492 lines
17 KiB
Python
492 lines
17 KiB
Python
import re
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from textwrap import fill
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import requests
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from bs4 import NavigableString
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from bs4 import BeautifulSoup
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from markdownify import MarkdownConverter, chomp, UNDERLINED, ATX_CLOSED
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import copy
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from . import picture_process
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# <br>是否是单元格内部的换行符
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def judge_br_in_table(el):
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if el.name in ['td', 'tr']:
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return True
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if el.parent is None:
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return False
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# 递归父级元素
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return judge_br_in_table(el.parent)
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# 获取div标签中是否为标题，如果是标题则markdown中的返回标题等级
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def get_markdown_title_level(el):
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if el.name != 'div' or 'class' not in el.attrs:
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return ''
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title_level = ''
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if 'hdwiki_tmml' in el.attrs['class']:
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title_level = '## '
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elif 'hdwiki_tmmll' in el.attrs['class']:
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title_level = '### '
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return title_level
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def str_is_title(text) -> bool:
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text = text.strip()
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pattern = r'^#+'
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# 使用re.search匹配字符串开头的 # 符号
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match = re.search(pattern, text)
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if match:
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return True
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else:
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return False
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# 判断el 是否是图片的DIV标签
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def is_img_div_tag(el) -> bool:
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if el is None:
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return False
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if el.name != "div":
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return False
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class_attr = el.get('class')
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if class_attr is None:
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return False
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if "img" in class_attr or "img_l" in class_attr:
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return True
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else:
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return False
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# 判断div内部是否是纯文本内容，并且display是否为block
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def is_only_text_div(el) -> bool:
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if el is None or el.name != "div" or el.text == "":
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return False
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if el.get("display", "block") != "block":
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return False
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# div标签下只包含文本
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if isinstance(el.string, NavigableString):
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return True
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# 兼容<div><b>1. 版本概述</b> </div> 判断错误问题
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# 递归获取所有子标签
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child_tags = el.find_all(recursive=True)
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for tag in child_tags:
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if tag.text == "":
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continue
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if tag.name in ["table", "td", "img"]:
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return False
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if isinstance(tag.string, NavigableString):
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continue
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else:
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return False
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return True
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# a标签是否在图片的div标签内部
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def a_tag_is_in_img(el) -> bool:
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if el.parent is None:
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return False
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if el.name != "a" or el.parent.name != "div":
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return False
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return is_img_div_tag(el.parent)
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class CustomMarkDownConverter(MarkdownConverter):
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"""
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创建自定义的换行装换函数
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"""
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def __init__(self, img_download_path, **options):
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super().__init__(**options)
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self.img_download_path = img_download_path
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# 单元格内的换行依旧保持<br>格式
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def convert_br(self, el, text, convert_as_inline):
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if judge_br_in_table(el):
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return "<br/>"
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# 容错处理(文章4696)，因bs4解析html错误 导致将 分类图标签 解析到了br标签下导致图片丢失
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if text.strip():
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return text + "\n"
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return super().convert_br(el, text, convert_as_inline)
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# 图片div标签 在图片与图片描述之间添加换行
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@staticmethod
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def convert_img_div(text):
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pattern = r'\*\*(.*?)\*\*'
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match = re.search(pattern, text)
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if match:
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start_index = match.start()
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text = text[:start_index] + "\n" + text[start_index:]
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return text
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# 装换标题格式
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def convert_div(self, el, text, convert_as_inline):
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title_level = get_markdown_title_level(el)
