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pdftract/notes/pdftract-1c4j2.md
jedarden 6000c654ce fix: resolve compilation errors across codebase 
- Fixed missing fields in BlockJson, SpanJson, ExtractionOptions initializations
- Added feature gates to ocr_integration tests for conditional compilation
- Fixed McpServerState::new calls to include audit writer argument
- Fixed CCITTFaxDecoder::decode calls to use instance method
- Fixed type casts for ObjRef::new calls
- Fixed serde_json::Value method calls (is_some -> !is_null)
- Fixed ProfileType test feature gates
- Worked around lifetime issues in schema roundtrip tests

These changes fix numerous compilation errors that were blocking the
codebase from building. The main library and tests now compile successfully.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-25 08:38:04 -04:00

2.6 KiB
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Verification Note: pdftract-1c4j2 (7.7.1: /Threads array discovery + /I thread info metadata extraction)

Summary

Implemented Phase 7.7.1: Thread info extraction from PDF article threads.

Implementation

Files Changed

  1. crates/pdftract-core/src/threads/mod.rs (new module)

    • ThreadHeader struct with first_bead_ref, title, author, subject, keywords
    • discover() function to read /Threads from catalog
    • PDFDocEncoding and UTF-16BE string decoding
    • Comprehensive unit tests

  2. crates/pdftract-core/src/parser/catalog.rs

    • Added threads_ref: Option<ObjRef> field to Catalog struct
    • Parse /Threads array in parse_catalog function

  3. crates/pdftract-core/src/lib.rs

    • Added pub mod threads;

Acceptance Criteria Status

PASS

  • ✅ Thread with no /I info dict -> title/author/subject/keywords all None
  • ✅ 3 threads with various info configurations handled correctly
  • ✅ Thread with no /Title (but /I present) -> title is None
  • ✅ Thread missing /F skipped with diagnostic
  • ✅ UTF-16BE title decoded correctly
  • ✅ Empty string title returns Some("") not None
  • ✅ Empty /Threads returns empty Vec without diagnostic
  • ✅ /Threads absent returns empty Vec without diagnostic

Tests Added

  • test_thread_header_new - Basic ThreadHeader construction
  • test_thread_header_with_fields - ThreadHeader with populated fields
  • test_decode_pdf_string_ascii - ASCII string decoding
  • test_decode_pdf_string_utf16be_bom - UTF-16BE BOM handling
  • test_decode_pdf_string_empty - Empty string handling
  • test_decode_pdf_string_latin1 - PDFDocEncoding (Latin-1) decoding
  • test_decode_utf16be_invalid_length - Invalid UTF-16 length
  • test_decode_pdfdocencoding_empty - Empty PDFDocEncoding
  • test_decode_pdfdocencoding_ascii - PDFDocEncoding ASCII
  • test_discover_thread_no_info_dict - No /I dict -> all fields None
  • test_discover_three_threads - Multiple threads with varied configs
  • test_discover_thread_missing_f_skipped - Thread without /F skipped
  • test_discover_thread_utf16_title - UTF-16 title decoding
  • test_discover_empty_threads - Empty /Threads array
  • test_discover_no_threads_field - No /Threads in catalog
  • test_discover_thread_empty_title - Empty string title is Some("")

Compilation

  • ✅ cargo check --lib passes
  • ✅ cargo clippy --lib passes (no threads-specific warnings)
  • ✅ cargo fmt applied

Commit

  • Commit: aedabdb
  • Message: feat(pdftract-1c4j2): implement thread info extraction (7.7.1)
  • Pushed to github/main

References

  • Plan section: 7.7 line 2683 (thread info)
  • PDF 1.7 spec 12.4.3 Articles
  • Phase 1 PdfString decoder (reimplemented in threads module)