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LibCore: Add Resource for platform agnostic application resource loading

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The first implementation is simply raw files.
This commit is contained in:
Andrew Kaster 2023-10-02 14:36:53 -06:00 • committed by Andrew Kaster
parent f4a89c31c6
commit 0d417cd604
8 changed files with 393 additions and 0 deletions
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88
Userland/Libraries/LibCore/Resource.cpp Normal file
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/*
* Copyright (c) 2023, Andrew Kaster <akaster@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/LexicalPath.h>
#include <LibCore/Resource.h>
#include <LibCore/ResourceImplementation.h>
namespace Core {
Resource::Resource(String path, Scheme scheme, NonnullOwnPtr<Core::MappedFile> file)
: m_path(move(path))
, m_scheme(scheme)
, m_data(move(file))
{
}
Resource::Resource(String path, Scheme scheme, ByteBuffer buffer)
: m_path(move(path))
, m_scheme(scheme)
, m_data(move(buffer))
{
}
Resource::Resource(String path, Scheme scheme, DirectoryTag)
: m_path(move(path))
, m_scheme(scheme)
, m_data(DirectoryTag {})
{
}
ErrorOr<NonnullRefPtr<Resource>> Resource::load_from_uri(StringView uri)
{
return ResourceImplementation::the().load_from_uri(uri);
}
[[nodiscard]] String Resource::uri() const
{
return MUST(String::formatted("{}://{}", m_scheme == Scheme::Resource ? "resource"sv : "file"sv, m_path));
}
[[nodiscard]] Optional<String> Resource::filesystem_path() const
{
return ResourceImplementation::the().filesystem_path(*this);
}
[[nodiscard]] String Resource::filename() const
{
return MUST(String::from_utf8(LexicalPath(m_path.bytes_as_string_view()).basename()));
}
[[nodiscard]] Vector<String> Resource::children() const
{
return ResourceImplementation::the().child_names(*this);
}
[[nodiscard]] ByteBuffer Resource::clone_data() const
{
return m_data.visit(
[](NonnullOwnPtr<Core::MappedFile> const& file) { return MUST(ByteBuffer::copy(file->bytes())); },
[](ByteBuffer const& buffer) { return buffer; },
[](DirectoryTag) -> ByteBuffer { VERIFY_NOT_REACHED(); });
}
[[nodiscard]] ByteBuffer Resource::release_data() &&
{
VERIFY(!m_data.has<DirectoryTag>());
if (m_data.has<NonnullOwnPtr<Core::MappedFile>>())
return MUST(ByteBuffer::copy(m_data.get<NonnullOwnPtr<Core::MappedFile>>()->bytes()));
return move(m_data).get<ByteBuffer>();
}
[[nodiscard]] ReadonlyBytes Resource::data() const
{
return m_data.visit(
[](NonnullOwnPtr<Core::MappedFile> const& file) { return file->bytes(); },
[](ByteBuffer const& buffer) { return buffer.bytes(); },
[](DirectoryTag) -> ReadonlyBytes { VERIFY_NOT_REACHED(); });
}
[[nodiscard]] FixedMemoryStream Resource::stream() const
{
return FixedMemoryStream(data());
}
}