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dom: Implement WritableStream (#34844)
* add basic interface for writable stream Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * add stubs for pipeTo and pipeThrough methods Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * add stubs for writable stream defautl writer Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * add stubs for writable stream controller Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * add underlying source dict Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * add underlying source dict Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement constructor Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement init writable stream Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * impl setup default controller Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement controller setup Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement controller advance queue if neededd Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream finish erroring Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream reject close and closed promise if needed Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * finish implementation of stream finish erroring Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * call into controller setup from stream constructor Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream mark first write request in flight Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement controller process write Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * call into advance queue if needed at various points Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream deal with rejection, use from_safe_context Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement controller clear algorithms Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove unused todo Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream start erroring Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * finish writer ensure ready promise rejected Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream finish in flight write request Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement write constructor and setup Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement controller error Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove unnecessary unsafe code Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * finish implementing process write Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement close sentinel Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement public locked Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream abort Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream close Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement controller close Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix use of crown Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove unnecessary options around writer promises Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement writer get desired size Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement writer ready Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement writer abort Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement writer close Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement writer release lock Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement writer public write Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement private writer write Uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement writer release. Uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * impl controller process close Uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * finish controller process close Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * root promise handlers Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * handler errors in stream and writer constructor finish implementation of stream finish in flight close Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix warnings Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement controller get chunk size Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * tidy the webidls Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * implement stream get writer Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix assertion of stream state when advancing queue if needed Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * add docs for value with size Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * use reject_error in abort Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove unnecessary allowances of unsafe code Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * turn writable-streams test suite on Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * update encodings test expectations Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * properly check if type is set on sink in stream constructor Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix double borrow in controller advance queue if needed Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * make the queue aware of the close sentinel when dequeuing a value Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix assertion of no backpressure in update backpressure Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * also clear strategy size when clearing algorithms Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove this object arg when calling into strategy size Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix has operations marked in flight Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix typo in has in flight write request Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * turn error into no-op when aborting a stream, if the stream is closed or errored. Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix error handling of calling into abort algorithm Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix error handling of calling into close and write algorithms Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix double borrow on queue fix logic in update_backpressure fix logic in get_desired_size fix logic in writer setup Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * update test expectations for aborting suite Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix controller get_backpressure Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix clippy Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * update test expectations to expect errors in tests using unsupported apis Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix error handling of calling into start algo in controller setup Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * update test expectations for test checking for undefined this in strategy size call Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * update test expectation to timeout for response-stream-with-broken-then.any.worker Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * update interfaces Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix use of global() and error to_jsval Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix use of crown for promise handlers Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove fail expectation from worker interface objects test Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove fail expectation for test expecting this to be undefined in callback Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix documentation link for writablestream state Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * refactor write_requests to use a vec deque uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove unnecessary doc Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * refactor reject_close_and_closed_promise_if_needed to take a safe js context as argument uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * pass globals and contexts by ref where possible uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix doc link for controller Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove unnecessary comment Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * change update_backpressure to be a method of the writablestream uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * rename writer method that resolve closed and ready promise for clarity uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * add comments for steps in peek queue value Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix doc link for the abort algorihtm fulfillment handler Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix step doc and variable name in abort algo rejection handler Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * Add must_root to pending abort request Co-authored-by: Josh Matthews <josh@joshmatthews.net> Signed-off-by: Gregory Terzian <2792687+gterzian@users.noreply.github.com> * limit visibility to crate for has_operations_marked_inflight Co-authored-by: Josh Matthews <josh@joshmatthews.net> Signed-off-by: Gregory Terzian <2792687+gterzian@users.noreply.github.com> * limit visibility to crate for get_stored_error Co-authored-by: Josh Matthews <josh@joshmatthews.net> Signed-off-by: Gregory Terzian <2792687+gterzian@users.noreply.github.com> * remove potention re-borrow risk in reject loop on write requests in finish_erroring Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove potential re-borrow risk when taking pending abort request in finish_erroring Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove potential re-borrow risk when taking close request in reject_close_and_closed_promise_if_needed Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove re-borrow risks in finish_in_flight_close Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove re-borrow risk on in_flight_close_request in finish_in_flight_close_with_error Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove unnecessary clone of of reason in abort Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix condition on backpressure and a writable state in close Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * limit visibility to crate for update_backpressure Co-authored-by: Josh Matthews <josh@joshmatthews.net> Signed-off-by: Gregory Terzian <2792687+gterzian@users.noreply.github.com> * remove mutability of reason in abort workflow Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove unnecessary use of ignore_malloc_size_of around Dom in controller Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix ignore malloc size of comment for strategy size Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * reduce visibility of public methods to crate in controller Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * remove use of JS_GetPendingException in controller get_chunk_size Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * return early on error in write Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * use is_some_and in assertion that stream.witer is writer in release Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * root pending abort request uses ai Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> * fix mutable re-borrow risk in writer Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> --------- Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com> Signed-off-by: Gregory Terzian <2792687+gterzian@users.noreply.github.com> Co-authored-by: Josh Matthews <josh@joshmatthews.net>
