source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/DrawAction.java@ 12630

Last change on this file since 12630 was 12630, checked in by Don-vip, 7 years ago

see #15182 - deprecate Main.map and Main.isDisplayingMapView(). Replacements: gui.MainApplication.getMap() / gui.MainApplication.isDisplayingMapView()
  • Property svn:eol-style set to native
File size: 52.9 KB
Line 
1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.actions.mapmode;
3
4import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
5import static org.openstreetmap.josm.tools.I18n.marktr;
6import static org.openstreetmap.josm.tools.I18n.tr;
7import static org.openstreetmap.josm.tools.I18n.trn;
8
9import java.awt.BasicStroke;
10import java.awt.Color;
11import java.awt.Cursor;
12import java.awt.Graphics2D;
13import java.awt.Point;
14import java.awt.event.ActionEvent;
15import java.awt.event.KeyEvent;
16import java.awt.event.MouseEvent;
17import java.util.ArrayList;
18import java.util.Collection;
19import java.util.Collections;
20import java.util.HashMap;
21import java.util.HashSet;
22import java.util.Iterator;
23import java.util.LinkedList;
24import java.util.List;
25import java.util.Map;
26import java.util.Set;
27
28import javax.swing.AbstractAction;
29import javax.swing.JCheckBoxMenuItem;
30import javax.swing.JMenuItem;
31import javax.swing.JOptionPane;
32
33import org.openstreetmap.josm.Main;
34import org.openstreetmap.josm.actions.JosmAction;
35import org.openstreetmap.josm.command.AddCommand;
36import org.openstreetmap.josm.command.ChangeCommand;
37import org.openstreetmap.josm.command.Command;
38import org.openstreetmap.josm.command.SequenceCommand;
39import org.openstreetmap.josm.data.Bounds;
40import org.openstreetmap.josm.data.coor.EastNorth;
41import org.openstreetmap.josm.data.osm.DataSelectionListener;
42import org.openstreetmap.josm.data.osm.DataSet;
43import org.openstreetmap.josm.data.osm.Node;
44import org.openstreetmap.josm.data.osm.OsmPrimitive;
45import org.openstreetmap.josm.data.osm.Way;
46import org.openstreetmap.josm.data.osm.WaySegment;
47import org.openstreetmap.josm.data.osm.event.SelectionEventManager;
48import org.openstreetmap.josm.data.osm.visitor.paint.ArrowPaintHelper;
49import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
50import org.openstreetmap.josm.data.preferences.AbstractToStringProperty;
51import org.openstreetmap.josm.data.preferences.BooleanProperty;
52import org.openstreetmap.josm.data.preferences.CachingProperty;
53import org.openstreetmap.josm.data.preferences.ColorProperty;
54import org.openstreetmap.josm.data.preferences.DoubleProperty;
55import org.openstreetmap.josm.data.preferences.StrokeProperty;
56import org.openstreetmap.josm.gui.MainApplication;
57import org.openstreetmap.josm.gui.MainMenu;
58import org.openstreetmap.josm.gui.MapFrame;
59import org.openstreetmap.josm.gui.MapView;
60import org.openstreetmap.josm.gui.MapViewState.MapViewPoint;
61import org.openstreetmap.josm.gui.NavigatableComponent;
62import org.openstreetmap.josm.gui.draw.MapPath2D;
63import org.openstreetmap.josm.gui.layer.Layer;
64import org.openstreetmap.josm.gui.layer.MapViewPaintable;
65import org.openstreetmap.josm.gui.layer.OsmDataLayer;
66import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
67import org.openstreetmap.josm.gui.util.ModifierExListener;
68import org.openstreetmap.josm.tools.Geometry;
69import org.openstreetmap.josm.tools.ImageProvider;
70import org.openstreetmap.josm.tools.Pair;
71import org.openstreetmap.josm.tools.Shortcut;
72import org.openstreetmap.josm.tools.Utils;
73
74/**
75 * Mapmode to add nodes, create and extend ways.
76 */
77public class DrawAction extends MapMode implements MapViewPaintable, DataSelectionListener, KeyPressReleaseListener, ModifierExListener {
78
79 /**
80 * If this property is set, the draw action moves the viewport when adding new points.
81 * @since 12182
82 */
83 public static final CachingProperty<Boolean> VIEWPORT_FOLLOWING = new BooleanProperty("draw.viewport.following", false).cached();
84
85 private static final Color ORANGE_TRANSPARENT = new Color(Color.ORANGE.getRed(), Color.ORANGE.getGreen(), Color.ORANGE.getBlue(), 128);
86
87 private static final ArrowPaintHelper START_WAY_INDICATOR = new ArrowPaintHelper(Utils.toRadians(90), 8);
88
89 static final CachingProperty<Boolean> USE_REPEATED_SHORTCUT
90 = new BooleanProperty("draw.anglesnap.toggleOnRepeatedA", true).cached();
91 static final CachingProperty<BasicStroke> RUBBER_LINE_STROKE
92 = new StrokeProperty("draw.stroke.helper-line", "3").cached();
93
94 static final CachingProperty<BasicStroke> HIGHLIGHT_STROKE
95 = new StrokeProperty("draw.anglesnap.stroke.highlight", "10").cached();
96 static final CachingProperty<BasicStroke> HELPER_STROKE
97 = new StrokeProperty("draw.anglesnap.stroke.helper", "1 4").cached();
98
99 static final CachingProperty<Double> SNAP_ANGLE_TOLERANCE
100 = new DoubleProperty("draw.anglesnap.tolerance", 5.0).cached();
101 static final CachingProperty<Boolean> DRAW_CONSTRUCTION_GEOMETRY
102 = new BooleanProperty("draw.anglesnap.drawConstructionGeometry", true).cached();
103 static final CachingProperty<Boolean> SHOW_PROJECTED_POINT
104 = new BooleanProperty("draw.anglesnap.drawProjectedPoint", true).cached();
105 static final CachingProperty<Boolean> SNAP_TO_PROJECTIONS
106 = new BooleanProperty("draw.anglesnap.projectionsnap", true).cached();
107
108 static final CachingProperty<Boolean> SHOW_ANGLE
109 = new BooleanProperty("draw.anglesnap.showAngle", true).cached();
110
111 static final CachingProperty<Color> SNAP_HELPER_COLOR
112 = new ColorProperty(marktr("draw angle snap"), Color.ORANGE).cached();
113
114 static final CachingProperty<Color> HIGHLIGHT_COLOR
115 = new ColorProperty(marktr("draw angle snap highlight"), ORANGE_TRANSPARENT).cached();
116
117 static final AbstractToStringProperty<Color> RUBBER_LINE_COLOR
118 = PaintColors.SELECTED.getProperty().getChildColor(marktr("helper line"));
119
120 static final CachingProperty<Boolean> DRAW_HELPER_LINE
121 = new BooleanProperty("draw.helper-line", true).cached();
122 static final CachingProperty<Boolean> DRAW_TARGET_HIGHLIGHT
123 = new BooleanProperty("draw.target-highlight", true).cached();
124 static final CachingProperty<Double> SNAP_TO_INTERSECTION_THRESHOLD
125 = new DoubleProperty("edit.snap-intersection-threshold", 10).cached();
126
127 private final Cursor cursorJoinNode;
128 private final Cursor cursorJoinWay;
129
130 private transient Node lastUsedNode;
131 private double toleranceMultiplier;
132
133 private transient Node mouseOnExistingNode;
134 private transient Set<Way> mouseOnExistingWays = new HashSet<>();
135 // old highlights store which primitives are currently highlighted. This
136 // is true, even if target highlighting is disabled since the status bar
137 // derives its information from this list as well.
