web/propertysheet.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Thu, 17 Jun 2010 15:15:52 +0200
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parent 5467 57372dbfd114
child 5938 9cb13d1b2ce4
permissions -rw-r--r--
backport stable
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# copyright 2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""property sheets allowing configuration of the web ui"""
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__docformat__ = "restructuredtext en"
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import re
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import os
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import os.path as osp
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class PropertySheet(dict):
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    def __init__(self, cache_directory, **context):
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        self._cache_directory = cache_directory
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        self.context = context
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        self.reset()
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        context['sheet'] = self
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        self._percent_rgx = re.compile('%(?!\()')
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    def reset(self):
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        self.clear()
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        self._ordered_propfiles = []
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        self._propfile_mtime = {}
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        self._sourcefile_mtime = {}
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        self._cache = {}
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    def load(self, fpath):
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        scriptglobals = self.context.copy()
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        scriptglobals['__file__'] = fpath
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        execfile(fpath, scriptglobals, self)
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        self._propfile_mtime[fpath] = os.stat(fpath)[-2]
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        self._ordered_propfiles.append(fpath)
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    def need_reload(self):
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        for rid, (adirectory, rdirectory, mtime) in self._cache.items():
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            if os.stat(osp.join(rdirectory, rid))[-2] > mtime:
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                del self._cache[rid]
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        for fpath, mtime in self._propfile_mtime.iteritems():
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            if os.stat(fpath)[-2] > mtime:
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                return True
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        return False
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    def reload(self):
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        ordered_files = self._ordered_propfiles
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        self.reset()
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        for fpath in ordered_files:
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            self.load(fpath)
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    def reload_if_needed(self):
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        if self.need_reload():
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            self.reload()
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    def process_resource(self, rdirectory, rid):
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        try:
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            return self._cache[rid][0]
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        except KeyError:
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            cachefile = osp.join(self._cache_directory, rid)
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            self.debug('caching processed %s/%s into %s',
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                       rdirectory, rid, cachefile)
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            rcachedir = osp.dirname(cachefile)
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            if not osp.exists(rcachedir):
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                os.makedirs(rcachedir)
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            sourcefile = osp.join(rdirectory, rid)
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            content = file(sourcefile).read()
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            # XXX replace % not followed by a paren by %% to avoid having to do
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            # this in the source css file ?
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            try:
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                content = self.compile(content)
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            except ValueError, ex:
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                self.error("can't process %s/%s: %s", rdirectory, rid, ex)
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                adirectory = rdirectory
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            else:
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                stream = file(cachefile, 'w')
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                stream.write(content)
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                stream.close()
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                adirectory = self._cache_directory
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            self._cache[rid] = (adirectory, rdirectory, os.stat(sourcefile)[-2])
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            return adirectory
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    def compile(self, content):
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        return self._percent_rgx.sub('%%', content) % self
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from cubicweb.web import LOGGER
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from logilab.common.logging_ext import set_log_methods
4467ed43d97d [web] use uiprops value to compile css transparently, handlig cache and reloading in debug mode
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 5444
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set_log_methods(PropertySheet, LOGGER)