--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/eggs/py-1.4.0-py2.6.egg/py/_xmlgen.py Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,244 @@
+"""
+module for generating and serializing xml and html structures
+by using simple python objects.
+
+(c) holger krekel, holger at merlinux eu. 2009
+"""
+import py
+import sys, re
+
+if sys.version_info >= (3,0):
+ def u(s):
+ return s
+ def unicode(x):
+ if hasattr(x, '__unicode__'):
+ return x.__unicode__()
+ return str(x)
+else:
+ def u(s):
+ return unicode(s)
+ unicode = unicode
+
+
+class NamespaceMetaclass(type):
+ def __getattr__(self, name):
+ if name[:1] == '_':
+ raise AttributeError(name)
+ if self == Namespace:
+ raise ValueError("Namespace class is abstract")
+ tagspec = self.__tagspec__
+ if tagspec is not None and name not in tagspec:
+ raise AttributeError(name)
+ classattr = {}
+ if self.__stickyname__:
+ classattr['xmlname'] = name
+ cls = type(name, (self.__tagclass__,), classattr)
+ setattr(self, name, cls)
+ return cls
+
+class Tag(list):
+ class Attr(object):
+ def __init__(self, **kwargs):
+ self.__dict__.update(kwargs)
+
+ def __init__(self, *args, **kwargs):
+ super(Tag, self).__init__(args)
+ self.attr = self.Attr(**kwargs)
+
+ def __unicode__(self):
+ return self.unicode(indent=0)
+ __str__ = __unicode__
+
+ def unicode(self, indent=2):
+ l = []
+ SimpleUnicodeVisitor(l.append, indent).visit(self)
+ return "".join(l)
+
+ def __repr__(self):
+ name = self.__class__.__name__
+ return "<%r tag object %d>" % (name, id(self))
+
+Namespace = NamespaceMetaclass('Namespace', (object, ), {
+ '__tagspec__': None,
+ '__tagclass__': Tag,
+ '__stickyname__': False,
+})
+
+class HtmlTag(Tag):
+ def unicode(self, indent=2):
+ l = []
+ HtmlVisitor(l.append, indent, shortempty=False).visit(self)
+ return u("").join(l)
+
+# exported plain html namespace
+class html(Namespace):
+ __tagclass__ = HtmlTag
+ __stickyname__ = True
+ __tagspec__ = dict([(x,1) for x in (
+ 'a,abbr,acronym,address,applet,area,b,bdo,big,blink,'
+ 'blockquote,body,br,button,caption,center,cite,code,col,'
+ 'colgroup,comment,dd,del,dfn,dir,div,dl,dt,em,embed,'
+ 'fieldset,font,form,frameset,h1,h2,h3,h4,h5,h6,head,html,'
+ 'i,iframe,img,input,ins,kbd,label,legend,li,link,listing,'
+ 'map,marquee,menu,meta,multicol,nobr,noembed,noframes,'
+ 'noscript,object,ol,optgroup,option,p,pre,q,s,script,'
+ 'select,small,span,strike,strong,style,sub,sup,table,'
+ 'tbody,td,textarea,tfoot,th,thead,title,tr,tt,u,ul,xmp,'
+ 'base,basefont,frame,hr,isindex,param,samp,var'
+ ).split(',') if x])
+
+ class Style(object):
+ def __init__(self, **kw):
+ for x, y in kw.items():
+ x = x.replace('_', '-')
+ setattr(self, x, y)
+
+
+class raw(object):
+ """just a box that can contain a unicode string that will be
+ included directly in the output"""
+ def __init__(self, uniobj):
+ self.uniobj = uniobj
+
+class SimpleUnicodeVisitor(object):
+ """ recursive visitor to write unicode. """
+ def __init__(self, write, indent=0, curindent=0, shortempty=True):
+ self.write = write
+ self.cache = {}
+ self.visited = {} # for detection of recursion
+ self.indent = indent
+ self.curindent = curindent
+ self.parents = []
+ self.shortempty = shortempty # short empty tags or not
+
+ def visit(self, node):
+ """ dispatcher on node's class/bases name. """
+ cls = node.__class__
+ try:
+ visitmethod = self.cache[cls]
