LibWeb: Make box content sizes indefinite before intrinsic sizing

When calculating the intrinsic width of a box, we now make its content
width & height indefinite before entering the intrinsic sizing layout.
This ensures that any geometry assigned to the box by its parent
formatting context is ignored.

For intrinsic heights, we only make the content height indefinite.
This is because used content width is a valid (but optional) input
to intrinsic height calculation.

Userland/Libraries/LibWeb/Layout/FormattingContext.cpp

@@ -1093,6 +1093,8 @@ CSSPixels FormattingContext::calculate_min_content_width(Layout::Box const& box)
 
     auto& box_state = throwaway_state.get_mutable(box);
     box_state.width_constraint = SizeConstraint::MinContent;
+    box_state.set_indefinite_content_width();
+    box_state.set_indefinite_content_height();
 
     auto context = const_cast<FormattingContext*>(this)->create_independent_formatting_context_if_needed(throwaway_state, box);
     VERIFY(context);
@@ -1127,6 +1129,8 @@ CSSPixels FormattingContext::calculate_max_content_width(Layout::Box const& box)
 
     auto& box_state = throwaway_state.get_mutable(box);
     box_state.width_constraint = SizeConstraint::MaxContent;
+    box_state.set_indefinite_content_width();
+    box_state.set_indefinite_content_height();
 
     auto context = const_cast<FormattingContext*>(this)->create_independent_formatting_context_if_needed(throwaway_state, box);
     VERIFY(context);
@@ -1177,6 +1181,9 @@ CSSPixels FormattingContext::calculate_min_content_height(Layout::Box const& box
 
     auto& box_state = throwaway_state.get_mutable(box);
     box_state.height_constraint = SizeConstraint::MinContent;
+    box_state.set_indefinite_content_height();
+    if (available_width.is_definite())
+        box_state.set_content_width(available_width.to_px());
 
     auto context = const_cast<FormattingContext*>(this)->create_independent_formatting_context_if_needed(throwaway_state, box);
     VERIFY(context);
@@ -1222,6 +1229,9 @@ CSSPixels FormattingContext::calculate_max_content_height(Layout::Box const& box
 
     auto& box_state = throwaway_state.get_mutable(box);
     box_state.height_constraint = SizeConstraint::MaxContent;
+    box_state.set_indefinite_content_height();
+    if (available_width.is_definite())
+        box_state.set_content_width(available_width.to_px());
 
     auto context = const_cast<FormattingContext*>(this)->create_independent_formatting_context_if_needed(throwaway_state, box);
     VERIFY(context);

Userland/Libraries/LibWeb/Layout/LayoutState.cpp

@@ -416,4 +416,14 @@ void LayoutState::UsedValues::set_content_y(CSSPixels y)
     offset.set_y(y);
 }
 
+void LayoutState::UsedValues::set_indefinite_content_width()
+{
+    m_has_definite_width = false;
+}
+
+void LayoutState::UsedValues::set_indefinite_content_height()
+{
+    m_has_definite_height = false;
+}
+
 }

Userland/Libraries/LibWeb/Layout/LayoutState.h

@@ -53,6 +53,9 @@ struct LayoutState {
         void set_content_width(CSSPixels);
         void set_content_height(CSSPixels);
 
+        void set_indefinite_content_width();
+        void set_indefinite_content_height();
+
         // NOTE: These are used by FlexFormattingContext to assign a temporary main size to items
         //       early on, so that descendants have something to resolve percentages against.
         void set_temporary_content_width(CSSPixels);