From: julio@diegidio.name   
      
   On Tuesday, 5 April 2022 at 03:25:43 UTC+2, Ben Bacarisse wrote:   
      
   > This is just a random observation that might trigger something useful in    
   > more complex situations...    
   >    
   > Emacs has what I find to be a very useful refinement of undo/redo: it    
   > can be limited to a region of the text.   
      
   Maybe worth noticing in this context (see the original question) is that those   
   are already applicative details: a generic undo/redo engine just handles   
   opaque path/value pairs, what's encoded in those paths and values is   
   application specific.  Then of    
   course one might think of abstracting a little bit on the cases for the paths   
   and values in various scenarios (from a text editor to a database manager to a   
   designer and what not: whether they have something in common), but this would   
   be a different and    
   further layer of abstraction, and I haven't yet thought about it at all, but   
   my guess is that this isn't worth it, as there isn't much here in terms of   
   actual generality and shared logic.  That's also an example of what in real   
   production rather comes    
   out incrementally, as long as the architecture is at every step rational...   
      
   Julio   
      
   --- SoupGate-Win32 v1.05   
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