This commit is contained in:
Gregory Terzian
GitHub
parent
720bc725b0
commit
df6d636168
33 changed files with 2914 additions and 19 deletions
829
components/script/dom/writablestreamdefaultcontroller.rs
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components/script/dom/writablestreamdefaultcontroller.rs
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use std::cell::{Cell, RefCell};
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use std::ptr;
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use std::rc::Rc;
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use dom_struct::dom_struct;
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use js::jsapi::{Heap, IsPromiseObject, JSObject};
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use js::jsval::{JSVal, UndefinedValue};
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use js::rust::{HandleObject as SafeHandleObject, HandleValue as SafeHandleValue, IntoHandle};
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use super::bindings::codegen::Bindings::QueuingStrategyBinding::QueuingStrategySize;
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use crate::dom::bindings::callback::ExceptionHandling;
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use crate::dom::bindings::codegen::Bindings::UnderlyingSinkBinding::{
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UnderlyingSink, UnderlyingSinkAbortCallback, UnderlyingSinkCloseCallback,
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UnderlyingSinkStartCallback, UnderlyingSinkWriteCallback,
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};
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use crate::dom::bindings::codegen::Bindings::WritableStreamDefaultControllerBinding::WritableStreamDefaultControllerMethods;
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use crate::dom::bindings::error::Error;
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use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
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use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
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use crate::dom::globalscope::GlobalScope;
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use crate::dom::promise::Promise;
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use crate::dom::promisenativehandler::{Callback, PromiseNativeHandler};
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use crate::dom::readablestreamdefaultcontroller::{EnqueuedValue, QueueWithSizes, ValueWithSize};
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use crate::dom::writablestream::WritableStream;
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use crate::realms::{enter_realm, InRealm};
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use crate::script_runtime::{CanGc, JSContext as SafeJSContext};
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impl js::gc::Rootable for CloseAlgorithmFulfillmentHandler {}
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/// The fulfillment handler for
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/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-process-close>
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#[derive(Clone, JSTraceable, MallocSizeOf)]
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#[cfg_attr(crown, crown::unrooted_must_root_lint::must_root)]
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struct CloseAlgorithmFulfillmentHandler {
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stream: Dom<WritableStream>,
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}
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impl Callback for CloseAlgorithmFulfillmentHandler {
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fn callback(&self, cx: SafeJSContext, _v: SafeHandleValue, _realm: InRealm, _can_gc: CanGc) {
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let stream = self.stream.as_rooted();
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// Perform ! WritableStreamFinishInFlightClose(stream).
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stream.finish_in_flight_close(cx);
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}
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}
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impl js::gc::Rootable for CloseAlgorithmRejectionHandler {}
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/// The rejection handler for
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/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-process-close>
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#[derive(Clone, JSTraceable, MallocSizeOf)]
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#[cfg_attr(crown, crown::unrooted_must_root_lint::must_root)]
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struct CloseAlgorithmRejectionHandler {
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stream: Dom<WritableStream>,
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}
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impl Callback for CloseAlgorithmRejectionHandler {
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fn callback(&self, cx: SafeJSContext, v: SafeHandleValue, realm: InRealm, can_gc: CanGc) {
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let stream = self.stream.as_rooted();
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let global = GlobalScope::from_safe_context(cx, realm);
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// Perform ! WritableStreamFinishInFlightCloseWithError(stream, reason).
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stream.finish_in_flight_close_with_error(cx, &global, v, can_gc);
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}
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}
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impl js::gc::Rootable for StartAlgorithmFulfillmentHandler {}
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/// The fulfillment handler for
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/// <https://streams.spec.whatwg.org/#set-up-writable-stream-default-controller>
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#[derive(Clone, JSTraceable, MallocSizeOf)]
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#[cfg_attr(crown, crown::unrooted_must_root_lint::must_root)]
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struct StartAlgorithmFulfillmentHandler {
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controller: Dom<WritableStreamDefaultController>,
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}
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impl Callback for StartAlgorithmFulfillmentHandler {
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/// Continuation of <https://streams.spec.whatwg.org/#set-up-writable-stream-default-controller>
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/// Upon fulfillment of startPromise,
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fn callback(&self, cx: SafeJSContext, _v: SafeHandleValue, realm: InRealm, can_gc: CanGc) {
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let controller = self.controller.as_rooted();
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let stream = controller
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.stream
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.get()
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.expect("Controller should have a stream.");
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// Assert: stream.[[state]] is "writable" or "erroring".
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assert!(stream.is_erroring() || stream.is_writable());
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// Set controller.[[started]] to true.
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controller.started.set(true);
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let global = GlobalScope::from_safe_context(cx, realm);
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// Perform ! WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller).
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controller.advance_queue_if_needed(cx, &global, can_gc)
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}
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}
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impl js::gc::Rootable for StartAlgorithmRejectionHandler {}
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/// The rejection handler for
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/// <https://streams.spec.whatwg.org/#set-up-writable-stream-default-controller>
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#[derive(Clone, JSTraceable, MallocSizeOf)]
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#[cfg_attr(crown, crown::unrooted_must_root_lint::must_root)]
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struct StartAlgorithmRejectionHandler {
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controller: Dom<WritableStreamDefaultController>,
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}
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impl Callback for StartAlgorithmRejectionHandler {
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/// Continuation of <https://streams.spec.whatwg.org/#set-up-writable-stream-default-controller>
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/// Upon rejection of startPromise with reason r,
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fn callback(&self, cx: SafeJSContext, v: SafeHandleValue, realm: InRealm, can_gc: CanGc) {
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let controller = self.controller.as_rooted();
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let stream = controller
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.stream
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.get()
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.expect("Controller should have a stream.");
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// Assert: stream.[[state]] is "writable" or "erroring".
