Just use WebRender's ClipId directly. This will allow us to create and
use ReferenceFrames in the future, if we need to do that. It will also
make it easier to have Servo responsible for creating the root
scrolling area, which will allow removing some old hacks in the future.
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Source-Repo: https://github.com/servo/servo
Source-Revision: 6e05a903afe81af5a45067dde4f9af26a2ea4be2
--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : ed3c05a3a6ad1de7c189632886473e8b9b294565
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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
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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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--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 9cd92ed44acfaa3b2ba04e345b33d21aff3d752c
This way we'll be able to take different paths for the sequential and parallel
traversals in some concrete cases.
This is a preliminar patch to fix bug 1332525.
r? @bholley
Source-Repo: https://github.com/servo/servo
Source-Revision: 1934a338757a84a6efddcbd3ecf051cd128a8d18
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Collect scroll roots during the collect_stacking_context phase instead
of during display list construction. This will be useful in order to
collect containing block scroll roots as well as to give scroll roots
sequential ids in the future. This change also pulls stacking context
children out of the StackingContext struct itself, which should reduce
very slightly the memory used by the finished display list. This also
simplifies the DisplayListBuilder because it no longer has to maintain
a stack of ScrollRootIds and StackingContextIds and can instead just
rely on the program stack.
Source-Repo: https://github.com/servo/servo
Source-Revision: dabb79c7878fce31b8b979dd5fcfdfb8713a9d80
With this PR, the only remaining usage of UnsafeNode is the transition stuff, which is servo-only and probably going to be rewritten over the course of stylo. The parallel traversal is now fully typechecked and safe. \o/
r? @emilio
Source-Repo: https://github.com/servo/servo
Source-Revision: b35ab98132539d4e6f1fcd4b3307eae40e387861
See the discussion in https://bugzilla.mozilla.org/show_bug.cgi?id=1323372
@emilio Please review, but don't merge yet until we get the upstream changes into Rayon.
CC @SimonSapin @heycam @upsuper @Manishearth @pcwalton @nikomatsakis
Source-Repo: https://github.com/servo/servo
Source-Revision: 8fd8d6161426af386c0dfd3d13968a409474eb16
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This PR removes the `util` crate.
* Replaced the `spawn_named` and `clamp` functions by appropriate uses of `std:🧵:Builder::spawn`, `std::cmp::min` and `std::cmp::max`.
* Moved `opts`, `prefs` and `resource_files` into a new `config` crate.
* Moved `remutex` and `geometry` into their own crates.
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Source-Revision: 4eb653817f87e5fb47de34356f558eb76ecbca9f
--HG--
rename : servo/components/util/Cargo.toml => servo/components/config/Cargo.toml
rename : servo/components/util/basedir.rs => servo/components/config/basedir.rs
rename : servo/components/util/lib.rs => servo/components/config/lib.rs
rename : servo/components/util/opts.rs => servo/components/config/opts.rs
rename : servo/components/util/prefs.rs => servo/components/config/prefs.rs
rename : servo/components/util/resource_files.rs => servo/components/config/resource_files.rs
rename : servo/components/util/geometry.rs => servo/components/geometry/lib.rs
rename : servo/components/util/remutex.rs => servo/components/remutex/lib.rs
rename : servo/tests/unit/util/lib.rs => servo/tests/unit/servo_config/lib.rs
rename : servo/tests/unit/util/opts.rs => servo/tests/unit/servo_config/opts.rs
rename : servo/tests/unit/util/prefs.rs => servo/tests/unit/servo_config/prefs.rs
rename : servo/tests/unit/util/remutex.rs => servo/tests/unit/servo_remutex/lib.rs
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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I think I got the numbers right, want to do a try run before just in case.
r? @SimonSapin
Source-Repo: https://github.com/servo/servo
Source-Revision: 2289ad53dd9a2666645b1f7eef07636e21c1607e
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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
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Don't promote all scrollable regions to stacking contexts
Instead annotate all flows with their owning ScrollRoots. When
processing the display list items into a flattened display list, we add
PushScrollRoot and PopScrollRoot to signal when scrolling regions start
and end. It is possible for content from different scrolling regions to
intersect and when they do, the stack of scrolling regions is
duplicated. When these duplicated scrolling regions stacks reach
WebRender, it will scroll them in tandem.
