add option 'scripts' to mapper which allows to load javascripts in header

Closes #6184

mandaye/dispatcher.py

@@ -6,6 +6,7 @@ from urlparse import urlparse
 from importlib import import_module
 
 from mandaye import config
+from mandaye.filters.default import MandayeFilter
 from mandaye.http import HTTPRequest, HTTPResponse
 from mandaye.log import logger
 from mandaye.mappers import default
@@ -66,6 +67,14 @@ class Dispatcher(object):
         """
         if not mapper.has_key('method') or \
                 mapper['method'] == self.env['REQUEST_METHOD']:
+            if mapper.has_key('scripts'):
+                req_mapping["on_response"].append(
+                        {
+                            'filter': MandayeFilter.add_js_header,
+                            'values': {'scripts': mapper['scripts']},
+                            'content-types': ['text/html']
+                            }
+                        )
             for hookname in req_mapping:
                 if mapper.has_key(hookname):
                     if isinstance(req_mapping[hookname], list):

mandaye/filters/default.py

@@ -58,6 +58,28 @@ class MandayeFilter(object):
                         '%s://%s' % (env["mandaye.scheme"], env["HTTP_HOST"]))
         return response
 
+    @staticmethod
+    def add_js_header(env, values, request, response):
+        if response.msg:
+            if not "mjQuery = jQuery.noConflict" in response.msg:
+                response.msg = re.sub(
+                        r'<head(.*?)>',
+                        r"""<head\1>
+                <script src="%s/js/jquery-1.11.1.min.js" type="text/javascript"></script>
+                <script>
+                mjQuery = jQuery.noConflict( true );
+                </script>""" % (config.static_url),
+                response.msg, 1, re.IGNORECASE)
+            scripts_html = ""
+            for script in values["scripts"]:
+                scripts_html += '<script src="%s/%s" charset="UTF-8" type="text/javascript"></script>' % \
+                        (config.static_url, script)
+            response.msg = re.sub(
+                    '</head>',
+                    '%s</head>' % scripts_html,
+                    response.msg, 1, re.IGNORECASE)
+        return response
+
     @staticmethod
     def addtoolbar(env, values, request, response):
         if config.mandaye_offline_toolbar or \