Fixed test and add fragments to the list of resets.

IPython/nbconvert/preprocessors/revealhelp.py

@@ -1,75 +1,75 b''
 """Module that pre-processes the notebook for export via Reveal.
 """
 #-----------------------------------------------------------------------------
 # 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 .base import Preprocessor
 from IPython.utils.traitlets import Unicode
 
 #-----------------------------------------------------------------------------
 # Classes and functions
 #-----------------------------------------------------------------------------
 
 class RevealHelpPreprocessor(Preprocessor):
 
     url_prefix = Unicode('reveal.js', config=True,
                          help="""The URL prefix for reveal.js.
                          This can be a a relative URL for a local copy of reveal.js,
                          or point to a CDN.
                          
                          For speaker notes to work, a local reveal.js prefix must be used.
                          """
     )
 
     def preprocess(self, nb, resources):
         """
         Called once to 'preprocess' contents of the notebook.
 
         Parameters
         ----------
         nb : NotebookNode
             Notebook being converted
         resources : dictionary
             Additional resources used in the conversion process.  Allows
             preprocessors to pass variables into the Jinja engine.
         """
 
         for worksheet in nb.worksheets:
             for index, cell in enumerate(worksheet.cells):
 
                 #Make sure the cell has slideshow metadata.
                 cell.metadata.slide_type = cell.get('metadata', {}).get('slideshow', {}).get('slide_type', '-')
 
                 #Get the slide type. If type is start of subslide or slide,
                 #end the last subslide/slide.
                 if cell.metadata.slide_type in ['slide']:
                     worksheet.cells[index - 1].metadata.slide_helper = 'slide_end'
                 if cell.metadata.slide_type in ['subslide']:
                     worksheet.cells[index - 1].metadata.slide_helper = 'subslide_end'
                 #Prevent the rendering of "do nothing" cells before fragments
                 #Group fragments passing frag_number to the data-fragment-index
                 if cell.metadata.slide_type in ['fragment']:
                     worksheet.cells[index].metadata.frag_number = index
                     i = 1
                     while i < len(worksheet.cells) - index:
                         worksheet.cells[index + i].metadata.frag_helper = 'fragment_end'
                         worksheet.cells[index + i].metadata.frag_number = index
                         i += 1
                 #Restart the slide_helper when the cell status is changed
-                #to "do nothing".
-                if cell.metadata.slide_type in ['-']:
+                #to other types.
+                if cell.metadata.slide_type in ['-', 'skip', 'notes', 'fragment']:
                     worksheet.cells[index - 1].metadata.slide_helper = '-'
 
         if not isinstance(resources['reveal'], dict):
             resources['reveal'] = {}
         resources['reveal']['url_prefix'] = self.url_prefix
         return nb, resources

IPython/nbconvert/preprocessors/tests/test_revealhelp.py

@@ -1,93 +1,94 b''
 """
 Module with tests for the revealhelp preprocessor
 """
 
 #-----------------------------------------------------------------------------
 # 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.nbformat import current as nbformat
 
 from .base import PreprocessorTestsBase
 from ..revealhelp import RevealHelpPreprocessor
 
 
 #-----------------------------------------------------------------------------
 # Class
 #-----------------------------------------------------------------------------
 
 class Testrevealhelp(PreprocessorTestsBase):
     """Contains test functions for revealhelp.py"""
 
     def build_notebook(self):
-        """Build a reveal slides notebook in memory for use with tests.  
+        """Build a reveal slides notebook in memory for use with tests.
         Overrides base in PreprocessorTestsBase"""
 
         outputs = [nbformat.new_output(output_type="stream", stream="stdout", output_text="a")]
-        
+
         slide_metadata = {'slideshow' : {'slide_type': 'slide'}}
         subslide_metadata = {'slideshow' : {'slide_type': 'subslide'}}
 
         cells=[nbformat.new_code_cell(input="", prompt_number=1, outputs=outputs),
                nbformat.new_text_cell('markdown', source="", metadata=slide_metadata),
                nbformat.new_code_cell(input="", prompt_number=2, outputs=outputs),
                nbformat.new_text_cell('markdown', source="", metadata=slide_metadata),
                nbformat.new_text_cell('markdown', source="", metadata=subslide_metadata)]
         worksheets = [nbformat.new_worksheet(name="worksheet1", cells=cells)]
 
         return nbformat.new_notebook(name="notebook1", worksheets=worksheets)
 
 
     def build_preprocessor(self):
         """Make an instance of a preprocessor"""
         preprocessor = RevealHelpPreprocessor()
         preprocessor.enabled = True
         return preprocessor
 
 
     def test_constructor(self):
         """Can a RevealHelpPreprocessor be constructed?"""
         self.build_preprocessor()
-    
+
 
     def test_reveal_attribute(self):
         """Make sure the reveal url_prefix resources is set"""
         nb = self.build_notebook()
         res = self.build_resources()
         preprocessor = self.build_preprocessor()
         nb, res = preprocessor(nb, res)
         assert 'reveal' in res
         assert  'url_prefix' in res['reveal']
 
 
     def test_reveal_output(self):
         """Make sure that the reveal preprocessor """
         nb = self.build_notebook()
         res = self.build_resources()
         preprocessor = self.build_preprocessor()
         nb, res = preprocessor(nb, res)
         cells = nb.worksheets[0].cells
         
         # Make sure correct metadata tags are available on every cell.
         for cell in cells:
             assert 'slide_type' in cell.metadata
 
         # Make sure slide end is only applied to the cells preceeding slide 
         # cells.
-        assert 'slide_helper' not in cells[1].metadata
+        assert 'slide_helper' in cells[1].metadata
+        self.assertEqual(cells[1].metadata['slide_helper'], '-')
 
         # Verify 'slide-end'
         assert 'slide_helper' in cells[0].metadata
         self.assertEqual(cells[0].metadata['slide_helper'], 'slide_end')
         assert 'slide_helper' in cells[2].metadata
         self.assertEqual(cells[2].metadata['slide_helper'], 'slide_end')
         assert 'slide_helper' in cells[3].metadata
         self.assertEqual(cells[3].metadata['slide_helper'], 'subslide_end')