+function! s:NM_cmd_show_mkfolds()
+ let modetype = ''
+ let modeline = -1
+ let lnum = 1
+ while lnum <= line('$')
+ let line = getline(lnum)
+ if modetype == ''
+ if match(line, s:notmuch_show_signature_regexp) != -1
+ let modetype = 'sig'
+ let modeline = lnum
+ elseif match(line, s:notmuch_show_citation_regexp) != -1
+ let modetype = 'cit'
+ let modeline = lnum
+ endif
+ elseif modetype == 'cit'
+ if match(line, s:notmuch_show_citation_regexp) == -1
+ exec printf('%d,%dfold', modeline, lnum)
+ let modetype = ''
+ endif
+ elseif modetype == 'sig'
+ if (lnum - modeline) > s:notmuch_show_signature_lines_max
+ let modetype = ''
+ elseif match(line, s:notmuch_show_part_end_regexp) != -1
+ exec printf('%d,%dfold', modeline, lnum)
+ let modetype = ''
+ endif
+ endif
+
+ let lnum = lnum + 1
+ endwhile
+endfunction
+