The PushScrollRoot and PopScrollRoot items are currently represented as
StackingContexts in WebRender, but eventually these will be replaced
with special WebRender display items.
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Source-Repo: https://github.com/servo/servo
Source-Revision: ef5ca14283f1f47654093b5c196ab813efb53ea8
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
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Source-Revision: 3a3f3192a87dbcd5d05efb82a1f4dde23f9c4cf7
--HG--
rename : servo/resources/shaders/box_shadow.fs.glsl => servo/resources/shaders/cs_box_shadow.fs.glsl
rename : servo/resources/shaders/ps_box_shadow.glsl => servo/resources/shaders/cs_box_shadow.glsl
This is a continuation of the work in #13951. I'm separating it out into a separate PR since the aforementioned patch has a green try run and this one doesn't yet.
Source-Repo: https://github.com/servo/servo
Source-Revision: b611e5c3b219e8f6aa9a7937aa7f5ea552762cd4
The patch here hoists pseudo-element handling onto ThreadSafeLayoutElement. I have another patch which hoists stuff from TNode to TElement, but want to make sure this patch passes try first.
Source-Repo: https://github.com/servo/servo
Source-Revision: e7b5891d9ccdb551a536937391c019e20b3911a4
This is part of the new incremental restyle architecture work. I have patches to element-ify things more, but want to get this in the tree first.
Source-Repo: https://github.com/servo/servo
Source-Revision: 87ef5487179a5b4c556361ad0c77c798b1edd4e1
This is another chunk of work to move us toward the new incremental restyle architecture.
Eventually, we'll make a fine-grained decision at each node about what style to recompute based on the RestyleHint on the node data (along with other things). For now, we use the existence of RestyleData as a coarse-grained approximation of this.
Source-Repo: https://github.com/servo/servo
Source-Revision: c8b6ece97b6eec8ac4e16a7a79a605356279cfb6
A couple of changes here:
* Remove the option to unset with the dirty bit settes.
* Add an explicit API for setting text node style.
* Hoist has_changed handling into the restyle damage setter and text node style setter.
* Make set_style take a non-Option.
Source-Repo: https://github.com/servo/servo
Source-Revision: 2e9aaa45dc548ceb3787e2e2ebc933dd232f3b97
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See the first commit's description for a bit of background. I'm making the PR in this state just to verify against try I've handled all cases of possibly incorrect sharing and, if not, fix it.
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r? @bholley
Source-Repo: https://github.com/servo/servo
Source-Revision: 1b2450339c40dbcb65e94a346ea434d45f0edf90
This removes the `[replace]` override in geckolib and therefore unblocks https://github.com/servo/servo/pull/12391.
This includes the `gecko_string_cache` redesign discussed in https://github.com/servo/servo/pull/12548.
r? @bholley
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Source-Revision: 5e83b3f83bfcf48d0096442bdf5c9bf753623970
This commit adds hooks to the Servo style traversal to avoid traversing all the
DOM for every restyle. Additionally it changes the behavior of the dirty flag to
be propagated top down, to prevent extra overhead when an element is dirtied.
This commit doesn't aim to change the behavior on Servo just yet, since Servo does extra job when dirtying the node related with DOM revision counters that might be necessary.
CC @asajeffrey for the DOM revision counters stuff. When a node is dirty, do all its descendants really need to increment the revision counter, or is this an unintended effect? My intuition is that this is hurting performance quite a lot for servo.
r? @bholley
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Source-Repo: https://github.com/servo/servo
Source-Revision: 944d371b8f0e72f6aa5465be38c0c8daeab66127
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
This marshaling is slow, because Gecko stores attributes as UTF-16 and does not atomize them in all cases, and it turns out that the need for them in Servo is pretty minimal. With some refactoring across servo and rust-selectors we can fix this.
Source-Repo: https://github.com/servo/servo
Source-Revision: abdf2f28a0bd25a76a31b4fd2410c7a87448ed54
Because this is a bottom-up traversal it can generates flows and throw them away. To prevent that, this cascades an internal `-servo-under-display-none` property and then checks that during flow construction. Fixes#1536.
r? @pcwalton
Source-Repo: https://github.com/servo/servo
Source-Revision: 92ae502765d8b6028db57c2d2ff5cda886ab9439
Partial implementation of the issue #10692 (the easy part).
