LibWeb: Split FilterValueListStyleValue out of StyleValue.{h,cpp}

8 files changed, 232 insertions, 191 deletions

diff --git a/Userland/Libraries/LibWeb/CMakeLists.txt b/Userland/Libraries/LibWeb/CMakeLists.txt
index 1d35524eb9..450c8b59ac 100644
--- a/Userland/Libraries/LibWeb/CMakeLists.txt
+++ b/Userland/Libraries/LibWeb/CMakeLists.txt
@@ -73,6 +73,7 @@ set(SOURCES
     CSS/StyleValues/BorderStyleValue.cpp
     CSS/StyleValues/ColorStyleValue.cpp
     CSS/StyleValues/ContentStyleValue.cpp
+    CSS/StyleValues/FilterValueListStyleValue.cpp
     CSS/Supports.cpp
     CSS/SyntaxHighlighter/SyntaxHighlighter.cpp
     CSS/Time.cpp
diff --git a/Userland/Libraries/LibWeb/CSS/BackdropFilter.h b/Userland/Libraries/LibWeb/CSS/BackdropFilter.h
index bdceb36ee1..5dd1e5be8d 100644
--- a/Userland/Libraries/LibWeb/CSS/BackdropFilter.h
+++ b/Userland/Libraries/LibWeb/CSS/BackdropFilter.h
@@ -8,6 +8,7 @@
 
 #include <AK/Variant.h>
 #include <LibWeb/CSS/StyleValue.h>
+#include <LibWeb/CSS/StyleValues/FilterValueListStyleValue.h>
 
 namespace Web::CSS {
 
diff --git a/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp b/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
index 84b48ed75b..1a2883164a 100644
--- a/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
+++ b/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
@@ -38,6 +38,7 @@
 #include <LibWeb/CSS/StyleValues/BorderStyleValue.h>
 #include <LibWeb/CSS/StyleValues/ColorStyleValue.h>
 #include <LibWeb/CSS/StyleValues/ContentStyleValue.h>
+#include <LibWeb/CSS/StyleValues/FilterValueListStyleValue.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/Dump.h>
 #include <LibWeb/Infra/Strings.h>
diff --git a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
index c04837ee15..61d8a4b754 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
@@ -30,6 +30,7 @@
 #include <LibWeb/CSS/StyleValues/BorderRadiusStyleValue.h>
 #include <LibWeb/CSS/StyleValues/BorderStyleValue.h>
 #include <LibWeb/CSS/StyleValues/ColorStyleValue.h>
+#include <LibWeb/CSS/StyleValues/FilterValueListStyleValue.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/Element.h>
 #include <LibWeb/FontCache.h>
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValue.cpp b/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
index 0e9bca9cb5..f13b0db3a2 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
@@ -20,6 +20,7 @@
 #include <LibWeb/CSS/StyleValues/BorderStyleValue.h>
 #include <LibWeb/CSS/StyleValues/ColorStyleValue.h>
 #include <LibWeb/CSS/StyleValues/ContentStyleValue.h>
+#include <LibWeb/CSS/StyleValues/FilterValueListStyleValue.h>
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/HTML/BrowsingContext.h>
 #include <LibWeb/Loader/LoadRequest.h>
@@ -1022,117 +1023,6 @@ CalculatedStyleValue::CalculationResult CalculatedStyleValue::CalcNumberSumPartW
     return value->resolve(layout_node, percentage_basis);
 }
 
-float Filter::Blur::resolved_radius(Layout::Node const& node) const
-{
-    // Default value when omitted is 0px.
-    auto sigma = 0;
-    if (radius.has_value())
-        sigma = radius->resolved(node).to_px(node).value();
-    // Note: The radius/sigma of the blur needs to be doubled for LibGfx's blur functions.
