b84f8fb55b
Some of these are allocated upon initialization of the intrinsics, and some lazily, but in neither case the getters actually return a nullptr. This saves us a whole bunch of pointer dereferences (as NonnullGCPtr has an `operator T&()`), and also has the interesting side effect of forcing us to explicitly use the FunctionObject& overload of call(), as passing a NonnullGCPtr is ambigous - it could implicitly be turned into a Value _or_ a FunctionObject& (so we have to dereference manually).
69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
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* Copyright (c) 2022-2023, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/String.h>
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#include <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/Value.h>
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#include <LibTextCodec/Decoder.h>
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#include <LibWeb/Infra/JSON.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::Infra {
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// https://infra.spec.whatwg.org/#parse-a-json-string-to-a-javascript-value
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WebIDL::ExceptionOr<JS::Value> parse_json_string_to_javascript_value(JS::Realm& realm, StringView string)
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{
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auto& vm = realm.vm();
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// 1. Return ? Call(%JSON.parse%, undefined, « string »).
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return TRY(JS::call(vm, *realm.intrinsics().json_parse_function(), JS::js_undefined(), MUST_OR_THROW_OOM(JS::PrimitiveString::create(vm, string))));
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}
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// https://infra.spec.whatwg.org/#parse-json-bytes-to-a-javascript-value
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WebIDL::ExceptionOr<JS::Value> parse_json_bytes_to_javascript_value(JS::Realm& realm, ReadonlyBytes bytes)
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{
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auto& vm = realm.vm();
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// 1. Let string be the result of running UTF-8 decode on bytes.
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TextCodec::UTF8Decoder decoder;
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auto string = TRY_OR_THROW_OOM(vm, decoder.to_utf8(bytes));
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// 2. Return the result of parsing a JSON string to an Infra value given string.
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return parse_json_string_to_javascript_value(realm, string);
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}
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// https://infra.spec.whatwg.org/#serialize-a-javascript-value-to-a-json-string
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WebIDL::ExceptionOr<String> serialize_javascript_value_to_json_string(JS::VM& vm, JS::Value value)
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{
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auto& realm = *vm.current_realm();
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// 1. Let result be ? Call(%JSON.stringify%, undefined, « value »).
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auto result = TRY(JS::call(vm, *realm.intrinsics().json_stringify_function(), JS::js_undefined(), value));
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// 2. If result is undefined, then throw a TypeError.
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if (result.is_undefined())
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return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "Result of stringifying value must not be undefined"sv };
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// 3. Assert: result is a string.
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VERIFY(result.is_string());
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// 4. Return result.
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return TRY(result.as_string().utf8_string());
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}
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// https://infra.spec.whatwg.org/#serialize-a-javascript-value-to-json-bytes
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WebIDL::ExceptionOr<ByteBuffer> serialize_javascript_value_to_json_bytes(JS::VM& vm, JS::Value value)
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{
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// 1. Let string be the result of serializing a JavaScript value to a JSON string given value.
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auto string = TRY(serialize_javascript_value_to_json_string(vm, value));
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// 2. Return the result of running UTF-8 encode on string.
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// NOTE: LibJS strings are stored as UTF-8.
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return TRY_OR_THROW_OOM(vm, ByteBuffer::copy(string.bytes()));
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}
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}
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