/**
* Parse a raw Wiki link of the form "[[link|text]]", and return a WikiLink object representing
* the link.
*
* @param parserInput Input configuration settings for this parser instance.
* @param raw The raw Wiki link text.
* @return A WikiLink object that represents the link.
*/
protected static WikiLink parseWikiLink(
ParserInput parserInput, ParserOutput parserOutput, String raw) throws ParserException {
if (StringUtils.isBlank(raw)) {
return new WikiLink();
}
raw = raw.trim();
String suffix = ((!raw.endsWith("]]")) ? raw.substring(raw.lastIndexOf("]]") + 2) : null);
// for performance reasons use String methods rather than regex
// private static final Pattern WIKI_LINK_PATTERN =
// Pattern.compile("\\[\\[\\s*(\\:\\s*)?\\s*(.+?)(\\s*\\|\\s*(.+))?\\s*\\]\\]([a-z]*)");
raw = raw.substring(raw.indexOf("[[") + 2, raw.lastIndexOf("]]")).trim();
// parse in case there is a template or magic word - [[{{PAGENAME}}]]
raw = JFlexParserUtil.parseFragment(parserInput, parserOutput, raw, JFlexParser.MODE_TEMPLATE);
boolean colon = false;
if (raw.startsWith(":")) {
colon = true;
raw = raw.substring(1).trim();
}
String text = null;
int pos = raw.indexOf('|');
if (pos != -1 && pos != (raw.length() - 1)) {
text = raw.substring(pos + 1).trim();
raw = raw.substring(0, pos).trim();
}
String virtualWiki = parserInput.getVirtualWiki();
WikiLink wikiLink = LinkUtil.parseWikiLink(virtualWiki, raw);
if (!colon && wikiLink.getNamespace().getId().equals(Namespace.CATEGORY_ID)) {
// do not set default text for categories
wikiLink.setText(null);
}
if (wikiLink.getVirtualWiki() != null
&& !StringUtils.equals(wikiLink.getVirtualWiki().getName(), virtualWiki)
&& StringUtils.isBlank(wikiLink.getDestination())) {
// use the root topic name as the destination
wikiLink.setDestination(wikiLink.getVirtualWiki().getRootTopicName());
if (StringUtils.isBlank(wikiLink.getText())) {
wikiLink.setText(wikiLink.getVirtualWiki().getName() + Namespace.SEPARATOR);
}
}
if (wikiLink.getInterwiki() != null
&& StringUtils.isBlank(wikiLink.getDestination())
&& StringUtils.isBlank(wikiLink.getText())) {
wikiLink.setText(wikiLink.getInterwiki().getInterwikiPrefix() + Namespace.SEPARATOR);
}
wikiLink.setColon(colon);
if (text != null) {
wikiLink.setText(text);
}
if (!StringUtils.isBlank(suffix)) {
wikiLink.setText(wikiLink.getText() + suffix);
}
return wikiLink;
}
/**
* Parse a raw Wiki link of the form "[[link|text]]", and return a WikiLink object representing
* the link.
*
* @param raw The raw Wiki link text.
* @return A WikiLink object that represents the link.
*/
protected static WikiLink parseWikiLink(String raw) {
if (StringUtils.isBlank(raw)) {
return new WikiLink();
}
Matcher m = WIKI_LINK_PATTERN.matcher(raw.trim());
if (!m.matches()) {
return new WikiLink();
}
String url = m.group(2);
WikiLink wikiLink = LinkUtil.parseWikiLink(url);
wikiLink.setColon((m.group(1) != null));
wikiLink.setText(m.group(4));
String suffix = m.group(5);
if (!StringUtils.isBlank(suffix)) {
if (StringUtils.isBlank(wikiLink.getText())) {
wikiLink.setText(wikiLink.getDestination() + suffix);
} else {
wikiLink.setText(wikiLink.getText() + suffix);
}
}
return wikiLink;
}
private String processLinkMetadata(
ParserInput parserInput, ParserOutput parserOutput, int mode, String raw, WikiLink wikiLink)
throws ParserException {
String result = raw;
if (!wikiLink.getColon() && wikiLink.getNamespace().getId().equals(Namespace.CATEGORY_ID)) {
String sortKey = wikiLink.getText();
if (!StringUtils.isBlank(sortKey)) {
sortKey = JFlexParserUtil.parseFragment(parserInput, sortKey, JFlexParser.MODE_PREPROCESS);
}
parserOutput.addCategory(wikiLink.getDestination(), sortKey);
if (mode > JFlexParser.MODE_MINIMAL) {
// keep the category around in minimal parsing mode, otherwise suppress it from the output
result = "";
}
}
if (!StringUtils.isBlank(wikiLink.getDestination())) {
parserOutput.addLink(wikiLink.getDestination());
}
return result;
}
/** Parse a Mediawiki link of the form "[[topic|text]]" and return the resulting HTML output. */
public String parse(JFlexLexer lexer, String raw, Object... args) throws ParserException {
boolean containsNestedLinks =
(args.length > 0 && StringUtils.equals(args[0].toString(), "nested"));
WikiLink wikiLink = JFlexParserUtil.parseWikiLink(lexer.getParserInput(), raw);
if (StringUtils.isBlank(wikiLink.getDestination())
&& StringUtils.isBlank(wikiLink.getSection())) {
// no destination or section
return raw;
}
if (containsNestedLinks) {
// if there is a nested link it must be an image, otherwise the syntax is invalid.
