Add PageIndex Flash - #369
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| ) | ||
| from .parser_pdfium_parallel import parse_charlevel_meta_parallel | ||
| from .phases import assign_reading_order, PageView, process_page | ||
| PageView = PageView # re-export for type hints |
| """IEEE-754 division, no ZeroDivisionError (``0/0-> NaN, ``x/±0-> ±Inf with the usual sign rules).""" | ||
| if other_item != 0.0: | ||
| return value / other_item | ||
| if value == 0.0 or value != value: |
| num_val = float(operator_token) | ||
| except ValueError: | ||
| num_val = 0.0 | ||
| if num_val != num_val or num_val in (float("inf"), -float("inf")): |
| value = _parse_int(token_value.decode("latin-1"), 10) if token_value is not None else 0.0 | ||
| except OverflowError: | ||
| value = float("inf") # huge digit run | ||
| if value != value or value == float("inf") or value == -float("inf"): |
| if glyph_prefix == "G": # Gxx | ||
| if len(glyph_name) == 3: | ||
| parsed_integer = _parse_int(glyph_name[1:], 16) | ||
| code = int(parsed_integer) if parsed_integer == parsed_integer else 0 # pi==pi: not NaN |
| elif glyph_prefix == "g": # g00xx | ||
| if len(glyph_name) == 5: | ||
| parsed_integer = _parse_int(glyph_name[1:], 16) | ||
| code = int(parsed_integer) if parsed_integer == parsed_integer else 0 |
| code_str = glyph_name[1:] | ||
| if force_glyphs: | ||
| parsed_integer = _parse_int(code_str, 16) | ||
| code = int(parsed_integer) if parsed_integer == parsed_integer else 0 |
| # whole encoding as base-16. Non-integer numeric values pass | ||
| # through and then fail the integer gate below. | ||
| num = _to_number(code_str) | ||
| if num != num: # NaN |
| num = _to_number(code_str) | ||
| if num != num: # NaN | ||
| parsed_integer = _parse_int(code_str, 16) | ||
| if parsed_integer == parsed_integer: |
| # Empty lines carry an inverted-sentinel bbox. Preserve IEEE division | ||
| # edge cases so the later distance comparison simply does not merge. | ||
| diff = line_center_y - other_center_y | ||
| return float("nan") if diff != diff else float("inf") |
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Summary
Add PageIndex Flash, a heuristic TOC extraction engine that builds document structure from PDF layout statistics without an LLM.
The pipeline parses character-level layout via PDFium, clusters text into lines and blocks, then identifies headings from font style and numbering patterns to assemble a nested TOC tree. Optional LLM-based node summaries can be generated on top of the extracted structure.
Test plan
page_index_flash(pdf)returns correct tree structurepage_index_flash(pdf, summary=False)skips LLM calls