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from compressor.conf import settings
from compressor.base import Compressor, SOURCE_HUNK, SOURCE_FILE
class JsCompressor(Compressor):
def __init__(self, content=None, output_prefix="js", context=None):
filters = list(settings.COMPRESS_JS_FILTERS)
super(JsCompressor, self).__init__(content, output_prefix, context, filters)
def split_contents(self):
if self.split_content:
return self.split_content
self.extra_nodes = []
for elem in self.parser.js_elems():
attribs = self.parser.elem_attribs(elem)
if 'src' in attribs:
basename = self.get_basename(attribs['src'])
filename = self.get_filename(basename)
content = (SOURCE_FILE, filename, basename, elem)
else:
content = (SOURCE_HUNK, self.parser.elem_content(elem), None, elem)
self.split_content.append(content)
if 'async' in attribs:
extra = ' async'
elif 'defer' in attribs:
extra = ' defer'
else:
extra = ''
# Append to the previous node if it had the same attribute
append_to_previous = (self.extra_nodes and
self.extra_nodes[-1][0] == extra)
if append_to_previous and settings.COMPRESS_ENABLED:
self.extra_nodes[-1][1].split_content.append(content)
else:
node = self.__class__(content=self.parser.elem_str(elem),
context=self.context)
node.split_content.append(content)
self.extra_nodes.append((extra, node))
return self.split_content
def output(self, *args, **kwargs):
if (settings.COMPRESS_ENABLED or settings.COMPRESS_PRECOMPILERS or
kwargs.get('forced', False)):
self.split_contents()
if hasattr(self, 'extra_nodes'):
ret = []
for extra, subnode in self.extra_nodes:
subnode.extra_context.update({'extra': extra})
ret.append(subnode.output(*args, **kwargs))
return '\n'.join(ret)
return super(JsCompressor, self).output(*args, **kwargs)
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