[PATCH] Numbered Backups

[Achim Bohnet]

On Tuesday 17 January 2006 19:27, Tom Albers wrote:
> Op dinsdag 17 januari 2006 00:37, schreef Allen Winter:
> > Hi,
> >
> > Attached is a patch that provides numbered backups (eg. fred.~1~, fred.~2~,
> > ..., fred.~N~, where N is limited, default=10) in the KSaveFile class.  It
> > also renames the current backupFile() method to simpleBackupFile() and then
> > provides a new backupFile() method that reads the user's global configfile
> > for backup file parameters: the backup type, the backup extension, and the
> > max number of backups.
> >
> > Thus we could extend to other file backup schemes later, if desired.
> >
> > An idea that would compliment this very well, and also provide a very cheap
> > revision control method, is a File->Revert capability which works as our
> > typical file selector dialog, but filters on the backup extension.
> >
> > For example, you are drawing in Krita.  You have 10 numbered backups of
> > that drawing.  You totally screw-up and want to revert back to an older
> > version.   Select File->Revert, and  file selection dialog pop-ups with all
> > 10 backups listed.  If you have preview on, you could click each backup
> > file, preview each drawing, then select which one you'd like to revert to. 
> >  Click <OK>.  Click <Yes> are sure you want to revert?
> >
> > Anyhow, comments appreciated.

I have not seen the patch, so I can't check, but I would like that
the first backup (assumed it's the original) never deleted.  So

	1st:	fred.orig
	2nd:	name.~1~
	3rd:	fred.~2~
	etc

This way one can _always_ go back and start from beginning of the
image manipulation even with a default of 1 (only keep orig version).
for space limited environments.

Achim
> 
> Hi Allen, 
> 
> I can not judge the code, but I know the digiKam team would welcome this 
> addition. It would solve 'Too easy to save images' [1] for us in a KDE way. 
> 
> Some thoughts:
> To save meta-data it would be nice if the host app would know something about 
> this copy. Maybe some signal can do that, not sure.
> 
> It would be nice to be able to differentiate the backup scheme per 
> application.
> 
> It would be nice to be able to add the configuration of the scheme to an 
> application.
> 
> Toma
> 
> [1] http://bugs.kde.org/show_bug.cgi?id=103350
> 

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