[8378] | 1 | // License: GPL. For details, see LICENSE file.
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[626] | 2 | package org.openstreetmap.josm.actions;
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| 3 |
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[6130] | 4 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
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[626] | 5 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 6 |
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| 7 | import java.awt.event.ActionEvent;
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| 8 | import java.awt.event.KeyEvent;
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[6919] | 9 | import java.util.ArrayList;
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[626] | 10 | import java.util.Collection;
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[6919] | 11 | import java.util.Collections;
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[6933] | 12 | import java.util.HashSet;
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[626] | 13 | import java.util.LinkedList;
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[1846] | 14 | import java.util.List;
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[8338] | 15 | import java.util.Set;
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[626] | 16 |
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| 17 | import javax.swing.JOptionPane;
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| 18 |
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| 19 | import org.openstreetmap.josm.Main;
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| 20 | import org.openstreetmap.josm.command.Command;
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| 21 | import org.openstreetmap.josm.command.MoveCommand;
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| 22 | import org.openstreetmap.josm.command.SequenceCommand;
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| 23 | import org.openstreetmap.josm.data.coor.EastNorth;
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[10382] | 24 | import org.openstreetmap.josm.data.osm.DataSet;
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[626] | 25 | import org.openstreetmap.josm.data.osm.Node;
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| 26 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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| 27 | import org.openstreetmap.josm.data.osm.Way;
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[6130] | 28 | import org.openstreetmap.josm.gui.Notification;
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[5125] | 29 | import org.openstreetmap.josm.tools.Geometry;
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[1084] | 30 | import org.openstreetmap.josm.tools.Shortcut;
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[626] | 31 |
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| 32 | /**
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[655] | 33 | * Aligns all selected nodes within a circle. (Useful for roundabouts)
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[1169] | 34 | *
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[626] | 35 | * @author Matthew Newton
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[1090] | 36 | * @author Petr Dlouhý
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[1947] | 37 | * @author Teemu Koskinen
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[6919] | 38 | * @author Alain Delplanque
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[8419] | 39 | *
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| 40 | * @since 146
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[626] | 41 | */
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| 42 | public final class AlignInCircleAction extends JosmAction {
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| 43 |
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[6230] | 44 | /**
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| 45 | * Constructs a new {@code AlignInCircleAction}.
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| 46 | */
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[1090] | 47 | public AlignInCircleAction() {
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[1169] | 48 | super(tr("Align Nodes in Circle"), "aligncircle", tr("Move the selected nodes into a circle."),
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| 49 | Shortcut.registerShortcut("tools:aligncircle", tr("Tool: {0}", tr("Align Nodes in Circle")),
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[4982] | 50 | KeyEvent.VK_O, Shortcut.DIRECT), true);
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[2323] | 51 | putValue("help", ht("/Action/AlignInCircle"));
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[1090] | 52 | }
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[626] | 53 |
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[6814] | 54 | private static double distance(EastNorth n, EastNorth m) {
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[1090] | 55 | double easd, nord;
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| 56 | easd = n.east() - m.east();
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| 57 | nord = n.north() - m.north();
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| 58 | return Math.sqrt(easd * easd + nord * nord);
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| 59 | }
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[626] | 60 |
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[6814] | 61 | public static class PolarCoor {
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[8285] | 62 | private double radius;
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| 63 | private double angle;
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| 64 | private EastNorth origin = new EastNorth(0, 0);
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[8840] | 65 | private double azimuth;
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[1090] | 66 |
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| 67 | PolarCoor(double radius, double angle) {
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| 68 | this(radius, angle, new EastNorth(0, 0), 0);
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| 69 | }
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| 70 |
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| 71 | PolarCoor(double radius, double angle, EastNorth origin, double azimuth) {
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| 72 | this.radius = radius;
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| 73 | this.angle = angle;
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| 74 | this.origin = origin;
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| 75 | this.azimuth = azimuth;
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| 76 | }
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| 77 |
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| 78 | PolarCoor(EastNorth en) {
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| 79 | this(en, new EastNorth(0, 0), 0);
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| 80 | }
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| 81 |
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| 82 | PolarCoor(EastNorth en, EastNorth origin, double azimuth) {
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| 83 | radius = distance(en, origin);
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| 84 | angle = Math.atan2(en.north() - origin.north(), en.east() - origin.east());
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| 85 | this.origin = origin;
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| 86 | this.azimuth = azimuth;
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| 87 | }
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| 88 |
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| 89 | public EastNorth toEastNorth() {
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| 90 | return new EastNorth(radius * Math.cos(angle - azimuth) + origin.east(), radius * Math.sin(angle - azimuth)
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| 91 | + origin.north());
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| 92 | }
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[6892] | 93 |
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| 94 | /**
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| 95 | * Create a MoveCommand to move a node to this PolarCoor.
