Preliminary WebXR support
This implements just enough WebXR to display to 3DOF devices in
immersive mode only.
Couple missing things:
- [ ] Handling reference spaces (even if just supporting eye-level spaces)
- [x] Spec links
- [ ] We enter immersive mode when baseLayer is set, but it seems like
we're supposed to do this when requestSession is called (https://github.com/immersive-web/webxr/issues/453)
- [ ] VR/XR should block less (https://github.com/servo/servo/issues/22505)
- [x] More pref-gating
- [x] `views` is a method instead of an attribute because we don't support FrozenArray
<s>Once I add spec links and pref gating</s> this can be landed as-is for further experimentation.
r? @jdm @MortimerGoro
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Construct URLSearchParams from array or object
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- [x] These changes fix#22554, fix#22556 and also fix#22557
- [x] There are tests in `url/urlsearchparams-constructor.any.js` for these changes
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Remove sync constellation -> embedder communication
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Update ServiceWorker webidl
About the `void postMessage`, I found the spec doesn't have `[Throws]`; however, as the implementation for `postMessage` in spec, we should have `[Throws]` for it because it will throw errors. Then, I realized that `[Throws]` is not part of standard webidl. Btw, there's a issue discussing about if `[Throws]` should be standardized or not at heycam/webidl#603.
Also, per the spec, `ServiceWorker` will `includes` `AbstractWorker` instead of `implements` so I filed #22539 for it. We can update it after the issue is fixed.
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- [x] These changes fix part of #19302
- [x] These changes do not require tests because it just updates the webidl and the changes should have no impact to current implementation.
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Update ServiceWorkerContainer Webidl
Looks like the spec has changed a lot. Maybe it's better to update the implementation for these methods in a separate PR.
Let's just update webidl in this PR?
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Instead of per-document. This also allows to reuse this thread-pool if needed
for other stuff, like parallel CSS parsing (#22478), and to share more code with
Gecko, which is always nice.
#22484 small cleanup
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Fixed bug in textinput::adjust_vertical concerning selection_origin
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The `adjust_vertical` function of the `TextInput` module was forgetting to update the `selection_origin`.
I discovered the bug and figured out how it fix it using formal verification. More precisely, I manually translated the Rust code in a [F*](https://www.fstar-lang.org/) program that was functionally equivalent. Then I used the `assert_ok_selection` as a post-condition on the following functions :
* `select_all`
* `clear_selection`
* `adjust_selection_for_horizontal_change`
* `clear_selection_to_limit`
* `adjust_vertical`
* `perform_horizontal_adjustment`
* `adjust_horizontal`
* `adjust_horizontal_to_line_end`
I managed to prove automatically (using the Z3 backend of F*) that the post-condition held for all the functions except for `adjust_vertical`. I used the error messages from F* to infer the missing code so that the postcondition could hold and manually translated it to this PR diff.
I also added a simple unit test that would fail without this patch, and observed that the assertion failures noted in https://github.com/servo/servo/issues/22457 disappeared with this patch.
This verification work also allows me to say that the code of all the functions is now functionally correct in the sense that they all yield a valid selection in the sense of `asssert_ok_selection`, in all cases.
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Remove `foreign` service-workers mode
Bringing in the spec changes from whatwg/fetch#596
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