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LibWeb: Consider margins of atomic inlines in layout

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According to CSS Inline Layout Module Level 3 § 2.2 Step 1. atomic
inlines should be layed out in a line box based on their margin box.

However, up until this patch we were unconditionally considering only
the border box during line box height calculation. This made us
essentially drop all vertical margins for atomic inlines.
This commit is contained in:
Mathis Wiehl 2023-03-14 10:28:01 +01:00 • committed by Andreas Kling
parent 0aa4466ce9
commit b96920a9d6
11 changed files with 98 additions and 8 deletions
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6
Userland/Libraries/LibWeb/Layout/LayoutState.cpp
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@ -110,7 +110,7 @@ CSSPixels box_baseline(LayoutState const& state, Box const& box)
return box_state.border_box_top();
case CSS::VerticalAlign::Bottom:
// Bottom: Align the bottom of the aligned subtree with the bottom of the line box.
return box_state.content_height() + box_state.border_box_bottom();
return box_state.content_height() + box_state.margin_box_top();
case CSS::VerticalAlign::TextTop:
// TextTop: Align the top of the box with the top of the parent's content area (see 10.6.1).
return box.computed_values().font_size();
@ -123,13 +123,13 @@ CSSPixels box_baseline(LayoutState const& state, Box const& box)
}
if (!box_state.line_boxes.is_empty())
return box_state.border_box_top() + box_state.offset.y() + box_state.line_boxes.last().baseline();
return box_state.margin_box_top() + box_state.offset.y() + box_state.line_boxes.last().baseline();
if (box.has_children() && !box.children_are_inline()) {
auto const* child_box = box.last_child_of_type<Box>();
VERIFY(child_box);
return box_baseline(state, *child_box);
}
return box_state.border_box_height();
return box_state.margin_box_height();
}
CSSPixelRect margin_box_rect(Box const& box, LayoutState const& state)