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LibWeb: Make MediaCondition a top-level type and add factory methods

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This commit is contained in:
Sam Atkins 2021-12-30 14:25:30 +00:00 • committed by Andreas Kling
parent ae4f0000c8
commit b6fe7cc324
4 changed files with 93 additions and 57 deletions
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49
Userland/Libraries/LibWeb/CSS/MediaQuery.cpp
View file

@ -139,7 +139,52 @@ bool MediaFeature::evaluate(DOM::Window const& window) const
VERIFY_NOT_REACHED();
}
String MediaQuery::MediaCondition::to_string() const
NonnullOwnPtr<MediaCondition> MediaCondition::from_general_enclosed(GeneralEnclosed&& general_enclosed)
{
auto result = new MediaCondition;
result->type = Type::GeneralEnclosed;
result->general_enclosed = move(general_enclosed);
return adopt_own(*result);
}
NonnullOwnPtr<MediaCondition> MediaCondition::from_feature(MediaFeature&& feature)
{
auto result = new MediaCondition;
result->type = Type::Single;
result->feature = move(feature);
return adopt_own(*result);
}
NonnullOwnPtr<MediaCondition> MediaCondition::from_not(NonnullOwnPtr<MediaCondition>&& condition)
{
auto result = new MediaCondition;
result->type = Type::Not;
result->conditions.append(move(condition));
return adopt_own(*result);
}
NonnullOwnPtr<MediaCondition> MediaCondition::from_and_list(NonnullOwnPtrVector<MediaCondition>&& conditions)
{
auto result = new MediaCondition;
result->type = Type::And;
result->conditions = move(conditions);
return adopt_own(*result);
}
NonnullOwnPtr<MediaCondition> MediaCondition::from_or_list(NonnullOwnPtrVector<MediaCondition>&& conditions)
{
auto result = new MediaCondition;
result->type = Type::Or;
result->conditions = move(conditions);
return adopt_own(*result);
}
String MediaCondition::to_string() const
{
StringBuilder builder;
builder.append('(');
@ -165,7 +210,7 @@ String MediaQuery::MediaCondition::to_string() const
return builder.to_string();
}
MatchResult MediaQuery::MediaCondition::evaluate(DOM::Window const& window) const
MatchResult MediaCondition::evaluate(DOM::Window const& window) const
{
switch (type) {
case Type::Single:

50
Userland/Libraries/LibWeb/CSS/MediaQuery.h
View file

@ -112,6 +112,33 @@ private:
Optional<MediaFeatureValue> m_value {};
};
// https://www.w3.org/TR/mediaqueries-4/#media-conditions
struct MediaCondition {
enum class Type {
Single,
And,
Or,
Not,
GeneralEnclosed,
};
static NonnullOwnPtr<MediaCondition> from_general_enclosed(GeneralEnclosed&&);
static NonnullOwnPtr<MediaCondition> from_feature(MediaFeature&&);
static NonnullOwnPtr<MediaCondition> from_not(NonnullOwnPtr<MediaCondition>&&);
static NonnullOwnPtr<MediaCondition> from_and_list(NonnullOwnPtrVector<MediaCondition>&&);
static NonnullOwnPtr<MediaCondition> from_or_list(NonnullOwnPtrVector<MediaCondition>&&);
MatchResult evaluate(DOM::Window const&) const;
String to_string() const;
private:
MediaCondition() { }
Type type;
Optional<MediaFeature> feature;
NonnullOwnPtrVector<MediaCondition> conditions;
Optional<GeneralEnclosed> general_enclosed;
};
class MediaQuery : public RefCounted<MediaQuery> {
friend class Parser;
@ -135,25 +162,6 @@ public:
Speech,
};
// https://www.w3.org/TR/mediaqueries-4/#media-conditions
struct MediaCondition {
enum class Type {
Single,
And,
Or,
Not,
GeneralEnclosed,
};
Type type;
Optional<MediaFeature> feature;
NonnullOwnPtrVector<MediaCondition> conditions;
Optional<GeneralEnclosed> general_enclosed;
MatchResult evaluate(DOM::Window const&) const;
String to_string() const;
};
static NonnullRefPtr<MediaQuery> create_not_all();
static NonnullRefPtr<MediaQuery> create() { return adopt_ref(*new MediaQuery); }
@ -188,8 +196,8 @@ struct Formatter<Web::CSS::MediaFeature> : Formatter<StringView> {
};
template<>
struct Formatter<Web::CSS::MediaQuery::MediaCondition> : Formatter<StringView> {
ErrorOr<void> format(FormatBuilder& builder, Web::CSS::MediaQuery::MediaCondition const& media_condition)
struct Formatter<Web::CSS::MediaCondition> : Formatter<StringView> {
ErrorOr<void> format(FormatBuilder& builder, Web::CSS::MediaCondition const& media_condition)
{
return Formatter<StringView>::format(builder, media_condition.to_string());
}

