latex.py
72 lines
| 2.5 KiB
| text/x-python
|
PythonLexer
|
r10478 | """Latex transformer. | ||
Module that allows latex output notebooks to be conditioned before | ||||
they are converted. | ||||
""" | ||||
#----------------------------------------------------------------------------- | ||||
# 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 __future__ import print_function | ||||
#----------------------------------------------------------------------------- | ||||
# Functions | ||||
#----------------------------------------------------------------------------- | ||||
def rm_math_space(text): | ||||
""" | ||||
Remove the space between latex math commands and enclosing $ symbols. | ||||
""" | ||||
# First, scan through the markdown looking for $. If | ||||
# a $ symbol is found, without a preceding \, assume | ||||
# it is the start of a math block. UNLESS that $ is | ||||
# not followed by another within two math_lines. | ||||
math_regions = [] | ||||
math_lines = 0 | ||||
within_math = False | ||||
math_start_index = 0 | ||||
ptext = '' | ||||
last_character = "" | ||||
skip = False | ||||
for index, char in enumerate(text): | ||||
#Make sure the character isn't preceeded by a backslash | ||||
if (char == "$" and last_character != "\\"): | ||||
# Close the math region if this is an ending $ | ||||
if within_math: | ||||
within_math = False | ||||
skip = True | ||||
ptext = ptext+'$'+text[math_start_index+1:index].strip()+'$' | ||||
math_regions.append([math_start_index, index+1]) | ||||
else: | ||||
# Start a new math region | ||||
within_math = True | ||||
math_start_index = index | ||||
math_lines = 0 | ||||
# If we are in a math region, count the number of lines parsed. | ||||
# Cancel the math region if we find two line breaks! | ||||
elif char == "\n": | ||||
if within_math: | ||||
math_lines += 1 | ||||
if math_lines > 1: | ||||
within_math = False | ||||
ptext = ptext+text[math_start_index:index] | ||||
# Remember the last character so we can easily watch | ||||
# for backslashes | ||||
last_character = char | ||||
if not within_math and not skip: | ||||
ptext = ptext+char | ||||
if skip: | ||||
skip = False | ||||
return ptext | ||||