001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.gui.dialogs;
003
004import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
005import static org.openstreetmap.josm.tools.I18n.tr;
006import static org.openstreetmap.josm.tools.I18n.trn;
007
008import java.awt.BorderLayout;
009import java.awt.Dimension;
010import java.awt.FlowLayout;
011import java.awt.event.ActionEvent;
012import java.awt.event.WindowAdapter;
013import java.awt.event.WindowEvent;
014import java.util.ArrayList;
015import java.util.Collection;
016import java.util.Collections;
017import java.util.Comparator;
018import java.util.HashSet;
019import java.util.List;
020import java.util.Set;
021
022import javax.swing.AbstractAction;
023import javax.swing.JDialog;
024import javax.swing.JPanel;
025import javax.swing.JScrollPane;
026import javax.swing.JTable;
027import javax.swing.event.TableModelEvent;
028import javax.swing.event.TableModelListener;
029import javax.swing.table.DefaultTableColumnModel;
030import javax.swing.table.DefaultTableModel;
031import javax.swing.table.TableColumn;
032
033import org.openstreetmap.josm.Main;
034import org.openstreetmap.josm.data.osm.NameFormatter;
035import org.openstreetmap.josm.data.osm.OsmPrimitive;
036import org.openstreetmap.josm.data.osm.RelationToChildReference;
037import org.openstreetmap.josm.gui.DefaultNameFormatter;
038import org.openstreetmap.josm.gui.OsmPrimitivRenderer;
039import org.openstreetmap.josm.gui.SideButton;
040import org.openstreetmap.josm.gui.help.ContextSensitiveHelpAction;
041import org.openstreetmap.josm.gui.help.HelpUtil;
042import org.openstreetmap.josm.gui.util.GuiHelper;
043import org.openstreetmap.josm.gui.widgets.HtmlPanel;
044import org.openstreetmap.josm.tools.I18n;
045import org.openstreetmap.josm.tools.ImageProvider;
046import org.openstreetmap.josm.tools.WindowGeometry;
047
048/**
049 * This dialog is used to get a user confirmation that a collection of primitives can be removed
050 * from their parent relations.
051 * @since 2308
052 */
053public class DeleteFromRelationConfirmationDialog extends JDialog implements TableModelListener {
054    /** the unique instance of this dialog */
055    private static DeleteFromRelationConfirmationDialog instance;
056
057    /**
058     * Replies the unique instance of this dialog
059     *
060     * @return The unique instance of this dialog
061     */
062    public static synchronized DeleteFromRelationConfirmationDialog getInstance() {
063        if (instance == null) {
064            instance = new DeleteFromRelationConfirmationDialog();
065        }
066        return instance;
067    }
068
069    /** the data model */
070    private RelationMemberTableModel model;
071    private final HtmlPanel htmlPanel = new HtmlPanel();
072    private boolean canceled;
073    private final SideButton btnOK = new SideButton(new OKAction());
074
075    protected JPanel buildRelationMemberTablePanel() {
076        JTable table = new JTable(model, new RelationMemberTableColumnModel());
077        JPanel pnl = new JPanel(new BorderLayout());
078        pnl.add(new JScrollPane(table));
079        return pnl;
080    }
081
082    protected JPanel buildButtonPanel() {
083        JPanel pnl = new JPanel(new FlowLayout());
084        pnl.add(btnOK);
085        btnOK.setFocusable(true);
086        pnl.add(new SideButton(new CancelAction()));
087        pnl.add(new SideButton(new ContextSensitiveHelpAction(ht("/Action/Delete#DeleteFromRelations"))));
088        return pnl;
089    }
090
091    protected final void build() {
092        model = new RelationMemberTableModel();
