omena-wasm

omena-wasm exposes the first browser-side binding for the Omena CSS workspace. The binding consumes omena-query as the public Rust facade and keeps parser and transform crates behind that boundary.

The current API is intentionally in-memory:

• checkStyleSource(source, path) checks CSS-family source text and returns query-owned parser facts.
• buildStyleSource(source, path, passIds) runs conservative transform passes and returns the execution summary plus output CSS.
• buildStyleSourceWithContext(source, path, passIds, context) accepts explicit evaluator/provenance context and returns the execution summary plus output CSS.
• buildStyleSourceForTargetQuery(source, path, targetQuery) plans conservative target-sensitive passes from a Browserslist query or named target profile.
• buildStyleSourceForTargetQueryWithOptions(source, path, targetQuery, targetOptions) accepts camelCase target transform options for explicit lowering opt-ins.
• buildStyleSourceForTargetQueryWithContext(source, path, targetQuery, targetOptions, context) combines target planning with explicit evaluator context, including dart-sass-compatible SCSS output.
• buildStyleSourcesWithContext(targetPath, sources, passIds, context, packageManifests) derives import/composes context from an in-memory workspace source array, merges explicit evaluator/provenance context, and returns an execution summary plus output CSS.
• buildStyleSourcesForTargetQueryWithContext(targetPath, sources, targetQuery, targetOptions, context, packageManifests) combines target planning with workspace-derived import/composes context.
• readCascadeAtPosition(source, path, line, character, input) reads cascade, computed-value, and custom-property LFP information at a var(...) reference position. Pass null or undefined for input when no EngineInputV2 context is needed.
• readStyleContextIndex(source, path, input) reads query-owned @layer, @container, and @scope context indexes. Pass null or undefined for input when no EngineInputV2 context is needed.
• readStyleDiagnostics(source, path) reads query-owned style diagnostics for a CSS-family file.
• readStyleHoverCandidates(source, path) reads query-owned style hover candidates for a CSS-family file.
• readStyleCompletionAtPosition(source, path, line, character) reads query-owned style completions at a source position.
• readSourceDiagnostics(sourceUri, candidates) reads query-owned source diagnostics from precomputed missing-selector candidates.
• expressionDomainIncrementalFlow(input) runs one query-owned expression-domain incremental-flow pass for simple browser clients.
• new ExpressionDomainFlowRuntime().analyze(input) keeps the query-owned incremental-flow runtime alive across calls so browser clients can observe graph reuse.
• expressionDomainSelectorProjection(input) projects expression-domain flow values to target style selectors.
• listTransformPasses() lists transform pass ids accepted by buildStyleSource.

This crate does not read from the filesystem and does not provide the Node or LSP integration layer. Those stay in native consumer crates.