source: josm/trunk/src/org/openstreetmap/josm/actions/mapmode/DrawAction.java@ 11713

Last change on this file since 11713 was 11713, checked in by Don-vip, 7 years ago

add Ant target to run PMD (only few rules for now), fix violations
  • Property svn:eol-style set to native
File size: 52.1 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.SelectionChangedListener;
41import org.openstreetmap.josm.data.coor.EastNorth;
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.visitor.paint.ArrowPaintHelper;
48import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
49import org.openstreetmap.josm.data.preferences.AbstractToStringProperty;
50import org.openstreetmap.josm.data.preferences.BooleanProperty;
51import org.openstreetmap.josm.data.preferences.CachingProperty;
52import org.openstreetmap.josm.data.preferences.ColorProperty;
53import org.openstreetmap.josm.data.preferences.DoubleProperty;
54import org.openstreetmap.josm.data.preferences.StrokeProperty;
55import org.openstreetmap.josm.gui.MainMenu;
56import org.openstreetmap.josm.gui.MapView;
57import org.openstreetmap.josm.gui.MapViewState.MapViewPoint;
58import org.openstreetmap.josm.gui.NavigatableComponent;
59import org.openstreetmap.josm.gui.draw.MapPath2D;
60import org.openstreetmap.josm.gui.layer.Layer;
61import org.openstreetmap.josm.gui.layer.MapViewPaintable;
62import org.openstreetmap.josm.gui.layer.OsmDataLayer;
63import org.openstreetmap.josm.gui.util.KeyPressReleaseListener;
64import org.openstreetmap.josm.gui.util.ModifierListener;
65import org.openstreetmap.josm.tools.Geometry;
66import org.openstreetmap.josm.tools.ImageProvider;
67import org.openstreetmap.josm.tools.Pair;
68import org.openstreetmap.josm.tools.Shortcut;
69import org.openstreetmap.josm.tools.Utils;
70
71/**
72 * Mapmode to add nodes, create and extend ways.
73 */
74public class DrawAction extends MapMode implements MapViewPaintable, SelectionChangedListener, KeyPressReleaseListener, ModifierListener {
75
76 private static final Color ORANGE_TRANSPARENT = new Color(Color.ORANGE.getRed(), Color.ORANGE.getGreen(), Color.ORANGE.getBlue(), 128);
77
78 private static final ArrowPaintHelper START_WAY_INDICATOR = new ArrowPaintHelper(Math.toRadians(90), 8);
79
80 static final CachingProperty<Boolean> USE_REPEATED_SHORTCUT
81 = new BooleanProperty("draw.anglesnap.toggleOnRepeatedA", true).cached();
82 static final CachingProperty<BasicStroke> RUBBER_LINE_STROKE
83 = new StrokeProperty("draw.stroke.helper-line", "3").cached();
84
85 static final CachingProperty<BasicStroke> HIGHLIGHT_STROKE
86 = new StrokeProperty("draw.anglesnap.stroke.highlight", "10").cached();
87 static final CachingProperty<BasicStroke> HELPER_STROKE
88 = new StrokeProperty("draw.anglesnap.stroke.helper", "1 4").cached();
89
90 static final CachingProperty<Double> SNAP_ANGLE_TOLERANCE
91 = new DoubleProperty("draw.anglesnap.tolerance", 5.0).cached();
92 static final CachingProperty<Boolean> DRAW_CONSTRUCTION_GEOMETRY
93 = new BooleanProperty("draw.anglesnap.drawConstructionGeometry", true).cached();
94 static final CachingProperty<Boolean> SHOW_PROJECTED_POINT
95 = new BooleanProperty("draw.anglesnap.drawProjectedPoint", true).cached();
96 static final CachingProperty<Boolean> SNAP_TO_PROJECTIONS
97 = new BooleanProperty("draw.anglesnap.projectionsnap", true).cached();
98
99 static final CachingProperty<Boolean> SHOW_ANGLE
100 = new BooleanProperty("draw.anglesnap.showAngle", true).cached();
101
102 static final CachingProperty<Color> SNAP_HELPER_COLOR
103 = new ColorProperty(marktr("draw angle snap"), Color.ORANGE).cached();
104
105 static final CachingProperty<Color> HIGHLIGHT_COLOR
106 = new ColorProperty(marktr("draw angle snap highlight"), ORANGE_TRANSPARENT).cached();
107
108 static final AbstractToStringProperty<Color> RUBBER_LINE_COLOR
109 = PaintColors.SELECTED.getProperty().getChildColor(marktr("helper line"));
110
111 static final CachingProperty<Boolean> DRAW_HELPER_LINE
112 = new BooleanProperty("draw.helper-line", true).cached();
113 static final CachingProperty<Boolean> DRAW_TARGET_HIGHLIGHT
114 = new BooleanProperty("draw.target-highlight", true).cached();
115 static final CachingProperty<Double> SNAP_TO_INTERSECTION_THRESHOLD
116 = new DoubleProperty("edit.snap-intersection-threshold", 10).cached();
117
118 private final Cursor cursorJoinNode;
119 private final Cursor cursorJoinWay;
120
121 private transient Node lastUsedNode;
122 private double toleranceMultiplier;
123
124 private transient Node mouseOnExistingNode;
125 private transient Set<Way> mouseOnExistingWays = new HashSet<>();
126 // old highlights store which primitives are currently highlighted. This
127 // is true, even if target highlighting is disabled since the status bar
128 // derives its information from this list as well.
129 private transient Set<OsmPrimitive> oldHighlights = new HashSet<>();
130 // new highlights contains a list of primitives that should be highlighted
131 // but haven't been so far. The idea is to compare old and new and only
132 // repaint if there are changes.
133 private transient Set<OsmPrimitive> newHighlights = new HashSet<>();
134 private boolean wayIsFinished;
135 private Point mousePos;
136 private Point oldMousePos;
137
138 private transient Node currentBaseNode;
139 private transient Node previousNode;
140 private EastNorth currentMouseEastNorth;
141
142 private final transient DrawSnapHelper snapHelper = new DrawSnapHelper(this);
143
144 private final transient Shortcut backspaceShortcut;
145 private final BackSpaceAction backspaceAction;
146 private final transient Shortcut snappingShortcut;
147 private boolean ignoreNextKeyRelease;
148
149 private final SnapChangeAction snapChangeAction;
150 private final JCheckBoxMenuItem snapCheckboxMenuItem;
151 private static final BasicStroke BASIC_STROKE = new BasicStroke(1);
152
153 private Point rightClickPressPos;
154
155 /**
156 * Constructs a new {@code DrawAction}.
