display attachements inline

[honsberg]

Feature request:
after opening an message with winmail.dat and lookout decoding it, display the attachements (images, html) inline in message body.

[dugite-code]

Might be able to get this working after I re-architecture the add-on. I'll need to do some research into better ways of handling the attachments.

[dugite-code]

Dev Notes

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• Attachments are not *real* they are virtual place-holders.
• Attachments are currently processed asynchronously changes in attachment-rework branch breaks that (?) Could cause performance issues.
• Temporary files and attachment names don't match. Need some message unique subfolder in temporary directory.
• Message view re-load to allow inline view need to be researched.
• Calendar direct access breaks because custom save/open functions are currently disabled.
• rescue conflicting alternatives might be an example of how to go about this. Re-build the message and replace it inline

[dugite-code]

I did ask for advice on the Thunderbird discourse, however I have yet to receive any feedback. https://discourse.mozilla.org/t/update-inline-attachments-view/31671

Additional Notes:

This looks like the image inline attachment logic in source:
https://dxr.mozilla.org/comm-central/source/comm/suite/mailnews/msgHdrViewOverlay.js?q=msgHdrViewOverlay.js&redirect_type=direct#613