当前位置:/AngularJS API/ngSanitize/ 过滤器(filter)/linky

linky能找出文本中的链接,然后把它转换成html链接.什么意思,就是说,一段文本里有一个链接,但是这个链接没有被a标签嵌套,linky能把它找出来,然后给它加上a标签并且给a链接添加正确的href属性,还可以设置打开的方式(_blank,_self,等...)。

它查找链接是根据这些关键词来的: http/https/ftp/mailto/,或者就直接是一个email地址。


用法

在html模板绑定中

<span ng-bind-html="linky_expression | linky"></span>

在Javascript中

$filter('linky')(text, target, attributes)

参数

参数 类型 描述
text string 输入的文本
target string Window (_blank|_self|_parent|_top) 或者要打开的 frame 名。
attributes(可选) object
function(url)
给链接元素增加自定义属性

实例

<div ng-controller="ExampleController">
Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
<table>
  <tr>
    <th>Filter</th>
    <th>Source</th>
    <th>Rendered</th>
  </tr>
  <tr id="linky-filter">
    <td>linky filter</td>
    <td>
      <pre><div ng-bind-html="snippet | linky"><br></div></pre>
    </td>
    <td>
      <div ng-bind-html="snippet | linky"></div>
    </td>
  </tr>
  <tr id="linky-target">
   <td>linky target</td>
   <td>
     <pre><div ng-bind-html="snippetWithSingleURL | linky:'_blank'"><br></div></pre>
   </td>
   <td>
     <div ng-bind-html="snippetWithSingleURL | linky:'_blank'"></div>
   </td>
  </tr>
  <tr id="linky-custom-attributes">
   <td>linky custom attributes</td>
   <td>
     <pre><div ng-bind-html="snippetWithSingleURL | linky:'_self':{rel: 'nofollow'}"><br></div></pre>
   </td>
   <td>
     <div ng-bind-html="snippetWithSingleURL | linky:'_self':{rel: 'nofollow'}"></div>
   </td>
  </tr>
  <tr id="escaped-html">
    <td>no filter</td>
    <td><pre><div ng-bind="snippet"><br></div></pre></td>
    <td><div ng-bind="snippet"></div></td>
  </tr>
</table>
angular.module('linkyExample', ['ngSanitize'])
.controller('ExampleController', ['$scope', function($scope) {
  $scope.snippet =
    'Pretty text with some links:\n' +
    'http://angularjs.org/,\n' +
    'mailto:us@somewhere.org,\n' +
    'another@somewhere.org,\n' +
    'and one more: ftp://127.0.0.1/.';
  $scope.snippetWithSingleURL = 'http://angularjs.org/';
}]);
it('should linkify the snippet with urls', function() {
  expect(element(by.id('linky-filter')).element(by.binding('snippet | linky')).getText()).
      toBe('Pretty text with some links: http://angularjs.org/, us@somewhere.org, ' +
           'another@somewhere.org, and one more: ftp://127.0.0.1/.');
  expect(element.all(by.css('#linky-filter a')).count()).toEqual(4);
});

it('should not linkify snippet without the linky filter', function() {
  expect(element(by.id('escaped-html')).element(by.binding('snippet')).getText()).
      toBe('Pretty text with some links: http://angularjs.org/, mailto:us@somewhere.org, ' +
           'another@somewhere.org, and one more: ftp://127.0.0.1/.');
  expect(element.all(by.css('#escaped-html a')).count()).toEqual(0);
});

it('should update', function() {
  element(by.model('snippet')).clear();
  element(by.model('snippet')).sendKeys('new http://link.');
  expect(element(by.id('linky-filter')).element(by.binding('snippet | linky')).getText()).
      toBe('new http://link.');
  expect(element.all(by.css('#linky-filter a')).count()).toEqual(1);
  expect(element(by.id('escaped-html')).element(by.binding('snippet')).getText())
      .toBe('new http://link.');
});

it('should work with the target property', function() {
 expect(element(by.id('linky-target')).
     element(by.binding("snippetWithSingleURL | linky:'_blank'")).getText()).
     toBe('http://angularjs.org/');
 expect(element(by.css('#linky-target a')).getAttribute('target')).toEqual('_blank');
});

it('should optionally add custom attributes', function() {
 expect(element(by.id('linky-custom-attributes')).
     element(by.binding("snippetWithSingleURL | linky:'_self':{rel: 'nofollow'}")).getText()).
     toBe('http://angularjs.org/');
 expect(element(by.css('#linky-custom-attributes a')).getAttribute('rel')).toEqual('nofollow');
});