+
−"""defines a validating HTML parser used in web application tests
+
−
+
−:organization: Logilab
+
−:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
+
−:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
−:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
+
−"""
+
−
+
−import re
+
−import sys
+
−
+
−from lxml import etree
+
−
+
−from cubicweb.view import STRICT_DOCTYPE, TRANSITIONAL_DOCTYPE
+
−STRICT_DOCTYPE = str(STRICT_DOCTYPE)
+
−TRANSITIONAL_DOCTYPE = str(TRANSITIONAL_DOCTYPE)
+
−
+
−ERR_COUNT = 0
+
−
+
−class Validator(object):
+
−
+
−    def parse_string(self, data, sysid=None):
+
−        try:
+
−            data = self.preprocess_data(data)
+
−            return PageInfo(data, etree.fromstring(data, self.parser))
+
−        except etree.XMLSyntaxError, exc:
+
−            def save_in(fname=''):
+
−                file(fname, 'w').write(data)
+
−            new_exc = AssertionError(u'invalid xml %s' % exc)
+
−            new_exc.position = exc.position
+
−            raise new_exc
+
−
+
−    def preprocess_data(self, data):
+
−        return data
+
−
+
−
+
−class DTDValidator(Validator):
+
−    def __init__(self):
+
−        Validator.__init__(self)
+
−        # XXX understand what's happening under windows
+
−        validate = True
+
−        if sys.platform == 'win32':
+
−            validate = False
+
−        self.parser = etree.XMLParser(dtd_validation=validate)
+
−
+
−    def preprocess_data(self, data):
+
−        """used to fix potential blockquote mess generated by docutils"""
+
−        if STRICT_DOCTYPE not in data:
+
−            return data
+
−        # parse using transitional DTD
+
−        data = data.replace(STRICT_DOCTYPE, TRANSITIONAL_DOCTYPE)
+
−        tree = etree.fromstring(data, self.parser)
+
−        namespace = tree.nsmap.get(None)
+
−        # this is the list of authorized child tags for <blockquote> nodes
+
−        expected = 'p h1 h2 h3 h4 h5 h6 div ul ol dl pre hr blockquote address ' \
+
−                   'fieldset table form noscript ins del script'.split()
+
−        if namespace:
+
−            blockquotes = tree.findall('.//{%s}blockquote' % namespace)
+
−            expected = ['{%s}%s' % (namespace, tag) for tag in expected]
+
−        else:
+
−            blockquotes = tree.findall('.//blockquote')
+
−        # quick and dirty approach: remove all blockquotes
+
−        for blockquote in blockquotes:
+
−            parent = blockquote.getparent()
+
−            parent.remove(blockquote)
+
−        data = etree.tostring(tree)
+
−        return '<?xml version="1.0" encoding="UTF-8"?>%s\n%s' % (
+
−            STRICT_DOCTYPE, data)
+
−
+
−
+
−class SaxOnlyValidator(Validator):
+
−
+
−    def __init__(self):
+
−        Validator.__init__(self)
+
−        self.parser = etree.XMLParser()
+
−
+
−class HTMLValidator(Validator):
+
−
+
−    def __init__(self):
+
−        Validator.__init__(self)
+
−        self.parser = etree.HTMLParser()
+
−
+
−
+
−
+
−class PageInfo(object):
+
−    """holds various informations on the view's output"""
+
−    def __init__(self, source, root):
+
−        self.source = source
+
−        self.etree = root
+
−        self.source = source
+
−        self.raw_text = u''.join(root.xpath('//text()'))
+
−        self.namespace = self.etree.nsmap
+
−        self.default_ns = self.namespace.get(None)
+
−        self.a_tags = self.find_tag('a')
+
−        self.h1_tags = self.find_tag('h1')
+
−        self.h2_tags = self.find_tag('h2')
+
−        self.h3_tags = self.find_tag('h3')
+
−        self.h4_tags = self.find_tag('h4')
+
−        self.input_tags = self.find_tag('input')
+
−        self.title_tags = [self.h1_tags, self.h2_tags, self.h3_tags, self.h4_tags]
+
−
+
−    def find_tag(self, tag, gettext=True):
+
−        """return a list which contains text of all "tag" elements """
+
−        if self.default_ns is None:
+
−            iterstr = ".//%s" % tag
+
−        else:
+
−            iterstr = ".//{%s}%s" % (self.default_ns, tag)
+
−        if not gettext or tag in ('a', 'input'):
+
−            return [(elt.text, elt.attrib) for elt in self.etree.iterfind(iterstr)]
+
−        return [u''.join(elt.xpath('.//text()')) for elt in self.etree.iterfind(iterstr)]
+
−
+
−    def appears(self, text):
+
−        """returns True if <text> appears in the page"""
+
−        return text in self.raw_text
+
−
+
−    def __contains__(self, text):
+
−        return text in self.source
+
−
+
−    def has_title(self, text, level=None):
+
−        """returns True if <h?>text</h?>
+
−
+
−        :param level: the title's level (1 for h1, 2 for h2, etc.)
+
−        """
+
−        if level is None:
+
−            for hlist in self.title_tags:
+
−                if text in hlist:
+
−                    return True
+
−            return False
+
−        else:
+
−            hlist = self.title_tags[level - 1]
+
−            return text in hlist
+
−
+
−    def has_title_regexp(self, pattern, level=None):
+
−        """returns True if <h?>pattern</h?>"""
+
−        sre = re.compile(pattern)
+
−        if level is None:
+
−            for hlist in self.title_tags:
+
−                for title in hlist:
+
−                    if sre.match(title):
+
−                        return True
+
−            return False
+
−        else:
+
−            hlist = self.title_tags[level - 1]
+
−            for title in hlist:
+
−                if sre.match(title):
+
−                    return True
+
−            return False
+
−
+
−    def has_link(self, text, url=None):
+
−        """returns True if <a href=url>text</a> was found in the page"""
+
−        for link_text, attrs in self.a_tags:
+
−            if text == link_text:
+
−                if url is None:
+
−                    return True
+
−                try:
+
−                    href = attrs['href']
+
−                    if href == url:
+
−                        return True
+
−                except KeyError:
+
−                    continue
+
−        return False
+
−
+
−    def has_link_regexp(self, pattern, url=None):
+
−        """returns True if <a href=url>pattern</a> was found in the page"""
+
−        sre = re.compile(pattern)
+
−        for link_text, attrs in self.a_tags:
+
−            if sre.match(link_text):
+
−                if url is None:
+
−                    return True
+
−                try:
+
−                    href = attrs['href']
+
−                    if href == url:
+
−                        return True
+
−                except KeyError:
+
−                    continue
+
−        return False
+
−
+
−VALMAP = {None: None, 'dtd': DTDValidator, 'xml': SaxOnlyValidator}