Event handler modifiers mix levels of abstractions

[sdegueldre]

Some modifiers (.stop, .prevent, .self) are handled in the runtime, some of them are handled in blockdom (.synthetic, .capture), making it non-obvious where implementing extra modifiers should go.

[ged-odoo]

you can argue that it shield the user from an implementation detail :). But concretely, do you have a suggestion on what we should do?

[sdegueldre]

It's a very minor thing so not sure if anything needs doing but we could:

• implement event handler management entirely outside the blockdom layer if blockdom provides callback refs to its users
• implement all modifiers directly in blockdom
• have blockdom accept configuration for user-defined modifiers
• have different syntax for blockdom modifiers (that modify the handler at definition) and for userland modifiers (that modify handler behavior at invocation)
• simply document the fact that modifiers are implemented in two different places for technical reasons at both implementation sites