[Doitsu]

I tested the Gumbo offset method, but it looks like the parser doesn't take the header into account when returning offsets. I also had to add 1 to the line number. The plugin works with a blank epub2 book but not with "real books."

BTW, I used the following plugin code:

Spoiler:

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
from xml.sax.saxutils import escape
import sigil_gumbo_bs4_adapter as gumbo_bs4
 
def run(bk):
    for id_type, id in bk.selected_iter():
        filename =  os.path.basename(bk.id_to_href(id))
        html = bk.readfile(id).replace('\r\n', '\n') 
        soup = gumbo_bs4.parse(html)
        
        for para in soup.find_all('p'):
            linenumber = para.line + 1
            colnumber = para.col
            offset = para.offset + 39
            message = escape(str(para)).replace('"', """)
            bk.add_extended_result('info', filename, linenumber, offset, 'Line: ' + str(linenumber) + ' Col: ' + str(colnumber) + ' Gumbo method: ' + message)
        
    return 0
        
def main():
    print('I reached main when I should not have\n')
    return -1

if __name__ == "__main__":
    sys.exit(main())

For your convenience, I've also attached the actual plugin.