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Merge pull request UWPCE-PythonCert#89 from MikeSchincariol/master
Session7 - html_render
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‎students/MikeSchincariol/session7/html_render.py‎

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import io
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class Element(object):
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@classmethod
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def check_content_is_compat(cls, content):
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if isinstance(content, str) or isinstance(content, Element):
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return True
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else:
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return False
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def __init__(self, content=None, **kwargs):
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'''
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:param content: The string or element instance to initialize the element with.
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:param kwargs: Attributes that are associated with the content
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:return: Nothing
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'''
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self.tag = 'tag'
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self.data = []
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self.attr = kwargs
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if content is not None:
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if Element.check_content_is_compat(content):
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self.data.append(content)
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else:
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raise ValueError("The 'content' argument must be a string or another Element")
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def append(self, content, **kwargs):
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'''
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:param content: The string or element instance to add to the items already in the element
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:param kwargs: Attributes that are associated with the content
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:return: Nothing
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'''
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self.attr.update(kwargs)
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if content is not None:
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if Element.check_content_is_compat(content):
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self.data.append(content)
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else:
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raise ValueError("The 'content' argument must be a string or another Element")
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def _render_start_tag(self, file_out, ind, inline=True, self_closing=False):
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try:
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if not inline:
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file_out.write("\n{0}".format(ind))
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file_out.write("<{0}".format(self.tag))
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for k,v in self.attr.items():
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file_out.write(' {0}="{1}"'.format(k, v))
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if self_closing:
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file_out.write("/>")
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else:
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file_out.write(">")
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except AttributeError:
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raise ValueError("The 'file_out' argument must be a class or subclass of io.TextIOBase")
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def _render_data(self, file_out, ind, inline=True):
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sub_ind = " " * (len(ind) + 3)
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for idx, item in enumerate(self.data):
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try:
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# Assume it is an Element
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item.render(file_out, sub_ind)
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except AttributeError:
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# Guess not...assume it is a string :)
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try:
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if not inline:
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file_out.write("\n{0}".format(sub_ind))
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file_out.write("{0}".format(item))
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except AttributeError:
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raise ValueError("The 'file_out' argument must be a class or subclass of io.TextIOBase")
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def _render_end_tag(self, file_out, ind, inline=True):
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try:
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if not inline:
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file_out.write("\n{0}".format(ind))
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file_out.write("</{0}>".format(self.tag))
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except AttributeError:
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raise ValueError("The 'file_out' argument must be a class or subclass of io.TextIOBase")
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def render(self, file_out, ind = ""):
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'''
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:param file_out: A io.TextIOBase file object
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:param ind: A string, which supplies the amount of indentation whitespace to use
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:return: Nothing
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'''
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self._render_start_tag(file_out, ind, False, False)
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self._render_data(file_out, ind, False)
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self._render_end_tag(file_out, ind, False)
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class Html(Element):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "html"
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self.data.append("<!DOCTYPE html>")
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class Body(Element):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "body"
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class P(Element):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "p"
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class Head(Element):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "head"
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class Ul(Element):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "ul"
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class Li(Element):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "li"
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class OneLineTag(Element):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "head"
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def render(self, file_out, ind=""):
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'''
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:param file_out: A io.TextIOBase file object
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:param ind: A string, which supplies the amount of indentation whitespace to use
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:return: Nothing
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'''
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self._render_start_tag(file_out, ind, False, False)
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self._render_data(file_out, ind, True)
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self._render_end_tag(file_out, ind, True)
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class Title(OneLineTag):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "title"
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class H(OneLineTag):
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def __init__(self, hdr_lvl, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "h{0}".format(hdr_lvl)
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class SelfClosingTag(Element):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "selfclosing"
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def render(self, file_out, ind = ""):
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'''
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:param file_out: A io.TextIOBase file object
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:param ind: A string, which supplies the amount of indentation whitespace to use
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:return: Nothing
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'''
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self._render_start_tag(file_out, ind, True, True)
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self._render_data(file_out, ind, True)
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class Hr(SelfClosingTag):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "hr"
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class Br(SelfClosingTag):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "br"
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class Meta(SelfClosingTag):
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def __init__(self, content=None, **kwargs):
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super().__init__(content, **kwargs)
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self.tag = "meta"
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self.attr['charset']="UTF-8"
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class A(Element):
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def __init__(self, link, content):
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super().__init__(content, href=link)
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self.tag = "a"

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