676168 - <richlistbox> only supports one <listheader>

Status: NEW

(Core :: XUL, defect)

Description

[Ben Bucksch (:BenB)]

Reproduction:
<richlistbox>
  <listhead>
    <listheader label="Foo"/>
    <listheader label="Bar"/>
  </listhead>
  <richlistitem ...> (20 times, to cause scrolling)
</richlistbox>

Actual result:
The list header scrolls away

Expected result:
The list header should be fixed at the top.

Workaround 1:
<richlistbox>
  <listheader equalsize="always" style="border: 0; padding: 0; -moz-appearance:
none;">
    <treecol label="Foo"/>
    <treecol label="Bar"/>
  </listheader>
  <richlistitem ...>
</richlistbox>

This has almost the right layout, also on Linux GTK (where the style is needed, otherwise you get a header inside a header), BUT the markup is semantically completely wrong: 1) it's using a cell element as a row element 2) using a tree element in a listbox.

Comment 1

[Firefox Bug Husbandry Bot]

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