138 private transient Set<OsmPrimitive> oldHighlights = new HashSet<>();
139 // new highlights contains a list of primitives that should be highlighted
140 // but haven't been so far. The idea is to compare old and new and only
141 // repaint if there are changes.
142 private transient Set<OsmPrimitive> newHighlights = new HashSet<>();
143 private boolean wayIsFinished;
144 private Point mousePos;
145 private Point oldMousePos;
146
147 private transient Node currentBaseNode;
148 private transient Node previousNode;
149 private EastNorth currentMouseEastNorth;
150
151 private final transient DrawSnapHelper snapHelper = new DrawSnapHelper(this);
152
153 private final transient Shortcut backspaceShortcut;
154 private final BackSpaceAction backspaceAction;
155 private final transient Shortcut snappingShortcut;
156 private boolean ignoreNextKeyRelease;
157
158 private final SnapChangeAction snapChangeAction;
159 private final JCheckBoxMenuItem snapCheckboxMenuItem;
160 private static final BasicStroke BASIC_STROKE = new BasicStroke(1);
161
162 private Point rightClickPressPos;
163
164 /**
165 * Constructs a new {@code DrawAction}.
166 * @since 11713
167 */
168 public DrawAction() {
169 super(tr("Draw"), "node/autonode", tr("Draw nodes"),
170 Shortcut.registerShortcut("mapmode:draw", tr("Mode: {0}", tr("Draw")), KeyEvent.VK_A, Shortcut.DIRECT),
171 ImageProvider.getCursor("crosshair", null));
172
173 snappingShortcut = Shortcut.registerShortcut("mapmode:drawanglesnapping",
174 tr("Mode: Draw Angle snapping"), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
175 snapChangeAction = new SnapChangeAction();
176 snapCheckboxMenuItem = addMenuItem();
177 snapHelper.setMenuCheckBox(snapCheckboxMenuItem);
178 backspaceShortcut = Shortcut.registerShortcut("mapmode:backspace",
179 tr("Backspace in Add mode"), KeyEvent.VK_BACK_SPACE, Shortcut.DIRECT);
180 backspaceAction = new BackSpaceAction();
181 cursorJoinNode = ImageProvider.getCursor("crosshair", "joinnode");
182 cursorJoinWay = ImageProvider.getCursor("crosshair", "joinway");
183
184 snapHelper.init();
185 }
186
187 private JCheckBoxMenuItem addMenuItem() {
188 int n = Main.main.menu.editMenu.getItemCount();
189 for (int i = n-1; i > 0; i--) {
190 JMenuItem item = Main.main.menu.editMenu.getItem(i);
191 if (item != null && item.getAction() != null && item.getAction() instanceof SnapChangeAction) {
192 Main.main.menu.editMenu.remove(i);
193 }
194 }
195 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, snapChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
196 }
197
198 /**
199 * Checks if a map redraw is required and does so if needed. Also updates the status bar.
200 * @return true if a repaint is needed
201 */
202 private boolean redrawIfRequired() {
203 updateStatusLine();
204 // repaint required if the helper line is active.
205 boolean needsRepaint = DRAW_HELPER_LINE.get() && !wayIsFinished;
206 if (DRAW_TARGET_HIGHLIGHT.get()) {
207 // move newHighlights to oldHighlights; only update changed primitives
208 for (OsmPrimitive x : newHighlights) {
209 if (oldHighlights.contains(x)) {
210 continue;
211 }
212 x.setHighlighted(true);
213 needsRepaint = true;
214 }
215 oldHighlights.removeAll(newHighlights);
216 for (OsmPrimitive x : oldHighlights) {
217 x.setHighlighted(false);
218 needsRepaint = true;
219 }
220 }
221 // required in order to print correct help text
222 oldHighlights = newHighlights;
223
224 if (!needsRepaint && !DRAW_TARGET_HIGHLIGHT.get())
225 return false;
226
227 // update selection to reflect which way being modified
228 OsmDataLayer editLayer = getLayerManager().getEditLayer();
229 if (editLayer != null && getCurrentBaseNode() != null && !editLayer.data.selectionEmpty()) {
230 DataSet currentDataSet = editLayer.data;
231 Way continueFrom = getWayForNode(getCurrentBaseNode());
232 if (alt && continueFrom != null && (!getCurrentBaseNode().isSelected() || continueFrom.isSelected())) {
233 addRemoveSelection(currentDataSet, getCurrentBaseNode(), continueFrom);
234 needsRepaint = true;
235 } else if (!alt && continueFrom != null && !continueFrom.isSelected()) {
236 currentDataSet.addSelected(continueFrom);
237 needsRepaint = true;
238 }
239 }
240
241 if (needsRepaint && editLayer != null) {
242 editLayer.invalidate();
243 }
244 return needsRepaint;
245 }
246
247 private static void addRemoveSelection(DataSet ds, OsmPrimitive toAdd, OsmPrimitive toRemove) {
248 ds.beginUpdate(); // to prevent the selection listener to screw around with the state
249 try {
250 ds.addSelected(toAdd);
251 ds.clearSelection(toRemove);
252 } finally {
253 ds.endUpdate();
254 }
255 }
256
257 @Override
258 public void enterMode() {
259 if (!isEnabled())
260 return;
261 super.enterMode();
262 readPreferences();
263
264 // determine if selection is suitable to continue drawing. If it
265 // isn't, set wayIsFinished to true to avoid superfluous repaints.
