layim 里面的表情图片转换

//转换内容
  layui.data.content = function(content){
    //支持的html标签
    var html = function(end){
      return new RegExp('\\n*\\['+ (end||'') +'(code|pre|div|span|p|table|thead|th|tbody|tr|td|ul|li|ol|li|dl|dt|dd|h2|h3|h4|h5)([\\s\\S]*?)\\]\\n*', 'g');
    };
    content = (content||'').replace(/&(?!#?[a-zA-Z0-9]+;)/g, '&')
    .replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/'/g, '&#39;').replace(/"/g, '&quot;') //XSS
    .replace(/@(\S+)(\s+?|$)/g, '@<a href="javascript:;">$1</a>$2') //转义@
    
    .replace(/face\[([^\s\[\]]+?)\]/g, function(face){  //转义表情
      var alt = face.replace(/^face/g, '');
      return '<img alt="'+ alt +'" title="'+ alt +'" src="' + faces[alt] + '">';
    })
    .replace(/img\[([^\s]+?)\]/g, function(img){  //转义图片
      return '<img class="layui-layim-photos" src="' + img.replace(/(^img\[)|(\]$)/g, '') + '">';
    })
    .replace(/file\([\s\S]+?\)\[[\s\S]*?\]/g, function(str){ //转义文件
      var href = (str.match(/file\(([\s\S]+?)\)\[/)||[])[1];
      var text = (str.match(/\)\[([\s\S]*?)\]/)||[])[1];
      if(!href) return str;
      return '<a class="layui-layim-file" href="'+ href +'" download target="_blank"><i class="layui-icon">&#xe61e;</i><cite>'+ (text||href) +'</cite></a>';
    })
    .replace(/audio\[([^\s]+?)\]/g, function(audio){  //转义音频
      return '<div class="layui-unselect layui-layim-audio" layim-event="playAudio" data-src="' + audio.replace(/(^audio\[)|(\]$)/g, '') + '"><i class="layui-icon">&#xe652;</i><p>音频消息</p></div>';
    })
    .replace(/video\[([^\s]+?)\]/g, function(video){  //转义音频
      return '<div class="layui-unselect layui-layim-video" layim-event="playVideo" data-src="' + video.replace(/(^video\[)|(\]$)/g, '') + '"><i class="layui-icon">&#xe652;</i></div>';
    })
    
    .replace(/a\([\s\S]+?\)\[[\s\S]*?\]/g, function(str){ //转义链接
      var href = (str.match(/a\(([\s\S]+?)\)\[/)||[])[1];
      var text = (str.match(/\)\[([\s\S]*?)\]/)||[])[1];
      if(!href) return str;
      return '<a href="'+ href +'" target="_blank">'+ (text||href) +'</a>';
    }).replace(html(), '\<$1 $2\>').replace(html('/'), '\</$1\>') //转移HTML代码
    .replace(/\n/g, '<br>') //转义换行 
    return content;
  };