVisible(controller.determineVisibility());


    // transfer visibility to direct children
    originalVisibilityStatus = new HashMap();
    DirectChildTagIterator it = new DirectChildTagIterator(markupStream, openTag);
    MarkupContainer controllerParent = getEnclosureParent();
    while (it.hasNext())
    {
      ComponentTag t = (ComponentTag)it.next();
      Component child = controllerParent.get(t.getId());
      if (child != null)
      {
        originalVisibilityStatus.put(child, Boolean.valueOf(child.isVisibilityAllowed()));
        child.setVisibilityAllowed(isVisible());
      }

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        searchStack.add(component.getClass());


        if (!(component instanceof Page))
        {
            // Add all the component on the way to the Page
            MarkupContainer container = component.getParent();
            while (container != null)
            {
                searchStack.add(container.getClass());
                if (container instanceof Page)
                {
                    break;
                }


                container = container.getParent();
            }
        }
        return searchStack;
    }

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