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if title_level != '':
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return "\n\n" + title_level + text + '\n\n'
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if is_img_div_tag(el):
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# 图片与图片描述文字之间掺入换行符
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return self.convert_img_div(text)
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if is_only_text_div(el):
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text = "\n\n" + text + "\n\n"
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return text
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# 检查 URL 是否有效的函数
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@staticmethod
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def is_valid_url(url):
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try:
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response = requests.head(url, allow_redirects=True)
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return response.status_code == 200
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except requests.RequestException:
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return False
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@staticmethod
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def try_complete_img_description(img_el):
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if img_el is None or img_el.name != "img":
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return
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# 找到父级的div标签
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img_el_parent_div = None
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cur_el = img_el
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while cur_el.parent is not None:
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if is_img_div_tag(cur_el.parent):
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img_el_parent_div = cur_el.parent
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break
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cur_el = cur_el.parent
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if img_el_parent_div is not None and len(img_el_parent_div.text) != 0:
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img_el.attrs["alt"] = img_el_parent_div.text
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return
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# 找到父级的figure标签
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img_el_parent_div = None
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cur_el = img_el
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while cur_el.parent is not None:
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if cur_el.parent is not None and cur_el.parent.name == 'figure':
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img_el_parent_div = cur_el.parent
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break
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cur_el = cur_el.parent
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if img_el_parent_div is not None and len(img_el_parent_div.text) != 0:
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img_el.attrs["alt"] = img_el_parent_div.text
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return
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def convert_figcaption(self, el, text, convert_as_inline):
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return ""
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# 图片后添加空行，图片应该单独在一行后面不接文字（示例文章：6925）
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def convert_img(self, el, text, convert_as_inline):
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self.try_complete_img_description(el)
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img_text = super().convert_img(el, text, convert_as_inline)
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# 5195 出现img标签内出现换行导致 markdown图片显示出现问题
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img_text = img_text.replace("\r\n", "")
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img_text = img_text.replace("\n", "")
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# 空的img标签直接返回空行
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if img_text == "![]()":
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return '\n\n'
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# img 标签使用父级超链接标签中的中大图
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src = el.attrs.get('src', None) or ''
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if el.parent is not None and el.parent.name == "a":
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href = el.parent.attrs.get('href', None) or ''
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href_path = href.rsplit(".", 1)[0]
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src_path = src.rsplit(".", 1)[0]
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if href_path + "_s" == src_path:
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img_text = img_text.replace(src, href)
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if '_s' in img_text:
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src_path = src.rsplit(".", 1)[0]
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if src_path.endswith('_s'):
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original_src_path = src_path[:-2] # 去掉末尾的 '_s'
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# 构建原始 URL
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original_url = original_src_path + "." + src.split(".")[-1]
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if self.is_valid_url(original_url):
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img_text = img_text.replace(src, original_url)
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# 转换并下载图片
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return picture_process.process_img_tag(img_text, self.img_download_path)
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@staticmethod
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def is_img_describe_strong(el) -> bool:
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if el is None or el.parent is None:
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return False
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if len(el.contents) == 0:
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return False
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# if not isinstance(el.contents[0], NavigableString):
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# return False
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img_list = el.parent.findAll("img")
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if len(img_list) == 0:
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return False
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for img_tag in img_list:
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alt = img_tag.get("alt", None)
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title = img_tag.get("title", None)
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if alt is None and title is None:
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continue
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if alt == el.text or title == el.text:
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return True
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return False
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def convert_b(self, el, text, convert_as_inline):
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# 如果b 标签下只存在一个标题，则该b不做任何处理，避免对标题进行加粗（示例文章：6925）
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if len(el.contents) == 1:
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title_level = get_markdown_title_level(el.contents[0])
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if title_level != '':
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return text
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# <b> 标签中存在标题时，不在对内容进行加粗
