intergrate mako and genshi with django

###########
#common.py
###########
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured

import os

app_dirs = []
for app in settings.INSTALLED_APPS:
    i = app.rfind('.')
    if i == -1:
        m, a = app, None
    else:
        m, a = app[:i], app[i+1:]
    try:
        if a is None:
            mod = __import__(m, {}, {}, [])
        else:
            mod = getattr(__import__(m, {}, {}, [a]), a)
    except ImportError, e:
        raise ImproperlyConfigured, 'ImportError %s: %s' % (app, e.args[0])

    app_dirs.append(os.path.dirname(mod.__file__))




#################
#mako_django.py
#################
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
from django.http import HttpResponse
from django.template import TemplateDoesNotExist
from django.template.context import Context
from mako.lookup import TemplateLookup
from mako.template import Template
from mako.exceptions import TopLevelLookupException
import os

from common import app_dirs

'''
configurations:
    MAKO_TEMPLATE_DIRS:
        A tuple, specify the directories in which to find the mako templates, 
        just like TEMPLATE_DIRS .
        default value is ('mako_templates',)
    MAKO_MODULE_DIR:
        A string, if specified, all of the compiled template module files will be
        stored in this directory.
    MAKO_MODULENAME_CALLABLE:
        A callable, if MAKO_MODULE_DIR is not specified, this will be
        used to determine the filename of compiled template module file.
        See [http://www.makotemplates.org/trac/ticket/14]
        Default to the function `default_module_name`, which
        just appends '.py' to the template filename.
'''

app_template_dirs = []
for app_dir in app_dirs:
    template_dir = os.path.join(app_dir, 'mako_templates')
    if os.path.isdir(template_dir):
        app_template_dirs.append(template_dir)

template_dirs = getattr(settings, 'MAKO_TEMPLATE_DIRS', None) or ('mako_templates',)
template_dirs += tuple(app_template_dirs)

def default_module_name(filename, uri):
    '''
    Will store module files in the same directory as the corresponding template files.
    detail about module_name_callable, go to 
    http://www.makotemplates.org/trac/ticket/14
    '''
    return filename+'.py'

module_dir = getattr(settings, 'MAKO_MODULE_DIR', None)
if module_dir:
    lookup = TemplateLookup(directories=template_dirs,
            module_directory=module_dir)
else:
    module_name_callable = getattr(settings, 'MAKO_MODULENAME_CALLABLE', None)

    if callable(module_name_callable):
        lookup = TemplateLookup(directories=template_dirs,
                modulename_callable=module_name_callable)
    else:
        lookup = TemplateLookup(directories=template_dirs,
                modulename_callable=default_module_name)

def select_template(template_name_list):
    for template_name in template_name_list:
        try:
            return lookup.get_template(template_name)
        except TopLevelLookupException:
            pass

    raise TemplateDoesNotExist, 'mako templates: '+', '.join(template_name_list)

def get_template(template_name):
    try:
        return lookup.get_template(template_name)
    except TopLevelLookupException:
        raise TemplateDoesNotExist, 'mako templates: '+template_name

def render_to_response(template_name, dictionary=None,
        context_instance=None):
    if isinstance(template_name, (list, tuple)):
        template = select_template(template_name)
    else:
        template = get_template(template_name)

    dictionary = dictionary or {}
    if context_instance is None:
        context_instance = Context(dictionary)
    else:
        context_instance.update(dictionary)
    data = {}
    [data.update(d) for d in context_instance]
    return HttpResponse(template.render(**data))




##################
#genshi_django.py
##################
from django.conf import settings
from django.http import HttpResponse
from django.template import TemplateDoesNotExist
from django.template.context import Context
from genshi.template import MarkupTemplate, TemplateLoader
from genshi.template.loader import TemplateNotFound

import os
from common import app_dirs

'''
configuration:
    GENSHI_TEMPLATE_DIRS:
        specify directories in which to find the genshi template files.
        default value is ('genshi_templates',)
'''

app_template_dirs = []
for app_dir in app_dirs:
    template_dir = os.path.join(app_dir, 'genshi_templates')
    if os.path.isdir(template_dir):
        app_template_dirs.append(template_dir)

template_dirs = getattr(settings, 'GENSHI_TEMPLATE_DIRS', None) or ('genshi_templates',)
template_dirs += tuple(app_template_dirs)

loader = TemplateLoader(template_dirs, auto_reload=settings.DEBUG)

def select_template(template_name_list):
    for template_name in template_name_list:
        try:
            return loader.load(template_name)
        except TemplateNotFound:
            pass

    raise TemplateDoesNotExist, 'genshi templates: '+', '.join(template_name_list)

def get_template(template_name):
    try:
        return loader.load(template_name)
    except TemplateNotFound:
        raise TemplateDoesNotExist, 'genshi templates: '+template_name

def render_to_response(template_name, dictionary=None,
        context_instance=None):
    if isinstance(template_name, (list, tuple)):
        template = select_template(template_name)
    else:
        template = get_template(template_name)

    dictionary = dictionary or {}
    if context_instance is None:
        context_instance = Context(dictionary)
    else:
        context_instance.update(dictionary)
    data = {}
    [data.update(d) for d in context_instance]
    stream = template.generate(**data)
    return HttpResponse(stream.render('xhtml'))