/*
* 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.Expression;
import com.google.dart.engine.ast.SimpleIdentifier;
import com.google.dart.engine.element.VariableElement;
import com.google.dart.engine.html.ast.XmlAttributeNode;
import com.google.dart.engine.html.ast.XmlTagNode;
import com.google.dart.engine.internal.element.LocalVariableElementImpl;
import com.google.dart.engine.type.InterfaceType;
/**
* {@link NgModelProcessor} describes built-in <code>NgModel</code> directive.
*/
class NgModelProcessor extends NgDirectiveProcessor {
private static final String NG_MODEL = "ng-model";
public static final NgModelProcessor INSTANCE = new NgModelProcessor();
private NgModelProcessor() {
}
@Override
public void apply(AngularHtmlUnitResolver resolver, XmlTagNode node) {
XmlAttributeNode attribute = node.getAttribute(NG_MODEL);
Expression expression = parseDartExpression(resolver, attribute);
// identifiers have been already handled by "apply top"
if (expression instanceof SimpleIdentifier) {
return;
}
// resolve
resolver.resolveNode(expression);
// remember expression
setExpression(attribute, expression);
}
@Override
public boolean canApply(XmlTagNode node) {
return node.getAttribute(NG_MODEL) != null;
}
/**
* This method is used to define top-level {@link VariableElement}s for each "ng-model" with
* simple identifier model.
*/
void applyTopDeclarations(AngularHtmlUnitResolver resolver, XmlTagNode node) {
XmlAttributeNode attribute = node.getAttribute(NG_MODEL);
Expression expression = parseDartExpression(resolver, attribute);
// if not identifier, then not a top-level model, delay until "apply"
if (!(expression instanceof SimpleIdentifier)) {
return;
}
SimpleIdentifier identifier = (SimpleIdentifier) expression;
// define variable Element
InterfaceType type = resolver.getTypeProvider().getStringType();
LocalVariableElementImpl element = resolver.createLocalVariableFromIdentifier(type, identifier);
resolver.defineTopVariable(element);
// remember expression
identifier.setStaticElement(element);
identifier.setStaticType(type);
setExpression(attribute, identifier);
}
}