LibWeb: Parse grid-template-areas CSS property

Userland/Libraries/LibWeb/CSS/ComputedValues.h

@@ -73,6 +73,7 @@ public:
     static CSS::Size column_gap() { return CSS::Size::make_auto(); }
     static CSS::Size row_gap() { return CSS::Size::make_auto(); }
     static CSS::BorderCollapse border_collapse() { return CSS::BorderCollapse::Separate; }
+    static Vector<Vector<String>> grid_template_areas() { return {}; }
 };
 
 struct BackgroundLayerData {
@@ -194,6 +195,7 @@ public:
     CSS::Size const& column_gap() const { return m_noninherited.column_gap; }
     CSS::Size const& row_gap() const { return m_noninherited.row_gap; }
     CSS::BorderCollapse border_collapse() const { return m_noninherited.border_collapse; }
+    Vector<Vector<String>> const& grid_template_areas() const { return m_noninherited.grid_template_areas; }
 
     CSS::LengthBox const& inset() const { return m_noninherited.inset; }
     const CSS::LengthBox& margin() const { return m_noninherited.margin; }
@@ -319,6 +321,7 @@ protected:
         CSS::Size column_gap { InitialValues::column_gap() };
         CSS::Size row_gap { InitialValues::row_gap() };
         CSS::BorderCollapse border_collapse { InitialValues::border_collapse() };
+        Vector<Vector<String>> grid_template_areas { InitialValues::grid_template_areas() };
     } m_noninherited;
 };
 
@@ -400,6 +403,7 @@ public:
     void set_column_gap(CSS::Size const& column_gap) { m_noninherited.column_gap = column_gap; }
     void set_row_gap(CSS::Size const& row_gap) { m_noninherited.row_gap = row_gap; }
     void set_border_collapse(CSS::BorderCollapse const& border_collapse) { m_noninherited.border_collapse = border_collapse; }
+    void set_grid_template_areas(Vector<Vector<String>> const& grid_template_areas) { m_noninherited.grid_template_areas = grid_template_areas; }
 
     void set_fill(Color value) { m_inherited.fill = value; }
     void set_stroke(Color value) { m_inherited.stroke = value; }

Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp

@@ -6292,6 +6292,22 @@ RefPtr<StyleValue> Parser::parse_grid_track_placement_shorthand_value(Vector<Com
     return {};
 }
 
+RefPtr<StyleValue> Parser::parse_grid_template_areas_value(Vector<ComponentValue> const& component_values)
+{
+    Vector<Vector<String>> grid_area_rows;
+    for (auto& component_value : component_values) {
+        Vector<String> grid_area_columns;
+        if (component_value.is(Token::Type::String)) {
+            auto const parts = String::from_utf8(component_value.token().string()).release_value_but_fixme_should_propagate_errors().split(' ').release_value_but_fixme_should_propagate_errors();
+            for (auto& part : parts) {
+                grid_area_columns.append(part);
+            }
+        }
+        grid_area_rows.append(move(grid_area_columns));
+    }
+    return GridTemplateAreaStyleValue::create(grid_area_rows);
+}
+
 Parser::ParseErrorOr<NonnullRefPtr<StyleValue>> Parser::parse_css_value(PropertyID property_id, TokenStream<ComponentValue>& tokens)
 {
     auto function_contains_var_or_attr = [](Function const& function, auto&& recurse) -> bool {
@@ -6430,6 +6446,10 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue>> Parser::parse_css_value(Property
         if (auto parsed_value = parse_grid_track_placement_shorthand_value(component_values))
             return parsed_value.release_nonnull();
         return ParseError::SyntaxError;
+    case PropertyID::GridTemplateAreas:
+        if (auto parsed_value = parse_grid_template_areas_value(component_values))
+            return parsed_value.release_nonnull();
+        return ParseError::SyntaxError;
     case PropertyID::GridColumnEnd:
         if (auto parsed_value = parse_grid_track_placement(component_values))
             return parsed_value.release_nonnull();

Userland/Libraries/LibWeb/CSS/Parser/Parser.h

@@ -315,6 +315,7 @@ private:
     RefPtr<StyleValue> parse_grid_track_sizes(Vector<ComponentValue> const&);
     RefPtr<StyleValue> parse_grid_track_placement(Vector<ComponentValue> const&);
     RefPtr<StyleValue> parse_grid_track_placement_shorthand_value(Vector<ComponentValue> const&);
+    RefPtr<StyleValue> parse_grid_template_areas_value(Vector<ComponentValue> const&);
 
