Class StyleEngine

The incremental engine (G3L:STY-004). Holds resolved attributes and the rule/field indexes; changes recompute the minimum element set the declarations allow.

Index

Constructors

Methods

applyDataChange get load setClasses setOverride setStates stats

Constructors

constructor

new StyleEngine(config: StyleEngineConfig): StyleEngine
Parameters
- config: StyleEngineConfig
Returns StyleEngine
- Defined in core/src/style/style-engine.ts:340

Methods

applyDataChange

applyDataChange(
elementId: string,
changedFields: readonly string[],
): InvalidationResult
A data change on one element: fields already written to the element by the caller; the engine recomputes the minimum set the declarations allow (G3L:STY-004). Unmatched fields cost ZERO evaluations.
Parameters
- elementId: string
- changedFields: readonly string[]
Returns InvalidationResult
- Defined in core/src/style/style-engine.ts:471

get

get(id: string): VisualAttributes | undefined
Resolved attributes of one element (after load/changes).
Parameters
- id: string
Returns VisualAttributes | undefined
- Defined in core/src/style/style-engine.ts:411

load

load(graph: StyleGraph): Map<string, VisualAttributes>
Full (re)load: resolves every element.
Parameters
- graph: StyleGraph
Returns Map<string, VisualAttributes>
- Defined in core/src/style/style-engine.ts:416

setClasses

setClasses(elementId: string, classes: readonly string[]): InvalidationResult
Class toggle: exactly one element recomputes (G3L:STY-012).
Parameters
- elementId: string
- classes: readonly string[]
Returns InvalidationResult
- Defined in core/src/style/style-engine.ts:513

setOverride

setOverride(
elementId: string,
override: Partial<VisualAttributes> | null,
): InvalidationResult
Manual per-element override: highest layer (G3L:STY-001).
Parameters
- elementId: string
- override: Partial<VisualAttributes> | null
Returns InvalidationResult
- Defined in core/src/style/style-engine.ts:530

setStates

setStates(elementId: string, states: readonly string[]): InvalidationResult
State overlay change: exactly one element recomputes (G3L:STY-005: states compose without touching base layers of other elements).
Parameters
- elementId: string
- states: readonly string[]
Returns InvalidationResult
- Defined in core/src/style/style-engine.ts:499

stats

stats(): { evaluations: number }
Total rule evaluations since construction (test instrumentation).

Returns { evaluations: number }
- Defined in core/src/style/style-engine.ts:406