Implementing UNDO

[Klaus major-k]

Hi Brian,

> Am 21.05.2021 um 16:25 schrieb Brian Milby via use-livecode <use-livecode at lists.runrev.com>:
> 
> For text, the method will depend on the size of the text.  In general, implement an undo stack and a redo stack.  For single line fields it could simply be a list for each.  After each change, add entry to undo list and clear redo list.  When doing undo, move entries to redo list allowing forward/backward movement between changes.
> 
> For longer text, an array based stack could be used.  Either store the full text or use the diff library - method will depend on size of text.

thank you, very helpful!


Best

Klaus
--
Klaus Major
https://www.major-k.de
https://www.major-k.de/bass
klaus at major-k.de