It's not very easy to understand on its current state, and it causes subtle bugs
like bug 1533654.
It could be simpler if we centralized where the interactions between properties
are handled. This patch does this.
This patch also changes how MathML script sizes are tracked when scriptlevel
changes and they have relative fonts in between.
With this patch, any explicitly specified font-size is treated the same (being a
scriptlevel boundary), regardless of whether it's either an absolute size, a
relative size, or a wide keyword.
Relative lengths always resolve relative to the constrained size, which allows
us to avoid the double font-size computation, and not give up on sanity with
keyword font-sizes.
I think given no other browser supports scriptlevel it seems like the right
trade-off.
Differential Revision: https://phabricator.services.mozilla.com/D23070
This is the low-risk fix for this issue, that we should get into 67.
What's going on here is that font-family is tracked via the font list, from the
POV of the style system the font list is generally just the
RefPtr<SharedFontList>, but in Gecko there's also mDefaultGenericId.
The way we end up with the right mDefaultGenericId is fishy at best, bogus at
worst. I left various fixmes over time related to a bunch of this code.
After my patch, we end up with a mDefaultGenericId of serif, rather than the
right one (none).
The parent font always has none because nsLayoutUtils::ComputeSystemFont always
sets it to none if the font is known.
Before my patch, PrefillDefaultForGeneric with aGenericId of none (from the
parent), which makes it the default generic id for the current language, serif
in this case.
Before my optimization, apply_declaration_ignoring_phase called
copy_font_family_from, which resets both the font list _and_ the default
generic.
This patch achieves the same effect by not having the first mutation in the
first place.
This code is still terribly fishy in any case, all the _skip_font_family stuff
is just ridiculous. I'll try to clean up a bit after this, but for 68.
Differential Revision: https://phabricator.services.mozilla.com/D23026
This should unblock the fuzzers for now, though it's not the ideal solution.
It's the only reasonably easy solution to unblock them though, I think.
We should probably always keep track of the document a stylesheet was associated
with. We'll need that for constructible stylesheets anyway.
That requires some though on how to get the cycle-collection and such right,
though, and I wouldn't be able to write or land that ASAP.
Differential Revision: https://phabricator.services.mozilla.com/D23584
Properly support transforms in WebXR
Still need to test this
There are also a bunch of fixmes that I should get to in this PR.
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Add a sampling profiler
This uses the code already built for the background hang monitor and adds the ability to repeatedly sample all monitored threads. This sampling allows us to generate profiles that we can translate into the format used by https://perf-html.io/, allowing us to benefit from modern Gecko performance tooling.
You can run Servo with `PROFILE_OUTPUT=foo.json` and `SAMPLING_RATE=50` (for example), otherwise these values will default to `samples.json` and 10ms, respectively. To activate the profiler, press cmd+p, and to stop profiling, press cmd+p again. This will the captured samples to be symbolicated, which will take a very long time, and eventually there will be a new JSON profile in the output location.
To create a profile for use by Gecko's tools, run `python etc/profilicate.py path/to/profile.json >gecko_profile.json`, and load `gecko_profile.json` in the https://perf-html.io/ to see something like [this](https://profiler.firefox.com/public/8137e2b11fbb92afb80090bc534fd83015c87ee6/calltree/?globalTrackOrder=0-1&thread=1&v=3);
---
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- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#13103
- [x] These changes do not require tests because way too many pieces to automate
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Use mozjs profiling feature when building with frame pointer enabled
This makes it possible to get more meaningful profiles with #23080.
---
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- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix part of #23081
- [x] There are no tests for these changes
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Update Event's timestamp
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---
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- [X] These changes fix#22885
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Defer update of dom_content_loaded_event_end
Set it's value only after the "DOMContentLoaded" event is really fired
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- [X] These changes fix#22994
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Fix bleeding in FxR by adding Padding support to ServoSurface
Not ready for review, just need to make sure the CI is happy for now.
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Add tokenizer for features in window.open
<!-- Please describe your changes on the following line: -->
This is a prototype implementation of feature tokenizer ~~and "noreferrer" feature~~ for window.open. I'm not very sure where the tokenizer code should be placed. Building now generates the following warning
```
warning: unused attribute
--> components/script/dom/bindings/conversions.rs:74:5
|
74 | rustc_on_unimplemented(message = "The IDL interface `{Self}` is not derived from `{T}`.")
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: #[warn(unused_attributes)] on by default
```
---
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- [X] These changes _partially_ fix#22869 (GitHub issue number if applicable)
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Expose public getter to stylesheet's owner
<!-- Please describe your changes on the following line: -->
- [x] expose a public getter on CSSStyleSheet to return the stylesheet's owner
- [x] in CSSRuleList::insert_rule, use the new getter to pass a non-None value as an argument to arc.insert_rule
- [x] add a test for this that verifies that the new stylesheet is actually loaded
---
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- [x] These changes fix#23028
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#23065 removed unnecessary headless checking
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---
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- [x] These changes fix#23065 (GitHub issue number if applicable)
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- [x] There are tests for these changes (it's wpt tests, isn't it?)
- [ ] These changes do not require tests because _____
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