inputDirective.js

var selectCtrl = function($element) {
  var ctrl = this;
  
  $element.on('click', function(e){
    //use a method that I have to see in the docs for select the text in an input that I don't remember now, should be accesible
    //$element
  })

};

angular.module('emiliano.utils')
  .controller('selectCtrl', selectCtrl)
  .directive('selectAll', function(){
      return {
          restrict : 'AC', //A = attribute, C = class, E = Element
          controller: 'selectCtrl as ctrl',
          bindToController: true, //true or false
      }
  })

;

usage.html

<input type="text" ng-model="ctrl.someModel" selectAll/>

<input type="text" ng-model="ctrl.someModel" class="selectAll"/>