Source-Repo: https://github.com/servo/servo
Source-Revision: d926b5d3762a101d5280266f806f2b979f73b695
The old code tried to do the speculation as a single bottom-up pass
after intrinsic inline-size calculation, which was unable to handle
cases like this:
<div>
<div style="float: left">Foo</div>
</div>
<div>
<div style="overflow: hidden">Bar</div>
</div>
No single bottom-up pass could possibly handle this case, because the
inline-size of the float flowing out of the "Foo" block could never make
it down to the "Bar" block, where it is needed for speculation.
On the pages I tried, this regresses layout performance by 1%-2%.
I first noticed this breaking some pages, like the Google SERPs, several
months ago.
r? @mbrubeck
Source-Repo: https://github.com/servo/servo
Source-Revision: 1554331f06900e69f246ed9986a08aae91a0a71e
This reduces CPU usage when mousing over simple pages (example.com). More complex pages (Wikipedia) still reflow a lot due to other bugs.
Additionally, this change causes Servo to stop painting the results of hit test queries. This is also a win for CPU usage.
This significantly improves #9999, though there's more that can be done. I'll leave it open in case @paulrouget thinks this PR isn't enough.
r? @mbrubeck
Source-Repo: https://github.com/servo/servo
Source-Revision: 9813d11f862a61a7cffb4cf2d7de0fa7d269c62a
Right now, the only reason that overflow calculation works is that we
rely on script inducing extra reflows that are sent for display. This
was preventing #10021 from landing.
This change regresses layout performance by about 1% in my tests.
Fixes#7797 properly.
r? @mbrubeck
cc @glennw
Source-Repo: https://github.com/servo/servo
Source-Revision: 8120fb5c2d170d5d9838696a7a5b871a43f57bb2
Right now, there's a huge amount of complexity in T{Node,Element,Document} and friends because of the lifetime parameter.
Before I started generalizing this code for use by Gecko, these wrappers were plain structs. They had (and still have) a phantom lifetime associated with them to prevent references to DOM nodes from leaking past the end of restyle, when they might be invalidated by a GC.
When I generalized them, I decided to put the lifetime on the trait as well, since there are some situations where the lifetime is, in fact, necessary. Specifically, they are necessary for the compiler to understand that all the things borrowed from all the nodes and elements and so on have the same lifetime (the lifetime of the restyle), rather than the lifetime of whichever particular element or node pointer the value was borrowed from. This come up in situations where we do |let el = node.as_element()| or |let n = el.as_node()| and then borrow something from the result. The compiler thinks the borrow lifetime is that of |el| or |n|, when it's actually longer.
In practice though, I think the style and layout algorithms we use don't run into this issue much, and we can hack around it where it comes up. So I think we should remove the lifetimes from the traits, which will let us aggregate the embedding-provided traits together onto a single meta-trait and significantly simplify the code.
Source-Repo: https://github.com/servo/servo
Source-Revision: aea8d8959dcb157a8cc381f1403246ce8ca1ca00
Flat display lists were a 2x regression on the spheres demo. This patch series fixes that.
See the individual commits for more details.
r? @mrobinson
Source-Repo: https://github.com/servo/servo
Source-Revision: 55fc48e4c46917a0f036d0054fac296bb5719434
Instead of producing a tree of stacking contexts, display list
generation now produces a flat list of display items and a tree of
stacking contexts. This will eventually allow display list construction
to produce and modify WebRender vertex buffers directly, removing the
overhead of display list conversion. This change also moves
layerization of the display list to the paint thread, since it isn't
currently useful for WebRender.
To accomplish this, display list generation now takes three passes of
the flow tree:
1. Calculation of absolute positions.
2. Collection of a tree of stacking contexts.
3. Creation of a list of display items.
After collection of display items, they are sorted based upon the index
of their parent stacking contexts and their position in CSS 2.1
Appendeix E stacking order.
This is a big change, but it actually simplifies display list generation.
Source-Repo: https://github.com/servo/servo
Source-Revision: 62814f7cb486bc267a796b7ce58c51d59240fad0
