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LibWeb: Fix the x coordinate of a block after a float

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The margin from the containing blocks shouldn't be included in the
amount by which we increment x after a float was places. That coordinate
should be relative to the containing block.

Fixes the comments layout on https://lobste.rs.
This commit is contained in:
Andi Gallo 2023-06-13 13:37:15 +00:00 • committed by Andreas Kling
parent 0db8ac7465
commit ce186dca70
6 changed files with 86 additions and 19 deletions
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28
Userland/Libraries/LibWeb/Layout/BlockFormattingContext.cpp
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@ -808,9 +808,9 @@ void BlockFormattingContext::place_block_level_element_in_normal_flow_horizontal
if ((!m_left_floats.current_boxes.is_empty() || !m_right_floats.current_boxes.is_empty())
&& creates_block_formatting_context(child_box)) {
auto box_in_root_rect = content_box_rect_in_ancestor_coordinate_space(child_box, root());
auto space = space_used_by_floats(box_in_root_rect.y());
available_width_within_containing_block -= space.left + space.right;
x += space.left;
auto space_and_containing_margin = space_used_and_containing_margin_for_floats(box_in_root_rect.y());
available_width_within_containing_block -= space_and_containing_margin.left_used_space + space_and_containing_margin.right_used_space;
x += space_and_containing_margin.left_used_space;
}
if (child_box.containing_block()->computed_values().text_align() == CSS::TextAlign::LibwebCenter) {
@ -1027,9 +1027,9 @@ void BlockFormattingContext::layout_list_item_marker(ListItemBox const& list_ite
list_item_state.set_content_height(marker_state.content_height());
}
BlockFormattingContext::SpaceUsedByFloats BlockFormattingContext::space_used_by_floats(CSSPixels y) const
BlockFormattingContext::SpaceUsedAndContainingMarginForFloats BlockFormattingContext::space_used_and_containing_margin_for_floats(CSSPixels y) const
{
SpaceUsedByFloats space_used_by_floats;
SpaceUsedAndContainingMarginForFloats space_and_containing_margin;
for (auto const& floating_box_ptr : m_left_floats.all_boxes.in_reverse()) {
auto const& floating_box = *floating_box_ptr;
@ -1042,10 +1042,10 @@ BlockFormattingContext::SpaceUsedByFloats BlockFormattingContext::space_used_by_
auto const& containing_block_state = m_state.get(*containing_block);
offset_from_containing_block_chain_margins_between_here_and_root += containing_block_state.margin_box_left();
}
space_used_by_floats.left = offset_from_containing_block_chain_margins_between_here_and_root
+ floating_box.offset_from_edge
space_and_containing_margin.left_used_space = floating_box.offset_from_edge
+ floating_box_state.content_width()
+ floating_box_state.margin_box_right();
space_and_containing_margin.left_total_containing_margin = offset_from_containing_block_chain_margins_between_here_and_root;
break;
}
}
@ -1061,14 +1061,14 @@ BlockFormattingContext::SpaceUsedByFloats BlockFormattingContext::space_used_by_
auto const& containing_block_state = m_state.get(*containing_block);
offset_from_containing_block_chain_margins_between_here_and_root += containing_block_state.margin_box_right();
}
space_used_by_floats.right = offset_from_containing_block_chain_margins_between_here_and_root
+ floating_box.offset_from_edge
space_and_containing_margin.right_used_space = floating_box.offset_from_edge
+ floating_box_state.margin_box_left();
space_and_containing_margin.right_total_containing_margin = offset_from_containing_block_chain_margins_between_here_and_root;
break;
}
}
return space_used_by_floats;
return space_and_containing_margin;
}
FormattingContext::SpaceUsedByFloats BlockFormattingContext::intrusion_by_floats_into_box(Box const& box, CSSPixels y_in_box) const
@ -1076,16 +1076,18 @@ FormattingContext::SpaceUsedByFloats BlockFormattingContext::intrusion_by_floats
// NOTE: Floats are relative to the BFC root box, not necessarily the containing block of this IFC.
auto box_in_root_rect = content_box_rect_in_ancestor_coordinate_space(box, root());
CSSPixels y_in_root = box_in_root_rect.y() + y_in_box;
auto space_used_by_floats_in_root = space_used_by_floats(y_in_root);
auto space_and_containing_margin = space_used_and_containing_margin_for_floats(y_in_root);
auto left_side_floats_limit_to_right = space_and_containing_margin.left_total_containing_margin + space_and_containing_margin.left_used_space;
auto right_side_floats_limit_to_right = space_and_containing_margin.right_used_space + space_and_containing_margin.right_total_containing_margin;
auto left_intrusion = max(CSSPixels(0), space_used_by_floats_in_root.left - max(CSSPixels(0), box_in_root_rect.x()));
auto left_intrusion = max(CSSPixels(0), left_side_floats_limit_to_right - max(CSSPixels(0), box_in_root_rect.x()));
CSSPixels offset_from_containing_block_chain_margins_between_here_and_root = 0;
for (auto const* containing_block = static_cast<Box const*>(&box); containing_block && containing_block != &root(); containing_block = containing_block->containing_block()) {
auto const& containing_block_state = m_state.get(*containing_block);
offset_from_containing_block_chain_margins_between_here_and_root = max(offset_from_containing_block_chain_margins_between_here_and_root, containing_block_state.margin_box_right());
}
auto right_intrusion = max(CSSPixels(0), space_used_by_floats_in_root.right - offset_from_containing_block_chain_margins_between_here_and_root);
auto right_intrusion = max(CSSPixels(0), right_side_floats_limit_to_right - offset_from_containing_block_chain_margins_between_here_and_root);
return { left_intrusion, right_intrusion };
}