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LibWeb+Meta: Add wrapper for the BufferSource/ArrayBufferView IDL types

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These wrappers will make it much easier to do various operations on the
different ArrayBuffer-related classes in LibWeb compared to the current
solution, which is to just accept a Handle<Object> everywhere (and use
"any" in the *.idl files).

Co-Authored-By: Matthew Olsson <mattco@serenityos.org>
This commit is contained in:
Shannon Booth 2023-11-23 20:07:25 +13:00 • committed by Andreas Kling
parent 54d0aafff0
commit 04c094343f
27 changed files with 286 additions and 71 deletions
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85
Userland/Libraries/LibWeb/WebIDL/Buffers.h Normal file
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/*
* Copyright (c) 2023, Shannon Booth <shannon@serenityos.org>
* Copyright (c) 2023, Matthew Olsson <mattco@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Variant.h>
#include <LibJS/Forward.h>
#include <LibJS/Heap/Cell.h>
namespace Web::WebIDL {
using BufferableObject = Variant<
JS::NonnullGCPtr<JS::TypedArrayBase>,
JS::NonnullGCPtr<JS::DataView>,
JS::NonnullGCPtr<JS::ArrayBuffer>>;
class BufferableObjectBase : public JS::Cell {
JS_CELL(BufferableObjectBase, JS::Cell);
public:
virtual ~BufferableObjectBase() override = default;
u32 byte_length() const;
JS::NonnullGCPtr<JS::Object> raw_object();
JS::GCPtr<JS::ArrayBuffer> viewed_array_buffer();
BufferableObject const& bufferable_object() const { return m_bufferable_object; }
BufferableObject& bufferable_object() { return m_bufferable_object; }
protected:
BufferableObjectBase(JS::NonnullGCPtr<JS::Object>);
virtual void visit_edges(Visitor&) override;
bool is_data_view() const;
bool is_typed_array_base() const;
bool is_array_buffer() const;
static BufferableObject bufferable_object_from_raw_object(JS::NonnullGCPtr<JS::Object>);
BufferableObject m_bufferable_object;
};
// https://webidl.spec.whatwg.org/#ArrayBufferView
//
// typedef (Int8Array or Int16Array or Int32Array or
// Uint8Array or Uint16Array or Uint32Array or Uint8ClampedArray or
// BigInt64Array or BigUint64Array or
// Float32Array or Float64Array or DataView) ArrayBufferView;
class ArrayBufferView : public BufferableObjectBase {
JS_CELL(ArrayBufferView, BufferableObjectBase);
public:
using BufferableObjectBase::BufferableObjectBase;
virtual ~ArrayBufferView() override;
using BufferableObjectBase::is_data_view;
using BufferableObjectBase::is_typed_array_base;
u32 byte_offset() const;
};
// https://webidl.spec.whatwg.org/#BufferSource
//
// typedef (ArrayBufferView or ArrayBuffer) BufferSource;
class BufferSource : public BufferableObjectBase {
JS_CELL(BufferSource, BufferableObjectBase);
public:
using BufferableObjectBase::BufferableObjectBase;
virtual ~BufferSource() override;
using BufferableObjectBase::is_array_buffer;
using BufferableObjectBase::is_data_view;
using BufferableObjectBase::is_typed_array_base;
};
}