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e806136116
Although refreshing is cheap, it was performed before each hit-testing and was 2-4% in profiles on Discord and Twitter. Now clip and scroll states are refreshed only if scroll offset has changed.
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/*
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* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/Painting/PaintableBox.h>
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namespace Web::Painting {
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class ViewportPaintable final : public PaintableWithLines {
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JS_CELL(ViewportPaintable, PaintableWithLines);
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JS_DECLARE_ALLOCATOR(ViewportPaintable);
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public:
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static JS::NonnullGCPtr<ViewportPaintable> create(Layout::Viewport const&);
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virtual ~ViewportPaintable() override;
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void paint_all_phases(PaintContext&);
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void build_stacking_context_tree_if_needed();
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HashMap<JS::GCPtr<PaintableBox const>, RefPtr<ScrollFrame>> scroll_state;
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void assign_scroll_frames();
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void refresh_scroll_state();
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HashMap<JS::GCPtr<PaintableBox const>, RefPtr<ClipFrame>> clip_state;
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void assign_clip_frames();
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void refresh_clip_state();
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void resolve_paint_only_properties();
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JS::GCPtr<Selection::Selection> selection() const;
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void recompute_selection_states();
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bool handle_mousewheel(Badge<EventHandler>, CSSPixelPoint, unsigned, unsigned, int wheel_delta_x, int wheel_delta_y) override;
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void set_needs_to_refresh_clip_state(bool value) { m_needs_to_refresh_clip_state = value; }
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void set_needs_to_refresh_scroll_state(bool value) { m_needs_to_refresh_scroll_state = value; }
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private:
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void build_stacking_context_tree();
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explicit ViewportPaintable(Layout::Viewport const&);
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virtual void visit_edges(Visitor&) override;
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bool m_needs_to_refresh_clip_state { true };
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bool m_needs_to_refresh_scroll_state { true };
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};
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}
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