786975 - Tooltips not positioned properly when using openPopup on OSX & Windows

Status: RESOLVED INVALID

(Core :: XUL, defect)

Description

[Mike Ratcliffe [:miker] [:mratcliffe] [:mikeratcliffe]]

Take the following test case:
const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
let tooltip = document.createElementNS(XUL_NS, "tooltip");
document.documentElement.appendChild(tooltip);
tooltip.label = "Some text";
tooltip.openPopup(someElement, "before_start", 0, 0, false, false, null);

The tooltip opens vertically too low on OSX and Windows although it is fine on Linux.

Comment 1

[Neil Deakin]

Tooltips have a 21 pixel top margin so as not to obstruct the mouse pointer they normally appear next to. You can override the margin if you are opening one manually.

Comment 2

[Mike Ratcliffe [:miker] [:mratcliffe] [:mikeratcliffe]]

If this is by design then we should leave it.

Comment 3

[Firefox Bug Husbandry Bot]

Moving to Core:XUL per https://bugzilla.mozilla.org/show_bug.cgi?id=1455336