Module scroll 

Scroll system — independent subsystems mirroring Chrome’s cc/ architecture.

Chrome: cc/input/ (scroll nodes, input handler) + cc/trees/ (scroll tree, transform tree).

• [ScrollNode] — per-element geometry (container size, content size, axis constraints).
• ScrollTree — parent-child topology for the scroll chain.
• ScrollOffsets — mutable scroll displacement per node.
• [controller] — applies deltas along the chain with clamping.

Default actions (keyboard scroll, wheel scroll) live in input::default_action — the scroll system only knows about geometry and offsets, not input events.

Re-exports

pub use offsets::ScrollOffsets;

pub use tree::ScrollTree;

Modules

offsets

Scroll offsets — mutable scroll position per node.

tree

Scroll tree — topology of scrollable nodes.