def add_css_style_for_block(c,head_key,value_key,css_key)
  #tmp = []
  c_tp = c
  flag = false
  if !c.include?("{{#{css_key}}}")
    c_tp = c.clone()
    c.scan(/((?:【| )*{{#{head_key}}}((?:(?!<tr).)*){{#{value_key}}})/m) do |c1|
      flag = true
      s,e = $~.offset(0)
      tag_gs = c1[1].scan(/<(\/)*(\w+)(?:(?!<|>).)*>/)
      tag_gs.each do |tag_g|
        if tag_g[0]
          s = s - c[0...s].reverse.match(/>(?:(?!<|>).)*#{tag_g[1].reverse}</).offset(0)[1]
        else
          e = c[e..-1].match(/<\/#{tag_g[1]}(?:(?!<|>).)*>/).offset(0)[1] + e
        end
      end
      inner_c = c[s...e]
      wrap_tag = c[e..-1].match(/<\/(\w+)(?:(?!<|>).)*>/)
      e = wrap_tag.offset(0)[1] + e
      s = s - c[0...s].reverse.match(/>(?:(?!<|>).)*#{wrap_tag[1].reverse}</).offset(0)[1]
      outer_c = c[s...e]
      ext_vars = outer_c.scan(/{{((?:(?!}).)*)}}/).flatten-[head_key,value_key]
      #tmp << [outer_c,inner_c,ext_vars]
      if ext_vars.length==0
        outer_c_new = outer_c.gsub(/(<\w+)((?:(?!>).)*)(>.*)/m) do |m|
          v1 = $1
          v2 = $2
          v3 = $3
          have_style_flag = false
          v2 = v2.gsub(/(style=(?:\"|\'))((?:(?!\"|\').)*)((?:\"|\'))/) do |m2|
            have_style_flag = true
            "#{$1}#{$2}{{#{css_key}}}#{$3}"
          end
          if !have_style_flag
            v2 = v2 + " style=\"{{#{css_key}}}\""
          end
          v1+v2+v3
        end
        c_tp = c_tp.sub(outer_c,outer_c_new)
      else
        c_tp = c_tp.sub(inner_c,"<span style=\"{{#{css_key}}}\">#{inner_c}<\/span>")
      end
    end
  end
  #[tmp,c_tp]
  [flag,c_tp]
end
def update_event_news_template(folder)
  Dir["#{folder}modules/event_news_mod/*.html.erb"].each do |f|
    c = File.open(f,'r'){|f1| f1.read}.encode("UTF-8", "UTF-8", invalid: :replace, replace: "???")
    next if (c.include?("???") rescue true)
    flag1,c = add_css_style_for_block(c,'speaker-head','speaker','speaker-css')
    flag2,c = add_css_style_for_block(c,'host-head','host','host-css')
    flag3,c = add_css_style_for_block(c,'place-head','place','place-css')
    if flag1 || flag2 || flag3
      puts ['update file:',f]
      File.open(f,'w'){|f1| f1.write(c)}
    end
  end
end