[whatwg] Fixing undo on the Web - UndoManager and Transaction
ian at hixie.ch
Thu Aug 25 16:06:51 PDT 2011
On Tue, 26 Jul 2011, Ryosuke Niwa wrote:
> In the last couple of weeks, I've been working with developers of
> CKEditor, TinyMCE, and Google Docs to come up with *new API for undo and
I've removed the old UndoManager API from the HTML spec since your
proposal seems far more thought out!
Here are some quick comments on it:
- The Transaction interface should be named something less generic, e.g.
UndoTransaction or something.
- "must return the object implementing the UndoManager interface" should
probably clarify _which_ object. There's presumably more than one
object in the world implementing this interface. :-)
- We need to figure out how UndoManager objects affect the bfcache and
the document "salvageable" flag. Please ping me on IRC about this.
- What's the story with window.onundo and window.onredo? Should they be
In removing the UndoManager stuff I discovered that actually there was
nothing other than the editing stuff that referred to it, so once I've
removed the editing stuff there won't be a direct reference from the HTML
spec to the undo/redo spec. Presumably Aryeh's editing spec will reference
it, though? Looks like right now the 'undo' and 'redo' execCommand()s are
undefined. I presume that most of the execCommand()s are going to end up
defined as undo transactions, is that right?
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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