Changeset 16598 in josm for trunk/src/org

Timestamp:

2020-06-11T11:32:23+02:00 (4 years ago)

Author:

simon04

Message:

see #19369 - PropertiesDialog: avoid re-creating national TaginfoActions on every selection change

File:

• trunk/src/org/openstreetmap/josm/gui/dialogs/properties/PropertiesDialog.java (modified) (3 diffs)

trunk/src/org/openstreetmap/josm/gui/dialogs/properties/PropertiesDialog.java

@@ -116 +116 @@
 import org.openstreetmap.josm.tools.Logging;
 import org.openstreetmap.josm.tools.Shortcut;
+import org.openstreetmap.josm.tools.TaginfoRegionalInstance;
 import org.openstreetmap.josm.tools.Territories;
 import org.openstreetmap.josm.tools.Utils;
@@ -197 +198 @@
     private final TaginfoAction tagHistoryAction = taginfoAction.toTagHistoryAction();
     private final Collection<TaginfoAction> taginfoNationalActions = new ArrayList<>();
+    private transient int taginfoNationalHash;
     private final PasteValueAction pasteValueAction = new PasteValueAction();
     private final CopyValueAction copyValueAction = new CopyValueAction(
@@ -371 +373 @@
 
     private void setupTaginfoNationalActions(Collection<? extends IPrimitive> newSel) {
+        if (newSel.isEmpty()) {
+            return;
+        }
+        final LatLon center = newSel.iterator().next().getBBox().getCenter();
+        List<TaginfoRegionalInstance> regionalInstances = Territories.getRegionalTaginfoUrls(center);
+        int newHashCode = regionalInstances.hashCode();
+        if (newHashCode == taginfoNationalHash) {
+            // taginfoNationalActions are still valid
+            return;
+        }
+        taginfoNationalHash = newHashCode;
         destroyTaginfoNationalActions();
-        if (!newSel.isEmpty()) {
-            final LatLon center = newSel.iterator().next().getBBox().getCenter();
-            Territories.getRegionalTaginfoUrls(center).stream()
-                    .map(taginfo -> taginfoAction.withTaginfoUrl(tr("Go to Taginfo ({0})", taginfo.toString()), taginfo.getUrl())
-                    ).forEach(taginfoNationalActions::add);
-            taginfoNationalActions.stream().map(membershipMenu::add).forEach(membershipMenuTagInfoNatItems::add);
-            taginfoNationalActions.stream().map(tagMenu::add).forEach(tagMenuTagInfoNatItems::add);
-        }
+        regionalInstances.stream()
+                .map(taginfo -> taginfoAction.withTaginfoUrl(tr("Go to Taginfo ({0})", taginfo.toString()), taginfo.getUrl()))
+                .forEach(taginfoNationalActions::add);
+        taginfoNationalActions.stream().map(membershipMenu::add).forEach(membershipMenuTagInfoNatItems::add);
+        taginfoNationalActions.stream().map(tagMenu::add).forEach(tagMenuTagInfoNatItems::add);
     }