#2763: Undo/Redo system porting from v2
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Reporter: garry.yao | Owner: fredck
Type: New Feature | Status: assigned
Priority: Normal | Milestone: CKEditor 3.0
Component: General | Version:
Keywords: Confirmed Review- |
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Comment(by garry.yao):
Fred, the updated patch should has better performance due to the new
bookmark system you adapted, and I also see the code quality improvement,
it's a good example for me.
Here, I just provide some of my opinions toward the logic details when
performing the undo/redo, since I found in your patch many changes toward
this part, some of which were those I introduced in my old patch to
slightly distinguish the behaviors from v2 codes:
1. Either undo or redo only take care document modification along with
selection changes, which mean stand-alone selection changes should not be
recorded.
1. Undo record the snapshot right before a command, while redo record
the snapshot right after it, both of themselves need not participant in
snapshots.
1. Due-stacks mechanism was introduce for easy accessing snapshots
according to the same history index, though it could be combined, but is
mistakable and complex during the navigation.
--
Ticket URL: <http://dev.fckeditor.net/ticket/2763#comment:13>
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