|
|
"""Exporter for the notebook conversion pipeline.
|
|
|
|
|
|
This module defines Exporter, a highly configurable converter
|
|
|
that uses Jinja2 to export notebook files into different format.
|
|
|
|
|
|
You can register both pre-transformers that will act on the notebook format
|
|
|
before conversion and jinja filter that would then be available in the templates
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (c) 2013, the IPython Development Team.
|
|
|
#
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
#
|
|
|
# The full license is in the file COPYING.txt, distributed with this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
from __future__ import print_function, absolute_import
|
|
|
|
|
|
# Stdlib imports
|
|
|
import io
|
|
|
import os
|
|
|
import inspect
|
|
|
|
|
|
# IPython imports
|
|
|
from IPython.config.configurable import Configurable
|
|
|
from IPython.nbformat import current as nbformat
|
|
|
from IPython.utils.traitlets import MetaHasTraits, Unicode, List, Bool
|
|
|
from IPython.utils.text import indent
|
|
|
|
|
|
# other libs/dependencies
|
|
|
from jinja2 import Environment, FileSystemLoader
|
|
|
from markdown import markdown
|
|
|
|
|
|
# local import
|
|
|
import nbconvert.filters.strings
|
|
|
import nbconvert.filters.markdown
|
|
|
import nbconvert.filters.latex
|
|
|
import nbconvert.filters.datatypefilter
|
|
|
import nbconvert.filters.highlight
|
|
|
import nbconvert.filters.ansi
|
|
|
|
|
|
import nbconvert.transformers.extractfigure
|
|
|
import nbconvert.transformers.coalescestreams
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Globals and constants
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#Standard Jinja2 environment constants
|
|
|
TEMPLATE_PATH = "/../templates/"
|
|
|
TEMPLATE_SKELETON_PATH = "/../templates/skeleton/"
|
|
|
|
|
|
#Jinja2 extensions to load.
|
|
|
JINJA_EXTENSIONS = ['jinja2.ext.loopcontrols']
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Class
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class Exporter(Configurable):
|
|
|
|
|
|
template_file = Unicode(
|
|
|
'', config=True,
|
|
|
help="Name of the template file to use")
|
|
|
|
|
|
file_extension = Unicode(
|
|
|
'txt', config=True,
|
|
|
help="Extension of the file that should be written to disk"
|
|
|
)
|
|
|
|
|
|
#Extension that the template files use.
|
|
|
template_extension = ".tpl"
|
|
|
|
|
|
#Processors that process the input data prior to the export, set in the
|
|
|
#constructor for this class.
|
|
|
preprocessors = []
|
|
|
|
|
|
# Public Constructor #####################################################
|
|
|
|
|
|
def __init__(self, transformers=None, filters=None, config=None, **kw):
|
|
|
|
|
|
#Call the base class constructor
|
|
|
super(Exporter, self).__init__(config=config, **kw)
|
|
|
|
|
|
#Standard environment
|
|
|
self._init_environment()
|
|
|
|
|
|
#Add transformers
|
|
|
self._register_transformers()
|
|
|
|
|
|
#Add filters to the Jinja2 environment
|
|
|
self._register_filters()
|
|
|
|
|
|
#Load user transformers. Overwrite existing transformers if need be.
|
|
|
if not transformers is None:
|
|
|
for transformer in transformers:
|
|
|
self.register_transformer(transformer)
|
|
|
|
|
|
#Load user filters. Overwrite existing filters if need be.
|
|
|
if not filters is None:
|
|
|
for key, user_filter in filters.iteritems():
|
|
|
if issubclass(user_filter, MetaHasTraits):
|
|
|
self.environment.filters[key] = user_filter(config=config)
|
|
|
else:
|
|
|
self.environment.filters[key] = user_filter
|
|
|
|
|
|
# Public methods #########################################
|
|
|
|
|
|
def from_notebook_node(self, nb):
|
|
|
nb, resources = self._preprocess(nb)
|
|
|
|
|
|
#Load the template file.
