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Implement shadow dom slots (#35013)

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* 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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15
tests/wpt/meta/dom/idlharness.window.js.ini vendored
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@ -8,18 +8,9 @@
[AbortSignal must be primary interface of new AbortController().signal]
expected: FAIL
[Element interface: element must inherit property "assignedSlot" with the proper type]
expected: FAIL
[Text interface: document.createTextNode("abc") must inherit property "assignedSlot" with the proper type]
expected: FAIL
[Event interface: attribute composed]
expected: FAIL
[Text interface: attribute assignedSlot]
expected: FAIL
[AbortSignal interface: existence and properties of interface prototype object's @@unscopables property]
expected: FAIL
@ -65,9 +56,6 @@
[Element interface: operation after((Node or DOMString)...)]
expected: FAIL
[Element interface: attribute assignedSlot]
expected: FAIL
[CharacterData interface: existence and properties of interface prototype object's @@unscopables property]
expected: FAIL
@ -197,9 +185,6 @@
[ShadowRoot interface: attribute delegatesFocus]
expected: FAIL
[ShadowRoot interface: attribute slotAssignment]
expected: FAIL
[XSLTProcessor interface: existence and properties of interface object]
expected: FAIL