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assert!(stream.is_erroring() || stream.is_writable());
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// Set controller.[[started]] to true.
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controller.started.set(true);
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let global = GlobalScope::from_safe_context(cx, realm);
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// Perform ! WritableStreamDealWithRejection(stream, r).
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stream.deal_with_rejection(cx, &global, v, can_gc);
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}
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}
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impl js::gc::Rootable for WriteAlgorithmFulfillmentHandler {}
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/// The fulfillment handler for
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/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-process-write>
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#[derive(Clone, JSTraceable, MallocSizeOf)]
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#[cfg_attr(crown, crown::unrooted_must_root_lint::must_root)]
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struct WriteAlgorithmFulfillmentHandler {
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controller: Dom<WritableStreamDefaultController>,
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}
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impl Callback for WriteAlgorithmFulfillmentHandler {
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fn callback(&self, cx: SafeJSContext, _v: SafeHandleValue, realm: InRealm, can_gc: CanGc) {
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let controller = self.controller.as_rooted();
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let stream = controller
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.stream
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.get()
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.expect("Controller should have a stream.");
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// Perform ! WritableStreamFinishInFlightWrite(stream).
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stream.finish_in_flight_write();
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// Let state be stream.[[state]].
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// Assert: state is "writable" or "erroring".
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assert!(stream.is_erroring() || stream.is_writable());
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// Perform ! DequeueValue(controller).
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{
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rooted!(in(*cx) let mut rval = UndefinedValue());
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let mut queue = controller.queue.borrow_mut();
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queue.dequeue_value(cx, Some(rval.handle_mut()));
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}
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let global = GlobalScope::from_safe_context(cx, realm);
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// If ! WritableStreamCloseQueuedOrInFlight(stream) is false and state is "writable",
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if !stream.close_queued_or_in_flight() && stream.is_writable() {
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// Let backpressure be ! WritableStreamDefaultControllerGetBackpressure(controller).
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let backpressure = controller.get_backpressure();
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// Perform ! WritableStreamUpdateBackpressure(stream, backpressure).
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stream.update_backpressure(backpressure, &global, can_gc);
|
||||
}
|
||||
|
||||
// Perform ! WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller).
|
||||
controller.advance_queue_if_needed(cx, &global, can_gc)
|
||||
}
|
||||
}
|
||||
|
||||
impl js::gc::Rootable for WriteAlgorithmRejectionHandler {}
|
||||
|
||||
/// The rejection handler for
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-process-write>
|
||||
#[derive(Clone, JSTraceable, MallocSizeOf)]
|
||||
#[cfg_attr(crown, crown::unrooted_must_root_lint::must_root)]
|
||||
struct WriteAlgorithmRejectionHandler {
|
||||
controller: Dom<WritableStreamDefaultController>,
|
||||
}
|
||||
|
||||
impl Callback for WriteAlgorithmRejectionHandler {
|
||||
fn callback(&self, cx: SafeJSContext, v: SafeHandleValue, realm: InRealm, can_gc: CanGc) {
|
||||
let controller = self.controller.as_rooted();
|
||||
let stream = controller
|
||||
.stream
|
||||
.get()
|
||||
.expect("Controller should have a stream.");
|
||||
|
||||
// If stream.[[state]] is "writable",
|
||||
if stream.is_writable() {
|
||||
// perform ! WritableStreamDefaultControllerClearAlgorithms(controller).
|
||||
controller.clear_algorithms();
|
||||
}
|
||||
|
||||
let global = GlobalScope::from_safe_context(cx, realm);
|
||||
|
||||
// Perform ! WritableStreamFinishInFlightWriteWithError(stream, reason).
|
||||
stream.finish_in_flight_write_with_error(cx, &global, v, can_gc);
|
||||
}
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#ws-default-controller-class>
|
||||
#[dom_struct]
|
||||
pub struct WritableStreamDefaultController {
|
||||
reflector_: Reflector,
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writablestreamdefaultcontroller-abortalgorithm>
|
||||
#[ignore_malloc_size_of = "Rc is hard"]
|
||||
abort: RefCell<Option<Rc<UnderlyingSinkAbortCallback>>>,
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writablestreamdefaultcontroller-closealgorithm>
|
||||
#[ignore_malloc_size_of = "Rc is hard"]
|
||||
close: RefCell<Option<Rc<UnderlyingSinkCloseCallback>>>,
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writablestreamdefaultcontroller-writealgorithm>
|
||||
#[ignore_malloc_size_of = "Rc is hard"]
|
||||
write: RefCell<Option<Rc<UnderlyingSinkWriteCallback>>>,
|
||||
|
||||
/// The JS object used as `this` when invoking sink algorithms.
