From ad5f7c56c112e4e0901a4452f6655ae2135170be Mon Sep 17 00:00:00 2001
From: Sam Atkins <sam@ladybird.org>
Date: Wed, 27 Aug 2025 11:43:44 +0100
Subject: [PATCH] LibWeb/CSS: Prepare Size for use in GridSize

Make it constructible from a LengthPercentage, report whether it
contains a length-percentage, and add an equality operator.
---
 Libraries/LibWeb/CSS/Size.cpp | 12 ++++++++++++
 Libraries/LibWeb/CSS/Size.h   |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/Libraries/LibWeb/CSS/Size.cpp b/Libraries/LibWeb/CSS/Size.cpp
index 81d88089c9a..67848ad82ad 100644
--- a/Libraries/LibWeb/CSS/Size.cpp
+++ b/Libraries/LibWeb/CSS/Size.cpp
@@ -44,6 +44,18 @@ Size Size::make_calculated(NonnullRefPtr<CalculatedStyleValue const> calculated)
     return Size { Type::Calculated, move(calculated) };
 }
 
+Size Size::make_length_percentage(LengthPercentage const& length_percentage)
+{
+    if (length_percentage.is_auto())
+        return make_auto();
+    if (length_percentage.is_length())
+        return make_length(length_percentage.length());
+    if (length_percentage.is_percentage())
+        return make_percentage(length_percentage.percentage());
+    VERIFY(length_percentage.is_calculated());
+    return make_calculated(length_percentage.calculated());
+}
+
 Size Size::make_min_content()
 {
     return Size { Type::MinContent, Length::make_auto() };
diff --git a/Libraries/LibWeb/CSS/Size.h b/Libraries/LibWeb/CSS/Size.h
index 6ff774ba6f0..1cc5a8c6dcc 100644
--- a/Libraries/LibWeb/CSS/Size.h
+++ b/Libraries/LibWeb/CSS/Size.h
@@ -30,6 +30,7 @@ public:
     static Size make_length(Length);
     static Size make_percentage(Percentage);
     static Size make_calculated(NonnullRefPtr<CalculatedStyleValue const>);
+    static Size make_length_percentage(LengthPercentage const&);
     static Size make_min_content();
     static Size make_max_content();
     static Size make_fit_content(LengthPercentage available_space);
@@ -45,6 +46,8 @@ public:
     bool is_fit_content() const { return m_type == Type::FitContent; }
     bool is_none() const { return m_type == Type::None; }
 
+    bool is_length_percentage() const { return is_length() || is_percentage() || is_calculated(); }
+
     [[nodiscard]] CSSPixels to_px(Layout::Node const&, CSSPixels reference_value) const;
 
     bool contains_percentage() const;
@@ -74,6 +77,7 @@ public:
     }
 
     String to_string(SerializationMode) const;
+    bool operator==(Size const&) const = default;
 
 private:
     Size(Type type, LengthPercentage);