266 determineCurrentBaseNodeAndPreviousNode(getLayerManager().getEditDataSet().getSelected());
267 wayIsFinished = getCurrentBaseNode() == null;
268
269 toleranceMultiplier = 0.01 * NavigatableComponent.PROP_SNAP_DISTANCE.get();
270
271 snapHelper.init();
272 snapCheckboxMenuItem.getAction().setEnabled(true);
273
274 MapFrame map = MainApplication.getMap();
275 map.statusLine.getAnglePanel().addMouseListener(snapHelper.anglePopupListener);
276 Main.registerActionShortcut(backspaceAction, backspaceShortcut);
277
278 map.mapView.addMouseListener(this);
279 map.mapView.addMouseMotionListener(this);
280 map.mapView.addTemporaryLayer(this);
281 SelectionEventManager.getInstance().addSelectionListenerForEdt(this);
282
283 map.keyDetector.addKeyListener(this);
284 map.keyDetector.addModifierExListener(this);
285 ignoreNextKeyRelease = true;
286 }
287
288 @Override
289 public void exitMode() {
290 super.exitMode();
291 MapFrame map = MainApplication.getMap();
292 map.mapView.removeMouseListener(this);
293 map.mapView.removeMouseMotionListener(this);
294 map.mapView.removeTemporaryLayer(this);
295 SelectionEventManager.getInstance().removeSelectionListener(this);
296 Main.unregisterActionShortcut(backspaceAction, backspaceShortcut);
297 snapHelper.unsetFixedMode();
298 snapCheckboxMenuItem.getAction().setEnabled(false);
299
300 map.statusLine.getAnglePanel().removeMouseListener(snapHelper.anglePopupListener);
301 map.statusLine.activateAnglePanel(false);
302
303 removeHighlighting();
304 map.keyDetector.removeKeyListener(this);
305 map.keyDetector.removeModifierExListener(this);
306 }
307
308 /**
309 * redraw to (possibly) get rid of helper line if selection changes.
310 */
311 @Override
312 public void modifiersExChanged(int modifiers) {
313 if (!MainApplication.isDisplayingMapView() || !MainApplication.getMap().mapView.isActiveLayerDrawable())
314 return;
315 updateKeyModifiersEx(modifiers);
316 computeHelperLine();
317 addHighlighting();
318 }
319
320 @Override
321 public void doKeyPressed(KeyEvent e) {
322 if (!snappingShortcut.isEvent(e) && !(USE_REPEATED_SHORTCUT.get() && getShortcut().isEvent(e)))
323 return;
324 snapHelper.setFixedMode();
325 computeHelperLine();
326 redrawIfRequired();
327 }
328
329 @Override
330 public void doKeyReleased(KeyEvent e) {
331 if (!snappingShortcut.isEvent(e) && !(USE_REPEATED_SHORTCUT.get() && getShortcut().isEvent(e)))
332 return;
333 if (ignoreNextKeyRelease) {
334 ignoreNextKeyRelease = false;
335 return;
336 }
337 snapHelper.unFixOrTurnOff();
338 computeHelperLine();
339 redrawIfRequired();
340 }
341
342 /**
343 * redraw to (possibly) get rid of helper line if selection changes.
344 */
345 @Override
346 public void selectionChanged(SelectionChangeEvent event) {
347 if (!MainApplication.getMap().mapView.isActiveLayerDrawable())
348 return;
349 computeHelperLine();
350 addHighlighting();
351 }
352
353 private void tryAgain(MouseEvent e) {
354 getLayerManager().getEditDataSet().setSelected();
355 mouseReleased(e);
356 }
357
358 /**
359 * This function should be called when the user wishes to finish his current draw action.
360 * If Potlatch Style is enabled, it will switch to select tool, otherwise simply disable
361 * the helper line until the user chooses to draw something else.
362 */
363 private void finishDrawing() {
364 lastUsedNode = null;
365 wayIsFinished = true;
366 MainApplication.getMap().selectSelectTool(true);
367 snapHelper.noSnapNow();
368
369 // Redraw to remove the helper line stub
370 computeHelperLine();
371 removeHighlighting();
372 }
373
374 @Override
375 public void mousePressed(MouseEvent e) {
376 if (e.getButton() == MouseEvent.BUTTON3) {
377 rightClickPressPos = e.getPoint();
378 }
379 }
380
381 /**
382 * If user clicked with the left button, add a node at the current mouse
383 * position.
384 *
385 * If in nodeway mode, insert the node into the way.
386 */
387 @Override
388 public void mouseReleased(MouseEvent e) {
389 if (e.getButton() == MouseEvent.BUTTON3) {
390 Point curMousePos = e.getPoint();
391 if (curMousePos.equals(rightClickPressPos)) {
392 tryToSetBaseSegmentForAngleSnap();
393 }
394 return;
395 }
396 if (e.getButton() != MouseEvent.BUTTON1)
397 return;
398 MapView mapView = MainApplication.getMap().mapView;
399 if (!mapView.isActiveLayerDrawable())
400 return;
401 // request focus in order to enable the expected keyboard shortcuts
402 //
403 mapView.requestFocus();
404
405 if (e.getClickCount() > 1 && mousePos != null && mousePos.equals(oldMousePos)) {
406 // A double click equals "user clicked last node again, finish way"
407 // Change draw tool only if mouse position is nearly the same, as
408 // otherwise fast clicks will count as a double click
409 finishDrawing();
410 return;
411 }
412 oldMousePos = mousePos;
413
414 // we copy ctrl/alt/shift from the event just in case our global
415 // keyDetector didn't make it through the security manager. Unclear
416 // if that can ever happen but better be safe.
417 updateKeyModifiers(e);
418 mousePos = e.getPoint();
419
420 DataSet ds = getLayerManager().getEditDataSet();
421 Collection<OsmPrimitive> selection = new ArrayList<>(ds.getSelected());
422
423 boolean newNode = false;
424 Node n = mapView.getNearestNode(mousePos, OsmPrimitive::isSelectable);
425 if (ctrl) {
426 Iterator<Way> it = ds.getSelectedWays().iterator();
427 if (it.hasNext()) {
428 // ctrl-click on node of selected way = reuse node despite of ctrl
429 if (!it.next().containsNode(n)) n = null;
430 } else {
431 n = null; // ctrl-click + no selected way = new node
432 }
433 }
434
435 if (n != null && !snapHelper.isActive()) {
436 // user clicked on node
437 if (selection.isEmpty() || wayIsFinished) {
438 // select the clicked node and do nothing else
439 // (this is just a convenience option so that people don't
440 // have to switch modes)
441
442 ds.setSelected(n);
443 // If we extend/continue an existing way, select it already now to make it obvious
444 Way continueFrom = getWayForNode(n);
445 if (continueFrom != null) {
446 ds.addSelected(continueFrom);
447 }
448
449 // The user explicitly selected a node, so let him continue drawing
450 wayIsFinished = false;
451 return;
452 }
453 } else {
454 EastNorth newEN;
455 if (n != null) {
456 EastNorth foundPoint = n.getEastNorth();
457 // project found node to snapping line
458 newEN = snapHelper.getSnapPoint(foundPoint);
459 // do not add new node if there is some node within snapping distance
460 double tolerance = mapView.getDist100Pixel() * toleranceMultiplier;
461 if (foundPoint.distance(newEN) > tolerance) {
462 n = new Node(newEN); // point != projected, so we create new node
463 newNode = true;
464 }
465 } else { // n==null, no node found in clicked area
466 EastNorth mouseEN = mapView.getEastNorth(e.getX(), e.getY());
467 newEN = snapHelper.isSnapOn() ? snapHelper.getSnapPoint(mouseEN) : mouseEN;
468 n = new Node(newEN); //create node at clicked point
469 newNode = true;
470 }
471 snapHelper.unsetFixedMode();
472 }
473
474 Collection<Command> cmds = new LinkedList<>();
475 Collection<OsmPrimitive> newSelection = new LinkedList<>(ds.getSelected());
476 List<Way> reuseWays = new ArrayList<>();
477 List<Way> replacedWays = new ArrayList<>();
478
479 if (newNode) {
480 if (n.getCoor().isOutSideWorld()) {
481 JOptionPane.showMessageDialog(
482 Main.parent,
483 tr("Cannot add a node outside of the world."),
484 tr("Warning"),
485 JOptionPane.WARNING_MESSAGE
486 );
487 return;
488 }
489 cmds.add(new AddCommand(n));
490
491 if (!ctrl) {
492 // Insert the node into all the nearby way segments
493 List<WaySegment> wss = mapView.getNearestWaySegments(
494 mapView.getPoint(n), OsmPrimitive::isSelectable);
495 if (snapHelper.isActive()) {
496 tryToMoveNodeOnIntersection(wss, n);
497 }
498 insertNodeIntoAllNearbySegments(wss, n, newSelection, cmds, replacedWays, reuseWays);
499 }
500 }
501 // now "n" is newly created or reused node that shoud be added to some way
502
503 // This part decides whether or not a "segment" (i.e. a connection) is made to an existing node.
