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# 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 io import BytesIO
from pptx import Presentation
from deepdoc.parser import tokenize, is_english
from rag.nlp import huqie
from deepdoc.parser import PdfParser
class Ppt(object):
def __init__(self):
super().__init__()
def __extract(self, shape):
if shape.shape_type == 19:
tb = shape.table
rows = []
for i in range(1, len(tb.rows)):
rows.append("; ".join([tb.cell(0, j).text + ": " + tb.cell(i, j).text for j in range(len(tb.columns)) if tb.cell(i, j)]))
return "\n".join(rows)
if shape.has_text_frame:
return shape.text_frame.text
if shape.shape_type == 6:
texts = []
for p in shape.shapes:
t = self.__extract(p)
if t: texts.append(t)
return "\n".join(texts)
def __call__(self, fnm, from_page, to_page, callback=None):
ppt = Presentation(fnm) if isinstance(
fnm, str) else Presentation(
BytesIO(fnm))
txts = []
self.total_page = len(ppt.slides)
for i, slide in enumerate(ppt.slides[from_page: to_page]):
texts = []
for shape in slide.shapes:
txt = self.__extract(shape)
if txt: texts.append(txt)
txts.append("\n".join(texts))
callback(0.5, "Text extraction finished.")
import aspose.slides as slides
import aspose.pydrawing as drawing
imgs = []
with slides.Presentation(BytesIO(fnm)) as presentation:
for i, slide in enumerate(presentation.slides[from_page: to_page]):
buffered = BytesIO()
slide.get_thumbnail(0.5, 0.5).save(buffered, drawing.imaging.ImageFormat.jpeg)
imgs.append(buffered.getvalue())
assert len(imgs) == len(txts), "Slides text and image do not match: {} vs. {}".format(len(imgs), len(txts))
callback(0.9, "Image extraction finished")
self.is_english = is_english(txts)
return [(txts[i], imgs[i]) for i in range(len(txts))]
class Pdf(PdfParser):
def __init__(self):
super().__init__()
def __garbage(self, txt):
txt = txt.lower().strip()
if re.match(r"[0-9\.,%/-]+$", txt): return True
if len(txt) < 3:return True
return False
def __call__(self, filename, binary=None, from_page=0, to_page=100000, zoomin=3, callback=None):
self.__images__(filename if not binary else binary, zoomin, from_page, to_page)
callback(0.8, "Page {}~{}: OCR finished".format(from_page, min(to_page, self.total_page)))
assert len(self.boxes) == len(self.page_images), "{} vs. {}".format(len(self.boxes), len(self.page_images))
res = []
#################### More precisely ###################
# self._layouts_rec(zoomin)
# self._text_merge()
# pages = {}
# for b in self.boxes:
# if self.__garbage(b["text"]):continue
# if b["page_number"] not in pages: pages[b["page_number"]] = []
# pages[b["page_number"]].append(b["text"])
# for i, lines in pages.items():
# res.append(("\n".join(lines), self.page_images[i-1]))
# return res
########################################
for i in range(len(self.boxes)):
lines = "\n".join([b["text"] for b in self.boxes[i] if not self.__garbage(b["text"])])
res.append((lines, self.page_images[i]))
callback(0.9, "Page {}~{}: Parsing finished".format(from_page, min(to_page, self.total_page)))
return res
def chunk(filename, binary=None, from_page=0, to_page=100000, callback=None, **kwargs):
"""
The supported file formats are pdf, pptx.
Every page will be treated as a chunk. And the thumbnail of every page will be stored.
PPT file will be parsed by using this method automatically, setting-up for every PPT file is not necessary.
"""
doc = {
"docnm_kwd": filename,
"title_tks": huqie.qie(re.sub(r"\.[a-zA-Z]+$", "", filename))
}
doc["title_sm_tks"] = huqie.qieqie(doc["title_tks"])
res = []
if re.search(r"\.pptx?$", filename, re.IGNORECASE):
ppt_parser = Ppt()
for txt,img in ppt_parser(filename if not binary else binary, from_page, 1000000, callback):
d = copy.deepcopy(doc)
d["image"] = img
tokenize(d, txt, ppt_parser.is_english)
res.append(d)
return res
elif re.search(r"\.pdf$", filename, re.IGNORECASE):
pdf_parser = Pdf()
for txt,img in pdf_parser(filename if not binary else binary, from_page=from_page, to_page=to_page, callback=callback):
d = copy.deepcopy(doc)
d["image"] = img
tokenize(d, txt, pdf_parser.is_english)
res.append(d)
return res
raise NotImplementedError("file type not supported yet(pptx, pdf supported)")
if __name__== "__main__":
import sys
def dummy(a, b):
pass
chunk(sys.argv[1], callback=dummy)
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