Bug 178584 – Support ::before/::after pseudo elements with display:contents

• Component: CSS
• Status: RESOLVED FIXED

[Antti Koivisto]

::before { display:contents; content:'foo' }

[Antti Koivisto]

Created attachment 324398 [details]
patch

[Build Bot]

Comment on attachment 324398 [details]
patch

Attachment 324398 [details] did not pass mac-ews (mac):
Output: http://webkit-queues.webkit.org/results/4933455

New failing tests:
svg/custom/assert-empty-layout-attributes.svg
svg/text/svg-rtl-text-crash.html
svg/custom/crash-textPath-attributes.html

[Build Bot]

Created attachment 324403 [details]
Archive of layout-test-results from ews100 for mac-elcapitan

The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: ews100  Port: mac-elcapitan  Platform: Mac OS X 10.11.6

[Build Bot]

Comment on attachment 324398 [details]
patch

Attachment 324398 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: http://webkit-queues.webkit.org/results/4933517

New failing tests:
svg/custom/assert-empty-layout-attributes.svg
svg/text/svg-rtl-text-crash.html
svg/custom/crash-textPath-attributes.html

[Build Bot]

Created attachment 324405 [details]
Archive of layout-test-results from ews125 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews125  Port: ios-simulator-wk2  Platform: Mac OS X 10.12.6

[Build Bot]

Comment on attachment 324398 [details]
patch

Attachment 324398 [details] did not pass mac-debug-ews (mac):
Output: http://webkit-queues.webkit.org/results/4933658

New failing tests:
svg/custom/assert-empty-layout-attributes.svg
svg/text/svg-rtl-text-crash.html
svg/custom/crash-textPath-attributes.html

[Build Bot]

Created attachment 324408 [details]
Archive of layout-test-results from ews115 for mac-elcapitan

The attached test failures were seen while running run-webkit-tests on the mac-debug-ews.
Bot: ews115  Port: mac-elcapitan  Platform: Mac OS X 10.11.6

[Antti Koivisto]

Created attachment 324426 [details]
patch

[Ryosuke Niwa]

Comment on attachment 324426 [details]
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=324426&action=review

> Source/WebCore/style/RenderTreeUpdaterGeneratedContent.cpp:117
> +            removeAndDestroyContentRenderers(*pseudoElement);
> +

Could you clarify why this code change is needed in the change log?

> Source/WebCore/style/RenderTreeUpdaterGeneratedContent.cpp:156
> +        if (pseudoElementRenderer)
> +            renderTreePosition.moveToLastChild();
> +        else
> +            renderTreePosition.computeNextSibling(*pseudoElement);

Could you also describe why code to move to the next sibling is needed in the change log?

[Antti Koivisto]

Added this:

(WebCore::RenderTreeUpdater::GeneratedContent::updatePseudoElement):

In the normal case create a render tree position for the pseudo element renderer and use RenderTreePosition::moveToLastChild to make it a valid position. (The existing RenderTreePosition interface didn't have way to move to positions in anonymous boxes) 

In the case of a non box generating display:contents pseudo element, use the current render tree position instead.

Ensure that pseudo element renderers are destroyed before creating the new ones since in display:contents case they are not descendants of the pseudo renderer and don't get cleared automatically.

[Antti Koivisto]

Created attachment 324496 [details]
patch

[WebKit Commit Bot]

Comment on attachment 324496 [details]
patch

Clearing flags on attachment: 324496

Committed r223810: <https://trac.webkit.org/changeset/223810>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/35517782>