093        model.addTableModelListener(this);
094        getContentPane().setLayout(new BorderLayout());
095        getContentPane().add(htmlPanel, BorderLayout.NORTH);
096        getContentPane().add(buildRelationMemberTablePanel(), BorderLayout.CENTER);
097        getContentPane().add(buildButtonPanel(), BorderLayout.SOUTH);
098
099        HelpUtil.setHelpContext(this.getRootPane(), ht("/Action/Delete#DeleteFromRelations"));
100
101        addWindowListener(new WindowEventHandler());
102    }
103
104    protected void updateMessage() {
105        int numObjectsToDelete = model.getNumObjectsToDelete();
106        int numParentRelations = model.getNumParentRelations();
107        final String msg1 = trn(
108                "Please confirm to remove <strong>{0} object</strong>.",
109                "Please confirm to remove <strong>{0} objects</strong>.",
110                numObjectsToDelete, numObjectsToDelete);
111        final String msg2 = trn(
112                "{0} relation is affected.",
113                "{0} relations are affected.",
114                numParentRelations, numParentRelations);
115        @I18n.QuirkyPluralString
116        final String msg = "<html>" + msg1 + ' ' + msg2 + "</html>";
117        htmlPanel.getEditorPane().setText(msg);
118        invalidate();
119    }
120
121    protected void updateTitle() {
122        int numObjectsToDelete = model.getNumObjectsToDelete();
123        if (numObjectsToDelete > 0) {
124            setTitle(trn("Deleting {0} object", "Deleting {0} objects", numObjectsToDelete, numObjectsToDelete));
125        } else {
126            setTitle(tr("Delete objects"));
127        }
128    }
129
130    /**
131     * Constructs a new {@code DeleteFromRelationConfirmationDialog}.
132     */
133    public DeleteFromRelationConfirmationDialog() {
134        super(GuiHelper.getFrameForComponent(Main.parent), "", ModalityType.DOCUMENT_MODAL);
135        build();
136    }
137
138    /**
139     * Replies the data model used in this dialog
140     *
141     * @return the data model
142     */
143    public RelationMemberTableModel getModel() {
144        return model;
145    }
146
147    /**
148     * Replies true if the dialog was canceled
149     *
150     * @return true if the dialog was canceled
151     */
152    public boolean isCanceled() {
153        return canceled;
154    }
155
156    protected void setCanceled(boolean canceled) {
157        this.canceled = canceled;
158    }
159
160    @Override
161    public void setVisible(boolean visible) {
162        if (visible) {
163            new WindowGeometry(
164                    getClass().getName() + ".geometry",
165                    WindowGeometry.centerInWindow(
166                            Main.parent,
167                            new Dimension(400, 200)
168                    )
169            ).applySafe(this);
170            setCanceled(false);
171        } else if (isShowing()) { // Avoid IllegalComponentStateException like in #8775
172            new WindowGeometry(this).remember(getClass().getName() + ".geometry");
173        }
174        super.setVisible(visible);
175    }
176
177    @Override
178    public void tableChanged(TableModelEvent e) {
179        updateMessage();
180        updateTitle();
181    }
182
183    /**
184     * The table model which manages the list of relation-to-child references
185     *
186     */
187    public static class RelationMemberTableModel extends DefaultTableModel {
188        private final transient List<RelationToChildReference> data;
189
190        /**
191         * Constructs a new {@code RelationMemberTableModel}.
