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LibWeb: Add serialize_a_srgb_value()

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This moves the logic from ColorStyleValue::to_string() to a standalone
function.
This commit is contained in:
MacDue 2022-07-12 15:30:13 +01:00 • committed by Sam Atkins
parent aa9f7cc597
commit 8603541e56
3 changed files with 23 additions and 7 deletions
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8
Userland/Libraries/LibWeb/CSS/StyleValue.cpp
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@ -1071,15 +1071,9 @@ CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcNumberSumPartW
return value->resolve(layout_node, percentage_basis);
}
// https://www.w3.org/TR/css-color-4/#serializing-sRGB-values
String ColorStyleValue::to_string() const
{
// The serialized form is derived from the computed value and thus, uses either the rgb() or rgba() form
// (depending on whether the alpha is exactly 1, or not), with lowercase letters for the function name.
// NOTE: Since we use Gfx::Color, having an "alpha of 1" means its value is 255.
if (m_color.alpha() == 255)
return String::formatted("rgb({}, {}, {})", m_color.red(), m_color.green(), m_color.blue());
return String::formatted("rgba({}, {}, {}, {})", m_color.red(), m_color.green(), m_color.blue(), (float)(m_color.alpha()) / 255.0f);
return serialize_a_srgb_value(m_color);
}
bool ColorStyleValue::equals(StyleValue const& other) const