Added a HTML-generation engine that might hopefully be useful.

[wrw.git] / wrw / sp / xhtml.py

import xml.dom.minidom, StringIO
import cons as _cons
import util
dom = xml.dom.minidom.getDOMImplementation()

ns = u"http://www.w3.org/1999/xhtml"
doctype = u"-//W3C//DTD XHTML 1.1//EN"
dtd = u"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"

class htmlelement(_cons.element):
    def __todoc__(self):
        doc = dom.createDocument(None, None, None)
        doc.appendChild(dom.createDocumentType("html", doctype, dtd))
        doc.appendChild(self.__todom__(doc))
        return doc

def cons(ctx=None):
    return _cons.constructor(ns, htmlelement, ctx)

def head(title=None, css=None):
    h = cons()
    head = h.head
    if title:
        head(h.title(title))
    if isinstance(css, str) or isinstance(css, unicode):
        head(h.link(rel="stylesheet", type="text/css", href=css))
    elif css:
        for ss in css:
            head(h.link(rel="stylesheet", type="text/css", href=ss))
    return head

class htmlformatter(util.formatter):
    allowshort = set([u"br", u"hr", u"img", u"input"])
    def element(self, el, **extra):
        if el.name in self.allowshort:
            super(htmlformatter, self).element(el, **extra)
        else:
            self.longtag(el, **extra)

class htmlindenter(util.indenter, htmlformatter):
    pass

def forreq(req, tree):
    # XXX: Use proper Content-Type for clients accepting it.
    req.ohead["Content-Type"] = "text/html; charset=utf-8"
    buf = StringIO.StringIO()
    htmlindenter.output(buf, tree, doctype=(doctype, dtd), charset="utf-8")
    return [buf.getvalue()]

def xhtmlresp(callable):
    def wrapper(req):
        return forreq(req, callable(req))
    return wrapper