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LibWeb: Account for scroll offset in hit-testing

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The hit-testing position is now shifted by the scroll offsets before
performing any checks for containment. This is implemented by assigning
each PaintableBox/InlinePaintable an offset corresponding to the scroll
frame in which it is contained. The non-scroll-adjusted position is
still passed down when recursing to children because the assigned
offset accumulated for nested scroll frames.

With this change, hit testing works in the Inspector.
Fixes https://github.com/SerenityOS/serenity/issues/22068
This commit is contained in:
Aliaksandr Kalenik 2024-01-29 06:28:17 +01:00 • committed by Andreas Kling
parent beb1c85b6b
commit 556679fedd
7 changed files with 81 additions and 10 deletions
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2
Userland/Libraries/LibWeb/Painting/InlinePaintable.h
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@ -38,6 +38,7 @@ public:
Vector<ShadowData> const& box_shadow_data() const { return m_box_shadow_data; }
void set_scroll_frame_id(int id) { m_scroll_frame_id = id; }
void set_enclosing_scroll_frame_offset(CSSPixelPoint offset) { m_enclosing_scroll_frame_offset = offset; }
void set_clip_rect(Optional<CSSPixelRect> rect) { m_clip_rect = rect; }
private:
@ -47,6 +48,7 @@ private:
void for_each_fragment(Callback) const;
Optional<int> m_scroll_frame_id;
Optional<CSSPixelPoint> m_enclosing_scroll_frame_offset;
Optional<CSSPixelRect> m_clip_rect;
Vector<ShadowData> m_box_shadow_data;