|
|
|
self.template = self.environment.get_template(self.template_file+self.template_extension)
|
|
|
|
|
|
return self.template.render(nb=nb, resources=resources), resources
|
|
|
|
|
|
|
|
|
def from_filename(self, filename):
|
|
|
with io.open(filename) as f:
|
|
|
return self.from_notebook_node(nbformat.read(f, 'json'))
|
|
|
|
|
|
|
|
|
def from_file(self, file_stream):
|
|
|
return self.from_notebook_node(nbformat.read(file_stream, 'json'))
|
|
|
|
|
|
|
|
|
def register_transformer(self, transformer):
|
|
|
if inspect.isfunction(transformer):
|
|
|
self.preprocessors.append(transformer)
|
|
|
return transformer
|
|
|
elif isinstance(transformer, MetaHasTraits):
|
|
|
transformer_instance = transformer(config=self.config)
|
|
|
self.preprocessors.append(transformer_instance)
|
|
|
return transformer_instance
|
|
|
else:
|
|
|
transformer_instance = transformer()
|
|
|
self.preprocessors.append(transformer_instance)
|
|
|
return transformer_instance
|
|
|
|
|
|
|
|
|
def register_filter(self, name, filter):
|
|
|
if inspect.isfunction(filter):
|
|
|
self.environment.filters[name] = filter
|
|
|
elif isinstance(filter, MetaHasTraits):
|
|
|
self.environment.filters[name] = filter(config=self.config)
|
|
|
else:
|
|
|
self.environment.filters[name] = filter()
|
|
|
return self.environment.filters[name]
|
|
|
|
|
|
|
|
|
# Protected and Private methods #########################################
|
|
|
|
|
|
def _register_transformers(self):
|
|
|
self.register_transformer(nbconvert.transformers.coalescestreams.coalesce_streams)
|
|
|
|
|
|
#Remember the figure extraction transformer so it can be enabled and
|
|
|
#disabled easily later.
|
|
|
self.extract_figure_transformer = self.register_transformer(nbconvert.transformers.extractfigure.ExtractFigureTransformer)
|
|
|
|
|
|
|
|
|
def _register_filters(self):
|
|
|
self.register_filter('indent', indent)
|
|
|
self.register_filter('markdown', markdown)
|
|
|
self.register_filter('ansi2html', nbconvert.filters.ansi.ansi2html)
|
|
|
self.register_filter('filter_data_type', nbconvert.filters.datatypefilter.DataTypeFilter)
|
|
|
self.register_filter('get_lines', nbconvert.filters.strings.get_lines)
|
|
|
self.register_filter('highlight', nbconvert.filters.highlight.highlight)
|
|
|
self.register_filter('highlight2html', nbconvert.filters.highlight.highlight)
|
|
|
self.register_filter('highlight2latex', nbconvert.filters.highlight.highlight2latex)
|
|
|
self.register_filter('markdown2latex', nbconvert.filters.markdown.markdown2latex)
|
|
|
self.register_filter('markdown2rst', nbconvert.filters.markdown.markdown2rst)
|
|
|
self.register_filter('pycomment', nbconvert.filters.strings.python_comment)
|
|
|
self.register_filter('rm_ansi', nbconvert.filters.ansi.remove_ansi)
|
|
|
self.register_filter('rm_dollars', nbconvert.filters.strings.strip_dollars)
|
|
|
self.register_filter('rm_fake', nbconvert.filters.strings.rm_fake)
|
|
|
self.register_filter('rm_math_space', nbconvert.filters.latex.rm_math_space)
|
|
|
self.register_filter('wrap', nbconvert.filters.strings.wrap)
|
|
|
|
|
|
|
|
|
def _init_environment(self):
|
|
|
self.environment = Environment(
|
|
|
loader=FileSystemLoader([
|
|
|
os.path.dirname(os.path.realpath(__file__)) + TEMPLATE_PATH,
|
|
|
os.path.dirname(os.path.realpath(__file__)) + TEMPLATE_SKELETON_PATH,
|
|
|
]),
|
|
|
extensions=JINJA_EXTENSIONS
|
|
|
)
|
|
|
|
|
|
|
|
|
def _preprocess(self, nb):
|
|
|
|
|
|
#Dict of 'resources' that can be filled by the preprocessors.
|
|
|
resources = {}
|
|
|
|
|
|
#Run each transformer on the notebook. Carry the output along
|
|
|
#to each transformer
|
|
|
for transformer in self.preprocessors:
|
|
|
nb, resources = transformer(nb, resources)
|
|
|
return nb, resources
|
|
|
|
