Implement shadow dom slots (#35013)

* Implement slot-related algorithms

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Hook up slot elements to DOM creation logic

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Set a slot assignment mode for servo-internal shadow roots

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Assign slots when a slottable's slot attribute changes

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Properly compute slot name

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* ./mach test-tidy

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Update <slot> name when name attribute changes

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Implement fast path for Node::assign_slottables_for_a_tree

assign_slottables_for_a_tree traverses all descendants of the node
and is potentially very expensive. If the node is not a shadow root
then assigning slottables to it won't have any effect, so we
take a fast path out.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Move slottable data into ElementRareData

This shrinks all element descendants back to their
original size.

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Address review comments

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Update WPT expectations

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
This commit is contained in:
Simon Wülker 2025-01-19 15:05:05 +01:00 committed by GitHub
parent 8bb50fa3c9
commit dabe162d44
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31 changed files with 758 additions and 355 deletions

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@ -1,33 +1,31 @@
[imperative-slot-api-slotchange.html]
expected: TIMEOUT
[slotchange event must not fire synchronously.]
expected: FAIL
[slotchange event should not fire when assignments do not change assignedNodes.]
expected: FAIL
expected: TIMEOUT
[slotchange event should not fire when same node is assigned.]
expected: FAIL
expected: TIMEOUT
[Fire slotchange event when slot's assigned nodes changes.]
expected: FAIL
expected: TIMEOUT
[Fire slotchange event on previous slot and new slot when node is reassigned.]
expected: FAIL
expected: TIMEOUT
[Fire slotchange event on node assignment and when assigned node is removed.]
expected: FAIL
expected: TIMEOUT
[Fire slotchange event when order of assigned nodes changes.]
expected: FAIL
expected: TIMEOUT
[Fire slotchange event when assigned node is removed.]
expected: FAIL
expected: TIMEOUT
[Fire slotchange event when removing a slot from Shadows Root that changes its assigned nodes.]
expected: FAIL
expected: NOTRUN
[Fire slotchange event when assign node to nested slot, ensure event bubbles ups.]
expected: FAIL
expected: TIMEOUT
[Signal a slot change should be done in tree order.]
expected: FAIL
expected: NOTRUN