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from loguru import logger
from magic_pdf.libs.MakeContentConfig import DropMode, MakeMode
from magic_pdf.libs.commons import join_path
from magic_pdf.libs.language import detect_lang
from magic_pdf.libs.markdown_utils import ocr_escape_special_markdown_char
from magic_pdf.libs.ocr_content_type import ContentType, BlockType
import wordninja
import re
def split_long_words(text):
segments = text.split(' ')
for i in range(len(segments)):
words = re.findall(r'\w+|[^\w]', segments[i], re.UNICODE)
for j in range(len(words)):
if len(words[j]) > 15:
words[j] = ' '.join(wordninja.split(words[j]))
segments[i] = ''.join(words)
return ' '.join(segments)
def ocr_mk_mm_markdown_with_para(pdf_info_list: list, img_buket_path):
markdown = []
for page_info in pdf_info_list:
paras_of_layout = page_info.get("para_blocks")
page_markdown = ocr_mk_markdown_with_para_core_v2(paras_of_layout, "mm", img_buket_path)
markdown.extend(page_markdown)
return '\n\n'.join(markdown)
def ocr_mk_nlp_markdown_with_para(pdf_info_dict: list):
markdown = []
for page_info in pdf_info_dict:
paras_of_layout = page_info.get("para_blocks")
page_markdown = ocr_mk_markdown_with_para_core_v2(paras_of_layout, "nlp")
markdown.extend(page_markdown)
return '\n\n'.join(markdown)
def ocr_mk_mm_markdown_with_para_and_pagination(pdf_info_dict: list, img_buket_path):
markdown_with_para_and_pagination = []
page_no = 0
for page_info in pdf_info_dict:
paras_of_layout = page_info.get("para_blocks")
if not paras_of_layout:
continue
page_markdown = ocr_mk_markdown_with_para_core_v2(paras_of_layout, "mm", img_buket_path)
markdown_with_para_and_pagination.append({
'page_no': page_no,
'md_content': '\n\n'.join(page_markdown)
})
page_no += 1
return markdown_with_para_and_pagination
def ocr_mk_markdown_with_para_core(paras_of_layout, mode, img_buket_path=""):
page_markdown = []
for paras in paras_of_layout:
for para in paras:
para_text = ''
for line in para:
for span in line['spans']:
span_type = span.get('type')
content = ''
language = ''
if span_type == ContentType.Text:
content = span['content']
language = detect_lang(content)
if language == 'en': # 只对英文长词进行分词处理，中文分词会丢失文本
content = ocr_escape_special_markdown_char(split_long_words(content))
else:
content = ocr_escape_special_markdown_char(content)
elif span_type == ContentType.InlineEquation:
content = f"${span['content']}$"
elif span_type == ContentType.InterlineEquation:
content = f"\n$$\n{span['content']}\n$$\n"
elif span_type in [ContentType.Image, ContentType.Table]:
if mode == 'mm':
content = f"\n})\n"
elif mode == 'nlp':
pass
if content != '':
if language == 'en': # 英文语境下 content间需要空格分隔
para_text += content + ' '
else: # 中文语境下，content间不需要空格分隔
para_text += content
if para_text.strip() == '':
continue
else:
page_markdown.append(para_text.strip() + ' ')
return page_markdown
def ocr_mk_markdown_with_para_core_v2(paras_of_layout, mode, img_buket_path=""):
page_markdown = []
for para_block in paras_of_layout:
para_text = ''
para_type = para_block['type']
if para_type == BlockType.Text:
para_text = merge_para_with_text(para_block)
elif para_type == BlockType.Title:
para_text = f"# {merge_para_with_text(para_block)}"
elif para_type == BlockType.InterlineEquation:
para_text = merge_para_with_text(para_block)
elif para_type == BlockType.Image:
if mode == 'nlp':
continue
elif mode == 'mm':
for block in para_block['blocks']: # 1st.拼image_body
if block['type'] == BlockType.ImageBody:
for line in block['lines']:
for span in line['spans']:
if span['type'] == ContentType.Image:
para_text += f"\n}) \n"
for block in para_block['blocks']: # 2nd.拼image_caption
