eu.esdihumboldt.hale.io.groovy.ui.snippets.SnippetConfigurationPage.java Source code

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Here is the source code for eu.esdihumboldt.hale.io.groovy.ui.snippets.SnippetConfigurationPage.java

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/*
 * Copyright (c) 2018 wetransform GmbH
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     wetransform GmbH <http://www.wetransform.to>
 */

package eu.esdihumboldt.hale.io.groovy.ui.snippets;

import java.net.URI;

import org.apache.commons.io.FilenameUtils;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

import eu.esdihumboldt.hale.io.groovy.snippets.SnippetReader;
import eu.esdihumboldt.hale.io.groovy.snippets.SnippetService;
import eu.esdihumboldt.hale.ui.HaleUI;
import eu.esdihumboldt.hale.ui.io.config.AbstractConfigurationPage;

/**
 * Snippet configuration page.
 * 
 * @author Simon Templer
 */
public class SnippetConfigurationPage extends AbstractConfigurationPage<SnippetReader, SnippetImportWizard> {

    private Text identifierText;

    /**
     * Default constructor.
     */
    public SnippetConfigurationPage() {
        super("snippet");

        setTitle("Groovy snippet");
        setDescription("Please provide an identifier for the snippet");
    }

    @Override
    public void enable() {
        // nothing to do
    }

    @Override
    public void disable() {
        // nothing to do
    }

    @Override
    protected void onShowPage(boolean firstShow) {
        super.onShowPage(firstShow);

        if (firstShow) {
            // determine default for identifier from file name

            URI loc = null;
            try {
                loc = getWizard().getProvider().getSource().getLocation();
            } catch (NullPointerException e) {
                // ignore
            }
            if (loc != null) {
                String baseName = FilenameUtils.getBaseName(loc.getPath());
                if (baseName != null && !baseName.isEmpty()) {
                    baseName = baseName.replaceAll("[^\\w]", "_");
                    identifierText.setText(baseName);
                    updateState();
                }
            }
        }
    }

    @Override
    protected void createContent(Composite page) {
        page.setLayout(new GridLayout(2, false));

        Label identifierLabel = new Label(page, SWT.NONE);
        identifierLabel.setText("Snippet identifier:");

        identifierText = new Text(page, SWT.BORDER | SWT.SINGLE);
        GridDataFactory.swtDefaults().align(SWT.FILL, SWT.BEGINNING).grab(true, false).applyTo(identifierText);
        identifierText.addModifyListener(new ModifyListener() {

            @Override
            public void modifyText(ModifyEvent e) {
                updateState();
            }
        });

        Label description = new Label(page, SWT.NONE);
        description.setText(
                "The snippet identifier serves to identify the snippet when referenced from a Groovy script.");
        GridDataFactory.swtDefaults().span(2, 1).applyTo(description);

        updateState();
    }

    /**
     * Update the page state.
     */
    protected void updateState() {
        if (identifierText == null) {
            setPageComplete(false);
            return;
        }

        setErrorMessage(null);
        //      setMessage(null);
        String id = identifierText.getText();
        boolean valid = false;
        if (id == null || id.isEmpty()) {
            setErrorMessage("Please provide an identifier");
        } else {
            valid = true;

            SnippetService ss = HaleUI.getServiceProvider().getService(SnippetService.class);
            if (ss != null) {
                if (ss.getSnippet(id).isPresent()) {
                    setErrorMessage("There is already a snippet with the given identifer");
                    valid = false;
                }
            }
        }

        setPageComplete(valid);
    }

    @Override
    public boolean updateConfiguration(SnippetReader provider) {
        String id = identifierText.getText();
        if (id == null || id.isEmpty()) {
            return false;
        }
        provider.setIdentifier(id);
        return true;
    }

}