96 lines
2.6 KiB
Python
96 lines
2.6 KiB
Python
#!/usr/bin/env python
|
|
# encoding: utf-8
|
|
|
|
from .render import txt, tex
|
|
|
|
class Renderable(object):
|
|
STR_RENDER = tex
|
|
DEFAULT_RENDER = tex
|
|
|
|
@classmethod
|
|
def set_render(cls, render):
|
|
cls.STR_RENDER = render
|
|
|
|
@classmethod
|
|
def get_render(cls):
|
|
return cls.STR_RENDER
|
|
|
|
@classmethod
|
|
def set_default_render(cls):
|
|
cls.set_render(cls.DEFAULT_RENDER)
|
|
|
|
@classmethod
|
|
def tmp_render(cls, render = tex):
|
|
""" Create a container in which Expression render is temporary modify
|
|
|
|
The default temporary render is Expression in order to perform calculus inside numbers
|
|
|
|
>>> from .expression import Expression
|
|
>>> exp = Expression("2*3/5")
|
|
>>> print(exp)
|
|
2 \\times \\frac{ 3 }{ 5 }
|
|
>>> for i in exp.simplify().explain():
|
|
... print(i)
|
|
2 \\times \\frac{ 3 }{ 5 }
|
|
\\frac{ 6 }{ 5 }
|
|
>>> with Expression.tmp_render(txt):
|
|
... for i in exp.simplify().explain():
|
|
... print(i)
|
|
2 * 3 / 5
|
|
6 / 5
|
|
>>> for i in exp.simplify().explain():
|
|
... print(i)
|
|
2 \\times \\frac{ 3 }{ 5 }
|
|
\\frac{ 6 }{ 5 }
|
|
|
|
"""
|
|
class TmpRenderEnv(object):
|
|
def __enter__(self):
|
|
self.old_render = Renderable.get_render()
|
|
Renderable.set_render(render)
|
|
|
|
def __exit__(self, type, value, traceback):
|
|
Renderable.set_render(self.old_render)
|
|
return TmpRenderEnv()
|
|
|
|
class Explicable(Renderable):
|
|
|
|
""" An Explicable object is an object which can be explicable!
|
|
|
|
It's a parent class of a more classical Expression, Fraction and Polynom (and later square root)
|
|
Child class will have the following method
|
|
* explain: Generator which return steps which leed to himself
|
|
|
|
"""
|
|
def __init__(self, *args, **kwargs):
|
|
self.steps = []
|
|
|
|
def explain(self):
|
|
""" Generate and render steps which leed to itself """
|
|
old_s = ''
|
|
# les étapes pour l'atteindre
|
|
try:
|
|
for s in self.steps:
|
|
if hasattr(s, 'postfix_tokens'):
|
|
new_s = self.STR_RENDER(s.postfix_tokens)
|
|
else:
|
|
new_s = self.STR_RENDER(s)
|
|
if new_s != old_s:
|
|
old_s = new_s
|
|
yield new_s
|
|
except AttributeError:
|
|
pass
|
|
|
|
# Lui même
|
|
new_s = self.STR_RENDER(self.postfix_tokens)
|
|
if new_s != old_s:
|
|
yield new_s
|
|
|
|
|
|
|
|
|
|
# -----------------------------
|
|
# Reglages pour 'vim'
|
|
# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
|
|
# cursor: 16 del
|