Script: Implement TextDecoderStream (#38112)

This PR implements the `TextDecoderStream`. Other than introducing the
necessary mod and webidl files corresponding to `TextDecoderStream`,
this PR also involves some changes in `TextDecoder` and
`TrasnformStream`:

- The common part that can be shared between `TextDecoder` and
`TextDecoderStream` are extracted into a separate type
`script::dom::textdecodercommon::TextDecoderCommon`. This type could
probably use a different name because there is an interface called
`TextDecoderCommon` in the spec
(https://encoding.spec.whatwg.org/#textdecodercommon) which just gets
included in `TextDecoder` and `TextDecoderStream`.
- The three algorithms in `TransformStream` (`cancel`, `flush`, and
`transform`) all have become `enum` that has a `Js` variant for a JS
function object and a `Native` variant for a rust trait object. Whether
the cancel algorithm needs this enum type is debatable as I did not find
any interface in the spec that explicitly sets the cancel algorithm.

Testing: Existing WPT tests `tests/wpt/tests/encoding/stream` should be
sufficient
Fixes: #37723

---------

Signed-off-by: minghuaw <michael.wu1107@gmail.com>
Signed-off-by: minghuaw <wuminghua7@huawei.com>
Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>
This commit is contained in:
minghuaw 2025-07-29 12:18:15 +08:00 committed by GitHub
parent 25822920cf
commit 554b2da1ad
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25 changed files with 797 additions and 752 deletions

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@ -13725,14 +13725,14 @@
]
],
"interfaces.https.html": [
"641c5ba19d389390b7b51da7644f011b0c42f33a",
"efb780c382456b1fda514b33fe5b317c447fa09e",
[
null,
{}
]
],
"interfaces.worker.js": [
"463bfc25211014203a5094baae4b4e2d890bf9aa",
"a02605ff8e63db701c77d734037fcb33d76418d0",
[
"mozilla/interfaces.worker.html",
{}

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@ -326,6 +326,7 @@ test_interfaces([
"TextTrackCueList",
"TextTrackList",
"TextDecoder",
"TextDecoderStream",
"TextEncoder",
"TimeRanges",
"Touch",

View file

@ -110,6 +110,7 @@ test_interfaces([
"SecurityPolicyViolationEvent",
"ServiceWorkerContainer",
"TextDecoder",
"TextDecoderStream",
"TextEncoder",
"TrustedHTML",
"TrustedScript",