001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.data.osm;
003
004import static org.openstreetmap.josm.tools.I18n.tr;
005import static org.openstreetmap.josm.tools.I18n.trn;
006
007import java.awt.Graphics2D;
008import java.util.ArrayList;
009import java.util.Collection;
010import java.util.Collections;
011import java.util.HashSet;
012import java.util.LinkedList;
013import java.util.List;
014import java.util.Set;
015import java.util.Stack;
016
017import javax.swing.JOptionPane;
018
019import org.openstreetmap.josm.data.SortableModel;
020import org.openstreetmap.josm.data.StructUtils;
021import org.openstreetmap.josm.data.osm.Filter.FilterPreferenceEntry;
022import org.openstreetmap.josm.data.osm.search.SearchParseError;
023import org.openstreetmap.josm.gui.MainApplication;
024import org.openstreetmap.josm.gui.widgets.OSDLabel;
025import org.openstreetmap.josm.spi.preferences.Config;
026import org.openstreetmap.josm.tools.Logging;
027import org.openstreetmap.josm.tools.Utils;
028
029/**
030 * The model that is used both for auto and manual filters.
031 * @since 12400
032 */
033public class FilterModel implements SortableModel<Filter> {
034
035    /**
036     * number of primitives that are disabled but not hidden
037     */
038    private int disabledCount;
039    /**
040     * number of primitives that are disabled and hidden
041     */
042    private int disabledAndHiddenCount;
043    /**
044     * true, if the filter state (normal / disabled / hidden) of any primitive has changed in the process
045     */
046    private boolean changed;
047
048    private final List<Filter> filters = new LinkedList<>();
049    private final FilterMatcher filterMatcher = new FilterMatcher();
050
051    private void updateFilterMatcher() {
052        filterMatcher.reset();
053        for (Filter filter : filters) {
054            try {
055                filterMatcher.add(filter);
056            } catch (SearchParseError e) {
057                Logging.error(e);
058                JOptionPane.showMessageDialog(
059                        MainApplication.getMainFrame(),
060                        tr("<html>Error in filter <code>{0}</code>:<br>{1}",
061                                Utils.escapeReservedCharactersHTML(Utils.shortenString(filter.text, 80)),
062                                Utils.escapeReservedCharactersHTML(e.getMessage())),
063                        tr("Error in filter"),
064                        JOptionPane.ERROR_MESSAGE);
065                filter.enable = false;
066            }
067        }
068    }
069
070    /**
071     * Initializes the model from preferences.
072     * @param prefEntry preference key
073     */
074    public void loadPrefs(String prefEntry) {
075        List<FilterPreferenceEntry> entries = StructUtils.getListOfStructs(
076                Config.getPref(), prefEntry, null, FilterPreferenceEntry.class);
077        if (entries != null) {
078            for (FilterPreferenceEntry e : entries) {
079                filters.add(new Filter(e));
080            }
081            updateFilterMatcher();
082        }
083    }
084
085    /**
086     * Saves the model to preferences.
087     * @param prefEntry preferences key
088     */
089    public void savePrefs(String prefEntry) {
090        Collection<FilterPreferenceEntry> entries = new ArrayList<>();
091        for (Filter flt : filters) {
092            entries.add(flt.getPreferenceEntry());
093        }
094        StructUtils.putListOfStructs(Config.getPref(), prefEntry, entries, FilterPreferenceEntry.class);
095    }
096
097    /**
098     * Runs the filters on the current edit data set.
099     */
100    public void executeFilters() {
101        DataSet ds = OsmDataManager.getInstance().getActiveDataSet();
102        changed = false;
103        if (ds == null) {
104            disabledAndHiddenCount = 0;
105            disabledCount = 0;
106            changed = true;
107        } else {
108            final Collection<OsmPrimitive> deselect = new HashSet<>();
109
110            ds.beginUpdate();
111            try {
112
113                final Collection<OsmPrimitive> all = ds.allNonDeletedCompletePrimitives();
114
115                changed = FilterWorker.executeFilters(all, filterMatcher);
116
117                disabledCount = 0;
118                disabledAndHiddenCount = 0;
119                // collect disabled and selected the primitives
120                for (OsmPrimitive osm : all) {
121                    if (osm.isDisabled()) {
122                        disabledCount++;
123                        if (osm.isSelected()) {
124                            deselect.add(osm);
125                        }
126                        if (osm.isDisabledAndHidden()) {
127                            disabledAndHiddenCount++;
128                        }
129                    }
130                }
131                disabledCount -= disabledAndHiddenCount;
132            } finally {
133                if (changed) {
134                    ds.fireFilterChanged();
135                }
136                ds.endUpdate();
137            }
138
139            if (!deselect.isEmpty()) {
140                ds.clearSelection(deselect);
141            }
142        }
143        if (changed) {
144            updateMap();
145        }
146    }
147
148    /**
149     * Runs the filter on a list of primitives that are part of the edit data set.
