#!/usr/bin/env python
# encoding: utf-8

import os
import jinja2

__all__ = ["texenv"]

# Definition of jinja syntax for latex
texenv = jinja2.Environment(
    block_start_string='\Block{',
    block_end_string='}',
    variable_start_string='\Var{',
    variable_end_string='}',
    line_statement_prefix='%-',
    line_comment_prefix='%#',
    loader=jinja2.FileSystemLoader(os.path.abspath('.')),
    extensions=['jinja2.ext.do']
)


# Filters
def do_calculus(steps, name="A", sep="=", end="", joining=" \\\\ \n"):
    """Display properly the calculus

    Generate this form string:
    "name & sep & a_step end joining"

    :param steps: list of steps
    :returns: latex string ready to be endbeded


    """

    ans = joining.join([
        name + " & "
        + sep + " & "
        + str(s) + end for s in steps
        ])
    return ans


texenv.filters['calculus'] = do_calculus

from random import shuffle
texenv.filters['shuffle'] = shuffle



# -----------------------------
# Reglages pour 'vim'
# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
# cursor: 16 del