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"""Utility function for installing MathJax javascript library into
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the notebook's 'static' directory, for offline use.
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Authors:
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* Min RK
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2008-2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import os
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import shutil
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import urllib2
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import tempfile
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import tarfile
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from IPython.frontend.html import notebook as nbmod
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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def install_mathjax(tag='v1.1', replace=False):
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"""Download and install MathJax for offline use.
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This will install mathjax to the 'static' dir in the IPython notebook
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package, so it will fail if the caller does not have write access
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to that location.
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MathJax is a ~15MB download, and ~150MB installed.
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Parameters
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----------
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replace : bool [False]
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Whether to remove and replace an existing install.
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tag : str ['v1.1']
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Which tag to download. Default is 'v1.1', the current stable release,
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but alternatives include 'v1.1a' and 'master'.
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"""
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mathjax_url = "https://github.com/mathjax/MathJax/tarball/%s"%tag
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nbdir = os.path.dirname(os.path.abspath(nbmod.__file__))
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static = os.path.join(nbdir, 'static')
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dest = os.path.join(static, 'mathjax')
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# check for existence and permissions
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if not os.access(static, os.W_OK):
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raise IOError("Need have write access to %s"%static)
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if os.path.exists(dest):
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if replace:
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if not os.access(dest, os.W_OK):
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raise IOError("Need have write access to %s"%dest)
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print "removing previous MathJax install"
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shutil.rmtree(dest)
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else:
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print "offline MathJax apparently already installed"
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return
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# download mathjax
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print "Downloading mathjax source..."
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response = urllib2.urlopen(mathjax_url)
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print "done"
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# use 'r|gz' stream mode, because socket file-like objects can't seek:
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tar = tarfile.open(fileobj=response.fp, mode='r|gz')
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topdir = tar.firstmember.path
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print "Extracting to %s"%dest
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tar.extractall(static)
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# it will be mathjax-MathJax-<sha>, rename to just mathjax
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os.rename(os.path.join(static, topdir), dest)
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__all__ = ['install_mathjax']
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