The polyfill for file input on WASM now makes use of the supplied
filter list.
Some changes were introduced in the abstraction for filters so that
they are usable both for the new file API and the legacy file input.
Change-Id: Id6341be4d6a1647e17382d13da7be42491cfaf80
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
As a preparatory measure for using showXFilePicker, the Qt file
filter has to be transformed to the format used by the showXFilePicker
(sXFP) options. A class structure reflecting the options was created. Based on
an input in the form of a qt file filter, it will parse the filter to
the sXFP options format. Unit tests were added and the code is not yet
used in non-test env, next change will use it.
Task-number: QTBUG-99611
Change-Id: I277286467a7b5ce6f323c19bdd31740a41b6a6be
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
