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#
# Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from docx import Document
import re
import pandas as pd
from collections import Counter
from rag.nlp import rag_tokenizer
from io import BytesIO
class RAGFlowDocxParser:
def __extract_table_content(self, tb):
df = []
for row in tb.rows:
df.append([c.text for c in row.cells])
return self.__compose_table_content(pd.DataFrame(df))
def __compose_table_content(self, df):
def blockType(b):
patt = [
("^(20|19)[0-9]{2}[年/-][0-9]{1,2}[月/-][0-9]{1,2}日*$", "Dt"),
(r"^(20|19)[0-9]{2}年$", "Dt"),
(r"^(20|19)[0-9]{2}[年/-][0-9]{1,2}月*$", "Dt"),
("^[0-9]{1,2}[月/-][0-9]{1,2}日*$", "Dt"),
(r"^第*[一二三四1-4]季度$", "Dt"),
(r"^(20|19)[0-9]{2}年*[一二三四1-4]季度$", "Dt"),
(r"^(20|19)[0-9]{2}[ABCDE]$", "DT"),
("^[0-9.,+%/ -]+$", "Nu"),
(r"^[0-9A-Z/\._~-]+$", "Ca"),
(r"^[A-Z]*[a-z' -]+$", "En"),
(r"^[0-9.,+-]+[0-9A-Za-z/$￥%<>（）()' -]+$", "NE"),
(r"^.{1}$", "Sg")
]
for p, n in patt:
if re.search(p, b):
return n
tks = [t for t in rag_tokenizer.tokenize(b).split() if len(t) > 1]
if len(tks) > 3:
if len(tks) < 12:
return "Tx"
else:
return "Lx"
if len(tks) == 1 and rag_tokenizer.tag(tks[0]) == "nr":
return "Nr"
return "Ot"
if len(df) < 2:
return []
max_type = Counter([blockType(str(df.iloc[i, j])) for i in range(
1, len(df)) for j in range(len(df.iloc[i, :]))])
max_type = max(max_type.items(), key=lambda x: x[1])[0]
colnm = len(df.iloc[0, :])
hdrows = [0] # header is not nessesarily appear in the first line
if max_type == "Nu":
for r in range(1, len(df)):
tys = Counter([blockType(str(df.iloc[r, j]))
for j in range(len(df.iloc[r, :]))])
tys = max(tys.items(), key=lambda x: x[1])[0]
if tys != max_type:
hdrows.append(r)
lines = []
for i in range(1, len(df)):
if i in hdrows:
continue
hr = [r - i for r in hdrows]
hr = [r for r in hr if r < 0]
t = len(hr) - 1
while t > 0:
if hr[t] - hr[t - 1] > 1:
hr = hr[t:]
break
t -= 1
headers = []
for j in range(len(df.iloc[i, :])):
t = []
for h in hr:
x = str(df.iloc[i + h, j]).strip()
if x in t:
continue
t.append(x)
t = ",".join(t)
if t:
t += ": "
headers.append(t)
cells = []
for j in range(len(df.iloc[i, :])):
if not str(df.iloc[i, j]):
continue
cells.append(headers[j] + str(df.iloc[i, j]))
lines.append(";".join(cells))
if colnm > 3:
return lines
return ["\n".join(lines)]
def __call__(self, fnm, from_page=0, to_page=100000000):
self.doc = Document(fnm) if isinstance(
fnm, str) else Document(BytesIO(fnm))
pn = 0 # parsed page
secs = [] # parsed contents
for p in self.doc.paragraphs:
if pn > to_page:
break
runs_within_single_paragraph = [] # save runs within the range of pages
for run in p.runs:
if pn > to_page:
break
if from_page <= pn < to_page and p.text.strip():
runs_within_single_paragraph.append(run.text) # append run.text first
# wrap page break checker into a static method
if 'lastRenderedPageBreak' in run._element.xml:
pn += 1
secs.append(("".join(runs_within_single_paragraph), p.style.name if hasattr(p.style, 'name') else '')) # then concat run.text as part of the paragraph
tbls = [self.__extract_table_content(tb) for tb in self.doc.tables]
return secs, tbls
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