org.eclipse.wb.internal.layout.group.model.GroupLayoutClipboardCommand.java Source code

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Here is the source code for org.eclipse.wb.internal.layout.group.model.GroupLayoutClipboardCommand.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.layout.group.model;

import com.google.common.collect.Maps;

import org.eclipse.wb.core.model.AbstractComponentInfo;
import org.eclipse.wb.core.model.JavaInfo;
import org.eclipse.wb.core.model.ObjectInfoUtils;
import org.eclipse.wb.internal.core.DesignerPlugin;
import org.eclipse.wb.internal.core.model.clipboard.ClipboardCommand;

import org.apache.commons.io.IOUtils;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

import java.util.Map;

import javax.xml.parsers.DocumentBuilderFactory;

/**
 * Clipboard command for copy/paste a container with GroupLayout.
 * 
 * @author mitin_aa
 */
public abstract class GroupLayoutClipboardCommand extends ClipboardCommand {
    private static final long serialVersionUID = 0L;
    private final String m_layoutXml;

    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public GroupLayoutClipboardCommand(GroupLayoutSupport _this) {
        Map<String, String> componentsMap = Maps.newHashMap();
        // map current component ids to xml ids; this requires child order preserving
        int i = 0;
        for (AbstractComponentInfo component : _this.getLayoutChildren()) {
            componentsMap.put(ObjectInfoUtils.getId(component), "" + i++);
        }
        // store to xml
        m_layoutXml = "<layout>"
                + _this.getLayoutModel().saveContainerLayout(_this.getLayoutRoot(), componentsMap, 0, false)
                + "</layout>";
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // ClipboardCommand
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    public final void execute(JavaInfo javaInfo) throws Exception {
        try {
            // prepare
            GroupLayoutSupport _this = getLayoutSupport(javaInfo);
            // map xml ids back to newly created component ids
            Map<String, String> componentsMap = Maps.newHashMap();
            int i = 0;
            for (AbstractComponentInfo component : _this.getLayoutChildren()) {
                componentsMap.put("" + i++, ObjectInfoUtils.getId(component));
            }
            // parse xml
            Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder()
                    .parse(IOUtils.toInputStream(m_layoutXml));
            NodeList nodes = document.getChildNodes().item(0).getChildNodes();
            // load
            _this.getLayoutModel().loadContainerLayout(ObjectInfoUtils.getId(_this.getLayoutContainer()), nodes,
                    componentsMap);
            // save
            _this.saveLayout();
        } catch (Throwable e) {
            DesignerPlugin.log(e);
        }
    }

    protected abstract GroupLayoutSupport getLayoutSupport(JavaInfo container);
}