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LibWeb: Implement the HostGetImportMetaProperties hook

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Timothy Flynn 2023-07-17 21:26:59 -04:00 • committed by Linus Groh
parent 66a8664518
commit e5bcd6c731
1 changed files with 44 additions and 1 deletions
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45
Userland/Libraries/LibWeb/Bindings/MainThreadVM.cpp
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@ -15,6 +15,8 @@
#include <LibJS/Runtime/ModuleRequest.h>
#include <LibJS/Runtime/NativeFunction.h>
#include <LibJS/Runtime/VM.h>
#include <LibJS/SourceTextModule.h>
#include <LibWeb/Bindings/ExceptionOrUtils.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/Bindings/MainThreadVM.h>
#include <LibWeb/Bindings/WindowExposedInterfaces.h>
@ -30,6 +32,7 @@
#include <LibWeb/HTML/Scripting/Environments.h>
#include <LibWeb/HTML/Scripting/ExceptionReporter.h>
#include <LibWeb/HTML/Scripting/Fetching.h>
#include <LibWeb/HTML/Scripting/Script.h>
#include <LibWeb/HTML/TagNames.h>
#include <LibWeb/HTML/Window.h>
#include <LibWeb/HTML/WindowProxy.h>
@ -344,7 +347,47 @@ ErrorOr<void> initialize_main_thread_vm()
return { JS::make_handle(&callable), move(host_defined) };
};
// FIXME: Implement 8.1.5.5.1 HostGetImportMetaProperties(moduleRecord), https://html.spec.whatwg.org/multipage/webappapis.html#hostgetimportmetaproperties
// 8.1.5.5.1 HostGetImportMetaProperties(moduleRecord), https://html.spec.whatwg.org/multipage/webappapis.html#hostgetimportmetaproperties
s_main_thread_vm->host_get_import_meta_properties = [](JS::SourceTextModule& module_record) {
auto& realm = module_record.realm();
auto& vm = realm.vm();
// 1. Let moduleScript be moduleRecord.[[HostDefined]].
auto& module_script = *verify_cast<HTML::Script>(module_record.host_defined());
// 2. Assert: moduleScript's base URL is not null, as moduleScript is a JavaScript module script.
VERIFY(module_script.base_url().is_valid());
// 3. Let urlString be moduleScript's base URL, serialized.
auto url_string = module_script.base_url().serialize();
// 4. Let steps be the following steps, given the argument specifier:
auto steps = [module_script = JS::NonnullGCPtr { module_script }](JS::VM& vm) -> JS::ThrowCompletionOr<JS::Value> {
auto specifier = vm.argument(0);
// 1. Set specifier to ? ToString(specifier).
auto specifier_string = TRY(specifier.to_string(vm));
// 2. Let url be the result of resolving a module specifier given moduleScript and specifier.
auto url = TRY(Bindings::throw_dom_exception_if_needed(vm, [&] {
return HTML::resolve_module_specifier(*module_script, specifier_string.to_deprecated_string());
}));
// 3. Return the serialization of url.
return JS::PrimitiveString::create(vm, url.serialize());
};
// 4. Let resolveFunction be ! CreateBuiltinFunction(steps, 1, "resolve", « »).
auto resolve_function = JS::NativeFunction::create(realm, move(steps), 1, vm.names.resolve);
// 5. Return « Record { [[Key]]: "url", [[Value]]: urlString }, Record { [[Key]]: "resolve", [[Value]]: resolveFunction } ».
HashMap<JS::PropertyKey, JS::Value> meta;
meta.set("url", JS::PrimitiveString::create(vm, move(url_string)));
meta.set("resolve", resolve_function);
return meta;
};
// FIXME: Implement 8.1.5.5.2 HostImportModuleDynamically(referencingScriptOrModule, moduleRequest, promiseCapability), https://html.spec.whatwg.org/multipage/webappapis.html#hostimportmoduledynamically(referencingscriptormodule,-modulerequest,-promisecapability)
// FIXME: Implement 8.1.5.5.3 HostResolveImportedModule(referencingScriptOrModule, moduleRequest), https://html.spec.whatwg.org/multipage/webappapis.html#hostresolveimportedmodule(referencingscriptormodule,-modulerequest)