Various webxr WPT fixes
Needs https://github.com/servo/webxr/pull/108
r? @asajeffrey
Went through most of the failing tests and fixed them. Many of the remaining ones fail due to unsupported features that I can slowly whittle away.
Increase parallelism on Linux WPT testing
The time taken by each chunk is uneven, with WPT-1 the longest before this change at 30 ~ 45 minutes. This reduces it to 15 ~ 20 minutes.
Surprisingly, increasing the number of processes seems to also make `test_element_in_collection` in `/webdriver/tests/execute_script/cyclic.py` **unexpectedly pass**. This happened reliably in three different runs:
https://community-tc.services.mozilla.com/tasks/S9O27WJvSa6j2PSjcRcbBA/runs/2
implement composition event creation in Document.createEvent
Solved the problem mentioned in https://github.com/servo/servo/issues/24724#issuecomment-562326328
Add logic to create composition event for Document.createEvent. This resolved some WPT test failure, so updated the metadata as well
Ref: https://developer.mozilla.org/en-US/docs/Web/API/Document/createEvent
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Make `mach test-tidy --no-wpt` compatible with Python3
Make `mach test-tidy --no-wpt` compatible with Python3
See also #23607
After this pull request, all python files (except WPT) will be checked for Python3 syntax compatibility.
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adding .isConnected DOM attribute
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is_connected already existed for this concept and just needed to be hooked up to an IDL attribute.
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Took out the special mouseover cancel case
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eventtarget.rs was checking the event type to see if it was a mouseover; now it doesn't. Other special-case events like error and beforeunload go down other code paths entirely, so this one has no special cases left.
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The time taken by each chunk is uneven, with WPT-1 the longest
before this change at 30~45 minutes. This reduces it to 15~20 minutes.
Surprisingly, increasing the number of processes seems to also make
`test_element_in_collection` in `/webdriver/tests/execute_script/cyclic.py`
**unexpectedly pass**. This happened reliably in three different runs:
https://community-tc.services.mozilla.com/tasks/S9O27WJvSa6j2PSjcRcbBA/runs/2
hidden field named _charset_ now appears in FormData as UTF-8
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HTMLInputElement now has special case logic for putting a hidden field named `_charset_` in an entry set. To support this, the encoding used when constructing a form dataset is now being passed further down the callchain than it was before.
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Add onformdata to GlobalEventHandlers
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1. Adding `onformdata` to GlobalEventHandlers interface and global_event_handlers macro.
2. Deleting related FAIL tests.
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Fix "Tried to use SpatialId before it was defined" layout panic
In the case where an element uses `text-overflow: ellipsis` and causes overflow, we create a TruncatedFragment that wraps the original overflowing fragment. When collecting stacking contexts for the truncated fragment, https://github.com/servo/servo/pull/18510 addressed the case where the wrapped fragment wouldn't be processed, but neglected the case where that fragment ends up creating a new stacking context. When that happens, the TruncatedFragment would be stuck with the updated scrolling/clipping information based on the new stacking context, but it would be a child of the parent stacking context. Since the new scrolling/clipping nodes do not exist in the display list until the new stacking context display item is created, this led to the observed panic.
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Support OffscreenCanvas as CanvasImageSource
Added methods to canvas_data to support drawing an offscreen canvas onto another canvas
Bug fix: Swapped OffscreenCanvas width and height parameters to match Mozilla spec
Tests: Updated metadata for 866 tests
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Added methods to canvas_data to support drawing an offscreen canvas onto another canvas
Bug fix: Swapped OffscreenCanvas width and height parameters to match Mozilla spec
Tests: Updated metadata for 866 tests
Add StreamConsumer wrapper and methods to response
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Add Streamconsumer wrapper to Response
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Improve diagnostics for WPT failures
* Include the full output (including stdout/stderr) in the intermittent-filtered log
* Print the intermittent-filtered log at the end of the main log (which is one less click to reach from Taskcluster’s task view, compared to other task artifacts)
* <del>Fail with a specific message when a reftest screenshot is entirely white</del> (This caused over a hundred unexpected results. A few of them in reftests that use `about:blank` as a reference.)
* For failing reftests, add a message if the whole screenshot is a solid color, to help recognize instances of https://github.com/servo/servo/issues/24726
```
▶ FAIL [expected PASS] /css/CSS2/box-display/root-box-003.xht
│ → /css/CSS2/box-display/root-box-003.xht 54a9df64f1476dd12020019d7cf22ac34d727bc0
│ → /css/CSS2/box-display/root-box-003-ref.xht 636eb693bc214b6e1c64e6566c48e69e6777b946
└ → Screenshot is solid color 0xFFFFFF for /css/CSS2/box-display/root-box-003.xht
```
(The last line is new.)
Issue 21810/improve validation methods
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This is a start at addressing #21810. I'm putting these changes out early to get some feedback on the following items:
1. I added unit tests for the validation methods mentioned in #21810, because I couldn't tell whether any of the existing WPT tests covered them. Are these tests worthwhile? Are any of them unnecessary?
2. I changed the implementation for `is_valid_floating_point_number_string` so that it passed the tests. The previous version of the function wasn't restrictive enough (it allowed certain whitespace characters before the number string).
3. I changed the catch-all condition in `htmlinputelement.rs` to account for the remaining input types that don't have a value sanitization algorithm. This last change seems good to me since we won't be able to add a new input type without adding it to the case and checking the spec for an algorithm.
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Implement mediasession set positon state
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fix#24808
> Bonus points if you want to tweak the existing UI by adding a progress bar, and the info about the current position and total duration.
I haven't implemented this yet.
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