1638491 - Some suboptimal rendering of auto height block's bottom border and padding

Status: NEW

(Core :: Layout: Block and Inline, defect)

Description

[Ting-Yu Lin [:TYLin] (PST, UTC-8)]

Attachment: suboptimal-block-border-padding.html

The problem is described originally in my comment on phabricator. Quoted here.

For a block frame, if its content fits (i.e. its content is complete), but it doesn't fit with the bottom border and padding added. Our current rendering isn't optimal, and it depends on whether it has auto block-size or not. (Note: a block frame always gives its children available block-size without subtracting its block-end border and padding, and yes, even if it has box-decoration-break: clone. See bug 1564726)

See David's interpretation of the spec on possible break points in this review comment.

Comment 1

[Ting-Yu Lin [:TYLin] (PST, UTC-8)]

I hope the testcase explains itself of what needs to be fixed.