56 lines
2.5 KiB
Python
56 lines
2.5 KiB
Python
from compressor.base import Compressor, SOURCE_HUNK, SOURCE_FILE
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from compressor.conf import settings
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from compressor.exceptions import UncompressableFileError
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class CssCompressor(Compressor):
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template_name = "compressor/css.html"
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template_name_inline = "compressor/css_inline.html"
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def __init__(self, content=None, output_prefix="css", context=None):
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super(CssCompressor, self).__init__(content=content,
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output_prefix=output_prefix, context=context)
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self.filters = list(settings.COMPRESS_CSS_FILTERS)
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self.type = output_prefix
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def split_contents(self):
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if self.split_content:
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return self.split_content
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self.media_nodes = []
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for elem in self.parser.css_elems():
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data = None
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elem_name = self.parser.elem_name(elem)
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elem_attribs = self.parser.elem_attribs(elem)
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if elem_name == 'link' and elem_attribs['rel'].lower() == 'stylesheet':
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basename = self.get_basename(elem_attribs['href'])
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filename = self.get_filename(basename)
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data = (SOURCE_FILE, filename, basename, elem)
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elif elem_name == 'style':
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data = (SOURCE_HUNK, self.parser.elem_content(elem), None, elem)
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if data:
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self.split_content.append(data)
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media = elem_attribs.get('media', None)
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# Append to the previous node if it had the same media type,
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# otherwise create a new node.
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if self.media_nodes and self.media_nodes[-1][0] == media:
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self.media_nodes[-1][1].split_content.append(data)
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else:
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node = CssCompressor(content=self.parser.elem_str(elem),
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context=self.context)
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node.split_content.append(data)
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self.media_nodes.append((media, node))
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return self.split_content
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def output(self, *args, **kwargs):
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if (settings.COMPRESS_ENABLED or settings.COMPRESS_PRECOMPILERS or
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kwargs.get('forced', False)):
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# Populate self.split_content
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self.split_contents()
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if hasattr(self, 'media_nodes'):
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ret = []
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for media, subnode in self.media_nodes:
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subnode.extra_context.update({'media': media})
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ret.append(subnode.output(*args, **kwargs))
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return ''.join(ret)
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return super(CssCompressor, self).output(*args, **kwargs)
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