Struct HitTest

pub(crate) struct HitTest<'a> {
    flags: ElementsFromPointFlags,
    point_to_test: LayoutPoint,
    projected_point_to_test: Option<(ScrollTreeNodeId, LayoutPoint, FastLayoutTransform)>,
    stacking_context_tree: &'a StackingContextTree,
    results: Vec<ElementsFromPointResult>,
    clip_hit_test_results: HashMap<ClipId, bool>,
}

Fields

flags: ElementsFromPointFlags

The flags which describe how to perform this HitTest.

point_to_test: LayoutPoint

The point to test for this hit test, relative to the page.

projected_point_to_test: Option<(ScrollTreeNodeId, LayoutPoint, FastLayoutTransform)>

A cached version of Self::point_to_test projected to a spatial node, to avoid doing a lot of matrix math over and over.

stacking_context_tree: &'a StackingContextTree

The stacking context tree against which to perform the hit test.

results: Vec<ElementsFromPointResult>

The resulting [HitTestResultItems] for this hit test.

clip_hit_test_results: HashMap<ClipId, bool>

A cache of hit test results for shared clip nodes.

Implementations

impl<'a> HitTest<'a>

pub(crate) fn run( stacking_context_tree: &'a StackingContextTree, point_to_test: LayoutPoint, flags: ElementsFromPointFlags, ) -> Vec<ElementsFromPointResult>

fn hit_test_clip_id(&mut self, clip_id: ClipId) -> bool

Perform a hit test against a the clip node for the given ClipId, returning true if it is not clipped out or false if is clipped out.

fn location_in_spatial_node( &mut self, scroll_tree_node_id: ScrollTreeNodeId, ) -> Option<(LayoutPoint, FastLayoutTransform)>

Get the hit test location in the coordinate system of the given spatial node, returning None if the transformation is uninvertible or the point cannot be projected into the spatial node.