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feat: escape underscores that are within latex equations #137

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merged 4 commits into from
Jan 29, 2025
Merged

feat: escape underscores that are within latex equations #137

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a895bf6
Add regex to escape underscores within latex equations
rateixei Jan 29, 2025
1f98663
Remove debug
rateixei Jan 29, 2025
e4405f7
Handle block equations
rateixei Jan 29, 2025
a483d26
Add double $ to standalone equations outputs
rateixei Jan 29, 2025
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10 changes: 9 additions & 1 deletion docling_core/types/doc/document.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2160,6 +2160,10 @@ def export_to_markdown( # noqa: C901
text = f"{list_indent}{marker} {item.text}"
mdtexts.append(text)

elif isinstance(item, TextItem) and item.label in [DocItemLabel.FORMULA]:
in_list = False
mdtexts.append(f"$${item.text}$$")

elif isinstance(item, TextItem) and item.label in labels:
in_list = False
if len(item.text) and text_width > 0:
Expand Down Expand Up @@ -2208,10 +2212,14 @@ def escape_underscores(text):
"""Escape underscores but leave them intact in the URL.."""
# Firstly, identify all the URL patterns.
url_pattern = r"!\[.*?\]\((.*?)\)"
# Matches both inline ($...$) and block ($$...$$) LaTeX equations:
latex_pattern = r"\$\$?(?:\\.|[^$\\])*\$\$?"
combined_pattern = f"({url_pattern})|({latex_pattern})"

parts = []
last_end = 0

for match in re.finditer(url_pattern, text):
for match in re.finditer(combined_pattern, text):
# Text to add before the URL (needs to be escaped)
before_url = text[last_end : match.start()]
parts.append(re.sub(r"(?<!\\)_", r"\_", before_url))
Expand Down