--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/web/propertysheet.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,121 @@
+# copyright 2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
+#
+# This file is part of CubicWeb.
+#
+# CubicWeb is free software: you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation, either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
+"""property sheets allowing configuration of the web ui"""
+
+__docformat__ = "restructuredtext en"
+
+import re
+import os
+import os.path as osp
+import tempfile
+
+
+TYPE_CHECKS = [('STYLESHEETS', list), ('JAVASCRIPTS', list),
+               ('STYLESHEETS_IE', list), ('STYLESHEETS_PRINT', list),
+               ]
+
+class lazystr(object):
+    def __init__(self, string, context):
+        self.string = string
+        self.context = context
+    def __str__(self):
+        return self.string % self.context
+
+
+class PropertySheet(dict):
+    def __init__(self, cache_directory, **context):
+        self._cache_directory = cache_directory
+        self.context = context
+        self.reset()
+        context['sheet'] = self
+        context['lazystr'] = self.lazystr
+        self._percent_rgx = re.compile('%(?!\()')
+
+    def lazystr(self, str):
+        return lazystr(str, self)
+
+    def reset(self):
+        self.clear()
+        self._ordered_propfiles = []
+        self._propfile_mtime = {}
+
+    def load(self, fpath):
+        scriptglobals = self.context.copy()
+        scriptglobals['__file__'] = fpath
+        with open(fpath, 'rb') as fobj:
+            code = compile(fobj.read(), fpath, 'exec')
+        exec(code, scriptglobals, self)
+        for name, type in TYPE_CHECKS:
+            if name in self:
+                if not isinstance(self[name], type):
+                    msg = "Configuration error: %s.%s should be a %s" % (fpath, name, type)
+                    raise Exception(msg)
+        self._propfile_mtime[fpath] = os.stat(fpath).st_mtime
+        self._ordered_propfiles.append(fpath)
+
+    def need_reload(self):
+        for fpath, mtime in self._propfile_mtime.items():
+            if os.stat(fpath).st_mtime > mtime:
+                return True
+        return False
+
+    def reload(self):
+        ordered_files = self._ordered_propfiles
+        self.reset()
+        for fpath in ordered_files:
+            self.load(fpath)
+
+    def reload_if_needed(self):
+        if self.need_reload():
+            self.reload()
+
+    def process_resource(self, rdirectory, rid):
+        cachefile = osp.join(self._cache_directory, rid)
+        self.debug('processing %s/%s into %s',
+                   rdirectory, rid, cachefile)
+        rcachedir = osp.dirname(cachefile)
+        if not osp.exists(rcachedir):
+            os.makedirs(rcachedir)
+        sourcefile = osp.join(rdirectory, rid)
+        with open(sourcefile) as f:
+            content = f.read()
+        # XXX replace % not followed by a paren by %% to avoid having to do
+        # this in the source css file ?
+        try:
+            content = self.compile(content)
+        except ValueError as ex:
+            self.error("can't process %s/%s: %s", rdirectory, rid, ex)
+            adirectory = rdirectory
+        else:
+            tmpfd, tmpfile = tempfile.mkstemp(dir=rcachedir, prefix=osp.basename(cachefile))
+            with os.fdopen(tmpfd, 'w') as stream:
+                stream.write(content)
+            os.rename(tmpfile, cachefile)
+            adirectory = self._cache_directory
+        return adirectory
+
+    def compile(self, content):
+        return self._percent_rgx.sub('%%', content) % self
+
+    # these are overridden by set_log_methods below
+    # only defining here to prevent pylint from complaining
+    info = warning = error = critical = exception = debug = lambda msg,*a,**kw: None
+
+from cubicweb.web import LOGGER
+from logilab.common.logging_ext import set_log_methods
+set_log_methods(PropertySheet, LOGGER)