This commit adds two helper methods to layout.Contraints that make it easier to
manipulate the constraints while keeping their invariants. In particular, code
manually manipulating constraints usually fails to correctly ensure that the
max does not become smaller than the min, the min does not exceed the max, and
that no value goes below zero.
It's quite a few lines to check these invariants yourself in every custom layout,
so I think it makes sense to offer helpers for this.
Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>
While here, unexport the Queue and Config fields. The NewContext
cosntructor is shorter, and there is no reason to expose the fields
to accidental mutation.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
With Context containing all the necessary information, separate
Init methods no longer makes much sense. Delete them and thereby
remove a source of runtime panics.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Taking a constraint in Reset smells too much of a layout operation,
whereas a size is simpler and only serves to set the context constraints
to something sensible.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Package ui is now only about units except for the Config.Now method.
Remove Now and rename Config to Converter. Add layout.Config to
replace the old ui.Config.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