-    return sigma * 2;
-}
-
-Filter::DropShadow::Resolved Filter::DropShadow::resolved(Layout::Node const& node) const
-{
-    // The default value for omitted values is missing length values set to 0
-    // and the missing used color is taken from the color property.
-    return Resolved {
-        offset_x.resolved(node).to_px(node).value(),
-        offset_y.resolved(node).to_px(node).value(),
-        radius.has_value() ? radius->resolved(node).to_px(node).value() : 0.0f,
-        color.has_value() ? *color : node.computed_values().color()
-    };
-}
-
-float Filter::HueRotate::angle_degrees() const
-{
-    // Default value when omitted is 0deg.
-    if (!angle.has_value())
-        return 0.0f;
-    return angle->visit([&](Angle const& angle) { return angle.to_degrees(); }, [&](auto) { return 0.0f; });
-}
-
-float Filter::Color::resolved_amount() const
-{
-    if (amount.has_value()) {
-        if (amount->is_percentage())
-            return amount->percentage().as_fraction();
-        return amount->number().value();
-    }
-    // All color filters (brightness, sepia, etc) have a default amount of 1.
-    return 1.0f;
-}
-
-ErrorOr<String> FilterValueListStyleValue::to_string() const
-{
-    StringBuilder builder {};
-    bool first = true;
-    for (auto& filter_function : filter_value_list()) {
-        if (!first)
-            TRY(builder.try_append(' '));
-        TRY(filter_function.visit(
-            [&](Filter::Blur const& blur) -> ErrorOr<void> {
-                TRY(builder.try_append("blur("sv));
-                if (blur.radius.has_value())
-                    TRY(builder.try_append(TRY(blur.radius->to_string())));
-                return {};
-            },
-            [&](Filter::DropShadow const& drop_shadow) -> ErrorOr<void> {
-                TRY(builder.try_appendff("drop-shadow({} {}"sv,
-                    drop_shadow.offset_x, drop_shadow.offset_y));
-                if (drop_shadow.radius.has_value())
-                    TRY(builder.try_appendff(" {}", TRY(drop_shadow.radius->to_string())));
-                if (drop_shadow.color.has_value()) {
-                    TRY(builder.try_append(' '));
-                    TRY(serialize_a_srgb_value(builder, *drop_shadow.color));
-                }
-                return {};
-            },
-            [&](Filter::HueRotate const& hue_rotate) -> ErrorOr<void> {
-                TRY(builder.try_append("hue-rotate("sv));
-                if (hue_rotate.angle.has_value()) {
-                    TRY(hue_rotate.angle->visit(
-                        [&](Angle const& angle) -> ErrorOr<void> {
-                            return builder.try_append(TRY(angle.to_string()));
-                        },
-                        [&](auto&) -> ErrorOr<void> {
-                            return builder.try_append('0');
-                        }));
-                }
-                return {};
-            },
-            [&](Filter::Color const& color) -> ErrorOr<void> {
-                TRY(builder.try_appendff("{}(",
-                    [&] {
-                        switch (color.operation) {
-                        case Filter::Color::Operation::Brightness:
-                            return "brightness"sv;
-                        case Filter::Color::Operation::Contrast:
-                            return "contrast"sv;
-                        case Filter::Color::Operation::Grayscale:
-                            return "grayscale"sv;
-                        case Filter::Color::Operation::Invert:
-                            return "invert"sv;
-                        case Filter::Color::Operation::Opacity:
-                            return "opacity"sv;
-                        case Filter::Color::Operation::Saturate:
-                            return "saturate"sv;
-                        case Filter::Color::Operation::Sepia:
-                            return "sepia"sv;
-                        default:
-                            VERIFY_NOT_REACHED();
-                        }
-                    }()));
-                if (color.amount.has_value())
