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LibWeb: Store Repeat values directly in BackgroundRepeatStyleValue

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...as opposed to storing StyleValues, which we have to later check are
IdentifierStyleValues, which store identifiers that we can convert to
Repeat values later. It's fewer allocations, and we can't end up with
invalid values by mistake. :^)
This commit is contained in:
Sam Atkins 2021-11-04 17:38:11 +00:00 • committed by Andreas Kling
parent 901a990b1b
commit 891dd46a17
4 changed files with 47 additions and 50 deletions
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23
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -2702,6 +2702,21 @@ RefPtr<StyleValue> Parser::parse_single_background_repeat_value(ParsingContext c
return value_id == ValueID::RepeatX || value_id == ValueID::RepeatY;
};
auto as_repeat = [](ValueID identifier) {
switch (identifier) {
case ValueID::NoRepeat:
return Repeat::NoRepeat;
case ValueID::Repeat:
return Repeat::Repeat;
case ValueID::Round:
return Repeat::Round;
case ValueID::Space:
return Repeat::Space;
default:
VERIFY_NOT_REACHED();
}
};
auto& token = tokens.next_token();
auto maybe_x_value = parse_css_value(context, token);
if (!maybe_x_value || !property_accepts_value(PropertyID::BackgroundRepeat, *maybe_x_value))
@ -2711,8 +2726,8 @@ RefPtr<StyleValue> Parser::parse_single_background_repeat_value(ParsingContext c
if (is_directional_repeat(*x_value)) {
auto value_id = x_value->to_identifier();
return BackgroundRepeatStyleValue::create(
IdentifierStyleValue::create(value_id == ValueID::RepeatX ? ValueID::Repeat : ValueID::NoRepeat),
IdentifierStyleValue::create(value_id == ValueID::RepeatX ? ValueID::NoRepeat : ValueID::Repeat));
value_id == ValueID::RepeatX ? Repeat::Repeat : Repeat::NoRepeat,
value_id == ValueID::RepeatX ? Repeat::NoRepeat : Repeat::Repeat);
}
// See if we have a second value for Y
@ -2720,13 +2735,13 @@ RefPtr<StyleValue> Parser::parse_single_background_repeat_value(ParsingContext c
auto maybe_y_value = parse_css_value(context, second_token);
if (!maybe_y_value || !property_accepts_value(PropertyID::BackgroundRepeat, *maybe_y_value)) {
// We don't have a second value, so use x for both
return BackgroundRepeatStyleValue::create(x_value, x_value);
return BackgroundRepeatStyleValue::create(as_repeat(x_value->to_identifier()), as_repeat(x_value->to_identifier()));
}
tokens.next_token();
auto y_value = maybe_y_value.release_nonnull();
if (is_directional_repeat(*y_value))
return error();
return BackgroundRepeatStyleValue::create(x_value, y_value);
return BackgroundRepeatStyleValue::create(as_repeat(x_value->to_identifier()), as_repeat(y_value->to_identifier()));
}
RefPtr<StyleValue> Parser::parse_background_repeat_value(ParsingContext const& context, Vector<StyleComponentValueRule> const& component_values)