if block['type'] == BlockType.ImageCaption:
para_text += merge_para_with_text(block)
elif para_type == BlockType.Table:
if mode == 'nlp':
continue
elif mode == 'mm':
for block in para_block['blocks']: # 1st.拼table_caption
if block['type'] == BlockType.TableCaption:
para_text += merge_para_with_text(block)
for block in para_block['blocks']: # 2nd.拼table_body
if block['type'] == BlockType.TableBody:
for line in block['lines']:
for span in line['spans']:
if span['type'] == ContentType.Table:
para_text += f"\n}) \n"
for block in para_block['blocks']: # 3rd.拼table_footnote
if block['type'] == BlockType.TableFootnote:
para_text += merge_para_with_text(block)
if para_text.strip() == '':
continue
else:
page_markdown.append(para_text.strip() + ' ')
return page_markdown
def merge_para_with_text(para_block):
para_text = ''
for line in para_block['lines']:
line_text = ""
line_lang = ""
for span in line['spans']:
span_type = span['type']
if span_type == ContentType.Text:
line_text += span['content'].strip()
if line_text != "":
line_lang = detect_lang(line_text)
for span in line['spans']:
span_type = span['type']
content = ''
if span_type == ContentType.Text:
content = span['content']
language = detect_lang(content)
if language == 'en': # 只对英文长词进行分词处理，中文分词会丢失文本
content = ocr_escape_special_markdown_char(split_long_words(content))
else:
content = ocr_escape_special_markdown_char(content)
elif span_type == ContentType.InlineEquation:
content = f"${span['content']}$"
elif span_type == ContentType.InterlineEquation:
content = f"\n$$\n{span['content']}\n$$\n"
if content != '':
if 'zh' in line_lang: # 遇到一些一个字一个span的文档，这种单字语言判断不准，需要用整行文本判断
para_text += content # 中文语境下，content间不需要空格分隔
else:
para_text += content + ' ' # 英文语境下 content间需要空格分隔
return para_text
def para_to_standard_format(para, img_buket_path):
para_content = {}
if len(para) == 1:
para_content = line_to_standard_format(para[0], img_buket_path)
elif len(para) > 1:
para_text = ''
inline_equation_num = 0
for line in para:
for span in line['spans']:
language = ''
span_type = span.get('type')
content = ""
if span_type == ContentType.Text:
content = span['content']
language = detect_lang(content)
if language == 'en': # 只对英文长词进行分词处理，中文分词会丢失文本
content = ocr_escape_special_markdown_char(split_long_words(content))
else:
content = ocr_escape_special_markdown_char(content)
elif span_type == ContentType.InlineEquation:
content = f"${span['content']}$"
inline_equation_num += 1
if language == 'en': # 英文语境下 content间需要空格分隔
para_text += content + ' '
else: # 中文语境下，content间不需要空格分隔
para_text += content
para_content = {
'type': 'text',
'text': para_text,
'inline_equation_num': inline_equation_num
}
return para_content
def para_to_standard_format_v2(para_block, img_buket_path):
para_type = para_block['type']
if para_type == BlockType.Text:
para_content = {
'type': 'text',
'text': merge_para_with_text(para_block),
}
elif para_type == BlockType.Title:
para_content = {
'type': 'text',
'text': merge_para_with_text(para_block),
'text_level': 1
}
elif para_type == BlockType.InterlineEquation:
para_content = {
'type': 'equation',
'text': merge_para_with_text(para_block),
'text_format': "latex"
}
elif para_type == BlockType.Image:
para_content = {
'type': 'image',
}
for block in para_block['blocks']:
if block['type'] == BlockType.ImageBody:
para_content['img_path'] = join_path(img_buket_path, block["lines"][0]["spans"][0]['image_path'])
if block['type'] == BlockType.ImageCaption:
para_content['img_caption'] = merge_para_with_text(block)
elif para_type == BlockType.Table:
para_content = {
'type': 'table',
}
for block in para_block['blocks']:
