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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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Source-Repo: https://github.com/servo/servo
Source-Revision: bb54f0a429de0e8b8861f8071b6cf82f73622664
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 851230e57ac8775707df5f0f103be5feac81fc41
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According to https://github.com/servo/servo/pull/3069 the cached thread local context is introduced for green threads. Now green threads has gone, and the existence of cache force us to create a `LayoutContext`, an `AssignISizes` and an `AssignBSizes` for each flow during parallel layout, so the pull request tries to remove it. And it also switch `assign_inline_sizes()` to accept a `LayoutContext` parameter, as according to my current design we need to do full layout to some flex items for column flexbox during assign isize traversal.
Part of #14123.
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Source-Repo: https://github.com/servo/servo
Source-Revision: e2b494b1d08b8929ca7e5ae369304f41af81ace2
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 9cd92ed44acfaa3b2ba04e345b33d21aff3d752c
The primary idea of this patch is to ditch the rigid enum of Previous/Current
styles, and replace it with a series of indicators for the various types of
work that needs to be performed (expanding snapshots, rematching, recascading,
and damage processing). This loses us a little bit of sanity checking (since
the up-to-date-ness of our style is no longer baked into the type system), but
gives us a lot more flexibility that we'll need going forward (especially when
we separate matching from cascading). We also eliminate get_styling_mode in
favor of a method on the traversal.
This patch does a few other things as ridealongs:
* Temporarily eliminates the handling for transfering ownership of styles to the
frame. We'll need this again at some point, but for now it's causing too much
complexity for a half-implemented feature.
* Ditches TRestyleDamage, which is no longer necessary post-crate-merge, and is
a constant source of compilation failures from either needing to be imported
or being unnecessarily imported (which varies between gecko and servo).
* Expands Snapshots for the traversal root, which was missing before.
* Fixes up the skip_root stuff to avoid visiting the skipped root.
* Unifies parallel traversal and avoids spawning for a single work item.
* Adds an explicit pre_traverse step do any pre-processing and determine whether
we need to traverse at all.
Source-Repo: https://github.com/servo/servo
Source-Revision: b9a8ccd775c3192e3810a1730b1d0bc2b5c9dfb6
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Source-Repo: https://github.com/servo/servo
Source-Revision: 68b1d1d2860ac6c6e8c1c0dfe46af6790ca01dc8
--HG--
rename : servo/components/style/gecko/selector_impl.rs => servo/components/style/gecko/selector_parser.rs
rename : servo/components/style/selector_impl.rs => servo/components/style/selector_parser.rs
rename : servo/components/style/servo/selector_impl.rs => servo/components/style/servo/selector_parser.rs
rename : servo/components/style/selector_matching.rs => servo/components/style/stylist.rs
rename : servo/tests/unit/style/selector_matching.rs => servo/tests/unit/style/stylist.rs
We need to hang both snapshots and restyle damage off of ElementData, and so we need them to be concrete to avoid infecting ElementData with the trait hierarchy.
Source-Repo: https://github.com/servo/servo
Source-Revision: d8ac5100e81ccbad4b5131688b96bedb9b5e279d
--HG--
rename : servo/resources/shaders/debug_color.fs.glsl => servo/components/style/servo/mod.rs
rename : servo/components/script_layout_interface/restyle_damage.rs => servo/components/style/servo/restyle_damage.rs
rename : servo/components/style/servo_selector_impl.rs => servo/components/style/servo/selector_impl.rs
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-Repo: https://github.com/servo/servo
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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Source-Repo: https://github.com/servo/servo
Source-Revision: 2f9796fa696e9514280777398467696dd4f004b3
It only supports `color` and `background`, for now, but it shouldn't be hard to add more properties (like text-shadow).
r? @mbrubeck
Source-Repo: https://github.com/servo/servo
Source-Revision: 723989b9dddeb9bcdc28dc7d640fd6fd7247a27f
This reduces the size of the SpecificFragmentInfo enum from 48 to 24.
r? @pcwalton
Source-Repo: https://github.com/servo/servo
Source-Revision: 44b2ba25471e77b89b417161beb312a2985791a1
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 fixes#7846, a failure in the "quotes-036.htm" test. Servo lays out this test correctly in its initial layout, but then messes it up in any relayout (whether it's an incremental or full layout).
The problem is that the ResolveGeneratedContent traversal is not safe to run more than once on the same flow. It mutates some GeneratedContent fragments into ScannedText fragments, but leaves others unmodified (in particular, those that generate empty content). The next time layout runs, these remaining GeneratedContent fragments are processed *again* but with an incorrect correct quote nesting level (because some of the surrounding GeneratedContent fragments are gone).
This patch ensures that each GeneratedContent fragment is resolved only once.
r? @pcwalton
Source-Repo: https://github.com/servo/servo
Source-Revision: 71b1122e97303c51bac73d03d8af617069a75d21
This fixes about 130 clippy lints. Let me know if i should split up the commit.
