333643 - table caption 1px jog

Status: RESOLVED DUPLICATE of bug 155955

(Core :: Layout: Tables, defect)

Description

[Davin]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1

When using a caption inside a table with borders the caption ends up being 1px less in width than the rest of the table.

Reproducible: Always

Steps to Reproduce:
Table which is any width and border-collapse set to collape
Table caption which has a background color and 1 px border
Table cells which have background color and 1 px border
Actual Results:  
In this scenario the caption will be 1 px less in width on the left side of the table and thus not lining up with the rest of the table.

Expected Results:  
The caption should be the same width as the rest of the table.

Comment 1

[José Jeria]

Please attach a testcase showing this issue:
https://bugzilla.mozilla.org/attachment.cgi?bugid=333643&action=enter

Comment 2

[Davin]

Attachment: 1 px caption jog

This attachment is a working case of the issue described.  After looking into it further I think the issue has to do with border-collapse.

Comment 3

[José Jeria]

See this with latest trunk as well, Windows XP.

Comment 4

[Morgan Roderick]

See this on WinXP with 1.5.0.2, have seen it with earlier versions as well.

Davin's attachment demonstrates the issue entirely.

Comment 5

[Robin Whittleton]

Seeing this as well, and from my understanding of the specs (specifically the diagram in 17.4 - http://www.w3.org/TR/CSS21/tables.html#q5 ) the caption margins and borders shouldn't be affected by the borders and margins of the main table.

Fwiw it's possible that this is a dupe of bug #297676

Comment 6

[Dahu]

Mozilla/5.0 (Windows; U; Windows NT 5.0; fr; rv:1.8.0.7) Gecko/20060909 Firefox/1.5.0.7

Same problem today, I was designing a site and was facing the problem.
Davin's attachment was still demonstrating the problem.

Comment 7

[Daniel.S]

The border of border-collapsed tables used to be drawn outside the table dimensions (for example it was drawn over the margin).
So in this case, table and caption got the same width, but the table's border is drawn outside the box.

This was recently redefined by CSS 2.1 and was then fixed in bug 155955.