157 * @since 11713
158 */
159 public DrawAction() {
160 super(tr("Draw"), "node/autonode", tr("Draw nodes"),
161 Shortcut.registerShortcut("mapmode:draw", tr("Mode: {0}", tr("Draw")), KeyEvent.VK_A, Shortcut.DIRECT),
162 ImageProvider.getCursor("crosshair", null));
163
164 snappingShortcut = Shortcut.registerShortcut("mapmode:drawanglesnapping",
165 tr("Mode: Draw Angle snapping"), KeyEvent.CHAR_UNDEFINED, Shortcut.NONE);
166 snapChangeAction = new SnapChangeAction();
167 snapCheckboxMenuItem = addMenuItem();
168 snapHelper.setMenuCheckBox(snapCheckboxMenuItem);
169 backspaceShortcut = Shortcut.registerShortcut("mapmode:backspace",
170 tr("Backspace in Add mode"), KeyEvent.VK_BACK_SPACE, Shortcut.DIRECT);
171 backspaceAction = new BackSpaceAction();
172 cursorJoinNode = ImageProvider.getCursor("crosshair", "joinnode");
173 cursorJoinWay = ImageProvider.getCursor("crosshair", "joinway");
174
175 snapHelper.init();
176 }
177
178 private JCheckBoxMenuItem addMenuItem() {
179 int n = Main.main.menu.editMenu.getItemCount();
180 for (int i = n-1; i > 0; i--) {
181 JMenuItem item = Main.main.menu.editMenu.getItem(i);
182 if (item != null && item.getAction() != null && item.getAction() instanceof SnapChangeAction) {
183 Main.main.menu.editMenu.remove(i);
184 }
185 }
186 return MainMenu.addWithCheckbox(Main.main.menu.editMenu, snapChangeAction, MainMenu.WINDOW_MENU_GROUP.VOLATILE);
187 }
188
189 /**
190 * Checks if a map redraw is required and does so if needed. Also updates the status bar.
191 * @return true if a repaint is needed
192 */
193 private boolean redrawIfRequired() {
194 updateStatusLine();
195 // repaint required if the helper line is active.
196 boolean needsRepaint = DRAW_HELPER_LINE.get() && !wayIsFinished;
197 if (DRAW_TARGET_HIGHLIGHT.get()) {
198 // move newHighlights to oldHighlights; only update changed primitives
199 for (OsmPrimitive x : newHighlights) {
200 if (oldHighlights.contains(x)) {
201 continue;
202 }
203 x.setHighlighted(true);
204 needsRepaint = true;
205 }
206 oldHighlights.removeAll(newHighlights);
207 for (OsmPrimitive x : oldHighlights) {
208 x.setHighlighted(false);
209 needsRepaint = true;
210 }
211 }
212 // required in order to print correct help text
213 oldHighlights = newHighlights;
214
215 if (!needsRepaint && !DRAW_TARGET_HIGHLIGHT.get())
216 return false;
217
218 // update selection to reflect which way being modified
219 OsmDataLayer editLayer = getLayerManager().getEditLayer();
220 if (editLayer != null && getCurrentBaseNode() != null && !editLayer.data.selectionEmpty()) {
221 DataSet currentDataSet = editLayer.data;
222 Way continueFrom = getWayForNode(getCurrentBaseNode());
223 if (alt && continueFrom != null && (!getCurrentBaseNode().isSelected() || continueFrom.isSelected())) {
224 addRemoveSelection(currentDataSet, getCurrentBaseNode(), continueFrom);
225 needsRepaint = true;
226 } else if (!alt && continueFrom != null && !continueFrom.isSelected()) {
227 currentDataSet.addSelected(continueFrom);
228 needsRepaint = true;
229 }
230 }
231
232 if (needsRepaint && editLayer != null) {
233 editLayer.invalidate();
234 }
235 return needsRepaint;
236 }
237
238 private static void addRemoveSelection(DataSet ds, OsmPrimitive toAdd, OsmPrimitive toRemove) {
239 ds.beginUpdate(); // to prevent the selection listener to screw around with the state
240 ds.addSelected(toAdd);
241 ds.clearSelection(toRemove);
242 ds.endUpdate();
243 }
244
245 @Override
246 public void enterMode() {
247 if (!isEnabled())
248 return;
249 super.enterMode();
250 readPreferences();
251
252 // determine if selection is suitable to continue drawing. If it
253 // isn't, set wayIsFinished to true to avoid superfluous repaints.
254 determineCurrentBaseNodeAndPreviousNode(getLayerManager().getEditDataSet().getSelected());
255 wayIsFinished = getCurrentBaseNode() == null;
256
257 toleranceMultiplier = 0.01 * NavigatableComponent.PROP_SNAP_DISTANCE.get();
258
259 snapHelper.init();
260 snapCheckboxMenuItem.getAction().setEnabled(true);
261
262 Main.map.statusLine.getAnglePanel().addMouseListener(snapHelper.anglePopupListener);
263 Main.registerActionShortcut(backspaceAction, backspaceShortcut);
264
265 Main.map.mapView.addMouseListener(this);
266 Main.map.mapView.addMouseMotionListener(this);
267 Main.map.mapView.addTemporaryLayer(this);
268 DataSet.addSelectionListener(this);
269
270 Main.map.keyDetector.addKeyListener(this);
271 Main.map.keyDetector.addModifierListener(this);
272 ignoreNextKeyRelease = true;
273 }
274
275 @Override
276 public void exitMode() {
277 super.exitMode();
278 Main.map.mapView.removeMouseListener(this);
279 Main.map.mapView.removeMouseMotionListener(this);
280 Main.map.mapView.removeTemporaryLayer(this);
281 DataSet.removeSelectionListener(this);
282 Main.unregisterActionShortcut(backspaceAction, backspaceShortcut);
283 snapHelper.unsetFixedMode();
284 snapCheckboxMenuItem.getAction().setEnabled(false);
285
286 Main.map.statusLine.getAnglePanel().removeMouseListener(snapHelper.anglePopupListener);
287 Main.map.statusLine.activateAnglePanel(false);
288
289 removeHighlighting();
290 Main.map.keyDetector.removeKeyListener(this);
291 Main.map.keyDetector.removeModifierListener(this);
292
293 // when exiting we let everybody know about the currently selected
294 // primitives
295 //
296 DataSet ds = getLayerManager().getEditDataSet();
297 if (ds != null) {
298 ds.fireSelectionChanged();
299 }
300 }
301
302 /**
303 * redraw to (possibly) get rid of helper line if selection changes.
