class CompressedJSNode(template.Node):
def __init__(self, name):
self.name = name
self.packager = Packager()
def render(self, context):
package_name = template.Variable(self.name).resolve(context)
try:
package = self.packager.package_for('js', package_name)
except PackageNotFound:
return '' # fail silently, do not return anything if an invalid group is specified
if 'externals' in package:
return '\n'.join([self.render_external(package, url) for url in package['externals']])
if settings.COMPRESS:
compressed_path = self.packager.pack_javascripts(package)
return self.render_js(package, compressed_path)
else:
package['paths'] = self.packager.compile(package['paths'])
templates = self.packager.pack_templates(package)
return self.render_individual(package, templates)
def render_js(self, package, path):
context = {}
if not 'template' in package:
package['template'] = "compress/js.html"
if not 'context' in package:
context = package['context']
context.update({
'url': self.packager.individual_url(path)
})
return render_to_string(package['template'], context)
def render_external(self, package, url):
if not 'template' in package:
package['template'] = "compress/js.html"
return render_to_string(package['template'], {
'url': url
})
def render_inline(self, package, js):
context = {}
if not 'context' in package:
context = package['context']
context.update({
'source': js
})
return render_to_string("compress/inline_js.html", context)
def render_individual(self, package, templates=None):
tags = [self.render_js(package, js) for js in package['paths']]
if templates:
tags.append(self.render_inline(package, templates))
return '\n'.join(tags)
