org.eclipse.wb.internal.xwt.model.jface.ViewerInfo.java Source code

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Here is the source code for org.eclipse.wb.internal.xwt.model.jface.ViewerInfo.java

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/*******************************************************************************
 * Copyright (c) 2011 Google, Inc.
 * 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
 *
 * Contributors:
 *    Google, Inc. - initial API and implementation
 *******************************************************************************/
package org.eclipse.wb.internal.xwt.model.jface;

import org.eclipse.wb.core.model.ObjectInfo;
import org.eclipse.wb.core.model.broadcast.ObjectInfoChildAddAfter;
import org.eclipse.wb.internal.core.utils.state.GlobalState;
import org.eclipse.wb.internal.core.xml.model.EditorContext;
import org.eclipse.wb.internal.core.xml.model.IWrapperInfo;
import org.eclipse.wb.internal.core.xml.model.XmlObjectInfo;
import org.eclipse.wb.internal.core.xml.model.creation.CreationSupport;
import org.eclipse.wb.internal.core.xml.model.description.ComponentDescription;
import org.eclipse.wb.internal.core.xml.model.utils.XmlObjectUtils;
import org.eclipse.wb.internal.xwt.model.property.editor.style.StylePropertyEditor;
import org.eclipse.wb.internal.xwt.model.widgets.ControlInfo;

import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.widgets.Control;

import org.apache.commons.lang.StringUtils;

import java.lang.reflect.Method;

/**
 * Model for JFace {@link Viewer}.
 * 
 * @author scheglov_ke
 * @coverage XWT.model.jface
 */
public class ViewerInfo extends XmlObjectInfo implements IWrapperInfo {
    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public ViewerInfo(EditorContext context, ComponentDescription description, CreationSupport creationSupport)
            throws Exception {
        super(context, description, creationSupport);
        StylePropertyEditor.addStyleProperty(this);
        if (GlobalState.isParsing()) {
            addBroadcastListener(new ObjectInfoChildAddAfter() {
                public void invoke(ObjectInfo parent, ObjectInfo child) throws Exception {
                    if (child == ViewerInfo.this) {
                        removeBroadcastListener(this);
                        rebindHierarchy();
                    }
                }
            });
        }
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Access
    //
    ////////////////////////////////////////////////////////////////////////////
    /**
     * @return the wrapped {@link ControlInfo}.
     */
    public ControlInfo getControl() {
        return (ControlInfo) getParent();
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // IWrapperInfo
    //
    ////////////////////////////////////////////////////////////////////////////
    private ControlInfo m_wrappedControl;

    public ControlInfo getWrapped() throws Exception {
        if (m_wrappedControl == null) {
            Method method = getWrapperMethod();
            String property = getPropertyName(method);
            m_wrappedControl = (ControlInfo) XmlObjectUtils.createObject(getContext(), method.getReturnType(),
                    new ViewerCreationSupport(this, method, property));
        }
        return m_wrappedControl;
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Delete
    //
    ////////////////////////////////////////////////////////////////////////////
    private boolean m_deleting;

    @Override
    public void delete() throws Exception {
        if (!m_deleting) {
            m_deleting = true;
            ControlInfo wrapped = getControl();
            if (!wrapped.isDeleting()) {
                m_deleting = true;
                try {
                    wrapped.delete();
                } finally {
                    m_deleting = false;
                }
                return;
            }
        }
        super.delete();
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Implementation
    //
    ////////////////////////////////////////////////////////////////////////////
    /**
     * Creates corresponding {@link ControlInfo} and binds models.
     */
    private void rebindHierarchy() throws Exception {
        Method method = getWrapperMethod();
        String property = getPropertyName(method);
        XmlObjectInfo control = XmlObjectUtils.createObject(getContext(), method.getReturnType(),
                new ViewerControlCreationSupport(this, method, property));
        // do rebind
        ObjectInfo parent = getParent();
        parent.addChild(control, this);
        parent.removeChild(this);
        control.addChild(this);
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Utils
    //
    ////////////////////////////////////////////////////////////////////////////
    /**
     * @return the {@link Method} which is used to access wrapped {@link Control}.
     */
    private Method getWrapperMethod() throws NoSuchMethodException {
        String methodName = XmlObjectUtils.getParameter(this, "viewer.control.method");
        return getDescription().getComponentClass().getMethod(methodName);
    }

    /**
     * @return the name of property which corresponds to the given getter {@link Method}.
     */
    private static String getPropertyName(Method method) {
        String property = StringUtils.removeStart(method.getName(), "get");
        return StringUtils.uncapitalize(property);
    }
}