Struct CpuHitTester 

pub struct CpuHitTester { /* private fields */ }

CPU-based hit tester that works without WebRender.

In the GPU path, hit testing is done by AsyncHitTester which queries WebRender’s spatial tree. In headless mode, we do hit testing directly against the layout results (positioned rectangles).

This is actually simpler and faster than the WebRender path, since we don’t need to go through the compositor’s spatial tree — we just walk the layout result nodes and check point-in-rect.

Implementations

impl CpuHitTester

pub fn new() -> Self

Create a new empty hit tester.

pub fn node_rects_total(&self) -> usize

Sum of HitTestEntry counts across all DomIds (for leak probes).

pub fn rebuild_from_layout( &mut self, layout_results: &BTreeMap<DomId, DomLayoutResult>, )

Rebuild the hit test structure from layout results.

Called after each layout pass. Extracts positioned rectangles from LayoutWindow::layout_results and builds a flat list for fast point-in-rect testing.

pub fn hit_test(&self, position: LogicalPosition) -> Vec<(DomId, NodeId)>

Perform a hit test at the given position.

Returns nodes hit at (x, y) in reverse paint order (topmost first).