001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.actions;
003
004import static org.openstreetmap.josm.tools.I18n.tr;
005
006import java.awt.event.ActionEvent;
007import java.util.List;
008import java.util.stream.Collectors;
009import java.util.stream.Stream;
010
011import org.openstreetmap.josm.gui.layer.ImageryLayer;
012import org.openstreetmap.josm.tools.KeyboardUtils;
013import org.openstreetmap.josm.tools.Shortcut;
014
015/**
016 * Reorders all non-overlay imagery layers in a cyclic manner.
017 * @since 13891
018 */
019public class ReorderImageryLayersAction extends JosmAction {
020
021    /**
022     * Constructs a new {@code ReorderImageryLayersAction}.
023     */
024    public ReorderImageryLayersAction() {
025        // TODO: find a suitable icon
026        super(tr("Reorder imagery layers"), "dialogs/layerlist", tr("Reorders non-overlay imagery layers."),
027            Shortcut.registerMultiShortcuts("imagery:reorder", tr("Reorder imagery layers"),
028                    KeyboardUtils.getCharactersForKey('E', 0), Shortcut.DIRECT));
029    }
030
031    @Override
032    public void actionPerformed(ActionEvent e) {
033        List<ImageryLayer> layers = getNonOverlayImageryLayers().collect(Collectors.toList());
034        int size = layers.size();
035        if (size > 1) {
036            // Move the first non-overlay layer at the position of the last non-overlay layer
037            getLayerManager().moveLayer(layers.get(0),
038                    getLayerManager().getLayers().indexOf(layers.get(size - 1)));
039        }
040    }
041
042    @Override
043    protected void updateEnabledState() {
044        setEnabled(getNonOverlayImageryLayers().count() > 1);
045    }
046
047    private Stream<ImageryLayer> getNonOverlayImageryLayers() {
048        return getLayerManager().getLayersOfType(ImageryLayer.class).stream()
049                .filter(l -> !l.getInfo().isOverlay());
050    }
051}