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"""reST directive for syntax-highlighting ipython interactive sessions.
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"""
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#-----------------------------------------------------------------------------
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# Needed modules
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# Standard library
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import re
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# Third party
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from pygments.lexer import Lexer, do_insertions
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from pygments.lexers.agile import (PythonConsoleLexer, PythonLexer,
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PythonTracebackLexer)
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from pygments.token import Comment, Generic
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from sphinx import highlighting
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#-----------------------------------------------------------------------------
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# Global constants
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line_re = re.compile('.*?\n')
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#-----------------------------------------------------------------------------
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# Code begins - classes and functions
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class IPythonConsoleLexer(Lexer):
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"""
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For IPython console output or doctests, such as:
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.. sourcecode:: ipython
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In [1]: a = 'foo'
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In [2]: a
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Out[2]: 'foo'
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In [3]: print a
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foo
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In [4]: 1 / 0
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Notes:
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- Tracebacks are not currently supported.
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- It assumes the default IPython prompts, not customized ones.
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"""
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name = 'IPython console session'
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aliases = ['ipython']
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mimetypes = ['text/x-ipython-console']
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input_prompt = re.compile("(In \[[0-9]+\]: )|( \.\.\.+:)")
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output_prompt = re.compile("(Out\[[0-9]+\]: )|( \.\.\.+:)")
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continue_prompt = re.compile(" \.\.\.+:")
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tb_start = re.compile("\-+")
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def get_tokens_unprocessed(self, text):
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pylexer = PythonLexer(**self.options)
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tblexer = PythonTracebackLexer(**self.options)
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curcode = ''
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insertions = []
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for match in line_re.finditer(text):
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line = match.group()
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input_prompt = self.input_prompt.match(line)
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continue_prompt = self.continue_prompt.match(line.rstrip())
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output_prompt = self.output_prompt.match(line)
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if line.startswith("#"):
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insertions.append((len(curcode),
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[(0, Comment, line)]))
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elif input_prompt is not None:
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insertions.append((len(curcode),
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[(0, Generic.Prompt, input_prompt.group())]))
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curcode += line[input_prompt.end():]
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elif continue_prompt is not None:
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insertions.append((len(curcode),
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[(0, Generic.Prompt, continue_prompt.group())]))
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curcode += line[continue_prompt.end():]
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elif output_prompt is not None:
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insertions.append((len(curcode),
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[(0, Generic.Output, output_prompt.group())]))
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curcode += line[output_prompt.end():]
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else:
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if curcode:
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for item in do_insertions(insertions,
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pylexer.get_tokens_unprocessed(curcode)):
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yield item
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curcode = ''
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insertions = []
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yield match.start(), Generic.Output, line
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if curcode:
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for item in do_insertions(insertions,
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pylexer.get_tokens_unprocessed(curcode)):
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yield item
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#-----------------------------------------------------------------------------
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# Register the extension as a valid pygments lexer
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highlighting.lexers['ipython'] = IPythonConsoleLexer()
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