diff -r cc149f4def1e -r a2471775aef6 common/appobject.py
--- a/common/appobject.py	Tue Feb 17 21:50:41 2009 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,333 +0,0 @@
-"""Base class for dynamically loaded objects manipulated in the web interface
-
-:organization: Logilab
-:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
-:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
-"""
-__docformat__ = "restructuredtext en"
-
-from warnings import warn
-
-from mx.DateTime import now, oneSecond
-from simplejson import dumps
-
-from logilab.common.decorators import classproperty
-from logilab.common.deprecation import obsolete
-
-from rql.nodes import VariableRef, SubQuery
-from rql.stmts import Union, Select
-
-from cubicweb import Unauthorized
-from cubicweb.vregistry import VObject
-from cubicweb.selectors import yes
-from cubicweb.common.utils import UStringIO
-from cubicweb.common.uilib import html_escape, ustrftime
-from cubicweb.common.registerers import yes_registerer, priority_registerer
-
-
-
-class Cache(dict):    
-    def __init__(self):
-        super(Cache, self).__init__()
-        self.cache_creation_date = None
-        self.latest_cache_lookup = now()
-    
-CACHE_REGISTRY = {}
-
-class AppRsetObject(VObject):
-    """This is the base class for CubicWeb application objects
-    which are selected according to a request and result set.
-    
-    Classes are kept in the vregistry and instantiation is done at selection
-    time.
-    
-    At registration time, the following attributes are set on the class:
-    :vreg:
-      the application's registry
-    :schema:
-      the application's schema
-    :config:
-      the application's configuration
-
-    At instantiation time, the following attributes are set on the instance:
-    :req:
-      current request
-    :rset:
-      result set on which the object is applied
-    """
-
-    @classmethod
-    def registered(cls, vreg):
-        cls.vreg = vreg
-        cls.schema = vreg.schema
-        cls.config = vreg.config
-        cls.register_properties()
-        return cls
-
-    @classmethod
-    def selected(cls, *args, **kwargs):
-        """by default web app objects are usually instantiated on
-        selection according to a request, a result set, and optional
-        row and col
-        """
-        instance = cls(*args)
-        instance.row = kwargs.pop('row', None)
-        instance.col = kwargs.pop('col', None)
-        instance.selection_kwargs = kwargs
-        return instance
-
-    # Eproperties definition:
-    # key: id of the property (the actual EProperty key is build using
-    #      <registry name>.<obj id>.<property id>
-    # value: tuple (property type, vocabfunc, default value, property description)
-    #        possible types are those used by `logilab.common.configuration`
-    #
-    # notice that when it exists multiple objects with the same id (adaptation,
-    # overriding) only the first encountered definition is considered, so those
-    # objects can't try to have different default values for instance.
-    
-    property_defs = {}
-    
-    @classmethod
-    def register_properties(cls):
-        for propid, pdef in cls.property_defs.items():
-            pdef = pdef.copy() # may be shared
-            pdef['default'] = getattr(cls, propid, pdef['default'])
-            pdef['sitewide'] = getattr(cls, 'site_wide', pdef.get('sitewide'))
-            cls.vreg.register_property(cls.propkey(propid), **pdef)
-        
-    @classmethod
-    def propkey(cls, propid):
-        return '%s.%s.%s' % (cls.__registry__, cls.id, propid)
-
-    @classproperty
-    @obsolete('use __select__ and & or | operators')
-    def __selectors__(cls):
-        if isinstance(self.__select__, AndSelector):
-            return self.__select__.selectors
-        return self.__select__
-    
-    @classmethod
-    def __init__(self, req=None, rset=None):
-        super(AppRsetObject, self).__init__()
-        self.req = req
-        self.rset = rset
-
-    @property
-    def cursor(self): # XXX deprecate in favor of req.cursor?
-        msg = '.cursor is deprecated, use req.execute (or req.cursor if necessary)'
-        warn(msg, DeprecationWarning, stacklevel=2)
-        return self.req.cursor
-        
-    def get_cache(self, cachename):
-        """
-        NOTE: cachename should be dotted names as in :
-        - cubicweb.mycache
-        - cubes.blog.mycache 
-        - etc.
-        """
-        if cachename in CACHE_REGISTRY:
-            cache = CACHE_REGISTRY[cachename]
-        else:
-            cache = Cache()
-            CACHE_REGISTRY[cachename] = cache
-        _now = now()
-        if _now > cache.latest_cache_lookup + oneSecond:
-            ecache = self.req.execute('Any C,T WHERE C is ECache, C name %(name)s, C timestamp T', 
-                                      {'name':cachename}).get_entity(0,0)
-            cache.latest_cache_lookup = _now
-            if not ecache.valid(cache.cache_creation_date):
-                cache.empty()
-                cache.cache_creation_date = _now
-        return cache
-
-    def propval(self, propid):
-        assert self.req
-        return self.req.property_value(self.propkey(propid))
-
-    
-    def limited_rql(self):
-        """return a printable rql for the result set associated to the object,
-        with limit/offset correctly set according to maximum page size and
-        currently displayed page when necessary
-        """
-        # try to get page boundaries from the navigation component
-        # XXX we should probably not have a ref to this component here (eg in
-        #     cubicweb.common)
-        nav = self.vreg.select_component('navigation', self.req, self.rset)
-        if nav:
-            start, stop = nav.page_boundaries()
-            rql = self._limit_offset_rql(stop - start, start)
-        # result set may have be limited manually in which case navigation won't
-        # apply
-        elif self.rset.limited:
-            rql = self._limit_offset_rql(*self.rset.limited)
-        # navigation component doesn't apply and rset has not been limited, no
-        # need to limit query
-        else:
-            rql = self.rset.printable_rql()
-        return rql
-    
-    def _limit_offset_rql(self, limit, offset):
-        rqlst = self.rset.syntax_tree()
-        if len(rqlst.children) == 1:
-            select = rqlst.children[0]
-            olimit, ooffset = select.limit, select.offset
-            select.limit, select.offset = limit, offset
-            rql = rqlst.as_string(kwargs=self.rset.args)
-            # restore original limit/offset
-            select.limit, select.offset = olimit, ooffset
-        else:
-            newselect = Select()
-            newselect.limit = limit
-            newselect.offset = offset
-            aliases = [VariableRef(newselect.get_variable(vref.name, i))
-                       for i, vref in enumerate(rqlst.selection)]
-            newselect.set_with([SubQuery(aliases, rqlst)], check=False)
-            newunion = Union()
-            newunion.append(newselect)
-            rql = rqlst.as_string(kwargs=self.rset.args)
-            rqlst.parent = None
-        return rql
-    
-    # url generation methods ##################################################
-    
-    controller = 'view'
-    
-    def build_url(self, method=None, **kwargs):
-        """return an absolute URL using params dictionary key/values as URL
-        parameters. Values are automatically URL quoted, and the
-        publishing method to use may be specified or will be guessed.
