117 lines
3.2 KiB
Python
117 lines
3.2 KiB
Python
#!/usr/bin/env python
|
|
# encoding: utf-8
|
|
|
|
from .render import tex, txt
|
|
|
|
__all__ = ['Renderable']
|
|
|
|
class Renderable(object):
|
|
"""
|
|
A Renderable object is an object which can work with Render class. It means that it has to have attribute postfix_tokens.
|
|
"""
|
|
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
|
|
>>> from .explicable import Explicable
|
|
>>> 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{ 3 }{ 5 } \\times 2
|
|
\\frac{ 3 \\times 2 }{ 5 }
|
|
\\frac{ 6 }{ 5 }
|
|
>>> with Explicable.tmp_render(txt):
|
|
... for i in exp.simplify().explain():
|
|
... print(i)
|
|
2 * 3 / 5
|
|
3 / 5 * 2
|
|
( 3 * 2 ) / 5
|
|
6 / 5
|
|
>>> for i in exp.simplify().explain():
|
|
... print(i)
|
|
2 \\times \\frac{ 3 }{ 5 }
|
|
\\frac{ 3 }{ 5 } \\times 2
|
|
\\frac{ 3 \\times 2 }{ 5 }
|
|
\\frac{ 6 }{ 5 }
|
|
|
|
# TODO: essayer de ne pas afficher ce changement de position. |lun. avril 6 17:29:56 CEST 2015
|
|
|
|
"""
|
|
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()
|
|
|
|
def __init__(self, pstf_tokens):
|
|
"""Initiate the renderable objet
|
|
|
|
:param pstf_tokens: the postfix list of tokens
|
|
|
|
"""
|
|
self.postfix_tokens = pstf_tokens
|
|
|
|
def __str__(self):
|
|
"""
|
|
Overload str
|
|
|
|
If you want to changer render use Expression.set_render(...) or use tmp_render context manager.
|
|
"""
|
|
return self.STR_RENDER(self.postfix_tokens)
|
|
|
|
def __repr__(self):
|
|
return "< {cls} {pstf_tokens}>".format(
|
|
cls = str(self.__class__).split('.')[-1][:-2],
|
|
pstf_tokens = str(self.postfix_tokens)
|
|
)
|
|
|
|
def __eq__(self, other):
|
|
""" Two Renderable objects are the same if they have same postfix_tokens """
|
|
try:
|
|
return self.postfix_tokens == other.postfix_tokens
|
|
except AttributeError:
|
|
return False
|
|
|
|
def __txt__(self):
|
|
try:
|
|
return txt(self.postfix_tokens)
|
|
except AttributeError:
|
|
return self
|
|
|
|
def __tex__(self):
|
|
try:
|
|
return tex(self.postfix_tokens)
|
|
except AttributeError:
|
|
return self
|
|
|
|
|
|
# -----------------------------
|
|
# Reglages pour 'vim'
|
|
# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
|
|
# cursor: 16 del
|