if (wikiLink.getColon() || !wikiLink.getNamespace().getId().equals(Namespace.FILE_ID)) {
int start = raw.indexOf("[[");
int end = raw.lastIndexOf("]]");
String content = raw.substring(start + "[[".length(), end);
return "[["
+ JFlexParserUtil.parseFragment(lexer.getParserInput(), content, lexer.getMode())
+ "]]";
}
}
raw =
this.processLinkMetadata(
lexer.getParserInput(), lexer.getParserOutput(), lexer.getMode(), raw, wikiLink);
if (lexer.getMode() <= JFlexParser.MODE_PREPROCESS) {
// do not parse to HTML when in preprocess mode
return raw;
}
if (!wikiLink.getColon() && wikiLink.getNamespace().getId().equals(Namespace.FILE_ID)) {
// parse as an image
return lexer.parse(JFlexLexer.TAG_TYPE_IMAGE_LINK, raw);
}
try {
if (!StringUtils.isBlank(wikiLink.getInterWiki())) {
// inter-wiki link
return LinkUtil.interWiki(wikiLink);
}
String virtualWiki = lexer.getParserInput().getVirtualWiki();
if (wikiLink.getVirtualWiki() != null) {
// link to another virtual wiki
virtualWiki = wikiLink.getVirtualWiki().getName();
}
if (StringUtils.isBlank(wikiLink.getText())
&& !StringUtils.isBlank(wikiLink.getDestination())) {
wikiLink.setText(wikiLink.getDestination());
if (!StringUtils.isBlank(wikiLink.getSection())) {
wikiLink.setText(
wikiLink.getText()
+ "#"
+ Utilities.decodeAndEscapeTopicName(wikiLink.getSection(), true));
}
} else if (StringUtils.isBlank(wikiLink.getText())
&& !StringUtils.isBlank(wikiLink.getSection())) {
wikiLink.setText(Utilities.decodeAndEscapeTopicName("#" + wikiLink.getSection(), true));
} else {
// pass a parameter via the parserInput to prevent nested links from being generated
lexer.getParserInput().getTempParams().put(LINK_CAPTION, true);
wikiLink.setText(
JFlexParserUtil.parseFragment(
lexer.getParserInput(), wikiLink.getText(), lexer.getMode()));
lexer.getParserInput().getTempParams().remove(LINK_CAPTION);
}
if (StringUtils.equals(wikiLink.getDestination(), lexer.getParserInput().getTopicName())
&& StringUtils.equals(virtualWiki, lexer.getParserInput().getVirtualWiki())
&& StringUtils.isBlank(wikiLink.getSection())) {
// same page, bold the text and return
return "<b>"
+ (StringUtils.isBlank(wikiLink.getText())
? wikiLink.getDestination()
: wikiLink.getText())
+ "</b>";
}
// do not escape text html - already done by parser
return LinkUtil.buildInternalLinkHtml(
lexer.getParserInput().getContext(),
virtualWiki,
wikiLink,
wikiLink.getText(),
null,
null,
false);
} catch (DataAccessException e) {
logger.severe("Failure while parsing link " + raw, e);
return "";
} catch (ParserException e) {
logger.severe("Failure while parsing link " + raw, e);
return "";
}
}