Module layout

Modules§

coordinator: Node coordinator system mirroring Jetpack Compose’s NodeCoordinator pattern.
core
policies

LayoutBox: Layout information for a single node.
LayoutMeasurements: Result of running the measure pass for a Compose layout tree.
LayoutNodeData: Snapshot of the data required to render a layout node.
LayoutTree: Result of running layout for a Compose tree.
SemanticsCallback: Discrete event callback reference produced during semantics extraction.
SemanticsNode: A single node within the semantics tree.
SemanticsOwner: Caches semantics configurations for layout nodes, similar to Jetpack Compose’s SemanticsOwner. This enables lazy semantics tree construction and efficient invalidation.
SemanticsTree: Rooted semantics tree extracted after layout.

LayoutNodeKind: Classification of the node captured inside a LayoutBox.
SemanticsAction: Semantics action exposed to the input system.
SemanticsRole: Semantic role describing how a node should participate in accessibility and hit testing. Roles are now derived from SemanticsConfiguration rather than widget types.

LayoutEngine: Extension trait that equips MemoryApplier with layout computation.

measure_layout: Runs the measure phase for the subtree rooted at root.
tree_needs_layout: Check if a node or any of its descendants needs measure (selective measure optimization). This can be used by the app shell to skip layout when the tree is clean.