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PythonCHBPythonCHB
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added solution to html render assignment.
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‎Solutions/Session06/html_render.py‎

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#!/usr/bin/env python
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"""
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html render code
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"""
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class Element(object):
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tag = 'html'
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indent = ' '
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def __init__(self, content=None, **attributes):
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self.content = []
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self.attributes = attributes
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if content is not None:
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self.content.append(content)
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def append(self, content):
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self.content.append(content)
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def render_tag(self, current_ind):
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attrs = "".join([' {}="{}"'.format(key,val) for key, val in self.attributes.items()])
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tag_str = "{}<{}{}>".format(current_ind, self.tag, attrs)
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return tag_str
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def render(self, file_out, current_ind=""):
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file_out.write(self.render_tag(current_ind))
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file_out.write('\n')
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#print "in render:"
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#print self.content
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for con in self.content:
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#print "trying to render:", con
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try:
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file_out.write( current_ind + self.indent + con+"\n")
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except TypeError:
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con.render(file_out, current_ind+self.indent)
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file_out.write("{}</{}>\n".format(current_ind,self.tag))
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class OneLineTag(Element):
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def render(self, file_out, current_ind=""):
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file_out.write(self.render_tag(current_ind))
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for con in self.content:
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file_out.write(con)
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file_out.write("</{}>\n".format(self.tag))
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class Title(OneLineTag):
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tag = 'title'
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class SelfClosingTag(Element):
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def render(self, file_out, current_ind=""):
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file_out.write(self.render_tag(current_ind)[:-1])
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file_out.write(" />\n")
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class Hr(SelfClosingTag):
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tag = 'hr'
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class A(OneLineTag):
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tag = 'a'
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def __init__(self, link, content=None, **attributes):
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OneLineTag.__init__(self, content, **attributes)
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self.attributes["href"] = link
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class H(OneLineTag):
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def __init__(self, level, content=None, **attributes):
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OneLineTag.__init__(self, content, **attributes)
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self.tag = "h%i"%(level)
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# H(2, "The text of the header")
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class Ul(Element):
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tag = 'ul'
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class Li(Element):
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tag = 'li'
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class Html(Element):
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tag = 'html'
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def render(self, file_out, current_ind=""):
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file_out.write("<!DOCTYPE html>\n")
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Element.render(self, file_out, current_ind=self.indent)
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class Body(Element):
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tag = 'body'
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class P(Element):
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tag = 'p'
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class Head(Element):
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tag = 'head'
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‎Solutions/Session06/run_html_render.py‎

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#!/usr/bin/env python
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"""
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a simple script can run and test your html rendering classes.
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Uncomment the steps as you add to your rendering.
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"""
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from cStringIO import StringIO
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# importing the html_rendering code with a short name for easy typing.
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import html_render as hr
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reload(hr) # reloading in case you are running this in iPython
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# -- we want to make sure the latest version is used
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## writing the file out:
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def render_page(page, filename):
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"""
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render the tree of elements
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This uses cSstringIO to render to memory, then dump to console and
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write to file -- very handy!
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"""
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f = StringIO()
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page.render(f, " ")
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f.reset()
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print f.read()
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f.reset()
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open(filename, 'w').write( f.read() )
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## Step 1
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##########
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# page = hr.Element()
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# page.append("Here is a paragraph of text -- there could be more of them, but this is enough to show that we can do some text")
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# page.append("And here is another piece of text -- you should be able to add any number")
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# render_page(page, "test_html_output1.html")
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# ## Step 2
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# ##########
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# page = hr.Html()
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# body = hr.Body()
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# body.append(hr.P("Here is a paragraph of text -- there could be more of them, but this is enough to show that we can do some text"))
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# body.append(hr.P("And here is another piece of text -- you should be able to add any number"))
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# page.append(body)
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# render_page(page, "test_html_output2.html")
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# # Step 3
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# ##########
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# page = hr.Html()
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# head = hr.Head()
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# head.append(hr.Title("PythonClass = Revision 1087:"))
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# page.append(head)
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# body = hr.Body()
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# body.append(hr.P("Here is a paragraph of text -- there could be more of them, but this is enough to show that we can do some text"))
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# body.append(hr.P("And here is another piece of text -- you should be able to add any number"))
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# page.append(body)
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# render_page(page, "test_html_output3.html")
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# # Step 4
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# ##########
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# page = hr.Html()
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# head = hr.Head()
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# head.append(hr.Title("PythonClass = Revision 1087:"))
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# page.append(head)
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# body = hr.Body()
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# body.append(hr.P("Here is a paragraph of text -- there could be more of them, but this is enough to show that we can do some text",
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# style="text-align: center; font-style: oblique;"))
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# page.append(body)
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# render_page(page, "test_html_output4.html")
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# # Step 5
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# #########
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# page = hr.Html()
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# head = hr.Head()
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# head.append(hr.Title("PythonClass = Revision 1087:"))
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# page.append(head)
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# body = hr.Body()
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# body.append(hr.P("Here is a paragraph of text -- there could be more of them, but this is enough to show that we can do some text",
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# style="text-align: center; font-style: oblique;"))
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# body.append(hr.Hr())
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# page.append(body)
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# render_page(page, "test_html_output5.html")
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# # Step 6
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# #########
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# page = hr.Html()
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# head = hr.Head()
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# head.append(hr.Title("PythonClass = Revision 1087:"))
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# page.append(head)
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# body = hr.Body()
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# body.append(hr.P("Here is a paragraph of text -- there could be more of them, but this is enough to show that we can do some text",
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# style="text-align: center; font-style: oblique;"))
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# body.append(hr.Hr())
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# body.append("And this is a ")
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# body.append( hr.A("http://google.com", "link") )
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# body.append("to google")
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# page.append(body)
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# render_page(page, "test_html_output6.html")
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# # Step 7
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# #########
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# page = hr.Html()
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# head = hr.Head()
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# head.append(hr.Title("PythonClass = Revision 1087:"))
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# page.append(head)
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# body = hr.Body()
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# body.append( hr.H(2, "PythonClass - Class 6 example") )
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# body.append(hr.P("Here is a paragraph of text -- there could be more of them, but this is enough to show that we can do some text",
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# style="text-align: center; font-style: oblique;"))
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# body.append(hr.Hr())
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# list = hr.Ul(id="TheList", style="line-height:200%")
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# list.append( hr.Li("The first item in a list") )
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# list.append( hr.Li("This is the second item", style="color: red") )
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# item = hr.Li()
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# item.append("And this is a ")
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# item.append( hr.A("http://google.com", "link") )
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# item.append("to google")
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# list.append(item)
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# body.append(list)
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# page.append(body)
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# render_page(page, "test_html_output7.html")
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# # Step 8
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# ########
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page = hr.Html()
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head = hr.Head()
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head.append( hr.Meta(charset="UTF-8") )
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head.append(hr.Title("PythonClass = Revision 1087:"))
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page.append(head)
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body = hr.Body()
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body.append( hr.H(2, "PythonClass - Class 6 example") )
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body.append(hr.P("Here is a paragraph of text -- there could be more of them, but this is enough to show that we can do some text",
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style="text-align: center; font-style: oblique;"))
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body.append(hr.Hr())
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list = hr.Ul(id="TheList", style="line-height:200%")
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list.append( hr.Li("The first item in a list") )
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list.append( hr.Li("This is the second item", style="color: red") )
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item = hr.Li()
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item.append("And this is a ")
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item.append( hr.A("http://google.com", "link") )
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item.append("to google")
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list.append(item)
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body.append(list)
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page.append(body)
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render_page(page, "test_html_output8.html")
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