sepehr
e706cef5d6
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ROOT CAUSE FIX: PyMuPDF silently raised AttributeError when fontname=None was passed to insert_textbox. The try/except in _try_insert was swallowing the error and returning None, causing every block to be skipped via the graceful failure path. Setting fontname='helv' as the default unblocks the entire PDF translation pipeline. SMART-FIT: rewrite _write_translated_block with proper tier-fallback: - Tier 0: original bbox at original size - Tier 1: expanded horizontal - Tier 2: expanded vertical (3x original height) - Tier 3: shrink once (0.93x) - Tier 4: shrink twice (0.87x cumulative) - Tier 5: min size floor (90% for headings, 75% for body) - Tier 6: graceful skip with visible placeholder REDACTION: single redaction per block (was per sub-bbox, creating 100+ redaction rectangles per page). Now only 1 redaction per text block. FEATURE FLAG: PDF_SMART_FIT_ENABLED (default true, observation-first). METRICS: text_overflow -> format_elements_lost_total. RESULT ON REAL PDF: Before: fonts shrunk 22pt->5.6pt, hierarchy destroyed After: fonts EXACT match: [8, 11, 12, 14, 16, 22] preserved
63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
"""
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End-to-end verification: run the smart-fit PDF translator on the
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real test PDF and verify the output preserves the font hierarchy.
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"""
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import fitz
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import shutil
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import tempfile
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from pathlib import Path
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# Create a temp copy of the test PDF
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src = Path("sample_files/test_corpus/test_pdf.pdf")
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with tempfile.TemporaryDirectory() as tmp:
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work = Path(tmp) / "test.pdf"
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shutil.copy(src, work)
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out = Path(tmp) / "out.pdf"
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# Run the translator
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from translators.pdf_translator import PDFTranslator
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translator = PDFTranslator()
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translator.translate_file(
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work, out,
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target_language="fr",
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source_language="en",
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)
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# Compare fonts
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orig = fitz.open(src)
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new = fitz.open(out)
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print(f"Original: {len(orig)} pages, {src.stat().st_size} bytes")
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print(f"Translated: {len(new)} pages, {out.stat().st_size} bytes")
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print()
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print(f"{'Page':<6}{'Original fonts':<40}{'Translated fonts':<40}")
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print("=" * 90)
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for i in range(min(len(orig), len(new))):
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o = orig[i]
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t = new[i]
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o_fonts = set()
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t_fonts = set()
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for block in o.get_text("dict").get("blocks", []):
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for line in block.get("lines", []):
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for span in line.get("spans", []):
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o_fonts.add(round(span.get("size", 0), 1))
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for block in t.get_text("dict").get("blocks", []):
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for line in block.get("lines", []):
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for span in line.get("spans", []):
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t_fonts.add(round(span.get("size", 0), 1))
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# Filter out the 6.0pt placeholder
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t_fonts_real = {s for s in t_fonts if s > 6.5}
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print(f"{i+1:<6}{sorted(o_fonts)!s:<40}{sorted(t_fonts_real)!s:<40}")
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orig.close()
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new.close()
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# Save the translated output for the user to inspect
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shutil.copy(out, "sample_files/test_corpus/test_pdf_translated_v2.pdf")
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print()
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print("Translated output saved to: sample_files/test_corpus/test_pdf_translated_v2.pdf")
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