Make CanvasRenderingContext2D.createPattern() return null for incomplete images
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`createPattern()` should return `null` if the passed `image` argument is not usable.
References:
- https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-createpattern
- https://html.spec.whatwg.org/multipage/canvas.html#check-the-usability-of-the-image-argument
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Improve position:fixed support in layout_2020
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This makes it so that position:fixed elements do not scroll with the
rest of the contents, but does not tackle the rest of the issues with
their positioning.
Make HTMLFormControlsCollection rooted at the form's root, not rooted at the form itself
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We'd been misreading the first line of https://html.spec.whatwg.org/#dom-form-elements. The collection needs to be rooted higher than the form itself, so it can contain form controls elsewhere in the document with a form= content attribute. It is, as far as I can tell, unspecified whether "rooted at the form's root" is meant to live-update to a new root if the form is moved to another tree, and I'm assuming it doesn't have to.
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Add usability checks to CanvasRenderingContext2D.drawImage()
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These changes add the usability checks performed on an image to be drawn to the canvas.
References:
- https://html.spec.whatwg.org/multipage/canvas.html#drawing-images
- https://html.spec.whatwg.org/multipage/canvas.html#check-the-usability-of-the-image-argument
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Let EventSource fail fast on bad schemes
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EventSource went into an infinite reconnect loop in some cases where tests wanted it to go into a hard error state; this addresses the cases where that happens because the url isn't even http(s) and will thus definitely never result in an event stream.
https://github.com/web-platform-tests/wpt/issues/4311 suggests the tests might just be too picky here; the spec does use the word "may" on relevant behavior.
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Expose DOMHighResTimeStamps at lower res
As explained in https://www.w3.org/TR/hr-time-2/#clock-resolution and tested in a few WPT tests, we're not supposed to show Javascript the full resolution of OS timestamps. This fixes that on all the DOMHighResTimeStamp interfaces that weren't already limiting themselves to integer milliseconds.
The specific choice of how to coarsen the resolution is extremely bikesheddable; I commented the reasoning for my arbitrary choice but I admit it's arbitrary.
A couple tests of timing resolution still fail, but because they're seeing undefined and NaN values due to unimplemented attributes (#25658).
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Fix timeout vs. task-queue race conditions in promise rejection tests
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These two tests were assuming that timeouts and promise rejection events would have a temporal relationship not actually guaranteed by spec, leading to test timeouts if the DOM manipulation task queue was running slower than anticipated.
fix#22207, fix#22295
Of course, the upstream WPT results need looking at to be sure this hasn't done something weird to another browser.
Add support for overflow:scroll and overflow:hidden to layout_2020
This adds clipping and interactive scrolling support, but scrolling from
script is still not functional.
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Do not include request progress/total values on XHR timeout
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Do not include request progress/total values on XHR timeout as [the specification]( https://xhr.spec.whatwg.org/#request-error-steps) states that upload events when errors occur should always pass 0 for both values.
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Kill off hanging crashtests.
The reason that complex-glsl-does-not-crash.html kept leaving zombie processes is the following:
* WPT introduced the notion of crash tests (ie. tests that verify that they do not crash)
* if a timeout expires while running a crash test and the test has not finished running, it is reported as a failure and potential hang
* there is no code that causes a hanging test to stop running
* any test filename that ends in `-crash` is automatically treated as a crashtest
Implement SubmitEvent
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FormSubmitter was already being passed into submit, so there wasn't much work to do here other than making the new event interface itself.
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fix DOMTokenList
I fixed the bug described in 25128, and also the other cases in the same test (order of elements after replace).
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Implement :defined CSS selector
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ElementState::IN_DEFINED_STATE already existed but wasn't hooked up to anything; now it is set appropriately, and CSS is aware of it. The main test for this selector needed the window named getter for no important reason, so I made a one-line test change to avoid that. Remaining failures in the test are all about SVG elements.
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Make nulling out an inline event handler remove it from the list order
Setting a content attribute or IDL attribute to null now removes event handlers like it's supposed to; the removeAttribute case seems to be something deeper which this change doesn't fix.
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Accept UTF8 cookie header values
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HeaderValue::to_str only works on ASCII; cookies can be utf8 too, so we decode accordingly.
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- [ ] There are tests for these changes in http_loader; I don't know whether websocket cookies have tests.
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Enable Mozilla CSS tests for layout_2020 and add expectations
This change allows mach to run the Mozilla CSS tests when running with the ``--layout2020` argument. This is useful because we can mark tests as passing as features are added.
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Implement URLMismatchError
Nothing in current specifications actually throws this DOMException type, but the type exists in specs nonetheless, and adding it lets us check off a WPT test.
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Make error events only pass the extra error-event arguments to global listeners
Error event handlers were getting lineno, etc. arguments even when they weren't on globals, failing two WPT tests; this fixes that.
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