File size: 3,421 Bytes
37fb2b9 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: OpenMDW-1.1
"""Relocate only plain above-chart captions with geometric/preservation guards."""
import re
from bs4 import BeautifulSoup
BLOCK = re.compile(
r"(<x_([\d.]+)><y_([\d.]+)>)(.*?)(<x_([\d.]+)><y_([\d.]+)><class_([^>]+)>)", re.S
)
def plain(text):
text = text.replace("<tbc>", "").strip()
if any(marker in text for marker in ["**", "__", "~~", "`"]):
return None
if re.search(r"(?<!\w)_[^_\n]+_(?!\w)|<[/a-zA-Z!]|\\[A-Za-z&%_]|\]\(", text):
return None
return text if text and "\n" not in text else None
def relocate_above_captions(raw, markdown, render_base):
matches = list(BLOCK.finditer(raw))
eligible = {}
targets = {}
moved = set()
allowed = {"Chart"}
boxes = [tuple(map(float, [m[2], m[3], m[6], m[7]])) for m in matches]
for i, m in enumerate(matches):
if m[8] != "Caption" or plain(m[4]) is None:
continue
box = boxes[i]
candidates = []
for j in [i - 1, i + 1]:
if not 0 <= j < len(matches) or matches[j][8] not in allowed:
continue
other = boxes[j]
if box[3] > other[1]:
continue # Attach above-object captions only; retain notes below as standalone.
width = min(box[2] - box[0], other[2] - other[0])
overlap = max(0, min(box[2], other[2]) - max(box[0], other[0]))
gap = max(other[1] - box[3], box[1] - other[3])
if width > 0 and overlap / width >= 0.8 and 0 <= gap <= 0.03:
candidates.append((gap, j))
candidates.sort()
if not candidates or (
len(candidates) > 1 and abs(candidates[0][0] - candidates[1][0]) < 1e-9
):
continue
gap, j = candidates[0]
eligible.setdefault(j, []).append((gap, i))
for j, caps in eligible.items():
caps.sort()
if len(caps) > 1 and abs(caps[0][0] - caps[1][0]) < 1e-9:
continue
caption_index = caps[0][1]
label = plain(matches[caption_index][4])
m = matches[j]
body = m[4]
if len(re.findall(r"<chart\b", body)) != 1:
continue
title = re.search(r"(?m)^title:[ \t]*([^\n]*)", body)
if title:
if label not in title[1]:
body = (
body[: title.start()]
+ "title: "
+ title[1].strip()
+ " — "
+ label
+ body[title.end() :]
)
else:
body = re.sub(
r"(<chart\b[^>]*>)", lambda q: q[0] + "\ntitle: " + label, body, count=1
)
derived = m[1] + body + m[5]
rendered = render_base(derived)
# Do not move text unless it survives inside an actual table caption.
captions = BeautifulSoup(rendered, "html.parser").find_all("caption")
if not any(label in cap.get_text(" ", strip=True) for cap in captions):
continue
targets[m.start()] = derived
moved.add(matches[caption_index].start())
if not targets:
return markdown
derived = BLOCK.sub(
lambda m: "" if m.start() in moved else targets.get(m.start(), m[0]), raw
)
return render_base(derived)
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