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package org.jsoup.select;
import org.jsoup.nodes.Element;
/**
* Base structural evaluator.
*/
abstract class StructuralEvaluator extends Evaluator {
Evaluator evaluator;
static class Root extends Evaluator {
@Override
public boolean matches(Element root, Element element) {
return root == element;
}
}
static class Has extends StructuralEvaluator {
public Has(Evaluator evaluator) {
this.evaluator = evaluator;
}
@Override
public boolean matches(Element root, Element element) {
for (Element e : element.getAllElements()) {
if (e != element && evaluator.matches(root, e)) {
return true;
}
}
return false;
}
@Override
public String toString() {
return String.format(":has(%s)", evaluator);
}
}
static class Not extends StructuralEvaluator {
public Not(Evaluator evaluator) {
this.evaluator = evaluator;
}
@Override
public boolean matches(Element root, Element node) {
return !evaluator.matches(root, node);
}
@Override
public String toString() {
return String.format(":not%s", evaluator);
}
}
static class Parent extends StructuralEvaluator {
public Parent(Evaluator evaluator) {
this.evaluator = evaluator;
}
@Override
public boolean matches(Element root, Element element) {
if (root == element) {
return false;
}
Element parent = element.parent();
while (parent != root) {
if (evaluator.matches(root, parent)) {
return true;
}
parent = parent.parent();
}
return false;
}
@Override
public String toString() {
return String.format(":parent%s", evaluator);
}
}
static class ImmediateParent extends StructuralEvaluator {
public ImmediateParent(Evaluator evaluator) {
this.evaluator = evaluator;
}
@Override
public boolean matches(Element root, Element element) {
if (root == element) {
return false;
}
Element parent = element.parent();
return parent != null && evaluator.matches(root, parent);
}
@Override
public String toString() {
return String.format(":ImmediateParent%s", evaluator);
}
}
static class PreviousSibling extends StructuralEvaluator {
public PreviousSibling(Evaluator evaluator) {
this.evaluator = evaluator;
}
@Override
public boolean matches(Element root, Element element) {
if (root == element) {
return false;
}
Element prev = element.previousElementSibling();
while (prev != null) {
if (evaluator.matches(root, prev)) {
return true;
}
prev = prev.previousElementSibling();
}
return false;
}
@Override
public String toString() {
return String.format(":prev*%s", evaluator);
}
}
static class ImmediatePreviousSibling extends StructuralEvaluator {
public ImmediatePreviousSibling(Evaluator evaluator) {
this.evaluator = evaluator;
}
@Override
public boolean matches(Element root, Element element) {
if (root == element) {
return false;
}
Element prev = element.previousElementSibling();
return prev != null && evaluator.matches(root, prev);
}
@Override
public String toString() {
return String.format(":prev%s", evaluator);
}
}
}
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