Class UndoableEditAbstract

A significant edit is worthy to be saved and to be displayed to the user as undoable. A typical insignificant edit would be if two edits got merged into one, ending up with the original. Another example is when selection changes have been done, which don't change the data.

Returns

true if the edit was significant

Try to merge a new edit into an existing one. This can be used to merge smaller edits into larger edits. For example a text editor can merge multiple changes into one, rather than having one edit per character change.

Returns

true if the edit was merged, false otherwise

This action re-applies the changes of the edit.

Try to replace an existing edit with a new one

Returns

true if this edit should be replaced with the new one, false otherwise

This action reverts the changes of the edit.