46669 - Loading frameset causes previous page's content to move before disappearing

Status: VERIFIED DUPLICATE of bug 34283

(Core :: Layout: Images, Video, and HTML Frames, defect, P3)

Description

[Randell Jesup [:jesup] (needinfo me)]

To re-create (preferably on a slower machine):  Go to mozilla.org.  Go to
www.gopconvention.org (or other page with frames, especially along the left
edge.)  Note that for a second the previous page's content all moves to the
right before being erased.

Visually, this is quite unappealing.  It also may give some problems due to
extra bandwidth use when the display is not local to the browser.  Also, it
really shouldn't be being done - the page should be cleared before the new page
starts to render it's frameset.  I.e. a frameset should clear it's window, not
just count on the frames to clear their portion of the window (which I'm
guessing is what is happening).

Comment 1

[uamjet602]

I'd guess the frames objects are copies of the object showing the main page
(still containing the last page viewed). As they are created, and repainted,
they still show that page until they are properly initialised with the wanted
page. Perhaps a clean frame should be kept in memory to copy the new frame
objects from.

Comment 2

[Randell Jesup [:jesup] (needinfo me)]

That sounds correct, and it sounds like a reasonable solution (clean frame
object) if there isn't a way to simply create one (I'm guessing you're correct
and it's being dup'ed from the current frame object).

This might be related to bug 46646.

Comment 3

[Gervase Markham [:gerv]]

Confirming for evaluation.

Gerv

Comment 4

[Kevin McCluskey (gone)]

*** This bug has been marked as a duplicate of 34283 ***

Comment 5

[Chris Petersen]

Marking verified dup of 34283.