| 1 | // License: GPL. For details, see LICENSE file. |
| 2 | package org.openstreetmap.josm.gui.dialogs.layer; |
| 3 | |
| 4 | import static org.openstreetmap.josm.tools.I18n.tr; |
| 5 | |
| 6 | import java.awt.Component; |
| 7 | import java.awt.event.ActionEvent; |
| 8 | import java.awt.event.KeyEvent; |
| 9 | import java.util.ArrayList; |
| 10 | import java.util.Collections; |
| 11 | import java.util.List; |
| 12 | import java.util.stream.Collectors; |
| 13 | |
| 14 | import javax.swing.JMenuItem; |
| 15 | |
| 16 | import org.openstreetmap.josm.actions.JosmAction; |
| 17 | import org.openstreetmap.josm.gui.MainApplication; |
| 18 | import org.openstreetmap.josm.gui.layer.ImageryLayer; |
| 19 | import org.openstreetmap.josm.gui.layer.Layer; |
| 20 | import org.openstreetmap.josm.gui.layer.Layer.LayerAction; |
| 21 | import org.openstreetmap.josm.gui.layer.MainLayerManager; |
| 22 | import org.openstreetmap.josm.tools.ImageProvider; |
| 23 | import org.openstreetmap.josm.tools.Shortcut; |
| 24 | |
| 25 | /** |
| 26 | * Allow users to cycle between adjacent layers easily |
| 27 | * |
| 28 | * @author Taylor Smock |
| 29 | * @since xxx |
| 30 | */ |
| 31 | public class CycleLayerAction extends JosmAction implements LayerAction { |
| 32 | private static Shortcut cycleUp = Shortcut.registerShortcut("core:cyclelayerup", tr("Cycle layers down"), |
| 33 | KeyEvent.VK_BRACELEFT, Shortcut.SHIFT); |
| 34 | private static Shortcut cycleDown = Shortcut.registerShortcut("core:cyclelayerdown", tr("Cycle layers up"), |
| 35 | KeyEvent.VK_BRACERIGHT, Shortcut.SHIFT); |
| 36 | |
| 37 | /** |
| 38 | * Create a CycleLayerAction that cycles through layers that are in the model |
| 39 | */ |
| 40 | public CycleLayerAction() { |
| 41 | super(tr("Cycle layers"), "dialogs/next", tr("Cycle through layers"), cycleDown, true, |
| 42 | "cycle-layer", false); |
| 43 | MainApplication.registerActionShortcut(this, cycleUp); // cycleDown gets registered by JosmAction |
| 44 | new ImageProvider("dialogs", "next").getResource().attachImageIcon(this, true); |
| 45 | putValue(SHORT_DESCRIPTION, tr("Cycle through visible layers.")); |
| 46 | putValue(NAME, tr("Cycle layers")); |
| 47 | } |
| 48 | |
| 49 | @Override |
| 50 | public void actionPerformed(ActionEvent e) { |
| 51 | MainLayerManager manager = MainApplication.getLayerManager(); |
| 52 | List<Layer> managerLayers = manager.getLayers().stream().filter(layer -> !(layer instanceof ImageryLayer)) |
| 53 | .collect(Collectors.toList()); |
| 54 | if (managerLayers.isEmpty()) |
| 55 | return; |
| 56 | int key = KeyEvent.getExtendedKeyCodeForChar(e.getActionCommand().charAt(0)); |
| 57 | Shortcut shortcut = Shortcut |
| 58 | .findShortcut(key, cycleDown.getAssignedModifier()) |
| 59 | .orElse(null); |
| 60 | |
| 61 | List<Layer> layers; |
| 62 | if (cycleDown.equals(shortcut)) { |
| 63 | int index = managerLayers.indexOf(manager.getActiveLayer()); |
| 64 | int sublist = index < managerLayers.size() ? index + 1 : index; |
| 65 | if (index >= managerLayers.size() - 1) { |
| 66 | index = 0; |
| 67 | sublist = 0; |
| 68 | } |
| 69 | layers = managerLayers.subList(sublist, managerLayers.size()); |
| 70 | } else { |
| 71 | layers = new ArrayList<>(managerLayers); |
| 72 | Collections.reverse(layers); |
| 73 | int index = layers.indexOf(manager.getActiveLayer()); |
| 74 | int sublist = index < managerLayers.size() - 1 ? index + 1 : 0; |
| 75 | layers = layers.subList(sublist, layers.size()); |
| 76 | } |
| 77 | Layer layer = layers.stream().filter(Layer::isVisible).filter(tlayer -> !(tlayer instanceof ImageryLayer)) |
| 78 | .findFirst() |
| 79 | .orElse(manager.getActiveLayer()); |
| 80 | |
| 81 | if (layer != null) |
| 82 | manager.setActiveLayer(layer); |
| 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public boolean supportLayers(List<Layer> layers) { |
| 87 | return true; |
| 88 | } |
| 89 | |
| 90 | @Override |
| 91 | public Component createMenuComponent() { |
| 92 | return new JMenuItem(this); |
| 93 | } |
| 94 | |
| 95 | @Override |
| 96 | public void destroy() { |
| 97 | super.destroy(); |
| 98 | MainApplication.unregisterActionShortcut(this, cycleUp); |
| 99 | } |
| 100 | } |