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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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--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 851230e57ac8775707df5f0f103be5feac81fc41
This is on top of https://github.com/servo/servo/pull/15928.
Now that cascade() gets a Device ref, we can use the default computed values
from there to avoid propagating that state all over the place.
Source-Repo: https://github.com/servo/servo
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--HG--
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--HG--
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Reviewed upstream by @heycam
cc @bholley, didn't end up renaming the `layout_parent` thing, because it made the cascade way more verbose (and difficult to understand IMO) unnecessarily, and you said you were ok-ish with it.
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--HG--
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Converted some longhands into `vector_longhand` to reduce some repeated codes.
Also some of longhands with same `SpecifiedValue` and `computed_value::T` changed. Re-exported SpecifiedValue instead of computed_value::T. Normally a computed_value can't have a parse function.
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This is a revised PR for #14732.
@emilio?
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Style no forced docs for the properties code and similar, but I ran out of time, and I think it's a nice improvement.
I'd appreciate a fast-ish turn-around time because this is pretty much prone to bitrot.
Source-Repo: https://github.com/servo/servo
Source-Revision: bd67163438317daa711b2411ce302aaf5bf4136a
See commits for details. This improves nytimes.com quite a bit.
r? @notriddle
Source-Repo: https://github.com/servo/servo
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We're using `keyword_list` to generate code for some of the animation properties. This could be achieved with `single_keyword` (passing `vector=True`).
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r? @emilio
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This commit itself only moves things around and adds an extra parameter to the
`apply_declarations` function to eventually handle #14079 correctly.
Probably needs a more granular API to query fonts, á la nsFontMetrics, but
that's trivial to do once this is landed.
Then we should make the font provider mandatory, and implement the missing stylo
bits.
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This patch introduces infrastructure for the rule tree, and constructs it.
We don't use it yet, nor have good heuristics for GC'ing it, but this should not
happen anymore once we store the rule node reference in the node.
I haven't messed up with memory orders because I want to do a try run with it,
then mess with them.
Source-Repo: https://github.com/servo/servo
Source-Revision: ac0475971bb24a63ca5d36d1d17e3036ddb99049
Previously, `string-cache` defined:
* An string-like `Atom` type,
* An `atom!("foo")` macro that expands to a value of that type, for a set of strings known at compile-time,
* A `struct Namespace(Atom);` type
* A `ns!(html)` macro that maps known prefixed to `Namespace` values with the corresponding namespace URL.
Adding a string to the static set required making a change to the `string-cache` crate.
With 0.3, the `Atom` type is now generic, with a type parameter that provides a set of static strings. We can have multiple such sets, defined in different crates. The `string_cache_codegen` crate, to be used in build scripts, generates code that defines such a set, a new atom type (a type alias for `Atom<_>` with the type parameter set), and an `atom!`-like macro.
The html5ever repository has a new `html5ever_atoms` crate that defines three such types: `Prefix`, `Namespace`, and `LocalName` (with respective `namespace_prefix!`, `namespace_url!`, and `local_name!` macros). It also defines the `ns!` macro like before.
This repository has a new `servo_atoms` crate in `components/atoms` that, for now, defines a single `Atom` type (and `atom!`) macro. (`servo_atoms::Atom` is defined as something like `type Atom = string_cache::Atom<ServoStaticStringSet>;`, so overall there’s now two types named `Atom`.)
In this PR, `servo_atoms::Atom` is used for everything else that was `string_cache::Atom` before. But more atom types can be defined as needed. Two reasons to do this are to auto-generate the set of static strings (I’m planning to do this for CSS property names, which is the motivation for this change), or to have the type system help us avoid mix up unrelated things (this is why we had a `Namespace` type ever before this change).
Introducing new types helped me find a bug: when creating a new attribute `dom::Element::set_style_attr`, would pass `Some(atom!("style"))` instead of `None` (now `Option<html5ever_atoms::Prefix>` instead of `Option<string_cache::Atom>`) to the `prefix` argument of `Attr::new`. I suppose the author of that code confused it with the `local_name` argument.
---
Note that Stylo is not affected by any of this. The `gecko_string_cache` module is unchanged, with a single `Atom` type. The `style` crate conditionally compiles `Prefix` and `LocalName` re-exports for that are both `gecko_string_cache::Atom` on stylo.
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The main motivation is to use `parking_lot::RwLock` instead of `sync::RwLock` in `style::context`, so that we can make `Stylesheet` be hold in a `parking_lot::RwLock` like other structs used for geckolib.
r? @SimonSapin
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As discussed in https://bugzilla.mozilla.org/show_bug.cgi?id=1305141Closes#13176
---
Original PR title: Stop relying on `impl<T: HeapSizeOf> HeapSizeOf for Arc<T>`
https://github.com/servo/heapsize/issues/37#issuecomment-249861171
This builds on top of that.
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--HG--
rename : servo/components/style/domrefcell.rs => servo/components/script/dom/bindings/cell.rs
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Since #13134, the "normal" and "important" parts of `Stylist` are identical, so we don’t need to store them twice.
r? @emilio
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Have a single Vec instead of two. Fix#3426
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Fixes https://github.com/servo/servo/issues/12835
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r? @bholley
cc @heycam
Source-Repo: https://github.com/servo/servo
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- [X] `./mach build -d` does not report any errors
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- [X] These changes fix#12554 (github issue number if applicable).
