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d32967eda8
### What problem does this PR solve? let excel use lazy image loader ### Type of change - [x] Refactoring --------- Co-authored-by: Yingfeng <yingfeng.zhang@gmail.com>
185 lines
6.5 KiB
Python
185 lines
6.5 KiB
Python
#
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# Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from docx import Document
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import re
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import pandas as pd
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from collections import Counter
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from rag.nlp import rag_tokenizer
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from io import BytesIO
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import logging
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from docx.image.exceptions import (
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InvalidImageStreamError,
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UnexpectedEndOfFileError,
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UnrecognizedImageError,
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)
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from rag.utils.lazy_image import LazyImage
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class RAGFlowDocxParser:
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def get_picture(self, document, paragraph):
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imgs = paragraph._element.xpath(".//pic:pic")
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if not imgs:
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return None
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image_blobs = []
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for img in imgs:
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embed = img.xpath(".//a:blip/@r:embed")
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if not embed:
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continue
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embed = embed[0]
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image_blob = None
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try:
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related_part = document.part.related_parts[embed]
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except Exception as e:
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logging.warning(f"Skipping image due to unexpected error getting related_part: {e}")
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continue
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try:
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image = related_part.image
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if image is not None:
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image_blob = image.blob
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except (
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UnrecognizedImageError,
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UnexpectedEndOfFileError,
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InvalidImageStreamError,
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UnicodeDecodeError,
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) as e:
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logging.info(f"Damaged image encountered, attempting blob fallback: {e}")
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except Exception as e:
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logging.warning(f"Unexpected error getting image, attempting blob fallback: {e}")
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if image_blob is None:
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image_blob = getattr(related_part, "blob", None)
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if image_blob:
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image_blobs.append(image_blob)
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if not image_blobs:
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return None
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return LazyImage(image_blobs)
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def __extract_table_content(self, tb):
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df = []
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for row in tb.rows:
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df.append([c.text for c in row.cells])
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return self.__compose_table_content(pd.DataFrame(df))
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def __compose_table_content(self, df):
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def blockType(b):
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pattern = [
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("^(20|19)[0-9]{2}[年/-][0-9]{1,2}[月/-][0-9]{1,2}日*$", "Dt"),
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(r"^(20|19)[0-9]{2}年$", "Dt"),
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(r"^(20|19)[0-9]{2}[年/-][0-9]{1,2}月*$", "Dt"),
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("^[0-9]{1,2}[月/-][0-9]{1,2}日*$", "Dt"),
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(r"^第*[一二三四1-4]季度$", "Dt"),
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(r"^(20|19)[0-9]{2}年*[一二三四1-4]季度$", "Dt"),
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(r"^(20|19)[0-9]{2}[ABCDE]$", "DT"),
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("^[0-9.,+%/ -]+$", "Nu"),
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(r"^[0-9A-Z/\._~-]+$", "Ca"),
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(r"^[A-Z]*[a-z' -]+$", "En"),
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(r"^[0-9.,+-]+[0-9A-Za-z/$￥%<>（）()' -]+$", "NE"),
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(r"^.{1}$", "Sg")
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]
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for p, n in pattern:
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if re.search(p, b):
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return n
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tks = [t for t in rag_tokenizer.tokenize(b).split() if len(t) > 1]
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if len(tks) > 3:
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if len(tks) < 12:
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return "Tx"
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else:
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return "Lx"
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if len(tks) == 1 and rag_tokenizer.tag(tks[0]) == "nr":
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return "Nr"
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return "Ot"
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if len(df) < 2:
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return []
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max_type = Counter([blockType(str(df.iloc[i, j])) for i in range(
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1, len(df)) for j in range(len(df.iloc[i, :]))])
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max_type = max(max_type.items(), key=lambda x: x[1])[0]
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colnm = len(df.iloc[0, :])
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hdrows = [0] # header is not necessarily appear in the first line
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if max_type == "Nu":
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for r in range(1, len(df)):
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tys = Counter([blockType(str(df.iloc[r, j]))
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for j in range(len(df.iloc[r, :]))])
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tys = max(tys.items(), key=lambda x: x[1])[0]
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if tys != max_type:
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hdrows.append(r)
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lines = []
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for i in range(1, len(df)):
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if i in hdrows:
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continue
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hr = [r - i for r in hdrows]
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hr = [r for r in hr if r < 0]
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t = len(hr) - 1
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while t > 0:
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if hr[t] - hr[t - 1] > 1:
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hr = hr[t:]
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break
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t -= 1
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headers = []
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for j in range(len(df.iloc[i, :])):
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t = []
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for h in hr:
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x = str(df.iloc[i + h, j]).strip()
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if x in t:
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continue
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t.append(x)
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t = ",".join(t)
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if t:
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t += ": "
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headers.append(t)
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cells = []
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for j in range(len(df.iloc[i, :])):
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if not str(df.iloc[i, j]):
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continue
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cells.append(headers[j] + str(df.iloc[i, j]))
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lines.append(";".join(cells))
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if colnm > 3:
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return lines
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return ["\n".join(lines)]
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def __call__(self, fnm, from_page=0, to_page=100000000):
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self.doc = Document(fnm) if isinstance(
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fnm, str) else Document(BytesIO(fnm))
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pn = 0 # parsed page
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secs = [] # parsed contents
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for p in self.doc.paragraphs:
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if pn > to_page:
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break
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runs_within_single_paragraph = [] # save runs within the range of pages
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for run in p.runs:
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if pn > to_page:
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break
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if from_page <= pn < to_page and p.text.strip():
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runs_within_single_paragraph.append(run.text) # append run.text first
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# wrap page break checker into a static method
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if 'lastRenderedPageBreak' in run._element.xml:
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pn += 1
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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
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tbls = [self.__extract_table_content(tb) for tb in self.doc.tables]
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return secs, tbls
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