PDF parsing toolkit for DeepSeek Harness: pdf_info, pdf_extract_text, pdf_render_page with hybrid pdfjs/built-in engines and system-font rendering for non-embedded CJK PDFs.
Pending human review — the facts below come from the source repository.
PDF parsing toolkit for DeepSeek Harness: pdf_info, pdf_extract_text, pdf_render_page with hybrid pdfjs/built-in engines and system-font rendering for non-embedded CJK PDFs.
Users who want this capability in DSH; check the source and docs before installing.
dsh plugin --profile web add github:zhtx2024/dsh-pdf No supported platforms were declared.
pdf_info / pdf_extract_text / pdf_render_page) with hybrid engines, including system-font rendering for PDFs with non-embedded CJK fonts (e.g. EasyEDA / JLC EDA schematic exports). English | 中文 Tags: dsh-plugin · pdf · pdfjs · canvas · schematic · tools ## Install sh dsh plugin --profile web add github:zhtx2024/dsh-pdf Or from a local checkout during development: sh dsh plugin --profile web add link:<path-to-repo> Then restart DSH (or open a new session) — the three tools and an agent guidance block become available. ## Tools | Tool | What it does | |---|---| | pdf_info | Page count, page sizes (pt), document metadata, and the font list with per-font embedded flags. | | pdf_extract_text | Extracts text per page; optional page and withPosition (per-line x/y coordinates + font size). | | pdf_render_page | Renders one page to a PNG (local file) with configurable scale/outDir; engine auto-selection. | ## Why a custom renderer? pdfjs-dist cannot render text in PDFs whose fonts are not embedded and lack a ToUnicode map — the classic case is JLC EDA / EasyEDA schematic exports (SimSun/SimHei Type0 fonts with UniGB-UCS2-H encoding): pdfjs emits translateFont failed and drops the glyphs. dsh-pdf solves this with a two-engine design: - pdfjs engine — used when all fonts are embedded (standard PDFs). - sysfont engine — a built-in content-stream renderer that decodes the PDF text operators (BT/ET, Tf, Tm, Td, Tj, TJ) itself, maps UniGB-UCS2-H/UTF-16BE strings to Unicode, and draws them with system fonts (SimSun, SimHei, Microsoft YaHei, …) via @napi-rs/canvas. Text extraction uses the same auto-selection: embedded fonts → pdfjs text layer; non-embedded fonts → the built-in decoder (which correctly recovers CJK text pdfjs loses). ## Example text pdf_info("D:/Downloads/SCH_SA-V11A.pdf") → 3 pages, A3 landscape, jsPDF producer, 6 fonts (all non-embedded) pdf_extract_text("D:/Downloads/SCH_SA-V11A.pdf", { page: 1 }) → net names, pin numbers, and Chinese labels ("主控板", "嘉立创", …) pdf_render_page("D:/Downloads/SCH_SA-V11A.pdf", { page: 1, scale: 2 }) → D:/Downloads/SCH_SA-V11A-pages/page-1.png (2396×1698, engine: sysfont) ## Architecture - lib/index.js — cordis plugin entry (name, inject, apply); registers the three tools as native tool objects (plain JSON-Schema parameters and output — no @deepseek-ai/dsh-tools dependency needed) and injects the agent guidance block (systemPrompt.section, order 160). - lib/pdf-core.js — self-contained engine: PDF object parser, font scanner, pdfjs loading with fs-based CMapReaderFactory/StandardFontDataFactory (Node 24's global fetch doesn't speak file://), the built-in text extractor, and the sysfont renderer. - cordis.patch.yml — the dsh.bundle.patch insert row. ## Limitations - Scanned/image-only PDFs have no text layer — extraction returns nothing (rendering still works, as a plain image). - The sysfont renderer assumes Type0 CID codes equal Unicode code points (true for UniGB-UCS2-H exports); exotic CID fonts fall back to pdfjs. - Large PDFs are parsed fully into memory. ## License MITNot by stars — picked by hand, one at a time.
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