150     * @param primitives The primitives
151     */
152    public void executeFilters(Collection<? extends OsmPrimitive> primitives) {
153        DataSet ds = OsmDataManager.getInstance().getActiveDataSet();
154        if (ds == null)
155            return;
156
157        changed = false;
158        List<OsmPrimitive> deselect = new ArrayList<>();
159
160        ds.beginUpdate();
161        try {
162            for (int i = 0; i < 2; i++) {
163                for (OsmPrimitive primitive: primitives) {
164
165                    if (i == 0 && primitive instanceof Node) {
166                        continue;
167                    }
168
169                    if (i == 1 && !(primitive instanceof Node)) {
170                        continue;
171                    }
172
173                    if (primitive.isDisabled()) {
174                        disabledCount--;
175                    }
176                    if (primitive.isDisabledAndHidden()) {
177                        disabledAndHiddenCount--;
178                    }
179                    changed |= FilterWorker.executeFilters(primitive, filterMatcher);
180                    if (primitive.isDisabled()) {
181                        disabledCount++;
182                    }
183                    if (primitive.isDisabledAndHidden()) {
184                        disabledAndHiddenCount++;
185                    }
186
187                    if (primitive.isSelected() && primitive.isDisabled()) {
188                        deselect.add(primitive);
189                    }
190                }
191            }
192        } finally {
193            ds.endUpdate();
194        }
195
196        if (!deselect.isEmpty()) {
197            ds.clearSelection(deselect);
198        }
199        if (changed) {
200            updateMap();
201        }
202    }
203
204    private static void updateMap() {
205        MainApplication.getLayerManager().invalidateEditLayer();
206    }
207
208    /**
209     * Clears all filtered flags from all primitives in the dataset
210     */
211    public void clearFilterFlags() {
212        DataSet ds = OsmDataManager.getInstance().getActiveDataSet();
213        if (ds != null) {
214            FilterWorker.clearFilterFlags(ds.allPrimitives());
215        }
216        disabledCount = 0;
217        disabledAndHiddenCount = 0;
218    }
219
220    /**
221     * Removes all filters from this model.
222     */
223    public void clearFilters() {
224        filters.clear();
225        updateFilterMatcher();
226    }
227
228    /**
229     * Adds a new filter to the filter list.
230     * @param filter The new filter
231     * @return true (as specified by {@link Collection#add})
232     */
233    public boolean addFilter(Filter filter) {
234        filters.add(filter);
235        updateFilterMatcher();
236        return true;
237    }
238
239    /**
240     * Moves the filters in the given rows by a number of positions.
241     * @param delta negative or positive increment
242     * @param rowIndexes The filter rows
243     * @return true if the filters have been moved down
244     * @since 15226
245     */
246    public boolean moveFilters(int delta, int... rowIndexes) {
247        if (!canMove(delta, filters::size, rowIndexes))
248            return false;
249        doMove(delta, rowIndexes);
250        updateFilterMatcher();
251        return true;
252    }
253
254    /**
255     * Moves down the filter in the given row.
256     * @param rowIndex The filter row
257     * @return true if the filter has been moved down
258     */
259    public boolean moveDownFilter(int rowIndex) {
260        return moveFilters(1, rowIndex);
261    }
262
263    /**
264     * Moves up the filter in the given row
265     * @param rowIndex The filter row
266     * @return true if the filter has been moved up
267     */
268    public boolean moveUpFilter(int rowIndex) {
269        return moveFilters(-1, rowIndex);
270    }
271
272    /**
273     * Removes the filter that is displayed in the given row
274     * @param rowIndex The index of the filter to remove
275     * @return the filter previously at the specified position
276     */
277    public Filter removeFilter(int rowIndex) {
278        Filter result = filters.remove(rowIndex);
279        updateFilterMatcher();
280        return result;
281    }
282
283    @Override
284    public Filter setValue(int rowIndex, Filter filter) {
285        Filter result = filters.set(rowIndex, filter);
286        updateFilterMatcher();
287        return result;
288    }
289
290    @Override
291    public Filter getValue(int rowIndex) {
292        return filters.get(rowIndex);
293    }
294
295    /**
296     * Draws a text on the map display that indicates that filters are active.
