Replace iterator struct with anonymous return iterator type.
```
hi servo. it's been
some time. here's a pull request.
i hope you like it.
```
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Force HTMLStyleElement to create a new CSSStyleSheet when re-parsing.
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes do not require tests because I'm pushing to find out what test results this changes; this is part of a series of PRs to fix bug #17182
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Fix several bugs related to scrolling
* 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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return Option from GlobalScope::current
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handles the case where `GlobalScope::current` calls `CurrentGlobalOrNull` and the result is null
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We already call Document::invalidate_style_sheets and set
the stylesheet member to a new Stylesheet. This matches the behavior of
Firefox, and means the new CSSStyleSheet you get from accessing .sheet
from JS will be correct instead of stale.
(::get_cssom_stylesheet already tries to use the new Stylesheet, but
MutNullableJS::or_init is called, so if we already created a
CSSStyleSheet we will continue to return that one).
Remove target and data fields from parse_node_data
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`parse_node_data` does not need to store `data` and `target`, they can automatically be passed as parameters to the parser operation (`ParseOperation::CreatePI`) that we already create to be processed.
Also, this frees up `process_op` from depending on the sink's `parse_node_data` field, which will later allow for the sink to exist on the parser thread separately.
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Improve decisions in compositor over when to draw a frame.
This patch fixes a couple of issues in the compositor:
1) Remove the delayed composition code. Previously, this would schedule
a composite for 12ms in the future. This doesn't really make any sense
with WR. There's no point in doing a composite unless WR has provided
a new frame to be drawn. This fixes issues in several benchmarks where
we were doing multiple composite / renders per rAF, which is a waste
of CPU time. This *does* make the framerate slower in some cases (such
as a slow rAF callback) but it's more correct - otherwise we were just
compositing the same frame multiple times for no real benefit.
2) Inform the window of the current animation state of the compositor.
Specifically, if an animation (or rAF) is currently active, the
window system switches to use event polling, and does not block on
the OS-level event loop. In the case of active animation, we just
assume that we want to be running as the vsync interval and not
blocking. This means the compositor thread only sleeps on vsync
during animation, which reduces OS scheduling and results in much
smoother animation.
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This fixes another rAF bug, that is being exposed by the previous
two commits. Previously, the fake timer callback would only be
set if we were being called from a non-rAF event handler.
Now, if we're in fake / spurious mode, unconditionally set the one
shot timer.
Otherwise, notify the compositor that animations are present if
we're not currently in a rAF callback.
* 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.
Added Async HTML Tokenizer
Design: I realized having two different parsers for sync and async was wrong, because the API for both was fundamentally the same. All I needed to do was create another Tokenizer, because `ParseNode` ( representation for nodes which are yet to be created) is used by the TreeBuilder and the Sink, and the `Tokenizer` is the 'lowermost' type concerned with these two types.
Therefore, I created one and placed it in `async_html.rs`, and also created a new Sink which deals with `ParseNode`s. I changed the methods in ServoParser to take an `async` argument too, which decides which Tokenizer will be used. The Tokenizer isn't exactly *async* for now, but this PR separates action creation from execution, which allows the async behaviour to be implemented later. Right now, all actions are executed soon after they are created.
The Sink consists of two Hashmaps, `nodes`, which contains the actual nodes, with the key being their corresponding `ParseNode`'s id, and `parse_node_data`, which contains metadata about the nodes.
It's still a bit rough, (I can't figure out how to deal with `complete_script` and `is_mathml_annotation_xml_integration_point`, along with some other parts I wrote in a hurry), but I believe the overall design is sound. I'd like to hear what you think about it.
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Hold stderr lock when using stdout through Console APIs.
This addresses a longstanding source of intermittent test failures where the stderr and stdout outputs get interleaved and the test harness becomes confused.
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- [X] These changes fix#12797
- [X] There are tests for these changes
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WebIDL HTMLConstructor support
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spec: https://html.spec.whatwg.org/multipage/#htmlconstructor
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This commit also removes the old restyle_hints module and splits it into
multiple modules under components/style/invalidation/element/.
The basic approach is to walk down the tree using compound selectors as needed,
in order to do as little selector-matching as possible.
Bug: 1368240
MozReview-Commit-ID: 2YO8fKFygZI
