id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
23744	Let actions download parents when JOSM cannot be sure if they are completely known	GerdP	team	"Since r19078 we have a new flag `isReferrersDownloaded` which is used the check if parents are fully downloaded. Before we used the (problematic) test whether a node is inside a download area. 
With this flag we should now implement an automatic download of parent objects whereever actions need this to make sure that no parent object is corrupted, esp. ""Split ..."", ""Combine ..."" and ""Join ..."" actions need this.
With the old code OSM data loaded from file was considered ""complete"" when the file contained one or more ""bounds"" and the data was within those bounds. Since r19078 no such assumptions are made reg. the flag `isReferrersDownloaded`. 

With the new flag I see two possible enhancements:
1) Add a new button ""Download now"" to the existing dialog which warns about missing parents.
2) Add a new preference `auto-download.parents` and - if true - let all actions download the needed parents for objects  where `isReferrersDownloaded`.

Maybe a mixture of both."	enhancement	new	normal		Core