Make Request throw less often (fixes#13457)
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In support of this goal, the layout thread collects information about
CSS images that are missing image data and hands it off to the script
thread after layout completes. The script thread stores a list of
nodes that will need to be reflowed after the associated network
request is complete. The script thread ensures that the nodes are
not GCed while a request is ongoing, which the layout thread is
incapable of guaranteeing.
The image cache's API has also been redesigned in support of this
work. No network requests are made by the new image cache, since it
does not possess the document-specific information necessary to
initiate them. Instead, there is now a single, synchronous
query operation that optionally reserves a slot when a cache
entry for a URL cannot be found. This reserved slot is then
the responsibility of the queryer to populate with the contents
of the network response for the URL once it is complete. Any
subsequent queries for the same URL will be informed that the
response is pending until that occurs.
The changes to layout also remove the synchronous image loading
code path, which means that reftests now test the same code
that non-test binaries execute. The decision to take a screenshot
now considers whether there are any outstanding image
requests for layout in order to avoid intermittent failures in
reftests that use CSS images.
Cleanup arraybufferview type
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Replace uses of spidermonkey-specific JS_GetArrayBufferViewType with ArrayBufferView impl's method get_array_type().
Tests pass:
./mach test-wpt tests/wpt/web-platform-tests/WebCrypto
./mach test-wpt tests/wpt/web-platform-tests/webgl
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Eliminate a mem::transmute in CodeGen
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Eliminate a mem::transmute in CodeGen by changing the find_enum_string_index function to take a slice of pairs and return an enum value.
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Sometimes clippy gets outdated by months, and its current support setup
means that each Servo component need to opt into it by depending on
the plugins crate manually, and not all components do that.
Remove ArrayBufferViewContents trait
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Removed ArrayBufferViewContents trait and dependent uses.
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Calling matchMedia during a MQL change event will not panic
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Calling matchMedia now leads to a new copy of MQL objects to prevent errors when borrowing references from MQL during an MQL change event.
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Allow browsing contexts to resolve to cross-origin windows
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This PR implements cross-thread `WindowProxy` objects.
At the moment, if a `Window` performs a non-similar-origin navigation, the old script thread does not update its `WindowProxy`, since the new `Window` is in the new script thread. With this PR, the `WindowProxy` is updated to a dummy `XOriginWindow` object, that only implements the whitelisted methods that are allowed to be called cross-origin.
This PR does not include working implementations of some of the cross-origin `Window` or `Location` methods.
This PR causes some cross-origin wpt tests to now pass, in particular `/html/browsers/origin/cross-origin-objects/cross-origin-objects.html ` now passes `Only whitelisted properties are accessible cross-origin`. There are some CORS failures in `fetch`, I suspect caused by the incorrect setting of `origin` in fetch requests.
Although there are some functions that now throw `SecurityException`, it is not meant to be a complete implementation, which will have to wait for XOWs to land.
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