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LibWeb: Add virtuals to check if Paintable is PBox or PWithLines

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Instead of inferring the type of paintables by looking at the type of
their origin in the layout tree, let's ask them directly.
This commit is contained in:
Andreas Kling 2023-08-18 13:47:52 +02:00
parent 6b3af92262
commit 136ac1a6a5
Notes: sideshowbarker 2024-07-17 07:16:27 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/136ac1a6a5
Pull-request: https://github.com/SerenityOS/serenity/pull/20661
4 changed files with 16 additions and 7 deletions
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9
Userland/Libraries/LibWeb/Layout/LayoutState.cpp
View File

@ -82,8 +82,8 @@ static CSSPixelRect measure_scrollable_overflow(Box const& box)
auto scrollable_overflow_rect = paintable_box.absolute_padding_box_rect();
// - All line boxes directly contained by the scroll container.
if (box.is_block_container() && box.children_are_inline()) {
auto const& line_boxes = verify_cast<Painting::PaintableWithLines>(*box.paintable_box()).line_boxes();
if (is<Painting::PaintableWithLines>(box.paintable())) {
auto const& line_boxes = static_cast<Painting::PaintableWithLines const&>(*box.paintable()).line_boxes();
for (auto const& line_box : line_boxes) {
scrollable_overflow_rect = scrollable_overflow_rect.united(line_box.absolute_rect());
}
@ -238,8 +238,7 @@ void LayoutState::commit(Box& root)
node.set_paintable(paintable);
// For boxes, transfer all the state needed for painting.
if (is<Layout::Box>(node)) {
auto& box = static_cast<Layout::Box const&>(node);
if (paintable && is<Painting::PaintableBox>(*paintable)) {
auto& paintable_box = static_cast<Painting::PaintableBox&>(*paintable);
paintable_box.set_offset(used_values.offset);
paintable_box.set_content_size(used_values.content_width(), used_values.content_height());
@ -250,7 +249,7 @@ void LayoutState::commit(Box& root)
paintable_box.set_table_cell_coordinates(used_values.table_cell_coordinates().value());
}
if (is<Layout::BlockContainer>(box)) {
if (is<Painting::PaintableWithLines>(paintable_box)) {
auto& paintable_with_lines = static_cast<Painting::PaintableWithLines&>(paintable_box);
paintable_with_lines.set_line_boxes(move(used_values.line_boxes));
paintables_with_lines.append(paintable_with_lines);

2
Userland/Libraries/LibWeb/Painting/Paintable.cpp
View File

@ -79,7 +79,7 @@ Optional<HitTestResult> Paintable::hit_test(CSSPixelPoint, HitTestType) const
StackingContext const* Paintable::stacking_context_rooted_here() const
{
if (!layout_node().is_box())
if (!is<PaintableBox>(*this))
return nullptr;
return static_cast<PaintableBox const&>(*this).stacking_context();
}

8
Userland/Libraries/LibWeb/Painting/Paintable.h
View File

@ -154,6 +154,9 @@ public:
template<typename T>
bool fast_is() const = delete;
[[nodiscard]] virtual bool is_paintable_box() const { return false; }
[[nodiscard]] virtual bool is_paintable_with_lines() const { return false; }
StackingContext const* stacking_context_rooted_here() const;
protected:
@ -179,6 +182,9 @@ inline DOM::Node const* HitTestResult::dom_node() const
}
template<>
inline bool Paintable::fast_is<PaintableBox>() const { return m_layout_node->is_box(); }
inline bool Paintable::fast_is<PaintableBox>() const { return is_paintable_box(); }
template<>
inline bool Paintable::fast_is<PaintableWithLines>() const { return is_paintable_with_lines(); }
}

4
Userland/Libraries/LibWeb/Painting/PaintableBox.h
View File

@ -197,6 +197,8 @@ protected:
Vector<ShadowData> resolve_box_shadow_data() const;
private:
[[nodiscard]] virtual bool is_paintable_box() const final { return true; }
Optional<OverflowData> m_overflow_data;
CSSPixelPoint m_offset;
@ -249,6 +251,8 @@ protected:
PaintableWithLines(Layout::BlockContainer const&);
private:
[[nodiscard]] virtual bool is_paintable_with_lines() const final { return true; }
Vector<Layout::LineBox> m_line_boxes;
};