- [x] There are tests for these changes
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Source-Revision: 27d8fb380750d7ae2f243dc35a3789fed148ffa3
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r? @SimonSapin for the style changes, @Ms2ger or @jdm for the dom and test changes
Source-Repo: https://github.com/servo/servo
Source-Revision: 14aeccc33ab44d706df86fbce67339218efe710c
Background:
The changes to Servo code to support Stylo began in the `selectors` crate with making pseudo-elements generic, defined be the user, so that different users (such as Servo and Gecko/Stylo) could have a different set of pseudo-elements supported and parsed. Adding a trait makes sense there since `selectors` is in its own repository and has others users (or at least [one](https://github.com/SimonSapin/kuchiki)).
Then we kind of kept going with the same pattern and added a bunch of traits in the `style` crate to make everything generic, allowing Servo and Gecko/Stylo to do things differently. But we’ve also added a `gecko` Cargo feature to do conditional compilation, at first to enable or disable some CSS properties and values in the Mako templates. Since we’re doing conditional compilation anyway, it’s often easier and simpler to do it more (with `#[cfg(feature = "gecko")]` and `#[cfg(feature = "servo")]`) that to keep adding traits and making everything generic. When a type is generic, any method that we want to call on it needs to be part of some trait.
----
The first several commits move some code around, mostly from `geckolib` to `style` (with `#[cfg(feature = "gecko")]`) but otherwise don’t change much.
The following commits remove some traits and many type parameters through the `style` crate, replacing them with pairs of conditionally-compiled API-compatible items (types, methods, …).
Simplifying code is nice to make it more maintainable, but this is motivated by another change described in https://github.com/servo/servo/pull/12391#issuecomment-232183942. (Porting Servo for that change proved difficult because some code in the `style` crate was becoming generic over `String` vs `Atom`, and this PR will help make that concrete. That change, in turn, is motivated by removing geckolib’s `[replace]` override for string-cache, in order to enable using a single Cargo "workspace" in this repository.)
r? @bholley
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Source-Revision: 2d01d41a506bcbc7f26a2284b9f42390d6ef96ab
--HG--
rename : servo/ports/geckolib/selector_impl.rs => servo/components/style/gecko_selector_impl.rs
rename : servo/ports/geckolib/values.rs => servo/components/style/gecko_values.rs
rename : servo/ports/geckolib/properties.mako.rs => servo/components/style/properties/gecko.mako.rs
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Part of #11916.
r? @SimonSapin
Source-Repo: https://github.com/servo/servo
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If we're restyling a page with animations and layout takes too long, we
might still have the expired animations from the last restyle, without these
being cleared out by layout on `tick_animations`.
Unfortunately it's hard (near to impossible?) to make a reduced test case for
this, since it heavily depends on the speed of the build and conditions that
only happen under heavy loads.
Mainly, it depends on how accurately the `TickAllAnimations` message is sent
from the constellation.
Thus, we can't just re-expire an animation, and we should re-check for it as a
previous animation.
Fixes#12171
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@bholley: I was going to do this "the good way", but that involves quite a few properties, so I thought I'd rather unlock stylo before :)
r? @bholley
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As a follow-up, we could move all the data living under a mutex in the
SharedLayoutContext only in order to create the local context to the same place.
This should increase animation performance when there are multiple animations in
one page that happen to be on different threads.
r? @SimonSapin/@mbrubeck for the style/layout, @bholley for the geckolib changes
Source-Repo: https://github.com/servo/servo
Source-Revision: ec0d3e084dbaecf749a67ba52e5f680262960a29
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This adds support for parsing `@keyframes` rules, and animation properties. Stylo will need it sometime soonish, plus I want to make animations work in Servo.
The remaining part is doin the math and trigger the animations correctly from servo. I don't expect it to be *that* hard, but probaby I'll need to learn a bit more about the current animation infra (e.g. why the heck is the `new_animations_sender` guarded by a `Mutex`?).
I'd expect to land this, since this is already a bunch of work, this is the part exclusively required by stylo (at least if we don't use Servo's machinery), the media query parsing is tested, and the properties land after a flag, but if you prefer to wait until I finish this up it's fine for me too.
r? @SimonSapin
cc @pcwalton @bholley
Source-Repo: https://github.com/servo/servo
Source-Revision: d3a81373e44634c30d31da0457e1c1e86c0911ed
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Source-Revision: 2f9796fa696e9514280777398467696dd4f004b3
This helps with style struct alignment between Servo and Gecko.
Source-Repo: https://github.com/servo/servo
Source-Revision: 8bc4785bed662f87149260d87e030471c326ec88
More work as described in #10185.
I am getting _extremely_ weird compile-time errors with this one, when it's trying to expand the `lazy_static!` macro. I think I'll need help getting that part sorted out. The rest should be pretty OK.
Anyone has ideas on how to resolve it?
Source-Repo: https://github.com/servo/servo
Source-Revision: a4991f536cb60b70309358cbb4da46dfbe412b3d
Fixes#10403. Animation had an extra transition-delay property, which was also moved to Box. Let me know if I should squash the commits.
Source-Repo: https://github.com/servo/servo
Source-Revision: 256b865055c10082731b218f41373d47ad632062
This is the first part of #10185. More to follow. I have built this locally with both servo and geckolib without errors; let's see if it succeeds on all platforms as well.
Source-Repo: https://github.com/servo/servo
Source-Revision: 639fdd6b128e0cfd418e4ae0dd78de3f5aecac4c
This allows geckolib to pass gecko style structs and have the style system write to them directly, provided we implement all the traits.
Source-Repo: https://github.com/servo/servo
Source-Revision: 605842f193aedc1151ab38a99c49f693c76e5cf3
This allows, among other things, having different implementations for parsing pseudo{elements, classes} in both `ports/geckolib` and in servo.
Source-Repo: https://github.com/servo/servo
Source-Revision: c11844cbf28054784c8d65781cff20045d8ee48b
