48 lines
1.7 KiB
Markdown
48 lines
1.7 KiB
Markdown
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# ADR-0004 — PDF viewer library for the reference workspace
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- Status: proposed
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- Date: 2026-05-24
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- Workplan: CE-WP-0001-T07 (stub); validated in CE-WP-0002-T02
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## Context
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The PDF round-trip (select text → store selectors → reload → resolve →
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scroll → highlight) is the riskiest architectural assumption in the MVP
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(see `history/2026-05-24-initial-assessment.md`). The viewer library must:
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- Render PDF.js-backed pages in a React shell.
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- Expose stable APIs for programmatic text selection and highlight overlay.
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- Not leak its types into `src/shared/` or `src/engine/` (enforced by the
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T03 boundary lint rules).
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- Survive across versions of PDF.js without trapping us in old versions.
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CE-WP-0002-T02 is the spike that validates whichever library we pick. If
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the spike fails the success criteria, this ADR is the place to record the
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failure and propose an alternative.
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## Options
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- **A. `react-pdf-highlighter-plus`** *(current assumption)*
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- Pros: React-native, opinionated overlay layer, well-tested fixture
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coverage in the community.
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- Cons: bundles a particular PDF.js version; risk of needing to fork to
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get clean adapter boundaries.
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- **B. `react-pdf` (the official PDF.js React binding) + custom overlay**
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- Pros: thinnest abstraction; we own the overlay layer.
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- Cons: significantly more code to write and maintain for selection/
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highlight; reinventing PDF.js text-layer interaction.
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- **C. PDF.js directly (no React wrapper)**
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- Pros: maximum control.
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- Cons: highest implementation cost; harder to integrate into the React
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composition root.
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## Decision
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(blank — to be filled by the outcome of CE-WP-0002-T02.)
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## Consequences
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(blank)
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