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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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16
Userland/Libraries/LibWeb/Layout/LineBuilder.cpp
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@ -78,7 +78,7 @@ void LineBuilder::append_box(Box const& box, CSSPixels leading_size, CSSPixels t
auto& box_state = m_layout_state.get_mutable(box);
auto& line_box = ensure_last_line_box();
line_box.add_fragment(box, 0, 0, leading_size, trailing_size, leading_margin, trailing_margin, box_state.content_width(), box_state.content_height(), box_state.border_box_top(), box_state.border_box_bottom());
m_max_height_on_current_line = max(m_max_height_on_current_line, box_state.border_box_height());
m_max_height_on_current_line = max(m_max_height_on_current_line, box_state.margin_box_height());
box_state.containing_line_box_fragment = LineBoxFragmentCoordinate {
.line_box_index = m_containing_block_state.line_boxes.size() - 1,
@ -235,11 +235,17 @@ void LineBuilder::update_last_line()
CSSPixels new_fragment_y = 0;
auto y_value_for_alignment = [&](CSS::VerticalAlign vertical_align) {
CSSPixels effective_box_top = fragment.border_box_top();
if (fragment.is_atomic_inline()) {
auto const& fragment_box_state = m_layout_state.get(static_cast<Box const&>(fragment.layout_node()));
effective_box_top = fragment_box_state.margin_box_top();
}
switch (vertical_align) {
case CSS::VerticalAlign::Baseline:
return m_current_y + line_box_baseline - fragment.baseline() + fragment.border_box_top();
return m_current_y + line_box_baseline - fragment.baseline() + effective_box_top;
case CSS::VerticalAlign::Top:
return m_current_y + fragment.border_box_top();
return m_current_y + effective_box_top;
case CSS::VerticalAlign::Middle:
case CSS::VerticalAlign::Bottom:
case CSS::VerticalAlign::Sub:
@ -247,7 +253,7 @@ void LineBuilder::update_last_line()
case CSS::VerticalAlign::TextBottom:
case CSS::VerticalAlign::TextTop:
// FIXME: These are all 'baseline'
return m_current_y + line_box_baseline - fragment.baseline() + fragment.border_box_top();
return m_current_y + line_box_baseline - fragment.baseline() + effective_box_top;
}
VERIFY_NOT_REACHED();
};
@ -268,7 +274,7 @@ void LineBuilder::update_last_line()
CSSPixels bottom_of_inline_box = 0;
{
// FIXME: Support inline-table elements.
if (fragment.layout_node().is_replaced_box() || (fragment.layout_node().display().is_inline_outside() && !fragment.layout_node().display().is_flow_inside())) {
if (fragment.is_atomic_inline()) {
auto const& fragment_box_state = m_layout_state.get(static_cast<Box const&>(fragment.layout_node()));
top_of_inline_box = (fragment.offset().y() - fragment_box_state.margin_box_top());
bottom_of_inline_box = (fragment.offset().y() + fragment_box_state.content_height() + fragment_box_state.margin_box_bottom());