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LibWeb: Use ArrayBufferView for ReadableStreamBYOBReader
Which means that we now have support for DataViews. Using the ArrayBufferView class also seems to make this read a whole bunch nicer as well.
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7 changed files with 41 additions and 37 deletions
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@ -11,6 +11,7 @@
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#include <LibWeb/Streams/AbstractOperations.h>
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#include <LibWeb/Streams/ReadableStream.h>
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#include <LibWeb/Streams/ReadableStreamBYOBReader.h>
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#include <LibWeb/WebIDL/Buffers.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::Streams {
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@ -103,29 +104,26 @@ private:
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};
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// https://streams.spec.whatwg.org/#byob-reader-read
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WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> ReadableStreamBYOBReader::read(JS::Value view_value)
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WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> ReadableStreamBYOBReader::read(JS::Handle<WebIDL::ArrayBufferView>& view)
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{
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auto& realm = this->realm();
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// FIXME: Support DataViews
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auto& view = verify_cast<JS::TypedArrayBase>(view_value.as_object());
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// 1. If view.[[ByteLength]] is 0, return a promise rejected with a TypeError exception.
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if (view.byte_length() == 0) {
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if (view->byte_length() == 0) {
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auto exception = JS::TypeError::create(realm, "Cannot read in an empty buffer"sv);
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auto promise_capability = WebIDL::create_rejected_promise(realm, exception);
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return JS::NonnullGCPtr { verify_cast<JS::Promise>(*promise_capability->promise()) };
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}
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// 2. If view.[[ViewedArrayBuffer]].[[ArrayBufferByteLength]] is 0, return a promise rejected with a TypeError exception.
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if (view.viewed_array_buffer()->byte_length() == 0) {
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if (view->viewed_array_buffer()->byte_length() == 0) {
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auto exception = JS::TypeError::create(realm, "Cannot read in an empty buffer"sv);
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auto promise_capability = WebIDL::create_rejected_promise(realm, exception);
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return JS::NonnullGCPtr { verify_cast<JS::Promise>(*promise_capability->promise()) };
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}
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// 3. If ! IsDetachedBuffer(view.[[ViewedArrayBuffer]]) is true, return a promise rejected with a TypeError exception.
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if (view.viewed_array_buffer()->is_detached()) {
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if (view->viewed_array_buffer()->is_detached()) {
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auto exception = JS::TypeError::create(realm, "Cannot read in a detached buffer"sv);
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auto promise_capability = WebIDL::create_rejected_promise(realm, exception);
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return JS::NonnullGCPtr { verify_cast<JS::Promise>(*promise_capability->promise()) };
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@ -151,7 +149,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> ReadableStreamBYOBReader::rea
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auto read_into_request = heap().allocate_without_realm<BYOBReaderReadIntoRequest>(realm, promise_capability);
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// 7. Perform ! ReadableStreamBYOBReaderRead(this, view, readIntoRequest).
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readable_stream_byob_reader_read(*this, view_value, *read_into_request);
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readable_stream_byob_reader_read(*this, *view, *read_into_request);
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// 8. Return promise.
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return JS::NonnullGCPtr { verify_cast<JS::Promise>(*promise_capability->promise()) };
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