if block['type'] == BlockType.TableBody:
para_content['img_path'] = join_path(img_buket_path, block["lines"][0]["spans"][0]['image_path'])
if block['type'] == BlockType.TableCaption:
para_content['table_caption'] = merge_para_with_text(block)
if block['type'] == BlockType.TableFootnote:
para_content['table_footnote'] = merge_para_with_text(block)
return para_content
def make_standard_format_with_para(pdf_info_dict: list, img_buket_path: str):
content_list = []
for page_info in pdf_info_dict:
paras_of_layout = page_info.get("para_blocks")
if not paras_of_layout:
continue
for para_block in paras_of_layout:
para_content = para_to_standard_format_v2(para_block, img_buket_path)
content_list.append(para_content)
return content_list
def line_to_standard_format(line, img_buket_path):
line_text = ""
inline_equation_num = 0
for span in line['spans']:
if not span.get('content'):
if not span.get('image_path'):
continue
else:
if span['type'] == ContentType.Image:
content = {
'type': 'image',
'img_path': join_path(img_buket_path, span['image_path'])
}
return content
elif span['type'] == ContentType.Table:
content = {
'type': 'table',
'img_path': join_path(img_buket_path, span['image_path'])
}
return content
else:
if span['type'] == ContentType.InterlineEquation:
interline_equation = span['content']
content = {
'type': 'equation',
'latex': f"$$\n{interline_equation}\n$$"
}
return content
elif span['type'] == ContentType.InlineEquation:
inline_equation = span['content']
line_text += f"${inline_equation}$"
inline_equation_num += 1
elif span['type'] == ContentType.Text:
text_content = ocr_escape_special_markdown_char(span['content']) # 转义特殊符号
line_text += text_content
content = {
'type': 'text',
'text': line_text,
'inline_equation_num': inline_equation_num
}
return content
def ocr_mk_mm_standard_format(pdf_info_dict: list):
"""
content_list
type string image/text/table/equation(行间的单独拿出来，行内的和text合并)
latex string latex文本字段。
text string 纯文本格式的文本数据。
md string markdown格式的文本数据。
img_path string s3://full/path/to/img.jpg
"""
content_list = []
for page_info in pdf_info_dict:
blocks = page_info.get("preproc_blocks")
if not blocks:
continue
for block in blocks:
for line in block['lines']:
content = line_to_standard_format(line)
content_list.append(content)
return content_list
def union_make(pdf_info_dict: list, make_mode: str, drop_mode: str, img_buket_path: str = ""):
output_content = []
for page_info in pdf_info_dict:
if page_info.get("need_drop", False):
drop_reason = page_info.get("drop_reason")
if drop_mode == DropMode.NONE:
pass
elif drop_mode == DropMode.WHOLE_PDF:
raise Exception(f"drop_mode is {DropMode.WHOLE_PDF} , drop_reason is {drop_reason}")
elif drop_mode == DropMode.SINGLE_PAGE:
logger.warning(f"drop_mode is {DropMode.SINGLE_PAGE} , drop_reason is {drop_reason}")
continue
else:
raise Exception(f"drop_mode can not be null")
paras_of_layout = page_info.get("para_blocks")
if not paras_of_layout:
continue
if make_mode == MakeMode.MM_MD:
page_markdown = ocr_mk_markdown_with_para_core_v2(paras_of_layout, "mm", img_buket_path)
output_content.extend(page_markdown)
elif make_mode == MakeMode.NLP_MD:
page_markdown = ocr_mk_markdown_with_para_core_v2(paras_of_layout, "nlp")
output_content.extend(page_markdown)
elif make_mode == MakeMode.STANDARD_FORMAT:
for para_block in paras_of_layout:
para_content = para_to_standard_format_v2(para_block, img_buket_path)
output_content.append(para_content)
if make_mode in [MakeMode.MM_MD, MakeMode.NLP_MD]:
return '\n\n'.join(output_content)
elif make_mode == MakeMode.STANDARD_FORMAT:
return output_content
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