LibWeb: Remove StyleValue::has/to_number()

Only NumericStyleValue holds numbers.

Renamed `to_number()` to `number()` because it's just a getter now.

Userland/Libraries/LibWeb/CSS/StyleProperties.cpp

@@ -15,6 +15,7 @@
 #include <LibWeb/CSS/StyleValues/GridTemplateAreaStyleValue.h>
 #include <LibWeb/CSS/StyleValues/GridTrackPlacementStyleValue.h>
 #include <LibWeb/CSS/StyleValues/GridTrackSizeListStyleValue.h>
+#include <LibWeb/CSS/StyleValues/NumericStyleValue.h>
 #include <LibWeb/CSS/StyleValues/PercentageStyleValue.h>
 #include <LibWeb/CSS/StyleValues/RectStyleValue.h>
 #include <LibWeb/CSS/StyleValues/ShadowStyleValue.h>
@@ -170,7 +171,7 @@ CSSPixels StyleProperties::line_height(CSSPixelRect const& viewport_rect, Length
     }
 
     if (line_height->is_numeric())
-        return Length(line_height->to_number(), Length::Type::Em).to_px(viewport_rect, font_metrics, root_font_metrics);
+        return Length(line_height->as_numeric().number(), Length::Type::Em).to_px(viewport_rect, font_metrics, root_font_metrics);
 
     if (line_height->is_percentage()) {
         // Percentages are relative to 1em. https://www.w3.org/TR/css-inline-3/#valdef-line-height-percentage
@@ -200,7 +201,7 @@ CSSPixels StyleProperties::line_height(Layout::Node const& layout_node) const
     }
 
     if (line_height->is_numeric())
-        return Length(line_height->to_number(), Length::Type::Em).to_px(layout_node);
+        return Length(line_height->as_numeric().number(), Length::Type::Em).to_px(layout_node);
 
     if (line_height->is_percentage()) {
         // Percentages are relative to 1em. https://www.w3.org/TR/css-inline-3/#valdef-line-height-percentage
@@ -242,8 +243,8 @@ static float resolve_opacity_value(CSS::StyleValue const& value)
 {
     float unclamped_opacity = 1.0f;
 
-    if (value.has_number()) {
-        unclamped_opacity = value.to_number();
+    if (value.is_numeric()) {
+        unclamped_opacity = value.as_numeric().number();
     } else if (value.is_calculated()) {
         auto& calculated = value.as_calculated();
         if (calculated.resolved_type() == CalculatedStyleValue::ResolvedType::Percentage) {
@@ -327,17 +328,17 @@ Optional<CSS::FlexBasisData> StyleProperties::flex_basis() const
 float StyleProperties::flex_grow() const
 {
     auto value = property(CSS::PropertyID::FlexGrow);
-    if (!value->has_number())
+    if (!value->is_numeric())
         return 0;
-    return value->to_number();
+    return value->as_numeric().number();
 }
 
 float StyleProperties::flex_shrink() const
 {
     auto value = property(CSS::PropertyID::FlexShrink);
-    if (!value->has_number())
+    if (!value->is_numeric())
         return 1;
-    return value->to_number();
+    return value->as_numeric().number();
 }
 
 int StyleProperties::order() const
@@ -395,7 +396,7 @@ Vector<CSS::Transformation> StyleProperties::transformations() const
             } else if (transformation_value->is_percentage()) {
                 values.append({ transformation_value->as_percentage().percentage() });
             } else if (transformation_value->is_numeric()) {
-                values.append({ transformation_value->to_number() });
+                values.append({ transformation_value->as_numeric().number() });
             } else if (transformation_value->is_angle()) {
                 values.append({ transformation_value->as_angle().angle() });
             } else {

Userland/Libraries/LibWeb/CSS/StyleValue.h

@@ -294,7 +294,6 @@ public:
     bool has_auto() const;
     virtual bool has_color() const { return false; }
     virtual bool has_length() const { return false; }
-    virtual bool has_number() const { return false; }
     virtual bool has_integer() const { return false; }
 
     virtual ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const;
@@ -302,7 +301,6 @@ public:
     virtual Color to_color(Optional<Layout::NodeWithStyle const&>) const { return {}; }
     ValueID to_identifier() const;
     virtual Length to_length() const { VERIFY_NOT_REACHED(); }
-    virtual float to_number() const { return 0; }
     virtual float to_integer() const { return 0; }
     virtual ErrorOr<String> to_string() const = 0;
 

Userland/Libraries/LibWeb/CSS/StyleValues/NumericStyleValue.h

@@ -25,11 +25,10 @@ public:
         return adopt_nonnull_ref_or_enomem(new (nothrow) NumericStyleValue(value));
     }
 
-    virtual bool has_length() const override { return to_number() == 0; }
+    virtual bool has_length() const override { return number() == 0; }
     virtual Length to_length() const override { return Length::make_px(0); }
 
-    virtual bool has_number() const override { return true; }
-    virtual float to_number() const override
+    float number() const
     {
         return m_value.visit(
             [](float value) { return value; },

Userland/Libraries/LibWeb/Layout/Node.cpp

@@ -10,6 +10,7 @@
 #include <LibWeb/CSS/StyleValues/BackgroundSizeStyleValue.h>
 #include <LibWeb/CSS/StyleValues/BorderRadiusStyleValue.h>
 #include <LibWeb/CSS/StyleValues/EdgeStyleValue.h>
+#include <LibWeb/CSS/StyleValues/NumericStyleValue.h>
 #include <LibWeb/CSS/StyleValues/PercentageStyleValue.h>
 #include <LibWeb/CSS/StyleValues/StyleValueList.h>
 #include <LibWeb/CSS/StyleValues/URLStyleValue.h>
@@ -676,7 +677,7 @@ void NodeWithStyle::apply_style(const CSS::StyleProperties& computed_style)
     // FIXME: Converting to pixels isn't really correct - values should be in "user units"
     //        https://svgwg.org/svg2-draft/coords.html#TermUserUnits
     if (stroke_width->is_numeric())
-        computed_values.set_stroke_width(CSS::Length::make_px(stroke_width->to_number()));
+        computed_values.set_stroke_width(CSS::Length::make_px(stroke_width->as_numeric().number()));
     else if (stroke_width->is_length())
         computed_values.set_stroke_width(stroke_width->to_length());
     else if (stroke_width->is_percentage())