Module modifier 

Modifier node scaffolding for Cranpose.

This module defines the foundational pieces of the future Modifier.Node system described in the project roadmap. It introduces traits for modifier nodes and their contexts as well as a light-weight chain container that can reconcile nodes across updates. The implementation focuses on the core runtime plumbing so UI crates can begin migrating without expanding the public API surface.

Structs

BasicModifierNodeContext

Lightweight ModifierNodeContext implementation that records invalidation requests and update signals.

Constraints

Constraints used during layout measurement.

ModifierChainIter

Iterator walking a modifier chain either from head-to-tail or tail-to-head.

ModifierChainNodeRef

ModifierInvalidation

Records an invalidation request together with the capability mask that triggered it.

ModifierNodeChain

Chain of modifier nodes attached to a layout node.

NodeCapabilities

Capability flags indicating which specialized traits a modifier node implements.

NodeState

Runtime state tracked for every ModifierNode.

SemanticsConfiguration

Semantics configuration for accessibility.

Size

Enums

FocusState

Focus state of a focus target node.

InvalidationKind

Identifies which part of the rendering pipeline should be invalidated after a modifier node changes state.

Traits

AnyModifierElement

Type-erased modifier element used by the runtime to reconcile chains.

DelegatableNode

Provides traversal helpers that mirror Jetpack Compose’s DelegatableNode contract.

DrawModifierNode

Marker trait for draw-specific modifier nodes.

DrawScope

FocusNode

Marker trait for focus modifier nodes.

LayoutModifierNode

Marker trait for layout-specific modifier nodes.

Measurable

Object capable of measuring a layout child and exposing intrinsic sizes.

ModifierElement

Transitional alias so existing call sites that refer to ModifierElement keep compiling while the ecosystem migrates to ModifierNodeElement.

ModifierNode

Core trait implemented by modifier nodes.

ModifierNodeContext

Runtime services exposed to modifier nodes while attached to a tree.

ModifierNodeElement

Strongly typed modifier elements that can create and update nodes while exposing equality/hash/inspector contracts that mirror Jetpack Compose.

PointerInputNode

Marker trait for pointer input modifier nodes.

SemanticsNode

Marker trait for semantics modifier nodes.

Functions

modifier_element

Convenience helper for callers to construct a type-erased modifier element without having to mention the internal wrapper type.

Type Aliases

DynModifierElement

Boxed type-erased modifier element.