Plugin: Document Manager

Orchestrates document lifecycle — load, switch, and unload PDFs.

The DocumentManager plugin owns the active document. It handles loading a fresh PDF, swapping to a new one when source changes, and unloading on unmount.

Enabling flag

Always registered — required for any PDF rendering. No features flag needed.

What it does

Wraps the PDFium engine’s document handle for use by other plugins
Fires the loaded event once the PDF is parsed and ready for rendering
Exposes the loaded document via useDocumentState() composable from @embedpdf/core/vue
Coordinates document switching when source prop changes

Composable

useDocumentState() from @embedpdf/core/vue returns reactive state including:

{
  document: { pageCount, title, metadata } | null,
  loading: boolean,
  error: string | null,
}

Events

loaded — first successful document load (surfaces as @document-loaded on DocumentViewer)
error — load failure (surfaces as @document-error)

Dependencies

None — this is the foundation.

Configuration

No featureConfig block — DocumentManager has no user-tunable options.

When you’d touch it directly

You shouldn’t need to. DocumentViewer exposes getDocumentInfo() and the document-loaded event for all consumer needs.