XBL components: native support for itemsets

[ebruchez]

• add an itemset mode
• itemset can be provided from the outside, like for built-in selection controls
• itemset can also be provided from the inside
  • tentatively, this would be placed within a local model, requiring #1520
  • if so, need way to point to itemset by id (xxbl:itemsetid="my-itemset"?)
  • could also be placed directly under xbl:binding possibly, like handlers
  • if so, no need to refer by id
• xxf:itemset() must then work when applied to the binding

Historical: see also Thoughts about XBL.next.

[avernet]

+1 from community

[ebruchez]

Note that since Orbeon Forms 4.8 (and 4.7.1), xxf:itemset() works with some XBL components at least, see #1856. And so it should work with databound-select1.xbl as well.

[avernet]

@ebruchez What is the status on this one? Does xxf:itemset() indeed work with some XBL components, as stated in the previous comment? What is the mechanism? I can't find documentation for this either in our XBL doc or the doc for xxf:itemset().

[ebruchez]

@avernet Yes it works with some components, namely if the target control is an XBL component, it looks for the first nested control with an itemset and returns that itemset.

[avernet]

@ebruchez OK. Should we document this behavior, and close this issue? Or do you have something else in mind?

[ebruchez]

Since it was kind of a hack, I am not sure we should document it. Or if we do, maybe document as "works with such and such specific components too".

[ebruchez]

We do have a selection (not itemset) mode since Orbeon Forms 2018.1 (#2428). This only marks the control but doesn't add any functionality at this point.

[ebruchez]

See also #4042.

[avernet]

+1 from user

[avernet]

+1 from customer

[avernet]

+1 from customer

[avernet]

+1 from customer

[avernet]

I created #6444 for the specific case of the Dynamic dropdown with search (databound-select1-search.xbl).