[Webkit-unassigned] [Bug 96841] New: Vertical writing mode block ignores horizontal children when calculating height

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=96841

           Summary: Vertical writing mode block ignores horizontal
                    children when calculating height
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: johnme at chromium.org
                CC: jchaffraix at webkit.org, ojan at chromium.org
            Blocks: 46123


Created an attachment (id=164250)
 --> (https://bugs.webkit.org/attachment.cgi?id=164250&action=review)
Testcase

When a vertical-lr block with height:auto contains a horizontal-tb child, it's computed height ends up being just the height of its child's borders, ignoring the actual content of the child.

This seems pretty broken. My reading of http://dev.w3.org/csswg/css3-writing-modes/#orthogonal-flows and http://dev.w3.org/csswg/css3-writing-modes/#orthogonal-auto is that:

- max-content is the height of .inner (the green box)*
- min-content is the height of .inner (the green box)*
- fill-available is infinite since the height of the body is auto, so is ignored
- fill-fallback is the height of the initial containing block

Hence contentHeight of .outer = min(max-content, max(min-content, fill-fallback)) = height of .inner (the green box) [including .inner's borders and padding].

*: Though it's not clear how orthogonal writing mode interacts with the definitions of min-content and max-content (http://dev.w3.org/csswg/css3-writing-modes/#min-content), where min-content supposes that "all line break opportunities within the box were taken" and max-content supposes that "none of the optional line break opportunities within the box were taken"; indeed that seems somewhat backwards in this situation.

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