|
||||
#[ignore_malloc_size_of = "mozjs"]
|
||||
underlying_sink_obj: Heap<*mut JSObject>,
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writablestreamdefaultcontroller-queue>
|
||||
queue: RefCell<QueueWithSizes>,
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writablestreamdefaultcontroller-started>
|
||||
started: Cell<bool>,
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writablestreamdefaultcontroller-strategyhwm>
|
||||
strategy_hwm: f64,
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writablestreamdefaultcontroller-strategysizealgorithm>
|
||||
#[ignore_malloc_size_of = "Rc is hard"]
|
||||
strategy_size: RefCell<Option<Rc<QueuingStrategySize>>>,
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writablestreamdefaultcontroller-stream>
|
||||
stream: MutNullableDom<WritableStream>,
|
||||
}
|
||||
|
||||
impl WritableStreamDefaultController {
|
||||
/// <https://streams.spec.whatwg.org/#set-up-writable-stream-default-controller-from-underlying-sink>
|
||||
#[cfg_attr(crown, allow(crown::unrooted_must_root))]
|
||||
fn new_inherited(
|
||||
underlying_sink: &UnderlyingSink,
|
||||
strategy_hwm: f64,
|
||||
strategy_size: Rc<QueuingStrategySize>,
|
||||
) -> WritableStreamDefaultController {
|
||||
WritableStreamDefaultController {
|
||||
reflector_: Reflector::new(),
|
||||
queue: Default::default(),
|
||||
stream: Default::default(),
|
||||
abort: RefCell::new(underlying_sink.abort.clone()),
|
||||
close: RefCell::new(underlying_sink.close.clone()),
|
||||
write: RefCell::new(underlying_sink.write.clone()),
|
||||
underlying_sink_obj: Default::default(),
|
||||
strategy_hwm,
|
||||
strategy_size: RefCell::new(Some(strategy_size)),
|
||||
started: Default::default(),
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn new(
|
||||
global: &GlobalScope,
|
||||
underlying_sink: &UnderlyingSink,
|
||||
strategy_hwm: f64,
|
||||
strategy_size: Rc<QueuingStrategySize>,
|
||||
can_gc: CanGc,
|
||||
) -> DomRoot<WritableStreamDefaultController> {
|
||||
reflect_dom_object(
|
||||
Box::new(WritableStreamDefaultController::new_inherited(
|
||||
underlying_sink,
|
||||
strategy_hwm,
|
||||
strategy_size,
|
||||
)),
|
||||
global,
|
||||
can_gc,
|
||||
)
|
||||
}
|
||||
|
||||
pub(crate) fn started(&self) -> bool {
|
||||
self.started.get()
|
||||
}
|
||||
|
||||
/// Setting the JS object after the heap has settled down.
|
||||
pub(crate) fn set_underlying_sink_this_object(&self, this_object: SafeHandleObject) {
|
||||
self.underlying_sink_obj.set(*this_object);
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-clear-algorithms>
|
||||
fn clear_algorithms(&self) {
|
||||
// Set controller.[[writeAlgorithm]] to undefined.
|
||||
self.write.borrow_mut().take();
|
||||
|
||||
// Set controller.[[closeAlgorithm]] to undefined.
|
||||
self.close.borrow_mut().take();
|
||||
|
||||
// Set controller.[[abortAlgorithm]] to undefined.
|
||||
self.abort.borrow_mut().take();
|
||||
|
||||
// Set controller.[[strategySizeAlgorithm]] to undefined.
|
||||
self.strategy_size.borrow_mut().take();
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#set-up-writable-stream-default-controllerr>
|
||||
#[allow(unsafe_code)]
|
||||
pub(crate) fn setup(
|
||||
&self,
|
||||
cx: SafeJSContext,
|
||||
global: &GlobalScope,
|
||||
stream: &WritableStream,
|
||||
start: &Option<Rc<UnderlyingSinkStartCallback>>,
|
||||
can_gc: CanGc,
|
||||
) -> Result<(), Error> {
|
||||
// Assert: stream implements WritableStream.
|
||||
// Implied by stream type.
|
||||
|
||||
// Assert: stream.[[controller]] is undefined.
|
||||
stream.assert_no_controller();
|
||||
|
||||
// Set controller.[[stream]] to stream.
|
||||
self.stream.set(Some(stream));
|
||||
|
||||
// Set stream.[[controller]] to controller.
|
||||
stream.set_default_controller(self);
|
||||
|
||||
// Perform ! ResetQueue(controller).
|
||||
|
||||
// Set controller.[[abortController]] to a new AbortController.
|
||||
|
||||
// Set controller.[[started]] to false.
|
||||
|
||||
// Set controller.[[strategySizeAlgorithm]] to sizeAlgorithm.
|
||||
|
||||
// Set controller.[[strategyHWM]] to highWaterMark.
|
||||
|
||||
// Set controller.[[writeAlgorithm]] to writeAlgorithm.
|
||||
|
||||
// Set controller.[[closeAlgorithm]] to closeAlgorithm.
|
||||
|
||||
// Set controller.[[abortAlgorithm]] to abortAlgorithm.
|
||||
|
||||
// Note: above steps are done in `new_inherited`.
