/**
* Gets the header part of the Panel/Border. Returns null if it doesn't have a header tag.
*
* @param container
* @param id
* @param markup
* @return the header part for this panel/border or null if it doesn't have a wicket:head tag.
*/
private HeaderPartContainer getHeaderPart(
final WebMarkupContainer container, final String id, final IMarkupFragment markup) {
// Create a HtmlHeaderContainer for the header tag found
final MarkupElement element = markup.get(0);
if (element instanceof WicketTag) {
final WicketTag wTag = (WicketTag) element;
if ((wTag.isHeadTag() == true) && (wTag.getNamespace() != null)) {
// Create the header container and associate the markup with it
return new HeaderPartContainer(id, container, markup);
}
}
throw new WicketRuntimeException(
"Programming error: expected a WicketTag: " + markup.toString());
}
/**
* Process next header markup fragment.
*
* @param associatedMarkupStream
* @return index or -1 when done
*/
private int nextHeaderMarkup(final MarkupStream associatedMarkupStream) {
// No associated markup => no header section
if (associatedMarkupStream == null) {
return -1;
}
// Scan the markup for <wicket:head>.
MarkupElement elem = associatedMarkupStream.get();
while (elem != null) {
if (elem instanceof WicketTag) {
WicketTag tag = (WicketTag) elem;
if (tag.isOpen() && tag.isHeadTag()) {
if (noMoreWicketHeadTagsAllowed == true) {
throw new MarkupException(
"<wicket:head> tags are only allowed before <body>, </head>, <wicket:panel> etc. tag");
}
return associatedMarkupStream.getCurrentIndex();
}
// wicket:head must be before border, panel or extend
// @TODO why is that? Why can't it be anywhere? (except inside wicket:fragment)
else if (tag.isOpen() && (tag.isPanelTag() || tag.isBorderTag() || tag.isExtendTag())) {
noMoreWicketHeadTagsAllowed = true;
}
} else if (elem instanceof ComponentTag) {
ComponentTag tag = (ComponentTag) elem;
// wicket:head must be before </head>
// @TODO why??
if (tag.isClose() && TagUtils.isHeadTag(tag)) {
noMoreWicketHeadTagsAllowed = true;
}
// wicket:head must be before <body>
// @TODO why??
else if (tag.isOpen() && TagUtils.isBodyTag(tag)) {
noMoreWicketHeadTagsAllowed = true;
}
}
elem = associatedMarkupStream.next();
}
// No (more) wicket:head found
return -1;
}
@Override
public IMarkupFragment getMarkup() {
if (getParent() == null) {
throw new WicketRuntimeException(
"Bug: The Wicket internal instance of HtmlHeaderContainer is not connected to a parent");
}
// Get the page markup
IMarkupFragment markup = getPage().getMarkup();
if (markup == null) {
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;
}