[CSS Regions] Absolutely positioned regions do not expand to fill their container

• Component: CSS
• Status: RESOLVED FIXED

[Mihai Balan]

Created attachment 174428 [details]
HTML file highlighting the problem

When a region is absolutely positioned (position: absolute) and sized by specifying all four of top, left, bottom, right it should size to the size of its containing block. Instead, it "collapses" to a zero-height region.

[Mihnea Ovidenie]

Created attachment 175851 [details]
Patch

[Julien Chaffraix]

Comment on attachment 175851 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=175851&action=review

> LayoutTests/ChangeLog:3
> +        [CSS Regions] Absolutely positioned region does not expand to fill its container

Nit: The name sounds weird to me (non-native English speaker though), either missing a leading "An" or a generic plural (Absolutely positioned regions do not ...).

Also the name could be improved: you are fixing the case where you have set your logical height and we wouldn't be expanding in the logical width.

> LayoutTests/fast/regions/autosize-abspos-anchoredregion.html:6
> +            .region { -webkit-flow-from: flow; position: absolute; top: 0px; left: 0px; right: 0px; bottom: 0px; background-color: green; }

You are over-constraining your region in most cases below as you have top & bottom, left & right set at the same time, which forces the size of your element.

> LayoutTests/fast/regions/autosize-abspos-anchoredregion.html:19
> +        </style>

A good addition would be a vertical writing-mode test for that too.

[Mihnea Ovidenie]

Created attachment 176194 [details]
Patch for landing

[WebKit Review Bot]

Comment on attachment 176194 [details]
Patch for landing

Rejecting attachment 176194 [details] from commit-queue.

New failing tests:
inspector-protocol/debugger-terminate-dedicated-worker-while-paused.html
Full output: http://queues.webkit.org/results/14982976

[Mihnea Ovidenie]

Created attachment 176233 [details]
Patch for landing

[Mihnea Ovidenie]

(In reply to comment #4)
> (From update of attachment 176194 [details])
> Rejecting attachment 176194 [details] from commit-queue.
> 
> New failing tests:
> inspector-protocol/debugger-terminate-dedicated-worker-while-paused.html
> Full output: http://queues.webkit.org/results/14982976

Unrelated, trying again.

[WebKit Review Bot]

Comment on attachment 176233 [details]
Patch for landing

Clearing flags on attachment: 176233

Committed r135851: <http://trac.webkit.org/changeset/135851>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.