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LibWeb: Teach CSS::StyleProperties to create CSS::Size values

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You can now use StyleProperties::size_value(CSS::PropertyID) to extract
a CSS::Size for a given property.
This commit is contained in:
Andreas Kling 2022-09-25 15:47:40 +02:00
parent ba78fe008f
commit 844321d89f
3 changed files with 40 additions and 1 deletions
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38
Userland/Libraries/LibWeb/CSS/StyleProperties.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
@ -44,6 +44,42 @@ NonnullRefPtr<StyleValue> StyleProperties::property(CSS::PropertyID property_id)
return value.release_nonnull();
}
CSS::Size StyleProperties::size_value(CSS::PropertyID id) const
{
auto value = property(id);
if (value->is_identifier()) {
switch (value->to_identifier()) {
case ValueID::Auto:
return CSS::Size::make_auto();
case ValueID::MinContent:
return CSS::Size::make_min_content();
case ValueID::MaxContent:
return CSS::Size::make_max_content();
case ValueID::None:
return CSS::Size::make_none();
default:
VERIFY_NOT_REACHED();
}
}
if (value->is_calculated())
return CSS::Size::make_length(CSS::Length::make_calculated(value->as_calculated()));
if (value->is_percentage())
return CSS::Size::make_percentage(value->as_percentage().percentage());
if (value->has_length()) {
auto length = value->to_length();
if (length.is_auto())
return CSS::Size::make_auto();
return CSS::Size::make_length(value->to_length());
}
// FIXME: Support `fit-content(<length>)`
dbgln("FIXME: Unsupported size value: `{}`, treating as `auto`", value->to_string());
return CSS::Size::make_auto();
}
Length StyleProperties::length_or_fallback(CSS::PropertyID id, Length const& fallback) const
{
auto value = property(id);