504
505 // For a connection to be made, the user must either have a node selected (connection
506 // is made to that node), or he must have a way selected *and* one of the endpoints
507 // of that way must be the last used node (connection is made to last used node), or
508 // he must have a way and a node selected (connection is made to the selected node).
509
510 // If the above does not apply, the selection is cleared and a new try is started
511
512 boolean extendedWay = false;
513 boolean wayIsFinishedTemp = wayIsFinished;
514 wayIsFinished = false;
515
516 // don't draw lines if shift is held
517 if (!selection.isEmpty() && !shift) {
518 Node selectedNode = null;
519 Way selectedWay = null;
520
521 for (OsmPrimitive p : selection) {
522 if (p instanceof Node) {
523 if (selectedNode != null) {
524 // Too many nodes selected to do something useful
525 tryAgain(e);
526 return;
527 }
528 selectedNode = (Node) p;
529 } else if (p instanceof Way) {
530 if (selectedWay != null) {
531 // Too many ways selected to do something useful
532 tryAgain(e);
533 return;
534 }
535 selectedWay = (Way) p;
536 }
537 }
538
539 // the node from which we make a connection
540 Node n0 = findNodeToContinueFrom(selectedNode, selectedWay);
541 // We have a selection but it isn't suitable. Try again.
542 if (n0 == null) {
543 tryAgain(e);
544 return;
545 }
546 if (!wayIsFinishedTemp) {
547 if (isSelfContainedWay(selectedWay, n0, n))
548 return;
549
550 // User clicked last node again, finish way
551 if (n0 == n) {
552 finishDrawing();
553 return;
554 }
555
556 // Ok we know now that we'll insert a line segment, but will it connect to an
557 // existing way or make a new way of its own? The "alt" modifier means that the
558 // user wants a new way.
559 Way way = alt ? null : (selectedWay != null ? selectedWay : getWayForNode(n0));
560 Way wayToSelect;
561
562 // Don't allow creation of self-overlapping ways
563 if (way != null) {
564 int nodeCount = 0;
565 for (Node p : way.getNodes()) {
566 if (p.equals(n0)) {
567 nodeCount++;
568 }
569 }
570 if (nodeCount > 1) {
571 way = null;
572 }
573 }
574
575 if (way == null) {
576 way = new Way();
577 way.addNode(n0);
578 cmds.add(new AddCommand(way));
579 wayToSelect = way;
580 } else {
581 int i;
582 if ((i = replacedWays.indexOf(way)) != -1) {
583 way = reuseWays.get(i);
584 wayToSelect = way;
585 } else {
586 wayToSelect = way;
587 Way wnew = new Way(way);
588 cmds.add(new ChangeCommand(way, wnew));
589 way = wnew;
590 }
591 }
592
593 // Connected to a node that's already in the way
594 if (way.containsNode(n)) {
595 wayIsFinished = true;
596 selection.clear();
597 }
598
599 // Add new node to way
600 if (way.getNode(way.getNodesCount() - 1) == n0) {
601 way.addNode(n);
602 } else {
603 way.addNode(0, n);
604 }
605
606 extendedWay = true;
607 newSelection.clear();
608 newSelection.add(wayToSelect);
609 }
610 }
611 if (!extendedWay && !newNode) {
612 return; // We didn't do anything.
613 }
614
615 String title = getTitle(newNode, n, newSelection, reuseWays, extendedWay);
616
617 Command c = new SequenceCommand(title, cmds);
618
619 Main.main.undoRedo.add(c);
620 if (!wayIsFinished) {
621 lastUsedNode = n;
622 }
623
624 ds.setSelected(newSelection);
625
626 // "viewport following" mode for tracing long features
627 // from aerial imagery or GPS tracks.
628 if (VIEWPORT_FOLLOWING.get()) {
629 mapView.smoothScrollTo(n.getEastNorth());
630 }
631 computeHelperLine();
632 removeHighlighting();
633 }
634
635 private static String getTitle(boolean newNode, Node n, Collection<OsmPrimitive> newSelection, List<Way> reuseWays,
636 boolean extendedWay) {
637 String title;
638 if (!extendedWay) {
639 if (reuseWays.isEmpty()) {
640 title = tr("Add node");
641 } else {
642 title = tr("Add node into way");
643 for (Way w : reuseWays) {
644 newSelection.remove(w);
645 }
646 }
647 newSelection.clear();
648 newSelection.add(n);
649 } else if (!newNode) {
650 title = tr("Connect existing way to node");
651 } else if (reuseWays.isEmpty()) {
652 title = tr("Add a new node to an existing way");
653 } else {
654 title = tr("Add node into way and connect");
655 }
656 return title;
657 }
658
659 private void insertNodeIntoAllNearbySegments(List<WaySegment> wss, Node n, Collection<OsmPrimitive> newSelection,
660 Collection<Command> cmds, List<Way> replacedWays, List<Way> reuseWays) {
661 Map<Way, List<Integer>> insertPoints = new HashMap<>();
662 for (WaySegment ws : wss) {
663 List<Integer> is;
664 if (insertPoints.containsKey(ws.way)) {
665 is = insertPoints.get(ws.way);
666 } else {
667 is = new ArrayList<>();
668 insertPoints.put(ws.way, is);
669 }
670
671 is.add(ws.lowerIndex);
672 }
673
674 Set<Pair<Node, Node>> segSet = new HashSet<>();
675
676 for (Map.Entry<Way, List<Integer>> insertPoint : insertPoints.entrySet()) {
677 Way w = insertPoint.getKey();
678 List<Integer> is = insertPoint.getValue();
679
680 Way wnew = new Way(w);
681
682 pruneSuccsAndReverse(is);
683 for (int i : is) {
684 segSet.add(Pair.sort(new Pair<>(w.getNode(i), w.getNode(i+1))));
685 wnew.addNode(i + 1, n);
686 }
687
688 // If ALT is pressed, a new way should be created and that new way should get
689 // selected. This works everytime unless the ways the nodes get inserted into
690 // are already selected. This is the case when creating a self-overlapping way
691 // but pressing ALT prevents this. Therefore we must de-select the way manually
692 // here so /only/ the new way will be selected after this method finishes.