304 */
305 @Override
306 public void modifiersChanged(int modifiers) {
307 if (!Main.isDisplayingMapView() || !Main.map.mapView.isActiveLayerDrawable())
308 return;
309 updateKeyModifiers(modifiers);
310 computeHelperLine();
311 addHighlighting();
312 }
313
314 @Override
315 public void doKeyPressed(KeyEvent e) {
316 if (!snappingShortcut.isEvent(e) && !(USE_REPEATED_SHORTCUT.get() && getShortcut().isEvent(e)))
317 return;
318 snapHelper.setFixedMode();
319 computeHelperLine();
320 redrawIfRequired();
321 }
322
323 @Override
324 public void doKeyReleased(KeyEvent e) {
325 if (!snappingShortcut.isEvent(e) && !(USE_REPEATED_SHORTCUT.get() && getShortcut().isEvent(e)))
326 return;
327 if (ignoreNextKeyRelease) {
328 ignoreNextKeyRelease = false;
329 return;
330 }
331 snapHelper.unFixOrTurnOff();
332 computeHelperLine();
333 redrawIfRequired();
334 }
335
336 /**
337 * redraw to (possibly) get rid of helper line if selection changes.
338 */
339 @Override
340 public void selectionChanged(Collection<? extends OsmPrimitive> newSelection) {
341 if (!Main.map.mapView.isActiveLayerDrawable())
342 return;
343 computeHelperLine();
344 addHighlighting();
345 }
346
347 private void tryAgain(MouseEvent e) {
348 getLayerManager().getEditDataSet().setSelected();
349 mouseReleased(e);
350 }
351
352 /**
353 * This function should be called when the user wishes to finish his current draw action.
354 * If Potlatch Style is enabled, it will switch to select tool, otherwise simply disable
355 * the helper line until the user chooses to draw something else.
356 */
357 private void finishDrawing() {
358 // let everybody else know about the current selection
359 //
360 Main.getLayerManager().getEditDataSet().fireSelectionChanged();
361 lastUsedNode = null;
362 wayIsFinished = true;
363 Main.map.selectSelectTool(true);
364 snapHelper.noSnapNow();
365
366 // Redraw to remove the helper line stub
367 computeHelperLine();
368 removeHighlighting();
369 }
370
371 @Override
372 public void mousePressed(MouseEvent e) {
373 if (e.getButton() == MouseEvent.BUTTON3) {
374 rightClickPressPos = e.getPoint();
375 }
376 }
377
378 /**
379 * If user clicked with the left button, add a node at the current mouse
380 * position.
381 *
382 * If in nodeway mode, insert the node into the way.
383 */
384 @Override
385 public void mouseReleased(MouseEvent e) {
386 if (e.getButton() == MouseEvent.BUTTON3) {
387 Point curMousePos = e.getPoint();
388 if (curMousePos.equals(rightClickPressPos)) {
389 tryToSetBaseSegmentForAngleSnap();
390 }
391 return;
392 }
393 if (e.getButton() != MouseEvent.BUTTON1)
394 return;
395 if (!Main.map.mapView.isActiveLayerDrawable())
396 return;
397 // request focus in order to enable the expected keyboard shortcuts
398 //
399 Main.map.mapView.requestFocus();
400
401 if (e.getClickCount() > 1 && mousePos != null && mousePos.equals(oldMousePos)) {
402 // A double click equals "user clicked last node again, finish way"
403 // Change draw tool only if mouse position is nearly the same, as
404 // otherwise fast clicks will count as a double click
405 finishDrawing();
406 return;
407 }
408 oldMousePos = mousePos;
409
410 // we copy ctrl/alt/shift from the event just in case our global
411 // keyDetector didn't make it through the security manager. Unclear
412 // if that can ever happen but better be safe.
413 updateKeyModifiers(e);
414 mousePos = e.getPoint();
415
416 DataSet ds = getLayerManager().getEditDataSet();
417 Collection<OsmPrimitive> selection = new ArrayList<>(ds.getSelected());
418
419 boolean newNode = false;
420 Node n = Main.map.mapView.getNearestNode(mousePos, OsmPrimitive::isSelectable);
421 if (ctrl) {
422 Iterator<Way> it = ds.getSelectedWays().iterator();
423 if (it.hasNext()) {
424 // ctrl-click on node of selected way = reuse node despite of ctrl
425 if (!it.next().containsNode(n)) n = null;
426 } else {
427 n = null; // ctrl-click + no selected way = new node
428 }
429 }
430
431 if (n != null && !snapHelper.isActive()) {
432 // user clicked on node
433 if (selection.isEmpty() || wayIsFinished) {
434 // select the clicked node and do nothing else
435 // (this is just a convenience option so that people don't
436 // have to switch modes)
437
438 ds.setSelected(n);
439 // If we extend/continue an existing way, select it already now to make it obvious
440 Way continueFrom = getWayForNode(n);
441 if (continueFrom != null) {
442 ds.addSelected(continueFrom);
443 }
444
445 // The user explicitly selected a node, so let him continue drawing
446 wayIsFinished = false;
447 return;
448 }
449 } else {
450 EastNorth newEN;
451 if (n != null) {
452 EastNorth foundPoint = n.getEastNorth();
453 // project found node to snapping line
454 newEN = snapHelper.getSnapPoint(foundPoint);
455 // do not add new node if there is some node within snapping distance
456 double tolerance = Main.map.mapView.getDist100Pixel() * toleranceMultiplier;
457 if (foundPoint.distance(newEN) > tolerance) {
458 n = new Node(newEN); // point != projected, so we create new node
459 newNode = true;
460 }
461 } else { // n==null, no node found in clicked area
462 EastNorth mouseEN = Main.map.mapView.getEastNorth(e.getX(), e.getY());
463 newEN = snapHelper.isSnapOn() ? snapHelper.getSnapPoint(mouseEN) : mouseEN;
464 n = new Node(newEN); //create node at clicked point
465 newNode = true;
466 }
467 snapHelper.unsetFixedMode();
468 }
469
470 Collection<Command> cmds = new LinkedList<>();
471 Collection<OsmPrimitive> newSelection = new LinkedList<>(ds.getSelected());
472 List<Way> reuseWays = new ArrayList<>();
473 List<Way> replacedWays = new ArrayList<>();
474
475 if (newNode) {
476 if (n.getCoor().isOutSideWorld()) {
477 JOptionPane.showMessageDialog(
478 Main.parent,
479 tr("Cannot add a node outside of the world."),
480 tr("Warning"),
481 JOptionPane.WARNING_MESSAGE
482 );
483 return;
484 }
485 cmds.add(new AddCommand(n));
486
487 if (!ctrl) {
488 // Insert the node into all the nearby way segments
489 List<WaySegment> wss = Main.map.mapView.getNearestWaySegments(
490 Main.map.mapView.getPoint(n), OsmPrimitive::isSelectable);
491 if (snapHelper.isActive()) {
492 tryToMoveNodeOnIntersection(wss, n);
493 }
494 insertNodeIntoAllNearbySegments(wss, n, newSelection, cmds, replacedWays, reuseWays);
495 }
496 }
497 // now "n" is newly created or reused node that shoud be added to some way
498
499 // This part decides whether or not a "segment" (i.e. a connection) is made to an existing node.
