[web/views/formrenderer] do not use `cubicweb:target` attribute on form (closes #5534074)
The `cubicweb:target` is a flag indicating that the form data (with
file input) shall be posted inside an iframe - this is a well known
"ajax-like" workaround to post files with browsers that do not support
`FormData` (a.k.a IE<10).
The `cubicweb:target` was introduced when CW used the "xhtml strict"
doctype. Now that CW uses the "html5" doctype, this namespaced
attribute is no longer necessary and the iframe can be generated
directly.
Before this patch, CW inserts the `cubicweb:target` attribute in the
form DOM element (server side) and `setFormsTarget()` updates the
DOM with a new `<iframe>` element (client side).
Now, CW inserts the `<iframe>` DOM element directly (server side),
making `setFormsTarget` useless.
# copyright 2003-2010 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/>.
from logilab.common.deprecation import class_renamed, class_moved
from cubicweb.server import hook
SystemHook = class_renamed('SystemHook', hook.Hook)
Hook = class_moved(hook.Hook)