-                    TRY(builder.try_append(TRY(color.amount->to_string())));
-                return {};
-            }));
-        TRY(builder.try_append(')'));
-        first = false;
-    }
-    return builder.to_string();
-}
-
 ErrorOr<String> FlexStyleValue::to_string() const
 {
     return String::formatted("{} {} {}", TRY(m_properties.grow->to_string()), TRY(m_properties.shrink->to_string()), TRY(m_properties.basis->to_string()));
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValue.h b/Userland/Libraries/LibWeb/CSS/StyleValue.h
index 0719cc91a5..1a40817745 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValue.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleValue.h
@@ -145,58 +145,6 @@ struct EdgeRect {
     bool operator==(EdgeRect const&) const = default;
 };
 
-namespace Filter {
-
-struct Blur {
-    Optional<Length> radius {};
-    float resolved_radius(Layout::Node const&) const;
-    bool operator==(Blur const&) const = default;
-};
-
-struct DropShadow {
-    Length offset_x;
-    Length offset_y;
-    Optional<Length> radius {};
-    Optional<Color> color {};
-    struct Resolved {
-        float offset_x;
-        float offset_y;
-        float radius;
-        Color color;
-    };
-    Resolved resolved(Layout::Node const&) const;
-    bool operator==(DropShadow const&) const = default;
-};
-
-struct HueRotate {
-    struct Zero {
-        bool operator==(Zero const&) const = default;
-    };
-    using AngleOrZero = Variant<Angle, Zero>;
-    Optional<AngleOrZero> angle {};
-    float angle_degrees() const;
-    bool operator==(HueRotate const&) const = default;
-};
-
-struct Color {
-    enum class Operation {
-        Brightness,
-        Contrast,
-        Grayscale,
-        Invert,
-        Opacity,
-        Saturate,
-        Sepia
-    } operation;
-    Optional<NumberPercentage> amount {};
-    float resolved_amount() const;
-    bool operator==(Color const&) const = default;
-};
-
-};
-
-using FilterFunction = Variant<Filter::Blur, Filter::DropShadow, Filter::HueRotate, Filter::Color>;
-
 // FIXME: Find a better place for this helper.
 inline Gfx::Painter::ScalingMode to_gfx_scaling_mode(CSS::ImageRendering css_value)
 {
@@ -713,34 +661,6 @@ private:
     NonnullOwnPtr<CalcSum> m_expression;
 };
 
-class FilterValueListStyleValue final : public StyleValueWithDefaultOperators<FilterValueListStyleValue> {
-public:
-    static ValueComparingNonnullRefPtr<FilterValueListStyleValue> create(
-        Vector<FilterFunction> filter_value_list)
-    {
-        VERIFY(filter_value_list.size() >= 1);
-        return adopt_ref(*new FilterValueListStyleValue(move(filter_value_list)));
-    }
-
-    Vector<FilterFunction> const& filter_value_list() const { return m_filter_value_list; }
-
-    virtual ErrorOr<String> to_string() const override;
-
-    virtual ~FilterValueListStyleValue() override = default;
-
-    bool properties_equal(FilterValueListStyleValue const& other) const { return m_filter_value_list == other.m_filter_value_list; };
-
-private:
-    FilterValueListStyleValue(Vector<FilterFunction> filter_value_list)
-        : StyleValueWithDefaultOperators(Type::FilterValueList)
-        , m_filter_value_list(move(filter_value_list))
-    {
-    }
-
-    // FIXME: No support for SVG filters yet
-    Vector<FilterFunction> m_filter_value_list;
-};
-
 class FlexStyleValue final : public StyleValueWithDefaultOperators<FlexStyleValue> {
 public:
     static ValueComparingNonnullRefPtr<FlexStyleValue> create(
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValues/FilterValueListStyleValue.cpp b/Userland/Libraries/LibWeb/CSS/StyleValues/FilterValueListStyleValue.cpp
new file mode 100644
index 0000000000..a106fd1001
--- /dev/null
+++ b/Userland/Libraries/LibWeb/CSS/StyleValues/FilterValueListStyleValue.cpp
@@ -0,0 +1,127 @@
+/*
+ * 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 "FilterValueListStyleValue.h"
+#include <LibWeb/CSS/Serialize.h>
+#include <LibWeb/Layout/Node.h>
+
+namespace Web::CSS {
+
+float Filter::Blur::resolved_radius(Layout::Node const& node) const
+{
+    // Default value when omitted is 0px.
