Quote:
Originally Posted by giddie
Sorry, I was referring more to whether it would always detect that an epub is in fact already a kepub (with spans etc...) and simply send it to the device as-is. Is it safe to rely on its ability to detect that situation as opposed to keeping a copy with the kepub extension in the Calibre library?
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The extended driver checks each internal file for the spans. If there is at least one, then the file is skipped. If none are change, then the whole file is assumed to be a kepub and sent as such.
It wouldn't be hard to fool the extended driver by adding one span with the appropriate class. But, overall, it should be safe.