(writing modes) Orthogonal flows which overflow should be wrapped into columns in the flow direction of the containing block

• Component: CSS
• Status: NEW ---

[Theresa O'Connor]

Created attachment 101012 [details]
Demo of current behavior

See §7.3.2. Multi-column Layout in Orthogonal Flows of CSS3 Writing Modes: http://dev.w3.org/csswg/css3-writing-modes/#orthogonal-multicol

[Theresa O'Connor]

<rdar://problem/9783787>

[Gérard Talbot]

1- The description of what the test should lay out (expected results) is not clear, is not explicit: "This document should not be T-shaped".

2- FWIW, I get the same layout in both Firefox 54 and Chrome 60, once I add unprefixed property names:

 |¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|
 |  Containing flow    |
 |                     |
 -----------------------------------
 |                                 |
 |                                 | 
 |                                 |
 |                                 |
 |                                 |
 |                                 |
 |                                 |
 |                                 |
 |                                 |
 |                                 |
 |                                 |
 |                                 |
 -----------------------------------
 |                     |
 |  Containing flow    |
 |                     |
 -----------------------

3- The original section regarding multi-column element in orthogonal flow "7.3.2 Auto-sizing Block Containers in Orthogonal Flows" was at-risk 
https://www.w3.org/TR/css-writing-modes-3/#auto-multicol
and is no longer in the Editor's draft:

"
Deferred the automatic multi-column behavior of orthogonal flows to Level 4.
"
https://drafts.csswg.org/css-writing-modes-3/#changes-201512

4- Therefore, I think P2 is not justified.

[Gérard Talbot]

I revisited this bug report and now understand what "This document should not be T-shaped" means, refers to.

I have developed related [multi-column containers in orthogonal flow] 
tests in 

http://www.gtalbot.org/BrowserBugsSection/CSS4WritingModes/

and there are a few others in

orthogonal multi-column with a vertical writing-mode computes height to fill page rather than wrap contents
https://bugzilla.mozilla.org/show_bug.cgi?id=1269152

and I hope to develop more tests later.