+    auto sigma = 0;
+    if (radius.has_value())
+        sigma = radius->resolved(node).to_px(node).value();
+    // Note: The radius/sigma of the blur needs to be doubled for LibGfx's blur functions.
+    return sigma * 2;
+}
+
+Filter::DropShadow::Resolved Filter::DropShadow::resolved(Layout::Node const& node) const
+{
+    // The default value for omitted values is missing length values set to 0
+    // and the missing used color is taken from the color property.
+    return Resolved {
+        offset_x.resolved(node).to_px(node).value(),
+        offset_y.resolved(node).to_px(node).value(),
+        radius.has_value() ? radius->resolved(node).to_px(node).value() : 0.0f,
+        color.has_value() ? *color : node.computed_values().color()
+    };
+}
+
+float Filter::HueRotate::angle_degrees() const
+{
+    // Default value when omitted is 0deg.
+    if (!angle.has_value())
+        return 0.0f;
+    return angle->visit([&](Angle const& a) { return a.to_degrees(); }, [&](auto) { return 0.0f; });
+}
+
+float Filter::Color::resolved_amount() const
+{
+    if (amount.has_value()) {
+        if (amount->is_percentage())
+            return amount->percentage().as_fraction();
+        return amount->number().value();
+    }
+    // All color filters (brightness, sepia, etc) have a default amount of 1.
+    return 1.0f;
+}
+
+ErrorOr<String> FilterValueListStyleValue::to_string() const
+{
+    StringBuilder builder {};
+    bool first = true;
+    for (auto& filter_function : filter_value_list()) {
+        if (!first)
+            TRY(builder.try_append(' '));
+        TRY(filter_function.visit(
+            [&](Filter::Blur const& blur) -> ErrorOr<void> {
+                TRY(builder.try_append("blur("sv));
+                if (blur.radius.has_value())
+                    TRY(builder.try_append(TRY(blur.radius->to_string())));
+                return {};
+            },
+            [&](Filter::DropShadow const& drop_shadow) -> ErrorOr<void> {
+                TRY(builder.try_appendff("drop-shadow({} {}"sv,
+                    drop_shadow.offset_x, drop_shadow.offset_y));
+                if (drop_shadow.radius.has_value())
+                    TRY(builder.try_appendff(" {}", TRY(drop_shadow.radius->to_string())));
+                if (drop_shadow.color.has_value()) {
+                    TRY(builder.try_append(' '));
+                    TRY(serialize_a_srgb_value(builder, *drop_shadow.color));
+                }
+                return {};
+            },
+            [&](Filter::HueRotate const& hue_rotate) -> ErrorOr<void> {
+                TRY(builder.try_append("hue-rotate("sv));
+                if (hue_rotate.angle.has_value()) {
+                    TRY(hue_rotate.angle->visit(
+                        [&](Angle const& angle) -> ErrorOr<void> {
+                            return builder.try_append(TRY(angle.to_string()));
+                        },
+                        [&](auto&) -> ErrorOr<void> {
+                            return builder.try_append('0');
+                        }));
+                }
+                return {};
+            },
+            [&](Filter::Color const& color) -> ErrorOr<void> {
+                TRY(builder.try_appendff("{}(",
+                    [&] {
+                        switch (color.operation) {
+                        case Filter::Color::Operation::Brightness:
+                            return "brightness"sv;
+                        case Filter::Color::Operation::Contrast:
+                            return "contrast"sv;
+                        case Filter::Color::Operation::Grayscale:
+                            return "grayscale"sv;
+                        case Filter::Color::Operation::Invert:
