/*
* Copyright (c) 2013, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.eclipse.org/legal/epl-v10.html
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.dart.engine.internal.html.angular;
import com.google.dart.engine.ast.Expression;
import com.google.dart.engine.html.ast.HtmlUnit;
import com.google.dart.engine.html.ast.RawXmlExpression;
import com.google.dart.engine.html.ast.XmlAttributeNode;
import com.google.dart.engine.html.ast.XmlExpression;
import com.google.dart.engine.html.ast.XmlTagNode;
import com.google.dart.engine.html.ast.visitor.RecursiveXmlVisitor;
import java.util.List;
/**
* Recursively visits {@link HtmlUnit} and every embedded {@link Expression}.
*/
public abstract class ExpressionVisitor extends RecursiveXmlVisitor<Void> {
/**
* Visits the given {@link Expression}s embedded into tag or attribute.
*
* @param expression the {@link Expression} to visit, not {@code null}
*/
public abstract void visitExpression(Expression expression);
@Override
public Void visitXmlAttributeNode(XmlAttributeNode node) {
visitExpressions(node.getExpressions());
return super.visitXmlAttributeNode(node);
}
@Override
public Void visitXmlTagNode(XmlTagNode node) {
visitExpressions(node.getExpressions());
return super.visitXmlTagNode(node);
}
/**
* Visits {@link Expression}s of the given {@link XmlExpression}s.
*/
private void visitExpressions(XmlExpression[] expressions) {
for (XmlExpression xmlExpression : expressions) {
if (xmlExpression instanceof AngularXmlExpression) {
AngularXmlExpression angularXmlExpression = (AngularXmlExpression) xmlExpression;
List<Expression> dartExpressions = angularXmlExpression.getExpression().getExpressions();
for (Expression dartExpression : dartExpressions) {
visitExpression(dartExpression);
}
}
if (xmlExpression instanceof RawXmlExpression) {
RawXmlExpression rawXmlExpression = (RawXmlExpression) xmlExpression;
visitExpression(rawXmlExpression.getExpression());
}
}
}
}