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Some properties only accept non-negative values, or values greater than or equal to one. It is possible to produce an negative interpolated values while using negative timing functions, so we have to apply a restriction to these values to avoid getting invalid values.
For example, line-height must be non-negative, but the output progress of some timing functions (e,g. cubic-bezier(0.25, -2, 0.75, 1)) may be a negative value, so the interpolated result of line-height is also negative.
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The `stylearc` alias is left there temporarilly and will be removed completely in a later commit/PR where also `components/style/gecko/generated/structs_{debug|release}.rs` are re-generated (they still use the old alias).
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Initial work for implementing custom element reactions: https://html.spec.whatwg.org/multipage/custom-elements.html#custom-element-reactions
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This implements the CE-related steps when creating elements. `is` is now support by `document.createElement` and is stored on `Element`s. Only synchronously created autonomous elements are supported as async element creation and customized built-in elements both require custom element upgrade reactions.
Spec: https://dom.spec.whatwg.org/#concept-create-element
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* scrollLeft/scrollTop returned values of parent or even document root
Only the scroll of the node itself is returned. Otherwise 0.0.
* Scrolling via script had set viewport.
This resulted in other nodes appearing scrolled.
Now scroll_offsets are updated with correct node id.
These bugs caused other odd behavior like both body and
document.documentElement being scrolled or the view for scrolled
elements jumping.
Also try scrolling this [example page](https://pyfisch.org/stuff/scrolltest.html) in servo with and without this change.
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Reviewed by bholley and emilo on the bugzilla bug.
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This requires https://github.com/servo/rust-cssparser/pull/143 for the final commit. There's no better way to split that work up, unfortunately, and it's extremely easy to bitrot. I would appreciate if we could expedite reviewing this work.
This is the work necessary to enable https://bugzilla.mozilla.org/show_bug.cgi?id=1352669. It makes sense to merge it separately because it's so much effort to keep it up to date with the ongoing Stylo work.
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This is the Servo side change of [bug 1345709](https://bugzilla.mozilla.org/show_bug.cgi?id=1345709).
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On top of https://github.com/servo/servo/pull/16890.
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Rebased from #16668.
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https://bugzilla.mozilla.org/show_bug.cgi?id=1364914
Upcoming changes for visited support and others as well need to pass more args through matching, so this creates a MatchingContext to group them together.
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I just changed the `prefix` parameters on the constructors of several HTML elements. The type now is `Option<Prefix>`. I also changed the sizes of the `sizeof.rs` unit test to match the new values.
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The Gecko side doesn't propagate its quirks mode yet.
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DOMRectList was removed last back in 2015. See
https://www.w3.org/Bugs/Public/show_bug.cgi?id=26200 for details.
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r=xidorn https://bugzilla.mozilla.org/show_bug.cgi?id=1349417
(take 2, we backed out the last one due to heap hazards)
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…so with proper alignment.
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This version enables [struct field reordering][1] which brings the size of the types for specified values of some CSS properties under the threshold such that they shouldn’t be boxed anymore, making unit tests fail.
Simply unboxing them moves the test failure to Stylo’s unit tests, since the stable compiler used in that case does not do field re-ordering. Therefore, we manually reorder a couple fields to effectively bring this optimization to older compilers for a few specific types.
[1]: https://github.com/rust-lang/rust/pull/40377
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This PR aims to solve issue #15729. I tried to follow the recommendations there as much as possible.
This is my first attempt at contributing to Servo, so this will probably need a lot of input, although I'm eager to make it as polished as possible.
- The base inaccuracy issue seems solved, as can be easily verified with the `console.log` based example in the issue.
- Very basic unit tests were added.
I have doubts mainly about the right way to represent these new enum variants for the various length units:
1. With new enum variants in `NoCalcLength` *and* newtypes (current solution)
2. With a `NoCalcLength::Absolute` variant that contains a new `AbsoluteLength` enum, but without newtypes
3. Same as solution 2 but with newtypes
- I mostly cared about unit tests until now but will investigate other types of tests
- Tests to check the clamping
- Write a proper commit message
Thanks for your time and feedback :)
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Also refactors a lot of the restyle hint code to use these new hooks, and removes a lot of hacks in servo that shouldn't be needed because of correct handling of restyles due to attribute changes.
I just smoketested this, so going for a full try run now.
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In Gecko, these keywords compute to different values depending on the
font.
See https://bugzilla.mozilla.org/show_bug.cgi?id=1341775
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Before this PR, every object reflected in CSSOM is in `Arc<RwLock<_>>` to enable safe (synchronized) mutable aliasing. Acquiring all these locks has significant cost during selector matching:
* https://bugzilla.mozilla.org/show_bug.cgi?id=1311469
* https://bugzilla.mozilla.org/show_bug.cgi?id=1335941
* https://bugzilla.mozilla.org/show_bug.cgi?id=1339703
This PR introduce a mechanism to protect many objects with the same `RwLock` that only needs to be acquired once.
In Stylo, there is one such lock per process (in a `lazy_static`), used for everything.
I non-Stylo Servo, I originally intended to have one such lock per document (for author-origin stylesheets, and one per process for user-agent and user sytlesheets since they’re shared across documents, and never mutated anyway). However I failed to have the same document-specific (or pipeline-specific) `Arc` reachable from both `Document` nodes and `LayoutThread`. Recursively following callers lead me to include this `Arc` in `UnprivilegedPipelineContent`, but that needs to be serializable. So there is a second process-wide lock.
This was previously #15998, closed accidentally.
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I think these properties are generally rare enough that they're not worth adding 8 bytes of memmove overhead on every PropertyDeclaration. There are a _lot_ of 24-byte properties though, so I think that's probably a good sustainable level.
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