Github user mcgilman commented on the issue:
https://github.com/apache/nifi/pull/1546
Hey @scottyaslan,
This is a great start, but I think there are a few fundamental issues with
how `PropertyDescriptors` relay what sort of editor should be used. There does
not appear to be a cross-browser support for masking `textareas` (multi-line
input). There exists sensitive properties that currently expect the field to
support multi-line input. The `input[type=password]` only supports a single
line.
I think we would need to introduce a new attribute of `PropetyDescriptor`
which would drive whether or not to use a masked single line input or the
existing multi-line `textarea`. The existing multi-line `textareas` support
sensitive by not returning/showing the value once set. We would not be able to
support a `PropertyDescriptor` that requires masking and multi-line input.
Additional complications exist for sensitive properties that support
expression language. We'd have to spend some time to determine if `CodeMirror`
supports masking or if it's possible to introduce that sort of capability. If
not, we would not be able to support a `PropertyDescriptor` that requires
masking and supports expression language.
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