500
501 // For a connection to be made, the user must either have a node selected (connection
502 // is made to that node), or he must have a way selected *and* one of the endpoints
503 // of that way must be the last used node (connection is made to last used node), or
504 // he must have a way and a node selected (connection is made to the selected node).
505
506 // If the above does not apply, the selection is cleared and a new try is started
507
508 boolean extendedWay = false;
509 boolean wayIsFinishedTemp = wayIsFinished;
510 wayIsFinished = false;
511
512 // don't draw lines if shift is held
513 if (!selection.isEmpty() && !shift) {
514 Node selectedNode = null;
515 Way selectedWay = null;
516
517 for (OsmPrimitive p : selection) {
518 if (p instanceof Node) {
519 if (selectedNode != null) {
520 // Too many nodes selected to do something useful
521 tryAgain(e);
522 return;
523 }
524 selectedNode = (Node) p;
525 } else if (p instanceof Way) {
526 if (selectedWay != null) {
527 // Too many ways selected to do something useful
528 tryAgain(e);
529 return;
530 }
531 selectedWay = (Way) p;
532 }
533 }
534
535 // the node from which we make a connection
536 Node n0 = findNodeToContinueFrom(selectedNode, selectedWay);
537 // We have a selection but it isn't suitable. Try again.
538 if (n0 == null) {
539 tryAgain(e);
540 return;
541 }
542 if (!wayIsFinishedTemp) {
543 if (isSelfContainedWay(selectedWay, n0, n))
544 return;
545
546 // User clicked last node again, finish way
547 if (n0 == n) {
548 finishDrawing();
549 return;
550 }
551
552 // Ok we know now that we'll insert a line segment, but will it connect to an
553 // existing way or make a new way of its own? The "alt" modifier means that the
554 // user wants a new way.
555 Way way = alt ? null : (selectedWay != null ? selectedWay : getWayForNode(n0));
556 Way wayToSelect;
557
558 // Don't allow creation of self-overlapping ways
559 if (way != null) {
560 int nodeCount = 0;
561 for (Node p : way.getNodes()) {
562 if (p.equals(n0)) {
563 nodeCount++;
564 }
565 }
566 if (nodeCount > 1) {
567 way = null;
568 }
569 }
570
571 if (way == null) {
572 way = new Way();
573 way.addNode(n0);
574 cmds.add(new AddCommand(way));
575 wayToSelect = way;
576 } else {
577 int i;
578 if ((i = replacedWays.indexOf(way)) != -1) {
579 way = reuseWays.get(i);
580 wayToSelect = way;
581 } else {
582 wayToSelect = way;
583 Way wnew = new Way(way);
584 cmds.add(new ChangeCommand(way, wnew));
585 way = wnew;
586 }
587 }
588
589 // Connected to a node that's already in the way
590 if (way.containsNode(n)) {
591 wayIsFinished = true;
592 selection.clear();
593 }
594
595 // Add new node to way
596 if (way.getNode(way.getNodesCount() - 1) == n0) {
597 way.addNode(n);
598 } else {
599 way.addNode(0, n);
600 }
601
602 extendedWay = true;
603 newSelection.clear();
604 newSelection.add(wayToSelect);
605 }
606 }
607 if (!extendedWay && !newNode) {
608 return; // We didn't do anything.
609 }
610
611 String title = getTitle(newNode, n, newSelection, reuseWays, extendedWay);
612
613 Command c = new SequenceCommand(title, cmds);
614
615 Main.main.undoRedo.add(c);
616 if (!wayIsFinished) {
617 lastUsedNode = n;
618 }
619
620 ds.setSelected(newSelection);
621
622 // "viewport following" mode for tracing long features
623 // from aerial imagery or GPS tracks.
624 if (Main.map.mapView.viewportFollowing) {
625 Main.map.mapView.smoothScrollTo(n.getEastNorth());
626 }
627 computeHelperLine();
628 removeHighlighting();
629 }
630
631 private static String getTitle(boolean newNode, Node n, Collection<OsmPrimitive> newSelection, List<Way> reuseWays,
632 boolean extendedWay) {
633 String title;
634 if (!extendedWay) {
635 if (reuseWays.isEmpty()) {
636 title = tr("Add node");
637 } else {
638 title = tr("Add node into way");
639 for (Way w : reuseWays) {
640 newSelection.remove(w);
641 }
642 }
643 newSelection.clear();
644 newSelection.add(n);
645 } else if (!newNode) {
646 title = tr("Connect existing way to node");
647 } else if (reuseWays.isEmpty()) {
648 title = tr("Add a new node to an existing way");
649 } else {
650 title = tr("Add node into way and connect");
651 }
652 return title;
653 }
654
655 private void insertNodeIntoAllNearbySegments(List<WaySegment> wss, Node n, Collection<OsmPrimitive> newSelection,
656 Collection<Command> cmds, List<Way> replacedWays, List<Way> reuseWays) {
657 Map<Way, List<Integer>> insertPoints = new HashMap<>();
658 for (WaySegment ws : wss) {
659 List<Integer> is;
660 if (insertPoints.containsKey(ws.way)) {
661 is = insertPoints.get(ws.way);
662 } else {
663 is = new ArrayList<>();
664 insertPoints.put(ws.way, is);
665 }
666
667 is.add(ws.lowerIndex);
668 }
669
670 Set<Pair<Node, Node>> segSet = new HashSet<>();
671
672 for (Map.Entry<Way, List<Integer>> insertPoint : insertPoints.entrySet()) {
673 Way w = insertPoint.getKey();
674 List<Integer> is = insertPoint.getValue();
675
676 Way wnew = new Way(w);
677
678 pruneSuccsAndReverse(is);
679 for (int i : is) {
680 segSet.add(Pair.sort(new Pair<>(w.getNode(i), w.getNode(i+1))));
681 wnew.addNode(i + 1, n);
682 }
683
684 // If ALT is pressed, a new way should be created and that new way should get
685 // selected. This works everytime unless the ways the nodes get inserted into
686 // are already selected. This is the case when creating a self-overlapping way
687 // but pressing ALT prevents this. Therefore we must de-select the way manually
688 // here so /only/ the new way will be selected after this method finishes.