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if str_is_title(text):
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return text
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if self.is_img_describe_strong(el):
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return ""
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text = text.strip(" \t")
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suffix = ""
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if text.endswith("\n"):
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suffix = " \n"
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b_text = super().convert_b(el, text, convert_as_inline)
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# 解析完<b> 标签后添加空格。避免出现markdown文档中出现《**1.****版本概述**》(文章2377 4292等)
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return " " + b_text + suffix + " "
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convert_strong = convert_b
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# 有可能出现<p>之后紧接一个标题hdwiki_tmml 故前后添加换行
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def convert_p(self, el, text, convert_as_inline):
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if convert_as_inline:
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return text
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if self.options['wrap']:
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text = fill(text,
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width=self.options['wrap_width'],
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break_long_words=False,
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break_on_hyphens=False)
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# <p>标签前后换行
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return '\n\n%s\n\n' % text if text else ''
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def convert_a(self, el, text, convert_as_inline):
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prefix, suffix, text = chomp(text)
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if not text:
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return ''
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href = el.get('href')
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if self.is_href_img(href):
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return text
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title = el.get('title')
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# 5195 出现img标签内出现换行导致 markdown图片显示出现问题
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if title is not None:
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title = title.replace("\n", "")
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# For the replacement see #29: text nodes underscores are escaped
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if (self.options['autolinks']
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and text.replace(r'\_', '_') == href
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and not title
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and not self.options['default_title']):
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# Shortcut syntax
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return '<%s>' % href
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if self.options['default_title'] and not title:
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title = href
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title_part = ' "%s"' % title.replace('"', r'\"') if title else ''
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a_tag = '%s[%s](%s%s)%s' % (prefix, text, href, title_part, suffix) if href else text
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return a_tag
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@staticmethod
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def is_href_img(href_url) -> bool:
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if href_url is None:
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return False
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file_extension = href_url.split(".")[-1]
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# 不是图片不处理
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file_extension = file_extension.lower()
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if file_extension not in ["jpg", "jpeg", "png", "gif"]:
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return False
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return True
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def convert_li(self, el, text, convert_as_inline):
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# 为空的li标签返回空(文章 4347)
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if not text.strip():
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return ""
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li_text = super().convert_li(el, text, convert_as_inline)
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return li_text
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def convert_td(self, el, text, convert_as_inline):
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if "\r\n" in text:
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text = text.replace("\r\n", "<br>")
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if "\n" in text:
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text = text.replace("\n", "<br>")
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return ' ' + text + ' |'
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def convert_hn(self, n, el, text, convert_as_inline):
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if convert_as_inline:
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return text
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style = self.options['heading_style'].lower()
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text = text.rstrip()
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if style == UNDERLINED and n <= 2:
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line = '=' if n == 1 else '-'
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return self.underline(text, line)
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hashes = '#' * n
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hashes = hashes + " "
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if style == ATX_CLOSED:
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return '\n\n %s %s %s\n\n' % (hashes, text, hashes)
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return '\n\n%s %s\n\n' % (hashes, text)
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@staticmethod
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def convert_thead_table(el, text, cell_name, convert_as_inline):
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cells = el.find_all(['td', 'th'])
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is_headrow = all([cell.name == cell_name for cell in cells])
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overline = ''
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underline = ''
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if is_headrow and not el.previous_sibling:
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# first row and is headline: print headline underline
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underline += '| ' + ' | '.join(['---'] * len(cells)) + ' |' + '\n'
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elif (not el.previous_sibling
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and (el.parent.name == 'table'
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or (el.parent.name == 'tbody'
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and not el.parent.previous_sibling))):
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# first row, not headline, and:
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# - the parent is table or
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# - the parent is tbody at the beginning of a table.