49
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
View file

@ -749,7 +749,7 @@ NonnullRefPtr<MediaQuery> Parser::parse_media_query(TokenStream<StyleComponentVa
return invalid_media_query();
}
OwnPtr<MediaQuery::MediaCondition> Parser::consume_media_condition(TokenStream<StyleComponentValueRule>& tokens)
OwnPtr<MediaCondition> Parser::consume_media_condition(TokenStream<StyleComponentValueRule>& tokens)
{
// "not <media-condition>"
// ( `<media-not>` in the grammar )
@ -758,13 +758,8 @@ OwnPtr<MediaQuery::MediaCondition> Parser::consume_media_condition(TokenStream<S
if (first_token.is(Token::Type::Ident) && first_token.token().ident().equals_ignoring_case("not"sv)) {
tokens.next_token();
auto condition = new MediaQuery::MediaCondition;
condition->type = MediaQuery::MediaCondition::Type::Not;
if (auto child_condition = consume_media_condition(tokens)) {
condition->conditions.append(child_condition.release_nonnull());
return adopt_own(*condition);
}
if (auto child_condition = consume_media_condition(tokens))
return MediaCondition::from_not(child_condition.release_nonnull());
tokens.rewind_to_position(position);
return {};
@ -772,16 +767,16 @@ OwnPtr<MediaQuery::MediaCondition> Parser::consume_media_condition(TokenStream<S
// "<media-condition> ([and | or] <media-condition>)*"
// ( `<media-in-parens> [ <media-and>* | <media-or>* ]` in the grammar )
NonnullOwnPtrVector<MediaQuery::MediaCondition> child_conditions;
Optional<MediaQuery::MediaCondition::Type> condition_type {};
auto as_condition_type = [](auto& token) -> Optional<MediaQuery::MediaCondition::Type> {
NonnullOwnPtrVector<MediaCondition> child_conditions;
Optional<MediaCondition::Type> condition_type {};
auto as_condition_type = [](auto& token) -> Optional<MediaCondition::Type> {
if (!token.is(Token::Type::Ident))
return {};
auto ident = token.token().ident();
if (ident.equals_ignoring_case("and"))
return MediaQuery::MediaCondition::Type::And;
return MediaCondition::Type::And;
if (ident.equals_ignoring_case("or"))
return MediaQuery::MediaCondition::Type::Or;
return MediaCondition::Type::Or;
return {};
};
@ -806,10 +801,7 @@ OwnPtr<MediaQuery::MediaCondition> Parser::consume_media_condition(TokenStream<S
tokens.skip_whitespace();
if (auto child_feature = consume_media_feature(tokens); child_feature.has_value()) {
auto child = new MediaQuery::MediaCondition;
child->type = MediaQuery::MediaCondition::Type::Single;
child->feature = child_feature.value();
child_conditions.append(adopt_own(*child));
child_conditions.append(MediaCondition::from_feature(child_feature.release_value()));
} else {
auto& token = tokens.next_token();
if (!token.is_block() || !token.block().is_paren()) {
@ -832,29 +824,20 @@ OwnPtr<MediaQuery::MediaCondition> Parser::consume_media_condition(TokenStream<S
if (child_conditions.size() == 1)
return move(child_conditions.ptr_at(0));
auto condition = new MediaQuery::MediaCondition;
condition->type = condition_type.value();
condition->conditions = move(child_conditions);
return adopt_own(*condition);
if (condition_type.value() == MediaCondition::Type::And)
return MediaCondition::from_and_list(move(child_conditions));
return MediaCondition::from_or_list(move(child_conditions));
}
// `<media-feature>`
tokens.rewind_to_position(position);
if (auto feature = consume_media_feature(tokens); feature.has_value()) {
auto condition = new MediaQuery::MediaCondition;
condition->type = MediaQuery::MediaCondition::Type::Single;
condition->feature = feature.value();
return adopt_own(*condition);
}
if (auto feature = consume_media_feature(tokens); feature.has_value())
return MediaCondition::from_feature(feature.release_value());
// `<general-enclosed>`
tokens.rewind_to_position(position);
if (auto general_enclosed = parse_general_enclosed(tokens); general_enclosed.has_value()) {
auto condition = new MediaQuery::MediaCondition;
condition->type = MediaQuery::MediaCondition::Type::GeneralEnclosed;
condition->general_enclosed = general_enclosed.release_value();
return adopt_own(*condition);
}
if (auto general_enclosed = parse_general_enclosed(tokens); general_enclosed.has_value())
return MediaCondition::from_general_enclosed(general_enclosed.release_value());
tokens.rewind_to_position(position);
return {};

2
Userland/Libraries/LibWeb/CSS/Parser/Parser.h
View file

@ -235,7 +235,7 @@ private:
Result<Selector::SimpleSelector, ParsingResult> parse_simple_selector(TokenStream<StyleComponentValueRule>&);
NonnullRefPtr<MediaQuery> parse_media_query(TokenStream<StyleComponentValueRule>&);
OwnPtr<MediaQuery::MediaCondition> consume_media_condition(TokenStream<StyleComponentValueRule>&);
OwnPtr<MediaCondition> consume_media_condition(TokenStream<StyleComponentValueRule>&);
Optional<MediaFeature> consume_media_feature(TokenStream<StyleComponentValueRule>&);
Optional<MediaQuery::MediaType> consume_media_type(TokenStream<StyleComponentValueRule>&);
Optional<MediaFeatureValue> parse_media_feature_value(TokenStream<StyleComponentValueRule>&);