[Enigmail] Extension to avoid signing on certain mails

[Marius Storm-Olsen]

Hi guys,

I'm working on an extension which will send a certain type
of mails, which should never be signed. However, I'm
struggling with getting the .js code right to turn off the
PGP signing.

Right now I have something like
    window.addEventListener('compose-send-message', checkSigning, true);

where 
    checkSigning: function() {
        var signing_on = false;
        try {
            if (document.getElementById("enigmail_signed_send").getBoolAttribute("checked")) {
                enigSetSendMode('toggle-sign');
            }
        } catch (e) {}
    },

as I couldn't see any particular way for other extensions
to query the signing state, and setting it. However, the
code above fails miserably. Any input on how I can
correctly handle this?

My configuration is
  extensions.enigmail.confirmBeforeSend = false
  extensions.enigmail.disableSMIMEui    = false
  extensions.enigmail.displaySignWarn   = false
  mail.identity.id1.pgpSignPlain        = true

and I want my extension to only automatically turn off
the signing for *this particular mail type*, even if
my mail.identity says that I'm supposed to be signing
them.

Thanks for any input!

--
.marius