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| 96 | * @param n Node to move
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| 97 | * @return new MoveCommand
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| 98 | */
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| 99 | public MoveCommand createMoveCommand(Node n) {
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| 100 | EastNorth en = toEastNorth();
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| 101 | return new MoveCommand(n, en.east() - n.getEastNorth().east(), en.north() - n.getEastNorth().north());
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| 102 | }
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[1090] | 103 | }
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| 104 |
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[7509] | 105 |
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[6933] | 106 | /**
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| 107 | * Perform AlignInCircle action.
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| 108 | *
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| 109 | * A fixed node is a node for which it is forbidden to change the angle relative to center of the circle.
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| 110 | * All other nodes are uniformly distributed.
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| 111 | *
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| 112 | * Case 1: One unclosed way.
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[8795] | 113 | * --> allow action, and align selected way nodes
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[6933] | 114 | * If nodes contained by this way are selected, there are fix.
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| 115 | * If nodes outside from the way are selected there are ignored.
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| 116 | *
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| 117 | * Case 2: One or more ways are selected and can be joined into a polygon
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[8795] | 118 | * --> allow action, and align selected ways nodes
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[6933] | 119 | * If 1 node outside of way is selected, it became center
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| 120 | * If 1 node outside and 1 node inside are selected there define center and radius
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| 121 | * If no outside node and 2 inside nodes are selected those 2 nodes define diameter
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| 122 | * In all other cases outside nodes are ignored
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| 123 | * In all cases, selected nodes are fix, nodes with more than one referrers are fix
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| 124 | * (first referrer is the selected way)
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| 125 | *
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| 126 | * Case 3: Only nodes are selected
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[8795] | 127 | * --> Align these nodes, all are fix
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[6933] | 128 | */
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[6084] | 129 | @Override
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[1090] | 130 | public void actionPerformed(ActionEvent e) {
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[1820] | 131 | if (!isEnabled())
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| 132 | return;
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| 133 |
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[10382] | 134 | Collection<OsmPrimitive> sel = getLayerManager().getEditDataSet().getSelected();
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[7005] | 135 | List<Node> nodes = new LinkedList<>();
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[6933] | 136 | // fixNodes: All nodes for which the angle relative to center should not be modified
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[8338] | 137 | Set<Node> fixNodes = new HashSet<>();
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[7005] | 138 | List<Way> ways = new LinkedList<>();
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[1636] | 139 | EastNorth center = null;
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[1090] | 140 | double radius = 0;
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[7509] | 141 |
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[1090] | 142 | for (OsmPrimitive osm : sel) {
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[1768] | 143 | if (osm instanceof Node) {
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[1090] | 144 | nodes.add((Node) osm);
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[1768] | 145 | } else if (osm instanceof Way) {
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[1090] | 146 | ways.add((Way) osm);
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[1768] | 147 | }
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[1090] | 148 | }
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| 149 |
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[8460] | 150 | if (ways.size() == 1 && !ways.get(0).isClosed()) {
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[6933] | 151 | // Case 1
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| 152 | Way w = ways.get(0);
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| 153 | fixNodes.add(w.firstNode());
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| 154 | fixNodes.add(w.lastNode());
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| 155 | fixNodes.addAll(nodes);
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| 156 | fixNodes.addAll(collectNodesWithExternReferers(ways));
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| 157 | // Temporary closed way used to reorder nodes
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| 158 | Way closedWay = new Way(w);
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| 159 | closedWay.addNode(w.firstNode());
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[8338] | 160 | List<Way> usedWays = new ArrayList<>(1);
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[6933] | 161 | usedWays.add(closedWay);
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| 162 | nodes = collectNodesAnticlockwise(usedWays);
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| 163 | } else if (!ways.isEmpty() && checkWaysArePolygon(ways)) {
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| 164 | // Case 2
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[8338] | 165 | List<Node> inside = new ArrayList<>();
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| 166 | List<Node> outside = new ArrayList<>();
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[7509] | 167 |
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[8510] | 168 | for (Node n: nodes) {
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[6933] | 169 | boolean isInside = false;
