LibWeb: Replace FlexStyleValue with ShorthandStyleValue

We still need the custom parsing and to_string() logic, but nothing
else. :^)

Meta/gn/secondary/Userland/Libraries/LibWeb/CSS/StyleValues/BUILD.gn

@@ -18,7 +18,6 @@ source_set("StyleValues") {
     "EdgeStyleValue.cpp",
     "FilterValueListStyleValue.cpp",
     "FlexFlowStyleValue.cpp",
-    "FlexStyleValue.cpp",
     "FontStyleValue.cpp",
     "GridAreaShorthandStyleValue.cpp",
     "GridAutoFlowStyleValue.cpp",

Userland/Libraries/LibWeb/CMakeLists.txt

@@ -95,7 +95,6 @@ set(SOURCES
     CSS/StyleValues/EdgeStyleValue.cpp
     CSS/StyleValues/FilterValueListStyleValue.cpp
     CSS/StyleValues/FlexFlowStyleValue.cpp
-    CSS/StyleValues/FlexStyleValue.cpp
     CSS/StyleValues/FontStyleValue.cpp
     CSS/StyleValues/GridAreaShorthandStyleValue.cpp
     CSS/StyleValues/GridAutoFlowStyleValue.cpp

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

@@ -49,7 +49,6 @@
 #include <LibWeb/CSS/StyleValues/EdgeStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FilterValueListStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FlexFlowStyleValue.h>
-#include <LibWeb/CSS/StyleValues/FlexStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FontStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FrequencyStyleValue.h>
 #include <LibWeb/CSS/StyleValues/GridAreaShorthandStyleValue.h>
@@ -3849,6 +3848,12 @@ RefPtr<StyleValue> Parser::parse_flex_value(Vector<ComponentValue> const& compon
 {
     auto tokens = TokenStream { component_values };
 
+    auto make_flex_shorthand = [&](NonnullRefPtr<StyleValue> flex_grow, NonnullRefPtr<StyleValue> flex_shrink, NonnullRefPtr<StyleValue> flex_basis) {
+        return ShorthandStyleValue::create(PropertyID::Flex,
+            { PropertyID::FlexGrow, PropertyID::FlexShrink, PropertyID::FlexBasis },
+            { move(flex_grow), move(flex_shrink), move(flex_basis) });
+    };
+
     if (component_values.size() == 1) {
         // One-value syntax: <flex-grow> | <flex-basis> | none
         auto properties = Array { PropertyID::FlexGrow, PropertyID::FlexBasis, PropertyID::Flex };
@@ -3863,16 +3868,16 @@ RefPtr<StyleValue> Parser::parse_flex_value(Vector<ComponentValue> const& compon
             // https://github.com/w3c/csswg-drafts/issues/5742
             auto flex_basis = PercentageStyleValue::create(Percentage(0));
             auto one = NumberStyleValue::create(1);
-            return FlexStyleValue::create(*value, one, flex_basis);
+            return make_flex_shorthand(*value, one, flex_basis);
         }
         case PropertyID::FlexBasis: {
             auto one = NumberStyleValue::create(1);
-            return FlexStyleValue::create(one, one, *value);
+            return make_flex_shorthand(one, one, *value);
         }
         case PropertyID::Flex: {
             if (value->is_identifier() && value->to_identifier() == ValueID::None) {
                 auto zero = NumberStyleValue::create(0);
-                return FlexStyleValue::create(zero, zero, IdentifierStyleValue::create(ValueID::Auto));
+                return make_flex_shorthand(zero, zero, IdentifierStyleValue::create(ValueID::Auto));
             }
             break;
         }
@@ -3929,7 +3934,7 @@ RefPtr<StyleValue> Parser::parse_flex_value(Vector<ComponentValue> const& compon
         flex_basis = PercentageStyleValue::create(Percentage(0));
     }
 
-    return FlexStyleValue::create(flex_grow.release_nonnull(), flex_shrink.release_nonnull(), flex_basis.release_nonnull());
+    return make_flex_shorthand(flex_grow.release_nonnull(), flex_shrink.release_nonnull(), flex_basis.release_nonnull());
 }
 
 RefPtr<StyleValue> Parser::parse_flex_flow_value(Vector<ComponentValue> const& component_values)
@@ -6003,7 +6008,7 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue>> Parser::parse_css_value(Property
             longhand_values.unchecked_append(StyleValueList::create(move(it.value), StyleValueList::Separator::Space));
     }
 
-    return { ShorthandStyleValue::create(move(longhand_properties), move(longhand_values)) };
+    return { ShorthandStyleValue::create(property_id, move(longhand_properties), move(longhand_values)) };
 }
 
 RefPtr<StyleValue> Parser::parse_css_value_for_property(PropertyID property_id, TokenStream<ComponentValue>& tokens)

