From: Jim Wilson 
@Date: Wed, 22 Jan 2003 18:49:40 -0500
@Sender: semware-owner{at}sawasdi.apana.org.au



At 02:41 PM 1/22/03 -0500, you wrote:
>How does this sound:
>
>Allocate a 32-bit integer (called line_change_count) for
>each line.
>
>Whenever that line is changed, increment line_change_count.
>This should be done in the same code that builds the undo
>list.
>
>Whenever undo is performed, decrement the line_change_count
>as appropriate.
>
>Whenever redo is performed, increment line_change_count as
>appropriate.

Sounds like a good idea, but what about file saves? Can you also add 
options that will:

  - remove the line changed "flag" so it can be re-colored as though it 
wasn't changed
  - leave the line changed "flag" intact so it stays colored as though it 
was changed, even after saving the file

This way, if someone wanted to consider a changed line no longer changed 
when a file is saved (like me) it can be done.

>(I'm assuming that no one will ever make 2**32 changes to a
>single line?  I wonder how long it would take to make that
>many simple changes to a single line?)

I don't know, I've seen some pretty crappy typists in my day...  :-)

Jim 

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