192         */
193        public RelationMemberTableModel() {
194            data = new ArrayList<>();
195        }
196
197        @Override
198        public int getRowCount() {
199            if (data == null) return 0;
200            return data.size();
201        }
202
203        protected void sort() {
204            Collections.sort(
205                    data,
206                    new Comparator<RelationToChildReference>() {
207                        private NameFormatter nf = DefaultNameFormatter.getInstance();
208                        @Override
209                        public int compare(RelationToChildReference o1, RelationToChildReference o2) {
210                            int cmp = o1.getChild().getDisplayName(nf).compareTo(o2.getChild().getDisplayName(nf));
211                            if (cmp != 0) return cmp;
212                            cmp = o1.getParent().getDisplayName(nf).compareTo(o2.getParent().getDisplayName(nf));
213                            if (cmp != 0) return cmp;
214                            return Integer.compare(o1.getPosition(), o2.getPosition());
215                        }
216                    }
217            );
218        }
219
220        public void populate(Collection<RelationToChildReference> references) {
221            data.clear();
222            if (references != null) {
223                data.addAll(references);
224            }
225            sort();
226            fireTableDataChanged();
227        }
228
229        public Set<OsmPrimitive> getObjectsToDelete() {
230            Set<OsmPrimitive> ret = new HashSet<>();
231            for (RelationToChildReference ref: data) {
232                ret.add(ref.getChild());
233            }
234            return ret;
235        }
236
237        public int getNumObjectsToDelete() {
238            return getObjectsToDelete().size();
239        }
240
241        public Set<OsmPrimitive> getParentRelations() {
242            Set<OsmPrimitive> ret = new HashSet<>();
243            for (RelationToChildReference ref: data) {
244                ret.add(ref.getParent());
245            }
246            return ret;
247        }
248
249        public int getNumParentRelations() {
250            return getParentRelations().size();
251        }
252
253        @Override
254        public Object getValueAt(int rowIndex, int columnIndex) {
255            if (data == null) return null;
256            RelationToChildReference ref = data.get(rowIndex);
257            switch(columnIndex) {
258            case 0: return ref.getChild();
259            case 1: return ref.getParent();
260            case 2: return ref.getPosition()+1;
261            case 3: return ref.getRole();
262            default:
263                assert false : "Illegal column index";
264            }
265            return null;
266        }
267
268        @Override
269        public boolean isCellEditable(int row, int column) {
270            return false;
271        }
272    }
273
274    private static class RelationMemberTableColumnModel extends DefaultTableColumnModel {
275
276        protected final void createColumns() {
277
278            // column 0 - To Delete
279            TableColumn col = new TableColumn(0);
280            col.setHeaderValue(tr("To delete"));
281            col.setResizable(true);
282            col.setWidth(100);
283            col.setPreferredWidth(100);
284            col.setCellRenderer(new OsmPrimitivRenderer());
285            addColumn(col);
286
287            // column 0 - From Relation
288            col = new TableColumn(1);
289            col.setHeaderValue(tr("From Relation"));
290            col.setResizable(true);
291            col.setWidth(100);
292            col.setPreferredWidth(100);
293            col.setCellRenderer(new OsmPrimitivRenderer());
294            addColumn(col);
295
296            // column 1 - Pos.
297            col = new TableColumn(2);
298            col.setHeaderValue(tr("Pos."));
299            col.setResizable(true);
300            col.setWidth(30);
301            col.setPreferredWidth(30);
302            addColumn(col);
303
304            // column 2 - Role
305            col = new TableColumn(3);
306            col.setHeaderValue(tr("Role"));
307            col.setResizable(true);
308            col.setWidth(50);
309            col.setPreferredWidth(50);
310            addColumn(col);
311        }
312
313        RelationMemberTableColumnModel() {
314            createColumns();
315        }
316    }
317
318    class OKAction extends AbstractAction {
319        OKAction() {
320            putValue(NAME, tr("OK"));
321            new ImageProvider("ok").getResource().attachImageIcon(this);
322            putValue(SHORT_DESCRIPTION, tr("Click to close the dialog and remove the object from the relations"));
323        }
324
325        @Override
326        public void actionPerformed(ActionEvent e) {
327            setCanceled(false);
328            setVisible(false);
329        }
330    }
331
332    class CancelAction extends AbstractAction {
333        CancelAction() {
334            putValue(NAME, tr("Cancel"));
335            new ImageProvider("cancel").getResource().attachImageIcon(this);
336            putValue(SHORT_DESCRIPTION, tr("Click to close the dialog and to abort deleting the objects"));
337        }
338
339        @Override
340        public void actionPerformed(ActionEvent e) {
341            setCanceled(true);
342            setVisible(false);
343        }
344    }
345
346    class WindowEventHandler extends WindowAdapter {
347
348        @Override
349        public void windowClosing(WindowEvent e) {
350            setCanceled(true);
351        }
352
353        @Override
354        public void windowOpened(WindowEvent e) {
355            btnOK.requestFocusInWindow();
356        }
357    }
358}