/**
* If the character producer has not been exhausted, ensures that there is a token on pending on
* pending.
*/
private void produce() throws ParseException {
if (!pending.isEmpty()) {
return;
}
if (!splitter.hasNext()) {
return;
}
Token<CssTokenType> t = splitter.next();
pending.add(t);
if (t.type == CssTokenType.PUNCTUATION && splitter.hasNext()) {
if ("!".equals(t.text)) { // Join !important
// IMPORTANT_SYM "!"({w}|{comment})*{I}{M}{P}{O}{R}{T}{A}{N}{T}
Token<CssTokenType> t2 = splitter.next();
while (t2 != null && (t2.type == CssTokenType.SPACE || t2.type == CssTokenType.COMMENT)) {
pending.add(t2);
t2 = splitter.hasNext() ? splitter.next() : null;
}
// The !important is significant regardless of case and whether or not a
// letter is hex escaped.
if (null != t2) {
pending.add(t2);
if (t2.type == CssTokenType.IDENT
&& Strings.eqIgnoreCase("important", decodeCssIdentifier(t2.text))) {
reduce(CssTokenType.DIRECTIVE);
}
}
} else if ("-".equals(t.text)) { // Join '-'{nmstart}{nmchar}*
Token<CssTokenType> t2 = splitter.next();
if (null != t2) {
pending.add(t2);
if (t2.type == CssTokenType.IDENT) {
reduce(CssTokenType.IDENT);
}
}
}
}
}
/**
* Changes the substitution policy for this lexer.
*
* @see #areSubstitutionsAllowed()
*/
public void allowSubstitutions(boolean allow) {
splitter.allowSubstitutions(allow);
}
/**
* True iff ${...} style substitutions should be allowed as described at {@link
* CssTokenType#SUBSTITUTION}
*
* @see #allowSubstitutions(boolean)
*/
public boolean areSubstitutionsAllowed() {
return splitter.areSubstitutionsAllowed();
}
public boolean hasNext() throws ParseException {
return !pending.isEmpty() || splitter.hasNext();
}