Document Viewer: Plugin Reference

One-page summary of every EmbedPDF plugin used by DocumentViewer, organized by purpose.

DocumentViewer is built on EmbedPDF’s plugin architecture. Each plugin handles one concern (zoom, search, annotations, etc.) and is registered only when its corresponding features flag is on. This page lists every plugin in scope and links to its reference.

Always-on (no feature flag)

These five plugins constitute the minimum PDF rendering pipeline. They’re always registered:

document-manager — orchestrates document lifecycle (load, switch, unload)
viewport — owns the scrollable container DOM
scroll — page-aware virtual scrolling
render — paints pages to canvas
tiling — splits large pages into tiles for memory efficiency

View controls

Toggle viewport behaviour and orientation. Each opt-in via a features flag:

zoom — features.zoom
rotate — features.rotate
spread — features.spread
pan — features.pan
fullscreen — features.fullscreen

Interaction

interaction-manager — auto-enabled by pan, selection, or annotations
selection — features.selection (also auto-enabled by annotations)

search — features.search
bookmark — features.outline
thumbnail — features.thumbnails

Output

export — features.print, features.download; powers saveAsCopy()

Editing (Phase 1)

hotkeys — features.keyboardShortcuts
annotation — features.annotations
history — features.undoRedo

Phase 2 plugins (forthcoming)

These plugin pages will land when their feature flags ship in Phase 2:

stamp, signature, redaction, form, attachment

Plugin registration pattern

Internally, pluginRegistry.ts is a pure function from ViewerFeatures → PluginRegistration[]. The order matters because some plugins depend on others (e.g. annotation needs interaction-manager). The registry handles dependency ordering automatically; you don’t need to think about it when toggling features.

import { resolveFeatures, DEFAULT_FEATURES } from '@meldui/vue'

const merged = resolveFeatures(DEFAULT_FEATURES, userFeatures)
// merged is the effective ViewerFeatures with auto-enabled dependencies