689 if (alt) {
690 newSelection.add(insertPoint.getKey());
691 }
692
693 cmds.add(new ChangeCommand(insertPoint.getKey(), wnew));
694 replacedWays.add(insertPoint.getKey());
695 reuseWays.add(wnew);
696 }
697
698 adjustNode(segSet, n);
699 }
700
701 /**
702 * Prevent creation of ways that look like this: &lt;----&gt;
703 * This happens if users want to draw a no-exit-sideway from the main way like this:
704 * ^
705 * |&lt;----&gt;
706 * |
707 * The solution isn't ideal because the main way will end in the side way, which is bad for
708 * navigation software ("drive straight on") but at least easier to fix. Maybe users will fix
709 * it on their own, too. At least it's better than producing an error.
710 *
711 * @param selectedWay the way to check
712 * @param currentNode the current node (i.e. the one the connection will be made from)
713 * @param targetNode the target node (i.e. the one the connection will be made to)
714 * @return {@code true} if this would create a selfcontaining way, {@code false} otherwise.
715 */
716 private boolean isSelfContainedWay(Way selectedWay, Node currentNode, Node targetNode) {
717 if (selectedWay != null) {
718 int posn0 = selectedWay.getNodes().indexOf(currentNode);
719 // CHECKSTYLE.OFF: SingleSpaceSeparator
720 if ((posn0 != -1 && // n0 is part of way
721 (posn0 >= 1 && targetNode.equals(selectedWay.getNode(posn0-1)))) || // previous node
722 (posn0 < selectedWay.getNodesCount()-1 && targetNode.equals(selectedWay.getNode(posn0+1)))) { // next node
723 getLayerManager().getEditDataSet().setSelected(targetNode);
724 lastUsedNode = targetNode;
725 return true;
726 }
727 // CHECKSTYLE.ON: SingleSpaceSeparator
728 }
729
730 return false;
731 }
732
733 /**
734 * Finds a node to continue drawing from. Decision is based upon given node and way.
735 * @param selectedNode Currently selected node, may be null
736 * @param selectedWay Currently selected way, may be null
737 * @return Node if a suitable node is found, null otherwise
738 */
739 private Node findNodeToContinueFrom(Node selectedNode, Way selectedWay) {
740 // No nodes or ways have been selected, this occurs when a relation
741 // has been selected or the selection is empty
742 if (selectedNode == null && selectedWay == null)
743 return null;
744
745 if (selectedNode == null) {
746 if (selectedWay.isFirstLastNode(lastUsedNode))
747 return lastUsedNode;
748
749 // We have a way selected, but no suitable node to continue from. Start anew.
750 return null;
751 }
752
753 if (selectedWay == null)
754 return selectedNode;
755
756 if (selectedWay.isFirstLastNode(selectedNode))
757 return selectedNode;
758
759 // We have a way and node selected, but it's not at the start/end of the way. Start anew.
760 return null;
761 }
762
763 @Override
764 public void mouseDragged(MouseEvent e) {
765 mouseMoved(e);
766 }
767
768 @Override
769 public void mouseMoved(MouseEvent e) {
770 if (!Main.map.mapView.isActiveLayerDrawable())
771 return;
772
773 // we copy ctrl/alt/shift from the event just in case our global
774 // keyDetector didn't make it through the security manager. Unclear
775 // if that can ever happen but better be safe.
776 updateKeyModifiers(e);
777 mousePos = e.getPoint();
778 if (snapHelper.isSnapOn() && ctrl)
779 tryToSetBaseSegmentForAngleSnap();
780
781 computeHelperLine();
782 addHighlighting();
783 }
784
785 /**
786 * This method is used to detect segment under mouse and use it as reference for angle snapping
787 */
788 private void tryToSetBaseSegmentForAngleSnap() {
789 WaySegment seg = Main.map.mapView.getNearestWaySegment(mousePos, OsmPrimitive::isSelectable);
790 if (seg != null) {
791 snapHelper.setBaseSegment(seg);
792 }
793 }
794
795 /**
796 * This method prepares data required for painting the "helper line" from
797 * the last used position to the mouse cursor. It duplicates some code from
798 * mouseReleased() (FIXME).
799 */
800 private void computeHelperLine() {
801 if (mousePos == null) {
802 // Don't draw the line.
803 currentMouseEastNorth = null;
804 currentBaseNode = null;
805 return;
806 }
807
808 Collection<OsmPrimitive> selection = getLayerManager().getEditDataSet().getSelected();
809
810 MapView mv = Main.map.mapView;
811 Node currentMouseNode = null;
812 mouseOnExistingNode = null;
813 mouseOnExistingWays = new HashSet<>();
814
815 showStatusInfo(-1, -1, -1, snapHelper.isSnapOn());
816
817 if (!ctrl && mousePos != null) {
818 currentMouseNode = mv.getNearestNode(mousePos, OsmPrimitive::isSelectable);
819 }
820
821 // We need this for highlighting and we'll only do so if we actually want to re-use
822 // *and* there is no node nearby (because nodes beat ways when re-using)
823 if (!ctrl && currentMouseNode == null) {
824 List<WaySegment> wss = mv.getNearestWaySegments(mousePos, OsmPrimitive::isSelectable);
825 for (WaySegment ws : wss) {
826 mouseOnExistingWays.add(ws.way);
827 }
828 }
829
830 if (currentMouseNode != null) {
831 // user clicked on node
832 if (selection.isEmpty()) return;
833 currentMouseEastNorth = currentMouseNode.getEastNorth();
834 mouseOnExistingNode = currentMouseNode;
835 } else {
836 // no node found in clicked area
837 currentMouseEastNorth = mv.getEastNorth(mousePos.x, mousePos.y);
838 }
839
840 determineCurrentBaseNodeAndPreviousNode(selection);
841 if (previousNode == null) {
842 snapHelper.noSnapNow();
843 }
844
845 if (getCurrentBaseNode() == null || getCurrentBaseNode() == currentMouseNode)
846 return; // Don't create zero length way segments.