693 if (alt) {
694 newSelection.add(insertPoint.getKey());
695 }
696
697 cmds.add(new ChangeCommand(insertPoint.getKey(), wnew));
698 replacedWays.add(insertPoint.getKey());
699 reuseWays.add(wnew);
700 }
701
702 adjustNode(segSet, n);
703 }
704
705 /**
706 * Prevent creation of ways that look like this: &lt;----&gt;
707 * This happens if users want to draw a no-exit-sideway from the main way like this:
708 * ^
709 * |&lt;----&gt;
710 * |
711 * The solution isn't ideal because the main way will end in the side way, which is bad for
712 * navigation software ("drive straight on") but at least easier to fix. Maybe users will fix
713 * it on their own, too. At least it's better than producing an error.
714 *
715 * @param selectedWay the way to check
716 * @param currentNode the current node (i.e. the one the connection will be made from)
717 * @param targetNode the target node (i.e. the one the connection will be made to)
718 * @return {@code true} if this would create a selfcontaining way, {@code false} otherwise.
719 */
720 private boolean isSelfContainedWay(Way selectedWay, Node currentNode, Node targetNode) {
721 if (selectedWay != null) {
722 int posn0 = selectedWay.getNodes().indexOf(currentNode);
723 // CHECKSTYLE.OFF: SingleSpaceSeparator
724 if ((posn0 != -1 && // n0 is part of way
725 (posn0 >= 1 && targetNode.equals(selectedWay.getNode(posn0-1)))) || // previous node
726 (posn0 < selectedWay.getNodesCount()-1 && targetNode.equals(selectedWay.getNode(posn0+1)))) { // next node
727 getLayerManager().getEditDataSet().setSelected(targetNode);
728 lastUsedNode = targetNode;
729 return true;
730 }
731 // CHECKSTYLE.ON: SingleSpaceSeparator
732 }
733
734 return false;
735 }
736
737 /**
738 * Finds a node to continue drawing from. Decision is based upon given node and way.
739 * @param selectedNode Currently selected node, may be null
740 * @param selectedWay Currently selected way, may be null
741 * @return Node if a suitable node is found, null otherwise
742 */
743 private Node findNodeToContinueFrom(Node selectedNode, Way selectedWay) {
744 // No nodes or ways have been selected, this occurs when a relation
745 // has been selected or the selection is empty
746 if (selectedNode == null && selectedWay == null)
747 return null;
748
749 if (selectedNode == null) {
750 if (selectedWay.isFirstLastNode(lastUsedNode))
751 return lastUsedNode;
752
753 // We have a way selected, but no suitable node to continue from. Start anew.
754 return null;
755 }
756
757 if (selectedWay == null)
758 return selectedNode;
759
760 if (selectedWay.isFirstLastNode(selectedNode))
761 return selectedNode;
762
763 // We have a way and node selected, but it's not at the start/end of the way. Start anew.
764 return null;
765 }
766
767 @Override
768 public void mouseDragged(MouseEvent e) {
769 mouseMoved(e);
770 }
771
772 @Override
773 public void mouseMoved(MouseEvent e) {
774 if (!MainApplication.getMap().mapView.isActiveLayerDrawable())
775 return;
776
777 // we copy ctrl/alt/shift from the event just in case our global
778 // keyDetector didn't make it through the security manager. Unclear
779 // if that can ever happen but better be safe.
780 updateKeyModifiers(e);
781 mousePos = e.getPoint();
782 if (snapHelper.isSnapOn() && ctrl)
783 tryToSetBaseSegmentForAngleSnap();
784
785 computeHelperLine();
786 addHighlighting();
787 }
788
789 /**
790 * This method is used to detect segment under mouse and use it as reference for angle snapping
791 */
792 private void tryToSetBaseSegmentForAngleSnap() {
793 if (mousePos != null) {
794 WaySegment seg = MainApplication.getMap().mapView.getNearestWaySegment(mousePos, OsmPrimitive::isSelectable);
795 if (seg != null) {
796 snapHelper.setBaseSegment(seg);
797 }
798 }
799 }
800
801 /**
802 * This method prepares data required for painting the "helper line" from
803 * the last used position to the mouse cursor. It duplicates some code from
804 * mouseReleased() (FIXME).
805 */
806 private void computeHelperLine() {
807 if (mousePos == null) {
808 // Don't draw the line.
809 currentMouseEastNorth = null;
810 currentBaseNode = null;
811 return;
812 }
813
814 Collection<OsmPrimitive> selection = getLayerManager().getEditDataSet().getSelected();
815
816 MapView mv = MainApplication.getMap().mapView;
817 Node currentMouseNode = null;
818 mouseOnExistingNode = null;
819 mouseOnExistingWays = new HashSet<>();
820
821 showStatusInfo(-1, -1, -1, snapHelper.isSnapOn());
822
823 if (!ctrl && mousePos != null) {
824 currentMouseNode = mv.getNearestNode(mousePos, OsmPrimitive::isSelectable);
825 }
826
827 // We need this for highlighting and we'll only do so if we actually want to re-use
828 // *and* there is no node nearby (because nodes beat ways when re-using)
829 if (!ctrl && currentMouseNode == null) {
830 List<WaySegment> wss = mv.getNearestWaySegments(mousePos, OsmPrimitive::isSelectable);
831 for (WaySegment ws : wss) {
832 mouseOnExistingWays.add(ws.way);
833 }
834 }
835
836 if (currentMouseNode != null) {
837 // user clicked on node
838 if (selection.isEmpty()) return;
839 currentMouseEastNorth = currentMouseNode.getEastNorth();
840 mouseOnExistingNode = currentMouseNode;
841 } else {
842 // no node found in clicked area
843 currentMouseEastNorth = mv.getEastNorth(mousePos.x, mousePos.y);
844 }
845
846 determineCurrentBaseNodeAndPreviousNode(selection);
847 if (previousNode == null) {
848 snapHelper.noSnapNow();
849 }
850
851 if (getCurrentBaseNode() == null || getCurrentBaseNode() == currentMouseNode)
852 return; // Don't create zero length way segments.
