/*
* Copyright (c) 2014, 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.AstNode;
import com.google.dart.engine.ast.visitor.ElementLocator;
import com.google.dart.engine.ast.visitor.NodeLocator;
import com.google.dart.engine.element.Element;
import com.google.dart.engine.html.ast.XmlExpression;
/**
* Abstract Angular specific {@link XmlExpression}.
*/
public abstract class AngularXmlExpression extends XmlExpression {
/**
* The expression that is enclosed between the delimiters.
*/
protected final AngularExpression expression;
public AngularXmlExpression(AngularExpression expression) {
this.expression = expression;
}
/**
* Return the embedded {@link AngularExpression}.
*/
public AngularExpression getExpression() {
return expression;
}
@Override
public Reference getReference(int offset) {
// main expression
Reference reference = getReferenceAtNode(expression.getExpression(), offset);
if (reference != null) {
return reference;
}
// formatters
for (AngularFormatterNode formatter : expression.getFormatters()) {
// formatter name
reference = getReferenceAtNode(formatter.getName(), offset);
if (reference != null) {
return reference;
}
// formatter arguments
for (AngularFormatterArgument formatterArgument : formatter.getArguments()) {
reference = getReferenceAtNode(formatterArgument.getExpression(), offset);
if (reference != null) {
return reference;
}
}
}
return null;
}
/**
* If the given {@link AstNode} has an {@link Element} at the given offset, then returns
* {@link Reference} with this {@link Element}.
*/
private Reference getReferenceAtNode(AstNode root, int offset) {
AstNode node = new NodeLocator(offset).searchWithin(root);
if (node != null) {
Element element = ElementLocator.locate(node);
return new Reference(element, node.getOffset(), node.getLength());
}
return null;
}
}