+ except KeyError:
+ for subclass in cls.__mro__:
+ visitmethod = getattr(self, subclass.__name__, None)
+ if visitmethod is not None:
+ break
+ else:
+ visitmethod = self.object
+ self.cache[cls] = visitmethod
+ visitmethod(node)
+
+ def object(self, obj):
+ #self.write(obj)
+ self.write(escape(unicode(obj)))
+
+ def raw(self, obj):
+ self.write(obj.uniobj)
+
+ def list(self, obj):
+ assert id(obj) not in self.visited
+ self.visited[id(obj)] = 1
+ map(self.visit, obj)
+
+ def Tag(self, tag):
+ assert id(tag) not in self.visited
+ try:
+ tag.parent = self.parents[-1]
+ except IndexError:
+ tag.parent = None
+ self.visited[id(tag)] = 1
+ tagname = getattr(tag, 'xmlname', tag.__class__.__name__)
+ if self.curindent and not self._isinline(tagname):
+ self.write("\n" + u(' ') * self.curindent)
+ if tag:
+ self.curindent += self.indent
+ self.write(u('<%s%s>') % (tagname, self.attributes(tag)))
+ self.parents.append(tag)
+ for x in tag:
+ self.visit(x)
+ self.parents.pop()
+ self.write(u('</%s>') % tagname)
+ self.curindent -= self.indent
+ else:
+ nameattr = tagname+self.attributes(tag)
+ if self._issingleton(tagname):
+ self.write(u('<%s/>') % (nameattr,))
+ else:
+ self.write(u('<%s></%s>') % (nameattr, tagname))
+
+ def attributes(self, tag):
+ # serialize attributes
+ attrlist = dir(tag.attr)
+ attrlist.sort()
+ l = []
+ for name in attrlist:
+ res = self.repr_attribute(tag.attr, name)
+ if res is not None:
+ l.append(res)
+ l.extend(self.getstyle(tag))
+ return u("").join(l)
+
+ def repr_attribute(self, attrs, name):
+ if name[:2] != '__':
+ value = getattr(attrs, name)
+ if name.endswith('_'):
+ name = name[:-1]
+ return ' %s="%s"' % (name, escape(unicode(value)))
+
+ def getstyle(self, tag):
+ """ return attribute list suitable for styling. """
+ try:
+ styledict = tag.style.__dict__
+ except AttributeError:
+ return []
+ else:
+ stylelist = [x+': ' + y for x,y in styledict.items()]
+ return [u(' style="%s"') % u('; ').join(stylelist)]
+
+ def _issingleton(self, tagname):
+ """can (and will) be overridden in subclasses"""
+ return self.shortempty
+
+ def _isinline(self, tagname):
+ """can (and will) be overridden in subclasses"""
+ return False
+
+class HtmlVisitor(SimpleUnicodeVisitor):
+
+ single = dict([(x, 1) for x in
+ ('br,img,area,param,col,hr,meta,link,base,'
+ 'input,frame').split(',')])
+ inline = dict([(x, 1) for x in
+ ('a abbr acronym b basefont bdo big br cite code dfn em font '
+ 'i img input kbd label q s samp select small span strike '
+ 'strong sub sup textarea tt u var'.split(' '))])
+
+ def repr_attribute(self, attrs, name):
+ if name == 'class_':
+ value = getattr(attrs, name)
+ if value is None:
+ return
+ return super(HtmlVisitor, self).repr_attribute(attrs, name)
+
+ def _issingleton(self, tagname):
+ return tagname in self.single
+
+ def _isinline(self, tagname):
+ return tagname in self.inline
+
+
+class _escape:
+ def __init__(self):
+ self.escape = {
+ u('"') : u('"'), u('<') : u('<'), u('>') : u('>'),
+ u('&') : u('&'), u("'") : u('''),
+ }
+ self.charef_rex = re.compile(u("|").join(self.escape.keys()))
+
+ def _replacer(self, match):
+ return self.escape[match.group(0)]
+
+ def __call__(self, ustring):
+ """ xml-escape the given unicode string. """
+ ustring = unicode(ustring)
+ return self.charef_rex.sub(self._replacer, ustring)
+
+escape = _escape()