Cursor

Current cursors is moving over screen lines. So you can start type
anywhere like after end of wrapped line.
As I wrote I thought about convert cursor into view line coordinates,
but this would forbiden this. I think this is not intended bahaviour anyway.
However stoping on start of view line is needed to navigate over file.
Navigation thru screen (wrapped) line may be needed too (without editing?).

Note cursor using View coordinates is needed to work with wrap lines.
otherwise lot jumping, unexpected moving and other things happen.
I thought also about using both coordines in paralel but I was not able
to solve it make it to work for all cases.

In current implementation. you can start writing at ANY line.
I'm not sure if this is good practice however. Empty line you can
convert by this way into regular line may be line after original file
thus new line is missing in previous line.
Also line gets EOL if don't have any yet. I would preffer to don't add
EOL - there is no reason to have it on last line in some cases (formats).
So final solution is:
  * Don't add EOL except it is not last line and is converted from EMPTY.
  * make sure previous non empty line have EOL (if actual one was EMPTY)

Note that you can edit even deleted line(DIFFSTATE_REMOVED), conflicted
and even colapsed too.

If there is nobody against this I would change that.

-- 
Oto BREZINA, Printflow s.r.o., EU
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