unsloth/studio
Daniel Han 62e9644266
Studio RAG: fix RTL/Indic PDF corruption and dropped DOCX tables (#6780)
* Studio RAG: fix RTL/Indic PDF corruption and dropped DOCX tables

The RAG parser prefers pymupdf4llm.to_markdown for PDFs, but that rebuilds text from
positioned glyphs and mangles complex-shaping scripts (RTL Arabic/Hebrew come back as
shaped Presentation Forms, Indic matras drop to U+FFFD) and can silently drop most of a
heavy-RTL page. _pdf now compares the Markdown against PyMuPDF's logical-order
get_text() per page and falls back to it when the Markdown looks corrupted (shaped
Presentation Forms or U+FFFD above a small floor/ratio) or holds far fewer letters than
the raw layer. Latin PDFs are unaffected and keep their Markdown tables/headings.

_docx walked document.paragraphs, which excludes table cells, so DOCX tables were
dropped entirely. It now walks body content in document order via iter_inner_content,
emitting each table row as pipe-joined cells (deduped across merged cells); the preview
locator already anchors on pipes.

Adds parser tests for the corruption and incompleteness fallbacks and for DOCX table
extraction. These mirror the chat document-extractor guard raised in the unslothai/
unsloth#5351 review; the RAG parser is a separate module and needed its own fix.

* RAG DOCX: keep empty table cells and collapse in-cell newlines

Skipping empty cells shifted later cells left and broke column alignment across rows;
a cell with internal paragraphs (newlines) also broke the pipe-joined row. Keep every
cell (dropping the row only when all are empty) and normalize each cell with
" ".join(split()) so multi-paragraph cells stay on one row. Adds a test for both.

* RAG DOCX: dedup merged table cells on the <w:tc> element directly

Store the shared <w:tc> lxml element in the seen set instead of its id(); it is
hashable and compares by the underlying node, so it dedups spanned/merged cells the
same way without relying on id(). Adds a merged-cell test.

* RAG DOCX: align merged cells, pad skipped grid columns, flatten nested tables

* RAG DOCX: walk cells in document order so nested tables keep in-cell position

* RAG DOCX: dedup vertically merged cells so a spanning label is indexed once

---------

Co-authored-by: danielhanchen <michaelhan2050@gmail.com>
Co-authored-by: Lee Jackson <130007945+Imagineer99@users.noreply.github.com>
2026-07-02 11:38:48 +01:00
..
backend Studio RAG: fix RTL/Indic PDF corruption and dropped DOCX tables (#6780) 2026-07-02 11:38:48 +01:00
frontend Add a fits-on-device filter to the model selects (#6802) 2026-07-02 02:18:20 -07:00
src-tauri Speed up Studio desktop startup (#6742) 2026-06-29 15:27:39 +02:00
__init__.py Final cleanup 2026-03-12 18:28:04 +00:00
install_llama_prebuilt.py Studio: stop handing CI/user secrets to downloaded llama.cpp binaries (#6696) 2026-06-27 05:21:05 -07:00
install_node_prebuilt.py Pin isolated Node.js installer to committed sha256 digests (#6625) 2026-06-24 05:47:58 -07:00
install_python_stack.py Make _uv_safe_path space-safe on macOS/Linux (#6503) (#6534) 2026-06-24 04:02:24 -07:00
LICENSE.AGPL-3.0 Add AGPL-3.0 license to studio folder 2026-03-09 19:36:25 +00:00
node_prebuilt_pins.json Pin isolated Node.js installer to committed sha256 digests (#6625) 2026-06-24 05:47:58 -07:00
package-lock.json ci: advisory lockfile supply-chain audit (no install-script changes) (#5604) 2026-05-19 05:56:56 -07:00
package.json ci: advisory lockfile supply-chain audit (no install-script changes) (#5604) 2026-05-19 05:56:56 -07:00
setup.bat Final cleanup 2026-03-12 18:28:04 +00:00
setup.ps1 Studio: UNSLOTH_NPM_REGISTRY opt-in for corporate npm mirrors (#6491) (#6663) 2026-06-25 04:01:43 -07:00
setup.sh Studio: UNSLOTH_NPM_REGISTRY opt-in for corporate npm mirrors (#6491) (#6663) 2026-06-25 04:01:43 -07:00
Unsloth_Studio_Colab.ipynb Studio Colab: opt-in shareable Cloudflare tunnel link (#6684) 2026-06-26 00:56:23 -07:00