|
||||
|
||||
// Let backpressure be ! WritableStreamDefaultControllerGetBackpressure(controller).
|
||||
let backpressure = self.get_backpressure();
|
||||
|
||||
// Perform ! WritableStreamUpdateBackpressure(stream, backpressure).
|
||||
stream.update_backpressure(backpressure, global, can_gc);
|
||||
|
||||
// Let startResult be the result of performing startAlgorithm. (This may throw an exception.)
|
||||
// Let startPromise be a promise resolved with startResult.
|
||||
let start_promise = if let Some(start) = start {
|
||||
rooted!(in(*cx) let mut result_object = ptr::null_mut::<JSObject>());
|
||||
rooted!(in(*cx) let mut result: JSVal);
|
||||
rooted!(in(*cx) let this_object = self.underlying_sink_obj.get());
|
||||
start.Call_(
|
||||
&this_object.handle(),
|
||||
self,
|
||||
result.handle_mut(),
|
||||
ExceptionHandling::Rethrow,
|
||||
)?;
|
||||
let is_promise = unsafe {
|
||||
if result.is_object() {
|
||||
result_object.set(result.to_object());
|
||||
IsPromiseObject(result_object.handle().into_handle())
|
||||
} else {
|
||||
false
|
||||
}
|
||||
};
|
||||
if is_promise {
|
||||
let promise = Promise::new_with_js_promise(result_object.handle(), cx);
|
||||
promise
|
||||
} else {
|
||||
let promise = Promise::new(global, can_gc);
|
||||
promise.resolve_native(&result.get());
|
||||
promise
|
||||
}
|
||||
} else {
|
||||
let promise = Promise::new(global, can_gc);
|
||||
promise.resolve_native(&());
|
||||
promise
|
||||
};
|
||||
|
||||
let rooted_default_controller = DomRoot::from_ref(self);
|
||||
|
||||
// Upon fulfillment of startPromise,
|
||||
rooted!(in(*cx) let mut fulfillment_handler = Some(StartAlgorithmFulfillmentHandler {
|
||||
controller: Dom::from_ref(&rooted_default_controller),
|
||||
}));
|
||||
|
||||
// Upon rejection of startPromise with reason r,
|
||||
rooted!(in(*cx) let mut rejection_handler = Some(StartAlgorithmRejectionHandler {
|
||||
controller: Dom::from_ref(&rooted_default_controller),
|
||||
}));
|
||||
|
||||
let handler = PromiseNativeHandler::new(
|
||||
global,
|
||||
fulfillment_handler.take().map(|h| Box::new(h) as Box<_>),
|
||||
rejection_handler.take().map(|h| Box::new(h) as Box<_>),
|
||||
);
|
||||
let realm = enter_realm(global);
|
||||
let comp = InRealm::Entered(&realm);
|
||||
start_promise.append_native_handler(&handler, comp, can_gc);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-close>
|
||||
pub(crate) fn close(&self, cx: SafeJSContext, global: &GlobalScope, can_gc: CanGc) {
|
||||
// Perform ! EnqueueValueWithSize(controller, close sentinel, 0).
|
||||
{
|
||||
let mut queue = self.queue.borrow_mut();
|
||||
queue
|
||||
.enqueue_value_with_size(EnqueuedValue::CloseSentinel)
|
||||
.expect("Enqueuing the close sentinel should not fail.");
|
||||
}
|
||||
// Perform ! WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller).
|
||||
self.advance_queue_if_needed(cx, global, can_gc);
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#ref-for-abstract-opdef-writablestreamcontroller-abortsteps>
|
||||
pub(crate) fn abort_steps(
|
||||
&self,
|
||||
cx: SafeJSContext,
|
||||
global: &GlobalScope,
|
||||
reason: SafeHandleValue,
|
||||
can_gc: CanGc,
|
||||
) -> Rc<Promise> {
|
||||
rooted!(in(*cx) let this_object = self.underlying_sink_obj.get());
|
||||
let algo = self.abort.borrow().clone();
|
||||
let result = if let Some(algo) = algo {
|
||||
algo.Call_(
|
||||
&this_object.handle(),
|
||||
Some(reason),
|
||||
ExceptionHandling::Rethrow,
|
||||
)
|
||||
} else {
|
||||
let promise = Promise::new(global, can_gc);
|
||||
promise.resolve_native(&());
|
||||
Ok(promise)
|
||||
};
|
||||
result.unwrap_or_else(|e| {
|
||||
let promise = Promise::new(global, can_gc);
|
||||
promise.reject_error(e);
|
||||
promise
|
||||
})
|
||||
}
|
||||
|
||||
pub(crate) fn call_write_algorithm(
|
||||
&self,
|
||||
cx: SafeJSContext,
|
||||
chunk: SafeHandleValue,
|
||||
global: &GlobalScope,
|
||||
can_gc: CanGc,
|
||||
) -> Rc<Promise> {
|
||||
rooted!(in(*cx) let this_object = self.underlying_sink_obj.get());
|
||||
let algo = self.write.borrow().clone();
|
||||
let result = if let Some(algo) = algo {
|
||||
algo.Call_(
|
||||
&this_object.handle(),
