1477403 - Attach position:fixed elements to the visual viewport if it's larger than the layout viewport (at the current zoom level)

Status: RESOLVED DUPLICATE of bug 1465616

(Core :: Panning and Zooming, enhancement)

Description

[Botond Ballo [:botond]]

See bug 1473699 comment 2 for why we want to do this.

Comment 1

[Tanushree Podder [:tanushree]]

Attachment: Sizing fixed position elements according to the larger of visual viewport and layout viewport

This patch sizes fixed position elements based on the larger of the visual viewport and the layout viewport. However, it positions fixed position elements based on the layout viewport. The next step for this bug will be to position fixed position elements according to the larger of the layout viewport and visual viewport.

Comment 3

[Botond Ballo [:botond]]

Just to provide some context here: we decided to fold the patch here into bug 1465616, because the intermediate state between those patches and this one (where fixed elements are always attached to the layout viewport) didn't really make sense to land separately.