I wasn't sure about some of the changes, especially map_or instead of map(...).unwrap_or(...) and if let instead of single arm match were not always a strict improvement in my opinion, but i'll leave that decision to the reviewer :)
There are about 150 lints left which i thought were clippy bugs or i didn't know how to fix.
cc @Manishearth
Source-Repo: https://github.com/servo/servo
Source-Revision: 9da739acefc7d1776bf727c8bf782eb79f241028
This is a direct extract from my abandoned PR for a lint (#7546), along with some rather clumsy modifications (only on `components/script/dom/mod.rs` and `components/style/lib.rs`), because I had to sort some of the files again to make peace with tidy, which hasn't been educated about sorting yet!
Source-Repo: https://github.com/servo/servo
Source-Revision: a7208869f2903e36f9b2f540b55b50283d7df466
Known issues:
* The caret doesn't show up if there's no text present, because we don't create text runs in that case. This should be a followup.
* Text runs don't support decomposing ligatures into their constituent subglyphs for advance computation, so the caret won't appear inside a ligature. This is a text run bug.
r? @mbrubeck
Source-Repo: https://github.com/servo/servo
Source-Revision: 6cd098da302db85975d0967ddee836f04eae3bd5
and `for foo in bar.iter_mut(), and for foo in bar.into_iter()
(continuation of #7197)
Source-Repo: https://github.com/servo/servo
Source-Revision: 0d6d6a05009606dfbbfc9765d7dc2c745c18f6a5
Expands on the work by @wilmoz and cleans up the existing errors. Closes#7180. Closes#7111.
Source-Repo: https://github.com/servo/servo
Source-Revision: e74825f9fde8e222f4ba9bb24b2c2a3864c73e5f
They were introduced in 35ba73112395fe97599b8661729b02cedea7609a.
Source-Repo: https://github.com/servo/servo
Source-Revision: be8798b73a28b1ce8301a7e21f3547a1d06cd59a
Fixes#6818. The test still fails because of #6978.
r? @pcwalton
Source-Repo: https://github.com/servo/servo
Source-Revision: b9f00190e1364fb1b9ab8dc089593910c3e34d41
- Use SmallVec<[T; N]>
- Make find_iframe a free function
- Make ProgressEvent use enums for bubbles and cancelable
- Change README, as `rust-snapshot-hash` is just a text file
Source-Repo: https://github.com/servo/servo
Source-Revision: aafc3dfa963b466303d5f241d69036f211aaad00
The util component specified fnv and smallvec as dependencies and publicly
reexported both of them. Several other components utilized these reexports,
presumably because fnv and smallvec used to live in the tree so reexporting
made the transition easier.
These indirect dependencies through the util component are unnecessary.
This commit removes the fnv & smallvec crate reexports in the util component.
It exchange, it adds fnv & smallvec as dependencies to non-util components
wherever needed. Finally, it removes the fnv dependency from util as it is not
utilized anywhere in the util component.
Source-Repo: https://github.com/servo/servo
Source-Revision: 35000a9b854dc0989cc473aaec0ea8c082521c66
`LOCAL_CONTEXT_KEY` is currently a `Cell<*mut LocalLayoutContext>`. The use
of the raw pointer means that the `LocalLayoutContext` is not dropped when
the thread dies; this leaks FreeType instances and probably other
things. There are also some unsafe getter functions in `LayoutContext`
(`font_context`, `applicable_declarations_cache` and
`style_sharing_candidate_cache`) that @eddyb says involve undefined
behaviour.
This changeset changes `LOCAL_CONTEXT_KEY` to
`RefCell<Option<Rc<LocalLayoutContext>>>`. This fixes the leak and also
results in safe getters.
(Fixes #6282.)
Source-Repo: https://github.com/servo/servo
Source-Revision: 0dec64caf01c98d10e72b73e35b994127c23e81f
This improves numerous pages, for example Wikipedia and Ars Technica.
Built on #5493.
Closes#177.
Source-Repo: https://github.com/servo/servo
Source-Revision: 7561f7b83f27811683c1e724d75a935573a72813
Only simple alphabetic and numeric counter styles are supported. (This
is most of them though.)
Although this PR adds a sequential pass to layout, I verified that on
pages that contain a reasonable number of ordered lists (Reddit
`/r/rust`), the time spent in generated content resolution is dwarfed by
the time spent in the parallelizable parts of layout. So I don't expect
this to negatively affect our parallelism expect perhaps in pathological
cases.
Reconstructed from #5138 via raw diffing.
r? @SimonSapin
Source-Repo: https://github.com/servo/servo
Source-Revision: fd1bb49a65dd998c8ef9890a1576aaf62ddfdba1
Only simple alphabetic and numeric counter styles are supported. (This
is most of them though.)
Although this PR adds a sequential pass to layout, I verified that on
pages that contain a reasonable number of ordered lists (Reddit
`/r/rust`), the time spent in generated content resolution is dwarfed by
the time spent in the parallelizable parts of layout. So I don't expect
this to negatively affect our parallelism expect perhaps in pathological
cases.
Moved from #4544, because Critic.
Fixes#4544.
Source-Repo: https://github.com/servo/servo
Source-Revision: 5cd6316addc1acf145ed3220719387ef6ef08d2f