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# print empty headline above this row
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overline += '| ' + ' | '.join([''] * len(cells)) + ' |' + '\n'
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overline += '| ' + ' | '.join(['---'] * len(cells)) + ' |' + '\n'
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return overline + '|' + text + '\n' + underline
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def convert_tr(self, el, text, convert_as_inline):
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# 解决table标签下存在thead的问题 (文章4061 1976)
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if el and el.parent and el.parent.name == "thead":
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return CustomMarkDownConverter.convert_thead_table(el, text, 'td', convert_as_inline)
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# 兼容 table->colgroup、tbody->tr 文章4364
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if (el and el.parent and el.parent.previousSibling
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and el.parent.name == "tbody"
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and el.parent.previousSibling.name == "colgroup"):
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return CustomMarkDownConverter.convert_thead_table(el, text, 'td', convert_as_inline)
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return super().convert_tr(el, text, convert_as_inline)
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def convert_pre(self, el, text, convert_as_inline):
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# 文章5192出现pre标签，但内容不是代码。故不额外处理pre标签
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return text
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def escape(self, text):
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if not text:
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return ''
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if self.options['escape_misc']:
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# text = re.sub(r'([\\&<`[>~#=+|-])', r'\\\1', text)
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text = re.sub(r'([\\&<`[>~#%=+|-])', r'\\\1', text)
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# 以下的转义是不必要的
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# text = re.sub(r'([0-9])([.)])', r'\1\\\2', text)
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if self.options['escape_asterisks']:
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text = text.replace('*', r'\*')
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if self.options['escape_underscores']:
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text = text.replace('_', r'\_')
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return text
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@staticmethod
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def convert_span(el, text, convert_as_inline):
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# 文章3526出现图片后面紧接图片文本的问题。图片文本在span标签内
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if "style" not in el.attrs:
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return text
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style_attr = el.attrs['style']
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if style_attr is None:
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return text
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style_content = style_attr.split(';')
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# 遍历style属性内容，找到display的值
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for item in style_content:
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if 'display' in item:
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display_value = item.split(': ')[1] # 获取冒号后的值
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if display_value == "block" and text != "":
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return f"\n\n{text}\n\n"
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return text
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def expand_html_table(html) -> tuple[str, bool]:
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soup = BeautifulSoup(html, 'html.parser')
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tables = soup.find_all('table')
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if len(tables) == 0:
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return html, False
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for table in tables:
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# 创建一个二维列表来表示表格
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table_rows = table.find_all('tr')
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max_cols = 0
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for row in table_rows:
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cols = row.find_all(['td', 'th'])
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col_count = sum([int(col.get('colspan', 1)) for col in cols])
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if col_count > max_cols:
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max_cols = col_count
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# 初始化一个二维列表来存储最终的表格
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result_table = []
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for _ in range(len(table_rows)):
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result_table.append([None] * max_cols)
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# 填充二维列表
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for r, row in enumerate(table_rows):
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cols = row.find_all(['td', 'th'])
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c = 0
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for col in cols:
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while result_table[r][c] is not None:
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c += 1
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colspan = int(col.get('colspan', 1))
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rowspan = int(col.get('rowspan', 1))
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for i in range(rowspan):
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for j in range(colspan):
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# 拆分合并单元格时，重复内容
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result_table[r + i][c + j] = copy.copy(col)
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# if j == 0 and i == 0:
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# result_table[r + i][c + j] = copy.copy(col)
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# else:
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# result_table[r + i][c + j] = soup.new_tag('td')
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c += colspan
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# 生成新的表格 HTML
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new_table = soup.new_tag('table', border="1", cellspacing="0")
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tbody = soup.new_tag('tbody')
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new_table.append(tbody)
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for row in result_table:
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tr = soup.new_tag('tr')
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for col in row:
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if col is not None:
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td = soup.new_tag(col.name)
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td.string = col.get_text()
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tr.append(td)
|
|
tbody.append(tr)
|
|
|
|
# 替换原始HTML中的旧表格
|
|
table.replace_with(new_table)
|
|
|
|
return str(soup), True
|
|
|
|
|
|
# Create shorthand method for conversion
|
|
def md(html, img_download_path, **options):
|
|
new_html, result = expand_html_table(html)
|
|
markdown_content = CustomMarkDownConverter(img_download_path, **options).convert(new_html)
|
|
# 删除换行符中间的空格
|
|
temp_txt = re.sub(r'\n\s*\n', '\n\n', markdown_content)
|
|
# 连续超过3个以上的换行符替换为3个
|
|
temp_txt = re.sub(r'\n{3,}', '\n\n\n', temp_txt)
|
|
return temp_txt
|