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from __future__ import absolute_import
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from .html import ConverterHTML
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from .utils import text_cell
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from .utils import highlight, coalesce_streams
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from IPython.utils import path
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from markdown import markdown
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import os
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import io
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import itertools
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class ConverterReveal(ConverterHTML):
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"""
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Convert a ipython notebook to a html slideshow
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based in reveal.js library.
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"""
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@text_cell
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def render_heading(self, cell):
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marker = cell.level
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return [self.meta2str(cell.metadata),
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u'<h{1}>\n {0}\n</h{1}>'.format(cell.source, marker)]
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def render_code(self, cell):
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if not cell.input:
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return []
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lines = []
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meta_code = self.meta2str(cell.metadata)
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lines.extend([meta_code])
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lines.extend(['<div class="cell border-box-sizing code_cell vbox">'])
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lines.append('<div class="input hbox">')
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n = self._get_prompt_number(cell)
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lines.append(
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'<div class="prompt input_prompt">In [%s]:</div>' % n
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)
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lines.append('<div class="input_area box-flex1">')
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lines.append(highlight(cell.input))
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lines.append('</div>') # input_area
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lines.append('</div>') # input
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if cell.outputs:
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lines.append('<div class="vbox output_wrapper">')
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lines.append('<div class="output vbox">')
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for output in coalesce_streams(cell.outputs):
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conv_fn = self.dispatch(output.output_type)
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lines.extend(conv_fn(output))
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lines.append('</div>') # output
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lines.append('</div>') # output_wrapper
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lines.append('</div>') # cell
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return lines
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@text_cell
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def render_markdown(self, cell):
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return [self.meta2str(cell.metadata), markdown(cell.source)]
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def render_raw(self, cell):
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if self.raw_as_verbatim:
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return [self.in_tag('pre', self.meta2str(cell.metadata)),
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self.in_tag('pre', cell.source)]
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else:
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return [self.meta2str(cell.metadata), cell.source]
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def meta2str(self, meta):
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"transform metadata dict (containing slides delimiters) to string "
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try:
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meta_tuple = meta[u'slideshow'].items()
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except KeyError as e: # if there is not slideshow metadata
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meta_tuple = [(u'slide_type', u'untouched')]
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meta_list = [[x + ' = ' + unicode(y)] for x, y in meta_tuple]
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return u'\n'.join(list(itertools.chain(*meta_list)))
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def convert(self, cell_separator='\n'):
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"""
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Specific method to converts notebook to a string representation.
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Parameters
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----------
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cell_separator : string
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Character or string to join cells with. Default is "\n"
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Returns
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-------
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out : string
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"""
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lines = []
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lines.extend(self.optional_header())
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begin = ['<div class="reveal"><div class="slides">']
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lines.extend(begin)
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slides_list = self.build_slides()
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lines.extend(slides_list)
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end = ['</div></div>']
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lines.extend(end)
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lines.extend(self.optional_footer())
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return u'\n'.join(lines)
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def clean_text(self, cell_separator='\n'):
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"clean and reorganize the text list to be slided"
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text = self.main_body(cell_separator)
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self.delim = [u'slide_type = untouched',
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u'slide_type = -',
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u'slide_type = slide',
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u'slide_type = subslide',
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u'slide_type = fragment',
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u'slide_type = notes',
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u'slide_type = skip'] # keep this one the last
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text_cell_render = \
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u'<div class="text_cell_render border-box-sizing rendered_html">'
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for i, j in enumerate(text):
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if j in self.delim and text[i - 1] == text_cell_render:
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if j == self.delim[0]:
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text[i - 1] = self.delim[0]
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elif j == self.delim[1]:
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text[i - 1] = self.delim[1]
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elif j == self.delim[2]:
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text[i - 1] = self.delim[2]
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elif j == self.delim[3]:
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text[i - 1] = self.delim[3]
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elif j == self.delim[4]:
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text[i - 1] = self.delim[4]
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elif j == self.delim[5]:
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text[i - 1] = self.delim[5]
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else:
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text[i - 1] = self.delim[6]
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text[i] = text_cell_render
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return text
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def build_slides(self):
