This change fix this bugs: modify stylesheet of shadow tree does not
take effect if there is no other Dom change within the shadow tree
happens.
Fixes: This change fix some bugs reported by this issue #38211.
Testing: This fixes some subtests in
`/css/cssom/CSSStyleSheet-constructable.html` and
`/css/cssom/CSSStyleSheet-constructable-disallow-import.tentative.html`,
and make some subtest failed in
`/css/cssom/CSSStyleSheet-constructable-baseURL.html`, because the
`BaseUrl` is not yet supported for `CSSStylesheet`.
Signed-off-by: sharpshooter_pt <ibluegalaxy_taoj@163.com>
This change supplements the missing stylesheet invalidation
notifications to fix some bugs that the modification of stylesheet does
not take effect. Additionally, this PR add a RAII thing to mark the
modification scope of stylesheet rules, which will facilitate to add
extra logic before the modification happens.
Fixes: there is relevant issue #38211 , but it can't be fixed by this
PR.
Testing: This fixes some subtests in
`/css/cssom/CSSStyleSheet-constructable.html`.
Signed-off-by: sharpshooter_pt <ibluegalaxy_taoj@163.com>
Spec:
https://drafts.csswg.org/cssom/#dom-documentorshadowroot-adoptedstylesheets
Implement `DocumentOrShadowDOM.adoptedStylesheet`. Due to
`ObservableArray` being a massive issue on its own, it will be as it was
a `FrozenArray` at first. This approach is similar to how Gecko
implement adopted stylesheet. See
https://phabricator.services.mozilla.com/D144547#change-IXyOzxxFn8sU.
All of the changes will be gated behind a preference
`dom_adoptedstylesheet_enabled`.
Adopted stylesheet is implemented by adding the setter and getter of it.
While the getter works like a normal attribute getter, the setter need
to consider the inner working of document and shadow root StylesheetSet,
specifically the ordering and the invalidations. Particularly for
setter, we will clear all of the adopted stylesheet within the
StylesheetSet and readd them. Possible optimization exist, but the focus
should be directed to implementing `ObservableArray`.
More context about the implementations
https://hackmd.io/vtJAn4UyS_O0Idvk5dCO_w.
Testing: Existing WPT Coverage
Fixes: https://github.com/servo/servo/issues/37561
---------
Signed-off-by: Jo Steven Novaryo <jo.steven.novaryo@huawei.com>