     // calc() parsing, according to https://www.w3.org/TR/css-values-3/#calc-syntax
     OwnPtr<CalculatedStyleValue::CalcSum> parse_calc_sum(TokenStream<ComponentValue>&);

Userland/Libraries/LibWeb/CSS/Properties.json

@@ -855,6 +855,16 @@
       "string"
     ]
   },
+  "grid-template-areas": {
+    "inherited": false,
+    "initial": "auto",
+    "valid-identifiers": [
+      "auto"
+    ],
+    "valid-types": [
+      "string"
+    ]
+  },
   "grid-template-columns": {
     "inherited": false,
     "initial": "auto",

Userland/Libraries/LibWeb/CSS/StyleProperties.cpp

@@ -745,4 +745,10 @@ Optional<CSS::BorderCollapse> StyleProperties::border_collapse() const
     return value_id_to_border_collapse(value->to_identifier());
 }
 
+Vector<Vector<String>> StyleProperties::grid_template_areas() const
+{
+    auto value = property(CSS::PropertyID::GridTemplateAreas);
+    return value->as_grid_template_area().grid_template_area();
+}
+
 }

Userland/Libraries/LibWeb/CSS/StyleProperties.h

@@ -91,6 +91,7 @@ public:
     CSS::GridTrackPlacement grid_row_end() const;
     CSS::GridTrackPlacement grid_row_start() const;
     Optional<CSS::BorderCollapse> border_collapse() const;
+    Vector<Vector<String>> grid_template_areas() const;
 
     Vector<CSS::Transformation> transformations() const;
     CSS::TransformOrigin transform_origin() const;

Userland/Libraries/LibWeb/CSS/StyleValue.cpp

@@ -140,6 +140,12 @@ GridTrackPlacementShorthandStyleValue const& StyleValue::as_grid_track_placement
     return static_cast<GridTrackPlacementShorthandStyleValue const&>(*this);
 }
 
+GridTemplateAreaStyleValue const& StyleValue::as_grid_template_area() const
+{
+    VERIFY(is_grid_template_area());
+    return static_cast<GridTemplateAreaStyleValue const&>(*this);
+}
+
 GridTrackPlacementStyleValue const& StyleValue::as_grid_track_placement() const
 {
     VERIFY(is_grid_track_placement());
@@ -1434,6 +1440,29 @@ bool GridTrackPlacementStyleValue::equals(StyleValue const& other) const
     return m_grid_track_placement == typed_other.grid_track_placement();
 }
 
+ErrorOr<String> GridTemplateAreaStyleValue::to_string() const
+{
+    StringBuilder builder;
+    for (size_t y = 0; y < m_grid_template_area.size(); ++y) {
+        for (size_t x = 0; x < m_grid_template_area[y].size(); ++x) {
+            builder.appendff("{}", m_grid_template_area[y][x]);
+            if (x < m_grid_template_area[y].size() - 1)
+                builder.append(" "sv);
+        }
+        if (y < m_grid_template_area.size() - 1)
+            builder.append(", "sv);
+    }
+    return builder.to_string();
+}
+
+bool GridTemplateAreaStyleValue::equals(StyleValue const& other) const
+{
+    if (type() != other.type())
+        return false;
+    auto const& typed_other = other.as_grid_template_area();
+    return m_grid_template_area == typed_other.grid_template_area();
+}
+
 ErrorOr<String> GridTrackSizeStyleValue::to_string() const
 {
     return m_grid_track_size_list.to_string();
@@ -2528,6 +2557,11 @@ NonnullRefPtr<ColorStyleValue> ColorStyleValue::create(Color color)
     return adopt_ref(*new ColorStyleValue(color));
 }
 
+NonnullRefPtr<GridTemplateAreaStyleValue> GridTemplateAreaStyleValue::create(Vector<Vector<String>> grid_template_area)
+{
+    return adopt_ref(*new GridTemplateAreaStyleValue(grid_template_area));
+}
+
 NonnullRefPtr<GridTrackPlacementStyleValue> GridTrackPlacementStyleValue::create(CSS::GridTrackPlacement grid_track_placement)
 {
     return adopt_ref(*new GridTrackPlacementStyleValue(grid_track_placement));

