mttransforms.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Tue, 25 Jun 2013 10:59:01 +0200
changeset 9070 4a803380f718
parent 7577 9892937d9041
child 10012 8c2c6fdd8d56
permissions -rw-r--r--
PARTIAL: Using the repoapi in test Test now use the repoapi.ClientConnection to access the repo. This is very big change. The current method to access the repo are kept for backward compatibility. The new methods will be introduced much later. The TestCase keep a ClientConnection To an admin session for the whole test. This changeset does not makes all tests pass without the next one that change set htt without the next one that change the http stack

# 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/>.
"""mime type transformation engine for cubicweb, based on mtconverter"""

__docformat__ = "restructuredtext en"

from logilab import mtconverter

from logilab.mtconverter.engine import TransformEngine
from logilab.mtconverter.transform import Transform
from logilab.mtconverter import (register_base_transforms,
                                 register_pil_transforms,
                                 register_pygments_transforms)

from cubicweb.utils import UStringIO
from cubicweb.uilib import rest_publish, html_publish

HTML_MIMETYPES = ('text/html', 'text/xhtml', 'application/xhtml+xml')

# CubicWeb specific transformations

class rest_to_html(Transform):
    inputs = ('text/rest', 'text/x-rst')
    output = 'text/html'
    def _convert(self, trdata):
        return rest_publish(trdata.appobject, trdata.decode())

class html_to_html(Transform):
    inputs = HTML_MIMETYPES
    output = 'text/html'
    def _convert(self, trdata):
        return html_publish(trdata.appobject, trdata.data)


# Instantiate and configure the transformation engine

mtconverter.UNICODE_POLICY = 'replace'

ENGINE = TransformEngine()
ENGINE.add_transform(rest_to_html())
ENGINE.add_transform(html_to_html())

try:
    from cubicweb.ext.tal import CubicWebContext, compile_template
except ImportError:
    HAS_TAL = False
    from cubicweb import schema
    schema.NEED_PERM_FORMATS.remove('text/cubicweb-page-template')

else:
    HAS_TAL = True

    class ept_to_html(Transform):
        inputs = ('text/cubicweb-page-template',)
        output = 'text/html'
        output_encoding = 'utf-8'
        def _convert(self, trdata):
            context = CubicWebContext()
            appobject = trdata.appobject
            context.update({'self': appobject, 'rset': appobject.cw_rset,
                            'req': appobject._cw,
                            '_' : appobject._cw._,
                            'user': appobject._cw.user})
            output = UStringIO()
            template = compile_template(trdata.encode(self.output_encoding))
            template.expand(context, output)
            return output.getvalue()

    ENGINE.add_transform(ept_to_html())

if register_pil_transforms(ENGINE, verb=False):
    HAS_PIL_TRANSFORMS = True
else:
    HAS_PIL_TRANSFORMS = False

try:
    from logilab.mtconverter.transforms import pygmentstransforms
    for mt in ('text/plain',) + HTML_MIMETYPES:
        try:
            pygmentstransforms.mimetypes.remove(mt)
        except ValueError:
            continue
    register_pygments_transforms(ENGINE, verb=False)

    def patch_convert(cls):
        def _convert(self, trdata, origconvert=cls._convert):
            add_css = getattr(trdata.appobject._cw, 'add_css', None)
            if add_css is not None:
                # session has no add_css, only http request
                add_css('pygments.css')
            return origconvert(self, trdata)
        cls._convert = _convert
    patch_convert(pygmentstransforms.PygmentsHTMLTransform)

    HAS_PYGMENTS_TRANSFORMS = True
except ImportError:
    HAS_PYGMENTS_TRANSFORMS = False

register_base_transforms(ENGINE, verb=False)