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ladybird/Userland/Libraries/LibJS/Runtime/ObjectConstructor.h

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LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
Everywhere: Use linusg@serenityos.org for my copyright headers
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* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
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*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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* SPDX-License-Identifier: BSD-2-Clause
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
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*/
#pragma once
#include <LibJS/Runtime/NativeFunction.h>
namespace JS {
class ObjectConstructor final : public NativeFunction {
LibJS+LibWeb: Add JS::Object::inherits(class_name) To allow implementing the DOM class hierarchy in JS bindings, this patch adds an inherits() function that can be used to ask an Object if it inherits from a specific C++ class (by name). The necessary overrides are baked into each Object subclass by the new JS_OBJECT macro, which works similarly to C_OBJECT in LibCore. Thanks to @Dexesttp for suggesting this approach. :^)
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JS_OBJECT(ObjectConstructor, NativeFunction);
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
2020-03-28 13:23:54 -03:00
public:
LibJS: Move native objects towards two-pass construction To make sure that everything is set up correctly in objects before we start adding properties to them, we split cell allocation into 3 steps: 1. Allocate a cell of appropriate size from the Heap 2. Call the C++ constructor on the cell 3. Call initialize() on the constructed object The job of initialize() is to define all the initial properties. Doing it in a second pass guarantees that the Object has a valid Shape and can find its own GlobalObject.
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explicit ObjectConstructor(GlobalObject&);
LibJS: Simplify Cell::initialize() Remove the Interpreter& argument and pass only GlobalObject&. We can find everything we need via the global object anyway.
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virtual void initialize(GlobalObject&) override;
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
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virtual ~ObjectConstructor() override;
LibJS: Make Function::call() not require an Interpreter& This makes a difference inside ScriptFunction::call(), which will now instantiate a temporary Interpreter if one is not attached to the VM.
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virtual Value call() override;
LibJS: Rename Function => FunctionObject
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virtual Value construct(FunctionObject& new_target) override;
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
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private:
LibJS: Implement constructor/non-constructor function calls This adds Function::construct() for constructor function calls via `new` keyword. NativeFunction doesn't have constructor behaviour by default, ScriptFunction simply calls call() in construct()
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virtual bool has_constructor() const override { return true; }
LibJS: Rework how native functions are called to improve |this| value Native functions now only get the Interpreter& as an argument. They can then extract |this| along with any indexed arguments it wants from it. This forces functions that want |this| to actually deal with calling interpreter.this_value().to_object(), and dealing with the possibility of a non-object |this|. This is still not great but let's keep massaging it forward.
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LibJS: Rename ObjectConstructor::{define_property_ => define_property} As the non-standard helper define_property is now removed, this doesnt clash with it anymore.
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JS_DECLARE_NATIVE_FUNCTION(define_property);
LibJS: Implement Object.defineProperties()
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JS_DECLARE_NATIVE_FUNCTION(define_properties);
LibJS: Pass GlobalObject& to native functions and property accessors More work towards supporting multiple global objects. Native C++ code now get a GlobalObject& and don't have to ask the Interpreter for it. I've added macros for declaring and defining native callbacks since this was pretty tedious and this makes it easier next time we want to change any of these signatures.
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JS_DECLARE_NATIVE_FUNCTION(is);
JS_DECLARE_NATIVE_FUNCTION(get_own_property_descriptor);
LibJS: Implement Object.getOwnPropertyDescriptors()
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JS_DECLARE_NATIVE_FUNCTION(get_own_property_descriptors);
LibJS: Pass GlobalObject& to native functions and property accessors More work towards supporting multiple global objects. Native C++ code now get a GlobalObject& and don't have to ask the Interpreter for it. I've added macros for declaring and defining native callbacks since this was pretty tedious and this makes it easier next time we want to change any of these signatures.
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JS_DECLARE_NATIVE_FUNCTION(get_own_property_names);
LibJS: Add the Object.getOwnPropertySymbols method
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JS_DECLARE_NATIVE_FUNCTION(get_own_property_symbols);
LibJS: Pass GlobalObject& to native functions and property accessors More work towards supporting multiple global objects. Native C++ code now get a GlobalObject& and don't have to ask the Interpreter for it. I've added macros for declaring and defining native callbacks since this was pretty tedious and this makes it easier next time we want to change any of these signatures.
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JS_DECLARE_NATIVE_FUNCTION(get_prototype_of);
JS_DECLARE_NATIVE_FUNCTION(set_prototype_of);
JS_DECLARE_NATIVE_FUNCTION(is_extensible);
LibJS: Implement Object.isFrozen() and Object.isSealed()
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JS_DECLARE_NATIVE_FUNCTION(is_frozen);
JS_DECLARE_NATIVE_FUNCTION(is_sealed);
LibJS: Pass GlobalObject& to native functions and property accessors More work towards supporting multiple global objects. Native C++ code now get a GlobalObject& and don't have to ask the Interpreter for it. I've added macros for declaring and defining native callbacks since this was pretty tedious and this makes it easier next time we want to change any of these signatures.
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JS_DECLARE_NATIVE_FUNCTION(prevent_extensions);
LibJS: Implement Object.freeze() and Object.seal()
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JS_DECLARE_NATIVE_FUNCTION(seal);
JS_DECLARE_NATIVE_FUNCTION(freeze);
LibJS: Add the Object.fromEntries method
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JS_DECLARE_NATIVE_FUNCTION(from_entries);
LibJS: Pass GlobalObject& to native functions and property accessors More work towards supporting multiple global objects. Native C++ code now get a GlobalObject& and don't have to ask the Interpreter for it. I've added macros for declaring and defining native callbacks since this was pretty tedious and this makes it easier next time we want to change any of these signatures.
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JS_DECLARE_NATIVE_FUNCTION(keys);
JS_DECLARE_NATIVE_FUNCTION(values);
JS_DECLARE_NATIVE_FUNCTION(entries);
LibJS: Implement Object.create()
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JS_DECLARE_NATIVE_FUNCTION(create);
LibJS: Implement Object.hasOwn() :^) This is currently a TC39 Stage 2 proposal, but let's go for it! https://github.com/tc39/proposal-accessible-object-hasownproperty I wrote the C++, @linusg found bugs and wrote the test.
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JS_DECLARE_NATIVE_FUNCTION(has_own);
LibJS: Implement Object.assign()
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JS_DECLARE_NATIVE_FUNCTION(assign);
LibJS: Add a global "Object" constructor This patch adds an "Object" constructor to the global object. The only function it implements so far is Object.getPrototypeOf().
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};
}
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