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[8510] | 170 | for (Way w: ways) {
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| 171 | if (w.getNodes().contains(n)) {
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[6933] | 172 | isInside = true;
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| 173 | break;
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[1768] | 174 | }
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[1090] | 175 | }
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[8510] | 176 | if (isInside)
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[6933] | 177 | inside.add(n);
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| 178 | else
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| 179 | outside.add(n);
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[1090] | 180 | }
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[7509] | 181 |
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[8510] | 182 | if (outside.size() == 1 && inside.isEmpty()) {
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[6933] | 183 | center = outside.get(0).getEastNorth();
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[8510] | 184 | } else if (outside.size() == 1 && inside.size() == 1) {
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[6933] | 185 | center = outside.get(0).getEastNorth();
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| 186 | radius = distance(center, inside.get(0).getEastNorth());
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[8510] | 187 | } else if (inside.size() == 2 && outside.isEmpty()) {
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[6933] | 188 | // 2 nodes inside, define diameter
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| 189 | EastNorth en0 = inside.get(0).getEastNorth();
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| 190 | EastNorth en1 = inside.get(1).getEastNorth();
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| 191 | center = new EastNorth((en0.east() + en1.east()) / 2, (en0.north() + en1.north()) / 2);
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| 192 | radius = distance(en0, en1) / 2;
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| 193 | }
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[7509] | 194 |
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[6933] | 195 | fixNodes.addAll(inside);
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| 196 | fixNodes.addAll(collectNodesWithExternReferers(ways));
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[6919] | 197 | nodes = collectNodesAnticlockwise(ways);
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[6933] | 198 | if (nodes.size() < 4) {
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| 199 | new Notification(
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| 200 | tr("Not enough nodes in selected ways."))
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| 201 | .setIcon(JOptionPane.INFORMATION_MESSAGE)
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| 202 | .setDuration(Notification.TIME_SHORT)
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| 203 | .show();
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| 204 | return;
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| 205 | }
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| 206 | } else if (ways.isEmpty() && nodes.size() > 3) {
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| 207 | // Case 3
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| 208 | fixNodes.addAll(nodes);
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| 209 | // No need to reorder nodes since all are fix
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| 210 | } else {
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| 211 | // Invalid action
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[6130] | 212 | new Notification(
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| 213 | tr("Please select at least four nodes."))
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| 214 | .setIcon(JOptionPane.INFORMATION_MESSAGE)
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| 215 | .setDuration(Notification.TIME_SHORT)
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| 216 | .show();
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[1090] | 217 | return;
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| 218 | }
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| 219 |
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[6919] | 220 | if (center == null) {
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[6934] | 221 | // Compute the center of nodes
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| 222 | center = Geometry.getCenter(nodes);
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| 223 | if (center == null) {
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| 224 | new Notification(tr("Cannot determine center of selected nodes."))
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| 225 | .setIcon(JOptionPane.INFORMATION_MESSAGE)
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| 226 | .setDuration(Notification.TIME_SHORT)
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| 227 | .show();
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| 228 | return;
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| 229 | }
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[6919] | 230 | }
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[7509] | 231 |
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[1090] | 232 | // Now calculate the average distance to each node from the
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[6933] | 233 | // center. This method is ok as long as distances are short
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[1090] | 234 | // relative to the distance from the N or S poles.
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[8393] | 235 | if (radius == 0) {
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[1090] | 236 | for (Node n : nodes) {
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[1640] | 237 | radius += distance(center, n.getEastNorth());
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[1090] | 238 | }
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| 239 | radius = radius / nodes.size();
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| 240 | }
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| 241 |
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[8510] | 242 | if (!actionAllowed(nodes)) return;
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[6892] | 243 |
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[7005] | 244 | Collection<Command> cmds = new LinkedList<>();
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[1090] | 245 |
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[6919] | 246 | // Move each node to that distance from the center.
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[7509] | 247 | // Nodes that are not "fix" will be adjust making regular arcs.
