Python 2.5 compatibility

[zzz-pokedex.git] / pokedex / db / rst.py

diff --git a/pokedex/db/rst.py b/pokedex/db/rst.py
index a77feef..baedf0e 100644 (file)
--- a/pokedex/db/rst.py
+++ b/pokedex/db/rst.py
@@ -41,6 +41,7 @@ import docutils.nodes
 from docutils.parsers.rst import Parser, roles
 import docutils.utils
 from docutils.writers.html4css1 import Writer as HTMLWriter
+from docutils.writers import UnfilteredWriter
 
 import sqlalchemy.types
 
@@ -54,6 +55,53 @@ class HTMLFragmentWriter(HTMLWriter):
         subs = self.interpolation_dict()
         return subs['body']
 
+
+class TextishTranslator(docutils.nodes.SparseNodeVisitor):
+    """A simple translator that tries to return plain text that still captures
+    the spirit of the original (basic) formatting.
+
+    This will probably not be useful for anything complicated; it's only meant
+    for extremely simple text.
+    """
+
+    def __init__(self, document):
+        self.document = document
+        self.translated = u''
+
+    def visit_Text(self, node):
+        """Text is left alone."""
+        self.translated += node.astext()
+
+    def depart_paragraph(self, node):
+        """Append a blank line after a paragraph, unless it's the last of its
+        siblings.
+        """
+        if not node.parent:
+            return
+
+        # Loop over siblings.  If we see a sibling after we see this node, then
+        # append the blank line
+        seen_node = False
+        for sibling in node.parent:
+            if sibling is node:
+                seen_node = True
+                continue
+
+            if seen_node:
+                self.translated += u'\n\n'
+                return
+
+class TextishWriter(UnfilteredWriter):
+    """Translates reST back into plain text, aka more reST.  Difference is that
+    custom roles are handled, so you get "50% chance" instead of junk.
+    """
+
+    def translate(self):
+        visitor = TextishTranslator(self.document)
+        self.document.walkabout(visitor)
+        self.output = visitor.translated
+
+
 class UnicodeOutput(Output):
     """reST Unicode output.  The distribution only has a StringOutput, and I
     want me some Unicode.
@@ -72,6 +120,7 @@ def generic_role(name, rawtext, text, lineno, inliner, options={}, content=[]):
 
 roles.register_local_role('ability', generic_role)
 roles.register_local_role('item', generic_role)
+roles.register_local_role('location', generic_role)
 roles.register_local_role('move', generic_role)
 roles.register_local_role('type', generic_role)
 roles.register_local_role('pokemon', generic_role)
@@ -147,6 +196,16 @@ class RstString(object):
         writer = HTMLFragmentWriter()
         return writer.write(document, destination)
 
+    @property
+    def as_text(self):
+        """Returns the string mostly unchanged, save for our custom roles."""
+
+        document = self.rest_document
+
+        destination = UnicodeOutput()
+        writer = TextishWriter()
+        return writer.write(document, destination)
+
 
 class MoveEffectProperty(object):
     """Property that wraps a move effect.  Used like this: