Added support for anchor link generation.

flask/helpers.py

@@ -18,6 +18,7 @@ import mimetypes
 from time import time
 from zlib import adler32
 from threading import RLock
+from werkzeug.urls import url_quote
 
 # try to load the best simplejson implementation available.  If JSON
 # is not installed, we add a failing class.
@@ -184,9 +185,13 @@ def url_for(endpoint, **values):
 
     For more information, head over to the :ref:`Quickstart <url-building>`.
 
+    .. versionadded:: 0.9
+       The `_anchor` parameter was added.
+
     :param endpoint: the endpoint of the URL (name of the function)
     :param values: the variable arguments of the URL rule
     :param _external: if set to `True`, an absolute URL is generated.
+    :param _anchor: if provided this is added as anchor to the URL.
     """
     ctx = _request_ctx_stack.top
     blueprint_name = request.blueprint
@@ -204,8 +209,12 @@ def url_for(endpoint, **values):
         elif endpoint.startswith('.'):
             endpoint = endpoint[1:]
     external = values.pop('_external', False)
+    anchor = values.pop('_anchor', None)
     ctx.app.inject_url_defaults(endpoint, values)
-    return ctx.url_adapter.build(endpoint, values, force_external=external)
+    rv = ctx.url_adapter.build(endpoint, values, force_external=external)
+    if anchor is not None:
+        rv += '#' + url_quote(anchor)
+    return rv
 
 
 def get_template_attribute(template_name, attribute):