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

    final ComponentTag openTag)
  {
    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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    add(new MultiLineLabel("stacktrace", getStackTrace(throwable)));


    // Get values
    String resource = "";
    String markup = "";
    MarkupStream markupStream = null;


    if (throwable instanceof MarkupException)
    {
      markupStream = ((MarkupException)throwable).getMarkupStream();


      if (markupStream != null)
      {
        markup = markupStream.toHtmlDebugString();
        resource = markupStream.getResource().toString();
      }
    }


    // Create markup label
    final MultiLineLabel markupLabel = new MultiLineLabel("markup", markup);

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      if (throwable instanceof WicketRuntimeException)
      {
        String msg = throwable.getMessage();
        if (throwable instanceof MarkupException)
        {
          MarkupStream stream = ((MarkupException)throwable).getMarkupStream();
          if (stream != null)
          {
            String text = "\n" + stream.toString();
            if (msg.endsWith(text))
            {
              msg = msg.substring(0, msg.length() - text.length());
            }
          }

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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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    {
      throw new MarkupException("Unable to get page markup: " + getPage().toString());
    }


    // Find the markup fragment
    MarkupStream stream = new MarkupStream(markup);
    IMarkupFragment headerMarkup = null;
    while (stream.skipUntil(ComponentTag.class) && (headerMarkup == null))
    {
      ComponentTag tag = stream.getTag();
      if (tag.isOpen() || tag.isOpenClose())
      {
        if (tag instanceof WicketTag)
        {
          WicketTag wtag = (WicketTag)tag;
          if (wtag.isHeadTag())
          {
            if (tag.getMarkupClass() == null)
            {
              headerMarkup = stream.getMarkupFragment();
            }
          }
        }
        else if (tag.getName().equalsIgnoreCase("head"))
        {
          headerMarkup = stream.getMarkupFragment();
        }
      }


      stream.next();
    }


    setMarkup(headerMarkup);
    return headerMarkup;
  }

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    IMarkupFragment markup = getAssociatedMarkup();


    // If we found markup for this container
    if (markup != null)
    {
      return new MarkupStream(markup);
    }


    if (throwException == true)
    {
      // throw exception since there is no associated markup

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   *            message that will be used for exceptions
   */
  public final void renderAssociatedMarkup(final String openTagName, final String exceptionMessage)
  {
    // Get associated markup file for the Border or Panel component
    final MarkupStream associatedMarkupStream = new MarkupStream(getMarkup(null));


    // Get open tag in associated markup of border component
    MarkupElement elem = associatedMarkupStream.get();
    if ((elem instanceof ComponentTag) == false)
    {
      associatedMarkupStream.throwMarkupException("Expected the open tag. " +
        exceptionMessage);
    }


    // Check for required open tag name
    ComponentTag associatedMarkupOpenTag = (ComponentTag)elem;
    if (!((associatedMarkupOpenTag != null) && associatedMarkupOpenTag.isOpen() && (associatedMarkupOpenTag instanceof WicketTag)))
    {
      associatedMarkupStream.throwMarkupException(exceptionMessage);
    }


    try
    {
      setIgnoreAttributeModifier(true);
      renderComponentTag(associatedMarkupOpenTag);
      associatedMarkupStream.next();


      String className = null;


      final boolean outputClassName = getApplication().getDebugSettings()
        .isOutputMarkupContainerClassName();

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  {
    // Markup must be available
    IMarkupFragment markup = getMarkup();
    if ((markup != null) && (markup.size() > 1))
    {
      MarkupStream stream = new MarkupStream(markup);


      // Skip the first component tag which already belongs to 'this' container
      if (stream.skipUntil(ComponentTag.class))
      {
        stream.next();
      }


      // Search for <wicket:xxx> in the remaining markup and try to resolve the component
      while (stream.skipUntil(ComponentTag.class))
      {
        ComponentTag tag = stream.getTag();
        if (tag.isOpen() || tag.isOpenClose())
        {
          if (tag instanceof WicketTag)
          {
            Component component = ComponentResolvers.resolve(this, stream, tag, null);
            if ((component != null) && (component.getParent() == null))
            {
              if (component.getId().equals(tag.getId()) == false)
              {
                // make sure we are able to get() the component during rendering
                tag.setId(component.getId());
                tag.setModified(true);
              }
              add(component);
            }
          }


          if (tag.isOpen())
          {
            stream.skipToMatchingCloseTag(tag);
          }
        }
        stream.next();
      }
    }
  }

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   * 
   * @return markup attributes
   */
  public final ValueMap getMarkupAttributes()
  {
    MarkupStream markupStream = locateMarkupStream();
    ValueMap attrs = new ValueMap(markupStream.getTag().getAttributes());
    attrs.makeImmutable();
    return attrs;
  }

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