This patch simplifies the nsIDateTimeInputArea interface, implemented by the
datetimebox bindings, to a point that is easier to convert it to dispatch events,
by doing the following:
- hasBadInput() is re-implemented in C++ in nsIDateTimeControlFrame since
C++ needs the return value synchronously.
- SetValueFromPicker() and SetPickerState() are avoided completed since they
are simply called by HTMLInputElement methods exposed to the frame
script. They are avoided by having the frame script access the NAC and call
the nsIDateTimeInputArea methods directly.
- Merge setEditAttribute() and removeEditAttribute() to updateEditAttributes()
which takes no arguments, and have the method access the attribute values by
reading the values from <input>.
This patch is a scaled-down version of the patch proposed in bug 1456833.
The event approach is only usable in UA Widget version of datetimebox because
there is no way to avoid leaking events to the document without Shadow DOM.
Differential Revision: https://phabricator.services.mozilla.com/D9056
00f30f1d00