Method paste

src/main/java/mudmap2/CopyPaste.java:129–232

Pastes the cut / copied places to layer, if possible @param x @param y @param layer @return false on error or user abort

(final int x, final int y, final Layer layer)

     * @return false on error or user abort
     */
    public static boolean paste(final int x, final int y, final Layer layer) {
        if (!canPaste(x, y, layer)) {
            return false;
        }

        // ask user
        final String title = (copyMode ? "Copy " : "Paste ") + "place(s)";
        final String message = title + "? This can not be undone!" + (copyPlaces.iterator().next().getLayer().getWorld() != layer.getWorld() ? " Pasting to another world might cause problems!" : "");
        final int ret = JOptionPane.showConfirmDialog(null, message, title, JOptionPane.YES_NO_OPTION);
        if (ret == JOptionPane.YES_OPTION) {
            // map to translate from old to new place
            final HashMap<Place, Place> place_to_new_place = new HashMap<Place, Place>();

            Place[] places;

            if (copyMode) {
                places = copyPlaces.toArray(new Place[copyPlaces.size()]);
            } else {
                // getPlace movement direction
                final int fact_x = x <= copydx ? 1 : -1;
                final int fact_y = y <= copydy ? 1 : -1;

                // sort places
                final ArrayList<Place> ordered_places = new ArrayList<>(copyPlaces);
                Collections.sort(ordered_places, new Comparator<Place>() {
                    @Override
                    public int compare(final Place t, final Place t1) {
                        // order by movement direction:
                        // places that might collide with other places in the
                        // list will be moved first
                        if (fact_x * t.getX() > fact_x * t1.getX()) {
                            return 1;
                        } else if (t.getX() == t1.getX()) {
                            if (fact_y * t.getY() > fact_y * t1.getY()) {
                                return 1;
                            } else if (t.getY() == t1.getY()) {
                                return 0;
                            }
                        }
                        return -1;
                    }
                });

                places = ordered_places.toArray(new Place[ordered_places.size()]);
            }

            // copy places
            for (final Place place : places) {
                try {
                    if (place.getLayer().getWorld() != layer.getWorld()) {
                        if (place.getPlaceGroup() != null && !layer.getWorld().getPlaceGroups().contains(place.getPlaceGroup())) {
                            layer.getWorld().addPlaceGroup(place.getPlaceGroup());
                        }
                    }
                    if (copyMode) { // copy places -> duplicate on new layer
                        final Place new_place = place.duplicate();
                        place_to_new_place.put(place, new_place);
                        layer.put(new_place, place.getX() - copydx + x, place.getY() - copydy + y);