847
848
849 double curHdg = Math.toDegrees(getCurrentBaseNode().getEastNorth()
850 .heading(currentMouseEastNorth));
851 double baseHdg = -1;
852 if (previousNode != null) {
853 EastNorth en = previousNode.getEastNorth();
854 if (en != null) {
855 baseHdg = Math.toDegrees(en.heading(getCurrentBaseNode().getEastNorth()));
856 }
857 }
858
859 snapHelper.checkAngleSnapping(currentMouseEastNorth, baseHdg, curHdg);
860
861 // status bar was filled by snapHelper
862 }
863
864 static void showStatusInfo(double angle, double hdg, double distance, boolean activeFlag) {
865 Main.map.statusLine.setAngle(angle);
866 Main.map.statusLine.activateAnglePanel(activeFlag);
867 Main.map.statusLine.setHeading(hdg);
868 Main.map.statusLine.setDist(distance);
869 }
870
871 /**
872 * Helper function that sets fields currentBaseNode and previousNode
873 * @param selection
874 * uses also lastUsedNode field
875 */
876 private void determineCurrentBaseNodeAndPreviousNode(Collection<OsmPrimitive> selection) {
877 Node selectedNode = null;
878 Way selectedWay = null;
879 for (OsmPrimitive p : selection) {
880 if (p instanceof Node) {
881 if (selectedNode != null)
882 return;
883 selectedNode = (Node) p;
884 } else if (p instanceof Way) {
885 if (selectedWay != null)
886 return;
887 selectedWay = (Way) p;
888 }
889 }
890 // we are here, if not more than 1 way or node is selected,
891
892 // the node from which we make a connection
893 currentBaseNode = null;
894 previousNode = null;
895
896 // Try to find an open way to measure angle from it. The way is not to be continued!
897 // warning: may result in changes of currentBaseNode and previousNode
898 // please remove if bugs arise
899 if (selectedWay == null && selectedNode != null) {
900 for (OsmPrimitive p: selectedNode.getReferrers()) {
901 if (p.isUsable() && p instanceof Way && ((Way) p).isFirstLastNode(selectedNode)) {
902 if (selectedWay != null) { // two uncontinued ways, nothing to take as reference
903 selectedWay = null;
904 break;
905 } else {
906 // set us ~continue this way (measure angle from it)
907 selectedWay = (Way) p;
908 }
909 }
910 }
911 }
912
913 if (selectedNode == null) {
914 if (selectedWay == null)
915 return;
916 continueWayFromNode(selectedWay, lastUsedNode);
917 } else if (selectedWay == null) {
918 currentBaseNode = selectedNode;
919 } else if (!selectedWay.isDeleted()) { // fix #7118
920 continueWayFromNode(selectedWay, selectedNode);
921 }
922 }
923
924 /**
925 * if one of the ends of {@code way} is given {@code node},
926 * then set currentBaseNode = node and previousNode = adjacent node of way
927 * @param way way to continue
928 * @param node starting node
929 */
930 private void continueWayFromNode(Way way, Node node) {
931 int n = way.getNodesCount();
932 if (node == way.firstNode()) {
933 currentBaseNode = node;
934 if (n > 1) previousNode = way.getNode(1);
935 } else if (node == way.lastNode()) {
936 currentBaseNode = node;
937 if (n > 1) previousNode = way.getNode(n-2);
938 }
939 }
940
941 /**
942 * Repaint on mouse exit so that the helper line goes away.
943 */
944 @Override
945 public void mouseExited(MouseEvent e) {
946 OsmDataLayer editLayer = Main.getLayerManager().getEditLayer();
947 if (editLayer == null)
948 return;
949 mousePos = e.getPoint();
950 snapHelper.noSnapNow();
951 boolean repaintIssued = removeHighlighting();
952 // force repaint in case snapHelper needs one. If removeHighlighting
953 // caused one already, don't do it again.
954 if (!repaintIssued) {
955 editLayer.invalidate();
956 }
957 }
958
959 /**
960 * @param n node
961 * @return If the node is the end of exactly one way, return this.
962 * <code>null</code> otherwise.
963 */
964 public static Way getWayForNode(Node n) {
965 Way way = null;
966 for (Way w : Utils.filteredCollection(n.getReferrers(), Way.class)) {
967 if (!w.isUsable() || w.getNodesCount() < 1) {
968 continue;
969 }
970 Node firstNode = w.getNode(0);
971 Node lastNode = w.getNode(w.getNodesCount() - 1);
972 if ((firstNode == n || lastNode == n) && (firstNode != lastNode)) {
973 if (way != null)
974 return null;
975 way = w;
976 }
977 }
978 return way;
979 }
980
981 /**
982 * Replies the current base node, after having checked it is still usable (see #11105).
983 * @return the current base node (can be null). If not-null, it's guaranteed the node is usable
984 */
985 public Node getCurrentBaseNode() {
986 if (currentBaseNode != null && (currentBaseNode.getDataSet() == null || !currentBaseNode.isUsable())) {
987 currentBaseNode = null;
988 }
989 return currentBaseNode;
990 }
991
992 private static void pruneSuccsAndReverse(List<Integer> is) {
993 Set<Integer> is2 = new HashSet<>();
994 for (int i : is) {
995 if (!is2.contains(i - 1) && !is2.contains(i + 1)) {
996 is2.add(i);
997 }
998 }
999 is.clear();
1000 is.addAll(is2);
1001 Collections.sort(is);
1002 Collections.reverse(is);
1003 }
1004
1005 /**
1006 * Adjusts the position of a node to lie on a segment (or a segment intersection).
1007 *
1008 * If one or more than two segments are passed, the node is adjusted
1009 * to lie on the first segment that is passed.
1010 *
1011 * If two segments are passed, the node is adjusted to be at their intersection.
1012 *
1013 * No action is taken if no segments are passed.
1014 *
1015 * @param segs the segments to use as a reference when adjusting
1016 * @param n the node to adjust
1017 */
1018 private static void adjustNode(Collection<Pair<Node, Node>> segs, Node n) {
1019 switch (segs.size()) {
1020 case 0:
1021 return;
1022 case 2:
1023 adjustNodeTwoSegments(segs, n);
1024 break;
1025 default:
1026 adjustNodeDefault(segs, n);
1027 }
1028 }
1029
1030 private static void adjustNodeTwoSegments(Collection<Pair<Node, Node>> segs, Node n) {
1031 // This computes the intersection between the two segments and adjusts the node position.
