Fontawesome iconify

app.module.js

    angular
        .module('myapp', [...])
        .filter('iconify', ['$sce', function($sce){
          return function(input, type){
            var iconType = 'fa-file-o';
            if( input ){
              if( input.startsWith('image/')){
                iconType = 'fa-file-pdf-o';
              } else if (input == 'application/pdf') {
                iconType = 'fa-file-image-o';
              }
            } else {
              input = '';
            }

            var out = '<i class="' + input +' fa fa-2x '+iconType+'" aria-hidden="true"></i>';
            return $sce.trustAs( type || 'html', out);
          }
        }])
        .run(run);

Include fontawsome using

bower install --save fontawesome

then drop somewhere in your template

<span ng-bind-html="item.mimeType|iconify">