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        super(tr("Reorder imagery layers"), "dialogs/reorderlayers", tr("Reorders non-overlay imagery layers."),
026            Shortcut.registerMultiShortcuts("imagery:reorder", tr("Reorder imagery layers"),
027                    KeyboardUtils.getCharactersForKey('E', 0), Shortcut.DIRECT));
028    }
029
030    @Override
031    public void actionPerformed(ActionEvent e) {
032        List<ImageryLayer> layers = getNonOverlayImageryLayers().collect(Collectors.toList());
033        int size = layers.size();
034        if (size > 1) {
035            // Move the first non-overlay layer at the position of the last non-overlay layer
036            getLayerManager().moveLayer(layers.get(0),
037                    getLayerManager().getLayers().indexOf(layers.get(size - 1)));
038        }
039    }
040
041    @Override
042    protected void updateEnabledState() {
043        setEnabled(getNonOverlayImageryLayers().count() > 1);
044    }
045
046    private Stream<ImageryLayer> getNonOverlayImageryLayers() {
047        return getLayerManager().getLayersOfType(ImageryLayer.class).stream()
048                .filter(l -> !l.getInfo().isOverlay());
049    }
050}