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LibWeb: Add Paintable::stacking_context_rooted_here()

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This is a convenience helper that lets you get the stacking context
rooted at a given paintable, without checking that the paintable is a
box first.
This commit is contained in:
Andreas Kling 2023-07-14 10:02:19 +02:00
parent 2138c164c9
commit 268492413a
3 changed files with 12 additions and 2 deletions
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10
Userland/Libraries/LibWeb/Painting/Paintable.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022-2023, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -7,6 +7,7 @@
#include <LibWeb/DOM/Document.h>
#include <LibWeb/Layout/BlockContainer.h>
#include <LibWeb/Painting/Paintable.h>
#include <LibWeb/Painting/PaintableBox.h>
namespace Web::Painting {
@ -86,4 +87,11 @@ Paintable const* Paintable::previous_sibling() const
return layout_node ? layout_node->paintable() : nullptr;
}
StackingContext const* Paintable::stacking_context_rooted_here() const
{
if (!layout_node().is_box())
return nullptr;
return static_cast<PaintableBox const&>(*this).stacking_context();
}
}