Examples of org.apache.wicket.markup.MarkupStream

org.apache.wicket.markup.MarkupStream
A stream of {@link org.apache.wicket.markup.MarkupElement}s, subclasses of which are {@link org.apache.wicket.markup.ComponentTag} and {@link org.apache.wicket.markup.RawMarkup}. A markup stream has a current index in the list of markup elements. The next markup element can be retrieved and the index advanced by calling next(). If the index hits the end, hasMore() will return false.
The current markup element can be accessed with get() and as a ComponentTag with getTag().
The stream can be sought to a particular location with setCurrentIndex().
Convenience methods also exist to skip component tags (and any potentially nested markup) or raw markup.
Several boolean methods of the form at*() return true if the markup stream is positioned at a tag with a given set of characteristics.
The resource from which the markup was loaded can be retrieved with getResource(). @author Jonathan Locke

   */
  @Override
  protected void onRender()
  {
    // Loop through the markup in this container
    MarkupStream markupStream = new MarkupStream(getMarkup());
    renderAll(markupStream, null);
  }

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    {
      throw new MarkupNotFoundException("Markup not found for Component: " + toString());
    }


    // MarkupStream is an Iterator for the markup
    MarkupStream markupStream = new MarkupStream(markup);


    // Flag: we started the render process
    markRendering(true);


    MarkupElement elem = markup.get(0);

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    if (markup == null)
    {
      throw new MarkupException("Markup not found. Component: " + toString());
    }


    final MarkupStream markupStream = new MarkupStream(markup);


    // Get mutable copy of next tag
    final ComponentTag openTag = markupStream.getTag();
    final ComponentTag tag = openTag.mutable();


    // Call any tag handler
    onComponentTag(tag);


    // If we're an openclose tag
    if (!tag.isOpenClose() && !tag.isOpen())
    {
      // We were something other than <tag> or <tag/>
      markupStream.throwMarkupException("Method renderComponent called on bad markup element: " +
        tag);
    }


    if (tag.isOpenClose() && openTag.isOpen())
    {
      markupStream.throwMarkupException("You can not modify a open tag to open-close: " + tag);
    }


    try
    {
      // Render open tag
      if (getRenderBodyOnly() == false)
      {
        renderComponentTag(tag);
      }
      markupStream.next();


      // Render the body only if open-body-close. Do not render if open-close.
      if (tag.isOpen())
      {
        // Render the body. The default strategy will simply call the component's

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            .append(isVersioned());
        }


        if (markup != null)
        {
          buffer.append(", markup = ").append(new MarkupStream(getMarkup()).toString());
        }
      }


      buffer.append(']');

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   * @return The markup stream for this component. Since a Component cannot have a markup stream,
   *         we ask this component's parent to search for it.
   */
  protected final MarkupStream findMarkupStream()
  {
    return new MarkupStream(getMarkup());
  }

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  {
    // Skip the body markup making sure it contains only raw markup
    super.onComponentTagBody(component, markupStream, openTag);


    // Get the fragments open tag
    MarkupStream stream = new MarkupStream(getMarkup((MarkupContainer)component, null));
    ComponentTag fragmentOpenTag = stream.getTag();


    // if it is an open close tag, skip this fragment.
    if (!fragmentOpenTag.isOpenClose())
    {
      // We'll completely ignore the fragments open tag. It'll not be rendered
      stream.next();


      // Render the body of the fragment
      component.onComponentTagBody(stream, fragmentOpenTag);
    }
  }

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        markupStream.skipRawMarkup();
      }


      // Get the <span wicket:id="myBorder"> markup and render that instead
      IMarkupFragment markup = Border.this.getMarkup();
      MarkupStream stream = new MarkupStream(markup);
      ComponentTag tag = stream.getTag();
      stream.next();


      super.onComponentTagBody(stream, tag);
    }

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     */
    private final IMarkupFragment findByName(final IMarkupFragment markup, final String name)
    {
      Args.notEmpty(name, "name");


      MarkupStream stream = new MarkupStream(markup);


      // Skip any raw markup
      stream.skipUntil(ComponentTag.class);


      // Skip <wicket:border>
      stream.next();


      while (stream.skipUntil(ComponentTag.class))
      {
        ComponentTag tag = stream.getTag();
        if (tag.isOpen() || tag.isOpenClose())
        {
          if (TagUtils.isWicketBodyTag(tag))
          {
            return stream.getMarkupFragment();
          }
        }


        stream.next();
      }


      return null;
    }

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   * @param markup
   * @return null, if not found
   */
  private final IMarkupFragment findStartTag(final IMarkupFragment markup)
  {
    MarkupStream stream = new MarkupStream(markup);


    while (stream.skipUntil(ComponentTag.class))
    {
      ComponentTag tag = stream.getTag();
      if (tag.isOpen() || tag.isOpenClose())
      {
        if (tag instanceof WicketTag)
        {
          WicketTag wtag = (WicketTag)tag;
          if (tagName.equalsIgnoreCase(wtag.getName()))
          {
            return stream.getMarkupFragment();
          }
        }


        stream.skipToMatchingCloseTag(tag);
      }


      stream.next();
    }


    return null;
  }

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    // Get the associated markup
    IMarkupFragment markup = container.getAssociatedMarkup();
    IMarkupFragment childMarkup = null;


    // MarkupStream is good at searching markup
    MarkupStream stream = new MarkupStream(markup);
    while (stream.skipUntil(ComponentTag.class) && (childMarkup == null))
    {
      ComponentTag tag = stream.getTag();
      if (TagUtils.isWicketHeadTag(tag))
      {
        if (tag.getMarkupClass() == null)
        {
          // find() can still fail an return null => continue the search
          childMarkup = stream.getMarkupFragment().find(child.getId());
        }
      }
      else if (TagUtils.isHeadTag(tag))
      {
        // find() can still fail an return null => continue the search
        childMarkup = stream.getMarkupFragment().find(child.getId());
      }


      // Must be a direct child. We are not interested in grand children
      if (tag.isOpen() && !tag.hasNoCloseTag())
      {
        stream.skipToMatchingCloseTag(tag);
      }
      stream.next();
    }


    return childMarkup;
  }

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