853
854
855 double curHdg = Utils.toDegrees(getCurrentBaseNode().getEastNorth()
856 .heading(currentMouseEastNorth));
857 double baseHdg = -1;
858 if (previousNode != null) {
859 EastNorth en = previousNode.getEastNorth();
860 if (en != null) {
861 baseHdg = Utils.toDegrees(en.heading(getCurrentBaseNode().getEastNorth()));
862 }
863 }
864
865 snapHelper.checkAngleSnapping(currentMouseEastNorth, baseHdg, curHdg);
866
867 // status bar was filled by snapHelper
868 }
869
870 static void showStatusInfo(double angle, double hdg, double distance, boolean activeFlag) {
871 MapFrame map = MainApplication.getMap();
872 map.statusLine.setAngle(angle);
873 map.statusLine.activateAnglePanel(activeFlag);
874 map.statusLine.setHeading(hdg);
875 map.statusLine.setDist(distance);
876 }
877
878 /**
879 * Helper function that sets fields currentBaseNode and previousNode
880 * @param selection
881 * uses also lastUsedNode field
882 */
883 private void determineCurrentBaseNodeAndPreviousNode(Collection<OsmPrimitive> selection) {
884 Node selectedNode = null;
885 Way selectedWay = null;
886 for (OsmPrimitive p : selection) {
887 if (p instanceof Node) {
888 if (selectedNode != null)
889 return;
890 selectedNode = (Node) p;
891 } else if (p instanceof Way) {
892 if (selectedWay != null)
893 return;
894 selectedWay = (Way) p;
895 }
896 }
897 // we are here, if not more than 1 way or node is selected,
898
899 // the node from which we make a connection
900 currentBaseNode = null;
901 previousNode = null;
902
903 // Try to find an open way to measure angle from it. The way is not to be continued!
904 // warning: may result in changes of currentBaseNode and previousNode
905 // please remove if bugs arise
906 if (selectedWay == null && selectedNode != null) {
907 for (OsmPrimitive p: selectedNode.getReferrers()) {
908 if (p.isUsable() && p instanceof Way && ((Way) p).isFirstLastNode(selectedNode)) {
909 if (selectedWay != null) { // two uncontinued ways, nothing to take as reference
910 selectedWay = null;
911 break;
912 } else {
913 // set us ~continue this way (measure angle from it)
914 selectedWay = (Way) p;
915 }
916 }
917 }
918 }
919
920 if (selectedNode == null) {
921 if (selectedWay == null)
922 return;
923 continueWayFromNode(selectedWay, lastUsedNode);
924 } else if (selectedWay == null) {
925 currentBaseNode = selectedNode;
926 } else if (!selectedWay.isDeleted()) { // fix #7118
927 continueWayFromNode(selectedWay, selectedNode);
928 }
929 }
930
931 /**
932 * if one of the ends of {@code way} is given {@code node},
933 * then set currentBaseNode = node and previousNode = adjacent node of way
934 * @param way way to continue
935 * @param node starting node
936 */
937 private void continueWayFromNode(Way way, Node node) {
938 int n = way.getNodesCount();
939 if (node == way.firstNode()) {
940 currentBaseNode = node;
941 if (n > 1) previousNode = way.getNode(1);
942 } else if (node == way.lastNode()) {
943 currentBaseNode = node;
944 if (n > 1) previousNode = way.getNode(n-2);
945 }
946 }
947
948 /**
949 * Repaint on mouse exit so that the helper line goes away.
950 */
951 @Override
952 public void mouseExited(MouseEvent e) {
953 OsmDataLayer editLayer = Main.getLayerManager().getEditLayer();
954 if (editLayer == null)
955 return;
956 mousePos = e.getPoint();
957 snapHelper.noSnapNow();
958 boolean repaintIssued = removeHighlighting();
959 // force repaint in case snapHelper needs one. If removeHighlighting
960 // caused one already, don't do it again.
961 if (!repaintIssued) {
962 editLayer.invalidate();
963 }
964 }
965
966 /**
967 * @param n node
968 * @return If the node is the end of exactly one way, return this.
969 * <code>null</code> otherwise.
970 */
971 public static Way getWayForNode(Node n) {
972 Way way = null;
973 for (Way w : Utils.filteredCollection(n.getReferrers(), Way.class)) {
974 if (!w.isUsable() || w.getNodesCount() < 1) {
975 continue;
976 }
977 Node firstNode = w.getNode(0);
978 Node lastNode = w.getNode(w.getNodesCount() - 1);
979 if ((firstNode == n || lastNode == n) && (firstNode != lastNode)) {
980 if (way != null)
981 return null;
982 way = w;
983 }
984 }
985 return way;
986 }
987
988 /**
989 * Replies the current base node, after having checked it is still usable (see #11105).
990 * @return the current base node (can be null). If not-null, it's guaranteed the node is usable
991 */
992 public Node getCurrentBaseNode() {
993 if (currentBaseNode != null && (currentBaseNode.getDataSet() == null || !currentBaseNode.isUsable())) {
994 currentBaseNode = null;
995 }
996 return currentBaseNode;
997 }
998
999 private static void pruneSuccsAndReverse(List<Integer> is) {
1000 Set<Integer> is2 = new HashSet<>();
1001 for (int i : is) {
1002 if (!is2.contains(i - 1) && !is2.contains(i + 1)) {
1003 is2.add(i);
1004 }
1005 }
1006 is.clear();
1007 is.addAll(is2);
1008 Collections.sort(is);
1009 Collections.reverse(is);
1010 }
1011
1012 /**
1013 * Adjusts the position of a node to lie on a segment (or a segment intersection).
1014 *
1015 * If one or more than two segments are passed, the node is adjusted
1016 * to lie on the first segment that is passed.
1017 *
1018 * If two segments are passed, the node is adjusted to be at their intersection.
1019 *
1020 * No action is taken if no segments are passed.
1021 *
1022 * @param segs the segments to use as a reference when adjusting
1023 * @param n the node to adjust
1024 */
1025 private static void adjustNode(Collection<Pair<Node, Node>> segs, Node n) {
1026 switch (segs.size()) {
1027 case 0:
1028 return;
1029 case 2:
1030 adjustNodeTwoSegments(segs, n);
1031 break;
1032 default:
1033 adjustNodeDefault(segs, n);
1034 }
1035 }
1036
1037 private static void adjustNodeTwoSegments(Collection<Pair<Node, Node>> segs, Node n) {
1038 // This computes the intersection between the two segments and adjusts the node position.
