wrw/sp/xhtml.py

   1 import xml.dom.minidom, io
   2 from . import cons as _cons
   3 from . import util
   4 dom = xml.dom.minidom.getDOMImplementation()
   5
   6 ns = "http://www.w3.org/1999/xhtml"
   7 doctype = "-//W3C//DTD XHTML 1.1//EN"
   8 dtd = "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"
   9
  10 class htmlelement(_cons.element):
  11     def __todoc__(self):
  12         doc = dom.createDocument(None, None, None)
  13         doc.appendChild(dom.createDocumentType("html", doctype, dtd))
  14         doc.appendChild(self.__todom__(doc))
  15         return doc
  16
  17 class xhtmlcontext(_cons.context):
  18     attrmap = {"klass": "class"}
  19
  20     def addattr(self, node, k, v):
  21         k = str(k)
  22         super().addattr(node, self.attrmap.get(k, k), v)
  23
  24 def cons(ctx=None):
  25     if ctx is None: ctx = xhtmlcontext()
  26     return _cons.constructor(ns, htmlelement, ctx)
  27
  28 def head(title=None, css=None):
  29     h = cons()
  30     head = h.head
  31     if title:
  32         head(h.title(title))
  33     if isinstance(css, str) or isinstance(css, bytes):
  34         head(h.link(rel="stylesheet", type="text/css", href=css))
  35     elif css:
  36         for ss in css:
  37             head(h.link(rel="stylesheet", type="text/css", href=ss))
  38     return head
  39
  40 class htmlformatter(util.formatter):
  41     allowshort = {"br", "hr", "img", "input", "meta", "link"}
  42     def shorttag(self, el):
  43         if el.name in self.allowshort:
  44             super().shorttag(el)
  45         else:
  46             self.starttag(el)
  47             self.endtag(el)
  48
  49 class htmlindenter(util.textindenter, htmlformatter):
  50     pass
  51
  52 def forreq(req, tree):
  53     # XXX: Use proper Content-Type for clients accepting it.
  54     req.ohead["Content-Type"] = "text/html; charset=utf-8"
  55     buf = io.BytesIO()
  56     htmlindenter.output(buf, tree, doctype=(doctype, dtd), charset="utf-8")
  57     ret = buf.getvalue()
  58     req.ohead["Content-Length"] = len(ret)
  59     return [ret]
  60
  61 def xhtmlresp(callable):
  62     def wrapper(req):
  63         return forreq(req, callable(req))
  64     wrapper.__wrapped__ = callable
  65     return wrapper