Userland/Libraries/LibWeb/CSS/StyleComputer.cpp

@@ -40,7 +40,6 @@
 #include <LibWeb/CSS/StyleValues/EasingStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FilterValueListStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FlexFlowStyleValue.h>
-#include <LibWeb/CSS/StyleValues/FlexStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FontStyleValue.h>
 #include <LibWeb/CSS/StyleValues/GridAreaShorthandStyleValue.h>
 #include <LibWeb/CSS/StyleValues/GridTrackPlacementShorthandStyleValue.h>
@@ -800,14 +799,6 @@ static void set_property_expanding_shorthands(StyleProperties& style, CSS::Prope
     }
 
     if (property_id == CSS::PropertyID::Flex) {
-        if (value.is_flex()) {
-            auto const& flex = value.as_flex();
-            set_longhand_property(CSS::PropertyID::FlexGrow, flex.grow());
-            set_longhand_property(CSS::PropertyID::FlexShrink, flex.shrink());
-            set_longhand_property(CSS::PropertyID::FlexBasis, flex.basis());
-            return;
-        }
-
         set_longhand_property(CSS::PropertyID::FlexGrow, value);
         set_longhand_property(CSS::PropertyID::FlexShrink, value);
         set_longhand_property(CSS::PropertyID::FlexBasis, value);

Userland/Libraries/LibWeb/CSS/StyleValue.cpp

@@ -28,7 +28,6 @@
 #include <LibWeb/CSS/StyleValues/EdgeStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FilterValueListStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FlexFlowStyleValue.h>
-#include <LibWeb/CSS/StyleValues/FlexStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FontStyleValue.h>
 #include <LibWeb/CSS/StyleValues/FrequencyStyleValue.h>
 #include <LibWeb/CSS/StyleValues/GridAreaShorthandStyleValue.h>

Userland/Libraries/LibWeb/CSS/StyleValue.h

@@ -99,7 +99,6 @@ using StyleValueVector = Vector<ValueComparingNonnullRefPtr<StyleValue const>>;
     __ENUMERATE_STYLE_VALUE_TYPE(Easing, easing)                                              \
     __ENUMERATE_STYLE_VALUE_TYPE(Edge, edge)                                                  \
     __ENUMERATE_STYLE_VALUE_TYPE(FilterValueList, filter_value_list)                          \
-    __ENUMERATE_STYLE_VALUE_TYPE(Flex, flex)                                                  \
     __ENUMERATE_STYLE_VALUE_TYPE(FlexFlow, flex_flow)                                         \
     __ENUMERATE_STYLE_VALUE_TYPE(Font, font)                                                  \
     __ENUMERATE_STYLE_VALUE_TYPE(Frequency, frequency)                                        \

Userland/Libraries/LibWeb/CSS/StyleValues/FlexStyleValue.cpp

@@ -1,19 +0,0 @@
-/*
- * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
- * Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
- * Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
- * Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include "FlexStyleValue.h"
-
-namespace Web::CSS {
-
-String FlexStyleValue::to_string() const
-{
-    return MUST(String::formatted("{} {} {}", m_properties.grow->to_string(), m_properties.shrink->to_string(), m_properties.basis->to_string()));
-}
-
-}

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

@@ -1,53 +0,0 @@
-/*
- * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
- * Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
- * Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
- * Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#pragma once
-
-#include <LibWeb/CSS/StyleValue.h>
-
-namespace Web::CSS {
-
-class FlexStyleValue final : public StyleValueWithDefaultOperators<FlexStyleValue> {
-public:
-    static ValueComparingNonnullRefPtr<FlexStyleValue> create(
-        ValueComparingNonnullRefPtr<StyleValue> grow,
-        ValueComparingNonnullRefPtr<StyleValue> shrink,
-        ValueComparingNonnullRefPtr<StyleValue> basis)
-    {
-        return adopt_ref(*new (nothrow) FlexStyleValue(move(grow), move(shrink), move(basis)));
-    }
-    virtual ~FlexStyleValue() override = default;
-
-    ValueComparingNonnullRefPtr<StyleValue> grow() const { return m_properties.grow; }
-    ValueComparingNonnullRefPtr<StyleValue> shrink() const { return m_properties.shrink; }
-    ValueComparingNonnullRefPtr<StyleValue> basis() const { return m_properties.basis; }
-
-    virtual String to_string() const override;
-
-    bool properties_equal(FlexStyleValue const& other) const { return m_properties == other.m_properties; }
-
-private:
-    FlexStyleValue(
-        ValueComparingNonnullRefPtr<StyleValue> grow,
-        ValueComparingNonnullRefPtr<StyleValue> shrink,
-        ValueComparingNonnullRefPtr<StyleValue> basis)
-        : StyleValueWithDefaultOperators(Type::Flex)
-        , m_properties { .grow = move(grow), .shrink = move(shrink), .basis = move(basis) }
-    {
-    }
-
-    struct Properties {
-        ValueComparingNonnullRefPtr<StyleValue> grow;
-        ValueComparingNonnullRefPtr<StyleValue> shrink;
-        ValueComparingNonnullRefPtr<StyleValue> basis;
-        bool operator==(Properties const&) const = default;
-    } m_properties;
-};
-
-}

