104 lines
2.8 KiB
Python
104 lines
2.8 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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from .render import Render
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from .fraction import Fraction
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from .generic import first_elem, last_elem
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__all__ = ['post2in_fix', 'tex_render', 'txt_render']
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# ------------------------
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# A infix to postfix list convertor
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p2i_infix = {"+": "+", "-": "-", "*": "*", "/" : "/", ":": ":", "^":"^"}
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p2i_postfix = {}
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p2i_other = {"(": "(", ")": ")"}
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post2in_fix = Render(p2i_infix, p2i_postfix, p2i_other, join = False)
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# ------------------------
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# A console render
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def txtMult(op1,op2):
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""" Tex render for *
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Cases where \\times won't be displayed
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* nbr letter
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* nbr (
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* )(
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"""
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first_nbr = type(op1) in [int, Fraction]
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seg_letter = type(op2) == str and op2.isalpha()
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first_par = (first_elem(op2) == "(")
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seg_par = (last_elem(op1) == ")")
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if (first_nbr and (seg_letter or seg_par)) \
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or (first_par and seg_par):
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return [op1, op2]
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else:
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return [op1, "*", op2]
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txt_infix = {"+": "+", "-": "-", "*": txtMult, "/" : "/", ":":":", "^":"^"}
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txt_postfix = {}
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txt_other = {"(": "(", ")": ")"}
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txt_render = Render(txt_infix, txt_postfix, txt_other)
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# ------------------------
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# A latex render
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def texSlash(op1, op2):
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""" Tex render for / """
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if not Render.isNumerande(op1) and op1[0] == "(" and op1[-1] == ")":
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op1 = op1[1:-1]
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if not Render.isNumerande(op2) and op2[0] == "(" and op2[-1] == ")":
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op2 = op2[1:-1]
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return ["\\frac{" , op1 , "}{" , op2 , "}"]
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def texFrac(frac):
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""" Tex render for Fractions"""
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return ["\\frac{" , str(frac._num) , "}{" , str(frac._denom) , "}"]
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def texMult(op1,op2):
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""" Tex render for *
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Cases where \\times won't be displayed
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* nbr letter
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* nbr (
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* )(
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"""
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first_nbr = type(op1) in [int, Fraction]
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seg_letter = type(op2) == str and op2.isalpha()
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first_par = (first_elem(op2) == "(")
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seg_par = (last_elem(op1) == ")")
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if (first_nbr and (seg_letter or seg_par)) \
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or (first_par and seg_par):
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return [op1, op2]
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else:
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return [op1, "\\times", op2]
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tex_infix = {"+": " + ", "-": " - ", "*": texMult , ":": ":", "^":"^"}
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tex_postfix = {"/": texSlash}
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tex_other = {"(": "(", ")": ")"}
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tex_type_render = {str:str, int: str, Fraction: texFrac}
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tex_render = Render(tex_infix, tex_postfix, tex_other, type_render = tex_type_render)
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if __name__ == '__main__':
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#exp = [2, 5, '^', 1, '-', 3, 4, '*', ':']
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#print(txt_render(exp))
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#exp = [2, 5, '^', 1, '-', 3, 4, '*', '/', 3, 5, '/', ':']
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exp = [2, -3, "*"]
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print(tex_render(exp))
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#exp = [2, 5, '^', 1, '-', 3, 4, '*', '/', 3, '+']
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#print(post2in_fix(exp))
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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