1039 Iterator<Pair<Node, Node>> i = segs.iterator();
1040 Pair<Node, Node> seg = i.next();
1041 EastNorth pA = seg.a.getEastNorth();
1042 EastNorth pB = seg.b.getEastNorth();
1043 seg = i.next();
1044 EastNorth pC = seg.a.getEastNorth();
1045 EastNorth pD = seg.b.getEastNorth();
1046
1047 double u = det(pB.east() - pA.east(), pB.north() - pA.north(), pC.east() - pD.east(), pC.north() - pD.north());
1048
1049 // Check for parallel segments and do nothing if they are
1050 // In practice this will probably only happen when a way has been duplicated
1051
1052 if (u == 0)
1053 return;
1054
1055 // q is a number between 0 and 1
1056 // It is the point in the segment where the intersection occurs
1057 // if the segment is scaled to length 1
1058
1059 double q = det(pB.north() - pC.north(), pB.east() - pC.east(), pD.north() - pC.north(), pD.east() - pC.east()) / u;
1060 EastNorth intersection = new EastNorth(
1061 pB.east() + q * (pA.east() - pB.east()),
1062 pB.north() + q * (pA.north() - pB.north()));
1063
1064
1065 // only adjust to intersection if within snapToIntersectionThreshold pixel of mouse click; otherwise
1066 // fall through to default action.
1067 // (for semi-parallel lines, intersection might be miles away!)
1068 MapFrame map = MainApplication.getMap();
1069 if (map.mapView.getPoint2D(n).distance(map.mapView.getPoint2D(intersection)) < SNAP_TO_INTERSECTION_THRESHOLD.get()) {
1070 n.setEastNorth(intersection);
1071 return;
1072 }
1073
1074 adjustNodeDefault(segs, n);
1075 }
1076
1077 private static void adjustNodeDefault(Collection<Pair<Node, Node>> segs, Node n) {
1078 EastNorth p = n.getEastNorth();
1079 Pair<Node, Node> seg = segs.iterator().next();
1080 EastNorth pA = seg.a.getEastNorth();
1081 EastNorth pB = seg.b.getEastNorth();
1082 double a = p.distanceSq(pB);
1083 double b = p.distanceSq(pA);
1084 double c = pA.distanceSq(pB);
1085 double q = (a - b + c) / (2*c);
1086 n.setEastNorth(new EastNorth(pB.east() + q * (pA.east() - pB.east()), pB.north() + q * (pA.north() - pB.north())));
1087 }
1088
1089 // helper for adjustNode
1090 static double det(double a, double b, double c, double d) {
1091 return a * d - b * c;
1092 }
1093
1094 private void tryToMoveNodeOnIntersection(List<WaySegment> wss, Node n) {
1095 if (wss.isEmpty())
1096 return;
1097 WaySegment ws = wss.get(0);
1098 EastNorth p1 = ws.getFirstNode().getEastNorth();
1099 EastNorth p2 = ws.getSecondNode().getEastNorth();
1100 if (snapHelper.dir2 != null && getCurrentBaseNode() != null) {
1101 EastNorth xPoint = Geometry.getSegmentSegmentIntersection(p1, p2, snapHelper.dir2,
1102 getCurrentBaseNode().getEastNorth());
1103 if (xPoint != null) {
1104 n.setEastNorth(xPoint);
1105 }
1106 }
1107 }
1108
1109 /**
1110 * Takes the data from computeHelperLine to determine which ways/nodes should be highlighted
1111 * (if feature enabled). Also sets the target cursor if appropriate. It adds the to-be-
1112 * highlighted primitives to newHighlights but does not actually highlight them. This work is
1113 * done in redrawIfRequired. This means, calling addHighlighting() without redrawIfRequired()
1114 * will leave the data in an inconsistent state.
1115 *
1116 * The status bar derives its information from oldHighlights, so in order to update the status
1117 * bar both addHighlighting() and repaintIfRequired() are needed, since former fills newHighlights
1118 * and latter processes them into oldHighlights.
1119 */
1120 private void addHighlighting() {
1121 newHighlights = new HashSet<>();
1122 MapView mapView = MainApplication.getMap().mapView;
1123
1124 // if ctrl key is held ("no join"), don't highlight anything
1125 if (ctrl) {
1126 mapView.setNewCursor(cursor, this);
1127 redrawIfRequired();
1128 return;
1129 }
1130
1131 // This happens when nothing is selected, but we still want to highlight the "target node"
1132 if (mouseOnExistingNode == null && mousePos != null && getLayerManager().getEditDataSet().selectionEmpty()) {
1133 mouseOnExistingNode = mapView.getNearestNode(mousePos, OsmPrimitive::isSelectable);
1134 }
1135
1136 if (mouseOnExistingNode != null) {
1137 mapView.setNewCursor(cursorJoinNode, this);
1138 newHighlights.add(mouseOnExistingNode);
1139 redrawIfRequired();
1140 return;
1141 }
1142
1143 // Insert the node into all the nearby way segments
1144 if (mouseOnExistingWays.isEmpty()) {
1145 mapView.setNewCursor(cursor, this);
1146 redrawIfRequired();
1147 return;
1148 }
1149
1150 mapView.setNewCursor(cursorJoinWay, this);
1151 newHighlights.addAll(mouseOnExistingWays);
1152 redrawIfRequired();
1153 }
1154
1155 /**
1156 * Removes target highlighting from primitives. Issues repaint if required.
1157 * @return true if a repaint has been issued.
1158 */
1159 private boolean removeHighlighting() {
1160 newHighlights = new HashSet<>();
1161 return redrawIfRequired();
1162 }
1163
1164 @Override
1165 public void paint(Graphics2D g, MapView mv, Bounds box) {
1166 // sanity checks
1167 MapView mapView = MainApplication.getMap().mapView;
1168 if (mapView == null || mousePos == null
1169 // don't draw line if we don't know where from or where to
1170 || currentMouseEastNorth == null || getCurrentBaseNode() == null
1171 // don't draw line if mouse is outside window
1172 || !mapView.getState().getForView(mousePos.getX(), mousePos.getY()).isInView())
1173 return;
1174
1175 Graphics2D g2 = g;
1176 snapHelper.drawIfNeeded(g2, mv.getState());
1177 if (!DRAW_HELPER_LINE.get() || wayIsFinished || shift)
1178 return;
1179
1180 if (!snapHelper.isActive()) {
1181 g2.setColor(RUBBER_LINE_COLOR.get());
1182 g2.setStroke(RUBBER_LINE_STROKE.get());
1183 paintConstructionGeometry(mv, g2);
1184 } else if (DRAW_CONSTRUCTION_GEOMETRY.get()) {
1185 // else use color and stoke from snapHelper.draw
1186 paintConstructionGeometry(mv, g2);
1187 }
1188 }
1189
1190 private void paintConstructionGeometry(MapView mv, Graphics2D g2) {
1191 MapPath2D b = new MapPath2D();
1192 MapViewPoint p1 = mv.getState().getPointFor(getCurrentBaseNode());
1193 MapViewPoint p2 = mv.getState().getPointFor(currentMouseEastNorth);
1194
1195 b.moveTo(p1);
1196 b.lineTo(p2);
1197
1198 // if alt key is held ("start new way"), draw a little perpendicular line
1199 if (alt) {
1200 START_WAY_INDICATOR.paintArrowAt(b, p1, p2);
1201 }
1202
1203 g2.draw(b);
1204 g2.setStroke(BASIC_STROKE);
1205 }
1206
1207 @Override
1208 public String getModeHelpText() {
1209 StringBuilder rv;
1210 /*
1211 * No modifiers: all (Connect, Node Re-Use, Auto-Weld)
1212 * CTRL: disables node re-use, auto-weld
1213 * Shift: do not make connection
1214 * ALT: make connection but start new way in doing so
1215 */
1216
1217 /*
1218 * Status line text generation is split into two parts to keep it maintainable.