|
||||
chunk,
|
||||
self,
|
||||
ExceptionHandling::Rethrow,
|
||||
)
|
||||
} else {
|
||||
let promise = Promise::new(global, can_gc);
|
||||
promise.resolve_native(&());
|
||||
Ok(promise)
|
||||
};
|
||||
result.unwrap_or_else(|e| {
|
||||
let promise = Promise::new(global, can_gc);
|
||||
promise.reject_error(e);
|
||||
promise
|
||||
})
|
||||
}
|
||||
|
||||
fn call_close_algorithm(
|
||||
&self,
|
||||
cx: SafeJSContext,
|
||||
global: &GlobalScope,
|
||||
can_gc: CanGc,
|
||||
) -> Rc<Promise> {
|
||||
rooted!(in(*cx) let mut this_object = ptr::null_mut::<JSObject>());
|
||||
this_object.set(self.underlying_sink_obj.get());
|
||||
let algo = self.close.borrow().clone();
|
||||
let result = if let Some(algo) = algo {
|
||||
algo.Call_(&this_object.handle(), ExceptionHandling::Rethrow)
|
||||
} else {
|
||||
let promise = Promise::new(global, can_gc);
|
||||
promise.resolve_native(&());
|
||||
Ok(promise)
|
||||
};
|
||||
result.unwrap_or_else(|e| {
|
||||
let promise = Promise::new(global, can_gc);
|
||||
promise.reject_error(e);
|
||||
promise
|
||||
})
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-process-close>
|
||||
pub(crate) fn process_close(&self, cx: SafeJSContext, global: &GlobalScope, can_gc: CanGc) {
|
||||
// Let stream be controller.[[stream]].
|
||||
let Some(stream) = self.stream.get() else {
|
||||
unreachable!("Controller should have a stream");
|
||||
};
|
||||
|
||||
// Perform ! WritableStreamMarkCloseRequestInFlight(stream).
|
||||
stream.mark_close_request_in_flight();
|
||||
|
||||
// Perform ! DequeueValue(controller).
|
||||
{
|
||||
let mut queue = self.queue.borrow_mut();
|
||||
queue.dequeue_value(cx, None);
|
||||
}
|
||||
|
||||
// Assert: controller.[[queue]] is empty.
|
||||
assert!(self.queue.borrow().is_empty());
|
||||
|
||||
// Let sinkClosePromise be the result of performing controller.[[closeAlgorithm]].
|
||||
let sink_close_promise = self.call_close_algorithm(cx, global, can_gc);
|
||||
|
||||
// Perform ! WritableStreamDefaultControllerClearAlgorithms(controller).
|
||||
self.clear_algorithms();
|
||||
|
||||
// Upon fulfillment of sinkClosePromise,
|
||||
rooted!(in(*cx) let mut fulfillment_handler = Some(CloseAlgorithmFulfillmentHandler {
|
||||
stream: Dom::from_ref(&stream),
|
||||
}));
|
||||
|
||||
// Upon rejection of sinkClosePromise with reason reason,
|
||||
rooted!(in(*cx) let mut rejection_handler = Some(CloseAlgorithmRejectionHandler {
|
||||
stream: Dom::from_ref(&stream),
|
||||
}));
|
||||
|
||||
// Attach handlers to the promise.
|
||||
let handler = PromiseNativeHandler::new(
|
||||
global,
|
||||
fulfillment_handler.take().map(|h| Box::new(h) as Box<_>),
|
||||
rejection_handler.take().map(|h| Box::new(h) as Box<_>),
|
||||
);
|
||||
let realm = enter_realm(global);
|
||||
let comp = InRealm::Entered(&realm);
|
||||
sink_close_promise.append_native_handler(&handler, comp, can_gc);
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-advance-queue-if-needed>
|
||||
fn advance_queue_if_needed(&self, cx: SafeJSContext, global: &GlobalScope, can_gc: CanGc) {
|
||||
// Let stream be controller.[[stream]].
|
||||
let Some(stream) = self.stream.get() else {
|
||||
unreachable!("Controller should have a stream");
|
||||
};
|
||||
|
||||
// If controller.[[started]] is false, return.
|
||||
if !self.started.get() {
|
||||
return;
|
||||
}
|
||||
|
||||
// If stream.[[inFlightWriteRequest]] is not undefined, return.
|
||||
if stream.has_in_flight_write_request() {
|
||||
return;
|
||||
}
|
||||
|
||||
// Let state be stream.[[state]].
|
||||
|
||||
// Assert: state is not "closed" or "errored".
|
||||
assert!(!(stream.is_errored() || stream.is_closed()));
|
||||
|
||||
// If state is "erroring",
|
||||
if stream.is_erroring() {
|
||||
// Perform ! WritableStreamFinishErroring(stream).
|
||||
stream.finish_erroring(cx, global, can_gc);
|
||||
|
||||
// Return.
|
||||
return;
|
||||
}
|
||||
|
||||
// Let value be ! PeekQueueValue(controller).
|
||||
rooted!(in(*cx) let mut value = UndefinedValue());
|
||||
let is_closed = {
|
||||
let queue = self.queue.borrow_mut();
|
||||
|
||||
// If controller.[[queue]] is empty, return.
