mirror of
https://github.com/RGBCube/serenity
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c61a4f35dc
This Intrinsics object hangs off of a new HostDefined struct that takes the place of EnvironmentSettingsObject as the true [[HostDefined]] slot on JS::Realm objects created by LibWeb. This gets the intrinsics off of the GlobalObject, Window, similar to the previous refactor of LibJS to move the intrinsics into the Realm's [[Intrinics]] internal slot. A side effect of this change is that we cannot fully initialize a Window object until the [[HostDefined]] slot has been installed into the realm, which happens with the creation of the WindowEnvironmentSettingsObject. As such, any Window usage that has not been funned through a WindowESO will not have any cached Web prototyped or constructors, and will not have Window APIs available to javascript code. Currently this seems limited to usage of Window in the CSS parser, but a subsequent commit will clean those up to take Realm as well. However, this commit compiles so let's cut it off here :^).
85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
/*
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* Copyright (c) 2022, Andrew Kaster <akaster@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Forward.h>
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#include <AK/HashMap.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibJS/Heap/Heap.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibWeb/Bindings/HostDefined.h>
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namespace Web::Bindings {
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class Intrinsics final : public JS::Cell {
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JS_CELL(Intrinsics, JS::Cell);
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public:
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Intrinsics(JS::Realm& realm)
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: m_realm(realm)
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{
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}
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JS::Object& cached_web_prototype(String const& class_name);
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template<typename T>
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JS::Object& ensure_web_prototype(String const& class_name)
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{
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auto it = m_prototypes.find(class_name);
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if (it != m_prototypes.end())
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return *it->value;
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auto& realm = *m_realm;
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auto* prototype = heap().allocate<T>(realm, realm);
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m_prototypes.set(class_name, prototype);
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return *prototype;
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}
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template<typename T>
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JS::NativeFunction& ensure_web_constructor(String const& class_name)
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{
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auto it = m_constructors.find(class_name);
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if (it != m_constructors.end())
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return *it->value;
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auto& realm = *m_realm;
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auto* constructor = heap().allocate<T>(realm, realm);
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m_constructors.set(class_name, constructor);
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return *constructor;
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}
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private:
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virtual void visit_edges(JS::Cell::Visitor&) override;
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HashMap<String, JS::Object*> m_prototypes;
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HashMap<String, JS::NativeFunction*> m_constructors;
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JS::NonnullGCPtr<JS::Realm> m_realm;
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};
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inline Intrinsics& host_defined_intrinsics(JS::Realm& realm)
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{
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return *verify_cast<HostDefined>(realm.host_defined())->intrinsics;
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}
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template<typename T>
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JS::Object& ensure_web_prototype(JS::Realm& realm, String const& class_name)
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{
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return host_defined_intrinsics(realm).ensure_web_prototype<T>(class_name);
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}
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template<typename T>
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JS::NativeFunction& ensure_web_constructor(JS::Realm& realm, String const& class_name)
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{
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return host_defined_intrinsics(realm).ensure_web_constructor<T>(class_name);
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}
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inline JS::Object& cached_web_prototype(JS::Realm& realm, String const& class_name)
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{
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return host_defined_intrinsics(realm).cached_web_prototype(class_name);
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}
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}
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