/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available 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.gdt.eclipse.designer.gwtext.model.layout;
import com.google.gdt.eclipse.designer.model.widgets.WidgetInfo;
import org.eclipse.wb.core.model.JavaInfo;
import org.eclipse.wb.core.model.association.InvocationChildAssociation;
import org.eclipse.wb.core.model.association.InvocationSecondaryAssociation;
import org.eclipse.wb.internal.core.model.creation.ConstructorCreationSupport;
import org.eclipse.wb.internal.core.model.variable.AbstractNoNameVariableSupport;
import org.eclipse.wb.internal.core.model.variable.EmptyVariableSupport;
import org.eclipse.wb.internal.core.model.variable.VariableSupport;
import org.eclipse.wb.internal.core.utils.ast.NodeTarget;
import org.eclipse.wb.internal.core.utils.ast.StatementTarget;
import org.eclipse.wb.internal.core.utils.check.Assert;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.ClassInstanceCreation;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jdt.core.dom.MethodInvocation;
/**
* Implementation of {@link VariableSupport} for virtual {@link LayoutDataInfo}.
* <p>
* "Virtual" is state when there are no layout data at all, i.e. <code>Container.add(Widget)</code>
* is used.
*
* @author scheglov_ke
* @coverage GWTExt.model.layout
*/
public final class VirtualLayoutDataVariableSupport extends AbstractNoNameVariableSupport {
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public VirtualLayoutDataVariableSupport(JavaInfo javaInfo) {
super(javaInfo);
}
////////////////////////////////////////////////////////////////////////////
//
// Access
//
////////////////////////////////////////////////////////////////////////////
@Override
public boolean isDefault() {
return true;
}
@Override
public String getTitle() throws Exception {
return "(virtual layout data)";
}
////////////////////////////////////////////////////////////////////////////
//
// Expressions
//
////////////////////////////////////////////////////////////////////////////
@Override
public String getReferenceExpression(NodeTarget target) throws Exception {
return materialize().getReferenceExpression(target);
}
@Override
public String getAccessExpression(NodeTarget target) throws Exception {
return getReferenceExpression(target) + ".";
}
/**
* Ensures that this {@link LayoutDataInfo} is materialized, i.e. has {@link ASTNode}.
*/
VariableSupport materialize() throws Exception {
String source = m_javaInfo.getDescription().getCreation(null).getSource();
// prepare Container.add(component) invocation
MethodInvocation invocation;
{
WidgetInfo component = (WidgetInfo) m_javaInfo.getParent();
InvocationChildAssociation componentAssociation =
(InvocationChildAssociation) component.getAssociation();
invocation = componentAssociation.getInvocation();
Assert.isTrue(
invocation.arguments().size() == 1,
"Invalid number of association arguments. %s for %s.",
invocation,
component);
}
// set CreationSupport
Expression expression;
{
expression = m_javaInfo.getEditor().addInvocationArgument(invocation, 1, source);
m_javaInfo.setCreationSupport(new ConstructorCreationSupport((ClassInstanceCreation) expression));
m_javaInfo.bindToExpression(expression);
m_javaInfo.addRelatedNode(expression);
}
// set Association
m_javaInfo.setAssociation(new InvocationSecondaryAssociation(invocation));
// set VariableSupport
VariableSupport variableSupport = new EmptyVariableSupport(m_javaInfo, expression);
m_javaInfo.setVariableSupport(variableSupport);
return variableSupport;
}
////////////////////////////////////////////////////////////////////////////
//
// Target
//
////////////////////////////////////////////////////////////////////////////
@Override
public StatementTarget getStatementTarget() throws Exception {
throw new IllegalStateException();
}
////////////////////////////////////////////////////////////////////////////
//
// Object
//
////////////////////////////////////////////////////////////////////////////
@Override
public String toString() {
return "virtual-layout-data";
}
}