-        """
-        # XXX I (adim) think that if method is passed explicitly, we should
-        #     not try to process it and directly call req.build_url()
-        if method is None:
-            method = self.controller
-            if method == 'view' and self.req.from_controller() == 'view' and \
-                   not '_restpath' in kwargs:
-                method = self.req.relative_path(includeparams=False) or 'view'
-        return self.req.build_url(method, **kwargs)
-
-    # various resources accessors #############################################
-
-    def etype_rset(self, etype, size=1):
-        """return a fake result set for a particular entity type"""
-        msg = '.etype_rset is deprecated, use req.etype_rset'
-        warn(msg, DeprecationWarning, stacklevel=2)
-        return self.req.etype_rset(etype, size=1)
-
-    def eid_rset(self, eid, etype=None):
-        """return a result set for the given eid"""
-        msg = '.eid_rset is deprecated, use req.eid_rset'
-        warn(msg, DeprecationWarning, stacklevel=2)
-        return self.req.eid_rset(eid, etype)
-    
-    def entity(self, row, col=0):
-        """short cut to get an entity instance for a particular row/column
-        (col default to 0)
-        """
-        return self.rset.get_entity(row, col)
-    
-    def complete_entity(self, row, col=0, skip_bytes=True):
-        """short cut to get an completed entity instance for a particular
-        row (all instance's attributes have been fetched)
-        """
-        entity = self.entity(row, col)
-        entity.complete(skip_bytes=skip_bytes)
-        return entity
-
-    def user_rql_callback(self, args, msg=None):
-        """register a user callback to execute some rql query and return an url
-        to call it ready to be inserted in html
-        """
-        def rqlexec(req, rql, args=None, key=None):
-            req.execute(rql, args, key)
-        return self.user_callback(rqlexec, args, msg)
-        
-    def user_callback(self, cb, args, msg=None, nonify=False):
-        """register the given user callback and return an url to call it ready to be
-        inserted in html
-        """
-        self.req.add_js('cubicweb.ajax.js')
-        if nonify:
-            # XXX < 2.48.3 bw compat
-            warn('nonify argument is deprecated', DeprecationWarning, stacklevel=2)
-            _cb = cb
-            def cb(*args):
-                _cb(*args)
-        cbname = self.req.register_onetime_callback(cb, *args)
-        msg = dumps(msg or '') 
-        return "javascript:userCallbackThenReloadPage('%s', %s)" % (
-            cbname, msg)
-
-    # formating methods #######################################################
-
-    def tal_render(self, template, variables):
-        """render a precompiled page template with variables in the given
-        dictionary as context
-        """
-        from cubicweb.common.tal import CubicWebContext
-        context = CubicWebContext()
-        context.update({'self': self, 'rset': self.rset, '_' : self.req._,
-                        'req': self.req, 'user': self.req.user})
-        context.update(variables)
-        output = UStringIO()
-        template.expand(context, output)
-        return output.getvalue()
-
-    def format_date(self, date, date_format=None, time=False):
-        """return a string for a mx date time according to application's
-        configuration
-        """
-        if date:
-            if date_format is None:
-                if time:
-                    date_format = self.req.property_value('ui.datetime-format')
-                else:
-                    date_format = self.req.property_value('ui.date-format')
-            return ustrftime(date, date_format)
-        return u''
-
-    def format_time(self, time):
-        """return a string for a mx date time according to application's
-        configuration
-        """
-        if time:
-            return ustrftime(time, self.req.property_value('ui.time-format'))
-        return u''
-
-    def format_float(self, num):
-        """return a string for floating point number according to application's
-        configuration
-        """
-        if num:
-            return self.req.property_value('ui.float-format') % num
-        return u''
-    
-    # security related methods ################################################
-    
-    def ensure_ro_rql(self, rql):
-        """raise an exception if the given rql is not a select query"""
-        first = rql.split(' ', 1)[0].lower()
-        if first in ('insert', 'set', 'delete'):
-            raise Unauthorized(self.req._('only select queries are authorized'))
-
-        
-class AppObject(AppRsetObject):
-    """base class for application objects which are not selected
-    according to a result set, only by their identifier.
-    
-    Those objects may not have req, rset and cursor set.
-    """
-    
-    @classmethod
-    def selected(cls, *args, **kwargs):
-        """by default web app objects are usually instantiated on
-        selection
-        """
-        return cls(*args, **kwargs)
-
-    def __init__(self, req=None, rset=None, **kwargs):
-        self.req = req
-        self.rset = rset
-        self.__dict__.update(kwargs)