1032 Iterator<Pair<Node, Node>> i = segs.iterator();
1033 Pair<Node, Node> seg = i.next();
1034 EastNorth pA = seg.a.getEastNorth();
1035 EastNorth pB = seg.b.getEastNorth();
1036 seg = i.next();
1037 EastNorth pC = seg.a.getEastNorth();
1038 EastNorth pD = seg.b.getEastNorth();
1039
1040 double u = det(pB.east() - pA.east(), pB.north() - pA.north(), pC.east() - pD.east(), pC.north() - pD.north());
1041
1042 // Check for parallel segments and do nothing if they are
1043 // In practice this will probably only happen when a way has been duplicated
1044
1045 if (u == 0)
1046 return;
1047
1048 // q is a number between 0 and 1
1049 // It is the point in the segment where the intersection occurs
1050 // if the segment is scaled to length 1
1051
1052 double q = det(pB.north() - pC.north(), pB.east() - pC.east(), pD.north() - pC.north(), pD.east() - pC.east()) / u;
1053 EastNorth intersection = new EastNorth(
1054 pB.east() + q * (pA.east() - pB.east()),
1055 pB.north() + q * (pA.north() - pB.north()));
1056
1057
1058 // only adjust to intersection if within snapToIntersectionThreshold pixel of mouse click; otherwise
1059 // fall through to default action.
1060 // (for semi-parallel lines, intersection might be miles away!)
1061 if (Main.map.mapView.getPoint2D(n).distance(Main.map.mapView.getPoint2D(intersection)) < SNAP_TO_INTERSECTION_THRESHOLD.get()) {
1062 n.setEastNorth(intersection);
1063 return;
1064 }
1065
1066 adjustNodeDefault(segs, n);
1067 }
1068
1069 private static void adjustNodeDefault(Collection<Pair<Node, Node>> segs, Node n) {
1070 EastNorth p = n.getEastNorth();
1071 Pair<Node, Node> seg = segs.iterator().next();
1072 EastNorth pA = seg.a.getEastNorth();
1073 EastNorth pB = seg.b.getEastNorth();
1074 double a = p.distanceSq(pB);
1075 double b = p.distanceSq(pA);
1076 double c = pA.distanceSq(pB);
1077 double q = (a - b + c) / (2*c);
1078 n.setEastNorth(new EastNorth(pB.east() + q * (pA.east() - pB.east()), pB.north() + q * (pA.north() - pB.north())));
1079 }
1080
1081 // helper for adjustNode
1082 static double det(double a, double b, double c, double d) {
1083 return a * d - b * c;
1084 }
1085
1086 private void tryToMoveNodeOnIntersection(List<WaySegment> wss, Node n) {
1087 if (wss.isEmpty())
1088 return;
1089 WaySegment ws = wss.get(0);
1090 EastNorth p1 = ws.getFirstNode().getEastNorth();
1091 EastNorth p2 = ws.getSecondNode().getEastNorth();
1092 if (snapHelper.dir2 != null && getCurrentBaseNode() != null) {
1093 EastNorth xPoint = Geometry.getSegmentSegmentIntersection(p1, p2, snapHelper.dir2,
1094 getCurrentBaseNode().getEastNorth());
1095 if (xPoint != null) {
1096 n.setEastNorth(xPoint);
1097 }
1098 }
1099 }
1100
1101 /**
1102 * Takes the data from computeHelperLine to determine which ways/nodes should be highlighted
1103 * (if feature enabled). Also sets the target cursor if appropriate. It adds the to-be-
1104 * highlighted primitives to newHighlights but does not actually highlight them. This work is
1105 * done in redrawIfRequired. This means, calling addHighlighting() without redrawIfRequired()
1106 * will leave the data in an inconsistent state.
1107 *
1108 * The status bar derives its information from oldHighlights, so in order to update the status
1109 * bar both addHighlighting() and repaintIfRequired() are needed, since former fills newHighlights
1110 * and latter processes them into oldHighlights.
1111 */
1112 private void addHighlighting() {
1113 newHighlights = new HashSet<>();
1114
1115 // if ctrl key is held ("no join"), don't highlight anything
1116 if (ctrl) {
1117 Main.map.mapView.setNewCursor(cursor, this);
1118 redrawIfRequired();
1119 return;
1120 }
1121
1122 // This happens when nothing is selected, but we still want to highlight the "target node"
1123 if (mouseOnExistingNode == null && mousePos != null && getLayerManager().getEditDataSet().selectionEmpty()) {
1124 mouseOnExistingNode = Main.map.mapView.getNearestNode(mousePos, OsmPrimitive::isSelectable);
1125 }
1126
1127 if (mouseOnExistingNode != null) {
1128 Main.map.mapView.setNewCursor(cursorJoinNode, this);
1129 newHighlights.add(mouseOnExistingNode);
1130 redrawIfRequired();
1131 return;
1132 }
1133
1134 // Insert the node into all the nearby way segments
1135 if (mouseOnExistingWays.isEmpty()) {
1136 Main.map.mapView.setNewCursor(cursor, this);
1137 redrawIfRequired();
1138 return;
1139 }
1140
1141 Main.map.mapView.setNewCursor(cursorJoinWay, this);
1142 newHighlights.addAll(mouseOnExistingWays);
1143 redrawIfRequired();
1144 }
1145
1146 /**
1147 * Removes target highlighting from primitives. Issues repaint if required.
1148 * @return true if a repaint has been issued.
1149 */
1150 private boolean removeHighlighting() {
1151 newHighlights = new HashSet<>();
1152 return redrawIfRequired();
1153 }
1154
1155 @Override
1156 public void paint(Graphics2D g, MapView mv, Bounds box) {
1157 // sanity checks
1158 if (Main.map.mapView == null || mousePos == null
1159 // don't draw line if we don't know where from or where to
1160 || currentMouseEastNorth == null || getCurrentBaseNode() == null
1161 // don't draw line if mouse is outside window
1162 || !Main.map.mapView.getBounds().contains(mousePos))
1163 return;
1164
1165 Graphics2D g2 = g;
1166 snapHelper.drawIfNeeded(g2, mv.getState());
1167 if (!DRAW_HELPER_LINE.get() || wayIsFinished || shift)
1168 return;
1169
1170 if (!snapHelper.isActive()) {
1171 g2.setColor(RUBBER_LINE_COLOR.get());
1172 g2.setStroke(RUBBER_LINE_STROKE.get());
1173 paintConstructionGeometry(mv, g2);
1174 } else if (DRAW_CONSTRUCTION_GEOMETRY.get()) {
1175 // else use color and stoke from snapHelper.draw
1176 paintConstructionGeometry(mv, g2);
1177 }
1178 }
1179
1180 private void paintConstructionGeometry(MapView mv, Graphics2D g2) {
1181 MapPath2D b = new MapPath2D();
1182 MapViewPoint p1 = mv.getState().getPointFor(getCurrentBaseNode());
1183 MapViewPoint p2 = mv.getState().getPointFor(currentMouseEastNorth);
1184
1185 b.moveTo(p1);
1186 b.lineTo(p2);
1187
1188 // if alt key is held ("start new way"), draw a little perpendicular line
1189 if (alt) {
1190 START_WAY_INDICATOR.paintArrowAt(b, p1, p2);
1191 }
1192
1193 g2.draw(b);
1194 g2.setStroke(BASIC_STROKE);
1195 }
1196
1197 @Override
1198 public String getModeHelpText() {
1199 StringBuilder rv;
1200 /*
1201 * No modifiers: all (Connect, Node Re-Use, Auto-Weld)
1202 * CTRL: disables node re-use, auto-weld
1203 * Shift: do not make connection
1204 * ALT: make connection but start new way in doing so
1205 */
1206
1207 /*
1208 * Status line text generation is split into two parts to keep it maintainable.
