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from .activatable import ActivatableTransformer
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class CSSHtmlHeaderTransformer(ActivatableTransformer):
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def __call__(self, nb, resources):
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"""Fetch and add css to the resource dict
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Fetch css from IPython adn Pygment to add at the beginning
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of the html files.
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Add this css in resources in the "inlining.css" key
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"""
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resources['inlining'] = {}
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resources['inlining']['css'] = self.header
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return nb, resources
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header = []
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def __init__(self, config=None, **kw):
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super(CSSHtmlHeaderTransformer, self).__init__(config=config, **kw)
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if self.enabled :
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self.regen_header()
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def regen_header(self):
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## lazy load asa this might not be use in many transformers
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import os
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from IPython.utils import path
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import io
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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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)
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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, 'fbm.css'),
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os.path.join(css, 'notebook.css'),
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os.path.join(css, 'renderedhtml.css'),
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os.path.join(css, 'style.min.css'),
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]:
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try:
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with io.open(sheet, encoding='utf-8') as f:
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s = f.read()
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header.append(s)
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except IOError:
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# new version of ipython with style.min.css, pass
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pass
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pygments_css = HtmlFormatter().get_style_defs('.highlight')
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header.append(pygments_css)
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self.header = header
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