Fix influence of <slot> on dir=auto computation of its shadow tree ancestors. #41584
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…cestors. This change treats a <slot> element as being a strong character, of its resolved directionality, when resolving dir=auto on its shadow tree ancestor. This is behind the RuntimeEnabledFeatures::CSSPseudoDirEnabled() flag because we're hoping to ship that feature soon and it makes sense to ship related changes to direction handling all at once rather than piecemeal. This is based on the proposed behavior described in: whatwg/html#3699 (comment) which is in the process of being specified in: whatwg/html#9166 whatwg/html#9452 whatwg/html#9554 This fixes the failures of: external/wpt/shadow-dom/directionality/dir-shadow-30.html external/wpt/shadow-dom/directionality/dir-shadow-34.html in the still-unlanded WPT PR at #29820 This also changes the existing WPT html/dom/elements/global-attributes/dir-slots-directionality.tentative.html in the following ways: * split the test into separate test() functions to get separate results * add a sixth test testing <slot dir=auto></slot> * add tests of the :dir() selector for each test (where Chromium fails this test for test 1) * change the expected result of the fourth test to match this code change and the proposed specification Bug: 576815 Change-Id: I83551e9bc5807109c5318bace486cfc93fc25bbb Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4800366 Reviewed-by: Di Zhang <dizhangg@chromium.org> Commit-Queue: David Baron <dbaron@chromium.org> Cr-Commit-Position: refs/heads/main@{#1186743}
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This change treats a <slot> element as being a strong character, of its
resolved directionality, when resolving dir=auto on its shadow tree
ancestor.
This is behind the RuntimeEnabledFeatures::CSSPseudoDirEnabled() flag
because we're hoping to ship that feature soon and it makes sense to
ship related changes to direction handling all at once rather than
piecemeal.
This is based on the proposed behavior described in:
whatwg/html#3699 (comment)
which is in the process of being specified in:
whatwg/html#9166
whatwg/html#9452
whatwg/html#9554
This fixes the failures of:
external/wpt/shadow-dom/directionality/dir-shadow-30.html
external/wpt/shadow-dom/directionality/dir-shadow-34.html
in the still-unlanded WPT PR at
#29820
This also changes the existing WPT
html/dom/elements/global-attributes/dir-slots-directionality.tentative.html
in the following ways:
this test for test 1)
change and the proposed specification
Bug: 576815
Change-Id: I83551e9bc5807109c5318bace486cfc93fc25bbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4800366
Reviewed-by: Di Zhang <dizhangg@chromium.org>
Commit-Queue: David Baron <dbaron@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1186743}