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LibWeb: Partially implement MediaQuery class :^)

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The main thing that's missing is the actual matching, but this is enough
to get started.
This commit is contained in:
Sam Atkins 2021-09-27 17:12:33 +01:00 • committed by Andreas Kling
parent b90cc1148a
commit 0a4d9c6d31
4 changed files with 233 additions and 0 deletions
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117
Userland/Libraries/LibWeb/CSS/MediaQuery.h Normal file
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/*
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/FlyString.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/NonnullRefPtr.h>
#include <AK/Optional.h>
#include <AK/OwnPtr.h>
#include <AK/RefCounted.h>
#include <LibWeb/CSS/StyleValue.h>
namespace Web::CSS {
class MediaQuery : public RefCounted<MediaQuery> {
friend class Parser;
public:
~MediaQuery() { }
// https://www.w3.org/TR/mediaqueries-4/#media-types
enum class MediaType {
All,
Print,
Screen,
// Deprecated, must never match:
TTY,
TV,
Projection,
Handheld,
Braille,
Embossed,
Aural,
Speech,
};
// https://www.w3.org/TR/mediaqueries-4/#mq-features
struct MediaFeature {
// FIXME: Implement range syntax: https://www.w3.org/TR/mediaqueries-4/#mq-ranges
enum class Type {
IsTrue,
ExactValue,
MinValue,
MaxValue,
};
Type type;
FlyString name;
RefPtr<StyleValue> value { nullptr };
String to_string() const;
};
// https://www.w3.org/TR/mediaqueries-4/#media-conditions
struct MediaCondition {
enum class Type {
Single,
And,
Or,
Not,
};
Type type;
MediaFeature feature;
NonnullOwnPtrVector<MediaCondition> conditions;
String to_string() const;
};
static NonnullRefPtr<MediaQuery> create_not_all();
static NonnullRefPtr<MediaQuery> create() { return adopt_ref(*new MediaQuery); }
String to_string() const;
private:
MediaQuery() { }
// https://www.w3.org/TR/mediaqueries-4/#mq-not
bool m_negated { false };
MediaType m_media_type { MediaType::All };
OwnPtr<MediaCondition> m_media_condition { nullptr };
};
}
namespace AK {
template<>
struct Formatter<Web::CSS::MediaQuery::MediaFeature> : Formatter<StringView> {
void format(FormatBuilder& builder, Web::CSS::MediaQuery::MediaFeature const& media_feature)
{
Formatter<StringView>::format(builder, media_feature.to_string());
}
};
template<>
struct Formatter<Web::CSS::MediaQuery::MediaCondition> : Formatter<StringView> {
void format(FormatBuilder& builder, Web::CSS::MediaQuery::MediaCondition const& media_condition)
{
Formatter<StringView>::format(builder, media_condition.to_string());
}
};
template<>
struct Formatter<Web::CSS::MediaQuery> : Formatter<StringView> {
void format(FormatBuilder& builder, Web::CSS::MediaQuery const& media_query)
{
Formatter<StringView>::format(builder, media_query.to_string());
}
};
}