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"build the slides structure from text list and delimiters"
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text = self.clean_text()
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left = '<section>'
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right = '</section>'
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notes_start = '<aside class="notes">'
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notes_end = '</aside>'
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#encapsulation of skipped cells
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for i, j in enumerate(text):
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if j == u'slide_type = skip':
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text.pop(i)
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text[i] = text[i][:4] + \
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' style=display:none' + text[i][4:]
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#encapsulation of notes cells
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for i, j in enumerate(text):
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if j == u'slide_type = notes':
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text.pop(i)
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temp_list = []
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while not text[i] in self.delim[:6]:
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temp_list.append(text.pop(i))
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else:
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temp_list.insert(0, notes_start)
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temp_list.append(notes_end)
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text[i:i] = temp_list
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# elimination of none names
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for i, j in enumerate(text):
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if j in [u'slide_type = untouched', u'slide_type = -']:
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text.pop(i)
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#generation of slides as a list of list
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slides = [list(x[1]) for x in itertools.groupby(text,
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lambda x: x == u'slide_type = slide') if not x[0]]
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for slide in slides:
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slide.insert(0, left)
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slide.append(right)
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# encapsulation of each fragment
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for i, j in enumerate(slide):
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if j == u'slide_type = fragment':
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slide.pop(i)
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slide[i] = slide[i][:4] + \
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' class="fragment"' + slide[i][4:]
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# encapsulation of each nested slide
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if u'slide_type = subslide' in slide:
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slide.insert(0, left)
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slide.append(right)
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for i, j in enumerate(slide):
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if j == u'slide_type = subslide':
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slide[i] = right + left
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return list(itertools.chain(*slides))
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def render(self):
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"read, convert, and save self.infile"
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if not hasattr(self, 'nb'):
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self.read()
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self.output = self.convert()
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assert(type(self.output) == unicode)
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return self.save()
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def save(self, outfile=None, encoding=None):
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"read and parse notebook into self.nb"
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if outfile is None:
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outfile = self.outbase + '_slides.' + 'html'
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if encoding is None:
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encoding = self.default_encoding
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with io.open(outfile, 'w', encoding=encoding) as f:
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f.write(self.output)
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return os.path.abspath(outfile)
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def header_body(self):
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"return the body of the header as a list of strings"
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from pygments.formatters import HtmlFormatter
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header = []
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static = os.path.join(path.get_ipython_package_dir(),
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'frontend', 'html', 'notebook', 'static',)
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here = os.path.split(os.path.realpath(__file__))[0]
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css = os.path.join(static, 'css')
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for sheet in [
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# do we need jquery and prettify?
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# os.path.join(static, 'jquery', 'css', 'themes', 'base',
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# 'jquery-ui.min.css'),
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# os.path.join(static, 'prettify', 'prettify.css'),
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os.path.join(css, 'boilerplate.css'),
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os.path.join(css, 'style.min.css'),
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# our overrides:
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os.path.join(here, '..', 'css', 'reveal_html.css'),
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]:
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header.extend(self._stylesheet(sheet))
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# pygments css
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pygments_css = HtmlFormatter().get_style_defs('.highlight')
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header.extend(['<meta charset="UTF-8">'])
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header.extend(self.in_tag('style', pygments_css,
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dict(type='"text/css"')))
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return header
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def template_read(self, templ):
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"read the reveal_template.html"
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here = os.path.split(os.path.realpath(__file__))[0]
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reveal_template = os.path.join(here, '..', 'templates',
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templ)
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with io.open(reveal_template, 'r', encoding='utf-8') as f:
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template = f.readlines()
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template = [s.strip() for s in template]
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return template
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def template_split(self):
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"split the reveal_template.html in header and footer lists"
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temp = self.template_read('reveal_base.html')
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splitted_temp = [list(x[1]) for x in itertools.groupby(temp,
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lambda x: x == u'%slides%') if not x[0]]
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return splitted_temp
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def optional_header(self):
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optional_header_body = self.template_split()
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return ['<!DOCTYPE html>', '<html>', '<head>'] + \
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optional_header_body[0] + self.header_body() + \
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['</head>', '<body>']
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def optional_footer(self):
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optional_footer_body = self.template_split()
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return optional_footer_body[1] + ['</body>', '</html>']
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