|
||||
if queue.is_empty() {
|
||||
return;
|
||||
}
|
||||
queue.peek_queue_value(cx, value.handle_mut())
|
||||
};
|
||||
|
||||
if is_closed {
|
||||
// If value is the close sentinel, perform ! WritableStreamDefaultControllerProcessClose(controller).
|
||||
self.process_close(cx, global, can_gc);
|
||||
} else {
|
||||
// Otherwise, perform ! WritableStreamDefaultControllerProcessWrite(controller, value).
|
||||
self.process_write(cx, value.handle(), global, can_gc);
|
||||
};
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#ws-default-controller-private-error>
|
||||
pub(crate) fn perform_error_steps(&self) {
|
||||
// Perform ! ResetQueue(this).
|
||||
self.queue.borrow_mut().reset();
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-process-write>
|
||||
fn process_write(
|
||||
&self,
|
||||
cx: SafeJSContext,
|
||||
chunk: SafeHandleValue,
|
||||
global: &GlobalScope,
|
||||
can_gc: CanGc,
|
||||
) {
|
||||
// Let stream be controller.[[stream]].
|
||||
let Some(stream) = self.stream.get() else {
|
||||
unreachable!("Controller should have a stream");
|
||||
};
|
||||
|
||||
// Perform ! WritableStreamMarkFirstWriteRequestInFlight(stream).
|
||||
stream.mark_first_write_request_in_flight();
|
||||
|
||||
// Let sinkWritePromise be the result of performing controller.[[writeAlgorithm]], passing in chunk.
|
||||
let sink_write_promise = self.call_write_algorithm(cx, chunk, global, can_gc);
|
||||
|
||||
// Upon fulfillment of sinkWritePromise,
|
||||
rooted!(in(*cx) let mut fulfillment_handler = Some(WriteAlgorithmFulfillmentHandler {
|
||||
controller: Dom::from_ref(self),
|
||||
}));
|
||||
|
||||
// Upon rejection of sinkWritePromise with reason,
|
||||
rooted!(in(*cx) let mut rejection_handler = Some(WriteAlgorithmRejectionHandler {
|
||||
controller: Dom::from_ref(self),
|
||||
}));
|
||||
|
||||
// Attach handlers to the promise.
|
||||
let handler = PromiseNativeHandler::new(
|
||||
global,
|
||||
fulfillment_handler.take().map(|h| Box::new(h) as Box<_>),
|
||||
rejection_handler.take().map(|h| Box::new(h) as Box<_>),
|
||||
);
|
||||
let realm = enter_realm(global);
|
||||
let comp = InRealm::Entered(&realm);
|
||||
sink_write_promise.append_native_handler(&handler, comp, can_gc);
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-get-desired-size>
|
||||
pub(crate) fn get_desired_size(&self) -> f64 {
|
||||
// Return controller.[[strategyHWM]] − controller.[[queueTotalSize]].
|
||||
let queue = self.queue.borrow();
|
||||
let desired_size = self.strategy_hwm - queue.total_size.clamp(0.0, f64::MAX);
|
||||
desired_size.clamp(desired_size, self.strategy_hwm)
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-get-backpressure>
|
||||
fn get_backpressure(&self) -> bool {
|
||||
// Let desiredSize be ! WritableStreamDefaultControllerGetDesiredSize(controller).
|
||||
let desired_size = self.get_desired_size();
|
||||
|
||||
// Return true if desiredSize ≤ 0, or false otherwise.
|
||||
desired_size == 0.0 || desired_size.is_sign_negative()
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-get-chunk-size>
|
||||
pub(crate) fn get_chunk_size(
|
||||
&self,
|
||||
cx: SafeJSContext,
|
||||
global: &GlobalScope,
|
||||
chunk: SafeHandleValue,
|
||||
can_gc: CanGc,
|
||||
) -> f64 {
|
||||
// If controller.[[strategySizeAlgorithm]] is undefined,
|
||||
let Some(strategy_size) = self.strategy_size.borrow().clone() else {
|
||||
// Assert: controller.[[stream]].[[state]] is "erroring" or "errored".
|
||||
let Some(stream) = self.stream.get() else {
|
||||
unreachable!("Controller should have a stream");
|
||||
};
|
||||
assert!(stream.is_erroring() || stream.is_errored());
|
||||
|
||||
// Return 1.
|
||||
return 1.0;
|
||||
};
|
||||
|
||||
// Let returnValue be the result of performing controller.[[strategySizeAlgorithm]],
|
||||
// passing in chunk, and interpreting the result as a completion record.
|
||||
let result = strategy_size.Call__(chunk, ExceptionHandling::Rethrow);
|
||||
|
||||
match result {
|
||||
// Let chunkSize be result.[[Value]].
|
||||
Ok(size) => size,
|
||||
Err(error) => {
|
||||
// If result is an abrupt completion,
|
||||
|
||||
// Perform ! WritableStreamDefaultControllerErrorIfNeeded(controller, returnValue.[[Value]]).
|
||||
// Create a rooted value for the error.
