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LibWeb: Add initial implementation of structured clone

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This implementation only works for cloning Numbers, and does not try to
do all the spec steps for structured serialize and deserialize.

Co-Authored-By: Andrew Kaster <akaster@serenityos.org>
This commit is contained in:
Daniel Ehrenberg 2022-04-05 02:24:10 +02:00 • committed by Andreas Kling
parent d94d60219c
commit 09841f56ed
5 changed files with 213 additions and 0 deletions
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17
Userland/Libraries/LibWeb/HTML/Window.cpp
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@ -44,6 +44,7 @@
#include <LibWeb/HTML/Scripting/Environments.h>
#include <LibWeb/HTML/Scripting/ExceptionReporter.h>
#include <LibWeb/HTML/Storage.h>
#include <LibWeb/HTML/StructuredSerialize.h>
#include <LibWeb/HTML/Timer.h>
#include <LibWeb/HTML/Window.h>
#include <LibWeb/HTML/WindowProxy.h>
@ -915,6 +916,13 @@ WebIDL::ExceptionOr<void> Window::post_message_impl(JS::Value message, String co
return {};
}
// https://html.spec.whatwg.org/multipage/structured-data.html#dom-structuredclone
WebIDL::ExceptionOr<JS::Value> Window::structured_clone_impl(JS::VM& vm, JS::Value message)
{
auto serialized = TRY(structured_serialize(vm, message));
return MUST(structured_deserialize(vm, serialized, *vm.current_realm(), {}));
}
// https://html.spec.whatwg.org/multipage/window-object.html#dom-name
String Window::name() const
{
@ -1100,6 +1108,7 @@ void Window::initialize_web_interfaces(Badge<WindowEnvironmentSettingsObject>)
define_native_function(realm, "getSelection", get_selection, 0, attr);
define_native_function(realm, "postMessage", post_message, 1, attr);
define_native_function(realm, "structuredClone", structured_clone, 1, attr);
define_native_function(realm, "fetch", Bindings::fetch, 1, attr);
@ -1824,6 +1833,14 @@ JS_DEFINE_NATIVE_FUNCTION(Window::post_message)
return JS::js_undefined();
}
JS_DEFINE_NATIVE_FUNCTION(Window::structured_clone)
{
auto* impl = TRY(impl_from(vm));
return TRY(Bindings::throw_dom_exception_if_needed(vm, [&] {
return impl->structured_clone_impl(vm, vm.argument(0));
}));
}
// https://html.spec.whatwg.org/multipage/webappapis.html#dom-origin
JS_DEFINE_NATIVE_FUNCTION(Window::origin_getter)
{