1219 * First part looks at what will happen to the new node inserted on click and
1220 * the second part will look if a connection is made or not.
1221 *
1222 * Note that this help text is not absolutely accurate as it doesn't catch any special
1223 * cases (e.g. when preventing <---> ways). The only special that it catches is when
1224 * a way is about to be finished.
1225 *
1226 * First check what happens to the new node.
1227 */
1228
1229 // oldHighlights stores the current highlights. If this
1230 // list is empty we can assume that we won't do any joins
1231 if (ctrl || oldHighlights.isEmpty()) {
1232 rv = new StringBuilder(tr("Create new node."));
1233 } else {
1234 // oldHighlights may store a node or way, check if it's a node
1235 OsmPrimitive x = oldHighlights.iterator().next();
1236 if (x instanceof Node) {
1237 rv = new StringBuilder(tr("Select node under cursor."));
1238 } else {
1239 rv = new StringBuilder(trn("Insert new node into way.", "Insert new node into {0} ways.",
1240 oldHighlights.size(), oldHighlights.size()));
1241 }
1242 }
1243
1244 /*
1245 * Check whether a connection will be made
1246 */
1247 if (!wayIsFinished && getCurrentBaseNode() != null) {
1248 if (alt) {
1249 rv.append(' ').append(tr("Start new way from last node."));
1250 } else {
1251 rv.append(' ').append(tr("Continue way from last node."));
1252 }
1253 if (snapHelper.isSnapOn()) {
1254 rv.append(' ').append(tr("Angle snapping active."));
1255 }
1256 }
1257
1258 Node n = mouseOnExistingNode;
1259 DataSet ds = getLayerManager().getEditDataSet();
1260 /*
1261 * Handle special case: Highlighted node == selected node => finish drawing
1262 */
1263 if (n != null && ds != null && ds.getSelectedNodes().contains(n)) {
1264 if (wayIsFinished) {
1265 rv = new StringBuilder(tr("Select node under cursor."));
1266 } else {
1267 rv = new StringBuilder(tr("Finish drawing."));
1268 }
1269 }
1270
1271 /*
1272 * Handle special case: Self-Overlapping or closing way
1273 */
1274 if (ds != null && !ds.getSelectedWays().isEmpty() && !wayIsFinished && !alt) {
1275 Way w = ds.getSelectedWays().iterator().next();
1276 for (Node m : w.getNodes()) {
1277 if (m.equals(mouseOnExistingNode) || mouseOnExistingWays.contains(w)) {
1278 rv.append(' ').append(tr("Finish drawing."));
1279 break;
1280 }
1281 }
1282 }
1283 return rv.toString();
1284 }
1285
1286 /**
1287 * Get selected primitives, while draw action is in progress.
1288 *
1289 * While drawing a way, technically the last node is selected.
1290 * This is inconvenient when the user tries to add/edit tags to the way.
1291 * For this case, this method returns the current way as selection,
1292 * to work around this issue.
1293 * Otherwise the normal selection of the current data layer is returned.
1294 * @return selected primitives, while draw action is in progress
1295 */
1296 public Collection<OsmPrimitive> getInProgressSelection() {
1297 DataSet ds = getLayerManager().getEditDataSet();
1298 if (ds == null) return null;
1299 if (getCurrentBaseNode() != null && !ds.selectionEmpty()) {
1300 Way continueFrom = getWayForNode(getCurrentBaseNode());
1301 if (continueFrom != null)
1302 return Collections.<OsmPrimitive>singleton(continueFrom);
1303 }
1304 return ds.getSelected();
1305 }
1306
1307 @Override
1308 public Collection<? extends OsmPrimitive> getPreservedPrimitives() {
1309 DataSet ds = getLayerManager().getEditDataSet();
1310 return ds != null ? ds.getSelected() : Collections.emptySet();
1311 }
1312
1313 @Override
1314 public boolean layerIsSupported(Layer l) {
1315 return l instanceof OsmDataLayer;
1316 }
1317
1318 @Override
1319 protected void updateEnabledState() {
1320 setEnabled(getLayerManager().getEditLayer() != null);
1321 }
1322
1323 @Override
1324 public void destroy() {
1325 super.destroy();
1326 snapChangeAction.destroy();
1327 }
1328
1329 /**
1330 * Undo the last command. Binded by default to backspace key.
1331 */
1332 public class BackSpaceAction extends AbstractAction {
1333
1334 @Override
1335 public void actionPerformed(ActionEvent e) {
1336 Main.main.undoRedo.undo();
1337 Command lastCmd = Main.main.undoRedo.getLastCommand();
1338 if (lastCmd == null) return;
1339 Node n = null;
1340 for (OsmPrimitive p: lastCmd.getParticipatingPrimitives()) {
1341 if (p instanceof Node) {
1342 if (n == null) {
1343 n = (Node) p; // found one node
1344 wayIsFinished = false;
1345 } else {
1346 // if more than 1 node were affected by previous command,
1347 // we have no way to continue, so we forget about found node
1348 n = null;
1349 break;
1350 }
1351 }
1352 }
1353 // select last added node - maybe we will continue drawing from it
1354 if (n != null) {
1355 getLayerManager().getEditDataSet().addSelected(n);
1356 }
1357 }
1358 }
1359
1360 private class SnapChangeAction extends JosmAction {
1361 /**
1362 * Constructs a new {@code SnapChangeAction}.
1363 */
1364 SnapChangeAction() {
1365 super(tr("Angle snapping"), /* ICON() */ "anglesnap",
1366 tr("Switch angle snapping mode while drawing"), null, false);
1367 putValue("help", ht("/Action/Draw/AngleSnap"));
1368 }
1369
1370 @Override
1371 public void actionPerformed(ActionEvent e) {
1372 if (snapHelper != null) {
1373 snapHelper.toggleSnapping();
1374 }
1375 }
1376
1377 @Override
1378 protected void updateEnabledState() {
1379 MapFrame map = MainApplication.getMap();
1380 setEnabled(map != null && map.mapMode instanceof DrawAction);
1381 }
1382 }
1383}
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