How can mode of form detail page be detected: "edit" or "view"

> Is it possible to determine the mode that a form detail page is in from
> within the form definition file?
>
> It looks like there are three modes:  "new", "edit", and "view".
>
> I have some custom buttons, so I cannot use the
> oxf.fr.detail.buttons.view.*.* or oxf.fr.detail.buttons.*.* properties to
> configure the workflow-review and the workflow-edit buttons so they must be
> included in my form definition like so:
>
> <fr:buttons>
>    <fr:button [custom button definition]
>    </fr:button>
>    <fr:save-locally-button/>
>    <fr:workflow-edit-button/>
>    <fr:workflow-review-button/>
>    <fr:pdf-button/>
>    <fr:close-button/>
> </fr:buttons>
>
> However, they both show up in all modes: "new", "edit", and "view" and so
> one or the other is always redundant clutter.
>
> I would like to conditionally display only the necessary buttons depending
> on what mode the form is in, so I first need to be able to determine what
> mode the form is in. Can this be done from within the form definition?
>
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>
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