def resolveImports(sheet, target=None):
"""Recurcively combine all rules in given `sheet` into a `target` sheet.
@import rules which use media information are tried to be wrapped into
@media rules so keeping the media information. This may not work in
all instances (if e.g. an @import rule itself contains an @import rule
with different media infos or if it is contains rules which may not be
used inside an @media block like @namespace rules.). In these cases
the @import rule is kept as in the original sheet and a WARNING is issued.
:param sheet:
in this given :class:`cssutils.css.CSSStyleSheet` all import rules are
resolved and added to a resulting *flat* sheet.
:param target:
A :class:`cssutils.css.CSSStyleSheet` object which will be the resulting
*flat* sheet if given
:returns: given `target` or a new :class:`cssutils.css.CSSStyleSheet` object
"""
if not target:
target = css.CSSStyleSheet()
#target.add(css.CSSComment(cssText=u'/* START %s */' % sheet.href))
for rule in sheet.cssRules:
if rule.type == rule.CHARSET_RULE:
pass
elif rule.type == rule.IMPORT_RULE:
log.info(u'Processing @import %r' % rule.href, neverraise=True)
if rule.styleSheet:
target.add(
css.CSSComment(cssText=u'/* START @import "%s" */' %
rule.href))
if rule.media.mediaText == 'all':
t = target
else:
log.info(u'Replacing @import media with @media: %s' %
rule.media.mediaText,
neverraise=True)
t = css.CSSMediaRule(rule.media.mediaText)
try:
resolveImports(rule.styleSheet, t)
except xml.dom.HierarchyRequestErr, e:
log.warn(u'Cannot resolve @import: %s' % e,
neverraise=True)
target.add(rule)
else:
if t != target:
target.add(t)
t.add(css.CSSComment(cssText=u'/* END "%s" */' %
rule.href))
else:
log.error(u'Cannot get referenced stylesheet %r' % rule.href,
neverraise=True)
target.add(rule)
else:
target.add(rule)
def resolveImports(sheet, target=None):
"""Recurcively combine all rules in given `sheet` into a `target` sheet.
@import rules which use media information are tried to be wrapped into
@media rules so keeping the media information. This may not work in
all instances (if e.g. an @import rule itself contains an @import rule
with different media infos or if it contains rules which may not be
used inside an @media block like @namespace rules.). In these cases
the @import rule is kept as in the original sheet and a WARNING is issued.
:param sheet:
in this given :class:`cssutils.css.CSSStyleSheet` all import rules are
resolved and added to a resulting *flat* sheet.
:param target:
A :class:`cssutils.css.CSSStyleSheet` object which will be the
resulting *flat* sheet if given
:returns: given `target` or a new :class:`cssutils.css.CSSStyleSheet`
object
"""
if not target:
target = css.CSSStyleSheet(href=sheet.href,
media=sheet.media,
title=sheet.title)
def getReplacer(targetbase):
"Return a replacer which uses base to return adjusted URLs"
basesch, baseloc, basepath, basequery, basefrag = urlparse.urlsplit(
targetbase)
basepath, basepathfilename = os.path.split(basepath)
def replacer(uri):
scheme, location, path, query, fragment = urlparse.urlsplit(uri)
if not scheme and not location and not path.startswith(u'/'):
# relative
path, filename = os.path.split(path)
combined = os.path.normpath(
os.path.join(basepath, path, filename))
return urllib.pathname2url(combined)
else:
# keep anything absolute
return uri
return replacer
for rule in sheet.cssRules:
if rule.type == rule.CHARSET_RULE:
pass
elif rule.type == rule.IMPORT_RULE:
log.info(u'Processing @import %r' % rule.href, neverraise=True)
if rule.hrefFound:
# add all rules of @import to current sheet
target.add(
css.CSSComment(cssText=u'/* START @import "%s" */' %
rule.href))
try:
# nested imports
importedSheet = resolveImports(rule.styleSheet)
except xml.dom.HierarchyRequestErr, e:
log.warn(
u'@import: Cannot resolve target, keeping rule: %s' %
e,
neverraise=True)
target.add(rule)
else:
# adjust relative URI references
log.info(u'@import: Adjusting paths for %r' % rule.href,
neverraise=True)
replaceUrls(importedSheet,
getReplacer(rule.href),
ignoreImportRules=True)
# might have to wrap rules in @media if media given
if rule.media.mediaText == u'all':
mediaproxy = None
else:
keepimport = False
for r in importedSheet:
# check if rules present which may not be
# combined with media
if r.type not in (r.COMMENT, r.STYLE_RULE,
r.IMPORT_RULE):
keepimport = True
break
if keepimport:
log.warn(u'Cannot combine imported sheet with'
u' given media as other rules then'
u' comments or stylerules found %r,'
u' keeping %r' % (r, rule.cssText),
neverraise=True)
target.add(rule)
continue
# wrap in @media if media is not `all`
log.info(u'@import: Wrapping some rules in @media '
u' to keep media: %s' % rule.media.mediaText,
neverraise=True)
mediaproxy = css.CSSMediaRule(rule.media.mediaText)
for r in importedSheet:
if mediaproxy:
mediaproxy.add(r)
else:
# add to top sheet directly but are difficult anyway
target.add(r)
if mediaproxy:
target.add(mediaproxy)
else:
# keep @import as it is
log.error(
u'Cannot get referenced stylesheet %r, keeping rule' %
rule.href,
neverraise=True)
target.add(rule)
else:
target.add(rule)