linkify.js

'use strict';

// <p ng-bind-html="mytext | linkify | trustHTML"></p>

angular.module('myApp.filters', []).

  filter('trustHTML', ['$sce', function ($sce) {
    return function (text) {
      return $sce.trustAsHtml(text)
    }
  }]).

  filter('linkify', [function () {
    var GRUBERS_URL_RE = /\b((?:[a-z][\w-]+:(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))/i
    var HAS_PROTOCOL = /^[a-z][\w-]+:/
    
    function wordToURL (word, index, array) {
      var m = word.match(GRUBERS_URL_RE)
      var result = word, url, escapedURL, text
      if (m) {
        text = m[1]
        url = HAS_PROTOCOL.test(text) ? text : 'http://' + text
        result = result.replace(text, '<a href="' + url + '">' + text + '</a>')
      }
      return result
    }
    
    var map = Array.prototype.map ? function (arr, callback) {
      return arr.map(callback)
    } : function (arr, callback) {
      var arr2 = [], i, l
      for (i = 0, l = arr.length; i < l; i = i + 1) {
        arr2[i] = callback(arr[i], i, arr)
      }
      return arr2
    }
    
    return function (text) {
      if (!text) return ''
      return map(text.split(/\s+/), wordToURL).join(' ')
    }
  }]);