|
||||
rooted!(in(*cx) let mut rooted_error = UndefinedValue());
|
||||
error.to_jsval(cx, global, rooted_error.handle_mut());
|
||||
self.error_if_needed(cx, rooted_error.handle(), global, can_gc);
|
||||
|
||||
// Return 1.
|
||||
1.0
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-write>
|
||||
pub(crate) fn write(
|
||||
&self,
|
||||
cx: SafeJSContext,
|
||||
global: &GlobalScope,
|
||||
chunk: SafeHandleValue,
|
||||
chunk_size: f64,
|
||||
can_gc: CanGc,
|
||||
) {
|
||||
// Let enqueueResult be EnqueueValueWithSize(controller, chunk, chunkSize).
|
||||
let enqueue_result = {
|
||||
let mut queue = self.queue.borrow_mut();
|
||||
queue.enqueue_value_with_size(EnqueuedValue::Js(ValueWithSize {
|
||||
value: Heap::boxed(chunk.get()),
|
||||
size: chunk_size,
|
||||
}))
|
||||
};
|
||||
|
||||
// If enqueueResult is an abrupt completion,
|
||||
if let Err(error) = enqueue_result {
|
||||
// Perform ! WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueResult.[[Value]]).
|
||||
// Create a rooted value for the error.
|
||||
rooted!(in(*cx) let mut rooted_error = UndefinedValue());
|
||||
error.to_jsval(cx, global, rooted_error.handle_mut());
|
||||
self.error_if_needed(cx, rooted_error.handle(), global, can_gc);
|
||||
|
||||
// Return.
|
||||
return;
|
||||
}
|
||||
|
||||
// Let stream be controller.[[stream]].
|
||||
let Some(stream) = self.stream.get() else {
|
||||
unreachable!("Controller should have a stream");
|
||||
};
|
||||
|
||||
// If ! WritableStreamCloseQueuedOrInFlight(stream) is false and stream.[[state]] is "writable",
|
||||
if !stream.close_queued_or_in_flight() && stream.is_writable() {
|
||||
// Let backpressure be ! WritableStreamDefaultControllerGetBackpressure(controller).
|
||||
let backpressure = self.get_backpressure();
|
||||
|
||||
// Perform ! WritableStreamUpdateBackpressure(stream, backpressure).
|
||||
stream.update_backpressure(backpressure, global, can_gc);
|
||||
}
|
||||
|
||||
// Perform ! WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller).
|
||||
self.advance_queue_if_needed(cx, global, can_gc);
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-error-if-needed>
|
||||
pub(crate) fn error_if_needed(
|
||||
&self,
|
||||
cx: SafeJSContext,
|
||||
error: SafeHandleValue,
|
||||
global: &GlobalScope,
|
||||
can_gc: CanGc,
|
||||
) {
|
||||
// Let stream be controller.[[stream]].
|
||||
let Some(stream) = self.stream.get() else {
|
||||
unreachable!("Controller should have a stream");
|
||||
};
|
||||
|
||||
// If stream.[[state]] is "writable",
|
||||
if stream.is_writable() {
|
||||
// Perform ! WritableStreamDefaultControllerError(controller, e).
|
||||
self.error(&stream, cx, error, global, can_gc);
|
||||
}
|
||||
}
|
||||
|
||||
/// <https://streams.spec.whatwg.org/#writable-stream-default-controller-error>
|
||||
fn error(
|
||||
&self,
|
||||
stream: &WritableStream,
|
||||
cx: SafeJSContext,
|
||||
e: SafeHandleValue,
|
||||
global: &GlobalScope,
|
||||
can_gc: CanGc,
|
||||
) {
|
||||
// Let stream be controller.[[stream]].
|
||||
// Done above with the argument.
|
||||
|
||||
// Assert: stream.[[state]] is "writable".
|
||||
assert!(stream.is_writable());
|
||||
|
||||
// Perform ! WritableStreamDefaultControllerClearAlgorithms(controller).
|
||||
self.clear_algorithms();
|
||||
|
||||
// Perform ! WritableStreamStartErroring(stream, error).
|
||||
stream.start_erroring(cx, global, e, can_gc);
|
||||
}
|
||||
}
|
||||
|
||||
impl WritableStreamDefaultControllerMethods<crate::DomTypeHolder>
|
||||
for WritableStreamDefaultController
|
||||
{
|
||||
/// <https://streams.spec.whatwg.org/#ws-default-controller-error>
|
||||
fn Error(&self, cx: SafeJSContext, e: SafeHandleValue, realm: InRealm, can_gc: CanGc) {
|
||||
// Let state be this.[[stream]].[[state]].
|
||||
let Some(stream) = self.stream.get() else {
|
||||
unreachable!("Controller should have a stream");
|
||||
};
|
||||
|
||||
// If state is not "writable", return.
|
||||
if !stream.is_writable() {
|
||||
return;
|
||||
}
|
||||
|
||||
let global = GlobalScope::from_safe_context(cx, realm);
|
||||
|
||||
// Perform ! WritableStreamDefaultControllerError(this, e).
|
||||
self.error(&stream, cx, e, &global, can_gc);
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue