"""
Exporter that exports Basic HTML.
"""

#-----------------------------------------------------------------------------
# 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 IPython.utils.traitlets import Unicode, List

from ..transformers.csshtmlheader import CSSHTMLHeaderTransformer

from .exporter import Exporter

#-----------------------------------------------------------------------------
# Classes
#-----------------------------------------------------------------------------

class BasicHTMLExporter(Exporter):
    """
    Exports a basic HTML document.  This exporter assists with the export of
    HTML.  Inherit from it if you are writing your own HTML template and need
    custom transformers/filters.  If you don't need custom transformers/
    filters, just change the 'template_file' config option.  
    """
    
    file_extension = Unicode(
        'html', config=True, 
        help="Extension of the file that should be written to disk"
        )

    template_file = Unicode(
            'basichtml', config=True,
            help="Name of the template file to use")

    default_transformers = List([transformers.coalesce_streams,
                                 transformers.ExtractFigureTransformer,
                                 transformers.CSSHTMLHeaderTransformer],
        config=True,
        help="""List of transformers available by default, by name, namespace, 
        instance, or type.""")