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LibWeb: Use cached UsedValues pointer in IFC and its helper classes

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This avoids expensive LayoutState lookups when we already have the
pointer sitting around anyway.
This commit is contained in:
Andreas Kling 2024-03-15 19:25:00 +01:00
commit 1cea4e6407
Notes: sideshowbarker 2024-07-16 21:39:23 +09:00
7 changed files with 48 additions and 45 deletions
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24
Userland/Libraries/LibWeb/Layout/LineBuilder.cpp
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@ -10,12 +10,12 @@
namespace Web::Layout {
LineBuilder::LineBuilder(InlineFormattingContext& context, LayoutState& layout_state)
LineBuilder::LineBuilder(InlineFormattingContext& context, LayoutState& layout_state, LayoutState::UsedValues& containing_block_used_values)
: m_context(context)
, m_layout_state(layout_state)
, m_containing_block_state(layout_state.get_mutable(context.containing_block()))
, m_containing_block_used_values(containing_block_used_values)
{
m_text_indent = m_context.containing_block().computed_values().text_indent().to_px(m_context.containing_block(), m_containing_block_state.content_width());
m_text_indent = m_context.containing_block().computed_values().text_indent().to_px(m_context.containing_block(), m_containing_block_used_values.content_width());
begin_new_line(false);
}
@ -35,7 +35,7 @@ void LineBuilder::break_line(ForcedBreak forced_break, Optional<CSSPixels> next_
size_t break_count = 0;
bool floats_intrude_at_current_y = false;
do {
m_containing_block_state.line_boxes.append(LineBox());
m_containing_block_used_values.line_boxes.append(LineBox());
begin_new_line(true, break_count == 0);
break_count++;
floats_intrude_at_current_y = m_context.any_floats_intrude_at_y(m_current_y);
@ -71,14 +71,14 @@ void LineBuilder::begin_new_line(bool increment_y, bool is_first_break_in_sequen
m_last_line_needs_update = true;
// FIXME: Support text-indent with "each-line".
if (m_containing_block_state.line_boxes.size() <= 1) {
if (m_containing_block_used_values.line_boxes.size() <= 1) {
ensure_last_line_box().m_width += m_text_indent;
}
}
LineBox& LineBuilder::ensure_last_line_box()
{
auto& line_boxes = m_containing_block_state.line_boxes;
auto& line_boxes = m_containing_block_used_values.line_boxes;
if (line_boxes.is_empty())
line_boxes.append(LineBox {});
return line_boxes.last();
@ -92,7 +92,7 @@ void LineBuilder::append_box(Box const& box, CSSPixels leading_size, CSSPixels t
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,
.line_box_index = m_containing_block_used_values.line_boxes.size() - 1,
.fragment_index = line_box.fragments().size() - 1,
};
}
@ -139,7 +139,7 @@ bool LineBuilder::should_break(CSSPixels next_item_width)
if (m_available_width_for_current_line.is_max_content())
return false;
auto const& line_boxes = m_containing_block_state.line_boxes;
auto const& line_boxes = m_containing_block_used_values.line_boxes;
if (line_boxes.is_empty() || line_boxes.last().is_empty()) {
// If we don't have a single line box yet *and* there are no floats intruding
// at this Y coordinate, we don't need to break before inserting anything.
@ -155,7 +155,7 @@ bool LineBuilder::should_break(CSSPixels next_item_width)
void LineBuilder::update_last_line()
{
m_last_line_needs_update = false;
auto& line_boxes = m_containing_block_state.line_boxes;
auto& line_boxes = m_containing_block_used_values.line_boxes;
if (line_boxes.is_empty())
return;
@ -330,7 +330,7 @@ void LineBuilder::update_last_line()
void LineBuilder::remove_last_line_if_empty()
{
// If there's an empty line box at the bottom, just remove it instead of giving it height.
auto& line_boxes = m_containing_block_state.line_boxes;
auto& line_boxes = m_containing_block_used_values.line_boxes;
if (!line_boxes.is_empty() && line_boxes.last().is_empty()) {
line_boxes.take_last();
m_last_line_needs_update = false;
@ -343,8 +343,8 @@ void LineBuilder::recalculate_available_space()
auto available_at_top_of_line_box = m_context.available_space_for_line(m_current_y);
auto available_at_bottom_of_line_box = m_context.available_space_for_line(m_current_y + current_line_height - 1);
m_available_width_for_current_line = min(available_at_bottom_of_line_box, available_at_top_of_line_box);
if (!m_containing_block_state.line_boxes.is_empty())
m_containing_block_state.line_boxes.last().m_original_available_width = m_available_width_for_current_line;
if (!m_containing_block_used_values.line_boxes.is_empty())
m_containing_block_used_values.line_boxes.last().m_original_available_width = m_available_width_for_current_line;
}
}