Userland/Libraries/LibWeb/CSS/StyleValue.h

@@ -228,6 +228,7 @@ public:
         FlexFlow,
         Font,
         Frequency,
+        GridTemplateArea,
         GridTrackPlacement,
         GridTrackPlacementShorthand,
         GridTrackSizeList,
@@ -275,6 +276,7 @@ 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_template_area() const { return type() == Type::GridTemplateArea; }
     bool is_grid_track_placement() const { return type() == Type::GridTrackPlacement; }
     bool is_grid_track_placement_shorthand() const { return type() == Type::GridTrackPlacementShorthand; }
     bool is_grid_track_size_list() const { return type() == Type::GridTrackSizeList; }
@@ -320,6 +322,7 @@ public:
     FlexStyleValue const& as_flex() const;
     FontStyleValue const& as_font() const;
     FrequencyStyleValue const& as_frequency() const;
+    GridTemplateAreaStyleValue const& as_grid_template_area() const;
     GridTrackPlacementShorthandStyleValue const& as_grid_track_placement_shorthand() const;
     GridTrackPlacementStyleValue const& as_grid_track_placement() const;
     GridTrackSizeStyleValue const& as_grid_track_size_list() const;
@@ -363,6 +366,7 @@ 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()); }
+    GridTemplateAreaStyleValue& as_grid_template_area() { return const_cast<GridTemplateAreaStyleValue&>(const_cast<StyleValue const&>(*this).as_grid_template_area()); }
     GridTrackPlacementShorthandStyleValue& as_grid_track_placement_shorthand() { return const_cast<GridTrackPlacementShorthandStyleValue&>(const_cast<StyleValue const&>(*this).as_grid_track_placement_shorthand()); }
     GridTrackPlacementStyleValue& as_grid_track_placement() { return const_cast<GridTrackPlacementStyleValue&>(const_cast<StyleValue const&>(*this).as_grid_track_placement()); }
     GridTrackSizeStyleValue& as_grid_track_size_list() { return const_cast<GridTrackSizeStyleValue&>(const_cast<StyleValue const&>(*this).as_grid_track_size_list()); }
@@ -1052,6 +1056,25 @@ private:
     Frequency m_frequency;
 };
 
+class GridTemplateAreaStyleValue final : public StyleValue {
+public:
+    static NonnullRefPtr<GridTemplateAreaStyleValue> create(Vector<Vector<String>> grid_template_area);
+    virtual ~GridTemplateAreaStyleValue() override = default;
+
+    Vector<Vector<String>> const& grid_template_area() const { return m_grid_template_area; }
+    virtual ErrorOr<String> to_string() const override;
+    virtual bool equals(StyleValue const& other) const override;
+
+private:
+    explicit GridTemplateAreaStyleValue(Vector<Vector<String>> grid_template_area)
+        : StyleValue(Type::GridTemplateArea)
+        , m_grid_template_area(grid_template_area)
+    {
+    }
+
+    Vector<Vector<String>> m_grid_template_area;
+};
+
 class GridTrackPlacementStyleValue final : public StyleValue {
 public:
     static NonnullRefPtr<GridTrackPlacementStyleValue> create(CSS::GridTrackPlacement grid_track_placement);

Userland/Libraries/LibWeb/Forward.h

@@ -65,6 +65,7 @@ class FrequencyStyleValue;
 class GridMinMax;
 class GridRepeat;
 class GridSize;
+class GridTemplateAreaStyleValue;
 class GridTrackPlacement;
 class GridTrackPlacementShorthandStyleValue;
 class GridTrackPlacementStyleValue;

Userland/Libraries/LibWeb/Layout/Node.cpp

@@ -592,6 +592,7 @@ void NodeWithStyle::apply_style(const CSS::StyleProperties& computed_style)
     computed_values.set_grid_column_start(computed_style.grid_column_start());
     computed_values.set_grid_row_end(computed_style.grid_row_end());
     computed_values.set_grid_row_start(computed_style.grid_row_start());
+    computed_values.set_grid_template_areas(computed_style.grid_template_areas());
 
     if (auto fill = computed_style.property(CSS::PropertyID::Fill); fill->has_color())
         computed_values.set_fill(fill->to_color(*this));