cleanup csstranslator module, keeping only imports

Author: eliasdorneles

scrapy/selector/csstranslator.py

@@ -1,88 +1,6 @@
-from cssselect import GenericTranslator, HTMLTranslator
-from cssselect.xpath import _unicode_safe_getattr, XPathExpr, ExpressionError
-from cssselect.parser import FunctionalPseudoElement
-
-
-class ScrapyXPathExpr(XPathExpr):
-
-    textnode = False
-    attribute = None
-
-    @classmethod
-    def from_xpath(cls, xpath, textnode=False, attribute=None):
-        x = cls(path=xpath.path, element=xpath.element, condition=xpath.condition)
-        x.textnode = textnode
-        x.attribute = attribute
-        return x
-
-    def __str__(self):
-        path = super(ScrapyXPathExpr, self).__str__()
-        if self.textnode:
-            if path == '*':
-                path = 'text()'
-            elif path.endswith('::*/*'):
-                path = path[:-3] + 'text()'
-            else:
-                path += '/text()'
-
-        if self.attribute is not None:
-            if path.endswith('::*/*'):
-                path = path[:-2]
-            path += '/@%s' % self.attribute
-
-        return path
-
-    def join(self, combiner, other):
-        super(ScrapyXPathExpr, self).join(combiner, other)
-        self.textnode = other.textnode
-        self.attribute = other.attribute
-        return self
-
-
-class TranslatorMixin(object):
-
-    def xpath_element(self, selector):
-        xpath = super(TranslatorMixin, self).xpath_element(selector)
-        return ScrapyXPathExpr.from_xpath(xpath)
-
-    def xpath_pseudo_element(self, xpath, pseudo_element):
-        if isinstance(pseudo_element, FunctionalPseudoElement):
-            method = 'xpath_%s_functional_pseudo_element' % (
-                pseudo_element.name.replace('-', '_'))
-            method = _unicode_safe_getattr(self, method, None)
-            if not method:
-                raise ExpressionError(
-                    "The functional pseudo-element ::%s() is unknown"
-                % pseudo_element.name)
-            xpath = method(xpath, pseudo_element)
-        else:
-            method = 'xpath_%s_simple_pseudo_element' % (
-                pseudo_element.replace('-', '_'))
-            method = _unicode_safe_getattr(self, method, None)
-            if not method:
-                raise ExpressionError(
-                    "The pseudo-element ::%s is unknown"
-                    % pseudo_element)
-            xpath = method(xpath)
-        return xpath
-
-    def xpath_attr_functional_pseudo_element(self, xpath, function):
-        if function.argument_types() not in (['STRING'], ['IDENT']):
-            raise ExpressionError(
-                "Expected a single string or ident for ::attr(), got %r"
-                % function.arguments)
-        return ScrapyXPathExpr.from_xpath(xpath,
-            attribute=function.arguments[0].value)
-
-    def xpath_text_simple_pseudo_element(self, xpath):
-        """Support selecting text nodes using ::text pseudo-element"""
-        return ScrapyXPathExpr.from_xpath(xpath, textnode=True)
-
-
-class ScrapyGenericTranslator(TranslatorMixin, GenericTranslator):
-    pass
-
-
-class ScrapyHTMLTranslator(TranslatorMixin, HTMLTranslator):
-    pass
-
+from parsel.csstranslator import (
+    ScrapyXPathExpr,
+    TranslatorMixin,
+    ScrapyGenericTranslator,
+    ScrapyHTMLTranslator
+)