com.google.gdt.eclipse.designer.model.widgets.panels.SplitPanelInfo.java Source code

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Here is the source code for com.google.gdt.eclipse.designer.model.widgets.panels.SplitPanelInfo.java

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/*******************************************************************************
 * 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.model.widgets.panels;

import com.google.gdt.eclipse.designer.model.widgets.WidgetInfo;

import org.eclipse.wb.core.model.ObjectInfo;
import org.eclipse.wb.core.model.association.AssociationObject;
import org.eclipse.wb.core.model.association.AssociationObjects;
import org.eclipse.wb.core.model.association.InvocationChildAssociation;
import org.eclipse.wb.core.model.broadcast.ObjectInfoPresentationDecorateText;
import org.eclipse.wb.internal.core.model.JavaInfoUtils;
import org.eclipse.wb.internal.core.model.clipboard.ClipboardCommand;
import org.eclipse.wb.internal.core.model.creation.CreationSupport;
import org.eclipse.wb.internal.core.model.description.ComponentDescription;
import org.eclipse.wb.internal.core.utils.ast.AstEditor;

import org.eclipse.jdt.core.dom.MethodInvocation;

import org.apache.commons.lang.ArrayUtils;
import org.apache.commons.lang.StringUtils;

import java.util.List;

/**
 * Model for GWT <code>SplitPanel</code>.
 * 
 * @author scheglov_ke
 * @coverage gwt.model
 */
public abstract class SplitPanelInfo extends PanelInfo implements ISplitPanelInfo<WidgetInfo> {
    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public SplitPanelInfo(AstEditor editor, ComponentDescription description, CreationSupport creationSupport)
            throws Exception {
        super(editor, description, creationSupport);
        // decorate Widget's text with direction
        addBroadcastListener(new ObjectInfoPresentationDecorateText() {
            public void invoke(ObjectInfo object, String[] text) throws Exception {
                if (object instanceof WidgetInfo && object.getParent() == SplitPanelInfo.this) {
                    String region = getRegion((WidgetInfo) object);
                    text[0] = region + " - " + text[0];
                }
            }
        });
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Access
    //
    ////////////////////////////////////////////////////////////////////////////
    /**
     * @return the {@link WidgetInfo} associated using {@link MethodInvocation} with given name.
     */
    protected final WidgetInfo getWidgetAssociatedByMethod(String... names) {
        List<WidgetInfo> widgets = getChildrenWidgets();
        for (WidgetInfo widget : widgets) {
            String methodName = getWidgetAssociationMethod(widget);
            if (ArrayUtils.contains(names, methodName)) {
                return widget;
            }
        }
        return null;
    }

    /**
     * @return the name of method used to associate given {@link WidgetInfo}, may be <code>null</code>
     *         .
     */
    private static String getWidgetAssociationMethod(WidgetInfo widget) {
        InvocationChildAssociation association = (InvocationChildAssociation) widget.getAssociation();
        return association.getDescription().getName();
    }

    /**
     * @return the name of region used to associate given {@link WidgetInfo}.
     */
    private static String getRegion(WidgetInfo widget) {
        String region = getWidgetAssociationMethod(widget);
        region = StringUtils.substringBetween(region, "set", "Widget");
        region = StringUtils.uncapitalize(region);
        return region;
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Commands
    //
    ////////////////////////////////////////////////////////////////////////////
    public abstract String getEmptyRegion();

    public void command_CREATE(WidgetInfo widget, String region) throws Exception {
        JavaInfoUtils.add(widget, getWidgetAssociation(region), this, null);
    }

    public void command_MOVE(WidgetInfo widget, WidgetInfo next) throws Exception {
        JavaInfoUtils.move(widget, null, this, next);
    }

    public void command_MOVE(WidgetInfo widget, String region) throws Exception {
        if (widget.getParent() != this) {
            JavaInfoUtils.move(widget, getWidgetAssociation(region), this, null);
        } else {
            command_REGION(widget, region);
        }
    }

    private void command_REGION(WidgetInfo widget, String region) throws Exception {
        if (widget.getAssociation() instanceof InvocationChildAssociation) {
            String methodName = getRegionMethod(region);
            InvocationChildAssociation association = (InvocationChildAssociation) widget.getAssociation();
            MethodInvocation invocation = association.getInvocation();
            getEditor().replaceInvocationName(invocation, methodName);
        }
    }

    private static AssociationObject getWidgetAssociation(String region) {
        String methodName = getRegionMethod(region);
        String associationSource = "%parent%." + methodName + "(%child%)";
        return AssociationObjects.invocationChild(associationSource, false);
    }

    private static String getRegionMethod(String region) {
        return "set" + StringUtils.capitalize(region) + "Widget";
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Clipboard
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    protected void clipboardCopy_addWidgetCommands(WidgetInfo widget, List<ClipboardCommand> commands)
            throws Exception {
        final String region = getRegion(widget);
        commands.add(new PanelClipboardCommand<SplitPanelInfo>(widget) {
            private static final long serialVersionUID = 0L;

            @Override
            protected void add(SplitPanelInfo panel, WidgetInfo widget) throws Exception {
                panel.command_CREATE(widget, region);
            }
        });
    }
}