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"""Module that pre-processes the notebook for export via Reveal.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (c) 2013, the IPython Development Team.
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#
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# Distributed under the terms of the Modified BSD License.
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#
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# The full license is in the file COPYING.txt, distributed with this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from .base import ConfigurableTransformer
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#-----------------------------------------------------------------------------
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# Classes and functions
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#-----------------------------------------------------------------------------
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class RevealHelpTransformer(ConfigurableTransformer):
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def __call__(self, nb, resources):
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"""
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Called once to 'transform' contents of the notebook.
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Parameters
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----------
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nb : NotebookNode
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Notebook being converted
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resources : dictionary
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Additional resources used in the conversion process. Allows
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transformers to pass variables into the Jinja engine.
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"""
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for worksheet in nb.worksheets :
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for i, cell in enumerate(worksheet.cells):
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#Make sure the cell has metadata.
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if not cell.get('metadata', None):
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break
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#Get the slide type. If type is start of subslide or slide,
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#end the last subslide/slide.
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cell.metadata.slide_type = cell.metadata.get('slideshow', {}).get('slide_type', None)
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if cell.metadata.slide_type is None:
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cell.metadata.slide_type = '-'
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if cell.metadata.slide_type in ['slide']:
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worksheet.cells[i - 1].metadata.slide_helper = 'slide_end'
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if cell.metadata.slide_type in ['subslide']:
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worksheet.cells[i - 1].metadata.slide_helper = 'subslide_end'
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return nb, resources
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