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package org.zwobble.mammoth.styles.parsing;
import org.parboiled.BaseParser;
import org.parboiled.Rule;
import org.parboiled.support.Var;
import org.zwobble.mammoth.styles.HtmlPath;
import org.zwobble.mammoth.styles.HtmlPathElement;
import static org.zwobble.mammoth.util.MammothMaps.map;
public class HtmlPathParser extends BaseParser<HtmlPath> {
public Rule HtmlPath() {
ListVar<HtmlPathElement> elements = new ListVar<>();
return Sequence(Optional(HtmlPathElements(elements)), EOI, push(new HtmlPath(elements.build())));
}
Rule HtmlPathElements(ListVar<HtmlPathElement> elements) {
Var<HtmlPathElement> element = new Var<>();
return Sequence(
HtmlPathElement(element),
elements.append(element),
ZeroOrMore(Sequence(Whitespace(), Ch('>'), Whitespace(), HtmlPathElement(element), elements.append(element))));
}
Rule HtmlPathElement(Var<HtmlPathElement> element) {
ListVar<String> tagNames = new ListVar<>();
ListVar<String> classNames = new ListVar<>();
Var<Boolean> fresh = new Var<>();
return Sequence(
TagNames(tagNames),
ClassNames(classNames),
Fresh(fresh),
element.set(new HtmlPathElement(
tagNames.build(),
classNames.isEmpty() ? map() : map("class", String.join(" ", classNames.build())),
!fresh.get())));
}
Rule TagNames(ListVar<String> tagNames) {
return Sequence(
Identifier(),
tagNames.append(match()),
ZeroOrMore(Sequence("|", Identifier(), tagNames.append(match()))));
}
Rule ClassNames(ListVar<String> classNames) {
Var<String> className = new Var<>();
return ZeroOrMore(Sequence(ClassName(className), classNames.append(className)));
}
Rule ClassName(Var<String> className) {
return Sequence(".", Identifier(), className.set(match()));
}
Rule Fresh(Var<Boolean> fresh) {
return Sequence(fresh.set(false), Optional(":fresh", fresh.set(true)));
}
Rule Identifier() {
return Sequence(
FirstOf(CharRange('a', 'z'), CharRange('A', 'Z')),
ZeroOrMore(FirstOf(CharRange('a', 'z'), CharRange('A', 'Z'), CharRange('0', '9'), Ch('-'), Ch('_'))));
}
Rule Whitespace() {
return ZeroOrMore(AnyOf(" \t"));
}
}
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