rename parser/parsers module, add get_parsers() with preference_order

weboob/tools/parsers/html5libparser.py

@@ -0,0 +1,54 @@
+# -*- coding: utf-8 -*-
+
+"""
+Copyright(C) 2010  Romain Bignon, Christophe Benz
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, version 3 of the License.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+"""
+
+from html5lib import treebuilders, HTMLParser
+try:
+    from xml.etree import cElementTree as ElementTree
+except ImportError:
+    from xml.etree import ElementTree
+
+from .iparser import IParser
+
+
+__all__ = ['Html5libParser']
+
+
+class Html5libParser(HTMLParser, IParser):
+    """
+    Parser using html5lib.
+
+    Note that it is not available on every systems.
+    """
+
+    # Default implementation for each type of API.
+    defaults = {'etree': ElementTree,
+               }
+    def __init__(self, api='etree'):
+        # if no default implementation is defined for this api, set it to None
+        # to let getTreeBuilder() using the corresponding implementation.
+        implementation = self.defaults.get(api, None)
+        HTMLParser.__init__(self, tree=treebuilders.getTreeBuilder(api, implementation))
+
+    def parse(self, data, encoding):
+        return HTMLParser.parse(self, data, encoding=encoding)
+
+    def tostring(self, elem):
+        # TODO
+        raise NotImplementedError()