#
# Copyright 2024 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.
#
import copy
import re
from api.db import ParserType
from io import BytesIO
from rag.nlp import rag_tokenizer, tokenize, tokenize_table, add_positions, bullets_category, title_frequency, tokenize_chunks, docx_question_level
from deepdoc.parser import PdfParser, PlainParser
from rag.utils import num_tokens_from_string
from deepdoc.parser import PdfParser, ExcelParser, DocxParser
from docx import Document
from PIL import Image
class Pdf(PdfParser):
def __init__(self):
self.model_speciess = ParserType.MANUAL.value
super().__init__()
def __call__(self, filename, binary=None, from_page=0,
to_page=100000, zoomin=3, callback=None):
from timeit import default_timer as timer
start = timer()
callback(msg="OCR is running...")
self.__images__(
filename if not binary else binary,
zoomin,
from_page,
to_page,
callback
)
callback(msg="OCR finished.")
# for bb in self.boxes:
# for b in bb:
# print(b)
print("OCR:", timer() - start)
self._layouts_rec(zoomin)
callback(0.65, "Layout analysis finished.")
print("layouts:", timer() - start)
self._table_transformer_job(zoomin)
callback(0.67, "Table analysis finished.")
self._text_merge()
tbls = self._extract_table_figure(True, zoomin, True, True)
self._concat_downward()
self._filter_forpages()
callback(0.68, "Text merging finished")
# clean mess
for b in self.boxes:
b["text"] = re.sub(r"([\t ]|\u3000){2,}", " ", b["text"].strip())
return [(b["text"], b.get("layout_no", ""), self.get_position(b, zoomin))
for i, b in enumerate(self.boxes)], tbls
class Docx(DocxParser):
def __init__(self):
pass
def get_picture(self, document, paragraph):
img = paragraph._element.xpath('.//pic:pic')
if not img:
return None
img = img[0]
embed = img.xpath('.//a:blip/@r:embed')[0]
related_part = document.part.related_parts[embed]
image = related_part.image
image = Image.open(BytesIO(image.blob))
return image
def concat_img(self, img1, img2):
if img1 and not img2:
return img1
if not img1 and img2:
return img2
if not img1 and not img2:
return None
width1, height1 = img1.size
width2, height2 = img2.size
new_width = max(width1, width2)
new_height = height1 + height2
new_image = Image.new('RGB', (new_width, new_height))
new_image.paste(img1, (0, 0))
new_image.paste(img2, (0, height1))
return new_image
def __call__(self, filename, binary=None, from_page=0, to_page=100000, callback=None):
self.doc = Document(
filename) if not binary else Document(BytesIO(binary))
pn = 0
last_answer, last_image = "", None
question_stack, level_stack = [], []
ti_list = []
for p in self.doc.paragraphs:
if pn > to_page:
break
question_level, p_text = 0, ''
if from_page <= pn < to_page and p.text.strip():
question_level, p_text = docx_question_level(p)
if not question_level or question_level > 6: # not a question
last_answer = f'{last_answer}\n{p_text}'
current_image = self.get_picture(self.doc, p)
last_image = self.concat_img(last_image, current_image)
else: # is a question
if last_answer or last_image:
sum_question = '\n'.join(question_stack)
if sum_question:
ti_list.append((f'{sum_question}\n{last_answer}', last_image))
last_answer, last_image = '', None
i = question_level
while question_stack and i <= level_stack[-1]:
question_stack.pop()
level_stack.pop()
question_stack.append(p_text)
level_stack.append(question_level)
for run in p.runs:
if 'lastRenderedPageBreak' in run._element.xml:
pn += 1
continue
if 'w:br' in run._element.xml and 'type="page"' in run._element.xml:
pn += 1
if last_answer:
sum_question = '\n'.join(question_stack)
if sum_question:
ti_list.append((f'{sum_question}\n{last_answer}', last_image))
tbls = []
for tb in self.doc.tables:
html= "<table>"
for r in tb.rows:
html += "<tr>"
i = 0
while i < len(r.cells):
span = 1
c = r.cells[i]
for j in range(i+1, len(r.cells)):
if c.text == r.cells[j].text:
span += 1
i = j
i += 1
html += f"<td>{c.text}</td>" if span == 1 else f"<td colspan='{span}'>{c.text}</td>"
html += "</tr>"
html += "</table>"
tbls.append(((None, html), ""))
return ti_list, tbls
def chunk(filename, binary=None, from_page=0, to_page=100000,
lang="Chinese", callback=None, **kwargs):
"""
Only pdf is supported.
