793007 - Baseline of an empty -moz-box is incorrect. (top of content-box, instead of bottom of margin-box)

Status: RESOLVED WONTFIX

(Core :: Layout, defect)

Description

[Daniel Holbert [:dholbert]]

Attachment: testcase 1

STR:
 1. Load attached testcase.  Examine the blue -moz-box elements.

ACTUAL RESULTS:
In the top half, the blue -moz-box aligns the top of its content-box with the baseline of the text next to it.  That is to say -- its baseline is the top of its content-box.

EXPECTED RESULTS:
The blue -moz-box should align the _bottom_ of its margin-box with the baseline of the text next to it. (It should use its bottom as its baseline)

This is only a problem for empty "-moz-box" elements. If it has some text in it, then we successfully align it at the text's baseline.

Relevant spec text:
  # If an atomic inline (such as an inline-block, inline-table, or replaced
  # inline element) is not capable of providing its own baseline information,
  # then the UA synthesizes a baseline table thus:
  #  * alphabetic
  #      The alphabetic baseline is assumed to be at the under margin edge.
http://www.w3.org/TR/css3-writing-modes/#replaced-baselines

Comment 1

[Daniel Holbert [:dholbert]]

(Unsurprisingly, -moz-inline-box also suffers from this bug.)

Comment 2

[Ting-Yu Lin [:TYLin] (PDT, UTC-7)]

I'm inclined to close this as WONTFIX because we removed the support of display: -moz-box in bug 1477553.