Userland/Libraries/LibWeb/CSS/StyleValues/ShorthandStyleValue.cpp

@@ -5,13 +5,14 @@
  */
 
 #include "ShorthandStyleValue.h"
+#include <LibWeb/CSS/PropertyID.h>
 #include <LibWeb/CSS/StyleValues/StyleValueList.h>
 
 namespace Web::CSS {
 
-ShorthandStyleValue::ShorthandStyleValue(Vector<PropertyID> sub_properties, Vector<ValueComparingNonnullRefPtr<StyleValue const>> values)
+ShorthandStyleValue::ShorthandStyleValue(PropertyID shorthand, Vector<PropertyID> sub_properties, Vector<ValueComparingNonnullRefPtr<StyleValue const>> values)
     : StyleValueWithDefaultOperators(Type::Shorthand)
-    , m_properties { move(sub_properties), move(values) }
+    , m_properties { shorthand, move(sub_properties), move(values) }
 {
     if (m_properties.sub_properties.size() != m_properties.values.size()) {
         dbgln("ShorthandStyleValue: sub_properties and values must be the same size! {} != {}", m_properties.sub_properties.size(), m_properties.values.size());
@@ -21,18 +22,33 @@ ShorthandStyleValue::ShorthandStyleValue(Vector<PropertyID> sub_properties, Vect
 
 ShorthandStyleValue::~ShorthandStyleValue() = default;
 
+ValueComparingRefPtr<StyleValue const> ShorthandStyleValue::longhand(PropertyID longhand) const
+{
+    for (auto i = 0u; i < m_properties.sub_properties.size(); ++i) {
+        if (m_properties.sub_properties[i] == longhand)
+            return m_properties.values[i];
+    }
+    return nullptr;
+}
+
 String ShorthandStyleValue::to_string() const
 {
-    StringBuilder builder;
-    auto first = true;
-    for (auto& value : m_properties.values) {
-        if (first)
-            first = false;
-        else
-            builder.append(' ');
-        builder.append(value->to_string());
+    // Special-cases first
+    switch (m_properties.shorthand_property) {
+    case PropertyID::Flex:
+        return MUST(String::formatted("{} {} {}", longhand(PropertyID::FlexGrow)->to_string(), longhand(PropertyID::FlexShrink)->to_string(), longhand(PropertyID::FlexBasis)->to_string()));
+    default:
+        StringBuilder builder;
+        auto first = true;
+        for (auto& value : m_properties.values) {
+            if (first)
+                first = false;
+            else
+                builder.append(' ');
+            builder.append(value->to_string());
+        }
+        return MUST(builder.to_string());
     }
-    return MUST(builder.to_string());
 }
 
 }

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

@@ -12,23 +12,26 @@ namespace Web::CSS {
 
 class ShorthandStyleValue final : public StyleValueWithDefaultOperators<ShorthandStyleValue> {
 public:
-    static ValueComparingNonnullRefPtr<ShorthandStyleValue> create(Vector<PropertyID> sub_properties, Vector<ValueComparingNonnullRefPtr<StyleValue const>> values)
+    static ValueComparingNonnullRefPtr<ShorthandStyleValue> create(PropertyID shorthand, Vector<PropertyID> sub_properties, Vector<ValueComparingNonnullRefPtr<StyleValue const>> values)
     {
-        return adopt_ref(*new ShorthandStyleValue(move(sub_properties), move(values)));
+        return adopt_ref(*new ShorthandStyleValue(shorthand, move(sub_properties), move(values)));
     }
     virtual ~ShorthandStyleValue() override;
 
     Vector<PropertyID> const& sub_properties() const { return m_properties.sub_properties; }
     Vector<ValueComparingNonnullRefPtr<StyleValue const>> const& values() const { return m_properties.values; }
 
+    ValueComparingRefPtr<StyleValue const> longhand(PropertyID) const;
+
     virtual String to_string() const override;
 
     bool properties_equal(ShorthandStyleValue const& other) const { return m_properties == other.m_properties; }
 
 private:
-    ShorthandStyleValue(Vector<PropertyID> sub_properties, Vector<ValueComparingNonnullRefPtr<StyleValue const>> values);
+    ShorthandStyleValue(PropertyID shorthand, Vector<PropertyID> sub_properties, Vector<ValueComparingNonnullRefPtr<StyleValue const>> values);
 
     struct Properties {
+        PropertyID shorthand_property;
         Vector<PropertyID> sub_properties;
         Vector<ValueComparingNonnullRefPtr<StyleValue const>> values;
         bool operator==(Properties const&) const = default;

Userland/Libraries/LibWeb/Forward.h

@@ -105,7 +105,6 @@ class ElementInlineCSSStyleDeclaration;
 class ExplicitGridTrack;
 class FilterValueListStyleValue;
 class FlexFlowStyleValue;
-class FlexStyleValue;
 class FontFace;
 class FontStyleValue;
 class Frequency;