From 2791c74b8c1afc1014e380111b7e7f4d4ea09539 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Thu, 12 Dec 2013 22:22:16 +0000
Subject: Read :fresh on HTML path elements

---
 mammoth/html_paths.py       |  8 +++++---
 mammoth/style_reader.py     | 13 ++++++++++---
 tests/style_reader_tests.py | 10 +++++++++-
 3 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/mammoth/html_paths.py b/mammoth/html_paths.py
index 0f2184d..887288b 100644
--- a/mammoth/html_paths.py
+++ b/mammoth/html_paths.py
@@ -5,11 +5,13 @@ def path(elements):
     return HtmlPath(elements)
 
 
-def element(names, class_names=None):
+def element(names, class_names=None, fresh=None):
     if class_names is None:
         class_names = []
-    return HtmlPathElement(names, class_names)
+    if fresh is None:
+        fresh = False
+    return HtmlPathElement(names, class_names, fresh)
 
 
 HtmlPath = collections.namedtuple("HtmlPath", ["elements"])
-HtmlPathElement = collections.namedtuple("HtmlPathElement", ["names", "class_names"])
+HtmlPathElement = collections.namedtuple("HtmlPathElement", ["names", "class_names", "fresh"])
diff --git a/mammoth/style_reader.py b/mammoth/style_reader.py
index 4418dbb..2cdc261 100644
--- a/mammoth/style_reader.py
+++ b/mammoth/style_reader.py
@@ -20,7 +20,8 @@ def _read_path_node(path_node):
 def _read_element_node(node):
     tag_names = _read_tag_names_node(node.children[0])
     class_names = _read_class_names_node(node.children[1])
-    return html_paths.element(tag_names, class_names=class_names)
+    fresh = _read_fresh_node(node.children[2])
+    return html_paths.element(tag_names, class_names=class_names, fresh=fresh)
 
 
 def _read_tag_names_node(node):
@@ -41,6 +42,10 @@ def _read_class_name_node(node):
     return node.children[1].text
 
 
+def _read_fresh_node(node):
+    return len(node.children) > 0
+
+
 def _repeated_children_with_separator(node, has_whitespace):
     yield node.children[0]
     
@@ -58,11 +63,13 @@ _grammar = Grammar(r"""
 
 path = element whitespace* (">" whitespace* element)*
 
-element = tag_names class_name*
+element = tag_names class_name* fresh?
+
+tag_names = identifier ("|" identifier)*
 
 class_name = "." identifier
 
-tag_names = identifier ("|" identifier)*
+fresh = ":fresh"
 
 identifier = ~"[A-Z0-9]*"i
 
diff --git a/tests/style_reader_tests.py b/tests/style_reader_tests.py
index a25d7ce..80c3124 100644
--- a/tests/style_reader_tests.py
+++ b/tests/style_reader_tests.py
@@ -46,8 +46,16 @@ class ReadHtmlPathTests(object):
 
     
     @istest
-    def can_read__multiple_classes_on_element(self):
+    def can_read_multiple_classes_on_element(self):
         assert_equal(
             html_paths.path([html_paths.element(["p"], class_names=["tip", "help"])]),
             read_html_path("p.tip.help")
         )
+
+    
+    @istest
+    def can_read_when_element_must_be_fresh(self):
+        assert_equal(
+            html_paths.path([html_paths.element(["p"], fresh=True)]),
+            read_html_path("p:fresh")
+        )
-- 
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