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[6919] | 248 | int nodeCount = nodes.size();
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| 249 | // Search first fixed node
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[10308] | 250 | int startPosition;
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[8513] | 251 | for (startPosition = 0; startPosition < nodeCount; startPosition++) {
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| 252 | if (fixNodes.contains(nodes.get(startPosition % nodeCount)))
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| 253 | break;
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| 254 | }
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[6919] | 255 | int i = startPosition; // Start position for current arc
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| 256 | int j; // End position for current arc
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[8510] | 257 | while (i < startPosition + nodeCount) {
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[8513] | 258 | for (j = i + 1; j < startPosition + nodeCount; j++) {
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| 259 | if (fixNodes.contains(nodes.get(j % nodeCount)))
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| 260 | break;
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| 261 | }
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[6919] | 262 | Node first = nodes.get(i % nodeCount);
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| 263 | PolarCoor pcFirst = new PolarCoor(first.getEastNorth(), center, 0);
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| 264 | pcFirst.radius = radius;
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| 265 | cmds.add(pcFirst.createMoveCommand(first));
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[8510] | 266 | if (j > i + 1) {
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[6919] | 267 | double delta;
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[8510] | 268 | if (j == i + nodeCount) {
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[6919] | 269 | delta = 2 * Math.PI / nodeCount;
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| 270 | } else {
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| 271 | PolarCoor pcLast = new PolarCoor(nodes.get(j % nodeCount).getEastNorth(), center, 0);
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| 272 | delta = pcLast.angle - pcFirst.angle;
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[8510] | 273 | if (delta < 0) // Assume each PolarCoor.angle is in range ]-pi; pi]
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[10378] | 274 | delta += 2*Math.PI;
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[6919] | 275 | delta /= j - i;
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[6892] | 276 | }
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[8510] | 277 | for (int k = i+1; k < j; k++) {
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[6919] | 278 | PolarCoor p = new PolarCoor(radius, pcFirst.angle + (k-i)*delta, center, 0);
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| 279 | cmds.add(p.createMoveCommand(nodes.get(k % nodeCount)));
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| 280 | }
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[1090] | 281 | }
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[6919] | 282 | i = j; // Update start point for next iteration
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[1090] | 283 | }
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[7509] | 284 |
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[1090] | 285 | Main.main.undoRedo.add(new SequenceCommand(tr("Align Nodes in Circle"), cmds));
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| 286 | }
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[1820] | 287 |
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[6892] | 288 | /**
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[6933] | 289 | * Collect all nodes with more than one referrer.
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| 290 | * @param ways Ways from witch nodes are selected
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| 291 | * @return List of nodes with more than one referrer
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| 292 | */
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[8870] | 293 | private static List<Node> collectNodesWithExternReferers(List<Way> ways) {
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[8338] | 294 | List<Node> withReferrers = new ArrayList<>();
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[8513] | 295 | for (Way w: ways) {
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| 296 | for (Node n: w.getNodes()) {
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| 297 | if (n.getReferrers().size() > 1) {
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[6933] | 298 | withReferrers.add(n);
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[8513] | 299 | }
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| 300 | }
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| 301 | }
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[6933] | 302 | return withReferrers;
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| 303 | }
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[7509] | 304 |
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[6933] | 305 | /**
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[6919] | 306 | * Assuming all ways can be joined into polygon, create an ordered list of node.
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| 307 | * @param ways List of ways to be joined
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| 308 | * @return Nodes anticlockwise ordered
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| 309 | */
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[8870] | 310 | private static List<Node> collectNodesAnticlockwise(List<Way> ways) {
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[8338] | 311 | List<Node> nodes = new ArrayList<>();
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[6919] | 312 | Node firstNode = ways.get(0).firstNode();
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| 313 | Node lastNode = null;
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| 314 | Way lastWay = null;
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[10662] | 315 | while (firstNode != lastNode) {
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[8510] | 316 | if (lastNode == null) lastNode = firstNode;
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| 317 | for (Way way: ways) {
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[10662] | 318 | if (way == lastWay) continue;
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| 319 | if (way.firstNode() == lastNode) {
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[6919] | 320 | List<Node> wayNodes = way.getNodes();
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[8513] | 321 | for (int i = 0; i < wayNodes.size() - 1; i++) {
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[6919] | 322 | nodes.add(wayNodes.get(i));
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[8513] | 323 | }
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[6919] | 324 | lastNode = way.lastNode();
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| 325 | lastWay = way;
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| 326 | break;
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| 327 | }
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[10662] | 328 | if (way.lastNode() == lastNode) {
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[6919] | 329 | List<Node> wayNodes = way.getNodes();
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[8513] | 330 | for (int i = wayNodes.size() - 1; i > 0; i--) {
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[6919] | 331 | nodes.add(wayNodes.get(i));
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[8513] | 332 | }
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[6919] | 333 | lastNode = way.firstNode();
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| 334 | lastWay = way;
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| 335 | break;
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| 336 | }
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| 337 | }
