Examples with HeaderPartContainer org.apache.wicket.markup.html.HeaderPartContainer used on opensource projects

Example 1 with HeaderPartContainer

use of org.apache.wicket.markup.html.HeaderPartContainer in project wicket by apache.

the class AssociatedMarkupSourcingStrategy method renderHeadFromAssociatedMarkupFile.

/**
 * Called by components like Panel and Border which have associated Markup and which may have a
 * <wicket:head> tag.
 * <p>
 * Whereas 'this' might be a Panel or Border, the HtmlHeaderContainer parameter has been added
 * to the Page as a container for all headers any of its components might wish to contribute to.
 * <p>
 * The headers contributed are rendered in the standard way.
 *
 * @param container
 * @param htmlContainer
 *            The HtmlHeaderContainer added to the Page
 */
public final void renderHeadFromAssociatedMarkupFile(final WebMarkupContainer container, final HtmlHeaderContainer htmlContainer) {
    // reset for each render in case the strategy is re-used
    noMoreWicketHeadTagsAllowed = false;
    // Gracefully getAssociateMarkupStream. Throws no exception in case
    // markup is not found
    final MarkupStream markupStream = container.getAssociatedMarkupStream(false);
    if (markupStream == null) {
        return;
    }
    // Position pointer at current (first) header
    noMoreWicketHeadTagsAllowed = false;
    while (nextHeaderMarkup(markupStream) != -1) {
        // found <wicket:head>
        String headerId = getHeaderId(container, markupStream);
        // Create a HeaderPartContainer and associate the markup
        HeaderPartContainer headerPart = getHeaderPart(container, headerId, markupStream.getMarkupFragment());
        if (headerPart != null) {
            // to the page or any other container in the hierarchy.
            if (htmlContainer.okToRenderComponent(headerPart.getScope(), headerPart.getId())) {
                // make sure the Page is accessible
                headerPart.setParent(htmlContainer);
                headerPart.render();
            }
        }
        // Position the stream after <wicket:head>
        markupStream.skipComponent();
    }
}