+                            return "invert"sv;
+                        case Filter::Color::Operation::Opacity:
+                            return "opacity"sv;
+                        case Filter::Color::Operation::Saturate:
+                            return "saturate"sv;
+                        case Filter::Color::Operation::Sepia:
+                            return "sepia"sv;
+                        default:
+                            VERIFY_NOT_REACHED();
+                        }
+                    }()));
+                if (color.amount.has_value())
+                    TRY(builder.try_append(TRY(color.amount->to_string())));
+                return {};
+            }));
+        TRY(builder.try_append(')'));
+        first = false;
+    }
+    return builder.to_string();
+}
+
+}
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValues/FilterValueListStyleValue.h b/Userland/Libraries/LibWeb/CSS/StyleValues/FilterValueListStyleValue.h
new file mode 100644
index 0000000000..2275d04dcc
--- /dev/null
+++ b/Userland/Libraries/LibWeb/CSS/StyleValues/FilterValueListStyleValue.h
@@ -0,0 +1,100 @@
+/*
+ * 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/Angle.h>
+#include <LibWeb/CSS/Length.h>
+#include <LibWeb/CSS/Number.h>
+#include <LibWeb/CSS/Percentage.h>
+#include <LibWeb/CSS/StyleValue.h>
+
+namespace Web::CSS {
+
+namespace Filter {
+
+struct Blur {
+    Optional<Length> radius {};
+    float resolved_radius(Layout::Node const&) const;
+    bool operator==(Blur const&) const = default;
+};
+
+struct DropShadow {
+    Length offset_x;
+    Length offset_y;
+    Optional<Length> radius {};
+    Optional<Color> color {};
+    struct Resolved {
+        float offset_x;
+        float offset_y;
+        float radius;
+        Color color;
+    };
+    Resolved resolved(Layout::Node const&) const;
+    bool operator==(DropShadow const&) const = default;
+};
+
+struct HueRotate {
+    struct Zero {
+        bool operator==(Zero const&) const = default;
+    };
+    using AngleOrZero = Variant<Angle, Zero>;
+    Optional<AngleOrZero> angle {};
+    float angle_degrees() const;
+    bool operator==(HueRotate const&) const = default;
+};
+
+struct Color {
+    enum class Operation {
+        Brightness,
+        Contrast,
+        Grayscale,
+        Invert,
+        Opacity,
+        Saturate,
+        Sepia
+    } operation;
+    Optional<NumberPercentage> amount {};
+    float resolved_amount() const;
+    bool operator==(Color const&) const = default;
+};
+
+};
+
+using FilterFunction = Variant<Filter::Blur, Filter::DropShadow, Filter::HueRotate, Filter::Color>;
+
+class FilterValueListStyleValue final : public StyleValueWithDefaultOperators<FilterValueListStyleValue> {
+public:
+    static ValueComparingNonnullRefPtr<FilterValueListStyleValue> create(
+        Vector<FilterFunction> filter_value_list)
+    {
+        VERIFY(filter_value_list.size() >= 1);
+        return adopt_ref(*new FilterValueListStyleValue(move(filter_value_list)));
+    }
+
+    Vector<FilterFunction> const& filter_value_list() const { return m_filter_value_list; }
+
+    virtual ErrorOr<String> to_string() const override;
+
+    virtual ~FilterValueListStyleValue() override = default;
+
+    bool properties_equal(FilterValueListStyleValue const& other) const { return m_filter_value_list == other.m_filter_value_list; };
+
+private:
+    FilterValueListStyleValue(Vector<FilterFunction> filter_value_list)
+        : StyleValueWithDefaultOperators(Type::FilterValueList)
+        , m_filter_value_list(move(filter_value_list))
+    {
+    }
+
+    // FIXME: No support for SVG filters yet
+    Vector<FilterFunction> m_filter_value_list;
+};
+
+}