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"""
source: https://gist.github.com/1311010
Get django-sekizai, django-compessor (and django-cms) playing nicely together
re: https://github.com/ojii/django-sekizai/issues/4
using: https://github.com/django-compressor/django-compressor.git
and: https://github.com/ojii/django-sekizai.git@0.6 or later
"""
from compressor.templatetags.compress import CompressorNode
from compressor.exceptions import UncompressableFileError
from compressor.base import Compressor
from compressor.conf import settings
from compressor.utils import get_class
from django.template.base import TextNode
def compress(context, data, name):
"""
Data is the string from the template (the list of js files in this case)
Name is either 'js' or 'css' (the sekizai namespace)
Basically passes the string through the {% compress 'js' %} template tag
"""
# separate compressible from uncompressable files
parser = get_class(settings.COMPRESS_PARSER)(data)
js_compressor, css_compressor = Compressor("js"), Compressor("css")
compressable_elements, expanded_elements, deferred_elements = [], [], []
if name == "js":
for elem in parser.js_elems():
attribs = parser.elem_attribs(elem)
try:
if "src" in attribs:
js_compressor.get_basename(attribs["src"])
except UncompressableFileError:
if "defer" in attribs:
deferred_elements.append(elem)
else:
expanded_elements.append(elem)
else:
compressable_elements.append(elem)
elif name == "css":
for elem in parser.css_elems():
attribs = parser.elem_attribs(elem)
try:
if (
parser.elem_name(elem) == "link"
and attribs["rel"].lower() == "stylesheet"
):
css_compressor.get_basename(attribs["href"])
except UncompressableFileError:
expanded_elements.append(elem)
else:
compressable_elements.append(elem)
# reconcatenate them
data = "".join(parser.elem_str(e) for e in expanded_elements)
expanded_node = CompressorNode(nodelist=TextNode(data), kind=name, mode="file")
data = "".join(parser.elem_str(e) for e in compressable_elements)
compressable_node = CompressorNode(nodelist=TextNode(data), kind=name, mode="file")
data = "".join(parser.elem_str(e) for e in deferred_elements)
deferred_node = CompressorNode(nodelist=TextNode(data), kind=name, mode="file")
return "\n".join(
[
expanded_node.get_original_content(context=context),
compressable_node.render(context=context),
deferred_node.get_original_content(context=context),
]
)
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