38131 - fixed-positioned elements drawn over gfx scrollbars

Status: VERIFIED DUPLICATE of bug 5195

(Core :: XUL, defect, P3)

Description

[Jesse Ruderman]

(noticed while trying to reproduce bug 38022)

1. Load http://hurddocs.sourceforge.net/
2. Try scrolling to bottom of page
3. Notice that the scrollbar gets cut off by the div at the bottom.

Expected results: I'm not sure what's supposed to happen, but I can't imagine 
that it's correct for the scrollbar to be cut off.

Comment 1

[Jesse Ruderman]

Attachment: somewhat simplified

Comment 2

[Jesse Ruderman]

note that removing the background-color style *seems* to fix the problem, but 
doesn't really because the any part of the scrollbar thumb (draggable part) 
becomes invisible when it is dragged over the div area.

Comment 3

[Jesse Ruderman]

oh, just regarding that last comment, looks like a drawing problem because alt-
tabbing to mozilla and back makes that part of the scrollbar thumb draw.

Comment 4

[Pierre Saslawsky]

Reassigned to Layout.

Comment 5

[Jesse Ruderman]

*** Bug 38609 has been marked as a duplicate of this bug. ***

Comment 6

[Pierre Saslawsky]

The problem doesn't happen with native scrollbars: reassigned to xptoolkit.

Comment 7

[Jesse Ruderman]

Oops, sorry for goofing on the summary.

Comment 8

[John Morrison]

The css property 'right:' is interpreted as :
  1) relative to the left hand margin of the vertical scrollbar when 
     using NATIVE scrollbars
  2) relative to the right hand edge of the window (viewport) when 
     using GFX scrollbars

Comment 9

[John Morrison]

Attachment: testcase; 'right:0' is relative to what (gfx vs. native)

Comment 10

[John Morrison]

-> evaughan for gfx scrollbars && css position:

Comment 11

[Peter Trudelle]

*** This bug has been marked as a duplicate of 5195 ***

Comment 12

[John Morrison]

verified dup (although bug #5195 is broader in scope -- it addresses some
z-order issues for both gfx and native scrollbars, and less so notes the 
coordinate system issue (what is 'right:0px' w.r.t. GFX scrollbars)).