rst: use CSS for image alignment.

lib/github/commands/rest2html

@@ -207,6 +207,23 @@ class GitHubHTMLTranslator(HTMLTranslator):
     def depart_table(self, node):
         self.body.append('</table>\n')
 
+    def visit_image(self, node):
+        """Custom visit_image for using the HTML align attribute for
+        image alignment, since css-classes will be stripped.
+        """
+        HTMLTranslator.visit_image(self, node)
+        if self.body[-1].startswith('<img'):
+            # image with alignment
+            align = node.get('align')
+
+            if align is None and node.parent.tagname == 'figure':
+                # figure with alignment
+                align = node.parent.get('align')
+
+            if align:
+                self.body[-1] = self.body[-1].replace(
+                    ' />', ' style="float: %s" />' % align)
+
     def depart_image(self, node):
         uri = node['uri']
         ext = os.path.splitext(uri)[1].lower()

test/markups/README.rst

@@ -80,3 +80,6 @@ Press :kbd:`Ctrl+C` to quit
 .. raw:: html
 
     <p><strong>RAW HTML!</strong></p><style> p {color:blue;} </style>
+
+.. image:: foo.png
+   :align: right

test/markups/README.rst.html

@@ -93,3 +93,5 @@ <h2><a href="#id2">Field list</a></h2>
 <p>Press <kbd>Ctrl+C</kbd> to quit</p>
 
 <p><strong>RAW HTML!</strong></p> p {color:blue;}
+
+<img alt="foo.png" class="align-right" src="foo.png" style="float: right" />