allow broken (unclosed) areas to be continued (#9635)

CHANGELOG.md

@@ -39,6 +39,7 @@ _Breaking developer changes, which may affect downstream projects or sites that
 
 #### :sparkles: Usability & Accessibility
 * Also show search result for coordinates in `lon/lat` order in search results ([#10720], thanks [@Deeptanshu-sankhwar])
+* Allow broken (unclosed) areas to be continued ([#9635], thanks [@k-yle])
 #### :scissors: Operations
 * Fix splitting of closed ways (or areas) when two or more split-points are selected
 #### :camera: Street-Level
@@ -59,6 +60,7 @@ _Breaking developer changes, which may affect downstream projects or sites that
 #### :hammer: Development
 
 [#7381]: https://github.com/openstreetmap/iD/issues/7381
+[#9635]: https://github.com/openstreetmap/iD/pull/9635
 [#10003]: https://github.com/openstreetmap/iD/pull/10003
 [#10720]: https://github.com/openstreetmap/iD/issues/10720
 [#10747]: https://github.com/openstreetmap/iD/issues/10747

modules/operations/continue.js

@@ -16,7 +16,8 @@ export function operationContinue(context, selectedIDs) {
 
     function candidateWays() {
         return _vertex ? context.graph().parentWays(_vertex).filter(function(parent) {
-            return parent.geometry(context.graph()) === 'line' &&
+            const geom = parent.geometry(context.graph());
+            return (geom === 'line' || geom === 'area') &&
                 !parent.isClosed() &&
                 parent.affix(_vertex.id) &&
                 (_geometries.line.length === 0 || _geometries.line[0] === parent);