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feat: integrate Tesseract.js with improved language availability and font handling

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- Refactored OCR page recognition to utilize a configured Tesseract worker.
- Added functions to manage font URLs and asset filenames based on language.
- Implemented language availability checks and error handling for unsupported languages.
- Enhanced PDF workflow to display available OCR languages and handle user selections.
- Introduced utility functions for resolving Tesseract asset configurations.
- Added tests for OCR functionality, font loading, and Tesseract runtime behavior.
- Updated global types to include environment variables for Tesseract and font configurations.
This commit is contained in:
alam00000
2026-03-14 15:50:30 +05:30
parent 58c78b09d2
commit 77da6d7a7d
23 changed files with 1906 additions and 564 deletions
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@@ -35,6 +35,18 @@ ENV VITE_WASM_PYMUPDF_URL=$VITE_WASM_PYMUPDF_URL
ENV VITE_WASM_GS_URL=$VITE_WASM_GS_URL
ENV VITE_WASM_CPDF_URL=$VITE_WASM_CPDF_URL
# OCR asset URLs (optional, used for self-hosted or air-gapped OCR)
ARG VITE_TESSERACT_WORKER_URL
ARG VITE_TESSERACT_CORE_URL
ARG VITE_TESSERACT_LANG_URL
ARG VITE_TESSERACT_AVAILABLE_LANGUAGES
ARG VITE_OCR_FONT_BASE_URL
ENV VITE_TESSERACT_WORKER_URL=$VITE_TESSERACT_WORKER_URL
ENV VITE_TESSERACT_CORE_URL=$VITE_TESSERACT_CORE_URL
ENV VITE_TESSERACT_LANG_URL=$VITE_TESSERACT_LANG_URL
ENV VITE_TESSERACT_AVAILABLE_LANGUAGES=$VITE_TESSERACT_AVAILABLE_LANGUAGES
ENV VITE_OCR_FONT_BASE_URL=$VITE_OCR_FONT_BASE_URL
# Default UI language (e.g. en, fr, de, es, zh, ar)
ARG VITE_DEFAULT_LANGUAGE
ENV VITE_DEFAULT_LANGUAGE=$VITE_DEFAULT_LANGUAGE