"""
pdf_parser = None
doc = {
"docnm_kwd": filename
}
doc["title_tks"] = rag_tokenizer.tokenize(re.sub(r"\.[a-zA-Z]+$", "", doc["docnm_kwd"]))
doc["title_sm_tks"] = rag_tokenizer.fine_grained_tokenize(doc["title_tks"])
# is it English
eng = lang.lower() == "english" # pdf_parser.is_english
if re.search(r"\.pdf$", filename, re.IGNORECASE):
pdf_parser = Pdf() if kwargs.get(
"parser_config", {}).get(
"layout_recognize", True) else PlainParser()
sections, tbls = pdf_parser(filename if not binary else binary,
from_page=from_page, to_page=to_page, callback=callback)
if sections and len(sections[0]) < 3:
sections = [(t, l, [[0] * 5]) for t, l in sections]
# set pivot using the most frequent type of title,
# then merge between 2 pivot
if len(sections) > 0 and len(pdf_parser.outlines) / len(sections) > 0.1:
max_lvl = max([lvl for _, lvl in pdf_parser.outlines])
most_level = max(0, max_lvl - 1)
levels = []
for txt, _, _ in sections:
for t, lvl in pdf_parser.outlines:
tks = set([t[i] + t[i + 1] for i in range(len(t) - 1)])
tks_ = set([txt[i] + txt[i + 1]
for i in range(min(len(t), len(txt) - 1))])
if len(set(tks & tks_)) / max([len(tks), len(tks_), 1]) > 0.8:
levels.append(lvl)
break
else:
levels.append(max_lvl + 1)
else:
bull = bullets_category([txt for txt, _, _ in sections])
most_level, levels = title_frequency(
bull, [(txt, l) for txt, l, poss in sections])
assert len(sections) == len(levels)
sec_ids = []
sid = 0
for i, lvl in enumerate(levels):
if lvl <= most_level and i > 0 and lvl != levels[i - 1]:
sid += 1
sec_ids.append(sid)
# print(lvl, self.boxes[i]["text"], most_level, sid)
sections = [(txt, sec_ids[i], poss)
for i, (txt, _, poss) in enumerate(sections)]
for (img, rows), poss in tbls:
if not rows: continue
sections.append((rows if isinstance(rows, str) else rows[0], -1,
[(p[0] + 1 - from_page, p[1], p[2], p[3], p[4]) for p in poss]))
def tag(pn, left, right, top, bottom):
if pn + left + right + top + bottom == 0:
return ""
return "@@{}\t{:.1f}\t{:.1f}\t{:.1f}\t{:.1f}##" \
.format(pn, left, right, top, bottom)
chunks = []
last_sid = -2
tk_cnt = 0
for txt, sec_id, poss in sorted(sections, key=lambda x: (
x[-1][0][0], x[-1][0][3], x[-1][0][1])):
poss = "\t".join([tag(*pos) for pos in poss])
if tk_cnt < 32 or (tk_cnt < 1024 and (sec_id == last_sid or sec_id == -1)):
if chunks:
chunks[-1] += "\n" + txt + poss
tk_cnt += num_tokens_from_string(txt)
continue
chunks.append(txt + poss)
tk_cnt = num_tokens_from_string(txt)
if sec_id > -1:
last_sid = sec_id
res = tokenize_table(tbls, doc, eng)
res.extend(tokenize_chunks(chunks, doc, eng, pdf_parser))
return res
if re.search(r"\.docx$", filename, re.IGNORECASE):
docx_parser = Docx()
ti_list, tbls = docx_parser(filename, binary,
from_page=0, to_page=10000, callback=callback)
res = tokenize_table(tbls, doc, eng)
for text, image in ti_list:
d = copy.deepcopy(doc)
d['image'] = image
tokenize(d, text, eng)
res.append(d)
return res
else:
raise NotImplementedError("file type not supported yet(pdf and docx supported)")
if __name__ == "__main__":
import sys
def dummy(prog=None, msg=""):
pass
chunk(sys.argv[1], callback=dummy)