This testcase needs to be run locally (it's using enablePrivilege). This getScrollbarVisibility is allways returning true/true for me, no matter if the scrollbars are visible or not. Afaik, it should tell me if the horizontal/vertical scrollbars on the page are visible or not. This is what Boris had to say about it on IRC: bz {#developers} mw22: I get true and false for horizontal/vertical bz {#developers} mw22: with no scrollbars showing bz {#developers} mw22: hmm bz {#developers} mw22: file a bug, cc roc? ;) bz {#developers} mw22: something is weird here.

Well, there's no mystery about this one. It's not really implemented :-) http://lxr.mozilla.org/mozilla/source/view/src/nsScrollPortView.cpp#331

Simple stuff ...

Comment on attachment 186439 [details] [diff] [review] fix implements a DOM API. No risk to anyone not using the API, and since it currently doesn't work at all, no risk there either.

checked in. Note that the testcase has "v" and "h" flipped, because for some reason the docshell API takes the vertical status first. But that's the way it's documented...

should view/public/nsIScrollableView.h get a new IID?

(In reply to comment #5) > checked in. Note that the testcase has "v" and "h" flipped, Oops! I didn't see that. I'm kind of used that horizontal comes first. Thanks for the patch, Robert! I can use this for bug 212002 for instance.

(In reply to comment #6) > should view/public/nsIScrollableView.h get a new IID? Yeah, I guess.

I cleaned up many scrollbar-API-related things in bug 72747, but I missed this one.