Adding pystache to third_party

third_party/pystache/src/parsed.py

+# coding: utf-8
+
+"""
+Exposes a class that represents a parsed (or compiled) template.
+
+"""
+
+
+class ParsedTemplate(object):
+
+    """
+    Represents a parsed or compiled template.
+
+    An instance wraps a list of unicode strings and node objects.  A node
+    object must have a `render(engine, stack)` method that accepts a
+    RenderEngine instance and a ContextStack instance and returns a unicode
+    string.
+
+    """
+
+    def __init__(self):
+        self._parse_tree = []
+
+    def __repr__(self):
+        return repr(self._parse_tree)
+
+    def add(self, node):
+        """
+        Arguments:
+
+          node: a unicode string or node object instance.  See the class
+            docstring for information.
+
+        """
+        self._parse_tree.append(node)
+
+    def render(self, engine, context):
+        """
+        Returns: a string of type unicode.
+
+        """
+        # We avoid use of the ternary operator for Python 2.4 support.
+        def get_unicode(node):
+            if type(node) is unicode:
+                return node
+            return node.render(engine, context)
+        parts = map(get_unicode, self._parse_tree)
+        s = ''.join(parts)
+
+        return unicode(s)