1209 * First part looks at what will happen to the new node inserted on click and
1210 * the second part will look if a connection is made or not.
1211 *
1212 * Note that this help text is not absolutely accurate as it doesn't catch any special
1213 * cases (e.g. when preventing <---> ways). The only special that it catches is when
1214 * a way is about to be finished.
1215 *
1216 * First check what happens to the new node.
1217 */
1218
1219 // oldHighlights stores the current highlights. If this
1220 // list is empty we can assume that we won't do any joins
1221 if (ctrl || oldHighlights.isEmpty()) {
1222 rv = new StringBuilder(tr("Create new node."));
1223 } else {
1224 // oldHighlights may store a node or way, check if it's a node
1225 OsmPrimitive x = oldHighlights.iterator().next();
1226 if (x instanceof Node) {
1227 rv = new StringBuilder(tr("Select node under cursor."));
1228 } else {
1229 rv = new StringBuilder(trn("Insert new node into way.", "Insert new node into {0} ways.",
1230 oldHighlights.size(), oldHighlights.size()));
1231 }
1232 }
1233
1234 /*
1235 * Check whether a connection will be made
1236 */
1237 if (!wayIsFinished && getCurrentBaseNode() != null) {
1238 if (alt) {
1239 rv.append(' ').append(tr("Start new way from last node."));
1240 } else {
1241 rv.append(' ').append(tr("Continue way from last node."));
1242 }
1243 if (snapHelper.isSnapOn()) {
1244 rv.append(' ').append(tr("Angle snapping active."));
1245 }
1246 }
1247
1248 Node n = mouseOnExistingNode;
1249 DataSet ds = getLayerManager().getEditDataSet();
1250 /*
1251 * Handle special case: Highlighted node == selected node => finish drawing
1252 */
1253 if (n != null && ds != null && ds.getSelectedNodes().contains(n)) {
1254 if (wayIsFinished) {
1255 rv = new StringBuilder(tr("Select node under cursor."));
1256 } else {
1257 rv = new StringBuilder(tr("Finish drawing."));
1258 }
1259 }
1260
1261 /*
1262 * Handle special case: Self-Overlapping or closing way
1263 */
1264 if (ds != null && !ds.getSelectedWays().isEmpty() && !wayIsFinished && !alt) {
1265 Way w = ds.getSelectedWays().iterator().next();
1266 for (Node m : w.getNodes()) {
1267 if (m.equals(mouseOnExistingNode) || mouseOnExistingWays.contains(w)) {
1268 rv.append(' ').append(tr("Finish drawing."));
1269 break;
1270 }
1271 }
1272 }
1273 return rv.toString();
1274 }
1275
1276 /**
1277 * Get selected primitives, while draw action is in progress.
1278 *
1279 * While drawing a way, technically the last node is selected.
1280 * This is inconvenient when the user tries to add/edit tags to the way.
1281 * For this case, this method returns the current way as selection,
1282 * to work around this issue.
1283 * Otherwise the normal selection of the current data layer is returned.
1284 * @return selected primitives, while draw action is in progress
1285 */
1286 public Collection<OsmPrimitive> getInProgressSelection() {
1287 DataSet ds = getLayerManager().getEditDataSet();
1288 if (ds == null) return null;
1289 if (getCurrentBaseNode() != null && !ds.selectionEmpty()) {
1290 Way continueFrom = getWayForNode(getCurrentBaseNode());
1291 if (continueFrom != null)
1292 return Collections.<OsmPrimitive>singleton(continueFrom);
1293 }
1294 return ds.getSelected();
1295 }
1296
1297 @Override
1298 public boolean layerIsSupported(Layer l) {
1299 return l instanceof OsmDataLayer;
1300 }
1301
1302 @Override
1303 protected void updateEnabledState() {
1304 setEnabled(getLayerManager().getEditLayer() != null);
1305 }
1306
1307 @Override
1308 public void destroy() {
1309 super.destroy();
1310 snapChangeAction.destroy();
1311 }
1312
1313 public class BackSpaceAction extends AbstractAction {
1314
1315 @Override
1316 public void actionPerformed(ActionEvent e) {
1317 Main.main.undoRedo.undo();
1318 Command lastCmd = Main.main.undoRedo.commands.peekLast();
1319 if (lastCmd == null) return;
1320 Node n = null;
1321 for (OsmPrimitive p: lastCmd.getParticipatingPrimitives()) {
1322 if (p instanceof Node) {
1323 if (n == null) {
1324 n = (Node) p; // found one node
1325 wayIsFinished = false;
1326 } else {
1327 // if more than 1 node were affected by previous command,
1328 // we have no way to continue, so we forget about found node
1329 n = null;
1330 break;
1331 }
1332 }
1333 }
1334 // select last added node - maybe we will continue drawing from it
1335 if (n != null) {
1336 getLayerManager().getEditDataSet().addSelected(n);
1337 }
1338 }
1339 }
1340
1341 private class SnapChangeAction extends JosmAction {
1342 /**
1343 * Constructs a new {@code SnapChangeAction}.
1344 */
1345 SnapChangeAction() {
1346 super(tr("Angle snapping"), /* ICON() */ "anglesnap",
1347 tr("Switch angle snapping mode while drawing"), null, false);
1348 putValue("help", ht("/Action/Draw/AngleSnap"));
1349 }
1350
1351 @Override
1352 public void actionPerformed(ActionEvent e) {
1353 if (snapHelper != null) {
1354 snapHelper.toggleSnapping();
1355 }
1356 }
1357
1358 @Override
1359 protected void updateEnabledState() {
1360 setEnabled(Main.map != null && Main.map.mapMode instanceof DrawAction);
1361 }
1362 }
1363}
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