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LibWeb: Move painting logic from Layout::Viewport to ViewportPaintable

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This commit is contained in:
Andreas Kling 2023-08-19 08:38:51 +02:00
parent c01c4b41e2
commit 8bb275f2ea
9 changed files with 54 additions and 48 deletions
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36
Userland/Libraries/LibWeb/Painting/ViewportPaintable.cpp
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@ -5,6 +5,7 @@
*/
#include <LibWeb/Layout/Viewport.h>
#include <LibWeb/Painting/StackingContext.h>
#include <LibWeb/Painting/ViewportPaintable.h>
namespace Web::Painting {
@ -21,4 +22,39 @@ ViewportPaintable::ViewportPaintable(Layout::Viewport const& layout_viewport)
ViewportPaintable::~ViewportPaintable() = default;
void ViewportPaintable::build_stacking_context_tree_if_needed()
{
if (stacking_context())
return;
build_stacking_context_tree();
}
void ViewportPaintable::build_stacking_context_tree()
{
set_stacking_context(make<StackingContext>(layout_box(), nullptr, 0));
size_t index_in_tree_order = 1;
for_each_in_subtree_of_type<PaintableBox>([&](PaintableBox const& paintable) {
auto& paintable_box = const_cast<PaintableBox&>(paintable);
paintable_box.invalidate_stacking_context();
if (!paintable_box.layout_box().establishes_stacking_context()) {
VERIFY(!paintable_box.stacking_context());
return TraversalDecision::Continue;
}
auto* parent_context = paintable_box.enclosing_stacking_context();
VERIFY(parent_context);
paintable_box.set_stacking_context(make<Painting::StackingContext>(paintable_box.layout_box(), parent_context, index_in_tree_order++));
return TraversalDecision::Continue;
});
stacking_context()->sort();
}
void ViewportPaintable::paint_all_phases(PaintContext& context)
{
build_stacking_context_tree_if_needed();
context.painter().translate(-context.device_viewport_rect().location().to_type<int>());
stacking_context()->paint(context);
}
}