297     * @param g The graphics to draw that text on.
298     * @param lblOSD On Screen Display label
299     * @param header The title to display at the beginning of OSD
300     * @param footer The message to display at the bottom of OSD. Must end by {@code </html>}
301     */
302    public void drawOSDText(Graphics2D g, OSDLabel lblOSD, String header, String footer) {
303        if (disabledCount == 0 && disabledAndHiddenCount == 0)
304            return;
305
306        String message = "<html>" + header;
307
308        if (disabledAndHiddenCount != 0) {
309            /* for correct i18n of plural forms - see #9110 */
310            message += trn("<p><b>{0}</b> object hidden", "<p><b>{0}</b> objects hidden", disabledAndHiddenCount, disabledAndHiddenCount);
311        }
312
313        if (disabledAndHiddenCount != 0 && disabledCount != 0) {
314            message += "<br>";
315        }
316
317        if (disabledCount != 0) {
318            /* for correct i18n of plural forms - see #9110 */
319            message += trn("<b>{0}</b> object disabled", "<b>{0}</b> objects disabled", disabledCount, disabledCount);
320        }
321
322        message += footer;
323
324        lblOSD.setText(message);
325        lblOSD.setSize(lblOSD.getPreferredSize());
326
327        int dx = MainApplication.getMap().mapView.getWidth() - lblOSD.getPreferredSize().width - 15;
328        int dy = 15;
329        g.translate(dx, dy);
330        lblOSD.paintComponent(g);
331        g.translate(-dx, -dy);
332    }
333
334    /**
335     * Returns the list of filters.
336     * @return the list of filters
337     */
338    public List<Filter> getFilters() {
339        return new ArrayList<>(filters);
340    }
341
342    /**
343     * Returns the number of filters.
344     * @return the number of filters
345     */
346    public int getFiltersCount() {
347        return filters.size();
348    }
349
350    /**
351     * Returns the number of primitives that are disabled but not hidden.
352     * @return the number of primitives that are disabled but not hidden
353     */
354    public int getDisabledCount() {
355        return disabledCount;
356    }
357
358    /**
359     * Returns the number of primitives that are disabled and hidden.
360     * @return the number of primitives that are disabled and hidden
361     */
362    public int getDisabledAndHiddenCount() {
363        return disabledAndHiddenCount;
364    }
365
366    /**
367     * Determines if the filter state (normal / disabled / hidden) of any primitive has changed in the process.
368     * @return true, if the filter state (normal / disabled / hidden) of any primitive has changed in the process
369     */
370    public boolean isChanged() {
371        return changed;
372    }
373
374    /**
375     * Determines if at least one filter is enabled.
376     * @return {@code true} if at least one filter is enabled
377     * @since 14206
378     */
379    public boolean hasFilters() {
380        return filterMatcher.hasFilters();
381    }
382
383    /**
384     * Returns the list of primitives whose filtering can be affected by change in primitive
385     * @param primitives list of primitives to check
386     * @return List of primitives whose filtering can be affected by change in source primitives
387     */
388    public static Collection<OsmPrimitive> getAffectedPrimitives(Collection<? extends OsmPrimitive> primitives) {
389        // Filters can use nested parent/child expression so complete tree is necessary
390        Set<OsmPrimitive> result = new HashSet<>();
391        Stack<OsmPrimitive> stack = new Stack<>();
392        stack.addAll(primitives);
393
394        while (!stack.isEmpty()) {
395            OsmPrimitive p = stack.pop();
396
397            if (result.contains(p)) {
398                continue;
399            }
400
401            result.add(p);
402
403            if (p instanceof Way) {
404                for (OsmPrimitive n: ((Way) p).getNodes()) {
405                    stack.push(n);
406                }
407            } else if (p instanceof Relation) {
408                for (RelationMember rm: ((Relation) p).getMembers()) {
409                    stack.push(rm.getMember());
410                }
411            }
412
413            for (OsmPrimitive ref: p.getReferrers()) {
414                stack.push(ref);
415            }
416        }
417
418        return result;
419    }
420
421    @Override
422    public void sort() {
423        Collections.sort(filters);
424        updateFilterMatcher();
425    }
426
427    @Override
428    public void reverse() {
429        Collections.reverse(filters);
430        updateFilterMatcher();
431    }
432}