mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-26 01:35:08 +02:00
331815f327
We previously supported autoscroll while the middle mouse button was pressed. We now also support clicking the middle mouse button in-place to begin autoscroll. Pressing any mouse button or the escape key will exit this mode.
40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
/*
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* Copyright (c) 2026, Tim Flynn <trflynn89@ladybird.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 <LibGC/Ptr.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/PixelUnits.h>
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namespace Web {
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class MiddleButtonScrollHandler {
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public:
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MiddleButtonScrollHandler(DOM::Element& container, CSSPixelPoint origin);
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~MiddleButtonScrollHandler();
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void visit_edges(JS::Cell::Visitor&) const;
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static GC::Ptr<DOM::Element> find_scrollable_ancestor(DOM::Document&, Painting::Paintable&);
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void update_mouse_position(CSSPixelPoint position) { m_mouse_position = position; }
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void perform_tick();
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CSSPixelPoint origin() const { return m_origin; }
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bool mouse_has_moved_beyond_dead_zone() const { return m_mouse_has_moved_beyond_dead_zone; }
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private:
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GC::Ref<DOM::Element> m_container_element;
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CSSPixelPoint m_origin;
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CSSPixelPoint m_mouse_position;
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CSSPixelPoint m_fractional_delta;
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bool m_mouse_has_moved_beyond_dead_zone { false };
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};
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}
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