Dynamic file extension for temporary files

[jbuttery]

It would be nice to be able to specify the file extension of Textern's temporary file on the fly (i.e. per editing session). This is so that editors that do auto-configuration based on file extension (for example, syntax highlighting) can do their thing.

The most obvious (well, to me anyway) way to do this is to have a context menu like "It's All Text!", where you can manually pick from a list of file extensions. This would require having a context menu, though, which may or may not be trivial to implement (I've never made an add-on).

Another way to do it would be to have a configuration file where you could pick a file extension automatically based on a regex match of the page URI, HTML element name, CSS id/class, etc. That'd be a pretty cool way to have the hotkey "do the right thing" out of the box in a lot of cases.

Personally, I'd rather have both (but of course I would, users always ask for everything :P) where the hotkey launches with the default and/or pattern-matched file extension, and choosing from the menu explicitly uses that one, overriding the other logic.

[jlebon]

Not too keen on adding a context menu, seeing as a big part of the idea is avoiding the mouse in the first place :). The filename is already named based on the URL of the page, right? Adding some DOM-related naming schemes to make it more specific is doable.