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LibWeb: Add class to represent "list of available images" from HTML spec

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Andreas Kling 2023-05-11 06:12:45 +02:00
parent 596eabe9e6
commit 9281bf7a01
6 changed files with 158 additions and 0 deletions
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71
Userland/Libraries/LibWeb/HTML/ListOfAvailableImages.h Normal file
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/*
* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/HashMap.h>
#include <AK/URL.h>
#include <LibJS/Heap/Cell.h>
#include <LibWeb/Forward.h>
#include <LibWeb/HTML/CORSSettingAttribute.h>
#include <LibWeb/HTML/Origin.h>
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/images.html#list-of-available-images
class ListOfAvailableImages {
public:
struct Key {
AK::URL url;
HTML::CORSSettingAttribute mode;
Optional<HTML::Origin> origin;
[[nodiscard]] bool operator==(Key const& other) const;
[[nodiscard]] u32 hash() const;
private:
mutable Optional<u32> cached_hash;
};
struct Entry final : public RefCounted<Entry> {
static ErrorOr<NonnullRefPtr<Entry>> create(NonnullRefPtr<DecodedImageData>, bool ignore_higher_layer_caching);
~Entry();
bool ignore_higher_layer_caching { false };
NonnullRefPtr<DecodedImageData> image_data;
private:
Entry(NonnullRefPtr<DecodedImageData>, bool ignore_higher_layer_caching);
};
ListOfAvailableImages();
~ListOfAvailableImages();
ErrorOr<void> add(Key const&, NonnullRefPtr<DecodedImageData>, bool ignore_higher_layer_caching);
void remove(Key const&);
[[nodiscard]] RefPtr<Entry> get(Key const&) const;
private:
HashMap<Key, NonnullRefPtr<Entry>> m_images;
};
}
namespace AK {
template<>
struct Traits<Web::HTML::ListOfAvailableImages::Key> : public GenericTraits<Web::HTML::ListOfAvailableImages::Key> {
static unsigned hash(Web::HTML::ListOfAvailableImages::Key const& key)
{
return key.hash();
}
static bool equals(Web::HTML::ListOfAvailableImages::Key const& a, Web::HTML::ListOfAvailableImages::Key const& b)
{
return a == b;
}
};
}