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LibWeb: Change StackingContext::hit_test() to accept callback
This change modifies hit_test() to no longer return the first paintable encountered at a specified position. Instead, this function accepts a callback that is invoked for each paintable located at a position, in hit-testing order. This modification will allow us to reuse this call for `Document.elementsFromPoint()` in upcoming changes.
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11 changed files with 120 additions and 104 deletions
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@ -136,7 +136,8 @@ public:
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virtual void apply_clip_overflow_rect(PaintContext&, PaintPhase) const override;
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virtual void clear_clip_overflow_rect(PaintContext&, PaintPhase) const override;
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virtual Optional<HitTestResult> hit_test(CSSPixelPoint, HitTestType) const override;
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[[nodiscard]] virtual TraversalDecision hit_test(CSSPixelPoint position, HitTestType type, Function<TraversalDecision(HitTestResult)> const& callback) const override;
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Optional<HitTestResult> hit_test(CSSPixelPoint, HitTestType) const;
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virtual bool handle_mousewheel(Badge<EventHandler>, CSSPixelPoint, unsigned buttons, unsigned modifiers, int wheel_delta_x, int wheel_delta_y) override;
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@ -286,7 +287,7 @@ public:
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virtual void paint(PaintContext&, PaintPhase) const override;
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virtual bool wants_mouse_events() const override { return false; }
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virtual Optional<HitTestResult> hit_test(CSSPixelPoint, HitTestType) const override;
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[[nodiscard]] virtual TraversalDecision hit_test(CSSPixelPoint position, HitTestType type, Function<TraversalDecision(HitTestResult)> const& callback) const override;
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virtual void visit_edges(Cell::Visitor& visitor) override
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{
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