LibWeb: Add 'object-fit' property

This patch adds support for the 'object-fit' CSS property. :^)

Userland/Libraries/LibWeb/CSS/ComputedValues.h

@@ -106,6 +106,7 @@ public:
     static CSS::BorderCollapse border_collapse() { return CSS::BorderCollapse::Separate; }
     static Vector<Vector<String>> grid_template_areas() { return {}; }
     static CSS::Time transition_delay() { return CSS::Time::make_seconds(0); }
+    static CSS::ObjectFit object_fit() { return CSS::ObjectFit::Fill; }
 };
 
 enum class BackgroundSize {

Userland/Libraries/LibWeb/CSS/Enums.json

@@ -238,6 +238,13 @@
         "inside",
         "outside"
     ],
+    "object-fit": [
+      "fill",
+      "contain",
+      "cover",
+      "none",
+      "scale-down"
+    ],
     "overflow": [
         "auto",
         "clip",

Userland/Libraries/LibWeb/CSS/Identifiers.json

@@ -131,6 +131,7 @@
   "fantasy",
   "fast",
   "fine",
+  "fill",
   "fit-content",
   "fixed",
   "flex",
@@ -262,6 +263,7 @@
   "s-resize",
   "safe",
   "sans-serif",
+  "scale-down",
   "scroll",
   "se-resize",
   "self-end",

Userland/Libraries/LibWeb/CSS/Properties.json

@@ -1559,6 +1559,13 @@
       "unitless-length"
     ]
   },
+  "object-fit": {
+    "inherited": false,
+    "initial": "fill",
+    "valid-types": [
+      "object-fit"
+    ]
+  },
   "opacity": {
     "affects-layout": false,
     "affects-stacking-context": true,

Userland/Libraries/LibWeb/CSS/StyleProperties.cpp

@@ -937,6 +937,12 @@ String StyleProperties::grid_area() const
     return value->as_string().to_string().release_value_but_fixme_should_propagate_errors();
 }
 
+Optional<CSS::ObjectFit> StyleProperties::object_fit() const
+{
+    auto value = property(CSS::PropertyID::ObjectFit);
+    return value_id_to_object_fit(value->to_identifier());
+}
+
 Color StyleProperties::stop_color() const
 {
     auto value = property(CSS::PropertyID::StopColor);

Userland/Libraries/LibWeb/CSS/StyleProperties.h

@@ -110,6 +110,7 @@ public:
     Optional<CSS::BorderCollapse> border_collapse() const;
     Vector<Vector<String>> grid_template_areas() const;
     String grid_area() const;
+    Optional<CSS::ObjectFit> object_fit() const;
 
     Vector<CSS::Transformation> transformations() const;
     CSS::TransformOrigin transform_origin() const;