607548 - Empty line consisting of an empty text node immediately followed by a block element has an incorrect top position

Status: NEW

(Core :: Layout, defect)

Description

[(no longer active)]

I'll attach two test cases to this bug to demonstrate the issue.

I encountered this when I was working on bug 389321.  I'm going to disable the respective reftest <http://mxr.mozilla.org/mozilla-central/source/layout/reftests/bugs/503531-1.html> in that bug for now.  When this bug is fixed, that reftest should be re-enabled.

Comment 1

[(no longer active)]

Attachment: Incorrect case

This is what the frame tree for this test case looks like: http://pastebin.mozilla.org/827730

Note that the y position of the empty text frame is 1152.  This is wrong.

Comment 2

[(no longer active)]

Attachment: Correct case

Here's what the frame tree for this test case looks like: http://pastebin.mozilla.org/827732

Note that the y value for the textframe which contains \u200c (ZWNJ) is 1248, which is the correct value.