LibWeb: Add GridTrackPlacementStyleValue

Add GridTrackPlacementStyleValue for the use of CSS properties
grid-column-start, grid-column-end, grid-row-start, grid-row-end.

Userland/Libraries/LibWeb/CSS/StyleValue.cpp

@@ -120,6 +120,12 @@ FrequencyStyleValue const& StyleValue::as_frequency() const
     return static_cast<FrequencyStyleValue const&>(*this);
 }
 
+GridTrackPlacementStyleValue const& StyleValue::as_grid_track_placement() const
+{
+    VERIFY(is_grid_track_placement());
+    return static_cast<GridTrackPlacementStyleValue const&>(*this);
+}
+
 IdentifierStyleValue const& StyleValue::as_identifier() const
 {
     VERIFY(is_identifier());
@@ -1204,6 +1210,19 @@ bool FrequencyStyleValue::equals(StyleValue const& other) const
     return m_frequency == other.as_frequency().m_frequency;
 }
 
+String GridTrackPlacementStyleValue::to_string() const
+{
+    return m_grid_track_placement.to_string();
+}
+
+bool GridTrackPlacementStyleValue::equals(StyleValue const& other) const
+{
+    if (type() != other.type())
+        return false;
+    auto const& typed_other = other.as_grid_track_placement();
+    return m_grid_track_placement == typed_other.grid_track_placement();
+}
+
 String GridTrackSizeStyleValue::to_string() const
 {
     StringBuilder builder;
@@ -1931,6 +1950,11 @@ NonnullRefPtr<ColorStyleValue> ColorStyleValue::create(Color color)
     return adopt_ref(*new ColorStyleValue(color));
 }
 
+NonnullRefPtr<GridTrackPlacementStyleValue> GridTrackPlacementStyleValue::create(CSS::GridTrackPlacement grid_track_placement)
+{
+    return adopt_ref(*new GridTrackPlacementStyleValue(grid_track_placement));
+}
+
 NonnullRefPtr<GridTrackSizeStyleValue> GridTrackSizeStyleValue::create(Vector<CSS::GridTrackSize> grid_track_size)
 {
     return adopt_ref(*new GridTrackSizeStyleValue(grid_track_size));

Userland/Libraries/LibWeb/CSS/StyleValue.h

@@ -28,6 +28,7 @@
 #include <LibWeb/CSS/Display.h>
 #include <LibWeb/CSS/Enums.h>
 #include <LibWeb/CSS/Frequency.h>
+#include <LibWeb/CSS/GridTrackPlacement.h>
 #include <LibWeb/CSS/GridTrackSize.h>
 #include <LibWeb/CSS/Length.h>
 #include <LibWeb/CSS/Number.h>
@@ -131,6 +132,7 @@ public:
         FlexFlow,
         Font,
         Frequency,
+        GridTrackPlacement,
         GridTrackSize,
         Identifier,
         Image,
@@ -173,6 +175,7 @@ public:
     bool is_flex_flow() const { return type() == Type::FlexFlow; }
     bool is_font() const { return type() == Type::Font; }
     bool is_frequency() const { return type() == Type::Frequency; }
+    bool is_grid_track_placement() const { return type() == Type::GridTrackPlacement; }
     bool is_grid_track_size() const { return type() == Type::GridTrackSize; }
     bool is_identifier() const { return type() == Type::Identifier; }
     bool is_image() const { return type() == Type::Image; }
@@ -213,6 +216,7 @@ public:
     FlexStyleValue const& as_flex() const;
     FontStyleValue const& as_font() const;
     FrequencyStyleValue const& as_frequency() const;
+    GridTrackPlacementStyleValue const& as_grid_track_placement() const;
     GridTrackSizeStyleValue const& as_grid_track_size() const;
     IdentifierStyleValue const& as_identifier() const;
     ImageStyleValue const& as_image() const;
@@ -251,6 +255,7 @@ public:
     FlexStyleValue& as_flex() { return const_cast<FlexStyleValue&>(const_cast<StyleValue const&>(*this).as_flex()); }
     FontStyleValue& as_font() { return const_cast<FontStyleValue&>(const_cast<StyleValue const&>(*this).as_font()); }
     FrequencyStyleValue& as_frequency() { return const_cast<FrequencyStyleValue&>(const_cast<StyleValue const&>(*this).as_frequency()); }
+    GridTrackPlacementStyleValue& as_grid_track_placement() { return const_cast<GridTrackPlacementStyleValue&>(const_cast<StyleValue const&>(*this).as_grid_track_placement()); }
     GridTrackSizeStyleValue& as_grid_track_size() { return const_cast<GridTrackSizeStyleValue&>(const_cast<StyleValue const&>(*this).as_grid_track_size()); }
     IdentifierStyleValue& as_identifier() { return const_cast<IdentifierStyleValue&>(const_cast<StyleValue const&>(*this).as_identifier()); }
     ImageStyleValue& as_image() { return const_cast<ImageStyleValue&>(const_cast<StyleValue const&>(*this).as_image()); }
@@ -902,6 +907,25 @@ private:
     Frequency m_frequency;
 };
 
+class GridTrackPlacementStyleValue final : public StyleValue {
+public:
+    static NonnullRefPtr<GridTrackPlacementStyleValue> create(CSS::GridTrackPlacement grid_track_placement);
+    virtual ~GridTrackPlacementStyleValue() override = default;
+
+    CSS::GridTrackPlacement const& grid_track_placement() const { return m_grid_track_placement; }
+    virtual String to_string() const override;
+    virtual bool equals(StyleValue const& other) const override;
+
+private:
+    explicit GridTrackPlacementStyleValue(CSS::GridTrackPlacement grid_track_placement)
+        : StyleValue(Type::GridTrackPlacement)
+        , m_grid_track_placement(grid_track_placement)
+    {
+    }
+
+    CSS::GridTrackPlacement m_grid_track_placement;
+};
+
 class GridTrackSizeStyleValue final : public StyleValue {
 public:
     static NonnullRefPtr<GridTrackSizeStyleValue> create(Vector<CSS::GridTrackSize> grid_track_size);

Userland/Libraries/LibWeb/Forward.h

@@ -58,6 +58,7 @@ class Frequency;
 class FrequencyPercentage;
 class FrequencyStyleValue;
 class GridTrackPlacement;
+class GridTrackPlacementStyleValue;
 class GridTrackSize;
 class GridTrackSizeStyleValue;
 class IdentifierStyleValue;