eu.esdihumboldt.hale.ui.functions.groovy.internal.HelperFunctionLabelProvider.java Source code

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Here is the source code for eu.esdihumboldt.hale.ui.functions.groovy.internal.HelperFunctionLabelProvider.java

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/*
 * Copyright (c) 2015 Data Harmonisation Panel
 * 
 * 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:
 *     Data Harmonisation Panel <http://www.dhpanel.eu>
 */

package eu.esdihumboldt.hale.ui.functions.groovy.internal;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.StyledCellLabelProvider;
import org.eclipse.jface.viewers.StyledString;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.graphics.Image;

import eu.esdihumboldt.cst.functions.groovy.helper.Category;
import eu.esdihumboldt.cst.functions.groovy.helper.HelperFunction;
import eu.esdihumboldt.cst.functions.groovy.helper.HelperFunctionOrCategory;
import eu.esdihumboldt.cst.functions.groovy.helper.spec.impl.HelperFunctionSpecification;
import eu.esdihumboldt.hale.ui.common.CommonSharedImages;
import eu.esdihumboldt.hale.ui.common.CommonSharedImagesConstants;

/**
 * Label provider for helper function tray
 * 
 * @author sameer sheikh
 */
public class HelperFunctionLabelProvider extends StyledCellLabelProvider implements ILabelProvider {

    /**
     * Gets the label image for a Category or a functions
     * 
     * @param element A category or a function object
     * @return label image for a category or a function
     */
    @Override
    public Image getImage(Object element) {
        if (element instanceof Category) {
            return CommonSharedImages.getImageRegistry().get(CommonSharedImagesConstants.IMG_DEFINITION_GROUP);
        } else if (element instanceof HelperFunctionOrCategory) {
            return CommonSharedImages.getImageRegistry().get(CommonSharedImagesConstants.IMG_FUNCTION);
        }
        return null;
    }

    /**
     * Gets the text associated for a category or a function
     * 
     * @param element A category or a function
     * @return text for the given category or function.
     */
    @Override
    public String getText(Object element) {

        if (element instanceof Category) {
            return ((Category) element).getName();
        } else if (element instanceof HelperFunctionOrCategory) {
            return ((HelperFunctionOrCategory) element).getName();
        }
        return null;
    }

    /**
     * @see org.eclipse.jface.viewers.StyledCellLabelProvider#update(org.eclipse.jface.viewers.ViewerCell)
     */
    @Override
    public void update(ViewerCell cell) {
        Object element = cell.getElement();
        String elementName = null;

        if (element instanceof Category) {
            cell.setText(((Category) element).getName());
            cell.setImage(
                    CommonSharedImages.getImageRegistry().get(CommonSharedImagesConstants.IMG_DEFINITION_GROUP));
        } else if (element instanceof HelperFunctionOrCategory) {

            HelperFunctionSpecification hfs = null;
            elementName = ((HelperFunctionOrCategory) element).getName();
            StyledString text = new StyledString(elementName);
            try {
                HelperFunction<?> helper = ((HelperFunctionOrCategory) element).asFunction();
                hfs = (HelperFunctionSpecification) helper.getSpec(elementName);
                text.append(PageFunctions.getStyledParameters(hfs));
            } catch (Exception e) {
                //
            }

            cell.setText(text.getString());
            cell.setImage(CommonSharedImages.getImageRegistry().get(CommonSharedImagesConstants.IMG_FUNCTION));
            cell.setStyleRanges(text.getStyleRanges());

        }

        super.update(cell);
    }
}