URLLabelProvider.java

package bndtools.shared;

import org.bndtools.core.ui.icons.Icons;
import org.eclipse.jface.viewers.StyledCellLabelProvider;
import org.eclipse.jface.viewers.StyledString;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.Image;

public class URLLabelProvider extends StyledCellLabelProvider {

    private final Image linkImg;
    private final Image fileImg;

    public URLLabelProvider(Device device) {
        linkImg = Icons.desc("link").createImage(device);
        fileImg = Icons.desc("file").createImage();
    }

    @Override
    public void update(ViewerCell cell) {
        Image img;
        String text;

        Object element = cell.getElement();
        if (element instanceof OBRLink) {
            StyledString label = ((OBRLink) element).getLabel();
            cell.setStyleRanges(label.getStyleRanges());
            text = label.getString();
        } else {
            text = (element == null ? "null" : element.toString());
        }

        if (text.startsWith("file:"))
            img = fileImg;
        else
            img = linkImg;

        cell.setText(text);
        cell.setImage(img);
    }

    @Override
    public void dispose() {
        super.dispose();
        linkImg.dispose();
        fileImg.dispose();
    }
}