Error Recovery

All programs crash, and new programs (like this one) crash a lot.

Every minute or so PfaEdit looks around and sees if anything has changed since the last time it checked. If it finds a font that has had changes, it will save a small file in its private directory (~/.PfaEdit/autosave) which consists of all changed characters in the changed font.

When PfaEdit starts up it checks this directory, and if it finds anything there it attempts to apply those changes to the original font. So if PfaEdit crashes, or if your machine crashes, the next time you start PfaEdit it will figure out what you were doing and recover it as best it can.

When editing CID-keyed fonts there are a few potential gotchas:

• PfaEdit does not keep track of gross changes (like adding or removing a sub font)
• PfaEdit does not keep track of which sub font a change occurred in, instead at recovery time it will look for a subfont that is contains a character at the CID that was changed. In almost all cases this will be right, but if you add characters or if you have two sub-fonts defining the same CID, PfaEdit may guess wrong.

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