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| 338 | }
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| 339 | // Check if nodes are in anticlockwise order
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| 340 | int nc = nodes.size();
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| 341 | double area = 0;
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[8510] | 342 | for (int i = 0; i < nc; i++) {
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[6919] | 343 | EastNorth p1 = nodes.get(i).getEastNorth();
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| 344 | EastNorth p2 = nodes.get((i+1) % nc).getEastNorth();
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| 345 | area += p1.east()*p2.north() - p2.east()*p1.north();
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| 346 | }
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[8510] | 347 | if (area < 0)
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[6919] | 348 | Collections.reverse(nodes);
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| 349 | return nodes;
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| 350 | }
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| 351 |
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| 352 | /**
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[6892] | 353 | * Check if one or more nodes are outside of download area
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| 354 | * @param nodes Nodes to check
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| 355 | * @return true if action can be done
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| 356 | */
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[8870] | 357 | private static boolean actionAllowed(Collection<Node> nodes) {
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[6892] | 358 | boolean outside = false;
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[8513] | 359 | for (Node n: nodes) {
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[8510] | 360 | if (n.isOutsideDownloadArea()) {
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[6892] | 361 | outside = true;
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| 362 | break;
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| 363 | }
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[8513] | 364 | }
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[8510] | 365 | if (outside)
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[6892] | 366 | new Notification(
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| 367 | tr("One or more nodes involved in this action is outside of the downloaded area."))
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| 368 | .setIcon(JOptionPane.WARNING_MESSAGE)
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| 369 | .setDuration(Notification.TIME_SHORT)
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| 370 | .show();
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| 371 | return true;
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| 372 | }
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[7509] | 373 |
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[1820] | 374 | @Override
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| 375 | protected void updateEnabledState() {
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[10382] | 376 | DataSet ds = getLayerManager().getEditDataSet();
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[10383] | 377 | setEnabled(ds != null && !ds.selectionEmpty());
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[1820] | 378 | }
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[2256] | 379 |
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| 380 | @Override
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| 381 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
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| 382 | setEnabled(selection != null && !selection.isEmpty());
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| 383 | }
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[6069] | 384 |
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[5719] | 385 | /**
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[6892] | 386 | * Determines if ways can be joined into a polygon.
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| 387 | * @param ways The ways collection to check
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| 388 | * @return true if all ways can be joined into a polygon
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| 389 | */
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[10763] | 390 | private static boolean checkWaysArePolygon(Collection<Way> ways) {
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[6892] | 391 | // For each way, nodes strictly between first and last should't be reference by an other way
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[8460] | 392 | for (Way way: ways) {
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| 393 | for (Node node: way.getNodes()) {
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| 394 | if (way.isFirstLastNode(node)) continue;
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| 395 | for (Way wayOther: ways) {
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[10662] | 396 | if (way == wayOther) continue;
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[8460] | 397 | if (node.getReferrers().contains(wayOther)) return false;
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[6892] | 398 | }
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| 399 | }
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| 400 | }
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| 401 | // Test if ways can be joined
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| 402 | Way currentWay = null;
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| 403 | Node startNode = null, endNode = null;
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| 404 | int used = 0;
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[8460] | 405 | while (true) {
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[6892] | 406 | Way nextWay = null;
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[8460] | 407 | for (Way w: ways) {
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| 408 | if (w.isClosed()) return ways.size() == 1;
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[10662] | 409 | if (w == currentWay) continue;
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[8460] | 410 | if (currentWay == null) {
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[6892] | 411 | nextWay = w;
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| 412 | startNode = w.firstNode();
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| 413 | endNode = w.lastNode();
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| 414 | break;
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| 415 | }
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[10662] | 416 | if (w.firstNode() == endNode) {
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[6892] | 417 | nextWay = w;
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| 418 | endNode = w.lastNode();
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| 419 | break;
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| 420 | }
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[10662] | 421 | if (w.lastNode() == endNode) {
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[6892] | 422 | nextWay = w;
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| 423 | endNode = w.firstNode();
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| 424 | break;
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| 425 | }
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| 426 | }
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[8460] | 427 | if (nextWay == null) return false;
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[6892] | 428 | used += 1;
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| 429 | currentWay = nextWay;
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[10662] | 430 | if (endNode == startNode) return used == ways.size();
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[6892] | 431 | }
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| 432 | }
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[626] | 433 | }
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