Studio: replace preview switchboard with a renderer registry - #120
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The studio preview dispatched by an isImage/isText/isDocx boolean switchboard spread across the file utils, the page's data watchers, and the preview component — O(formats) to extend, and every renderer's heavy deps were statically reachable from the layer bundle. With the supported format list heading toward 25-30, replace it with a declarative registry. - renderers.ts: one StudioRenderer entry per format family — extensions, a lazy `() => import()` loader (so each renderer's deps stay code-split and load only when that format opens), its detection source, zoom support, and optional wrapper class. `rendererFor(ext)` is the single lookup. This is now the sole source of truth for "how is X previewed". - StudioDocumentPreview: the v-if switchboard becomes one `<component :is>` over the resolved renderer, wrapped in defineAsyncComponent whose onError surfaces a chunk-load failure through the existing error phase (no stuck spinner). Dropped the isImage/isText/isDocx props. - studio page: the text/docx content fetches arm off the registry's detectionSource, not hardcoded isText/isDocx — so a new text-backed format needs no page change. - file.ts: removed the orphaned preview classifiers (IMAGE/TEXT/DOCX_ EXTENSIONS + is*Extension/is*FileName); the upload allowlist stays. - Dropped the now-internal Studio*View barrel re-exports; localized the last hardcoded "unsupported" string (en/de). Adding a format is now one registry entry: no switchboard, page watcher, or bundle-graph edits, and the renderers stay SDK-free (lift-out-ready). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01JcYYAsbEf75Lke291j9AYU
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📝 WalkthroughWalkthroughThe studio preview now uses a renderer registry to resolve file formats, load preview components lazily, provide renderer-specific props, control detection watchers, and handle unsupported extensions. ChangesStudio preview registry
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🔵 Low · up to A delayed preview chunk failure could incorrectly put the newly selected file into an error state after the user switches formats. The impact is bounded to preview state and the change is otherwise mergeable with explicit owner awareness or a small follow-up guard. Sequence Diagram(s)sequenceDiagram
participant StudioPage
participant rendererFor
participant StudioDocumentPreview
participant LazyRenderer
StudioPage->>rendererFor: Resolve file extension
rendererFor-->>StudioPage: Return renderer and detection source
StudioDocumentPreview->>rendererFor: Resolve preview renderer
rendererFor-->>StudioDocumentPreview: Return renderer metadata
StudioDocumentPreview->>LazyRenderer: Load renderer with renderer-specific props
LazyRenderer-->>StudioDocumentPreview: Render preview or report chunk failure
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Full details: Docstring CoverageExplanation Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 3 files. (4 skipped: 4 unsupported.) ✨ Finishing Touches📝 Generate docstrings
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In `@packages/console/app/components/pages/studio/StudioDocumentPreview.vue`:
- Line 87: Update the defineAsyncComponent loader’s onError handling to set
viewPhase only when renderer.value still equals the loader’s active renderer,
preventing stale loader failures from affecting the current renderer.
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packages/console/app/components/pages/studio/StudioDocumentPreview.vuepackages/console/app/components/pages/studio/index.tspackages/console/app/components/pages/studio/renderers.tspackages/console/app/pages/w/[workspace]/studio/index.vuepackages/console/app/utils/file.tspackages/console/i18n/locales/de.jsonpackages/console/i18n/locales/en.json
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A defineAsyncComponent loader promise isn't cancelled when its component unmounts, so an old renderer's chunk can reject after a different file has opened — its onError would then clobber the new view's phase with a stale error. Guard the phase write with `renderer.value === active` so only the still-active renderer's load failure surfaces (fail() is still called either way). Addresses CodeRabbit review on #120. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01JcYYAsbEf75Lke291j9AYU
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studio-renderer-registry - app.nvisy.com PR #120
August 31, 2026 19:18 — with 
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Why
The studio preview picked its renderer with an
isImage/isText/isDocxboolean switchboard spread across three places — the file utils (is*Extensionpredicates +*_EXTENSIONSarrays), the page's two data-fetch watchers, and the preview component'sv-if/v-else-ifchain. That's O(formats) to extend, and every renderer's heavy deps (SuperDoc, and future PDF/XLSX engines) were statically reachable from the shared-layer bundle graph.With the supported-format list heading toward 25–30, this replaces the switchboard with a declarative registry — the single source of truth for how a file is previewed.
What
renderers.ts(new) — oneStudioRendererentry per format family:extensions, a lazy() => import()loader (so each renderer's deps stay code-split and load only when that format opens),detectionSource(text|docx-parts|none),supportsZoom, and an optionalwrapperClass.rendererFor(ext)is the one lookup everything uses.StudioDocumentPreview.vue— the booleanv-ifchain → one<component :is>over the resolved renderer, wrapped indefineAsyncComponentwhoseonErrorsurfaces a chunk-load failure through the existing error phase (no stuck spinner). Dropped theisImage/isText/isDocxprops; it resolves its own renderer fromfileExtension.detectionSource, not hardcodedisText/isDocx. A new text-backed format needs no page change.file.ts— removed the now-orphaned preview classifiers (IMAGE/TEXT/DOCX_EXTENSIONS+is*Extension/is*FileName); the upload allowlist (ACCEPTED_EXTENSIONS) stays — it's a separate concern.Studio*Viewbarrel re-exports; localized the last hardcoded "unsupported" string (en/de).On the async approach
Chose
defineAsyncComponent({ loader, onError })over<Suspense>deliberately: the host already owns the loading UI (the phase-driven overlay), so the only thing missing was turning a failed code-split fetch into anerrorphase.<Suspense>is experimental and would add a second, racing loader plus a coarseronErrorCapturederror path.Adding a format now
One registry entry — no switchboard, page watcher, or bundle-graph edits. Renderers stay SDK-free, keeping the whole surface lift-out-ready if the preview engine ever becomes its own package.
Checks
npm run typecheck→ 0npm run ci(biome + cargo fmt/clippy/machete/deny) → 0🤖 Generated with Claude Code
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