def __init__(self, debug=True):
self.resources = OrderedDict()
self.debug = debug
class ResourceRegistry(object):
""" The resource registry is used to register javascript and
css that is used by rctk. It allows the main page to be
built dynamically and allows certain optimizations such as
- merging
- compression
- caching
- keep resources local to the code
- possibility to render inline
Currently, the ResourceRegistry can't properly handle @import in css.
It would probably need to load and merge these imports itself, or load
the imported css into the registry itself, possibly renaming the css in
the process.
At this point, this is only an issue with jqueryui, which we'll keep
as a static dependency for now.
"""
def __init__(self, debug=True):
self.resources = OrderedDict()
self.debug = debug
def add(self, resource):
## avoid duplicates
## XXX optimze
if resource in self.resources.values():
## return its name nonetheless
for k, v in self.resources.iteritems():
if v == resource:
return k
assert "This can't happen"
name = resource.name
counter = 1
while name in self.resources:
name = "%s%d" % (resource.name, counter)
counter += 1
self.resources[name] = resource
return name
##
## (also) provide a way to filter on mimetype, allow matching against
## image/* as well.
def names(self):
return self.resources.keys()
def css_resources(self):
""" return references to css resources. They may be merged so it
may be just a single resource """
return [k for (k,v) in self.resources.items()
if isinstance(v, (CSSFileResource, CSSResource))]
def js_resources(self):
""" return references to css resources. They may be merged so it
may be just a single resource """
return [k for (k,v) in self.resources.items()
if isinstance(v, (JSFileResource, JSResource))]
def get_resource(self, name, elements=[]):
"""
return a (type, data) tuple containing the mimetype and resource
data
"""
r = self.resources[name]
## XXX this is rather ugly way of passing the RR's debug setting
r.debug = self.debug
if isinstance(r, DynamicResource):
r = r(elements)
return r
def header(self):
""" return html usable for injection into <head></head> """
res = []
for css in self.css_resources():
o = self.resources[css]
if self.debug:
timestamp = "?%d" % o.timestamp()
res.append('<link type="text/css" href="resources/%s%s"'
'rel="stylesheet" />' % (css, timestamp))
for js in self.js_resources():
o = self.resources[js]
if self.debug:
timestamp = "?%d" % o.timestamp()
res.append('<script type="text/javascript"'
'src="resources/%s%s"></script>' % (js, timestamp))
return '<!-- dynamic resources -->\n%s\n<!-- end dynamic resources -->' % '\n'.join(res)
