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LibWeb: Add helper to convert CSS LengthPercentage to SVGLength

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MacDue 2024-03-03 20:33:40 +00:00 committed by Andreas Kling
parent 4f78ddd6a2
commit 344eb98b3c
Notes: sideshowbarker 2024-07-16 20:31:50 +09:00 
Author: https://github.com/MacDue
Commit: https://github.com/SerenityOS/serenity/commit/344eb98b3c
Pull-request: https://github.com/SerenityOS/serenity/pull/23455
Issue: https://github.com/SerenityOS/serenity/issues/23121
2 changed files with 50 additions and 0 deletions
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48
Userland/Libraries/LibWeb/SVG/SVGLength.cpp
View file

@ -5,17 +5,65 @@
*/
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/CSS/PercentageOr.h>
#include <LibWeb/SVG/SVGLength.h>
namespace Web::SVG {
JS_DEFINE_ALLOCATOR(SVGLength);
// Same as SVGLength.idl
constexpr unsigned short SVG_LENGTHTYPE_UNKNOWN = 0;
constexpr unsigned short SVG_LENGTHTYPE_NUMBER = 1;
constexpr unsigned short SVG_LENGTHTYPE_PERCENTAGE = 2;
constexpr unsigned short SVG_LENGTHTYPE_EMS = 3;
constexpr unsigned short SVG_LENGTHTYPE_EXS = 4;
constexpr unsigned short SVG_LENGTHTYPE_PX = 5;
constexpr unsigned short SVG_LENGTHTYPE_CM = 6;
constexpr unsigned short SVG_LENGTHTYPE_MM = 7;
constexpr unsigned short SVG_LENGTHTYPE_IN = 8;
constexpr unsigned short SVG_LENGTHTYPE_PT = 9;
constexpr unsigned short SVG_LENGTHTYPE_PC = 10;
JS::NonnullGCPtr<SVGLength> SVGLength::create(JS::Realm& realm, u8 unit_type, float value)
{
return realm.heap().allocate<SVGLength>(realm, realm, unit_type, value);
}
JS::NonnullGCPtr<SVGLength> SVGLength::from_length_percentage(JS::Realm& realm, CSS::LengthPercentage const& length_percentage)
{
// FIXME: We can't tell if a CSS::LengthPercentage was a unitless length.
(void)SVG_LENGTHTYPE_NUMBER;
if (length_percentage.is_percentage())
return SVGLength::create(realm, SVG_LENGTHTYPE_PERCENTAGE, length_percentage.percentage().value());
if (length_percentage.is_length())
return SVGLength::create(
realm, [&] {
switch (length_percentage.length().type()) {
case CSS::Length::Type::Em:
return SVG_LENGTHTYPE_EMS;
case CSS::Length::Type::Ex:
return SVG_LENGTHTYPE_EXS;
case CSS::Length::Type::Px:
return SVG_LENGTHTYPE_PX;
case CSS::Length::Type::Cm:
return SVG_LENGTHTYPE_CM;
case CSS::Length::Type::Mm:
return SVG_LENGTHTYPE_MM;
case CSS::Length::Type::In:
return SVG_LENGTHTYPE_IN;
case CSS::Length::Type::Pt:
return SVG_LENGTHTYPE_PT;
case CSS::Length::Type::Pc:
return SVG_LENGTHTYPE_PC;
default:
return SVG_LENGTHTYPE_UNKNOWN;
}
}(),
length_percentage.length().raw_value());
return SVGLength::create(realm, SVG_LENGTHTYPE_UNKNOWN, 0);
}
SVGLength::SVGLength(JS::Realm& realm, u8 unit_type, float value)
: PlatformObject(realm)
, m_unit_type(unit_type)

2
Userland/Libraries/LibWeb/SVG/SVGLength.h
View file

@ -25,6 +25,8 @@ public:
float value() const { return m_value; }
WebIDL::ExceptionOr<void> set_value(float value);
[[nodiscard]] static JS::NonnullGCPtr<SVGLength> from_length_percentage(JS::Realm&, CSS::LengthPercentage const&);
private:
SVGLength(JS::Realm&, u8 unit_type, float value);