From 81b166729acf8b1db46f1f69e823deb7b61bda5e Mon Sep 17 00:00:00 2001
From: antogyn <antogyn@gmail.com>
Date: Wed, 18 Nov 2015 19:08:32 +0100
Subject: [PATCH] Add striptags filter

---
 docs/cn/templating.md |  1 +
 docs/fr/templating.md |  1 +
 docs/templating.md    |  1 +
 src/filters.js        |  6 ++++++
 tests/filters.js      | 14 ++++++++++++++
 5 files changed, 23 insertions(+)

diff --git a/docs/cn/templating.md b/docs/cn/templating.md
index c2c54cf0..5e7cb5d8 100644
--- a/docs/cn/templating.md
+++ b/docs/cn/templating.md
@@ -634,6 +634,7 @@ Nunjucks 已经支持了大部分 jinja 的过滤器 (点击查看文档)。
 * [slice](http://jinja.pocoo.org/docs/templates/#slice)
 * [sort](http://jinja.pocoo.org/docs/templates/#sort)
 * [string](http://jinja.pocoo.org/docs/templates/#string)
+* [striptags](http://jinja.pocoo.org/docs/templates/#striptags)
 * [title](http://jinja.pocoo.org/docs/templates/#title)
 * [trim](http://jinja.pocoo.org/docs/templates/#trim)
 * [truncate](http://jinja.pocoo.org/docs/templates/#truncate)
diff --git a/docs/fr/templating.md b/docs/fr/templating.md
index 0660cfdf..49de9180 100644
--- a/docs/fr/templating.md
+++ b/docs/fr/templating.md
@@ -809,6 +809,7 @@ passé, cela permettra de comparer `attr` à chaque élément.
 * [selectattr](http://jinja.pocoo.org/docs/templates/#selectattr) (seulement pour le formulaire avec un unique argument)
 * [slice](http://jinja.pocoo.org/docs/templates/#slice)
 * [string](http://jinja.pocoo.org/docs/templates/#string)
+* [striptags](http://jinja.pocoo.org/docs/templates/#striptags)
 * [title](http://jinja.pocoo.org/docs/templates/#title)
 * [trim](http://jinja.pocoo.org/docs/templates/#trim)
 * [truncate](http://jinja.pocoo.org/docs/templates/#truncate)
diff --git a/docs/templating.md b/docs/templating.md
index f8aa68d1..021e4ae7 100644
--- a/docs/templating.md
+++ b/docs/templating.md
@@ -809,6 +809,7 @@ passed, will compare `attr` from each item.
 * [selectattr](http://jinja.pocoo.org/docs/templates/#selectattr) (only the single-argument form)
 * [slice](http://jinja.pocoo.org/docs/templates/#slice)
 * [string](http://jinja.pocoo.org/docs/templates/#string)
+* [striptags](http://jinja.pocoo.org/docs/templates/#striptags)
 * [title](http://jinja.pocoo.org/docs/templates/#title)
 * [trim](http://jinja.pocoo.org/docs/templates/#trim)
 * [truncate](http://jinja.pocoo.org/docs/templates/#truncate)
diff --git a/src/filters.js b/src/filters.js
index 528faae8..b95b2b15 100644
--- a/src/filters.js
+++ b/src/filters.js
@@ -398,6 +398,12 @@ var filters = {
         return r.copySafeness(obj, obj);
     },
 
+    striptags: function(input) {
+        input = normalize(input, '');
+        var tags = /<\/?([a-z][a-z0-9]*)\b[^>]*>|<!--[\s\S]*?-->/gi;
+        return r.copySafeness(input, filters.trim(input.replace(tags, '')).replace(/\s+/gi, ' '));
+    },
+
     title: function(str) {
         str = normalize(str, '');
         var words = str.split(' ');
diff --git a/tests/filters.js b/tests/filters.js
index 5248ab7e..80fd2e47 100644
--- a/tests/filters.js
+++ b/tests/filters.js
@@ -394,6 +394,20 @@
             finish(done);
         });
 
+        it('striptags', function(done) {
+            equal('{{ html | striptags }}', {html: '<foo>bar'}, 'bar');
+            equal('{{ html | striptags }}',
+                  {
+                      html: '  <p>an  \n <a href="#">example</a> link</p>\n<p>to a webpage</p> ' +
+                            '<!-- <p>and some comments</p> -->'
+                  },
+                  'an example link to a webpage');
+            equal('{{ undefined | striptags }}', '');
+            equal('{{ null | striptags }}', '');
+            equal('{{ nothing | striptags }}', '');
+            finish(done);
+        });
+
         it('title', function(done) {
             equal('{{ "foo bar baz" | title }}', 'Foo Bar Baz');
             equal('{{ str | title }}', {str: r.markSafe('foo bar baz')}, 'Foo Bar Baz');