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LibWeb: Factor out BFC "layout this block-level box" to a function

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This commit is contained in:
Andreas Kling 2022-07-09 20:14:13 +02:00
parent 64959a8504
commit 9784a567d2
2 changed files with 63 additions and 67 deletions
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128
Userland/Libraries/LibWeb/Layout/BlockFormattingContext.cpp
View file

@ -392,90 +392,84 @@ void BlockFormattingContext::layout_inline_children(BlockContainer const& block_
block_container_state.content_height = content_height;
}
void BlockFormattingContext::layout_block_level_box(Box const& box, BlockContainer const& block_container, LayoutMode layout_mode, float& content_height)
{
auto& box_state = m_state.get_mutable(box);
if (box.is_absolutely_positioned()) {
m_absolutely_positioned_boxes.append(box);
return;
}
// NOTE: ListItemMarkerBoxes are placed by their corresponding ListItemBox.
if (is<ListItemMarkerBox>(box))
return;
if (box.is_floating()) {
layout_floating_box(box, block_container, layout_mode);
content_height = max(content_height, box_state.offset.y() + box_state.content_height + box_state.margin_box_bottom());
return;
}
compute_width(box, layout_mode);
if (is<ReplacedBox>(box) || is<BlockContainer>(box))
place_block_level_element_in_normal_flow_vertically(box, block_container);
if (box.has_definite_height()) {
compute_height(box, m_state);
}
OwnPtr<FormattingContext> independent_formatting_context;
if (box.can_have_children()) {
if (box.children_are_inline()) {
layout_inline_children(verify_cast<BlockContainer>(box), layout_mode);
} else {
independent_formatting_context = create_independent_formatting_context_if_needed(m_state, box);
if (independent_formatting_context)
independent_formatting_context->run(box, layout_mode);
else
layout_block_level_children(verify_cast<BlockContainer>(box), layout_mode);
}
}
compute_height(box, m_state);
compute_inset(box);
if (is<ReplacedBox>(box) || is<BlockContainer>(box))
place_block_level_element_in_normal_flow_horizontally(box, block_container);
if (is<ListItemBox>(box)) {
layout_list_item_marker(static_cast<ListItemBox const&>(box));
}
content_height = max(content_height, box_state.offset.y() + box_state.content_height + box_state.margin_box_bottom());
if (independent_formatting_context)
independent_formatting_context->parent_context_did_dimension_child_root_box();
}
void BlockFormattingContext::layout_block_level_children(BlockContainer const& block_container, LayoutMode layout_mode)
{
VERIFY(!block_container.children_are_inline());
float content_height = 0;
float original_width = 0;
float original_height = 0;
if (layout_mode == LayoutMode::IntrinsicSizeDetermination) {
auto& block_container_state = m_state.get_mutable(block_container);
original_width = block_container_state.content_width;
original_height = block_container_state.content_height;
block_container_state.content_width = containing_block_width_for(block_container);
block_container_state.content_height = containing_block_height_for(block_container);
}
block_container.for_each_child_of_type<Box>([&](Box& child_box) {
auto& box_state = m_state.get_mutable(child_box);
if (child_box.is_absolutely_positioned()) {
m_absolutely_positioned_boxes.append(child_box);
return IterationDecision::Continue;
}
// NOTE: ListItemMarkerBoxes are placed by their corresponding ListItemBox.
if (is<ListItemMarkerBox>(child_box))
return IterationDecision::Continue;
if (child_box.is_floating()) {
layout_floating_box(child_box, block_container, layout_mode);
content_height = max(content_height, box_state.offset.y() + box_state.content_height + box_state.margin_box_bottom());
return IterationDecision::Continue;
}
compute_width(child_box, layout_mode);
if (is<ReplacedBox>(child_box) || is<BlockContainer>(child_box))
place_block_level_element_in_normal_flow_vertically(child_box, block_container);
if (child_box.has_definite_height()) {
compute_height(child_box, m_state);
}
OwnPtr<FormattingContext> independent_formatting_context;
if (child_box.can_have_children()) {
if (child_box.children_are_inline()) {
layout_inline_children(verify_cast<BlockContainer>(child_box), layout_mode);
} else {
independent_formatting_context = create_independent_formatting_context_if_needed(m_state, child_box);
if (independent_formatting_context)
independent_formatting_context->run(child_box, layout_mode);
else
layout_block_level_children(verify_cast<BlockContainer>(child_box), layout_mode);
}
}
compute_height(child_box, m_state);
compute_inset(child_box);
if (is<ReplacedBox>(child_box) || is<BlockContainer>(child_box))
place_block_level_element_in_normal_flow_horizontally(child_box, block_container);
if (is<ListItemBox>(child_box)) {
layout_list_item_marker(static_cast<ListItemBox const&>(child_box));
}
content_height = max(content_height, box_state.offset.y() + box_state.content_height + box_state.margin_box_bottom());
if (independent_formatting_context)
independent_formatting_context->parent_context_did_dimension_child_root_box();
block_container.for_each_child_of_type<Box>([&](Box& box) {
layout_block_level_box(box, block_container, layout_mode, content_height);
return IterationDecision::Continue;
});
if (layout_mode == LayoutMode::IntrinsicSizeDetermination) {
auto& block_container_state = m_state.get_mutable(block_container);
if (block_container_state.width_constraint != SizeConstraint::None)
block_container_state.content_width = greatest_child_width(block_container);
else
block_container_state.content_width = original_width;
if (block_container_state.height_constraint != SizeConstraint::None)
block_container_state.content_height = content_height;
else
block_container_state.content_height = original_height;
block_container_state.content_width = greatest_child_width(block_container);
block_container_state.content_height = content_height;
}
}

2
Userland/Libraries/LibWeb/Layout/BlockFormattingContext.h
View file

@ -46,6 +46,8 @@ public:
void layout_floating_box(Box const& child, BlockContainer const& containing_block, LayoutMode, LineBuilder* = nullptr);
void layout_block_level_box(Box const&, BlockContainer const&, LayoutMode, float& content_height);
private:
virtual bool is_block_formatting_context() const final { return true; }