LibWeb: Add initial version of pointer-events CSS property

Userland/Libraries/LibWeb/CSS/ComputedValues.h

@@ -33,6 +33,7 @@ public:
     static CSS::AlignItems align_items() { return CSS::AlignItems::FlexStart; }
     static CSS::Overflow overflow() { return CSS::Overflow::Visible; }
     static CSS::BoxSizing box_sizing() { return CSS::BoxSizing::ContentBox; }
+    static CSS::PointerEvents pointer_events() { return CSS::PointerEvents::Auto; }
 };
 
 struct BorderData {
@@ -64,6 +65,7 @@ public:
     CSS::Float float_() const { return m_noninherited.float_; }
     CSS::Clear clear() const { return m_noninherited.clear; }
     CSS::Cursor cursor() const { return m_inherited.cursor; }
+    CSS::PointerEvents pointer_events() const { return m_inherited.pointer_events; }
     CSS::Display display() const { return m_noninherited.display; }
     Optional<int> const& z_index() const { return m_noninherited.z_index; }
     CSS::TextAlign text_align() const { return m_inherited.text_align; }
@@ -129,6 +131,7 @@ protected:
     struct {
         Color color { InitialValues::color() };
         CSS::Cursor cursor { InitialValues::cursor() };
+        CSS::PointerEvents pointer_events { InitialValues::pointer_events() };
         CSS::TextAlign text_align { InitialValues::text_align() };
         CSS::TextTransform text_transform { InitialValues::text_transform() };
         CSS::WhiteSpace white_space { InitialValues::white_space() };
@@ -189,6 +192,7 @@ class MutableComputedValues final : public ComputedValues {
 public:
     void set_color(const Color& color) { m_inherited.color = color; }
     void set_cursor(CSS::Cursor cursor) { m_inherited.cursor = cursor; }
+    void set_pointer_events(CSS::PointerEvents value) { m_inherited.pointer_events = value; }
     void set_background_color(const Color& color) { m_noninherited.background_color = color; }
     void set_background_repeat_x(CSS::Repeat repeat) { m_noninherited.background_repeat_x = repeat; }
     void set_background_repeat_y(CSS::Repeat repeat) { m_noninherited.background_repeat_y = repeat; }

Userland/Libraries/LibWeb/CSS/Properties.json

@@ -1073,7 +1073,11 @@
   },
   "pointer-events": {
     "inherited": true,
-    "initial": "auto"
+    "initial": "auto",
+    "valid-identifiers": [
+      "auto",
+      "none"
+    ]
   },
   "position": {
     "inherited": false,

Userland/Libraries/LibWeb/CSS/StyleProperties.cpp

@@ -355,6 +355,22 @@ Optional<CSS::TextAlign> StyleProperties::text_align() const
     }
 }
 
+Optional<CSS::PointerEvents> StyleProperties::pointer_events() const
+{
+    auto value = property(CSS::PropertyID::PointerEvents);
+    if (!value.has_value())
+        return {};
+
+    switch (value.value()->to_identifier()) {
+    case CSS::ValueID::Auto:
+        return CSS::PointerEvents::Auto;
+    case CSS::ValueID::None:
+        return CSS::PointerEvents::None;
+    default:
+        return {};
+    }
+}
+
 Optional<CSS::WhiteSpace> StyleProperties::white_space() const
 {
     auto value = property(CSS::PropertyID::WhiteSpace);

Userland/Libraries/LibWeb/CSS/StyleProperties.h

@@ -67,6 +67,7 @@ public:
     Optional<CSS::Repeat> background_repeat_y() const;
     Optional<CSS::BoxShadowData> box_shadow() const;
     CSS::BoxSizing box_sizing() const;
+    Optional<CSS::PointerEvents> pointer_events() const;
 
     Vector<CSS::Transformation> transformations() const;
 

Userland/Libraries/LibWeb/CSS/StyleValue.h

@@ -211,6 +211,11 @@ enum class WhiteSpace {
     PreWrap,
 };
 
+enum class PointerEvents {
+    Auto,
+    None
+};
+
 class StyleValue : public RefCounted<StyleValue> {
 public:
     virtual ~StyleValue();